ML25119A307

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Enclosure 26, Tsd 24-081, Revision 0, Oyster Creek Groundwater Dose Calculation Methodology to Support the License Termination Plan, January 23, 2025
ML25119A307
Person / Time
Site: Oyster Creek
Issue date: 04/29/2025
From:
Holtec Decommissioning International
To:
Office of Nuclear Reactor Regulation, Office of Nuclear Material Safety and Safeguards
Shared Package
ML25119A267 List:
References
HDI-OC-25-017 TSD 24-081, Rev. 0
Download: ML25119A307 (1)
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RSCS Technical Support Document No.24-081 Rev 0 Oyster Creek Groundwater Dose Calculation Methodology to Support the License Termination Plan Prepared by:

Joseph Bisson, Technical Consultant Reviewed by:

William Parish, CHP, Sr. Health Physicist Approved by:

Christopher C. Messier, Sr Director of Engineering and Strategic Development ZŽ^ŽŽ^/

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RSCS Radiation Safety & Control Services

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 2 of 15 Table of Contents Introduction............................................................................................................................ 3 Dose Calculation Method...................................................................................................... 5 References............................................................................................................................ 7 List of Tables Table 1: OCNGS Potential ROCs................................................................................................. 4 Table 2: Groundwater DCFs by ROC........................................................................................... 6 Attachment A: RESRAD-Onsite Results Supporting Table 2.... 8

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 3 of 15 Introduction The U.S. Nuclear Regulatory Commission (NRC) radiological criteria for the unrestricted use of a site are established in 10CFR20.1402:

A site will be considered acceptable for unrestricted use if the residual radioactivity that is distinguishable from background radiation results in a TEDE to an average member of the critical group that does not exceed 25 mrem (0.25 mSv) per year, including that from groundwater sources of drinking water, and.

The total effective dose equivalent (TEDE) that meets the NRC criteria for unrestricted site release is the sum of dose contributions from the exposure pathways considered in the site's compliance scenario. As described in Oyster Creek 100 Year Land Use Outlook - Categorization and Justification report (Reference 1), future use of the OCNGS site is expected to remain as industrial due to existing site conditions and planned land uses. Consequently, an industrial use (IU) scenario has been chosen as the OCNGS site compliance scenario. The IU scenario includes four viable exposure pathways: external exposure, inhalation exposure, inadvertent soil ingestion, and aquatic food ingestion.

Groundwater as a source of drinking water has been excluded as a viable ingestion exposure pathway in the OCNGS IU scenario for the following reasons:

Lacey Ordinance #93-31 requires the owner the site to connect to the town waterline and discontinue and disconnect any water service from a water well located on his or her property.

A groundwater Classification Exception Area (CEA) delineated across a major portion of the site will prevent groundwater use in the area.

The exclusion of a drinking water pathway in the IU scenario does not mean that the radiological impact from potentially contaminated groundwater is ignored. The OCNGS derived concentration guideline levels (DCGLs) include the dose contribution from contaminated site groundwater through the aquatic food ingestion pathway, which is the only viable water-dependent exposure pathway for the OCNGS site.

This TSD outlines the method for determining a dose via aquatic food ingestion that is not captured in the DCGL value. The method uses measured concentrations of radioactive contaminants in site groundwater samples and RESRAD-Onsite results from DCGL development.

An "uncaptured" dose is defined as the portion of the dose via the aquatic food pathway that exceeds the aquatic food ingestion dose included in the DCGL values.

Current Analyses Performed for OCNGS Groundwater Samples The OCNGS site groundwater is currently monitored for 5 categories of radionuclides: H-3, gamma-emitting radionuclides, gross alpha, gross beta, and hard-to-detect (HTD) radionuclides, such as Sr-90. As site decommissioning work progresses, the routine analyses for groundwater samples will continue. The groundwater dose calculation method developed herein (i) supports the continued use of current groundwater analyses protocols and (ii) provides confidence that an unaddressed dose impact from contaminated groundwater via the aquatic food ingestion pathway is captured.

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 4 of 15 Twenty-one potential radionuclides-of-concern (ROCs) for the OCNGS site have been identified in TBD 20-6002-1362, Radiological Selection for DCGL Development. Table 1 lists the full suite of ROCs. Additionally, Table 1 lists the analytical method used to identify the ROCs.

Groundwater monitoring at the OCNGS site in conformance with NEI 07-07, Industry Groundwater Protection Initiative (Reference 2) has included extensive monitoring for the majority of the radionuclides identified in Table 1. In 2024, groundwater monitoring for C-14, Eu-152, Eu-153, Nb-94, Np-237, Pu-241, Sb-125 and Tc-99 was added to encompass the full suite of 21 radionuclides.

Table 1: OCNGS Potential ROCs ROC Half-Life (y)

Analysis Method Am-241 4.32E+02 Gross Alpha/Alpha Spec C-14 5.70E+03 Liquid Scintillation Cm-243 2.91E+01 Gross Alpha/Alpha Spec Cm-244 1.81E+01 Gross Alpha/Alpha Spec Co-60 5.30E+00 Gamma analysis Cs-137 3.00E+01 Gamma analysis Eu-152 1.30E+01 Gamma analysis Eu-154 8.60E+00 Gamma analysis Fe-55 2.70E+00 Liquid Scintillation H-3 1.20E+01 Liquid Scintillation Mn-54 8.50E-01 Gamma analysis Nb-94 2.00E+04 Gamma analysis Ni-63 1.00E+02 Liquid Scintillation Np-237 2.14E+06 Gross Alpha/Alpha Spec Pu-238 8.77E+01 Gross Alpha/Alpha Spec Pu-239 2.40E+04 Gross Alpha/Alpha Spec Pu-240 6.58E+03 Gross Alpha/Alpha Spec Pu-241 1.40E+01 Liquid Scintillation Sb-125 2.76E+00 Gamma analysis Sr-90 2.90E+01 Liquid Scintillation Tc-99 2.10E+05 Liquid Scintillation Since the implementation of the groundwater protection program, H-3 is the only ROC that has been identified in site groundwater samples.

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 5 of 15 Dose Calculation Method Basis for the Method An industrial use setting has been determined as the most likely land use following license termination. Accordingly, the site compliance scenario is an industrial use (IU) scenario. In the OCNGS IU scenario, the critical receptor receives a radiation dose through four viable exposure pathways: external exposure, inhalation exposure, inadvertent soil ingestion, and aquatic food ingestion. Of the four exposure pathways, aquatic food ingestion is the only pathway influenced by site groundwater.

The RESRAD-Onsite (v7.2) code was used to model the IU scenario and develop DCGLs for the OCNGS site. The DCGL values include the doses from each of the four exposure pathways; therefore, the impact from groundwater is included in the total dose associated with a DCGL value. The RESRAD-Onsite Uncertainty Reports provide probabilistic doses by pathway and the RESRAD-Onsite Concentration Reports provide the groundwater water concentrations associated with the probabilistic doses.

Information in the RESRAD-Onsite reports provides a process for determining an uncaptured dose from site groundwater via aquatic food ingestion. An uncaptured dose exists when the measured concentration of an ROC in a groundwater sample exceeds the RESRAD-Onsite water concentration associated with the aquatic food dose included in the DCGL value. The doses associated with measured ROC concentrations below or equal to the RESRAD-Onsite water concentrations are captured in the DCGL values.

Dose Calculation Method Step 1: Compare measured concentrations of ROCs to the RESRAD-Onsite water concentrations listed in Table 2.

a. If a measured concentration is below or equal to the RESARD-Onsite concentration, there is no uncaptured dose, and no further action is required.
b. If a measured concentration is greater than the RESRAD-Onsite concentration, proceed to step 2.

Step 2: Use the following equation to determine an uncaptured dose via aquatic food ingestion.

= (,,)

=0 Where:

Doseaf = uncaptured dose via aquatic food ingestion, mrem/year Ci,gw = measured concentration of ROCi in groundwater, pCi/L Ci,RESRADgw= RESRAD-Onsite groundwater concentration for ROCi (value provided in Table 2)

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 6 of 15 DCFi = dose conversion factor (DCF) for ROCi, mrem/year per pCi/L (value provided in Table 2)

Use the values in Table 2 for Cm-244 when assessing an uncaptured dose associated with gross alpha results and the values for Sr-90 when assessing an uncaptured dose associated with gross beta results.

The maximum probabilistic doses via ingestion of aquatic food at 1 year and the water concentrations associated with the doses were used in the development of the DCFi values.

Table 2 lists the DCF values by ROC for use in determining an uncaptured dose.

Table 2: Groundwater DCFs by ROC ROC Aquatic Food Ingestion Dosea (mrem/yr)

RESRAD-Onsite Water Concentrationb (pCi/L)

DCF Value (mrem/y per pCi/L)

Am-241 1.90E-04 3.70E+00 5.14E-05 C-14 3.01E-03 1.38E+02 2.18E-05 Cm-243 4.53E-04 1.70E+00 2.67E-04 Cm-244 6.58E-04 1.67E+00 3.93E-04 Co-60 1.42E-04 2.30E+01 6.18E-06 Cs-137 1.87E-04 6.14E+00 3.04E-05 Eu-152 5.14E-04 1.46E+01 3.52E-05 Eu-154 4.75E-04 1.42E+01 3.34E-05 Fe-55 8.40E-08 2.41E+00 3.49E-08 H-3 6.14E-09 5.63E+02 1.09E-11 Mn-54 2.32E-04 2.66E+00 8.71E-05 Nb-94 1.38E-06 2.62E-01 5.26E-06 Ni-63 4.05E-07 3.45E+01 1.17E-08 Np-237 6.70E-03 1.52E+02 4.42E-05 Pu-238 1.33E-04 6.32E+00 2.11E-05 Pu-239 1.49E-04 6.37E+00 2.34E-05 Pu-240 1.49E-04 6.37E+00 2.34E-05 Pu-241 3.10E-06 6.03E+00 5.14E-07 Sb-125 4.38E-05 1.26E+02 3.48E-07 Sr-90 2.55E-04 1.27E+02 2.00E-06 Tc-99 3.37E-06 5.74E+02 5.87E-09 a Maximum probabilistic dose via ingestion of aquatic food at 1 year.

b Water concentration at 1 year (corresponding to time of dose).

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 7 of 15 References

1. Oyster Creek 100 Year Land Use Outlook - Categorization and Justification, GHD, February 9, 2024
2. NEI-07-07, Industry Groundwater Protection Initiative, Nuclear Energy Institute

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 8 of 15 Attachment A: RESRAD-Onsite Results Supporting Table 2 Am-241 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 12:10 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Am241 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_AM-241_DCGL\BFM-IU_AM241_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Am-241 Min 1.87E-05 5.69E-05 1.33E-04 1.77E-04 1.52E-04 8.98E-05 1.99E-05 1.02E-07 Max 1.30E-04 1.90E-04 1.89E-04 1.86E-04 1.76E-04 1.47E-04 8.65E-05 1.36E-05 Avg 5.90E-05 1.58E-04 1.88E-04 1.82E-04 1.67E-04 1.22E-04 5.18E-05 3.36E-06 Std 1.84E-05 2.81E-05 2.31E-06 1.82E-06 5.08E-06 1.24E-05 1.55E-05 3.07E-06 ALL Min 1.87E-05 5.69E-05 1.33E-04 1.77E-04 1.52E-04 8.98E-05 1.99E-05 1.02E-07 Max 1.30E-04 1.90E-04 1.89E-04 1.86E-04 1.76E-04 1.47E-04 8.65E-05 1.36E-05 Avg 5.90E-05 1.58E-04 1.88E-04 1.82E-04 1.67E-04 1.22E-04 5.18E-05 3.36E-06 Std 1.84E-05 2.81E-05 2.31E-06 1.82E-06 5.08E-06 1.24E-05 1.55E-05 3.07E-06 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Am-241 3.697E+00 2.553E-01 1.224E+00 1.342E+00 1.342E+00 1.380E-02 1.330E-03 1.039E-03 3.463E-02 Np-237 5.225E-05 3.504E-06 1.729E-05 1.582E-05 1.677E-05 3.555E-06 4.631E-08 2.277E-08 3.038E-07 Th-229 5.254E-18 4.543E-18 2.901E-18 9.158E-17 1.004E-16 5.375E-18 4.865E-19 2.839E-18 1.421E-17 U-233 1.395E-11 1.481E-12 4.802E-12 1.199E-11 1.293E-11 1.341E-12 1.759E-12 5.163E-15 4.498E-14

  • Concentrations are at consumption time and include radioactive decay and ingrowth during storage time.

For livestock fodder, consumption time is t minus meat or milk storage time.

C-14 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 12:50 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_C14_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_C-14_DCGL\BFM-IU_C14_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 C-14 Min 2.58E-03 2.15E-03 1.33E-03 2.45E-04 1.96E-06 8.93E-14 0.00E+00 0.00E+00 Max 2.99E-03 3.01E-03 2.76E-03 2.04E-03 8.63E-04 4.22E-05 7.63E-09 6.04E-22 Avg 2.82E-03 2.65E-03 2.09E-03 9.74E-04 1.58E-04 1.56E-06 4.60E-11 5.03E-25 Std 6.89E-05 1.69E-04 3.08E-04 4.17E-04 1.76E-04 4.33E-06 3.48E-10 1.50E-23 ALL Min 2.58E-03 2.15E-03 1.33E-03 2.45E-04 1.96E-06 8.93E-14 0.00E+00 0.00E+00 Max 2.99E-03 3.01E-03 2.76E-03 2.04E-03 8.63E-04 4.22E-05 7.63E-09 6.04E-22 Avg 2.82E-03 2.65E-03 2.09E-03 9.74E-04 1.58E-04 1.56E-06 4.60E-11 5.03E-25 Std 6.89E-05 1.69E-04 3.08E-04 4.17E-04 1.76E-04 4.33E-06 3.48E-10 1.50E-23 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg C-14 1.382E+02 1.910E+01 6.262E+00 3.848E+00 2.762E+00 1.519E+02 2.337E+02 1.062E+02 1.933E+01 Cm-243 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 16:09 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Cm243_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_CM-243_DCGL\BFM-IU_CM243_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Cm-243 Min 9.30E-10 5.29E-09 1.65E-08 4.93E-08 1.03E-07 1.09E-07 1.64E-08 1.73E-11 Max 4.07E-04 4.53E-04 8.05E-04 6.74E-04 4.06E-04 6.86E-05 6.38E-07 3.62E-08 Avg 1.19E-05 2.15E-05 2.90E-05 3.40E-05 2.61E-05 5.38E-06 8.92E-08 4.99E-09 Std 2.67E-05 3.88E-05 4.65E-05 4.30E-05 2.78E-05 5.00E-06 4.37E-08 6.26E-09 ALL Min 9.30E-10 5.29E-09 1.65E-08 4.93E-08 1.03E-07 1.09E-07 1.64E-08 1.73E-11 Max 4.07E-04 4.53E-04 8.05E-04 6.74E-04 4.06E-04 6.86E-05 6.38E-07 3.62E-08 Avg 1.19E-05 2.15E-05 2.90E-05 3.40E-05 2.61E-05 5.38E-06 8.92E-08 4.99E-09 Std 2.67E-05 3.88E-05 4.65E-05 4.30E-05 2.78E-05 5.00E-06 4.37E-08 6.26E-09

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 9 of 15 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Ac-227 4.852E-20 2.638E-21 1.582E-20 1.056E-20 8.267E-21 1.356E-22 1.620E-22 3.286E-20 2.190E-18 Am-243 2.228E-07 1.582E-08 7.391E-08 8.377E-08 8.790E-08 8.430E-10 8.114E-11 2.275E-11 7.585E-10 Cm-243 1.697E+00 1.172E-01 5.618E-01 6.165E-01 6.157E-01 2.534E-03 6.107E-04 3.774E-05 1.258E-03 Pa-231 8.384E-20 9.746E-21 2.908E-20 1.171E-19 1.246E-19 5.192E-20 8.793E-22 1.863E-20 2.049E-19 Pu-239 1.807E-04 1.214E-05 5.971E-05 5.619E-05 5.957E-05 1.241E-06 3.216E-08 5.469E-08 1.829E-07 U-235 1.266E-13 8.558E-15 4.185E-14 3.773E-14 4.218E-14 2.865E-15 1.348E-14 1.727E-17 1.009E-16 Cm-244 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 22:02 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Cm244_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_CM-244_DCGL\BFM-IU_CM244_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Cm-244 Min 2.59E-09 1.30E-08 5.09E-08 1.63E-07 2.99E-07 2.01E-07 2.02E-08 1.01E-11 Max 6.24E-04 6.58E-04 6.08E-04 4.61E-04 3.67E-04 2.20E-05 2.52E-07 7.06E-08 Avg 9.84E-06 1.72E-05 2.21E-05 2.36E-05 1.40E-05 1.30E-06 1.12E-07 8.89E-09 Std 2.55E-05 3.39E-05 3.56E-05 3.01E-05 1.65E-05 1.04E-06 5.24E-08 1.24E-08 ALL Min 2.59E-09 1.30E-08 5.09E-08 1.63E-07 2.99E-07 2.01E-07 2.02E-08 1.01E-11 Max 6.24E-04 6.58E-04 6.08E-04 4.61E-04 3.67E-04 2.20E-05 2.52E-07 7.06E-08 Avg 9.84E-06 1.72E-05 2.21E-05 2.36E-05 1.40E-05 1.30E-06 1.12E-07 8.89E-09 Std 2.55E-05 3.39E-05 3.56E-05 3.01E-05 1.65E-05 1.04E-06 5.24E-08 1.24E-08 ALL is total pathway dose summed for all nuclides. Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Cm-244 1.673E+00 1.156E-01 5.540E-01 6.084E-01 6.072E-01 2.499E-03 6.022E-04 3.722E-05 1.241E-03 Pu-240 6.622E-04 4.448E-05 2.188E-04 2.061E-04 2.184E-04 4.549E-06 1.179E-07 2.007E-07 6.713E-07 Ra-228 5.497E-26 -1.731E-26 -2.293E-27 3.057E-25 2.116E-24 2.671E-26 1.125E-25 7.713E-29 3.876E-28 Th-228 -2.309E-25 -1.163E-25 -1.518E-25 5.732E-27 5.064E-24 5.039E-28 1.136E-27 6.280E-28 3.140E-27 Th-232 5.252E-23 4.625E-24 1.770E-23 3.089E-23 4.485E-23 1.209E-24 2.502E-25 8.235E-27 4.287E-26 U-236 1.391E-11 8.895E-13 4.582E-12 3.429E-12 3.868E-12 2.906E-13 1.456E-12 1.798E-15 1.079E-14 C-60 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 13:47 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Co60_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_CO-60_DCGL\BFM-IU_CO60_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Co-60 Min 2.29E-07 2.32E-07 1.72E-07 5.80E-08 2.22E-09 1.98E-14 1.14E-29 0.00E+00 Max 1.25E-04 1.42E-04 1.06E-04 3.79E-05 2.01E-06 6.96E-11 2.88E-23 0.00E+00 Avg 1.00E-05 9.96E-06 7.34E-06 2.53E-06 1.23E-07 3.59E-12 8.85E-25 0.00E+00 Std 1.17E-05 1.16E-05 8.57E-06 2.98E-06 1.50E-07 5.43E-12 2.21E-24 0.00E+00 ALL Min 2.29E-07 2.32E-07 1.72E-07 5.80E-08 2.22E-09 1.98E-14 1.14E-29 0.00E+00 Max 1.25E-04 1.42E-04 1.06E-04 3.79E-05 2.01E-06 6.96E-11 2.88E-23 0.00E+00 Avg 1.00E-05 9.96E-06 7.34E-06 2.53E-06 1.23E-07 3.59E-12 8.85E-25 0.00E+00 Std 1.17E-05 1.16E-05 8.57E-06 2.98E-06 1.50E-07 5.43E-12 2.21E-24 0.00E+00 Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Co-60 2.297E+01 1.629E+00 7.668E+00 8.446E+00 8.379E+00 3.440E+01 8.274E+00 1.053E-01 7.023E-02 Cs-137 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 14:01 Page 13

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 10 of 15 Probabilistic results summary : OCS BFM_Industrial Use_IR_Cs137_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_CS-137_DCGL\BFM-IU_CS137_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Cs-137 Min 1.02E-06 1.56E-06 1.47E-06 1.19E-06 6.58E-07 8.21E-08 2.15E-10 3.64E-20 Max 1.42E-04 1.87E-04 1.77E-04 1.48E-04 8.85E-05 1.47E-05 9.27E-08 2.25E-15 Avg 4.53E-05 8.65E-05 8.37E-05 6.88E-05 3.93E-05 5.61E-06 2.31E-08 1.97E-16 Std 2.35E-05 3.87E-05 3.72E-05 3.06E-05 1.77E-05 2.72E-06 1.63E-08 3.13E-16 ALL Min 1.02E-06 1.56E-06 1.47E-06 1.19E-06 6.58E-07 8.21E-08 2.15E-10 3.64E-20 Max 1.42E-04 1.87E-04 1.77E-04 1.48E-04 8.85E-05 1.47E-05 9.27E-08 2.25E-15 Avg 4.53E-05 8.65E-05 8.37E-05 6.88E-05 3.93E-05 5.61E-06 2.31E-08 1.97E-16 Std 2.35E-05 3.87E-05 3.72E-05 3.06E-05 1.77E-05 2.72E-06 1.63E-08 3.13E-16 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Cs-137 6.143E+00 4.298E-01 2.042E+00 2.236E+00 2.233E+00 1.377E+01 8.846E+00 1.885E-01 9.427E-03 Eu-152 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 14:14 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Eu152_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_EU-152_DCGL\BFM-IU_EU152_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Eu-152 Min 1.03E-08 1.17E-08 1.03E-08 6.74E-09 1.99E-09 2.76E-11 5.98E-17 0.00E+00 Max 3.51E-04 5.14E-04 4.49E-04 2.78E-04 7.08E-05 9.40E-07 9.22E-12 1.86E-19 Avg 5.75E-06 6.93E-06 6.10E-06 3.89E-06 1.08E-06 1.30E-08 6.33E-14 3.40E-21 Std 1.58E-05 1.98E-05 1.74E-05 1.10E-05 3.01E-06 3.72E-08 2.73E-13 1.33E-20 ALL Min 1.03E-08 1.17E-08 1.03E-08 6.74E-09 1.99E-09 2.76E-11 5.98E-17 0.00E+00 Max 3.51E-04 5.14E-04 4.49E-04 2.78E-04 7.08E-05 9.40E-07 9.22E-12 1.86E-19 Avg 5.75E-06 6.93E-06 6.10E-06 3.89E-06 1.08E-06 1.30E-08 6.33E-14 3.40E-21 Std 1.58E-05 1.98E-05 1.74E-05 1.10E-05 3.01E-06 3.72E-08 2.73E-13 1.33E-20 Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Eu-152 1.459E+01 1.009E+00 4.833E+00 5.320E+00 5.303E+00 2.182E+00 1.313E-01 1.115E-02 2.230E-01 Gd-152 3.047E-13 2.039E-14 1.007E-13 9.370E-14 9.903E-14 4.192E-14 1.082E-15 1.114E-16 4.447E-15 Eu-154 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 14:26 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Eu154_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_EU-154_DCGL\BFM-IU_EU154_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Eu-154 Min 7.23E-08 1.04E-07 8.59E-08 4.35E-08 6.23E-09 6.93E-12 8.24E-21 0.00E+00 Max 3.96E-04 4.75E-04 3.96E-04 2.11E-04 3.49E-05 7.56E-08 1.85E-15 0.00E+00 Avg 8.28E-06 9.77E-06 8.15E-06 4.31E-06 7.05E-07 1.31E-09 2.91E-17 0.00E+00 Std 2.19E-05 2.62E-05 2.19E-05 1.16E-05 1.91E-06 3.72E-09 9.52E-17 0.00E+00 ALL Min 7.23E-08 1.04E-07 8.59E-08 4.35E-08 6.23E-09 6.93E-12 8.24E-21 0.00E+00 Max 3.96E-04 4.75E-04 3.96E-04 2.11E-04 3.49E-05 7.56E-08 1.85E-15 0.00E+00 Avg 8.28E-06 9.77E-06 8.15E-06 4.31E-06 7.05E-07 1.31E-09 2.91E-17 0.00E+00 Std 2.19E-05 2.62E-05 2.19E-05 1.16E-05 1.91E-06 3.72E-09 9.52E-17 0.00E+00 Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Eu-154 1.421E+01 9.821E-01 4.705E+00 5.187E+00 5.163E+00 2.124E+00 1.278E-01 1.085E-02 2.171E-01

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 11 of 15 Fe-55 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 14:38 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Fe55_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_FE-55_DCGL\BFM-IU_FE55_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Fe-55 Min 1.40E-08 3.41E-08 4.72E-08 7.91E-09 4.19E-11 4.51E-19 0.00E+00 0.00E+00 Max 6.06E-08 8.40E-08 5.02E-08 8.27E-09 4.78E-11 7.06E-19 0.00E+00 0.00E+00 Avg 3.15E-08 7.00E-08 5.00E-08 8.14E-09 4.57E-11 6.06E-19 0.00E+00 0.00E+00 Std 7.64E-09 1.05E-08 1.60E-10 6.86E-11 1.17E-12 5.19E-20 0.00E+00 0.00E+00 ALL Min 1.40E-08 3.41E-08 4.72E-08 7.91E-09 4.19E-11 4.51E-19 0.00E+00 0.00E+00 Max 6.06E-08 8.40E-08 5.02E-08 8.27E-09 4.78E-11 7.06E-19 0.00E+00 0.00E+00 Avg 3.15E-08 7.00E-08 5.00E-08 8.14E-09 4.57E-11 6.06E-19 0.00E+00 0.00E+00 Std 7.64E-09 1.05E-08 1.60E-10 6.86E-11 1.17E-12 5.19E-20 0.00E+00 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Fe-55 2.409E+00 1.664E-01 7.977E-01 8.867E-01 8.749E-01 3.599E+00 1.301E-01 4.432E-03 7.091E-02 H-3 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 14:52 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_H3_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_H-3_DCGL\BFM-IU_H3_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 H-3 Min 1.08E-08 2.40E-09 1.48E-11 2.73E-19 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Max 2.82E-08 6.14E-09 7.05E-10 4.64E-13 4.80E-22 0.00E+00 0.00E+00 0.00E+00 Avg 1.82E-08 3.93E-09 1.68E-10 8.10E-15 6.71E-25 0.00E+00 0.00E+00 0.00E+00 Std 2.76E-09 4.47E-10 8.38E-11 2.44E-14 1.23E-23 0.00E+00 0.00E+00 0.00E+00 ALL Min 1.08E-08 2.40E-09 1.48E-11 2.73E-19 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Max 2.82E-08 6.14E-09 7.05E-10 4.64E-13 4.80E-22 0.00E+00 0.00E+00 0.00E+00 Avg 1.82E-08 3.93E-09 1.68E-10 8.10E-15 6.71E-25 0.00E+00 0.00E+00 0.00E+00 Std 2.76E-09 4.47E-10 8.38E-11 2.44E-14 1.23E-23 0.00E+00 0.00E+00 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg H-3 5.633E+02 3.677E+01 4.813E+01 2.321E+01 2.131E+01 1.853E+02 3.953E+02 9.555E-03 9.555E-03 Mn-54 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:07 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_Mn54_DCGL File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_MN-54_DCGL\BFM-IU_MN54_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Mn-54 Min 8.50E-08 7.65E-08 1.50E-08 5.00E-11 4.20E-18 0.00E+00 0.00E+00 0.00E+00 Max 2.49E-04 2.32E-04 4.54E-05 1.52E-07 1.28E-14 0.00E+00 0.00E+00 0.00E+00 Avg 3.88E-06 3.93E-06 7.96E-07 2.65E-09 2.22E-16 0.00E+00 0.00E+00 0.00E+00 Std 7.40E-06 6.77E-06 1.33E-06 4.45E-09 3.75E-16 0.00E+00 0.00E+00 0.00E+00 ALL Min 8.50E-08 7.65E-08 1.50E-08 5.00E-11 4.20E-18 0.00E+00 0.00E+00 0.00E+00 Max 2.49E-04 2.32E-04 4.54E-05 1.52E-07 1.28E-14 0.00E+00 0.00E+00 0.00E+00 Avg 3.88E-06 3.93E-06 7.96E-07 2.65E-09 2.22E-16 0.00E+00 0.00E+00 0.00E+00 Std 7.40E-06 6.77E-06 1.33E-06 4.45E-09 3.75E-16 0.00E+00 0.00E+00 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Mn-54 2.663E+00 2.020E-01 9.082E-01 1.019E+00 9.771E-01 9.973E-02 1.439E-01 1.604E-02 3.610E+00

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 12 of 15 Nb-94 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:16 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Nb94 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_NB-94_DCGL\BFM-IU_DCGL_NB94.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Nb-94 Min 1.22E-11 3.76E-11 8.83E-11 2.66E-10 4.40E-10 4.35E-10 4.22E-10 3.81E-10 Max 6.08E-07 1.38E-06 3.19E-06 3.98E-06 3.97E-06 3.92E-06 3.77E-06 3.31E-06 Avg 1.76E-08 4.43E-08 7.47E-08 1.13E-07 1.37E-07 1.45E-07 1.42E-07 1.25E-07 Std 4.67E-08 1.06E-07 1.65E-07 2.19E-07 2.36E-07 2.40E-07 2.32E-07 2.05E-07 ALL Min 1.22E-11 3.76E-11 8.83E-11 2.66E-10 4.40E-10 4.35E-10 4.22E-10 3.81E-10 Max 6.08E-07 1.38E-06 3.19E-06 3.98E-06 3.97E-06 3.92E-06 3.77E-06 3.31E-06 Avg 1.76E-08 4.43E-08 7.47E-08 1.13E-07 1.37E-07 1.45E-07 1.42E-07 1.25E-07 Std 4.67E-08 1.06E-07 1.65E-07 2.19E-07 2.36E-07 2.40E-07 2.32E-07 2.05E-07 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Nb-94 2.623E-01 1.817E-02 8.694E-02 9.520E-02 9.520E-02 5.877E-06 9.442E-05 1.322E-04 4.406E-05 Ni-63 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:25 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Ni63 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_NI-63_DCGL\BFM-IU_NI63_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Ni-63 Min 3.00E-07 3.70E-07 3.23E-07 1.99E-07 5.00E-08 3.97E-10 3.96E-16 0.00E+00 Max 3.89E-07 4.05E-07 3.91E-07 3.47E-07 2.47E-07 7.51E-08 2.51E-09 1.70E-14 Avg 3.68E-07 3.92E-07 3.66E-07 2.87E-07 1.48E-07 1.88E-08 1.62E-10 1.48E-16 Std 1.34E-08 5.78E-09 1.26E-08 2.95E-08 4.34E-08 1.66E-08 3.32E-10 8.11E-16 ALL Min 3.00E-07 3.70E-07 3.23E-07 1.99E-07 5.00E-08 3.97E-10 3.96E-16 0.00E+00 Max 3.89E-07 4.05E-07 3.91E-07 3.47E-07 2.47E-07 7.51E-08 2.51E-09 1.70E-14 Avg 3.68E-07 3.92E-07 3.66E-07 2.87E-07 1.48E-07 1.88E-08 1.62E-10 1.48E-16 Std 1.34E-08 5.78E-09 1.26E-08 2.95E-08 4.34E-08 1.66E-08 3.32E-10 8.11E-16 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Ni-63 3.451E+01 2.425E+00 1.149E+01 1.261E+01 1.258E+01 1.293E+01 1.243E+02 5.276E-02 5.276E-02 Np-237 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 07:29 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Np237 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_NP-237_DCGL\BFM-IU_NP237.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Np-237 Min 5.64E-03 4.61E-03 2.71E-03 4.13E-04 1.91E-06 2.71E-13 2.59E-27 0.00E+00 Max 6.66E-03 6.70E-03 6.11E-03 4.42E-03 1.76E-03 6.95E-05 1.71E-08 1.76E-08 Avg 6.24E-03 5.78E-03 4.46E-03 1.93E-03 2.71E-04 1.92E-06 2.35E-10 1.58E-10 Std 1.69E-04 4.10E-04 7.27E-04 9.12E-04 3.31E-04 5.80E-06 8.37E-10 6.42E-10 ALL Min 5.64E-03 4.61E-03 2.71E-03 4.13E-04 1.91E-06 2.71E-13 2.59E-27 0.00E+00 Max 6.66E-03 6.70E-03 6.11E-03 4.42E-03 1.76E-03 6.95E-05 1.71E-08 1.76E-08 Avg 6.24E-03 5.78E-03 4.46E-03 1.93E-03 2.71E-04 1.92E-06 2.35E-10 1.58E-10 Std 1.69E-04 4.10E-04 7.27E-04 9.12E-04 3.31E-04 5.80E-06 8.37E-10 6.42E-10 ALL is total pathway dose summed for all nuclides.

1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 07:29 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Np237 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_NP-237_DCGL\BFM-IU_NP237.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 13 of 15 (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Np-237 Min 5.64E-03 4.61E-03 2.71E-03 4.13E-04 1.91E-06 2.71E-13 2.59E-27 0.00E+00 Max 6.66E-03 6.70E-03 6.11E-03 4.42E-03 1.76E-03 6.95E-05 1.71E-08 1.76E-08 Avg 6.24E-03 5.78E-03 4.46E-03 1.93E-03 2.71E-04 1.92E-06 2.35E-10 1.58E-10 Std 1.69E-04 4.10E-04 7.27E-04 9.12E-04 3.31E-04 5.80E-06 8.37E-10 6.42E-10 ALL Min 5.64E-03 4.61E-03 2.71E-03 4.13E-04 1.91E-06 2.71E-13 2.59E-27 0.00E+00 Max 6.66E-03 6.70E-03 6.11E-03 4.42E-03 1.76E-03 6.95E-05 1.71E-08 1.76E-08 Avg 6.24E-03 5.78E-03 4.46E-03 1.93E-03 2.71E-04 1.92E-06 2.35E-10 1.58E-10 Std 1.69E-04 4.10E-04 7.27E-04 9.12E-04 3.31E-04 5.80E-06 8.37E-10 6.42E-10 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Np-237 1.516E+02 1.059E+01 5.029E+01 5.634E+01 5.595E+01 1.146E+01 1.367E-01 6.992E-02 9.323E-01 Th-229 3.508E-10 3.529E-11 1.190E-10 4.076E-10 4.273E-10 1.976E-11 1.719E-12 3.015E-10 1.508E-09 U-233 3.871E-05 4.359E-06 1.339E-05 4.216E-05 4.261E-05 4.346E-06 5.115E-06 1.537E-08 1.352E-07 Pu-238 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 07:43 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Pu238 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_PU-238_DCGL\BFM-IU_PU238_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Pu-238 Min 2.66E-05 8.04E-05 1.27E-04 1.11E-04 7.65E-05 2.07E-05 4.98E-07 1.88E-12 Max 1.08E-04 1.33E-04 1.31E-04 1.22E-04 1.01E-04 5.15E-05 7.55E-06 6.55E-08 Avg 6.77E-05 1.30E-04 1.29E-04 1.18E-04 9.13E-05 3.76E-05 3.21E-06 1.80E-09 Std 1.66E-05 6.40E-06 7.11E-07 2.11E-06 4.85E-06 6.56E-06 1.61E-06 2.95E-09 ALL Min 2.66E-05 8.04E-05 1.27E-04 1.11E-04 7.65E-05 2.07E-05 4.98E-07 1.88E-12 Max 1.08E-04 1.33E-04 1.31E-04 1.22E-04 1.01E-04 5.15E-05 7.55E-06 6.55E-08 Avg 6.77E-05 1.30E-04 1.29E-04 1.18E-04 9.13E-05 3.76E-05 3.21E-06 1.80E-09 Std 1.66E-05 6.40E-06 7.11E-07 2.11E-06 4.85E-06 6.56E-06 1.61E-06 2.95E-09 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Pb-210 2.753E-14 4.381E-15 1.018E-14 1.975E-15 2.677E-15 2.763E-15 1.519E-15 7.630E-14 2.544E-14 Po-210 1.815E-14 5.536E-15 7.829E-15 3.912E-15 5.701E-15 2.195E-14 1.392E-15 5.736E-14 1.095E-11 Pu-238 6.317E+00 4.364E-01 2.092E+00 2.295E+00 2.293E+00 4.719E-02 1.137E-03 2.905E-03 9.684E-03 Ra-226 1.749E-15 3.330E-16 6.674E-16 6.231E-16 7.198E-16 2.837E-16 3.573E-16 9.036E-16 4.518E-15 Th-230 1.856E-11 1.778E-12 6.320E-12 1.345E-11 1.457E-11 4.735E-13 8.600E-14 2.777E-14 1.395E-13 U-234 2.543E-05 1.738E-06 8.416E-06 8.399E-06 8.875E-06 6.104E-07 2.728E-06 3.975E-09 2.343E-08 Pu-239 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 14:51 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Pu239 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_PU-239_DCGL\BFM-IU_DCGL_PU239.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Pu-239 Min 2.98E-05 9.11E-05 1.44E-04 1.34E-04 1.10E-04 5.39E-05 7.05E-06 5.71E-09 Max 1.19E-04 1.49E-04 1.48E-04 1.47E-04 1.42E-04 1.25E-04 8.85E-05 2.62E-05 Avg 7.54E-05 1.45E-04 1.47E-04 1.42E-04 1.28E-04 9.16E-05 3.78E-05 3.27E-06 Std 1.84E-05 7.53E-06 8.07E-07 2.52E-06 6.80E-06 1.60E-05 1.90E-05 4.70E-06 ALL Min 2.98E-05 9.11E-05 1.44E-04 1.34E-04 1.10E-04 5.39E-05 7.05E-06 5.71E-09 Max 1.19E-04 1.49E-04 1.48E-04 1.47E-04 1.42E-04 1.25E-04 8.85E-05 2.62E-05 Avg 7.54E-05 1.45E-04 1.47E-04 1.42E-04 1.28E-04 9.16E-05 3.78E-05 3.27E-06 Std 1.84E-05 7.53E-06 8.07E-07 2.52E-06 6.80E-06 1.60E-05 1.90E-05 4.70E-06 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Ac-227 1.492E-16 8.654E-18 4.874E-17 5.162E-17 4.530E-17 7.799E-18 5.221E-19 9.873E-17 6.580E-15

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 14 of 15 Pa-231 5.815E-15 8.553E-16 2.086E-15 8.728E-15 9.328E-15 4.503E-15 6.230E-17 5.704E-17 6.247E-16 Pu-239 6.367E+00 4.398E-01 2.108E+00 2.312E+00 2.311E+00 4.756E-02 1.146E-03 2.928E-03 9.761E-03 U-235 8.870E-09 6.062E-10 2.935E-09 2.928E-09 3.095E-09 2.128E-10 9.513E-10 1.386E-12 8.171E-12 Pu-240 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 15:35 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Pu240 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_PU-240_DCGL\BFM-IU_DCGL_PU240.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Pu-240 Min 2.48E-05 7.56E-05 1.44E-04 1.34E-04 1.09E-04 5.25E-05 6.55E-06 4.49E-09 Max 1.20E-04 1.49E-04 1.48E-04 1.47E-04 1.41E-04 1.24E-04 8.57E-05 2.34E-05 Avg 7.54E-05 1.45E-04 1.47E-04 1.42E-04 1.28E-04 9.09E-05 3.69E-05 3.02E-06 Std 1.84E-05 7.51E-06 8.06E-07 2.52E-06 6.79E-06 1.58E-05 1.86E-05 4.33E-06 ALL Min 2.48E-05 7.56E-05 1.44E-04 1.34E-04 1.09E-04 5.25E-05 6.55E-06 4.49E-09 Max 1.20E-04 1.49E-04 1.48E-04 1.47E-04 1.41E-04 1.24E-04 8.57E-05 2.34E-05 Avg 7.54E-05 1.45E-04 1.47E-04 1.42E-04 1.28E-04 9.09E-05 3.69E-05 3.02E-06 Std 1.84E-05 7.51E-06 8.06E-07 2.52E-06 6.79E-06 1.58E-05 1.86E-05 4.33E-06 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Pu-240 6.366E+00 4.398E-01 2.108E+00 2.312E+00 2.311E+00 4.756E-02 1.146E-03 2.928E-03 9.760E-03 Ra-228 9.689E-21 9.575E-22 3.294E-21 9.273E-21 1.114E-20 1.138E-21 2.142E-21 7.759E-25 3.922E-24 Th-228 1.038E-20 5.292E-22 3.346E-21 2.103E-21 5.459E-21 7.416E-23 1.170E-23 2.021E-24 1.010E-23 Th-232 1.062E-18 1.017E-19 3.616E-19 7.696E-19 8.369E-19 2.715E-20 4.937E-21 1.557E-22 8.149E-22 U-236 2.666E-07 1.822E-08 8.822E-08 8.801E-08 9.302E-08 6.397E-09 2.859E-08 4.167E-11 2.456E-10 Pu-241 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/11/2024 13:55 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Pu241 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_PU-241_DCGL\BFM-IU_DCGL_PU241.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Pu-241 Min 4.91E-07 1.54E-06 3.27E-06 3.86E-06 4.27E-06 2.83E-06 6.30E-07 3.24E-09 Max 2.39E-06 3.10E-06 3.39E-06 4.16E-06 5.19E-06 4.95E-06 2.93E-06 4.62E-07 Avg 1.47E-06 3.00E-06 3.35E-06 4.05E-06 4.83E-06 4.03E-06 1.72E-06 1.12E-07 Std 3.63E-07 1.68E-07 1.71E-08 6.15E-08 1.95E-07 4.67E-07 5.37E-07 1.04E-07 ALL Min 4.91E-07 1.54E-06 3.27E-06 3.86E-06 4.27E-06 2.83E-06 6.30E-07 3.24E-09 Max 2.39E-06 3.10E-06 3.39E-06 4.16E-06 5.19E-06 4.95E-06 2.93E-06 4.62E-07 Avg 1.47E-06 3.00E-06 3.35E-06 4.05E-06 4.83E-06 4.03E-06 1.72E-06 1.12E-07 Std 3.63E-07 1.68E-07 1.71E-08 6.15E-08 1.95E-07 4.67E-07 5.37E-07 1.04E-07 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Am-241 5.798E-03 4.112E-04 1.923E-03 2.173E-03 2.279E-03 2.507E-05 2.106E-06 2.240E-06 7.210E-05 Np-237 4.325E-08 2.794E-09 1.427E-08 1.086E-08 1.222E-08 2.680E-09 3.778E-11 1.800E-11 2.402E-10 Pu-241 6.030E+00 4.165E-01 1.997E+00 2.195E+00 2.189E+00 4.504E-02 1.085E-03 2.774E-03 9.248E-03 Th-229 1.619E-17 1.122E-18 5.357E-18 5.837E-18 6.934E-18 1.254E-19 1.501E-20 7.950E-17 3.975E-16 U-233 4.008E-15 7.127E-16 1.487E-15 6.663E-15 7.576E-15 8.532E-16 6.319E-16 4.819E-17 3.002E-16 Sb-125 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:35 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Sb125 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_SB-125_DCGL\BFM-IU_DCGLSB125.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Sb-125 Min 2.21E-07 4.98E-07 5.92E-07 2.87E-08 3.95E-13 2.87E-30 0.00E+00 0.00E+00 Max 4.79E-05 4.38E-05 2.24E-05 2.90E-06 4.01E-09 1.71E-18 0.00E+00 0.00E+00 Avg 7.73E-06 6.57E-06 3.19E-06 2.33E-07 1.96E-10 2.64E-20 0.00E+00 0.00E+00 Std 2.58E-06 2.42E-06 1.68E-06 2.02E-07 3.00E-10 9.99E-20 0.00E+00 0.00E+00 ALL Min 2.21E-07 4.98E-07 5.92E-07 2.87E-08 3.95E-13 2.87E-30 0.00E+00 0.00E+00

Oyster Creek Groundwater TSD-24-081 Dose Calculation Methodology to Support Rev. 0 the License Termination Plan 15 of 15 Max 4.79E-05 4.38E-05 2.24E-05 2.90E-06 4.01E-09 1.71E-18 0.00E+00 0.00E+00 Avg 7.73E-06 6.57E-06 3.19E-06 2.33E-07 1.96E-10 2.64E-20 0.00E+00 0.00E+00 Std 2.58E-06 2.42E-06 1.68E-06 2.02E-07 3.00E-10 9.99E-20 0.00E+00 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Sb-125 1.259E+02 8.772E+00 4.175E+01 4.753E+01 4.657E+01 9.535E+00 2.272E+00 1.939E-01 1.939E-02 Te-125m 6.392E-01 3.549E-01 3.351E-01 4.718E+00 4.623E+00 2.413E+00 1.824E-01 8.727E-03 1.325E-03 Sr-90 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:45 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Sr90 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_SR-90_DCGL\BFM-IU_DCGL_SR90.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Sr-90 Min 2.21E-04 1.79E-04 1.05E-04 1.61E-05 7.56E-08 5.37E-16 0.00E+00 0.00E+00 Max 2.58E-04 2.55E-04 2.24E-04 1.43E-04 3.95E-05 4.39E-07 1.15E-12 0.00E+00 Avg 2.44E-04 2.25E-04 1.73E-04 7.12E-05 7.91E-06 1.86E-08 7.36E-15 0.00E+00 Std 5.61E-06 1.36E-05 2.39E-05 2.87E-05 8.33E-06 4.72E-08 4.85E-14 0.00E+00 ALL Min 2.21E-04 1.79E-04 1.05E-04 1.61E-05 7.56E-08 5.37E-16 0.00E+00 0.00E+00 Max 2.58E-04 2.55E-04 2.24E-04 1.43E-04 3.95E-05 4.39E-07 1.15E-12 0.00E+00 Avg 2.44E-04 2.25E-04 1.73E-04 7.12E-05 7.91E-06 1.86E-08 7.36E-15 0.00E+00 Std 5.61E-06 1.36E-05 2.39E-05 2.87E-05 8.33E-06 4.72E-08 4.85E-14 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Sr-90 1.272E+02 9.677E+00 4.337E+01 4.754E+01 4.720E+01 7.700E+01 4.589E+01 1.172E-01 1.953E-01 Tc-99 1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 09/10/2024 15:54 Page 13 Probabilistic results summary : OCS BFM_Industrial Use_IR_DCGL_Tc99 File : C:\RESRAD_FAMILY\ONSITE\7.2\USERFILES\RESRAD OC FILES\OC_TC-99_DCGL\BFM-IU_TC99_DCGL.RAD 0 Probabilistic Dose vs Pathway(i): Fish Ingestion 0Nuclide DOSE(i,j,t), mrem/yr (j) t= 0.00E+00 1.00E+00 3.00E+00 1.00E+01 3.00E+01 1.00E+02 3.00E+02 1.00E+03 Tc-99 Min 3.15E-06 8.50E-07 2.89E-09 6.63E-18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Max 1.32E-05 3.37E-06 1.21E-06 7.38E-08 2.47E-11 1.68E-23 0.00E+00 0.00E+00 Avg 8.24E-06 1.82E-06 1.02E-07 2.49E-10 2.58E-14 1.21E-26 0.00E+00 0.00E+00 Std 1.45E-06 3.46E-07 1.19E-07 2.71E-09 6.80E-13 0.00E+00 0.00E+00 0.00E+00 ALL Min 3.15E-06 8.50E-07 2.89E-09 6.63E-18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Max 1.32E-05 3.37E-06 1.21E-06 7.38E-08 2.47E-11 1.68E-23 0.00E+00 0.00E+00 Avg 8.24E-06 1.82E-06 1.02E-07 2.49E-10 2.58E-14 1.21E-26 0.00E+00 0.00E+00 Std 1.45E-06 3.46E-07 1.19E-07 2.71E-09 6.80E-13 0.00E+00 0.00E+00 0.00E+00 ALL is total pathway dose summed for all nuclides.

Concentration of radionuclides in foodstuff media at t = 1.000E+00 years*

Drinking Nonleafy Leafy Fodder Fodder Meat Milk Fish Crustacea Water Vegetable Vegetable Meat Milk Radio-Nuclide pCi/L pCi/kg pCi/kg pCi/kg pCi/kg pCi/kg pCi/L pCi/kg pCi/kg Tc-99 5.738E+02 1.026E+02 2.693E+02 3.196E+02 2.927E+02 5.319E+00 1.083E+02 1.959E-01 4.899E-02

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