ML24214A061

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Enclosure 15: ENG-OCS-014 Revision: 0, Basement Fill Model: Probabilistic Analysis for Embedded Pipes Scenario Oyster Creek Station, January 2024
ML24214A061
Person / Time
Site: Oyster Creek
Issue date: 08/01/2024
From: Bisson J
BHI Energy, Holtec Decommissioning International, Westinghouse
To:
Office of Nuclear Reactor Regulation
Shared Package
ML24214A209 List:
References
HDI-OC-24-018 ENG-OCS-014, Rev 0
Download: ML24214A061 (1)
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Text

ENGINEERING CALCULATION Basement Fill Model:

Probabilistic Analysis for Embedded Pipes Scenario Oyster Creek Station ENG-OCS-014 Revision: 0 January 2024 Prepared by:

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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 1 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 embedded pipe (EP) scenario to support development of derived concentration guideline levels (DCGL) for assessing embedded pipes in 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.

Probabilistic analysis is a method to evaluate the uncertainty in input values. A large portion of the uncertainty associated with identified sensitive input parameters is addressed by determining reasonably conservative input values based on the results of RESRAD-Onsite probabilistic analyses. The results of this calculation support the subsequent development of DCGL values for assessing residual radioactive contamination associated with embedded piping in below-grade concrete structures by identifying sensitive RESRAD input parameters and determining reasonably conservative input values for those parameters.

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

3.0 REFERENCES

3.1 ENG-AP-02, Verification of Software Operability 3.2 ANL/EVS/TM-18/1, RESRAD-Onsite 7.2 Users Guide, April 2018 3.3 Radionuclide Selection for DCGL Development-Oyster Creek Station Site Characterization Project, January 2022 3.4 ENG-OCS-012, Basement Fill Model: Probabilistic Analysis for Instantaneous Release Scenario Assuming Industrial Use Exposure Pathways, Rev. 0.

3.5 HOLTEC-00045 CALC-001, Oyster Creek Generating Station Assessment of Subsurface Structures, 4/2023 3.6 Oyster Creek Station Historical Site Assessment, Rev. 2, November 2021 3.7 Hydrogeologic Investigation Report, GHD, January 2017 3.8 NUREG/CR-7267, Default Parameter Values and Distribution in RESRAD-ONSITE V7.2, RESRAD-BUILD V3.5, and RESRAD-OFFSITE V4.0 Computer Codes, 2/2020 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-Onsite 7.2 Users Guide [3.2] was used as a reference for code use.

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

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) is used here to identify sensitive parameters. 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 is a PRCC value with an absolute value greater than 0.25. To address the uncertainties associated with the input parameters identified as

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 2 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 capture a large portion of the uncertainty associated with the sensitive input parameters and are recommended as reasonably conservative input for subsequent DCGL calculations. The approach of assigning 25th and 75th percentile values of a sensitive parameters distribution to address the uncertainty associated with input has been accepted in the past by the U.S. Nuclear Regulatory Commission (NRC) and State regulators as a reasonably conservative approach.

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 [3.3]. Oyster Creek Station (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.

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 EP scenario. The EP scenario assumes an instantaneous release of radioactive contamination on the internal surfaces of embedded pipes to fill material that is within 1m of the concrete floors of the below-grade building foundations targeted to remain onsite at license termination: Reactor Building (RB), Turbine Building (TB),

and Old Radwaste Building (ORB). The contaminated volumes (CV) from the foundations are summed and the summed CV is assumed covered by clean material and located entirely in the saturated zone. The walls and floors of the below-grade structures are assumed not to impede groundwater flow or migration of residual contamination. The configuration of contaminated zone (CZ) created by the CV is shown in Figure 1.

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 3 Figure 1: Conceptual Configuration of CV (note: not to scale) 2.3 The active exposure pathways for the IU scenario are assumed in this calculation. The pathways used to estimate human radiation exposure resulting from residual radioactivity associated with EP are the same as those assumed for the IU compliance scenario:

Direct external radiation exposure pathway Inhalation exposure pathway Ingestion exposure via aquatic food from the intake/discharge canal Inadvertent ingestion of contaminated soil 2.4 The CV was calculated using the floor dimensions for the RB, TB, and ORB in Holtec-00045 Calc-001 [3.5]. The floor areas (m2) are multiplied by 1m to obtain the total volume of fill material immediately adjacent at 1m to the floor surface and summed. Table 1 shows these calculations.

Unit conversion factor: 10.7639 ft2 = 1m2.

0.91m 1m Conceptual Model for Embedded Pipe DCGLs fill (site cap - sand) 6.9m UZ: assumed clean basement fill material (sand) (average depth to GW4.42m)

SZ: assumed clean basement fill material (sand)

<---- well intake depth, 4.39m (N/A for IU) ----------------

SZ ---------------------------------------->

CZ = sum CV of all 3 bldg floor areas (100% in SZ); CV = 6355m3

<--------------------------------------------------- 90m (= LPAF) ---------------------------------------------------->

I ---------------------------------------------------------------------------------------------------------------------------

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 4 Table 2. Contaminated Volume Calculations Building Area (ft2)*

Area (m2)

Volume (m3)

ORB 3519.6 327.0 327.0 RB 17424 1618.7 1618.7 TB 47464 4409.6 4409.6 Total CA 68407.6 6355.3 6355.3

  • Building dimensions from Holtec-0045 Calc-001 CV (m3) = (floor surface areas, m2) x (1m adjacent fill).

2.5 The cover above the CV consists of the planned 3ft site cap plus the unsaturated zone (UZ) and a portion of the saturated zone (SZ). Figure 1 shows the relationship of these components of the cover. The cover thickness was determined using the area-weighting approach shown below:

Site cap = 3 ft, or 0.91m (assumed sand)

ORB wall above CV = 3.4m; total cover thickness above ORB CV = 3.4 + 0.91 = 4.3m RB wall above CV = 12.1m; total cover thickness above RB CV = 12.1 + 0.91 = 13m TB wall above CV = 5.25m; total cover thickness above ORB CV = 5.25 + 0.91 = 6.2m Bldg Fraction total area area-weighted cover thickness ORB 0.05 0.22 RB 0.25 3.32 TB 0.69 4.27 7.81 2.6 The CZ area 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 1m.

CZ Area (m2) = CV (m3)/CVh (m) = r2 6355.3 m3/1 m = r2 6355.3 m2 = r2 = CZ area 2022.95 m2 = r2 44.98m = r 2r = diameter = 89.95m, rounded to 90m = LPAF 2.7 Fraction of CV in the saturated zone (SZ) = 1.0 (CV covered by 7.81m of site soil, which places it below the average groundwater depth of 4.42m [3.4]).

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 [3.7], the OCS HSA [3.6], and well installation logs).

Distributions for Kd values, density, porosity, field capacity, and RESRAD b parameter for sand are taken from NUREG/CR-7267 [3.8] and are applied in the probabilistic analyses.

2.9 Table 3 summarizes the input values/distribution and the reference source for each input parameter.

Table 3 also indicates RESRAD-Onsite parameter values that have been calculated previously and are documented in calculation ENG-OCS-012.

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 5 3.0 RESULTS 3.1 RESRAD-Onsite 7.2 was executed for each ROC using the input values provided in Table 3. 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 Attachment 1. 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 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 The following RESRAD input parameters were identified as sensitive parameters:

Distribution coefficients (Kd values) in the CZ and SZ Hydraulic gradient in SZ

  • Fish transfer factors
  • Aquatic food fraction Evapotranspiration coefficient Density of CZ 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 for embedded piping with the application of industrial use exposure pathways.

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 6 Table 3. Input Values for RESRAD-Onsite Parameters Input Values for Probabilistic Analysis: OC BFM Embedded Pipe 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 (Kd) (sand soil type assigned to contaminated 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-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 7 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe 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 6355.3 Combined CV from RB, TB, and ORB.

NR NR NR NR Thickness of contaminated zone (m)

P 2

D 1.0 Scenario assumption.

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

P 2

D 90 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

1.0 Entire CV assumed in SZ (conservative assumption).

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

P 2

D 7.81 Area-weighted value for bldg. wall heights.

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 Contaminated zone erosion rate (m/y)

P 2

D 6E-04 Assumed same as cover.

NR NR NR NR

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 8 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 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 NR NR NR NR Precipitation (m/y)

P 2

D 1.4 Annual Report on the Meteorological Program at Oyster Creek Generating Station - average annual precipitation for 2015 through 2020 NR NR NR NR Irrigation (m/y)

B 3

S Uniform Distribution determined using methodology described in Data Collection Handbook and NUREG/CR-6697 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 NR NR NR NR Watershed area for nearby stream or pond (m2)

P 3

D 1.01E+08 NJ-GeoWeb (NJDEP BGIS)

NR NR NR NR 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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 9 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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

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

- 0.0253 0.216 0.501 1.90 0.975 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 4.42 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. NOTE:

no impact for IU scenario.

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 Uniform Min, and max value based on site irrigation and general case parameter values presented in NUREG/CR-7267.

407 567 487 Unsaturated Zone Hydrological Data Number of unsaturated zone strata P

3 D

0 UZ above CZ and is assumed part of cover.

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

P 1

D N/A Input not required when number of UZ = 0.

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

P 2

S N/A Input not required when number of UZ = 0.

Unsat. zone 1, total porosity P

2 S

N/A Input not required when number of UZ = 0.

Unsat. zone 1, effective porosity P

2 D

N/A Input not required when number of UZ = 0.

Unsat. zone 1, field capacity P

3 D

N/A Input not required when number of UZ = 0.

Unsat. zone 1, hydraulic conductivity (m/y)

P 2

D N/A Input not required when number of UZ = 0.

Unsat. zone 1, soil-specific b parameter P

2 S

N/A Input not required when number of UZ = 0.

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/workday for daily work breaks NR NR NR NR Fraction of time spent outdoors B

3 D

0.2 Fraction of calendar year assuming 7h/workday 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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 10 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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

D Triangular NUREG/CR-7267 NR NR NR NR 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 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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 11 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 12 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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.

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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 13 Input Values for Probabilistic Analysis: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 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 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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 14 of 38 Table 4: Sensitive Input Parameter by Radionuclide Radionuclide Sensitive Parameter PRCC Value Am-241 Kd of Am-241 in CZ Kd of Am-241 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Am

-0.93

-0.93 0.45 0.58 0.76 C-14 Kd of C-14 in CZ Kd of C-14 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for C

-0.91

-0.92 0.40 0.58 0.84 Cm-243 Kd of Cm-243 in CZ Kd of Pu-239 in CZ Kd of Pu-239 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Pu

-0.36

-0.80

-0.85 0.35 0.63 0.83 Cm-244 Kd of Cm-244 in CZ Kd of Pu-240 in CZ Kd of Pu-240 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Pu

-0.34

-0.81

-0.87 0.36 0.61 0.82 Co-60 Kd of Co-60 in CZ Kd of Co-60 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Co

-0.95

-0.95 0.36 0.46 0.60 Cs-137 Kd of Cs-137 in CZ Kd of Cs-137 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Cs

-0.92

-0.93 0.46 0.58 0.77 Eu-152 Kd of Eu-152 in CZ Kd of Eu-152 in SZ Aquatic food fraction Fish TF for Eu

-0.95

-0.95 0.43 0.67 Eu-154 Kd of Eu-154 in CZ Kd of Eu-154 in SZ SZ hydraulic gradient Aquatic food fraction Fish TF for Eu

-0.95

-0.95 0.30 0.42 0.64 Fe-55 SZ hydraulic gradient Aquatic food fraction Fish TF for Fe 0.73 0.81 0.93

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 15 of 38 Radionuclide Sensitive Parameter PRCC Value H-3 Density of CZ Evapotranspiration coefficient SZ hydraulic gradient Aquatic food fraction Kd of H-3 in CZ Fish TF for H 0.26 0.38

-0.41 0.98

-0.31 0.65 Mn-54 SZ hydraulic gradient Aquatic food fraction Kd of Mn-54 in CZ Kd of Mn-54 in SZ 0.38 0.48

-0.94

-0.94 Nb-94 SZ hydraulic gradient Aquatic food fraction Kd of Nb-94 in CZ Kd of Nb-94 in SZ Fish TF for Nb 0.37 0.61

-0.85

-0.87 0.84 Ni-63 SZ hydraulic gradient Aquatic food fraction Kd of Ni-63 in CZ Kd of Ni-63 in SZ Fish TF for Ni 0.36 0.53

-0.93

-0.94 0.48 Np-237 SZ hydraulic gradient Aquatic food fraction Kd of Np-237 in CZ Kd of Np-237 in SZ Fish TF for Np 0.37 0.66

-0.86

-0.87 0.69 Pu-238 SZ hydraulic gradient Aquatic food fraction Kd of Pu-238 in CZ Kd of Pu-238 in SZ Fish TF for Pu 0.52 0.66

-0.91

-0.92 0.87 Pu-239 SZ hydraulic gradient Aquatic food fraction Kd of Pu-239 in CZ Kd of Pu-239 in SZ Fish TF for Pu 0.39 0.66

-0.87

-0.89 0.86 Pu-240 SZ hydraulic gradient Aquatic food fraction Kd of Pu-240 in CZ Kd of Pu-240 in SZ Fish TF for Pu 0.37 0.64

-0.88

-0.88 0.85 Pu-241 SZ hydraulic gradient Aquatic food fraction Kd of Pu-241in CZ Kd of Pu-241 in SZ Fish TF for Pu 0.48 0.62

-0.88

-0.88 0.80

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 16 of 38 Radionuclide Sensitive Parameter PRCC Value Sb-125 SZ hydraulic gradient Aquatic food fraction Kd of Sb-125 in CZ Kd of Sb-125 in SZ Kd of Te-125m in SZ Fish TF for Sb 0.30 0.45

-0.83

-0.77 0.52 0.73 Sr-90 SZ hydraulic gradient Aquatic food fraction Kd of Sr-90 in CZ Kd of Sr-90 in SZ Fish TF for Sr 0.38 0.58

-0.90

-0.91 0.62 Tc-99 Aquatic food fraction Fish TF for Tc 0.87 0.97

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 17 of 38 Table 5: RESRAD-Generated Percentile Values for Sensitive Input Parameters Sensitive Input Parameter Affected Nuclide RESRAD Percentile Value 25th 75th Kd in CZ Am-241 C-14 Cm-243 Cm-244 Co-60 Cs-137 Eu-152 Eu-154 H-3 Mn-54 Nb-94 Ni-63 Np-237 Pu-238 Pu-239 Pu-240 Pu-241 Sb-125 Sr-90 2.69E+02 6.13E+00 5.74E+02 5.74E+02 3.71E+01 1.58E+02 6.40E+01 6.40E+01 4.30E-03 1.66E+02 5.86E+02 2.77E+01 5.49E+00 1.56E+02 1.56E+02 1.56E+02 1.57E+02 5.07E+00 6.58E+00 Kd in SZ Am-241 C-14 Co-60 Cs-137 Eu-152 Eu-154 Mn-54 Nb-94 Ni-63 Np-237 Pu-238 Pu-239 Pu-240 Pu-241 Sb-125 Sr-90 Te-125m 2.69E+02 6.13E+00 3.71E+01 1.58E+02 6.40E+01 6.40E+01 1.66E+02 5.86E+02 2.77E+01 5.49E+00 1.56E+02 1.56E+02 1.56E+02 1.57E+02 5.07E+00 6.58E+00 4.79E+03 SZ hydraulic gradient All ROCs except Tc-99, and H-3 H-3 3.25E-02 1.75E-02 Aquatic food fraction All ROCs 6.09E-01

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 18 of 38 Sensitive Input Parameter Affected Nuclide RESRAD Percentile Value 25th 75th Fish TF Am-241 C-14 Co-60 Cs-137 Eu-152 Eu-154 Fe-55 H-3 Nb-94 Ni-63 Np-237 Pu-238 Pu-239 Pu-240 Pu-241 Sb-125 Sr-90 Tc-99 5.14E+02 9.28E+05 1.35E+02 4.48E+03 3.95E+02 3.95E+02 5.90E+02 1.07E+00 6.27E+02 3.01E+01 4.21E+01 4.32E+04 4.32E+04 4.32E+04 4.32E+04 1.00E+02 7.72E+00 4.21E+01 Density of CZ H-3 1.62E+00 Evapotranspiration coefficient H-3 6.87E-01

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 19 PRCC Values at Time of Peak of the Mean Dose

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 20 Am-241 Results:

RESRAD Regression and Correlation output 12/19/23 10:22 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Am241 Input File : BFM-IU-EP_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 24 0.00 24 0.00 1 -0.93 1 -0.63 Kd of Am-241 in Saturated Zone 12 -0.02 13 -0.02 2 -0.93 2 -0.63 Kd of Np-237 in Contaminated Zone 16 -0.01 18 -0.01 25 0.00 25 0.00 Kd of Np-237 in Saturated Zone 1 0.26 1 0.25 23 0.00 23 0.00 Kd of Th-229 in Contaminated Zone 23 0.00 23 0.00 19 -0.01 19 0.00 Kd of Th-229 in Saturated Zone 27 0.00 27 0.00 20 -0.01 20 0.00 Kd of U-233 in Contaminated Zone 25 0.00 25 0.00 12 -0.02 13 0.00 Kd of U-233 in Saturated Zone 21 -0.01 22 -0.01 27 0.00 27 0.00 Density of cover material 6 0.03 8 0.03 22 -0.01 22 0.00 Density of contaminated zone 8 -0.03 4 -0.10 8 -0.04 8 -0.03 Contaminated zone total porosity 9 -0.03 5 -0.08 7 -0.05 7 -0.04 Contaminated zone b parameter 7 0.03 10 0.03 9 -0.04 10 -0.01 Evapotranspiration coefficient 18 0.01 19 0.01 26 0.00 26 0.00 Irrigation 5 0.04 7 0.03 17 0.01 17 0.00 Density of saturated zone 22 -0.01 16 -0.02 6 -0.08 6 -0.06 Saturated zone total porosity 17 -0.01 9 -0.03 14 0.02 9 0.01 Saturated zone hydraulic gradient 14 0.02 15 0.02 5 0.45 5 0.12 Mass loading for inhalation 26 0.00 26 0.00 16 -0.01 16 0.00 Indoor dust filtration factor 11 0.02 12 0.02 24 0.00 24 0.00 External gamma shielding factor 13 0.02 14 0.02 13 -0.02 14 0.00 Soil ingestion 4 -0.04 6 -0.04 18 -0.01 18 0.00 Aquatic food 19 -0.01 20 -0.01 4 0.58 4 0.17 Depth of soil mixing layer 15 -0.02 17 -0.01 15 -0.01 15 0.00 Fish transfer factor for Am 3 0.17 3 0.16 3 0.76 3 0.29 Fish transfer factor for Np 2 0.23 2 0.22 10 0.03 11 0.01 Fish transfer factor for Th 10 -0.02 11 -0.02 21 0.01 21 0.00 Fish transfer factor for U 20 0.01 21 0.01 11 -0.03 12 -0.01 C-14 Results:

RESRAD Regression and Correlation output 12/19/23 11:15 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_C14 Input File : BFM-IU-EP_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 0.00 19 0.00 16 0.01 16 0.00 Density of contaminated zone 5 0.05 2 0.14 8 -0.04 8 -0.03 Contaminated zone total porosity 10 0.03 5 0.10 7 -0.05 7 -0.04 Contaminated zone b parameter 7 0.04 10 0.03 17 0.01 17 0.00 Evapotranspiration coefficient 12 0.02 13 0.02 13 0.02 13 0.01 Irrigation 18 0.00 18 0.00 15 0.01 15 0.00 Density of saturated zone 15 0.02 8 0.05 6 -0.05 6 -0.04 Saturated zone total porosity 8 0.03 4 0.10 10 0.03 9 0.03 Saturated zone hydraulic gradient 11 0.03 12 0.02 5 0.40 5 0.12 Mass loading for inhalation 9 0.03 11 0.03 19 0.00 19 0.00 Indoor dust filtration factor 13 0.02 14 0.02 18 -0.01 18 0.00 External gamma shielding factor 14 -0.02 15 -0.02 9 -0.04 10 -0.01 Soil ingestion 16 0.00 16 0.00 12 -0.02 12 -0.01 Aquatic food 2 0.14 3 0.13 4 0.58 4 0.19 Depth of soil mixing layer 6 0.04 9 0.04 11 -0.02 11 -0.01 Thickness of evasion layer of C-14 in soil 17 0.00 17 0.00 14 -0.02 14 0.00 Fish transfer factor for C 1 0.28 1 0.28 3 0.84 3 0.42 Kd of C-14 in Contaminated Zone 3 -0.08 6 -0.08 2 -0.91 2 -0.57 Kd of C-14 in Saturated Zone 4 -0.07 7 -0.07 1 -0.92 1 -0.61 Cm-243 Results:

RESRAD Regression and Correlation output 12/19/23 16:08 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Cm243 Input File : BFM-IU-EP_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 16 -0.01 16 -0.01 31 0.00 31 0.00 Density of contaminated zone 33 0.00 31 0.00 28 0.01 18 0.01 Contaminated zone total porosity 14 -0.01 8 -0.03 23 -0.01 16 -0.01 Contaminated zone b parameter 31 0.00 32 0.00 18 -0.01 20 0.00 Evapotranspiration coefficient 26 0.00 27 0.00 11 0.04 12 0.01 Irrigation 5 0.05 6 0.05 7 -0.06 9 -0.02 Density of saturated zone 9 -0.02 5 -0.06 13 -0.03 8 -0.04 Saturated zone total porosity 30 0.00 20 0.01 8 0.05 7 0.06 Saturated zone hydraulic gradient 21 0.01 22 0.01 6 0.35 6 0.13 Mass loading for inhalation 20 -0.01 21 -0.01 27 -0.01 28 0.00 Indoor dust filtration factor 28 0.00 29 0.00 32 0.00 32 0.00 External gamma shielding factor 10 -0.02 11 -0.01 25 0.01 26 0.00 Soil ingestion 22 0.01 23 0.00 33 0.00 33 0.00 Aquatic food 2 0.24 2 0.21 4 0.63 4 0.28 Depth of soil mixing layer 12 -0.01 13 -0.01 19 0.01 21 0.00 Kd of Ac-227 in Contaminated Zone 25 0.00 26 0.00 10 -0.04 11 -0.01 Kd of Ac-227 in Saturated Zone 23 0.01 24 0.00 9 0.05 10 0.02 Fish transfer factor for Ac 13 0.01 14 0.01 17 -0.01 19 0.00 Kd of Am-243 in Contaminated Zone 15 0.01 15 0.01 21 0.01 23 0.00 Kd of Am-243 in Saturated Zone 7 -0.03 9 -0.03 26 -0.01 27 0.00 Fish transfer factor for Am 32 0.00 33 0.00 16 -0.02 17 -0.01

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 21 Kd of Cm-243 in Contaminated Zone 8 -0.03 10 -0.02 5 -0.36 5 -0.13 Kd of Cm-243 in Saturated Zone 27 0.00 28 0.00 29 0.00 29 0.00 Fish transfer factor for Cm 29 0.00 30 0.00 15 0.03 15 0.01 Kd of Pa-231 in Contaminated Zone 11 -0.02 12 -0.01 12 0.04 13 0.01 Kd of Pa-231 in Saturated Zone 24 0.00 25 0.00 20 -0.01 22 0.00 Fish transfer factor for Pa 6 0.04 7 0.04 24 -0.01 25 0.00 Kd of Pu-239 in Contaminated Zone 4 -0.15 4 -0.13 3 -0.80 3 -0.45 Kd of Pu-239 in Saturated Zone 3 -0.17 3 -0.15 1 -0.85 1 -0.55 Fish transfer factor for Pu 1 0.44 1 0.42 2 0.83 2 0.50 Kd of U-235 in Contaminated Zone 18 -0.01 18 -0.01 14 0.03 14 0.01 Kd of U-235 in Saturated Zone 19 -0.01 19 -0.01 30 0.00 30 0.00 Fish transfer factor for U 17 -0.01 17 -0.01 22 -0.01 24 0.00 Cm-244 Results:

RESRAD Regression and Correlation output 12/19/23 19:22 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Cm244 Input File : BFM-IU_EP_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 13 0.03 15 0.02 18 -0.02 18 -0.01 Density of contaminated zone 14 -0.03 6 -0.07 11 0.03 9 0.04 Contaminated zone total porosity 9 -0.04 5 -0.11 17 0.02 10 0.02 Contaminated zone b parameter 15 0.02 16 0.02 25 -0.01 25 0.00 Evapotranspiration coefficient 21 0.01 22 0.01 10 0.04 12 0.01 Irrigation 22 0.01 24 0.01 24 -0.01 24 0.00 Density of saturated zone 25 -0.01 13 -0.02 8 -0.04 7 -0.04 Saturated zone total porosity 26 0.00 23 -0.01 9 0.04 8 0.04 Saturated zone hydraulic gradient 6 0.06 8 0.05 5 0.36 5 0.13 Mass loading for inhalation 7 0.05 9 0.04 7 -0.05 11 -0.02 Indoor dust filtration factor 12 0.03 14 0.02 28 0.00 28 0.00 External gamma shielding factor 23 -0.01 25 -0.01 31 0.00 31 0.00 Soil ingestion 24 -0.01 26 -0.01 32 0.00 32 0.00 Aquatic food 2 0.25 2 0.21 4 0.61 4 0.26 Depth of soil mixing layer 10 0.03 11 0.03 29 0.00 29 0.00 Fish transfer factor for Cm 31 0.00 31 0.00 15 -0.02 16 -0.01 Fish transfer factor for Pu 1 0.48 1 0.46 2 0.82 2 0.48 Fish transfer factor for U 30 0.00 30 0.00 13 -0.03 14 -0.01 Kd of Cm-244 in Contaminated Zone 8 -0.04 10 -0.04 6 -0.34 6 -0.12 Kd of Cm-244 in Saturated Zone 32 0.00 32 0.00 26 0.00 26 0.00 Kd of Pu-240 in Contaminated Zone 4 -0.15 4 -0.13 3 -0.81 3 -0.46 Kd of Pu-240 in Saturated Zone 3 -0.16 3 -0.13 1 -0.87 1 -0.58 Kd of Ra-228 in Contaminated Zone 19 -0.02 20 -0.01 21 0.01 21 0.00 Kd of Ra-228 in Saturated Zone 29 0.00 29 0.00 27 0.00 27 0.00 Kd of Th-228 in Contaminated Zone 16 -0.02 17 -0.02 20 0.01 20 0.00 Kd of Th-228 in Saturated Zone 28 0.00 28 0.00 14 0.03 15 0.01 Kd of Th-232 in Contaminated Zone 11 -0.03 12 -0.03 16 0.02 17 0.01 Kd of Th-232 in Saturated Zone 27 0.00 27 0.00 30 0.00 30 0.00 Kd of U-236 in Contaminated Zone 20 -0.01 21 -0.01 23 0.01 23 0.00 Kd of U-236 in Saturated Zone 17 0.02 18 0.02 19 0.01 19 0.00 Fish transfer factor for Ra 18 -0.02 19 -0.01 22 0.01 22 0.00 Fish transfer factor for Th 5 0.08 7 0.07 12 -0.03 13 -0.01 Co-60 Results:

RESRAD Regression and Correlation output 12/19/23 11:33 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Co60 Input File : BFM-IU-EP_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 15 0.01 15 0.01 8 0.03 11 0.01 Density of contaminated zone 12 0.01 5 0.03 12 0.01 10 0.01 Contaminated zone total porosity 14 0.01 6 0.03 11 0.02 8 0.01 Contaminated zone b parameter 13 -0.01 14 -0.01 15 0.00 15 0.00 Evapotranspiration coefficient 18 0.00 18 0.00 10 -0.02 12 0.00 Irrigation 6 0.02 8 0.02 14 0.01 14 0.00 Density of saturated zone 2 -0.04 1 -0.14 7 -0.04 6 -0.03 Saturated zone total porosity 4 -0.03 2 -0.11 9 0.03 7 0.02 Saturated zone hydraulic gradient 7 -0.02 9 -0.02 5 0.36 5 0.09 Mass loading for inhalation 9 -0.01 11 -0.01 18 0.00 18 0.00 Indoor dust filtration factor 17 0.00 17 0.00 6 0.04 9 0.01 External gamma shielding factor 8 0.01 10 0.01 16 0.00 16 0.00 Soil ingestion 16 -0.01 16 -0.01 17 0.00 17 0.00 Aquatic food 3 0.04 4 0.04 4 0.46 4 0.12 Depth of soil mixing layer 11 -0.01 13 -0.01 13 -0.01 13 0.00 Kd of Co-60 in Contaminated Zone 5 -0.02 7 -0.02 2 -0.95 2 -0.67 Kd of Co-60 in Saturated Zone 10 -0.01 12 -0.01 1 -0.95 1 -0.68 Fish transfer factor for Co 1 0.08 3 0.08 3 0.60 3 0.17 Cs-137 Results:

RESRAD Regression and Correlation output 12/19/23 11:53 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Cs137 Input File : BFM-IU-EP_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 11 0.01 12 0.01 10 0.02 11 0.00 Density of contaminated zone 10 0.01 7 0.03 14 0.00 12 0.00

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 22 Contaminated zone total porosity 17 0.00 14 0.01 12 0.01 10 0.01 Contaminated zone b parameter 15 0.00 16 0.00 13 -0.01 14 0.00 Evapotranspiration coefficient 12 0.01 13 0.01 9 -0.02 9 -0.01 Irrigation 16 0.00 17 0.00 16 0.00 16 0.00 Density of saturated zone 7 -0.02 2 -0.07 6 -0.05 6 -0.04 Saturated zone total porosity 14 0.00 9 -0.01 7 0.04 7 0.03 Saturated zone hydraulic gradient 5 0.04 6 0.04 5 0.46 5 0.13 Mass loading for inhalation 8 -0.01 10 -0.01 18 0.00 18 0.00 Indoor dust filtration factor 18 0.00 18 0.00 8 0.04 8 0.01 External gamma shielding factor 9 0.01 11 0.01 17 0.00 17 0.00 Soil ingestion 13 0.01 15 0.01 11 -0.01 13 0.00 Aquatic food 2 0.07 3 0.07 4 0.58 4 0.18 Depth of soil mixing layer 6 -0.03 8 -0.03 15 0.00 15 0.00 Kd of Cs-137 in Contaminated Zone 3 -0.07 4 -0.07 2 -0.92 2 -0.62 Kd of Cs-137 in Saturated Zone 4 -0.06 5 -0.06 1 -0.93 1 -0.64 Fish transfer factor for Cs 1 0.18 1 0.18 3 0.77 3 0.30 Eu-152 Results:

RESRAD Regression and Correlation output 12/19/23 12:23 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP__Eu152 Input File : BFM-IU-EP_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 8 0.01 10 0.01 16 0.01 17 0.00 Density of contaminated zone 12 0.01 7 0.03 20 -0.01 15 0.00 Contaminated zone total porosity 10 0.01 6 0.04 21 0.00 18 0.00 Contaminated zone b parameter 21 0.00 21 0.00 11 -0.02 12 0.00 Evapotranspiration coefficient 17 0.01 17 0.01 17 -0.01 19 0.00 Irrigation 7 0.02 9 0.02 10 -0.03 11 -0.01 Density of saturated zone 5 -0.03 3 -0.09 14 -0.02 7 -0.01 Saturated zone total porosity 4 -0.03 2 -0.10 6 0.05 6 0.04 Saturated zone hydraulic gradient 3 0.04 5 0.04 5 0.24 5 0.05 Mass loading for inhalation 13 -0.01 13 -0.01 13 -0.02 14 0.00 Indoor dust filtration factor 2 -0.04 4 -0.04 9 0.03 10 0.01 External gamma shielding factor 20 -0.01 20 -0.01 7 0.04 8 0.01 Soil ingestion 6 -0.03 8 -0.03 15 0.02 16 0.00 Aquatic food 9 0.01 11 0.01 4 0.43 4 0.10 Depth of soil mixing layer 11 0.01 12 0.01 8 -0.03 9 -0.01 Kd of Eu-152 in Contaminated Zone 15 -0.01 15 -0.01 1 -0.95 1 -0.68 Kd of Eu-152 in Saturated Zone 18 -0.01 18 -0.01 2 -0.95 2 -0.67 Fish transfer factor for Eu 1 0.19 1 0.19 3 0.67 3 0.20 Kd of Gd-152 in Contaminated Zone 19 -0.01 19 -0.01 19 0.01 21 0.00 Kd of Gd-152 in Saturated Zone 16 -0.01 16 -0.01 12 -0.02 13 0.00 Fish transfer factor for Gd 14 -0.01 14 -0.01 18 0.01 20 0.00 Eu-154 Results:

RESRAD Regression and Correlation output 12/19/23 16:26 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Eu154 Input File : BFM-IU_EP_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 8 0.01 10 0.01 8 -0.04 10 -0.01 Density of contaminated zone 12 -0.01 3 -0.03 15 -0.01 12 -0.01 Contaminated zone total porosity 14 -0.01 8 -0.02 13 -0.01 11 -0.01 Contaminated zone b parameter 17 0.00 17 0.00 10 0.02 13 0.01 Evapotranspiration coefficient 2 0.03 5 0.03 11 0.02 14 0.00 Irrigation 11 -0.01 13 -0.01 16 0.01 16 0.00 Density of saturated zone 6 0.02 1 0.06 9 -0.04 6 -0.03 Saturated zone total porosity 7 0.01 2 0.05 12 0.02 8 0.01 Saturated zone hydraulic gradient 1 0.03 4 0.03 5 0.30 5 0.07 Mass loading for inhalation 4 0.02 7 0.02 6 -0.05 7 -0.01 Indoor dust filtration factor 3 0.03 6 0.03 18 0.01 18 0.00 External gamma shielding factor 16 0.00 16 0.00 17 0.01 17 0.00 Soil ingestion 18 0.00 18 0.00 14 0.01 15 0.00 Aquatic food 10 -0.01 12 -0.01 4 0.42 4 0.10 Depth of soil mixing layer 9 0.01 11 0.01 7 -0.04 9 -0.01 Fish transfer factor for Eu 5 0.02 9 0.02 3 0.64 3 0.18 Kd of Eu-154 in Contaminated Zone 15 -0.01 15 -0.01 2 -0.95 2 -0.66 Kd of Eu-154 in Saturated Zone 13 -0.01 14 -0.01 1 -0.95 1 -0.67 Fe-55 Results:

RESRAD Regression and Correlation output 12/20/23 10:00 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Fe55 Input File : BFM-IU_EP_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 17 0.00 17 0.00 18 0.00 18 0.00 Density of contaminated zone 10 -0.02 5 -0.05 8 -0.04 7 -0.04 Contaminated zone total porosity 11 -0.02 6 -0.04 7 -0.04 6 -0.04 Contaminated zone b parameter 8 0.02 11 0.02 15 0.00 15 0.00 Evapotranspiration coefficient 9 0.02 12 0.01 17 0.00 17 0.00 Irrigation 18 0.00 18 0.00 14 0.00 14 0.00 Density of saturated zone 5 -0.03 4 -0.08 4 -0.11 4 -0.11 Saturated zone total porosity 14 0.01 9 0.02 5 0.09 5 0.09 Saturated zone hydraulic gradient 3 0.11 3 0.08 3 0.73 3 0.32 Mass loading for inhalation 16 0.00 16 0.00 13 -0.01 13 0.00

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 23 Indoor dust filtration factor 7 -0.02 10 -0.02 11 0.02 11 0.01 External gamma shielding factor 15 -0.01 15 0.00 10 0.03 10 0.01 Soil ingestion 4 0.03 7 0.03 6 -0.05 8 -0.02 Aquatic food 2 0.19 2 0.15 2 0.81 2 0.42 Depth of soil mixing layer 12 -0.01 13 -0.01 12 -0.02 12 -0.01 Kd of Fe-55 in Contaminated Zone 6 0.03 8 0.02 9 0.04 9 0.01 Kd of Fe-55 in Saturated Zone 13 0.01 14 0.01 16 0.00 16 0.00 Fish transfer factor for Fe 1 0.60 1 0.59 1 0.93 1 0.76 H-3 Results:

RESRAD Regression and Correlation output 12/19/23 16:58 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_H3 Input File : BFM-IU_EP_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 14 0.02 14 0.00 16 0.01 16 0.00 Density of contaminated zone 6 0.28 2 0.21 6 0.26 3 0.16 Contaminated zone total porosity 8 -0.10 7 -0.07 8 -0.14 4 -0.09 Contaminated zone b parameter 13 0.02 13 0.01 9 -0.03 10 -0.01 Evapotranspiration coefficient 4 0.37 5 0.09 4 0.38 6 0.08 Irrigation 11 -0.03 11 -0.01 13 -0.02 13 0.00 Density of saturated zone 9 -0.03 9 -0.02 11 -0.03 9 -0.02 Saturated zone total porosity 18 0.00 17 0.00 18 0.00 17 0.00 Saturated zone hydraulic gradient 3 -0.42 4 -0.11 3 -0.41 5 -0.09 Mass loading for inhalation 15 -0.02 15 0.00 10 -0.03 11 -0.01 Indoor dust filtration factor 10 -0.03 10 -0.01 17 0.00 18 0.00 External gamma shielding factor 12 0.03 12 0.01 14 -0.02 14 0.00 Soil ingestion 17 0.00 18 0.00 15 -0.01 15 0.00 Aquatic food 1 0.97 1 0.90 1 0.98 1 0.92 Depth of soil mixing layer 16 -0.01 16 0.00 12 -0.02 12 0.00 Kd of H-3 in Contaminated Zone 5 -0.33 6 -0.08 5 -0.31 7 -0.07 Kd of H-3 in Saturated Zone 7 -0.20 8 -0.05 7 -0.21 8 -0.04 Fish transfer factor for H 2 0.64 3 0.19 2 0.65 2 0.17 Mn-54 Results:

RESRAD Regression and Correlation output 12/19/23 17:16 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_EP_Mn54 Input File : BFM-IU_EP_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 16 0.00 16 0.00 9 0.03 11 0.01 Density of contaminated zone 8 -0.01 4 -0.04 13 0.01 9 0.01 Contaminated zone total porosity 10 -0.01 7 -0.03 10 0.02 8 0.01 Contaminated zone b parameter 18 0.00 18 0.00 18 0.00 18 0.00 Evapotranspiration coefficient 7 -0.02 9 -0.02 15 -0.01 15 0.00 Irrigation 2 0.04 5 0.04 14 0.01 14 0.00 Density of saturated zone 4 -0.03 1 -0.09 6 -0.04 6 -0.03 Saturated zone total porosity 5 -0.03 2 -0.08 8 0.03 7 0.02 Saturated zone hydraulic gradient 3 -0.04 6 -0.04 4 0.38 4 0.10 Mass loading for inhalation 17 0.00 17 0.00 17 0.00 17 0.00 Indoor dust filtration factor 6 -0.02 8 -0.02 7 0.04 10 0.01 External gamma shielding factor 13 -0.01 13 -0.01 11 0.02 12 0.00 Soil ingestion 12 -0.01 12 -0.01 16 -0.01 16 0.00 Aquatic food 1 0.05 3 0.05 3 0.48 3 0.13 Depth of soil mixing layer 9 -0.01 10 -0.01 12 -0.02 13 0.00 Kd of Mn-54 in Contaminated Zone 11 -0.01 11 -0.01 2 -0.94 2 -0.68 Kd of Mn-54 in Saturated Zone 14 0.00 14 0.00 1 -0.94 1 -0.68 Fish transfer factor for Mn 15 0.00 15 0.00 5 0.19 5 0.05 Nb-94 Results:

RESRAD Regression and Correlation output 12/20/23 11:14 Page: Coef 1 Title : OCS BFM_Industrial Use_IP_Nb94 Input File : BFM-IU_IP_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 7 0.04 8 0.03 10 0.01 11 0.00 Density of contaminated zone 5 0.05 4 0.14 14 0.00 12 0.00 Contaminated zone total porosity 6 0.04 6 0.12 11 -0.01 8 -0.01 Contaminated zone b parameter 18 0.00 18 0.00 9 -0.02 10 -0.01 Evapotranspiration coefficient 11 0.01 11 0.01 15 0.00 15 0.00 Irrigation 17 0.00 17 0.00 13 0.00 14 0.00 Density of saturated zone 16 0.00 14 -0.01 6 -0.05 6 -0.05 Saturated zone total porosity 9 0.02 7 0.06 7 0.04 7 0.04 Saturated zone hydraulic gradient 8 0.02 9 0.02 5 0.37 5 0.13 Mass loading for inhalation 12 -0.01 12 -0.01 12 -0.01 13 0.00 Indoor dust filtration factor 13 -0.01 13 -0.01 8 0.03 9 0.01 External gamma shielding factor 15 0.00 16 0.00 17 0.00 17 0.00 Soil ingestion 14 -0.01 15 -0.01 18 0.00 18 0.00 Aquatic food 2 0.16 2 0.14 4 0.61 4 0.24 Depth of soil mixing layer 10 -0.02 10 -0.02 16 0.00 16 0.00 Kd of Nb-94 in Contaminated Zone 3 -0.16 3 -0.14 2 -0.85 2 -0.51 Kd of Nb-94 in Saturated Zone 4 -0.14 5 -0.12 1 -0.87 1 -0.55 Fish transfer factor for Nb 1 0.41 1 0.40 3 0.84 3 0.50

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 24 Ni-63 Results:

RESRAD Regression and Correlation output 12/20/23 07:03 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Sb125 Input File : BFM-IU_IP_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 12 0.01 12 0.01 8 0.03 11 0.01 Density of contaminated zone 6 0.03 3 0.09 10 0.02 8 0.02 Contaminated zone total porosity 9 0.02 7 0.05 11 0.02 9 0.01 Contaminated zone b parameter 16 0.00 17 0.00 13 -0.01 13 0.00 Evapotranspiration coefficient 10 0.01 10 0.01 16 0.00 16 0.00 Irrigation 18 0.00 18 0.00 18 0.00 18 0.00 Density of saturated zone 17 0.00 15 0.00 6 -0.05 6 -0.04 Saturated zone total porosity 8 0.02 5 0.06 9 0.03 7 0.02 Saturated zone hydraulic gradient 5 0.03 8 0.03 5 0.36 5 0.10 Mass loading for inhalation 13 -0.01 13 -0.01 15 0.00 15 0.00 Indoor dust filtration factor 7 -0.03 9 -0.02 7 0.04 10 0.01 External gamma shielding factor 15 0.00 16 0.00 17 0.00 17 0.00 Soil ingestion 14 0.00 14 0.00 14 0.01 14 0.00 Aquatic food 2 0.11 2 0.10 3 0.53 3 0.16 Depth of soil mixing layer 11 -0.01 11 -0.01 12 -0.01 12 0.00 Kd of Ni-63 in Contaminated Zone 3 -0.07 4 -0.07 2 -0.93 2 -0.65 Kd of Ni-63 in Saturated Zone 4 -0.06 6 -0.06 1 -0.94 1 -0.68 Fish transfer factor for Ni 1 0.16 1 0.16 4 0.48 4 0.14 Np-237 Results:

RESRAD Regression and Correlation output 12/20/23 07:35 Page: Coef 1 Title : OCS BFM_Industrial Use_IP_Np237 Input File : BFM-IU_IP_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 22 0.00 23 0.00 21 0.01 21 0.00 Density of contaminated zone 14 -0.01 10 -0.02 19 0.01 12 0.01 Contaminated zone total porosity 6 -0.03 5 -0.07 24 0.00 22 0.00 Contaminated zone b parameter 21 0.00 21 0.00 12 -0.03 13 -0.01 Evapotranspiration coefficient 12 0.01 14 0.01 9 0.05 10 0.02 Irrigation 15 -0.01 16 0.00 16 -0.01 17 0.00 Density of saturated zone 19 0.00 12 -0.01 6 -0.06 6 -0.07 Saturated zone total porosity 23 0.00 22 0.00 10 0.05 7 0.05 Saturated zone hydraulic gradient 5 0.04 6 0.03 5 0.37 5 0.13 Mass loading for inhalation 17 0.00 18 0.00 8 0.06 9 0.02 Indoor dust filtration factor 24 0.00 24 0.00 18 -0.01 19 0.00 External gamma shielding factor 11 -0.01 13 -0.01 13 0.03 14 0.01 Soil ingestion 10 -0.02 11 -0.01 17 0.01 18 0.00 Aquatic food 2 0.25 2 0.21 4 0.66 4 0.30 Depth of soil mixing layer 20 0.00 20 0.00 11 0.03 11 0.01 Kd of Np-237 in Contaminated Zone 4 -0.21 4 -0.17 2 -0.86 2 -0.56 Kd of Np-237 in Saturated Zone 3 -0.22 3 -0.18 1 -0.87 1 -0.59 Kd of Th-229 in Contaminated Zone 8 -0.02 8 -0.02 14 0.02 15 0.01 Kd of Th-229 in Saturated Zone 18 0.00 19 0.00 23 0.00 24 0.00 Kd of U-233 in Contaminated Zone 13 -0.01 15 -0.01 15 -0.01 16 0.00 Kd of U-233 in Saturated Zone 16 0.01 17 0.00 7 0.06 8 0.02 Fish transfer factor for Np 1 0.50 1 0.47 3 0.69 3 0.32 Fish transfer factor for Th 9 0.02 9 0.02 22 0.00 23 0.00 Fish transfer factor for U 7 0.03 7 0.02 20 -0.01 20 0.00 Pu-238 Results:

RESRAD Regression and Correlation output 12/20/23 09:04 Page: Coef 1 Title : BFM_IU_IP_Pu238 Input File : IBFM-IU_IP_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 9 -0.02 13 -0.02 24 0.01 24 0.00 Density of contaminated zone 10 0.02 5 0.06 10 -0.04 9 -0.03 Contaminated zone total porosity 22 0.01 8 0.04 9 -0.05 8 -0.04 Contaminated zone b parameter 15 -0.02 18 -0.02 33 0.00 33 0.00 Evapotranspiration coefficient 6 -0.03 10 -0.03 21 0.01 21 0.00 Irrigation 11 -0.02 14 -0.02 12 -0.03 12 -0.01 Density of saturated zone 23 0.01 9 0.04 7 -0.06 7 -0.04 Saturated zone total porosity 18 0.02 6 0.05 6 0.08 6 0.07 Saturated zone hydraulic gradient 5 0.05 7 0.05 5 0.52 5 0.15 Mass loading for inhalation 32 0.00 32 0.00 8 -0.05 10 -0.01 Indoor dust filtration factor 16 0.02 19 0.02 14 -0.02 14 -0.01 External gamma shielding factor 13 0.02 16 0.02 29 0.01 29 0.00 Soil ingestion 29 0.01 29 0.01 32 0.00 32 0.00 Aquatic food 3 0.12 3 0.12 4 0.66 4 0.22 Depth of soil mixing layer 26 0.01 26 0.01 20 0.01 20 0.00 Fish transfer factor for Th 19 0.02 21 0.01 16 -0.02 16 -0.01 Fish transfer factor for U 33 0.00 33 0.00 18 0.01 18 0.00 Kd of Pu-238 in Contaminated Zone 4 -0.12 4 -0.11 2 -0.91 2 -0.56 Kd of Pu-238 in Saturated Zone 2 -0.14 2 -0.14 1 -0.92 1 -0.59 Kd of Pb-210 in Contaminated Zone 21 0.01 23 0.01 27 -0.01 27 0.00 Kd of Pb-210 in Saturated Zone 12 -0.02 15 -0.02 15 0.02 15 0.01 Kd of Po-210 in Contaminated Zone 28 -0.01 28 -0.01 11 0.03 11 0.01 Kd of Po-210 in Saturated Zone 25 0.01 25 0.01 17 0.01 17 0.00 Kd of Ra-226 in Contaminated Zone 20 -0.02 22 -0.01 25 0.01 25 0.00

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 25 Kd of Ra-226 in Saturated Zone 14 0.02 17 0.02 30 0.00 30 0.00 Kd of Th-230 in Contaminated Zone 24 -0.01 24 -0.01 28 -0.01 28 0.00 Kd of Th-230 in Saturated Zone 30 0.01 30 0.01 23 0.01 23 0.00 Kd of U-234 in Contaminated Zone 8 -0.02 12 -0.02 26 0.01 26 0.00 Kd of U-234 in Saturated Zone 27 -0.01 27 -0.01 31 0.00 31 0.00 Fish transfer factor for Pb 7 -0.03 11 -0.03 22 0.01 22 0.00 Fish transfer factor for Po 17 -0.02 20 -0.02 13 0.02 13 0.01 Fish transfer factor for Pu 1 0.28 1 0.27 3 0.87 3 0.45 Fish transfer factor for Ra 31 0.00 31 0.00 19 -0.01 19 0.00 Pu-239 Results:

RESRAD Regression and Correlation output 12/20/23 09:52 Page: Coef 1 Title : OCS BFM_Industrial Use_IP_Pu239 Input File : BFM-IU_IP_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 9 0.02 12 0.01 10 0.04 12 0.01 Density of contaminated zone 15 0.01 7 0.03 8 0.05 7 0.04 Contaminated zone total porosity 18 -0.01 8 -0.02 17 0.03 9 0.02 Contaminated zone b parameter 6 -0.03 9 -0.02 25 -0.01 25 0.00 Evapotranspiration coefficient 11 0.01 14 0.01 7 0.06 10 0.02 Irrigation 16 0.01 17 0.01 20 0.02 20 0.01 Density of saturated zone 13 -0.01 5 -0.04 14 -0.03 8 -0.03 Saturated zone total porosity 25 0.00 21 -0.01 6 0.06 6 0.06 Saturated zone hydraulic gradient 10 0.02 13 0.01 5 0.39 5 0.12 Mass loading for inhalation 17 -0.01 18 -0.01 12 -0.04 14 -0.01 Indoor dust filtration factor 21 -0.01 22 -0.01 22 0.02 22 0.00 External gamma shielding factor 26 0.00 26 0.00 18 -0.02 18 -0.01 Soil ingestion 22 -0.01 23 -0.01 23 -0.02 23 0.00 Aquatic food 2 0.12 2 0.10 4 0.66 4 0.26 Depth of soil mixing layer 24 0.00 25 0.00 15 0.03 16 0.01 Fish transfer factor for U 20 -0.01 20 -0.01 24 0.01 24 0.00 Kd of Pu-239 in Contaminated Zone 4 -0.09 4 -0.08 2 -0.87 2 -0.53 Kd of Pu-239 in Saturated Zone 3 -0.11 3 -0.09 1 -0.89 1 -0.56 Kd of Ac-227 in Contaminated Zone 8 -0.02 11 -0.02 11 -0.04 13 -0.01 Kd of Ac-227 in Saturated Zone 23 0.00 24 0.00 26 0.00 26 0.00 Kd of Pa-231 in Contaminated Zone 12 -0.01 15 -0.01 19 0.02 19 0.01 Kd of Pa-231 in Saturated Zone 14 0.01 16 0.01 9 -0.04 11 -0.01 Kd of U-235 in Contaminated Zone 27 0.00 27 0.00 27 0.00 27 0.00 Kd of U-235 in Saturated Zone 5 -0.04 6 -0.03 21 -0.02 21 0.00 Fish transfer factor for Pu 1 0.52 1 0.51 3 0.86 3 0.49 Fish transfer factor for Ac 19 0.01 19 0.01 16 -0.03 17 -0.01 Fish transfer factor for Pa 7 -0.02 10 -0.02 13 0.03 15 0.01 Pu-240 Results:

RESRAD Regression and Correlation output 12/20/23 11:00 Page: Coef 1 Title : OCS BFM_Industrial Use_IP_Pu240 Input File : BFM-IU_IP_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 6 -0.05 8 -0.04 15 -0.02 15 -0.01 Density of contaminated zone 17 0.01 9 0.04 7 0.06 7 0.06 Contaminated zone total porosity 13 0.02 7 0.05 9 0.05 8 0.05 Contaminated zone b parameter 24 0.00 24 0.00 25 -0.01 25 0.00 Evapotranspiration coefficient 25 0.00 25 0.00 17 0.02 17 0.01 Irrigation 16 0.02 17 0.01 18 -0.02 18 -0.01 Density of saturated zone 23 0.00 18 0.01 13 -0.02 9 -0.02 Saturated zone total porosity 8 0.03 6 0.08 6 0.08 6 0.07 Saturated zone hydraulic gradient 7 0.04 10 0.04 5 0.37 5 0.12 Mass loading for inhalation 9 -0.02 11 -0.02 10 0.03 11 0.01 Indoor dust filtration factor 10 0.02 12 0.02 20 -0.01 20 0.00 External gamma shielding factor 29 0.00 29 0.00 28 0.00 28 0.00 Soil ingestion 11 -0.02 13 -0.02 27 0.00 27 0.00 Aquatic food 3 0.15 3 0.13 4 0.64 4 0.26 Depth of soil mixing layer 28 0.00 28 0.00 29 0.00 29 0.00 Fish transfer factor for Th 22 0.01 23 0.01 23 -0.01 23 0.00 Fish transfer factor for U 27 0.00 27 0.00 16 -0.02 16 -0.01 Kd of Pu-240 in Contaminated Zone 2 -0.16 2 -0.15 2 -0.87 2 -0.53 Kd of Pu-240 in Saturated Zone 4 -0.13 4 -0.12 1 -0.88 1 -0.55 Kd of Ra-228 in Contaminated Zone 19 -0.01 20 -0.01 11 -0.03 12 -0.01 Kd of Ra-228 in Saturated Zone 20 -0.01 21 -0.01 19 -0.01 19 0.00 Kd of Th-228 in Contaminated Zone 12 0.02 14 0.01 26 0.00 26 0.00 Kd of Th-228 in Saturated Zone 15 -0.02 16 -0.01 24 0.01 24 0.00 Kd of Th-232 in Contaminated Zone 5 0.10 5 0.09 12 -0.03 13 -0.01 Kd of Th-232 in Saturated Zone 14 0.02 15 0.01 21 -0.01 21 0.00 Kd of U-236 in Contaminated Zone 18 -0.01 19 -0.01 14 -0.02 14 -0.01 Kd of U-236 in Saturated Zone 21 -0.01 22 -0.01 22 0.01 22 0.00 Fish transfer factor for Pu 1 0.37 1 0.36 3 0.85 3 0.48 Fish transfer factor for Ra 26 0.00 26 0.00 8 0.05 10 0.02 Pu-241 Results:

RESRAD Regression and Correlation output 12/19/23 18:55 Page: Coef 1 Title : OCS BFM_Industrial Use_IP_Pu241 Input File : BFM-IU_IP_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

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 26 Kd of Am-241 in Contaminated Zone 11 -0.03 14 -0.03 8 -0.10 11 -0.03 Kd of Am-241 in Saturated Zone 16 -0.02 17 -0.02 6 -0.23 6 -0.07 Kd of Np-237 in Contaminated Zone 31 0.00 31 0.00 25 -0.01 25 0.00 Kd of Np-237 in Saturated Zone 27 0.00 28 0.00 18 -0.02 18 -0.01 Kd of Th-229 in Contaminated Zone 25 0.00 26 0.00 24 0.01 24 0.00 Kd of Th-229 in Saturated Zone 26 0.00 27 0.00 16 -0.03 17 -0.01 Kd of U-233 in Contaminated Zone 30 0.00 30 0.00 28 0.00 28 0.00 Kd of U-233 in Saturated Zone 24 0.01 25 0.00 22 -0.01 22 0.00 Density of cover material 6 -0.04 9 -0.04 21 0.01 21 0.00 Density of contaminated zone 13 -0.02 5 -0.07 17 -0.02 12 -0.02 Contaminated zone total porosity 14 -0.02 7 -0.06 13 -0.03 9 -0.03 Contaminated zone b parameter 7 0.04 10 0.04 11 -0.05 13 -0.01 Evapotranspiration coefficient 22 -0.01 22 -0.01 20 -0.02 20 0.00 Irrigation 12 0.02 15 0.02 31 0.00 31 0.00 Density of saturated zone 28 0.00 24 -0.01 9 -0.06 7 -0.06 Saturated zone total porosity 18 0.02 8 0.05 10 0.05 8 0.05 Saturated zone hydraulic gradient 4 0.09 4 0.09 5 0.48 5 0.16 Total Porosity of Unsaturated zone 1 10 0.03 13 0.03 15 -0.03 16 -0.01 Mass loading for inhalation 29 0.00 29 0.00 23 0.01 23 0.00 Indoor dust filtration factor 21 0.01 21 0.01 27 0.00 27 0.00 External gamma shielding factor 8 -0.03 11 -0.03 19 0.02 19 0.00 Soil ingestion 9 -0.03 12 -0.03 14 -0.03 15 -0.01 Aquatic food 5 0.07 6 0.07 4 0.62 4 0.24 Depth of soil mixing layer 17 0.02 18 0.02 26 -0.01 26 0.00 Fish transfer factor for Am 23 0.01 23 0.01 7 0.10 10 0.03 Fish transfer factor for Np 15 -0.02 16 -0.02 29 0.00 29 0.00 Fish transfer factor for Th 20 -0.01 20 -0.01 30 0.00 30 0.00 Fish transfer factor for U 19 -0.01 19 -0.01 12 0.05 14 0.01 Kd of Pu-241 in Contaminated Zone 3 -0.09 3 -0.09 2 -0.88 2 -0.56 Kd of Pu-241 in Saturated Zone 2 -0.10 2 -0.10 1 -0.88 1 -0.56 Fish transfer factor for Pu 1 0.14 1 0.14 3 0.80 3 0.40 Sb-125 Results:

RESRAD Regression and Correlation output 12/20/23 06:40 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Sb125 Input File : BFM-IU_IP_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 8 -0.03 9 -0.03 19 0.01 19 0.00 Density of contaminated zone 15 -0.01 7 -0.05 15 -0.01 13 -0.02 Contaminated zone total porosity 7 -0.03 2 -0.09 12 -0.02 10 -0.03 Contaminated zone b parameter 14 0.01 15 0.01 10 -0.05 12 -0.02 Evapotranspiration coefficient 11 0.02 12 0.02 17 0.01 17 0.00 Irrigation 5 0.05 6 0.05 16 -0.01 16 0.00 Density of saturated zone 21 0.00 21 0.00 9 -0.05 7 -0.07 Saturated zone total porosity 20 0.00 18 -0.01 13 0.02 11 0.02 Saturated zone hydraulic gradient 6 0.03 8 0.03 6 0.30 6 0.12 Mass loading for inhalation 9 -0.03 10 -0.03 21 0.01 21 0.00 Indoor dust filtration factor 19 0.00 20 0.00 14 -0.02 15 -0.01 External gamma shielding factor 18 0.00 19 0.00 18 -0.01 18 0.00 Soil ingestion 17 0.01 17 0.01 20 0.01 20 0.00 Aquatic food 2 0.08 3 0.08 5 0.45 5 0.20 Depth of soil mixing layer 12 0.02 13 0.02 11 -0.03 14 -0.01 Kd of Sb-125 in Contaminated Zone 3 -0.06 4 -0.06 1 -0.83 1 -0.59 Kd of Sb-125 in Saturated Zone 4 -0.05 5 -0.05 2 -0.77 2 -0.47 Kd of Te-125m in Contaminated Zone 13 -0.02 14 -0.02 8 -0.09 9 -0.04 Kd of Te-125m in Saturated Zone 16 -0.01 16 -0.01 4 -0.52 4 -0.24 Fish transfer factor for Sb 1 0.18 1 0.18 3 0.73 3 0.42 Sr-90 Results:

RESRAD Regression and Correlation output 12/20/23 06:23 Page: Coef 1 Title : OCS BFM_Industrial Use_Ip_Sr90 Input File : BFM-IU_IP_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 9 0.02 10 0.02 8 0.03 8 0.01 Density of contaminated zone 5 0.03 4 0.09 18 0.00 16 0.00 Contaminated zone total porosity 11 0.02 7 0.05 12 -0.01 9 -0.01 Contaminated zone b parameter 14 -0.01 15 -0.01 10 -0.02 11 -0.01 Evapotranspiration coefficient 13 0.01 14 0.01 11 0.01 12 0.00 Irrigation 12 -0.01 13 -0.01 15 0.01 15 0.00 Density of saturated zone 17 0.00 12 0.01 6 -0.05 6 -0.04 Saturated zone total porosity 6 0.02 5 0.08 7 0.04 7 0.03 Saturated zone hydraulic gradient 8 0.02 9 0.02 5 0.38 5 0.12 Mass loading for inhalation 10 -0.02 11 -0.02 16 0.01 17 0.00 Indoor dust filtration factor 18 0.00 18 0.00 9 0.02 10 0.01 External gamma shielding factor 15 0.01 16 0.01 14 0.01 14 0.00 Soil ingestion 16 0.01 17 0.00 17 -0.01 18 0.00 Aquatic food 2 0.11 2 0.11 4 0.58 4 0.21 Depth of soil mixing layer 7 -0.02 8 -0.02 13 -0.01 13 0.00 Kd of Sr-90 in Contaminated Zone 3 -0.09 3 -0.09 2 -0.90 2 -0.61 Kd of Sr-90 in Saturated Zone 4 -0.08 6 -0.07 1 -0.91 1 -0.65 Fish transfer factor for Sr 1 0.25 1 0.25 3 0.62 3 0.24 Tc-99 Results:

RESRAD Regression and Correlation output 12/20/23 05:55 Page: Coef 1 Title : OCS BFM_Industrial Use_IR_Tc99 Input File : BFM-IU_IP_TC99.RAD Coefficients for peak of mean dose time Dose Coefficient = PCC SRC PRCC SRRC

BHI Energy ENG-OCS-014 BFM Probabilistic Analysis for Embedded Pipe Scenario Rev. 0 Page 27 Repetition = 1 1 1 1 Description of Probabilistic Variable Sig Coeff Sig Coeff Sig Coeff Sig Coeff Density of cover material 14 -0.02 16 -0.01 17 0.00 17 0.00 Density of contaminated zone 6 0.05 3 0.09 8 0.07 5 0.05 Contaminated zone total porosity 18 -0.01 15 -0.01 7 -0.07 4 -0.05 Contaminated zone b parameter 13 0.02 14 0.01 11 -0.02 12 -0.01 Evapotranspiration coefficient 5 0.06 7 0.03 6 0.15 8 0.03 Irrigation 15 -0.01 17 -0.01 18 0.00 18 0.00 Density of saturated zone 8 -0.04 4 -0.06 14 -0.02 10 -0.01 Saturated zone total porosity 16 -0.01 8 -0.02 10 -0.02 9 -0.02 Saturated zone hydraulic gradient 4 -0.08 6 -0.04 4 -0.18 6 -0.04 Mass loading for inhalation 12 0.02 13 0.01 13 -0.02 14 0.00 Indoor dust filtration factor 10 -0.03 11 -0.02 15 0.02 15 0.00 External gamma shielding factor 17 0.01 18 0.01 12 0.02 13 0.01 Soil ingestion 11 0.03 12 0.02 9 -0.04 11 -0.01 Aquatic food 2 0.48 2 0.29 2 0.87 2 0.40 Depth of soil mixing layer 7 -0.04 9 -0.02 16 -0.01 16 0.00 Kd of Tc-99 in Contaminated Zone 3 -0.09 5 -0.05 3 -0.24 3 -0.06 Kd of Tc-99 in Saturated Zone 9 -0.03 10 -0.02 5 -0.16 7 -0.04 Fish transfer factor for Tc 1 0.84 1 0.80 1 0.97 1 0.88

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