ML24214A064

Enclosure 16: ENG-OCS-015 Revision: 1, Basement Fill Model: Calculation of Embedded Pipe Dcgl Values Oyster Creek Station, March 6, 2024

ML24214A064
Person / Time
Site:	Oyster Creek
Issue date:	03/06/2024
From:	Bisson J BHI Energy, Holtec Decommissioning International
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
HDI-OC-24-018 ENG-OCS-015, Rev 1
Download: ML24214A064 (1)

Text

ENGINEERING CALCULATION Basement Fill Model:

Calculation of Embedded Pipe DCGL Values Oyster Creek Station ENG-OCS-015 Revision: 1 March 6, 2024 Prepared by:

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

@Westinghouse

• BHI energy

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 1 1.0 PURPOSE This calculation documents the development of Basement Fill Model (BFM) derived concentration guideline levels values for embedded pipes (DCGLep) applying the exposure pathways assumed for the Industrial Use (IU) scenario to support the assessment of below-grade concrete foundations.

2.0 APPLICABILITY This calculation addresses only the development of BFM DCGLep values for below grade concrete foundations at the Oyster Creek site.

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 ENG-OCS-014, Basement Fill Model: Probabilistic Analysis for Embedded Pipes Scenario, Rev. 0 3.4 Radionuclide Selection for DCGL Development-Oyster Creek Station Site Characterization Project, January 2022 3.5 ENG-OCS-012, Basement Fill Model: Probabilistic Analysis for Instantaneous Release Scenario Assuming Industrial Use Exposure Pathways, Rev. 0.

3.6 Oyster Creek Station Historical Site Assessment, Rev. 2, November 2021 3.7 Hydrogeologic Investigation Report, GHD, January 2017 4.0 DISCUSSION 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.

RESRAD-Onsite code executions were performed for each ROC identified for the OCS site. The probabilistic module of RESRAD-Onsite software was used to compute a peak of the mean (POM) dose, which was used to determine the DCGL values corresponding to the NRC dose criteria established in 10CFR20.1403 (i.e., 25 mrem/y). The DCGL value for each ROC was calculated as follows:

DCGL(pCi/m2) = (25 mrem/y)÷[(POM dose (mrem/y per pCi/g)*(fill concentration, pCi/g per 1 pCi/m2)].

The BFM DCGLep values are based on a scenario which assumes an instantaneous release of residual internal surface radioactivity in embedded pipes to 1m of fill directly above the concrete floors of the 3 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 3 foundations are summed and the summed CV is modeled as the contaminated zone (CZ), which is assumed covered by site soil 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 CZ is shown in Figure 1.

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 2 Figure 1: Conceptual Configuration of CV for Embedded Pipes (note: not to scale)

IU Scenario and Exposure Pathways The Industrial Use Scenario assumes that the average member of the critical group is a hypothetical full-time industrial site worker assigned 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 Accordingly, the DCGLep values address the exposure pathways listed above. Input for these calculations include the reasonably conservative input values for RESRAD parameters identified as sensitive in Calculation ENG-OCS-0014 [3.3].

Radionuclide-of-concern (ROC) 0.91m 1m

<---- 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) ---------------------------------------------------->

Conceptual Model for Embedded Pipe DCGLs

<------------------------cover, 7.81m (area-weighted average wall height)------------------------>

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) 1

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 3 A site-specific suite of potential ROCs has been identified for the OCS site [3.4]. 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.

5.0 CALCULATIONS 5.1 The CV was calculated using the floor dimensions for the RB, TB, and ORB in Holtec-00045 Calc-001. 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.

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).

5.2 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 (site soil - sand)

Below-grade wall heights from Holtec-0045 Calc-001:

ORB = 14.4 ft = 4.4m; RB = 43 ft = 13.1m; TB = 20.5 ft = 6.25m

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 4 Total cover thickness above ORB CV = 4.4m - 1m + 0.91m = 4.3m Total cover thickness above RB CV = 13.1m - 1m + 0.91m = 13m Total cover thickness above TB CV = 6.25m - 1m + 0.91m = 6.2m Fractions of total area:

ORB: 327m2/6355.3m2 = 0.05; RB: 1618.7m2/6355.3m2 = 0.25; TB: 4409.6m2/6355.3m2 = 0.69 Area-weighted cover thickness:

ORB: (0.05)(4.3m) = 0.22m RB: (0.25)(13m) = 3.32m TB: (0.69)(6.2m) = 4.27m Total = 7.81m 5.3 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, and 2r = diameter = 89.95m, rounded to 90m = LPAF 5.4 Fraction of CV in the saturated zone (SZ) = 1.0 (CV covered by 7.81m site soil, which places it below the average groundwater depth of 4.42m [3.5]).

5.5 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 NURREG/CR-7267 and are applied in the probabilistic analyses.

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

6.0 RESULTS 6.1 The calculated POM dose for each ROC is provided in column 2 of Table 4. The calculated POM doses from the RESRAD-Onsite 7.2 output reports are provided by ROC in Attachment 1.

6.2 Concentration in fill (Cf) in pCi/g per initial surface contamination = 1 pCi/m2:

Pipe internal area by building:

RB = 1107.8 ft2 = 102.9 m2 (source: HOLTEC-00064 Calc-001)

TB = 3425.4 ft2 = 318.2 m2 (source: HOLTEC-00041 Calc-001 rev1)

ORB = 532.2 ft2 = 49.2 m2 (source: HOLTEC-00064 Calc-001)

Total = 470.6 m2 Cf = (initial pipe contamination)(pipe SA)÷(floor SA)(CV thickness)(soil density)(unit CF)

= (pCi/m2)(m2)÷(m2)(m)(g/cm3)(106cm3/m3) = pCi/g

= (1)(470.6)÷(6355.3)(1)(1.5105)(106) = 4.9E-08 pCi/g.

Note: the median value for the sand density distribution from NUREG/CR-7267 is assumed as the value for soil density.

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 5 6.3 Column 3 of Table 4 provides the DCGL values corresponding to an annual dose equal to 25 mrem.

The DCGL for each ROC was calculated from the POM dose using the following relationship:

DCGL(pCi/m2) = (25 mrem/y)÷(POM mrem/y per 1 pCi/g)*(Cf, pCi/g per 1 pCi/m2)

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 6 Table 3. Input Values for RESRAD-Onsite Parameters Input Values for DCGL Calculations: 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 coefficient, kd (values/distributions for sand soil type; assigned to contaminated zone (CZ) and saturated zone (SZ) (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 D

2.69E+02 (CZ, SZ) 25th percentile value 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 D

6.13E+00 (CZ, SZ) 25th percentile value Cm-243 P

1 D

S 5.74E+02 (CZ)

Truncated lognormal-n (SZ) 25th percentile value ANL/EVS/TM-14/4 8.13 2.64 0.001 0.999 3400 Cm-244 P

1 D

S 5.74E+02 (CZ)

Truncated lognormal-n (SZ) 25th percentile value ANL/EVS/TM-14/4 8.13 2.64 0.001 0.999 3400 Co-60 P

1 D

3.71E+01 (CZ, SZ) 25th percentile value Cs-137 P

1 D

1.58E+02 (CZ, SZ) 25th percentile value Eu-152 P

1 D

6.40E+01 (CZ, SZ) 25th percentile value Eu-154 P

1 D

6.40E+01 (CZ, SZ) 25th percentile value 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 D

S 4.30E-03 (CZ)

Truncated lognormal-n (SZ)

NUREG/CR-7267

-2.81 0.5 0.001 0.999 0.06 Mn-54 P

1 D

1.66E+02 (CZ, SZ) 25th percentile value Nb-94 P

1 D

5.86E+02 (CZ, SZ) 25th percentile value Ni-63 P

1 D

2.77E+01 (CZ, SZ) 25th percentile value Np-237 P

1 D

5.49E+00 (CZ, SZ) 25th percentile value 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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 7 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario Pu-238 P

1 D

1.56E+02 (CZ, SZ) 25th percentile value Pu-239 P

1 D

1.56E+02 (CZ, SZ) 25th percentile value Pu-240 P

1 D

1.56E+02 (CZ, SZ) 25th percentile value Pu-241 P

1 D

1.57E+02 (CZ, SZ) 25th percentile value 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 D

5.07E+00 (CZ, SZ) 25th percentile value Sr-90 P

1 D

6.58E+00 (CZ, SZ) 25th percentile value 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 (CZ) 4.79E+03 (SZ)

NUREG/CR-7267 75th percentile value 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 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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 8 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 D

Truncated Normal (all ROCs except H-3) 1.62E+00 (H-3)

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

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

75th percentile value 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 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

D Uniform (all ROCs except H-3) 6.87E-01 (H-3)

NUREG/CR-7267 distribution 75th percentile value 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 Meteological 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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 9 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 Saturated zone hydraulic gradient P

2 D

D S

3.25E-02 (all ROCs except H-3 and Tc-99) 1.75E-02 (H-3)

Uniform (Tc-99) 75th percentile value 25th percentile value 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.

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 10 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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/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

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

6.09E-01 (all ROCs) 75th percentile value Contamination fraction of plant food P

3 D

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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 11 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 12 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 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)

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 13 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 (Transfer) 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 D

5.14E+02 75th percentile value Am-243 P

2 S

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

2 D

9.28E+05 75th percentile value 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 D

1.35E+02 75th percentile value Cs-137 P

2 D

4.48E+03 75th percentile value Eu-152 P

2 D

3.95E+02 75th percentile value Eu-154 P

2 D

3.95E+02 75th percentile value Fe-55 P

2 D

5.90E+02 75th percentile value Gd-152 P

2 S

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

2 D

1.07E+00 75th percentile value Mn-54 P

2 S

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

2 D

6.27E+02 75th percentile value Ni-63 P

2 D

3.01E+01 75th percentile value Np-237 P

2 D

4.21E+01 75th percentile value 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 D

4.32E+04 75th percentile value Pu-239 P

2 D

4.32E+04 75th percentile value Pu-240 P

2 D

4.32E+04 75th percentile value Pu-241 P

2 D

4.32E+04 75th percentile value 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 D

1.00E+02 75th percentile value Sr-90 P

2 D

7.72E+00 75th percentile value Tc-99 P

2 D

4.21E+01 75th percentile value 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

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 14 Input Values for DCGL Calculations: OC BFM Embedded Pipe Scenario to Support the Industrial Use Compliance Scenario 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 3 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-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 15 Table 4: DCGLep Values by Radionuclide ROC Peak of Mean Dose (mrem/y)

DCGLep (pCi/m2)

Am-241 2.52E-03 2.02E+11 C-14 1.42E-01 3.59E+09 Cm-243 5.04E-04 1.01E+12 Cm-244 1.22E-03 4.18E+11 Co-60 6.42E-06 7.94E+13 Cs-137 1.15E-04 4.43E+12 Eu-152 3.86E-06 1.32E+14 Eu-154 3.94E-06 1.29E+14 Fe-55 5.53E-09 9.22E+16 H-3 7.40E-08 6.89E+15 Mn-54 2.11E-07 2.42E+15 Nb-94 3.52E-06 1.45E+14 Ni-63 2.79E-07 1.83E+15 NP-237 2.13E-02 2.39E+10 Pu-238 1.75E-01 2.91E+09 Pu-239 4.53E-01 1.13E+09 Pu-240 4.49E-01 1.14E+09 Pu-241 1.15E-05 4.43E+13 SB-125 9.87E-06 5.17E+13 Sr-90 1.10E-04 4.64E+12 Tc-99 4.97E-05 1.03E+13 NOTE: Review of the RESRAD reports shows that the POM doses are delivered solely through the aquatic food ingestion pathway. The contributions to total dose via the direct, inhalation, and inadvertent soil ingestion pathways are shown as zeros in the RESRAD reports. These small doses via the aquatic food pathway are likely over-estimations for doses that may be received by a person who ingests fish from the OC canal due primarily to (i) the conservative input for the contaminated fraction of aquatic food (0.609 vs 0.39 distribution mode) and fish transfer factors (75th percentile values in sensitive ROCs distribution) and (ii) RESRAD modeling for the fish ingestion pathway (models a pond/lake, not a flowing canal).

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 16 RESRAD-Onsite Results: Peak of the Mean Doses

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 17 Am-241 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 13:07 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Am241 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\AM241\\BFM-IU-EP_DCGL_AM241.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 2.031E+02 2.517E-03 C-14 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:39 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_C14 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\C14\\BFM-IU-EP_DCGL_C14.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 4.924E+00 1.422E-01 Cm-243 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 15:03 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Cm243 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\CM243\\BFM-IU-EP_DCGL_CM243.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.557E+02 5.040E-04 Cm-244 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 06:04 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Cm244 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\CM244\\BFM-IU_EP_DCGL_CM244.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.557E+02 1.217E-03 Co-60 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 13:46 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Co60 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\CO60\\BFM-IU-EP_DCGL_CO60.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 6.422E+00 6.418E-06 Cs-137 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 13:53 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Cs137 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\CS137\\BFM-IU-EP_DCGL_CS137.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 4.125E+01 1.148E-04 Eu-152 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 14:01 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Eu152 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\EU152\\BFM-IU-EP_DCGL_EU152.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.859E+01 3.861E-06 Eu-154 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:50 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Eu154 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\EU154\\BFM-IU_EP_DCGL_EU154.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.093E+01 3.943E-06

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 18 Fe-55 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 14:24 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Fe55 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\FE55\\BFM-IU_EP_DCGL_FE55.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 3.775E+00 5.528E-09 H-3 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 14:35 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_H3 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\H3\\BFM-IU_EP_DCGL_H3.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 0.000E+00 7.396E-08 Mn-54 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/08/2024 14:46 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IR_EP_DCGL_Mn54 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\OYSTER CREEK\\INDUSTRIAL\\BFM EMBEDDED PIPE\\BILL\\MN54\\BFM-IU_EP_DCGL_MN54.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.000E+00 2.112E-07 Nb-94 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:34 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Nb94 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\NB94\\BFM-IU_EP_DCGL.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 4.507E+02 3.520E-06 Ni-63 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:12 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Ni63 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\NI63\\BFM-IU_EP_DCGL_NI63.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 2.424E+01 2.788E-07 Np-237 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/10/2024 06:42 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_IP_Np237 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\NP237\\BFM-IU_EP_DCGL_NP237.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 4.924E+00 2.126E-02 Pu-238 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/10/2024 08:52 Page 20 Probabilistic results summary : BFM_IU_EP_DCGL_Pu238 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\PU238\\IBFM-IU_EP_DCGL_PU238.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 9.152E+01 1.745E-01

BHI Energy ENG-OCS-015 BFM: Calculation of Embedded Pipe DCGL Values Rev. 1 Page 19 Pu-239 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/10/2024 10:52 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Pu239 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\PU239\\BFM-IU_EP_DCGL_PU239.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.194E+02 4.531E-01 Pu-240 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/11/2024 14:48 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Pu240 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\PU240\\BFM-IU_EP_DCGL_PU240.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 1.194E+02 4.488E-01 Pu-241 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/11/2024 12:57 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Pu241 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\PU241\\BFM-IU_EP_DCGL_PU241.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 2.031E+02 1.151E-05 Sb-125 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:24 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Sb125 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\SB125\\BFM-IU_EP_DCGL_SB125.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 2.219E+00 9.874E-06 Sr-90 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/09/2024 14:55 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Sr90 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\SR90\\BFM-IU_EP_DCGL_SR90.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 4.924E+00 1.104E-04 Tc-99 Results:

RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 01/11/2024 11:34 Page 20 Probabilistic results summary : OCS BFM_Industrial Use_EP_DCGL_Tc99 File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\EMBEDDED PIPE\\TC99\\BFM-IU_EP_DCGL_TC99.RAD Peak of the mean dose (averaged over observations) at graphical times Repetition Time of peak mean dose Peak mean dose Years mrem/yr 1 0.000E+00 4.965E-05