# DOCKET NO: A-98-49; II-A4-164

WASTE CHARACTERIZATION TIER 1 CHANGE REPORT:

EVALUATION OF THE CALIBRATION CHANGES TO THE HIGH EFFICIENCY

NEUTRON COUNTER UNIT 1 AND TO THE SUPER HIGH EFFICIENCY NEUTRON

COUNTER NONDESTRUCTIVE ASSAY SYSTEMS AT THE

LOS ALAMOS NATIONAL LABORATORY

CENTRAL CHARACTERIZATION PROJECT

U.S. Environmental Protection Agency

Office of Radiation and Indoor Air

Center of Federal Regulations

1200 Pennsylvania Avenue, NW

Washington, DC 20460

August 2012

# i 

# TABLE OF CONTENTS

Section Page

Abbreviations, Acronyms and Initializations ................................................................................. i i

1.0 Introdcution 

# ....................................................................................................... 1

2.0 Purpose of Tier 1 Evaluations ........................................................................... 1

3.0 Purpose of This Report ..................................................................................... 2

4.0 Scope of Evaluation .......................................................................................... 2

5.0 Evaluation Team ............................................................................................... 3

6.0 Technical Evaluation ........................................................................................ 4

6.1 High Efficiency Neutron Counter Unit 1 .......................................................... 4

6.2 Super High Efficiency Neutron Counter ........................................................... 8

7.0 Summary of Tier 1 Evaluation ........................................................................ 12

8.0 Conclusion 

# ....................................................................................................... 12

ATTACHMENTS

Attachment A Summary of LANL- CCP Contact-Handled Approvals

Attachment B Documents Reviewed for This Evaluation

Attachment C HENC No. 1 Replicate Testing Results

Attachment D SuperHENC Replicate Testing Results

# ii 

# ABBREVIATIONS, ACRONYMS AND INITIALIZATIONS

Am americium

BDR batch data report

CBFO Carlsbad Field Office

CCP Central Characterization Project

CFR Code of Federal Regulations

CH contact-handled

Ci curie

Cs cesium

DOE U.S. Department of Energy

EPA U.S. Environmental Protection Agency

Eu europium

g gram

g/cc grams per cubic centimeter

HENC High Efficiency Neutron Counter

HENC No. 1 High Efficiency Neutron Counter Unit 1

HENC No. 2 High Efficiency Neutron Counter Unit 2

HQ headquarters

HS Pu heat source plutonium

LANL Los Alamos National Laboratory

LOQI list of qualified individuals

MDA minimum detectable activity

MDC minimum detectable concentration

nCi/g nanocuries per gram

NDA nondestructive assay

Np neptunium

NTP National TRU Programs

PDP Performance Demonstration Program

Pu plutonium

RSD relative standard deviation

Sr strontium

# iii 

# SuperHENC Super High Efficiency Neutron Counter

SWB standard waste box

T1 Tier 1

TMU Total Measurement Uncertainty

TRU transuranic

U uranium

WG weapons grade

WIPP Waste Isolation Pilot Plant

WTS Washington TRU Solutions

# 1 

# 1.0 INTRODUCTION

This report supports the U.S. E nvironmental Protection Agency’s (EPA’s) approval of two Tier 1

(T1) changes for nondestructive assay (NDA) systems at Los Alamos National Laboratory

(LANL) operated by the Central Characterization Project (CCP): (1) extension of the gamma

density range of the High Efficiency Neutron Counter (HENC), Unit 1 (H ENC No. 1), requested

by the Carlsbad Field Office (CBFO) on Ma y 24, 2012, and (2) extension of the gamma

calibration range for the Super High Efficiency Neutron Counter (SuperHENC), requested on

June 4, 2012. EPA evaluated these changes dur ing a site visit at LANL on June 20–21, 2012.

In accordance with Title 40 of the Code of Federal Regulations (40 CFR) 194.8(b), EPA

conducted Baseline Inspection No. EPA-L ANL-CCP-05.05-8 of LANL-CCP on May 3–5, 2005.

As a result of this baseline inspection, EP A approved the LANL-CCP waste characterization

program with conditions and limitations as docum ented in the LANL baseline final inspection

report (see EPA Docket No. A-98-49, II-A4-88). This baseline approval included two HENCs

Unit 1 and Unit 2). In October 2011, EPA approved the SuperHENC as a T1 change (see Docket

No. A-98-49, II-A4-153).

LANL-CCP requested the T1 change to the HE NC No. 1 baseline appr oval to allow HENC

No. 1 to assay lead-lined containers in th e same manner as EPA approved for HENC Unit 2

(HENC No. 2) in November 2010. This T1 change is to extend the gamma density range of the

SuperHENC since its initial appr oval in October 2011. Based on this evaluation, EPA determines

and approves that the calibrati on changes for both instruments, HENC No. 2 and SuperHENC,

are adequate to assay contact-handled (CH) tran suranic (TRU) wastes in the instrument-specific

configurations detailed in th e LANL-CCP calibration reports . Changes to the approved

components of both NDA systems must follow the tiering requirements described in the baseline

inspection report issued for the LANL-CCP CH program (Docket No. A-98-49, II-A4-88, June

2007).

Attachment A lists all of EPA’ s previous LANL CH approvals.

2.0 PURPOSE OF TIER 1 EVALUATIONS

Any changes to the waste characterization activities from the date of the baseline inspection must

be specified in the LANL-CCP baseline final re port cited above. Unde r the changes to 40 CFR

194.8 promulgated in the July 16, 2004, Federal Re gister notice, EPA must perform a single

baseline inspection of a TRU waste generator si te’s waste characteriza tion program and approve

the program. EPA’s approval must be based on the demonstration that the program’s

components, with applicable c onditions and limitations, can adequa tely characterize TRU wastes

and comply with the regulatory requirements im posed on TRU wastes destined for disposal at

the Waste Isolation Pilot Plant (WIPP). An EPA inspection team conducts an onsite inspection to

verify that the site’s system of controls is technically adequate a nd properly implemented.

Following EPA’s approval of waste characteri zation processes evalua ted during the baseline

inspection, EPA is authorized to evaluate and approve, if necessary, ch anges to the site’s

approved waste characterization program by conducting additional inspections under the

# 2 

# authority of 40 CFR 194.24(h). Under 40 CFR 194.24, EPA has the authority to conduct

continued compliance inspections to verify that the site continues to use only the approved waste

characterization processes to ch aracterize the waste and remains in compliance with all of the

regulatory requirements. Based on the adequacies of the waste characterization processes

demonstrated during the baseline inspecti on, including all conditions and limitations, EPA

specified which subsequent waste characteriza tion program changes or modifications must

undergo further EPA approval under 40 CFR 194.24. This was accomplished by assigning a tier

level to each aspect of LANL-CCP’s characteriza tion program. T1 activities have more stringent

reporting requirements and require that the U.S. Department of Energy (DOE) notify EPA, and

that EPA provide approval prior to implementa tion. The rule under which baseline inspections

are conducted can be found in the Federa l Register (Vol. 69, No. 136, pages 42571–42583;

July 16, 2004).

3.0 PURPOSE OF THIS REPORT

This report documents the basis for EPA’s technical evaluation of the T1 change to allow HENC

No. 1 to assay lead-lined drums and to expand the density range of the SuperHENC to assay

lead-lined drums in standard waste boxes (SWBs) . Specifically, this repor t does the following:

 Describes the proposed changes to the LANL HENC No. 1 and SuperHENC systems and

evaluates the technical aspects of the changes.

 Provides objective evidence of outstanding findings or concerns, as applicable.

 Describes any tests or demonstrations comple ted during the course of the inspection and

their relevance to EP A’s approval decision.

 Documents the basis for EPA’s approval of the proposed changes to both systems and

presents the results of th eir technical evaluation.

EPA’s evaluation of HENC No.1 and the SuperH ENC will be conveyed to DOE separately by

letter. More information is also on EPA’s website at

http://www.epa.gov/rpdweb00/WIPP/inspection.html in accordance with 40 CFR 194.8(b)(3).

4.0 SCOPE OF EVALUATION

The scope of this evaluation included aspect s of two different LANL-CCP NDA systems:

(1) changes to the calibration of the HENC No. 1 to allow the assa y of lead-lined containers and

(2) extension of the density range for the SuperH ENC, as described in this report. EPA assessed

the personnel, practices and pro cedures for both systems relative to their previous approvals.

Once EPA determined that specific aspects of the systems were unchanged, those aspects were

not evaluated and EPA focused on the technical adequacy and documentation of the aspects of

both systems that changed. The specific aspect s of the evaluation in cluded the following:

# 3 

#  Confirmation that the LANL-C CP HENC No. 1 and SuperH ENC NDA systems were the

same systems in the same operational confi gurations that EPA had approved previously.

 Qualification and training for personnel responsible for the calibration, performance

testing, operation, and data reporting and valid ation of HENC No. 1 and the SuperHENC.

 LANL-CCP procedures for the calibration, operation, and data re porting and validation

for HENC No. 1 and the SuperHENC.

 Performance tests that LANL-CCP used to accept the operations of both systems and the

pedigree of radionuclide sources used for calibrati on and performance testing.

 Assessment of the calibrated or operational ranges of both systems in terms of

radionuclide type and activ ity, and sample matrix.

 Ability of the proposed configurations of both systems to identify and quantify the 10

WIPP-tracked radionuclides [plutonium-238 ( 238 

# Pu), 239 

# Pu, 240 

# Pu, 242 

# Pu, uranium-233

( 233 

# U), 234 

# U, 238 

# U, americium-241 ( 241 

# Am), strontium-90 ( 90 

# Sr) and cesium-137 ( 137 

# Cs)]

and assign an uncertainty to each measured value.

 Successful participation in the CBFO-s ponsored NDA Performance Demonstration

Program (NDA PDP).

Attachment B identifies the objective evidence th at EPA examined for its evaluation of HENC

No. 1 and the SuperHENC.

5.0 EVALUATION TEAM

All personnel involved in the HENC No.1 and SuperHENC evaluation are listed in Table 1,

along with each person’s aff iliation and function for the pur pose of this inspection.

Table 1. Evaluation Personnel

Personnel Affiliation Evaluation Function – Area of

Expertise

Edward Feltcorn US EPA HQ EPA Evaluation Team Leader

Rajani Joglekar US EPA HQ EPA Inspector

Patrick Kelly SC&A EPA Inspector, NDA

Rose Gogliotti* SC&A EPA Inspector, NDA

Tom Morgan DOE/CBFO NTP Representative

Richard C. Baumann Canberra NDA Technical Support

Joe Wachter Canberra NDA Technical Support

Craig Simmons WTS CCP Project Manager

Neil Dickes CCP NDA Technical Support

Sean Stanfield Canberra NDA Technical Support

Jared Francis Canberra NDA Technical Support

Ron Reeves CCP Project Manager

Joe Stepzinski CCP Vendor Project Manager

* Was not present for the onsite inspection.

# 4 

# 6.0 TECHNICAL EVALUATION

EPA evaluated both systems during the site vis it to LANL. Each system is described in a

separate section below.

6.1 High Efficiency Neutron Counter Unit 1

(1) The design and operational hi story of HENC No. 1 were a ssessed and were found to be

unchanged from the previous approval.

HENC No. 1 is located at TA-54, on Pad 10 in Ar ea G at LANL. EPA confirmed that it has not

been relocated since EPA’s initial approva l. HENC No. 1 is a multicomponent gamma

spectrometry and passive neutron NDA system to assay WIPP-bound CH TRU waste in 55-

gallon drums without lead linings, as described in deta il in previous EPA reports (see section 1.0,

above). EPA determined that these aspects were unaffected by this T1change. For the T1 change

to allow HENC No. 1 to assay lead-lined drums, the passive neutron modality of the system was

not changed because the majority of activity in lead-lined drums is attributable to 241 

# Am. This

change affected only the HENC No. 1 gamma e fficiency calibration for use with a cadmium

filter and lead drum liner, from approximately 200 to 1,228 kiloelectron volts.

The lead-lined containers or iginate in Waste Stream LA-C IN01.001. With their addition, the

measurement configurations for HENC No. 1 within a 55-gallon drum are as follows:

 Loose S5000 debris waste, no lead liner.

 Thirty-five 1-gallon cans packed in five layers of seven cans each, no lead liner.

 Thirty-five 1-gallon cans packed in five laye rs with a lead liner in the 55-gallon drum.

 Thirty 1-gallon cans packed in five layers of six cans each with a hollow core in the

center of the 55-gallon drum to keep all of the 1-gallon cans against th e inside wall of the

drum.

The details of the lead liner for the 55-gallon dr um are shown in Figure 1. Note that the figure

dimensions may vary from actual 55-gallon drums used.

There are no technical concerns regarding the design and operational history of HENC No. 1 for

any of the measurement configurations.

# 5 Source: MCS-HENC#1-NDA-1005, Figure 2



# Figure 1

. Lead-Lined Drum Configuration

(2) The qualifications and training for NDA pers onnel were evaluated and were found to be

adequate and appropriately documented.

EPA evaluated the CCP-LANL list of qualif ied individuals (LOQI) dated June 15, 2012,

2:39 p.m., for all HENC No. 1 personnel. The traini ng was current for all Op erators, Independent

Technical Reviewers and Expert Analysts for both HENC No. 1 and HENC No. 2. There were

no concerns regarding the training and qua lifications of HENC No. 1 personnel.

(3) Changes to the gamma efficiency calibrati on to accommodate assaying lead-lined drums

were evaluated and found to be technically adequate and appropriately documented.

The gamma component has separate calibrations for energy, resolution, reference peak (pulser)

and efficiency. The energy, resolution and refere nce peak calibrations had been performed

previously and approved by EPA. Efficiency ca librations were perfor med initially in 2004,

modified in 2005, and extended to 2.1 grams per cubic centimeters (g/cc) in 2007 for non-leadlined drums. A separate effici ency calibration for lead-lined drums was performed in April 2012,

as documented in MCS-HENC#1-NDA-1005-Lead -Lined, Revision 0. The calibration used

mixed gamma sources containing 241 

# Am and europium-152 ( 152 

# Eu) placed in five lead-lined

55-gallon drums, each containing a different matrix as follows: (1) an empty drum (0.03 g/cc),

(2) Homasote® (0.51 g/cc), (3) particle board ( 0.66 g/cc), (4) sand (1.49 g/ cc) and (4) concrete

# 6 

# (1.79 g/cc). The highest matrix density value of 1.79 g/cc was extrapolated using modeling based

on Canberra’s In-Situ Object Counting System (ISOCS) results, allowing the maximum to be

extended to approximately 2.15 g/cc. The configur ation of the matrix drums and the resulting

calibration curve from all five matrices are shown in MCS-HENC#1-NDA-1005-Lead-Lined,

Revision 0, Figures 1 and 2, respectively. EPA found minor errors in MCS-HENC#1-NDA1005-Lead-Lined, Revision 0, which were co mmunicated to LANL-CCP. There were no

concerns regarding the technica l adequacy of the lead-lined efficiency calibration for HENC

No.1.

(4) The lead-lined efficiency calibration was validated using independent sources.

LANL-CCP validated the lead-lined efficiency ca libration using the lead-lined concrete matrix

drum containing 107 g weapons grade (WG) Pu, which consisted of a 50-gram (g) WG Pu

source, No. RANT50-1, and a 65-g WG Pu source, No. NTP0164. The assays were evaluated in

terms of accuracy (percent recove ry) and precision (percent relati ve standard deviation or RSD),

using the criteria in DOE-WI PP-02-3133, Appendix A, Table 3.2. The validation assays passed

the criteria for accuracy (±30%) and precision (< 14% RSD). There were no concerns regarding

the technical adequacy of the lead-lined effi ciency calibration validation for HENC No. 1.

(5) The lead-lined calibration was c onfirmed using independent sources.

The lead-lined gamma efficiency calibration wa s confirmed by measuring WG or heat source

plutonium (HS Pu) sources in a standard zero -matrix drum (No. PDP-001). Each drum was

measured six times for a total of 48 measurements. Mass loadings of 0.6 g, 15 g, 160 g and 217 g

were selected as representative of typical waste drums for primarily 239 

# Pu (WG Pu) waste forms;

mass loadings of 0.3 g, 7 g, 10 g and 18 g were select ed as representative of typical waste drums

for primarily 238 

# Pu (HS Pu) waste forms. The measur ements were performed following the

procedure for unknown waste drums. All mass load ings passed the criteria for accuracy (±30%)

and precision (<14% RSD) excep t the 0.6-gram WG Pu loading. Based on this determination,

LANL-CCP established an administrative limit of 2 grams of total Pu; all assays that show less

than 2 g of total Pu are subject to Expert Anal yst review. There were no concerns regarding the

technical adequacy of the l ead-lined efficiency calibrati on confirmation for HENC No.1.

(6) The lead-lined gamma efficiency calibrati on of HENC No. 1 demons trates that the unit

has the ability to iden tify and quantify the 10 WIPP-tracked radionuclides.

The lead-lined gamma efficiency calibration of HENC No. 1 did not sign ificantly affect the

system’s ability to identify and quantify the 10 WIPP-tracked radionuclides, as evidenced by the

data in MCS-HENC#1-NDA-1005-Lead-Lined, Revi sion 0. EPA may revisit this once a larger

number of lead-lined drums have been assayed on HENC No. 1. There ar e no concerns regarding

the ability of HENC No. 1 to identify and quantify the 10 WIPP-tracked radionuclides for the

lead-lined drums.

# 7 

# (7) The total measurement uncertainty of a ssays performed on HENC No. 1 for lead-lined

assays has been determined and adequately documented.

As discussed above, addition of the lead-lined drums allows for the following 55-gallon drum

measurement configurations for HENC No. 1:

 Loose S5000 debris waste, no lead liner.

 Thirty-five 1-gallon cans packed in five layers of seven cans each, no lead liner.

 Thirty-five 1-gallons cans packed in five layers with a lead liner in the 55-gallon drum.

 Thirty 1-gallon cans packed in five layers of six cans each with a hollow core in the

center of the 55-gallon drum to keep all the 1-gallon cans against the inside wall of the

drum.

LANL-CCP considered the total measurement uncertainty (TMU) for each configuration, as

documented in CI-MCS-HENC TMU-101, Re vision 3, Addendum 1. All measurement

configurations are expected to be very consis tent in the overall matrix type. MCS-HENC TMU101, Revision 3, Addendum 1, Table 6, provides a summary of representative estimated

uncertainties among the three configurations. Th e values are close, and LANL-CCP chose to

apply the uncertainty based on the 30 1-gall on can configuration, representing the maximum

TMU value. There are no technical concerns re garding the TMU determination for lead-lined

assays on HENC No. 1.

(8) The lower limit of detection, including th e minimum detectable c oncentration, had been

determined and adequately documented.

To determine the minimum detectable activit ies (MDAs) for seven of the 10 WIPP-tracked

radionuclides that are measureable by gamma, me asurements were performed on a lead-lined

empty drum and a lead-lined drum filled with concrete. Th e NDA 2000 software calculated the

MDAs from these measurements, and minimum detectable concentrations (MDCs) for the

gamma modes were determined using the matrix weight using 1,800-second counting times. It is

important to note that MDAs are variable a nd depend on background count times and count rate

and matrix type. The empty drum MDC analysis shows that the system would not be able to

distinguish between TRU and non-TRU wastes at th e 100-nanocurie per gram (nCi/g) level, due

in large part to the low net weight of the c ontainer. However, the MDC for the lead-lined

concrete matrix shows that the system could distinguish between TRU and non-TRU waste at the

100 nCi/g level.

# 8 

# (9) EPA replicate testing of HENC No. 1 was performed, eval uated and determined to be

adequate.

The purpose of the replicate testing performed as pa rt of this evaluation is to provide EPA with

an independent means to verify that HENC No. 1 can provide consistent, reproducible results for

the determination of the quantity of 10 WIPP-tracked radionuclides ( 241 

# Am, 137 

# Cs, 238 

# Pu, 239 

# Pu,

240 

# Pu, 242 

# Pu, 90 

# Sr, 233 

# U, 234 

# U and 238 

# U) and the TRU alpha concentration. This is normally

accomplished by requesting that the site reassay dr ums that were previously characterized on the

same system or instrument in order to demonstrate the following:

 The instrument produces results consistent with the reported TMU by comparing the

sample standard deviation for a number of replicate measurements taken over several

hours or days to the reported TMU.

 The instrument provides reproducible results over longer periods of time, such as weeks

or months, by comparing the results of the replicate measurement( s) to the original

reported values.

EPA requested that LANL-CCP reassay three lead -lined drums that EPA randomly selected from

a list of nine containers previ ously assayed on HENC No. 1. Each of the selected drums, Nos.

54241, 54259 and 54262, had a valid prior assay on HENC No. 1.

Replicate measurements for all three containers on HENC No.1 passed both statistical tests.

There are no technical concerns regarding the ability of HENC No. 1 to provide consistent,

reproducible results for the determination of the quantity of 10 WIPP- tracked radionuclides.

(10) HENC No.1 had successfully participated in the CBFO-sponsore d Nondestructive Assay

Performance Demonstration Program.

HENC No. 1 successfully partic ipated in Cycle 18A of the CBFO NDA PDP, and LANL-CCP

personnel were in the process of completing the analyses for Cycle 19A. There were no concerns

regarding participation of HENC No. 1in the CBFO-sponsored NDA PDP.

6.2 Super High Efficiency Neutron Counter

(1) The design and operational histor y of the SuperHENC were assessed.

The SuperHENC is located at TA-54, on Pad 10 in Area G. EPA confirmed that it has not been

relocated since EPA’s initial approval in 2011. The SuperHENC is a multicomponent gamma

spectrometry and passive neutron NDA system to assay WIPP-bound CH TRU waste in SWBs.

The design and location of this in strument are described in detail in previous EPA reports (see

section 1.0). EPA determined that these aspect s were unaffected by this T1change. The assay

configurations for the SuperHENC are as follows:

 SWBs containing four 55-gallon drums of debris waste.

 SWBs containing direct-l oaded debris waste.

# 9 

# The majority of the activity of the higher densit y wastes that required this T1 change is

attributable to 241 

# Am; therefore, the passive neutron modality of the system was not changed.

This T1 change affected only the two SuperHEN C gamma detectors, whos e density ranges were

extended to 2.5 g/cc. The two SuperHENC gamm a detectors use composite tin-copper filters.

The detectors were physically removed from the system and sent to the Canberra factory in

Meriden, CT, where they were characterized for use with the ISOCS software. This allows a

variety of adjustments to the detectors to a ddress changes in measurement geometry, matrix

density, source-to-detector dist ance and so forth, based on modeling. There are no technical

concerns regarding the design and oper ational history of the SuperHENC.

(2) The qualifications and training for NDA pe rsonnel were evaluated and were found to be

adequate and appropriately documented.

EPA staff evaluated the CCP-LANL LOQI da ted June 15, 2012, 2:39 p.m., for all SuperHENC

personnel. The training was current for all Oper ators, Independent Technical Reviewers and

Expert Analysts for the SuperHENC. There were no concerns rega rding the training and

qualifications of SuperHENC personnel.

(3) Changes to the gamma efficiency calibrati on to accommodate the higher density assays

were evaluated and found to be technically adequate and appropriately documented.

The SuperHENC gamma detectors have separa te calibrations for energy, resolution and

reference peak (pulser). The energy, resolution and reference peak calibrations had been

performed previously and approved by EPA. The e fficiency calibrations performed initially in

2011 were modified in 2012 by incorporating the re sults of ISOCS modeling of the detectors at

higher densities. This produced the calib ration curve shown in LANL-SHENC3-NDA-1004,

Figure 3, which is a composite of measured da ta from 2011 and 2012 ISOCS data. This extends

the upper density limit to 2.5 g/cc.

The initial SuperHENC efficiency calibra tion used mixed gamma sources containing 241 

# Am and

152 

# Eu in different SWBs containing each of th e following five matrices: (1) empty (0.0 g/cc),

(2) cardboard (0.152 g/cc), (3 ) cardboard/plywood (0.297 g/cc), (4) cardboard/high density

poly/plywood (0.58 g/cc) and (5) plywood/low de nsity poly (0.788 g/cc). These produced the

initial upper density limit of 1.0 g/cc, which was extrapolated using ISOCS modeling, as

described above, to derive an upper limit of approximately 2.5 g/cc. There were no concerns

regarding the technical adequacy of the lead-lin ed efficiency calibration for the SuperHENC.

(4) The higher density calibration was confirme d using independent weapons grade and heat

source plutonium sources.

The gamma efficiency calibration was confirme d by measuring WG or HS Pu sources in a

standard zero-matrix SWB. Mass loadi ngs for WG Pu were 0.1316 g, 0.6114 g, 30.0 g, 114.8 g,

192.7 g and 272.7 g. HS Pu mass loadings were 7 .0 g and 17.07 g and both were decay corrected

to March 2011. Each mass loading was measured six times. All gamma WG Pu and HS Pu mass

loading measurements passed the criteria for accuracy (±30%) and precision (<14% RSD).

# 10 

# Based on this determination, there were no concer ns regarding the techni cal adequacy of the

lead-lined efficiency calibration confirmation for the SuperHENC.

(5) The high-density gamma efficiency calibra tion of the SuperHENC has the ability to

identify and quantify the 10 WIPP-tracked radionuclides.

The high-density gamma efficiency calibration of the SuperHENC di d not significantly affect the

system’s ability to identify and quantify th e 10 WIPP-tracked radionuc lides. EPA may revisit

this once a larger number of high-density drum s have been assayed on the SuperHENC. There

are no concerns regarding the ability of the S uperHENC to identify and quantify the 10 WIPPtracked radionuclides for the lead-lined drums.

(6) The total measurement uncertainty of assays of high-density contai ners performed on the

SuperHENC has been determined and appropriately documented.

The determination of TMU for the SuperH ENC is documented in CI-SHENC-TMU-102,

Revision 3, September 19, 2011. The gamma evaluation includes the propagation of both random

and systematic uncertainties. Ra ndom uncertainties are derived fr om counting statistics and are

calculated by the analysis software. Systematic uncertainties include those related to source

distribution effects and matrix non-homogeneities. It is assume d that individual uncertainty

components are statistically independent, allowing them to be added in quadrature. The primary

sources of uncertainty in the gamma analysis incl ude counting statistics, in terferences from other

radionuclides present, matrix non-homogeneity, isotopic measurement uncertainty background

fluctuations, calibration source unc ertainties, source distribution within the matrix, and selfabsorption. These are discussed in detail in CI-SHENC-TMU-102, Section 4. There are no

technical concerns regarding the determinati on and documentation of TMU for the LANL-CCP

SuperHENC.

(7) The lower limit of detection, including the minimum detectable concentration, had been

determined and appropriately documented.

To determine the MDAs for the 10 WIPP-tracked radionuclides, sets of three replicate

measurements were performed on one surrogate matrix SWB without radioactive sources. NDA

2000 software calculated the MDAs from these m easurements, and the MDAs were then used to

calculate the MDCs based on the matrix’s net we ight; in this case, the matrix was plywood and

cardboard. MDCs calculated in this way are shown in LANL-SHENC3-NDA-1003, Revision 4,

Table 7a. Only measured values that exceeded the reported lower limit of detection for a

measurement will be reported and used in calculations of derived quantities, such as total TRU

alpha activity and TRU al pha activity concentration. None of these aspects are affected by the

higher density assays. There are no technical co ncerns regarding the t echnical derivation and

application of lower limits of detection for higher density assays on the SuperHENC.

# 11 

# (8) EPA replicate testing of the SuperHEN C was performed, evaluated and found to be

adequate.

The purpose of the replicate testing performed as pa rt of this evaluation is to provide EPA with

an independent means to verify that the SuperH ENC can provide consiste nt, reproducible results

for the determination of the quantity of 10 WIPP-tracked radionuclides ( 241 

# Am, 137 

# Cs, 238 

# Pu,

239 

# Pu, 240 

# Pu, 242 

# Pu, 90 

# Sr, 233 

# U, 234 

# U and 238 

# U) and the TRU alpha concen tration. This is normally

accomplished by requesting that the site reassay dr ums that were previously characterized on the

same system or instrument in order to demonstrate the following:

 The instrument produces results consistentwith the reported TMU by comparing the

sample standard deviation for a number of replicate measurements taken over several

hours or days to the reported TMU.

 The instrument provides reproducible results over longer periods of time, such as weeks

or months, by comparing the results of th e replicate measurements to the original

reported values.

EPA requested that LANL-CCP reassay three cont ainers that EPA randomly selected from a list

of nine containers previously assayed on the S uperHENC. Each container had a valid prior assay

on the SuperHENC.

The t-test on SWB No. SB10069 (see Attachment D) resulted in a significant flag for 238 

# Pu and a

highly significant flag for neptunium-237 ( 237 

# Np), both a result of the difference between the

original measurement value and the average of the five replicate measurements. This was caused

by a relatively low activity of th e nuclide in the box. Precision among the replicates for this

measurement was still good. 237 

# Np is not a WIPP-tracked radi onuclide; the differences among

the values in absolute terms are small; and the decay of large concentrations of 241 

# Am can

produce variability in the 237 

# Np content as were observed here. Therefore, the 237 

# Np flags are of

minimal concern.

The t- test on SWB Container No. SB 10084 (see Attachment D) resulted in significant flags for

238 

# Pu, 240 

# Pu and 242 

# Pu, as a result of the difference between the original measurement values and

the averages of the five replicate measurements. In each instance the original measurement and

sample averages were close, yet the RSD pe rcents of the sample s were tight (<3.25%).

The t- test on SWB Container No. SB10102 (see Attachment D) resulted in a significant flag for

239 

# Pu as a result of the difference between the orig inal measurement value and the average of the

five replicate measurements. Precision among the replicates for this measurement was still good.

There are no technical concerns regarding the ability of HENC No. 1 to provide consistent,

reproducible results for the determination of the quantity of 10 WIPP- tracked radionuclides.

# 12 

# (6) The SuperHENC had successfully particip ated in the CBFO-sponsored Nondestructive

Assay Performance Demonstration Program.

Successful participation in Primary Box Cycle B11A of the NDA PDP, dated February 2012, is

documented in the CBFO scoring report for this cycle. There were no concerns regarding

participation of SuperHENC in the CBFO-sponsored NDA PDP.

7.0 SUMMARY OF TIER 1 EVALUATION

Findings and Concerns

The EPA inspection team did not identify any findi ngs or concerns relate d to HENC No.1 or the

SuperHENC during this T1 evaluation.

Tiering Changes

Based on the results of this T1 evaluation, EPA has not revised the T1 and T2 designations

assigned during the LANL-CCP baseline approval. Upon approval, the lead-lined operational

mode of HENC No. 1 and the new density ra nge for the SuperHENC will be added to the

LANL-CCP tiering summary.

Approval

Based on the results of this T1 evaluation, EPA approves the expansion of the calibration range

of HENC No. 1 to accommodate lead-lined drums and the new density range of the SuperHENC,

consistent with the limitations described in this report.

8.0 CONCLUSION

Based on this evaluation, EPA determines and approves that the calibration changes for both

instruments, HENC No. 2 and SuperHENC, are adequate to assay contact-handled (CH)

transuranic (TRU) wastes in the instrument-speci fic configurations detailed in the LANL-CCP

calibration reports. Changes to the approved components of bot h NDA systems must follow the

tiering requirements described in the baseline in spection report issued for the LANL-CCP CH

program (Docket No. A-98-49, II-A4-88, June 2007).

# A-1 

# ATTACHMENT A

SUMMARY OF LANL-CCP CO NTACT-HANDLED APPROVALS

Approved Activity EPA Inspection Number, Approval Dates Docket Number

LANL-CCP CH Baseline Approval LA NL-CCP-05.06-8 — June 21, 2007 A-98-49, II-A4-88

T1 Change – Extension of range for the High

Efficiency Neutron Counter No. 2 October 28, 2007 A-98-49; II-A4-91

T1 Change – Extension of range for the High

Efficiency Neutron Counter No. 1 December 7, 2007 A-98-49, II-A4-95

T1 Change – Assay of lead-lined drums on

the High Efficiency Neutron Counter No. 2 November 10, 2010 A-98-49, II-A4-139

T1Change – Addition of the SuperHENC October 28, 2011 A-98-49, II-A4-153

# B-1 

# ATTACHMENT B

DOCUMENTS REVIEWED FOR THIS EVALUATION

CCP-TP-059, CCP Operating the Super High Effi ciency Neutron Counter (SuperHENC) Using

NDA 2000, Revision 1, September 19, 2011

CCP-TP-063, CCP Operating the High-Efficien cy Neutron Counter Using NDA2000, Revision

13, April 11, 2011

CCP-TP-064, CCP Calibrating th e High Efficiency Neutron Counter and the Super High

Efficiency Neutron Counter Us ing NDA 2000, Revision 6, April 6, 2011

CCP-TP-103, CCP Data Reviewing, Validati ng, and Reporting Procedure for the High

Efficiency Neutron Counter and the Super Hi gh Efficiency Neutr on Counter Using NDA2000,

Revision 10, August 30, 2011

CCP- LANL List of Qualified Individua ls (LOQI), JUNE 15, 2012, July 27, 2011, and

August 11, 2011

CI-HENC-TMU-101, Total Measurement Uncertain ty for the HENC#1 with Integral Gamma

Spectrometer, June 19, 2012

CI-SHENC-TMU-102, Total Measurement Uncertain ty for the Los Alamos SuperHENC with

Gamma Spectroscopy, Revision 3, September 19, 2011

CSM-01-06, Idaho National Laboratory Central Char acterization Facility Standard Waste Box

Matrix Surrogate Inspection Summary Report, September 18, 2006

HENC No. 1 BDR Nos. 1LANDA1581, J une 8, 2012, 1LANDA1582, June 8, 2012, and

1LANDA1584, June 8, 2012

LANL-HENC2-TMU-101, Total Measurement Uncer tainty for the HENC #2 with Integral

Gamma Spectrometer, Revision 0, April 10, 2006

MCS-HENC#1-NDA-1005-Lead-Lined, Lead Lined Calibration Report for the HENC #1

Including Passive Neutron and Gamma Spectrometer, Revision 0, May l7, 2012

LANL-SHENC3-NDA-1004, Calibration Report for the SuperHENC at Los Alamos National

Laboratory Including Passive Neutron and Gamm a Spectrometer Calibration and Confirmation,

Revision 3, May 17, 2012, and Revision 4, June 15, 2012

Memorandum from Michael R. Brown, Carlsbad Fi eld Office, to Tom Morgan, Carlsbad Field

Office, Scoring Report – Supplemental Box Cycle B10C of the Nondestructive Assay

Performance Demonstration Program, September 12, 2011

# B-2 

# Memorandum from Michael R. Brown, Carlsbad Fi eld Office, to Distribution, Scoring Report –

Primary Box Cycle B11A of the Nondestructiv e Assay Performance Demonstration Program,

February 22, 2012

SuperHENC BDR Nos. 3LANDA0069, J une 13, 2012, and 3LANDA0070, June 14, 2012C-1ATTACHMENT C.1HENC No. 1 Replicate Testing Results for Container No. 54241 (Lead-Lined 55-Gallon Drum)Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 4.40E-01 1.61E-01 3.66E-01 4.12E-01 1.50E-01 3.64E-01 4.39E-01 1.60E-01 3.64E-01239Pu Activity (Ci) 4.86E+00 1.64E+00 3.37E-01 4.69E+00 1.58E+00 3.37E-01 4.99E+00 1.68E+00 3.37E-01240Pu Activity (Ci) 1.17E+00 4.29E-01 3.67E-01 1.13E+00 4.13E-01 3.65E-01 1.20E+00 4.40E-01 3.67E-01242Pu Activity (Ci) 9.11E-03 3.33E-03 3.66E-01 8.77E-03 3.21E-03 3.66E-01 9.34E-03 3.42E-03 3.66E-01241Am Activity (Ci) 1.86E+01 6.60E+00 3.55E-01 1.96E+01 6.96E+00 3.55E-01 1.89E+01 6.68E+00 3.53E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 9.44E+04 2.56E+04 2.71E-01 9.73E+04 2.69E+04 2.76E-01 9.59E+04 2.59E+04 2.70E-01Instrument: HENC1Container: 54241Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 4.26E-01 1.56E-01 3.66E-01 4.28E-01 1.56E-01 3.65E-01 4.09E-01 1.50E-01 3.67E-01239Pu Activity (Ci) 4.84E+00 1.63E+00 3.37E-01 4.87E+00 1.64E+00 3.37E-01 4.66E+00 1.57E+00 3.37E-01240Pu Activity (Ci) 1.17E+00 4.27E-01 3.65E-01 1.17E+00 4.29E-01 3.67E-01 1.12E+00 4.11E-01 3.67E-01242Pu Activity (Ci) 9.07E-03 3.32E-03 3.66E-01 9.12E-03 3.33E-03 3.65E-01 8.72E-03 3.19E-03 3.66E-01241Am Activity (Ci) 1.91E+01 6.77E+00 3.55E-01 2.02E+01 7.15E+00 3.54E-01 1.98E+01 7.00E+00 3.54E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 9.61E+04 2.62E+04 2.73E-01 1.00E+05 2.76E+04 2.76E-01 9.77E+04 2.70E+04 2.76E-01C-2Instrument: HENC1Container: 54241Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A234U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 4.26E-01 1.56E-01 3.66E-01 4.26E-01 1.46E-02 3.43E-02 3.51E-02 1.00E+00 2.50E-02 9.81E-01239Pu Activity (Ci) 4.84E+00 1.63E+00 3.37E-01 4.81E+00 1.37E-01 2.85E-02 2.83E-02 1.00E+00 1.73E-01 8.71E-01240Pu Activity (Ci) 1.17E+00 4.27E-01 3.65E-01 1.16E+00 3.27E-02 2.82E-02 2.35E-02 1.00E+00 3.35E-01 7.55E-01242Pu Activity (Ci) 9.07E-03 3.32E-03 3.66E-01 9.01E-03 2.61E-04 2.90E-02 2.47E-02 1.00E+00 2.03E-01 8.49E-01241Am Activity (Ci) 1.91E+01 6.77E+00 3.55E-01 1.94E+01 6.57E-01 3.38E-02 3.77E-02 1.00E+00 -4.44E-01 6.80E-0190Sr Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A137Cs Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/ATRU Alpha Conc. (nCi/g) 9.61E+04 2.62E+04 2.73E-01 9.71E+04 2.09E+03 2.16E-02 2.55E-02 1.00E+00 -4.14E-01 7.00E-01Quantity of Interest2Testt-Test233U Activity (Ci) Not Applicable Not Applicable234U Activity (Ci) Not Applicable Not Applicable238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not Significant Not Significant239Pu Activity (Ci)Not Significant Not Significant240Pu Activity (Ci)Not Significant Not Significant242Pu Activity (Ci)Not Significant Not Significant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci) Not Applicable Not Applicable137Cs Activity (Ci) Not Applicable Not ApplicableTRU Alpha Conc. (nCi/g)Not Significant Not SignificantC-3ATTACHMENT C.2HENC No. 1 Replicate Testing Results for Container No. 54259 (Lead-Lined 55-Gallon Drum)Instrument: HENC1Container: 54259Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 1.36E-01 7.19E-02 5.29E-01 1.34E-01 6.95E-02 5.19E-01 1.36E-01 7.13E-02 5.24E-01239Pu Activity (Ci) 5.02E+00 2.58E+00 5.14E-01 4.97E+00 2.49E+00 5.01E-01 5.04E+00 2.55E+00 5.06E-01240Pu Activity (Ci) 1.17E+00 6.24E-01 5.33E-01 1.16E+00 6.04E-01 5.21E-01 1.18E+00 6.19E-01 5.25E-01242Pu Activity (Ci) 6.76E-05 3.60E-05 5.33E-01 6.68E-05 3.48E-05 5.21E-01 6.78E-05 3.57E-05 5.27E-01241Am Activity (Ci) 5.73E+00 2.01E+00 3.51E-01 6.00E+00 2.09E+00 3.48E-01 5.93E+00 2.07E+00 3.49E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 4.20E+04 1.16E+04 2.76E-01 4.27E+04 1.15E+04 2.69E-01 4.28E+04 1.16E+04 2.71E-01Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 1.34E-01 7.12E-02 5.31E-01 1.33E-01 7.07E-02 5.32E-01 1.40E-01 7.54E-02 5.39E-01239Pu Activity (Ci) 4.94E+00 2.55E+00 5.16E-01 4.92E+00 2.53E+00 5.14E-01 5.18E+00 2.71E+00 5.23E-01240Pu Activity (Ci) 1.16E+00 6.18E-01 5.33E-01 1.15E+00 6.14E-01 5.34E-01 1.21E+00 6.55E-01 5.41E-01242Pu Activity (Ci) 6.65E-05 3.56E-05 5.35E-01 6.62E-05 3.54E-05 5.35E-01 6.97E-05 3.77E-05 5.41E-01241Am Activity (Ci) 5.75E+00 2.01E+00 3.50E-01 6.15E+00 2.15E+00 3.50E-01 5.78E+00 2.02E+00 3.49E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 4.17E+04 1.15E+04 2.76E-01 4.30E+04 1.18E+04 2.74E-01 4.29E+04 1.20E+04 2.80E-01C-4Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A234U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 1.36E-01 7.19E-02 5.29E-01 1.35E-01 2.79E-03 2.06E-02 6.04E-03 1.00E+00 1.96E-01 8.54E-01239Pu Activity (Ci) 5.02E+00 2.58E+00 5.14E-01 5.01E+00 1.05E-01 2.10E-02 6.67E-03 1.00E+00 8.66E-02 9.35E-01240Pu Activity (Ci) 1.17E+00 6.24E-01 5.33E-01 1.17E+00 2.39E-02 2.04E-02 5.86E-03 1.00E+00 -7.65E-02 9.43E-01242Pu Activity (Ci) 6.76E-05 3.60E-05 5.33E-01 6.74E-05 1.42E-06 2.11E-02 6.22E-03 1.00E+00 1.29E-01 9.04E-01241Am Activity (Ci) 5.73E+00 2.01E+00 3.51E-01 5.92E+00 1.64E-01 2.77E-02 2.67E-02 1.00E+00 -1.07E+00 3.46E-0190Sr Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A137Cs Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/ATRU Alpha Conc. (nCi/g) 4.20E+04 1.16E+04 2.76E-01 4.26E+04 5.26E+02 1.23E-02 8.23E-03 1.00E+00 -1.08E+00 3.43E-01Quantity of Interest2Testt Test233U Activity (Ci) Not Applicable Not Applicable234U Activity (Ci) Not Applicable Not Applicable238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not Significant Not Significant239Pu Activity (Ci)Not Significant Not Significant240Pu Activity (Ci)Not Significant Not Significant242Pu Activity (Ci)Not Significant Not Significant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci) Not Applicable Not Applicable137Cs Activity (Ci) Not Applicable Not ApplicableTRU Alpha Conc. (nCi/g)Not Significant Not SignificantC-5ATTACHMENT C.3HENC No. 1 Replicate Testing Results for Container No. 5462 (Lead-Lined 55-Gallon Drum)Instrument: HENC1Container: 54262Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 2.10E-01 1.02E-01 4.86E-01 2.00E-01 9.55E-02 4.78E-01 2.09E-01 9.94E-02 4.76E-01239Pu Activity (Ci) 7.77E+00 3.64E+00 4.68E-01 7.38E+00 3.40E+00 4.61E-01 7.71E+00 3.54E+00 4.59E-01240Pu Activity (Ci) 1.82E+00 8.89E-01 4.88E-01 1.72E+00 8.31E-01 4.83E-01 1.80E+00 8.65E-01 4.81E-01242Pu Activity (Ci) 1.05E-04 5.12E-05 4.88E-01 9.93E-05 4.79E-05 4.82E-01 1.04E-04 4.98E-05 4.79E-01241Am Activity (Ci) 8.55E+00 2.87E+00 3.36E-01 8.50E+00 2.86E+00 3.36E-01 8.52E+00 2.86E+00 3.36E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 6.77E+04 1.74E+04 2.57E-01 6.57E+04 1.67E+04 2.54E-01 6.73E+04 1.71E+04 2.54E-01Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 2.14E-01 1.04E-01 4.86E-01 2.12E-01 1.02E-01 4.81E-01 2.10E-01 1.03E-01 4.90E-01239Pu Activity (Ci) 7.91E+00 3.69E+00 4.66E-01 7.82E+00 3.64E+00 4.65E-01 7.75E+00 3.67E+00 4.74E-01240Pu Activity (Ci) 1.85E+00 9.02E-01 4.88E-01 1.83E+00 8.88E-01 4.85E-01 1.81E+00 8.95E-01 4.94E-01242Pu Activity (Ci) 1.06E-04 5.20E-05 4.91E-01 1.05E-04 5.12E-05 4.88E-01 1.04E-04 5.16E-05 4.96E-01241Am Activity (Ci) 8.91E+00 3.00E+00 3.37E-01 8.85E+00 2.97E+00 3.36E-01 8.46E+00 2.84E+00 3.36E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 6.97E+04 1.79E+04 2.57E-01 6.90E+04 1.76E+04 2.55E-01 6.73E+04 1.75E+04 2.60E-01C-6Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A234U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 2.10E-01 1.02E-01 4.86E-01 2.09E-01 5.39E-03 2.58E-02 1.11E-02 1.00E+00 1.70E-01 8.74E-01239Pu Activity (Ci) 7.77E+00 3.64E+00 4.68E-01 7.71E+00 2.02E-01 2.61E-02 1.23E-02 1.00E+00 2.54E-01 8.12E-01240Pu Activity (Ci) 1.82E+00 8.89E-01 4.88E-01 1.80E+00 4.97E-02 2.76E-02 1.25E-02 1.00E+00 3.31E-01 7.58E-01242Pu Activity (Ci) 1.05E-04 5.12E-05 4.88E-01 1.04E-04 2.57E-06 2.48E-02 1.01E-02 1.00E+00 4.75E-01 6.59E-01241Am Activity (Ci) 8.55E+00 2.87E+00 3.36E-01 8.65E+00 2.14E-01 2.47E-02 2.22E-02 1.00E+00 -4.18E-01 6.97E-0190Sr Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A137Cs Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/ATRU Alpha Conc. (nCi/g) 6.77E+04 1.74E+04 2.57E-01 6.78E+04 1.58E+03 2.33E-02 3.29E-02 1.00E+00 -5.79E-02 9.57E-01Quantity of Interest2Testt Test233U Activity (Ci) Not Applicable Not Applicable234U Activity (Ci) Not Applicable Not Applicable238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not Significant Not Significant239Pu Activity (Ci)Not Significant Not Significant240Pu Activity (Ci)Not Significant Not Significant242Pu Activity (Ci)Not Significant Not Significant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci) Not Applicable Not Applicable137Cs Activity (Ci) Not Applicable Not ApplicableTRU Alpha Conc. (nCi/g)Not Significant Not SignificantD-1ATTACHMENT D.1SuperHENC Replicate Testing Results for Container No. SB10084Instrument: SuperHENCContainer: SB10084Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A 8.05E-03 1.63E-03 2.02E-01 N/A234U Activity (Ci) 1.27E-04 2.05E-05 1.61E-01 1.09E-04 1.86E-05 1.71E-01 N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 6.11E-01 2.09E-01 3.42E-01 5.10E-01 1.76E-01 3.45E-01 5.05E-01 1.74E-01 3.45E-01239Pu Activity (Ci) 7.39E+00 2.52E+00 3.41E-01 7.60E+00 2.59E+00 3.41E-01 7.45E+00 2.54E+00 3.41E-01240Pu Activity (Ci) 1.76E+00 5.99E-01 3.41E-01 1.96E+00 6.68E-01 3.41E-01 1.93E+00 6.58E-01 3.41E-01242Pu Activity (Ci) 2.33E-04 8.27E-05 3.55E-01 2.52E-04 8.93E-05 3.54E-01 2.50E-04 8.90E-05 3.56E-01241Am Activity (Ci) 4.58E+00 9.23E-01 2.02E-01 4.71E+00 6.18E-01 1.31E-01 5.28E+00 7.03E-01 1.33E-0190Sr Activity (Ci) N/A 9.53E-06 1.38E-06 1.45E-01 3.58E-06 5.64E-07 1.58E-01137Cs Activity (Ci) N/A 9.53E-06 1.38E-06 1.45E-01 3.58E-06 5.64E-07 1.58E-01TRU Alpha Conc. (nCi/g) 1.37E+04 2.62E+03 1.91E-01 1.41E+04 2.62E+03 1.86E-01 1.44E+04 2.59E+03 1.80E-01Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) 9.13E-03 1.71E-03 1.87E-01 N/A N/A234U Activity (Ci) 1.99E-04 2.92E-05 1.47E-01 N/A N/A238U Activity (Ci) 2.48E-05 4.29E-06 1.73E-01 N/A N/A238Pu Activity (Ci) 4.49E-01 1.56E-01 3.47E-01 4.58E-01 1.57E-01 3.43E-01 4.58E-01 1.60E-01 3.49E-01239Pu Activity (Ci) 7.17E+00 2.44E+00 3.41E-01 7.50E+00 2.52E+00 3.36E-01 7.55E+00 2.58E+00 3.42E-01240Pu Activity (Ci) 1.88E+00 6.41E-01 3.41E-01 1.90E+00 6.41E-01 3.38E-01 1.97E+00 6.74E-01 3.42E-01242Pu Activity (Ci) 2.42E-04 8.58E-05 3.55E-01 2.48E-04 8.71E-05 3.51E-01 2.54E-04 9.05E-05 3.56E-01241Am Activity (Ci) 4.45E+00 5.85E-01 1.32E-01 5.04E+00 6.70E-01 1.33E-01 4.54E+00 6.08E-01 1.34E-0190Sr Activity (Ci) 9.52E-06 1.37E-06 1.44E-01 3.02E-06 5.06E-07 1.68E-01 2.45E-06 4.33E-07 1.77E-01137Cs Activity (Ci) 9.52E-06 1.37E-06 1.44E-01 3.02E-06 5.06E-07 1.68E-01 2.45E-06 4.33E-07 1.77E-01TRU Alpha Conc. (nCi/g) 1.33E+04 2.47E+03 1.86E-01 1.42E+04 2.56E+03 1.80E-01 1.38E+04 2.61E+03 1.89E-01D-2Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A 8.59E-03 7.64E-04 8.89E-02 #VALUE! #VALUE! -9.18E+00 6.90E-02234U Activity (Ci) 1.27E-04 2.05E-05 1.61E-01 1.54E-04 6.36E-05 4.13E-01 9.64E+00 1.91E-03 -3.46E-01 7.88E-01238U Activity (Ci) N/A 2.48E-05 N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 6.11E-01 2.09E-01 3.42E-01 4.76E-01 2.90E-02 6.10E-02 7.75E-02 9.99E-01 4.24E+00 1.32E-02239Pu Activity (Ci) 7.39E+00 2.52E+00 3.41E-01 7.45E+00 1.68E-01 2.26E-02 1.78E-02 1.00E+00 -3.47E-01 7.46E-01240Pu Activity (Ci) 1.76E+00 5.99E-01 3.41E-01 1.93E+00 3.83E-02 1.99E-02 1.64E-02 1.00E+00 -4.00E+00 1.61E-02242Pu Activity (Ci) 2.33E-04 8.27E-05 3.55E-01 2.49E-04 4.60E-06 1.85E-02 1.24E-02 1.00E+00 -3.21E+00 3.25E-02241Am Activity (Ci) 4.58E+00 9.23E-01 2.02E-01 4.80E+00 3.49E-01 7.26E-02 5.71E-01 9.66E-01 -5.87E-01 5.89E-0190Sr Activity (Ci) N/A 5.62E-06 3.59E-06 6.38E-01 #VALUE! #VALUE! -1.43E+00 2.26E-01137Cs Activity (Ci) N/A 5.62E-06 3.59E-06 6.38E-01 #VALUE! #VALUE! -1.43E+00 2.26E-01TRU Alpha Conc. (nCi/g) 1.37E+04 2.62E+03 1.91E-01 1.40E+04 4.28E+02 3.06E-02 1.07E-01 9.99E-01 -5.55E-01 6.09E-01Quantity of Interest2Testt Test233U Activity (Ci) #VALUE!Not Significant234U Activity (Ci)Highly SignificantNot Significant238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not SignificantSignificant239Pu Activity (Ci)Not Significant Not Significant240Pu Activity (Ci)Not SignificantSignificant242Pu Activity (Ci)Not SignificantSignificant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci) #VALUE!Not Significant137Cs Activity (Ci) #VALUE!Not SignificantTRU Alpha Conc. (nCi/g)Not Significant Not SignificantD-3D-4ATTACHMENT D.2SuperHENC Replicate Testing Results for Container No. SB10069Instrument: SuperHENCContainer: SB10069Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) 1.41E-04 2.00E-05 1.42E-01 1.05E-04 1.57E-05 1.50E-01 1.12E-04 1.65E-05 1.47E-01238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 1.82E-01 6.41E-02 3.52E-01 2.31E-01 8.10E-02 3.51E-01 2.25E-01 7.88E-02 3.50E-01239Pu Activity (Ci) 2.03E+00 7.05E-01 3.48E-01 2.24E+00 7.76E-01 3.47E-01 2.26E+00 7.83E-01 3.47E-01240Pu Activity (Ci) 5.14E-01 1.79E-01 3.48E-01 5.90E-01 2.05E-01 3.47E-01 5.93E-01 2.06E-01 3.47E-01242Pu Activity (Ci) 7.93E-05 2.86E-05 3.61E-01 9.13E-05 3.30E-05 3.61E-01 9.00E-05 3.25E-05 3.61E-01241Am Activity (Ci) 1.69E+00 2.23E-01 1.32E-01 1.88E+00 3.78E-01 2.01E-01 1.84E+00 3.71E-01 2.02E-0190Sr Activity (Ci) 6.53E-06 8.97E-07 1.37E-01 N/A N/A137Cs Activity (Ci) 6.53E-06 8.97E-07 1.37E-01 N/A N/ATRU Alpha Conc. (nCi/g) 4.13E+03 7.13E+02 1.73E-01 4.61E+03 8.32E+02 1.81E-01 4.59E+03 8.36E+02 1.82E-01Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) 1.53E-04 2.17E-05 1.42E-01 1.55E-04 2.20E-05 1.42E-01 1.42E-04 2.03E-05 1.43E-01238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 2.18E-01 7.65E-02 3.51E-01 2.41E-01 8.42E-02 3.49E-01 2.11E-01 7.37E-02 3.49E-01239Pu Activity (Ci) 2.18E+00 7.56E-01 3.47E-01 2.17E+00 7.53E-01 3.47E-01 1.97E+00 6.83E-01 3.47E-01240Pu Activity (Ci) 5.62E-01 1.95E-01 3.47E-01 6.20E-01 2.15E-01 3.47E-01 5.35E-01 1.86E-01 3.47E-01242Pu Activity (Ci) 8.49E-05 3.07E-05 3.62E-01 9.54E-05 3.45E-05 3.62E-01 8.26E-05 2.98E-05 3.61E-01241Am Activity (Ci) 1.82E+00 2.40E-01 1.32E-01 1.76E+00 2.32E-01 1.32E-01 1.87E+00 2.46E-01 1.32E-0190Sr Activity (Ci) 6.12E-06 8.51E-07 1.39E-01 6.38E-06 8.82E-07 1.38E-01 6.27E-06 8.72E-07 1.39E-01137Cs Activity (Ci) 6.12E-06 8.51E-07 1.39E-01 6.38E-06 8.82E-07 1.38E-01 6.27E-06 8.72E-07 1.39E-01TRU Alpha Conc. (nCi/g) 4.47E+03 7.67E+02 1.72E-01 4.48E+03 7.67E+02 1.71E-01 4.28E+03 7.03E+02 1.64E-01D-5Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A234U Activity (Ci) 1.41E-04 2.00E-05 1.42E-01 1.33E-04 2.34E-05 1.75E-01 5.47E+00 2.42E-01 2.97E-01 7.82E-01238U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 1.82E-01 6.41E-02 3.52E-01 2.25E-01 1.16E-02 5.14E-02 1.31E-01 9.98E-01 -3.40E+00 2.72E-02239Pu Activity (Ci) 2.03E+00 7.05E-01 3.48E-01 2.16E+00 1.15E-01 5.32E-02 1.06E-01 9.99E-01 -1.06E+00 3.47E-01240Pu Activity (Ci) 5.14E-01 1.79E-01 3.48E-01 5.80E-01 3.25E-02 5.60E-02 1.32E-01 9.98E-01 -1.86E+00 1.37E-01242Pu Activity (Ci) 7.93E-05 2.86E-05 3.61E-01 8.88E-05 5.12E-06 5.76E-02 1.28E-01 9.98E-01 -1.70E+00 1.64E-01241Am Activity (Ci) 1.69E+00 2.23E-01 1.32E-01 1.83E+00 4.77E-02 2.60E-02 1.83E-01 9.96E-01 -2.75E+00 5.12E-0290Sr Activity (Ci) 6.53E-06 8.97E-07 1.37E-01 6.26E-06 1.31E-07 2.09E-02 4.23E-02 9.79E-01 1.81E+00 2.11E-01137Cs Activity (Ci) 6.53E-06 8.97E-07 1.37E-01 6.26E-06 1.31E-07 2.09E-02 4.23E-02 9.79E-01 1.81E+00 2.11E-01TRU Alpha Conc. (nCi/g) 4.13E+03 7.13E+02 1.73E-01 4.49E+03 1.31E+02 2.93E-02 1.35E-01 9.98E-01 -2.48E+00 6.85E-02Quantity of Interest2Testt Test233U Activity (Ci) Not Applicable Not Applicable234U Activity (Ci)Not Significant Not Significant238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not SignificantSignificant239Pu Activity (Ci)Not Significant Not Significant240Pu Activity (Ci)Not Significant Not Significant242Pu Activity (Ci)Not Significant Not Significant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci)Not Significant Not Significant137Cs Activity (Ci)Not Significant Not SignificantTRU Alpha Conc. (nCi/g)Not Significant Not SignificantD-6ATTACHMENT D.3SuperHENC Replicate Testing Results for Container No. SB10102Instrument: SuperHENCContainer: SB10102Original MeasurementReplicate #1Replicate #2ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/A N/A N/A234U Activity (Ci) N/A N/A N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 3.47E-01 1.15E-01 3.30E-01 4.59E-01 1.52E-01 3.31E-01 3.64E-01 1.21E-01 3.33E-01239Pu Activity (Ci) 7.47E+00 2.39E+00 3.20E-01 7.34E+00 2.39E+00 3.25E-01 7.15E+00 2.30E+00 3.22E-01240Pu Activity (Ci) 1.86E+00 5.98E-01 3.22E-01 1.85E+00 6.03E-01 3.26E-01 1.78E+00 5.73E-01 3.22E-01242Pu Activity (Ci) 3.36E-04 1.09E-04 3.25E-01 3.88E-04 1.27E-04 3.28E-01 1.71E-04 5.55E-05 3.25E-01241Am Activity (Ci) 5.21E+00 6.98E-01 1.34E-01 5.67E+00 7.43E-01 1.31E-01 5.42E+00 7.35E-01 1.36E-0190Sr Activity (Ci) N/A N/A N/A137Cs Activity (Ci) N/A N/A N/ATRU Alpha Conc. (nCi/g) 1.47E+04 2.54E+03 1.73E-01 1.52E+04 2.55E+03 1.68E-01 1.46E+04 2.46E+03 1.69E-01Replicate #3Replicate #4Replicate #5ReportedAbsoluteRelativeReportedAbsoluteRelativeReportedAbsoluteRelativeQuantity of InterestValueUncertaintyUncertaintyValueUncertaintyUncertaintyValueUncertaintyUncertainty233U Activity (Ci) N/AN/A 6.80E-03 1.61E-03 2.37E-01234U Activity (Ci) 2.14E-04 3.09E-05 1.44E-01 1.47E-04 2.32E-05 1.58E-01 N/A238U Activity (Ci) N/A N/A N/A238Pu Activity (Ci) 3.78E-01 1.25E-01 3.30E-01 3.71E-01 1.23E-01 3.32E-01 3.89E-01 1.28E-01 3.30E-01239Pu Activity (Ci) 7.22E+00 2.31E+00 3.20E-01 7.28E+00 2.33E+00 3.20E-01 7.24E+00 2.32E+00 3.20E-01240Pu Activity (Ci) 1.81E+00 5.83E-01 3.22E-01 1.85E+00 5.96E-01 3.22E-01 1.91E+00 6.15E-01 3.22E-01242Pu Activity (Ci) 1.76E-04 5.72E-05 3.25E-01 1.76E-04 5.69E-05 3.24E-01 1.85E-04 6.01E-05 3.25E-01241Am Activity (Ci) 4.38E+00 5.76E-01 1.31E-01 4.41E+00 5.80E-01 1.32E-01 4.75E+00 6.47E-01 1.36E-0190Sr Activity (Ci) N/AN/A 1.31E-06 1.90E-07 1.45E-01137Cs Activity (Ci) N/AN/A 1.31E-06 1.90E-07 1.45E-01TRU Alpha Conc. (nCi/g) 1.37E+04 2.43E+03 1.78E-01 1.38E+04 2.46E+03 1.78E-01 1.41E+04 2.46E+03 1.75E-01D-7Original MeasurementSampleRelativeReportedAbsoluteRelativeSampleStandardStandardQuantity of InterestValueUncertaintyUncertaintyMeanDeviationDeviation2Pr(x<| 

# 2|)tPr(x<|t|)233U Activity (Ci) N/A 6.80E-03 N/A N/A N/A N/A N/A N/A234U Activity (Ci) N/A 1.81E-04 4.74E-05 2.62E-01 #VALUE! #VALUE! -3.11E+00 1.98E-01238U Activity (Ci) N/A N/A N/A N/A N/A N/A N/A N/A238Pu Activity (Ci) 3.47E-01 1.15E-01 3.30E-01 3.92E-01 3.85E-02 9.81E-02 4.51E-01 9.78E-01 -1.07E+00 3.44E-01239Pu Activity (Ci) 7.47E+00 2.39E+00 3.20E-01 7.25E+00 7.06E-02 9.74E-03 3.49E-03 1.00E+00 2.90E+00 4.42E-02240Pu Activity (Ci) 1.86E+00 5.98E-01 3.22E-01 1.84E+00 4.90E-02 2.66E-02 2.68E-02 1.00E+00 3.73E-01 7.28E-01242Pu Activity (Ci) 3.36E-04 1.09E-04 3.25E-01 2.19E-04 9.45E-05 4.31E-01 3.00E+00 5.59E-01 1.13E+00 3.22E-01241Am Activity (Ci) 5.21E+00 6.98E-01 1.34E-01 4.93E+00 5.90E-01 1.20E-01 2.86E+00 5.82E-01 4.39E-01 6.83E-0190Sr Activity (Ci) N/A 1.31E-06 N/A N/A N/A N/A N/A N/A137Cs Activity (Ci) N/A 1.31E-06 N/A N/A N/A N/A N/A N/ATRU Alpha Conc. (nCi/g) 1.47E+04 2.54E+03 1.73E-01 1.43E+04 6.22E+02 4.36E-02 2.40E-01 9.93E-01 6.16E-01 5.71E-01Quantity of Interest2Testt Test233U Activity (Ci) Not Applicable Not Applicable234U Activity (Ci) #VALUE!Not Significant238U Activity (Ci) Not Applicable Not Applicable238Pu Activity (Ci)Not Significant Not Significant239Pu Activity (Ci)Not SignificantSignificant240Pu Activity (Ci)Not Significant Not Significant242Pu Activity (Ci)Not Significant Not Significant241Am Activity (Ci)Not Significant Not Significant90Sr Activity (Ci) Not Applicable Not Applicable137Cs Activity (Ci) Not Applicable Not ApplicableTRU Alpha Conc. (nCi/g)Not Significant Not Significant