Document: NUREG-0800
Document ID: 1dda396e-398a-4b85-aa13-c5c1dbf82bc2
Document Type: srp
Title: MINIMUM CONTAINMENT PRESSURE ANALYSIS FOR EMERGENCY CORE COOLING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340670.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.1.5
CFR Part: 
CFR Title: 

Content:
ul Uses of Atomic Energy, Volume 13, Session 3.9, United Nations, Geneva (1964). 4. Schmitt, R. C., Bingham, G. E., and Manberg, J. A., "Simulated Design Basis Accident Tests of the Carolinas Virginia Tube Reactor Containment - Final Report," IN-1403, Idaho Nuclear Corporation, December 1970. 6.2.1.5-7 Rev. 2 - July 1981 TABLE 1 IDENTIFICATION OF CONTAINMENT HEAT SINKS 1. Containment Building (e.g., liner plate and external concrete walls, floor, sump, and linear anchors). 2. Containment Internal Structures (e.g., internal separation walls and floors, refueling pool and fuel transfer pit walls, and shielding walls) 3. Supports (e.g., reactor vessel, steam generator, pumps, tanks, major components, pipe supports, and storage racks) 4. Uninsulated Systems and Components (e.g., cold water systems, heating, ventilation and air conditioning systems, pumps, motors, fan coolers, recombiners, and tanks) 5. Miscellaneous Equipment (e.g., ladders, gratings, electrical cables, trays, and cranes) TABLE 2 HEAT SINK THERMOPHYSICAL PROPERTIES Material Concrete Steel Density lb/ft3 145 490 Specific Heat Btu/lb-OF 0.156 0.12 Thermal Conductivity Btu/hr-ft-0F 0.92 27.0 TABLE 3 UCHIDA HEAT TRANSFER COEFFICIENTS Mass Ratio (lb air/lb steam) 50 20 18 14 10 7 5 4 Heat Transfer Coefficient (Btu/hr-ft 2-F0 ) 2 8 9 10 14 17 21 24 Mass Ratio (lb air/lb steam) 3 2.3 1.8 1.3 0.8 0.5 0.1 Heat Transfer Coefficient (Btu/hr-ft 2-F 0) 29 37 46 63 98 140 280 6.2.1.5-8 Rev. 2 - July 1981 Figure 1 Area of Steel Heat Sinks Inside Containment 5 (n ;~3 as¢ WC I.W r_ :cW 4J CNI _ 4j _4- Ln 4J X - 4. c F-4 4 3 2 1 1 1 C.4 -a $-A Containment Free Volume, x 106 ft 3 Figure 2 Condensing Heat Transfer Coefficients for Static Heat Sinks 4-, .9- U .9- 4: v}c 0 s- N 4-, !-I 4- oto EU as C0 :C I-i to hmax = 4 x hTagami I 0h hstag + (hmax - hstag) e O25(ttp) hstag = 1 U2 x hUchida I I I I I blowdown tf Time ref lood l