ML21046A066

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Westinghouse Electric Co, LLC - NRC Semi-Annual Discharge Report, July - December 2020
ML21046A066
Person / Time
Site: Westinghouse
Issue date: 02/15/2021
From: Ferguson J
Westinghouse
To:
Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
LTR-RAC-21-21
Download: ML21046A066 (23)
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Text

e Westinghouse Page 1 of 2 Westinghouse Electri c Company LLC Nu clea r Fuel Columbia Fuel Site 5801 Bluff Road Hopkins, South Carolina 29061 USA Document Control Desk, Director Direct tel: 803-64 7-1000 Office of Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington , DC 20555-0001 cc: USNRC , Region II Our ref: LTR-RAC-21-21 245 Peachtree Center Ave , NE, Suite 1200 Atlanta , Georgia 30303-1257

Subject:

SNM-1107/70-1151 NRC Semi-Annual Discharge Report February 15, 2021 July - December 2020

Dear Sir:

The following report fulfills regulatory requirements as listed in 10 CFR 40.65 and 10 CFR 70.59, "Effluent Monitoring Reporting Requirements ." For the six-month period of July 1, 2020, through December 31, 2020, the following quantities of radionuclides were released to the unrestricted area by the Westinghouse Electric Company's Columbia, South Carolina Nuclear Fuel Plant:

Total Total Regulatory 6-month 6-month Discharge Parameter Concentration emissions Measured Limit (tJCi) Concentration Uranium (analyzed as Gaseous 253 1.6E-16 µCi/ml* 5 E-14 µCi/ml gross alpha) 1,402 U-234 Liquid 67 U-235 1.2E-08 µCi/ml 3 E-07 µCi/ml Effluent# 244 U-238 2,866 Tc-99 2.1E-08 µCi/ml 6 E-05 µCi/ml

  • Includes a dispersion factor of 1000 to account for dilution between the release point and the nearest site boundary
  1. Sum of fractions (SOF) equates to less than 1.0.

As shown above, the effluent releases are within the NRC's regulatory limits designed to protect public health and safety.

Gaseous effluent results were obtained from point source gross alpha analysis of stack gas effluent, and the individual radionuclide activity composition is inferred from the calculated average enrichment (85.25% U-234, 3.28% U-235, and 11 .48% U-238) . Tc-99 is not reported for gaseous effluents as the quantities of Tc-99 detected during benchmark testing of gaseous emissions were below the thresholds that would necessitate reporting.

Liquid effluent values were obtained by analysis of composite proportional samples prior to discharge to the Congaree River and basing the activity on the calculated average enrichment.

All liquid discharges are pumped through a single discharge line to the Congaree River. Liquid effluent composites were analyzed by alpha spectroscopy , and significant quantities of U-236 were not detected using this method. The total liquid effluent volume released to the Congaree River during the second half of 2020 was 6.63 E+10 milliliters (ml) .

© 202 1 Westinghouse Electric Company LLC All R ights Reserved

Page 2 of 2 Our ref: LTR-RAC-21-21 February 15, 2021 Calculated values have been reported for all results, due to variability of minimum detection concentrations (MDC). Negative values are reported as zero.

To meet the requested dosage information outlined in Regulatory Guide 4.16, Section 6.1, LTR-EHS-21-13, "2020 Annual Assessment of Public Dose due to Liquid and Gaseous Effluents" is attached.

Sincerely, JIii~

Jeff Ferguson Manager, Environment, Health and Safety

Attachment:

LTR-EHS-21-13, "2020 Annual Assessment of Public Dose due to Liquid and Gaseous Effluents"

Westinghouse NonProprietary Class 3 Page 1 of 3 Westinghouse Electric Company Nuclear Fuel Columbia Fuel Site 5801 Bluff Rd Hopkins, South Carolina 29061 USA To: Cynthia Teague, Diana Joyner Date: February 8, 2021 cc: Jeff Ferguson, Elise Malek, Patrick Donnelly, Nancy Parr, Anna Miller From: David Wagoner Your ref:

Ext: 1919 Our ref: LTR-EHS-21-13 Fax: 803.695.4158

Subject:

2020 Annual Assessment of Public Dose due to Liquid and Gaseous Effluents Effluents released from plant operations are monitored to determine the quantities of radionuclides discharged into the environment. The cumulative radioactivity released is summarized semi-annually and annually and input into models developed by the NRC and EPA to estimate the potential dose to the public.

The whole body and organ dose via the following pathways is determined in this assessment:

Dose due to Gaseous Effluents by Direct Inhalation The whole body dose was estimated using EPAs COMPLY Code at level 2 complexity.

The organ dose was estimated by calculating the X/Q factor using the results of the COMPLY analysis for stack #1212 (S1030A), the measured release quantity, and the dose conversion factors from Federal Guidance Report No 11, Limiting Values of Radionuclide Intake and Air concentration Factors for Inhalation, Submersion, and Ingestion (FGR 11).

Dose due to Liquid Effluents by Ingestion of Potable Water Estimated using equations and recommended values in Regulatory Guide 1.109, Doses from Liquid Effluent Pathways (RG 1.109). Dose conversion factors are referenced from FGR 11.

Dose due to Liquid Effluents by Ingestion of Fish Estimated using equations and recommended values in RG 1.109. Dose conversion factors are referenced from FGR 11.

Dose due to Liquid Effluents by Irradiation from Shoreline Deposition Estimated using equations and recommended values in RG 1.109. Dose conversion factors are referenced from Federal Guidance report No 12, External Exposure to Radionuclides in Air, Water, and Soil.

Bounding dose assessments for direct inhalation and for ingestion are performed using conservative assumptions to determine the maximum potential dose to a hypothetical individual member of the public. The inhalation dose is determined for the hypothetical individual standing at the nearest site

© 2021 Westinghouse Electric Company LLC All Rights Reserved

Westinghouse NonProprietary Class 3 Page 2 of 3 Our ref: LTR-EHS-21-13 February 8, 2021 boundary (595 meters) for twelve months. The ingestion dose from liquid effluent and external dose from sediment deposition is determined at the point at which the liquid effluent leaves the diffuser in the Congaree River.

The release rates for gaseous effluent are determined by gross alpha measurements performed on daily air samples, one per stack for 47 stacks (Attachment 1). The release rates for liquid effluent are determined by isotopic analysis of composite liquid effluent samples taken monthly (Attachment 3).

Based on these results, the following quantities were released in calendar year 2020:

436.2 µCi of Uranium in gaseous effluent 3,769 µCi of Uranium in liquid effluent 5,801 µCi of Technetium in liquid effluent Using these results and the methods previously mentioned the whole body dose, dose to the bone, and dose to the lung were determined for a hypothetical individual present at the nearest site boundary. Table 1 provides a summary of the results for each pathway. The gaseous and liquid effluents released during 2020 resulted in a potential whole body dose of 0.16 mrem, 0.007 mrem to the bone, and 1.54 mrem to the lung for an individual present at the nearest site boundary. The estimated whole body dose is well below the 25 mrem annual dose limit and the 1 mrem ALARA goal for a member of the public.

Table 1. 2020 Annual Dose to the Public from Liquid and Gaseous Effluents Whole Body Dose Organ Dose - Bone Organ Dose - Lung (mrem) (mrem) (mrem)

Gaseous Effluents Direct inhalation* 0.16 5.83E-03 1.54 Liquid Effluents Potable Water 9.06E-05 1.32E-03 -

Aquatic Food (Fish) 5.48E-06 7.62E-05 -

Shoreline Deposition 3.43E-09 - -

Total (mrem) 0.16 7.23E-03 1.54

  • Assumes 80 % residence time There were no changes in source material and no release points were added during 2020. One release point (location #1228 - Chem lab exhaust #3) was re-routed to the primary ventilation system servicing the chemical lab (location #1220 - chem lab filtered exh). Since location #1220 is continuously monitored, sample location #1228 was removed from service in the second half of 2020. Two release points were modified; the stack height was increased from 12m to 14m on the line

Westinghouse NonProprietary Class 3 Page 3 of 3 Our ref: LTR-EHS-21-13 February 8, 2021 4 calciner combustion gas stack (location #1225) and the stack height was increased from 16m to 17m on the chemistry lab exhaust #2 stack (location #1227). There were no impacts to the sampling systems due to these stack modifications. The attachments below illustrate the method used to calculate each result listed in Table 1. : 2020 Gaseous Effluent Discharges : Lung/Bone Organ Dose due to Gaseous Effluent : 2020 Liquid Effluent Discharges : Whole Body Dose from Liquid Effluent Pathways - Potable Water : Dose to the Bone Surface from Liquid Effluent Pathways - Potable Water : Whole Body Dose from Liquid Effluent Pathways - Aquatic Foods : Dose to the Bone Surface from Liquid Effluent Pathways - Aquatic Foods : Whole Body Dose from Liquid Effluent Pathways - Shoreline Deposits : 2020 Isotopic Fractions 0: Comply Results David Wagoner, CHP Review by: Anna Miller Radiation Safety Engineer Manager, RSO EH&S Operations EH&S Operations

Attachment 1 2020 Gaseous Effluent Discharges Sampling Location Stack Height Gross Alpha Concentration* 1st Half (JanJun) 2nd Half (JulyDec) Total uCi Release Rate (Ci/s)

Station Description (m) (uCi/mL) uCi Uranium Released Released U234 U235 U238 1207 MET LAB EXHAUST 10 2.61E13 1.67 2.90 4.57 1.24E13 4.75E15 1.66E14 1239 MAINT WELD EX 11 1.77E13 2.47 2.78 5.25 1.42E13 5.46E15 1.91E14 1243 AC8 11 8.22E14 4.73 5.03 9.76 2.64E13 1.02E14 3.55E14 1222 CALC COMB GAS LN 1 12 2.56E13 0.52 0.80 1.32 3.57E14 1.37E15 4.81E15 1223 CALC COMB GAS LN 2 12 2.35E13 0.41 0.81 1.22 3.30E14 1.27E15 4.44E15 1224 CALC COMB GAS LN 3 12 1.40E13 0.36 0.36 0.72 1.95E14 7.49E16 2.62E15 1226 CALC COMB GAS LN 5 12 1.86E13 0.52 0.44 0.96 2.60E14 9.98E16 3.49E15 1228 CHEM LAB EX #3 12 6.65E14 0.39 0.00 0.39 1.05E14 4.06E16 1.42E15 1237 ABF HOOD TORIT EX 12 9.10E14 1.90 2.16 4.06 1.10E13 4.22E15 1.48E14 1241 PELLET LINE 6 12 8.24E14 3.52 3.68 7.20 1.95E13 7.49E15 2.62E14 1247 HOT OIL RM EX 12 2.37E13 9.11 19.96 29.07 7.86E13 3.02E14 1.06E13 1201 FURNACE EX LINE 1 13 8.29E14 3.52 3.72 7.24 1.96E13 7.53E15 2.64E14 1202 FURNACE EX LINE 2 13 8.09E14 3.49 3.58 7.07 1.91E13 7.35E15 2.57E14 1203 FURNACE EX LINE 3 13 1.14E13 4.19 5.81 10.00 2.70E13 1.04E14 3.64E14 1204 FURNACE EX LINE 4 13 8.00E14 3.48 3.51 6.99 1.89E13 7.27E15 2.54E14 1205 FURNACE EX LINE 5 13 8.09E14 3.48 3.59 7.07 1.91E13 7.35E15 2.57E14 1206 NEW DECON ROOM 13 9.11E14 2.35 2.35 4.70 1.27E13 4.89E15 1.71E14 1208 INCINERATOR EX 13 5.74E13 8.13 26.08 34.21 9.25E13 3.56E14 1.25E13 1209 SUPPL INCIN EX 13 1.44E13 1.76 2.50 4.26 1.15E13 4.43E15 1.55E14 1217 CONV ENCL EX 4C 13 1.43E13 9.83 7.66 17.49 4.73E13 1.82E14 6.37E14 1218 CONV ENCL EX 4D 13 2.02E13 0.00 0.00 0.00 0.00E+00 0.00E+00 0.00E+00 1219 CONV EMERG EX 4E 13 2.84E13 0.62 1.03 1.65 4.46E14 1.72E15 6.01E15 1221 DECON ROOM EX 13 4.14E13 7.19 11.28 18.47 4.99E13 1.92E14 6.72E14 1230 DEV LAB EX #1 13 2.17E13 2.32 4.14 6.46 1.75E13 6.72E15 2.35E14 1231 DEV LAB EX #2 13 3.02E13 3.29 5.68 8.97 2.42E13 9.33E15 3.27E14 1232 PELLET COMBINED EX 13 8.48E14 6.09 6.49 12.58 3.40E13 1.31E14 4.58E14 1225 CALC COMB GAS LN 4 14 1.09E13 0.25 0.31 0.56 1.51E14 5.82E16 2.04E15 1229 HP LAB EX 15 8.90E14 0.80 0.83 1.63 4.41E14 1.70E15 5.93E15 1236 MAP COMBINED 15 2.78E13 0.00 0.00 0.00 0.00E+00 0.00E+00 0.00E+00 1240 AC3 15 8.28E14 4.90 4.93 9.83 2.66E13 1.02E14 3.58E14 1246 AC4 15 9.54E14 4.98 6.68 11.66 3.15E13 1.21E14 4.24E14 1251 WATERGLASS SCR S1190 15 2.02E13 5.63 9.38 15.01 4.06E13 1.56E14 5.46E14 1210 CONV 1A EX 16 2.73E13 6.73 29.10 35.83 9.69E13 3.73E14 1.30E13 1211 CONV 1B EX 16 1.66E13 0.00 0.00 0.00 0.00E+00 0.00E+00 0.00E+00 1212 S1030 A 16 1.59E13 20.21 15.66 35.87 9.70E13 3.73E14 1.31E13 1213 S1030 B 16 2.83E13 1.16 2.04 3.20 8.65E14 3.33E15 1.16E14 1233 SOLVENT EXT N EX 16 8.26E14 3.63 3.79 7.42 2.01E13 7.72E15 2.70E14 1234 SOLVENT EXT S EX 16 2.40E13 1.56 2.04 3.60 9.73E14 3.74E15 1.31E14 1220 CHEM LAB FILT EX 17 9.57E14 7.44 9.28 16.72 4.52E13 1.74E14 6.09E14 1227 CHEM LAB EX #2 17 7.27E13 5.88 7.46 13.34 3.61E13 1.39E14 4.86E14 1242 AC5 17 9.18E14 4.78 6.13 10.91 2.95E13 1.13E14 3.97E14 1244 AMMON FUME SCR 1008A 17 1.15E13 2.61 4.21 6.82 1.84E13 7.09E15 2.48E14 1245 AMMON FUME SCR 1008B 17 1.90E13 0.00 0.00 0.00 0.00E+00 0.00E+00 0.00E+00 1238 IFBA EXHAUST 18 8.42E14 6.14 6.36 12.50 3.38E13 1.30E14 4.55E14 1248 ERBIA FURNACE EX 18 8.90E14 12.52 10.33 22.85 6.18E13 2.38E14 8.32E14 1249 ERBIA SCRUBBER EX 18 8.18E14 5.48 5.67 11.15 3.01E13 1.16E14 4.06E14 1250 ERBIA CHANGE ROOM 18 9.37E14 2.79 2.81 5.60 1.51E13 5.82E15 2.04E14 Total 182.83 253.35 436.18 1.18E11 4.54E13 1.59E12

  • Concentration LLD is 8E14 uCi/mL O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\PES_gaseous effluent 2020.xlsx

Attachment 2 Lung/Bone Organ Dose due to Gaseous Effluents 1st half (Jan-Jun) 2nd half (Jul-Dec) Total EPA STACK IDENTIFICATION uCi Uranium uCi Uranium uCi released Comply Run Results S-1030A 20.21 15.66 35.87 Dose (mrem/yr) 1.90E-02 use highest release to calculate X/Q used by COMPLY Stack height (m) 16 U-234 U-235 U-238 Release Rate (Ci/s)

Dose from comply 0.01900 mrem 9.70E-13 3.73E-14 1.31E-13 release quantity 35.87 uCi 3.59E-05 Ci App E table E-5 8000.00 m3/yr Effective Dose conversion EPA FGR 11 p150-151 U-234 3.58E-05 Sv/Bq 85.25%

U-235 3.32E-05 Sv/Bq 3.28%

U-238 3.20E-05 Sv/Bq 11.48%

weighted dose conversion 3.53E-05 Sv/Bq conversion factor 3700.00 mrem/pCi= factor* Sv/Bq weighted dose conversion 0.1305 mrem/pCi equations Dose (mrem) = R(a)*3.17e4*Q*(X/Q)*effective Dose conversion see RG1.109-25 Dose (mrem)/(R(a)*3.17e4*Q*effective Dose conversion)=(X/Q) 1.60E-05 X/Q Estimate Lung Dose using X/Q and semi-annual releases for 2020 Estimate Bone Dose using X/Q and semi-annual releases for 2020 App E table E-5 Lung Organ Dose conversion EPA FGR 11 p150-151 U-234 2.98E-04 Sv/Bq 85.25% 1.13E-06 Sv/Bq U-235 2.76E-04 Sv/Bq 3.28% 1.05E-06 Sv/Bq U-238 2.66E-04 Sv/Bq 11.48% 1.01E-06 Sv/Bq weighted dose conversion 2.94E-04 Sv/Bq 1.11E-06 Sv/Bq conversion factor 3700.00 mrem/pCi= factor* Sv/Bq 3700.00 mrem/pCi= factor* Sv/Bq weighted dose conversion 1.0864 mrem/pCi 4.12E-03 mrem/pCi release quantity 436.18 uCi 436.18 uCi 4.36E-04 Ci 4.36E-04 Ci Lung

  • 1.54 mrem Bone
  • 5.83E-03 mrem
  • assume 80% residence *assume 80% residence O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\PES_gaseous effluent 2020.xlsx

2020 Attachment 3 - 2020 LIQUID EFFLUENT RADIOACTIVITY DISCHARGES Tc-99 Isotopic Uranium Total uCi/month Released Measurement Uncertainty / Error Uncertainty / Error Liquid Effluent Discharges Measured Sum U & Tc-Measured Concentrations (based on monthly GEL discharge samples)

Concentrations 99 Total U & Tc-Actual Actual U234 U235 U238 Total U Tc-99 U234 U235 U238 Tc-99 U234 U-235 U-238 Tc-99 Month 99 U234 U-235 U-238 Tc-99 kgal/month gal/month pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L (uCi) (uCi) (uCi) (uCi) pCi/L January 3667.702 3,667,702 20.2 1.15 3.34 24.7 0.00 24.7 280.4 16.0 46.4 0.0 1.7 0.5 0.7 25.4 23.6 6.5 9.7 352.6 February 3511.279 3,511,279 24.2 0.888 4.61 29.7 6.89 36.6 321.6 11.8 61.3 91.6 1.9 0.4 0.8 20.6 25.1 5.5 11.0 273.8 March 3273.403 3,273,403 21.3 0.935 4.01 26.2 23.5 49.7 263.9 11.6 49.7 291.2 1.8 0.4 0.8 22.6 22.1 5.3 9.6 280.0 April 2800.576 2,800,576 23.9 0.953 4.10 29.0 71.3 100.3 253.3 10.1 43.5 755.8 1.2 0.3 0.5 3.8 12.2 2.7 5.0 39.9 May 2999.495 2,999,495 22.5 1.05 3.59 27.1 63.2 90.3 255.4 11.9 40.8 717.5 1.6 0.4 0.6 5.0 18.3 4.5 7.4 56.3 June 3050.455 3,050,455 26.7 1.31 4.82 32.8 93.5 126.3 308.3 15.1 55.7 1079.5 1.8 0.4 0.8 4.2 20.3 5.1 8.7 48.3 July 2449.251 2,449,251 28.9 1.55 4.82 35.3 81.6 116.9 267.9 14.4 44.7 756.5 1.5 0.4 0.6 3.7 13.6 3.6 5.6 34.2 August 3986.655 3,986,655 13.8 0.241 2.94 17.0 49.3 66.3 208.2 3.6 44.4 743.9 1.5 0.3 0.7 3.5 21.9 3.8 10.4 53.0 September 2672.651 2,672,651 19.5 1.03 3.27 23.8 40.4 64.2 197.3 10.4 33.1 408.7 1.6 0.4 0.7 3.9 15.9 4.3 6.6 39.5 October 2678.814 2,678,814 21.4 1.03 3.73 26.2 29.8 56.0 217.0 10.4 37.8 302.2 1.8 0.5 0.8 3.0 18.6 4.7 7.8 30.7 November 2746.831 2,746,831 27.9 1.28 4.32 33.5 27.7 61.2 290.1 13.3 44.9 288.0 2.2 0.5 0.9 3.0 22.9 5.6 9.1 31.0 December 2969.596 2,969,596 19.7 1.30 3.48 24.5 32.6 57.1 221.4 14.6 39.1 366.4 1.6 0.5 0.7 3.7 18.2 5.3 7.7 41.3 Total 36806.708 36,806,708 3084.9 143.3 541.2 5801.2 233 57 99 1280 Liters (L) 1.39E+08 3769.4 Milliliters (ml) 1.39E+11 uCi Uranium 9570.6 uCi Uranium & Tc-99 LIQUID DISCHARGES Quantity Average Concentration Radionuclide LLD (uCi/ml) Released Error Released (uCi/ml)

(uCi)

U234 6.00E-10 3084.9 +/- 233 2.21E-08 U235 6.00E-10 143.3 +/- 57 1.03E-09 U238 6.00E-10 541.2 +/- 99 3.88E-09 Total U 3769.4 2.71E-08 Tc-99 6.00E-10 5801.2 +/- 1280 4.16E-08 Total 9570.6 6.87E-08 O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 4 Whole Body Dose from Liquid Effluent Pathways - Potable Water Whole Body-Ingestion 5

730 liters Usage by adult/yr U 10CFR20 7.3 x 10 (ml) which is the annual water intake of "Reference Man."

31293 mixing - dilution Dilution at difuser M Congaree Flow 9388 cubic feet/sec see Nureg-1118 Environmental Assessment for renewam SNM-1107 May 1985 0.3 cubic ft/sec Average discharge F Effluent Flow 3.00E-01 cubic feet/sec effective bone effective bone 2.83E-04 U-234 mRem/pCi D EPA Limiting Values of Radioanuclide Intake Sv/Bq Sv/Bq mRem/pCi mRem/pCi 2.66E-04 U-235 mRem/pCi D FRG no 11 1988 U-234 7.66E-08 1.13E-06 2.83E-04 4.18E-03 2.55E-04 U-238 mRem/pCi D Exposure-to-dose conversion factors for ingestion U-235 7.19E-08 1.05E-06 2.66E-04 3.88E-03 1.46E-06 Tc-99 mRem/pCi D U-238 6.88E-08 1.01E-06 2.55E-04 3.74E-03 Tc-99 3.95E-10 6.04E-11 1.46E-06 2.23E-07 12 hrs transit time t-p reg guide 1.109 table E-15 3.23557E-10 U-234 decay const 1.12404E-13 U-235 decay const Nuclide T(1/2) yr T(1/2) hr 1.77058E-14 U-238 decay const URANIUM234 2.45E+05 2.14E+09 3.24E-10 3.71407E-10 Tc-99 decay const URANIUM235 7.04E+08 6.17E+12 1.12E-13 for comaprison only URANIUM238 4.47E+09 3.91E+13 1.77E-14 0.9999999961 U-234 exp(-t-p) TC-99 2.13E+05 1.87E+09 3.71E-10 Part 20 table 2 1.0000000000 U-235 exp(-t-p) Dose Conversion soluble forms 1.0000000000 U-238 exp(-t-p) uCi/ml milliters uCi pCi mRem mRem/pCi 0.9999999955 Tc-99 exp(-t-p) U-234 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 U-235 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 Activity Released U-238 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 Tc-99 6.00E-05 7.30E+05 4.38E+01 4.38E+07 50 1.14E-06 3.085E-03 U-234 release fraction Ci ICRP 69 Comparison 1.433E-04 U-235 release fraction Ci 5.412E-04 U-238 release fraction Ci Sv/Bq Rem/Bq mRem/pCi 5.801E-03 Tc-99 release fraction Ci adult 5.00E-08 0.005 1.85E-04 check U sum 0.00377 infant 3.70E-07 0.037 1.37E-03 bone-adult 7.90E-07 0.079 2.92E-03 8.74E-07 U-234 release fraction *dose factor*exp(-*tp) 3.81E-08 U-235 release fraction *dose factor*exp(-*tp) 1.38E-07 U-238 release fraction *dose factor*exp(-*tp) 8.48E-09 Tc-99 release fraction *dose factor*exp(-*tp) 1.06E-06 all nuclides sum of nuclides 85.53473 usage 1100*(usage*dilution)/flow 9.06E-05 mRem see regulatory guide 1.109 page 1.109-2 and 1.109-3 for formula and definition of terms.

O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 5 Dose to the Bone Surface from Liquid Effluent Pathways - Potable Water Bone Surface-Ingestion 5

730 liters Usage by adult/yr U 10CFR20 7.3 x 10 (ml) which is the annual water intake of "Reference Man."

31293 mixing - dilution Dilution at difuser M Congaree Flow 9388 cubic feet/sec see Nureg-1118 Environmental Assessment for renewam SNM-1107 May 1985 0.3 cubic ft/sec Average discharge F Effluent Flow 3.00E-01 cubic feet/sec effective bone effective bone 4.18E-03 U-234 mRem/pCi D-bone EPA Limiting Values of Radioanuclide Intake Sv/Bq Sv/Bq mRem/pCi mRem/pCi 3.88E-03 U-235 mRem/pCi D-bone FRG no 11 1988 U-234 7.66E-08 1.13E-06 2.83E-04 4.18E-03 3.74E-03 U-238 mRem/pCi D-bone Exposure-to-dose conversion factors for ingestion U-235 7.19E-08 1.05E-06 2.66E-04 3.88E-03 2.23E-07 Tc-99 mRem/pCi D-bone U-238 6.88E-08 1.01E-06 2.55E-04 3.74E-03 Tc-99 3.95E-10 6.04E-11 1.46E-06 2.23E-07 12 hrs transit time t-p reg guide 1table E-15 3.23557E-10 U-234 decay const 1.12404E-13 U-235 decay const Nuclide T(1/2) yr T(1/2) hr 1.77058E-14 U-238 decay const URANIUM234 2.45E+05 2.14E+09 3.24E-10 Part 20 table 2 3.71407E-10 Tc-99 decay const URANIUM235 7.04E+08 6.17E+12 1.12E-13 Dose Conversion soluble forms URANIUM238 4.47E+09 3.91E+13 1.77E-14 0.9999999961 U-234 exp(-t-p) TC-99 2.13E+05 1.87E+09 3.71E-10 uCi/ml milliters uCi pCi mRem mRem/pCi 1.0000000000 U-235 exp(-t-p) U-234 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 1.0000000000 U-238 exp(-t-p) U-235 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 0.9999999955 Tc-99 exp(-t-p) U-238 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 Tc-99 6.00E-05 7.30E+05 4.38E+01 4.38E+07 50 1.14E-06 Activity Released ICRP 69 Comparison 3.085E-03 U-234 release fraction Ci Sv/Bq Rem/Bq mRem/pCi 1.433E-04 U-235 release fraction Ci 5.412E-04 U-238 release fraction Ci adult 5.00E-08 0.005 1.85E-04 5.801E-03 Tc-99 release fraction Ci infant 3.70E-07 0.037 1.37E-03 bone-adult 7.90E-07 0.079 2.92E-03 check U sum 0.00377 1.29E-05 U-234 release fraction *dose factor*exp(-*tp) 5.57E-07 U-235 release fraction *dose factor*exp(-*tp) 2.02E-06 U-238 release fraction *dose factor*exp(-*tp) 1.30E-09 Tc-99 release fraction *dose factor*exp(-*tp) 1.55E-05 all nuclides sum of nuclides 85.53473 usage 1100*(usage*dilution)/flow 1.32E-03 mRem see regulatory guide 1.109 page 1.109-2 and 1.109-3 for formula and definition of terms.

O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 6 Whole Body Dose from Liquid Effluent Pathways - Aquatic Foods Whole Body 21 Kg Usage by adult/yr U see regulatory guide 1.109 page 1.109-40 table E-5, Recommended Values for U(ap) 31293 mixing - dilution Dilution at difuser M Congaree Flow 9388 cubic feet/sec see Nureg-1118 Environmental Assessment for renewam SNM-1107 May 1985 0.3 cubic ft/sec Average discharge F Effluent Flow 3.00E-01 cubic feet/sec effective bone effective bone 2.83E-04 U-234 mRem/pCi D EPA Limiting Values of Radioanuclide Intake Sv/Bq Sv/Bq mRem/pCi mRem/pCi 2.66E-04 U-235 mRem/pCi D FRG no 11 1988 U-234 7.66E-08 1.13E-06 2.83E-04 4.18E-03 2.55E-04 U-238 mRem/pCi D Exposure-to-dose conversion factors for ingestion U-235 7.19E-08 1.05E-06 2.66E-04 3.88E-03 1.46E-06 Tc-99 mRem/pCi D U-238 6.88E-08 1.01E-06 2.55E-04 3.74E-03 Tc-99 3.95E-10 6.04E-11 1.46E-06 2.23E-07 24 hrs transit time t-p reg guide 1table E-15 3.23557E-10 U-234 decay const 1.12404E-13 U-235 decay const Nuclide T(1/2) yr T(1/2) hr 1.77058E-14 U-238 decay const URANIUM234 2.45E+05 2.14E+09 3.24E-10 for comaprison only 3.71407E-10 Tc-99 decay const URANIUM235 7.04E+08 6.17E+12 1.12E-13 URANIUM238 4.47E+09 3.91E+13 1.77E-14 Part 20 table 2 soluble forms 0.99999999223 U-234 exp(-t-p) TC-99 2.13E+05 1.87E+09 3.71E-10 Dose Conversion 1.00000000000 U-235 exp(-t-p) uCi/ml milliters uCi pCi mRem mRem/pCi 1.00000000000 U-238 exp(-t-p) U-234 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 0.99999999109 Tc-99 exp(-t-p) U-235 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 U-238 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 Activity Released Tc-99 6.00E-05 7.30E+05 4.38E+01 4.38E+07 50 1.14E-06 ICRP 69 Comparison 3.085E-03 U-234 release fraction Ci 1.433E-04 U-235 release fraction Ci Sv/Bq Rem/Bq mRem/pCi 5.412E-04 U-238 release fraction Ci 5.801E-03 Tc-99 release fraction Ci adult 5.00E-08 0.005 1.85E-04 infant 3.70E-07 0.037 1.37E-03 check U sum 0.00377 bone-adult 7.90E-07 0.079 2.92E-03 bioaccumulation factor BNWL-2075 1.75E-06 U-234 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 UC-11 7.62E-08 U-235 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 Methodology for Calculation of Radiation Doses 2.76E-07 U-238 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 in the Environs from Nuclear Fuel 1.27E-07 Tc-99 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 15 Cycle Facilities 2.23E-06 all nuclides sum of nuclides 2.46059 usage 1100*(usage*dilution)/flow 5.48E-06 mRem see regulatory guide 1.109 page 1.109-2 and 1.109-3 for formula and definition of terms.

O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 7 Dose to the Bone Surface from Liquid Effluent Pathways - Aquatic Foods Bone Surface 21 Kg Usage by adult/yr U see regulatory guide 1.109 page 1.109-40 table E-5, Recommended Values for U(ap) 31293 mixing - dilution Dilution at difuser M Congaree Flow 9388 cubic feet/sec see Nureg-1118 Environmental Assessment for renewam SNM-1107 May 1985 0.3 cubic ft/sec Average discharge F Effluent Flow 3.00E-01 cubic feet/sec effective bone effective bone 4.18E-03 U-234 mRem/pCi D EPA Limiting Values of Radioanuclide Intake Sv/Bq Sv/Bq mRem/pCi mRem/pCi 3.88E-03 U-235 mRem/pCi D FRG no 11 1988 U-234 7.66E-08 1.13E-06 2.83E-04 4.18E-03 3.74E-03 U-238 mRem/pCi D Exposure-to-dose conversion factors for ingestion U-235 7.19E-08 1.05E-06 2.66E-04 3.88E-03 2.23E-07 Tc-99 mRem/pCi D U-238 6.88E-08 1.01E-06 2.55E-04 3.74E-03 Tc-99 3.95E-10 6.04E-11 1.46E-06 2.23E-07 24 hrs transit time t-p reg guide 1.109 table E-15 3.23557E-10 U-234 decay const 1.12404E-13 U-235 decay const Nuclide T(1/2) yr T(1/2) hr for comaprison only 1.77058E-14 U-238 decay const URANIUM234 2.45E+05 2.14E+09 3.24E-10 3.71407E-10 Tc-99 decay const URANIUM235 7.04E+08 6.17E+12 1.12E-13 Part 20 table 2 soluble forms URANIUM238 4.47E+09 3.91E+13 1.77E-14 Dose Conversion 0.99999999223 U-234 exp(-t-p) TC-99 2.13E+05 1.87E+09 3.71E-10 uCi/ml milliters uCi pCi mRem mRem/pCi 1.00000000000 U-235 exp(-t-p) U-234 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 1.00000000000 U-238 exp(-t-p) U-235 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 0.99999999109 Tc-99 exp(-t-p) U-238 3.00E-07 7.30E+05 2.19E-01 2.19E+05 50 2.28E-04 Tc-99 6.00E-05 7.30E+05 4.38E+01 4.38E+07 50 1.14E-06 Activity Released ICRP 69 Comparison 3.085E-03 U-234 release fraCi Sv/Bq Rem/Bq mRem/pCi 1.433E-04 U-235 release fraCi 5.412E-04 U-238 release fraCi adult 5.00E-08 0.005 1.85E-04 5.801E-03 Tc-99 release fra Ci infant 3.70E-07 0.037 1.37E-03 bone-adult 7.90E-07 0.079 2.92E-03 check U sum 0.00377 bioaccumulation factor BNWL-2075 2.58E-05 U-234 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 UC-11 1.11E-06 U-235 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 Methodology for Calculation of Radiation Doses 4.04E-06 U-238 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 2 in the Environs from Nuclear Fuel 1.94E-08 Tc-99 release fraction *bioaccumulation factor*dose factor*exp(-*tp) 15 Cycle Facilities 3.10E-05 all nuclides sum of nuclides 2.46059 usage 1100*(usage*dilution)/flow 7.62E-05 mRem see regulatory guide 1.109 page 1.109-2 and 1.109-3 for formula and definition of terms.

O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 8 Whole Body Dose from Liquid Effluent Pathways - Shoreline Deposits Whole Body 12 hr Usage by adult/yr U see regulatory guide 1.109 page 1.109-40 table E-5, Recommended Values for U(ap) 31293 mixing - dilution Dilution at difuser M Congaree Flow 9388 cubic feet/sec see Nureg-1118 Environmental Assessment for renewam SNM-1107 May 1985 0.3 cubic ft/sec Average discharge F Effluent Flow 3.00E-01 cubic feet/sec Sv/s:Bq/m^2 mrem/hr:pCi/m^2 9.86E-12 U-234 mRem*m^2/pCi*hr D U-234 7.40E-19 9.86E-12 EPA FRG 12 Dose Coeff for exposure to contaminated ground surface 1.97E-09 U-235 mRem*m^2/pCi*hr D U-235 1.48E-16 1.97E-09 7.34E-12 U-238 mRem*m^2/pCi*hr D U-238 5.51E-19 7.34E-12 1.04E-12 Tc-99 mRem*m^2/pCi*hr D Tc-99 7.80E-20 1.04E-12 12 hrs transit time t-p see regulatory guide 1.109 page 1.109-69 table E-15, Recommended Values 131040 hrs xposure time of sedime t-b page 1.109-68 t-i 3.23557E-10 U-234 decay const Nuclide T(1/2) yr T(1/2) hr T(1/2) day 1.12404E-13 U-235 decay const URANIUM234 2.45E+05 2.14E+09 3.24E-10 8.90E+07 1.77058E-14 U-238 decay const URANIUM235 7.04E+08 6.17E+12 1.12E-13 2.56E+11 3.71407E-10 Tc-99 decay const URANIUM238 4.47E+09 3.91E+13 1.77E-14 1.63E+12 TC-99 2.13E+05 1.87E+09 3.71E-10 7.75E+07 0.0000423980 U-234 exp(-t-p)*[1-exp(-t-b)]

0.0000000147 U-235 exp(-t-p)*[1-exp(-t-b)]

0.0000000023 U-238 exp(-t-p)*[1-exp(-t-b)]

0.0000486679 Tc-99 exp(-t-p)*[1-exp(-t-b)]

Activity Released 3.085E-03 U-234 release fraction Ci 1.433E-04 U-235 release fraction Ci 5.412E-04 U-238 release fraction Ci 5.801E-03 Tc-99 release fraction Ci check U sum 0.00377 1.15E-10 U-234 release fraction *dose factor*exp(-t-p)*1-exp(-t-b)*t-i 1.07E-09 U-235 release fraction *dose factor*exp(-t-p)*1-exp(-t-b)*t-i 1.50E-11 U-238 release fraction *dose factor*exp(-t-p)*1-exp(-t-b)*t-i 2.27E-11 Tc-99 release fraction *dose factor*exp(-t-p)*1-exp(-t-b)*t-i 1.22E-09 all nuclides sum of nuclides 2.812101 usage 11000*(usage*dilution*shore width factor)/flow 3.43E-09 mRem see regulatory guide 1.109 page 1.109-2 and 1.109-3 for formula and definition of terms.

see regulatory guide 1.109 page 1.109-40 table A-2,Shore width O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 9 2020 Isotopic Fractions Based on the plant nominal enrichment for 2020 Nuclide Average Specific Activity Weighted  %

wt% Ci/g Activity Activity U-234 0.04 6.220E-03 2.388E-06 85.25 U-235 4.25 2.160E-06 9.180E-08 3.28 U-238 95.70 3.360E-07 3.216E-07 11.48 Total 100.0 2.802E-06 100.00 O:\Regulatory\EH&S Operations\Environment\Environment 2020\Annual\2020 Liquid Effluent.xlsx

Attachment 10 - Comply Results COMPLY: V1.7. 2/ 8/2021 8:45 40 CFR Part 61 National Emission Standards for Hazardous Air Pollutants REPORT ON COMPLIANCE WITH THE CLEAN AIR ACT LIMITS FOR RADIONUCLIDE EMISSIONS FROM THE COMPLY CODE V1.7.

Prepared by:

Westinghouse Electric Co.

Columbia Fuel Fabrication Facility 5801 Bluff Rd. Hopkins, SC 29061 David Wagoner 803.647.1919 Prepared for:

U.S. Environmental Protection Agency Office of Radiation and Indoor Air Washington, DC 20460

2020 SemiAnnual Dose to Public due to Gaseous Effluents

SCREENING LEVEL 2

DATA ENTERED:

RELEASE RATES FOR STACK 1.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.240E13 U235 Y 4.750E15 U238 Y 1.660E14 RELEASE RATES FOR STACK 2.

Release Rate Nuclide (curies/SECOND)

U234 Y 4.060E13 U235 Y 1.560E14 U238 Y 5.460E14 RELEASE RATES FOR STACK 3.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.210E12 U235 Y 4.670E14 U238 Y 1.640E13 RELEASE RATES FOR STACK 4.

Release Rate Nuclide (curies/SECOND)

U234 Y 3.980E12 U235 Y 1.530E13 U238 Y 5.360E13

RELEASE RATES FOR STACK 5.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.510E14 U235 Y 5.820E16 U238 Y 2.040E15 RELEASE RATES FOR STACK 6.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.030E12 U235 Y 3.970E14 U238 Y 1.390E13 RELEASE RATES FOR STACK 7.

Release Rate Nuclide (curies/SECOND)

U234 Y 2.320E12 U235 Y 8.940E14 U238 Y 3.130E13 RELEASE RATES FOR STACK 8.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.290E12 U235 Y 4.970E14 U238 Y 1.740E13 RELEASE RATES FOR STACK 9.

Release Rate Nuclide (curies/SECOND)

U234 Y 1.410E12 U235 Y 5.420E14 U238 Y 1.900E13

SITE DATA FOR STACK 1.

Release height 10 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 2.

Release height 11 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 3.

Release height 12 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 4.

Release height 13 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 5.

Release height 14 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 6.

Release height 15 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 7.

Release height 16 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 8.

Release height 17 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

SITE DATA FOR STACK 9.

Release height 18 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

Default mean wind speed used (2.0 m/sec).

NOTES:

Input parameters outside the "normal" range:

Building (width) is unusually WIDE.

Receptor is unusually FAR.

RESULTS:

Effective dose equivalent: 0.2 mrem/yr.

      • Comply at level 2.

This facility is in COMPLIANCE.

It may or may not be EXEMPT from reporting to the EPA.

You may contact your regional EPA office for more information.

                    • END OF COMPLIANCE REPORT **********

COMPLY: V1.7. 2/ 8/2021 9:33 40 CFR Part 61 National Emission Standards for Hazardous Air Pollutants REPORT ON COMPLIANCE WITH THE CLEAN AIR ACT LIMITS FOR RADIONUCLIDE EMISSIONS FROM THE COMPLY CODE V1.7.

Prepared by:

Westinghouse Electric Co.

Columbia Fuel Fabrication Facility 5801 Bluff Rd. Hopkins, SC 29061 David Wagoner 803.647.1919 Prepared for:

U.S. Environmental Protection Agency Office of Radiation and Indoor Air Washington, DC 20460

S1030A

SCREENING LEVEL 2

DATA ENTERED:

Release Rate Nuclide (curies/SECOND)

U234 Y 9.700E13 U235 Y 3.730E14 U238 Y 1.310E13 Release height 16 meters.

Building height 9 meters.

The source and receptor are not on the same building.

Distance from the source to the receptor is 595 meters.

Building width 137 meters.

Default mean wind speed used (2.0 m/sec).

NOTES:

Input parameters outside the "normal" range:

Building (width) is unusually WIDE.

Receptor is unusually FAR.

RESULTS:

Effective dose equivalent: 1.9E02 mrem/yr.

      • Comply at level 2.

This facility is in COMPLIANCE.

It may or may not be EXEMPT from reporting to the EPA.

You may contact your regional EPA office for more information.

                    • END OF COMPLIANCE REPORT **********
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