E910-02-005, Supplemental Response to RAI 2 Questions

Supplemental Response to RAI #2 Questions

ML020380450
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	02/04/2002
From:	Kuehn G GPU Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
-nr, E910-02-005
Download: ML020380450 (137)

Text

GPU Nuclear, Inc.

(GPU NUCLEARPost 441 South RouteOffice Box 480 NUCLEAR Middletown, PA 17057-0480 Tel 717-944-7621 717-948-8720 February 4, 2002 E910-02-005 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Gentlemen,

Subject:

Saxton Nuclear Experimental Corporation (SNEC)

Operating License No., DPR-4 Docket No. 50-146 Supplemental Response to RAI #2 Questions Attached to this letter is GPU Nuclear's supplemental response to the NRC Request for Additional Information (RAI2), dated November 8, 2000, concerning the License Termination Plan (LTP) for the Saxton Nuclear Experimental Corporation (SNEC) facility. GPU Nuclear letter E910-01-012, dated June 20, 2001 provided responses to several of these questions.

From this letter, question resolution and further action items were specified pertaining to RESRAD modeling, Kd development, use of buried debris/refill materials and river sediment characterization.

The purpose of this letter is to provide supplemental responses, based on recent empirical study, for the remaining questions (4-9).

If you have any questions, please contact Mr. James Byrne at (717) 948-8461.

Sincerely, G.A. Kuehn Jr.

Program Director, SNEC Facility Attachment cc: NRC Project Manager NRC Project Scientist, Region 1

Revision Date: 01/31/2002 Response to SNEC RAI2 (Questions 4-9)

Note: Previous responses to Questions 1-3 & 10 are unchanged. Reference GPU Letter #E910-01 012 to NRC dated 6129101.

QUESTION 4:

Resident Farmer Assumptions and Justifications used to Demonstrate Compliance Please describe the assumptions and provide justifications for the parameters used in the RESRAD calculation of the site-specific DCGLs for contaminated soil. Specifically, provide justification for the parameters listed in the attached Table 1. Guidance on sources of information for providing acceptable justification for parameters used in dose assessments can be found in the "Draft Technical Basis Document to the Standard Review Plan for Decommissioning," which is located at http:/Iwww.nrc.gov/NMSS/DWM/DECOM/dosemodel.htm.

[LTP

References:

Appendix 6.1; Section 6.2.2; Haley & Aldrich Letter, March 31, 1999, appended to chapter 6.]

RESPONSE

This response replaces our response to question 4 previously provided by GPU Nuclear Letter E910-01-012 dated June 20, 2001.

Two models have been developed covering surface and sub-surface open land areas for the Resident Farmer scenario. Both models were developed using the RESRAD Version 6.1 deterministic and probabilistic codes. GPU Nuclear developed the surface model while URS Corporation developed a sub surface model, incorporating many of the same input parameters used in the surface model. Appendix 2 provides the URS report, which discusses the sub-surface model and calculation of the sub-surface DCGLs.

Table 1 provides input parameters used by GPU Nuclear to derive site-specific DCGLs. These parameters were used as input into the RESRAD 6.1 deterministic and probablistic codes for modeling dose from radioactivity in the surface unit at the SNEC facility. R016 parameters associated with distribution coefficients (Kd) have been developed through empirical testing by Argonne National Lab (ANL) on media samples obtained from the SNEC Facility. Results of these Kd analyses are listed in Table 3. Other supporting information and justification for Table input parameters are as follows:

Section I provides the geology and hydrogeology information for the SNEC site.Section II provides a list of RESRAD input parameters and the classification and justification for each parameter.

Section III provides a list of 22 input parameters (Table 3) that have the greatest influence in the dose calculation sensitivity analyses. The degree of sensitivity from each these input parameters could vary depending on the type of isotope selected. Therefore, the Table 3 list is not ranked by importance.

DCGL results were compared between the two models. Minimum value DCGLs were combined into a single list based on minimum dose limit and pathway criteria. Table 2 provides a list of these DCGL values.

Also see GPU Nuclear's response to Question 8 of this RAI.

I

'I Table I RESRAD INPUTS RESRAD INPUT VALUES FOR PROBALISTIC ANALYSIS Basic Range of Values Evaluated Assigned RESRAD Input Min. Max. Distribution Menu Class PARAMETERS 0.3 0.2 0.6 Triangular C14 P Thickness of Soil Evasion Layer of C-14 in Soil (m)

Not Used by RESRAD N/A N/A N/A NIA p Contaminated Zone Effective Porosity 10000 N/A N/A Not Included in Probalistic Analysis RO11 P Area of Contaminated Zone (m ^2) 25 N/A N/A Not Included in Probalistic Analysis ROll NRC Basic Radiation Dose Limit (mrem/y) (NRC) 112.8 N/A N/A Not Included in Probalistic Analysis RO11 P Length Parallel to Aquifer Flow (m) 1 0.5 1. 5 Uniform ROll P Thickness of Contaminated Zone 1 (m) 0 N/A N/A Not Included in Proballstic Analysis RO11 P Time Since Placement of Materials (yr) 1 N/A NIA Not Included in Probalistic Analysis RO11 P Times for Calculations (yr) 3 N/A N/A Not Included in Probalistic Analysis RO1 p Times for Calculations (yr) 10 N/A N/A Not Included in Probalistic Analysis RO1 p Times for Calculations (yr) 30 N/A N/A Not Included in Probalistic Analysis RO t p Times for Calculations (yr) 150 N/A N/A Not Included in Probalistic Analysis ROll P Times for Calculations (yr) 350 N/A N/A Not Included in Probalistic Analysis RO11 p Times for Calculations (yr) 1000 N/A NIA Not Included in Probalistic Analysis ROll p Times for Calculations (yr) 10000 NIA N/A Not Included in Probalistic Analysis RO11 p Times for Calculations (yr) 4.07 3.13 4.83 Not Included in Probalistic Analysis R013 P Average Annual Wind Speed (m/sec) 0.136 0.079 0.192 Not Included In Probalistic Analysis R013 P Contaiminated Zone Field Capacity 5.6 4.07 7.12 Not Included In Probalistic Analysis R013 p Contaminated Zone b Parameter 0.000345 0.00009 0.0006 Loguniform R013 p Contaminated Zone Erosion Rate (m/yr)

Contaminated Zone Hydraulic Conductivity (m/yr) 32.3 0.362 25400 Loguniform R013 p Contaminated Zone Total Porosity 0.46 0.35 0.56 Uniform RO13 p N/A Cover Depth (m) 0 N/A N/A R013 P Not Used by RESRAD N/A N/A N/A R013 P, B Cover Depth Erosion Rate (m/yr) 1.6 1.28 1.92 Uniform RO13 P Density of Contaminated Zone (g/cc)

Not Used N/A N/A N/A R013 p Density of Cover Material (g/cc) 0.59 0.5 0.67 Uniform R013 p Evapotranspiration Coefficient (m/yr) 8 Default Value Default Value Truncated Lognormal-N R013 p Humidity in Air (Default Value Used) (g/mA3) 0.2 0.1 0.4 Uniform R013 B Irrigation (m/yr) (Default Value Used)

Overhead N/A N/A N/A R013 B Irrigation Mode (Overhead) 0.936 0.688 1.327 Uniform R013 P Precipitation (m/y) 0.35 0.3 0.4 Uniform R013 P Runoff Coefficient 5.OOE+06 2.500E+06 7.500E+06 Uniform R013 P Watershed Area for Nearby Stream or Pond (mA2) 1.6 1.28 1.92 Uniform R014 p Density of Saturated Zone (g/cc)

Non-Dispersion NIA N/A N/A R014 p Model: Non-dispersion (ND) or Mass-Balance (MB)

Not Used by RESRAD N/A N/A N/A R014 P Saturated Zone b Parameter 0.028 0.005 0.05 Loguniform R014 p Saturated Zone Effective Porosity 67.91 15.59 909.53 Uniform R014 P Saturated Zone Hydraulic Conductivity (m/yr) 0.02 0.013 0.03 Uniform R014 P Saturated Zone Hydraulic Gradient 0.36 0.31 0.41 Uniform R014 P Saturated Zone Total Porosity 0 N/A N/A N/A R014 p Water Table Drop Rate (m/yr) 30 10 50 Uniform R014 P Well Pump Intake Depth (m)

^3/yr) 286.2 207.3 365 Not Included in Probalistic Analysis R014 B, P Well Pumping Rate (m 0.136 0.079 0.192 Not Included in Probalistic Analysis R014 P Saturated Zone Field Capacity 1.6 1.28 1.92 Uniform RO15 P Density of Unsaturated Zone I (g/cc) 0.41 0.28 0.54 Uniform RO15 P Effective Porosity of Unsaturated Zone 1 32.3 0.362 25400 Loguniform RO1 P Hydraulic Conductivity of Unsaturated Zone I (m/yr)

I N/A N/A N/A RO1 P Number of Unsaturated Zone Strata 2

RO15 P Thickness of Unsaturated Zone 1 (m) 0.25 0 0.5 Uniform RO15 p Total porosity of Unsaturated Zone 1 0.46 0.35 0.56 Uniform ROlS P Unsaturated Zone 1 b Parameter 5.6 4.05 7.12 Not Included in Probalistic Analysis ROI P Unsaturated Zone Field Capacity 0.136 0.079 0.192 Not Included in Probalistic Analysis RO17 P External Gamma Shielding Factor 0.7 0.044 1 Bounded Lognormal-N R017 P Indoor Dust Filtration Factor 0.4 0.15 0.95 Uniform RO17 M, B Indoor Time Fraction 0.5 0 1 Continuous Linear R017 M, B Inhalation Rate (mA3/yr) 8400 4380 13100 Triangular RO17 P Mass Loading for Inhalation (g/mA3) 0.0001 0 0.0001 Continuous Linear RO18 B, P Contaminated Fraction of Aquatic Food 0.5 0 1 Triangular RO0S B, P Contaminated Fraction of Drinking Water 1 N/A NIA Not Included in Probalistic Analysis RO18 B, P Contaminated Fraction of Household Water Not Used N/A N/A N/A RO18 B, P Contaminated Fraction of Irrigation Water 0.75 0.5 1 Uniform R018 B, P Contaminated Fraction of Livestock Water 0.75 0.5 1 Uniform RO18 B, P Contaminated Fraction of Plant Food I N/A NIA Not Included in Probalistic Analysis RO18 B, P Contaminated Fraction of Meat 1 N/A NIA Not Included in Probalistic Analysis R018 B, P Contaminated Fraction of Milk I N/A NIA Not Included in Probalistic Analysis ROlS M, B Drinking Water Intake (L/yr) 478.5 478.5 730 Uniform ROl1 M, B Fish Consumption (kg/yr) 20.6 20.6 21 Uniform RO18 M, B Fruit, Vegetable, and Grain Consumption (kg/yr) 112 112 52 Ui:r R018 M, B Leafy Vegetable Consumption (kg/yr) 21.4 21.4 64 Uniform R018 M, B Meat and Poultry Consumption (kg/yr) 67 67 10 Uniform RO18 M, B Milk Consumption 233 233 31 Uniform RO18 M, B Other Seafood Consumption (kglyr) 0.9 0.9 5 Uniform RO18 M, B Soil Ingestion Rate (g/yr) 18.3 18.3 36.5 Uniform R019 P Depth of Roots (m) 0.9 0.3 4 Uniform RO19 p Depth of Soil Mixing Layer (m) 0.15 0 0.6 Triangular RO19B P Weathering Removal Constant of all Vegetation 20 5.1 84 Triangular RO19B P Wet Crop Yield for Fodder (kg/mA2) 1.1 0.55 2.2 Not Included In Probalistic Analysis ROSB P Wet Crop Yield for Leafy (kg/mA2) 1.5 0.75 3 Uniform ROI9B P Wet Crop Yield for Non-Leafy (kglmA2) 0.7 Default Value Default Value Truncated Lognormal-N ROI9B P Wet Foliar Inception Fraction of Leafy Vegetables 0.25 0.06 0.95 Triangular From EPRI Report No. TR.112874 DistributionCoefficient for Americium & Curium Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cmA3/g) 1000 1000 5000 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cmA3/g) 1000 1000 5000 Not Included in Probalistic Analysis RIG P 3. Saturated Zone (cmA3/g) 1000 1000 5000 Not Included in Probalistic Analysis Distribution Coefficient for Carbon Value Used (ANL) GPU Min. GPU Max. Distribution Type R16 P 1. Contaminated Zone (cmA3/g) 1 0 5 Uniform R16 P 2. Unsaturated Zone (cmA3/g) 1 0 5 Uniform R16 P 3. Saturated Zone (cmA3/g) 1 0 5 Uniform Distribution Coefficient for Cobalt Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cmA3/g) 200 200 1000 Not Included In Probalistic Analysis R16 P 2. Unsaturated Zone (cmA3/g) 200 200 1000 Not Included In Probalistic Analysis R16 P 3. Saturated Zone (cmA3/g) 200 200 1000 Not Included in Probalistic Analysis DistributionCoefficient for Cesium Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cm^3/g) 2131 2131 28341 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 2131 2131 28341 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cm^3/g) 2131 2131 28341 Not Included in Probalistic Analysis 3

DistributionCoefficient for Europium Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cm^3/g) 1000 1000 5000 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 1000 1000 5000 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cm^3/g) 1000 1000 5000 Not Included in Probalistic Analysis Distribution Coefficient for Iron Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cmA3/g) 10000 10000 50000 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 10000 10000 50000 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cm^3/g) 10000 10000 50000 Not Included In Probalistic Analysis Distribution Coefficient for Hydrogen Value Used (ANL) GPU Min. GPU Max. Distribution Type R16 P 1. Contaminated Zone (cmA3/g) 1 0 5 Uniform RIB P 2. Unsaturated Zone (cmA3/g) 1 0 5 Uniform RIB P 3. Saturated Zone (cmA3/g) 1 0 5 Uniform WM" DistributionCoefficient for Niobium Value Used ANL Min. ANL Max. Distribution Type RIB P 1. Contaminated Zone (cmA3/g) 80 80 600 Not Included In Probalistic Analysis RIB P 2. Unsaturated Zone (cmA3/g) 80 80 600 Not Included In Proballstic Analysis RIG P 3. Saturated Zone (cm^3/g) 80 80 600 Not Included In Probalistlc Analysis Distribution Coefficient for Nickel Value Used ANL Min. ANL Max. Distribution Type RI6 P 1. Contaminated Zone (cm^3/g) 1300 1300 10000 Not Included In Proballstlc Analysis R16 P 2. Unsaturated Zone (cm^3/g) 1300 1300 10000 Not Included In Proballstic Analysis R16 P 3. Saturated Zone (cm"3/g) 1300 1300 10000 Not Included in Proballstic Analysis Distribution Coefficient for Plutonium Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cm^3/g) 160 160 600 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 160 160 600 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cmA3/g) 160 160 600 Not Included in Probalistic Analysis Distribution Coefficient for Antimony Value Used ANL Min. ANL Max. Distribution Type RIB P 1. Contaminated Zone (cmA3/g) 153 153 5200 Not Included in Probalistic Analysis RIB P 2. Unsaturated Zone (cmA3/g) 153 153 5200 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cmA3/g) 153 153 5200 Not Included In Probalistic Analysis Iffi DistributionCoefficient for Strontium Value Used ANL Min. ANL Max. Distribution Type Rl P 1. Contaminated Zone (cmA3/g) 11 11 475 Not Included in Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 11 11 475 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cmA3/g) 11 11 475 Not Included in Probalistic Analysis WW",Distribution Coefficient for Technetium Value Used ANL Min. ANL Max. Distribution Type Rl P 1. Contaminated Zone (cm^3/g) 1.3 1.3 54 Not Included In Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 1.3 1.3 54 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cmA3/g) 1.3 1.3 54 Not Included In Probalistic Analysis FEMEDistribution Coefficient for Uranium Value Used ANL Min. ANL Max. Distribution Type R16 P 1. Contaminated Zone (cm^3/g) 16 16 5200 Not Included In Probalistic Analysis R16 P 2. Unsaturated Zone (cm^3/g) 16 16 5200 Not Included in Probalistic Analysis R16 P 3. Saturated Zone (cm^3/g) 16 16 5200 Not Included In Probalistic Analysis DistributionCoefficient for Lead Value Used ANL Min. ANL Max. DistributionType R16 P 1. Contaminated Zone (cm^3/g) 9700 9700 160000 Not Included In Probalistlc Analysis R16 P 2. Unsaturated Zone (cmA3/g) 9700 9700 160000 Not Included in Proballstlc Analysis R16 P 3. Saturated Zone (cm^3/g) 9700 9700 160000 Not Included In Probalistic Analysis NOTE: Additional RAI Information Requested But Not Shown In Above Table D34 I P Food Tra ster Factors: I Values Used Distribution Type IPlant/soil concentration ratios, dimensionless RESRAD 6.1 Defaults LOGNORMAL-N Beeftlivestock-intake ratios, (pCi/kgl(pCild) RESRAD G.1 Defaults LOGNORMAL - N iMilkllivestock-intake ratios, (pCilL)l(pCild) RESRAD 6.1 Defaults LOGNORMAL N S5 1 .ulationfactors, fresh water, Likg:

I Fish I RESRAD 6.1 Defaults I LU MNI..

. -.LIN Crustacea and mollusks RESRAD 6.1 Defaults Not Included in Probalistic Analysis 4

Table 2 SNEC Open Land DCGLs I

SUBSURFACE (Below -1 Meter)

SURFACE (Upper -1 Meter) ¢Mtklt PFl=RArl g 1 Prn~h~hili_*tik DCGL's tn~i/al SNE-C. RI-SRAU 6;1 Probabilistic DU*LL S kp1,mlg/ ,) ,v *. ... ..... . . r -o Based on DCGL 25 mrem/y, All Based on DCGL 4 mrem/y, MINIMUM SITE Pathway Standard Drinking-WaterPath DCGLs 25 mrem/y Limit Peak Dose Year(s) 4 mrem/y DW Path Peak Dose Year(s) 0 196 758.6-1000 18 45 18 21.4 0 1038 1-3 89 31 27 27 1949 525 120 970 25 25 0 180 560 39 39 AA 0 868

.. .. S.. .. 525. ..

q'J q*t qU fl/*,

1s Jl A 4 r-atA SI E T Lp-I.

to Co-60 3.9 U V. r.. I 1) - o.,. 1. .-. 1 5.1 0 3.01E+09 3-9.12 29 5.6E+15 (> SA Limit) 5.1 Cs-134 0 1.93E+07 83.2 51 9.4E+05 8.7 Cs-137 8.7 0 1.24E+08 35-57.54 54 3.9E+06 10.8 Eu-152 10.8 0 2.10E+08 27.54 - 39.81 50 9.8E+06 10 Eu-1 54 10 0 4.80E+09 19.05 - 27.54 2100 7.7E+08 415 Eu-155 415 0 8.23E+13 13.18 - 39.81 1.7E+05 7.6E+22 (> SA Limit) 2.3E+04 Fe-55 2.3E+04 1461 2.089 8600 1400 1400 2730 0 0 529 251 38 370 7.6 1 7.6 0 4.74E+05 2291 -3311 1.7.E+04 2.1E+05 3216 Ni-59 3216 44*

14.,7 '-

14 AQ=+n7

'.'4017-t:iU .u z_.;jL; V nR4.l I I I't,/

Or'l 1) - WV) *3UU INi-63 I 0 21.5 174 42 6.7 6.7 24.1 363.1 2.2 525 9.4 1.5 1.5 9.2 363.1 2.3 5.25E+02 9.7 1.6 1.6 9.5 27.54-35 3889 758.6-1000 3400 1100 1021 1021 363.1 2.3 525 9.7 1.6 1.6 9.6 0 1.15E+07 6.31-9.12 100 16 16 33.6 0 6.7 27.5 7 4.2 1.3 1.3 0 46.6 4.4 54 33 11.4 11.4 39.81 - 57.54 2.7 5.75E+01 12 1.9 1.9 12.6 2.8 57.5 12 1.9 1.9 12 39.81 - 57.54 2.9 5.75E+01 12 2 2 13 39.81 - 57.54 NOTE: Bolded values representthe lowest calculatedvalue (25 mrem/y TEDE limit Vs the 4 mremiy drinking water pat).

I Shaded radionuclidesare drinking water dose contributors.

5

Table 3 SNEC SANPLES ASSAYED FOR Kd VALLES ATANL Sample I Sarwle2 San0e 3 Sampe4 Sanre 5 Sawoe6 Sample 7 Sarne 8 ver (orposite) Sedoret Socthi Vof be CV/Pa, Neer Loc,-on Sanre SSGS SE &rp by COd Awess Roa CNAea S&tcIyAd a we C/Area MAeriType Setrret Caistin[De*s RyPsh&Orrdes Back-FRII eials I Fill Sal Oy ia VVWtawBeidP B-odck(atshe Ba*AkxeBridge&Cf "Tp AZ-129, 14' Wby 10 AZ-129, 15 N by 1 FRferece Gd NL & to 19E Ofaslard AV-133 N BA-1329,1' N Bkl2,l1' Nby2 " AZ-128, 13 N AJ-131, 21' Nby2'V

-811' -795 -810.8 -809.12 -D-fX8w LoedstValue HigheValue

-Depth (Gra 1' B) 0(-1' BeloNSedmI -787B H 1,1- -1 1 - 1

,-1 -1 -__-- -1__1__

C N 10000 10000 4000 10000 10000 10000 1300 1500 1300 10000 rNb 600 80 500 500 500 500 SOD 50D 80 Goo Tc M1 54 54 H6 1A 1.6 1.3 1.3 1.3 54 U 37 16 5200 17 34 106 5200 226 16 5200 600 160 600 400 400 400 600 400 160 600 Pu CB, Eu 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 Co 1000 1000 200 1000 1000 1000 1000 1000 200 1000 S2340 2433 2131 14149 13618 2864 9746 28341 2131 28341 Fe 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 SCm 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 60 25 475 28 11 24 114 60 11 475 Sr Sb 1100 153 5200 2070 1100 1800 5000 1900 153 5200 Pb 46000 1.60E05 58000 81000 31000 98000 9700 26000 9700 160000 6

Section I - SNEC Geology/Hydrogeology Background Information Since 1981, subsurface investigations have been conducted through installation of monitor wells. In 1981, a subsurface investigation was conducted to evaluate geologic and hydrogeologic conditions at the Facility. Since 1981, numerous wells were installed, generally to further define the hydrogeologic conditions. Below is a summary of each investigation.

The first investigation was conducted in 1981 by Groundwater Technology, Inc. The investigation consisted of reviewing information obtained from the Pennsylvania State Geologist and the United States Geological Survey (Water for Resource Branch), and conducting geologic reconnaissance of the area to provide the initial geologic interpretation the Facility. In addition, test borings were drilled near the CV and the RWDF to characterize the soils, bedrock and depth to groundwater. The results of this investigation were summarized in a 1981 report entitled "Preliminary Hydrological Investigation, Saxton Nuclear Station, Saxton, Pennsylvania". Results of this investigation were as follows:

" There are three distinct subsurface materials: fill, a boulder layer with silty clay matrix and bedrock (occurring in this order from ground surface when present).

" The material with the highest permeability is at the boulder layer/bedrock interface, based on field permeability testing. Packer tests were conducted in boreholes drilled at the site and soil laboratory mechanical tests were performed on construction fill materials. Packer test results ranged from 10-5 to 10-3 cm/sec and some boreholes had no flow. Soil testing results of fill based on mechanical (sieve) analysis for a silty red sand fill and a sample of flyash both with very high fine grained contents suggested very low permeability probably ranging between 108 to 106 cm/sec.

• Based on the composition of the matrix of the boulder layer, it appears to act as a barrier to the flow of groundwater between the construction fill and the bedrock.

• Preliminary hydraulic gradient of 0.017 to 0.019 (a slope of 10 to 15 feet over a distance of 600-800 feet) from the Site to the river based on groundwater level observations in test borings.

• The combination of hydraulic gradient, bedrock permeability, and bedrock structure (bedding and fracture patterns) indicates that the groundwater has a potential to flow from the Site to the river.

In 1992, GEO Engineering installed monitor wells near the CV and the RWDF. Eight monitoring wells (GEO-1 though GEO-8) were installed in the suspected upgradient and downgradient flow direction for the CV. The wells were screened (and sanded) across the top bedrock and boulder layer contact (overburden/bedrock interface). This zone was previously identified in the 1981 as an area of relatively higher permeability compared to its immediate surroundings. The results of this investigation were included in a 1992 report entitled, Phase I Report of Findings Groundwater Investigation Saxton Nuclear Experimental Station, Saxton, Pennsylvania, by GEO Engineering. Other information from this investigation includes:

"* At the overburden/bedrock interface, groundwater flow direction from the Facility is toward the west/northwest and the river (Raystown Branch of Juniata River). A relative elevation survey of eight monitor wells was conducted.

Water level information from these eight wells was used to produce computer-generated groundwater elevation contour maps.

"* The results of the investigation indicated that groundwater movement in bedrock is controlled by fractures trending to the northwest and to the northeast (bedding planes and a fracture set).

" Two additional wells were proposed in bedrock adjacent to the CV.

In 1994, GEO Engineering installed three monitor wells at the Site. Two additional monitor wells (MW-1 and MW-2) were installed near the CV. The two additional monitor wells were installed west and northwest of the CV at an angle, approximately 250, to facilitate the interception of groundwater flowing in fractured bedrock. The wells, completed as gas-actuated monitor wells, 54' in length, were installed to the depth similar to the CV (approximately 50' below ground surface). A third monitor well, a 50-foot monitor well (GEO-9), was installed in bedrock making it possible to obtain water level elevation data from the bedrock unit. As part of this field activity, monitoring wells GEO-1 to GEO-8 were retrofitted with gas actuated samplers. The results of this investigation were reported in GEO Engineering's, Summary of Field Work, 1994.

7

In 1998, a total of three additional wells were added to the monitoring array. Two bedrock monitor wells (MW-3 and MW-4) with gas actuated devices were installed adjacent to the RWDF (to the depth of the sump) to investigate the potential presence of tritium in groundwater. In addition, GEO-10 was installed at the overburden/bedrock interface downgradient of GEO-5 to evaluate trace amounts of tritium detected in the groundwater at GEO-5. Haley and Aldrich described details of this investigation in a 1998 Summary of Field Work.

In December 2000, additional monitor wells were installed at the Site and slug testing was performed to evaluate hydraulic conductivity of the materials. Seven monitor wells were installed to characterize groundwater flow in the area beyond the Facility. The seven wells consisted of three nests of an overburden/bedrock interface and bedrock well (OW-3/3R, OW-4/4R, and OW-5/5R) and one additional overburden well (OW-6). The monitor wells in the overburden are screened at the overburden/bedrock interface. The bedrock wells extend to 50 feet below ground surface. The well installations occurred between December 11 and 21, 2000. The investigation confirmed the presence of the types of subsurface materials reported in earlier investigations. Slug tests (falling head tests) were conducted on the monitor wells.

In May 2001, one additional monitor well nest and two observation points were installed in the area of the Facility. The monitor well nest, OW-7 and OW-7R, consists of a well installed in the overburden/bedrock interface and a well installed in bedrock. The cluster was installed to the east of the discharge tunnel, between the Facility and the river.

The two observation points (OP-3 and OP-4) were installed in the backfill on the eastern side of the discharge tunnel.

The purpose of the wells was to obtain additional groundwater elevation data and provide an additional groundwater monitoring points for the detection of tritium, if present, in groundwater. Results of groundwater elevation data and addition hydrology information was previously submitted to the NRC in GPU Nuclear letter E910-02-003, dated January 24, 2002.

Subsurface Materials There is approximately 7 to 18 feet of overburden material overlying bedrock (a fractured siltstone). The overburden materials generally consist of fill overlying a natural boulder layer with silt and clay filling the interstitial spaces.

Groundwater occurs in both the overburden/bedrock interface and the fractured bedrock. A detail description of each unit follows and Figure 1 shows a generalized cross section of these materials.

FILL The material near the ground surface is referred to as fill. The material generally consists of sand, silt and gravel or ash and cinders (initial Site investigation by Groundwater/Technology, Inc. in 1981). In most areas adjacent to the area modified during the construction of the CV this material has been observed to be 1.5 to 4 feet thick. The fill material is generally unsaturated. However, local water level information indicates for a period of one to two months in the spring water levels come up into the fill.

BOULDER LAYER A boulder layer apparently was formed as a result of the river's depositional processes.

Most of the boulders are rounded and are very hard quartzite (virtually no porosity). The void space between the boulders contains a dense mixture of sand, silt and clay. Based on these characteristics, this material has low bulk permeability and consequently acts as a hydraulic barrier to flow between the fill and the siltstone bedrock. Although water level information indicates most of this layer is saturated, it does not undergo appreciable groundwater flow (when present).

SHALE AND SANDSTONE BEDROCK The bedrock locally underlying the boulder layer is identified as the marine beds of upper Devonian age in the Paleozoic era (Pennsylvania Geologic Survey, Fourth Series, 1960). These rocks are described as gray to olive brown shales, graywackes and sandstone. The top of the bedrock surface is weathered and fractured (Groundwater Technology, Inc. 1981). Also, the bedrock surface apparently decreases in elevation from the Facility to the northwest. This surface apparently decreases in elevation to the north and the south.

8

Section II- Descriptions and Justifications for RESRAD Input Parameters Per NUREG-1 727, Appendix C, "Technical Basis for Dose Modeling Evaluation" the following responses include the of the RESRAD menu code, parameter description, how the parameter is used in the dose model, the classification parameter (e.g. behavioral, metabolic, or physical) and the basis for its selection.

Note: Unless a RESRAD default value is specified, the range of the following values is used as the boundary conditions for all RESRAD probabilistic input. Any single value stated is used as the deterministic input.

R01 3 Cover depth (m) - Physical Parameter as 0.0 Cover will not be placed over the area for which the modeling applies, and therefore, the cover depth was input meters.

3 R013 Density of cover material (q/Gcm ) - Physical Parameter Since the above-described parameter (cover depth) is input as 0.0, density of the cover material is not applicable and therefore not input into the RESRAD model.

R013 Cover depth erosion rate (m/yr) - Physical Parameter applicable and Since the above-described parameter (cover depth) is input as 0.0, density of the cover material is not therefore not input into the RESRAD model.

3 R01 3 Density of contaminated zone (,Q/cm ) - Physical Parameter shown on Figure 1.

For the surface model, a contaminated zone is located between approximately 0 and 1.0 meter, as Based on subsurface investigations as described in Section I, the geologic stratigraphy at this depth is described as mixed soils, sandy or silty clay to well graded sand and gravel with rock fragments. Based on the May 1982 for this Department of Navy Naval Facilities Engineering Command (NAVFACI DM-7.1 Manual, dry weight density is in the range of 80 to 120 lb./ft (or 1.28 to 1.92 g/cm ). The range for dry weight as opposed to wet, type of material is unsaturated. The value input into the RESRAD or submerged weight was used, as the depth of soil, contamination 3

model was 1.60 g/cm , the average of the above-stated range.

R013 Contaminated zone erosion rate (m/yr) - Physical Parameter Based on the Data Collection Handbook to Support Modeling Impacts of Radioactive Material in Soil (C. Yu, C.

Argonne Loureiro, J. -J. Cheng, L.G. Jones, Y.Y Wang, Y.P Chia, and E. Faillace, Environmental Assessment Division

- www.ead.anl.gov) and assuming future use scenario as row-crop agriculture with an National Laboratory was approximate 2% slope, the range of 6x1 0 - to 9x1 0-5 m/yr was used. The value input into the RESRAD model 3.45x10-4 m/yr, the average of the above-stated range.

R013 Contaminated zone total porosity - Physical Parameter is Based on subsurface investigations as described in Section I, the geologic stratigraphy of the contaminated zone described as mixed soils, sandy or silty clay to well graded sand and gravel with rock fragments. Referencing Maidment, Handbook of Hydrology (pp. 5.14), 1993, these soil types correspond to total porosity ranges of between the 0.35 and 0.56. Total porosity is defined as the part of rock or soil volume, which is void space. The value input into RESRAD model was 0.46, the average of the above-stated range.

R013 Contaminated zone effective porosity - Physical Parameter The effective porosity range for the site was based on the soil types. Referencing Maidment, Handbook of Hydrology (pp. 5.14), 1993 expressed the effective porosity range of 0.28 to 0.54 based on the soil types found at the site.

soil. The Effective porosity is defined as the percentage of inter-connected void space, and is applied to characterize recommended value is 0.41, the average of the above-stated range. This value is not used by RESRAD 6.0.

R013 Contaminated zone hydraulic conductivity (m/yr) - Physical Parameter Hydraulic conductivity values are based on field permeability testing, soil characterization, empirical relationships, published values and the experience of our expert consultant. Packer tests (rock pressure tests) were performed during the 1981 Preliminary Hydrogeologic Investigation in order to estimate the apparent permeability of the bedrock below the site. The packer test involves pumping water under pressure into selected sections of an open borehole isolated using pneumatic packers. Packer tests indicated hydraulic conductivity of the bedrock to range between 1x10 3 cm/s to negligible flow.

In addition to packer testing for the 1981 report, sieve analyses were conducted on samples of the silty sand fill and ash fill. Initial estimates of hydraulic conductivity suggested a high of 1x106 cm/s for the fill.

9

Based on recent analyses for the purpose of the RESRAD modeling, data from the grain size distributions of the fill collected from the 1981 investigation were entered into several empirical relationships in order to refine the estimates of hydraulic conductivity. These empirical relationships relate median effective grain diameter (typically, the grain diameter which represents the 10% finer by weight on a grain size distribution) as well as other properties including sorting and porosity to hydraulic conductivity. The empirical relationships used have been shown to correspond well with field measured hydraulic conductivity (Vukovic, Milan and Soro, Andjelko, Determination of Hydraulic Conductivity of Porous Media from Grain-Size Composition, 1992).

The following presents one of the empirical equations as taken from Vukovic, Milan and Soro, Andjelko, Determination of Hydraulic Conductivity of Porous Media from Grain-Size Composition, 1992:

Slichter:

S n3.

2 87 d2 Where: K = hydraulic conductivity (cm/sec) 2 g = acceleration due to gravity: 980 cm/sec v = kinematic viscosity of water [at 20 deg C]: 1.125x10 C, = constant: 1.Oxl 62 n = porosity dio = effective grain diameter Hydraulic conductivity values for the fill generated through the empirical relationships using grain size data were somewhat higher than the estimates initially suggested in the 1981 Preliminary Hydrogeologic Investigation report.

5 Specifically, the original report suggested hydraulic conductivity values ranging from 1x10-6 to 1x10- to cm/s (0.315 to 3.15 m/yr). However, recent evaluations of grain size data (soil samples S-1, S-2 from the 1981 Ground/Water Technology investigation and TB-i, similar to TB-3 from the Haley & Aldrich geotechnical4 investigation 1999) suggest 2

hydraulic conductivity values ranging from 1x10-6 to 8x10- cm/s (3.62 x 10-1 to 2.54 x 10 to m/yr), which is the range used in the RESRAD modeling. The recommended value input into the RESRAD model is 32.3 m/yr (1 x 10-4 cm/sec),

the geometric mean of the above-stated range.

In addition to methods described above, hydraulic conductivity was qualitatively assessed given the experience of our expert consultant and based on their visual observation during installation of the soil borings and soil sample characterization. The values given above also correspond with published values for silts, sandy silts, and clayey sands (Applied Hydrogeology, Fetter, C.W., 1988).

R013 Contaminated zone b parameter - Physical Parameter As described in the Data Collection Handbook to Support Modeling Impacts of Radioactive Material in Soil (C. Yu, C.

Loureiro, J. -J. Cheng, L.G. Jones, Y.Y Wang, Y.P Chia, and E. Faillace, Environmental Assessment Division Argonne National Laboratory - www.ead.anl.qov) the soil-specific exponential b parameter is an empirical and dimensionless parameter that is used to evaluate the saturation ratio (or the volumetric water saturation) of the soil. Published data based on laboratory testing indicate ranges of the exponential b parameter to be between 4.05 and 7.12. The RESRAD input for this parameter was based on the values corresponding from sand to loam in Table 13.1 of the Data Collection Handbook. The recommended value for the RESRAD model is 5.6, the average of the above-stated range.

R01 3 Average annual wind speed (m/sec) - Physical Parameter The input values for this parameter were based on data provided from the National Climatic Data Center (1999 Annual Summary Local Climatological Data for Pittsburgh, Pennsylvania). The RESRAD input reflects the minimum monthly mean wind speed (3.13 m/sec or 7.0 mph) and maximum monthly mean wind speed (4.83 m/sec or 10.8 mph) over a 42 year span. The value input into the RESRAD model is the annual mean wind speed based on 42 years of data of 4.07 m/sec (9.1 mph).

R013 Humidity in air (q/m 3 ) - Physical Parameter This default value of 8.0 g/m' was used in the RESRAD model.

R01 3 Evapotranspiration coefficient - Physical Parameter The value range for this input parameter was based primarily on guidance in the Data Collection Handbook to Support Modeling Impacts of Radioactive Material in Soil, and was estimated through an iterative solution with other parameter values including precipitation, irrigation and runoff coefficient. The range was based on a runoff coefficient (Cr) range of 0.3 to 0.4; a precipitation range (Pr) of 0.688 to 1.327 m/yr; and an irrigation value (IRr) of 0.2 (refer to individual parameter justifications, as described below). Using these values, an evapotranspiration rate (ETr) was estimated (this value is not used implicitly in RESRAD, but is an intermediate step in calculating the evapotranspiration coefficient).

10

Based on the Evaporation Atlas of the United States (NOAA, 1982), evaporation is estimated to be approximately half of the total (annual) precipitation for the Saxton, PA area. Given this, the evapotranspiration coefficient was estimated as follows:

Ce- ET, E

(-QCr)

• P, + IRr Calculated Range of Ce = 0.50 to 0.67 m/yr The value input into the RESRAD model was 0.59, the average of the above-stated range.

R01 3 Precipitation (m/yr) - Physical Parameter The input values for this parameter were based on data provided from the National Weather Service (1999 Annual Summary Local Climatological Data for Pittsburgh, Pennsylvania). The RESRAD input range reflects the 30 year minimum (0.688 m/yr or 27.09 inches/yr) and maximum (1.327 mly or 52.24 inches/yr) annual precipitation amounts.

The value input into the RESRAD model was 0.936 m/yr (36.85 inches/yr) which is the 30 year annual precipitation average.

R013 Irrigation (m/yr) - Physical Parameter Based on the agricultural use scenario, the default value for irrigation (0.2 m/yr) was input into the RESRAD model.

R013 Irrigation mode - Physical Parameter It was assumed that the irrigation would be distributed overhead.

R013 Runoff coefficient - Physical Parameter The input values for this parameter were based on data provided from two sources: U.S. Geological Survey Hydrologic Investigation Atlas HA-710 - Average Annual Runoff in the United States, 1951-1980, and Table 10.1 of the Data Collection Handbook to Support Modeling Impacts of Radioactive Material in Soil. The RESRAD input range represents coefficient values corresponding to an agricultural environment comprised of flat to rolling land (slopes of 0.3 to 6.1 m/mi). The corresponding range for runoff coefficient is 0.3 to 0.4. The value input into the RESRAD model was 0.35, the average of the above-stated range.

R01 3 Watershed area for nearby stream or pond (m2) - Physical Parameter Based on the topographic quadrangles for Saxton, PA and Hopewell, PA, the watershed area surrounding the facility was estimated as the total area of land bounded by the Juniata River and surrounding topographic high areas. The value input into the RESRAD model was 5x106 m2.

3 R014 Density of saturated zone (,q/cm ) - Physical Parameter The saturated zone begins at between 0.7 and 2.3 meters below ground surface. Based on subsurface investigations as described in Section I, the geologic stratigraphy at this depth, and below, is described as mixed soils and bedrock.

Based on the May 1982 Department of Navy Naval Facilities Engineering Command (NAVFAC) DM-7.1 Manual, 3

density for this type of material is in the range of 80 to 120 Ib./ft (or 1.28 to 1.92 g/cm°). The range 3for wet weight was used as this pertains to saturated soil/rock. The value input into the RESRAD model was 1.60 g/cm , the average of the above-stated range.

R014 Saturated zone total porosity - Physical Parameter Based on subsurface investigations as described in Section I, the geologic stratigraphy of the saturated zone is described as mixed soils and bedrock. As denoted in Figure 1, units B, B/C and C are considered saturated and only units B/C and C subject to any appreciable flow of groundwater. Further, based on the thicker saturated thickness of unit C in relationship to unit B/C and other pertinent information we recommended combining the interface and bedrock units (B/C and C) and using values for the siltstone bedrock for the RESRAD inputs.

Referencing Domenico and Schwartz, Physical and Chemical Hydrogeology (1990, p. 29) the siltstone bedrock's total porosity ranges between 0.31 and 0.41. Total porosity in bedrock is related to fracture porosity, which for this rock type, provides the majority of the void space. The recommended value input into the RESRAD model is 0.36, the average of the above-stated range.

R014 Saturated zone effective porosity - Physical Parameter The effective porosity range is based on bedrock. Referencing Domenico and Schwartz, Physical and Chemical Hydrogeology (1990, p. 2 9) expressed the effective porosity range of 0.005 to 0.05 based on shale bedrock. The recommended input into the RESRAD model is 0.028, the average of the above stated range.

ll

R014 Saturated zone hydraulic conductivity (m/yr) - Physical Parameter The hydraulic conductivity for the bedrock based on testing of bedrock wells OW-3R, OW-4R, OW-5R and OW-7R is 67.91 m/yr, the geometric mean of these four test results, (value reported in Haley & Aldrich's August 2001 report) in the saturated zone. The recommended input into the RESRAD model is 67.91 m/yr. Results of groundwater hydraulic conductivity in bedrock (saturated zone) was previously submitted to the NRC in GPU Nuclear letter E910-02-003, dated January 24, 2002.

R014 Saturated zone hydraulic gradient - Physical Parameter The hydraulic gradient in the bedrock based on water level information recorded on January 11, 2001 ranges between 0.02 and 0.03 (gradient between the tunnel and the river and the site to the discharge tunnel respectively). A review of water level information on June 13, 2001 indicated a decrease in the hydraulic gradient from the tunnel to the river (0.013) while the value from the site to the tunnel remained the same as that calculated for the January water level information. The recommended value input into the RESRAD model is 0.02, the average of the lower value of the tunnel to the river and the value of the site to the tunnel.

R014 Saturated zone b parameter - Physical Parameter Refer to the discussion of the zone b parameter for the contaminated zone, presented above. The recommended value input in the RESRAD model is 5.6.

R014 Water table drop rate (m/yr) - Physical Parameter Annual variation of the groundwater elevation at the SNEC facility is approximately 0.5 meters in the fill deposits and approximately 1.6 meters in the bedrock unit. This information is based on water level measurements collected over the period March 1999 to April 2001 by GPU Nuclear personnel. Although seasonal variation is up to approximately 1.6 meters, and possibly could be higher, a decline in long term groundwater elevations is expected to be significantly less, if any, since water table conditions are moderated by the strong hydrogeologic influence of the Juniata River, including existing river elevation controls. In addition, there is no unusually high consumptive use of groundwater locally. Based on this, a value of 0 m was input into the RESRAD model.

R014 Well pump intake depth (m below water table) - Physical Parameter Based on recommended well pump intake depths (Driscoll, Fletcher, Groundwater and Wells, Second Edition, 1986) and the subsurface conditions as described in Section I, the range for the well pump intake depth was input as 10 to 50 meters below the water table. Actual pump intake depths may vary based on the actual depth of the well, in addition to actual well yield and usage requirements. The value input into the RESRAD model was 30 m, the average of the above-stated range.

R014 Model: nondispersion (ND) or Mass-balance (MB) - Physical Parameter Guidelines from Appendix C - Rev 0 of the NMSS Decommissioning SRP indicate that the nondispersion approach should be acceptable when the area of contamination is known to be larger than the assumed capture area of a hypothetical well. The guidance provides a calculation to estimate the capture area of a hypothetical well, however the calculation assumes a flat water table, which, based on subsurface investigations decried in Section I, is not the case at the SNEC facility. The gradient based on data from monitoring wells collected as part of the 18 November 1992 report entitled Phase I Report of Findings - Groundwater Investigation, ranges from 0.02 to 0.04. Given static hydraulic gradient, hydraulic conductivity, and saturated thickness of the geologic strata, potential capture zone of a hypothetical well can be estimated as follows:

- *Downgradientflow boundary (null point):

O*2 ~286.2,,

XI =%2*K*b*i) = (1

/6,2;r*67.91*50*0.02) X 1 =0.67m

- *Transverseboundary (width of capture):

286.2/

• Y1 = 4.2 lm YI = Y1(* b* i) Y <=/67.91 *50*0.02) 12

Where, 3

Q = average pumping rate of RESRAD input range (m /yr)

K = average hydraulic conductivity of RESRAD input range (m/yr) b = saturated thickness of the aquifer (m) i = average hydraulicgradient of RESRAD input range (m/m)

"* Equation taken from Wellhead Protection Strategies, US Geological Society, 1991.

"* Since the transverse boundary is equivalent to a linear distance (width of capture zone), to extrapolate to a total capture area, the transverse boundary is multiplied times pi.

2 A, = YJ

• I" A, = 13.23m 2

Based on information provided by GPU Nuclear, the area of contamination ranges from 182.4 to 1,161 M . Based on the above equations, an estimate of capture zone for a hypothetical well at the SNEC facility is approximately 13.23 2

mi . Thus, the area of the contamination is greater than the capture area of a hypothetical well, and therefore the non dispersion mode was applied for the RESRAD modeling.

3 R014 Well pumping rate (m /yr) - Physical Parameter Based on data collected in the American Water Works Association Research Foundation's Residential End Use Study, 1998, the typical usage volume for a single domestic well varies from approximately 207.3 m 3

/yr to 365 m3 /yr. The value input into the RESRAD model was 286.2 m3/yr, the average of the above-stated range.

R015 Number of unsaturated zone strata - Physical Parameter As noted earlier, the contaminated zone is present to 1.0 m below ground surface for the modeled area (Figure 1).

The saturated zone begins at approximately 1.5 m below ground surface, and given the seasonal variation of the water table, the unsaturated zone exists (and varies) from 1 to 1.5 m below ground surface. During a period of one to two months in the spring water levels may be higher than throughout most of the hydrologic year resulting in a period of transient saturation. Therefore, 1 was input for the number of unsaturated zone strata.

R01 5 Unsaturated zone 1, thickness (m) - Physical Parameter As noted above, the unsaturated zone exists (and varies) from I to 1.5 m below ground surface. Therefore, the unsaturated zone thickness ranges from 0 to 0.5 m (see Figure 1). The value input into the RESRAD model was 0.25 m, the average of the above-stated range.

3 R015 Unsaturated zone 1, soil density (q/cm ) - Physical Parameter Based on subsurface investigations as described in Section I, the geologic stratigraphy at this depth is described as mixed soils, sandy or silty clay to well graded sand and gravel with rock fragments. Based on the May 1982 Department of Navy Naval Facilities Engineering Command (NAVFACI DM-7.1 Manual, dry weight density for this type of material is in the range of 80 to 120 lb./ft (or 1.28 to 1.92 g/cm ). The range for dry weight as opposed to wet, or submerged weight,3was used as the depth of soil contamination is unsaturated. The value input into the RESRAD model was 1.60 g/cm , the average of the above-stated range.

R015 Unsaturated zone 1, total porosity - Physical Parameter The total porosity range for the site in the unsaturated zone is based in three soil types (fill materials). Specifically, soil samples S-1 and S-2 from the 1981 Ground/Water Technology investigation and TB-1, similar to TB-3 from the Haley

& Aldrich geotechnical investigation 1999 were selected. Referencing Maidment, Handbook of Hydrology (pp. 5.14),

1993, the on-site soil types correspond to a range in total porosity between 0.35 and 0.56. Total porosity is defined as the part of the soil volume that is void space. The recommended value input into the RESRAD model is 0.46, the average of the above-stated range.

R015 Unsaturated zone 1, effective porosity - Physical Parameter The effective porosity range for the site was based on the soil types. Referencing Maidment, Handbook of Hydrology (pp. 5.14), 1993, the range of 0.28 to 0.54 for effective porosity is the recommended as the appropriate parameter input based on the soil types found at the site. The recommended value input into the RESRAD model is 0.41, the average of the above-stated range.

R01 5 Unsaturated zone 1, soil-specific b parameter - Physical Parameter Refer to the discussion of the zone b parameter for the contaminated zone, presented above. The recommended value input into the RESRAD model is 5.6.

R015 Unsaturated zone 1, hydraulic conductivity (m/yr) - Physical Parameter Refer to the discussion of hydraulic conductivity for the contaminated zone, presented above. As the geologic profile does not change significantly with regard to hydraulic conductivity, the input range for the contaminated zone hydraulic 13

conductivity was used again as the range for the unsaturated zone hydraulic conductivity. The recommended value types.

input into the RESRAD model is 32.3 m/yr (1 x 10-4 cm/sec), the geometric mean of three site soil RO11 Contaminated Zone Thickness (m) - Physical Parameter input into the The contaminated zone is considered to be the upper 1-meter throughout the modeled area. The value RESRAD model was therefore 1 meter.

R014 Field Capacity - Physical Parameter unsaturated soil.

Field capacity, a value included in the RESRAD 6.1 code, refers to specific retention as it applies to for soil materials classified as similar to on-site soil (Brady, The Nature &

Based on published values for field capacity of Soils, 1974) field capacity ranges from 0.079 to 0.192. The recommended value input into the RESRAD Property model is 0.136, the average of the minimum and maximum estimated values.

D-34 Food Transfer Factors - Physical Parameter soil and water.

In RESRAD, radionuclide transfer to animal products (milk and meat) is through ingestion of fodder, ratios for meat and milk are estimated by radionuclide transfer factors from fodder, soil, or The food/soil concentration water/soil ratio. These data determine water to meat or milk, daily intake, fodder/soil concentration ratio, and livestock the conservatism of dose estimation.

transport factors There are 3 types of food transfer factors used in the code. They are used to compute environmental for plant, meat, and milk pathways for each stable element of interest. These include:

(1) Plant/soil concentration ratios, dimensionless; (2) Beef/livestock-intake ratios, (pCilkg)/(pCi/d); and (3) Milk/livestock-intake ratios, (pCi/L)/(pCi/d).

the edible The plant/soil ratio is the transfer factor for root uptake. It is the ratio of radionuclide concentration in harvest time to the dry soil radionuclide concentration. It is assumed the same transfer factor portions of the plant at can be used for leafy and non-leafy vegetables.

same The beef/livestock-intake factor is the ratio of radionuclide concentration in beef to the daily intake of the radionuclide in livestock feed, water or soil.

the same The milk/livestock-intake ratio is the ratio of radionuclide concentration in milk to the daily intake of radionuclide in livestock feed, water or soil. This is also a physical parameter in the code.

as forage, In DandD, the animal products include beef, poultry, milk and eggs. The fodder for animals are divided and stored hay. RESRAD default values were used as best guess estimates for the resident farmer stored grain was a direct correlation (same value) or within an order scenario and for purposes of simplicity. In many cases there DandD and RESRAD, with RESRAD being more conservative when considering most of magnitude between predominant nuclides on the site (e.g. cesium and cobalt).

The RESRAD default transfer factors were used within a probabilistic analysis.

D-5 Bioaccumulation Factors, fresh water - Physical Parameter This factor The bioaccumulation factors are used to calculate environmental transport factors for the aquatic pathway.

the aquatic food to the concentration of the same radionuclide in is the ratio of radionuclide concentration in respect to freshwater. The two factors presented per element are for fish and crustacea and mollusks. DandD, with aquatic food, only considers fish. The units of measure are (pCi/kg)/(pCi/L) or L/kg. The bioaccumulation factor is a physical parameter in the code.

Report TR Like the food transfer factors bioaccumulation values were compared with DandD values (Reference EPRI Raystown 112874, Table B-5, November, 1999). Since sport fishing is a popular sport along the Juniata River and Lake the bioaccumulation in fish is more of a concern. The default factors used by the RESRAD code are comparable to DandD values for the predominant radionuclides on the site and therefore, were used in the analysis.

The RESRAD default bioaccumulation factors were used within a probabilistic analysis.

14

R016 Distribution coefficients for all isotopes (Kd) - Physical Parameter Contaminated zone Unsaturated zone Saturated zone Leach Rate (/yr)

Solubility Constant The distribution coefficient, Kd, is a value that refers to the ratio of mass or activity of a radionuclide present in the solid phase to the mass or activity present in solution. This is a physical parameter in the code and the units are in cm 3/gram. Radionuclide adsorption is influenced by many attributes of the geologic environment. The Kd value for different elements is quite variable, depending strongly on material/soil type, the pH, and Eh of the media, and the presence of other ions. The soil and fill material on-site is very diversified. GPU Nuclear contracted with Argonne (ANL) to provide Kd measurements for the Saxton Nuclear Experimental Corporation Facility (SNEC). A list of radionuclides of concern was provided to ANL along with various soil and construction debris samples and site groundwater. In nearly all cases, Argonne provided the data experimentally for the listed radionuclides using either radioactive or stable elements (and stand-ins) to establish relevant site Kd values. The Kd values for certain nuclides 14 (3H and C) were estimated because of the uncertainty in the chemical form that these radionuclides would exhibit in this particular environmental condition. In the latter case, the Kd values (e.g. tritium oxide) are generally very low (conservative). Results of ANL's analyses are listed in Table 3. The most conservative Kd values (Used in Table 1) were selected and applied to all materials found on the SNEC site, and therefore no probabilistic analysis was performed for site radionuclides, except for H-3 and C-14. GPU Nuclear established a minimum/maximum Kd range of 0 to 5 in the probabilistic run.

R018 Diet Parameters Diet Parameter Dimension Parameter Classification Fruits, vegetables & grain Kg/yr Metabolic, behavioral consumption Leafy vegetable consumption Kg/yr Metabolic, behavioral Milk consumption L/yr Metabolic, behavioral Meat & poultry consumption Kg/yr Metabolic, behavioral Fish consumption Kg/yr Metabolic, behavioral Other seafood consumption Kg/yr Metabolic, behavioral Soil ingestion G/yr Metabolic, behavioral Drinking water intake L/yr Metabolic, behavioral The RESRAD user input values for the above diet parameters were taken from DandD default values. The classification of animal food and human diets (including plant foods, animal products and aquatic food) in the two codes is different. RESRAD classifies plants in the human diet as two types: non-leafy vegetables (fruit, non vegetable, and grain) and leafy vegetable, and divides animal products into two types: milk and meat/poultry, and two types of aquatic food: fish and crustacea/mollusks. DandD classifies plants as four different types: leafy vegetable, roots, fruits and grains, and divides animal products into four different types: beef, poultry, eggs and milk. Aquatic food in DandD is only one type: fish.

The DandD diet parameters were modified to fit the RESRAD input fields (Reference EPRI Report TR 112874, Table B-2). For example since RESRAD does not have an input field for fruits (52.8 kg/yr), roots (44.6 kg/yr) and grain (14.4 kg/yr) these parameter values were added (112 kg/yr) and input into the appropriate RESRAD field, i.e. 'Fruits, vegetables and grain consumption.' The same is true for meat and poultry. DandD meat consumption defaults for beef (39.8 kg/yr); eggs (1.9 kg/yr) and poultry (25.3 kg/yr) were added (67 kg/yr) and inputted as 67 kg/yr into the

'Meat and poultry consumption' RESRAD field.

15

RO1 8 Contamination Fractions - Physical/Behavioral All the contamination fraction areas listed in this table are classified as physical and behavioral.

Contamination Fraction of Input Value Description Drinking water 1.0 100% of the drinking water intake is from onsite. No probabilistic analysis is performed.

Household water Not used This parameter used to calculate radon exposure. Not part of SNEC dose model.

Livestock water .75 Specifies fraction of contamination intake for livestock for meat and milk pathways. 75% of all livestock water is assumed taken from on site sources. Probabilistic input ranges from 0.5 to 1.

Irrigation water .75 Specifies fraction of contaminated intake for plant, meat and milk pathways. 75 % of all irrigation water is assumed taken from on-site sources. Probabilistic input ranges from 0.5 to 1.

Aquatic food 0.5 Specifies the fraction of intake for the fish pathway. In this case 50% of the fish intake is assumed from on-site sources (a RESRAD default value). Probabilistic input ranges from 0 to 1.

Plant food 1 In this case 100% of the plant food intake is assumed from on-site sources. No probabilistic analysis performed.

Meat 1 In this case 100% of the meat intake is assumed from on-site sources. No probabilistic analysis performed.

Milk 1 In this case 100% of the milk intake is assumed from on-site sources. No probabilistic analysis performed.

The intake fractions listed in the above table provide conservative, yet reasonable certainty for intake rates for the resident farmer scenario.

R1 9B Wet weiqht crop yields - Physical Non-leafy Leafy Fodder Dimensions are in kg/m2. These three RESRAD user input parameters are classified as physical. They represent the mass (net weight) of the edible portion of the plant food produced from per2 unit land area and are expressed in terms 2 2

of kg/m 2 . The default values are 1.5 kg/m for leafy vegetables, o.7 kg/m for non-leafy vegetables and 1.1 kg/m for fodder. These defaults are considered conservative due to the fact that the soil on the SNEC site is not conducive for producing high crop yields. These input parameters are used for estimating contaminant concentration in plant foods.

Reference Appendix D, Equation D-10 in the RESRAD Users Manual.

16

Section III Sensitivity Analyses "Twenty-two (22) RESRAD input parameters have been identified that have the biggest impact on dose. These were identified through a series of sensitivity analysis runs using RESRAD 6.1. Radiation dose from a specific radionuclide is dependent upon its type of radiation, energy, chemical form, half life and exposure pathway. The 22 input parameters have different dose impact sensitivities for different radionuclides. Therefore, Table 3 lists those parameters that have the biggest influence on dose calculations but in no particular order as far as rank.

Table 4 Sensitivity Table Thickness of Contaminated Zone Indoor Time Fraction Contaminated Zone Erosion Rate Run Off Coefficient External Gamma Shielding Factor Watershed Area for Nearby Stream or Pond Fruit, Vegetable, and Grain Consumption Contaminated Fraction of Plant Food Evapotranspiration Coefficient Well Pump Intake Depth Thickness of Unsaturated Zone Food Transfer Factors Bioaccumulation Factors Contaminated Zone Kd Saturated Zone Kd Unsaturated Zone Kd External Gamma Shielding Factor Livestock Fodder Intake for Meat Contaminated Fraction of Plant Food Contaminated Fraction of Meat Depth of Roots Leafy Vegetable Consumption 17

SKETCH OF UNDERGROUND MATERIALS GEOLOGIC RESRAD HYDROGEOLOGIC CONTAMINATED UNSATURATED (TRANSIENT SA'URATION) UNSATURATED (TRANSIENT "1.0METER SATURATION) II BELOW G.S.

SATURATED BUT PRACTICALLY III LOW GROUNDWATER LEVEL

,*(BOULDER MW OVERBURDEN LAYER WIT IMPERMEABLE OVERBURDEN 2.3 METERS SILT & CLAY IN OQID SPACE) (BOULDER LAYER)

FLOW

• _ BELOW G.S.

S ---- -(B/C SATURATED III FLOW SAXTON NUCLEAR EXPERIMENTAL FACILITY SAXTON, PENNSYLVANIA HiLEY&

FIGURE REVISION 1 I

QUESTION 5:

Criteria for Distinguishing Between "Contaminated" and "Uncontaminated Debris" - The LTP does not specifically identify what DCGLs or criteria will be used to distinguish between contaminated and uncontaminated debris.

Considering that some of the debris will be used as fill material, please specifically identify the DCGLs, or criteria that will be used for distinguishing between contaminated and uncontaminated debris. In addition, provide an appropriate basis for the selected DCGLs. It should be noted that DCGLs developed for contaminated soil may not be acceptable for contaminated debris (e.g., concrete). Therefore, an appropriate basis needs to be provided for use of these DCGLs for other contaminated media.

[LTP

References:

Section 6.2.2; Decommissioning Cost Update, SNEF, document G01-1308-002, Rev 0, Selection 3.2.1 which is appended to LTP Chapter 7.]

RESPONSE

Eight different types of media (including soils, re-fill materials and construction debris) have been assayed by Argonne National Laboratory (ANL) to determine their individual Kd values. The results of these analyses were reported in Table

3. The most conservative Kd values were selected and used as input parameters in the respective site surface and subsurface dose models. The modeling efforts have considered all KdS for the different types of site materials including re-fill materials.

a) Dose modeling efforts have been completed to determine DCGLs for surface and subsurface areas. Refer to GPU Nuclear's answer to RAI2 question 4 and Table 2 included in this submittal. Based on dose modeling and Kd assayed results, one set of conservative and generic DCGL values have been developed for both the surface and subsurface models. These DCGL values include all soil, related debris, and refill materials found on site. Re-depositing slightly contaminated building debris, re-fill materials or soils in the saturated zone have been addressed in the subsurface dose model. All materials will meet established DCGL values for the respective region (surface and subsurface). Any surface soil or debris material released using DCGLEMC values based on site Area Factors will not be used as re-fill materials without further evaluation and permission from applicable regulatory agencies.

b) A sampling program will be implemented to monitor and control residual contamination levels in re-fill materials.

The sampling program will be statistically based and be applied through the implementation of fully reviewed SNEC site procedures and/or work instructions. At least 5% of all samples collected would be analyzed for transuranic and HTD radionuclides as described in the SNEC LTP.

19

QUESTION 6:

Gross Activity DCGLs - Please develop gross activity DCGLs for surface contamination. If these DCGLs cannot be provided at this time, explain when and how gross activity DCGLs will be provided. If you do not plan to use gross activity DCGLs, explain in more detail.

[LTP

References:

Sections 5.2.3.2.3 and 5.2.3.2.4]

RESPONSE

Gross activity DCGL values will be developed by applying the methodology described in the MARSSIM manual on page 4-9, equation 4-4 (or an equivalent form). The methodology used will consider all relevant emissions exhibiting threshold energies capable of entering the detector volume and causing a detectable pulse. In-growth of daughter radionuclides will also be considered as appropriate. Calculations documenting the appropriate gross activity DCGL value(s) for a selected area will be available for review at the SNEC site, prior to the start of Final Status Survey (FSS) work.

20

QUESTION 7:

Stream Sediment as a Potential Exposure Pathway - Please either: (a) describe remediation plans for sediment in the stream bed and demonstrate that radionuclide concentrations in stream sediments do not exceed background; or (b) include stream sediment, aquatic species, man as an exposure pathway in the derivation of DCGLs.

[LTP

References:

Table 2-19; Section 6.2.2.2, 6.2.2.6; App. 6.1 Section 4]

RESPONSE

Historical wastewater discharges from the SNEC facility may have contributed to radiological contamination of the Juniata River. Work has been performed to characterize the nature and extent of possible radiological contamination by sampling sediments from likely areas where deposition may have occurred. Historical aerial photography, topographic mapping, and field reconnaissance activities were used to identify appropriate sample locations.

(Information related to this study was previously submitted to the NRC in GPU Nuclear letter E910-02-002, dated January 11, 2002.) Table 5 lists the locations where samples were obtained. A total of 52 samples were obtained at 26 sampling locations. Sampling locations covered areas of interest such as upstream background areas, near field river sites, SNEC discharge tunnel out-fall, SNEC weir line out-fall and spray pond area.

Samples were analyzed for gamma emitters (specifically Cs-137 & Co-60). In addition, 5% of the samples were analyzed for applicable transuranic (TRU) alpha emitters and hard to detect (HTD) radionuclides that are representative of site liquid discharges. Tables 6 & 7 list the results of these analyses. Table 6 results indicate Cs 137 and Co-60 concentrations below or at background for all areas except the weir out-fall. Cs-137 concentrations directly under (Weir Site #1) and in front of (Weir Site #6) where the weir pipe was located indicated an average of 1.7 pCi/g. A small 25 m2 area is estimated to be impacted and has been modeled to determine the recreation dose impact from the applicable pathways (fish, drinking water and direct) to man. Dose calculations are well below 25 mrem/yr.

There were no TRU or HTD radionuclides (See Table 7) detected above background except naturally occurring uranium. Based on these results there is no remediation planned for this area.

Appendix 1 contains the RESRAD 6.1 input parameters and subsequent dose calculation for the recreation scenario and the 25 m2 impacted area described above. The recreation scenario involves fishing (fish ingestion), swimming (drinking water ingestion) and direct (gamma dose from sediment in streambed). Recreation time is based on 67 hrs/yr per Reg. Guide 1.109. Since no other radionuclides were detected in the sediment only the dose from Cs-137 was calculated. The dose-to-source ratio was calculated to be 1.347E-3 mrem/yr per pCi/g for the fish-drinking water direct dose pathways. In this case the dose range is calculated to be 2.3E-3 to 3.4E-3 mrem/yr based on the average and peak streambed sediment concentrations of 1.7 and 2.55 pCi/g respectively.

21

Table 5 Sediment Sampling Locations Sample Longitude Sample Date Sample Time Sample Type Site Identification Identification Latitude Weir 1 SXSD1472 400 13' 42.539" 78014, 33.429" 10/10/01 855 Scoop SXSD1473 400 13' 42.539" 780 14' 33.429" 10/10/01 900 Scoop Weir 1 Weir2 SXSD1474 400 13' 43.417" 78014' 30.996" 10/10/01 1205 Scoop SXSD1475 400 13' 43.417" 780 14' 30.996" 10/10/01 1215 Scoop Weir 2 SXSD1476 400 13' 43.491" 780 14' 31.384" 10/10/01 1226 Scoop Weir 3 Weir 3 SXSD1477 400 13' 43.491" 780 14' 31.384" 10/10/01 1232 Scoop Weir 4 SXSD1478 400 13' 43.676" 780 14' 32.104" 10/10/01 1240 Scoop SXSD1479 400 13' 43.676" 780 14' 32.104" 10/10/01 1245 Scoop Weir 4 SXSD1480 400 13' 42.832" 780 14' 32.382" 10/10/01 1415 Suction Weir 5 SXSD1481 400 13' 42.832" 780 14' 32.382" 10/10/01 1420 Suction Weir 5 SXSD1545 400 13' 42.597" 780 14' 33.435" 10118101 817 Suction Weir 6 Weir 6 SXSD1546 400 13' 42.597" 780 14' 33.435" 10/18101 823 Suction 1 SXSD1482 400 13'43.548" 780 14' 34.806" 10/10/01 1502 Scoop Discharge Tunnel 1 SXSD1483 400 13' 43.548" 780 14' 34.806" 10/10/01 1508 Scoop Discharge Tunnel 2 SXSD1484 400 13' 43.561" 780 14' 35.097" 10110/01 1525 Scoop Discharge Tunnel 2 SXSD1485 400 13' 43.561" 780 14' 35.097" 10/10/01 1535 Scoop Discharge Tunnel 3 SXSD1486 400 13' 42.284" 780 14' 34.657" 10/10/01 1515 Ponar Discharge Tunnel 3 SXSD1487 400 13' 42.284" 780 14' 34.657" 10/10/01 1530 Ponar Discharge Tunnel 4 SXSD1488 400 13' 42.440" 780 14' 36.302" 10/10/01 1555 Ponar Discharge Tunnel 4 SXSD1489 400 13' 42.440" 780 14' 36.302" 10/10/01 1605 Ponar Discharge Tunnel 5 SXSD1490 400 13' 42.116" 780 14' 36.419" 10/10/01 1612 Scoop Discharge Tunnel 5 SXSD1491 400 13'42.116'" 78014' 36.4199" 10/10/01 1615 Scoop Discharge Tunnel SXSD1498 400 13' 27.614" 78014' 40.116" 10/11/01 1130 Core Spray Pond Lagoon SXSD1499 400 13' 27.614" 780 14' 40.116" 10/11/01 1155 Core Spray Pond Lagoon SXSD1500 400 13'28.015" 78014, 39.220" 10/11/01 1240 Ponar Spray Pond Bog SXSD1501 400 13' 28.015" 78' 14' 39.220" 10/11/01 1242 Ponar Spray Pond Bog 400 13' 20.197" 780 14' 35.441" 10/11/01 1310 Scoop Site 1 SXSD1502 Site 1 SXSD1503 400 13' 20.197" 78014'35.441 10/11/01 1313 Scoop SXSD1496 400 13' 30.559" 780 14' 43.783" 10/11/01 1018 Scoop Site 2 Site 2 SXSD1497 400 13' 30.559" 78014' 43.783" 10/11/01 1022 Scoop Site 3 SXSD1494 400 13' 32.130" 78014'45.129" 10/11/01 1007 Ponar Site 3 SXSX1495 400 13' 32.130" 780 14' 45.129" 10/11/01 1010 Ponar Site 4 SXSD1492 400 13' 36.644" 78014,46.519" 10/11/01 947 Scoop Site 4 SXSD1493 400 13' 36.644" 78014' 46.519" 10/11/01 954 Scoop Site 5 Deleted due to redundancy with discharge tunnel sampling.

Site 6 SXSD1506 400 13' 56.499" 780 13' 53.996" 10/15/01 1415 Core Site 6 SXSD1507 400 13' 56.499" 780 13' 53.996" 10/15/01 1430 Core Site 7 SXSD1508 400 13' 59.081" 78013'48.768" 10/15/01 1510 Core Site 7 SXSD1509 400 13' 59.081" 780 13' 48.768" 10/15/01 1532 Core Site 8 SXSD1535 400 14' 01.520" 780 13' 39.818" 10/16/01 946 Core Site 8 SXSD1536 400 14' 01.520" 780 13' 39.818" 10/16101 1014 Core Site 9 SXSD1504 400 13' 57.580" 780 13' 24.309" 10116/01 1200 Core Site 9 SXSD1505 400 13' 57.580" 780 13' 24.309" 10116101 1216 Core Site 10 SXSD1470 400 14' 16.367" 78013' 15.900" 10/9/01 1530 Core Site 10 SXSD1471 400 14' 16.367" 780 13' 15.900" 1019/01 1600 Core Site 11 SXSD1547 400 14' 54.757" 780 13' 49.096' 10/18/01 1116 Core Site 11 SXSD1548 400 14' 54.757" 780 13' 49.096" 10118/01 1200 Core BKG - 1 SXSD1537 400 09' 25.063" 780 15' 22.185" 10117101 940 Core BKG - 1 SXSD1538 400 09' 25.063" 78015' 22.185" 10/17/01 955 Core BKG -2 SXSD1539 400 12' 12.494" 780 15' 46.467" 10/17101 1300 Ponar BKG -2 SXSD1540 400 12' 12.494" 78015'46.467' 10/17/01 1315 Ponar BKG -3 SXSD1543 400 11'47.708" 78015'04.959" 10/17/01 1355 Ponar BKG -3 SXSD1544 400 11'47.708" 78015'04.959" 10/17/01 1405 Ponar 22

Table 6 Juniata River Sediment Gamma Spec Results SAMPLE ID HpGe ID # SAMPLE TIME DESCRIPTION/LOCATION Cs-137 Co-60 DATE (pCi/g) (pCi/g) 472 3-9330 10110/01 855 TE#1 2.55 < 0.08 1473 2-9329 10/10/01 900 WEIR SITE #1 1.07 < 0.06 1474 3-9327 10/10/01 1205 WEIR SITE #2 < 0.07 < 0.07 1475 2-9326 10/10/01 1215 WEIR SITE #2 0.05 < 0.055 1476 1-9325 10/10/01 1226 WEIR SITE #3 < 0.039 < 0.05 1477 1-9338 10/10101 1232 WEIR SITE #3 < 0.06 < 0.05 1478 2-9339 10/10/01 1337 WEIR SITE #4 < 0.06 < 0.05 1479 1-9328 10/10/01 1245 WEIR SITE #4 < 0.05 < 0.04 1480 1-9344 10/10/01 1415 WEIR SITE #5 0.15 < 0.04 1481 1-9345 10/10/01 1420 WEIR SITE #5 0.08 < 0.04 1545 1-9412 10118/01 817 WEIR SITE #6 1.8 < 0.05 1546 2-9413 10/18/01 823 WEIR SITE #6 1.2 < 0.07 1482 2-9346 10/10/01 1502 DISCHARGE TUNNEL #1 0.07 < 0.06 1483 2-9354 10/10/01 1508 DISCHARGE TUNNEL #1 < 0.07 < 0.07 1484 3-9352 10/10/01 1525 DISCHARGE TUNNEL #2 < 0.09 < 0.07 1485 2-9366 10/10101 1535 DISCHARGE TUNNEL #2 < 0.04 < 0.07 1486 3-9356 10/10/01 1515 DISCHARGE TUNNEL #3 < 0.05 < 0.06 1487 2-9348 10/10/01 1530 DISCHARGE TUNNEL #3 < 0.045 < 0.06 1488 1-9371 10/10/01 1555 DISCHARGE TUNNEL #4 < 0.05 < 0.04 1489 2-9372 10/10/01 1605 DISCHARGE TUNNEL #4 < 0.06 < 0.06 1490 3-9349 10/10/01 1612 DISCHARGE TUNNEL #5 < 0.06 < 0.06 1491 2-9351 10/10/01 1615 DISCHARGE TUNNEL #5 < 0.06 < 0.06 1498 1-9369 10/11/01 1130 SPRAY POND LAGOON < 0.06 < 0.05 1499 2-9364 10/11101 1155 SPRAY POND LAGOON < 0.06 < 0.07 1500 1-9367 10/11/01 1240 SPRAY POND BOG < 0.06 < 0.06 1501 1-9363 10/11/01 1242 SPRAY POND BOG < 0.14 < 0.12 1502 1-9365 10/11/01 1310 RIVER SITE #1 < 0.04 < 0.05 1503 1-9361 10/11/01 1313 RIVER SITE #1 < 0.05 < 0.05 1496 3-9358 10/11/01 1018 RIVER SITE #2 < 0.05 < 0.08 1497 3-9362 10/11/01 1022 RIVER SITE #2 < 0.1 < 0.1 1494 3-9360 10/11/01 1007 RIVER SITE #3 < 0.1 < 0.09 1495 2-9357 10/11/01 1010 RIVER SITE #3 < 0.1 < 0.09 1492 2-9370 10/11/01 947 RIVER SITE #4 < 0.08 < 0.07 1493 1-9347 10/11/01 954 RIVER SITE #4 < 0.047 < 0.057 1506 1-9397 10115/01 1415 RIVER SITE #6 0.07 < 0.04 1507 2-9399 10/15/01 1430 RIVER SITE #6 < 0.053 < 0.055 1508 1-9390 10/15101 1510 RIVER SITE #7 < 0.05 < 0.04 1508-B 2-9403 10/15/01 1510 RIVER SITE #7 < 0.06 < 0.05 1509 2-9391 10/15/01 1532 RIVER SITE #7 < 0.06 < 0.06 1509-B 1-9402 10/15/01 1532 RIVER SITE #7 < 0.04 < 0.03 1535 2-9386 10/16/01 946 RIVER SITE #8 0.09 < 0.06 1536 1-9387 10/16/01 1014 RIVER SITE #8 0.11 < 0.05

• 150 1-9392 10/15/01 1200 RIVERSITE #9 0.16 < 0.04 1505 2-9393 10/15/01 1216 RIVER SITE #9 < 0.06 < 0.06 1470 1-9333 10/9/01 1530 RIVER SITE #10 0.13 < 0.037 1471 2-9334 10/9/01 1600 RIVER SITE #10 < 0.044 < 0.04 1547 1-9420 10/18/01 1116 RIVER SITE #11 < 0.03 < 0.04 1548 2-9416 10/18/01 1200 RIVER SITE #11 < 0.049 < 0.063

'1f537 2-9419 10/17/01 940 *B1(# RDDLESBURG 0.08 < 0.07 1538 2-9421 10/17/01 955 BKG #1 RIDDLESBURG < 0.07 < 0.07 1539 2-9423 10/17/01 1300 BKG #2 WARRIORS PATH 0.07 < 0.06 1540 1-9418 10/17/01 1315 BKG #2 WARRIORS PATH 0.09 < 0.05 1543 1-9422 10/17/01 1355 BKG #3 WARRIORS PATH 0.01 < 0.04 1544 1-9414 10/17/01 1405 BKG #3 WARRIORS PATH < 0.04 < 0.05 Areas witn a < symooI are less than MUI .

• TRU analyses performed on these samples (Ref. BWXT Report #0110089).

23

Table 7 Juniata River Sediment TRU/HTD Results Results (pC i/g)

Isotope Weir #1 River Site #9 Bkg #1 (Riddlesburg)

H-3 < 1.02E+01 < 1.01E+01 < 9.62E+00 C-14 < 4.58E+00 < 4.82E+00 < 4.94E+00 Fe-55 < 1.1 9E+00 < 3.21 E-01 < 1.61_E_-0_1 Ni-59 < 5.20E+00 < 1.34E+01 < 5.74E+00 Ni-63 < 7.46E+00 < 6.94E+00 < 7.98E+00 S r-90 < 1.40E-02 < 1.001E-02 < 1. OOE-02 Tc-99 < 5.56E-01 < 2.05E+00 < 1.25E+00 1-129 < 1.35E+00 < 1.46E+00 < 1.27E+00 Np-237 < 3.41E-03 < 5.45E-03 < 1.03E-02 Pu-242 < 3.41 E-03 < 4.35E-03 < 3.56E-03 Pu-239/240 < 3.41 E-03 < 3.12E-03 < 3.56E-03 Pu-238 < 3.41 E-03 < 3.48E-03 < 3.56 E-03 Pu-241 < 9.60E-01 < 1.06E+00 < 1.15E+00 Am-243 < 5.13E-03 < 2.83E-03 < 3.5 0E-03 Am-241 < 4.89E-03 < 2.83E-03 < 3.50E-03 Cm-244 < 3.70E-03 < 3.16E-03 < 3.50E-03 Cm-242 < 5.72E-03 < 3.02E-03 < 3.72E-03 U-234 4. 0 E -0~1 5.2 9E2E -01 <7.7 0 E -01 U-235 2.3 0E-0 2 1.124E -0 2Ž 1 8 E U-238 3,#1 E-01 \:4.12

~ E-0 1 4.9 5E-0 1 Co-60 2.00E-0 2 < 2.74E-02 < 1.37E-02 Nb-94 < 1.08E-02 < 2.36E-02 < 1.1 3E-02 Sb-125 < 3.83E-02 < 5.90E-02 < 3.11 E-02 Cs-134 < 1.57E-02 < 3.86E-02 < 2.04E-02 C s - 137 2.7E+00~ 1.~#54E-01 ., 6.62E-02 Ce-144 < 8.78E-02 < 1.32E-01 < 8.73E-02 Eu-1 52 < 6.24E-02 < 1.39E-01 < 6.86E-02 Eu-154 < 4.20E-02 < 9.41E-02 < 4.66E-02 Eu- 155 < 4.69E-02 < 6.98E-02 < 3.26E-02 Shaded areas denote positive resu Its.

Areas with a < symbol are less than MDA.

Reference BWXT Report# 0110089, November 13, 2001 24

QUESTION 8:

Resident Farmer Source Term Configuration- Please revise the LTP to clarify if the configuration of contaminated material proposed for the resident farmer dose analysis takes into account any radioactive material that will be associated with buried debris and if contaminated material will be buried in the saturated zone. If contaminated material will be buried in the saturated zone, information must be provided on the effect this would have on soil DCGLs.

[LTP

References:

Table 2-19; Section 6.2.2]

RESPONSE

Soil, refill and debris materials have been analyzed by ANL to determine the respective Kd values (See Table 3).

DCGLs for the subsurface model (saturated zone) have been developed for GPU Nuclear by URS Corporation using conservative Kd values that were determined by ANL. Appendix 2 provides the URS report on calculation of the SNEC sub-surface DCGLs. The results of these subsurface DCGLs are listed in Table 8 for the respective configurations.

Surface DCGL values have also been developed by GPU Nuclear. The RESRAD input parameters used by both models were similar. Conservative KdS were selected from all the media (soil, refill and debris materials) test results and applied to both the surface and subsurface models. Results from the dose calculations showed DCGL values for gamma emitters were more conservative in the surface model while most of the alpha emitters, C-14 and H-3 values were more conservative in the subsurface model. The shaded radionuclides listed in Table 8, minimum site subsurface DCGL column, have been combined with the surface model DCGLs to form a single list of DCGLs to be used at SNEC. This new DCGL list is represented in Table 2. For the resident farmer scenario the use of these conservative DCGLs takes into account any radioactive material that will be associated with buried debris in the saturated zone. These DCGL values results will be incorporated into the next LTP revision.

Table 8 Subsurface DCGL Results

• i~ relyDCGL ahaon 25 basedal rrmyr mremlyralptwy based on 4 DCGL drinking-water DCGL based mnremnlyr on 25 all-pathway NULDSO CNENstandard standard standard Am-241 2.8E+02 4.5E+01 1.8E+011,E0 C-14 1.9E+02 3.1E+01 8.9E+01 3.1E+01 Cm-243 6.1 E+03 9.7E+02 1.2E+02 1.2E+02 Cm-244 3.5E+03 5.6E+02 1.8E+02 1.8E+02 Co-60 2.5E+05 4.1E+04 2.1 E+01 2.1E+01 Cs-134 3.5E+16 5.6E+15 2.9E+01 2.9E+01 Cs-137 5.9E+06 9.4E+05 5.1E+01 5.1E+01 Eu-152 2.5E+07 3.9E+06 5.4E+01 5.4E+01 Eu-154 6.1 E+07 9.8E+06 5.OE+01 5.OE+01 Eu-155 4.8E+09 7.7E+08 2.1 E+03 2.1 E+03 Fe-55 7.6E+22 7.6E+22 1.7E+05 1.7E+05 H-3 8.6E+03 1.4E+03 8.9E+03 1E Nb-94 2.3E+03 3.7E+02 3.8E+01 3.8E+01 Ni-59 1.3E+06 2.1 E+05 1.7E+04 1.7E+04 Ni-63 1.6E+07 2.5E+06 6.3E+03 6.3E+03 Pu-238 4.2E+01 6.7E+00OH 1.O1E+02 ... 00 Pu-239 9.4E+00 1.5E+00 1.011+02 Pu-240 9.7E+00 1_6E+00 1.OE+02 ,,,E+0 Pu-241 7.OE+03 1.1E+03 3.4E+03 1.1E+03 Pu-242 9.7E+00 1.6E+00 1.1 E+02 1,6E+00 Sb-125 1.0E+02 1.6E+01 1.5E+02 1.6E+01 Sr-90 2.6E+01 4.2E+00 7.OE+00 4 2E+00 Tc-99 2.1 E+02 3.3E+01 5.4E+01 3 3E+01 U-234 1.2E+01 1.9E+00 4.6E+02 U-235 1.2E+01 1.9E+00 2.5E+02 1 9+

U-238 1.2E+02 2.OE+00 1.4E+03 " -0 Nuclide Specific Activity Limit

• ~Shaded minimum DCGL values combined with site surface model DCGL list.

25

QUESTION 9:

Water Resources- Surface Water and Sediments - Please provide additional information (i.e. sample data from outfall sediments) regarding the potential presence of alpha emitters at historic outfalls.

[LTP

References:

Chapter 8 of the LTP-- See section 5.5 pp. 5-3 through 5-5 of the "SNEC Facility Decommissioning Env Report, Rev 1, Feb 2000." Also, Chapter 5.0 of the LTP, section 5.2.1. Alpha emitters are also indirectly referenced in LTP when (TRU) nuclides are listed in Table 2-1, pg. 2-24; mentioned in section 5.2.1; pg. 5-2; Table 5 1, pg. 5-6; and Table 5-4, pg. 5-19. Furthermore sections 2.2.4.5, Groundwater, through Section 2.3.1, Summary of Soil Results, focus the discussion of gamma emitting radionuclides. However, the TRU nuclides are not discussed.

Finally, section 5.5.3.6, Hard-to-detect Radionuclides, discusses gamma detection but does not discuss either alpha or beta detection.

RESPONSE

Reference GPU's response to RAI2, question 7 and Tables 5, 6 & 7 included in this submittal. Analyses for alpha 6

emitting radionuclides were conducted on samples taken from the Juniata river at three locations, i.e. approximately miles upstream (Bkg #1 Riddlesburg) from SNEC, the weir discharge out-fall (Weir Site #1) and a sediment bed (Site

1. 9) approximately 1.4 miles downstream from the site. There were no alpha emitting radionuclides detected in any of the samples except naturally occurring uranium (Table 7).

Table 5 lists the locations of the two historical outfalls, i.e. the Discharge Tunnel and the Weir site, from which riverbed and shoreline sediment samples were obtained. Twenty-two (22) samples were taken from these two outfall areas and screened for radioactivity above background (Table 6). The presence of Cs-137 activity was used as an indicator to determine if additional analyses for alpha emitters should be conducted. Upstream and downstream samples were also evaluated.

All samples taken in the vicinity of the Discharge Tunnel outfall were less or equal to 0.07 pCi/g Cs-1 37, well below typical background concentrations. Therefore, analyses for alpha emitters were not performed.

The Weir site, which is approximately 300 feet downstream of the Discharge Tunnel, had a sample, which indicated the presence of elevated Cs-137 activity. This sediment sample had the highest Cs-137 concentration (2.55 pCi/g) and was analyzed for alpha emitters.

Another location (Site 9 near field), downstream of the Weir site, was selected to have its sample analyzed for alpha emitters for two reasons.

1.) It was located in the vicinity of a recessed area along the right bank of the Juniata River. It was determined that such a recessed area could have been an important depositional feature during the operational period of the SNEC facility. After probing the substrate in this area a significant core sample of soft sediment deposit was obtained.

2.) Cs-137 concentration in this sample was 0.16 pCi/g, the highest concentration of all near field river samples.

26

Appendix I RESRAD 6.1 Calculation for Juniata River Recreation Dose 27

RESRAD, Version 6.1 Tlc Limit = 0.5 year 01/28/2002 09:05 Paqe 1 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Table of Contents Part I: Mixture Sums and Sinqle Radionuclide Guidelines Dose Conversion Factor (and Related) Parameter Summary ... 2 Site-Specific Parameter Summary .......................... 3 6

Summary of Pathway Selections ............................ 7 Contaminated Zone and Total Dose Summary .................

Total Dose Components 8 Time = 0.OOOE+00 .................................... 9 Time = 1.OOQE+00 .................................... 10 Time = 3.OOOE+00 .................................... 11 Time = 1.OOOE+01 .................................... 12 Time = 3.OOCE+01 .................................... 13 Time = 1.OCO E+02 .................................... 14 Time = 3.OOOE+02 .................................... 15 Time = 1.OOOE+03 .................................... 16 Dose/Source Ratios Summed Over All Pathways .............. 16 Sinqle Radionuclide Soil Guidelines ...................... 17 Dose Per Nuclide Summed Over All Pathways ................ 17 Soil Concentration Per Nuclide ...........................

>0 se/5oA.rc* 'c.4to

- [162 MC

T; Limit = 0.5 year 01/28/2002 09:05 Paqe 2 RESRAD, Version 6.1 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Dose Conversion Factor (and Related) Parameter Summary File: FGR 13 Morbidity Current Parameter Value Default Name Menu Parameter B-I Dose conversion factors for inhalation, mrem/pCi:

B-1 Cs-137+D 3.190E-05 3.190E-05 DCF2( 1)

D-1 Dose conversion factors for inqestion, mrem/pCi:

D-1 Cs-137+D 5.000E-05 5.000E-05 DCF3( 1)

D-34 Food transfer factors:

D-34 Cs-137+D , plant/soil concentration ratio, dimensionless 4.000E-02 4.000E-02 RTF( 1,1)

Cs-137+D , beef/livestock-intake ratio, (pCi/kq)/(pCi/d) 3.000E-02 3.OOOE-02 RTF( 1,2)

D-34 (pCi/L)/(pCi/d) 8.000E-03 8.000E-03 RTF( 1,3)

D-34 Cs-137+D , milk/livestock-intake ratio, D-5 Bioaccumulation factors, fresh water, L/kq:

D-5 Cs-137+D , fish 2.000E+03 2.000E+03 BIOFAC( 1,I) 1.000E+02 1.000E+02 BIOFAC( 1,2)

D-5 Cs-137+D , crustacea and mollusks

RESRAD, Version 6.1 T7 Limit = 0.5 year 01/28/2002 09:05 Page 3 File: riverrecdose.RAD Summary : Juniata River Recreation Dose Site-Specific Parameter Summary User Used by RESRAD Parameter Name Input Default (If different from user input) rvIn i Parameter Menu_ __ _ _ _ __ _ _ _ __ _ _ _ __ _ _II

2. 500E+01 1. OOOE+04 THICKO R011 Area of contaminated zone (m**2) 3. 0OOE-01 2. OOOE+00 R011 Thickness of contaminated zone (m) LCZPAQ

5. 640E+00 1. OOOE+02 BRDL R011 Length parallel to aquifer flow (m) 2. 500E+01 2. 500E+01 R011 Basic radiation dose limit (mrem/yr) TI R011 0. OOOE+00 0. OOOE+00 T( 2)

Time since placement of material (yr) 1. OOOE+00 1. OOOE+00 R011 Times for calculations (yr) T( 3)

R011 3. OOOE+00 3. OOOE+00 T( 4)

Times for calculations (yr) 1. OOOE+01 1. OOOE+01 R011 Times for calculations (yr) T( 5)

R011 3. OOOE+01 3. OOOE+01 T( 6)

Roll Times for calculations (yr) 1. OOOE+02 1 . OOOE+02 Times for calculations (yr) T( 7)

R011 3. OOOE+02 3. OOOE+02 T( 8)

R011 Times for calculations (yr) 1. OOOE+03 1. OOOE+03 Times for calculations (yr) T( 9)

R011 not used 0. OOOE+00 T(10)

R011 Times for calculations (yr) not used 0. OOOE+00 Times for calculations (yr)

Sl( 1)

R012 Cs-137 1.OOOE+00 0. OOOE+00 Wl( 1)

R012 Initial principal radionuclide (pCi/q): 0. OOOE+00 (pCi/L): Cs-137 not used Concentration in groundwater COVERO R013 3.OO0E-01 0. OOOE+00 DENSCV R013 Cover depth (m). 1.OOOE+00 1. 500E+00 Density of cover material (q/cm**3) VCV R013 0.OOOE+00 1. OOOE-03 Cover depth erosion rate (m/yr) DENSCZ R013 1.600E+00 1. 500E+00 VCZ R013 Density of contaminated zone (q/cm**3) 3.OOOE-04 1. 0OOE-03 Contaminated zone erosion rate (m/yr) TPCZ R013 4.600E-01 4 .OOOE-01 FCCZ R013 Contaminated zone total porosity 1.360E-01 2 .OOE-01 Contaminated zone field capacity HCCZ R013 3.230E+01 1. OOOE+01 BCZ R013 Contaminated zone hydraulic conductivity (m/yr) 5.600E+00 5. 300E+00 Contaminated zone b parameter WIND R013 1.OOOE-04 2. OOOE+00 HUMID R013 Average annual wind speed (m/sec) not used 8 .OOOE+00 Humidity in air (q/m**3) EVAPTR R013 0.OOOE+00 5. OOBE-01 PRECIP R013 Evapotranspiration coefficient 1.OOOE-05 1. OOOE+00 Precipitation (m/yr) RI R013 0.OOOE+00 2. OOE-01 IDITCH R013 Irrigation (m/yr) overhead overhead Irrigation mode RUNOFF R013 0.OOOE+00 2.OO0E-01 WAREA R013 Runoff coefficient 1.OOOE-04 1.OOOE+06 Watershed area for nearby stream or pond (m**2) EPS R013 1.OOOE-03 1.OOOE-03 Accuracy for water/soil computations DENSAQ R014 1.600E+00 1.500E+00 TPSZ Density of saturated zone (q/cm**3) 3.600E-01 4.OOOE-01 R014 Saturated zone total porosity EPSZ R014 2.800E-02 2.OOBE-01 FCSZ Saturated zone effective porosity 1.360E-01 2.OOOE-01 R014 Saturated zone field capacity HCSZ R014 6.791E+01 1.OOOE+02 HGWT Saturated zone hydraulic conductivity (m/yr) 2.OOOE-02 2.OOOE-02 R014 Saturated zone hydraulic gradient BSZ R014 5.600E+00 5.300E+00 VWT Saturated zone b parameter 1.000E-03 1.OOOE-03 R014 Water table drop rate (m/yr) DWIBWT R014 1.000E-05 1.OOOE+01 MODEL R014 Well pump intake depth (m below water table) ND ND Model: Nondispersion (ND) or Mass-Balance (MB) UW R014 0.OOOE+00 2.500E+02 Well pumping rate (m**3/yr)

NS R015 0 1 Number of unsaturated zone strata

RESRAD, Version 6.1 T- Limit = 0.5 year 01/28/2002 09:05 Page 4 File: riverrecdose.RAD Summary : Juniata River Recreation Dose Site-Specific Parameter Summary (continued)

User Used by RESRAD Parameter (If different from user input) Name M~ nl Parameter Input Default Menu Parameter R016 Distribution coefficients for Cs-137 DCNUCC( 1)

R016 Contaminated zone (cm**3/q) 2 . 131E+03 1. 000E+03 DCNUCS( 1)

2. 131E+03 1. OOOE+03 1)

R016 Saturated zone (cm**3/q) 9. 776E-09 ALEACH(

0. OOOE+00 0. OOOE+00 1)

R016 Leach rate (/Vr) not used SOLUBK(

0. OOOE+00 0. OOOE+00 R016 Solubility constant not used 8.400E+03 INHALR R017 Inhalation rate (m**3/Vr) MLINH not used 1 . OOOE-04 ED R017 Mass loading for inhalation (q/m**3) 1.OOOE+00 3. OOOE+01 R017 Exposure duration (Ye) SHF3 not used 4 . OOOE-01 SHFI R017 Shieldinq factor, inhalation 7. OOOE-01 7.0O0E-01 R017 Shielding factor, external gamma 5. 0OOE-01 FIND 0.OOOE+00 FOTD R017 Fraction of time spent indoors 2.500E-01 67 7.650E-03 R017 Fraction of time spent outdoors (on site) b Y" 1.000E+00 1. OOOE+00 >0 shows circular AREA. FS R017 Shape factor flaq, external gamma R017 Radii of shape factor array (used if FS = -1): RAD SHAPE(

not used 5. 000E+01 R017 Outer annular radius (m), ring 1: RAD SHAPE(

not used 7. 071E+01 R017 Outer annular radius (m), ring 2: RAD SHAPEC not used 0. OOOE+00 R017 Outer annular radius (m), ring 3: RAD SHAPE(

not used 0. OOOE+00 R017 Outer annular radius (m), ring 4: RAD SHAPE(

not used 0. OOOE+00 R017 Outer annular radius (m), ring 5: RAD SHAPE(

6: not used 0. 000E+00 R017 Outer annular radius (m), ring

0. OOOE+00 RAD SHAPE(

7: not used RAD SHAPE(

R017 Outer annular radius (m), ring 0.OOOE+00 8: not used RAD SHAPE(

R017 Outer annular radius (m), ring

0. OOOE+00 9: not used RAD SHAPE 1 R017 Outer annular radius (m), ring 0.OOOE+00 not used RAD SHAPE (1 R017 Outer annular radius (m), ring 10: not used 0. OOOE+00 R017 Outer annular radius (m), ring 11: 0. OOOE+00 RADSHAPE(1 ring 12: not used R017 Outer annular radius (m),

R017 Fractions of annular areas within AREA: 1. OOOE+00 FRACA( 1)

Ring 1 not used FRACA( 2)

R017 not used 2.732E-01 R017 Ring 2 FRACA( 3)

Ring 3 not used 0. 000E+00 FRACA( 4)

R017 not used 0. 000E+00 R017 Ring 4 FRACAC 5) not used 0.000E+00 R017 Ring 5 0. 000E+00 FRACA( 6)

Ring 6 not used FRACA( 7)

R017 not used 0. 000E+00 R017 Ring 7 FRACA( 8)

Ring 8 not used 0. OOOE+00 FRACA( 9)

R017 not used 0. OOOE+00 R017 Ring 9 FRACA (10)

Ring 10 not used 0. OOOE+00 FRACA11)

R017 not used 0. OOOE+00 R017 Ring 11 FRACA(12) not used 0. OOOE+00 R017 Ring 12 DIET (1) not used 1. 600E+02 R018 Fruits, vegetables and grain consumption (kq/yr) DIET(2) not used 1. 400E+01 DIET(3)

R018 Leafy vegetable consumption (kq/vr) not used 9. 200E+01 R018 Milk consumption (L/yr) DIET(4) not used 6. 300E+01 DIET(5)

R018 Meat and poultry consumption (kq/vr) 2. 060E+01 5. 400E+00 R018 Fish consumption (kq/yr) OOOE-01 DIET(6) 0.000E+00 9.

R018 Other seafood consumption (kq/vr) SOIL not used 3. 650E+01 R018 Soil ingestion rate (q/yr) 5.000E+00 5. 100E+02 DWI R018 Drinking water intake (L/yr)("ning 47 MVlwtyr) 1.000E+00 1. OOOE+00 FDW R018 Contamination fraction of drinking water

RESRAD, Version 6.1 T- Limit = 0.5 year 01/28/2002 09:05 Paqe 5 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Site-Specific Parameter Summary (continued)

User Used by RESRAD Parameter Input Default (If different from user input) Name Menu Parameter

______ I I- I-not used 1. 000E+00 FHHW R018 Contamination fraction of household water FLW R018 Contamination fraction of livestock water not used 1. 000E+00 not used 1. 000E+00 FIRW R018 Contamination fraction of irrigation water FR9 R018 Contamination fraction of aquatic food 1.OOOE+00 5. 000E-01 not used -1 FPLANT R018 Contamination fraction of plant food FMEAT R018 Contamination fraction of meat not used -1 not used -1 FMILK R018 Contamination fraction of milk not used 6. 800E+01 LFI5 R019 Livestock fodder intake for meat (kq/day) LFI6 R019 Livestock fodder intake for milk (kq/day) not used 5. 500E+01 not used 5. OOOE+01 LWI5 R019 Livestock water intake for meat (L/day) LWI 6 R019 Livestock water intake for milk (L/day) not used 1. 600E+02 not used 5. 000E-01 LSI R019 Livestock soil intake (kq/day) MLFD R019 Mass loading for foliar deposition (q/m**3) not used 1.000E-04 not used 1. 5O0E-01 DM R019 Depth of soil mixing layer (m) DROOT R019 Depth of roots (m) not used 9. 000E-01 1.000E+00 1. 000E+00 FGWDW R019 Drinking water fraction from ground water FGWHH R019 Household water fraction from ground water not used 1. u00E+00 not used 1. 000E+00 FGWLW R019 Livestock water fraction from ground water FGWIR R019 Irrigation fraction from ground water not used 1. 000E+00 R19B Wet weight crop yield for Non-Leafy (kq/m**2) not used 7 . 0OOE-01 YV (1) not used 1. 500E+00 YV (2)

R19B Wet weight crop yield for Leafy (kq/m**2) YV (3)

Rl9B Wet weight crop yield for Fodder (kq/m**2) not used 1. 100E+00 not used 1.700E-01 TE(1)

RI9B Growing Season for Non-Leafy (years) TE(2)

R19B Growing Season for Leafy (years) not used 2. 500E-01 not used 8. 000E-02 TE (3)

RI9B Growing Season for Fodder (years) TIV(1)

RI9B Translocation Factor for Non-Leafy not used 1. 000E-01 not used 1. 000E+00 TIV (2)

R19B Translocation Factor for Leafy TIV(3)

R19B Translocation Factor for Fodder not used 1. 000E+00 not used 2.500E-01 RDRY (1)

R19B Dry Foliar Interception Fraction for Non-Leafy RDRY (2)

R19B Dry Foliar Interception Fraction for Leafy not used 2. 500E-01 not used 2. 5O0E-01 RDRY (3)

RI9B Dry Foliar Interception Fraction for Fodder RWET (1)

R19B Wet Foliar Interception Fraction for Non-Leafy not used 2. 500E-01 not used 2. 500E-01 RWET (2)

RI9B Wet Foliar Interception Fraction for Leafy RWET (3)

Rl9B Wet Foliar Interception Fraction for Fodder not used 2. 500E-01 not used 2. OOOE+01 WLAM RI9B Weathering Removal Constant for Vegetation not used 2. 000E-05 C12WTR C14 C-12 concentration in water (g/cm**3) C12CZ C-12 concentration in contaminated soil (q/q) not used 3. 000E-02 C14 CSOIL C14 Fraction of vegetation carbon from soil not used 2. 000E-02 not used 9.800E-01 CAIR C14 Fraction of vegetation carbon from air DMC C14 C-14 evasion layer thickness in soil (m) not used 3. 000E-01 not used 7. 000E-07 EVSN C14 C-14 evasion flux rate from soil (1/sec) REVSN C14 C-12 evasion flux rate from soil (1/sec) not used 1. 000E-10 not used 8. 000E-01 AVFG4 C14 Fraction of grain in beef cattle feed AVFG5 C14 Fraction of grain in milk cow feed not used 2 . 000E-01 not used 8.8 94E+01 C02F C14 DCF correction factor for gaseous forms of C14 STOR Storage times of contaminated foodstuffs (days): STORT(1)

STOR Fruits, non-leafy vegetables, and grain 1.400E+01 1. 400E+01

, A

RESRAD, Version 6.1 Ti Limit = 0.5 year 01/28/2002 09:05 Page 6 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Site-Specific Parameter Summary (continued)

User Used bV RESRAD Parameter Input Default (If different from user input) Name Menu Parameter 1_ 1 _ _ __ _ _ 1 _ _ _ __ _ _ i

1. OOOE+00 1.000E+00 STOR T (2)

STOR Leafy veqetables STOR T (3)

STOR Milk 1. 0OOE+00 1. OOOE+00

2. OOOE+01 2 OOOE+01 STOR T (4)

STOR Meat and poultry STOR T (5)

STOR Fish 7. 000E+00 7 000E+00

7. 000E+00 7 000E+00 STOR T (6)

STOR Crustacea and mollusks STOR T (7)

STOR Well water 1. 000E+00 1 000E+00

1. 000E+00 1.OOOE+00 STOR T (8)

STOR Surface water STORT (9)

STOR Livestock fodder 4. 500E+01 4. 500E+01 not used 1.500E-01 FLOOR1 R021 Thickness of building foundation (m) DENSFL R021 Bulk density of buildinq foundation (q/cm**3) not used 2.400E+00 not used 4 . 000E-01 TPCV R021 Total porosity of the cover material TPFL R021 Total porosity of the building foundation not used 1. OOOE-01 not used 5. OOOE-02 PH20CV R021 Volumetric water content of the cover material 3. OOOE-02 PH2OFL R021 Volumetric water content of the foundation not used R021 Diffusion coefficient for radon gas (m/sec): DIFCV R021 in cover material not used 2. OOOE-06 not used 3. 000E-07 DIFFL R021 in foundation material DIFCZ R021 in contaminated zone soil not used 2.OOOE-06 not used 2. OOOE+00 HMIX R021 Radon vertical dimension of mixinq (m) REXG R021 Average building air exchange rate (i/hr) not used 5. 000E-01 not used 2. 500E+00 HRM R021 Height of the building (room) (m) FAI R021 Building interior area factor not used 0. OOOE+00 not used -1.000E+00 DMFL R021 Building depth below ground surface (m) EMANA (1)

R021 Emanating power of Rn-222 gas not used 2. 500E-01 not used 1. 500E-01 EMANA (2)

R021 Emanating power of Rn-220 gas 32 NPTS TITL Number of graphical time points LYMAX TITL Maximum number of integration points for dose 17 1 KYMAX TITL Maximum number of integration points for risk .1 ____________ J _____________ ____________________________________

Summary of Pathway Selections Pathway User Selection 1 -- external gamma active 2 -- inhalation (w/o radon) suppressed 3 -- plant ingestion suppressed 4 -- meat ingestion suppressed 5 -- milk ingestion suppressed 6 -- aquatic foods active 7 -- drinking water active 8 -- soil ingestion suppressed 9 -- radon suppressed Find peak pathway doses active

RESRAD, Version 6.1 T; Limit = 0.5 year 01/28/2002 09:05 Paqe 7 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Contaminated Zone Dimensions Initial Soil Concentrations, pCi/q Area: 25.00 square meters Cs-137 1 . OOOE+00 Thickness: 0.30 meters Cover Depth: 0.30 meters Total Dose TDOSE(t), mrem/yr Basic Radiation Dose Limit = 2.500E+01 mrem/yr Total Mixture Sum M(t) = Fraction of Basic Dose Limit Received at Time (t)

1. OOOE+00 3. 000E+00 1. OOOE+01 3. OOOE+01 1. 000E+02 3. OOOE+02 1. 000E+03 t (years) 0. 000E+00 1.315E-06 1. 244E-13

1. 347E-03 1. 316E-03 1.257E-03 1. 069E-03 6.734E-04 1. 336E-04 TDOSE (t) 5. 344E-06 5. 261E-08 4. 977E-15 M(t) 5.387E-05 5. 264E-05 5. 026E-05 4.276E-05 2. 693E-05 Maximum TDOSE(t): 1.347E-03 mrem/yr at t = 0.000E+00 years

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Paqe 8 File: riverrecdose.RAD Summary : Juniata River Recreation Dose Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides Wi) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 0.OOOE+00 years Water Independent Pathways (Inhalation excludes radon)

Plant Meat Milk Soil Ground Inhalation Radon Radio mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

Nuclide mrem/yr 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.000E+00 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Cs-137 1. 347E-03 0.000E+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Total 1. 347E-03 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 0.OOOE+00 years Water Dependent Pathways Radon Plant Meat Milk All Path Water Fish Radio mrem/yr fract. mrem/yr fract. mrem/yr mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

Nuclide 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 347E-03 Cs-137 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 347E-03 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Total

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T; Limit = 0.5 year 01/28/2002 09:05 Paqe 9 File: riverrecdose.RAD Summary : Juniata River Recreation Dose Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.000E+00 years Water Independent Pathways (Inhalation excludes radon)

Plant Meat Milk Soil Ground Inhalation Radon Radio mrem/yr fract. mrem/vr fract. mrem/yr Nuclide mrem/yr fract. mrem/yr fract. mrem/vr fract. mrem/yr fract.

0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 Cs-137 1.316E-03 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0 .000E+00 Total 1.316E-03 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+00 years Water Dependent Pathways Meat Milk All Path Water Fish Radon Plant Radio mrem/yr fract. mrem/yr fract. mrem/yr Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

0.000E+00 0.0000 0.000E+00 0.0000 1.316E-03 Cs-137 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 1. 316E-03 Total 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T1/2 Limit = 0.5 year 01/28/2002 09:05 Paqe 10 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.OOOE+00 years Water Independent Pathways (Inhalation excludes radon)

Ground Inhalation Radon Plant Meat Milk Soil Radio mrem/yr Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

O.OOOE+00 0.0000 0. OOOE+00 Cs-137 1.257E-03 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 O.OOOE+00 0.0000 0. OOOE+00 Total 1.257E-03 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.OOOE+00 years Water Dependent Pathways Radon Plant Meat Milk All Path Water Fish Radio mrem/yr fract. mrem/Vr fract. mrem/Vr Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 257E-03 Cs-137 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1.257E-03 Total 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Paqe 11 Summary : Juniata River Recreation Dose File: riverrecdose. RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+01 years Water Independent Pathways (Inhalation excludes radon)

Ground Inhalation Radon Plant Meat Milk Soil Radio mrem/yr fract. mrem/yr Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

0.000E+00 0.0000 0. 000E+00 Cs-137 1. 069E-03 1.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0. 000E+00 Total 1. 069E-03 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.000E+01 years Water Dependent Pathways Fish Radon Plant Meat Milk All Path Water Radio mrem/yr mrem/yr fract. mrem/yr fract. mrem/yr fract.

Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract.

0.0000 0.000E+00 0.0000 1. 069E-03 Cs-137 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.OOOE+00 0.0000 1.069E-03 Total 0.000E+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Paqe 12 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.OOOE+01 years Water Independent Pathways (Inhalation excludes radon)

Meat Milk Soil Ground Inhalation Radon Plant Radio mrem/yr fract. mrem/yr Nuclide mrem/yr fract. mrem/yr fract. mrem/vr fract. mrem/yr fract. mrem/yr fract.

0.000E+00 0.0000 0. OOOE+00 Cs-137 6.734E-04 1.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 Total 6.734E-04 1.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.OOOE+01 years Water Dependent Pathways Water Fish Radon Plant Meat Milk All Path Radio mrem/yr fract. mrem/yr Nuclide mrem/yr fract. mrem/vr fract. mrem/yr fract. mrem/yr fract. mrem/Vr fract.

0.000E+00 0.0000 6.734E-04 Cs-137 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 6.734E-04 Total 0.000E+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Paqe 13 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+02 years Water Independent Pathways (Inhalation excludes radon)

Plant Meat Milk Soil Ground Inhalation Radon Radio mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/Vr fract. mrem/yr fract.

Nuclide mrem/vr fract. mrem/vr 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 Cs-137 1.336E-04 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Total 1.336E-04 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+02 years Water Dependent Pathways Fish Radon Plant Meat Milk All Path Water Radio mrem/yr fract. mrem/yr fract. mrem/yr mrem/yr fract. mrem/yr fract. mrem/vr fract. mrem/Vr fract.

Nuclide 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 336E-04 0.000E+00 0.0000 O.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Cs-137 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1.336E-04 Total 0.OOOE+00 0.0000 O.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 TI Limit = 0.5 year 01/28/2002 09:05 Paqe 14 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.OOOE+02 years Water Independent Pathways (Inhalation excludes radon)

Plant Meat Milk Soil Ground Inhalation Radon Radio mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/vr fract. mrem/yr fract.

Nuclide mrem/yr 0.OOOE+00 0.0000 0. 000E+00 Cs-137 1.315E-06 1.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.000E+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 1.315E-06 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 Total Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 3.000E+02 years Water Dependent Pathways Fish Radon Plant Meat Milk All Path Water Radio mrem/Vr fract. mrem/vr Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract.

0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 315E-06 Cs-137 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1. 315E-06 Total 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Paqe 15 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+03 years Water Independent Pathways (Inhalation excludes radon)

Ground Inhalation Radon Plant Meat Milk Soil Radio Nuclide mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/yr Cs-137 1.244E-13 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. OOOE+00 0.0000 0. OOOE+00 Total 1.244E-13 1.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0. 000E+00 0.0000 0. OOOE+00 Total Dose Contributions TDOSE(i,p,t) for Individual Radionuclides (i) and Pathways (p)

As mrem/yr and Fraction of Total Dose At t = 1.OOOE+03 years Water Dependent Pathways Water Fish Radon Plant Meat Milk All Path Radio Nuclide mrem/yr fract. mrem/vr fract. mrem/vr fract. mrem/yr fract. mrem/yr fract. mrem/yr fract. mrem/vr Cs-137 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1.244E-13 Total 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 0.OOOE+00 0.0000 1.244E-13

• Sum of all water independent and dependent pathways.

RESRAD, Version 6.1 T* Limit = 0.5 year 01/28/2002 09:05 Page 16 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Dose/Source Ratios Summed Over All Pathways Parent and Progeny Principal Radionuclide Contributions Indicated Product Branch DSR(j,t) (mrem/yr)/(pCi/q)

Parent (i) (1) Fraction* t= 0.000E+00 1.000E+00 3.OOOE+00 1.000E+01 3.OOOE+01 1.000E+02 3.OOOE+02 1. OOOE+03 Cs-137 Cs-137 1.OOOE+00 1.347E-03 1.316E-03 1.257E-03 1.069E-03 6.734E-04 1.336E-04 1.315E-06 1.244E-13

• Branch Fraction is the cumulative factor for the j't principal radionuclide daughter: CUMBRF(j) BRF(1)*BRF(2)* ... BRF(j).

The DSR includes contributions from associated (half-life

• 0.5 yr) daughters.

Single Radionuclide Soil Guidelines G(i,t) in pCi/q Basic Radiation Dose Limit = 2.500E+01 mrem/yr Nuclide (i) t= 0.OOOE+00 1.OOOE+00 3. OOOE+00 1. OOOE+01 3. OOOE+01 1. OOOE+02 3. OOOE+02 1. OOOE+03 Cs-137 1.856E+04 1.900E+04 1. 990E+04 2. 339E+04 3. 713E+04 1. 871E+05 1. 901E+07 "*8.701E+13

• At specific activity limit Summed Dose/Source Ratios DSR(i,t) in (mrem/vr)/(pCi/q) and Single Radionuclide Soil Guidelines G(i,t) in pCi/q at tmin = time of minimum single radionuclide soil guideline and at tmax = time of maximum total dose = 0.OOOE+00 years Nuclide Initial tmin DSR(i,tmin) G(i,tmin) DSR(i,tmax) G(i,tmax)

(i) (pCi/q) (years) (pCi/q)

Cs-137 1. OOOE+00 0. OOOE+00 1. 347E-03 1.856E+0 1.347E-03 1.856E+04

RESRAD, Version 6.1 T; Limit = 0.5 year 01/28/2002 09:05 Paqe 17 Summary : Juniata River Recreation Dose File: riverrecdose.RAD Individual Nuclide Dose Summed Over All Pathways Parent Nuclide and Branch Fraction Indicated Nuclide Parent BRF(i) DOSE(j,t), mrem/yr (j) (i) t= 0.000E+00 1.000E+00 3.OOOE+00 1.OOOE+01 3.OOOE+01 1.000E+02 3.OOOE+02 1.000E+03 Cs-137 Cs-137 1.OOOE+00 1.347E-03 1.316E-03 1.257E-03 1.069E-03 6.734E-04 1.336E-04 1.315E-06 1.244E-13 BRF(i) is the branch fraction of the parent nuclide.

Individual Nuclide Soil Concentration Parent Nuclide and Branch Fraction Indicated Nuclide Parent BRF(i) S(j,t), pCi/q t= 0.000E+00 1.000E+00 3.000E+00 1.OOOE+01 3.OOOE+01 1.OOOE+02 3.000E+02 1.OOOE+03 (M) (i)

Cs-137 Cs-137 1.OOOE+00 1.000E+00 9.772E-01 9.330E-01 7.937E-01 5.000E-01 9.921E-02 9.766E-04 9.240E-11 BRF(i) is the branch fraction of the parent nuclide.

RESCALC.EXE execution time = 258.70 seconds

Appendix 2 Calculation of Sub-Surface DCGLs for the Saxton Nuclear Experimental Corporation Site.

28

RAE-42613-003-5030-2 DRAFT FINAL CALCULATION OF SUB-SURFACE DCGLs FOR THE SAXTON NUCLEAR EXPERIMENTAL CORPORATION SITE Preparedfor GPU Nuclear, Inc.

Route 441 South Middletown, PA 17057-0480 January 29, 2002 ROGERS & ASSOCIATES ENGINEERING BRANCH URS CORPORATION 756 East Winchester Street, Suite 400 Salt Lake City, UT 84107

TABLE OF CONTENTS Chapter Pane No.

INTRODUCTION 1-1 1.1 Contamination History 1-1 1.2 Objective and Scope 1-4 2 CONCEPTUAL MODEL 2-1 2.1 Site Hydrogeology 2-1 2.2 Areas of Concern 2-4 2.2.1 CV Area 2-4 2.2.2 Steam Plant Area 2-6 2.2.3 Spray Pond Area 2-7 2.2.4 Juniata River 2-7 2.3 Radiation Exposure Scenarios and Transport Pathways 2-8 2.3.1 Residential Scenarios in the CV, Steam Plant, and Spray Pond Areas 2-8 2.3.2 Recreation Scenario for the Juniata River 2-10 3 CALCULATION MODELS 3-1 3.1 Calculations with RESRAD 6.1 3-2 3.1.1 Overburden Layer 3-4 3.1.2 Bedrock Layer 3-6 3.2 Spreadsheet-Based Calculations with MicroShield 3-38 4 ANALYSIS METHODS AND RESULTS 4-1 4.1 Overburden Layer 4-1 4.2 Bedrock Layer 4-7 4.3 Recreation / River Sediment 4-11 5 SITE-WIDE DCGL

SUMMARY

5-1 6

SUMMARY

AND CONCLUSIONS 6-1 REFERENCES R-1 APPENDIX A Baseline RESRAD Summary Reports A-1 APPENDIX B River Sediment / Recreation Assessment Model B-1 ii

LIST OF FIGURES Figure Paze No.

1-1 SNEC site layout 1-2 2-1 Conceptual representation of the hydrogeology at the SNEC site 2-2 2-2 Areas of concern at the SNEC site 2-5 2-3 Radiation exposure pathways 2-9 3-1 RESRAD's water transport model 3-3 3-2 RESRAD representation of the Overburden Layer 3-5 3-3 RESRAD representation of the Bedrock Layer 3-22 iii

LIST OF TABLES Table Paze No.

1-1 Radionuclides observed in site samples 1-5 3-1 Site-Wide Overburden Exposure Scenario Input Parameters 3-7 3-2 Site-Wide Bedrock Exposure Scenario Input Parameters 3-23 3-3 Recreation / Sediment Scenario Input Parameters 3-39 4-1 Input Parameter Distributions 4-2 4-2 Sensitivity of Overburden DCGLs to Input Parameter Distributions 4-5 4-3 Distributions of Overburden DCGLs From Input Parameter Distributions (pCi/g) 4-6 4-4 Sensitivity of Bedrock DCGLs to Input Parameters Distributions 4-8 4-5 Distributions of Bedrock DCGLs From Input Parameter Distributions (pCi/g) 4-9 4-6 Distributions of Bedrock 25 mrem/yr DC GLs From Input Parameter Distributions 4-10 4-7 Sensitivity of Recreation / Sediment DCGLs to Input Parameter Distributions (pCi/g) 4-12 4-8 Distributions of Recreation / Sediment DCGLs From Input Parameter Distributions (pCi/g) 4-14 5-1 Site-Wide DCGL Summary (pCi/g) 5-2 5-2 Ratio of Minimum Subsurface and Specific Soil Layer DCGLs 5-3 iv

1. INTRODUCTION The Saxton Nuclear Experimental Corporation (SNEC) operated a 23.5-megawatt thermal pressurized water research and training reactor from 1962 to 1972 at its facility near Saxton, PA. As is shown in Figure 1-1, the reactor was located adjacent to a steam-turbine electric generating station that operated from 1924 to 1972. Since the reactor shutdown, GPU Nuclear, Inc. (GPU) has assisted SNEC in removing and disposing of the reactor fuel and internal parts and in characterizing and decontaminating large portions of the site. In preparing to terminate the Nuclear Regulatory Commission (NRC) license for the site, GPU determined Derived Concentration Guideline Levels (DCGLs) for the top meter of site soil that correspond to the 25 mrem/year total radiation dose limit prescribed by NRC for site cleanup and the 4 mrern/year dose limit for drinking water. GPU contracted with URS Corporation (URS) to develop and apply a conceptual model and methodology to determine DCGLs for the sub-surface zone below the top meter of soil at the site and for the top 0.3 m of sediments in a region of the Juniata River near the water discharge tunnel.

1.1 CONTAMINANT HISTORY Radioactive materials are considered to have been on the SNEC Site from the time the site was licensed in 1962 by NRC to possess such materials and fuel the reactor. The operational history of the site indicates that the area (approximately 60 m x 75 m) around the reactor Containment Vessel (CV) included a Control and Auxiliary Building, a Radioactive Waste Disposal Facility, an underground pipe tunnel, a drum storage bunker, and a refueling water storage tank (GPU, 2000a,b). These facilities were decontaminated in 1987 - 1989 and all but 1-1

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the CV were demolished in 1992 after acceptance of a final rele ase survey by NRC (NRC, 1992).

The soils removed around the CV and structures were replaced with clean backfill soil. Although areas there is no evidence of leakage from the CV it self, the contamination removed from the buried surrounding the outside of the CV suggests the occurrence of surface spills and leaks from piping and tunnels.

The Steam Plant features underground concrete intake and discharge tunnels to cycle the reactor cooling water from the nearby Raystown Branch of the Juniata River (River). Since steam was steam contained low levels of radioactivity, farther contamination occurred when the low levels of utilized in the generating station. When reactor steam was utilized in the station, that radioactivity were cycled through the plant discharge tunnel. There is also a possibility that was radioactive contamination occurred in the intake tunnel from warm discharge water Although recycled through the intake tunnel to avoid ice buildups during cold winter periods.

regulations radioactivity levels in the discharge tunnel were low enough to satisfy the radiation tunnel then in effect, some radioactivity tended to accumulate in some Steam Plant structures, sediments, and surrounding soils near concrete cracks and joint leaks.

A Spray Pond was operated approximately 260 m southwest of the CV to cool water of from the steam plant during summer months before release to the River. The pond consisted arrays of pipes and spray nozzles covering a 40 m x 90 m area of surface soil. The radioactivity in the heated water could have been released and accumulated in the soils in the spray pond the vicinity. Some building rubble from demolition of the Steam Plant also was disposed in former Spray Pond area.

The River water rapidly dilutes any traces of radioactivity released from the Steam Plant be discharge tunnel, the spray pond effluent, and any ground-water effluents. However, it may 4

possible for low levels of radioactivity to accumulate in river sediments. The River flows 3 to 1-3

the miles north where it empties into Raystown lake, which was formed in 1973 by damming River. The River is used extensively for recreation and fishing.

the The primary radionuclides identified in analyses of steam plant sediments and soils in CV vicinity are H-3, Sr-90, Co-60, Cs-137, and Am-241. Additional radionuclides have also in contaminated been observed in one or more site samples or have been hypothesized to occur for estimating river materials, as listed in Table 1-1. All of these radionuclides will be analyzed sediment and site-subsurface DCGLs.

1.2 OBJECTIVE AND SCOPE This draft report presents the DCGLs developed by URS for the SNEC Site materials Site. Included deeper than one meter and the near-surface River sediments adjacent to the SNEC Site hydrology in this report is a summary of the input parameters chosen to represent the SNEC and current and meteorology. URS developed these analysis inputs from reviews of historical their hydrologic technical reports fumished by GPU and in consultation with GPU personnel and and 4 consultant. The DCGLs are designed to satisfy the 25 mrem/year total dose limit receive the mremlyear drinking water dose limit for members of the general public that could and their maximum radiation exposures from the SNEC Site and adjacent section of the River environments. Additionally, the use of a single set of radionuclide DCGLs for all Site decontamination efforts is explored.

1-4

Table 1-1 Radionuclides observed in site samples.

Sr-90 Eu-152 Pu-238 Cm-243 H-3 Nb-94 Eu-154 Pu-239 Cm-24 4 C-14 Fe-55 Tc-99 Eu-155 Pu-240 Ni-59 Sb-125 U-234 Pu-241 Co-60 Cs-134 U-235 Pu-242 Ni-63 Cs-137 U-238 Am-241 1-5

2. CONCEPTUAL MODEL The conceptual models of the Site and River are based upon available site characteristics.

These characteristics have been observed through hydrologic well logging activities, and in-situ and laboratory analyses of site soils and river sediments. These characteristics are used to identify four representative areas of concern. Conceptual models for these four areas are summarized below and documented in further detail by URS (URS, 2001).

2.1 SITE HYDROGEOLOGY distinct Well logs show the near-surface hydrogeology to be a consistent pattern of three in Figure 2-1).

layers of materials, (A) Fill, (B) Overburden, and (C) Bedrock (illustrated GPU identify the Previous geotechnical and hydrologic investigations provided to URS by characteristics of these materials (H&A, 2001).

0.46 to The Fill layer near the CV, Steam Plant, and Spray Ponds has been observed to be with a range 1.22 meters thick. It is represented for modeling purposes to be about 1 meter thick of well-graded from about 0.4 to 2 meters over the larger site ar ea. The Fill generally consists also contains a silty and clayey fine to coarse sand with fine to medium gravel. In some areas, it areas near well-graded mixture of ash and cinders from the fo rmer Steam Plant. In remediated The Fill the CV and Steam Plant, clean backfill from an off-site source comprises the top meter.

of is estimated to have a total porosity of 0.46 (range from 0.35 to 0.56), an effective porosity and a 0.41 (range from 0.28 to 0.54), a field capacity of 0.136 (range from 0.079 to 0.192),

levels hydraulic conductivity of 32.3 meters/year. Although generally unsaturated, higher water during significant rainfall events cause periods of transient saturation. Because of the relative 2-1

HYDROGEOLOGIC GEOLOGIC RESRAD DII CONTAMINATED I

,,. Unsaturated (nna7 'a S(Transient:Saturationl) UNSATURATED II (Transient Saturation)

<-::... .-.. :.o 1 meter below G.S.

SATURATED III (but practically impermeable) t*J 3 meters below G.S.

SATURATED III Figure 2-1. Conceptual representation of the hydrogeology at the SNEC site.

impermeability of the Overburden layer below the Fill soil, any water movement in the Fill is considered to be generally horizontal (down-gradient toward the River).

The Overburden or boulder layer thickness is observed to range from less than 1 meter to about 3 meters and is represented for modeling purposes by about 2 meters. The Overburden features rounded boulders interspersed with a dens e mixture of sand, silt and clay. The boulders consist of hard quartzite with negligible porosity. The Overburden behaves like glacial till, with a low permeability on the order of 10i 7 cm/s (0.032 m/y). Its bulk or total porosity is estimated at 0.10 to 0.15. Hydraulic gradients in the Overburden range from 0.02 to 0.03 based on gradients between the Site, tunnel, and river. The Over burden acts as a hydraulic barrier to flow between the Fill and Bedrock in undisturbed areas.

The Bedrock consists of fractured and weathered siltstone that begins at depths of 2.1 to 5.5 meters below the surface and is believed to extend to depths of more than several dozen meters. Saturated groundwater flow in the Be drock generally occurs along bedding planes and within its fractures. The total porosity of the Bedrock ranges from 0.21 to 0.41 and the effective porosity is measured at approximately 0.0275. Hydraulic gradients in the Bedrock range from 0.013 to 0.03 based on gradients between the Site, tunnel, and river. The hydraulic conductivity of the Bedrock for fracture flow is estimated to be 67.9 meters/year.

The site hydrology is dominated by westward flow toward the River in both the Fill and the Bedrock. Intermittent water in the fill layer, including infiltrating water, is bounded on the bottom by the low-permeability Overburden, which isolates the water from the Bedrock in undisturbed areas. The Bedrock features saturated water flow in the B/C interface and in Bedrock fractures and bedding planes. Although the Bedrock water flow probably extends throughout the deeper parts of the Bedrock, the regional gradient promotes relatively horizontal flow in the top 20 meters that drains to the River. The Be drock is intersected by the CV, which extends 2-3

Plant, which extends approximately 15 m beneath the surface, and by the basement of the Steam approximately 7.5 m beneath the surface. Utility tunnels near the CV also extend into the the Steam Plant basement to Bedrock, as do the plugged intake and drainage tunnels that connect the CV, Steam Plant, and the River. The disturbances of the Overburden layer in constructing with the Overburden that concrete tunnels cause high-permeability zones at their interfaces hydraulically connect the Fill and Bedrock.

2.2 AREAS OF CONCERN the SNEC Site that have the Four areas of concern were selected to represent the parts of to members of the public. These greatest potential to cause present or future radiation exposure the Steam Plant area, the Spray areas are illustrated in Figure 2-2. They include the CV area, to represent the site because of their Pond area, and the Juniata River. These areas we re chosen with radiation exposure potential for elevated radionuclide concentrations or their association pathways.

2.2.1 CV Area auxiliary and waste The CV Area is defined to include the area of the CV and the former original source of most man management operations. This area is of concern because it was the hydraulically connects the Fill made radioactivity at the site and because it contains backfill that facilities, layer and the Bedrock. Although the reactor core, most internal structures and auxiliary disposed, potential residual and surrounding contaminated soils have been removed and still remain.

contamination of soils and ground water that originated in this area may 2-4

Area #4 N

Ar6a #1 General Groundwater Flow Pattern URS - 107189 Figure 2-2. Areas of concern at the SNEC site.

2-5

of residual It is therefore considered the area with great est potential for elevated levels interfaces with native radioactivity. The potential hydraulic connections along CV and tunnel Bedrock, or both.

materials could allow migration of any contaminants into the Fill layer, the 2.2.2 Steam Plant Area Steam Plant and The Steam Plant Area is defined to include the existing basement of the basement to the River.

the underground intake and discharge tunnels that connect the former plant for discharging reactor This area was selected because it received reactor steam, it was a conduit it contains sediments secondary cooling water, it is hydraulically connected with the CV Area, that hydraulically and sumps with trace Cs-137 and other contaminants, and it contains channels filled with demolition connect the Fill-layer and the Bedrock. The Steam Plant basement was rubble from the former Steam Plant building. Although presently removed for surveys and and covering it.

sampling, one closure option calls for replacing th e rubble into the basement in this area or may Potential residual contamination of soils, debris, and ground water may remain occur from seepage through plugged tunnels from the CV Area.

River affect The intake and discharge tunnels that connect the Steam Plant to the generally migration of water and potential contaminants from other parts of the site. The tunnels backfill and feature a permeable zone along their exterior boundaries owing to less-compact intake tunnel (1.8 removal of clays from the Overburden cobbles during tunnel construction. The areas and the m x 2.4 m) is sufficiently large to intersect the Fill and Overburden layers in some the Fill-layer Overburden-Bedrock interface in others. The intake tunnel hydraulically connects as a permeable and Bedrock over its entire length. The discharge tunnel has similar size and acts via the path that intercepts Fill-layer water from the CV Area and diverts it to the River permeable zone along its exterior. The discharge tunnel hydraulically connects the Fill and remains in the Fill Bedrock layers along approximately half its length near the Steam Plant and 2-6

and Overburden layers in areas closer to the River. The tunnels can therefore conduct contaminants from the permeable basement of the St earn Plant into the Fill layer, the Bedrock, or both.

2.2.3 Spray Pond Area The Spray Pond area is defined to include the approximate 40 m x 90 m footprint of the former Spray Pond. It was selected because it seasonally received cooling water from the Steam Plant and it was later covered with building rubble from the Steam Plant. The original surface soils remain in the Spray Pond area beneath building rubble. However, the steel pipe connecting the Spray Pond to the Steam Plant has been excavated, surveyed, and removed. While the Spray Pond was built on the surface of the Fill soil layer an d was originally hydraulically isolated from the Bedrock by the overburden layer, recent and planned decontamination activities may create hydrologic transport channels through the Overburden allowing any contamination to seep into the saturated Bedrock layer.

2.2.4 Juniata River A 3- to 4-mile segment of the Juniata River is defined to extend from the South of the SNEC site to the beginning of Raystown Lake. This area was selected because it receives water and any associated contaminants from the discharge tunnel, the Fill layer, the Bedrock, and runoff (if any) from the SNEC site. Although a longer seg ment of the River could have been affected prior to damming the River in 1973, analyses of pot ential contamination in the segment leading to the Raystown Lake will conservatively capture the highest potential concentrations.

2-7

2.3 RADIATION EXPOSURE SCENARIOS AND TRANSPORT PATHWAYS Exposures to members of the critical population group are postulated to occur to a His hypothetical individual (the Receptor) who is subject to all potential exposure pathways.

all exposures from the first three areas of concern involve similar exposure scenarios because in three result from radionuclides buried in sub-surface soils (Overburden, and/or Bedrock) area of locations where he could conceivably build a house and reside. Exposures from the fourth that concern are treated separately because they utilize a scenario related to the radioactivity and occurs in the River sediments. In this case the scenarios involve use of the water for fishing recreation. The pathways for radiation exposure are illustrated in Figure 2-3.

2.3.1 Residential Scenario in the CV. Steam Plant and Spray Pond Areas The Receptor is considered to reside in a home in or near any of the first three areas of concern. The most conservative parameters are selected from each of the areas of concern to identify a site-wide residential scenario which results in the highest exposure. This site-wide the exposure is then used to determine nuclide-specific DCGLs for each subsurface layer. In (a) scenario, the Receptor is exposed to residual radioactivity in several ways that include excavating and spreading contaminated Overburden material during home construction and yard leveling; (b) consuming drinking water from a Be drock well; (c) consuming fruits and vegetables grown onsite with irrigation water from the transient flow within the Fill-soil layer; and (d) consuming beef and milk from cattle raised onsite using the same irrigation water. The shallow water table and the boulders in the Overburden layer discourage construction of a basement for the on-site residence. However, excavation and spreading of Fill material from beneath the top meter and into the upper Overburden layer could occur in leveling sloped areas for a home site.

2-8

Atmospheric Transport Onsite Resuspension Individual aaet& LI..)) *.. Stream<

____ __ .......................... 4 INTERFA CE .... , .,,*,,,

• ii!)S *.' .i S .

URS - 107193 Figure 2-3. Radiation exposure pathways.

2-9

The potential radiation exposure pathways associated with the on-site residential scenarios are analyzed to estimate radiation doses. Gamma radiation exposures occur in the yard and through the house floor from radionuclides mixed into surface soils from excavation (pathway a) and well cuttings (pathway b). Exposures from inhaling contaminated dust occur during site grading (pathway a) and well excavation (pathway b) as well as from garden tillage and wind resuspension of contaminated soils (pathways a, b, c, and d). Exposures from ingesting contaminated soil occur from soil entrained on vegetables (pathway c) and unwashed hands (pathways a, b, c, and d). Exposures from ingesting contaminated drinking water occur from transport in the Bedrock (pathway b). Exposures from ingesting contaminated fruits and vegetables occur via their uptake from contaminated surface soil (pathways a and b) and contaminated irrigation water (pathway c). Expos ures from ingesting contaminated beef and milk occur from cattle fed with contaminated crops and water (pathways a, b, and d).

2.3.2 Recreation Scenario for the Juniata River The Receptor spends his recreation time fishing, swimming and boating in the Juniata River. The potential radiation exposure pathways associated with these activities are similar to those identified for his home construction and food provision. Gamma radiation exposures occur while fishing, boating and swimming. Exposures from inadvertently ingesting contaminated water occur while swimming. Exposures from ing esting contaminated fish occur via their absorption of water-borne contaminants from the River and their consumption of contaminants absorbed on algae and bottom sediments.

2-10

3. CALCULATION MODELS Three main tools are used to determine the subsurface DCGLs for the Site Bedrock, Site Overburden soils, and the River sediments: (a) the RESRAD dose assessment model for sites contaminated with RESidual RADioactive materials, (b) spreadsheet calculations of contaminant flow, adsorption, and retardation (supported by the @Risk Probabilistic Risk Analysis Model),

and (c) the MicroShield external exposure and shielding model.

RESRAD 6.1 was developed and adapted from earlier versions for use with the NRC Standard Review Plan (NRC, 2000) for decommissioning and as a tool for demonstrating compliance with the license termination rule in a risk-informed manner. Version 6.1 also computes probabilistic estimates of radiation dose distributions that result from various distributions of input parameters. RESRAD is used to evaluate the sensitivity of input parameters and identify parameters whose most-probable values and distributions require site-specific measurements or detailed justification. It is also used to compute radiation dose distributions from unit concentrations of radionuclides.

Nuclide-specific DCGLs are then determined by ratios of the 25 mrern/year maximum to the peak of the mean dose versus time curve computed by RESRAD 6.1 and spreadsheet calculations. Additional DCGLs are also calculated from ratios of 4 mren/year to the peak dose calculated for the drinking water pathway. Radiation doses calculated by RESRAD are defined as the effective dose equivalent (EDE) from external gamma radiation plus the committed effective dose equivalent (CEDE) from internal radiation. Their sum is the total effective dose equivalent (TEDE).

3-1

Spreadsheet calculations supported by other calculation models are used for situations being where the RESRAD code cannot suitably represent the radiation exposure pathways and sediments are modeled. For example, radionuclide transport and retention in river waters 2001). Gamma represented by fundamental equations of flow and adsorptive retardation (URS, are computed from radiation dose assessments for the boating, fishing and swimming scenarios Probabilistic the radionuclide concentrations using the MicroShield code (Grove, 1996).

and assessment of the input parameter distributions within the spreadsheet calculations MicroShield model are performed using the @RISK Probabilistic Analysis Model (Palisade, 2000).

3.1 CALCULATIONS WITH RESRAD 6.1 main As is illustrated in Figure 3-1, RESRAD's basic transport model assumes three transport zones: contaminated, unsaturated, and saturated. RESRAD's model assumes water transporting the infiltrates into the contaminated zone and leaches radionuclides out of the waste, then horizontally contaminated groundwater vertically down through the unsaturated zone and through the saturated zone to a well.

RESRAD's representation of horizontal flow within the saturated zone assumes Darcian highly flow through a homogeneous, saturated, porous me dium. Because the SNEC Site is RESRAD data heterogeneous, including the transient Fill and Bedrock water pathways, two basic sets are used in the analysis to address these layers separately.

3-2

3-3 Precipitation I I I URS - 107196 Figure 3-1. RESRAD's water transport model.

3-3

RESRAD calculates radiation doses for a chronically exposed individual, focusing on radioactive contaminants in soil and their transport in air, water, and biological media to a single receptor. It considers nine exposure pathways: direct gamma exposure, inhalation of particulates and radon, and ingestion of plant foods, meat, milk, aquatic foods, water, and soil. Radiation doses, health risks, soil guidelines, and media concentrations are calculated for specified time intervals. The source is adjusted over time to account for radioactive decay and in-growth, leaching, erosion, and mixing.

3.1.1 Overburden Layer RESRAD assesses exposures from the Overburden layer at the Site by assuming that contamination is brought to the surface from well drill cuttings and excavation into the Overburden layer for a house foundation and yard leveling. It also considers that water in the Fill layer irrigates crops. Because RESRAD cannot directly represent transient horizontal flow, the irrigation is represented by a shallow well within the fill layer. Exposures from ingesting contaminated meat, milk, and vegetation; inhaling dust, and direct gamma radiation exposure are evaluated. The application of RESRAD for exposures from the Overburden layer is illustrated in Figure 3-2. Consistent with RESRAD terminology, the waste is assumed to be brought to the surface, spread, and mixed as a result of house construction, site grading, and well excavation will represent the waste zone. The region below the surface mixing zone, but above the water table is represented as the unsaturated zone (vertical transport region). RESRAD represents horizontal transport during the transient flow periods by defining a water table in the lower part of the Fill layer.

3-4

URS- 107197 Figure 3-2. RESRAD representation of the overburden layer at the CV, and steam plant, and spray pond areas.

3-5

The input parameters and their sources for assessment of exposures related to the Overburden layer are summarized in Table 3-1. Site-specific values are used, whenever available. When not available, RESRAD default values are used in the analysis. Initial source concentrations of 0.2 pCi/g represent surface concentrations resulting from house construction and site excavation. During these activities, it is assumed that a thin layer of contaminated Overburden material is brought to the surface and then mixed with the top 15 cm of topsoil. It is estimated that this surface tillage results in a dilution factor of 1/5. Furthermore, the lowest of all distribution coefficients measured on site material s are used to conservatively represent transient contaminant migration within the Fill layer soil.

3.1.2 Bedrock Layer The second RESRAD application evaluates ingestion of drinking water from a well drilled into the Bedrock. Potential waste residing near the base of the CV, Steam Plant, or transported downward from the Spray Pond Fill is modeled by RESRAD as being directly above the water-saturated bedrock. As is illustrated in Figure 3-3, this zone of contamination is represented within RESRAD by assigning the vertical-transport vadose zone a negligible thickness and rapid transport properties (making the contamination immediately available to the groundwater).

The input parameters and their sources for assessment of exposures related to the Bedrock layer are summarized in Table 3-2. Site -specific values are used, whenever available.

When not available, RESRAD default values are used in the analysis. As with the Overburden analysis, the lowest of all distribution coefficients measured on site materials are used to conservatively represent rapid contaminant migration within the Bedrock (minimizing dilution and retardation-related decay).

3-6

Table 3-1 Site-Wide Overburden Exposure Scenario Input Parameter PARAMETER DESCRIPTION VALUE SOURCE PARAMETERESCRIPTIO RESRAD Default Dose conversion factors for inhalation, mrem/pCi: Ac-227+D 6.7213+00 Am-241 4.44E-01 RESRAD Default Dose conversion factors for inhalation, mrerm/pCi:

Amn-243+D 4.40E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

C- 14 2.09E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Cm-243 3.07E-0I RESRAD Default Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Cm-244 2.48E-0 I Dose conversion factors for inhalation, rnremn/pCi: RESRAD Default Co-60 2.19E-04 Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Cs-134 4.63E-05 Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Cs-137+D 3.19E-05 Dose conversion factors for inhalation, mremlpCi: RESRAD Default Eu- 152 2.21E-04 Dose conversion factors for inhalation, mrem/pCi:

Eu-154 2.86E-04 RESRAD Default Dose conversion factors for inhalation, mrerm/pCi:

4.14E-05 RESRAD Default Eu-155 Dose conversion factors for inhalation, mrem/pCi:

Fe-55 2.69E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Gd-152 2.43E-01 Dose conversion factors for inhalation, mrem/pCi:

H-3 6.40E-08 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Nb-94 4.14E-04 RESRAD Default Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Ni-59 2.70E-06 Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Ni-63 6.29E-06 Dose conversion factors for inhalation, mrem/pCi:

Np-237+D 5.40E-0l RESRAD Default Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Pa-231 1.28E+00 Dose conversion factors for inhalation, mren/pCi: RESRAD Default Pb-210+D 1.38E-02 Dose conversion factors for inhalation, mrem/pCi: RESRAD Default Po-210 9.40E-03 Dose conversion factors for inhalation, mrem/pCi:

Pu-238 3.92E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pu-239 4.29E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pu-240 4.29E-0I RESRAD Default Dose conversion factors for inhalation, mnremn/pCi:

Pu-241+D 8.25E-03 RESRAD Default Dose conversion factors for inhalation, mrent/pCi:

Pu-242 4.1 IE-01 RESRAD Default Dose conversion factors for inhalation, mren/pCi:

Ra-226+D 8.60E-03 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Ra-228+D 5.08E-03 RESRAD Default Dose conversion factors for inhalation, mrerm/pCi:

Sb-125 1.22E-05 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Sr-90+D 1.31E-03 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

Tc-99 8.33E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Te-125m 7.29E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-228+D 3.45E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-229+D 2.16E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-230 3.26E-01 RESRAD Default Dose conversion factors for inhalation, mrenVpCi:

Th-232 1.64E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-233 1.35E-01 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

U-234 1.32E-01 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

U-235+D 1.23E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-236 1.25E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi: RESRAD Default U-238+D 1.18E-01 Dose conversion factors for inhalation, mrem/pCi:

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 1.48E-02 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ac-227+D 3.64E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Am-241 3.63E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Am-243+D 2.09E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: C-14 2.51E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cm-243 2.02E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cm-244 2.69E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Co-60 7.33E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cs-134 5.0DE-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cs-137+D 6.48E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-1 52 9.55E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-154 1.53E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-155 6.07E-07 RESRAD Default Dose conversion factors for ingestion, mren/pCi: Fe-55 1.611E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Gd-152 6.40E-08 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: H-3 7.14E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Nb-94 2.10E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ni-59 5.77E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ni-63 4.44E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Np-237+D 1.06E-02 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pa-231 5.37E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pb-210+D 1.90E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Po-210 3.20E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-238 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mreri/pCi: Pu-239 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-240 6.85E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-241+D 3.36E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-242 1.33E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ra-226+D 1.44E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ra-228+D 2.81E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Sb-125 1.53E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Sr-90+D 1.46E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Tc-99 3.67E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Te-125m 8.08E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-228+D 4.03E-03 RESRAD Default Dose conversion factors for ingestion, mremlpCi: Th-229+D 5.48E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-230 2.73E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-232 2.89E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-233 2.83E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-234 2.67E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-235+D 2.69E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-236 2.69E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-238+D 2.50E-03 RESRAD Default Ac-227+D , plant/soil concentration ratio, dimensionless 2.001-05 RESRAD Default Ac-227+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-05 RESRAD Default Ac-227+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Am-241 , plant/soil concentration ratio, dimensionless 5.001-05 RESRAD Default Am-241 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3-8

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Am-241 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-06 RESRAD Default Am-243+D , plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Am-243+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-05 RESRAD Default Am-243+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-06 RESRAD Default C-14 ,plant/soil concentration ratio, dimensionless 5.50E+00 RESRAD Default C-14 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3. 1OE-02 RESRAD Default C-14 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.20E-02 RESRAD Default Cm-243 , plant/soil concentration ratio, dimensionless L.OOE-03 RESRAD Default Cm-243 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-05 RESRAD Default Cm-243 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.00E-06 RESRAD Default Cm-244 , plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Cm-244 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-05 RESRAD Default Cm-244 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-06 RESRAD Default Co-60 , plant/soil concentration ratio, dimensionless 8.OOE-02 RESRAD Default Co-60 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-02 RESRAD Default Co-60 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-03 RESRAD Default Cs-134 , plant/soil concentration ratio, dimensionless 4.OOE-02 RESRAD Default Cs- 134 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.OOE-02 RESRAD Default Cs- 134 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 8.OOE-03 RESRAD Default Cs- I 37+D , plant/soil concentration ratio, dimensionless 4.OOE-02 RESRAD Default Cs-137+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.OOE-02 RESRAD Default Cs- 137+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 8.OOE-03 RESRAD Default Eu-152 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default Eu- 152 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-03 RESRAD Default Eu- 152 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.00E-05 RESRAD Default Eu-154 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default Eu- 154 , beef/livestock-intake ratio, (pCilkg)/(pCi/d) 2.OOE-03 RESRAD Default Eu- 154 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-05 RESRAD Default Eu-155 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default Eu-155 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-03 RESRAD Default Eu-155 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-05 RESRAD Default Fe-55 , plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Fe-55 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-02 RESRAD Default Fe-55 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 3.OOE-04 RESRAD Default Gd-152 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default Gd-152 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-03 RESRAD Default Gd-152 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-05 RESRAD Default H-3 , plant/soil concentration ratio, dimensionless 4.80E+00 RESRAD Default H-3 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.20E-02 RESRAD Default H-3 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-02 RESRAD Default Nb-94 , plant/soil concentration ratio, dimensionless 1.OOE-02 RESRAD Default Nb-94 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.00E-07 RESRAD Default Nb-94 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-06 RESRAD Default Ni-59 , plant/soil concentration ratio, dimensionless 5.00E-02 RESRAD Default Ni-59 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-03 RESRAD Default Ni-59 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-02 RESRAD Default Ni-63 , plant/soil concentration ratio, dimensionless 5.OOE-02 RESRAD Default 3-9

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 5.OOE-03 RESRAD Default Ni-63 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-02 RESRAD Default Ni-63 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.00E-02 RESRAD Default Np-237+D , plant/soil concentration ratio, dimensionless 1.0OE-03 RESRAD Default Np-237+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Np-237+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.001E-02 RESRAD Default Pa-231 , plant/soil concentration ratio, dimensionless 5.OOE-03 RESRAD Default Pa-231 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Pa-231 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-02 RESRAD Default Pb-210+D, plant/soil concentration ratio, dimensionless 8.OOE-04 RESRAD Default Pb-210+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.OOE-04 RESRAD Default Pb-210+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Po-210 ,plant/soil concentration ratio, dimensionless 5.00E-03 RESRAD Default Po-210 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default Po-210 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-238 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-238 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-238 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-239 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-239 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

.OOE-06 RESRAD Default Pu-239 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-240 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-240 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-240 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-241+D , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-241+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-241+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-242 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-242 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-242 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 4.OOE-02 RESRAD Default Ra-226+D, plant/soil concentration ratio, dimensionless 1.00E-03 RESRAD Default Ra-226+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

L.OOE-03 RESRAD Default Ra-226+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 4.OOE-02 RESRAD Default Ra-228+D, plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Ra-228+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-03 RESRAD Default Ra-228+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-02 RESRAD Default Sb-125 , plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Sb-125 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-04 RESRAD Default Sb-125 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 3.00E-O1 RESRAD Default Sr-90+D , plant/soil concentration ratio, dimensionless 8.00E-03 RESRAD Default Sr-90+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

Sr-90+D ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-03 RESRAD Default 5.OOE+00 RESRAD Default Tc-99 , plant/soil concentration ratio, dimensionless Tc-99 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.001E-04 RESRAD Default Tc-99 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) I.OOE-03 RESRAD Default Te-125m , plant/soil concentration ratio, dimensionless 6.OOE-01 RESRAD Default Te- 125m , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 7.OOE-03 RESRAD Default Te-t25m , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.OOE-04 RESRAD Default 3-10

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 1.OOE-03 RESRAD Default Th-228+D , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Th-228+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.O0E-06 RESRAD Default Th-228+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d)

IOOE-03 RESRAD Default Th-229+D , plant/soil concentration ratio, dimensionless LOOE-04 RESRAD Default Th-229+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Th-229+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Th-230 , plant/soil concentration ratio, dimensionless L.OOE-04 RESRAD Default Th-230 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.00E-06 RESRAD Default Th-230 , milk/livestock-intake ratio, (pCi/L)/(pCi/d)

I.OOE-03 RESRAD Default Th-232 , plant/soil concentration ratio, dimensionless LOOE-04 RESRAD Default Th-232 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Th-232 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default U-233 , plant/soil concentration ratio, dimensionless 3.40E-04 RESRAD Default U-233 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 6.OOE-04 RESRAD Default U-233 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default U-234 , plant/soil concentration ratio, dimensionless 3.40E-04 RESRAD Default U-234 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 6.OOE-04 RESRAD Default U-234 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default U-235+D , plant/soil concentration ratio, dimensionless 3.40E-04 RESRAD Default U-235+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 6.OOE-04 RESRAD Default U-235+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default U-236 , plant/soil concentration ratio, dimensionless 3.40E-04 RESRAD Default U-236 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 6.OOE-04 RESRAD Default U-236 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default U-238+D , plant/soil concentration ratio, dimensionless 3.40E-04 RESRAD Default U-238+D ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 6.OOE-04 RESRAD Default U-238+D ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.50E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ac-:227+D, fish Bioaccumulation factors, fresh water, Lkg: Ac-:227+D, RESRAD Default I.OOE+03 crustacea and mollusks 3.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am -241 ,fish Bioaccumulation factors, fresh water, 1/kg: Am -241 , RESRAD Default I.OOE+03 crustacea and mollusks 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am -243+D, fish Bioaccumulation factors, fresh water, L/kg: Am -243+D, RESRAD Default 1.OOE+03 crustacea and mollusks

,fish 5.OOE+04 RESRAD Default Bioaccumulation factors, fresh water, Lkg: C-I 4 Bioaccumulation factors, fresh water, L/kg: C-1 4, RESRAD Default 9.10E+03 crustacea and mollusks 3.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm -243 ,fish Bioaccumulation factors, fresh water, Lkg: Cm -243 RESRAD Default IOOE+03 crustacea and mollusks 3.00E+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm -244 , fish Bioaccumulation factors, fresh water, L/kg: Cm -244 RESRAD Default 1.0OE+03 crustacea and mollusks

,fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, k/kg: Co 60 Bioaccumulation factors, fresh water, L/kg: Co 60 2.OOE+02 RESRAD Default crustacea and mollusks 2.OOE+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs 134 ,fish Bioaccumulation factors, fresh water, L/kg: Cs 134 IOOE+02 RESRAD Default crustacea and mollusks 2.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs- 137+D, fish 3-11

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Bioaccumulation factors, fresh water, L/kg: Cs-137+D, 1.OOE+02 RESRAD Default crustacea and mollusks 5.OOE+O1 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-152 ,fish Eu-152 Bioaccumulation factors, fresh water, L/kg: RESRAD Default 1.OOE+03 crustacea and mollusks Eu-154 ,fish 5.OOE+O I RESRAD Default Bioaccumulation factors, fresh water, Llkg:

Eu- 154 Bioaccumulation factors, fresh water, L/kg: RESRAD Default I.OOE+03 crustacea and mollusks Eu-155 ,fish 5.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Eu-155 Bioaccumulation factors, fresh water, [/kg: 1.OOE+03 RESRAD Default crustacea and mollusks Fe-55 ,fish 2.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L[kg:

Fe-55 Bioaccumulation factors, fresh water, L/kg: 3.20E+03 RESRAD Default crustacea and mollusks Gd-152 ,fish 2.50E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Gd-152 ,

Bioaccumulation factors, fresh water, Llkg: RESRAD Default 1.OOE+03 crustacea and mollusks H-3 ,fish I.OOE+00 RESRAD Default Bioaccumulation factors, fresh water, L1kg:

H-3 , crustacea Bioaccumulation factors, fresh water, L/kg: RESRAD Default 1.00E+00 and mollusks Nb-94 , fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Nb-94 Bioaccumulation factors, fresh water, L/kg: RESRAD Default L.OOE+02 crustacea and mollusks Ni-59 , fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Ni-59 Bioaccumulation factors, fresh water, L/kg: 1.OOE+02 RESRAD Default crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L[kg: Ni-63 , fish Bioaccumulation factors, fresh water, L/kg:

Ni-63 RESRAD Default crustacea and mollusks 1.0OE+02 Np-237+D, fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Np-237+D, Bioaccumulation factors, fresh water, L/kg: RESRAD Default 4.OOE+02 crustaces and mollusks Pa-231 ,fish L.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Pa-231 Bioaccumulation factors, fresh water, L/kg: RESRAD Default

1. I OE+02 crustacea and mollusks Pb-210+D, fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Pb-210+D, 1.OOE+02 RESRAD Default crustacea and mollusks Po-210 ,fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Po-210 Bioaccumulation factors, fresh water, L[kg: RESRAD Default 2.OOE+04 crustacea and mollusks Pu-238 . fish 3.OOE+O1 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

[.kg: Pu-238 Bioaccumulation factors, fresh water, RESRAD Default crustacea and mollusks 1.OOE+02 Pu-239 , fish 3.OOE+O1 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

[/kg: Pu-239 Bioaccumulation factors, fresh water, RESRAD Default 1.OOE+02 crustacea and mollusks Pu-240 , fish 3.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Pu-240 Bioaccumulation factors, fresh water, [1kg: 1.OOE+02 RESRAD Default crustacea and mollusks Pu-241+D, fish 3.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, [1kg: Pu-241+D, RESRAD Default crustacea and mollusks L.OOE+02 Pu-242 ,fish 3.OOE+O I RESRAD Default Bioaccumulation factors, fresh water, L[kg:

Pu-242 Bioaccumulation factors, fresh water, L/kg: RESRAD Default I.OOE+02 crustacea and mollusks Ra-226+D, fish 5.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, [1kg:

Ra-226+D, 2.50E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

3-12

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE crustacea and mollusks Bioaccumulation factors, fresh water, L/kg: Ra-228+D, fish 5.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ra-228+D, crustacea and mollusks 2.50E+02 RESRAD Default Bioaccumulation factors, fresh water, LUkg: Sb-125 fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Sb-125 crustacea and mollusks 1.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Sr-90+D ,fish 6.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Sr-90+D ,

crustacea and mollusks 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Tc-99 , fish 2.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Tc-99 crustacea and mollusks 5.OOE+00 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Te-125m ,fish 4.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Te-125m crustacea and mollusks 7.50E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-228+D , fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-228+D, crustacea and mollusks 5.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-229+D, fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-229+D, crustacea and mollusks 5.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-230 , fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-230 crustacea and mollusks 5.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-232 , fish I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-232 crustacea and mollusks 5.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-233 , fish 1.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, 11kg: U-233 crustacea and mollusks 6.00E+0 1 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-234 ,fish 1.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-234 crustacea and mollusks 6.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-235+D , fish 1.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-235+D ,

crustacea and mollusks 6.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-236 ,fish 1.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, 11kg: U-236 crustacea and mollusks 6.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-238+D ,fish 1.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-238+D, crustacea and mollusks 6.00E+0 1 RESRAD Default 2

Area of contaminated zone (m ) I.OOE+04 RESRAD Default Thickness of contaminated zone (m) 1.50E-01 Assumed Length parallel to aquifer flow (m) 1.13E+02 GPU e-mail 1/11/02 Basic radiation dose limit (mrem/yr) 2.50E+01 RESRAD Default Time since placement of material (yr) 0.00E+00 RESRAD Default Initial principal radionuclide (pCi/g): Am-241 2.OOE-01 Assumed Initial principal radionuclide (pCi/g): C-14 2.00E-01 Assumed Initial principal radionuclide (pCi/g): Cm-243 2.OOE-01 Assumed Initial principal radionuclide (pCi/g): Cm-244 2.OOE-01 Assumed Initial principal radionuclide (pCi/g): Co-60 2.00E-0 I Assumed Initial principal radionuclide (pCi/g): Cs-134 2.OOE-0 I Assumed Initial principal radionuclide (pCi/g): Cs-137 2.00E-0 1 Assumed 3-13

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Assumed 2.OOE-01 Initial principal radionuclide (pCi/g): Eu-152 Assumed 2.OOE-01 Initial principal radionuclide (pCi/g): Eu-154 Assumed 2.OOE-01 Initial principal radionuclide (pCi/g): Eu-155 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Fe-55 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): H-3 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Nb-94 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Ni-59 Assumed 2.00E-0 1 Initial principal radionuclide (pCi/g): Ni-63 Assumed 2.00E-0 I Initial principal radionuclide (pCi/g): Pu-238 Assumed 2.00E-0 1 Initial principal radionuclide (pCi/g): Pu-239 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Pu-240 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Pu-241 Assumed Initial principal radionuclide (pCi/g): Pu-242 2.OOE-01 Assumed 2.O0E-01 Initial principal radionuclide (pCi/g): Sb-125 Assumed 2.OOE-01 Initial principal radionuclide (pCi/g): Sr-90 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): Tc-99 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): U-234 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): U-235 Assumed 2.00E-01 Initial principal radionuclide (pCi/g): U-238 0.00E+00 RESRAD Default Cover depth (ii) 3 not used Density of cover material (g/cm )

not used Cover depth erosion rate (m/yr) 3 1.60E+00 GPU e-mail 1/11/02 Density of contaminated zone (g/cm )

3.45E-04 GPU e-mail 1/11/02 Contaminated zone erosion rate (m/yr) 4.60E-01 GPU e-mail 1/11/02 Contaminated zone total porosity 1.36E-01 GPU e-mail 1/11/02 Contaminated zone field capacity 3.23E+01 GPU e-mail 1/11/02 Contaminated zone hydraulic conductivity (m/yr) 5.60E+00 GPU e-mail 1/11/02 Contaminated zone b parameter 4.07E+00 GPU e-mail 1/11/02 Average annual wind speed (m/sec) 3 8.00E+00 RESRAD Default Humidity in air (g/m )

5.90E-01 GPU e-mail 1/11/02 Evapotranspiration coefficient 9.36E-01 GPU e-mail 1/11/02 Precipitation (miyr) 2.00E-0 I RESRAD Default Irrigation (m/yr) overhead RESRAD Default Irrigation mode 3.50E-01 GPU e-mail 1/11/02 Runoff coefficient 2 5.00E+06 GPU e-mail 1/11/02 Watershed area for nearby stream or pond (m )

1.00E-03 RESRAD Default Accuracy for water/soil computations 3 1.60E+00 GPU e-mail 1/11/02 Density of saturated zone (g/cm )

4.60E-0I GPU e-mail 1/11/02 Saturated zone total porosity 4.60E-01 GPU e-mail 1/11/02 Saturated zone effective porosity 1.36E-01 GPU e-mail 1/11/02 Saturated zone field capacity 1.1OE+0I GPU e-mail 1/11/02 Saturated zone hydraulic conductivity (m/yr) 2.00E-03 GPU e-mail 1/11/02 Saturated zone hydraulic gradient not used GPU e-mail 1/11/02 Saturated zone b parameter Water table drop rate (m/yr) O.OOE+00 GPU e-mail 1/11/02 1.00E-05 GPU e-mail 1/I 1/02 Well pump intake depth (m below water table)

ND RESKAD Default Model: Nondispersion (ND) or Mass-Balance (MB) 3-14

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 3 2.86E+02 GPU e-mail 1/11/02 Well pumping rate (m /yr)

I RESRAD Default Number of unsaturated zone strata I.OOE-02 GPU e-mail 1/11/02 Unsat. zone 1, thickness (m) 3 1.60E+00 GPU e-mail 1/11/02 Unsat. zone 1, soil density (g/cm )

4.60E-01 GPU e-mail 1/11/02 Unsat. zone 1, total porosity 4.60E-01 GPU e-mail 1/ 11/02 Unsat. zone 1, effective porosity 1.36E-01 GPU e-mail 1/I 1/02 Unsat. zone 1, field capacity 5.60E+00 GPU e-mail 1/11/02 Unsat. zone 1, soil-specific b parameter 3.23E+01 GPU e-mail 1/11/02 Unsat. zone 1, hydraulic conductivity (m/yr) 3 1.OOE+00 GPU e-mail 1/11/02 Distribution coefficients for C-14 Contaminated zone (cm /g) 3 1.00E+00 GPU e-mail 1/11/02 Distribution coefficients for C-14 Unsaturated zone 1 (cm /g) 1.00E+00 GPU e-mail 1/11/02 Distribution coefficients for C- 14 Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for C-14 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for C-14 Solubility constant 3 1.0013+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-243 Contaminated zone (cm /g) 3 I.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-243 Unsaturated zone I (cm /g) 3 1.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-243 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for Cm-243 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Cm-243 Solubility constant 3 1.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-244 Contaminated zone (cm /g)

I.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-244 Unsaturated zone I (cm3/g) 3 1.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Cm-244 Saturated zone (cm /g) 0.00E+00 RESRAD Default Distribution coefficients for Cm-244 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cm-244 Solubility constant 3 2.00E+02 GPU e-mail 1/11/02 Distribution coefficients for Co-60 Contaminated zone (cm /g) 2.00E+02 GPU e-mail 1/11/02 Distribution coefficients for Co-60 Unsaturated zone I (cm3/g) 2.00E+02 GPU e-mail 1/11/02 Distribution coefficients for Co-60 Saturated zone (cm3/g) 0.OOE+00 RESRAD Default Distribution coefficients for Co-60 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Co-60 Solubility constant 3 2.13E+03 GPU e-mail 1/11/02 Distribution coefficients for Cs-134 Contaminated zone (cm /g) 3 2.13E+03 GPU e-mail 1/11/02 Distribution coefficients for Cs-134 Unsaturated zone 1 (cm /g) 2.13E+03 GPU e-mail 1/11/02 Distribution coefficients for Cs-134 Saturated zone (cm,/g) 0.00E+00 RESRAD Default Distribution coefficients for Cs-134 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cs-134 Solubility constant 3 2.13E+03 GPU e-mail 1/11/02 Distribution coefficients for Cs-137 Contaminated zone (cm /g) 3 2.13E+03 GPU e-mail 1/1 1/02 Distribution coefficients for Cs-137 Unsaturated zone I (cm /g) 2.13E+03 GPU e-mail 1/11/02 Distribution coefficients for Cs-137 Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for Cs- 137 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cs-137 Solubility constant 3 1.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-152 Contaminated zone (cm /g) 3 1.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-152 Unsaturated zone I (cm /g) 3 1.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-152 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for Eu-152

• Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Eu-152* Solubility constant I.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu- 154 Contaminated zone (cm3/g) 5 I.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-154 Unsaturated zone 1 (cm /g) 3 1.OOE+03 GPU e-mail 1/11/02 Distribution coefficients for Eu- 1544 Saturated zone (cM /g) 3-15

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 0.00E+00 RESRAD Default Distribution coefficients for Eu-154 Leach rate (/yr) 0.006+00 RESRAD Default Distribution coefficients for Eu-154 Solubility constant 1.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-155 Contaminated zone (cm3/g) 1.00E+03 GPU e-mail 1/11/02 Distribution coefficients for Eu-155 Unsaturated zone I (cm3/g) 1.00E+03 GPU e-mail I/11/02 Distribution coefficients for Eu-155 Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for Eu-155 Leach rate (/yr) 0.006+00 RESRAD Default Distribution coefficients for Eu-155 Solubility constant 3 1.00E+04 GPU e-mail 1/1 1/02 Distribution coefficients for Fe-55 Contaminated zone (cm /g) 3 1.00E+04 GPU e-mail 1/11/02 Distribution coefficients for Fe-55 Unsaturated zone 1 (cm /g) 1.00E+04 GPU e-mail 1/11/02 Distribution coefficients for Fe-55 Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for Fe-55 Leach rate (/yr) 0.006+00 RESRAD Default Distribution coefficients for Fe-55 Solubility constant 3 1.001+00 GPU e-mail 1/1 1/02 Distribution coefficients for H-3 Contaminated zone (cm /g) 3 1.00E+00 GPU e-mail 1/I 1/02 Distribution coefficients for H-3 Unsaturated zone I (cm /g) 1.00E+00 GPU e-mail 1/I 1/02 Distribution coefficients for H-3 Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for H-3 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for H-3 Solubility constant 3 8.006+01 GPU e-mail 1/1 1/02 Distribution coefficients for Nb-94 Contaminated zone (cm /g) 8.006+01 GPU e-mail 1/11/02 Distribution coefficients for Nb-94 Unsaturated zone I (cm3/g) 3 8.00E+01 GPU e-mail 1/1 1/02 Distribution coefficients for Nb-94 Saturated zone (cm /g) 0.00E+00 RESRAD Default Distribution coefficients for Nb-94 Leach rate (/yr)

O.OOE+00 RESRAD Default Distribution coefficients for Nb-94 Solubility constant 3 1.30E+03 GPU e-mail 1/11/02 Distribution coefficients for Ni-59 Contaminated zone (cm /g) 3 1.30E+03 GPU e-mail 1/1 1/02 Distribution coefficients for Ni-59 Unsaturated zone 1 (cm /g) 3 1.30E+03 GPU e-mail 1/11/02 Distribution coefficients for Ni-59 Saturated zone (cm /g)

O.00E+00 RESRAD Default Distribution coefficients for Ni-59 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Ni-59 Solubility constant 3 1.30E+03 GPU e-mail 1/11/02 Distribution coefficients for Ni-63 Contaminated zone (cm /g) 3 1.306+03 GPU e-mail 1/l 1/02 Distribution coefficients for Ni-63 Unsaturated zone 1 (cm /g)

(cm 3

/g) 1.30E+03 GPU e-mail 1/11/02 Distribution coefficients for Ni-63 Saturated zone 0.00E+00 RESRAD Default Distribution coefficients for Ni-63 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Ni-63 Solubility constant 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-23M8 Contaminated zone (cm3/g) 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-231I Unsaturated zone I (cm3/g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-2318 Saturated zone (cmY/g) 0.00E+00 RESRAD Default Distribution coefficients for Pu-2318 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-231 8 Solubility constant 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-23! Contaminated zone (cm /g) 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-23Y9 Unsaturated zone I (cm3/g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-231 Saturated zone (cm /g) 0.00E+00 RESRAD Default Distribution coefficients for Pu-23! Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-23! Solubility constant 3 1.60E+02 GPU e-mail 1/I 1/02 Distribution coefficients for Pu-241 Contaminated zone (cm /g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-241 Unsaturated zone 1(cm /g) 1.606+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-241D Saturated zone (cm3/g) 0.00E+00 RESRAD Default Distribution coefficients for Pu-2410 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-24' D Solubility constant 3-16

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-241 Contaminated zone (cm /g)

Unsaturated zone 1 (cm /g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-241 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-241 Saturated zone (cm /g)

Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Pu-241 0.OOE+00 RESRAD Default Distribution coefficients for Pu-241 Solubility constant Contaminated zone (cm /g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-242 Unsaturated zone I (cm /g) 3 1,60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-242 Saturated zone (cm /g) 3 1.60E+02 GPU e-mail 1/11/02 Distribution coefficients for Pu-242 Leach rate (/yr) O.OOE+00 RESRAD Default Distribution coefficients for Pu-242 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Pu-242 Contaminated zone (cm /g) 3 1.53E+02 GPU e-mail 1/11/02 Distribution coefficients for Sb-125 1.53E+02 GPU e-mail 1/11/02 Distribution coefficients for Sb-125 Unsaturated zone I (cm3/g) 3 1.53E+02 GPU e-mail 1/11/02 Distribution coefficients for Sb-125 Saturated zone (cm /g)

Leach rate (/yr) 0.001E+00 RESRAD Default Distribution coefficients for Sb-125 0.OOE+00 RESRAD Default Distribution coefficients for Sb-125 Solubility constant 3 GPU E-MAIL 1/11/02 Distribution coefficients for Tc-99 Contaminated zone (cm /g) 1.30E+00 3 GPU E-MAIL 1/11/02 Distribution coefficients for Tc-99 Unsaturated zone I (cm /g) 1.30E+00 3 GPU E-MAIL 1/11/02 Saturated zone (cm /g) 1.30E+00 Distribution coefficients for Tc-99 0.OOE+00 RESRAD Default Distribution coefficients for Tc-99 Leach rate (/yr)

Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Tc-99 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Contaminated zone (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Unsaturated zone I (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Saturated zone (cm /g) 1.60E+01 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for U-234 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for U-234 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-235 Contaminated zone (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Unsaturated zone I (cm /g) 1.60E+01 Distribution coefficients for U-235 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-235 Saturated zone (cm /g) 1.60E+01 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for U-235 Solubility constant O.OOE+00 RESRAD Default Distribution coefficients for U-235 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-238 Contaminated zone (cmn /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-238 Unsaturated zone 1 (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-238 Saturated zone (cm /g) 1.60E+0 I Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for U-238 0.00E+00 RESRAD Default Distribution coefficients for U-238 Solubility constant Distribution coefficients for daughter Ac-227 Contaminated zone 3

(cm /g) 2.00E+0 I RESRAD Default Distribution coefficients for daughter Ac-227 Unsaturated zone I 3

(cm /g) 2.00E+OI RESRAD Default 3 2.00E+0 I RESRAD Default Distribution coefficients for daughter Ac-227 Saturated zone (cm /g)

Leach rate (/yr) 0.00E1+00 RESRAD Default Distribution coefficients for daughter Ac-227 0.00E+00 RESRAD Default Distribution coefficients for daughter Ac-227 Solubility constant Distribution coefficients for daughter Am-241 Contaminated zone GPU E-MAIL 1/11/02 3 1.001E+03 (cm /g)

Distribution coefficients for daughter Am-241 Unsaturated zone I GPU E-MAIL 1/11/02 3 1.001E+03 (cm /g) 3 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-241 Saturated zone (cm /g) I.00E+03 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-241 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Am-241

.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Contaminated zone 3-17

Table 3-1 (continued)

P Al? A MEI*TE*R DFWT1CIPTION VALUE SOURCE (cmn/g) P A I? AMFTER DESCRIPTION GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Unsaturated zone 1 3

(cm /g) 1.00E+03 GPU E-MAIL 1/1 1/02 l.OOE+03 Distribution coefficients for daughter Am-243 Saturated zone (cn3/g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-243 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-243 Solubility constant Distribution coefficients for daughter Gd-152 Contaminated zone 3 - I.OOE+00 RESRAD Default (cm /g)

Distribution coefficients for daughter Gd-152 Unsaturated zone I 3 -1.O0E+00 RESRAD Default (cm /g) 3 -1.OOE+00 RESRAD Default Distribution coefficients for daughter Gd- 152 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Gd-152 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Gd-152 Solubility constant Distribution coefficients for daughter Np-237 Contaminated zone 3 -I.OOE+00 RESRAD Default (cm /g)

Distribution coefficients for daughter Np-237 Unsaturated zone 1

- I.OOE+O0 RESRAD Default (cm3/g) 3 - 1.OOE-000 RESRAD Default Distribution coefficients for daughter Np-237 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Np-237 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Np-237 Solubility constant Distribution coefficients for daughter Pa-231 Contaminated zone 3 5.OOE+01 RESRAD Default (cm /g)

Distribution coefficients for daughter Pa-231 Unsaturated zone I 3 5.003E+01 RESRAD Default (cm /g) 3 5.OOE+01 RESRAD Default Distribution coefficients for daughter Pa-231 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Pa-231 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Pa-231 Solubility constant Distribution coefficients for daughter Pb-210 Contaminated zone GPU E-MAIL 1/11/02 3 9.70E+03 (cm /g)

GPU E-MAIL 1/11/02 Distribution coefficients for daughter Pb-210 Unsaturated zone 1 3 9.70E+03 (cm /g) GPU E-MAIL 1/11/02 3

Saturated zone (cm /g) 9.70E+03 Distribution coefficients for daughter Pb-2 10 0.00E+00 RESRAD Default Distribution coefficients for daughter Pb-210 Leach rate (lyr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Pb-210 Solubility constant Distribution coefficients for daughter Po-210 Contaminated zone 3 I.OOE+01 RESRAD Default (cm /g)

Distribution coefficients for daughter Po-210 Unsaturated zone 1 3 1.00E+01 RESRAD Default (cm /g) 3 1.OOE+01 RESRAD Default Distribution coefficients for daughter Po-2 10 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Po-210 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Po-210 Solubility constant Distribution coefficients for daughter Ra-226 Contaminated zone 3 7.00E+01 RESRAD Default (cm /g)

Distribution coefficients for daughter Ra-226 Unsaturated zone 1 3 7.0E+01 RESRAD Default (cm /g) 3 7.00E+01 RESRAD Default Distribution coefficients for daughter Ra-226 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Ra-226 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Ra-226 Solubility constant Distribution coefficients for daughter Ra-228 Contaminated zone 3 7.OOE+01 RESRAD Default (cm /g)

Distribution coefficients for daughter Ra-228 Unsaturated zone I 3 7.OOE+O1 RESRAD Default (cm /g) 3 7.OOE+01 RESRAD Default Distribution coefficients for daughter Ra-228 Saturated zone (cm /g) 0.00E+00 RESRAD Default Distribution coefficients for daughter Ra-228 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Ra-228 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Te-125m Contaminated zone 3-18

Table 3-1 (continued) p AR A MEITER DESCRIPTION VALUE SOURCE (cm 3/g)

PARAAWTE DESCRIPTION Distribution coefficients for daughter Te-125m Unsaturated zone 1 RESRAD Default 3

(cm /g) 0.00E+00 0.OOE+00 RESRAD Default Distribution coefficients for daughter Te-125m Saturated zone (cn3/g) RESRAD Default 0.00E+00 Distribution coefficients for daughter Te-t 25m Leach rate (/yr) RESRAD Default 0.OOE+00 Distribution coefficients for daughter Te- 125m Solubility constant Distribution coefficients for daughter Th-228 Contaminated zone 6.OOE+04 RESRAD Default 3

(cm /g)

Distribution coefficients for daughter Th-228 Unsaturated zone 1 6.00E+04 RESRAD Default (cm3/g) 3 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-228 Saturated zone (cm /g) RESRAD Default 0.00E+00 Distribution coefficients for daughter Th-228 Leach rate (/yr) RESRAD Default 0.OOE+00 Distribution coefficients for daughter Th-228 Solubility constant Distribution coefficients for daughter Th-229 Contaminated zone 6.OOE+04 RESRAD Default (cm3/g)

Distribution coefficients for daughter Th-229 Unsaturated zone 1 6.OOE+04 RESRAD Default 5

(cm /g) 3 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-229 Saturated zone (cm /g) RESRAD Default 0.00E+00 Distribution coefficients for daughter Th-229 Leach rate (/yr) RESRAD Default 0.00E+00 Distribution coefficients for daughter Th-229 Solubility constant Distribution coefficients for daughter Th-230 Contaminated zone 6.OOE+04 RESRAD Default (cm3/g)

Distribution coefficients for daughter Th-230 Unsaturated zone 1 6.00E+04 RESRAD Default (cm3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-230 Saturated zone (cm3/g) RESRAD Default 0.00E1+00 Distribution coefficients for daughter Th-230 Leach rate (/yr) RESRAD Default 0.00E+00 Distribution coefficients for daughter Th-230 Solubility constant Distribution coefficients for daughter Th-232 Contaminated zone 6.OOE+04 RESRAD Default (cm3/g)

Distribution coefficients for daughter Th-232 Unsaturated zone I 6.00E+04 RESRAD Default (cn3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-232 Saturated zone (cm3/g) RESRAD Default 0.00E+00 Distribution coefficients for daughter Th-232 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-232 Solubility constant GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-233 Contaminated zone 1.60E+-0I (cm3/g) GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-233 Unsaturated zone I 1.60E+01 (cm3/g) GPU E-MAIL 1/11/02 3 1.60E+01 Distribution coefficients for daughter U-233 Saturated zone (cm /g) 0.00E+00 RESRAD Default Distribution coefficients for daughter U-233 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter U-233 Solubility constant Contaminated zone GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 1.60E+O1 (cm3/g) GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 Unsaturated zone I 1.60E+01 (cm3/g) GPU E-MAIL 1/11/02 3 1.60E+01 Distribution coefficients for daughter U-236 Saturated zone (cm /g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter U-236 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter U-236 Solubility constant 3 8.40E+03 RESRAD Default Inhalation rate (m /yr) 1.00E-04 RESRAD Default Mass loading for inhalation (g/m3) 3.00E+01 RESRAD Default Exposure duration 4.00E-01 RESRAD Default Shielding factor, inhalation 7.00E-01 RESRAD Default Shielding factor, external gamma 5.00E-01 RESRAD Default Fraction of time spent indoors 2.50E-01 RESRAD Default Fraction of time spent outdoors (on site) 3-19

Table 3-1 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Shape factor flag, external gamma 1.00E+00 RESRAD Default Fruits, vegetables and grain consumption (kg/yr) 1.121+02 GPU E-MAIL 1/11/02 Leafy vegetable consumption (kg/yr) 2.14E+01 GPU E-MAIL 1/11/02 Milk consumption (L/yr) 2.33E+02 GPU E-MAIL 1Il 1/02 Meat and poultry consumption (kg/yr) 6.70E+01 GPU E-MAIL 1/11/02 Fish consumption (kg/yr) not used Other seafood consumption (kg/yr) not used Soil ingestion rate (g/yr) 1.83E+01 GPU E-MAIL 1/11/02 Drinking water intake (L/yr) not used Contamination fraction of drinking water not used Contamination fraction of household water not used Contamination fraction of livestock water 1.00E+00 RESRAD Default Contamination fraction of irrigation water 1.00E+00 RESRAD Default Contamination fraction of aquatic food not used Contamination fraction of plant food 1.00E+00 GPU E-MAIL 1/11/02 Contamination fraction of meat 1.001E+00 GPU E-MAIL 1/11/02 Contamination fraction of milk 1.00E+00 GPU E-MAIL 1/11/02 Livestock fodder intake for meat (kg/day) 6.80E+01 RESRAD Default Livestock fodder intake for milk (kg/day) 5.50E+01 RESRAD Default Livestock water intake for meat (L/day) 5.00E+01 RESRAD Default Livestock water intake for milk (L/day) 1.60E+02 RESRAD Default Livestock soil intake (kg/day) 5.001-01 RESRAD Default 3

Mass loading for foliar deposition (g/m ) 1.001-04 RESRAD Default Depth of soil mixing layer (in) 1.501-01 RESRAD Default Depth of roots (m) 9.008-01 RESRAD Default Drinking water fraction from ground water not used Household water fraction from ground water not used Livestock water fraction from ground water 1.00E+00 RESRAD Default Irrigation fraction from ground water 1.00E+00 RESRAD Default 2

Wet weight crop yield for Non-Leafy (kg/m ) 7.00E-01 RESRAD Default 2

Wet weight crop yield for Leafy (kg/n ) 1.508+00 RESRAD Default 2

Wet weight crop yield for Fodder (kg/m ) 1.10E+00 RESRAD Default Growing Season for Non-Leafy (years) 1.701-01 RESRAD Default Growing Season for Leafy (years) 2.50E-01 RESRAD Default Growing Season for Fodder (years) 8.OOE-02 RESRAD Default Translocation Factor for Non-Leafy 1.00E-01 RESRAD Default Translocation Factor for Leafy 1.001+00 RESRAD Default Translocation Factor for Fodder 1.00E+00 RESRAD Default Dry Foliar Interception Fraction for Non-Leafy 2.50E-01 RESRAD Default Dry Foliar Interception Fraction for Leafy 2.501-01 RESRAD Default Dry Foliar Interception Fraction for Fodder 2.501-01 RESRAD Default Wet Foliar Interception Fraction for Non-Leafy 2.508-01 RESRAD Default Wet Foliar Interception Fraction for Leafy 2.50E-01 RESRAD Default Wet Foliar Interception Fraction for Fodder 2.50E-01 RESRAD Default Weathering Removal Constant for Vegetation 2.001+01 RESRAD Default 3

C- 12 concentration in water (g/cm ) 2.00E-05 RESRAD Default C- 12 concentration in contaminated soil (g/g) 3.00E-02 RESRAD Default 3-20

Table 3-1 (continued)

VALUE SOURCE PARAMETER DESCRIPTION 2.OOE-02 RESRAD Default Fraction of vegetation carbon from soil 9.80E-01 3.00E-01I RESRAD Default RESRAD Default Fraction of vegetation carbon from air 7.00E-07 RESRAD Default (m)

C-14 evasion layer thickness in soil 1.00E-10 RESRAD Default C-14 evasion flux rate from soil (I/sec) 8.00E-01 RESRAD Default C-12 evasion flux rate from soil (G/sec) RESRAD Default 2.00E-0I Fraction of grain in beef cattle feed 28.89E+01 RESRAD Default Fraction of grain in milk cow feed forms of 014 factor for gaseous RESRAD Default DCF correction (days): Fruits, non-leafy 1.40E+O1 Storage times of contaminated foodstuffs vegetables, and grain RESRAD Default 1.00E+00 RESRAD Default (days): Leafy vegetables Storage times of contaminated foodstuffs RESRAD Default 1.00E+00 foodstuffs (days): Milk Storage times of contaminated 2.00E+01 RESRAD Default contaminated foodstuffs (days): Meat and poultry Storage times of Storage times of contaminated foodstuffs (days): Fish 7.OOE+00 RESRAD Default Crustacea and RESRAD Default Storage times of contaminated foodstuffs (days):

mollusks 1.00E+00 RESRAD Default 1.00E+00 RESRAD Default (days): Well water Storage times of contaminated foodstuffs 4.50E+01 RESRAD Default foodstuffs (days): Surface water Storage times of contaminated 4.50E+01 RESRAD Default (days): Livestock fodder Storage times of contaminated foodstuffs 3-21

I CV and Steam Plant Contamination Present in Bedrock MOOMMMMEMMONOMEMIM Horizontal Transport Through Bedrock Interface to Drinking Water Well URS- 107198 Figure 3-3. RESRAD representation of Bedrock below the CV, and steam plant, and spray pond areas.

3-22

Table 3-2 Site-Wide Bedrock Exposure Scenario Input Parameter PARAMETER DESCRIPTION VALUE SOURCE Ac-227+D 6.72E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Am-241 4.44E-01 RESRAD Default Dose conversion factors for inhalation, mrenlpCi:

Am-243+D 4.40E-0I RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

C-14 2.09E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Cm-243 3.07E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Cm-244 2.48E-01 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

Co-60 2.19E-04 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Cs-134 4.63E-05 RESRAD Default Dose conversion factors for inhalation, mren/pCi:

Cs-137+D 3.19E-05 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Eu-152 2.2 1E-04 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Eu-154 2.86E-04 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Eu-155 4.14E-05 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Fe-55 2.69E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Gd-152 2.43E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

H-3 6.40E-08 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Nb-94 4.14E-04 RESRAD Default Dose conversion factors for inhalation, mremnpCi:

Ni-59 2.70E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Ni-63 6.29E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Np-237+D 5.40E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pa-231 1.28E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pb-210+D 1.38E-02 RESRAD Default Dose conversion factors for inhalation, mnremn/pCi:

Po-210 9.40E-03 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

Pu-238 3.92E-01 RESRAD Default Dose conversion factors for inhalation, mremn/pCi:

Pu-239 4.29E-01 RESRAD Default Dose conversion factors for inhalation, mnremn/pCi:

Pu-240 4.29E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pu-241+D 8.25E-03 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Pu-242 4.11 E-01 RESRAD Default Dose conversion factors for inhalation, mnrem/pCi:

Ra-226+D 8.60E-03 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Ra-228+D 5.08E-03 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Sb-125 1.22E-05 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Sr-90+D 1.31E-03 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Tc-99 8.33E-06 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Te-125m 7.29E-06 RESRAD Default Dose conversion factors for inhalation, mrerm'pCi:

Th-228+D 3.45E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-229+D 2.16E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-230 3.26E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

Th-232 1.64E+00 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-233 1.35E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-234 1.32E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-235+D 1.23E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-236 1.25E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

U-238+D 1.18E-01 RESRAD Default Dose conversion factors for inhalation, mrem/pCi:

3-23

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Dose conversion factors for ingestion, mrem/pCi: Ac-227+D 1.48E-02 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Am-241 3.64E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Am-243+D 3.63E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: C-14 2.09E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cm-243 2.5 1E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cm-244 2.02E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Co-60 2.69E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cs-134 7.33E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Cs-137+D 5.00E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-152 6.48E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-154 9.55E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Eu-155 1.53E-06 RESRAD Default Dose conversion factors for ingestion, mrern/pCi: Fe-55 6.07E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Gd- 152 1.611E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: H-3 6.40E-08 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Nb-94 7.14E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ni-59 2.1OE-07 RESRAD Default Dose conversion factors for ingestion, mremn/pCi: Ni-63 5.77E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Np-237+D 4.44E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pa-231 1.06E-02 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pb-210+D 5.37E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Po-210 1.90E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-238 3.20E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-239 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-240 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-241+D 6.85E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Pu-242 3.36E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ra-226+D 1.33E-03 RESRAD Default Dose conversion factors for ingestion, mren/pCi: Ra-228+D 1.44E-03 RESRAD Default Dose conversion factors for ingestion, mrern/pCi: Sb-125 2.81 E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Sr-90+D 1.53E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Tc-99 1.46E-06 RESRAD Default Dose conversion factors for ingestion, mremn/pCi: Te-125m 3.67E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-228+D 8.08E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-229+D 4.03E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-230 5.48E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Th-232 2.73E-03 RESRAD Default Dose. conversion factors for ingestion, mren/pCi: U-233 2.89E-04 RESRAD Default Dose conversion factors for ingestion, mren/pCi: U-234 2.83E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-235+D 2.67E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-236 2.69E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: U-238+D 2.69E-04 RESRAD Default Ac-227+D , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default Ac-227+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-05 RESRAD Default Ac-227+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-05 RESRAD Default Am-241 , plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Am-241 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.00E-05 RESRAD Default 3-24

Table 3-2 (continued)

VALUE SOURCE PARAMETER DESCRIPTION 2.00E-06 RESRAD Default Am-241 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.00E-03 RESRAD Default Am-243+D , plant/soil concentration ratio, dimensionless 5.OOE-05 RESRAD Default Am-243+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-06 RESR-AD Default Am-243+D , milk/livestock-intake ratio, (pCilL)/(pCi/d) RESRAD Default 5.50E+00 C-14 ,plant/soil concentration ratio, dimensionless RESRAD Default 3.10E-02 C-14 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 1.20E-02 C-14 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 1.OOE-03 Cm-243 , plant/soil concentration ratio, dimensionless RESRAD Default 2.OOE-05 Cm-243 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 2.OOE-06 Cm-243 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 1.00E-03 Cm-24 ,plant/soil concentration ratio, dimensionless 4

2.OOE-05 RESRAD Default Cm-24 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 4 2.OOE-06 RESRAD Default Cm-244 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 8.OOE-02 RESRAD Default Co-60 ,plant/soil concentration ratio, dimensionless RESRAD Default 2.OOE-02 Co-60 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 2.00E-03 Co-60 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 4.OOE-02 Cs-134 ,plant/soil concentration ratio, dimensionless RESRAD Default 3.OOE-02 Cs- 134 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 8.OOE-03 Cs-134 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 4.OOE-02 Cs-137+D , plant/soil concentration ratio, dimensionless RESRAD Default 3.OOE-02 Cs- 137+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 8.OOE-03 Cs-137+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 2.50E-03 Eu-152 , plant/soil concentration ratio, dimensionless 2.OOE-03 RESRAD Default Eu-152 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-05 RESRAD Default Eu-152 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 2.50E-03 Eu- 154 , plant/soil concentration ratio, dimensionless 2.OOE-03 RESRAD Default Eu-154 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-05 RESRAD Default Eu-154 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.50E-03 RESRAD Default Eu-155 , plant/soil concentration ratio, dimensionless 2.OOE-03 RESRAD Default Eu-155 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 2.OOE-05 Eu-155 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 1.00E-03 Fe-55 , plant/soil concentration ratio, dimensionless RESRAD Default 2.OOE-02 Fe-55 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 3.OOE-04 Fe-55 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 2.50E-03 Gd-152 , plant/soil concentration ratio, dimensionless RESRAD Default 2.OOE-03 Gd-152 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 2.OOE-05 Gd-152 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) RESRAD Default 4.80E+00 H-3 , plant/soil concentration ratio, dimensionless 1.20E-02 RESRAD Default H-3 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 1.00E-02 H-3 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.00E-02 RESRAD Default Nb-94 , plant/soil concentration ratio, dimensionless RESRAD Default 3.OOE-07 Nb-94 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) RESRAD Default 2.OOE-06 Nb-94 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.OOE-02 RESRAD Default Ni-59 , plant/soil concentration ratio, dimensionless 5.OOE-03 RESRAD Default Ni-59 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.OOE-02 RESRAD Default Ni-59 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.OOE-02 RESRAD Default Ni-63 ,plant/soil concentration ratio, dimensionless 3-25

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 5.OOE-03 RESRAD Default Ni-63 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 2.00E-02 RESRAD Default Ni-63 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 2.OOE-02 RESRAD Default Np-237+D, plant/soil concentration ratio, dimensionless 1.0OE-03 RESRAD Default Np-237+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Np-237+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-02 RESRAD Default Pa-23 I ,plant/soil concentration ratio, dimensionless 5.OOE-03 RESRAD Default Pa-231 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-06 RESRAD Default Pa-231 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.00E-02 RESRAD Default Pb-210+D, plant/soil concentration ratio, dimensionless 8.OOE-04 RESRAD Default Pb-210+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.OOE-04 RESRAD Default Pb-210+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Po-210 , plant/soil concentration ratio, dimensionless 5.OOE-03 RESRAD Default Po-210 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default Po-2 10 , milk/livestock-intake ratio, (pCi/L)/(pCi/d)

L.00E-03 RESRAD Default Pu-238 , plant/soil concentration ratio, dimensionless L.OOE-04 RESRAD Default Pu-238 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-238 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.001E-03 RESRAD Default Pu-239 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-239 beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.O0E-06 RESRAD Default Pu-239 ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-03 RESRAD Default Pu-240 , plant/soil concentration ratio, dimensionless 1.00E-04 RESRAD Default Pu-240 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.O0E-06 RESRAD Default Pu-240 , milk/livestock-intake ratio, (pCi/L)/(pCi/d)

L.OOE-03 RESRAD Default Pu-241+D, plant/soil concentration ratio, dimensionless I.00E-04 RESRAD Default Pu-24 I+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

L.00E-06 RESRAD Default Pu-241+D, milk/livestock-intake ratio, (pCifL)/(pCi/d) 1.00E-03 RESRAD Default Pu-242 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Pu-242 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-06 RESRAD Default Pu-242 , milk/livestock-intake ratio, (pCiIL)/(pCi/d) 4.00E-02 RESRAD Default Ra-226+D, plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Ra-226+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

I.OOE-03 RESRAD Default Ra-226+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 4.OOE-02 RESRAD Default Ra-228+D, plant/soil concentration ratio, dimensionless 1.OOE-03 RESRAD Default Ra-228+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-03 RESRAD Default Ra-228+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 1.OOE-02 RESRAD Default Sb-125 , plant/soil concentration ratio, dimensionless L.00E-03 RESRAD Default Sb-125 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d)

L.OOE-04 RESRAD Default Sb-125 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 3.00E-0I RESRAD Default Sr-90+D , plant/soil concentration ratio, dimensionless 8.OOE-03 RESRAD Default Sr-90+D , beef/livestock-intake ratio, (pCilkg)/(pCi/d) 2.00E-03 RESRAD Default Sr-90+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.00E+00 RESRAD Default Tc-99 , plant/soil concentration ratio, dimensionless 1.OOE-04 RESRAD Default Tc-99 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.OOE-03 RESRAD Default Tc-99 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.OOE-01 RESRAD Default Te-125m , plant/soil concentration ratio, dimensionless 7.00E-03 RESRAD Default Te- 125m , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 5.OOE-04 RESRAD Default Te-125m , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 3-26

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Th-228+D , plant/soil concentration ratio, dimensionless 1.00E-03 RESRAD Default Th-228+D, beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.002-04 RESRAD Default Th-228+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.OOE-06 RESRAD Default Th-229+D , plant/soil concentration ratio, dimensionless 1.00E-03 RESRAD Default Th-229+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.00E-04 RESRAD Default Th-229+D, milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.00E-06 RESRAD Default Th-230 , plant/soil concentration ratio, dimensionless 1.00E-03 RESRAD Default Th-230 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.00E-04 RESRAD Default Th-230 milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.00E-06 RESRAD Default Th-232 , plant/soil concentration ratio, dimensionless 1.001-03 RESRAD Default Th-232 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 1.00E-04 RESRAD Default Th-232 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 5.OOE-06 RESRAD Default U-233 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default U-233 ,beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default U-233 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.00E-04 RESRAD Default U-234 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default U-234 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default U-234 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.00E-04 RESRAD Default U-235+D , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default U-235+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default U-235+D ,milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.00E-04 RESRAD Default U-236 , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default U-236 , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default U-236 , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.00E-04 RESRAD Default U-238+D , plant/soil concentration ratio, dimensionless 2.50E-03 RESRAD Default U-238+D , beef/livestock-intake ratio, (pCi/kg)/(pCi/d) 3.40E-04 RESRAD Default U-238+D , milk/livestock-intake ratio, (pCi/L)/(pCi/d) 6.00E-04 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ac-227+D, fish 1.50E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ac-227+D, crustacea and mollusks 1.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-241 , fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-241 crustacea and mollusks 1.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-243+D, fish 3.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-243+D, crustacea and mollusks 1.001+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: C-14 , fish 5.00E+04 RESRAD Default Bioaccumulation factors, fresh water, L/kg: C-14 , crustacea and mollusks 9.10E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-243 , fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-243 , crustacea and mollusks 1.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-244 fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-244 , crustacea and mollusks 1.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Co-60 , fish 3.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Co-60 , crustacea and mollusks 2.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs-134 ,fish 2.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs-134 , crustacea and mollusks 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs-137+D, fish 2.00E+03 RESRAD Default 3-27

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Bioaccumulation factors, fresh water, L/kg: Cs-137+D, crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, Ljkg: Eu-152 ,fish 5.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-152 , crustacea and mollusks 1.OOE+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-154 ,fish 5.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-154 , crustacea and mollusks 1.00E+03 RESRAD Default Bioaccumulation factors, fresh water, LUkg: Eu-155 ,fish 5.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-155 , crustacea and mollusks 1.OOE+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Fe-55 ,fish 2.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, 1/kg: Fe-55 , crustacea and mollusks 3.20E+03 RESRAD Default Bioaccumulation factors, fresh water, Lkg: Gd-152 ,fish 2.50E+01 RESRAD Default Bioaccumulation factors, fresh water, LUkg: Gd-152 , crustacea and mollusks 1.OOE+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: H-3 , fish I.OOE+00 RESRAD Default Bioaccumulation factors, fresh water, L/kg: H-3 , crustacea and mollusks 1.OOE+00 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Nb-94 , fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, LUkg: Nb-94 , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-59 , fish L.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-59 , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-63 , fish 1.00OE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-63 , crustacea and mollusks 1.0OE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Np-237+D , fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Np-237+D , crustacea and mollusks 4.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, Lkg: Pa-231 ,fish 1.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pa-231 , crustacea and mollusks 1.1OE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pb-210+D, fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pb-2 10+D , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Po-210 ,fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Po-210 , crustacea and mollusks 2.OOE+04 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-238 ,fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-238 , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-239 , fish 3.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-239 , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-240 , fish 3.00E+01 RESRAD Default Bioaecumulation factors, fresh water, L/kg: Pu-240 , crustacea and mollusks 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-241+D, fish 3.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-241 +D , crustacea and mollusks I.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-242 , fish 3.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-242 , crustacea and mollusks 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ra-226+D, fish 5.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ra-226+D , crustacea 2.50E+02 RESRAD Default 3-28

Table 3-2 (continued)

D AD A 1U.41*'TIrD rn'?e.C1UPTITAN VALUE SOURCE D ADA "UMICEIR "EqVVIPTION VALUE and mollusks Ra-228+D, fish 5.00E+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Ra-228+D, crustacea 2.50E+02 RESRAD Default and mollusks Sb-125 ,fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Sb-125 , crustacea and Bioaccumulation factors, fresh water, L/kg: I.OOE+01 RESRAD Default mollusks Sr-90+D , fish 6.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Sr-90+D , crustacea t.OOE+02 RESRAD Default and mollusks Tc-99 ,fish 2.00E+0 1 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Tc-99 , crustacea and Bioaccumulation factors, fresh water, L/kg: RESRAD Default 5.00E+00 mollusks Te-125m ,fish 4.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, IJkg:

Bioaccumulation factors, fresh water, Lkg: Te-125m , crustacea 7.50E+01 RESRAD Default and mollusks Th-228+D , fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Th-228+D , crustacea 5.OOE+02 RESRAD Default and mollusks Th-229+D, fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Th-229+D, crustacea 5.00E+02 RESRAD Default and mollusks Th-230 ,fish 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: Th-230 , crustacea and 5.00E+02 RESRAD Default mollusks Th-232 , fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L1kg:

Bioaccumulation factors, fresh water, L/kg: Th-232 , crustacea and 5.OOE+02 RESRAD Default mollusks U-233 ,fish 1.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

U-233 , crustacea and Bioaccumulation factors, fresh water, L/kg: RESRAD Default 6.00E+01 mollusks U-234 ,fish 1.OOE+OI RESRAD Default Bioaccumulation factors, fresh water, L/kg:

U-234 , crustacea and Bioaccumulation factors, fresh water, L/kg: RESRAD Default 6.00E+0 I mollusks U-235+D , fish 1.00E+0 1 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: U-235+D , crustacea 6.00E+01 RESRAD Default and mollusks U-236 ,fish 1.001E+O1 RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, L/kg: U-236 , crustacea and 6.00E+01 RESRAD Default mollusks U-238+D , fish I.OOE+Ot RESRAD Default Bioaccumulation factors, fresh water, L/kg:

Bioaccumulation factors, fresh water, Lkg: U-238+D , crustacea 6.00E+01 RESRAD Default and mollusks 1.OOE+04 RESRAD Default Area of contaminated zone (m**2) 2.00E+00 RESRAD Default Thickness of contaminated zone (m) 1.13E+02 GPU E-MAIL 1/11/02 Length parallel to aquifer flow (m) 2.50E+01 RESRAD Default Basic radiation dose limit (mrem/yr) 0.OOE+00 RESRAD Default Time since placement of material (yr) 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Am-241 1.00E+00 Assumed Initial principal radionuclide (pCi/g): C-14 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Cm-243 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Cm-244 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Co-60 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Cs-134 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Cs-137 3-29

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Initial principal radionuclide (pCi/g): Eu-152 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Eu-154 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Eu-155 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Fe-55 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): H-3 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Nb-94 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Ni-59 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Ni-63 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Pu-238 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Pu-239 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Pu-240 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Pu-241 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Pu-242 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Sb-125 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Sr-90 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Tc-99 1.00E+00 Assumed Initial principal radionuclide (pCi/g): U-234 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): U-235 1.00E+00 Assumed Initial principal radionuclide (pCi/g): U-238 1.00E+00 Assumed Cover depth (in) 5.00E+00 GPU E-MAIL 1/11/02 Density of cover material (g/cm3) 1.60E+00 GPU E-MAIL 1/11/02 Cover depth erosion rate (m/yr) 0.000345 GPU E-MAIL 1/1 1/02 Density of contaminated zone (g/cra3) 1.60E+00 GPU E-MAIL 1/11/02 Contaminated zone erosion rate (m/yr) 3.45E-04 GPU E-MAIL 1/11/02 Contaminated zone total porosity 3.60E-01 GPU E-MAIL 1/11/02 Contaminated zone field capacity 1.36E-01 GPU E-MAIL I/ 11/02 Contaminated zone hydraulic conductivity (m/yr) 6.79E+01 GPU E-MAIL 1/11/02 Contaminated zone b parameter 5.60E+00 GPU E-MAIL 1/11/02 Average annual wind speed (m/sec) 4.07E+00 GPU E-MAIL 1/11/02 Humidity in air (g/nm) not used GPU E-MAIL 1/11/02 Evapotranspiration coefficient 5.90E-01 GPU E-MAIL 1/11/02 Precipitation (m/yr) 9.36E-01 GPU E-MAIL 1/11/02 Irrigation (m/yr) 2.OOE-0 I RESRAD Default Irrigation mode overhead RESRAD Default Runoff coefficient 3.50E-01 GPU E-MAIL 1/1 1/02 2

Watershed area for nearby stream or pond (m ) 5.00E+06 GPU E-MAIL 1/11/02 Accuracy for water/soil computations 1.001E-03 RESRAD Default 3

Density of saturated zone (g/cm ) 1.60E+00 GPU E-MAIL 1/11/02 Saturated zone total porosity 3.60E-01 GPU E-MAIL 1/11/02 Saturated zone effective porosity 2.80E-02 GPU E-MAIL 1/11/02 Saturated zone field capacity 1.36E-01 GPU E-MAIL 1/11/02 Saturated zone hydraulic conductivity (m/yr) 6.79E+01 GPU E-MAIL 1/11/02 Saturated zone hydraulic gradient 2.00E-02 RESRAD Default Saturated zone b parameter not used GPU E-MAIL 1/1 1/02 Water table drop rate (m/yr) 0.00E+00 GPU E-MAIL 1/11/02 Well pump intake depth (m below water table) 3.OOE+01 GPU E-MAIL 1/11/02 Model: Nondispersion (ND) or Mass-Balance (MB) ND RESRAD Default 3-30

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Well pumping rate (m3/yr) not used GPU E-MAIL 1/11/02 Number of unsaturated zone strata I RESRAD Default Unsat. zone 1, thickness (in) 1.0OE-02 GPU E-MAIL 1/11/02 Unsat. zone 1, soil density (g/cm 3) 1.60E+00 GPU E-MAIL 1/11/02 Unsat. zone 1,total porosity 4.60E-01 GPU E-MAIL 1/11/02 Unsat. zone 1, effective porosity 3.50E-01 GPU E-MAIL 1/11/02 Unsat. zone 1, field capacity 2.00E-01 RESRAD Default Unsat. zone 1, soil-specific b parameter 5.60E+00 GPU E-MAIL 1/11/02 Unsat. zone 1, hydraulic conductivity (m/yr) 6.79E+01 GPU E-MAIL 1/11/02 Distribution coefficients for C- 14 Contaminated zone (cm3/g) 1.00E+00 GPU E-MAIL 1/11/02 Distribution coefficients for C-14 Unsaturated zone 1 (cm 3/g) 1.001E+00 GPU E-MAIL 1/11/02 Distribution coefficients for C-14 Saturated zone (cm 3/g) 1.OOE+00 GPU E-MAIL 1/11/02 Distribution coefficients for C-14 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for C-14 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Cm-24:3 Contaminated zone (cm 3/g) 1.001E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24!3 Unsaturated zone 1 (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24!3 Saturated zone (cm3/g) 1.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24.3 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cm-2423 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Cm-24z& Contaminated zone (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24eI Unsaturated zone I (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24ýt Saturated zone (cm 3/g) 1.001E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-24zI Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cm-244I Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Co-60 Contaminated zone (cma/g) 2.OOE+02 GPU E-MAIL 1/11/02 Distribution coefficients for Co-60 Unsaturated zone I (cm 3/g) 2.OOE+02 GPU E-MAIL 1/11/02 Distribution coefficients for Co-60 Saturated zone (cn3/g) 2.00E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Co-60 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Co-60 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Cs- 134 Contaminated zone (cm 3/g) 2.13E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cs-134 Unsaturated zone I (cm 3/g) 2.133E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cs-134 Saturated zone (cm 3/g) 2.13E+03 GPU E-MAIL 1/1 1/02 Distribution coefficients for Cs-134 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cs- 134 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Cs- 137 Contaminated zone (cm3/g) 2.13E+03 GPU E-MAIL 1/1 1/02 Distribution coefficients for Cs- 137 Unsaturated zone I (cm 3/g) 2.13E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cs- 137 Saturated zone (cm 3/g) 2.13E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cs-137 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Cs- 137 Solubility constant O.OOE+00 RESRAD Default Distribution coefficients for Eu- 152 Contaminated zone (cm3/g) 1.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu- 152 Unsaturated zone 1 (cm'/g) I.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu- 152 Saturated zone (cm 3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-152 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Eu-152 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Eu-154 Contaminated zone (cm 3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-154 Unsaturated zone I (cm 3/g) l..OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu- 154 Saturated zone (cm 3/g) 1.OOE+03 GPU E-MAIL 1/11/02 3-31

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Distribution coefficients for Eu-154 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Eu-154 Solubility constant O.OOE+00 RESRAD Default 3 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-155 Contaminated zone (cm /g)

Distribution coefficients for Eu-155 Unsaturated zone I (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-155 Saturated zone (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-155 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Eu-155 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for Fe-55 Contaminated zone (cm3/g) 1.00E+04 GPU E-MAIL 1/11/02 Distribution coefficients for Fe-55 Unsaturated zone I (cm3/g) 1.00E+04 GPU E-MAIL 1/11/02 3 1.00E+04 GPU E-MAIL 1/11/02 Distribution coefficients for Fe-55 Saturated zone (cm /g)

Distribution coefficients for Fe-55 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Fe-55 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for H-3 Contaminated zone (cm3/g) 1.00E+00 GPU E-MAIL 1/11/02 3

Distribution coefficients for H-3 Unsaturated zone I (cm /g) 1.00E+00 GPU E-MAIL 1/11/02 Distribution coefficients for H-3 Saturated zone (cm3/g) 1.00E+00 GPU E-MAIL 1/11/02 Distribution coefficients for H-3 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for H-3 Solubility constant 0.00E+00 RESRAD Default 2

Distribution coefficients for Nb-94 Contaminated zone (cm /g) 8.00E+0 I GPU E-MAIL 1/ 11/02 3

Distribution coefficients for Nb-94 Unsaturated zone I (cm /g) 8.00E+0I GPU E-MAIL 1/11/02 Distribution coefficients for Nb-94 Saturated zone (cm3/g) 8.00E+0 I GPU E-MAIL 1/11/02 Distribution coefficients for Nb-94 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Nb-94 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Ni-59 Contaminated zone (cm3/g) 1.30E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Ni-59 Unsaturated zone I (cmn/g) 1.30E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Ni-59 Saturated zone (cm3/g) 1.30E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Ni-59 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Ni-59 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Ni-63 Contaminated zone (cm3/g) 1.30E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Ni-63 Unsaturated zone I (cm3/g) 1.30E+03 GPU E-MAIL 1/ 11/02 Distribution coefficients for Ni-63 Saturated zone (cm3/g) 1.30E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Ni-63 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Ni-63 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Pu-238 Contaminated zone (cm3/g) 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-238 Unsaturated zone I (cm3/g) 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-238 Saturated zone (cm3/g) 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-238 Leach rate (/yr) O.OOE+00 RESRAD Default Distribution coefficients for Pu-238 Solubility constant 0.OOE+00 RESRAD Default 3

Distribution coefficients for Pu-239 Contaminated zone (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 3

Distribution coefficients for Pu-239 Unsaturated zone I (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 3

Distribution coefficients for Pu-239 Saturated zone (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-239 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-239 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for Pu-240 Contaminated zone (cm3/g) 1.60E+02 GPU E-MAIL 1/11/02 5

Distribution coefficients for Pu-240 Unsaturated zone I (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 3

Distribution coefficients for Pu-240 Saturated zone (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-240 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Pu-240 Solubility constant 0.OOE+00 RESRAD Default 3-32

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE PARAMETER DESCRIPTION 3 Distribution coefficients for Pu-241 Contaminated zone (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-241 Unsaturated zone I (cm /g) 1.60E+02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-241 Saturated zone (cm /g) 1.60E+02 Distribution coefficients for Pu-241 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-241 Solubility constant 0.OOE+00 RESRAD Default 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-242 Contaminated zone (cm /g) 1.60E+02 3 GPU E-MAIL I/11/02 Distribution coefficients for Pu-242 Unsaturated zone 1 (cm /g) 1.60E+02 3 1.60E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-242 Saturated zone (cm /g)

Distribution coefficients for Pu-242 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Pu-242 Solubility constant 0.00E+00 RESRAD Default 3 GPU E-MAIL 1/11/02 Distribution coefficients for Sb-125 Contaminated zone (cm /g) 1.53E+02 3

Distribution coefficients for Sb-125 Unsaturated zone I (cm /g) 1.53E+02 GPU E-MAIL 1/11/02 3 1.53E+02 GPU E-MAIL 1/11/02 Distribution coefficients for Sb-125 Saturated zone (cm /g)

Distribution coefficients for Sb-125 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Sb-125 Solubility constant 0.00E+00 RESRAD Default 3 GPU E-MAIL 1/11/02 Distribution coefficients for Sr-90 Contaminated zone (cm /g) 1. 10E+0I 3 GPU E-MAIL 1/11/02 Distribution coefficients for Sr-90 Unsaturated zone I (cm /g) 1. 10E+0I 3 1.10E+01 GPU E-MAIL 1/ 11/02 Distribution coefficients for Sr-90 Saturated zone (cm /g)

Distribution coefficients for Sr-90 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for Sr-90 Solubility constant 0.00E+00 RESRAD Default 3

Distribution coefficients for Tc-99 Contaminated zone (cm /g) 1.30E+00 GPU E-MAIL 1/11/02 Distribution coefficients for Tc-99 Unsaturated zone I (cn3/g) 1.30E+00 GPU E-MAIL 1/ 11/02 3

Distribution coefficients for Tc-99 Saturated zone (cm /g) 1.30E+00 GPU E-MAIL 1/11/02 Distribution coefficients for Tc-99 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for Tc-99 Solubility constant 0.001E+00 RESRAD Default 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Contaminated zone (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Unsaturated zone I (cm /g) 1.60E+01 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-234 Saturated zone (cm /g) 1.60E+01 Distribution coefficients for U-234 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for U-234 Solubility constant 0.OOE+00 RESRAD Default 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-235 Contaminated zone (cm /g) 1.60E+01 3

Distribution coefficients for U-235 Unsaturated zone I (cm /g) 1.60E+01 GPU E-MAIL 1/11/02 3 GPU E-MAIL 1/11/02 Distribution coefficients for U-235 Saturated zone (cm /g) 1.60E+01 Distribution coefficients for U-235 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for U-235 Solubility constant 0.OE+00 RESRAD Default 3

Distribution coefficients for U-238 Contaminated zone (cm /g) 1.60E+01 GPU E-MAIL 1/11/02 3

Distribution coefficients for U-238 Unsaturated zone I (cm /g) 1.60E+01 GPU E-MAIL 1/11/02 3

Distribution coefficients for U-238 Saturated zone (cm /g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for U-238 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for U-238 Solubility constant 0.00E+00 RESRAD Default 3 RESRAD Default Distribution coefficients for daughter Ac-227 Contaminated zone (cm /g) 2.OOE+01 3

Distribution coefficients for daughter Ac-227 Unsaturated zone I (cm /g) 2.00E+01 RESRAD Default 3

Distribution coefficients for daughter Ac-227 Saturated zone (cm /g) 2.OOE+01 RESRAD Default Distribution coefficients for daughter Ac-227 Leach rate (/yr) 0.OE+00 RESRAD Default Distribution coefficients for daughter Ac-227 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-241 Contaminated zone (cn3/g) 1.00E+03 GPU E-MAIL 1/11/02 3

Distribution coefficients for daughter Am-241 Unsaturated zone I (cm /g) 1.00E+03 GPU E-MAIL 1/11/02 3-33

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Distribution coefficients for daughter Am-241 Saturated zone (cm3/g) t.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-241 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-241 Solubility constant 0.OOE+00 RESRAD Default 3

Distribution coefficients for daughter Am-243 Contaminated zone (cm /g) 1.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Unsaturated zone 1 (cm3/g) 1.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Saturated zone (cm3/g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Am-243 Solubility constant 0.00E+00 RESRAD Default 3

Distribution coefficients for daughter Gd-152 Contaminated zone (cm /g) -1.00E+00 RESRAD Default Distribution coefficients for daughter Gd-I152 Unsaturated zone 1(cm3/g) -1.001E+00 RESRAD Default Distribution coefficients for daughter Gd-152 Saturated zone (cm3/g) -1.OOE+00 RESRAD Default Distribution coefficients for daughter Gd-152 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Gd- 152 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Np-237 Contaminated zone (cm3/g) -1.OOE+00 RESRAD Default Distribution coefficients for daughter Np-237 Unsaturated zone 1 (cm3/g) -1.OOE+00 RESRAD Default 3

Distribution coefficients for daughter Np-237 Saturated zone (cm /g) -1.00E+00 RESRAD Default Distribution coefficients for daughter Np-237 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Np-237 Solubility constant 0.O0E+00 RESRAD Default 9

Distribution coefficients for daughter Pa-231 Contaminated zone (cm /g) 5.OOE+01 RESRAD Default Distribution coefficients for daughter Pa-231 Unsaturated zone I (cm3/g) 5.OOE+0I RESRAD Default Distribution coefficients for daughter Pa-231 Saturated zone (cm3/g) 5.00E+01 RESRAD Default Distribution coefficients for daughter Pa-23 I Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Pa-231 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Pb-210 Contaminated zone (cm3/g) 9.70E+03 GPU E-MAIL 1/11/02 3

Distribution coefficients for daughter Pb-210 Unsaturated zone 1 (cm /g) 9.70E+03 GPU E-MAIL 1/11/02 3

Distribution coefficients for daughter Pb-210 Saturated zone (cm /g) 9.70E+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Pb-2 10 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Pb-210 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Po-210 Contaminated zone (cm3/g) 1.00E+01 RESRAD Default Distribution coefficients for daughter Po-210 Unsaturated zone I (cm 3/g) 1.O0E+01 RESRAD Default Distribution coefficients for daughter Po-210 Saturated zone (cm 3/g) 1.OOE+01 RESRAD Default Distribution coefficients for daughter Po-2 10 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Po-210 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Ra-226 Contaminated zone (cm3/g) 7.OE+01 RESRAD Default Distribution coefficients for daughter Ra-226 Unsaturated zone 1 (cm3/g) 7.00E+0 1 RESRAD Default Distribution coefficients for daughter Ra-226 Saturated zone (cm3/g) 7.OOE+0 I RESRAD Default Distribution coefficients for daughter Ra-226 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Ra-226 Solubility constant 0.O0E+00 RESRAD Default Distribution coefficients for daughter Ra-228 Contaminated zone (cm3/g) 7.00E+01 RESRAD Default Distribution coefficients for daughter Ra-228 Unsaturated zone I (cm 3/g) 7.OOE+0 1 RESRAD Default Distribution coefficients for daughter Ra-228 Saturated zone (cm3/g) 7.00E+01 RESRAD Default Distribution coefficients for daughter Ra-228 Leach rate (/yr) O.OOE+00 RESRAD Default Distribution coefficients for daughter Ra-228 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Te- 125m Contaminated zone (cm 3/g) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Te-I25m Unsaturated zone 1 (cm /g) O.OOE+00 RESRAD Default Distribution coefficients for daughter Te- 125m Saturated zone (cm3/g) O.OOE+00 RESRAD Default Distribution coefficients for daughter Te-125m Leach rate (/yr) O.OOE+00 RESRAD Default 3-34

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Distribution coefficients for daughter Te- 125m Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter Th-228 Contaminated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-228 Unsaturated zone I (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-228 Saturated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-228 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Th-228 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-229 Contaminated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-229 Unsaturated zone 1 (cm 3/g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-229 Saturated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-229 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-229 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-230 Contaminated zone (cm 3/g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-230 Unsaturated zone I (cm`/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-230 Saturated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-230 Leach rate (/yr) 0.00E+00 RESRAD Default Distribution coefficients for daughter Th-230 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-232 Contaminated zone (cm 3/g) 6.00E+04 RESRAD Default Distribution coefficients for daughter Th-232 Unsaturated zone 1 (cm3/g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-232 Saturated zone (cm 3/g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-232 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter Th-232 Solubility constant 0.OOE+00 RESRAD Default Distribution coefficients for daughter U-233 Contaminated zone (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-233 Unsaturated zone I (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-233 Saturated zone (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-233 Leach rate (/yr) 0.OOE+00 RESRAD Default Distribution coefficients for daughter U-233 Solubility constant 0.00E+00 RESRAD Default Distribution coefficients for daughter U-236 Contaminated zone (cm3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 Unsaturated zone I (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 Saturated zone (cm3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 Leach rate (/yr) o.OOE+00 RESRAD Default Distribution coefficients for daughter U-236 Solubility constant 0.00E+00 RESRAD Default Inhalation rate (m3/yr) not used Mass loading for inhalation (g/m 3) not used Exposure duration 3.00E+01 RESRAD Default Shielding factor, inhalation not used Shielding factor, external gamma not used Fraction of time spent indoors not used Fraction of time spent outdoors (on site) not used Shape factor flag, external gamma not used Fruits, vegetables and grain consumption (kg/yr) not used Leafy vegetable consumption (kg/yr) not used Milk consumption (L/yr) not used Meat and poultry consumption (kg/yr) not used Fish consumption (kg/yr) not used Other seafood consumption (kg/yr) not used Soil ingestion rate (g/yr) not used Drinking water intake (I/yr) 479 Reg. Guide 1.109 3-35

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Contamination fraction of drinking water t RESRAD Default Contamination fraction of household water not used Contamination fraction of livestock water not used Contamination fraction of irrigation water not used Contamination fraction of aquatic food not used Contamination fraction of plant food not used Contamination fraction of meat not used Contamination fraction of milk not used Livestock fodder intake for meat (kg/day) not used Livestock fodder intake for milk (kg/day) not used Livestock water intake for meat (L/day) not used Livestock water intake for milk (L/day) not used Livestock soil intake (kg/day) not used 3

Mass loading for foliar deposition (g/m ) not used Depth of soil mixing layer (m) not used Depth of roots (m) not used Drinking water fraction from ground water n RESRAD Default Household water fraction from ground water not used Livestock water fraction from ground water not used Irrigation fraction from ground water not used 2

Wet weight crop yield for Non-Leafy (kg/m ) not used 2

Wet weight crop yield for Leafy (kg/m ) not used 2

Wet weight crop yield for Fodder (kg/m ) not used Growing Season for Non-Leafy (years) not used Growing Season for Leafy (years) not used Growing Season for Fodder (years) not used Translocation Factor for Non-Leafy not used Translocation Factor for Leafy not used Translocation Factor for Fodder not used Dry Foliar Interception Fraction for Non-Leafy not used Dry Foliar Interception Fraction for Leafy not used Dry Foliar Interception Fraction for Fodder not used Wet Foliar Interception Fraction for Non-Leafy not used Wet Foliar Interception Fraction for Leafy not used Wet Foliar Interception Fraction for Fodder not used Weathering Removal Constant for Vegetation not used 3

C- 12 concentration in water (g/cm ) 2.OOE-05 RESRAD Default C-12 concentration in contaminated soil (g/g) 3.00E-02 RESRAD Default Fraction of vegetation carbon from soil 2.OOE-02 RESRAD Default Fraction of vegetation carbon from air 9.80E-01 RESRAD Default C-14 evasion layer thickness in soil (m) 3.OOE-01 RESRAD Default C-14 evasion flux rate from soil (I/sec) 7.00E-07 RESRAD Default C-12 evasion flux rate from soil (I/sec) 1.00E-10 RESRAD Default Fraction of grain in beef cattle feed 8.00E-01 RESRAD Default Fraction of grain in milk cow feed 2.00E-01 RESRAD Default DCF correction factor for gaseous forms of C14 8.89E+01 RESRAD Default Storage times of contaminated foodstuffs (days): Fruits, non-leafy vegetables, and grain 1.40E+O1 RESRAD Default 3-36

Table 3-2 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Storage times of contaminated foodstuffs (days): Leafy vegetables 1.00E+00 RESRAD Default Storage times of contaminated foodstuffs (days): Milk 1.001E+00 RESRAD Default Storage times of contaminated foodstuffs (days): Meat and poultry 2.00E+01 RESRAD Default Storage times of contaminated foodstuffs (days): Fish 7.00E+00 RESRAD Default Storage times of contaminated foodstuffs (days): Crustacea and mollusks 7.OOE+00 RESRAD Default Storage times of contaminated foodstuffs (days): Well water 1.001E+O0 RESRAD Default Storage times of contaminated foodstuffs (days): Surface water 1.00E+00 RESRAD Default Storage times of contaminated foodstuffs (days): Livestock fodder 4.50E+01 RESRAD Default 3-37

3.2 SPREADSHEET-BASED CALCULATIONS WITH MicroShield

@Risk-supported spreadsheet calculations based on equations listed in Appendix B are used to estimate the distributions of contaminant, sediment, and river flow properties for the Recreation scenario. Distributions of radionuclide concentrations in the River are projected.

Sediment concentrations are used by MicroShield to generate external gamma radiation exposure doses from fishing, swimming, and boating in these waters. These dose distributions are combined with spreadsheet-produced fish and water ingestion dose distributions from the equations in Appendix B to determine a cumulative TEDE to the receptor.

The input parameters and their sources for assessment of exposures related to contamination in the River sediments are summarized in Table 3-3. Site-specific values are used, whenever available. When not available, RESRAD and Microshield default values are used in the analysis. The lowest of all distribution coefficients measured on site materials are used to conservatively represent contaminant migration from the sediments into the River.

3-38

Table 3-3 Recreation / Sediment Exposure Scenario Input Parameters PAR AMET FR f.............N VALUE SOURCE PARAMETE DESCRIPTION VALUE 1.48E-02 RESRAD Default Dose conversion factors for ingestion, mrem/pCi: Ac-227+D Am-241 3.64E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Am-243+D 3.63E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

C-14 2.09E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Cm-243 2.51E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Crn-244 2.02E-03 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

Co-60 2.69E-05 RESRAD Default Dose conversion factors for ingestion, rnrern/pCi:

Cs- 134 7.33E-05 RESRAD Default Dose conversion factors for ingestion, rnrerm/pCi:

Cs- 137+D 5.00E-05 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Eu-152 6.48E-06 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

Eu-154 9.55E-06 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

Eu-155 1.53E-06 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Fe-55 6.07E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Gd-152 1.616-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

H-3 6.40E-08 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Nb-94 7.14E-06 RESRAD Default Dose conversion factors for ingestion, mrern/pCi:

Ni-59 2.10E-07 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Ni-63 5.77E-07 RESRAD Default Dose conversion factors for ingestion, rnrem/pCi:

Np-237+D 4.44E-03 RESRAD Default Dose conversion factors for ingestion, rnrern/pCi:

Pa-231 1.06E-02 RESRAD Default Dose conversion factors for ingestion, mrein/pCi:

Pb-210+D 5.37E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Po-210 1.90E-03 RESRAD Default Dose conversion factors for ingestion, mrern/pCi:

Pu-238 3.20E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Pu-239 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Pu-240 3.54E-03 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Pu-241+D 6.85E-05 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

Pu-242 3.36E-03 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Ra-226+D 1.33E-03 RESRAD Default Dose conversion factors for ingestion, mnrem/pCi:

Ra-228+D 1.44E-03 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Sb- 125 2.81E-06 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Sr-90+D 1.53E-04 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Tc-99 1.46E-06 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Te-125rn 3.671-06 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Th-228+D 8.086-04 RESRAD Default Dose conversion factors for ingestion, mren/pCi:

Th-229+D 4.03E-03 RESRAD Default Dose conversion factors for ingestion, mreni/pCi:

Th-230 5.48E-04 RESRAD Default Dose conversion factors for ingestion, mrem/pCi:

Th-232 2.73E-03 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

U-233 2.89E-04 RESRAD Default Dose conversion factors for ingestion, rnremn/pCi:

U-234 2.83E-04 RESRAD Default Dose conversion factors for ingestion, inrern/pCi:

U-235+D 2.67E-04 RESRAD Default Dose conversion factors for ingestion, mnremn/pCi:

U-236 2.69E-04 RESRAD Default Dose conversion factors for ingestion, mremn/pCi:

U-238+D 2.69E-04 RESRAD Default Dose conversion factors for ingestion, mnrern/pCi:

3-39

Table 3-3 (continued)

PARAMETER DESCRIPTION VALUE SOURCE Bioaccumulation factors, fresh water, L/kg: Ac-227+D, fish 1.50E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-241 , fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Am-243+D, fish 3.00E+O0 RESRAD Default Bioaccumulation factors, fresh water, L/kg: C-4 ,fish 5.00E+04 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-243 ,fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cm-244 , fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Co-60 , fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs-134 ,fish 2.00E+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Cs-137+D, fish 2.OOE+03 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-152 ,fish 5.OOE+0 I RESRAD Default Bioaceumulation factors, fresh water, L/kg: Eu-154 ,fish 5.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Eu-155 ,fish 5.OOE+0 l RESRAD Default Bioaccumulation factors, fresh water, L/kg: Fe-55 ,fish 2.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Gd-152 ,fish 2.50E+0l RESRAD Default Bioaccumulation factors, fresh water, L/kg: H-3 ,fish 1.OOE+00 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Nb-94 , fish 3.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-59 , fish 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ni-63 , fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Np-237+D, fish 3.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pa-231 , fish 1.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pb-210+D, fish 3.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Po-210 ,fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-238 , fish 3.00E+0 1 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-239 , fish 3.OOE+0-l RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-240 , fish 3.OOE+0 I RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-24 I+D , fish 3.001E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Pu-242 , fish 3.O0E+Ol RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ra-226+D, fish 5.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Ra-228+D, fish 5.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Sb-125 , fish 1.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Sr-90+D ,fish 6.00E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Tc-99 , fish 2.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Te-125m , fish 4.00E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-228+D, fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-229+D, fish 1.OOE+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-230 , fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: Th-232 , fish 1.001E+02 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-233 ,fish 1.001E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-234 , fish 1.001E+0l RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-235+D , fish 1.001E+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-236 , fish I.OOE+01 RESRAD Default Bioaccumulation factors, fresh water, L/kg: U-238+D ,fish I.OOE+01 RESRAD Default Area of contaminated zone (m2) 2.50E+01 RESRAD Default Thickness of contaminated zone (m) 3.05E-0l GPU E-MAIL 1/11/02 Time since placement of material (yr) 0.00E+00 RESRAD Default Initial principal radionuclide (pCi/g): Am-241 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): C-14 1.00E+00 Assumed 3-40

Table 3-3 (continued)

PARAMETER DESCRIPTION VALUE SOURCE 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Cm-243 Initial principal radionuclide (pCi/g): Cm-244 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Co-60 1.00E+00 Assumed 1.001E+00 Assumed Initial principal radionuclide (pCi/g): Cs- 134 Initial principal radionuclide (pCi/g): Cs-137 I .00E+00 Assumed Initial principal radionuclide (pCi/g): Eu-152 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Eu-154 1.00E+00 Assumed 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Eu-155 Initial principal radionuclide (pCi/g): Fe-55 1.00E+00 Assumed 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): H-3 Initial principal radionuclide (pCi/g): Nb-94 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Ni-59 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Ni-63 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Pu-238 I.00E+00 Assumed Initial principal radionuclide (pCi/g): Pu-239 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Pu-240 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Pu-241 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): Pu-242 1.00E+00 Assumed 1.00E+00 Assumed Initial principal radionuclide (pCi/g): Sb-125 Initial principal radionuclide (pCi/g): Sr-90 I.OOE+00 Assumed Initial principal radionuclide (pCi/g): Tc-99 1.OOE+00 Assumed Initial principal radionuclide (pCi/g): U-234 1.00E+00 Assumed Initial principal radionuclide (pCi/g): U-235 1.00E+00 Assumed Initial principal radionuclide (pCi/g): U-238 1.00E+00 Assumed Cover depth (m) 0.00E+00 RESRAD Default Contaminated zone total porosity 4.60E-01 GPU E-MAIL 1/11/02 3 1.001E+00 GPU E-MAIL 1/11/02 Distribution coefficients for C-14 Contaminated zone (cm /g) 3 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-243 Contaminated zone (cm /g) 3 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Cm-244 Contaminated zone (cm /g) 3 GPU E-MAIL 1/11/02 Distribution coefficients for Co-60 Contaminated zone (cm /g) 2.00E+02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Cs-I34 Contaminated zone (cm /g) 2.13E+03 3 GPU E-MAIL 1/11/02 Distribution coefficients for Cs-137 Contaminated zone (cm /g) 2.13E+03 Distribution coefficients for Eu-l 52 3

Contaminated zone (cm /g) 1.00E+03 GPU E-MAIL 1/11/02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-154 Contaminated zone (cm /g) 1.00E+03 3 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for Eu-155 Contaminated zone (cm /g) 3 1.001E+04 GPU E-MAIL 1/11/02 Distribution coefficients for Fe-55 Contaminated zone (cm /g) 3 1.00E+00 GPU E-MAIL 1/11/02 Distribution coefficients for H-3 Contaminated zone (cm /g) 3 GPU E-MAIL 1/11/02 Distribution coefficients for Nb-94 Contaminated zone (cmn/g) 8.00E+01 3

Distribution coefficients for Ni-59 Contaminated zone (cm /g) 1.30E+03 GPU E-MAIL 1/11/02 3

Distribution coefficients for Ni-63 Contaminated zone (cm /g) 1.30E+03 GPU E-MAIL 1/11/02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-238 Contaminated zone (cm /g) 1.60E+02 3

Distribution coefficients for Pu-239 Contaminated zone (cm /g) 1.60E+02 GPU E-MAIL 1/11/02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-240 Contaminated zone (cm /g) 1.60E+02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-24 I Contaminated zone (cm /g) 1.60E+02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Pu-242 Contaminated zone (cm /g) 1.60E+02 3 GPU E-MAIL 1/11/02 Distribution coefficients for Sb-125 Contaminated zone (cm /g) 1.53E+02 3

Distribution coefficients for Tc-99 Contaminated zone (cm /g) 1.30E+00 GPU E-MAIL 1/11/02 3-41

Table 3-3 (continued)

PARAMETER DESCRIPTION VAIIIE, RI'II IR/-'i*.

VALUE

.... Mr1.

Distribution coefficients for U-234 Contaminated zone (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for U-235 Contaminated zone (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for U-238 Contaminated zone (cm 3/g) 1.60E+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Ac-227 Contaminated zone 3

(cm /g) 2.00E+01 RESRAD Default Distribution coefficients for daughter Am-241 Contaminated zone 3

(cm /g) I.OOE+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Am-243 Contaminated zone 3

(cm /g) 1.00E+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Gd- 152 Contaminated zone 3

(cm /g) -I .OOE+00 RESRAD Default Distribution coefficients for daughter Np-237 Contaminated zone 3

(cm /g) - 1.00E+00 RESRAD Default Distribution coefficients for daughter Pa-231 Contaminated zone 3

(cm /g) 5.001E+0-1 RESRAD Default Distribution coefficients for daughter Pb-210 Contaminated zone 3

(Cm /g) 9.70E+03 GPU E-MAIL 1/11/02 Distribution coefficients for daughter Po-210 Contaminated zone 3

(cm /g) 1.00E+01 RESRAD Default Distribution coefficients for daughter Ra-226 Contaminated zone 3

(cm /g) 7.OOE+0I RESRAD Default Distribution coefficients for daughter Ra-228 Contaminated zone 3

(cm /g) 7.001E+01 RESRAD Default Distribution coefficients for daughter Te-125m Contaminated zone 3

(cm /g) 0.00E+00 RESRAD Default Distribution coefficients for daughter Th-228 Contaminated zone 3

(cn /g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-229 Contaminated zone 3

(cm /g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-230 Contaminated zone 3

(cm /g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter Th-232 Contaminated zone (cma/g) 6.OOE+04 RESRAD Default Distribution coefficients for daughter U-233 Contaminated zone 3

(cm /g) 1.60E1+01 GPU E-MAIL 1/11/02 Distribution coefficients for daughter U-236 Contaminated zone 3

(cm /g) 1.60E+01 GPU E-MAIL 1/11/02 Fraction of time spent outdoors (on site) 6.70E+00 REG Guide 1.109 Fish consumption (kg/yr) 2.06E+01 RESRAD Default Inadvertent water intake (L/yr) 5.O0E+00 Assumed Sediment Density (g/cm 3 ) 1.44E+00 GPU E-MAIL 1/11/02 Sediment Porosity 4.60E-01 GPU E-MAIL 1/11/02 Water Depth (in) 3.05E-01 GPU E-MAIL 1/1 1/02 3-42

4. ANALYSIS METHODS AND RESULTS Radiation doses are determined for exposures to contaminants in the Overburden soils, Bedrock, and River sediments. The sensitivity of these projected doses to the various distributions and uncertainties of the input parameters are determined for the analysis and development of the DCGLs through the use of the sensitivity features of the RESRAD and

@Risk models. The Microshield and spreadsheet models are deterministic but utilize the

@Risk model to generate their dose probability distributions from repeated Microshield and spreadsheet calculations. The parameters to wh ich the analysis results are most sensitive are identified. The magnitude of uncertainty in the DCGLs is estimated, using the probabilistic features of RESRAD version 6.1 and @Risk. The mean values from the resulting distributions of nuclide-specific doses are used to estimate DCGLs for each material type.

4.1 OVERBURDEN LAYER The input parameters in Table 3-1 are employed to evaluate baseline doses for each radionuclide resulting from exposure to Overburde n materials. The RESRAD calculations of these doses are presented in Appendix A. As listed in Table 4-1, site-specific distributions (GPU, 2002) are used to identify those input parameters to which the analysis results are most sensitive.

4-1

Table 4-1 Input Parameter Distributions RANGE OF VALUES EVALUATED ASSIGNED MIN. MAX. DISTRIBUTION PARAMETERS 0.6 Triangular 0.2 Thickness of Soil Evasion Layer of C-14 in Soil (m)

(This is the maximum soil thickness layer through which C-14 can escape to the air by conversion to C02. C-14 below this depth is assumed trappedin the soil.) Uniform Thickness of Contaminated Zone I (m) 0.5 1.5 0.00009 0.0006 Loguniform Contaminated Zone Erosion Rate (m/yr) Loguniform 0.362 25400 Contaminated Zone Hydraulic Conductivity (mi/yr) Uniform 0.35 0.56 Contaminated Zone Total Porosity Uniform 3 1.28 1.92 Density of Contaminated Zone (g/cm ) Uniform 0.5 0.67 Evapotranspiration Coefficient (m/yr) Default Default Truncated Lognormal-N Humidity in Air (Default Value Used) (g/m3) Value Value 0.1 0.4 Uniform Irrigation (m/yr) (Default Value Used) Uniform 0.688 1.327 Precipitation (m/y) Uniform 0.3 0.4 Runoff Coefficient 2 2.500E+06 7.500E+06 Uniform Watershed Area for Nearby Stream or Pond (m ) Uniform 3 1.28 1.92 Density of Saturated Zone (g/cm ) Loguniform 0.005 0.05 Saturated Zone Effective Porosity 15.59 909.53 Uniform Saturated Zone Hydraulic Conductivity (m/yr) Uniform 0.013 0.03 Saturated Zone Hydraulic Gradient Uniform 0.31 0.41 Saturated Zone Total Porosity 10 50 Uniform Well Pump Intake Depth (m) 3 1.28 1.92 Uniform Density of Unsaturated Zone I (glcm ) Uniform 0.28 0.54 Effective Porosity of Unsaturated Zone I 0.362 25400 Loguniform Hydraulic Conductivity of Unsaturated Zone 1 (m/yr) Uniform 0 0.5 Thickness of Unsaturated Zone I (m) 0.35 0.56 Uniform Total porosity of Unsaturated Zone 1 0.044 Bounded Lognormal-N 1

Extemal Gamma Shielding Factor 0.15 0.95 Uniform Indoor Dust Filtration Factor 0 1 Continuous Linear Indoor Time Fraction 3 4380 13100 Triangular Inhalation Rate (m /yr) 3 0 0.0001 Continuous Linear Mass Loading for Inhalation (g/m )

0 Triangular I

Contaminated Fraction of Aquatic Food 0.5 Uniform Contaminated Fraction of Irrigation Water Uniform 0.5 Contaminated Fraction of Livestock Water 478.5 730 Uniform Drinking Water Intake (L/yr) 20.6 21 Uniform Fish Consumption (kg/yr) 112 520 Uniform Fruit, Vegetable, and Grain Consumption (kg/yr) 21.4 64 Uniform Leafy Vegetable Consumption (kg/yr) 67 110 Uniform Meat and Poultry Consumption (kg/yr) 233 310 Uniform Milk Consumption 4-2

Table 4-1 Input Parameter Distributions RANGE OF VALUES EVALUATED ASSIGNED PARAMETERS MIN. MAX. DISTRIBUTION Other Seafood Consumption (kg/yr) 0.9 5 Uniform Soil Ingestion Rate (g/yr) 18.2625 36.5 Uniform Depth of Roots (m) 0.3 4 Uniform Depth of Soil Mixing Layer (m) 0 0.6 Triangular Weathering Removal Constant of all Vegetation 5.1 84 Triangular 2 3 Uniform Wet Crop Yield for Leafy (kg/m ) 0.75 Default Default 2 Value Truncated Lognormal-N Wet Crop Yield for Non-Leafy (kg/m ) Value Wet Foliar Inception Fraction of Leafy Vegetables 0.06 0.95 Triangular DistributionCoefficientfor Carbon GPUMin. GPU Max. DistributionType 3 Uniform 1.Contaminated Zone (cm /g) 0 5 3

2. Unsaturated Zone (cm /g) 0 5 Uniform

3. Saturated Zone (cm3/g) 0 5 Uniform DistributionCoefficientfor Hydrogen GPUMin. GPUMax. Distribution Type 1.Contaminated Zone (cm3/g) 0 5 Uniform 3 5 Uniform

2. Unsaturated Zone (cm /g) 0 3

3. Saturated Zone (cm /g) 0 5 Uniform 4-3

As is given in Table 4-2, the Overburden DCGLs are dependent upon variations in a variety of parameters. DCGLs for those nuc lides which tend to concentrate in fruit and vegetation, (e.g., Eu-152, Eu-154, Fe-55, H-3, Pu-238, Pu-241, Pu-242, and the Uranium isotopes), are most sensitive to the amount of fruit, vegetation, and grain consumed by the receptor. Similarly, the Sb-125 DCGL is most sensitive to the amount of meat and poultry consumed by the receptor. Finally, the C-14, Cs-134, Cs-137, and Eu-152 DCGL are most sensitive to the thickness of the contamination layer on the ground surface.

Since ingestion of contaminated drinking water is not considered for the pore water in the Overburden, only the NRC 25 mrem/yr dose limit is used to compute DCGLs for the minimum, maximum, mean doses (reported in Table 4-3). While DCGL distribution shapes are nuclide specific, the widest distributions are estaimated for the Tritium and Nickel isotopes. Conversely, narrow distributions are computed for Americium, Cobolt, and Strontium isotopes.

The mean DCGLs range from 7 pCi/g for Sr-90 to 170,000 pCi/g for Fe-55, with 9 radionuclides at or below 50 pCi/g. DCGLs for 6 nuclides are above 1,000 pCi/g (Eu-155, Fe-55, H-3, Ni-59, Ni-63, and Pu-241). DCGLs for Fe-55 and Ni-59 are the only 2 above 10,000 pCi/g.

4-4

Table 4-2 Sensitivity of Overburden DCGLs to Input Parameter Distributions MOST SENSITIVE INPUT PARAMETERS 1st 2nd 3rd Am-241 Density of contaminated zone Wet weight crop yield of leafy Wet weight crop yield of fruit, grain and vegetables non-leafy vegetables C- 14 Thickness of contaminated zone Fruit, vegetable, and grain consumption Density of contaminated zone Cm-243 Indoor time fraction Thickness of contaminated zone External gamma shielding factor Cm-244 Indoor time fraction Thickness of contaminated zone Inhalation rate Co-60 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone Fruit, vegetable, and grain Cs-134 Thickness of contaminated zone consumption Density of contaminated zone Cs-137 Thickness of contaminated zone Meat and poultry consumption Density of contaminated zone Eu-152 Thickness of contaminated zone Density of contaminated zone Milk consumption Eu-I154 Indoor time fraction Thickness of contaminated zone Soil ingestion Eu-155 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone Fe-55 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone H-3 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone Nb-94 Saturated zone hydraulic Watershed area for nearby stream or conductivity Irrigation pond Ni-59 Saturated zone hydraulic conductivity Thickness of contaminated zone Irrigation Ni-63 Saturated zone hydraulic conductivity Thickness of contaminated zone Milk consumption Pu-238 Fruit, vegetable, and grain consumption Thickness of contaminated zone Indoor time fraction Pu-239 Indoor time fraction External gamma shielding factor Fruit, vegetable, and grain consumption Pu-240 Mass loading for inhalation Indoor time fraction Indoor dust filtration factor Pu-241 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone Pu-242 Fruit, vegetable, and grain consumption Thickness of contaminated zone Leafy vegetable consumption Sb-125 Contaminated zone hydraulic Meat and poultry consumption Thickness of contaminated zone conductivity Sr-90 Wet weight crop yield of fruit, grain and Milk consumption Thickness of contaminated zone non-leafy vegetables Tc-99 Indoor time fraction Soil ingestion Saturated zone hydraulic conductivity U-234 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone U-235 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone U-238 Fruit, vegetable, and grain consumption Indoor time fraction Thickness of contaminated zone 4-5

Table 4-3 Distributions Of Overburden DCGLs From Input Parameter Distributions (pCi/g)

NUCLIDES DCGL OF MEAN MAXIMUM MINIMUM STANDARD CONCERN DCGL DCGL DCGL DEVIATION Am-241 1.8E+01 2.5E+02 6.4E+00 2.3E+01 C- 14 8.9E+O1 3.4E+02 4.31E+01 1.9E+02 Cm-243 1.2E+02 2.3E+02 7.6E+01 4.2E+02 Cm-244 1.8E+02 4.0E+02 1.11E+02 5.3E+02 Co-60 2.IE+01 3.0E+01 1.0E+01 6.5E+01 Cs- 134 2.9E+O I 4.3E+01 1.7E+01 1.2E+02 Cs- 137 5.1E+01 7.8E+01 3.5E+01 2.6E+02 Eu-152 5.4E+O I 7.8E+01 2.4E+01 1.4E+02 Eu-154 5.OE+0-l 7.2E+01 2.2E+01 1.3E+02 Eu-155 2.1E+03 3.0E+03 9.5E+02 5.6E+03 Fe-55 1.7E+05 2.3E+05 1.3E+05 1.3E+06 H-3 8.9E+03 2.0E+04 5.2E+03 2.7E+04 Nb-94 3.8E+01 5.5E+01 1.7E+01 1.0E+02 Ni-59 1.7E+04 3.0E+04 1.2E+04 8.3E+04 Ni-63 6.3E+03 1.1E+04 4.4E+03 3.OE+04 Pu-238 1.11E+02 2.4E+02 6.8E+01 3.3E+02 Pu-239 1.0E+02 2.2E+02 6.1E+01 3.OE+02 Pu-240 1.0E+02 2.2E+02 6.11E+01 3.OE+02 Pu-241 3.4E+03 7.4E+03 2.0E+03 9.8E+03 Pu-242 1.1E+02 2.3E+02 6.4E+01 3.2E+02 Sb-125 1.5E+02 2.2E+02 7.5E+01 4.5E+02 Sr-90 7.0E+00 1.4E+I01 4.2E+00 2.3E+01 Tc-99 5.4E+01 1.3E+02 3.1E+01 1.5E+02 U-234 4.6E+02 9. 1E+02 2.8E+02 1.5E+03 U-235 2.5E+02 4.0E+02 1.6E+02 1.1E+03 4.2E+02 7.6E+02 2.7E+02 1.6E+03 U-238 4-6

4.2 BEDROCK LAYER The input parameters in Table 3-2 are employed to evaluate baseline doses for each radionuclide resulting from exposure to Bedrock materials. The RESRAD calculations of these doses are presented in Appendix A. The distributions, as listed previously in Table 4-1, are site specific distributions. When appropriate, the listed distributions are applied in analysis of both the Overburden Layer and Bedrock Layer. These di stributions are used to identify those input parameters to which the analysis results are most sensitive.

The parameters to which the radiation doses are most sensitive are listed in Table 4-4.

Sensitivity analyses show that the Bedrock DCGLs are generally most sensitive to the saturated hydraulic conductivity of the Bedrock, the Bedrock hydraulic gradient, and then the Bedrock effective porosity. DCGLs for C-14 also show sens itivity to the Bedrock distribution coefficient.

Since ingestion of contaminated drinking water is the only pathway considered for the pore water in the Bedrock, both the EPA's 4 mrem/y r drinking water limit (reported in Table 4-5) and the NRC 25 mrem/year cumulative (reported in Table 4-6) dose limits are then used to compute DCGLs for the minimum, maximum, mean doses. While DCGL distribution shapes are nuclide specific, the widest distributions are estimated for the Cm-243, Ni-63, and the Europium isotopes. Conversely, narrow distributions are computed for Plutonium, Strontium, and Uranium isotopes. Since no appreciable dose is estimated from the ingestion of Fe-55-contaminated groundwater, no corresponding DCGL distribution is given.

4-7

Table 4-4 Sensitivity of Bedrock DCGLs to Input Parameter Distributions MOST SENSITIVE INPUT PARAMETERS 1st 2nd 3rd Am-241 Saturated zone hydraulic Saturated zone2nd hydraulic Saturated zone effective porosity conductivity gradient Kd of C-14 in Contaminated Saturated zone effective porosity C-14 Saturated zone hydraulic conductivity Zone Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Cm-243 conductivity gradient Saturated zone hydraulic Saturated zone effective porosity Cm-244 Saturated zone hydraulic conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Co-60 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Cs-134 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Cs-137 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Eu-152 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Eu- 154 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Eu-155 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Fe-55 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity H-3 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Nb-94 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Ni-59 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Ni-63 conductivity gradient Pu-238 Saturated zone hydraulic Saturated zone effective Saturated zone hydraulic gradient conductivity porosity Pu-239 Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Pu-240 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Pu-241 conductivity gradient Pu-242 Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity conductivity gradient Sb-125 Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Sr-90 conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity Tc-99 conductivity gradient U-234 Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity conductivity gradient U-235 Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity conductivity gradient Saturated zone hydraulic Saturated zone hydraulic Saturated zone effective porosity U-238 conductivity gradient 4-8

Table 4-5 Distributions Of Bedrock 4 mrem/yr DCGLs From Input Parameter Distributions (pCi/g)

NUCLIDES DCGL OF MEAN MAXIMUM MINIMUM STANDARD CONCERN DCGL DCGL DCGL DEVIATION 4.5E+01 2. 1E+02 1.1E+01 6.1E+01 Am-241 3.1E+01 3.OE+02 3.4E+00 2.6E+01 C- 14 9.7E+02 4.8E+03 2.9E+02 1.5E+03 Cm-243 5.6E+02 2.3E+03 1.3E+02 6.6E+02 Cm-244 4.1E+04 2.2E+05 9.9E+03 5.OE+04 Co-60 5.6E+15 8.7E+20 3.5E+14 2.2E+15 Cs-134 9.4E+05 6.8E+06 2.OE+05 1.0E+06 Cs-137 3.9E+06 2.9E+07 8.4E+05 4.3E+06 Eu-152 9.8E+06 1.OE+08 1.8E+06 9.8E+06 Eu- 154 7.7E+08 1.8E+10 1.2E+08 6.4E+08 Eu- 155 7.6E+22

• 7.6E+22

• 7.6E+22 Fe-55 1.4E+03 1.1E+04 3.OE+02 1.4E+03 H-3 3.7E+02 1.6E+03 8.3E+01 4. 1E+02 Nb-94 2.1E+05 8.9E+05 4.7E+04 2.4E+05 Ni-59 2.5E+06 1.3E+07 6.6E+05 3.2E+06 Ni-63 3.OE+01 1.6E+00 9.1E+00 Pu-238 6.7E+OO 1.5E+00 6.5E+00 3.4E-01 1.7E+00 Pu-239 1.6E+00 6.5E+00 3.5E-01 1.8E+00 Pu-240 1.1E+03 5.OE+03 2.7E+02 1.5E+03 Pu-241 1.6E+00 6.8E+00 3.5E-01 1.7E+00 Pu-242 1.6E+01 5.1E+01 3.8E+00 2.3E+01 Sb-125 4.2E+00 1.2E+01 8.5E-01 5.4E+00 Sr-90 3.3E+01 1.5E+02 7.4E+00 3.7E+O 1 Tc-99 1.9E+00 8.2E+00 4.2E-01 2.1E+00 U-234 1.9E+00 8.7E+00 4.3E-01 2.1E+00 U-235 2.OE+00 8.6E+00 4.4E-0 1 2.2E+00 U-238

• Nuclide Specific Activity Limit 4-9

Table 4-6 Distributions Of Bedrock 25 mrem/yr DCGLs From Input Parameter Distributions (pCi/g)

NUCLIDES DCGL OF MEAN MAXIMUM MINIMUM STANDARD CONCERN DCGL DCGL DCGL DEVIATION Am-241 2.8E+02 1.3E+03 7.1E+01 3.8E+02 C-14 1.9E+02 1.9E+03 2.1E+01 1.6E+02 Cm-243 6.1 E+03 3.OE+04 1.8E+03 9. 1E+03 Cm-244 3.5E+03 1.5E+04 8.OE+02 4.1E+03 Co-60 2.5E+05 1.4E+06 6.2E+04 3. 1E+05 Cs-134 3.5E+16 5.4E+21 2.2E+15 1.3E+16 Cs-137 5.9E+06 4.2E+07 1.3E+06 6.5E+06 Eu-152 2.5E+07 1.8E+08 5.3E+06 2.7E+07 Eu-154 6.1E+07 6.3E+08 1.2E+07 6. 1E+07 Eu-155 4.8E+09 1. 1E+I 1 7.2E+08 4.OE+09 Fe-55 7.6E+22 7.6E+22

• 7.6E+22

• H-3 8.6E+03 7.OE+04 1.9E+03 8.8E+03 Nb-94 2.3E+03 1.0E+04 5.2E+02 2.6E+03 Ni-59 1.3E+06 5.6E+06 2.9E+05 1.5E+06 Ni-63 1.6E+07 8.OE+07 4.1E+06 2.OE+07 Pu-238 4.2E+01 1.9E+02 1.0E+01 5.7E+01 Pu-239 9.4E+00 4.1E+01 2.1E+00 I.OE+01 Pu-240 9.7E+00 4.1E+01 2.2E+00 1.IE+01 Pu-241 7.OE+03 3.1 E+04 1.7E+03 9.5E+03 Pu-242 9.7E+00 4.3E+01 2.2E+00 1.IE+01 Sb-125 1.0E+02 3.2E+02 2.4E+01 1.5E+02 Sr-90 2.6E+01 7.8E+01 5.3E+00 3.3E+01 Tc-99 2.1 E+02 9. 1E+02 4.6E+01 2.3E+02 U-234 1.2E+01 5.1E+01 2.6E+00 1.3E+01 U-235 1.2E+01 5.4E+O 1 '2.7E+00 1.3E+01 U-238 1.2E+01 5.4E+O I 2.8E+00 1.4E+01

• Nuclide Specific Activity Limit 4-10

Mean values from the calculated distributions of nuclide-specific doses are used to calculate DCGLs for the Bedrock layer. For those nuclides considered, the 4 mrem-yr DCGL 22 values range from 1.5 pCi/g for Pu-239 to 7.6x10 pCi/g for Fe-55 (maximum activity limit for Fe-55). Similarly, the 25 mrem-yr DCGL values range from 9.4 pCilg for Pu-239 to the same maximum activity limit for Fe-55. Bedrock DC GLs (4 mrem/yr) for 17 of the 26 nuclides are below 2,000 pCi/g, with only 6 above 150,000 pCi/g When based on the 25 mrem/yr dose limit, 11 of the 26 nuclides are below 2,000 pCi/g, with 9 above 150,000 pCi/g 4.3 RECREATION / RIVER SEDIMENT The input parameters in Table 3-3 are employed to evaluate baseline doses for each radionuclide resulting from exposure to river sediment materials. The spreadsheet calculations of these doses are presented in Appendix A. The sensitivity of these river sediment doses to the various distributions and uncertainties of the input parameters is estimated using the sensitivity features of the @Risk assessment model. The distributions, as listed in Table 4-1, include site specific and default distributions. These distributions are used to identify those input parameters to which the analysis results are most sensitive.

The parameters to which the radiation doses are most sensitive are listed in Table 4-7.

For major gamma-emitting nuclides, the computed DCGL is most sensitive to exposure time.

Similarly, for those nuclides with a tendency to co ncentrate in fish flesh, the computed DCGL is most sensitive to the amount of fish consumed by the receptor.

4-11

Table 4-7 Sensitivity of Recreation / Sediment DCGLs to Input Parameter Distributions MOST SENSITIVE INPUT PARAMETERS 1st 2nd 3rd Time Spent Swimming Fish Consumption Sediment Density Am-241 Sediment Density Sediment Hydraulic Contaminant Depth C-14 Conductivity Fish Consumption Sediment Density Cm-243 Time Spent Swimming Fish Consumption Sediment Density Sediment Hydraulic Cm-244 Conductivity Time Spent Swimming Fish Consumption Sediment Density Co-60 Time Spent Swimming Fish Consumption Sediment Density Cs- 134 Time Spent Swimming Fish Consumption Sediment Density Cs-137 Time Spent Swimming Fish Consumption Sediment Density Eu-152 Eu-154 Time Spent Swimming Fish Consumption Sediment Density Fish Consumption Sediment Density Eu-155 Time Spent Swimming Fish Consumption " Sediment Density Sediment Hydraulic Fe-55 Conductivity Sediment Density Sediment Hydraulic Contaminant Depth H-3 Conductivity Time Spent Swimming Fish Consumption Sediment Density Nb-94 Fish Consumption Sediment Density Sediment Hydraulic Ni-59 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Ni-63 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Pu-238 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Pu-239 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Pu-240 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Pu-241 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Pu-242 Conductivity Time Spent Swimming Fish Consumption Sediment Density Sb- 125 Fish Consumption Sediment Density Sediment Hydraulic Sr-90 Conductivity Fish Consumption Sediment Density Sediment Hydraulic Tc-99 Conductivity Fish Consumption Sediment Hydraulic U-234 Sediment Density Conductivity Sediment Density Fish Consumption U-235 Time Spent Swimming Fish Consumption Sediment Hydraulic U-238 Sediment Density Conductivity 4-12

The NRC 25 mrem/year cumulative (reported in Table 4-8) dose limits are used to compute DCGLs for the minimum, maximum, mean doses. Mean values from the calculated distributions of nuclide-specific doses are used to calculate DCGLs for the river sediment. For those nuclides considered, the DCGL values range from 1,800 pCi/g for Co-60 to 4.5x10 11pCi/g for Fe-55. Recreation DCGLs for only 9 of the 26 nuclides are below 100,000 pCi/g, with 9 above 10,000,000 pCi/g.

4-13

Table 4-8 Distributions Of Sediment / Recreation DCGLs From Input Parameter Distributions (pCi/g)

DCGL NUCLIDES STANDARD OF MEAN MAXIMUM MINIMUM DCGL DCGL DEVIATION CONCERN DCGL 9.3E+06 2.6E+06 1.8E+07 Am-241 5.3E+06 2.OE+05 4.5E+03 5.2E+04 5.3E+04 C-14 6.OE+04 3.8E+05 1.2E+05 2.2E+05 Cm-243 7.7E+06 8.9E+07 8.9E+07 3.4E+08 Cm-244 3.4E+03 9.OE+02 5.7E+03 1.8E+03 Co-60 2.OE+03 1.3E+04 4.OE+03 7.4E+03 Cs-134 5.8E+03 3.7E+04 1.LE+04 2.1E+04 Cs-137 2.4E+03 1.5E+04 4.7E+03 8.9E+03 Eu-152 1.9E+03 1.2E+04 3.7E+03 7.OE+03 Eu-154 3.2E+05 2.OE+06 6.4E+05 1.2E+06 Eu-155 3.8E+10 4.5E+11 4.5E+ 11 1.7E+12 Fe-55 2.5E+11 6.2E+09 7.1E+10 6.9E+10 H-3 1.9E+03 1.2E+04 3.7E+03 6.9E+03 Nb-94 2.9E+10 3.4E+1 1 3.4E+ I1 1.3E+12 Ni-59 1.1E+10 1.2E+11 1.2E+1 I 4.7E+1 1 Ni-63 7.7E+05 9.0E+06 9.1E+06 3.4E+07 Pu-238 7.OE+05 8.2E+06 8.1E+06 3.OE+07 Pu-239 7.OE+05 8.2E+06 8.2E+06 3.1E-E+07 Pu-240 3.6E+07 4.2E+08 4.3E+08 1.6E+09 Pu-241 7.4E+05 8.6E+06 8.7E+06 3.3E+07 Pu-242 8.9E+03 5.7E+04 1.8E+04 3.3E+04 Sb-125 5.6E+05 6.5E+06 6.6E+06 2.5E+07 Sr-90 9.1E+08 2.1E+07 2.4E+08 2.4E+08 Tc-99 2.6E+06 3.OE+07 2.8E+07 9.7E+07 U-234 5.OE+04 3.2E+05 9.8E+04 1.8E+05 U-235 2.7E+06 3.2E+07

3. 1E+07 1.IE+08 U-238 4-14

5. SITE-WIDE DCGL

SUMMARY

As is summarized in Chapter 4, this report contains two sets of nuclide-specific DCGLs for site subsurface materials (e.g., Overburden and Bedrock). In addition to these DCGLs calculated by URS, GPU has also estimated similar DCGLs for the top meter of Fill soil (GPU, 2000). The URS and GPU DCGLs have been calcula ted to serve as concentration limits for the respective soil layer decontamination activities. In addition to estimation of these DCGLs, GPU has requested that URS examine the conservatisms and implications of developing a single set of nuclide-specific DCGLs applicable site-wide to all soil materials (not including recreational use of River).

Table 5-1 summarizes the DCGLs for each material layer, noting the lowest (most conservative). The ratio of the lowest radionuc lide DCGL to the DCGL for each soil layer is summarized in Table 5-2. As is reflected, th e restrictive subsurface DCGLs occur from both drinking contaminated water from the Bedrock and from non-drinking water exposure to the Overburden (each at 13 nuclides of 26). As is also reflected in Table 5-2, applying the minimum DCGL for all subsurface layers results in a cl eanup criterion at least 75% lower than mandated.

5-1

Table 5-1 Site-Wide DCGL Summary (pCi/g)

OVERBURDEN RIVER LAYER SEDIMENTS near CV, near FROM BEDROCK LAYER RECREATION below CV, Steam Plant, and Spray Steam Plant, and below Spray Pond SCENARIO Pond DCGL based on DCGL based on DCGL based on 4 MINIMUM 25 mrem/yr all mrem/yr DCGL based on SITE pathway NUCLIDES 25 mrem/yr all pathway drinking-water 25 mrem/yr all SUBSURFACE standard OF standard pathway standard DCGL CONCERN standard standard 1.8E+01 1.80E+01 5.3E+06 Am-241 2.8E+02 4.5E+01 1.9E+02 3.1E+01 8.9E+01 3.10E+O1 5.3E+04 C-14 1.20E+02 9.7E+02 1.2E+02 1.2E+05 Cm-243 6.1E+03 3.5E+03 5.6E+02 1.8E+02 1.80E+02 8.9E+07 Cm-244 2.1OE+O1

4. 1E+04 2.1E+01 1.8E+03 Co-60 2.5E+05 5.6E+15 2.9E+0 1 2.90E+01 4.OE+03 Cs-134 3.5E+16 5.9E+06 9.4E+05 5.1E+01 5.10E+01 1.1 E+04 Cs-137 5.40E+O 1 2.5E+07 3.9E+06 5.4E+01 4.7E+03 Eu-152 5.OOE+01 9.8E+06 5.OE+01 3.7E+03 Eu-154 6.11E+07 7.7E+08 2. 1E+03 2.1OE+03 6.4E+05 Eu-155 4.8E+09 7.6E+22 7.6E+22 1.7E+05 1.70E+05 4.5E+1 I Fe-55 8.6E+03 1.4E+03 8.9E+03 1.40E+03 6.9E+ 10 H-3 3.7E+02 3.8E+01 3.80E+O1 3.7E+03 Nb-94 2.3E+03 2.11E+05 1.7E+04 1.70E+04 3.4E+1 1 Ni-59 1.3E+06 1.6E+07 2.5E+06 6.3E+03 6.30E+03 1.2E+1 1 Ni-63 4.2E+01 6.7E+00 1.1E+02 6.70E+00 9.1E+06 Pu-238 9.4E+00 1.5E+00 1.01E+02 1.50E+00 8.1 E+06 Pu-239 9.7E+00 1.6E+00 1.OE+02 1.60E+00 8.2E+06 Pu-240 1.1E+03 3.4E+03 1.10E+03 4.3E+08 Pu-241 7.0E+03 9.7E+00 1.6E+00 1.1E+02 1.60E+00 8.7E+06 Pu-242 1.6E+01 1.5E+02 1.60E+01 1.8E+04 Sb- 125 1.0E+02 2.6E+01 4.2E+00 7.OE+00 4.20E+00 6.6E+06 Sr-90

2. 1E+02 3.3E+01 5.4E+01 3.30E+01 2.4E+08 Tc-99 1.2E+01 1.9E1+00 4.6E+02 1.90E+00 2.8E+07 U-234 1.2E+01 1.9E+00 2.5E+02 1.90E+00 9.8E+04 U-235 1.2E+01 2.OE+00 1.4E+03 2.OOE+00 3.1E+07 U-238

• Nuclide Specific Activity Limit 5-2

Table 5-2 Ratio of Minimum Subsurface and Specific Soil Layer DCGL OVERBURDEN BEDROCK LAYER LAYER 25 mrem/yr 4 mrem/yr 25 mrem/yr Am-241 0.06 0.40 1.00 C-14 0.16 1.00 0.35 Cm-243 0.02 0.12 1.00 Cm-244 0.05 0.32 1.00 Co-60 0.00 0.00 1.00 Cs-134 0.00 0.00 1.00 Cs-137 0.00 0.00 1.00 Eu-152 0.00 0.00 1.00 Eu-154 0.00 0.00 1.00 Eu-155 0.00 0.00 1.00 Fe-55 0.00 0.00 1.00 H-3 0.16 1.00 0.16 Nb-94 0.02 0.10 1.00 Ni-59 0.01 0.08 1.00 Ni-63 0.00 0.00 1.00 Pu-238 0.16 1.00 0.06 Pu-239 0.16 1.00 0.02 Pu-240 0.16 1.00 0.02 Pu-241 0.16 1.00 0.32 Pu-242 0.16 1.00 0.01 Sb-125 0.16 1.00 0.11 Sr-90 0.16 1.00 0.60 Tc-99 0.16 1.00 0.61 U-234 0.16 1.00 0.00 U-235 0.16 1.00 0.01 U-238 0.17 1.00 0.00 5-3

6.

SUMMARY

AND CONCLUSIONS In preparing to terminate the NRC license fo r the site, GPU determined DCGLs for the top meter of the SNEC site soil that correspond to the 25 mrem/year radiation dose limit prescribed by NRC for site cleanup. This report documents a conceptual model and methodology developed by URS to determine DCGLs for the sub-surface zone below the top meter of soil.

Three areas of concern are considered for estimating radiation doses for a resident /

farmer scenario: the CV, the Steam Plant, and the Spray Pond Areas. A fourth area, the River Sediments, is also considered for estimating radiation doses for a recreation scenario. DCGLs are calculated from the radiation doses.

The site hydrology is dominated by a shallow Fill layer and a deeper Bedrock region, separated by a relatively impermeable Overburden layer. The Fill and Bedrock both drain westward toward the River. Disturbed areas (or planned disturbed areas) of the Overburden at the perimeters of the CV, Steam Plant, tunnels, and Spray Ponds hydraulically connect the Fill and Bedrock and enhance drainage from the Site.

Radiation exposure pathways associated with the resident / farmer scenario are analyzed to estimate radiation doses. Gamma radiation exposures occur in the yard and through the house floor from radionuclides mixed into surface soils from excavation and well cuttings. Exposures from inhaling contaminated dust occur during site grading, well excavation, garden tillage, and wind resuspension. Exposures from ingesting contaminated soil occur from soil entrained on vegetables and unwashed hands. Exposures from ingesting contaminated drinking water occur from transport in the Bedrock. Exposures from ingesting contaminated fruits and vegetables occur via their uptake from contaminated surface soil and contaminated irrigation water.

6-1

Exposures from meat and milk occur from contamin ants in animal feed and water. Gamma radiation exposures occur in recreation while fishing, boating, and swimming. Additional recreation exposures also occur from ingesting contaminated water while swimming and from consuming fish from the River.

RESRAD Version 6.1, @Risk, and spreadsheet calculations are used to estimate and combine the exposure distributions for the critical times. RESRAD Version 6.1 computes probabilistic estimates of radiation dose distributions that result from various distributions of input parameters. Probabilistic assessment of the input parameter distributions within the spreadsheet calculations and Microshield model are performed using @Risk.

In order to account for plans of using heterogeneous Site materials for backfill and remediation, the lowest nuclide distribution coefficients are used in the analysis. This minimizes transport retardation and decay of contaminants, be fore they reach the point of exposure. This modeling conservatism allows single assessments of the Bedrock and Overburden layers to be conservatively applied site-wide. The first application of RESRAD represents the Fill layer and associated surface exposures. The second evaluates ingestion of drinking water from a well drilled into the Bedrock.

NRC's site cleanup criterion of 25 mrem/year and the EPA 4 mremryear drinking water criterion are used to determine the DCGLs for each nuclide in each subsurface material layer, based on the temporal peaks of the mean doses. As are listed in Table 6-1, the most limiting DCGLs are conservatively proposed as site-wide DCGL s for the materials deeper than one meter.

6-2

Table 6-1 Site-Wide DCGLs (pCi/g)

MINIMUM SITE SUBSURFACE DCGL NUCLIDES OF CONCERN Am-241 1.80E+01 C-14 3.10E+01 Cm-243 1.20E+02 Cm-244 1.80E+02 Co-60 2.1OE+O1 Cs-134 2.90E+01 Cs-137 5.10E+01 Eu-152 5.40E+01 Eu-154 5.OOE+01 Eu-155 2.10E+03 Fe-55 1.70E+05 H-3 1.40E+03 Nb-94 3.80E+01 Ni-59 1.70E+04 Ni-63 6.30E+03 Pu-238 6.70E+00 Pu-239 1.50E+00 Pu-240 1.60E+00 Pu-241 1.1 OE+03 Pu-242 1.60E+00 Sb-125 1.60E+01 Sr-90 4.20E+00 Tc-99 3.30E+01 U-234 1.90E+00 U-235 1.90E+00 U-238 2.00E+00 6-3

The ratio of the lowest radionuclide DCGL to the DCGL for each soil layer reveals that the most restrictive subsurface DCGLs generally occur from drinking contaminated water from the Bedrock, with slightly more than one-third from the non-drinking water pathways within the Overburden layer. Applying the minimum DCGL s for all subsurface layers conservatively results in cleanup criteria at least 75% lower than would be mandated by material-specific DCGLs.

6-4

REFERENCES GPU GPU Nuclear, Inc., Saxton Nuclear Experimental Corporation Facility, Decommissioning Environmental Report, Revision 1, February 2, 2000.

GPU GPU Nuclear, Inc., Decontamination and Decommissioning Engineering, Saxton Nuclear Experimental Corporation, Historical Site Assessment Report, March 2000.

GPU GPU Nuclear Inc., E-mail received 11 January 2002 from Mr. Barry Brosey of GPU Nuclear to Dr. Kirk K. Nielson of URS, 2002.

Grove Grove Engineering. "Microshield Version 5 User's Manual.", Grove Engineering.

1996.

H&A Haley & Aldrich, Inc., Letter dated Augus t 29, 2001 from Charles R. Butts to J.

Patrick Donnachie, GPU, Inc., Middletown, PA., 2001.

NRC U.S. Nuclear Regulatory Commission, Issuance of Amendment No. 11 to Amended Facility License No. DPR Saxton Nuclear Experimental Corporation, May 20, 1992.

NRC U.S. Nuclear Regulatory Commission, NMSS Decommissioning Standard Review Plan, NUREG-1727, 2000.

Palisade Palisade Corporation, @Risk Risk An alysis and Simulation Add-In for Microsoft Excel, Version 4.0, March 2000.

URS URS Corporation. "Proposed Conceptual and Calculational Modeling for Determining Sub-Surface DCGLs for the Saxton Nuclear Experimental Corporation Site." (RAE-42613-003-5030-2), August 2001.

R-1

APPENDIX A BASELINE RESRAD

SUMMARY

REPORTS

Appendix A This appendix contains the RESRAD and spreadsheet calculated dose distributions that are used to determine the DCGLs for the Overbur den layer, Bedrock, and River sediments. The Overburden RESRAD uncertainty output file (90 pages) is labeled as Shallow Water.

Conversely, the Bedrock RESRAD uncertainty summary output file (131 pages) is labeled as Deep Water. The spreadsheet report of recreati onal doses (2 pages) is labeled River Sediments.

APPENDIX B RIVER SEDIMENT / RECREATION ASSESSMENT MODEL

Appendix B Spreadsheet calculations are used to calculate radiation doses from recreational uses of the Juniata River. The recreation scenario describes the doses to a receptor from Juniata River water that could have become contaminated by radionuclides from riverbed sediment near the SNEC Site. Recreational doses could result from ingesting contaminated water while swimming, ingesting contaminated fish, and gamma radiation exposures while fishing, boating, and swimming.

While unit radionuclide sediment concentrations are used by Microshield to estimate external gamma radiation exposures from recreatio n activities, spreadsheet analysis is used to conservatively project corresponding River water co ncentrations for other exposure pathways.

Standard Kd contaminant partitioning is assumed between the sediments and the river water:

CSD.SPd (B-1)

CR= DVR where:

CR = River water concentration (pCi/cm 3)

C = Sediment concentration (pCi/g)

D = Contaminant depth in sediment (in)

P = Saturated hydraulic conductivity in sediment (m/yr) d = Contaminant zone length parallel to river flow (m) p = Sediment density (g/cm 3) kD = Sediment distribution coefficient (mL/g)

VR = River water flow rate above contaminant region (m 3/yr)

B-2

The annual-average contaminant concentrations in the Juniata River calculated from eqn.

(B-1) are then used to estimate ingestion exposures as:

Di.g = CR s + CR fs Uf DFnwing I wiDFwng (B-2) where Ding ingestion dose from recreational exposure (mrem/yr),

Ud = amount of river water ingested per hour swimming (m 3/hr),

t = annual time spent swimming (hr/yr),

DFw,,ng dose conversion factor for drinking water ingestion (mrem/pCi),

= river-to-fish transfer factor (pCi/kg fish flesh per pCi/m 3 river water),

Uf = amount of fish ingested (kg/yr), and DFnw,,ing dose conversion factor for non-drinking water ingestion (mrem/pCi).

Doses from equation (B-2) are then added to those estimated by Microshield to derive a cumulative TEDE to the receptor.

B-3

@RISK Summary Report General Information Workbook Name preliminary dcgls.xIs Number of Simulations 1 Number of Iterations 500 Number of Inputs 60 Number of Outputs 26 Sampling Type Latin Hypercube Simulation Start Time 1/24/02 13:37:01 Simulation Stop Time 1124102 13:37:07 Simulation Duration 0:00:06 Random Seed 2142329504 Output and Input Summary Statistics Output Name IOutput Cell ISimulation# IMinimum IMaximum iMean IStd Dev Am-241 I Recreational Dose ($Q$10 2.67454E-0i 9.60737E-01 5.70625E-06 1.40444F-01 C-14 I Recreational Dose (mr,$Q$11 0.00012462 0.00559424q 0.00074867 0 00047956 Cm-243 / Recreational Dose ($Q$12 0.00011327 0.000418181 0.0002465 6.5829E-0 Cm-244 I Recreational Dose ($Q$13 7.45498E-08 3.26508E-01 4.40651 E-O' 2.79804E-C Co-60 I Recreational Dose (m $Q$14 0.007453886 0.02773759 0.01632562 0.00436921 2000 1 Recreational Dose (mr $Q$15 0.00337112E 0.01254249: 0.00738244 0.00197565 2000 1 Recreational Dose (mr $Q$16 0.001167294 0.00434197: 0.0025557 0.00068392 Eu-1 52 1 Recreational Dose (i $Q$17 0.002817542 0.0104853, 0.00617133 0.0016516 Eu-154 1 Recreational Dose (1$Q$18 0.003576531 0.013309911 0.00783377 0.00209658 Eu-1 55 1 Recreational Dose (i $Q$19 2.08929E-05 7.77487E-00 4.57607E-0 1.2247E-0 Fe-55 i Recreational Dose (m $Q$20 1.44999E-1 1 6.50456E-1 0 8.70809E-1 5.5763E-1 H-3 / Recreational Dose (mrei $Q$21 9.99527E-11 4.0193E-0! 5.70686E-1 3.51063E-1 Nb-94 I Recreational Dose (m $Q$22 0.003613271 0.01344547$ 0.00791369 0.00211792 Ni-59 / Recreational Dose (mi $Q$23 1.93238E-11 8.66265E-10 1.16014E-11 7.42683E-1 Ni-63 / Recreational Dose (ml $Q$24 5.30945E-1 1 2.38017E-0 3.18762E-10 2.04061E-1 Pu-238 I Recreational Dose (i $Q$25 7.25066E-07 3.23085E-01 4.33777E-0 2.7704E-0 Pu-239 I Recreational Dose (1$Q$26 8.34678E-07 3.57887E-04 4.86132E-06 3.06463E-0 Pu-240 I Recreational Dose (i $Q$27 8.01853E-07 3.57409E-0, 4.79818E-00 3.06475E-0 Pu-241 I Recreational Dose (1$Q$28 1.54748E-08 6.91536E-0 9.27667E-0$ 5.93041 E-0 Pu-242 / Recreational Dose (i $Q$29 7.61347E-07 3.39239E-0,1 4.55472E-00 2.90892E-0 Sb-125 I Recreational Dose (P$Q$30 0.000751731 0.00279745 0.001646$ 0.00044065 Sr-90 I Recreational Dose (mi $Q$31 1.00037E-06 4.48049E-0,1 6.00331E-0$ 3.84159E-0 Tc-991 Recreational Dose (m $Q$32 2-74236E-08 1.21317E-0 1.63318E-0. 1.0403E-0 U-234 I Recreational Dose (m $Q$33 2.56599E-07 9.6897E-0E 1.37347E-0 8.26791 E-0 U-235 I Recreational Dose (m $Q$34 0.000137118 0.00050272 0.00029676Q 7.90933E-0 U-238 / Recreational Dose (m $Q$35 2.18618E2-0 9.17348E-0§ 1.25688E-00 7.85815E-0 page 1 of 2

@RISK Summary Report Input Name linput Cell ISmulation# jMinimum . Maximum JMean IStd Dev Sediment Dens $R$1 O_767D18557 2.846/2665; 1.btUU(JU(e U.44*iO1Z Time Spent Swimming $0$2 35.68852234 132.8136130 78.1696337* 20.9208623 Contaminant area $R$3 13.37181854 48.9265518, 29.1671603* 7.79822168 Inadvertant Water Ingestion $O$4 2.606226444 9.922127724 5.833782021 1.56208006 c depth $R$4 0.5363397 1.96056580! 1.166696506 0.31207383 Fish Consumption $O$5 11.01837444 40.2170829l 24.0322749 6.42661789 Sed Hyd Cond $R$6 15.55209255 58.956550( 35.000591 9.36501695 Sediment Porosity $0$7 0.241728216 0.89570242: 0.53669057 0.14355150 Am-241 I Radius $D$10 1.063210011 19.402797A 10.1659135 3.89112467 Am-241 I Shield Thickness $E$10 1.351988435 19.8436412$ 10.1661016 3.8905148 C-141 Radius $D$11 1.543136716 19.52194595 10.1666495 3.88924043 C-14 / Shield Thickness $E$11 1.453692317 19.552896, 10.166767 3.88882228 Cm-243 I Radius $D$12 1.540035367 19.5450649' 10.16628181 3.88758987 Cm-243 I Shield Thickness $E$12 1.308828831 19.57574081 10.1675219 3.8904025 Cm-244 1 Radius $D$13 1.451560259 19.469087( 10.1671602 3.88884269 Cm-244 I Shield Thickness $E$13 1.289750934 19.704345- 10.1659696 3.88811164 Co-601 Radius $D$14 1.28590405 19.62527084 10.1662221 3.88860714 Co-601 Shield Thickness $E$14 1.352310896 19.3869113! 10.1670249 3.88742434 Cs-1341 Radius $D$15 1.116308093 19.7458019: 10.165941 3.89354180 Cs-1 34 /Shield Thickness $E$1 5 1.420199871 19.49202531 10.1662853 3.88922323 Cs-137 / Radius $D$16 1.197746038 19.5708503 10.1658754 3.88838344 Cs-137/ Shield Thickness $E$16 1.320047498 19.5376758( 10.16632831 3.88936903 Eu-152 i Radius $D$17 1.115970135 19.7344551 10.1669524 3.89170879 Eu-I52 / Shield Thickness $E$17 1.36682272 19.4867401' 10.1661137 3.88912066 Eu-154 I Radius $D$18 1.373938441 19.81484604 10.1668969 3.8900815 Eu-154/ Shield Thickness $E$18 1.201307535 19.54681961 10.1653087 3.89020384 Eu-1 551 Radius $D$19 1.492244601 19.8091521 10.1673065 3.89145482 Eu-1 551 Shield Thickness $E$19 1.520665646 19.7777748' 10.1670426 3.88974855 Fe-551 Radius $D$20 1.339036703 19.70482821 10.1674808 3.88986400 Fe-55 / Shield Thickness $E$20 1.217291594 19.54592891 10.1656612 3.88926632 H-3 I Radius $D$21 1.142447114 19.8821487, 10.1674415 3.89305059 H-3 I Shield Thickness $E$21 1.519182801 19.6557350ý 10.1672882 3.89037299 Nb-94 I Radius $D$22 1.350493193 19.44784350 10.1661512 3.88798979 Nb-94 I Shield Thickness $E$22 1.196291924 19.49619861 10.1663315 3.89014088 Ni-591 Radius $D$23 1.134813666 19.3810520, 10.1656499 3.89077980 Ni-59 / Shield Thickness $E$23 1.451789856 19.8949527, 10.1682452 3.89123823 Ni-631 Radius $D$24 1.332678437 19.37257001 10.1650660 3.88893097 Ni-63 I Shield Thickness $E$24 1.52816081 19.5622768 10.1672096 3.89004032 Pu-238 I Radius $D$25 1.181279302 19.4142475 10.1664196 3.88894516 Pu-238 I Shield Thickness $E$25 1.428100348 19.7323799' 10.1664663 3.89193476 Pu-2391 Radius $D$26 1.081758738 19.59211731 10.1666722 3.89145606 Pu-239 I Shield Thickness $E$26 1.421127796 19.6133689 10.1669277 3.88932947 Pu-2401 Radius $D$27 1.35945034 19.39332581 10.1651973 3.89093946 Pu-240 I Shield Thickness $E$27 1.560510516 19.6340847 10.1674058 3.88708701 Pu-241 I Radius $D$28 1.55752670 19.5416545! 10.1663711 3.88826783 Pu-241 I Shield Thickness $E$28 1.09967529 19.38020701 10.1656423 3.89066505 Pu-242 I Radius $D$29 1.23954856 19.6976451! 10.16685 3.89169741 Pu-242 I Shield Thickness $E$29 1.45081186 19.6554412 10.1659598 3.88888419 Sb-125/ Radius $D$30 1.345744491 19.4415054: 10.1663665 3.88874628 Sb-1251 Shield Thickness $E$30 1.217978001 19.81005859 10.1678574 3.89322706 Sr-g0 / Radius $D$31 1.471344701 19.7866764 10.1679262 3.88976383 Sr-90 I Shield Thickness $E$31 1.322262883 19.9424018! 10.166737 3.89139730 Tc-99 I Radius $D$32 1.514995098 19.58579631 10.166456 3.8903308 Tc-99 / Shield Thickness $E$32 1.472812414 19.5508537: 10.1674020 3.8879037 U-234 I Radius $D$33 1.27129209 19.8845443 10.165865 3.8906612]

U-234 I Shield Thickness $E$33 1.432187915 19.6265106: 10.1665710 3.88896278 U-235 / Radius $D$34 1.451202631 19.4348068R 10.1662204 3.889722 U-235 / Shield Thickness $E$34 1.36649525, 19.44992631 10.1663535; 3.88902512P U-238 / Radius $D$35 1.56736159Z 10.16737031 3.8869197

- - -4 -

U-238 I Shield Thickness $E$35 1.19286906, 10.16626260 3.887951 9ý 5 page 2 of 2