Rod Bundle Heat Transfer 

Facility Two-Phase Mixture 

Level Swell and Uncovery 

Test Experiments Data 

Report

Office of Nuclear Regulatory Research

NUREG/CR-7218

Volume 1

Rod Bundle Heat Transfer 

Facility Two-Phase Mixture 

Level Swell and Uncovery 

Test Experiments Data 

Report 

Manuscript Completed: July 2016

Date Published: September 2016

Prepared by: 

L.E. Hochreiter, F-B. Cheung, T.F. Lin, D.J. Miller, B.R. Lowery

The Pennsylvania State University

University Park, PA 16802

Division of Systems Analysis

Office of Nuclear Regulatory Research

U.S. Nuclear Regulatory Commission

Washington, DC 20555-0001

K. Tien, Project Manager

NRC Job Code N6154

Office of Nuclear Regulatory Research

NUREG/CR-7218

Volume 1

 

iii

ABSTRACT

A series of two-phase level swell and uncovery experiments have been performed in the US 

Nuclear Regulatory Commission/ Penn State Rod Bundle Heat Transfer Test (RBHT) Facility. A 

total of 75 experiments were performed in a quasi-steady state manner in which the inlet 

flooding rated into the RBHT rod bundle was slowly decreased in steps and the two-phase 

mixture level in the bundle was allowed to decrease. In several of the experiments the top 

region of the rod bundle became uncovered and the heater rod temperatures were significantly 

above the saturation temperature. 

The range of conditions investigated in the experiments were: pressure, 0.138 to 0.414 Mpa 

(20 to 60 psia); Inlet subcooling 11.1 to 69.4 degrees K (20 to 125 degrees F); Inlet injection

temperature 334 to 393 degrees K (142 to 247 degrees F); Peak linear power 0.492 to 1.31 

kw/m (0.15 to 0.4 kw/ft); and Inlet flooding rate 2.54 to 40.64 mm/s (0.1 to 1.6 in/s).

A one-dimensional energy balance was used to calculate the saturation location in the bundle 

as well as the local fluid quality. The resulting calculations were used to estimate the single and 

two-phase friction and acceleration pressure drop components such that the differential 

pressure measurements could be corrected and used to estimate the local void fraction 

distribution along the heated bundle. The two-phase mixture level or dryout locations were also 

determined from the heater rod thermocouple response as the local heat transfer changed from 

boiling to steam cooling. The resulting data can be used to assess the void fraction models and 

heat transfer models in the Nuclear Regulatory Commission advanced safety analysis computer 

codes.

v

FOREWORD

A loss-of-coolant accident (LOCA) is one of the primary postulated accidents that must be 

considered in the design of nuclear power plants. The plant response to such an accident, 

including the performance of safety systems that are designed to mitigate the accident, is mainly 

analyzed using computer codes. For effective analyses of accidents and operational transients, 

the U.S. Nuclear Regulatory Commission (NRC) consolidated earlier thermal-hydraulics 

analysis codes into one called TRACE.

The NRC is now assessing and improving the TRACE code as weaknesses are identified. 

One such weakness is inaccurate prediction of peak clad temperatures of fuel rods, particularly 

in the later stage of a large-break loss of coolant accident (LBLOCA), called the reflood phase. 

Specifically, the reflood models currently employed in the TRACE code are not sufficiently 

accurate and, consequently, improved models must be developed to provide necessary support 

for risk-informed regulations. Accurate prediction of the consequences of an LBLOCA is 

important because this is one of the limiting postulated accidents used to determine whether 

plant design parameters (such as power densities, equipment sizes, etc.) have been 

appropriately selected to ensure safety. As the NRC places increasing emphasis on riskinformed regulations, the agency needs a more accurate and reliable computer code to obtain 

realistic (rather than conservative) predictions.

To develop better computer code models for an LBLOCA, we need detailed, fundamental data 

that show heat, mass, and momentum exchanges. Some of these detailed data have only recently 

become possible because of recent advances in instrumentation technology for two-phase flow 

measurements. Consequently, to acquire detailed, fundamental data for use in developing 

models for an LBLOCA, the NRC sponsored the construction of a rod bundle heat transfer 

(RBHT) test facility and completion of four test series; reflood tests, liquid-gas interfacial drag 

tests, steam cooling tests without liquid droplet injection, and steam cooling tests with liquid 

droplet injection.

This report presents the results of liquid-gas interfacial drag tests. The data from these tests will 

be used to develop and assess an interfacial drag model which is a component of a LOCA 

model for the TRACE code. The results of other test series will be reported in separate reports.

With improved data and code models for an LBLOCA, we can more accurately predict 

the consequences of LBLOCA accidents and provide better technical bases for regulations 

associated with such accidents. As a result, this study will help to achieve the NRC’s strategic 

performance goals of making the agency’s regulations more effective, efficient, and realistic.

vii

TABLE OF CONTENTS

ABSTRACT ................................................................................................................... iii

FOREWORD............................................................................................................................ v

LIST OF FIGURES..................................................................................................................ix

LIST OF TABLES ...................................................................................................................xi

EXECUTIVE SUMMARY......................................................................................................xiii

ABBREVIATIONS..................................................................................................................xv

1. INTRODUCTION................................................................................................................. 1

1.1 Introduction ...................................................................................................................... 1

1.2 RBHT Two-Phase Mixture Level and Uncovery Test Matrix ............................................. 2

1.3 RBHT Two-Phase Mixture Level and Uncovery Test Method ........................................... 5

2. TEST FACILITY DESCRIPTION FOR TWO-PHASE MIXTURE LEVEL AND

UNCOVERY EXPERIMENTS...........................................................................................11

2.1 General Facility Description.............................................................................................11

 2.1.1 Test Section ...........................................................................................................13

 2.1.2 Lower Plenum ........................................................................................................22

 2.1.3 Upper Plenum ........................................................................................................22

 2.1.4 Large and Small Carryover Tanks..........................................................................24

 2.1.5 Steam Separator and Collection Tanks ..................................................................26

 2.1.6 Pressure Oscillation Damping Tank .......................................................................28

 2.1.7 Exhaust Piping .......................................................................................................29

 2.1.8 Injection Water Supply Tank...................................................................................30

2.2 Facility Improvements Over Previous Tests ....................................................................31

2.3 Instrumentation and Data Acquisition System .................................................................32

 2.3.1 Loop Instrumentation and Controls.........................................................................32

 2.3.2 Test Section Instrumentation..................................................................................35

 2.3.3 Data Acquisition System ........................................................................................43

3. CALCULATIONAL METHODS USED FOR THE RBHT TWO-PHASE

MIXTURE LEVEL AND UNCOVERY EXPERIMENTS .................................................45

3.1 Introduction .....................................................................................................................45

3.2 Analyzed RBHT Experiments ..........................................................................................45

3.3 ENERGY BALANCE Program.........................................................................................47

 3.3.1 Bundle Energy Balance Computer Code Background ............................................47

 3.3.2 Bundle Energy Balance Computer Code Equations and Derivations......................47

 3.3.3 Superficial Phase Velocity......................................................................................51

 3.3.4 Pressure Drop Correlations and Models.................................................................51
viii

 3.3.5 Axial Void Fraction .................................................................................................55

3.4 Experimental Data Comparisons.....................................................................................63

3.5 Void Fraction versus Elevation Data Comparisons..........................................................66

3.6 Void Fraction versus Quality Data Comparisons .............................................................69

4. CONCLUSIONS.................................................................................................................75

4.1 Conclusions.....................................................................................................................75

4.2 Recommendations for Future Work.................................................................................75

5. REFERENCES...................................................................................................................77

APPENDIX A. TEST RESULTS FOR ALL VALID EXPERIMENTS........................... A-1

APPENDIX B. UNCERTAINTIES ............................................................................... B-1

APPENDIX C. ENERGY BALANCE PROGRAM ....................................................... C-1
ix

LIST OF FIGURES

Figure 1-1 Inlet Flow Rate Versus Time for Entire Experiment Run for Experiment 

1683 ......................................................................................................................... 6

Figure 1-2 Exit Pressure Versus Time During Window XX from Figure 1-1 ................... 7

Figure 1-3 Bundle Power Versus Time During Window XX from Figure 1-1 .................. 7

Figure 1-4 Inlet Flow Velocity Versus Time During Window XX from Figure 1-1 ........... 8

Figure 1-5 Heater Rod Temperatures Versus Time for Entire Experiment Run for 

Experiment 1683 .................................................................................................... 9

Figure 2-1 RBHT Test Facility Schematic ........................................................................... 12

Figure 2-2 Test Facility Isometric View ............................................................................... 12

Figure 2-3 Test Section Isometric View .............................................................................. 14

Figure 2-4 Rod Bundle Cross Section View ....................................................................... 15

Figure 2-5 Heater Rod ........................................................................................................... 16

Figure 2-6 Heater Rod Axial Power Profile ......................................................................... 17

Figure 2-7 Mixing Vane Grid ................................................................................................. 18

Figure 2-8 Low Melt Reservoir .............................................................................................. 18

Figure 2-9 Flow Housing Cross Section View .................................................................... 19

Figure 2-10 Low Mass Flow Housing .................................................................................... 20

Figure 2-11 Housing Window .................................................................................................. 21

Figure 2-12 Lower Plenum ...................................................................................................... 23

Figure 2-13 Upper Plenum ...................................................................................................... 23

Figure 2-14 Exhaust Line Baffle ............................................................................................. 24

Figure 2-15 Small Carryover Tank ......................................................................................... 25

Figure 2-16 Large Carryover Tank ......................................................................................... 26

Figure 2-17 Steam Separator .................................................................................................. 27

Figure 2-18 Steam Separator Collection Tank ..................................................................... 28

Figure 2-19 Pressure Oscillation Damping Tank ................................................................. 29

Figure 2-20 Exhaust Piping ..................................................................................................... 30

Figure 2-21 Injection Water Supply Tank .............................................................................. 31

Figure 2-22 Loop Instrumentation Schematic ...................................................................... 34

Figure 2-23 Rod Bundle and Housing Instrumentation Axial Locations ........................... 36

Figure 2-24 Mixing Vane Grid Instrumentation .................................................................... 37

Figure 2-25 Grid No. 2 Instrumentation ................................................................................. 37

Figure 2-26 Grid No. 3 Instrumentation ................................................................................. 38

Figure 2-27 Grid No. 4 Instrumentation ................................................................................. 38

Figure 2-28 Grid No. 5 Instrumentation ................................................................................. 39

Figure 2-29 Grid No. 6 Instrumentation ................................................................................. 39

Figure 2-30 Grid No. 7 Instrumentation ................................................................................. 40

Figure 2-31 Instrumental Heater Rod Radial Location ........................................................ 41

Figure 2-32 Traversing Steam Probe Rake Schematic ...................................................... 43

Figure 3-1 Axial Void Fraction Plot for Uncorrected RBHT Data .................................... 46

Figure 3-2 Comparison of Corrected and Uncorrected Differential Pressure Cell 

Data, with Different Frictional Models...............................................................56

Figure 3-3 Axial Void Fraction Plot for Corrected RBHT Data ........................................57

Figure 3-4 Corrected Axial Void Fraction Plot Smoothed Over Rod Bundle Length ...58
x

Figure 3-5 Sample Input Deck for ENERGY BALANCE Program..................................59

Figure 3-6 Sample Output for ENERGY BALANCE Program .........................................60

Figure 3-7 Single Phase Vapor and Two-Phase Flow Interface versus Experimental 

Time......................................................................................................................64

Figure 3-8 Heater Rod Temperatures at an Elevation of Approximately 3.607 m 

(142 in.)................................................................................................................65

Figure 3-9 Heater Rod Temperatures at an Elevation of Approximately 3.073 m 

(121 in.)................................................................................................................66

Figure 3-10 Comparisons of Experimental Data at Various Pressures with Flow Rate

at 15.24 mm/s (0.6 in/s).....................................................................................68

Figure 3-11 Comparison of Experimental Data for Various Powers and Pressures 

with Flow Rate at 15.24 mm/s (0.6 in/s).........................................................69

Figure 3-12 Comparison of Experimental Data for Various Powers, Pressures, and 

Inlet Subcooling with Flow Rate at 15.24 mm/s (0.6 in/s)............................70

Figure 3-13 Void Fraction Versus Quality for Various Experiments at Different 

Pressures with Flow Rate at 15.24 mm/s (0.6 in/s)......................................71

Figure 3-14 Void Fraction Versus Quality for Various Experiments at Different 

Pressures and Powers with Flow Rate at 15.24 mm/s (0.6 in/s)................72

Figure 3-15 Void Fraction Versus Quality for Various Experiments at Different Inlet 

Subcoolings and Powers with Flow Rate at 15.24 mm/s (0.6 in/s)............73
xi

LIST OF TABLES

Table 1-1 Test Matrix Conditions............................................................................................. 2

Table 1-2 Two-Phase Mixture Level and Uncovery Test Series Test Matrix (Nominal 

Values) ...................................................................................................................... 3

Table 2-1 Differential Pressure Cell Spans along Bundle (from bottom of heated 

length) ..................................................................................................................... 42

Table 3-1 Test Conditions for the Analyzed RBHT Experiments ..................................... 45

Table 3-2 Minimum Achieved Flow Rates for Various Experimental Conditions ..........67

xiii

EXECUTIVE SUMMARY

As part of the Nuclear Regulatory Commission safety analysis computer code development 

efforts, the Rod Bundle Heat Transfer test facility has been designed and constructed at The 

Pennsylvania State University. The Rod Bundle Heat Transfer (RBHT) Facility is a full length 

simulation of a portion of a Pressurized Water Reactor (PWR) fuel assembly. The bundle is a 7 

by 7 rod array with four unheated corner rods and 45 heated electrical rod which simulate a 17 

by 17 PWR fuel assembly. The rod Bundle Heat Transfer Facility is full length, 3.66 m (12 ft), 

with typical PWR rod diameters of 9.49 mm (0.374 in) and a rod pitch of 12.6 m (0.496 in). The 

heater rods have a top skewed power shape with a peak to average power of 1.5 at the 2.77 m 

(9.08 ft) elevation. Typical PWR mixing vane spacer grids were simulated in the RBHT bundle. 

A series of 75 quasi-steady state, two-phase level swell and uncovery experiments were 

performed in the (RBHT) Facility. The inlet flooding rated into the RBHT rod bundle was slowly 

decreased in steps and the two-phase mixture level in the bundle was allowed to decrease. In 

several of the experiments the top region of the rod bundle became uncovered and the heater 

rod temperatures were significantly above the saturation temperature. The range of conditions 

investigated in the experiments were: pressure, 0.138 to 0.414 Mpa (20 to 60 psia); Inlet 

subcooling 11.1 to 69.4 degrees K (20 to 125 degrees F); Inlet injection temperature 334 to 393 

degrees K (142 to 247 degrees F); Peak linear power 0.492 to 1.31 kw/m (0.15 to 0.4 kw/ft); and 

Inlet flooding rate 2.54 to 40.64 mm/s (0.1 to 1.6 in/s). The data from these experiments were 

qualified and submitted to the Nuclear Regulatory Commission data bank for analysis and code 

validation purposes.

There are several unique features of the RBHT facility. There were traversing miniature steam 

probes in the bundle which measured the superheated steam temperature in the presence of 

entrained droplets. Steam probes were located in the bottom subcooled region, in the saturated 

boiling region, as well as in the upper region of the bundle where steam superheat occurred. 

There were a large number of sensitive differential pressure cells along the bundle which could 

be used, with analysis, to determine the local average void fraction over the differential pressure 

cell span. Some of the differential pressure cell spans were as short as 10.16 cm (4-inches). 

The mixing vane grids were also instrumented with miniature thermocouples such that spacer 

grid temperature behavior could also be characterized in addition to the heater rod and vapor 

temperature measurements. The detailed axial distribution of the heater rod thermocouples 

allowed for accurate determination of the two-phase mixture height in the RBHT facility. As the 

mixture height would decrease, the local thermocouple location would transition from a boiling 

situation to steam cooling with a corresponding sharp increase in the thermocouple response as 

the heater rod temperature increased. 

A one-dimensional energy balance method was used to calculate the saturation location in the 

bundle as well as the local fluid quality distribution along the bundle in the boiling region. The 

resulting calculations were then used to estimate the single and two-phase friction and 

acceleration pressure drop components such that the differential pressure measurements could 

be corrected and used to estimate the local void fraction distribution along the heated bundle. 

The two-phase mixture level or dryout locations were also determined from the heater rod 

thermocouple response as the local heat transfer changed from boiling to steam cooling. The 

resulting data are used to assess the void fraction and heat transfer models in the Nuclear 

Regulatory Commission advanced safety analysis computer codes.

xv

ABBREVIATIONS

Acronyms:

ASME – American Society of Mechanical Engineering

CHF – Critical Heat Flux

LHS – Left-Hand-Side

LOCA – Loss-of-Coolant Accident

NRC – Nuclear Regulatory Commission

OSV – Onset of Significant Void

PWR – Pressurized-Water Reactor

RBHT – Rod Bundle Heat Transfer

RHS – Right-Hand-Side

Greek Symbols: 

α – void fraction 

∆ – difference

– two-phase multiplier

μ – viscosity

ν – specific volume 

ρ – density 

σ – surface tension

2 φ
xvi

Symbols: 

A – area

c – specific heat

Dh – hydraulic diameter

De – hydraulic equivalent diameter

– friction factor

Fr – Froude number 

G – mass flux

g – acceleration due to gravity 

gc – gravitational constant

h – enthalpy

j – superficial velocity

– mass flow rate

P – pressure

PF – power factor

q' – linear power 

q''' – volumetric heat rate

Re – Reynolds number 

R – radius 

V – velocity

We – Weber number 

X – Martinelli parameter

x – quality 

f

m
xvii

Subscripts: 

1φ – two-phase 

2φ – two-phase

@ 9 ft. – at elevation of 9 feet 

accel – acceleration

c – cross-sectional

calc – calculated 

elev – elevation 

exp – experimental

f – liquid

fg– latent heat of vaporization

fo – liquid only 

fric – friction

g – vapor 

go – vapor only 

grid – spacer grid

i – generic incremental identifier

in – inlet

mix – mixture

p – constant pressure 

rel – relative

sat – saturation

span – differential pressure cell height
xviii

STP – standard temperature and pressure 

T – total

TP – two-phase 

wf – wall to liquid

wg – wall to vapor 
1

1. INTRODUCTION

1.1 Introduction

The Nuclear Regulatory Commission is currently reviewing new passive nuclear reactor plant 

submittals which use passive means of providing long term core cooling for postulated 

accidents. One of the key phenomena that must be calculated in such situations is the twophase level swell and void distributions within the reactor core at low pressure conditions. 

Currently there is a lack of high quality, detailed level swell data at low pressures typical of 

passive plant post-accident conditions. Accurate calculations of these phenomena are required 

to insure that the reactor core remains covered with a two-phase mixture and no core heat up is 

calculated to occur. There is a need for new detailed data on the void distribution such that 

interfacial drag can be computed. Computer code models for the mixture level, level swell, and 

interfacial drag can then be assessed and the accuracy of the calculations can be determined 

for the passive plant designs.

A series of experiments were performed as controlled two-phase level swell experiments at the 

Penn State/NRC Rod Bundle Heat Transfer (RBHT) Facility. The RBHT facility is designed to 

simulate a full-length portion of a Pressurized Water Reactor (PWR) fuel assembly. The facility 

consists of a 7x7-rod bundle with 45 electrically heated rods, mixing vane grids, and over 500 

different channels of instrumentation, which include heater rod thermocouples, very sensitive 

differential pressure cells for void determination, and fluid temperature probes. This 

instrumentation provides detailed measurements for a better understanding of the level swell 

and interfacial drag phenomenon that can occur within a heated rod bundle.

The main objectives of the two-phase level swell experiments were the following:

1. Provide an experimental data base on level swell at low pressures typical of passive plant 

post-accident conditions, covering the anticipated ranges of bundle powers, pressures, 

and inlet subcooling temperatures.

2. Deduce the axial void fraction distribution along the rod bundle from the level swell data.

3. Investigate the dependence of the local void fraction on the bundle power, pressure, and 

inlet subcooling.

The two-phase mixture level and uncovery experiments were performed over a range of 

powers, pressures, and inlet subcooled temperatures typical of reactor conditions. The 

experiments were performed using stepped inlet flow rate in which the flow was decreased, in 

controlled steps, until the rod bundle uncovered at the top and a two-phase mixture level existed 

in the heated bundle. Data was recorded for each set of inlet flow test conditions once a 

steady-state time period was achieved for the various flow rates. 

A one-dimensional energy balance computer program was used to reduce and analyze the 

experimental data from the level swell experiments. The cross-section averaged flow quality 

was calculated at each elevation of the bundle at which the pressure drop data had been 

obtained. The location of the liquid saturation line was determined such that the heated length 
2

of the bundle could be divided into a single and two-phase region. The measured pressure 

drop data from the differential pressure cells was corrected using both homogeneous and 

Friedel two-phase frictional pressure drop calculations as well as the homogenous two-phase 

acceleration pressure drop calculation to obtain the correct elevation pressure drop from the 

total measured pressure drop. The corrected elevation pressure drop was then used to 

calculate the bundle averaged axial void fraction as a function of axial position for the differential 

pressure spans along the length of the bundle.

1.2 RBHT Two-Phase Mixture Level and Uncovery Test Matrix

Several of the tests were conducted over a range of pressure, power, and inlet subcooled water 

temperature with only variations in the flow rates for each test. The similarities between the 

different tests allowed several experiments to be combined into a single test with step changes 

between the desired flow rates. Each individual experiment corresponds to a specific inlet flow 

rate at a given power, pressure, and inlet subcooling. Steady-state conditions were obtained for 

each “window” of data at which all conditions were constant. A minimum time period for each 

“window” was 60 seconds. In this manner, several experiments could be performed in a single 

day with just the inlet flow varying between each individual “window”.

Table 1-1 shows the ranges of the test conditions that were used for developing the test matrix.

Table 1-1 Test Matrix Conditions

The two-phase mixture level and uncovery test series consisted of 19 steady-state experiments 

and one transient experiment. These experiments covered a total of 75 individual test 

conditions. The completed test matrix is provided below in Table 1-2. The test matrix included 

tests with pressures controlled for the upper plenum of 0.138, 0.207, 0.276, and 0.414 MPa (20, 

30, 40, and 60 psia). The inlet flow was to be 55.6 degrees K (100 degrees F) subcooled based 

on the upper plenum pressures. The power and flow rate were the two variables that were 

adjusted during each experiment which provided the various individual test conditions.

The test matrix in Table 1-2 also includes additional test information that was obtained during 

shakedown testing and initial experimentations with the rod bundle as indicated by an asterisk . 

Also given is the number of steady-state windows for each test point. These tests are included 

as validated steady-state time periods were observed at the given conditions.

Test Condition Range

Pressure, MPa (psia) 0.138 - 0.414 (20 - 60)

Inlet Subcooling, K (o

F) 11.1 - 69.4 (20 - 125)

Inlet Injection Temperature, K (o

F) 334 - 393 (142 - 247)

Linear Power, kW/m (kW/ft) 0.492 - 1.31 (0.15 - 0.4)

Inlet Flow Rate, mm/s (in/s) 2.54 - 40.64 (0.1 - 1.6)
3

Table 1-2 Two-Phase Mixture Level and Uncovery Test Series Test Matrix (Nominal Values)

Upper Plenum 

Pressure Power Flow Rate Flow Rate

(kpa (psia)) (kW/m (kW/ft)) (cm/sec (in/sec)) (kg/sec (lb/sec))

Exp. 1578 1 137.9 (20) 0.656 (0.2) 3.05 (1.2) 0.1455 (0.3208) 4

2 137.9 (20) 0.656 (0.2) 2.54 (1.0) 0.1213 (0.2674) 3

Exp. 3 137.9 (20) 0.656 (0.2) 2.03 (0.8) 0.0970 (0.2139)

55.5 K (100 o

F) 

Subcooled 4

1678 A-C 4 137.9 (20) 0.656 (0.2) 1.52 (0.6) 0.0728 (0.1604) 3

and 5 137.9 (20) 0.656 (0.2) 1.02 (0.4) 0.0485 (0.1069) 3

Exp. 1679 6 137.9 (20) 0.656 (0.2) 0.51 (0.2) 0.0243 (0.0535) 3

6b 137.9 (20) 0.656 (0.2) 0.38 (0.15) 0.0182 (0.0401) 2

Exp. 1582 7 137.9 (20) 1.312 (0.4) 4.06 (1.6) 0.1940 (0.4278) 2

8 137.9 (20) 1.312 (0.4) 3.56 (1.4) 0.1698 (0.3743) 1

Exp. 1678D 9 137.9 (20) 1.312 (0.4) 3.05 (1.2) 0.1455 (0.3208) 1

(1 in/sec flow 

rate) 10 137.9 (20) 1.312 (0.4) 2.54 (1.0) 0.1213 (0.2674)

55.5 K (100 oF) 

Subcooled 3

11 137.9 (20) 1.312 (0.4) 2.03 (0.8) 0.0970 (0.2139) 1

12 137.9 (20) 1.312 (0.4) 1.52 (0.6) 0.0728 (0.1604) 1

12b 137.9 (20) 1.312 (0.4) 1.27 (0.5) 0.0606 (0.1337) 1

13 137.9 (20) 1.312 (0.4) 1.02 (0.4) 0.0485 (0.1069) 1

Exp. 14 275.8 (40) 0.656 (0.2) 3.05 (1.2) 0.1438 (0.317) 3

1651 15 275.8 (40) 0.656 (0.2) 2.54 (1.0) 0.1198 (0.2641) 2

16 275.8 (40) 0.656 (0.2) 2.03 (0.8) 0.0958 (0.2113) 2

17 275.8 (40) 0.656 (0.2) 1.52 (0.6) 0.0719 (0.1585)

55.5 K (100 oF) 

Subcooled 2

18 275.8 (40) 0.656 (0.2) 1.02 (0.4) 0.0479 (0.1057) 1

19 275.8 (40) 0.656 (0.2) 0.51 (0.2) 0.0239 (0.0528) 1

20 275.8 (40) 1.312 (0.4) 4.06 (1.6) 0.1917 (0.4226) 4

Exp. 21 275.8 (40) 1.312 (0.4) 3.56 (1.4) 0.1677 (0.3698) 5

1655 22 275.8 (40) 1.312 (0.4) 3.05 (1.2) 0.1438 (0.317) 3

23 275.8 (40) 1.312 (0.4) 2.54 (1.0) 0.1198 (0.2641)

55.5 K (100 o

F) 

Subcooled 3

Exp. 24 275.8 (40) 1.312 (0.4) 2.03 (0.8) 0.0958 (0.2113) 4

1683 25 275.8 (40) 1.312 (0.4) 1.52 (0.6) 0.0719 (0.1585) 2

26 275.8 (40) 1.312 (0.4) 1.02 (0.4) 0.0479 (0.1057) 2

Exp. 27 413.7 (60) 0.656 (0.2) 3.05 (1.2) 0.1425 (0.3141) 3

1659 28 413.7 (60) 0.656 (0.2) 2.54 (1.0) 0.1187 (0.2617) 2

29 413.7 (60) 0.656 (0.2) 2.03 (0.8) 0.0950 (0.2094_

55.5 K (100 o

F) 

Subcooled 3

30 413.7 (60) 0.656 (0.2) 1.52 (0.6) 0.0712 (0.157) 1

31 413.7 (60) 0.656 (0.2) 1.02 (0.4) 0.0475 (0.1047) 1

32 413.7 (60) 0.656 (0.2) 0.51 (0.2) 0.0237 (0.0523) 1

206.8 (30) 1.27 (0.5) 0.0606 (0.1337) 1

206.8 (30) 1.01 (0.398) 0.0481 (0.106) 1

Validated 

Steady-state 

Periods

Exp. 1585 122 o

F 

Subcooled

Experiment 

#

NRC 

Test #

Inlet 

Temperature
4

Table 1-2 Two-Phase Mixture Level and Uncovery Test Series Test Matrix (Nominal Values), 

Continued

Upper Plenum 

Pressure Power Flow Rate Flow Rate

(kpa (psia)) (kW/m (kW/ft)) (cm/sec (in/sec)) (kg/sec (lb/sec))

Exp. 33 206.8 (30) 0.738 (0.225) 2.54 (1.0) 0.1168 (0.2576)

11.1 K (20 oF) 

Subcooled 4

1637 34 206.8 (30) 0.492 (0.15) 2.54 (1.0) 0.1168 (0.2576) 5

35 206.8 (30) 0.492 (0.15) 1.78 (0.7) 0.0818 (0.1803) 4

36 206.8 (30) 0.492 (0.15) 1.27 (0.5) 0.0584 (0.1288)

11.1 K (20 o

F) 

Subcooled 5

37 206.8 (30) 0.492 (0.15) 0.76 (0.3) 0.0351 (0.0773) 4

38 206.8 (30) 0.492 (0.15) 0.51 (0.2) 0.0234 (0.0515) 7

38b 206.8 (30) 0.492 (0.15) 0.38 (0.15) 0.0175 (0.0386) 4

Exp.

1647

Exp. 40 206.8 (30) 0.492 (0.15) 2.54 (1.0) 0.1178 (0.2598) 2

1648 41 206.8 (30) 0.492 (0.15) 2.03 (0.8) 0.0943 (0.2079) 3

42 206.8 (30) 0.492 (0.15) 1.52 (0.6) 0.0707 (0.1559)

22.2 K (40 oF) 

Subcooled 2

43 206.8 (30) 0.492 (0.15) 1.02 (0.4) 0.0471 (0.1039) 1

44 206.8 (30) 0.492 (0.15) 0.51 (0.2) 0.0236 (0.052) 1

44b 206.8 (30) 0.492 (0.15) 0.38 (0.15) 0.0177 (0.039) 3

Exp. 1547 20 0.656 (0.2) 2.54 (1.0) 0.1243 (0.274) 2

137.9 (20) 0.656 (0.2) 2.03 (0.8) 0.0993 (0.219) 1

Exp. 1560 137.9 (20) 0.656 (0.2) 1.78 (0.7) 0.0871 (0.192) 1

137.9 (20) 0.656 (0.2) 1.52 (0.6) 0.0744 (0.164) 1

Exp. 1562 137.9 (20) 0.656 (0.2) 1.27 (0.5) 0.0621 (0.137) 1

137.9 (20) 0.656 (0.2) 1.27 (0.5) 0.0562 (0.124) 2

Exp. 1566 137.9 (20) 0.656 (0.2) 1.02 (0.4) 0.0499 (0.11) 1

137.9 (20) 0.656 (0.2) 0.76 (0.3) 0.0372 (0.082) 2

137.9 (20) 0.656 (0.2) 0.51 (0.2) 0.0249 (0.055) 2

Exp. 137.9 (20) 1.312 (0.4) 4.06 (1.6) 0.1987 (0.438) 1

1570 137.9 (20) 1.312 (0.4) 3.56 (1.4) 0.1742 (0.384) 1

137.9 (20) 1.312 (0.4) 3.05 (1.2) 0.1492 (0.329) 1

137.9 (20) 1.312 (0.4) 2.54 (1.0) 0.1243 (0.274) 1

137.9 (20) 1.312 (0.4) 2.03 (0.8) 0.0993 (0.219) 1

137.9 (20) 1.312 (0.4) 1.52 (0.6) 0.0744 (0.164) 1

Exp. 1572 206.8 (30) 0.738 (0.225) 2.54 (1.0) 0.1243 (0.274)

11.1 K (20 oF) 

Subcooled 3

Exp. 206.8 (30) 0.492 (0.15) 2.54 (1.0) 0.1243 (0.274) 2

1572 206.8 (30) 0.492 (0.15) 1.78 (0.7) 0.0871 (0.192) 1

206.8 (30) 0.492 (0.15) 1.27 (0.5) 0.0621 (0.137) 1

206.8 (30) 0.492 (0.15) 0.76 (0.3) 0.0372 (0.082) 1

206.8 (30) 0.492 (0.15) 0.51 (0.2) 0.0249 (0.055) 1

206.8 (30) 0.492 (0.15) 0.38 (0.15) 0.0186 (0.041) 1

206.8 (30) 0.492 (0.15) 0.353 (0.139) 0.0172 (0.038) 1

206.8 (30) 0.492 (0.15) 0.287 (0.113) 0.0141 (0.031) 1

Experiment 

#

NRC 

Test #

Inlet 

Temperature

Validated 

Steady-state 

Periods

39 206.8 (30) 0.738 (0.225) 2.54 (1.0) 0.1178 (0.2598)

22.2 K (40 oF) 

Subcooled 2

11.1 K (20 o

F) 

Subcooled

11.1 K (20 oF) 

Subcooled

11.1 K (20 o

F) 

Subcooled
5

Table 1-2 Two-Phase Mixture Level and Uncovery Test Series Test Matrix (Nominal Values), 

Continued

Data Window Test Points = 158 

 

1.3 RBHT Two-Phase Mixture Level and Uncovery Test Method

The experiments began with the water supply tank filled with water and the bundle also filled to 

an elevation of approximately 2.74 m (108 in.). The water was then heated to the desired initial 

inlet temperature for the individual experiment’s test conditions. Once the proper inlet injection 

temperature was achieved, the injection flow was initiated. Power was applied to the rod bundle 

once the injection flow was approximately one-half of the desired maximum flow. For example, 

if the desired maximum flow velocity of the experiment was 40.64 mm/s (1.6 in/s), then power 

was applied once the flow reached a rate of approximately 20.32 mm/s (0.8 in/s).

This start-up procedure insured the bundle was completely or nearly completely covered before 

power was applied. The process also helped to prevent premature dryout of the rods in the 

upper elevations, and also prevented large amounts of water that would have needed to be 

drained from the system as it exited the top of the bundle while the system was brought up to 

the necessary test conditions. However, as was expected with some higher flow rates, some 

excess liquid did exit from the top of the rod bundle. The excess liquid was collected in carryover tanks, which could be drained during the experiment. In addition to the carry-over tanks, a 

drainage tank was connected to the steam separator to collect the liquid that was removed from 

the steam. These tanks were drained as necessary. The drainage was conducted quickly in 

order to preserve system pressure. The drain valves were only opened for a short period of 

time to allow the tanks to almost completely empty. There was a perturbation on the system 

pressure which corrected itself once the valves were closed.

The flow rate was adjusted by several step changes to obtain the desired flow rates. Several 

step changes were required between each desired flow rate due to the sensitivity of the control 

gauges and flow meters used for measuring and adjusting the flow. Once a desired flow rate 

was achieved and steady-state conditions were observed, data was recorded for a minimum of 

sixty (60) seconds at those testing conditions. The experiments were terminated when the twophase mixture level dropped to an elevation such that the temperatures of the heater rods 

exceeded a maximum of 700 – 755 K (800 – 900 o

F). This maximum temperature was selected 

to prevent potential failure of the heater rods.

Figure 1-1 shows the inlet flow velocity versus the experimental time for test 1683 with a steady 

velocity time window indicated. The velocity was step changed between the desired values. 

These step changes are meant to achieve a steady flow velocity at each desired level for at 

Upper Plenum 

Pressure Power Flow Rate Flow Rate

(kpa (psia)) (kW/m (kW/ft)) (cm/sec (in/sec)) (kg/sec (lb/sec))

Exp.

1690

Experiment 

#

NRC 

Test #

Inlet 

Temperature

Validated 

Steady-state 

Periods

206.8 (30) 0.492 (0.15)

1.52 (0.6) ?

0.305 (0.12) ?

1.52 (0.6)

0.0707 (0.1559) ?

0.0142 (.0312) ?

0.0707 (0.1559)

22.2 K (40 o

F) 

Subcooled N/A
6

least 60 seconds. As can be seen in the figure, eleven (11) individual steady-state test windows 

were performed in this single experiment. These individual tests were for flow velocities of 

40.64, 35.56, 30.48, 25.40, 20.32, 15.24, and 10.16 mm/s (1.6, 1.4, 1.2, 1.0, 0.8, 0.6, and 0.4 

in/s).

Figure 1-1 Inlet Flow Rate Versus Time for Entire Experiment Run for Experiment 1683

Figure 1-2 thru Figure 1-4 show the pressure, power, and flow velocity, respectively, during one 

of the steady-state condition recorded test times indicated in Figure 1-1 as window XX.

window XX
7

Figure 1-2 Exit Pressure Versus Time During Window XX from Figure 1-1

Figure 1-3 Bundle Power Versus Time During Window XX from Figure 1-1
8

Figure 1-4 Inlet Flow Velocity Versus Time During Window XX from Figure 1-1

As one can see from the Figure 1-2 through Figure 1-4, the power remained constant while 

pressure and flow velocity showed very minimal variances during the recorded testing time. 

The ability to maintain steady-state conditions for an extended period of time is important for 

accurate measurements and allows for better comparisons to the model predictions of computer 

codes. Figure 1-5 shows the temperature plot of the heater rod thermocouples near the top of 

the rod bundle. The heater rods remain in nucleate boiling as long as they remain covered by a 

two-phase mixture. Once the mixture level decreases below the heater rod instrumented 

position (3.615 m, 142.3 in.) dryout occurs and the rods are cooled by steam cooling and 

undergo a temperature excursion. The maximum temperature the rods achieved prior to the 

test being scrammed is within the allowed range, as the maximum temperature is approximately 

769 K (925 o

F).
9

Figure 1-5 Heater Rod Temperatures Versus Time for Entire Experiment Run for Experiment 1683

 
 
11

2. TEST FACILITY DESCRIPTION FOR TWO-PHASE MIXTURE LEVEL AND

UNCOVERY EXPERIMENTS

The Rod Bundle Heat Transfer (RBHT) Test Facility is designed to conduct systematic 

separate-effects tests under well-controlled conditions in order to generate fundamental rod 

bundle heat transfer data from single phase steam cooling tests, low flow boiling tests, steam 

flow tests with and without injected droplets, and forced reflood tests which simulate inverted 

annular film boiling, and dispersed flow film boiling heat transfer. The facility is capable of 

operating in both forced and variable reflood modes covering wide ranges of flow and heat 

transfer conditions at pressures from 138 to 414 kPa (20 to 60 psia).

2.1 General Facility Description

The test facility consists of the following major components shown schematically in Figure 2-1, 

and in an isometric view in Figure 2-2.

• A test section consisting of a lower plenum, a low-mass housing containing the heater

rod bundle, and upper plenum

• Coolant injection and steam injection systems

• Closely coupled phase separation and liquid collection systems

• An injection system

• A pressure fluctuation damping tank and steam exhaust piping
12

Figure 2-1 RBHT Test Facility Schematic

Figure 2-2 Test Facility Isometric View
13

2.1.1 Test Section

The test section consists of the heater rod bundle, the flow housing, and the lower and upper 

plenums, as show in Figure 2-3. The heater rod bundle simulates a small portion of a 17 x 17 

Pressurized Water Reactor (PWR) reactor fuel assembly. The electrically powered heater rods 

have a diameter of 9.5 mm (0.374 in) arranged in a 7 x 7 array with a 12.6 mm (0.496 in) pitch, 

as shown in Figure 2-4. The bundle has 45 heater rods and four unheated corner rods. The 

corner rods are used to support the bundle grid and fluid thermocouple leads. The support rods 

are made from Inconel 600 tubing having a diameter 9.525 mm (0.37 in), a wall thickness of 

2.108 mm (0.083 in), and a total length of 3.96 m (156 in). The heater rods are single ended 

and consist of a Monel 500 electrical resistance element filled and surrounded by hot pressed 

boron nitride (BN) insulation, and enclosed in a Inconel 600 cladding, as shown in Figure 2-5. 

This material was chosen for its high strength and low thermal expansion coefficient at high 

temperatures, which minimizes rod bowing and failure at high temperature operating conditions 

since it was desired to re-use the heater rods for multiple experiments. The heater rods have a 

3.66 m (12 ft) heated length with a skewed axial power profile, as shown in Figure 2-6, with the 

peak power located at the 2.74 m (9 ft) elevation. The maximum-to-average power ratio 

(Pmax/Pavg) is 1.5 at the peak power location and 0.5 at both ends of the heated length. The 

bundle has a uniform radial power distribution. 

Power to each rod is provided by a 60 volt, 12,600 amp, 750 kW DC power supply. Each rod is 

rated for 10 kW, and designed to operate at 13.8 bars (200 psig) at a maximum temperature of 

1477 degrees K (2200 degrees F), but because of its solid construction it can be operated at up 

to 103.4 bars (1500 psig). Each rod is instrumented with eight (8) 0.508 mm (0.02 in) diameter 

ungrounded thermocouples attached to the inside surface of the Inconel sheath at various 

locations. All of the thermocouple leads exit at the heater rod bottom end. The Inconel 600 

thermocouple sheath is compatible with the heater rod cladding and housing material to reduce 

differential thermal expansion and minimize the possibility of causing thermocouple failure 

during the thermocycling operations.

The rod bundle has seven (7) mixing vane grids shown in Figure 2-7. These grids are similar in 

design of a PWR 17 x 17 fuel assembly, but instead of having dimples and springs, these grids 

have all dimples which provide a cold clearance of 0.127 mm (0.005 in) around each heater rod 

in order to prevent bowing when the heater rods are linearly expanding at high temperatures. 

The grids straps are made out of Inconel 600 alloy sheets which are 0.508 mm (0.020 in) thick 

and are 44.45 mm (1.75 in) in height including the mixing vanes. The grids are located 522 mm 

(20.55 in) apart except for the spacing between the first and second grid, which is 588.26 mm 

(23.26 in) apart. The first grid is located 102 mm (4.01 in) above the bottom of the heated 

length. The grids in conjunction with the corner rods form the heater rod bundle support 

structure. The grid locations are similar to the ones found in a 17 x 17 PWR fuel assembly. The 

heater rod top extensions are attached to the 25.4 mm (1 in) thick nickel ground plate by means 

of a Morse taper that provides a good electrical contact. The heater rod bottom extension and 

copper electrode extend through the lower plenum O-ring pressure seal plate. 
14

Figure 2-3 Test Section Isometric View
15

Figure 2-4 Rod Bundle Cross Section View
16

Figure 2-5 Heater Rod
17

Figure 2-6 Heater Rod Axial Power Profile

The copper electrodes, which are 5.84 mm (0.23 in) in diameter and 203 mm (8 in) long, extend 

through holes drilled in the low-melt reservoir shown in Figure 2-8. This reservoir serves as the 

electrical power supply positive connection. It contains a low temperature melting alloy at about 

344 degrees K (160 degrees F) which is an excellent conductor, thus providing a good electrical 

contact and mechanical cushion allowing for rod thermal expansion to each heater rod.

The flow housing provides the pressure and flow boundary for the heater rod bundle. It has a 

square geometry. Its inside dimensions are 90.2 by 90.2 mm (3.55 x 3.55 in), and wall 

thickness 6.4 mm (0.25 in) as shown in Figure 2-4. The housing is made out of Inconel 600, the 

same material used for the heater rod cladding and thermocouple sheaths. As pointed out 

previously, the high strength of Inconel 600 at elevated temperatures will minimize housing 

distortion during testing. The 6.4 mm (0.25 in) wall thickness is the minimum allowable for 

operating at 4.2 bars (60 psig) and 811degrees K (1000 degrees F), taking into consideration 

the cutouts to accommodate the large windows and numerous pressure and temperature 

penetrations through the walls, as shown in Figure 2-10. The empty housing has a flow area of 

83.4 cm2 (12.9 in2

). With the rod bundle in place the flow area is 48.6 cm 2 (7.5 in2) . This area 

is 7.21 percent larger than the ideal flow area of a 7 x 7 rod bundle configuration. The excess 

flow area is due to the flow housing inside dimensional tolerance and the space needed to insert 

the rod bundle in the housing. The gap between the outer rods and the flow housing inner wall 

is 2.5 mm (0.1 in) wide.

Heater Rod Axial Power Profile

0.5

0.7

0.9

1.1

1.3

1.5

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

Power Ratio (Px/Pavg)

0 20 40 60 80 100 120 140

Length (in)
18

Figure 2-7 Mixing Vane Grid

Figure 2-8 Low Melt Reservoir
19

Figure 2-9 Flow Housing Cross Section View

The flow housing has six pairs of windows. Each window provides a 50.8 mm x 292 mm (2.0 in. 

X 11.5 in) viewing area. Each pair of windows is placed 180 degrees apart and located axially at 

elevations overlapping rod bundle spacer grids, thus providing a viewing area about 88.9 mm 

(3.5 in) below and 152 mm (6 in) above the corresponding space grids. The windows will 

facilitate the measurement of droplet size and velocity using a Laser illuminated Digital Camera 

System (LIDCS). In addition, high speed movies using diffused back lighting can be taken 

during the experiments for visualization and flow regime information. The windows are made 

out of optical grade fused quartz and are mounted on the housing by means of a bolted flange 

and Kemprofile high temperature gasket material, as shown in Figure 2-11. 
20

Figure 2-10 Low Mass Flow Housing
21

Figure 2-11 Housing Window

The flow housing is supported from the nickel plate and upper plenum, allowing it to freely 

expand downward, thus minimizing thermal buckling and distortion. The two-phase void fraction 

will be measured using sensitive differential pressure cells. The flow housing has 23 pressure 

taps located at various elevations, as shown in Figure 2-10. The pressure taps are connected 

to sensitive differential pressure (D/P) cells providing measurements to calculate single-phase 

friction losses for determining base rod bundle and grid loss coefficients. Among these 

pressure taps, 16 are located about 76.2 to 127 mm (3 to 5 in) apart to provide detailed void 

fraction measurements in the froth region about the quench front. 

The flow housing also has 13 stand-off penetrations at various elevations for the traversing 

Steam Probe Rakes which measure the superheated steam temperatures in the dispersed flow 

regime.
22

2.1.2 Lower Plenum

The lower plenum is attached to the bottom of the flow housing. The lower plenum is made out 

of nominal 203 mm (8 in) schedule 40, 304 stainless steel pipe with an inside diameter of 202 

mm (7.94 in), a height of 203 mm (8 in), and a volume of 6570 cm3 (0.232 ft3

), as shown in

Figure 2-12. The lower plenum is use as a reservoir for the coolant prior to injection to the rod 

bundle. The lower plenum connects to the injection water line and steam cooling line. It has two 

penetrations for thermocouples monitoring the coolant temperature during testing, and pressure 

taps for static and differential pressure measurements. 

The lower plenum also has four Conax fittings with multiple probes sealing glands for the bundle 

grid, steam probes and support rod wall thermocouple extensions that are routed through the 

bottom of the rod bundle. It contains a flow baffle, which is attached to the flow housing bottom 

flange. The flow baffle has a square geometry, similar to the holes that act as a flow distributor 

and flow straightener to provide and even flow distribution into the rod bundle. 

2.1.3 Upper Plenum

The upper plenum serves as the first stage for phase separation and liquid collection of the twophase effluent exiting the rod bundle. The liquid phase separates due to the sudden expansion 

from the bundle to the larger plenum flow area. The de-entrained liquid is collected around the 

flow housing extension in the upper plenum. The extension acts as a weir preventing the 

separated liquid from falling back into the heater rod bundle. The upper plenum vessel 

configuration is shown in Figure 2-13. The vessel is made from a 203 mm, (8 in) 204 stainless 

steel pipe with an inside diameter of 202 mm (7.94 in) and a height of 305 mm (12 in). It has a 

volume of 9873 cm3 (0.347 ft3

). The plenum has a 76.2 mm (3 in) pipe flange connection to the 

steam separator and two penetrations for fluid thermocouples. It is covered with a 203 mm (8 

in) 304 stainless steel blind flange. This flange has a 25.4 mm (1 in) penetration for steam 

injection, venting, and connecting the safety relief valve and rupture disc assembly. It also has 

a pressure tap penetration for static and differential pressure measurements. In addition, the 

upper plenum contains an exhaust line baffle shown in Figure 2-14. The baffle is used to further 

de-entrain water from the steam and prevents water dripping from the upper plenum cover 

flange to be carried out by the exhaust steam. The baffle has a 76.2 mm (3 in) flange 

connection at one end. It is inserted through the upper plenum exit nozzle, and it is bolted 

between the nozzle flange and the flange of the pipe going to the steam separator.
23

Figure 2-12 Lower Plenum

Figure 2-13 Upper Plenum
24

Figure 2-14 Exhaust Line Baffle

2.1.4 Large and Small Carryover Tanks

The de-entrained liquid from the upper plenum drains into the top of a 25.4 mm (1 in) tube which 

extends inside a small carryover tank to detect and measure the carryover liquid as soon as 

possible. This tank, shown in Figure 2-15, is close-coupled in series with a larger carryover 

tank, shown in Figure 2-16, which collects and measures the amount of liquid overflow from the 

smaller carryover tank. The small carryover tank has a volume of about 1388 cm3 (0.049 ft3

), 

and is used to more accurately measure the initial water being collected as a function of time. 

The smaller carry over tank is made from 50.8 mm (2 in) schedule 80 stainless steel pipe having 

an overall length of 914 mm (36 in) including the end caps. The large carryover tank is made 

from a 102 mm (4 in) schedule 40 stainless steel pipe with a bottom end cap and top flanges 

having an overall length of 183 cm (6 ft) and a capacity of 15917 cm3 (0.562 ft3

) Each tank is 

connected with 25.4 mm (1 in) flexible hose, and has a 25.4 mm (1 in) drain tube, and 9.5 mm 

(0.375 in) tubes with wall penetration for installing fluid instrumentation and level indicators.
25

Figure 2-15 Small Carryover Tank
26

Figure 2-16 Large Carryover Tank

2.1.5 Steam Separator and Collection Tanks

The wet steam exhausted from the upper plenum flows through a steam separator (or dryer), 

shown in Figure 2-17, where carryover liquid droplets are further separated from the steam and 

collected in a small collection tank, shown in Figure 2-18, attached to the bottom of the steam 

separator. The steam separator relies on centrifugal force action to provide 99 percent dry 

steam. The separated liquid is drained into a collection tank where differential pressure cell is 

used as a level meter to measure liquid accumulation. The steam separator is fabricated from a 

356 mm (14 in) diameter 316 stainless steel pipe and is 914 mm (36 in) long. It has 76.2 mm (3
27

in) connecting nozzles, a 25.4 mm (1 in) drain, and a 12.7 mm (0.5 in) top vent. It also has two 

pressure taps for liquid level measurements and two 38.1 mm (1.5 in) side nozzle connections. 

The drain tank is a small vessel with a capacity of 11329 cm3 (0.4 ft3

). It is made from a 102 

mm (4 in) schedule 80, 304 stainless steel pipe with an overall length of 1.78 m (70 in), 

including both end caps. It has a 25.4 mm (1 in) drain nozzle, a 25.4 mm (1 in) pipe top 

connection to the steam separator, pressure taps and fluid thermocouple connections.

Figure 2-17 Steam Separator
28

Figure 2-18 Steam Separator Collection Tank

2.1.6 Pressure Oscillation Damping Tank

The dry steam from the steam separator flows into a pressure oscillation-damping tank. As its 

name implies, it is used to dampen pressure oscillations at the upper plenum caused by rapidly 

oscillating steam generation rates in the heater rod bundle during testing. This effect is coupled 

to the characteristics of the pressure control valve, which is located downstream in the steam 

exhaust line. It is desirable to have a smooth pressure control in order to minimize uncertainties 

when calculating mass balances, steam generation rates, and heat transfer coefficients in the 

heater rod bundle, and avoid the pressure control valve causing oscillations in the bundle as it 

cycles. The tank has a volume of 0.209 m3 (7.38 ft3

), which is approximately equal to the total 

volume of the rest of the test facility. The pressure tank is fabricated from 356 mm (14 in), 304 

stainless steel standard schedule pipe by 2.59 m (102 in) long, as shown in Figure 2-19. Inside 

the tank is a 76.2 mm (3 in) , schedule 40, 304 stainless steel pipe that provides a tortuous path 

for the steam flow to expand into a large volume, thus damping pressure oscillations. The inlet 

and outlet nozzles are 76.2 mm (3 in) in diameter with flanges. The vent and drain lines are 

made of 25.4 mm (1 in) stainless steel pipe. There are 9.53 mm (0.375 in) tube penetrations for 

a fluid thermocouple and two static pressure taps. The tank walls are heated with clamp-onstrip heaters up to about 11 degrees K (20 degrees F) above saturation temperatures to prevent 

steam condensation.
29

Figure 2-19 Pressure Oscillation Damping Tank

2.1.7 Exhaust Piping

The steam flowing out of the pressure oscillation-damping through a 76.2 mm (3 in) schedule 

40, 304 stainless steel pipe shown schematically in Figure 2-20. The exhaust line has a Vortex 

flow meter, a 76.2 mm (3 in) V-Ball pressure control valve, and a muffler at the exit to minimize 

the noise caused by steam blowing into the atmosphere. The pressure control valve is 

activated by a signal from a static pressure transmitter located on the upper plenum. The line is 

also instrumented with a static pressure transmitter, fluid thermocouples, and outer wall 

thermocouples. The 76.2 mm (3 in) line has flow-straightening vanes which reduce the pipe 

length requirements upstream of the Vortex flow meter in order to obtain accurate flow 

measurements. This line has strapped-on electrical heaters to keep the wall temperatures 
30

about 11degrees K (20 degrees F) above saturation to insure that single-phase steam flow 

measurements are made by the Vortex flow meter.

Figure 2-20 Exhaust Piping

2.1.8 Injection Water Supply Tank

The injection water system consists of a water supply tank, a circulation pump, and 

interconnecting lines to the test section lower plenum. The water supply tank shown in Figure 

2-21, has a capacity of 0.953 m3 (251.75 gal). It is designed for 4.14 bars (60 psia) and 427

degrees K (310 degrees F). The tank is equipped with a submersible electrical heater to heat 

the injection water to specified test temperatures. The tank is pressurized by a nitrogen supply 

system, which regulates the over-pressure needed for the forced flooding injection tests. The 

tank has inlet and outlet nozzles, pressure taps for level measurements, fluid and wall 

thermocouples. Water from the tank can be circulated through the test section by a centrifugal 

pump with a capacity up to 0.946 m3

/min (250 gpm) which are needed to perform liquid singlephase flow tests. 
31

Figure 2-21 Injection Water Supply Tank

2.2 Facility Improvements Over Previous Tests

Significant improvements related to other heater rod bundle testing programs, listed in 

Section 3.0 Literature Review of the Peer Review Report have been incorporated in the RBHTTest Facility. These improvements include: 

• A low mass square flow housing design which better fits a square rod bundle array and

minimized the housing mass and excess rod bundle flow area.

• The six pairs of windows which provide large viewing areas below and about grid

locations, making it possible to observe and make void fraction measurements during

testing.
32

• The use of a traversing steam probe rake to measure simultaneously steam

temperatures in the flow subchannel and in the rod-to-rod gap. They are specially

designed such that they would not stay wet after having contacted by liquid droplets.

• Differential pressure transmitters axially located 76.2 mm to 127 mm ( 3 to 5 in.) apart in

conjunction with heater rod and flow housing wall thermocouples to obtain detailed void

fraction and heat transfer information.

• Addition of a large pressure oscillation-damping tank to minimize test section oscillations

observed in the FLECHT and FLECHT-SEASET tests.

• The incorporation of close coupled entrained liquid collection tanks and piping to reduce

delay times for liquid collection.

2.3 Instrumentation and Data Acquisition System

The test instrumentation is designed to measure temperatures, power, flows, liquid levels, 

pressures, and void fractions. The local average void fraction can be calculated over the 

differential pressure cell spans. Detailed axial distribution of heater rod thermocouples allowed 

for accurate determination of the two-phase mixture height in the RBHT facility. The mixture 

height decreased during the experiments, resulting in the local thermocouple location 

transitioning from a boiling situation to steam cooling with a corresponding sharp increase in the 

thermocouple response as the heater rod temperature increased. Heater rod power, heat rod 

temperature, and fluid temperature are used to calculate heat fluxes and heat transfer 

coefficients, quench times, rod bundle energy losses, convective and radiation heat transfer to 

steam, droplets, grids, support rods, and housing. Effects of grids, support rods and housing 

behavior can be determined.

2.3.1 Loop Instrumentation and Controls

Loop instrumentation is shown schematically in Figure 2-23. One hundred and twenty three 

(123) instrumentation channels are assigned to the collection of electrical power, fluid and wall 

temperatures, levels, flows differential pressures, and static pressure measurements. The 

injection water supply tank has three fluid and three wall thermocouples to monitor water and 

wall temperatures during heat-up prior to testing. It has a differential pressure transmitter used 

as a level meter to determine water mass in the tank and mass depletion during testing. It also 

has a static pressure transmitter that monitors the nitrogen over pressure and controls the 

nitrogen flow needed to maintain a constant pressure during testing. The water injection line is 

equipped with a Coriolis Effect Micromotion flow meter that directly measures mass flows up to 

454 kg/min (1000 lbs./min) with an accuracy of plus or minus eleven hundredths of a percent 

(±0.11 percent) of rate. The steam line has a Rosemount Vortex shedding flow meter to 

measure flow up to 7.08 m3

/min (250 ft3/min) with an accuracy of plus or minus 65 hundredths 

of a percent (±0.65 percent) of rate. Each flow meter is connected through a pneumatic 
33

controller to a V-ball flow control valve. Each line has a fluid thermocouple to measure water or 

steam temperature during heat-up and forced injection testing. They also have a static pressure 

transmitter which in conjunction with the thermocouples can determine the thermodynamic 

properties of the fluid. The injection line has three wall thermocouples to monitor wall 

temperatures during heat-up and during testing. One of these thermocouples in conjunction 

with a temperature controller regulates the power to an electrical heating cable wrapped around 

the injection line. The heating cable is used to heat-up the injection line wall and to maintain the 

injection water at the required injection temperature.

The small carryover tank has one fluid and two wall thermocouples. The large carryover tank 

instrumentation consists of one fluid thermocouple, three wall thermocouples. Both tanks have 

a liquid level meter, which measures the amount of carryover liquid being collected during 

testing. In addition, a differential pressure transmitter is connected from the top of the carryover 

tank to the upper plenum to determine the static pressure in the carryover tank.

The steam separator is instrumented with one fluid and two wall thermocouples. The drain tank 

is instrumented with two fluid and two wall thermocouples. The fluid thermocouple measures 

the water temperature de-entrained during testing. The wall thermocouples monitor wall 

temperatures during heat-up. The volume of de-entrained water is measured with a level meter 

connected across the drain tank.

The pressure oscillation damping tank has two fluid and three wall thermocouples which are 

used to monitor vessel walls during heat-up, and to insure that the vessel wall is at a 

temperature above saturation to prevent condensation. One wall thermocouple in conjunction 

with a temperature controller monitors the power applied to clamp-on heaters that heat up the 

tank to the desired wall temperature. 

The exhaust line is equipped with a Vortex flow meter which, in conjunction with a static 

pressure transmitter and a fluid thermocouple measurements are used to calculate steam 

volumetric flows up to 7.08 m3

/min (250 ft3/min). The flow meter has an accuracy of plus or 

minus 65 hundredths of a percent (±0.65 percent) of the rate. The exhaust line also has three 

wall thermocouples to measure pipe wall temperatures. One wall thermcouple in conjunction 

with a temperature control regulates the power going to clamp-on-heaters which are used for 

heating the pipe walls up to a temperature about 11degrees K (20 degrees F) above saturation 

to prevent steam condensation and to insure accurate single phase steam flow measurements. 

The exhaust line has V-ball pressure control valve. This valve is controlled by a static pressure 

transmitter through a pneumatic controller connected to the top of the upper plenum in order to 

maintain constant test section pressure during testing.
34

Figure 2-22 Loop Instrumentation Schematic
35

2.3.2 Test Section Instrumentation

The test section instrumentation consists of the heater rod bundle and flow housing, the lower

plenum, and the upper plenum groups. The heater rod bundle and flow housing instrumentation 

is shown schematically in Figure 2-24. This figure shows the instrumentation axial locations in 

relation to heater rod heated length, heater axial power profile, grids, steam probes and steam 

probe rakes, housing pressure taps and windows.

Six grids have thermocouples attached to their surfaces in order to determine dryout behavior 

during testing shown in Figure 2-25 through Figure 2-30. Grid and Steam Probes axial locations 

are shown schematically in Figure 2-24. Eight groups of heater rods have thermocouples at 

different elevations to cover, as much as possible, the entire rod bundle heated length. The 

radial location of each heater rod group is shown in Figure 2-31. The radial locations of 

instrumentation rods were chosen in order to be able to characterize heat transfer of hot rods 

simulated by the center rods, rod-to-rod and rod-to-housing radiation heat transfer. For this 

purpose, heater rod thermocouples, steam probes, and housing wall thermocouples are located 

at the same elevations. In addition, symmetrical location of the same group of instrumented 

heater rods will help in the data analysis and will determine any anomalies in the radial flow 

distribution through the heater rod bundle. Heater rod thermocouples are also placed at varying 

distances downstream from a grid to determine the decreasing heat transfer gradient between 

grid spans. The steam probes or fluid thermocouples are located at short distances upstream 

and downstream of a grid to determine the effect of water droplets being shattered by the grids 

on droplet size and distribution, and the desuperheating effect on the steam temperatures in the 

disperses flow regime.

The vapor or steam temperature is measured using miniature thermocouples having a diameter 

of 0.813 mm (0.032 in) which are attached to the spacer grids, as well as the traversing steam 

probe rakes having a diameter of 0.381 mm (0.015 in). These are very small diameter 

thermocouples that have a fast response time such that they can follow the vapor temperature 

accurately in a dispersed, non-equilibrium, two-phase flow. As the froth front approaches, the 

number and sizes of the droplets increase which can lead to wetting of these thermocouples. 

The traversing steam probe rakes are located at the spans between the grids at the upper 

heater rod bundle elevations, as shown schematically in Figure 2-32. The traversing steam 

probes rakes will measure steam temperatures in the heater rod bundle flow subchannels and 

the gap between the heater rods during the dispersed flow regime. The traversing steam probe 

rake is shown in Figure 2-32. Each rake consists of three 0.381 mm (0.015 in) diameter 

ungrounded thermocouples mounted on a 0.356 mm (0.014 in) thick by 6.35 mm (0.25 in) wide 

Inconel strip. The thermocouples are spaced 12.6 mm (0.496 in) apart which correspond to the 

heater rod spacing in the bundle. The thermocouple tips are located facing the steam flow. A 

2.39 mm (0.094 in) diameter tube attached to be strip is used to traverse the steam probe rake 

across the rod bundle. This tube also carries the thermocouples leads outside the flow housing 

through an extension tube and a pressure seal. The tube is attached to an automated sliding 

mechanism shown in Figure 2-33. It consists of a sliding bar, a 24 DCV motor with a ball drive 

shaft, and a linear potentiometer provides a voltage input to the Data Acquisition System which 

determines the rake thermocouple location and travel distances across the heater rod bundle.
36

Figure 2-23 Rod Bundle and Housing Instrumentation Axial Locations
37

Figure 2-24 Mixing Vane Grid Instrumentation

Figure 2-25 Grid No. 2 Instrumentation
38

Figure 2-26 Grid No. 3 Instrumentation

Figure 2-27 Grid No. 4 Instrumentation
39

Figure 2-28 Grid No. 5 Instrumentation

Figure 2-29 Grid No. 6 Instrumentation
40

Figure 2-30 Grid No. 7 Instrumentation

Two fluid thermocouples are placed 24.5 mm (1 in) below the bottom of the bundle heated 

length such that injection water temperatures are monitored throughout the test. 

There are twenty-three pressure taps located at various elevations along the rod bundle 

providing measurements to calculate single phase flow heater rod bundle and grid friction 

losses, bundle mass inventory, and void fraction. The spans of these taps are listed in Table 

2-1. These pressure taps can also be seen on the right-hand-side of the rod bundle test section 

in the Figure 2-22, with each connected to a sensitive differential pressure cell. Sixteen of these 

differential pressure cells measure the pressure drop over spans of only 76.2 to 127 mm (3 to 5 

in), which provides an accurate and detailed estimate of void fraction in the froth region in the 

bundle. The other differential pressure cells span ranges up to 304.8 mm (12 in.). In addition, 

heater rod and housing wall thermocouples are placed at these pressure tap mid spans 

locations to determine convective and radiant heat transfer coefficients in the froth region where 

the differential pressure cells will give the average void fraction.
41

Figure 2-31 Instrumental Heater Rod Radial Location

The flow housing has six pairs of windows at the following elevations: 61.4 cm (37.2 in), 114 cm 

(44.7 in), 166 cm (65.3 in), 218 cm (85.8 in), 270 cm (106.4 in) and 322 cm (126.9 in). Each 

pair of windows are 180 degrees apart. The window lenses are made from optical grade fused 

quartz and provide a viewing area of about 10.2 cm (4 in) below and 15.2 cm (6 in) above the 

grid number two to seven. The windows are preheated to prevent wetting during the time when 

dispersed flow is occurring and LCDS measurements are being made using infrared heaters on 

each window and by pulsing the heater rod bundle when preheating the flow housing walls.

The four corner support rods are unheated, they are used to support the bundle grids and to 

route the grid and steam probes thermocouple leads going out of the bundle. These rods are 

instrumented with eight (8) thermocouples attached at various elevations corresponding to 

heater rods and housing wall thermocouples. The purpose of this arrangement is to quantify 

radiation heat transfer losses to unheated surfaces and determine their behavior during tests. 

The DC power supply can be controlled by regulating the voltage, current, or total power output. 

The voltage drop across the heater rod bundle is measured by a voltmeter connected to voltage 

taps at the Low-Melt pot and the Nickel Ground Plate. The electrical current is measured by a 

copper shunt calibrated for 15,000 amps proportional to an output signal of 0-50 millivolts.
42

Table 2-1 Differential Pressure Cell Spans Along Bundle (from bottom of heated length)

The Lower Plenum is instrumented with two fluid thermocouples and two wall thermocouples. 

The fluid thermocouples monitor the injection water temperature prior and during testing. The 

wall thermocouples measure the vessel wall temperature during heat-up and testing. One of 

the wall thermocouples in conjunction with a temperature controller regulates electrical power to 

clamp-on-heater rods to maintain the vessel wall at inlet temperatures.

The Upper Plenum is also instrumented with two fluid thermocouples and two wall 

thermocouples. The fluid thermocouples measure steam and carryover liquid during testing. 

The wall thermocouples monitor vessel wall temperatures during heat-up and testing. The 

Upper Plenum is also instrumented with a static pressure transmitter which measures and 

controls the test section pressure during testing.

Differential 

Pressure Cell Span (mm) Span (in.)

1 0-3658 0-144

2 0-330 0-13

3 330-635 13-25

4 635-940 25-37

5 940-1092 37-43

6 1092-1168 43-46

7 1168-1346 46-53

8 1346-1448 53-57

9 1448-1524 57-60

10 1524-1600 60-63

11 1600-1702 63-67

12 1702-1829 67-72

13 1829-1905 72-75

14 1905-1981 75-78

15 1981-2057 78-81

16 2057-2159 81-85

17 2159-2362 85-93

18 2362-2464 93-97

19 2464-2540 97-100

20 2540-2743 100-108

21 2743-3048 108-120

22 3048-3378 120-133

23 3378-3658 133-144
43

Figure 2-32 Traversing Steam Probe Rake Schematic

2.3.3 Data Acquisition System

The control and data acquisition system provides control functions and data collection functions 

for RBHT Test Facility. This system consists of two parts, the computer and display terminals 

residing in the control room and the VXI mainframe and terminal panels residing in the test 

facility. The two parts are connected via an industry standard IEEE 1394 (Firewire) serial 

control and data interface.

The computer provides the display, control, and data storage functions. It has the capability of 

displaying control function set points and process variables, and critical operating parameters 

during tests, along with selected variable such as various rod temperatures displayed in realtimes during the experiment. This system will provide dial, meter, and strip-chart functions as 

required. The computer collects and saves data from the various instruments, such as voltage, 

current, pressure, level, flow and temperature; and provides control functions such as heater rod 

power, injection water pressure, upper and low plenum temperatures, etc.
44

The instrumentation part of this system which residing in the test facility, consists of an industry 

standard VXI mainframe (Vme bus with extensions for Instrumentation) from Hewlett-Packard 

(HP-E8401AA), and a set of terminal panels (HP E1586A). The VXI mainframe contains a 

firewire controller card (HPE8491A) and seven state-of-the art data acquisition and control 

cards (HP E1419A). The terminal panels provide the isothermal reference junctions needed for 

the thermocouples, as well as the voltage and current-loop input/output (i/o) interface to the 

RBHT Test Facility. These terminal panels are connected to the HP E1419A cards with SCSI 

cables. Seven cards yield a capability of 448 I/O channels. The VXI mainframe can hold up to 

twelve cards, and the firewire interface can support up to sixteen mainframes.

Each E1419A card can support up to eight signal conditioning plug-ins (scp’s), conditioning 

eight channels each. Each E1509A scp contains low-pass anti-aliasing filters, fixed at 7 Hz. 

Because of this, the scan rate for each channel must be greater than or equal to the Nyquist 

rate of 14 Hz. The maximum a/d conversion rate on each HP E1419A card is nominally 

100kHz, but is controlled to rate the user requires. The seven cards can be synchronized to 

perform the scans simultaneously. The theoretical maximum scan rate for each channel (on 

any individual card) is 100,000/64 = 1,562.5 Hz, if all 64 channels are scanned. (Note, the 

actual scan rate would be less because of multiplexer switching, amplifier settling times due to 

gain changes, etc. There are different scp’s available from HP providing different filter values to 

scan at these rates.) The normal data-scanning rate will be 2 Hz during the majority of the 

tests, but this rate can be increased to 10 Hz for specific times during testing.
45

3. CALCULATIONAL METHODS USED FOR THE RBHT TWO-PHASE

MIXTURE LEVEL AND UNCOVERY EXPERIMENTS

3.1 Introduction

The pressure drop data for the two-phase mixture level swell and uncovery experiments were 

analyzed to derive the axial void distribution along the bundle for different experimental 

conditions. The Bundle Energy Balance computer program described later in the chapter was 

used to reduce and analyze the experimental data. The analysis program was used to correct 

the measured pressure drop for two-phase friction and acceleration losses such that the void 

distribution could be calculated. 

3.2 Analyzed RBHT Experiments

All experiments were analyzed using the Bundle Energy Balance computer program, but a 

selected few of the experiments are presented here for comparisons. The test conditions for the 

selected experiments are presented below in Table 3-1. 

Table 3-1 Test Conditions for the Analyzed RBHT Experiments

Experiment 1678/79 will be treated as the base case for all comparisons as it provides a test 

that can compare individual parametric changes between all other experiments which are 

discussed here. Experiments 1678 and 1679 are combined to represent the base case as they 

were performed on the same testing day, and the data for experiment 1679 is a continuation of 

experiment 1678. The final test conditions that were to be performed under the 1678 name

were completed using the name experiment 1679 as a result of a necessary data acquisition 

system restart.

The effects of increasing pressure will be studied in comparisons with experiments 1678/79, 

1651 and 1659. Studies on the effect of increasing the power will be studied through 

comparisons with experiment 1582 and experiment 1678/79. Experiment 1566 will be 

compared to experiment 1678/79 to study the result of increasing the inlet temperature, as the 

inlet subcooling is 11.1 degrees K (20 degrees F) for experiment 1566 compared to the 55.6 

degrees K (100 degrees F) used in the other experiments. The remaining experiments 1570 

EXP # Pressure 

MPa (psia)

Inlet Temperature 

K (o

F)

Inlet Subcooling 

K (o

F)

Power 

(kW)

1566 0.1379 (20) 370.4 (207) 11.1 (20) 72

1570 0.1379 (20) 370.4 (207) 11.1 (20) 144

1582 0.1379 (20) 326.5 (128) 55.6 (100) 144

1651 0.2758 (40) 348.2 (167) 55.6 (100) 72

1659 0.4137 (60) 362.6 (193) 55.6 (100) 72

1678/79 0.1379 (20) 326.5 (128) 55.6 (100) 72

1683 0.2758 (40) 348.2 (167) 55.6 (100) 144
46

and 1683 will be compared with experiment 1678/79 in order to determine the effects of 

changing multiple conditions. Experiments 1570 and 1678/79 compare the effects of 

decreasing the inlet subcooling and increasing the power, while experiments 1683 and 1678/79 

will be used to study the result of increasing both the pressure and the power.

The uncorrected void fraction plots from the data as a function of elevation are shown in Figure 

3-1 for the base case.

Figure 3-1 Axial Void Fraction Plot for Uncorrected RBHT Data

As can be seen from Figure 3-1, the void fraction begins to increase at lower elevations with 

decreased flow rates as boiling begins lower in the bundle and increase vapor flow is generated. 

The void fraction does not increase in a monotonic fashion but shows dips and spikes. As will 

be discussed, the spacer grids are a contributing factor in the irregular behavior of the void 

distribution.

The measured level within the various spans of the differential pressure cells are divided by the 

full length of the spans and subtracted from one to obtain an estimate of the uncorrected local 

void fraction. The uncorrected void fractions must be corrected for losses due to friction and 

acceleration. When the differential pressure cell spans a spacer grid location, the grid effects 

must also be accounted for. In addition, there are also temperature and density corrections that 

are necessary for the differential pressure cell readings. The differential pressure cells are 

initially calibrated by filling the entire bundle with water at standard temperature and pressure 

conditions. This results in the test readings to be slightly lower because of the density 

Axial Void Fraction Plot

Exp. 1678/79 - 0.1379 MPa (20 psi) - 55.6 K (100 o

F) Subcooling - 0.66 kW/m (0.2 kW/ft)

(Various Flow Rates with units of mm/s (in/s))

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

30.48 (1.2) 25.4 (1.0) 20.32 (0.8)

15.24 (0.6) 10.16 (0.4) 5.08 (0.2)

3.81 (0.15)
47

difference between the reference conditions and the test conditions. In order to correct for this 

difference, the pressure drop measurements are corrected by multiplying the reference density 

divided by the experiment density. This correction would become a very tedious process since 

the density is a function of temperature, which is changing as flow progresses upward through 

the bundle. Since the correction is small, to simplify this correction, an average temperature 

over the length of the bundle is utilized to correct all differential pressure cell measurements, 

relative to the reference conditions.

3.3 ENERGY BALANCE Program

The use of a cross-sectional averaged energy balance allows calculation of the bundle single 

and two-phase conditions. The parameters that were calculated included bundle average 

quality, the flow rates of both the liquid and vapor, and the mixture Reynolds number, density, 

and velocity. 

3.3.1 Bundle Energy Balance Computer Code Background

The user interactive computer program STEAM INTERACT was obtained to provide ASME 

steam table properties for the various calculations that are used in the Bundle Energy Balance 

code. At the time this program was first obtained, it was modified in the year 2002 by John 

Burkardt [1]. The program and modifications made by Burkardt are based on the referenced 

work of Lester Haar, John Gallagher, and George Kell [2] and the work of C. A. Meyer, R. B. 

McClintock, G. J. Silvestri, and R. C. Spencer [3]. The referenced work of Haar, Gallagher, and 

Kell centered on the NBS/NRC steam tables and developing computer programs for providing 

the properties of both vapor and liquid states of water. The work by Meyer et al. was in 

developing the ASME steam table properties. The input and resulting output were all in metric 

units. The program code was modified for this project by D. J. Miller [4] to accept inputs that are 

in British units and to provide both metric and British units for all calculated output values.

Some of the desired steam table properties were not included in the original STEAM INTERACT 

program. These included the values of the liquid and vapor phase enthalpies, densities, and 

viscosities. In order to have the code also calculate these quantities, the property calculations 

subroutine from the computer program PWRDNB [5] was incorporated into the subroutines of 

STEAM INTERACT. The combination of the two programs’ calculated properties provides the 

necessary values for all further calculations.

3.3.2 Bundle Energy Balance Computer Code Equations and Derivations

The modified steam interact code provides the user with the vapor and liquid properties for the 

provided pressure and temperature. Thus the remaining test conditions that are required from 

the user are the inlet mass flow rate (lbm/sec) and the bundle power (kW). With these four 

given conditions and the resulting steam table properties, a cross-sectional averaged energy 

balance can be used to calculate the saturation line and the local average quality axially in the 

rod bundle. From the calculation of the local quality, several other values can be calculated. 

The derivations for calculating the quality and other values are presented below, based on the 

equations from Collier and Thome [6].
48

The derivation of the equation for the mixture quality comes from first determining the location of 

the saturation line. This can be found from the energy balance equation

(3-1)

where the nomenclature for the terms in this and all following equations have been provided in 

the abbreviations section at the beginning of this report. The vapor generation due to fluid 

flashing caused by the pressure drop in the bundle was found to be negligible compared to the 

vapor generation due to heating. This is shown in Appendix B.

A more detailed explanation of assumptions and resulting derivations were conducted by Miller 

[4], which results in the final expression

(3-2) 

As discussed earlier, the bundle axial shape is skewed towards the top of the bundle as a 

triangular profile. The integration of the right-hand-side (RHS) requires the inclusion of the 

equations for the peak-to-average power ratio equation for the respective elevations of interest. 

The expressions for the power factor for the upper and lower portions of the rod bundle with 9 ft 

(2.74 m) elevation being the location of unity for each are given as

(3-3) 

One can now apply the integral on the RHS of the expression to determine the elevation of the 

saturation line, such that

(3-4) 

this gives

(3-5) 

or

(3-6) 

and the final simplified expression becomes

(3-7) 

mdh q z dz  = '( )

1 '( ) sat

in

z

f in z h h q z dz

m − = ∫ 

0.5, for elevations 9 feet

9 PF=

4.5, for elevations 9 feet 3

z

z

 + ≤ 



− + ≥ 

( ) ' 0.5

9

sat

in

z

in z

q z h z h dz

m

  −= +     ∫ 

( )

2

0.5

' 18

sat

in

z

f in

z

m z h h z

q

 

− =+    



( )

2 2

0.5

' 18

in sat

f in sat

m z z

h h z

q

 

− =+ −    



0

0.5

18 in + z

0

( )

2

0.5

' 18

sat

f in sat

m z h h z

q

 

− =+    


49

This equation can now be rearranged to obtain a new expression, using interpolation, which 

calculates the elevation of the saturation line, as shown below

(3-8) 

giving

(3-9) 

where an initial guess for zsat is entered into the RHS to calculate a new value for zsat on the 

LHS. Through interpolation then one can determine the elevation of the saturation line.

The remaining local qualities along the rod bundle can now be calculated, since all other 

unknown values have thus been determined. The flow quality below the saturation line is 

known to be zero, so above the saturation line the quality is calculated as

(3-10) 

The expressions for the power factor must be used for the appropriate elevations along the rod 

bundle. For the elevations up to the 9 ft (2.74 m) elevation, the equation becomes

(3-11) 

while the equation for elevations above 9 ft is

(3-12) 

Applying the integrals in these equations, they respectively become

(3-13) 

and

(3-14) 

If there are cases in which the flow quality was calculated to be greater than 1.0, the computer 

code will force the quality to a value of 1.0. This is similar to what was done for the elevations 

below the saturation line where the quality was calculated to be less than 0.0, which required 

the code to force the value to 0.0.

( ) 0.5

' 18

sat

f in sat

m z h h z

q

  − =+    



( ) '

0.5

18

f in

sat

sat

m h h

q z

z

−

=   +    



( ) sat xz x − 0 1 '( ) sat

z

z fg

q z dz mh = ∫ 

( ) ' 0.5 sat 9

z

z T fg

q z x z dz

m h

  =   +   ∫ 

@ 9ft. 9

' 4.5

3

z

T fg

q z x x dz

m h

  − = −+     ∫ 

2 2 ' 0.5 0.5

18 18

sat

sat

fg

q z z

x zz

mh

       

= +−+               

( )

2 2

@ 9ft.

' 9 4.5 4.5 9

fg 6 6

q z x x z

mh

      

= + − + −− +             
50

Once the rod bundle average quality has been determined, the other desired values can be 

calculated as a function of the quality. The liquid and vapor mass flow rates are found using the 

expressions

(3-15) 

and

(3-16) 

Calculation of the mixture Reynolds number can be performed by using the following expression

(3-17) 

The terms in the mixture Reynolds number expression will now be examined on an individual 

basis. First, can be determined from the quality as

 (3-18) 

In a similar manner from Collier [6], the expression for can also be found from the quality 

as

(3-19) 

The remaining term, is derived in the following manner by Dougall [7] as

(3-20) 

where and . If one substitutes these expressions back into the original 

equation for the mixture velocity, then one obtains the expression

. (3-21) 

Recalling the expressions for the liquid and vapor phase mass flows, one can rewrite the 

previous equation to obtain the following form as

(3-22) 

(1 ) mm x   f T = −

m mx   g T =

Re mix mix H

mix

mix

ρ V D

μ =

ρ mix

(1 ) mix f g ρ ρρ =− + x x

1

μ mix

1 1

mix f g

x x

μ μμ

− = +

Vmix

f g

mix

T

Q Q V

A

+ =

f

f

f

m

Q

ρ =  g

g

g

m

Q

ρ = 

1 f g

mix

Tf g

m m

V

A ρ ρ

 

= +  

 

 

( ) 1 ( ) ( ) T

mix

Tf g

m xz xz

V z

A ρ ρ

  − =   +

 


51

3.3.3 Superficial Phase Velocity

Knowledge of the flow regime is very important for developing more realistic two-phase flow 

models. Two-phase flow models are the starting point for selecting the constitutive relationships 

between the phases. These relationships include interfacial drag, interfacial heat and mass 

transfer, wall drag for each phase, wall heat transfer for each phase, and the steadiness of the 

flow. The mass velocity is expressed as the mass flow divided by the flow area given as

(3-23) 

The form of the liquid superficial velocity is then given as

(3-24) 

and the vapor superficial velocity is represented as

(3-25) 

3.3.4 Pressure Drop Correlations and Models

The energy balance program was used to estimate the frictional pressure drop and acceleration 

pressure drop components. By calculating these components and subtracting them from the 

total pressure drop, a more accurate estimate of the elevation head and void fraction can be 

made. In analyzing the raw data from the RBHT facility, the measured pressure drops are 

obtained in units of inches of water. These values along with the given test conditions and the 

previously calculated qualities in the program provide a starting point for correcting the data.

First, the experimental pressure drop values are converted to the more standard units of pounds 

per square feet. This is completed using the following conversion formula

(3-26) 

Three pressure drop models were used to correct the data for the two-phase friction. The 

models were the homogeneous model, the homogeneous two-phase multiplier model, and the 

Friedel [9] model.

W G

A =

( ) 1

f

f

G x

j

ρ

− =

g

g

Gx j

ρ =

[ ] ∆

∆

P

lb

ft

g P inchesH

g

f STP

c

exp

exp

2

 2 0



 



 = ρ
52

Comparing the frictional pressure drop terms for each model, the frictional term in the 

homogeneous model is written as the following

(3-27) 

where fTP is the two-phase friction factor and can be assumed to have a value of 0.005 based 

on the data by Wallis [10]. The specific volume for each span is calculated in the following 

manner

(3-28) 

It should also be noted that the second term within the brackets is only calculated when twophase flow exists, therefore when the quality is greater than zero.

For the homogeneous two-phase multiplier model, the two-phase multiplier can be defined as

(3-29) 

The frictional pressure drop term becomes

(3-30) 

where

(3-31) 

when the flow is laminar, and for turbulent flow, the expression for becomes

(3-32) 

The frictional pressure drop term for the Friedel model [9] is given below as

(3-33) 

( ) homogeneous

2 2 2

1

1

2 4 ''

2

TP fg i i

fric i i i

e c e fg

f G q z z P z z

D g D Gh

ν

ν +

+

    − ∆ = −+        

v x i f i fg = + ν ν

φ

ν

ν

μ

μ fo

span

average

fg

f

span

average

fg

g

x x

2

1

4

= + 1 1





















+





















( ) 2

2

2

1

2 o f

fric i i fo

e c

f G P z z

D g φ

ν

+ φ

 

∆= −      

f o = 16

Re

of

f

GD o

e

f

=

















0 079

1

4

.

μ

( ) Freidel

2

2

1

2

Freidel

o f

fric i i fo

e c

f G P z z

D g

ν

+ φ

 

∆= −      
53

where the two-phase multiplier is defined in the following manner

(3-34)

The various terms in Equation 3-34 are defined further below

(3-35)

where

(3-36)

and

(3-37)

The remaining terms are defined as follows

(3-38)

(3-39)

(3-40)

and

(3-41)

where

(3-42)

The remaining pressure drop terms to be defined are the losses due to acceleration and gravity. 

First, the acceleration loss for homogeneous flow for each span can be expressed as

φ fo A

A A

Fr We

2

1

2 3

0 045 0 035

324 = + .

. .

A x x

f

f span

avg

span

avg

f go

g fo

1

2 2 = 1− +















 ( ) ρ

ρ

1

4

0.079

fo

e

f

f

GD

μ

=

       

1

4

0.079

go

e

g

f

GD

μ

=

       

A x x span

avg

span

avg

2

0 78

0 224

= 1− 



 



 .

.

A f

g

g

f

g

f

3

0 91 0 19 0 7

= 1































 − 















ρ

ρ

μ

μ

μ

μ

. . .

Fr

G

gDe

=

2

2

ρ

We

G De =

2

ρσ

1

1 span span

avg avg

f span fg

avg g f

x x

ν νν x

ρ ρ ρ

  −     = + =+ =
54

(3-43) 

It can be assumed that there are no acceleration losses until the quality is greater than zero and 

the two-phase region begins. If this assumption is made, then the following holds true when the 

wetted and heated perimeters are equal.

(3-44) 

Rearranging Equation 3-44 gives

(3-45) 

Substituting Equation 3-45 into Equation 3-43 gives the final form of the acceleration pressure 

drop term as

(3-46) 

The elevation pressure drop term can now be obtained for the differential pressure cells which 

do not contain a spacer grid. This is completed by subtracting out the frictional and acceleration 

terms from the experimental pressure drop data as shown below

(3-47) 

The elevation pressure drop term can be used to calculate the collapsed liquid level within each 

differential pressure cell span as

 (3-48) 

Using this calculated liquid level and the actual span length of the respective differential 

pressure cell, the void fraction can be calculated as

(3-49) 

The previous calculations provide the void fractions and elevation losses for the cells that do not 

contain spacer grids. If the average void fraction of the two neighboring cells is used to 

represent the void fraction within the remaining cells that contain spacer grids, then the 

elevation pressure drop losses can be calculated for these remaining cells. The elevation 

pressure drop term for the cells contain spacer grids can be written as

( ) 1

4 '' fg

accel i i

c e fg

G q P zz

gDh

ν

∆= − +

1 1 ( ) 4 '' i i i i

e fg

q xx zz

GD h + + −= −

( ) ( ) 1

1 4 ''

i i e fg

i i

x x GD h

z z

q

+

+

− − =

( )

2

1

fg

accel i i

c

G

P xx

g

ν

∆= − +

∆ =∆ −∆ −∆ P PPP elev exp fric accel

z

P g

g calc

elev c

STP

= ∆

ρ

α = − 1

z

z

calc

actual
55

(3-50) 

where

(3-51) 

The elevation pressure drop and the previous values for the frictional and acceleration 

components can now be used to determine the losses due to the spacer grids in the 

corresponding cells as

(3-52) 

3.3.5 Axial Void Fraction

In review, the different methods used to correct the pressure drop data to derive the local void 

fraction distribution include using the homogeneous two-phase friction model [6], the Freidel 

two-phase friction model [9], and the homogeneous model acceleration pressure drop model. 

The homogeneous acceleration pressure drop model was used since it is only a function of the 

flow quality and properties, whereas, the separated flow acceleration pressure drop is a function 

of both the void (which is what we are solving for) and the quality [6]. Therefore, the 

homogeneous acceleration calculation is much more straight forward and does not require an 

iteration.

( )

∆ P

g z z

g elev

span

avg

i i

c

=

− ρ +1

ρspan αρ ( ) α ρ

avg

g f = + − 1

∆ =∆ −∆ −∆ −∆ P PPP P grid exp fric accel elev
56

Figure 3-2 Comparison of Corrected and Uncorrected Differential Pressure Cell Data, with 

Different Frictional Models

Figure 3-2 shows the effects of the different frictional corrections on the uncorrected void 

fraction data. Both corrections used the homogeneous acceleration correction term. As the 

figure indicates, there is a small difference between the two different friction corrections, and the 

effects of both the frictional and acceleration corrections are small, causing less than a 5

percent change in the calculated void fraction. This means that the measured pressure drop in 

the experiment is dominated by the elevation head. Since the Freidel model is currently claimed 

to be the most accurate two-phase frictional model [6], it was chosen to correct all the measured 

pressure drop data. Additionally from Figure 3-2, the effects of the spacer grids are observed 

as large dips can be observed in the uncorrected data around the spacer grid locations.

Axial Void Fraction Plot

Exp. 1678/79 - 0.1379 MPa (20 psi) - 55.6 K (100 o

F) Subcooling

- 0.66 kW/m (0.2 kW/ft) - 15.24 mm/s (0.6 in/s)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140 Length (in)

Uncorrected

Corrected Freidel

Corrected Homogeneous

Corrected Homogeneous Two-Phase 
57

Figure 3-3 Axial Void Fraction Plot for Corrected RBHT Data

Plots of void fraction versus bundle height were expected to be smooth, but this is not seen in 

Figure 3-3. The void fraction appears to reach local maximums at elevations of 1.753 and 2.235 

m (69 and 88 in). These locations are within differential pressure cells that are immediately 

below the location of a spacer grid. The effects of this close proximity to the neighboring grid 

spacers, such as the potential turning of the flow or stagnation of the flow, could be resulting in 

biased readings across those differential pressure spans. If the spans containing the spacer 

grids and the lower neighboring differential pressure cells are removed from the data, the void 

fraction plots become much smoother as a function of height as seen in Figure 3-4. 

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Homogeneous Model

Homogeneous TP Mult. Model

Freidel Model
58

Figure 3-4 Corrected Axial Void Fraction Plot Smoothed Over Rod Bundle Length

Figure 3-4 shows the effects of the different friction corrections on the smoothed data. Again, 

the corrections are small indicating that the pressure drop is dominated by the elevation head, 

not the friction or acceleration pressure drops.

A sample input deck and resulting output are provided below in Figure 3-5 and Figure 3-6, 

respectively.

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Homogeneous Model

Homogeneous TP Mult. Model

Freidel Model
59

Figure 3-5 Sample Input Deck for ENERGY BALANCE Program

20 !Pressure (psia)

128 !Inlet Temp (Degrees F) 

1 !Properties Output Flag (1 = Yes) 

72 !Power (kW) 

.1069 !Mass Flow Rate (lbm/sec)

12.852200 !DP Cell Level 0-13 elev. (in. of H2O)

11.709300 !DP Cell Level 13-25 elev. (in. of H2O) 

11.600100 !DP Cell Level 25-37 elev. (in. of H2O) 

5.230900 !DP Cell Level 37-43 elev. (in. of H2O) 

2.058900 !DP Cell Level 43-46 elev. (in. of H2O) 

5.241400 !DP Cell Level 46-53 elev. (in. of H2O) 

2.578400 !DP Cell Level 53-57 elev. (in. of H2O) 

1.877000 !DP Cell Level 57-60 elev. (in. of H2O) 

1.774800 !DP Cell Level 60-63 elev. (in. of H2O) 

1.643500 !DP Cell Level 63-67 elev. (in. of H2O) 

3.032600 !DP Cell Level 67-72 elev. (in. of H2O) 

1.564200 !DP Cell Level 72-75 elev. (in. of H2O) 

1.441600 !DP Cell Level 75-78 elev. (in. of H2O) 

1.588100 !DP Cell Level 78-81 elev. (in. of H2O) 

1.164900 !DP Cell Level 81-85 elev. (in. of H2O) 

4.329500 !DP Cell Level 85-93 elev. (in. of H2O) 

1.462000 !DP Cell Level 93-97 elev. (in. of H2O) 

1.096300 !DP Cell Level 97-100 elev. (in. of H2O) 

2.108900 !DP Cell Level 100-108 elev. (in. of H2O) 

4.220600 !DP Cell Level 108-120 elev. (in. of H2O) 

3.344200 !DP Cell Level 120-133 elev. (in. of H2O) 

2.332700 !DP Cell Level 133-144 elev. (in. of H2O) 
60

Figure 3-6 Sample Output for ENERGY BALANCE Program
61

Figure 3-6 Sample Output for ENERGY BALANCE Program, Continued
62

Figure 3-6 Sample Output for ENERGY BALANCE Program, Continued
63

Figure 3-6 Sample Output for ENERGY BALANCE Program, Continued
64

3.4 Experimental Data Comparisons

The RBHT experiments compared the effects of changing parameters such as pressure, inlet 

subcooling, flow rate, and power. These comparisons will be presented in the following sections 

and figures. Additional figures of the experiments and individual test “windows” are provided in 

Appendix A. Several of the experiments will be compared in this section using Experiment 

1678/79 as a base case for comparisons. The conditions for this case are the following: 

pressure is 0.1379 MPa (20 psia), flow rate is 15.24 mm/s (0.6 in/s), power is 72 kW, and inlet 

subcooling is 55.6 deg K (100 deg F). The effects of changing the flow rate were shown in 

Figure 3-1. The elevation at which boiling occurs will decrease as the flow is decreased, and 

increase to higher elevations as the flow is increased. This is expected as the lower flow rates 

will result in uncovery at the upper elevations of the rod bundle, and rod heat up will occur.

The interface between the two-phase mixture level and the single phase vapor flow can be 

plotted to see that the elevation at which this interface occurs will move as the flow is decreased 

or maintained at a low rate for an extended period of time. This is shown in Figure 3-7, where 

the interface is initially observed to be at the exit of the rod bundle, but falls to an elevation of 

approximately 2.972 m (117 in) within 300 sec as the flow is decreased from 15.24 to 10.16 

mm/s (0.6 to 0.4 in/s).

Figure 3-7 Single Phase Vapor and Two-Phase Flow Interface versus Experimental Time

Similarly, this interface movement can be seen in the temperature plots of the heater rods at 

various elevations. The heater rod temperatures will begin to rise rapidly as the two-phase 

Exp. 1683 - 0.2758 Mpa (40 psi) - 55.6 K (100 oF) Subcooling - 1.32 kW/m (0.4 

kW/ft)

(Raw Data)

2.8

2.9

3

3.1

3.2

3.3

3.4

3.5

3.6

3.7

4350 4400 4450 4500 4550 4600 4650 4700 4750

Elapsed Time (s)

Elevation (m)

110.2

115.2

120.2

125.2

130.2

135.2

140.2

145.2

Elevation (in.)

Single Phase 

Vapor Flow

Two Phase 

Mixture Flow
65

mixture level drops below the elevation of each thermocouple. Figure 3-8 shows that the twophase mixture level drops below an elevation of 3.607 m (142 in) around 4400 seconds in the 

experiment, as the flow is being reduced from 15.24 to 10.16 mm/s (0.6 to 0.4 in/s). The single 

phase vapor flow that continues to pass this elevation is not sufficient to properly cool the heater 

rods and thus the temperature is observed to continue to rise until it reaches the scram 

temperature around 700 degrees K (800 degrees F).

Figure 3-8 Heater Rod Temperatures at an Elevation of Approximately 3.607 m (142 in.)

In Figure 3-9, a lower elevation is used to show the fluctuations that occur at the interface 

between the two-phase mixture and the single phase vapor flow. The interface is continuously 

falling and rising as the vapor bubbles flow upward and exit from the liquid flow. The liquid flow 

is also oscillating, and the heater rod temperatures are observed to fluctuate as the interface 

begins to fall to a lower elevation. In both figures, it is observed that while the two-phase 

mixture level is sufficiently high, nucleate boiling is occurring in the lower elevations and the 

temperatures are held constant. 

Nucleate 

Boiling

Single Phase 

Vapor
66

Figure 3-9 Heater Rod Temperatures at an Elevation of Approximately 3.073 m (121 in.)

In each of the previous three figures, the interface between the two-phase mixture and the 

single phase vapor is observed to fall as the flow was decreased to a very low flow rate. For the 

experiments discussed in this report, the lowest flow rates that were achieved in each 

experiment are presented below in Table 3-2. The minimum flow rate achieved is observed to 

decrease as the power and inlet temperature are reduced. This is expected as the decreased 

power will produce less heat for the coolant to remove, and the lower inlet temperature provides 

additional cooling and thus allows for more heat removal.

It also appears that a decrease in pressure will allow lower flow rates to be achieved in the 

experiment, since the two-phase mixture will swell to a greater height at lower pressure. This 

can be observed by comparing the minimum flow rates for all of the experiments. As pressure 

increases the mass flow rate which corresponds to the designated flow rate will decrease. The 

values in Table 3-2 show this when comparing experiments 1651 and 1659. The flow rate is 

stated to be 5.08 mm/s (0.2 in/s), but the corresponding mass flow rate decreases from 0.02395 

to 0.02372 kg/s (0.0528 to 0.0523 lb/s) as the pressure is increased from 0.2758 to 0.4137 MPa 

(40 to 60 psia). The decrease in the mass flow rate will result in the coolant flow being less 

effective at removing heat. However, increasing pressure is known to suppress boiling and as 

is shown in the following figures, the void fraction will be lower at higher pressures. The lowest 

flow rate of 3.81 mm/s (0.15 in/s) is achieved for the 0.1379 MPa (20 psia) case, Experiment 

1678/79. This lower flow rate was not achieved for the higher pressure cases, as a result of the 

mass flow rates being lower than the minimum mass flow rate that could be controlled 

accurately by the inlet flow meter.

Nucleate 

Boiling

Single Phase 

Vapor

Fluctuating Two 

Phase Mixture Level
67

Table 3-2 Minimum Achieved Flow Rates for Various Experimental Conditions

3.5 Void Fraction versus Elevation Data Comparisons

One way in which the effects of changing experimental conditions can be observed is by 

comparing the void fraction distributions along the length of the rod bundle. The effects of 

increasing pressure can be seen further in Figure 3-10, where the corrected experimental data 

for Experiments 1651, 1659, and 1678/79 are presented for comparisons. The increased 

pressure suppresses boiling and thus results in the void fraction being slightly lower. In Figure 

3-10, a 0.1379 MPa (20 psi) increase in pressure appears to lower the void fraction by 

approximately 10 percent. 

EXP # Pressure, 

MPa (psia)

Inlet 

Temperature, 

K (o

F)

Inlet 

Subcooling, 

K (o

F)

Power, 

kW

Flow Rate, 

mm/s (in/s)

Mass Flow Rate, 

kg/s (lbm/s)

1566 0.1379 (20) 370.4 (207) 11.1 (20) 72 5.08 (0.2) 0.025 (0.055)

1570 0.1379 (20) 370.4 (207) 11.1 (20) 144 15.24 (0.6) 0.0744 (0.164)

1582 0.1379 (20) 326.5 (128) 55.6 (100) 144 10.16 (0.4) 0.0485 (0.1069)

1651 0.2758 (40) 348.2 (167) 55.6 (100) 72 5.08 (0.2) 0.0239 (0.0528)

1659 0.4137 (60) 362.6 (193) 55.6 (100) 72 5.08 (0.2) 0.0237 (0.0523)

1678/79 0.1379 (20) 326.5 (128) 55.6 (100) 72 3.81 (0.15) 0.0182 (0.0401)

1683 0.2758 (40) 348.2 (167) 55.6 (100) 144 10.16 (0.4) 0.0479 (0.1057)
68

Figure 3-10 Comparisons of Experimental Data at Various Pressures with Flow Rate at 15.24 

mm/s (0.6 in/s)

Similarly, comparisons can be made between Experiments 1678/79 and 1582 and between 

Experiments 1651 and 1683 for studying the effects of increasing power as shown in Figure 

3-11. The void fraction plots between each of these comparisons show that the void fraction 

greatly increases throughout the bundle and thus lowers the elevation at which the saturation 

line is located. As was seen in the previous plots for increased pressure, the experiments at 

0.2758 MPa (40 psia) are slightly below the cases at 0.1379 MPa (20 psia) due to the higher 

pressure which reduces the phase slip and thereby reduces the void fraction. The effect of 

increasing both power and pressure indicates that the change in power has a greater effect than 

the change in pressure. The void fractions at the exit of the bundle for the two higher power 

cases are much closer to one as compared to the void fractions for the lower power cases. 

Additionally, the 0.2758 MPa (40 psia) case at the higher power results in a void fraction that is 

approximately 0.3 greater than at the lower power. In comparison, the two 0.1379 MPa (20 

psia) tests show an increase of void fraction of about 0.2.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Exp. 1678/79 (0.1379 MPa (20 psia))

Exp. 1651 (0.2758 MPa (40 psia))

Exp. 1659 (0.4137 MPa (60 psia))
69

Figure 3-11 Comparison of Experimental Data for Various Powers and Pressures with Flow Rate 

at 15.24 mm/s (0.6 in/s)

Figure 3-12 shows another comparison for four of the experiments listed in Table 3-2. 

Comparisons of the void fraction distribution in the bundle between Experiment 1678/79 and 

Experiment 1566 provide details on the effects of decreasing the amount of subcooling for the 

inlet flow. One observation that can be made is that the effect of decreasing the subcooling 

results in the saturation line being located at lower elevations. However, this does not result in 

the void fraction increasing rapidly along the bundle length. Instead, the decreased subcooling 

appears to result in a smoother trend in the void fraction distribution along the rod bundle length.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Exp. 1678/79 (0.1379 MPa (20 psia) & 72 kW)

Exp. 1651 (0.2758 MPa (40 psia) & 72 kW)

Exp. 1582 (0.1379 MPa (20 psia) & 144 kW)

Exp. 1683 (0.2758 MPa (40 psia) & 144 kW)
70

Figure 3-12 Comparison of Experimental Data for Various Powers, Pressures, and Inlet 

Subcooling with Flow Rate at 15.24 mm/s (0.6 in/s)

Also included in Figure 3-12 are comparisons between Experiment 1678/79 and experiments 

1582 and 1570. These additional comparisons provide information as to the effects of 

increasing the power and for increasing the power while decreasing the inlet flow subcooling. 

As was observed in Figure 3-11, the increase in power results in a lower saturation line and thus 

a greater void fraction at the exit of the bundle. Similarly, decreasing the inlet subcooling results 

in reaching the saturation point farther down in the heated length of the rod bundle. However, 

when one compares the two higher power experiments (Experiments 1570 and 1582), it is 

observed that the void fractions near the exit of the bundle for the two cases appear to become 

approximately equal. For these void fractions to be equivalent, the coolant flow appears to be 

sufficient such that the void and the rod temperature are maintained near constant at the exit. 

3.6 Void Fraction versus Quality Data Comparisons

In many cases, more information can be obtained by plotting void fraction versus quality. The 

following figures compare the void fraction versus quality plots for the three experiments 

currently being analyzed. Figure 3-13 shows that for these experiments approximately the 

same quality is observed, but the void fraction is greatest for the lower pressure case.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Exp. 1678/79 (0.1379 MPa (20 psia), 72 kW, & 55.6 K (100 deg. F)

Subcooling)

Exp. 1566 (0.1379 MPa (20 psia), 72 kW, & 11.1 K (20 deg. F)

Subcooling)

Exp. 1582 (0.1379 MPa (20 psia), 144 kW, & 55.6 K (100 deg. F)

Subcooling)

Exp. 1570 (0.1379 MPa (20 psia), 144 kW, & 11.1 K (20 deg. F)

Subcooling)
71

Figure 3-13 Void Fraction Versus Quality for Various Experiments at Different Pressures with 

Flow Rate at 15.24 mm/s (0.6 in/s)

Figure 3-14 shows that with the increase in power a greater quality and void fraction are 

observed in the flow.

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00

Quality

α

Exp. 1651 (0.2758 MPa (40 psi))

Exp. 1659 (0.4137 MPa (60 psi))

Exp. 1678/79 (0.1379 MPa (20 psi))
72

Figure 3-14 Void Fraction Versus Quality for Various Experiments at Different Pressures and 

Powers with Flow Rate at 15.24 mm/s (0.6 in/s)

Figure 3-15 shows the effects of increasing power and decreasing inlet subcooling. Again as 

was observed with the power increases in Figure 3-14, the void fraction and quality reach much 

greater values than the cases at lower power and higher inlet suibcooling. These effects are 

expected as the power and subcooling changes necessitate additional cooling and thus result in 

the two-phase interface to occur at lower elevations along the rod bundle.

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00

Quality

α

Exp. 1582 (0.1379 MPa (20 psi) & 144 kW)

Exp. 1651 (0.2758 MPa (40 psi) & 72 kW)

Exp. 1678/79 (0.1379 MPa (20 psi) & 72 kW)

Exp. 1683 (0.2758 MPa (40 psi) & 144 kW)
73

Figure 3-15 Void Fraction Versus Quality for Various Experiments at Different Inlet Subcoolings 

and Powers with Flow Rate at 15.24 mm/s (0.6 in/s)

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00

Quality

α

Exp. 1566 (0.1379 MPa (20 psi), 72 kW, & 11.1 K (20 deg. F)

Subcooling)

Exp. 1570 (0.1379 MPa (20 psi), 144 kW, & 11.1 K (20 deg. F)

Subcooling)

Exp. 1582 (0.1379 MPa (20 psi), 144 kW, & 55.6 K (100 deg. F)

Subcooling)

Exp. 1678/79 (0.1379 MPa (20 psi), 72 kW, & 55.6 K (100 deg. F)

Subcooling)
 
75

4. CONCLUSIONS

4.1 Conclusions

A series of level swell boil-off tests were performed in the RBHT test facility to provide an 

experimental data base that can be used to assess computer codes such as the NRC TRACE 

code. The measured pressure drop data were corrected for both two-phase frictional and 

acceleration pressure drop to obtain the local void fraction. The corrections were found to be a 

small percentage of the measured pressure drop. 

Experimental data plots showed that in low-pressure low-flow boil-off tests, the effects of 

decreasing the subcooling or increasing the power appear to cause the greatest changes in the 

void fraction distribution along the length of the bundle. The effects of decreasing the 

subcooling caused a greater length of the rod bundle to be in a two-phase flow condition and 

the exit void to be slightly increased. The effects of increasing the power did decrease the 

elevation at which two-phase flow begins, and the void fraction was found to increase at a much 

more rapid rate as expected, such that in some experiments the flow at the top of the rod bundle 

was single phase vapor. Either by decreasing the inlet subcooling or increasing the power will 

result in higher void fractions in the bundle as expected.

The effect of increasing pressure was observed to be relatively small. The higher pressure 

showed some suppression of boiling as the saturation line moved upward in the bundle, with

other conditions being the same. The void fraction at the exit was also observed to be slightly 

lower as the pressure increased.

The effects of changing multiple inlet conditions were analyzed. The effects of increased power 

and pressure were studied, and it was observed that the saturation line remained at 

approximately the same location as when only the power was increased. Increasing power 

does have a more significant effect on the void fraction than pressure. However, the increased 

pressure slows the rate at which the void fraction increased over the length of the bundle due to 

the reduced phase slip and a higher saturation temperature. The other multiple condition 

analysis studied the effects of decreasing the subcooling while also increasing the power. The 

results of this experiment were slightly different than expected. The effects of decreasing the 

amount of subcooling and increasing the power were to decrease the elevation at which the onset of boiling occurs resulting in an increase in the value of the void fraction over the length of 

the rod bundle. These effects were seen in the experiments, except the void fraction at the exit 

appears to be slightly lower than in the case of only increasing the power.

4.2 Recommendations for Future Work

There are areas of additional analysis of the current experimental data that could be completed. 

Such areas include the onset of boiling within the subcooled region, flow regime assessment, 

and additional comparisons to other level swell data. The subcooled region below the 

saturation level can be analyzed further to calculate the onset of subcooled nucleate boiling. 

Also, the boiling region of the rod bundle can be compared with various known boiling 

correlations, such as those developed by Rohsenow, Jens-Lottes, and Chen. These areas of 

analysis, and others, would be useful in further validating the effectiveness of current 

correlations and models in modeling the newer advanced reactor designs and the possible 

transient scenarios that may occur in each.
 
77

5. REFERENCES

1 Burkardt, John. “NBS Steam Table Routines,” using the Fortran program language 

available at http://orion.math.iastate.edu/burkardt/f_src/steam/steam.html, 2002.

2 Haar, Lester, Gallagher et al. “NBS/NRC Steam Tables: Thermodynamic and 

Transport Properties and Computer Programs for Vapor and Liquid States of Water 

in SI Units.” Hemisphere Publishing Corporation, Washington, 1984.

3 Meyer, C.A. et al. ASME Steam Tables: Thermodynamic and Transport Properties 

of Steam, American Society of Mechanical Engineers, 1967.

4 Miller, D.J. “Analysis of the Rod Bundle Heat Transfer Facility Two-Phase Interfacial 

Drag Experiments.” The Pennsylvania State University, 2004.

5 Hochreiter, L. E. “Nuclear Engineering 501: Reactor Engineering, Program 

PWRDNB.” The Pennsylvania State University, 2003.

6 Collier, John G. and Thome, John R. “Convection Boiling and Condensation, 3rd

Edition.” Oxford University Press, Inc., 1996.

7 Dougall, Richard S. and Rohsenow, Warren M. “Film Boiling on the Inside of 

Vertical Tubes with Upward Flow of the Fluid at Low Qualities.” Massachusetts 

Institute of Technology, 1963.

8 Hewitt, G.F. and Roberts, D.N. "Studies of Two-Phase Flow Patterns by 

Simultaneous X-ray and Flash Photography." UKAEA Report AEREM-2159, 1969. 

9 Friedel, L. “Improved Friction Pressure Drop Correlations for Horizontal and Vertical 

Two-Phase Pipe Flow.” Paper E 2, European Two-Phase Flow Group Meeting, 

Ispra, Italy, 1979.

10 Wallis, Graham, B. “One-dimensional Two-phase Flow.” McGraw-Hill, Inc., New 

York, 1969. 

11 Rosal, E.R. et al. “Rod Bundle Heat Transfer Test Facility Design Description 

Report.” The Pennsylvania State University, 2001.

12 Young, H.D. “Statistical Treatment of Experimental Data”, McGraw-Hill Book 

Company, (1962).

A-1

APPENDIX A. TEST RESULTS FOR ALL VALID EXPERIMENTS

The following data represents the validated results of the Two-phase mixture level and 

uncovery Test Series. This data is presented for steady-state windows during the respective 

experiments. For each steady-state window, the following plots and tables are provided:

• Summary and Comment Sheet – listing of the as-run conditions for the 

experiment steady-state window.

• Critical Instrument Plots – verify that steady-state conditions were achieved 

and maintained for boundary conditions during the respective time windows of 

the experiment. The following experimental data is plotted over the steady-state 

window:

1. Upper Plenum Pressure

2. Bundle Power

3. Inlet Flow Rate

4. Inlet Flow Temperature

• Data Tables – tabulated representation of the following test parameters versus 

elevation: 

1. Superficial Phase Velocities

2. Quality

3. Local Pressure

4. Local Heat Flux

5. ∆Pmeasured

6. ∆Pfriction

7. ∆Pacceleration

8. ∆Pgrid

9. αcorrected

10. αμινιμυμ

11. αmaximum
A-2

RBHT Two-Phase Mixture Level and Uncovery Test INT-1547-A 

Test Conditions

Date: 5/21/2003

Steady-state time window: 400 – 600 seconds

Inlet flow rate: 1.402 cm/sec (0.552 in./sec)

Inlet mass flow rate: 0.0621 kg/sec (0.137 lbm/sec)

Inlet flow temperature: 368.5 K (203.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.44 kW
A-3

Figure A-1 Inlet Flow Plot for Experiment 1547A 

Figure A-2 Inlet Temperature Plot for Experiment 1547A 
A-4

Figure A-3 System Pressure Plot for Experiment 1547A 

Figure A-4 Bundle Power Plot for Experiment 1547A 
A-5

Table A-1: Data Results for RBHT Test 1547 for Time Period 400 to 600 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.779 12.651 605.731 0.495 23.701 0.117 5.602 0.000 0.000 12.04 576.478 2892.04 138471.618 0.789 0.785 0.793

* 120-133 3048-3378 383 0.768 15.663 749.952 0.547 26.191 0.209 10.007 -0.213 -10.195 15.12 723.949 2907.16 139195.568 0.776 0.772 0.780

* 108-120 2743-3048 382 0.682 19.797 947.884 0.455 21.786 0.261 12.497 3.481 166.670 15.6 746.932 2922.76 139942.500 0.750 0.746 0.754

100-108 2540-2743 381 0.725 11.415 546.550 0.272 13.023 0.191 9.145 0.000 0.000 10.95 524.289 2933.71 140466.789 0.737 0.733 0.741

97-100 2464-2540 380 0.666 5.204 249.155 0.095 4.549 0.069 3.304 0.000 0.000 5.039 241.269 2938.75 140708.057 0.677 0.674 0.680

93-97 2362-2464 379 0.668 6.902 330.466 0.121 5.794 0.090 4.309 0.000 0.000 6.687 320.175 2945.44 141028.233 0.678 0.675 0.681

* 85-93 2159-2362 378 0.548 18.774 898.899 0.224 10.725 0.173 8.283 5.477 262.235 12.9 617.655 2958.34 141645.888 0.690 0.687 0.693

81-85 2057-2159 377 0.692 6.398 306.347 0.103 4.932 0.083 3.974 0.000 0.000 6.209 297.289 2964.55 141943.176 0.701 0.697 0.705

78-81 1981-2057 376 0.551 7.001 335.191 0.073 3.495 0.061 2.921 0.000 0.000 6.866 328.746 2971.41 142271.922 0.559 0.556 0.562

75-78 1905-1981 375 0.584 6.486 310.574 0.070 3.352 0.059 2.825 0.000 0.000 6.355 304.279 2977.77 142576.201 0.592 0.589 0.595

72-75 1829-1905 374 0.572 6.673 319.525 0.067 3.208 0.058 2.777 0.000 0.000 6.544 313.328 2984.31 142889.530 0.580 0.577 0.583

* 67-72 1702-1829 373 0.505 12.859 615.677 0.105 5.027 0.093 4.453 2.561 122.606 10.1 483.591 2994.41 143373.120 0.611 0.608 0.614

63-67 1600-1702 372 0.635 7.587 363.289 0.078 3.735 0.072 3.447 0.000 0.000 7.435 355.990 3001.85 143729.110 0.642 0.639 0.645

60-63 1524-1600 371 0.499 7.806 373.733 0.055 2.633 0.052 2.490 0.000 0.000 7.694 368.391 3009.54 144097.501 0.506 0.503 0.509

57-60 1448-1524 370 0.500 7.785 372.738 0.052 2.490 0.051 2.442 0.000 0.000 7.679 367.672 3017.22 144465.173 0.507 0.504 0.510

53-57 1346-1448 369 0.471 10.984 525.912 0.065 3.112 0.066 3.160 0.000 0.000 10.85 519.501 3028.07 144984.674 0.478 0.476 0.480

* 46-53 1168-1346 368 0.314 24.923 1193.310 0.101 4.836 0.109 5.219 5.803 277.839 18.91 905.416 3046.98 145890.090 0.480 0.478 0.482

43-46 1092-1168 367 0.476 8.159 390.642 0.038 1.819 0.045 2.155 0.000 0.000 8.074 386.585 3055.05 146276.675 0.482 0.480 0.484

37-43 940-1092 366 0.436 17.590 842.205 0.068 3.256 0.085 4.070 0.000 0.000 17.43 834.553 3072.48 147111.228 0.441 0.439 0.443

* 25-37 635-940 365 0.280 44.860 2147.908 0.103 4.932 0.154 7.374 2.483 118.886 42.12 2016.716 3114.6 149127.944 0.324 0.322 0.326

13-25 330-635 364 0.204 49.586 2374.186 0.052 2.490 0.132 6.320 0.000 0.000 49.39 2364.806 3163.99 151492.750 0.207 0.206 0.208

* 0-13 0-330 363 0.036 65.093 3116.679 0.010 0.479 0.010 0.479 4.573 218.966 60.5 2896.756 3224.49 154389.506 0.104 0.103 0.105

Results for RBHT Test 1547 

Valid Time Period 400 to 600 seconds

Collapsed Liquid Level = 62.46 inches = 1586.4 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-1 Data Results for RBHT Test 1547

A for Time Period 400 to 600 seconds
A-6

Table A-2 Energy Balance Results for RBHT Test 1547A for Time Period 400 to 600 seconds

Elevation Elevation q''w q''w x Jg Jg Jf Jf

(ft) (mm) (BTU/hr-ft2

) (kW/m2) (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2466.565 7.78096 0.00E+00 0.00E+00 0.00E+00 4.39E-02 1.34E-02

0.25 6.35 2603.597 8.21323 0.00E+00 0.00E+00 0.00E+00 4.39E-02 1.34E-02

0.50 12.70 2740.628 8.64551 0.00E+00 0.00E+00 0.00E+00 4.39E-02 1.34E-02

0.75 19.05 2877.660 9.07778 0.00E+00 0.00E+00 0.00E+00 4.39E-02 1.34E-02

1.00 25.40 3014.691 9.51006 9.64E-05 5.05E-03 1.54E-03 4.39E-02 1.34E-02

1.25 31.75 3151.722 9.94233 7.28E-03 3.82E-01 1.16E-01 4.36E-02 1.33E-02

1.50 38.10 3288.754 10.37461 1.48E-02 7.75E-01 2.36E-01 4.33E-02 1.32E-02

1.75 44.45 3425.785 10.80688 2.26E-02 1.18E+00 3.61E-01 4.30E-02 1.31E-02

2.00 50.80 3562.817 11.23916 3.08E-02 1.61E+00 4.91E-01 4.26E-02 1.30E-02

2.25 57.15 3699.848 11.67143 3.92E-02 2.06E+00 6.27E-01 4.22E-02 1.29E-02

2.50 63.50 3836.880 12.10371 4.80E-02 2.52E+00 7.67E-01 4.18E-02 1.28E-02

2.75 69.85 3973.911 12.53599 5.71E-02 2.99E+00 9.12E-01 4.14E-02 1.26E-02

3.00 76.20 4110.942 12.96826 6.65E-02 3.49E+00 1.06E+00 4.10E-02 1.25E-02

3.25 82.55 4247.974 13.40054 7.62E-02 4.00E+00 1.22E+00 4.06E-02 1.24E-02

3.50 88.90 4385.005 13.83281 8.63E-02 4.52E+00 1.38E+00 4.02E-02 1.22E-02

3.75 95.25 4522.037 14.26509 9.67E-02 5.07E+00 1.54E+00 3.97E-02 1.21E-02

4.00 101.60 4659.068 14.69736 1.07E-01 5.63E+00 1.72E+00 3.92E-02 1.20E-02

4.25 107.95 4796.099 15.12964 1.18E-01 6.21E+00 1.89E+00 3.87E-02 1.18E-02

4.50 114.30 4933.131 15.56191 1.30E-01 6.80E+00 2.07E+00 3.82E-02 1.17E-02

4.75 120.65 5070.162 15.99419 1.41E-01 7.41E+00 2.26E+00 3.77E-02 1.15E-02

5.00 127.00 5207.194 16.42646 1.53E-01 8.04E+00 2.45E+00 3.72E-02 1.13E-02

5.25 133.35 5344.225 16.85874 1.66E-01 8.68E+00 2.65E+00 3.67E-02 1.12E-02

5.50 139.70 5481.256 17.29101 1.78E-01 9.34E+00 2.85E+00 3.61E-02 1.10E-02

5.75 146.05 5618.288 17.72329 1.91E-01 1.00E+01 3.06E+00 3.55E-02 1.08E-02

6.00 152.40 5755.319 18.15557 2.04E-01 1.07E+01 3.27E+00 3.50E-02 1.07E-02

6.25 158.75 5892.351 18.58784 2.18E-01 1.14E+01 3.48E+00 3.44E-02 1.05E-02

6.50 165.10 6029.382 19.02012 2.32E-01 1.22E+01 3.71E+00 3.38E-02 1.03E-02

6.75 171.45 6166.414 19.45239 2.46E-01 1.29E+01 3.93E+00 3.31E-02 1.01E-02

7.00 177.80 6303.445 19.88467 2.61E-01 1.37E+01 4.16E+00 3.25E-02 9.90E-03

7.25 184.15 6440.476 20.31694 2.76E-01 1.44E+01 4.40E+00 3.18E-02 9.71E-03

7.50 190.50 6577.508 20.74922 2.91E-01 1.52E+01 4.64E+00 3.12E-02 9.50E-03

7.75 196.85 6714.539 21.18149 3.06E-01 1.60E+01 4.89E+00 3.05E-02 9.30E-03

8.00 203.20 6851.571 21.61377 3.22E-01 1.69E+01 5.14E+00 2.98E-02 9.08E-03

8.25 209.55 6988.602 22.04604 3.38E-01 1.77E+01 5.40E+00 2.91E-02 8.87E-03

8.50 215.90 7125.633 22.47832 3.55E-01 1.86E+01 5.67E+00 2.84E-02 8.65E-03

8.75 222.25 7262.665 22.91059 3.71E-01 1.95E+01 5.93E+00 2.76E-02 8.42E-03

9.00 228.60 7399.696 23.34287 3.88E-01 2.04E+01 6.21E+00 2.69E-02 8.19E-03

9.25 234.95 6988.602 22.04604 4.05E-01 2.12E+01 6.47E+00 2.61E-02 7.97E-03

9.50 241.30 6577.508 20.74922 4.21E-01 2.21E+01 6.73E+00 2.55E-02 7.76E-03

9.75 247.65 6166.414 19.45239 4.36E-01 2.28E+01 6.96E+00 2.48E-02 7.56E-03

10.00 254.00 5755.319 18.15557 4.50E-01 2.36E+01 7.18E+00 2.42E-02 7.37E-03

10.25 260.35 5344.225 16.85874 4.63E-01 2.43E+01 7.39E+00 2.36E-02 7.20E-03

10.50 266.70 4933.131 15.56191 4.75E-01 2.49E+01 7.58E+00 2.31E-02 7.04E-03

10.75 273.05 4522.037 14.26509 4.86E-01 2.55E+01 7.76E+00 2.26E-02 6.89E-03

11.00 279.40 4110.942 12.96826 4.96E-01 2.60E+01 7.92E+00 2.22E-02 6.76E-03

11.25 285.75 3699.848 11.67143 5.05E-01 2.65E+01 8.07E+00 2.18E-02 6.63E-03

11.50 292.10 3288.754 10.37461 5.13E-01 2.69E+01 8.19E+00 2.14E-02 6.53E-03

11.75 298.45 2877.660 9.07778 5.20E-01 2.73E+01 8.31E+00 2.11E-02 6.43E-03

12.00 304.80 2466.565 7.78096 5.26E-01 2.76E+01 8.41E+00 2.08E-02 6.35E-03

Results for RBHT Test 1547

Valid Time Period 400 to 600 seconds
A-7

Figure A-5 Void Fraction Comparison Plot Before and After Applying Corrections for Experiment 

1547A for Time Period 400 to 600 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-8

RBHT Two-Phase Mixture Level and Uncovery Test INT-1560-A 

Test Conditions

Date: 5/22/2003

Steady-state time window: 1600 – 1800 seconds

Inlet flow rate: 2.548 cm/sec (1.003 in./sec) 

Inlet mass flow rate: 0.125 kg/sec (0.275 lbm/sec) 

Inlet flow temperature: 367.8 K (202.4 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 77.02 kW 
A-9

Figure A-6 Inlet Flow Plot for Experiment 1560A 

Figure A-7 Inlet Temperature Plot for Experiment 1560A 
A-10

Figure A-8 System Pressure Plot for Experiment 1560A 

Figure A-9 Bundle Power Plot for Experiment 1560A 
A-11

Table A-3: Data Results for RBHT Test 1560 for Time Period 1600 to 1800 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel Δpgrid Δpgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.67 19.013 910.337 0.989 47.354 0.237 11.348 0.000 0.000 17.78 851.3109695 2897.78 138746.4511 0.689 0.686 0.692

* 120-133 3048-3378 383 0.67 22.082 1057.294 1.098 52.573 0.423 20.253 -1.739 -83.262 22.3 1067.729731 2920.08 139814.1809 0.67 0.667 0.673* 108-120 2743-3048 382 0.55 27.847 1333.304 0.918 43.954 0.528 25.281 3.431 164.260 22.97 1099.809503 2943.05 140913.9904 0.631 0.628 0.634

100-108 2540-2743 381 0.59 17.045 816.095 0.550 26.334 0.386 18.482 0.000 0.000 16.1 770.8721377 2959.15 141684.8625 0.612 0.609 0.615

97-100 2464-2540 380 0.53 7.400 354.338 0.193 9.241 0.140 6.703 0.000 0.000 7.068 338.4176565 2966.218 142023.2802 0.546 0.543 0.549

93-97 2362-2464 379 0.53 9.831 470.710 0.246 11.779 0.182 8.714 0.000 0.000 9.402 450.1701763 2975.62 142473.4503 0.547 0.544 0.550

* 85-93 2159-2362 378 0.41 24.424 1169.438 0.453 21.690 0.349 16.710 5.302 253.872 18.32 877.1663082 2993.94 143350.6166 0.559 0.556 0.562

81-85 2057-2159 377 0.55 9.296 445.098 0.208 9.959 0.167 7.996 0.000 0.000 8.919 427.0440122 3002.859 143777.6607 0.571 0.568 0.57478-81 1981-2057 376 0.41 9.130 437.141 0.148 7.086 0.122 5.841 0.000 0.000 8.856 424.027556 3011.715 144201.6882 0.431 0.429 0.43375-78 1905-1981 375 0.45 8.616 412.524 0.141 6.751 0.120 5.746 0.000 0.000 8.351 399.8480262 3020.066 144601.5362 0.464 0.462 0.46672-75 1829-1905 374 0.42 8.964 429.184 0.134 6.416 0.117 5.602 0.000 0.000 8.708 416.941278 3028.774 145018.4775 0.441 0.439 0.443

* 67-72 1702-1829 373 0.37 16.432 786.754 0.208 9.959 0.189 9.049 1.915 91.676 14.12 676.0692288 3042.894 145694.5467 0.456 0.454 0.458

63-67 1600-1702 372 0.46 11.280 540.085 0.153 7.326 0.145 6.943 0.000 0.000 10.98 525.7252219 3053.874 146220.272 0.471 0.469 0.47360-63 1524-1600 371 0.32 10.579 506.516 0.106 5.075 0.106 5.075 0.000 0.000 10.36 496.0394625 3064.234 146716.3114 0.335 0.333 0.33757-60 1448-1524 370 0.35 10.054 481.402 0.100 4.788 0.103 4.932 0.000 0.000 9.849 471.5726512 3074.083 147187.8841 0.368 0.366 0.37053-57 1346-1448 369 0.31 14.396 689.280 0.122 5.841 0.133 6.368 0.000 0.000 14.14 677.026834 3088.223 147864.9109 0.319 0.317 0.321

* 46-53 1168-1346 368 0.20 29.140 1395.220 0.184 8.810 0.221 10.582 3.525 168.767 25.21 1207.061279 3113.433 149071.9722 0.306 0.304 0.308

43-46 1092-1168 367 0.28 11.171 534.863 0.067 3.208 0.090 4.309 0.000 0.000 11.01 527.1616296 3124.443 149599.1338 0.293 0.292 0.29437-43 940-1092 366 0.22 24.274 1162.227 0.111 5.315 0.172 8.235 0.000 0.000 23.98 1148.168563 3148.423 150747.3024 0.23 0.229 0.231

* 25-37 635-940 365 0.09 56.488 2704.653 0.123 5.889 0.311 14.891 2.284 109.351 53.77 2574.521419 3202.193 153321.8238 0.137 0.136 0.138

13-25 330-635 364 0.04 59.619 2854.594 0.012 0.575 0.006 0.287 0.000 0.000 59.58 2852.705712 3261.773 156174.5295 0.044 0.042 0.046

* 0-13 0-330 363 0.03 65.348 3128.863 0.004 0.192 0.000 0.000 -0.676 -32.383 66.02 3161.054567 3327.793 159335.5841 0.022 0.021 0.023

Results for RBHT Test 1560

Valid Time Period 1600 to 1800 seconds

Collapsed Liquid Level = 76.732 inches =1949.01 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-3 Data Results for RBHT Test 1560

A for Time Period 1600 to 1800 seconds
A-12

Table A-4 Energy Balance Results for RBHT Test 1560A for Time Period 1600 to 1800 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2481.7082 7.828726 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

0.25 6.35 2619.5809 8.263655 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

0.50 12.70 2757.4535 8.698584 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

0.75 19.05 2895.3262 9.133513 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

1.00 25.40 3033.1989 9.568442 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

1.25 31.75 3171.0716 10.00337 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

1.50 38.10 3308.9442 10.4383 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

1.75 44.45 3446.8169 10.87323 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

2.00 50.80 3584.6896 11.30816 0.00E+00 0.00E+00 0.00E+00 8.83E-02 4.01E-02

2.25 57.15 3722.5623 11.74309 3.22E-03 3.39E-01 1.54E-01 8.80E-02 3.99E-02

2.50 63.50 3860.4349 12.17802 7.61E-03 8.02E-01 3.64E-01 8.76E-02 3.98E-02

2.75 69.85 3998.3076 12.61295 1.22E-02 1.28E+00 5.81E-01 8.72E-02 3.96E-02

3.00 76.20 4136.1803 13.04788 1.69E-02 1.78E+00 8.07E-01 8.68E-02 3.94E-02

3.25 82.55 4274.053 13.48281 2.18E-02 2.29E+00 1.04E+00 8.64E-02 3.92E-02

3.50 88.90 4411.9257 13.91773 2.68E-02 2.82E+00 1.28E+00 8.59E-02 3.90E-02

3.75 95.25 4549.7983 14.35266 3.20E-02 3.37E+00 1.53E+00 8.55E-02 3.88E-02

4.00 101.60 4687.671 14.78759 3.74E-02 3.93E+00 1.78E+00 8.50E-02 3.86E-02

4.25 107.95 4825.5437 15.22252 4.29E-02 4.51E+00 2.05E+00 8.45E-02 3.83E-02

4.50 114.30 4963.4164 15.65745 4.85E-02 5.11E+00 2.32E+00 8.40E-02 3.81E-02

4.75 120.65 5101.289 16.09238 5.44E-02 5.73E+00 2.60E+00 8.35E-02 3.79E-02

5.00 127.00 5239.1617 16.52731 6.04E-02 6.36E+00 2.88E+00 8.30E-02 3.76E-02

5.25 133.35 5377.0344 16.96224 6.65E-02 7.01E+00 3.18E+00 8.24E-02 3.74E-02

5.50 139.70 5514.9071 17.39717 7.28E-02 7.67E+00 3.48E+00 8.19E-02 3.71E-02

5.75 146.05 5652.7797 17.8321 7.93E-02 8.35E+00 3.79E+00 8.13E-02 3.69E-02

6.00 152.40 5790.6524 18.26703 8.59E-02 9.05E+00 4.11E+00 8.07E-02 3.66E-02

6.25 158.75 5928.5251 18.70196 9.27E-02 9.77E+00 4.43E+00 8.01E-02 3.63E-02

6.50 165.10 6066.3978 19.13688 9.97E-02 1.05E+01 4.76E+00 7.95E-02 3.61E-02

6.75 171.45 6204.2704 19.57181 1.07E-01 1.12E+01 5.10E+00 7.89E-02 3.58E-02

7.00 177.80 6342.1431 20.00674 1.14E-01 1.20E+01 5.45E+00 7.82E-02 3.55E-02

7.25 184.15 6480.0158 20.44167 1.22E-01 1.28E+01 5.80E+00 7.76E-02 3.52E-02

7.50 190.50 6617.8885 20.8766 1.29E-01 1.36E+01 6.17E+00 7.69E-02 3.49E-02

7.75 196.85 6755.7612 21.31153 1.37E-01 1.44E+01 6.54E+00 7.62E-02 3.46E-02

8.00 203.20 6893.6338 21.74646 1.45E-01 1.53E+01 6.92E+00 7.55E-02 3.43E-02

8.25 209.55 7031.5065 22.18139 1.53E-01 1.61E+01 7.30E+00 7.48E-02 3.39E-02

8.50 215.90 7169.3792 22.61632 1.61E-01 1.70E+01 7.70E+00 7.41E-02 3.36E-02

8.75 222.25 7307.2519 23.05125 1.70E-01 1.79E+01 8.10E+00 7.33E-02 3.33E-02

9.00 228.60 7445.1245 23.48618 1.78E-01 1.87E+01 8.50E+00 7.26E-02 3.29E-02

9.25 234.95 7031.5065 22.18139 1.86E-01 1.96E+01 8.91E+00 7.19E-02 3.26E-02

9.50 241.30 6617.8885 20.8766 1.94E-01 2.05E+01 9.28E+00 7.12E-02 3.23E-02

9.75 247.65 6204.2704 19.57181 2.02E-01 2.13E+01 9.64E+00 7.05E-02 3.20E-02

10.00 254.00 5790.6524 18.26703 2.09E-01 2.20E+01 9.97E+00 6.99E-02 3.17E-02

10.25 260.35 5377.0344 16.96224 2.15E-01 2.27E+01 1.03E+01 6.93E-02 3.14E-02

10.50 266.70 4963.4164 15.65745 2.21E-01 2.33E+01 1.06E+01 6.88E-02 3.12E-02

10.75 273.05 4549.7983 14.35266 2.27E-01 2.39E+01 1.08E+01 6.83E-02 3.10E-02

11.00 279.40 4136.1803 13.04788 2.32E-01 2.44E+01 1.11E+01 6.79E-02 3.08E-02

11.25 285.75 3722.5623 11.74309 2.36E-01 2.49E+01 1.13E+01 6.74E-02 3.06E-02

11.50 292.10 3308.9442 10.4383 2.40E-01 2.53E+01 1.15E+01 6.71E-02 3.04E-02

11.75 298.45 2895.3262 9.133513 2.44E-01 2.57E+01 1.17E+01 6.68E-02 3.03E-02

12.00 304.80 2481.7082 7.828726 2.47E-01 2.60E+01 1.18E+01 6.65E-02 3.02E-02

Results for RBHT Test 1560

Valid Time Period 1600 to 1800 seconds
A-13

Figure A-10 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1560A for Time Period 1600 to 1800 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-14

RBHT Two-Phase Mixture Level and Uncovery Test INT-1560-B 

Test Conditions

Date: 5/22/2003

Steady-state time window: 1900 – 2020 seconds

Inlet flow rate: 1.783 cm/sec (0.702 in./sec) 

Inlet mass flow rate: 0.087 kg/sec (0.192 lbm/sec) 

Inlet flow temperature: 367.8 K (202.4 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 77.02 kW 
A-15

Figure A-11 Inlet Flow Plot for Experiment 1560B 

Figure A-12 Inlet Temperature Plot for Experiment 1560B 
A-16

Figure A-13 System Pressure Plot for Experiment 1560B 

Figure A-14 Bundle Power Plot for Experiment 1560B 
A-17

Table A-5: Data Results for RBHT Test 1560 for Time Period 1900 to 2020 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.796 11.675 558.983 0.697 33.373 0.166 7.948 0.000 0.000 10.81 517.586 2890.81 138412.7257 0.811 0.807 0.815

* 120-133 3048-3378 383 0.822 11.997 574.400 0.773 37.011 0.296 14.173 -1.752 -83.906 12.68 607.122 2903.49 139019.8474 0.812 0.808 0.816

* 108-120 2743-3048 382 0.748 15.684 750.947 0.646 30.931 0.370 17.716 3.138 150.241 11.53 552.059 2915.02 139571.9068 0.815 0.811 0.819

100-108 2540-2743 381 0.801 8.289 396.858 0.387 18.530 0.271 12.976 0.000 0.000 7.629 365.278 2922.649 139937.1852 0.816 0.812 0.820

97-100 2464-2540 380 0.739 4.061 194.451 0.136 6.512 0.098 4.692 0.000 0.000 3.825 183.142 2926.474 140120.3272 0.754 0.750 0.758

93-97 2362-2464 379 0.744 5.323 254.874 0.173 8.283 0.128 6.129 0.000 0.000 5.021 240.407 2931.495 140360.734 0.758 0.754 0.762

* 85-93 2159-2362 378 0.602 16.541 791.976 0.320 15.322 0.245 11.731 6.534 312.838 9.442 452.085 2940.937 140812.8194 0.773 0.769 0.777

81-85 2057-2159 377 0.774 4.690 224.538 0.147 7.038 0.117 5.602 0.000 0.000 4.421 211.679 2945.358 141024.498 0.787 0.783 0.791

78-81 1981-2057 376 0.626 5.822 278.746 0.105 5.027 0.086 4.118 0.000 0.000 5.63 269.566 2950.988 141294.0638 0.639 0.636 0.642

75-78 1905-1981 375 0.659 5.318 254.626 0.100 4.788 0.084 4.022 0.000 0.000 5.129 245.578 2956.117 141539.6417 0.671 0.668 0.674

72-75 1829-1905 374 0.644 5.552 265.815 0.096 4.597 0.082 3.926 0.000 0.000 5.374 257.309 2961.491 141796.9502 0.655 0.652 0.658

* 67-72 1702-1829 373 0.556 11.519 551.523 0.150 7.182 0.132 6.320 3.255 155.841 7.982 382.180 2969.473 142179.1304 0.693 0.690 0.696

63-67 1600-1702 372 0.720 5.822 278.746 0.111 5.315 0.102 4.884 0.000 0.000 5.606 268.417 2975.079 142447.5471 0.73 0.726 0.734

60-63 1524-1600 371 0.552 6.985 334.445 0.078 3.735 0.074 3.543 0.000 0.000 6.832 327.118 2981.911 142774.665 0.561 0.558 0.564

57-60 1448-1524 370 0.567 6.746 323.007 0.074 3.543 0.072 3.447 0.000 0.000 6.599 315.962 2988.51 143090.6268 0.576 0.573 0.579

53-57 1346-1448 369 0.530 9.769 467.726 0.091 4.357 0.093 4.453 0.000 0.000 9.582 458.789 2998.092 143549.4155 0.539 0.536 0.542

* 46-53 1168-1346 368 0.349 23.671 1133.383 0.141 6.751 0.155 7.421 6.815 326.313 16.56 792.897 3014.652 144342.3125 0.544 0.541 0.547

43-46 1092-1168 367 0.543 7.125 341.159 0.053 2.538 0.063 3.016 0.000 0.000 7.004 335.353 3021.656 144677.6658 0.55 0.547 0.553

37-43 940-1092 366 0.470 16.525 791.230 0.093 4.453 0.121 5.794 0.000 0.000 16.31 780.927 3037.966 145458.5928 0.477 0.475 0.479

* 25-37 635-940 365 0.258 46.236 2213.802 0.132 6.320 0.218 10.438 1.816 86.961 44.07 2110.083 3082.036 147568.6758 0.293 0.292 0.294

13-25 330-635 364 0.106 55.740 2668.846 0.058 2.777 0.137 6.560 0.000 0.000 55.53 2658.791 3137.566 150227.4664 0.109 0.108 0.110

* 0-13 0-330 363 0.035 65.181 3120.906 0.002 0.096 0.000 0.000 1.359 65.092 63.82 3055.718 3201.386 153283.1844 0.054 0.051 0.057

Results for RBHT Test 1560

Valid Time Period 1900 to 2020 seconds

Collapsed Liquid Level =66.091 inches = 1678.72 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-5 Data Results for RBHT Test 1560

B for Time Period 1900 to 2020 seconds
A-18

Table A-6 Energy Balance Results for RBHT Test 1560B for Time Period 1900 to 2020 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2486.5552 7.844016 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

0.25 6.35 2624.6972 8.279795 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

0.50 12.70 2762.8392 8.715573 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

0.75 19.05 2900.9811 9.151352 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

1.00 25.40 3039.1231 9.587131 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

1.25 31.75 3177.265 10.02291 0.00E+00 0.00E+00 0.00E+00 6.18E-02 2.80E-02

1.50 38.10 3315.407 10.45869 2.79E-03 2.06E-01 9.33E-02 6.16E-02 2.80E-02

1.75 44.45 3453.549 10.89447 8.40E-03 6.19E-01 2.81E-01 6.13E-02 2.78E-02

2.00 50.80 3591.6909 11.33025 1.42E-02 1.05E+00 4.76E-01 6.09E-02 2.76E-02

2.25 57.15 3729.8329 11.76602 2.03E-02 1.50E+00 6.79E-01 6.06E-02 2.75E-02

2.50 63.50 3867.9748 12.2018 2.66E-02 1.96E+00 8.89E-01 6.02E-02 2.73E-02

2.75 69.85 4006.1168 12.63758 3.31E-02 2.44E+00 1.11E+00 5.98E-02 2.71E-02

3.00 76.20 4144.2587 13.07336 3.99E-02 2.94E+00 1.33E+00 5.93E-02 2.69E-02

3.25 82.55 4282.4007 13.50914 4.68E-02 3.45E+00 1.57E+00 5.89E-02 2.67E-02

3.50 88.90 4420.5427 13.94492 5.41E-02 3.98E+00 1.81E+00 5.85E-02 2.65E-02

3.75 95.25 4558.6846 14.3807 6.15E-02 4.53E+00 2.06E+00 5.80E-02 2.63E-02

4.00 101.60 4696.8266 14.81647 6.92E-02 5.10E+00 2.31E+00 5.75E-02 2.61E-02

4.25 107.95 4834.9685 15.25225 7.71E-02 5.68E+00 2.58E+00 5.70E-02 2.59E-02

4.50 114.30 4973.1105 15.68803 8.52E-02 6.28E+00 2.85E+00 5.65E-02 2.56E-02

4.75 120.65 5111.2525 16.12381 9.35E-02 6.89E+00 3.13E+00 5.60E-02 2.54E-02

5.00 127.00 5249.3944 16.55959 1.02E-01 7.53E+00 3.41E+00 5.55E-02 2.52E-02

5.25 133.35 5387.5364 16.99537 1.11E-01 8.18E+00 3.71E+00 5.50E-02 2.49E-02

5.50 139.70 5525.6783 17.43115 1.20E-01 8.85E+00 4.01E+00 5.44E-02 2.47E-02

5.75 146.05 5663.8203 17.86693 1.29E-01 9.52E+00 4.32E+00 5.38E-02 2.44E-02

6.00 152.40 5801.9622 18.3027 1.39E-01 1.02E+01 4.64E+00 5.32E-02 2.41E-02

6.25 158.75 5940.1042 18.73848 1.49E-01 1.09E+01 4.97E+00 5.26E-02 2.39E-02

6.50 165.10 6078.2462 19.17426 1.58E-01 1.17E+01 5.30E+00 5.20E-02 2.36E-02

6.75 171.45 6216.3881 19.61004 1.69E-01 1.24E+01 5.64E+00 5.14E-02 2.33E-02

7.00 177.80 6354.5301 20.04582 1.79E-01 1.32E+01 5.99E+00 5.07E-02 2.30E-02

7.25 184.15 6492.672 20.4816 1.90E-01 1.40E+01 6.34E+00 5.01E-02 2.27E-02

7.50 190.50 6630.814 20.91738 2.01E-01 1.48E+01 6.70E+00 4.94E-02 2.24E-02

7.75 196.85 6768.956 21.35315 2.12E-01 1.56E+01 7.08E+00 4.87E-02 2.21E-02

8.00 203.20 6907.0979 21.78893 2.23E-01 1.64E+01 7.45E+00 4.80E-02 2.18E-02

8.25 209.55 7045.2399 22.22471 2.35E-01 1.73E+01 7.84E+00 4.73E-02 2.15E-02

8.50 215.90 7183.3818 22.66049 2.46E-01 1.82E+01 8.24E+00 4.66E-02 2.11E-02

8.75 222.25 7321.5238 23.09627 2.58E-01 1.90E+01 8.64E+00 4.58E-02 2.08E-02

9.00 228.60 7459.6657 23.53205 2.71E-01 1.99E+01 9.04E+00 4.51E-02 2.05E-02

9.25 234.95 7045.2399 22.22471 2.83E-01 2.08E+01 9.45E+00 4.43E-02 2.01E-02

9.50 241.30 6630.814 20.91738 2.94E-01 2.17E+01 9.83E+00 4.36E-02 1.98E-02

9.75 247.65 6216.3881 19.61004 3.05E-01 2.24E+01 1.02E+01 4.30E-02 1.95E-02

10.00 254.00 5801.9622 18.3027 3.15E-01 2.32E+01 1.05E+01 4.24E-02 1.92E-02

10.25 260.35 5387.5364 16.99537 3.24E-01 2.39E+01 1.08E+01 4.18E-02 1.90E-02

10.50 266.70 4973.1105 15.68803 3.32E-01 2.45E+01 1.11E+01 4.13E-02 1.87E-02

10.75 273.05 4558.6846 14.3807 3.40E-01 2.51E+01 1.14E+01 4.08E-02 1.85E-02

11.00 279.40 4144.2587 13.07336 3.47E-01 2.56E+01 1.16E+01 4.03E-02 1.83E-02

11.25 285.75 3729.8329 11.76602 3.54E-01 2.61E+01 1.18E+01 3.99E-02 1.81E-02

11.50 292.10 3315.407 10.45869 3.60E-01 2.65E+01 1.20E+01 3.96E-02 1.79E-02

11.75 298.45 2900.9811 9.151352 3.65E-01 2.69E+01 1.22E+01 3.93E-02 1.78E-02

12.00 304.80 2486.5552 7.844016 3.69E-01 2.72E+01 1.24E+01 3.90E-02 1.77E-02

Results for RBHT Test 1560

Valid Time Period 1900 to 2020 seconds
A-19

Figure A-15 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1560B for Time Period 1900 to 2020 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-20

RBHT Two-Phase Mixture Level and Uncovery Test INT-1560-C 

Test Conditions

Date: 5/22/2003

Steady-state time window: 2090 – 2180 seconds

Inlet flow rate: 1.212 cm/sec (0.477 in./sec) 

Inlet mass flow rate: 0.059 kg/sec (0.131 lbm/sec) 

Inlet flow temperature: 367.8 K (202.4 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 77.02 kW 
A-21

Figure A-16 Inlet Flow Plot for Experiment 1560C 

Figure A-17 Inlet Temperature Plot for Experiment 1560C 
A-22

Figure A-18 System Pressure Plot for Experiment 1560C 

Figure A-19 Bundle Power Plot for Experiment 1560C 
A-23

Table A-7: Data Results for RBHT Test 1560 for Time Period 2090 to 2180 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.841 9.062 433.908 0.476 22.791 0.113 5.410 0.000 0.000 8.47 405.546 2888.47 138300.6859 0.852 0.848 0.856

* 120-133 3048-3378 383 0.868 8.901 426.200 0.526 25.185 0.201 9.624 -1.856 -88.848 10.03 480.239 2898.5 138780.9249 0.851 0.847 0.855

* 108-120 2743-3048 382 0.795 12.770 611.450 0.437 20.924 0.251 12.018 2.779 133.078 9.303 445.430 2907.803 139226.3549 0.851 0.847 0.855

100-108 2540-2743 381 0.840 6.663 319.028 0.261 12.497 0.184 8.810 0.000 0.000 6.216 297.624 2914.019 139523.9786 0.85 0.846 0.854

97-100 2464-2540 380 0.779 3.443 164.860 0.091 4.357 0.067 3.208 0.000 0.000 3.283 157.191 2917.302 139681.1695 0.789 0.785 0.793

93-97 2362-2464 379 0.776 4.653 222.798 0.116 5.554 0.087 4.166 0.000 0.000 4.446 212.876 2921.748 139894.0451 0.786 0.782 0.790

* 85-93 2159-2362 378 0.642 14.858 711.410 0.215 10.294 0.166 7.948 6.076 290.926 8.401 402.242 2930.149 140296.2872 0.798 0.794 0.802

81-85 2057-2159 377 0.801 4.134 197.932 0.099 4.740 0.080 3.830 0.000 0.000 3.955 189.366 2934.104 140485.6536 0.81 0.806 0.814

78-81 1981-2057 376 0.652 5.427 259.848 0.070 3.352 0.058 2.777 0.000 0.000 5.296 253.574 2939.4 140739.2274 0.66 0.657 0.663

75-78 1905-1981 375 0.690 4.835 231.501 0.067 3.208 0.057 2.729 0.000 0.000 4.71 225.516 2944.11 140964.7434 0.698 0.695 0.701

72-75 1829-1905 374 0.676 5.048 241.696 0.064 3.064 0.056 2.681 0.000 0.000 4.928 235.954 2949.038 141200.6973 0.684 0.681 0.687

* 67-72 1702-1829 373 0.584 10.807 517.457 0.100 4.788 0.090 4.309 3.329 159.409 7.288 348.951 2956.326 141549.6487 0.719 0.715 0.723

63-67 1600-1702 372 0.748 5.235 250.647 0.074 3.543 0.069 3.304 0.000 0.000 5.091 243.758 2961.417 141793.407 0.755 0.751 0.759

60-63 1524-1600 371 0.595 6.310 302.119 0.053 2.538 0.050 2.394 0.000 0.000 6.207 297.193 2967.624 142090.5998 0.602 0.599 0.605

57-60 1448-1524 370 0.602 6.206 297.146 0.050 2.394 0.049 2.346 0.000 0.000 6.103 292.213 2973.727 142382.813 0.608 0.605 0.611

53-57 1346-1448 369 0.573 8.875 424.956 0.062 2.969 0.063 3.016 0.000 0.000 8.746 418.761 2982.473 142801.5737 0.579 0.576 0.582

* 46-53 1168-1346 368 0.384 22.404 1072.711 0.097 4.644 0.105 5.027 6.822 326.640 15.38 736.398 2997.853 143537.9721 0.577 0.574 0.580

43-46 1092-1168 367 0.569 6.710 321.266 0.037 1.772 0.043 2.059 0.000 0.000 6.626 317.255 3004.479 143855.2267 0.575 0.572 0.578

37-43 940-1092 366 0.534 14.515 694.999 0.066 3.160 0.082 3.926 0.000 0.000 14.36 687.560 3018.839 144542.7872 0.539 0.536 0.542

* 25-37 635-940 365 0.285 44.533 2132.242 0.099 4.740 0.148 7.086 5.666 271.280 38.62 1849.136 3057.459 146391.9227 0.38 0.378 0.382

13-25 330-635 364 0.219 48.703 2331.914 0.050 2.394 0.127 6.081 0.000 0.000 48.51 2322.671 3105.969 148714.594 0.221 0.220 0.222

* 0-13 0-330 363 0.036 65.083 3116.182 0.011 0.527 0.013 0.622 5.039 241.260 60.02 2873.773 3165.989 151588.367 0.111 0.110 0.112

Results for RBHT Test 1560

Valid Time Period 2090 to 2180 seconds

Collapsed Liquid Level = 61.892 inches = 1572.05 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-7 Data Results for RBHT Test 1560

C for Time Period 2090 to 2180 seconds
A-24

Table A-8 Energy Balance Results for RBHT Test 1560C for Time Period 2090 to 2180 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2486.2913 7.843183 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.25 6.35 2624.4186 8.278916 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.50 12.70 2762.5459 8.714648 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.75 19.05 2900.6732 9.150381 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

1.00 25.40 3038.8005 9.586113 9.29E-04 4.65E-02 2.11E-02 4.19E-02 1.90E-02

1.25 31.75 3176.9278 10.02185 8.51E-03 4.26E-01 1.93E-01 4.16E-02 1.89E-02

1.50 38.10 3315.0551 10.45758 1.64E-02 8.23E-01 3.73E-01 4.13E-02 1.87E-02

1.75 44.45 3453.1824 10.89331 2.47E-02 1.24E+00 5.61E-01 4.09E-02 1.86E-02

2.00 50.80 3591.3097 11.32904 3.33E-02 1.67E+00 7.56E-01 4.06E-02 1.84E-02

2.25 57.15 3729.437 11.76478 4.22E-02 2.11E+00 9.59E-01 4.02E-02 1.82E-02

2.50 63.50 3867.5642 12.20051 5.15E-02 2.58E+00 1.17E+00 3.98E-02 1.81E-02

2.75 69.85 4005.6915 12.63624 6.11E-02 3.06E+00 1.39E+00 3.94E-02 1.79E-02

3.00 76.20 4143.8188 13.07197 7.10E-02 3.56E+00 1.61E+00 3.90E-02 1.77E-02

3.25 82.55 4281.9461 13.5077 8.13E-02 4.07E+00 1.85E+00 3.85E-02 1.75E-02

3.50 88.90 4420.0734 13.94344 9.19E-02 4.60E+00 2.09E+00 3.81E-02 1.73E-02

3.75 95.25 4558.2007 14.37917 1.03E-01 5.15E+00 2.34E+00 3.76E-02 1.71E-02

4.00 101.60 4696.328 14.8149 1.14E-01 5.72E+00 2.59E+00 3.72E-02 1.69E-02

4.25 107.95 4834.4553 15.25063 1.26E-01 6.30E+00 2.86E+00 3.67E-02 1.66E-02

4.50 114.30 4972.5826 15.68637 1.38E-01 6.90E+00 3.13E+00 3.62E-02 1.64E-02

4.75 120.65 5110.7099 16.1221 1.50E-01 7.52E+00 3.41E+00 3.57E-02 1.62E-02

5.00 127.00 5248.8372 16.55783 1.63E-01 8.15E+00 3.70E+00 3.51E-02 1.59E-02

5.25 133.35 5386.9645 16.99356 1.76E-01 8.80E+00 3.99E+00 3.46E-02 1.57E-02

5.50 139.70 5525.0918 17.4293 1.89E-01 9.46E+00 4.29E+00 3.40E-02 1.54E-02

5.75 146.05 5663.2191 17.86503 2.03E-01 1.01E+01 4.60E+00 3.35E-02 1.52E-02

6.00 152.40 5801.3464 18.30076 2.17E-01 1.09E+01 4.92E+00 3.29E-02 1.49E-02

6.25 158.75 5939.4737 18.73649 2.31E-01 1.16E+01 5.25E+00 3.23E-02 1.46E-02

6.50 165.10 6077.601 19.17223 2.46E-01 1.23E+01 5.58E+00 3.16E-02 1.44E-02

6.75 171.45 6215.7283 19.60796 2.61E-01 1.31E+01 5.92E+00 3.10E-02 1.41E-02

7.00 177.80 6353.8555 20.04369 2.76E-01 1.38E+01 6.27E+00 3.04E-02 1.38E-02

7.25 184.15 6491.9828 20.47942 2.92E-01 1.46E+01 6.62E+00 2.97E-02 1.35E-02

7.50 190.50 6630.1101 20.91516 3.08E-01 1.54E+01 6.99E+00 2.90E-02 1.32E-02

7.75 196.85 6768.2374 21.35089 3.24E-01 1.62E+01 7.36E+00 2.84E-02 1.29E-02

8.00 203.20 6906.3647 21.78662 3.41E-01 1.71E+01 7.74E+00 2.77E-02 1.25E-02

8.25 209.55 7044.492 22.22235 3.58E-01 1.79E+01 8.12E+00 2.69E-02 1.22E-02

8.50 215.90 7182.6193 22.65809 3.75E-01 1.88E+01 8.52E+00 2.62E-02 1.19E-02

8.75 222.25 7320.7466 23.09382 3.93E-01 1.97E+01 8.92E+00 2.55E-02 1.16E-02

9.00 228.60 7458.8739 23.52955 4.11E-01 2.06E+01 9.33E+00 2.47E-02 1.12E-02

9.25 234.95 7044.492 22.22235 4.29E-01 2.15E+01 9.73E+00 2.40E-02 1.09E-02

9.50 241.30 6630.1101 20.91516 4.45E-01 2.23E+01 1.01E+01 2.33E-02 1.06E-02

9.75 247.65 6215.7283 19.60796 4.61E-01 2.31E+01 1.05E+01 2.26E-02 1.03E-02

10.00 254.00 5801.3464 18.30076 4.76E-01 2.38E+01 1.08E+01 2.20E-02 9.98E-03

10.25 260.35 5386.9645 16.99356 4.89E-01 2.45E+01 1.11E+01 2.14E-02 9.72E-03

10.50 266.70 4972.5826 15.68637 5.02E-01 2.51E+01 1.14E+01 2.09E-02 9.48E-03

10.75 273.05 4558.2007 14.37917 5.14E-01 2.57E+01 1.17E+01 2.04E-02 9.26E-03

11.00 279.40 4143.8188 13.07197 5.24E-01 2.62E+01 1.19E+01 2.00E-02 9.06E-03

11.25 285.75 3729.437 11.76478 5.34E-01 2.67E+01 1.21E+01 1.96E-02 8.87E-03

11.50 292.10 3315.0551 10.45758 5.42E-01 2.72E+01 1.23E+01 1.92E-02 8.71E-03

11.75 298.45 2900.6732 9.150381 5.50E-01 2.75E+01 1.25E+01 1.89E-02 8.57E-03

12.00 304.80 2486.2913 7.843183 5.57E-01 2.79E+01 1.26E+01 1.86E-02 8.44E-03

Results for RBHT Test 1560

Valid Time Period 2090 to 2180 seconds
A-25

Figure A-20 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1560C for Time Period 2090 to 2180 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-26

RBHT Two-Phase Mixture Level and Uncovery Test INT-1560-D 

Test Conditions

Date: 5/22/2003

Steady-state time window: 2220 – 2310 seconds

Inlet flow rate: 0.772 cm/sec (0.304 in./sec) 

Inlet mass flow rate: 0.038 kg/sec (0.083 lbm/sec) 

Inlet flow temperature: 367.8 K (202.4 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 77.02 kW 
A-27

Figure A-21 Inlet Flow Plot for Experiment 1560D 

Figure A-22 Inlet Temperature Plot for Experiment 1560D 
A-28

Figure A-23 System Pressure Plot for Experiment 1560D 

Figure A-24 Bundle Power Plot for Experiment 1560D 
A-29

Table A-9: Data Results for RBHT Test 1560 for Time Period 2220 to 2310 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.885 6.564 314.304 0.299 14.316 0.072 3.447 0.000 0.000 6.189 296.331 2886.2 138191.4711 0.892 0.888 0.896

* 120-133 3048-3378 383 0.912 5.936 284.216 0.336 16.088 0.129 6.177 -1.929 -92.362 7.4 354.314 2893.6 138545.785 0.89 0.886 0.894

* 108-120 2743-3048 382 0.846 9.587 459.023 0.281 13.454 0.161 7.709 2.154 103.129 6.991 334.731 2900.6 138880.5158 0.888 0.884 0.892

100-108 2540-2743 381 0.880 5.001 239.458 0.168 8.044 0.118 5.650 0.000 0.000 4.714 225.708 2905.3 139106.2234 0.887 0.883 0.891

97-100 2464-2540 380 0.826 2.706 129.551 0.058 2.777 0.043 2.059 0.000 0.000 2.604 124.680 2907.9 139230.9036 0.833 0.829 0.837

93-97 2362-2464 379 0.807 4.004 191.715 0.074 3.543 0.056 2.681 0.000 0.000 3.874 185.488 2911.8 139416.3917 0.813 0.809 0.817

* 85-93 2159-2362 378 0.674 13.549 648.749 0.137 6.560 0.107 5.123 5.311 254.311 7.994 382.755 2919.8 139799.1465 0.808 0.804 0.812

81-85 2057-2159 377 0.796 4.233 202.656 0.063 3.016 0.051 2.442 0.000 0.000 4.119 197.219 2923.9 139996.3652 0.802 0.798 0.806

78-81 1981-2057 376 0.649 5.469 261.837 0.045 2.155 0.037 1.772 0.000 0.000 5.385 257.835 2929.3 140254.2004 0.654 0.651 0.657

75-78 1905-1981 375 0.676 5.048 241.696 0.043 2.059 0.037 1.772 0.000 0.000 4.966 237.773 2934.2 140491.9738 0.681 0.678 0.684

72-75 1829-1905 374 0.659 5.308 254.128 0.041 1.963 0.036 1.724 0.000 0.000 5.231 250.462 2939.5 140742.4354 0.664 0.661 0.667

* 67-72 1702-1829 373 0.567 11.249 538.593 0.063 3.016 0.058 2.777 2.976 142.480 8.152 390.320 2947.6 141132.7553 0.686 0.683 0.689

63-67 1600-1702 372 0.703 6.164 295.157 0.047 2.250 0.044 2.107 0.000 0.000 6.069 290.585 2953.7 141423.3405 0.708 0.704 0.712

60-63 1524-1600 371 0.561 6.840 327.483 0.033 1.580 0.032 1.532 0.000 0.000 6.77 324.149 2960.5 141747.4899 0.565 0.562 0.568

57-60 1448-1524 370 0.569 6.710 321.266 0.031 1.484 0.032 1.532 0.000 0.000 6.645 318.164 2967.1 142065.6542 0.573 0.570 0.576

53-57 1346-1448 369 0.532 9.727 465.736 0.039 1.867 0.041 1.963 0.000 0.000 9.644 461.757 2976.7 142527.4114 0.536 0.533 0.539

* 46-53 1168-1346 368 0.361 23.240 1112.744 0.061 2.921 0.068 3.256 6.001 287.337 17.11 819.231 2993.9 143346.6426 0.529 0.526 0.532

43-46 1092-1168 367 0.520 7.484 358.316 0.023 1.101 0.028 1.341 0.000 0.000 7.43 355.750 3001.3 143702.3929 0.523 0.520 0.526

37-43 940-1092 366 0.506 15.409 737.768 0.042 2.011 0.053 2.538 0.000 0.000 15.31 733.047 3016.6 144435.4396 0.508 0.505 0.511

* 25-37 635-940 365 0.313 42.840 2051.180 0.065 3.112 0.095 4.549 6.140 293.974 36.54 1749.545 3053.1 146184.9842 0.413 0.411 0.415

13-25 330-635 364 0.316 42.601 2039.741 0.038 1.819 0.082 3.926 0.000 0.000 42.47 2033.475 3095.6 148218.4587 0.318 0.316 0.320

* 0-13 0-330 363 0.052 63.987 3063.715 0.016 0.766 0.033 1.580 7.188 344.164 56.75 2717.205 3152.4 150935.6633 0.159 0.158 0.160

 (Z2φ) Two-Phase Level (Dryout) = 112.70 inches = 2862.58 mm

 (S) Level Swell = 2.226

Results for RBHT Test 1560

Valid Time Period 2220 to 2310 seconds

Collapsed Liquid Level = 54.785 inches = 1391.54 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-9 Data Results for RBHT Test 1560

D for Time Period 2220 to 2310 seconds
A-30

Table A-10 Energy Balance Results for RBHT Test 1560D for Time Period 2220 to 2310 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2486.8233 7.844862 0.00E+00 0.00E+00 0.00E+00 2.68E-02 1.22E-02

0.25 6.35 2624.9802 8.280687 0.00E+00 0.00E+00 0.00E+00 2.68E-02 1.22E-02

0.50 12.70 2763.137 8.716513 0.00E+00 0.00E+00 0.00E+00 2.68E-02 1.22E-02

0.75 19.05 2901.2939 9.152339 5.38E-03 1.73E-01 7.84E-02 2.66E-02 1.21E-02

1.00 25.40 3039.4507 9.588164 1.67E-02 5.38E-01 2.44E-01 2.63E-02 1.19E-02

1.25 31.75 3177.6076 10.02399 2.86E-02 9.20E-01 4.17E-01 2.60E-02 1.18E-02

1.50 38.10 3315.7644 10.45982 4.10E-02 1.32E+00 5.98E-01 2.57E-02 1.17E-02

1.75 44.45 3453.9213 10.89564 5.39E-02 1.73E+00 7.87E-01 2.53E-02 1.15E-02

2.00 50.80 3592.0781 11.33147 6.74E-02 2.17E+00 9.83E-01 2.50E-02 1.13E-02

2.25 57.15 3730.235 11.76729 8.14E-02 2.62E+00 1.19E+00 2.46E-02 1.12E-02

2.50 63.50 3868.3918 12.20312 9.59E-02 3.08E+00 1.40E+00 2.42E-02 1.10E-02

2.75 69.85 4006.5487 12.63894 1.11E-01 3.57E+00 1.62E+00 2.38E-02 1.08E-02

3.00 76.20 4144.7055 13.07477 1.27E-01 4.07E+00 1.84E+00 2.34E-02 1.06E-02

3.25 82.55 4282.8624 13.5106 1.43E-01 4.58E+00 2.08E+00 2.30E-02 1.04E-02

3.50 88.90 4421.0192 13.94642 1.59E-01 5.12E+00 2.32E+00 2.25E-02 1.02E-02

3.75 95.25 4559.1761 14.38225 1.76E-01 5.67E+00 2.57E+00 2.21E-02 1.00E-02

4.00 101.60 4697.3329 14.81807 1.94E-01 6.24E+00 2.83E+00 2.16E-02 9.79E-03

4.25 107.95 4835.4898 15.2539 2.12E-01 6.83E+00 3.10E+00 2.11E-02 9.57E-03

4.50 114.30 4973.6467 15.68972 2.31E-01 7.43E+00 3.37E+00 2.06E-02 9.34E-03

4.75 120.65 5111.8035 16.12555 2.50E-01 8.05E+00 3.65E+00 2.01E-02 9.11E-03

5.00 127.00 5249.9604 16.56137 2.70E-01 8.68E+00 3.94E+00 1.96E-02 8.87E-03

5.25 133.35 5388.1172 16.9972 2.90E-01 9.34E+00 4.24E+00 1.90E-02 8.62E-03

5.50 139.70 5526.2741 17.43303 3.11E-01 1.00E+01 4.54E+00 1.84E-02 8.37E-03

5.75 146.05 5664.4309 17.86885 3.33E-01 1.07E+01 4.85E+00 1.79E-02 8.11E-03

6.00 152.40 5802.5878 18.30468 3.55E-01 1.14E+01 5.17E+00 1.73E-02 7.84E-03

6.25 158.75 5940.7446 18.7405 3.77E-01 1.21E+01 5.50E+00 1.67E-02 7.57E-03

6.50 165.10 6078.9015 19.17633 4.00E-01 1.29E+01 5.83E+00 1.61E-02 7.29E-03

6.75 171.45 6217.0583 19.61215 4.24E-01 1.36E+01 6.18E+00 1.54E-02 7.01E-03

7.00 177.80 6355.2152 20.04798 4.48E-01 1.44E+01 6.53E+00 1.48E-02 6.71E-03

7.25 184.15 6493.372 20.48381 4.72E-01 1.52E+01 6.88E+00 1.41E-02 6.42E-03

7.50 190.50 6631.5289 20.91963 4.97E-01 1.60E+01 7.25E+00 1.35E-02 6.11E-03

7.75 196.85 6769.6857 21.35546 5.23E-01 1.68E+01 7.62E+00 1.28E-02 5.80E-03

8.00 203.20 6907.8426 21.79128 5.49E-01 1.76E+01 8.00E+00 1.21E-02 5.48E-03

8.25 209.55 7045.9994 22.22711 5.76E-01 1.85E+01 8.39E+00 1.14E-02 5.16E-03

8.50 215.90 7184.1563 22.66293 6.03E-01 1.94E+01 8.79E+00 1.06E-02 4.83E-03

8.75 222.25 7322.3131 23.09876 6.30E-01 2.03E+01 9.19E+00 9.90E-03 4.49E-03

9.00 228.60 7460.47 23.53459 6.59E-01 2.12E+01 9.61E+00 9.15E-03 4.15E-03

9.25 234.95 7045.9994 22.22711 6.86E-01 2.21E+01 1.00E+01 8.40E-03 3.81E-03

9.50 241.30 6631.5289 20.91963 7.13E-01 2.29E+01 1.04E+01 7.70E-03 3.49E-03

9.75 247.65 6217.0583 19.61215 7.37E-01 2.37E+01 1.07E+01 7.05E-03 3.20E-03

10.00 254.00 5802.5878 18.30468 7.60E-01 2.44E+01 1.11E+01 6.43E-03 2.92E-03

10.25 260.35 5388.1172 16.9972 7.81E-01 2.51E+01 1.14E+01 5.86E-03 2.66E-03

10.50 266.70 4973.6467 15.68972 8.01E-01 2.58E+01 1.17E+01 5.33E-03 2.42E-03

10.75 273.05 4559.1761 14.38225 8.19E-01 2.63E+01 1.20E+01 4.84E-03 2.19E-03

11.00 279.40 4144.7055 13.07477 8.36E-01 2.69E+01 1.22E+01 4.39E-03 1.99E-03

11.25 285.75 3730.235 11.76729 8.51E-01 2.74E+01 1.24E+01 3.99E-03 1.81E-03

11.50 292.10 3315.7644 10.45982 8.65E-01 2.78E+01 1.26E+01 3.63E-03 1.65E-03

11.75 298.45 2901.2939 9.152339 8.76E-01 2.82E+01 1.28E+01 3.31E-03 1.50E-03

12.00 304.80 2486.8233 7.844862 8.87E-01 2.85E+01 1.29E+01 3.04E-03 1.38E-03

Results for RBHT Test 1560

Valid Time Period 2220 to 2310 seconds
A-31

Figure A-25 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1560D for Time Period 2220 to 2310 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-32

RBHT Two-Phase Mixture Level and Uncovery Test INT-1566-A 

Test Conditions

Date: 5/28/2003

Steady-state time window: 500 – 700 seconds

Inlet flow rate: 2.068 cm/sec (0.814 in./sec) 

Inlet mass flow rate: 0.101 kg/sec (0.223 lbm/sec) 

Inlet flow temperature: 369.4 K (205.3 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.84 kW 
A-33

Figure A-26 Inlet Flow Plot for Experiment 1566A 

Figure A-27 Inlet Temperature Plot for Experiment 1566A 
A-34

 

Figure A-28 System Pressure Plot for Experiment 1566A 

Figure A-29 Bundle Power Plot for Experiment 1566A 
A-35

Table A-11: Data Results for RBHT Test 1566 for Time Period 500 to 700 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.771 13.108 627.613 0.787 37.682 0.189 9.049 0.000 0.000 12.13 580.788 2892.13 138475.9277 0.788 0.784 0.792

* 120-133 3048-3378 383 0.773 15.320 733.541 0.872 41.752 0.338 16.184 -2.930 -140.274 17.04 815.880 2909.17 139291.8073 0.748 0.744 0.752

* 108-120 2743-3048 382 0.641 22.373 1071.219 0.729 34.905 0.422 20.205 0.512 24.508 20.71 991.600 2929.88 140283.4074 0.668 0.665 0.671

100-108 2540-2743 381 0.610 16.219 776.559 0.436 20.876 0.309 14.795 0.000 0.000 15.47 740.708 2945.35 141024.115 0.628 0.625 0.631

97-100 2464-2540 380 0.540 7.162 342.899 0.153 7.326 0.112 5.363 0.000 0.000 6.896 330.182 2952.246 141354.2972 0.557 0.554 0.560

93-97 2362-2464 379 0.542 9.519 455.790 0.195 9.337 0.146 6.991 0.000 0.000 9.177 439.397 2961.423 141793.6943 0.558 0.555 0.561

* 85-93 2159-2362 378 0.416 24.279 1162.476 0.360 17.237 0.279 13.359 5.480 262.375 18.16 869.505 2979.583 142663.1998 0.563 0.560 0.566

81-85 2057-2159 377 0.553 9.286 444.600 0.165 7.900 0.134 6.416 0.000 0.000 8.983 430.108 2988.566 143093.3081 0.567 0.564 0.57078-81 1981-2057 376 0.413 9.140 437.638 0.117 5.602 0.098 4.692 0.000 0.000 8.921 427.140 2997.487 143520.4479 0.427 0.425 0.42975-78 1905-1981 375 0.452 8.533 408.545 0.112 5.363 0.096 4.597 0.000 0.000 8.322 398.459 3005.809 143918.9074 0.466 0.464 0.46872-75 1829-1905 374 0.434 8.823 422.470 0.107 5.123 0.093 4.453 0.000 0.000 8.619 412.680 3014.428 144331.5873 0.447 0.445 0.449

* 67-72 1702-1829 373 0.355 16.738 801.425 0.166 7.948 0.151 7.230 2.591 124.063 13.83 662.184 3028.258 144993.7713 0.467 0.465 0.469

63-67 1600-1702 372 0.477 10.875 520.690 0.123 5.889 0.116 5.554 0.000 0.000 10.63 508.967 3038.888 145502.7384 0.488 0.486 0.49060-63 1524-1600 371 0.356 10.039 480.656 0.086 4.118 0.085 4.070 0.000 0.000 9.865 472.339 3048.753 145975.0772 0.367 0.365 0.36957-60 1448-1524 370 0.361 9.956 476.677 0.081 3.878 0.082 3.926 0.000 0.000 9.791 468.796 3058.544 146443.8728 0.371 0.369 0.37353-57 1346-1448 369 0.325 14.022 671.377 0.099 4.740 0.106 5.075 0.000 0.000 13.81 661.226 3072.354 147105.0991 0.335 0.333 0.337

* 46-53 1168-1346 368 0.217 28.449 1362.148 0.151 7.230 0.177 8.475 3.801 181.996 24.32 1164.448 3096.674 148269.547 0.331 0.329 0.333

43-46 1092-1168 367 0.318 10.620 508.506 0.056 2.681 0.072 3.447 0.000 0.000 10.49 502.264 3107.164 148771.8109 0.327 0.325 0.32937-43 940-1092 366 0.261 23.038 1103.047 0.096 4.597 0.138 6.607 0.000 0.000 22.8 1091.670 3129.964 149863.4807 0.268 0.267 0.269

* 25-37 635-940 365 0.124 54.572 2612.898 0.122 5.841 0.249 11.922 1.781 85.251 52.42 2509.883 3182.384 152373.3638 0.159 0.158 0.160

13-25 330-635 364 0.047 59.375 2842.907 0.040 1.915 0.068 3.256 0.000 0.000 59.25 2836.905 3241.634 155210.269 0.049 0.047 0.051

* 0-13 0-330 363 0.032 65.337 3128.366 0.003 0.144 0.000 0.000 -0.506 -24.214 65.84 3152.436 3307.474 158362.7051 0.025 0.024 0.026

Results for RBHT Test 1566

Valid Time Period 500 to 700 seconds

Collapsed Liquid Level = 77.069 inches = 1957.56 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-11 Data Results for RBHT Test 1566

A for Time Period 500 to 700 seconds
A-36

Table A-12 Energy Balance Results for RBHT Test 1566A for Time Period 500 to 700 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2474.4321 7.805773 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

0.25 6.35 2611.9006 8.239427 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

0.50 12.70 2749.369 8.673081 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

0.75 19.05 2886.8375 9.106735 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

1.00 25.40 3024.3059 9.540389 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

1.25 31.75 3161.7744 9.974043 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

1.50 38.10 3299.2428 10.4077 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

1.75 44.45 3436.7113 10.84135 0.00E+00 0.00E+00 0.00E+00 7.08E-02 3.21E-02

2.00 50.80 3574.1797 11.27501 4.41E-03 3.73E-01 1.69E-01 7.05E-02 3.20E-02

2.25 57.15 3711.6482 11.70866 9.68E-03 8.18E-01 3.71E-01 7.01E-02 3.18E-02

2.50 63.50 3849.1166 12.14231 1.52E-02 1.28E+00 5.80E-01 6.97E-02 3.16E-02

2.75 69.85 3986.5851 12.57597 2.08E-02 1.76E+00 7.97E-01 6.93E-02 3.14E-02

3.00 76.20 4124.0535 13.00962 2.67E-02 2.25E+00 1.02E+00 6.89E-02 3.12E-02

3.25 82.55 4261.522 13.44328 3.28E-02 2.77E+00 1.25E+00 6.85E-02 3.11E-02

3.50 88.90 4398.9904 13.87693 3.90E-02 3.29E+00 1.49E+00 6.80E-02 3.08E-02

3.75 95.25 4536.4589 14.31058 4.55E-02 3.84E+00 1.74E+00 6.76E-02 3.06E-02

4.00 101.60 4673.9273 14.74424 5.22E-02 4.40E+00 2.00E+00 6.71E-02 3.04E-02

4.25 107.95 4811.3958 15.17789 5.90E-02 4.98E+00 2.26E+00 6.66E-02 3.02E-02

4.50 114.30 4948.8642 15.61155 6.61E-02 5.58E+00 2.53E+00 6.61E-02 3.00E-02

4.75 120.65 5086.3327 16.0452 7.33E-02 6.19E+00 2.81E+00 6.56E-02 2.97E-02

5.00 127.00 5223.8011 16.47885 8.08E-02 6.82E+00 3.09E+00 6.51E-02 2.95E-02

5.25 133.35 5361.2696 16.91251 8.84E-02 7.47E+00 3.39E+00 6.45E-02 2.93E-02

5.50 139.70 5498.738 17.34616 9.63E-02 8.13E+00 3.69E+00 6.40E-02 2.90E-02

5.75 146.05 5636.2065 17.77982 1.04E-01 8.82E+00 4.00E+00 6.34E-02 2.88E-02

6.00 152.40 5773.6749 18.21347 1.13E-01 9.51E+00 4.31E+00 6.28E-02 2.85E-02

6.25 158.75 5911.1434 18.64712 1.21E-01 1.02E+01 4.64E+00 6.22E-02 2.82E-02

6.50 165.10 6048.6118 19.08078 1.30E-01 1.10E+01 4.97E+00 6.16E-02 2.79E-02

6.75 171.45 6186.0803 19.51443 1.39E-01 1.17E+01 5.31E+00 6.10E-02 2.77E-02

7.00 177.80 6323.5488 19.94809 1.48E-01 1.25E+01 5.65E+00 6.03E-02 2.74E-02

7.25 184.15 6461.0172 20.38174 1.57E-01 1.32E+01 6.01E+00 5.97E-02 2.71E-02

7.50 190.50 6598.4857 20.81539 1.66E-01 1.40E+01 6.37E+00 5.90E-02 2.68E-02

7.75 196.85 6735.9541 21.24905 1.76E-01 1.49E+01 6.74E+00 5.83E-02 2.65E-02

8.00 203.20 6873.4226 21.6827 1.86E-01 1.57E+01 7.12E+00 5.76E-02 2.61E-02

8.25 209.55 7010.891 22.11636 1.96E-01 1.65E+01 7.50E+00 5.69E-02 2.58E-02

8.50 215.90 7148.3595 22.55001 2.06E-01 1.74E+01 7.89E+00 5.62E-02 2.55E-02

8.75 222.25 7285.8279 22.98366 2.17E-01 1.83E+01 8.29E+00 5.55E-02 2.52E-02

9.00 228.60 7423.2964 23.41732 2.27E-01 1.92E+01 8.70E+00 5.47E-02 2.48E-02

9.25 234.95 7010.891 22.11636 2.38E-01 2.01E+01 9.10E+00 5.40E-02 2.45E-02

9.50 241.30 6598.4857 20.81539 2.48E-01 2.09E+01 9.48E+00 5.33E-02 2.42E-02

9.75 247.65 6186.0803 19.51443 2.57E-01 2.17E+01 9.83E+00 5.26E-02 2.39E-02

10.00 254.00 5773.6749 18.21347 2.65E-01 2.24E+01 1.02E+01 5.20E-02 2.36E-02

10.25 260.35 5361.2696 16.91251 2.73E-01 2.31E+01 1.05E+01 5.14E-02 2.33E-02

10.50 266.70 4948.8642 15.61155 2.81E-01 2.37E+01 1.08E+01 5.09E-02 2.31E-02

10.75 273.05 4536.4589 14.31058 2.88E-01 2.43E+01 1.10E+01 5.04E-02 2.29E-02

11.00 279.40 4124.0535 13.00962 2.94E-01 2.48E+01 1.13E+01 5.00E-02 2.27E-02

11.25 285.75 3711.6482 11.70866 3.00E-01 2.53E+01 1.15E+01 4.96E-02 2.25E-02

11.50 292.10 3299.2428 10.4077 3.05E-01 2.57E+01 1.17E+01 4.92E-02 2.23E-02

11.75 298.45 2886.8375 9.106735 3.09E-01 2.61E+01 1.18E+01 4.89E-02 2.22E-02

12.00 304.80 2474.4321 7.805773 3.13E-01 2.64E+01 1.20E+01 4.86E-02 2.21E-02

Results for RBHT Test 1566

Valid Time Period 500 to 700 seconds
A-37

Figure A-30 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1566A for Time Period 500 to 700 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-38

RBHT Two-Phase Mixture Level and Uncovery Test INT-1566-B 

Test Conditions

Date: 5/28/2003

Steady-state time window: 3300 – 3400 seconds

Inlet flow rate: 1.516 cm/sec (0.597 in./sec) 

Inlet mass flow rate: 0.074 kg/sec (0.164 lbm/sec) 

Inlet flow temperature: 369.4 K (205.3 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.84 kW 
A-39

Figure A-31 Inlet Flow Plot for Experiment 1566B 

Figure A-32 Inlet Temperature Plot for Experiment 1566B 
A-40

Figure A-33 System Pressure Plot for Experiment 1566B 

Figure A-34 Bundle Power Plot for Experiment 1566B 
A-41

Table A-13: Data Results for RBHT Test 1566 for Time Period 3300 to 3400 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.793 11.810 565.448 0.596 28.537 0.141 6.751 0.000 0.000 11.07 530.034 2891.1 138425.1746 0.806 0.802 0.810

* 120-133 3048-3378 383 0.826 11.778 563.956 0.660 31.601 0.252 12.066 -1.954 -93.535 12.82 613.825 2903.9 139038.9995 0.81 0.806 0.814

* 108-120 2743-3048 382 0.754 15.341 734.536 0.551 26.382 0.314 15.034 3.116 149.200 11.36 543.920 2915.3 139582.9192 0.818 0.814 0.822

100-108 2540-2743 381 0.808 7.977 381.939 0.330 15.800 0.230 11.012 0.000 0.000 7.417 355.128 2922.7 139938.0471 0.821 0.817 0.825

97-100 2464-2540 380 0.750 3.895 186.493 0.116 5.554 0.083 3.974 0.000 0.000 3.697 177.013 2926.4 140115.0604 0.763 0.759 0.767

93-97 2362-2464 379 0.752 5.152 246.669 0.147 7.038 0.108 5.171 0.000 0.000 4.896 234.422 2931.3 140349.4821 0.764 0.760 0.768

* 85-93 2159-2362 378 0.594 16.878 808.138 0.273 13.071 0.208 9.959 6.955 333.023 9.442 452.085 2940.7 140801.5675 0.773 0.769 0.777

81-85 2057-2159 377 0.770 4.773 228.517 0.126 6.033 0.100 4.788 0.000 0.000 4.546 217.664 2945.2 141019.2312 0.781 0.777 0.785

78-81 1981-2057 376 0.633 5.718 273.772 0.090 4.309 0.073 3.495 0.000 0.000 5.552 265.831 2950.8 141285.0624 0.644 0.641 0.647

75-78 1905-1981 375 0.669 5.162 247.166 0.086 4.118 0.071 3.399 0.000 0.000 5.002 239.497 2955.8 141524.5594 0.679 0.676 0.682

72-75 1829-1905 374 0.653 5.401 258.604 0.082 3.926 0.070 3.352 0.000 0.000 5.245 251.132 2961 141775.6913 0.663 0.660 0.666

* 67-72 1702-1829 373 0.528 12.246 586.336 0.128 6.129 0.112 5.363 4.214 201.761 7.792 373.083 2968.8 142148.7743 0.7 0.697 0.704

63-67 1600-1702 372 0.728 5.656 270.789 0.095 4.549 0.087 4.166 0.000 0.000 5.473 262.049 2974.3 142410.823 0.737 0.733 0.741

60-63 1524-1600 371 0.578 6.575 314.801 0.067 3.208 0.063 3.016 0.000 0.000 6.444 308.540 2980.8 142719.3633 0.586 0.583 0.589

57-60 1448-1524 370 0.571 6.684 320.023 0.064 3.064 0.061 2.921 0.000 0.000 6.558 313.999 2987.3 143033.3621 0.579 0.576 0.582

53-57 1346-1448 369 0.534 9.680 463.498 0.079 3.783 0.079 3.783 0.000 0.000 9.519 455.772 2996.8 143489.1342 0.542 0.539 0.545

* 46-53 1168-1346 368 0.361 23.235 1112.496 0.124 5.937 0.132 6.320 6.559 314.045 16.42 786.194 3013.3 144275.328 0.548 0.545 0.551

43-46 1092-1168 367 0.548 7.037 336.932 0.047 2.250 0.054 2.586 0.000 0.000 6.932 331.906 3020.2 144607.234 0.555 0.552 0.558

37-43 940-1092 366 0.512 15.216 728.568 0.083 3.974 0.103 4.932 0.000 0.000 15.03 719.640 3035.2 145326.8743 0.518 0.515 0.521

* 25-37 635-940 365 0.276 45.120 2160.340 0.124 5.937 0.185 8.858 4.871 233.208 39.94 1912.337 3075.2 147239.2117 0.359 0.357 0.361

13-25 330-635 364 0.197 50.053 2396.566 0.060 2.873 0.159 7.613 0.000 0.000 49.82 2385.394 3125 149624.6061 0.2 0.199 0.201

* 0-13 0-330 363 0.036 65.093 3116.679 0.005 0.239 0.003 0.144 4.355 208.528 60.73 2907.768 3185.7 152532.3741 0.1 0.095 0.105

Results for RBHT Test 1566

Valid Time Period 3300 to 3400 seconds

Collapsed Liquid Level = 64.703 inches = 1643.45 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-13 Data Results for RBHT Test 1566

B for Time Period 3300 to 3400 seconds
A-42

Table A-14 Energy Balance Results for RBHT Test 1566B for Time Period 3300 to 3400 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2479.7591 7.822577 0.00E+00 0.00E+00 0.00E+00 5.26E-02 2.39E-02

0.25 6.35 2617.5235 8.257165 0.00E+00 0.00E+00 0.00E+00 5.26E-02 2.39E-02

0.50 12.70 2755.2879 8.691752 0.00E+00 0.00E+00 0.00E+00 5.26E-02 2.39E-02

0.75 19.05 2893.0523 9.12634 0.00E+00 0.00E+00 0.00E+00 5.26E-02 2.39E-02

1.00 25.40 3030.8167 9.560928 0.00E+00 0.00E+00 0.00E+00 5.26E-02 2.39E-02

1.25 31.75 3168.5811 9.995515 4.50E-03 2.83E-01 1.28E-01 5.24E-02 2.37E-02

1.50 38.10 3306.3455 10.4301 1.08E-02 6.78E-01 3.08E-01 5.20E-02 2.36E-02

1.75 44.45 3444.1099 10.86469 1.74E-02 1.09E+00 4.95E-01 5.17E-02 2.34E-02

2.00 50.80 3581.8743 11.29928 2.42E-02 1.52E+00 6.89E-01 5.13E-02 2.33E-02

2.25 57.15 3719.6387 11.73387 3.13E-02 1.97E+00 8.92E-01 5.09E-02 2.31E-02

2.50 63.50 3857.403 12.16845 3.87E-02 2.43E+00 1.10E+00 5.06E-02 2.29E-02

2.75 69.85 3995.1674 12.60304 4.64E-02 2.91E+00 1.32E+00 5.02E-02 2.27E-02

3.00 76.20 4132.9318 13.03763 5.43E-02 3.40E+00 1.54E+00 4.97E-02 2.26E-02

3.25 82.55 4270.6962 13.47222 6.24E-02 3.92E+00 1.78E+00 4.93E-02 2.24E-02

3.50 88.90 4408.4606 13.9068 7.09E-02 4.45E+00 2.02E+00 4.89E-02 2.22E-02

3.75 95.25 4546.225 14.34139 7.96E-02 4.99E+00 2.27E+00 4.84E-02 2.20E-02

4.00 101.60 4683.9894 14.77598 8.86E-02 5.56E+00 2.52E+00 4.79E-02 2.17E-02

4.25 107.95 4821.7538 15.21057 9.79E-02 6.14E+00 2.78E+00 4.74E-02 2.15E-02

4.50 114.30 4959.5182 15.64515 1.07E-01 6.74E+00 3.06E+00 4.69E-02 2.13E-02

4.75 120.65 5097.2826 16.07974 1.17E-01 7.35E+00 3.34E+00 4.64E-02 2.11E-02

5.00 127.00 5235.047 16.51433 1.27E-01 7.98E+00 3.62E+00 4.59E-02 2.08E-02

5.25 133.35 5372.8114 16.94892 1.38E-01 8.63E+00 3.91E+00 4.54E-02 2.06E-02

5.50 139.70 5510.5758 17.3835 1.48E-01 9.29E+00 4.21E+00 4.48E-02 2.03E-02

5.75 146.05 5648.3402 17.81809 1.59E-01 9.98E+00 4.53E+00 4.42E-02 2.01E-02

6.00 152.40 5786.1046 18.25268 1.70E-01 1.07E+01 4.84E+00 4.36E-02 1.98E-02

6.25 158.75 5923.869 18.68727 1.82E-01 1.14E+01 5.17E+00 4.30E-02 1.95E-02

6.50 165.10 6061.6334 19.12186 1.93E-01 1.21E+01 5.50E+00 4.24E-02 1.92E-02

6.75 171.45 6199.3978 19.55644 2.05E-01 1.29E+01 5.84E+00 4.18E-02 1.90E-02

7.00 177.80 6337.1622 19.99103 2.17E-01 1.36E+01 6.18E+00 4.12E-02 1.87E-02

7.25 184.15 6474.9265 20.42562 2.30E-01 1.44E+01 6.54E+00 4.05E-02 1.84E-02

7.50 190.50 6612.6909 20.86021 2.43E-01 1.52E+01 6.90E+00 3.98E-02 1.81E-02

7.75 196.85 6750.4553 21.29479 2.56E-01 1.60E+01 7.27E+00 3.91E-02 1.78E-02

8.00 203.20 6888.2197 21.72938 2.69E-01 1.69E+01 7.65E+00 3.85E-02 1.74E-02

8.25 209.55 7025.9841 22.16397 2.82E-01 1.77E+01 8.04E+00 3.77E-02 1.71E-02

8.50 215.90 7163.7485 22.59856 2.96E-01 1.86E+01 8.43E+00 3.70E-02 1.68E-02

8.75 222.25 7301.5129 23.03314 3.10E-01 1.95E+01 8.83E+00 3.63E-02 1.65E-02

9.00 228.60 7439.2773 23.46773 3.25E-01 2.04E+01 9.24E+00 3.55E-02 1.61E-02

9.25 234.95 7025.9841 22.16397 3.39E-01 2.13E+01 9.64E+00 3.48E-02 1.58E-02

9.50 241.30 6612.6909 20.86021 3.52E-01 2.21E+01 1.00E+01 3.41E-02 1.55E-02

9.75 247.65 6199.3978 19.55644 3.65E-01 2.29E+01 1.04E+01 3.34E-02 1.52E-02

10.00 254.00 5786.1046 18.25268 3.76E-01 2.36E+01 1.07E+01 3.28E-02 1.49E-02

10.25 260.35 5372.8114 16.94892 3.87E-01 2.43E+01 1.10E+01 3.22E-02 1.46E-02

10.50 266.70 4959.5182 15.64515 3.97E-01 2.49E+01 1.13E+01 3.17E-02 1.44E-02

10.75 273.05 4546.225 14.34139 4.06E-01 2.55E+01 1.16E+01 3.12E-02 1.42E-02

11.00 279.40 4132.9318 13.03763 4.15E-01 2.60E+01 1.18E+01 3.08E-02 1.40E-02

11.25 285.75 3719.6387 11.73387 4.22E-01 2.65E+01 1.20E+01 3.04E-02 1.38E-02

11.50 292.10 3306.3455 10.4301 4.29E-01 2.69E+01 1.22E+01 3.00E-02 1.36E-02

11.75 298.45 2893.0523 9.12634 4.35E-01 2.73E+01 1.24E+01 2.97E-02 1.35E-02

12.00 304.80 2479.7591 7.822577 4.41E-01 2.76E+01 1.25E+01 2.94E-02 1.33E-02

Results for RBHT Test 1566

Valid Time Period 3300 to 3400 seconds
A-43

Figure A-35 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1566B for Time Period 3300 to 3400 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-44

RBHT Two-Phase Mixture Level and Uncovery Test INT-1566-C 

Test Conditions

Date: 5/28/2003

Steady-state time window: 4110 – 4220 seconds

Inlet flow rate: 1.013 cm/sec (0.399 in./sec) 

Inlet mass flow rate: 0.049 kg/sec (0.109 lbm/sec) 

Inlet flow temperature: 369.4 K (205.3 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.84 kW 
A-45

Figure A-36 Inlet Flow Plot for Experiment 1566C 

Figure A-37 Inlet Temperature Plot for Experiment 1566C 
A-46

Figure A-38 System Pressure Plot for Experiment 1566C 

Figure A-39 Bundle Power Plot for Experiment 1566C 
A-47

Table A-15: Data Results for RBHT Test 1566 for Time Period 4110 to 4220 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.828 9.836 470.958 0.400 19.152 0.094 4.501 0.000 0.000 9.34 447.202 2889.34 138342.3418 0.836 0.832 0.840

* 120-133 3048-3378 383 0.856 9.717 465.239 0.442 21.163 0.168 8.044 -1.883 -90.172 10.99 526.204 2900.33 138868.5458 0.837 0.833 0.841

* 108-120 2743-3048 382 0.783 13.555 648.997 0.368 17.620 0.210 10.055 2.927 140.126 10.05 481.197 2910.38 139349.7424 0.839 0.835 0.843

100-108 2540-2743 381 0.830 7.047 337.429 0.219 10.486 0.153 7.326 0.000 0.000 6.673 319.505 2917.053 139669.2473 0.839 0.835 0.843

97-100 2464-2540 380 0.771 3.573 171.077 0.076 3.639 0.055 2.633 0.000 0.000 3.438 164.612 2920.491 139833.8596 0.779 0.775 0.783

93-97 2362-2464 379 0.770 4.788 229.263 0.097 4.644 0.072 3.447 0.000 0.000 4.618 221.111 2925.109 140054.9707 0.778 0.774 0.782

* 85-93 2159-2362 378 0.620 15.798 756.418 0.180 8.618 0.139 6.655 6.527 312.520 8.952 428.624 2934.061 140483.5947 0.785 0.781 0.789

81-85 2057-2159 377 0.784 4.482 214.592 0.083 3.974 0.066 3.160 0.000 0.000 4.333 207.465 2938.394 140691.0599 0.791 0.787 0.79578-81 1981-2057 376 0.646 5.510 263.826 0.059 2.825 0.049 2.346 0.000 0.000 5.398 258.458 2943.792 140949.5175 0.653 0.650 0.65675-78 1905-1981 375 0.681 4.975 238.214 0.056 2.681 0.047 2.250 0.000 0.000 4.872 233.273 2948.664 141182.7901 0.687 0.684 0.69072-75 1829-1905 374 0.669 5.152 246.669 0.054 2.586 0.046 2.202 0.000 0.000 5.047 241.652 2953.711 141424.4418 0.676 0.673 0.679

* 67-72 1702-1829 373 0.545 11.815 565.697 0.084 4.022 0.075 3.591 4.192 200.706 7.464 357.378 2961.175 141781.82 0.712 0.708 0.716

63-67 1600-1702 372 0.743 5.334 255.372 0.062 2.969 0.058 2.777 0.000 0.000 5.213 249.600 2966.388 142031.4198 0.749 0.745 0.75360-63 1524-1600 371 0.605 6.149 294.411 0.044 2.107 0.042 2.011 0.000 0.000 6.06 290.154 2972.448 142321.5742 0.611 0.608 0.61457-60 1448-1524 370 0.599 6.242 298.887 0.042 2.011 0.041 1.963 0.000 0.000 6.159 294.895 2978.607 142616.4687 0.605 0.602 0.60853-57 1346-1448 369 0.557 9.213 441.119 0.052 2.490 0.053 2.538 0.000 0.000 9.106 435.998 2987.713 143052.4663 0.562 0.559 0.565

* 46-53 1168-1346 368 0.378 22.622 1083.154 0.082 3.926 0.088 4.213 6.592 315.634 15.86 759.381 3003.573 143811.8472 0.564 0.561 0.567

43-46 1092-1168 367 0.561 6.840 327.483 0.031 1.484 0.036 1.724 0.000 0.000 6.768 324.054 3010.341 144135.9007 0.565 0.562 0.56837-43 940-1092 366 0.546 14.147 677.344 0.056 2.681 0.068 3.256 0.000 0.000 14.02 671.281 3024.361 144807.1819 0.55 0.547 0.553

* 25-37 635-940 365 0.304 43.359 2076.045 0.086 4.118 0.124 5.937 7.099 339.907 36.05 1726.083 3060.411 146533.2652 0.421 0.419 0.423

13-25 330-635 364 0.290 44.226 2117.571 0.050 2.394 0.106 5.075 0.000 0.000 44.06 2109.604 3104.471 148642.8693 0.293 0.292 0.294

* 0-13 0-330 363 0.045 64.491 3087.835 0.019 0.910 0.034 1.628 6.828 326.915 57.61 2758.382 3162.081 151401.2509 0.146 0.145 0.147

Results for RBHT Test 1566

Valid Time Period 4110 to 4220 seconds

Collapsed Liquid Level = 60.290 inches = 1531.37 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-15 Data Results for RBHT Test 1566

C for Time Period 4110 to 4220 seconds
A-48

Table A-16 Energy Balance Results for RBHT Test 1566C for Time Period 4110 to 4220 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2480.1405 7.82378 0.00E+00 0.00E+00 0.00E+00 3.51E-02 1.59E-02

0.25 6.35 2617.9261 8.258435 0.00E+00 0.00E+00 0.00E+00 3.51E-02 1.59E-02

0.50 12.70 2755.7117 8.693089 0.00E+00 0.00E+00 0.00E+00 3.51E-02 1.59E-02

0.75 19.05 2893.4973 9.127744 1.02E-03 4.25E-02 1.93E-02 3.50E-02 1.59E-02

1.00 25.40 3031.2829 9.562398 9.66E-03 4.05E-01 1.84E-01 3.47E-02 1.58E-02

1.25 31.75 3169.0685 9.997053 1.87E-02 7.83E-01 3.55E-01 3.44E-02 1.56E-02

1.50 38.10 3306.854 10.43171 2.82E-02 1.18E+00 5.35E-01 3.41E-02 1.55E-02

1.75 44.45 3444.6396 10.86636 3.80E-02 1.59E+00 7.22E-01 3.37E-02 1.53E-02

2.00 50.80 3582.4252 11.30102 4.83E-02 2.02E+00 9.17E-01 3.34E-02 1.51E-02

2.25 57.15 3720.2108 11.73567 5.89E-02 2.47E+00 1.12E+00 3.30E-02 1.50E-02

2.50 63.50 3857.9964 12.17032 7.00E-02 2.93E+00 1.33E+00 3.26E-02 1.48E-02

2.75 69.85 3995.782 12.60498 8.15E-02 3.41E+00 1.55E+00 3.22E-02 1.46E-02

3.00 76.20 4133.5676 13.03963 9.33E-02 3.91E+00 1.77E+00 3.18E-02 1.44E-02

3.25 82.55 4271.3531 13.47429 1.06E-01 4.42E+00 2.01E+00 3.14E-02 1.42E-02

3.50 88.90 4409.1387 13.90894 1.18E-01 4.95E+00 2.24E+00 3.09E-02 1.40E-02

3.75 95.25 4546.9243 14.3436 1.31E-01 5.50E+00 2.49E+00 3.05E-02 1.38E-02

4.00 101.60 4684.7099 14.77825 1.45E-01 6.06E+00 2.75E+00 3.00E-02 1.36E-02

4.25 107.95 4822.4955 15.21291 1.59E-01 6.64E+00 3.01E+00 2.95E-02 1.34E-02

4.50 114.30 4960.2811 15.64756 1.73E-01 7.24E+00 3.28E+00 2.90E-02 1.32E-02

4.75 120.65 5098.0667 16.08222 1.88E-01 7.85E+00 3.56E+00 2.85E-02 1.29E-02

5.00 127.00 5235.8522 16.51687 2.03E-01 8.49E+00 3.85E+00 2.80E-02 1.27E-02

5.25 133.35 5373.6378 16.95152 2.18E-01 9.14E+00 4.14E+00 2.74E-02 1.24E-02

5.50 139.70 5511.4234 17.38618 2.34E-01 9.80E+00 4.45E+00 2.69E-02 1.22E-02

5.75 146.05 5649.209 17.82083 2.50E-01 1.05E+01 4.76E+00 2.63E-02 1.19E-02

6.00 152.40 5786.9946 18.25549 2.67E-01 1.12E+01 5.07E+00 2.57E-02 1.17E-02

6.25 158.75 5924.7802 18.69014 2.84E-01 1.19E+01 5.40E+00 2.51E-02 1.14E-02

6.50 165.10 6062.5658 19.1248 3.02E-01 1.26E+01 5.73E+00 2.45E-02 1.11E-02

6.75 171.45 6200.3513 19.55945 3.20E-01 1.34E+01 6.07E+00 2.39E-02 1.08E-02

7.00 177.80 6338.1369 19.99411 3.38E-01 1.41E+01 6.42E+00 2.32E-02 1.05E-02

7.25 184.15 6475.9225 20.42876 3.57E-01 1.49E+01 6.77E+00 2.26E-02 1.02E-02

7.50 190.50 6613.7081 20.86341 3.76E-01 1.57E+01 7.13E+00 2.19E-02 9.94E-03

7.75 196.85 6751.4937 21.29807 3.95E-01 1.65E+01 7.50E+00 2.12E-02 9.63E-03

8.00 203.20 6889.2793 21.73272 4.15E-01 1.74E+01 7.88E+00 2.05E-02 9.31E-03

8.25 209.55 7027.0648 22.16738 4.35E-01 1.82E+01 8.27E+00 1.98E-02 8.99E-03

8.50 215.90 7164.8504 22.60203 4.56E-01 1.91E+01 8.66E+00 1.91E-02 8.65E-03

8.75 222.25 7302.636 23.03669 4.77E-01 2.00E+01 9.06E+00 1.83E-02 8.32E-03

9.00 228.60 7440.4216 23.47134 4.99E-01 2.09E+01 9.47E+00 1.76E-02 7.98E-03

9.25 234.95 7027.0648 22.16738 5.20E-01 2.18E+01 9.87E+00 1.68E-02 7.64E-03

9.50 241.30 6613.7081 20.86341 5.40E-01 2.26E+01 1.02E+01 1.61E-02 7.32E-03

9.75 247.65 6200.3513 19.55945 5.58E-01 2.34E+01 1.06E+01 1.55E-02 7.03E-03

10.00 254.00 5786.9946 18.25549 5.76E-01 2.41E+01 1.09E+01 1.49E-02 6.75E-03

10.25 260.35 5373.6378 16.95152 5.92E-01 2.48E+01 1.12E+01 1.43E-02 6.49E-03

10.50 266.70 4960.2811 15.64756 6.07E-01 2.54E+01 1.15E+01 1.38E-02 6.25E-03

10.75 273.05 4546.9243 14.3436 6.21E-01 2.60E+01 1.18E+01 1.33E-02 6.03E-03

11.00 279.40 4133.5676 13.03963 6.34E-01 2.65E+01 1.20E+01 1.28E-02 5.83E-03

11.25 285.75 3720.2108 11.73567 6.45E-01 2.70E+01 1.23E+01 1.24E-02 5.64E-03

11.50 292.10 3306.854 10.43171 6.56E-01 2.74E+01 1.24E+01 1.21E-02 5.48E-03

11.75 298.45 2893.4973 9.127744 6.65E-01 2.78E+01 1.26E+01 1.18E-02 5.34E-03

12.00 304.80 2480.1405 7.82378 6.72E-01 2.82E+01 1.28E+01 1.15E-02 5.21E-03

Results for RBHT Test 1566

Valid Time Period 4110 to 4220 seconds
A-49

Figure A-40 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1566C for Time Period 4110 to 4220 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-50

RBHT Two-Phase Mixture Level and Uncovery Test INT-1566-D 

Test Conditions

Date: 5/28/2003

Steady-state time window: 4380 – 4460 seconds

Inlet flow rate: 0.744 cm/sec (0.293 in./sec) 

Inlet mass flow rate: 0.036 kg/sec (0.080 lbm/sec) 

Inlet flow temperature: 369.4 K (205.3 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.84 kW 
A-51

Figure A-41 Inlet Flow Plot for Experiment 1566D 

Figure A-42 Inlet Temperature Plot for Experiment 1566D 
A-52

Figure A-43 System Pressure Plot for Experiment 1566D 

Figure A-44 Bundle Power Plot for Experiment 1566D 
A-53

Table A-17: Data Results for RBHT Test 1566 for Time Period 4380 to 4460 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.866 7.672 367.342 0.282 13.521 0.069 3.310 0.000 0.000 7.318 350.388 2887.3 138245.5279 0.872 0.868 0.876

* 120-133 3048-3378 383 0.892 7.286 348.839 0.320 15.307 0.123 5.908 -1.936 -92.717 8.779 420.341 2896.1 138665.8687 0.870 0.866 0.874

* 108-120 2743-3048 382 0.812 11.736 561.929 0.269 12.889 0.154 7.378 2.969 142.148 8.344 399.513 2904.4 139065.3815 0.866 0.862 0.870

100-108 2540-2743 381 0.858 5.918 283.378 0.161 7.699 0.113 5.396 0.000 0.000 5.643 270.188 2910.1 139335.5698 0.864 0.860 0.868

97-100 2464-2540 380 0.795 3.195 152.988 0.056 2.688 0.041 1.953 0.000 0.000 3.097 148.285 2913.2 139483.855 0.801 0.797 0.805

93-97 2362-2464 379 0.788 4.408 211.041 0.071 3.420 0.053 2.544 0.000 0.000 4.282 205.023 2917.5 139688.8782 0.794 0.790 0.798

* 85-93 2159-2362 378 0.640 14.945 715.585 0.132 6.296 0.102 4.884 6.244 298.955 8.468 405.450 2925.9 140094.3282 0.796 0.792 0.800

81-85 2057-2159 377 0.793 4.297 205.750 0.060 2.884 0.049 2.339 0.000 0.000 4.187 200.475 2930.1 140294.8029 0.798 0.794 0.80278-81 1981-2057 376 0.659 5.319 254.659 0.043 2.052 0.036 1.710 0.000 0.000 5.238 250.797 2935.4 140545.5997 0.664 0.660 0.66775-78 1905-1981 375 0.688 4.854 232.423 0.041 1.959 0.035 1.671 0.000 0.000 4.777 228.724 2940.1 140774.3237 0.693 0.690 0.69772-75 1829-1905 374 0.677 5.035 241.085 0.039 1.868 0.034 1.633 0.000 0.000 4.96 237.486 2945.1 141011.8097 0.682 0.678 0.685

* 67-72 1702-1829 373 0.559 11.458 548.609 0.061 2.919 0.055 2.636 3.999 191.469 7.343 351.585 2952.4 141363.3945 0.717 0.714 0.721

63-67 1600-1702 372 0.749 5.224 250.127 0.045 2.163 0.042 2.032 0.000 0.000 5.135 245.865 2957.6 141609.2596 0.753 0.749 0.75660-63 1524-1600 371 0.616 5.986 286.613 0.032 1.525 0.031 1.479 0.000 0.000 5.921 283.499 2963.5 141892.7586 0.620 0.617 0.62357-60 1448-1524 370 0.611 6.060 290.165 0.030 1.444 0.030 1.441 0.000 0.000 5.998 287.186 2969.5 142179.9444 0.615 0.612 0.61853-57 1346-1448 369 0.574 8.852 423.846 0.038 1.801 0.039 1.861 0.000 0.000 8.773 420.053 2978.3 142599.9979 0.578 0.575 0.580

* 46-53 1168-1346 368 0.394 22.014 1054.024 0.059 2.823 0.065 3.093 6.130 293.515 15.76 754.593 2994 143354.5907 0.566 0.563 0.569

43-46 1092-1168 367 0.552 6.984 334.414 0.023 1.083 0.026 1.262 0.000 0.000 6.933 331.954 3001 143686.5445 0.555 0.552 0.55837-43 940-1092 366 0.564 13.587 650.558 0.041 1.945 0.050 2.408 0.000 0.000 13.49 645.905 3014.4 144332.4492 0.567 0.564 0.570

* 25-37 635-940 365 0.316 42.603 2039.829 0.063 3.033 0.091 4.354 7.958 381.052 34.49 1651.390 3048.9 145983.8393 0.446 0.444 0.449

13-25 330-635 364 0.324 42.122 2016.821 0.039 1.848 0.078 3.739 0.000 0.000 41.99 2010.492 3090.9 147994.3312 0.326 0.324 0.328

* 0-13 0-330 363 0.059 63.515 3041.137 0.017 0.800 0.037 1.789 6.971 333.791 56.49 2704.756 3147.4 150699.087 0.163 0.162 0.164

Results for RBHT Test 1566

Valid Time Period 4380 to 4460 seconds

Collapsed Liquid Level = 57.720 inches = 1531.37 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-17 Data Results for RBHT Test 1566

D for Time Period 4380 to 4460 seconds
A-54

Table A-18 Energy Balance Results for RBHT Test 1566D for Time Period 4380 to 4460 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2480.3081 7.824309 0.00E+00 0.00E+00 0.00E+00 2.58E-02 1.17E-02

0.25 6.35 2618.103 8.258993 0.00E+00 0.00E+00 0.00E+00 2.58E-02 1.17E-02

0.50 12.70 2755.8979 8.693677 0.00E+00 0.00E+00 0.00E+00 2.58E-02 1.17E-02

0.75 19.05 2893.6928 9.12836 9.67E-03 2.98E-01 1.35E-01 2.55E-02 1.16E-02

1.00 25.40 3031.4877 9.563044 2.14E-02 6.59E-01 2.99E-01 2.52E-02 1.15E-02

1.25 31.75 3169.2826 9.997728 3.37E-02 1.04E+00 4.71E-01 2.49E-02 1.13E-02

1.50 38.10 3307.0775 10.43241 4.66E-02 1.43E+00 6.50E-01 2.46E-02 1.12E-02

1.75 44.45 3444.8724 10.8671 6.00E-02 1.85E+00 8.37E-01 2.42E-02 1.10E-02

2.00 50.80 3582.6673 11.30178 7.39E-02 2.28E+00 1.03E+00 2.39E-02 1.08E-02

2.25 57.15 3720.4621 11.73646 8.84E-02 2.72E+00 1.23E+00 2.35E-02 1.07E-02

2.50 63.50 3858.257 12.17115 1.04E-01 3.19E+00 1.44E+00 2.31E-02 1.05E-02

2.75 69.85 3996.0519 12.60583 1.19E-01 3.67E+00 1.66E+00 2.27E-02 1.03E-02

3.00 76.20 4133.8468 13.04051 1.35E-01 4.16E+00 1.89E+00 2.23E-02 1.01E-02

3.25 82.55 4271.6417 13.4752 1.52E-01 4.67E+00 2.12E+00 2.19E-02 9.92E-03

3.50 88.90 4409.4366 13.90988 1.69E-01 5.20E+00 2.36E+00 2.14E-02 9.72E-03

3.75 95.25 4547.2315 14.34457 1.87E-01 5.75E+00 2.61E+00 2.10E-02 9.51E-03

4.00 101.60 4685.0264 14.77925 2.05E-01 6.31E+00 2.86E+00 2.05E-02 9.30E-03

4.25 107.95 4822.8213 15.21393 2.24E-01 6.90E+00 3.13E+00 2.00E-02 9.08E-03

4.50 114.30 4960.6162 15.64862 2.44E-01 7.49E+00 3.40E+00 1.95E-02 8.85E-03

4.75 120.65 5098.4111 16.0833 2.64E-01 8.11E+00 3.68E+00 1.90E-02 8.62E-03

5.00 127.00 5236.206 16.51799 2.84E-01 8.74E+00 3.96E+00 1.85E-02 8.38E-03

5.25 133.35 5374.0009 16.95267 3.05E-01 9.39E+00 4.26E+00 1.79E-02 8.13E-03

5.50 139.70 5511.7958 17.38735 3.27E-01 1.01E+01 4.56E+00 1.74E-02 7.88E-03

5.75 146.05 5649.5907 17.82204 3.49E-01 1.07E+01 4.87E+00 1.68E-02 7.62E-03

6.00 152.40 5787.3856 18.25672 3.72E-01 1.14E+01 5.19E+00 1.62E-02 7.35E-03

6.25 158.75 5925.1805 18.6914 3.95E-01 1.21E+01 5.51E+00 1.56E-02 7.08E-03

6.50 165.10 6062.9754 19.12609 4.19E-01 1.29E+01 5.84E+00 1.50E-02 6.80E-03

6.75 171.45 6200.7702 19.56077 4.43E-01 1.36E+01 6.18E+00 1.44E-02 6.52E-03

7.00 177.80 6338.5651 19.99546 4.68E-01 1.44E+01 6.53E+00 1.37E-02 6.23E-03

7.25 184.15 6476.36 20.43014 4.93E-01 1.52E+01 6.88E+00 1.31E-02 5.93E-03

7.50 190.50 6614.1549 20.86482 5.19E-01 1.60E+01 7.25E+00 1.24E-02 5.63E-03

7.75 196.85 6751.9498 21.29951 5.46E-01 1.68E+01 7.62E+00 1.17E-02 5.32E-03

8.00 203.20 6889.7447 21.73419 5.73E-01 1.76E+01 7.99E+00 1.10E-02 5.00E-03

8.25 209.55 7027.5396 22.16888 6.00E-01 1.85E+01 8.38E+00 1.03E-02 4.68E-03

8.50 215.90 7165.3345 22.60356 6.29E-01 1.93E+01 8.77E+00 9.58E-03 4.35E-03

8.75 222.25 7303.1294 23.03824 6.57E-01 2.02E+01 9.17E+00 8.84E-03 4.01E-03

9.00 228.60 7440.9243 23.47293 6.87E-01 2.11E+01 9.58E+00 8.09E-03 3.67E-03

9.25 234.95 7027.5396 22.16888 7.15E-01 2.20E+01 9.98E+00 7.35E-03 3.33E-03

9.50 241.30 6614.1549 20.86482 7.42E-01 2.28E+01 1.04E+01 6.65E-03 3.02E-03

9.75 247.65 6200.7702 19.56077 7.68E-01 2.36E+01 1.07E+01 5.99E-03 2.72E-03

10.00 254.00 5787.3856 18.25672 7.92E-01 2.44E+01 1.10E+01 5.38E-03 2.44E-03

10.25 260.35 5374.0009 16.95267 8.14E-01 2.50E+01 1.14E+01 4.81E-03 2.18E-03

10.50 266.70 4960.6162 15.64862 8.34E-01 2.57E+01 1.16E+01 4.28E-03 1.94E-03

10.75 273.05 4547.2315 14.34457 8.53E-01 2.63E+01 1.19E+01 3.79E-03 1.72E-03

11.00 279.40 4133.8468 13.04051 8.70E-01 2.68E+01 1.21E+01 3.35E-03 1.52E-03

11.25 285.75 3720.4621 11.73646 8.86E-01 2.73E+01 1.24E+01 2.94E-03 1.34E-03

11.50 292.10 3307.0775 10.43241 9.00E-01 2.77E+01 1.26E+01 2.58E-03 1.17E-03

11.75 298.45 2893.6928 9.12836 9.12E-01 2.81E+01 1.27E+01 2.27E-03 1.03E-03

12.00 304.80 2480.3081 7.824309 9.23E-01 2.84E+01 1.29E+01 1.99E-03 9.03E-04

Results for RBHT Test 1566

Valid Time Period 4380 to 4460 seconds
A-55

Figure A-45 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1566D for Time Period 4380 to 4460 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-56

RBHT Two-Phase Mixture Level and Uncovery Test INT-1566-E 

Test Conditions

Date: 5/28/2003

Steady-state time window: 4600 – 4650 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.025 kg/sec (0.055 lbm/sec) 

Inlet flow temperature: 369.4 K (205.3 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 76.84 kW 
A-57

Figure A-46 Inlet Flow Plot for Experiment 1566E 

Figure A-47 Inlet Temperature Plot for Experiment 1566E 
A-58

Figure A-48 System Pressure Plot for Experiment 1566E 

Figure A-49 Bundle Power Plot for Experiment 1566E 
A-59

Table A-19: Data Results for RBHT Test 1566 for Time Period 4600 to 4650 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.939 3.505 167.844 0.085 4.070 0.000 0.000 0.000 0.000 3.416 163.559 2883.4 138058.6991 0.94 0.935 0.945

* 120-133 3048-3378 383 0.958 2.856 136.762 0.101 4.836 0.000 0.000 -2.009 -96.176 4.764 228.102 2888.2 138286.8007 0.929 0.924 0.934

* 108-120 2743-3048 382 0.896 6.497 311.071 0.093 4.453 0.000 0.000 0.664 31.786 5.74 274.833 2893.9 138561.6333 0.908 0.903 0.913

100-108 2540-2743 381 0.893 4.440 212.603 0.099 4.740 0.064 3.064 0.000 0.000 4.274 204.640 2898.2 138766.2736 0.897 0.893 0.901

97-100 2464-2540 380 0.812 2.929 140.243 0.037 1.772 0.028 1.341 0.000 0.000 2.864 137.129 2901.1 138903.4026 0.816 0.812 0.820

93-97 2362-2464 379 0.782 4.534 217.078 0.048 2.298 0.037 1.772 0.000 0.000 4.446 212.876 2905.5 139116.2782 0.786 0.782 0.790

* 85-93 2159-2362 378 0.663 13.996 670.133 0.090 4.309 0.070 3.352 4.305 206.126 9.531 456.347 2915 139572.625 0.771 0.767 0.775

81-85 2057-2159 377 0.752 5.162 247.166 0.041 1.963 0.034 1.628 0.000 0.000 5.085 243.471 2920.1 139816.0961 0.755 0.751 0.75978-81 1981-2057 376 0.607 6.123 293.168 0.029 1.389 0.025 1.197 0.000 0.000 6.067 290.490 2926.2 140106.5856 0.611 0.608 0.61475-78 1905-1981 375 0.639 5.630 269.545 0.028 1.341 0.024 1.149 0.000 0.000 5.575 266.932 2931.8 140373.518 0.642 0.639 0.64572-75 1829-1905 374 0.616 5.978 286.205 0.027 1.293 0.023 1.101 0.000 0.000 5.927 283.786 2937.7 140657.3043 0.619 0.616 0.622

* 67-72 1702-1829 373 0.501 12.957 620.402 0.042 2.011 0.038 1.819 3.278 156.969 9.599 459.603 2947.3 141116.9069 0.63 0.627 0.633

63-67 1600-1702 372 0.638 7.515 359.808 0.031 1.484 0.029 1.389 0.000 0.000 7.454 356.899 2954.7 141473.8063 0.641 0.638 0.64460-63 1524-1600 371 0.525 7.406 354.586 0.022 1.053 0.021 1.005 0.000 0.000 7.362 352.494 2962.1 141826.3008 0.527 0.524 0.53057-60 1448-1524 370 0.526 7.385 353.592 0.021 1.005 0.021 1.005 0.000 0.000 7.34 351.441 2969.4 142177.7419 0.529 0.526 0.53253-57 1346-1448 369 0.492 10.558 505.522 0.026 1.245 0.027 1.293 0.000 0.000 10.5 502.743 2979.9 142680.4846 0.494 0.492 0.496

* 46-53 1168-1346 368 0.339 24.040 1151.038 0.040 1.915 0.044 2.107 5.206 249.261 18.75 897.755 2998.7 143578.2394 0.484 0.482 0.486

43-46 1092-1168 367 0.472 8.226 393.874 0.015 0.718 0.018 0.862 0.000 0.000 8.192 392.235 3006.9 143970.4744 0.474 0.472 0.476

37-43 940-1092 366 0.479 16.240 777.553 0.028 1.341 0.035 1.676 0.000 0.000 16.17 774.224 3023.1 144744.6982 0.481 0.479 0.483

* 25-37 635-940 365 0.331 41.708 1996.972 0.044 2.107 0.063 3.016 5.411 259.063 36.19 1732.787 3059.2 146477.4847 0.419 0.417 0.421

13-25 330-635 364 0.356 40.129 1921.380 0.028 1.341 0.054 2.586 0.000 0.000 40.03 1916.647 3099.3 148394.1314 0.357 0.355 0.359

* 0-13 0-330 363 0.083 61.879 2962.760 0.013 0.622 0.037 1.772 6.399 306.363 55.43 2654.003 3154.7 151048.134 0.179 0.178 0.180

 (Z2φ) Two-Phase Level (Dryout) = 112.70 inches = 2862.58 mm

 (S) Level Swell = 2.303

Results for RBHT Test 1566

Valid Time Period 4600 to 4650 seconds

Collapsed Liquid Level = 50.794 inches = 1466.09 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-19 Data Results for RBHT Test 1566

E for Time Period 4600 to 4650 seconds
A-60

Table A-20 Energy Balance Results for RBHT Test 1566E for Time Period 4600 to 4650 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2473.6942 7.803445 0.00E+00 0.00E+00 0.00E+00 1.76E-02 7.98E-03

0.25 6.35 2611.1217 8.23697 0.00E+00 0.00E+00 0.00E+00 1.76E-02 7.98E-03

0.50 12.70 2748.5491 8.670494 1.42E-02 3.00E-01 1.36E-01 1.74E-02 7.87E-03

0.75 19.05 2885.9766 9.104019 3.05E-02 6.48E-01 2.94E-01 1.71E-02 7.74E-03

1.00 25.40 3023.404 9.537544 4.77E-02 1.01E+00 4.59E-01 1.68E-02 7.60E-03

1.25 31.75 3160.8315 9.971069 6.57E-02 1.39E+00 6.32E-01 1.64E-02 7.46E-03

1.50 38.10 3298.2589 10.40459 8.45E-02 1.79E+00 8.13E-01 1.61E-02 7.31E-03

1.75 44.45 3435.6864 10.83812 1.04E-01 2.21E+00 1.00E+00 1.58E-02 7.15E-03

2.00 50.80 3573.1138 11.27164 1.24E-01 2.64E+00 1.20E+00 1.54E-02 6.99E-03

2.25 57.15 3710.5413 11.70517 1.46E-01 3.09E+00 1.40E+00 1.50E-02 6.82E-03

2.50 63.50 3847.9688 12.13869 1.68E-01 3.56E+00 1.61E+00 1.47E-02 6.65E-03

2.75 69.85 3985.3962 12.57222 1.90E-01 4.04E+00 1.83E+00 1.43E-02 6.46E-03

3.00 76.20 4122.8237 13.00574 2.14E-01 4.54E+00 2.06E+00 1.38E-02 6.28E-03

3.25 82.55 4260.2511 13.43927 2.38E-01 5.06E+00 2.29E+00 1.34E-02 6.08E-03

3.50 88.90 4397.6786 13.87279 2.63E-01 5.59E+00 2.54E+00 1.30E-02 5.88E-03

3.75 95.25 4535.106 14.30632 2.89E-01 6.14E+00 2.79E+00 1.25E-02 5.67E-03

4.00 101.60 4672.5335 14.73984 3.16E-01 6.71E+00 3.04E+00 1.20E-02 5.46E-03

4.25 107.95 4809.9609 15.17337 3.44E-01 7.30E+00 3.31E+00 1.16E-02 5.24E-03

4.50 114.30 4947.3884 15.60689 3.72E-01 7.90E+00 3.58E+00 1.11E-02 5.01E-03

4.75 120.65 5084.8159 16.04041 4.01E-01 8.52E+00 3.86E+00 1.05E-02 4.78E-03

5.00 127.00 5222.2433 16.47394 4.31E-01 9.15E+00 4.15E+00 1.00E-02 4.54E-03

5.25 133.35 5359.6708 16.90746 4.62E-01 9.81E+00 4.45E+00 9.47E-03 4.30E-03

5.50 139.70 5497.0982 17.34099 4.94E-01 1.05E+01 4.75E+00 8.91E-03 4.04E-03

5.75 146.05 5634.5257 17.77451 5.26E-01 1.12E+01 5.06E+00 8.34E-03 3.78E-03

6.00 152.40 5771.9531 18.20804 5.59E-01 1.19E+01 5.38E+00 7.76E-03 3.52E-03

6.25 158.75 5909.3806 18.64156 5.93E-01 1.26E+01 5.71E+00 7.16E-03 3.25E-03

6.50 165.10 6046.808 19.07509 6.28E-01 1.33E+01 6.04E+00 6.55E-03 2.97E-03

6.75 171.45 6184.2355 19.50861 6.63E-01 1.41E+01 6.39E+00 5.93E-03 2.69E-03

7.00 177.80 6321.663 19.94214 7.00E-01 1.49E+01 6.74E+00 5.29E-03 2.40E-03

7.25 184.15 6459.0904 20.37566 7.37E-01 1.56E+01 7.09E+00 4.63E-03 2.10E-03

7.50 190.50 6596.5179 20.80919 7.75E-01 1.64E+01 7.46E+00 3.96E-03 1.80E-03

7.75 196.85 6733.9453 21.24271 8.14E-01 1.73E+01 7.83E+00 3.28E-03 1.49E-03

8.00 203.20 6871.3728 21.67624 8.53E-01 1.81E+01 8.21E+00 2.59E-03 1.17E-03

8.25 209.55 7008.8002 22.10976 8.93E-01 1.90E+01 8.60E+00 1.88E-03 8.51E-04

8.50 215.90 7146.2277 22.54329 9.35E-01 1.98E+01 9.00E+00 1.15E-03 5.22E-04

8.75 222.25 7283.6551 22.97681 9.77E-01 2.07E+01 9.40E+00 4.14E-04 1.88E-04

9.00 228.60 7421.0826 23.41033 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

9.25 234.95 7008.8002 22.10976 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

9.50 241.30 6596.5179 20.80919 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

9.75 247.65 6184.2355 19.50861 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

10.00 254.00 5771.9531 18.20804 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

10.25 260.35 5359.6708 16.90746 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

10.50 266.70 4947.3884 15.60689 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

10.75 273.05 4535.106 14.30632 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

11.00 279.40 4122.8237 13.00574 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

11.25 285.75 3710.5413 11.70517 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

11.50 292.10 3298.2589 10.40459 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

11.75 298.45 2885.9766 9.104019 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

12.00 304.80 2473.6942 7.803445 1.00E+00 2.12E+01 9.63E+00 0.00E+00 0.00E+00

Results for RBHT Test 1566

Valid Time Period 4600 to 4650 seconds
A-61

Figure A-50 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1566E for Time Period 4600 to 4650 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-62

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-A 

Test Conditions

Date: 6/5/2003

Steady-state time window: 11384 – 11516 seconds

Inlet flow rate: 2.543 cm/sec (1.001 in./sec) 

Inlet mass flow rate: 0.124 kg/sec (0.274 lbm/sec) 

Inlet flow temperature: 382.0 K (228.0 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.15 kW 
A-63

Figure A-51 Inlet Flow Plot for Experiment 1572A 

Figure A-52 Inlet Temperature Plot for Experiment 1572A 
A-64

Figure A-53 System Pressure Plot for Experiment 1572A 

Figure A-54 Bundle Power Plot for Experiment 1572A 
A-65

Table A-21: Data Results for RBHT Test 1572 for Time Period 11384 to 11516 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.745 14.541 696.242 0.801 38.352 0.174 8.331 0.000 0.000 13.56 649.256 4333.56 207491.9665 0.763 0.759 0.767

* 120-133 3048-3378 383 0.753 16.650 797.197 0.890 42.613 0.310 14.843 -0.400 -19.161 15.85 758.902 4349.41 208250.8686 0.765 0.761 0.769

* 108-120 2743-3048 382 0.685 19.605 938.684 0.747 35.767 0.387 18.530 4.161 199.221 14.31 685.166 4363.72 208936.0351 0.77 0.766 0.774

100-108 2540-2743 381 0.755 10.169 486.872 0.449 21.498 0.283 13.550 0.000 0.000 9.436 451.798 4373.156 209387.8332 0.773 0.769 0.777

97-100 2464-2540 380 0.674 5.079 243.187 0.158 7.565 0.102 4.884 0.000 0.000 4.815 230.543 4377.971 209618.3766 0.691 0.688 0.694

93-97 2362-2464 379 0.681 6.637 317.785 0.201 9.624 0.133 6.368 0.000 0.000 6.302 301.741 4384.273 209920.118 0.697 0.694 0.700

* 85-93 2159-2362 378 0.509 20.415 977.475 0.373 17.859 0.256 12.257 7.946 380.456 11.84 566.902 4396.113 210487.0202 0.715 0.711 0.719

81-85 2057-2159 377 0.719 5.832 279.243 0.172 8.235 0.123 5.889 0.000 0.000 5.533 264.921 4401.646 210751.9417 0.734 0.730 0.738

78-81 1981-2057 376 0.617 5.967 285.708 0.122 5.841 0.090 4.309 0.000 0.000 5.751 275.359 4407.397 211027.3011 0.631 0.628 0.634

75-78 1905-1981 375 0.592 6.357 304.357 0.117 5.602 0.088 4.213 0.000 0.000 6.147 294.320 4413.544 211321.621 0.605 0.602 0.608

72-75 1829-1905 374 0.562 6.819 326.488 0.112 5.363 0.086 4.118 0.000 0.000 6.617 316.824 4420.161 211638.4447 0.575 0.572 0.578

* 67-72 1702-1829 373 0.463 13.934 667.149 0.174 8.331 0.138 6.607 3.821 182.936 9.801 469.274 4429.962 212107.7191 0.622 0.619 0.625

63-67 1600-1702 372 0.659 7.094 339.667 0.129 6.177 0.107 5.123 0.000 0.000 6.859 328.411 4436.821 212436.1297 0.67 0.667 0.673

60-63 1524-1600 371 0.484 8.039 384.923 0.090 4.309 0.078 3.735 0.000 0.000 7.869 376.770 4444.69 212812.8995 0.495 0.493 0.497

57-60 1448-1524 370 0.479 8.117 388.652 0.085 4.070 0.075 3.591 0.000 0.000 7.953 380.792 4452.643 213193.6912 0.489 0.487 0.491

53-57 1346-1448 369 0.444 11.560 553.513 0.105 5.027 0.098 4.692 0.000 0.000 11.35 543.441 4463.993 213737.1321 0.453 0.451 0.455

* 46-53 1168-1346 368 0.317 24.840 1189.331 0.162 7.757 0.162 7.757 5.766 276.063 18.75 897.755 4482.743 214634.8869 0.484 0.482 0.486

43-46 1092-1168 367 0.507 7.686 368.014 0.060 2.873 0.066 3.160 0.000 0.000 7.558 361.879 4490.301 214996.7659 0.515 0.512 0.518

37-43 940-1092 366 0.397 18.784 899.396 0.104 4.980 0.126 6.033 0.000 0.000 18.55 888.179 4508.851 215884.9447 0.405 0.403 0.407

* 25-37 635-940 365 0.217 48.797 2336.390 0.140 6.703 0.228 10.917 1.139 54.513 47.29 2264.257 4556.141 218149.202 0.241 0.240 0.242

13-25 330-635 364 0.075 57.641 2759.855 0.053 2.538 0.092 4.405 0.000 0.000 57.48 2752.157 4613.621 220901.3592 0.077 0.073 0.081

* 0-13 0-330 363 0.043 64.579 3092.062 0.005 0.239 0.000 0.000 -0.306 -14.649 64.88 3106.471 4678.501 224007.8303 0.039 0.037 0.041

Results for RBHT Test 1572

Valid Time Period 11384 to 11516 seconds

Collapsed Liquid Level = 74.439 inches = 1890.75 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-21 Data Results for RBHT Test 1572

A for Time Period 11384 to 11516 seconds
A-66

Table A-22 Energy Balance Results for RBHT Test 1572A for Time Period 11384 to 11516 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2621.0984 8.268442 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.25 6.35 2766.7149 8.7278 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.50 12.70 2912.3315 9.187158 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.75 19.05 3057.9481 9.646516 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.00 25.40 3203.5647 10.10587 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.25 31.75 3349.1812 10.56523 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.50 38.10 3494.7978 11.02459 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.75 44.45 3640.4144 11.48395 1.93E-03 1.39E-01 6.30E-02 8.89E-02 4.03E-02

2.00 50.80 3786.031 11.9433 6.31E-03 4.54E-01 2.06E-01 8.85E-02 4.01E-02

2.25 57.15 3931.6475 12.40266 1.09E-02 7.82E-01 3.55E-01 8.81E-02 3.99E-02

2.50 63.50 4077.2641 12.86202 1.56E-02 1.12E+00 5.09E-01 8.76E-02 3.98E-02

2.75 69.85 4222.8807 13.32138 2.05E-02 1.47E+00 6.69E-01 8.72E-02 3.96E-02

3.00 76.20 4368.4973 13.78074 2.56E-02 1.84E+00 8.34E-01 8.68E-02 3.94E-02

3.25 82.55 4514.1138 14.24009 3.08E-02 2.22E+00 1.01E+00 8.63E-02 3.91E-02

3.50 88.90 4659.7304 14.69945 3.62E-02 2.61E+00 1.18E+00 8.58E-02 3.89E-02

3.75 95.25 4805.347 15.15881 4.18E-02 3.01E+00 1.36E+00 8.53E-02 3.87E-02

4.00 101.60 4950.9636 15.61817 4.76E-02 3.42E+00 1.55E+00 8.48E-02 3.85E-02

4.25 107.95 5096.5801 16.07753 5.35E-02 3.85E+00 1.75E+00 8.43E-02 3.82E-02

4.50 114.30 5242.1967 16.53688 5.96E-02 4.29E+00 1.94E+00 8.37E-02 3.80E-02

4.75 120.65 5387.8133 16.99624 6.59E-02 4.74E+00 2.15E+00 8.32E-02 3.77E-02

5.00 127.00 5533.4299 17.4556 7.23E-02 5.20E+00 2.36E+00 8.26E-02 3.75E-02

5.25 133.35 5679.0464 17.91496 7.89E-02 5.68E+00 2.58E+00 8.20E-02 3.72E-02

5.50 139.70 5824.663 18.37432 8.57E-02 6.17E+00 2.80E+00 8.14E-02 3.69E-02

5.75 146.05 5970.2796 18.83367 9.27E-02 6.67E+00 3.02E+00 8.08E-02 3.66E-02

6.00 152.40 6115.8962 19.29303 9.98E-02 7.18E+00 3.26E+00 8.01E-02 3.64E-02

6.25 158.75 6261.5127 19.75239 1.07E-01 7.71E+00 3.50E+00 7.95E-02 3.61E-02

6.50 165.10 6407.1293 20.21175 1.15E-01 8.25E+00 3.74E+00 7.88E-02 3.58E-02

6.75 171.45 6552.7459 20.6711 1.22E-01 8.79E+00 3.99E+00 7.82E-02 3.55E-02

7.00 177.80 6698.3625 21.13046 1.30E-01 9.35E+00 4.24E+00 7.75E-02 3.51E-02

7.25 184.15 6843.979 21.58982 1.38E-01 9.93E+00 4.50E+00 7.67E-02 3.48E-02

7.50 190.50 6989.5956 22.04918 1.46E-01 1.05E+01 4.77E+00 7.60E-02 3.45E-02

7.75 196.85 7135.2122 22.50854 1.55E-01 1.11E+01 5.04E+00 7.53E-02 3.41E-02

8.00 203.20 7280.8288 22.96789 1.63E-01 1.17E+01 5.32E+00 7.45E-02 3.38E-02

8.25 209.55 7426.4454 23.42725 1.72E-01 1.24E+01 5.60E+00 7.37E-02 3.35E-02

8.50 215.90 7572.0619 23.88661 1.81E-01 1.30E+01 5.89E+00 7.30E-02 3.31E-02

8.75 222.25 7717.6785 24.34597 1.90E-01 1.36E+01 6.19E+00 7.22E-02 3.27E-02

9.00 228.60 7863.2951 24.80533 1.99E-01 1.43E+01 6.49E+00 7.13E-02 3.24E-02

9.25 234.95 7426.4454 23.42725 2.08E-01 1.50E+01 6.78E+00 7.05E-02 3.20E-02

9.50 241.30 6989.5956 22.04918 2.16E-01 1.56E+01 7.06E+00 6.98E-02 3.17E-02

9.75 247.65 6552.7459 20.6711 2.24E-01 1.61E+01 7.32E+00 6.91E-02 3.13E-02

10.00 254.00 6115.8962 19.29303 2.32E-01 1.67E+01 7.57E+00 6.84E-02 3.10E-02

10.25 260.35 5679.0464 17.91496 2.39E-01 1.72E+01 7.79E+00 6.78E-02 3.07E-02

10.50 266.70 5242.1967 16.53688 2.45E-01 1.76E+01 8.00E+00 6.72E-02 3.05E-02

10.75 273.05 4805.347 15.15881 2.51E-01 1.81E+01 8.20E+00 6.67E-02 3.02E-02

11.00 279.40 4368.4973 13.78074 2.57E-01 1.85E+01 8.37E+00 6.62E-02 3.00E-02

11.25 285.75 3931.6475 12.40266 2.61E-01 1.88E+01 8.53E+00 6.58E-02 2.98E-02

11.50 292.10 3494.7978 11.02459 2.66E-01 1.91E+01 8.68E+00 6.54E-02 2.97E-02

11.75 298.45 3057.9481 9.646516 2.70E-01 1.94E+01 8.80E+00 6.50E-02 2.95E-02

12.00 304.80 2621.0984 8.268442 2.73E-01 1.96E+01 8.91E+00 6.47E-02 2.94E-02

Results for RBHT Test 1572

Valid Time Period 11384 to 11516 seconds
A-67

Figure A-55 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572A for Time Period 11384 to 11516 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-68

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-B 

Test Conditions

Date: 6/5/2003

Steady-state time window: 11672 – 11750 seconds

Inlet flow rate: 2.560 cm/sec (1.008 in./sec) 

Inlet mass flow rate: 0.125 kg/sec (0.276 lbm/sec) 

Inlet flow temperature: 382.0 K (228.0 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.15 kW 
A-69

Figure A-56 Inlet Flow Plot for Experiment 1572B 

Figure A-57 Inlet Temperature Plot for Experiment 1572B 
A-70

Figure A-58 System Pressure Plot for Experiment 1572B 

Figure A-59 Bundle Power Plot for Experiment 1572B 
A-71

Table A-23: Data Results for RBHT Test 1572 for Time Period 11672 to 11750 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.747 14.437 691.269 0.806 38.591 0.174 8.331 0.000 0.000 13.45 643.989 4333.45 207486.6997 0.764 0.760 0.768

* 120-133 3048-3378 383 0.751 16.806 804.657 0.896 42.901 0.311 14.891 -0.141 -6.770 15.74 753.635 4349.19 208240.3349 0.767 0.763 0.771

* 108-120 2743-3048 382 0.683 19.750 945.646 0.752 36.006 0.389 18.625 4.369 209.200 14.24 681.815 4363.43 208922.1498 0.771 0.767 0.775

100-108 2540-2743 381 0.756 10.137 485.380 0.452 21.642 0.284 13.598 0.000 0.000 9.397 449.931 4372.827 209372.0806 0.774 0.770 0.778

97-100 2464-2540 380 0.673 5.100 244.182 0.159 7.613 0.103 4.932 0.000 0.000 4.835 231.501 4377.662 209603.5816 0.69 0.687 0.693

93-97 2362-2464 379 0.680 6.653 318.531 0.203 9.720 0.134 6.416 0.000 0.000 6.313 302.268 4383.975 209905.8497 0.696 0.693 0.699

* 85-93 2159-2362 378 0.509 20.410 977.226 0.375 17.955 0.257 12.305 7.948 380.542 11.83 566.423 4395.805 210472.2731 0.715 0.711 0.719

81-85 2057-2159 377 0.720 5.817 278.497 0.173 8.283 0.123 5.889 0.000 0.000 5.52 264.299 4401.325 210736.5721 0.734 0.730 0.73878-81 1981-2057 376 0.621 5.905 282.724 0.123 5.889 0.090 4.309 0.000 0.000 5.687 272.295 4407.012 211008.8672 0.635 0.632 0.63875-78 1905-1981 375 0.593 6.336 303.363 0.118 5.650 0.088 4.213 0.000 0.000 6.13 293.506 4413.142 211302.3731 0.606 0.603 0.60972-75 1829-1905 374 0.566 6.757 323.504 0.112 5.363 0.086 4.118 0.000 0.000 6.554 313.807 4419.696 211616.1803 0.579 0.576 0.582

* 67-72 1702-1829 373 0.459 14.058 673.117 0.175 8.379 0.139 6.655 4.043 193.596 9.701 464.486 4429.397 212080.6667 0.626 0.623 0.629

63-67 1600-1702 372 0.662 7.021 336.186 0.130 6.224 0.107 5.123 0.000 0.000 6.783 324.772 4436.18 212405.4385 0.673 0.670 0.67660-63 1524-1600 371 0.484 8.044 385.171 0.091 4.357 0.078 3.735 0.000 0.000 7.87 376.818 4444.05 212782.2561 0.495 0.493 0.49757-60 1448-1524 370 0.481 8.091 387.409 0.086 4.118 0.076 3.639 0.000 0.000 7.929 379.643 4451.979 213161.8987 0.491 0.489 0.49353-57 1346-1448 369 0.441 11.612 555.999 0.106 5.075 0.098 4.692 0.000 0.000 11.4 545.835 4463.379 213707.7336 0.451 0.449 0.453

* 46-53 1168-1346 368 0.313 24.975 1195.796 0.163 7.804 0.163 7.804 5.859 280.517 18.79 899.670 4482.169 214607.4036 0.483 0.481 0.485

43-46 1092-1168 367 0.507 7.686 368.014 0.061 2.921 0.066 3.160 0.000 0.000 7.556 361.783 4489.725 214969.1869 0.515 0.512 0.51837-43 940-1092 366 0.399 18.738 897.158 0.105 5.027 0.127 6.081 0.000 0.000 18.5 885.785 4508.225 215854.9716 0.406 0.404 0.408

* 25-37 635-940 365 0.227 48.163 2306.054 0.140 6.703 0.229 10.965 0.394 18.862 47.4 2269.524 4555.625 218124.4958 0.239 0.238 0.240

13-25 330-635 364 0.070 57.947 2774.526 0.053 2.538 0.090 4.309 0.000 0.000 57.79 2767.000 4613.415 220891.4958 0.072 0.068 0.076

* 0-13 0-330 363 0.043 64.589 3092.559 0.005 0.239 0.000 0.000 -0.466 -22.291 65.05 3114.611 4678.465 224006.1066 0.036 0.034 0.038

Results for RBHT Test 1572

Valid Time Period 11672 to 11750 seconds

Collapsed Liquid Level = 73.702 inches = 1872.04 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-23 Data Results for RBHT Test 1572

B for Time Period 11672 to 11750 seconds
A-72

Table A-24 Energy Balance Results for RBHT Test 1572B for Time Period 11672 to 11750 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2618.2014 8.259303 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

0.25 6.35 2763.6571 8.718153 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

0.50 12.70 2909.1127 9.177004 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

0.75 19.05 3054.5683 9.635854 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

1.00 25.40 3200.024 10.0947 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

1.25 31.75 3345.4796 10.55355 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

1.50 38.10 3490.9352 11.0124 0.00E+00 0.00E+00 0.00E+00 8.97E-02 4.07E-02

1.75 44.45 3636.3909 11.47125 1.77E-03 1.28E-01 5.81E-02 8.95E-02 4.06E-02

2.00 50.80 3781.8465 11.9301 6.11E-03 4.43E-01 2.01E-01 8.91E-02 4.04E-02

2.25 57.15 3927.3021 12.38895 1.06E-02 7.70E-01 3.49E-01 8.87E-02 4.02E-02

2.50 63.50 4072.7578 12.84781 1.53E-02 1.11E+00 5.03E-01 8.83E-02 4.00E-02

2.75 69.85 4218.2134 13.30666 2.02E-02 1.46E+00 6.63E-01 8.78E-02 3.98E-02

3.00 76.20 4363.6691 13.76551 2.52E-02 1.83E+00 8.28E-01 8.74E-02 3.96E-02

3.25 82.55 4509.1247 14.22436 3.04E-02 2.20E+00 9.99E-01 8.69E-02 3.94E-02

3.50 88.90 4654.5803 14.68321 3.58E-02 2.59E+00 1.18E+00 8.64E-02 3.92E-02

3.75 95.25 4800.036 15.14206 4.13E-02 2.99E+00 1.36E+00 8.59E-02 3.90E-02

4.00 101.60 4945.4916 15.60091 4.70E-02 3.41E+00 1.55E+00 8.54E-02 3.88E-02

4.25 107.95 5090.9472 16.05976 5.29E-02 3.83E+00 1.74E+00 8.49E-02 3.85E-02

4.50 114.30 5236.4029 16.51861 5.90E-02 4.27E+00 1.94E+00 8.44E-02 3.83E-02

4.75 120.65 5381.8585 16.97746 6.52E-02 4.72E+00 2.14E+00 8.38E-02 3.80E-02

5.00 127.00 5527.3141 17.43631 7.16E-02 5.19E+00 2.35E+00 8.32E-02 3.78E-02

5.25 133.35 5672.7698 17.89516 7.81E-02 5.66E+00 2.57E+00 8.26E-02 3.75E-02

5.50 139.70 5818.2254 18.35401 8.49E-02 6.15E+00 2.79E+00 8.20E-02 3.72E-02

5.75 146.05 5963.681 18.81286 9.18E-02 6.65E+00 3.02E+00 8.14E-02 3.69E-02

6.00 152.40 6109.1367 19.27171 9.89E-02 7.16E+00 3.25E+00 8.08E-02 3.66E-02

6.25 158.75 6254.5923 19.73056 1.06E-01 7.69E+00 3.49E+00 8.01E-02 3.64E-02

6.50 165.10 6400.0479 20.18941 1.14E-01 8.22E+00 3.73E+00 7.95E-02 3.60E-02

6.75 171.45 6545.5036 20.64826 1.21E-01 8.77E+00 3.98E+00 7.88E-02 3.57E-02

7.00 177.80 6690.9592 21.10711 1.29E-01 9.34E+00 4.24E+00 7.81E-02 3.54E-02

7.25 184.15 6836.4148 21.56596 1.37E-01 9.91E+00 4.50E+00 7.74E-02 3.51E-02

7.50 190.50 6981.8705 22.02481 1.45E-01 1.05E+01 4.76E+00 7.67E-02 3.48E-02

7.75 196.85 7127.3261 22.48366 1.53E-01 1.11E+01 5.03E+00 7.59E-02 3.44E-02

8.00 203.20 7272.7818 22.94251 1.62E-01 1.17E+01 5.31E+00 7.52E-02 3.41E-02

8.25 209.55 7418.2374 23.40136 1.70E-01 1.23E+01 5.59E+00 7.44E-02 3.37E-02

8.50 215.90 7563.693 23.86021 1.79E-01 1.30E+01 5.88E+00 7.36E-02 3.34E-02

8.75 222.25 7709.1487 24.31906 1.88E-01 1.36E+01 6.17E+00 7.28E-02 3.30E-02

9.00 228.60 7854.6043 24.77791 1.97E-01 1.43E+01 6.48E+00 7.20E-02 3.27E-02

9.25 234.95 7418.2374 23.40136 2.06E-01 1.49E+01 6.77E+00 7.12E-02 3.23E-02

9.50 241.30 6981.8705 22.02481 2.14E-01 1.55E+01 7.05E+00 7.04E-02 3.19E-02

9.75 247.65 6545.5036 20.64826 2.22E-01 1.61E+01 7.31E+00 6.97E-02 3.16E-02

10.00 254.00 6109.1367 19.27171 2.30E-01 1.66E+01 7.55E+00 6.91E-02 3.13E-02

10.25 260.35 5672.7698 17.89516 2.37E-01 1.71E+01 7.78E+00 6.84E-02 3.10E-02

10.50 266.70 5236.4029 16.51861 2.43E-01 1.76E+01 7.99E+00 6.79E-02 3.08E-02

10.75 273.05 4800.036 15.14206 2.49E-01 1.80E+01 8.18E+00 6.73E-02 3.05E-02

11.00 279.40 4363.6691 13.76551 2.54E-01 1.84E+01 8.36E+00 6.69E-02 3.03E-02

11.25 285.75 3927.3021 12.38895 2.59E-01 1.88E+01 8.52E+00 6.64E-02 3.01E-02

11.50 292.10 3490.9352 11.0124 2.64E-01 1.91E+01 8.66E+00 6.60E-02 2.99E-02

11.75 298.45 3054.5683 9.635854 2.67E-01 1.94E+01 8.79E+00 6.57E-02 2.98E-02

12.00 304.80 2618.2014 8.259303 2.71E-01 1.96E+01 8.90E+00 6.54E-02 2.97E-02

Results for RBHT Test 1572

Valid Time Period 11672 to 11750 seconds
A-73

Figure A-60 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572B for Time Period 11672 to 11750 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-74

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-C 

Test Conditions

Date: 6/5/2003

Steady-state time window: 12089 – 12210 seconds

Inlet flow rate: 2.537 cm/sec (0.999 in./sec) 

Inlet mass flow rate: 0.124 kg/sec (0.274 lbm/sec) 

Inlet flow temperature: 382.0 K (228.0 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.15 kW 
A-75

Figure A-61 Inlet Flow Plot for Experiment 1572C 

Figure A-62 Inlet Temperature Plot for Experiment 1572C 
A-76

Figure A-63 System Pressure Plot for Experiment 1572C 

Figure A-64 Bundle Power Plot for Experiment 1572C 
A-77

Table A-25: Data Results for RBHT Test 1572 for Time Period 12089 to 12210 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.751 14.209 680.328 0.799 38.256 0.173 8.283 0.000 0.000 13.23 633.456 4333.23 207476.166 0.768 0.764 0.772

* 120-133 3048-3378 383 0.752 16.769 802.917 0.888 42.518 0.309 14.795 -0.088 -4.201 15.66 749.805 4348.89 208225.9709 0.768 0.764 0.772

* 108-120 2743-3048 382 0.677 20.119 963.301 0.745 35.671 0.385 18.434 4.479 214.454 14.51 694.743 4363.4 208920.7134 0.767 0.763 0.771

100-108 2540-2743 381 0.749 10.423 499.057 0.448 21.450 0.282 13.502 0.000 0.000 9.69 463.960 4373.09 209384.6731 0.767 0.763 0.771

97-100 2464-2540 380 0.665 5.224 250.150 0.157 7.517 0.102 4.884 0.000 0.000 4.963 237.630 4378.053 209622.3028 0.681 0.678 0.684

93-97 2362-2464 379 0.674 6.782 324.747 0.201 9.624 0.133 6.368 0.000 0.000 6.446 308.636 4384.499 209930.9389 0.69 0.687 0.693

* 85-93 2159-2362 378 0.499 20.810 996.373 0.372 17.811 0.255 12.209 8.073 386.522 12.11 579.830 4396.609 210510.7688 0.708 0.704 0.712

81-85 2057-2159 377 0.713 5.962 285.459 0.171 8.188 0.122 5.841 0.000 0.000 5.666 271.290 4402.275 210782.0584 0.727 0.723 0.73178-81 1981-2057 376 0.607 6.128 293.416 0.122 5.841 0.089 4.261 0.000 0.000 5.915 283.212 4408.19 211065.2701 0.62 0.617 0.62375-78 1905-1981 375 0.581 6.533 312.812 0.117 5.602 0.087 4.166 0.000 0.000 6.327 302.938 4414.517 211368.2085 0.594 0.591 0.59772-75 1829-1905 374 0.548 7.047 337.429 0.111 5.315 0.085 4.070 0.000 0.000 6.847 327.836 4421.364 211696.0446 0.56 0.557 0.563

* 67-72 1702-1829 373 0.456 14.131 676.598 0.174 8.331 0.138 6.607 3.649 174.717 10.17 486.942 4431.534 212182.9868 0.608 0.605 0.611

63-67 1600-1702 372 0.645 7.375 353.094 0.129 6.177 0.106 5.075 0.000 0.000 7.138 341.769 4438.672 212524.7561 0.656 0.653 0.65960-63 1524-1600 371 0.479 8.117 388.652 0.090 4.309 0.077 3.687 0.000 0.000 7.945 380.409 4446.617 212905.1647 0.49 0.488 0.49257-60 1448-1524 370 0.470 8.257 395.366 0.085 4.070 0.075 3.591 0.000 0.000 8.094 387.543 4454.711 213292.7075 0.48 0.478 0.48253-57 1346-1448 369 0.433 11.784 564.205 0.105 5.027 0.097 4.644 0.000 0.000 11.58 554.453 4466.291 213847.1609 0.442 0.440 0.444

* 46-53 1168-1346 368 0.309 25.125 1203.007 0.162 7.757 0.162 7.757 5.641 270.108 19.16 917.386 4485.451 214764.5466 0.473 0.471 0.475

43-46 1092-1168 367 0.495 7.868 376.717 0.060 2.873 0.066 3.160 0.000 0.000 7.741 370.641 4493.192 215135.1877 0.503 0.500 0.50637-43 940-1092 366 0.389 19.054 912.326 0.104 4.980 0.126 6.033 0.000 0.000 18.82 901.106 4512.012 216036.2941 0.396 0.394 0.398

* 25-37 635-940 365 0.224 48.381 2316.498 0.140 6.703 0.227 10.869 0.374 17.910 47.64 2281.015 4559.652 218317.3096 0.235 0.234 0.236

13-25 330-635 364 0.072 57.802 2767.563 0.054 2.586 0.093 4.453 0.000 0.000 57.64 2759.818 4617.292 221077.1276 0.075 0.071 0.079

* 0-13 0-330 363 0.043 64.595 3092.808 0.004 0.192 0.000 0.000 -0.379 -18.164 64.97 3110.780 4682.262 224187.9079 0.037 0.035 0.039

Results for RBHT Test 1572

Valid Time Period 12089 to 12210 seconds

Collapsed Liquid Level = 74.098 inches = 1882.10 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-25 Data Results for RBHT Test 1572

C for Time Period 12089 to 12210 seconds
A-78

Table A-26 Energy Balance Results for RBHT Test 1572C for Time Period 12089 to 12210 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2616.6702 8.254473 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

0.25 6.35 2762.0408 8.713055 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

0.50 12.70 2907.4114 9.171637 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

0.75 19.05 3052.7819 9.630218 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

1.00 25.40 3198.1525 10.0888 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

1.25 31.75 3343.5231 10.54738 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

1.50 38.10 3488.8936 11.00596 0.00E+00 0.00E+00 0.00E+00 0.088872 0.040311

1.75 44.45 3634.2642 11.46455 2.12E-03 0.152313 0.069088 0.088684 0.040226

2.00 50.80 3779.6348 11.92313 6.50E-03 0.467212 0.211923 0.088294 0.040049

2.25 57.15 3925.0053 12.38171 1.11E-02 0.794613 0.360429 0.087889 0.039866

2.50 63.50 4070.3759 12.84029 1.58E-02 1.133725 0.514246 0.08747 0.039675

2.75 69.85 4215.7465 13.29887 2.07E-02 1.485768 0.67393 0.087034 0.039478

3.00 76.20 4361.117 13.75745 2.58E-02 1.850026 0.839153 0.086584 0.039273

3.25 82.55 4506.4876 14.21604 3.10E-02 2.226497 1.009917 0.086118 0.039062

3.50 88.90 4651.8582 14.67462 3.64E-02 2.615901 1.186546 0.085636 0.038844

3.75 95.25 4797.2287 15.1332 4.20E-02 3.0168 1.36839 0.08514 0.038619

4.00 101.60 4942.5993 15.59178 4.78E-02 3.430631 1.5561 0.084628 0.038387

4.25 107.95 5087.9699 16.05036 5.37E-02 3.856675 1.749349 0.084101 0.038148

4.50 114.30 5233.3404 16.50895 5.98E-02 4.294934 1.948139 0.083559 0.037902

4.75 120.65 5378.711 16.96753 6.61E-02 4.746125 2.152795 0.083001 0.037648

5.00 127.00 5524.0816 17.42611 7.25E-02 5.208811 2.362664 0.082429 0.037389

5.25 133.35 5669.4521 17.88469 7.91E-02 5.684429 2.5784 0.08184 0.037122

5.50 139.70 5814.8227 18.34327 8.59E-02 6.172261 2.799676 0.081237 0.036848

5.75 146.05 5960.1933 18.80186 9.29E-02 6.672307 3.026492 0.080618 0.036568

6.00 152.40 6105.5638 19.26044 1.00E-01 7.184567 3.258848 0.079985 0.03628

6.25 158.75 6250.9344 19.71902 1.07E-01 7.70904 3.496743 0.079336 0.035986

6.50 165.10 6396.305 20.1776 1.15E-01 8.247883 3.741157 0.078669 0.035684

6.75 171.45 6541.6755 20.63618 1.22E-01 8.79391 3.988829 0.077994 0.035377

7.00 177.80 6687.0461 21.09476 1.30E-01 9.36149 4.246278 0.077292 0.035059

7.25 184.15 6832.4167 21.55335 1.38E-01 9.929071 4.503727 0.07659 0.03474

7.50 190.50 6977.7872 22.01193 1.46E-01 10.51821 4.770953 0.075861 0.03441

7.75 196.85 7123.1578 22.47051 1.55E-01 11.11452 5.041437 0.075123 0.034075

8.00 203.20 7268.5284 22.92909 1.63E-01 11.7324 5.321698 0.074359 0.033729

8.25 209.55 7413.8989 23.38767 1.72E-01 12.35027 5.601959 0.073595 0.033382

8.50 215.90 7559.2695 23.84626 1.81E-01 12.9897 5.891996 0.072804 0.033023

8.75 222.25 7704.6401 24.30484 1.90E-01 13.63631 6.185293 0.072004 0.03266

9.00 228.60 7850.0106 24.76342 1.99E-01 14.29729 6.485107 0.071186 0.032289

9.25 234.95 7413.8989 23.38767 2.08E-01 14.9439 6.778403 0.070387 0.031927

9.50 241.30 6977.7872 22.01193 2.17E-01 15.55459 7.055405 0.069631 0.031584

9.75 247.65 6541.6755 20.63618 2.25E-01 16.12935 7.316113 0.06892 0.031262

10.00 254.00 6105.5638 19.26044 2.32E-01 16.66819 7.560526 0.068254 0.030959

10.25 260.35 5669.4521 17.88469 2.39E-01 17.17111 7.788646 0.067632 0.030677

10.50 266.70 5233.3404 16.50895 2.45E-01 17.63093 7.997212 0.067063 0.030419

10.75 273.05 4797.2287 15.1332 2.51E-01 18.05482 8.189484 0.066538 0.030181

11.00 279.40 4361.117 13.75745 2.57E-01 18.44997 8.368721 0.06605 0.029959

11.25 285.75 3925.0053 12.38171 2.62E-01 18.80201 8.528404 0.065614 0.029762

11.50 292.10 3488.8936 11.00596 2.66E-01 19.11095 8.668535 0.065232 0.029589

11.75 298.45 3052.7819 9.630218 2.70E-01 19.39115 8.79563 0.064885 0.029431

12.00 304.80 2616.6702 8.254473 2.73E-01 19.63542 8.90643 0.064583 0.029294

Results for RBHT Test 1572

Valid Time Period 12089 to 12210 seconds
A-79

Figure A-65 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572C for Time Period 12089 to 12210 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-80

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-D 

Test Conditions

Date: 6/5/2003

Steady-state time window: 12482 – 12575 seconds

Inlet flow rate: 2.525 cm/sec (0.994 in./sec) 

Inlet mass flow rate: 0.123 kg/sec (0.272 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-81

Figure A-66 Inlet Flow Plot for Experiment 1572D 

Figure A-67 Inlet Temperature Plot for Experiment 1572D 
A-82

Figure A-68: System Pressure Plot for Experiment 1572D 

Figure A-69 Bundle Power Plot for Experiment 1572D 
A-83

Table A-27: Data Results for RBHT Test 1572 for Time Period 12482 to 12575 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.611 22.227 1064.256 0.568 27.196 0.114 5.458 0.000 0.000 21.54 1031.341 4341.54 207874.051 0.623 0.620 0.626

* 120-133 3048-3378 383 0.656 23.240 1112.744 0.633 30.308 0.204 9.768 -2.797 -133.914 25.2 1206.582 4366.74 209080.6335 0.627 0.624 0.630

* 108-120 2743-3048 382 0.556 27.670 1324.850 0.531 25.424 0.254 12.162 4.085 195.594 22.8 1091.670 4389.54 210172.3033 0.634 0.631 0.637

100-108 2540-2743 381 0.626 15.559 744.979 0.319 15.274 0.186 8.906 0.000 0.000 15.05 720.598 4404.59 210892.9012 0.638 0.635 0.641

97-100 2464-2540 380 0.487 7.993 382.685 0.112 5.363 0.067 3.208 0.000 0.000 7.809 373.897 4412.399 211266.7981 0.499 0.497 0.501

93-97 2362-2464 379 0.517 10.034 480.407 0.143 6.847 0.088 4.213 0.000 0.000 9.801 469.274 4422.2 211736.0725 0.528 0.525 0.531

* 85-93 2159-2362 378 0.403 24.814 1188.088 0.263 12.593 0.168 8.044 6.933 331.941 17.45 835.510 4439.65 212571.583 0.58 0.577 0.583

81-85 2057-2159 377 0.622 7.852 375.971 0.121 5.794 0.081 3.878 0.000 0.000 7.65 366.284 4447.3 212937.867 0.632 0.629 0.63578-81 1981-2057 376 0.474 8.190 392.134 0.086 4.118 0.059 2.825 0.000 0.000 8.045 385.197 4455.345 213323.0636 0.484 0.482 0.48675-78 1905-1981 375 0.451 8.548 409.291 0.082 3.926 0.058 2.777 0.000 0.000 8.407 402.529 4463.752 213725.5929 0.46 0.458 0.46272-75 1829-1905 374 0.391 9.488 454.298 0.078 3.735 0.056 2.681 0.000 0.000 9.352 447.776 4473.104 214173.3691 0.4 0.398 0.402

* 67-72 1702-1829 373 0.395 15.720 752.688 0.120 5.746 0.091 4.357 1.259 60.291 14.25 682.294 4487.354 214855.6628 0.451 0.449 0.453

63-67 1600-1702 372 0.495 10.496 502.538 0.088 4.213 0.070 3.352 0.000 0.000 10.34 495.082 4497.694 215350.7446 0.502 0.499 0.50560-63 1524-1600 371 0.347 10.174 487.121 0.061 2.921 0.051 2.442 0.000 0.000 10.06 481.675 4507.754 215832.42 0.354 0.352 0.35657-60 1448-1524 370 0.351 10.111 484.137 0.057 2.729 0.050 2.394 0.000 0.000 10 478.803 4517.754 216311.2226 0.358 0.356 0.36053-57 1346-1448 369 0.321 14.115 675.852 0.069 3.304 0.064 3.064 0.000 0.000 13.98 669.366 4531.734 216980.5886 0.327 0.325 0.329

* 46-53 1168-1346 368 0.225 28.158 1348.224 0.103 4.932 0.107 5.123 3.538 169.412 24.41 1168.757 4556.144 218149.3456 0.328 0.326 0.330

43-46 1092-1168 367 0.325 10.522 503.781 0.037 1.772 0.044 2.107 0.000 0.000 10.44 499.870 4566.584 218649.2155 0.33 0.328 0.33237-43 940-1092 366 0.213 24.513 1173.666 0.059 2.825 0.083 3.974 0.000 0.000 24.36 1166.363 4590.944 219815.5786 0.218 0.217 0.219

* 25-37 635-940 365 0.070 57.958 2775.023 0.063 3.016 0.119 5.698 3.956 189.393 53.82 2576.915 4644.764 222392.494 0.136 0.135 0.137

13-25 330-635 364 0.054 58.934 2821.771 0.004 0.192 0.000 0.000 0.000 0.000 58.91 2820.626 4703.674 225213.12 0.054 0.051 0.057

* 0-13 0-330 363 0.043 64.621 3094.051 0.004 0.192 0.000 0.000 -1.033 -49.479 65.65 3143.339 4769.324 228356.4588 0.027 0.026 0.028

Results for RBHT Test 1572

Valid Time Period 12482 to 12575 seconds

Collapsed Liquid Level = 90.039 inches = 2286.98 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-27 Data Results for RBHT Test 1572

D for Time Period 12482 to 12575 seconds
A-84

Table A-28 Energy Balance Results for RBHT Test 1572D for Time Period 12482 to 12575 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.4293 5.490309 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

0.25 6.35 1837.1199 5.795326 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

0.50 12.70 1933.8104 6.100343 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

0.75 19.05 2030.5009 6.40536 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

1.00 25.40 2127.1914 6.710377 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

1.25 31.75 2223.8819 7.015394 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

1.50 38.10 2320.5725 7.320411 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

1.75 44.45 2417.263 7.625429 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

2.00 50.80 2513.9535 7.930446 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

2.25 57.15 2610.644 8.235463 0.00E+00 0.00E+00 0.00E+00 8.84E-02 4.01E-02

2.50 63.50 2707.3345 8.54048 2.53E-03 1.81E-01 8.19E-02 8.82E-02 4.00E-02

2.75 69.85 2804.0251 8.845497 5.81E-03 4.14E-01 1.88E-01 8.79E-02 3.99E-02

3.00 76.20 2900.7156 9.150514 9.20E-03 6.56E-01 2.98E-01 8.76E-02 3.97E-02

3.25 82.55 2997.4061 9.455531 1.27E-02 9.06E-01 4.11E-01 8.73E-02 3.96E-02

3.50 88.90 3094.0966 9.760549 1.63E-02 1.16E+00 5.28E-01 8.69E-02 3.94E-02

3.75 95.25 3190.7871 10.06557 2.01E-02 1.43E+00 6.49E-01 8.66E-02 3.93E-02

4.00 101.60 3287.4777 10.37058 2.39E-02 1.71E+00 7.73E-01 8.63E-02 3.91E-02

4.25 107.95 3384.1682 10.6756 2.79E-02 1.99E+00 9.02E-01 8.59E-02 3.90E-02

4.50 114.30 3480.8587 10.98062 3.20E-02 2.28E+00 1.03E+00 8.56E-02 3.88E-02

4.75 120.65 3577.5492 11.28563 3.62E-02 2.58E+00 1.17E+00 8.52E-02 3.86E-02

5.00 127.00 3674.2397 11.59065 4.05E-02 2.89E+00 1.31E+00 8.48E-02 3.85E-02

5.25 133.35 3770.9302 11.89567 4.49E-02 3.20E+00 1.45E+00 8.44E-02 3.83E-02

5.50 139.70 3867.6208 12.20069 4.94E-02 3.53E+00 1.60E+00 8.40E-02 3.81E-02

5.75 146.05 3964.3113 12.5057 5.41E-02 3.86E+00 1.75E+00 8.36E-02 3.79E-02

6.00 152.40 4061.0018 12.81072 5.89E-02 4.20E+00 1.90E+00 8.32E-02 3.77E-02

6.25 158.75 4157.6923 13.11574 6.38E-02 4.55E+00 2.06E+00 8.28E-02 3.75E-02

6.50 165.10 4254.3828 13.42075 6.88E-02 4.90E+00 2.22E+00 8.23E-02 3.73E-02

6.75 171.45 4351.0734 13.72577 7.39E-02 5.27E+00 2.39E+00 8.19E-02 3.71E-02

7.00 177.80 4447.7639 14.03079 7.91E-02 5.64E+00 2.56E+00 8.14E-02 3.69E-02

7.25 184.15 4544.4544 14.33581 8.44E-02 6.02E+00 2.73E+00 8.09E-02 3.67E-02

7.50 190.50 4641.1449 14.64082 8.99E-02 6.41E+00 2.91E+00 8.04E-02 3.65E-02

7.75 196.85 4737.8354 14.94584 9.55E-02 6.81E+00 3.09E+00 8.00E-02 3.63E-02

8.00 203.20 4834.526 15.25086 1.01E-01 7.22E+00 3.27E+00 7.94E-02 3.60E-02

8.25 209.55 4931.2165 15.55587 1.07E-01 7.63E+00 3.46E+00 7.89E-02 3.58E-02

8.50 215.90 5027.907 15.86089 1.13E-01 8.05E+00 3.65E+00 7.84E-02 3.56E-02

8.75 222.25 5124.5975 16.16591 1.19E-01 8.48E+00 3.85E+00 7.79E-02 3.53E-02

9.00 228.60 5221.288 16.47093 1.25E-01 8.92E+00 4.05E+00 7.73E-02 3.51E-02

9.25 234.95 4931.2165 15.55587 1.31E-01 9.35E+00 4.24E+00 7.68E-02 3.48E-02

9.50 241.30 4641.1449 14.64082 1.37E-01 9.76E+00 4.42E+00 7.63E-02 3.46E-02

9.75 247.65 4351.0734 13.72577 1.42E-01 1.01E+01 4.60E+00 7.58E-02 3.44E-02

10.00 254.00 4061.0018 12.81072 1.47E-01 1.05E+01 4.76E+00 7.54E-02 3.42E-02

10.25 260.35 3770.9302 11.89567 1.52E-01 1.08E+01 4.91E+00 7.50E-02 3.40E-02

10.50 266.70 3480.8587 10.98062 1.56E-01 1.11E+01 5.05E+00 7.46E-02 3.38E-02

10.75 273.05 3190.7871 10.06557 1.60E-01 1.14E+01 5.18E+00 7.42E-02 3.37E-02

11.00 279.40 2900.7156 9.150514 1.64E-01 1.17E+01 5.30E+00 7.39E-02 3.35E-02

11.25 285.75 2610.644 8.235463 1.67E-01 1.19E+01 5.40E+00 7.36E-02 3.34E-02

11.50 292.10 2320.5725 7.320411 1.70E-01 1.21E+01 5.50E+00 7.34E-02 3.33E-02

11.75 298.45 2030.5009 6.40536 1.73E-01 1.23E+01 5.58E+00 7.31E-02 3.32E-02

12.00 304.80 1740.4293 5.490309 1.75E-01 1.25E+01 5.65E+00 7.29E-02 3.31E-02

Results for RBHT Test 1572

Valid Time Period 12482 to 12575 seconds
A-85

Figure A-70 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572D for Time Period 12482 to 12575 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-86

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-E 

Test Conditions

Date: 6/5/2003

Steady-state time window: 13358 – 13478 seconds

Inlet flow rate: 1.781 cm/sec (0.701 in./sec) 

Inlet mass flow rate: 0.087 kg/sec (0.192 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-87

Figure A-71 Inlet Flow Plot for Experiment 1572E 

Figure A-72 Inlet Temperature Plot for Experiment 1572E 
A-88

Figure A-73 System Pressure Plot for Experiment 1572E 

Figure A-74 Bundle Power Plot for Experiment 1572E 
A-89

Table A-29: Data Results for RBHT Test 1572 for Time Period 13358 to 13478 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.663 19.252 921.775 0.394 18.865 0.081 3.878 0.000 0.000 18.77 898.712 4338.77 207741.4227 0.671 0.668 0.674

* 120-133 3048-3378 383 0.685 21.246 1017.260 0.438 20.972 0.144 6.895 -1.656 -79.294 22.32 1068.687 4361.09 208810.11 0.669 0.666 0.672

* 108-120 2743-3048 382 0.582 26.024 1246.025 0.368 17.620 0.179 8.571 4.637 222.010 20.84 997.825 4381.93 209807.9346 0.666 0.663 0.669

100-108 2540-2743 381 0.655 14.334 686.296 0.222 10.629 0.131 6.272 0.000 0.000 13.98 669.366 4395.91 210477.3005 0.664 0.661 0.667

97-100 2464-2540 380 0.513 7.587 363.289 0.078 3.735 0.047 2.250 0.000 0.000 7.46 357.187 4403.37 210834.4873 0.521 0.518 0.524

93-97 2362-2464 379 0.536 9.634 461.261 0.099 4.740 0.062 2.969 0.000 0.000 9.47 453.426 4412.84 211287.9133 0.544 0.541 0.547

* 85-93 2159-2362 378 0.416 24.258 1161.481 0.184 8.810 0.119 5.698 7.305 349.767 16.65 797.206 4429.49 212085.1196 0.599 0.596 0.602

81-85 2057-2159 377 0.648 7.317 350.359 0.085 4.070 0.057 2.729 0.000 0.000 7.175 343.541 4436.665 212428.6604 0.655 0.652 0.65878-81 1981-2057 376 0.505 7.707 369.008 0.060 2.873 0.042 2.011 0.000 0.000 7.602 363.986 4444.267 212792.6461 0.512 0.509 0.51575-78 1905-1981 375 0.488 7.982 382.187 0.058 2.777 0.041 1.963 0.000 0.000 7.881 377.344 4452.148 213169.9904 0.494 0.492 0.49672-75 1829-1905 374 0.427 8.933 427.692 0.055 2.633 0.040 1.915 0.000 0.000 8.835 423.022 4460.983 213593.0125 0.433 0.431 0.435

* 67-72 1702-1829 373 0.406 15.429 738.763 0.086 4.118 0.064 3.064 2.169 103.871 13.11 627.710 4474.093 214220.7227 0.495 0.493 0.497

63-67 1600-1702 372 0.552 9.312 445.844 0.063 3.016 0.049 2.346 0.000 0.000 9.195 440.259 4483.288 214660.9816 0.557 0.554 0.56060-63 1524-1600 371 0.376 9.717 465.239 0.044 2.107 0.036 1.724 0.000 0.000 9.632 461.183 4492.92 215122.1643 0.382 0.380 0.38457-60 1448-1524 370 0.381 9.639 461.509 0.042 2.011 0.035 1.676 0.000 0.000 9.557 457.592 4502.477 215579.7559 0.386 0.384 0.38853-57 1346-1448 369 0.358 13.347 639.051 0.052 2.490 0.045 2.155 0.000 0.000 13.24 633.935 4515.717 216213.6905 0.362 0.360 0.364

* 46-53 1168-1346 368 0.255 27.094 1297.249 0.079 3.783 0.075 3.591 5.120 245.128 21.82 1044.747 4537.537 217258.4377 0.4 0.398 0.402

43-46 1092-1168 367 0.433 8.829 422.719 0.029 1.389 0.031 1.484 0.000 0.000 8.766 419.718 4546.303 217678.156 0.437 0.435 0.43937-43 940-1092 366 0.299 21.843 1045.855 0.050 2.394 0.059 2.825 0.000 0.000 21.73 1040.438 4568.033 218718.594 0.302 0.300 0.304

* 25-37 635-940 365 0.144 53.356 2554.712 0.065 3.112 0.106 5.075 2.165 103.674 51.02 2442.851 4619.053 221161.4447 0.181 0.180 0.182

13-25 330-635 364 0.059 58.648 2808.095 0.023 1.101 0.033 1.580 0.000 0.000 58.57 2804.347 4677.623 223965.7914 0.06 0.057 0.063

* 0-13 0-330 363 0.044 64.569 3091.565 0.002 0.096 0.000 0.000 -0.903 -43.252 65.47 3134.720 4743.093 227100.5118 0.03 0.029 0.032

Results for RBHT Test 1572

Valid Time Period 13358 to 13478 seconds

Collapsed Liquid Level = 85.112 inches = 2161.83 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-29 Data Results for RBHT Test 1572

E for Time Period 13358 to 13478 seconds
A-90

Table A-30 Energy Balance Results for RBHT Test 1572E for Time Period 13358 to 13478 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1738.4259 5.483989 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

0.25 6.35 1835.0051 5.788655 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

0.50 12.70 1931.5843 6.093321 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

0.75 19.05 2028.1635 6.397987 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

1.00 25.40 2124.7428 6.702653 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

1.25 31.75 2221.322 7.007319 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

1.50 38.10 2317.9012 7.311985 0.00E+00 0.00E+00 0.00E+00 6.23E-02 2.83E-02

1.75 44.45 2414.4804 7.616651 1.86E-04 9.34E-03 4.24E-03 6.23E-02 2.83E-02

2.00 50.80 2511.0596 7.921317 4.34E-03 2.18E-01 9.91E-02 6.21E-02 2.81E-02

2.25 57.15 2607.6388 8.225983 8.65E-03 4.36E-01 1.98E-01 6.18E-02 2.80E-02

2.50 63.50 2704.2181 8.530649 1.31E-02 6.61E-01 3.00E-01 6.15E-02 2.79E-02

2.75 69.85 2800.7973 8.835315 1.78E-02 8.95E-01 4.06E-01 6.12E-02 2.78E-02

3.00 76.20 2897.3765 9.139981 2.26E-02 1.14E+00 5.16E-01 6.09E-02 2.76E-02

3.25 82.55 2993.9557 9.444647 2.75E-02 1.39E+00 6.29E-01 6.06E-02 2.75E-02

3.50 88.90 3090.5349 9.749313 3.27E-02 1.64E+00 7.46E-01 6.03E-02 2.73E-02

3.75 95.25 3187.1141 10.05398 3.80E-02 1.91E+00 8.67E-01 6.00E-02 2.72E-02

4.00 101.60 3283.6934 10.35865 4.34E-02 2.19E+00 9.92E-01 5.96E-02 2.70E-02

4.25 107.95 3380.2726 10.66331 4.90E-02 2.47E+00 1.12E+00 5.93E-02 2.69E-02

4.50 114.30 3476.8518 10.96798 5.48E-02 2.76E+00 1.25E+00 5.89E-02 2.67E-02

4.75 120.65 3573.431 11.27264 6.08E-02 3.06E+00 1.39E+00 5.85E-02 2.66E-02

5.00 127.00 3670.0102 11.57731 6.69E-02 3.37E+00 1.53E+00 5.82E-02 2.64E-02

5.25 133.35 3766.5894 11.88198 7.31E-02 3.68E+00 1.67E+00 5.78E-02 2.62E-02

5.50 139.70 3863.1687 12.18664 7.96E-02 4.01E+00 1.82E+00 5.74E-02 2.60E-02

5.75 146.05 3959.7479 12.49131 8.62E-02 4.34E+00 1.97E+00 5.70E-02 2.58E-02

6.00 152.40 4056.3271 12.79597 9.29E-02 4.68E+00 2.12E+00 5.65E-02 2.56E-02

6.25 158.75 4152.9063 13.10064 9.98E-02 5.03E+00 2.28E+00 5.61E-02 2.54E-02

6.50 165.10 4249.4855 13.40531 1.07E-01 5.38E+00 2.44E+00 5.57E-02 2.52E-02

6.75 171.45 4346.0647 13.70997 1.14E-01 5.75E+00 2.61E+00 5.52E-02 2.50E-02

7.00 177.80 4442.644 14.01464 1.22E-01 6.12E+00 2.78E+00 5.47E-02 2.48E-02

7.25 184.15 4539.2232 14.3193 1.29E-01 6.50E+00 2.95E+00 5.43E-02 2.46E-02

7.50 190.50 4635.8024 14.62397 1.37E-01 6.89E+00 3.13E+00 5.38E-02 2.44E-02

7.75 196.85 4732.3816 14.92864 1.45E-01 7.29E+00 3.31E+00 5.33E-02 2.42E-02

8.00 203.20 4828.9608 15.2333 1.53E-01 7.69E+00 3.49E+00 5.28E-02 2.39E-02

8.25 209.55 4925.54 15.53797 1.61E-01 8.11E+00 3.68E+00 5.23E-02 2.37E-02

8.50 215.90 5022.1193 15.84263 1.70E-01 8.53E+00 3.87E+00 5.18E-02 2.35E-02

8.75 222.25 5118.6985 16.1473 1.78E-01 8.96E+00 4.06E+00 5.12E-02 2.32E-02

9.00 228.60 5215.2777 16.45197 1.87E-01 9.40E+00 4.26E+00 5.07E-02 2.30E-02

9.25 234.95 4925.54 15.53797 1.95E-01 9.83E+00 4.46E+00 5.02E-02 2.27E-02

9.50 241.30 4635.8024 14.62397 2.03E-01 1.02E+01 4.64E+00 4.97E-02 2.25E-02

9.75 247.65 4346.0647 13.70997 2.11E-01 1.06E+01 4.82E+00 4.92E-02 2.23E-02

10.00 254.00 4056.3271 12.79597 2.18E-01 1.10E+01 4.98E+00 4.87E-02 2.21E-02

10.25 260.35 3766.5894 11.88198 2.25E-01 1.13E+01 5.13E+00 4.83E-02 2.19E-02

10.50 266.70 3476.8518 10.96798 2.31E-01 1.16E+01 5.27E+00 4.79E-02 2.17E-02

10.75 273.05 3187.1141 10.05398 2.36E-01 1.19E+01 5.40E+00 4.76E-02 2.16E-02

11.00 279.40 2897.3765 9.139981 2.41E-01 1.22E+01 5.51E+00 4.73E-02 2.14E-02

11.25 285.75 2607.6388 8.225983 2.46E-01 1.24E+01 5.62E+00 4.70E-02 2.13E-02

11.50 292.10 2317.9012 7.311985 2.50E-01 1.26E+01 5.71E+00 4.67E-02 2.12E-02

11.75 298.45 2028.1635 6.397987 2.54E-01 1.28E+01 5.80E+00 4.65E-02 2.11E-02

12.00 304.80 1738.4259 5.483989 2.57E-01 1.29E+01 5.87E+00 4.63E-02 2.10E-02

Results for RBHT Test 1572

Valid Time Period 13358 to 13478 seconds
A-91

Figure A-75 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572E for Time Period 13358 to 13478 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-92

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-F 

Test Conditions

Date: 6/5/2003

Steady-state time window: 13845 – 14001 seconds

Inlet flow rate: 1.275 cm/sec (0.502 in./sec) 

Inlet mass flow rate: 0.063 kg/sec (0.138 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-93

Figure A-76 Inlet Flow Plot for Experiment 1572F 

Figure A-77 Inlet Temperature Plot for Experiment 1572F 
A-94

Figure A-78 System Pressure Plot for Experiment 1572F 

Figure A-79 Bundle Power Plot for Experiment 1572F 
A-95

Table A-31: Data Results for RBHT Test 1572 for Time Period 13845 to 14001 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.695 17.396 832.930 0.297 14.196 0.061 2.935 0.000 0.000 17.03 815.401 4337.03 207658.111 0.702 0.698 0.705

* 120-133 3048-3378 383 0.705 19.904 953.007 0.330 15.781 0.109 5.238 -1.005 -48.122 20.47 980.109 4357.5 208638.2199 0.697 0.693 0.700

* 108-120 2743-3048 382 0.600 24.949 1194.578 0.276 13.229 0.137 6.540 5.006 239.707 19.53 935.101 4377.03 209573.3213 0.686 0.683 0.690

100-108 2540-2743 381 0.675 13.505 646.635 0.166 7.953 0.100 4.784 0.000 0.000 13.23 633.456 4390.26 210206.7771 0.681 0.678 0.685

97-100 2464-2540 380 0.531 7.313 350.135 0.058 2.794 0.036 1.731 0.000 0.000 7.216 345.504 4397.476 210552.281 0.537 0.534 0.539

93-97 2362-2464 379 0.561 9.127 437.016 0.075 3.569 0.047 2.256 0.000 0.000 9.003 431.066 4406.479 210983.347 0.567 0.564 0.569

* 85-93 2159-2362 378 0.424 23.919 1145.269 0.138 6.617 0.090 4.329 7.901 378.293 15.79 756.029 4422.269 211739.3762 0.620 0.617 0.623

81-85 2057-2159 377 0.668 6.892 329.994 0.064 3.049 0.043 2.074 0.000 0.000 6.783 324.772 4429.052 212064.148 0.673 0.670 0.677

78-81 1981-2057 376 0.523 7.434 355.954 0.045 2.176 0.032 1.516 0.000 0.000 7.355 352.159 4436.407 212416.3073 0.528 0.525 0.530

75-78 1905-1981 375 0.507 7.689 368.138 0.043 2.082 0.031 1.481 0.000 0.000 7.612 364.465 4444.019 212780.7718 0.511 0.509 0.514

72-75 1829-1905 374 0.453 8.523 408.097 0.042 1.989 0.030 1.447 0.000 0.000 8.449 404.540 4452.468 213185.3121 0.458 0.455 0.460

* 67-72 1702-1829 373 0.411 15.305 732.795 0.065 3.111 0.049 2.337 2.791 133.632 12.4 593.715 4464.868 213779.0273 0.522 0.519 0.525

63-67 1600-1702 372 0.583 8.670 415.134 0.048 2.305 0.038 1.801 0.000 0.000 8.582 410.908 4473.45 214189.9357 0.587 0.584 0.590

60-63 1524-1600 371 0.396 9.413 450.693 0.034 1.623 0.027 1.311 0.000 0.000 9.349 447.633 4482.799 214637.5682 0.400 0.398 0.402

57-60 1448-1524 370 0.394 9.440 452.010 0.032 1.532 0.027 1.277 0.000 0.000 9.379 449.069 4492.178 215086.6371 0.398 0.396 0.400

53-57 1346-1448 369 0.372 13.043 624.505 0.040 1.903 0.034 1.650 0.000 0.000 12.96 620.528 4505.138 215707.1653 0.376 0.374 0.378

* 46-53 1168-1346 368 0.273 26.443 1266.117 0.062 2.946 0.057 2.742 5.665 271.223 20.66 989.206 4525.798 216696.3714 0.432 0.429 0.434

43-46 1092-1168 367 0.484 8.032 384.574 0.023 1.109 0.023 1.118 0.000 0.000 7.983 382.228 4533.781 217078.5995 0.488 0.485 0.490

37-43 940-1092 366 0.335 20.716 991.872 0.041 1.943 0.045 2.135 0.000 0.000 20.62 987.291 4554.401 218065.8904 0.338 0.336 0.340

* 25-37 635-940 365 0.193 50.268 2406.860 0.057 2.748 0.081 3.860 1.320 63.217 48.81 2337.035 4603.211 220402.9257 0.217 0.215 0.218

13-25 330-635 364 0.094 56.463 2703.459 0.025 1.192 0.049 2.333 0.000 0.000 56.37 2699.010 4659.581 223101.9358 0.095 0.090 0.100

* 0-13 0-330 363 0.045 64.485 3087.536 0.001 0.061 0.000 0.000 0.203 9.732 64.28 3077.743 4723.861 226179.6787 0.048 0.045 0.050

Results for RBHT Test 1572

Valid Time Period 13845 to 14001 seconds

Collapsed Liquid Level = 82.330 inches = 2091.17 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-31 Data Results for RBHT Test 1572

F for Time Period 13845 to 14001 seconds
A-96

Table A-32 Energy Balance Results for RBHT Test 1572F for Time Period 13845 to 14001 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1738.9613 5.485677 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

0.25 6.35 1835.5702 5.790437 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

0.50 12.70 1932.1792 6.095197 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

0.75 19.05 2028.7882 6.399957 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

1.00 25.40 2125.3971 6.704717 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

1.25 31.75 2222.0061 7.009477 0.00E+00 0.00E+00 0.00E+00 4.75E-02 2.15E-02

1.50 38.10 2318.615 7.314237 2.09E-03 8.02E-02 3.64E-02 4.74E-02 2.15E-02

1.75 44.45 2415.224 7.618996 7.33E-03 2.81E-01 1.27E-01 4.71E-02 2.14E-02

2.00 50.80 2511.833 7.923756 1.28E-02 4.90E-01 2.22E-01 4.68E-02 2.13E-02

2.25 57.15 2608.4419 8.228516 1.85E-02 7.07E-01 3.21E-01 4.66E-02 2.11E-02

2.50 63.50 2705.0509 8.533276 2.43E-02 9.33E-01 4.23E-01 4.63E-02 2.10E-02

2.75 69.85 2801.6598 8.838036 3.04E-02 1.17E+00 5.29E-01 4.60E-02 2.09E-02

3.00 76.20 2898.2688 9.142796 3.68E-02 1.41E+00 6.39E-01 4.57E-02 2.07E-02

3.25 82.55 2994.8778 9.447556 4.33E-02 1.66E+00 7.52E-01 4.54E-02 2.06E-02

3.50 88.90 3091.4867 9.752316 5.00E-02 1.92E+00 8.69E-01 4.51E-02 2.04E-02

3.75 95.25 3188.0957 10.05708 5.70E-02 2.18E+00 9.90E-01 4.48E-02 2.03E-02

4.00 101.60 3284.7046 10.36184 6.41E-02 2.46E+00 1.11E+00 4.44E-02 2.01E-02

4.25 107.95 3381.3136 10.6666 7.15E-02 2.74E+00 1.24E+00 4.41E-02 2.00E-02

4.50 114.30 3477.9226 10.97135 7.91E-02 3.03E+00 1.38E+00 4.37E-02 1.98E-02

4.75 120.65 3574.5315 11.27611 8.69E-02 3.33E+00 1.51E+00 4.33E-02 1.97E-02

5.00 127.00 3671.1405 11.58087 9.49E-02 3.64E+00 1.65E+00 4.30E-02 1.95E-02

5.25 133.35 3767.7494 11.88563 1.03E-01 3.96E+00 1.79E+00 4.26E-02 1.93E-02

5.50 139.70 3864.3584 12.19039 1.12E-01 4.28E+00 1.94E+00 4.22E-02 1.91E-02

5.75 146.05 3960.9674 12.49515 1.20E-01 4.61E+00 2.09E+00 4.17E-02 1.89E-02

6.00 152.40 4057.5763 12.79991 1.29E-01 4.95E+00 2.25E+00 4.13E-02 1.87E-02

6.25 158.75 4154.1853 13.10467 1.38E-01 5.30E+00 2.40E+00 4.09E-02 1.85E-02

6.50 165.10 4250.7942 13.40943 1.48E-01 5.66E+00 2.57E+00 4.05E-02 1.83E-02

6.75 171.45 4347.4032 13.71419 1.57E-01 6.02E+00 2.73E+00 4.00E-02 1.81E-02

7.00 177.80 4444.0122 14.01895 1.67E-01 6.39E+00 2.90E+00 3.95E-02 1.79E-02

7.25 184.15 4540.6211 14.32371 1.77E-01 6.78E+00 3.07E+00 3.91E-02 1.77E-02

7.50 190.50 4637.2301 14.62847 1.87E-01 7.16E+00 3.25E+00 3.86E-02 1.75E-02

7.75 196.85 4733.839 14.93323 1.97E-01 7.56E+00 3.43E+00 3.81E-02 1.73E-02

8.00 203.20 4830.448 15.23799 2.08E-01 7.97E+00 3.61E+00 3.76E-02 1.71E-02

8.25 209.55 4927.057 15.54275 2.19E-01 8.38E+00 3.80E+00 3.71E-02 1.68E-02

8.50 215.90 5023.6659 15.84751 2.30E-01 8.80E+00 3.99E+00 3.66E-02 1.66E-02

8.75 222.25 5120.2749 16.15227 2.41E-01 9.23E+00 4.19E+00 3.60E-02 1.63E-02

9.00 228.60 5216.8838 16.45703 2.52E-01 9.67E+00 4.39E+00 3.55E-02 1.61E-02

9.25 234.95 4927.057 15.54275 2.64E-01 1.01E+01 4.58E+00 3.49E-02 1.59E-02

9.50 241.30 4637.2301 14.62847 2.74E-01 1.05E+01 4.77E+00 3.44E-02 1.56E-02

9.75 247.65 4347.4032 13.71419 2.84E-01 1.09E+01 4.94E+00 3.40E-02 1.54E-02

10.00 254.00 4057.5763 12.79991 2.94E-01 1.12E+01 5.10E+00 3.35E-02 1.52E-02

10.25 260.35 3767.7494 11.88563 3.02E-01 1.16E+01 5.25E+00 3.31E-02 1.50E-02

10.50 266.70 3477.9226 10.97135 3.10E-01 1.19E+01 5.39E+00 3.27E-02 1.49E-02

10.75 273.05 3188.0957 10.05708 3.18E-01 1.22E+01 5.52E+00 3.24E-02 1.47E-02

11.00 279.40 2898.2688 9.142796 3.24E-01 1.24E+01 5.64E+00 3.21E-02 1.45E-02

11.25 285.75 2608.4419 8.228516 3.30E-01 1.27E+01 5.74E+00 3.18E-02 1.44E-02

11.50 292.10 2318.615 7.314237 3.36E-01 1.29E+01 5.84E+00 3.15E-02 1.43E-02

11.75 298.45 2028.7882 6.399957 3.41E-01 1.31E+01 5.92E+00 3.13E-02 1.42E-02

12.00 304.80 1738.9613 5.485677 3.45E-01 1.32E+01 5.99E+00 3.11E-02 1.41E-02

Results for RBHT Test 1572

Valid Time Period 13845 to 14001 seconds
A-97

Figure A-80 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572F for Time Period 13845 to 14001 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-98

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-G 

Test Conditions

Date: 6/5/2003

Steady-state time window: 14172 – 14259 seconds

Inlet flow rate: 0.772 cm/sec (0.304 in./sec) 

Inlet mass flow rate: 0.038 kg/sec (0.083 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-99

Figure A-81 Inlet Flow Plot for Experiment 1572G 

Figure A-82 Inlet Temperature Plot for Experiment 1572G 
A-100

Figure A-83 System Pressure Plot for Experiment 1572G 

Figure A-84 Bundle Power Plot for Experiment 1572G 
A-101

Table A-33: Data Results for RBHT Test 1572 for Time Period 14172 to 14259 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.778 12.708 608.466 0.167 7.996 0.035 1.676 0.000 0.000 12.5 598.503 4332.5 207441.2135 0.781 0.777 0.785

* 120-133 3048-3378 383 0.762 16.053 768.602 0.185 8.858 0.062 2.969 -0.124 -5.957 15.93 762.732 4348.43 208203.9459 0.764 0.760 0.768

* 108-120 2743-3048 382 0.650 21.786 1043.120 0.154 7.374 0.078 3.735 4.704 225.230 16.85 806.782 4365.28 209010.7283 0.73 0.726 0.734

100-108 2540-2743 381 0.709 12.095 579.124 0.092 4.405 0.057 2.729 0.000 0.000 11.94 571.690 4377.22 209582.4185 0.712 0.708 0.716

97-100 2464-2540 380 0.572 6.673 319.525 0.032 1.532 0.021 1.005 0.000 0.000 6.618 316.872 4383.838 209899.2901 0.575 0.572 0.578

93-97 2362-2464 379 0.586 8.595 411.529 0.041 1.963 0.027 1.293 0.000 0.000 8.525 408.179 4392.363 210307.4693 0.59 0.587 0.593

* 85-93 2159-2362 378 0.441 23.235 1112.496 0.076 3.639 0.052 2.490 8.087 387.206 15.02 719.161 4407.383 211026.6307 0.639 0.636 0.642

81-85 2057-2159 377 0.685 6.554 313.806 0.035 1.676 0.025 1.197 0.000 0.000 6.49 310.743 4413.873 211337.3736 0.688 0.685 0.691

78-81 1981-2057 376 0.545 7.084 339.169 0.025 1.197 0.018 0.862 0.000 0.000 7.038 336.981 4420.911 211674.3549 0.548 0.545 0.551

75-78 1905-1981 375 0.536 7.229 346.132 0.024 1.149 0.018 0.862 0.000 0.000 7.185 344.020 4428.096 212018.3745 0.539 0.536 0.542

72-75 1829-1905 374 0.491 7.935 379.949 0.023 1.101 0.017 0.814 0.000 0.000 7.893 377.919 4435.989 212396.2934 0.493 0.491 0.495

* 67-72 1702-1829 373 0.414 15.227 729.065 0.036 1.724 0.028 1.341 3.633 173.941 11.53 552.059 4447.519 212948.3527 0.556 0.553 0.559

63-67 1600-1702 372 0.616 7.977 381.939 0.027 1.293 0.021 1.005 0.000 0.000 7.926 379.499 4455.445 213327.8516 0.618 0.615 0.621

60-63 1524-1600 371 0.416 9.094 435.400 0.019 0.910 0.016 0.766 0.000 0.000 9.055 433.556 4464.5 213761.4074 0.419 0.417 0.421

57-60 1448-1524 370 0.420 9.042 432.914 0.018 0.862 0.015 0.718 0.000 0.000 9.003 431.066 4473.503 214192.4733 0.422 0.420 0.424

53-57 1346-1448 369 0.400 12.469 597.028 0.022 1.053 0.020 0.958 0.000 0.000 12.42 594.673 4485.923 214787.1461 0.402 0.400 0.404

* 46-53 1168-1346 368 0.278 26.247 1256.717 0.035 1.676 0.033 1.580 6.619 316.924 19.56 936.538 4505.483 215723.6839 0.462 0.460 0.464

43-46 1092-1168 367 0.520 7.473 357.819 0.013 0.622 0.013 0.622 0.000 0.000 7.444 356.421 4512.927 216080.1046 0.522 0.519 0.525

37-43 940-1092 366 0.385 19.179 918.294 0.024 1.149 0.025 1.197 0.000 0.000 19.12 915.471 4532.047 216995.5751 0.386 0.384 0.388

* 25-37 635-940 365 0.230 47.986 2297.600 0.036 1.724 0.046 2.202 3.614 173.057 44.29 2120.617 4576.337 219116.1917 0.289 0.288 0.290

13-25 330-635 364 0.191 50.412 2413.723 0.020 0.958 0.039 1.867 0.000 0.000 50.34 2410.292 4626.677 221526.4838 0.192 0.191 0.193

* 0-13 0-330 363 0.048 64.304 3078.883 0.006 0.287 0.008 0.383 3.280 157.038 61.01 2921.174 4687.687 224447.6583 0.096 0.091 0.101

Results for RBHT Test 1572

Valid Time Period 14172 to 14259 seconds

Collapsed Liquid Level = 78.420 inches = 1991.87 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-33 Data Results for RBHT Test 1572

G for Time Period 14172 to 14259 seconds
A-102

Table A-34 Energy Balance Results for RBHT Test 1572G for Time Period 14172 to 14259 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.5582 5.490715 0.00E+00 0.00E+00 0.00E+00 2.70E-02 1.22E-02

0.25 6.35 1837.2559 5.795755 0.00E+00 0.00E+00 0.00E+00 2.70E-02 1.22E-02

0.50 12.70 1933.9535 6.100794 0.00E+00 0.00E+00 0.00E+00 2.70E-02 1.22E-02

0.75 19.05 2030.6512 6.405834 0.00E+00 0.00E+00 0.00E+00 2.70E-02 1.22E-02

1.00 25.40 2127.3489 6.710874 4.81E-03 1.05E-01 4.76E-02 2.69E-02 1.22E-02

1.25 31.75 2224.0466 7.015914 1.33E-02 2.90E-01 1.31E-01 2.66E-02 1.21E-02

1.50 38.10 2320.7443 7.320953 2.21E-02 4.83E-01 2.19E-01 2.64E-02 1.20E-02

1.75 44.45 2417.4419 7.625993 3.13E-02 6.84E-01 3.10E-01 2.62E-02 1.19E-02

2.00 50.80 2514.1396 7.931033 4.09E-02 8.93E-01 4.05E-01 2.59E-02 1.17E-02

2.25 57.15 2610.8373 8.236073 5.09E-02 1.11E+00 5.04E-01 2.56E-02 1.16E-02

2.50 63.50 2707.535 8.541112 6.12E-02 1.34E+00 6.06E-01 2.54E-02 1.15E-02

2.75 69.85 2804.2326 8.846152 7.20E-02 1.57E+00 7.12E-01 2.51E-02 1.14E-02

3.00 76.20 2900.9303 9.151192 8.31E-02 1.81E+00 8.22E-01 2.48E-02 1.12E-02

3.25 82.55 2997.628 9.456231 9.45E-02 2.06E+00 9.36E-01 2.45E-02 1.11E-02

3.50 88.90 3094.3257 9.761271 1.06E-01 2.32E+00 1.05E+00 2.41E-02 1.09E-02

3.75 95.25 3191.0233 10.06631 1.19E-01 2.59E+00 1.17E+00 2.38E-02 1.08E-02

4.00 101.60 3287.721 10.37135 1.31E-01 2.86E+00 1.30E+00 2.35E-02 1.06E-02

4.25 107.95 3384.4187 10.67639 1.44E-01 3.15E+00 1.43E+00 2.31E-02 1.05E-02

4.50 114.30 3481.1164 10.98143 1.58E-01 3.44E+00 1.56E+00 2.27E-02 1.03E-02

4.75 120.65 3577.8141 11.28647 1.71E-01 3.74E+00 1.70E+00 2.24E-02 1.02E-02

5.00 127.00 3674.5117 11.59151 1.85E-01 4.05E+00 1.84E+00 2.20E-02 9.98E-03

5.25 133.35 3771.2094 11.89655 2.00E-01 4.36E+00 1.98E+00 2.16E-02 9.80E-03

5.50 139.70 3867.9071 12.20159 2.15E-01 4.69E+00 2.13E+00 2.12E-02 9.62E-03

5.75 146.05 3964.6048 12.50663 2.30E-01 5.02E+00 2.28E+00 2.08E-02 9.43E-03

6.00 152.40 4061.3024 12.81167 2.46E-01 5.36E+00 2.43E+00 2.04E-02 9.24E-03

6.25 158.75 4158.0001 13.11671 2.62E-01 5.71E+00 2.59E+00 1.99E-02 9.05E-03

6.50 165.10 4254.6978 13.42175 2.78E-01 6.07E+00 2.75E+00 1.95E-02 8.84E-03

6.75 171.45 4351.3955 13.72679 2.95E-01 6.43E+00 2.92E+00 1.90E-02 8.64E-03

7.00 177.80 4448.0931 14.03183 3.12E-01 6.80E+00 3.09E+00 1.86E-02 8.43E-03

7.25 184.15 4544.7908 14.33687 3.29E-01 7.19E+00 3.26E+00 1.81E-02 8.22E-03

7.50 190.50 4641.4885 14.64191 3.47E-01 7.58E+00 3.44E+00 1.76E-02 8.00E-03

7.75 196.85 4738.1862 14.94695 3.65E-01 7.97E+00 3.62E+00 1.71E-02 7.77E-03

8.00 203.20 4834.8839 15.25199 3.84E-01 8.38E+00 3.80E+00 1.66E-02 7.54E-03

8.25 209.55 4931.5815 15.55703 4.03E-01 8.80E+00 3.99E+00 1.61E-02 7.31E-03

8.50 215.90 5028.2792 15.86207 4.22E-01 9.22E+00 4.18E+00 1.56E-02 7.08E-03

8.75 222.25 5124.9769 16.16711 4.42E-01 9.65E+00 4.38E+00 1.51E-02 6.83E-03

9.00 228.60 5221.6746 16.47215 4.62E-01 1.01E+01 4.58E+00 1.45E-02 6.59E-03

9.25 234.95 4931.5815 15.55703 4.82E-01 1.05E+01 4.77E+00 1.40E-02 6.34E-03

9.50 241.30 4641.4885 14.64191 5.01E-01 1.09E+01 4.96E+00 1.35E-02 6.12E-03

9.75 247.65 4351.3955 13.72679 5.18E-01 1.13E+01 5.13E+00 1.30E-02 5.90E-03

10.00 254.00 4061.3024 12.81167 5.35E-01 1.17E+01 5.29E+00 1.26E-02 5.70E-03

10.25 260.35 3771.2094 11.89655 5.50E-01 1.20E+01 5.44E+00 1.22E-02 5.51E-03

10.50 266.70 3481.1164 10.98143 5.64E-01 1.23E+01 5.58E+00 1.18E-02 5.34E-03

10.75 273.05 3191.0233 10.06631 5.77E-01 1.26E+01 5.71E+00 1.14E-02 5.18E-03

11.00 279.40 2900.9303 9.151192 5.89E-01 1.28E+01 5.83E+00 1.11E-02 5.04E-03

11.25 285.75 2610.8373 8.236073 6.00E-01 1.31E+01 5.93E+00 1.08E-02 4.91E-03

11.50 292.10 2320.7443 7.320953 6.09E-01 1.33E+01 6.03E+00 1.06E-02 4.79E-03

11.75 298.45 2030.6512 6.405834 6.18E-01 1.35E+01 6.11E+00 1.03E-02 4.69E-03

12.00 304.80 1740.5582 5.490715 6.25E-01 1.36E+01 6.19E+00 1.01E-02 4.59E-03

Results for RBHT Test 1572

Valid Time Period 14172 to 14259 seconds
A-103

Figure A-85 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572G for Time Period 14172 to 14259 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-104

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-H 

Test Conditions

Date: 6/5/2003

Steady-state time window: 14376 – 14469 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.025 kg/sec (0.055 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-105

Figure A-86 Inlet Flow Plot for Experiment 1572H 

Figure A-87 Inlet Temperature Plot for Experiment 1572H 
A-106

Figure A-88 System Pressure Plot for Experiment 1572H 

Figure A-89 Bundle Power Plot for Experiment 1572H 
A-107

Table A-35: Data Results for RBHT Test 1572 for Time Period 14376 to 14469 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.818 10.407 498.311 0.100 4.788 0.023 1.101 0.000 0.000 10.28 492.209 4330.28 207334.9193 0.82 0.816 0.824

* 120-133 3048-3378 383 0.778 14.972 716.881 0.116 5.554 0.041 1.963 0.895 42.871 13.92 666.493 4344.2 208001.4125 0.794 0.790 0.798

* 108-120 2743-3048 382 0.655 21.495 1029.195 0.099 4.740 0.051 2.442 5.215 249.705 16.13 772.309 4360.33 208773.721 0.741 0.737 0.745

100-108 2540-2743 381 0.713 11.945 571.913 0.060 2.873 0.037 1.772 0.000 0.000 11.84 566.902 4372.17 209340.6232 0.715 0.711 0.719

97-100 2464-2540 380 0.586 6.455 309.082 0.021 1.005 0.014 0.670 0.000 0.000 6.419 307.343 4378.589 209647.9666 0.588 0.585 0.591

93-97 2362-2464 379 0.588 8.569 410.286 0.027 1.293 0.018 0.862 0.000 0.000 8.52 407.940 4387.109 210055.9064 0.59 0.587 0.593

* 85-93 2159-2362 378 0.442 23.193 1110.507 0.049 2.346 0.034 1.628 8.250 395.032 14.86 711.501 4401.969 210767.407 0.642 0.639 0.645

81-85 2057-2159 377 0.693 6.388 305.849 0.023 1.101 0.016 0.766 0.000 0.000 6.345 303.800 4408.314 211071.2073 0.695 0.692 0.698

78-81 1981-2057 376 0.548 7.037 336.932 0.016 0.766 0.012 0.575 0.000 0.000 7.005 335.401 4415.319 211406.6085 0.55 0.547 0.553

75-78 1905-1981 375 0.543 7.120 340.910 0.015 0.718 0.012 0.575 0.000 0.000 7.089 339.423 4422.408 211746.0316 0.545 0.542 0.548

72-75 1829-1905 374 0.496 7.858 376.220 0.015 0.718 0.011 0.527 0.000 0.000 7.828 374.807 4430.236 212120.8383 0.497 0.495 0.499

* 67-72 1702-1829 373 0.412 15.258 730.557 0.023 1.101 0.018 0.862 3.827 183.238 11.39 545.356 4441.626 212666.1944 0.561 0.558 0.564

63-67 1600-1702 372 0.624 7.821 374.479 0.017 0.814 0.014 0.670 0.000 0.000 7.786 372.796 4449.412 213038.9901 0.625 0.622 0.628

60-63 1524-1600 371 0.426 8.948 428.438 0.012 0.575 0.010 0.479 0.000 0.000 8.92 427.092 4458.332 213466.082 0.427 0.425 0.429

57-60 1448-1524 370 0.428 8.907 426.448 0.011 0.527 0.010 0.479 0.000 0.000 8.88 425.177 4467.212 213891.2586 0.43 0.428 0.432

53-57 1346-1448 369 0.410 12.256 586.833 0.014 0.670 0.013 0.622 0.000 0.000 12.23 585.576 4479.442 214476.8342 0.411 0.409 0.413

* 46-53 1168-1346 368 0.278 26.247 1256.717 0.022 1.053 0.021 1.005 6.934 332.006 19.27 922.653 4498.712 215399.4867 0.47 0.468 0.472

43-46 1092-1168 367 0.527 7.369 352.846 0.009 0.431 0.009 0.431 0.000 0.000 7.349 351.872 4506.061 215751.3587 0.528 0.525 0.531

37-43 940-1092 366 0.396 18.821 901.137 0.015 0.718 0.017 0.814 0.000 0.000 18.78 899.191 4524.841 216650.55 0.397 0.395 0.399

* 25-37 635-940 365 0.245 47.052 2252.841 0.024 1.149 0.030 1.436 4.228 202.417 42.77 2047.839 4567.611 218698.3886 0.314 0.312 0.316

13-25 330-635 364 0.229 48.028 2299.589 0.014 0.670 0.026 1.245 0.000 0.000 47.97 2296.816 4615.581 220995.2045 0.23 0.229 0.231

* 0-13 0-330 363 0.055 63.800 3054.763 0.006 0.287 0.011 0.527 4.053 194.062 59.73 2859.888 4675.311 223855.0922 0.115 0.114 0.116

 (Z2φ) Two-Phase Level (Dryout) = 142.20 inches = 3611.88 mm

 (S) Level Swell = 2.031

Results for RBHT Test 1572

Valid Time Period 14376 to 14469 seconds

Collapsed Liquid Level = 73.602 inches = 1869.50 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-35 Data Results for RBHT Test 1572

H for Time Period 14376 to 14469 seconds
A-108

Table A-36 Energy Balance Results for RBHT Test 1572H for Time Period 14376 to 14469 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.0015 5.495268 0.00E+00 0.00E+00 0.00E+00 1.78E-02 8.05E-03

0.25 6.35 1838.7793 5.800561 0.00E+00 0.00E+00 0.00E+00 1.78E-02 8.05E-03

0.50 12.70 1935.5572 6.105853 0.00E+00 0.00E+00 0.00E+00 1.78E-02 8.05E-03

0.75 19.05 2032.3351 6.411146 7.65E-03 1.10E-01 4.98E-02 1.76E-02 7.99E-03

1.00 25.40 2129.1129 6.716439 2.00E-02 2.86E-01 1.30E-01 1.74E-02 7.89E-03

1.25 31.75 2225.8908 7.021731 3.29E-02 4.71E-01 2.14E-01 1.72E-02 7.79E-03

1.50 38.10 2322.6686 7.327024 4.63E-02 6.65E-01 3.01E-01 1.69E-02 7.68E-03

1.75 44.45 2419.4465 7.632317 6.03E-02 8.66E-01 3.93E-01 1.67E-02 7.57E-03

2.00 50.80 2516.2244 7.937609 7.49E-02 1.08E+00 4.88E-01 1.64E-02 7.45E-03

2.25 57.15 2613.0022 8.242902 9.01E-02 1.29E+00 5.87E-01 1.62E-02 7.33E-03

2.50 63.50 2709.7801 8.548195 1.06E-01 1.52E+00 6.89E-01 1.59E-02 7.20E-03

2.75 69.85 2806.5579 8.853487 1.22E-01 1.75E+00 7.96E-01 1.56E-02 7.07E-03

3.00 76.20 2903.3358 9.15878 1.39E-01 2.00E+00 9.06E-01 1.53E-02 6.93E-03

3.25 82.55 3000.1136 9.464073 1.57E-01 2.25E+00 1.02E+00 1.50E-02 6.79E-03

3.50 88.90 3096.8915 9.769365 1.75E-01 2.51E+00 1.14E+00 1.47E-02 6.65E-03

3.75 95.25 3193.6694 10.07466 1.93E-01 2.77E+00 1.26E+00 1.43E-02 6.50E-03

4.00 101.60 3290.4472 10.37995 2.12E-01 3.05E+00 1.38E+00 1.40E-02 6.34E-03

4.25 107.95 3387.2251 10.68524 2.32E-01 3.33E+00 1.51E+00 1.36E-02 6.18E-03

4.50 114.30 3484.0029 10.99054 2.53E-01 3.62E+00 1.64E+00 1.33E-02 6.02E-03

4.75 120.65 3580.7808 11.29583 2.73E-01 3.92E+00 1.78E+00 1.29E-02 5.85E-03

5.00 127.00 3677.5587 11.60112 2.95E-01 4.23E+00 1.92E+00 1.25E-02 5.68E-03

5.25 133.35 3774.3365 11.90641 3.17E-01 4.55E+00 2.06E+00 1.21E-02 5.50E-03

5.50 139.70 3871.1144 12.21171 3.40E-01 4.87E+00 2.21E+00 1.17E-02 5.32E-03

5.75 146.05 3967.8922 12.517 3.63E-01 5.21E+00 2.36E+00 1.13E-02 5.13E-03

6.00 152.40 4064.6701 12.82229 3.87E-01 5.55E+00 2.52E+00 1.09E-02 4.94E-03

6.25 158.75 4161.448 13.12758 4.11E-01 5.90E+00 2.68E+00 1.05E-02 4.74E-03

6.50 165.10 4258.2258 13.43288 4.36E-01 6.25E+00 2.84E+00 1.00E-02 4.54E-03

6.75 171.45 4355.0037 13.73817 4.61E-01 6.62E+00 3.00E+00 9.56E-03 4.34E-03

7.00 177.80 4451.7815 14.04346 4.87E-01 6.99E+00 3.17E+00 9.10E-03 4.13E-03

7.25 184.15 4548.5594 14.34876 5.14E-01 7.38E+00 3.35E+00 8.63E-03 3.91E-03

7.50 190.50 4645.3373 14.65405 5.41E-01 7.77E+00 3.52E+00 8.15E-03 3.69E-03

7.75 196.85 4742.1151 14.95934 5.69E-01 8.17E+00 3.70E+00 7.65E-03 3.47E-03

8.00 203.20 4838.893 15.26463 5.97E-01 8.57E+00 3.89E+00 7.15E-03 3.24E-03

8.25 209.55 4935.6708 15.56993 6.26E-01 8.99E+00 4.08E+00 6.64E-03 3.01E-03

8.50 215.90 5032.4487 15.87522 6.56E-01 9.41E+00 4.27E+00 6.11E-03 2.77E-03

8.75 222.25 5129.2266 16.18051 6.86E-01 9.84E+00 4.46E+00 5.58E-03 2.53E-03

9.00 228.60 5226.0044 16.4858 7.16E-01 1.03E+01 4.66E+00 5.04E-03 2.28E-03

9.25 234.95 4935.6708 15.56993 7.47E-01 1.07E+01 4.86E+00 4.50E-03 2.04E-03

9.50 241.30 4645.3373 14.65405 7.75E-01 1.11E+01 5.04E+00 4.00E-03 1.81E-03

9.75 247.65 4355.0037 13.73817 8.02E-01 1.15E+01 5.22E+00 3.52E-03 1.60E-03

10.00 254.00 4064.6701 12.82229 8.26E-01 1.19E+01 5.38E+00 3.08E-03 1.40E-03

10.25 260.35 3774.3365 11.90641 8.50E-01 1.22E+01 5.53E+00 2.67E-03 1.21E-03

10.50 266.70 3484.0029 10.99054 8.71E-01 1.25E+01 5.67E+00 2.29E-03 1.04E-03

10.75 273.05 3193.6694 10.07466 8.91E-01 1.28E+01 5.80E+00 1.94E-03 8.79E-04

11.00 279.40 2903.3358 9.15878 9.09E-01 1.30E+01 5.92E+00 1.62E-03 7.34E-04

11.25 285.75 2613.0022 8.242902 9.25E-01 1.33E+01 6.02E+00 1.33E-03 6.02E-04

11.50 292.10 2322.6686 7.327024 9.40E-01 1.35E+01 6.12E+00 1.07E-03 4.85E-04

11.75 298.45 2032.3351 6.411146 9.53E-01 1.37E+01 6.20E+00 8.40E-04 3.81E-04

12.00 304.80 1742.0015 5.495268 9.64E-01 1.38E+01 6.27E+00 6.43E-04 2.92E-04

Results for RBHT Test 1572

Valid Time Period 14376 to 14469 seconds
A-109

Figure A-90 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572H for Time Period 14376 to 14469 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-110

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-I 

Test Conditions

Date: 6/5/2003

Steady-state time window: 13079 – 13148 seconds

Inlet flow rate: 2.543 cm/sec (1.001 in./sec) 

Inlet mass flow rate: 0.124 kg/sec (0.274 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-111

Figure A-91 Inlet Flow Plot for Experiment 1572I 

Figure A-92 Inlet Temperature Plot for Experiment 1572I 
A-112

Figure A-93 System Pressure Plot for Experiment 1572I 

Figure A-94 Bundle Power Plot for Experiment 1572I 
A-113

Table A-37: Data Results for RBHT Test 1572 for Time Period 13079 to 13148 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.621 21.661 1037.152 0.572 27.388 0.115 5.506 0.000 0.000 20.96 1003.570 4340.96 207846.2804 0.633 0.630 0.636

* 120-133 3048-3378 383 0.656 23.245 1112.993 0.637 30.500 0.205 9.815 -2.277 -109.007 24.68 1181.685 4365.64 209027.9652 0.634 0.631 0.637

* 108-120 2743-3048 382 0.557 27.608 1321.866 0.535 25.616 0.256 12.257 4.227 202.378 22.59 1081.615 4388.23 210109.5802 0.637 0.634 0.640

100-108 2540-2743 381 0.627 15.512 742.741 0.321 15.370 0.188 9.001 0.000 0.000 15 718.204 4403.23 210827.784 0.639 0.636 0.642

97-100 2464-2540 380 0.488 7.972 381.690 0.113 5.410 0.068 3.256 0.000 0.000 7.789 372.939 4411.019 211200.7234 0.5 0.498 0.503

93-97 2362-2464 379 0.522 9.940 475.931 0.144 6.895 0.088 4.213 0.000 0.000 9.704 464.630 4420.723 211665.3534 0.533 0.530 0.536

* 85-93 2159-2362 378 0.399 24.985 1196.294 0.265 12.688 0.170 8.140 7.140 341.870 17.41 833.595 4438.133 212498.9486 0.581 0.578 0.584

81-85 2057-2159 377 0.619 7.909 378.706 0.121 5.794 0.081 3.878 0.000 0.000 7.704 368.869 4445.837 212867.8181 0.629 0.626 0.632

78-81 1981-2057 376 0.476 8.159 390.642 0.086 4.118 0.059 2.825 0.000 0.000 8.012 383.617 4453.849 213251.4348 0.486 0.484 0.488

75-78 1905-1981 375 0.452 8.533 408.545 0.082 3.926 0.058 2.777 0.000 0.000 8.39 401.715 4462.239 213653.1501 0.461 0.459 0.463

72-75 1829-1905 374 0.383 9.618 460.515 0.078 3.735 0.057 2.729 0.000 0.000 9.478 453.809 4471.717 214106.9592 0.392 0.390 0.394

* 67-72 1702-1829 373 0.398 15.637 748.709 0.121 5.794 0.092 4.405 1.014 48.556 14.41 689.955 4486.127 214796.9137 0.445 0.443 0.447

63-67 1600-1702 372 0.491 10.584 506.765 0.088 4.213 0.071 3.399 0.000 0.000 10.42 498.912 4496.547 215295.826 0.498 0.496 0.500

60-63 1524-1600 371 0.346 10.184 487.618 0.061 2.921 0.051 2.442 0.000 0.000 10.07 482.154 4506.617 215777.9802 0.354 0.352 0.356

57-60 1448-1524 370 0.350 10.127 484.883 0.057 2.729 0.050 2.394 0.000 0.000 10.02 479.760 4516.637 216257.7403 0.357 0.355 0.359

53-57 1346-1448 369 0.316 14.204 680.080 0.069 3.304 0.065 3.112 0.000 0.000 14.06 673.196 4530.697 216930.9367 0.323 0.321 0.325

* 46-53 1168-1346 368 0.224 28.226 1351.456 0.103 4.932 0.108 5.171 3.435 164.457 24.58 1176.897 4555.277 218107.8335 0.324 0.322 0.326

43-46 1092-1168 367 0.319 10.605 507.760 0.037 1.772 0.044 2.107 0.000 0.000 10.52 503.700 4565.797 218611.5338 0.324 0.322 0.326

37-43 940-1092 366 0.207 24.720 1183.612 0.059 2.825 0.084 4.022 0.000 0.000 24.57 1176.418 4590.367 219787.9517 0.211 0.210 0.212

* 25-37 635-940 365 0.048 59.355 2841.912 0.062 2.969 0.115 5.506 5.588 267.534 53.59 2565.903 4643.957 222353.8547 0.14 0.139 0.141

13-25 330-635 364 0.068 58.061 2779.996 0.004 0.192 0.000 0.000 0.000 0.000 58.04 2778.970 4701.997 225132.8248 0.068 0.065 0.071

* 0-13 0-330 363 0.043 64.641 3095.046 0.005 0.239 0.000 0.000 -0.544 -26.029 65.18 3120.835 4767.177 228253.6599 0.034 0.032 0.036

Results for RBHT Test 1572

Valid Time Period 13079 to 13148 seconds

Collapsed Liquid Level = 91.182 inches = 2316.03 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-37 Data Results for RBHT Test 1572I for Time Period 13079 to 13148 seconds
A-114

Table A-38 Energy Balance Results for RBHT Test 1572I for Time Period 13079 to 13148 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1739.1793 5.486365 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.25 6.35 1835.8004 5.791163 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.50 12.70 1932.4215 6.095962 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

0.75 19.05 2029.0426 6.40076 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.00 25.40 2125.6636 6.705558 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.25 31.75 2222.2847 7.010356 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.50 38.10 2318.9058 7.315154 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

1.75 44.45 2415.5269 7.619952 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

2.00 50.80 2512.1479 7.92475 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

2.25 57.15 2608.769 8.229548 0.00E+00 0.00E+00 0.00E+00 8.90E-02 4.04E-02

2.50 63.50 2705.3901 8.534346 2.08E-03 1.50E-01 6.80E-02 8.89E-02 4.03E-02

2.75 69.85 2802.0112 8.839144 5.33E-03 3.84E-01 1.74E-01 8.86E-02 4.02E-02

3.00 76.20 2898.6322 9.143942 8.70E-03 6.26E-01 2.84E-01 8.83E-02 4.00E-02

3.25 82.55 2995.2533 9.44874 1.22E-02 8.76E-01 3.97E-01 8.80E-02 3.99E-02

3.50 88.90 3091.8744 9.753538 1.58E-02 1.13E+00 5.15E-01 8.76E-02 3.97E-02

3.75 95.25 3188.4955 10.05834 1.95E-02 1.40E+00 6.35E-01 8.73E-02 3.96E-02

4.00 101.60 3285.1165 10.36313 2.33E-02 1.68E+00 7.60E-01 8.70E-02 3.94E-02

4.25 107.95 3381.7376 10.66793 2.72E-02 1.96E+00 8.88E-01 8.66E-02 3.93E-02

4.50 114.30 3478.3587 10.97273 3.13E-02 2.25E+00 1.02E+00 8.63E-02 3.91E-02

4.75 120.65 3574.9798 11.27753 3.54E-02 2.55E+00 1.16E+00 8.59E-02 3.90E-02

5.00 127.00 3671.6008 11.58233 3.97E-02 2.86E+00 1.30E+00 8.55E-02 3.88E-02

5.25 133.35 3768.2219 11.88712 4.41E-02 3.17E+00 1.44E+00 8.51E-02 3.86E-02

5.50 139.70 3864.843 12.19192 4.86E-02 3.50E+00 1.59E+00 8.47E-02 3.84E-02

5.75 146.05 3961.4641 12.49672 5.32E-02 3.83E+00 1.74E+00 8.43E-02 3.82E-02

6.00 152.40 4058.0851 12.80152 5.80E-02 4.17E+00 1.89E+00 8.39E-02 3.80E-02

6.25 158.75 4154.7062 13.10632 6.28E-02 4.52E+00 2.05E+00 8.34E-02 3.78E-02

6.50 165.10 4251.3273 13.41112 6.78E-02 4.87E+00 2.21E+00 8.30E-02 3.76E-02

6.75 171.45 4347.9484 13.71591 7.28E-02 5.24E+00 2.38E+00 8.26E-02 3.74E-02

7.00 177.80 4444.5694 14.02071 7.80E-02 5.61E+00 2.55E+00 8.21E-02 3.72E-02

7.25 184.15 4541.1905 14.32551 8.33E-02 5.99E+00 2.72E+00 8.16E-02 3.70E-02

7.50 190.50 4637.8116 14.63031 8.88E-02 6.38E+00 2.90E+00 8.11E-02 3.68E-02

7.75 196.85 4734.4326 14.93511 9.43E-02 6.78E+00 3.08E+00 8.06E-02 3.66E-02

8.00 203.20 4831.0537 15.2399 9.99E-02 7.19E+00 3.26E+00 8.01E-02 3.64E-02

8.25 209.55 4927.6748 15.5447 1.06E-01 7.60E+00 3.45E+00 7.96E-02 3.61E-02

8.50 215.90 5024.2959 15.8495 1.12E-01 8.03E+00 3.64E+00 7.91E-02 3.59E-02

8.75 222.25 5120.9169 16.1543 1.18E-01 8.45E+00 3.83E+00 7.86E-02 3.56E-02

9.00 228.60 5217.538 16.4591 1.24E-01 8.89E+00 4.03E+00 7.80E-02 3.54E-02

9.25 234.95 4927.6748 15.5447 1.30E-01 9.32E+00 4.23E+00 7.75E-02 3.52E-02

9.50 241.30 4637.8116 14.63031 1.35E-01 9.73E+00 4.41E+00 7.70E-02 3.49E-02

9.75 247.65 4347.9484 13.71591 1.41E-01 1.01E+01 4.59E+00 7.65E-02 3.47E-02

10.00 254.00 4058.0851 12.80152 1.46E-01 1.05E+01 4.75E+00 7.61E-02 3.45E-02

10.25 260.35 3768.2219 11.88712 1.50E-01 1.08E+01 4.90E+00 7.57E-02 3.43E-02

10.50 266.70 3478.3587 10.97273 1.54E-01 1.11E+01 5.04E+00 7.53E-02 3.42E-02

10.75 273.05 3188.4955 10.05834 1.58E-01 1.14E+01 5.17E+00 7.49E-02 3.40E-02

11.00 279.40 2898.6322 9.143942 1.62E-01 1.17E+01 5.29E+00 7.46E-02 3.38E-02

11.25 285.75 2608.769 8.229548 1.65E-01 1.19E+01 5.39E+00 7.43E-02 3.37E-02

11.50 292.10 2318.9058 7.315154 1.68E-01 1.21E+01 5.48E+00 7.41E-02 3.36E-02

11.75 298.45 2029.0426 6.40076 1.71E-01 1.23E+01 5.57E+00 7.38E-02 3.35E-02

12.00 304.80 1739.1793 5.486365 1.73E-01 1.24E+01 5.64E+00 7.36E-02 3.34E-02

Results for RBHT Test 1572

Valid Time Period 13079 to 13148 seconds
A-115

Figure A-95 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572I for Time Period 13079 to 13148 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-116

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-J 

Test Conditions

Date: 6/5/2003

Steady-state time window: 14601 – 14739 seconds

Inlet flow rate: 0.376 cm/sec (0.148 in./sec) 

Inlet mass flow rate: 0.019 kg/sec (0.041 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-117

Figure A-96 Inlet Flow Plot for Experiment 1572J 

Figure A-97 Inlet Temperature Plot for Experiment 1572J 
A-118

Figure A-98 System Pressure Plot for Experiment 1572J 

Figure A-99 Bundle Power Plot for Experiment 1572J 
A-119

Table A-39: Data Results for RBHT Test 1572 for Time Period 14601 to 14739 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.905 5.443 260.594 0.033 1.580 0.000 0.000 0.000 0.000 5.406 258.841 4325.406 207101.5509 0.905 0.900 0.910

* 120-133 3048-3378 383 0.847 10.304 493.337 0.039 1.867 0.000 0.000 1.085 51.929 9.18 439.541 4334.586 207541.0917 0.864 0.860 0.868

* 108-120 2743-3048 382 0.704 18.426 882.238 0.056 2.681 0.006 0.287 4.734 226.662 13.63 652.608 4348.216 208193.6996 0.781 0.777 0.785

100-108 2540-2743 381 0.738 10.875 520.690 0.041 1.963 0.028 1.341 0.000 0.000 10.8 517.107 4359.016 208710.8063 0.74 0.736 0.744

97-100 2464-2540 380 0.633 5.723 274.021 0.015 0.718 0.010 0.479 0.000 0.000 5.695 272.678 4364.711 208983.4844 0.634 0.631 0.637

93-97 2362-2464 379 0.623 7.832 374.976 0.019 0.910 0.013 0.622 0.000 0.000 7.796 373.274 4372.507 209356.7589 0.625 0.622 0.628

* 85-93 2159-2362 378 0.455 22.643 1084.149 0.036 1.724 0.025 1.197 8.542 408.989 14.04 672.239 4386.547 210028.9977 0.662 0.659 0.665

81-85 2057-2159 377 0.698 6.274 300.379 0.016 0.766 0.012 0.575 0.000 0.000 6.244 298.964 4392.791 210327.962 0.699 0.696 0.70278-81 1981-2057 376 0.557 6.907 330.715 0.012 0.575 0.009 0.431 0.000 0.000 6.884 329.608 4399.675 210657.5697 0.558 0.555 0.56175-78 1905-1981 375 0.548 7.042 337.180 0.011 0.527 0.009 0.431 0.000 0.000 7.019 336.072 4406.694 210993.6412 0.549 0.546 0.55272-75 1829-1905 374 0.509 7.655 366.522 0.011 0.527 0.008 0.383 0.000 0.000 7.631 365.374 4414.325 211359.0155 0.51 0.507 0.513

* 67-72 1702-1829 373 0.423 14.988 717.627 0.017 0.814 0.014 0.670 3.867 185.151 11.09 530.992 4425.415 211890.0075 0.573 0.570 0.576

63-67 1600-1702 372 0.635 7.587 363.289 0.012 0.575 0.010 0.479 0.000 0.000 7.563 362.118 4432.978 212252.1259 0.636 0.633 0.63960-63 1524-1600 371 0.438 8.761 419.486 0.009 0.431 0.008 0.383 0.000 0.000 8.741 418.521 4441.719 212670.6472 0.439 0.437 0.44157-60 1448-1524 370 0.431 8.860 424.211 0.008 0.383 0.007 0.335 0.000 0.000 8.841 423.309 4450.56 213093.9566 0.432 0.430 0.43453-57 1346-1448 369 0.414 12.173 582.854 0.010 0.479 0.010 0.479 0.000 0.000 12.15 581.745 4462.71 213675.7017 0.415 0.413 0.417

* 46-53 1168-1346 368 0.280 26.185 1253.734 0.016 0.766 0.016 0.766 7.103 340.082 19.05 912.119 4481.76 214587.8206 0.476 0.474 0.478

43-46 1092-1168 367 0.536 7.234 346.381 0.006 0.287 0.006 0.287 0.000 0.000 7.217 345.552 4488.977 214933.3724 0.537 0.534 0.54037-43 940-1092 366 0.412 18.327 877.514 0.011 0.527 0.012 0.575 0.000 0.000 18.3 876.209 4507.277 215809.5811 0.413 0.411 0.415

* 25-37 635-940 365 0.254 46.485 2225.738 0.018 0.862 0.022 1.053 4.815 230.567 41.63 1993.255 4548.907 217802.8362 0.332 0.330 0.334

13-25 330-635 364 0.250 46.714 2236.678 0.011 0.527 0.019 0.910 0.000 0.000 46.67 2234.572 4595.577 220037.4078 0.251 0.250 0.252

* 0-13 0-330 363 0.065 63.151 3023.681 0.005 0.239 0.010 0.479 4.106 196.591 59.03 2826.372 4654.607 222863.7794 0.125 0.124 0.126

 (Z2φ) Two-Phase Level (Dryout) = 131.60 inches = 3342.64 mm

 (S) Level Swell = 1.957

Results for RBHT Test 1572

Valid Time Period 14601 to 14739 seconds

Collapsed Liquid Level = 69.910 inches = 1775.71 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-39 Data Results for RBHT Test 1572

J for Time Period 14601 to 14739 seconds
A-120

Table A-40 Energy Balance Results for RBHT Test 1572J for Time Period 14601 to 14739 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.3265 5.489984 0.00E+00 0.00E+00 0.00E+00 1.31E-02 5.96E-03

0.25 6.35 1837.0113 5.794983 0.00E+00 0.00E+00 0.00E+00 1.31E-02 5.96E-03

0.50 12.70 1933.6961 6.099982 2.86E-03 3.04E-02 1.38E-02 1.31E-02 5.95E-03

0.75 19.05 2030.3809 6.404982 1.87E-02 1.99E-01 9.01E-02 1.29E-02 5.85E-03

1.00 25.40 2127.0657 6.709981 3.53E-02 3.75E-01 1.70E-01 1.27E-02 5.75E-03

1.25 31.75 2223.7505 7.01498 5.27E-02 5.60E-01 2.54E-01 1.25E-02 5.65E-03

1.50 38.10 2320.4353 7.319979 7.09E-02 7.53E-01 3.41E-01 1.22E-02 5.54E-03

1.75 44.45 2417.1202 7.624978 8.98E-02 9.54E-01 4.33E-01 1.20E-02 5.43E-03

2.00 50.80 2513.805 7.929977 1.10E-01 1.16E+00 5.27E-01 1.17E-02 5.31E-03

2.25 57.15 2610.4898 8.234976 1.30E-01 1.38E+00 6.26E-01 1.14E-02 5.19E-03

2.50 63.50 2707.1746 8.539975 1.51E-01 1.61E+00 7.28E-01 1.12E-02 5.06E-03

2.75 69.85 2803.8594 8.844975 1.73E-01 1.84E+00 8.35E-01 1.09E-02 4.93E-03

3.00 76.20 2900.5442 9.149974 1.96E-01 2.08E+00 9.45E-01 1.06E-02 4.79E-03

3.25 82.55 2997.229 9.454973 2.20E-01 2.33E+00 1.06E+00 1.03E-02 4.65E-03

3.50 88.90 3093.9138 9.759972 2.44E-01 2.59E+00 1.18E+00 9.94E-03 4.51E-03

3.75 95.25 3190.5986 10.06497 2.69E-01 2.86E+00 1.30E+00 9.61E-03 4.36E-03

4.00 101.60 3287.2834 10.36997 2.95E-01 3.13E+00 1.42E+00 9.27E-03 4.20E-03

4.25 107.95 3383.9682 10.67497 3.22E-01 3.42E+00 1.55E+00 8.92E-03 4.04E-03

4.50 114.30 3480.653 10.97997 3.49E-01 3.71E+00 1.68E+00 8.56E-03 3.88E-03

4.75 120.65 3577.3378 11.28497 3.77E-01 4.01E+00 1.82E+00 8.19E-03 3.71E-03

5.00 127.00 3674.0226 11.58997 4.06E-01 4.31E+00 1.96E+00 7.80E-03 3.54E-03

5.25 133.35 3770.7074 11.89497 4.36E-01 4.63E+00 2.10E+00 7.41E-03 3.36E-03

5.50 139.70 3867.3922 12.19996 4.67E-01 4.96E+00 2.25E+00 7.01E-03 3.18E-03

5.75 146.05 3964.077 12.50496 4.98E-01 5.29E+00 2.40E+00 6.60E-03 2.99E-03

6.00 152.40 4060.7619 12.80996 5.30E-01 5.63E+00 2.55E+00 6.18E-03 2.80E-03

6.25 158.75 4157.4467 13.11496 5.63E-01 5.98E+00 2.71E+00 5.75E-03 2.61E-03

6.50 165.10 4254.1315 13.41996 5.96E-01 6.33E+00 2.87E+00 5.31E-03 2.41E-03

6.75 171.45 4350.8163 13.72496 6.31E-01 6.70E+00 3.04E+00 4.85E-03 2.20E-03

7.00 177.80 4447.5011 14.02996 6.66E-01 7.07E+00 3.21E+00 4.39E-03 1.99E-03

7.25 184.15 4544.1859 14.33496 7.02E-01 7.45E+00 3.38E+00 3.92E-03 1.78E-03

7.50 190.50 4640.8707 14.63996 7.39E-01 7.84E+00 3.56E+00 3.44E-03 1.56E-03

7.75 196.85 4737.5555 14.94496 7.76E-01 8.24E+00 3.74E+00 2.94E-03 1.34E-03

8.00 203.20 4834.2403 15.24996 8.14E-01 8.65E+00 3.92E+00 2.44E-03 1.11E-03

8.25 209.55 4930.9251 15.55496 8.53E-01 9.06E+00 4.11E+00 1.93E-03 8.74E-04

8.50 215.90 5027.6099 15.85995 8.93E-01 9.49E+00 4.30E+00 1.40E-03 6.37E-04

8.75 222.25 5124.2947 16.16495 9.34E-01 9.92E+00 4.50E+00 8.72E-04 3.95E-04

9.00 228.60 5220.9795 16.46995 9.75E-01 1.04E+01 4.70E+00 3.27E-04 1.48E-04

9.25 234.95 4930.9251 15.55496 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

9.50 241.30 4640.8707 14.63996 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

9.75 247.65 4350.8163 13.72496 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

10.00 254.00 4060.7619 12.80996 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

10.25 260.35 3770.7074 11.89497 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

10.50 266.70 3480.653 10.97997 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

10.75 273.05 3190.5986 10.06497 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

11.00 279.40 2900.5442 9.149974 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

11.25 285.75 2610.4898 8.234976 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

11.50 292.10 2320.4353 7.319979 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

11.75 298.45 2030.3809 6.404982 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

12.00 304.80 1740.3265 5.489984 1.00E+00 1.06E+01 4.82E+00 0.00E+00 0.00E+00

Results for RBHT Test 1572

Valid Time Period 14601 to 14739 seconds
A-121

Figure A-100 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572J for Time Period 14601 to 14739 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-122

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-K 

Test Conditions

Date: 6/5/2003

Steady-state time window: 14820 – 14940 seconds

Inlet flow rate: 0.348 cm/sec (0.137 in./sec) 

Inlet mass flow rate: 0.017 kg/sec (0.038 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-123

Figure A-101 Inlet Flow Plot for Experiment 1572K 

Figure A-102 Inlet Temperature Plot for Experiment 1572K 
A-124

Figure A-103 System Pressure Plot for Experiment 1572K 

Figure A-104 Bundle Power Plot for Experiment 1572K 
A-125

Table A-41: Data Results for RBHT Test 1572 for Time Period 14820 to 14940 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.976 1.397 66.889 0.028 1.341 0.000 0.000 0.000 0.000 1.369 65.548 4321.369 206908.2583 0.976 0.971 0.981

* 120-133 3048-3378 383 0.947 3.573 171.077 0.033 1.580 0.000 0.000 -1.401 -67.080 4.941 236.576 4326.31 207144.8347 0.927 0.922 0.932

* 108-120 2743-3048 382 0.797 12.635 604.985 0.031 1.484 0.000 0.000 1.904 91.182 10.7 512.319 4337.01 207657.1534 0.828 0.824 0.832

100-108 2540-2743 381 0.778 9.229 441.865 0.034 1.628 0.014 0.670 0.000 0.000 9.177 439.397 4346.187 208096.5505 0.779 0.775 0.783

97-100 2464-2540 380 0.682 4.949 236.971 0.013 0.622 0.009 0.431 0.000 0.000 4.924 235.762 4351.111 208332.3129 0.684 0.681 0.687

93-97 2362-2464 379 0.673 6.793 325.245 0.017 0.814 0.012 0.575 0.000 0.000 6.761 323.718 4357.872 208656.0313 0.674 0.671 0.677

* 85-93 2159-2362 378 0.487 21.324 1020.990 0.033 1.580 0.023 1.101 8.418 403.047 12.85 615.261 4370.722 209271.2926 0.691 0.688 0.694

81-85 2057-2159 377 0.706 6.118 292.919 0.015 0.718 0.011 0.527 0.000 0.000 6.092 291.687 4376.814 209562.9792 0.707 0.703 0.711

78-81 1981-2057 376 0.556 6.912 330.964 0.011 0.527 0.008 0.383 0.000 0.000 6.89 329.895 4383.704 209892.8741 0.558 0.555 0.561

75-78 1905-1981 375 0.553 6.969 333.699 0.010 0.479 0.008 0.383 0.000 0.000 6.949 332.720 4390.653 210225.594 0.554 0.551 0.557

72-75 1829-1905 374 0.515 7.551 361.549 0.010 0.479 0.008 0.383 0.000 0.000 7.53 360.538 4398.183 210586.1324 0.517 0.514 0.520

* 67-72 1702-1829 373 0.415 15.180 726.827 0.016 0.766 0.013 0.622 4.161 199.235 10.99 526.204 4409.173 211112.3364 0.577 0.574 0.580

63-67 1600-1702 372 0.636 7.572 362.543 0.011 0.527 0.010 0.479 0.000 0.000 7.55 361.496 4416.723 211473.8323 0.636 0.633 0.639

60-63 1524-1600 371 0.432 8.849 423.713 0.008 0.383 0.007 0.335 0.000 0.000 8.831 422.831 4425.554 211896.6629 0.433 0.431 0.435

57-60 1448-1524 370 0.438 8.761 419.486 0.008 0.383 0.007 0.335 0.000 0.000 8.743 418.617 4434.297 212315.28 0.439 0.437 0.441

53-57 1346-1448 369 0.419 12.080 578.378 0.010 0.479 0.009 0.431 0.000 0.000 12.06 577.436 4446.357 212892.7159 0.419 0.417 0.421

* 46-53 1168-1346 368 0.279 26.206 1254.728 0.015 0.718 0.015 0.718 7.176 343.567 19 909.725 4465.357 213802.4408 0.477 0.475 0.479

43-46 1092-1168 367 0.534 7.255 347.375 0.006 0.287 0.006 0.287 0.000 0.000 7.241 346.701 4472.598 214149.1417 0.535 0.532 0.538

37-43 940-1092 366 0.415 18.234 873.038 0.010 0.479 0.011 0.527 0.000 0.000 18.21 871.899 4490.808 215021.0412 0.416 0.414 0.418

* 25-37 635-940 365 0.255 46.460 2224.494 0.016 0.766 0.021 1.005 4.763 228.031 41.66 1994.692 4532.468 217015.7327 0.331 0.329 0.333

13-25 330-635 364 0.247 46.958 2248.365 0.010 0.479 0.018 0.862 0.000 0.000 46.91 2246.063 4579.378 219261.7955 0.247 0.246 0.248

* 0-13 0-330 363 0.065 63.115 3021.940 0.005 0.239 0.010 0.479 3.940 188.626 59.16 2832.596 4638.538 222094.3915 0.124 0.123 0.125

 (Z2φ) Two-Phase Level (Dryout) = 122.70 inches = 3116.58 mm

 (S) Level Swell = 1.927

Results for RBHT Test 1572

Valid Time Period 14820 to 14940 seconds

Collapsed Liquid Level = 66.141 inches = 1679.98 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-41 Data Results for RBHT Test 1572

K for Time Period 14820 to 14940 seconds
A-126

Table A-42 Energy Balance Results for RBHT Test 1572K for Time Period 14820 to 14940 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.9716 5.492019 0.00E+00 0.00E+00 0.00E+00 1.22E-02 5.54E-03

0.25 6.35 1837.6922 5.797131 0.00E+00 0.00E+00 0.00E+00 1.22E-02 5.54E-03

0.50 12.70 1934.4128 6.102243 4.76E-03 4.70E-02 2.13E-02 1.21E-02 5.51E-03

0.75 19.05 2031.1335 6.407356 2.18E-02 2.15E-01 9.76E-02 1.19E-02 5.42E-03

1.00 25.40 2127.8541 6.712468 3.97E-02 3.92E-01 1.78E-01 1.17E-02 5.32E-03

1.25 31.75 2224.5748 7.01758 5.85E-02 5.77E-01 2.62E-01 1.15E-02 5.21E-03

1.50 38.10 2321.2954 7.322692 7.80E-02 7.70E-01 3.49E-01 1.13E-02 5.10E-03

1.75 44.45 2418.0161 7.627804 9.85E-02 9.71E-01 4.40E-01 1.10E-02 4.99E-03

2.00 50.80 2514.7367 7.932916 1.20E-01 1.18E+00 5.35E-01 1.07E-02 4.87E-03

2.25 57.15 2611.4573 8.238029 1.42E-01 1.40E+00 6.34E-01 1.05E-02 4.75E-03

2.50 63.50 2708.178 8.543141 1.65E-01 1.62E+00 7.36E-01 1.02E-02 4.62E-03

2.75 69.85 2804.8986 8.848253 1.88E-01 1.86E+00 8.43E-01 9.91E-03 4.49E-03

3.00 76.20 2901.6193 9.153365 2.13E-01 2.10E+00 9.52E-01 9.61E-03 4.36E-03

3.25 82.55 2998.3399 9.458477 2.38E-01 2.35E+00 1.07E+00 9.30E-03 4.22E-03

3.50 88.90 3095.0606 9.763589 2.65E-01 2.61E+00 1.18E+00 8.98E-03 4.07E-03

3.75 95.25 3191.7812 10.0687 2.92E-01 2.88E+00 1.30E+00 8.65E-03 3.92E-03

4.00 101.60 3288.5018 10.37381 3.20E-01 3.15E+00 1.43E+00 8.31E-03 3.77E-03

4.25 107.95 3385.2225 10.67893 3.48E-01 3.43E+00 1.56E+00 7.95E-03 3.61E-03

4.50 114.30 3481.9431 10.98404 3.78E-01 3.73E+00 1.69E+00 7.59E-03 3.44E-03

4.75 120.65 3578.6638 11.28915 4.08E-01 4.03E+00 1.83E+00 7.22E-03 3.28E-03

5.00 127.00 3675.3844 11.59426 4.40E-01 4.33E+00 1.97E+00 6.84E-03 3.10E-03

5.25 133.35 3772.1051 11.89937 4.72E-01 4.65E+00 2.11E+00 6.45E-03 2.93E-03

5.50 139.70 3868.8257 12.20449 5.04E-01 4.97E+00 2.26E+00 6.05E-03 2.74E-03

5.75 146.05 3965.5463 12.5096 5.38E-01 5.31E+00 2.41E+00 5.64E-03 2.56E-03

6.00 152.40 4062.267 12.81471 5.73E-01 5.65E+00 2.56E+00 5.22E-03 2.37E-03

6.25 158.75 4158.9876 13.11982 6.08E-01 6.00E+00 2.72E+00 4.78E-03 2.17E-03

6.50 165.10 4255.7083 13.42494 6.44E-01 6.35E+00 2.88E+00 4.34E-03 1.97E-03

6.75 171.45 4352.4289 13.73005 6.81E-01 6.72E+00 3.05E+00 3.89E-03 1.76E-03

7.00 177.80 4449.1496 14.03516 7.19E-01 7.09E+00 3.22E+00 3.43E-03 1.55E-03

7.25 184.15 4545.8702 14.34027 7.58E-01 7.47E+00 3.39E+00 2.95E-03 1.34E-03

7.50 190.50 4642.5908 14.64538 7.98E-01 7.86E+00 3.57E+00 2.47E-03 1.12E-03

7.75 196.85 4739.3115 14.9505 8.38E-01 8.26E+00 3.75E+00 1.98E-03 8.97E-04

8.00 203.20 4836.0321 15.25561 8.79E-01 8.67E+00 3.93E+00 1.48E-03 6.69E-04

8.25 209.55 4932.7528 15.56072 9.21E-01 9.08E+00 4.12E+00 9.62E-04 4.36E-04

8.50 215.90 5029.4734 15.86583 9.64E-01 9.51E+00 4.31E+00 4.38E-04 1.99E-04

8.75 222.25 5126.1941 16.17095 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

9.00 228.60 5222.9147 16.47606 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

9.25 234.95 4932.7528 15.56072 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

9.50 241.30 4642.5908 14.64538 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

9.75 247.65 4352.4289 13.73005 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

10.00 254.00 4062.267 12.81471 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

10.25 260.35 3772.1051 11.89937 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

10.50 266.70 3481.9431 10.98404 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

10.75 273.05 3191.7812 10.0687 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

11.00 279.40 2901.6193 9.153365 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

11.25 285.75 2611.4573 8.238029 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

11.50 292.10 2321.2954 7.322692 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

11.75 298.45 2031.1335 6.407356 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

12.00 304.80 1740.9716 5.492019 1.00E+00 9.86E+00 4.47E+00 0.00E+00 0.00E+00

Results for RBHT Test 1572

Valid Time Period 14820 to 14940 seconds
A-127

Figure A-105 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572K for Time Period 14820 to 14940 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-128

RBHT Two-Phase Mixture Level and Uncovery Test INT-1572-L 

Test Conditions

Date: 6/5/2003

Steady-state time window: 15411 – 15456 seconds

Inlet flow rate: 0.284 cm/sec (0.112 in./sec) 

Inlet mass flow rate: 0.014 kg/sec (0.031 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.92 kW 
A-129

Figure A-106 Inlet Flow Plot for Experiment 1572L 

Figure A-107 Inlet Temperature Plot for Experiment 1572L 
A-130

Figure A-108 System Pressure Plot for Experiment 1572L 

Figure A-109 Bundle Power Plot for Experiment 1572L 
A-131

Table A-43: Data Results for RBHT Test 1572 for Time Period 15411 to 15456 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.986 0.784 37.547 0.019 0.910 0.000 0.000 0.000 0.000 0.763 36.533 4320.763 206879.2429 0.987 0.982 0.992

* 120-133 3048-3378 383 0.994 0.400 19.147 0.022 1.053 0.000 0.000 -1.235 -59.138 1.613 77.231 4322.376 206956.4737 0.976 0.971 0.981

* 108-120 2743-3048 382 0.971 1.807 86.533 0.020 0.958 0.000 0.000 -1.015 -48.585 2.802 134.160 4325.178 207090.6342 0.955 0.950 0.960

100-108 2540-2743 381 0.944 2.321 111.150 0.014 0.670 0.000 0.000 0.000 0.000 2.305 110.364 4327.483 207200.9982 0.945 0.940 0.950

97-100 2464-2540 380 0.886 1.776 85.041 0.005 0.239 0.000 0.000 0.000 0.000 1.773 84.892 4329.256 207285.8899 0.886 0.882 0.890

93-97 2362-2464 379 0.838 3.360 160.882 0.007 0.335 0.000 0.000 0.000 0.000 3.35 160.399 4332.606 207446.2888 0.839 0.835 0.843

* 85-93 2159-2362 378 0.673 13.596 650.987 0.023 1.101 0.014 0.670 4.133 197.896 9.426 451.319 4342.032 207897.6081 0.773 0.769 0.777

81-85 2057-2159 377 0.707 6.097 291.924 0.012 0.575 0.009 0.431 0.000 0.000 6.076 290.920 4348.108 208188.5285 0.707 0.703 0.71178-81 1981-2057 376 0.580 6.538 313.060 0.009 0.431 0.007 0.335 0.000 0.000 6.519 312.131 4354.627 208500.6599 0.582 0.579 0.58575-78 1905-1981 375 0.517 7.530 360.554 0.008 0.383 0.006 0.287 0.000 0.000 7.512 359.676 4362.139 208860.3364 0.518 0.515 0.52172-75 1829-1905 374 0.473 8.211 393.128 0.008 0.383 0.006 0.287 0.000 0.000 8.194 392.331 4370.333 209252.6672 0.474 0.472 0.476

* 67-72 1702-1829 373 0.411 15.305 732.795 0.012 0.575 0.010 0.479 2.623 125.578 12.66 606.164 4382.993 209858.8313 0.512 0.509 0.515

63-67 1600-1702 372 0.550 9.358 448.082 0.009 0.431 0.008 0.383 0.000 0.000 9.337 447.058 4392.33 210305.8892 0.55 0.547 0.55360-63 1524-1600 371 0.402 9.312 445.844 0.007 0.335 0.006 0.287 0.000 0.000 9.296 445.095 4401.626 210750.9841 0.403 0.401 0.40557-60 1448-1524 370 0.395 9.431 451.563 0.006 0.287 0.006 0.287 0.000 0.000 9.418 450.936 4411.044 211201.9204 0.395 0.393 0.39753-57 1346-1448 369 0.354 13.414 642.284 0.008 0.383 0.007 0.335 0.000 0.000 13.4 641.595 4424.444 211843.5158 0.355 0.353 0.357

* 46-53 1168-1346 368 0.253 27.156 1300.233 0.012 0.575 0.012 0.575 5.272 252.421 21.86 1046.662 4446.304 212890.1782 0.398 0.396 0.400

43-46 1092-1168 367 0.441 8.704 416.751 0.005 0.239 0.005 0.239 0.000 0.000 8.692 416.175 4454.996 213306.3534 0.442 0.440 0.44437-43 940-1092 366 0.364 19.807 948.382 0.008 0.383 0.009 0.431 0.000 0.000 19.78 947.071 4474.776 214253.4249 0.365 0.363 0.367

* 25-37 635-940 365 0.259 46.153 2209.823 0.013 0.622 0.017 0.814 3.233 154.803 42.89 2053.584 4517.666 216307.0091 0.312 0.310 0.314

13-25 330-635 364 0.258 46.257 2214.797 0.008 0.383 0.015 0.718 0.000 0.000 46.22 2213.025 4563.886 218520.0346 0.258 0.257 0.259

* 0-13 0-330 363 0.075 62.439 2989.615 0.004 0.192 0.009 0.431 3.646 174.591 58.78 2814.402 4622.666 221334.4361 0.129 0.128 0.130

 (Z2φ) Two-Phase Level (Dryout) = 97.20 inches = 2468.88 mm

 (S) Level Swell = 1.774

Results for RBHT Test 1572

Valid Time Period 15411 to 15456 seconds

Collapsed Liquid Level = 56.494 inches = 1434.93 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-43 Data Results for RBHT Test 1572

L for Time Period 15411 to 15456 seconds
A-132

Table A-44 Energy Balance Results for RBHT Test 1572L for Time Period 15411 to 15456 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.3028 5.489909 0.00E+00 0.00E+00 0.00E+00 9.93E-03 4.51E-03

0.25 6.35 1836.9863 5.794904 0.00E+00 0.00E+00 0.00E+00 9.93E-03 4.51E-03

0.50 12.70 1933.6698 6.099899 1.41E-02 1.13E-01 5.14E-02 9.79E-03 4.44E-03

0.75 19.05 2030.3533 6.404894 3.51E-02 2.82E-01 1.28E-01 9.58E-03 4.35E-03

1.00 25.40 2127.0367 6.709889 5.71E-02 4.58E-01 2.08E-01 9.37E-03 4.25E-03

1.25 31.75 2223.7202 7.014884 8.01E-02 6.43E-01 2.92E-01 9.14E-03 4.14E-03

1.50 38.10 2320.4037 7.319879 1.04E-01 8.36E-01 3.79E-01 8.90E-03 4.04E-03

1.75 44.45 2417.0872 7.624874 1.29E-01 1.04E+00 4.71E-01 8.65E-03 3.92E-03

2.00 50.80 2513.7707 7.929869 1.55E-01 1.25E+00 5.66E-01 8.39E-03 3.81E-03

2.25 57.15 2610.4542 8.234864 1.82E-01 1.47E+00 6.65E-01 8.12E-03 3.68E-03

2.50 63.50 2707.1377 8.539859 2.11E-01 1.69E+00 7.67E-01 7.84E-03 3.56E-03

2.75 69.85 2803.8212 8.844854 2.40E-01 1.92E+00 8.73E-01 7.55E-03 3.43E-03

3.00 76.20 2900.5047 9.149849 2.70E-01 2.17E+00 9.83E-01 7.25E-03 3.29E-03

3.25 82.55 2997.1881 9.454844 3.01E-01 2.42E+00 1.10E+00 6.94E-03 3.15E-03

3.50 88.90 3093.8716 9.759839 3.33E-01 2.68E+00 1.21E+00 6.62E-03 3.00E-03

3.75 95.25 3190.5551 10.06483 3.67E-01 2.94E+00 1.34E+00 6.29E-03 2.85E-03

4.00 101.60 3287.2386 10.36983 4.01E-01 3.22E+00 1.46E+00 5.95E-03 2.70E-03

4.25 107.95 3383.9221 10.67482 4.36E-01 3.50E+00 1.59E+00 5.60E-03 2.54E-03

4.50 114.30 3480.6056 10.97982 4.72E-01 3.79E+00 1.72E+00 5.24E-03 2.38E-03

4.75 120.65 3577.2891 11.28481 5.10E-01 4.09E+00 1.86E+00 4.87E-03 2.21E-03

5.00 127.00 3673.9726 11.58981 5.48E-01 4.40E+00 2.00E+00 4.49E-03 2.04E-03

5.25 133.35 3770.656 11.8948 5.87E-01 4.72E+00 2.14E+00 4.10E-03 1.86E-03

5.50 139.70 3867.3395 12.1998 6.28E-01 5.04E+00 2.29E+00 3.70E-03 1.68E-03

5.75 146.05 3964.023 12.50479 6.69E-01 5.38E+00 2.44E+00 3.29E-03 1.49E-03

6.00 152.40 4060.7065 12.80979 7.12E-01 5.72E+00 2.59E+00 2.86E-03 1.30E-03

6.25 158.75 4157.39 13.11478 7.55E-01 6.07E+00 2.75E+00 2.43E-03 1.10E-03

6.50 165.10 4254.0735 13.41978 8.00E-01 6.42E+00 2.91E+00 1.99E-03 9.03E-04

6.75 171.45 4350.757 13.72477 8.45E-01 6.79E+00 3.08E+00 1.54E-03 6.98E-04

7.00 177.80 4447.4405 14.02977 8.92E-01 7.16E+00 3.25E+00 1.08E-03 4.88E-04

7.25 184.15 4544.124 14.33476 9.39E-01 7.54E+00 3.42E+00 6.04E-04 2.74E-04

7.50 190.50 4640.8074 14.63976 9.88E-01 7.93E+00 3.60E+00 1.21E-04 5.50E-05

7.75 196.85 4737.4909 14.94475 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

8.00 203.20 4834.1744 15.24975 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

8.25 209.55 4930.8579 15.55474 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

8.50 215.90 5027.5414 15.85974 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

8.75 222.25 5124.2249 16.16473 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

9.00 228.60 5220.9084 16.46973 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

9.25 234.95 4930.8579 15.55474 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

9.50 241.30 4640.8074 14.63976 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

9.75 247.65 4350.757 13.72477 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

10.00 254.00 4060.7065 12.80979 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

10.25 260.35 3770.656 11.8948 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

10.50 266.70 3480.6056 10.97982 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

10.75 273.05 3190.5551 10.06483 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

11.00 279.40 2900.5047 9.149849 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

11.25 285.75 2610.4542 8.234864 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

11.50 292.10 2320.4037 7.319879 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

11.75 298.45 2030.3533 6.404894 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

12.00 304.80 1740.3028 5.489909 1.00E+00 8.03E+00 3.64E+00 0.00E+00 0.00E+00

Results for RBHT Test 1572

Valid Time Period 15411 to 15456 seconds
A-133

Figure A-110 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1572L for Time Period 15411 to 15456 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-134

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-A 

Test Conditions

Date: 6/10/2003

Steady-state time window: 930 – 1040 seconds

Inlet flow rate: 2.515 cm/sec (0.990 in./sec) 

Inlet mass flow rate: 0.120 kg/sec (0.265 lbm/sec) 

Inlet flow temperature: 382.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-135

Figure A-111 Inlet Flow Plot for Experiment 1578A 

Figure A-112 Inlet Temperature Plot for Experiment 1578A 
A-136

Figure A-113 System Pressure Plot for Experiment 1578A 

Figure A-114 Bundle Power Plot for Experiment 1578A 
A-137

Table A-45: Data Results for RBHT Test 1578 for Time Period 930 to 1040 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.681 18.213 872.044 0.688 32.942 0.214 10.246 0.000 0.000 17.31 828.807 2897.31 138723.9474 0.697 0.694 0.700

* 120-133 3048-3378 383 0.676 21.843 1045.855 0.745 35.671 0.382 18.290 -0.584 -27.955 21.3 1019.849 2918.61 139743.7969 0.684 0.681 0.687

* 108-120 2743-3048 382 0.573 26.590 1273.129 0.594 28.441 0.476 22.791 4.300 205.878 21.22 1016.019 2939.83 140759.8159 0.659 0.656 0.662

100-108 2540-2743 381 0.631 15.351 735.033 0.333 15.944 0.348 16.662 0.000 0.000 14.67 702.403 2954.5 141462.2193 0.647 0.644 0.650

97-100 2464-2540 380 0.473 8.211 393.128 0.110 5.267 0.126 6.033 0.000 0.000 7.973 381.749 2962.473 141843.9686 0.488 0.486 0.490

93-97 2362-2464 379 0.479 10.823 518.203 0.135 6.464 0.164 7.852 0.000 0.000 10.52 503.700 2972.993 142347.6689 0.493 0.491 0.495

* 85-93 2159-2362 378 0.368 26.278 1258.209 0.226 10.821 0.315 15.082 4.617 221.075 21.12 1011.231 2994.113 143358.8999 0.492 0.490 0.494

81-85 2057-2159 377 0.478 10.838 518.949 0.090 4.309 0.151 7.230 0.000 0.000 10.6 507.531 3004.713 143866.4307 0.49 0.488 0.492

78-81 1981-2057 376 0.335 10.366 496.321 0.057 2.729 0.110 5.267 0.000 0.000 10.19 487.900 3014.903 144354.3305 0.346 0.344 0.348

75-78 1905-1981 375 0.288 11.088 530.885 0.047 2.250 0.108 5.171 0.000 0.000 10.93 523.331 3025.833 144877.6617 0.298 0.297 0.299

72-75 1829-1905 374 0.214 12.246 586.336 0.036 1.724 0.105 5.027 0.000 0.000 12.1 579.351 3037.933 145457.0128 0.223 0.222 0.224

* 67-72 1702-1829 373 0.102 23.323 1116.723 0.032 1.532 0.161 7.709 0.580 27.782 22.55 1079.700 3060.483 146536.7126 0.132 0.131 0.133

63-67 1600-1702 372 0.040 19.948 955.095 0.001 0.048 0.000 0.000 0.000 0.000 19.94 954.732 3080.423 147491.4449 0.04 0.038 0.042

60-63 1524-1600 371 0.013 15.372 736.028 0.001 0.048 0.000 0.000 0.000 0.000 15.37 735.920 3095.793 148227.3645 0.013 0.012 0.014

57-60 1448-1524 370 0.051 14.780 707.681 0.001 0.048 0.000 0.000 0.000 0.000 14.78 707.670 3110.573 148935.0347 0.051 0.048 0.054

53-57 1346-1448 369 0.037 20.010 958.079 0.001 0.048 0.000 0.000 0.000 0.000 20 957.605 3130.573 149892.6398 0.037 0.035 0.039

* 46-53 1168-1346 368 0.035 35.086 1679.933 0.002 0.096 0.000 0.000 -0.156 -7.463 35.24 1687.300 3165.813 151579.9401 0.03 0.029 0.032

43-46 1092-1168 367 0.024 15.206 728.071 0.001 0.048 0.000 0.000 0.000 0.000 15.2 727.780 3181.013 152307.72 0.024 0.023 0.025

37-43 940-1092 366 0.027 30.324 1451.914 0.002 0.096 0.000 0.000 0.000 0.000 30.31 1451.251 3211.323 153758.9706 0.027 0.026 0.028

* 25-37 635-940 365 0.019 61.157 2928.196 0.004 0.192 0.000 0.000 0.273 13.055 60.88 2914.950 3272.203 156673.9206 0.023 0.022 0.024

13-25 330-635 364 0.019 61.157 2928.196 0.004 0.192 0.000 0.000 0.000 0.000 61.13 2926.920 3333.333 159600.8407 0.019 0.018 0.020

* 0-13 0-330 363 0.009 66.926 3204.455 0.004 0.192 0.000 0.000 0.062 2.990 66.86 3201.274 3400.193 162802.1147 0.009 0.009 0.009

Results for RBHT Test 1578

Valid Time Period 930 to 1040 seconds

Collapsed Liquid Level = 103.244 inches = 2622.41 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-45 Data Results for RBHT Test 1578A for Time Period 930 to 1040 seconds
A-138

Table A-46 Energy Balance Results for RBHT Test 1578A for Time Period 930 to 1040 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2325.5858 7.336227 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

0.25 6.35 2454.785 7.743795 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

0.50 12.70 2583.9843 8.151363 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

0.75 19.05 2713.1835 8.558931 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

1.00 25.40 2842.3827 8.966499 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

1.25 31.75 2971.5819 9.374067 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

1.50 38.10 3100.7811 9.781635 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

1.75 44.45 3229.9803 10.1892 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

2.00 50.80 3359.1795 10.59677 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

2.25 57.15 3488.3788 11.00434 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

2.50 63.50 3617.578 11.41191 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

2.75 69.85 3746.7772 11.81948 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

3.00 76.20 3875.9764 12.22704 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

3.25 82.55 4005.1756 12.63461 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

3.50 88.90 4134.3748 13.04218 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

3.75 95.25 4263.574 13.44975 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

4.00 101.60 4392.7732 13.85732 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

4.25 107.95 4521.9725 14.26488 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

4.50 114.30 4651.1717 14.67245 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

4.75 120.65 4780.3709 15.08002 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

5.00 127.00 4909.5701 15.48759 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

5.25 133.35 5038.7693 15.89516 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

5.50 139.70 5167.9685 16.30273 0.00E+00 0.00E+00 0.00E+00 8.50E-02 3.86E-02

5.75 146.05 5297.1677 16.71029 3.61E-03 3.66E-01 1.66E-01 8.47E-02 3.84E-02

6.00 152.40 5426.3669 17.11786 1.01E-02 1.02E+00 4.63E-01 8.42E-02 3.82E-02

6.25 158.75 5555.5662 17.52543 1.67E-02 1.69E+00 7.68E-01 8.36E-02 3.79E-02

6.50 165.10 5684.7654 17.933 2.34E-02 2.38E+00 1.08E+00 8.30E-02 3.77E-02

6.75 171.45 5813.9646 18.34057 3.04E-02 3.08E+00 1.40E+00 8.25E-02 3.74E-02

7.00 177.80 5943.1638 18.74813 3.75E-02 3.80E+00 1.72E+00 8.19E-02 3.71E-02

7.25 184.15 6072.363 19.1557 4.47E-02 4.53E+00 2.06E+00 8.12E-02 3.68E-02

7.50 190.50 6201.5622 19.56327 5.21E-02 5.28E+00 2.40E+00 8.06E-02 3.66E-02

7.75 196.85 6330.7614 19.97084 5.96E-02 6.05E+00 2.74E+00 8.00E-02 3.63E-02

8.00 203.20 6459.9607 20.37841 6.73E-02 6.83E+00 3.10E+00 7.93E-02 3.60E-02

8.25 209.55 6589.1599 20.78598 7.52E-02 7.63E+00 3.46E+00 7.86E-02 3.57E-02

8.50 215.90 6718.3591 21.19354 8.32E-02 8.44E+00 3.83E+00 7.80E-02 3.54E-02

8.75 222.25 6847.5583 21.60111 9.14E-02 9.27E+00 4.20E+00 7.73E-02 3.50E-02

9.00 228.60 6976.7575 22.00868 9.97E-02 1.01E+01 4.59E+00 7.66E-02 3.47E-02

9.25 234.95 6589.1599 20.78598 1.08E-01 1.09E+01 4.96E+00 7.59E-02 3.44E-02

9.50 241.30 6201.5622 19.56327 1.16E-01 1.17E+01 5.31E+00 7.52E-02 3.41E-02

9.75 247.65 5813.9646 18.34057 1.23E-01 1.25E+01 5.65E+00 7.46E-02 3.38E-02

10.00 254.00 5426.3669 17.11786 1.30E-01 1.31E+01 5.96E+00 7.40E-02 3.36E-02

10.25 260.35 5038.7693 15.89516 1.36E-01 1.38E+01 6.25E+00 7.35E-02 3.33E-02

10.50 266.70 4651.1717 14.67245 1.42E-01 1.44E+01 6.52E+00 7.30E-02 3.31E-02

10.75 273.05 4263.574 13.44975 1.47E-01 1.49E+01 6.76E+00 7.25E-02 3.29E-02

11.00 279.40 3875.9764 12.22704 1.52E-01 1.54E+01 6.99E+00 7.21E-02 3.27E-02

11.25 285.75 3488.3788 11.00434 1.56E-01 1.59E+01 7.20E+00 7.17E-02 3.25E-02

11.50 292.10 3100.7811 9.781635 1.60E-01 1.63E+01 7.38E+00 7.14E-02 3.24E-02

11.75 298.45 2713.1835 8.558931 1.64E-01 1.66E+01 7.54E+00 7.11E-02 3.23E-02

12.00 304.80 2325.5858 7.336227 1.67E-01 1.69E+01 7.68E+00 7.08E-02 3.21E-02

Results for RBHT Test 1578

Valid Time Period 930 to 1040 seconds
A-139

Figure A-115 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578A for Time Period 930 to 1040 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-140

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-B 

Test Conditions

Date: 6/10/2003

Steady-state time window: 662 – 896 seconds

Inlet flow rate: 2.134 cm/sec (0.840 in./sec) 

Inlet mass flow rate: 0.102 kg/sec (0.225 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-141

Figure A-116: Inlet Flow Plot for Experiment 1578B 

Figure A-117 Inlet Temperature Plot for Experiment 1578B 
A-142

Figure A-118 System Pressure Plot for Experiment 1578B 

Figure A-119 Bundle Power Plot for Experiment 1578B 
A-143

Table A-47: Data Results for RBHT Test 1578 for Time Period 662 to 896 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.663 19.262 922.272 0.610 29.207 0.181 8.666 0.000 0.000 18.47 884.348 2898.47 138779.4885 0.677 0.674 0.680

* 120-133 3048-3378 383 0.667 22.461 1075.446 0.664 31.792 0.324 15.513 -0.947 -45.335 22.42 1073.475 2920.89 139852.9639 0.668 0.665 0.671

* 108-120 2743-3048 382 0.568 26.896 1287.800 0.536 25.664 0.404 19.344 4.166 199.481 21.79 1043.311 2942.68 140896.2747 0.65 0.647 0.653

100-108 2540-2743 381 0.627 15.497 741.995 0.306 14.651 0.296 14.173 0.000 0.000 14.89 712.937 2957.57 141609.2117 0.641 0.638 0.644

97-100 2464-2540 380 0.468 8.283 396.609 0.103 4.932 0.107 5.123 0.000 0.000 8.073 386.537 2965.643 141995.749 0.482 0.480 0.484

93-97 2362-2464 379 0.479 10.828 518.452 0.128 6.129 0.139 6.655 0.000 0.000 10.56 505.616 2976.203 142501.3645 0.492 0.490 0.494

* 85-93 2159-2362 378 0.366 26.356 1261.939 0.222 10.629 0.268 12.832 4.616 221.022 21.25 1017.455 2997.453 143518.82 0.488 0.486 0.490

81-85 2057-2159 377 0.474 10.922 522.928 0.094 4.501 0.128 6.129 0.000 0.000 10.7 512.319 3008.153 144031.1387 0.485 0.483 0.48778-81 1981-2057 376 0.335 10.366 496.321 0.063 3.016 0.094 4.501 0.000 0.000 10.21 488.857 3018.363 144519.9962 0.345 0.343 0.34775-78 1905-1981 375 0.283 11.166 534.615 0.056 2.681 0.092 4.405 0.000 0.000 11.02 527.640 3029.383 145047.6366 0.293 0.292 0.29472-75 1829-1905 374 0.207 12.350 591.309 0.049 2.346 0.089 4.261 0.000 0.000 12.21 584.618 3041.593 145632.2545 0.216 0.215 0.217

* 67-72 1702-1829 373 0.092 23.578 1128.907 0.064 3.064 0.144 6.895 0.820 39.248 22.55 1079.700 3064.143 146711.9543 0.131 0.130 0.132

63-67 1600-1702 372 0.039 19.963 955.841 0.034 1.628 0.111 5.315 0.000 0.000 19.81 948.508 3083.953 147660.4622 0.046 0.044 0.04860-63 1524-1600 371 0.013 15.372 736.028 0.012 0.575 0.081 3.878 0.000 0.000 15.27 731.132 3099.223 148391.5937 0.019 0.018 0.02057-60 1448-1524 370 0.051 14.780 707.681 0.002 0.096 0.005 0.239 0.000 0.000 14.77 707.191 3113.993 149098.7851 0.052 0.049 0.05553-57 1346-1448 369 0.037 20.010 958.079 0.001 0.048 0.000 0.000 0.000 0.000 20 957.605 3133.993 150056.3903 0.037 0.035 0.039

* 46-53 1168-1346 368 0.035 35.086 1679.933 0.002 0.096 0.000 0.000 -0.146 -6.984 35.23 1686.821 3169.223 151743.2117 0.031 0.029 0.033

43-46 1092-1168 367 0.024 15.201 727.822 0.001 0.048 0.000 0.000 0.000 0.000 15.2 727.780 3184.423 152470.9916 0.024 0.023 0.02537-43 940-1092 366 0.027 30.319 1451.665 0.001 0.048 0.000 0.000 0.000 0.000 30.31 1451.251 3214.733 153922.2422 0.027 0.026 0.028

* 25-37 635-940 365 0.020 61.094 2925.212 0.003 0.144 0.000 0.000 0.231 11.076 60.86 2913.992 3275.593 156836.2347 0.023 0.022 0.024

13-25 330-635 364 0.019 61.125 2926.704 0.003 0.144 0.000 0.000 0.000 0.000 61.11 2925.963 3336.703 159762.1972 0.019 0.018 0.020

* 0-13 0-330 363 0.009 66.911 3203.709 0.003 0.144 0.000 0.000 0.068 3.249 66.84 3200.316 3403.543 162962.5136 0.01 0.010 0.011

Results for RBHT Test 1578

Valid Time Period 662 to 896 seconds

Collapsed Liquid Level = 102.921 inches = 2614.20 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-47 Data Results for RBHT Test 1578

B for Time Period 662 to 896 seconds
A-144

Table A-48 Energy Balance Results for RBHT Test 1578B for Time Period 662 to 896 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2325.8095 7.336932 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

0.25 6.35 2455.0212 7.744539 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

0.50 12.70 2584.2328 8.152147 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

0.75 19.05 2713.4444 8.559754 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

1.00 25.40 2842.6561 8.967361 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

1.25 31.75 2971.8677 9.374969 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

1.50 38.10 3101.0794 9.782576 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

1.75 44.45 3230.291 10.19018 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

2.00 50.80 3359.5026 10.59779 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

2.25 57.15 3488.7143 11.0054 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

2.50 63.50 3617.9259 11.41301 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

2.75 69.85 3747.1375 11.82061 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

3.00 76.20 3876.3492 12.22822 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

3.25 82.55 4005.5608 12.63583 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

3.50 88.90 4134.7725 13.04343 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

3.75 95.25 4263.9841 13.45104 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

4.00 101.60 4393.1957 13.85865 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

4.25 107.95 4522.4074 14.26626 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

4.50 114.30 4651.619 14.67386 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

4.75 120.65 4780.8307 15.08147 0.00E+00 0.00E+00 0.00E+00 7.22E-02 3.27E-02

5.00 127.00 4910.0423 15.48908 4.38E-04 3.77E-02 1.71E-02 7.21E-02 3.27E-02

5.25 133.35 5039.2539 15.89669 7.50E-03 6.45E-01 2.93E-01 7.16E-02 3.25E-02

5.50 139.70 5168.4656 16.30429 1.47E-02 1.27E+00 5.76E-01 7.11E-02 3.22E-02

5.75 146.05 5297.6772 16.7119 2.22E-02 1.91E+00 8.66E-01 7.06E-02 3.20E-02

6.00 152.40 5426.8889 17.11951 2.98E-02 2.56E+00 1.16E+00 7.00E-02 3.18E-02

6.25 158.75 5556.1005 17.52712 3.76E-02 3.23E+00 1.47E+00 6.94E-02 3.15E-02

6.50 165.10 5685.3121 17.93472 4.55E-02 3.92E+00 1.78E+00 6.89E-02 3.12E-02

6.75 171.45 5814.5238 18.34233 5.37E-02 4.62E+00 2.10E+00 6.83E-02 3.10E-02

7.00 177.80 5943.7354 18.74994 6.21E-02 5.34E+00 2.42E+00 6.77E-02 3.07E-02

7.25 184.15 6072.9471 19.15754 7.06E-02 6.08E+00 2.76E+00 6.71E-02 3.04E-02

7.50 190.50 6202.1587 19.56515 7.93E-02 6.83E+00 3.10E+00 6.64E-02 3.01E-02

7.75 196.85 6331.3703 19.97276 8.82E-02 7.59E+00 3.44E+00 6.58E-02 2.98E-02

8.00 203.20 6460.582 20.38037 9.73E-02 8.37E+00 3.80E+00 6.51E-02 2.95E-02

8.25 209.55 6589.7936 20.78797 1.07E-01 9.17E+00 4.16E+00 6.45E-02 2.92E-02

8.50 215.90 6719.0053 21.19558 1.16E-01 9.99E+00 4.53E+00 6.38E-02 2.89E-02

8.75 222.25 6848.2169 21.60319 1.26E-01 1.08E+01 4.90E+00 6.31E-02 2.86E-02

9.00 228.60 6977.4285 22.0108 1.35E-01 1.17E+01 5.29E+00 6.24E-02 2.83E-02

9.25 234.95 6589.7936 20.78797 1.45E-01 1.25E+01 5.66E+00 6.17E-02 2.80E-02

9.50 241.30 6202.1587 19.56515 1.54E-01 1.33E+01 6.02E+00 6.10E-02 2.77E-02

9.75 247.65 5814.5238 18.34233 1.63E-01 1.40E+01 6.35E+00 6.04E-02 2.74E-02

10.00 254.00 5426.8889 17.11951 1.71E-01 1.47E+01 6.66E+00 5.98E-02 2.71E-02

10.25 260.35 5039.2539 15.89669 1.78E-01 1.53E+01 6.95E+00 5.93E-02 2.69E-02

10.50 266.70 4651.619 14.67386 1.85E-01 1.59E+01 7.22E+00 5.88E-02 2.67E-02

10.75 273.05 4263.9841 13.45104 1.91E-01 1.65E+01 7.47E+00 5.84E-02 2.65E-02

11.00 279.40 3876.3492 12.22822 1.97E-01 1.70E+01 7.69E+00 5.79E-02 2.63E-02

11.25 285.75 3488.7143 11.0054 2.02E-01 1.74E+01 7.90E+00 5.76E-02 2.61E-02

11.50 292.10 3101.0794 9.782576 2.07E-01 1.78E+01 8.08E+00 5.72E-02 2.60E-02

11.75 298.45 2713.4444 8.559754 2.11E-01 1.82E+01 8.24E+00 5.69E-02 2.58E-02

12.00 304.80 2325.8095 7.336932 2.15E-01 1.85E+01 8.38E+00 5.67E-02 2.57E-02

Results for RBHT Test 1578

Valid Time Period 662 to 896 seconds
A-145

Figure A-120 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578B for Time Period 662 to 896 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-146

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-C 

Test Conditions

Date: 6/10/2003

Steady-state time window: 1106 – 1178 seconds

Inlet flow rate: 3.056 cm/sec (1.203 in./sec) 

Inlet mass flow rate: 0.146 kg/sec (0.322 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-147

Figure A-121 Inlet Flow Plot for Experiment 1578C 

Figure A-122 Inlet Temperature Plot for Experiment 1578C 
A-148

Figure A-123 System Pressure Plot for Experiment 1578C 

Figure A-124 Bundle Power Plot for Experiment 1578C 
A-149

Table A-49: Data Results for RBHT Test 1578 for Time Period 1106 to 1178 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.634 20.914 1001.346 0.776 37.155 0.260 12.449 0.000 0.000 19.87 951.381 2899.87 138846.5209 0.652 0.649 0.655

* 120-133 3048-3378 383 0.644 24.056 1151.784 0.830 39.741 0.463 22.169 -1.707 -81.755 24.47 1171.630 2924.34 140018.1508 0.638 0.635 0.641

* 108-120 2743-3048 382 0.531 29.254 1400.690 0.645 30.883 0.578 27.675 3.641 174.333 24.39 1167.799 2948.73 141185.9502 0.609 0.606 0.612

100-108 2540-2743 381 0.576 17.637 844.442 0.346 16.567 0.423 20.253 0.000 0.000 16.86 807.261 2965.59 141993.2114 0.594 0.591 0.597

97-100 2464-2540 380 0.428 8.907 426.448 0.110 5.267 0.153 7.326 0.000 0.000 8.641 413.733 2974.231 142406.9447 0.445 0.443 0.447

93-97 2362-2464 379 0.423 11.991 574.151 0.129 6.177 0.200 9.576 0.000 0.000 11.66 558.284 2985.891 142965.2285 0.439 0.437 0.441

* 85-93 2159-2362 378 0.308 28.745 1376.322 0.195 9.337 0.383 18.338 2.297 109.985 25.87 1238.662 3011.761 144203.8907 0.377 0.375 0.379

81-85 2057-2159 377 0.304 14.458 692.264 0.060 2.873 0.183 8.762 0.000 0.000 14.21 680.378 3025.971 144884.2692 0.316 0.314 0.318

78-81 1981-2057 376 0.168 12.963 620.650 0.024 1.149 0.134 6.416 0.000 0.000 12.8 612.867 3038.771 145497.1364 0.178 0.177 0.179

75-78 1905-1981 375 0.131 13.544 648.500 0.008 0.383 0.030 1.436 0.000 0.000 13.5 646.383 3052.271 146143.5199 0.133 0.132 0.134

72-75 1829-1905 374 0.087 14.225 681.074 0.001 0.048 0.000 0.000 0.000 0.000 14.22 680.857 3066.491 146824.3772 0.087 0.083 0.091

* 67-72 1702-1829 373 0.036 25.042 1199.029 0.002 0.096 0.000 0.000 0.630 30.176 24.41 1168.757 3090.901 147993.1342 0.059 0.056 0.062

63-67 1600-1702 372 0.032 20.109 962.804 0.002 0.096 0.000 0.000 0.000 0.000 20.1 962.393 3111.001 148955.5274 0.032 0.030 0.034

60-63 1524-1600 371 0.009 15.440 739.260 0.001 0.048 0.000 0.000 0.000 0.000 15.43 738.792 3126.431 149694.3198 0.009 0.009 0.009

57-60 1448-1524 370 0.047 14.853 711.162 0.001 0.048 0.000 0.000 0.000 0.000 14.85 711.022 3141.281 150405.3416 0.047 0.045 0.049

53-57 1346-1448 369 0.033 20.093 962.058 0.002 0.096 0.000 0.000 0.000 0.000 20.09 961.914 3161.371 151367.256 0.033 0.031 0.035

* 46-53 1168-1346 368 0.031 35.211 1685.901 0.003 0.144 0.000 0.000 -0.172 -8.246 35.38 1694.003 3196.751 153061.2594 0.026 0.025 0.027

43-46 1092-1168 367 0.020 15.268 731.054 0.001 0.048 0.000 0.000 0.000 0.000 15.26 730.653 3212.011 153791.9122 0.02 0.019 0.021

37-43 940-1092 366 0.024 30.407 1455.892 0.003 0.144 0.000 0.000 0.000 0.000 30.4 1455.560 3242.411 155247.472 0.024 0.023 0.025

* 25-37 635-940 365 0.016 61.302 2935.159 0.006 0.287 0.000 0.000 0.296 14.176 61 2920.696 3303.411 158168.1677 0.021 0.020 0.022

13-25 330-635 364 0.018 61.229 2931.678 0.006 0.287 0.000 0.000 0.000 0.000 61.21 2930.751 3364.621 161098.9182 0.018 0.017 0.019

* 0-13 0-330 363 0.008 66.978 3206.942 0.006 0.287 0.000 0.000 0.072 3.465 66.9 3203.189 3431.521 164302.1074 0.009 0.009 0.009

Results for RBHT Test 1578

Valid Time Period 1106 to 1178 seconds

Collapsed Liquid Level = 110.594 inches = 2809.09 mm

 (Zosv) Onset of Significant Void = 69.5 inches = 1765.5 mm

Table A-49 Data Results for RBHT Test 1578

C for Time Period 1106 to 1178 seconds
A-150

Table A-50 Energy Balance Results for RBHT Test 1578C for Time Period 1106 to 1178 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2325.2847 7.335277 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

0.25 6.35 2454.4672 7.742792 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

0.50 12.70 2583.6497 8.150307 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

0.75 19.05 2712.8322 8.557823 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

1.00 25.40 2842.0147 8.965338 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

1.25 31.75 2971.1971 9.372853 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

1.50 38.10 3100.3796 9.780369 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

1.75 44.45 3229.5621 10.18788 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

2.00 50.80 3358.7446 10.5954 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

2.25 57.15 3487.9271 11.00291 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

2.50 63.50 3617.1096 11.41043 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

2.75 69.85 3746.292 11.81795 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

3.00 76.20 3875.4745 12.22546 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

3.25 82.55 4004.657 12.63298 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

3.50 88.90 4133.8395 13.04049 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

3.75 95.25 4263.022 13.44801 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

4.00 101.60 4392.2045 13.85552 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

4.25 107.95 4521.3869 14.26304 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

4.50 114.30 4650.5694 14.67055 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

4.75 120.65 4779.7519 15.07807 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

5.00 127.00 4908.9344 15.48558 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

5.25 133.35 5038.1169 15.8931 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

5.50 139.70 5167.2994 16.30061 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

5.75 146.05 5296.4819 16.70813 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

6.00 152.40 5425.6643 17.11565 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

6.25 158.75 5554.8468 17.52316 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.68E-02

6.50 165.10 5684.0293 17.93068 1.26E-03 1.55E-01 7.04E-02 1.03E-01 4.68E-02

6.75 171.45 5813.2118 18.33819 6.96E-03 8.58E-01 3.89E-01 1.03E-01 4.65E-02

7.00 177.80 5942.3943 18.74571 1.28E-02 1.58E+00 7.15E-01 1.02E-01 4.62E-02

7.25 184.15 6071.5768 19.15322 1.87E-02 2.31E+00 1.05E+00 1.01E-01 4.60E-02

7.50 190.50 6200.7592 19.56074 2.48E-02 3.06E+00 1.39E+00 1.01E-01 4.57E-02

7.75 196.85 6329.9417 19.96825 3.10E-02 3.83E+00 1.74E+00 1.00E-01 4.54E-02

8.00 203.20 6459.1242 20.37577 3.74E-02 4.61E+00 2.09E+00 9.94E-02 4.51E-02

8.25 209.55 6588.3067 20.78328 4.38E-02 5.40E+00 2.45E+00 9.88E-02 4.48E-02

8.50 215.90 6717.4892 21.1908 5.04E-02 6.22E+00 2.82E+00 9.81E-02 4.45E-02

8.75 222.25 6846.6717 21.59831 5.72E-02 7.04E+00 3.20E+00 9.74E-02 4.42E-02

9.00 228.60 6975.8542 22.00583 6.40E-02 7.89E+00 3.58E+00 9.67E-02 4.39E-02

9.25 234.95 6588.3067 20.78328 7.07E-02 8.72E+00 3.95E+00 9.60E-02 4.35E-02

9.50 241.30 6200.7592 19.56074 7.71E-02 9.50E+00 4.31E+00 9.53E-02 4.32E-02

9.75 247.65 5813.2118 18.33819 8.30E-02 1.02E+01 4.64E+00 9.47E-02 4.30E-02

10.00 254.00 5425.6643 17.11565 8.86E-02 1.09E+01 4.95E+00 9.41E-02 4.27E-02

10.25 260.35 5038.1169 15.8931 9.38E-02 1.16E+01 5.24E+00 9.36E-02 4.25E-02

10.50 266.70 4650.5694 14.67055 9.86E-02 1.21E+01 5.51E+00 9.31E-02 4.22E-02

10.75 273.05 4263.022 13.44801 1.03E-01 1.27E+01 5.76E+00 9.26E-02 4.20E-02

11.00 279.40 3875.4745 12.22546 1.07E-01 1.32E+01 5.98E+00 9.22E-02 4.18E-02

11.25 285.75 3487.9271 11.00291 1.11E-01 1.36E+01 6.19E+00 9.19E-02 4.17E-02

11.50 292.10 3100.3796 9.780369 1.14E-01 1.40E+01 6.37E+00 9.15E-02 4.15E-02

11.75 298.45 2712.8322 8.557823 1.17E-01 1.44E+01 6.53E+00 9.12E-02 4.14E-02

12.00 304.80 2325.2847 7.335277 1.19E-01 1.47E+01 6.67E+00 9.10E-02 4.13E-02

Results for RBHT Test 1578

Valid Time Period 1106 to 1178 seconds
A-151

Figure A-125 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578C for Time Period 1106 to 1178 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-152

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-D 

Test Conditions

Date: 6/10/2003

Steady-state time window: 1350 – 1470 seconds

Inlet flow rate: 1.521 cm/sec (0.599 in./sec) 

Inlet mass flow rate: 0.073 kg/sec (0.160 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-153

Figure A-126 Inlet Flow Plot for Experiment 1578D 

Figure A-127 Inlet Temperature Plot for Experiment 1578D 
A-154

Figure A-128 System Pressure Plot for Experiment 1578D 

Figure A-129 Bundle Power Plot for Experiment 1578D 
A-155

Table A-51: Data Results for RBHT Test 1578 for Time Period 1350 to 1470 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.728 15.549 744.482 0.466 22.312 0.129 6.177 0.000 0.000 14.95 715.810 2894.95 138610.95 0.738 0.734 0.742

* 120-133 3048-3378 383 0.713 19.407 929.235 0.511 24.467 0.231 11.060 0.265 12.711 18.4 880.997 2913.35 139491.9467 0.727 0.723 0.731

* 108-120 2743-3048 382 0.614 24.035 1150.789 0.417 19.966 0.288 13.790 4.980 238.431 18.35 878.603 2931.7 140370.5494 0.705 0.701 0.709

100-108 2540-2743 381 0.684 13.144 629.353 0.243 11.635 0.211 10.103 0.000 0.000 12.69 607.600 2944.39 140978.1499 0.695 0.692 0.698

97-100 2464-2540 380 0.546 7.068 338.424 0.083 3.974 0.076 3.639 0.000 0.000 6.906 330.661 2951.296 141308.811 0.557 0.554 0.560

93-97 2362-2464 379 0.547 9.416 450.817 0.105 5.027 0.099 4.740 0.000 0.000 9.208 440.881 2960.504 141749.6924 0.557 0.554 0.560

* 85-93 2159-2362 378 0.408 24.590 1177.396 0.188 9.001 0.191 9.145 6.361 304.586 17.85 854.663 2978.354 142604.355 0.57 0.567 0.573

81-85 2057-2159 377 0.576 8.818 422.221 0.083 3.974 0.091 4.357 0.000 0.000 8.642 413.781 2986.996 143018.1361 0.584 0.581 0.587

78-81 1981-2057 376 0.395 9.431 451.563 0.058 2.777 0.067 3.208 0.000 0.000 9.301 445.334 2996.297 143463.4704 0.403 0.401 0.405

75-78 1905-1981 375 0.385 9.577 458.525 0.054 2.586 0.065 3.112 0.000 0.000 9.455 452.708 3005.752 143916.1782 0.393 0.391 0.395

72-75 1829-1905 374 0.323 10.542 504.776 0.050 2.394 0.064 3.064 0.000 0.000 10.42 498.912 3016.172 144415.0905 0.331 0.329 0.333

* 67-72 1702-1829 373 0.276 18.805 900.391 0.074 3.543 0.103 4.932 1.088 52.096 17.54 839.820 3033.712 145254.9102 0.324 0.322 0.326

63-67 1600-1702 372 0.312 14.297 684.555 0.050 2.394 0.079 3.783 0.000 0.000 14.16 677.984 3047.872 145932.8947 0.318 0.316 0.320

60-63 1524-1600 371 0.207 12.350 591.309 0.033 1.580 0.058 2.777 0.000 0.000 12.25 586.533 3060.122 146519.4278 0.213 0.212 0.214

57-60 1448-1524 370 0.181 12.760 610.953 0.028 1.341 0.056 2.681 0.000 0.000 12.67 606.643 3072.792 147126.0707 0.187 0.186 0.188

53-57 1346-1448 369 0.101 18.686 894.671 0.030 1.436 0.073 3.495 0.000 0.000 18.58 889.615 3091.372 148015.6858 0.105 0.104 0.106

* 46-53 1168-1346 368 0.045 34.712 1662.030 0.028 1.341 0.121 5.794 0.743 35.585 33.82 1619.310 3125.192 149634.9961 0.069 0.066 0.072

43-46 1092-1168 367 0.033 15.061 721.108 0.001 0.048 0.001 0.048 0.000 0.000 15.05 720.598 3140.242 150355.594 0.033 0.031 0.035

37-43 940-1092 366 0.034 30.116 1441.968 0.001 0.048 0.000 0.000 0.000 0.000 30.11 1441.675 3170.352 151797.2685 0.034 0.032 0.036

* 25-37 635-940 365 0.026 60.700 2906.314 0.001 0.048 0.000 0.000 0.139 6.638 60.56 2899.628 3230.912 154696.8969 0.028 0.027 0.029

13-25 330-635 364 0.022 60.933 2917.504 0.001 0.048 0.000 0.000 0.000 0.000 60.91 2916.386 3291.822 157613.2834 0.022 0.021 0.023

* 0-13 0-330 363 0.010 66.828 3199.731 0.002 0.096 0.000 0.000 0.086 4.107 66.74 3195.528 3358.562 160808.8117 0.011 0.010 0.012

Results for RBHT Test 1578

Valid Time Period 1350 to 1470 seconds

Collapsed Liquid Level = 91.785 inches = 2331.35 mm

 (Zosv) Onset of Significant Void = 53.5 inches = 1257 mm

Table A-51 Data Results for RBHT Test 1578

D for Time Period 1350 to 1470 seconds
A-156

Table A-52 Energy Balance Results for RBHT Test 1578D for Time Period 1350 to 1470 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2327.4503 7.342108 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

0.25 6.35 2456.7531 7.750003 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

0.50 12.70 2586.0559 8.157898 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

0.75 19.05 2715.3587 8.565793 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

1.00 25.40 2844.6615 8.973688 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

1.25 31.75 2973.9643 9.381583 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

1.50 38.10 3103.2671 9.789478 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

1.75 44.45 3232.5699 10.19737 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

2.00 50.80 3361.8727 10.60527 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

2.25 57.15 3491.1755 11.01316 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

2.50 63.50 3620.4783 11.42106 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

2.75 69.85 3749.7811 11.82895 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

3.00 76.20 3879.0839 12.23685 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

3.25 82.55 4008.3867 12.64474 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

3.50 88.90 4137.6895 13.05264 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

3.75 95.25 4266.9923 13.46053 0.00E+00 0.00E+00 0.00E+00 5.15E-02 2.33E-02

4.00 101.60 4396.2951 13.86843 5.87E-03 3.60E-01 1.63E-01 5.12E-02 2.32E-02

4.25 107.95 4525.5979 14.27632 1.47E-02 9.05E-01 4.10E-01 5.07E-02 2.30E-02

4.50 114.30 4654.9007 14.68422 2.39E-02 1.47E+00 6.65E-01 5.02E-02 2.28E-02

4.75 120.65 4784.2035 15.09211 3.33E-02 2.04E+00 9.26E-01 4.98E-02 2.26E-02

5.00 127.00 4913.5063 15.50001 4.29E-02 2.63E+00 1.19E+00 4.93E-02 2.23E-02

5.25 133.35 5042.8091 15.9079 5.28E-02 3.24E+00 1.47E+00 4.87E-02 2.21E-02

5.50 139.70 5172.1119 16.3158 6.30E-02 3.87E+00 1.75E+00 4.82E-02 2.19E-02

5.75 146.05 5301.4147 16.72369 7.34E-02 4.51E+00 2.04E+00 4.77E-02 2.16E-02

6.00 152.40 5430.7175 17.13159 8.41E-02 5.16E+00 2.34E+00 4.71E-02 2.14E-02

6.25 158.75 5560.0203 17.53948 9.50E-02 5.83E+00 2.65E+00 4.66E-02 2.11E-02

6.50 165.10 5689.3231 17.94738 1.06E-01 6.52E+00 2.96E+00 4.60E-02 2.09E-02

6.75 171.45 5818.6258 18.35527 1.18E-01 7.22E+00 3.27E+00 4.54E-02 2.06E-02

7.00 177.80 5947.9286 18.76317 1.29E-01 7.94E+00 3.60E+00 4.48E-02 2.03E-02

7.25 184.15 6077.2314 19.17106 1.41E-01 8.67E+00 3.93E+00 4.42E-02 2.00E-02

7.50 190.50 6206.5342 19.57896 1.54E-01 9.42E+00 4.27E+00 4.36E-02 1.98E-02

7.75 196.85 6335.837 19.98685 1.66E-01 1.02E+01 4.62E+00 4.29E-02 1.95E-02

8.00 203.20 6465.1398 20.39475 1.79E-01 1.10E+01 4.98E+00 4.23E-02 1.92E-02

8.25 209.55 6594.4426 20.80264 1.92E-01 1.18E+01 5.34E+00 4.16E-02 1.89E-02

8.50 215.90 6723.7454 21.21053 2.05E-01 1.26E+01 5.71E+00 4.09E-02 1.86E-02

8.75 222.25 6853.0482 21.61843 2.19E-01 1.34E+01 6.08E+00 4.02E-02 1.82E-02

9.00 228.60 6982.351 22.02632 2.32E-01 1.43E+01 6.47E+00 3.95E-02 1.79E-02

9.25 234.95 6594.4426 20.80264 2.46E-01 1.51E+01 6.84E+00 3.88E-02 1.76E-02

9.50 241.30 6206.5342 19.57896 2.59E-01 1.59E+01 7.20E+00 3.82E-02 1.73E-02

9.75 247.65 5818.6258 18.35527 2.71E-01 1.66E+01 7.53E+00 3.75E-02 1.70E-02

10.00 254.00 5430.7175 17.13159 2.82E-01 1.73E+01 7.84E+00 3.70E-02 1.68E-02

10.25 260.35 5042.8091 15.9079 2.92E-01 1.79E+01 8.13E+00 3.64E-02 1.65E-02

10.50 266.70 4654.9007 14.68422 3.02E-01 1.85E+01 8.40E+00 3.59E-02 1.63E-02

10.75 273.05 4266.9923 13.46053 3.11E-01 1.91E+01 8.65E+00 3.55E-02 1.61E-02

11.00 279.40 3879.0839 12.23685 3.19E-01 1.96E+01 8.87E+00 3.51E-02 1.59E-02

11.25 285.75 3491.1755 11.01316 3.26E-01 2.00E+01 9.08E+00 3.47E-02 1.57E-02

11.50 292.10 3103.2671 9.789478 3.33E-01 2.04E+01 9.26E+00 3.43E-02 1.56E-02

11.75 298.45 2715.3587 8.565793 3.38E-01 2.08E+01 9.42E+00 3.40E-02 1.54E-02

12.00 304.80 2327.4503 7.342108 3.43E-01 2.11E+01 9.56E+00 3.38E-02 1.53E-02

Results for RBHT Test 1578

Valid Time Period 1350 to 1470 seconds
A-157

Figure A-130 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578D for Time Period 1350 to 1470 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-158

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-E 

Test Conditions

Date: 6/10/2003

Steady-state time window: 1854 – 1962 seconds

Inlet flow rate: 1.019 cm/sec (0.401 in./sec) 

Inlet mass flow rate: 0.049 kg/sec (0.107 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-159

Figure A-131 Inlet Flow Plot for Experiment 1578E 

Figure A-132 Inlet Temperature Plot for Experiment 1578E 
A-160

Figure A-133 System Pressure Plot for Experiment 1578E 

Figure A-134 Bundle Power Plot for Experiment 1578E 
A-161

Table A-53: Data Results for RBHT Test 1578 for Time Period 1854 to 1962 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.813 10.698 512.235 0.331 15.848 0.087 4.166 0.000 0.000 10.28 492.209 2890.28 138387.3492 0.82 0.816 0.824

* 120-133 3048-3378 383 0.779 14.926 714.643 0.363 17.381 0.155 7.421 1.298 62.131 13.11 627.710 2903.39 139015.0594 0.806 0.802 0.810

* 108-120 2743-3048 382 0.689 19.361 926.997 0.298 14.268 0.193 9.241 4.980 238.431 13.89 665.057 2917.28 139680.1161 0.777 0.773 0.781

100-108 2540-2743 381 0.755 10.174 487.121 0.175 8.379 0.141 6.751 0.000 0.000 9.855 471.860 2927.135 140151.9761 0.763 0.759 0.767

97-100 2464-2540 380 0.667 5.183 248.161 0.060 2.873 0.051 2.442 0.000 0.000 5.07 242.753 2932.205 140394.729 0.675 0.672 0.678

93-97 2362-2464 379 0.663 7.011 335.688 0.076 3.639 0.067 3.208 0.000 0.000 6.863 328.602 2939.068 140723.3312 0.67 0.667 0.673

* 85-93 2159-2362 378 0.482 21.521 1030.439 0.138 6.607 0.128 6.129 8.485 406.272 12.77 611.431 2951.838 141334.7621 0.693 0.690 0.696

81-85 2057-2159 377 0.710 6.029 288.692 0.062 2.969 0.061 2.921 0.000 0.000 5.904 282.685 2957.742 141617.4471 0.716 0.712 0.720

78-81 1981-2057 376 0.527 7.369 352.846 0.044 2.107 0.045 2.155 0.000 0.000 7.278 348.473 2965.02 141965.9196 0.533 0.530 0.536

75-78 1905-1981 375 0.550 7.016 335.937 0.041 1.963 0.044 2.107 0.000 0.000 6.929 331.762 2971.949 142297.6819 0.555 0.552 0.558

72-75 1829-1905 374 0.502 7.764 371.744 0.039 1.867 0.043 2.059 0.000 0.000 7.677 367.577 2979.626 142665.2586 0.507 0.504 0.510

* 67-72 1702-1829 373 0.400 15.570 745.477 0.059 2.825 0.069 3.304 3.742 179.149 11.7 560.199 2991.326 143225.4577 0.549 0.546 0.552

63-67 1600-1702 372 0.587 8.590 411.280 0.043 2.059 0.053 2.538 0.000 0.000 8.489 406.456 2999.815 143631.9132 0.591 0.588 0.594

60-63 1524-1600 371 0.418 9.068 434.157 0.029 1.389 0.039 1.867 0.000 0.000 8.994 430.635 3008.809 144062.5482 0.423 0.421 0.425

57-60 1448-1524 370 0.394 9.447 452.309 0.027 1.293 0.038 1.819 0.000 0.000 9.379 449.069 3018.188 144511.6171 0.398 0.396 0.400

53-57 1346-1448 369 0.355 13.399 641.538 0.032 1.532 0.049 2.346 0.000 0.000 13.32 637.765 3031.508 145149.3821 0.359 0.357 0.361

* 46-53 1168-1346 368 0.232 27.930 1337.283 0.045 2.155 0.081 3.878 2.944 140.946 24.86 1190.303 3056.368 146339.6853 0.316 0.314 0.318

43-46 1092-1168 367 0.270 11.373 544.561 0.015 0.718 0.033 1.580 0.000 0.000 11.32 542.005 3067.688 146881.6898 0.273 0.272 0.274

37-43 940-1092 366 0.118 27.483 1315.898 0.021 1.005 0.063 3.016 0.000 0.000 27.39 1311.440 3095.078 148193.1301 0.121 0.120 0.122

* 25-37 635-940 365 0.037 60.045 2874.984 0.018 0.862 0.037 1.772 2.310 110.617 57.68 2761.733 3152.758 150954.8633 0.074 0.070 0.078

13-25 330-635 364 0.028 60.596 2901.341 0.001 0.048 0.000 0.000 0.000 0.000 60.57 2900.107 3213.328 153854.9705 0.028 0.027 0.029

* 0-13 0-330 363 0.012 66.708 3194.012 0.001 0.048 0.000 0.000 0.147 7.054 66.56 3186.910 3279.888 157041.8804 0.014 0.013 0.015

Results for RBHT Test 1578

Valid Time Period 1854 to 1962 seconds

Collapsed Liquid Level = 81.123 inches = 2060.51 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-53 Data Results for RBHT Test 1578

E for Time Period 1854 to 1962 seconds
A-162

Table A-54 Energy Balance Results for RBHT Test 1578E for Time Period 1854 to 1962 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2324.3226 7.332242 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.25 6.35 2453.4517 7.739588 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.50 12.70 2582.5807 8.146935 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.75 19.05 2711.7097 8.554282 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.00 25.40 2840.8388 8.961629 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.25 31.75 2969.9678 9.368975 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.50 38.10 3099.0968 9.776322 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.75 44.45 3228.2259 10.18367 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.00 50.80 3357.3549 10.59102 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.25 57.15 3486.484 10.99836 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.50 63.50 3615.613 11.40571 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.75 69.85 3744.742 11.81306 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

3.00 76.20 3873.8711 12.2204 1.02E-02 4.17E-01 1.89E-01 3.41E-02 1.55E-02

3.25 82.55 4003.0001 12.62775 2.19E-02 8.98E-01 4.08E-01 3.37E-02 1.53E-02

3.50 88.90 4132.1291 13.0351 3.39E-02 1.40E+00 6.33E-01 3.33E-02 1.51E-02

3.75 95.25 4261.2582 13.44244 4.64E-02 1.91E+00 8.65E-01 3.29E-02 1.49E-02

4.00 101.60 4390.3872 13.84979 5.93E-02 2.44E+00 1.11E+00 3.24E-02 1.47E-02

4.25 107.95 4519.5162 14.25714 7.25E-02 2.98E+00 1.35E+00 3.20E-02 1.45E-02

4.50 114.30 4648.6453 14.66448 8.61E-02 3.54E+00 1.61E+00 3.15E-02 1.43E-02

4.75 120.65 4777.7743 15.07183 1.00E-01 4.12E+00 1.87E+00 3.10E-02 1.41E-02

5.00 127.00 4906.9033 15.47918 1.15E-01 4.71E+00 2.14E+00 3.05E-02 1.38E-02

5.25 133.35 5036.0324 15.88652 1.29E-01 5.32E+00 2.41E+00 3.00E-02 1.36E-02

5.50 139.70 5165.1614 16.29387 1.44E-01 5.94E+00 2.69E+00 2.95E-02 1.34E-02

5.75 146.05 5294.2904 16.70122 1.60E-01 6.58E+00 2.98E+00 2.90E-02 1.31E-02

6.00 152.40 5423.4195 17.10856 1.76E-01 7.23E+00 3.28E+00 2.84E-02 1.29E-02

6.25 158.75 5552.5485 17.51591 1.92E-01 7.90E+00 3.58E+00 2.78E-02 1.26E-02

6.50 165.10 5681.6775 17.92326 2.09E-01 8.59E+00 3.89E+00 2.73E-02 1.24E-02

6.75 171.45 5810.8066 18.3306 2.26E-01 9.29E+00 4.21E+00 2.67E-02 1.21E-02

7.00 177.80 5939.9356 18.73795 2.43E-01 1.00E+01 4.54E+00 2.61E-02 1.18E-02

7.25 184.15 6069.0647 19.1453 2.61E-01 1.07E+01 4.87E+00 2.55E-02 1.16E-02

7.50 190.50 6198.1937 19.55264 2.79E-01 1.15E+01 5.21E+00 2.48E-02 1.13E-02

7.75 196.85 6327.3227 19.95999 2.98E-01 1.23E+01 5.56E+00 2.42E-02 1.10E-02

8.00 203.20 6456.4518 20.36734 3.17E-01 1.30E+01 5.91E+00 2.35E-02 1.07E-02

8.25 209.55 6585.5808 20.77468 3.36E-01 1.38E+01 6.27E+00 2.29E-02 1.04E-02

8.50 215.90 6714.7098 21.18203 3.56E-01 1.46E+01 6.64E+00 2.22E-02 1.01E-02

8.75 222.25 6843.8389 21.58938 3.76E-01 1.55E+01 7.02E+00 2.15E-02 9.75E-03

9.00 228.60 6972.9679 21.99672 3.97E-01 1.63E+01 7.40E+00 2.08E-02 9.43E-03

9.25 234.95 6585.5808 20.77468 4.17E-01 1.71E+01 7.78E+00 2.01E-02 9.12E-03

9.50 241.30 6198.1937 19.55264 4.36E-01 1.79E+01 8.13E+00 1.94E-02 8.82E-03

9.75 247.65 5810.8066 18.3306 4.54E-01 1.87E+01 8.46E+00 1.88E-02 8.54E-03

10.00 254.00 5423.4195 17.10856 4.70E-01 1.93E+01 8.77E+00 1.83E-02 8.28E-03

10.25 260.35 5036.0324 15.88652 4.86E-01 2.00E+01 9.06E+00 1.77E-02 8.04E-03

10.50 266.70 4648.6453 14.66448 5.00E-01 2.06E+01 9.33E+00 1.72E-02 7.81E-03

10.75 273.05 4261.2582 13.44244 5.14E-01 2.11E+01 9.58E+00 1.68E-02 7.61E-03

11.00 279.40 3873.8711 12.2204 5.26E-01 2.16E+01 9.81E+00 1.63E-02 7.42E-03

11.25 285.75 3486.484 10.99836 5.37E-01 2.21E+01 1.00E+01 1.60E-02 7.25E-03

11.50 292.10 3099.0968 9.776322 5.46E-01 2.25E+01 1.02E+01 1.56E-02 7.09E-03

11.75 298.45 2711.7097 8.554282 5.55E-01 2.28E+01 1.04E+01 1.53E-02 6.96E-03

12.00 304.80 2324.3226 7.332242 5.63E-01 2.31E+01 1.05E+01 1.51E-02 6.84E-03

Results for RBHT Test 1578

Valid Time Period 1854 to 1962 seconds
A-163

Figure A-135 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578E for Time Period 1854 to 1962 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-164

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-F 

Test Conditions

Date: 6/10/2003

Steady-state time window: 2269 – 2389 seconds

Inlet flow rate: 0.505 cm/sec (0.199 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.053 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-165

Figure A-136 Inlet Flow Plot for Experiment 1578F 

Figure A-137 Inlet Temperature Plot for Experiment 1578F 
A-166

Figure A-138 System Pressure Plot for Experiment 1578F 

Figure A-139 Bundle Power Plot for Experiment 1578F 
A-167

Table A-55: Data Results for RBHT Test 1578 for Time Period 2269 to 2389 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.942 3.293 157.649 0.079 3.783 0.000 0.000 0.000 0.000 3.209 153.648 2883.209 138048.7879 0.944 0.939 0.949

* 120-133 3048-3378 383 0.891 7.380 353.343 0.094 4.501 0.000 0.000 1.684 80.617 5.602 268.225 2888.811 138317.0131 0.917 0.912 0.922

* 108-120 2743-3048 382 0.794 12.853 615.428 0.139 6.655 0.060 2.873 4.144 198.439 8.51 407.461 2897.321 138724.4741 0.863 0.859 0.867

100-108 2540-2743 381 0.833 6.949 332.704 0.091 4.357 0.070 3.352 0.000 0.000 6.786 324.915 2904.107 139049.3895 0.837 0.833 0.841

97-100 2464-2540 380 0.757 3.781 181.023 0.032 1.532 0.025 1.197 0.000 0.000 3.722 178.210 2907.829 139227.5998 0.761 0.757 0.765

93-97 2362-2464 379 0.754 5.110 244.679 0.041 1.963 0.033 1.580 0.000 0.000 5.037 241.173 2912.866 139468.7727 0.757 0.753 0.761

* 85-93 2159-2362 378 0.583 17.341 830.269 0.075 3.591 0.063 3.016 7.143 341.986 10.06 481.675 2922.926 139950.4481 0.758 0.754 0.762

81-85 2057-2159 377 0.755 5.089 243.685 0.034 1.628 0.030 1.436 0.000 0.000 5.023 240.503 2927.949 140190.9506 0.758 0.754 0.762

78-81 1981-2057 376 0.610 6.071 290.681 0.024 1.149 0.022 1.053 0.000 0.000 6.024 288.431 2933.973 140479.3813 0.613 0.610 0.616

75-78 1905-1981 375 0.617 5.972 285.957 0.023 1.101 0.022 1.053 0.000 0.000 5.924 283.643 2939.897 140763.0239 0.62 0.617 0.623

72-75 1829-1905 374 0.590 6.383 305.601 0.021 1.005 0.021 1.005 0.000 0.000 6.335 303.321 2946.232 141066.3453 0.593 0.590 0.596

* 67-72 1702-1829 373 0.458 14.074 673.863 0.033 1.580 0.034 1.628 4.703 225.177 9.304 445.478 2955.536 141511.8233 0.642 0.639 0.645

63-67 1600-1702 372 0.688 6.492 310.822 0.024 1.149 0.026 1.245 0.000 0.000 6.439 308.301 2961.975 141820.1242 0.69 0.687 0.693

60-63 1524-1600 371 0.520 7.473 357.819 0.017 0.814 0.019 0.910 0.000 0.000 7.433 355.894 2969.408 142176.0182 0.523 0.520 0.526

57-60 1448-1524 370 0.494 7.889 377.711 0.016 0.766 0.019 0.910 0.000 0.000 7.85 375.860 2977.258 142551.8782 0.496 0.494 0.498

53-57 1346-1448 369 0.456 11.295 540.831 0.019 0.910 0.024 1.149 0.000 0.000 11.25 538.653 2988.508 143090.5311 0.459 0.457 0.461

* 46-53 1168-1346 368 0.325 24.523 1174.163 0.030 1.436 0.040 1.915 5.733 274.493 18.72 896.318 3007.228 143986.8495 0.485 0.483 0.487

43-46 1092-1168 367 0.510 7.639 365.776 0.011 0.527 0.016 0.766 0.000 0.000 7.611 364.417 3014.839 144351.2661 0.511 0.508 0.514

37-43 940-1092 366 0.432 17.704 847.675 0.019 0.910 0.031 1.484 0.000 0.000 17.65 845.087 3032.489 145196.3527 0.434 0.432 0.436

* 25-37 635-940 365 0.225 48.324 2313.762 0.026 1.245 0.056 2.681 1.532 73.349 46.71 2236.487 3079.199 147432.8395 0.25 0.249 0.251

13-25 330-635 364 0.066 58.181 2785.715 0.010 0.479 0.028 1.341 0.000 0.000 58.13 2783.279 3137.329 150216.1188 0.067 0.064 0.070

* 0-13 0-330 363 0.016 66.417 3180.087 0.000 0.000 0.000 0.000 1.187 56.858 65.23 3123.229 3202.559 153339.348 0.034 0.032 0.036

 (Z2φ) Two-Phase Level (Dryout) = 139.50 inches = 3543.30 mm

 (S) Level Swell = 2.503

Results for RBHT Test 1578

Valid Time Period 2269 to 2389 seconds

Collapsed Liquid Level = 66.684 inches = 1693.78 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-55 Data Results for RBHT Test 1578

F for Time Period 2269 to 2389 seconds
A-168

Table A-56 Energy Balance Results for RBHT Test 1578F for Time Period 2269 to 2389 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2328.6715 7.34596 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

0.25 6.35 2458.0421 7.754069 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

0.50 12.70 2587.4127 8.162178 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

0.75 19.05 2716.7834 8.570287 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

1.00 25.40 2846.154 8.978396 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

1.25 31.75 2975.5246 9.386505 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

1.50 38.10 3104.8953 9.794614 0.00E+00 0.00E+00 0.00E+00 1.71E-02 7.74E-03

1.75 44.45 3234.2659 10.20272 1.75E-02 3.57E-01 1.62E-01 1.68E-02 7.60E-03

2.00 50.80 3363.6366 10.61083 3.73E-02 7.60E-01 3.45E-01 1.64E-02 7.45E-03

2.25 57.15 3493.0072 11.01894 5.79E-02 1.18E+00 5.35E-01 1.61E-02 7.29E-03

2.50 63.50 3622.3778 11.42705 7.93E-02 1.61E+00 7.32E-01 1.57E-02 7.12E-03

2.75 69.85 3751.7485 11.83516 1.01E-01 2.06E+00 9.36E-01 1.53E-02 6.95E-03

3.00 76.20 3881.1191 12.24327 1.24E-01 2.53E+00 1.15E+00 1.49E-02 6.78E-03

3.25 82.55 4010.4897 12.65138 1.48E-01 3.01E+00 1.37E+00 1.45E-02 6.59E-03

3.50 88.90 4139.8604 13.05949 1.72E-01 3.51E+00 1.59E+00 1.41E-02 6.40E-03

3.75 95.25 4269.231 13.46759 1.98E-01 4.02E+00 1.83E+00 1.37E-02 6.21E-03

4.00 101.60 4398.6017 13.8757 2.24E-01 4.55E+00 2.07E+00 1.32E-02 6.01E-03

4.25 107.95 4527.9723 14.28381 2.51E-01 5.10E+00 2.31E+00 1.28E-02 5.80E-03

4.50 114.30 4657.3429 14.69192 2.78E-01 5.66E+00 2.57E+00 1.23E-02 5.59E-03

4.75 120.65 4786.7136 15.10003 3.06E-01 6.24E+00 2.83E+00 1.18E-02 5.37E-03

5.00 127.00 4916.0842 15.50814 3.36E-01 6.83E+00 3.10E+00 1.13E-02 5.14E-03

5.25 133.35 5045.4548 15.91625 3.65E-01 7.44E+00 3.37E+00 1.08E-02 4.91E-03

5.50 139.70 5174.8255 16.32436 3.96E-01 8.06E+00 3.66E+00 1.03E-02 4.67E-03

5.75 146.05 5304.1961 16.73247 4.28E-01 8.70E+00 3.95E+00 9.77E-03 4.43E-03

6.00 152.40 5433.5667 17.14057 4.60E-01 9.36E+00 4.24E+00 9.22E-03 4.18E-03

6.25 158.75 5562.9374 17.54868 4.93E-01 1.00E+01 4.55E+00 8.65E-03 3.93E-03

6.50 165.10 5692.308 17.95679 5.27E-01 1.07E+01 4.86E+00 8.08E-03 3.66E-03

6.75 171.45 5821.6787 18.3649 5.61E-01 1.14E+01 5.18E+00 7.49E-03 3.40E-03

7.00 177.80 5951.0493 18.77301 5.96E-01 1.21E+01 5.51E+00 6.88E-03 3.12E-03

7.25 184.15 6080.4199 19.18112 6.33E-01 1.29E+01 5.84E+00 6.27E-03 2.84E-03

7.50 190.50 6209.7906 19.58923 6.69E-01 1.36E+01 6.18E+00 5.64E-03 2.56E-03

7.75 196.85 6339.1612 19.99734 7.07E-01 1.44E+01 6.53E+00 5.00E-03 2.27E-03

8.00 203.20 6468.5318 20.40545 7.46E-01 1.52E+01 6.88E+00 4.34E-03 1.97E-03

8.25 209.55 6597.9025 20.81355 7.85E-01 1.60E+01 7.25E+00 3.67E-03 1.67E-03

8.50 215.90 6727.2731 21.22166 8.25E-01 1.68E+01 7.62E+00 2.99E-03 1.36E-03

8.75 222.25 6856.6438 21.62977 8.66E-01 1.76E+01 7.99E+00 2.29E-03 1.04E-03

9.00 228.60 6986.0144 22.03788 9.07E-01 1.85E+01 8.38E+00 1.59E-03 7.20E-04

9.25 234.95 6597.9025 20.81355 9.48E-01 1.93E+01 8.75E+00 8.90E-04 4.04E-04

9.50 241.30 6209.7906 19.58923 9.86E-01 2.01E+01 9.11E+00 2.35E-04 1.07E-04

9.75 247.65 5821.6787 18.3649 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

10.00 254.00 5433.5667 17.14057 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

10.25 260.35 5045.4548 15.91625 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

10.50 266.70 4657.3429 14.69192 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

10.75 273.05 4269.231 13.46759 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

11.00 279.40 3881.1191 12.24327 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

11.25 285.75 3493.0072 11.01894 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

11.50 292.10 3104.8953 9.794614 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

11.75 298.45 2716.7834 8.570287 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

12.00 304.80 2328.6715 7.34596 1.00E+00 2.04E+01 9.23E+00 0.00E+00 0.00E+00

Results for RBHT Test 1578

Valid Time Period 2269 to 2389 seconds
A-169

Figure A-140 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578F for Time Period 2269 to 2389 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-170

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-G 

Test Conditions

Date: 6/10/2003

Steady-state time window: 2665 – 2845 seconds

Inlet flow rate: 0.424 cm/sec (0.167 in./sec) 

Inlet mass flow rate: 0.020 kg/sec (0.045 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-171

Figure A-141 Inlet Flow Plot for Experiment 1578G 

Figure A-142 Inlet Temperature Plot for Experiment 1578G 
A-172

Figure A-143 System Pressure Plot for Experiment 1578G 

Figure A-144 Bundle Power Plot for Experiment 1578G 
A-173

Table A-57: Data Results for RBHT Test 1578 for Time Period 2665 to 2845 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 1.002 -0.093 -4.476 0.056 2.681 0.000 0.000 0.000 0.000 -0.149 -7.134 2879.851 137888.006 1.003 0.998 1.008

* 120-133 3048-3378 383 0.971 1.984 94.987 0.066 3.160 0.000 0.000 1.518 72.675 0.4 19.152 2880.251 137907.1581 0.994 0.989 0.999

* 108-120 2743-3048 382 0.937 3.921 187.737 0.061 2.921 0.000 0.000 2.429 116.299 1.431 68.517 2881.682 137975.6748 0.977 0.972 0.982

100-108 2540-2743 381 0.967 1.387 66.392 0.063 3.016 0.015 0.718 0.000 0.000 1.308 62.627 2882.99 138038.3021 0.969 0.964 0.974

97-100 2464-2540 380 0.924 1.179 56.445 0.025 1.197 0.021 1.005 0.000 0.000 1.131 54.153 2884.121 138092.4547 0.927 0.922 0.932

93-97 2362-2464 379 0.882 2.462 117.864 0.033 1.580 0.028 1.341 0.000 0.000 2.401 114.960 2886.522 138207.4152 0.884 0.880 0.888

* 85-93 2159-2362 378 0.710 12.033 576.141 0.063 3.016 0.053 2.538 5.905 282.730 6.012 287.856 2892.534 138495.2713 0.855 0.851 0.859

81-85 2057-2159 377 0.824 3.666 175.553 0.029 1.389 0.026 1.245 0.000 0.000 3.611 172.896 2896.145 138668.1669 0.826 0.822 0.830

78-81 1981-2057 376 0.680 4.991 238.960 0.020 0.958 0.019 0.910 0.000 0.000 4.951 237.055 2901.096 138905.2221 0.682 0.679 0.685

75-78 1905-1981 375 0.678 5.012 239.955 0.019 0.910 0.018 0.862 0.000 0.000 4.973 238.109 2906.069 139143.3306 0.681 0.678 0.684

72-75 1829-1905 374 0.654 5.385 257.858 0.018 0.862 0.018 0.862 0.000 0.000 5.347 256.016 2911.416 139399.3463 0.657 0.654 0.660

* 67-72 1702-1829 373 0.519 12.500 598.520 0.028 1.341 0.029 1.389 4.322 206.955 8.121 388.836 2919.537 139788.1819 0.687 0.684 0.690

63-67 1600-1702 372 0.716 5.910 282.973 0.021 1.005 0.022 1.053 0.000 0.000 5.864 280.770 2925.401 140068.9517 0.718 0.714 0.722

60-63 1524-1600 371 0.558 6.892 329.969 0.014 0.670 0.016 0.766 0.000 0.000 6.857 328.315 2932.258 140397.2666 0.56 0.557 0.563

57-60 1448-1524 370 0.527 7.375 353.094 0.014 0.670 0.016 0.766 0.000 0.000 7.343 351.585 2939.601 140748.8514 0.529 0.526 0.532

53-57 1346-1448 369 0.483 10.740 514.225 0.017 0.814 0.020 0.958 0.000 0.000 10.7 512.319 2950.301 141261.1701 0.485 0.483 0.487

* 46-53 1168-1346 368 0.333 24.242 1160.735 0.026 1.245 0.034 1.628 6.282 300.806 17.9 857.057 2968.201 142118.2267 0.507 0.504 0.510

43-46 1092-1168 367 0.529 7.343 351.602 0.010 0.479 0.014 0.670 0.000 0.000 7.319 350.436 2975.52 142468.6623 0.53 0.527 0.533

37-43 940-1092 366 0.470 16.510 790.484 0.017 0.814 0.026 1.245 0.000 0.000 16.46 788.109 2991.98 143256.7713 0.472 0.470 0.474

* 25-37 635-940 365 0.256 46.350 2219.272 0.023 1.101 0.048 2.298 3.539 169.471 42.74 2046.402 3034.72 145303.1735 0.314 0.312 0.316

13-25 330-635 364 0.156 52.619 2519.403 0.010 0.479 0.033 1.580 0.000 0.000 52.56 2516.586 3087.28 147819.7598 0.156 0.155 0.157

* 0-13 0-330 363 0.020 66.137 3166.659 0.000 0.000 0.000 0.000 3.917 187.550 62.22 2979.110 3149.5 150798.8694 0.078 0.074 0.082

 (Z2φ) Two-Phase Level (Dryout) = 97.20 inches = 2468.88 mm

 (S) Level Swell = 2.029

Results for RBHT Test 1578

Valid Time Period 2665 to 2845 seconds

Collapsed Liquid Level = 55.809 inches = 1417.55 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-57 Data Results for RBHT Test 1578

G for Time Period 2665 to 2845 seconds
A-174

Table A-58 Energy Balance Results for RBHT Test 1578G for Time Period 2665 to 2845 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2327.9047 7.343542 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

0.25 6.35 2457.2328 7.751516 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

0.50 12.70 2586.5608 8.159491 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

0.75 19.05 2715.8888 8.567465 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

1.00 25.40 2845.2169 8.97544 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

1.25 31.75 2974.5449 9.383414 0.00E+00 0.00E+00 0.00E+00 1.44E-02 6.51E-03

1.50 38.10 3103.873 9.791389 1.75E-02 2.99E-01 1.36E-01 1.41E-02 6.40E-03

1.75 44.45 3233.201 10.19936 4.01E-02 6.86E-01 3.11E-01 1.38E-02 6.25E-03

2.00 50.80 3362.5291 10.60734 6.36E-02 1.09E+00 4.94E-01 1.34E-02 6.10E-03

2.25 57.15 3491.8571 11.01531 8.80E-02 1.51E+00 6.84E-01 1.31E-02 5.94E-03

2.50 63.50 3621.1851 11.42329 1.13E-01 1.94E+00 8.81E-01 1.27E-02 5.78E-03

2.75 69.85 3750.5132 11.83126 1.40E-01 2.39E+00 1.09E+00 1.24E-02 5.60E-03

3.00 76.20 3879.8412 12.23924 1.67E-01 2.86E+00 1.30E+00 1.20E-02 5.43E-03

3.25 82.55 4009.1693 12.64721 1.95E-01 3.34E+00 1.51E+00 1.16E-02 5.24E-03

3.50 88.90 4138.4973 13.05519 2.24E-01 3.84E+00 1.74E+00 1.11E-02 5.05E-03

3.75 95.25 4267.8253 13.46316 2.54E-01 4.35E+00 1.97E+00 1.07E-02 4.86E-03

4.00 101.60 4397.1534 13.87113 2.85E-01 4.88E+00 2.21E+00 1.03E-02 4.66E-03

4.25 107.95 4526.4814 14.27911 3.17E-01 5.42E+00 2.46E+00 9.81E-03 4.45E-03

4.50 114.30 4655.8095 14.68708 3.50E-01 5.99E+00 2.71E+00 9.34E-03 4.24E-03

4.75 120.65 4785.1375 15.09506 3.83E-01 6.56E+00 2.98E+00 8.86E-03 4.02E-03

5.00 127.00 4914.4655 15.50303 4.18E-01 7.15E+00 3.24E+00 8.36E-03 3.79E-03

5.25 133.35 5043.7936 15.91101 4.53E-01 7.76E+00 3.52E+00 7.85E-03 3.56E-03

5.50 139.70 5173.1216 16.31898 4.90E-01 8.38E+00 3.80E+00 7.33E-03 3.32E-03

5.75 146.05 5302.4497 16.72696 5.27E-01 9.02E+00 4.09E+00 6.79E-03 3.08E-03

6.00 152.40 5431.7777 17.13493 5.65E-01 9.68E+00 4.39E+00 6.24E-03 2.83E-03

6.25 158.75 5561.1057 17.5429 6.04E-01 1.04E+01 4.69E+00 5.68E-03 2.58E-03

6.50 165.10 5690.4338 17.95088 6.45E-01 1.10E+01 5.01E+00 5.10E-03 2.31E-03

6.75 171.45 5819.7618 18.35885 6.86E-01 1.17E+01 5.33E+00 4.51E-03 2.05E-03

7.00 177.80 5949.0899 18.76683 7.28E-01 1.25E+01 5.65E+00 3.91E-03 1.78E-03

7.25 184.15 6078.4179 19.1748 7.70E-01 1.32E+01 5.98E+00 3.30E-03 1.50E-03

7.50 190.50 6207.7459 19.58278 8.14E-01 1.39E+01 6.32E+00 2.67E-03 1.21E-03

7.75 196.85 6337.074 19.99075 8.59E-01 1.47E+01 6.67E+00 2.02E-03 9.18E-04

8.00 203.20 6466.402 20.39873 9.05E-01 1.55E+01 7.03E+00 1.37E-03 6.21E-04

8.25 209.55 6595.7301 20.8067 9.51E-01 1.63E+01 7.39E+00 7.01E-04 3.18E-04

8.50 215.90 6725.0581 21.21468 9.99E-01 1.71E+01 7.76E+00 1.87E-05 8.47E-06

8.75 222.25 6854.3861 21.62265 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

9.00 228.60 6983.7142 22.03062 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

9.25 234.95 6595.7301 20.8067 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

9.50 241.30 6207.7459 19.58278 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

9.75 247.65 5819.7618 18.35885 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

10.00 254.00 5431.7777 17.13493 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

10.25 260.35 5043.7936 15.91101 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

10.50 266.70 4655.8095 14.68708 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

10.75 273.05 4267.8253 13.46316 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

11.00 279.40 3879.8412 12.23924 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

11.25 285.75 3491.8571 11.01531 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

11.50 292.10 3103.873 9.791389 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

11.75 298.45 2715.8888 8.567465 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

12.00 304.80 2327.9047 7.343542 1.00E+00 1.71E+01 7.77E+00 0.00E+00 0.00E+00

Results for RBHT Test 1578

Valid Time Period 2665 to 2845 seconds
A-175

Figure A-145 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578G for Time Period 2665 to 2845 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-176

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-H 

Test Conditions

Date: 6/10/2003

Steady-state time window: 4279 – 4335 seconds

Inlet flow rate: 1.471 cm/sec (0.579 in./sec) 

Inlet mass flow rate: 0.070 kg/sec (0.155 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-177

Figure A-146 Inlet Flow Plot for Experiment 1578H 

Figure A-147 Inlet Temperature Plot for Experiment 1578H 
A-178

Figure A-148 System Pressure Plot for Experiment 1578H 

Figure A-149 Bundle Power Plot for Experiment 1578H 
A-179

Table A-59: Data Results for RBHT Test 1578 for Time Period 4279 to 4335 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.750 14.302 684.804 0.456 21.833 0.126 6.033 0.000 0.000 13.71 656.438 2893.71 138551.5785 0.76 0.756 0.764

* 120-133 3048-3378 383 0.730 18.249 873.784 0.499 23.892 0.224 10.725 0.886 42.439 16.64 796.727 2910.35 139348.306 0.753 0.749 0.757

* 108-120 2743-3048 382 0.648 21.947 1050.829 0.408 19.535 0.280 13.406 5.099 244.142 16.16 773.745 2926.51 140122.0509 0.741 0.737 0.745

100-108 2540-2743 381 0.724 11.482 549.783 0.238 11.396 0.205 9.815 0.000 0.000 11.04 528.598 2937.55 140650.649 0.734 0.730 0.738

97-100 2464-2540 380 0.601 6.211 297.395 0.082 3.926 0.074 3.543 0.000 0.000 6.055 289.915 2943.605 140940.5639 0.611 0.608 0.614

93-97 2362-2464 379 0.594 8.434 403.821 0.103 4.932 0.097 4.644 0.000 0.000 8.234 394.246 2951.839 141334.8099 0.604 0.601 0.607

* 85-93 2159-2362 378 0.446 23.012 1101.803 0.185 8.858 0.185 8.858 7.582 363.011 15.06 721.077 2966.899 142055.8866 0.638 0.635 0.641

81-85 2057-2159 377 0.663 6.995 334.942 0.082 3.926 0.089 4.261 0.000 0.000 6.823 326.687 2973.722 142382.5736 0.672 0.669 0.67578-81 1981-2057 376 0.497 7.832 374.976 0.057 2.729 0.065 3.112 0.000 0.000 7.705 368.917 2981.427 142751.491 0.505 0.502 0.50875-78 1905-1981 375 0.484 8.034 384.674 0.053 2.538 0.063 3.016 0.000 0.000 7.914 378.924 2989.341 143130.4153 0.492 0.490 0.49472-75 1829-1905 374 0.417 9.088 435.151 0.049 2.346 0.062 2.969 0.000 0.000 8.976 429.773 2998.317 143560.1885 0.424 0.422 0.426

* 67-72 1702-1829 373 0.364 16.504 790.235 0.074 3.543 0.100 4.788 2.050 98.174 14.28 683.730 3012.597 144243.9186 0.45 0.448 0.452

63-67 1600-1702 372 0.470 11.010 527.155 0.051 2.442 0.077 3.687 0.000 0.000 10.88 520.937 3023.477 144764.8558 0.476 0.474 0.47860-63 1524-1600 371 0.340 10.283 492.343 0.033 1.580 0.056 2.681 0.000 0.000 10.19 487.900 3033.667 145252.7556 0.346 0.344 0.34857-60 1448-1524 370 0.306 10.807 517.457 0.029 1.389 0.055 2.633 0.000 0.000 10.72 513.276 3044.387 145766.032 0.312 0.310 0.31453-57 1346-1448 369 0.198 16.660 797.695 0.032 1.532 0.071 3.399 0.000 0.000 16.55 792.418 3060.937 146558.4502 0.203 0.202 0.204

* 46-53 1168-1346 368 0.066 33.949 1625.477 0.034 1.628 0.117 5.602 1.838 87.994 31.96 1530.253 3092.897 148088.7032 0.121 0.120 0.122

43-46 1092-1168 367 0.036 15.014 718.870 0.004 0.192 0.024 1.149 0.000 0.000 14.98 717.246 3107.877 148805.9495 0.038 0.036 0.04037-43 940-1092 366 0.036 30.028 1437.740 0.001 0.048 0.000 0.000 0.000 0.000 30.02 1437.365 3137.897 150243.3148 0.036 0.034 0.038

* 25-37 635-940 365 0.026 60.689 2905.817 0.001 0.048 0.000 0.000 0.218 10.450 60.47 2895.319 3198.367 153138.6339 0.029 0.028 0.030

13-25 330-635 364 0.022 60.933 2917.504 0.001 0.048 0.000 0.000 0.000 0.000 60.91 2916.386 3259.277 156055.0204 0.022 0.021 0.023

* 0-13 0-330 363 0.010 66.838 3200.228 0.001 0.048 0.000 0.000 0.097 4.652 66.74 3195.528 3326.017 159250.5487 0.011 0.010 0.012

Results for RBHT Test 1578

Valid Time Period 4279 to 4335 seconds

Collapsed Liquid Level = 89.822 inches = 2281.48 mm

 (Zosv) Onset of Significant Void = 49.5 inches = 1257 mm

Table A-59 Data Results for RBHT Test 1578

H for Time Period 4279 to 4335 seconds
A-180

Table A-60 Energy Balance Results for RBHT Test 1578H for Time Period 4279 to 4335 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2327.9737 7.343759 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

0.25 6.35 2457.3056 7.751746 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

0.50 12.70 2586.6375 8.159733 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

0.75 19.05 2715.9694 8.567719 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

1.00 25.40 2845.3012 8.975706 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

1.25 31.75 2974.6331 9.383693 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

1.50 38.10 3103.965 9.791679 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

1.75 44.45 3233.2969 10.19967 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

2.00 50.80 3362.6287 10.60765 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

2.25 57.15 3491.9606 11.01564 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

2.50 63.50 3621.2925 11.42363 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

2.75 69.85 3750.6244 11.83161 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

3.00 76.20 3879.9562 12.2396 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

3.25 82.55 4009.2881 12.64759 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

3.50 88.90 4138.62 13.05557 0.00E+00 0.00E+00 0.00E+00 4.98E-02 2.26E-02

3.75 95.25 4267.9519 13.46356 1.48E-03 8.84E-02 4.01E-02 4.97E-02 2.25E-02

4.00 101.60 4397.2837 13.87155 1.04E-02 6.19E-01 2.81E-01 4.92E-02 2.23E-02

4.25 107.95 4526.6156 14.27953 1.96E-02 1.17E+00 5.29E-01 4.88E-02 2.21E-02

4.50 114.30 4655.9475 14.68752 2.90E-02 1.73E+00 7.84E-01 4.83E-02 2.19E-02

4.75 120.65 4785.2794 15.09551 3.87E-02 2.31E+00 1.05E+00 4.78E-02 2.17E-02

5.00 127.00 4914.6112 15.50349 4.87E-02 2.90E+00 1.32E+00 4.73E-02 2.15E-02

5.25 133.35 5043.9431 15.91148 5.90E-02 3.51E+00 1.59E+00 4.68E-02 2.12E-02

5.50 139.70 5173.275 16.31947 6.95E-02 4.14E+00 1.88E+00 4.63E-02 2.10E-02

5.75 146.05 5302.6069 16.72745 8.02E-02 4.78E+00 2.17E+00 4.58E-02 2.08E-02

6.00 152.40 5431.9387 17.13544 9.13E-02 5.44E+00 2.47E+00 4.52E-02 2.05E-02

6.25 158.75 5561.2706 17.54343 1.03E-01 6.11E+00 2.77E+00 4.47E-02 2.03E-02

6.50 165.10 5690.6025 17.95141 1.14E-01 6.80E+00 3.09E+00 4.41E-02 2.00E-02

6.75 171.45 5819.9344 18.3594 1.26E-01 7.50E+00 3.40E+00 4.35E-02 1.97E-02

7.00 177.80 5949.2662 18.76739 1.38E-01 8.23E+00 3.73E+00 4.29E-02 1.95E-02

7.25 184.15 6078.5981 19.17537 1.51E-01 8.96E+00 4.07E+00 4.23E-02 1.92E-02

7.50 190.50 6207.93 19.58336 1.63E-01 9.71E+00 4.41E+00 4.16E-02 1.89E-02

7.75 196.85 6337.2619 19.99134 1.76E-01 1.05E+01 4.75E+00 4.10E-02 1.86E-02

8.00 203.20 6466.5937 20.39933 1.89E-01 1.13E+01 5.11E+00 4.03E-02 1.83E-02

8.25 209.55 6595.9256 20.80732 2.03E-01 1.21E+01 5.47E+00 3.97E-02 1.80E-02

8.50 215.90 6725.2575 21.2153 2.16E-01 1.29E+01 5.84E+00 3.90E-02 1.77E-02

8.75 222.25 6854.5894 21.62329 2.30E-01 1.37E+01 6.22E+00 3.83E-02 1.74E-02

9.00 228.60 6983.9212 22.03128 2.45E-01 1.46E+01 6.61E+00 3.76E-02 1.70E-02

9.25 234.95 6595.9256 20.80732 2.59E-01 1.54E+01 6.98E+00 3.69E-02 1.67E-02

9.50 241.30 6207.93 19.58336 2.72E-01 1.62E+01 7.34E+00 3.62E-02 1.64E-02

9.75 247.65 5819.9344 18.3594 2.84E-01 1.69E+01 7.68E+00 3.56E-02 1.62E-02

10.00 254.00 5431.9387 17.13544 2.96E-01 1.76E+01 7.99E+00 3.51E-02 1.59E-02

10.25 260.35 5043.9431 15.91148 3.06E-01 1.82E+01 8.28E+00 3.45E-02 1.57E-02

10.50 266.70 4655.9475 14.68752 3.16E-01 1.88E+01 8.55E+00 3.40E-02 1.54E-02

10.75 273.05 4267.9519 13.46356 3.26E-01 1.94E+01 8.80E+00 3.36E-02 1.52E-02

11.00 279.40 3879.9562 12.2396 3.34E-01 1.99E+01 9.02E+00 3.31E-02 1.50E-02

11.25 285.75 3491.9606 11.01564 3.42E-01 2.03E+01 9.23E+00 3.28E-02 1.49E-02

11.50 292.10 3103.965 9.791679 3.48E-01 2.07E+01 9.41E+00 3.24E-02 1.47E-02

11.75 298.45 2715.9694 8.567719 3.54E-01 2.11E+01 9.57E+00 3.21E-02 1.46E-02

12.00 304.80 2327.9737 7.343759 3.60E-01 2.14E+01 9.71E+00 3.19E-02 1.45E-02

Results for RBHT Test 1578

Valid Time Period 4279 to 4335 seconds
A-181

Figure A-150 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578H for Time Period 4279 to 4335 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-182

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-I 

Test Conditions

Date: 6/10/2003

Steady-state time window: 5296 – 5370 seconds

Inlet flow rate: 2.035 cm/sec (0.801 in./sec) 

Inlet mass flow rate: 0.097 kg/sec (0.214 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-183

Figure A-151 Inlet Flow Plot for Experiment 1578I 

Figure A-152 Inlet Temperature Plot for Experiment 1578I 
A-184

Figure A-153 System Pressure Plot for Experiment 1578I 

Figure A-154 Bundle Power Plot for Experiment 1578I 
A-185

Table A-61: Data Results for RBHT Test 1578 for Time Period 5296 to 5370 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.701 17.065 817.090 0.592 28.345 0.174 8.331 0.000 0.000 16.3 780.448 2896.3 138675.5883 0.715 0.711 0.719

* 120-133 3048-3378 383 0.692 20.799 995.875 0.645 30.883 0.310 14.843 0.134 6.430 19.71 943.720 2916 139619.3082 0.708 0.704 0.712

* 108-120 2743-3048 382 0.603 24.741 1184.607 0.523 25.041 0.387 18.530 4.811 230.353 19.02 910.682 2935 140529.9907 0.695 0.692 0.698

100-108 2540-2743 381 0.674 13.539 648.251 0.300 14.364 0.283 13.550 0.000 0.000 12.95 620.049 2948 141150.04 0.688 0.685 0.691

97-100 2464-2540 380 0.511 7.619 364.781 0.102 4.884 0.102 4.884 0.000 0.000 7.412 354.888 2955.4 141504.9285 0.524 0.521 0.527

93-97 2362-2464 379 0.528 9.810 469.715 0.126 6.033 0.133 6.368 0.000 0.000 9.546 457.065 2964.9 141961.9934 0.54 0.537 0.543

* 85-93 2159-2362 378 0.405 24.715 1183.363 0.222 10.629 0.256 12.257 5.997 287.141 18.24 873.336 2983.2 142835.3293 0.561 0.558 0.564

81-85 2057-2159 377 0.571 8.917 426.946 0.095 4.549 0.123 5.889 0.000 0.000 8.697 416.415 2991.9 143251.7439 0.581 0.578 0.58478-81 1981-2057 376 0.410 9.197 440.373 0.064 3.064 0.090 4.309 0.000 0.000 9.038 432.742 3000.9 143684.4857 0.42 0.418 0.42275-78 1905-1981 375 0.386 9.561 457.779 0.058 2.777 0.088 4.213 0.000 0.000 9.411 450.601 3010.3 144135.0868 0.396 0.394 0.39872-75 1829-1905 374 0.329 10.459 500.797 0.051 2.442 0.086 4.118 0.000 0.000 10.32 494.124 3020.6 144629.211 0.337 0.335 0.339

* 67-72 1702-1829 373 0.277 18.784 899.396 0.070 3.352 0.138 6.607 -0.444 -21.246 19.02 910.682 3039.7 145539.8935 0.267 0.266 0.268

63-67 1600-1702 372 0.190 16.826 805.652 0.041 1.963 0.107 5.123 0.000 0.000 16.67 798.164 3056.3 146338.0574 0.197 0.196 0.19860-63 1524-1600 371 0.028 15.139 724.838 0.021 1.005 0.078 3.735 0.000 0.000 15.03 719.640 3071.4 147057.6977 0.035 0.033 0.03757-60 1448-1524 370 0.055 14.723 704.945 0.010 0.479 0.071 3.399 0.000 0.000 14.64 700.967 3086 147758.6646 0.06 0.057 0.06353-57 1346-1448 369 0.041 19.927 954.101 0.001 0.048 0.000 0.000 0.000 0.000 19.92 953.775 3105.9 148712.4393 0.041 0.039 0.043

* 46-53 1168-1346 368 0.038 34.956 1673.717 0.001 0.048 0.000 0.000 -0.145 -6.928 35.1 1680.597 3141 150393.0364 0.034 0.032 0.036

43-46 1092-1168 367 0.027 15.154 725.584 0.001 0.048 0.000 0.000 0.000 0.000 15.15 725.386 3156.2 151118.4223 0.027 0.026 0.02837-43 940-1092 366 0.029 30.256 1448.681 0.001 0.048 0.000 0.000 0.000 0.000 30.24 1447.899 3186.4 152566.3212 0.029 0.028 0.030

* 25-37 635-940 365 0.021 61.032 2922.229 0.003 0.144 0.000 0.000 0.249 11.923 60.78 2910.162 3247.2 155476.4832 0.024 0.023 0.025

13-25 330-635 364 0.020 61.089 2924.964 0.003 0.144 0.000 0.000 0.000 0.000 61.07 2924.047 3308.3 158400.5305 0.02 0.019 0.021

* 0-13 0-330 363 0.009 66.895 3202.963 0.003 0.144 0.000 0.000 0.072 3.461 66.82 3199.359 3375.1 161599.8893 0.01 0.010 0.011

Results for RBHT Test 1578

Valid Time Period 5296 to 5370 seconds

Collapsed Liquid Level = 98.800 inches = 2509.51 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-61 Data Results for RBHT Test 1578I for Time Period 5296 to 5370 seconds
A-186

Table A-62 Energy Balance Results for RBHT Test 1578I for Time Period 5296 to 5370 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2327.5966 7.34257 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

0.25 6.35 2456.9076 7.75049 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

0.50 12.70 2586.2185 8.158411 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

0.75 19.05 2715.5294 8.566331 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

1.00 25.40 2844.8403 8.974252 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

1.25 31.75 2974.1513 9.382172 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

1.50 38.10 3103.4622 9.790093 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

1.75 44.45 3232.7731 10.19801 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

2.00 50.80 3362.084 10.60593 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

2.25 57.15 3491.395 11.01385 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

2.50 63.50 3620.7059 11.42178 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

2.75 69.85 3750.0168 11.8297 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

3.00 76.20 3879.3277 12.23762 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

3.25 82.55 4008.6387 12.64554 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

3.50 88.90 4137.9496 13.05346 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

3.75 95.25 4267.2605 13.46138 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

4.00 101.60 4396.5714 13.8693 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

4.25 107.95 4525.8824 14.27722 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

4.50 114.30 4655.1933 14.68514 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

4.75 120.65 4784.5042 15.09306 0.00E+00 0.00E+00 0.00E+00 6.88E-02 3.12E-02

5.00 127.00 4913.8151 15.50098 6.76E-03 5.56E-01 2.52E-01 6.83E-02 3.10E-02

5.25 133.35 5043.1261 15.9089 1.42E-02 1.17E+00 5.29E-01 6.78E-02 3.08E-02

5.50 139.70 5172.437 16.31682 2.18E-02 1.79E+00 8.12E-01 6.73E-02 3.05E-02

5.75 146.05 5301.7479 16.72474 2.96E-02 2.43E+00 1.10E+00 6.68E-02 3.03E-02

6.00 152.40 5431.0588 17.13266 3.75E-02 3.09E+00 1.40E+00 6.62E-02 3.00E-02

6.25 158.75 5560.3697 17.54058 4.57E-02 3.76E+00 1.71E+00 6.57E-02 2.98E-02

6.50 165.10 5689.6807 17.9485 5.41E-02 4.45E+00 2.02E+00 6.51E-02 2.95E-02

6.75 171.45 5818.9916 18.35642 6.27E-02 5.15E+00 2.34E+00 6.45E-02 2.93E-02

7.00 177.80 5948.3025 18.76434 7.14E-02 5.87E+00 2.66E+00 6.39E-02 2.90E-02

7.25 184.15 6077.6134 19.17227 8.04E-02 6.61E+00 3.00E+00 6.33E-02 2.87E-02

7.50 190.50 6206.9244 19.58019 8.95E-02 7.36E+00 3.34E+00 6.27E-02 2.84E-02

7.75 196.85 6336.2353 19.98811 9.88E-02 8.13E+00 3.69E+00 6.20E-02 2.81E-02

8.00 203.20 6465.5462 20.39603 1.08E-01 8.91E+00 4.04E+00 6.14E-02 2.78E-02

8.25 209.55 6594.8571 20.80395 1.18E-01 9.72E+00 4.41E+00 6.07E-02 2.75E-02

8.50 215.90 6724.1681 21.21187 1.28E-01 1.05E+01 4.78E+00 6.00E-02 2.72E-02

8.75 222.25 6853.479 21.61979 1.38E-01 1.14E+01 5.15E+00 5.93E-02 2.69E-02

9.00 228.60 6982.7899 22.02771 1.48E-01 1.22E+01 5.54E+00 5.86E-02 2.66E-02

9.25 234.95 6594.8571 20.80395 1.59E-01 1.30E+01 5.92E+00 5.79E-02 2.63E-02

9.50 241.30 6206.9244 19.58019 1.68E-01 1.38E+01 6.27E+00 5.72E-02 2.60E-02

9.75 247.65 5818.9916 18.35642 1.77E-01 1.46E+01 6.60E+00 5.66E-02 2.57E-02

10.00 254.00 5431.0588 17.13266 1.85E-01 1.52E+01 6.92E+00 5.61E-02 2.54E-02

10.25 260.35 5043.1261 15.9089 1.93E-01 1.59E+01 7.21E+00 5.55E-02 2.52E-02

10.50 266.70 4655.1933 14.68514 2.00E-01 1.65E+01 7.48E+00 5.50E-02 2.50E-02

10.75 273.05 4267.2605 13.46138 2.07E-01 1.70E+01 7.72E+00 5.46E-02 2.48E-02

11.00 279.40 3879.3277 12.23762 2.13E-01 1.75E+01 7.95E+00 5.42E-02 2.46E-02

11.25 285.75 3491.395 11.01385 2.19E-01 1.80E+01 8.15E+00 5.38E-02 2.44E-02

11.50 292.10 3103.4622 9.790093 2.23E-01 1.84E+01 8.34E+00 5.34E-02 2.42E-02

11.75 298.45 2715.5294 8.566331 2.28E-01 1.87E+01 8.50E+00 5.31E-02 2.41E-02

12.00 304.80 2327.5966 7.34257 2.32E-01 1.90E+01 8.64E+00 5.29E-02 2.40E-02

Results for RBHT Test 1578

Valid Time Period 5296 to 5370 seconds
A-187

Figure A-155 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578I for Time Period 5296 to 5370 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-188

RBHT Two-Phase Mixture Level and Uncovery Test INT-1578-J 

Test Conditions

Date: 6/10/2003

Steady-state time window: 5566 – 5676 seconds

Inlet flow rate: 1.019 cm/sec (0.401 in./sec) 

Inlet mass flow rate: 0.049 kg/sec (0.107 lbm/sec) 

Inlet flow temperature: 328.5 K (131.7 oF)

Upper plenum pressure: 133.8 kPa (19.4 psia)

Bundle power: 69.53 kW 
A-189

Figure A-156 Inlet Flow Plot for Experiment 1578J 

Figure A-157 Inlet Temperature Plot for Experiment 1578J 
A-190

Figure A-158 System Pressure Plot for Experiment 1578J 

Figure A-159 Bundle Power Plot for Experiment 1578J 
A-191

Table A-63: Data Results for RBHT Test 1578 for Time Period 5566 to 5676 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.804 11.223 537.350 0.332 15.896 0.087 4.166 0.000 0.000 10.8 517.107 2890.8 138412.2469 0.811 0.807 0.815

* 120-133 3048-3378 383 0.768 15.684 750.947 0.364 17.428 0.155 7.421 1.435 68.701 13.73 657.396 2904.53 139069.6429 0.797 0.793 0.801

* 108-120 2743-3048 382 0.678 20.098 962.306 0.299 14.316 0.194 9.289 5.155 246.832 14.45 691.870 2918.98 139761.5126 0.768 0.764 0.772

100-108 2540-2743 381 0.746 10.548 505.024 0.175 8.379 0.142 6.799 0.000 0.000 10.23 489.815 2929.21 140251.3276 0.754 0.750 0.758

97-100 2464-2540 380 0.644 5.541 265.318 0.061 2.921 0.051 2.442 0.000 0.000 5.43 259.990 2934.64 140511.3174 0.651 0.648 0.654

93-97 2362-2464 379 0.635 7.577 362.792 0.076 3.639 0.067 3.208 0.000 0.000 7.429 355.702 2942.069 140867.0198 0.642 0.639 0.645

* 85-93 2159-2362 378 0.468 22.087 1057.542 0.139 6.655 0.128 6.129 8.130 389.278 13.69 655.481 2955.759 141522.5006 0.671 0.668 0.674

81-85 2057-2159 377 0.693 6.383 305.601 0.063 3.016 0.061 2.921 0.000 0.000 6.257 299.587 2962.016 141822.0873 0.699 0.696 0.702

78-81 1981-2057 376 0.533 7.281 348.618 0.044 2.107 0.045 2.155 0.000 0.000 7.188 344.163 2969.204 142166.2506 0.539 0.536 0.542

75-78 1905-1981 375 0.528 7.349 351.851 0.041 1.963 0.044 2.107 0.000 0.000 7.261 347.659 2976.465 142513.9092 0.534 0.531 0.537

72-75 1829-1905 374 0.467 8.299 397.355 0.039 1.867 0.043 2.059 0.000 0.000 8.213 393.241 2984.678 142907.1497 0.473 0.471 0.475

* 67-72 1702-1829 373 0.388 15.897 761.142 0.060 2.873 0.069 3.304 3.138 150.238 12.63 604.728 2997.308 143511.8773 0.513 0.510 0.516

63-67 1600-1702 372 0.549 9.364 448.330 0.043 2.059 0.053 2.538 0.000 0.000 9.262 443.467 3006.57 143955.3443 0.554 0.551 0.557

60-63 1524-1600 371 0.394 9.447 452.309 0.029 1.389 0.039 1.867 0.000 0.000 9.373 448.782 3015.943 144404.1259 0.398 0.396 0.400

57-60 1448-1524 370 0.362 9.935 475.683 0.027 1.293 0.038 1.819 0.000 0.000 9.867 472.434 3025.81 144876.5604 0.367 0.365 0.369

53-57 1346-1448 369 0.311 14.323 685.799 0.032 1.532 0.049 2.346 0.000 0.000 14.24 681.815 3040.05 145558.3753 0.314 0.312 0.316

* 46-53 1168-1346 368 0.196 29.228 1399.447 0.045 2.155 0.081 3.878 2.582 123.630 26.52 1269.784 3066.57 146828.1597 0.27 0.269 0.271

43-46 1092-1168 367 0.223 12.111 579.870 0.015 0.718 0.033 1.580 0.000 0.000 12.06 577.436 3078.63 147405.5956 0.226 0.225 0.227

37-43 940-1092 366 0.094 28.241 1352.202 0.021 1.005 0.063 3.016 0.000 0.000 28.15 1347.829 3106.78 148753.4248 0.096 0.091 0.101

* 25-37 635-940 365 0.036 60.092 2877.221 0.018 0.862 0.038 1.819 1.586 75.939 58.45 2798.601 3165.23 151552.0259 0.062 0.059 0.065

13-25 330-635 364 0.027 60.617 2902.336 0.001 0.048 0.000 0.000 0.000 0.000 60.59 2901.065 3225.82 154453.0906 0.027 0.026 0.028

* 0-13 0-330 363 0.011 66.739 3195.504 0.001 0.048 0.000 0.000 0.168 8.067 66.57 3187.389 3292.39 157640.4793 0.014 0.013 0.015

Results for RBHT Test 1578

Valid Time Period 5566 to 5676 seconds

Collapsed Liquid Level = 81.472 inches = 2069.38 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-63 Data Results for RBHT Test 1578

J for Time Period 5566 to 5676 seconds
A-192

Table A-64 Energy Balance Results for RBHT Test 1578J for Time Period 5566 to 5676 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2329.5553 7.348748 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.25 6.35 2458.975 7.757012 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.50 12.70 2588.3948 8.165276 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

0.75 19.05 2717.8145 8.57354 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.00 25.40 2847.2343 8.981804 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.25 31.75 2976.654 9.390067 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.50 38.10 3106.0737 9.798331 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

1.75 44.45 3235.4935 10.2066 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.00 50.80 3364.9132 10.61486 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.25 57.15 3494.3329 11.02312 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.50 63.50 3623.7527 11.43139 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

2.75 69.85 3753.1724 11.83965 0.00E+00 0.00E+00 0.00E+00 3.45E-02 1.56E-02

3.00 76.20 3882.5922 12.24791 1.06E-02 4.34E-01 1.97E-01 3.41E-02 1.55E-02

3.25 82.55 4012.0119 12.65618 2.23E-02 9.17E-01 4.16E-01 3.37E-02 1.53E-02

3.50 88.90 4141.4316 13.06444 3.44E-02 1.42E+00 6.42E-01 3.33E-02 1.51E-02

3.75 95.25 4270.8514 13.47271 4.69E-02 1.93E+00 8.75E-01 3.29E-02 1.49E-02

4.00 101.60 4400.2711 13.88097 5.98E-02 2.46E+00 1.12E+00 3.24E-02 1.47E-02

4.25 107.95 4529.6909 14.28923 7.30E-02 3.01E+00 1.36E+00 3.20E-02 1.45E-02

4.50 114.30 4659.1106 14.6975 8.67E-02 3.57E+00 1.62E+00 3.15E-02 1.43E-02

4.75 120.65 4788.5303 15.10576 1.01E-01 4.14E+00 1.88E+00 3.10E-02 1.41E-02

5.00 127.00 4917.9501 15.51402 1.15E-01 4.74E+00 2.15E+00 3.05E-02 1.38E-02

5.25 133.35 5047.3698 15.92229 1.30E-01 5.35E+00 2.43E+00 3.00E-02 1.36E-02

5.50 139.70 5176.7896 16.33055 1.45E-01 5.97E+00 2.71E+00 2.95E-02 1.34E-02

5.75 146.05 5306.2093 16.73882 1.61E-01 6.61E+00 3.00E+00 2.89E-02 1.31E-02

6.00 152.40 5435.629 17.14708 1.77E-01 7.27E+00 3.30E+00 2.84E-02 1.29E-02

6.25 158.75 5565.0488 17.55534 1.93E-01 7.94E+00 3.60E+00 2.78E-02 1.26E-02

6.50 165.10 5694.4685 17.96361 2.10E-01 8.63E+00 3.92E+00 2.72E-02 1.24E-02

6.75 171.45 5823.8882 18.37187 2.27E-01 9.34E+00 4.23E+00 2.67E-02 1.21E-02

7.00 177.80 5953.308 18.78013 2.44E-01 1.01E+01 4.56E+00 2.60E-02 1.18E-02

7.25 184.15 6082.7277 19.1884 2.62E-01 1.08E+01 4.89E+00 2.54E-02 1.15E-02

7.50 190.50 6212.1475 19.59666 2.80E-01 1.15E+01 5.24E+00 2.48E-02 1.13E-02

7.75 196.85 6341.5672 20.00493 2.99E-01 1.23E+01 5.58E+00 2.42E-02 1.10E-02

8.00 203.20 6470.9869 20.41319 3.18E-01 1.31E+01 5.94E+00 2.35E-02 1.07E-02

8.25 209.55 6600.4067 20.82145 3.38E-01 1.39E+01 6.30E+00 2.28E-02 1.04E-02

8.50 215.90 6729.8264 21.22972 3.57E-01 1.47E+01 6.67E+00 2.22E-02 1.00E-02

8.75 222.25 6859.2462 21.63798 3.78E-01 1.55E+01 7.05E+00 2.15E-02 9.73E-03

9.00 228.60 6988.6659 22.04625 3.98E-01 1.64E+01 7.43E+00 2.08E-02 9.41E-03

9.25 234.95 6600.4067 20.82145 4.18E-01 1.72E+01 7.81E+00 2.01E-02 9.10E-03

9.50 241.30 6212.1475 19.59666 4.37E-01 1.80E+01 8.16E+00 1.94E-02 8.80E-03

9.75 247.65 5823.8882 18.37187 4.55E-01 1.87E+01 8.50E+00 1.88E-02 8.52E-03

10.00 254.00 5435.629 17.14708 4.72E-01 1.94E+01 8.81E+00 1.82E-02 8.26E-03

10.25 260.35 5047.3698 15.92229 4.87E-01 2.01E+01 9.10E+00 1.77E-02 8.01E-03

10.50 266.70 4659.1106 14.6975 5.02E-01 2.07E+01 9.37E+00 1.72E-02 7.79E-03

10.75 273.05 4270.8514 13.47271 5.15E-01 2.12E+01 9.62E+00 1.67E-02 7.58E-03

11.00 279.40 3882.5922 12.24791 5.27E-01 2.17E+01 9.84E+00 1.63E-02 7.39E-03

11.25 285.75 3494.3329 11.02312 5.38E-01 2.22E+01 1.00E+01 1.59E-02 7.22E-03

11.50 292.10 3106.0737 9.798331 5.48E-01 2.26E+01 1.02E+01 1.56E-02 7.07E-03

11.75 298.45 2717.8145 8.57354 5.57E-01 2.29E+01 1.04E+01 1.53E-02 6.93E-03

12.00 304.80 2329.5553 7.348748 5.64E-01 2.32E+01 1.05E+01 1.50E-02 6.82E-03

Results for RBHT Test 1578

Valid Time Period 5566 to 5676 seconds
A-193

Figure A-160 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1578J for Time Period 5566 to 5676 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-194

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-A 

Test Conditions

Date: 6/11/2003

Steady-state time window: 1010 – 1080 seconds

Inlet flow rate: 4.021 cm/sec (1.583 in./sec) 

Inlet mass flow rate: 0.192 kg/sec (0.423 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-195

Figure A-161 Inlet Flow Plot for Experiment 1582A 

Figure A-162 Inlet Temperature Plot for Experiment 1582A 
A-196

Figure A-163 System Pressure Plot for Experiment 1582A 

Figure A-164 Bundle Power Plot for Experiment 1582A 
A-197

Table A-65: Data Results for RBHT Test 1582 for Time Period 1010 to 1080 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.792 11.903 569.924 2.108 100.932 0.684 32.750 0.000 0.000 9.107 436.046 2889.107 138331.1857 0.841 0.837 0.845

* 120-133 3048-3378 383 0.755 16.567 793.219 2.295 109.885 1.220 58.414 2.292 109.728 10.76 515.192 2899.867 138846.3772 0.841 0.837 0.845

* 108-120 2743-3048 382 0.709 18.156 869.308 1.853 88.722 1.523 72.922 4.863 232.836 9.917 474.829 2909.784 139321.2057 0.841 0.837 0.845

100-108 2540-2743 381 0.789 8.787 420.729 1.061 50.801 1.114 53.339 0.000 0.000 6.607 316.345 2916.391 139637.5506 0.841 0.837 0.845

97-100 2464-2540 380 0.726 4.264 204.148 0.359 17.189 0.403 19.296 0.000 0.000 3.499 167.533 2919.89 139805.0836 0.775 0.771 0.779

93-97 2362-2464 379 0.730 5.604 268.302 0.446 21.355 0.525 25.137 0.000 0.000 4.633 221.829 2924.523 140026.9128 0.777 0.773 0.781

* 85-93 2159-2362 378 0.552 18.597 890.444 0.780 37.347 1.008 48.263 6.945 332.543 9.864 472.291 2934.387 140499.2037 0.763 0.759 0.767

81-85 2057-2159 377 0.709 6.050 289.687 0.333 15.944 0.483 23.126 0.000 0.000 5.231 250.462 2939.618 140749.6653 0.748 0.744 0.75278-81 1981-2057 376 0.562 6.819 326.488 0.224 10.725 0.353 16.902 0.000 0.000 6.239 298.725 2945.857 141048.3902 0.599 0.596 0.60275-78 1905-1981 375 0.538 7.203 344.889 0.202 9.672 0.345 16.519 0.000 0.000 6.653 318.547 2952.51 141366.9376 0.573 0.570 0.57672-75 1829-1905 374 0.472 8.221 393.626 0.179 8.571 0.337 16.136 0.000 0.000 7.704 368.869 2960.214 141735.8071 0.505 0.502 0.508

* 67-72 1702-1829 373 0.379 16.125 772.083 0.244 11.683 0.544 26.047 0.867 41.526 14.47 692.827 2974.684 142428.6344 0.443 0.441 0.445

63-67 1600-1702 372 0.353 13.446 643.775 0.142 6.799 0.420 20.110 0.000 0.000 12.88 616.698 2987.564 143045.3321 0.38 0.378 0.38260-63 1524-1600 371 0.104 13.965 668.641 0.071 3.399 0.305 14.603 0.000 0.000 13.58 650.214 3001.144 143695.546 0.128 0.127 0.12957-60 1448-1524 370 0.057 14.687 703.205 0.033 1.580 0.250 11.970 0.000 0.000 14.4 689.476 3015.544 144385.0217 0.075 0.071 0.07953-57 1346-1448 369 0.042 19.906 953.106 0.003 0.144 0.000 0.000 0.000 0.000 19.89 952.338 3035.434 145337.36 0.042 0.040 0.044

* 46-53 1168-1346 368 0.039 34.951 1673.468 0.006 0.287 0.000 0.000 -0.205 -9.810 35.15 1682.991 3070.584 147020.3511 0.033 0.031 0.035

43-46 1092-1168 367 0.023 15.216 728.568 0.002 0.096 0.000 0.000 0.000 0.000 15.21 728.259 3085.794 147748.6098 0.023 0.022 0.02437-43 940-1092 366 0.029 30.262 1448.930 0.005 0.239 0.000 0.000 0.000 0.000 30.25 1448.378 3116.044 149196.9875 0.029 0.028 0.030

* 25-37 635-940 365 0.020 61.079 2924.466 0.010 0.479 0.000 0.000 0.269 12.868 60.8 2911.120 3176.844 152108.1072 0.024 0.023 0.025

13-25 330-635 364 0.019 61.131 2926.953 0.010 0.479 0.000 0.000 0.000 0.000 61.1 2925.484 3237.944 155033.5909 0.019 0.018 0.020

* 0-13 0-330 363 0.008 66.999 3207.937 0.011 0.527 0.000 0.000 0.148 7.093 66.84 3200.316 3304.784 158233.9072 0.01 0.010 0.011

Results for RBHT Test 1582

Valid Time Period 1010 to 1080 seconds

Collapsed Liquid Level = 88.1324 inches = 2238.56 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-65 Data Results for RBHT Test 1582

A for Time Period 1010 to 1080 seconds
A-198

Table A-66 Energy Balance Results for RBHT Test 1582A for Time Period 1010 to 1080 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4652.9395 14.67803 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

0.25 6.35 4911.4362 15.49348 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

0.50 12.70 5169.9328 16.30892 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

0.75 19.05 5428.4295 17.12437 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

1.00 25.40 5686.9261 17.93981 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

1.25 31.75 5945.4227 18.75526 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

1.50 38.10 6203.9194 19.57071 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

1.75 44.45 6462.416 20.38615 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

2.00 50.80 6720.9127 21.2016 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

2.25 57.15 6979.4093 22.01704 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

2.50 63.50 7237.9059 22.83249 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

2.75 69.85 7496.4026 23.64794 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

3.00 76.20 7754.8992 24.46338 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

3.25 82.55 8013.3959 25.27883 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

3.50 88.90 8271.8925 26.09428 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

3.75 95.25 8530.3891 26.90972 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

4.00 101.60 8788.8858 27.72517 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

4.25 107.95 9047.3824 28.54061 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

4.50 114.30 9305.8791 29.35606 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

4.75 120.65 9564.3757 30.17151 0.00E+00 0.00E+00 0.00E+00 1.36E-01 6.17E-02

5.00 127.00 9822.8723 30.98695 6.12E-03 9.93E-01 4.50E-01 1.35E-01 6.13E-02

5.25 133.35 10081.369 31.8024 1.36E-02 2.21E+00 1.00E+00 1.34E-01 6.08E-02

5.50 139.70 10339.866 32.61784 2.13E-02 3.45E+00 1.57E+00 1.33E-01 6.04E-02

5.75 146.05 10598.362 33.43329 2.92E-02 4.73E+00 2.15E+00 1.32E-01 5.99E-02

6.00 152.40 10856.859 34.24874 3.73E-02 6.04E+00 2.74E+00 1.31E-01 5.94E-02

6.25 158.75 11115.356 35.06418 4.55E-02 7.38E+00 3.35E+00 1.30E-01 5.89E-02

6.50 165.10 11373.852 35.87963 5.40E-02 8.76E+00 3.97E+00 1.29E-01 5.84E-02

6.75 171.45 11632.349 36.69507 6.27E-02 1.02E+01 4.61E+00 1.27E-01 5.78E-02

7.00 177.80 11890.845 37.51052 7.15E-02 1.16E+01 5.26E+00 1.26E-01 5.73E-02

7.25 184.15 12149.342 38.32597 8.06E-02 1.31E+01 5.93E+00 1.25E-01 5.67E-02

7.50 190.50 12407.839 39.14141 8.98E-02 1.46E+01 6.61E+00 1.24E-01 5.61E-02

7.75 196.85 12666.335 39.95686 9.93E-02 1.61E+01 7.30E+00 1.22E-01 5.56E-02

8.00 203.20 12924.832 40.77231 1.09E-01 1.77E+01 8.01E+00 1.21E-01 5.50E-02

8.25 209.55 13183.329 41.58775 1.19E-01 1.93E+01 8.73E+00 1.20E-01 5.44E-02

8.50 215.90 13441.825 42.4032 1.29E-01 2.09E+01 9.47E+00 1.18E-01 5.37E-02

8.75 222.25 13700.322 43.21864 1.39E-01 2.25E+01 1.02E+01 1.17E-01 5.31E-02

9.00 228.60 13958.819 44.03409 1.49E-01 2.42E+01 1.10E+01 1.16E-01 5.25E-02

9.25 234.95 13183.329 41.58775 1.60E-01 2.59E+01 1.17E+01 1.14E-01 5.18E-02

9.50 241.30 12407.839 39.14141 1.69E-01 2.74E+01 1.24E+01 1.13E-01 5.12E-02

9.75 247.65 11632.349 36.69507 1.78E-01 2.89E+01 1.31E+01 1.12E-01 5.07E-02

10.00 254.00 10856.859 34.24874 1.87E-01 3.03E+01 1.37E+01 1.11E-01 5.02E-02

10.25 260.35 10081.369 31.8024 1.95E-01 3.16E+01 1.43E+01 1.10E-01 4.97E-02

10.50 266.70 9305.8791 29.35606 2.02E-01 3.27E+01 1.49E+01 1.09E-01 4.92E-02

10.75 273.05 8530.3891 26.90972 2.09E-01 3.38E+01 1.53E+01 1.08E-01 4.88E-02

11.00 279.40 7754.8992 24.46338 2.15E-01 3.48E+01 1.58E+01 1.07E-01 4.84E-02

11.25 285.75 6979.4093 22.01704 2.20E-01 3.57E+01 1.62E+01 1.06E-01 4.81E-02

11.50 292.10 6203.9194 19.57071 2.25E-01 3.65E+01 1.66E+01 1.05E-01 4.78E-02

11.75 298.45 5428.4295 17.12437 2.30E-01 3.73E+01 1.69E+01 1.05E-01 4.75E-02

12.00 304.80 4652.9395 14.67803 2.34E-01 3.79E+01 1.72E+01 1.04E-01 4.73E-02

Results for RBHT Test 1582

Valid Time Period 1010 to 1080 seconds
A-199

Figure A-165 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582A for Time Period 1010 to 1080 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-200

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-B 

Test Conditions

Date: 6/11/2003

Steady-state time window: 1694 – 1748 seconds

Inlet flow rate: 4.021 cm/sec (1.583 in./sec) 

Inlet mass flow rate: 0.192 kg/sec (0.423 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-201

Figure A-166 Inlet Flow Plot for Experiment 1582B 

Figure A-167 Inlet Temperature Plot for Experiment 1582B 
A-202

Figure A-168 System Pressure Plot for Experiment 1582B 

Figure A-169 Bundle Power Plot for Experiment 1582B 
A-203

Table A-67: Data Results for RBHT Test 1582 for Time Period 1694 to 1748 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.797 11.597 555.253 2.122 101.602 0.689 32.989 0.000 0.000 8.783 420.532 2888.783 138315.6725 0.846 0.842 0.850

* 120-133 3048-3378 383 0.754 16.577 793.716 2.309 110.556 1.230 58.893 2.548 122.004 10.49 502.264 2899.273 138817.9364 0.845 0.841 0.849

* 108-120 2743-3048 382 0.710 18.073 865.330 1.864 89.249 1.535 73.496 4.781 228.905 9.893 473.679 2909.166 139291.6157 0.841 0.837 0.845

100-108 2540-2743 381 0.787 8.855 423.962 1.067 51.088 1.123 53.770 0.000 0.000 6.665 319.122 2915.831 139610.7376 0.84 0.836 0.844

97-100 2464-2540 380 0.727 4.259 203.900 0.361 17.285 0.406 19.439 0.000 0.000 3.492 167.198 2919.323 139777.9355 0.776 0.772 0.780

93-97 2362-2464 379 0.727 5.671 271.535 0.448 21.450 0.529 25.329 0.000 0.000 4.691 224.606 2924.014 140002.5418 0.774 0.770 0.778

* 85-93 2159-2362 378 0.555 18.509 886.217 0.783 37.490 1.016 48.646 6.760 323.672 9.95 476.409 2933.964 140478.9503 0.76 0.756 0.764

81-85 2057-2159 377 0.707 6.081 291.178 0.334 15.992 0.487 23.318 0.000 0.000 5.258 251.754 2939.222 140730.7047 0.747 0.743 0.75178-81 1981-2057 376 0.561 6.845 327.731 0.225 10.773 0.356 17.045 0.000 0.000 6.264 299.922 2945.486 141030.6267 0.598 0.595 0.60175-78 1905-1981 375 0.542 7.141 341.905 0.202 9.672 0.348 16.662 0.000 0.000 6.589 315.483 2952.075 141346.1097 0.577 0.574 0.58072-75 1829-1905 374 0.472 8.226 393.874 0.179 8.571 0.340 16.279 0.000 0.000 7.705 368.917 2959.78 141715.0271 0.505 0.502 0.508

* 67-72 1702-1829 373 0.381 16.084 770.094 0.244 11.683 0.549 26.286 0.851 40.734 14.44 691.391 2974.22 142406.418 0.444 0.442 0.446

63-67 1600-1702 372 0.355 13.409 642.035 0.141 6.751 0.423 20.253 0.000 0.000 12.84 614.782 2987.06 143021.2005 0.382 0.380 0.38460-63 1524-1600 371 0.103 13.980 669.387 0.069 3.304 0.308 14.747 0.000 0.000 13.6 651.171 3000.66 143672.372 0.127 0.126 0.12857-60 1448-1524 370 0.059 14.666 702.210 0.032 1.532 0.230 11.012 0.000 0.000 14.4 689.476 3015.06 144361.8477 0.076 0.072 0.08053-57 1346-1448 369 0.042 19.911 953.355 0.003 0.144 0.000 0.000 0.000 0.000 19.9 952.817 3034.96 145314.6648 0.042 0.040 0.044

* 46-53 1168-1346 368 0.039 34.951 1673.468 0.006 0.287 0.000 0.000 -0.215 -10.289 35.16 1683.470 3070.12 146998.1346 0.033 0.031 0.035

43-46 1092-1168 367 0.023 15.216 728.568 0.002 0.096 0.000 0.000 0.000 0.000 15.21 728.259 3085.33 147726.3933 0.023 0.022 0.02437-43 940-1092 366 0.028 30.277 1449.676 0.005 0.239 0.000 0.000 0.000 0.000 30.26 1448.857 3115.59 149175.2499 0.029 0.028 0.030

* 25-37 635-940 365 0.020 61.105 2925.710 0.010 0.479 0.000 0.000 0.275 13.154 60.82 2912.077 3176.41 152087.3271 0.024 0.023 0.025

13-25 330-635 364 0.019 61.141 2927.450 0.010 0.479 0.000 0.000 0.000 0.000 61.11 2925.963 3237.52 155013.2896 0.019 0.018 0.020

* 0-13 0-330 363 0.008 67.004 3208.185 0.011 0.527 0.000 0.000 0.143 6.863 66.85 3200.795 3304.37 158214.0848 0.01 0.010 0.011

Results for RBHT Test 1582

Valid Time Period 1694 to 1748 seconds

Collapsed Liquid Level = 88.338 inches = 2243.79 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-67 Data Results for RBHT Test 1582

B for Time Period 1694 to 1748 seconds
A-204

Table A-68 Energy Balance Results for RBHT Test 1582B for Time Period 1694 to 1748 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

0.25 6.35 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

0.50 12.70 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

0.75 19.05 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

1.00 25.40 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

1.25 31.75 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

1.50 38.10 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

1.75 44.45 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

2.00 50.80 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

2.25 57.15 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

2.50 63.50 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

2.75 69.85 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

3.00 76.20 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

3.25 82.55 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

3.50 88.90 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

3.75 95.25 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

4.00 101.60 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

4.25 107.95 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

4.50 114.30 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

4.75 120.65 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

5.00 127.00 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

5.25 133.35 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

5.50 139.70 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

5.75 146.05 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

6.00 152.40 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

6.25 158.75 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

6.50 165.10 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

6.75 171.45 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

7.00 177.80 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

7.25 184.15 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

7.50 190.50 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

7.75 196.85 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

8.00 203.20 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

8.25 209.55 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

8.50 215.90 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

8.75 222.25 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

9.00 228.60 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

9.25 234.95 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

9.50 241.30 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

9.75 247.65 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

10.00 254.00 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

10.25 260.35 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

10.50 266.70 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

10.75 273.05 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

11.00 279.40 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

11.25 285.75 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

11.50 292.10 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

11.75 298.45 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

12.00 304.80 0 0 0.00E+00 0.00E+00 0.00E+00 1.37E-01 6.21E-02

Results for RBHT Test 1582

Valid Time Period 1694 to 1748 seconds
A-205

Figure A-170 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582B for Time Period 1694 to 1748 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-206

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-C 

Test Conditions

Date: 6/11/2003

Steady-state time window: 2039 – 2100 seconds

Inlet flow rate: 3.546 cm/sec (1.396 in./sec) 

Inlet mass flow rate: 0.169 kg/sec (0.373 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-207

Figure A-171 Inlet Flow Plot for Experiment 1582C 

Figure A-172 Inlet Temperature Plot for Experiment 1582C 
A-208

Figure A-173 System Pressure Plot for Experiment 1582C 

Figure A-174 Bundle Power Plot for Experiment 1582C 
A-209

Table A-69: Data Results for RBHT Test 1582 for Time Period 2039 to 2100 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.820 10.304 493.337 1.914 91.643 0.602 28.824 0.000 0.000 7.784 372.700 2887.784 138267.8401 0.864 0.860 0.868

* 120-133 3048-3378 383 0.776 15.139 724.838 2.088 99.974 1.076 51.519 2.631 125.952 9.344 447.393 2897.128 138715.2332 0.862 0.858 0.866

* 108-120 2743-3048 382 0.731 16.774 803.165 1.694 81.109 1.342 64.255 4.843 231.906 8.895 425.895 2906.023 139141.1281 0.857 0.853 0.861

100-108 2540-2743 381 0.808 7.982 382.187 0.978 46.827 0.982 47.018 0.000 0.000 6.02 288.239 2912.043 139429.3672 0.855 0.851 0.859

97-100 2464-2540 380 0.752 3.859 184.753 0.333 15.944 0.355 16.997 0.000 0.000 3.167 151.637 2915.21 139581.004 0.797 0.793 0.801

93-97 2362-2464 379 0.755 5.084 243.436 0.416 19.918 0.463 22.169 0.000 0.000 4.205 201.336 2919.415 139782.3405 0.798 0.794 0.802

* 85-93 2159-2362 378 0.590 17.050 816.344 0.738 35.336 0.889 42.566 6.684 320.017 8.739 418.426 2928.154 140200.7661 0.79 0.786 0.794

81-85 2057-2159 377 0.746 5.282 252.885 0.321 15.370 0.426 20.397 0.000 0.000 4.534 217.089 2932.688 140417.8551 0.782 0.778 0.786

78-81 1981-2057 376 0.623 5.868 280.984 0.220 10.534 0.311 14.891 0.000 0.000 5.336 255.489 2938.024 140673.3442 0.657 0.654 0.660

75-78 1905-1981 375 0.611 6.061 290.184 0.201 9.624 0.304 14.556 0.000 0.000 5.552 265.831 2943.576 140939.1754 0.644 0.641 0.647

72-75 1829-1905 374 0.546 7.079 338.921 0.183 8.762 0.297 14.220 0.000 0.000 6.597 315.866 2950.173 141255.0414 0.576 0.573 0.579

* 67-72 1702-1829 373 0.437 14.630 700.470 0.263 12.593 0.480 22.983 2.397 114.750 11.49 550.144 2961.663 141805.1856 0.558 0.555 0.561

63-67 1600-1702 372 0.513 10.122 484.634 0.170 8.140 0.370 17.716 0.000 0.000 9.581 458.741 2971.244 142263.9263 0.539 0.536 0.542

60-63 1524-1600 371 0.387 9.545 457.033 0.103 4.932 0.269 12.880 0.000 0.000 9.169 439.014 2980.413 142702.9404 0.411 0.409 0.413

57-60 1448-1524 370 0.299 10.916 522.679 0.079 3.783 0.262 12.545 0.000 0.000 10.57 506.094 2990.983 143209.0347 0.321 0.319 0.323

53-57 1346-1448 369 0.090 18.914 905.612 0.062 2.969 0.339 16.231 0.000 0.000 18.51 886.264 3009.493 144095.2983 0.109 0.108 0.110

* 46-53 1168-1346 368 0.044 34.764 1664.516 0.031 1.484 0.064 3.064 0.819 39.221 33.85 1620.747 3043.343 145716.045 0.069 0.066 0.072

43-46 1092-1168 367 0.028 15.139 724.838 0.002 0.096 0.000 0.000 0.000 0.000 15.13 724.428 3058.473 146440.4733 0.029 0.028 0.030

37-43 940-1092 366 0.032 30.173 1444.703 0.004 0.192 0.000 0.000 0.000 0.000 30.16 1444.069 3088.633 147884.5418 0.032 0.030 0.034

* 25-37 635-940 365 0.022 60.954 2918.499 0.008 0.383 0.000 0.000 0.266 12.742 60.68 2905.374 3149.313 150789.9158 0.026 0.025 0.027

13-25 330-635 364 0.020 61.079 2924.466 0.008 0.383 0.000 0.000 0.000 0.000 61.05 2923.090 3210.363 153713.0055 0.02 0.019 0.021

* 0-13 0-330 363 0.008 66.963 3206.196 0.008 0.383 0.000 0.000 0.145 6.933 66.81 3198.880 3277.173 156911.8855 0.01 0.010 0.011

Results for RBHT Test 1582

Valid Time Period 2039 to 2100 seconds

Collapsed Liquid Level = 83.218 inches = 2113.74 mm

 (Zosv) Onset of Significant Void = 49.5 inches = 1257 mm

Table A-69 Data Results for RBHT Test 1582

C for Time Period 2039 to 2100 seconds
A-210

Table A-70 Energy Balance Results for RBHT Test 1582C for Time Period 2039 to 2100 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4649.5302 14.66727 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

0.25 6.35 4907.8374 15.48212 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

0.50 12.70 5166.1446 16.29697 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

0.75 19.05 5424.4519 17.11182 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

1.00 25.40 5682.7591 17.92667 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

1.25 31.75 5941.0663 18.74152 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

1.50 38.10 6199.3736 19.55637 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

1.75 44.45 6457.6808 20.37121 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

2.00 50.80 6715.988 21.18606 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

2.25 57.15 6974.2953 22.00091 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

2.50 63.50 7232.6025 22.81576 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

2.75 69.85 7490.9097 23.63061 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

3.00 76.20 7749.2169 24.44546 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

3.25 82.55 8007.5242 25.26031 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

3.50 88.90 8265.8314 26.07516 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

3.75 95.25 8524.1386 26.89 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

4.00 101.60 8782.4459 27.70485 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

4.25 107.95 9040.7531 28.5197 0.00E+00 0.00E+00 0.00E+00 1.20E-01 5.44E-02

4.50 114.30 9299.0603 29.33455 4.64E-03 6.64E-01 3.01E-01 1.19E-01 5.41E-02

4.75 120.65 9557.3676 30.1494 1.27E-02 1.82E+00 8.23E-01 1.18E-01 5.37E-02

5.00 127.00 9815.6748 30.96425 2.10E-02 3.00E+00 1.36E+00 1.17E-01 5.33E-02

5.25 133.35 10073.982 31.7791 2.95E-02 4.21E+00 1.91E+00 1.16E-01 5.28E-02

5.50 139.70 10332.289 32.59394 3.82E-02 5.46E+00 2.48E+00 1.15E-01 5.23E-02

5.75 146.05 10590.596 33.40879 4.71E-02 6.74E+00 3.06E+00 1.14E-01 5.18E-02

6.00 152.40 10848.904 34.22364 5.63E-02 8.05E+00 3.65E+00 1.13E-01 5.13E-02

6.25 158.75 11107.211 35.03849 6.56E-02 9.39E+00 4.26E+00 1.12E-01 5.08E-02

6.50 165.10 11365.518 35.85334 7.52E-02 1.08E+01 4.88E+00 1.11E-01 5.03E-02

6.75 171.45 11623.825 36.66819 8.50E-02 1.22E+01 5.52E+00 1.10E-01 4.98E-02

7.00 177.80 11882.133 37.48304 9.51E-02 1.36E+01 6.17E+00 1.09E-01 4.92E-02

7.25 184.15 12140.44 38.29788 1.05E-01 1.51E+01 6.83E+00 1.07E-01 4.87E-02

7.50 190.50 12398.747 39.11273 1.16E-01 1.66E+01 7.51E+00 1.06E-01 4.81E-02

7.75 196.85 12657.054 39.92758 1.27E-01 1.81E+01 8.21E+00 1.05E-01 4.75E-02

8.00 203.20 12915.362 40.74243 1.37E-01 1.97E+01 8.91E+00 1.03E-01 4.69E-02

8.25 209.55 13173.669 41.55728 1.49E-01 2.12E+01 9.63E+00 1.02E-01 4.63E-02

8.50 215.90 13431.976 42.37213 1.60E-01 2.29E+01 1.04E+01 1.01E-01 4.57E-02

8.75 222.25 13690.283 43.18698 1.72E-01 2.45E+01 1.11E+01 9.94E-02 4.51E-02

9.00 228.60 13948.591 44.00182 1.83E-01 2.62E+01 1.19E+01 9.79E-02 4.44E-02

9.25 234.95 13173.669 41.55728 1.95E-01 2.79E+01 1.26E+01 9.66E-02 4.38E-02

9.50 241.30 12398.747 39.11273 2.06E-01 2.94E+01 1.34E+01 9.52E-02 4.32E-02

9.75 247.65 11623.825 36.66819 2.16E-01 3.09E+01 1.40E+01 9.40E-02 4.26E-02

10.00 254.00 10848.904 34.22364 2.26E-01 3.23E+01 1.46E+01 9.29E-02 4.21E-02

10.25 260.35 10073.982 31.7791 2.35E-01 3.36E+01 1.52E+01 9.18E-02 4.16E-02

10.50 266.70 9299.0603 29.33455 2.43E-01 3.47E+01 1.58E+01 9.08E-02 4.12E-02

10.75 273.05 8524.1386 26.89 2.50E-01 3.58E+01 1.62E+01 8.99E-02 4.08E-02

11.00 279.40 7749.2169 24.44546 2.57E-01 3.68E+01 1.67E+01 8.91E-02 4.04E-02

11.25 285.75 6974.2953 22.00091 2.64E-01 3.77E+01 1.71E+01 8.83E-02 4.01E-02

11.50 292.10 6199.3736 19.55637 2.69E-01 3.85E+01 1.75E+01 8.76E-02 3.97E-02

11.75 298.45 5424.4519 17.11182 2.74E-01 3.92E+01 1.78E+01 8.70E-02 3.95E-02

12.00 304.80 4649.5302 14.66727 2.79E-01 3.98E+01 1.81E+01 8.65E-02 3.92E-02

Results for RBHT Test 1582

Valid Time Period 2039 to 2100 seconds
A-211

Figure A-175 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582C for Time Period 2039 to 2100 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-212

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-D 

Test Conditions

Date: 6/11/2003

Steady-state time window: 2231 – 2291 seconds

Inlet flow rate: 2.868 cm/sec (1.129 in./sec) 

Inlet mass flow rate: 0.145 kg/sec (0.319 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-213

Figure A-176 Inlet Flow Plot for Experiment 1582D 

Figure A-177 Inlet Temperature Plot for Experiment 1582D 
A-214

Figure A-178 System Pressure Plot for Experiment 1582D 

Figure A-179 Bundle Power Plot for Experiment 1582D 
A-215

Table A-71: Data Results for RBHT Test 1582 for Time Period 2231 to 2291 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.838 9.280 444.352 1.692 81.013 0.515 24.658 0.000 0.000 7.07 338.513 2887.07 138233.6536 0.876 0.872 0.880

* 120-133 3048-3378 383 0.794 13.892 665.160 1.848 88.483 0.920 44.050 2.578 123.443 8.546 409.185 2895.616 138642.8383 0.873 0.869 0.877

* 108-120 2743-3048 382 0.750 15.590 746.471 1.504 72.012 1.148 54.967 4.697 224.912 8.241 394.581 2903.857 139037.4195 0.868 0.864 0.872

100-108 2540-2743 381 0.824 7.328 350.856 0.873 41.799 0.840 40.219 0.000 0.000 5.612 268.704 2909.469 139306.1235 0.865 0.861 0.869

97-100 2464-2540 380 0.774 3.516 168.341 0.299 14.316 0.304 14.556 0.000 0.000 2.911 139.379 2912.38 139445.5029 0.813 0.809 0.817

93-97 2362-2464 379 0.775 4.679 224.041 0.376 18.003 0.396 18.961 0.000 0.000 3.906 187.020 2916.286 139632.5232 0.812 0.808 0.816

* 85-93 2159-2362 378 0.618 15.892 760.893 0.673 32.223 0.760 36.389 6.376 305.265 8.083 387.016 2924.369 140019.5393 0.805 0.801 0.809

81-85 2057-2159 377 0.767 4.840 231.749 0.297 14.220 0.364 17.428 0.000 0.000 4.177 199.996 2928.546 140219.5351 0.799 0.795 0.80378-81 1981-2057 376 0.659 5.313 254.377 0.206 9.863 0.266 12.736 0.000 0.000 4.839 231.693 2933.385 140451.2277 0.689 0.686 0.69275-78 1905-1981 375 0.652 5.427 259.848 0.191 9.145 0.260 12.449 0.000 0.000 4.971 238.013 2938.356 140689.2404 0.681 0.678 0.68472-75 1829-1905 374 0.604 6.164 295.157 0.177 8.475 0.254 12.162 0.000 0.000 5.732 274.450 2944.088 140963.6901 0.632 0.629 0.635

* 67-72 1702-1829 373 0.472 13.716 656.706 0.261 12.497 0.410 19.631 3.345 160.140 9.7 464.438 2953.788 141428.1286 0.626 0.623 0.629

63-67 1600-1702 372 0.597 8.377 401.085 0.179 8.571 0.316 15.130 0.000 0.000 7.877 377.153 2961.665 141805.2813 0.621 0.618 0.62460-63 1524-1600 371 0.466 8.320 398.350 0.116 5.554 0.230 11.012 0.000 0.000 7.973 381.749 2969.638 142187.0306 0.488 0.486 0.49057-60 1448-1524 370 0.422 9.010 431.422 0.099 4.740 0.224 10.725 0.000 0.000 8.684 415.792 2978.322 142602.8228 0.442 0.440 0.44453-57 1346-1448 369 0.298 14.593 698.729 0.105 5.027 0.290 13.885 0.000 0.000 14.19 679.421 2992.512 143282.2436 0.317 0.315 0.319

* 46-53 1168-1346 368 0.097 32.843 1572.513 0.099 4.740 0.466 22.312 2.308 110.489 29.97 1434.971 3022.482 144717.2149 0.175 0.174 0.176

43-46 1092-1168 367 0.034 15.050 720.611 0.001 0.048 0.000 0.000 0.000 0.000 15.05 720.598 3037.532 145437.8128 0.034 0.032 0.03637-43 940-1092 366 0.035 30.064 1439.481 0.003 0.144 0.000 0.000 0.000 0.000 30.05 1438.802 3067.582 146876.6145 0.035 0.033 0.037

* 25-37 635-940 365 0.025 60.757 2909.050 0.006 0.287 0.000 0.000 0.221 10.570 60.53 2898.192 3128.112 149774.8065 0.028 0.027 0.029

13-25 330-635 364 0.022 60.975 2919.493 0.006 0.287 0.000 0.000 0.000 0.000 60.95 2918.302 3189.062 152693.1081 0.022 0.021 0.023

* 0-13 0-330 363 0.009 66.906 3203.461 0.006 0.287 0.000 0.000 0.140 6.687 66.76 3196.486 3255.822 155889.5941 0.011 0.010 0.012

Results for RBHT Test 1582

Valid Time Period 2231 to 2291 seconds

Collapsed Liquid Level = 77.746 inches = 1974.76 mm

 (Zosv) Onset of Significant Void = 49.5 inches = 1257 mm

Table A-71 Data Results for RBHT Test 1582

D for Time Period 2231 to 2291 seconds
A-216

Table A-72 Energy Balance Results for RBHT Test 1582D for Time Period 2231 to 2291 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4655.5135 14.68615 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

0.25 6.35 4914.1531 15.50205 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

0.50 12.70 5172.7928 16.31794 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

0.75 19.05 5431.4324 17.13384 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

1.00 25.40 5690.0721 17.94974 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

1.25 31.75 5948.7117 18.76564 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

1.50 38.10 6207.3513 19.58153 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

1.75 44.45 6465.991 20.39743 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

2.00 50.80 6724.6306 21.21333 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

2.25 57.15 6983.2702 22.02922 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

2.50 63.50 7241.9099 22.84512 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

2.75 69.85 7500.5495 23.66102 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

3.00 76.20 7759.1892 24.47692 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

3.25 82.55 8017.8288 25.29281 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

3.50 88.90 8276.4684 26.10871 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

3.75 95.25 8535.1081 26.92461 0.00E+00 0.00E+00 0.00E+00 1.02E-01 4.65E-02

4.00 101.60 8793.7477 27.7405 5.16E-03 6.30E-01 2.86E-01 1.02E-01 4.62E-02

4.25 107.95 9052.3874 28.5564 1.41E-02 1.72E+00 7.80E-01 1.01E-01 4.58E-02

4.50 114.30 9311.027 29.3723 2.33E-02 2.84E+00 1.29E+00 1.00E-01 4.54E-02

4.75 120.65 9569.6666 30.1882 3.27E-02 3.99E+00 1.81E+00 9.91E-02 4.49E-02

5.00 127.00 9828.3063 31.00409 4.24E-02 5.18E+00 2.35E+00 9.81E-02 4.45E-02

5.25 133.35 10086.946 31.81999 5.24E-02 6.40E+00 2.90E+00 9.71E-02 4.40E-02

5.50 139.70 10345.586 32.63589 6.26E-02 7.64E+00 3.47E+00 9.60E-02 4.35E-02

5.75 146.05 10604.225 33.45179 7.30E-02 8.92E+00 4.05E+00 9.49E-02 4.31E-02

6.00 152.40 10862.865 34.26768 8.38E-02 1.02E+01 4.64E+00 9.38E-02 4.26E-02

6.25 158.75 11121.504 35.08358 9.48E-02 1.16E+01 5.25E+00 9.27E-02 4.21E-02

6.50 165.10 11380.144 35.89948 1.06E-01 1.29E+01 5.87E+00 9.16E-02 4.15E-02

6.75 171.45 11638.784 36.71537 1.18E-01 1.44E+01 6.51E+00 9.04E-02 4.10E-02

7.00 177.80 11897.423 37.53127 1.29E-01 1.58E+01 7.17E+00 8.92E-02 4.04E-02

7.25 184.15 12156.063 38.34717 1.41E-01 1.73E+01 7.83E+00 8.79E-02 3.99E-02

7.50 190.50 12414.703 39.16307 1.54E-01 1.88E+01 8.51E+00 8.67E-02 3.93E-02

7.75 196.85 12673.342 39.97896 1.66E-01 2.03E+01 9.20E+00 8.54E-02 3.87E-02

8.00 203.20 12931.982 40.79486 1.79E-01 2.19E+01 9.91E+00 8.41E-02 3.81E-02

8.25 209.55 13190.622 41.61076 1.92E-01 2.35E+01 1.06E+01 8.28E-02 3.75E-02

8.50 215.90 13449.261 42.42665 2.05E-01 2.51E+01 1.14E+01 8.14E-02 3.69E-02

8.75 222.25 13707.901 43.24255 2.19E-01 2.67E+01 1.21E+01 8.00E-02 3.63E-02

9.00 228.60 13966.54 44.05845 2.33E-01 2.84E+01 1.29E+01 7.86E-02 3.56E-02

9.25 234.95 13190.622 41.61076 2.46E-01 3.01E+01 1.36E+01 7.72E-02 3.50E-02

9.50 241.30 12414.703 39.16307 2.59E-01 3.17E+01 1.44E+01 7.59E-02 3.44E-02

9.75 247.65 11638.784 36.71537 2.71E-01 3.31E+01 1.50E+01 7.47E-02 3.39E-02

10.00 254.00 10862.865 34.26768 2.82E-01 3.45E+01 1.56E+01 7.35E-02 3.33E-02

10.25 260.35 10086.946 31.81999 2.93E-01 3.58E+01 1.62E+01 7.24E-02 3.29E-02

10.50 266.70 9311.027 29.3723 3.03E-01 3.70E+01 1.68E+01 7.14E-02 3.24E-02

10.75 273.05 8535.1081 26.92461 3.11E-01 3.80E+01 1.73E+01 7.05E-02 3.20E-02

11.00 279.40 7759.1892 24.47692 3.20E-01 3.90E+01 1.77E+01 6.97E-02 3.16E-02

11.25 285.75 6983.2702 22.02922 3.27E-01 3.99E+01 1.81E+01 6.89E-02 3.13E-02

11.50 292.10 6207.3513 19.58153 3.34E-01 4.08E+01 1.85E+01 6.83E-02 3.10E-02

11.75 298.45 5431.4324 17.13384 3.39E-01 4.15E+01 1.88E+01 6.77E-02 3.07E-02

12.00 304.80 4655.5135 14.68615 3.44E-01 4.21E+01 1.91E+01 6.71E-02 3.05E-02

Results for RBHT Test 1582

Valid Time Period 2231 to 2291 seconds
A-217

Figure A-180 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582D for Time Period 2231 to 2291 seconds 

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-218

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-E

Test Conditions

Date: 6/11/2003

Steady-state time window: 2430 – 2490 seconds

Inlet flow rate: 2.535 cm/sec (0.998 in./sec) 

Inlet mass flow rate: 0.121 kg/sec (0.267 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-219

Figure A-181 Inlet Flow Plot for Experiment 1582E 

Figure A-182 Inlet Temperature Plot for Experiment 1582E 
A-220

Figure A-183 System Pressure Plot for Experiment 1582E 

Figure A-184 Bundle Power Plot for Experiment 1582E 
A-221

Table A-73: Data Results for RBHT Test 1582 for Time Period 2430 to 2490 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.862 7.878 377.214 1.465 70.145 0.431 20.636 0.000 0.000 5.979 286.276 2886 138181.4162 0.895 0.891 0.899

* 120-133 3048-3378 383 0.817 12.355 591.557 1.601 76.656 0.770 36.868 2.673 127.981 7.311 350.053 2893.3 138531.4688 0.892 0.888 0.896

* 108-120 2743-3048 382 0.776 13.980 669.387 1.306 62.532 0.961 46.013 4.513 216.105 7.2 344.738 2900.5 138876.2066 0.884 0.880 0.888

100-108 2540-2743 381 0.846 6.419 307.341 0.761 36.437 0.703 33.660 0.000 0.000 4.951 237.055 2905.4 139113.2618 0.881 0.877 0.885

97-100 2464-2540 380 0.802 3.090 147.951 0.262 12.545 0.254 12.162 0.000 0.000 2.572 123.148 2908 139236.4098 0.835 0.831 0.839

93-97 2362-2464 379 0.799 4.181 200.170 0.329 15.753 0.332 15.896 0.000 0.000 3.52 168.539 2911.5 139404.9483 0.831 0.827 0.835

* 85-93 2159-2362 378 0.653 14.401 689.529 0.594 28.441 0.636 30.452 5.921 283.504 7.25 347.132 2918.8 139752.0802 0.825 0.821 0.829

81-85 2057-2159 377 0.793 4.300 205.889 0.265 12.688 0.305 14.603 0.000 0.000 3.731 178.641 2922.5 139930.7214 0.82 0.816 0.824

78-81 1981-2057 376 0.695 4.752 227.522 0.185 8.858 0.223 10.677 0.000 0.000 4.344 207.992 2926.9 140138.7132 0.721 0.717 0.725

75-78 1905-1981 375 0.693 4.783 229.014 0.173 8.283 0.218 10.438 0.000 0.000 4.389 210.146 2931.2 140348.8597 0.718 0.714 0.722

72-75 1829-1905 374 0.661 5.276 252.637 0.162 7.757 0.213 10.198 0.000 0.000 4.902 234.709 2936.1 140583.5687 0.685 0.682 0.688

* 67-72 1702-1829 373 0.514 12.615 603.990 0.244 11.683 0.343 16.423 4.025 192.699 8.003 383.186 2944.2 140966.7544 0.692 0.689 0.695

63-67 1600-1702 372 0.677 6.710 321.266 0.171 8.188 0.265 12.688 0.000 0.000 6.269 300.161 2950.4 141266.9157 0.698 0.695 0.701

60-63 1524-1600 371 0.558 6.892 329.969 0.115 5.506 0.193 9.241 0.000 0.000 6.581 315.100 2957 141582.0157 0.577 0.574 0.580

57-60 1448-1524 370 0.515 7.561 362.046 0.103 4.932 0.188 9.001 0.000 0.000 7.267 347.946 2964.3 141929.9615 0.533 0.530 0.536

53-57 1346-1448 369 0.437 11.701 560.226 0.118 5.650 0.243 11.635 0.000 0.000 11.34 542.962 2975.6 142472.9237 0.454 0.452 0.456

* 46-53 1168-1346 368 0.271 26.496 1268.653 0.150 7.182 0.403 19.296 0.893 42.775 25.05 1199.400 3000.7 143672.3241 0.311 0.309 0.313

43-46 1092-1168 367 0.154 13.181 631.094 0.038 1.819 0.164 7.852 0.000 0.000 12.97 621.007 3013.6 144293.331 0.167 0.166 0.168

37-43 940-1092 366 0.054 29.467 1410.885 0.037 1.772 0.149 7.134 0.000 0.000 29.27 1401.455 3042.9 145694.7861 0.06 0.057 0.063

* 25-37 635-940 365 0.029 60.497 2896.617 0.004 0.192 0.000 0.000 0.803 38.453 59.69 2857.973 3102.6 148552.7587 0.042 0.040 0.044

13-25 330-635 364 0.024 60.855 2913.774 0.004 0.192 0.000 0.000 0.000 0.000 60.83 2912.556 3163.4 151465.3147 0.024 0.023 0.025

* 0-13 0-330 363 0.010 66.854 3200.974 0.004 0.192 0.000 0.000 0.150 7.169 66.7 3193.613 3230.1 154658.9279 0.012 0.011 0.013

Results for RBHT Test 1582

Valid Time Period 2430 to 2490 seconds

Collapsed Liquid Level = 72.467 inches = 1840.65 mm

 (Zosv) Onset of Significant Void = 40 inches = 1016 mm

Table A-73 Data Results for RBHT Test 1582

E for Time Period 2430 to 2490 seconds
A-222

Table A-74 Energy Balance Results for RBHT Test 1582E for Time Period 2430 to 2490 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4657.9468 14.69383 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.25 6.35 4916.7216 15.51015 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.50 12.70 5175.4964 16.32647 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.75 19.05 5434.2712 17.1428 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.00 25.40 5693.0461 17.95912 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.25 31.75 5951.8209 18.77544 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.50 38.10 6210.5957 19.59177 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.75 44.45 6469.3705 20.40809 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.00 50.80 6728.1453 21.22441 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.25 57.15 6986.9202 22.04074 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.50 63.50 7245.695 22.85706 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.75 69.85 7504.4698 23.67339 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.00 76.20 7763.2446 24.48971 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.25 82.55 8022.0195 25.30603 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.50 88.90 8280.7943 26.12236 5.89E-03 6.02E-01 2.73E-01 8.52E-02 3.86E-02

3.75 95.25 8539.5691 26.93868 1.59E-02 1.63E+00 7.39E-01 8.43E-02 3.83E-02

4.00 101.60 8798.3439 27.755 2.63E-02 2.69E+00 1.22E+00 8.35E-02 3.79E-02

4.25 107.95 9057.1187 28.57133 3.70E-02 3.78E+00 1.71E+00 8.25E-02 3.74E-02

4.50 114.30 9315.8936 29.38765 4.79E-02 4.90E+00 2.22E+00 8.16E-02 3.70E-02

4.75 120.65 9574.6684 30.20397 5.92E-02 6.05E+00 2.75E+00 8.06E-02 3.66E-02

5.00 127.00 9833.4432 31.0203 7.08E-02 7.24E+00 3.28E+00 7.96E-02 3.61E-02

5.25 133.35 10092.218 31.83662 8.27E-02 8.45E+00 3.83E+00 7.86E-02 3.57E-02

5.50 139.70 10350.993 32.65295 9.49E-02 9.70E+00 4.40E+00 7.76E-02 3.52E-02

5.75 146.05 10609.768 33.46927 1.07E-01 1.10E+01 4.98E+00 7.65E-02 3.47E-02

6.00 152.40 10868.542 34.28559 1.20E-01 1.23E+01 5.58E+00 7.54E-02 3.42E-02

6.25 158.75 11127.317 35.10192 1.33E-01 1.36E+01 6.18E+00 7.43E-02 3.37E-02

6.50 165.10 11386.092 35.91824 1.47E-01 1.50E+01 6.81E+00 7.31E-02 3.32E-02

6.75 171.45 11644.867 36.73456 1.61E-01 1.64E+01 7.45E+00 7.19E-02 3.26E-02

7.00 177.80 11903.642 37.55089 1.75E-01 1.79E+01 8.10E+00 7.07E-02 3.21E-02

7.25 184.15 12162.417 38.36721 1.89E-01 1.93E+01 8.77E+00 6.95E-02 3.15E-02

7.50 190.50 12421.191 39.18353 2.04E-01 2.08E+01 9.44E+00 6.83E-02 3.10E-02

7.75 196.85 12679.966 39.99986 2.19E-01 2.24E+01 1.01E+01 6.70E-02 3.04E-02

8.00 203.20 12938.741 40.81618 2.34E-01 2.39E+01 1.08E+01 6.57E-02 2.98E-02

8.25 209.55 13197.516 41.63251 2.50E-01 2.55E+01 1.16E+01 6.43E-02 2.92E-02

8.50 215.90 13456.291 42.44883 2.66E-01 2.71E+01 1.23E+01 6.29E-02 2.86E-02

8.75 222.25 13715.066 43.26515 2.82E-01 2.88E+01 1.31E+01 6.16E-02 2.79E-02

9.00 228.60 13973.84 44.08148 2.98E-01 3.05E+01 1.38E+01 6.01E-02 2.73E-02

9.25 234.95 13197.516 41.63251 3.15E-01 3.22E+01 1.46E+01 5.87E-02 2.66E-02

9.50 241.30 12421.191 39.18353 3.30E-01 3.37E+01 1.53E+01 5.74E-02 2.61E-02

9.75 247.65 11644.867 36.73456 3.44E-01 3.52E+01 1.60E+01 5.62E-02 2.55E-02

10.00 254.00 10868.542 34.28559 3.58E-01 3.66E+01 1.66E+01 5.51E-02 2.50E-02

10.25 260.35 10092.218 31.83662 3.70E-01 3.78E+01 1.72E+01 5.40E-02 2.45E-02

10.50 266.70 9315.8936 29.38765 3.82E-01 3.90E+01 1.77E+01 5.30E-02 2.40E-02

10.75 273.05 8539.5691 26.93868 3.93E-01 4.01E+01 1.82E+01 5.21E-02 2.36E-02

11.00 279.40 7763.2446 24.48971 4.02E-01 4.11E+01 1.86E+01 5.12E-02 2.32E-02

11.25 285.75 6986.9202 22.04074 4.11E-01 4.20E+01 1.91E+01 5.05E-02 2.29E-02

11.50 292.10 6210.5957 19.59177 4.19E-01 4.28E+01 1.94E+01 4.98E-02 2.26E-02

11.75 298.45 5434.2712 17.1428 4.26E-01 4.35E+01 1.97E+01 4.92E-02 2.23E-02

12.00 304.80 4657.9468 14.69383 4.32E-01 4.41E+01 2.00E+01 4.87E-02 2.21E-02

Results for RBHT Test 1582

Valid Time Period 2430 to 2490 seconds
A-223

Figure A-185 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582E for Time Period 2430 to 2490 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-224

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-F 

Test Conditions

Date: 6/11/2003

Steady-state time window: 2630 – 2690 seconds

Inlet flow rate: 2.03 cm/sec (0.800 in./sec) 

Inlet mass flow rate: 0.097 kg/sec (0.214 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-225

Figure A-186 Inlet Flow Plot for Experiment 1582F 

Figure A-187 Inlet Temperature Plot for Experiment 1582F 
A-226

Figure A-188 System Pressure Plot for Experiment 1582F 

Figure A-189 Bundle Power Plot for Experiment 1582F 
A-227

Table A-75: Data Results for RBHT Test 1582 for Time Period 2630 to 2690 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.893 6.133 293.665 1.223 58.558 0.346 16.567 0.000 0.000 4.563 218.478 2884.563 138113.6178 0.92 0.915 0.925

* 120-133 3048-3378 383 0.844 10.563 505.770 1.337 64.016 0.618 29.590 2.896 138.672 5.712 273.492 2890.275 138387.1098 0.915 0.910 0.920

* 108-120 2743-3048 382 0.808 11.955 572.411 1.091 52.237 0.771 36.916 4.231 202.584 5.862 280.674 2896.137 138667.7839 0.906 0.901 0.911

100-108 2540-2743 381 0.872 5.308 254.128 0.636 30.452 0.564 27.004 0.000 0.000 4.104 196.501 2900.241 138864.2844 0.901 0.896 0.906

97-100 2464-2540 380 0.836 2.560 122.588 0.219 10.486 0.204 9.768 0.000 0.000 2.138 102.368 2902.379 138966.6524 0.863 0.859 0.867

93-97 2362-2464 379 0.829 3.547 169.833 0.277 13.263 0.266 12.736 0.000 0.000 3.005 143.880 2905.384 139110.5326 0.855 0.851 0.859

* 85-93 2159-2362 378 0.700 12.469 597.028 0.501 23.988 0.511 24.467 5.321 254.780 6.136 293.793 2911.52 139404.3259 0.852 0.848 0.856

81-85 2057-2159 377 0.827 3.604 172.569 0.225 10.773 0.245 11.731 0.000 0.000 3.131 149.913 2914.651 139554.2389 0.849 0.845 0.85378-81 1981-2057 376 0.733 4.160 199.175 0.158 7.565 0.179 8.571 0.000 0.000 3.822 182.998 2918.473 139737.2373 0.755 0.751 0.75975-78 1905-1981 375 0.740 4.056 194.202 0.149 7.134 0.175 8.379 0.000 0.000 3.73 178.593 2922.203 139915.8306 0.761 0.757 0.76572-75 1829-1905 374 0.719 4.378 209.619 0.140 6.703 0.171 8.188 0.000 0.000 4.064 194.585 2926.267 140110.416 0.739 0.735 0.743

* 67-72 1702-1829 373 0.574 11.051 529.144 0.213 10.198 0.276 13.215 4.042 193.551 6.52 312.179 2932.787 140422.5953 0.749 0.745 0.753

63-67 1600-1702 372 0.741 5.380 257.610 0.153 7.326 0.213 10.198 0.000 0.000 5.013 240.024 2937.8 140662.619 0.759 0.755 0.76360-63 1524-1600 371 0.644 5.546 265.567 0.104 4.980 0.155 7.421 0.000 0.000 5.285 253.047 2943.085 140915.6662 0.661 0.658 0.66457-60 1448-1524 370 0.617 5.967 285.708 0.095 4.549 0.151 7.230 0.000 0.000 5.718 273.779 2948.803 141189.4455 0.633 0.630 0.63653-57 1346-1448 369 0.541 9.535 456.536 0.114 5.458 0.195 9.337 0.000 0.000 9.225 441.695 2958.028 141631.1409 0.556 0.553 0.559

* 46-53 1168-1346 368 0.380 22.539 1079.176 0.160 7.661 0.323 15.465 3.936 188.459 18.12 867.590 2976.148 142498.7311 0.501 0.498 0.504

43-46 1092-1168 367 0.435 8.803 421.475 0.052 2.490 0.132 6.320 0.000 0.000 8.616 412.536 2984.764 142911.2674 0.447 0.445 0.44937-43 940-1092 366 0.276 22.560 1080.170 0.073 3.495 0.252 12.066 0.000 0.000 22.23 1064.378 3006.994 143975.6455 0.286 0.285 0.287

* 25-37 635-940 365 0.040 59.843 2865.286 0.061 2.921 0.135 6.464 7.097 339.794 52.55 2516.108 3059.544 146491.753 0.157 0.156 0.158

13-25 330-635 364 0.027 60.658 2904.325 0.003 0.144 0.000 0.000 0.000 0.000 60.64 2903.459 3120.184 149395.2118 0.027 0.026 0.028

* 0-13 0-330 363 0.011 66.776 3197.244 0.003 0.144 0.000 0.000 0.183 8.754 66.59 3188.346 3186.774 152583.5581 0.013 0.012 0.014

Results for RBHT Test 1582

Valid Time Period 2630 to 2690 seconds

Collapsed Liquid Level = 65.896 inches = 1673.75 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-75 Data Results for RBHT Test 1582

F for Time Period 2630 to 2690 seconds
A-228

Table A-76 Energy Balance Results for RBHT Test 1582F for Time Period 2630 to 2690 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4661.0209 14.70352 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

0.25 6.35 4919.9665 15.52039 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

0.50 12.70 5178.9121 16.33725 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

0.75 19.05 5437.8577 17.15411 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

1.00 25.40 5696.8033 17.97097 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

1.25 31.75 5955.7489 18.78784 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

1.50 38.10 6214.6945 19.6047 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

1.75 44.45 6473.6401 20.42156 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

2.00 50.80 6732.5857 21.23842 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

2.25 57.15 6991.5313 22.05528 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

2.50 63.50 7250.4769 22.87215 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

2.75 69.85 7509.4225 23.68901 0.00E+00 0.00E+00 0.00E+00 6.87E-02 3.12E-02

3.00 76.20 7768.3681 24.50587 9.11E-03 7.47E-01 3.39E-01 6.81E-02 3.09E-02

3.25 82.55 8027.3138 25.32273 2.09E-02 1.71E+00 7.76E-01 6.73E-02 3.05E-02

3.50 88.90 8286.2594 26.1396 3.30E-02 2.71E+00 1.23E+00 6.64E-02 3.01E-02

3.75 95.25 8545.205 26.95646 4.56E-02 3.74E+00 1.69E+00 6.56E-02 2.97E-02

4.00 101.60 8804.1506 27.77332 5.85E-02 4.80E+00 2.18E+00 6.47E-02 2.93E-02

4.25 107.95 9063.0962 28.59018 7.18E-02 5.89E+00 2.67E+00 6.38E-02 2.89E-02

4.50 114.30 9322.0418 29.40705 8.55E-02 7.01E+00 3.18E+00 6.28E-02 2.85E-02

4.75 120.65 9580.9874 30.22391 9.96E-02 8.16E+00 3.70E+00 6.19E-02 2.81E-02

5.00 127.00 9839.933 31.04077 1.14E-01 9.35E+00 4.24E+00 6.09E-02 2.76E-02

5.25 133.35 10098.879 31.85763 1.29E-01 1.06E+01 4.79E+00 5.99E-02 2.72E-02

5.50 139.70 10357.824 32.6745 1.44E-01 1.18E+01 5.36E+00 5.88E-02 2.67E-02

5.75 146.05 10616.77 33.49136 1.60E-01 1.31E+01 5.94E+00 5.77E-02 2.62E-02

6.00 152.40 10875.715 34.30822 1.76E-01 1.44E+01 6.54E+00 5.66E-02 2.57E-02

6.25 158.75 11134.661 35.12508 1.92E-01 1.58E+01 7.15E+00 5.55E-02 2.52E-02

6.50 165.10 11393.607 35.94195 2.09E-01 1.71E+01 7.77E+00 5.44E-02 2.47E-02

6.75 171.45 11652.552 36.75881 2.26E-01 1.85E+01 8.41E+00 5.32E-02 2.41E-02

7.00 177.80 11911.498 37.57567 2.44E-01 2.00E+01 9.06E+00 5.20E-02 2.36E-02

7.25 184.15 12170.443 38.39253 2.62E-01 2.14E+01 9.73E+00 5.07E-02 2.30E-02

7.50 190.50 12429.389 39.20939 2.80E-01 2.30E+01 1.04E+01 4.95E-02 2.24E-02

7.75 196.85 12688.335 40.02626 2.99E-01 2.45E+01 1.11E+01 4.82E-02 2.19E-02

8.00 203.20 12947.28 40.84312 3.18E-01 2.61E+01 1.18E+01 4.69E-02 2.13E-02

8.25 209.55 13206.226 41.65998 3.37E-01 2.77E+01 1.25E+01 4.55E-02 2.07E-02

8.50 215.90 13465.171 42.47684 3.57E-01 2.93E+01 1.33E+01 4.42E-02 2.00E-02

8.75 222.25 13724.117 43.29371 3.77E-01 3.09E+01 1.40E+01 4.28E-02 1.94E-02

9.00 228.60 13983.063 44.11057 3.98E-01 3.26E+01 1.48E+01 4.14E-02 1.88E-02

9.25 234.95 13206.226 41.65998 4.18E-01 3.43E+01 1.56E+01 4.00E-02 1.81E-02

9.50 241.30 12429.389 39.20939 4.37E-01 3.59E+01 1.63E+01 3.87E-02 1.75E-02

9.75 247.65 11652.552 36.75881 4.55E-01 3.73E+01 1.69E+01 3.74E-02 1.70E-02

10.00 254.00 10875.715 34.30822 4.72E-01 3.87E+01 1.76E+01 3.63E-02 1.65E-02

10.25 260.35 10098.879 31.85763 4.88E-01 4.00E+01 1.81E+01 3.52E-02 1.60E-02

10.50 266.70 9322.0418 29.40705 5.02E-01 4.12E+01 1.87E+01 3.42E-02 1.55E-02

10.75 273.05 8545.205 26.95646 5.16E-01 4.23E+01 1.92E+01 3.33E-02 1.51E-02

11.00 279.40 7768.3681 24.50587 5.28E-01 4.33E+01 1.96E+01 3.25E-02 1.47E-02

11.25 285.75 6991.5313 22.05528 5.39E-01 4.42E+01 2.00E+01 3.17E-02 1.44E-02

11.50 292.10 6214.6945 19.6047 5.49E-01 4.50E+01 2.04E+01 3.10E-02 1.41E-02

11.75 298.45 5437.8577 17.15411 5.57E-01 4.57E+01 2.07E+01 3.04E-02 1.38E-02

12.00 304.80 4661.0209 14.70352 5.65E-01 4.63E+01 2.10E+01 2.99E-02 1.36E-02

Results for RBHT Test 1582

Valid Time Period 2630 to 2690 seconds
A-229

Figure A-190 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582F for Time Period 2630 to 2690 seconds 

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-230

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-G 

Test Conditions

Date: 6/11/2003

Steady-state time window: 2822 – 2894 seconds

Inlet flow rate: 1.534 cm/sec (0.604 in./sec) 

Inlet mass flow rate: 0.0735 kg/sec (0.162 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-231

Figure A-191 Inlet Flow Plot for Experiment 1582G 

Figure A-192 Inlet Temperature Plot for Experiment 1582G 
A-232

Figure A-193 System Pressure Plot for Experiment 1582G 

Figure A-194 Bundle Power Plot for Experiment 1582G 
A-233

Table A-77: Data Results for RBHT Test 1582 for Time Period 2822 to 2894 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.923 4.393 210.315 0.960 45.941 0.261 12.511 0.000 0.000 3.17 151.780 2883.17 138046.9206 0.945 0.940 0.949

* 120-133 3048-3378 383 0.865 9.145 437.862 1.054 50.466 0.467 22.336 3.452 165.303 4.172 199.756 2887.342 138246.677 0.938 0.934 0.943

* 108-120 2743-3048 382 0.834 10.325 494.382 0.862 41.287 0.582 27.881 4.245 203.241 4.636 221.973 2891.978 138468.6499 0.926 0.921 0.930

100-108 2540-2743 381 0.897 4.283 205.068 0.504 24.112 0.426 20.392 0.000 0.000 3.352 160.495 2895.33 138629.1445 0.919 0.915 0.924

97-100 2464-2540 380 0.867 2.072 99.215 0.174 8.312 0.154 7.383 0.000 0.000 1.744 83.503 2897.074 138712.6477 0.888 0.884 0.892

93-97 2362-2464 379 0.860 2.906 139.149 0.219 10.486 0.201 9.614 0.000 0.000 2.485 118.982 2899.559 138831.6301 0.880 0.876 0.885

* 85-93 2159-2362 378 0.741 10.762 515.294 0.397 19.023 0.386 18.458 4.990 238.939 4.989 238.875 2904.548 139070.5047 0.880 0.876 0.884

81-85 2057-2159 377 0.862 2.868 137.334 0.126 6.028 0.185 8.843 0.000 0.000 2.504 119.892 2907.052 139190.3969 0.879 0.875 0.88478-81 1981-2057 376 0.771 3.562 170.555 0.179 8.566 0.135 6.464 0.000 0.000 3.3 158.005 2910.352 139348.4017 0.803 0.799 0.80775-78 1905-1981 375 0.787 3.322 159.067 0.125 5.980 0.132 6.315 0.000 0.000 3.07 146.992 2913.422 139495.3941 0.792 0.788 0.79672-75 1829-1905 374 0.761 3.724 178.313 0.112 5.372 0.129 6.172 0.000 0.000 3.482 166.719 2916.904 139662.1132 0.788 0.784 0.792

* 67-72 1702-1829 373 0.624 9.767 467.626 0.119 5.698 0.208 9.964 3.840 183.883 5.599 268.082 2922.503 139930.1947 0.784 0.780 0.788

63-67 1600-1702 372 0.778 4.602 220.361 0.086 4.131 0.160 7.680 0.000 0.000 4.316 206.651 2926.819 140136.8459 0.776 0.773 0.78060-63 1524-1600 371 0.691 4.811 230.332 0.172 8.250 0.117 5.592 0.000 0.000 4.606 220.536 2931.425 140357.3824 0.706 0.702 0.70957-60 1448-1524 370 0.693 4.776 228.691 0.080 3.831 0.114 5.444 0.000 0.000 4.581 219.339 2936.006 140576.7218 0.704 0.701 0.70853-57 1346-1448 369 0.628 7.725 369.879 0.097 4.647 0.147 7.034 0.000 0.000 7.479 358.096 2943.485 140934.8183 0.640 0.637 0.643

* 46-53 1168-1346 368 0.445 20.186 966.509 0.144 6.876 0.244 11.688 4.458 213.462 15.34 734.483 2958.825 141669.3014 0.578 0.575 0.581

43-46 1092-1168 367 0.506 7.690 368.213 0.051 2.444 0.100 4.767 0.000 0.000 7.537 360.873 2966.362 142030.1749 0.516 0.514 0.51937-43 940-1092 366 0.481 16.179 774.644 0.083 3.970 0.190 9.097 0.000 0.000 15.9 761.296 2982.262 142791.471 0.490 0.487 0.492

* 25-37 635-940 365 0.192 50.365 2411.510 0.088 4.212 0.302 14.455 3.936 188.436 46.04 2204.407 3028.302 144995.878 0.261 0.260 0.262

13-25 330-635 364 0.032 60.301 2887.217 0.001 0.068 0.000 0.000 0.000 0.000 60.28 2886.222 3088.582 147882.0999 0.032 0.031 0.034

* 0-13 0-330 363 0.012 66.670 3192.196 0.002 0.074 0.000 0.000 0.269 12.873 66.4 3179.249 3154.982 151061.349 0.016 0.015 0.017

Results for RBHT Test 1582

Valid Time Period 2822 to 2894 seconds

Collapsed Liquid Level = 58.445 inches = 1484.51 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-77 Data Results for RBHT Test 1582

G for Time Period 2822 to 2894 seconds
A-234

Table A-78 Energy Balance Results for RBHT Test 1582G for Time Period 2822 to 2894 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4659.2785 14.69803 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

0.25 6.35 4918.1273 15.51458 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

0.50 12.70 5176.9761 16.33114 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

0.75 19.05 5435.8249 17.1477 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

1.00 25.40 5694.6737 17.96425 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

1.25 31.75 5953.5225 18.78081 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

1.50 38.10 6212.3713 19.59737 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

1.75 44.45 6471.2201 20.41393 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

2.00 50.80 6730.0689 21.23048 0.00E+00 0.00E+00 0.00E+00 5.19E-02 2.35E-02

2.25 57.15 6988.9177 22.04704 2.04E-03 1.26E-01 5.74E-02 5.18E-02 2.35E-02

2.50 63.50 7247.7665 22.8636 1.61E-02 9.96E-01 4.52E-01 5.10E-02 2.32E-02

2.75 69.85 7506.6153 23.68015 3.07E-02 1.90E+00 8.61E-01 5.03E-02 2.28E-02

3.00 76.20 7765.4641 24.49671 4.57E-02 2.83E+00 1.28E+00 4.95E-02 2.25E-02

3.25 82.55 8024.3129 25.31327 6.13E-02 3.80E+00 1.72E+00 4.87E-02 2.21E-02

3.50 88.90 8283.1617 26.12982 7.74E-02 4.79E+00 2.17E+00 4.79E-02 2.17E-02

3.75 95.25 8542.0105 26.94638 9.40E-02 5.82E+00 2.64E+00 4.70E-02 2.13E-02

4.00 101.60 8800.8593 27.76294 1.11E-01 6.88E+00 3.12E+00 4.61E-02 2.09E-02

4.25 107.95 9059.7081 28.5795 1.29E-01 7.97E+00 3.61E+00 4.52E-02 2.05E-02

4.50 114.30 9318.5569 29.39605 1.47E-01 9.09E+00 4.13E+00 4.43E-02 2.01E-02

4.75 120.65 9577.4057 30.21261 1.66E-01 1.02E+01 4.65E+00 4.33E-02 1.96E-02

5.00 127.00 9836.2545 31.02917 1.85E-01 1.14E+01 5.19E+00 4.23E-02 1.92E-02

5.25 133.35 10095.103 31.84572 2.04E-01 1.26E+01 5.74E+00 4.13E-02 1.87E-02

5.50 139.70 10353.952 32.66228 2.25E-01 1.39E+01 6.30E+00 4.02E-02 1.83E-02

5.75 146.05 10612.801 33.47884 2.45E-01 1.52E+01 6.89E+00 3.92E-02 1.78E-02

6.00 152.40 10871.65 34.2954 2.66E-01 1.65E+01 7.48E+00 3.81E-02 1.73E-02

6.25 158.75 11130.499 35.11195 2.88E-01 1.78E+01 8.09E+00 3.69E-02 1.68E-02

6.50 165.10 11389.347 35.92851 3.10E-01 1.92E+01 8.71E+00 3.58E-02 1.62E-02

6.75 171.45 11648.196 36.74507 3.33E-01 2.06E+01 9.35E+00 3.46E-02 1.57E-02

7.00 177.80 11907.045 37.56162 3.56E-01 2.21E+01 1.00E+01 3.34E-02 1.51E-02

7.25 184.15 12165.894 38.37818 3.80E-01 2.35E+01 1.07E+01 3.22E-02 1.46E-02

7.50 190.50 12424.743 39.19474 4.04E-01 2.50E+01 1.14E+01 3.09E-02 1.40E-02

7.75 196.85 12683.591 40.01129 4.29E-01 2.66E+01 1.21E+01 2.96E-02 1.34E-02

8.00 203.20 12942.44 40.82785 4.54E-01 2.81E+01 1.28E+01 2.83E-02 1.28E-02

8.25 209.55 13201.289 41.64441 4.80E-01 2.97E+01 1.35E+01 2.70E-02 1.22E-02

8.50 215.90 13460.138 42.46097 5.07E-01 3.14E+01 1.42E+01 2.56E-02 1.16E-02

8.75 222.25 13718.987 43.27752 5.33E-01 3.30E+01 1.50E+01 2.42E-02 1.10E-02

9.00 228.60 13977.835 44.09408 5.61E-01 3.47E+01 1.57E+01 2.28E-02 1.03E-02

9.25 234.95 13201.289 41.64441 5.88E-01 3.64E+01 1.65E+01 2.14E-02 9.71E-03

9.50 241.30 12424.743 39.19474 6.13E-01 3.79E+01 1.72E+01 2.01E-02 9.11E-03

9.75 247.65 11648.196 36.74507 6.37E-01 3.94E+01 1.79E+01 1.89E-02 8.55E-03

10.00 254.00 10871.65 34.2954 6.59E-01 4.08E+01 1.85E+01 1.77E-02 8.03E-03

10.25 260.35 10095.103 31.84572 6.79E-01 4.21E+01 1.91E+01 1.66E-02 7.54E-03

10.50 266.70 9318.5569 29.39605 6.99E-01 4.33E+01 1.96E+01 1.56E-02 7.09E-03

10.75 273.05 8542.0105 26.94638 7.16E-01 4.43E+01 2.01E+01 1.47E-02 6.68E-03

11.00 279.40 7765.4641 24.49671 7.32E-01 4.53E+01 2.06E+01 1.39E-02 6.30E-03

11.25 285.75 6988.9177 22.04704 7.47E-01 4.62E+01 2.10E+01 1.31E-02 5.96E-03

11.50 292.10 6212.3713 19.59737 7.60E-01 4.70E+01 2.13E+01 1.25E-02 5.65E-03

11.75 298.45 5435.8249 17.1477 7.71E-01 4.78E+01 2.17E+01 1.19E-02 5.38E-03

12.00 304.80 4659.2785 14.69803 7.81E-01 4.84E+01 2.19E+01 1.13E-02 5.15E-03

Results for RBHT Test 1582

Valid Time Period 2822 to 2894 seconds
A-235

Figure A-195 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582G for Time Period 2822 to 2894 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-236

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-H 

Test Conditions

Date: 6/11/2003

Steady-state time window: 3600 – 3668 seconds

Inlet flow rate: 0.765 cm/sec (0.301 in./sec) 

Inlet mass flow rate: 0.0608 kg/sec (0.134 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-237

Figure A-196 Inlet Flow Plot for Experiment 1582H 

Figure A-197 Inlet Temperature Plot for Experiment 1582H 
A-238

Figure A-198 System Pressure Plot for Experiment 1582H 

Figure A-199 Bundle Power Plot for Experiment 1582H 
A-239

Table A-79: Data Results for RBHT Test 1582 for Time Period 3600 to 3668 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.946 3.080 147.454 0.766 36.676 0.217 10.390 0.000 0.000 2.098 100.453 2882.098 137995.5929 0.963 0.958 0.968

* 120-133 3048-3378 383 0.879 8.174 391.388 0.874 41.847 0.387 18.530 3.935 188.423 2.978 142.587 2885.076 138138.1803 0.956 0.951 0.961

* 108-120 2743-3048 382 0.852 9.234 442.114 0.729 34.905 0.483 23.126 4.352 208.362 3.67 175.721 2888.746 138313.9009 0.941 0.936 0.946

100-108 2540-2743 381 0.915 3.537 169.336 0.428 20.493 0.353 16.902 0.000 0.000 2.753 131.814 2891.499 138445.7152 0.934 0.929 0.939

97-100 2464-2540 380 0.887 1.766 84.544 0.148 7.086 0.128 6.129 0.000 0.000 1.489 71.294 2892.988 138517.0089 0.904 0.899 0.909

93-97 2362-2464 379 0.880 2.488 119.107 0.187 8.954 0.166 7.948 0.000 0.000 2.135 102.224 2895.123 138619.2333 0.897 0.893 0.901

* 85-93 2159-2362 378 0.765 9.763 467.477 0.339 16.231 0.319 15.274 4.981 238.514 4.124 197.458 2899.247 138816.6915 0.901 0.896 0.906

81-85 2057-2159 377 0.890 2.295 109.907 0.153 7.326 0.153 7.326 0.000 0.000 1.989 95.234 2901.236 138911.9253 0.904 0.899 0.90978-81 1981-2057 376 0.801 3.106 148.697 0.108 5.171 0.112 5.363 0.000 0.000 2.884 138.087 2904.12 139050.012 0.815 0.811 0.81975-78 1905-1981 375 0.814 2.898 138.751 0.102 4.884 0.109 5.219 0.000 0.000 2.684 128.511 2906.804 139178.5226 0.828 0.824 0.83272-75 1829-1905 374 0.787 3.324 159.141 0.096 4.597 0.107 5.123 0.000 0.000 3.119 149.339 2909.923 139327.8611 0.8 0.796 0.804

* 67-72 1702-1829 373 0.660 8.818 422.221 0.148 7.086 0.172 8.235 3.538 169.413 4.96 237.486 2914.883 139565.3472 0.809 0.805 0.813

63-67 1600-1702 372 0.807 4.020 192.461 0.107 5.123 0.133 6.368 0.000 0.000 3.777 180.844 2918.66 139746.1909 0.818 0.814 0.82260-63 1524-1600 371 0.717 4.414 211.359 0.074 3.543 0.097 4.644 0.000 0.000 4.241 203.060 2922.901 139949.2511 0.728 0.724 0.73257-60 1448-1524 370 0.736 4.118 197.186 0.069 3.304 0.094 4.501 0.000 0.000 3.955 189.366 2926.856 140138.6175 0.746 0.742 0.75053-57 1346-1448 369 0.679 6.679 319.774 0.085 4.070 0.122 5.841 0.000 0.000 6.471 309.833 2933.327 140448.4506 0.688 0.685 0.691

* 46-53 1168-1346 368 0.502 18.099 866.573 0.127 6.081 0.202 9.672 3.870 185.285 13.9 665.536 2947.227 141113.9862 0.617 0.614 0.620

43-46 1092-1168 367 0.538 7.193 344.391 0.046 2.202 0.083 3.974 0.000 0.000 7.064 338.226 2954.291 141452.2123 0.547 0.544 0.55037-43 940-1092 366 0.571 13.362 639.797 0.078 3.735 0.158 7.565 0.000 0.000 13.12 628.189 2967.411 142080.4013 0.579 0.576 0.582

* 25-37 635-940 365 0.290 44.252 2118.815 0.093 4.453 0.285 13.646 1.244 59.581 42.63 2041.135 3010.041 144121.5367 0.316 0.314 0.318

13-25 330-635 364 0.052 59.095 2829.479 0.025 1.197 0.051 2.442 0.000 0.000 59 2824.935 3069.041 146946.4718 0.053 0.050 0.056

* 0-13 0-330 363 0.013 66.610 3189.287 0.001 0.048 0.000 0.000 0.909 43.506 65.7 3145.733 3134.741 150092.2047 0.026 0.025 0.027

Results for RBHT Test 1582

Valid Time Period 3600 to 3668 seconds

Collapsed Liquid Level = 54.486 inches = 1383.94 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-79 Data Results for RBHT Test 1582

H for Time Period 3600 to 3668 seconds
A-240

Table A-80 Energy Balance Results for RBHT Test 1582H for Time Period 7105 to 7225 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4657.2053 14.69149 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

0.25 6.35 4915.9389 15.50768 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

0.50 12.70 5174.6725 16.32387 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

0.75 19.05 5433.4062 17.14007 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

1.00 25.40 5692.1398 17.95626 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

1.25 31.75 5950.8734 18.77245 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

1.50 38.10 6209.607 19.58865 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

1.75 44.45 6468.3407 20.40484 0.00E+00 0.00E+00 0.00E+00 4.30E-02 1.95E-02

2.00 50.80 6727.0743 21.22104 7.11E-03 3.65E-01 1.65E-01 4.27E-02 1.94E-02

2.25 57.15 6985.8079 22.03723 2.34E-02 1.20E+00 5.45E-01 4.20E-02 1.91E-02

2.50 63.50 7244.5415 22.85342 4.04E-02 2.07E+00 9.40E-01 4.13E-02 1.87E-02

2.75 69.85 7503.2752 23.66962 5.79E-02 2.97E+00 1.35E+00 4.05E-02 1.84E-02

3.00 76.20 7762.0088 24.48581 7.61E-02 3.90E+00 1.77E+00 3.97E-02 1.80E-02

3.25 82.55 8020.7424 25.302 9.49E-02 4.87E+00 2.21E+00 3.89E-02 1.77E-02

3.50 88.90 8279.476 26.1182 1.14E-01 5.87E+00 2.66E+00 3.81E-02 1.73E-02

3.75 95.25 8538.2097 26.93439 1.34E-01 6.89E+00 3.13E+00 3.72E-02 1.69E-02

4.00 101.60 8796.9433 27.75059 1.55E-01 7.95E+00 3.61E+00 3.64E-02 1.65E-02

4.25 107.95 9055.6769 28.56678 1.76E-01 9.04E+00 4.10E+00 3.54E-02 1.61E-02

4.50 114.30 9314.4106 29.38297 1.98E-01 1.02E+01 4.61E+00 3.45E-02 1.56E-02

4.75 120.65 9573.1442 30.19917 2.21E-01 1.13E+01 5.13E+00 3.35E-02 1.52E-02

5.00 127.00 9831.8778 31.01536 2.44E-01 1.25E+01 5.67E+00 3.25E-02 1.48E-02

5.25 133.35 10090.611 31.83155 2.67E-01 1.37E+01 6.22E+00 3.15E-02 1.43E-02

5.50 139.70 10349.345 32.64775 2.92E-01 1.50E+01 6.79E+00 3.05E-02 1.38E-02

5.75 146.05 10608.079 33.46394 3.17E-01 1.62E+01 7.37E+00 2.94E-02 1.33E-02

6.00 152.40 10866.812 34.28014 3.42E-01 1.76E+01 7.96E+00 2.83E-02 1.28E-02

6.25 158.75 11125.546 35.09633 3.68E-01 1.89E+01 8.57E+00 2.72E-02 1.23E-02

6.50 165.10 11384.28 35.91252 3.95E-01 2.03E+01 9.20E+00 2.60E-02 1.18E-02

6.75 171.45 11643.013 36.72872 4.23E-01 2.17E+01 9.84E+00 2.48E-02 1.13E-02

7.00 177.80 11901.747 37.54491 4.51E-01 2.31E+01 1.05E+01 2.36E-02 1.07E-02

7.25 184.15 12160.48 38.3611 4.79E-01 2.46E+01 1.12E+01 2.24E-02 1.02E-02

7.50 190.50 12419.214 39.1773 5.08E-01 2.61E+01 1.18E+01 2.11E-02 9.59E-03

7.75 196.85 12677.948 39.99349 5.38E-01 2.76E+01 1.25E+01 1.99E-02 9.01E-03

8.00 203.20 12936.681 40.80968 5.69E-01 2.92E+01 1.32E+01 1.85E-02 8.41E-03

8.25 209.55 13195.415 41.62588 6.00E-01 3.08E+01 1.40E+01 1.72E-02 7.81E-03

8.50 215.90 13454.149 42.44207 6.32E-01 3.24E+01 1.47E+01 1.58E-02 7.19E-03

8.75 222.25 13712.882 43.25827 6.64E-01 3.41E+01 1.55E+01 1.45E-02 6.56E-03

9.00 228.60 13971.616 44.07446 6.97E-01 3.58E+01 1.62E+01 1.30E-02 5.91E-03

9.25 234.95 13195.415 41.62588 7.29E-01 3.74E+01 1.70E+01 1.16E-02 5.28E-03

9.50 241.30 12419.214 39.1773 7.60E-01 3.90E+01 1.77E+01 1.03E-02 4.69E-03

9.75 247.65 11643.013 36.72872 7.88E-01 4.05E+01 1.84E+01 9.11E-03 4.13E-03

10.00 254.00 10866.812 34.28014 8.15E-01 4.18E+01 1.90E+01 7.95E-03 3.61E-03

10.25 260.35 10090.611 31.83155 8.40E-01 4.31E+01 1.96E+01 6.88E-03 3.12E-03

10.50 266.70 9314.4106 29.38297 8.63E-01 4.43E+01 2.01E+01 5.88E-03 2.67E-03

10.75 273.05 8538.2097 26.93439 8.84E-01 4.54E+01 2.06E+01 4.97E-03 2.26E-03

11.00 279.40 7762.0088 24.48581 9.04E-01 4.64E+01 2.10E+01 4.14E-03 1.88E-03

11.25 285.75 6985.8079 22.03723 9.21E-01 4.73E+01 2.14E+01 3.38E-03 1.53E-03

11.50 292.10 6209.607 19.58865 9.37E-01 4.81E+01 2.18E+01 2.71E-03 1.23E-03

11.75 298.45 5433.4062 17.14007 9.51E-01 4.88E+01 2.21E+01 2.11E-03 9.58E-04

12.00 304.80 4657.2053 14.69149 9.63E-01 4.94E+01 2.24E+01 1.60E-03 7.24E-04

Results for RBHT Test 1582

Valid Time Period 3600 to 3668 seconds
A-241

Figure A-200 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582H for Time Period 3600 to 3668 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-242

RBHT Two-Phase Mixture Level and Uncovery Test INT-1582-I 

Test Conditions

Date: 6/11/2003

Inlet flow rate: 1.019 cm/sec (0.401 in./sec) 

Inlet mass flow rate: 0.0485 kg/sec (0.107 lbm/sec) 

Inlet flow temperature: 326 K (128 oF)

Upper plenum pressure: 138.0 kPa (20.02 psia)

Bundle power: 141.43 kW 
A-243

Figure A-201 Inlet Flow Plot for Experiment 1582I 

Figure A-202 Inlet Temperature Plot for Experiment 1582I 
A-244

Figure A-203 System Pressure Plot for Experiment 1582I 

Figure A-204 Bundle Power Plot for Experiment 1582I 
A-245

Table A-81: Data Results for RBHT Test 1582 for Time Period 4103 to 4200 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.980 1.127 53.959 0.327 15.657 0.000 0.000 0.000 0.000 0.797 38.161 2880.797 137933.3007 0.986 0.981 0.991

* 120-133 3048-3378 383 0.912 5.910 282.973 0.387 18.530 0.000 0.000 4.171 199.709 1.352 64.734 2882.149 137998.0348 0.98 0.975 0.985

* 108-120 2743-3048 382 0.891 6.777 324.499 0.549 26.286 0.274 13.119 3.949 189.093 2.005 96.000 2884.154 138094.0347 0.968 0.963 0.973

100-108 2540-2743 381 0.946 2.228 106.674 0.349 16.710 0.286 13.694 0.000 0.000 1.589 76.082 2885.743 138170.1165 0.962 0.957 0.967

97-100 2464-2540 380 0.919 1.262 60.424 0.122 5.841 0.104 4.980 0.000 0.000 1.038 49.700 2886.781 138219.8162 0.933 0.928 0.938

93-97 2362-2464 379 0.893 2.218 106.177 0.155 7.421 0.135 6.464 0.000 0.000 1.924 92.122 2888.705 138311.9378 0.907 0.902 0.912

* 85-93 2159-2362 378 0.774 9.410 450.568 0.282 13.502 0.259 12.401 4.629 221.653 4.24 203.012 2892.945 138514.9501 0.898 0.894 0.902

81-85 2057-2159 377 0.877 2.566 122.837 0.128 6.129 0.124 5.937 0.000 0.000 2.315 110.843 2895.26 138625.7929 0.889 0.885 0.893

78-81 1981-2057 376 0.786 3.334 159.638 0.090 4.309 0.091 4.357 0.000 0.000 3.152 150.919 2898.412 138776.7115 0.798 0.794 0.802

75-78 1905-1981 375 0.800 3.111 148.946 0.085 4.070 0.089 4.261 0.000 0.000 2.934 140.481 2901.346 138917.1921 0.812 0.808 0.816

72-75 1829-1905 374 0.763 3.698 177.044 0.080 3.830 0.087 4.166 0.000 0.000 3.531 169.065 2904.877 139086.2573 0.773 0.769 0.777

* 67-72 1702-1829 373 0.640 9.348 447.584 0.124 5.937 0.140 6.703 3.164 151.493 5.92 283.451 2910.797 139369.7084 0.772 0.768 0.776

63-67 1600-1702 372 0.761 4.965 237.717 0.090 4.309 0.108 5.171 0.000 0.000 4.763 228.054 2915.56 139597.7621 0.771 0.767 0.775

60-63 1524-1600 371 0.673 5.089 243.685 0.063 3.016 0.078 3.735 0.000 0.000 4.947 236.864 2920.507 139834.6257 0.682 0.679 0.685

57-60 1448-1524 370 0.685 4.913 235.230 0.058 2.777 0.076 3.639 0.000 0.000 4.774 228.580 2925.281 140063.2061 0.694 0.691 0.697

53-57 1346-1448 369 0.630 7.681 367.765 0.072 3.447 0.099 4.740 0.000 0.000 7.506 359.389 2932.787 140422.5953 0.639 0.636 0.642

* 46-53 1168-1346 368 0.497 18.301 876.271 0.109 5.219 0.164 7.852 1.968 94.242 16.06 768.957 2948.847 141191.5522 0.558 0.555 0.561

43-46 1092-1168 367 0.471 8.242 394.620 0.040 1.915 0.067 3.208 0.000 0.000 8.134 389.458 2956.981 141581.0102 0.478 0.476 0.480

37-43 940-1092 366 0.549 14.058 673.117 0.069 3.304 0.128 6.129 0.000 0.000 13.86 663.620 2970.841 142244.6306 0.555 0.552 0.558

* 25-37 635-940 365 0.350 40.503 1939.284 0.093 4.453 0.231 11.060 -0.661 -31.659 40.84 1955.430 3011.681 144200.0603 0.344 0.342 0.346

13-25 330-635 364 0.131 54.135 2592.011 0.037 1.772 0.111 5.315 0.000 0.000 53.97 2584.097 3065.651 146784.1578 0.134 0.133 0.135

* 0-13 0-330 363 0.015 66.469 3182.573 0.001 0.048 0.000 0.000 3.488 167.027 62.98 3015.499 3128.631 149799.6563 0.067 0.064 0.070

 (Z2φ) Two-Phase Level (Dryout) = 113.60 inches = 2885.44 mm

 (S) Level Swell = 3.00

Results for RBHT Test 1582

Valid Time Period 4103 to 4200 seconds

Collapsed Liquid Level = 50.180 inches = 1274.56 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-81 Data Results for RBHT Test 1582I for Time Period 4103 to 4200 seconds
A-246

Table A-82 Energy Balance Results for RBHT Test 1582I for Time Period 4103 to 4200 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 4658.6938 14.69618 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

0.25 6.35 4917.5101 15.51264 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

0.50 12.70 5176.3264 16.32909 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

0.75 19.05 5435.1427 17.14555 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

1.00 25.40 5693.959 17.962 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

1.25 31.75 5952.7754 18.77845 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

1.50 38.10 6211.5917 19.59491 0.00E+00 0.00E+00 0.00E+00 3.44E-02 1.56E-02

1.75 44.45 6470.408 20.41136 1.57E-02 6.55E-01 2.97E-01 3.39E-02 1.54E-02

2.00 50.80 6729.2243 21.22782 3.53E-02 1.47E+00 6.67E-01 3.32E-02 1.51E-02

2.25 57.15 6988.0407 22.04427 5.57E-02 2.32E+00 1.05E+00 3.25E-02 1.47E-02

2.50 63.50 7246.857 22.86073 7.69E-02 3.20E+00 1.45E+00 3.18E-02 1.44E-02

2.75 69.85 7505.6733 23.67718 9.88E-02 4.11E+00 1.87E+00 3.10E-02 1.41E-02

3.00 76.20 7764.4896 24.49364 1.22E-01 5.06E+00 2.29E+00 3.02E-02 1.37E-02

3.25 82.55 8023.3059 25.31009 1.45E-01 6.03E+00 2.74E+00 2.94E-02 1.34E-02

3.50 88.90 8282.1223 26.12655 1.69E-01 7.04E+00 3.19E+00 2.86E-02 1.30E-02

3.75 95.25 8540.9386 26.943 1.94E-01 8.08E+00 3.67E+00 2.77E-02 1.26E-02

4.00 101.60 8799.7549 27.75945 2.20E-01 9.15E+00 4.15E+00 2.69E-02 1.22E-02

4.25 107.95 9058.5712 28.57591 2.47E-01 1.03E+01 4.65E+00 2.59E-02 1.18E-02

4.50 114.30 9317.3875 29.39236 2.74E-01 1.14E+01 5.17E+00 2.50E-02 1.13E-02

4.75 120.65 9576.2039 30.20882 3.02E-01 1.26E+01 5.70E+00 2.40E-02 1.09E-02

5.00 127.00 9835.0202 31.02527 3.31E-01 1.38E+01 6.24E+00 2.30E-02 1.05E-02

5.25 133.35 10093.836 31.84173 3.60E-01 1.50E+01 6.80E+00 2.20E-02 9.99E-03

5.50 139.70 10352.653 32.65818 3.91E-01 1.63E+01 7.38E+00 2.10E-02 9.51E-03

5.75 146.05 10611.469 33.47464 4.22E-01 1.76E+01 7.96E+00 1.99E-02 9.03E-03

6.00 152.40 10870.285 34.29109 4.54E-01 1.89E+01 8.57E+00 1.88E-02 8.53E-03

6.25 158.75 11129.102 35.10755 4.86E-01 2.02E+01 9.18E+00 1.77E-02 8.02E-03

6.50 165.10 11387.918 35.924 5.20E-01 2.16E+01 9.82E+00 1.65E-02 7.50E-03

6.75 171.45 11646.734 36.74046 5.54E-01 2.31E+01 1.05E+01 1.54E-02 6.96E-03

7.00 177.80 11905.551 37.55691 5.89E-01 2.45E+01 1.11E+01 1.41E-02 6.42E-03

7.25 184.15 12164.367 38.37336 6.25E-01 2.60E+01 1.18E+01 1.29E-02 5.86E-03

7.50 190.50 12423.183 39.18982 6.61E-01 2.75E+01 1.25E+01 1.17E-02 5.29E-03

7.75 196.85 12682 40.00627 6.99E-01 2.91E+01 1.32E+01 1.04E-02 4.71E-03

8.00 203.20 12940.816 40.82273 7.37E-01 3.07E+01 1.39E+01 9.06E-03 4.11E-03

8.25 209.55 13199.632 41.63918 7.76E-01 3.23E+01 1.46E+01 7.73E-03 3.50E-03

8.50 215.90 13458.449 42.45564 8.15E-01 3.39E+01 1.54E+01 6.36E-03 2.89E-03

8.75 222.25 13717.265 43.27209 8.56E-01 3.56E+01 1.62E+01 4.97E-03 2.25E-03

9.00 228.60 13976.081 44.08855 8.97E-01 3.73E+01 1.69E+01 3.55E-03 1.61E-03

9.25 234.95 13199.632 41.63918 9.37E-01 3.90E+01 1.77E+01 2.17E-03 9.82E-04

9.50 241.30 12423.183 39.18982 9.75E-01 4.06E+01 1.84E+01 8.54E-04 3.87E-04

9.75 247.65 11646.734 36.74046 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

10.00 254.00 10870.285 34.29109 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

10.25 260.35 10093.836 31.84173 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

10.50 266.70 9317.3875 29.39236 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

10.75 273.05 8540.9386 26.943 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

11.00 279.40 7764.4896 24.49364 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

11.25 285.75 6988.0407 22.04427 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

11.50 292.10 6211.5917 19.59491 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

11.75 298.45 5435.1427 17.14555 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

12.00 304.80 4658.6938 14.69618 1.00E+00 4.16E+01 1.89E+01 0.00E+00 0.00E+00

Results for RBHT Test 1582

Valid Time Period 4103 to 4200 seconds
A-247

Figure A-205 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1582I for Time Period 4103 to 4200 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-248

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-A 

Test Conditions

Date: 6/16/2003

Steady-state time window: 2965 – 3060 seconds

Inlet flow rate: 2.545 cm/sec (1.002 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.258 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 90.81 kW 
A-249

Figure A-206 Inlet Flow Plot for Experiment 1595A 

Figure A-207 Inlet Temperature Plot for Experiment 1595A 
A-250

Figure A-208 System Pressure Plot for Experiment 1595A 

Figure A-209 Bundle Power Plot for Experiment 1595A 
A-251

Table A-83: Data Results for RBHT Test 1595 for Time Period 2965 to 3060 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.752 14.141 677.096 0.749 35.862 0.163 7.804 0.000 0.000 13.22 632.977 4333.22 207475.6872 0.768 0.764 0.772

* 120-133 3048-3378 383 0.749 16.935 810.874 0.832 39.836 0.290 13.885 0.153 7.347 15.66 749.805 4348.88 208225.4921 0.768 0.764 0.772

* 108-120 2743-3048 382 0.677 20.135 964.047 0.698 33.420 0.362 17.333 4.555 218.073 14.52 695.221 4363.4 208920.7134 0.767 0.763 0.771

100-108 2540-2743 381 0.750 10.392 497.565 0.419 20.062 0.265 12.688 0.000 0.000 9.704 464.630 4373.104 209385.3434 0.766 0.762 0.770

97-100 2464-2540 380 0.671 5.131 245.674 0.147 7.038 0.096 4.597 0.000 0.000 4.884 233.847 4377.988 209619.1906 0.686 0.683 0.689

93-97 2362-2464 379 0.674 6.782 324.747 0.188 9.001 0.125 5.985 0.000 0.000 6.466 309.594 4384.454 209928.7843 0.689 0.686 0.692

* 85-93 2159-2362 378 0.495 21.002 1005.573 0.348 16.662 0.240 11.491 8.284 396.632 12.13 580.788 4396.584 210509.5718 0.708 0.704 0.712

81-85 2057-2159 377 0.714 5.946 284.713 0.160 7.661 0.115 5.506 0.000 0.000 5.667 271.337 4402.251 210780.9093 0.727 0.723 0.73178-81 1981-2057 376 0.753 3.843 184.007 0.114 5.458 0.084 4.022 0.000 0.000 3.646 174.571 4405.897 210955.4807 0.766 0.762 0.77075-78 1905-1981 375 0.602 6.206 297.146 0.109 5.219 0.082 3.926 0.000 0.000 6.011 287.808 4411.908 211243.2889 0.614 0.611 0.61772-75 1829-1905 374 0.540 7.167 343.148 0.104 4.980 0.080 3.830 0.000 0.000 6.982 334.300 4418.89 211577.5889 0.552 0.549 0.555

* 67-72 1702-1829 373 0.429 14.827 709.919 0.163 7.804 0.130 6.224 4.324 207.032 10.21 488.857 4429.1 212066.4463 0.607 0.604 0.610

63-67 1600-1702 372 0.651 7.245 346.878 0.120 5.746 0.100 4.788 0.000 0.000 7.022 336.215 4436.122 212402.6614 0.662 0.659 0.66560-63 1524-1600 371 0.479 8.112 388.404 0.085 4.070 0.073 3.495 0.000 0.000 7.951 380.696 4444.073 212783.3574 0.49 0.488 0.49257-60 1448-1524 370 0.464 8.351 399.842 0.080 3.830 0.071 3.399 0.000 0.000 8.195 392.379 4452.268 213175.7361 0.474 0.472 0.47653-57 1346-1448 369 0.429 11.872 568.432 0.099 4.740 0.091 4.357 0.000 0.000 11.68 559.241 4463.948 213734.9775 0.438 0.436 0.440

* 46-53 1168-1346 368 0.326 24.492 1172.671 0.152 7.278 0.152 7.278 5.078 243.124 19.11 914.992 4483.058 214649.9692 0.474 0.472 0.476

43-46 1092-1168 367 0.503 7.748 370.998 0.057 2.729 0.062 2.969 0.000 0.000 7.625 365.087 4490.683 215015.0561 0.51 0.507 0.51337-43 940-1092 366 0.405 18.530 887.212 0.098 4.692 0.118 5.650 0.000 0.000 18.31 876.688 4508.993 215891.7437 0.412 0.410 0.414

* 25-37 635-940 365 0.231 47.919 2294.367 0.133 6.368 0.214 10.246 0.482 23.071 47.09 2254.681 4556.083 218146.425 0.244 0.243 0.245

13-25 330-635 364 0.073 57.745 2764.828 0.053 2.538 0.095 4.549 0.000 0.000 57.58 2756.945 4613.663 220903.3702 0.076 0.072 0.080

* 0-13 0-330 363 0.042 64.709 3098.278 0.004 0.192 0.000 0.000 -0.225 -10.778 64.93 3108.865 4678.593 224012.2352 0.038 0.036 0.040

Results for RBHT Test 1595

Valid Time Period 2965 to 3060 seconds

Collapsed Liquid Level = 75.056 inches = 1906.42 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-83 Data Results for RBHT Test 1595

A for Time Period 2965 to 3060 seconds
A-252

Table A-84 Energy Balance Results for RBHT Test 1595A for Time Period 2965 to 3060 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2610.5752 8.2352 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

0.25 6.35 2755.6071 8.6928 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

0.50 12.70 2900.6391 9.1503 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

0.75 19.05 3045.671 9.6078 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

1.00 25.40 3190.703 10.065 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

1.25 31.75 3335.7349 10.523 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

1.50 38.10 3480.7669 10.98 0.00E+00 0.00E+00 0.00E+00 8.37E-02 3.80E-02

1.75 44.45 3625.7989 11.438 2.96E-03 2.01E-01 9.10E-02 8.35E-02 3.79E-02

2.00 50.80 3770.8308 11.895 7.60E-03 5.15E-01 2.34E-01 8.31E-02 3.77E-02

2.25 57.15 3915.8628 12.353 1.24E-02 8.41E-01 3.82E-01 8.27E-02 3.75E-02

2.50 63.50 4060.8947 12.81 1.74E-02 1.18E+00 5.35E-01 8.23E-02 3.73E-02

2.75 69.85 4205.9267 13.268 2.26E-02 1.53E+00 6.95E-01 8.18E-02 3.71E-02

3.00 76.20 4350.9586 13.725 2.80E-02 1.89E+00 8.60E-01 8.14E-02 3.69E-02

3.25 82.55 4495.9906 14.183 3.35E-02 2.27E+00 1.03E+00 8.09E-02 3.67E-02

3.50 88.90 4641.0225 14.64 3.93E-02 2.66E+00 1.21E+00 8.05E-02 3.65E-02

3.75 95.25 4786.0545 15.098 4.52E-02 3.06E+00 1.39E+00 8.00E-02 3.63E-02

4.00 101.60 4931.0864 15.555 5.13E-02 3.47E+00 1.58E+00 7.94E-02 3.60E-02

4.25 107.95 5076.1184 16.013 5.76E-02 3.90E+00 1.77E+00 7.89E-02 3.58E-02

4.50 114.30 5221.1503 16.47 6.40E-02 4.34E+00 1.97E+00 7.84E-02 3.56E-02

4.75 120.65 5366.1823 16.928 7.07E-02 4.79E+00 2.17E+00 7.78E-02 3.53E-02

5.00 127.00 5511.2143 17.386 7.75E-02 5.25E+00 2.38E+00 7.73E-02 3.50E-02

5.25 133.35 5656.2462 17.843 8.45E-02 5.72E+00 2.60E+00 7.67E-02 3.48E-02

5.50 139.70 5801.2782 18.301 9.17E-02 6.21E+00 2.82E+00 7.61E-02 3.45E-02

5.75 146.05 5946.3101 18.758 9.90E-02 6.71E+00 3.04E+00 7.54E-02 3.42E-02

6.00 152.40 6091.3421 19.216 1.07E-01 7.22E+00 3.27E+00 7.48E-02 3.39E-02

6.25 158.75 6236.374 19.673 1.14E-01 7.74E+00 3.51E+00 7.42E-02 3.36E-02

6.50 165.10 6381.406 20.131 1.22E-01 8.28E+00 3.75E+00 7.35E-02 3.33E-02

6.75 171.45 6526.4379 20.588 1.30E-01 8.82E+00 4.00E+00 7.28E-02 3.30E-02

7.00 177.80 6671.4699 21.046 1.39E-01 9.39E+00 4.26E+00 7.21E-02 3.27E-02

7.25 184.15 6816.5018 21.503 1.47E-01 9.96E+00 4.52E+00 7.14E-02 3.24E-02

7.50 190.50 6961.5338 21.961 1.56E-01 1.05E+01 4.78E+00 7.07E-02 3.21E-02

7.75 196.85 7106.5658 22.418 1.65E-01 1.11E+01 5.06E+00 7.00E-02 3.17E-02

8.00 203.20 7251.5977 22.876 1.74E-01 1.18E+01 5.33E+00 6.92E-02 3.14E-02

8.25 209.55 7396.6297 23.333 1.83E-01 1.24E+01 5.62E+00 6.84E-02 3.10E-02

8.50 215.90 7541.6616 23.791 1.92E-01 1.30E+01 5.90E+00 6.77E-02 3.07E-02

8.75 222.25 7686.6936 24.248 2.02E-01 1.37E+01 6.20E+00 6.69E-02 3.03E-02

9.00 228.60 7831.7255 24.706 2.11E-01 1.43E+01 6.49E+00 6.60E-02 3.00E-02

9.25 234.95 7396.6297 23.333 2.21E-01 1.50E+01 6.79E+00 6.52E-02 2.96E-02

9.50 241.30 6961.5338 21.961 2.30E-01 1.56E+01 7.07E+00 6.45E-02 2.92E-02

9.75 247.65 6526.4379 20.588 2.38E-01 1.61E+01 7.32E+00 6.38E-02 2.89E-02

10.00 254.00 6091.3421 19.216 2.46E-01 1.67E+01 7.57E+00 6.31E-02 2.86E-02

10.25 260.35 5656.2462 17.843 2.54E-01 1.72E+01 7.79E+00 6.25E-02 2.83E-02

10.50 266.70 5221.1503 16.47 2.61E-01 1.76E+01 8.00E+00 6.19E-02 2.81E-02

10.75 273.05 4786.0545 15.098 2.67E-01 1.81E+01 8.20E+00 6.14E-02 2.79E-02

11.00 279.40 4350.9586 13.725 2.73E-01 1.85E+01 8.37E+00 6.09E-02 2.76E-02

11.25 285.75 3915.8628 12.353 2.78E-01 1.88E+01 8.53E+00 6.05E-02 2.74E-02

11.50 292.10 3480.7669 10.98 2.82E-01 1.91E+01 8.68E+00 6.01E-02 2.73E-02

11.75 298.45 3045.671 9.6078 2.87E-01 1.94E+01 8.80E+00 5.98E-02 2.71E-02

12.00 304.80 2610.5752 8.2352 2.90E-01 1.96E+01 8.91E+00 5.95E-02 2.70E-02

Results for RBHT Test 1595

Valid Time Period 2965 to 3060 seconds
A-253

Figure A-210 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595A for Time Period 2965 to 3060 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-254

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-B 

Test Conditions

Date: 6/16/2003

Steady-state time window: 3765 – 3885 seconds

Inlet flow rate: 2.550 cm/sec (1.004 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.259 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-255

Figure A-211 Inlet Flow Plot for Experiment 1595B 

Figure A-212 Inlet Temperature Plot for Experiment 1595B 
A-256

Figure A-213 System Pressure Plot for Experiment 1595B 

Figure A-214 Bundle Power Plot for Experiment 1595B 
A-257

Table A-85: Data Results for RBHT Test 1595 for Time Period 3765 to 3885 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.597 23.038 1103.047 0.539 25.807 0.108 5.171 0.000 0.000 22.38 1071.560 4342.38 207914.2704 0.608 0.605 0.611

* 120-133 3048-3378 383 0.647 23.853 1142.086 0.600 28.728 0.194 9.289 -2.941 -140.818 26 1244.887 4368.38 209159.1571 0.615 0.612 0.618

* 108-120 2743-3048 382 0.543 28.470 1363.143 0.503 24.084 0.242 11.587 4.555 218.087 23.17 1109.386 4391.55 210268.5426 0.628 0.625 0.631

100-108 2540-2743 381 0.623 15.653 749.455 0.303 14.508 0.177 8.475 0.000 0.000 15.17 726.343 4406.72 210994.8861 0.635 0.632 0.638

97-100 2464-2540 380 0.487 7.993 382.685 0.106 5.075 0.064 3.064 0.000 0.000 7.817 374.280 4414.537 211369.1661 0.498 0.496 0.500

93-97 2362-2464 379 0.521 9.956 476.677 0.135 6.464 0.083 3.974 0.000 0.000 9.731 465.923 4424.268 211835.0889 0.531 0.528 0.534

* 85-93 2159-2362 378 0.395 25.141 1203.753 0.250 11.970 0.160 7.661 7.311 350.048 17.42 834.074 4441.688 212669.163 0.581 0.578 0.584

81-85 2057-2159 377 0.621 7.883 377.463 0.115 5.506 0.077 3.687 0.000 0.000 7.688 368.103 4449.376 213037.2664 0.63 0.627 0.63378-81 1981-2057 376 0.616 5.988 286.703 0.082 3.926 0.056 2.681 0.000 0.000 5.847 279.956 4455.223 213317.2222 0.625 0.622 0.62875-78 1905-1981 375 0.456 8.470 405.561 0.078 3.735 0.055 2.633 0.000 0.000 8.336 399.130 4463.559 213716.3521 0.465 0.463 0.46772-75 1829-1905 374 0.357 10.013 479.413 0.074 3.543 0.053 2.538 0.000 0.000 9.881 473.105 4473.44 214189.4569 0.366 0.364 0.368

* 67-72 1702-1829 373 0.387 15.928 762.634 0.115 5.506 0.086 4.118 0.997 47.734 14.73 705.276 4488.17 214894.7331 0.433 0.431 0.435

63-67 1600-1702 372 0.492 10.553 505.273 0.084 4.022 0.067 3.208 0.000 0.000 10.4 497.955 4498.57 215392.6877 0.499 0.497 0.50160-63 1524-1600 371 0.349 10.148 485.878 0.059 2.825 0.048 2.298 0.000 0.000 10.04 480.718 4508.61 215873.4055 0.356 0.354 0.35857-60 1448-1524 370 0.341 10.267 491.597 0.055 2.633 0.047 2.250 0.000 0.000 10.16 486.463 4518.77 216359.8689 0.348 0.346 0.35053-57 1346-1448 369 0.316 14.214 680.577 0.067 3.208 0.061 2.921 0.000 0.000 14.08 674.154 4532.85 217034.0229 0.322 0.320 0.324

* 46-53 1168-1346 368 0.239 27.670 1324.850 0.100 4.788 0.101 4.836 3.049 145.990 24.42 1169.236 4557.27 218203.2588 0.328 0.326 0.330

43-46 1092-1168 367 0.329 10.449 500.300 0.036 1.724 0.041 1.963 0.000 0.000 10.37 496.518 4567.64 218699.7771 0.334 0.332 0.33637-43 940-1092 366 0.231 23.952 1146.811 0.059 2.825 0.079 3.783 0.000 0.000 23.81 1140.029 4591.45 219839.806 0.236 0.235 0.237

* 25-37 635-940 365 0.065 58.248 2788.948 0.063 3.016 0.126 6.033 4.949 236.978 53.11 2542.920 4644.56 222382.7265 0.148 0.147 0.149

13-25 330-635 364 0.059 58.633 2807.349 0.004 0.192 0.000 0.000 0.000 0.000 58.61 2806.262 4703.17 225188.9883 0.059 0.056 0.062

* 0-13 0-330 363 0.041 64.740 3099.770 0.004 0.192 0.000 0.000 -0.754 -36.099 65.49 3135.678 4768.66 228324.6663 0.03 0.029 0.032

Results for RBHT Test 1595

Valid Time Period 3765 to 3885 seconds

Collapsed Liquid Level = 90.847 inches = 2307.50 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-85 Data Results for RBHT Test 1595

B for Time Period 3765 to 3885 seconds
A-258

Table A-86 Energy Balance Results for RBHT Test 1595B for Time Period 3765 to 3885 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1737.9565 5.4825 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

0.25 6.35 1834.5097 5.7871 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

0.50 12.70 1931.0628 6.0917 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

0.75 19.05 2027.616 6.3963 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

1.00 25.40 2124.1691 6.7008 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

1.25 31.75 2220.7222 7.0054 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

1.50 38.10 2317.2754 7.31 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

1.75 44.45 2413.8285 7.6146 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

2.00 50.80 2510.3817 7.9192 0.00E+00 0.00E+00 0.00E+00 8.39E-02 3.81E-02

2.25 57.15 2606.9348 8.2238 5.38E-04 3.65E-02 1.65E-02 8.39E-02 3.81E-02

2.50 63.50 2703.4879 8.5283 3.86E-03 2.62E-01 1.19E-01 8.36E-02 3.79E-02

2.75 69.85 2800.0411 8.8329 7.31E-03 4.96E-01 2.25E-01 8.33E-02 3.78E-02

3.00 76.20 2896.5942 9.1375 1.09E-02 7.37E-01 3.35E-01 8.30E-02 3.77E-02

3.25 82.55 2993.1474 9.4421 1.46E-02 9.88E-01 4.48E-01 8.27E-02 3.75E-02

3.50 88.90 3089.7005 9.7467 1.84E-02 1.25E+00 5.65E-01 8.24E-02 3.74E-02

3.75 95.25 3186.2537 10.051 2.23E-02 1.51E+00 6.86E-01 8.21E-02 3.72E-02

4.00 101.60 3282.8068 10.356 2.63E-02 1.79E+00 8.11E-01 8.17E-02 3.71E-02

4.25 107.95 3379.3599 10.66 3.05E-02 2.07E+00 9.39E-01 8.14E-02 3.69E-02

4.50 114.30 3475.9131 10.965 3.48E-02 2.36E+00 1.07E+00 8.10E-02 3.67E-02

4.75 120.65 3572.4662 11.27 3.92E-02 2.66E+00 1.21E+00 8.06E-02 3.66E-02

5.00 127.00 3669.0194 11.574 4.38E-02 2.97E+00 1.35E+00 8.03E-02 3.64E-02

5.25 133.35 3765.5725 11.879 4.84E-02 3.28E+00 1.49E+00 7.99E-02 3.62E-02

5.50 139.70 3862.1256 12.183 5.32E-02 3.61E+00 1.64E+00 7.95E-02 3.60E-02

5.75 146.05 3958.6788 12.488 5.81E-02 3.94E+00 1.79E+00 7.91E-02 3.59E-02

6.00 152.40 4055.2319 12.793 6.31E-02 4.28E+00 1.94E+00 7.86E-02 3.57E-02

6.25 158.75 4151.7851 13.097 6.82E-02 4.63E+00 2.10E+00 7.82E-02 3.55E-02

6.50 165.10 4248.3382 13.402 7.35E-02 4.99E+00 2.26E+00 7.78E-02 3.53E-02

6.75 171.45 4344.8913 13.706 7.89E-02 5.35E+00 2.43E+00 7.73E-02 3.51E-02

7.00 177.80 4441.4445 14.011 8.44E-02 5.72E+00 2.60E+00 7.69E-02 3.49E-02

7.25 184.15 4537.9976 14.315 9.00E-02 6.10E+00 2.77E+00 7.64E-02 3.46E-02

7.50 190.50 4634.5508 14.62 9.57E-02 6.49E+00 2.95E+00 7.59E-02 3.44E-02

7.75 196.85 4731.1039 14.925 1.02E-01 6.89E+00 3.13E+00 7.54E-02 3.42E-02

8.00 203.20 4827.657 15.229 1.08E-01 7.30E+00 3.31E+00 7.49E-02 3.40E-02

8.25 209.55 4924.2102 15.534 1.14E-01 7.71E+00 3.50E+00 7.44E-02 3.37E-02

8.50 215.90 5020.7633 15.838 1.20E-01 8.13E+00 3.69E+00 7.39E-02 3.35E-02

8.75 222.25 5117.3165 16.143 1.26E-01 8.56E+00 3.88E+00 7.33E-02 3.33E-02

9.00 228.60 5213.8696 16.448 1.33E-01 9.00E+00 4.08E+00 7.28E-02 3.30E-02

9.25 234.95 4924.2102 15.534 1.39E-01 9.44E+00 4.28E+00 7.23E-02 3.28E-02

9.50 241.30 4634.5508 14.62 1.45E-01 9.84E+00 4.46E+00 7.18E-02 3.26E-02

9.75 247.65 4344.8913 13.706 1.51E-01 1.02E+01 4.64E+00 7.13E-02 3.23E-02

10.00 254.00 4055.2319 12.793 1.56E-01 1.06E+01 4.80E+00 7.09E-02 3.21E-02

10.25 260.35 3765.5725 11.879 1.61E-01 1.09E+01 4.95E+00 7.04E-02 3.20E-02

10.50 266.70 3475.9131 10.965 1.65E-01 1.12E+01 5.09E+00 7.01E-02 3.18E-02

10.75 273.05 3186.2537 10.051 1.70E-01 1.15E+01 5.22E+00 6.97E-02 3.16E-02

11.00 279.40 2896.5942 9.1375 1.73E-01 1.18E+01 5.33E+00 6.94E-02 3.15E-02

11.25 285.75 2606.9348 8.2238 1.77E-01 1.20E+01 5.44E+00 6.91E-02 3.13E-02

11.50 292.10 2317.2754 7.31 1.80E-01 1.22E+01 5.53E+00 6.88E-02 3.12E-02

11.75 298.45 2027.616 6.3963 1.83E-01 1.24E+01 5.62E+00 6.86E-02 3.11E-02

12.00 304.80 1737.9565 5.4825 1.85E-01 1.25E+01 5.69E+00 6.84E-02 3.10E-02

Results for RBHT Test 1595

Valid Time Period 3765 to 3885 seconds
A-259

Figure A-215 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595B for Time Period 3765 to 3885 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-260

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-C 

Test Conditions

Date: 6/16/2003

Steady-state time window: 4255 – 4380 seconds

Inlet flow rate: 1.775 cm/sec (0.699 in./sec) 

Inlet mass flow rate: 0.082 kg/sec (0.180 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-261

Figure A-216 Inlet Flow Plot for Experiment 1595C 

Figure A-217 Inlet Temperature Plot for Experiment 1595C 
A-262

Figure A-218 System Pressure Plot for Experiment 1595C 

Figure A-219 Bundle Power Plot for Experiment 1595C 
A-263

Table A-87: Data Results for RBHT Test 1595 for Time Period 4255 to 4380 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.647 20.161 965.290 0.369 17.668 0.075 3.591 0.000 0.000 19.71 943.720 4339.71 207786.4301 0.655 0.652 0.658

* 120-133 3048-3378 383 0.671 22.181 1062.018 0.411 19.679 0.135 6.464 -1.555 -74.468 23.19 1110.343 4362.9 208896.7733 0.656 0.653 0.659

* 108-120 2743-3048 382 0.564 27.161 1300.481 0.345 16.519 0.168 8.044 5.438 260.378 21.21 1015.540 4384.11 209912.3135 0.66 0.657 0.663

100-108 2540-2743 381 0.653 14.406 689.777 0.208 9.959 0.123 5.889 0.000 0.000 14.07 673.675 4398.18 210585.9887 0.661 0.658 0.664

97-100 2464-2540 380 0.500 7.795 373.236 0.073 3.495 0.045 2.155 0.000 0.000 7.673 367.385 4405.853 210953.3739 0.507 0.504 0.510

93-97 2362-2464 379 0.540 9.556 457.531 0.093 4.453 0.058 2.777 0.000 0.000 9.4 450.074 4415.253 211403.4484 0.547 0.544 0.550

* 85-93 2159-2362 378 0.408 24.580 1176.898 0.173 8.283 0.111 5.315 7.626 365.136 16.67 798.164 4431.923 212201.6122 0.599 0.596 0.602

81-85 2057-2159 377 0.644 7.406 354.586 0.080 3.830 0.053 2.538 0.000 0.000 7.27 348.089 4439.193 212549.7017 0.65 0.647 0.65378-81 1981-2057 376 0.638 5.635 269.794 0.057 2.729 0.039 1.867 0.000 0.000 5.537 265.113 4444.73 212814.8147 0.645 0.642 0.64875-78 1905-1981 375 0.496 7.847 375.722 0.054 2.586 0.038 1.819 0.000 0.000 7.75 371.072 4452.48 213185.8867 0.502 0.499 0.50572-75 1829-1905 374 0.398 9.379 449.076 0.052 2.490 0.037 1.772 0.000 0.000 9.286 444.616 4461.766 213630.5028 0.404 0.402 0.406

* 67-72 1702-1829 373 0.389 15.876 760.147 0.081 3.878 0.060 2.873 2.135 102.225 13.6 651.171 4475.366 214281.6742 0.476 0.474 0.478

63-67 1600-1702 372 0.544 9.483 454.049 0.060 2.873 0.046 2.202 0.000 0.000 9.376 448.925 4484.742 214730.5995 0.549 0.546 0.55260-63 1524-1600 371 0.374 9.758 467.228 0.042 2.011 0.034 1.628 0.000 0.000 9.677 463.337 4494.419 215193.9368 0.379 0.377 0.38157-60 1448-1524 370 0.369 9.826 470.461 0.040 1.915 0.033 1.580 0.000 0.000 9.75 466.833 4504.169 215660.7693 0.374 0.372 0.37653-57 1346-1448 369 0.348 13.555 648.997 0.049 2.346 0.042 2.011 0.000 0.000 13.46 644.468 4517.629 216305.2376 0.352 0.350 0.354

* 46-53 1168-1346 368 0.270 26.538 1270.642 0.076 3.639 0.070 3.352 4.372 209.328 22.02 1054.323 4539.649 217359.5608 0.394 0.392 0.396

43-46 1092-1168 367 0.432 8.844 423.465 0.028 1.341 0.029 1.389 0.000 0.000 8.782 420.484 4548.431 217780.0452 0.436 0.434 0.43837-43 940-1092 366 0.303 21.734 1040.634 0.049 2.346 0.055 2.633 0.000 0.000 21.62 1035.171 4570.051 218815.2164 0.306 0.304 0.308

* 25-37 635-940 365 0.161 52.286 2503.488 0.066 3.160 0.099 4.740 1.451 69.496 50.67 2426.093 4620.721 221241.309 0.187 0.186 0.188

13-25 330-635 364 0.067 58.176 2785.467 0.026 1.245 0.044 2.107 0.000 0.000 58.09 2781.364 4678.811 224022.6731 0.068 0.065 0.071

* 0-13 0-330 363 0.042 64.657 3095.792 0.002 0.096 0.000 0.000 -0.555 -26.576 65.21 3122.272 4744.021 227144.9447 0.034 0.032 0.036

Results for RBHT Test 1595

Valid Time Period 4255 to 4380 seconds

Collapsed Liquid Level = 86.027 inches = 2185.08 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-87 Data Results for RBHT Test 1595

C for Time Period 4255 to 4380 seconds
A-264

Table A-88 Energy Balance Results for RBHT Test 1595C for Time Period 4255 to 4380 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1738.4222 5.484 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.25 6.35 1835.0012 5.7886 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.50 12.70 1931.5802 6.0933 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.75 19.05 2028.1593 6.398 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.00 25.40 2124.7383 6.7026 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.25 31.75 2221.3173 7.0073 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.50 38.10 2317.8963 7.312 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.75 44.45 2414.4753 7.6166 2.74E-03 1.29E-01 5.87E-02 5.83E-02 2.64E-02

2.00 50.80 2511.0543 7.9213 7.17E-03 3.38E-01 1.53E-01 5.80E-02 2.63E-02

2.25 57.15 2607.6333 8.226 1.18E-02 5.55E-01 2.52E-01 5.78E-02 2.62E-02

2.50 63.50 2704.2123 8.5306 1.65E-02 7.80E-01 3.54E-01 5.75E-02 2.61E-02

2.75 69.85 2800.7914 8.8353 2.15E-02 1.01E+00 4.60E-01 5.72E-02 2.59E-02

3.00 76.20 2897.3704 9.14 2.66E-02 1.26E+00 5.69E-01 5.69E-02 2.58E-02

3.25 82.55 2993.9494 9.4446 3.19E-02 1.51E+00 6.83E-01 5.66E-02 2.57E-02

3.50 88.90 3090.5284 9.7493 3.74E-02 1.76E+00 8.00E-01 5.63E-02 2.55E-02

3.75 95.25 3187.1074 10.054 4.30E-02 2.03E+00 9.21E-01 5.59E-02 2.54E-02

4.00 101.60 3283.6864 10.359 4.88E-02 2.30E+00 1.05E+00 5.56E-02 2.52E-02

4.25 107.95 3380.2654 10.663 5.48E-02 2.59E+00 1.17E+00 5.53E-02 2.51E-02

4.50 114.30 3476.8444 10.968 6.10E-02 2.88E+00 1.31E+00 5.49E-02 2.49E-02

4.75 120.65 3573.4235 11.273 6.73E-02 3.18E+00 1.44E+00 5.45E-02 2.47E-02

5.00 127.00 3670.0025 11.577 7.38E-02 3.48E+00 1.58E+00 5.41E-02 2.46E-02

5.25 133.35 3766.5815 11.882 8.05E-02 3.80E+00 1.72E+00 5.38E-02 2.44E-02

5.50 139.70 3863.1605 12.187 8.74E-02 4.12E+00 1.87E+00 5.34E-02 2.42E-02

5.75 146.05 3959.7395 12.491 9.44E-02 4.45E+00 2.02E+00 5.29E-02 2.40E-02

6.00 152.40 4056.3185 12.796 1.02E-01 4.79E+00 2.17E+00 5.25E-02 2.38E-02

6.25 158.75 4152.8975 13.101 1.09E-01 5.14E+00 2.33E+00 5.21E-02 2.36E-02

6.50 165.10 4249.4765 13.405 1.17E-01 5.50E+00 2.49E+00 5.17E-02 2.34E-02

6.75 171.45 4346.0555 13.71 1.24E-01 5.86E+00 2.66E+00 5.12E-02 2.32E-02

7.00 177.80 4442.6346 14.015 1.32E-01 6.24E+00 2.83E+00 5.07E-02 2.30E-02

7.25 184.15 4539.2136 14.319 1.40E-01 6.61E+00 3.00E+00 5.03E-02 2.28E-02

7.50 190.50 4635.7926 14.624 1.49E-01 7.01E+00 3.18E+00 4.98E-02 2.26E-02

7.75 196.85 4732.3716 14.929 1.57E-01 7.40E+00 3.36E+00 4.93E-02 2.24E-02

8.00 203.20 4828.9506 15.233 1.66E-01 7.81E+00 3.54E+00 4.88E-02 2.21E-02

8.25 209.55 4925.5296 15.538 1.74E-01 8.22E+00 3.73E+00 4.83E-02 2.19E-02

8.50 215.90 5022.1086 15.843 1.83E-01 8.64E+00 3.92E+00 4.78E-02 2.17E-02

8.75 222.25 5118.6876 16.147 1.92E-01 9.07E+00 4.11E+00 4.72E-02 2.14E-02

9.00 228.60 5215.2667 16.452 2.02E-01 9.51E+00 4.31E+00 4.67E-02 2.12E-02

9.25 234.95 4925.5296 15.538 2.11E-01 9.94E+00 4.51E+00 4.61E-02 2.09E-02

9.50 241.30 4635.7926 14.624 2.19E-01 1.03E+01 4.69E+00 4.56E-02 2.07E-02

9.75 247.65 4346.0555 13.71 2.27E-01 1.07E+01 4.87E+00 4.52E-02 2.05E-02

10.00 254.00 4056.3185 12.796 2.35E-01 1.11E+01 5.03E+00 4.47E-02 2.03E-02

10.25 260.35 3766.5815 11.882 2.42E-01 1.14E+01 5.18E+00 4.43E-02 2.01E-02

10.50 266.70 3476.8444 10.968 2.49E-01 1.17E+01 5.32E+00 4.39E-02 1.99E-02

10.75 273.05 3187.1074 10.054 2.55E-01 1.20E+01 5.45E+00 4.36E-02 1.98E-02

11.00 279.40 2897.3704 9.14 2.60E-01 1.23E+01 5.56E+00 4.33E-02 1.96E-02

11.25 285.75 2607.6333 8.226 2.65E-01 1.25E+01 5.67E+00 4.30E-02 1.95E-02

11.50 292.10 2317.8963 7.312 2.69E-01 1.27E+01 5.76E+00 4.27E-02 1.94E-02

11.75 298.45 2028.1593 6.398 2.73E-01 1.29E+01 5.85E+00 4.25E-02 1.93E-02

12.00 304.80 1738.4222 5.484 2.77E-01 1.30E+01 5.92E+00 4.23E-02 1.92E-02

Results for RBHT Test 1595

Valid Time Period 4255 to 4380 seconds
A-265

Figure A-220 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595C for Time Period 4255 to 4380 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-266

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-D 

Test Conditions

Date: 6/16/2003

Steady-state time window: 4800 – 4905 seconds

Inlet flow rate: 1.275 cm/sec (0.502 in./sec) 

Inlet mass flow rate: 0.059 kg/sec (0.129 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-267

Figure A-221 Inlet Flow Plot for Experiment 1595D 

Figure A-222 Inlet Temperature Plot for Experiment 1595D 
A-268

Figure A-223 System Pressure Plot for Experiment 1595D 

Figure A-224 Bundle Power Plot for Experiment 1595D 
A-269

Table A-89: Data Results for RBHT Test 1595 for Time Period 4800 to 4905 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.663 19.231 920.780 0.261 12.497 0.054 2.586 0.000 0.000 18.91 905.416 4338.91 207748.1259 0.669 0.666 0.672

* 120-133 3048-3378 383 0.679 21.661 1037.152 0.290 13.885 0.096 4.597 -0.995 -47.623 22.27 1066.293 4361.18 208814.4192 0.67 0.667 0.673

* 108-120 2743-3048 382 0.579 26.211 1254.977 0.243 11.635 0.120 5.746 5.438 260.360 20.41 977.236 4381.59 209791.6553 0.672 0.669 0.675

100-108 2540-2743 381 0.668 13.799 660.684 0.146 6.991 0.088 4.213 0.000 0.000 13.56 649.256 4395.15 210440.9116 0.674 0.671 0.677

97-100 2464-2540 380 0.522 7.442 356.327 0.051 2.442 0.032 1.532 0.000 0.000 7.356 352.207 4402.506 210793.1187 0.528 0.525 0.531

93-97 2362-2464 379 0.550 9.343 447.336 0.066 3.160 0.041 1.963 0.000 0.000 9.23 441.935 4411.736 211235.0535 0.556 0.553 0.559

* 85-93 2159-2362 378 0.417 24.222 1159.741 0.122 5.841 0.080 3.830 7.800 373.451 16.22 776.618 4427.956 212011.6713 0.61 0.607 0.613

81-85 2057-2159 377 0.659 7.084 339.169 0.056 2.681 0.038 1.819 0.000 0.000 6.987 334.539 4434.943 212346.2106 0.664 0.661 0.667

78-81 1981-2057 376 0.654 5.396 258.356 0.040 1.915 0.028 1.341 0.000 0.000 5.324 254.914 4440.267 212601.1251 0.658 0.655 0.661

75-78 1905-1981 375 0.517 7.530 360.554 0.038 1.819 0.027 1.293 0.000 0.000 7.463 357.330 4447.73 212958.4555 0.521 0.518 0.524

72-75 1829-1905 374 0.428 8.907 426.448 0.037 1.772 0.027 1.293 0.000 0.000 8.84 423.261 4456.57 213381.7169 0.432 0.430 0.434

* 67-72 1702-1829 373 0.385 15.964 764.375 0.058 2.777 0.043 2.059 3.033 145.235 12.83 614.304 4469.4 213996.0206 0.506 0.503 0.509

63-67 1600-1702 372 0.576 8.813 421.973 0.043 2.059 0.033 1.580 0.000 0.000 8.735 418.234 4478.135 214414.2547 0.579 0.576 0.582

60-63 1524-1600 371 0.392 9.467 453.303 0.030 1.436 0.024 1.149 0.000 0.000 9.411 450.601 4487.546 214864.8558 0.396 0.394 0.398

57-60 1448-1524 370 0.389 9.525 456.039 0.029 1.389 0.023 1.101 0.000 0.000 9.47 453.426 4497.016 215318.2818 0.392 0.390 0.394

53-57 1346-1448 369 0.363 13.238 633.829 0.036 1.724 0.030 1.436 0.000 0.000 13.17 630.583 4510.186 215948.8648 0.366 0.364 0.368

* 46-53 1168-1346 368 0.285 25.993 1244.533 0.055 2.633 0.050 2.394 4.878 233.542 21.01 1005.964 4531.196 216954.829 0.422 0.420 0.424

43-46 1092-1168 367 0.475 8.174 391.388 0.021 1.005 0.021 1.005 0.000 0.000 8.13 389.266 4539.326 217344.0955 0.478 0.476 0.480

37-43 940-1092 366 0.340 20.555 984.188 0.037 1.772 0.039 1.867 0.000 0.000 20.47 980.109 4559.796 218324.2043 0.343 0.341 0.345

* 25-37 635-940 365 0.203 49.664 2377.916 0.055 2.633 0.071 3.399 1.628 77.940 47.91 2293.943 4607.706 220618.1475 0.231 0.230 0.232

13-25 330-635 364 0.118 54.971 2632.045 0.026 1.245 0.056 2.681 0.000 0.000 54.87 2627.190 4662.576 223245.3372 0.119 0.118 0.120

* 0-13 0-330 363 0.044 64.543 3090.321 0.001 0.048 0.000 0.000 1.072 51.314 63.47 3038.960 4726.046 226284.2971 0.06 0.057 0.063

Results for RBHT Test 1595

Valid Time Period 4800 to 4905 seconds

Collapsed Liquid Level = 83.508 inches = 2121.11 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-89 Data Results for RBHT Test 1595

D for Time Period 4800 to 4905 seconds
A-270

Table A-90 Energy Balance Results for RBHT Test 1595D for Time Period 4800 to 4905 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1738.2622 5.4835 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.25 6.35 1834.8323 5.7881 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.50 12.70 1931.4024 6.0927 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

0.75 19.05 2027.9725 6.3974 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

1.00 25.40 2124.5427 6.702 0.00E+00 0.00E+00 0.00E+00 4.20E-02 1.90E-02

1.25 31.75 2221.1128 7.0067 1.92E-03 6.46E-02 2.93E-02 4.19E-02 1.90E-02

1.50 38.10 2317.6829 7.3113 7.60E-03 2.56E-01 1.16E-01 4.17E-02 1.89E-02

1.75 44.45 2414.253 7.6159 1.35E-02 4.56E-01 2.07E-01 4.14E-02 1.88E-02

2.00 50.80 2510.8231 7.9206 1.97E-02 6.64E-01 3.01E-01 4.11E-02 1.87E-02

2.25 57.15 2607.3933 8.2252 2.61E-02 8.80E-01 3.99E-01 4.09E-02 1.85E-02

2.50 63.50 2703.9634 8.5298 3.28E-02 1.10E+00 5.01E-01 4.06E-02 1.84E-02

2.75 69.85 2800.5335 8.8345 3.96E-02 1.34E+00 6.06E-01 4.03E-02 1.83E-02

3.00 76.20 2897.1036 9.1391 4.68E-02 1.58E+00 7.16E-01 4.00E-02 1.81E-02

3.25 82.55 2993.6737 9.4438 5.42E-02 1.83E+00 8.28E-01 3.97E-02 1.80E-02

3.50 88.90 3090.2439 9.7484 6.18E-02 2.08E+00 9.45E-01 3.94E-02 1.79E-02

3.75 95.25 3186.814 10.053 6.96E-02 2.35E+00 1.07E+00 3.91E-02 1.77E-02

4.00 101.60 3283.3841 10.358 7.77E-02 2.62E+00 1.19E+00 3.87E-02 1.76E-02

4.25 107.95 3379.9542 10.662 8.61E-02 2.90E+00 1.32E+00 3.84E-02 1.74E-02

4.50 114.30 3476.5243 10.967 9.47E-02 3.19E+00 1.45E+00 3.80E-02 1.72E-02

4.75 120.65 3573.0945 11.272 1.04E-01 3.49E+00 1.58E+00 3.76E-02 1.71E-02

5.00 127.00 3669.6646 11.576 1.13E-01 3.80E+00 1.72E+00 3.72E-02 1.69E-02

5.25 133.35 3766.2347 11.881 1.22E-01 4.11E+00 1.86E+00 3.69E-02 1.67E-02

5.50 139.70 3862.8048 12.185 1.31E-01 4.43E+00 2.01E+00 3.65E-02 1.65E-02

5.75 146.05 3959.375 12.49 1.41E-01 4.76E+00 2.16E+00 3.60E-02 1.64E-02

6.00 152.40 4055.9451 12.795 1.51E-01 5.10E+00 2.31E+00 3.56E-02 1.62E-02

6.25 158.75 4152.5152 13.099 1.62E-01 5.45E+00 2.47E+00 3.52E-02 1.60E-02

6.50 165.10 4249.0853 13.404 1.72E-01 5.80E+00 2.63E+00 3.48E-02 1.58E-02

6.75 171.45 4345.6554 13.709 1.83E-01 6.17E+00 2.80E+00 3.43E-02 1.56E-02

7.00 177.80 4442.2256 14.013 1.94E-01 6.54E+00 2.96E+00 3.38E-02 1.54E-02

7.25 184.15 4538.7957 14.318 2.05E-01 6.92E+00 3.14E+00 3.34E-02 1.51E-02

7.50 190.50 4635.3658 14.623 2.17E-01 7.30E+00 3.31E+00 3.29E-02 1.49E-02

7.75 196.85 4731.9359 14.927 2.28E-01 7.70E+00 3.49E+00 3.24E-02 1.47E-02

8.00 203.20 4828.506 15.232 2.40E-01 8.10E+00 3.67E+00 3.19E-02 1.45E-02

8.25 209.55 4925.0762 15.537 2.53E-01 8.52E+00 3.86E+00 3.14E-02 1.42E-02

8.50 215.90 5021.6463 15.841 2.65E-01 8.93E+00 4.05E+00 3.09E-02 1.40E-02

8.75 222.25 5118.2164 16.146 2.78E-01 9.36E+00 4.25E+00 3.03E-02 1.38E-02

9.00 228.60 5214.7865 16.45 2.91E-01 9.80E+00 4.45E+00 2.98E-02 1.35E-02

9.25 234.95 4925.0762 15.537 3.03E-01 1.02E+01 4.64E+00 2.92E-02 1.33E-02

9.50 241.30 4635.3658 14.623 3.15E-01 1.06E+01 4.82E+00 2.87E-02 1.30E-02

9.75 247.65 4345.6554 13.709 3.27E-01 1.10E+01 5.00E+00 2.83E-02 1.28E-02

10.00 254.00 4055.9451 12.795 3.37E-01 1.14E+01 5.16E+00 2.78E-02 1.26E-02

10.25 260.35 3766.2347 11.881 3.47E-01 1.17E+01 5.31E+00 2.74E-02 1.24E-02

10.50 266.70 3476.5243 10.967 3.56E-01 1.20E+01 5.44E+00 2.70E-02 1.23E-02

10.75 273.05 3186.814 10.053 3.64E-01 1.23E+01 5.57E+00 2.67E-02 1.21E-02

11.00 279.40 2897.1036 9.1391 3.72E-01 1.25E+01 5.69E+00 2.64E-02 1.20E-02

11.25 285.75 2607.3933 8.2252 3.79E-01 1.28E+01 5.79E+00 2.61E-02 1.18E-02

11.50 292.10 2317.6829 7.3113 3.85E-01 1.30E+01 5.89E+00 2.58E-02 1.17E-02

11.75 298.45 2027.9725 6.3974 3.90E-01 1.32E+01 5.97E+00 2.56E-02 1.16E-02

12.00 304.80 1738.2622 5.4835 3.95E-01 1.33E+01 6.04E+00 2.54E-02 1.15E-02

Results for RBHT Test 1595

Valid Time Period 4800 to 4905 seconds
A-271

Figure A-225 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595D for Time Period 4800 to 4905 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-272

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-E 

Test Conditions

Date: 6/16/2003

Steady-state time window: 6397 – 6580 seconds

Inlet flow rate: 0.765 cm/sec (0.301 in./sec) 

Inlet mass flow rate: 0.035 kg/sec (0.078 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-273

Figure A-226 Inlet Flow Plot for Experiment 1595E 

Figure A-227 Inlet Temperature Plot for Experiment 1595E 
A-274

Figure A-228 System Pressure Plot for Experiment 1595E 

Figure A-229 Bundle Power Plot for Experiment 1595E 
A-275

Table A-91: Data Results for RBHT Test 1595 for Time Period 6397 to 6580 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.709 16.608 795.208 0.155 7.421 0.032 1.532 0.000 0.000 16.42 786.194 4336.42 207628.9041 0.713 0.709 0.717

* 120-133 3048-3378 383 0.705 19.948 955.095 0.172 8.235 0.058 2.777 -0.012 -0.595 19.73 944.677 4356.15 208573.5815 0.708 0.704 0.712

* 108-120 2743-3048 382 0.596 25.177 1205.494 0.144 6.895 0.072 3.447 6.141 294.045 18.82 901.106 4374.97 209474.688 0.698 0.695 0.701

100-108 2540-2743 381 0.690 12.890 617.169 0.086 4.118 0.053 2.538 0.000 0.000 12.75 610.473 4387.72 210085.1612 0.693 0.690 0.696

97-100 2464-2540 380 0.535 7.245 346.878 0.030 1.436 0.019 0.910 0.000 0.000 7.193 344.403 4394.913 210429.5639 0.538 0.535 0.541

93-97 2362-2464 379 0.573 8.870 424.708 0.038 1.819 0.025 1.197 0.000 0.000 8.805 421.586 4403.718 210851.1496 0.576 0.573 0.579

* 85-93 2159-2362 378 0.424 23.920 1145.319 0.071 3.399 0.048 2.298 8.361 400.350 15.44 739.271 4419.158 211590.4208 0.628 0.625 0.631

81-85 2057-2159 377 0.678 6.694 320.520 0.033 1.580 0.023 1.101 0.000 0.000 6.638 317.829 4425.796 211908.2499 0.68 0.677 0.683

78-81 1981-2057 376 0.667 5.183 248.161 0.023 1.101 0.017 0.814 0.000 0.000 5.139 246.057 4430.935 212154.3066 0.67 0.667 0.673

75-78 1905-1981 375 0.537 7.219 345.635 0.022 1.053 0.016 0.766 0.000 0.000 7.177 343.637 4438.112 212497.9432 0.539 0.536 0.542

72-75 1829-1905 374 0.466 8.320 398.350 0.021 1.005 0.016 0.766 0.000 0.000 8.278 396.353 4446.39 212894.2959 0.469 0.467 0.471

* 67-72 1702-1829 373 0.387 15.918 762.137 0.034 1.628 0.026 1.245 3.868 185.180 11.99 574.084 4458.38 213468.3802 0.538 0.535 0.541

63-67 1600-1702 372 0.606 8.190 392.134 0.025 1.197 0.020 0.958 0.000 0.000 8.141 389.793 4466.521 213858.1734 0.608 0.605 0.611

60-63 1524-1600 371 0.414 9.130 437.141 0.018 0.862 0.015 0.718 0.000 0.000 9.096 435.519 4475.617 214293.6922 0.416 0.414 0.418

57-60 1448-1524 370 0.407 9.244 442.611 0.017 0.814 0.014 0.670 0.000 0.000 9.209 440.929 4484.826 214734.6215 0.409 0.407 0.411

53-57 1346-1448 369 0.391 12.661 606.228 0.021 1.005 0.018 0.862 0.000 0.000 12.62 604.249 4497.446 215338.8703 0.392 0.390 0.394

* 46-53 1168-1346 368 0.289 25.847 1237.571 0.033 1.580 0.030 1.436 5.844 279.822 19.94 954.732 4517.386 216293.6026 0.451 0.449 0.453

43-46 1092-1168 367 0.508 7.660 366.771 0.013 0.622 0.012 0.575 0.000 0.000 7.632 365.422 4525.018 216659.0248 0.51 0.507 0.513

37-43 940-1092 366 0.377 19.423 929.981 0.023 1.101 0.024 1.149 0.000 0.000 19.37 927.441 4544.388 217586.4653 0.378 0.376 0.380

* 25-37 635-940 365 0.238 47.519 2275.220 0.035 1.676 0.043 2.059 3.231 154.700 44.21 2116.786 4588.598 219703.2515 0.29 0.289 0.291

13-25 330-635 364 0.202 49.747 2381.895 0.020 0.958 0.037 1.772 0.000 0.000 49.68 2378.691 4638.278 222081.9427 0.203 0.202 0.204

* 0-13 0-330 363 0.047 64.319 3079.629 0.008 0.383 0.012 0.575 3.649 174.734 60.65 2903.938 4698.928 224985.8803 0.101 0.100 0.102

Results for RBHT Test 1595

Valid Time Period 6397 to 6580 seconds

Collapsed Liquid Level = 79.392 inches = 2016.55 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-91 Data Results for RBHT Test 1595

E for Time Period 6397 to 6580 seconds
A-276

Table A-92 Energy Balance Results for RBHT Test 1595E for Time Period 6397 to 6580 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1735.7464 5.4755 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.25 6.35 1832.1768 5.7797 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.50 12.70 1928.6071 6.0839 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.75 19.05 2025.0375 6.3881 8.96E-04 1.82E-02 8.27E-03 2.51E-02 1.14E-02

1.00 25.40 2121.4678 6.6923 9.56E-03 1.95E-01 8.82E-02 2.49E-02 1.13E-02

1.25 31.75 2217.8982 6.9965 1.86E-02 3.79E-01 1.72E-01 2.47E-02 1.12E-02

1.50 38.10 2314.3286 7.3007 2.81E-02 5.72E-01 2.59E-01 2.44E-02 1.11E-02

1.75 44.45 2410.7589 7.6049 3.80E-02 7.73E-01 3.50E-01 2.42E-02 1.10E-02

2.00 50.80 2507.1893 7.9091 4.82E-02 9.82E-01 4.45E-01 2.39E-02 1.09E-02

2.25 57.15 2603.6196 8.2133 5.89E-02 1.20E+00 5.44E-01 2.37E-02 1.07E-02

2.50 63.50 2700.05 8.5175 7.00E-02 1.42E+00 6.46E-01 2.34E-02 1.06E-02

2.75 69.85 2796.4803 8.8217 8.15E-02 1.66E+00 7.52E-01 2.31E-02 1.05E-02

3.00 76.20 2892.9107 9.1259 9.33E-02 1.90E+00 8.62E-01 2.28E-02 1.03E-02

3.25 82.55 2989.3411 9.4301 1.06E-01 2.15E+00 9.75E-01 2.25E-02 1.02E-02

3.50 88.90 3085.7714 9.7343 1.18E-01 2.41E+00 1.09E+00 2.22E-02 1.01E-02

3.75 95.25 3182.2018 10.038 1.31E-01 2.67E+00 1.21E+00 2.18E-02 9.91E-03

4.00 101.60 3278.6321 10.343 1.45E-01 2.95E+00 1.34E+00 2.15E-02 9.76E-03

4.25 107.95 3375.0625 10.647 1.59E-01 3.23E+00 1.47E+00 2.12E-02 9.60E-03

4.50 114.30 3471.4928 10.951 1.73E-01 3.52E+00 1.60E+00 2.08E-02 9.43E-03

4.75 120.65 3567.9232 11.255 1.88E-01 3.82E+00 1.73E+00 2.04E-02 9.27E-03

5.00 127.00 3664.3535 11.559 2.03E-01 4.13E+00 1.87E+00 2.01E-02 9.09E-03

5.25 133.35 3760.7839 11.864 2.18E-01 4.45E+00 2.02E+00 1.97E-02 8.92E-03

5.50 139.70 3857.2143 12.168 2.34E-01 4.77E+00 2.16E+00 1.93E-02 8.74E-03

5.75 146.05 3953.6446 12.472 2.51E-01 5.10E+00 2.31E+00 1.89E-02 8.55E-03

6.00 152.40 4050.075 12.776 2.67E-01 5.44E+00 2.47E+00 1.84E-02 8.36E-03

6.25 158.75 4146.5053 13.08 2.84E-01 5.79E+00 2.63E+00 1.80E-02 8.16E-03

6.50 165.10 4242.9357 13.385 3.02E-01 6.15E+00 2.79E+00 1.76E-02 7.96E-03

6.75 171.45 4339.366 13.689 3.20E-01 6.51E+00 2.95E+00 1.71E-02 7.76E-03

7.00 177.80 4435.7964 13.993 3.38E-01 6.88E+00 3.12E+00 1.66E-02 7.55E-03

7.25 184.15 4532.2268 14.297 3.57E-01 7.27E+00 3.30E+00 1.62E-02 7.34E-03

7.50 190.50 4628.6571 14.601 3.76E-01 7.66E+00 3.47E+00 1.57E-02 7.12E-03

7.75 196.85 4725.0875 14.906 3.96E-01 8.05E+00 3.65E+00 1.52E-02 6.90E-03

8.00 203.20 4821.5178 15.21 4.16E-01 8.46E+00 3.84E+00 1.47E-02 6.67E-03

8.25 209.55 4917.9482 15.514 4.36E-01 8.87E+00 4.02E+00 1.42E-02 6.44E-03

8.50 215.90 5014.3785 15.818 4.57E-01 9.29E+00 4.22E+00 1.37E-02 6.20E-03

8.75 222.25 5110.8089 16.122 4.78E-01 9.73E+00 4.41E+00 1.31E-02 5.96E-03

9.00 228.60 5207.2393 16.427 4.99E-01 1.02E+01 4.61E+00 1.26E-02 5.71E-03

9.25 234.95 4917.9482 15.514 5.21E-01 1.06E+01 4.81E+00 1.21E-02 5.47E-03

9.50 241.30 4628.6571 14.601 5.40E-01 1.10E+01 4.99E+00 1.16E-02 5.24E-03

9.75 247.65 4339.366 13.689 5.59E-01 1.14E+01 5.16E+00 1.11E-02 5.03E-03

10.00 254.00 4050.075 12.776 5.77E-01 1.17E+01 5.32E+00 1.06E-02 4.83E-03

10.25 260.35 3760.7839 11.864 5.93E-01 1.21E+01 5.48E+00 1.02E-02 4.64E-03

10.50 266.70 3471.4928 10.951 6.08E-01 1.24E+01 5.61E+00 9.86E-03 4.47E-03

10.75 273.05 3182.2018 10.038 6.22E-01 1.27E+01 5.74E+00 9.51E-03 4.31E-03

11.00 279.40 2892.9107 9.1259 6.35E-01 1.29E+01 5.86E+00 9.19E-03 4.17E-03

11.25 285.75 2603.6196 8.2133 6.46E-01 1.32E+01 5.97E+00 8.90E-03 4.04E-03

11.50 292.10 2314.3286 7.3007 6.56E-01 1.34E+01 6.06E+00 8.64E-03 3.92E-03

11.75 298.45 2025.0375 6.3881 6.66E-01 1.35E+01 6.14E+00 8.41E-03 3.82E-03

12.00 304.80 1735.7464 5.4755 6.73E-01 1.37E+01 6.22E+00 8.22E-03 3.73E-03

Results for RBHT Test 1595

Valid Time Period 6397 to 6580 seconds
A-277

Figure A-230 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595E for Time Period 6397 to 6580 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-278

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-F 

Test Conditions

Date: 6/16/2003

Steady-state time window: 6742 – 6862 seconds

Inlet flow rate: 0.503 cm/sec (0.198 in./sec) 

Inlet mass flow rate: 0.023 kg/sec (0.051 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-279

Figure A-231 Inlet Flow Plot for Experiment 1595F 

Figure A-232 Inlet Temperature Plot for Experiment 1595F 
A-280

Figure A-233 System Pressure Plot for Experiment 1595F 

Figure A-234 Bundle Power Plot for Experiment 1595F 
A-281

Table A-93: Data Results for RBHT Test 1595 for Time Period 6742 to 6862 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.758 13.809 661.182 0.078 3.735 0.007 0.335 0.000 0.000 13.72 656.917 4333.72 207499.6274 0.76 0.756 0.764

* 120-133 3048-3378 383 0.731 18.166 869.806 0.103 4.932 0.038 1.819 0.845 40.472 17.18 822.583 4350.9 208322.2102 0.745 0.741 0.749

* 108-120 2743-3048 382 0.611 24.232 1160.238 0.091 4.357 0.047 2.250 6.444 308.544 17.65 845.087 4368.55 209167.2967 0.717 0.713 0.721

100-108 2540-2743 381 0.700 12.459 596.530 0.055 2.633 0.035 1.676 0.000 0.000 12.36 591.800 4380.91 209759.0967 0.702 0.698 0.706

97-100 2464-2540 380 0.559 6.871 328.975 0.019 0.910 0.013 0.622 0.000 0.000 6.838 327.405 4387.748 210086.5019 0.561 0.558 0.564

93-97 2362-2464 379 0.576 8.803 421.475 0.025 1.197 0.016 0.766 0.000 0.000 8.759 419.383 4396.507 210505.8851 0.578 0.575 0.581

* 85-93 2159-2362 378 0.429 23.723 1135.870 0.046 2.202 0.031 1.484 8.346 399.615 15.3 732.568 4411.807 211238.453 0.632 0.629 0.635

81-85 2057-2159 377 0.684 6.575 314.801 0.021 1.005 0.015 0.718 0.000 0.000 6.536 312.945 4418.343 211551.3984 0.685 0.682 0.68878-81 1981-2057 376 0.670 5.136 245.923 0.015 0.718 0.011 0.527 0.000 0.000 5.106 244.477 4423.449 211795.8749 0.672 0.669 0.67575-78 1905-1981 375 0.544 7.099 339.915 0.014 0.670 0.011 0.527 0.000 0.000 7.073 338.657 4430.522 212134.532 0.546 0.543 0.54972-75 1829-1905 374 0.479 8.112 388.404 0.014 0.670 0.011 0.527 0.000 0.000 8.084 387.064 4438.606 212521.596 0.481 0.479 0.483

* 67-72 1702-1829 373 0.390 15.834 758.158 0.021 1.005 0.017 0.814 4.086 195.661 11.71 560.678 4450.316 213082.2738 0.549 0.546 0.552

63-67 1600-1702 372 0.616 7.987 382.436 0.016 0.766 0.013 0.622 0.000 0.000 7.956 380.935 4458.272 213463.2091 0.617 0.614 0.62060-63 1524-1600 371 0.423 8.990 430.427 0.011 0.527 0.010 0.479 0.000 0.000 8.964 429.199 4467.236 213892.4078 0.424 0.422 0.42657-60 1448-1524 370 0.410 9.192 440.125 0.011 0.527 0.009 0.431 0.000 0.000 9.167 438.918 4476.403 214331.3261 0.411 0.409 0.41353-57 1346-1448 369 0.396 12.557 601.255 0.013 0.622 0.012 0.575 0.000 0.000 12.53 599.940 4488.933 214931.2657 0.397 0.395 0.399

* 46-53 1168-1346 368 0.287 25.930 1241.549 0.021 1.005 0.020 0.958 6.249 299.218 19.64 940.368 4508.573 215871.6339 0.46 0.458 0.462

43-46 1092-1168 367 0.521 7.458 357.073 0.008 0.383 0.008 0.383 0.000 0.000 7.437 356.085 4516.01 216227.7194 0.523 0.520 0.52637-43 940-1092 366 0.396 18.836 901.882 0.014 0.670 0.015 0.718 0.000 0.000 18.8 900.149 4534.81 217127.8682 0.397 0.395 0.399

* 25-37 635-940 365 0.250 46.745 2238.170 0.023 1.101 0.028 1.341 4.284 205.127 42.41 2030.602 4577.22 219158.4699 0.319 0.317 0.321

13-25 330-635 364 0.241 47.275 2263.534 0.014 0.670 0.024 1.149 0.000 0.000 47.22 2260.906 4624.44 221419.3757 0.242 0.241 0.243

* 0-13 0-330 363 0.061 63.374 3034.373 0.006 0.287 0.013 0.622 4.035 193.207 59.32 2840.257 4683.76 224259.6325 0.121 0.120 0.122

Results for RBHT Test 1595

Valid Time Period 6742 to 6862 seconds

Collapsed Liquid Level = 76.625 inches = 1946.27 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-93 Data Results for RBHT Test 1595

F for Time Period 6742 to 6862 seconds
A-282

Table A-94 Energy Balance Results for RBHT Test 1595F for Time Period 6742 to 6862 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1733.2725 5.4677 0.00E+00 0.00E+00 0.00E+00 1.65E-02 7.49E-03

0.25 6.35 1829.5654 5.7715 0.00E+00 0.00E+00 0.00E+00 1.65E-02 7.49E-03

0.50 12.70 1925.8583 6.0753 9.18E-04 1.23E-02 5.57E-03 1.65E-02 7.49E-03

0.75 19.05 2022.1512 6.379 1.35E-02 1.80E-01 8.16E-02 1.63E-02 7.39E-03

1.00 25.40 2118.4441 6.6828 2.66E-02 3.56E-01 1.61E-01 1.61E-02 7.29E-03

1.25 31.75 2214.7371 6.9865 4.04E-02 5.40E-01 2.45E-01 1.59E-02 7.19E-03

1.50 38.10 2311.03 7.2903 5.48E-02 7.32E-01 3.32E-01 1.56E-02 7.08E-03

1.75 44.45 2407.3229 7.5941 6.98E-02 9.33E-01 4.23E-01 1.54E-02 6.97E-03

2.00 50.80 2503.6158 7.8978 8.54E-02 1.14E+00 5.18E-01 1.51E-02 6.85E-03

2.25 57.15 2599.9087 8.2016 1.02E-01 1.36E+00 6.16E-01 1.48E-02 6.73E-03

2.50 63.50 2696.2016 8.5054 1.19E-01 1.58E+00 7.18E-01 1.46E-02 6.61E-03

2.75 69.85 2792.4946 8.8091 1.36E-01 1.82E+00 8.24E-01 1.43E-02 6.47E-03

3.00 76.20 2888.7875 9.1129 1.54E-01 2.06E+00 9.33E-01 1.40E-02 6.34E-03

3.25 82.55 2985.0804 9.4166 1.73E-01 2.31E+00 1.05E+00 1.37E-02 6.20E-03

3.50 88.90 3081.3733 9.7204 1.92E-01 2.57E+00 1.16E+00 1.33E-02 6.06E-03

3.75 95.25 3177.6662 10.024 2.12E-01 2.83E+00 1.28E+00 1.30E-02 5.91E-03

4.00 101.60 3273.9591 10.328 2.32E-01 3.11E+00 1.41E+00 1.27E-02 5.75E-03

4.25 107.95 3370.252 10.632 2.54E-01 3.39E+00 1.54E+00 1.23E-02 5.59E-03

4.50 114.30 3466.545 10.935 2.75E-01 3.68E+00 1.67E+00 1.20E-02 5.43E-03

4.75 120.65 3562.8379 11.239 2.98E-01 3.98E+00 1.80E+00 1.16E-02 5.26E-03

5.00 127.00 3659.1308 11.543 3.21E-01 4.28E+00 1.94E+00 1.12E-02 5.09E-03

5.25 133.35 3755.4237 11.847 3.44E-01 4.60E+00 2.09E+00 1.08E-02 4.91E-03

5.50 139.70 3851.7166 12.151 3.68E-01 4.92E+00 2.23E+00 1.04E-02 4.73E-03

5.75 146.05 3948.0095 12.454 3.93E-01 5.25E+00 2.38E+00 1.00E-02 4.55E-03

6.00 152.40 4044.3025 12.758 4.19E-01 5.59E+00 2.54E+00 9.61E-03 4.36E-03

6.25 158.75 4140.5954 13.062 4.45E-01 5.94E+00 2.69E+00 9.18E-03 4.16E-03

6.50 165.10 4236.8883 13.366 4.71E-01 6.30E+00 2.86E+00 8.74E-03 3.96E-03

6.75 171.45 4333.1812 13.669 4.99E-01 6.66E+00 3.02E+00 8.29E-03 3.76E-03

7.00 177.80 4429.4741 13.973 5.26E-01 7.03E+00 3.19E+00 7.82E-03 3.55E-03

7.25 184.15 4525.767 14.277 5.55E-01 7.41E+00 3.36E+00 7.36E-03 3.34E-03

7.50 190.50 4622.06 14.581 5.84E-01 7.80E+00 3.54E+00 6.87E-03 3.12E-03

7.75 196.85 4718.3529 14.884 6.14E-01 8.20E+00 3.72E+00 6.38E-03 2.90E-03

8.00 203.20 4814.6458 15.188 6.44E-01 8.60E+00 3.90E+00 5.88E-03 2.67E-03

8.25 209.55 4910.9387 15.492 6.75E-01 9.02E+00 4.09E+00 5.37E-03 2.44E-03

8.50 215.90 5007.2316 15.796 7.06E-01 9.44E+00 4.28E+00 4.85E-03 2.20E-03

8.75 222.25 5103.5245 16.099 7.39E-01 9.87E+00 4.48E+00 4.32E-03 1.96E-03

9.00 228.60 5199.8174 16.403 7.71E-01 1.03E+01 4.68E+00 3.78E-03 1.71E-03

9.25 234.95 4910.9387 15.492 8.04E-01 1.07E+01 4.87E+00 3.25E-03 1.47E-03

9.50 241.30 4622.06 14.581 8.34E-01 1.11E+01 5.05E+00 2.75E-03 1.25E-03

9.75 247.65 4333.1812 13.669 8.62E-01 1.15E+01 5.23E+00 2.27E-03 1.03E-03

10.00 254.00 4044.3025 12.758 8.89E-01 1.19E+01 5.39E+00 1.84E-03 8.33E-04

10.25 260.35 3755.4237 11.847 9.14E-01 1.22E+01 5.54E+00 1.43E-03 6.47E-04

10.50 266.70 3466.545 10.935 9.37E-01 1.25E+01 5.68E+00 1.05E-03 4.74E-04

10.75 273.05 3177.6662 10.024 9.58E-01 1.28E+01 5.81E+00 6.97E-04 3.16E-04

11.00 279.40 2888.7875 9.1129 9.77E-01 1.31E+01 5.92E+00 3.78E-04 1.72E-04

11.25 285.75 2599.9087 8.2016 9.95E-01 1.33E+01 6.03E+00 9.09E-05 4.12E-05

11.50 292.10 2311.03 7.2903 1.00E+00 1.34E+01 6.06E+00 0.00E+00 0.00E+00

11.75 298.45 2022.1512 6.379 1.00E+00 1.34E+01 6.06E+00 0.00E+00 0.00E+00

12.00 304.80 1733.2725 5.4677 1.00E+00 1.34E+01 6.06E+00 0.00E+00 0.00E+00

Results for RBHT Test 1595

Valid Time Period 6742 to 6862 seconds
A-283

Figure A-235 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595F for Time Period 6742 to 6862 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-284

RBHT Two-Phase Mixture Level and Uncovery Test INT-1595-G 

Test Conditions

Date: 6/16/2003

Steady-state time window: 7105 – 7225 seconds

Inlet flow rate: 0.373 cm/sec (0.147 in./sec) 

Inlet mass flow rate: 0.017 kg/sec (0.038 lbm/sec) 

Inlet flow temperature: 382.9 K (229.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.83 kW 
A-285

Figure A-236 Inlet Flow Plot for Experiment 1595G 

Figure A-237 Inlet Temperature Plot for Experiment 1595G 
A-286

Figure A-238 System Pressure Plot for Experiment 1595G 

Figure A-239 Bundle Power Plot for Experiment 1595G 
A-287

Table A-95: Data Results for RBHT Test 1595 for Time Period 7105 to 7225 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.950 2.856 136.762 0.029 1.389 0.000 0.000 0.000 0.000 2.825 135.262 4322.825 206977.972 0.951 0.946 0.956

* 120-133 3048-3378 383 0.904 6.481 310.325 0.034 1.628 0.000 0.000 -0.096 -4.583 6.543 313.281 4329.368 207291.2525 0.903 0.898 0.908

* 108-120 2743-3048 382 0.757 15.133 724.589 0.032 1.532 0.000 0.000 3.151 150.888 11.95 572.169 4341.318 207863.4216 0.808 0.804 0.812

100-108 2540-2743 381 0.760 9.992 478.418 0.035 1.676 0.013 0.622 0.000 0.000 9.941 475.978 4351.259 208339.3992 0.761 0.757 0.765

97-100 2464-2540 380 0.660 5.297 253.631 0.014 0.670 0.009 0.431 0.000 0.000 5.274 252.520 4356.533 208591.9197 0.661 0.658 0.664

93-97 2362-2464 379 0.652 7.234 346.381 0.018 0.862 0.012 0.575 0.000 0.000 7.201 344.786 4363.734 208936.7054 0.653 0.650 0.656

* 85-93 2159-2362 378 0.467 22.129 1059.532 0.034 1.628 0.024 1.149 8.681 415.638 13.39 641.117 4377.124 209577.822 0.678 0.675 0.681

81-85 2057-2159 377 0.701 6.222 297.892 0.016 0.766 0.011 0.527 0.000 0.000 6.191 296.427 4383.315 209874.2487 0.702 0.698 0.706

78-81 1981-2057 376 0.674 5.074 242.939 0.011 0.527 0.008 0.383 0.000 0.000 5.051 241.843 4388.366 210116.0919 0.676 0.673 0.679

75-78 1905-1981 375 0.559 6.876 329.223 0.011 0.527 0.008 0.383 0.000 0.000 6.855 328.219 4395.221 210444.3111 0.56 0.557 0.563

72-75 1829-1905 374 0.498 7.816 374.230 0.010 0.479 0.008 0.383 0.000 0.000 7.794 373.179 4403.015 210817.4898 0.5 0.498 0.503

* 67-72 1702-1829 373 0.394 15.736 753.434 0.016 0.766 0.013 0.622 4.427 211.956 11.28 540.089 4414.295 211357.5791 0.565 0.562 0.568

63-67 1600-1702 372 0.630 7.686 368.014 0.012 0.575 0.010 0.479 0.000 0.000 7.661 366.811 4421.956 211724.3897 0.631 0.628 0.634

60-63 1524-1600 371 0.437 8.777 420.232 0.008 0.383 0.007 0.335 0.000 0.000 8.757 419.287 4430.713 212143.6771 0.438 0.436 0.440

57-60 1448-1524 370 0.425 8.958 428.935 0.008 0.383 0.007 0.335 0.000 0.000 8.939 428.002 4439.652 212571.6788 0.426 0.424 0.428

53-57 1346-1448 369 0.407 12.329 590.314 0.010 0.479 0.009 0.431 0.000 0.000 12.31 589.406 4451.962 213161.0847 0.407 0.405 0.409

* 46-53 1168-1346 368 0.294 25.681 1229.614 0.016 0.766 0.015 0.718 6.390 305.956 19.26 922.174 4471.222 214083.2585 0.47 0.468 0.472

43-46 1092-1168 367 0.532 7.291 349.116 0.006 0.287 0.006 0.287 0.000 0.000 7.276 348.377 4478.498 214431.6352 0.533 0.530 0.536

37-43 940-1092 366 0.419 18.104 866.822 0.011 0.527 0.012 0.575 0.000 0.000 18.07 865.196 4496.568 215296.8315 0.42 0.418 0.422

* 25-37 635-940 365 0.262 46.013 2203.110 0.017 0.814 0.021 1.005 4.995 239.157 40.98 1962.133 4537.548 217258.9644 0.342 0.340 0.344

13-25 330-635 364 0.264 45.852 2195.401 0.012 0.575 0.018 0.862 0.000 0.000 45.81 2193.395 4583.358 219452.359 0.265 0.264 0.266

* 0-13 0-330 363 0.080 62.138 2975.193 0.006 0.287 0.014 0.670 3.558 170.367 58.56 2803.868 4641.918 222256.2268 0.132 0.131 0.133

 (Z2φ) Two-Phase Level (Dryout) = 124.70 inches = 3167.38 mm

 (S) Level Swell = 1.888

Results for RBHT Test 1595

Valid Time Period 7105 to 7225 seconds

Collapsed Liquid Level = 66.932 inches = 1700.06 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-95 Data Results for RBHT Test 1595

G for Time Period 7105 to 7225 seconds
A-288

Table A-96 Energy Balance Results for RBHT Test 1595G for Time Period 7105 to 7225 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1732.1093 5.4641 0.00E+00 0.00E+00 0.00E+00 1.23E-02 5.56E-03

0.25 6.35 1828.3376 5.7676 5.77E-03 5.80E-02 2.63E-02 1.22E-02 5.53E-03

0.50 12.70 1924.5659 6.0712 2.18E-02 2.19E-01 9.95E-02 1.20E-02 5.44E-03

0.75 19.05 2020.7942 6.3747 3.87E-02 3.89E-01 1.76E-01 1.18E-02 5.35E-03

1.00 25.40 2117.0225 6.6783 5.64E-02 5.67E-01 2.57E-01 1.16E-02 5.25E-03

1.25 31.75 2213.2508 6.9819 7.50E-02 7.53E-01 3.42E-01 1.13E-02 5.15E-03

1.50 38.10 2309.4791 7.2854 9.43E-02 9.48E-01 4.30E-01 1.11E-02 5.04E-03

1.75 44.45 2405.7074 7.589 1.15E-01 1.15E+00 5.22E-01 1.09E-02 4.93E-03

2.00 50.80 2501.9357 7.8925 1.36E-01 1.36E+00 6.18E-01 1.06E-02 4.81E-03

2.25 57.15 2598.164 8.1961 1.57E-01 1.58E+00 7.17E-01 1.03E-02 4.69E-03

2.50 63.50 2694.3923 8.4997 1.80E-01 1.81E+00 8.20E-01 1.01E-02 4.56E-03

2.75 69.85 2790.6206 8.8032 2.03E-01 2.04E+00 9.27E-01 9.77E-03 4.43E-03

3.00 76.20 2886.8489 9.1068 2.28E-01 2.29E+00 1.04E+00 9.47E-03 4.30E-03

3.25 82.55 2983.0772 9.4103 2.53E-01 2.54E+00 1.15E+00 9.16E-03 4.16E-03

3.50 88.90 3079.3055 9.7139 2.79E-01 2.80E+00 1.27E+00 8.85E-03 4.01E-03

3.75 95.25 3175.5338 10.017 3.06E-01 3.07E+00 1.39E+00 8.52E-03 3.86E-03

4.00 101.60 3271.7621 10.321 3.33E-01 3.35E+00 1.52E+00 8.18E-03 3.71E-03

4.25 107.95 3367.9904 10.625 3.62E-01 3.63E+00 1.65E+00 7.83E-03 3.55E-03

4.50 114.30 3464.2187 10.928 3.91E-01 3.93E+00 1.78E+00 7.47E-03 3.39E-03

4.75 120.65 3560.447 11.232 4.21E-01 4.23E+00 1.92E+00 7.10E-03 3.22E-03

5.00 127.00 3656.6753 11.535 4.52E-01 4.54E+00 2.06E+00 6.72E-03 3.05E-03

5.25 133.35 3752.9036 11.839 4.84E-01 4.86E+00 2.20E+00 6.33E-03 2.87E-03

5.50 139.70 3849.1319 12.142 5.16E-01 5.19E+00 2.35E+00 5.94E-03 2.69E-03

5.75 146.05 3945.3602 12.446 5.49E-01 5.52E+00 2.50E+00 5.53E-03 2.51E-03

6.00 152.40 4041.5885 12.749 5.84E-01 5.86E+00 2.66E+00 5.11E-03 2.32E-03

6.25 158.75 4137.8168 13.053 6.19E-01 6.22E+00 2.82E+00 4.68E-03 2.12E-03

6.50 165.10 4234.0451 13.357 6.54E-01 6.58E+00 2.98E+00 4.24E-03 1.92E-03

6.75 171.45 4330.2734 13.66 6.91E-01 6.94E+00 3.15E+00 3.79E-03 1.72E-03

7.00 177.80 4426.5016 13.964 7.29E-01 7.32E+00 3.32E+00 3.33E-03 1.51E-03

7.25 184.15 4522.7299 14.267 7.67E-01 7.71E+00 3.50E+00 2.86E-03 1.30E-03

7.50 190.50 4618.9582 14.571 8.06E-01 8.10E+00 3.67E+00 2.38E-03 1.08E-03

7.75 196.85 4715.1865 14.874 8.46E-01 8.50E+00 3.86E+00 1.89E-03 8.57E-04

8.00 203.20 4811.4148 15.178 8.87E-01 8.91E+00 4.04E+00 1.39E-03 6.31E-04

8.25 209.55 4907.6431 15.482 9.28E-01 9.33E+00 4.23E+00 8.81E-04 3.99E-04

8.50 215.90 5003.8714 15.785 9.71E-01 9.75E+00 4.42E+00 3.59E-04 1.63E-04

8.75 222.25 5100.0997 16.089 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

9.00 228.60 5196.328 16.392 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

9.25 234.95 4907.6431 15.482 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

9.50 241.30 4618.9582 14.571 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

9.75 247.65 4330.2734 13.66 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

10.00 254.00 4041.5885 12.749 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

10.25 260.35 3752.9036 11.839 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

10.50 266.70 3464.2187 10.928 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

10.75 273.05 3175.5338 10.017 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

11.00 279.40 2886.8489 9.1068 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

11.25 285.75 2598.164 8.1961 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

11.50 292.10 2309.4791 7.2854 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

11.75 298.45 2020.7942 6.3747 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

12.00 304.80 1732.1093 5.4641 1.00E+00 1.00E+01 4.56E+00 0.00E+00 0.00E+00

Results for RBHT Test 1595

Valid Time Period 7105 to 7225 seconds
A-289

Figure A-240 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1595G for Time Period 7105 to 7225 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-290

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-A 

Test Conditions

Date: 6/18/2003

Steady-state time window: 3150 – 3253 seconds

Inlet flow rate: 2.532 cm/sec (0.997 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.257 lbm/sec) 

Inlet flow temperature: 381.3 K (226.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.40 kW 
A-291

Figure A-241 Inlet Flow Plot for Experiment 1616A 

Figure A-242 Inlet Temperature Plot for Experiment 1616A 
A-292

Figure A-243 System Pressure Plot for Experiment 1616A 

Figure A-244 Bundle Power Plot for Experiment 1616A 
A-293

Table A-97: Data Results for RBHT Test 1616 for Time Period 3150 to 3253 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.751 14.204 680.080 0.747 35.767 0.163 7.804 0.000 0.000 13.29 636.329 4333.29 207479.0389 0.767 0.763 0.771

* 120-133 3048-3378 383 0.744 17.283 827.534 0.830 39.741 0.291 13.933 0.442 21.182 15.72 752.678 4349.01 208231.7165 0.767 0.763 0.771

* 108-120 2743-3048 382 0.678 20.093 962.058 0.696 33.325 0.363 17.381 4.514 216.131 14.52 695.221 4363.53 208926.9378 0.767 0.763 0.771

100-108 2540-2743 381 0.750 10.376 496.819 0.418 20.014 0.265 12.688 0.000 0.000 9.688 463.864 4373.218 209390.8018 0.767 0.763 0.771

97-100 2464-2540 380 0.667 5.188 248.409 0.147 7.038 0.096 4.597 0.000 0.000 4.943 236.672 4378.161 209627.4739 0.683 0.680 0.686

93-97 2362-2464 379 0.672 6.808 325.991 0.187 8.954 0.125 5.985 0.000 0.000 6.495 310.982 4384.656 209938.4561 0.687 0.684 0.690

* 85-93 2159-2362 378 0.494 21.007 1005.822 0.347 16.614 0.240 11.491 8.250 395.013 12.17 582.703 4396.826 210521.1589 0.707 0.703 0.711

81-85 2057-2159 377 0.714 5.946 284.713 0.160 7.661 0.115 5.506 0.000 0.000 5.672 271.577 4402.498 210792.7357 0.727 0.723 0.73178-81 1981-2057 376 0.750 3.895 186.493 0.114 5.458 0.084 4.022 0.000 0.000 3.696 176.965 4406.194 210969.7011 0.763 0.759 0.76775-78 1905-1981 375 0.599 6.248 299.136 0.109 5.219 0.082 3.926 0.000 0.000 6.054 289.867 4412.248 211259.5682 0.611 0.608 0.61472-75 1829-1905 374 0.529 7.333 351.105 0.104 4.980 0.080 3.830 0.000 0.000 7.144 342.057 4419.392 211601.6247 0.541 0.538 0.544

* 67-72 1702-1829 373 0.429 14.832 710.167 0.162 7.757 0.130 6.224 4.190 200.625 10.35 495.561 4429.742 212097.1854 0.601 0.598 0.604

63-67 1600-1702 372 0.651 7.260 347.624 0.120 5.746 0.100 4.788 0.000 0.000 7.04 337.077 4436.782 212434.2624 0.661 0.658 0.66460-63 1524-1600 371 0.479 8.112 388.404 0.084 4.022 0.073 3.495 0.000 0.000 7.953 380.792 4444.735 212815.0541 0.489 0.487 0.49157-60 1448-1524 370 0.457 8.465 405.312 0.079 3.783 0.071 3.399 0.000 0.000 8.314 398.076 4453.049 213213.1306 0.466 0.464 0.46853-57 1346-1448 369 0.428 11.877 568.681 0.098 4.692 0.092 4.405 0.000 0.000 11.68 559.241 4464.729 213772.372 0.437 0.435 0.439

* 46-53 1168-1346 368 0.325 24.554 1175.655 0.150 7.182 0.152 7.278 5.062 242.373 19.19 918.822 4483.919 214691.1941 0.472 0.470 0.474

43-46 1092-1168 367 0.499 7.811 373.982 0.056 2.681 0.062 2.969 0.000 0.000 7.69 368.199 4491.609 215059.3933 0.506 0.503 0.50937-43 940-1092 366 0.394 18.883 904.120 0.097 4.644 0.118 5.650 0.000 0.000 18.66 893.446 4510.269 215952.8389 0.401 0.399 0.403

* 25-37 635-940 365 0.230 47.992 2297.848 0.130 6.224 0.214 10.246 0.138 6.587 47.51 2274.791 4557.779 218227.6299 0.237 0.236 0.238

13-25 330-635 364 0.072 57.854 2770.050 0.050 2.394 0.088 4.213 0.000 0.000 57.7 2762.691 4615.479 220990.3207 0.074 0.070 0.078

* 0-13 0-330 363 0.043 64.631 3094.548 0.004 0.192 0.000 0.000 -0.373 -17.860 65 3112.217 4680.479 224102.5374 0.037 0.035 0.039

Results for RBHT Test 1616

Valid Time Period 3150 to 3253 seconds

Collapsed Liquid Level = 74.904 inches = 1902.57 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-97 Data Results for RBHT Test 1616

A for Time Period 3150 to 3253 seconds
A-294

Table A-98 Energy Balance Results for RBHT Test 1616A for Time Period 3150 to 3253 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2626.4439 8.2853 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

0.25 6.35 2772.3574 8.7456 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

0.50 12.70 2918.271 9.2059 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

0.75 19.05 3064.1845 9.6662 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

1.00 25.40 3210.0981 10.126 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

1.25 31.75 3356.0116 10.587 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

1.50 38.10 3501.9252 11.047 0.00E+00 0.00E+00 0.00E+00 8.34E-02 3.78E-02

1.75 44.45 3647.8387 11.507 2.28E-03 1.53E-01 6.96E-02 8.32E-02 3.77E-02

2.00 50.80 3793.7522 11.968 6.97E-03 4.70E-01 2.13E-01 8.28E-02 3.75E-02

2.25 57.15 3939.6658 12.428 1.18E-02 7.98E-01 3.62E-01 8.24E-02 3.74E-02

2.50 63.50 4085.5793 12.888 1.69E-02 1.14E+00 5.17E-01 8.19E-02 3.72E-02

2.75 69.85 4231.4929 13.349 2.21E-02 1.49E+00 6.77E-01 8.15E-02 3.70E-02

3.00 76.20 4377.4064 13.809 2.76E-02 1.86E+00 8.43E-01 8.11E-02 3.68E-02

3.25 82.55 4523.32 14.269 3.32E-02 2.24E+00 1.01E+00 8.06E-02 3.66E-02

3.50 88.90 4669.2335 14.729 3.90E-02 2.63E+00 1.19E+00 8.01E-02 3.63E-02

3.75 95.25 4815.1471 15.19 4.50E-02 3.03E+00 1.37E+00 7.96E-02 3.61E-02

4.00 101.60 4961.0606 15.65 5.11E-02 3.45E+00 1.56E+00 7.91E-02 3.59E-02

4.25 107.95 5106.9742 16.11 5.75E-02 3.87E+00 1.76E+00 7.86E-02 3.56E-02

4.50 114.30 5252.8877 16.571 6.40E-02 4.31E+00 1.96E+00 7.80E-02 3.54E-02

4.75 120.65 5398.8013 17.031 7.07E-02 4.77E+00 2.16E+00 7.75E-02 3.51E-02

5.00 127.00 5544.7148 17.491 7.76E-02 5.23E+00 2.37E+00 7.69E-02 3.49E-02

5.25 133.35 5690.6284 17.951 8.47E-02 5.71E+00 2.59E+00 7.63E-02 3.46E-02

5.50 139.70 5836.5419 18.412 9.19E-02 6.20E+00 2.81E+00 7.57E-02 3.43E-02

5.75 146.05 5982.4555 18.872 9.94E-02 6.70E+00 3.04E+00 7.51E-02 3.41E-02

6.00 152.40 6128.369 19.332 1.07E-01 7.21E+00 3.27E+00 7.44E-02 3.38E-02

6.25 158.75 6274.2826 19.793 1.15E-01 7.74E+00 3.51E+00 7.38E-02 3.35E-02

6.50 165.10 6420.1961 20.253 1.23E-01 8.28E+00 3.75E+00 7.31E-02 3.32E-02

6.75 171.45 6566.1097 20.713 1.31E-01 8.83E+00 4.01E+00 7.24E-02 3.29E-02

7.00 177.80 6712.0232 21.174 1.39E-01 9.40E+00 4.26E+00 7.17E-02 3.25E-02

7.25 184.15 6857.9368 21.634 1.48E-01 9.98E+00 4.53E+00 7.10E-02 3.22E-02

7.50 190.50 7003.8503 22.094 1.57E-01 1.06E+01 4.79E+00 7.03E-02 3.19E-02

7.75 196.85 7149.7638 22.554 1.66E-01 1.12E+01 5.06E+00 6.95E-02 3.15E-02

8.00 203.20 7295.6774 23.015 1.75E-01 1.18E+01 5.34E+00 6.88E-02 3.12E-02

8.25 209.55 7441.5909 23.475 1.84E-01 1.24E+01 5.63E+00 6.80E-02 3.09E-02

8.50 215.90 7587.5045 23.935 1.94E-01 1.30E+01 5.92E+00 6.72E-02 3.05E-02

8.75 222.25 7733.418 24.396 2.03E-01 1.37E+01 6.21E+00 6.64E-02 3.01E-02

9.00 228.60 7879.3316 24.856 2.13E-01 1.44E+01 6.51E+00 6.56E-02 2.98E-02

9.25 234.95 7441.5909 23.475 2.23E-01 1.50E+01 6.81E+00 6.48E-02 2.94E-02

9.50 241.30 7003.8503 22.094 2.32E-01 1.56E+01 7.08E+00 6.40E-02 2.90E-02

9.75 247.65 6566.1097 20.713 2.40E-01 1.62E+01 7.35E+00 6.33E-02 2.87E-02

10.00 254.00 6128.369 19.332 2.48E-01 1.67E+01 7.59E+00 6.27E-02 2.84E-02

10.25 260.35 5690.6284 17.951 2.56E-01 1.72E+01 7.82E+00 6.20E-02 2.81E-02

10.50 266.70 5252.8877 16.571 2.63E-01 1.77E+01 8.03E+00 6.15E-02 2.79E-02

10.75 273.05 4815.1471 15.19 2.69E-01 1.81E+01 8.23E+00 6.09E-02 2.76E-02

11.00 279.40 4377.4064 13.809 2.75E-01 1.85E+01 8.40E+00 6.04E-02 2.74E-02

11.25 285.75 3939.6658 12.428 2.80E-01 1.89E+01 8.56E+00 6.00E-02 2.72E-02

11.50 292.10 3501.9252 11.047 2.85E-01 1.92E+01 8.71E+00 5.96E-02 2.70E-02

11.75 298.45 3064.1845 9.6662 2.89E-01 1.95E+01 8.83E+00 5.93E-02 2.69E-02

12.00 304.80 2626.4439 8.2853 2.92E-01 1.97E+01 8.94E+00 5.90E-02 2.68E-02

Results for RBHT Test 1616

Valid Time Period 3150 to 3253 seconds
A-295

Figure A-245 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616A for Time Period 3150 to 3253 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-296

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-B 

Test Conditions

Date: 6/18/2003

Steady-state time window: 3570 – 3659 seconds

Inlet flow rate: 2.553 cm/sec (1.005 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.259 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-297

Figure A-246 Inlet Flow Plot for Experiment 1616B 

Figure A-247 Inlet Temperature Plot for Experiment 1616B 
A-298

Figure A-248 System Pressure Plot for Experiment 1616B 

Figure A-249 Bundle Power Plot for Experiment 1616B 
A-299

Table A-99: Data Results for RBHT Test 1616 for Time Period 3570 to 3659 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.600 22.871 1095.090 0.537 25.712 0.109 5.219 0.000 0.000 22.22 1063.899 4342.22 207906.6096 0.611 0.608 0.614

* 120-133 3048-3378 383 0.645 23.952 1146.811 0.598 28.632 0.194 9.289 -2.730 -130.730 25.89 1239.620 4368.11 209146.2294 0.617 0.614 0.620

* 108-120 2743-3048 382 0.543 28.470 1363.143 0.501 23.988 0.242 11.587 4.527 216.746 23.2 1110.822 4391.31 210257.0514 0.628 0.625 0.631

100-108 2540-2743 381 0.622 15.725 752.936 0.301 14.412 0.177 8.475 0.000 0.000 15.24 729.695 4406.55 210986.7465 0.633 0.630 0.636

97-100 2464-2540 380 0.486 8.003 383.182 0.106 5.075 0.064 3.064 0.000 0.000 7.833 375.046 4414.383 211361.7925 0.497 0.495 0.499

93-97 2362-2464 379 0.522 9.924 475.185 0.135 6.464 0.083 3.974 0.000 0.000 9.704 464.630 4424.087 211826.4226 0.533 0.530 0.536

* 85-93 2159-2362 378 0.396 25.115 1202.510 0.248 11.874 0.160 7.661 7.227 346.028 17.48 836.947 4441.567 212663.3694 0.579 0.576 0.582

81-85 2057-2159 377 0.616 7.972 381.690 0.114 5.458 0.077 3.687 0.000 0.000 7.777 372.365 4449.344 213035.7342 0.626 0.623 0.629

78-81 1981-2057 376 0.614 6.019 288.195 0.081 3.878 0.056 2.681 0.000 0.000 5.879 281.488 4455.223 213317.2222 0.623 0.620 0.626

75-78 1905-1981 375 0.460 8.413 402.826 0.077 3.687 0.055 2.633 0.000 0.000 8.279 396.401 4463.502 213713.6229 0.468 0.466 0.470

72-75 1829-1905 374 0.355 10.054 481.402 0.073 3.495 0.054 2.586 0.000 0.000 9.925 475.212 4473.427 214188.8344 0.363 0.361 0.365

* 67-72 1702-1829 373 0.375 16.229 777.056 0.113 5.410 0.087 4.166 1.279 61.246 14.75 706.234 4488.177 214895.0682 0.432 0.430 0.434

63-67 1600-1702 372 0.494 10.516 503.532 0.083 3.974 0.067 3.208 0.000 0.000 10.37 496.518 4498.547 215391.5865 0.501 0.498 0.50460-63 1524-1600 371 0.347 10.174 487.121 0.058 2.777 0.049 2.346 0.000 0.000 10.06 481.675 4508.607 215873.2619 0.354 0.352 0.356

57-60 1448-1524 370 0.335 10.366 496.321 0.054 2.586 0.047 2.250 0.000 0.000 10.26 491.251 4518.867 216364.5133 0.341 0.339 0.343

53-57 1346-1448 369 0.317 14.193 679.582 0.065 3.112 0.061 2.921 0.000 0.000 14.06 673.196 4532.927 217037.7097 0.323 0.321 0.325

* 46-53 1168-1346 368 0.233 27.893 1335.542 0.097 4.644 0.102 4.884 3.154 151.032 24.54 1174.982 4557.467 218212.6912 0.325 0.323 0.327

43-46 1092-1168 367 0.322 10.563 505.770 0.035 1.676 0.041 1.963 0.000 0.000 10.49 502.264 4567.957 218714.9551 0.327 0.325 0.329

37-43 940-1092 366 0.222 24.248 1160.984 0.056 2.681 0.079 3.783 0.000 0.000 24.1 1153.914 4592.057 219868.8693 0.226 0.225 0.227

* 25-37 635-940 365 0.068 58.072 2780.493 0.059 2.825 0.114 5.458 4.309 206.307 53.59 2565.903 4645.647 222434.7723 0.14 0.139 0.141

13-25 330-635 364 0.053 59.007 2825.252 0.004 0.192 0.000 0.000 0.000 0.000 58.98 2823.978 4704.627 225258.7498 0.053 0.050 0.056

* 0-13 0-330 363 0.042 64.662 3096.040 0.004 0.192 0.000 0.000 -1.032 -49.405 65.69 3145.254 4770.317 228404.0039 0.027 0.026 0.028

Results for RBHT Test 1616

Valid Time Period 3570 to 3659 seconds

Collapsed Liquid Level = 91.229 inches = 2317.22 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-99 Data Results for RBHT Test 1616

B for Time Period 3570 to 3659 seconds
A-300

Table A-100 Energy Balance Results for RBHT Test 1616B for Time Period 3570 to 3659 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1739.5551 5.4876 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.25 6.35 1836.197 5.7924 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.50 12.70 1932.839 6.0973 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.75 19.05 2029.4809 6.4021 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.00 25.40 2126.1229 6.707 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.25 31.75 2222.7648 7.0119 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.50 38.10 2319.4067 7.3167 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.75 44.45 2416.0487 7.6216 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

2.00 50.80 2512.6906 7.9265 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

2.25 57.15 2609.3326 8.2313 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

2.50 63.50 2705.9745 8.5362 2.65E-03 1.80E-01 8.17E-02 8.38E-02 3.80E-02

2.75 69.85 2802.6165 8.8411 6.10E-03 4.14E-01 1.88E-01 8.35E-02 3.79E-02

3.00 76.20 2899.2584 9.1459 9.66E-03 6.56E-01 2.98E-01 8.32E-02 3.78E-02

3.25 82.55 2995.9004 9.4508 1.34E-02 9.06E-01 4.11E-01 8.29E-02 3.76E-02

3.50 88.90 3092.5423 9.7556 1.72E-02 1.16E+00 5.28E-01 8.26E-02 3.75E-02

3.75 95.25 3189.1843 10.061 2.11E-02 1.43E+00 6.49E-01 8.23E-02 3.73E-02

4.00 101.60 3285.8262 10.365 2.51E-02 1.71E+00 7.74E-01 8.19E-02 3.72E-02

4.25 107.95 3382.4682 10.67 2.93E-02 1.99E+00 9.02E-01 8.16E-02 3.70E-02

4.50 114.30 3479.1101 10.975 3.36E-02 2.28E+00 1.03E+00 8.12E-02 3.68E-02

4.75 120.65 3575.7521 11.28 3.80E-02 2.58E+00 1.17E+00 8.08E-02 3.67E-02

5.00 127.00 3672.394 11.585 4.25E-02 2.89E+00 1.31E+00 8.05E-02 3.65E-02

5.25 133.35 3769.036 11.89 4.72E-02 3.20E+00 1.45E+00 8.01E-02 3.63E-02

5.50 139.70 3865.6779 12.195 5.20E-02 3.53E+00 1.60E+00 7.97E-02 3.61E-02

5.75 146.05 3962.3199 12.499 5.69E-02 3.86E+00 1.75E+00 7.93E-02 3.60E-02

6.00 152.40 4058.9618 12.804 6.19E-02 4.20E+00 1.91E+00 7.88E-02 3.58E-02

6.25 158.75 4155.6038 13.109 6.70E-02 4.55E+00 2.06E+00 7.84E-02 3.56E-02

6.50 165.10 4252.2457 13.414 7.23E-02 4.91E+00 2.23E+00 7.80E-02 3.54E-02

6.75 171.45 4348.8877 13.719 7.76E-02 5.27E+00 2.39E+00 7.75E-02 3.52E-02

7.00 177.80 4445.5296 14.024 8.31E-02 5.64E+00 2.56E+00 7.71E-02 3.49E-02

7.25 184.15 4542.1715 14.329 8.88E-02 6.03E+00 2.73E+00 7.66E-02 3.47E-02

7.50 190.50 4638.8135 14.633 9.45E-02 6.42E+00 2.91E+00 7.61E-02 3.45E-02

7.75 196.85 4735.4554 14.938 1.00E-01 6.82E+00 3.09E+00 7.56E-02 3.43E-02

8.00 203.20 4832.0974 15.243 1.06E-01 7.22E+00 3.27E+00 7.51E-02 3.41E-02

8.25 209.55 4928.7393 15.548 1.12E-01 7.63E+00 3.46E+00 7.46E-02 3.38E-02

8.50 215.90 5025.3813 15.853 1.19E-01 8.06E+00 3.66E+00 7.41E-02 3.36E-02

8.75 222.25 5122.0232 16.158 1.25E-01 8.49E+00 3.85E+00 7.35E-02 3.34E-02

9.00 228.60 5218.6652 16.463 1.32E-01 8.93E+00 4.05E+00 7.30E-02 3.31E-02

9.25 234.95 4928.7393 15.548 1.38E-01 9.36E+00 4.24E+00 7.25E-02 3.29E-02

9.50 241.30 4638.8135 14.633 1.44E-01 9.76E+00 4.43E+00 7.20E-02 3.26E-02

9.75 247.65 4348.8877 13.719 1.49E-01 1.01E+01 4.60E+00 7.15E-02 3.24E-02

10.00 254.00 4058.9618 12.804 1.55E-01 1.05E+01 4.76E+00 7.10E-02 3.22E-02

10.25 260.35 3769.036 11.89 1.60E-01 1.08E+01 4.92E+00 7.06E-02 3.20E-02

10.50 266.70 3479.1101 10.975 1.64E-01 1.11E+01 5.05E+00 7.02E-02 3.19E-02

10.75 273.05 3189.1843 10.061 1.68E-01 1.14E+01 5.18E+00 6.99E-02 3.17E-02

11.00 279.40 2899.2584 9.1459 1.72E-01 1.17E+01 5.30E+00 6.96E-02 3.16E-02

11.25 285.75 2609.3326 8.2313 1.76E-01 1.19E+01 5.41E+00 6.93E-02 3.14E-02

11.50 292.10 2319.4067 7.3167 1.79E-01 1.21E+01 5.50E+00 6.90E-02 3.13E-02

11.75 298.45 2029.4809 6.4021 1.81E-01 1.23E+01 5.58E+00 6.88E-02 3.12E-02

12.00 304.80 1739.5551 5.4876 1.84E-01 1.25E+01 5.66E+00 6.86E-02 3.11E-02

Results for RBHT Test 1616

Valid Time Period 3570 to 3659 seconds
A-301

Figure A-250 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616B for Time Period 3570 to 3659 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-302

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-C 

Test Conditions

Date: 6/18/2003

Steady-state time window: 3800 – 3890 seconds

Inlet flow rate: 2.548 cm/sec (1.003 in./sec)

Inlet mass flow rate: 0.117 kg/sec (0.259 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-303

Figure A-251 Inlet Flow Plot for Experiment 1616C 

Figure A-252 Inlet Temperature Plot for Experiment 1616C 
A-304

Figure A-253 System Pressure Plot for Experiment 1616C 

Figure A-254 Bundle Power Plot for Experiment 1616C 
A-305

Table A-101: Data Results for RBHT Test 1616 for Time Period 3800 to 3890 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.599 22.918 1097.328 0.536 25.664 0.108 5.171 0.000 0.000 22.27 1066.293 4342.27 207909.0036 0.61 0.607 0.613

* 120-133 3048-3378 383 0.645 23.936 1146.065 0.596 28.537 0.194 9.289 -2.734 -130.902 25.88 1239.141 4368.15 209148.1446 0.617 0.614 0.620

* 108-120 2743-3048 382 0.546 28.324 1356.181 0.500 23.940 0.242 11.587 4.482 214.620 23.1 1106.034 4391.25 210254.1786 0.629 0.626 0.632

100-108 2540-2743 381 0.624 15.611 747.466 0.300 14.364 0.177 8.475 0.000 0.000 15.13 724.428 4406.38 210978.6068 0.636 0.633 0.639

97-100 2464-2540 380 0.483 8.055 385.669 0.105 5.027 0.064 3.064 0.000 0.000 7.881 377.344 4414.261 211355.9511 0.494 0.492 0.496

93-97 2362-2464 379 0.522 9.924 475.185 0.134 6.416 0.083 3.974 0.000 0.000 9.702 464.534 4423.963 211820.4854 0.533 0.530 0.536

* 85-93 2159-2362 378 0.395 25.131 1203.256 0.248 11.874 0.160 7.661 7.253 347.253 17.47 836.468 4441.433 212656.9535 0.579 0.576 0.582

81-85 2057-2159 377 0.617 7.956 380.944 0.113 5.410 0.077 3.687 0.000 0.000 7.766 371.838 4449.199 213028.7916 0.626 0.623 0.629

78-81 1981-2057 376 0.614 6.014 287.946 0.081 3.878 0.056 2.681 0.000 0.000 5.876 281.344 4455.075 213310.136 0.623 0.620 0.626

75-78 1905-1981 375 0.463 8.372 400.837 0.077 3.687 0.055 2.633 0.000 0.000 8.238 394.438 4463.313 213704.5735 0.471 0.469 0.473

72-75 1829-1905 374 0.350 10.122 484.634 0.073 3.495 0.053 2.538 0.000 0.000 9.992 478.420 4473.305 214182.993 0.358 0.356 0.360

* 67-72 1702-1829 373 0.386 15.933 762.883 0.113 5.410 0.086 4.118 0.904 43.290 14.83 710.064 4488.135 214893.0573 0.429 0.427 0.431

63-67 1600-1702 372 0.492 10.563 505.770 0.083 3.974 0.067 3.208 0.000 0.000 10.41 498.433 4498.545 215391.4907 0.499 0.497 0.50160-63 1524-1600 371 0.345 10.200 488.364 0.057 2.729 0.048 2.298 0.000 0.000 10.09 483.112 4508.635 215874.6025 0.352 0.350 0.354

57-60 1448-1524 370 0.335 10.366 496.321 0.053 2.538 0.047 2.250 0.000 0.000 10.26 491.251 4518.895 216365.854 0.341 0.339 0.343

53-57 1346-1448 369 0.316 14.209 680.328 0.065 3.112 0.061 2.921 0.000 0.000 14.08 674.154 4532.975 217040.008 0.322 0.320 0.324

* 46-53 1168-1346 368 0.235 27.795 1330.817 0.097 4.644 0.101 4.836 3.077 147.313 24.52 1174.024 4557.495 218214.0319 0.325 0.323 0.327

43-46 1092-1168 367 0.324 10.537 504.527 0.034 1.628 0.041 1.963 0.000 0.000 10.46 500.827 4567.955 218714.8594 0.328 0.326 0.330

37-43 940-1092 366 0.224 24.175 1157.503 0.056 2.681 0.079 3.783 0.000 0.000 24.03 1150.563 4591.985 219865.4219 0.229 0.228 0.230

* 25-37 635-940 365 0.071 57.916 2773.034 0.059 2.825 0.113 5.410 4.224 202.247 53.52 2562.551 4645.505 222427.9733 0.141 0.140 0.142

13-25 330-635 364 0.053 59.007 2825.252 0.004 0.192 0.000 0.000 0.000 0.000 58.98 2823.978 4704.485 225251.9509 0.053 0.050 0.056

* 0-13 0-330 363 0.042 64.673 3096.538 0.004 0.192 0.000 0.000 -1.021 -48.908 65.69 3145.254 4770.175 228397.2049 0.027 0.026 0.028

Results for RBHT Test 1616

Valid Time Period 3800 to 3890 seconds

Collapsed Liquid Level = 90.668 inches = 2302.98 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-101 Data Results for RBHT Test 1616

C for Time Period 3800 to 3890 seconds
A-306

Table A-102 Energy Balance Results for RBHT Test 1616C for Time Period 3800 to 3890 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1741.4702 5.4936 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

0.25 6.35 1838.2185 5.7988 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

0.50 12.70 1934.9669 6.104 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

0.75 19.05 2031.7152 6.4092 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

1.00 25.40 2128.4636 6.7144 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

1.25 31.75 2225.2119 7.0196 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

1.50 38.10 2321.9603 7.3248 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

1.75 44.45 2418.7086 7.63 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

2.00 50.80 2515.4569 7.9352 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

2.25 57.15 2612.2053 8.2404 0.00E+00 0.00E+00 0.00E+00 8.38E-02 3.80E-02

2.50 63.50 2708.9536 8.5456 2.60E-03 1.76E-01 7.98E-02 8.36E-02 3.79E-02

2.75 69.85 2805.702 8.8508 6.06E-03 4.10E-01 1.86E-01 8.33E-02 3.78E-02

3.00 76.20 2902.4503 9.156 9.63E-03 6.52E-01 2.96E-01 8.30E-02 3.77E-02

3.25 82.55 2999.1987 9.4612 1.33E-02 9.02E-01 4.09E-01 8.27E-02 3.75E-02

3.50 88.90 3095.947 9.7664 1.72E-02 1.16E+00 5.26E-01 8.24E-02 3.74E-02

3.75 95.25 3192.6954 10.072 2.11E-02 1.43E+00 6.47E-01 8.21E-02 3.72E-02

4.00 101.60 3289.4437 10.377 2.52E-02 1.70E+00 7.72E-01 8.17E-02 3.71E-02

4.25 107.95 3386.192 10.682 2.93E-02 1.99E+00 9.01E-01 8.14E-02 3.69E-02

4.50 114.30 3482.9404 10.987 3.36E-02 2.28E+00 1.03E+00 8.10E-02 3.68E-02

4.75 120.65 3579.6887 11.292 3.81E-02 2.58E+00 1.17E+00 8.07E-02 3.66E-02

5.00 127.00 3676.4371 11.598 4.26E-02 2.88E+00 1.31E+00 8.03E-02 3.64E-02

5.25 133.35 3773.1854 11.903 4.73E-02 3.20E+00 1.45E+00 7.99E-02 3.62E-02

5.50 139.70 3869.9338 12.208 5.21E-02 3.52E+00 1.60E+00 7.95E-02 3.61E-02

5.75 146.05 3966.6821 12.513 5.70E-02 3.86E+00 1.75E+00 7.91E-02 3.59E-02

6.00 152.40 4063.4304 12.818 6.20E-02 4.20E+00 1.90E+00 7.86E-02 3.57E-02

6.25 158.75 4160.1788 13.124 6.72E-02 4.55E+00 2.06E+00 7.82E-02 3.55E-02

6.50 165.10 4256.9271 13.429 7.25E-02 4.90E+00 2.22E+00 7.78E-02 3.53E-02

6.75 171.45 4353.6755 13.734 7.78E-02 5.27E+00 2.39E+00 7.73E-02 3.51E-02

7.00 177.80 4450.4238 14.039 8.34E-02 5.64E+00 2.56E+00 7.69E-02 3.49E-02

7.25 184.15 4547.1722 14.344 8.90E-02 6.02E+00 2.73E+00 7.64E-02 3.46E-02

7.50 190.50 4643.9205 14.65 9.48E-02 6.41E+00 2.91E+00 7.59E-02 3.44E-02

7.75 196.85 4740.6689 14.955 1.01E-01 6.81E+00 3.09E+00 7.54E-02 3.42E-02

8.00 203.20 4837.4172 15.26 1.07E-01 7.21E+00 3.27E+00 7.49E-02 3.40E-02

8.25 209.55 4934.1655 15.565 1.13E-01 7.63E+00 3.46E+00 7.44E-02 3.37E-02

8.50 215.90 5030.9139 15.87 1.19E-01 8.05E+00 3.65E+00 7.39E-02 3.35E-02

8.75 222.25 5127.6622 16.176 1.25E-01 8.49E+00 3.85E+00 7.33E-02 3.33E-02

9.00 228.60 5224.4106 16.481 1.32E-01 8.93E+00 4.05E+00 7.28E-02 3.30E-02

9.25 234.95 4934.1655 15.565 1.38E-01 9.35E+00 4.24E+00 7.23E-02 3.28E-02

9.50 241.30 4643.9205 14.65 1.44E-01 9.76E+00 4.43E+00 7.18E-02 3.25E-02

9.75 247.65 4353.6755 13.734 1.50E-01 1.01E+01 4.60E+00 7.13E-02 3.23E-02

10.00 254.00 4063.4304 12.818 1.55E-01 1.05E+01 4.76E+00 7.08E-02 3.21E-02

10.25 260.35 3773.1854 11.903 1.60E-01 1.08E+01 4.91E+00 7.04E-02 3.19E-02

10.50 266.70 3482.9404 10.987 1.65E-01 1.11E+01 5.05E+00 7.00E-02 3.18E-02

10.75 273.05 3192.6954 10.072 1.69E-01 1.14E+01 5.18E+00 6.97E-02 3.16E-02

11.00 279.40 2902.4503 9.156 1.73E-01 1.17E+01 5.30E+00 6.94E-02 3.15E-02

11.25 285.75 2612.2053 8.2404 1.76E-01 1.19E+01 5.41E+00 6.91E-02 3.13E-02

11.50 292.10 2321.9603 7.3248 1.79E-01 1.21E+01 5.50E+00 6.88E-02 3.12E-02

11.75 298.45 2031.7152 6.4092 1.82E-01 1.23E+01 5.58E+00 6.86E-02 3.11E-02

12.00 304.80 1741.4702 5.4936 1.84E-01 1.25E+01 5.65E+00 6.84E-02 3.10E-02

Results for RBHT Test 1616

Valid Time Period 3800 to 3890 seconds
A-307

Figure A-255 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616C for Time Period 3800 to 3890 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-308

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-D 

Test Conditions

Date: 6/18/2003

Steady-state time window: 4033 – 4170 seconds

Inlet flow rate: 1.770 cm/sec (0.697 in./sec) 

Inlet mass flow rate: 0.082 kg/sec (0.180 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-309

Figure A-256 Inlet Flow Plot for Experiment 1616D 

Figure A-257 Inlet Temperature Plot for Experiment 1616D 
A-310

Figure A-258 System Pressure Plot for Experiment 1616D 

Figure A-259 Bundle Power Plot for Experiment 1616D 
A-311

Table A-103: Data Results for RBHT Test 1616 for Time Period 4033 to 4170 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.634 20.882 999.854 0.368 17.620 0.075 3.591 0.000 0.000 20.43 978.194 4340.43 207820.9039 0.642 0.639 0.645

* 120-133 3048-3378 383 0.663 22.783 1090.863 0.409 19.583 0.135 6.464 -1.711 -81.916 23.95 1146.732 4364.38 208967.636 0.645 0.642 0.648

* 108-120 2743-3048 382 0.564 27.192 1301.973 0.343 16.423 0.168 8.044 4.941 236.590 21.74 1040.917 4386.12 210008.5528 0.651 0.648 0.654

100-108 2540-2743 381 0.646 14.702 703.951 0.206 9.863 0.123 5.889 0.000 0.000 14.37 688.039 4400.49 210696.5921 0.654 0.651 0.657

97-100 2464-2540 380 0.504 7.728 370.003 0.073 3.495 0.044 2.107 0.000 0.000 7.609 364.321 4408.099 211060.913 0.511 0.508 0.514

93-97 2362-2464 379 0.540 9.566 458.028 0.093 4.453 0.058 2.777 0.000 0.000 9.414 450.745 4417.513 211511.6577 0.547 0.544 0.550

* 85-93 2159-2362 378 0.407 24.637 1179.633 0.172 8.235 0.111 5.315 7.614 364.568 16.74 801.516 4434.253 212313.1732 0.597 0.594 0.600

81-85 2057-2159 377 0.641 7.458 357.073 0.079 3.783 0.053 2.538 0.000 0.000 7.325 350.723 4441.578 212663.8961 0.647 0.644 0.650

78-81 1981-2057 376 0.637 5.656 270.789 0.056 2.681 0.039 1.867 0.000 0.000 5.556 266.023 4447.134 212929.9188 0.643 0.640 0.646

75-78 1905-1981 375 0.497 7.842 375.474 0.054 2.586 0.038 1.819 0.000 0.000 7.745 370.833 4454.879 213300.7514 0.503 0.500 0.506

72-75 1829-1905 374 0.381 9.649 462.007 0.051 2.442 0.037 1.772 0.000 0.000 9.557 457.592 4464.436 213758.343 0.386 0.384 0.388

* 67-72 1702-1829 373 0.389 15.855 759.153 0.080 3.830 0.060 2.873 1.775 84.999 13.94 667.451 4478.376 214425.7938 0.463 0.461 0.465

63-67 1600-1702 372 0.535 9.670 463.001 0.059 2.825 0.046 2.202 0.000 0.000 9.563 457.879 4487.939 214883.6727 0.54 0.537 0.543

60-63 1524-1600 371 0.376 9.727 465.736 0.042 2.011 0.034 1.628 0.000 0.000 9.647 461.901 4497.586 215345.5736 0.381 0.379 0.383

57-60 1448-1524 370 0.361 9.961 476.926 0.039 1.867 0.033 1.580 0.000 0.000 9.885 473.296 4507.471 215818.8699 0.365 0.363 0.367

53-57 1346-1448 369 0.341 13.700 655.960 0.048 2.298 0.042 2.011 0.000 0.000 13.6 651.171 4521.071 216470.0414 0.345 0.343 0.347

* 46-53 1168-1346 368 0.271 26.507 1269.150 0.074 3.543 0.070 3.352 3.783 181.119 22.58 1081.136 4543.651 217551.1776 0.379 0.377 0.381

43-46 1092-1168 367 0.409 9.208 440.871 0.028 1.341 0.029 1.389 0.000 0.000 9.148 438.009 4552.799 217989.1862 0.413 0.411 0.415

37-43 940-1092 366 0.287 22.227 1064.256 0.048 2.298 0.055 2.633 0.000 0.000 22.12 1059.111 4574.919 219048.2975 0.29 0.289 0.291

* 25-37 635-940 365 0.153 52.816 2528.852 0.063 3.016 0.099 4.740 1.364 65.317 51.29 2455.778 4626.209 221504.0759 0.177 0.176 0.178

13-25 330-635 364 0.063 58.425 2797.402 0.024 1.149 0.037 1.772 0.000 0.000 58.34 2793.334 4684.549 224297.41 0.064 0.061 0.067

* 0-13 0-330 363 0.043 64.579 3092.062 0.002 0.096 0.000 0.000 -0.773 -37.009 65.35 3128.975 4749.899 227426.3848 0.032 0.030 0.034

Results for RBHT Test 1616

Valid Time Period 4033 to 4170 seconds

Collapsed Liquid Level = 86.403 inches = 2194.64 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-103 Data Results for RBHT Test 1616

D for Time Period 4033 to 4170 seconds
A-312

Table A-104 Energy Balance Results for RBHT Test 1616D for Time Period 4033 to 4170 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.3051 5.4899 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

0.25 6.35 1836.9887 5.7949 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

0.50 12.70 1933.6724 6.0999 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

0.75 19.05 2030.356 6.4049 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

1.00 25.40 2127.0396 6.7099 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

1.25 31.75 2223.7232 7.0149 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

1.50 38.10 2320.4068 7.3199 0.00E+00 0.00E+00 0.00E+00 5.83E-02 2.64E-02

1.75 44.45 2417.0904 7.6249 1.47E-03 6.93E-02 3.15E-02 5.82E-02 2.64E-02

2.00 50.80 2513.7741 7.9299 5.92E-03 2.79E-01 1.26E-01 5.80E-02 2.63E-02

2.25 57.15 2610.4577 8.2349 1.05E-02 4.96E-01 2.25E-01 5.77E-02 2.62E-02

2.50 63.50 2707.1413 8.5399 1.53E-02 7.22E-01 3.28E-01 5.74E-02 2.60E-02

2.75 69.85 2803.8249 8.8449 2.03E-02 9.56E-01 4.34E-01 5.71E-02 2.59E-02

3.00 76.20 2900.5085 9.1499 2.54E-02 1.20E+00 5.43E-01 5.68E-02 2.58E-02

3.25 82.55 2997.1921 9.4549 3.08E-02 1.45E+00 6.57E-01 5.65E-02 2.56E-02

3.50 88.90 3093.8758 9.7599 3.62E-02 1.71E+00 7.74E-01 5.62E-02 2.55E-02

3.75 95.25 3190.5594 10.065 4.19E-02 1.97E+00 8.95E-01 5.59E-02 2.53E-02

4.00 101.60 3287.243 10.37 4.77E-02 2.25E+00 1.02E+00 5.55E-02 2.52E-02

4.25 107.95 3383.9266 10.675 5.38E-02 2.53E+00 1.15E+00 5.52E-02 2.50E-02

4.50 114.30 3480.6102 10.98 5.99E-02 2.82E+00 1.28E+00 5.48E-02 2.49E-02

4.75 120.65 3577.2938 11.285 6.63E-02 3.12E+00 1.42E+00 5.44E-02 2.47E-02

5.00 127.00 3673.9775 11.59 7.28E-02 3.43E+00 1.56E+00 5.41E-02 2.45E-02

5.25 133.35 3770.6611 11.895 7.95E-02 3.75E+00 1.70E+00 5.37E-02 2.43E-02

5.50 139.70 3867.3447 12.2 8.64E-02 4.07E+00 1.85E+00 5.33E-02 2.42E-02

5.75 146.05 3964.0283 12.505 9.35E-02 4.40E+00 2.00E+00 5.28E-02 2.40E-02

6.00 152.40 4060.7119 12.81 1.01E-01 4.74E+00 2.15E+00 5.24E-02 2.38E-02

6.25 158.75 4157.3956 13.115 1.08E-01 5.09E+00 2.31E+00 5.20E-02 2.36E-02

6.50 165.10 4254.0792 13.42 1.16E-01 5.45E+00 2.47E+00 5.16E-02 2.34E-02

6.75 171.45 4350.7628 13.725 1.24E-01 5.82E+00 2.64E+00 5.11E-02 2.32E-02

7.00 177.80 4447.4464 14.03 1.31E-01 6.19E+00 2.81E+00 5.06E-02 2.30E-02

7.25 184.15 4544.13 14.335 1.40E-01 6.57E+00 2.98E+00 5.02E-02 2.28E-02

7.50 190.50 4640.8136 14.64 1.48E-01 6.96E+00 3.16E+00 4.97E-02 2.25E-02

7.75 196.85 4737.4973 14.945 1.56E-01 7.36E+00 3.34E+00 4.92E-02 2.23E-02

8.00 203.20 4834.1809 15.25 1.65E-01 7.77E+00 3.52E+00 4.87E-02 2.21E-02

8.25 209.55 4930.8645 15.555 1.74E-01 8.18E+00 3.71E+00 4.82E-02 2.18E-02

8.50 215.90 5027.5481 15.86 1.83E-01 8.60E+00 3.90E+00 4.77E-02 2.16E-02

8.75 222.25 5124.2317 16.165 1.92E-01 9.04E+00 4.10E+00 4.71E-02 2.14E-02

9.00 228.60 5220.9153 16.47 2.01E-01 9.47E+00 4.30E+00 4.66E-02 2.11E-02

9.25 234.95 4930.8645 15.555 2.10E-01 9.90E+00 4.49E+00 4.60E-02 2.09E-02

9.50 241.30 4640.8136 14.64 2.19E-01 1.03E+01 4.68E+00 4.55E-02 2.07E-02

9.75 247.65 4350.7628 13.725 2.27E-01 1.07E+01 4.85E+00 4.51E-02 2.04E-02

10.00 254.00 4060.7119 12.81 2.35E-01 1.11E+01 5.01E+00 4.46E-02 2.02E-02

10.25 260.35 3770.6611 11.895 2.42E-01 1.14E+01 5.16E+00 4.42E-02 2.01E-02

10.50 266.70 3480.6102 10.98 2.48E-01 1.17E+01 5.30E+00 4.38E-02 1.99E-02

10.75 273.05 3190.5594 10.065 2.54E-01 1.20E+01 5.43E+00 4.35E-02 1.97E-02

11.00 279.40 2900.5085 9.1499 2.60E-01 1.22E+01 5.55E+00 4.32E-02 1.96E-02

11.25 285.75 2610.4577 8.2349 2.65E-01 1.25E+01 5.65E+00 4.29E-02 1.94E-02

11.50 292.10 2320.4068 7.3199 2.69E-01 1.27E+01 5.75E+00 4.26E-02 1.93E-02

11.75 298.45 2030.356 6.4049 2.73E-01 1.29E+01 5.83E+00 4.24E-02 1.92E-02

12.00 304.80 1740.3051 5.4899 2.76E-01 1.30E+01 5.91E+00 4.22E-02 1.91E-02

Results for RBHT Test 1616

Valid Time Period 4033 to 4170 seconds
A-313

Figure A-260 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616D for Time Period 4033 to 4170 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-314

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-E 

Test Conditions

Date: 6/18/2003

Steady-state time window: 4270 – 4412 seconds

Inlet flow rate: 1.781 cm/sec (0.701 in./sec) 

Inlet mass flow rate: 0.082 kg/sec (0.181 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-315

Figure A-261 Inlet Flow Plot for Experiment 1616E 

Figure A-262 Inlet Temperature Plot for Experiment 1616E 
A-316

Figure A-263 System Pressure Plot for Experiment 1616E 

Figure A-264 Bundle Power Plot for Experiment 1616E 
A-317

Table A-105: Data Results for RBHT Test 1616 for Time Period 4270 to 4412 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.644 20.327 973.247 0.370 17.716 0.076 3.639 0.000 0.000 19.88 951.860 4339.88 207794.5697 0.652 0.649 0.655

* 120-133 3048-3378 383 0.668 22.414 1073.208 0.411 19.679 0.136 6.512 -1.493 -71.465 23.36 1118.483 4363.24 208913.0526 0.654 0.651 0.657

* 108-120 2743-3048 382 0.565 27.120 1298.492 0.345 16.519 0.169 8.092 5.286 253.074 21.32 1020.807 4384.56 209933.8596 0.658 0.655 0.661

100-108 2540-2743 381 0.652 14.469 692.761 0.208 9.959 0.124 5.937 0.000 0.000 14.13 676.548 4398.69 210610.4077 0.66 0.657 0.663

97-100 2464-2540 380 0.503 7.738 370.500 0.073 3.495 0.045 2.155 0.000 0.000 7.617 364.704 4406.307 210975.1116 0.511 0.508 0.514

93-97 2362-2464 379 0.545 9.447 452.309 0.093 4.453 0.058 2.777 0.000 0.000 9.294 444.999 4415.601 211420.1107 0.553 0.550 0.556

* 85-93 2159-2362 378 0.411 24.466 1171.428 0.173 8.283 0.112 5.363 7.651 366.321 16.53 791.461 4432.131 212211.5713 0.602 0.599 0.605

81-85 2057-2159 377 0.645 7.369 352.846 0.080 3.830 0.054 2.586 0.000 0.000 7.235 346.414 4439.366 212557.985 0.652 0.649 0.65578-81 1981-2057 376 0.640 5.609 268.551 0.057 2.729 0.039 1.867 0.000 0.000 5.511 263.868 4444.877 212821.8531 0.646 0.643 0.64975-78 1905-1981 375 0.502 7.759 371.495 0.054 2.586 0.038 1.819 0.000 0.000 7.664 366.954 4452.541 213188.8074 0.508 0.505 0.51172-75 1829-1905 374 0.393 9.462 453.055 0.052 2.490 0.037 1.772 0.000 0.000 9.37 448.638 4461.911 213637.4454 0.398 0.396 0.400

* 67-72 1702-1829 373 0.390 15.850 758.904 0.081 3.878 0.060 2.873 2.019 96.672 13.69 655.481 4475.601 214292.9261 0.473 0.471 0.475

63-67 1600-1702 372 0.542 9.525 456.039 0.060 2.873 0.047 2.250 0.000 0.000 9.413 450.697 4485.014 214743.623 0.547 0.544 0.55060-63 1524-1600 371 0.380 9.665 462.752 0.042 2.011 0.034 1.628 0.000 0.000 9.585 458.932 4494.599 215202.5552 0.385 0.383 0.38757-60 1448-1524 370 0.364 9.904 474.191 0.039 1.867 0.033 1.580 0.000 0.000 9.826 470.471 4504.425 215673.0266 0.369 0.367 0.37153-57 1346-1448 369 0.349 13.518 647.257 0.049 2.346 0.043 2.059 0.000 0.000 13.42 642.553 4517.845 216315.5797 0.354 0.352 0.356

* 46-53 1168-1346 368 0.274 26.403 1264.177 0.075 3.591 0.071 3.399 4.207 201.427 22.05 1055.760 4539.895 217371.3394 0.393 0.391 0.395

43-46 1092-1168 367 0.429 8.896 425.951 0.028 1.341 0.029 1.389 0.000 0.000 8.836 423.070 4548.731 217794.4093 0.433 0.431 0.43537-43 940-1092 366 0.297 21.916 1049.337 0.048 2.298 0.055 2.633 0.000 0.000 21.8 1043.790 4570.531 218838.1989 0.3 0.299 0.302

* 25-37 635-940 365 0.158 52.505 2513.932 0.063 3.016 0.100 4.788 1.242 59.447 51.1 2446.681 4621.631 221284.88 0.18 0.179 0.181

13-25 330-635 364 0.059 58.669 2809.089 0.024 1.149 0.037 1.772 0.000 0.000 58.59 2805.304 4680.221 224090.1843 0.06 0.057 0.063

* 0-13 0-330 363 0.043 64.584 3092.311 0.002 0.096 0.000 0.000 -0.898 -42.984 65.48 3135.199 4745.701 227225.3835 0.03 0.029 0.032

Results for RBHT Test 1616

Valid Time Period 4270 to 4412 seconds

Collapsed Liquid Level = 86.395 inches = 2194.43 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-105 Data Results for RBHT Test 1616

E for Time Period 4270 to 4412 seconds
A-318

Table A-106 Energy Balance Results for RBHT Test 1616E for Time Period 4270 to 4412 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.5431 5.4907 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

0.25 6.35 1837.2399 5.7957 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

0.50 12.70 1933.9367 6.1007 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

0.75 19.05 2030.6336 6.4058 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

1.00 25.40 2127.3304 6.7108 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

1.25 31.75 2224.0272 7.0159 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

1.50 38.10 2320.7241 7.3209 0.00E+00 0.00E+00 0.00E+00 5.86E-02 2.66E-02

1.75 44.45 2417.4209 7.6259 1.31E-03 6.23E-02 2.83E-02 5.85E-02 2.66E-02

2.00 50.80 2514.1177 7.931 5.73E-03 2.72E-01 1.23E-01 5.83E-02 2.64E-02

2.25 57.15 2610.8146 8.236 1.03E-02 4.90E-01 2.22E-01 5.80E-02 2.63E-02

2.50 63.50 2707.5114 8.541 1.51E-02 7.15E-01 3.24E-01 5.77E-02 2.62E-02

2.75 69.85 2804.2083 8.8461 2.00E-02 9.50E-01 4.31E-01 5.74E-02 2.61E-02

3.00 76.20 2900.9051 9.1511 2.52E-02 1.19E+00 5.41E-01 5.71E-02 2.59E-02

3.25 82.55 2997.6019 9.4561 3.04E-02 1.44E+00 6.54E-01 5.68E-02 2.58E-02

3.50 88.90 3094.2988 9.7612 3.59E-02 1.70E+00 7.72E-01 5.65E-02 2.56E-02

3.75 95.25 3190.9956 10.066 4.15E-02 1.97E+00 8.93E-01 5.62E-02 2.55E-02

4.00 101.60 3287.6924 10.371 4.73E-02 2.24E+00 1.02E+00 5.58E-02 2.53E-02

4.25 107.95 3384.3893 10.676 5.33E-02 2.53E+00 1.15E+00 5.55E-02 2.52E-02

4.50 114.30 3481.0861 10.981 5.95E-02 2.82E+00 1.28E+00 5.51E-02 2.50E-02

4.75 120.65 3577.7829 11.286 6.58E-02 3.12E+00 1.41E+00 5.48E-02 2.48E-02

5.00 127.00 3674.4798 11.591 7.23E-02 3.43E+00 1.55E+00 5.44E-02 2.47E-02

5.25 133.35 3771.1766 11.896 7.90E-02 3.74E+00 1.70E+00 5.40E-02 2.45E-02

5.50 139.70 3867.8735 12.201 8.58E-02 4.07E+00 1.85E+00 5.36E-02 2.43E-02

5.75 146.05 3964.5703 12.507 9.28E-02 4.40E+00 2.00E+00 5.32E-02 2.41E-02

6.00 152.40 4061.2671 12.812 1.00E-01 4.74E+00 2.15E+00 5.28E-02 2.39E-02

6.25 158.75 4157.964 13.117 1.07E-01 5.09E+00 2.31E+00 5.23E-02 2.37E-02

6.50 165.10 4254.6608 13.422 1.15E-01 5.45E+00 2.47E+00 5.19E-02 2.35E-02

6.75 171.45 4351.3576 13.727 1.23E-01 5.81E+00 2.64E+00 5.14E-02 2.33E-02

7.00 177.80 4448.0545 14.032 1.31E-01 6.19E+00 2.81E+00 5.10E-02 2.31E-02

7.25 184.15 4544.7513 14.337 1.39E-01 6.57E+00 2.98E+00 5.05E-02 2.29E-02

7.50 190.50 4641.4481 14.642 1.47E-01 6.96E+00 3.16E+00 5.00E-02 2.27E-02

7.75 196.85 4738.145 14.947 1.55E-01 7.36E+00 3.34E+00 4.95E-02 2.25E-02

8.00 203.20 4834.8418 15.252 1.64E-01 7.77E+00 3.52E+00 4.90E-02 2.22E-02

8.25 209.55 4931.5387 15.557 1.73E-01 8.18E+00 3.71E+00 4.85E-02 2.20E-02

8.50 215.90 5028.2355 15.862 1.82E-01 8.60E+00 3.90E+00 4.80E-02 2.18E-02

8.75 222.25 5124.9323 16.167 1.91E-01 9.04E+00 4.10E+00 4.74E-02 2.15E-02

9.00 228.60 5221.6292 16.472 2.00E-01 9.48E+00 4.30E+00 4.69E-02 2.13E-02

9.25 234.95 4931.5387 15.557 2.09E-01 9.91E+00 4.49E+00 4.64E-02 2.10E-02

9.50 241.30 4641.4481 14.642 2.18E-01 1.03E+01 4.68E+00 4.59E-02 2.08E-02

9.75 247.65 4351.3576 13.727 2.26E-01 1.07E+01 4.85E+00 4.54E-02 2.06E-02

10.00 254.00 4061.2671 12.812 2.33E-01 1.11E+01 5.01E+00 4.50E-02 2.04E-02

10.25 260.35 3771.1766 11.896 2.40E-01 1.14E+01 5.17E+00 4.45E-02 2.02E-02

10.50 266.70 3481.0861 10.981 2.47E-01 1.17E+01 5.30E+00 4.42E-02 2.00E-02

10.75 273.05 3190.9956 10.066 2.53E-01 1.20E+01 5.43E+00 4.38E-02 1.99E-02

11.00 279.40 2900.9051 9.1511 2.58E-01 1.22E+01 5.55E+00 4.35E-02 1.97E-02

11.25 285.75 2610.8146 8.236 2.63E-01 1.25E+01 5.66E+00 4.32E-02 1.96E-02

11.50 292.10 2320.7241 7.3209 2.68E-01 1.27E+01 5.75E+00 4.29E-02 1.95E-02

11.75 298.45 2030.6336 6.4058 2.71E-01 1.29E+01 5.84E+00 4.27E-02 1.94E-02

12.00 304.80 1740.5431 5.4907 2.75E-01 1.30E+01 5.91E+00 4.25E-02 1.93E-02

Results for RBHT Test 1616

Valid Time Period 4270 to 4412 seconds
A-319

Figure A-265 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616E for Time Period 4270 to 4412 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-320

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-F 

Test Conditions

Date: 6/18/2003

Steady-state time window: 5234 – 5495 seconds

Inlet flow rate: 1.273 cm/sec (0.501 in./sec) 

Inlet mass flow rate: 0.059 kg/sec (0.129 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-321

Figure A-266 Inlet Flow Plot for Experiment 1616F 

Figure A-267 Inlet Temperature Plot for Experiment 1616F 
A-322

Figure A-268 System Pressure Plot for Experiment 1616F 

Figure A-269 Bundle Power Plot for Experiment 1616F 
A-323

Table A-107: Data Results for RBHT Test 1616 for Time Period 5234 to 5495 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.680 18.275 875.027 0.262 12.545 0.054 2.586 0.000 0.000 17.95 859.451 4337.95 207702.1609 0.686 0.683 0.689

* 120-133 3048-3378 383 0.689 21.028 1006.816 0.291 13.933 0.097 4.644 -0.720 -34.484 21.36 1022.722 4359.31 208724.8831 0.684 0.681 0.687

* 108-120 2743-3048 382 0.583 26.019 1245.776 0.244 11.683 0.121 5.794 5.684 272.131 19.97 956.169 4379.28 209681.0519 0.679 0.676 0.682

100-108 2540-2743 381 0.672 13.638 652.976 0.146 6.991 0.088 4.213 0.000 0.000 13.4 641.595 4392.68 210322.6473 0.677 0.674 0.680

97-100 2464-2540 380 0.524 7.421 355.332 0.051 2.442 0.032 1.532 0.000 0.000 7.336 351.250 4400.016 210673.8969 0.529 0.526 0.532

93-97 2362-2464 379 0.556 9.223 441.617 0.066 3.160 0.042 2.011 0.000 0.000 9.113 436.333 4409.129 211110.2297 0.561 0.558 0.564

* 85-93 2159-2362 378 0.418 24.201 1158.746 0.122 5.841 0.080 3.830 7.999 382.990 16 766.084 4425.129 211876.3138 0.615 0.612 0.618

81-85 2057-2159 377 0.664 6.985 334.445 0.056 2.681 0.038 1.819 0.000 0.000 6.889 329.847 4432.018 212206.1609 0.668 0.665 0.67178-81 1981-2057 376 0.658 5.328 255.123 0.040 1.915 0.028 1.341 0.000 0.000 5.257 251.707 4437.275 212457.8674 0.663 0.660 0.66675-78 1905-1981 375 0.519 7.489 358.565 0.038 1.819 0.027 1.293 0.000 0.000 7.419 355.224 4444.694 212813.091 0.524 0.521 0.52772-75 1829-1905 374 0.431 8.865 424.459 0.037 1.772 0.027 1.293 0.000 0.000 8.797 421.203 4453.491 213234.2936 0.435 0.433 0.437

* 67-72 1702-1829 373 0.389 15.876 760.147 0.057 2.729 0.043 2.059 3.016 144.407 12.76 610.952 4466.251 213845.2457 0.509 0.506 0.512

63-67 1600-1702 372 0.578 8.761 419.486 0.043 2.059 0.033 1.580 0.000 0.000 8.681 415.649 4474.932 214260.8942 0.582 0.579 0.58560-63 1524-1600 371 0.395 9.421 451.066 0.030 1.436 0.024 1.149 0.000 0.000 9.362 448.255 4484.294 214709.1492 0.399 0.397 0.40157-60 1448-1524 370 0.385 9.577 458.525 0.028 1.341 0.024 1.149 0.000 0.000 9.523 455.964 4493.817 215165.1129 0.389 0.387 0.39153-57 1346-1448 369 0.367 13.150 629.602 0.035 1.676 0.030 1.436 0.000 0.000 13.08 626.274 4506.897 215791.3866 0.37 0.368 0.372

* 46-53 1168-1346 368 0.283 26.081 1248.760 0.055 2.633 0.051 2.442 5.185 248.255 20.79 995.431 4527.687 216786.8172 0.428 0.426 0.430

43-46 1092-1168 367 0.483 8.060 385.917 0.021 1.005 0.021 1.005 0.000 0.000 8.014 383.712 4535.701 217170.5296 0.486 0.484 0.48837-43 940-1092 366 0.335 20.721 992.145 0.037 1.772 0.039 1.867 0.000 0.000 20.64 988.249 4556.341 218158.7781 0.337 0.335 0.339

* 25-37 635-940 365 0.208 49.378 2364.240 0.054 2.586 0.071 3.399 1.043 49.948 48.21 2308.307 4604.551 220467.0852 0.226 0.225 0.227

13-25 330-635 364 0.114 55.236 2644.726 0.025 1.197 0.054 2.586 0.000 0.000 55.14 2640.117 4659.691 223107.2026 0.115 0.114 0.116

* 0-13 0-330 363 0.045 64.454 3086.094 0.001 0.048 0.000 0.000 0.843 40.383 63.61 3045.663 4723.301 226152.8658 0.057 0.054 0.060

Results for RBHT Test 1616

Valid Time Period 5234 to 5495 seconds

Collapsed Liquid Level = 82.973 inches = 2107.50 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-107 Data Results for RBHT Test 1616

F for Time Period 5234 to 5495 seconds
A-324

Table A-108 Energy Balance Results for RBHT Test 1616F for Time Period 5234 to 5495 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.3626 5.4901 0.00E+00 0.00E+00 0.00E+00 4.19E-02 1.90E-02

0.25 6.35 1837.0495 5.7951 0.00E+00 0.00E+00 0.00E+00 4.19E-02 1.90E-02

0.50 12.70 1933.7363 6.1001 0.00E+00 0.00E+00 0.00E+00 4.19E-02 1.90E-02

0.75 19.05 2030.4231 6.4051 0.00E+00 0.00E+00 0.00E+00 4.19E-02 1.90E-02

1.00 25.40 2127.1099 6.7101 0.00E+00 0.00E+00 0.00E+00 4.19E-02 1.90E-02

1.25 31.75 2223.7967 7.0151 9.90E-04 3.35E-02 1.52E-02 4.19E-02 1.90E-02

1.50 38.10 2320.4835 7.3201 6.69E-03 2.26E-01 1.03E-01 4.16E-02 1.89E-02

1.75 44.45 2417.1703 7.6251 1.26E-02 4.28E-01 1.94E-01 4.14E-02 1.88E-02

2.00 50.80 2513.8572 7.9301 1.88E-02 6.37E-01 2.89E-01 4.11E-02 1.87E-02

2.25 57.15 2610.544 8.2351 2.52E-02 8.54E-01 3.88E-01 4.08E-02 1.85E-02

2.50 63.50 2707.2308 8.5402 3.19E-02 1.08E+00 4.90E-01 4.06E-02 1.84E-02

2.75 69.85 2803.9176 8.8452 3.88E-02 1.31E+00 5.96E-01 4.03E-02 1.83E-02

3.00 76.20 2900.6044 9.1502 4.60E-02 1.56E+00 7.06E-01 4.00E-02 1.81E-02

3.25 82.55 2997.2912 9.4552 5.34E-02 1.81E+00 8.19E-01 3.97E-02 1.80E-02

3.50 88.90 3093.978 9.7602 6.10E-02 2.06E+00 9.37E-01 3.93E-02 1.78E-02

3.75 95.25 3190.6649 10.065 6.89E-02 2.33E+00 1.06E+00 3.90E-02 1.77E-02

4.00 101.60 3287.3517 10.37 7.70E-02 2.61E+00 1.18E+00 3.87E-02 1.75E-02

4.25 107.95 3384.0385 10.675 8.54E-02 2.89E+00 1.31E+00 3.83E-02 1.74E-02

4.50 114.30 3480.7253 10.98 9.40E-02 3.18E+00 1.44E+00 3.80E-02 1.72E-02

4.75 120.65 3577.4121 11.285 1.03E-01 3.48E+00 1.58E+00 3.76E-02 1.71E-02

5.00 127.00 3674.0989 11.59 1.12E-01 3.79E+00 1.72E+00 3.72E-02 1.69E-02

5.25 133.35 3770.7857 11.895 1.21E-01 4.10E+00 1.86E+00 3.68E-02 1.67E-02

5.50 139.70 3867.4726 12.2 1.31E-01 4.43E+00 2.01E+00 3.64E-02 1.65E-02

5.75 146.05 3964.1594 12.505 1.41E-01 4.76E+00 2.16E+00 3.60E-02 1.63E-02

6.00 152.40 4060.8462 12.81 1.51E-01 5.10E+00 2.31E+00 3.56E-02 1.61E-02

6.25 158.75 4157.533 13.115 1.61E-01 5.45E+00 2.47E+00 3.52E-02 1.59E-02

6.50 165.10 4254.2198 13.42 1.72E-01 5.81E+00 2.63E+00 3.47E-02 1.57E-02

6.75 171.45 4350.9066 13.725 1.82E-01 6.17E+00 2.80E+00 3.43E-02 1.55E-02

7.00 177.80 4447.5934 14.03 1.93E-01 6.55E+00 2.97E+00 3.38E-02 1.53E-02

7.25 184.15 4544.2802 14.335 2.05E-01 6.93E+00 3.14E+00 3.33E-02 1.51E-02

7.50 190.50 4640.9671 14.64 2.16E-01 7.32E+00 3.32E+00 3.28E-02 1.49E-02

7.75 196.85 4737.6539 14.945 2.28E-01 7.71E+00 3.50E+00 3.24E-02 1.47E-02

8.00 203.20 4834.3407 15.25 2.40E-01 8.12E+00 3.68E+00 3.19E-02 1.44E-02

8.25 209.55 4931.0275 15.555 2.52E-01 8.54E+00 3.87E+00 3.13E-02 1.42E-02

8.50 215.90 5027.7143 15.86 2.65E-01 8.96E+00 4.06E+00 3.08E-02 1.40E-02

8.75 222.25 5124.4011 16.165 2.77E-01 9.39E+00 4.26E+00 3.03E-02 1.37E-02

9.00 228.60 5221.0879 16.47 2.90E-01 9.83E+00 4.46E+00 2.97E-02 1.35E-02

9.25 234.95 4931.0275 15.555 3.03E-01 1.03E+01 4.65E+00 2.92E-02 1.32E-02

9.50 241.30 4640.9671 14.64 3.15E-01 1.07E+01 4.84E+00 2.87E-02 1.30E-02

9.75 247.65 4350.9066 13.725 3.26E-01 1.10E+01 5.01E+00 2.82E-02 1.28E-02

10.00 254.00 4060.8462 12.81 3.37E-01 1.14E+01 5.17E+00 2.78E-02 1.26E-02

10.25 260.35 3770.7857 11.895 3.47E-01 1.17E+01 5.32E+00 2.74E-02 1.24E-02

10.50 266.70 3480.7253 10.98 3.56E-01 1.20E+01 5.46E+00 2.70E-02 1.22E-02

10.75 273.05 3190.6649 10.065 3.64E-01 1.23E+01 5.59E+00 2.66E-02 1.21E-02

11.00 279.40 2900.6044 9.1502 3.72E-01 1.26E+01 5.71E+00 2.63E-02 1.19E-02

11.25 285.75 2610.544 8.2351 3.79E-01 1.28E+01 5.81E+00 2.60E-02 1.18E-02

11.50 292.10 2320.4835 7.3201 3.85E-01 1.30E+01 5.91E+00 2.58E-02 1.17E-02

11.75 298.45 2030.4231 6.4051 3.90E-01 1.32E+01 5.99E+00 2.55E-02 1.16E-02

12.00 304.80 1740.3626 5.4901 3.95E-01 1.34E+01 6.07E+00 2.53E-02 1.15E-02

Results for RBHT Test 1616

Valid Time Period 5234 to 5495 seconds
A-325

Figure A-270 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616F for Time Period 5234 to 5495 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-326

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-G 

Test Conditions

Date: 6/18/2003

Steady-state time window: 5700 – 5820 seconds

Inlet flow rate: 1.267 cm/sec (0.499 in./sec) 

Inlet mass flow rate: 0.059 kg/sec (0.129 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-327

Figure A-271 Inlet Flow Plot for Experiment 1616G 

Figure A-272 Inlet Temperature Plot for Experiment 1616G 
A-328

Figure A-273 System Pressure Plot for Experiment 1616G 

Figure A-274 Bundle Power Plot for Experiment 1616G 
A-329

Table A-109: Data Results for RBHT Test 1616 for Time Period 5700 to 5820 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.694 17.502 837.977 0.261 12.497 0.054 2.586 0.000 0.000 17.18 822.583 4337.18 207665.2931 0.699 0.696 0.702

* 120-133 3048-3378 383 0.693 20.716 991.897 0.290 13.885 0.096 4.597 -0.270 -12.918 20.6 986.333 4357.78 208651.6263 0.695 0.692 0.698

* 108-120 2743-3048 382 0.585 25.847 1237.571 0.243 11.635 0.120 5.746 5.924 283.652 19.56 936.538 4377.34 209588.1642 0.686 0.683 0.689

100-108 2540-2743 381 0.676 13.461 644.521 0.146 6.991 0.088 4.213 0.000 0.000 13.23 633.456 4390.57 210221.62 0.682 0.679 0.685

97-100 2464-2540 380 0.528 7.359 352.348 0.051 2.442 0.032 1.532 0.000 0.000 7.275 348.329 4397.845 210569.9488 0.533 0.530 0.536

93-97 2362-2464 379 0.554 9.275 444.103 0.065 3.112 0.041 1.963 0.000 0.000 9.166 438.870 4407.011 211008.8193 0.559 0.556 0.562

* 85-93 2159-2362 378 0.418 24.196 1158.498 0.121 5.794 0.080 3.830 7.985 382.311 16.01 766.563 4423.021 211775.3822 0.615 0.612 0.618

81-85 2057-2159 377 0.666 6.943 332.456 0.056 2.681 0.038 1.819 0.000 0.000 6.847 327.836 4429.868 212103.2183 0.67 0.667 0.673

78-81 1981-2057 376 0.658 5.323 254.874 0.040 1.915 0.028 1.341 0.000 0.000 5.252 251.467 4435.12 212354.6854 0.663 0.660 0.666

75-78 1905-1981 375 0.521 7.463 357.322 0.038 1.819 0.027 1.293 0.000 0.000 7.393 353.979 4442.513 212708.6642 0.525 0.522 0.528

72-75 1829-1905 374 0.430 8.875 424.956 0.037 1.772 0.027 1.293 0.000 0.000 8.807 421.681 4451.32 213130.3456 0.435 0.433 0.437

* 67-72 1702-1829 373 0.387 15.923 762.385 0.057 2.729 0.043 2.059 3.043 145.688 12.78 611.910 4464.1 213742.2553 0.508 0.505 0.511

63-67 1600-1702 372 0.578 8.777 420.232 0.043 2.059 0.033 1.580 0.000 0.000 8.698 416.462 4472.798 214158.7177 0.581 0.578 0.584

60-63 1524-1600 371 0.400 9.353 447.833 0.030 1.436 0.024 1.149 0.000 0.000 9.296 445.095 4482.094 214603.8126 0.403 0.401 0.405

57-60 1448-1524 370 0.382 9.623 460.763 0.028 1.341 0.023 1.101 0.000 0.000 9.569 458.166 4491.663 215061.9788 0.386 0.384 0.388

53-57 1346-1448 369 0.366 13.170 630.597 0.035 1.676 0.030 1.436 0.000 0.000 13.1 627.231 4504.763 215689.2102 0.369 0.367 0.371

* 46-53 1168-1346 368 0.287 25.915 1240.803 0.055 2.633 0.050 2.394 4.900 234.600 20.91 1001.176 4525.673 216690.3863 0.425 0.423 0.427

43-46 1092-1168 367 0.478 8.138 389.647 0.021 1.005 0.021 1.005 0.000 0.000 8.094 387.543 4533.767 217077.9291 0.48 0.478 0.482

37-43 940-1092 366 0.336 20.706 991.399 0.037 1.772 0.039 1.867 0.000 0.000 20.62 987.291 4554.387 218065.22 0.338 0.336 0.340

* 25-37 635-940 365 0.206 49.487 2369.462 0.054 2.586 0.071 3.399 1.072 51.339 48.29 2312.138 4602.677 220377.3576 0.225 0.224 0.226

13-25 330-635 364 0.110 55.444 2654.673 0.025 1.197 0.055 2.633 0.000 0.000 55.35 2650.172 4658.027 223027.5299 0.112 0.111 0.113

* 0-13 0-330 363 0.046 64.397 3083.359 0.001 0.048 0.000 0.000 0.676 32.381 63.72 3050.930 4721.747 226078.4598 0.056 0.053 0.059

Results for RBHT Test 1616

Valid Time Period 5700 to 5820 seconds

Collapsed Liquid Level = 83.260 inches = 2114.81 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-109 Data Results for RBHT Test 1616

G for Time Period 5700 to 5820 seconds
A-330

Table A-110 Energy Balance Results for RBHT Test 1616G for Time Period 5700 to 5820 seconds

Elevation Elevation q" w q" w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft 2 KW/m 2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1739.988 5.4889 0.00E+00 0.00E+00 0.00E+00 4.17E-02 1.89E-02

0.25 6.35 1836.654 5.7939 0.00E+00 0.00E+00 0.00E+00 4.17E-02 1.89E-02

0.50 12.70 1933.32 6.0988 0.00E+00 0.00E+00 0.00E+00 4.17E-02 1.89E-02

0.75 19.05 2029.986 6.4037 0.00E+00 0.00E+00 0.00E+00 4.17E-02 1.89E-02

1.00 25.40 2126.652 6.7087 0.00E+00 0.00E+00 0.00E+00 4.17E-02 1.89E-02

1.25 31.75 2223.318 7.0136 1.36E-03 4.60E-02 2.09E-02 4.17E-02 1.89E-02

1.50 38.10 2319.984 7.3186 7.08E-03 2.39E-01 1.08E-01 4.14E-02 1.88E-02

1.75 44.45 2416.65 7.6235 1.30E-02 4.40E-01 2.00E-01 4.12E-02 1.87E-02

2.00 50.80 2513.316 7.9284 1.93E-02 6.49E-01 2.95E-01 4.09E-02 1.86E-02

2.25 57.15 2609.982 8.2334 2.57E-02 8.67E-01 3.93E-01 4.07E-02 1.84E-02

2.50 63.50 2706.648 8.5383 3.24E-02 1.09E+00 4.96E-01 4.04E-02 1.83E-02

2.75 69.85 2803.314 8.8433 3.93E-02 1.33E+00 6.02E-01 4.01E-02 1.82E-02

3.00 76.20 2899.98 9.1482 4.65E-02 1.57E+00 7.12E-01 3.98E-02 1.81E-02

3.25 82.55 2996.646 9.4531 5.39E-02 1.82E+00 8.25E-01 3.95E-02 1.79E-02

3.50 88.90 3093.312 9.7581 6.16E-02 2.08E+00 9.42E-01 3.92E-02 1.78E-02

3.75 95.25 3189.978 10.063 6.95E-02 2.34E+00 1.06E+00 3.88E-02 1.76E-02

4.00 101.60 3286.644 10.368 7.77E-02 2.62E+00 1.19E+00 3.85E-02 1.75E-02

4.25 107.95 3383.31 10.673 8.61E-02 2.90E+00 1.32E+00 3.82E-02 1.73E-02

4.50 114.30 3479.976 10.978 9.47E-02 3.19E+00 1.45E+00 3.78E-02 1.71E-02

4.75 120.65 3576.642 11.283 1.04E-01 3.49E+00 1.59E+00 3.74E-02 1.70E-02

5.00 127.00 3673.3081 11.588 1.13E-01 3.80E+00 1.72E+00 3.70E-02 1.68E-02

5.25 133.35 3769.9741 11.893 1.22E-01 4.12E+00 1.87E+00 3.66E-02 1.66E-02

5.50 139.70 3866.6401 12.198 1.32E-01 4.44E+00 2.02E+00 3.62E-02 1.64E-02

5.75 146.05 3963.3061 12.503 1.42E-01 4.77E+00 2.17E+00 3.58E-02 1.63E-02

6.00 152.40 4059.9721 12.807 1.52E-01 5.11E+00 2.32E+00 3.54E-02 1.61E-02

6.25 158.75 4156.6381 13.112 1.62E-01 5.46E+00 2.48E+00 3.50E-02 1.59E-02

6.50 165.10 4253.3041 13.417 1.73E-01 5.82E+00 2.64E+00 3.45E-02 1.57E-02

6.75 171.45 4349.9701 13.722 1.83E-01 6.19E+00 2.81E+00 3.41E-02 1.55E-02

7.00 177.80 4446.6361 14.027 1.95E-01 6.56E+00 2.98E+00 3.36E-02 1.53E-02

7.25 184.15 4543.3021 14.332 2.06E-01 6.94E+00 3.15E+00 3.32E-02 1.50E-02

7.50 190.50 4639.9681 14.637 2.17E-01 7.33E+00 3.33E+00 3.27E-02 1.48E-02

7.75 196.85 4736.6341 14.942 2.29E-01 7.73E+00 3.51E+00 3.22E-02 1.46E-02

8.00 203.20 4833.3001 15.247 2.41E-01 8.14E+00 3.69E+00 3.17E-02 1.44E-02

8.25 209.55 4929.9661 15.552 2.54E-01 8.55E+00 3.88E+00 3.12E-02 1.41E-02

8.50 215.90 5026.6321 15.857 2.66E-01 8.97E+00 4.07E+00 3.06E-02 1.39E-02

8.75 222.25 5123.2981 16.162 2.79E-01 9.41E+00 4.27E+00 3.01E-02 1.37E-02

9.00 228.60 5219.9641 16.467 2.92E-01 9.84E+00 4.46E+00 2.96E-02 1.34E-02

9.25 234.95 4929.9661 15.552 3.05E-01 1.03E+01 4.66E+00 2.90E-02 1.32E-02

9.50 241.30 4639.9681 14.637 3.17E-01 1.07E+01 4.84E+00 2.85E-02 1.29E-02

9.75 247.65 4349.9701 13.722 3.28E-01 1.11E+01 5.02E+00 2.81E-02 1.27E-02

10.00 254.00 4059.9721 12.807 3.39E-01 1.14E+01 5.18E+00 2.76E-02 1.25E-02

10.25 260.35 3769.9741 11.893 3.48E-01 1.18E+01 5.33E+00 2.72E-02 1.23E-02

10.50 266.70 3479.976 10.978 3.58E-01 1.21E+01 5.47E+00 2.68E-02 1.22E-02

10.75 273.05 3189.978 10.063 3.66E-01 1.23E+01 5.60E+00 2.65E-02 1.20E-02

11.00 279.40 2899.98 9.1482 3.74E-01 1.26E+01 5.72E+00 2.62E-02 1.19E-02

11.25 285.75 2609.982 8.2334 3.81E-01 1.28E+01 5.82E+00 2.59E-02 1.17E-02

11.50 292.10 2319.984 7.3186 3.87E-01 1.30E+01 5.92E+00 2.56E-02 1.16E-02

11.75 298.45 2029.986 6.4037 3.92E-01 1.32E+01 6.00E+00 2.54E-02 1.15E-02

12.00 304.80 1739.988 5.4889 3.97E-01 1.34E+01 6.07E+00 2.52E-02 1.14E-02

Results for RBHT Test 1616

Valid Time Period 5700 to 5820 seconds
A-331

Figure A-275 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616G for Time Period 5700 to 5820 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-332

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-H 

Test Conditions

Date: 6/18/2003

Steady-state time window: 6083 – 6497 seconds

Inlet flow rate: 0.759 cm/sec (0.299 in./sec) 

Inlet mass flow rate: 0.035 kg/sec (0.077 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-333

Figure A-276 Inlet Flow Plot for Experiment 1616H 

Figure A-277 Inlet Temperature Plot for Experiment 1616H 
A-334

Figure A-278 System Pressure Plot for Experiment 1616H 

Figure A-279 Bundle Power Plot for Experiment 1616H 
A-335

Table A-111: Data Results for RBHT Test 1616 for Time Period 6083 to 6497 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.762 13.586 650.489 0.154 7.374 0.032 1.532 0.000 0.000 13.39 641.117 4333.39 207483.8269 0.766 0.762 0.770

* 120-133 3048-3378 383 0.735 17.881 856.129 0.171 8.188 0.058 2.777 0.742 35.510 16.91 809.655 4350.3 208293.482 0.749 0.745 0.753

* 108-120 2743-3048 382 0.618 23.801 1139.599 0.143 6.847 0.072 3.447 5.966 285.655 17.62 843.650 4367.92 209137.1322 0.717 0.713 0.721

100-108 2540-2743 381 0.698 12.557 601.255 0.085 4.070 0.053 2.538 0.000 0.000 12.41 594.194 4380.33 209731.3261 0.701 0.697 0.705

97-100 2464-2540 380 0.550 7.016 335.937 0.030 1.436 0.019 0.910 0.000 0.000 6.965 333.486 4387.295 210064.8121 0.553 0.550 0.556

93-97 2362-2464 379 0.576 8.803 421.475 0.038 1.819 0.025 1.197 0.000 0.000 8.738 418.378 4396.033 210483.1898 0.579 0.576 0.582

* 85-93 2159-2362 378 0.430 23.702 1134.875 0.071 3.399 0.048 2.298 8.243 394.694 15.34 734.483 4411.373 211217.673 0.631 0.628 0.634

81-85 2057-2159 377 0.679 6.663 319.028 0.033 1.580 0.023 1.101 0.000 0.000 6.604 316.201 4417.977 211533.8742 0.682 0.679 0.685

78-81 1981-2057 376 0.677 5.038 241.198 0.023 1.101 0.017 0.814 0.000 0.000 4.993 239.066 4422.97 211772.9403 0.679 0.676 0.682

75-78 1905-1981 375 0.540 7.162 342.899 0.022 1.053 0.016 0.766 0.000 0.000 7.119 340.860 4430.089 212113.7999 0.543 0.540 0.546

72-75 1829-1905 374 0.463 8.361 400.339 0.021 1.005 0.016 0.766 0.000 0.000 8.324 398.555 4438.413 212512.3551 0.466 0.464 0.468

* 67-72 1702-1829 373 0.387 15.918 762.137 0.033 1.580 0.026 1.245 3.809 182.355 12.05 576.957 4450.463 213089.3122 0.536 0.533 0.539

63-67 1600-1702 372 0.604 8.237 394.372 0.025 1.197 0.020 0.958 0.000 0.000 8.188 392.044 4458.651 213481.3558 0.606 0.603 0.609

60-63 1524-1600 371 0.413 9.140 437.638 0.017 0.814 0.014 0.670 0.000 0.000 9.107 436.046 4467.758 213917.4013 0.415 0.413 0.417

57-60 1448-1524 370 0.404 9.280 444.352 0.017 0.814 0.014 0.670 0.000 0.000 9.246 442.701 4477.004 214360.1021 0.406 0.404 0.408

53-57 1346-1448 369 0.388 12.718 608.963 0.021 1.005 0.018 0.862 0.000 0.000 12.68 607.122 4489.684 214967.2238 0.39 0.388 0.392

* 46-53 1168-1346 368 0.288 25.878 1239.063 0.032 1.532 0.030 1.436 5.896 282.319 19.92 953.775 4509.604 215920.9985 0.452 0.450 0.454

43-46 1092-1168 367 0.513 7.593 363.538 0.012 0.575 0.012 0.575 0.000 0.000 7.563 362.118 4517.167 216283.1169 0.514 0.511 0.517

37-43 940-1092 366 0.375 19.465 931.970 0.022 1.053 0.023 1.101 0.000 0.000 19.41 929.356 4536.577 217212.4727 0.377 0.375 0.379

* 25-37 635-940 365 0.240 47.368 2268.009 0.034 1.628 0.042 2.011 3.112 149.021 44.18 2115.350 4580.757 219327.8224 0.291 0.290 0.292

13-25 330-635 364 0.204 49.607 2375.181 0.020 0.958 0.036 1.724 0.000 0.000 49.54 2371.988 4630.297 221699.8103 0.205 0.204 0.206

* 0-13 0-330 363 0.050 64.158 3071.921 0.007 0.335 0.011 0.527 3.560 170.473 60.58 2900.586 4690.877 224600.3963 0.102 0.101 0.103

Results for RBHT Test 1616

Valid Time Period 6083 to 6497 seconds

Collapsed Liquid Level = 77.974 inches = 1980.53 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-111 Data Results for RBHT Test 1616

H for Time Period 6083 to 6497 seconds
A-336

Table A-112 Energy Balance Results for RBHT Test 1616H for Time Period 6083 to 6497 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1737.7489 5.4819 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.25 6.35 1834.2905 5.7864 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.50 12.70 1930.8321 6.0909 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.75 19.05 2027.3737 6.3955 3.32E-04 6.69E-03 3.04E-03 2.50E-02 1.13E-02

1.00 25.40 2123.9153 6.7 9.06E-03 1.83E-01 8.30E-02 2.48E-02 1.12E-02

1.25 31.75 2220.4569 7.0046 1.82E-02 3.67E-01 1.67E-01 2.45E-02 1.11E-02

1.50 38.10 2316.9985 7.3091 2.77E-02 5.60E-01 2.54E-01 2.43E-02 1.10E-02

1.75 44.45 2413.5401 7.6137 3.77E-02 7.61E-01 3.45E-01 2.41E-02 1.09E-02

2.00 50.80 2510.0817 7.9182 4.80E-02 9.70E-01 4.40E-01 2.38E-02 1.08E-02

2.25 57.15 2606.6233 8.2228 5.88E-02 1.19E+00 5.38E-01 2.35E-02 1.07E-02

2.50 63.50 2703.165 8.5273 6.99E-02 1.41E+00 6.41E-01 2.32E-02 1.05E-02

2.75 69.85 2799.7066 8.8319 8.15E-02 1.65E+00 7.47E-01 2.30E-02 1.04E-02

3.00 76.20 2896.2482 9.1364 9.35E-02 1.89E+00 8.56E-01 2.27E-02 1.03E-02

3.25 82.55 2992.7898 9.441 1.06E-01 2.14E+00 9.70E-01 2.23E-02 1.01E-02

3.50 88.90 3089.3314 9.7455 1.19E-01 2.40E+00 1.09E+00 2.20E-02 9.99E-03

3.75 95.25 3185.873 10.05 1.32E-01 2.66E+00 1.21E+00 2.17E-02 9.84E-03

4.00 101.60 3282.4146 10.355 1.45E-01 2.94E+00 1.33E+00 2.14E-02 9.69E-03

4.25 107.95 3378.9562 10.659 1.59E-01 3.22E+00 1.46E+00 2.10E-02 9.53E-03

4.50 114.30 3475.4978 10.964 1.74E-01 3.51E+00 1.59E+00 2.06E-02 9.37E-03

4.75 120.65 3572.0394 11.268 1.89E-01 3.81E+00 1.73E+00 2.03E-02 9.20E-03

5.00 127.00 3668.581 11.573 2.04E-01 4.12E+00 1.87E+00 1.99E-02 9.03E-03

5.25 133.35 3765.1226 11.877 2.20E-01 4.43E+00 2.01E+00 1.95E-02 8.85E-03

5.50 139.70 3861.6642 12.182 2.36E-01 4.76E+00 2.16E+00 1.91E-02 8.67E-03

5.75 146.05 3958.2058 12.486 2.52E-01 5.09E+00 2.31E+00 1.87E-02 8.48E-03

6.00 152.40 4054.7474 12.791 2.69E-01 5.43E+00 2.46E+00 1.83E-02 8.29E-03

6.25 158.75 4151.289 13.096 2.86E-01 5.78E+00 2.62E+00 1.78E-02 8.09E-03

6.50 165.10 4247.8306 13.4 3.04E-01 6.13E+00 2.78E+00 1.74E-02 7.89E-03

6.75 171.45 4344.3722 13.705 3.22E-01 6.50E+00 2.95E+00 1.70E-02 7.69E-03

7.00 177.80 4440.9138 14.009 3.40E-01 6.87E+00 3.12E+00 1.65E-02 7.48E-03

7.25 184.15 4537.4555 14.314 3.59E-01 7.25E+00 3.29E+00 1.60E-02 7.27E-03

7.50 190.50 4633.9971 14.618 3.78E-01 7.64E+00 3.47E+00 1.55E-02 7.05E-03

7.75 196.85 4730.5387 14.923 3.98E-01 8.04E+00 3.65E+00 1.50E-02 6.82E-03

8.00 203.20 4827.0803 15.227 4.18E-01 8.45E+00 3.83E+00 1.45E-02 6.60E-03

8.25 209.55 4923.6219 15.532 4.39E-01 8.86E+00 4.02E+00 1.40E-02 6.36E-03

8.50 215.90 5020.1635 15.836 4.60E-01 9.28E+00 4.21E+00 1.35E-02 6.13E-03

8.75 222.25 5116.7051 16.141 4.81E-01 9.71E+00 4.41E+00 1.30E-02 5.88E-03

9.00 228.60 5213.2467 16.446 5.03E-01 1.02E+01 4.60E+00 1.24E-02 5.64E-03

9.25 234.95 4923.6219 15.532 5.24E-01 1.06E+01 4.80E+00 1.19E-02 5.40E-03

9.50 241.30 4633.9971 14.618 5.44E-01 1.10E+01 4.98E+00 1.14E-02 5.17E-03

9.75 247.65 4344.3722 13.705 5.63E-01 1.14E+01 5.16E+00 1.09E-02 4.96E-03

10.00 254.00 4054.7474 12.791 5.81E-01 1.17E+01 5.32E+00 1.05E-02 4.76E-03

10.25 260.35 3765.1226 11.877 5.97E-01 1.21E+01 5.47E+00 1.01E-02 4.57E-03

10.50 266.70 3475.4978 10.964 6.12E-01 1.24E+01 5.61E+00 9.69E-03 4.40E-03

10.75 273.05 3185.873 10.05 6.26E-01 1.26E+01 5.74E+00 9.34E-03 4.24E-03

11.00 279.40 2896.2482 9.1364 6.39E-01 1.29E+01 5.85E+00 9.02E-03 4.09E-03

11.25 285.75 2606.6233 8.2228 6.51E-01 1.31E+01 5.96E+00 8.73E-03 3.96E-03

11.50 292.10 2316.9985 7.3091 6.61E-01 1.33E+01 6.05E+00 8.48E-03 3.84E-03

11.75 298.45 2027.3737 6.3955 6.70E-01 1.35E+01 6.14E+00 8.25E-03 3.74E-03

12.00 304.80 1737.7489 5.4819 6.78E-01 1.37E+01 6.21E+00 8.05E-03 3.65E-03

Results for RBHT Test 1616

Valid Time Period 6083 to 6497 seconds
A-337

Figure A-280 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616H for Time Period 6083 to 6497 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-338

RBHT Two-Phase Mixture Level and Uncovery Test INT-1616-I 

Test Conditions

Date: 6/18/2003

Steady-state time window: 7500 – 7710 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.023 kg/sec (0.051 lbm/sec) 

Inlet flow temperature: 382.2 K (228.2 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.93 kW 
A-339

Figure A-281 Inlet Flow Plot for Experiment 1616I 

Figure A-282 Inlet Temperature Plot for Experiment 1616I 
A-340

Figure A-283 System Pressure Plot for Experiment 1616I 

Figure A-284 Bundle Power Plot for Experiment 1616I 
A-341

Table A-113: Data Results for RBHT Test 1616 for Time Period 7500 to 7710 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.796 11.628 556.745 0.082 3.926 0.010 0.479 0.000 0.000 11.53 552.059 4331.53 207394.7696 0.798 0.794 0.802

* 120-133 3048-3378 383 0.756 16.489 789.489 0.105 5.027 0.039 1.867 1.265 60.560 15.08 722.034 4346.61 208116.8039 0.777 0.773 0.781

* 108-120 2743-3048 382 0.636 22.664 1085.143 0.092 4.405 0.048 2.298 5.934 284.107 16.59 794.333 4363.2 208911.1373 0.734 0.730 0.738

100-108 2540-2743 381 0.710 12.043 576.638 0.056 2.681 0.035 1.676 0.000 0.000 11.95 572.169 4375.15 209483.3064 0.712 0.708 0.716

97-100 2464-2540 380 0.564 6.798 325.493 0.020 0.958 0.013 0.622 0.000 0.000 6.764 323.862 4381.914 209807.1685 0.566 0.563 0.569

93-97 2362-2464 379 0.586 8.595 411.529 0.025 1.197 0.017 0.814 0.000 0.000 8.551 409.424 4390.465 210216.5925 0.588 0.585 0.591

* 85-93 2159-2362 378 0.440 23.271 1114.236 0.046 2.202 0.032 1.532 7.833 375.061 15.36 735.441 4405.825 210952.0333 0.63 0.627 0.633

81-85 2057-2159 377 0.670 6.850 327.980 0.021 1.005 0.015 0.718 0.000 0.000 6.81 326.065 4412.635 211278.0978 0.672 0.669 0.675

78-81 1981-2057 376 0.654 5.396 258.356 0.015 0.718 0.011 0.527 0.000 0.000 5.367 256.973 4418.002 211535.0712 0.655 0.652 0.658

75-78 1905-1981 375 0.527 7.369 352.846 0.015 0.718 0.011 0.527 0.000 0.000 7.342 351.537 4425.344 211886.608 0.529 0.526 0.532

72-75 1829-1905 374 0.452 8.538 408.794 0.014 0.670 0.011 0.527 0.000 0.000 8.51 407.461 4433.854 212294.069 0.454 0.452 0.456

* 67-72 1702-1829 373 0.378 16.151 773.326 0.022 1.053 0.017 0.814 3.632 173.913 12.48 597.546 4446.334 212891.6146 0.519 0.516 0.522

63-67 1600-1702 372 0.583 8.662 414.762 0.016 0.766 0.013 0.622 0.000 0.000 8.628 413.111 4454.962 213304.7255 0.585 0.582 0.588

60-63 1524-1600 371 0.397 9.390 449.574 0.011 0.527 0.010 0.479 0.000 0.000 9.366 448.446 4464.328 213753.172 0.399 0.397 0.401

57-60 1448-1524 370 0.388 9.540 456.785 0.011 0.527 0.009 0.431 0.000 0.000 9.514 455.533 4473.842 214208.7047 0.389 0.387 0.391

53-57 1346-1448 369 0.374 12.999 622.391 0.013 0.622 0.012 0.575 0.000 0.000 12.97 621.007 4486.812 214829.7117 0.375 0.373 0.377

* 46-53 1168-1346 368 0.273 26.418 1264.923 0.021 1.005 0.020 0.958 5.707 273.275 20.67 989.685 4507.482 215819.3966 0.431 0.429 0.433

43-46 1092-1168 367 0.486 8.008 383.431 0.008 0.383 0.008 0.383 0.000 0.000 7.988 382.467 4515.47 216201.8641 0.487 0.485 0.489

37-43 940-1092 366 0.353 20.176 966.036 0.015 0.718 0.016 0.766 0.000 0.000 20.14 964.308 4535.61 217166.1725 0.354 0.352 0.356

* 25-37 635-940 365 0.250 46.719 2236.927 0.023 1.101 0.028 1.341 2.608 124.881 44.06 2109.604 4579.67 219275.7766 0.293 0.292 0.294

13-25 330-635 364 0.231 47.903 2293.621 0.014 0.670 0.024 1.149 0.000 0.000 47.85 2291.070 4627.52 221566.8469 0.232 0.231 0.233

* 0-13 0-330 363 0.058 63.623 3046.309 0.006 0.287 0.012 0.575 3.945 188.911 59.66 2856.536 4687.18 224423.383 0.116 0.115 0.117

Results for RBHT Test 1616

Valid Time Period 7500 to 7710 seconds

Collapsed Liquid Level = 76.477 inches = 1942.52 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-113 Data Results for RBHT Test 1616I for Time Period 7500 to 7710 seconds
A-342

Table A-114 Energy Balance Results for RBHT Test 1616I for Time Period 7500 to 7710 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.8985 5.4918 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.57E-03

0.25 6.35 1837.6151 5.7969 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.57E-03

0.50 12.70 1934.3317 6.102 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.57E-03

0.75 19.05 2031.0483 6.4071 1.20E-02 1.62E-01 7.35E-02 1.65E-02 7.48E-03

1.00 25.40 2127.7648 6.7122 2.51E-02 3.39E-01 1.54E-01 1.63E-02 7.38E-03

1.25 31.75 2224.4814 7.0173 3.88E-02 5.24E-01 2.38E-01 1.60E-02 7.27E-03

1.50 38.10 2321.198 7.3224 5.31E-02 7.17E-01 3.25E-01 1.58E-02 7.17E-03

1.75 44.45 2417.9146 7.6275 6.80E-02 9.18E-01 4.16E-01 1.55E-02 7.05E-03

2.00 50.80 2514.6312 7.9326 8.36E-02 1.13E+00 5.12E-01 1.53E-02 6.94E-03

2.25 57.15 2611.3478 8.2377 9.97E-02 1.35E+00 6.10E-01 1.50E-02 6.81E-03

2.50 63.50 2708.0644 8.5428 1.17E-01 1.57E+00 7.13E-01 1.47E-02 6.69E-03

2.75 69.85 2804.7809 8.8479 1.34E-01 1.81E+00 8.19E-01 1.45E-02 6.55E-03

3.00 76.20 2901.4975 9.153 1.52E-01 2.05E+00 9.29E-01 1.42E-02 6.42E-03

3.25 82.55 2998.2141 9.4581 1.70E-01 2.30E+00 1.04E+00 1.38E-02 6.28E-03

3.50 88.90 3094.9307 9.7632 1.90E-01 2.56E+00 1.16E+00 1.35E-02 6.13E-03

3.75 95.25 3191.6473 10.068 2.09E-01 2.82E+00 1.28E+00 1.32E-02 5.98E-03

4.00 101.60 3288.3639 10.373 2.30E-01 3.10E+00 1.41E+00 1.28E-02 5.83E-03

4.25 107.95 3385.0804 10.678 2.51E-01 3.39E+00 1.54E+00 1.25E-02 5.67E-03

4.50 114.30 3481.797 10.984 2.72E-01 3.68E+00 1.67E+00 1.21E-02 5.51E-03

4.75 120.65 3578.5136 11.289 2.95E-01 3.98E+00 1.80E+00 1.18E-02 5.34E-03

5.00 127.00 3675.2302 11.594 3.18E-01 4.29E+00 1.94E+00 1.14E-02 5.16E-03

5.25 133.35 3771.9468 11.899 3.41E-01 4.60E+00 2.09E+00 1.10E-02 4.99E-03

5.50 139.70 3868.6634 12.204 3.65E-01 4.93E+00 2.23E+00 1.06E-02 4.81E-03

5.75 146.05 3965.3799 12.509 3.90E-01 5.26E+00 2.39E+00 1.02E-02 4.62E-03

6.00 152.40 4062.0965 12.814 4.15E-01 5.60E+00 2.54E+00 9.76E-03 4.43E-03

6.25 158.75 4158.8131 13.119 4.41E-01 5.95E+00 2.70E+00 9.33E-03 4.23E-03

6.50 165.10 4255.5297 13.424 4.67E-01 6.31E+00 2.86E+00 8.89E-03 4.03E-03

6.75 171.45 4352.2463 13.729 4.94E-01 6.67E+00 3.03E+00 8.44E-03 3.83E-03

7.00 177.80 4448.9629 14.035 5.22E-01 7.05E+00 3.20E+00 7.97E-03 3.62E-03

7.25 184.15 4545.6794 14.34 5.50E-01 7.43E+00 3.37E+00 7.50E-03 3.40E-03

7.50 190.50 4642.396 14.645 5.79E-01 7.82E+00 3.55E+00 7.02E-03 3.18E-03

7.75 196.85 4739.1126 14.95 6.09E-01 8.22E+00 3.73E+00 6.52E-03 2.96E-03

8.00 203.20 4835.8292 15.255 6.39E-01 8.63E+00 3.91E+00 6.02E-03 2.73E-03

8.25 209.55 4932.5458 15.56 6.70E-01 9.04E+00 4.10E+00 5.51E-03 2.50E-03

8.50 215.90 5029.2624 15.865 7.01E-01 9.46E+00 4.29E+00 4.99E-03 2.26E-03

8.75 222.25 5125.979 16.17 7.33E-01 9.90E+00 4.49E+00 4.45E-03 2.02E-03

9.00 228.60 5222.6955 16.475 7.66E-01 1.03E+01 4.69E+00 3.91E-03 1.77E-03

9.25 234.95 4932.5458 15.56 7.98E-01 1.08E+01 4.88E+00 3.38E-03 1.53E-03

9.50 241.30 4642.396 14.645 8.28E-01 1.12E+01 5.07E+00 2.87E-03 1.30E-03

9.75 247.65 4352.2463 13.729 8.56E-01 1.16E+01 5.24E+00 2.40E-03 1.09E-03

10.00 254.00 4062.0965 12.814 8.83E-01 1.19E+01 5.40E+00 1.96E-03 8.88E-04

10.25 260.35 3771.9468 11.899 9.07E-01 1.22E+01 5.56E+00 1.54E-03 7.01E-04

10.50 266.70 3481.797 10.984 9.30E-01 1.26E+01 5.69E+00 1.16E-03 5.28E-04

10.75 273.05 3191.6473 10.068 9.51E-01 1.28E+01 5.82E+00 8.14E-04 3.69E-04

11.00 279.40 2901.4975 9.153 9.70E-01 1.31E+01 5.94E+00 4.94E-04 2.24E-04

11.25 285.75 2611.3478 8.2377 9.88E-01 1.33E+01 6.05E+00 2.04E-04 9.23E-05

11.50 292.10 2321.198 7.3224 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

11.75 298.45 2031.0483 6.4071 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

12.00 304.80 1740.8985 5.4918 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

Results for RBHT Test 1616

Valid Time Period 7500 to 7710 seconds
A-343

Figure A-285 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1616I for Time Period 7500 to 7710 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-344

RBHT Two-Phase Mixture Level and Uncovery Test INT-1617-A 

Test Conditions

Date: 6/18/2003

Steady-state time window: 810 – 990 seconds

Inlet flow rate: 0.503 cm/sec (0.198 in./sec) 

Inlet mass flow rate: 0.023 kg/sec (0.051 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.89 kW 
A-345

Figure A-286 Inlet Flow Plot for Experiment 1617A 

Figure A-287 Inlet Temperature Plot for Experiment 1617A 
A-346

Figure A-288 System Pressure Plot for Experiment 1617A 

Figure A-289 Bundle Power Plot for Experiment 1617A 
A-347

Table A-115: Data Results for RBHT Test 1617 for Time Period 810 to 990 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.895 6.014 287.946 0.079 3.783 0.008 0.383 0.000 0.000 5.927 283.786 4325.927 207126.4965 0.896 0.892 0.900

* 120-133 3048-3378 383 0.834 11.223 537.350 0.103 4.932 0.038 1.819 1.418 67.884 9.664 462.715 4335.591 207589.2113 0.857 0.853 0.861

* 108-120 2743-3048 382 0.708 18.203 871.546 0.091 4.357 0.048 2.298 4.234 202.707 13.83 662.184 4349.421 208251.3953 0.778 0.774 0.782

100-108 2540-2743 381 0.737 10.948 524.171 0.055 2.633 0.035 1.676 0.000 0.000 10.85 519.501 4360.271 208770.8961 0.739 0.735 0.743

97-100 2464-2540 380 0.619 5.931 283.967 0.019 0.910 0.013 0.622 0.000 0.000 5.895 282.254 4366.166 209053.1502 0.622 0.619 0.625

93-97 2362-2464 379 0.617 7.961 381.193 0.025 1.197 0.016 0.766 0.000 0.000 7.915 378.972 4374.081 209432.1224 0.619 0.616 0.622

* 85-93 2159-2362 378 0.440 23.277 1114.485 0.046 2.202 0.032 1.532 8.849 423.669 14.35 687.082 4388.431 210119.2041 0.654 0.651 0.657

81-85 2057-2159 377 0.688 6.476 310.076 0.021 1.005 0.015 0.718 0.000 0.000 6.439 308.301 4394.87 210427.5051 0.69 0.687 0.693

78-81 1981-2057 376 0.684 4.923 235.728 0.015 0.718 0.011 0.527 0.000 0.000 4.893 234.278 4399.763 210661.7832 0.686 0.683 0.689

75-78 1905-1981 375 0.538 7.198 344.640 0.014 0.670 0.011 0.527 0.000 0.000 7.17 343.301 4406.933 211005.0846 0.54 0.537 0.543

72-75 1829-1905 374 0.483 8.060 385.917 0.014 0.670 0.011 0.527 0.000 0.000 8.032 384.574 4414.965 211389.6588 0.484 0.482 0.486

* 67-72 1702-1829 373 0.399 15.606 747.217 0.021 1.005 0.017 0.814 3.878 185.678 11.69 559.720 4426.655 211949.3791 0.55 0.547 0.553

63-67 1600-1702 372 0.614 8.029 384.425 0.016 0.766 0.013 0.622 0.000 0.000 7.997 382.898 4434.652 212332.2775 0.615 0.612 0.618

60-63 1524-1600 371 0.421 9.026 432.168 0.011 0.527 0.010 0.479 0.000 0.000 9.002 431.018 4443.654 212763.2955 0.422 0.420 0.424

57-60 1448-1524 370 0.408 9.223 441.617 0.011 0.527 0.009 0.431 0.000 0.000 9.198 440.403 4452.852 213203.6981 0.409 0.407 0.411

53-57 1346-1448 369 0.397 12.537 600.260 0.013 0.622 0.012 0.575 0.000 0.000 12.51 598.982 4465.362 213802.6802 0.398 0.396 0.400

* 46-53 1168-1346 368 0.281 26.133 1251.247 0.021 1.005 0.020 0.958 6.472 309.873 19.62 939.411 4484.982 214742.0908 0.46 0.458 0.462

43-46 1092-1168 367 0.521 7.458 357.073 0.008 0.383 0.008 0.383 0.000 0.000 7.438 356.133 4492.42 215098.2242 0.523 0.520 0.526

37-43 940-1092 366 0.394 18.878 903.872 0.014 0.670 0.016 0.766 0.000 0.000 18.84 902.064 4511.26 216000.2882 0.395 0.393 0.397

* 25-37 635-940 365 0.248 46.865 2243.890 0.022 1.053 0.028 1.341 4.065 194.615 42.75 2046.881 4554.01 218047.1692 0.314 0.312 0.316

13-25 330-635 364 0.232 47.883 2292.627 0.014 0.670 0.024 1.149 0.000 0.000 47.83 2290.113 4601.84 220337.2819 0.232 0.231 0.233

* 0-13 0-330 363 0.057 63.681 3049.044 0.006 0.287 0.012 0.575 4.013 192.125 59.65 2856.057 4661.49 223193.3392 0.116 0.115 0.117

Results for RBHT Test 1617

Valid Time Period 810 to 990 seconds

Collapsed Liquid Level = 72.946 inches = 1852.83 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-115 Data Results for RBHT Test 1617

A for Time Period 810 to 990 seconds
A-348

Table A-116 Energy Balance Results for RBHT Test 1617A for Time Period 810 to 990 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1738.2508 5.4834 0.00E+00 0.00E+00 0.00E+00 1.66E-02 7.51E-03

0.25 6.35 1834.8202 5.7881 0.00E+00 0.00E+00 0.00E+00 1.66E-02 7.51E-03

0.50 12.70 1931.3897 6.0927 0.00E+00 0.00E+00 0.00E+00 1.66E-02 7.51E-03

0.75 19.05 2027.9592 6.3973 1.08E-02 1.45E-01 6.56E-02 1.64E-02 7.43E-03

1.00 25.40 2124.5287 6.702 2.40E-02 3.21E-01 1.46E-01 1.62E-02 7.33E-03

1.25 31.75 2221.0982 7.0066 3.78E-02 5.06E-01 2.29E-01 1.59E-02 7.22E-03

1.50 38.10 2317.6677 7.3112 5.22E-02 6.98E-01 3.17E-01 1.57E-02 7.12E-03

1.75 44.45 2414.2372 7.6159 6.72E-02 8.99E-01 4.08E-01 1.54E-02 7.00E-03

2.00 50.80 2510.8066 7.9205 8.29E-02 1.11E+00 5.03E-01 1.52E-02 6.89E-03

2.25 57.15 2607.3761 8.2252 9.91E-02 1.33E+00 6.01E-01 1.49E-02 6.76E-03

2.50 63.50 2703.9456 8.5298 1.16E-01 1.55E+00 7.04E-01 1.46E-02 6.64E-03

2.75 69.85 2800.5151 8.8344 1.33E-01 1.78E+00 8.09E-01 1.43E-02 6.51E-03

3.00 76.20 2897.0846 9.1391 1.52E-01 2.03E+00 9.19E-01 1.40E-02 6.37E-03

3.25 82.55 2993.6541 9.4437 1.70E-01 2.28E+00 1.03E+00 1.37E-02 6.23E-03

3.50 88.90 3090.2236 9.7483 1.90E-01 2.53E+00 1.15E+00 1.34E-02 6.09E-03

3.75 95.25 3186.793 10.053 2.09E-01 2.80E+00 1.27E+00 1.31E-02 5.94E-03

4.00 101.60 3283.3625 10.358 2.30E-01 3.08E+00 1.40E+00 1.27E-02 5.78E-03

4.25 107.95 3379.932 10.662 2.51E-01 3.36E+00 1.52E+00 1.24E-02 5.62E-03

4.50 114.30 3476.5015 10.967 2.73E-01 3.65E+00 1.66E+00 1.20E-02 5.46E-03

4.75 120.65 3573.071 11.272 2.95E-01 3.95E+00 1.79E+00 1.17E-02 5.29E-03

5.00 127.00 3669.6405 11.576 3.18E-01 4.26E+00 1.93E+00 1.13E-02 5.12E-03

5.25 133.35 3766.21 11.881 3.42E-01 4.57E+00 2.07E+00 1.09E-02 4.94E-03

5.50 139.70 3862.7794 12.185 3.66E-01 4.90E+00 2.22E+00 1.05E-02 4.76E-03

5.75 146.05 3959.3489 12.49 3.91E-01 5.23E+00 2.37E+00 1.01E-02 4.57E-03

6.00 152.40 4055.9184 12.795 4.16E-01 5.57E+00 2.53E+00 9.66E-03 4.38E-03

6.25 158.75 4152.4879 13.099 4.42E-01 5.92E+00 2.68E+00 9.23E-03 4.19E-03

6.50 165.10 4249.0574 13.404 4.69E-01 6.27E+00 2.85E+00 8.79E-03 3.99E-03

6.75 171.45 4345.6269 13.709 4.96E-01 6.64E+00 3.01E+00 8.34E-03 3.78E-03

7.00 177.80 4442.1964 14.013 5.24E-01 7.01E+00 3.18E+00 7.88E-03 3.57E-03

7.25 184.15 4538.7658 14.318 5.53E-01 7.39E+00 3.35E+00 7.40E-03 3.36E-03

7.50 190.50 4635.3353 14.622 5.82E-01 7.78E+00 3.53E+00 6.92E-03 3.14E-03

7.75 196.85 4731.9048 14.927 6.12E-01 8.18E+00 3.71E+00 6.43E-03 2.92E-03

8.00 203.20 4828.4743 15.232 6.42E-01 8.59E+00 3.89E+00 5.93E-03 2.69E-03

8.25 209.55 4925.0438 15.536 6.73E-01 9.00E+00 4.08E+00 5.42E-03 2.46E-03

8.50 215.90 5021.6133 15.841 7.04E-01 9.42E+00 4.27E+00 4.89E-03 2.22E-03

8.75 222.25 5118.1828 16.146 7.37E-01 9.85E+00 4.47E+00 4.36E-03 1.98E-03

9.00 228.60 5214.7523 16.45 7.69E-01 1.03E+01 4.67E+00 3.82E-03 1.73E-03

9.25 234.95 4925.0438 15.536 8.02E-01 1.07E+01 4.86E+00 3.28E-03 1.49E-03

9.50 241.30 4635.3353 14.622 8.32E-01 1.11E+01 5.05E+00 2.78E-03 1.26E-03

9.75 247.65 4345.6269 13.709 8.60E-01 1.15E+01 5.22E+00 2.31E-03 1.05E-03

10.00 254.00 4055.9184 12.795 8.87E-01 1.19E+01 5.38E+00 1.87E-03 8.48E-04

10.25 260.35 3766.21 11.881 9.12E-01 1.22E+01 5.53E+00 1.46E-03 6.62E-04

10.50 266.70 3476.5015 10.967 9.35E-01 1.25E+01 5.67E+00 1.08E-03 4.89E-04

10.75 273.05 3186.793 10.053 9.56E-01 1.28E+01 5.80E+00 7.28E-04 3.30E-04

11.00 279.40 2897.0846 9.1391 9.75E-01 1.30E+01 5.92E+00 4.07E-04 1.85E-04

11.25 285.75 2607.3761 8.2252 9.93E-01 1.33E+01 6.02E+00 1.19E-04 5.41E-05

11.50 292.10 2317.6677 7.3112 1.00E+00 1.34E+01 6.07E+00 0.00E+00 0.00E+00

11.75 298.45 2027.9592 6.3973 1.00E+00 1.34E+01 6.07E+00 0.00E+00 0.00E+00

12.00 304.80 1738.2508 5.4834 1.00E+00 1.34E+01 6.07E+00 0.00E+00 0.00E+00

Results for RBHT Test 1617

Valid Time Period 810 to 990 seconds
A-349

Figure A-290 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1617A for Time Period 810 to 990 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-350

RBHT Two-Phase Mixture Level and Uncovery Test INT-1617-B 

Test Conditions

Date: 6/18/2003

Steady-state time window: 1220 – 1368 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.052 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.89 kW 
A-351

Figure A-291 Inlet Flow Plot for Experiment 1617B 

Figure A-292 Inlet Temperature Plot for Experiment 1617B 
A-352

Figure A-293 System Pressure Plot for Experiment 1617B 

Figure A-294 Bundle Power Plot for Experiment 1617B 
A-353

Table A-117: Data Results for RBHT Test 1617 for Time Period 1220 to 1368 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.815 10.568 506.019 0.083 3.974 0.012 0.575 0.000 0.000 10.47 501.306 4330.47 207344.0165 0.817 0.813 0.821

* 120-133 3048-3378 383 0.767 15.757 754.428 0.105 5.027 0.039 1.867 1.503 71.943 14.11 675.590 4344.58 208019.607 0.791 0.787 0.795

* 108-120 2743-3048 382 0.637 22.648 1084.397 0.092 4.405 0.048 2.298 6.268 300.119 16.24 777.575 4360.82 208797.1823 0.739 0.735 0.743

100-108 2540-2743 381 0.711 11.997 574.400 0.056 2.681 0.035 1.676 0.000 0.000 11.9 569.775 4372.72 209366.9574 0.713 0.709 0.717

97-100 2464-2540 380 0.562 6.824 326.737 0.020 0.958 0.013 0.622 0.000 0.000 6.79 325.107 4379.51 209692.0643 0.564 0.561 0.567

93-97 2362-2464 379 0.579 8.751 418.989 0.025 1.197 0.017 0.814 0.000 0.000 8.705 416.798 4388.215 210108.862 0.581 0.578 0.584

* 85-93 2159-2362 378 0.435 23.474 1123.934 0.046 2.202 0.032 1.532 8.226 393.856 15.17 726.343 4403.385 210835.2055 0.635 0.632 0.638

81-85 2057-2159 377 0.687 6.502 311.320 0.021 1.005 0.015 0.718 0.000 0.000 6.463 309.450 4409.848 211144.6556 0.689 0.686 0.692

78-81 1981-2057 376 0.688 4.856 232.495 0.015 0.718 0.011 0.527 0.000 0.000 4.827 231.118 4414.675 211375.7736 0.69 0.687 0.693

75-78 1905-1981 375 0.547 7.053 337.678 0.015 0.718 0.011 0.527 0.000 0.000 7.024 336.311 4421.699 211712.0845 0.549 0.546 0.552

72-75 1829-1905 374 0.483 8.050 385.420 0.014 0.670 0.011 0.527 0.000 0.000 8.024 384.191 4429.723 212096.2757 0.485 0.483 0.487

* 67-72 1702-1829 373 0.391 15.803 756.666 0.022 1.053 0.017 0.814 4.134 197.951 11.63 556.847 4441.353 212653.1231 0.552 0.549 0.555

63-67 1600-1702 372 0.618 7.946 380.447 0.016 0.766 0.013 0.622 0.000 0.000 7.915 378.972 4449.268 213032.0953 0.619 0.616 0.622

60-63 1524-1600 371 0.424 8.969 429.432 0.011 0.527 0.010 0.479 0.000 0.000 8.945 428.289 4458.213 213460.3842 0.426 0.424 0.428

57-60 1448-1524 370 0.407 9.234 442.114 0.011 0.527 0.009 0.431 0.000 0.000 9.209 440.929 4467.422 213901.3135 0.409 0.407 0.411

53-57 1346-1448 369 0.395 12.568 601.752 0.013 0.622 0.012 0.575 0.000 0.000 12.54 600.418 4479.962 214501.7319 0.396 0.394 0.398

* 46-53 1168-1346 368 0.290 25.816 1236.079 0.021 1.005 0.020 0.958 6.165 295.184 19.61 938.932 4499.572 215440.6638 0.46 0.458 0.462

43-46 1092-1168 367 0.523 7.426 355.581 0.008 0.383 0.008 0.383 0.000 0.000 7.406 354.601 4506.978 215795.2649 0.525 0.522 0.528

37-43 940-1092 366 0.390 19.013 910.337 0.015 0.718 0.016 0.766 0.000 0.000 18.98 908.767 4525.958 216704.0322 0.391 0.389 0.393

* 25-37 635-940 365 0.253 46.537 2228.224 0.023 1.101 0.028 1.341 3.706 177.465 42.78 2048.317 4568.738 218752.3496 0.313 0.311 0.315

13-25 330-635 364 0.235 47.654 2281.686 0.014 0.670 0.024 1.149 0.000 0.000 47.6 2279.100 4616.338 221031.4498 0.236 0.235 0.237

* 0-13 0-330 363 0.057 63.639 3047.055 0.006 0.287 0.012 0.575 4.091 195.881 59.53 2850.312 4675.868 223881.7615 0.118 0.117 0.119

Results for RBHT Test 1617

Valid Time Period 1220 to 1368 seconds

Collapsed Liquid Level = 76.142 inches = 1934.00 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-117 Data Results for RBHT Test 1617

B for Time Period 1220 to 1368 seconds
A-354

Table A-118 Energy Balance Results for RBHT Test 1617B for Time Period 1220 to 1368 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1739.0449 5.4859 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.25 6.35 1835.6585 5.7907 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.50 12.70 1932.2721 6.0955 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.75 19.05 2028.8857 6.4003 1.08E-02 1.46E-01 6.63E-02 1.66E-02 7.52E-03

1.00 25.40 2125.4993 6.705 2.38E-02 3.22E-01 1.46E-01 1.63E-02 7.42E-03

1.25 31.75 2222.1129 7.0098 3.75E-02 5.07E-01 2.30E-01 1.61E-02 7.31E-03

1.50 38.10 2318.7265 7.3146 5.17E-02 7.00E-01 3.17E-01 1.59E-02 7.20E-03

1.75 44.45 2415.3401 7.6194 6.66E-02 9.01E-01 4.08E-01 1.56E-02 7.09E-03

2.00 50.80 2511.9537 7.9241 8.20E-02 1.11E+00 5.03E-01 1.54E-02 6.97E-03

2.25 57.15 2608.5673 8.2289 9.81E-02 1.33E+00 6.02E-01 1.51E-02 6.85E-03

2.50 63.50 2705.1809 8.5337 1.15E-01 1.55E+00 7.04E-01 1.48E-02 6.73E-03

2.75 69.85 2801.7945 8.8385 1.32E-01 1.79E+00 8.10E-01 1.45E-02 6.59E-03

3.00 76.20 2898.4081 9.1432 1.50E-01 2.03E+00 9.20E-01 1.42E-02 6.46E-03

3.25 82.55 2995.0217 9.448 1.68E-01 2.28E+00 1.03E+00 1.39E-02 6.32E-03

3.50 88.90 3091.6353 9.7528 1.88E-01 2.54E+00 1.15E+00 1.36E-02 6.17E-03

3.75 95.25 3188.2489 10.058 2.07E-01 2.80E+00 1.27E+00 1.33E-02 6.02E-03

4.00 101.60 3284.8625 10.362 2.28E-01 3.08E+00 1.40E+00 1.29E-02 5.87E-03

4.25 107.95 3381.4761 10.667 2.48E-01 3.36E+00 1.52E+00 1.26E-02 5.71E-03

4.50 114.30 3478.0897 10.972 2.70E-01 3.65E+00 1.66E+00 1.22E-02 5.55E-03

4.75 120.65 3574.7033 11.277 2.92E-01 3.95E+00 1.79E+00 1.19E-02 5.38E-03

5.00 127.00 3671.3169 11.581 3.15E-01 4.26E+00 1.93E+00 1.15E-02 5.21E-03

5.25 133.35 3767.9305 11.886 3.38E-01 4.57E+00 2.07E+00 1.11E-02 5.03E-03

5.50 139.70 3864.5441 12.191 3.62E-01 4.90E+00 2.22E+00 1.07E-02 4.85E-03

5.75 146.05 3961.1577 12.496 3.87E-01 5.23E+00 2.37E+00 1.03E-02 4.66E-03

6.00 152.40 4057.7713 12.801 4.12E-01 5.57E+00 2.53E+00 9.85E-03 4.47E-03

6.25 158.75 4154.3849 13.105 4.38E-01 5.92E+00 2.68E+00 9.42E-03 4.27E-03

6.50 165.10 4250.9985 13.41 4.64E-01 6.28E+00 2.85E+00 8.98E-03 4.07E-03

6.75 171.45 4347.6121 13.715 4.91E-01 6.64E+00 3.01E+00 8.53E-03 3.87E-03

7.00 177.80 4444.2257 14.02 5.18E-01 7.01E+00 3.18E+00 8.07E-03 3.66E-03

7.25 184.15 4540.8393 14.324 5.47E-01 7.40E+00 3.35E+00 7.59E-03 3.44E-03

7.50 190.50 4637.4529 14.629 5.75E-01 7.78E+00 3.53E+00 7.11E-03 3.23E-03

7.75 196.85 4734.0665 14.934 6.05E-01 8.18E+00 3.71E+00 6.62E-03 3.00E-03

8.00 203.20 4830.6801 15.239 6.35E-01 8.59E+00 3.90E+00 6.12E-03 2.77E-03

8.25 209.55 4927.2937 15.543 6.65E-01 9.00E+00 4.08E+00 5.60E-03 2.54E-03

8.50 215.90 5023.9073 15.848 6.97E-01 9.42E+00 4.27E+00 5.08E-03 2.30E-03

8.75 222.25 5120.5209 16.153 7.29E-01 9.86E+00 4.47E+00 4.55E-03 2.06E-03

9.00 228.60 5217.1346 16.458 7.61E-01 1.03E+01 4.67E+00 4.00E-03 1.82E-03

9.25 234.95 4927.2937 15.543 7.93E-01 1.07E+01 4.86E+00 3.47E-03 1.57E-03

9.50 241.30 4637.4529 14.629 8.23E-01 1.11E+01 5.05E+00 2.97E-03 1.35E-03

9.75 247.65 4347.6121 13.715 8.51E-01 1.15E+01 5.22E+00 2.50E-03 1.13E-03

10.00 254.00 4057.7713 12.801 8.77E-01 1.19E+01 5.38E+00 2.06E-03 9.32E-04

10.25 260.35 3767.9305 11.886 9.02E-01 1.22E+01 5.53E+00 1.64E-03 7.46E-04

10.50 266.70 3478.0897 10.972 9.25E-01 1.25E+01 5.67E+00 1.26E-03 5.74E-04

10.75 273.05 3188.2489 10.058 9.46E-01 1.28E+01 5.80E+00 9.13E-04 4.14E-04

11.00 279.40 2898.4081 9.1432 9.65E-01 1.31E+01 5.92E+00 5.93E-04 2.69E-04

11.25 285.75 2608.5673 8.2289 9.82E-01 1.33E+01 6.03E+00 3.05E-04 1.38E-04

11.50 292.10 2318.7265 7.3146 9.97E-01 1.35E+01 6.12E+00 4.52E-05 2.05E-05

11.75 298.45 2028.8857 6.4003 1.00E+00 1.35E+01 6.14E+00 0.00E+00 0.00E+00

12.00 304.80 1739.0449 5.4859 1.00E+00 1.35E+01 6.14E+00 0.00E+00 0.00E+00

Results for RBHT Test 1617

Valid Time Period 1220 to 1368 seconds
A-355

Figure A-295 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1617B for Time Period 1220 to 1368 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-356

RBHT Two-Phase Mixture Level and Uncovery Test INT-1617-C 

Test Conditions

Date: 6/18/2003

Steady-state time window: 1620 – 1770 seconds

Inlet flow rate: 0.376 cm/sec (0.148 in./sec) 

Inlet mass flow rate: 0.017 kg/sec (0.038 lbm/sec) 

Inlet flow temperature: 381.8 K (227.5 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.89 kW 
A-357

Figure A-296 Inlet Flow Plot for Experiment 1617C 

Figure A-297 Inlet Temperature Plot for Experiment 1617C 
A-358

Figure A-298 System Pressure Plot for Experiment 1617C 

Figure A-299 Bundle Power Plot for Experiment 1617C 
A-359

Table A-119: Data Results for RBHT Test 1617 for Time Period 1620 to 1770 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.961 2.202 105.431 0.029 1.389 0.000 0.000 0.000 0.000 2.173 104.044 4322.173 206946.754 0.962 0.957 0.967

* 120-133 3048-3378 383 0.912 5.926 283.719 0.035 1.676 0.000 0.000 0.034 1.608 5.857 280.435 4328.03 207227.1887 0.913 0.908 0.918

* 108-120 2743-3048 382 0.761 14.879 712.405 0.032 1.532 0.000 0.000 3.367 161.208 11.48 549.665 4339.51 207776.8541 0.816 0.812 0.820

100-108 2540-2743 381 0.766 9.732 465.985 0.036 1.724 0.017 0.814 0.000 0.000 9.677 463.337 4349.187 208240.1913 0.767 0.763 0.771

97-100 2464-2540 380 0.667 5.183 248.161 0.014 0.670 0.009 0.431 0.000 0.000 5.159 247.014 4354.346 208487.2055 0.669 0.666 0.672

93-97 2362-2464 379 0.659 7.089 339.418 0.018 0.862 0.012 0.575 0.000 0.000 7.054 337.747 4361.4 208824.9529 0.66 0.657 0.663

* 85-93 2159-2362 378 0.468 22.087 1057.542 0.034 1.628 0.024 1.149 8.779 420.352 13.25 634.413 4374.65 209459.3663 0.681 0.678 0.684

81-85 2057-2159 377 0.700 6.227 298.141 0.016 0.766 0.011 0.527 0.000 0.000 6.196 296.666 4380.846 209756.0324 0.702 0.698 0.706

78-81 1981-2057 376 0.692 4.799 229.760 0.011 0.527 0.008 0.383 0.000 0.000 4.779 228.820 4385.625 209984.8521 0.693 0.690 0.696

75-78 1905-1981 375 0.559 6.876 329.223 0.011 0.527 0.008 0.383 0.000 0.000 6.855 328.219 4392.48 210313.0713 0.56 0.557 0.563

72-75 1829-1905 374 0.498 7.816 374.230 0.010 0.479 0.008 0.383 0.000 0.000 7.793 373.131 4400.273 210686.2021 0.5 0.498 0.503

* 67-72 1702-1829 373 0.389 15.871 759.899 0.016 0.766 0.013 0.622 4.472 214.112 11.37 544.399 4411.643 211230.6006 0.562 0.559 0.565

63-67 1600-1702 372 0.623 7.832 374.976 0.012 0.575 0.010 0.479 0.000 0.000 7.809 373.897 4419.452 211604.4976 0.624 0.621 0.627

60-63 1524-1600 371 0.431 8.870 424.708 0.008 0.383 0.007 0.335 0.000 0.000 8.854 423.932 4428.306 212028.4294 0.432 0.430 0.434

57-60 1448-1524 370 0.418 9.073 434.405 0.008 0.383 0.007 0.335 0.000 0.000 9.055 433.556 4437.361 212461.9851 0.419 0.417 0.421

53-57 1346-1448 369 0.399 12.490 598.022 0.010 0.479 0.009 0.431 0.000 0.000 12.47 597.067 4449.831 213059.0519 0.4 0.398 0.402

* 46-53 1168-1346 368 0.291 25.759 1233.344 0.015 0.718 0.015 0.718 6.299 301.594 19.43 930.313 4469.261 213989.3653 0.465 0.463 0.467

43-46 1092-1168 367 0.530 7.317 350.359 0.006 0.287 0.006 0.287 0.000 0.000 7.304 349.717 4476.565 214339.0827 0.531 0.528 0.534

37-43 940-1092 366 0.407 18.493 885.471 0.011 0.527 0.012 0.575 0.000 0.000 18.46 883.870 4495.025 215222.9522 0.407 0.405 0.409

* 25-37 635-940 365 0.262 46.008 2202.861 0.017 0.814 0.021 1.005 4.320 206.829 41.65 1994.213 4536.675 217217.1649 0.331 0.329 0.333

13-25 330-635 364 0.255 46.418 2222.505 0.011 0.527 0.018 0.862 0.000 0.000 46.38 2220.686 4583.055 219437.8512 0.256 0.255 0.257

* 0-13 0-330 363 0.070 62.813 3007.518 0.005 0.239 0.011 0.527 3.927 188.041 58.87 2818.711 4641.925 222256.562 0.128 0.127 0.129

 (Z2φ) Two-Phase Level (Dryout) = 124.70 inches = 3167.38 mm

 (S) Level Swell = 1.906

Results for RBHT Test 1617

Valid Time Period 1620 to 1770 seconds

Collapsed Liquid Level = 67.609 inches = 1717.27 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-119 Data Results for RBHT Test 1617

C for Time Period 1620 to 1770 seconds
A-360

Table A-120 Energy Balance Results for RBHT Test 1617C for Time Period 1620 to 1770 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1740.5739 5.4908 0.00E+00 0.00E+00 0.00E+00 1.24E-02 5.62E-03

0.25 6.35 1837.2725 5.7958 0.00E+00 0.00E+00 0.00E+00 1.24E-02 5.62E-03

0.50 12.70 1933.971 6.1008 7.56E-03 7.57E-02 3.44E-02 1.23E-02 5.58E-03

0.75 19.05 2030.6696 6.4059 2.44E-02 2.44E-01 1.11E-01 1.21E-02 5.49E-03

1.00 25.40 2127.3681 6.7109 4.20E-02 4.21E-01 1.91E-01 1.19E-02 5.39E-03

1.25 31.75 2224.0667 7.016 6.04E-02 6.05E-01 2.75E-01 1.17E-02 5.28E-03

1.50 38.10 2320.7652 7.321 7.97E-02 7.98E-01 3.62E-01 1.14E-02 5.18E-03

1.75 44.45 2417.4638 7.6261 9.98E-02 1.00E+00 4.53E-01 1.12E-02 5.06E-03

2.00 50.80 2514.1623 7.9311 1.21E-01 1.21E+00 5.48E-01 1.09E-02 4.95E-03

2.25 57.15 2610.8609 8.2361 1.42E-01 1.43E+00 6.47E-01 1.06E-02 4.82E-03

2.50 63.50 2707.5594 8.5412 1.65E-01 1.65E+00 7.50E-01 1.04E-02 4.70E-03

2.75 69.85 2804.258 8.8462 1.88E-01 1.89E+00 8.56E-01 1.01E-02 4.57E-03

3.00 76.20 2900.9565 9.1513 2.12E-01 2.13E+00 9.66E-01 9.77E-03 4.43E-03

3.25 82.55 2997.6551 9.4563 2.37E-01 2.38E+00 1.08E+00 9.46E-03 4.29E-03

3.50 88.90 3094.3536 9.7614 2.63E-01 2.64E+00 1.20E+00 9.14E-03 4.14E-03

3.75 95.25 3191.0522 10.066 2.90E-01 2.91E+00 1.32E+00 8.80E-03 3.99E-03

4.00 101.60 3287.7507 10.371 3.17E-01 3.18E+00 1.44E+00 8.47E-03 3.84E-03

4.25 107.95 3384.4493 10.676 3.46E-01 3.46E+00 1.57E+00 8.11E-03 3.68E-03

4.50 114.30 3481.1478 10.982 3.75E-01 3.76E+00 1.70E+00 7.75E-03 3.52E-03

4.75 120.65 3577.8464 11.287 4.05E-01 4.05E+00 1.84E+00 7.38E-03 3.35E-03

5.00 127.00 3674.5449 11.592 4.35E-01 4.36E+00 1.98E+00 7.00E-03 3.18E-03

5.25 133.35 3771.2435 11.897 4.67E-01 4.68E+00 2.12E+00 6.61E-03 3.00E-03

5.50 139.70 3867.942 12.202 4.99E-01 5.00E+00 2.27E+00 6.21E-03 2.82E-03

5.75 146.05 3964.6406 12.507 5.32E-01 5.34E+00 2.42E+00 5.80E-03 2.63E-03

6.00 152.40 4061.3391 12.812 5.66E-01 5.68E+00 2.57E+00 5.38E-03 2.44E-03

6.25 158.75 4158.0377 13.117 6.01E-01 6.03E+00 2.73E+00 4.94E-03 2.24E-03

6.50 165.10 4254.7362 13.422 6.37E-01 6.38E+00 2.90E+00 4.50E-03 2.04E-03

6.75 171.45 4351.4348 13.727 6.73E-01 6.75E+00 3.06E+00 4.05E-03 1.84E-03

7.00 177.80 4448.1333 14.032 7.11E-01 7.12E+00 3.23E+00 3.59E-03 1.63E-03

7.25 184.15 4544.8319 14.337 7.49E-01 7.50E+00 3.40E+00 3.11E-03 1.41E-03

7.50 190.50 4641.5304 14.642 7.88E-01 7.89E+00 3.58E+00 2.63E-03 1.19E-03

7.75 196.85 4738.229 14.947 8.27E-01 8.29E+00 3.76E+00 2.14E-03 9.71E-04

8.00 203.20 4834.9275 15.252 8.68E-01 8.70E+00 3.95E+00 1.64E-03 7.42E-04

8.25 209.55 4931.6261 15.557 9.09E-01 9.11E+00 4.13E+00 1.12E-03 5.10E-04

8.50 215.90 5028.3246 15.862 9.52E-01 9.54E+00 4.33E+00 6.00E-04 2.72E-04

8.75 222.25 5125.0232 16.167 9.95E-01 9.97E+00 4.52E+00 6.70E-05 3.04E-05

9.00 228.60 5221.7217 16.472 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

9.25 234.95 4931.6261 15.557 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

9.50 241.30 4641.5304 14.642 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

9.75 247.65 4351.4348 13.727 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

10.00 254.00 4061.3391 12.812 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

10.25 260.35 3771.2435 11.897 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

10.50 266.70 3481.1478 10.982 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

10.75 273.05 3191.0522 10.066 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

11.00 279.40 2900.9565 9.1513 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

11.25 285.75 2610.8609 8.2361 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

11.50 292.10 2320.7652 7.321 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

11.75 298.45 2030.6696 6.4059 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

12.00 304.80 1740.5739 5.4908 1.00E+00 1.00E+01 4.55E+00 0.00E+00 0.00E+00

Results for RBHT Test 1617

Valid Time Period 1620 to 1770 seconds
A-361

Figure A-300 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1617C for Time Period 1620 to 1770 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-362

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-A 

Test Conditions

Date: 6/20/2003

Steady-state time window: 3050 – 3161 seconds

Inlet flow rate: 2.540 cm/sec (1.000 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.258 lbm/sec) 

Inlet flow temperature: 381.3 K (226.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.19 kW 
A-363

Figure A-301 Inlet Flow Plot for Experiment 1637A 

Figure A-302 Inlet Temperature Plot for Experiment 1637A 
A-364

Figure A-303 System Pressure Plot for Experiment 1637A 

Figure A-304 Bundle Power Plot for Experiment 1637A 
A-365

Table A-121: Data Results for RBHT Test 1637 for Time Period 3050 to 3161 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.749 14.339 686.545 0.747 35.767 0.163 7.804 0.000 0.000 13.43 643.032 4333.43 207485.7421 0.765 0.761 0.769

* 120-133 3048-3378 383 0.739 17.600 842.702 0.830 39.741 0.291 13.933 0.689 32.999 15.79 756.029 4349.22 208241.7713 0.766 0.762 0.770

* 108-120 2743-3048 382 0.678 20.077 961.312 0.695 33.277 0.363 17.381 4.579 219.264 14.44 691.391 4363.66 208933.1623 0.768 0.764 0.772

100-108 2540-2743 381 0.753 10.262 491.348 0.418 20.014 0.265 12.688 0.000 0.000 9.578 458.597 4373.238 209391.7594 0.769 0.765 0.773

97-100 2464-2540 380 0.666 5.199 248.907 0.147 7.038 0.096 4.597 0.000 0.000 4.953 237.151 4378.191 209628.9103 0.682 0.679 0.685

93-97 2362-2464 379 0.673 6.803 325.742 0.187 8.954 0.125 5.985 0.000 0.000 6.488 310.647 4384.679 209939.5574 0.688 0.685 0.691

* 85-93 2159-2362 378 0.495 20.965 1003.832 0.346 16.567 0.240 11.491 8.259 395.466 12.12 580.309 4396.799 210519.8661 0.708 0.704 0.712

81-85 2057-2159 377 0.716 5.905 282.724 0.159 7.613 0.115 5.506 0.000 0.000 5.631 269.614 4402.43 210789.4798 0.729 0.725 0.73378-81 1981-2057 376 0.673 5.089 243.685 0.114 5.458 0.084 4.022 0.000 0.000 4.892 234.230 4407.322 211023.71 0.686 0.683 0.68975-78 1905-1981 375 0.642 5.578 267.059 0.109 5.219 0.082 3.926 0.000 0.000 5.385 257.835 4412.707 211281.5452 0.654 0.651 0.65772-75 1829-1905 374 0.526 7.385 353.592 0.104 4.980 0.080 3.830 0.000 0.000 7.199 344.690 4419.906 211626.2352 0.538 0.535 0.541

* 67-72 1702-1829 373 0.431 14.770 707.183 0.162 7.757 0.130 6.224 4.118 197.163 10.36 496.039 4430.266 212122.2747 0.601 0.598 0.604

63-67 1600-1702 372 0.653 7.208 345.137 0.119 5.698 0.100 4.788 0.000 0.000 6.985 334.444 4437.251 212456.7183 0.664 0.661 0.66760-63 1524-1600 371 0.482 8.076 386.663 0.084 4.022 0.073 3.495 0.000 0.000 7.915 378.972 4445.166 212835.6905 0.492 0.490 0.49457-60 1448-1524 370 0.458 8.439 404.069 0.079 3.783 0.071 3.399 0.000 0.000 8.287 396.784 4453.453 213232.4742 0.468 0.466 0.47053-57 1346-1448 369 0.425 11.939 571.665 0.097 4.644 0.092 4.405 0.000 0.000 11.75 562.593 4465.203 213795.0672 0.434 0.432 0.436

* 46-53 1168-1346 368 0.329 24.409 1168.692 0.150 7.182 0.152 7.278 4.777 228.707 19.33 925.525 4484.533 214720.5926 0.468 0.466 0.470

43-46 1092-1168 367 0.494 7.878 377.214 0.056 2.681 0.062 2.969 0.000 0.000 7.755 371.311 4492.288 215091.904 0.502 0.499 0.50537-43 940-1092 366 0.397 18.805 900.391 0.096 4.597 0.118 5.650 0.000 0.000 18.59 890.094 4510.878 215981.9979 0.403 0.401 0.405

* 25-37 635-940 365 0.225 48.308 2313.016 0.128 6.129 0.214 10.246 0.366 17.541 47.6 2279.100 4558.478 218261.0982 0.236 0.235 0.237

13-25 330-635 364 0.067 58.176 2785.467 0.048 2.298 0.082 3.926 0.000 0.000 58.03 2778.491 4616.508 221039.5895 0.069 0.066 0.072

* 0-13 0-330 363 0.042 64.688 3097.284 0.004 0.192 0.000 0.000 -0.496 -23.743 65.18 3120.835 4681.688 224160.4246 0.034 0.032 0.036

Results for RBHT Test 1637

Valid Time Period 3050 to 3161 seconds

Collapsed Liquid Level = 75.314 inches = 1912.97 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-121 Data Results for RBHT Test 1637

A for Time Period 3050 to 3161 seconds
A-366

Table A-122 Energy Balance Results for RBHT Test 1637A for Time Period 3050 to 3161 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2618.9511 8.2617 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.25 6.35 2764.4483 8.7206 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.50 12.70 2909.9456 9.1796 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.75 19.05 3055.4429 9.6386 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.00 25.40 3200.9402 10.098 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.25 31.75 3346.4375 10.557 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.50 38.10 3491.9348 11.016 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.75 44.45 3637.432 11.475 1.71E-03 1.16E-01 5.25E-02 8.35E-02 3.79E-02

2.00 50.80 3782.9293 11.934 6.38E-03 4.31E-01 1.95E-01 8.31E-02 3.77E-02

2.25 57.15 3928.4266 12.393 1.12E-02 7.58E-01 3.44E-01 8.27E-02 3.75E-02

2.50 63.50 4073.9239 12.851 1.63E-02 1.10E+00 4.98E-01 8.23E-02 3.73E-02

2.75 69.85 4219.4212 13.31 2.15E-02 1.45E+00 6.57E-01 8.19E-02 3.71E-02

3.00 76.20 4364.9184 13.769 2.69E-02 1.81E+00 8.23E-01 8.14E-02 3.69E-02

3.25 82.55 4510.4157 14.228 3.24E-02 2.19E+00 9.94E-01 8.09E-02 3.67E-02

3.50 88.90 4655.913 14.687 3.82E-02 2.58E+00 1.17E+00 8.05E-02 3.65E-02

3.75 95.25 4801.4103 15.146 4.41E-02 2.98E+00 1.35E+00 8.00E-02 3.63E-02

4.00 101.60 4946.9076 15.605 5.02E-02 3.39E+00 1.54E+00 7.94E-02 3.60E-02

4.25 107.95 5092.4048 16.064 5.66E-02 3.82E+00 1.73E+00 7.89E-02 3.58E-02

4.50 114.30 5237.9021 16.523 6.30E-02 4.26E+00 1.93E+00 7.84E-02 3.56E-02

4.75 120.65 5383.3994 16.982 6.97E-02 4.71E+00 2.14E+00 7.78E-02 3.53E-02

5.00 127.00 5528.8967 17.441 7.66E-02 5.17E+00 2.35E+00 7.72E-02 3.50E-02

5.25 133.35 5674.394 17.9 8.36E-02 5.65E+00 2.56E+00 7.67E-02 3.48E-02

5.50 139.70 5819.8913 18.359 9.08E-02 6.14E+00 2.78E+00 7.61E-02 3.45E-02

5.75 146.05 5965.3885 18.818 9.82E-02 6.64E+00 3.01E+00 7.54E-02 3.42E-02

6.00 152.40 6110.8858 19.277 1.06E-01 7.15E+00 3.24E+00 7.48E-02 3.39E-02

6.25 158.75 6256.3831 19.736 1.14E-01 7.68E+00 3.48E+00 7.41E-02 3.36E-02

6.50 165.10 6401.8804 20.195 1.22E-01 8.21E+00 3.72E+00 7.35E-02 3.33E-02

6.75 171.45 6547.3777 20.654 1.30E-01 8.76E+00 3.98E+00 7.28E-02 3.30E-02

7.00 177.80 6692.8749 21.113 1.38E-01 9.32E+00 4.23E+00 7.21E-02 3.27E-02

7.25 184.15 6838.3722 21.572 1.47E-01 9.90E+00 4.49E+00 7.14E-02 3.24E-02

7.50 190.50 6983.8695 22.031 1.55E-01 1.05E+01 4.76E+00 7.07E-02 3.21E-02

7.75 196.85 7129.3668 22.49 1.64E-01 1.11E+01 5.03E+00 6.99E-02 3.17E-02

8.00 203.20 7274.8641 22.949 1.73E-01 1.17E+01 5.31E+00 6.92E-02 3.14E-02

8.25 209.55 7420.3614 23.408 1.82E-01 1.23E+01 5.59E+00 6.84E-02 3.10E-02

8.50 215.90 7565.8586 23.867 1.92E-01 1.30E+01 5.88E+00 6.76E-02 3.07E-02

8.75 222.25 7711.3559 24.326 2.01E-01 1.36E+01 6.17E+00 6.68E-02 3.03E-02

9.00 228.60 7856.8532 24.785 2.11E-01 1.43E+01 6.47E+00 6.60E-02 2.99E-02

9.25 234.95 7420.3614 23.408 2.21E-01 1.49E+01 6.76E+00 6.52E-02 2.96E-02

9.50 241.30 6983.8695 22.031 2.30E-01 1.55E+01 7.04E+00 6.44E-02 2.92E-02

9.75 247.65 6547.3777 20.654 2.38E-01 1.61E+01 7.30E+00 6.37E-02 2.89E-02

10.00 254.00 6110.8858 19.277 2.46E-01 1.66E+01 7.55E+00 6.31E-02 2.86E-02

10.25 260.35 5674.394 17.9 2.54E-01 1.71E+01 7.77E+00 6.24E-02 2.83E-02

10.50 266.70 5237.9021 16.523 2.60E-01 1.76E+01 7.98E+00 6.19E-02 2.81E-02

10.75 273.05 4801.4103 15.146 2.67E-01 1.80E+01 8.17E+00 6.13E-02 2.78E-02

11.00 279.40 4364.9184 13.769 2.73E-01 1.84E+01 8.35E+00 6.09E-02 2.76E-02

11.25 285.75 3928.4266 12.393 2.78E-01 1.88E+01 8.51E+00 6.04E-02 2.74E-02

11.50 292.10 3491.9348 11.016 2.82E-01 1.91E+01 8.66E+00 6.00E-02 2.72E-02

11.75 298.45 3055.4429 9.6386 2.87E-01 1.94E+01 8.78E+00 5.97E-02 2.71E-02

12.00 304.80 2618.9511 8.2617 2.90E-01 1.96E+01 8.89E+00 5.94E-02 2.69E-02

Results for RBHT Test 1637

Valid Time Period 3050 to 3161 seconds
A-367

Figure A-305 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637A for Time Period 3050 to 3161 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-368

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-B 

Test Conditions

Date: 6/20/2003

Steady-state time window: 3400 – 3491 seconds

Inlet flow rate: 2.543 cm/sec (1.001 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.259 lbm/sec) 

Inlet flow temperature: 381.3 K (226.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 81.19 kW 
A-369

Figure A-306 Inlet Flow Plot for Experiment 1637B 

Figure A-307 Inlet Temperature Plot for Experiment 1637B 
A-370

Figure A-308 System Pressure Plot for Experiment 1637B 

Figure A-309 Bundle Power Plot for Experiment 1637B 
A-371

Table A-123: Data Results for RBHT Test 1637 for Time Period 3400 to 3491 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.744 14.598 698.978 0.753 36.054 0.164 7.852 0.000 0.000 13.68 655.002 4333.68 207497.7122 0.761 0.757 0.765

* 120-133 3048-3378 383 0.735 17.922 858.119 0.836 40.028 0.292 13.981 0.624 29.886 16.17 774.224 4349.85 208271.9359 0.76 0.756 0.764

* 108-120 2743-3048 382 0.667 20.737 992.891 0.701 33.564 0.365 17.476 4.741 226.999 14.93 714.852 4364.78 208986.7881 0.76 0.756 0.764

100-108 2540-2743 381 0.744 10.646 509.749 0.421 20.158 0.267 12.784 0.000 0.000 9.956 476.696 4374.736 209463.484 0.76 0.756 0.764

97-100 2464-2540 380 0.647 5.500 263.329 0.148 7.086 0.097 4.644 0.000 0.000 5.251 251.419 4379.987 209714.9032 0.663 0.660 0.666

93-97 2362-2464 379 0.661 7.047 337.429 0.189 9.049 0.126 6.033 0.000 0.000 6.733 322.378 4386.72 210037.281 0.676 0.673 0.679

* 85-93 2159-2362 378 0.488 21.277 1018.752 0.350 16.758 0.242 11.587 8.145 389.988 12.54 600.418 4399.26 210637.6994 0.698 0.695 0.701

81-85 2057-2159 377 0.707 6.087 291.427 0.161 7.709 0.116 5.554 0.000 0.000 5.809 278.136 4405.069 210915.8358 0.72 0.716 0.72478-81 1981-2057 376 0.659 5.318 254.626 0.115 5.506 0.085 4.070 0.000 0.000 5.114 244.860 4410.183 211160.6955 0.672 0.669 0.67575-78 1905-1981 375 0.639 5.630 269.545 0.110 5.267 0.083 3.974 0.000 0.000 5.434 260.181 4415.617 211420.8768 0.651 0.648 0.65472-75 1829-1905 374 0.514 7.567 362.295 0.105 5.027 0.081 3.878 0.000 0.000 7.376 353.165 4422.993 211774.0415 0.526 0.523 0.529

* 67-72 1702-1829 373 0.424 14.952 715.886 0.163 7.804 0.130 6.224 4.049 193.848 10.61 508.010 4433.603 212282.0511 0.591 0.588 0.594

63-67 1600-1702 372 0.645 7.369 352.846 0.121 5.794 0.101 4.836 0.000 0.000 7.148 342.248 4440.751 212624.2992 0.656 0.653 0.65960-63 1524-1600 371 0.472 8.221 393.626 0.085 4.070 0.073 3.495 0.000 0.000 8.058 385.819 4448.809 213010.1183 0.483 0.481 0.48557-60 1448-1524 370 0.446 8.637 413.518 0.080 3.830 0.071 3.399 0.000 0.000 8.484 406.216 4457.293 213416.3344 0.455 0.453 0.45753-57 1346-1448 369 0.415 12.158 582.108 0.099 4.740 0.092 4.405 0.000 0.000 11.96 572.648 4469.253 213988.9822 0.424 0.422 0.426

* 46-53 1168-1346 368 0.323 24.627 1179.136 0.152 7.278 0.153 7.326 4.752 227.516 19.57 937.017 4488.823 214925.9989 0.462 0.460 0.464

43-46 1092-1168 367 0.491 7.925 379.452 0.057 2.729 0.062 2.969 0.000 0.000 7.801 373.514 4496.624 215299.5128 0.499 0.497 0.50137-43 940-1092 366 0.388 19.080 913.569 0.098 4.692 0.119 5.698 0.000 0.000 18.85 902.543 4515.474 216202.0556 0.395 0.393 0.397

* 25-37 635-940 365 0.221 48.563 2325.201 0.132 6.320 0.215 10.294 0.696 33.316 47.52 2275.270 4562.994 218477.3254 0.237 0.236 0.238

13-25 330-635 364 0.077 57.501 2753.141 0.051 2.442 0.091 4.357 0.000 0.000 57.34 2745.454 4620.334 221222.7793 0.08 0.076 0.084

* 0-13 0-330 363 0.042 64.678 3096.786 0.004 0.192 0.000 0.000 -0.126 -6.046 64.8 3102.641 4685.134 224325.42 0.04 0.038 0.042

Results for RBHT Test 1637

Valid Time Period 3400 to 3491 seconds

Collapsed Liquid Level = 75.294 inches = 1912.48 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-123 Data Results for RBHT Test 1637

B for Time Period 3400 to 3491 seconds
A-372

Table A-124 Energy Balance Results for RBHT Test 1637B for Time Period 3400 to 3491 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2620.3506 8.2661 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.25 6.35 2765.9257 8.7253 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.50 12.70 2911.5007 9.1845 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

0.75 19.05 3057.0757 9.6438 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.00 25.40 3202.6508 10.103 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.25 31.75 3348.2258 10.562 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.50 38.10 3493.8008 11.021 0.00E+00 0.00E+00 0.00E+00 8.40E-02 3.81E-02

1.75 44.45 3639.3759 11.481 2.46E-03 1.67E-01 7.58E-02 8.38E-02 3.80E-02

2.00 50.80 3784.9509 11.94 7.10E-03 4.83E-01 2.19E-01 8.34E-02 3.78E-02

2.25 57.15 3930.5259 12.399 1.19E-02 8.11E-01 3.68E-01 8.30E-02 3.77E-02

2.50 63.50 4076.101 12.858 1.69E-02 1.15E+00 5.22E-01 8.26E-02 3.75E-02

2.75 69.85 4221.676 13.318 2.21E-02 1.50E+00 6.82E-01 8.22E-02 3.73E-02

3.00 76.20 4367.251 13.777 2.75E-02 1.87E+00 8.47E-01 8.17E-02 3.71E-02

3.25 82.55 4512.8261 14.236 3.30E-02 2.24E+00 1.02E+00 8.13E-02 3.69E-02

3.50 88.90 4658.4011 14.695 3.88E-02 2.63E+00 1.19E+00 8.08E-02 3.66E-02

3.75 95.25 4803.9762 15.154 4.47E-02 3.04E+00 1.38E+00 8.03E-02 3.64E-02

4.00 101.60 4949.5512 15.614 5.08E-02 3.45E+00 1.57E+00 7.98E-02 3.62E-02

4.25 107.95 5095.1262 16.073 5.71E-02 3.88E+00 1.76E+00 7.92E-02 3.59E-02

4.50 114.30 5240.7013 16.532 6.35E-02 4.32E+00 1.96E+00 7.87E-02 3.57E-02

4.75 120.65 5386.2763 16.991 7.02E-02 4.77E+00 2.16E+00 7.81E-02 3.54E-02

5.00 127.00 5531.8513 17.451 7.70E-02 5.23E+00 2.37E+00 7.76E-02 3.52E-02

5.25 133.35 5677.4264 17.91 8.40E-02 5.71E+00 2.59E+00 7.70E-02 3.49E-02

5.50 139.70 5823.0014 18.369 9.12E-02 6.20E+00 2.81E+00 7.64E-02 3.46E-02

5.75 146.05 5968.5764 18.828 9.86E-02 6.70E+00 3.04E+00 7.58E-02 3.44E-02

6.00 152.40 6114.1515 19.288 1.06E-01 7.21E+00 3.27E+00 7.51E-02 3.41E-02

6.25 158.75 6259.7265 19.747 1.14E-01 7.74E+00 3.51E+00 7.45E-02 3.38E-02

6.50 165.10 6405.3015 20.206 1.22E-01 8.28E+00 3.75E+00 7.38E-02 3.35E-02

6.75 171.45 6550.8766 20.665 1.30E-01 8.83E+00 4.00E+00 7.31E-02 3.32E-02

7.00 177.80 6696.4516 21.124 1.38E-01 9.39E+00 4.26E+00 7.24E-02 3.28E-02

7.25 184.15 6842.0266 21.584 1.47E-01 9.96E+00 4.52E+00 7.17E-02 3.25E-02

7.50 190.50 6987.6017 22.043 1.55E-01 1.06E+01 4.79E+00 7.10E-02 3.22E-02

7.75 196.85 7133.1767 22.502 1.64E-01 1.12E+01 5.06E+00 7.02E-02 3.19E-02

8.00 203.20 7278.7517 22.961 1.73E-01 1.18E+01 5.33E+00 6.95E-02 3.15E-02

8.25 209.55 7424.3268 23.421 1.82E-01 1.24E+01 5.62E+00 6.87E-02 3.12E-02

8.50 215.90 7569.9018 23.88 1.92E-01 1.30E+01 5.91E+00 6.79E-02 3.08E-02

8.75 222.25 7715.4769 24.339 2.01E-01 1.37E+01 6.20E+00 6.71E-02 3.04E-02

9.00 228.60 7861.0519 24.798 2.11E-01 1.43E+01 6.50E+00 6.63E-02 3.01E-02

9.25 234.95 7424.3268 23.421 2.21E-01 1.50E+01 6.80E+00 6.55E-02 2.97E-02

9.50 241.30 6987.6017 22.043 2.30E-01 1.56E+01 7.07E+00 6.47E-02 2.94E-02

9.75 247.65 6550.8766 20.665 2.38E-01 1.62E+01 7.34E+00 6.40E-02 2.90E-02

10.00 254.00 6114.1515 19.288 2.46E-01 1.67E+01 7.58E+00 6.34E-02 2.87E-02

10.25 260.35 5677.4264 17.91 2.53E-01 1.72E+01 7.81E+00 6.27E-02 2.85E-02

10.50 266.70 5240.7013 16.532 2.60E-01 1.77E+01 8.02E+00 6.22E-02 2.82E-02

10.75 273.05 4803.9762 15.154 2.66E-01 1.81E+01 8.21E+00 6.16E-02 2.80E-02

11.00 279.40 4367.251 13.777 2.72E-01 1.85E+01 8.39E+00 6.12E-02 2.77E-02

11.25 285.75 3930.5259 12.399 2.77E-01 1.88E+01 8.55E+00 6.07E-02 2.75E-02

11.50 292.10 3493.8008 11.021 2.82E-01 1.92E+01 8.69E+00 6.03E-02 2.74E-02

11.75 298.45 3057.0757 9.6438 2.86E-01 1.94E+01 8.81E+00 6.00E-02 2.72E-02

12.00 304.80 2620.3506 8.2661 2.90E-01 1.97E+01 8.93E+00 5.97E-02 2.71E-02

Results for RBHT Test 1637

Valid Time Period 3400 to 3491 seconds
A-373

Figure A-310 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637B for Time Period 3400 to 3491 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-374

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-C 

Test Conditions

Date: 6/20/2003

Steady-state time window: 3722 – 3805 seconds

Inlet flow rate: 2.540 cm/sec (1.000 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.258 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-375

Figure A-311 Inlet Flow Plot for Experiment 1637C 

Figure A-312 Inlet Temperature Plot for Experiment 1637C 
A-376

Figure A-313 System Pressure Plot for Experiment 1637C 

Figure A-314 Bundle Power Plot for Experiment 1637C 
A-377

Table A-125: Data Results for RBHT Test 1637 for Time Period 3722 to 3805 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.602 22.752 1089.371 0.536 25.664 0.108 5.171 0.000 0.000 22.1 1058.154 4342.1 207900.8639 0.613 0.610 0.616

* 120-133 3048-3378 383 0.644 24.019 1150.043 0.597 28.585 0.194 9.289 -2.462 -117.874 25.69 1230.044 4367.79 209130.9077 0.619 0.616 0.622

* 108-120 2743-3048 382 0.545 28.356 1357.673 0.501 23.988 0.242 11.587 4.693 224.682 22.92 1097.415 4390.71 210228.3232 0.632 0.629 0.635

100-108 2540-2743 381 0.627 15.497 741.995 0.301 14.412 0.177 8.475 0.000 0.000 15.01 718.683 4405.72 210947.0059 0.639 0.636 0.642

97-100 2464-2540 380 0.487 7.993 382.685 0.106 5.075 0.064 3.064 0.000 0.000 7.822 374.519 4413.542 211321.5252 0.498 0.496 0.500

93-97 2362-2464 379 0.525 9.862 472.201 0.135 6.464 0.083 3.974 0.000 0.000 9.64 461.566 4423.182 211783.0909 0.536 0.533 0.539

* 85-93 2159-2362 378 0.399 24.985 1196.294 0.249 11.922 0.160 7.661 7.306 349.818 17.27 826.892 4440.452 212609.983 0.584 0.581 0.587

81-85 2057-2159 377 0.624 7.821 374.479 0.114 5.458 0.077 3.687 0.000 0.000 7.629 365.278 4448.081 212975.2614 0.633 0.630 0.636

78-81 1981-2057 376 0.542 7.130 341.407 0.081 3.878 0.056 2.681 0.000 0.000 6.992 334.779 4455.073 213310.0402 0.551 0.548 0.554

75-78 1905-1981 375 0.496 7.858 376.220 0.077 3.687 0.055 2.633 0.000 0.000 7.721 369.683 4462.794 213679.7237 0.504 0.501 0.507

72-75 1829-1905 374 0.355 10.044 480.905 0.073 3.495 0.053 2.538 0.000 0.000 9.913 474.637 4472.707 214154.3606 0.364 0.362 0.366

* 67-72 1702-1829 373 0.385 15.980 765.121 0.114 5.458 0.086 4.118 1.090 52.184 14.69 703.361 4487.397 214857.7216 0.434 0.432 0.436

63-67 1600-1702 372 0.498 10.433 499.554 0.083 3.974 0.067 3.208 0.000 0.000 10.28 492.209 4497.677 215349.9307 0.505 0.502 0.50860-63 1524-1600 371 0.354 10.070 482.148 0.058 2.777 0.048 2.298 0.000 0.000 9.959 476.839 4507.636 215826.7701 0.361 0.359 0.363

57-60 1448-1524 370 0.337 10.324 494.332 0.054 2.586 0.047 2.250 0.000 0.000 10.22 489.336 4517.856 216316.1064 0.344 0.342 0.346

53-57 1346-1448 369 0.321 14.110 675.604 0.066 3.160 0.061 2.921 0.000 0.000 13.98 669.366 4531.836 216985.4724 0.327 0.325 0.329

* 46-53 1168-1346 368 0.239 27.675 1325.098 0.098 4.692 0.101 4.836 3.226 154.474 24.25 1161.096 4556.086 218146.5686 0.333 0.331 0.335

43-46 1092-1168 367 0.333 10.387 497.316 0.035 1.676 0.041 1.963 0.000 0.000 10.31 493.645 4566.396 218640.214 0.338 0.336 0.340

37-43 940-1092 366 0.235 23.827 1140.843 0.057 2.729 0.079 3.783 0.000 0.000 23.69 1134.283 4590.086 219774.4973 0.24 0.239 0.241

* 25-37 635-940 365 0.072 57.854 2770.050 0.061 2.921 0.120 5.746 4.493 215.111 53.18 2546.272 4643.266 222320.7694 0.147 0.146 0.148

13-25 330-635 364 0.053 59.001 2825.003 0.004 0.192 0.000 0.000 0.000 0.000 58.98 2823.978 4702.246 225144.747 0.053 0.050 0.056

* 0-13 0-330 363 0.042 64.699 3097.781 0.004 0.192 0.000 0.000 -0.995 -47.665 65.69 3145.254 4767.936 228290.001 0.027 0.026 0.028

Results for RBHT Test 1637

Valid Time Period 3722 to 3805 seconds

Collapsed Liquid Level = 90.719 inches = 2304.25 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-125 Data Results for RBHT Test 1637

C for Time Period 3722 to 3805 seconds
A-378

Table A-126 Energy Balance Results for RBHT Test 1637C for Time Period 3722 to 3805 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.1497 5.4989 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.25 6.35 1839.9914 5.8044 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.50 12.70 1936.833 6.1099 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.75 19.05 2033.6747 6.4154 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.00 25.40 2130.5163 6.7209 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.25 31.75 2227.358 7.0264 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.50 38.10 2324.1997 7.3319 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.75 44.45 2421.0413 7.6373 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

2.00 50.80 2517.883 7.9428 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

2.25 57.15 2614.7246 8.2483 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

2.50 63.50 2711.5663 8.5538 3.35E-03 2.26E-01 1.03E-01 8.33E-02 3.78E-02

2.75 69.85 2808.4079 8.8593 6.82E-03 4.61E-01 2.09E-01 8.30E-02 3.77E-02

3.00 76.20 2905.2496 9.1648 1.04E-02 7.04E-01 3.19E-01 8.27E-02 3.75E-02

3.25 82.55 3002.0912 9.4703 1.41E-02 9.54E-01 4.33E-01 8.24E-02 3.74E-02

3.50 88.90 3098.9329 9.7758 1.80E-02 1.21E+00 5.51E-01 8.21E-02 3.72E-02

3.75 95.25 3195.7745 10.081 2.19E-02 1.48E+00 6.72E-01 8.17E-02 3.71E-02

4.00 101.60 3292.6162 10.387 2.60E-02 1.76E+00 7.97E-01 8.14E-02 3.69E-02

4.25 107.95 3389.4578 10.692 3.02E-02 2.04E+00 9.26E-01 8.11E-02 3.68E-02

4.50 114.30 3486.2995 10.998 3.45E-02 2.33E+00 1.06E+00 8.07E-02 3.66E-02

4.75 120.65 3583.1411 11.303 3.90E-02 2.63E+00 1.19E+00 8.03E-02 3.64E-02

5.00 127.00 3679.9828 11.609 4.35E-02 2.94E+00 1.33E+00 7.99E-02 3.63E-02

5.25 133.35 3776.8244 11.914 4.82E-02 3.26E+00 1.48E+00 7.96E-02 3.61E-02

5.50 139.70 3873.6661 12.22 5.30E-02 3.58E+00 1.63E+00 7.91E-02 3.59E-02

5.75 146.05 3970.5077 12.525 5.80E-02 3.92E+00 1.78E+00 7.87E-02 3.57E-02

6.00 152.40 4067.3494 12.831 6.30E-02 4.26E+00 1.93E+00 7.83E-02 3.55E-02

6.25 158.75 4164.191 13.136 6.82E-02 4.61E+00 2.09E+00 7.79E-02 3.53E-02

6.50 165.10 4261.0327 13.442 7.35E-02 4.97E+00 2.25E+00 7.74E-02 3.51E-02

6.75 171.45 4357.8743 13.747 7.89E-02 5.33E+00 2.42E+00 7.70E-02 3.49E-02

7.00 177.80 4454.716 14.053 8.44E-02 5.71E+00 2.59E+00 7.65E-02 3.47E-02

7.25 184.15 4551.5577 14.358 9.01E-02 6.09E+00 2.76E+00 7.61E-02 3.45E-02

7.50 190.50 4648.3993 14.664 9.59E-02 6.48E+00 2.94E+00 7.56E-02 3.43E-02

7.75 196.85 4745.241 14.969 1.02E-01 6.88E+00 3.12E+00 7.51E-02 3.41E-02

8.00 203.20 4842.0826 15.275 1.08E-01 7.29E+00 3.31E+00 7.46E-02 3.38E-02

8.25 209.55 4938.9243 15.58 1.14E-01 7.71E+00 3.50E+00 7.41E-02 3.36E-02

8.50 215.90 5035.7659 15.886 1.20E-01 8.13E+00 3.69E+00 7.35E-02 3.34E-02

8.75 222.25 5132.6076 16.191 1.27E-01 8.56E+00 3.88E+00 7.30E-02 3.31E-02

9.00 228.60 5229.4492 16.497 1.33E-01 9.00E+00 4.08E+00 7.25E-02 3.29E-02

9.25 234.95 4938.9243 15.58 1.40E-01 9.43E+00 4.28E+00 7.19E-02 3.26E-02

9.50 241.30 4648.3993 14.664 1.46E-01 9.84E+00 4.46E+00 7.14E-02 3.24E-02

9.75 247.65 4357.8743 13.747 1.51E-01 1.02E+01 4.64E+00 7.09E-02 3.22E-02

10.00 254.00 4067.3494 12.831 1.57E-01 1.06E+01 4.80E+00 7.05E-02 3.20E-02

10.25 260.35 3776.8244 11.914 1.61E-01 1.09E+01 4.95E+00 7.01E-02 3.18E-02

10.50 266.70 3486.2995 10.998 1.66E-01 1.12E+01 5.09E+00 6.97E-02 3.16E-02

10.75 273.05 3195.7745 10.081 1.70E-01 1.15E+01 5.22E+00 6.94E-02 3.15E-02

11.00 279.40 2905.2496 9.1648 1.74E-01 1.18E+01 5.34E+00 6.90E-02 3.13E-02

11.25 285.75 2614.7246 8.2483 1.78E-01 1.20E+01 5.44E+00 6.87E-02 3.12E-02

11.50 292.10 2324.1997 7.3319 1.81E-01 1.22E+01 5.54E+00 6.85E-02 3.11E-02

11.75 298.45 2033.6747 6.4154 1.83E-01 1.24E+01 5.62E+00 6.83E-02 3.10E-02

12.00 304.80 1743.1497 5.4989 1.86E-01 1.26E+01 5.69E+00 6.81E-02 3.09E-02

Results for RBHT Test 1637

Valid Time Period 3722 to 3805 seconds
A-379

Figure A-315 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637C for Time Period 3722 to 3805 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-380

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-D 

Test Conditions

Date: 6/20/2003

Steady-state time window: 4090 – 4172 seconds

Inlet flow rate: 2.540 cm/sec (1.000 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.258 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-381

Figure A-316 Inlet Flow Plot for Experiment 1637D 

Figure A-317 Inlet Temperature Plot for Experiment 1637D 
A-382

Figure A-318 System Pressure Plot for Experiment 1637D 

Figure A-319 Bundle Power Plot for Experiment 1637D 
A-383

Table A-127: Data Results for RBHT Test 1637 for Time Period 4090 to 4172 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.602 22.752 1089.371 0.537 25.712 0.108 5.171 0.000 0.000 22.1 1058.154 4342.1 207900.8639 0.613 0.610 0.616

* 120-133 3048-3378 383 0.643 24.092 1153.524 0.597 28.585 0.193 9.241 -2.478 -118.654 25.78 1234.353 4367.88 209135.2169 0.618 0.615 0.621

* 108-120 2743-3048 382 0.545 28.356 1357.673 0.501 23.988 0.241 11.539 4.444 212.760 23.17 1109.386 4391.05 210244.6025 0.628 0.625 0.631

100-108 2540-2743 381 0.622 15.725 752.936 0.301 14.412 0.177 8.475 0.000 0.000 15.24 729.695 4406.29 210974.2976 0.633 0.630 0.636

97-100 2464-2540 380 0.489 7.961 381.193 0.106 5.075 0.064 3.064 0.000 0.000 7.789 372.939 4414.079 211347.2369 0.5 0.498 0.503

93-97 2362-2464 379 0.522 9.935 475.683 0.135 6.464 0.083 3.974 0.000 0.000 9.711 464.965 4423.79 211812.2021 0.532 0.529 0.535

* 85-93 2159-2362 378 0.400 24.928 1193.558 0.249 11.922 0.160 7.661 7.159 342.774 17.36 831.201 4441.15 212643.4034 0.582 0.579 0.585

81-85 2057-2159 377 0.623 7.837 375.225 0.114 5.458 0.077 3.687 0.000 0.000 7.645 366.045 4448.795 213009.4479 0.632 0.629 0.635

78-81 1981-2057 376 0.521 7.463 357.322 0.081 3.878 0.056 2.681 0.000 0.000 7.321 350.531 4456.116 213359.9793 0.53 0.527 0.533

75-78 1905-1981 375 0.518 7.515 359.808 0.077 3.687 0.055 2.633 0.000 0.000 7.382 353.452 4463.498 213713.4314 0.526 0.523 0.529

72-75 1829-1905 374 0.352 10.091 483.142 0.073 3.495 0.053 2.538 0.000 0.000 9.958 476.792 4473.456 214190.223 0.361 0.359 0.363

* 67-72 1702-1829 373 0.383 16.011 766.613 0.114 5.458 0.086 4.118 1.081 51.760 14.73 705.276 4488.186 214895.4991 0.433 0.431 0.435

63-67 1600-1702 372 0.497 10.444 500.051 0.083 3.974 0.066 3.160 0.000 0.000 10.29 492.688 4498.476 215388.187 0.504 0.501 0.507

60-63 1524-1600 371 0.349 10.148 485.878 0.058 2.777 0.048 2.298 0.000 0.000 10.04 480.718 4508.516 215868.9048 0.356 0.354 0.358

57-60 1448-1524 370 0.339 10.304 493.337 0.054 2.586 0.047 2.250 0.000 0.000 10.2 488.379 4518.716 216357.2834 0.345 0.343 0.347

53-57 1346-1448 369 0.319 14.157 677.842 0.066 3.160 0.061 2.921 0.000 0.000 14.02 671.281 4532.736 217028.5646 0.325 0.323 0.327

* 46-53 1168-1346 368 0.240 27.613 1322.114 0.099 4.740 0.101 4.836 3.113 149.048 24.3 1163.490 4557.036 218192.0548 0.332 0.330 0.334

43-46 1092-1168 367 0.333 10.387 497.316 0.035 1.676 0.041 1.963 0.000 0.000 10.31 493.645 4567.346 218685.7003 0.338 0.336 0.340

37-43 940-1092 366 0.237 23.785 1138.854 0.058 2.777 0.079 3.783 0.000 0.000 23.64 1131.889 4590.986 219817.5896 0.241 0.240 0.242

* 25-37 635-940 365 0.071 57.869 2770.796 0.062 2.969 0.123 5.889 4.624 221.412 53.06 2540.526 4644.046 222358.116 0.148 0.147 0.149

13-25 330-635 364 0.055 58.866 2818.538 0.004 0.192 0.000 0.000 0.000 0.000 58.84 2817.274 4702.886 225175.3903 0.056 0.053 0.059

* 0-13 0-330 363 0.042 64.693 3097.532 0.004 0.192 0.000 0.000 -0.931 -44.562 65.62 3141.902 4768.506 228317.2928 0.028 0.027 0.029

Results for RBHT Test 1637

Valid Time Period 4090 to 4172 seconds

Collapsed Liquid Level = 90.691 inches = 2303.56 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-127 Data Results for RBHT Test 1637

D for Time Period 4090 to 4172 seconds
A-384

Table A-128 Energy Balance Results for RBHT Test 1637D for Time Period 4090 to 4172 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.3316 5.4963 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.25 6.35 1839.1278 5.8017 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.50 12.70 1935.924 6.107 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

0.75 19.05 2032.7202 6.4124 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.00 25.40 2129.5164 6.7177 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.25 31.75 2226.3126 7.0231 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.50 38.10 2323.1088 7.3284 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

1.75 44.45 2419.905 7.6338 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

2.00 50.80 2516.7012 7.9391 0.00E+00 0.00E+00 0.00E+00 8.36E-02 3.79E-02

2.25 57.15 2613.4974 8.2445 2.43E-04 1.64E-02 7.46E-03 8.36E-02 3.79E-02

2.50 63.50 2710.2936 8.5498 3.59E-03 2.42E-01 1.10E-01 8.33E-02 3.78E-02

2.75 69.85 2807.0898 8.8552 7.05E-03 4.77E-01 2.16E-01 8.31E-02 3.77E-02

3.00 76.20 2903.886 9.1605 1.06E-02 7.19E-01 3.26E-01 8.28E-02 3.75E-02

3.25 82.55 3000.6822 9.4659 1.44E-02 9.70E-01 4.40E-01 8.24E-02 3.74E-02

3.50 88.90 3097.4784 9.7712 1.82E-02 1.23E+00 5.57E-01 8.21E-02 3.73E-02

3.75 95.25 3194.2746 10.077 2.21E-02 1.50E+00 6.79E-01 8.18E-02 3.71E-02

4.00 101.60 3291.0708 10.382 2.62E-02 1.77E+00 8.03E-01 8.15E-02 3.69E-02

4.25 107.95 3387.867 10.687 3.04E-02 2.05E+00 9.32E-01 8.11E-02 3.68E-02

4.50 114.30 3484.6632 10.993 3.47E-02 2.35E+00 1.06E+00 8.07E-02 3.66E-02

4.75 120.65 3581.4594 11.298 3.92E-02 2.65E+00 1.20E+00 8.04E-02 3.65E-02

5.00 127.00 3678.2556 11.603 4.37E-02 2.95E+00 1.34E+00 8.00E-02 3.63E-02

5.25 133.35 3775.0518 11.909 4.84E-02 3.27E+00 1.48E+00 7.96E-02 3.61E-02

5.50 139.70 3871.848 12.214 5.32E-02 3.60E+00 1.63E+00 7.92E-02 3.59E-02

5.75 146.05 3968.6442 12.519 5.81E-02 3.93E+00 1.78E+00 7.88E-02 3.57E-02

6.00 152.40 4065.4404 12.825 6.32E-02 4.27E+00 1.94E+00 7.84E-02 3.55E-02

6.25 158.75 4162.2366 13.13 6.83E-02 4.62E+00 2.10E+00 7.79E-02 3.53E-02

6.50 165.10 4259.0328 13.435 7.36E-02 4.98E+00 2.26E+00 7.75E-02 3.51E-02

6.75 171.45 4355.829 13.741 7.90E-02 5.34E+00 2.42E+00 7.70E-02 3.49E-02

7.00 177.80 4452.6252 14.046 8.46E-02 5.72E+00 2.59E+00 7.66E-02 3.47E-02

7.25 184.15 4549.4214 14.351 9.02E-02 6.10E+00 2.77E+00 7.61E-02 3.45E-02

7.50 190.50 4646.2176 14.657 9.60E-02 6.49E+00 2.94E+00 7.56E-02 3.43E-02

7.75 196.85 4743.0138 14.962 1.02E-01 6.89E+00 3.12E+00 7.51E-02 3.41E-02

8.00 203.20 4839.81 15.268 1.08E-01 7.29E+00 3.31E+00 7.46E-02 3.38E-02

8.25 209.55 4936.6062 15.573 1.14E-01 7.71E+00 3.50E+00 7.41E-02 3.36E-02

8.50 215.90 5033.4024 15.878 1.20E-01 8.13E+00 3.69E+00 7.36E-02 3.34E-02

8.75 222.25 5130.1986 16.184 1.27E-01 8.56E+00 3.88E+00 7.30E-02 3.31E-02

9.00 228.60 5226.9948 16.489 1.33E-01 9.00E+00 4.08E+00 7.25E-02 3.29E-02

9.25 234.95 4936.6062 15.573 1.40E-01 9.44E+00 4.28E+00 7.20E-02 3.26E-02

9.50 241.30 4646.2176 14.657 1.46E-01 9.84E+00 4.46E+00 7.15E-02 3.24E-02

9.75 247.65 4355.829 13.741 1.51E-01 1.02E+01 4.64E+00 7.10E-02 3.22E-02

10.00 254.00 4065.4404 12.825 1.57E-01 1.06E+01 4.80E+00 7.05E-02 3.20E-02

10.25 260.35 3775.0518 11.909 1.62E-01 1.09E+01 4.95E+00 7.01E-02 3.18E-02

10.50 266.70 3484.6632 10.993 1.66E-01 1.12E+01 5.09E+00 6.98E-02 3.16E-02

10.75 273.05 3194.2746 10.077 1.70E-01 1.15E+01 5.22E+00 6.94E-02 3.15E-02

11.00 279.40 2903.886 9.1605 1.74E-01 1.18E+01 5.34E+00 6.91E-02 3.13E-02

11.25 285.75 2613.4974 8.2445 1.78E-01 1.20E+01 5.44E+00 6.88E-02 3.12E-02

11.50 292.10 2323.1088 7.3284 1.81E-01 1.22E+01 5.54E+00 6.85E-02 3.11E-02

11.75 298.45 2032.7202 6.4124 1.83E-01 1.24E+01 5.62E+00 6.83E-02 3.10E-02

12.00 304.80 1742.3316 5.4963 1.86E-01 1.26E+01 5.69E+00 6.81E-02 3.09E-02

Results for RBHT Test 1637

Valid Time Period 4090 to 4172 seconds
A-385

Figure A-320 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637D for Time Period 4090 to 4172 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-386

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-E 

Test Conditions

Date: 6/20/2003

Steady-state time window: 4667 – 4838 seconds

Inlet flow rate: 1.778 cm/sec (0.700 in./sec) 

Inlet mass flow rate: 0.082 kg/sec (0.180 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-387

Figure A-321 Inlet Flow Plot for Experiment 1637E 

Figure A-322 Inlet Temperature Plot for Experiment 1637E 
A-388

Figure A-323 System Pressure Plot for Experiment 1637E 

Figure A-324 Bundle Power Plot for Experiment 1637E 
A-389

Table A-129: Data Results for RBHT Test 1637 for Time Period 4667 to 4838 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.638 20.701 991.151 0.370 17.716 0.076 3.639 0.000 0.000 20.25 969.575 4340.25 207812.2854 0.646 0.643 0.649

* 120-133 3048-3378 383 0.664 22.658 1084.895 0.412 19.727 0.135 6.464 -1.539 -73.664 23.65 1132.368 4363.9 208944.6535 0.65 0.647 0.653

* 108-120 2743-3048 382 0.564 27.146 1299.735 0.346 16.567 0.169 8.092 5.311 254.270 21.32 1020.807 4385.22 209965.4606 0.658 0.655 0.661

100-108 2540-2743 381 0.654 14.380 688.534 0.208 9.959 0.124 5.937 0.000 0.000 14.04 672.239 4399.26 210637.6994 0.662 0.659 0.665

97-100 2464-2540 380 0.507 7.681 367.765 0.073 3.495 0.045 2.155 0.000 0.000 7.561 362.023 4406.821 210999.722 0.515 0.512 0.518

93-97 2362-2464 379 0.542 9.525 456.039 0.093 4.453 0.058 2.777 0.000 0.000 9.369 448.590 4416.19 211448.3122 0.549 0.546 0.552

* 85-93 2159-2362 378 0.413 24.403 1168.444 0.173 8.283 0.112 5.363 7.558 361.901 16.56 792.897 4432.75 212241.2092 0.601 0.598 0.604

81-85 2057-2159 377 0.647 7.328 350.856 0.080 3.830 0.054 2.586 0.000 0.000 7.194 344.451 4439.944 212585.6598 0.654 0.651 0.65778-81 1981-2057 376 0.557 6.907 330.715 0.057 2.729 0.039 1.867 0.000 0.000 6.81 326.065 4446.754 212911.7243 0.563 0.560 0.56675-78 1905-1981 375 0.542 7.130 341.407 0.054 2.586 0.038 1.819 0.000 0.000 7.036 336.885 4453.79 213248.6098 0.548 0.545 0.55172-75 1829-1905 374 0.401 9.338 447.087 0.052 2.490 0.037 1.772 0.000 0.000 9.244 442.605 4463.034 213691.2149 0.407 0.405 0.409

* 67-72 1702-1829 373 0.385 15.964 764.375 0.081 3.878 0.060 2.873 2.323 111.240 13.5 646.383 4476.534 214337.5984 0.48 0.478 0.482

63-67 1600-1702 372 0.548 9.390 449.574 0.060 2.873 0.047 2.250 0.000 0.000 9.278 444.233 4485.812 214781.8314 0.553 0.550 0.55660-63 1524-1600 371 0.373 9.763 467.477 0.042 2.011 0.034 1.628 0.000 0.000 9.682 463.577 4495.494 215245.4081 0.378 0.376 0.38057-60 1448-1524 370 0.365 9.893 473.693 0.040 1.915 0.033 1.580 0.000 0.000 9.819 470.136 4505.313 215715.5443 0.37 0.368 0.37253-57 1346-1448 369 0.347 13.565 649.495 0.049 2.346 0.043 2.059 0.000 0.000 13.47 644.947 4518.783 216360.4914 0.352 0.350 0.354

* 46-53 1168-1346 368 0.279 26.216 1255.225 0.075 3.591 0.071 3.399 4.090 195.827 21.98 1052.408 4540.763 217412.8994 0.395 0.393 0.397

43-46 1092-1168 367 0.435 8.798 421.227 0.028 1.341 0.029 1.389 0.000 0.000 8.738 418.378 4549.501 217831.2771 0.439 0.437 0.44137-43 940-1092 366 0.302 21.750 1041.380 0.048 2.298 0.055 2.633 0.000 0.000 21.64 1036.129 4571.141 218867.4059 0.305 0.303 0.307

* 25-37 635-940 365 0.162 52.240 2501.251 0.065 3.112 0.100 4.788 1.155 55.288 50.92 2438.063 4622.061 221305.4685 0.183 0.182 0.184

13-25 330-635 364 0.059 58.643 2807.846 0.025 1.197 0.040 1.915 0.000 0.000 58.56 2803.868 4680.621 224109.3364 0.06 0.057 0.063

* 0-13 0-330 363 0.043 64.610 3093.554 0.002 0.096 0.000 0.000 -0.852 -40.784 65.46 3134.242 4746.081 227243.578 0.03 0.029 0.032

Results for RBHT Test 1637

Valid Time Period 4667 to 4838 seconds

Collapsed Liquid Level = 86.247 inches = 2190.66 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-129 Data Results for RBHT Test 1637

E for Time Period 4667 to 4838 seconds
A-390

Table A-130 Energy Balance Results for RBHT Test 1637E for Time Period 4667 to 4838 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.2308 5.496 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.25 6.35 1839.0214 5.8013 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.50 12.70 1935.812 6.1067 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

0.75 19.05 2032.6026 6.412 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.00 25.40 2129.3932 6.7173 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.25 31.75 2226.1838 7.0227 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.50 38.10 2322.9744 7.328 0.00E+00 0.00E+00 0.00E+00 5.85E-02 2.65E-02

1.75 44.45 2419.765 7.6333 2.02E-03 9.54E-02 4.33E-02 5.84E-02 2.65E-02

2.00 50.80 2516.5556 7.9387 6.45E-03 3.05E-01 1.38E-01 5.81E-02 2.64E-02

2.25 57.15 2613.3462 8.244 1.11E-02 5.23E-01 2.37E-01 5.79E-02 2.63E-02

2.50 63.50 2710.1368 8.5493 1.58E-02 7.48E-01 3.39E-01 5.76E-02 2.61E-02

2.75 69.85 2806.9274 8.8547 2.08E-02 9.83E-01 4.46E-01 5.73E-02 2.60E-02

3.00 76.20 2903.718 9.16 2.59E-02 1.22E+00 5.56E-01 5.70E-02 2.59E-02

3.25 82.55 3000.5086 9.4653 3.12E-02 1.48E+00 6.69E-01 5.67E-02 2.57E-02

3.50 88.90 3097.2992 9.7707 3.67E-02 1.73E+00 7.87E-01 5.64E-02 2.56E-02

3.75 95.25 3194.0898 10.076 4.23E-02 2.00E+00 9.08E-01 5.60E-02 2.54E-02

4.00 101.60 3290.8804 10.381 4.82E-02 2.28E+00 1.03E+00 5.57E-02 2.53E-02

4.25 107.95 3387.671 10.687 5.42E-02 2.56E+00 1.16E+00 5.54E-02 2.51E-02

4.50 114.30 3484.4616 10.992 6.03E-02 2.85E+00 1.29E+00 5.50E-02 2.49E-02

4.75 120.65 3581.2522 11.297 6.67E-02 3.15E+00 1.43E+00 5.46E-02 2.48E-02

5.00 127.00 3678.0428 11.603 7.32E-02 3.46E+00 1.57E+00 5.42E-02 2.46E-02

5.25 133.35 3774.8334 11.908 7.99E-02 3.78E+00 1.71E+00 5.38E-02 2.44E-02

5.50 139.70 3871.624 12.213 8.67E-02 4.10E+00 1.86E+00 5.34E-02 2.42E-02

5.75 146.05 3968.4146 12.519 9.38E-02 4.43E+00 2.01E+00 5.30E-02 2.41E-02

6.00 152.40 4065.2052 12.824 1.01E-01 4.77E+00 2.17E+00 5.26E-02 2.39E-02

6.25 158.75 4161.9958 13.129 1.08E-01 5.12E+00 2.32E+00 5.22E-02 2.37E-02

6.50 165.10 4258.7864 13.435 1.16E-01 5.48E+00 2.49E+00 5.17E-02 2.35E-02

6.75 171.45 4355.577 13.74 1.24E-01 5.85E+00 2.65E+00 5.13E-02 2.33E-02

7.00 177.80 4452.3676 14.045 1.32E-01 6.22E+00 2.82E+00 5.08E-02 2.31E-02

7.25 184.15 4549.1582 14.351 1.40E-01 6.60E+00 3.00E+00 5.03E-02 2.28E-02

7.50 190.50 4645.9488 14.656 1.48E-01 6.99E+00 3.17E+00 4.99E-02 2.26E-02

7.75 196.85 4742.7394 14.961 1.56E-01 7.39E+00 3.35E+00 4.94E-02 2.24E-02

8.00 203.20 4839.53 15.267 1.65E-01 7.80E+00 3.54E+00 4.89E-02 2.22E-02

8.25 209.55 4936.3206 15.572 1.74E-01 8.21E+00 3.72E+00 4.84E-02 2.19E-02

8.50 215.90 5033.1112 15.877 1.83E-01 8.64E+00 3.92E+00 4.78E-02 2.17E-02

8.75 222.25 5129.9018 16.183 1.92E-01 9.07E+00 4.11E+00 4.73E-02 2.15E-02

9.00 228.60 5226.6924 16.488 2.01E-01 9.51E+00 4.31E+00 4.68E-02 2.12E-02

9.25 234.95 4936.3206 15.572 2.10E-01 9.94E+00 4.51E+00 4.62E-02 2.10E-02

9.50 241.30 4645.9488 14.656 2.19E-01 1.03E+01 4.69E+00 4.57E-02 2.07E-02

9.75 247.65 4355.577 13.74 2.27E-01 1.07E+01 4.87E+00 4.52E-02 2.05E-02

10.00 254.00 4065.2052 12.824 2.35E-01 1.11E+01 5.03E+00 4.48E-02 2.03E-02

10.25 260.35 3774.8334 11.908 2.42E-01 1.14E+01 5.18E+00 4.44E-02 2.01E-02

10.50 266.70 3484.4616 10.992 2.48E-01 1.17E+01 5.32E+00 4.40E-02 2.00E-02

10.75 273.05 3194.0898 10.076 2.54E-01 1.20E+01 5.45E+00 4.37E-02 1.98E-02

11.00 279.40 2903.718 9.16 2.60E-01 1.23E+01 5.56E+00 4.33E-02 1.97E-02

11.25 285.75 2613.3462 8.244 2.64E-01 1.25E+01 5.67E+00 4.31E-02 1.95E-02

11.50 292.10 2322.9744 7.328 2.69E-01 1.27E+01 5.77E+00 4.28E-02 1.94E-02

11.75 298.45 2032.6026 6.412 2.73E-01 1.29E+01 5.85E+00 4.26E-02 1.93E-02

12.00 304.80 1742.2308 5.496 2.76E-01 1.31E+01 5.92E+00 4.24E-02 1.92E-02

Results for RBHT Test 1637

Valid Time Period 4667 to 4838 seconds
A-391

Figure A-325 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637E for Time Period 4667 to 4838 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-392

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-F 

Test Conditions

Date: 6/20/2003

Steady-state time window: 5096 – 5300 seconds

Inlet flow rate: 1.265 cm/sec (0.498 in./sec) 

Inlet mass flow rate: 0.058 kg/sec (0.128 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-393

Figure A-326 Inlet Flow Plot for Experiment 1637F 

Figure A-327 Inlet Temperature Plot for Experiment 1637F 
A-394

Figure A-328 System Pressure Plot for Experiment 1637F 

Figure A-329 Bundle Power Plot for Experiment 1637F 
A-395

Table A-131: Data Results for RBHT Test 1637 for Time Period 5096 to 5300 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.668 18.976 908.596 0.260 12.449 0.054 2.586 0.000 0.000 18.65 892.967 4338.65 207735.677 0.673 0.670 0.676

* 120-133 3048-3378 383 0.681 21.563 1032.428 0.289 13.837 0.096 4.597 -0.802 -38.414 21.98 1052.408 4360.63 208788.0851 0.674 0.671 0.677

* 108-120 2743-3048 382 0.580 26.164 1252.739 0.242 11.587 0.120 5.746 5.632 269.661 20.17 965.745 4380.8 209753.8299 0.676 0.673 0.679

100-108 2540-2743 381 0.672 13.643 653.225 0.146 6.991 0.088 4.213 0.000 0.000 13.4 641.595 4394.2 210395.4253 0.677 0.674 0.680

97-100 2464-2540 380 0.521 7.463 357.322 0.051 2.442 0.032 1.532 0.000 0.000 7.375 353.117 4401.575 210748.5422 0.527 0.524 0.530

93-97 2362-2464 379 0.551 9.327 446.590 0.065 3.112 0.042 2.011 0.000 0.000 9.218 441.360 4410.793 211189.9024 0.556 0.553 0.559

* 85-93 2159-2362 378 0.422 24.030 1150.540 0.121 5.794 0.080 3.830 7.679 367.650 16.15 773.266 4426.943 211963.1686 0.611 0.608 0.614

81-85 2057-2159 377 0.662 7.032 336.683 0.056 2.681 0.038 1.819 0.000 0.000 6.934 332.002 4433.877 212295.1703 0.666 0.663 0.66978-81 1981-2057 376 0.610 6.081 291.178 0.040 1.915 0.028 1.341 0.000 0.000 6.011 287.808 4439.888 212582.9785 0.614 0.611 0.61775-78 1905-1981 375 0.522 7.447 356.576 0.038 1.819 0.027 1.293 0.000 0.000 7.378 353.261 4447.266 212936.239 0.526 0.523 0.52972-75 1829-1905 374 0.427 8.922 427.194 0.036 1.724 0.027 1.293 0.000 0.000 8.858 424.123 4456.124 213360.3623 0.431 0.429 0.433

* 67-72 1702-1829 373 0.389 15.860 759.401 0.057 2.729 0.043 2.059 2.970 142.225 12.79 612.388 4468.914 213972.7508 0.507 0.504 0.510

63-67 1600-1702 372 0.580 8.735 418.243 0.042 2.011 0.033 1.580 0.000 0.000 8.658 414.547 4477.572 214387.2981 0.583 0.580 0.58660-63 1524-1600 371 0.391 9.493 454.547 0.030 1.436 0.024 1.149 0.000 0.000 9.437 451.846 4487.009 214839.1441 0.394 0.392 0.39657-60 1448-1524 370 0.384 9.597 459.520 0.028 1.341 0.024 1.149 0.000 0.000 9.545 457.017 4496.554 215296.1611 0.387 0.385 0.38953-57 1346-1448 369 0.366 13.181 631.094 0.035 1.676 0.030 1.436 0.000 0.000 13.11 627.710 4509.664 215923.8713 0.369 0.367 0.371

* 46-53 1168-1346 368 0.289 25.858 1238.068 0.055 2.633 0.050 2.394 4.763 228.034 20.99 1005.007 4530.654 216928.8779 0.423 0.421 0.425

43-46 1092-1168 367 0.474 8.200 392.631 0.021 1.005 0.021 1.005 0.000 0.000 8.156 390.511 4538.81 217319.3893 0.476 0.474 0.47837-43 940-1092 366 0.337 20.649 988.664 0.037 1.772 0.039 1.867 0.000 0.000 20.57 984.897 4559.38 218304.2862 0.34 0.338 0.342

* 25-37 635-940 365 0.202 49.757 2382.392 0.054 2.586 0.071 3.399 1.442 69.057 48.19 2307.350 4607.57 220611.6357 0.227 0.226 0.228

13-25 330-635 364 0.112 55.340 2649.699 0.025 1.197 0.054 2.586 0.000 0.000 55.24 2644.905 4662.81 223256.5411 0.113 0.112 0.114

* 0-13 0-330 363 0.044 64.548 3090.570 0.001 0.048 0.000 0.000 0.877 41.986 63.67 3048.536 4726.48 226305.0771 0.057 0.054 0.060

Results for RBHT Test 1637

Valid Time Period 5096 to 5300 seconds

Collapsed Liquid Level = 83.201 inches = 2113.30 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-131 Data Results for RBHT Test 1637

F for Time Period 5096 to 5300 seconds
A-396

Table A-132 Energy Balance Results for RBHT Test 1637F for Time Period 5096 to 5300 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1744.4411 5.503 0.00E+00 0.00E+00 0.00E+00 4.16E-02 1.89E-02

0.25 6.35 1841.3545 5.8087 0.00E+00 0.00E+00 0.00E+00 4.16E-02 1.89E-02

0.50 12.70 1938.2679 6.1144 0.00E+00 0.00E+00 0.00E+00 4.16E-02 1.89E-02

0.75 19.05 2035.1813 6.4201 0.00E+00 0.00E+00 0.00E+00 4.16E-02 1.89E-02

1.00 25.40 2132.0947 6.7258 0.00E+00 0.00E+00 0.00E+00 4.16E-02 1.89E-02

1.25 31.75 2229.0081 7.0316 9.11E-04 3.07E-02 1.39E-02 4.16E-02 1.89E-02

1.50 38.10 2325.9215 7.3373 6.66E-03 2.24E-01 1.02E-01 4.14E-02 1.88E-02

1.75 44.45 2422.8349 7.643 1.27E-02 4.26E-01 1.93E-01 4.11E-02 1.87E-02

2.00 50.80 2519.7483 7.9487 1.89E-02 6.35E-01 2.88E-01 4.09E-02 1.85E-02

2.25 57.15 2616.6617 8.2544 2.54E-02 8.54E-01 3.87E-01 4.06E-02 1.84E-02

2.50 63.50 2713.5751 8.5602 3.21E-02 1.08E+00 4.90E-01 4.03E-02 1.83E-02

2.75 69.85 2810.4885 8.8659 3.91E-02 1.31E+00 5.96E-01 4.00E-02 1.82E-02

3.00 76.20 2907.4019 9.1716 4.63E-02 1.56E+00 7.06E-01 3.97E-02 1.80E-02

3.25 82.55 3004.3153 9.4773 5.37E-02 1.81E+00 8.20E-01 3.94E-02 1.79E-02

3.50 88.90 3101.2287 9.783 6.14E-02 2.07E+00 9.38E-01 3.91E-02 1.77E-02

3.75 95.25 3198.1421 10.089 6.94E-02 2.34E+00 1.06E+00 3.88E-02 1.76E-02

4.00 101.60 3295.0555 10.394 7.76E-02 2.61E+00 1.18E+00 3.84E-02 1.74E-02

4.25 107.95 3391.9689 10.7 8.60E-02 2.89E+00 1.31E+00 3.81E-02 1.73E-02

4.50 114.30 3488.8823 11.006 9.47E-02 3.19E+00 1.45E+00 3.77E-02 1.71E-02

4.75 120.65 3585.7957 11.312 1.04E-01 3.49E+00 1.58E+00 3.73E-02 1.69E-02

5.00 127.00 3682.7091 11.617 1.13E-01 3.80E+00 1.72E+00 3.69E-02 1.68E-02

5.25 133.35 3779.6225 11.923 1.22E-01 4.11E+00 1.87E+00 3.66E-02 1.66E-02

5.50 139.70 3876.5359 12.229 1.32E-01 4.44E+00 2.01E+00 3.62E-02 1.64E-02

5.75 146.05 3973.4493 12.535 1.42E-01 4.77E+00 2.16E+00 3.57E-02 1.62E-02

6.00 152.40 4070.3627 12.84 1.52E-01 5.11E+00 2.32E+00 3.53E-02 1.60E-02

6.25 158.75 4167.2761 13.146 1.62E-01 5.46E+00 2.48E+00 3.49E-02 1.58E-02

6.50 165.10 4264.1895 13.452 1.73E-01 5.82E+00 2.64E+00 3.44E-02 1.56E-02

6.75 171.45 4361.1029 13.757 1.84E-01 6.19E+00 2.81E+00 3.40E-02 1.54E-02

7.00 177.80 4458.0163 14.063 1.95E-01 6.56E+00 2.98E+00 3.35E-02 1.52E-02

7.25 184.15 4554.9296 14.369 2.06E-01 6.94E+00 3.15E+00 3.31E-02 1.50E-02

7.50 190.50 4651.843 14.675 2.18E-01 7.33E+00 3.33E+00 3.26E-02 1.48E-02

7.75 196.85 4748.7564 14.98 2.30E-01 7.73E+00 3.51E+00 3.21E-02 1.45E-02

8.00 203.20 4845.6698 15.286 2.42E-01 8.14E+00 3.69E+00 3.16E-02 1.43E-02

8.25 209.55 4942.5832 15.592 2.54E-01 8.56E+00 3.88E+00 3.11E-02 1.41E-02

8.50 215.90 5039.4966 15.897 2.67E-01 8.98E+00 4.07E+00 3.05E-02 1.38E-02

8.75 222.25 5136.41 16.203 2.80E-01 9.41E+00 4.27E+00 3.00E-02 1.36E-02

9.00 228.60 5233.3234 16.509 2.93E-01 9.86E+00 4.47E+00 2.95E-02 1.34E-02

9.25 234.95 4942.5832 15.592 3.06E-01 1.03E+01 4.67E+00 2.89E-02 1.31E-02

9.50 241.30 4651.843 14.675 3.18E-01 1.07E+01 4.85E+00 2.84E-02 1.29E-02

9.75 247.65 4361.1029 13.757 3.29E-01 1.11E+01 5.02E+00 2.79E-02 1.27E-02

10.00 254.00 4070.3627 12.84 3.40E-01 1.14E+01 5.19E+00 2.75E-02 1.25E-02

10.25 260.35 3779.6225 11.923 3.50E-01 1.18E+01 5.34E+00 2.71E-02 1.23E-02

10.50 266.70 3488.8823 11.006 3.59E-01 1.21E+01 5.48E+00 2.67E-02 1.21E-02

10.75 273.05 3198.1421 10.089 3.67E-01 1.24E+01 5.61E+00 2.64E-02 1.20E-02

11.00 279.40 2907.4019 9.1716 3.75E-01 1.26E+01 5.72E+00 2.60E-02 1.18E-02

11.25 285.75 2616.6617 8.2544 3.82E-01 1.29E+01 5.83E+00 2.57E-02 1.17E-02

11.50 292.10 2325.9215 7.3373 3.88E-01 1.31E+01 5.93E+00 2.55E-02 1.16E-02

11.75 298.45 2035.1813 6.4201 3.94E-01 1.32E+01 6.01E+00 2.53E-02 1.15E-02

12.00 304.80 1744.4411 5.503 3.98E-01 1.34E+01 6.08E+00 2.51E-02 1.14E-02

Results for RBHT Test 1637

Valid Time Period 5096 to 5300 seconds
A-397

Figure A-330 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637F for Time Period 5096 to 5300 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-398

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-G 

Test Conditions

Date: 6/20/2003

Steady-state time window: 5576 – 5705 seconds

Inlet flow rate: 1.257 cm/sec (0.495 in./sec) 

Inlet mass flow rate: 0.058 kg/sec (0.127 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-399

Figure A-331 Inlet Flow Plot for Experiment 1637G 

Figure A-332 Inlet Temperature Plot for Experiment 1637G 
A-400

Figure A-333 System Pressure Plot for Experiment 1637G 

Figure A-334 Bundle Power Plot for Experiment 1637G 
A-401

Table A-133: Data Results for RBHT Test 1637 for Time Period 5576 to 5705 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.668 18.987 909.094 0.258 12.353 0.054 2.586 0.000 0.000 18.67 893.924 4338.67 207736.6346 0.673 0.670 0.676

* 120-133 3048-3378 383 0.680 21.620 1035.163 0.287 13.742 0.096 4.597 -0.733 -35.104 21.97 1051.929 4360.64 208788.5639 0.674 0.671 0.677

* 108-120 2743-3048 382 0.578 26.289 1258.707 0.240 11.491 0.119 5.698 5.810 278.167 20.12 963.351 4380.76 209751.9147 0.677 0.674 0.680

100-108 2540-2743 381 0.673 13.596 650.987 0.144 6.895 0.087 4.166 0.000 0.000 13.36 639.680 4394.12 210391.5949 0.678 0.675 0.681

97-100 2464-2540 380 0.520 7.473 357.819 0.051 2.442 0.032 1.532 0.000 0.000 7.388 353.739 4401.508 210745.3342 0.526 0.523 0.529

93-97 2362-2464 379 0.555 9.239 442.363 0.065 3.112 0.041 1.963 0.000 0.000 9.128 437.051 4410.636 211182.3852 0.561 0.558 0.564

* 85-93 2159-2362 378 0.421 24.050 1151.535 0.120 5.746 0.079 3.783 7.801 373.529 16.05 768.478 4426.686 211950.8633 0.614 0.611 0.617

81-85 2057-2159 377 0.662 7.021 336.186 0.055 2.633 0.038 1.819 0.000 0.000 6.926 331.619 4433.612 212282.482 0.667 0.664 0.67078-81 1981-2057 376 0.608 6.113 292.670 0.040 1.915 0.028 1.341 0.000 0.000 6.042 289.293 4439.654 212571.7745 0.612 0.609 0.61575-78 1905-1981 375 0.525 7.400 354.338 0.038 1.819 0.027 1.293 0.000 0.000 7.332 351.058 4446.986 212922.8326 0.529 0.526 0.53272-75 1829-1905 374 0.432 8.849 423.713 0.036 1.724 0.026 1.245 0.000 0.000 8.782 420.484 4455.768 213343.317 0.436 0.434 0.438

* 67-72 1702-1829 373 0.386 15.949 763.629 0.057 2.729 0.043 2.059 3.149 150.761 12.7 608.079 4468.468 213951.3962 0.511 0.508 0.514

63-67 1600-1702 372 0.582 8.694 416.253 0.042 2.011 0.033 1.580 0.000 0.000 8.613 412.393 4477.081 214363.7889 0.585 0.582 0.58860-63 1524-1600 371 0.395 9.426 451.314 0.030 1.436 0.024 1.149 0.000 0.000 9.367 448.494 4486.448 214812.2833 0.399 0.397 0.40157-60 1448-1524 370 0.382 9.634 461.261 0.028 1.341 0.023 1.101 0.000 0.000 9.579 458.645 4496.027 215270.9282 0.385 0.383 0.38753-57 1346-1448 369 0.371 13.072 625.872 0.035 1.676 0.030 1.436 0.000 0.000 13 622.443 4509.027 215893.3716 0.374 0.372 0.376

* 46-53 1168-1346 368 0.282 26.117 1250.501 0.054 2.586 0.050 2.394 5.253 251.527 20.76 993.994 4529.787 216887.3657 0.429 0.427 0.431

43-46 1092-1168 367 0.481 8.091 387.409 0.021 1.005 0.020 0.958 0.000 0.000 8.046 385.245 4537.833 217272.6103 0.483 0.481 0.48537-43 940-1092 366 0.336 20.685 990.405 0.036 1.724 0.039 1.867 0.000 0.000 20.6 986.333 4558.433 218258.9436 0.339 0.337 0.341

* 25-37 635-940 365 0.205 49.518 2370.954 0.053 2.538 0.070 3.352 1.105 52.927 48.29 2312.138 4606.723 220571.0812 0.225 0.224 0.226

13-25 330-635 364 0.110 55.475 2656.164 0.025 1.197 0.054 2.586 0.000 0.000 55.38 2651.609 4662.103 223222.6898 0.111 0.110 0.112

* 0-13 0-330 363 0.044 64.548 3090.570 0.001 0.048 0.000 0.000 0.807 38.635 63.74 3051.888 4725.843 226274.5774 0.056 0.053 0.059

Results for RBHT Test 1637

Valid Time Period 5576 to 5705 seconds

Collapsed Liquid Level = 83.077 inches = 2110.17 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-133 Data Results for RBHT Test 1637

G for Time Period 5576 to 5705 seconds
A-402

Table A-134 Energy Balance Results for RBHT Test 1637G for Time Period 5576 to 5705 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.8004 5.5009 0.00E+00 0.00E+00 0.00E+00 4.14E-02 1.88E-02

0.25 6.35 1840.6782 5.8066 0.00E+00 0.00E+00 0.00E+00 4.14E-02 1.88E-02

0.50 12.70 1937.556 6.1122 0.00E+00 0.00E+00 0.00E+00 4.14E-02 1.88E-02

0.75 19.05 2034.4338 6.4178 0.00E+00 0.00E+00 0.00E+00 4.14E-02 1.88E-02

1.00 25.40 2131.3116 6.7234 0.00E+00 0.00E+00 0.00E+00 4.14E-02 1.88E-02

1.25 31.75 2228.1894 7.029 1.10E-03 3.67E-02 1.67E-02 4.13E-02 1.87E-02

1.50 38.10 2325.0672 7.3346 6.88E-03 2.30E-01 1.04E-01 4.11E-02 1.86E-02

1.75 44.45 2421.945 7.6402 1.29E-02 4.31E-01 1.96E-01 4.08E-02 1.85E-02

2.00 50.80 2518.8228 7.9458 1.92E-02 6.41E-01 2.91E-01 4.06E-02 1.84E-02

2.25 57.15 2615.7006 8.2514 2.57E-02 8.59E-01 3.90E-01 4.03E-02 1.83E-02

2.50 63.50 2712.5784 8.557 3.25E-02 1.09E+00 4.92E-01 4.00E-02 1.81E-02

2.75 69.85 2809.4562 8.8626 3.95E-02 1.32E+00 5.98E-01 3.97E-02 1.80E-02

3.00 76.20 2906.334 9.1682 4.68E-02 1.56E+00 7.08E-01 3.94E-02 1.79E-02

3.25 82.55 3003.2118 9.4738 5.43E-02 1.81E+00 8.22E-01 3.91E-02 1.77E-02

3.50 88.90 3100.0896 9.7795 6.20E-02 2.07E+00 9.40E-01 3.88E-02 1.76E-02

3.75 95.25 3196.9674 10.085 7.00E-02 2.34E+00 1.06E+00 3.85E-02 1.74E-02

4.00 101.60 3293.8452 10.391 7.83E-02 2.61E+00 1.19E+00 3.81E-02 1.73E-02

4.25 107.95 3390.723 10.696 8.68E-02 2.90E+00 1.31E+00 3.78E-02 1.71E-02

4.50 114.30 3487.6008 11.002 9.55E-02 3.19E+00 1.45E+00 3.74E-02 1.70E-02

4.75 120.65 3584.4786 11.307 1.05E-01 3.49E+00 1.58E+00 3.70E-02 1.68E-02

5.00 127.00 3681.3564 11.613 1.14E-01 3.80E+00 1.72E+00 3.67E-02 1.66E-02

5.25 133.35 3778.2342 11.919 1.23E-01 4.12E+00 1.87E+00 3.63E-02 1.64E-02

5.50 139.70 3875.112 12.224 1.33E-01 4.44E+00 2.01E+00 3.59E-02 1.63E-02

5.75 146.05 3971.9897 12.53 1.43E-01 4.77E+00 2.17E+00 3.54E-02 1.61E-02

6.00 152.40 4068.8675 12.836 1.53E-01 5.11E+00 2.32E+00 3.50E-02 1.59E-02

6.25 158.75 4165.7453 13.141 1.64E-01 5.46E+00 2.48E+00 3.46E-02 1.57E-02

6.50 165.10 4262.6231 13.447 1.74E-01 5.82E+00 2.64E+00 3.41E-02 1.55E-02

6.75 171.45 4359.5009 13.752 1.85E-01 6.19E+00 2.81E+00 3.37E-02 1.53E-02

7.00 177.80 4456.3787 14.058 1.96E-01 6.56E+00 2.98E+00 3.32E-02 1.51E-02

7.25 184.15 4553.2565 14.364 2.08E-01 6.94E+00 3.15E+00 3.28E-02 1.49E-02

7.50 190.50 4650.1343 14.669 2.20E-01 7.34E+00 3.33E+00 3.23E-02 1.46E-02

7.75 196.85 4747.0121 14.975 2.32E-01 7.73E+00 3.51E+00 3.18E-02 1.44E-02

8.00 203.20 4843.8899 15.28 2.44E-01 8.14E+00 3.69E+00 3.13E-02 1.42E-02

8.25 209.55 4940.7677 15.586 2.56E-01 8.55E+00 3.88E+00 3.08E-02 1.40E-02

8.50 215.90 5037.6455 15.892 2.69E-01 8.98E+00 4.07E+00 3.02E-02 1.37E-02

8.75 222.25 5134.5233 16.197 2.82E-01 9.41E+00 4.27E+00 2.97E-02 1.35E-02

9.00 228.60 5231.4011 16.503 2.95E-01 9.85E+00 4.47E+00 2.92E-02 1.32E-02

9.25 234.95 4940.7677 15.586 3.08E-01 1.03E+01 4.66E+00 2.86E-02 1.30E-02

9.50 241.30 4650.1343 14.669 3.20E-01 1.07E+01 4.85E+00 2.81E-02 1.28E-02

9.75 247.65 4359.5009 13.752 3.32E-01 1.11E+01 5.02E+00 2.76E-02 1.25E-02

10.00 254.00 4068.8675 12.836 3.42E-01 1.14E+01 5.18E+00 2.72E-02 1.23E-02

10.25 260.35 3778.2342 11.919 3.52E-01 1.18E+01 5.33E+00 2.68E-02 1.22E-02

10.50 266.70 3487.6008 11.002 3.61E-01 1.21E+01 5.48E+00 2.64E-02 1.20E-02

10.75 273.05 3196.9674 10.085 3.70E-01 1.24E+01 5.60E+00 2.61E-02 1.18E-02

11.00 279.40 2906.334 9.1682 3.78E-01 1.26E+01 5.72E+00 2.57E-02 1.17E-02

11.25 285.75 2615.7006 8.2514 3.85E-01 1.28E+01 5.83E+00 2.54E-02 1.15E-02

11.50 292.10 2325.0672 7.3346 3.91E-01 1.31E+01 5.92E+00 2.52E-02 1.14E-02

11.75 298.45 2034.4338 6.4178 3.97E-01 1.32E+01 6.01E+00 2.50E-02 1.13E-02

12.00 304.80 1743.8004 5.5009 4.01E-01 1.34E+01 6.08E+00 2.48E-02 1.12E-02

Results for RBHT Test 1637

Valid Time Period 5576 to 5705 seconds
A-403

Figure A-335 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637G for Time Period 5576 to 5705 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-404

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-H 

Test Conditions

Date: 6/20/2003

Steady-state time window: 5905 – 6100 seconds

Inlet flow rate: 0.759 cm/sec (0.299 in./sec) 

Inlet mass flow rate: 0.035 kg/sec (0.077 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-405

Figure A-336 Inlet Flow Plot for Experiment 1637H 

Figure A-337 Inlet Temperature Plot for Experiment 1637H 
A-406

Figure A-338 System Pressure Plot for Experiment 1637H 

Figure A-339 Bundle Power Plot for Experiment 1637H 
A-407

Table A-135: Data Results for RBHT Test 1637 for Time Period 5905 to 6100 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.706 16.774 803.165 0.154 7.374 0.032 1.532 0.000 0.000 16.58 793.855 4336.58 207636.5649 0.71 0.706 0.714

* 120-133 3048-3378 383 0.701 20.155 965.042 0.171 8.188 0.058 2.777 0.096 4.612 19.83 949.465 4356.41 208586.0304 0.706 0.702 0.710

* 108-120 2743-3048 382 0.594 25.312 1211.959 0.143 6.847 0.072 3.447 6.357 304.389 18.74 897.276 4375.15 209483.3064 0.699 0.696 0.702

100-108 2540-2743 381 0.692 12.781 611.947 0.085 4.070 0.053 2.538 0.000 0.000 12.64 605.206 4387.79 210088.5129 0.696 0.693 0.699

97-100 2464-2540 380 0.538 7.193 344.391 0.030 1.436 0.019 0.910 0.000 0.000 7.141 341.913 4394.931 210430.4258 0.542 0.539 0.545

93-97 2362-2464 379 0.565 9.031 432.416 0.038 1.819 0.025 1.197 0.000 0.000 8.966 429.294 4403.897 210859.7202 0.568 0.565 0.571

* 85-93 2159-2362 378 0.429 23.728 1136.118 0.071 3.399 0.048 2.298 7.989 382.531 15.62 747.890 4419.517 211607.6098 0.624 0.621 0.627

81-85 2057-2159 377 0.677 6.710 321.266 0.033 1.580 0.023 1.101 0.000 0.000 6.651 318.452 4426.168 211926.0614 0.68 0.677 0.683

78-81 1981-2057 376 0.622 5.884 281.729 0.023 1.101 0.017 0.814 0.000 0.000 5.844 279.812 4432.012 212205.8736 0.625 0.622 0.628

75-78 1905-1981 375 0.541 7.151 342.402 0.022 1.053 0.016 0.766 0.000 0.000 7.108 340.333 4439.12 212546.2065 0.544 0.541 0.547

72-75 1829-1905 374 0.461 8.403 402.329 0.021 1.005 0.016 0.766 0.000 0.000 8.362 400.375 4447.482 212946.5812 0.463 0.461 0.465

* 67-72 1702-1829 373 0.389 15.871 759.899 0.033 1.580 0.026 1.245 3.702 177.244 12.11 579.830 4459.592 213526.4111 0.534 0.531 0.537

63-67 1600-1702 372 0.602 8.273 396.112 0.025 1.197 0.020 0.958 0.000 0.000 8.226 393.863 4467.818 213920.2741 0.604 0.601 0.607

60-63 1524-1600 371 0.410 9.197 440.373 0.017 0.814 0.014 0.670 0.000 0.000 9.164 438.775 4476.982 214359.0487 0.412 0.410 0.414

57-60 1448-1524 370 0.400 9.353 447.833 0.017 0.814 0.014 0.670 0.000 0.000 9.319 446.196 4486.301 214805.2449 0.402 0.400 0.404

53-57 1346-1448 369 0.384 12.796 612.693 0.021 1.005 0.018 0.862 0.000 0.000 12.75 610.473 4499.051 215415.7181 0.386 0.384 0.388

* 46-53 1168-1346 368 0.295 25.619 1226.630 0.032 1.532 0.030 1.436 5.337 255.522 20.22 968.139 4519.271 216383.8569 0.444 0.442 0.446

43-46 1092-1168 367 0.500 7.795 373.236 0.012 0.575 0.012 0.575 0.000 0.000 7.77 372.030 4527.041 216755.8865 0.501 0.498 0.504

37-43 940-1092 366 0.368 19.703 943.408 0.022 1.053 0.024 1.149 0.000 0.000 19.65 940.847 4546.691 217696.7336 0.369 0.367 0.371

* 25-37 635-940 365 0.239 47.451 2271.988 0.034 1.628 0.043 2.059 2.814 134.757 44.56 2133.544 4591.251 219830.2778 0.285 0.284 0.286

13-25 330-635 364 0.199 49.892 2388.857 0.019 0.910 0.037 1.772 0.000 0.000 49.82 2385.394 4641.071 222215.6722 0.2 0.199 0.201

* 0-13 0-330 363 0.047 64.361 3081.618 0.007 0.335 0.011 0.527 3.613 172.988 60.73 2907.768 4701.801 225123.4402 0.1 0.095 0.105

Results for RBHT Test 1637

Valid Time Period 5905 to 6100 seconds

Collapsed Liquid Level = 79.385 inches = 2016.38 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-135 Data Results for RBHT Test 1637

H for Time Period 5905 to 6100 seconds
A-408

Table A-136 Energy Balance Results for RBHT Test 1637H for Time Period 5905 to 6100 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.4322 5.4998 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.25 6.35 1840.2895 5.8053 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.50 12.70 1937.1469 6.1109 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

0.75 19.05 2034.0042 6.4164 0.00E+00 0.00E+00 0.00E+00 2.50E-02 1.13E-02

1.00 25.40 2130.8615 6.722 8.43E-03 1.70E-01 7.71E-02 2.48E-02 1.12E-02

1.25 31.75 2227.7189 7.0275 1.76E-02 3.55E-01 1.61E-01 2.45E-02 1.11E-02

1.50 38.10 2324.5762 7.333 2.72E-02 5.48E-01 2.49E-01 2.43E-02 1.10E-02

1.75 44.45 2421.4336 7.6386 3.72E-02 7.50E-01 3.40E-01 2.40E-02 1.09E-02

2.00 50.80 2518.2909 7.9441 4.76E-02 9.60E-01 4.35E-01 2.38E-02 1.08E-02

2.25 57.15 2615.1483 8.2497 5.84E-02 1.18E+00 5.34E-01 2.35E-02 1.07E-02

2.50 63.50 2712.0056 8.5552 6.96E-02 1.40E+00 6.37E-01 2.32E-02 1.05E-02

2.75 69.85 2808.8629 8.8608 8.12E-02 1.64E+00 7.43E-01 2.29E-02 1.04E-02

3.00 76.20 2905.7203 9.1663 9.32E-02 1.88E+00 8.53E-01 2.26E-02 1.03E-02

3.25 82.55 3002.5776 9.4718 1.06E-01 2.13E+00 9.67E-01 2.23E-02 1.01E-02

3.50 88.90 3099.435 9.7774 1.19E-01 2.39E+00 1.08E+00 2.20E-02 9.98E-03

3.75 95.25 3196.2923 10.083 1.32E-01 2.66E+00 1.21E+00 2.17E-02 9.83E-03

4.00 101.60 3293.1497 10.388 1.45E-01 2.93E+00 1.33E+00 2.13E-02 9.68E-03

4.25 107.95 3390.007 10.694 1.60E-01 3.22E+00 1.46E+00 2.10E-02 9.52E-03

4.50 114.30 3486.8644 11 1.74E-01 3.51E+00 1.59E+00 2.06E-02 9.35E-03

4.75 120.65 3583.7217 11.305 1.89E-01 3.81E+00 1.73E+00 2.02E-02 9.18E-03

5.00 127.00 3680.579 11.611 2.04E-01 4.12E+00 1.87E+00 1.99E-02 9.01E-03

5.25 133.35 3777.4364 11.916 2.20E-01 4.43E+00 2.01E+00 1.95E-02 8.83E-03

5.50 139.70 3874.2937 12.222 2.36E-01 4.76E+00 2.16E+00 1.91E-02 8.65E-03

5.75 146.05 3971.1511 12.527 2.53E-01 5.09E+00 2.31E+00 1.87E-02 8.46E-03

6.00 152.40 4068.0084 12.833 2.69E-01 5.43E+00 2.47E+00 1.82E-02 8.27E-03

6.25 158.75 4164.8658 13.138 2.87E-01 5.78E+00 2.62E+00 1.78E-02 8.08E-03

6.50 165.10 4261.7231 13.444 3.04E-01 6.14E+00 2.79E+00 1.74E-02 7.88E-03

6.75 171.45 4358.5804 13.749 3.23E-01 6.51E+00 2.95E+00 1.69E-02 7.67E-03

7.00 177.80 4455.4378 14.055 3.41E-01 6.88E+00 3.12E+00 1.64E-02 7.46E-03

7.25 184.15 4552.2951 14.361 3.60E-01 7.26E+00 3.30E+00 1.60E-02 7.24E-03

7.50 190.50 4649.1525 14.666 3.80E-01 7.66E+00 3.47E+00 1.55E-02 7.03E-03

7.75 196.85 4746.0098 14.972 3.99E-01 8.05E+00 3.65E+00 1.50E-02 6.80E-03

8.00 203.20 4842.8672 15.277 4.19E-01 8.46E+00 3.84E+00 1.45E-02 6.57E-03

8.25 209.55 4939.7245 15.583 4.40E-01 8.88E+00 4.03E+00 1.40E-02 6.34E-03

8.50 215.90 5036.5818 15.888 4.61E-01 9.30E+00 4.22E+00 1.35E-02 6.10E-03

8.75 222.25 5133.4392 16.194 4.82E-01 9.73E+00 4.41E+00 1.29E-02 5.86E-03

9.00 228.60 5230.2965 16.499 5.04E-01 1.02E+01 4.61E+00 1.24E-02 5.61E-03

9.25 234.95 4939.7245 15.583 5.26E-01 1.06E+01 4.81E+00 1.18E-02 5.37E-03

9.50 241.30 4649.1525 14.666 5.46E-01 1.10E+01 4.99E+00 1.13E-02 5.14E-03

9.75 247.65 4358.5804 13.749 5.65E-01 1.14E+01 5.17E+00 1.09E-02 4.93E-03

10.00 254.00 4068.0084 12.833 5.83E-01 1.18E+01 5.33E+00 1.04E-02 4.73E-03

10.25 260.35 3777.4364 11.916 5.99E-01 1.21E+01 5.48E+00 1.00E-02 4.54E-03

10.50 266.70 3486.8644 11 6.14E-01 1.24E+01 5.62E+00 9.63E-03 4.37E-03

10.75 273.05 3196.2923 10.083 6.28E-01 1.27E+01 5.75E+00 9.28E-03 4.21E-03

11.00 279.40 2905.7203 9.1663 6.41E-01 1.29E+01 5.87E+00 8.96E-03 4.06E-03

11.25 285.75 2615.1483 8.2497 6.53E-01 1.32E+01 5.97E+00 8.66E-03 3.93E-03

11.50 292.10 2324.5762 7.333 6.63E-01 1.34E+01 6.07E+00 8.40E-03 3.81E-03

11.75 298.45 2034.0042 6.4164 6.72E-01 1.36E+01 6.15E+00 8.18E-03 3.71E-03

12.00 304.80 1743.4322 5.4998 6.80E-01 1.37E+01 6.23E+00 7.98E-03 3.62E-03

Results for RBHT Test 1637

Valid Time Period 5905 to 6100 seconds
A-409

Figure A-340 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637H for Time Period 5905 to 6100 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-410

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-I 

Test Conditions

Date: 6/20/2003

Steady-state time window: 6307 – 6467 seconds

Inlet flow rate: 0.765 cm/sec (0.301 in./sec) 

Inlet mass flow rate: 0.035 kg/sec (0.078 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-411

Figure A-341 Inlet Flow Plot for Experiment 1637I 

Figure A-342 Inlet Temperature Plot for Experiment 1637I 
A-412

Figure A-343 System Pressure Plot for Experiment 1637I 

Figure A-344 Bundle Power Plot for Experiment 1637I 
A-413

Table A-137: Data Results for RBHT Test 1637 for Time Period 6307 to 6467 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.709 16.603 794.960 0.155 7.421 0.033 1.580 0.000 0.000 16.41 785.715 4336.41 207628.4253 0.713 0.709 0.717

* 120-133 3048-3378 383 0.702 20.150 964.793 0.173 8.283 0.058 2.777 0.179 8.576 19.74 945.156 4356.15 208573.5815 0.708 0.704 0.712

* 108-120 2743-3048 382 0.596 25.208 1206.986 0.144 6.895 0.073 3.495 6.131 293.574 18.86 903.022 4375.01 209476.6032 0.697 0.694 0.700

100-108 2540-2743 381 0.689 12.931 619.158 0.086 4.118 0.053 2.538 0.000 0.000 12.79 612.388 4387.8 210088.9917 0.692 0.689 0.695

97-100 2464-2540 380 0.535 7.240 346.629 0.030 1.436 0.019 0.910 0.000 0.000 7.186 344.068 4394.986 210433.0592 0.539 0.536 0.542

93-97 2362-2464 379 0.567 9.000 430.924 0.039 1.867 0.025 1.197 0.000 0.000 8.935 427.810 4403.921 210860.8693 0.57 0.567 0.573

* 85-93 2159-2362 378 0.428 23.749 1137.113 0.071 3.399 0.048 2.298 7.990 382.568 15.64 748.847 4419.561 211609.7165 0.623 0.620 0.626

81-85 2057-2159 377 0.675 6.762 323.753 0.033 1.580 0.023 1.101 0.000 0.000 6.705 321.037 4426.266 211930.7536 0.677 0.674 0.680

78-81 1981-2057 376 0.628 5.801 277.751 0.023 1.101 0.017 0.814 0.000 0.000 5.757 275.647 4432.023 212206.4003 0.63 0.627 0.633

75-78 1905-1981 375 0.541 7.151 342.402 0.022 1.053 0.016 0.766 0.000 0.000 7.112 340.524 4439.135 212546.9247 0.543 0.540 0.546

72-75 1829-1905 374 0.466 8.325 398.599 0.021 1.005 0.016 0.766 0.000 0.000 8.284 396.640 4447.419 212943.5647 0.468 0.466 0.470

* 67-72 1702-1829 373 0.391 15.824 757.661 0.034 1.628 0.026 1.245 3.734 178.789 12.03 575.999 4459.449 213519.5642 0.537 0.534 0.540

63-67 1600-1702 372 0.603 8.242 394.620 0.025 1.197 0.020 0.958 0.000 0.000 8.196 392.427 4467.645 213911.9908 0.605 0.602 0.608

60-63 1524-1600 371 0.416 9.099 435.649 0.018 0.862 0.015 0.718 0.000 0.000 9.061 433.843 4476.706 214345.8338 0.418 0.416 0.420

57-60 1448-1524 370 0.396 9.405 450.320 0.017 0.814 0.014 0.670 0.000 0.000 9.373 448.782 4486.079 214794.6154 0.398 0.396 0.400

53-57 1346-1448 369 0.386 12.755 610.704 0.021 1.005 0.018 0.862 0.000 0.000 12.71 608.558 4498.789 215403.1735 0.388 0.386 0.390

* 46-53 1168-1346 368 0.292 25.723 1231.603 0.033 1.580 0.030 1.436 5.650 270.503 20.01 958.084 4518.799 216361.2575 0.45 0.448 0.452

43-46 1092-1168 367 0.509 7.645 366.025 0.013 0.622 0.012 0.575 0.000 0.000 7.617 364.704 4526.416 216725.9614 0.511 0.508 0.514

37-43 940-1092 366 0.376 19.454 931.473 0.022 1.053 0.024 1.149 0.000 0.000 19.4 928.877 4545.816 217654.8384 0.377 0.375 0.379

* 25-37 635-940 365 0.235 47.701 2283.924 0.034 1.628 0.043 2.059 3.254 155.790 44.37 2124.447 4590.186 219779.2854 0.288 0.287 0.289

13-25 330-635 364 0.198 50.012 2394.576 0.020 0.958 0.037 1.772 0.000 0.000 49.94 2391.140 4640.126 222170.4254 0.198 0.197 0.199

* 0-13 0-330 363 0.046 64.382 3082.613 0.007 0.335 0.010 0.479 3.575 171.158 60.79 2910.641 4700.916 225081.0662 0.099 0.094 0.104

Results for RBHT Test 1637

Valid Time Period 6307 to 6467 seconds

Collapsed Liquid Level = 79.398 inches = 2016.71 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-137 Data Results for RBHT Test 1637I for Time Period 6307 to 6467 seconds
A-414

Table A-138 Energy Balance Results for RBHT Test 1637I for Time Period 6307 to 6467 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1744.0696 5.5018 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.25 6.35 1840.9623 5.8074 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.50 12.70 1937.8551 6.1131 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

0.75 19.05 2034.7478 6.4188 0.00E+00 0.00E+00 0.00E+00 2.52E-02 1.14E-02

1.00 25.40 2131.6406 6.7244 8.11E-03 1.65E-01 7.48E-02 2.50E-02 1.13E-02

1.25 31.75 2228.5334 7.0301 1.72E-02 3.50E-01 1.59E-01 2.47E-02 1.12E-02

1.50 38.10 2325.4261 7.3357 2.67E-02 5.44E-01 2.47E-01 2.45E-02 1.11E-02

1.75 44.45 2422.3189 7.6414 3.67E-02 7.45E-01 3.38E-01 2.42E-02 1.10E-02

2.00 50.80 2519.2116 7.947 4.70E-02 9.55E-01 4.33E-01 2.40E-02 1.09E-02

2.25 57.15 2616.1044 8.2527 5.77E-02 1.17E+00 5.32E-01 2.37E-02 1.08E-02

2.50 63.50 2712.9971 8.5583 6.88E-02 1.40E+00 6.35E-01 2.34E-02 1.06E-02

2.75 69.85 2809.8899 8.864 8.04E-02 1.63E+00 7.41E-01 2.31E-02 1.05E-02

3.00 76.20 2906.7826 9.1697 9.23E-02 1.88E+00 8.52E-01 2.28E-02 1.04E-02

3.25 82.55 3003.6754 9.4753 1.05E-01 2.13E+00 9.65E-01 2.25E-02 1.02E-02

3.50 88.90 3100.5681 9.781 1.17E-01 2.39E+00 1.08E+00 2.22E-02 1.01E-02

3.75 95.25 3197.4609 10.087 1.31E-01 2.65E+00 1.20E+00 2.19E-02 9.92E-03

4.00 101.60 3294.3537 10.392 1.44E-01 2.93E+00 1.33E+00 2.15E-02 9.77E-03

4.25 107.95 3391.2464 10.698 1.58E-01 3.22E+00 1.46E+00 2.12E-02 9.61E-03

4.50 114.30 3488.1392 11.004 1.72E-01 3.51E+00 1.59E+00 2.08E-02 9.44E-03

4.75 120.65 3585.0319 11.309 1.87E-01 3.81E+00 1.73E+00 2.04E-02 9.27E-03

5.00 127.00 3681.9247 11.615 2.02E-01 4.12E+00 1.87E+00 2.01E-02 9.10E-03

5.25 133.35 3778.8174 11.921 2.18E-01 4.43E+00 2.01E+00 1.97E-02 8.92E-03

5.50 139.70 3875.7102 12.226 2.34E-01 4.76E+00 2.16E+00 1.93E-02 8.74E-03

5.75 146.05 3972.6029 12.532 2.50E-01 5.09E+00 2.31E+00 1.89E-02 8.55E-03

6.00 152.40 4069.4957 12.838 2.67E-01 5.43E+00 2.46E+00 1.84E-02 8.36E-03

6.25 158.75 4166.3885 13.143 2.84E-01 5.78E+00 2.62E+00 1.80E-02 8.17E-03

6.50 165.10 4263.2812 13.449 3.02E-01 6.14E+00 2.79E+00 1.76E-02 7.97E-03

6.75 171.45 4360.174 13.754 3.20E-01 6.51E+00 2.95E+00 1.71E-02 7.76E-03

7.00 177.80 4457.0667 14.06 3.38E-01 6.88E+00 3.12E+00 1.66E-02 7.55E-03

7.25 184.15 4553.9595 14.366 3.57E-01 7.27E+00 3.30E+00 1.62E-02 7.33E-03

7.50 190.50 4650.8522 14.671 3.76E-01 7.66E+00 3.47E+00 1.57E-02 7.12E-03

7.75 196.85 4747.745 14.977 3.96E-01 8.05E+00 3.65E+00 1.52E-02 6.89E-03

8.00 203.20 4844.6377 15.283 4.16E-01 8.46E+00 3.84E+00 1.47E-02 6.66E-03

8.25 209.55 4941.5305 15.588 4.37E-01 8.88E+00 4.03E+00 1.42E-02 6.43E-03

8.50 215.90 5038.4232 15.894 4.57E-01 9.30E+00 4.22E+00 1.36E-02 6.19E-03

8.75 222.25 5135.316 16.2 4.79E-01 9.73E+00 4.42E+00 1.31E-02 5.95E-03

9.00 228.60 5232.2088 16.505 5.00E-01 1.02E+01 4.62E+00 1.26E-02 5.70E-03

9.25 234.95 4941.5305 15.588 5.22E-01 1.06E+01 4.81E+00 1.20E-02 5.46E-03

9.50 241.30 4650.8522 14.671 5.42E-01 1.10E+01 5.00E+00 1.15E-02 5.23E-03

9.75 247.65 4360.174 13.754 5.60E-01 1.14E+01 5.17E+00 1.11E-02 5.02E-03

10.00 254.00 4069.4957 12.838 5.78E-01 1.18E+01 5.33E+00 1.06E-02 4.82E-03

10.25 260.35 3778.8174 11.921 5.94E-01 1.21E+01 5.48E+00 1.02E-02 4.63E-03

10.50 266.70 3488.1392 11.004 6.10E-01 1.24E+01 5.62E+00 9.82E-03 4.46E-03

10.75 273.05 3197.4609 10.087 6.24E-01 1.27E+01 5.75E+00 9.47E-03 4.30E-03

11.00 279.40 2906.7826 9.1697 6.36E-01 1.29E+01 5.87E+00 9.15E-03 4.15E-03

11.25 285.75 2616.1044 8.2527 6.48E-01 1.32E+01 5.98E+00 8.86E-03 4.02E-03

11.50 292.10 2325.4261 7.3357 6.58E-01 1.34E+01 6.07E+00 8.60E-03 3.90E-03

11.75 298.45 2034.7478 6.4188 6.67E-01 1.36E+01 6.16E+00 8.37E-03 3.80E-03

12.00 304.80 1744.0696 5.5018 6.75E-01 1.37E+01 6.23E+00 8.17E-03 3.71E-03

Results for RBHT Test 1637

Valid Time Period 6307 to 6467 seconds
A-415

Figure A-345 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637I for Time Period 6307 to 6467 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-416

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-J 

Test Conditions

Date: 6/20/2003

Steady-state time window: 6805 – 6960 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.052 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-417

Figure A-346 Inlet Flow Plot for Experiment 1637J 

Figure A-347 Inlet Temperature Plot for Experiment 1637J 
A-418

Figure A-348 System Pressure Plot for Experiment 1637J 

Figure A-349 Bundle Power Plot for Experiment 1637J 
A-419

Table A-139: Data Results for RBHT Test 1637 for Time Period 6805 to 6960 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.755 13.980 669.387 0.082 3.926 0.010 0.479 0.000 0.000 13.89 665.057 4333.89 207507.767 0.757 0.753 0.761

* 120-133 3048-3378 383 0.726 18.467 884.228 0.105 5.027 0.039 1.867 1.023 49.005 17.3 828.328 4351.19 208336.0955 0.744 0.740 0.748

* 108-120 2743-3048 382 0.611 24.268 1161.979 0.092 4.405 0.048 2.298 6.508 311.625 17.62 843.650 4368.81 209179.7456 0.717 0.713 0.721

100-108 2540-2743 381 0.702 12.391 593.298 0.056 2.681 0.035 1.676 0.000 0.000 12.29 588.448 4381.1 209768.1939 0.704 0.700 0.708

97-100 2464-2540 380 0.556 6.918 331.212 0.020 0.958 0.013 0.622 0.000 0.000 6.885 329.656 4387.985 210097.8495 0.558 0.555 0.561

93-97 2362-2464 379 0.575 8.823 422.470 0.025 1.197 0.017 0.814 0.000 0.000 8.78 420.389 4396.765 210518.2382 0.577 0.574 0.580

* 85-93 2159-2362 378 0.433 23.547 1127.415 0.046 2.202 0.032 1.532 8.239 394.464 15.23 729.216 4411.995 211247.4545 0.633 0.630 0.636

81-85 2057-2159 377 0.688 6.492 310.822 0.021 1.005 0.015 0.718 0.000 0.000 6.454 309.019 4418.449 211556.4737 0.689 0.686 0.692

78-81 1981-2057 376 0.632 5.733 274.518 0.015 0.718 0.011 0.527 0.000 0.000 5.704 273.109 4424.153 211829.5826 0.634 0.631 0.637

75-78 1905-1981 375 0.547 7.053 337.678 0.015 0.718 0.011 0.527 0.000 0.000 7.023 336.263 4431.176 212165.8457 0.549 0.546 0.552

72-75 1829-1905 374 0.482 8.070 386.414 0.014 0.670 0.011 0.527 0.000 0.000 8.041 385.005 4439.217 212550.8508 0.484 0.482 0.486

* 67-72 1702-1829 373 0.388 15.892 760.893 0.022 1.053 0.017 0.814 4.213 201.700 11.64 557.326 4450.857 213108.177 0.551 0.548 0.554

63-67 1600-1702 372 0.618 7.941 380.198 0.016 0.766 0.013 0.622 0.000 0.000 7.909 378.685 4458.766 213486.862 0.619 0.616 0.622

60-63 1524-1600 371 0.425 8.964 429.184 0.011 0.527 0.010 0.479 0.000 0.000 8.939 428.002 4467.705 213914.8636 0.426 0.424 0.428

57-60 1448-1524 370 0.406 9.249 442.860 0.011 0.527 0.009 0.431 0.000 0.000 9.228 441.839 4476.933 214356.7026 0.408 0.406 0.410

53-57 1346-1448 369 0.398 12.500 598.520 0.013 0.622 0.012 0.575 0.000 0.000 12.47 597.067 4489.403 214953.7694 0.4 0.398 0.402

* 46-53 1168-1346 368 0.293 25.691 1230.111 0.021 1.005 0.020 0.958 6.050 289.695 19.6 938.453 4509.003 215892.2225 0.461 0.459 0.463

43-46 1092-1168 367 0.521 7.468 357.570 0.008 0.383 0.008 0.383 0.000 0.000 7.448 356.612 4516.451 216248.8346 0.522 0.519 0.525

37-43 940-1092 366 0.398 18.774 898.899 0.015 0.718 0.016 0.766 0.000 0.000 18.74 897.276 4535.191 217146.1106 0.399 0.397 0.401

* 25-37 635-940 365 0.253 46.532 2227.975 0.023 1.101 0.029 1.389 4.030 192.969 42.45 2032.517 4577.641 219178.6275 0.319 0.317 0.321

13-25 330-635 364 0.238 47.477 2273.231 0.014 0.670 0.024 1.149 0.000 0.000 47.42 2270.482 4625.061 221449.1093 0.239 0.238 0.240

* 0-13 0-330 363 0.058 63.587 3044.568 0.006 0.287 0.012 0.575 4.139 198.183 59.43 2845.524 4684.491 224294.633 0.119 0.118 0.120

Results for RBHT Test 1637

Valid Time Period 6805 to 6960 seconds

Collapsed Liquid Level = 76.872 inches = 1952.54 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-139 Data Results for RBHT Test 1637

J for Time Period 6805 to 6960 seconds
A-420

Table A-140 Energy Balance Results for RBHT Test 1637J for Time Period 6805 to 6960 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.8185 5.4978 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.25 6.35 1839.6418 5.8033 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.50 12.70 1936.465 6.1087 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.75 19.05 2033.2883 6.4142 1.13E-02 1.52E-01 6.91E-02 1.65E-02 7.50E-03

1.00 25.40 2130.1115 6.7196 2.43E-02 3.29E-01 1.49E-01 1.63E-02 7.40E-03

1.25 31.75 2226.9348 7.025 3.80E-02 5.14E-01 2.33E-01 1.61E-02 7.29E-03

1.50 38.10 2323.758 7.3305 5.23E-02 7.08E-01 3.21E-01 1.58E-02 7.19E-03

1.75 44.45 2420.5813 7.6359 6.73E-02 9.09E-01 4.12E-01 1.56E-02 7.07E-03

2.00 50.80 2517.4045 7.9413 8.28E-02 1.12E+00 5.08E-01 1.53E-02 6.95E-03

2.25 57.15 2614.2278 8.2468 9.89E-02 1.34E+00 6.07E-01 1.51E-02 6.83E-03

2.50 63.50 2711.051 8.5522 1.16E-01 1.56E+00 7.09E-01 1.48E-02 6.71E-03

2.75 69.85 2807.8743 8.8576 1.33E-01 1.80E+00 8.16E-01 1.45E-02 6.57E-03

3.00 76.20 2904.6975 9.1631 1.51E-01 2.04E+00 9.26E-01 1.42E-02 6.44E-03

3.25 82.55 3001.5208 9.4685 1.70E-01 2.29E+00 1.04E+00 1.39E-02 6.30E-03

3.50 88.90 3098.344 9.7739 1.89E-01 2.55E+00 1.16E+00 1.36E-02 6.15E-03

3.75 95.25 3195.1673 10.079 2.08E-01 2.82E+00 1.28E+00 1.32E-02 6.00E-03

4.00 101.60 3291.9905 10.385 2.29E-01 3.09E+00 1.40E+00 1.29E-02 5.85E-03

4.25 107.95 3388.8138 10.69 2.50E-01 3.38E+00 1.53E+00 1.25E-02 5.69E-03

4.50 114.30 3485.637 10.996 2.71E-01 3.67E+00 1.66E+00 1.22E-02 5.52E-03

4.75 120.65 3582.4603 11.301 2.94E-01 3.97E+00 1.80E+00 1.18E-02 5.36E-03

5.00 127.00 3679.2835 11.607 3.17E-01 4.28E+00 1.94E+00 1.14E-02 5.18E-03

5.25 133.35 3776.1068 11.912 3.40E-01 4.60E+00 2.08E+00 1.10E-02 5.01E-03

5.50 139.70 3872.93 12.217 3.64E-01 4.92E+00 2.23E+00 1.06E-02 4.82E-03

5.75 146.05 3969.7533 12.523 3.89E-01 5.25E+00 2.38E+00 1.02E-02 4.64E-03

6.00 152.40 4066.5765 12.828 4.14E-01 5.60E+00 2.54E+00 9.80E-03 4.44E-03

6.25 158.75 4163.3998 13.134 4.40E-01 5.95E+00 2.70E+00 9.37E-03 4.25E-03

6.50 165.10 4260.223 13.439 4.66E-01 6.30E+00 2.86E+00 8.92E-03 4.05E-03

6.75 171.45 4357.0463 13.745 4.93E-01 6.67E+00 3.03E+00 8.47E-03 3.84E-03

7.00 177.80 4453.8695 14.05 5.21E-01 7.04E+00 3.20E+00 8.01E-03 3.63E-03

7.25 184.15 4550.6928 14.355 5.49E-01 7.43E+00 3.37E+00 7.53E-03 3.42E-03

7.50 190.50 4647.516 14.661 5.78E-01 7.82E+00 3.55E+00 7.05E-03 3.20E-03

7.75 196.85 4744.3393 14.966 6.08E-01 8.22E+00 3.73E+00 6.56E-03 2.97E-03

8.00 203.20 4841.1625 15.272 6.38E-01 8.62E+00 3.91E+00 6.05E-03 2.75E-03

8.25 209.55 4937.9858 15.577 6.69E-01 9.04E+00 4.10E+00 5.54E-03 2.51E-03

8.50 215.90 5034.809 15.883 7.00E-01 9.46E+00 4.29E+00 5.02E-03 2.28E-03

8.75 222.25 5131.6323 16.188 7.32E-01 9.90E+00 4.49E+00 4.48E-03 2.03E-03

9.00 228.60 5228.4555 16.494 7.64E-01 1.03E+01 4.69E+00 3.94E-03 1.79E-03

9.25 234.95 4937.9858 15.577 7.96E-01 1.08E+01 4.88E+00 3.41E-03 1.54E-03

9.50 241.30 4647.516 14.661 8.27E-01 1.12E+01 5.07E+00 2.90E-03 1.32E-03

9.75 247.65 4357.0463 13.745 8.55E-01 1.16E+01 5.24E+00 2.43E-03 1.10E-03

10.00 254.00 4066.5765 12.828 8.81E-01 1.19E+01 5.40E+00 1.99E-03 9.01E-04

10.25 260.35 3776.1068 11.912 9.06E-01 1.22E+01 5.56E+00 1.57E-03 7.13E-04

10.50 266.70 3485.637 10.996 9.29E-01 1.26E+01 5.70E+00 1.19E-03 5.41E-04

10.75 273.05 3195.1673 10.079 9.50E-01 1.28E+01 5.82E+00 8.41E-04 3.81E-04

11.00 279.40 2904.6975 9.1631 9.69E-01 1.31E+01 5.94E+00 5.20E-04 2.36E-04

11.25 285.75 2614.2278 8.2468 9.86E-01 1.33E+01 6.05E+00 2.31E-04 1.05E-04

11.50 292.10 2323.758 7.3305 1.00E+00 1.35E+01 6.13E+00 0.00E+00 0.00E+00

11.75 298.45 2033.2883 6.4142 1.00E+00 1.35E+01 6.13E+00 0.00E+00 0.00E+00

12.00 304.80 1742.8185 5.4978 1.00E+00 1.35E+01 6.13E+00 0.00E+00 0.00E+00

Results for RBHT Test 1637

Valid Time Period 6805 to 6960 seconds
A-421

Figure A-350: Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637J for Time Period 6805 to 6960 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-422

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-K 

Test Conditions

Date: 6/20/2003

Steady-state time window: 6990 – 7110 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.052 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-423

Figure A-351 Inlet Flow Plot for Experiment 1637K 

Figure A-352 Inlet Temperature Plot for Experiment 1637K 
A-424

Figure A-353 System Pressure Plot for Experiment 1637K 

Figure A-354 Bundle Power Plot for Experiment 1637K 
A-425

Table A-141: Data Results for RBHT Test 1637 for Time Period 6990 to 7110 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.755 13.980 669.387 0.083 3.974 0.012 0.575 0.000 0.000 13.88 664.578 4333.88 207507.2882 0.757 0.753 0.761

* 120-133 3048-3378 383 0.727 18.431 882.487 0.105 5.027 0.039 1.867 0.977 46.785 17.31 828.807 4351.19 208336.0955 0.744 0.740 0.748

* 108-120 2743-3048 382 0.610 24.294 1163.222 0.093 4.453 0.048 2.298 6.513 311.863 17.64 844.608 4368.83 209180.7032 0.717 0.713 0.721

100-108 2540-2743 381 0.701 12.412 594.293 0.056 2.681 0.035 1.676 0.000 0.000 12.32 589.885 4381.15 209770.588 0.703 0.699 0.707

97-100 2464-2540 380 0.551 6.995 334.942 0.020 0.958 0.013 0.622 0.000 0.000 6.96 333.247 4388.11 210103.8345 0.553 0.550 0.556

93-97 2362-2464 379 0.576 8.813 421.973 0.025 1.197 0.017 0.814 0.000 0.000 8.77 419.910 4396.88 210523.7444 0.578 0.575 0.581

* 85-93 2159-2362 378 0.433 23.573 1128.659 0.047 2.250 0.032 1.532 8.264 395.660 15.23 729.216 4412.11 211252.9607 0.633 0.630 0.636

81-85 2057-2159 377 0.687 6.497 311.071 0.021 1.005 0.015 0.718 0.000 0.000 6.459 309.259 4418.569 211562.2193 0.689 0.686 0.692

78-81 1981-2057 376 0.634 5.697 272.778 0.015 0.718 0.011 0.527 0.000 0.000 5.671 271.529 4424.24 211833.7482 0.636 0.633 0.639

75-78 1905-1981 375 0.546 7.079 338.921 0.015 0.718 0.011 0.527 0.000 0.000 7.053 337.699 4431.293 212171.4477 0.547 0.544 0.550

72-75 1829-1905 374 0.478 8.133 389.398 0.014 0.670 0.011 0.527 0.000 0.000 8.107 388.165 4439.4 212559.6129 0.48 0.478 0.482

* 67-72 1702-1829 373 0.391 15.808 756.915 0.022 1.053 0.017 0.814 4.009 191.976 11.76 563.072 4451.16 213122.6847 0.547 0.544 0.550

63-67 1600-1702 372 0.613 8.034 384.674 0.016 0.766 0.013 0.622 0.000 0.000 8.004 383.234 4459.164 213505.9183 0.615 0.612 0.618

60-63 1524-1600 371 0.423 8.995 430.676 0.011 0.527 0.010 0.479 0.000 0.000 8.97 429.486 4468.134 213935.4042 0.424 0.422 0.426

57-60 1448-1524 370 0.408 9.223 441.617 0.011 0.527 0.009 0.431 0.000 0.000 9.199 440.450 4477.333 214375.8547 0.409 0.407 0.411

53-57 1346-1448 369 0.396 12.557 601.255 0.013 0.622 0.012 0.575 0.000 0.000 12.53 599.940 4489.863 214975.7943 0.397 0.395 0.399

* 46-53 1168-1346 368 0.295 25.624 1226.878 0.021 1.005 0.020 0.958 5.883 281.674 19.7 943.241 4509.563 215919.0354 0.458 0.456 0.460

43-46 1092-1168 367 0.518 7.510 359.559 0.008 0.383 0.008 0.383 0.000 0.000 7.492 358.719 4517.055 216277.7543 0.519 0.516 0.522

37-43 940-1092 366 0.394 18.888 904.369 0.015 0.718 0.016 0.766 0.000 0.000 18.85 902.543 4535.905 217180.2971 0.395 0.393 0.397

* 25-37 635-940 365 0.252 46.621 2232.203 0.023 1.101 0.029 1.389 3.959 189.535 42.61 2040.178 4578.515 219220.4749 0.316 0.314 0.318

13-25 330-635 364 0.237 47.566 2277.458 0.014 0.670 0.025 1.197 0.000 0.000 47.51 2274.791 4626.025 221495.2659 0.237 0.236 0.238

* 0-13 0-330 363 0.057 63.634 3046.806 0.006 0.287 0.012 0.575 4.136 198.027 59.48 2847.918 4685.505 224343.1836 0.119 0.118 0.120

Results for RBHT Test 1637

Valid Time Period 6990 to 7110 seconds

Collapsed Liquid Level = 77.068 inches = 1957.54 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-141 Data Results for RBHT Test 1637

K for Time Period 6990 to 7110 seconds
A-426

Table A-142 Energy Balance Results for RBHT Test 1637K for Time Period 6990 to 7110 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1741.829 5.4947 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.25 6.35 1838.5973 5.8 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.50 12.70 1935.3656 6.1052 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.60E-03

0.75 19.05 2032.1338 6.4105 1.08E-02 1.46E-01 6.64E-02 1.66E-02 7.51E-03

1.00 25.40 2128.9021 6.7158 2.39E-02 3.23E-01 1.47E-01 1.63E-02 7.42E-03

1.25 31.75 2225.6704 7.021 3.75E-02 5.08E-01 2.30E-01 1.61E-02 7.31E-03

1.50 38.10 2322.4387 7.3263 5.18E-02 7.01E-01 3.18E-01 1.59E-02 7.20E-03

1.75 44.45 2419.207 7.6316 6.67E-02 9.03E-01 4.09E-01 1.56E-02 7.09E-03

2.00 50.80 2515.9752 7.9368 8.21E-02 1.11E+00 5.05E-01 1.54E-02 6.97E-03

2.25 57.15 2612.7435 8.2421 9.82E-02 1.33E+00 6.03E-01 1.51E-02 6.85E-03

2.50 63.50 2709.5118 8.5473 1.15E-01 1.56E+00 7.06E-01 1.48E-02 6.72E-03

2.75 69.85 2806.2801 8.8526 1.32E-01 1.79E+00 8.12E-01 1.45E-02 6.59E-03

3.00 76.20 2903.0483 9.1579 1.50E-01 2.03E+00 9.22E-01 1.42E-02 6.46E-03

3.25 82.55 2999.8166 9.4631 1.69E-01 2.28E+00 1.04E+00 1.39E-02 6.32E-03

3.50 88.90 3096.5849 9.7684 1.88E-01 2.54E+00 1.15E+00 1.36E-02 6.17E-03

3.75 95.25 3193.3532 10.074 2.08E-01 2.81E+00 1.27E+00 1.33E-02 6.02E-03

4.00 101.60 3290.1215 10.379 2.28E-01 3.09E+00 1.40E+00 1.29E-02 5.87E-03

4.25 107.95 3386.8897 10.684 2.49E-01 3.37E+00 1.53E+00 1.26E-02 5.71E-03

4.50 114.30 3483.658 10.989 2.70E-01 3.66E+00 1.66E+00 1.22E-02 5.54E-03

4.75 120.65 3580.4263 11.295 2.93E-01 3.96E+00 1.80E+00 1.18E-02 5.37E-03

5.00 127.00 3677.1946 11.6 3.15E-01 4.27E+00 1.94E+00 1.15E-02 5.20E-03

5.25 133.35 3773.9628 11.905 3.39E-01 4.59E+00 2.08E+00 1.11E-02 5.02E-03

5.50 139.70 3870.7311 12.21 3.63E-01 4.91E+00 2.23E+00 1.07E-02 4.84E-03

5.75 146.05 3967.4994 12.516 3.87E-01 5.24E+00 2.38E+00 1.03E-02 4.66E-03

6.00 152.40 4064.2677 12.821 4.12E-01 5.59E+00 2.53E+00 9.84E-03 4.46E-03

6.25 158.75 4161.036 13.126 4.38E-01 5.94E+00 2.69E+00 9.41E-03 4.27E-03

6.50 165.10 4257.8042 13.432 4.65E-01 6.29E+00 2.85E+00 8.97E-03 4.07E-03

6.75 171.45 4354.5725 13.737 4.92E-01 6.66E+00 3.02E+00 8.51E-03 3.86E-03

7.00 177.80 4451.3408 14.042 5.19E-01 7.03E+00 3.19E+00 8.05E-03 3.65E-03

7.25 184.15 4548.1091 14.347 5.48E-01 7.42E+00 3.36E+00 7.58E-03 3.44E-03

7.50 190.50 4644.8773 14.653 5.76E-01 7.81E+00 3.54E+00 7.10E-03 3.22E-03

7.75 196.85 4741.6456 14.958 6.06E-01 8.20E+00 3.72E+00 6.60E-03 3.00E-03

8.00 203.20 4838.4139 15.263 6.36E-01 8.61E+00 3.91E+00 6.10E-03 2.77E-03

8.25 209.55 4935.1822 15.568 6.66E-01 9.03E+00 4.09E+00 5.59E-03 2.53E-03

8.50 215.90 5031.9505 15.874 6.98E-01 9.45E+00 4.29E+00 5.06E-03 2.30E-03

8.75 222.25 5128.7187 16.179 7.30E-01 9.88E+00 4.48E+00 4.53E-03 2.05E-03

9.00 228.60 5225.487 16.484 7.62E-01 1.03E+01 4.68E+00 3.98E-03 1.81E-03

9.25 234.95 4935.1822 15.568 7.94E-01 1.08E+01 4.88E+00 3.45E-03 1.57E-03

9.50 241.30 4644.8773 14.653 8.24E-01 1.12E+01 5.06E+00 2.95E-03 1.34E-03

9.75 247.65 4354.5725 13.737 8.52E-01 1.15E+01 5.24E+00 2.48E-03 1.12E-03

10.00 254.00 4064.2677 12.821 8.79E-01 1.19E+01 5.40E+00 2.03E-03 9.22E-04

10.25 260.35 3773.9628 11.905 9.03E-01 1.22E+01 5.55E+00 1.62E-03 7.35E-04

10.50 266.70 3483.658 10.989 9.26E-01 1.25E+01 5.69E+00 1.24E-03 5.62E-04

10.75 273.05 3193.3532 10.074 9.47E-01 1.28E+01 5.82E+00 8.89E-04 4.03E-04

11.00 279.40 2903.0483 9.1579 9.66E-01 1.31E+01 5.94E+00 5.69E-04 2.58E-04

11.25 285.75 2612.7435 8.2421 9.83E-01 1.33E+01 6.04E+00 2.80E-04 1.27E-04

11.50 292.10 2322.4387 7.3263 9.99E-01 1.35E+01 6.14E+00 2.01E-05 9.12E-06

11.75 298.45 2032.1338 6.4105 1.00E+00 1.35E+01 6.14E+00 0.00E+00 0.00E+00

12.00 304.80 1741.829 5.4947 1.00E+00 1.35E+01 6.14E+00 0.00E+00 0.00E+00

Results for RBHT Test 1637

Valid Time Period 6990 to 7110 seconds
A-427

Figure A-355 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637K for Time Period 6990 to 7110 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-428

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-L 

Test Conditions

Date: 6/20/2003

Steady-state time window: 7170 – 7270 seconds

Inlet flow rate: 0.508 cm/sec (0.200 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.052 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-429

Figure A-356 Inlet Flow Plot for Experiment 1637L 

Figure A-357 Inlet Temperature Plot for Experiment 1637L 
A-430

Figure A-358 System Pressure Plot for Experiment 1637L 

Figure A-359 Bundle Power Plot for Experiment 1637L 
A-431

Table A-143: Data Results for RBHT Test 1637 for Time Period 7170 to 7270 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.758 13.804 660.933 0.082 3.926 0.011 0.527 0.000 0.000 13.71 656.438 4333.71 207499.1486 0.76 0.756 0.764

* 120-133 3048-3378 383 0.727 18.405 881.244 0.105 5.027 0.039 1.867 1.121 53.682 17.14 820.668 4350.85 208319.8162 0.746 0.742 0.750

* 108-120 2743-3048 382 0.610 24.320 1164.465 0.092 4.405 0.048 2.298 6.610 316.506 17.57 841.256 4368.42 209161.0723 0.718 0.714 0.722

100-108 2540-2743 381 0.702 12.391 593.298 0.056 2.681 0.035 1.676 0.000 0.000 12.29 588.448 4380.71 209749.5206 0.704 0.700 0.708

97-100 2464-2540 380 0.549 7.027 336.434 0.020 0.958 0.013 0.622 0.000 0.000 6.992 334.779 4387.702 210084.2994 0.551 0.548 0.554

93-97 2362-2464 379 0.570 8.933 427.692 0.025 1.197 0.017 0.814 0.000 0.000 8.885 425.416 4396.587 210509.7155 0.572 0.569 0.575

* 85-93 2159-2362 378 0.435 23.495 1124.929 0.046 2.202 0.032 1.532 8.017 383.838 15.4 737.356 4411.987 211247.0714 0.629 0.626 0.632

81-85 2057-2159 377 0.685 6.549 313.558 0.021 1.005 0.015 0.718 0.000 0.000 6.512 311.796 4418.499 211558.8677 0.686 0.683 0.689

78-81 1981-2057 376 0.637 5.661 271.037 0.015 0.718 0.011 0.527 0.000 0.000 5.63 269.566 4424.129 211828.4335 0.639 0.636 0.642

75-78 1905-1981 375 0.546 7.073 338.672 0.015 0.718 0.011 0.527 0.000 0.000 7.044 337.269 4431.173 212165.7021 0.548 0.545 0.551

72-75 1829-1905 374 0.477 8.143 389.896 0.014 0.670 0.011 0.527 0.000 0.000 8.118 388.692 4439.291 212554.394 0.479 0.477 0.481

* 67-72 1702-1829 373 0.393 15.751 754.180 0.022 1.053 0.017 0.814 3.992 191.156 11.72 561.157 4451.011 213115.5506 0.549 0.546 0.552

63-67 1600-1702 372 0.617 7.956 380.944 0.016 0.766 0.013 0.622 0.000 0.000 7.923 379.355 4458.934 213494.9059 0.619 0.616 0.622

60-63 1524-1600 371 0.423 8.995 430.676 0.011 0.527 0.010 0.479 0.000 0.000 8.972 429.582 4467.906 213924.4875 0.424 0.422 0.426

57-60 1448-1524 370 0.408 9.229 441.865 0.011 0.527 0.009 0.431 0.000 0.000 9.205 440.738 4477.111 214365.2253 0.409 0.407 0.411

53-57 1346-1448 369 0.398 12.500 598.520 0.013 0.622 0.012 0.575 0.000 0.000 12.47 597.067 4489.581 214962.2921 0.399 0.397 0.401

* 46-53 1168-1346 368 0.290 25.821 1236.327 0.021 1.005 0.020 0.958 6.220 297.827 19.56 936.538 4509.141 215898.8299 0.462 0.460 0.464

43-46 1092-1168 367 0.523 7.432 355.830 0.008 0.383 0.008 0.383 0.000 0.000 7.414 354.984 4516.555 216253.8142 0.524 0.521 0.527

37-43 940-1092 366 0.391 18.966 908.099 0.015 0.718 0.016 0.766 0.000 0.000 18.93 906.373 4535.485 217160.1874 0.392 0.390 0.394

* 25-37 635-940 365 0.250 46.745 2238.170 0.023 1.101 0.028 1.341 4.024 192.678 42.67 2043.051 4578.155 219203.238 0.315 0.313 0.317

13-25 330-635 364 0.237 47.540 2276.215 0.014 0.670 0.024 1.149 0.000 0.000 47.49 2273.833 4625.645 221477.0714 0.238 0.237 0.239

* 0-13 0-330 363 0.057 63.670 3048.547 0.006 0.287 0.012 0.575 4.182 200.246 59.47 2847.439 4685.115 224324.5103 0.119 0.118 0.120

Results for RBHT Test 1637

Valid Time Period 7170 to 7270 seconds

Collapsed Liquid Level = 77.000 inches = 1955.81 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-143 Data Results for RBHT Test 1637

L for Time Period 7170 to 7270 seconds
A-432

Table A-144 Energy Balance Results for RBHT Test 1637L for Time Period 7170 to 7270 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.8251 5.4979 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.25 6.35 1839.6487 5.8033 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.50 12.70 1936.4723 6.1087 0.00E+00 0.00E+00 0.00E+00 1.67E-02 7.58E-03

0.75 19.05 2033.2959 6.4142 1.06E-02 1.44E-01 6.52E-02 1.65E-02 7.50E-03

1.00 25.40 2130.1196 6.7196 2.37E-02 3.20E-01 1.45E-01 1.63E-02 7.40E-03

1.25 31.75 2226.9432 7.0251 3.74E-02 5.05E-01 2.29E-01 1.61E-02 7.30E-03

1.50 38.10 2323.7668 7.3305 5.17E-02 6.98E-01 3.17E-01 1.59E-02 7.19E-03

1.75 44.45 2420.5904 7.6359 6.66E-02 9.00E-01 4.08E-01 1.56E-02 7.08E-03

2.00 50.80 2517.414 7.9414 8.22E-02 1.11E+00 5.03E-01 1.53E-02 6.96E-03

2.25 57.15 2614.2376 8.2468 9.83E-02 1.33E+00 6.02E-01 1.51E-02 6.84E-03

2.50 63.50 2711.0613 8.5522 1.15E-01 1.55E+00 7.04E-01 1.48E-02 6.71E-03

2.75 69.85 2807.8849 8.8577 1.32E-01 1.79E+00 8.11E-01 1.45E-02 6.58E-03

3.00 76.20 2904.7085 9.1631 1.50E-01 2.03E+00 9.20E-01 1.42E-02 6.44E-03

3.25 82.55 3001.5321 9.4685 1.69E-01 2.28E+00 1.03E+00 1.39E-02 6.30E-03

3.50 88.90 3098.3557 9.774 1.88E-01 2.54E+00 1.15E+00 1.36E-02 6.16E-03

3.75 95.25 3195.1793 10.079 2.08E-01 2.81E+00 1.27E+00 1.32E-02 6.01E-03

4.00 101.60 3292.003 10.385 2.28E-01 3.08E+00 1.40E+00 1.29E-02 5.85E-03

4.25 107.95 3388.8266 10.69 2.49E-01 3.36E+00 1.53E+00 1.26E-02 5.69E-03

4.50 114.30 3485.6502 10.996 2.71E-01 3.66E+00 1.66E+00 1.22E-02 5.53E-03

4.75 120.65 3582.4738 11.301 2.93E-01 3.96E+00 1.79E+00 1.18E-02 5.36E-03

5.00 127.00 3679.2974 11.607 3.16E-01 4.26E+00 1.93E+00 1.14E-02 5.19E-03

5.25 133.35 3776.121 11.912 3.39E-01 4.58E+00 2.08E+00 1.10E-02 5.01E-03

5.50 139.70 3872.9447 12.217 3.63E-01 4.90E+00 2.22E+00 1.06E-02 4.83E-03

5.75 146.05 3969.7683 12.523 3.88E-01 5.24E+00 2.38E+00 1.02E-02 4.64E-03

6.00 152.40 4066.5919 12.828 4.13E-01 5.58E+00 2.53E+00 9.81E-03 4.45E-03

6.25 158.75 4163.4155 13.134 4.39E-01 5.93E+00 2.69E+00 9.38E-03 4.25E-03

6.50 165.10 4260.2391 13.439 4.66E-01 6.29E+00 2.85E+00 8.93E-03 4.05E-03

6.75 171.45 4357.0627 13.745 4.93E-01 6.65E+00 3.02E+00 8.48E-03 3.85E-03

7.00 177.80 4453.8864 14.05 5.20E-01 7.03E+00 3.19E+00 8.02E-03 3.64E-03

7.25 184.15 4550.71 14.356 5.49E-01 7.41E+00 3.36E+00 7.54E-03 3.42E-03

7.50 190.50 4647.5336 14.661 5.78E-01 7.80E+00 3.54E+00 7.06E-03 3.20E-03

7.75 196.85 4744.3572 14.966 6.07E-01 8.20E+00 3.72E+00 6.57E-03 2.98E-03

8.00 203.20 4841.1808 15.272 6.37E-01 8.60E+00 3.90E+00 6.06E-03 2.75E-03

8.25 209.55 4938.0044 15.577 6.68E-01 9.02E+00 4.09E+00 5.55E-03 2.52E-03

8.50 215.90 5034.8281 15.883 6.99E-01 9.44E+00 4.28E+00 5.03E-03 2.28E-03

8.75 222.25 5131.6517 16.188 7.31E-01 9.87E+00 4.48E+00 4.49E-03 2.04E-03

9.00 228.60 5228.4753 16.494 7.64E-01 1.03E+01 4.68E+00 3.95E-03 1.79E-03

9.25 234.95 4938.0044 15.577 7.96E-01 1.07E+01 4.87E+00 3.41E-03 1.55E-03

9.50 241.30 4647.5336 14.661 8.26E-01 1.12E+01 5.06E+00 2.91E-03 1.32E-03

9.75 247.65 4357.0627 13.745 8.54E-01 1.15E+01 5.23E+00 2.44E-03 1.11E-03

10.00 254.00 4066.5919 12.828 8.81E-01 1.19E+01 5.39E+00 1.99E-03 9.05E-04

10.25 260.35 3776.121 11.912 9.05E-01 1.22E+01 5.54E+00 1.58E-03 7.18E-04

10.50 266.70 3485.6502 10.996 9.28E-01 1.25E+01 5.68E+00 1.20E-03 5.44E-04

10.75 273.05 3195.1793 10.079 9.49E-01 1.28E+01 5.81E+00 8.49E-04 3.85E-04

11.00 279.40 2904.7085 9.1631 9.68E-01 1.31E+01 5.93E+00 5.30E-04 2.40E-04

11.25 285.75 2614.2376 8.2468 9.86E-01 1.33E+01 6.04E+00 2.39E-04 1.08E-04

11.50 292.10 2323.7668 7.3305 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

11.75 298.45 2033.2959 6.4142 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

12.00 304.80 1742.8251 5.4979 1.00E+00 1.35E+01 6.12E+00 0.00E+00 0.00E+00

Results for RBHT Test 1637

Valid Time Period 7170 to 7270 seconds
A-433

Figure A-360 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637L for Time Period 7170 to 7270 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-434

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-M 

Test Conditions

Date: 6/20/2003

Steady-state time window: 7378 – 7589 seconds

Inlet flow rate: 0.376 cm/sec (0.148 in./sec) 

Inlet mass flow rate: 0.017 kg/sec (0.038 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-435

Figure A-361 Inlet Flow Plot for Experiment 1637M 

Figure A-362 Inlet Temperature Plot for Experiment 1637M 
A-436

Figure A-363 System Pressure Plot for Experiment 1637M 

Figure A-364 Bundle Power Plot for Experiment 1637M 
A-437

Table A-145: Data Results for RBHT Test 1637 for Time Period 7378 to 7589 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.863 7.806 373.733 0.029 1.389 0.000 0.000 0.000 0.000 7.772 372.125 4327.772 207214.8356 0.864 0.860 0.868

* 120-133 3048-3378 383 0.795 13.830 662.176 0.034 1.628 0.000 0.000 2.236 107.052 11.56 553.496 4339.332 207768.3314 0.829 0.825 0.833

* 108-120 2743-3048 382 0.660 21.199 1015.022 0.032 1.532 0.000 0.000 6.117 292.892 15.05 720.598 4354.382 208488.9292 0.758 0.754 0.762

100-108 2540-2743 381 0.722 11.550 553.015 0.035 1.676 0.016 0.766 0.000 0.000 11.5 550.623 4365.882 209039.5522 0.723 0.719 0.727

97-100 2464-2540 380 0.597 6.284 300.876 0.013 0.622 0.009 0.431 0.000 0.000 6.261 299.778 4372.143 209339.3305 0.598 0.595 0.601

93-97 2362-2464 379 0.601 8.294 397.107 0.018 0.862 0.012 0.575 0.000 0.000 8.262 395.587 4380.405 209734.9172 0.602 0.599 0.605

* 85-93 2159-2362 378 0.441 23.240 1112.744 0.033 1.580 0.024 1.149 8.543 409.048 14.64 700.967 4395.045 210435.8841 0.648 0.645 0.651

81-85 2057-2159 377 0.692 6.403 306.595 0.015 0.718 0.011 0.527 0.000 0.000 6.376 305.285 4401.421 210741.1686 0.693 0.690 0.696

78-81 1981-2057 376 0.641 5.588 267.556 0.011 0.527 0.008 0.383 0.000 0.000 5.565 266.454 4406.986 211007.6223 0.643 0.640 0.646

75-78 1905-1981 375 0.550 7.006 335.440 0.011 0.527 0.008 0.383 0.000 0.000 6.983 334.348 4413.969 211341.9701 0.552 0.549 0.555

72-75 1829-1905 374 0.499 7.811 373.982 0.010 0.479 0.008 0.383 0.000 0.000 7.791 373.035 4421.76 211715.0052 0.5 0.498 0.503

* 67-72 1702-1829 373 0.391 15.824 757.661 0.016 0.766 0.013 0.622 4.465 213.789 11.33 542.483 4433.09 212257.4885 0.564 0.561 0.567

63-67 1600-1702 372 0.626 7.764 371.744 0.012 0.575 0.010 0.479 0.000 0.000 7.74 370.593 4440.83 212628.0817 0.627 0.624 0.630

60-63 1524-1600 371 0.428 8.907 426.448 0.008 0.383 0.007 0.335 0.000 0.000 8.889 425.608 4449.719 213053.6893 0.429 0.427 0.431

57-60 1448-1524 370 0.413 9.151 438.135 0.008 0.383 0.007 0.335 0.000 0.000 9.135 437.386 4458.854 213491.0754 0.414 0.412 0.416

53-57 1346-1448 369 0.402 12.417 594.541 0.010 0.479 0.009 0.431 0.000 0.000 12.4 593.715 4471.254 214084.7906 0.403 0.401 0.405

* 46-53 1168-1346 368 0.290 25.806 1235.581 0.015 0.718 0.015 0.718 6.456 309.099 19.32 925.047 4490.574 215009.8372 0.468 0.466 0.470

43-46 1092-1168 367 0.533 7.276 348.370 0.006 0.287 0.006 0.287 0.000 0.000 7.261 347.659 4497.835 215357.4957 0.534 0.531 0.537

37-43 940-1092 366 0.405 18.545 887.958 0.011 0.527 0.012 0.575 0.000 0.000 18.52 886.742 4516.355 216244.2381 0.406 0.404 0.408

* 25-37 635-940 365 0.260 46.122 2208.331 0.017 0.814 0.021 1.005 4.404 210.863 41.68 1995.649 4558.035 218239.8872 0.331 0.329 0.333

13-25 330-635 364 0.256 46.376 2220.516 0.010 0.479 0.018 0.862 0.000 0.000 46.33 2218.292 4604.365 220458.1795 0.256 0.255 0.257

* 0-13 0-330 363 0.068 62.896 3011.497 0.005 0.239 0.011 0.527 4.040 193.456 58.84 2817.274 4663.205 223275.4538 0.128 0.127 0.129

 (Z2φ) Two-Phase Level (Dryout) = 139.50 inches = 3543.30 mm

 (S) Level Swell = 1.988

Results for RBHT Test 1637

Valid Time Period 7378 to 7589 seconds

Collapsed Liquid Level = 72.519 inches = 1841.98 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-145 Data Results for RBHT Test 1637

M for Time Period 7378 to 7589 seconds
A-438

Table A-146 Energy Balance Results for RBHT Test 1637M for Time Period 7378 to 7589 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.5295 5.5001 0.00E+00 0.00E+00 0.00E+00 1.23E-02 5.59E-03

0.25 6.35 1840.3922 5.8056 0.00E+00 0.00E+00 0.00E+00 1.23E-02 5.59E-03

0.50 12.70 1937.255 6.1112 6.84E-03 6.81E-02 3.09E-02 1.23E-02 5.56E-03

0.75 19.05 2034.1177 6.4168 2.38E-02 2.37E-01 1.07E-01 1.20E-02 5.46E-03

1.00 25.40 2130.9805 6.7223 4.15E-02 4.13E-01 1.87E-01 1.18E-02 5.36E-03

1.25 31.75 2227.8432 7.0279 6.01E-02 5.98E-01 2.71E-01 1.16E-02 5.26E-03

1.50 38.10 2324.706 7.3335 7.95E-02 7.91E-01 3.59E-01 1.14E-02 5.15E-03

1.75 44.45 2421.5687 7.639 9.97E-02 9.93E-01 4.50E-01 1.11E-02 5.04E-03

2.00 50.80 2518.4315 7.9446 1.21E-01 1.20E+00 5.45E-01 1.08E-02 4.92E-03

2.25 57.15 2615.2942 8.2501 1.43E-01 1.42E+00 6.44E-01 1.06E-02 4.80E-03

2.50 63.50 2712.157 8.5557 1.65E-01 1.65E+00 7.47E-01 1.03E-02 4.67E-03

2.75 69.85 2809.0197 8.8613 1.89E-01 1.88E+00 8.53E-01 1.00E-02 4.54E-03

3.00 76.20 2905.8825 9.1668 2.13E-01 2.12E+00 9.62E-01 9.71E-03 4.40E-03

3.25 82.55 3002.7452 9.4724 2.38E-01 2.37E+00 1.08E+00 9.40E-03 4.26E-03

3.50 88.90 3099.608 9.7779 2.64E-01 2.63E+00 1.19E+00 9.07E-03 4.12E-03

3.75 95.25 3196.4707 10.083 2.91E-01 2.90E+00 1.31E+00 8.74E-03 3.97E-03

4.00 101.60 3293.3335 10.389 3.19E-01 3.17E+00 1.44E+00 8.40E-03 3.81E-03

4.25 107.95 3390.1962 10.695 3.47E-01 3.46E+00 1.57E+00 8.05E-03 3.65E-03

4.50 114.30 3487.059 11 3.77E-01 3.75E+00 1.70E+00 7.69E-03 3.49E-03

4.75 120.65 3583.9217 11.306 4.07E-01 4.05E+00 1.84E+00 7.32E-03 3.32E-03

5.00 127.00 3680.7845 11.611 4.38E-01 4.36E+00 1.98E+00 6.94E-03 3.15E-03

5.25 133.35 3777.6472 11.917 4.69E-01 4.67E+00 2.12E+00 6.54E-03 2.97E-03

5.50 139.70 3874.51 12.222 5.02E-01 5.00E+00 2.27E+00 6.14E-03 2.79E-03

5.75 146.05 3971.3727 12.528 5.35E-01 5.33E+00 2.42E+00 5.73E-03 2.60E-03

6.00 152.40 4068.2355 12.834 5.70E-01 5.67E+00 2.57E+00 5.31E-03 2.41E-03

6.25 158.75 4165.0982 13.139 6.05E-01 6.02E+00 2.73E+00 4.88E-03 2.21E-03

6.50 165.10 4261.961 13.445 6.41E-01 6.38E+00 2.89E+00 4.43E-03 2.01E-03

6.75 171.45 4358.8237 13.75 6.77E-01 6.74E+00 3.06E+00 3.98E-03 1.81E-03

7.00 177.80 4455.6865 14.056 7.15E-01 7.12E+00 3.23E+00 3.52E-03 1.60E-03

7.25 184.15 4552.5492 14.361 7.53E-01 7.50E+00 3.40E+00 3.04E-03 1.38E-03

7.50 190.50 4649.412 14.667 7.92E-01 7.89E+00 3.58E+00 2.56E-03 1.16E-03

7.75 196.85 4746.2747 14.972 8.33E-01 8.29E+00 3.76E+00 2.07E-03 9.37E-04

8.00 203.20 4843.1375 15.278 8.73E-01 8.70E+00 3.94E+00 1.56E-03 7.09E-04

8.25 209.55 4940.0002 15.584 9.15E-01 9.11E+00 4.13E+00 1.05E-03 4.76E-04

8.50 215.90 5036.863 15.889 9.58E-01 9.53E+00 4.32E+00 5.24E-04 2.38E-04

8.75 222.25 5133.7257 16.195 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

9.00 228.60 5230.5885 16.5 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

9.25 234.95 4940.0002 15.584 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

9.50 241.30 4649.412 14.667 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

9.75 247.65 4358.8237 13.75 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

10.00 254.00 4068.2355 12.834 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

10.25 260.35 3777.6472 11.917 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

10.50 266.70 3487.059 11 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

10.75 273.05 3196.4707 10.083 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

11.00 279.40 2905.8825 9.1668 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

11.25 285.75 2615.2942 8.2501 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

11.50 292.10 2324.706 7.3335 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

11.75 298.45 2034.1177 6.4168 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

12.00 304.80 1743.5295 5.5001 1.00E+00 9.96E+00 4.52E+00 0.00E+00 0.00E+00

Results for RBHT Test 1637

Valid Time Period 7378 to 7589 seconds
A-439

Figure A-365 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637M for Time Period 7378 to 7589 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-440

RBHT Two-Phase Mixture Level and Uncovery Test INT-1637-N 

Test Conditions

Date: 6/20/2003

Steady-state time window: 7790 – 7937 seconds

Inlet flow rate: 0.381 cm/sec (0.150 in./sec) 

Inlet mass flow rate: 0.018 kg/sec (0.039 lbm/sec) 

Inlet flow temperature: 381.8 K (227.6 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.04 kW 
A-441

Figure A-366 Inlet Flow Plot for Experiment 1637N 

Figure A-367 Inlet Temperature Plot for Experiment 1637N 
A-442

Figure A-368 System Pressure Plot for Experiment 1637N 

Figure A-369 Bundle Power Plot for Experiment 1637N 
A-443

Table A-147: Data Results for RBHT Test 1637 for Time Period 7790 to 7937 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.992 0.436 20.887 0.030 1.436 0.000 0.000 0.000 0.000 0.408 19.535 4320.408 206862.2454 0.993 0.988 0.998

* 120-133 3048-3378 383 0.967 2.202 105.431 0.035 1.676 0.000 0.000 -1.679 -80.392 3.846 184.147 4324.254 207046.3929 0.943 0.938 0.948

* 108-120 2743-3048 382 0.853 9.192 440.125 0.033 1.580 0.000 0.000 -0.602 -28.815 9.761 467.359 4334.015 207513.752 0.843 0.839 0.847

100-108 2540-2743 381 0.792 8.637 413.518 0.037 1.772 0.020 0.958 0.000 0.000 8.578 410.717 4342.593 207924.4689 0.794 0.790 0.798

97-100 2464-2540 380 0.694 4.767 228.268 0.014 0.670 0.010 0.479 0.000 0.000 4.744 227.144 4347.337 208151.6128 0.695 0.692 0.698

93-97 2362-2464 379 0.679 6.673 319.525 0.018 0.862 0.013 0.622 0.000 0.000 6.639 317.877 4353.976 208469.4899 0.68 0.677 0.683

* 85-93 2159-2362 378 0.484 21.438 1026.460 0.034 1.628 0.024 1.149 7.640 365.808 13.74 657.875 4367.716 209127.3646 0.669 0.666 0.672

81-85 2057-2159 377 0.657 7.125 341.159 0.016 0.766 0.012 0.575 0.000 0.000 7.097 339.806 4374.813 209467.1708 0.658 0.655 0.661

78-81 1981-2057 376 0.599 6.248 299.136 0.011 0.527 0.008 0.383 0.000 0.000 6.225 298.055 4381.038 209765.2254 0.6 0.597 0.603

75-78 1905-1981 375 0.512 7.603 364.035 0.011 0.527 0.008 0.383 0.000 0.000 7.582 363.028 4388.62 210128.2535 0.513 0.510 0.516

72-75 1829-1905 374 0.452 8.538 408.794 0.010 0.479 0.008 0.383 0.000 0.000 8.518 407.844 4397.138 210536.0975 0.453 0.451 0.455

* 67-72 1702-1829 373 0.361 16.598 794.711 0.016 0.766 0.013 0.622 3.909 187.158 12.66 606.164 4409.798 211142.2616 0.512 0.509 0.515

63-67 1600-1702 372 0.571 8.917 426.946 0.012 0.575 0.010 0.479 0.000 0.000 8.893 425.799 4418.691 211568.0607 0.572 0.569 0.575

60-63 1524-1600 371 0.386 9.566 458.028 0.008 0.383 0.007 0.335 0.000 0.000 9.545 457.017 4428.236 212025.0777 0.387 0.385 0.389

57-60 1448-1524 370 0.380 9.660 462.504 0.008 0.383 0.007 0.335 0.000 0.000 9.642 461.661 4437.878 212486.7392 0.381 0.379 0.383

53-57 1346-1448 369 0.369 13.103 627.364 0.010 0.479 0.009 0.431 0.000 0.000 13.08 626.274 4450.958 213113.0129 0.37 0.368 0.372

* 46-53 1168-1346 368 0.267 26.642 1275.615 0.016 0.766 0.015 0.718 5.811 278.222 20.8 995.909 4471.758 214108.9223 0.428 0.426 0.430

43-46 1092-1168 367 0.484 8.034 384.674 0.006 0.287 0.006 0.287 0.000 0.000 8.02 384.000 4479.778 214492.9219 0.485 0.483 0.487

37-43 940-1092 366 0.369 19.672 941.916 0.011 0.527 0.012 0.575 0.000 0.000 19.64 940.368 4499.418 215433.2902 0.369 0.367 0.371

* 25-37 635-940 365 0.260 46.138 2209.077 0.017 0.814 0.021 1.005 3.190 152.716 42.91 2054.542 4542.328 217487.832 0.311 0.309 0.313

13-25 330-635 364 0.253 46.569 2229.716 0.011 0.527 0.018 0.862 0.000 0.000 46.52 2227.390 4588.848 219715.2216 0.253 0.252 0.254

* 0-13 0-330 363 0.068 62.948 3013.983 0.005 0.239 0.011 0.527 3.982 190.676 58.95 2822.541 4647.798 222537.7627 0.127 0.126 0.128

 (Z2φ) Two-Phase Level (Dryout) = 120.90 inches = 3070.86 mm

 (S) Level Swell = 1.909

Results for RBHT Test 1637

Valid Time Period 7790 to 7937 seconds

Collapsed Liquid Level = 65.604 inches = 1666.35 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-147 Data Results for RBHT Test 1637

N for Time Period 7790 to 7937 seconds
A-444

Table A-148 Energy Balance Results for RBHT Test 1637N for Time Period 7790 to 7937 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.6499 5.5005 0.00E+00 0.00E+00 0.00E+00 1.25E-02 5.68E-03

0.25 6.35 1840.5194 5.806 0.00E+00 0.00E+00 0.00E+00 1.25E-02 5.68E-03

0.50 12.70 1937.3888 6.1116 6.43E-03 6.54E-02 2.97E-02 1.24E-02 5.65E-03

0.75 19.05 2034.2583 6.4172 2.31E-02 2.35E-01 1.06E-01 1.22E-02 5.55E-03

1.00 25.40 2131.1277 6.7228 4.05E-02 4.12E-01 1.87E-01 1.20E-02 5.45E-03

1.25 31.75 2227.9972 7.0284 5.88E-02 5.98E-01 2.71E-01 1.18E-02 5.35E-03

1.50 38.10 2324.8666 7.334 7.79E-02 7.92E-01 3.59E-01 1.16E-02 5.24E-03

1.75 44.45 2421.736 7.6395 9.78E-02 9.95E-01 4.51E-01 1.13E-02 5.13E-03

2.00 50.80 2518.6055 7.9451 1.19E-01 1.21E+00 5.47E-01 1.10E-02 5.01E-03

2.25 57.15 2615.4749 8.2507 1.40E-01 1.42E+00 6.46E-01 1.08E-02 4.89E-03

2.50 63.50 2712.3444 8.5563 1.62E-01 1.65E+00 7.49E-01 1.05E-02 4.76E-03

2.75 69.85 2809.2138 8.8619 1.86E-01 1.89E+00 8.56E-01 1.02E-02 4.63E-03

3.00 76.20 2906.0832 9.1674 2.10E-01 2.13E+00 9.67E-01 9.90E-03 4.49E-03

3.25 82.55 3002.9527 9.473 2.34E-01 2.38E+00 1.08E+00 9.59E-03 4.35E-03

3.50 88.90 3099.8221 9.7786 2.60E-01 2.64E+00 1.20E+00 9.27E-03 4.21E-03

3.75 95.25 3196.6916 10.084 2.86E-01 2.91E+00 1.32E+00 8.94E-03 4.06E-03

4.00 101.60 3293.561 10.39 3.14E-01 3.19E+00 1.45E+00 8.60E-03 3.90E-03

4.25 107.95 3390.4305 10.695 3.42E-01 3.47E+00 1.58E+00 8.25E-03 3.74E-03

4.50 114.30 3487.2999 11.001 3.70E-01 3.77E+00 1.71E+00 7.89E-03 3.58E-03

4.75 120.65 3584.1693 11.307 4.00E-01 4.07E+00 1.85E+00 7.52E-03 3.41E-03

5.00 127.00 3681.0388 11.612 4.30E-01 4.38E+00 1.99E+00 7.14E-03 3.24E-03

5.25 133.35 3777.9082 11.918 4.62E-01 4.70E+00 2.13E+00 6.74E-03 3.06E-03

5.50 139.70 3874.7777 12.223 4.94E-01 5.02E+00 2.28E+00 6.34E-03 2.88E-03

5.75 146.05 3971.6471 12.529 5.27E-01 5.36E+00 2.43E+00 5.93E-03 2.69E-03

6.00 152.40 4068.5165 12.834 5.60E-01 5.70E+00 2.59E+00 5.51E-03 2.50E-03

6.25 158.75 4165.386 13.14 5.95E-01 6.05E+00 2.74E+00 5.07E-03 2.30E-03

6.50 165.10 4262.2554 13.446 6.30E-01 6.41E+00 2.91E+00 4.63E-03 2.10E-03

6.75 171.45 4359.1249 13.751 6.66E-01 6.78E+00 3.07E+00 4.18E-03 1.90E-03

7.00 177.80 4455.9943 14.057 7.03E-01 7.15E+00 3.25E+00 3.72E-03 1.69E-03

7.25 184.15 4552.8638 14.362 7.41E-01 7.54E+00 3.42E+00 3.24E-03 1.47E-03

7.50 190.50 4649.7332 14.668 7.80E-01 7.93E+00 3.60E+00 2.76E-03 1.25E-03

7.75 196.85 4746.6026 14.973 8.19E-01 8.33E+00 3.78E+00 2.27E-03 1.03E-03

8.00 203.20 4843.4721 15.279 8.59E-01 8.74E+00 3.96E+00 1.76E-03 8.00E-04

8.25 209.55 4940.3415 15.585 9.00E-01 9.16E+00 4.15E+00 1.25E-03 5.67E-04

8.50 215.90 5037.211 15.89 9.42E-01 9.58E+00 4.35E+00 7.25E-04 3.29E-04

8.75 222.25 5134.0804 16.196 9.85E-01 1.00E+01 4.54E+00 1.90E-04 8.64E-05

9.00 228.60 5230.9498 16.501 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

9.25 234.95 4940.3415 15.585 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

9.50 241.30 4649.7332 14.668 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

9.75 247.65 4359.1249 13.751 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

10.00 254.00 4068.5165 12.834 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

10.25 260.35 3777.9082 11.918 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

10.50 266.70 3487.2999 11.001 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

10.75 273.05 3196.6916 10.084 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

11.00 279.40 2906.0832 9.1674 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

11.25 285.75 2615.4749 8.2507 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

11.50 292.10 2324.8666 7.334 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

11.75 298.45 2034.2583 6.4172 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

12.00 304.80 1743.6499 5.5005 1.00E+00 1.02E+01 4.61E+00 0.00E+00 0.00E+00

Results for RBHT Test 1637

Valid Time Period 7790 to 7937 seconds
A-445

Figure A-370 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1637N for Time Period 7790 to 7937 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-446

RBHT Two-Phase Mixture Level and Uncovery Test INT-1647-A 

Test Conditions

Date: 6/24/2003

Steady-state time window: 2835 – 2919 seconds

Inlet flow rate: 2.537 cm/sec (0.999 in./sec) 

Inlet mass flow rate: 0.118 kg/sec (0.260 lbm/sec) 

Inlet flow temperature: 369.5 K (205.4 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 80.95 kW 
A-447

Figure A-371 Inlet Flow Plot for Experiment 1647A 

Figure A-372 Inlet Temperature Plot for Experiment 1647A 
A-448

Figure A-373 System Pressure Plot for Experiment 1647A 

Figure A-374 Bundle Power Plot for Experiment 1647A 
A-449

Table A-149: Data Results for RBHT Test 1647 for Time Period 2835 to 2919 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.718 16.136 772.580 0.704 33.708 0.164 7.852 0.000 0.000 15.26 730.653 4335.26 207573.363 0.733 0.729 0.737

* 120-133 3048-3378 383 0.712 19.428 930.229 0.779 37.299 0.292 13.981 0.417 19.978 17.94 858.972 4353.2 208432.3348 0.734 0.730 0.738

* 108-120 2743-3048 382 0.641 22.404 1072.711 0.647 30.979 0.364 17.428 5.023 240.504 16.37 783.800 4369.57 209216.1346 0.737 0.733 0.741

100-108 2540-2743 381 0.723 11.508 551.026 0.385 18.434 0.267 12.784 0.000 0.000 10.85 519.501 4380.42 209735.6354 0.739 0.735 0.743

97-100 2464-2540 380 0.612 6.050 289.687 0.134 6.416 0.096 4.597 0.000 0.000 5.82 278.663 4386.24 210014.2985 0.626 0.623 0.629

93-97 2362-2464 379 0.611 8.086 387.160 0.170 8.140 0.126 6.033 0.000 0.000 7.786 372.796 4394.026 210387.0941 0.625 0.622 0.628

* 85-93 2159-2362 378 0.457 22.570 1080.668 0.311 14.891 0.241 11.539 7.718 369.550 14.3 684.688 4408.326 211071.7818 0.656 0.653 0.659

81-85 2057-2159 377 0.674 6.777 324.499 0.141 6.751 0.116 5.554 0.000 0.000 6.516 311.988 4414.842 211383.7696 0.686 0.683 0.68978-81 1981-2057 376 0.549 7.027 336.434 0.100 4.788 0.084 4.022 0.000 0.000 6.839 327.453 4421.681 211711.2227 0.561 0.558 0.56475-78 1905-1981 375 0.546 7.079 338.921 0.094 4.501 0.083 3.974 0.000 0.000 6.901 330.422 4428.582 212041.6443 0.557 0.554 0.56072-75 1829-1905 374 0.425 8.958 428.935 0.089 4.261 0.081 3.878 0.000 0.000 8.785 420.628 4437.367 212462.2724 0.436 0.434 0.438

* 67-72 1702-1829 373 0.405 15.461 740.255 0.136 6.512 0.130 6.224 2.425 116.088 12.77 611.431 4450.137 213073.7032 0.508 0.505 0.511

63-67 1600-1702 372 0.571 8.912 426.697 0.098 4.692 0.100 4.788 0.000 0.000 8.712 417.133 4458.849 213490.836 0.581 0.578 0.58460-63 1524-1600 371 0.401 9.332 446.838 0.067 3.208 0.073 3.495 0.000 0.000 9.189 439.972 4468.038 213930.8077 0.41 0.408 0.41257-60 1448-1524 370 0.379 9.675 463.250 0.062 2.969 0.071 3.399 0.000 0.000 9.539 456.730 4477.577 214387.5375 0.388 0.386 0.39053-57 1346-1448 369 0.350 13.503 646.511 0.074 3.543 0.092 4.405 0.000 0.000 13.33 638.244 4490.907 215025.7813 0.358 0.356 0.360

* 46-53 1168-1346 368 0.251 27.239 1304.211 0.104 4.980 0.153 7.326 3.132 149.962 23.85 1141.944 4514.757 216167.7255 0.344 0.342 0.346

43-46 1092-1168 367 0.323 10.542 504.776 0.034 1.628 0.062 2.969 0.000 0.000 10.44 499.870 4525.197 216667.5953 0.33 0.328 0.33237-43 940-1092 366 0.141 26.782 1282.329 0.047 2.250 0.119 5.698 0.000 0.000 26.61 1274.094 4551.807 217941.689 0.146 0.145 0.147

* 25-37 635-940 365 0.058 58.731 2812.073 0.038 1.819 0.056 2.681 2.297 109.999 56.34 2697.574 4608.147 220639.2627 0.096 0.091 0.101

13-25 330-635 364 0.045 59.500 2848.874 0.004 0.192 0.000 0.000 0.000 0.000 59.48 2847.918 4667.627 223487.1803 0.045 0.043 0.047

* 0-13 0-330 363 0.035 65.135 3118.668 0.004 0.192 0.000 0.000 -0.829 -39.705 65.96 3158.182 4733.587 226645.3621 0.023 0.022 0.024

Results for RBHT Test 1647

Valid Time Period 2835 to 2919 seconds

Collapsed Liquid Level = 84.610 inches = 2149.08 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-149 Data Results for RBHT Test 1647

A for Time Period 2835 to 2919 seconds
A-450

Table A-150 Energy Balance Results for RBHT Test 1647A for Time Period 2835 to 2919 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2611.7973 8.2391 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

0.25 6.35 2756.8972 8.6968 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

0.50 12.70 2901.997 9.1546 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

0.75 19.05 3047.0969 9.6123 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

1.00 25.40 3192.1967 10.07 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

1.25 31.75 3337.2966 10.528 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

1.50 38.10 3482.3964 10.985 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

1.75 44.45 3627.4963 11.443 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

2.00 50.80 3772.5961 11.901 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

2.25 57.15 3917.696 12.359 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

2.50 63.50 4062.7959 12.816 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

2.75 69.85 4207.8957 13.274 0.00E+00 0.00E+00 0.00E+00 8.42E-02 3.82E-02

3.00 76.20 4352.9956 13.732 3.55E-03 2.42E-01 1.10E-01 8.39E-02 3.81E-02

3.25 82.55 4498.0954 14.19 9.07E-03 6.18E-01 2.80E-01 8.35E-02 3.79E-02

3.50 88.90 4643.1953 14.647 1.48E-02 1.01E+00 4.56E-01 8.30E-02 3.76E-02

3.75 95.25 4788.2951 15.105 2.07E-02 1.41E+00 6.38E-01 8.25E-02 3.74E-02

4.00 101.60 4933.395 15.563 2.67E-02 1.82E+00 8.25E-01 8.20E-02 3.72E-02

4.25 107.95 5078.4948 16.02 3.30E-02 2.24E+00 1.02E+00 8.15E-02 3.69E-02

4.50 114.30 5223.5947 16.478 3.94E-02 2.68E+00 1.22E+00 8.09E-02 3.67E-02

4.75 120.65 5368.6945 16.936 4.60E-02 3.13E+00 1.42E+00 8.04E-02 3.64E-02

5.00 127.00 5513.7944 17.394 5.28E-02 3.59E+00 1.63E+00 7.98E-02 3.62E-02

5.25 133.35 5658.8942 17.851 5.98E-02 4.07E+00 1.85E+00 7.92E-02 3.59E-02

5.50 139.70 5803.9941 18.309 6.69E-02 4.56E+00 2.07E+00 7.86E-02 3.56E-02

5.75 146.05 5949.0939 18.767 7.42E-02 5.05E+00 2.29E+00 7.80E-02 3.54E-02

6.00 152.40 6094.1938 19.225 8.18E-02 5.57E+00 2.52E+00 7.73E-02 3.51E-02

6.25 158.75 6239.2936 19.682 8.94E-02 6.09E+00 2.76E+00 7.67E-02 3.48E-02

6.50 165.10 6384.3935 20.14 9.73E-02 6.63E+00 3.01E+00 7.60E-02 3.45E-02

6.75 171.45 6529.4933 20.598 1.05E-01 7.18E+00 3.26E+00 7.54E-02 3.42E-02

7.00 177.80 6674.5932 21.055 1.14E-01 7.73E+00 3.51E+00 7.47E-02 3.39E-02

7.25 184.15 6819.693 21.513 1.22E-01 8.31E+00 3.77E+00 7.40E-02 3.35E-02

7.50 190.50 6964.7929 21.971 1.31E-01 8.89E+00 4.03E+00 7.32E-02 3.32E-02

7.75 196.85 7109.8927 22.429 1.39E-01 9.49E+00 4.31E+00 7.25E-02 3.29E-02

8.00 203.20 7254.9926 22.886 1.48E-01 1.01E+01 4.58E+00 7.17E-02 3.25E-02

8.25 209.55 7400.0924 23.344 1.58E-01 1.07E+01 4.86E+00 7.10E-02 3.22E-02

8.50 215.90 7545.1923 23.802 1.67E-01 1.14E+01 5.15E+00 7.02E-02 3.18E-02

8.75 222.25 7690.2921 24.26 1.76E-01 1.20E+01 5.44E+00 6.94E-02 3.15E-02

9.00 228.60 7835.392 24.717 1.86E-01 1.27E+01 5.74E+00 6.86E-02 3.11E-02

9.25 234.95 7400.0924 23.344 1.96E-01 1.33E+01 6.04E+00 6.78E-02 3.07E-02

9.50 241.30 6964.7929 21.971 2.05E-01 1.39E+01 6.32E+00 6.70E-02 3.04E-02

9.75 247.65 6529.4933 20.598 2.13E-01 1.45E+01 6.58E+00 6.63E-02 3.01E-02

10.00 254.00 6094.1938 19.225 2.21E-01 1.50E+01 6.82E+00 6.56E-02 2.98E-02

10.25 260.35 5658.8942 17.851 2.28E-01 1.55E+01 7.04E+00 6.50E-02 2.95E-02

10.50 266.70 5223.5947 16.478 2.35E-01 1.60E+01 7.25E+00 6.44E-02 2.92E-02

10.75 273.05 4788.2951 15.105 2.41E-01 1.64E+01 7.45E+00 6.39E-02 2.90E-02

11.00 279.40 4352.9956 13.732 2.47E-01 1.68E+01 7.62E+00 6.34E-02 2.88E-02

11.25 285.75 3917.696 12.359 2.52E-01 1.72E+01 7.78E+00 6.30E-02 2.86E-02

11.50 292.10 3482.3964 10.985 2.57E-01 1.75E+01 7.92E+00 6.26E-02 2.84E-02

11.75 298.45 3047.0969 9.6123 2.61E-01 1.78E+01 8.05E+00 6.23E-02 2.82E-02

12.00 304.80 2611.7973 8.2391 2.64E-01 1.80E+01 8.16E+00 6.20E-02 2.81E-02

Results for RBHT Test 1647

Valid Time Period 2835 to 2919 seconds
A-451

Figure A-375 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1647A for Time Period 2835 to 2919 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-452

RBHT Two-Phase Mixture Level and Uncovery Test INT-1647-B 

Test Conditions

Date: 6/24/2003

Steady-state time window: 3030 – 3132 seconds

Inlet flow rate: 2.543 cm/sec (1.001 in./sec) 

Inlet mass flow rate: 0.119 kg/sec (0.262 lbm/sec) 

Inlet flow temperature: 369.5 K (205.4 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 80.95 kW 
A-453

Figure A-376 Inlet Flow Plot for Experiment 1647B 

Figure A-377 Inlet Temperature Plot for Experiment 1647B 
A-454

Figure A-378 System Pressure Plot for Experiment 1647B 

Figure A-379 Bundle Power Plot for Experiment 1647B 
A-455

Table A-151: Data Results for RBHT Test 1647 for Time Period 3030 to 3132 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.718 16.120 771.834 0.713 34.139 0.165 7.900 0.000 0.000 15.24 729.695 4335.24 207572.4054 0.733 0.729 0.737

* 120-133 3048-3378 383 0.712 19.423 929.981 0.788 37.730 0.295 14.125 0.270 12.930 18.07 865.196 4353.31 208437.6016 0.732 0.728 0.736

* 108-120 2743-3048 382 0.632 22.934 1098.074 0.655 31.362 0.368 17.620 5.131 245.661 16.78 803.431 4370.09 209241.0323 0.731 0.727 0.735

100-108 2540-2743 381 0.714 11.888 569.178 0.389 18.625 0.269 12.880 0.000 0.000 11.23 537.695 4381.32 209778.7276 0.73 0.726 0.734

97-100 2464-2540 380 0.598 6.263 299.882 0.136 6.512 0.097 4.644 0.000 0.000 6.028 288.622 4387.348 210067.3498 0.613 0.610 0.616

93-97 2362-2464 379 0.607 8.169 391.139 0.172 8.235 0.127 6.081 0.000 0.000 7.866 376.626 4395.214 210443.9759 0.621 0.618 0.624

* 85-93 2159-2362 378 0.449 22.882 1095.587 0.315 15.082 0.244 11.683 7.843 375.516 14.48 693.306 4409.694 211137.282 0.652 0.649 0.655

81-85 2057-2159 377 0.669 6.871 328.975 0.143 6.847 0.117 5.602 0.000 0.000 6.609 316.441 4416.303 211453.7226 0.682 0.679 0.68578-81 1981-2057 376 0.541 7.151 342.402 0.101 4.836 0.085 4.070 0.000 0.000 6.962 333.342 4423.265 211787.065 0.553 0.550 0.55675-78 1905-1981 375 0.532 7.291 349.116 0.095 4.549 0.083 3.974 0.000 0.000 7.108 340.333 4430.373 212127.3978 0.544 0.541 0.54772-75 1829-1905 374 0.439 8.735 418.243 0.090 4.309 0.082 3.926 0.000 0.000 8.56 409.855 4438.933 212537.2528 0.45 0.448 0.452

* 67-72 1702-1829 373 0.398 15.632 748.461 0.138 6.607 0.132 6.320 2.562 122.666 12.8 612.867 4451.733 213150.1201 0.507 0.504 0.510

63-67 1600-1702 372 0.554 9.275 444.103 0.100 4.788 0.101 4.836 0.000 0.000 9.073 434.418 4460.806 213584.5377 0.563 0.560 0.56660-63 1524-1600 371 0.394 9.436 451.812 0.068 3.256 0.074 3.543 0.000 0.000 9.292 444.903 4470.098 214029.4411 0.403 0.401 0.40557-60 1448-1524 370 0.372 9.779 468.223 0.063 3.016 0.072 3.447 0.000 0.000 9.64 461.566 4479.738 214491.0067 0.381 0.379 0.38353-57 1346-1448 369 0.344 13.632 652.727 0.075 3.591 0.093 4.453 0.000 0.000 13.46 644.468 4493.198 215135.475 0.352 0.350 0.354

* 46-53 1168-1346 368 0.248 27.353 1309.682 0.106 5.075 0.154 7.374 2.973 142.361 24.12 1154.872 4517.318 216290.3468 0.336 0.334 0.338

43-46 1092-1168 367 0.315 10.677 511.241 0.035 1.676 0.063 3.016 0.000 0.000 10.57 506.094 4527.888 216796.4411 0.321 0.319 0.32337-43 940-1092 366 0.153 26.398 1263.928 0.048 2.298 0.120 5.746 0.000 0.000 26.22 1255.420 4554.108 218051.8614 0.158 0.157 0.159

* 25-37 635-940 365 0.056 58.809 2815.803 0.039 1.867 0.059 2.825 2.761 132.210 55.95 2678.900 4610.058 220730.7618 0.102 0.101 0.103

13-25 330-635 364 0.046 59.484 2848.128 0.004 0.192 0.000 0.000 0.000 0.000 59.46 2846.960 4669.518 223577.7219 0.046 0.044 0.048

* 0-13 0-330 363 0.035 65.135 3118.668 0.004 0.192 0.000 0.000 -0.819 -39.226 65.95 3157.703 4735.468 226735.4249 0.023 0.022 0.024

Results for RBHT Test 1647

Valid Time Period 3030 to 3132 seconds

Collapsed Liquid Level = 84.299 inches = 2141.18 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-151 Data Results for RBHT Test 1647

B for Time Period 3030 to 3132 seconds
A-456

Table A-152 Energy Balance Results for RBHT Test 1647B for Time Period 3030 to 3132 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2612.0543 8.2399 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

0.25 6.35 2757.1684 8.6977 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

0.50 12.70 2902.2826 9.1555 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

0.75 19.05 3047.3967 9.6132 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

1.00 25.40 3192.5108 10.071 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

1.25 31.75 3337.625 10.529 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

1.50 38.10 3482.7391 10.987 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

1.75 44.45 3627.8532 11.444 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

2.00 50.80 3772.9673 11.902 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

2.25 57.15 3918.0815 12.36 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

2.50 63.50 4063.1956 12.818 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

2.75 69.85 4208.3097 13.275 0.00E+00 0.00E+00 0.00E+00 8.51E-02 3.86E-02

3.00 76.20 4353.4238 13.733 3.68E-03 2.53E-01 1.15E-01 8.48E-02 3.84E-02

3.25 82.55 4498.538 14.191 9.15E-03 6.29E-01 2.85E-01 8.43E-02 3.82E-02

3.50 88.90 4643.6521 14.649 1.48E-02 1.02E+00 4.61E-01 8.38E-02 3.80E-02

3.75 95.25 4788.7662 15.107 2.06E-02 1.42E+00 6.43E-01 8.33E-02 3.78E-02

4.00 101.60 4933.8804 15.564 2.66E-02 1.83E+00 8.31E-01 8.28E-02 3.76E-02

4.25 107.95 5078.9945 16.022 3.28E-02 2.26E+00 1.02E+00 8.23E-02 3.73E-02

4.50 114.30 5224.1086 16.48 3.92E-02 2.69E+00 1.22E+00 8.17E-02 3.71E-02

4.75 120.65 5369.2227 16.938 4.57E-02 3.14E+00 1.43E+00 8.12E-02 3.68E-02

5.00 127.00 5514.3369 17.395 5.24E-02 3.61E+00 1.64E+00 8.06E-02 3.66E-02

5.25 133.35 5659.451 17.853 5.93E-02 4.08E+00 1.85E+00 8.00E-02 3.63E-02

5.50 139.70 5804.5651 18.311 6.64E-02 4.57E+00 2.07E+00 7.94E-02 3.60E-02

5.75 146.05 5949.6793 18.769 7.37E-02 5.07E+00 2.30E+00 7.88E-02 3.57E-02

6.00 152.40 6094.7934 19.226 8.11E-02 5.58E+00 2.53E+00 7.82E-02 3.55E-02

6.25 158.75 6239.9075 19.684 8.87E-02 6.10E+00 2.77E+00 7.75E-02 3.52E-02

6.50 165.10 6385.0216 20.142 9.65E-02 6.64E+00 3.01E+00 7.69E-02 3.49E-02

6.75 171.45 6530.1358 20.6 1.05E-01 7.19E+00 3.26E+00 7.62E-02 3.46E-02

7.00 177.80 6675.2499 21.058 1.13E-01 7.75E+00 3.52E+00 7.55E-02 3.42E-02

7.25 184.15 6820.364 21.515 1.21E-01 8.32E+00 3.78E+00 7.48E-02 3.39E-02

7.50 190.50 6965.4782 21.973 1.30E-01 8.91E+00 4.04E+00 7.41E-02 3.36E-02

7.75 196.85 7110.5923 22.431 1.38E-01 9.51E+00 4.31E+00 7.33E-02 3.33E-02

8.00 203.20 7255.7064 22.889 1.47E-01 1.01E+01 4.59E+00 7.26E-02 3.29E-02

8.25 209.55 7400.8205 23.346 1.56E-01 1.07E+01 4.87E+00 7.18E-02 3.26E-02

8.50 215.90 7545.9347 23.804 1.65E-01 1.14E+01 5.16E+00 7.10E-02 3.22E-02

8.75 222.25 7691.0488 24.262 1.75E-01 1.20E+01 5.45E+00 7.02E-02 3.18E-02

9.00 228.60 7836.1629 24.72 1.84E-01 1.27E+01 5.75E+00 6.94E-02 3.15E-02

9.25 234.95 7400.8205 23.346 1.94E-01 1.33E+01 6.05E+00 6.86E-02 3.11E-02

9.50 241.30 6965.4782 21.973 2.03E-01 1.39E+01 6.32E+00 6.78E-02 3.08E-02

9.75 247.65 6530.1358 20.6 2.11E-01 1.45E+01 6.58E+00 6.71E-02 3.04E-02

10.00 254.00 6094.7934 19.226 2.19E-01 1.51E+01 6.83E+00 6.65E-02 3.01E-02

10.25 260.35 5659.451 17.853 2.26E-01 1.55E+01 7.05E+00 6.58E-02 2.99E-02

10.50 266.70 5224.1086 16.48 2.33E-01 1.60E+01 7.26E+00 6.53E-02 2.96E-02

10.75 273.05 4788.7662 15.107 2.39E-01 1.64E+01 7.45E+00 6.47E-02 2.94E-02

11.00 279.40 4353.4238 13.733 2.45E-01 1.68E+01 7.63E+00 6.43E-02 2.91E-02

11.25 285.75 3918.0815 12.36 2.50E-01 1.72E+01 7.79E+00 6.38E-02 2.90E-02

11.50 292.10 3482.7391 10.987 2.54E-01 1.75E+01 7.93E+00 6.34E-02 2.88E-02

11.75 298.45 3047.3967 9.6132 2.58E-01 1.78E+01 8.06E+00 6.31E-02 2.86E-02

12.00 304.80 2612.0543 8.2399 2.62E-01 1.80E+01 8.17E+00 6.28E-02 2.85E-02

Results for RBHT Test 1647

Valid Time Period 3030 to 3132 seconds
A-457

Figure A-380 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1647B for Time Period 3030 to 3132 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-458

RBHT Two-Phase Mixture Level and Uncovery Test INT-1647-C 

Test Conditions

Date: 6/24/2003

Steady-state time window: 3525 – 3616 seconds

Inlet flow rate: 2.540 cm/sec (1.000 in./sec) 

Inlet mass flow rate: 0.118 kg/sec (0.260 lbm/sec) 

Inlet flow temperature: 369.9 K (206.1 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 53.82 kW 
A-459

Figure A-381 Inlet Flow Plot for Experiment 1647C 

Figure A-382 Inlet Temperature Plot for Experiment 1647C 
A-460

Figure A-383 System Pressure Plot for Experiment 1647C 

Figure A-384 Bundle Power Plot for Experiment 1647C 
A-461

Table A-153: Data Results for RBHT Test 1647 for Time Period 3525 to 3616 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.542 26.174 1253.236 0.492 23.557 0.109 5.219 0.000 0.000 25.56 1223.819 4345.56 208066.5296 0.552 0.549 0.555

* 120-133 3048-3378 383 0.611 26.232 1255.971 0.543 25.999 0.195 9.337 -4.376 -209.547 29.87 1430.183 4375.43 209496.7129 0.558 0.555 0.561

* 108-120 2743-3048 382 0.494 31.555 1510.846 0.449 21.498 0.243 11.635 3.933 188.297 26.93 1289.415 4402.36 210786.1282 0.568 0.565 0.571

100-108 2540-2743 381 0.562 18.187 870.800 0.264 12.640 0.178 8.523 0.000 0.000 17.74 849.396 4420.1 211635.524 0.573 0.570 0.576

97-100 2464-2540 380 0.430 8.875 424.956 0.091 4.357 0.064 3.064 0.000 0.000 8.715 417.276 4428.815 212052.8004 0.441 0.439 0.443

93-97 2362-2464 379 0.456 11.306 541.328 0.115 5.506 0.084 4.022 0.000 0.000 11.1 531.471 4439.915 212584.2713 0.465 0.463 0.467

* 85-93 2159-2362 378 0.365 26.387 1263.431 0.208 9.959 0.161 7.709 5.128 245.545 20.89 1000.219 4460.805 213584.4898 0.497 0.495 0.499

81-85 2057-2159 377 0.521 9.961 476.926 0.092 4.405 0.077 3.687 0.000 0.000 9.79 468.748 4470.595 214053.2375 0.529 0.526 0.532

78-81 1981-2057 376 0.393 9.457 452.806 0.064 3.064 0.056 2.681 0.000 0.000 9.334 446.914 4479.929 214500.1519 0.401 0.399 0.403

75-78 1905-1981 375 0.374 9.758 467.228 0.060 2.873 0.055 2.633 0.000 0.000 9.641 461.614 4489.57 214961.7654 0.381 0.379 0.383

72-75 1829-1905 374 0.279 11.238 538.096 0.056 2.681 0.054 2.586 0.000 0.000 11.12 532.428 4500.69 215494.1939 0.286 0.285 0.287

* 67-72 1702-1829 373 0.311 17.886 856.378 0.083 3.974 0.087 4.166 0.116 5.546 17.6 842.693 4518.29 216336.8864 0.322 0.320 0.324

63-67 1600-1702 372 0.352 13.461 644.521 0.057 2.729 0.067 3.208 0.000 0.000 13.33 638.244 4531.62 216975.1302 0.358 0.356 0.360

60-63 1524-1600 371 0.245 11.763 563.210 0.037 1.772 0.049 2.346 0.000 0.000 11.68 559.241 4543.3 217534.3716 0.25 0.249 0.251

57-60 1448-1524 370 0.225 12.069 577.881 0.032 1.532 0.047 2.250 0.000 0.000 11.99 574.084 4555.29 218108.4559 0.23 0.229 0.231

53-57 1346-1448 369 0.142 17.829 853.643 0.034 1.628 0.061 2.921 0.000 0.000 17.73 848.917 4573.02 218957.3729 0.146 0.145 0.147

* 46-53 1168-1346 368 0.064 34.022 1628.958 0.032 1.532 0.101 4.836 1.079 51.639 32.81 1570.951 4605.83 220528.3241 0.097 0.092 0.102

43-46 1092-1168 367 0.048 14.832 710.167 0.001 0.048 0.000 0.000 0.000 0.000 14.83 710.064 4620.66 221238.3883 0.048 0.046 0.050

37-43 940-1092 366 0.048 29.654 1419.837 0.002 0.096 0.000 0.000 0.000 0.000 29.64 1419.171 4650.3 222657.5591 0.048 0.046 0.050

* 25-37 635-940 365 0.043 59.666 2856.831 0.004 0.192 0.000 0.000 0.212 10.159 59.45 2846.481 4709.75 225504.0404 0.046 0.044 0.048

13-25 330-635 364 0.043 59.635 2855.340 0.004 0.192 0.000 0.000 0.000 0.000 59.61 2854.142 4769.36 228358.1825 0.043 0.041 0.045

* 0-13 0-330 363 0.035 65.130 3118.420 0.004 0.192 0.000 0.000 -0.914 -43.784 66.04 3162.012 4835.4 231520.1947 0.022 0.021 0.023

Results for RBHT Test 1647

Valid Time Period 3525 to 3616 seconds

Collapsed Liquid Level = 100.811 inches = 2560.61 mm

 (Zosv) Onset of Significant Void = 49.5 inches = 1257 mm

Table A-153 Data Results for RBHT Test 1647

C for Time Period 3525 to 3616 seconds
A-462

Table A-154 Energy Balance Results for RBHT Test 1647C for Time Period 3525 to 3616 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1736.6375 5.4783 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

0.25 6.35 1833.1174 5.7827 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

0.50 12.70 1929.5973 6.0871 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

0.75 19.05 2026.0771 6.3914 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

1.00 25.40 2122.557 6.6958 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

1.25 31.75 2219.0369 7.0001 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

1.50 38.10 2315.5167 7.3045 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

1.75 44.45 2411.9966 7.6088 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

2.00 50.80 2508.4765 7.9132 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

2.25 57.15 2604.9563 8.2175 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

2.50 63.50 2701.4362 8.5219 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

2.75 69.85 2797.916 8.8262 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

3.00 76.20 2894.3959 9.1306 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

3.25 82.55 2990.8758 9.4349 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

3.50 88.90 3087.3556 9.7393 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

3.75 95.25 3183.8355 10.044 0.00E+00 0.00E+00 0.00E+00 8.45E-02 3.83E-02

4.00 101.60 3280.3154 10.348 2.64E-03 1.80E-01 8.17E-02 8.43E-02 3.82E-02

4.25 107.95 3376.7952 10.652 6.78E-03 4.63E-01 2.10E-01 8.40E-02 3.81E-02

4.50 114.30 3473.2751 10.957 1.10E-02 7.53E-01 3.42E-01 8.36E-02 3.79E-02

4.75 120.65 3569.755 11.261 1.54E-02 1.05E+00 4.77E-01 8.32E-02 3.77E-02

5.00 127.00 3666.2348 11.565 1.99E-02 1.36E+00 6.17E-01 8.28E-02 3.76E-02

5.25 133.35 3762.7147 11.87 2.45E-02 1.68E+00 7.60E-01 8.25E-02 3.74E-02

5.50 139.70 3859.1945 12.174 2.93E-02 2.00E+00 9.06E-01 8.21E-02 3.72E-02

5.75 146.05 3955.6744 12.478 3.41E-02 2.33E+00 1.06E+00 8.16E-02 3.70E-02

6.00 152.40 4052.1543 12.783 3.91E-02 2.67E+00 1.21E+00 8.12E-02 3.68E-02

6.25 158.75 4148.6341 13.087 4.42E-02 3.02E+00 1.37E+00 8.08E-02 3.66E-02

6.50 165.10 4245.114 13.392 4.94E-02 3.38E+00 1.53E+00 8.03E-02 3.64E-02

6.75 171.45 4341.5939 13.696 5.48E-02 3.74E+00 1.70E+00 7.99E-02 3.62E-02

7.00 177.80 4438.0737 14 6.02E-02 4.11E+00 1.87E+00 7.94E-02 3.60E-02

7.25 184.15 4534.5536 14.305 6.58E-02 4.49E+00 2.04E+00 7.90E-02 3.58E-02

7.50 190.50 4631.0335 14.609 7.15E-02 4.88E+00 2.21E+00 7.85E-02 3.56E-02

7.75 196.85 4727.5133 14.913 7.73E-02 5.28E+00 2.39E+00 7.80E-02 3.54E-02

8.00 203.20 4823.9932 15.218 8.32E-02 5.69E+00 2.58E+00 7.75E-02 3.51E-02

8.25 209.55 4920.473 15.522 8.93E-02 6.10E+00 2.77E+00 7.70E-02 3.49E-02

8.50 215.90 5016.9529 15.826 9.55E-02 6.52E+00 2.96E+00 7.65E-02 3.47E-02

8.75 222.25 5113.4328 16.131 1.02E-01 6.95E+00 3.15E+00 7.59E-02 3.44E-02

9.00 228.60 5209.9126 16.435 1.08E-01 7.39E+00 3.35E+00 7.54E-02 3.42E-02

9.25 234.95 4920.473 15.522 1.15E-01 7.82E+00 3.55E+00 7.48E-02 3.39E-02

9.50 241.30 4631.0335 14.609 1.20E-01 8.22E+00 3.73E+00 7.43E-02 3.37E-02

9.75 247.65 4341.5939 13.696 1.26E-01 8.61E+00 3.90E+00 7.39E-02 3.35E-02

10.00 254.00 4052.1543 12.783 1.31E-01 8.96E+00 4.06E+00 7.34E-02 3.33E-02

10.25 260.35 3762.7147 11.87 1.36E-01 9.30E+00 4.22E+00 7.30E-02 3.31E-02

10.50 266.70 3473.2751 10.957 1.41E-01 9.60E+00 4.36E+00 7.26E-02 3.29E-02

10.75 273.05 3183.8355 10.044 1.45E-01 9.88E+00 4.48E+00 7.23E-02 3.28E-02

11.00 279.40 2894.3959 9.1306 1.49E-01 1.01E+01 4.60E+00 7.20E-02 3.26E-02

11.25 285.75 2604.9563 8.2175 1.52E-01 1.04E+01 4.71E+00 7.17E-02 3.25E-02

11.50 292.10 2315.5167 7.3045 1.55E-01 1.06E+01 4.80E+00 7.14E-02 3.24E-02

11.75 298.45 2026.0771 6.3914 1.58E-01 1.08E+01 4.89E+00 7.12E-02 3.23E-02

12.00 304.80 1736.6375 5.4783 1.60E-01 1.09E+01 4.96E+00 7.10E-02 3.22E-02

Results for RBHT Test 1647

Valid Time Period 3525 to 3616 seconds
A-463

Figure A-385 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1647C for Time Period 3525 to 3616 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-464

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-A 

Test Conditions

Date: 6/24/2003

Steady-state time window: 909 – 987 seconds

Inlet flow rate: 2.532 cm/sec (0.997 in./sec) 

Inlet mass flow rate: 0.117 kg/sec (0.259 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-465

Figure A-386 Inlet Flow Plot for Experiment 1648A 

Figure A-387 Inlet Temperature Plot for Experiment 1648A 
A-466

Figure A-388 System Pressure Plot for Experiment 1648A 

Figure A-389 Bundle Power Plot for Experiment 1648A 
A-467

Table A-155: Data Results for RBHT Test 1648 for Time Period 909 to 987 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.540 26.260 1257.339 0.493 23.581 0.109 5.209 0.000 0.000 25.65 1228.129 4345.65 208070.8388 0.551 0.548 0.554

* 120-133 3048-3378 383 0.608 26.482 1267.957 0.544 26.047 0.194 9.303 -4.176 -199.971 29.92 1432.577 4375.57 209503.4161 0.557 0.554 0.559

* 108-120 2743-3048 382 0.495 31.472 1506.867 0.450 21.556 0.243 11.611 3.879 185.722 26.9 1287.979 4402.47 210791.395 0.568 0.565 0.571

100-108 2540-2743 381 0.563 18.144 868.736 0.266 12.712 0.177 8.494 0.000 0.000 17.7 847.481 4420.17 211638.8756 0.574 0.571 0.577

97-100 2464-2540 380 0.434 8.812 421.898 0.092 4.395 0.064 3.074 0.000 0.000 8.653 414.308 4428.823 212053.1834 0.444 0.442 0.447

93-97 2362-2464 379 0.460 11.215 536.977 0.116 5.549 0.084 4.005 0.000 0.000 11.01 527.162 4439.833 212580.3451 0.470 0.467 0.472

* 85-93 2159-2362 378 0.363 26.445 1266.191 0.210 10.031 0.161 7.685 5.315 254.481 20.76 993.994 4460.593 213574.3392 0.500 0.498 0.503

81-85 2057-2159 377 0.522 9.922 475.086 0.093 4.474 0.077 3.682 0.000 0.000 9.749 466.785 4470.342 214041.1238 0.531 0.528 0.533

78-81 1981-2057 376 0.392 9.479 453.875 0.065 3.117 0.056 2.691 0.000 0.000 9.355 447.920 4479.697 214489.0436 0.399 0.397 0.401

75-78 1905-1981 375 0.376 9.717 465.264 0.061 2.912 0.055 2.631 0.000 0.000 9.598 459.555 4489.295 214948.5983 0.384 0.382 0.386

72-75 1829-1905 374 0.277 11.269 539.563 0.056 2.704 0.054 2.570 0.000 0.000 11.16 534.344 4500.455 215482.942 0.284 0.282 0.285

* 67-72 1702-1829 373 0.316 17.769 850.808 0.084 4.037 0.087 4.149 -0.041 -1.986 17.64 844.608 4518.095 216327.5498 0.321 0.319 0.322

63-67 1600-1702 372 0.351 13.473 645.093 0.058 2.793 0.067 3.198 0.000 0.000 13.34 638.723 4531.435 216966.2724 0.358 0.356 0.359

60-63 1524-1600 371 0.253 11.640 557.317 0.038 1.829 0.049 2.328 0.000 0.000 11.55 553.017 4542.985 217519.2893 0.259 0.257 0.260

57-60 1448-1524 370 0.231 11.989 574.027 0.033 1.592 0.047 2.268 0.000 0.000 11.9 569.775 4554.885 218089.0644 0.236 0.235 0.237

53-57 1346-1448 369 0.150 17.663 845.686 0.036 1.732 0.061 2.930 0.000 0.000 17.56 840.777 4572.445 218929.8417 0.154 0.154 0.155

* 46-53 1168-1346 368 0.066 33.966 1626.323 0.038 1.798 0.102 4.869 1.177 56.364 32.65 1563.290 4605.095 220493.1321 0.102 0.101 0.102

43-46 1092-1168 367 0.048 14.840 710.540 0.004 0.194 0.014 0.656 0.000 0.000 14.82 709.585 4619.915 221202.7175 0.049 0.046 0.051

37-43 940-1092 366 0.049 29.646 1419.439 0.002 0.089 0.000 0.000 0.000 0.000 29.63 1418.692 4649.545 222621.4095 0.049 0.046 0.051

* 25-37 635-940 365 0.042 59.680 2857.503 0.004 0.178 0.000 0.000 0.236 11.323 59.44 2846.002 4708.985 225467.412 0.046 0.044 0.048

13-25 330-635 364 0.043 59.642 2855.688 0.004 0.178 0.000 0.000 0.000 0.000 59.62 2854.621 4768.605 228322.0329 0.043 0.041 0.045

* 0-13 0-330 363 0.035 65.134 3118.643 0.004 0.192 0.000 0.000 -0.910 -43.561 66.04 3162.012 4834.645 231484.0451 0.022 0.020 0.023

Results for RBHT Test 1648

Valid Time Period 909 to 987 seconds

Collapsed Liquid Level = 100.811 inches = 2560.59 mm

 (Zosv) Onset of Significant Void = 49.5 inches = 1257 mm

Table A-155 Data Results for RBHT Test 1648

A for Time Period 909 to 987 seconds
A-468

Table A-156 Energy Balance Results for RBHT Test 1648A for Time Period 909 to 987 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1742.1167 5.4956 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

0.25 6.35 1838.901 5.8009 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

0.50 12.70 1935.6853 6.1063 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

0.75 19.05 2032.4695 6.4116 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

1.00 25.40 2129.2538 6.7169 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

1.25 31.75 2226.038 7.0222 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

1.50 38.10 2322.8223 7.3275 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

1.75 44.45 2419.6066 7.6328 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

2.00 50.80 2516.3908 7.9381 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

2.25 57.15 2613.1751 8.2434 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

2.50 63.50 2709.9594 8.5488 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

2.75 69.85 2806.7436 8.8541 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

3.00 76.20 2903.5279 9.1594 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

3.25 82.55 3000.3122 9.4647 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

3.50 88.90 3097.0964 9.77 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

3.75 95.25 3193.8807 10.075 0.00E+00 0.00E+00 0.00E+00 8.41E-02 3.81E-02

4.00 101.60 3290.6649 10.381 4.03E-03 2.73E-01 1.24E-01 8.38E-02 3.80E-02

4.25 107.95 3387.4492 10.686 8.20E-03 5.57E-01 2.53E-01 8.34E-02 3.78E-02

4.50 114.30 3484.2335 10.991 1.25E-02 8.48E-01 3.85E-01 8.31E-02 3.77E-02

4.75 120.65 3581.0177 11.297 1.69E-02 1.15E+00 5.21E-01 8.27E-02 3.75E-02

5.00 127.00 3677.802 11.602 2.14E-02 1.46E+00 6.61E-01 8.23E-02 3.73E-02

5.25 133.35 3774.5863 11.907 2.61E-02 1.77E+00 8.04E-01 8.19E-02 3.72E-02

5.50 139.70 3871.3705 12.213 3.09E-02 2.10E+00 9.51E-01 8.15E-02 3.70E-02

5.75 146.05 3968.1548 12.518 3.58E-02 2.43E+00 1.10E+00 8.11E-02 3.68E-02

6.00 152.40 4064.939 12.823 4.08E-02 2.77E+00 1.26E+00 8.07E-02 3.66E-02

6.25 158.75 4161.7233 13.128 4.59E-02 3.12E+00 1.42E+00 8.02E-02 3.64E-02

6.50 165.10 4258.5076 13.434 5.12E-02 3.48E+00 1.58E+00 7.98E-02 3.62E-02

6.75 171.45 4355.2918 13.739 5.66E-02 3.84E+00 1.74E+00 7.93E-02 3.60E-02

7.00 177.80 4452.0761 14.044 6.21E-02 4.22E+00 1.91E+00 7.89E-02 3.58E-02

7.25 184.15 4548.8604 14.35 6.77E-02 4.60E+00 2.09E+00 7.84E-02 3.56E-02

7.50 190.50 4645.6446 14.655 7.34E-02 4.99E+00 2.26E+00 7.79E-02 3.53E-02

7.75 196.85 4742.4289 14.96 7.93E-02 5.39E+00 2.44E+00 7.74E-02 3.51E-02

8.00 203.20 4839.2131 15.266 8.53E-02 5.79E+00 2.63E+00 7.69E-02 3.49E-02

8.25 209.55 4935.9974 15.571 9.14E-02 6.21E+00 2.82E+00 7.64E-02 3.47E-02

8.50 215.90 5032.7817 15.876 9.76E-02 6.63E+00 3.01E+00 7.59E-02 3.44E-02

8.75 222.25 5129.5659 16.182 1.04E-01 7.06E+00 3.20E+00 7.54E-02 3.42E-02

9.00 228.60 5226.3502 16.487 1.10E-01 7.50E+00 3.40E+00 7.48E-02 3.39E-02

9.25 234.95 4935.9974 15.571 1.17E-01 7.93E+00 3.60E+00 7.43E-02 3.37E-02

9.50 241.30 4645.6446 14.655 1.23E-01 8.34E+00 3.78E+00 7.38E-02 3.35E-02

9.75 247.65 4355.2918 13.739 1.28E-01 8.72E+00 3.96E+00 7.33E-02 3.33E-02

10.00 254.00 4064.939 12.823 1.34E-01 9.08E+00 4.12E+00 7.29E-02 3.30E-02

10.25 260.35 3774.5863 11.907 1.39E-01 9.41E+00 4.27E+00 7.24E-02 3.29E-02

10.50 266.70 3484.2335 10.991 1.43E-01 9.72E+00 4.41E+00 7.21E-02 3.27E-02

10.75 273.05 3193.8807 10.075 1.47E-01 1.00E+01 4.54E+00 7.17E-02 3.25E-02

11.00 279.40 2903.5279 9.1594 1.51E-01 1.03E+01 4.66E+00 7.14E-02 3.24E-02

11.25 285.75 2613.1751 8.2434 1.55E-01 1.05E+01 4.76E+00 7.11E-02 3.23E-02

11.50 292.10 2322.8223 7.3275 1.58E-01 1.07E+01 4.86E+00 7.08E-02 3.21E-02

11.75 298.45 2032.4695 6.4116 1.60E-01 1.09E+01 4.94E+00 7.06E-02 3.20E-02

12.00 304.80 1742.1167 5.4956 1.63E-01 1.11E+01 5.01E+00 7.04E-02 3.19E-02

Results for RBHT Test 1648

Valid Time Period 909 to 987 seconds
A-469

Figure A-390 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648A for Time Period 909 to 987 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-470

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-B 

Test Conditions

Date: 6/24/2003

Steady-state time window: 1458 – 1545 seconds

Inlet flow rate: 2.014 cm/sec (0.793 in./sec) 

Inlet mass flow rate: 0.093 kg/sec (0.206 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-471

Figure A-391 Inlet Flow Plot for Experiment 1648B 

Figure A-392 Inlet Temperature Plot for Experiment 1648B 
A-472

Figure A-393 System Pressure Plot for Experiment 1648B 

Figure A-394 Bundle Power Plot for Experiment 1648B 
A-473

Table A-157: Data Results for RBHT Test 1648 for Time Period 1458 to 1545 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.575 24.289 1162.973 0.397 19.008 0.087 4.166 0.000 0.000 23.8 1139.550 4343.8 207982.2604 0.583 0.580 0.586

* 120-133 3048-3378 383 0.625 25.307 1211.710 0.440 21.067 0.155 7.421 -3.048 -145.934 27.76 1329.156 4371.56 209311.4163 0.589 0.586 0.592

* 108-120 2743-3048 382 0.515 30.225 1447.189 0.366 17.524 0.193 9.241 4.696 224.854 24.97 1195.570 4396.53 210506.9863 0.599 0.596 0.602

100-108 2540-2743 381 0.596 16.790 803.911 0.217 10.390 0.141 6.751 0.000 0.000 16.42 786.194 4412.95 211293.1801 0.605 0.602 0.608

97-100 2464-2540 380 0.455 8.486 406.307 0.076 3.639 0.051 2.442 0.000 0.000 8.359 400.231 4421.309 211693.4112 0.463 0.461 0.465

93-97 2362-2464 379 0.488 10.631 509.003 0.096 4.597 0.067 3.208 0.000 0.000 10.46 500.827 4431.769 212194.2387 0.496 0.494 0.498

* 85-93 2159-2362 378 0.382 25.691 1230.111 0.175 8.379 0.128 6.129 6.158 294.866 19.23 920.737 4450.999 213114.976 0.537 0.534 0.540

81-85 2057-2159 377 0.571 8.912 426.697 0.079 3.783 0.061 2.921 0.000 0.000 8.769 419.862 4459.768 213534.838 0.578 0.575 0.581

78-81 1981-2057 376 0.431 8.870 424.708 0.056 2.681 0.045 2.155 0.000 0.000 8.766 419.718 4468.534 213954.5563 0.437 0.435 0.439

75-78 1905-1981 375 0.421 9.026 432.168 0.053 2.538 0.044 2.107 0.000 0.000 8.925 427.331 4477.459 214381.8876 0.427 0.425 0.429

72-75 1829-1905 374 0.316 10.652 509.998 0.049 2.346 0.043 2.059 0.000 0.000 10.56 505.616 4488.019 214887.5031 0.322 0.320 0.324

* 67-72 1702-1829 373 0.358 16.660 797.695 0.075 3.591 0.069 3.304 0.276 13.225 16.24 777.575 4504.259 215665.0785 0.374 0.372 0.376

63-67 1600-1702 372 0.422 12.017 575.395 0.054 2.586 0.053 2.538 0.000 0.000 11.91 570.254 4516.169 216235.3324 0.427 0.425 0.42960-63 1524-1600 371 0.299 10.922 522.928 0.037 1.772 0.039 1.867 0.000 0.000 10.84 519.022 4527.009 216754.3544 0.304 0.302 0.306

57-60 1448-1524 370 0.299 10.922 522.928 0.033 1.580 0.038 1.819 0.000 0.000 10.85 519.501 4537.859 217273.8551 0.304 0.302 0.306

53-57 1346-1448 369 0.265 15.263 730.806 0.039 1.867 0.049 2.346 0.000 0.000 15.17 726.343 4553.029 218000.1986 0.269 0.268 0.270

* 46-53 1168-1346 368 0.177 29.934 1433.265 0.053 2.538 0.081 3.878 0.640 30.660 29.16 1396.188 4582.189 219396.3869 0.198 0.197 0.199

43-46 1092-1168 367 0.123 13.669 654.468 0.016 0.766 0.033 1.580 0.000 0.000 13.62 652.129 4595.809 220048.516 0.126 0.125 0.127

37-43 940-1092 366 0.054 29.472 1411.134 0.017 0.814 0.060 2.873 0.000 0.000 29.39 1407.201 4625.199 221455.7168 0.057 0.054 0.060

* 25-37 635-940 365 0.045 59.495 2848.626 0.002 0.096 0.000 0.000 0.343 16.413 59.15 2832.117 4684.349 224287.834 0.051 0.048 0.054

13-25 330-635 364 0.044 59.552 2851.361 0.002 0.096 0.000 0.000 0.000 0.000 59.53 2850.312 4743.879 227138.1457 0.044 0.042 0.046

* 0-13 0-330 363 0.036 65.093 3116.679 0.003 0.144 0.000 0.000 -0.900 -43.083 65.99 3159.618 4809.869 230297.7639 0.022 0.021 0.023

Results for RBHT Test 1648

Valid Time Period 1458 to 1545 seconds

Collapsed Liquid Level = 96.344 inches = 2447.15 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-157 Data Results for RBHT Test 1648

B for Time Period 1458 to 1545 seconds
A-474

Table A-158 Energy Balance Results for RBHT Test 1648B for Time Period 1458 to 1545 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1744.1686 5.5021 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

0.25 6.35 1841.0668 5.8078 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

0.50 12.70 1937.9651 6.1134 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

0.75 19.05 2034.8633 6.4191 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

1.00 25.40 2131.7616 6.7248 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

1.25 31.75 2228.6599 7.0305 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

1.50 38.10 2325.5581 7.3361 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

1.75 44.45 2422.4564 7.6418 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

2.00 50.80 2519.3546 7.9475 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

2.25 57.15 2616.2529 8.2532 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

2.50 63.50 2713.1511 8.5588 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

2.75 69.85 2810.0494 8.8645 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

3.00 76.20 2906.9476 9.1702 0.00E+00 0.00E+00 0.00E+00 6.69E-02 3.03E-02

3.25 82.55 3003.8459 9.4758 2.70E-03 1.46E-01 6.62E-02 6.67E-02 3.03E-02

3.50 88.90 3100.7441 9.7815 7.49E-03 4.05E-01 1.84E-01 6.64E-02 3.01E-02

3.75 95.25 3197.6424 10.087 1.24E-02 6.73E-01 3.05E-01 6.61E-02 3.00E-02

4.00 101.60 3294.5407 10.393 1.75E-02 9.49E-01 4.30E-01 6.57E-02 2.98E-02

4.25 107.95 3391.4389 10.699 2.28E-02 1.23E+00 5.59E-01 6.54E-02 2.97E-02

4.50 114.30 3488.3372 11.004 2.82E-02 1.53E+00 6.92E-01 6.50E-02 2.95E-02

4.75 120.65 3585.2354 11.31 3.38E-02 1.83E+00 8.28E-01 6.46E-02 2.93E-02

5.00 127.00 3682.1337 11.616 3.95E-02 2.13E+00 9.68E-01 6.43E-02 2.91E-02

5.25 133.35 3779.0319 11.921 4.53E-02 2.45E+00 1.11E+00 6.39E-02 2.90E-02

5.50 139.70 3875.9302 12.227 5.13E-02 2.78E+00 1.26E+00 6.35E-02 2.88E-02

5.75 146.05 3972.8284 12.533 5.75E-02 3.11E+00 1.41E+00 6.31E-02 2.86E-02

6.00 152.40 4069.7267 12.838 6.38E-02 3.45E+00 1.57E+00 6.26E-02 2.84E-02

6.25 158.75 4166.6249 13.144 7.03E-02 3.80E+00 1.72E+00 6.22E-02 2.82E-02

6.50 165.10 4263.5232 13.45 7.69E-02 4.16E+00 1.89E+00 6.18E-02 2.80E-02

6.75 171.45 4360.4215 13.755 8.37E-02 4.53E+00 2.05E+00 6.13E-02 2.78E-02

7.00 177.80 4457.3197 14.061 9.06E-02 4.90E+00 2.22E+00 6.08E-02 2.76E-02

7.25 184.15 4554.218 14.367 9.77E-02 5.28E+00 2.40E+00 6.04E-02 2.74E-02

7.50 190.50 4651.1162 14.672 1.05E-01 5.68E+00 2.57E+00 5.99E-02 2.72E-02

7.75 196.85 4748.0145 14.978 1.12E-01 6.08E+00 2.76E+00 5.94E-02 2.69E-02

8.00 203.20 4844.9127 15.284 1.20E-01 6.48E+00 2.94E+00 5.89E-02 2.67E-02

8.25 209.55 4941.811 15.589 1.28E-01 6.90E+00 3.13E+00 5.84E-02 2.65E-02

8.50 215.90 5038.7092 15.895 1.35E-01 7.32E+00 3.32E+00 5.78E-02 2.62E-02

8.75 222.25 5135.6075 16.201 1.43E-01 7.75E+00 3.52E+00 5.73E-02 2.60E-02

9.00 228.60 5232.5057 16.506 1.52E-01 8.20E+00 3.72E+00 5.68E-02 2.57E-02

9.25 234.95 4941.811 15.589 1.60E-01 8.63E+00 3.91E+00 5.62E-02 2.55E-02

9.50 241.30 4651.1162 14.672 1.67E-01 9.03E+00 4.10E+00 5.57E-02 2.53E-02

9.75 247.65 4360.4215 13.755 1.74E-01 9.42E+00 4.27E+00 5.52E-02 2.51E-02

10.00 254.00 4069.7267 12.838 1.81E-01 9.78E+00 4.43E+00 5.48E-02 2.49E-02

10.25 260.35 3779.0319 11.921 1.87E-01 1.01E+01 4.59E+00 5.44E-02 2.47E-02

10.50 266.70 3488.3372 11.004 1.93E-01 1.04E+01 4.73E+00 5.40E-02 2.45E-02

10.75 273.05 3197.6424 10.087 1.98E-01 1.07E+01 4.85E+00 5.37E-02 2.43E-02

11.00 279.40 2906.9476 9.1702 2.03E-01 1.10E+01 4.97E+00 5.33E-02 2.42E-02

11.25 285.75 2616.2529 8.2532 2.07E-01 1.12E+01 5.08E+00 5.31E-02 2.41E-02

11.50 292.10 2325.5581 7.3361 2.11E-01 1.14E+01 5.17E+00 5.28E-02 2.39E-02

11.75 298.45 2034.8633 6.4191 2.14E-01 1.16E+01 5.26E+00 5.26E-02 2.38E-02

12.00 304.80 1744.1686 5.5021 2.17E-01 1.18E+01 5.33E+00 5.24E-02 2.38E-02

Results for RBHT Test 1648

Valid Time Period 1458 to 1545 seconds
A-475

Figure A-395 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648B for Time Period 1458 to 1545 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-476

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-C 

Test Conditions

Date: 6/24/2003

Steady-state time window: 1734 – 1800 seconds

Inlet flow rate: 2.027 cm/sec (0.798 in./sec) 

Inlet mass flow rate: 0.094 kg/sec (0.207 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-477

Figure A-396 Inlet Flow Plot for Experiment 1648C 

Figure A-397 Inlet Temperature Plot for Experiment 1648C 
A-478

Figure A-398 System Pressure Plot for Experiment 1648C 

Figure A-399 Bundle Power Plot for Experiment 1648C 
A-479

Table A-159: Data Results for RBHT Test 1648 for Time Period 1734 to 1800 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.574 24.352 1165.957 0.399 19.104 0.087 4.166 0.000 0.000 23.86 1142.423 4343.86 207985.1332 0.582 0.579 0.585

* 120-133 3048-3378 383 0.628 25.105 1202.013 0.441 21.115 0.155 7.421 -3.281 -157.116 27.79 1330.592 4371.65 209315.7255 0.588 0.585 0.591

* 108-120 2743-3048 382 0.517 30.101 1441.222 0.367 17.572 0.194 9.289 4.640 222.142 24.9 1192.218 4396.55 210507.9439 0.6 0.597 0.603

100-108 2540-2743 381 0.598 16.717 800.430 0.218 10.438 0.142 6.799 0.000 0.000 16.35 782.842 4412.9 211290.7861 0.606 0.603 0.609

97-100 2464-2540 380 0.454 8.507 407.302 0.076 3.639 0.051 2.442 0.000 0.000 8.376 401.045 4421.276 211691.8311 0.462 0.460 0.464

93-97 2362-2464 379 0.489 10.620 508.506 0.096 4.597 0.067 3.208 0.000 0.000 10.45 500.349 4431.726 212192.1798 0.497 0.495 0.499

* 85-93 2159-2362 378 0.381 25.702 1230.608 0.176 8.427 0.128 6.129 6.108 292.443 19.29 923.610 4451.016 213115.79 0.536 0.533 0.539

81-85 2057-2159 377 0.568 8.984 430.178 0.079 3.783 0.062 2.969 0.000 0.000 8.838 423.166 4459.854 213538.9557 0.574 0.571 0.577

78-81 1981-2057 376 0.436 8.782 420.481 0.056 2.681 0.045 2.155 0.000 0.000 8.677 415.457 4468.531 213954.4127 0.443 0.441 0.445

75-78 1905-1981 375 0.422 9.000 430.924 0.053 2.538 0.044 2.107 0.000 0.000 8.9 426.134 4477.431 214380.547 0.429 0.427 0.431

72-75 1829-1905 374 0.318 10.620 508.506 0.049 2.346 0.043 2.059 0.000 0.000 10.53 504.179 4487.961 214884.7261 0.324 0.322 0.326

* 67-72 1702-1829 373 0.356 16.728 800.927 0.075 3.591 0.069 3.304 0.404 19.330 16.18 774.703 4504.141 215659.4286 0.377 0.375 0.379

63-67 1600-1702 372 0.424 11.960 572.659 0.054 2.586 0.053 2.538 0.000 0.000 11.85 567.381 4515.991 216226.8097 0.429 0.427 0.431

60-63 1524-1600 371 0.298 10.932 523.425 0.037 1.772 0.039 1.867 0.000 0.000 10.85 519.501 4526.841 216746.3105 0.303 0.301 0.305

57-60 1448-1524 370 0.297 10.953 524.420 0.033 1.580 0.038 1.819 0.000 0.000 10.88 520.937 4537.721 217267.2477 0.302 0.300 0.304

53-57 1346-1448 369 0.262 15.331 734.038 0.039 1.867 0.049 2.346 0.000 0.000 15.24 729.695 4552.961 217996.9428 0.266 0.265 0.267

* 46-53 1168-1346 368 0.178 29.898 1431.524 0.053 2.538 0.081 3.878 0.534 25.568 29.23 1399.540 4582.191 219396.4827 0.196 0.195 0.197

43-46 1092-1168 367 0.122 13.679 654.965 0.016 0.766 0.033 1.580 0.000 0.000 13.62 652.129 4595.811 220048.6118 0.125 0.124 0.126

37-43 940-1092 366 0.054 29.472 1411.134 0.017 0.814 0.059 2.825 0.000 0.000 29.39 1407.201 4625.201 221455.8126 0.057 0.054 0.060

* 25-37 635-940 365 0.045 59.495 2848.626 0.002 0.096 0.000 0.000 0.343 16.413 59.15 2832.117 4684.351 224287.9298 0.051 0.048 0.054

13-25 330-635 364 0.044 59.552 2851.361 0.002 0.096 0.000 0.000 0.000 0.000 59.53 2850.312 4743.881 227138.2415 0.045 0.043 0.047

* 0-13 0-330 363 0.036 65.093 3116.679 0.003 0.144 0.000 0.000 -0.900 -43.083 65.99 3159.618 4809.871 230297.8596 0.022 0.021 0.023

Results for RBHT Test 1648

Valid Time Period 1734 to 1800 seconds

Collapsed Liquid Level = 96.434 inches = 2449.41 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-159 Data Results for RBHT Test 1648

C for Time Period 1734 to 1800 seconds
A-480

Table A-160 Energy Balance Results for RBHT Test 1648C for Time Period 1734 to 1800 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.1022 5.4987 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

0.25 6.35 1839.9413 5.8042 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

0.50 12.70 1936.7803 6.1097 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

0.75 19.05 2033.6193 6.4152 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

1.00 25.40 2130.4583 6.7207 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

1.25 31.75 2227.2973 7.0262 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

1.50 38.10 2324.1363 7.3317 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

1.75 44.45 2420.9753 7.6371 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

2.00 50.80 2517.8143 7.9426 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

2.25 57.15 2614.6534 8.2481 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

2.50 63.50 2711.4924 8.5536 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

2.75 69.85 2808.3314 8.8591 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

3.00 76.20 2905.1704 9.1646 0.00E+00 0.00E+00 0.00E+00 6.73E-02 3.05E-02

3.25 82.55 3002.0094 9.4701 2.45E-03 1.33E-01 6.02E-02 6.72E-02 3.05E-02

3.50 88.90 3098.8484 9.7755 7.21E-03 3.91E-01 1.77E-01 6.68E-02 3.03E-02

3.75 95.25 3195.6874 10.081 1.21E-02 6.58E-01 2.98E-01 6.65E-02 3.02E-02

4.00 101.60 3292.5265 10.387 1.72E-02 9.33E-01 4.23E-01 6.62E-02 3.00E-02

4.25 107.95 3389.3655 10.692 2.24E-02 1.22E+00 5.52E-01 6.58E-02 2.99E-02

4.50 114.30 3486.2045 10.997 2.78E-02 1.51E+00 6.84E-01 6.55E-02 2.97E-02

4.75 120.65 3583.0435 11.303 3.33E-02 1.81E+00 8.20E-01 6.51E-02 2.95E-02

5.00 127.00 3679.8825 11.608 3.90E-02 2.11E+00 9.59E-01 6.47E-02 2.93E-02

5.25 133.35 3776.7215 11.914 4.48E-02 2.43E+00 1.10E+00 6.43E-02 2.92E-02

5.50 139.70 3873.5605 12.219 5.07E-02 2.75E+00 1.25E+00 6.39E-02 2.90E-02

5.75 146.05 3970.3996 12.525 5.69E-02 3.09E+00 1.40E+00 6.35E-02 2.88E-02

6.00 152.40 4067.2386 12.83 6.31E-02 3.43E+00 1.55E+00 6.31E-02 2.86E-02

6.25 158.75 4164.0776 13.136 6.96E-02 3.78E+00 1.71E+00 6.26E-02 2.84E-02

6.50 165.10 4260.9166 13.441 7.61E-02 4.13E+00 1.88E+00 6.22E-02 2.82E-02

6.75 171.45 4357.7556 13.747 8.29E-02 4.50E+00 2.04E+00 6.17E-02 2.80E-02

7.00 177.80 4454.5946 14.052 8.97E-02 4.87E+00 2.21E+00 6.13E-02 2.78E-02

7.25 184.15 4551.4336 14.358 9.68E-02 5.25E+00 2.38E+00 6.08E-02 2.76E-02

7.50 190.50 4648.2726 14.663 1.04E-01 5.65E+00 2.56E+00 6.03E-02 2.74E-02

7.75 196.85 4745.1117 14.969 1.11E-01 6.04E+00 2.74E+00 5.98E-02 2.71E-02

8.00 203.20 4841.9507 15.274 1.19E-01 6.45E+00 2.93E+00 5.93E-02 2.69E-02

8.25 209.55 4938.7897 15.58 1.26E-01 6.86E+00 3.11E+00 5.88E-02 2.67E-02

8.50 215.90 5035.6287 15.885 1.34E-01 7.29E+00 3.30E+00 5.83E-02 2.64E-02

8.75 222.25 5132.4677 16.191 1.42E-01 7.72E+00 3.50E+00 5.78E-02 2.62E-02

9.00 228.60 5229.3067 16.496 1.50E-01 8.16E+00 3.70E+00 5.72E-02 2.60E-02

9.25 234.95 4938.7897 15.58 1.58E-01 8.58E+00 3.89E+00 5.67E-02 2.57E-02

9.50 241.30 4648.2726 14.663 1.66E-01 8.99E+00 4.08E+00 5.62E-02 2.55E-02

9.75 247.65 4357.7556 13.747 1.73E-01 9.38E+00 4.25E+00 5.57E-02 2.53E-02

10.00 254.00 4067.2386 12.83 1.79E-01 9.73E+00 4.41E+00 5.53E-02 2.51E-02

10.25 260.35 3776.7215 11.914 1.85E-01 1.01E+01 4.57E+00 5.48E-02 2.49E-02

10.50 266.70 3486.2045 10.997 1.91E-01 1.04E+01 4.70E+00 5.45E-02 2.47E-02

10.75 273.05 3195.6874 10.081 1.96E-01 1.07E+01 4.83E+00 5.41E-02 2.45E-02

11.00 279.40 2905.1704 9.1646 2.01E-01 1.09E+01 4.95E+00 5.38E-02 2.44E-02

11.25 285.75 2614.6534 8.2481 2.05E-01 1.11E+01 5.06E+00 5.35E-02 2.43E-02

11.50 292.10 2324.1363 7.3317 2.09E-01 1.14E+01 5.15E+00 5.32E-02 2.41E-02

11.75 298.45 2033.6193 6.4152 2.13E-01 1.15E+01 5.24E+00 5.30E-02 2.40E-02

12.00 304.80 1743.1022 5.4987 2.16E-01 1.17E+01 5.31E+00 5.28E-02 2.40E-02

Results for RBHT Test 1648

Valid Time Period 1734 to 1800 seconds
A-481

Figure A-400 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648C for Time Period 1734 to 1800 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-482

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-D 

Test Conditions

Date: 6/24/2003

Steady-state time window: 2040 – 2133 seconds

Inlet flow rate: 1.529 cm/sec (0.602 in./sec) 

Inlet mass flow rate: 0.071 kg/sec (0.156 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-483

Figure A-401 Inlet Flow Plot for Experiment 1648D 

Figure A-402 Inlet Temperature Plot for Experiment 1648D 
A-484

Figure A-403 System Pressure Plot for Experiment 1648D 

Figure A-404 Bundle Power Plot for Experiment 1648D 
A-485

Table A-161: Data Results for RBHT Test 1648 for Time Period 2040 to 2133 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.614 22.035 1055.056 0.303 14.508 0.066 3.160 0.000 0.000 21.66 1037.086 4341.66 207879.7966 0.621 0.618 0.624

* 120-133 3048-3378 383 0.648 23.765 1137.859 0.336 16.088 0.118 5.650 -2.079 -99.558 25.39 1215.680 4367.05 209095.4763 0.624 0.621 0.627

* 108-120 2743-3048 382 0.533 29.083 1392.485 0.280 13.406 0.147 7.038 5.606 268.400 23.05 1103.640 4390.1 210199.1163 0.63 0.627 0.633

100-108 2540-2743 381 0.626 15.523 743.239 0.167 7.996 0.107 5.123 0.000 0.000 15.24 729.695 4405.34 210928.8114 0.633 0.630 0.636

97-100 2464-2540 380 0.473 8.205 392.880 0.058 2.777 0.039 1.867 0.000 0.000 8.104 388.022 4413.444 211316.833 0.48 0.478 0.482

93-97 2362-2464 379 0.514 10.096 483.391 0.074 3.543 0.051 2.442 0.000 0.000 9.969 477.318 4423.413 211794.1513 0.52 0.517 0.523

* 85-93 2159-2362 378 0.395 25.156 1204.499 0.136 6.512 0.097 4.644 6.933 331.977 17.99 861.366 4441.403 212655.5171 0.567 0.564 0.570

81-85 2057-2159 377 0.608 8.138 389.647 0.062 2.969 0.047 2.250 0.000 0.000 8.026 384.287 4449.429 213039.804 0.614 0.611 0.61778-81 1981-2057 376 0.468 8.283 396.609 0.044 2.107 0.034 1.628 0.000 0.000 8.204 392.810 4457.633 213432.6137 0.473 0.471 0.47575-78 1905-1981 375 0.469 8.278 396.361 0.042 2.011 0.033 1.580 0.000 0.000 8.2 392.618 4465.833 213825.2318 0.474 0.472 0.47672-75 1829-1905 374 0.355 10.044 480.905 0.040 1.915 0.032 1.532 0.000 0.000 9.967 477.223 4475.8 214302.4543 0.36 0.358 0.362

* 67-72 1702-1829 373 0.370 16.354 783.024 0.061 2.921 0.052 2.490 1.301 62.282 14.94 715.331 4490.74 215017.7853 0.425 0.423 0.427

63-67 1600-1702 372 0.485 10.703 512.484 0.044 2.107 0.040 1.915 0.000 0.000 10.61 508.010 4501.35 215525.7948 0.489 0.487 0.49160-63 1524-1600 371 0.336 10.340 495.078 0.031 1.484 0.029 1.389 0.000 0.000 10.27 491.730 4511.62 216017.5251 0.34 0.338 0.34257-60 1448-1524 370 0.328 10.475 501.543 0.029 1.389 0.029 1.389 0.000 0.000 10.41 498.433 4522.03 216515.9586 0.332 0.330 0.33453-57 1346-1448 369 0.304 14.453 692.015 0.035 1.676 0.037 1.772 0.000 0.000 14.38 688.518 4536.41 217204.4767 0.308 0.306 0.310

* 46-53 1168-1346 368 0.227 28.091 1344.991 0.051 2.442 0.061 2.921 2.839 135.919 25.14 1203.710 4561.55 218408.1863 0.308 0.306 0.310

43-46 1092-1168 367 0.306 10.813 517.706 0.018 0.862 0.025 1.197 0.000 0.000 10.77 515.670 4572.32 218923.8567 0.309 0.307 0.31137-43 940-1092 366 0.200 24.918 1193.061 0.028 1.341 0.048 2.298 0.000 0.000 24.83 1188.867 4597.15 220112.7235 0.203 0.202 0.204

* 25-37 635-940 365 0.056 58.814 2816.052 0.028 1.341 0.055 2.633 4.201 201.167 54.53 2610.910 4651.68 222723.6339 0.125 0.124 0.126

13-25 330-635 364 0.047 59.401 2844.150 0.001 0.048 0.000 0.000 0.000 0.000 59.38 2843.130 4711.06 225566.7635 0.047 0.045 0.049

* 0-13 0-330 363 0.036 65.052 3114.690 0.001 0.048 0.000 0.000 -0.859 -41.146 65.91 3155.788 4776.97 228722.5513 0.023 0.022 0.024

Results for RBHT Test 1648

Valid Time Period 2040 to 2133 seconds

Collapsed Liquid Level = 91.781 inches = 2331.23 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-161 Data Results for RBHT Test 1648

D for Time Period 2040 to 2133 seconds
A-486

Table A-162 Energy Balance Results for RBHT Test 1648D for Time Period 2040 to 2133 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.8796 5.5012 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

0.25 6.35 1840.7618 5.8068 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

0.50 12.70 1937.644 6.1124 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

0.75 19.05 2034.5262 6.4181 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

1.00 25.40 2131.4084 6.7237 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

1.25 31.75 2228.2906 7.0293 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

1.50 38.10 2325.1728 7.3349 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

1.75 44.45 2422.055 7.6405 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

2.00 50.80 2518.9372 7.9462 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

2.25 57.15 2615.8194 8.2518 0.00E+00 0.00E+00 0.00E+00 5.08E-02 2.30E-02

2.50 63.50 2712.7016 8.5574 7.51E-04 3.08E-02 1.40E-02 5.07E-02 2.30E-02

2.75 69.85 2809.5838 8.863 6.47E-03 2.65E-01 1.20E-01 5.04E-02 2.29E-02

3.00 76.20 2906.466 9.1687 1.24E-02 5.08E-01 2.30E-01 5.01E-02 2.27E-02

3.25 82.55 3003.3482 9.4743 1.85E-02 7.59E-01 3.44E-01 4.98E-02 2.26E-02

3.50 88.90 3100.2304 9.7799 2.48E-02 1.02E+00 4.62E-01 4.95E-02 2.25E-02

3.75 95.25 3197.1126 10.086 3.13E-02 1.29E+00 5.83E-01 4.92E-02 2.23E-02

4.00 101.60 3293.9948 10.391 3.81E-02 1.56E+00 7.08E-01 4.88E-02 2.22E-02

4.25 107.95 3390.877 10.697 4.50E-02 1.85E+00 8.37E-01 4.85E-02 2.20E-02

4.50 114.30 3487.7592 11.002 5.21E-02 2.14E+00 9.70E-01 4.81E-02 2.18E-02

4.75 120.65 3584.6414 11.308 5.94E-02 2.44E+00 1.11E+00 4.77E-02 2.17E-02

5.00 127.00 3681.5236 11.614 6.69E-02 2.75E+00 1.25E+00 4.74E-02 2.15E-02

5.25 133.35 3778.4058 11.919 7.47E-02 3.06E+00 1.39E+00 4.70E-02 2.13E-02

5.50 139.70 3875.288 12.225 8.26E-02 3.39E+00 1.54E+00 4.66E-02 2.11E-02

5.75 146.05 3972.1702 12.53 9.07E-02 3.72E+00 1.69E+00 4.62E-02 2.09E-02

6.00 152.40 4069.0524 12.836 9.90E-02 4.06E+00 1.84E+00 4.57E-02 2.07E-02

6.25 158.75 4165.9346 13.142 1.08E-01 4.41E+00 2.00E+00 4.53E-02 2.06E-02

6.50 165.10 4262.8168 13.447 1.16E-01 4.77E+00 2.16E+00 4.49E-02 2.03E-02

6.75 171.45 4359.699 13.753 1.25E-01 5.14E+00 2.33E+00 4.44E-02 2.01E-02

7.00 177.80 4456.5812 14.059 1.34E-01 5.51E+00 2.50E+00 4.39E-02 1.99E-02

7.25 184.15 4553.4634 14.364 1.44E-01 5.89E+00 2.67E+00 4.35E-02 1.97E-02

7.50 190.50 4650.3456 14.67 1.53E-01 6.29E+00 2.85E+00 4.30E-02 1.95E-02

7.75 196.85 4747.2278 14.975 1.63E-01 6.69E+00 3.03E+00 4.25E-02 1.93E-02

8.00 203.20 4844.11 15.281 1.73E-01 7.09E+00 3.22E+00 4.20E-02 1.90E-02

8.25 209.55 4940.9922 15.587 1.83E-01 7.51E+00 3.40E+00 4.15E-02 1.88E-02

8.50 215.90 5037.8744 15.892 1.93E-01 7.93E+00 3.60E+00 4.10E-02 1.86E-02

8.75 222.25 5134.7566 16.198 2.04E-01 8.36E+00 3.79E+00 4.04E-02 1.83E-02

9.00 228.60 5231.6388 16.504 2.15E-01 8.80E+00 3.99E+00 3.99E-02 1.81E-02

9.25 234.95 4940.9922 15.587 2.25E-01 9.23E+00 4.19E+00 3.93E-02 1.78E-02

9.50 241.30 4650.3456 14.67 2.35E-01 9.64E+00 4.37E+00 3.88E-02 1.76E-02

9.75 247.65 4359.699 13.753 2.44E-01 1.00E+01 4.55E+00 3.84E-02 1.74E-02

10.00 254.00 4069.0524 12.836 2.53E-01 1.04E+01 4.71E+00 3.79E-02 1.72E-02

10.25 260.35 3778.4058 11.919 2.61E-01 1.07E+01 4.86E+00 3.75E-02 1.70E-02

10.50 266.70 3487.7592 11.002 2.69E-01 1.10E+01 5.00E+00 3.71E-02 1.68E-02

10.75 273.05 3197.1126 10.086 2.76E-01 1.13E+01 5.13E+00 3.68E-02 1.67E-02

11.00 279.40 2906.466 9.1687 2.82E-01 1.16E+01 5.25E+00 3.65E-02 1.65E-02

11.25 285.75 2615.8194 8.2518 2.88E-01 1.18E+01 5.35E+00 3.62E-02 1.64E-02

11.50 292.10 2325.1728 7.3349 2.93E-01 1.20E+01 5.45E+00 3.59E-02 1.63E-02

11.75 298.45 2034.5262 6.4181 2.97E-01 1.22E+01 5.53E+00 3.57E-02 1.62E-02

12.00 304.80 1743.8796 5.5012 3.01E-01 1.24E+01 5.60E+00 3.55E-02 1.61E-02

Results for RBHT Test 1648

Valid Time Period 2040 to 2133 seconds
A-487

Figure A-405 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648D for Time Period 2040 to 2133 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-488

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-E 

Test Conditions

Date: 6/24/2003

Steady-state time window: 2313 – 2470 seconds

Inlet flow rate: 1.521 cm/sec (0.599 in./sec) 

Inlet mass flow rate: 0.071 kg/sec (0.156 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-489

Figure A-406 Inlet Flow Plot for Experiment 1648E 

Figure A-407 Inlet Temperature Plot for Experiment 1648E 
A-490

Figure A-408 System Pressure Plot for Experiment 1648E 

Figure A-409 Bundle Power Plot for Experiment 1648E 
A-491

Table A-163: Data Results for RBHT Test 1648 for Time Period 2313 to 2470 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.614 22.035 1055.056 0.301 14.412 0.065 3.112 0.000 0.000 21.66 1037.086 4341.66 207879.7966 0.621 0.618 0.624

* 120-133 3048-3378 383 0.649 23.728 1136.118 0.334 15.992 0.117 5.602 -2.073 -99.240 25.35 1213.765 4367.01 209093.5611 0.624 0.621 0.627

* 108-120 2743-3048 382 0.537 28.849 1381.295 0.278 13.311 0.146 6.991 5.475 262.142 22.95 1098.852 4389.96 210192.413 0.632 0.629 0.635

100-108 2540-2743 381 0.629 15.429 738.763 0.166 7.948 0.107 5.123 0.000 0.000 15.15 725.386 4405.11 210917.7989 0.635 0.632 0.638

97-100 2464-2540 380 0.475 8.174 391.388 0.058 2.777 0.039 1.867 0.000 0.000 8.073 386.537 4413.183 211304.3362 0.482 0.480 0.484

93-97 2362-2464 379 0.518 10.018 479.661 0.074 3.543 0.050 2.394 0.000 0.000 9.891 473.584 4423.074 211777.9199 0.524 0.521 0.527

* 85-93 2159-2362 378 0.395 25.120 1202.759 0.136 6.512 0.096 4.597 7.028 336.509 17.86 855.141 4440.934 212633.0612 0.57 0.567 0.573

81-85 2057-2159 377 0.611 8.081 386.912 0.062 2.969 0.046 2.202 0.000 0.000 7.969 381.558 4448.903 213014.619 0.616 0.613 0.61978-81 1981-2057 376 0.461 8.403 402.329 0.044 2.107 0.034 1.628 0.000 0.000 8.325 398.603 4457.228 213413.2221 0.466 0.464 0.46875-78 1905-1981 375 0.469 8.278 396.361 0.042 2.011 0.033 1.580 0.000 0.000 8.203 392.762 4465.431 213805.9839 0.473 0.471 0.47572-75 1829-1905 374 0.359 9.982 477.921 0.039 1.867 0.032 1.532 0.000 0.000 9.905 474.254 4475.336 214280.2378 0.364 0.362 0.366

* 67-72 1702-1829 373 0.376 16.203 775.813 0.061 2.921 0.052 2.490 1.190 56.987 14.9 713.416 4490.236 214993.6537 0.426 0.424 0.428

63-67 1600-1702 372 0.484 10.719 513.230 0.044 2.107 0.040 1.915 0.000 0.000 10.63 508.967 4500.866 215502.6208 0.488 0.486 0.49060-63 1524-1600 371 0.340 10.288 492.591 0.031 1.484 0.029 1.389 0.000 0.000 10.22 489.336 4511.086 215991.957 0.344 0.342 0.34657-60 1448-1524 370 0.329 10.449 500.300 0.028 1.341 0.028 1.341 0.000 0.000 10.39 497.476 4521.476 216489.4329 0.333 0.331 0.33553-57 1346-1448 369 0.306 14.411 690.026 0.034 1.628 0.037 1.772 0.000 0.000 14.34 686.603 4535.816 217176.0358 0.31 0.308 0.312

* 46-53 1168-1346 368 0.228 28.080 1344.494 0.050 2.394 0.061 2.921 2.949 141.215 25.02 1197.964 4560.836 218373.9998 0.312 0.310 0.314

43-46 1092-1168 367 0.311 10.740 514.225 0.018 0.862 0.025 1.197 0.000 0.000 10.69 511.840 4571.526 218885.8398 0.313 0.311 0.31537-43 940-1092 366 0.206 24.746 1184.855 0.028 1.341 0.048 2.298 0.000 0.000 24.67 1181.206 4596.196 220067.0457 0.208 0.207 0.209

* 25-37 635-940 365 0.058 58.685 2809.835 0.028 1.341 0.056 2.681 4.251 203.521 54.35 2602.292 4650.546 222669.3377 0.128 0.127 0.129

13-25 330-635 364 0.047 59.396 2843.901 0.001 0.048 0.000 0.000 0.000 0.000 59.37 2842.651 4709.916 225511.9885 0.047 0.045 0.049

* 0-13 0-330 363 0.036 65.057 3114.938 0.001 0.048 0.000 0.000 -0.854 -40.897 65.91 3155.788 4775.826 228667.7763 0.023 0.022 0.024

Results for RBHT Test 1648

Valid Time Period 2313 to 2470 seconds

Collapsed Liquid Level = 91.548 inches = 2325.31 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-163 Data Results for RBHT Test 1648

E for Time Period 2313 to 2470 seconds
A-492

Table A-164 Energy Balance Results for RBHT Test 1648E for Time Period 2313 to 2470 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1743.8938 5.5012 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

0.25 6.35 1840.7768 5.8069 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

0.50 12.70 1937.6598 6.1125 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

0.75 19.05 2034.5428 6.4181 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

1.00 25.40 2131.4258 6.7237 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

1.25 31.75 2228.3088 7.0294 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

1.50 38.10 2325.1918 7.335 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

1.75 44.45 2422.0748 7.6406 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

2.00 50.80 2518.9577 7.9462 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

2.25 57.15 2615.8407 8.2519 0.00E+00 0.00E+00 0.00E+00 5.05E-02 2.29E-02

2.50 63.50 2712.7237 8.5575 1.06E-03 4.33E-02 1.96E-02 5.05E-02 2.29E-02

2.75 69.85 2809.6067 8.8631 6.81E-03 2.78E-01 1.26E-01 5.02E-02 2.28E-02

3.00 76.20 2906.4897 9.1687 1.28E-02 5.20E-01 2.36E-01 4.99E-02 2.26E-02

3.25 82.55 3003.3727 9.4744 1.89E-02 7.71E-01 3.50E-01 4.96E-02 2.25E-02

3.50 88.90 3100.2557 9.78 2.53E-02 1.03E+00 4.67E-01 4.92E-02 2.23E-02

3.75 95.25 3197.1387 10.086 3.18E-02 1.30E+00 5.88E-01 4.89E-02 2.22E-02

4.00 101.60 3294.0217 10.391 3.86E-02 1.57E+00 7.13E-01 4.86E-02 2.20E-02

4.25 107.95 3390.9047 10.697 4.55E-02 1.86E+00 8.42E-01 4.82E-02 2.19E-02

4.50 114.30 3487.7876 11.002 5.27E-02 2.15E+00 9.74E-01 4.78E-02 2.17E-02

4.75 120.65 3584.6706 11.308 6.00E-02 2.45E+00 1.11E+00 4.75E-02 2.15E-02

5.00 127.00 3681.5536 11.614 6.76E-02 2.76E+00 1.25E+00 4.71E-02 2.14E-02

5.25 133.35 3778.4366 11.919 7.53E-02 3.07E+00 1.39E+00 4.67E-02 2.12E-02

5.50 139.70 3875.3196 12.225 8.33E-02 3.40E+00 1.54E+00 4.63E-02 2.10E-02

5.75 146.05 3972.2026 12.531 9.15E-02 3.73E+00 1.69E+00 4.59E-02 2.08E-02

6.00 152.40 4069.0856 12.836 9.98E-02 4.07E+00 1.85E+00 4.55E-02 2.06E-02

6.25 158.75 4165.9686 13.142 1.08E-01 4.42E+00 2.01E+00 4.50E-02 2.04E-02

6.50 165.10 4262.8516 13.447 1.17E-01 4.78E+00 2.17E+00 4.46E-02 2.02E-02

6.75 171.45 4359.7346 13.753 1.26E-01 5.14E+00 2.33E+00 4.41E-02 2.00E-02

7.00 177.80 4456.6176 14.059 1.35E-01 5.52E+00 2.50E+00 4.37E-02 1.98E-02

7.25 184.15 4553.5005 14.364 1.45E-01 5.90E+00 2.68E+00 4.32E-02 1.96E-02

7.50 190.50 4650.3835 14.67 1.54E-01 6.29E+00 2.85E+00 4.27E-02 1.94E-02

7.75 196.85 4747.2665 14.976 1.64E-01 6.69E+00 3.03E+00 4.22E-02 1.92E-02

8.00 203.20 4844.1495 15.281 1.74E-01 7.10E+00 3.22E+00 4.17E-02 1.89E-02

8.25 209.55 4941.0325 15.587 1.84E-01 7.51E+00 3.41E+00 4.12E-02 1.87E-02

8.50 215.90 5037.9155 15.892 1.95E-01 7.94E+00 3.60E+00 4.07E-02 1.85E-02

8.75 222.25 5134.7985 16.198 2.05E-01 8.37E+00 3.80E+00 4.01E-02 1.82E-02

9.00 228.60 5231.6815 16.504 2.16E-01 8.80E+00 3.99E+00 3.96E-02 1.80E-02

9.25 234.95 4941.0325 15.587 2.27E-01 9.24E+00 4.19E+00 3.91E-02 1.77E-02

9.50 241.30 4650.3835 14.67 2.37E-01 9.64E+00 4.37E+00 3.86E-02 1.75E-02

9.75 247.65 4359.7346 13.753 2.46E-01 1.00E+01 4.55E+00 3.81E-02 1.73E-02

10.00 254.00 4069.0856 12.836 2.55E-01 1.04E+01 4.71E+00 3.76E-02 1.71E-02

10.25 260.35 3778.4366 11.919 2.63E-01 1.07E+01 4.86E+00 3.72E-02 1.69E-02

10.50 266.70 3487.7876 11.002 2.70E-01 1.10E+01 5.00E+00 3.69E-02 1.67E-02

10.75 273.05 3197.1387 10.086 2.77E-01 1.13E+01 5.13E+00 3.65E-02 1.66E-02

11.00 279.40 2906.4897 9.1687 2.84E-01 1.16E+01 5.25E+00 3.62E-02 1.64E-02

11.25 285.75 2615.8407 8.2519 2.89E-01 1.18E+01 5.35E+00 3.59E-02 1.63E-02

11.50 292.10 2325.1918 7.335 2.95E-01 1.20E+01 5.45E+00 3.56E-02 1.62E-02

11.75 298.45 2034.5428 6.4181 2.99E-01 1.22E+01 5.53E+00 3.54E-02 1.61E-02

12.00 304.80 1743.8938 5.5012 3.03E-01 1.24E+01 5.60E+00 3.52E-02 1.60E-02

Results for RBHT Test 1648

Valid Time Period 2313 to 2470 seconds
A-493

Figure A-410 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648E for Time Period 2313 to 2470 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-494

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-F 

Test Conditions

Date: 6/24/2003

Steady-state time window: 2709 – 2862 seconds

Inlet flow rate: 1.008 cm/sec (0.397 in./sec) 

Inlet mass flow rate: 0.047 kg/sec (0.103 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-495

Figure A-411 Inlet Flow Plot for Experiment 1648F 

Figure A-412 Inlet Temperature Plot for Experiment 1648F 
A-496

Figure A-413 System Pressure Plot for Experiment 1648F 

Figure A-414 Bundle Power Plot for Experiment 1648F 
A-497

Table A-165: Data Results for RBHT Test 1648 for Time Period 2709 to 2862 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.663 19.272 922.770 0.201 9.624 0.043 2.059 0.000 0.000 19.02 910.682 4339.02 207753.3927 0.667 0.664 0.670

* 120-133 3048-3378 383 0.671 22.212 1063.510 0.223 10.677 0.077 3.687 -0.648 -31.033 22.56 1080.179 4361.58 208833.5713 0.666 0.663 0.669

* 108-120 2743-3048 382 0.558 27.530 1318.136 0.185 8.858 0.097 4.644 6.288 301.064 20.96 1003.570 4382.54 209837.1415 0.664 0.661 0.667

100-108 2540-2743 381 0.658 14.209 680.328 0.111 5.315 0.071 3.399 0.000 0.000 14.02 671.281 4396.56 210508.4227 0.662 0.659 0.665

97-100 2464-2540 380 0.501 7.780 372.490 0.039 1.867 0.026 1.245 0.000 0.000 7.714 369.348 4404.274 210877.771 0.505 0.502 0.508

93-97 2362-2464 379 0.540 9.556 457.531 0.049 2.346 0.033 1.580 0.000 0.000 9.471 453.474 4413.745 211331.2449 0.544 0.541 0.547

* 85-93 2159-2362 378 0.410 24.528 1174.412 0.091 4.357 0.064 3.064 7.613 364.517 16.76 802.473 4430.505 212133.718 0.597 0.594 0.600

81-85 2057-2159 377 0.646 7.359 352.348 0.042 2.011 0.031 1.484 0.000 0.000 7.286 348.856 4437.791 212482.5736 0.649 0.646 0.65278-81 1981-2057 376 0.491 7.935 379.949 0.030 1.436 0.022 1.053 0.000 0.000 7.882 377.392 4445.673 212859.9658 0.494 0.492 0.49675-78 1905-1981 375 0.500 7.795 373.236 0.028 1.341 0.022 1.053 0.000 0.000 7.741 370.641 4453.414 213230.6068 0.503 0.500 0.50672-75 1829-1905 374 0.414 9.125 436.892 0.027 1.293 0.021 1.005 0.000 0.000 9.076 434.561 4462.49 213665.1681 0.417 0.415 0.419

* 67-72 1702-1829 373 0.378 16.141 772.829 0.042 2.011 0.035 1.676 2.594 124.195 13.47 644.947 4475.96 214310.1151 0.481 0.479 0.483

63-67 1600-1702 372 0.542 9.514 455.541 0.031 1.484 0.027 1.293 0.000 0.000 9.455 452.708 4485.415 214762.823 0.545 0.542 0.54860-63 1524-1600 371 0.371 9.800 469.218 0.022 1.053 0.019 0.910 0.000 0.000 9.755 467.072 4495.17 215229.8949 0.374 0.372 0.37657-60 1448-1524 370 0.362 9.940 475.931 0.020 0.958 0.019 0.910 0.000 0.000 9.896 473.823 4505.066 215703.7179 0.365 0.363 0.36753-57 1346-1448 369 0.338 13.747 658.198 0.025 1.197 0.024 1.149 0.000 0.000 13.69 655.481 4518.756 216359.1986 0.341 0.339 0.343

* 46-53 1168-1346 368 0.271 26.502 1268.902 0.038 1.819 0.041 1.963 4.163 199.305 22.26 1065.815 4541.016 217425.0131 0.388 0.386 0.390

43-46 1092-1168 367 0.432 8.844 423.465 0.014 0.670 0.017 0.814 0.000 0.000 8.812 421.921 4549.828 217846.9339 0.434 0.432 0.43637-43 940-1092 366 0.299 21.833 1045.358 0.024 1.149 0.032 1.532 0.000 0.000 21.77 1042.353 4571.598 218889.2871 0.301 0.299 0.303

* 25-37 635-940 365 0.151 52.910 2533.327 0.031 1.484 0.057 2.729 1.632 78.124 51.19 2450.990 4622.788 221340.2775 0.178 0.177 0.179

13-25 330-635 364 0.055 58.887 2819.533 0.011 0.527 0.018 0.862 0.000 0.000 58.84 2817.274 4681.628 224157.5518 0.056 0.053 0.059

* 0-13 0-330 363 0.038 64.953 3109.965 0.001 0.048 0.000 0.000 -0.668 -31.985 65.62 3141.902 4747.248 227299.4543 0.028 0.027 0.029

Results for RBHT Test 1648

Valid Time Period 2709 to 2862 seconds

Collapsed Liquid Level = 86.596 inches = 2199.55 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-165 Data Results for RBHT Test 1648

F for Time Period 2709 to 2862 seconds
A-498

Table A-166 Energy Balance Results for RBHT Test 1648F for Time Period 2709 to 2862 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1744.6543 5.5036 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

0.25 6.35 1841.5795 5.8094 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

0.50 12.70 1938.5047 6.1152 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

0.75 19.05 2035.43 6.4209 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

1.00 25.40 2132.3552 6.7267 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

1.25 31.75 2229.2805 7.0324 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

1.50 38.10 2326.2057 7.3382 0.00E+00 0.00E+00 0.00E+00 3.35E-02 1.52E-02

1.75 44.45 2423.1309 7.6439 6.93E-04 1.87E-02 8.49E-03 3.34E-02 1.52E-02

2.00 50.80 2520.0562 7.9497 8.45E-03 2.29E-01 1.04E-01 3.32E-02 1.51E-02

2.25 57.15 2616.9814 8.2555 1.65E-02 4.47E-01 2.03E-01 3.29E-02 1.49E-02

2.50 63.50 2713.9066 8.5612 2.49E-02 6.73E-01 3.05E-01 3.26E-02 1.48E-02

2.75 69.85 2810.8319 8.867 3.36E-02 9.07E-01 4.11E-01 3.23E-02 1.47E-02

3.00 76.20 2907.7571 9.1727 4.25E-02 1.15E+00 5.22E-01 3.20E-02 1.45E-02

3.25 82.55 3004.6824 9.4785 5.18E-02 1.40E+00 6.35E-01 3.17E-02 1.44E-02

3.50 88.90 3101.6076 9.7842 6.14E-02 1.66E+00 7.53E-01 3.14E-02 1.42E-02

3.75 95.25 3198.5328 10.09 7.13E-02 1.93E+00 8.74E-01 3.11E-02 1.41E-02

4.00 101.60 3295.4581 10.396 8.15E-02 2.20E+00 9.99E-01 3.07E-02 1.39E-02

4.25 107.95 3392.3833 10.702 9.20E-02 2.49E+00 1.13E+00 3.04E-02 1.38E-02

4.50 114.30 3489.3085 11.007 1.03E-01 2.78E+00 1.26E+00 3.00E-02 1.36E-02

4.75 120.65 3586.2338 11.313 1.14E-01 3.08E+00 1.40E+00 2.97E-02 1.35E-02

5.00 127.00 3683.159 11.619 1.25E-01 3.39E+00 1.54E+00 2.93E-02 1.33E-02

5.25 133.35 3780.0842 11.925 1.37E-01 3.70E+00 1.68E+00 2.89E-02 1.31E-02

5.50 139.70 3877.0095 12.23 1.49E-01 4.03E+00 1.83E+00 2.85E-02 1.29E-02

5.75 146.05 3973.9347 12.536 1.61E-01 4.36E+00 1.98E+00 2.81E-02 1.27E-02

6.00 152.40 4070.86 12.842 1.74E-01 4.70E+00 2.13E+00 2.76E-02 1.25E-02

6.25 158.75 4167.7852 13.148 1.87E-01 5.05E+00 2.29E+00 2.72E-02 1.23E-02

6.50 165.10 4264.7104 13.453 2.00E-01 5.41E+00 2.45E+00 2.68E-02 1.21E-02

6.75 171.45 4361.6357 13.759 2.14E-01 5.78E+00 2.62E+00 2.63E-02 1.19E-02

7.00 177.80 4458.5609 14.065 2.28E-01 6.15E+00 2.79E+00 2.58E-02 1.17E-02

7.25 184.15 4555.4861 14.371 2.42E-01 6.53E+00 2.96E+00 2.54E-02 1.15E-02

7.50 190.50 4652.4114 14.676 2.56E-01 6.92E+00 3.14E+00 2.49E-02 1.13E-02

7.75 196.85 4749.3366 14.982 2.71E-01 7.32E+00 3.32E+00 2.44E-02 1.11E-02

8.00 203.20 4846.2619 15.288 2.86E-01 7.73E+00 3.51E+00 2.39E-02 1.08E-02

8.25 209.55 4943.1871 15.594 3.01E-01 8.15E+00 3.70E+00 2.34E-02 1.06E-02

8.50 215.90 5040.1123 15.899 3.17E-01 8.57E+00 3.89E+00 2.29E-02 1.04E-02

8.75 222.25 5137.0376 16.205 3.33E-01 9.00E+00 4.08E+00 2.23E-02 1.01E-02

9.00 228.60 5233.9628 16.511 3.49E-01 9.44E+00 4.28E+00 2.18E-02 9.88E-03

9.25 234.95 4943.1871 15.594 3.65E-01 9.87E+00 4.48E+00 2.12E-02 9.63E-03

9.50 241.30 4652.4114 14.676 3.80E-01 1.03E+01 4.66E+00 2.07E-02 9.41E-03

9.75 247.65 4361.6357 13.759 3.95E-01 1.07E+01 4.84E+00 2.03E-02 9.19E-03

10.00 254.00 4070.86 12.842 4.08E-01 1.10E+01 5.00E+00 1.98E-02 8.99E-03

10.25 260.35 3780.0842 11.925 4.20E-01 1.14E+01 5.15E+00 1.94E-02 8.80E-03

10.50 266.70 3489.3085 11.007 4.32E-01 1.17E+01 5.29E+00 1.90E-02 8.63E-03

10.75 273.05 3198.5328 10.09 4.42E-01 1.19E+01 5.42E+00 1.87E-02 8.47E-03

11.00 279.40 2907.7571 9.1727 4.52E-01 1.22E+01 5.54E+00 1.84E-02 8.32E-03

11.25 285.75 2616.9814 8.2555 4.60E-01 1.24E+01 5.64E+00 1.81E-02 8.19E-03

11.50 292.10 2326.2057 7.3382 4.68E-01 1.26E+01 5.74E+00 1.78E-02 8.08E-03

11.75 298.45 2035.43 6.4209 4.75E-01 1.28E+01 5.82E+00 1.76E-02 7.97E-03

12.00 304.80 1744.6543 5.5036 4.81E-01 1.30E+01 5.89E+00 1.74E-02 7.88E-03

Results for RBHT Test 1648

Valid Time Period 2709 to 2862 seconds
A-499

Figure A-415 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648F for Time Period 2709 to 2862 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-500

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-G 

Test Conditions

Date: 6/24/2003

Steady-state time window: 3285 – 3465 seconds

Inlet flow rate: 0.505 cm/sec (0.199 in./sec) 

Inlet mass flow rate: 0.024 kg/sec (0.052 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-501

Figure A-416 Inlet Flow Plot for Experiment 1648G 

Figure A-417 Inlet Temperature Plot for Experiment 1648G 
A-502

Figure A-418 System Pressure Plot for Experiment 1648G 

Figure A-419 Bundle Power Plot for Experiment 1648G 
A-503

Table A-167: Data Results for RBHT Test 1648 for Time Period 3285 to 3465 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.747 14.432 691.021 0.086 4.118 0.020 0.958 0.000 0.000 14.32 685.645 4334.32 207528.3555 0.749 0.745 0.753

* 120-133 3048-3378 383 0.714 19.340 926.002 0.106 5.075 0.039 1.867 1.345 64.397 17.85 854.663 4352.17 208383.0181 0.736 0.732 0.740

* 108-120 2743-3048 382 0.593 25.395 1215.937 0.091 4.357 0.049 2.346 7.065 338.292 18.19 870.942 4370.36 209253.96 0.708 0.704 0.712

100-108 2540-2743 381 0.692 12.791 612.445 0.055 2.633 0.035 1.676 0.000 0.000 12.7 608.079 4383.06 209862.0392 0.694 0.691 0.697

97-100 2464-2540 380 0.533 7.276 348.370 0.019 0.910 0.013 0.622 0.000 0.000 7.242 346.749 4390.302 210208.7881 0.535 0.532 0.538

93-97 2362-2464 379 0.564 9.068 434.157 0.025 1.197 0.017 0.814 0.000 0.000 9.024 432.071 4399.326 210640.8595 0.566 0.563 0.569

* 85-93 2159-2362 378 0.424 23.952 1146.811 0.045 2.155 0.032 1.532 8.095 387.573 15.78 755.550 4415.106 211396.41 0.62 0.617 0.623

81-85 2057-2159 377 0.673 6.793 325.245 0.021 1.005 0.015 0.718 0.000 0.000 6.754 323.383 4421.86 211719.7932 0.675 0.672 0.678

78-81 1981-2057 376 0.517 7.530 360.554 0.015 0.718 0.011 0.527 0.000 0.000 7.501 359.150 4429.361 212078.943 0.518 0.515 0.521

75-78 1905-1981 375 0.530 7.317 350.359 0.014 0.670 0.011 0.527 0.000 0.000 7.29 349.047 4436.651 212427.9901 0.532 0.529 0.535

72-75 1829-1905 374 0.469 8.268 395.863 0.013 0.622 0.011 0.527 0.000 0.000 8.241 394.581 4444.892 212822.5713 0.471 0.469 0.473

* 67-72 1702-1829 373 0.382 16.058 768.850 0.021 1.005 0.017 0.814 3.960 189.595 12.06 577.436 4456.952 213400.0072 0.535 0.532 0.538

63-67 1600-1702 372 0.598 8.346 399.593 0.016 0.766 0.013 0.622 0.000 0.000 8.312 397.981 4465.264 213797.9879 0.6 0.597 0.603

60-63 1524-1600 371 0.401 9.338 447.087 0.011 0.527 0.010 0.479 0.000 0.000 9.315 446.005 4474.579 214243.9925 0.402 0.400 0.404

57-60 1448-1524 370 0.390 9.509 455.293 0.010 0.479 0.009 0.431 0.000 0.000 9.485 454.144 4484.064 214698.1367 0.391 0.389 0.393

53-57 1346-1448 369 0.374 13.009 622.888 0.013 0.622 0.012 0.575 0.000 0.000 12.98 621.486 4497.044 215319.6225 0.375 0.373 0.377

* 46-53 1168-1346 368 0.288 25.878 1239.063 0.020 0.958 0.020 0.958 5.548 265.657 20.29 971.490 4517.334 216291.1129 0.442 0.440 0.444

43-46 1092-1168 367 0.507 7.676 367.516 0.008 0.383 0.008 0.383 0.000 0.000 7.657 366.619 4524.991 216657.732 0.508 0.505 0.511

37-43 940-1092 366 0.365 19.792 947.636 0.013 0.622 0.016 0.766 0.000 0.000 19.76 946.114 4544.751 217603.8459 0.366 0.364 0.368

* 25-37 635-940 365 0.227 48.184 2307.049 0.020 0.958 0.029 1.389 2.525 120.884 45.61 2183.819 4590.361 219787.6644 0.268 0.267 0.269

13-25 330-635 364 0.169 51.762 2478.374 0.011 0.527 0.025 1.197 0.000 0.000 51.71 2475.888 4642.071 222263.5525 0.17 0.169 0.171

* 0-13 0-330 363 0.042 64.647 3095.294 0.003 0.144 0.003 0.144 2.891 138.401 61.75 2956.606 4703.821 225220.1584 0.085 0.081 0.089

Results for RBHT Test 1648

Valid Time Period 3285 to 3465 seconds

Collapsed Liquid Level = 79.867 inches = 2028.62 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-167 Data Results for RBHT Test 1648

G for Time Period 3285 to 3465 seconds
A-504

Table A-168 Energy Balance Results for RBHT Test 1648G for Time Period 3285 to 3465 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1745.281 5.5056 0.00E+00 0.00E+00 0.00E+00 1.68E-02 7.61E-03

0.25 6.35 1842.2411 5.8115 0.00E+00 0.00E+00 0.00E+00 1.68E-02 7.61E-03

0.50 12.70 1939.2011 6.1173 0.00E+00 0.00E+00 0.00E+00 1.68E-02 7.61E-03

0.75 19.05 2036.1612 6.4232 0.00E+00 0.00E+00 0.00E+00 1.68E-02 7.61E-03

1.00 25.40 2133.1213 6.7291 3.31E-03 4.49E-02 2.03E-02 1.67E-02 7.59E-03

1.25 31.75 2230.0813 7.035 1.70E-02 2.30E-01 1.04E-01 1.65E-02 7.48E-03

1.50 38.10 2327.0414 7.3408 3.12E-02 4.24E-01 1.92E-01 1.63E-02 7.37E-03

1.75 44.45 2424.0014 7.6467 4.61E-02 6.25E-01 2.84E-01 1.60E-02 7.26E-03

2.00 50.80 2520.9615 7.9526 6.16E-02 8.35E-01 3.79E-01 1.57E-02 7.14E-03

2.25 57.15 2617.9215 8.2584 7.77E-02 1.05E+00 4.78E-01 1.55E-02 7.02E-03

2.50 63.50 2714.8816 8.5643 9.44E-02 1.28E+00 5.81E-01 1.52E-02 6.89E-03

2.75 69.85 2811.8417 8.8702 1.12E-01 1.52E+00 6.87E-01 1.49E-02 6.76E-03

3.00 76.20 2908.8017 9.176 1.30E-01 1.76E+00 7.97E-01 1.46E-02 6.63E-03

3.25 82.55 3005.7618 9.4819 1.48E-01 2.01E+00 9.11E-01 1.43E-02 6.48E-03

3.50 88.90 3102.7218 9.7878 1.67E-01 2.27E+00 1.03E+00 1.40E-02 6.34E-03

3.75 95.25 3199.6819 10.094 1.87E-01 2.54E+00 1.15E+00 1.36E-02 6.19E-03

4.00 101.60 3296.6419 10.399 2.07E-01 2.81E+00 1.28E+00 1.33E-02 6.03E-03

4.25 107.95 3393.602 10.705 2.28E-01 3.10E+00 1.40E+00 1.30E-02 5.87E-03

4.50 114.30 3490.5621 11.011 2.50E-01 3.39E+00 1.54E+00 1.26E-02 5.71E-03

4.75 120.65 3587.5221 11.317 2.72E-01 3.69E+00 1.67E+00 1.22E-02 5.54E-03

5.00 127.00 3684.4822 11.623 2.95E-01 4.00E+00 1.81E+00 1.18E-02 5.37E-03

5.25 133.35 3781.4422 11.929 3.18E-01 4.32E+00 1.96E+00 1.14E-02 5.19E-03

5.50 139.70 3878.4023 12.235 3.42E-01 4.64E+00 2.10E+00 1.10E-02 5.01E-03

5.75 146.05 3975.3623 12.541 3.67E-01 4.97E+00 2.26E+00 1.06E-02 4.82E-03

6.00 152.40 4072.3224 12.846 3.92E-01 5.32E+00 2.41E+00 1.02E-02 4.63E-03

6.25 158.75 4169.2825 13.152 4.18E-01 5.67E+00 2.57E+00 9.77E-03 4.43E-03

6.50 165.10 4266.2425 13.458 4.44E-01 6.02E+00 2.73E+00 9.33E-03 4.23E-03

6.75 171.45 4363.2026 13.764 4.71E-01 6.39E+00 2.90E+00 8.88E-03 4.03E-03

7.00 177.80 4460.1626 14.07 4.99E-01 6.76E+00 3.07E+00 8.41E-03 3.82E-03

7.25 184.15 4557.1227 14.376 5.27E-01 7.15E+00 3.24E+00 7.94E-03 3.60E-03

7.50 190.50 4654.0827 14.682 5.56E-01 7.54E+00 3.42E+00 7.45E-03 3.38E-03

7.75 196.85 4751.0428 14.988 5.85E-01 7.94E+00 3.60E+00 6.96E-03 3.16E-03

8.00 203.20 4848.0029 15.293 6.15E-01 8.35E+00 3.79E+00 6.46E-03 2.93E-03

8.25 209.55 4944.9629 15.599 6.46E-01 8.76E+00 3.97E+00 5.94E-03 2.70E-03

8.50 215.90 5041.923 15.905 6.77E-01 9.19E+00 4.17E+00 5.42E-03 2.46E-03

8.75 222.25 5138.883 16.211 7.09E-01 9.62E+00 4.36E+00 4.88E-03 2.21E-03

9.00 228.60 5235.8431 16.517 7.42E-01 1.01E+01 4.56E+00 4.34E-03 1.97E-03

9.25 234.95 4944.9629 15.599 7.73E-01 1.05E+01 4.76E+00 3.80E-03 1.72E-03

9.50 241.30 4654.0827 14.682 8.04E-01 1.09E+01 4.94E+00 3.30E-03 1.50E-03

9.75 247.65 4363.2026 13.764 8.32E-01 1.13E+01 5.12E+00 2.82E-03 1.28E-03

10.00 254.00 4072.3224 12.846 8.58E-01 1.16E+01 5.28E+00 2.38E-03 1.08E-03

10.25 260.35 3781.4422 11.929 8.83E-01 1.20E+01 5.43E+00 1.97E-03 8.93E-04

10.50 266.70 3490.5621 11.011 9.06E-01 1.23E+01 5.57E+00 1.59E-03 7.19E-04

10.75 273.05 3199.6819 10.094 9.26E-01 1.26E+01 5.70E+00 1.24E-03 5.60E-04

11.00 279.40 2908.8017 9.176 9.46E-01 1.28E+01 5.82E+00 9.13E-04 4.14E-04

11.25 285.75 2617.9215 8.2584 9.63E-01 1.31E+01 5.92E+00 6.23E-04 2.82E-04

11.50 292.10 2327.0414 7.3408 9.78E-01 1.33E+01 6.02E+00 3.64E-04 1.65E-04

11.75 298.45 2036.1612 6.4232 9.92E-01 1.35E+01 6.10E+00 1.34E-04 6.09E-05

12.00 304.80 1745.281 5.5056 1.00E+00 1.36E+01 6.15E+00 0.00E+00 0.00E+00

Results for RBHT Test 1648

Valid Time Period 3285 to 3465 seconds
A-505

Figure A-420 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648G for Time Period 3285 to 3465 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-506

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-H 

Test Conditions

Date: 6/24/2003

Steady-state time window: 4005 – 4080 seconds

Inlet flow rate: 0.384 cm/sec (0.151 in./sec) 

Inlet mass flow rate: 0.018 kg/sec (0.039 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-507

Figure A-421 Inlet Flow Plot for Experiment 1648H 

Figure A-422 Inlet Temperature Plot for Experiment 1648H 
A-508

Figure A-423 System Pressure Plot for Experiment 1648H 

Figure A-424 Bundle Power Plot for Experiment 1648H 
A-509

Table A-169: Data Results for RBHT Test 1648 for Time Period 4005 to 4080 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.985 0.831 39.785 0.031 1.484 0.000 0.000 0.000 0.000 0.798 38.208 4320.798 206880.9187 0.986 0.981 0.991

* 120-133 3048-3378 383 0.947 3.604 172.569 0.036 1.724 0.000 0.000 -1.213 -58.071 4.781 228.916 4325.579 207109.8342 0.929 0.924 0.934

* 108-120 2743-3048 382 0.769 14.396 689.280 0.049 2.346 0.002 0.096 2.845 136.215 11.5 550.623 4337.079 207660.4571 0.815 0.811 0.819

100-108 2540-2743 381 0.757 10.096 483.391 0.038 1.819 0.027 1.293 0.000 0.000 10.03 480.239 4347.109 208140.6961 0.759 0.755 0.763

97-100 2464-2540 380 0.674 5.074 242.939 0.014 0.670 0.010 0.479 0.000 0.000 5.047 241.652 4352.156 208382.3478 0.676 0.673 0.679

93-97 2362-2464 379 0.660 7.068 338.424 0.018 0.862 0.013 0.622 0.000 0.000 7.034 336.790 4359.19 208719.1375 0.661 0.658 0.664

* 85-93 2159-2362 378 0.459 22.492 1076.938 0.034 1.628 0.024 1.149 8.964 429.214 13.47 644.947 4372.66 209364.0846 0.676 0.673 0.679

81-85 2057-2159 377 0.689 6.461 309.331 0.016 0.766 0.012 0.575 0.000 0.000 6.432 307.966 4379.092 209672.0504 0.69 0.687 0.693

78-81 1981-2057 376 0.526 7.385 353.592 0.011 0.527 0.009 0.431 0.000 0.000 7.364 352.590 4386.456 210024.6406 0.527 0.524 0.530

75-78 1905-1981 375 0.543 7.115 340.661 0.011 0.527 0.008 0.383 0.000 0.000 7.095 339.710 4393.551 210364.351 0.545 0.542 0.548

72-75 1829-1905 374 0.485 8.019 383.928 0.010 0.479 0.008 0.383 0.000 0.000 7.998 382.946 4401.549 210747.2973 0.487 0.485 0.489

* 67-72 1702-1829 373 0.380 16.094 770.591 0.016 0.766 0.013 0.622 4.345 208.046 11.72 561.157 4413.269 211308.4539 0.548 0.545 0.551

63-67 1600-1702 372 0.609 8.117 388.652 0.012 0.575 0.010 0.479 0.000 0.000 8.094 387.543 4421.363 211695.9967 0.61 0.607 0.613

60-63 1524-1600 371 0.418 9.062 433.908 0.008 0.383 0.007 0.335 0.000 0.000 9.044 433.029 4430.407 212129.0258 0.419 0.417 0.421

57-60 1448-1524 370 0.401 9.338 447.087 0.008 0.383 0.007 0.335 0.000 0.000 9.318 446.148 4439.725 212575.174 0.402 0.400 0.404

53-57 1346-1448 369 0.384 12.802 612.942 0.010 0.479 0.009 0.431 0.000 0.000 12.78 611.910 4452.505 213187.0837 0.385 0.383 0.387

* 46-53 1168-1346 368 0.284 26.034 1246.522 0.015 0.718 0.015 0.718 6.124 293.227 19.88 951.860 4472.385 214138.9432 0.453 0.451 0.455

43-46 1092-1168 367 0.520 7.473 357.819 0.006 0.287 0.006 0.287 0.000 0.000 7.458 357.091 4479.843 214496.0342 0.521 0.518 0.524

37-43 940-1092 366 0.388 19.065 912.823 0.010 0.479 0.012 0.575 0.000 0.000 19.04 911.640 4498.883 215407.6743 0.389 0.387 0.391

* 25-37 635-940 365 0.238 47.462 2272.485 0.016 0.766 0.022 1.053 3.834 183.565 43.59 2087.100 4542.473 217494.7747 0.3 0.299 0.302

13-25 330-635 364 0.211 49.144 2353.050 0.009 0.431 0.019 0.910 0.000 0.000 49.1 2350.921 4591.573 219845.6953 0.212 0.211 0.213

* 0-13 0-330 363 0.046 64.392 3083.110 0.003 0.144 0.006 0.287 4.043 193.585 60.34 2889.095 4651.913 222734.79 0.106 0.105 0.107

 (Z2φ) Two-Phase Level (Dryout) = 124.70 inches = 3167.38 mm

 (S) Level Swell = 1.924

Results for RBHT Test 1648

Valid Time Period 4005 to 4080 seconds

Collapsed Liquid Level = 69.0923 inches = 1754.94 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-169 Data Results for RBHT Test 1648

H for Time Period 4005 to 4080 seconds
A-510

Table A-170 Energy Balance Results for RBHT Test 1648H for Time Period 4005 to 4080 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1747.7312 5.5133 0.00E+00 0.00E+00 0.00E+00 1.27E-02 5.77E-03

0.25 6.35 1844.8274 5.8196 0.00E+00 0.00E+00 0.00E+00 1.27E-02 5.77E-03

0.50 12.70 1941.9235 6.1259 0.00E+00 0.00E+00 0.00E+00 1.27E-02 5.77E-03

0.75 19.05 2039.0197 6.4322 6.77E-04 6.96E-03 3.16E-03 1.27E-02 5.77E-03

1.00 25.40 2136.1159 6.7385 1.79E-02 1.84E-01 8.36E-02 1.25E-02 5.67E-03

1.25 31.75 2233.2121 7.0448 3.60E-02 3.70E-01 1.68E-01 1.23E-02 5.56E-03

1.50 38.10 2330.3082 7.3511 5.48E-02 5.64E-01 2.56E-01 1.20E-02 5.46E-03

1.75 44.45 2427.4044 7.6574 7.45E-02 7.66E-01 3.47E-01 1.18E-02 5.34E-03

2.00 50.80 2524.5006 7.9637 9.49E-02 9.76E-01 4.43E-01 1.15E-02 5.22E-03

2.25 57.15 2621.5968 8.27 1.16E-01 1.19E+00 5.42E-01 1.12E-02 5.10E-03

2.50 63.50 2718.693 8.5763 1.38E-01 1.42E+00 6.45E-01 1.10E-02 4.97E-03

2.75 69.85 2815.7891 8.8826 1.61E-01 1.66E+00 7.51E-01 1.07E-02 4.84E-03

3.00 76.20 2912.8853 9.1889 1.85E-01 1.90E+00 8.62E-01 1.04E-02 4.71E-03

3.25 82.55 3009.9815 9.4952 2.09E-01 2.15E+00 9.76E-01 1.01E-02 4.56E-03

3.50 88.90 3107.0777 9.8015 2.34E-01 2.41E+00 1.09E+00 9.74E-03 4.42E-03

3.75 95.25 3204.1738 10.108 2.61E-01 2.68E+00 1.22E+00 9.41E-03 4.27E-03

4.00 101.60 3301.27 10.414 2.87E-01 2.96E+00 1.34E+00 9.07E-03 4.11E-03

4.25 107.95 3398.3662 10.72 3.15E-01 3.24E+00 1.47E+00 8.72E-03 3.95E-03

4.50 114.30 3495.4624 11.027 3.44E-01 3.53E+00 1.60E+00 8.35E-03 3.79E-03

4.75 120.65 3592.5585 11.333 3.73E-01 3.83E+00 1.74E+00 7.98E-03 3.62E-03

5.00 127.00 3689.6547 11.639 4.03E-01 4.14E+00 1.88E+00 7.60E-03 3.45E-03

5.25 133.35 3786.7509 11.946 4.34E-01 4.46E+00 2.02E+00 7.21E-03 3.27E-03

5.50 139.70 3883.8471 12.252 4.65E-01 4.79E+00 2.17E+00 6.80E-03 3.09E-03

5.75 146.05 3980.9433 12.558 4.98E-01 5.12E+00 2.32E+00 6.39E-03 2.90E-03

6.00 152.40 4078.0394 12.864 5.31E-01 5.46E+00 2.48E+00 5.97E-03 2.71E-03

6.25 158.75 4175.1356 13.171 5.65E-01 5.81E+00 2.64E+00 5.53E-03 2.51E-03

6.50 165.10 4272.2318 13.477 6.00E-01 6.17E+00 2.80E+00 5.09E-03 2.31E-03

6.75 171.45 4369.328 13.783 6.36E-01 6.54E+00 2.97E+00 4.64E-03 2.10E-03

7.00 177.80 4466.4241 14.09 6.72E-01 6.91E+00 3.14E+00 4.17E-03 1.89E-03

7.25 184.15 4563.5203 14.396 7.10E-01 7.30E+00 3.31E+00 3.70E-03 1.68E-03

7.50 190.50 4660.6165 14.702 7.48E-01 7.69E+00 3.49E+00 3.21E-03 1.46E-03

7.75 196.85 4757.7127 15.009 7.87E-01 8.09E+00 3.67E+00 2.72E-03 1.23E-03

8.00 203.20 4854.8088 15.315 8.26E-01 8.50E+00 3.85E+00 2.21E-03 1.00E-03

8.25 209.55 4951.905 15.621 8.67E-01 8.92E+00 4.04E+00 1.70E-03 7.69E-04

8.50 215.90 5049.0012 15.927 9.08E-01 9.34E+00 4.24E+00 1.17E-03 5.31E-04

8.75 222.25 5146.0974 16.234 9.50E-01 9.77E+00 4.43E+00 6.36E-04 2.89E-04

9.00 228.60 5243.1936 16.54 9.93E-01 1.02E+01 4.63E+00 9.03E-05 4.10E-05

9.25 234.95 4951.905 15.621 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

9.50 241.30 4660.6165 14.702 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

9.75 247.65 4369.328 13.783 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

10.00 254.00 4078.0394 12.864 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

10.25 260.35 3786.7509 11.946 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

10.50 266.70 3495.4624 11.027 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

10.75 273.05 3204.1738 10.108 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

11.00 279.40 2912.8853 9.1889 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

11.25 285.75 2621.5968 8.27 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

11.50 292.10 2330.3082 7.3511 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

11.75 298.45 2039.0197 6.4322 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

12.00 304.80 1747.7312 5.5133 1.00E+00 1.03E+01 4.67E+00 0.00E+00 0.00E+00

Results for RBHT Test 1648

Valid Time Period 4005 to 4080 seconds
A-511

Figure A-425 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648H for Time Period 4005 to 4080 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-512

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-I 

Test Conditions

Date: 6/24/2003

Steady-state time window: 4380 – 4440 seconds

Inlet flow rate: 0.376 cm/sec (0.148 in./sec) 

Inlet mass flow rate: 0.018 kg/sec (0.039 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-513

Figure A-426 Inlet Flow Plot for Experiment 1648I 

Figure A-427 Inlet Temperature Plot for Experiment 1648I 
A-514

Figure A-428 System Pressure Plot for Experiment 1648I 

Figure A-429 Bundle Power Plot for Experiment 1648I 
A-515

Table A-171: Data Results for RBHT Test 1648 for Time Period 4380 to 4440 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.979 1.189 56.943 0.030 1.436 0.000 0.000 0.000 0.000 1.158 55.445 4321.158 206898.1556 0.98 0.975 0.985

* 120-133 3048-3378 383 0.980 1.345 64.402 0.035 1.676 0.000 0.000 -3.203 -153.357 4.513 216.084 4325.671 207114.2392 0.933 0.928 0.938

* 108-120 2743-3048 382 0.873 7.889 377.711 0.032 1.532 0.000 0.000 -2.113 -101.187 9.97 477.366 4335.641 207591.6053 0.84 0.836 0.844

100-108 2540-2743 381 0.792 8.647 414.016 0.037 1.772 0.024 1.149 0.000 0.000 8.581 410.860 4344.222 208002.4658 0.793 0.789 0.797

97-100 2464-2540 380 0.689 4.851 232.247 0.014 0.670 0.010 0.479 0.000 0.000 4.825 231.022 4349.047 208233.4881 0.69 0.687 0.693

93-97 2362-2464 379 0.691 6.424 307.590 0.018 0.862 0.012 0.575 0.000 0.000 6.391 306.003 4355.438 208539.4908 0.692 0.689 0.695

* 85-93 2159-2362 378 0.494 21.017 1006.319 0.033 1.580 0.024 1.149 8.190 392.159 12.77 611.431 4368.208 209150.9217 0.693 0.690 0.696

81-85 2057-2159 377 0.692 6.409 306.844 0.015 0.718 0.011 0.527 0.000 0.000 6.378 305.380 4374.586 209456.3019 0.693 0.690 0.696

78-81 1981-2057 376 0.530 7.323 350.608 0.011 0.527 0.008 0.383 0.000 0.000 7.299 349.478 4381.885 209805.7799 0.531 0.528 0.534

75-78 1905-1981 375 0.539 7.177 343.645 0.010 0.479 0.008 0.383 0.000 0.000 7.155 342.583 4389.04 210148.3632 0.541 0.538 0.544

72-75 1829-1905 374 0.488 7.977 381.939 0.010 0.479 0.008 0.383 0.000 0.000 7.957 380.983 4396.997 210529.3464 0.489 0.487 0.491

* 67-72 1702-1829 373 0.381 16.063 769.099 0.016 0.766 0.013 0.622 4.414 211.342 11.62 556.369 4408.617 211085.715 0.553 0.550 0.556

63-67 1600-1702 372 0.615 8.003 383.182 0.011 0.527 0.010 0.479 0.000 0.000 7.978 381.989 4416.595 211467.7037 0.616 0.613 0.619

60-63 1524-1600 371 0.412 9.156 438.384 0.008 0.383 0.007 0.335 0.000 0.000 9.136 437.434 4425.731 211905.1377 0.413 0.411 0.415

57-60 1448-1524 370 0.399 9.358 448.082 0.008 0.383 0.007 0.335 0.000 0.000 9.342 447.297 4435.073 212352.4351 0.4 0.398 0.402

53-57 1346-1448 369 0.392 12.630 604.736 0.009 0.431 0.009 0.431 0.000 0.000 12.61 603.770 4447.683 212956.2051 0.393 0.391 0.395

* 46-53 1168-1346 368 0.280 26.164 1252.739 0.015 0.718 0.015 0.718 6.534 312.849 19.6 938.453 4467.283 213894.6581 0.461 0.459 0.463

43-46 1092-1168 367 0.528 7.359 352.348 0.006 0.287 0.006 0.287 0.000 0.000 7.345 351.680 4474.628 214246.3386 0.528 0.525 0.531

37-43 940-1092 366 0.386 19.127 915.807 0.010 0.479 0.012 0.575 0.000 0.000 19.1 914.513 4493.728 215160.8515 0.387 0.385 0.389

* 25-37 635-940 365 0.245 47.072 2253.836 0.015 0.718 0.021 1.005 3.436 164.533 43.6 2087.579 4537.328 217248.4307 0.3 0.299 0.302

13-25 330-635 364 0.213 49.046 2348.326 0.009 0.431 0.018 0.862 0.000 0.000 49 2346.133 4586.328 219594.5633 0.213 0.212 0.214

* 0-13 0-330 363 0.048 64.288 3078.137 0.003 0.144 0.006 0.287 3.989 191.005 60.29 2886.701 4646.618 222481.264 0.107 0.106 0.108

 (Z2φ) Two-Phase Level (Dryout) = 118.60 inches = 3012.44 mm

 (S) Level Swell = 1.885

Results for RBHT Test 1648

Valid Time Period 4380 to 4440 seconds

Collapsed Liquid Level = 67.063 inches = 1703.40 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-171 Data Results for RBHT Test 1648I for Time Period 4380 to 4440 seconds
A-516

Table A-172 Energy Balance Results for RBHT Test 1648I for Time Period 4380 to 4440 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1749.3849 5.5186 0.00E+00 0.00E+00 0.00E+00 1.25E-02 5.67E-03

0.25 6.35 1846.5729 5.8251 0.00E+00 0.00E+00 0.00E+00 1.25E-02 5.67E-03

0.50 12.70 1943.761 6.1317 0.00E+00 0.00E+00 0.00E+00 1.25E-02 5.67E-03

0.75 19.05 2040.949 6.4383 8.47E-04 8.55E-03 3.88E-03 1.25E-02 5.66E-03

1.00 25.40 2138.1371 6.7449 1.84E-02 1.86E-01 8.43E-02 1.23E-02 5.56E-03

1.25 31.75 2235.3251 7.0515 3.68E-02 3.71E-01 1.68E-01 1.20E-02 5.46E-03

1.50 38.10 2332.5132 7.3581 5.60E-02 5.65E-01 2.56E-01 1.18E-02 5.35E-03

1.75 44.45 2429.7012 7.6647 7.60E-02 7.67E-01 3.48E-01 1.15E-02 5.24E-03

2.00 50.80 2526.8893 7.9713 9.69E-02 9.78E-01 4.43E-01 1.13E-02 5.12E-03

2.25 57.15 2624.0773 8.2778 1.19E-01 1.20E+00 5.42E-01 1.10E-02 5.00E-03

2.50 63.50 2721.2654 8.5844 1.41E-01 1.42E+00 6.45E-01 1.07E-02 4.87E-03

2.75 69.85 2818.4534 8.891 1.64E-01 1.66E+00 7.52E-01 1.04E-02 4.74E-03

3.00 76.20 2915.6415 9.1976 1.88E-01 1.90E+00 8.62E-01 1.01E-02 4.60E-03

3.25 82.55 3012.8295 9.5042 2.13E-01 2.15E+00 9.76E-01 9.83E-03 4.46E-03

3.50 88.90 3110.0176 9.8108 2.39E-01 2.41E+00 1.09E+00 9.51E-03 4.31E-03

3.75 95.25 3207.2056 10.117 2.66E-01 2.68E+00 1.22E+00 9.18E-03 4.16E-03

4.00 101.60 3304.3937 10.424 2.93E-01 2.96E+00 1.34E+00 8.84E-03 4.01E-03

4.25 107.95 3401.5817 10.731 3.21E-01 3.24E+00 1.47E+00 8.48E-03 3.85E-03

4.50 114.30 3498.7698 11.037 3.50E-01 3.53E+00 1.60E+00 8.12E-03 3.68E-03

4.75 120.65 3595.9578 11.344 3.80E-01 3.83E+00 1.74E+00 7.75E-03 3.51E-03

5.00 127.00 3693.1459 11.65 4.11E-01 4.14E+00 1.88E+00 7.36E-03 3.34E-03

5.25 133.35 3790.3339 11.957 4.42E-01 4.46E+00 2.02E+00 6.97E-03 3.16E-03

5.50 139.70 3887.522 12.263 4.74E-01 4.79E+00 2.17E+00 6.57E-03 2.98E-03

5.75 146.05 3984.71 12.57 5.08E-01 5.12E+00 2.32E+00 6.15E-03 2.79E-03

6.00 152.40 4081.8981 12.877 5.41E-01 5.46E+00 2.48E+00 5.73E-03 2.60E-03

6.25 158.75 4179.0861 13.183 5.76E-01 5.81E+00 2.64E+00 5.30E-03 2.40E-03

6.50 165.10 4276.2742 13.49 6.12E-01 6.17E+00 2.80E+00 4.85E-03 2.20E-03

6.75 171.45 4373.4622 13.796 6.48E-01 6.54E+00 2.97E+00 4.40E-03 1.99E-03

7.00 177.80 4470.6503 14.103 6.85E-01 6.92E+00 3.14E+00 3.93E-03 1.78E-03

7.25 184.15 4567.8383 14.41 7.23E-01 7.30E+00 3.31E+00 3.46E-03 1.57E-03

7.50 190.50 4665.0264 14.716 7.62E-01 7.69E+00 3.49E+00 2.97E-03 1.35E-03

7.75 196.85 4762.2144 15.023 8.02E-01 8.09E+00 3.67E+00 2.48E-03 1.12E-03

8.00 203.20 4859.4025 15.329 8.42E-01 8.50E+00 3.85E+00 1.97E-03 8.94E-04

8.25 209.55 4956.5905 15.636 8.84E-01 8.92E+00 4.04E+00 1.46E-03 6.60E-04

8.50 215.90 5053.7786 15.943 9.26E-01 9.34E+00 4.24E+00 9.31E-04 4.22E-04

8.75 222.25 5150.9666 16.249 9.68E-01 9.77E+00 4.43E+00 3.95E-04 1.79E-04

9.00 228.60 5248.1547 16.556 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

9.25 234.95 4956.5905 15.636 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

9.50 241.30 4665.0264 14.716 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

9.75 247.65 4373.4622 13.796 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

10.00 254.00 4081.8981 12.877 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

10.25 260.35 3790.3339 11.957 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

10.50 266.70 3498.7698 11.037 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

10.75 273.05 3207.2056 10.117 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

11.00 279.40 2915.6415 9.1976 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

11.25 285.75 2624.0773 8.2778 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

11.50 292.10 2332.5132 7.3581 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

11.75 298.45 2040.949 6.4383 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

12.00 304.80 1749.3849 5.5186 1.00E+00 1.01E+01 4.58E+00 0.00E+00 0.00E+00

Results for RBHT Test 1648

Valid Time Period 4380 to 4440 seconds
A-517

Figure A-430 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648I for Time Period 4380 to 4440 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-518

RBHT Two-Phase Mixture Level and Uncovery Test INT-1648-J 

Test Conditions

Date: 6/24/2003

Steady-state time window: 5510 – 5660 seconds

Inlet flow rate: 0.381 cm/sec (0.150 in./sec) 

Inlet mass flow rate: 0.018 kg/sec (0.039 lbm/sec) 

Inlet flow temperature: 370.5 K (207.3 oF)

Upper plenum pressure: 202.7 kPa (29.4 psia)

Bundle power: 54.12 kW 
A-519

Figure A-431 Inlet Flow Plot for Experiment 1648J 

Figure A-432 Inlet Temperature Plot for Experiment 1648J 
A-520

Figure A-433 System Pressure Plot for Experiment 1648J 

Figure A-434 Bundle Power Plot for Experiment 1648J 
A-521

Table A-173: Data Results for RBHT Test 1648 for Time Period 5510 to 5660 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.990 0.571 27.352 0.030 1.436 0.000 0.000 0.000 0.000 0.54 25.855 4320.54 206868.5656 0.991 0.986 0.996

* 120-133 3048-3378 383 0.977 1.558 74.597 0.036 1.724 0.000 0.000 -2.274 -108.880 3.796 181.753 4324.336 207050.319 0.944 0.939 0.949

* 108-120 2743-3048 382 0.888 6.980 334.196 0.033 1.580 0.000 0.000 -2.387 -114.298 9.334 446.914 4333.67 207497.2334 0.85 0.846 0.854

100-108 2540-2743 381 0.802 8.231 394.123 0.038 1.819 0.027 1.293 0.000 0.000 8.166 390.990 4341.836 207888.2235 0.803 0.799 0.807

97-100 2464-2540 380 0.697 4.726 226.279 0.014 0.670 0.010 0.479 0.000 0.000 4.701 225.085 4346.537 208113.3086 0.698 0.695 0.701

93-97 2362-2464 379 0.692 6.398 306.347 0.018 0.862 0.013 0.622 0.000 0.000 6.368 304.901 4352.905 208418.2101 0.693 0.690 0.696

* 85-93 2159-2362 378 0.501 20.737 992.891 0.034 1.628 0.024 1.149 7.999 382.993 12.68 607.122 4365.585 209025.3318 0.695 0.692 0.698

81-85 2057-2159 377 0.695 6.341 303.611 0.016 0.766 0.012 0.575 0.000 0.000 6.313 302.268 4371.898 209327.5998 0.696 0.693 0.699

78-81 1981-2057 376 0.532 7.286 348.867 0.011 0.527 0.008 0.383 0.000 0.000 7.264 347.802 4379.162 209675.402 0.534 0.531 0.537

75-78 1905-1981 375 0.542 7.136 341.656 0.011 0.527 0.008 0.383 0.000 0.000 7.117 340.764 4386.279 210016.1658 0.543 0.540 0.546

72-75 1829-1905 374 0.480 8.102 387.906 0.010 0.479 0.008 0.383 0.000 0.000 8.082 386.968 4394.361 210403.134 0.481 0.479 0.483

* 67-72 1702-1829 373 0.384 16.001 766.115 0.016 0.766 0.013 0.622 4.232 202.612 11.74 562.114 4406.101 210965.2482 0.548 0.545 0.551

63-67 1600-1702 372 0.614 8.029 384.425 0.012 0.575 0.010 0.479 0.000 0.000 8.007 383.377 4414.108 211348.6255 0.614 0.611 0.617

60-63 1524-1600 371 0.420 9.042 432.914 0.008 0.383 0.007 0.335 0.000 0.000 9.022 431.976 4423.13 211780.6011 0.421 0.419 0.423

57-60 1448-1524 370 0.401 9.338 447.087 0.008 0.383 0.007 0.335 0.000 0.000 9.317 446.100 4432.447 212226.7015 0.402 0.400 0.404

53-57 1346-1448 369 0.388 12.713 608.715 0.010 0.479 0.009 0.431 0.000 0.000 12.69 607.600 4445.137 212834.302 0.389 0.387 0.391

* 46-53 1168-1346 368 0.287 25.935 1241.798 0.015 0.718 0.015 0.718 6.145 294.248 19.76 946.114 4464.897 213780.4158 0.456 0.454 0.458

43-46 1092-1168 367 0.523 7.437 356.078 0.006 0.287 0.006 0.287 0.000 0.000 7.421 355.319 4472.318 214135.7352 0.524 0.521 0.527

37-43 940-1092 366 0.381 19.278 923.018 0.010 0.479 0.012 0.575 0.000 0.000 19.25 921.695 4491.568 215057.4302 0.382 0.380 0.384

* 25-37 635-940 365 0.243 47.202 2260.052 0.015 0.718 0.022 1.053 3.375 161.604 43.79 2096.676 4535.358 217154.1066 0.297 0.296 0.298

13-25 330-635 364 0.212 49.134 2352.553 0.009 0.431 0.019 0.910 0.000 0.000 49.09 2350.442 4584.448 219504.5484 0.212 0.211 0.213

* 0-13 0-330 363 0.046 64.423 3084.602 0.003 0.144 0.006 0.287 4.074 195.077 60.34 2889.095 4644.788 222393.6432 0.106 0.105 0.107

 (Z2φ) Two-Phase Level (Dryout) = 117.40 inches = 2981.96 mm

 (S) Level Swell = 1.879

Results for RBHT Test 1648

Valid Time Period 5510 to 5660 seconds

Collapsed Liquid Level = 66.686 inches = 1693.82 mm

 (Zosv) Onset of Significant Void = 6.5 inches = 165 mm

Table A-173 Data Results for RBHT Test 1648

J for Time Period 5510 to 5660 seconds
A-522

Table A-174 Energy Balance Results for RBHT Test 1648J for Time Period 5510 to 5660 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 1749.4291 5.5187 0.00E+00 0.00E+00 0.00E+00 1.26E-02 5.73E-03

0.25 6.35 1846.6196 5.8253 0.00E+00 0.00E+00 0.00E+00 1.26E-02 5.73E-03

0.50 12.70 1943.8101 6.1319 0.00E+00 0.00E+00 0.00E+00 1.26E-02 5.73E-03

0.75 19.05 2041.0006 6.4385 1.65E-04 1.68E-03 7.64E-04 1.26E-02 5.73E-03

1.00 25.40 2138.1911 6.7451 1.76E-02 1.79E-01 8.13E-02 1.24E-02 5.63E-03

1.25 31.75 2235.3816 7.0517 3.58E-02 3.65E-01 1.66E-01 1.22E-02 5.52E-03

1.50 38.10 2332.5721 7.3583 5.48E-02 5.59E-01 2.54E-01 1.19E-02 5.41E-03

1.75 44.45 2429.7626 7.6649 7.46E-02 7.61E-01 3.45E-01 1.17E-02 5.30E-03

2.00 50.80 2526.9531 7.9715 9.52E-02 9.72E-01 4.41E-01 1.14E-02 5.18E-03

2.25 57.15 2624.1436 8.278 1.17E-01 1.19E+00 5.40E-01 1.12E-02 5.06E-03

2.50 63.50 2721.3341 8.5846 1.39E-01 1.42E+00 6.43E-01 1.09E-02 4.93E-03

2.75 69.85 2818.5246 8.8912 1.62E-01 1.65E+00 7.50E-01 1.06E-02 4.80E-03

3.00 76.20 2915.7151 9.1978 1.86E-01 1.90E+00 8.60E-01 1.03E-02 4.66E-03

3.25 82.55 3012.9056 9.5044 2.11E-01 2.15E+00 9.75E-01 9.97E-03 4.52E-03

3.50 88.90 3110.0961 9.811 2.36E-01 2.41E+00 1.09E+00 9.65E-03 4.38E-03

3.75 95.25 3207.2866 10.118 2.62E-01 2.68E+00 1.21E+00 9.32E-03 4.23E-03

4.00 101.60 3304.4771 10.424 2.89E-01 2.95E+00 1.34E+00 8.97E-03 4.07E-03

4.25 107.95 3401.6676 10.731 3.17E-01 3.24E+00 1.47E+00 8.62E-03 3.91E-03

4.50 114.30 3498.8581 11.037 3.46E-01 3.53E+00 1.60E+00 8.26E-03 3.75E-03

4.75 120.65 3596.0486 11.344 3.75E-01 3.83E+00 1.74E+00 7.89E-03 3.58E-03

5.00 127.00 3693.2391 11.651 4.06E-01 4.14E+00 1.88E+00 7.50E-03 3.40E-03

5.25 133.35 3790.4296 11.957 4.37E-01 4.46E+00 2.02E+00 7.11E-03 3.22E-03

5.50 139.70 3887.6201 12.264 4.69E-01 4.79E+00 2.17E+00 6.71E-03 3.04E-03

5.75 146.05 3984.8106 12.57 5.02E-01 5.12E+00 2.32E+00 6.29E-03 2.85E-03

6.00 152.40 4082.0011 12.877 5.35E-01 5.46E+00 2.48E+00 5.87E-03 2.66E-03

6.25 158.75 4179.1916 13.184 5.70E-01 5.81E+00 2.64E+00 5.43E-03 2.46E-03

6.50 165.10 4276.3821 13.49 6.05E-01 6.17E+00 2.80E+00 4.99E-03 2.26E-03

6.75 171.45 4373.5726 13.797 6.41E-01 6.54E+00 2.97E+00 4.54E-03 2.06E-03

7.00 177.80 4470.7632 14.103 6.78E-01 6.92E+00 3.14E+00 4.07E-03 1.85E-03

7.25 184.15 4567.9537 14.41 7.15E-01 7.30E+00 3.31E+00 3.60E-03 1.63E-03

7.50 190.50 4665.1442 14.717 7.54E-01 7.69E+00 3.49E+00 3.11E-03 1.41E-03

7.75 196.85 4762.3347 15.023 7.93E-01 8.09E+00 3.67E+00 2.62E-03 1.19E-03

8.00 203.20 4859.5252 15.33 8.33E-01 8.50E+00 3.86E+00 2.11E-03 9.58E-04

8.25 209.55 4956.7157 15.636 8.74E-01 8.92E+00 4.05E+00 1.59E-03 7.23E-04

8.50 215.90 5053.9062 15.943 9.15E-01 9.34E+00 4.24E+00 1.07E-03 4.85E-04

8.75 222.25 5151.0967 16.25 9.58E-01 9.78E+00 4.43E+00 5.33E-04 2.42E-04

9.00 228.60 5248.2872 16.556 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

9.25 234.95 4956.7157 15.636 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

9.50 241.30 4665.1442 14.717 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

9.75 247.65 4373.5726 13.797 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

10.00 254.00 4082.0011 12.877 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

10.25 260.35 3790.4296 11.957 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

10.50 266.70 3498.8581 11.037 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

10.75 273.05 3207.2866 10.118 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

11.00 279.40 2915.7151 9.1978 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

11.25 285.75 2624.1436 8.278 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

11.50 292.10 2332.5721 7.3583 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

11.75 298.45 2041.0006 6.4385 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

12.00 304.80 1749.4291 5.5187 1.00E+00 1.02E+01 4.63E+00 0.00E+00 0.00E+00

Results for RBHT Test 1648

Valid Time Period 5510 to 5660 seconds
A-523

Figure A-435 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1648J for Time Period 5510 to 5660 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-524

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-A 

Test Conditions

Date: 7/1/2003

Steady-state time window: 2985 – 3060 seconds

Inlet flow rate: 3.071 cm/sec (1.209 in./sec) 

Inlet mass flow rate: 0.145 kg/sec (0.320 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-525

Figure A-436 Inlet Flow Plot for Experiment 1651A 

Figure A-437 Inlet Temperature Plot for Experiment 1651A 
A-526

Figure A-438 System Pressure Plot for Experiment 1651A 

Figure A-439 Bundle Power Plot for Experiment 1651A 
A-527

Table A-175: Data Results for RBHT Test 1651 for Time Period 2985 to 3060 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.466 30.526 1461.612 0.481 23.030 0.139 6.655 0.000 0.000 29.9 1431.620 5789.9 277221.9 0.477 0.475 0.479

* 120-133 3048-3378 383 0.541 30.973 1482.996 0.513 24.563 0.248 11.874 -5.738 -274.736 35.95 1721.295 5825.85 278943.1952 0.467 0.465 0.469* 108-120 2743-3048 382 0.423 35.943 1720.962 0.397 19.008 0.310 14.843 0.916 43.860 34.32 1643.250 5860.17 280586.4457 0.449 0.447 0.451

100-108 2540-2743 381 0.429 23.708 1135.124 0.211 10.103 0.227 10.869 0.000 0.000 23.26 1113.695 5883.43 281700.1404 0.44 0.438 0.442

97-100 2464-2540 380 0.320 10.589 507.014 0.066 3.160 0.082 3.926 0.000 0.000 10.44 499.870 5893.87 282200.0103 0.33 0.328 0.332

93-97 2362-2464 379 0.322 14.090 674.609 0.077 3.687 0.107 5.123 0.000 0.000 13.9 665.536 5907.77 282865.5459 0.331 0.329 0.333

* 85-93 2159-2362 378 0.177 34.198 1637.413 0.113 5.410 0.205 9.815 0.940 45.011 32.94 1577.176 5940.71 284442.7216 0.207 0.206 0.208

81-85 2057-2159 377 0.077 19.174 918.045 0.031 1.484 0.098 4.692 0.000 0.000 19.04 911.640 5959.75 285354.3617 0.083 0.079 0.08778-81 1981-2057 376 0.060 14.645 701.215 0.010 0.479 0.047 2.250 0.000 0.000 14.58 698.094 5974.33 286052.4558 0.064 0.061 0.06775-78 1905-1981 375 0.063 14.598 698.978 0.001 0.048 0.000 0.000 0.000 0.000 14.59 698.573 5988.92 286751.0288 0.063 0.060 0.06672-75 1829-1905 374 0.061 14.624 700.221 0.001 0.048 0.000 0.000 0.000 0.000 14.62 700.009 6003.54 287451.0381 0.061 0.058 0.064

* 67-72 1702-1829 373 0.043 24.850 1189.828 0.002 0.096 0.000 0.000 0.228 10.921 24.62 1178.812 6028.16 288629.85 0.051 0.048 0.054

63-67 1600-1702 372 0.042 19.911 953.355 0.002 0.096 0.000 0.000 0.000 0.000 19.9 952.817 6048.06 289582.6672 0.042 0.040 0.04460-63 1524-1600 371 0.019 15.284 731.800 0.001 0.048 0.000 0.000 0.000 0.000 15.28 731.610 6063.34 290314.2775 0.019 0.018 0.02057-60 1448-1524 370 0.055 14.728 705.194 0.001 0.048 0.000 0.000 0.000 0.000 14.72 704.797 6078.06 291019.0749 0.055 0.052 0.05853-57 1346-1448 369 0.042 19.896 952.609 0.002 0.096 0.000 0.000 0.000 0.000 19.89 952.338 6097.95 291971.4132 0.042 0.040 0.044

* 46-53 1168-1346 368 0.042 34.826 1667.500 0.003 0.144 0.000 0.000 -0.187 -8.931 35.01 1676.288 6132.96 293647.701 0.037 0.035 0.039

43-46 1092-1168 367 0.031 15.097 722.849 0.001 0.048 0.000 0.000 0.000 0.000 15.09 722.513 6148.05 294370.214 0.031 0.029 0.03337-43 940-1092 366 0.032 30.173 1444.703 0.003 0.144 0.000 0.000 0.000 0.000 30.16 1444.069 6178.21 295814.2826 0.032 0.030 0.034

* 25-37 635-940 365 0.026 60.700 2906.314 0.006 0.287 0.000 0.000 0.234 11.187 60.46 2894.840 6238.67 298709.1229 0.03 0.029 0.032

13-25 330-635 364 0.027 60.627 2902.833 0.006 0.287 0.000 0.000 0.000 0.000 60.6 2901.544 6299.27 301610.6665 0.027 0.026 0.028

* 0-13 0-330 363 0.020 66.189 3169.146 0.006 0.287 0.000 0.000 -0.387 -18.530 66.57 3187.389 6365.84 304798.0552 0.014 0.013 0.015

Results for RBHT Test 1651

Valid Time Period 2985 to 3060 seconds

Collapsed Liquid Level = 116.760 inches = 2965.71 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-175 Data Results for RBHT Test 1651

A for Time Period 2985 to 3060 seconds
A-528

Table A-176 Energy Balance Results for RBHT Test 1651A for Time Period 2985 to 3060 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2335.7704 7.3684 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

0.25 6.35 2465.5354 7.7777 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

0.50 12.70 2595.3004 8.1871 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

0.75 19.05 2725.0654 8.5964 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

1.00 25.40 2854.8305 9.0058 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

1.25 31.75 2984.5955 9.4151 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

1.50 38.10 3114.3605 9.8245 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

1.75 44.45 3244.1255 10.234 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

2.00 50.80 3373.8905 10.643 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

2.25 57.15 3503.6556 11.053 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

2.50 63.50 3633.4206 11.462 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

2.75 69.85 3763.1856 11.871 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

3.00 76.20 3892.9506 12.281 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

3.25 82.55 4022.7156 12.69 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

3.50 88.90 4152.4807 13.099 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

3.75 95.25 4282.2457 13.509 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

4.00 101.60 4412.0107 13.918 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

4.25 107.95 4541.7757 14.327 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

4.50 114.30 4671.5407 14.737 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

4.75 120.65 4801.3058 15.146 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

5.00 127.00 4931.0708 15.555 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

5.25 133.35 5060.8358 15.965 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

5.50 139.70 5190.6008 16.374 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

5.75 146.05 5320.3659 16.783 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

6.00 152.40 5450.1309 17.193 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

6.25 158.75 5579.8959 17.602 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

6.50 165.10 5709.6609 18.012 0.00E+00 0.00E+00 0.00E+00 1.05E-01 4.74E-02

6.75 171.45 5839.4259 18.421 3.86E-03 2.47E-01 1.12E-01 1.04E-01 4.73E-02

7.00 177.80 5969.191 18.83 9.92E-03 6.34E-01 2.88E-01 1.04E-01 4.70E-02

7.25 184.15 6098.956 19.24 1.61E-02 1.03E+00 4.67E-01 1.03E-01 4.67E-02

7.50 190.50 6228.721 19.649 2.24E-02 1.43E+00 6.51E-01 1.02E-01 4.64E-02

7.75 196.85 6358.486 20.058 2.89E-02 1.85E+00 8.38E-01 1.02E-01 4.61E-02

8.00 203.20 6488.251 20.468 3.55E-02 2.27E+00 1.03E+00 1.01E-01 4.58E-02

8.25 209.55 6618.0161 20.877 4.22E-02 2.70E+00 1.22E+00 1.00E-01 4.54E-02

8.50 215.90 6747.7811 21.286 4.91E-02 3.14E+00 1.42E+00 9.94E-02 4.51E-02

8.75 222.25 6877.5461 21.696 5.60E-02 3.58E+00 1.63E+00 9.87E-02 4.48E-02

9.00 228.60 7007.3111 22.105 6.32E-02 4.04E+00 1.83E+00 9.80E-02 4.44E-02

9.25 234.95 6618.0161 20.877 7.02E-02 4.49E+00 2.04E+00 9.72E-02 4.41E-02

9.50 241.30 6228.721 19.649 7.67E-02 4.91E+00 2.23E+00 9.66E-02 4.38E-02

9.75 247.65 5839.4259 18.421 8.29E-02 5.30E+00 2.41E+00 9.59E-02 4.35E-02

10.00 254.00 5450.1309 17.193 8.87E-02 5.68E+00 2.57E+00 9.53E-02 4.32E-02

10.25 260.35 5060.8358 15.965 9.41E-02 6.02E+00 2.73E+00 9.47E-02 4.30E-02

10.50 266.70 4671.5407 14.737 9.91E-02 6.34E+00 2.88E+00 9.42E-02 4.27E-02

10.75 273.05 4282.2457 13.509 1.04E-01 6.63E+00 3.01E+00 9.37E-02 4.25E-02

11.00 279.40 3892.9506 12.281 1.08E-01 6.90E+00 3.13E+00 9.33E-02 4.23E-02

11.25 285.75 3503.6556 11.053 1.12E-01 7.14E+00 3.24E+00 9.29E-02 4.21E-02

11.50 292.10 3114.3605 9.8245 1.15E-01 7.36E+00 3.34E+00 9.25E-02 4.20E-02

11.75 298.45 2725.0654 8.5964 1.18E-01 7.55E+00 3.43E+00 9.22E-02 4.18E-02

12.00 304.80 2335.7704 7.3684 1.21E-01 7.72E+00 3.50E+00 9.20E-02 4.17E-02

Results for RBHT Test 1651

Valid Time Period 2985 to 3060 seconds
A-529

Figure A-440 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651A for Time Period 2985 to 3060 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-530

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-B 

Test Conditions

Date: 7/1/2003

Steady-state time window: 3270 – 3322 seconds

Inlet flow rate: 3.048 cm/sec (1.200 in./sec) 

Inlet mass flow rate: 0.144 kg/sec (0.317 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-531

Figure A-441 Inlet Flow Plot for Experiment 1651B 

Figure A-442 Inlet Temperature Plot for Experiment 1651B 
A-532

Figure A-443 System Pressure Plot for Experiment 1651B 

Figure A-444 Bundle Power Plot for Experiment 1651B 
A-533

Table A-177: Data Results for RBHT Test 1651 for Time Period 3270 to 3322 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.465 30.537 1462.109 0.478 22.887 0.138 6.607 0.000 0.000 29.91 1432.098 5789.91 277222.3788 0.476 0.474 0.478

* 120-133 3048-3378 383 0.540 31.067 1487.472 0.511 24.467 0.246 11.779 -5.690 -272.463 36 1723.689 5825.91 278946.0681 0.467 0.465 0.469

* 108-120 2743-3048 382 0.422 36.011 1724.194 0.396 18.961 0.307 14.699 0.868 41.539 34.44 1648.996 5860.35 280595.0641 0.447 0.445 0.449

100-108 2540-2743 381 0.427 23.806 1139.848 0.211 10.103 0.225 10.773 0.000 0.000 23.36 1118.483 5883.71 281713.5469 0.438 0.436 0.440

97-100 2464-2540 380 0.320 10.600 507.511 0.066 3.160 0.081 3.878 0.000 0.000 10.45 500.349 5894.16 282213.8956 0.329 0.327 0.331

93-97 2362-2464 379 0.316 14.209 680.328 0.078 3.735 0.106 5.075 0.000 0.000 14.02 671.281 5908.18 282885.1768 0.325 0.323 0.327

* 85-93 2159-2362 378 0.171 34.458 1649.846 0.114 5.458 0.204 9.768 1.050 50.262 33.09 1584.358 5941.27 284469.5345 0.203 0.202 0.204

81-85 2057-2159 377 0.076 19.205 919.537 0.032 1.532 0.097 4.644 0.000 0.000 19.07 913.077 5960.34 285382.611 0.082 0.078 0.08678-81 1981-2057 376 0.060 14.650 701.464 0.011 0.527 0.056 2.681 0.000 0.000 14.58 698.094 5974.92 286080.7052 0.064 0.061 0.06775-78 1905-1981 375 0.063 14.598 698.978 0.001 0.048 0.000 0.000 0.000 0.000 14.59 698.573 5989.51 286779.2781 0.063 0.060 0.06672-75 1829-1905 374 0.061 14.635 700.718 0.001 0.048 0.000 0.000 0.000 0.000 14.63 700.488 6004.14 287479.7663 0.061 0.058 0.064

* 67-72 1702-1829 373 0.043 24.860 1190.326 0.002 0.096 0.000 0.000 0.228 10.939 24.63 1179.291 6028.77 288659.057 0.051 0.048 0.054

63-67 1600-1702 372 0.041 19.922 953.852 0.002 0.096 0.000 0.000 0.000 0.000 19.91 953.296 6048.68 289612.3529 0.041 0.039 0.04360-63 1524-1600 371 0.018 15.300 732.546 0.001 0.048 0.000 0.000 0.000 0.000 15.29 732.089 6063.97 290344.442 0.018 0.017 0.01957-60 1448-1524 370 0.054 14.733 705.443 0.001 0.048 0.000 0.000 0.000 0.000 14.73 705.276 6078.7 291049.7182 0.054 0.051 0.05753-57 1346-1448 369 0.042 19.896 952.609 0.002 0.096 0.000 0.000 0.000 0.000 19.89 952.338 6098.59 292002.0565 0.042 0.040 0.044

* 46-53 1168-1346 368 0.042 34.832 1667.749 0.003 0.144 0.000 0.000 -0.181 -8.682 35.01 1676.288 6133.6 293678.3443 0.037 0.035 0.039

43-46 1092-1168 367 0.031 15.102 723.097 0.001 0.048 0.000 0.000 0.000 0.000 15.09 722.513 6148.69 294400.8574 0.031 0.029 0.03337-43 940-1092 366 0.031 30.184 1445.200 0.003 0.144 0.000 0.000 0.000 0.000 30.17 1444.547 6178.86 295845.4048 0.031 0.029 0.033

* 25-37 635-940 365 0.026 60.694 2906.066 0.006 0.287 0.000 0.000 0.218 10.459 60.47 2895.319 6239.33 298740.7239 0.029 0.028 0.030

13-25 330-635 364 0.027 60.627 2902.833 0.006 0.287 0.000 0.000 0.000 0.000 60.6 2901.544 6299.93 301642.2675 0.027 0.026 0.028

* 0-13 0-330 363 0.020 66.189 3169.146 0.006 0.287 0.000 0.000 -0.387 -18.530 66.57 3187.389 6366.5 304829.6562 0.014 0.013 0.015

Results for RBHT Test 1651

Valid Time Period 3270 to 3322 seconds

Collapsed Liquid Level = 116.823 inches = 2967.31 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-177 Data Results for RBHT Test 1651

B for Time Period 3270 to 3322 seconds
A-534

Table A-178 Energy Balance Results for RBHT Test 1651B for Time Period 3270 to 3322 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2334.8251 7.3654 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

0.25 6.35 2464.5376 7.7746 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

0.50 12.70 2594.2501 8.1837 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

0.75 19.05 2723.9626 8.5929 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

1.00 25.40 2853.6751 9.0021 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

1.25 31.75 2983.3876 9.4113 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

1.50 38.10 3113.1001 9.8205 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

1.75 44.45 3242.8126 10.23 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

2.00 50.80 3372.5251 10.639 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

2.25 57.15 3502.2376 11.048 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

2.50 63.50 3631.9501 11.457 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

2.75 69.85 3761.6626 11.866 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

3.00 76.20 3891.3751 12.276 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

3.25 82.55 4021.0876 12.685 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

3.50 88.90 4150.8001 13.094 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

3.75 95.25 4280.5126 13.503 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

4.00 101.60 4410.2251 13.912 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

4.25 107.95 4539.9376 14.322 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

4.50 114.30 4669.6501 14.731 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

4.75 120.65 4799.3626 15.14 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

5.00 127.00 4929.0751 15.549 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

5.25 133.35 5058.7877 15.958 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

5.50 139.70 5188.5002 16.367 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

5.75 146.05 5318.2127 16.777 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

6.00 152.40 5447.9252 17.186 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

6.25 158.75 5577.6377 17.595 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

6.50 165.10 5707.3502 18.004 0.00E+00 0.00E+00 0.00E+00 1.04E-01 4.71E-02

6.75 171.45 5837.0627 18.413 4.67E-03 2.96E-01 1.34E-01 1.03E-01 4.69E-02

7.00 177.80 5966.7752 18.823 1.08E-02 6.84E-01 3.10E-01 1.03E-01 4.66E-02

7.25 184.15 6096.4877 19.232 1.70E-02 1.08E+00 4.90E-01 1.02E-01 4.63E-02

7.50 190.50 6226.2002 19.641 2.34E-02 1.48E+00 6.73E-01 1.01E-01 4.60E-02

7.75 196.85 6355.9127 20.05 2.99E-02 1.90E+00 8.60E-01 1.01E-01 4.57E-02

8.00 203.20 6485.6252 20.459 3.65E-02 2.32E+00 1.05E+00 1.00E-01 4.54E-02

8.25 209.55 6615.3377 20.869 4.33E-02 2.75E+00 1.25E+00 9.93E-02 4.50E-02

8.50 215.90 6745.0502 21.278 5.02E-02 3.19E+00 1.44E+00 9.86E-02 4.47E-02

8.75 222.25 6874.7627 21.687 5.72E-02 3.63E+00 1.65E+00 9.79E-02 4.44E-02

9.00 228.60 7004.4752 22.096 6.44E-02 4.09E+00 1.85E+00 9.71E-02 4.40E-02

9.25 234.95 6615.3377 20.869 7.14E-02 4.53E+00 2.06E+00 9.64E-02 4.37E-02

9.50 241.30 6226.2002 19.641 7.81E-02 4.96E+00 2.25E+00 9.57E-02 4.34E-02

9.75 247.65 5837.0627 18.413 8.43E-02 5.35E+00 2.43E+00 9.50E-02 4.31E-02

10.00 254.00 5447.9252 17.186 9.01E-02 5.72E+00 2.59E+00 9.44E-02 4.28E-02

10.25 260.35 5058.7877 15.958 9.56E-02 6.07E+00 2.75E+00 9.39E-02 4.26E-02

10.50 266.70 4669.6501 14.731 1.01E-01 6.38E+00 2.90E+00 9.34E-02 4.23E-02

10.75 273.05 4280.5126 13.503 1.05E-01 6.68E+00 3.03E+00 9.29E-02 4.21E-02

11.00 279.40 3891.3751 12.276 1.10E-01 6.95E+00 3.15E+00 9.24E-02 4.19E-02

11.25 285.75 3502.2376 11.048 1.13E-01 7.19E+00 3.26E+00 9.20E-02 4.17E-02

11.50 292.10 3113.1001 9.8205 1.17E-01 7.41E+00 3.36E+00 9.17E-02 4.16E-02

11.75 298.45 2723.9626 8.5929 1.20E-01 7.60E+00 3.45E+00 9.14E-02 4.14E-02

12.00 304.80 2334.8251 7.3654 1.22E-01 7.76E+00 3.52E+00 9.11E-02 4.13E-02

Results for RBHT Test 1651

Valid Time Period 3270 to 3322 seconds
A-535

Figure A-445 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651B for Time Period 3270 to 3322 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-536

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-C 

Test Conditions

Date: 7/1/2003

Steady-state time window: 3520 – 3610 seconds

Inlet flow rate: 3.028 cm/sec (1.192 in./sec) 

Inlet mass flow rate: 0.143 kg/sec (0.315 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-537

Figure A-446 Inlet Flow Plot for Experiment 1651C 

Figure A-447 Inlet Temperature Plot for Experiment 1651C 
A-538

Figure A-448 System Pressure Plot for Experiment 1651C 

Figure A-449 Bundle Power Plot for Experiment 1651C 
A-539

Table A-179: Data Results for RBHT Test 1651 for Time Period 3520 to 3610 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.467 30.464 1458.628 0.477 22.839 0.137 6.560 0.000 0.000 29.84 1428.747 5789.84 277219.0272 0.478 0.476 0.480

* 120-133 3048-3378 383 0.539 31.124 1490.207 0.510 24.419 0.244 11.683 -5.550 -265.753 35.92 1719.859 5825.76 278938.886 0.468 0.466 0.470* 108-120 2743-3048 382 0.425 35.860 1716.983 0.395 18.913 0.305 14.603 0.790 37.823 34.37 1645.644 5860.13 280584.5305 0.448 0.446 0.450

100-108 2540-2743 381 0.428 23.765 1137.859 0.211 10.103 0.223 10.677 0.000 0.000 23.32 1116.568 5883.45 281701.098 0.439 0.437 0.441

97-100 2464-2540 380 0.325 10.511 503.284 0.067 3.208 0.081 3.878 0.000 0.000 10.36 496.039 5893.81 282197.1375 0.335 0.333 0.337

93-97 2362-2464 379 0.324 14.043 672.371 0.078 3.735 0.105 5.027 0.000 0.000 13.85 663.142 5907.66 282860.2791 0.333 0.331 0.335

* 85-93 2159-2362 378 0.183 33.949 1625.477 0.116 5.554 0.202 9.672 0.741 35.470 32.89 1574.782 5940.55 284435.0607 0.208 0.207 0.209

81-85 2057-2159 377 0.077 19.174 918.045 0.034 1.628 0.097 4.644 0.000 0.000 19.04 911.640 5959.59 285346.7008 0.083 0.079 0.08778-81 1981-2057 376 0.060 14.640 700.967 0.012 0.575 0.066 3.160 0.000 0.000 14.56 697.137 5974.15 286043.8374 0.065 0.062 0.06875-78 1905-1981 375 0.063 14.593 698.729 0.001 0.048 0.000 0.000 0.000 0.000 14.59 698.573 5988.74 286742.4103 0.063 0.060 0.06672-75 1829-1905 374 0.061 14.624 700.221 0.001 0.048 0.000 0.000 0.000 0.000 14.62 700.009 6003.36 287442.4197 0.061 0.058 0.064

* 67-72 1702-1829 373 0.043 24.845 1189.580 0.002 0.096 0.000 0.000 0.213 10.193 24.63 1179.291 6027.99 288621.7104 0.051 0.048 0.054

63-67 1600-1702 372 0.041 19.916 953.603 0.002 0.096 0.000 0.000 0.000 0.000 19.91 953.296 6047.9 289575.0063 0.041 0.039 0.04360-63 1524-1600 371 0.018 15.294 732.298 0.001 0.048 0.000 0.000 0.000 0.000 15.29 732.089 6063.19 290307.0954 0.019 0.018 0.02057-60 1448-1524 370 0.054 14.733 705.443 0.001 0.048 0.000 0.000 0.000 0.000 14.73 705.276 6077.92 291012.3716 0.054 0.051 0.05753-57 1346-1448 369 0.043 19.890 952.360 0.002 0.096 0.000 0.000 0.000 0.000 19.88 951.860 6097.8 291964.2311 0.043 0.041 0.045

* 46-53 1168-1346 368 0.042 34.821 1667.252 0.003 0.144 0.000 0.000 -0.182 -8.701 35 1675.809 6132.8 293640.0401 0.037 0.035 0.039

43-46 1092-1168 367 0.031 15.097 722.849 0.001 0.048 0.000 0.000 0.000 0.000 15.09 722.513 6147.89 294362.5532 0.031 0.029 0.03337-43 940-1092 366 0.032 30.163 1444.206 0.003 0.144 0.000 0.000 0.000 0.000 30.15 1443.590 6178.04 295806.143 0.032 0.030 0.034

* 25-37 635-940 365 0.026 60.689 2905.817 0.006 0.287 0.000 0.000 0.233 11.168 60.45 2894.362 6238.49 298700.5045 0.03 0.029 0.032

13-25 330-635 364 0.027 60.627 2902.833 0.006 0.287 0.000 0.000 0.000 0.000 60.6 2901.544 6299.09 301602.0481 0.027 0.026 0.028

* 0-13 0-330 363 0.020 66.189 3169.146 0.006 0.287 0.000 0.000 -0.387 -18.530 66.57 3187.389 6365.66 304789.4368 0.014 0.013 0.015

Results for RBHT Test 1651

Valid Time Period 3520 to 3610 seconds

Collapsed Liquid Level = 116.333 inches = 2954.87 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-179 Data Results for RBHT Test 1651

C for Time Period 3520 to 3610 seconds
A-540

Table A-180 Energy Balance Results for RBHT Test 1651C for Time Period 3520 to 3610 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2331.6988 7.3555 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

0.25 6.35 2461.2376 7.7641 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

0.50 12.70 2590.7765 8.1728 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

0.75 19.05 2720.3153 8.5814 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

1.00 25.40 2849.8541 8.9901 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

1.25 31.75 2979.3929 9.3987 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

1.50 38.10 3108.9318 9.8073 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

1.75 44.45 3238.4706 10.216 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

2.00 50.80 3368.0094 10.625 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

2.25 57.15 3497.5482 11.033 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

2.50 63.50 3627.087 11.442 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

2.75 69.85 3756.6259 11.851 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

3.00 76.20 3886.1647 12.259 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

3.25 82.55 4015.7035 12.668 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

3.50 88.90 4145.2423 13.076 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

3.75 95.25 4274.7812 13.485 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

4.00 101.60 4404.32 13.894 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

4.25 107.95 4533.8588 14.302 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

4.50 114.30 4663.3976 14.711 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

4.75 120.65 4792.9365 15.12 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

5.00 127.00 4922.4753 15.528 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

5.25 133.35 5052.0141 15.937 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

5.50 139.70 5181.5529 16.346 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

5.75 146.05 5311.0918 16.754 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

6.00 152.40 5440.6306 17.163 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

6.25 158.75 5570.1694 17.571 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

6.50 165.10 5699.7082 17.98 0.00E+00 0.00E+00 0.00E+00 1.03E-01 4.67E-02

6.75 171.45 5829.247 18.389 5.60E-03 3.53E-01 1.60E-01 1.02E-01 4.65E-02

7.00 177.80 5958.7859 18.797 1.17E-02 7.40E-01 3.36E-01 1.02E-01 4.62E-02

7.25 184.15 6088.3247 19.206 1.80E-02 1.14E+00 5.15E-01 1.01E-01 4.59E-02

7.50 190.50 6217.8635 19.615 2.44E-02 1.54E+00 6.98E-01 1.01E-01 4.56E-02

7.75 196.85 6347.4023 20.023 3.10E-02 1.95E+00 8.85E-01 9.98E-02 4.53E-02

8.00 203.20 6476.9412 20.432 3.76E-02 2.37E+00 1.08E+00 9.92E-02 4.50E-02

8.25 209.55 6606.48 20.841 4.44E-02 2.80E+00 1.27E+00 9.85E-02 4.47E-02

8.50 215.90 6736.0188 21.249 5.14E-02 3.24E+00 1.47E+00 9.77E-02 4.43E-02

8.75 222.25 6865.5576 21.658 5.85E-02 3.69E+00 1.67E+00 9.70E-02 4.40E-02

9.00 228.60 6995.0965 22.067 6.57E-02 4.14E+00 1.88E+00 9.63E-02 4.37E-02

9.25 234.95 6606.48 20.841 7.28E-02 4.59E+00 2.08E+00 9.55E-02 4.33E-02

9.50 241.30 6217.8635 19.615 7.94E-02 5.01E+00 2.27E+00 9.49E-02 4.30E-02

9.75 247.65 5829.247 18.389 8.57E-02 5.40E+00 2.45E+00 9.42E-02 4.27E-02

10.00 254.00 5440.6306 17.163 9.16E-02 5.77E+00 2.62E+00 9.36E-02 4.25E-02

10.25 260.35 5052.0141 15.937 9.70E-02 6.12E+00 2.78E+00 9.30E-02 4.22E-02

10.50 266.70 4663.3976 14.711 1.02E-01 6.44E+00 2.92E+00 9.25E-02 4.20E-02

10.75 273.05 4274.7812 13.485 1.07E-01 6.73E+00 3.05E+00 9.20E-02 4.17E-02

11.00 279.40 3886.1647 12.259 1.11E-01 7.00E+00 3.17E+00 9.16E-02 4.15E-02

11.25 285.75 3497.5482 11.033 1.15E-01 7.24E+00 3.28E+00 9.12E-02 4.14E-02

11.50 292.10 3108.9318 9.8073 1.18E-01 7.46E+00 3.38E+00 9.08E-02 4.12E-02

11.75 298.45 2720.3153 8.5814 1.21E-01 7.65E+00 3.47E+00 9.05E-02 4.11E-02

12.00 304.80 2331.6988 7.3555 1.24E-01 7.81E+00 3.54E+00 9.03E-02 4.09E-02

Results for RBHT Test 1651

Valid Time Period 3520 to 3610 seconds
A-541

Figure A-450 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651C for Time Period 3520 to 3610 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-542

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-D 

Test Conditions

Date: 7/1/2003

Steady-state time window: 4050 – 4125 seconds

Inlet flow rate: 2.530 cm/sec (0.996 in./sec) 

Inlet mass flow rate: 0.119 kg/sec (0.263 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-543

Figure A-451 Inlet Flow Plot for Experiment 1651D 

Figure A-452 Inlet Temperature Plot for Experiment 1651D 
A-544

Figure A-453 System Pressure Plot for Experiment 1651D 

Figure A-454 Bundle Power Plot for Experiment 1651D 
A-545

Table A-181: Data Results for RBHT Test 1651 for Time Period 4050 to 4125 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.510 28.008 1341.012 0.428 20.493 0.115 5.506 0.000 0.000 27.46 1314.792 5787.46 277105.0722 0.519 0.516 0.522

* 120-133 3048-3378 383 0.583 28.174 1348.970 0.463 22.169 0.205 9.815 -5.094 -243.911 32.6 1560.896 5820.06 278665.9686 0.517 0.514 0.520

* 108-120 2743-3048 382 0.463 33.440 1601.109 0.369 17.668 0.255 12.209 2.446 117.108 30.37 1454.123 5850.43 280120.092 0.513 0.510 0.516

100-108 2540-2743 381 0.501 20.737 992.891 0.206 9.863 0.187 8.954 0.000 0.000 20.34 973.884 5870.77 281093.9764 0.51 0.507 0.513

97-100 2464-2540 380 0.377 9.712 464.990 0.068 3.256 0.068 3.256 0.000 0.000 9.574 458.406 5880.344 281552.382 0.385 0.383 0.387

93-97 2362-2464 379 0.390 12.672 606.725 0.083 3.974 0.088 4.213 0.000 0.000 12.5 598.503 5892.844 282150.8852 0.398 0.396 0.400

* 85-93 2159-2362 378 0.293 29.389 1407.155 0.138 6.607 0.169 8.092 3.142 150.442 25.94 1242.014 5918.784 283392.899 0.376 0.374 0.378

81-85 2057-2159 377 0.346 13.581 650.241 0.054 2.586 0.081 3.878 0.000 0.000 13.44 643.511 5932.224 284036.4097 0.353 0.351 0.355

78-81 1981-2057 376 0.222 12.126 580.616 0.034 1.628 0.059 2.825 0.000 0.000 12.03 575.999 5944.254 284612.4092 0.228 0.227 0.229

75-78 1905-1981 375 0.133 13.508 646.759 0.027 1.293 0.058 2.777 0.000 0.000 13.42 642.553 5957.674 285254.9622 0.138 0.137 0.139

72-75 1829-1905 374 0.071 14.469 692.761 0.020 0.958 0.057 2.729 0.000 0.000 14.39 688.997 5972.064 285943.9591 0.076 0.072 0.080

* 67-72 1702-1829 373 0.051 24.653 1180.379 0.017 0.814 0.062 2.969 0.214 10.234 24.36 1166.363 5996.424 287110.3222 0.062 0.059 0.065

63-67 1600-1702 372 0.047 19.797 947.884 0.001 0.048 0.000 0.000 0.000 0.000 19.79 947.550 6016.214 288057.8725 0.047 0.045 0.04960-63 1524-1600 371 0.024 15.201 727.822 0.001 0.048 0.000 0.000 0.000 0.000 15.19 727.301 6031.404 288785.1736 0.025 0.024 0.026

57-60 1448-1524 370 0.059 14.661 701.961 0.001 0.048 0.000 0.000 0.000 0.000 14.65 701.446 6046.054 289486.6194 0.059 0.056 0.062

53-57 1346-1448 369 0.047 19.802 948.133 0.001 0.048 0.000 0.000 0.000 0.000 19.79 947.550 6065.844 290434.1696 0.047 0.045 0.049

* 46-53 1168-1346 368 0.046 34.681 1660.538 0.002 0.096 0.000 0.000 -0.171 -8.185 34.85 1668.627 6100.694 292102.7966 0.041 0.039 0.043

43-46 1092-1168 367 0.035 15.035 719.865 0.001 0.048 0.000 0.000 0.000 0.000 15.03 719.640 6115.724 292822.4369 0.035 0.033 0.037

37-43 940-1092 366 0.036 30.049 1438.735 0.002 0.096 0.000 0.000 0.000 0.000 30.04 1438.323 6145.764 294260.7598 0.036 0.034 0.038

* 25-37 635-940 365 0.028 60.559 2899.601 0.004 0.192 0.000 0.000 0.245 11.751 60.31 2887.658 6206.074 297148.4181 0.032 0.030 0.034

13-25 330-635 364 0.028 60.559 2899.601 0.004 0.192 0.000 0.000 0.000 0.000 60.54 2898.671 6266.614 300047.0888 0.028 0.027 0.029

* 0-13 0-330 363 0.020 66.163 3167.903 0.004 0.192 0.000 0.000 -0.381 -18.241 66.54 3185.952 6333.154 303233.0411 0.014 0.013 0.015

Results for RBHT Test 1651

Valid Time Period 4050 to 4125 seconds

Collapsed Liquid Level = 111.074 inches = 2821.27 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-181 Data Results for RBHT Test 1651

D for Time Period 4050 to 4125 seconds
A-546

Table A-182 Energy Balance Results for RBHT Test 1651D for Time Period 4050 to 4125 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2334.8096 7.3653 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

0.25 6.35 2464.5213 7.7745 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

0.50 12.70 2594.2329 8.1837 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

0.75 19.05 2723.9446 8.5929 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

1.00 25.40 2853.6562 9.0021 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

1.25 31.75 2983.3678 9.4112 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

1.50 38.10 3113.0795 9.8204 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

1.75 44.45 3242.7911 10.23 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

2.00 50.80 3372.5028 10.639 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

2.25 57.15 3502.2144 11.048 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

2.50 63.50 3631.9261 11.457 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

2.75 69.85 3761.6377 11.866 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

3.00 76.20 3891.3494 12.276 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

3.25 82.55 4021.061 12.685 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

3.50 88.90 4150.7726 13.094 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

3.75 95.25 4280.4843 13.503 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

4.00 101.60 4410.1959 13.912 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

4.25 107.95 4539.9076 14.321 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

4.50 114.30 4669.6192 14.731 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

4.75 120.65 4799.3309 15.14 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

5.00 127.00 4929.0425 15.549 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

5.25 133.35 5058.7542 15.958 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

5.50 139.70 5188.4658 16.367 0.00E+00 0.00E+00 0.00E+00 8.61E-02 3.91E-02

5.75 146.05 5318.1775 16.777 8.27E-04 4.36E-02 1.98E-02 8.61E-02 3.90E-02

6.00 152.40 5447.8891 17.186 7.53E-03 3.97E-01 1.80E-01 8.55E-02 3.88E-02

6.25 158.75 5577.6007 17.595 1.44E-02 7.59E-01 3.44E-01 8.49E-02 3.85E-02

6.50 165.10 5707.3124 18.004 2.14E-02 1.13E+00 5.12E-01 8.43E-02 3.82E-02

6.75 171.45 5837.024 18.413 2.86E-02 1.51E+00 6.84E-01 8.37E-02 3.80E-02

7.00 177.80 5966.7357 18.822 3.60E-02 1.90E+00 8.60E-01 8.31E-02 3.77E-02

7.25 184.15 6096.4473 19.232 4.35E-02 2.29E+00 1.04E+00 8.24E-02 3.74E-02

7.50 190.50 6226.159 19.641 5.11E-02 2.70E+00 1.22E+00 8.17E-02 3.71E-02

7.75 196.85 6355.8706 20.05 5.90E-02 3.11E+00 1.41E+00 8.11E-02 3.68E-02

8.00 203.20 6485.5823 20.459 6.70E-02 3.53E+00 1.60E+00 8.04E-02 3.65E-02

8.25 209.55 6615.2939 20.868 7.51E-02 3.96E+00 1.80E+00 7.97E-02 3.61E-02

8.50 215.90 6745.0056 21.278 8.35E-02 4.40E+00 2.00E+00 7.90E-02 3.58E-02

8.75 222.25 6874.7172 21.687 9.19E-02 4.85E+00 2.20E+00 7.82E-02 3.55E-02

9.00 228.60 7004.4288 22.096 1.01E-01 5.30E+00 2.41E+00 7.75E-02 3.51E-02

9.25 234.95 6615.2939 20.868 1.09E-01 5.74E+00 2.61E+00 7.68E-02 3.48E-02

9.50 241.30 6226.159 19.641 1.17E-01 6.17E+00 2.80E+00 7.61E-02 3.45E-02

9.75 247.65 5837.024 18.413 1.25E-01 6.57E+00 2.98E+00 7.54E-02 3.42E-02

10.00 254.00 5447.8891 17.186 1.32E-01 6.94E+00 3.15E+00 7.48E-02 3.39E-02

10.25 260.35 5058.7542 15.958 1.38E-01 7.28E+00 3.30E+00 7.43E-02 3.37E-02

10.50 266.70 4669.6192 14.731 1.44E-01 7.60E+00 3.45E+00 7.37E-02 3.34E-02

10.75 273.05 4280.4843 13.503 1.50E-01 7.90E+00 3.58E+00 7.32E-02 3.32E-02

11.00 279.40 3891.3494 12.276 1.55E-01 8.16E+00 3.70E+00 7.28E-02 3.30E-02

11.25 285.75 3502.2144 11.048 1.59E-01 8.40E+00 3.81E+00 7.24E-02 3.28E-02

11.50 292.10 3113.0795 9.8204 1.64E-01 8.62E+00 3.91E+00 7.21E-02 3.27E-02

11.75 298.45 2723.9446 8.5929 1.67E-01 8.81E+00 4.00E+00 7.17E-02 3.25E-02

12.00 304.80 2334.8096 7.3653 1.70E-01 8.98E+00 4.07E+00 7.15E-02 3.24E-02

Results for RBHT Test 1651

Valid Time Period 4050 to 4125 seconds
A-547

Figure A-455 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651D for Time Period 4050 to 4125 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-548

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-E 

Test Conditions

Date: 7/1/2003

Steady-state time window: 4770 – 4845 seconds

Inlet flow rate: 2.517 cm/sec (0.991 in./sec) 

Inlet mass flow rate: 0.119 kg/sec (0.262 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-549

Figure A-456 Inlet Flow Plot for Experiment 1651E 

Figure A-457 Inlet Temperature Plot for Experiment 1651E 
A-550

Figure A-458 System Pressure Plot for Experiment 1651E 

Figure A-459 Bundle Power Plot for Experiment 1651E 
A-551

Table A-183: Data Results for RBHT Test 1651 for Time Period 4770 to 4845 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.511 27.961 1338.775 0.427 20.445 0.114 5.458 0.000 0.000 27.41 1312.398 5787.41 277102.6782 0.52 0.517 0.523

* 120-133 3048-3378 383 0.584 28.111 1345.986 0.462 22.121 0.203 9.720 -5.034 -241.005 32.48 1555.151 5819.89 278657.8289 0.519 0.516 0.522

* 108-120 2743-3048 382 0.468 33.159 1587.681 0.368 17.620 0.254 12.162 2.397 114.789 30.14 1443.111 5850.03 280100.9399 0.516 0.513 0.519

100-108 2540-2743 381 0.506 20.540 983.442 0.206 9.863 0.186 8.906 0.000 0.000 20.14 964.308 5870.17 281065.2482 0.515 0.512 0.518

97-100 2464-2540 380 0.381 9.639 461.509 0.068 3.256 0.067 3.208 0.000 0.000 9.502 454.958 5879.672 281520.2064 0.39 0.388 0.392

93-97 2362-2464 379 0.397 12.537 600.260 0.083 3.974 0.088 4.213 0.000 0.000 12.36 591.800 5892.032 282112.0064 0.405 0.403 0.407

* 85-93 2159-2362 378 0.298 29.171 1396.712 0.139 6.655 0.168 8.044 3.274 156.757 25.59 1225.256 5917.622 283337.2622 0.384 0.382 0.386

81-85 2057-2159 377 0.357 13.368 640.046 0.055 2.633 0.080 3.830 0.000 0.000 13.23 633.456 5930.852 283970.718 0.363 0.361 0.365

78-81 1981-2057 376 0.242 11.804 565.200 0.034 1.628 0.059 2.825 0.000 0.000 11.71 560.678 5942.562 284531.3958 0.248 0.247 0.249

75-78 1905-1981 375 0.158 13.113 627.861 0.028 1.341 0.057 2.729 0.000 0.000 13.03 623.880 5955.592 285155.2755 0.164 0.163 0.165

72-75 1829-1905 374 0.082 14.308 685.053 0.021 1.005 0.056 2.681 0.000 0.000 14.23 681.336 5969.822 285836.6116 0.087 0.083 0.091

* 67-72 1702-1829 373 0.052 24.622 1178.887 0.018 0.862 0.068 3.256 0.316 15.110 24.22 1159.660 5994.042 286996.2714 0.067 0.064 0.070

63-67 1600-1702 372 0.048 19.787 947.387 0.001 0.048 0.000 0.000 0.000 0.000 19.78 947.071 6013.822 287943.3429 0.048 0.046 0.05060-63 1524-1600 371 0.026 15.180 726.827 0.001 0.048 0.000 0.000 0.000 0.000 15.18 726.822 6029.002 288670.1652 0.026 0.025 0.027

57-60 1448-1524 370 0.059 14.656 701.713 0.001 0.048 0.000 0.000 0.000 0.000 14.65 701.446 6043.652 289371.611 0.059 0.056 0.062

53-57 1346-1448 369 0.047 19.797 947.884 0.001 0.048 0.000 0.000 0.000 0.000 19.79 947.550 6063.442 290319.1613 0.047 0.045 0.049

* 46-53 1168-1346 368 0.046 34.671 1660.041 0.002 0.096 0.000 0.000 -0.171 -8.203 34.84 1668.148 6098.282 291987.3094 0.041 0.039 0.043

43-46 1092-1168 367 0.035 15.029 719.616 0.001 0.048 0.000 0.000 0.000 0.000 15.02 719.161 6113.302 292706.4709 0.035 0.033 0.037

37-43 940-1092 366 0.036 30.054 1438.984 0.002 0.096 0.000 0.000 0.000 0.000 30.04 1438.323 6143.342 294144.7938 0.036 0.034 0.038

* 25-37 635-940 365 0.028 60.559 2899.601 0.004 0.192 0.000 0.000 0.245 11.751 60.31 2887.658 6203.652 297032.4521 0.032 0.030 0.034

13-25 330-635 364 0.028 60.559 2899.601 0.004 0.192 0.000 0.000 0.000 0.000 60.54 2898.671 6264.192 299931.1229 0.028 0.027 0.029

* 0-13 0-330 363 0.020 66.168 3168.151 0.004 0.192 0.000 0.000 -0.376 -17.993 66.54 3185.952 6330.732 303117.0752 0.014 0.013 0.015

Results for RBHT Test 1651

Valid Time Period 4770 to 4845 seconds

Collapsed Liquid Level = 110.781 inches = 2813.83 mm

 (Zosv) Onset of Significant Void = 58.5 inches = 1486 mm

Table A-183 Data Results for RBHT Test 1651

E for Time Period 4770 to 4845 seconds
A-552

Table A-184 Energy Balance Results for RBHT Test 1651E for Time Period 4770 to 4845 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2335.0711 7.3661 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.25 6.35 2464.7972 7.7754 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.50 12.70 2594.5234 8.1846 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

0.75 19.05 2724.2496 8.5938 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.00 25.40 2853.9758 9.0031 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.25 31.75 2983.7019 9.4123 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.50 38.10 3113.4281 9.8215 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

1.75 44.45 3243.1543 10.231 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.00 50.80 3372.8804 10.64 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.25 57.15 3502.6066 11.049 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.50 63.50 3632.3328 11.458 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

2.75 69.85 3762.059 11.868 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.00 76.20 3891.7851 12.277 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.25 82.55 4021.5113 12.686 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.50 88.90 4151.2375 13.095 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

3.75 95.25 4280.9636 13.505 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

4.00 101.60 4410.6898 13.914 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

4.25 107.95 4540.416 14.323 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

4.50 114.30 4670.1422 14.732 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

4.75 120.65 4799.8683 15.142 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

5.00 127.00 4929.5945 15.551 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

5.25 133.35 5059.3207 15.96 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

5.50 139.70 5189.0468 16.369 0.00E+00 0.00E+00 0.00E+00 8.57E-02 3.89E-02

5.75 146.05 5318.773 16.778 1.63E-03 8.56E-02 3.88E-02 8.56E-02 3.88E-02

6.00 152.40 5448.4992 17.188 8.37E-03 4.39E-01 1.99E-01 8.50E-02 3.85E-02

6.25 158.75 5578.2254 17.597 1.53E-02 8.01E-01 3.63E-01 8.44E-02 3.83E-02

6.50 165.10 5707.9515 18.006 2.23E-02 1.17E+00 5.31E-01 8.38E-02 3.80E-02

6.75 171.45 5837.6777 18.415 2.96E-02 1.55E+00 7.03E-01 8.32E-02 3.77E-02

7.00 177.80 5967.4039 18.825 3.70E-02 1.94E+00 8.78E-01 8.25E-02 3.74E-02

7.25 184.15 6097.13 19.234 4.45E-02 2.33E+00 1.06E+00 8.19E-02 3.71E-02

7.50 190.50 6226.8562 19.643 5.22E-02 2.74E+00 1.24E+00 8.12E-02 3.68E-02

7.75 196.85 6356.5824 20.052 6.01E-02 3.15E+00 1.43E+00 8.05E-02 3.65E-02

8.00 203.20 6486.3085 20.462 6.81E-02 3.57E+00 1.62E+00 7.99E-02 3.62E-02

8.25 209.55 6616.0347 20.871 7.63E-02 4.00E+00 1.81E+00 7.91E-02 3.59E-02

8.50 215.90 6745.7609 21.28 8.47E-02 4.44E+00 2.01E+00 7.84E-02 3.56E-02

8.75 222.25 6875.4871 21.689 9.32E-02 4.88E+00 2.22E+00 7.77E-02 3.52E-02

9.00 228.60 7005.2132 22.098 1.02E-01 5.34E+00 2.42E+00 7.70E-02 3.49E-02

9.25 234.95 6616.0347 20.871 1.11E-01 5.79E+00 2.63E+00 7.62E-02 3.46E-02

9.50 241.30 6226.8562 19.643 1.19E-01 6.21E+00 2.82E+00 7.55E-02 3.43E-02

9.75 247.65 5837.6777 18.415 1.26E-01 6.60E+00 2.99E+00 7.49E-02 3.40E-02

10.00 254.00 5448.4992 17.188 1.33E-01 6.97E+00 3.16E+00 7.43E-02 3.37E-02

10.25 260.35 5059.3207 15.96 1.40E-01 7.32E+00 3.32E+00 7.37E-02 3.34E-02

10.50 266.70 4670.1422 14.732 1.46E-01 7.64E+00 3.47E+00 7.32E-02 3.32E-02

10.75 273.05 4280.9636 13.505 1.51E-01 7.93E+00 3.60E+00 7.27E-02 3.30E-02

11.00 279.40 3891.7851 12.277 1.57E-01 8.20E+00 3.72E+00 7.23E-02 3.28E-02

11.25 285.75 3502.6066 11.049 1.61E-01 8.44E+00 3.83E+00 7.19E-02 3.26E-02

11.50 292.10 3113.4281 9.8215 1.65E-01 8.66E+00 3.93E+00 7.15E-02 3.24E-02

11.75 298.45 2724.2496 8.5938 1.69E-01 8.85E+00 4.01E+00 7.12E-02 3.23E-02

12.00 304.80 2335.0711 7.3661 1.72E-01 9.02E+00 4.09E+00 7.09E-02 3.22E-02

Results for RBHT Test 1651

Valid Time Period 4770 to 4845 seconds
A-553

Figure A-460 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651E for Time Period 4770 to 4845 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-554

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-F 

Test Conditions

Date: 7/1/2003

Steady-state time window: 5030 – 5100 seconds

Inlet flow rate: 2.042 cm/sec (0.804 in./sec) 

Inlet mass flow rate: 0.097 kg/sec (0.213 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-555

Figure A-461 Inlet Flow Plot for Experiment 1651F 

Figure A-462 Inlet Temperature Plot for Experiment 1651F 
A-556

Figure A-463 System Pressure Plot for Experiment 1651F 

Figure A-464 Bundle Power Plot for Experiment 1651F 
A-557

Table A-185: Data Results for RBHT Test 1651 for Time Period 4959 to 5100 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.556 25.349 1213.700 0.365 17.476 0.092 4.405 0.000 0.000 24.88 1191.261 5784.88 276981.5411 0.564 0.561 0.567

* 120-133 3048-3378 383 0.609 26.403 1264.177 0.398 19.056 0.165 7.900 -3.650 -174.768 29.49 1411.989 5814.37 278393.5299 0.563 0.560 0.566* 108-120 2743-3048 382 0.496 31.414 1504.132 0.322 15.417 0.206 9.863 3.526 168.847 27.36 1310.004 5841.73 279703.5337 0.561 0.558 0.564

100-108 2540-2743 381 0.552 18.628 891.936 0.185 8.858 0.150 7.182 0.000 0.000 18.29 875.730 5860.02 280579.2636 0.56 0.557 0.563

97-100 2464-2540 380 0.415 9.119 436.643 0.063 3.016 0.054 2.586 0.000 0.000 9 430.922 5869.02 281010.1859 0.422 0.420 0.424

93-97 2362-2464 379 0.441 11.617 556.248 0.078 3.735 0.071 3.399 0.000 0.000 11.47 549.187 5880.49 281559.3725 0.448 0.446 0.450

* 85-93 2159-2362 378 0.347 27.146 1299.735 0.136 6.512 0.136 6.512 4.274 204.618 22.6 1082.094 5903.09 282641.4663 0.456 0.454 0.458

81-85 2057-2159 377 0.458 11.264 539.339 0.058 2.777 0.065 3.112 0.000 0.000 11.14 533.386 5914.23 283174.8524 0.464 0.462 0.46678-81 1981-2057 376 0.343 10.236 490.105 0.039 1.867 0.048 2.298 0.000 0.000 10.14 485.506 5924.37 283660.3582 0.349 0.347 0.35175-78 1905-1981 375 0.309 10.771 515.717 0.035 1.676 0.047 2.250 0.000 0.000 10.69 511.840 5935.06 284172.1981 0.314 0.312 0.31672-75 1829-1905 374 0.251 11.669 558.734 0.030 1.436 0.045 2.155 0.000 0.000 11.59 554.932 5946.65 284727.1303 0.256 0.255 0.257

* 67-72 1702-1829 373 0.191 21.017 1006.319 0.041 1.963 0.073 3.495 -0.677 -32.395 21.58 1033.256 5968.23 285760.3862 0.169 0.168 0.170

63-67 1600-1702 372 0.078 19.153 917.051 0.023 1.101 0.057 2.729 0.000 0.000 19.07 913.077 5987.3 286673.4627 0.082 0.078 0.08660-63 1524-1600 371 0.032 15.076 721.854 0.010 0.479 0.041 1.963 0.000 0.000 15.02 719.161 6002.32 287392.6242 0.036 0.034 0.03857-60 1448-1524 370 0.066 14.557 696.988 0.004 0.192 0.018 0.862 0.000 0.000 14.53 695.700 6016.85 288088.3243 0.067 0.064 0.07053-57 1346-1448 369 0.053 19.678 942.165 0.001 0.048 0.000 0.000 0.000 0.000 19.67 941.805 6036.52 289030.129 0.053 0.050 0.056

* 46-53 1168-1346 368 0.051 34.489 1651.338 0.001 0.048 0.000 0.000 -0.162 -7.761 34.65 1659.051 6071.17 290689.1799 0.047 0.045 0.049

43-46 1092-1168 367 0.040 14.957 716.135 0.001 0.048 0.000 0.000 0.000 0.000 14.95 715.810 6086.12 291404.9897 0.04 0.038 0.04237-43 940-1092 366 0.039 29.934 1433.265 0.001 0.048 0.000 0.000 0.000 0.000 29.92 1432.577 6116.04 292837.567 0.039 0.037 0.041

* 25-37 635-940 365 0.031 60.367 2890.400 0.003 0.144 0.000 0.000 0.224 10.738 60.14 2879.519 6176.18 295717.0857 0.035 0.033 0.037

13-25 330-635 364 0.030 60.461 2894.876 0.003 0.144 0.000 0.000 0.000 0.000 60.44 2893.883 6236.62 298610.9684 0.03 0.029 0.032

* 0-13 0-330 363 0.021 66.121 3165.913 0.003 0.144 0.000 0.000 -0.362 -17.310 66.48 3183.079 6303.1 301794.0479 0.015 0.014 0.016

Results for RBHT Test 1651

Valid Time Period 4959 to 5100 seconds

Collapsed Liquid Level = 105.572 inches = 2681.53 mm

 (Zosv) Onset of Significant Void = 55 inches = 1397 mm

Table A-185 Data Results for RBHT Test 1651

F for Time Period 4959 to 5100 seconds
A-558

Table A-186 Energy Balance Results for RBHT Test 1651F for Time Period 4959 to 5100 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2327.6329 7.3427 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

0.25 6.35 2456.9458 7.7506 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

0.50 12.70 2586.2588 8.1585 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

0.75 19.05 2715.5717 8.5665 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

1.00 25.40 2844.8847 8.9744 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

1.25 31.75 2974.1976 9.3823 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

1.50 38.10 3103.5105 9.7902 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

1.75 44.45 3232.8235 10.198 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

2.00 50.80 3362.1364 10.606 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

2.25 57.15 3491.4494 11.014 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

2.50 63.50 3620.7623 11.422 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

2.75 69.85 3750.0752 11.83 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

3.00 76.20 3879.3882 12.238 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

3.25 82.55 4008.7011 12.646 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

3.50 88.90 4138.0141 13.054 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

3.75 95.25 4267.327 13.462 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

4.00 101.60 4396.6399 13.87 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

4.25 107.95 4525.9529 14.277 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

4.50 114.30 4655.2658 14.685 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

4.75 120.65 4784.5788 15.093 0.00E+00 0.00E+00 0.00E+00 6.96E-02 3.15E-02

5.00 127.00 4913.8917 15.501 3.40E-03 1.45E-01 6.56E-02 6.93E-02 3.14E-02

5.25 133.35 5043.2046 15.909 1.11E-02 4.71E-01 2.14E-01 6.88E-02 3.12E-02

5.50 139.70 5172.5176 16.317 1.90E-02 8.07E-01 3.66E-01 6.82E-02 3.10E-02

5.75 146.05 5301.8305 16.725 2.70E-02 1.15E+00 5.22E-01 6.77E-02 3.07E-02

6.00 152.40 5431.1435 17.133 3.53E-02 1.50E+00 6.82E-01 6.71E-02 3.04E-02

6.25 158.75 5560.4564 17.541 4.38E-02 1.86E+00 8.45E-01 6.65E-02 3.02E-02

6.50 165.10 5689.7693 17.949 5.25E-02 2.23E+00 1.01E+00 6.59E-02 2.99E-02

6.75 171.45 5819.0823 18.357 6.13E-02 2.61E+00 1.18E+00 6.53E-02 2.96E-02

7.00 177.80 5948.3952 18.765 7.04E-02 3.00E+00 1.36E+00 6.47E-02 2.93E-02

7.25 184.15 6077.7081 19.173 7.97E-02 3.39E+00 1.54E+00 6.40E-02 2.90E-02

7.50 190.50 6207.0211 19.58 8.92E-02 3.80E+00 1.72E+00 6.34E-02 2.87E-02

7.75 196.85 6336.334 19.988 9.88E-02 4.21E+00 1.91E+00 6.27E-02 2.84E-02

8.00 203.20 6465.647 20.396 1.09E-01 4.63E+00 2.10E+00 6.20E-02 2.81E-02

8.25 209.55 6594.9599 20.804 1.19E-01 5.06E+00 2.29E+00 6.13E-02 2.78E-02

8.50 215.90 6724.2728 21.212 1.29E-01 5.49E+00 2.49E+00 6.06E-02 2.75E-02

8.75 222.25 6853.5858 21.62 1.40E-01 5.94E+00 2.69E+00 5.98E-02 2.71E-02

9.00 228.60 6982.8987 22.028 1.50E-01 6.39E+00 2.90E+00 5.91E-02 2.68E-02

9.25 234.95 6594.9599 20.804 1.61E-01 6.84E+00 3.10E+00 5.84E-02 2.65E-02

9.50 241.30 6207.0211 19.58 1.71E-01 7.26E+00 3.29E+00 5.77E-02 2.62E-02

9.75 247.65 5819.0823 18.357 1.80E-01 7.65E+00 3.47E+00 5.70E-02 2.59E-02

10.00 254.00 5431.1435 17.133 1.89E-01 8.03E+00 3.64E+00 5.64E-02 2.56E-02

10.25 260.35 5043.2046 15.909 1.97E-01 8.37E+00 3.80E+00 5.59E-02 2.53E-02

10.50 266.70 4655.2658 14.685 2.04E-01 8.69E+00 3.94E+00 5.54E-02 2.51E-02

10.75 273.05 4267.327 13.462 2.11E-01 8.98E+00 4.07E+00 5.49E-02 2.49E-02

11.00 279.40 3879.3882 12.238 2.17E-01 9.25E+00 4.19E+00 5.44E-02 2.47E-02

11.25 285.75 3491.4494 11.014 2.23E-01 9.49E+00 4.30E+00 5.40E-02 2.45E-02

11.50 292.10 3103.5105 9.7902 2.28E-01 9.71E+00 4.40E+00 5.37E-02 2.44E-02

11.75 298.45 2715.5717 8.5665 2.33E-01 9.90E+00 4.49E+00 5.34E-02 2.42E-02

12.00 304.80 2327.6329 7.3427 2.36E-01 1.01E+01 4.56E+00 5.31E-02 2.41E-02

Results for RBHT Test 1651

Valid Time Period 4959 to 5100 seconds
A-559

Figure A-465 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651F for Time Period 4959 to 5100 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-560

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-G 

Test Conditions

Date: 7/1/2003

Steady-state time window: 5280 – 5379 seconds

Inlet flow rate: 2.024 cm/sec (0.797 in./sec) 

Inlet mass flow rate: 0.096 kg/sec (0.211 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-561

Figure A-466 Inlet Flow Plot for Experiment 1651G 

Figure A-467 Inlet Temperature Plot for Experiment 1651G 
A-562

Figure A-468 System Pressure Plot for Experiment 1651G 

Figure A-469 Bundle Power Plot for Experiment 1651G 
A-563

Table A-187: Data Results for RBHT Test 1651 for Time Period 5280 to 5379 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.567 24.715 1183.363 0.363 17.381 0.091 4.357 0.000 0.000 24.25 1161.096 5784.25 276951.3766 0.575 0.572 0.578

* 120-133 3048-3378 383 0.617 25.873 1238.814 0.396 18.961 0.163 7.804 -3.386 -162.114 28.7 1374.163 5812.95 278325.5399 0.575 0.572 0.578

* 108-120 2743-3048 382 0.502 31.015 1484.985 0.320 15.322 0.204 9.768 3.921 187.718 26.57 1272.178 5839.52 279597.7184 0.574 0.571 0.577

100-108 2540-2743 381 0.565 18.078 865.578 0.184 8.810 0.149 7.134 0.000 0.000 17.74 849.396 5857.26 280447.1141 0.573 0.570 0.576

97-100 2464-2540 380 0.425 8.953 428.686 0.062 2.969 0.054 2.586 0.000 0.000 8.833 422.926 5866.093 280870.0404 0.433 0.431 0.435

93-97 2362-2464 379 0.452 11.389 545.307 0.077 3.687 0.070 3.352 0.000 0.000 11.24 538.174 5877.333 281408.2145 0.459 0.457 0.461

* 85-93 2159-2362 378 0.360 26.585 1272.880 0.135 6.464 0.135 6.464 4.385 209.938 21.93 1050.014 5899.263 282458.2286 0.472 0.470 0.474

81-85 2057-2159 377 0.479 10.818 517.955 0.058 2.777 0.065 3.112 0.000 0.000 10.69 511.840 5909.953 282970.0685 0.485 0.483 0.487

78-81 1981-2057 376 0.360 9.971 477.423 0.039 1.867 0.047 2.250 0.000 0.000 9.884 473.248 5919.837 283443.317 0.365 0.363 0.367

75-78 1905-1981 375 0.333 10.397 497.813 0.035 1.676 0.046 2.202 0.000 0.000 10.31 493.645 5930.147 283936.9624 0.338 0.336 0.340

72-75 1829-1905 374 0.266 11.441 547.794 0.031 1.484 0.045 2.155 0.000 0.000 11.36 543.920 5941.507 284480.8821 0.271 0.270 0.272

* 67-72 1702-1829 373 0.232 19.937 954.598 0.042 2.011 0.073 3.495 -0.778 -37.242 20.6 986.333 5962.107 285467.2154 0.206 0.205 0.207

63-67 1600-1702 372 0.138 17.901 857.124 0.024 1.149 0.056 2.681 0.000 0.000 17.81 852.747 5979.917 286319.9628 0.142 0.141 0.14360-63 1524-1600 371 0.049 14.822 709.670 0.011 0.527 0.041 1.963 0.000 0.000 14.76 706.713 5994.677 287026.6754 0.052 0.049 0.055

57-60 1448-1524 370 0.070 14.484 693.507 0.005 0.239 0.024 1.149 0.000 0.000 14.45 691.870 6009.127 287718.5451 0.072 0.068 0.076

53-57 1346-1448 369 0.055 19.641 940.424 0.001 0.048 0.000 0.000 0.000 0.000 19.63 939.889 6028.757 288658.4346 0.055 0.052 0.058

* 46-53 1168-1346 368 0.053 34.437 1648.851 0.001 0.048 0.000 0.000 -0.154 -7.375 34.59 1656.178 6063.347 290314.6126 0.048 0.046 0.050

43-46 1092-1168 367 0.041 14.936 715.140 0.001 0.048 0.000 0.000 0.000 0.000 14.93 714.852 6078.277 291029.4649 0.042 0.040 0.044

37-43 940-1092 366 0.040 29.914 1432.270 0.001 0.048 0.000 0.000 0.000 0.000 29.9 1431.620 6108.177 292461.0846 0.04 0.038 0.042

* 25-37 635-940 365 0.032 60.357 2889.903 0.002 0.096 0.000 0.000 0.235 11.246 60.12 2878.561 6168.297 295339.6456 0.035 0.033 0.037

13-25 330-635 364 0.030 60.461 2894.876 0.002 0.096 0.000 0.000 0.000 0.000 60.44 2893.883 6228.737 298233.5283 0.03 0.029 0.032

* 0-13 0-330 363 0.021 66.116 3165.665 0.003 0.144 0.000 0.000 -0.367 -17.558 66.48 3183.079 6295.217 301416.6078 0.015 0.014 0.016

Results for RBHT Test 1651

Valid Time Period 5280 to 5379 seconds

Collapsed Liquid Level = 104.856 inches = 2663.33 mm

 (Zosv) Onset of Significant Void = 55 inches = 1397 mm

Table A-187 Data Results for RBHT Test 1651

G for Time Period 5280 to 5379 seconds
A-564

Table A-188 Energy Balance Results for RBHT Test 1651G for Time Period 5280 to 5379 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2326.4808 7.339 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

0.25 6.35 2455.7298 7.7468 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

0.50 12.70 2584.9787 8.1545 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

0.75 19.05 2714.2276 8.5622 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

1.00 25.40 2843.4766 8.9699 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

1.25 31.75 2972.7255 9.3777 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

1.50 38.10 3101.9744 9.7854 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

1.75 44.45 3231.2234 10.193 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

2.00 50.80 3360.4723 10.601 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

2.25 57.15 3489.7213 11.009 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

2.50 63.50 3618.9702 11.416 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

2.75 69.85 3748.2191 11.824 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

3.00 76.20 3877.4681 12.232 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

3.25 82.55 4006.717 12.639 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

3.50 88.90 4135.9659 13.047 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

3.75 95.25 4265.2149 13.455 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

4.00 101.60 4394.4638 13.863 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

4.25 107.95 4523.7127 14.27 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

4.50 114.30 4652.9617 14.678 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

4.75 120.65 4782.2106 15.086 0.00E+00 0.00E+00 0.00E+00 6.89E-02 3.13E-02

5.00 127.00 4911.4595 15.494 4.46E-03 1.88E-01 8.53E-02 6.86E-02 3.11E-02

5.25 133.35 5040.7085 15.901 1.22E-02 5.15E-01 2.34E-01 6.81E-02 3.09E-02

5.50 139.70 5169.9574 16.309 2.01E-02 8.50E-01 3.86E-01 6.75E-02 3.06E-02

5.75 146.05 5299.2063 16.717 2.83E-02 1.19E+00 5.42E-01 6.70E-02 3.04E-02

6.00 152.40 5428.4553 17.124 3.66E-02 1.55E+00 7.02E-01 6.64E-02 3.01E-02

6.25 158.75 5557.7042 17.532 4.52E-02 1.91E+00 8.65E-01 6.58E-02 2.99E-02

6.50 165.10 5686.9532 17.94 5.39E-02 2.28E+00 1.03E+00 6.52E-02 2.96E-02

6.75 171.45 5816.2021 18.348 6.29E-02 2.66E+00 1.20E+00 6.46E-02 2.93E-02

7.00 177.80 5945.451 18.755 7.20E-02 3.04E+00 1.38E+00 6.40E-02 2.90E-02

7.25 184.15 6074.7 19.163 8.14E-02 3.44E+00 1.56E+00 6.33E-02 2.87E-02

7.50 190.50 6203.9489 19.571 9.09E-02 3.84E+00 1.74E+00 6.27E-02 2.84E-02

7.75 196.85 6333.1978 19.979 1.01E-01 4.25E+00 1.93E+00 6.20E-02 2.81E-02

8.00 203.20 6462.4468 20.386 1.11E-01 4.67E+00 2.12E+00 6.13E-02 2.78E-02

8.25 209.55 6591.6957 20.794 1.21E-01 5.10E+00 2.31E+00 6.06E-02 2.75E-02

8.50 215.90 6720.9446 21.202 1.31E-01 5.54E+00 2.51E+00 5.99E-02 2.72E-02

8.75 222.25 6850.1936 21.609 1.42E-01 5.98E+00 2.71E+00 5.92E-02 2.68E-02

9.00 228.60 6979.4425 22.017 1.53E-01 6.44E+00 2.92E+00 5.84E-02 2.65E-02

9.25 234.95 6591.6957 20.794 1.63E-01 6.89E+00 3.12E+00 5.77E-02 2.62E-02

9.50 241.30 6203.9489 19.571 1.73E-01 7.30E+00 3.31E+00 5.70E-02 2.59E-02

9.75 247.65 5816.2021 18.348 1.82E-01 7.70E+00 3.49E+00 5.64E-02 2.56E-02

10.00 254.00 5428.4553 17.124 1.91E-01 8.07E+00 3.66E+00 5.58E-02 2.53E-02

10.25 260.35 5040.7085 15.901 1.99E-01 8.41E+00 3.82E+00 5.52E-02 2.50E-02

10.50 266.70 4652.9617 14.678 2.07E-01 8.73E+00 3.96E+00 5.47E-02 2.48E-02

10.75 273.05 4265.2149 13.455 2.14E-01 9.02E+00 4.09E+00 5.42E-02 2.46E-02

11.00 279.40 3877.4681 12.232 2.20E-01 9.29E+00 4.21E+00 5.38E-02 2.44E-02

11.25 285.75 3489.7213 11.009 2.26E-01 9.53E+00 4.32E+00 5.34E-02 2.42E-02

11.50 292.10 3101.9744 9.7854 2.31E-01 9.75E+00 4.42E+00 5.30E-02 2.40E-02

11.75 298.45 2714.2276 8.5622 2.36E-01 9.94E+00 4.51E+00 5.27E-02 2.39E-02

12.00 304.80 2326.4808 7.339 2.39E-01 1.01E+01 4.58E+00 5.24E-02 2.38E-02

Results for RBHT Test 1651

Valid Time Period 5280 to 5379 seconds
A-565

Figure A-470 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651G for Time Period 5280 to 5379 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-566

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-H 

Test Conditions

Date: 7/1/2003

Steady-state time window: 1590 – 1650 seconds

Inlet flow rate: 1.509 cm/sec (0.594 in./sec) 

Inlet mass flow rate: 0.071 kg/sec (0.157 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-567

Figure A-471 Inlet Flow Plot for Experiment 1651H 

Figure A-472 Inlet Temperature Plot for Experiment 1651H 
A-568

Figure A-473 System Pressure Plot for Experiment 1651H 

Figure A-474 Bundle Power Plot for Experiment 1651H 
A-569

Table A-189: Data Results for RBHT Test 1651 for Time Period 1590 to 1650 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.623 21.558 1032.179 0.284 13.598 0.068 3.256 0.000 0.000 21.2 1015.061 5781.2 276805.3418 0.629 0.626 0.632

* 120-133 3048-3378 383 0.650 23.656 1132.637 0.311 14.891 0.122 5.841 -1.977 -94.678 25.2 1206.582 5806.4 278011.9242 0.627 0.624 0.630* 108-120 2743-3048 382 0.539 28.761 1377.068 0.255 12.209 0.152 7.278 4.824 230.958 23.53 1126.622 5829.93 279138.5467 0.622 0.619 0.625

100-108 2540-2743 381 0.614 16.037 767.856 0.148 7.086 0.111 5.315 0.000 0.000 15.77 755.072 5845.7 279893.6183 0.62 0.617 0.623

97-100 2464-2540 380 0.461 8.403 402.329 0.051 2.442 0.040 1.915 0.000 0.000 8.31 397.885 5854.01 280291.5033 0.467 0.465 0.469

93-97 2362-2464 379 0.495 10.501 502.786 0.064 3.064 0.052 2.490 0.000 0.000 10.38 496.997 5864.39 280788.5003 0.5 0.498 0.503

* 85-93 2159-2362 378 0.393 25.203 1206.737 0.115 5.506 0.101 4.836 5.687 272.306 19.3 924.089 5883.69 281712.5893 0.535 0.532 0.538

81-85 2057-2159 377 0.566 9.016 431.670 0.051 2.442 0.048 2.298 0.000 0.000 8.916 426.900 5892.606 282139.4897 0.571 0.568 0.57478-81 1981-2057 376 0.413 9.140 437.638 0.035 1.676 0.035 1.676 0.000 0.000 9.064 433.987 5901.67 282573.4763 0.418 0.416 0.42075-78 1905-1981 375 0.418 9.073 434.405 0.033 1.580 0.034 1.628 0.000 0.000 9.001 430.970 5910.671 283004.4465 0.422 0.420 0.42472-75 1829-1905 374 0.316 10.662 510.495 0.030 1.436 0.034 1.628 0.000 0.000 10.59 507.052 5921.261 283511.4984 0.32 0.318 0.322

* 67-72 1702-1829 373 0.318 17.720 848.421 0.044 2.107 0.054 2.586 0.792 37.904 16.83 805.825 5938.091 284317.3232 0.352 0.350 0.354

63-67 1600-1702 372 0.380 12.874 616.423 0.030 1.436 0.042 2.011 0.000 0.000 12.8 612.867 5950.891 284930.1905 0.384 0.382 0.38660-63 1524-1600 371 0.279 11.228 537.599 0.019 0.910 0.031 1.484 0.000 0.000 11.18 535.301 5962.071 285465.4917 0.283 0.282 0.28457-60 1448-1524 370 0.236 11.908 570.173 0.016 0.766 0.030 1.436 0.000 0.000 11.86 567.860 5973.931 286033.3516 0.239 0.238 0.24053-57 1346-1448 369 0.140 17.865 855.383 0.017 0.814 0.038 1.819 0.000 0.000 17.81 852.747 5991.741 286886.099 0.143 0.142 0.144

* 46-53 1168-1346 368 0.063 34.063 1630.948 0.016 0.766 0.053 2.538 1.154 55.256 32.84 1572.388 6024.581 288458.4866 0.096 0.091 0.101

43-46 1092-1168 367 0.050 14.796 708.427 0.000 0.000 0.000 0.000 0.000 0.000 14.79 708.149 6039.371 289166.6356 0.05 0.048 0.05337-43 940-1092 366 0.047 29.711 1422.572 0.001 0.048 0.000 0.000 0.000 0.000 29.7 1422.044 6069.071 290588.6792 0.046 0.044 0.048

* 25-37 635-940 365 0.037 60.014 2873.492 0.001 0.048 0.000 0.000 0.183 8.768 59.83 2864.676 6128.901 293453.355 0.04 0.038 0.042

13-25 330-635 364 0.033 60.274 2885.924 0.001 0.048 0.000 0.000 0.000 0.000 60.25 2884.785 6189.151 296338.1405 0.033 0.031 0.035

* 0-13 0-330 363 0.022 66.028 3161.437 0.001 0.048 0.000 0.000 -0.353 -16.902 66.38 3178.291 6255.531 299516.432 0.016 0.015 0.017

Results for RBHT Test 1651

Valid Time Period 1590 to 1650 seconds

Collapsed Liquid Level = 97.834 inches = 2484.98 mm

 (Zosv) Onset of Significant Void = 44.5 inches = 1130 mm

Table A-189 Data Results for RBHT Test 1651

H for Time Period 1590 to 1650 seconds
A-570

Table A-190 Energy Balance Results for RBHT Test 1651H for Time Period 1590 to 1650 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2333.2631 7.3604 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

0.25 6.35 2462.8888 7.7694 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

0.50 12.70 2592.5146 8.1783 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

0.75 19.05 2722.1403 8.5872 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

1.00 25.40 2851.766 8.9961 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

1.25 31.75 2981.3917 9.405 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

1.50 38.10 3111.0175 9.8139 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

1.75 44.45 3240.6432 10.223 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

2.00 50.80 3370.2689 10.632 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

2.25 57.15 3499.8947 11.041 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

2.50 63.50 3629.5204 11.45 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

2.75 69.85 3759.1461 11.858 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

3.00 76.20 3888.7718 12.267 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

3.25 82.55 4018.3976 12.676 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

3.50 88.90 4148.0233 13.085 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

3.75 95.25 4277.649 13.494 0.00E+00 0.00E+00 0.00E+00 5.14E-02 2.33E-02

4.00 101.60 4407.2748 13.903 2.37E-03 7.44E-02 3.37E-02 5.13E-02 2.33E-02

4.25 107.95 4536.9005 14.312 1.17E-02 3.68E-01 1.67E-01 5.08E-02 2.30E-02

4.50 114.30 4666.5262 14.721 2.13E-02 6.70E-01 3.04E-01 5.03E-02 2.28E-02

4.75 120.65 4796.1519 15.13 3.12E-02 9.81E-01 4.45E-01 4.98E-02 2.26E-02

5.00 127.00 4925.7777 15.539 4.13E-02 1.30E+00 5.89E-01 4.93E-02 2.23E-02

5.25 133.35 5055.4034 15.948 5.18E-02 1.63E+00 7.38E-01 4.87E-02 2.21E-02

5.50 139.70 5185.0291 16.357 6.24E-02 1.96E+00 8.90E-01 4.82E-02 2.19E-02

5.75 146.05 5314.6549 16.765 7.34E-02 2.31E+00 1.05E+00 4.76E-02 2.16E-02

6.00 152.40 5444.2806 17.174 8.46E-02 2.66E+00 1.21E+00 4.70E-02 2.13E-02

6.25 158.75 5573.9063 17.583 9.61E-02 3.02E+00 1.37E+00 4.64E-02 2.11E-02

6.50 165.10 5703.532 17.992 1.08E-01 3.39E+00 1.54E+00 4.58E-02 2.08E-02

6.75 171.45 5833.1578 18.401 1.20E-01 3.77E+00 1.71E+00 4.52E-02 2.05E-02

7.00 177.80 5962.7835 18.81 1.32E-01 4.16E+00 1.89E+00 4.46E-02 2.02E-02

7.25 184.15 6092.4092 19.219 1.45E-01 4.55E+00 2.06E+00 4.39E-02 1.99E-02

7.50 190.50 6222.0349 19.628 1.58E-01 4.96E+00 2.25E+00 4.33E-02 1.96E-02

7.75 196.85 6351.6607 20.037 1.71E-01 5.37E+00 2.44E+00 4.26E-02 1.93E-02

8.00 203.20 6481.2864 20.446 1.84E-01 5.79E+00 2.63E+00 4.19E-02 1.90E-02

8.25 209.55 6610.9121 20.855 1.98E-01 6.22E+00 2.82E+00 4.12E-02 1.87E-02

8.50 215.90 6740.5379 21.264 2.12E-01 6.66E+00 3.02E+00 4.05E-02 1.84E-02

8.75 222.25 6870.1636 21.672 2.26E-01 7.11E+00 3.22E+00 3.98E-02 1.80E-02

9.00 228.60 6999.7893 22.081 2.41E-01 7.56E+00 3.43E+00 3.90E-02 1.77E-02

9.25 234.95 6610.9121 20.855 2.55E-01 8.01E+00 3.63E+00 3.83E-02 1.74E-02

9.50 241.30 6222.0349 19.628 2.68E-01 8.43E+00 3.82E+00 3.76E-02 1.71E-02

9.75 247.65 5833.1578 18.401 2.81E-01 8.83E+00 4.00E+00 3.70E-02 1.68E-02

10.00 254.00 5444.2806 17.174 2.93E-01 9.20E+00 4.17E+00 3.64E-02 1.65E-02

10.25 260.35 5055.4034 15.948 3.03E-01 9.54E+00 4.33E+00 3.58E-02 1.62E-02

10.50 266.70 4666.5262 14.721 3.14E-01 9.86E+00 4.47E+00 3.53E-02 1.60E-02

10.75 273.05 4277.649 13.494 3.23E-01 1.02E+01 4.60E+00 3.48E-02 1.58E-02

11.00 279.40 3888.7718 12.267 3.31E-01 1.04E+01 4.73E+00 3.44E-02 1.56E-02

11.25 285.75 3499.8947 11.041 3.39E-01 1.07E+01 4.84E+00 3.40E-02 1.54E-02

11.50 292.10 3111.0175 9.8139 3.46E-01 1.09E+01 4.93E+00 3.36E-02 1.52E-02

11.75 298.45 2722.1403 8.5872 3.52E-01 1.11E+01 5.02E+00 3.33E-02 1.51E-02

12.00 304.80 2333.2631 7.3604 3.57E-01 1.12E+01 5.10E+00 3.30E-02 1.50E-02

Results for RBHT Test 1651

Valid Time Period 1590 to 1650 seconds
A-571

Figure A-475 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651H for Time Period 1590 to 1650 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-572

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-I 

Test Conditions

Date: 7/1/2003

Steady-state time window: 2415 – 2505 seconds

Inlet flow rate: 1.524 cm/sec (0.600 in./sec) 

Inlet mass flow rate: 0.072 kg/sec (0.158 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-573

Figure A-476 Inlet Flow Plot for Experiment 1651I 

Figure A-477 Inlet Temperature Plot for Experiment 1651I 
A-574

Figure A-478 System Pressure Plot for Experiment 1651I 

Figure A-479 Bundle Power Plot for Experiment 1651I 
A-575

Table A-191: Data Results for RBHT Test 1651 for Time Period 2415 to 2505 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.629 21.194 1014.773 0.286 13.694 0.069 3.304 0.000 0.000 20.83 997.346 5780.83 276787.6261 0.635 0.632 0.638

* 120-133 3048-3378 383 0.647 23.806 1139.848 0.314 15.034 0.123 5.889 -1.461 -69.942 24.83 1188.867 5805.66 277976.4929 0.632 0.629 0.635

* 108-120 2743-3048 382 0.540 28.688 1373.587 0.257 12.305 0.153 7.326 4.978 238.346 23.3 1115.610 5828.96 279092.1028 0.626 0.623 0.629

100-108 2540-2743 381 0.617 15.928 762.634 0.150 7.182 0.112 5.363 0.000 0.000 15.66 749.805 5844.62 279841.9077 0.623 0.620 0.626

97-100 2464-2540 380 0.468 8.283 396.609 0.051 2.442 0.041 1.963 0.000 0.000 8.19 392.139 5852.81 280234.047 0.474 0.472 0.476

93-97 2362-2464 379 0.498 10.433 499.554 0.064 3.064 0.053 2.538 0.000 0.000 10.31 493.645 5863.12 280727.6924 0.503 0.500 0.506

* 85-93 2159-2362 378 0.393 25.208 1206.986 0.116 5.554 0.102 4.884 5.810 278.205 19.18 918.343 5882.3 281646.0358 0.538 0.535 0.541

81-85 2057-2159 377 0.568 8.969 429.432 0.051 2.442 0.049 2.346 0.000 0.000 8.868 424.602 5891.168 282070.6379 0.573 0.570 0.57678-81 1981-2057 376 0.416 9.094 435.400 0.035 1.676 0.036 1.724 0.000 0.000 9.018 431.784 5900.186 282502.422 0.421 0.419 0.42375-78 1905-1981 375 0.420 9.042 432.914 0.033 1.580 0.035 1.676 0.000 0.000 8.972 429.582 5909.158 282932.0037 0.424 0.422 0.42672-75 1829-1905 374 0.318 10.631 509.003 0.030 1.436 0.034 1.628 0.000 0.000 10.56 505.616 5919.718 283437.6192 0.322 0.320 0.324

* 67-72 1702-1829 373 0.323 17.590 842.205 0.045 2.155 0.055 2.633 0.730 34.943 16.76 802.473 5936.478 284240.0923 0.354 0.352 0.356

63-67 1600-1702 372 0.384 12.807 613.191 0.030 1.436 0.042 2.011 0.000 0.000 12.73 609.516 5949.208 284849.608 0.387 0.385 0.38960-63 1524-1600 371 0.283 11.166 534.615 0.020 0.958 0.031 1.484 0.000 0.000 11.11 531.950 5960.318 285381.5576 0.286 0.285 0.28757-60 1448-1524 370 0.249 11.706 560.475 0.017 0.814 0.030 1.436 0.000 0.000 11.65 557.805 5971.968 285939.3626 0.252 0.251 0.25353-57 1346-1448 369 0.155 17.548 840.215 0.017 0.814 0.039 1.867 0.000 0.000 17.49 837.426 5989.458 286776.7883 0.158 0.157 0.159

* 46-53 1168-1346 368 0.065 34.001 1627.964 0.016 0.766 0.053 2.538 1.382 66.158 32.55 1558.502 6022.008 288335.2907 0.104 0.103 0.105

43-46 1092-1168 367 0.050 14.796 708.427 0.000 0.000 0.000 0.000 0.000 0.000 14.79 708.149 6036.798 289043.4397 0.051 0.048 0.05437-43 940-1092 366 0.047 29.706 1422.324 0.001 0.048 0.000 0.000 0.000 0.000 29.7 1422.044 6066.498 290465.4833 0.047 0.045 0.049

* 25-37 635-940 365 0.037 60.009 2873.243 0.001 0.048 0.000 0.000 0.188 8.998 59.82 2864.197 6126.318 293329.6803 0.04 0.038 0.042

13-25 330-635 364 0.033 60.269 2885.676 0.001 0.048 0.000 0.000 0.000 0.000 60.25 2884.785 6186.568 296214.4658 0.033 0.031 0.035

* 0-13 0-330 363 0.022 66.033 3161.686 0.002 0.096 0.000 0.000 -0.349 -16.701 66.38 3178.291 6252.948 299392.7572 0.016 0.015 0.017

Results for RBHT Test 1651

Valid Time Period 2415 to 2505 seconds

Collapsed Liquid Level = 97.502 inches = 2476.54 mm

 (Zosv) Onset of Significant Void = 44.5 inches = 1130 mm

Table A-191 Data Results for RBHT Test 1651I for Time Period 2415 to 2505 seconds
A-576

Table A-192 Energy Balance Results for RBHT Test 1651I for Time Period 2415 to 2505 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2329.5308 7.3487 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

0.25 6.35 2458.9492 7.7569 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

0.50 12.70 2588.3676 8.1652 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

0.75 19.05 2717.7859 8.5734 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

1.00 25.40 2847.2043 8.9817 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

1.25 31.75 2976.6227 9.39 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

1.50 38.10 3106.0411 9.7982 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

1.75 44.45 3235.4595 10.206 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

2.00 50.80 3364.8778 10.615 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

2.25 57.15 3494.2962 11.023 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

2.50 63.50 3623.7146 11.431 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

2.75 69.85 3753.133 11.84 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

3.00 76.20 3882.5513 12.248 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

3.25 82.55 4011.9697 12.656 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

3.50 88.90 4141.3881 13.064 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

3.75 95.25 4270.8065 13.473 0.00E+00 0.00E+00 0.00E+00 5.18E-02 2.35E-02

4.00 101.60 4400.2249 13.881 2.14E-03 6.77E-02 3.07E-02 5.17E-02 2.35E-02

4.25 107.95 4529.6432 14.289 1.14E-02 3.61E-01 1.64E-01 5.13E-02 2.32E-02

4.50 114.30 4659.0616 14.697 2.09E-02 6.63E-01 3.01E-01 5.08E-02 2.30E-02

4.75 120.65 4788.48 15.106 3.07E-02 9.73E-01 4.41E-01 5.03E-02 2.28E-02

5.00 127.00 4917.8984 15.514 4.07E-02 1.29E+00 5.86E-01 4.97E-02 2.26E-02

5.25 133.35 5047.3168 15.922 5.10E-02 1.62E+00 7.34E-01 4.92E-02 2.23E-02

5.50 139.70 5176.7351 16.33 6.16E-02 1.95E+00 8.86E-01 4.87E-02 2.21E-02

5.75 146.05 5306.1535 16.739 7.24E-02 2.30E+00 1.04E+00 4.81E-02 2.18E-02

6.00 152.40 5435.5719 17.147 8.35E-02 2.65E+00 1.20E+00 4.75E-02 2.16E-02

6.25 158.75 5564.9903 17.555 9.49E-02 3.01E+00 1.37E+00 4.69E-02 2.13E-02

6.50 165.10 5694.4086 17.963 1.07E-01 3.38E+00 1.53E+00 4.63E-02 2.10E-02

6.75 171.45 5823.827 18.372 1.19E-01 3.76E+00 1.71E+00 4.57E-02 2.07E-02

7.00 177.80 5953.2454 18.78 1.31E-01 4.15E+00 1.88E+00 4.51E-02 2.04E-02

7.25 184.15 6082.6638 19.188 1.43E-01 4.54E+00 2.06E+00 4.44E-02 2.02E-02

7.50 190.50 6212.0822 19.596 1.56E-01 4.94E+00 2.24E+00 4.38E-02 1.99E-02

7.75 196.85 6341.5005 20.005 1.69E-01 5.36E+00 2.43E+00 4.31E-02 1.95E-02

8.00 203.20 6470.9189 20.413 1.82E-01 5.78E+00 2.62E+00 4.24E-02 1.92E-02

8.25 209.55 6600.3373 20.821 1.96E-01 6.21E+00 2.82E+00 4.17E-02 1.89E-02

8.50 215.90 6729.7557 21.229 2.09E-01 6.64E+00 3.01E+00 4.10E-02 1.86E-02

8.75 222.25 6859.174 21.638 2.24E-01 7.09E+00 3.22E+00 4.03E-02 1.83E-02

9.00 228.60 6988.5924 22.046 2.38E-01 7.55E+00 3.42E+00 3.95E-02 1.79E-02

9.25 234.95 6600.3373 20.821 2.52E-01 7.99E+00 3.62E+00 3.88E-02 1.76E-02

9.50 241.30 6212.0822 19.596 2.65E-01 8.41E+00 3.82E+00 3.81E-02 1.73E-02

9.75 247.65 5823.827 18.372 2.78E-01 8.81E+00 4.00E+00 3.75E-02 1.70E-02

10.00 254.00 5435.5719 17.147 2.89E-01 9.18E+00 4.16E+00 3.69E-02 1.67E-02

10.25 260.35 5047.3168 15.922 3.00E-01 9.52E+00 4.32E+00 3.63E-02 1.65E-02

10.50 266.70 4659.0616 14.697 3.10E-01 9.84E+00 4.46E+00 3.58E-02 1.62E-02

10.75 273.05 4270.8065 13.473 3.19E-01 1.01E+01 4.60E+00 3.53E-02 1.60E-02

11.00 279.40 3882.5513 12.248 3.28E-01 1.04E+01 4.72E+00 3.49E-02 1.58E-02

11.25 285.75 3494.2962 11.023 3.35E-01 1.06E+01 4.83E+00 3.45E-02 1.56E-02

11.50 292.10 3106.0411 9.7982 3.42E-01 1.09E+01 4.93E+00 3.41E-02 1.55E-02

11.75 298.45 2717.7859 8.5734 3.48E-01 1.10E+01 5.01E+00 3.38E-02 1.53E-02

12.00 304.80 2329.5308 7.3487 3.54E-01 1.12E+01 5.09E+00 3.35E-02 1.52E-02

Results for RBHT Test 1651

Valid Time Period 2415 to 2505 seconds
A-577

Figure A-480 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651I for Time Period 2415 to 2505 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-578

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-J 

Test Conditions

Date: 7/1/2003

Steady-state time window: 5960 – 6257 seconds

Inlet flow rate: 1.019 cm/sec (0.401 in./sec) 

Inlet mass flow rate: 0.048 kg/sec (0.106 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-579

Figure A-481 Inlet Flow Plot for Experiment 1651J 

Figure A-482 Inlet Temperature Plot for Experiment 1651J 
A-580

Figure A-483 System Pressure Plot for Experiment 1651J 

Figure A-484 Bundle Power Plot for Experiment 1651J 
A-581

Table A-193: Data Results for RBHT Test 1651 for Time Period 5960 to 6257 seconds Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.695 17.413 833.750 0.202 9.672 0.046 2.202 0.000 0.000 17.16 821.625 5777.16 276611.9055 0.7 0.697 0.704

* 120-133 3048-3378 383 0.685 21.267 1018.254 0.222 10.629 0.082 3.926 0.363 17.366 20.6 986.333 5797.76 277598.2388 0.695 0.692 0.698* 108-120 2743-3048 382 0.580 26.154 1252.242 0.183 8.762 0.103 4.932 6.258 299.616 19.61 938.932 5817.37 278537.1707 0.685 0.682 0.688

100-108 2540-2743 381 0.676 13.456 644.273 0.107 5.123 0.075 3.591 0.000 0.000 13.27 635.371 5830.64 279172.5417 0.681 0.678 0.684

97-100 2464-2540 380 0.513 7.582 363.041 0.037 1.772 0.027 1.293 0.000 0.000 7.515 359.820 5838.155 279532.3618 0.518 0.515 0.521

93-97 2362-2464 379 0.542 9.509 455.293 0.047 2.250 0.035 1.676 0.000 0.000 9.423 451.176 5847.578 279983.5375 0.546 0.543 0.549

* 85-93 2159-2362 378 0.420 24.081 1153.027 0.085 4.070 0.068 3.256 7.018 336.046 16.91 809.655 5864.488 280793.1926 0.593 0.590 0.596

81-85 2057-2159 377 0.636 7.556 361.797 0.038 1.819 0.033 1.580 0.000 0.000 7.483 358.288 5871.971 281151.4806 0.64 0.637 0.64378-81 1981-2057 376 0.476 8.159 390.642 0.027 1.293 0.024 1.149 0.000 0.000 8.104 388.022 5880.075 281539.5022 0.48 0.478 0.48275-78 1905-1981 375 0.503 7.738 370.500 0.026 1.245 0.023 1.101 0.000 0.000 7.687 368.056 5887.762 281907.5577 0.506 0.503 0.50972-75 1829-1905 374 0.407 9.234 442.114 0.024 1.149 0.023 1.101 0.000 0.000 9.183 439.684 5896.945 282347.2421 0.41 0.408 0.412

* 67-72 1702-1829 373 0.373 16.281 779.543 0.037 1.772 0.037 1.772 2.227 106.634 13.98 669.366 5910.925 283016.6081 0.462 0.460 0.464

63-67 1600-1702 372 0.510 10.184 487.618 0.026 1.245 0.028 1.341 0.000 0.000 10.12 484.548 5921.045 283501.1563 0.513 0.510 0.51660-63 1524-1600 371 0.359 9.987 478.169 0.018 0.862 0.021 1.005 0.000 0.000 9.946 476.217 5930.991 283977.3733 0.361 0.359 0.36357-60 1448-1524 370 0.339 10.304 493.337 0.016 0.766 0.020 0.958 0.000 0.000 10.26 491.251 5941.251 284468.6248 0.341 0.339 0.34353-57 1346-1448 369 0.322 14.079 674.112 0.020 0.958 0.026 1.245 0.000 0.000 14.03 671.760 5955.281 285140.3848 0.324 0.322 0.326

* 46-53 1168-1346 368 0.226 28.153 1347.975 0.028 1.341 0.043 2.059 3.312 158.581 24.77 1185.994 5980.051 286326.3788 0.318 0.316 0.320

43-46 1092-1168 367 0.311 10.740 514.225 0.009 0.431 0.018 0.862 0.000 0.000 10.71 512.798 5990.761 286839.1763 0.313 0.311 0.31537-43 940-1092 366 0.141 26.761 1281.335 0.012 0.575 0.034 1.628 0.000 0.000 26.7 1278.403 6017.461 288117.5792 0.143 0.142 0.144

* 25-37 635-940 365 0.048 59.318 2840.171 0.010 0.479 0.016 0.766 2.632 126.031 56.66 2712.895 6074.121 290830.4745 0.091 0.086 0.096

13-25 330-635 364 0.038 59.936 2869.762 0.001 0.048 0.000 0.000 0.000 0.000 59.91 2868.506 6134.031 293698.9807 0.038 0.036 0.040

* 0-13 0-330 363 0.023 65.935 3156.962 0.001 0.048 0.000 0.000 -0.266 -12.759 66.2 3169.673 6200.231 296868.6537 0.019 0.018 0.020

Results for RBHT Test 1651

Valid Time Period 5960 to 6257 seconds

Collapsed Liquid Level = 89.163 inches = 2264.74 mm

 (Zosv) Onset of Significant Void = 31 inches = 787.5 mm

Table A-193 Data Results for RBHT Test 1651

J for Time Period 5960 to 6257 seconds
A-582

Table A-194 Energy Balance Results for RBHT Test 1651J for Time Period 5960 to 6257 seconds

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2333.6816 7.3618 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

0.25 6.35 2463.3306 7.7708 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

0.50 12.70 2592.9796 8.1797 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

0.75 19.05 2722.6286 8.5887 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

1.00 25.40 2852.2776 8.9977 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

1.25 31.75 2981.9265 9.4067 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

1.50 38.10 3111.5755 9.8157 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

1.75 44.45 3241.2245 10.225 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

2.00 50.80 3370.8735 10.634 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

2.25 57.15 3500.5225 11.043 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

2.50 63.50 3630.1714 11.452 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

2.75 69.85 3759.8204 11.861 0.00E+00 0.00E+00 0.00E+00 3.47E-02 1.57E-02

3.00 76.20 3889.4694 12.27 7.79E-03 1.65E-01 7.50E-02 3.44E-02 1.56E-02

3.25 82.55 4019.1184 12.679 2.00E-02 4.25E-01 1.93E-01 3.40E-02 1.54E-02

3.50 88.90 4148.7674 13.088 3.27E-02 6.93E-01 3.14E-01 3.35E-02 1.52E-02

3.75 95.25 4278.4164 13.497 4.57E-02 9.70E-01 4.40E-01 3.31E-02 1.50E-02

4.00 101.60 4408.0653 13.906 5.92E-02 1.25E+00 5.69E-01 3.26E-02 1.48E-02

4.25 107.95 4537.7143 14.315 7.30E-02 1.55E+00 7.03E-01 3.21E-02 1.46E-02

4.50 114.30 4667.3633 14.724 8.72E-02 1.85E+00 8.40E-01 3.16E-02 1.44E-02

4.75 120.65 4797.0123 15.133 1.02E-01 2.16E+00 9.81E-01 3.11E-02 1.41E-02

5.00 127.00 4926.6613 15.542 1.17E-01 2.48E+00 1.13E+00 3.06E-02 1.39E-02

5.25 133.35 5056.3102 15.95 1.32E-01 2.81E+00 1.27E+00 3.01E-02 1.36E-02

5.50 139.70 5185.9592 16.359 1.48E-01 3.14E+00 1.43E+00 2.95E-02 1.34E-02

5.75 146.05 5315.6082 16.768 1.65E-01 3.49E+00 1.58E+00 2.90E-02 1.31E-02

6.00 152.40 5445.2572 17.177 1.81E-01 3.84E+00 1.74E+00 2.84E-02 1.29E-02

6.25 158.75 5574.9062 17.586 1.98E-01 4.21E+00 1.91E+00 2.78E-02 1.26E-02

6.50 165.10 5704.5551 17.995 2.16E-01 4.57E+00 2.07E+00 2.72E-02 1.23E-02

6.75 171.45 5834.2041 18.404 2.34E-01 4.95E+00 2.25E+00 2.66E-02 1.21E-02

7.00 177.80 5963.8531 18.813 2.52E-01 5.34E+00 2.42E+00 2.59E-02 1.18E-02

7.25 184.15 6093.5021 19.222 2.70E-01 5.74E+00 2.60E+00 2.53E-02 1.15E-02

7.50 190.50 6223.1511 19.631 2.90E-01 6.14E+00 2.79E+00 2.46E-02 1.12E-02

7.75 196.85 6352.8 20.04 3.09E-01 6.55E+00 2.97E+00 2.40E-02 1.09E-02

8.00 203.20 6482.449 20.449 3.29E-01 6.98E+00 3.16E+00 2.33E-02 1.06E-02

8.25 209.55 6612.098 20.858 3.49E-01 7.41E+00 3.36E+00 2.26E-02 1.02E-02

8.50 215.90 6741.747 21.267 3.70E-01 7.84E+00 3.56E+00 2.18E-02 9.91E-03

8.75 222.25 6871.396 21.676 3.91E-01 8.29E+00 3.76E+00 2.11E-02 9.58E-03

9.00 228.60 7001.0449 22.085 4.12E-01 8.75E+00 3.97E+00 2.04E-02 9.24E-03

9.25 234.95 6612.098 20.858 4.33E-01 9.19E+00 4.17E+00 1.96E-02 8.91E-03

9.50 241.30 6223.1511 19.631 4.53E-01 9.62E+00 4.36E+00 1.90E-02 8.60E-03

9.75 247.65 5834.2041 18.404 4.72E-01 1.00E+01 4.54E+00 1.83E-02 8.30E-03

10.00 254.00 5445.2572 17.177 4.89E-01 1.04E+01 4.71E+00 1.77E-02 8.03E-03

10.25 260.35 5056.3102 15.95 5.06E-01 1.07E+01 4.86E+00 1.71E-02 7.77E-03

10.50 266.70 4667.3633 14.724 5.21E-01 1.10E+01 5.01E+00 1.66E-02 7.54E-03

10.75 273.05 4278.4164 13.497 5.34E-01 1.13E+01 5.14E+00 1.61E-02 7.32E-03

11.00 279.40 3889.4694 12.27 5.47E-01 1.16E+01 5.27E+00 1.57E-02 7.12E-03

11.25 285.75 3500.5225 11.043 5.59E-01 1.18E+01 5.37E+00 1.53E-02 6.94E-03

11.50 292.10 3111.5755 9.8157 5.69E-01 1.21E+01 5.47E+00 1.49E-02 6.78E-03

11.75 298.45 2722.6286 8.5887 5.78E-01 1.23E+01 5.56E+00 1.46E-02 6.64E-03

12.00 304.80 2333.6816 7.3618 5.86E-01 1.24E+01 5.64E+00 1.44E-02 6.52E-03

Results for RBHT Test 1651

Valid Time Period 5960 to 6257 seconds
A-583

Figure A-485 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651J for Time Period 5960 to 6257 seconds

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction
A-584

RBHT Two-Phase Mixture Level and Uncovery Test INT-1651-K 

Test Conditions

Date: 7/1/2003

Steady-state time window: 6600 – test end seconds

Inlet flow rate: 0.650 cm/sec (0.256 in./sec) 

Inlet mass flow rate: 0.031 kg/sec (0.068 lbm/sec) 

Inlet flow temperature: 348.2 K (167.0 oF)

Upper plenum pressure: 271.7 kPa (39.4 psia)

Bundle power: 72.27 kW 
A-585

Figure A-486 Inlet Flow Plot for Experiment 1651K 

Figure A-487 Inlet Temperature Plot for Experiment 1651K 
A-586

Figure A-488 System Pressure Plot for Experiment 1651K 

Figure A-489 Bundle Power Plot for Experiment 1651K 
A-587

Table A-195: Data Results for RBHT Test 1651 for Time Period 6600 seconds to Test End Grids Elevation Elevation Chan. αuncorrected ΔPuncorrected ΔPuncorrected ΔPfric ΔPfric ΔPaccel ΔPaccel ΔPgrid ΔPgrid ΔPcorrected ΔPcorrected Plocal Plocal αcorrected αmin αmax (in) (mm) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa) (lbf/ft2

) (Pa)

133-144 3378-3658 384 0.914 4.923 235.728 0.121 5.794 0.028 1.341 0.000 0.000 4.772 228.485 5764.772 276018.7649 0.916 0.911 0.921

* 120-133 3048-3378 383 0.860 9.467 453.303 0.138 6.607 0.051 2.442 0.677 32.436 8.601 411.818 5773.373 276430.583 0.873 0.869 0.877

* 108-120 2743-3048 382 0.720 17.424 834.248 0.116 5.554 0.063 3.016 3.835 183.603 13.41 642.074 5786.783 277072.6572 0.785 0.781 0.789

100-108 2540-2743 381 0.738 10.880 520.938 0.069 3.304 0.046 2.202 0.000 0.000 10.76 515.192 5797.543 277587.8488 0.741 0.737 0.745

97-100 2464-2540 380 0.641 5.588 267.556 0.024 1.149 0.017 0.814 0.000 0.000 5.543 265.400 5803.086 277853.2491 0.644 0.641 0.647

93-97 2362-2464 379 0.640 7.478 358.067 0.030 1.436 0.022 1.053 0.000 0.000 7.425 355.511 5810.511 278208.76 0.643 0.640 0.646

* 85-93 2159-2362 378 0.465 22.227 1064.256 0.056 2.681 0.042 2.011 8.049 385.410 14.08 674.154 5824.591 278882.914 0.661 0.658 0.664

81-85 2057-2159 377 0.678 6.699 320.769 0.025 1.197 0.020 0.958 0.000 0.000 6.652 318.499 5831.243 279201.4135 0.68 0.677 0.683

78-81 1981-2057 376 0.520 7.473 357.819 0.018 0.862 0.015 0.718 0.000 0.000 7.437 356.085 5838.68 279557.4989 0.523 0.520 0.526

75-78 1905-1981 375 0.541 7.156 342.651 0.017 0.814 0.014 0.670 0.000 0.000 7.121 340.955 5845.801 279898.4543 0.543 0.540 0.546

72-75 1829-1905 374 0.486 8.008 383.431 0.016 0.766 0.014 0.670 0.000 0.000 7.976 381.893 5853.777 280280.3472 0.488 0.486 0.490

* 67-72 1702-1829 373 0.387 15.907 761.639 0.025 1.197 0.023 1.101 3.919 187.651 11.94 571.690 5865.717 280852.0374 0.54 0.537 0.543

63-67 1600-1702 372 0.591 8.507 407.302 0.018 0.862 0.017 0.814 0.000 0.000 8.467 405.402 5874.184 281257.4396 0.592 0.589 0.595

60-63 1524-1600 371 0.409 9.208 440.871 0.013 0.622 0.013 0.622 0.000 0.000 9.18 439.541 5883.364 281696.9803 0.411 0.409 0.413

57-60 1448-1524 370 0.388 9.540 456.785 0.012 0.575 0.012 0.575 0.000 0.000 9.514 455.533 5892.878 282152.5131 0.389 0.387 0.391

53-57 1346-1448 369 0.381 12.859 615.677 0.014 0.670 0.016 0.766 0.000 0.000 12.83 614.304 5905.708 282766.8168 0.382 0.380 0.384

* 46-53 1168-1346 368 0.281 26.133 1251.247 0.021 1.005 0.027 1.293 5.625 269.319 20.46 979.630 5926.168 283746.4469 0.437 0.435 0.439

43-46 1092-1168 367 0.490 7.941 380.198 0.008 0.383 0.011 0.527 0.000 0.000 7.922 379.307 5934.09 284125.7543 0.491 0.489 0.493

37-43 940-1092 366 0.348 20.322 972.999 0.013 0.622 0.021 1.005 0.000 0.000 20.28 971.012 5954.37 285096.7659 0.349 0.347 0.351

* 25-37 635-940 365 0.210 49.254 2358.272 0.015 0.718 0.037 1.772 0.082 3.904 49.12 2351.878 6003.49 287448.6441 0.212 0.211 0.213

13-25 330-635 364 0.074 57.698 2762.590 0.002 0.096 0.003 0.144 0.000 0.000 57.68 2761.733 6061.17 290210.3773 0.074 0.070 0.078

* 0-13 0-330 363 0.028 65.644 3143.037 0.000 0.000 0.000 0.000 0.654 31.299 64.99 3111.738 6126.16 293322.1152 0.037 0.035 0.039

 (Z2φ) Two-Phase Level (Dryout) = 124.70 inches = 3167.38 mm

 (S) Level Swell = 2.0121

Results for RBHT Test 1651

Valid Time Period 6600 to 9999 seconds

Collapsed Liquid Level = 74.096 inches = 1882.04 mm

 (Zosv) Onset of Significant Void = 19 inches = 482.5 mm

Table A-195 Data Results for RBHT Test 1651

K for Time Period 6600 seconds to Test End
A-588

Table A-196 Energy Balance Results for RBHT Test 1651K for Time Period 6600 seconds to test 

end

Elevation Elevation q"w q"w x Jg Jg Jf Jf

(in) (mm) BTU/hr-ft2 KW/m2 (ft/sec) (m/sec) (ft/sec) (m/sec)

0.00 0.00 2258.2977 7.124 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

0.25 6.35 2383.7586 7.5197 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

0.50 12.70 2509.2196 7.9155 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

0.75 19.05 2634.6806 8.3113 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

1.00 25.40 2760.1416 8.7071 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

1.25 31.75 2885.6026 9.1028 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

1.50 38.10 3011.0636 9.4986 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

1.75 44.45 3136.5245 9.8944 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

2.00 50.80 3261.9855 10.29 0.00E+00 0.00E+00 0.00E+00 2.21E-02 1.00E-02

2.25 57.15 3387.4465 10.686 1.56E-02 2.11E-01 9.59E-02 2.18E-02 9.88E-03

2.50 63.50 3512.9075 11.082 3.23E-02 4.38E-01 1.99E-01 2.14E-02 9.71E-03

2.75 69.85 3638.3685 11.477 4.97E-02 6.73E-01 3.05E-01 2.10E-02 9.54E-03

3.00 76.20 3763.8294 11.873 6.76E-02 9.16E-01 4.16E-01 2.06E-02 9.36E-03

3.25 82.55 3889.2904 12.269 8.62E-02 1.17E+00 5.30E-01 2.02E-02 9.17E-03

3.50 88.90 4014.7514 12.665 1.05E-01 1.43E+00 6.47E-01 1.98E-02 8.98E-03

3.75 95.25 4140.2124 13.061 1.25E-01 1.70E+00 7.69E-01 1.94E-02 8.78E-03

4.00 101.60 4265.6734 13.456 1.46E-01 1.97E+00 8.94E-01 1.89E-02 8.58E-03

4.25 107.95 4391.1343 13.852 1.67E-01 2.26E+00 1.02E+00 1.84E-02 8.36E-03

4.50 114.30 4516.5953 14.248 1.88E-01 2.55E+00 1.16E+00 1.80E-02 8.15E-03

4.75 120.65 4642.0563 14.644 2.10E-01 2.85E+00 1.29E+00 1.75E-02 7.93E-03

5.00 127.00 4767.5173 15.039 2.33E-01 3.16E+00 1.43E+00 1.70E-02 7.70E-03

5.25 133.35 4892.9783 15.435 2.57E-01 3.48E+00 1.58E+00 1.65E-02 7.46E-03

5.50 139.70 5018.4393 15.831 2.81E-01 3.80E+00 1.72E+00 1.59E-02 7.22E-03

5.75 146.05 5143.9002 16.227 3.05E-01 4.13E+00 1.88E+00 1.54E-02 6.97E-03

6.00 152.40 5269.3612 16.623 3.30E-01 4.48E+00 2.03E+00 1.48E-02 6.72E-03

6.25 158.75 5394.8222 17.018 3.56E-01 4.83E+00 2.19E+00 1.42E-02 6.46E-03

6.50 165.10 5520.2832 17.414 3.83E-01 5.19E+00 2.35E+00 1.37E-02 6.20E-03

6.75 171.45 5645.7442 17.81 4.10E-01 5.55E+00 2.52E+00 1.31E-02 5.92E-03

7.00 177.80 5771.2051 18.206 4.37E-01 5.93E+00 2.69E+00 1.24E-02 5.65E-03

7.25 184.15 5896.6661 18.601 4.66E-01 6.31E+00 2.86E+00 1.18E-02 5.36E-03

7.50 190.50 6022.1271 18.997 4.95E-01 6.70E+00 3.04E+00 1.12E-02 5.07E-03

7.75 196.85 6147.5881 19.393 5.24E-01 7.10E+00 3.22E+00 1.05E-02 4.78E-03

8.00 203.20 6273.0491 19.789 5.54E-01 7.51E+00 3.41E+00 9.86E-03 4.47E-03

8.25 209.55 6398.51 20.185 5.85E-01 7.93E+00 3.60E+00 9.18E-03 4.17E-03

8.50 215.90 6523.971 20.58 6.16E-01 8.35E+00 3.79E+00 8.49E-03 3.85E-03

8.75 222.25 6649.432 20.976 6.48E-01 8.78E+00 3.98E+00 7.78E-03 3.53E-03

9.00 228.60 6774.893 21.372 6.81E-01 9.23E+00 4.18E+00 7.06E-03 3.20E-03

9.25 234.95 6398.51 20.185 7.13E-01 9.66E+00 4.38E+00 6.36E-03 2.88E-03

9.50 241.30 6022.1271 18.997 7.43E-01 1.01E+01 4.57E+00 5.69E-03 2.58E-03

9.75 247.65 5645.7442 17.81 7.71E-01 1.05E+01 4.74E+00 5.06E-03 2.30E-03

10.00 254.00 5269.3612 16.623 7.98E-01 1.08E+01 4.90E+00 4.48E-03 2.03E-03

10.25 260.35 4892.9783 15.435 8.22E-01 1.11E+01 5.05E+00 3.93E-03 1.78E-03

10.50 266.70 4516.5953 14.248 8.45E-01 1.15E+01 5.19E+00 3.43E-03 1.56E-03

10.75 273.05 4140.2124 13.061 8.66E-01 1.17E+01 5.32E+00 2.96E-03 1.34E-03

11.00 279.40 3763.8294 11.873 8.85E-01 1.20E+01 5.44E+00 2.54E-03 1.15E-03

11.25 285.75 3387.4465 10.686 9.02E-01 1.22E+01 5.55E+00 2.16E-03 9.79E-04

11.50 292.10 3011.0636 9.4986 9.18E-01 1.24E+01 5.64E+00 1.81E-03 8.23E-04

11.75 298.45 2634.6806 8.3113 9.32E-01 1.26E+01 5.73E+00 1.51E-03 6.86E-04

12.00 304.80 2258.2977 7.124 9.44E-01 1.28E+01 5.80E+00 1.25E-03 5.67E-04

Results for RBHT Test 1651

Valid Time Period 6600 to 9999 seconds
A-589

Figure A-490 Void Fraction Comparison Plot Before and After Applying Corrections for 

Experiment 1651K for Time Period 6600 seconds to Test End

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00

0 0.5 1 1.5 2 2.5 3 3.5 4

Length (m)

α

0 20 40 60 80 100 120 140

Length (in)

Uncorrected Void Fraction

Corrected Void Fraction





NUREG/CR-7218

Volume 1

Rod Bundle Heat Transfer Facility Two-Phase Mixture Level Swell and Uncovery 

Test Experiments Data Report