ML25119A297

Enclosure 18, Tsd 25-032, Revision 0, Radionuclides of Concern in Support of the Oyster Creek License Termination Plan, April 4, 2025 (Supersedes Technical Basis Document No. 24-01-12-2888 Revision 1, Dose Contribution from Insignificant Ra

ML25119A297
Person / Time
Site:	Oyster Creek
Issue date:	04/29/2025
From:	Holtec Decommissioning International, Radiation Safety & Control Services
To:	Office of Nuclear Reactor Regulation, Office of Nuclear Material Safety and Safeguards
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HDI-OC-25-017 TSD 25-032, Rev. 0
Download: ML25119A297 (1)

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RSCS Technical Support Document No.25-032 Rev 0 Radionuclides of Concern in Support of the Oyster Creek Station License Termination Plan Prepared by: ___________________________________________________

John P. Clements, CHP, Sr. Health Physicist Reviewed by: ___________________________________________________

Eric Darois, CHP, Executive Director Calculations Reviewed by: ________________________________________

Eric Darois, CHP, Executive Director Approved by: ___________________________________________________________

Christopher Messier, Sr. Dir. of Engineering & Strategic Development Radiation Safety & Control Services, Inc 93 Ledge Road Seabrook, NH 03874 1-800-525-8339 www.radsafety.com April 04, 2025 RSCS Radiation Safety & Control Services

Radionuclides of Concern in Support of the Oyster Creek Station License Termination Plan Table of Contents 1

Introduction............................................................................................................................. 7 2

Discussion................................................................................................................................ 7 2.1 Radionuclide Selection and the Initial Suite of Radionuclides....................................... 7 2.2 Characterization Samples............................................................................................... 8 2.3 Establishing Representative Populations and Mixtures............................................... 12 2.3.1 Population Evaluations......................................................................................... 12 2.3.2 Determination of Representative Populations..................................................... 13 2.4 Radionuclide Mixture and Insignificant Dose Contributors.......................................... 14 2.4.1 Radionuclide Mixture Fraction Determination..................................................... 15 2.4.2 Insignificant Contributors to Dose and Radionuclides of Concern....................... 33 2.4.3 Selection of Overall Nuclide Fraction and Determination of FSS ROCs................ 48 2.4.4 FSS ROC Mixture Fractions.................................................................................... 50 2.5 Surrogate Ratios............................................................................................................ 51 3

Conclusions............................................................................................................................ 65 4

References............................................................................................................................. 66 5

Attachments.......................................................................................................................... 67 5.1 Decay-Corrected Analytical Results for Concrete Samples, With Negative Values Reset to Zero 69 5.2 All Concrete Samples Population Mixture Fractions.................................................... 74 5.3 Derived Concentration Guideline Levels (DCGLs)......................................................... 86 RSCS TSD 25-032 Rev 0 Page 2 of 86

List of Tables Table 2 Initial Suite of Potential Radionuclides of Concern..................................................... 8 Table 2 Description of Characterization Survey Locations....................................................... 8 Table 2 Listing of Concrete Sample ID Numbers and Types................................................... 10 Table 2 Average Decay-Corrected MDCs from GEL Analysis Results of Concrete Samples for Each Radionuclide......................................................................................................................... 12 Table 2 Radionuclides With One or More Detections Above MDC By Location..................... 13 Table 2 Representative Population Areas.............................................................................. 13 Table 2 Sample Detections Above MDC by Population........................................................... 14 Table 2 RXB Concrete Radionuclide Activity Fractions, First Set of Radionuclides................ 18 Table 2 RXB Concrete Radionuclide Activity Fractions, Second Set of Radionuclides........... 19 Table 2 RXB Concrete Radionuclide Activity Fractions, Third Set of Radionuclides............. 20 Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, First Set of Radionuclides... 21 Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, Second Set of Radionuclides

....................................................................................................................................................... 22 Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, Third Set of Radionuclides. 23 Table 2 Radionuclide Activity Fractions for Reactor Building (RXB) Population Using Three Methods........................................................................................................................................ 24 Table 2 Remainder Concrete Radionuclide Activity Fractions, First Set of Radionuclides... 25 Table 2 Remainder Concrete Radionuclide Activity Fractions, Second Set of Radionuclides

....................................................................................................................................................... 26 Table 2 Remainder Concrete Radionuclide Activity Fractions, Third Set of Radionuclides. 27 Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, First Set of Radionuclides................................................................................................................................ 28 Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, Second Set of Radionuclides................................................................................................................................ 29 Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, Third Set of Radionuclides................................................................................................................................ 30 Table 2 Radionuclide Activity Fractions for Remainder Population Using Three Methods. 31 Table 2 Radionuclide Activity Fractions for All Samples Population Using Three Methods

....................................................................................................................................................... 32 Table 2 List of DCGLs Evaluated in this TSD........................................................................... 33 RSCS TSD 25-032 Rev 0 Page 3 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Concrete Industrial Use DCGL Scenario.................................................................... 34 Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Concrete Industrial Use DCGL Scenario.................................... 35 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Concrete Industrial Use DCGL Scenario.................................................................... 36 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Concrete Industrial Use DCGL Scenario................. 37 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Soil Industrial Use DCGL Scenario............................................................................. 38 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Soil Industrial Use DCGL Scenario.......................... 39 Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Buried Pipe Industrial Use DCGL Scenario................................................................ 40 Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Buried Pipe Industrial Use DCGL Scenario................................ 41 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Buried Pipe Industrial Use DCGL Scenario................................................................ 42 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Buried Pipe Industrial Use DCGL Scenario............. 43 Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Embedded Pipe Industrial Use DCGL Scenario......................................................... 44 Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Embedded Pipe Industrial Use DCGL Scenario......................... 45 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Embedded Pipe Industrial Use DCGL Scenario......................................................... 46 Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Embedded Pipe Industrial Use DCGL Scenario...... 47 Table 2 Final Radionuclide Mixture Fractions....................................................................... 48 Table 2 Summary of FSS ROCs Listed by Survey Area/Media............................................... 49 Table 2 Re-Normalized FSS ROC Mixture Fractions.............................................................. 50 Table 2 Gamma Re-Normalized FSS ROC Mixture Fractions................................................ 50 Table 2 Reactor Building (RXB) Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.................................................................................................... 52 RSCS TSD 25-032 Rev 0 Page 4 of 86

Table 2 Remainder Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.................................................................................................................... 53 Table 2 Reactor Building (RXB) Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.......................................................................... 54 Table 2 Remainder Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.................................................................................................................... 55 Table 2 Reactor Building (RXB) Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.......................................................................... 56 Table 2 Remainder Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC.................................................................................................... 57 Table 2 Reactor Building (RXB) Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities........................................................................................ 58 Table 2 Remainder Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities........................................................................................................ 59 Table 2 Reactor Building (RXB) Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities.............................................................. 60 Table 2 Remainder Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities........................................................................................................ 61 Table 2 Reactor Building (RXB) Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities.............................................................. 62 Table 2 Remainder Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities........................................................................................ 63 Table 2 Surrogate Ratios, HTD to Cs-137 Per RXB/Remainder Population, Based on Activities Above MDC.................................................................................................................... 64 Table 2 Surrogate Ratios, HTD to Cs-137 Per RXB/Remainder Population, Based on Positively Detected Activities........................................................................................................ 64 Table 5 Concrete Sample Analytical Results (pCi/g), First Set of Radionuclides.................... 68 Table 5 Concrete Sample Analytical Results (pCi/g), Second Set of Radionuclides............... 70 Table 5 Concrete Sample Analytical Results (pCi/g), Third Set of Radionuclides................... 72 Table 5 All Concrete Sample Activity Fractions, First Set of Radionuclides........................... 75 Table 5 All Concrete Sample Activity Fractions, Second Set of Radionuclides....................... 77 Table 5 All Concrete Sample Activity Fractions, Third Set of Radionuclides.......................... 79 Table 5 All Concrete Sample Activity Ratios to Cs-137, First Set of Radionuclides................ 81 RSCS TSD 25-032 Rev 0 Page 5 of 86

Table 5 All Concrete Sample Activity Ratios to Cs-137, Second Set of Radionuclides........... 83 Table 5 All Concrete Sample Activity Ratios to Cs-137, Third Set of Radionuclides............... 85 Table 5 Derived Concentration Guideline Levels Used for RDF Calculations........................ 86 List of Figures Figure 2 Below Grade Survey Areas.......................................................................................... 9 RSCS TSD 25-032 Rev 0 Page 6 of 86

1 Introduction An important part of assessing and developing characterization plans, Final Status Survey (FSS) plans and developing Derived Concentration Guideline Levels (DCGL) at Oyster Creek Station (OCS) is the identification of radionuclides that could result in a significant dose contribution at the time of license termination. This TSD develops a final FSS Radionuclides of Concern (ROC) list that will undergo detailed evaluation for FSS design and dose modeling in the OCS License Termination Plan (LTP).

2 Discussion A technical evaluation was previously performed by BHI Energy in Technical Basis Document No.

20-6002-1362, Radionuclide Selection for DCGL Development Oyster Creek Station Site Characterization Project to document an initial suite of ROCs for the decommissioning of OCS (BHI, 2022). A systematic approach was taken in TSD 20-6002-1362 to develop the initial suite of 21 potential ROCs specific to the OCS site. These potential ROCs were developed through the review of applicable nuclear industry guidance documents, relevant OCS-specific historical information, and available representative radionuclide sample data. The selection of the initial suite of radionuclides includes identifying the potential radionuclides as well as eliminating those radionuclides that would not be present due to decay or may be present but in insignificant concentrations and at a minimal contribution to dose. Those initial potential ROCs are evaluated in this TSD.

2.1 Radionuclide Selection and the Initial Suite of Radionuclides This TSD evaluates the results of a series of concrete samples that were analyzed for the 21 radionuclides in the initial suite and further refines the initial ROCs into a final set of FSS ROCs for use during FSS. Radionuclide mixture fractions were established for the initial ROCs, and the results were used to eliminate some radionuclides as insignificant contributors (IC) to dose.

Additionally, surrogate ratios were determined for the hard-to-detect ROCs. Further details on these evaluations and the development of the final FSS ROCs are provided in Sections 2.2 through 2.5 below.

The initial suite of radionuclides, as developed in BHI Technical Basis Document No. 20-6002-1362, are shown in Table 2-1 below, along with their respective half-lives. Nuclide pairs are shown for 4 of the initial suite radionuclides (Cm-243/244 and Pu-239/240) because the analytical laboratory only reports sample analyses for the respective pairs. The longer half-life of each pair is reported in these cases as it will be the most limiting for decay corrections.

RSCS TSD 25-032 Rev 0 Page 7 of 86

Table 2 Initial Suite of Potential Radionuclides of Concern Radionuclide Half-Life (years)a Am-241 4.33E+02 C-14 5.70E+03 Cm-243/244b 2.91E+01 Co-60 5.27E+00 Cs-137 3.01E+01 Eu-152 1.35E+01 Eu-154 8.60E+00 Fe-55 2.74E+00 H-3 1.23E+01 Mn-54 8.55E-01 Nb-94 2.03E+04 Ni-63 1.01E+02 Np-237 2.14E+06 Pu-238 8.77E+01 Pu-239/240b 2.41E+04 Pu-241 1.43E+01 Sb-125 2.76E+00 Sr-90 2.89E+01 Tc-99 2.11E+05 a Half-lives from NNDC NuDat 2.8 Chart of the Nuclides, https://www.nndc.bnl.gov/nudat3/chartNuc.jsp.

b Longer half-life of the two nuclides listed is cited for radionuclides reported in pairs.

2.2 Characterization Samples For the purpose of this TSD, a series of concrete samples were analyzed for the full initial suite of potential ROCs shown in Table 2-1. A total of 58 concrete samples were evaluated from 45 discrete sample locations - lists of the sampling locations are provided in Table 2-2 and Table 2-3, and a map of the general sampling survey areas is provided in Figure 2-1. Concrete samples were taken from various depths and locations (floors and walls) - these details are provided in Table 2-3. The entirety of the concrete sampling results are also listed in Attachment 5.1, Table 5-1 to Table 5-3.

Table 2 Description of Characterization Survey Locations Survey Unit Description Total Samples RCA-BSTK Base of Stack 3

RCA-NRWT New Radioactive Waste Pipe Tunnel 7

RCA-RXB Reactor Building 35 RCA-RXBT Reactor Building Ventilation Tunnel 3

RCA-TURB Turbine Building 3

RCA-TURT Turbine Building Ventilation Tunnel 7

58 RSCS TSD 25-032 Rev 0 Page 8 of 86

Figure 2 Below Grade Survey Areas RSCS TSD 25-032 Rev 0 Page 9 of 86

Table 2 Listing of Concrete Sample ID Numbers and Types Sample ID Sample Depth (inches)

Wall/Floor RCA-BSTK-CONC-001-0.0-B-QC 0.0 Floor RCA-BSTK-CONC-003-0.0-B-D-QC 0.0 Floor RCA-BSTK-CONC-004-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-002-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-002-0.5-B-QC 0.5 Floor RCA-NRWT-CONC-003-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-005-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-006-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-007-0.0-B-QC 0.0 Floor RCA-NRWT-CONC-007-0.5-B-QC 0.5 Floor RCA-RXB-CONC-002-0.0-B-QC 0.0 Floor RCA-RXB-CONC-003-0.0-B-QC 0.0 Floor RCA-RXB-CONC-004-0.0-B-D-QC 0.0 Wall RCA-RXB-CONC-009-0.0-B-QC 0.0 Floor RCA-RXB-CONC-011-0.0-B-QC 0.0 Wall RCA-RXB-CONC-012-0.0-B-D-QC 0.0 Floor RCA-RXB-CONC-012-1.0-B-D-QC 1.0 Floor RCA-RXB-CONC-014-0.0-B-QC 0.0 Floor RCA-RXB-CONC-014-0.5-B-QC 0.5 Floor RCA-RXB-CONC-019-0.0-B-QC 0.0 Floor RCA-RXB-CONC-020-0.0-B-QC 0.0 Floor RCA-RXB-CONC-020-0.5-B-QC 0.5 Floor RCA-RXB-CONC-023-0.0-B-QC 0.0 Floor RCA-RXB-CONC-023-0.5-B-QC 0.5 Floor RCA-RXB-CONC-024-0.0-B-QC 0.0 Floor RCA-RXB-CONC-024-0.5-B-QC 0.5 Floor RCA-RXB-CONC-025-0.0-B-QC 0.0 Floor RCA-RXB-CONC-026-0.0-B-D-QC 0.0 Floor RCA-RXB-CONC-027-0.0-B-QC 0.0 Floor RCA-RXB-CONC-028-0.0-B-QC 0.0 Floor RCA-RXB-CONC-029-0.0-B-QC 0.0 Floor RCA-RXB-CONC-030-0.0-B-QC 0.0 Floor RCA-RXB-CONC-030-0.5-B-QC 0.5 Floor RCA-RXB-CONC-032-0.0-B-QC 0.0 Floor RCA-RXB-CONC-034-0.0-B-QC 0.0 Floor RCA-RXB-CONC-035-0.0-B-QC 0.0 Floor RCA-RXB-CONC-035-0.5-B-QC 0.5 Floor RCA-RXB-CONC-036-0.0-B-QC 0.0 Floor RCA-RXB-CONC-037-0.0-B-QC 0.0 Wall RCA-RXB-CONC-038-0.0-B-QC 0.0 Floor RCA-RXB-CONC-040-0.0-B-QC 0.0 Floor RSCS TSD 25-032 Rev 0 Page 10 of 86

Sample ID Sample Depth (inches)

Wall/Floor RCA-RXB-CONC-041-0.0-B-QC 0.0 Floor RCA-RXB-CONC-043-0.0-B-QC 0.0 Floor RCA-RXB-CONC-046-0.0-B-QC 0.0 Floor RCA-RXB-CONC-048-0.0-B-QC 0.0 Floor RCA-RXBT-CONC-001-0.0-B-D-QC 0.0 Floor RCA-RXBT-CONC-002-0.0-B-QC 0.0 Wall RCA-RXBT-CONC-003-0.0-B-QC 0.0 Floor RCA-TURB-CONC-033-0.5-B-I-QC 0.5 Floor RCA-TURB-CONC-033-1.0-B-I-QC 1.0 Floor RCA-TURB-CONC-033-1.5-B-I-QC 1.5 Floor RCA-TURT-CONC-001-0.0-B-QC 0.0 Floor RCA-TURT-CONC-003-0.0-B-QC 0.0 Floor RCA-TURT-CONC-005-0.0-B-QC 0.0 Floor RCA-TURT-CONC-005-0.5-B-QC 0.5 Floor RCA-TURT-CONC-007-0.0-B-D-QC 0.0 Floor RCA-TURT-CONC-007-0.5-B-D-QC 0.5 Floor RCA-TURT-CONC-009-0.0-B-QC 0.0 Floor The reported concrete sample concentrations were decay-corrected from the sample collection dates to the earliest anticipated license termination date of September 17, 2026 (which is consistent with the date used in BHI Technical Basis Document No. 20-6002-1362). These results include all valid results as reported by GEL Laboratories (GEL), whether or not they were less than any screening value, including the Minimum Detectable Concentration (MDC). Negative reported results have been reset to zero to avoid generating fractional results greater than one. When the laboratory reported two radionuclides per analysis (e.g., Cm-243/244 or Pu-239/240), the longer half-life of the pair was used for decay correction. The average decay-corrected MDC values for the 58 concrete samples are shown in Table 2-4 below.

The decay-corrected Am-241 concentrations also include the in-growth of activity from the decay of Pu-241, as shown in Equation 1.

Equation 1

()2 = 21 0

2 1 12+ 22 Where:

(At)2

= Am-241 concentration corrected for in-growth from Pu-241 1

0

= Pu-241 activity 2

= Am-241 decay constant 1

= Pu-241 decay constant A2

= Am-241 activity t

= Time between sample collection and license termination RSCS TSD 25-032 Rev 0 Page 11 of 86

Table 2 Average Decay-Corrected MDCs from GEL Analysis Results of Concrete Samples for Each Radionuclide Radionuclide Concrete Average MDC (pCi/g)

Am-241 4.89E-01 C-14 1.37E+01 Cm-243/244 4.41E-01 Co-60 2.62E-01 Cs-137 6.64E-01 Eu-152 1.79E+00 Eu-154 8.89E-01 Fe-55 3.90E+01 H-3 1.19E+01 Mn-54 6.18E-02 Nb-94 4.76E-01 Ni-63 9.05E+02 Np-237 5.81E-02 Pu-238 2.71E-01 Pu-239/240 2.80E-01 Pu-241 2.39E+01 Sb-125 1.19E+00 Sr-90 1.59E-01 Tc-99 1.94E+00 2.3 Establishing Representative Populations and Mixtures The complete concrete characterization population, as described in Section 2.2 was first evaluated to establish representative populations for the FSS ROC determination. Additional evaluations will be performed in this TSD on these representative populations (e.g., radionuclide mixture-fraction analyses, IC dose evaluations, and surrogate ratio determinations).

To establish the representative populations, evaluations of the sample locations that include radionuclide detection greater than the MDC were performed for the characterization results.

The MDC levels are used for these qualitative analyses, though actual laboratory results are still used for quantitative evaluations (e.g., mixture/activity fractions, ratios, etc.), as described in Section 2.2.

2.3.1 Population Evaluations The population evaluations indicated, on a per survey-area basis, when each radionuclide was detected at least once above the respective MDC level. These results are shown in Table 2-5.

RSCS TSD 25-032 Rev 0 Page 12 of 86

Table 2 Radionuclides With One or More Detections Above MDC By Location Survey Area 241Am 14C 243/244Cm 60Co 137Cs 55Fe 3H 54Mn 63Ni 238Pu 239/240Pu 241Pu 90Sr 99Tc RCA-BSTK X

X X

X X

X X

X X

X RCA-NRWT X

X X

X X

X X

RCA-RXB X

X X

X X

X X

X X

X RCA-RXBT X

X X

X RCA-TURB X

RCA-TURT X

X X

2.3.2 Determination of Representative Populations Representative populations were established using historical process knowledge and the initial evaluations of the concrete sample results, as described in Section 2.3.1. Two populations were established for further evaluation, as shown in Table 2-6 and discussed below.

Table 2 Representative Population Areas Population Area Name Number of Samples Reactor Building (RXB) 35 Remainder 23 The evaluation of radionuclide detections compared to the MDC indicated that Cs-137 was detected above an MDC in all areas, and Co-60 and Sr-90 were detected in a majority of the survey areas. The largest number of occurrences (10 radionuclides) above the MDC were observed in the RXB and BSTK populations. An RXB population was selected as a single population to contain all of the RXB samples. The second population was designated as the Remainder and selected to include the BSTK, NRWT, RXBT, TURB, and TURT samples. The use of a discrete reactor building population is consistent with past practice, and there is an expectation that the activity fractions associated with the reactor building will be unique (this was confirmed during the activity fraction determination discussed in Section 2.4). Additionally, a comparison of the detections above the MDC was performed for the respective RXB and Remainder populations compared to all samples combined into a single population (as shown in Table 2-7), and different incidences of detection were noted between the two RXB and Remainder populations.

RSCS TSD 25-032 Rev 0 Page 13 of 86

Table 2 Sample Detections Above MDC by Population Radionuclide All Samples RXB Samples Remainder Samples Samples

> MDC

% Samples

> MDC Samples

> MDC

% Samples

> MDC Samples

> MDC

% Samples

> MDC Am-241 10 17.2%

9 25.7%

1 4.3%

C-14 1

1.7%

0 0.0%

1 4.3%

Cm-243/244 1

1.7%

1 2.9%

0 0.0%

Co-60 50 86.2%

33 94.3%

17 73.9%

Cs-137 58 100.0%

35 100.0%

23 100.0%

Eu-152 0

0.0%

0 0.0%

0 0.0%

Eu-154 0

0.0%

0 0.0%

0 0.0%

Fe-55 5

8.6%

2 5.7%

3 13.0%

H-3 1

1.7%

0 0.0%

1 4.3%

Mn-54 3

5.2%

0 0.0%

3 13.0%

Nb-94 0

0.0%

0 0.0%

0 0.0%

Ni-63 7

12.1%

4 11.4%

3 13.0%

Np-237 0

0.0%

0 0.0%

0 0.0%

Pu-238 3

5.2%

2 5.7%

1 4.3%

Pu-239/240 5

8.6%

4 11.4%

1 4.3%

Pu-241 1

1.7%

1 2.9%

0 0.0%

Sb-125 0

0.0%

0 0.0%

0 0.0%

Sr-90 43 74.1%

27 77.1%

16 69.6%

Tc-99 1

1.7%

0 0.0%

1 4.3%

Overall > MDC 189 17.2%

118 17.7%

71 16.2%

Total Radionuclide Analyses 1102 665 437 Total Samples 58 35 23 2.4 Radionuclide Mixture and Insignificant Dose Contributors One of the objectives of site characterization is to establish the radionuclide profiles for the various media for the purposes of ALARA analysis, dose assessment, and FSS planning. The evaluation provided in this section determines the radionuclide mixture fractions of the initial suite of radionuclides and selects the radionuclides that are insignificant dose contributors as defined in NUREG-1757, Vol. 2, Rev 2 (NRC, 2022). These evaluations are performed on the two sample populations determined in Section 2.3 - the RXB and Remainder populations. The radionuclides remaining after elimination of the insignificant dose contributors are the FSS ROCs that will undergo detailed analysis in Chapters 5 and 6 of the OCS LTP. The insignificant contributor (IC) dose fraction will be accounted for by adjusting the final DCGL for each ROC. This TSD section is divided into two subsections: Section 2.4.1 describes the determination of radionuclide mixture fractions using three different methods, and Section 2.4.2 establishes the IC dose fraction for each medias set of DCGLs.

RSCS TSD 25-032 Rev 0 Page 14 of 86

During decommissioning, the RXB mixture fraction will apply to the concrete from the Reactor Building walls and floors, and the Remainder mixture fraction will apply to all basement walls and floors other than the Reactor Building. Embedded and buried piping contamination can vary depending on the basement/area with which the piping is associated. Because of this, embedded and buried piping mixture fractions are established separately depending on the assumed location of the piping of interest using the two concrete, RXB and Remainder, populations.

Additional sampling in embedded and buried piping is planned as continuing characterization during decommissioning, and future characterization results may be used to validate or revise the embedded/buried piping radionuclide mixtures and the associated IC dose or applicable surrogate relationships.

Due to the limited amount of activity that has been observed in soil characterization, concrete mixture fractions will be used for soils, and the source of soil contamination during plant operation is considered more likely to occur from the various Remainder population buildings as opposed to the Reactor Building.

2.4.1 Radionuclide Mixture Fraction Determination Radionuclide activity mixture fractions are derived from the characterization sample results described in Section 2.2. Process knowledge and the initial evaluation of the sample results were used to establish the representative mixtures to be used for further IC dose evaluation.

As an initial evaluation, activity fractions were calculated for the entire concrete (58 samples) population as well as the two representative RXB and Remainder populations established in Section 2.3. The RXB and Remainder concrete populations are further evaluated in this TSD to develop the IC dose and the FSS ROCs. Separate DCGLs have also been developed specific to concrete, soil, and buried/embedded piping and will be used in the respective IC dose analyses.

For reference, the activity fractions that were generated for the entire concrete population are also provided in Attachment 5.2 Table 5-4 to Table 5-9.

For each of the sample populations, k, the decay-corrected radionuclide activity fractions were determined using three separate approaches as described below in Equation 2 to Equation 5. The three methods were chosen to represent common and conservative methods in determining activity fractions to ensure that the final selection of the radionuclide mixtures account for variability and represent conservative estimates.

Each of the three analysis methods uses the actual reported laboratory values, whether detected above or less than the reported MDC values. All negative results were reset to zero to avoid generating fractional results greater than one. The results were decay-corrected from the date of sample collection to the earliest anticipated date of license termination. The Am-241 results also account for in-growth from Pu-241, as described in Equation 1.

RSCS TSD 25-032 Rev 0 Page 15 of 86

1. The first method was to calculate the radionuclide activity fraction, fAi,j,k, for each sample, j, and each radionuclide, i, within each population, k, from the reported radionuclide activity concentrations, Ci,j,k, using Equation 2.

,,=

(),,

Equation 2 The average activity fraction, fAi,j,k,avg, across all N samples, j, for each radionuclide, i, and population, k, was then calculated using Equation 3.

,,,=

(),,

Equation 3

2. The second method was to calculate the 75th percentile, fi,j,k,.75, of each group of activity fractions (as was determined via Equation 2), for each radionuclide, i, over all samples, j, in population, k. Once the 75th percentile fractions were calculated for each radionuclide, each radionuclides data set was re-normalized to determine the percentile-based activity fractions, fAi,k,.75 using Equation 4.

,,.75 =

,,,.75

(),,,.75 Equation 4

3. The third method was to calculate the individual radionuclide ratios to Cs-137 for each sample, Ri,Cs-137,j, then calculate the 75th percentile for each radionuclides set of ratios across all samples, Ri,Cs-137,k,.75, followed by renormalization to determine the activity fractions, fRAi,k,.75 using Equation 5.

,,.75 =

,137,,.75

(),137,,.75 Equation 5 The analyses described above remove the activity weighting and give equal statistical weight to each of the sample results. The results of the three methods are provided within the following subsections.

RSCS TSD 25-032 Rev 0 Page 16 of 86

2.4.1.1 Concrete Sample Analyses and Mixture Fractions The concrete activity mixture fractions were evaluated for the two representative populations as described in Section 2.4.1.1.1 and 2.4.1.1.2 below. For each population, the activity fraction data are subdivided into three tables to allow for convenient inspection of all 21 radionuclides. The last three rows of these tables provide the average fraction, the 75th percentile of each fractional data set, and the normalized 75th percentile data set as described in Equation 2 to Equation 4 above. Similar to the activity fraction tables, the Cs-137 ratio data are also subdivided into three tables to allow for convenient inspection of all 21 radionuclides. The last two rows of these tables provide the 75th percentile of each ratio data set and the normalized 75th percentile data set as described in Equation 5 above.

2.4.1.1.1 Reactor Building (RXB) Sample Population Mixture Fractions A series of 35 concrete samples were evaluated from the Reactor Building as the RXB population.

Table 2-8 through Table 2-10 provide the radionuclide activity fractions for all reactor building concrete samples. Table 2-11 through Table 2-13 provide the radionuclide activity ratios to Cs-137 for all reactor building concrete samples.

RSCS TSD 25-032 Rev 0 Page 17 of 86

Table 2 RXB Concrete Radionuclide Activity Fractions, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-RXB-CONC-002-0.0-B-QC 6.78E-05 6.25E-05 2.58E-05 8.24E-03 9.74E-01 0.00E+00 RCA-RXB-CONC-003-0.0-B-QC 7.88E-04 0.00E+00 0.00E+00 1.21E-01 6.97E-01 9.58E-04 RCA-RXB-CONC-004-0.0-B-D-QC 1.38E-03 3.86E-03 1.70E-03 2.85E-02 7.64E-01 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 2.44E-02 0.00E+00 5.11E-03 9.40E-01 3.79E-04 RCA-RXB-CONC-011-0.0-B-QC 1.21E-04 2.40E-02 1.67E-03 3.99E-03 9.40E-01 2.73E-04 RCA-RXB-CONC-012-0.0-B-D-QC 7.89E-05 2.73E-03 0.00E+00 1.44E-02 9.44E-01 1.36E-03 RCA-RXB-CONC-012-1.0-B-D-QC 1.50E-04 2.04E-02 5.08E-04 2.35E-04 8.18E-01 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 2.79E-04 0.00E+00 0.00E+00 1.18E-02 9.39E-01 0.00E+00 RCA-RXB-CONC-014-0.5-B-QC 4.81E-03 0.00E+00 0.00E+00 9.10E-04 9.64E-01 2.21E-03 RCA-RXB-CONC-019-0.0-B-QC 4.17E-05 0.00E+00 6.34E-04 8.03E-03 9.63E-01 4.05E-04 RCA-RXB-CONC-020-0.0-B-QC 5.74E-03 0.00E+00 0.00E+00 1.76E-02 9.62E-01 2.15E-04 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.00E-03 9.35E-01 0.00E+00 RCA-RXB-CONC-023-0.0-B-QC 9.89E-05 5.03E-03 0.00E+00 5.86E-02 8.77E-01 0.00E+00 RCA-RXB-CONC-023-0.5-B-QC 7.18E-05 7.79E-02 0.00E+00 3.87E-03 7.60E-01 6.62E-04 RCA-RXB-CONC-024-0.0-B-QC 6.72E-04 3.43E-03 0.00E+00 3.67E-02 9.37E-01 3.31E-04 RCA-RXB-CONC-024-0.5-B-QC 6.72E-04 3.25E-02 0.00E+00 6.42E-03 7.03E-01 1.08E-04 RCA-RXB-CONC-025-0.0-B-QC 8.81E-04 0.00E+00 1.03E-04 5.91E-02 8.81E-01 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 6.70E-04 1.44E-02 3.27E-05 5.55E-02 8.36E-01 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 2.00E-04 2.97E-03 0.00E+00 2.06E-01 6.63E-01 1.02E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 1.61E-02 0.00E+00 1.45E-01 7.08E-01 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 2.53E-04 7.71E-03 1.49E-04 1.66E-01 7.20E-01 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 3.00E-04 0.00E+00 2.07E-04 1.85E-02 9.44E-01 8.87E-05 RCA-RXB-CONC-030-0.5-B-QC 1.40E-04 7.38E-03 0.00E+00 1.18E-03 8.83E-01 0.00E+00 RCA-RXB-CONC-032-0.0-B-QC 5.66E-04 2.17E-03 9.92E-05 1.33E-02 9.76E-01 3.54E-05 RCA-RXB-CONC-034-0.0-B-QC 7.71E-05 1.15E-03 3.84E-05 9.80E-03 9.77E-01 0.00E+00 RCA-RXB-CONC-035-0.0-B-QC 4.32E-03 6.40E-03 2.75E-04 1.38E-01 7.83E-01 0.00E+00 RCA-RXB-CONC-035-0.5-B-QC 1.73E-04 2.56E-02 0.00E+00 1.21E-02 8.34E-01 1.98E-03 RCA-RXB-CONC-036-0.0-B-QC 9.44E-03 2.29E-03 1.78E-03 1.34E-01 6.77E-01 5.55E-04 RCA-RXB-CONC-037-0.0-B-QC 1.28E-03 0.00E+00 0.00E+00 1.73E-01 4.70E-01 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 3.41E-03 0.00E+00 0.00E+00 1.24E-01 8.00E-01 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.66E-04 4.23E-03 0.00E+00 5.70E-03 9.68E-01 3.56E-04 RCA-RXB-CONC-041-0.0-B-QC 3.85E-04 1.42E-03 1.05E-04 2.17E-02 8.27E-01 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.17E-03 2.32E-03 9.90E-05 4.97E-02 9.04E-01 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 2.69E-04 2.35E-03 2.00E-05 9.40E-03 9.67E-01 2.13E-04 RCA-RXB-CONC-048-0.0-B-QC 6.25E-04 3.99E-03 1.12E-05 3.66E-02 9.22E-01 0.00E+00 Average (fAi,j,k,avg) 1.12E-03 8.42E-03 2.13E-04 4.87E-02 8.53E-01 2.93E-04 75 Percentile Fraction (fi,j,k,.75) 8.34E-04 7.55E-03 1.04E-04 5.88E-02 9.44E-01 3.44E-04 75 Perc. Norm. Frac. (fAi,k,.75) 7.48E-04 6.77E-03 9.31E-05 5.28E-02 8.46E-01 3.08E-04 RSCS TSD 25-032 Rev 0 Page 18 of 86

Table 2 RXB Concrete Radionuclide Activity Fractions, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-RXB-CONC-002-0.0-B-QC 0.00E+00 4.24E-03 2.01E-03 0.00E+00 0.00E+00 4.26E-03 RCA-RXB-CONC-003-0.0-B-QC 5.07E-04 0.00E+00 0.00E+00 0.00E+00 2.74E-04 1.62E-01 RCA-RXB-CONC-004-0.0-B-D-QC 5.97E-04 0.00E+00 0.00E+00 0.00E+00 1.90E-04 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 3.00E-04 0.00E+00 0.00E+00 9.20E-06 0.00E+00 2.88E-02 RCA-RXB-CONC-011-0.0-B-QC 1.05E-03 0.00E+00 0.00E+00 4.70E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-012-0.0-B-D-QC 5.37E-04 0.00E+00 0.00E+00 1.62E-05 7.18E-05 3.09E-02 RCA-RXB-CONC-012-1.0-B-D-QC 1.66E-05 1.04E-01 4.10E-03 7.11E-06 2.54E-04 2.30E-02 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 0.00E+00 3.08E-03 3.82E-06 2.54E-06 5.39E-03 RCA-RXB-CONC-014-0.5-B-QC 2.24E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 3.29E-05 5.28E-05 1.80E-02 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.11E-04 0.00E+00 RCA-RXB-CONC-020-0.5-B-QC 1.62E-04 2.30E-02 0.00E+00 1.94E-05 1.56E-04 3.52E-02 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 3.73E-02 8.99E-03 3.93E-06 0.00E+00 9.94E-03 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 1.01E-01 0.00E+00 6.17E-05 0.00E+00 4.22E-02 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 0.00E+00 1.55E-03 8.77E-06 3.61E-05 9.96E-03 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 0.00E+00 7.91E-02 1.46E-06 1.57E-04 3.58E-02 RCA-RXB-CONC-025-0.0-B-QC 7.32E-05 0.00E+00 0.00E+00 2.32E-06 0.00E+00 2.73E-02 RCA-RXB-CONC-026-0.0-B-D-QC 2.01E-04 4.06E-02 1.43E-02 2.93E-05 2.80E-04 2.66E-02 RCA-RXB-CONC-027-0.0-B-QC 1.86E-04 5.21E-02 1.03E-02 1.83E-05 0.00E+00 5.71E-02 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 8.64E-02 1.76E-02 3.65E-05 2.12E-04 2.47E-02 RCA-RXB-CONC-029-0.0-B-QC 4.79E-04 3.83E-02 5.48E-03 2.87E-05 0.00E+00 3.73E-02 RCA-RXB-CONC-030-0.0-B-QC 6.96E-05 1.26E-02 0.00E+00 1.30E-05 4.74E-05 1.53E-02 RCA-RXB-CONC-030-0.5-B-QC 1.89E-04 1.24E-02 0.00E+00 0.00E+00 4.31E-05 7.36E-02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 3.08E-03 1.98E-04 0.00E+00 5.11E-05 1.83E-03 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 1.93E-03 1.49E-03 0.00E+00 1.61E-05 2.40E-03 RCA-RXB-CONC-035-0.0-B-QC 0.00E+00 2.13E-02 0.00E+00 4.74E-05 2.33E-04 2.12E-02 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.07E-03 0.00E+00 7.33E-05 8.94E-02 RCA-RXB-CONC-036-0.0-B-QC 1.97E-04 5.95E-02 2.82E-03 9.26E-06 4.20E-04 4.87E-02 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 0.00E+00 8.86E-02 1.23E-04 0.00E+00 1.10E-01 RCA-RXB-CONC-038-0.0-B-QC 2.02E-04 0.00E+00 1.59E-02 8.39E-06 0.00E+00 2.45E-02 RCA-RXB-CONC-040-0.0-B-QC 3.80E-05 0.00E+00 4.49E-03 0.00E+00 9.65E-05 6.98E-03 RCA-RXB-CONC-041-0.0-B-QC 1.37E-05 6.27E-02 3.66E-02 0.00E+00 2.02E-04 3.51E-02 RCA-RXB-CONC-043-0.0-B-QC 0.00E+00 0.00E+00 2.32E-03 3.14E-05 2.04E-04 9.60E-03 RCA-RXB-CONC-046-0.0-B-QC 0.00E+00 2.69E-03 0.00E+00 3.12E-06 0.00E+00 1.05E-02 RCA-RXB-CONC-048-0.0-B-QC 0.00E+00 5.07E-03 7.40E-03 2.15E-05 0.00E+00 1.05E-02 Average (fAi,j,k,avg) 1.44E-04 1.91E-02 8.78E-03 1.67E-05 1.05E-04 2.97E-02 75 Percentile Fraction (fi,j,k,.75) 1.99E-04 3.02E-02 6.44E-03 2.51E-05 1.96E-04 3.55E-02 75 Perc. Norm. Frac. (fAi,k,.75) 1.78E-04 2.71E-02 5.77E-03 2.25E-05 1.76E-04 3.18E-02 RSCS TSD 25-032 Rev 0 Page 19 of 86

Table 2 RXB Concrete Radionuclide Activity Fractions, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-RXB-CONC-002-0.0-B-QC 2.24E-06 1.33E-05 2.70E-05 1.56E-03 2.72E-04 5.70E-03 6.54E-06 RCA-RXB-CONC-003-0.0-B-QC 4.17E-06 4.76E-04 5.45E-04 1.12E-02 8.29E-04 2.36E-03 1.59E-03 RCA-RXB-CONC-004-0.0-B-D-QC 5.18E-05 3.36E-04 0.00E+00 1.96E-01 1.24E-03 6.05E-04 1.29E-03 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 3.72E-05 3.61E-04 0.00E+00 7.15E-04 2.98E-04 0.00E+00 RCA-RXB-CONC-011-0.0-B-QC 3.71E-05 0.00E+00 6.63E-04 2.27E-02 7.82E-04 6.27E-04 4.37E-03 RCA-RXB-CONC-012-0.0-B-D-QC 3.71E-06 3.82E-05 2.31E-05 0.00E+00 0.00E+00 4.70E-03 9.42E-04 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 5.32E-04 0.00E+00 2.81E-02 0.00E+00 2.65E-04 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 2.12E-04 0.00E+00 2.96E-02 3.57E-04 8.34E-03 1.61E-03 RCA-RXB-CONC-014-0.5-B-QC 2.15E-04 1.81E-03 4.29E-04 1.62E-02 0.00E+00 8.91E-03 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 1.51E-05 0.00E+00 1.38E-04 7.90E-03 6.35E-04 0.00E+00 1.21E-03 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 7.45E-04 0.00E+00 0.00E+00 0.00E+00 4.31E-03 8.51E-03 RCA-RXB-CONC-020-0.5-B-QC 1.30E-04 9.09E-04 2.25E-04 0.00E+00 0.00E+00 6.27E-04 1.22E-03 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.43E-03 1.87E-04 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 0.00E+00 3.31E-04 1.36E-02 0.00E+00 2.19E-04 0.00E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 8.56E-05 2.33E-05 5.63E-03 0.00E+00 4.58E-03 0.00E+00 RCA-RXB-CONC-024-0.5-B-QC 1.85E-04 0.00E+00 1.36E-03 1.27E-01 1.44E-03 1.15E-02 5.71E-04 RCA-RXB-CONC-025-0.0-B-QC 3.16E-06 3.86E-04 9.09E-05 2.51E-02 1.16E-03 4.76E-03 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 0.00E+00 1.33E-05 7.36E-03 6.45E-04 3.37E-03 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 0.00E+00 9.90E-05 1.53E-04 6.69E-03 1.14E-04 1.09E-03 0.00E+00 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.19E-03 9.29E-04 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 4.56E-07 1.05E-04 2.62E-05 2.32E-02 0.00E+00 1.08E-03 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 7.72E-05 1.08E-04 7.54E-03 0.00E+00 1.15E-03 4.89E-04 RCA-RXB-CONC-030-0.5-B-QC 4.26E-05 0.00E+00 0.00E+00 2.14E-02 3.14E-04 4.60E-04 3.57E-04 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 2.24E-04 0.00E+00 2.82E-04 0.00E+00 2.22E-03 6.33E-05 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 5.09E-05 1.88E-05 2.33E-03 0.00E+00 3.94E-03 1.66E-04 RCA-RXB-CONC-035-0.0-B-QC 4.49E-06 1.87E-03 1.16E-03 1.34E-02 1.10E-03 6.15E-03 9.26E-04 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.55E-04 3.25E-02 1.58E-03 3.56E-04 1.46E-03 RCA-RXB-CONC-036-0.0-B-QC 1.68E-06 2.24E-03 2.30E-03 2.26E-02 2.30E-05 3.63E-02 0.00E+00 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 1.08E-03 3.50E-04 6.45E-02 3.12E-03 8.84E-02 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 9.23E-05 7.52E-04 9.19E-04 3.05E-02 1.27E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.79E-06 2.33E-04 1.03E-05 6.62E-03 0.00E+00 3.12E-03 0.00E+00 RCA-RXB-CONC-041-0.0-B-QC 0.00E+00 3.11E-04 1.99E-04 1.01E-02 0.00E+00 4.49E-03 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.50E-05 1.56E-04 3.47E-05 2.23E-02 0.00E+00 8.10E-03 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 1.27E-05 1.09E-04 1.51E-04 0.00E+00 0.00E+00 6.76E-03 0.00E+00 RCA-RXB-CONC-048-0.0-B-QC 3.36E-06 1.67E-04 3.36E-04 6.99E-03 0.00E+00 5.94E-03 4.71E-04 Average (fAi,j,k,avg) 2.35E-05 3.73E-04 2.90E-04 2.18E-02 4.43E-04 6.69E-03 7.27E-04 75 Percentile Fraction (fi,j,k,.75) 1.38E-05 4.31E-04 3.43E-04 2.29E-02 7.48E-04 5.82E-03 9.34E-04 75 Perc. Norm. Frac. (fAi,k,.75) 1.24E-05 3.87E-04 3.08E-04 2.06E-02 6.71E-04 5.22E-03 8.37E-04 RSCS TSD 25-032 Rev 0 Page 20 of 86

Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-RXB-CONC-002-0.0-B-QC 6.97E-05 6.42E-05 2.65E-05 8.46E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-003-0.0-B-QC 1.13E-03 0.00E+00 0.00E+00 1.73E-01 1.00E+00 1.37E-03 RCA-RXB-CONC-004-0.0-B-D-QC 1.81E-03 5.05E-03 2.22E-03 3.73E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 2.60E-02 0.00E+00 5.44E-03 1.00E+00 4.03E-04 RCA-RXB-CONC-011-0.0-B-QC 1.28E-04 2.56E-02 1.78E-03 4.25E-03 1.00E+00 2.91E-04 RCA-RXB-CONC-012-0.0-B-D-QC 8.36E-05 2.90E-03 0.00E+00 1.52E-02 1.00E+00 1.44E-03 RCA-RXB-CONC-012-1.0-B-D-QC 1.83E-04 2.50E-02 6.21E-04 2.88E-04 1.00E+00 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 2.97E-04 0.00E+00 0.00E+00 1.25E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-014-0.5-B-QC 4.98E-03 0.00E+00 0.00E+00 9.44E-04 1.00E+00 2.29E-03 RCA-RXB-CONC-019-0.0-B-QC 4.34E-05 0.00E+00 6.59E-04 8.34E-03 1.00E+00 4.21E-04 RCA-RXB-CONC-020-0.0-B-QC 5.96E-03 0.00E+00 0.00E+00 1.82E-02 1.00E+00 2.23E-04 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.20E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-023-0.0-B-QC 1.13E-04 5.73E-03 0.00E+00 6.68E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-023-0.5-B-QC 9.45E-05 1.03E-01 0.00E+00 5.09E-03 1.00E+00 8.71E-04 RCA-RXB-CONC-024-0.0-B-QC 7.17E-04 3.66E-03 0.00E+00 3.92E-02 1.00E+00 3.54E-04 RCA-RXB-CONC-024-0.5-B-QC 9.55E-04 4.62E-02 0.00E+00 9.13E-03 1.00E+00 1.54E-04 RCA-RXB-CONC-025-0.0-B-QC 1.00E-03 0.00E+00 1.17E-04 6.70E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 8.01E-04 1.72E-02 3.92E-05 6.64E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 3.02E-04 4.48E-03 0.00E+00 3.10E-01 1.00E+00 1.54E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.28E-02 0.00E+00 2.05E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 3.51E-04 1.07E-02 2.07E-04 2.30E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 3.18E-04 0.00E+00 2.20E-04 1.96E-02 1.00E+00 9.40E-05 RCA-RXB-CONC-030-0.5-B-QC 1.59E-04 8.37E-03 0.00E+00 1.33E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-032-0.0-B-QC 5.80E-04 2.23E-03 1.02E-04 1.37E-02 1.00E+00 3.63E-05 RCA-RXB-CONC-034-0.0-B-QC 7.89E-05 1.18E-03 3.93E-05 1.00E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-035-0.0-B-QC 5.52E-03 8.18E-03 3.51E-04 1.77E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-035-0.5-B-QC 2.08E-04 3.07E-02 0.00E+00 1.46E-02 1.00E+00 2.38E-03 RCA-RXB-CONC-036-0.0-B-QC 1.39E-02 3.38E-03 2.63E-03 1.97E-01 1.00E+00 8.20E-04 RCA-RXB-CONC-037-0.0-B-QC 2.72E-03 0.00E+00 0.00E+00 3.68E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 4.26E-03 0.00E+00 0.00E+00 1.55E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.72E-04 4.37E-03 0.00E+00 5.89E-03 1.00E+00 3.68E-04 RCA-RXB-CONC-041-0.0-B-QC 4.66E-04 1.71E-03 1.27E-04 2.62E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.29E-03 2.57E-03 1.10E-04 5.49E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 2.78E-04 2.43E-03 2.06E-05 9.72E-03 1.00E+00 2.20E-04 RCA-RXB-CONC-048-0.0-B-QC 6.78E-04 4.33E-03 1.22E-05 3.97E-02 1.00E+00 0.00E+00 75 Percentile Ratio (Ri,Cs-137,k,.75) 1.06E-03 9.54E-03 1.22E-04 6.69E-02 1.00E+00 3.61E-04 75 Perc. Norm. Ratio (fRAi,k,.75) 8.82E-04 7.90E-03 1.01E-04 5.55E-02 8.29E-01 2.99E-04 RSCS TSD 25-032 Rev 0 Page 21 of 86

Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-RXB-CONC-002-0.0-B-QC 0.00E+00 4.36E-03 2.07E-03 0.00E+00 0.00E+00 4.38E-03 RCA-RXB-CONC-003-0.0-B-QC 7.27E-04 0.00E+00 0.00E+00 0.00E+00 3.93E-04 2.33E-01 RCA-RXB-CONC-004-0.0-B-D-QC 7.81E-04 0.00E+00 0.00E+00 0.00E+00 2.49E-04 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 3.19E-04 0.00E+00 0.00E+00 9.80E-06 0.00E+00 3.07E-02 RCA-RXB-CONC-011-0.0-B-QC 1.11E-03 0.00E+00 0.00E+00 5.00E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-012-0.0-B-D-QC 5.69E-04 0.00E+00 0.00E+00 1.72E-05 7.60E-05 3.27E-02 RCA-RXB-CONC-012-1.0-B-D-QC 2.02E-05 1.27E-01 5.01E-03 8.68E-06 3.11E-04 2.81E-02 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 0.00E+00 3.28E-03 4.06E-06 2.70E-06 5.73E-03 RCA-RXB-CONC-014-0.5-B-QC 2.32E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 3.42E-05 5.48E-05 1.87E-02 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.35E-04 0.00E+00 RCA-RXB-CONC-020-0.5-B-QC 1.73E-04 2.46E-02 0.00E+00 2.07E-05 1.67E-04 3.77E-02 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 4.25E-02 1.02E-02 4.48E-06 0.00E+00 1.13E-02 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 1.32E-01 0.00E+00 8.11E-05 0.00E+00 5.56E-02 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 0.00E+00 1.66E-03 9.36E-06 3.85E-05 1.06E-02 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 0.00E+00 1.12E-01 2.08E-06 2.24E-04 5.09E-02 RCA-RXB-CONC-025-0.0-B-QC 8.30E-05 0.00E+00 0.00E+00 2.63E-06 0.00E+00 3.10E-02 RCA-RXB-CONC-026-0.0-B-D-QC 2.40E-04 4.86E-02 1.72E-02 3.51E-05 3.35E-04 3.18E-02 RCA-RXB-CONC-027-0.0-B-QC 2.80E-04 7.86E-02 1.55E-02 2.76E-05 0.00E+00 8.61E-02 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 1.22E-01 2.48E-02 5.16E-05 3.00E-04 3.49E-02 RCA-RXB-CONC-029-0.0-B-QC 6.66E-04 5.33E-02 7.62E-03 3.99E-05 0.00E+00 5.18E-02 RCA-RXB-CONC-030-0.0-B-QC 7.37E-05 1.34E-02 0.00E+00 1.37E-05 5.02E-05 1.62E-02 RCA-RXB-CONC-030-0.5-B-QC 2.15E-04 1.40E-02 0.00E+00 0.00E+00 4.88E-05 8.33E-02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 3.16E-03 2.03E-04 0.00E+00 5.23E-05 1.88E-03 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 1.97E-03 1.52E-03 0.00E+00 1.65E-05 2.46E-03 RCA-RXB-CONC-035-0.0-B-QC 0.00E+00 2.71E-02 0.00E+00 6.05E-05 2.97E-04 2.71E-02 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.28E-03 0.00E+00 8.80E-05 1.07E-01 RCA-RXB-CONC-036-0.0-B-QC 2.90E-04 8.79E-02 4.16E-03 1.37E-05 6.20E-04 7.19E-02 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 0.00E+00 1.89E-01 2.61E-04 0.00E+00 2.33E-01 RCA-RXB-CONC-038-0.0-B-QC 2.53E-04 0.00E+00 1.98E-02 1.05E-05 0.00E+00 3.06E-02 RCA-RXB-CONC-040-0.0-B-QC 3.92E-05 0.00E+00 4.64E-03 0.00E+00 9.97E-05 7.21E-03 RCA-RXB-CONC-041-0.0-B-QC 1.66E-05 7.58E-02 4.42E-02 0.00E+00 2.44E-04 4.24E-02 RCA-RXB-CONC-043-0.0-B-QC 0.00E+00 0.00E+00 2.56E-03 3.47E-05 2.25E-04 1.06E-02 RCA-RXB-CONC-046-0.0-B-QC 0.00E+00 2.78E-03 0.00E+00 3.22E-06 0.00E+00 1.09E-02 RCA-RXB-CONC-048-0.0-B-QC 0.00E+00 5.50E-03 8.02E-03 2.34E-05 0.00E+00 1.14E-02 75 Percentile Ratio (Ri,Cs-137,k,.75) 2.46E-04 3.48E-02 7.82E-03 3.09E-05 2.35E-04 4.66E-02 75 Perc. Norm. Ratio (fRAi,k,.75) 2.04E-04 2.89E-02 6.48E-03 2.56E-05 1.95E-04 3.86E-02 RSCS TSD 25-032 Rev 0 Page 22 of 86

Table 2 RXB Concrete Radionuclide Activity Ratios to Cs-137, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-RXB-CONC-002-0.0-B-QC 2.30E-06 1.36E-05 2.78E-05 1.60E-03 2.79E-04 5.86E-03 6.71E-06 RCA-RXB-CONC-003-0.0-B-QC 5.98E-06 6.82E-04 7.82E-04 1.61E-02 1.19E-03 3.38E-03 2.29E-03 RCA-RXB-CONC-004-0.0-B-D-QC 6.78E-05 4.40E-04 0.00E+00 2.57E-01 1.62E-03 7.92E-04 1.69E-03 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 3.96E-05 3.84E-04 0.00E+00 7.61E-04 3.17E-04 0.00E+00 RCA-RXB-CONC-011-0.0-B-QC 3.94E-05 0.00E+00 7.06E-04 2.41E-02 8.32E-04 6.67E-04 4.65E-03 RCA-RXB-CONC-012-0.0-B-D-QC 3.93E-06 4.05E-05 2.44E-05 0.00E+00 0.00E+00 4.98E-03 9.97E-04 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 6.50E-04 0.00E+00 3.44E-02 0.00E+00 3.24E-04 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 2.25E-04 0.00E+00 3.15E-02 3.80E-04 8.88E-03 1.72E-03 RCA-RXB-CONC-014-0.5-B-QC 2.23E-04 1.88E-03 4.45E-04 1.68E-02 0.00E+00 9.24E-03 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 1.57E-05 0.00E+00 1.43E-04 8.21E-03 6.59E-04 0.00E+00 1.26E-03 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 7.74E-04 0.00E+00 0.00E+00 0.00E+00 4.47E-03 8.84E-03 RCA-RXB-CONC-020-0.5-B-QC 1.39E-04 9.72E-04 2.41E-04 0.00E+00 0.00E+00 6.70E-04 1.31E-03 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.77E-03 2.14E-04 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 0.00E+00 4.35E-04 1.78E-02 0.00E+00 2.88E-04 0.00E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 9.13E-05 2.48E-05 6.01E-03 0.00E+00 4.89E-03 0.00E+00 RCA-RXB-CONC-024-0.5-B-QC 2.63E-04 0.00E+00 1.93E-03 1.80E-01 2.04E-03 1.64E-02 8.12E-04 RCA-RXB-CONC-025-0.0-B-QC 3.59E-06 4.39E-04 1.03E-04 2.85E-02 1.32E-03 5.40E-03 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 0.00E+00 1.59E-05 8.80E-03 7.72E-04 4.03E-03 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 0.00E+00 1.49E-04 2.31E-04 1.01E-02 1.72E-04 1.64E-03 0.00E+00 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.68E-03 1.31E-03 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 6.34E-07 1.46E-04 3.64E-05 3.23E-02 0.00E+00 1.49E-03 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 8.18E-05 1.14E-04 7.99E-03 0.00E+00 1.22E-03 5.18E-04 RCA-RXB-CONC-030-0.5-B-QC 4.82E-05 0.00E+00 0.00E+00 2.42E-02 3.56E-04 5.21E-04 4.05E-04 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 2.29E-04 0.00E+00 2.89E-04 0.00E+00 2.28E-03 6.49E-05 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 5.21E-05 1.93E-05 2.39E-03 0.00E+00 4.04E-03 1.70E-04 RCA-RXB-CONC-035-0.0-B-QC 5.74E-06 2.39E-03 1.48E-03 1.72E-02 1.40E-03 7.86E-03 1.18E-03 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.86E-04 3.90E-02 1.90E-03 4.28E-04 1.75E-03 RCA-RXB-CONC-036-0.0-B-QC 2.48E-06 3.30E-03 3.40E-03 3.34E-02 3.39E-05 5.36E-02 0.00E+00 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 2.30E-03 7.44E-04 1.37E-01 6.63E-03 1.88E-01 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 1.15E-04 9.41E-04 1.15E-03 3.81E-02 1.58E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.85E-06 2.40E-04 1.07E-05 6.84E-03 0.00E+00 3.22E-03 0.00E+00 RCA-RXB-CONC-041-0.0-B-QC 0.00E+00 3.76E-04 2.41E-04 1.22E-02 0.00E+00 5.43E-03 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.66E-05 1.73E-04 3.84E-05 2.47E-02 0.00E+00 8.96E-03 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 1.31E-05 1.13E-04 1.56E-04 0.00E+00 0.00E+00 6.99E-03 0.00E+00 RCA-RXB-CONC-048-0.0-B-QC 3.65E-06 1.82E-04 3.65E-04 7.59E-03 0.00E+00 6.45E-03 5.11E-04 75 Percentile Ratio (Ri,Cs-137,k,.75) 1.44E-05 5.45E-04 4.10E-04 3.00E-02 8.02E-04 6.15E-03 1.09E-03 75 Perc. Norm. Ratio (fRAi,k,.75) 1.19E-05 4.52E-04 3.39E-04 2.49E-02 6.65E-04 5.10E-03 9.03E-04 RSCS TSD 25-032 Rev 0 Page 23 of 86

Table 2-14 summarizes the radionuclide activity fractions using the three methods described above for the RXB Population.

Table 2 Radionuclide Activity Fractions for Reactor Building (RXB) Population Using Three Methods Radionuclide Average Activity Fractions, (fAi,j,k,avg)

Normalized 75th Percentile of the Activity Average Fractions, (fAi,k,.75)

Normalized 75th Percentile of the Individual Sample Ratios to Cs-137, (fRAi,k,.75)

Am-241 1.12E-03 7.48E-04 8.82E-04 C-14 8.42E-03 6.77E-03 7.90E-03 Cm-243/244 2.13E-04 9.31E-05 1.01E-04 Co-60 4.87E-02 5.28E-02 5.55E-02 Cs-137 8.53E-01 8.46E-01 8.29E-01 Eu-152 2.93E-04 3.08E-04 2.99E-04 Eu-154 1.44E-04 1.78E-04 2.04E-04 Fe-55 1.91E-02 2.71E-02 2.89E-02 H-3 8.78E-03 5.77E-03 6.48E-03 Mn-54 1.67E-05 2.25E-05 2.56E-05 Nb-94 1.05E-04 1.76E-04 1.95E-04 Ni-63 2.97E-02 3.18E-02 3.86E-02 Np-237 2.35E-05 1.24E-05 1.19E-05 Pu-238 3.73E-04 3.87E-04 4.52E-04 Pu-239/240 2.90E-04 3.08E-04 3.39E-04 Pu-241 2.18E-02 2.06E-02 2.49E-02 Sb-125 4.43E-04 6.71E-04 6.65E-04 Sr-90 6.69E-03 5.22E-03 5.10E-03 Tc-99 7.27E-04 8.37E-04 9.03E-04 2.4.1.1.2 Remainder Population Mixture Fractions A series of 23 concrete samples were evaluated as the Remainder population from buildings/structures other than the Reactor Building (which includes samples from the Base of Stack (BSTK), New Radioactive Waste Pipe Tunnel (NRWT), Reactor Building Ventilation Tunnel (RXBT), Turbine Building (TURB), and the Turbine Building Ventilation Tunnel (TURT). Table 2-15 through Table 2-17 provide the radionuclide activity fractions for all Remainder concrete samples. Table 2-18 through Table 2-20 provide the radionuclide activity ratios to Cs-137 for all Remainder concrete samples.

RSCS TSD 25-032 Rev 0 Page 24 of 86

Table 2 Remainder Concrete Radionuclide Activity Fractions, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-BSTK-CONC-001-0.0-B-QC 7.60E-04 5.99E-03 5.18E-04 2.45E-01 3.41E-01 0.00E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 2.92E-06 0.00E+00 6.55E-07 7.54E-03 3.01E-03 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 4.73E-04 0.00E+00 5.70E-04 2.66E-01 4.32E-01 0.00E+00 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 1.22E-02 7.93E-05 1.78E-02 9.41E-01 0.00E+00 RCA-NRWT-CONC-002-0.5-B-QC 1.27E-03 0.00E+00 8.44E-04 7.37E-03 5.80E-01 1.03E-03 RCA-NRWT-CONC-003-0.0-B-QC 1.19E-03 5.17E-02 0.00E+00 2.27E-02 5.99E-01 2.12E-05 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 1.05E-01 7.01E-01 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 1.75E-03 0.00E+00 0.00E+00 8.16E-02 7.70E-01 2.17E-03 RCA-NRWT-CONC-007-0.0-B-QC 1.13E-05 4.84E-04 1.82E-05 3.11E-01 6.02E-01 0.00E+00 RCA-NRWT-CONC-007-0.5-B-QC 1.80E-04 7.37E-02 0.00E+00 1.79E-03 8.63E-01 2.24E-03 RCA-RXBT-CONC-001-0.0-B-D-QC 2.09E-03 1.56E-01 0.00E+00 6.44E-02 4.85E-01 0.00E+00 RCA-RXBT-CONC-002-0.0-B-QC 1.37E-02 4.53E-01 2.97E-03 1.56E-03 4.56E-02 3.04E-03 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 1.95E-01 0.00E+00 3.50E-02 5.81E-01 8.75E-04 RCA-TURB-CONC-033-0.5-B-I-QC 1.10E-03 7.12E-02 0.00E+00 0.00E+00 3.24E-02 1.01E-03 RCA-TURB-CONC-033-1.0-B-I-QC 1.92E-03 0.00E+00 1.20E-03 0.00E+00 3.68E-03 2.39E-04 RCA-TURB-CONC-033-1.5-B-I-QC 4.70E-03 0.00E+00 0.00E+00 0.00E+00 2.85E-03 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 9.34E-04 1.24E-02 2.97E-04 2.02E-02 5.26E-01 3.08E-03 RCA-TURT-CONC-003-0.0-B-QC 2.86E-03 0.00E+00 7.22E-04 2.60E-02 7.24E-01 2.68E-03 RCA-TURT-CONC-005-0.0-B-QC 2.69E-03 0.00E+00 0.00E+00 1.02E-02 9.50E-01 0.00E+00 RCA-TURT-CONC-005-0.5-B-QC 1.90E-03 3.48E-01 1.10E-03 1.93E-03 2.37E-01 3.11E-03 RCA-TURT-CONC-007-0.0-B-D-QC 1.43E-03 1.40E-01 0.00E+00 3.31E-02 4.93E-01 1.97E-03 RCA-TURT-CONC-007-0.5-B-D-QC 7.20E-03 2.05E-01 1.09E-04 2.00E-03 1.87E-01 3.89E-04 RCA-TURT-CONC-009-0.0-B-QC 3.38E-03 1.24E-01 0.00E+00 5.33E-02 6.52E-01 0.00E+00 Average (fAi,j,k,avg) 2.15E-03 8.04E-02 3.67E-04 5.71E-02 4.67E-01 9.50E-04 75 Percentile Fraction (fi,j,k,.75) 2.39E-03 1.32E-01 5.44E-04 5.89E-02 6.77E-01 2.07E-03 75 Perc. Norm. Frac. (fAi,k,.75) 1.81E-03 1.00E-01 4.13E-04 4.46E-02 5.13E-01 1.57E-03 RSCS TSD 25-032 Rev 0 Page 25 of 86

Table 2 Remainder Concrete Radionuclide Activity Fractions, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-BSTK-CONC-001-0.0-B-QC 2.22E-04 2.67E-01 3.74E-03 3.67E-04 0.00E+00 1.27E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 1.12E-02 1.45E-04 8.16E-06 0.00E+00 9.78E-01 RCA-BSTK-CONC-004-0.0-B-QC 3.95E-04 1.53E-01 0.00E+00 0.00E+00 0.00E+00 6.97E-02 RCA-NRWT-CONC-002-0.0-B-QC 1.24E-04 0.00E+00 2.88E-04 2.29E-05 5.34E-07 1.25E-02 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 2.94E-01 1.82E-02 1.12E-04 1.83E-03 0.00E+00 RCA-NRWT-CONC-003-0.0-B-QC 2.11E-03 8.44E-03 9.98E-03 0.00E+00 0.00E+00 5.98E-02 RCA-NRWT-CONC-005-0.0-B-QC 2.19E-04 1.76E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 9.28E-04 1.83E-02 4.94E-03 1.97E-05 0.00E+00 5.24E-02 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 6.49E-02 0.00E+00 2.12E-04 0.00E+00 1.98E-02 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 2.38E-05 0.00E+00 0.00E+00 RCA-RXBT-CONC-001-0.0-B-D-QC 1.47E-03 6.12E-02 0.00E+00 6.56E-05 2.10E-04 1.03E-01 RCA-RXBT-CONC-002-0.0-B-QC 1.75E-02 0.00E+00 1.80E-01 0.00E+00 3.10E-03 0.00E+00 RCA-RXBT-CONC-003-0.0-B-QC 3.61E-03 0.00E+00 2.63E-02 5.86E-05 6.20E-04 1.48E-01 RCA-TURB-CONC-033-0.5-B-I-QC 7.90E-04 5.12E-02 6.32E-01 2.06E-05 2.03E-04 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 0.00E+00 4.76E-01 0.00E+00 3.28E-04 3.14E-01 RCA-TURB-CONC-033-1.5-B-I-QC 4.92E-04 7.43E-02 5.64E-02 3.87E-05 3.59E-04 1.17E-01 RCA-TURT-CONC-001-0.0-B-QC 0.00E+00 3.71E-01 0.00E+00 4.89E-06 0.00E+00 6.18E-02 RCA-TURT-CONC-003-0.0-B-QC 2.23E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.87E-01 RCA-TURT-CONC-005-0.0-B-QC 2.19E-03 0.00E+00 0.00E+00 1.26E-04 0.00E+00 1.37E-02 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 1.78E-02 3.77E-02 0.00E+00 0.00E+00 3.02E-01 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 0.00E+00 6.68E-02 3.44E-04 7.26E-04 2.21E-01 RCA-TURT-CONC-007-0.5-B-D-QC 1.31E-03 2.00E-01 0.00E+00 4.85E-05 0.00E+00 2.85E-01 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 3.77E-04 1.44E-01 Average (fAi,j,k,avg) 1.46E-03 7.69E-02 6.58E-02 6.41E-05 3.37E-04 1.40E-01 75 Percentile Fraction (fi,j,k,.75) 1.39E-03 1.14E-01 3.20E-02 6.21E-05 3.43E-04 1.67E-01 75 Perc. Norm. Frac. (fAi,k,.75) 1.06E-03 8.62E-02 2.42E-02 4.71E-05 2.60E-04 1.27E-01 RSCS TSD 25-032 Rev 0 Page 26 of 86

Table 2 Remainder Concrete Radionuclide Activity Fractions, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-BSTK-CONC-001-0.0-B-QC 0.00E+00 3.49E-04 2.51E-04 0.00E+00 3.68E-05 4.11E-03 3.09E-03 RCA-BSTK-CONC-003-0.0-B-D-QC 9.34E-07 1.53E-06 8.00E-07 0.00E+00 0.00E+00 3.89E-05 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 8.55E-05 9.32E-04 0.00E+00 4.69E-02 0.00E+00 1.81E-02 1.22E-02 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.46E-05 1.56E-02 2.00E-04 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 8.04E-04 1.90E-03 8.10E-02 0.00E+00 0.00E+00 1.17E-02 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 0.00E+00 1.19E-03 2.27E-01 3.30E-04 1.65E-02 2.43E-04 RCA-NRWT-CONC-005-0.0-B-QC 5.65E-04 6.00E-04 4.91E-04 0.00E+00 6.32E-04 9.04E-03 6.09E-03 RCA-NRWT-CONC-006-0.0-B-QC 5.77E-06 2.48E-05 1.77E-04 6.54E-02 0.00E+00 2.20E-03 0.00E+00 RCA-NRWT-CONC-007-0.0-B-QC 1.88E-06 0.00E+00 1.15E-05 4.65E-04 0.00E+00 1.10E-03 5.90E-04 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.43E-02 1.96E-03 2.15E-02 1.36E-03 RCA-RXBT-CONC-001-0.0-B-D-QC 0.00E+00 3.99E-04 1.16E-03 1.15E-01 1.23E-03 5.96E-03 2.60E-03 RCA-RXBT-CONC-002-0.0-B-QC 0.00E+00 2.93E-03 4.68E-03 2.63E-01 5.29E-03 0.00E+00 3.51E-03 RCA-RXBT-CONC-003-0.0-B-QC 2.61E-05 5.79E-04 0.00E+00 0.00E+00 0.00E+00 9.74E-03 0.00E+00 RCA-TURB-CONC-033-0.5-B-I-QC 0.00E+00 1.24E-03 2.77E-03 2.06E-01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 1.34E-04 2.01E-03 2.99E-05 2.00E-01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.5-B-I-QC 6.44E-05 1.28E-03 1.52E-03 7.39E-01 1.70E-04 1.28E-03 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.59E-04 6.78E-04 7.96E-04 0.00E+00 0.00E+00 6.22E-04 2.16E-03 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 6.36E-04 1.63E-04 4.47E-02 0.00E+00 9.21E-03 0.00E+00 RCA-TURT-CONC-005-0.0-B-QC 1.13E-04 2.33E-04 1.83E-03 0.00E+00 0.00E+00 1.34E-02 5.59E-03 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 2.59E-03 0.00E+00 1.52E-02 2.25E-03 6.62E-03 2.28E-02 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 5.10E-04 2.00E-03 8.31E-03 6.06E-03 1.92E-02 6.56E-03 RCA-TURT-CONC-007-0.5-B-D-QC 0.00E+00 9.98E-05 4.70E-04 1.06E-01 1.39E-03 0.00E+00 4.22E-03 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 1.33E-03 1.43E-03 2.26E-03 1.62E-03 1.24E-02 3.30E-03 Average (fAi,j,k,avg) 5.02E-05 7.49E-04 9.08E-04 9.37E-02 9.15E-04 7.24E-03 3.75E-03 75 Percentile Fraction (fi,j,k,.75) 4.53E-05 1.08E-03 1.48E-03 1.10E-01 1.31E-03 1.29E-02 4.90E-03 75 Perc. Norm. Frac. (fAi,k,.75) 3.43E-05 8.22E-04 1.12E-03 8.36E-02 9.91E-04 9.78E-03 3.72E-03 RSCS TSD 25-032 Rev 0 Page 27 of 86

Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-BSTK-CONC-001-0.0-B-QC 2.22E-03 1.75E-02 1.52E-03 7.18E-01 1.00E+00 0.00E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 9.69E-04 0.00E+00 2.17E-04 2.50E+00 1.00E+00 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 1.09E-03 0.00E+00 1.32E-03 6.16E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 1.29E-02 8.42E-05 1.89E-02 1.00E+00 0.00E+00 RCA-NRWT-CONC-002-0.5-B-QC 2.19E-03 0.00E+00 1.46E-03 1.27E-02 1.00E+00 1.78E-03 RCA-NRWT-CONC-003-0.0-B-QC 1.99E-03 8.64E-02 0.00E+00 3.79E-02 1.00E+00 3.54E-05 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 1.50E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 2.27E-03 0.00E+00 0.00E+00 1.06E-01 1.00E+00 2.81E-03 RCA-NRWT-CONC-007-0.0-B-QC 1.89E-05 8.04E-04 3.02E-05 5.16E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-007-0.5-B-QC 2.09E-04 8.54E-02 0.00E+00 2.07E-03 1.00E+00 2.59E-03 RCA-RXBT-CONC-001-0.0-B-D-QC 4.30E-03 3.21E-01 0.00E+00 1.33E-01 1.00E+00 0.00E+00 RCA-RXBT-CONC-002-0.0-B-QC 3.00E-01 9.92E+00 6.51E-02 3.43E-02 1.00E+00 6.66E-02 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 3.35E-01 0.00E+00 6.02E-02 1.00E+00 1.51E-03 RCA-TURB-CONC-033-0.5-B-I-QC 3.41E-02 2.20E+00 0.00E+00 0.00E+00 1.00E+00 3.11E-02 RCA-TURB-CONC-033-1.0-B-I-QC 5.23E-01 0.00E+00 3.26E-01 0.00E+00 1.00E+00 6.49E-02 RCA-TURB-CONC-033-1.5-B-I-QC 1.65E+00 0.00E+00 0.00E+00 0.00E+00 1.00E+00 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.78E-03 2.35E-02 5.65E-04 3.85E-02 1.00E+00 5.86E-03 RCA-TURT-CONC-003-0.0-B-QC 3.95E-03 0.00E+00 9.98E-04 3.60E-02 1.00E+00 3.70E-03 RCA-TURT-CONC-005-0.0-B-QC 2.84E-03 0.00E+00 0.00E+00 1.07E-02 1.00E+00 0.00E+00 RCA-TURT-CONC-005-0.5-B-QC 8.03E-03 1.47E+00 4.65E-03 8.15E-03 1.00E+00 1.31E-02 RCA-TURT-CONC-007-0.0-B-D-QC 2.90E-03 2.84E-01 0.00E+00 6.71E-02 1.00E+00 4.00E-03 RCA-TURT-CONC-007-0.5-B-D-QC 3.84E-02 1.09E+00 5.79E-04 1.06E-02 1.00E+00 2.08E-03 RCA-TURT-CONC-009-0.0-B-QC 5.19E-03 1.91E-01 0.00E+00 8.18E-02 1.00E+00 0.00E+00 75 Percentile Ratio (Ri,Cs-137,k,.75) 6.61E-03 3.03E-01 1.16E-03 1.19E-01 1.00E+00 3.85E-03 75 Perc. Norm. Ratio (fRAi,k,.75) 2.28E-03 1.05E-01 4.00E-04 4.12E-02 3.45E-01 1.33E-03 RSCS TSD 25-032 Rev 0 Page 28 of 86

Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-BSTK-CONC-001-0.0-B-QC 6.49E-04 7.82E-01 1.09E-02 1.08E-03 0.00E+00 3.72E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 3.72E+00 4.82E-02 2.71E-03 0.00E+00 3.25E+02 RCA-BSTK-CONC-004-0.0-B-QC 9.15E-04 3.55E-01 0.00E+00 0.00E+00 0.00E+00 1.61E-01 RCA-NRWT-CONC-002-0.0-B-QC 1.31E-04 0.00E+00 3.06E-04 2.44E-05 5.68E-07 1.33E-02 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 5.08E-01 3.14E-02 1.94E-04 3.15E-03 0.00E+00 RCA-NRWT-CONC-003-0.0-B-QC 3.53E-03 1.41E-02 1.67E-02 0.00E+00 0.00E+00 1.00E-01 RCA-NRWT-CONC-005-0.0-B-QC 3.13E-04 2.51E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 1.20E-03 2.37E-02 6.42E-03 2.56E-05 0.00E+00 6.81E-02 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 1.08E-01 0.00E+00 3.51E-04 0.00E+00 3.30E-02 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 2.76E-05 0.00E+00 0.00E+00 RCA-RXBT-CONC-001-0.0-B-D-QC 3.03E-03 1.26E-01 0.00E+00 1.35E-04 4.32E-04 2.12E-01 RCA-RXBT-CONC-002-0.0-B-QC 3.84E-01 0.00E+00 3.96E+00 0.00E+00 6.79E-02 0.00E+00 RCA-RXBT-CONC-003-0.0-B-QC 6.21E-03 0.00E+00 4.52E-02 1.01E-04 1.07E-03 2.54E-01 RCA-TURB-CONC-033-0.5-B-I-QC 2.44E-02 1.58E+00 1.95E+01 6.34E-04 6.26E-03 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 0.00E+00 1.29E+02 0.00E+00 8.91E-02 8.53E+01 RCA-TURB-CONC-033-1.5-B-I-QC 1.73E-01 2.61E+01 1.98E+01 1.36E-02 1.26E-01 4.12E+01 RCA-TURT-CONC-001-0.0-B-QC 0.00E+00 7.07E-01 0.00E+00 9.31E-06 0.00E+00 1.18E-01 RCA-TURT-CONC-003-0.0-B-QC 3.08E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.58E-01 RCA-TURT-CONC-005-0.0-B-QC 2.31E-03 0.00E+00 0.00E+00 1.33E-04 0.00E+00 1.45E-02 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 7.52E-02 1.59E-01 0.00E+00 0.00E+00 1.27E+00 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 0.00E+00 1.36E-01 6.98E-04 1.47E-03 4.48E-01 RCA-TURT-CONC-007-0.5-B-D-QC 7.00E-03 1.07E+00 0.00E+00 2.59E-04 0.00E+00 1.52E+00 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 5.79E-04 2.21E-01 75 Percentile Ratio (Ri,Cs-137,k,.75) 3.30E-03 6.07E-01 9.20E-02 3.05E-04 1.27E-03 4.10E-01 75 Perc. Norm. Ratio (fRAi,k,.75) 1.14E-03 2.10E-01 3.17E-02 1.05E-04 4.39E-04 1.41E-01 RSCS TSD 25-032 Rev 0 Page 29 of 86

Table 2 Remainder Concrete Radionuclide Activity Ratios to Cs-137, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-BSTK-CONC-001-0.0-B-QC 0.00E+00 1.02E-03 7.35E-04 0.00E+00 1.08E-04 1.20E-02 9.04E-03 RCA-BSTK-CONC-003-0.0-B-D-QC 3.10E-04 5.09E-04 2.66E-04 0.00E+00 0.00E+00 1.29E-02 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 1.98E-04 2.16E-03 0.00E+00 1.09E-01 0.00E+00 4.20E-02 2.83E-02 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.86E-05 1.66E-02 2.13E-04 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 1.39E-03 3.28E-03 1.40E-01 0.00E+00 0.00E+00 2.01E-02 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 0.00E+00 1.99E-03 3.79E-01 5.51E-04 2.76E-02 4.06E-04 RCA-NRWT-CONC-005-0.0-B-QC 8.05E-04 8.56E-04 7.00E-04 0.00E+00 9.02E-04 1.29E-02 8.69E-03 RCA-NRWT-CONC-006-0.0-B-QC 7.49E-06 3.22E-05 2.30E-04 8.49E-02 0.00E+00 2.85E-03 0.00E+00 RCA-NRWT-CONC-007-0.0-B-QC 3.12E-06 0.00E+00 1.91E-05 7.72E-04 0.00E+00 1.84E-03 9.80E-04 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.97E-02 2.28E-03 2.49E-02 1.58E-03 RCA-RXBT-CONC-001-0.0-B-D-QC 0.00E+00 8.22E-04 2.39E-03 2.37E-01 2.53E-03 1.23E-02 5.35E-03 RCA-RXBT-CONC-002-0.0-B-QC 0.00E+00 6.42E-02 1.03E-01 5.77E+00 1.16E-01 0.00E+00 7.70E-02 RCA-RXBT-CONC-003-0.0-B-QC 4.49E-05 9.97E-04 0.00E+00 0.00E+00 0.00E+00 1.68E-02 0.00E+00 RCA-TURB-CONC-033-0.5-B-I-QC 0.00E+00 3.82E-02 8.54E-02 6.36E+00 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 3.64E-02 5.47E-01 8.12E-03 5.44E+01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.5-B-I-QC 2.26E-02 4.50E-01 5.34E-01 2.59E+02 5.96E-02 4.50E-01 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 3.02E-04 1.29E-03 1.52E-03 0.00E+00 0.00E+00 1.18E-03 4.11E-03 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 8.78E-04 2.24E-04 6.17E-02 0.00E+00 1.27E-02 0.00E+00 RCA-TURT-CONC-005-0.0-B-QC 1.19E-04 2.45E-04 1.93E-03 0.00E+00 0.00E+00 1.41E-02 5.89E-03 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 1.09E-02 0.00E+00 6.40E-02 9.50E-03 2.79E-02 9.63E-02 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 1.04E-03 4.07E-03 1.69E-02 1.23E-02 3.90E-02 1.33E-02 RCA-TURT-CONC-007-0.5-B-D-QC 0.00E+00 5.32E-04 2.51E-03 5.63E-01 7.39E-03 0.00E+00 2.25E-02 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 2.04E-03 2.20E-03 3.46E-03 2.49E-03 1.91E-02 5.06E-03 75 Percentile Ratio (Ri,Cs-137,k,.75) 1.58E-04 2.10E-03 2.89E-03 3.08E-01 2.51E-03 2.20E-02 1.12E-02 75 Perc. Norm. Ratio (fRAi,k,.75) 5.46E-05 7.24E-04 9.99E-04 1.06E-01 8.67E-04 7.59E-03 3.86E-03 RSCS TSD 25-032 Rev 0 Page 30 of 86

Table 2-21 summarizes the radionuclide activity fractions using the three methods described above for the Remainder Population.

Table 2 Radionuclide Activity Fractions for Remainder Population Using Three Methods Radionuclide Average Activity Fractions, (fAi,j,k,avg)

Normalized 75th Percentile of the Activity Average Fractions, (fAi,k,.75)

Normalized 75th Percentile of the Individual Sample Ratios to Cs-137, (fRAi,k,.75)

Am-241 2.15E-03 1.81E-03 2.28E-03 C-14 8.04E-02 1.00E-01 1.05E-01 Cm-243/244 3.67E-04 4.13E-04 4.00E-04 Co-60 5.71E-02 4.46E-02 4.12E-02 Cs-137 4.67E-01 5.13E-01 3.45E-01 Eu-152 9.50E-04 1.57E-03 1.33E-03 Eu-154 1.46E-03 1.06E-03 1.14E-03 Fe-55 7.69E-02 8.62E-02 2.10E-01 H-3 6.58E-02 2.42E-02 3.17E-02 Mn-54 6.41E-05 4.71E-05 1.05E-04 Nb-94 3.37E-04 2.60E-04 4.39E-04 Ni-63 1.40E-01 1.27E-01 1.41E-01 Np-237 5.02E-05 3.43E-05 5.46E-05 Pu-238 7.49E-04 8.22E-04 7.24E-04 Pu-239/240 9.08E-04 1.12E-03 9.99E-04 Pu-241 9.37E-02 8.36E-02 1.06E-01 Sb-125 9.15E-04 9.91E-04 8.67E-04 Sr-90 7.24E-03 9.78E-03 7.59E-03 Tc-99 3.75E-03 3.72E-03 3.86E-03 RSCS TSD 25-032 Rev 0 Page 31 of 86

For comparison, the activity fraction evaluations were also performed with an entire All Samples population where the RXB and Remainder populations were combined into a single population. It was concluded that the RXB and Remainder populations were unique and would be retained for the IC dose evaluation. Table 2-22 shows the results of the All Samples activity fraction evaluation. The activity fractions for the entire population are also provided in.2.

Table 2 Radionuclide Activity Fractions for All Samples Population Using Three Methods Radionuclide Average Activity Fractions, (fAi,j,k,avg)

Normalized 75th Percentile of the Activity Average Fractions, (fAi,k,.75)

Normalized 75th Percentile of the Individual Sample Ratios to Cs-137, (fRAi,k,.75)

Am-241 1.53E-03 1.38E-03 2.03E-03 C-14 3.70E-02 1.92E-02 1.78E-02 Cm-243/244 2.74E-04 1.60E-04 2.24E-04 Co-60 5.20E-02 4.89E-02 7.02E-02 Cs-137 7.00E-01 7.79E-01 7.03E-01 Eu-152 5.53E-04 5.28E-04 1.00E-03 Eu-154 6.66E-04 3.80E-04 4.65E-04 Fe-55 4.20E-02 4.31E-02 6.01E-02 H-3 3.14E-02 8.46E-03 1.20E-02 Mn-54 3.55E-05 2.70E-05 3.60E-05 Nb-94 1.97E-04 1.73E-04 2.10E-04 Ni-63 7.33E-02 6.03E-02 8.08E-02 Np-237 3.41E-05 1.25E-05 2.37E-05 Pu-238 5.22E-04 6.04E-04 7.13E-04 Pu-239/240 5.35E-04 5.26E-04 9.81E-04 Pu-241 5.03E-02 2.81E-02 3.95E-02 Sb-125 6.30E-04 6.79E-04 9.02E-04 Sr-90 6.91E-03 6.88E-03 9.03E-03 Tc-99 1.93E-03 1.33E-03 1.51E-03 RSCS TSD 25-032 Rev 0 Page 32 of 86

2.4.2 Insignificant Contributors to Dose and Radionuclides of Concern NUREG-1757, Vol. 2, Rev. 2 (NRC, 2022) defines radionuclides as insignificant contributors (IC) to dose if the sum of the dose from the group of ICs is less than 10% of the total dose from all radionuclides combined. The ICs can be eliminated from further detailed consideration in the LTP and FSS. However, the dose contribution from the ICs must be accounted for final compliance purposes. The radionuclides remaining after the removal of ICs are the FSS ROCs for OCS.

The FSS ROCs were selected to ensure that sufficient margin has been attributed to the estimated dose contribution from the insignificant radionuclides. This decreases the risk of having to recalculate the IC dose for compliance. The Relative Dose Fraction, RDFi,k, for nuclide i and population k is calculated using the applicable DCGLs from Attachment 5.3, Table 5-10, the nuclide mixture fractions from Section 2.4.1, and Equation 6 below.

,=

1

(),

Equation 6 For comparison, the RDFi,k, will be calculated using both the normalized 75th percentile of the activity average fractions, (fAi,k,.75) and the normalized 75th percentile of the individual sample ratios to Cs-137, (fRAi,k,.75) as the fAi,k term in Equation 6.

A summary of the 4 DCGL categories evaluated in this TSD is provided in Table 2-23, and the values of i,k are listed in Table 5-10. It should be noted that when two radionuclides were reported per analysis (e.g., Cm-243/244 or Pu-239/240) the most limiting DCGL for each pair was selected for use in Equation 6.

Table 2 List of DCGLs Evaluated in this TSD Concrete Industrial Use DCGL (pCi/m2)

Soil Industrial Use DCGL (pCi/g)

Buried Pipe (BP) Industrial Use DCGL (pCi/m2)

Embedded Pipe (EP) Industrial Use DCGL (pCi/m2)

The results of the RDF calculations are provided in Table 2-24 through Table 2-37. The tables show the dose fractions for each sample population along with the associated mixture fraction.

For each sample population, the normalized 75th percentile mixture fraction and the 75th percentile of the normalized Cs-137 ratios are evaluated. The tables indicate if a radionuclide is considered as a possible FSS ROC, and Section 2.4.3 describes how the RDFi,k results were evaluated to establish a finalized set of FSS ROCs for each scenario that result in an aggregate IC dose of less than 10% of the total dose.

RSCS TSD 25-032 Rev 0 Page 33 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Concrete Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Concrete Industrial Use RDF Am-241 7.48E-04 3.53E-05 C-14 6.77E-03 7.31E-04 Cm-243/244 9.31E-05 1.70E-05 Co-60 Y

5.28E-02 2.19E-01 Cs-137 Y

8.46E-01 7.78E-01 Eu-152 3.08E-04 5.76E-04 Eu-154 1.78E-04 3.60E-04 Fe-55 2.71E-02 1.11E-07 H-3 5.77E-03 3.70E-06 Mn-54 2.25E-05 2.18E-05 Nb-94 1.76E-04 4.76E-04 Ni-63 3.18E-02 1.39E-07 Np-237 1.24E-05 7.27E-06 Pu-238 3.87E-04 1.25E-04 Pu-239/240 3.08E-04 1.36E-04 Pu-241 2.06E-02 1.46E-04 Sb-125 6.71E-04 3.97E-04 Sr-90 5.22E-03 4.07E-05 Tc-99 8.37E-04 2.00E-06 Sum 1.00E+00 ROC Dose Fraction 9.969E-01 IC Dose Fraction 3.075E-03 RSCS TSD 25-032 Rev 0 Page 34 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Concrete Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Concrete Industrial Use RDF Am-241 8.82E-04 4.19E-05 C-14 7.90E-03 8.58E-04 Cm-243/244 1.01E-04 1.85E-05 Co-60 Y

5.55E-02 2.31E-01 Cs-137 Y

8.29E-01 7.66E-01 Eu-152 2.99E-04 5.61E-04 Eu-154 2.04E-04 4.14E-04 Fe-55 2.89E-02 1.19E-07 H-3 6.48E-03 4.17E-06 Mn-54 2.56E-05 2.48E-05 Nb-94 1.95E-04 5.30E-04 Ni-63 3.86E-02 1.70E-07 Np-237 1.19E-05 7.04E-06 Pu-238 4.52E-04 1.46E-04 Pu-239/240 3.39E-04 1.51E-04 Pu-241 2.49E-02 1.78E-04 Sb-125 6.65E-04 3.95E-04 Sr-90 5.10E-03 4.00E-05 Tc-99 9.03E-04 2.17E-06 Sum 1.00E+00 ROC Dose Fraction 9.966E-01 IC Dose Fraction 3.372E-03 RSCS TSD 25-032 Rev 0 Page 35 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Concrete Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Concrete Industrial Use RDF Am-241 1.81E-03 1.27E-04 C-14 1.00E-01 1.60E-02 Cm-243/244 4.13E-04 1.11E-04 Co-60 Y

4.46E-02 2.74E-01 Cs-137 Y

5.13E-01 6.98E-01 Eu-152 1.57E-03 4.34E-03 Eu-154 1.06E-03 3.15E-03 Fe-55 8.62E-02 5.22E-07 H-3 2.42E-02 2.30E-05 Mn-54 4.71E-05 6.73E-05 Nb-94 2.60E-04 1.04E-03 Ni-63 1.27E-01 8.19E-07 Np-237 3.43E-05 2.98E-05 Pu-238 8.22E-04 3.92E-04 Pu-239/240 1.12E-03 7.32E-04 Pu-241 8.36E-02 8.81E-04 Sb-125 9.91E-04 8.68E-04 Sr-90 9.78E-03 1.13E-04 Tc-99 3.72E-03 1.31E-05 Sum 1.00E+00 ROC Dose Fraction 9.721E-01 IC Dose Fraction 2.792E-02 RSCS TSD 25-032 Rev 0 Page 36 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Concrete Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Concrete Industrial Use RDF Am-241 2.28E-03 2.12E-04 C-14 1.05E-01 2.22E-02 Cm-243/244 4.00E-04 1.43E-04 Co-60 Y

4.12E-02 3.36E-01 Cs-137 Y

3.45E-01 6.25E-01 Eu-152 1.33E-03 4.90E-03 Eu-154 1.14E-03 4.53E-03 Fe-55 2.10E-01 1.69E-06 H-3 3.17E-02 4.01E-05 Mn-54 1.05E-04 2.00E-04 Nb-94 4.39E-04 2.34E-03 Ni-63 1.41E-01 1.22E-06 Np-237 5.46E-05 6.31E-05 Pu-238 7.24E-04 4.60E-04 Pu-239/240 9.99E-04 8.69E-04 Pu-241 1.06E-01 1.49E-03 Sb-125 8.67E-04 1.01E-03 Sr-90 7.59E-03 1.17E-04 Tc-99 3.86E-03 1.81E-05 Sum 1.00E+00 ROC Dose Fraction 9.614E-01 IC Dose Fraction 3.863E-02 RSCS TSD 25-032 Rev 0 Page 37 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Soil Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Soil Industrial Use RDF Am-241 1.81E-03 1.23E-04 C-14 1.00E-01 2.39E-03 Cm-243/244 4.13E-04 1.13E-04 Co-60 Y

4.46E-02 2.78E-01 Cs-137 Y

5.13E-01 7.09E-01 Eu-152 1.57E-03 4.41E-03 Eu-154 1.06E-03 3.20E-03 Fe-55 8.62E-02 5.09E-07 H-3 2.42E-02 2.39E-05 Mn-54 4.71E-05 6.83E-05 Nb-94 2.60E-04 1.03E-03 Ni-63 1.27E-01 8.09E-07 Np-237 3.43E-05 2.95E-05 Pu-238 8.22E-04 3.57E-05 Pu-239/240 1.12E-03 1.90E-04 Pu-241 8.36E-02 1.66E-04 Sb-125 9.91E-04 8.82E-04 Sr-90 9.78E-03 1.14E-04 Tc-99 3.72E-03 1.34E-05 Sum 1.00E+00 ROC Dose Fraction 9.872E-01 IC Dose Fraction 1.280E-02 RSCS TSD 25-032 Rev 0 Page 38 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Soil Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Soil Industrial Use RDF Am-241 2.28E-03 2.07E-04 C-14 1.05E-01 3.34E-03 Cm-243/244 4.00E-04 1.46E-04 Co-60 Y

4.12E-02 3.44E-01 Cs-137 Y

3.45E-01 6.39E-01 Eu-152 1.33E-03 5.00E-03 Eu-154 1.14E-03 4.63E-03 Fe-55 2.10E-01 1.65E-06 H-3 3.17E-02 4.19E-05 Mn-54 1.05E-04 2.05E-04 Nb-94 4.39E-04 2.32E-03 Ni-63 1.41E-01 1.21E-06 Np-237 5.46E-05 6.29E-05 Pu-238 7.24E-04 4.21E-05 Pu-239/240 9.99E-04 2.27E-04 Pu-241 1.06E-01 2.82E-04 Sb-125 8.67E-04 1.03E-03 Sr-90 7.59E-03 1.19E-04 Tc-99 3.86E-03 1.86E-05 Sum 1.00E+00 ROC Dose Fraction 9.823E-01 IC Dose Fraction 1.769E-02 RSCS TSD 25-032 Rev 0 Page 39 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Buried Pipe Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Buried Pipe Industrial Use RDF Am-241 7.48E-04 1.68E-03 C-14 Y

6.77E-03 5.31E-01 Cm-243/244 9.31E-05 5.53E-05 Co-60 Y

5.28E-02 1.01E-03 Cs-137 Y

8.46E-01 2.32E-01 Eu-152 3.08E-04 2.79E-06 Eu-154 1.78E-04 1.95E-06 Fe-55 2.71E-02 5.28E-07 H-3 5.77E-03 9.66E-08 Mn-54 2.25E-05 1.88E-08 Nb-94 1.76E-04 4.77E-07 Ni-63 3.18E-02 6.96E-06 Np-237 1.24E-05 1.35E-04 Pu-238 Y

3.87E-04 8.94E-02 Pu-239/240 Y

3.08E-04 9.58E-02 Pu-241 2.06E-02 4.88E-02 Sb-125 6.71E-04 2.26E-04 Sr-90 5.22E-03 6.12E-04 Tc-99 8.37E-04 9.04E-06 Sum 1.00E+00 ROC Dose Fraction 9.484E-01 IC Dose Fraction 5.158E-02 RSCS TSD 25-032 Rev 0 Page 40 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Buried Pipe Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Buried Pipe Industrial Use RDF Am-241 8.82E-04 1.77E-03 C-14 Y

7.90E-03 5.53E-01 Cm-243/244 1.01E-04 5.35E-05 Co-60 Y

5.55E-02 9.45E-04 Cs-137 Y

8.29E-01 2.02E-01 Eu-152 2.99E-04 2.42E-06 Eu-154 2.04E-04 2.00E-06 Fe-55 2.89E-02 5.03E-07 H-3 6.48E-03 9.68E-08 Mn-54 2.56E-05 1.90E-08 Nb-94 1.95E-04 4.72E-07 Ni-63 3.86E-02 7.54E-06 Np-237 1.19E-05 1.16E-04 Pu-238 Y

4.52E-04 9.33E-02 Pu-239/240 Y

3.39E-04 9.44E-02 Pu-241 2.49E-02 5.27E-02 Sb-125 6.65E-04 2.00E-04 Sr-90 5.10E-03 5.34E-04 Tc-99 9.03E-04 8.70E-06 Sum 1.00E+00 ROC Dose Fraction 9.446E-01 IC Dose Fraction 5.541E-02 RSCS TSD 25-032 Rev 0 Page 41 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Buried Pipe Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Buried Pipe Industrial Use RDF Am-241 1.81E-03 4.66E-04 C-14 Y

1.00E-01 8.99E-01 Cm-243/244 4.13E-04 2.81E-05 Co-60 Y

4.46E-02 9.75E-05 Cs-137 Y

5.13E-01 1.61E-02 Eu-152 1.57E-03 1.63E-06 Eu-154 1.06E-03 1.32E-06 Fe-55 8.62E-02 1.93E-07 H-3 2.42E-02 4.64E-08 Mn-54 4.71E-05 4.49E-09 Nb-94 2.60E-04 8.09E-08 Ni-63 1.27E-01 3.17E-06 Np-237 3.43E-05 4.27E-05 Pu-238 8.22E-04 2.18E-02 Pu-239/240 1.12E-03 3.99E-02 Pu-241 8.36E-02 2.27E-02 Sb-125 9.91E-04 3.82E-05 Sr-90 9.78E-03 1.31E-04 Tc-99 3.72E-03 4.59E-06 Sum 1.00E+00 ROC Dose Fraction 9.149E-01 IC Dose Fraction 8.513E-02 RSCS TSD 25-032 Rev 0 Page 42 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Buried Pipe Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Buried Pipe Industrial Use RDF Am-241 2.28E-03 5.68E-04 C-14 Y

1.05E-01 9.08E-01 Cm-243/244 4.00E-04 2.63E-05 Co-60 Y

4.12E-02 8.71E-05 Cs-137 Y

3.45E-01 1.05E-02 Eu-152 1.33E-03 1.33E-06 Eu-154 1.14E-03 1.38E-06 Fe-55 2.10E-01 4.53E-07 H-3 3.17E-02 5.88E-08 Mn-54 1.05E-04 9.72E-09 Nb-94 4.39E-04 1.32E-07 Ni-63 1.41E-01 3.42E-06 Np-237 5.46E-05 6.58E-05 Pu-238 7.24E-04 1.86E-02 Pu-239/240 9.99E-04 3.45E-02 Pu-241 1.06E-01 2.80E-02 Sb-125 8.67E-04 3.23E-05 Sr-90 7.59E-03 9.86E-05 Tc-99 3.86E-03 4.61E-06 Sum 1.00E+00 ROC Dose Fraction 9.182E-01 IC Dose Fraction 8.182E-02 RSCS TSD 25-032 Rev 0 Page 43 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles, Embedded Pipe Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Embedded Pipe Industrial Use RDF Am-241 7.48E-04 1.49E-03 C-14 Y

6.77E-03 7.58E-01 Cm-243/244 9.31E-05 8.95E-05 Co-60 Y

5.28E-02 2.67E-04 Cs-137 Y

8.46E-01 7.68E-02 Eu-152 3.08E-04 9.38E-07 Eu-154 1.78E-04 5.55E-07 Fe-55 2.71E-02 1.18E-07 H-3 5.77E-03 3.37E-07 Mn-54 2.25E-05 3.74E-09 Nb-94 1.76E-04 4.88E-07 Ni-63 3.18E-02 6.99E-06 Np-237 1.24E-05 2.09E-04 Pu-238 3.87E-04 5.34E-02 Pu-239/240 Y

3.08E-04 1.09E-01 Pu-241 2.06E-02 1.87E-04 Sb-125 6.71E-04 5.22E-06 Sr-90 5.22E-03 4.52E-04 Tc-99 8.37E-04 3.27E-05 Sum 1.00E+00 ROC Dose Fraction 9.441E-01 IC Dose Fraction 5.587E-02 RSCS TSD 25-032 Rev 0 Page 44 of 86

Table 2 Relative Dose Fractions, RDFi,k, RXB Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Embedded Pipe Industrial Use DCGL Scenario Radionuclide ROC?

RXB Mix Fraction Embedded Pipe Industrial Use RDF Am-241 8.82E-04 1.53E-03 C-14 Y

7.90E-03 7.72E-01 Cm-243/244 1.01E-04 8.47E-05 Co-60 Y

5.55E-02 2.45E-04 Cs-137 Y

8.29E-01 6.56E-02 Eu-152 2.99E-04 7.94E-07 Eu-154 2.04E-04 5.55E-07 Fe-55 2.89E-02 1.10E-07 H-3 6.48E-03 3.30E-07 Mn-54 2.56E-05 3.71E-09 Nb-94 1.95E-04 4.71E-07 Ni-63 3.86E-02 7.41E-06 Np-237 1.19E-05 1.75E-04 Pu-238 4.52E-04 5.44E-02 Pu-239/240 Y

3.39E-04 1.05E-01 Pu-241 2.49E-02 1.97E-04 Sb-125 6.65E-04 4.51E-06 Sr-90 5.10E-03 3.85E-04 Tc-99 9.03E-04 3.08E-05 Sum 1.00E+00 ROC Dose Fraction 9.432E-01 IC Dose Fraction 5.684E-02 RSCS TSD 25-032 Rev 0 Page 45 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles, Embedded Pipe Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Embedded Pipe Industrial Use RDF Am-241 1.81E-03 3.06E-04 C-14 Y

1.00E-01 9.52E-01 Cm-243/244 4.13E-04 3.37E-05 Co-60 Y

4.46E-02 1.92E-05 Cs-137 Y

5.13E-01 3.95E-03 Eu-152 1.57E-03 4.06E-07 Eu-154 1.06E-03 2.79E-07 Fe-55 8.62E-02 3.19E-08 H-3 2.42E-02 1.20E-07 Mn-54 4.71E-05 6.64E-10 Nb-94 2.60E-04 6.13E-08 Ni-63 1.27E-01 2.36E-06 Np-237 3.43E-05 4.90E-05 Pu-238 8.22E-04 9.64E-03 Pu-239/240 1.12E-03 3.38E-02 Pu-241 8.36E-02 6.45E-05 Sb-125 9.91E-04 6.54E-07 Sr-90 9.78E-03 7.19E-05 Tc-99 3.72E-03 1.23E-05 Sum 1.00E+00 ROC Dose Fraction 9.560E-01 IC Dose Fraction 4.400E-02 RSCS TSD 25-032 Rev 0 Page 46 of 86

Table 2 Relative Dose Fractions, RDFi,k, Remainder Mix Fraction, Using Normalized 75th Percentiles of the Nuclide Ratios to Cs-137, Embedded Pipe Industrial Use DCGL Scenario Radionuclide ROC?

Remainder Mix Fraction Embedded Pipe Industrial Use RDF Am-241 2.28E-03 3.72E-04 C-14 Y

1.05E-01 9.59E-01 Cm-243/244 4.00E-04 3.16E-05 Co-60 Y

4.12E-02 1.71E-05 Cs-137 Y

3.45E-01 2.57E-03 Eu-152 1.33E-03 3.32E-07 Eu-154 1.14E-03 2.91E-07 Fe-55 2.10E-01 7.49E-08 H-3 3.17E-02 1.52E-07 Mn-54 1.05E-04 1.43E-09 Nb-94 4.39E-04 9.97E-08 Ni-63 1.41E-01 2.55E-06 Np-237 5.46E-05 7.54E-05 Pu-238 7.24E-04 8.20E-03 Pu-239/240 9.99E-04 2.91E-02 Pu-241 1.06E-01 7.92E-05 Sb-125 8.67E-04 5.53E-07 Sr-90 7.59E-03 5.39E-05 Tc-99 3.86E-03 1.23E-05 Sum 1.00E+00 ROC Dose Fraction 9.620E-01 IC Dose Fraction 3.797E-02 RSCS TSD 25-032 Rev 0 Page 47 of 86

2.4.3 Selection of Overall Nuclide Fraction and Determination of FSS ROCs To support FSS activities, a single radionuclide mixture is desired for each potential source-term/survey media rather than a set of values as has been used in Section 2.4.1, representing three statistical/mathematical methods. Evaluation of the three statistical methods, shows that the two methods involving the use of the 75th percentiles result in similar RDF results. The 75th percentile of the Cs-137 fractions approach was noted to generally provide the more conservative results (i.e., slightly larger IC dose fractions). For this reason, the 75th percentile of the Cs-137 fractions approach was used to select a finalized set of FSS ROCs. Table 2-38 shows the final radionuclide mixture fractions which have been selected for each mixture evaluated.

These were the radionuclide mix fractions used for the determination of FSS ROCs and IC dose.

Table 2 Final Radionuclide Mixture Fractions Radionuclide Reactor Building (RXB) Normalized 75th Percentile of the Individual Sample Ratios to Cs-137, (fRAi,k,.75)

Remainder Normalized 75th Percentile of the Individual Sample Ratios to Cs-137, (fRAi,k,.75)

Am-241 8.82E-04 2.28E-03 C-14 7.90E-03 1.05E-01 Cm-243/244 1.01E-04 4.00E-04 Co-60 5.55E-02 4.12E-02 Cs-137 8.29E-01 3.45E-01 Eu-152 2.99E-04 1.33E-03 Eu-154 2.04E-04 1.14E-03 Fe-55 2.89E-02 2.10E-01 H-3 6.48E-03 3.17E-02 Mn-54 2.56E-05 1.05E-04 Nb-94 1.95E-04 4.39E-04 Ni-63 3.86E-02 1.41E-01 Np-237 1.19E-05 5.46E-05 Pu-238 4.52E-04 7.24E-04 Pu-239/240 3.39E-04 9.99E-04 Pu-241 2.49E-02 1.06E-01 Sb-125 6.65E-04 8.67E-04 Sr-90 5.10E-03 7.59E-03 Tc-99 9.03E-04 3.86E-03 RSCS TSD 25-032 Rev 0 Page 48 of 86

Using the 75th percentile provides sufficient overall conservatism in the development of the radionuclide mixtures. A higher percentile value will provide a different mixture profile, but such an approach would give undue weight to outliers of the sample populations. The 75th percentile approaches used in this TSD were also developed using data sets that were adjusted to replace negative values reported by the laboratory with zero values, therefore positively weighting the results. In addition, there is prior precedence in using the 75th percentile, particularly in the parameter selection process for dose modeling to support DCGL calculations, and this approach also results in satisfactory conservatism. This approach was previously used in the development of the LaCrosse (LACBWR) radionuclide mixtures, as documented in Energy Solutions Technical Support Document RS-TD-313196- 001 Radionuclides of Concern During LACBWR Decommissioning (EnergySolutions, 2018) and the Fort Calhoun (FCS) radionuclide mixtures, as documented in Radiation Safety and Control Services (RSCS), "TSD 21-043, Radionuclides of Concern in Support of the Fort Calhoun License Termination Plan (RSCS, 2021)."

For consistency and simplicity, the 75th percentile of the Cs-137 fractions have been chosen to represent the overall nuclide mix for the Reactor Building (RXB) sample population and the Remainder sample population. To select the FSS ROCs, as shown in Table 2-24 to Table 2-37, each radionuclides 75th percentile of the Cs-137 RDF was evaluated in conjunction with the relative percentage of detections above an MDC for that radionuclide (see MDC evaluations in Table 2-7),

and FSS ROCs were selected to maintain an aggregate IC dose of less than 10% of the total dose.

A summary of the FSS ROCs for each location/scenario is provided in Table 2-39 below. Table 2-39 also lists a proposed IC Correction Factor which can be used to adjust the DCGLs developed for FSS at OCS. The RDF evaluation shows that the IC dose fraction ranges from below 1% to approximately 8% of the total dose depending on the survey area/media and the applicable mixture fraction.

Table 2 Summary of FSS ROCs Listed by Survey Area/Media Survey Area/Media Mixture Fraction FSS ROCs ROC / IC Dose % Recommended IC Adjustment Reactor Building concrete RXB Co-60, Cs-137 99.66% / 0.34%

0.95 Concrete other than the Reactor Building Remainder Co-60, Cs-137 96.14% / 3.86%

0.95 Soil Remainder Co-60, Cs-137 98.23% / 1.77%

0.95 Buried piping RXB Remainder C-14, Co-60, Cs-137, Pu-238, Pu-239/240 C-14, Co-60, Cs-137 94.46% / 5.54%

91.82% / 8.18%

0.90 0.90 Embedded piping RXB Remainder C-14, Co-60, Cs-137, Pu-239/240 C-14, Co-60, Cs-137 94.32% / 5.68%

96.20% / 3.80%

0.90 0.95 RSCS TSD 25-032 Rev 0 Page 49 of 86

2.4.4 FSS ROC Mixture Fractions In order to support gross gamma measurements during characterization and final status surveys, an FSS ROC mixture for gamma emitting radionuclides can be used to calculate the sensitivity of gross gamma detectors for a specific mixture. This determination begins by re-normalizing the mixture fractions established in Table 2-38 across all of the finalized FSS ROCs. The re-normalized FSS ROC fractions, including hard-to-detect (HTD) radionuclides, are provided in Table 2-40.

Fractions are shown for all scenarios with a different set of FSS ROCs, and a blank (--) is indicated where the radionuclide shown is not an FSS ROC for the given scenario.

Table 2 Re-Normalized FSS ROC Mixture Fractions Radionuclide RXB Concrete Mixture Fraction Remainder Concrete Mixture Fraction Remainder Soil Mixture Fraction RXB Buried Piping Mixture Fraction Remainder Buried Piping Mixture Fraction RXB Embedded Piping Mixture Fraction Remainder Embedded Piping Mixture Fraction C-14 8.85E-03 2.13E-01 8.86E-03 2.13E-01 Co-60 6.27E-02 1.07E-01 1.07E-01 6.21E-02 8.39E-02 6.21E-02 8.39E-02 Cs-137 9.37E-01 8.93E-01 8.93E-01 9.28E-01 7.03E-01 9.29E-01 7.03E-01 Pu-238 5.06E-04 Pu-239/240 3.80E-04 3.80E-04 Using the data in Table 2-40, the ROC mixture fraction for only the gamma emitters (Co-60 and Cs-137) is re-normalized against the total gamma ROC activity and is shown in Table 2-41.

Table 2 Gamma Re-Normalized FSS ROC Mixture Fractions Radionuclide RXB Concrete Mixture Fraction Remainder Concrete Mixture Fraction Remainder Soil Mixture Fraction RXB Buried Piping Mixture Fraction Remainder Buried Piping Mixture Fraction RXB Embedded Piping Mixture Fraction Remainder Embedded Piping Mixture Fraction Co-60 6.27E-02 1.07E-01 1.07E-01 6.27E-02 1.07E-01 6.27E-02 1.07E-01 Cs-137 9.37E-01 8.93E-01 8.93E-01 9.37E-01 8.93E-01 9.37E-01 8.93E-01 RSCS TSD 25-032 Rev 0 Page 50 of 86

2.5 Surrogate Ratios From the data provided in Section 2.4, it is evident that Cs-137 is the predominant FSS ROC gamma-emitting radionuclide, and Co-60 will also be present in detectable quantities. No HTD radionuclides were identified as FSS ROCs for the concrete and soil mixtures. For buried piping, HTDs C-14, Pu-238, and Pu-239/240 were identified as FSS ROCs for RXB buried piping, and C-14 was the only HTD identified as an FSS ROC for Remainder area buried piping. For embedded piping, HTDs C-14 and Pu-239/240 were identified as FSS ROCs for RXB embedded piping, and C-14 was the only HTD identified as an FSS ROC for Remainder area embedded piping.

Following guidance in MARSSIM, the concentration of HTDs can be inferred from the surrogate concentration of a gamma emitter in cases where samples are not subject to HTD analysis during FSS activities (NRC, 2000). Surrogate relationships were determined for each HTD to correlate the ratio of the respective piping HTD to Cs-137 as the easily detected gamma emitter. These surrogate relationships are provided for planning purposes, and they may be revised using future piping characterization results (as discussed in Section 2.4).

Table 2-42 to Table 2-47 show the decayed concentrations and the surrogate ratios for each applicable HTD ROC in the RXB and Remainder populations. These tables include the decayed/zero-corrected activity, the decayed MDC, and the calculated surrogate ratio. The surrogate ratio is only calculated when both the HTD and Cs-137 activities were detected above the MDC in the respective sample - blank spaces are shown in the ratio column when the ratio was not calculated.

It was noted that there are some cases where no HTD activities were reported above the MDC, and an alternate approach to the surrogate determination was also developed for comparison.

This approach developed surrogate ratios using the decayed/zero corrected activity values (as were used for the activity fraction determinations described in Section 2.3), and only the positively detected activities were used for surrogate ratio determination - blank spaces are shown in the ratio column when the ratio was not calculated. The results of this surrogate ratio determination are provided in Table 2-48 to Table 2-53. Summaries of the surrogate ratios are provided in Table 2-54 and Table 2-55.

RSCS TSD 25-032 Rev 0 Page 51 of 86

Table 2 Reactor Building (RXB) Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Carbon-14 Activity (pCi/g)

C-14 MDC (pCi/g)

Cesium-137 Activity (pCi/g)

Cs-137 MDC (pCi/g)

C-14/Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 3.49E-01 1.28E+01 5.44E+03 3.30E+00 RCA-RXB-CONC-003-0.0-B-QC 0.00E+00 9.94E+00 2.77E+02 5.47E-01 RCA-RXB-CONC-004-0.0-B-D-QC 3.61E-01 1.30E+01 7.14E+01 1.90E-01 RCA-RXB-CONC-009-0.0-B-QC 3.56E+00 1.31E+01 1.37E+02 2.56E-01 RCA-RXB-CONC-011-0.0-B-QC 1.05E+00 1.32E+01 4.11E+01 1.45E-01 RCA-RXB-CONC-012-0.0-B-D-QC 2.69E+00 1.24E+01 9.29E+02 6.99E-01 RCA-RXB-CONC-012-1.0-B-D-QC 2.29E+00 1.31E+01 9.17E+01 1.51E-01 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 1.20E+01 3.59E+02 2.82E-01 RCA-RXB-CONC-014-0.5-B-QC 0.00E+00 1.29E+01 5.10E+01 1.39E-01 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 1.35E+01 1.48E+02 2.48E-01 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 1.38E+01 4.17E+01 2.51E-01 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 1.39E+01 1.03E+02 1.95E-01 RCA-RXB-CONC-023-0.0-B-QC 3.38E+00 1.36E+01 5.90E+02 6.30E-01 RCA-RXB-CONC-023-0.5-B-QC 5.35E+00 1.37E+01 5.22E+01 1.54E-01 RCA-RXB-CONC-024-0.0-B-QC 3.27E+00 1.39E+01 8.93E+02 4.52E-01 RCA-RXB-CONC-024-0.5-B-QC 2.56E+00 1.36E+01 5.54E+01 1.63E-01 RCA-RXB-CONC-025-0.0-B-QC 0.00E+00 1.39E+01 6.07E+02 5.09E-01 RCA-RXB-CONC-026-0.0-B-D-QC 6.95E+00 1.39E+01 4.03E+02 4.39E-01 RCA-RXB-CONC-027-0.0-B-QC 1.11E+00 1.36E+01 2.48E+02 4.56E-01 RCA-RXB-CONC-028-0.0-B-QC 6.37E+00 1.35E+01 2.79E+02 4.70E-01 RCA-RXB-CONC-029-0.0-B-QC 4.09E+00 1.37E+01 3.82E+02 5.39E-01 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 1.39E+01 8.84E+02 5.84E-01 RCA-RXB-CONC-030-0.5-B-QC 1.73E+00 1.35E+01 2.07E+02 2.64E-01 RCA-RXB-CONC-032-0.0-B-QC 6.56E+00 1.41E+01 2.94E+03 1.01E+00 RCA-RXB-CONC-034-0.0-B-QC 6.29E+00 1.38E+01 5.34E+03 1.56E+00 RCA-RXB-CONC-035-0.0-B-QC 4.35E+00 1.35E+01 5.32E+02 7.25E-01 RCA-RXB-CONC-035-0.5-B-QC 2.75E+00 1.41E+01 8.97E+01 1.75E-01 RCA-RXB-CONC-036-0.0-B-QC 2.79E+00 1.29E+01 8.24E+02 9.96E-01 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 1.30E+01 5.04E+01 3.01E-01 RCA-RXB-CONC-038-0.0-B-QC 0.00E+00 1.36E+01 3.46E+02 5.08E-01 RCA-RXB-CONC-040-0.0-B-QC 3.14E+00 1.32E+01 7.18E+02 4.38E-01 RCA-RXB-CONC-041-0.0-B-QC 4.63E-01 1.34E+01 2.70E+02 3.52E-01 RCA-RXB-CONC-043-0.0-B-QC 1.81E+00 1.30E+01 7.05E+02 6.62E-01 RCA-RXB-CONC-046-0.0-B-QC 4.62E+00 1.40E+01 1.90E+03 9.59E-01 RCA-RXB-CONC-048-0.0-B-QC 4.24E+00 1.39E+01 9.78E+02 7.70E-01

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 52 of 86

Table 2 Remainder Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Carbon-14 Activity (pCi/g)

C-14 MDC (pCi/g)

Cesium-137 Activity (pCi/g+)

Cs-137 MDC (pCi/g)

C-14/Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 3.32E+00 1.57E+01 1.89E+02 8.45E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 1.82E+01 1.82E+03 1.18E+01 RCA-BSTK-CONC-004-0.0-B-QC 0.00E+00 1.50E+01 3.08E+01 3.10E-01 RCA-NRWT-CONC-002-0.0-B-QC 6.82E+00 1.38E+01 5.27E+02 4.15E-01 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 1.40E+01 2.07E+01 1.17E-01 RCA-NRWT-CONC-003-0.0-B-QC 2.32E+00 1.40E+01 2.68E+01 1.42E-01 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 1.38E+01 4.07E+01 1.94E-01 RCA-NRWT-CONC-006-0.0-B-QC 0.00E+00 1.38E+01 7.21E+01 2.24E-01 RCA-NRWT-CONC-007-0.0-B-QC 3.30E+00 1.41E+01 4.10E+03 3.08E+00 RCA-NRWT-CONC-007-0.5-B-QC 4.31E+00 1.56E+01 5.04E+01 1.47E-01 RCA-RXBT-CONC-001-0.0-B-D-QC 1.31E+01 1.56E+01 4.07E+01 2.12E-01 RCA-RXBT-CONC-002-0.0-B-QC 4.69E+00 1.55E+01 4.73E-01 1.54E-01 RCA-RXBT-CONC-003-0.0-B-QC 1.68E+01 1.52E+01 5.01E+01 1.82E-01 3.35E-01 RCA-TURB-CONC-033-0.5-B-I-QC 1.58E+00 9.47E+00 7.19E-01 4.11E-02 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 7.77E+00 9.87E-02 3.28E-02 RCA-TURB-CONC-033-1.5-B-I-QC 0.00E+00 8.48E+00 9.29E-02 3.54E-02 RCA-TURT-CONC-001-0.0-B-QC 1.41E+00 1.53E+01 5.99E+01 2.47E-01 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 1.53E+01 3.05E+01 1.30E-01 RCA-TURT-CONC-005-0.0-B-QC 0.00E+00 1.55E+01 5.86E+01 1.88E-01 RCA-TURT-CONC-005-0.5-B-QC 8.02E+00 1.55E+01 5.46E+00 8.05E-02 RCA-TURT-CONC-007-0.0-B-D-QC 4.95E+00 1.55E+01 1.74E+01 1.34E-01 RCA-TURT-CONC-007-0.5-B-D-QC 5.50E+00 1.56E+01 5.02E+00 1.05E-01 RCA-TURT-CONC-009-0.0-B-QC 6.79E+00 1.58E+01 3.56E+01 1.45E-01

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 53 of 86

Table 2 Reactor Building (RXB) Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Plutonium-238 Activity (pCi/g)

Pu-238 MDC (pCi/g)

Cesium-137 Activity (pCi/g)

Cs-137 MDC (pCi/g)

Pu-238/Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 7.41E-02 1.98E-01 5.44E+03 3.30E+00 RCA-RXB-CONC-003-0.0-B-QC 1.89E-01 4.22E-01 2.77E+02 5.47E-01 RCA-RXB-CONC-004-0.0-B-D-QC 3.14E-02 1.94E-01 7.14E+01 1.90E-01 RCA-RXB-CONC-009-0.0-B-QC 5.42E-03 2.10E-01 1.37E+02 2.56E-01 RCA-RXB-CONC-011-0.0-B-QC 0.00E+00 1.76E-01 4.11E+01 1.45E-01 RCA-RXB-CONC-012-0.0-B-D-QC 3.76E-02 1.80E-01 9.29E+02 6.99E-01 RCA-RXB-CONC-012-1.0-B-D-QC 5.96E-02 1.85E-01 9.17E+01 1.51E-01 RCA-RXB-CONC-014-0.0-B-QC 8.08E-02 2.16E-01 3.59E+02 2.82E-01 RCA-RXB-CONC-014-0.5-B-QC 9.58E-02 1.63E-01 5.10E+01 1.39E-01 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 2.27E-01 1.48E+02 2.48E-01 RCA-RXB-CONC-020-0.0-B-QC 3.23E-02 2.00E-01 4.17E+01 2.51E-01 RCA-RXB-CONC-020-0.5-B-QC 1.01E-01 1.94E-01 1.03E+02 1.95E-01 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 3.78E-01 5.90E+02 6.30E-01 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 1.45E-01 5.22E+01 1.54E-01 RCA-RXB-CONC-024-0.0-B-QC 8.16E-02 1.93E-01 8.93E+02 4.52E-01 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 3.74E-01 5.54E+01 1.63E-01 RCA-RXB-CONC-025-0.0-B-QC 2.66E-01 7.18E-01 6.07E+02 5.09E-01 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 2.12E-01 4.03E+02 4.39E-01 RCA-RXB-CONC-027-0.0-B-QC 3.70E-02 1.97E-01 2.48E+02 4.56E-01 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.36E-01 2.79E+02 4.70E-01 RCA-RXB-CONC-029-0.0-B-QC 5.56E-02 1.73E-01 3.82E+02 5.39E-01 RCA-RXB-CONC-030-0.0-B-QC 7.23E-02 1.93E-01 8.84E+02 5.84E-01 RCA-RXB-CONC-030-0.5-B-QC 0.00E+00 3.66E-01 2.07E+02 2.64E-01 RCA-RXB-CONC-032-0.0-B-QC 6.75E-01 8.37E-01 2.94E+03 1.01E+00 RCA-RXB-CONC-034-0.0-B-QC 2.78E-01 3.34E-01 5.34E+03 1.56E+00 RCA-RXB-CONC-035-0.0-B-QC 1.27E+00 5.84E-01 5.32E+02 7.25E-01 2.39E-03 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 1.60E-01 8.97E+01 1.75E-01 RCA-RXB-CONC-036-0.0-B-QC 2.72E+00 3.48E-01 8.24E+02 9.96E-01 3.30E-03 RCA-RXB-CONC-037-0.0-B-QC 1.16E-01 3.59E-01 5.04E+01 3.01E-01 RCA-RXB-CONC-038-0.0-B-QC 3.25E-01 6.26E-01 3.46E+02 5.08E-01 RCA-RXB-CONC-040-0.0-B-QC 1.73E-01 3.29E-01 7.18E+02 4.38E-01 RCA-RXB-CONC-041-0.0-B-QC 1.02E-01 3.18E-01 2.70E+02 3.52E-01 RCA-RXB-CONC-043-0.0-B-QC 1.22E-01 2.90E-01 7.05E+02 6.62E-01 RCA-RXB-CONC-046-0.0-B-QC 2.15E-01 2.99E-01 1.90E+03 9.59E-01 RCA-RXB-CONC-048-0.0-B-QC 1.78E-01 1.87E-01 9.78E+02 7.70E-01

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 54 of 86

Table 2 Remainder Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Plutonium-238 Activity (pCi/g)

Pu-238 MDC (pCi/g)

Cesium-137 Activity (pCi/g)

Cs-137 MDC (pCi/g)

Pu-238/Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 1.93E-01 2.69E-01 1.89E+02 8.45E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 9.25E-01 5.01E-01 1.82E+03 1.18E+01 5.09E-04 RCA-BSTK-CONC-004-0.0-B-QC 6.64E-02 1.78E-01 3.08E+01 3.10E-01 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 3.11E-01 5.27E+02 4.15E-01 RCA-NRWT-CONC-002-0.5-B-QC 2.87E-02 1.78E-01 2.07E+01 1.17E-01 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 3.15E-01 2.68E+01 1.42E-01 RCA-NRWT-CONC-005-0.0-B-QC 3.49E-02 2.97E-01 4.07E+01 1.94E-01 RCA-NRWT-CONC-006-0.0-B-QC 2.32E-03 3.73E-01 7.21E+01 2.24E-01 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 2.35E-01 4.10E+03 3.08E+00 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 1.94E-01 5.04E+01 1.47E-01 RCA-RXBT-CONC-001-0.0-B-D-QC 3.35E-02 2.69E-01 4.07E+01 2.12E-01 RCA-RXBT-CONC-002-0.0-B-QC 3.04E-02 1.67E-01 4.73E-01 1.54E-01 RCA-RXBT-CONC-003-0.0-B-QC 5.00E-02 2.32E-01 5.01E+01 1.82E-01 RCA-TURB-CONC-033-0.5-B-I-QC 2.74E-02 1.31E-01 7.19E-01 4.11E-02 RCA-TURB-CONC-033-1.0-B-I-QC 5.40E-02 9.38E-02 9.87E-02 3.28E-02 RCA-TURB-CONC-033-1.5-B-I-QC 4.18E-02 1.14E-01 9.29E-02 3.54E-02 RCA-TURT-CONC-001-0.0-B-QC 7.73E-02 1.73E-01 5.99E+01 2.47E-01 RCA-TURT-CONC-003-0.0-B-QC 2.67E-02 2.13E-01 3.05E+01 1.30E-01 RCA-TURT-CONC-005-0.0-B-QC 1.43E-02 3.06E-01 5.86E+01 1.88E-01 RCA-TURT-CONC-005-0.5-B-QC 5.97E-02 2.78E-01 5.46E+00 8.05E-02 RCA-TURT-CONC-007-0.0-B-D-QC 1.81E-02 1.45E-01 1.74E+01 1.34E-01 RCA-TURT-CONC-007-0.5-B-D-QC 2.67E-03 1.71E-01 5.02E+00 1.05E-01 RCA-TURT-CONC-009-0.0-B-QC 7.25E-02 1.34E-01 3.56E+01 1.45E-01

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 55 of 86

Table 2 Reactor Building (RXB) Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Plutonium-239/240 Activity (pCi/g)

Pu-239/240 MDC (pCi/g)

Cesium-137 Activity (pCi/g)

Cs-137 MDC (pCi/g)

Pu-239/240/

Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 1.51E-01 2.33E-01 5.44E+03 3.30E+00 RCA-RXB-CONC-003-0.0-B-QC 2.17E-01 3.66E-01 2.77E+02 5.47E-01 RCA-RXB-CONC-004-0.0-B-D-QC 0.00E+00 2.15E-01 7.14E+01 1.90E-01 RCA-RXB-CONC-009-0.0-B-QC 5.26E-02 1.87E-01 1.37E+02 2.56E-01 RCA-RXB-CONC-011-0.0-B-QC 2.90E-02 1.79E-01 4.11E+01 1.45E-01 RCA-RXB-CONC-012-0.0-B-D-QC 2.27E-02 2.36E-01 9.29E+02 6.99E-01 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 1.56E-01 9.17E+01 1.51E-01 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 2.54E-01 3.59E+02 2.82E-01 RCA-RXB-CONC-014-0.5-B-QC 2.27E-02 1.81E-01 5.10E+01 1.39E-01 RCA-RXB-CONC-019-0.0-B-QC 2.12E-02 2.21E-01 1.48E+02 2.48E-01 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 2.69E-01 4.17E+01 2.51E-01 RCA-RXB-CONC-020-0.5-B-QC 2.49E-02 1.98E-01 1.03E+02 1.95E-01 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 3.12E-01 5.90E+02 6.30E-01 RCA-RXB-CONC-023-0.5-B-QC 2.27E-02 1.80E-01 5.22E+01 1.54E-01 RCA-RXB-CONC-024-0.0-B-QC 2.22E-02 1.77E-01 8.93E+02 4.52E-01 RCA-RXB-CONC-024-0.5-B-QC 1.07E-01 3.82E-01 5.54E+01 1.63E-01 RCA-RXB-CONC-025-0.0-B-QC 6.27E-02 6.45E-01 6.07E+02 5.09E-01 RCA-RXB-CONC-026-0.0-B-D-QC 6.41E-03 2.48E-01 4.03E+02 4.39E-01 RCA-RXB-CONC-027-0.0-B-QC 5.73E-02 1.53E-01 2.48E+02 4.56E-01 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.10E-01 2.79E+02 4.70E-01 RCA-RXB-CONC-029-0.0-B-QC 1.39E-02 1.97E-01 3.82E+02 5.39E-01 RCA-RXB-CONC-030-0.0-B-QC 1.01E-01 2.39E-01 8.84E+02 5.84E-01 RCA-RXB-CONC-030-0.5-B-QC 0.00E+00 4.53E-01 2.07E+02 2.64E-01 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 8.92E-01 2.94E+03 1.01E+00 RCA-RXB-CONC-034-0.0-B-QC 1.03E-01 3.21E-01 5.34E+03 1.56E+00 RCA-RXB-CONC-035-0.0-B-QC 7.87E-01 5.66E-01 5.32E+02 7.25E-01 1.48E-03 RCA-RXB-CONC-035-0.5-B-QC 1.67E-02 1.74E-01 8.97E+01 1.75E-01 RCA-RXB-CONC-036-0.0-B-QC 2.80E+00 5.23E-01 8.24E+02 9.96E-01 3.40E-03 RCA-RXB-CONC-037-0.0-B-QC 3.75E-02 3.90E-01 5.04E+01 3.01E-01 RCA-RXB-CONC-038-0.0-B-QC 3.97E-01 7.78E-01 3.46E+02 5.08E-01 RCA-RXB-CONC-040-0.0-B-QC 7.68E-03 2.97E-01 7.18E+02 4.38E-01 RCA-RXB-CONC-041-0.0-B-QC 6.50E-02 3.02E-01 2.70E+02 3.52E-01 RCA-RXB-CONC-043-0.0-B-QC 2.71E-02 2.82E-01 7.05E+02 6.62E-01 RCA-RXB-CONC-046-0.0-B-QC 2.96E-01 2.42E-01 1.90E+03 9.59E-01 1.56E-04 RCA-RXB-CONC-048-0.0-B-QC 3.57E-01 1.71E-01 9.78E+02 7.70E-01 3.65E-04

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 56 of 86

Table 2 Remainder Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Activities Above MDC Sample ID Plutonium-239/240 Activity (pCi/g)

Pu-239/240 MDC (pCi/g)

Cesium-137 Activity (pCi/g)

Cs-137 MDC (pCi/g)

Pu-239/240/

Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 1.39E-01 3.89E-01 1.89E+02 8.45E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 4.83E-01 4.02E-01 1.82E+03 1.18E+01 2.66E-04 RCA-BSTK-CONC-004-0.0-B-QC 0.00E+00 1.62E-01 3.08E+01 3.10E-01 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 3.50E-01 5.27E+02 4.15E-01 RCA-NRWT-CONC-002-0.5-B-QC 6.79E-02 1.81E-01 2.07E+01 1.17E-01 RCA-NRWT-CONC-003-0.0-B-QC 5.35E-02 2.85E-01 2.68E+01 1.42E-01 RCA-NRWT-CONC-005-0.0-B-QC 2.85E-02 2.27E-01 4.07E+01 1.94E-01 RCA-NRWT-CONC-006-0.0-B-QC 1.66E-02 3.54E-01 7.21E+01 2.24E-01 RCA-NRWT-CONC-007-0.0-B-QC 7.83E-02 2.09E-01 4.10E+03 3.08E+00 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 2.11E-01 5.04E+01 1.47E-01 RCA-RXBT-CONC-001-0.0-B-D-QC 9.73E-02 2.41E-01 4.07E+01 2.12E-01 RCA-RXBT-CONC-002-0.0-B-QC 4.85E-02 2.28E-01 4.73E-01 1.54E-01 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 2.38E-01 5.01E+01 1.82E-01 RCA-TURB-CONC-033-0.5-B-I-QC 6.14E-02 1.54E-01 7.19E-01 4.11E-02 RCA-TURB-CONC-033-1.0-B-I-QC 8.01E-04 1.32E-01 9.87E-02 3.28E-02 RCA-TURB-CONC-033-1.5-B-I-QC 4.96E-02 1.60E-01 9.29E-02 3.54E-02 RCA-TURT-CONC-001-0.0-B-QC 9.08E-02 2.60E-01 5.99E+01 2.47E-01 RCA-TURT-CONC-003-0.0-B-QC 6.84E-03 2.64E-01 3.05E+01 1.30E-01 RCA-TURT-CONC-005-0.0-B-QC 1.13E-01 3.25E-01 5.86E+01 1.88E-01 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 2.24E-01 5.46E+00 8.05E-02 RCA-TURT-CONC-007-0.0-B-D-QC 7.09E-02 1.62E-01 1.74E+01 1.34E-01 RCA-TURT-CONC-007-0.5-B-D-QC 1.26E-02 1.54E-01 5.02E+00 1.05E-01 RCA-TURT-CONC-009-0.0-B-QC 7.82E-02 1.27E-01 3.56E+01 1.45E-01

• If either nuclide is <MDC then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 57 of 86

Table 2 Reactor Building (RXB) Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Carbon-14 Activity (pCi/g)

Cesium-137 Activity (pCi/g)

C-14/Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 3.49E-01 5.44E+03 6.42E-05 RCA-RXB-CONC-003-0.0-B-QC 0.00E+00 2.77E+02 RCA-RXB-CONC-004-0.0-B-D-QC 3.61E-01 7.14E+01 5.05E-03 RCA-RXB-CONC-009-0.0-B-QC 3.56E+00 1.37E+02 2.60E-02 RCA-RXB-CONC-011-0.0-B-QC 1.05E+00 4.11E+01 2.56E-02 RCA-RXB-CONC-012-0.0-B-D-QC 2.69E+00 9.29E+02 2.90E-03 RCA-RXB-CONC-012-1.0-B-D-QC 2.29E+00 9.17E+01 2.50E-02 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 3.59E+02 RCA-RXB-CONC-014-0.5-B-QC 0.00E+00 5.10E+01 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 1.48E+02 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 4.17E+01 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 1.03E+02 RCA-RXB-CONC-023-0.0-B-QC 3.38E+00 5.90E+02 5.73E-03 RCA-RXB-CONC-023-0.5-B-QC 5.35E+00 5.22E+01 1.03E-01 RCA-RXB-CONC-024-0.0-B-QC 3.27E+00 8.93E+02 3.66E-03 RCA-RXB-CONC-024-0.5-B-QC 2.56E+00 5.54E+01 4.62E-02 RCA-RXB-CONC-025-0.0-B-QC 0.00E+00 6.07E+02 RCA-RXB-CONC-026-0.0-B-D-QC 6.95E+00 4.03E+02 1.72E-02 RCA-RXB-CONC-027-0.0-B-QC 1.11E+00 2.48E+02 4.48E-03 RCA-RXB-CONC-028-0.0-B-QC 6.37E+00 2.79E+02 2.28E-02 RCA-RXB-CONC-029-0.0-B-QC 4.09E+00 3.82E+02 1.07E-02 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 8.84E+02 RCA-RXB-CONC-030-0.5-B-QC 1.73E+00 2.07E+02 8.37E-03 RCA-RXB-CONC-032-0.0-B-QC 6.56E+00 2.94E+03 2.23E-03 RCA-RXB-CONC-034-0.0-B-QC 6.29E+00 5.34E+03 1.18E-03 RCA-RXB-CONC-035-0.0-B-QC 4.35E+00 5.32E+02 8.18E-03 RCA-RXB-CONC-035-0.5-B-QC 2.75E+00 8.97E+01 3.07E-02 RCA-RXB-CONC-036-0.0-B-QC 2.79E+00 8.24E+02 3.38E-03 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 5.04E+01 RCA-RXB-CONC-038-0.0-B-QC 0.00E+00 3.46E+02 RCA-RXB-CONC-040-0.0-B-QC 3.14E+00 7.18E+02 4.37E-03 RCA-RXB-CONC-041-0.0-B-QC 4.63E-01 2.70E+02 1.71E-03 RCA-RXB-CONC-043-0.0-B-QC 1.81E+00 7.05E+02 2.57E-03 RCA-RXB-CONC-046-0.0-B-QC 4.62E+00 1.90E+03 2.43E-03 RCA-RXB-CONC-048-0.0-B-QC 4.24E+00 9.78E+02 4.33E-03

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 58 of 86

Table 2 Remainder Population C-14 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Carbon-14 Activity (pCi/g)

Cesium-137 Activity (pCi/g+)

C-14/Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 3.32E+00 1.89E+02 1.75E-02 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 1.82E+03 RCA-BSTK-CONC-004-0.0-B-QC 0.00E+00 3.08E+01 RCA-NRWT-CONC-002-0.0-B-QC 6.82E+00 5.27E+02 1.29E-02 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 2.07E+01 RCA-NRWT-CONC-003-0.0-B-QC 2.32E+00 2.68E+01 8.64E-02 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 4.07E+01 RCA-NRWT-CONC-006-0.0-B-QC 0.00E+00 7.21E+01 RCA-NRWT-CONC-007-0.0-B-QC 3.30E+00 4.10E+03 8.04E-04 RCA-NRWT-CONC-007-0.5-B-QC 4.31E+00 5.04E+01 8.54E-02 RCA-RXBT-CONC-001-0.0-B-D-QC 1.31E+01 4.07E+01 3.21E-01 RCA-RXBT-CONC-002-0.0-B-QC 4.69E+00 4.73E-01 9.92E+00 RCA-RXBT-CONC-003-0.0-B-QC 1.68E+01 5.01E+01 3.35E-01 RCA-TURB-CONC-033-0.5-B-I-QC 1.58E+00 7.19E-01 2.20E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 9.87E-02 RCA-TURB-CONC-033-1.5-B-I-QC 0.00E+00 9.29E-02 RCA-TURT-CONC-001-0.0-B-QC 1.41E+00 5.99E+01 2.35E-02 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 3.05E+01 RCA-TURT-CONC-005-0.0-B-QC 0.00E+00 5.86E+01 RCA-TURT-CONC-005-0.5-B-QC 8.02E+00 5.46E+00 1.47E+00 RCA-TURT-CONC-007-0.0-B-D-QC 4.95E+00 1.74E+01 2.84E-01 RCA-TURT-CONC-007-0.5-B-D-QC 5.50E+00 5.02E+00 1.09E+00 RCA-TURT-CONC-009-0.0-B-QC 6.79E+00 3.56E+01 1.91E-01

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 59 of 86

Table 2 Reactor Building (RXB) Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Plutonium-238 Activity (pCi/g)

Cesium-137 Activity (pCi/g)

Pu-238/Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 7.41E-02 5.44E+03 1.36E-05 RCA-RXB-CONC-003-0.0-B-QC 1.89E-01 2.77E+02 6.82E-04 RCA-RXB-CONC-004-0.0-B-D-QC 3.14E-02 7.14E+01 4.40E-04 RCA-RXB-CONC-009-0.0-B-QC 5.42E-03 1.37E+02 3.96E-05 RCA-RXB-CONC-011-0.0-B-QC 0.00E+00 4.11E+01 RCA-RXB-CONC-012-0.0-B-D-QC 3.76E-02 9.29E+02 4.05E-05 RCA-RXB-CONC-012-1.0-B-D-QC 5.96E-02 9.17E+01 6.50E-04 RCA-RXB-CONC-014-0.0-B-QC 8.08E-02 3.59E+02 2.25E-04 RCA-RXB-CONC-014-0.5-B-QC 9.58E-02 5.10E+01 1.88E-03 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 1.48E+02 RCA-RXB-CONC-020-0.0-B-QC 3.23E-02 4.17E+01 7.74E-04 RCA-RXB-CONC-020-0.5-B-QC 1.01E-01 1.03E+02 9.72E-04 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 5.90E+02 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 5.22E+01 RCA-RXB-CONC-024-0.0-B-QC 8.16E-02 8.93E+02 9.13E-05 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 5.54E+01 RCA-RXB-CONC-025-0.0-B-QC 2.66E-01 6.07E+02 4.39E-04 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 4.03E+02 RCA-RXB-CONC-027-0.0-B-QC 3.70E-02 2.48E+02 1.49E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.79E+02 RCA-RXB-CONC-029-0.0-B-QC 5.56E-02 3.82E+02 1.46E-04 RCA-RXB-CONC-030-0.0-B-QC 7.23E-02 8.84E+02 8.18E-05 RCA-RXB-CONC-030-0.5-B-QC 0.00E+00 2.07E+02 RCA-RXB-CONC-032-0.0-B-QC 6.75E-01 2.94E+03 2.29E-04 RCA-RXB-CONC-034-0.0-B-QC 2.78E-01 5.34E+03 5.21E-05 RCA-RXB-CONC-035-0.0-B-QC 1.27E+00 5.32E+02 2.39E-03 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 8.97E+01 RCA-RXB-CONC-036-0.0-B-QC 2.72E+00 8.24E+02 3.30E-03 RCA-RXB-CONC-037-0.0-B-QC 1.16E-01 5.04E+01 2.30E-03 RCA-RXB-CONC-038-0.0-B-QC 3.25E-01 3.46E+02 9.41E-04 RCA-RXB-CONC-040-0.0-B-QC 1.73E-01 7.18E+02 2.40E-04 RCA-RXB-CONC-041-0.0-B-QC 1.02E-01 2.70E+02 3.76E-04 RCA-RXB-CONC-043-0.0-B-QC 1.22E-01 7.05E+02 1.73E-04 RCA-RXB-CONC-046-0.0-B-QC 2.15E-01 1.90E+03 1.13E-04 RCA-RXB-CONC-048-0.0-B-QC 1.78E-01 9.78E+02 1.82E-04

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 60 of 86

Table 2 Remainder Population Pu-238 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Plutonium-238 Activity (pCi/g)

Cesium-137 Activity (pCi/g)

Pu-238/Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 1.93E-01 1.89E+02 1.02E-03 RCA-BSTK-CONC-003-0.0-B-D-QC 9.25E-01 1.82E+03 5.09E-04 RCA-BSTK-CONC-004-0.0-B-QC 6.64E-02 3.08E+01 2.16E-03 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 5.27E+02 RCA-NRWT-CONC-002-0.5-B-QC 2.87E-02 2.07E+01 1.39E-03 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 2.68E+01 RCA-NRWT-CONC-005-0.0-B-QC 3.49E-02 4.07E+01 8.56E-04 RCA-NRWT-CONC-006-0.0-B-QC 2.32E-03 7.21E+01 3.22E-05 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 4.10E+03 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 5.04E+01 RCA-RXBT-CONC-001-0.0-B-D-QC 3.35E-02 4.07E+01 8.22E-04 RCA-RXBT-CONC-002-0.0-B-QC 3.04E-02 4.73E-01 6.42E-02 RCA-RXBT-CONC-003-0.0-B-QC 5.00E-02 5.01E+01 9.97E-04 RCA-TURB-CONC-033-0.5-B-I-QC 2.74E-02 7.19E-01 3.82E-02 RCA-TURB-CONC-033-1.0-B-I-QC 5.40E-02 9.87E-02 5.47E-01 RCA-TURB-CONC-033-1.5-B-I-QC 4.18E-02 9.29E-02 4.50E-01 RCA-TURT-CONC-001-0.0-B-QC 7.73E-02 5.99E+01 1.29E-03 RCA-TURT-CONC-003-0.0-B-QC 2.67E-02 3.05E+01 8.78E-04 RCA-TURT-CONC-005-0.0-B-QC 1.43E-02 5.86E+01 2.45E-04 RCA-TURT-CONC-005-0.5-B-QC 5.97E-02 5.46E+00 1.09E-02 RCA-TURT-CONC-007-0.0-B-D-QC 1.81E-02 1.74E+01 1.04E-03 RCA-TURT-CONC-007-0.5-B-D-QC 2.67E-03 5.02E+00 5.32E-04 RCA-TURT-CONC-009-0.0-B-QC 7.25E-02 3.56E+01 2.04E-03

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 61 of 86

Table 2 Reactor Building (RXB) Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Plutonium-239/240 Activity (pCi/g)

Cesium-137 Activity (pCi/g)

Pu-239/240/

Cs-137 Ratio*

RCA-RXB-CONC-002-0.0-B-QC 1.51E-01 5.44E+03 2.78E-05 RCA-RXB-CONC-003-0.0-B-QC 2.17E-01 2.77E+02 7.82E-04 RCA-RXB-CONC-004-0.0-B-D-QC 0.00E+00 7.14E+01 RCA-RXB-CONC-009-0.0-B-QC 5.26E-02 1.37E+02 3.84E-04 RCA-RXB-CONC-011-0.0-B-QC 2.90E-02 4.11E+01 7.06E-04 RCA-RXB-CONC-012-0.0-B-D-QC 2.27E-02 9.29E+02 2.44E-05 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 9.17E+01 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 3.59E+02 RCA-RXB-CONC-014-0.5-B-QC 2.27E-02 5.10E+01 4.45E-04 RCA-RXB-CONC-019-0.0-B-QC 2.12E-02 1.48E+02 1.43E-04 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 4.17E+01 RCA-RXB-CONC-020-0.5-B-QC 2.49E-02 1.03E+02 2.41E-04 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 5.90E+02 RCA-RXB-CONC-023-0.5-B-QC 2.27E-02 5.22E+01 4.35E-04 RCA-RXB-CONC-024-0.0-B-QC 2.22E-02 8.93E+02 2.48E-05 RCA-RXB-CONC-024-0.5-B-QC 1.07E-01 5.54E+01 1.93E-03 RCA-RXB-CONC-025-0.0-B-QC 6.27E-02 6.07E+02 1.03E-04 RCA-RXB-CONC-026-0.0-B-D-QC 6.41E-03 4.03E+02 1.59E-05 RCA-RXB-CONC-027-0.0-B-QC 5.73E-02 2.48E+02 2.31E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.79E+02 RCA-RXB-CONC-029-0.0-B-QC 1.39E-02 3.82E+02 3.64E-05 RCA-RXB-CONC-030-0.0-B-QC 1.01E-01 8.84E+02 1.14E-04 RCA-RXB-CONC-030-0.5-B-QC 0.00E+00 2.07E+02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 2.94E+03 RCA-RXB-CONC-034-0.0-B-QC 1.03E-01 5.34E+03 1.93E-05 RCA-RXB-CONC-035-0.0-B-QC 7.87E-01 5.32E+02 1.48E-03 RCA-RXB-CONC-035-0.5-B-QC 1.67E-02 8.97E+01 1.86E-04 RCA-RXB-CONC-036-0.0-B-QC 2.80E+00 8.24E+02 3.40E-03 RCA-RXB-CONC-037-0.0-B-QC 3.75E-02 5.04E+01 7.44E-04 RCA-RXB-CONC-038-0.0-B-QC 3.97E-01 3.46E+02 1.15E-03 RCA-RXB-CONC-040-0.0-B-QC 7.68E-03 7.18E+02 1.07E-05 RCA-RXB-CONC-041-0.0-B-QC 6.50E-02 2.70E+02 2.41E-04 RCA-RXB-CONC-043-0.0-B-QC 2.71E-02 7.05E+02 3.84E-05 RCA-RXB-CONC-046-0.0-B-QC 2.96E-01 1.90E+03 1.56E-04 RCA-RXB-CONC-048-0.0-B-QC 3.57E-01 9.78E+02 3.65E-04

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 62 of 86

Table 2 Remainder Population Pu-239/240 and Cs-137 Surrogate Ratio Determination, Based on Positively Detected Activities Sample ID Plutonium-239/240 Activity (pCi/g)

Cesium-137 Activity (pCi/g)

Pu-239/240/

Cs-137 Ratio*

RCA-BSTK-CONC-001-0.0-B-QC 1.39E-01 1.89E+02 7.35E-04 RCA-BSTK-CONC-003-0.0-B-D-QC 4.83E-01 1.82E+03 2.66E-04 RCA-BSTK-CONC-004-0.0-B-QC 0.00E+00 3.08E+01 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 5.27E+02 RCA-NRWT-CONC-002-0.5-B-QC 6.79E-02 2.07E+01 3.28E-03 RCA-NRWT-CONC-003-0.0-B-QC 5.35E-02 2.68E+01 1.99E-03 RCA-NRWT-CONC-005-0.0-B-QC 2.85E-02 4.07E+01 7.00E-04 RCA-NRWT-CONC-006-0.0-B-QC 1.66E-02 7.21E+01 2.30E-04 RCA-NRWT-CONC-007-0.0-B-QC 7.83E-02 4.10E+03 1.91E-05 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 5.04E+01 RCA-RXBT-CONC-001-0.0-B-D-QC 9.73E-02 4.07E+01 2.39E-03 RCA-RXBT-CONC-002-0.0-B-QC 4.85E-02 4.73E-01 1.03E-01 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 5.01E+01 RCA-TURB-CONC-033-0.5-B-I-QC 6.14E-02 7.19E-01 8.54E-02 RCA-TURB-CONC-033-1.0-B-I-QC 8.01E-04 9.87E-02 8.12E-03 RCA-TURB-CONC-033-1.5-B-I-QC 4.96E-02 9.29E-02 5.34E-01 RCA-TURT-CONC-001-0.0-B-QC 9.08E-02 5.99E+01 1.52E-03 RCA-TURT-CONC-003-0.0-B-QC 6.84E-03 3.05E+01 2.24E-04 RCA-TURT-CONC-005-0.0-B-QC 1.13E-01 5.86E+01 1.93E-03 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 5.46E+00 RCA-TURT-CONC-007-0.0-B-D-QC 7.09E-02 1.74E+01 4.07E-03 RCA-TURT-CONC-007-0.5-B-D-QC 1.26E-02 5.02E+00 2.51E-03 RCA-TURT-CONC-009-0.0-B-QC 7.82E-02 3.56E+01 2.20E-03

• If either nuclide is not positively detected then a ratio will not be calculated, and there is no entry in the ratio column for a given sample.

RSCS TSD 25-032 Rev 0 Page 63 of 86

For each set of surrogate ratios, the average, minimum, maximum, standard deviation, %

coefficient of variation, and the 75th and 95th percentile of the ratios are shown for each sample population in Table 2-54 (for results using only activities greater than the MDC) and Table 2-55 (for results using only positively detected activities). In cases where a parameter could not be developed (e.g., too few samples above an MDC), a blank -- is shown in the table.

Table 2 Surrogate Ratios, HTD to Cs-137 Per RXB/Remainder Population, Based on Activities Above MDC Parmeter RXB C-14 Remainder C-14 RXB Pu-238 Remainder Pu-238 RXB Pu-239/240 Remainder Pu-239/240 Average Ratio 3.35E-01 2.84E-03 5.09E-04 1.35E-03 2.66E-04 Minimum Ratio 3.35E-01 2.39E-03 5.09E-04 1.56E-04 2.66E-04 Maximum Ratio 3.35E-01 3.30E-03 5.09E-04 3.40E-03 2.66E-04 Standard Deviation 6.49E-04 1.48E-03

% Coefficient of Variation 23%

110%

75th Percentile of Ratios 3.35E-01 3.07E-03 5.09E-04 1.96E-03 2.66E-04 95th Percentile of Ratios 3.35E-01 3.26E-03 5.09E-04 3.11E-03 2.66E-04 Table 2 Surrogate Ratios, HTD to Cs-137 Per RXB/Remainder Population, Based on Positively Detected Activities Parmeter RXB C-14 Remainder C-14 RXB Pu-238 Remainder Pu-238 RXB Pu-239/240 Remainder Pu-239/240 Average Ratio 1.47E-02 1.15E+00 6.51E-04 5.91E-02 4.97E-04 4.18E-02 Minimum Ratio 6.42E-05 8.04E-04 1.36E-05 3.22E-05 1.07E-05 1.91E-05 Maximum Ratio 1.03E-01 9.92E+00 3.30E-03 5.47E-01 3.40E-03 5.34E-01 Standard Deviation 2.18E-02 2.61E+00 8.62E-04 1.56E-01 7.52E-04 1.26E-01

% Coefficient of Variation 148%

228%

132%

265%

151%

302%

75th Percentile of Ratios 2.28E-02 9.05E-01 7.51E-04 6.55E-03 5.75E-04 3.87E-03 95th Percentile of Ratios 4.31E-02 4.90E+00 2.37E-03 4.59E-01 1.80E-03 1.67E-01 MARSSIM recommends usage of the 95th percentile value for surrogate ratios to provide conservatism during the final status surveys. A comparison between the 95th percentile of the ratios from the two different approaches generally shows additional conservatism when all positively detected data are used to develop the ratio. When sufficient sample results are available above an MDC, the associated surrogate ratios are expected to be more accurate for the respective data set, with conservatism added by using a 95th percentile. The HTDs evaluated in this TSD are only applicable to buried and embedded piping, while the surrogate ratios are developed using concrete characterization results. It is recommended that additional piping characterization results be used to re-evaluate piping surrogate relationships for use during FSS.

RSCS TSD 25-032 Rev 0 Page 64 of 86

Once the appropriate surrogate ratios are determined for an FSS survey unit, the DCGL of the measured (easy-to-detect) radionuclide (i.e., Cs-137) can be modified to account for the HTD radionuclide, according to the following equation from Section I.11.2 of MARSSIM.

Equation 7

,137 =

1 1

+

2 2 +

3 3 + +

where:

DCGLSurrogate, Cs-137

= modified DCGL for surrogate ratio DCGLETD

= DCGL for easy-to-detect radionuclide (Cs-137)

DCGLHTD

= DCGL for the hard-to-detect radionuclide (for radionuclide 2, 3,i)

Ri

= Surrogate ratio for the HTD to the ETD radionuclide(s)

In order to account for the IC dose adjustments developed in Section 2.4.3, and shown in Table 2-39, the DCGLs should also be multiplied times the IC adjustment factor applicable to the survey area/media.

3 Conclusions A series of evaluations were performed to determine the Radionuclides of Concern (ROCs) to be used during decommissioning and Final Status Surveys (the FSS ROCs) at OCS. An initial set of 21 potential ROCs were previously established in a BHI Energy TSD, Radionuclide Selection for DCGL Development Oyster Creek Station Site Characterization Project. Analyses of the fractional activities and dose contributions were performed for these 21 potential ROCs. A refined set of FSS ROCs were developed, which are summarized by sample-population/survey-area in Section 2.4.3 of this TSD. A set of surrogate ratios to address the hard-to-detect (HTD) radionuclides during FSS was also developed and is summarized in Section 2.5 of this TSD. Additional future characterization results may be used to confirm/refine mixture fractions, insignificant contributors to dose, or surrogate ratios for specific media/survey areas during FSS.

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4 References BHI. (2022). Technical Basis Document No. 20-6002-1362, Rev. 1 - Radionuclide Selection for DCGL Development Oyster Creek Station Site Characterization Project.

EnergySolutions. (2018). RS-TD-313196-001, Rev. 5, Radionuclides of Concern During LACBWR Decommissioning.

NRC. (2000). Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), NUREG-1575, Rev.1.

NRC. (2022). Consolidated Decommissioning Guidance, Characterization, Survey, and Determination of Radiological Criteria, NUREG-1757, Vol. 2, Rev. 2.

RSCS. (2021). TSD 21-043, Rev. 1, Radionuclides of Concern in Support of the Fort Calhoun License Termination Plan.

RSCS TSD 25-032 Rev 0 Page 66 of 86

5 Attachments.1 - Decay-Corrected Analytical Results for Concrete Samples, With Negative Values Reset to Zero.2 - All Concrete Samples Population Mixture Fractions.3 - Derived Concentration Guideline Levels (DCGLs)

RSCS TSD 25-032 Rev 0 Page 67 of 86

5.1 Decay-Corrected Analytical Results for Concrete Samples, With Negative Values Reset to Zero Table 5 Concrete Sample Analytical Results (pCi/g), First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-BSTK-CONC-001-0.0-B-QC 4.21E-01 3.32E+00 2.87E-01 1.36E+02 1.89E+02 0.00E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 1.76E+00 0.00E+00 3.95E-01 4.55E+03 1.82E+03 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 3.37E-02 0.00E+00 4.06E-02 1.89E+01 3.08E+01 0.00E+00 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 6.82E+00 4.44E-02 9.98E+00 5.27E+02 0.00E+00 RCA-NRWT-CONC-002-0.5-B-QC 4.52E-02 0.00E+00 3.01E-02 2.63E-01 2.07E+01 3.68E-02 RCA-NRWT-CONC-003-0.0-B-QC 5.34E-02 2.32E+00 0.00E+00 1.02E+00 2.68E+01 9.49E-04 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 6.10E+00 4.07E+01 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 1.63E-01 0.00E+00 0.00E+00 7.63E+00 7.21E+01 2.03E-01 RCA-NRWT-CONC-007-0.0-B-QC 7.73E-02 3.30E+00 1.24E-01 2.12E+03 4.10E+03 0.00E+00 RCA-NRWT-CONC-007-0.5-B-QC 1.05E-02 4.31E+00 0.00E+00 1.04E-01 5.04E+01 1.31E-01 RCA-RXB-CONC-002-0.0-B-QC 3.79E-01 3.49E-01 1.44E-01 4.60E+01 5.44E+03 0.00E+00 RCA-RXB-CONC-003-0.0-B-QC 3.14E-01 0.00E+00 0.00E+00 4.80E+01 2.77E+02 3.81E-01 RCA-RXB-CONC-004-0.0-B-D-QC 1.29E-01 3.61E-01 1.59E-01 2.67E+00 7.14E+01 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 3.56E+00 0.00E+00 7.45E-01 1.37E+02 5.52E-02 RCA-RXB-CONC-011-0.0-B-QC 5.27E-03 1.05E+00 7.30E-02 1.75E-01 4.11E+01 1.20E-02 RCA-RXB-CONC-012-0.0-B-D-QC 7.76E-02 2.69E+00 0.00E+00 1.41E+01 9.29E+02 1.34E+00 RCA-RXB-CONC-012-1.0-B-D-QC 1.68E-02 2.29E+00 5.70E-02 2.64E-02 9.17E+01 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 1.07E-01 0.00E+00 0.00E+00 4.50E+00 3.59E+02 0.00E+00 RCA-RXB-CONC-014-0.5-B-QC 2.54E-01 0.00E+00 0.00E+00 4.82E-02 5.10E+01 1.17E-01 RCA-RXB-CONC-019-0.0-B-QC 6.42E-03 0.00E+00 9.76E-02 1.24E+00 1.48E+02 6.24E-02 RCA-RXB-CONC-020-0.0-B-QC 2.49E-01 0.00E+00 0.00E+00 7.62E-01 4.17E+01 9.31E-03 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.31E-01 1.03E+02 0.00E+00 RCA-RXB-CONC-023-0.0-B-QC 6.65E-02 3.38E+00 0.00E+00 3.94E+01 5.90E+02 0.00E+00 RCA-RXB-CONC-023-0.5-B-QC 4.93E-03 5.35E+00 0.00E+00 2.66E-01 5.22E+01 4.54E-02 RCA-RXB-CONC-024-0.0-B-QC 6.40E-01 3.27E+00 0.00E+00 3.50E+01 8.93E+02 3.16E-01 RCA-RXB-CONC-024-0.5-B-QC 5.29E-02 2.56E+00 0.00E+00 5.06E-01 5.54E+01 8.54E-03 RCA-RXB-CONC-025-0.0-B-QC 6.07E-01 0.00E+00 7.08E-02 4.07E+01 6.07E+02 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 3.23E-01 6.95E+00 1.58E-02 2.68E+01 4.03E+02 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 7.47E-02 1.11E+00 0.00E+00 7.68E+01 2.48E+02 3.81E-02 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 6.37E+00 0.00E+00 5.73E+01 2.79E+02 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 1.34E-01 4.09E+00 7.90E-02 8.79E+01 3.82E+02 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 2.81E-01 0.00E+00 1.94E-01 1.73E+01 8.84E+02 8.30E-02 RCA-RXB-CONC-030-0.5-B-QC 3.29E-02 1.73E+00 0.00E+00 2.76E-01 2.07E+02 0.00E+00 RCA-RXB-CONC-032-0.0-B-QC 1.71E+00 6.56E+00 2.99E-01 4.02E+01 2.94E+03 1.07E-01 RCA-RXB-CONC-034-0.0-B-QC 4.21E-01 6.29E+00 2.10E-01 5.35E+01 5.34E+03 0.00E+00 RCA-RXB-CONC-035-0.0-B-QC 2.93E+00 4.35E+00 1.87E-01 9.39E+01 5.32E+02 0.00E+00 RCA-RXB-CONC-035-0.5-B-QC 1.86E-02 2.75E+00 0.00E+00 1.31E+00 8.97E+01 2.13E-01 RCA-RXB-CONC-036-0.0-B-QC 1.15E+01 2.79E+00 2.16E+00 1.63E+02 8.24E+02 6.76E-01 RCA-RXB-CONC-037-0.0-B-QC 1.37E-01 0.00E+00 0.00E+00 1.85E+01 5.04E+01 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 1.47E+00 0.00E+00 0.00E+00 5.36E+01 3.46E+02 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.23E-01 3.14E+00 0.00E+00 4.23E+00 7.18E+02 2.64E-01 RCA-RXB-CONC-041-0.0-B-QC 1.26E-01 4.63E-01 3.43E-02 7.08E+00 2.70E+02 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 9.12E-01 1.81E+00 7.72E-02 3.87E+01 7.05E+02 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 5.28E-01 4.62E+00 3.92E-02 1.85E+01 1.90E+03 4.17E-01 RCA-RXB-CONC-048-0.0-B-QC 6.63E-01 4.24E+00 1.19E-02 3.89E+01 9.78E+02 0.00E+00 RCA-RXBT-CONC-001-0.0-B-D-QC 1.75E-01 1.31E+01 0.00E+00 5.41E+00 4.07E+01 0.00E+00 RCA-RXBT-CONC-002-0.0-B-QC 1.42E-01 4.69E+00 3.08E-02 1.62E-02 4.73E-01 3.15E-02 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 1.68E+01 0.00E+00 3.02E+00 5.01E+01 7.55E-02 RCA-TURB-CONC-033-0.5-B-I-QC 2.45E-02 1.58E+00 0.00E+00 0.00E+00 7.19E-01 2.23E-02 RSCS TSD 25-032 Rev 0 Page 68 of 86

Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-TURB-CONC-033-1.0-B-I-QC 5.16E-02 0.00E+00 3.21E-02 0.00E+00 9.87E-02 6.40E-03 RCA-TURB-CONC-033-1.5-B-I-QC 1.53E-01 0.00E+00 0.00E+00 0.00E+00 9.29E-02 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.06E-01 1.41E+00 3.38E-02 2.31E+00 5.99E+01 3.51E-01 RCA-TURT-CONC-003-0.0-B-QC 1.20E-01 0.00E+00 3.04E-02 1.10E+00 3.05E+01 1.13E-01 RCA-TURT-CONC-005-0.0-B-QC 1.66E-01 0.00E+00 0.00E+00 6.27E-01 5.86E+01 0.00E+00 RCA-TURT-CONC-005-0.5-B-QC 4.38E-02 8.02E+00 2.54E-02 4.45E-02 5.46E+00 7.17E-02 RCA-TURT-CONC-007-0.0-B-D-QC 5.05E-02 4.95E+00 0.00E+00 1.17E+00 1.74E+01 6.97E-02 RCA-TURT-CONC-007-0.5-B-D-QC 1.93E-01 5.50E+00 2.91E-03 5.35E-02 5.02E+00 1.04E-02 RCA-TURT-CONC-009-0.0-B-QC 1.85E-01 6.79E+00 0.00E+00 2.91E+00 3.56E+01 0.00E+00 Average Activity 4.87E-01 2.84E+00 8.60E-02 1.36E+02 5.89E+02 9.08E-02 RSCS TSD 25-032 Rev 0 Page 69 of 86

Table 5 Concrete Sample Analytical Results (pCi/g), Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-BSTK-CONC-001-0.0-B-QC 1.23E-01 1.48E+02 2.07E+00 2.04E-01 0.00E+00 7.03E+01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 6.75E+03 8.76E+01 4.93E+00 0.00E+00 5.91E+05 RCA-BSTK-CONC-004-0.0-B-QC 2.81E-02 1.09E+01 0.00E+00 0.00E+00 0.00E+00 4.97E+00 RCA-NRWT-CONC-002-0.0-B-QC 6.92E-02 0.00E+00 1.61E-01 1.28E-02 2.99E-04 7.02E+00 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 1.05E+01 6.50E-01 4.01E-03 6.52E-02 0.00E+00 RCA-NRWT-CONC-003-0.0-B-QC 9.47E-02 3.78E-01 4.47E-01 0.00E+00 0.00E+00 2.68E+00 RCA-NRWT-CONC-005-0.0-B-QC 1.28E-02 1.02E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 8.68E-02 1.71E+00 4.62E-01 1.85E-03 0.00E+00 4.91E+00 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 4.42E+02 0.00E+00 1.44E+00 0.00E+00 1.35E+02 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 1.39E-03 0.00E+00 0.00E+00 RCA-RXB-CONC-002-0.0-B-QC 0.00E+00 2.37E+01 1.13E+01 0.00E+00 0.00E+00 2.38E+01 RCA-RXB-CONC-003-0.0-B-QC 2.02E-01 0.00E+00 0.00E+00 0.00E+00 1.09E-01 6.46E+01 RCA-RXB-CONC-004-0.0-B-D-QC 5.57E-02 0.00E+00 0.00E+00 0.00E+00 1.78E-02 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 4.37E-02 0.00E+00 0.00E+00 1.34E-03 0.00E+00 4.20E+00 RCA-RXB-CONC-011-0.0-B-QC 4.57E-02 0.00E+00 0.00E+00 2.05E-03 0.00E+00 0.00E+00 RCA-RXB-CONC-012-0.0-B-D-QC 5.28E-01 0.00E+00 0.00E+00 1.60E-02 7.06E-02 3.04E+01 RCA-RXB-CONC-012-1.0-B-D-QC 1.86E-03 1.16E+01 4.60E-01 7.97E-04 2.85E-02 2.57E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 0.00E+00 1.18E+00 1.46E-03 9.70E-04 2.06E+00 RCA-RXB-CONC-014-0.5-B-QC 1.19E-02 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 5.07E-03 8.12E-03 2.77E+00 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.65E-02 0.00E+00 RCA-RXB-CONC-020-0.5-B-QC 1.79E-02 2.55E+00 0.00E+00 2.15E-03 1.73E-02 3.90E+00 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 2.51E+01 6.04E+00 2.64E-03 0.00E+00 6.68E+00 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 6.90E+00 0.00E+00 4.23E-03 0.00E+00 2.90E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 0.00E+00 1.48E+00 8.36E-03 3.44E-02 9.50E+00 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 0.00E+00 6.23E+00 1.15E-04 1.24E-02 2.82E+00 RCA-RXB-CONC-025-0.0-B-QC 5.04E-02 0.00E+00 0.00E+00 1.60E-03 0.00E+00 1.88E+01 RCA-RXB-CONC-026-0.0-B-D-QC 9.68E-02 1.96E+01 6.92E+00 1.42E-02 1.35E-01 1.28E+01 RCA-RXB-CONC-027-0.0-B-QC 6.94E-02 1.95E+01 3.84E+00 6.83E-03 0.00E+00 2.13E+01 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 3.41E+01 6.93E+00 1.44E-02 8.38E-02 9.74E+00 RCA-RXB-CONC-029-0.0-B-QC 2.54E-01 2.03E+01 2.91E+00 1.52E-02 0.00E+00 1.98E+01 RCA-RXB-CONC-030-0.0-B-QC 6.52E-02 1.18E+01 0.00E+00 1.21E-02 4.44E-02 1.43E+01 RCA-RXB-CONC-030-0.5-B-QC 4.44E-02 2.90E+00 0.00E+00 0.00E+00 1.01E-02 1.72E+01 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 9.30E+00 5.97E-01 0.00E+00 1.54E-01 5.52E+00 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 1.05E+01 8.12E+00 0.00E+00 8.80E-02 1.31E+01 RCA-RXB-CONC-035-0.0-B-QC 0.00E+00 1.44E+01 0.00E+00 3.22E-02 1.58E-01 1.44E+01 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.15E-01 0.00E+00 7.89E-03 9.61E+00 RCA-RXB-CONC-036-0.0-B-QC 2.39E-01 7.24E+01 3.43E+00 1.13E-02 5.11E-01 5.92E+01 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 0.00E+00 9.50E+00 1.32E-02 0.00E+00 1.17E+01 RCA-RXB-CONC-038-0.0-B-QC 8.73E-02 0.00E+00 6.86E+00 3.63E-03 0.00E+00 1.06E+01 RCA-RXB-CONC-040-0.0-B-QC 2.82E-02 0.00E+00 3.33E+00 0.00E+00 7.16E-02 5.18E+00 RCA-RXB-CONC-041-0.0-B-QC 4.48E-03 2.05E+01 1.19E+01 0.00E+00 6.60E-02 1.15E+01 RCA-RXB-CONC-043-0.0-B-QC 0.00E+00 0.00E+00 1.81E+00 2.45E-02 1.59E-01 7.49E+00 RCA-RXB-CONC-046-0.0-B-QC 0.00E+00 5.28E+00 0.00E+00 6.12E-03 0.00E+00 2.07E+01 RCA-RXB-CONC-048-0.0-B-QC 0.00E+00 5.38E+00 7.85E+00 2.29E-02 0.00E+00 1.12E+01 RCA-RXBT-CONC-001-0.0-B-D-QC 1.24E-01 5.13E+00 0.00E+00 5.51E-03 1.76E-02 8.63E+00 RCA-RXBT-CONC-002-0.0-B-QC 1.81E-01 0.00E+00 1.87E+00 0.00E+00 3.21E-02 0.00E+00 RCA-RXBT-CONC-003-0.0-B-QC 3.11E-01 0.00E+00 2.27E+00 5.06E-03 5.35E-02 1.27E+01 RCA-TURB-CONC-033-0.5-B-I-QC 1.75E-02 1.14E+00 1.40E+01 4.56E-04 4.50E-03 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 0.00E+00 1.28E+01 0.00E+00 8.79E-03 8.42E+00 RCA-TURB-CONC-033-1.5-B-I-QC 1.60E-02 2.42E+00 1.84E+00 1.26E-03 1.17E-02 3.83E+00 RCA-TURT-CONC-001-0.0-B-QC 0.00E+00 4.23E+01 0.00E+00 5.58E-04 0.00E+00 7.05E+00 RCA-TURT-CONC-003-0.0-B-QC 9.37E-02 0.00E+00 0.00E+00 0.00E+00 0.00E+00 7.85E+00 RSCS TSD 25-032 Rev 0 Page 70 of 86

Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-TURT-CONC-005-0.0-B-QC 1.35E-01 0.00E+00 0.00E+00 7.80E-03 0.00E+00 8.47E-01 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 4.10E-01 8.67E-01 0.00E+00 0.00E+00 6.94E+00 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 0.00E+00 2.37E+00 1.22E-02 2.57E-02 7.80E+00 RCA-TURT-CONC-007-0.5-B-D-QC 3.52E-02 5.35E+00 0.00E+00 1.30E-03 0.00E+00 7.64E+00 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.06E-02 7.88E+00 Average Activity 5.47E-02 1.34E+02 3.93E+00 1.18E-01 3.54E-02 1.02E+04 RSCS TSD 25-032 Rev 0 Page 71 of 86

Table 5 Concrete Sample Analytical Results (pCi/g), Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-BSTK-CONC-001-0.0-B-QC 0.00E+00 1.93E-01 1.39E-01 0.00E+00 2.04E-02 2.28E+00 1.71E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 5.64E-01 9.25E-01 4.83E-01 0.00E+00 0.00E+00 2.35E+01 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 6.09E-03 6.64E-02 0.00E+00 3.34E+00 0.00E+00 1.29E+00 8.69E-01 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 3.61E-02 8.72E+00 1.12E-01 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 2.87E-02 6.79E-02 2.89E+00 0.00E+00 0.00E+00 4.17E-01 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 0.00E+00 5.35E-02 1.02E+01 1.48E-02 7.41E-01 1.09E-02 RCA-NRWT-CONC-005-0.0-B-QC 3.28E-02 3.49E-02 2.85E-02 0.00E+00 3.67E-02 5.25E-01 3.54E-01 RCA-NRWT-CONC-006-0.0-B-QC 5.40E-04 2.32E-03 1.66E-02 6.12E+00 0.00E+00 2.05E-01 0.00E+00 RCA-NRWT-CONC-007-0.0-B-QC 1.28E-02 0.00E+00 7.83E-02 3.17E+00 0.00E+00 7.53E+00 4.02E+00 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 2.00E+00 1.15E-01 1.25E+00 7.96E-02 RCA-RXB-CONC-002-0.0-B-QC 1.25E-02 7.41E-02 1.51E-01 8.69E+00 1.52E+00 3.18E+01 3.65E-02 RCA-RXB-CONC-003-0.0-B-QC 1.66E-03 1.89E-01 2.17E-01 4.47E+00 3.30E-01 9.38E-01 6.34E-01 RCA-RXB-CONC-004-0.0-B-D-QC 4.84E-03 3.14E-02 0.00E+00 1.83E+01 1.15E-01 5.65E-02 1.21E-01 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 5.42E-03 5.26E-02 0.00E+00 1.04E-01 4.34E-02 0.00E+00 RCA-RXB-CONC-011-0.0-B-QC 1.62E-03 0.00E+00 2.90E-02 9.91E-01 3.42E-02 2.74E-02 1.91E-01 RCA-RXB-CONC-012-0.0-B-D-QC 3.65E-03 3.76E-02 2.27E-02 0.00E+00 0.00E+00 4.62E+00 9.26E-01 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 5.96E-02 0.00E+00 3.15E+00 0.00E+00 2.97E-02 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 8.08E-02 0.00E+00 1.13E+01 1.36E-01 3.19E+00 6.15E-01 RCA-RXB-CONC-014-0.5-B-QC 1.14E-02 9.58E-02 2.27E-02 8.60E-01 0.00E+00 4.72E-01 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 2.33E-03 0.00E+00 2.12E-02 1.22E+00 9.76E-02 0.00E+00 1.86E-01 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 3.23E-02 0.00E+00 0.00E+00 0.00E+00 1.87E-01 3.69E-01 RCA-RXB-CONC-020-0.5-B-QC 1.44E-02 1.01E-01 2.49E-02 0.00E+00 0.00E+00 6.93E-02 1.35E-01 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.63E+00 1.26E-01 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 0.00E+00 2.27E-02 9.31E-01 0.00E+00 1.50E-02 0.00E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 8.16E-02 2.22E-02 5.37E+00 0.00E+00 4.37E+00 0.00E+00 RCA-RXB-CONC-024-0.5-B-QC 1.46E-02 0.00E+00 1.07E-01 1.00E+01 1.13E-01 9.07E-01 4.50E-02 RCA-RXB-CONC-025-0.0-B-QC 2.18E-03 2.66E-01 6.27E-02 1.73E+01 7.99E-01 3.28E+00 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 0.00E+00 6.41E-03 3.55E+00 3.11E-01 1.63E+00 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 0.00E+00 3.70E-02 5.73E-02 2.50E+00 4.27E-02 4.06E-01 0.00E+00 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.69E-01 3.67E-01 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 2.42E-04 5.56E-02 1.39E-02 1.23E+01 0.00E+00 5.70E-01 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 7.23E-02 1.01E-01 7.06E+00 0.00E+00 1.08E+00 4.58E-01 RCA-RXB-CONC-030-0.5-B-QC 9.97E-03 0.00E+00 0.00E+00 5.01E+00 7.36E-02 1.08E-01 8.37E-02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 6.75E-01 0.00E+00 8.51E-01 0.00E+00 6.69E+00 1.91E-01 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 2.78E-01 1.03E-01 1.27E+01 0.00E+00 2.15E+01 9.08E-01 RCA-RXB-CONC-035-0.0-B-QC 3.05E-03 1.27E+00 7.87E-01 9.13E+00 7.45E-01 4.18E+00 6.29E-01 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.67E-02 3.50E+00 1.70E-01 3.84E-02 1.57E-01 RCA-RXB-CONC-036-0.0-B-QC 2.04E-03 2.72E+00 2.80E+00 2.76E+01 2.79E-02 4.42E+01 0.00E+00 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 1.16E-01 3.75E-02 6.91E+00 3.34E-01 9.47E+00 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 3.99E-02 3.25E-01 3.97E-01 1.32E+01 5.48E-03 0.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.33E-03 1.73E-01 7.68E-03 4.91E+00 0.00E+00 2.31E+00 0.00E+00 RCA-RXB-CONC-041-0.0-B-QC 0.00E+00 1.02E-01 6.50E-02 3.29E+00 0.00E+00 1.47E+00 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.17E-02 1.22E-01 2.71E-02 1.74E+01 0.00E+00 6.32E+00 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 2.49E-02 2.15E-01 2.96E-01 0.00E+00 0.00E+00 1.33E+01 0.00E+00 RCA-RXB-CONC-048-0.0-B-QC 3.57E-03 1.78E-01 3.57E-01 7.42E+00 0.00E+00 6.31E+00 5.00E-01 RCA-RXBT-CONC-001-0.0-B-D-QC 0.00E+00 3.35E-02 9.73E-02 9.66E+00 1.03E-01 5.00E-01 2.18E-01 RCA-RXBT-CONC-002-0.0-B-QC 0.00E+00 3.04E-02 4.85E-02 2.73E+00 5.48E-02 0.00E+00 3.64E-02 RCA-RXBT-CONC-003-0.0-B-QC 2.25E-03 5.00E-02 0.00E+00 0.00E+00 0.00E+00 8.40E-01 0.00E+00 RCA-TURB-CONC-033-0.5-B-I-QC 0.00E+00 2.74E-02 6.14E-02 4.57E+00 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 3.59E-03 5.40E-02 8.01E-04 5.37E+00 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.5-B-I-QC 2.10E-03 4.18E-02 4.96E-02 2.41E+01 5.54E-03 4.18E-02 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.81E-02 7.73E-02 9.08E-02 0.00E+00 0.00E+00 7.09E-02 2.46E-01 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 2.67E-02 6.84E-03 1.88E+00 0.00E+00 3.87E-01 0.00E+00 RSCS TSD 25-032 Rev 0 Page 72 of 86

Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-TURT-CONC-005-0.0-B-QC 6.95E-03 1.43E-02 1.13E-01 0.00E+00 0.00E+00 8.24E-01 3.45E-01 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 5.97E-02 0.00E+00 3.49E-01 5.19E-02 1.52E-01 5.26E-01 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 1.81E-02 7.09E-02 2.94E-01 2.14E-01 6.79E-01 2.32E-01 RCA-TURT-CONC-007-0.5-B-D-QC 0.00E+00 2.67E-03 1.26E-02 2.83E+00 3.71E-02 0.00E+00 1.13E-01 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 7.25E-02 7.82E-02 1.23E-01 8.87E-02 6.79E-01 1.80E-01 Average Activity 1.41E-02 1.58E-01 1.26E-01 5.16E+00 1.07E-01 3.83E+00 2.72E-01 RSCS TSD 25-032 Rev 0 Page 73 of 86

5.2 All Concrete Samples Population Mixture Fractions A series of 58 concrete samples were evaluated from the concrete structure areas indicated in Table 2-2 and shown in Figure 2-1. Table 5-4 through Table 5-6 provide the radionuclide activity fractions for all concrete samples as a single population. The activity fraction data are subdivided into three tables to allow for convenient inspection of all 21 radionuclides. The last three rows of these tables provide the average fraction, the 75th percentile of each fractional data set, and the normalized 75th percentile data set as described in Section 2.4.1 above. Table 5-7 through Table 5-9 provide the radionuclide activity ratios to Cs-137 for all concrete samples as a single population. Similar to the activity fraction tables, the Cs-137 ratio data are also subdivided into three tables to allow for convenient inspection of all 21 radionuclides. The last two rows of these tables provide the 75th percentile of each ratio data set, and the normalized 75th percentile data set as described in Section 2.4.1 above.

RSCS TSD 25-032 Rev 0 Page 74 of 86

Table 5 All Concrete Sample Activity Fractions, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-BSTK-CONC-001-0.0-B-QC 7.60E-04 5.99E-03 5.18E-04 2.45E-01 3.41E-01 0.00E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 2.92E-06 0.00E+00 6.55E-07 7.54E-03 3.01E-03 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 4.73E-04 0.00E+00 5.70E-04 2.66E-01 4.32E-01 0.00E+00 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 1.22E-02 7.93E-05 1.78E-02 9.41E-01 0.00E+00 RCA-NRWT-CONC-002-0.5-B-QC 1.27E-03 0.00E+00 8.44E-04 7.37E-03 5.80E-01 1.03E-03 RCA-NRWT-CONC-003-0.0-B-QC 1.19E-03 5.17E-02 0.00E+00 2.27E-02 5.99E-01 2.12E-05 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 1.05E-01 7.01E-01 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 1.75E-03 0.00E+00 0.00E+00 8.16E-02 7.70E-01 2.17E-03 RCA-NRWT-CONC-007-0.0-B-QC 1.13E-05 4.84E-04 1.82E-05 3.11E-01 6.02E-01 0.00E+00 RCA-NRWT-CONC-007-0.5-B-QC 1.80E-04 7.37E-02 0.00E+00 1.79E-03 8.63E-01 2.24E-03 RCA-RXB-CONC-002-0.0-B-QC 6.78E-05 6.25E-05 2.58E-05 8.24E-03 9.74E-01 0.00E+00 RCA-RXB-CONC-003-0.0-B-QC 7.88E-04 0.00E+00 0.00E+00 1.21E-01 6.97E-01 9.58E-04 RCA-RXB-CONC-004-0.0-B-D-QC 1.38E-03 3.86E-03 1.70E-03 2.85E-02 7.64E-01 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 2.44E-02 0.00E+00 5.11E-03 9.40E-01 3.79E-04 RCA-RXB-CONC-011-0.0-B-QC 1.21E-04 2.40E-02 1.67E-03 3.99E-03 9.40E-01 2.73E-04 RCA-RXB-CONC-012-0.0-B-D-QC 7.89E-05 2.73E-03 0.00E+00 1.44E-02 9.44E-01 1.36E-03 RCA-RXB-CONC-012-1.0-B-D-QC 1.50E-04 2.04E-02 5.08E-04 2.35E-04 8.18E-01 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 2.79E-04 0.00E+00 0.00E+00 1.18E-02 9.39E-01 0.00E+00 RCA-RXB-CONC-014-0.5-B-QC 4.81E-03 0.00E+00 0.00E+00 9.10E-04 9.64E-01 2.21E-03 RCA-RXB-CONC-019-0.0-B-QC 4.17E-05 0.00E+00 6.34E-04 8.03E-03 9.63E-01 4.05E-04 RCA-RXB-CONC-020-0.0-B-QC 5.74E-03 0.00E+00 0.00E+00 1.76E-02 9.62E-01 2.15E-04 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.00E-03 9.35E-01 0.00E+00 RCA-RXB-CONC-023-0.0-B-QC 9.89E-05 5.03E-03 0.00E+00 5.86E-02 8.77E-01 0.00E+00 RCA-RXB-CONC-023-0.5-B-QC 7.18E-05 7.79E-02 0.00E+00 3.87E-03 7.60E-01 6.62E-04 RCA-RXB-CONC-024-0.0-B-QC 6.72E-04 3.43E-03 0.00E+00 3.67E-02 9.37E-01 3.31E-04 RCA-RXB-CONC-024-0.5-B-QC 6.72E-04 3.25E-02 0.00E+00 6.42E-03 7.03E-01 1.08E-04 RCA-RXB-CONC-025-0.0-B-QC 8.81E-04 0.00E+00 1.03E-04 5.91E-02 8.81E-01 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 6.70E-04 1.44E-02 3.27E-05 5.55E-02 8.36E-01 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 2.00E-04 2.97E-03 0.00E+00 2.06E-01 6.63E-01 1.02E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 1.61E-02 0.00E+00 1.45E-01 7.08E-01 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 2.53E-04 7.71E-03 1.49E-04 1.66E-01 7.20E-01 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 3.00E-04 0.00E+00 2.07E-04 1.85E-02 9.44E-01 8.87E-05 RCA-RXB-CONC-030-0.5-B-QC 1.40E-04 7.38E-03 0.00E+00 1.18E-03 8.83E-01 0.00E+00 RCA-RXB-CONC-032-0.0-B-QC 5.66E-04 2.17E-03 9.92E-05 1.33E-02 9.76E-01 3.54E-05 RCA-RXB-CONC-034-0.0-B-QC 7.71E-05 1.15E-03 3.84E-05 9.80E-03 9.77E-01 0.00E+00 RCA-RXB-CONC-035-0.0-B-QC 4.32E-03 6.40E-03 2.75E-04 1.38E-01 7.83E-01 0.00E+00 RCA-RXB-CONC-035-0.5-B-QC 1.73E-04 2.56E-02 0.00E+00 1.21E-02 8.34E-01 1.98E-03 RCA-RXB-CONC-036-0.0-B-QC 9.44E-03 2.29E-03 1.78E-03 1.34E-01 6.77E-01 5.55E-04 RCA-RXB-CONC-037-0.0-B-QC 1.28E-03 0.00E+00 0.00E+00 1.73E-01 4.70E-01 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 3.41E-03 0.00E+00 0.00E+00 1.24E-01 8.00E-01 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.66E-04 4.23E-03 0.00E+00 5.70E-03 9.68E-01 3.56E-04 RCA-RXB-CONC-041-0.0-B-QC 3.85E-04 1.42E-03 1.05E-04 2.17E-02 8.27E-01 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.17E-03 2.32E-03 9.90E-05 4.97E-02 9.04E-01 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 2.69E-04 2.35E-03 2.00E-05 9.40E-03 9.67E-01 2.13E-04 RCA-RXB-CONC-048-0.0-B-QC 6.25E-04 3.99E-03 1.12E-05 3.66E-02 9.22E-01 0.00E+00 RCA-RXBT-CONC-001-0.0-B-D-QC 2.09E-03 1.56E-01 0.00E+00 6.44E-02 4.85E-01 0.00E+00 RCA-RXBT-CONC-002-0.0-B-QC 1.37E-02 4.53E-01 2.97E-03 1.56E-03 4.56E-02 3.04E-03 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 1.95E-01 0.00E+00 3.50E-02 5.81E-01 8.75E-04 RCA-TURB-CONC-033-0.5-B-I-QC 1.10E-03 7.12E-02 0.00E+00 0.00E+00 3.24E-02 1.01E-03 RCA-TURB-CONC-033-1.0-B-I-QC 1.92E-03 0.00E+00 1.20E-03 0.00E+00 3.68E-03 2.39E-04 RCA-TURB-CONC-033-1.5-B-I-QC 4.70E-03 0.00E+00 0.00E+00 0.00E+00 2.85E-03 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 9.34E-04 1.24E-02 2.97E-04 2.02E-02 5.26E-01 3.08E-03 RCA-TURT-CONC-003-0.0-B-QC 2.86E-03 0.00E+00 7.22E-04 2.60E-02 7.24E-01 2.68E-03 RSCS TSD 25-032 Rev 0 Page 75 of 86

Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-TURT-CONC-005-0.0-B-QC 2.69E-03 0.00E+00 0.00E+00 1.02E-02 9.50E-01 0.00E+00 RCA-TURT-CONC-005-0.5-B-QC 1.90E-03 3.48E-01 1.10E-03 1.93E-03 2.37E-01 3.11E-03 RCA-TURT-CONC-007-0.0-B-D-QC 1.43E-03 1.40E-01 0.00E+00 3.31E-02 4.93E-01 1.97E-03 RCA-TURT-CONC-007-0.5-B-D-QC 7.20E-03 2.05E-01 1.09E-04 2.00E-03 1.87E-01 3.89E-04 RCA-TURT-CONC-009-0.0-B-QC 3.38E-03 1.24E-01 0.00E+00 5.33E-02 6.52E-01 0.00E+00 Average (fAi,j,k,avg) 1.53E-03 3.70E-02 2.74E-04 5.20E-02 7.00E-01 5.53E-04 75 Percentile Fraction (fi,j,k,.75) 1.67E-03 2.31E-02 1.93E-04 5.90E-02 9.39E-01 6.36E-04 75 Perc. Norm. Frac. (fAi,k,.75) 1.38E-03 1.92E-02 1.60E-04 4.89E-02 7.79E-01 5.28E-04 RSCS TSD 25-032 Rev 0 Page 76 of 86

Table 5 All Concrete Sample Activity Fractions, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-BSTK-CONC-001-0.0-B-QC 2.22E-04 2.67E-01 3.74E-03 3.67E-04 0.00E+00 1.27E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 1.12E-02 1.45E-04 8.16E-06 0.00E+00 9.78E-01 RCA-BSTK-CONC-004-0.0-B-QC 3.95E-04 1.53E-01 0.00E+00 0.00E+00 0.00E+00 6.97E-02 RCA-NRWT-CONC-002-0.0-B-QC 1.24E-04 0.00E+00 2.88E-04 2.29E-05 5.34E-07 1.25E-02 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 2.94E-01 1.82E-02 1.12E-04 1.83E-03 0.00E+00 RCA-NRWT-CONC-003-0.0-B-QC 2.11E-03 8.44E-03 9.98E-03 0.00E+00 0.00E+00 5.98E-02 RCA-NRWT-CONC-005-0.0-B-QC 2.19E-04 1.76E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 9.28E-04 1.83E-02 4.94E-03 1.97E-05 0.00E+00 5.24E-02 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 6.49E-02 0.00E+00 2.12E-04 0.00E+00 1.98E-02 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 2.38E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-002-0.0-B-QC 0.00E+00 4.24E-03 2.01E-03 0.00E+00 0.00E+00 4.26E-03 RCA-RXB-CONC-003-0.0-B-QC 5.07E-04 0.00E+00 0.00E+00 0.00E+00 2.74E-04 1.62E-01 RCA-RXB-CONC-004-0.0-B-D-QC 5.97E-04 0.00E+00 0.00E+00 0.00E+00 1.90E-04 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 3.00E-04 0.00E+00 0.00E+00 9.20E-06 0.00E+00 2.88E-02 RCA-RXB-CONC-011-0.0-B-QC 1.05E-03 0.00E+00 0.00E+00 4.70E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-012-0.0-B-D-QC 5.37E-04 0.00E+00 0.00E+00 1.62E-05 7.18E-05 3.09E-02 RCA-RXB-CONC-012-1.0-B-D-QC 1.66E-05 1.04E-01 4.10E-03 7.11E-06 2.54E-04 2.30E-02 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 0.00E+00 3.08E-03 3.82E-06 2.54E-06 5.39E-03 RCA-RXB-CONC-014-0.5-B-QC 2.24E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 3.29E-05 5.28E-05 1.80E-02 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.11E-04 0.00E+00 RCA-RXB-CONC-020-0.5-B-QC 1.62E-04 2.30E-02 0.00E+00 1.94E-05 1.56E-04 3.52E-02 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 3.73E-02 8.99E-03 3.93E-06 0.00E+00 9.94E-03 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 1.01E-01 0.00E+00 6.17E-05 0.00E+00 4.22E-02 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 0.00E+00 1.55E-03 8.77E-06 3.61E-05 9.96E-03 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 0.00E+00 7.91E-02 1.46E-06 1.57E-04 3.58E-02 RCA-RXB-CONC-025-0.0-B-QC 7.32E-05 0.00E+00 0.00E+00 2.32E-06 0.00E+00 2.73E-02 RCA-RXB-CONC-026-0.0-B-D-QC 2.01E-04 4.06E-02 1.43E-02 2.93E-05 2.80E-04 2.66E-02 RCA-RXB-CONC-027-0.0-B-QC 1.86E-04 5.21E-02 1.03E-02 1.83E-05 0.00E+00 5.71E-02 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 8.64E-02 1.76E-02 3.65E-05 2.12E-04 2.47E-02 RCA-RXB-CONC-029-0.0-B-QC 4.79E-04 3.83E-02 5.48E-03 2.87E-05 0.00E+00 3.73E-02 RCA-RXB-CONC-030-0.0-B-QC 6.96E-05 1.26E-02 0.00E+00 1.30E-05 4.74E-05 1.53E-02 RCA-RXB-CONC-030-0.5-B-QC 1.89E-04 1.24E-02 0.00E+00 0.00E+00 4.31E-05 7.36E-02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 3.08E-03 1.98E-04 0.00E+00 5.11E-05 1.83E-03 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 1.93E-03 1.49E-03 0.00E+00 1.61E-05 2.40E-03 RCA-RXB-CONC-035-0.0-B-QC 0.00E+00 2.13E-02 0.00E+00 4.74E-05 2.33E-04 2.12E-02 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.07E-03 0.00E+00 7.33E-05 8.94E-02 RCA-RXB-CONC-036-0.0-B-QC 1.97E-04 5.95E-02 2.82E-03 9.26E-06 4.20E-04 4.87E-02 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 0.00E+00 8.86E-02 1.23E-04 0.00E+00 1.10E-01 RCA-RXB-CONC-038-0.0-B-QC 2.02E-04 0.00E+00 1.59E-02 8.39E-06 0.00E+00 2.45E-02 RCA-RXB-CONC-040-0.0-B-QC 3.80E-05 0.00E+00 4.49E-03 0.00E+00 9.65E-05 6.98E-03 RCA-RXB-CONC-041-0.0-B-QC 1.37E-05 6.27E-02 3.66E-02 0.00E+00 2.02E-04 3.51E-02 RCA-RXB-CONC-043-0.0-B-QC 0.00E+00 0.00E+00 2.32E-03 3.14E-05 2.04E-04 9.60E-03 RCA-RXB-CONC-046-0.0-B-QC 0.00E+00 2.69E-03 0.00E+00 3.12E-06 0.00E+00 1.05E-02 RCA-RXB-CONC-048-0.0-B-QC 0.00E+00 5.07E-03 7.40E-03 2.15E-05 0.00E+00 1.05E-02 RCA-RXBT-CONC-001-0.0-B-D-QC 1.47E-03 6.12E-02 0.00E+00 6.56E-05 2.10E-04 1.03E-01 RCA-RXBT-CONC-002-0.0-B-QC 1.75E-02 0.00E+00 1.80E-01 0.00E+00 3.10E-03 0.00E+00 RCA-RXBT-CONC-003-0.0-B-QC 3.61E-03 0.00E+00 2.63E-02 5.86E-05 6.20E-04 1.48E-01 RCA-TURB-CONC-033-0.5-B-I-QC 7.90E-04 5.12E-02 6.32E-01 2.06E-05 2.03E-04 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 0.00E+00 4.76E-01 0.00E+00 3.28E-04 3.14E-01 RCA-TURB-CONC-033-1.5-B-I-QC 4.92E-04 7.43E-02 5.64E-02 3.87E-05 3.59E-04 1.17E-01 RCA-TURT-CONC-001-0.0-B-QC 0.00E+00 3.71E-01 0.00E+00 4.89E-06 0.00E+00 6.18E-02 RCA-TURT-CONC-003-0.0-B-QC 2.23E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.87E-01 RSCS TSD 25-032 Rev 0 Page 77 of 86

Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-TURT-CONC-005-0.0-B-QC 2.19E-03 0.00E+00 0.00E+00 1.26E-04 0.00E+00 1.37E-02 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 1.78E-02 3.77E-02 0.00E+00 0.00E+00 3.02E-01 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 0.00E+00 6.68E-02 3.44E-04 7.26E-04 2.21E-01 RCA-TURT-CONC-007-0.5-B-D-QC 1.31E-03 2.00E-01 0.00E+00 4.85E-05 0.00E+00 2.85E-01 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 3.77E-04 1.44E-01 Average (fAi,j,k,avg) 6.66E-04 4.20E-02 3.14E-02 3.55E-05 1.97E-04 7.33E-02 75 Percentile Fraction (fi,j,k,.75) 4.58E-04 5.19E-02 1.02E-02 3.25E-05 2.08E-04 7.26E-02 75 Perc. Norm. Frac. (fAi,k,.75) 3.80E-04 4.31E-02 8.46E-03 2.70E-05 1.73E-04 6.03E-02 RSCS TSD 25-032 Rev 0 Page 78 of 86

Table 5 All Concrete Sample Activity Fractions, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-BSTK-CONC-001-0.0-B-QC 0.00E+00 3.49E-04 2.51E-04 0.00E+00 3.68E-05 4.11E-03 3.09E-03 RCA-BSTK-CONC-003-0.0-B-D-QC 9.34E-07 1.53E-06 8.00E-07 0.00E+00 0.00E+00 3.89E-05 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 8.55E-05 9.32E-04 0.00E+00 4.69E-02 0.00E+00 1.81E-02 1.22E-02 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.46E-05 1.56E-02 2.00E-04 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 8.04E-04 1.90E-03 8.10E-02 0.00E+00 0.00E+00 1.17E-02 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 0.00E+00 1.19E-03 2.27E-01 3.30E-04 1.65E-02 2.43E-04 RCA-NRWT-CONC-005-0.0-B-QC 5.65E-04 6.00E-04 4.91E-04 0.00E+00 6.32E-04 9.04E-03 6.09E-03 RCA-NRWT-CONC-006-0.0-B-QC 5.77E-06 2.48E-05 1.77E-04 6.54E-02 0.00E+00 2.20E-03 0.00E+00 RCA-NRWT-CONC-007-0.0-B-QC 1.88E-06 0.00E+00 1.15E-05 4.65E-04 0.00E+00 1.10E-03 5.90E-04 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.43E-02 1.96E-03 2.15E-02 1.36E-03 RCA-RXB-CONC-002-0.0-B-QC 2.24E-06 1.33E-05 2.70E-05 1.56E-03 2.72E-04 5.70E-03 6.54E-06 RCA-RXB-CONC-003-0.0-B-QC 4.17E-06 4.76E-04 5.45E-04 1.12E-02 8.29E-04 2.36E-03 1.59E-03 RCA-RXB-CONC-004-0.0-B-D-QC 5.18E-05 3.36E-04 0.00E+00 1.96E-01 1.24E-03 6.05E-04 1.29E-03 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 3.72E-05 3.61E-04 0.00E+00 7.15E-04 2.98E-04 0.00E+00 RCA-RXB-CONC-011-0.0-B-QC 3.71E-05 0.00E+00 6.63E-04 2.27E-02 7.82E-04 6.27E-04 4.37E-03 RCA-RXB-CONC-012-0.0-B-D-QC 3.71E-06 3.82E-05 2.31E-05 0.00E+00 0.00E+00 4.70E-03 9.42E-04 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 5.32E-04 0.00E+00 2.81E-02 0.00E+00 2.65E-04 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 2.12E-04 0.00E+00 2.96E-02 3.57E-04 8.34E-03 1.61E-03 RCA-RXB-CONC-014-0.5-B-QC 2.15E-04 1.81E-03 4.29E-04 1.62E-02 0.00E+00 8.91E-03 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 1.51E-05 0.00E+00 1.38E-04 7.90E-03 6.35E-04 0.00E+00 1.21E-03 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 7.45E-04 0.00E+00 0.00E+00 0.00E+00 4.31E-03 8.51E-03 RCA-RXB-CONC-020-0.5-B-QC 1.30E-04 9.09E-04 2.25E-04 0.00E+00 0.00E+00 6.27E-04 1.22E-03 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.43E-03 1.87E-04 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 0.00E+00 3.31E-04 1.36E-02 0.00E+00 2.19E-04 0.00E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 8.56E-05 2.33E-05 5.63E-03 0.00E+00 4.58E-03 0.00E+00 RCA-RXB-CONC-024-0.5-B-QC 1.85E-04 0.00E+00 1.36E-03 1.27E-01 1.44E-03 1.15E-02 5.71E-04 RCA-RXB-CONC-025-0.0-B-QC 3.16E-06 3.86E-04 9.09E-05 2.51E-02 1.16E-03 4.76E-03 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 0.00E+00 1.33E-05 7.36E-03 6.45E-04 3.37E-03 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 0.00E+00 9.90E-05 1.53E-04 6.69E-03 1.14E-04 1.09E-03 0.00E+00 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.19E-03 9.29E-04 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 4.56E-07 1.05E-04 2.62E-05 2.32E-02 0.00E+00 1.08E-03 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 7.72E-05 1.08E-04 7.54E-03 0.00E+00 1.15E-03 4.89E-04 RCA-RXB-CONC-030-0.5-B-QC 4.26E-05 0.00E+00 0.00E+00 2.14E-02 3.14E-04 4.60E-04 3.57E-04 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 2.24E-04 0.00E+00 2.82E-04 0.00E+00 2.22E-03 6.33E-05 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 5.09E-05 1.88E-05 2.33E-03 0.00E+00 3.94E-03 1.66E-04 RCA-RXB-CONC-035-0.0-B-QC 4.49E-06 1.87E-03 1.16E-03 1.34E-02 1.10E-03 6.15E-03 9.26E-04 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.55E-04 3.25E-02 1.58E-03 3.56E-04 1.46E-03 RCA-RXB-CONC-036-0.0-B-QC 1.68E-06 2.24E-03 2.30E-03 2.26E-02 2.30E-05 3.63E-02 0.00E+00 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 1.08E-03 3.50E-04 6.45E-02 3.12E-03 8.84E-02 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 9.23E-05 7.52E-04 9.19E-04 3.05E-02 1.27E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.79E-06 2.33E-04 1.03E-05 6.62E-03 0.00E+00 3.12E-03 0.00E+00 RCA-RXB-CONC-041-0.0-B-QC 0.00E+00 3.11E-04 1.99E-04 1.01E-02 0.00E+00 4.49E-03 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.50E-05 1.56E-04 3.47E-05 2.23E-02 0.00E+00 8.10E-03 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 1.27E-05 1.09E-04 1.51E-04 0.00E+00 0.00E+00 6.76E-03 0.00E+00 RCA-RXB-CONC-048-0.0-B-QC 3.36E-06 1.67E-04 3.36E-04 6.99E-03 0.00E+00 5.94E-03 4.71E-04 RCA-RXBT-CONC-001-0.0-B-D-QC 0.00E+00 3.99E-04 1.16E-03 1.15E-01 1.23E-03 5.96E-03 2.60E-03 RCA-RXBT-CONC-002-0.0-B-QC 0.00E+00 2.93E-03 4.68E-03 2.63E-01 5.29E-03 0.00E+00 3.51E-03 RCA-RXBT-CONC-003-0.0-B-QC 2.61E-05 5.79E-04 0.00E+00 0.00E+00 0.00E+00 9.74E-03 0.00E+00 RCA-TURB-CONC-033-0.5-B-I-QC 0.00E+00 1.24E-03 2.77E-03 2.06E-01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 1.34E-04 2.01E-03 2.99E-05 2.00E-01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.5-B-I-QC 6.44E-05 1.28E-03 1.52E-03 7.39E-01 1.70E-04 1.28E-03 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.59E-04 6.78E-04 7.96E-04 0.00E+00 0.00E+00 6.22E-04 2.16E-03 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 6.36E-04 1.63E-04 4.47E-02 0.00E+00 9.21E-03 0.00E+00 RSCS TSD 25-032 Rev 0 Page 79 of 86

Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-TURT-CONC-005-0.0-B-QC 1.13E-04 2.33E-04 1.83E-03 0.00E+00 0.00E+00 1.34E-02 5.59E-03 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 2.59E-03 0.00E+00 1.52E-02 2.25E-03 6.62E-03 2.28E-02 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 5.10E-04 2.00E-03 8.31E-03 6.06E-03 1.92E-02 6.56E-03 RCA-TURT-CONC-007-0.5-B-D-QC 0.00E+00 9.98E-05 4.70E-04 1.06E-01 1.39E-03 0.00E+00 4.22E-03 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 1.33E-03 1.43E-03 2.26E-03 1.62E-03 1.24E-02 3.30E-03 Average (fAi,j,k,avg) 3.41E-05 5.22E-04 5.35E-04 5.03E-02 6.30E-04 6.91E-03 1.93E-03 75 Percentile Fraction (fi,j,k,.75) 1.51E-05 7.28E-04 6.34E-04 3.38E-02 8.17E-04 8.28E-03 1.61E-03 75 Perc. Norm. Frac. (fAi,k,.75) 1.25E-05 6.04E-04 5.26E-04 2.81E-02 6.79E-04 6.88E-03 1.33E-03 RSCS TSD 25-032 Rev 0 Page 80 of 86

Table 5 All Concrete Sample Activity Ratios to Cs-137, First Set of Radionuclides Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-BSTK-CONC-001-0.0-B-QC 2.22E-03 1.75E-02 1.52E-03 7.18E-01 1.00E+00 0.00E+00 RCA-BSTK-CONC-003-0.0-B-D-QC 9.69E-04 0.00E+00 2.17E-04 2.50E+00 1.00E+00 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 1.09E-03 0.00E+00 1.32E-03 6.16E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 1.29E-02 8.42E-05 1.89E-02 1.00E+00 0.00E+00 RCA-NRWT-CONC-002-0.5-B-QC 2.19E-03 0.00E+00 1.46E-03 1.27E-02 1.00E+00 1.78E-03 RCA-NRWT-CONC-003-0.0-B-QC 1.99E-03 8.64E-02 0.00E+00 3.79E-02 1.00E+00 3.54E-05 RCA-NRWT-CONC-005-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 1.50E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 2.27E-03 0.00E+00 0.00E+00 1.06E-01 1.00E+00 2.81E-03 RCA-NRWT-CONC-007-0.0-B-QC 1.89E-05 8.04E-04 3.02E-05 5.16E-01 1.00E+00 0.00E+00 RCA-NRWT-CONC-007-0.5-B-QC 2.09E-04 8.54E-02 0.00E+00 2.07E-03 1.00E+00 2.59E-03 RCA-RXB-CONC-002-0.0-B-QC 6.97E-05 6.42E-05 2.65E-05 8.46E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-003-0.0-B-QC 1.13E-03 0.00E+00 0.00E+00 1.73E-01 1.00E+00 1.37E-03 RCA-RXB-CONC-004-0.0-B-D-QC 1.81E-03 5.05E-03 2.22E-03 3.73E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 2.60E-02 0.00E+00 5.44E-03 1.00E+00 4.03E-04 RCA-RXB-CONC-011-0.0-B-QC 1.28E-04 2.56E-02 1.78E-03 4.25E-03 1.00E+00 2.91E-04 RCA-RXB-CONC-012-0.0-B-D-QC 8.36E-05 2.90E-03 0.00E+00 1.52E-02 1.00E+00 1.44E-03 RCA-RXB-CONC-012-1.0-B-D-QC 1.83E-04 2.50E-02 6.21E-04 2.88E-04 1.00E+00 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 2.97E-04 0.00E+00 0.00E+00 1.25E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-014-0.5-B-QC 4.98E-03 0.00E+00 0.00E+00 9.44E-04 1.00E+00 2.29E-03 RCA-RXB-CONC-019-0.0-B-QC 4.34E-05 0.00E+00 6.59E-04 8.34E-03 1.00E+00 4.21E-04 RCA-RXB-CONC-020-0.0-B-QC 5.96E-03 0.00E+00 0.00E+00 1.82E-02 1.00E+00 2.23E-04 RCA-RXB-CONC-020-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.20E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-023-0.0-B-QC 1.13E-04 5.73E-03 0.00E+00 6.68E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-023-0.5-B-QC 9.45E-05 1.03E-01 0.00E+00 5.09E-03 1.00E+00 8.71E-04 RCA-RXB-CONC-024-0.0-B-QC 7.17E-04 3.66E-03 0.00E+00 3.92E-02 1.00E+00 3.54E-04 RCA-RXB-CONC-024-0.5-B-QC 9.55E-04 4.62E-02 0.00E+00 9.13E-03 1.00E+00 1.54E-04 RCA-RXB-CONC-025-0.0-B-QC 1.00E-03 0.00E+00 1.17E-04 6.70E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 8.01E-04 1.72E-02 3.92E-05 6.64E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 3.02E-04 4.48E-03 0.00E+00 3.10E-01 1.00E+00 1.54E-04 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 2.28E-02 0.00E+00 2.05E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 3.51E-04 1.07E-02 2.07E-04 2.30E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 3.18E-04 0.00E+00 2.20E-04 1.96E-02 1.00E+00 9.40E-05 RCA-RXB-CONC-030-0.5-B-QC 1.59E-04 8.37E-03 0.00E+00 1.33E-03 1.00E+00 0.00E+00 RCA-RXB-CONC-032-0.0-B-QC 5.80E-04 2.23E-03 1.02E-04 1.37E-02 1.00E+00 3.63E-05 RCA-RXB-CONC-034-0.0-B-QC 7.89E-05 1.18E-03 3.93E-05 1.00E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-035-0.0-B-QC 5.52E-03 8.18E-03 3.51E-04 1.77E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-035-0.5-B-QC 2.08E-04 3.07E-02 0.00E+00 1.46E-02 1.00E+00 2.38E-03 RCA-RXB-CONC-036-0.0-B-QC 1.39E-02 3.38E-03 2.63E-03 1.97E-01 1.00E+00 8.20E-04 RCA-RXB-CONC-037-0.0-B-QC 2.72E-03 0.00E+00 0.00E+00 3.68E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 4.26E-03 0.00E+00 0.00E+00 1.55E-01 1.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.72E-04 4.37E-03 0.00E+00 5.89E-03 1.00E+00 3.68E-04 RCA-RXB-CONC-041-0.0-B-QC 4.66E-04 1.71E-03 1.27E-04 2.62E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.29E-03 2.57E-03 1.10E-04 5.49E-02 1.00E+00 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 2.78E-04 2.43E-03 2.06E-05 9.72E-03 1.00E+00 2.20E-04 RCA-RXB-CONC-048-0.0-B-QC 6.78E-04 4.33E-03 1.22E-05 3.97E-02 1.00E+00 0.00E+00 RCA-RXBT-CONC-001-0.0-B-D-QC 4.30E-03 3.21E-01 0.00E+00 1.33E-01 1.00E+00 0.00E+00 RCA-RXBT-CONC-002-0.0-B-QC 3.00E-01 9.92E+00 6.51E-02 3.43E-02 1.00E+00 6.66E-02 RCA-RXBT-CONC-003-0.0-B-QC 0.00E+00 3.35E-01 0.00E+00 6.02E-02 1.00E+00 1.51E-03 RCA-TURB-CONC-033-0.5-B-I-QC 3.41E-02 2.20E+00 0.00E+00 0.00E+00 1.00E+00 3.11E-02 RCA-TURB-CONC-033-1.0-B-I-QC 5.23E-01 0.00E+00 3.26E-01 0.00E+00 1.00E+00 6.49E-02 RCA-TURB-CONC-033-1.5-B-I-QC 1.65E+00 0.00E+00 0.00E+00 0.00E+00 1.00E+00 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 1.78E-03 2.35E-02 5.65E-04 3.85E-02 1.00E+00 5.86E-03 RCA-TURT-CONC-003-0.0-B-QC 3.95E-03 0.00E+00 9.98E-04 3.60E-02 1.00E+00 3.70E-03 RSCS TSD 25-032 Rev 0 Page 81 of 86

Sample ID Am-241 C-14 Cm-243/244 Co-60 Cs-137 Eu-152 RCA-TURT-CONC-005-0.0-B-QC 2.84E-03 0.00E+00 0.00E+00 1.07E-02 1.00E+00 0.00E+00 RCA-TURT-CONC-005-0.5-B-QC 8.03E-03 1.47E+00 4.65E-03 8.15E-03 1.00E+00 1.31E-02 RCA-TURT-CONC-007-0.0-B-D-QC 2.90E-03 2.84E-01 0.00E+00 6.71E-02 1.00E+00 4.00E-03 RCA-TURT-CONC-007-0.5-B-D-QC 3.84E-02 1.09E+00 5.79E-04 1.06E-02 1.00E+00 2.08E-03 RCA-TURT-CONC-009-0.0-B-QC 5.19E-03 1.91E-01 0.00E+00 8.18E-02 1.00E+00 0.00E+00 75 Percentile Ratio (Ri,Cs-137,k,.75) 2.88E-03 2.54E-02 3.18E-04 9.99E-02 1.00E+00 1.43E-03 75 Perc. Norm. Ratio (fRAi,k,.75) 2.03E-03 1.78E-02 2.24E-04 7.02E-02 7.03E-01 1.00E-03 RSCS TSD 25-032 Rev 0 Page 82 of 86

Table 5 All Concrete Sample Activity Ratios to Cs-137, Second Set of Radionuclides Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-BSTK-CONC-001-0.0-B-QC 6.49E-04 7.82E-01 1.09E-02 1.08E-03 0.00E+00 3.72E-01 RCA-BSTK-CONC-003-0.0-B-D-QC 0.00E+00 3.72E+00 4.82E-02 2.71E-03 0.00E+00 3.25E+02 RCA-BSTK-CONC-004-0.0-B-QC 9.15E-04 3.55E-01 0.00E+00 0.00E+00 0.00E+00 1.61E-01 RCA-NRWT-CONC-002-0.0-B-QC 1.31E-04 0.00E+00 3.06E-04 2.44E-05 5.68E-07 1.33E-02 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 5.08E-01 3.14E-02 1.94E-04 3.15E-03 0.00E+00 RCA-NRWT-CONC-003-0.0-B-QC 3.53E-03 1.41E-02 1.67E-02 0.00E+00 0.00E+00 1.00E-01 RCA-NRWT-CONC-005-0.0-B-QC 3.13E-04 2.51E-01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-NRWT-CONC-006-0.0-B-QC 1.20E-03 2.37E-02 6.42E-03 2.56E-05 0.00E+00 6.81E-02 RCA-NRWT-CONC-007-0.0-B-QC 0.00E+00 1.08E-01 0.00E+00 3.51E-04 0.00E+00 3.30E-02 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 2.76E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-002-0.0-B-QC 0.00E+00 4.36E-03 2.07E-03 0.00E+00 0.00E+00 4.38E-03 RCA-RXB-CONC-003-0.0-B-QC 7.27E-04 0.00E+00 0.00E+00 0.00E+00 3.93E-04 2.33E-01 RCA-RXB-CONC-004-0.0-B-D-QC 7.81E-04 0.00E+00 0.00E+00 0.00E+00 2.49E-04 0.00E+00 RCA-RXB-CONC-009-0.0-B-QC 3.19E-04 0.00E+00 0.00E+00 9.80E-06 0.00E+00 3.07E-02 RCA-RXB-CONC-011-0.0-B-QC 1.11E-03 0.00E+00 0.00E+00 5.00E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-012-0.0-B-D-QC 5.69E-04 0.00E+00 0.00E+00 1.72E-05 7.60E-05 3.27E-02 RCA-RXB-CONC-012-1.0-B-D-QC 2.02E-05 1.27E-01 5.01E-03 8.68E-06 3.11E-04 2.81E-02 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 0.00E+00 3.28E-03 4.06E-06 2.70E-06 5.73E-03 RCA-RXB-CONC-014-0.5-B-QC 2.32E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 3.42E-05 5.48E-05 1.87E-02 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.35E-04 0.00E+00 RCA-RXB-CONC-020-0.5-B-QC 1.73E-04 2.46E-02 0.00E+00 2.07E-05 1.67E-04 3.77E-02 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 4.25E-02 1.02E-02 4.48E-06 0.00E+00 1.13E-02 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 1.32E-01 0.00E+00 8.11E-05 0.00E+00 5.56E-02 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 0.00E+00 1.66E-03 9.36E-06 3.85E-05 1.06E-02 RCA-RXB-CONC-024-0.5-B-QC 0.00E+00 0.00E+00 1.12E-01 2.08E-06 2.24E-04 5.09E-02 RCA-RXB-CONC-025-0.0-B-QC 8.30E-05 0.00E+00 0.00E+00 2.63E-06 0.00E+00 3.10E-02 RCA-RXB-CONC-026-0.0-B-D-QC 2.40E-04 4.86E-02 1.72E-02 3.51E-05 3.35E-04 3.18E-02 RCA-RXB-CONC-027-0.0-B-QC 2.80E-04 7.86E-02 1.55E-02 2.76E-05 0.00E+00 8.61E-02 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 1.22E-01 2.48E-02 5.16E-05 3.00E-04 3.49E-02 RCA-RXB-CONC-029-0.0-B-QC 6.66E-04 5.33E-02 7.62E-03 3.99E-05 0.00E+00 5.18E-02 RCA-RXB-CONC-030-0.0-B-QC 7.37E-05 1.34E-02 0.00E+00 1.37E-05 5.02E-05 1.62E-02 RCA-RXB-CONC-030-0.5-B-QC 2.15E-04 1.40E-02 0.00E+00 0.00E+00 4.88E-05 8.33E-02 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 3.16E-03 2.03E-04 0.00E+00 5.23E-05 1.88E-03 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 1.97E-03 1.52E-03 0.00E+00 1.65E-05 2.46E-03 RCA-RXB-CONC-035-0.0-B-QC 0.00E+00 2.71E-02 0.00E+00 6.05E-05 2.97E-04 2.71E-02 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.28E-03 0.00E+00 8.80E-05 1.07E-01 RCA-RXB-CONC-036-0.0-B-QC 2.90E-04 8.79E-02 4.16E-03 1.37E-05 6.20E-04 7.19E-02 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 0.00E+00 1.89E-01 2.61E-04 0.00E+00 2.33E-01 RCA-RXB-CONC-038-0.0-B-QC 2.53E-04 0.00E+00 1.98E-02 1.05E-05 0.00E+00 3.06E-02 RCA-RXB-CONC-040-0.0-B-QC 3.92E-05 0.00E+00 4.64E-03 0.00E+00 9.97E-05 7.21E-03 RCA-RXB-CONC-041-0.0-B-QC 1.66E-05 7.58E-02 4.42E-02 0.00E+00 2.44E-04 4.24E-02 RCA-RXB-CONC-043-0.0-B-QC 0.00E+00 0.00E+00 2.56E-03 3.47E-05 2.25E-04 1.06E-02 RCA-RXB-CONC-046-0.0-B-QC 0.00E+00 2.78E-03 0.00E+00 3.22E-06 0.00E+00 1.09E-02 RCA-RXB-CONC-048-0.0-B-QC 0.00E+00 5.50E-03 8.02E-03 2.34E-05 0.00E+00 1.14E-02 RCA-RXBT-CONC-001-0.0-B-D-QC 3.03E-03 1.26E-01 0.00E+00 1.35E-04 4.32E-04 2.12E-01 RCA-RXBT-CONC-002-0.0-B-QC 3.84E-01 0.00E+00 3.96E+00 0.00E+00 6.79E-02 0.00E+00 RCA-RXBT-CONC-003-0.0-B-QC 6.21E-03 0.00E+00 4.52E-02 1.01E-04 1.07E-03 2.54E-01 RCA-TURB-CONC-033-0.5-B-I-QC 2.44E-02 1.58E+00 1.95E+01 6.34E-04 6.26E-03 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 0.00E+00 0.00E+00 1.29E+02 0.00E+00 8.91E-02 8.53E+01 RCA-TURB-CONC-033-1.5-B-I-QC 1.73E-01 2.61E+01 1.98E+01 1.36E-02 1.26E-01 4.12E+01 RCA-TURT-CONC-001-0.0-B-QC 0.00E+00 7.07E-01 0.00E+00 9.31E-06 0.00E+00 1.18E-01 RCA-TURT-CONC-003-0.0-B-QC 3.08E-03 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.58E-01 RSCS TSD 25-032 Rev 0 Page 83 of 86

Sample ID Eu-154 Fe-55 H-3 Mn-54 Nb-94 Ni-63 RCA-TURT-CONC-005-0.0-B-QC 2.31E-03 0.00E+00 0.00E+00 1.33E-04 0.00E+00 1.45E-02 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 7.52E-02 1.59E-01 0.00E+00 0.00E+00 1.27E+00 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 0.00E+00 1.36E-01 6.98E-04 1.47E-03 4.48E-01 RCA-TURT-CONC-007-0.5-B-D-QC 7.00E-03 1.07E+00 0.00E+00 2.59E-04 0.00E+00 1.52E+00 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 5.79E-04 2.21E-01 75 Percentile Ratio (Ri,Cs-137,k,.75) 6.61E-04 8.55E-02 1.70E-02 5.12E-05 2.99E-04 1.15E-01 75 Perc. Norm. Ratio (fRAi,k,.75) 4.65E-04 6.01E-02 1.20E-02 3.60E-05 2.10E-04 8.08E-02 RSCS TSD 25-032 Rev 0 Page 84 of 86

Table 5 All Concrete Sample Activity Ratios to Cs-137, Third Set of Radionuclides Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-BSTK-CONC-001-0.0-B-QC 0.00E+00 1.02E-03 7.35E-04 0.00E+00 1.08E-04 1.20E-02 9.04E-03 RCA-BSTK-CONC-003-0.0-B-D-QC 3.10E-04 5.09E-04 2.66E-04 0.00E+00 0.00E+00 1.29E-02 0.00E+00 RCA-BSTK-CONC-004-0.0-B-QC 1.98E-04 2.16E-03 0.00E+00 1.09E-01 0.00E+00 4.20E-02 2.83E-02 RCA-NRWT-CONC-002-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 6.86E-05 1.66E-02 2.13E-04 RCA-NRWT-CONC-002-0.5-B-QC 0.00E+00 1.39E-03 3.28E-03 1.40E-01 0.00E+00 0.00E+00 2.01E-02 RCA-NRWT-CONC-003-0.0-B-QC 0.00E+00 0.00E+00 1.99E-03 3.79E-01 5.51E-04 2.76E-02 4.06E-04 RCA-NRWT-CONC-005-0.0-B-QC 8.05E-04 8.56E-04 7.00E-04 0.00E+00 9.02E-04 1.29E-02 8.69E-03 RCA-NRWT-CONC-006-0.0-B-QC 7.49E-06 3.22E-05 2.30E-04 8.49E-02 0.00E+00 2.85E-03 0.00E+00 RCA-NRWT-CONC-007-0.0-B-QC 3.12E-06 0.00E+00 1.91E-05 7.72E-04 0.00E+00 1.84E-03 9.80E-04 RCA-NRWT-CONC-007-0.5-B-QC 0.00E+00 0.00E+00 0.00E+00 3.97E-02 2.28E-03 2.49E-02 1.58E-03 RCA-RXB-CONC-002-0.0-B-QC 2.30E-06 1.36E-05 2.78E-05 1.60E-03 2.79E-04 5.86E-03 6.71E-06 RCA-RXB-CONC-003-0.0-B-QC 5.98E-06 6.82E-04 7.82E-04 1.61E-02 1.19E-03 3.38E-03 2.29E-03 RCA-RXB-CONC-004-0.0-B-D-QC 6.78E-05 4.40E-04 0.00E+00 2.57E-01 1.62E-03 7.92E-04 1.69E-03 RCA-RXB-CONC-009-0.0-B-QC 0.00E+00 3.96E-05 3.84E-04 0.00E+00 7.61E-04 3.17E-04 0.00E+00 RCA-RXB-CONC-011-0.0-B-QC 3.94E-05 0.00E+00 7.06E-04 2.41E-02 8.32E-04 6.67E-04 4.65E-03 RCA-RXB-CONC-012-0.0-B-D-QC 3.93E-06 4.05E-05 2.44E-05 0.00E+00 0.00E+00 4.98E-03 9.97E-04 RCA-RXB-CONC-012-1.0-B-D-QC 0.00E+00 6.50E-04 0.00E+00 3.44E-02 0.00E+00 3.24E-04 0.00E+00 RCA-RXB-CONC-014-0.0-B-QC 0.00E+00 2.25E-04 0.00E+00 3.15E-02 3.80E-04 8.88E-03 1.72E-03 RCA-RXB-CONC-014-0.5-B-QC 2.23E-04 1.88E-03 4.45E-04 1.68E-02 0.00E+00 9.24E-03 0.00E+00 RCA-RXB-CONC-019-0.0-B-QC 1.57E-05 0.00E+00 1.43E-04 8.21E-03 6.59E-04 0.00E+00 1.26E-03 RCA-RXB-CONC-020-0.0-B-QC 0.00E+00 7.74E-04 0.00E+00 0.00E+00 0.00E+00 4.47E-03 8.84E-03 RCA-RXB-CONC-020-0.5-B-QC 1.39E-04 9.72E-04 2.41E-04 0.00E+00 0.00E+00 6.70E-04 1.31E-03 RCA-RXB-CONC-023-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.77E-03 2.14E-04 RCA-RXB-CONC-023-0.5-B-QC 0.00E+00 0.00E+00 4.35E-04 1.78E-02 0.00E+00 2.88E-04 0.00E+00 RCA-RXB-CONC-024-0.0-B-QC 0.00E+00 9.13E-05 2.48E-05 6.01E-03 0.00E+00 4.89E-03 0.00E+00 RCA-RXB-CONC-024-0.5-B-QC 2.63E-04 0.00E+00 1.93E-03 1.80E-01 2.04E-03 1.64E-02 8.12E-04 RCA-RXB-CONC-025-0.0-B-QC 3.59E-06 4.39E-04 1.03E-04 2.85E-02 1.32E-03 5.40E-03 0.00E+00 RCA-RXB-CONC-026-0.0-B-D-QC 0.00E+00 0.00E+00 1.59E-05 8.80E-03 7.72E-04 4.03E-03 0.00E+00 RCA-RXB-CONC-027-0.0-B-QC 0.00E+00 1.49E-04 2.31E-04 1.01E-02 1.72E-04 1.64E-03 0.00E+00 RCA-RXB-CONC-028-0.0-B-QC 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.68E-03 1.31E-03 0.00E+00 RCA-RXB-CONC-029-0.0-B-QC 6.34E-07 1.46E-04 3.64E-05 3.23E-02 0.00E+00 1.49E-03 0.00E+00 RCA-RXB-CONC-030-0.0-B-QC 0.00E+00 8.18E-05 1.14E-04 7.99E-03 0.00E+00 1.22E-03 5.18E-04 RCA-RXB-CONC-030-0.5-B-QC 4.82E-05 0.00E+00 0.00E+00 2.42E-02 3.56E-04 5.21E-04 4.05E-04 RCA-RXB-CONC-032-0.0-B-QC 0.00E+00 2.29E-04 0.00E+00 2.89E-04 0.00E+00 2.28E-03 6.49E-05 RCA-RXB-CONC-034-0.0-B-QC 0.00E+00 5.21E-05 1.93E-05 2.39E-03 0.00E+00 4.04E-03 1.70E-04 RCA-RXB-CONC-035-0.0-B-QC 5.74E-06 2.39E-03 1.48E-03 1.72E-02 1.40E-03 7.86E-03 1.18E-03 RCA-RXB-CONC-035-0.5-B-QC 0.00E+00 0.00E+00 1.86E-04 3.90E-02 1.90E-03 4.28E-04 1.75E-03 RCA-RXB-CONC-036-0.0-B-QC 2.48E-06 3.30E-03 3.40E-03 3.34E-02 3.39E-05 5.36E-02 0.00E+00 RCA-RXB-CONC-037-0.0-B-QC 0.00E+00 2.30E-03 7.44E-04 1.37E-01 6.63E-03 1.88E-01 0.00E+00 RCA-RXB-CONC-038-0.0-B-QC 1.15E-04 9.41E-04 1.15E-03 3.81E-02 1.58E-05 0.00E+00 0.00E+00 RCA-RXB-CONC-040-0.0-B-QC 1.85E-06 2.40E-04 1.07E-05 6.84E-03 0.00E+00 3.22E-03 0.00E+00 RCA-RXB-CONC-041-0.0-B-QC 0.00E+00 3.76E-04 2.41E-04 1.22E-02 0.00E+00 5.43E-03 0.00E+00 RCA-RXB-CONC-043-0.0-B-QC 1.66E-05 1.73E-04 3.84E-05 2.47E-02 0.00E+00 8.96E-03 0.00E+00 RCA-RXB-CONC-046-0.0-B-QC 1.31E-05 1.13E-04 1.56E-04 0.00E+00 0.00E+00 6.99E-03 0.00E+00 RCA-RXB-CONC-048-0.0-B-QC 3.65E-06 1.82E-04 3.65E-04 7.59E-03 0.00E+00 6.45E-03 5.11E-04 RCA-RXBT-CONC-001-0.0-B-D-QC 0.00E+00 8.22E-04 2.39E-03 2.37E-01 2.53E-03 1.23E-02 5.35E-03 RCA-RXBT-CONC-002-0.0-B-QC 0.00E+00 6.42E-02 1.03E-01 5.77E+00 1.16E-01 0.00E+00 7.70E-02 RCA-RXBT-CONC-003-0.0-B-QC 4.49E-05 9.97E-04 0.00E+00 0.00E+00 0.00E+00 1.68E-02 0.00E+00 RCA-TURB-CONC-033-0.5-B-I-QC 0.00E+00 3.82E-02 8.54E-02 6.36E+00 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.0-B-I-QC 3.64E-02 5.47E-01 8.12E-03 5.44E+01 0.00E+00 0.00E+00 0.00E+00 RCA-TURB-CONC-033-1.5-B-I-QC 2.26E-02 4.50E-01 5.34E-01 2.59E+02 5.96E-02 4.50E-01 0.00E+00 RCA-TURT-CONC-001-0.0-B-QC 3.02E-04 1.29E-03 1.52E-03 0.00E+00 0.00E+00 1.18E-03 4.11E-03 RCA-TURT-CONC-003-0.0-B-QC 0.00E+00 8.78E-04 2.24E-04 6.17E-02 0.00E+00 1.27E-02 0.00E+00 RSCS TSD 25-032 Rev 0 Page 85 of 86

Sample ID Np-237 Pu-238 Pu-239/240 Pu-241 Sb-125 Sr-90 Tc-99 RCA-TURT-CONC-005-0.0-B-QC 1.19E-04 2.45E-04 1.93E-03 0.00E+00 0.00E+00 1.41E-02 5.89E-03 RCA-TURT-CONC-005-0.5-B-QC 0.00E+00 1.09E-02 0.00E+00 6.40E-02 9.50E-03 2.79E-02 9.63E-02 RCA-TURT-CONC-007-0.0-B-D-QC 0.00E+00 1.04E-03 4.07E-03 1.69E-02 1.23E-02 3.90E-02 1.33E-02 RCA-TURT-CONC-007-0.5-B-D-QC 0.00E+00 5.32E-04 2.51E-03 5.63E-01 7.39E-03 0.00E+00 2.25E-02 RCA-TURT-CONC-009-0.0-B-QC 0.00E+00 2.04E-03 2.20E-03 3.46E-03 2.49E-03 1.91E-02 5.06E-03 75 Percentile Ratio (Ri,Cs-137,k,.75) 3.37E-05 1.02E-03 1.40E-03 5.62E-02 1.28E-03 1.28E-02 2.15E-03 75 Perc. Norm. Ratio (fRAi,k,.75) 2.37E-05 7.13E-04 9.81E-04 3.95E-02 9.02E-04 9.03E-03 1.51E-03 5.3 Derived Concentration Guideline Levels (DCGLs)

Derived Concentration Guideline Levels (DCGLs) were developed for concrete, soil, buried piping, and embedded piping, as shown in Table 5-10. These DCGLs were developed using an industrial exposure scenario where residual radioactivity left at each radionuclides respective DCGL results in 25 mrem/year to an average member of the critical group. Additional information on the development and basis of these DCGLs is provided in the OCS LTP. When two radionuclides are reported per laboratory analysis (e.g., Cm-243/244 or Pu-239/240) the most limiting of the separate DCGLs is listed for the pair and used in the RDF calculations described in Section 2.4.2.

Table 5 Derived Concentration Guideline Levels Used for RDF Calculations Radionuclide Concrete DCGL (pCi/m2)

Soil DCGL (pCi/g)

Buried Pipe DCGL (pCi/m2)

Embedded Pipe DCGL (pCi/m2)

Am-241 1.424E+09 7.300E+02 6.000E+10 2.020E+11 C-14 6.222E+08 2.070E+03 1.720E+09 3.590E+09 Cm-243/244 3.694E+08 1.810E+02 2.270E+11 4.180E+11 Cm-243 3.694E+08 1.810E+02 6.170E+11 1.010E+12 Cm-244 3.626E+09 1.820E+03 2.270E+11 4.180E+11 Co-60 1.623E+07 7.940E+00 7.070E+12 7.940E+13 Cs-137 7.314E+07 3.580E+01 4.930E+11 4.430E+12 Eu-152 3.597E+07 1.760E+01 1.490E+13 1.320E+14 Eu-154 3.331E+07 1.630E+01 1.230E+13 1.290E+14 Fe-55 1.645E+13 8.390E+06 6.910E+15 9.220E+16 H-3 1.050E+11 5.020E+04 8.060E+15 6.890E+15 Mn-54 6.969E+07 3.410E+01 1.620E+14 2.420E+15 Nb-94 2.484E+07 1.250E+01 4.970E+13 1.450E+14 Ni-63 1.540E+13 7.750E+06 6.170E+14 1.830E+15 Np-237 1.147E+08 5.750E+01 1.240E+10 2.390E+10 Pu-238 2.085E+08 1.140E+03 5.830E+08 2.910E+09 Pu-239/240 1.523E+08 2.920E+02 4.330E+08 1.130E+09 Pu-239 1.541E+08 3.060E+02 4.330E+08 1.130E+09 Pu-240 1.523E+08 2.920E+02 4.360E+08 1.140E+09 Pu-241 9.450E+09 2.500E+04 5.680E+10 4.430E+13 Sb-125 1.136E+08 5.560E+01 4.010E+11 5.170E+13 Sr-90 8.619E+09 4.240E+03 1.150E+12 4.640E+12 Tc-99 2.817E+10 1.370E+04 1.250E+13 1.030E+13 RSCS TSD 25-032 Rev 0 Page 86 of 86