ML040280028

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Calculation No. YA-CALC-00-004-03 Building Surface-Derived Concentration Guideline Levels (Dcgl).
ML040280028
Person / Time
Site: Yankee Rowe
Issue date: 01/19/2004
From: Balineau G, Harrington C, Keefer E, Littlefield P
Yankee Atomic Electric Co
To:
NRC/FSME
References
-RFPFR YA-CALC-00-004-03
Download: ML040280028 (26)
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Text

I CALCULATION TITLE PAGE Building Surface-Derived Concentraiort Guideline Levets -(DCGL)

Title- .

YA-CALC-00-004-03 Calculation Number Executive Summary:

Approvals (Print & Sign Namey

- Preparer Cynthia Harrington e 4 Date: il~ ZD3

- Preparer. Estefla Keefer ) I Date:

Reviewer. Date:

Approver (Gognizant-Manager): )Nv- f-)okp! _. Date I/ic &6L DCM FORM 1-.5-4A

- Page 514;fiftrp f M ,f .5w

CALCULATION TITLE PAGE Building Surface Derived Concentration Guideline Levels (DCGL)

Title YA-CALC-00-004-03 Calculation Number Executive Summary:

Approvals (Print & Sign Name)

Preparer: Cynthia Hanington Date:

Preparer: Estella Keefer {'ti/e1o Date: 1Z// 1/D3

' '~ V ,,

Reviewer: Date:

Approver (Cognizant Manager): Date:

DCM FORM 1.5-1A Page 1

. 1

CALCULATION TITLE PAGE Building Surface Derved Concentration Guideline Levels (DCGL)

Title YA-CALC-00-004-03 Calculation Number Executive Summary:

Nuclide specific building surface Derived Concentration Guideline Level (DCGL) values have been calculated by the use of the building occupancy scenario and the RESRAD-BUILD v3.21 dose modeling code.

A .nra..e rw4 JI1vau 10.int 0 O.-

III IL t Kmet l'411 I I IVJ Preparer. Cynthia Harrington Date:

Preparer: Estella Keefer Date:

Reviewer P-1-7e 1/ 'f/LD a Date: /

Approver (Cognizant Manager): Date:

DCM FORM 1.5-1A Page 1 3 of

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC4OO-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 2 of 8 TABLE OF CONTENTS Paae P U R P OS E : ......................................................................................................................................................... ..............................

3

SUMMARY

OF RESULTS: .............................................................................. 3 R E F E R E N C E S: .................................................................................................................................................. .............................

4 ASSUMPTIONS ............................................................................... 5 METHOD / BODY OF CALCULATION .............................................................................. 5 TABLES Pane Table 1. Building Surface DCGL Values ....................................................................... 3 Table 2. Building Surface Annual Dose per Unit Concentration and DCGL Results ....... ......... 6 Table 3. Annual Dose, by Pathway, from 1 pCilm2 Area Sources ......................................... 7 Table 4. Fraction of Total Annual Dose, by Pathway, from I pCi/M 2 Area Sources .................. 7 FIGURES Paae Figure 1 Parameter Selection Process ..................................................... 8 ATTACHMENTS No. of Paqes RESRAD-BUILD v3.21 Input Parameters to DCGL Analysis ......... ................... 9 Quantile Determination from RESRAD-BUILD Cumulative Density Functions..... 5 YA-CALC-00-004-03 CD ................................................................... 2

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 3 of 8 PURPOSE:

The purpose of this calculation is to determine nuclide specific building surface Derived Concentration Guideline Level (DCGL) values using the peak of the mean dose determined by the use of the building occupancy scenario and the RESRAD-BUILD v3.21 dose modeling code.

This methodology is in accordance with the NRC guidance provided in NUREG-1727 and NUREG-1757 [Ref. 1, Ref. 2].

SUMMARY

OF RESULTS:

NUREGs-1727 and -1757 both discuss the application of the peak of the mean dose to derive nuclide specific DCGL values. The probabilistic module of the RESRAD-BUILD code v3.21 was used to perform nuclide specific sensitivity analyses and to identify the input parameters that have the greatest potential to affect the dose from residual building surface contamination. The list of nuclides of interest at the YNPS is based on historical site information, laboratory analyses and NUREG guidance and is discussed in Ref. 3. The methodology for choosing parameter values and the results of the sensitivity analysis are discussed in Ref. 4. Based on these results, sensitive and non-sensitive parameter values were determined according to the process flowcharted in Figure 1. In summary, either the 2 ] or 75t percentiles of the probability distribution or the probability distribution itself, were chosen for sensitive and non-sensitive parameters, respectively. The BUILD code was used to determine the mean dose per unit activity concentration. In cases where all input parameters were constants, the deterministic models were used to determine the dose. This Dose Conversion Factor (DCF) was then used to calculate the corresponding DCGL.

Table 1 summarizes the nuclide specific Building Surface DCGL values based on the regulatory dose limit of 25 mrem/yr.

Table 1-Building Surface DCGL Values Nuclide DCGL DCGL Nuclide DCGL DCGL pCi/m2 dpm/1 00cm2 pCiVM 2 dpml1 00cm2 H-3 1.5E+10 3.4E+08 Cs-134 1.3E+06 2.9E+04 C-14 4.6E+08 1.OE+07 Cs-137 2.8E+06 6.3E+04 Fe-55 1.8E+09 4.OE+07 Eu-152 1.7E+06 3.7E+04 Co-60 8.1 E+05 1.8E+04 Eu-154 1.6E+06 3.4E+04 Ni-63 1.7E+09 3.7E+07 Eu-155 2.9E+07 6.5E+05 Sr-90 6.3E+06 1.4E+05 Pu-238 2.6E+05 5.7E+03 Nb-94 1.2E+06 2.6E+04 Pu-239 2.3E+05 5.1E+03 Tc-99 6.5E+08 1.4E+07 Pu-241 1.1 E+07 2.5E+05 Ag-108m 1.IE+06 2.5E+04 Am-241 2.2E+05 5.OE+03 Sb-125 4.5E+06 1.OE+05 Cm-243 3.2E+05 7.2E+03

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC4OO-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 4 of 8

REFERENCES:

1. NUREG-1727. "NMSS Decommissioning Standard Review Plan," September 2000.
2. NUREG-1757. "Consolidated NMSS Decommissioning Guidance," Volume 2: Characterization, Survey and Determination of Radiological Criteria," September 2003.
3. YA-REPT-00-001-03, Radionuclide Selection for DCGL Determination," November 2003.
4. YA-CALC-00-003-03, RESRAD-BUILD v3.21 Sensitivity Analysis for Building Occupancy,"

November 2003.

5. Code of Federal Regulations, Title 10, Section 20.1402, "Radiological Criteria for Unrestricted Uses."

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-O-04-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 5 of 8 ASSUMPTIONS The comprehensive demolition and dismantling strategy defined for the YNPS site will result in some structures remaining on site at the time of license termination. The remaining parts of buildings will generally consist of support walls, tank rooms and floor slabs. All existing ceilings will be replaced with new uncontaminated materials. The dimensions of an average room that might remain on site were determined by considering the demolition plans and the identification of walls/rooms to remain intact, and are discussed in Ref. 4.

METHOD / BODY OF CALCULATION Dose Model The DCGLs for building surfaces were calculated using the building occupancy scenario in the RESRAD-BUILD v 3.21 dose modeling code. The residual radioactivity was assumed to be uniformly distributed over the floor and four walls. The critical group for this scenario are adults performing light industrial work in the building. The pathways used to estimate the potential exposure to occupants of a building from residual radioactivity on surfaces include the following:

  • External exposure directly from the source
  • External exposure to deposited material
  • External exposure due to air submersion
  • Inhalation of airborne radioactive particulates
  • Inadvertent ingestion of radioactive material directly from the sources.

Conceptual Model The conceptual model consists of a room with fixed dimensions, uniform concentrations of residual radioactivity on five surfaces and a receptor located in the center of the room at a height of one meter.

Using the results of the sensitivity analysis [Ref. 4] and the process outlined in Figure 1, values were assigned to parameters identified as sensitive (PRCCI 2 0.1) as follows;

  • negatively correlated parameters were assigned the 25] percentile value and
  • positively correlated parameters were assigned the 75t percentile value from the probability distribution. In addition, the value of the 75t percentile was compared to the mean of the distribution and the higher value was then assigned.
  • Non-sensitive parameters, those that did not affect the value of the dose over the range of the probability distribution, maintain the distribution as the input.

The values assigned to the input parameters are presented in Attachment 1, Table 1-1.

Attachment 2 provides a summary of the method used to determine the quantile values for the probability distributions used for each parameter from NUREGICR-6697 or 6755.

DCGL Determination The annual doses per 1 pCiM 2 calculated by RESRAD-BUILD v3.21 are listed in Table 2. The nuclides followed by an (*) denotes a run that used one or more probability distributions as a parameter input and for which the annual dose is the peak of the mean as determined by the probabilistic report. All other nuclide runs used assigned 25175 percentile values. The normalized annual dose or dose conversion factor (DCF) is used to derive the DCGL in pCi/M 2

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-OO-004.03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 6 of 8 and dpm/100cm 2 as shown in the equations below. The resulting DCGL values are also listed in Table 2.

25 mrem/yr DCGL (pCi/m2) (Equation 1)

DCF (mrem/yr / pCi/rn2)

OR, DCGL (dpm/cm ) = DCGL (pCi/m2) x (0.037 dps/pCi) x (60 sec/min) x (m/1 00cm)2 (Equation 2) 2 DCGL (dprn/1 OOcm 2) = DCGL (pCi/rn ) x (2.22 dpm/pCi) x (m/1 OOcm) X 100 (Equation 3)

Table 2 - Building Surface Annual Dose per Unit Concentration and DCGL Results Nuclide DCF DCGL DCGL mrem/yr per pCi/M2 dpm/1 _cmI p~ ~~pirn pr/M~m H-3 1.6E-09 1.5E+10 3.4E+08 C-14* 5.4E-08 4.6E+08 1.OE+07 Fe-55 1.4E-08 1.8E+09 4.OE+07 Co-60 3.1E-05 8.1E+05 1.8E+04 Ni-63* 1.5E-08 1.7E+09 3.7E+07 Sr-90 4.OE-06 6.3E+06 1.4E+05 Nb-94 2.1E-05 1.2E+06 2.6E+04 Tc-99* 3.9E-08 6.5E+08 1.4E+07 Ag-108m 2.2E-05 1.1E+06 2.5E+04 Sb-125 5.5E-06 4.5E+06 1.OE+05 Cs-134 1.9E-05 1.3E+06 2.9E+04 Cs-1 37 8.8E-06 2.8E+06 6.3E+04 Eu-I 52* 1.5E-05 1.7E+06 3.7E+04 Eu-154 1.6E-05 1.6E+06 3.4E+04 Eu-1 55* 8.5E-07 2.9E+07 6.5E+05 Pu-238* 9.7E-05 2.6E+05 5.7E+03 Pu-239* 1.1E-04 2.3E+05 5.1E+03 Pu-241 2.3E-06 1.IE+07 2.5E+05 Am-241* 1.IE-04 2.2E+05 5.OE+03 Cm-243 7.7E-05 3.2E+05 7.2E+03

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 7 of 8 Table 3 provides a summary of the dose by pathway. Table 4 presents the fraction of the total dose represented by each pathway.

Table 3 -Annual Dose, by Pathway, from 1.0 pCi/M 2 Area Sources Nuclide Total Extemal Deposition Immersion Inhalation Radon Ingestion H-3 1.64E-09 O.OOE+00 O.OOE+00 O.OOE+00 5.47E-11 O.OOE+00 1.59E-09 C-14* 5.39E-08 3.02E-10 1.72E-14 3.02E-17 2.95E-11 O.OOE+00 5.37E-08 Fe-55 1.38E-08 O.OOE+00 O.OOE+00 O.OOE+00 3.35E-11 O.OOE+00 1.37E-08 Co-60 3.07E-05 3.OOE-05 4.28E-09 1.24E-1 1 2.27E-09 O.OOE+00 6.47E-07 Ni-63* 1.49E-08 O.OOE+00 O.OOE+00 O.OOE+00 2.56E-10 O.OOE+00 1.46E-08 Sr-90 3.98E-06 7.67E-08 6.05E-15 7.63E-14 5.27E-08 O.OOE+00 3.85E-06 Nb-94 2.14E-05 2.12E-05 2.76E-08 1.04E-11 5.84E-09 O.OOE+00 1.83E-07 Tc-99* 3.86E-08 1.07E-09 6.32E-14 2.19E-16 1.18E-10 O.OOE+00 3.74E-08 Ag-108m 2.22E-05 2.20E-05 2.15E-08 9.85E-12 3.74E-09 e.OOE+00 1.95E-07 Sb-125 5.51 E-06 5.43E-06 4.28E-10 1.85E-12 1.34E-10 O.OOE+00 8.27E-08 Cs-134 1.94E-05 1.78E-05 1.06E-09 6.64E-12 4.26E-10 O.OOE+00 1.60E-06 Cs-137 8.82E-06 7.54E-06 4.05E-09 3.11 E-12 3.81E-10 O.OOE+00 1.27E-06 Eu-152* 1.51E-05 1.50E-05 1.76E-10 7.37E-12 3.02E-09 O.OOE+00 1.62E-07 Eu-154 1.61 E-05 1.58E-05 3.51 E-09 6.37E-12 3.10E-09 O.OOE+00 2.35E-07 Eu-155* 8.49E-07 8.09E-07 1.60E-11 8.95E-13 1.56E-09 O.OOE+00 3.64E-08 Pu-238* 9.72E-05 3.20E-08 7.OOE-14 1.90E-15 1.60E-05 2.47E-21 8.11 E-05 Pu-239* 1.08E-04 1.62E-08 3.48E-12 1.65E-15 1.75E-05 O.OOE+00 9.01 E-05 Pu-241 2.26E-06 6.77E-09 5.48E-16 3.93E-15 4.33E-07 O.OOE+00 1.82E-06 Am-241

  • 1.11 E-04 5.65E-07 1.81 E-05 7.32E-1 1 3.19E-1 3 9.27E-05 O.OOE+00 Cm-243 7.73E-05 1.74E-06 1.37E-13 2.27E-12 1.24E-05 O.OOE+00 6.32E-05 Table 4 - Fraction of Total Annual Dose, by Pathway, from 1.0 pCi/M 2 Area Sources a Nuclide Total External Deposition Immersion Inhalation Radon Ingestion H-3 1.000 0.000 0.000 0.000 0.033 0.000 0.967 C 1.000 0.006 0.000 0.000 0.001 0.000 0.998 Fe-55 1.000 0.000 0.000 0.000 0.002 0.000 0.998 Co-60 1.000 0.979 0.000 0.000 0.000 0.000 0.021 Ni-63* 1.000 0.000 0.000 0.000 0.017 0.000 0.983 Sr-90 1.000 0.019 0.000 0.000 0.013 0.000 0.967 Nb-94 1.000 0.990 0.001 0.000 0.000 0.000 0.009 Tc_99* 1.000 0.028 0.000 0.000 0.003 0.000 0.969 Ag-108m 1.000 0.990 0.001 0.000 0.000 0.000 0.009 Sb-125 1.000 0.985 0.000 0.000 0.000 0.000 0.015 Cs-134 1.000 0.918 0.000 0.000 0.000 0.000 0.082 Cs-137 1.000 0.856 0.000 0.000 0.000 0.000 0.144 Eu-152* 1.000 0.989 0.000 0.000 0.000 0.000 0.011 Eu-154 1.000 0.985 0.000 0.000 0.000 0.000 0.015 Eu-155* 1.000 0.951 0.000 0.000 0.002 0.000 0.043 Pu-238* 1.000 0.000 0.000 0.000 0.164 0.000 0.833 Pu-239* 1.000 0.000 0.000 0.000 0.162 0.000 0.835 Pu-241 1.000 0.003 0.000 0.000 0.192 0.000 0.805 Am-241* 1.000 0.005 0.163 0.000 0.000 0.833 0.000 Cm-243 1.000 0.022 0.000 0.000 0.160 0.000 0.817 a Due to rounding, the sum of the fractions may not total 1.
  • denotes a run that used one or more probability distributions as a parameter input and for which the annual dose is the peak of the mean as determined by the probabilistic report. All other nuclide runs used assigned 25175 percentile values.

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Page 8 of 8 Figure 1 Parameter Selection Process Select model paamte Classify as Behavioral, Metabolic or Physical

'J 4 'Jr Behavioral parameter I Metabolic parameter I l Physical parameter I

Assign value from NUREGICR-5512, Vol.3, NUREG/CR 6697,6755 Inpt aree Assign value from NUREGICR-5512, Vol.3, NUREGICR 6697,6755 I re Site data

~~~~valbe No Ys Input parameter jlr \ value Classify as Priority 1 or 2, or Priority 3 P-I l Priority 1 or2 l Pniority 3 p rat . ' I Assign distribution from Assign value from NUREG 5512 Vol 3, NUREGICR-6697, AK. C or NUREGICR-6697, NUREGICR-6755 NUREGICR-6755 Complete sensitivity analysis Using RESRAD 6-21 or C Input parameter value D

l RESRAD, S. = 0.25 RESRAD-BUILD 3.21 l RESRAD-BUILD, S. = 0.10 l Classify parameter as Sensitive or 'Non-sensitive' I

Sensitive if IPRCCI 2 So l I 'Non-sensitive if IPRCCI < S, I

4, Assign site-specific value, TEDE positively correlated to TIEDE negatively correlated to I median value or distribution parameter if PRCC > 0 parameter if PRCC < 0

.. ~~~ Assign shte-specific value or Inut parameter value Assign site-specific value or distribution Asdisitionfor 25 Quantile or 75 Quantile (or mean) r v ea l u ~

Q+5t Q 5,Te a

( itpaaetrvl (_Inupraeerv lue ,

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-OO-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:1 of 9 Attachment 1 RESRAD-BUILD v3.21 Input Parameters to DCGL Runs Building Occupancy

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment I Page:2 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type' Nuclideb Treatment' Valueld Basis Distribution's StatistIcal Parameters Distribution 1 2 3 4 Median Exposure Duration (days) B All D 365.25 NUREGICR-5512, Vol.3, 5.2.1 NR NR NR NR NR Indoor Fraction B All 0.267 NUREGICR-5512, Vol. 3, 5.2.2 NR NR NR NR NR Evaluation Time (year) P All D 0 t0 corresponds maximum NR NR NR NR NR dose over the first year

.___________ (year 9 for Pu-241) .

Number of Rooms P All D 1 NUREG/CR-5512 NR NR NR NR NR Deposition Velocity (m/sec) P H-3 D 1.51E-05 2 5 percentile value NR NR .

P Fe-55 D 1.51E-05 25 percentile value NR NR p Co-60 D 4.79E-04 75 percentile value NR NR P Sr-90 D 1.51 E-05 25"' percentile value NR NR P Nb-94 D 4.79E-04 75"' percentile value NR NR P Ag-108m D 4.79E-04 75"' percentile value NR NR P Sb-125 D 4.79E-04 75'n percentile value NR NR P Cs-134 D 4.79E-04 75' percentile value NR NR P Cs-137 D 4.79E-04 75n percentile value NR NR P Eu-1 54 D 4.79E-04 75' percentile value NR NR P Pu-241 D 1.51E-05 25n percentile value NR NR P Cm-243 D 1.51E-05 25' percentile value NR NR P All others S Loguniform NUREG/CR-6755, 3.3 2.70E-06 2.70E-03 8.53E-05 Resuspension Rate (sec ) P H-3 D 1.02E-06 Mean value NR NR P Fe-55 D 1.02E-06 Mean value NR NR P Co-60 D 6.75E-10 25n percentile value NR NR P Ni-63 D 1.02E-06 Mean value NR NR P Sr-90 D 1.02E-06 Mean value NR NR P Nb-94 D 6.75E-10 25n percentile value NR NR P Ag-108 D 6.75E-10 25' percentile value NR NR P Sb-125 D 6.75E-10 25' percentile value NR NR P_ _ _ Cs-134 D 6.75E-10 25n percentile value NR NR

_ _ _P Cs-137 D 6.75E-10 25'n percentile value NR NR

_ _ _ P

_ Eu-154 D 6.75E-10 25"' percentile value NR NR P Pu-238 D 1.02E-06 Mean value NR NR

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:3 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type" Nuclideb Treatment Value/d Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median Pu-241 1.02E-06 Mean value NR NR P Cm-243 D 1.02E-06 Mean value NR NR P All others S Loguniform NUREG/CR-6755, 3.1 2.5E-11 1.3E-5 1.83E-08 Air exchange rate for room (1/ h) B All D 1.52 NUREG/CR-6697, Att.C, 7.4 NR NR NR NR NR and NUREG/CR-6755, 3.2 Room area (M2) P All D 19.71 Site-specific model, Ref. 4 NR NR NR NR NR Room height (m) P All D 3.51 Site-specific model, Ref. 4 NR NR NR NR NR Time fraction B All D 1 NUREG/CR-5512 NR NR NR NR NR Breathing rate (m3/day) B All D 33.6 NUREG/CR-5512 Vol. 3 5.3 NR NR NR NR NR Indirect ingestion rate (m2 /hr) B All D 0 NUREG/CR-5512 Vol. 3 5.2.3 NR NR NR NR NR Indirect ingestion is not modeled Receptor location: x,y,z (m) B All D 2.22, 2.22,1 NUREG/CR-5512 NR NR NR NR NR Shielding thickness (cm) P All D 0 Site-specific model- No NR NR NR NR NR Shielding assumed Shielding density (g/cc) P All D 0 Site-specific model -No NR NR NR NR NR shielding assumed Shielding material P All D None Site-specific model - No NR NR NR NR NR shielding assumed Number of sources P All D 5 Site-specific model, Ref. 4 NR NR NR NR NR External dose conversion factor M All D RESRAD-BUILD FGR 12 NR NR NR NR NR

((mrem/yr)/(dpm/m 2 )) default Air submersion dose conversion factor M All D RESRAD-BUILD FGR 12 NR NR NR NR NR 3

((mrem/yr)/(pCVm )) default Inhalation dose conversion factor M All D RESRAD-BUILD FGR 11 NR NR NR NR NR (mrem/pCUg) default Ingestion dose conversion factor M All D RESRAD-BUILD FGR 11 NR NR NR NR NR (mrem/pCi/g) default Source 1. Floor ._:_:________

Type P All D Area NUREG/CR-5512 NR NR NR NR NR Direction P All 0 Z NUREG/CR-5512 NR NR NR NR NR Location of center of source: x,yz (m) P All D 2.22, 2.22, 0 Site-specific model, Ref. 4 NR NR NR NR NR Area (m2) P All D 19.71 Site-specific model, Ref. 4 NR NR NR NR NR Air fraction for H-3 B All D 1 NUREG/CR-6697, Att. C, 8.6 NR NR NR NR NR

Project: Yankee Rowe icense Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:4 of 9 Table 1-4 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Typea Nuclideb Treatment* Value/d Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median Air fraction (for all nuclides except H- B All D 0.07 NUREG/CR-6697, Att. C, 8.6 NR NR NR NR NR 3)

Direct ingestion (hr-1) B All D 1.34E-6 NUREG/CR-5512, Vol. 3, 5.2.3 NR NR NR NR NR 1._1 E-04m 2/h / 82.03 m2 _ _ _ _

Removable fraction P All D 0.1 NUREG-1 727 Table C 7.1 1 NR NR NR NR NR NUREGICR-6755, 3.5 .

Time for source removal (days) P H-3 D 18240 25h percentile value NR NR NR NR NR P C-14 D 52777 75h percentile value NR NR NR NR NR P Fe-55 52777 75' percentile value NR NR NR NR NR P Co-60 0 52777 75' percentile value NR NR NR NR NR

' Ni-63 D 18240 25h percentile value NR NR NR NR NR P' Sr-90 D 18240 25 h percentile value NR NR NR NR NR P Nb-94 D 52777 7 5' percentile value NR NR NR NR NR P Tc-99 0 52777 75" percentile value NR NR NR NR NR

. Ag-108m 0 52777 75h percentile value NR NR NR NR NR P Sb-125 D 52777 7 5 th percentile value NR NR NR NR NR P Cs-1 34 D 52777 7 5 thpercentile value NR NR NR NR NR P Cs-137 D 52777 75th percentile value NR NR NR NR NR P Eu-1 52 D 52777 75" percentile value NR NR NR NR NR P Eu-1 54 D 52777 75h percentile value NR NR NR NR NR P Eu-1 55 D 18240 2 5th percentile value NR NR NR NR NR P Pu-238 D 18240 25" percentile value NR NR NR NR NR P Pu-239 D 18240 25' percentile value NR NR NR NR NR P Pu-241 D 18240 25th percentile value NR NR NR NR NR

' Am-241 D 18240 25" percentile value NR NR NR NR NR

_ Cm-243 D 18240 25" percentile value NR NR NR NR NR Radionuclide concentration (pCiM 2) P All _ 1 Allows for proportional DCGL NR NR NR NR NR calculation Source 2,We.St W. , Wall -, _tW.

Type P All D Area NUREGICR-5512 NR NR NR NR NR

Project: Yankee Rowe Ucense Tennination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:5 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type' Nuclideb Treatment' Valueid Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median Direction P All D X NUREG/CR-5512 NR NR NR NR NR Location of center of source: x,y,z (m) P All D 0, 2.22, 1.76 Site-specific model, Ref. 4 NR NR NR NR NR Area (m2) P All D 15.58 Site-specific model, Ref. 4 NR NR NR NR NR Air fraction for H-3 B All D 1 NUREG/CR-6697 Aft C, 8.6 NR NR NR NR NR Air fraction (for all nuclides except H- B All D 0.07 NUREG/CR-6697 At C, 8.6 NR NR NR NR NR Direct ingestion (hr-1) B All D 1.34E-6 NUREG/CR-5512 Vol 3, 5.2.3 NR NR NR NR NR 1.1E-04m 2 /h / 82.03m 2 Removable fraction P All D 0.1 NUREG-1 727 Table C 7.1 / NR NR NR NR NR NUREG/CR-6755. 3.5 Time for source removal (days) P H-3 D 18240 25t" percentile value NR NR NR NR NR P C-14 D 52777 75 percentile value NR NR NR NR NR P Fe-55 D 52777 75' percentile value NR NR NR NR NR P Co-60 D 52777 75" percentile value NR NR NR NR NR P Ni-63 D 18240 25"' percentile value NR NR NR NR NR P Sr-90 D 18240 25" percentile value NR NR NR NR NR P Nb-94 D 52777 75" percentile value NR NR NR NR NR P Tc-99 D 52777 75f" percentile value NR NR NR NR NR P Ag-I 08m D 52777 75" percentile value NR NR NR NR NR P Sb-1825 D 52777 75" percentile value NR NR NR NR NR P Cs-134 D 52777 75" percentile value NR NR NR NR. NR P Cs-1 37 D 52777 75" percentile value NR NR NR NR NR P Eu-1 52 D 52777 75" percentile value NR NR NR NR NR P Eu-154 D 52777 75" percentile value NR NR NR NR NR P Eu-155 D 18240 25" percentile value NR NR NR NR NR P Pu-238 D 18240 25"' percentile value NR NR NR NR NR P Pu-239 D 18240 25"' percentile value NR NR NR NR NR P Pu-241 D 18240 25" percentile value NR NR NR NR NR P Am-241 D 18240 25" percentile value NR NR NR NR NR P Cm-243 D 18240 25" percentile value NR NR NR NR NR Radionuclide concentration (pCiM 2) P All D 1 Allows for proportional DCGL NR NR NR NR NR

_ _ _ _ _ _itinn I Type N a P All I D Area NUREG/CR-5512 lNR NR lNR INR NR Direction P All D l I NUREG/CR-5512 NR l NR NR INR NR

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-OO004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:6 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type" Nuclldeb Treatment! Value/d Basis Distribution's Statistical Parameters Distribution I 2 3 4 Median Location of center of source: x,y,z (m) P All D 2.22, 4.44, 1.76 Site-specific model, Ref. 4 NR NR NR NR NR Area (m2) P All D 15.58 Site-specific model, Ref. 4 NR NR NR NR NR Air fraction for H-3 B All D 1 NUREG/CR-6697 Att C, 8.6 NR NR NR NR NR Air fraction (for all nuclides except H- B All D 0.07 NUREG/CR-6697 At C, 8.6 NR NR NR NR NR 3)

Direct ingestion (hr-1) B All D 1.34E-6 NUREG/CR-5512 Vol 3,5.2.3 NR NR NR NR NR 1.1E-04m 2 /h / 82.03m 2 Removable fraction P All D 0.1 NUREG-1 727 Table C 7.1 / NR NR NR NR NR NUREG/CR-6755, 3.5 Time for source removal (days) H-3 D 18240 25 percentile value NR NR NR NR NR pD C-14 D 52777 75' percentile value NR NR NR NR NR

.e-55 D 52777 7 5 th percentile value HR NR NR NR NR P Fe-65 D 52777 75 t percentile value NR NR NR NR NR Co-60 D 52777 75th percentile value NR NR NR NR NR Ni-63 18240 25 'f percentile value NR NR NR NR NR P Sr-90 D 18240 25' percentile value NR NR NR NR NR PD Nb-94 D 52777 76th percentile value NR NR NR NR NR

. Ag- 0 52777 7 5 ' percentile value NR H R NR NR ID Sb-2 D 52777 75h percentile value NR NR NR NR NR D s-103 D 52777 75th percentile value NR NR NR NR NR Cs-134 D 52777 7 5' percentile value NR NR NR NR NR ID Eu-i7 52 0 52777 75 h percentile value HR NR NR HR NR P Eu-14 D 52777 7Se percentile value NR NR NR NR NR

_ Eu-15 D 52777 75 ' percentile value NR NR NR NR NR P Eu-152 18240 2e5 percentile value NR NR NR NR NR ID Pu-23 D 18240 25' percentile value NR NR NR NR NR P Pu-21 D 18240 25 percentile value NR NR NR NR NR P Pu-241 D 18240 251 percentile value NR NR NR NR NR P Am-241 D 18240 25h percentile value NR NR NR NR NR UP Cm-243 D 25m percentile value NR NR NR NR NR 18240

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:7 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Typea Nucildeb Treatment' Valuef1 Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median Radionuclide concentration (pCi/m 2) P All D 1 Allows for proportional DCGL NR NR NR NR NR

__________________ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ clcl uulatio ai nn_ _ _ _ __ _ _ _ j __ _ _ __ _ _ _ _ _ __ca Source 4, East Wall - ..

Type P All D Area NUREG/CR-5512 NR NR NR NR NR Direction P All D X NUREG/CR-5512 NR NR NR NR NR Location of center of source: x,y,z (m) P All D 4.44, 2.22, 1.76 Site-specific model, Ref. 4 NR NR NR NR NR Area (m2) P All D 15.58 Site-specific model, Ref. 4 NR NR NR NR NR Air fraction for H-3 B All D 1 NUREG/CR-6697, Aii C, 8.6 NR NR NR NR NR Air fraction (for all nuclides except H- B All D 0.07 NUREG/CR-6697, Att C, 8.6 NR NR NR NR NR Direct ingestion (hr-1) B All D 1.34E-6 NUREG/CR-5512, 5.2.3 NR NR NR NR NR 2 2 1.i1 E-04m /h / 82.03m Removable fraction P All D 0.1 NUREG-1727 Table C 7.1 NR NR NR NR NR NUREG/CR-6755, 3.5 Time for source removal (days) H-3 D 18240 25eh percentile value NR NR NR NR NR P C-14 D 52777 751 percentile value NR NR NR NR NR P Fe-55 D 52777 75' percentile value NR NR NR NR NR Co-60 D 52777 75h percentile value NR NR NR NR NR Ni-63 D 18240 251 percentile value NR NR NR NR NR Sr-90 D 18240 251 percentile value NR NR NR NR NR P X X Nb-94 D 52777 751 percentile value NR NR NR NR NR Tc-99 52777 75th percentile value NR NR NR NR NR P Ag-108m D 52777 75' percentile value NR NR NR NR NR P Sb-125 D 52777 75t percentile value NR NR NR NR NR P Cs-134 D 52777 751 percentile value NR NR NR NR NR P Cs-137 D 52777 75' percentile value NR NR NR NR NR

_ Eu-152 D 52777 751 percentile value NR NR NR NR NR P Eu-154 D 52777 75h percentile value NR NR NR NR NR Eu-I155 D 18240 251 percentile value NR NR NR NR NR

- Pu-238 I 18240 25t percentile value NR NR NR NR NR

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 1 Page:8 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type' Nuclideb Treatment! ValuefO Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median

- Pu-239 18240 25percentilevalue NR -- NR NR NR NR

_ Pu-21 D 18240 25 percentile value NR NR NR NR NR P Am-241 D 18240 25" percentile value NR NR NR NR NR D Cm-243 D 18240 25" percentile value NR NR NR NR NR 2

Radionuclide concentration (pCi/m ) P All D Allows for proportional DCGL NR NR NR NR NR calculation Source 5. South Wall ,_,-_.

Type P All D Area NUREG/CR-5512 NR NR NR NR NR Direction P All D Y NUREG/CR-5512 NR NR NR NR NR Location of center of source: x,y,z (m) P All D 2.22, 0,1.76 Site-specific model, Ref. 4 NR NR NR NR NR Area (m2) P All D 15.58 Site-specific model, Ref. 4 NR NR NR NR NR Air fraction for H-3 B All D 1 NUREG/CR-6697 Aft C, 8.6 NR NR NR NR NR Air fraction (for all nuclides except H- B All D 0.07 NUREG/CR-6697 Att C, 8.6 NR NR NR NR NR Direct ingestion (hr-1) B All D 1.34E-6 NUREG/CR-5512, 5.2.3 NR NR NR NR NR 1.IE-04m/h 82.03m2 Removable fraction P All D 0.1 NUREG-1 727 Table C 7.1 NR NR NR NR NR NUREG/CR-6755, 3.5 Time for source removal (days) P H-3 D 18240 25h percentile value NR NR NR NR NR P C-14 D 52777 75" percentile value NR NR NR NR NR' P Fe-55 D 52777 75"' percentile value NR NR NR NR NR P Co-60 D 52777 75" percentile value NR NR NR NR NR Ni-63 D 18240 25" percentile value NR NR NR NR NR Sr-90 D 18240 25" percentile value NR NR NR NR NR Nb-94 D 52777 75" percentile value NR NR NR NR NR Tc-99 D 52777 75" percentile value NR NR NR NR NR P Ag-108m D 52777 75" percentile value NR NR NR NR NR P Sb-125 D 52777 75" percentile value NR NR NR NR NR P' Cs-1 34 D 52777 75" percentile value NR NR NR NR NR Cs-137 D 52777 75" percentile value NR NR NR HR NR

Project: Yankee Rowe Ucense Termination Plan Calculation No. YA-CALC-OO00403 l

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment I Page:9 of 9 Table 1-1 RESRAD-BUILD v3.21 Input Parameters for DCGL Runs Building Occupancy Parameter (unit) Type" Nucildeb Treatment' Valua/d Basis Distribution's Statistical Parameters Distribution 1 2 3 4 Median

- Eu-12 75tpercentilevalue NR -52777 NR NR NR NR P Eu-154 D 52777 75' percentile value NR NR NR NR NR P Eu-155 18240 25' percentile value NR NR NR NR NR P Pu-238 D 18240 25e percentile value NR NR NR NR NR P' Pu-239 D 18240 251 percentile value NR NR NR NR NR Pu-241 D 18240 25' percentile value NR NR NR NR NR Am-241 D 18240 25 percentile value NR NR NR NR NR P Cm-243 D 18240 25t percentile value NR NR NR NR NR 2

Radionuclide concentration (pCM ) P All D I Allows for proportional DCGL NR NR NR NR NR

_____ _______________ ____ ____ _ __ _ __ _ __ I__ _ _ _ _ I__ _ _ _ _ _ _ _ _ _ I__ca lcu la tio n _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

NOTES P = physical, B = behavioral, M = Metabolic (NUREG/CR-6697 Aft B, Table 4.3) b 1 = high priority parameter, 2 = medium priority parameter, 3 = low priority parameter (NUREG/CR-6697 Aft B, Table 4.3)

D = deterministic, S = stochastic (Figure 1) d Statistical Parameters Loguniform 1 = minimum, 2 = maximum NR - None Required Input Correlations used only if both distributions used as inputs:

Resuspension Rate and Deposition Velocity = 0.9 Run Specifications: Random Seed = 1000 Number of Observations = 300 Number of Repetitions = 1 Dose Integrations = 5

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 2 Page:1 of 5 Attachment 2 Quantile Determination from RESRAD-BUILD Cumulative Density Functions

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 2 Page:2 of 5 Objective:

Determine the 25h, 75t, 50& percentiles and the mean for the probability density functions used in the probabilistic modules of the RESRAD Build code.

Method:

The Uncertainty Graphics module of the RESRAD-BUILD code provides graphical representations of various Statistical Objects used in a probabilistic run. For each probability density function entered as an input, the RESRAD-BUILD code integrates the area under curve and plots the cumulative density distribution. The probability density functions are the parametric distributions published in NUREG/CR-6697 and 6755.

Within the RESRAD-BUILD code, the 'Results, Graphics" output displays a plot of the cumulative density (or cumulative probability) for each Input Vector as determined by the number of observations chosen by the user. For the purpose of using these graphs to obtain the quantile values for sensitive RESRAD-BUILD parameters, the maximum number of observations, 2000, was used. This means that 2000 integration points were used to develop the graph. Right clicking the mouse inside the plot area brings up the plotted x and y data; parameter value vs. cumulative density. Figure 2-1 shows the RESRAD-BUILD "Uncertainty Graphics, Result, Graphics' window with the data visible in the Data Grid Editor" window.

Figures 2-1, 2-2 and 2-3 show the Cumulative Probability for Deposition Velocity (UD).

NUREG/CR-6755 Probability Density Distribution Parameters Distribution Type: Loguniform Minimum: 2.7E-06 m/sec Maximum: 2.7E-03 m/sec The results of the sensitivity analysis indicate that the deposition velocity is a sensitive parameter and depending on the nuclide can be either negatively or positively correlated to the dose. The 25th percentile is the conservative value assigned if the parameter is negatively correlated and is obtained from the "Data Grid Editor" corresponding to the cdf value of 0.25. The 75t percentile is the conservative value assigned if the parameter is positively correlated is obtained from the same graph corresponding to a cdf value of 0.75.

Conservative Values:

25%-tile: 1.514E-05 m/sec 50%-tile: 8.533e-05 m/sec 75%-tile: 4.786E-04 m/sec The mean value for the resuspension rate distribution was calculated by exporting the 2000 data points corresponding to the DKSUS input vector and calculating an average.

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03 -

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 2 Page:3 of 5 Figure 2-1 RESRAD-BUILD Uncertainty Graphics Cumulative Density Plot and 25%-tile Value Cumulative Probability for Deposition Velocity rstatuetirA IlC.AewD~k Obgecl 1.0 IPdmmy Object 09 00 lfrputVecta z O.8 ir 0.7.

Et knert Delete 0.6 [I~ C! F-4-C2 I 61 A 0.6 A.48696.-COS 0247 cwlw OA R4 if, 1 .49l74405 0247 AP*

i I" 0.3 02485 H*

ft4,8 IAWWg305 C3 02 '~R49 I Sawa7-=0 029 -

1.61021.0O5S 0.249S 0.1 URSH

.Ii l1538e.WS5 0a.25 9 .. _

hi C_fwl. C; n - I 0.0 I ~~~~... ..

]

Gi S~~~s ----- _. _- ..

Inp.A Paramter 00000 0 --- ---

Raw Labe: 1 Rabzwr

'UD .zJ Cokirm Labelc:

I .L 6008MMMUMM" Figure 2-2 RESRAD-BUILD Uncertainty Graphics Cumulative Density.Plot and 75%-tile.Value kP SP-AcaP tb- arrat stai Pld Te -

lCinx Dersi t Cumulative Probability for Deposion Velocity Stat~atia Obiec! 1.0 Pn"M Object 09 0.6 - 0-46 E Irs.trt neee

~~~~~~~~~~~~~~~~~~~ . _. - OK
- L  ; i a 0 i R1497 0.00047431 0 7465 f
; --! . :if:-0 .7 J !

t:

A sJ :0 R143 R1Sw -. 1000o47ess1 0o.00475 B 1 0i49 0----- Cance 0.3 R If.: 0.745 02 RI5l . 0WN14301 07505 0.1 9l15) 0 00404014 07515 0.01fl l g~ ~ 0.0000 0 f l Row Label:.

luD. okw~u

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 2 Page:4 of 5 Figure 2-3 RESRAD-BUILD Uncertainty Graphics Cumulative Density Plot and 50%-tile Value Q *0,.-1`17 "2-7;,f.-~ -~ -177-1-1t~"79+-

k'  ; -- L- ",x piwSpeccaiI Prmtes 5 I Resuts TeAd i aphic, K-P TO - - -- --

IC W D y Cumulative Probability for Deposition Velocity St~~utcaf~~b~~ect 1.0 -

Pm5y Obed 10.9 frpiVcta 02 .

t z;0.7- * ,S1 E& W t Delet

.0.6 0.6* muzoe

  • s32ssesi e 0 l 2 fR10eila ktaF: 4367e.5 05soo OA -- -

.~~~~~~~~~~~18 F36 R1003 8S0214-00 6-i- 05015iHe 002- C 4 A 0.3 X L R1W4~I

~~~~~Rl364276.00 8S4.-0 0 02 e50 0.2 R100OS 8h095e=516 05025 RIOO? 677M0sm 050

:0:0.0

.t,Y~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~...

-l.z.Gr 0.0 *~~~ Y7AE1 InpsA Paimta, 0.0000 R flow IM Row-_: l1

_ A C4" b l

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-0-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 2 Page:5 of 5 The table below summarizes the percentiles for the RESRAD-BUILD distributions and provides a comparison of the median value with published NUREG/CR-6755 median values to validate the approach for other distributions.

Table 2-1: YR Distribution Percentile Values and Comparison of Median with Those Published in NUREG 6755 Parameter Build Values a NUREG/CR- 6755 Values 0.25 0.5 0.75 0.25 0.5 0.75 UD - 2000 1.5138e-005 8.53295e-005 4.78581 e-004 N/A 8.55E-05 N/A DKSUS-2000b 6.74988e-010 1.8314e-008 4.95357e-007 N/A N/A N/A RFO(1,1) -2000c 18233.5 33241.1 52760 N/A 33255 N/A RFO(2,1) - 2000c 18244.6 33253.1 52789 N/A 33255 N/A RFO(3,1) - 2000c 18243 33253.9 52766.7 N/A 33255 N/A RFO(4,1) - 2000C 18232 33226.1 52792.3 N/A 33255 N/A RFO(5,1) - 20000 18247.5 33240.5 52777 N/A 33255 N/A Average source removal time 18240.12 33242.94 52777.00 N/A 33255 N/A (5 sources) - 20000 a The BUILD values were compared for multiple radionuclide runs and were found to be the same, when the numbers of observations were the same.

b The median value in NUREG/CR-6755 doses not reflect the updated distribution for the resuspension rate (DKSUS). Values for this distribution were determined by the same method as was validated for the other distributions.

C The average median source removal time for all five sources, for the 2000 observation run, was 33243 days, which compares favorably with the NUREG/CR- 6755 parent distribution value of 33255 days (0.04% difference).

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 3 Page:1 of 2 Attachment 3 YA-CALC-00-004-03 CD

Project: Yankee Rowe License Termination Plan Calculation No. YA-CALC-00-004-03

Subject:

Derived Concentration Guideline Levels for Building Surfaces Attachment 3 Page:2 of 2 The enclosed CD contains the electronic image files containing the RESRAD-BUILD resradb.rpt and resbmc.rpt report output pages that can be used to verify deterministic inputs and probabilistic inputs and outputs, respectively.

CD Name: YA-CALC-00-004-03 File: Deterministic Appendix. Build DCGLs.pdf Probabilistic Appendix.Build DCGLs.pdf

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