ML25345A117

Calculation ENG-OCS-012, Rev. 0, Basement Fill Model: Probabilistic Analysis for Instantaneous Release Scenario Assuming Industrial Use Exposure Pathways

ML25345A117
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Site:	Oyster Creek
Issue date:	12/11/2025
From:	BHI Energy, Holtec Decommissioning International
To:	Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
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HDI 25-039 ENG-OCS-012, Rev 0
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ENGINEERING CALCULATION Basement Fill Model:

Probabilistic Analysis for Instantaneous Release Scenario Assuming Industrial Use Exposure Pathways Oyster Creek Station ENG-OCS-012 Revision: 0 November 1, 2023 Prepared by:

BHI Energy 97 Libbey Industrial Pkwy Weymouth, MA Prepared by Approved by

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 1 of 38 1.0 PURPOSE This calculation identifies sensitive input parameters (i.e., those input parameters that produce a significant change in the calculated dose with changes in their value) in the modeling of the Instantaneous Release (IR) scenario as part of the development of Basement Fill Model (BFM) derived concentration guideline levels (DCGL) for below-grade concrete structures. The probabilistic analyses were performed using the RESRAD-Onsite code (version 7.2) with the exposure pathways assumed for the Industrial Use (IU) compliance scenario.

Identification of sensitive input parameters is a necessary process to account for uncertainty in input values.

The uncertainty associated with sensitive input parameters is addressed in subsequent DCGL calculations by determining and assigning reasonably conservative input values based on the results of RESRAD-Onsite probabilistic analyses. Thus, the results of this calculation support the subsequent development of DCGL values for assessing residual radioactive contamination associated with below-grade concrete structures targeted to remain onsite at license termination.

2.0 APPLICABILITY This calculation addresses only the sensitivity analysis for input parameters for the BFM Instantaneous Release scenario with the IU exposure pathways.

3.0 REFERENCES

3.1 ENG-AP-02, Verification of Software Operability 3.2 ANL/EAD-4, Users Manual for RESRAD Version 6, U.S. Department of Energy -

Argonne National Laboratory, July 2001 3.3 ANL/EVS/TM-18/1, RESRAD-Onsite 7.2 Users Guide, April 2018 3.4 NUREG/CR-7267, Default Parameter Values and Distribution in RESRAD-ONSITE V7.2, RESRAD-BUILD V3.5, and RESRAD-OFFSITE V4.0 Computer Codes, February 2020 3.5 NUREG/CR-5512, Volume 3,

Residual Radioactive Contamination from Decommissioning: Parameter Analysis, Draft Report for Comment, October 1999 3.6 NUREG/CR-6697, Development of Probabilistic RESRAD 6.0 and RESRAD-BUILD 3.0 Computer Codes, Nov. 2000 3.7 Radionuclide Selection for DCGL Development-Oyster Creek Station Site Characterization Project, January 2022 3.8 Oyster Creek Station Historical Site Assessment, Rev. 2, November 2021 3.9 Hydrogeologic Investigation Report, GHD, January 2017 3.10 Health Physics, Vol. 39, Regional and Site-Specific Absolute Humidity Data for Use in Tritium Dose Calculations, 1980 3.11 ENG-OCS-007, RESRAD-Onsite Probabilistic Analysis - Industrial Use Scenario, Rev0 1.0 METHOD OF CALCULATION The operability of the RESRAD-Onsite 7.2 computer code was verified on each computer used for code executions in accordance with BHI Energy Engineering procedure ENG-AP-02, Verification of Software Operability [3.1]. The RESRAD code has undergone extensive review, benchmarking, verification, and validation [3.2]. The RESRAD-Onsite 7.2 Users Guide [3.3] was used as a reference for code use.

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 2 of 38 The RESidual RADioactivity (RESRAD) model and computer code was developed at Argonne National Laboratory as a multifunctional tool to assist in developing radiological criteria for assessing the dose associated with residual radioactive material. The RESRAD-Onsite computer code is a pathway analysis model designed to evaluate the potential radiological dose associated with residual radioactive material.

RESRAD-Onsite input parameters allow site-specific modeling through entry of site data, such as contaminated zone area and depth, site soil hydrogeologic characteristics, and site soil strata information.

Additionally, the user can evaluate radiation exposure under different exposure scenarios by selecting scenario-specific exposure pathways.

The RESRAD-Onsite code includes probabilistic modules that permit the user to perform a sensitivity analysis to identify parameters that have the greatest impact on dose. The probabilistic modules allow the evaluation of dose as a function of parameter distributions.

The approach taken in this calculation consists of two primary phases: the selection of input parameter values and performing RESRAD-Onsite code executions.

Input parameters were treated as either deterministic (a single value is assigned) or stochastic (a parameter distribution is assigned). Treatment depended on parameter type, availability of site-specific data, and the relevance of the parameter in the dose calculations. Behavioral and metabolic parameters were treated as deterministic and were assigned values from NUREG/CR-5512 [3.5], NUREG/CR-7267 [3.4], or the RESRAD User Manual. Physical parameters for which site-specific data are unavailable were assigned parameter distributions from NUREG/CR-7267 or assigned a deterministic value from either NUREG/CR-5512 or the RESRAD Users Manual.

The RESRAD-Onsite Probabilistic Output Report provides regression and correlation coefficients for the average doses at the user defined evaluation times. The Partial Rank Correlation Coefficient (PRCC) has been used to identify sensitive parameters. NUREG/CR-7267 and NUREG/CR-6697 [3.6] recommend the use of the PRCC for cases where a non-linear relationship exists, such as in the case for the Industrial Use Scenario. PRCC values greater than zero (positive value) or less than zero (negative value) identify whether sensitive parameters are positively or negatively correlated to dose, respectively.

The criterion for sensitivity used in this calculation was a PRCC value with an absolute value greater than 0.25. To address the uncertainties associated with the input parameters identified as sensitive, the 25th percentile value of the parameters distribution was selected for sensitive parameters that had a negative PRCC value, and the 75th percentile value of the parameters distribution was selected for sensitive parameters that had a positive PRCC value. The 75th percentile and 25th percentile values are recommended as reasonably conservative input values for calculations of DCGL values for open land areas at the OCS site. The approach of assigning 25th and 75th percentile values of a sensitive parameters distribution to account for uncertainty in DCGL values has been accepted in past decommissioning projects (e.g., Yankee Rowe, Zion, Connecticut Yankee, Humboldt Bay, Fort Calhoun Station, and SMUD) by the U.S. Nuclear Regulatory Commission (NRC) and State regulators.

2.0 INPUT and CALCULATIONS 2.1 Radionuclide-of-concern (ROC) 2.1.1 A site-specific suite of potential ROCs has been identified for the OCS site [3.7].

OCS ROCs are listed in Table 1.

NOTE: RESRAD-Onsite 7.2 automatically accounts for progeny radionuclides with input for several of the OCS ROCs. Progeny radionuclides are also listed in Table 1.

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 3 of 38 Table 1: Potential Radionuclides-of-Concern Identified for the OCS Site ROCa Progenyb ROCa Progenyb Am-241 Np-237, Th-229, U-233 Nb-94 C-14 Ni-63 Cm-243 Ac-227, Am-243, Pa-231, Pu-239, U-235 Np-237 Th-229, U-233 Cm-244 Pu-240, Ra-228, Th-228, Th-232, U-236 Pu-238 Pb-210, Po-210, Ra-226, Th-230, U-234 Cs-137 Pu-239 Ac-227, Pa-231, U-235 Co-60 Pu-240 Ra-228, Th-228, Th-232, U-236 Eu-152 Gd-152 Pu-241 Am-241, Np-237, Th-229, U-233 Eu-154 Sb-125 Te-125m Fe-55 Sr-90 H-3 Tc-99 Mn-54 a ROC = radionuclide-of-concern identified for the OCS site.

b Included automatically with input of parent ROC.

2.2 The scenario modelled in this calculation is an IR scenario, which is one of two scenarios that support development of DCGL values for below-grade concrete structures. The IR scenario assumes an instantaneous release of radioactive contamination on the surfaces of below-grade concrete basements to the fill material that is within 1m of the concrete surfaces creating a contaminated volume (CV). The resultant CV remains below site grade, covered by 3ft (0.91m) soil, and extends to a depth of 43ft (13.1m), which is the depth of the Reactor Building foundation walls. Portions of the CV reside in both the unsaturated and saturated zones based on site geological features. The water table is assumed at the site average groundwater table depth and the below-grade concrete structures are assumed not to impede groundwater flow. The configuration of contaminated zone (CZ) created by the CV is shown in Figure 1.

2.3 The CV is assessed using the IU exposure pathways. The IU scenario assumes the average member of the critical group is a hypothetical full-time site worker assigned to outdoor tasks and who also catches and consumes fish from the intake/discharge canal during off-hours. The pathways used to estimate human radiation exposure resulting from residual radioactivity in the soil for this scenario are:

Direct external radiation exposure pathway Inhalation exposure pathway Ingestion exposure via aquatic food from the intake/discharge canal Inadvertent ingestion of contaminated soil

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 4 of 38 Figure 1: Conceptual Configuration of CV (note: not to scale) 2.4 The CV was calculated using the surface areas of below-grade concrete surfaces for the Reactor Building (RB), Turbine Building (TB), Old Radwaste Building (ORB), and stack area provided in Table 1 of Holtec-00045 Calc-001. The surface areas (m2) are multiplied by 1 m to obtain the total volume of fill material immediately adjacent at 1m to the concrete surfaces: CV, m3 = (surface area, m2) x (1m adjacent fill). Table 1 shows these calculations.

Table 1. Contaminated Volume Calculations Below-Grade Instant Release Surface Area*

CV ft2 m2 m3 Reactor Building 78,655 7,307 7,307 Turbine Building 96,535 8,968 8,968 Old RW Building 14,224 1,321 1,321 Stack Area 27,862 2,588 2,588 Total Volume 217,276 20,184 20,184

• Source: Holtec-00045 Calc-001, Table 1 3ft (0.91m)

UZ: 11.5ft (3.5m) 26.74% in UZ SZ: 31.5ft (9.6m)

<------------- well intake depth ----------->

73.26% in SZ

= CV

<------CZ thickness = RB wall height 43 ft (13.11m) -------->

GW flow----->

<---- CZ width 145.3 ft (44.3m = LPAF)-- >

well site grade cover GW table @14.5ft (4.42m)

I I

I

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 5 of 38 2.5 The CZ and length parallel to aquifer flow (LPAF, a RESRAD-Onsite input parameter) are calculated from the CV, assuming a disk configuration with a thickness equal to the height of RB wall, 43 ft (13.11m) (source of RB wall height: Holtec-00045 Calc-001).

CZ Area (m2) = CV (m3)/CVh (m) = r2 20,184 m3/13.11 m = r2 1539.59 m2 = r2 = CZ area 490.07 m2 = r2 22.14m = r 2r = diameter = 44.27m = LPAF The CZ area and LPAF values were rounded to 1539.6 m2 and 44.3m, respectively, for RESRAD-Onsite input.

2.6 Fractions of CV in the unsaturated zone (UZ) and saturated zone (SZ):

Cover thickness = 3 ft (0.91 m)

Height of RB wall left in place under cover = 43 ft (Holtec-00045 Calc-001)

The average ground water (GW) depth for wells near the RB, TB, and ORB is 14.5ft based on Oyster Creek supplied groundwater information. The Excel spreadsheet used for the depth of groundwater is provided as Attachment 1.

Depth to GW = 14.5 ft, which leaves (14.5 ft - 3 ft cover =) 11.5 ft of RB wall above GW.

Fraction of CV in UZ = 11.5 ft/43ft = 0.2674 Fraction of CV in SZ (i.e., GW) = (43-11.5) ft/43 ft = 0.7326 2.7 UZ thickness:

The contaminated zone is located under 3-ft (0.91m) cover and GW is assumed at 14.5 ft, which places top 11.5 ft of CZ in the UZ. Therefore, the thickness of UZ = 11.5 ft (3.5 m).

2.8 Sand is assumed as soil type for cover and fill material (consistent with soil type assumed in calculations for surface soil DCGL values and supported by information provided in the 2017 Hydrogeologic Investigation Report, the OCS HSA, and well installation logs).

Distributions for Kd values, density, porosity, field capacity, and RESRAD b parameter for sand are taken from NURREG/CR-7267 and are applied in the probabilistic analyses.

2.9 Table 2 summarizes the input values/distribution and the reference source for each input parameter. Table 2 also indicates RESRAD-Onsite parameter values that have been calculated previously and are documented in calculation ENG-OCS-007 [3.11].

3.0 RESULTS 3.1 RESRAD-Onsite 7.2 was executed for each ROC using the input values provided in Table

2. An absolute PRCC value 0.25 was used as the criterion for identifying sensitive input parameters.

3.2 Table 3 summarizes the sensitive parameters for each ROC. Selected pages from the RESRAD-Onsite 7.2 Uncertainty Reports from each code execution are provided in. RESRAD-Onsite parameters identified as sensitive are highlighted in yellow.

3.3 Table 4 summarizes the 25th and 75th percentile values for each identified sensitive input parameter for each ROC.

Note: For the sensitive parameters, the 75th percentile value of the distribution was selected when the absolute value of the PRCC was 0.25 and the PRCC had a positive value. The

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 6 of 38 25th percentile value was selected when the absolute value of the PRCC value was 0.25 but had a negative value.

4.0 CONCLUSION

S 4.1 Sensitive input parameters varied among the ROCs and included parameters such as Distribution coefficients (Kd values) in the CZ Kd values in the UZ

• Density of cover material Hydraulic gradient in SZ External shielding factor

• Fish transfer factor

• Depth of soil mixing layer

• Aquatic food fraction Evapotranspiration coefficient 4.2 The 25th and 75th percentile values for sensitive input parameters (presented in Table 4) provide reasonably conservative input for developing DCGL values based on the Instantaneous Release scenario with the application of industrial use exposure pathways.

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 7 of 38 Table 2. Input Values for RESRAD-Onsite Parameters Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario RESRAD Exposure Pathways External Gamma Open Inhalation Open Plant Ingestion Close Meat Ingestion Close Milk Ingestion Close Aquatic Foods Open Drinking Water Close Soil Ingestion Open Radon Close Parameter (unit)

Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/

Mean 1

2 3

4 Soil Concentrations Basic radiation dose limit (mrem/y)

P 3

D 25 10 CFR 20.1402 NR NR NR NR Initial principal radionuclide (pCi/g)

P 2

D 1

Unit Value NR NR NR NR Distribution coefficients (sand soil type assigned to contaminated, unsaturated. and saturated zones) (cm3/g)

Ac-227 P

1 S

Truncated lognormal-n NUREG/CR-7267 7.44 1.1 0.001 0.999 1700 Am-241 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.91 1.95 0.001 0.999 1000 Am-243 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.91 1.95 0.001 0.999 1000 C-14 P

1 S

Truncated lognormal-n NUREG/CR-7267 3.04 1.82 0.001 0.999 21 Cm-243 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 8.13 2.64 0.001 0.999 3400 Cm-244 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 8.13 2.64 0.001 0.999 3400 Co-60 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.56 2.89 0.001 0.999 260 Cs-137 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.27 1.79 0.001 0.999 530 Eu-152 P

1 S

Truncated lognormal-n NUREG/CR-7267 6.86 4.01 0.001 0.999 955 Eu-154 P

1 S

Truncated lognormal-n NUREG/CR-7267 6.86 4.01 0.001 0.999 955 Fe-55 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.77 0

0.001 0.999 320 Gd-152 P

1 S

Truncated lognormal-n NUREG/CR-7267 1.61 3.22 0.001 0.999 5

H-3 P

1 S

Truncated lognormal-n NUREG/CR-7267

-2.81 0.5 0.001 0.999 0.06 Mn-54 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.89 2.64 0.001 0.999 980 Nb-94 P

1 S

Truncated lognormal-n NUREG/CR-7267 7.31 1.39 0.001 0.999 1500 Ni-63 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.87 2.3 0.001 0.999 130 Np-237 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 2.64 1.39 0.001 0.999 14 Pa-231 P

1 S

Truncated lognormal-n NUREG/CR-7267 7.6 1.1 0.001 0.999 2000 Pb-210 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.39 1.39 0.001 0.999 220 Po-210 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.61 1.79 0.001 0.999 100 Pu-238 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.99 1.39 0.001 0.999 400 Pu-239 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.99 1.39 0.001 0.999 400 Pu-240 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.99 1.39 0.001 0.999 400 Pu-241 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 5.99 1.39 0.001 0.999 400 Ra-226 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 8.04 2.08 0.001 0.999 3100 Ra-228 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 8.04 2.08 0.001 0.999 3100 Sb-125 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 2.83 1.79 0.001 0.999 17

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 8 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Sr-90 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 3.09 1.79 0.001 0.999 22 Tc-99 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4

-3.22 1.1 0.001 0.999 0.04 Te-125m P

1 S

Truncated lognormal-n NUREG/CR-7267 6.31 3.22 0.001 0.999 550 Th-228 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.55 2.4 0.001 0.999 700 Th-229 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.55 2.4 0.001 0.999 700 Th-230 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.55 2.4 0.001 0.999 700 Th-232 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 6.55 2.4 0.001 0.999 700 U-233 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.7 2.48 0.001 0.999 110 U-234 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.7 2.48 0.001 0.999 110 U-235 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.7 2.48 0.001 0.999 110 U-236 P

1 S

Truncated lognormal-n ANL/EVS/TM-14/4 4.7 2.48 0.001 0.999 110 Initial concentration of radionuclides present in groundwater (pCi/l)

P 3

D 0

Ground water uncontaminated NR NR NR NR Calculation Times Time since placement of material (y)

P 3

D 0

NR NR NR NR Time for calculations (y)

P 3

D 0, 1, 3, 10, 30, 100, 300, 1000 RESRAD Default NR NR NR NR Contaminated Zone Area of contaminated zone (m2)

P 2

D 1539.6 Based on contaminated volume and height of RB wall.

NR NR NR NR Thickness of contaminated zone (m)

P 2

D 13.1 CZ thickness set to RB wall height.

NR NR NR NR Length parallel to aquifer flow (m)

P 2

D 44.3 Set to diameter of CZ.

NR NR NR NR Does the initial contamination penetrate the water table?

Yes Based on site features and RB dimensions.

Contaminated fraction below water table D

.7326 Based on OCGS site data; average groundwater depths recorded for wells around the RB, TB, and ORB.

NR NR NR NR Cover and Contaminated Zone Hydrological Data Cover depth (m)

P 2

D 0.91 3ft cover assumed.

NR NR NR NR Cover density (g/cm3)

P 2

S Truncated Normal Site soil type = sand (2017 Hydrogeologic Investigation Report).

Input for density of fill material = NUREG/CR-7267 density distribution for site soil type - sand.

1.5105 0.159 0.001 0.999 1.5105 Cover erosion rate (m/y)

P 2

D 6E-04 Assumed final site grade is level. Input for erosion rate = NUREG/CR-7267 erosion rate for site with shallow slope (i.e.,

relatively level)

NR NR NR NR Density of contaminated zone (g/cm3)

P 1

S Truncated Normal Site soil type = sand (2017 Hydrogeologic Investigation Report).

Input for density of fill material = NUREG/CR-7267 density distribution for site soil type - sand.

1.5105 0.159 0.001 0.999 1.5105

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 9 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Contaminated zone erosion rate (m/y)

P 2

D 6E-04 Assumed same as cover.

NR NR NR NR Contaminated zone total porosity P

2 S

Bounded Normal NUREG/CR-7267 distribution for site soil type -sand 0.43 0.06 0.2446 0.6154 0.43 Contaminated zone field capacity P

3 D

0.18 Value based on site-specific soil type (sand);

calculated using equation in NUREG/CR-7267 (documented in Calculation ENG-OCS-007)

NR NR NR NR Contaminated zone hydraulic conductivity (m/y)

P 2

D 2741 2017 Hydrogeologic Investigation Report NR NR NR NR Contaminated zone b parameter P

2 S

Bounded Log Normal n NUREG/CR-7267 distribution for site soil type - sand

- 0.0253 0.216 0.501 1.90 0.975 Humidity in air (g/m3)

P 3

D 6.6 From Regional and Site-Specific Absolute Humidity Data for Use in Tritium Dose Calculations.

NR NR NR NR Evapotranspiration coefficient P

2 S

Uniform NUREG/CR-7267 distribution 0.5 0.75 NR NR 0.625 Average annual wind speed (m/s)

P 2

D 3.13 Internet search:

https://www.windfinder.co m/windstatistics/oyster_cre ek_barnegat_bay (documented in Calculation ENG-OCS-007).

NR NR NR NR Precipitation (m/y)

P 2

D 1.4 Annual Report on the Meteological Program at Oyster Creek Generating Station - average annual precipitation for 2015 through 2020 (documented in Calculation ENG-OCS-007).

NR NR NR NR Irrigation (m/y)

B 3

S Uniform Distribution determined using methodology described in Data Collection Handbook and NUREG/CR-6697 (documented in Calculation ENG-OCS-007).

0 0.08 0.04 Irrigation mode B

3 D

Overhead Overhead irrigation is common practice for crops in U.S.

NR NR NR NR Runoff coefficient P

2 D

0.2 Value determined using methodology described in Data Collection Handbook and NUREG/CR-7267 (documented in Calculation ENG-OCS-007).

NR NR NR NR Watershed area for nearby stream or pond (m2)

P 3

D 1.01E+08 NJ-GeoWeb (NJDEP BGIS) (documented in Calculation ENG-OCS-007).

NR NR NR NR

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 10 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Accuracy for water/soil computations 3

D 1.00E-03 RESRAD Default NR NR NR NR Saturated Zone Hydrological Data Density of saturated zone (g/cm3)

P 1

S Truncated Normal NUREG/CR-7267 distribution for site soil type -sand 1.5105 0.159 0.001 0.999 1.5105 Saturated zone total porosity P

1 S

Truncated Normal NUREG/CR-7267 distribution for site soil type -sand 0.43 0.06 0.001 0.999 0.43 Saturated zone effective porosity P

1 D

0.25 2017 Hydrogeologic Investigation Report NR NR NR NR Saturated zone field capacity P

3 D

0.18 Value based on site-specific soil type (sand);

calculated using equation in NUREG/CR-7267 NR NR NR NR Saturated zone hydraulic conductivity (m/y)

P 1

D 2741 2017 Hydrogeologic Investigation Report NR NR NR NR Saturated zone hydraulic gradient P

2 S

Uniform 2017 Hydrogeologic Investigation Report 0.01 0.04 0.025 Saturated zone b parameter P

2 S

NR CZ in SZ NR NR NR NR Water table drop rate (m/y)

P 3

D 0

CZ in SZ NR NR NR NR Well pump intake depth (m below water table)

P 2

D 9.6 Set to the distance from the water table to the lower boundary of contamination in the aquifer at the downgradient edge of the contaminated zone.

NR NR NR NR Model:

Nondispersion (ND) or Mass-Balance (MB)

P 3

D ND ND model recommended for contaminant areas

>1,000 m2 NR NR NR NR Well pumping rate (m3/y)

P 2

S NR Drinking water pathway surpressed.

NR NR NR NR Unsaturated Zone Hydrological Data Number of unsaturated zone strata P

3 D

1 See Figure 1.

NR NR NR NR Unsat. zone 1, thickness (m)

P 1

D 3.5 11.5 ft (3.5m) of CZ located between cover and groundwater table.

NR NR NR NR Unsat. zone 1, soil density (g/cm3)

P 2

S Truncated Normal NUREG/CR-7267 distribution for site soil type - sand 1.5105 0.159 0.001 0.999 1.5105 Unsat. zone 1, total porosity P

2 S

Truncated Normal NUREG/CR-7267 distribution for site soil type - sand 0.43 0.06 0.001 0.999 0.43 Unsat. zone 1, effective porosity P

2 D

0.25 2017 Hydrogeologic Investigation Report NR NR NR NR Unsat. zone 1, field capacity P

3 D

0.18 Value based on site-specific soil type (sand);

calculated using equation in NUREG/CR-7267 NR NR NR NR Unsat. zone 1, hydraulic conductivity (m/y)

P 2

D 2741 2017 Hydrogeologic Investigation Report NR NR NR NR Unsat. zone 1, soil-specific b parameter P

2 S

Bounded Log Normal n NUREG/CR-7267 distribution for site soil type - sand

- 0.0253 0.216 0.501 1.90 0.975

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 11 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Occupancy Inhalation rate (m3/y)

B 3

D 8400 NUREG/CR-7267 NR NR NR NR Mass loading for inhalation (g/m3)

P 2

S Continuous linear NUREG/CR-7267 2.3E-5 Exposure duration B

3 D

30 RESRAD Default NR NR NR NR Indoor dust filtration factor P

2 S

Uniform NUREG/CR-7267 0.15 0.95 0.55 Shielding factor, external gamma P

2 S

Bounded lognormal-n NUREG/CR-7267

-1.3 0.59 0.044 1

0.2725 Fraction of time spent indoors B

3 D

0.03 Fraction of calendar year assuming 1h/work day for daily work breaks NR NR NR NR Fraction of time spent outdoors B

3 D

0.2 Fraction of calendar year assuming 7h/work day for outside tasks NR NR NR NR Shape factor flag, external gamma P

3 D

Circular Circular contaminated zone assumed NR NR NR NR Ingestion, Dietary Fruits, vegetables, grain consumption (kg/y)

B 2

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Leafy vegetable consumption (kg/y)

B 3

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Milk consumption (L/y)

B 2

D N/A Input not required - milk ingestion pathway inactive NR NR NR NR Meat and poultry consumption (kg/y)

B 3

D N/A Input not required - meat ingestion pathway inactive NR NR NR NR Fish consumption (kg/y)

B 3

D 20.6 NUREG/CR-5512, Vol. 3 NR NR NR NR Other seafood consumption (kg/y)

B 3

D 0.9 RESRAD Default NR NR NR NR Soil ingestion rate (g/yr)

B 2

S Triangular NUREG/CR-7267 0

0.39 1

0.39 Drinking water intake (L/y)

B 2

D N/A Input not required -

drinking water pathway inactive NR NR NR NR Contamination fraction of drinking water P

3 D

N/A Input not required -

drinking water pathway inactive NR NR NR NR Contamination fraction of household water P

3 N/A Input not required - water pathway inactive Contamination fraction of livestock water P

3 D

N/A Input not required -

drinking water/ingestion pathways inactive NR NR NR NR Contamination fraction of irrigation water P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Contamination fraction of aquatic food P

2 D

Triangular NUREG/CR-7267 NR NR NR NR Contamination fraction of plant food P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Contamination fraction of meat P

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Contamination fraction of milk P

3 D

N/A Input not required - milk ingestion pathway inactive NR NR NR NR Ingestion, Non-Dietary

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 12 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Livestock fodder intake for meat (kg/d)

M 3

D N/A Input not required - meat ingestion pathway inactive NR NR NR NR Livestock fodder intake for milk (kg/d)

M 3

D N/A Input not required - milk ingestion pathway inactive NR NR NR NR Livestock water intake for meat (L/d)

M 3

D N/A Input not required - water ingestion pathway inactive NR NR NR NR Livestock water intake for milk (L/d)

M 3

D N/A Input not required - milk ingestion pathway inactive NR NR NR NR Livestock soil intake (kg/d)

M 3

D N/A Input not required - meat ingestion pathway inactive NR NR NR NR Mass loading for foliar deposition (g/m3)

P 3

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Depth of soil mixing layer (m)

P 2

S Triangular NUREG/CR-7267 0

0.15 0.6 0.23 Depth of roots (m)

P 1

S N/A Input not required - plant ingestion pathway inactive 0.3 4

1.85 Drinking water fraction from ground water P

3 D

N/A Input not required -

drinking water ingestion pathway inactive NR NR NR NR Household water fraction from ground water P

3 N/A Input not required -

drinking water pathway inactive Livestock water fraction from ground water P

3 D

N/A Input not required -

drinking water/meat ingestion pathways inactive NR NR NR NR Irrigation fraction from ground water P

3 D

N/A Input not required -

drinking water pathway inactive NR NR NR NR Wet weight crop yield for Non-Leafy (kg/m2)

P 2

S N/A Input not required - plant ingestion pathway inactive 0.56 0.48 0.001 0.999 1.75 Wet weight crop yield for Leafy (kg/m2)

P 3

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Wet weight crop yield for Fodder (kg/m2)

P 3

D N/A Input not required - meat ingestion pathway inactive NR NR NR NR Growing Season for Non-Leafy (y)

P 3

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Growing Season for Leafy (y)

P 3

D N/A Input not required - plant ingestion pathway inactive NR NR NR NR Growing Season for Fodder (y)

P 3

D N/A Input not required - meat ingestion pathway inactive NR NR NR NR Translocation Factor for Non-Leafy P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Translocation Factor for Leafy P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Translocation Factor for Fodder P

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Weathering Removal Constant for Vegetation (1/y)

P 2

S N/A Input not required - plant ingestion pathway inactive 5.1 18 84 33 Wet Foliar Interception Fraction for Non-Leafy P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Wet Foliar Interception Fraction for Leafy P

2 S

N/A Input not required - plant ingestion pathway inactive 0.06 0.67 0.95 0.58

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 13 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Wet Foliar Interception Fraction for Fodder P

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Dry Foliar Interception Fraction for Non-Leafy P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Dry Foliar Interception Fraction for Leafy P

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Dry Foliar Interception Fraction for Fodder P

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Storage times of contaminated foodstuffs (days):

Fruits, non-leafy vegetables, and grain B

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Leafy vegetables B

3 D

N/A Input not required - plant ingestion pathway inactive NR NR NR NR Milk B

3 D

N/A Input not required - milk ingestion pathway inactive NR NR NR NR Meat and poultry B

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Fish B

3 D

7 RESRAD Default NR NR NR NR Crustacea and mollusks B

3 D

7 RESRAD Default NR NR NR NR Well water B

3 D

N/A Input not required -

drinking water pathway inactive NR NR NR NR Surface water B

3 D

N/A Input not required drinking water pathway inactive NR NR NR NR Livestock fodder B

3 D

N/A Input not required - meat ingestion pathway inactive NR NR NR NR Special Radionuclides (C-14)

C-12 concentration in water (g/cm3)

P 3

D 2.00E-05 RESRAD Default NR NR NR NR C-12 concentration in contaminated soil (g/g)

P 3

D 3.00E-02 RESRAD Default NR NR NR NR Fraction of vegetation carbon from soil P

3 D

2.00E-02 RESRAD Default NR NR NR NR Fraction of vegetation carbon from air P

3 D

9.80E-01 RESRAD Default NR NR NR NR C-14 evasion layer thickness in soil (m)

P 2

S Triangular NUREG/CR-7267 0.2 0.3 0.6 0.3 C-14 evasion flux rate from soil (1/s)

P 3

D 7.00E-07 RESRAD Default NR NR NR NR C-12 evasion flux rate from soil (1/s)

P 3

D 1.00E-10 RESRAD Default NR NR NR NR Fraction of grain in beef cattle feed B

3 D

0.2500 NUREG/CR-7267 NR NR NR NR Fraction of grain in milk cow feed B

3 D

0.1000 NUREG/CR-7267 NR NR NR NR Inhalation Dose Conversion Factors (mrem/pCi inhaled) from FGR11 (contained in RESRAD Dose Conversion Library)

Ingestion Dose Conversion Factors (mrem/pCi ingested) from FGR11 (contained in RESRAD Dose Conversion Library)

Plant Transfer Factors (pCi/g plant)/(pCi/g soil)

Note: Plant ingestion pathway closed - input for plant transfer factors not required for Industrial Use dose calculations.

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 14 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Meat Transfer Factors (pCi/kg)/(pCi/d)

Note: Meat ingestion pathway closed - input for meat transfer factors not required for Industrial Use dose calculations.

Milk Transfer Factors (pCi/L)/(pCi/d)

Note: Milk ingestion pathway closed - input for milk transfer factors not required for Industrial Use dose calculations.

Bioaccumulation Factors for Fish ((pCi/kg)/(pCi/L))

Ac-227 P

2 S

Lognormal-n NUREG/CR-7267 3.2 1.1 2.5E+01 Am-241 P

2 S

Lognormal-n NUREG/CR-7267 5.5 1.1 2.4E+02 Am-243 P

2 S

Lognormal-n NUREG/CR-7267 5.5 1.1 2.4E+02 C-14 P

2 S

Lognormal-n NUREG/CR-7267 13.0 1.1 4.4E+05 Cm-243 P

2 S

Lognormal-n NUREG/CR-7267 3.4 1.1 3.0E+01 Cm-244 P

2 S

Lognormal-n NUREG/CR-7267 3.4 1.1 3.0E+01 Co-60 P

2 S

Lognormal-n NUREG/CR-7267 4.3 0.9 7.4E+01 Cs-137 P

2 S

Lognormal-n NUREG/CR-7267 7.8 0.9 2.4E+03 Eu-152 P

2 S

Lognormal-n NUREG/CR-7267 4.9 1.6 1.3E+02 Eu-154 P

2 S

Lognormal-n NUREG/CR-7267 4.9 1.6 1.3E+02 Fe-55 P

2 S

Lognormal-n NUREG/CR-7267 5.1 1.9 1.6E+02 Gd-152 P

2 S

Lognormal-n NUREG/CR-7267 3.4 1.1 3.0E+01 H-3 P

2 S

Lognormal-n NUREG/CR-7267 0

0.1 1.0E+00 Mn-54 P

2 S

Lognormal-n NUREG/CR-7267 5.5 1.9 2.4E+02 Nb-94 P

2 S

Lognormal-n NUREG/CR-7267 5.7 1.1 3.0E+02 Ni-63 P

2 S

Lognormal-n NUREG/CR-7267 3.0 0.6 2.0E+01 Np-237 P

2 S

Lognormal-n NUREG/CR-7267 3.0 1.1 2.0E+01 Pa-231 P

2 S

Lognormal-n NUREG/CR-7267 2.3 1.1 1.0E+01 Pb-210 P

2 S

Lognormal-n NUREG/CR-7267 3.2 1.1 2.5E+02 Po-210 P

2 S

Lognormal-n NUREG/CR-7267 3.6 1.5 3.7E+01 Pu-238 P

2 S

Lognormal-n NUREG/CR-7267 10.0 1.0 2.2E+04 Pu-239 P

2 S

Lognormal-n NUREG/CR-7267 10.0 1.0 2.2E+04 Pu-240 P

2 S

Lognormal-n NUREG/CR-7267 10.0 1.0 2.2E+04 Pu-241 P

2 S

Lognormal-n NUREG/CR-7267 10.0 1.0 2.2E+04 Ra-226 P

2 S

Lognormal-n NUREG/CR-7267 1.4 1.9 4.1E+00 Ra-228 P

2 S

Lognormal-n NUREG/CR-7267 1.4 1.9 4.1E+00 Sb-125 P

2 S

Lognormal-n NUREG/CR-7267 3.6 1.5 3.7E+01 Sr-90 P

2 S

Lognormal-n NUREG/CR-7267 1.1 1.4 3.0E+00 Tc-99 P

2 S

Lognormal-n NUREG/CR-7267 3.0 1.1 2.0E+01 Te-12m P

2 S

Lognormal-n NUREG/CR-7267 5.0 0.4 1.5E+02 Th-228 P

2 S

Lognormal-n NUREG/CR-7267 4.6 1.1 9.9E+01 Th-229 P

2 S

Lognormal-n NUREG/CR-7267 4.6 1.1 9.9E+01 Th-230 P

2 S

Lognormal-n NUREG/CR-7267 4.6 1.1 9.9E+01 Th-232 P

2 S

Lognormal-n NUREG/CR-7267 4.6 1.1 9.9E+01 U-233 P

2 S

Lognormal-n NUREG/CR-7267 0.0 2.5 1.0E+00 U-234 P

2 S

Lognormal-n NUREG/CR-7267 0.0 2.5 1.0E+00 U-235 P

2 S

Lognormal-n NUREG/CR-7267 0.0 2.5 1.0E+00 U-236 P

2 S

Lognormal-n NUREG/CR-7267 0.0 2.5 1.0E+00 Bioaccumulation Factors for Crustacea/ Mollusks ((pCi/kg)/(pCi/L)) RESRAD default value for each radionuclide applied Graphics Parameters Number of points 32 RESRAD Default NR NR NR NR Spacing log RESRAD Default NR NR NR NR

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 15 of 38 Input Values for Probabilistic Analysis: OC BFM Instantaneous Release (In Situ) Scenario to Support the Industrial Use Compliance Scenario Time integration parameters Maximum number of points for dose 17 RESRAD Default NR NR NR NR Table 2 Notes:

a P = physical, B = behavioral, M = metabolic b 1 = high-priority parameter, 2 = medium-priority parameter, 3 = low-priority parameter c D = deterministic, S = stochastic d Distributions Statistical Parameters:

Lognormal-n: 1= mean, 2 = standard deviation Bounded lognormal-n: 1= mean, 2 = standard deviation, 3 = minimum, 4 = maximum Truncated lognormal-n: 1= mean, 2 = standard deviation, 3 = lower quantile, 4 = upper quantile Bounded normal: 1 = mean, 2 = standard deviation, 3 = minimum, 4 = maximum Triangular: 1 = minimum, 2 = mode, 3 = maximum Uniform: 1 = minimum, 2 = maximum NR = not required I I I

I I

I I I I

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 16 of 38 Table 3: Sensitive Input Parameter by Radionuclide Radionuclide Sensitive Parameter PRCC Value Am-241 Kd of Am-241 in CZ Kd of Am-241 in UZ Depth of soil mixing layer 0.34

-0.29 0.63 C-14 Density of cover material Kd of C14 in CZ Kd of C14 in UZ

-0.86 0.41

-0.30 Cm-243 Depth of soil mixing layer Kd of Am-243 in CZ Kd of Pu-239 in UZ 0.48 0.26

-0.54 Cm-244 Depth of soil mixing layer Kd of Pu-240 in CZ Kd of Pu-240 in UZ 0.50 0.43

-0.55 Co-60 Density of cover material Kd of Co-60 in CZ External gamma shielding factor

-1.0 0.42 0.26 Cs-137 Density of cover material External gamma shielding factor

-1.0 0.80 Eu-152 Density of cover material Kd of Eu-152 in CZ

-0.99 0.42 Eu-154 Density of cover material Kd of Eu-154 in CZ

-0.99 0.40 Fe-55 No sensitive parameter identified H-3 SZ hydraulic gradient Aquatic food fraction

-0.47 0.66 Mn-54 Density of cover material External gamma shielding factor Kd of Mn-54 in CZ

-1.0 0.58 0.28 Nb-94 Density of cover material SZ hydraulic gradient Kd of Nb-94 in CZ

-0.83

-0.49 0.91 Ni-63 Kd of Ni-63 in UZ

-0.41 Np-237 Density of cover material Kd of Np-237 in CZ Kd of Np-237 in UZ

-0.25 0.57

-0.67 Pu-238 Density of cover material Kd of U-234 in CZ Kd of U-234 in UZ

-0.52 0.31

-0.53 Pu-239 Depth of soil mixing layer Kd of Pu-239 in CZ Kd of Pu-239 in UZ 0.45 0.55

-0.57 Pu-240 Density of cover material Kd of Pu-240 in UZ Kd of U-236 in UZ

-0.26

-0.49

-0.39 Pu-241 Kd of Am-241 in CZ Kd of Am-241 in UZ Depth of soil mixing layer 0.32

-0.33 0.64

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 17 of 38 Radionuclide Sensitive Parameter PRCC Value Sb-125 Density of cover material Kd of Sb-125 in CZ

-1.0 0.63 Sr-90 Density of cover material Kd of Sr-90 in CZ Kd of Sr-90 in UZ

-0.55 0.59

-0.56 Tc-99 Aquatic foods fraction Kd of Tc-99 in UZ Fish TF for Tc Evapotranspiration coefficient 0.41

-0.55 0.67

-0.30

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 18 of 38 Table 4: RESRAD-Generated Percentile Values for Sensitive Input Parameters Sensitive Input Parameter Affected Nuclide RESRAD Percentile Valuea 25th 75th Kd in CZ (cm3/g)

Am-241 Am-243 C-14 Co-60 Eu-152 Eu-154 Mn-54 Nb-94 Np-237 Pu-239 Pu-240 Sb-125 Sr-90 U-234 3.71E+03 3.71E+03 7.11E+01 3.71E+01 1.41E+04 1.41E+04 5.78E+03 3.80E+03 3.56E+01 1.02E+03 1.02E+03 5.64E+01 6.58E+00 2.07E+01 Kd in UZ (cm3/g)

Am-241 C-14 Ni-63 Np-237 Pu-239 Pu-240 Sr-90 Tc-99 U-234 U-236 2.69E+02 6.14E+00 2.77E+01 5.49E+00 1.57E+02 1.57E+02 6.58E+00 1.94E-02 2.07E+01 2.07E+01 Density of cover material C-14 Co-60 Cs-137 Eu-152 Eu-154 Mn-54 Nb-94 Np-237 Pu-238 Pu-240 Sb-125 Sr-90 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 1.40E+00 SZ hydraulic gradient H-3 Nb-94 1.75E-02 1.75E-02 External gamma shielding factor Co-60 Cs-137 Mn-54 4.00E-01 4.00E-01 4.00E-01 Fish transfer factor (pCi/g per pCi/l)

Tc 4.21E+01

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 19 of 38 Sensitive Input Parameter Affected Nuclide RESRAD Percentile Valuea 25th 75th Depth of soil mixing layer Am-241 Cm-243 Cm-244 Pu-239 Pu-241 3.40E-01 3.40E-01 3.40E-01 3.40E-01 3.40E-01 Aquatic food fraction H-3 Tc-99 6.10E-01 6.10E-01 Evapotranspiration coefficient Tc-99 5.62E-01

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 20 of 38 OCS Groundwater Depth

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 21 of 38 Well Date DTW General Location Average Depth (fbg)

MW-15K-1A 7/26/2021 8.05 West of TB 8.9 MW-15K-1A 10/24/2022 8.21 MW-15K-1A 1/27/2020 8.82 MW-15K-1A 4/25/2022 8.92 MW-15K-1A 5/19/2020 8.97 MW-15K-1A 5/3/2021 9.05 MW-15K-1A 10/18/2021 9.34 MW-15K-1A 8/17/2020 9.53 MW-15K-1A 4/18/2023 9.61 MW-16D 7/26/2021 16.60 North side of RB 17.0 MW-16D 10/24/2022 16.75 MW-16D 10/18/2021 16.85 MW-16D 1/27/2020 17.00 MW-16D 5/3/2021 17.03 MW-16D 4/24/2023 17.11 MW-16D 8/17/2020 17.18 MW-16D 5/19/2020 17.26 MW-16D 4/25/2022 17.43 MW-1A-2A 7/26/2021 14.55 South of ORB 15.5 MW-1A-2A 5/3/2021 14.92 MW-1A-2A 5/19/2020 15.10 MW-1A-2A 1/27/2020 15.20 MW-1A-2A 10/18/2021 15.31 MW-1A-2A 10/24/2022 15.42 MW-1A-2A 4/25/2022 15.92 MW-1A-2A 8/17/2020 16.24 MW-1A-2A 10/12/2020 16.55 MW-1I-1A 7/26/2021 10.82 North of TB 11.8 MW-1I-1A 5/3/2021 11.11 MW-1I-1A 5/19/2020 11.46 MW-1I-1A 1/27/2020 11.67 MW-1I-1A 10/24/2022 11.71 MW-1I-1A 10/18/2021 11.85 MW-1I-1A 4/25/2022 12.28 MW-1I-1A 4/24/2023 12.32 MW-1I-1A 8/17/2020 12.58 MW-1I-1A 10/12/2020 12.62 MW-1I-2A 7/26/2021 11.30 North of TB 12.3 MW-1I-2A 5/3/2021 11.65 MW-1I-2A 10/24/2022 12.03 MW-1I-2A 5/19/2020 12.11 MW-1I-2A 1/27/2020 12.25 MW-1I-2A 10/18/2021 12.35 MW-1I-2A 4/25/2022 12.68 MW-1I-2A 4/20/2023 12.70 MW-1I-2A 8/17/2020 13.04 MW-1I-2A 10/12/2020 13.23 MW-24-3A Farm 5/3/2023 10.16 Not considered - REMP control

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 22 of 38 Well Date DTW General Location Average Depth (fbg)

MW-24-3A Farm 5/3/2021 10.58 MW-24-3A Farm 10/24/2022 10.62 MW-24-3A Farm 1/27/2020 10.67 MW-24-3A Farm 4/25/2022 10.70 MW-24-3A Farm 5/19/2020 10.90 MW-24-3A Farm 2/8/2021 10.94 MW-24-3A Farm 10/18/2021 11.00 MW-24-3A Farm 1/27/2020 11.24 MW-24-3A Farm 10/12/2020 11.54 MW-52 10/12/2020 9.80 Not considered - too far west MW-52 8/17/2020 10.20 MW-52 10/24/2022 10.59 MW-52 10/18/2021 10.64 MW-52 5/3/2021 10.65 MW-52 1/27/2020 10.68 MW-52 4/20/2023 10.80 MW-52 4/25/2022 10.81 MW-52 5/19/2020 10.96 MW-53 10/24/2022 10.17 West of TB 10.9 MW-53 4/25/2022 10.70 MW-53 1/27/2020 10.71 MW-53 5/3/2021 10.85 MW-53 5/19/2020 10.90 MW-53 10/12/2020 11.05 MW-53 10/18/2021 11.20 MW-53 4/18/2023 11.30 MW-53 8/17/2020 11.34 MW-54 10/12/2020 5.53 Not considered - too far west MW-54 1/27/2020 7.00 MW-54 8/17/2020 7.25 MW-54 10/24/2022 7.54 MW-54 10/18/2021 7.75 MW-54 4/25/2022 7.80 MW-54 5/3/2021 7.82 MW-54 4/20/2023 8.11 MW-54 5/19/2020 8.20 MW-55 10/12/2020 9.86 West of TB 10.6 MW-55 8/17/2020 10.25 MW-55 10/24/2022 10.42 MW-55 7/26/2021 10.43 MW-55 1/27/2020 10.61 MW-55 10/18/2021 10.80 MW-55 4/18/2022 10.85 MW-55 4/25/2022 10.90 MW-55 5/3/2021 10.93 MW-55 5/19/2020 11.25 MW-56I 10/24/2022 10.65 West of TB 11.1 MW-56I 8/17/2020 10.68

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 23 of 38 Well Date DTW General Location Average Depth (fbg)

MW-56I 7/26/2021 10.91 MW-56I 1/27/2020 11.02 MW-56I 10/18/2021 11.10 MW-56I 10/12/2020 11.11 MW-56I 4/18/2023 11.15 MW-56I 5/3/2021 11.45 MW-56I 4/25/2022 11.60 MW-56I 5/19/2020 11.65 MW-57I 10/12/2020 10.10 Not considered - too far west MW-57I 8/17/2020 10.45 MW-57I 10/24/2022 10.75 MW-57I 10/18/2021 10.92 MW-57I 4/20/2023 10.95 MW-57I 7/26/2021 11.03 MW-57I 5/19/2020 11.08 MW-57I 5/3/2021 11.10 MW-57I 1/27/2020 11.20 MW-57I 4/25/2022 11.23 MW-59I 10/12/2020 12.47 West of TB 13.1 MW-59I 10/24/2022 12.79 MW-59I 8/17/2020 12.90 MW-59I 7/26/2021 13.15 MW-59I 10/18/2021 13.15 MW-59I 4/18/2023 13.15 MW-59I 1/27/2020 13.30 MW-59I 5/3/2021 13.40 MW-59I 5/19/2020 13.42 MW-59I 4/25/2022 13.47 MW-61I 10/24/2022 10.37 West of TB 10.9 MW-61I 10/12/2020 10.43 MW-61I 8/17/2020 10.45 MW-61I 4/18/2023 10.60 MW-61I 1/27/2020 10.84 MW-61I 4/25/2022 10.95 MW-61I 10/18/2021 11.05 MW-61I 7/26/2021 11.10 MW-61I 5/3/2021 11.30 MW-61I 5/19/2020 11.47 MW-62 10/18/2021 11.65 North of TB 13.3 MW-62 10/12/2020 12.82 MW-62 7/26/2021 12.90 MW-62 1/27/2020 13.17 MW-62 8/17/2020 13.36 MW-62 5/19/2020 13.51 MW-62 10/24/2022 13.56 MW-62 5/3/2021 13.75 MW-62 4/25/2022 13.98 MW-62 4/24/2023 14.41

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 24 of 38 Well Date DTW General Location Average Depth (fbg)

MW-64 10/12/2020 9.85 Not considered - too far west MW-64 8/17/2020 10.43 MW-64 10/24/2022 10.62 MW-64 7/26/2021 10.65 MW-64 10/18/2021 10.80 MW-64 5/3/2021 11.00 MW-64 4/20/2023 11.02 MW-64 1/27/2020 11.06 MW-64 4/25/2022 11.15 MW-64 5/19/2020 11.30 MW-65 5/19/2020 11.51 West of TB 12.2 MW-65 10/24/2022 11.64 MW-65 10/12/2020 11.90 MW-65 8/17/2020 12.05 MW-65 7/26/2021 12.13 MW-65 10/18/2021 12.27 MW-65 4/18/2023 12.41 MW-65 5/3/2021 12.45 MW-65 4/25/2022 12.53 MW-65 1/27/2020 12.68 MW-67 10/24/2022 18.22 inside TB footprint 18.6 MW-67 7/26/2021 18.30 MW-67 5/19/2020 18.44 MW-67 4/24/2023 18.47 MW-67 8/17/2020 18.59 MW-67 1/27/2020 18.68 MW-67 4/25/2022 18.78 MW-67 10/18/2021 18.85 MW-67 5/3/2021 18.87 MW-67 10/12/2020 19.03 MW-68I 8/17/2020 17.25 South of RB 17.4 MW-68I 10/12/2020 17.51 MW-71 7/26/2021 15.62 South of RB 16.2 MW-71 10/24/2022 15.64 MW-71 1/27/2020 16.03 MW-71 10/18/2021 16.05 MW-71 5/3/2021 16.10 MW-71 5/19/2020 16.35 MW-71 8/17/2020 16.40 MW-71 4/24/2023 16.43 MW-71 4/25/2022 16.61 MW-71 10/12/2020 16.81 MW-72 10/24/2022 17.92 North of RB 18.2 MW-72 7/26/2021 17.94 MW-72 1/27/2020 17.98 MW-72 10/18/2021 18.03 MW-72 8/17/2020 18.05 MW-72 5/3/2021 18.20

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 25 of 38 Well Date DTW General Location Average Depth (fbg)

MW-72 4/24/2023 18.21 MW-72 5/19/2020 18.30 MW-72 4/25/2022 18.42 MW-72 10/12/2020 18.50 W-10 7/26/2021 17.57 South of RB 17.8 W-10 8/17/2020 17.61 W-10 1/27/2020 17.64 W-10 4/24/2023 17.75 W-10 10/24/2022 17.79 W-10 10/18/2021 17.80 W-10 10/12/2020 17.88 W-10 5/3/2021 17.90 W-10 4/25/2022 18.09 W-10 5/19/2020 18.15 W-12 7/26/2021 13.20 North of RB 13.9 W-12 4/25/2022 13.52 W-12 5/3/2021 13.60 W-12 10/24/2022 13.76 W-12 10/18/2021 13.80 W-12 5/19/2020 13.85 W-12 1/27/2020 13.90 W-12 4/24/2023 14.20 W-12 8/17/2020 14.45 W-12 10/12/2020 14.85 W-13 10/24/2022 19.02 North of RB 19.5 W-13 8/17/2020 19.10 W-13 7/26/2021 19.22 W-13 1/27/2020 19.26 W-13 10/18/2021 19.37 W-13 4/24/2023 19.47 W-13 4/25/2022 19.48 W-13 10/12/2020 19.52 W-13 5/19/2020 19.73 W-13 5/3/2021 20.65 W-14 10/24/2022 17.70 NW of ORB 17.3 W-14 8/17/2020 17.90 W-14 7/26/2021 17.95 W-14 1/27/2020 17.96 W-14 4/24/2023 18.11 W-14 10/18/2021 18.12 W-14 5/3/2021 18.30 W-14 4/25/2022 18.31 W-14 5/19/2020 18.45 W-15 7/26/2021 10.35 NW of ORB 11.4 W-15 5/3/2021 10.60 W-15 1/27/2020 10.87 W-15 10/18/2021 11.13 W-15 4/25/2022 11.37

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 26 of 38 Well Date DTW General Location Average Depth (fbg)

W-15 10/24/2022 11.41 W-15 5/19/2020 11.80 W-15 4/24/2023 12.01 W-15 8/17/2020 12.07 W-15 10/12/2020 12.45 W-16 7/26/2021 8.07 Not considered - too far north W-16 5/3/2021 8.33 W-16 5/19/2020 8.53 W-16 1/27/2020 8.65 W-16 10/18/2021 8.87 W-16 10/24/2022 9.00 W-16 4/25/2022 9.17 W-16 4/24/2023 9.23 W-16 8/17/2020 9.71 W-16 10/12/2020 10.30 W-1A 8/17/2020 19.25 Not considered - outside PA W-1A 10/24/2022 19.29 W-1A 1/27/2020 19.62 W-1A 10/18/2021 19.72 W-1A 10/12/2020 19.75 W-1A 4/24/2023 20.09 W-1A 4/25/2022 20.34 W-1A 5/3/2021 20.46 W-1A 5/19/2020 20.56 W-24 7/26/2021 12.58 South of TB 13.7 W-24 10/24/2022 12.72 W-24 5/3/2021 13.12 W-24 1/27/2020 13.30 W-24 5/19/2020 13.50 W-24 10/18/2021 13.73 W-24 4/25/2022 14.27 W-24 10/12/2020 14.65 W-24 8/17/2020 14.75 W-24 4/24/2023 14.77 W-3 7/26/2021 14.25 West of TB 15.4 W-3 10/18/2021 14.35 W-3 10/24/2022 14.56 W-3 5/3/2021 15.26 W-3 4/20/2023 15.58 W-3 4/25/2022 15.83 W-3 10/12/2020 15.86 W-3 1/27/2020 15.95 W-3 5/19/2020 16.08 W-3 8/17/2020 16.25 W-34 10/24/2022 17.56 South of TB 18.0 W-34 7/26/2021 17.73 W-34 10/12/2020 17.76 W-34 10/18/2021 17.98

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 27 of 38 Well Date DTW General Location Average Depth (fbg)

W-34 8/17/2020 18.00 W-34 1/27/2020 18.10 W-34 5/3/2021 18.15 W-34 4/24/2023 18.16 W-34 4/25/2022 18.34 W-34 5/19/2020 18.35 W-4 8/17/2020 16.20 West of TB 16.7 W-4 7/26/2021 16.45 W-4 1/27/2020 16.50 W-4 10/12/2020 16.52 W-4 10/18/2021 16.56 W-4 10/24/2022 16.62 W-4 4/20/2023 16.65 W-4 4/25/2022 16.92 W-4 5/3/2021 17.02 W-4 5/19/2020 17.15 W-4A 10/24/2022 12.40 Not considered - too far SE W-4A 1/27/2020 12.51 W-4A 1/27/2020 12.52 W-4A 2/8/2021 12.55 W-4A 10/18/2021 12.70 W-4A 4/24/2023 12.70 W-4A 10/12/2020 12.71 W-4A 5/3/2021 12.76 W-4A 4/25/2022 12.81 W-4A 5/19/2020 12.98 W-5 7/26/2021 11.61 Not considered - too far NW W-5 5/3/2021 12.15 W-5 10/24/2022 12.27 W-5 5/19/2020 12.30 W-5 1/27/2020 12.35 W-5 10/18/2021 12.75 W-5 4/25/2022 12.82 W-5 4/24/2023 13.00 W-5 10/12/2020 13.05 W-5 8/17/2020 13.10 W-6 8/17/2020 19.64 Not considered - too far NW W-6 7/26/2021 19.95 W-6 10/12/2020 20.03 W-6 1/27/2020 20.05 W-6 4/24/2023 20.08 W-6 10/18/2021 20.15 W-6 10/24/2022 20.20 W-6 4/25/2022 20.36 W-6 5/3/2021 20.55 W-6 5/19/2020 20.60 W-9 10/24/2022 14.34 South of RB 15.2 W-9 7/26/2021 14.45

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 28 of 38 Well Date DTW General Location Average Depth (fbg)

W-9 5/3/2021 14.91 W-9 1/27/2020 15.03 W-9 10/18/2021 15.05 W-9 5/19/2020 15.15 W-9 4/25/2022 15.58 W-9 4/24/2023 15.66 W-9 8/17/2020 15.70 W-9 10/12/2020 16.00 Average All 13.89 Average for wells near TB, RB, and ORB 14.5

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 29 of 38 PRCC Values at Time of Peak of the Mean Dose

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 30 of 38 Am-241 Results:

RESRAD Regression and Correlation output 10/26/23 16:04 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Am241 Input File : BFM-IU_AM241.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Kd of Am-241 in Contaminated Zone 2 0.14 2 0.11 2 0.34 2 0.25 Kd of Am-241 in Unsaturated Zone 1 12 -0.02 18 -0.02 3 -0.29 3 -0.21 Kd of Am-241 in Saturated Zone 18 -0.01 22 -0.01 25 -0.01 28 -0.01 Kd of Np-237 in Contaminated Zone 19 -0.01 23 -0.01 7 0.15 7 0.10 Kd of Np-237 in Unsaturated Zone 1 10 -0.02 15 -0.02 27 -0.01 29 -0.01 Kd of Np-237 in Saturated Zone 20 -0.01 24 -0.01 14 -0.03 16 -0.02 Kd of Th-229 in Contaminated Zone 31 0.00 31 0.00 30 -0.01 32 0.00 Kd of Th-229 in Unsaturated Zone 1 34 0.00 34 0.00 12 0.03 14 0.02 Kd of Th-229 in Saturated Zone 8 -0.02 13 -0.02 16 -0.03 18 -0.02 Kd of U-233 in Contaminated Zone 30 0.00 30 0.00 17 0.02 20 0.01 Kd of U-233 in Unsaturated Zone 1 33 0.00 33 0.00 34 0.00 34 0.00 Kd of U-233 in Saturated Zone 22 0.01 26 0.01 33 0.00 33 0.00 Density of cover material 21 -0.01 25 -0.01 8 -0.11 9 -0.07 Density of contaminated zone 24 -0.01 10 -0.02 32 0.00 26 -0.01 Contaminated zone total porosity 14 -0.02 5 -0.04 10 -0.04 8 -0.08 Contaminated zone b parameter 28 0.00 28 0.00 24 0.01 27 0.01 Evapotranspiration coefficient 9 -0.02 14 -0.02 9 -0.08 10 -0.05 Irrigation 7 0.03 12 0.02 18 0.02 22 0.01 Density of saturated zone 23 -0.01 9 -0.02 19 -0.02 11 -0.04 Saturated zone total porosity 25 -0.01 11 -0.02 23 -0.01 12 -0.03 Saturated zone hydraulic gradient 4 -0.09 4 -0.07 4 -0.24 4 -0.17 Density of Unsaturated zone 1 26 -0.01 16 -0.02 31 -0.01 21 -0.01 Total Porosity of Unsaturated zone 1 17 -0.01 7 -0.04 26 0.01 19 0.02 b Parameter of Unsaturated zone 1 16 -0.02 21 -0.01 21 0.02 24 0.01 Mass loading for inhalation 6 0.04 8 0.03 15 0.03 17 0.02 Indoor dust filtration factor 32 0.00 32 0.00 22 -0.01 25 -0.01 External gamma shielding factor 11 0.02 17 0.02 29 -0.01 31 0.00 Soil ingestion 3 0.14 3 0.11 11 0.04 13 0.02 Aquatic food 13 0.02 19 0.01 6 0.22 6 0.15 Depth of soil mixing layer 1 0.61 1 0.60 1 0.63 1 0.56 Fish transfer factor for Am 5 0.05 6 0.04 13 0.03 15 0.02 Fish transfer factor for Np 27 -0.01 27 -0.01 5 0.24 5 0.17 Fish transfer factor for Th 29 0.00 29 0.00 20 -0.02 23 -0.01 Fish transfer factor for U 15 -0.02 20 -0.01 28 -0.01 30 0.00 C-14 Results:

RESRAD Regression and Correlation output 10/27/23 12:56 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_C14 Input File : BFM-IU_C14.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 19 -0.01 19 -0.01 1 -0.86 1 -0.83 Density of contaminated zone 15 0.01 7 0.05 11 0.03 4 0.04 Contaminated zone total porosity 22 0.00 20 0.01 15 0.01 8 0.02 Contaminated zone b parameter 7 -0.03 12 -0.03 18 0.00 20 0.00 Evapotranspiration coefficient 17 0.01 17 0.01 13 -0.02 14 -0.01 Irrigation 4 0.03 9 0.03 17 -0.01 18 -0.01 Density of saturated zone 10 0.02 3 0.08 23 0.00 23 0.00 Saturated zone total porosity 12 0.02 5 0.06 20 0.00 16 0.01 Saturated zone hydraulic gradient 16 -0.01 16 -0.01 4 -0.07 6 -0.04 Density of Unsaturated zone 1 11 0.02 4 0.07 12 -0.02 5 -0.04 Total Porosity of Unsaturated zone 1 9 0.02 1 0.08 22 0.00 19 0.00 b Parameter of Unsaturated zone 1 20 -0.01 21 -0.01 19 0.00 21 0.00 Mass loading for inhalation 13 -0.02 14 -0.02 16 0.01 17 0.01 Indoor dust filtration factor 6 -0.03 11 -0.03 5 -0.06 7 -0.03 External gamma shielding factor 14 -0.02 15 -0.02 7 -0.03 10 -0.01 Soil ingestion 3 0.03 8 0.03 6 -0.03 9 -0.02 Aquatic food 2 0.06 6 0.06 8 0.03 11 0.01 Depth of soil mixing layer 23 0.00 23 0.00 14 0.01 15 0.01 Thickness of evasion layer of C-14 in soil 18 0.01 18 0.01 10 0.03 13 0.01 Fish transfer factor for C 1 0.08 2 0.08 21 0.00 22 0.00 Kd of C-14 in Contaminated Zone 8 -0.03 13 -0.03 2 0.41 2 0.22 Kd of C-14 in Unsaturated Zone 1 5 -0.03 10 -0.03 3 -0.30 3 -0.15 Kd of C-14 in Saturated Zone 21 -0.01 22 -0.01 9 0.03 12 0.01 Cm-243 Results:

RESRAD Regression and Correlation output 10/27/23 14:39 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Cm243 Input File : BFM-IU_CM243.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 42 0.00 42 0.00 4 -0.18 4 -0.13 Density of contaminated zone 37 -0.01 23 -0.02 16 0.03 6 0.08 Contaminated zone total porosity 36 -0.01 17 -0.03 33 0.01 17 0.03 Contaminated zone b parameter 12 -0.03 14 -0.03 23 -0.02 26 -0.02 Evapotranspiration coefficient 11 -0.03 13 -0.03 6 -0.10 7 -0.07 Irrigation 16 -0.02 20 -0.02 32 0.01 33 0.01 Density of saturated zone 25 -0.02 8 -0.05 42 0.00 41 0.00 Saturated zone total porosity 33 -0.01 16 -0.03 40 0.00 37 -0.01

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 31 of 38 Saturated zone hydraulic gradient 17 -0.02 21 -0.02 8 -0.10 9 -0.07 Density of Unsaturated zone 1 6 -0.05 2 -0.14 27 -0.02 14 -0.04 Total Porosity of Unsaturated zone 1 19 -0.02 5 -0.07 26 0.02 12 0.05 b Parameter of Unsaturated zone 1 21 -0.02 25 -0.02 30 0.02 31 0.01 Mass loading for inhalation 15 -0.02 19 -0.02 22 0.03 25 0.02 Indoor dust filtration factor 20 -0.02 24 -0.02 20 -0.03 23 -0.02 External gamma shielding factor 35 -0.01 37 -0.01 14 0.04 18 0.03 Soil ingestion 7 0.04 9 0.04 12 0.05 15 0.03 Aquatic food 2 0.11 3 0.10 13 0.05 16 0.03 Depth of soil mixing layer 30 0.01 33 0.01 2 0.48 2 0.40 Kd of Ac-227 in Contaminated Zone 27 0.01 30 0.01 21 -0.03 24 -0.02 Kd of Ac-227 in Unsaturated Zone 1 14 -0.03 18 -0.03 17 -0.03 20 -0.02 Kd of Ac-227 in Saturated Zone 8 -0.04 10 -0.04 24 -0.02 27 -0.02 Fish transfer factor for Ac 41 0.00 41 0.00 38 -0.01 39 0.00 Kd of Am-243 in Contaminated Zone 22 0.02 26 0.02 3 0.26 3 0.20 Kd of Am-243 in Unsaturated Zone 1 39 0.01 39 0.01 10 -0.07 11 -0.05 Kd of Am-243 in Saturated Zone 38 0.01 38 0.01 34 -0.01 34 -0.01 Fish transfer factor for Am 26 -0.01 29 -0.01 29 -0.02 30 -0.01 Kd of Cm-243 in Contaminated Zone 4 0.07 6 0.06 11 0.06 13 0.04 Kd of Cm-243 in Unsaturated Zone 1 18 -0.02 22 -0.02 9 -0.07 10 -0.05 Kd of Cm-243 in Saturated Zone 29 -0.01 32 -0.01 31 0.02 32 0.01 Fish transfer factor for Cm 40 0.00 40 0.00 18 -0.03 21 -0.02 Kd of Pa-231 in Contaminated Zone 28 -0.01 31 -0.01 19 -0.03 22 -0.02 Kd of Pa-231 in Unsaturated Zone 1 13 0.03 15 0.03 36 0.01 36 0.01 Kd of Pa-231 in Saturated Zone 24 0.02 28 0.02 15 0.04 19 0.03 Fish transfer factor for Pa 34 -0.01 36 -0.01 37 0.01 38 0.00 Kd of Pu-239 in Contaminated Zone 5 -0.05 7 -0.05 5 0.16 5 0.12 Kd of Pu-239 in Unsaturated Zone 1 3 -0.10 4 -0.10 1 -0.54 1 -0.46 Kd of Pu-239 in Saturated Zone 10 0.04 12 0.04 25 -0.02 28 -0.02 Fish transfer factor for Pu 1 0.17 1 0.16 7 0.10 8 0.07 Kd of U-235 in Contaminated Zone 23 -0.02 27 -0.02 39 0.00 40 0.00 Kd of U-235 in Unsaturated Zone 1 31 -0.01 34 -0.01 41 0.00 42 0.00 Kd of U-235 in Saturated Zone 9 0.04 11 0.04 35 -0.01 35 -0.01 Fish transfer factor for U 32 -0.01 35 -0.01 28 0.02 29 0.01 Cm-244 Results:

RESRAD Regression and Correlation output 10/27/23 18:15 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Cm244 Input File : BFM-IU_CM244.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 7 0.04 9 0.04 5 -0.12 6 -0.08 Density of contaminated zone 12 -0.02 6 -0.07 13 -0.04 7 -0.08 Contaminated zone total porosity 17 -0.02 7 -0.05 12 -0.04 5 -0.08 Contaminated zone b parameter 8 0.04 11 0.04 32 -0.01 32 -0.01 Evapotranspiration coefficient 29 -0.01 31 -0.01 8 -0.06 13 -0.04 Irrigation 11 0.02 15 0.02 6 0.09 9 0.06 Density of saturated zone 34 -0.01 17 -0.02 16 -0.03 8 -0.07 Saturated zone total porosity 25 0.01 14 0.03 22 -0.03 10 -0.06 Saturated zone hydraulic gradient 6 -0.05 8 -0.04 4 -0.18 4 -0.13 Density of Unsaturated zone 1 37 0.00 21 -0.01 26 -0.02 12 -0.04 Total Porosity of Unsaturated zone 1 20 0.01 10 0.04 31 0.01 16 0.03 b Parameter of Unsaturated zone 1 32 -0.01 34 -0.01 18 0.03 21 0.02 Mass loading for inhalation 24 -0.01 27 -0.01 24 0.02 26 0.01 Indoor dust filtration factor 41 0.00 41 0.00 39 0.00 39 0.00 External gamma shielding factor 13 -0.02 16 -0.02 29 -0.02 30 -0.01 Soil ingestion 16 -0.02 20 -0.02 21 0.03 24 0.02 Aquatic food 4 0.08 4 0.08 9 0.05 14 0.04 Depth of soil mixing layer 3 0.09 3 0.08 2 0.50 2 0.40 Fish transfer factor for Cm 27 -0.01 29 -0.01 35 0.01 35 0.01 Fish transfer factor for Pu 1 0.18 1 0.18 10 0.04 15 0.03 Fish transfer factor for U 40 0.00 40 0.00 14 0.03 18 0.02 Kd of Cm-244 in Contaminated Zone 10 0.03 13 0.03 37 0.01 37 0.00 Kd of Cm-244 in Unsaturated Zone 1 31 0.01 33 0.01 7 -0.07 11 -0.05 Kd of Cm-244 in Saturated Zone 18 0.01 22 0.01 25 0.02 27 0.01 Kd of Pu-240 in Contaminated Zone 9 -0.03 12 -0.03 3 0.43 3 0.33 Kd of Pu-240 in Unsaturated Zone 1 5 -0.08 5 -0.07 1 -0.55 1 -0.45 Kd of Pu-240 in Saturated Zone 22 -0.01 25 -0.01 19 0.03 22 0.02 Kd of Ra-228 in Contaminated Zone 39 0.00 39 0.00 30 0.01 31 0.01 Kd of Ra-228 in Unsaturated Zone 1 15 -0.02 19 -0.02 40 0.00 40 0.00 Kd of Ra-228 in Saturated Zone 38 0.00 38 0.00 15 0.03 19 0.02 Kd of Th-228 in Contaminated Zone 2 0.09 2 0.09 41 0.00 41 0.00 Kd of Th-228 in Unsaturated Zone 1 28 -0.01 30 -0.01 34 -0.01 34 -0.01 Kd of Th-228 in Saturated Zone 33 -0.01 35 -0.01 28 -0.02 29 -0.01 Kd of Th-232 in Contaminated Zone 23 -0.01 26 -0.01 17 -0.03 20 -0.02 Kd of Th-232 in Unsaturated Zone 1 26 -0.01 28 -0.01 38 0.00 38 0.00 Kd of Th-232 in Saturated Zone 35 0.01 36 0.01 27 -0.02 28 -0.01 Kd of U-236 in Contaminated Zone 36 0.00 37 0.00 23 -0.03 25 -0.02 Kd of U-236 in Unsaturated Zone 1 14 0.02 18 0.02 11 -0.04 17 -0.03 Kd of U-236 in Saturated Zone 21 -0.01 24 -0.01 20 -0.03 23 -0.02 Fish transfer factor for Ra 30 -0.01 32 -0.01 36 -0.01 36 -0.01 Fish transfer factor for Th 19 -0.01 23 -0.01 33 -0.01 33 -0.01 Co-60 Results:

RESRAD Regression and Correlation output 10/27/23 13:07 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Co60 Input File : BFM-IU_CO60.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.76 1 -0.76 1 -1.00 1 -1.00 Density of contaminated zone 6 0.03 5 0.07 13 -0.01 9 0.00 Contaminated zone total porosity 5 0.03 4 0.07 11 -0.02 7 0.00

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 32 of 38 Contaminated zone b parameter 15 0.01 15 0.01 10 0.02 12 0.00 Evapotranspiration coefficient 10 0.02 10 0.02 18 0.00 18 0.00 Irrigation 18 0.01 19 0.00 15 -0.01 16 0.00 Density of saturated zone 2 -0.05 2 -0.11 6 -0.05 4 -0.01 Saturated zone total porosity 4 -0.05 3 -0.11 7 -0.04 5 -0.01 Saturated zone hydraulic gradient 9 0.02 9 0.02 4 -0.08 6 -0.01 Density of Unsaturated zone 1 22 0.00 21 0.00 22 0.00 22 0.00 Total Porosity of Unsaturated zone 1 20 0.00 18 0.00 16 -0.01 13 0.00 b Parameter of Unsaturated zone 1 17 0.01 17 0.01 17 -0.01 17 0.00 Mass loading for inhalation 12 -0.02 11 -0.02 12 -0.01 14 0.00 Indoor dust filtration factor 8 -0.03 8 -0.02 14 -0.01 15 0.00 External gamma shielding factor 11 0.02 12 0.02 3 0.26 3 0.02 Soil ingestion 21 0.00 22 0.00 8 0.02 10 0.00 Aquatic food 7 0.03 7 0.02 20 0.00 20 0.00 Depth of soil mixing layer 3 0.05 6 0.03 5 -0.05 8 0.00 Kd of Co-60 in Contaminated Zone 13 -0.01 13 -0.01 2 0.42 2 0.03 Kd of Co-60 in Unsaturated Zone 1 19 -0.01 20 0.00 19 0.00 19 0.00 Kd of Co-60 in Saturated Zone 16 0.01 16 0.01 21 0.00 21 0.00 Fish transfer factor for Co 14 -0.01 14 -0.01 9 0.02 11 0.00 Cs-137 Results:

RESRAD Regression and Correlation output 10/27/23 13:13 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Cs137 Input File : BFM-IU_CS137.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.69 1 -0.69 1 -1.00 1 -1.00 Density of contaminated zone 7 0.03 5 0.07 12 -0.02 10 0.00 Contaminated zone total porosity 5 0.03 4 0.07 10 -0.03 6 0.00 Contaminated zone b parameter 17 0.01 19 0.01 13 0.01 14 0.00 Evapotranspiration coefficient 11 0.02 12 0.02 6 -0.05 9 0.00 Irrigation 21 0.00 21 0.00 17 0.01 18 0.00 Density of saturated zone 3 -0.05 2 -0.12 8 -0.03 4 0.00 Saturated zone total porosity 4 -0.05 3 -0.11 9 -0.03 5 0.00 Saturated zone hydraulic gradient 10 0.02 11 0.02 4 -0.06 7 0.00 Density of Unsaturated zone 1 20 0.01 13 0.01 21 0.00 16 0.00 Total Porosity of Unsaturated zone 1 19 0.01 10 0.02 15 -0.01 13 0.00 b Parameter of Unsaturated zone 1 12 0.02 14 0.01 19 0.01 20 0.00 Mass loading for inhalation 9 -0.03 9 -0.02 14 0.01 15 0.00 Indoor dust filtration factor 8 -0.03 8 -0.02 11 0.02 12 0.00 External gamma shielding factor 15 0.01 17 0.01 2 0.80 2 0.02 Soil ingestion 22 0.00 22 0.00 16 0.01 17 0.00 Aquatic food 6 0.03 7 0.02 7 0.03 11 0.00 Depth of soil mixing layer 2 0.05 6 0.04 5 -0.05 8 0.00 Kd of Cs-137 in Contaminated Zone 14 -0.01 16 -0.01 3 0.23 3 0.00 Kd of Cs-137 in Unsaturated Zone 1 18 0.01 20 0.01 22 0.00 22 0.00 Kd of Cs-137 in Saturated Zone 13 0.02 15 0.01 20 0.00 21 0.00 Fish transfer factor for Cs 16 -0.01 18 -0.01 18 -0.01 19 0.00 Eu-152 Results:

RESRAD Regression and Correlation output 10/27/23 13:23 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Eu152 Input File : BFM-IU_EU152.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.73 1 -0.73 1 -0.99 1 -0.99 Density of contaminated zone 24 0.00 19 0.01 7 0.04 4 0.01 Contaminated zone total porosity 21 -0.01 13 -0.01 17 0.01 10 0.00 Contaminated zone b parameter 11 0.02 12 0.02 16 -0.02 19 0.00 Evapotranspiration coefficient 14 -0.02 15 -0.01 8 -0.04 11 0.00 Irrigation 13 -0.02 14 -0.01 11 0.03 12 0.00 Density of saturated zone 2 0.06 2 0.14 24 0.01 18 0.00 Saturated zone total porosity 3 0.06 3 0.12 22 -0.01 15 0.00 Saturated zone hydraulic gradient 19 -0.01 22 -0.01 4 -0.07 7 -0.01 Density of Unsaturated zone 1 12 -0.02 4 -0.04 10 -0.04 6 -0.01 Total Porosity of Unsaturated zone 1 23 0.00 18 -0.01 9 -0.04 5 -0.01 b Parameter of Unsaturated zone 1 8 -0.03 9 -0.02 21 -0.01 23 0.00 Mass loading for inhalation 5 0.04 6 0.02 18 0.01 20 0.00 Indoor dust filtration factor 20 0.01 23 0.00 20 0.01 22 0.00 External gamma shielding factor 4 0.05 5 0.03 3 0.19 3 0.02 Soil ingestion 22 0.00 24 0.00 15 0.02 17 0.00 Aquatic food 17 0.01 20 0.01 6 -0.05 9 0.00 Depth of soil mixing layer 6 -0.03 7 -0.02 26 0.00 26 0.00 Kd of Eu-152 in Contaminated Zone 9 0.03 10 0.02 2 0.42 2 0.05 Kd of Eu-152 in Unsaturated Zone 1 18 -0.01 21 -0.01 19 0.01 21 0.00 Kd of Eu-152 in Saturated Zone 26 0.00 26 0.00 23 -0.01 24 0.00 Fish transfer factor for Eu 16 -0.01 17 -0.01 14 -0.02 16 0.00 Kd of Gd-152 in Contaminated Zone 15 -0.01 16 -0.01 5 -0.06 8 -0.01 Kd of Gd-152 in Unsaturated Zone 1 10 0.02 11 0.02 25 0.01 25 0.00 Kd of Gd-152 in Saturated Zone 25 0.00 25 0.00 13 0.02 14 0.00 Fish transfer factor for Gd 7 0.03 8 0.02 12 -0.03 13 0.00

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 33 of 38 Eu-154 Results:

RESRAD Regression and Correlation output 10/27/23 13:28 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Eu154 Input File : BFM-IU_EU154.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.74 1 -0.74 1 -0.99 1 -0.99 Density of contaminated zone 6 0.03 5 0.07 9 0.04 6 0.01 Contaminated zone total porosity 5 0.03 4 0.07 10 0.04 7 0.01 Contaminated zone b parameter 13 0.02 14 0.01 20 0.00 20 0.00 Evapotranspiration coefficient 10 0.03 10 0.02 18 0.01 18 0.00 Irrigation 19 0.01 20 0.00 19 -0.01 19 0.00 Density of saturated zone 3 -0.05 2 -0.11 5 0.04 4 0.01 Saturated zone total porosity 4 -0.05 3 -0.10 7 0.04 5 0.01 Saturated zone hydraulic gradient 11 0.02 12 0.01 4 -0.06 8 -0.01 Density of Unsaturated zone 1 20 0.00 16 0.01 16 -0.01 11 0.00 Total Porosity of Unsaturated zone 1 17 0.01 11 0.02 17 -0.01 12 0.00 b Parameter of Unsaturated zone 1 14 0.01 15 0.01 12 0.02 14 0.00 Mass loading for inhalation 9 -0.03 9 -0.02 22 0.00 22 0.00 Indoor dust filtration factor 7 -0.03 7 -0.02 15 0.01 17 0.00 External gamma shielding factor 12 0.02 13 0.01 3 0.16 3 0.02 Soil ingestion 21 0.00 21 0.00 21 0.00 21 0.00 Aquatic food 8 0.03 8 0.02 14 -0.01 16 0.00 Depth of soil mixing layer 2 0.05 6 0.03 8 -0.04 10 0.00 Fish transfer factor for Eu 15 -0.01 17 -0.01 13 0.02 15 0.00 Kd of Eu-154 in Contaminated Zone 16 -0.01 18 -0.01 2 0.40 2 0.05 Kd of Eu-154 in Unsaturated Zone 1 22 0.00 22 0.00 11 0.03 13 0.00 Kd of Eu-154 in Saturated Zone 18 -0.01 19 0.00 6 0.04 9 0.00 Fe-55 Results:

RESRAD Regression and Correlation output 10/27/23 13:33 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Fe55 Input File : BFM-IU_FE55.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 0 0.00 0 0.00 0 0.00 0 0.00 Density of contaminated zone 0 0.00 0 0.00 0 0.00 0 0.00 Contaminated zone total porosity 0 0.00 0 0.00 0 0.00 0 0.00 Contaminated zone b parameter 0 0.00 0 0.00 0 0.00 0 0.00 Evapotranspiration coefficient 0 0.00 0 0.00 0 0.00 0 0.00 Irrigation 0 0.00 0 0.00 0 0.00 0 0.00 Density of saturated zone 0 0.00 0 0.00 0 0.00 0 0.00 Saturated zone total porosity 0 0.00 0 0.00 0 0.00 0 0.00 Saturated zone hydraulic gradient 0 0.00 0 0.00 0 0.00 0 0.00 Density of Unsaturated zone 1 0 0.00 0 0.00 0 0.00 0 0.00 Total Porosity of Unsaturated zone 1 0 0.00 0 0.00 0 0.00 0 0.00 b Parameter of Unsaturated zone 1 0 0.00 0 0.00 0 0.00 0 0.00 Mass loading for inhalation 0 0.00 0 0.00 0 0.00 0 0.00 Indoor dust filtration factor 0 0.00 0 0.00 0 0.00 0 0.00 External gamma shielding factor 0 0.00 0 0.00 0 0.00 0 0.00 Soil ingestion 0 0.00 0 0.00 0 0.00 0 0.00 Aquatic food 0 0.00 0 0.00 0 0.00 0 0.00 Depth of soil mixing layer 0 0.00 0 0.00 0 0.00 0 0.00 Kd of Fe-55 in Contaminated Zone 0 0.00 0 0.00 0 0.00 0 0.00 Kd of Fe-55 in Unsaturated Zone 1 0 0.00 0 0.00 0 0.00 0 0.00 Kd of Fe-55 in Saturated Zone 0 0.00 0 0.00 0 0.00 0 0.00 Fish transfer factor for Fe 0 0.00 0 0.00 0 0.00 0 0.00 H-3 Results:

RESRAD Regression and Correlation output 10/27/23 13:38 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_H3 Input File : BFM-IU_H3.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 22 0.01 22 0.00 14 0.02 15 0.02 Density of contaminated zone 8 0.06 5 0.11 6 0.05 3 0.11 Contaminated zone total porosity 12 -0.03 8 -0.06 16 -0.01 10 -0.03 Contaminated zone b parameter 9 -0.04 14 -0.02 13 -0.02 14 -0.02 Evapotranspiration coefficient 5 -0.08 9 -0.05 5 -0.11 7 -0.07 Irrigation 21 -0.01 21 -0.01 18 0.01 19 0.00 Density of saturated zone 11 -0.03 7 -0.07 11 -0.03 8 -0.06 Saturated zone total porosity 10 -0.03 6 -0.07 12 -0.03 9 -0.06 Saturated zone hydraulic gradient 2 -0.52 2 -0.39 2 -0.47 2 -0.36 Density of Unsaturated zone 1 16 -0.02 13 -0.04 7 -0.04 6 -0.07 Total Porosity of Unsaturated zone 1 15 0.02 12 0.04 20 0.00 17 0.01 b Parameter of Unsaturated zone 1 19 -0.01 19 -0.01 19 0.00 20 0.00 Mass loading for inhalation 20 0.01 20 0.01 22 0.00 22 0.00 Indoor dust filtration factor 13 -0.03 15 -0.02 15 -0.01 16 -0.01 External gamma shielding factor 14 0.02 16 0.01 21 0.00 21 0.00 Soil ingestion 18 -0.02 18 -0.01 17 -0.01 18 -0.01 Aquatic food 1 0.69 1 0.61 1 0.66 1 0.60 Depth of soil mixing layer 6 -0.06 10 -0.04 10 -0.03 13 -0.02 Kd of H-3 in Contaminated Zone 7 -0.06 11 -0.04 8 -0.03 11 -0.02 Kd of H-3 in Unsaturated Zone 1 3 -0.22 3 -0.14 4 -0.15 5 -0.10

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 34 of 38 Kd of H-3 in Saturated Zone 17 0.02 17 0.01 9 0.03 12 0.02 Fish transfer factor for H 4 0.18 4 0.12 3 0.15 4 0.10 Mn-54 Results:

RESRAD Regression and Correlation output 10/27/23 13:44 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Mn54 Input File : BFM-IU_MN54.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.72 1 -0.72 1 -1.00 1 -1.00 Density of contaminated zone 7 0.03 5 0.07 13 -0.01 9 0.00 Contaminated zone total porosity 5 0.03 4 0.07 10 -0.02 6 0.00 Contaminated zone b parameter 16 0.01 18 0.01 20 0.00 20 0.00 Evapotranspiration coefficient 11 0.02 11 0.02 9 -0.02 11 0.00 Irrigation 19 0.00 20 0.00 11 -0.02 13 0.00 Density of saturated zone 3 -0.05 2 -0.11 6 -0.04 4 0.00 Saturated zone total porosity 4 -0.05 3 -0.11 7 -0.03 5 0.00 Saturated zone hydraulic gradient 10 0.03 10 0.02 5 -0.05 8 0.00 Density of Unsaturated zone 1 20 0.00 15 0.01 18 0.00 14 0.00 Total Porosity of Unsaturated zone 1 18 0.01 12 0.02 16 -0.01 12 0.00 b Parameter of Unsaturated zone 1 15 0.01 17 0.01 19 0.00 19 0.00 Mass loading for inhalation 9 -0.03 9 -0.02 21 0.00 21 0.00 Indoor dust filtration factor 8 -0.03 8 -0.02 14 0.01 16 0.00 External gamma shielding factor 13 0.02 14 0.01 2 0.58 2 0.02 Soil ingestion 22 0.00 22 0.00 12 0.01 15 0.00 Aquatic food 6 0.03 7 0.02 17 0.00 18 0.00 Depth of soil mixing layer 2 0.05 6 0.04 4 -0.05 7 0.00 Kd of Mn-54 in Contaminated Zone 12 -0.02 13 -0.01 3 0.28 3 0.01 Kd of Mn-54 in Unsaturated Zone 1 21 0.00 21 0.00 15 0.01 17 0.00 Kd of Mn-54 in Saturated Zone 17 0.01 19 0.01 22 0.00 22 0.00 Fish transfer factor for Mn 14 -0.01 16 -0.01 8 0.02 10 0.00 Nb-94 Results:

RESRAD Regression and Correlation output 10/27/23 09:57 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Nb94 Input File : BFM-IU_NB94.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.62 1 -0.56 2 -0.83 2 -0.51 Density of contaminated zone 5 0.04 4 0.10 5 0.07 4 0.08 Contaminated zone total porosity 13 0.01 8 0.03 15 0.02 11 0.02 Contaminated zone b parameter 11 0.02 14 0.01 22 0.00 22 0.00 Evapotranspiration coefficient 12 -0.02 15 -0.01 12 -0.03 13 -0.01 Irrigation 22 0.00 22 0.00 16 0.01 16 0.00 Density of saturated zone 6 -0.04 5 -0.08 6 -0.06 5 -0.06 Saturated zone total porosity 7 -0.03 6 -0.08 7 -0.05 6 -0.05 Saturated zone hydraulic gradient 3 -0.24 3 -0.17 3 -0.49 3 -0.19 Density of Unsaturated zone 1 14 0.01 9 0.03 9 0.03 7 0.04 Total Porosity of Unsaturated zone 1 18 0.01 13 0.02 10 0.03 9 0.03 b Parameter of Unsaturated zone 1 16 0.01 17 0.01 19 0.01 19 0.00 Mass loading for inhalation 8 0.03 10 0.02 20 -0.01 20 0.00 Indoor dust filtration factor 19 -0.01 19 0.00 21 0.00 21 0.00 External gamma shielding factor 4 0.06 7 0.05 4 0.09 8 0.03 Soil ingestion 17 -0.01 18 -0.01 17 -0.01 17 0.00 Aquatic food 9 0.02 11 0.02 18 0.01 18 0.00 Depth of soil mixing layer 15 0.01 16 0.01 14 -0.02 15 -0.01 Kd of Nb-94 in Contaminated Zone 2 0.48 2 0.38 1 0.91 1 0.76 Kd of Nb-94 in Unsaturated Zone 1 10 -0.02 12 -0.02 11 -0.03 12 -0.01 Kd of Nb-94 in Saturated Zone 21 -0.01 21 0.00 8 -0.05 10 -0.02 Fish transfer factor for Nb 20 0.01 20 0.00 13 -0.02 14 -0.01 Ni-63 Results:

RESRAD Regression and Correlation output 10/27/23 10:03 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Ni63 Input File : BFM-IU_NI63.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 7 0.02 11 0.02 11 0.03 12 0.02 Density of contaminated zone 12 0.01 5 0.04 7 -0.04 4 -0.12 Contaminated zone total porosity 22 0.00 22 0.00 4 -0.05 2 -0.13 Contaminated zone b parameter 5 -0.03 9 -0.03 13 -0.02 14 -0.02 Evapotranspiration coefficient 2 -0.04 6 -0.04 2 -0.06 7 -0.06 Irrigation 19 -0.01 20 -0.01 21 0.00 21 0.00 Density of saturated zone 20 0.00 19 -0.01 5 -0.05 3 -0.13 Saturated zone total porosity 9 0.02 1 0.05 10 -0.03 6 -0.08 Saturated zone hydraulic gradient 21 0.00 21 0.00 18 0.01 18 0.01 Density of Unsaturated zone 1 11 0.01 3 0.05 16 0.01 9 0.04 Total Porosity of Unsaturated zone 1 10 0.02 2 0.05 9 0.03 5 0.09 b Parameter of Unsaturated zone 1 14 0.01 14 0.01 22 0.00 22 0.00 Mass loading for inhalation 18 -0.01 18 -0.01 20 -0.01 20 -0.01 Indoor dust filtration factor 15 0.01 15 0.01 14 -0.02 15 -0.02 External gamma shielding factor 16 0.01 16 0.01 17 0.01 17 0.01 Soil ingestion 4 0.03 8 0.03 19 -0.01 19 -0.01

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 35 of 38 Aquatic food 1 0.04 4 0.04 15 0.02 16 0.02 Depth of soil mixing layer 13 0.01 13 0.01 8 0.03 11 0.03 Kd of Ni-63 in Contaminated Zone 6 -0.02 10 -0.02 12 -0.02 13 -0.02 Kd of Ni-63 in Unsaturated Zone 1 3 -0.03 7 -0.03 1 -0.41 1 -0.40 Kd of Ni-63 in Saturated Zone 8 -0.02 12 -0.02 3 -0.06 8 -0.05 Fish transfer factor for Ni 17 -0.01 17 -0.01 6 -0.04 10 -0.04 Np-237 Results:

RESRAD Regression and Correlation output 10/27/23 10:18 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Np237 Input File : BFM-IU_NP237.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 24 0.01 24 0.01 3 -0.27 3 -0.18 Density of contaminated zone 19 -0.01 9 -0.03 15 0.02 9 0.04 Contaminated zone total porosity 27 0.00 25 0.00 29 0.00 26 0.01 Contaminated zone b parameter 9 0.02 13 0.02 18 -0.01 19 -0.01 Evapotranspiration coefficient 5 -0.04 7 -0.03 5 -0.12 6 -0.07 Irrigation 17 0.01 19 0.01 13 0.03 16 0.02 Density of saturated zone 22 0.01 12 0.02 16 0.02 11 0.04 Saturated zone total porosity 29 0.00 27 0.00 25 0.01 15 0.02 Saturated zone hydraulic gradient 14 -0.01 17 -0.01 4 -0.17 4 -0.11 Density of Unsaturated zone 1 13 0.01 5 0.04 30 0.00 27 0.01 Total Porosity of Unsaturated zone 1 15 0.01 6 0.03 9 0.05 5 0.10 b Parameter of Unsaturated zone 1 16 0.01 18 0.01 11 0.04 13 0.02 Mass loading for inhalation 28 0.00 29 0.00 27 -0.01 29 0.00 Indoor dust filtration factor 12 0.02 16 0.01 12 0.04 14 0.02 External gamma shielding factor 6 -0.03 8 -0.03 28 0.01 30 0.00 Soil ingestion 23 -0.01 23 -0.01 24 0.01 25 0.01 Aquatic food 2 0.08 2 0.06 6 0.10 7 0.06 Depth of soil mixing layer 26 0.00 28 0.00 20 0.01 21 0.01 Kd of Np-237 in Contaminated Zone 18 -0.01 20 -0.01 2 0.57 2 0.44 Kd of Np-237 in Unsaturated Zone 1 3 -0.06 3 -0.05 1 -0.67 1 -0.57 Kd of Np-237 in Saturated Zone 21 -0.01 22 -0.01 22 0.01 23 0.01 Kd of Th-229 in Contaminated Zone 25 0.00 26 0.00 21 0.01 22 0.01 Kd of Th-229 in Unsaturated Zone 1 7 0.03 10 0.02 17 -0.02 18 -0.01 Kd of Th-229 in Saturated Zone 11 -0.02 15 -0.01 19 -0.01 20 -0.01 Kd of U-233 in Contaminated Zone 10 -0.02 14 -0.01 8 -0.07 10 -0.04 Kd of U-233 in Unsaturated Zone 1 8 -0.03 11 -0.02 7 -0.09 8 -0.06 Kd of U-233 in Saturated Zone 30 0.00 30 0.00 26 -0.01 28 0.00 Fish transfer factor for Np 1 0.64 1 0.63 10 0.04 12 0.03 Fish transfer factor for Th 20 0.01 21 0.01 23 0.01 24 0.01 Fish transfer factor for U 4 0.05 4 0.04 14 0.02 17 0.02 Pu-238 Results:

RESRAD Regression and Correlation output 10/29/23 12:06 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Pu238 Input File : BFM-IU_PU238.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 39 0.00 39 0.00 2 -0.52 2 -0.44 Density of contaminated zone 12 0.02 5 0.06 8 0.05 4 0.12 Contaminated zone total porosity 18 0.01 10 0.04 13 0.04 5 0.09 Contaminated zone b parameter 16 -0.01 17 -0.01 34 -0.01 36 -0.01 Evapotranspiration coefficient 6 -0.03 12 -0.03 6 -0.10 8 -0.07 Irrigation 29 0.00 29 0.00 41 0.00 41 0.00 Density of saturated zone 9 -0.03 3 -0.10 27 -0.01 15 -0.03 Saturated zone total porosity 7 -0.03 1 -0.11 36 -0.01 20 -0.02 Saturated zone hydraulic gradient 5 -0.04 11 -0.04 7 -0.09 9 -0.06 Density of Unsaturated zone 1 8 -0.03 2 -0.10 39 0.01 23 0.02 Total Porosity of Unsaturated zone 1 11 -0.03 4 -0.09 20 0.02 10 0.05 b Parameter of Unsaturated zone 1 1 0.05 6 0.05 37 -0.01 38 -0.01 Mass loading for inhalation 19 0.01 19 0.01 31 0.01 33 0.01 Indoor dust filtration factor 17 -0.01 18 -0.01 33 -0.01 35 -0.01 External gamma shielding factor 3 0.04 8 0.04 23 -0.02 26 -0.01 Soil ingestion 4 -0.04 9 -0.04 21 -0.02 24 -0.02 Aquatic food 2 0.04 7 0.04 26 0.02 29 0.01 Depth of soil mixing layer 10 -0.03 13 -0.03 9 -0.05 11 -0.04 Fish transfer factor for Th 20 -0.01 20 -0.01 42 0.00 42 0.00 Fish transfer factor for U 42 0.00 42 0.00 10 0.05 12 0.04 Kd of Pu-238 in Contaminated Zone 14 -0.02 15 -0.02 12 0.04 14 0.03 Kd of Pu-238 in Unsaturated Zone 1 15 -0.02 16 -0.02 19 -0.03 22 -0.02 Kd of Pu-238 in Saturated Zone 27 0.01 27 0.01 15 0.03 17 0.02 Kd of Pb-210 in Contaminated Zone 31 0.00 31 0.00 29 -0.01 31 -0.01 Kd of Pb-210 in Unsaturated Zone 1 40 0.00 40 0.00 14 -0.04 16 -0.03 Kd of Pb-210 in Saturated Zone 25 -0.01 25 -0.01 40 -0.01 40 0.00 Kd of Po-210 in Contaminated Zone 22 -0.01 22 -0.01 32 -0.01 34 -0.01 Kd of Po-210 in Unsaturated Zone 1 23 -0.01 23 -0.01 17 -0.03 19 -0.02 Kd of Po-210 in Saturated Zone 24 -0.01 24 -0.01 18 0.03 21 0.02 Kd of Ra-226 in Contaminated Zone 34 0.00 34 0.00 24 0.02 27 0.01 Kd of Ra-226 in Unsaturated Zone 1 21 -0.01 21 -0.01 28 0.01 30 0.01 Kd of Ra-226 in Saturated Zone 35 0.00 35 0.00 22 0.02 25 0.02 Kd of Th-230 in Contaminated Zone 30 0.00 30 0.00 4 0.12 7 0.08 Kd of Th-230 in Unsaturated Zone 1 33 0.00 33 0.00 5 -0.12 6 -0.08 Kd of Th-230 in Saturated Zone 36 0.00 36 0.00 16 -0.03 18 -0.02 Kd of U-234 in Contaminated Zone 38 0.00 38 0.00 3 0.31 3 0.23 Kd of U-234 in Unsaturated Zone 1 41 0.00 41 0.00 1 -0.53 1 -0.45 Kd of U-234 in Saturated Zone 32 0.00 32 0.00 35 0.01 37 0.01 Fish transfer factor for Pb 28 -0.01 28 -0.01 25 0.02 28 0.01 Fish transfer factor for Po 26 0.01 26 0.01 30 0.01 32 0.01 Fish transfer factor for Pu 37 0.00 37 0.00 11 -0.05 13 -0.04

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 36 of 38 Fish transfer factor for Ra 13 0.02 14 0.02 38 -0.01 39 -0.01 Pu-239 Results:

RESRAD Regression and Correlation output 10/27/23 11:06 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Pu239 Input File : BFM-IU_PU239.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 29 0.00 29 0.00 5 -0.15 5 -0.10 Density of contaminated zone 5 -0.03 2 -0.10 12 0.04 6 0.08 Contaminated zone total porosity 9 -0.03 3 -0.08 14 0.03 7 0.07 Contaminated zone b parameter 8 0.03 13 0.03 33 0.00 33 0.00 Evapotranspiration coefficient 12 -0.02 16 -0.02 8 -0.07 10 -0.05 Irrigation 18 -0.01 20 -0.01 25 0.01 25 0.01 Density of saturated zone 13 -0.02 4 -0.06 22 -0.01 17 -0.03 Saturated zone total porosity 19 -0.01 8 -0.04 16 -0.02 11 -0.05 Saturated zone hydraulic gradient 3 -0.06 6 -0.05 4 -0.20 4 -0.13 Density of Unsaturated zone 1 20 0.01 9 0.03 21 -0.02 16 -0.03 Total Porosity of Unsaturated zone 1 15 0.02 7 0.05 18 0.02 14 0.04 b Parameter of Unsaturated zone 1 4 0.03 10 0.03 27 -0.01 27 0.00 Mass loading for inhalation 11 -0.02 15 -0.02 17 0.02 20 0.01 Indoor dust filtration factor 10 -0.03 14 -0.02 13 -0.04 18 -0.03 External gamma shielding factor 14 -0.02 17 -0.02 10 0.05 13 0.04 Soil ingestion 30 0.00 30 0.00 11 0.05 15 0.04 Aquatic food 2 0.06 5 0.06 6 0.08 8 0.05 Depth of soil mixing layer 23 -0.01 23 -0.01 3 0.45 3 0.34 Fish transfer factor for U 28 0.00 28 0.00 24 -0.01 24 -0.01 Kd of Pu-239 in Contaminated Zone 7 -0.03 12 -0.03 2 0.55 2 0.44 Kd of Pu-239 in Unsaturated Zone 1 6 -0.03 11 -0.03 1 -0.57 1 -0.46 Kd of Pu-239 in Saturated Zone 22 -0.01 22 -0.01 23 -0.01 23 -0.01 Kd of Ac-227 in Contaminated Zone 26 0.00 26 0.00 28 0.00 28 0.00 Kd of Ac-227 in Unsaturated Zone 1 21 0.01 21 0.01 19 0.02 21 0.01 Kd of Ac-227 in Saturated Zone 25 -0.01 25 -0.01 9 -0.06 12 -0.04 Kd of Pa-231 in Contaminated Zone 32 0.00 32 0.00 30 0.00 30 0.00 Kd of Pa-231 in Unsaturated Zone 1 24 -0.01 24 -0.01 32 0.00 32 0.00 Kd of Pa-231 in Saturated Zone 16 -0.01 18 -0.01 26 0.01 26 0.01 Kd of U-235 in Contaminated Zone 31 0.00 31 0.00 20 -0.02 22 -0.01 Kd of U-235 in Unsaturated Zone 1 27 0.00 27 0.00 15 -0.03 19 -0.02 Kd of U-235 in Saturated Zone 34 0.00 34 0.00 29 0.00 29 0.00 Fish transfer factor for Pu 1 0.23 1 0.23 7 0.07 9 0.05 Fish transfer factor for Ac 17 -0.01 19 -0.01 34 0.00 34 0.00 Fish transfer factor for Pa 33 0.00 33 0.00 31 0.00 31 0.00 Pu-240 Results:

RESRAD Regression and Correlation output 10/27/23 13:02 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Pu240 Input File : BFM-IU_PU240.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 10 0.03 12 0.03 3 -0.26 3 -0.21 Density of contaminated zone 19 -0.02 6 -0.06 34 0.00 32 -0.01 Contaminated zone total porosity 20 -0.02 8 -0.06 35 0.00 33 -0.01 Contaminated zone b parameter 9 -0.03 11 -0.03 29 0.01 30 0.01 Evapotranspiration coefficient 34 0.00 34 0.00 9 -0.10 9 -0.07 Irrigation 26 -0.01 28 -0.01 14 0.02 17 0.02 Density of saturated zone 5 0.06 2 0.19 30 0.01 14 0.03 Saturated zone total porosity 6 0.06 3 0.17 13 0.02 10 0.05 Saturated zone hydraulic gradient 8 -0.04 10 -0.04 6 -0.15 6 -0.11 Density of Unsaturated zone 1 30 -0.01 22 -0.02 18 -0.02 11 -0.05 Total Porosity of Unsaturated zone 1 29 0.01 21 0.02 25 0.02 12 0.04 b Parameter of Unsaturated zone 1 18 0.02 20 0.02 37 0.00 37 0.00 Mass loading for inhalation 23 0.02 26 0.02 31 -0.01 31 -0.01 Indoor dust filtration factor 15 0.03 17 0.03 21 0.02 23 0.01 External gamma shielding factor 14 -0.03 16 -0.03 15 0.02 18 0.02 Soil ingestion 11 -0.03 13 -0.03 26 -0.01 27 -0.01 Aquatic food 3 0.07 5 0.07 8 0.12 8 0.09 Depth of soil mixing layer 21 -0.02 23 -0.02 5 0.21 5 0.16 Fish transfer factor for Th 13 0.03 15 0.03 12 -0.03 16 -0.02 Fish transfer factor for U 37 0.00 37 0.00 7 0.12 7 0.09 Kd of Pu-240 in Contaminated Zone 4 -0.06 7 -0.06 4 0.23 4 0.18 Kd of Pu-240 in Unsaturated Zone 1 2 -0.08 4 -0.08 1 -0.49 1 -0.43 Kd of Pu-240 in Saturated Zone 16 -0.02 18 -0.02 27 -0.01 28 -0.01 Kd of Ra-228 in Contaminated Zone 32 0.01 32 0.01 22 0.02 24 0.01 Kd of Ra-228 in Unsaturated Zone 1 24 -0.02 25 -0.02 17 0.02 20 0.02 Kd of Ra-228 in Saturated Zone 25 -0.01 27 -0.01 16 -0.02 19 -0.02 Kd of Th-228 in Contaminated Zone 27 0.01 29 0.01 32 -0.01 34 -0.01 Kd of Th-228 in Unsaturated Zone 1 17 -0.02 19 -0.02 36 0.00 36 0.00 Kd of Th-228 in Saturated Zone 31 0.01 31 0.01 28 0.01 29 0.01 Kd of Th-232 in Contaminated Zone 33 -0.01 33 0.00 24 0.02 26 0.01 Kd of Th-232 in Unsaturated Zone 1 12 0.03 14 0.03 10 0.04 13 0.03 Kd of Th-232 in Saturated Zone 7 0.04 9 0.04 20 -0.02 22 -0.02 Kd of U-236 in Contaminated Zone 35 0.00 35 0.00 19 -0.02 21 -0.02 Kd of U-236 in Unsaturated Zone 1 28 -0.01 30 -0.01 2 -0.39 2 -0.32 Kd of U-236 in Saturated Zone 22 -0.02 24 -0.02 11 -0.03 15 -0.02 Fish transfer factor for Pu 1 0.22 1 0.21 33 0.01 35 0.00 Fish transfer factor for Ra 36 0.00 36 0.00 23 0.02 25 0.01

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 37 of 38 Pu-241 Results:

RESRAD Regression and Correlation output 10/27/23 14:45 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Pu241 Input File : BFM-IU_PU241.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Kd of Am-241 in Contaminated Zone 3 0.12 4 0.10 3 0.32 3 0.23 Kd of Am-241 in Unsaturated Zone 1 13 -0.03 15 -0.02 2 -0.33 2 -0.24 Kd of Am-241 in Saturated Zone 10 0.03 11 0.03 31 -0.01 35 -0.01 Kd of Np-237 in Contaminated Zone 29 -0.01 31 -0.01 7 0.15 7 0.10 Kd of Np-237 in Unsaturated Zone 1 31 -0.01 33 -0.01 33 0.01 36 0.01 Kd of Np-237 in Saturated Zone 21 0.02 23 0.01 24 0.01 28 0.01 Kd of Th-229 in Contaminated Zone 20 -0.02 22 -0.01 28 0.01 31 0.01 Kd of Th-229 in Unsaturated Zone 1 28 -0.01 30 -0.01 23 -0.01 27 -0.01 Kd of Th-229 in Saturated Zone 6 0.04 7 0.03 12 -0.03 14 -0.02 Kd of U-233 in Contaminated Zone 25 -0.01 27 -0.01 15 -0.02 19 -0.01 Kd of U-233 in Unsaturated Zone 1 33 0.00 35 0.00 22 0.02 26 0.01 Kd of U-233 in Saturated Zone 23 -0.01 25 -0.01 18 -0.02 22 -0.01 Density of cover material 17 0.02 19 0.02 8 -0.10 8 -0.07 Density of contaminated zone 36 0.00 29 -0.01 34 0.01 18 0.02 Contaminated zone total porosity 35 0.00 28 -0.01 19 -0.02 10 -0.04 Contaminated zone b parameter 9 -0.03 10 -0.03 20 -0.02 23 -0.01 Evapotranspiration coefficient 32 0.01 34 0.00 9 -0.08 9 -0.06 Irrigation 24 -0.01 26 -0.01 25 -0.01 29 -0.01 Density of saturated zone 27 0.01 14 0.02 35 -0.01 25 -0.01 Saturated zone total porosity 26 0.01 12 0.02 38 0.00 32 -0.01 Saturated zone hydraulic gradient 4 -0.05 6 -0.04 4 -0.21 4 -0.15 Density of Unsaturated zone 1 12 0.03 5 0.07 32 -0.01 16 -0.02 Total Porosity of Unsaturated zone 1 5 0.04 3 0.10 26 0.01 11 0.03 b Parameter of Unsaturated zone 1 18 -0.02 20 -0.02 37 0.00 38 0.00 Mass loading for inhalation 16 0.02 18 0.02 36 -0.01 37 0.00 Indoor dust filtration factor 30 0.01 32 0.01 30 -0.01 34 -0.01 External gamma shielding factor 14 -0.02 16 -0.02 17 -0.02 21 -0.01 Soil ingestion 2 0.17 2 0.14 10 0.04 12 0.03 Aquatic food 8 0.04 9 0.03 6 0.18 6 0.13 Depth of soil mixing layer 1 0.60 1 0.59 1 0.64 1 0.57 Fish transfer factor for Am 22 0.02 24 0.01 14 0.02 17 0.02 Fish transfer factor for Np 37 0.00 37 0.00 5 0.19 5 0.13 Fish transfer factor for Th 19 0.02 21 0.02 29 0.01 33 0.01 Fish transfer factor for U 11 0.03 13 0.02 27 0.01 30 0.01 Kd of Pu-241 in Contaminated Zone 7 0.04 8 0.03 11 0.03 13 0.02 Kd of Pu-241 in Unsaturated Zone 1 34 0.00 36 0.00 16 -0.02 20 -0.01 Kd of Pu-241 in Saturated Zone 15 0.02 17 0.02 13 0.03 15 0.02 Fish transfer factor for Pu 38 0.00 38 0.00 21 0.02 24 0.01 Sb-125 Results:

RESRAD Regression and Correlation output 10/27/23 10:28 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Sb125 Input File : BFM-IU_SB125.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 1 -0.66 1 -0.66 1 -1.00 1 -1.00 Density of contaminated zone 24 0.00 22 0.01 5 0.06 5 0.01 Contaminated zone total porosity 21 -0.01 12 -0.02 15 0.02 8 0.00 Contaminated zone b parameter 11 0.02 13 0.02 24 0.00 24 0.00 Evapotranspiration coefficient 19 -0.01 20 -0.01 8 -0.04 12 0.00 Irrigation 14 -0.02 16 -0.01 12 0.03 15 0.00 Density of saturated zone 2 0.06 2 0.15 17 0.02 10 0.00 Saturated zone total porosity 3 0.06 3 0.14 20 0.01 13 0.00 Saturated zone hydraulic gradient 18 -0.01 19 -0.01 4 -0.19 4 -0.01 Density of Unsaturated zone 1 15 -0.02 4 -0.04 10 -0.04 7 -0.01 Total Porosity of Unsaturated zone 1 25 0.00 24 0.00 9 -0.04 6 -0.01 b Parameter of Unsaturated zone 1 7 -0.03 8 -0.02 25 0.00 25 0.00 Mass loading for inhalation 6 0.03 7 0.03 21 0.01 21 0.00 Indoor dust filtration factor 22 0.01 23 0.00 18 0.02 19 0.00 External gamma shielding factor 5 0.04 6 0.03 3 0.24 3 0.02 Soil ingestion 26 0.00 26 0.00 16 0.02 18 0.00 Aquatic food 16 0.01 17 0.01 7 -0.05 11 0.00 Depth of soil mixing layer 8 -0.03 9 -0.02 23 0.00 23 0.00 Kd of Sb-125 in Contaminated Zone 4 0.05 5 0.04 2 0.63 2 0.05 Kd of Sb-125 in Unsaturated Zone 1 23 0.00 25 0.00 22 -0.01 22 0.00 Kd of Sb-125 in Saturated Zone 9 0.03 10 0.02 26 0.00 26 0.00 Kd of Te-125m in Contaminated Zone 12 -0.02 14 -0.02 14 -0.02 17 0.00 Kd of Te-125m in Unsaturated Zone 1 17 -0.01 18 -0.01 6 -0.05 9 0.00 Kd of Te-125m in Saturated Zone 13 0.02 15 0.02 19 0.02 20 0.00 Fish transfer factor for Sb 20 -0.01 21 -0.01 11 0.03 14 0.00 Fish transfer factor for Te 10 0.03 11 0.02 13 -0.03 16 0.00 Sr-90 Results:

RESRAD Regression and Correlation output 10/27/23 10:36 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Sr90 Input File : BFM-IU_SR90.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 20 -0.01 20 -0.01 3 -0.55 3 -0.42

BHI Energy ENG-OCS-012 BFM Probabilistic Analysis for IR Scenario: IU Exposure Pathways Rev. 0 Page 38 of 38 Density of contaminated zone 16 -0.02 8 -0.06 11 0.02 9 0.04 Contaminated zone total porosity 10 -0.03 4 -0.08 19 0.00 15 -0.01 Contaminated zone b parameter 15 0.02 16 0.02 15 -0.01 17 -0.01 Evapotranspiration coefficient 22 0.00 22 0.00 5 -0.07 8 -0.05 Irrigation 21 0.01 21 0.01 14 0.01 16 0.01 Density of saturated zone 3 0.05 1 0.17 9 -0.03 7 -0.06 Saturated zone total porosity 4 0.05 2 0.17 16 -0.01 12 -0.02 Saturated zone hydraulic gradient 2 -0.06 7 -0.06 4 -0.15 5 -0.09 Density of Unsaturated zone 1 14 0.02 6 0.07 8 0.04 6 0.07 Total Porosity of Unsaturated zone 1 12 0.02 5 0.07 7 0.05 4 0.10 b Parameter of Unsaturated zone 1 19 -0.01 19 -0.01 20 0.00 20 0.00 Mass loading for inhalation 8 0.03 12 0.03 22 0.00 22 0.00 Indoor dust filtration factor 11 0.03 14 0.02 12 0.02 13 0.01 External gamma shielding factor 6 -0.04 10 -0.04 17 -0.01 18 0.00 Soil ingestion 13 0.02 15 0.02 10 0.03 11 0.02 Aquatic food 18 0.01 18 0.01 18 -0.01 19 0.00 Depth of soil mixing layer 9 0.03 13 0.03 21 0.00 21 0.00 Kd of Sr-90 in Contaminated Zone 7 -0.04 11 -0.04 1 0.59 1 0.46 Kd of Sr-90 in Unsaturated Zone 1 5 -0.04 9 -0.04 2 -0.56 2 -0.43 Kd of Sr-90 in Saturated Zone 17 -0.01 17 -0.01 6 -0.06 10 -0.04 Fish transfer factor for Sr 1 0.12 3 0.12 13 -0.01 14 -0.01 Tc-99 Results:

RESRAD Regression and Correlation output 10/27/23 10:51 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Tc99 Input File : BFM-IU_TC99.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 16 0.01 17 0.01 15 -0.03 16 -0.02 Density of contaminated zone 15 0.02 11 0.03 19 0.01 17 0.01 Contaminated zone total porosity 12 -0.02 8 -0.05 13 -0.03 9 -0.05 Contaminated zone b parameter 22 0.00 22 0.00 17 0.02 18 0.01 Evapotranspiration coefficient 5 -0.11 6 -0.07 4 -0.30 4 -0.19 Irrigation 7 -0.04 12 -0.03 18 -0.01 19 -0.01 Density of saturated zone 10 -0.03 7 -0.06 11 -0.03 8 -0.06 Saturated zone total porosity 13 -0.02 9 -0.05 9 -0.04 7 -0.07 Saturated zone hydraulic gradient 4 -0.18 4 -0.12 5 -0.21 5 -0.13 Density of Unsaturated zone 1 8 -0.04 5 -0.08 16 -0.02 10 -0.04 Total Porosity of Unsaturated zone 1 17 -0.01 14 -0.02 6 0.07 6 0.12 b Parameter of Unsaturated zone 1 11 0.03 15 0.02 10 0.03 13 0.02 Mass loading for inhalation 9 0.04 13 0.02 14 0.03 15 0.02 Indoor dust filtration factor 18 0.01 18 0.01 20 -0.01 20 0.00 External gamma shielding factor 21 0.00 21 0.00 12 -0.03 14 -0.02 Soil ingestion 20 0.00 20 0.00 22 0.00 22 0.00 Aquatic food 2 0.34 2 0.23 3 0.41 3 0.28 Depth of soil mixing layer 19 0.00 19 0.00 7 -0.06 11 -0.03 Kd of Tc-99 in Contaminated Zone 6 -0.05 10 -0.03 8 -0.04 12 -0.02 Kd of Tc-99 in Unsaturated Zone 1 3 -0.28 3 -0.19 2 -0.55 2 -0.40 Kd of Tc-99 in Saturated Zone 14 -0.02 16 -0.01 21 0.00 21 0.00 Fish transfer factor for Tc 1 0.73 1 0.69 1 0.67 1 0.55

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