ML25345A153
| ML25345A153 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 12/11/2025 |
| From: | Holtec Decommissioning International, Radiation Safety & Control Services |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML25345A092 | List:
|
| References | |
| HDI 25-039 25-108, Rev 0 | |
| Download: ML25345A153 (0) | |
Text
Industrial Use Scenario with Open Drinking Water Pathway: An Assessment of Impact on BFM DCGLbp Values Technical Support Document No.25-108 Revision 0 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 Radiation Safety & Control Services, Inc 93 Ledge Road, Seabrook, NH 03874 1-800-525-8339 (603) 778-2871 (Outside USA) www.radsafety.com October 2, 2025 RSCS Radiation Safety & Control Services
RSCS TSD 25-108 Revision 0 Page 2 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Contents 1
Introduction......................................................................................................................... 3 2
Input and Calculations......................................................................................................... 4 3
References......................................................................................................................... 16
RSCS TSD 25-108 Revision 0 Page 3 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values 1 Introduction This report is an assessment of impact that an open drinking water exposure pathway under the Industrial Use (IU) scenario has on the DCGL values for buried pipes (DCGLbp).
RESRAD-Onsite v7.2 [1] was used to calculate probabilistic annual doses, which were then used develop DCGLbp values. The DCGLep values are radionuclide-specific, based on a site-specific suite of potential radionuclides-of-concern (ROCs) [2], and correspond to the NRC dose criteria established in 10CFR20.1403 (i.e., 25 mrem/y). Table 1 lists the ROCs and their progeny radionuclides (automatically accounts for by RESRAD-Onsite 7.2 with input for several of the ROCs).
Table 1: Potential Radionuclides of Concern Identified for the OCNGS Site ROC Progeny ROC Progeny 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 The IU scenario with an open drinking water pathway is considered a less likely but plausible exposure scenario for the OCNGS site for the following reasons:
The Lacey Ordinance #93-31, which 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.
The groundwater Classification Exception Area (CEA) delineated across a major portion of the site.
The open drinking water pathway for the IU scenario assumes that (i) Lacy Ordinance #93-31 and CEA delineation are ignored, (ii) untreated contaminated site groundwater (GW) is the sole source of drinking water available to the hypothetical receptor (a site industrial worker) while onsite, (iii) the GW used as drinking water is drawn from a well located at the downstream edge of the contamination zone (i.e., the
RSCS TSD 25-108 Revision 0 Page 4 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values point of highest groundwater contamination), (iv) the radioactive contamination levels in GW remain constant, and (v) the receptor ingests 478.5 liters of GW during an employment year.
The buried pipe (BP) scenario assumes an instantaneous release of residual internal surface radioactivity in 3 buried pipe systems (i.e., AOG Sump Drain piping, Torus Water Transfer piping, and Overboard Discharge piping) to soil. The resulting contaminated zone (CZ) is assumed equal in volume to the volume of the 3 piping systems. The modeling assumption places the contaminated volume entirely in the saturated zone. The physical pipe structures are assumed not to impede groundwater flow or migration of residual contamination. The modeling for the buried pipe scenario and development of the CZ is described in detail in ENG-OCS-016 [3]. The configuration of CZ is shown in Figure 1.
Figure 1: Conceptual Configuration of CZ for Embedded Pipes (note: not to scale)
The exposure pathways assumed open are:
Direct external radiation exposure Inhalation exposure Aquatic food ingestion exposure Inadvertent ingestion of contaminated soil Ingestion of GW as the source of drinking water 2 Input and Calculations Input for the well pumping rate was determined using the method found in NUREG/CR-7267 with consideration only to drinking water (annual volume obtained from NUREG/CR-7267 [4]).
3ft (0.91m) 2ft (0.61m) 2.5ft (0.76m)
CZ = 141.48m3 (assumed sand)
<------------------------------ 15.4m (= LPAF) ---------------------------------->
Conceptual Model for Buried Pipe DCGLs
<---cover, 1.52m --->
cover (assumed sand)
UZ above CZ: sand (minimum depth to GW 5ft (1.52m))
RSCS TSD 25-108 Revision 0 Page 5 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values GW Use Component GW Use (m3/y)
Household NA Livestock NA Irrigation Water NA Drinking Water 1.64 Total, m3/y 1.64 Excluding the input values for RESRAD-Onsite parameters required for an open drinking water pathway, the values and bases for RESRAD-Onsite parameters provided in Table 2 are from ENG-OCS-016.
Table 2. Input Values for RESRAD-Onsite Parameters Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway 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 Initial principal radionuclide (pCi/g)
P 2
D 1
Unit Value 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)
-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
RSCS TSD 25-108 Revision 0 Page 6 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 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 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 Calculation Times Time since placement of material (y)
P 3
D 0
Time for calculations (y)
P 3
D 0, 1, 3, 10, 30, 100, 300, 1000 RESRAD Default Contaminated Zone Area of contaminated zone (m2)
P 2
D 186.2 See calc 1A below Thickness of contaminated zone (m)
P 2
D 0.76 Largest diameter of buried pipe. See calc 1A below Length parallel to aquifer flow (m)
P 2
D 15.4 Set to diameter of CZ. See calc 1A below 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 Cover and Contaminated Zone Hydrological Data Cover depth (m)
P 2
D 1.52 3ft cap plus 2ft of UZ above SZ at 5ft.
RSCS TSD 25-108 Revision 0 Page 7 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 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 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.
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 Contaminated zone hydraulic conductivity (m/y)
P 2
D 2741 2017 Hydrogeologic Investigation Report 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.
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.c om/windstatistics/oyster_c reek_barnegat_bay 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
RSCS TSD 25-108 Revision 0 Page 8 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 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.
Runoff coefficient P
2 D
0.2 Value determined using methodology described in Data Collection Handbook and NUREG/CR-7267 Watershed area for nearby stream or pond (m2)
P 3
D 1.01E+08 NJ-GeoWeb (NJDEP BGIS)
Accuracy for water/soil computations 3
D 1.00E-03 RESRAD Default 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 Saturated zone field capacity P
3 D
0.18 Value based on site-specific soil type (sand); calculated using equation in NUREG/CR-7267 Saturated zone hydraulic conductivity (m/y)
P 1
D 2741 2017 Hydrogeologic Investigation Report 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 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.
RSCS TSD 25-108 Revision 0 Page 9 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 Model:
Nondispersion (ND) or Mass-Balance (MB)
P 3
D ND ND model recommended for contaminant areas
>1,000 m2 Well pumping rate (m3/y)
P 2
D 1.64 Unsaturated Zone Hydrological Data Number of unsaturated zone strata P
3 D
0 UZ above CZ and is assumed part of cover.
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 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 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 Fraction of time spent outdoors B
3 D
0.2 Fraction of calendar year assuming 7h/work day for outside tasks Shape factor
- flag, external gamma P
3 D
Circular Circular contaminated zone assumed Ingestion, Dietary
- Fruits, vegetables, grain consumption (kg/y)
B 2
D N/A Input not required - plant ingestion pathway inactive Leafy vegetable consumption (kg/y)
B 3
D N/A Input not required - plant ingestion pathway inactive Milk consumption (L/y)
B 2
D N/A Input not required - milk ingestion pathway inactive Meat and poultry consumption (kg/y)
B 3
D N/A Input not required - meat ingestion pathway inactive Fish consumption (kg/y)
B 3
D 20.6 NUREG/CR-5512, Vol. 3
RSCS TSD 25-108 Revision 0 Page 10 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 Other seafood consumption (kg/y)
B 3
D 0.9 RESRAD Default Soil ingestion rate (g/yr)
B 2
D Triangular NUREG/CR-7267 Drinking water intake (L/y)
B 2
D 478.5 NUREG/CR-5512 Contamination fraction of drinking water P
3 D
1.0 DW from GW 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 Contamination fraction of irrigation water P
3 D
N/A Input not required - plant ingestion pathway inactive 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 Contamination fraction of meat P
3 D
N/A Input not required - meat ingestion pathway inactive Contamination fraction of milk P
3 D
N/A Input not required - milk ingestion pathway inactive Ingestion, Non-Dietary Livestock fodder intake for meat (kg/d)
M 3
D N/A Input not required - meat ingestion pathway inactive Livestock fodder intake for milk (kg/d)
M 3
D N/A Input not required - milk ingestion pathway inactive Livestock water intake for meat (L/d)
M 3
D N/A Input not required - water ingestion pathway inactive Livestock water intake for milk (L/d)
M 3
D N/A Input not required - milk ingestion pathway inactive Livestock soil intake (kg/d)
M 3
D N/A Input not required - meat ingestion pathway inactive Mass loading for foliar deposition (g/m3)
P 3
D N/A Input not required - plant ingestion pathway inactive 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 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
RSCS TSD 25-108 Revision 0 Page 11 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 Irrigation fraction from ground water P
3 D
N/A Input not required drinking water pathway inactive 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 Wet weight crop yield for Fodder (kg/m2)
P 3
D N/A Input not required - meat ingestion pathway inactive Growing Season for Non-Leafy (y)
P 3
D N/A Input not required - plant ingestion pathway inactive Growing Season for Leafy (y)
P 3
D N/A Input not required - plant ingestion pathway inactive Growing Season for Fodder (y)
P 3
D N/A Input not required - meat ingestion pathway inactive Translocation Factor for Non-Leafy P
3 D
N/A Input not required - plant ingestion pathway inactive Translocation Factor for Leafy P
3 D
N/A Input not required - plant ingestion pathway inactive Translocation Factor for Fodder P
3 D
N/A Input not required - meat ingestion pathway inactive 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 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 Dry Foliar Interception Fraction for Non-Leafy P
3 D
N/A Input not required - plant ingestion pathway inactive Dry Foliar Interception Fraction for Leafy P
3 D
N/A Input not required - plant ingestion pathway inactive Dry Foliar Interception Fraction for Fodder P
3 D
N/A Input not required - meat ingestion pathway inactive Storage times of contaminated foodstuffs (days):
Fruits, non-leafy vegetables, and grain B
3 D
N/A Input not required - plant ingestion pathway inactive Leafy vegetables B
3 D
N/A Input not required - plant ingestion pathway inactive Milk B
3 D
N/A Input not required - milk ingestion pathway inactive Meat and poultry B
3 D
N/A Input not required - meat ingestion pathway inactive Fish B
3 D
7 RESRAD Default Crustacea and mollusks B
3 D
7 RESRAD Default Well water B
3 D
1.0 RESRAD default
RSCS TSD 25-108 Revision 0 Page 12 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 Surface water B
3 D
N/A Input not required drinking water pathway inactive Livestock fodder B
3 D
N/A Input not required - meat ingestion pathway inactive Special Radionuclides (C-14)
C-12 concentration in water (g/cm3)
P 3
D 2.00E-05 RESRAD Default C-12 concentration in contaminated soil (g/g)
P 3
D 3.00E-02 RESRAD Default Fraction of vegetation carbon from soil P
3 D
2.00E-02 RESRAD Default Fraction of vegetation carbon from air P
3 D
9.80E-01 RESRAD Default 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 C-12 evasion flux rate from soil (1/s)
P 3
D 1.00E-10 RESRAD Default Fraction of grain in beef cattle feed B
3 D
0.2500 NUREG/CR-7267 Fraction of grain in milk cow feed B
3 D
0.1000 NUREG/CR-7267 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 (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
RSCS TSD 25-108 Revision 0 Page 13 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Table 2. Input Values for DCGL Calculations: OC Buried Pipe Scenario to Support the Industrial Use Compliance Scenario - Open DW Pathway Parameter (unit)
Typea Priorityb Treatmentc Value/Distribution Basis Distribution's Statistical Parametersd Median/
Mean 1
2 3
4 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 Number of points 32 RESRAD Default Spacing log RESRAD Default Time integration parameters Maximum number of points for dose 17 RESRAD Default The DCGLbp values (pCi/m2) corresponding to an annual dose equal to 25 mrem were calculated using the following equation:
DCGLbp,ROC = (25)÷(POMROC Cs)
Where:
DCGLbp,ROC = the DCGLbp value for ROC in units of pCi/m2 25 = 10CFR20.1402 radiological criterion for unrestricted release (mrem/y)
POMROC = calculated RESRAD-Onsite POM for the ROC (mrem/y per 1 pCi/g)
RSCS TSD 25-108 Revision 0 Page 14 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Cs = concentration in soil (pCi/g) resulting from an initial surface contamination of 1 pCi/m2, calculated as follows:
Cs = (initial pipe surface contamination total pipe SA) ÷ (total pipe CV soil density unit CF)
Cs = (pCi/m2 m2) ÷ (m3 g/cm3 106cm3/1m3) = pCi/g per 1pCi/m2 Cs = (1 832.4) ÷ (141.48 1.5105 106) = 3.90E-06 pCi/g per 1pCi/m2.
Note: the median value for the sand density distribution from NUREG/CR-7267 is assumed as the value for soil density.
The calculated POM dose for each ROC and the DCGLbp values are provided in Table 3.
Table 3. Development of DCGLbp Values ROC Peak of Mean Dose (mrem/y)
DCGLbp (pCi/m2)
Am-241 1.23E+00 5.23E+06 C-14 3.24E-02 1.98E+08 Cm-243 3.60E-01 1.78E+07 Cm-244 2.88E-01 2.23E+07 Co-60 5.68E-02 1.13E+08 Cs-137 2.58E-02 2.48E+08 Eu-152 8.20E-03 7.83E+08 Eu-154 1.19E-02 5.38E+08 Fe-55 1.38E-04 4.66E+10 H-3 4.62E-03 1.39E+09 Mn-54 9.44E-02 6.80E+07 Nb-94 1.16E-03 5.54E+09 Ni-63 1.91E-03 3.35E+09 Np-237 7.16E+01 8.97E+04 Pu-238 1.73E+00 3.71E+06 Pu-239 2.17E+00 2.95E+06 Pu-240 2.17E+00 2.96E+06 Pu-241 4.16E-02 1.54E+08 Sb-125 4.36E-02 1.47E+08 Sr-90 1.00E+01 6.41E+05 Tc-99 7.93E-02 8.09E+07
RSCS TSD 25-108 Revision 0 Page 15 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values An open DW pathway lowers the DCGLbp values for all ROCs as shown in Table 4.
Table 4. Impact of DW Pathway on BFM DCGLbp Values BFM DCGLbp Value (pCi/m2)
ROC Without DW Pathwaya With DW Pathway Am-241 6.00E+10 5.23E+06 C-14 1.72E+09 1.98E+08 Cm-243 6.17E+11 1.78E+07 Cm-244 2.27E+11 2.23E+07 Co-60 7.07E+12 1.13E+08 Cs-137 4.93E+11 2.48E+08 Eu-152 1.49E+13 7.83E+08 Eu-154 1.23E+13 5.38E+08 Fe-55 6.91E+15 4.66E+10 H-3 8.06E+15 1.39E+09 Mn-54 1.62E+14 6.80E+07 Nb-94 4.97E+13 5.54E+09 Ni-63 6.17E+14 3.35E+09 Np-237 1.24E+10 8.97E+04 Pu-238 5.83E+08 3.71E+06 Pu-239 4.33E+08 2.95E+06 Pu-240 4.36E+08 2.96E+06 Pu-241 5.68E+10 1.54E+08 Sb-125 4.01E+11 1.47E+08 Sr-90 1.15E+12 6.41E+05 Tc-99 1.25E+13 8.09E+07 a Values from ENG-OCS-016
RSCS TSD 25-108 Revision 0 Page 16 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values 3 References
- 1. ANL/EVS/TM-18/1, RESRAD-Onsite 7.2 Users Guide, April 2018
- 2. TSD 25-032, Radionuclides of Concern in Support of the Oyster Creek Station License Termination Plan, Revision 0
- 3. ENG-OCS-016, Calculation of Buried Pipe DCGL Values, February 20, 2024
- 4. NUREG/CR-7267, Default Parameter Values and Distribution in RESRAD-ONSITE V7.2, RESRAD-BUILD V3.5, and RESRAD-OFFSITE V4.0 Computer Codes, February 2020
RSCS TSD 25-108 Revision 0 Page 17 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Pages from the RESRAD-Onsite reports showing the POM dose values for the buried pipe scenario by radionuclide:
Am-241 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/22/2025 14:55 Page 20 Probabilistic results summary : OCS BFM_IU_IR_BP_DCGL_Am241 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\AM241\\BFM-IU-BP_DCGL_AM241 DW.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 3.000E+01 1.228E+00 C-14 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 09:04 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_C14 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\C14\\BFM-IU-BP_DCGL_C14 DW.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 3.241E-02 Cm-243 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 10:11 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Cm243 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\CM243\\BFM-IU-BP_DCGL_CM243 DW.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 3.597E-01 Cm-244 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 15:42 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Cm244 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\CM244\\BFM-IU_BP_DCGL_CM244 DW.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 2.876E-01 Co-60 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 08:57 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Co60 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\CO60\\BFM-IU-BP_DCGL_CO60 DW.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 5.678E-02 Cs-137 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 09:29 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Cs137 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\CS137\\BFM-IU-BP_DCGL_CS137 DW.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 2.584E-02
RSCS TSD 25-108 Revision 0 Page 18 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Eu-152 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 09:36 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Eu152 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\EU152\\BFM-IU-BP_DCGL_EU152 DW.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 8.196E-03 Eu-154 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 09:51 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Eu154 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\EU154\\BFM-IU_BP_DCGL_EU154 DW.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 1.192E-02 Fe-55 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 10:00 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Fe55 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\FE55\\BFM-IU_BP_DCGL_FE55 DW.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 1.377E-04 H-3 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 13:58 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_H3 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\H3\\BFM-IU_BP_DCGL_H3 DW.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 4.620E-03 Mn-54 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 14:06 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Mn54 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\MN54\\BFM-IU_BP_DCGL_MN54 DW.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 9.439E-02 Nb-94 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 15:32 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Nb94 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\NB94\\BFM-IU_BP_DCGL-NB94 DW.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 7.017E+01 1.159E-03
RSCS TSD 25-108 Revision 0 Page 19 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Ni-63 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/24/2025 08:43 Page 20 Probabilistic results summary : OCS BFM_IU_BP_DCGL_Ni63 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\NI63\\BFM-IU_BP_DCGL_NI63 DW.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 2.894E+00 1.914E-03 Np-237 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/21/2025 14:13 Page 20 Probabilistic results summary : OCS IU_BP_DCGL_Np237 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\NP237\\BFM-IU_BP_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 0.000E+00 7.157E+01 Pu-238 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/22/2025 18:34 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Pu238 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\PU238\\OCS-IU_BP_DCGL_PU238 DW.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 1.731E+00 Pu-239 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/23/2025 08:28 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Pu239 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\PU239\\OCS_IU_BP_DCGL_PU239 DW.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 2.173E+00 Pu-240 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/23/2025 09:29 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Pu240 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\PU240\\OCS_IU_BP_DCGL_PU240 DW.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 2.170E+00 Pu-241 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/22/2025 11:03 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Pu241 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\PU241\\OCS-IU_BP_DCGL_PU241 DW.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 4.163E-02
RSCS TSD 25-108 Revision 0 Page 20 Industrial Use Scenario with Open Drinking Water Pathway:
An Assessment of Impact on BFM DCGLbp Values Sb-125 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/24/2025 08:57 Page 20 Probabilistic results summary : OCS _IU_BP_DCGL_Sb125 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\SB125\\OCS-IU_BP_DCGL_SB125 DW.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 4.356E-02 Sr-90 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/24/2025 09:35 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Sr90 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\SR90\\OCS_IU_BP_DCGL_SR90 DW.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 1.002E+01 Tc-99 Results:
1RESRAD-ONSITE, Version 7.2 T<< Limit = 30 days 02/24/2025 09:47 Page 20 Probabilistic results summary : OCS_IU_BP_DCGL_Tc99 DW File : C:\\RESRAD_FAMILY\\ONSITE\\7.2\\USERFILES\\BFM IU BP DW\\TC99\\OCS_IU_BP_DCGL_TC99 DW.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 7.929E-02