ML22245A094

Nuclear Fuel Services, Inc. (NFS) - Biannual Effluent Monitoring Report January to June 2022

ML22245A094
Person / Time
Site:	Erwin
Issue date:	08/22/2022
From:	Knowles T Nuclear Fuel Services
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
21G-22-0097, ACF-22-0195, GOV-01-55
Download: ML22245A094 (13)

Text

Nuclear Fuel Services, Inc. Certified Mail 21G-22-0097

Return Receipt Requested GOV-01-55 ACF-22-0195

August22,2022

Director Office of Nuclear Material Safety & Safeguards U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Reference:

Docket No.70-143; SNM License 124

Subject:

Biannual Effluent Monitoring Report January to June 2022

Dear Director:

In accordance with the requirements set forth in 1 O CFR Part 70.59, Nuclear Fuel Services, Inc. (NFS), submits the attached reports. Attachment 1 reports the Radioactivity in Effluent Liquid for the period January to June 2022. Attachment 2 reports the Radioactivity in Effluent Air for the period January to June 2022. Attachment 3 summarizes an evaluation of the dose and air activity concentrations for the maximally exposed offsite individual due to gaseous effluents during the period January to June 2022.

If you or your staff have any questions, require additionafinformation, or wish to discuss this, please contact me or Mr. R. Jason Faddis, Environmental Safety Unit Manager, at (423) 735-5438. Please reference our unique document identification number (21 G 0097) in any correspondence concerning this letter.

Sincerely,*

NUCLEAR FUEL SERVICES, INC.

j~/(~

Tim Knowles _.*

Safety & Safeguards Director CJB/las Attachments

1) Report of Radioactivity in Effluent Liquid for the Period January to June 2022

2) Report of Radioactivity in Effluent Air for the Period January to June 2022

3) Report of Gaseous Effluent Dose and Activity Concentrations for the Maximally Exposed Off-Site Individual for the Release Perioq January to June 2022

1205 Banner Hill Rd, Erwin, TN 37650 Page 1 of 13 p e O pl e s t r O n g t:' +1.423.743.9141 f: +1.423.743.0140 www.nuclearfuelservices.com VHI I V' 1. /NNO11ATJON DRl' 1 EN >

21G-22-0097 GOV-01-55 ACF-22-0195

Copy:

Mr. Joel Rivera-Ortiz Senior Fuel Facility Inspector U. S. Nuclear Regulatory Commission Region II 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257

Regional Administrator U. S. Nuclear Regulatory Commission Region II 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257

Mr. James Downs Senior Project Manager Division of Fuel Management Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Two White Flint North 11555 Rockville Pike Rockville, MD 20852-2738

Dr. Robert Williams Chief, Projects Branch 1 U. S. Nuclear Regulatory Commission Region II 245 Peachtree Center Ave., NE Suite 1200 Atlanta, GA 30303-1257

Mr. Larry Harris Senior Resident Inspector U. S. Nuclear Regulatory Commission

Page 2 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195

Attachment 1 To Letter Dated August 22, 2022

Report of Radioactivity in Effluent Liquid for the Period January to June 2022

(2 Pages to Follow)

Page 3 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195 Radioactivity in Effluent Liquid January 1, 2022 to June 30, 2022

Total Activity Error Quantity Quantity Fraction Volume Concentration Estimate LLD Released Released of 1 Location (I) (µCi/ml) (µCi/ml) (µCi/ml) (Ci) (g) ECV Banner Spring Down Pu-238 459,723,000 S.24E-12 l.21E-10 2.67E-10 2.41E-06 l.41E-07 2.62E-04 Pu-239/240 459,723,000 l.66E-11 l.31E-IO 2.73E-10 7.6SE-06 1.23E-04 8.32E-04 Tc-99 459,723,000 l.llE-08 2.53E-08 4.32E-08 S.12E-03 3.03E-Ol l.86E-04 Th-228 459,723,000 l.17E-l 1 l.37E-10 2.88E-10 S.39E-06 6.SSE-09 S.86E-05 Th-230 459,723,000 8.31E-ll l.83E-IO 3.30E-10 3.82E-OS 1.89E-03 8.31E-04 Th-232 459,723,000 O.OOE+OO 7.23E-ll l.78E-10 O.OOE+OO O.OOE+OO O.OOE+OO U-233/234 459,723,000 2.70E-10 2.69E-10 3.84E-10 l.24E-04 l.99E-02 8.99E-04 U-235/236 459,723,000 2.41E-ll 1.16E-IO 2.39E-10 1.llE-05 5.12E+OO 8.03E-05 U-238 459,723,000 5.44E-ll l.S7E-10 2.90E-10 2.SOE-05 7.47E+Ol 1.SIE-04 Total: 3.33E-03 Sewer Pu-238 19,708,000 2.46E-12 8.88E-11 l.SSE-10 4.SSE-08 2.84E-09 l.23E-OS Pu-239/240 19,708,000 l.47E-ll l.06E-IO 2.16E-10 2.90E-07 4.67E-06 7.36E-05 Tc-99 19,708,000 l.OIE-08 2.60E-08 4.44E-08 l.98E-04 l.l 7E-02 l.68E-05 Th-228 19,708,000 O.OOE+OO l.73E-10 4.2SE-10 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 19,708,000 l.49E-10 2.48E-10 4.29E-10 2.93E-06 l.45E-04 l.49E-04 Th-232 19,708,000 4.llE-11 l.59E-10 2.82E-10 8.llE-07 7.44E+OO l.37E-04 U-232 19,708,000 4.76E-12 l.28E-10 2.6SE-10 9.37E-08 4.38E-09 7.93E-06 U-233/234 19,708,000 l.22E-08 9.92E-10 l.68E-10 2.41E-04 3.86E-02 4.0SE-03 U-235/236 19,708,000 S.IOE-10 2.09E-10 l.03E-10 l.OIE-05 4.65E+OO l.70E-04 U-238 19,708,000 l.36E-09 3.22E-10 l.38E-10 2.68E-05 7.99E+Ol 4.53E-04 Total: S.lOE-03 West Ditch Pu-238 156,109,000 O.OOE+OO l.28E-10 3.21E-10 O.OOE+oO O.OOE+OO O.OOE+OO Pu-239/240 156,109,000 8.27E-12 l.27E-IO 2.77E-10 l.29E-06 2.0SE-05 4.14E-04 Tc-99 156,109,000 O.OOE+OO 3.06E-08 5.28E-08 O.OOE+OO O.OOE+OO O.OOE+OO Th-228 156,109,000 1.96E-ll l.59E-10 3.30E-10 3.05E-06 3.73E-09 9.78E-05 Th-230 156,109,000 l.97E-10 2.30E-10 3.48E-10 3.07E-05 1.52E-03 l.97E-03 Th-232 156,109,000 O.OOE+OO 9.77E-ll 2.31E-10 0.00E+OO O.OOE+OO O.OOE+OO U-233/234 156,109,000 l.47E-08 l.48E-09 3.SOE-10 2.30E-03 3.68E-01 4.90E-02 U-235/236 156,109,000 5.77E-10 3.45E-IO 2.71E-10 9.00E-05 4.17E+Ol l.92E-03 U-238 156,109,000 1.13E-09 4.20E-IO 2.4SE-10 l.77E-04 5.28E+02 3.78E-03 Total: S.72E-02 WWTF Am-241 3,730,543 2.l?E-11 l.OSE-10 l.90E-10 8.I IE-08 2.36E-08 l.09E-03 Cs-137 3,730,543 4.65E-10 l.21E-09 l.39E-09 l.74E-06 l.99E-08 4.6SE-04 Na-22 3,730,543 O.OOE+OO 7.68E-10 l.39E-09 O.OOE+OO O.OOE+OO O.OOE+OO Np-237 3,730,543 2.SOE-1 I 2.SSE-10 6.29E-10 1.04E-07 l.48E-04 l.40E-03 Pb-212 3,730,543 9.29E-IO 3.31E-09 2.84E-09 3.47E-06 2.SIE-12 4.64E-04 Pu-238 3,730,543 l.lSE-11 S.SOE-11 l.06E-10 4.39E-08 2.57E-09 5.89E-04

ECV: Effluent Concentralion Value from 10-CFR-2D, Appendix 8.

Nole: A value or *o* was substituled for negative analytical results:

Printed: 08/09/2022 NFS-EDMS Page I of2

Page 4 of 13 21G-22-0097 GOV-01-55 ACF-22-0195 Radioactivity in Effluent Liquid January 1, 2022 to June 30, 2022

Total Activity Error Quantity Quantity Fraction Volume Concentration Estimate LLD Released Released or 1 Locatio"n (I) (µCi/ml) _(pCi/ml) (µCi/ml) (Ci) (g) ECV WWTF.

Pu-239/240 3,730,543 3.09E-13 5.19E-II l.'16E-10 l.1SE-09 l.86E-08 I.SSE-OS Pu-241 3,730,S43 9.24E-10 9.47E-09 1.63E-08 3.4SE-06 3.3SE-08 9.24E-04 Ra-224 3,730,S43 1.64E-08 9.S4E-09 l.71E-08 6.12E-05 3.SSE-10 8.20E-02 Tc-99 3,730,S43 9.31E-10 7.ISE-08 I.25E-07 3.47E-06 2.06E-04 I.SSE-OS Th-228 3,730,S43 3.S6E-12 I.53E-10 3.38E-10 l.33E-08 I.62E-11 I.78E-05 Th-230 3,730,543 1.88E-10 2.0SE-10 3.lSE-10 7.00E-07 3.47E-OS I.88E-03 Th-231 3,730,543 O.OOE+OO 4.ISE-08 3.82E-08 O.OOE+OO O.OOE+OO O.OOE+OO Th-232 3,730,543 2.76E-11 1.07E-10 l.96E-10 1.03E-07 9.45E-Ol 9.20E-04 U-232 3,730,S43 O.OOE+oO I.OSE-10 2.48E-10 O.OOE+OO O.OOE+OO O.OOE+OO U-233/234 3,730,S43 9.SIE-09 8.62E-10 1.86E-10 3.SSE-05 S.69E-03 3.l?E-02 U-23S/236 3,730,543 4.41E-10 l.90E-10 1.16E-IO 1.6SE-06 7.62E-Ol 1.47E-03 U-238 3,730,S43 7.048-11 9.SOE-II 1.37E-IO 2.63E-07 7.84E-Ol 2.3SE-04 Total: l.23E-Ol

ECV: Effluent Concentration Value from 10-CFR-20,Appendix B.

Note: A value ot *o* was subslltt.ded for negaUve enalylfcal results.

Printed: 08/09/2022 NFS-EDMS Pa~e2of2

Page 5 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195

Attachment 2 To Letter Dated August 22, 2022

Report of Radioactivity in Effluent Air for the Period January to June 2022

(3 Pages to Follow)

Page 6 of 13 21G-22-0097 GOV-01-55 ACF-22-0195 Radioactivity in Effluent Air January 1, 2022 to June 30, 2022

Total Activity Error Quantity Quantity Fraction Volume Concentration Estimate LLD Released Released of 1 Location (m3) (µCi/ml) (µCi/ml) (µCi/ml) (Ci) (g) ECV Main Stack 416 1066.64 m 3/min 17.78 m3tsec Th-228 278,008,817 6.94E-l6 !.58E-l6 9.46E-l 7 I.93E-07 2.35E-10 3.47E-02 Th-230 278,008,817 6.94E-l6 l.58E-l6 9.46E-l7 l.93E-07 9.SSE-06 3.47E-02 Th-232 278,008,817 5.20E-l6 l.18E-16 7.IOE-17 l.45E-07 l.33E+OO l.30E-OI U-234 278,008,817 l.64E-13 3.72E-14 2.23E-14 4.55E-05 7.29E-03 3.27E+OO U-235 278,008,817 6.24E-15 l.42E-15 8.SlE-16 l.74E-06 8.03E-Ol l.04E-Ol U-238 278,008,817 l.73E-15 3.95E-16 2.37E-16 4.82E-07 1.44E+o0 2.89E-02 Total: 3.60E+o0

Stack 185 Bldg. 131 109.81 m 3/min 1.83 m 3/sec Pu-241 28,621,594 l.71E-16 8.78E-16 l.65E-15 4.89E-09 4.75E-ll 2.14E-04 Tc-99 28,621,594 5.53E-15 2.84E-l4 S.34E-14 l.SSE-07 9.36E-06 6.14E-06 U-234 28,621,594 O.OOE+OO 7.79E-15 2.IIE-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 28,621,594 O.OOE+OO 2.41E-16 6.52E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 2.20E-04 Stack 234 Bldg. 234 313.07 m 3/min 5.22 m 3/sec Am-241 83,217,178 9.95E-18 2.26E-17 4.79E-l7 8.28E-l0 2.41E-10 4.97E-04 Pu-238 83,217,178 l.22E-17 2.76E-17 5.86E-l7 1.0lE-09 5.92E-ll 6.0SE-04 Pu-239/240 83,217,178 4.31E-l 7 9.78E-17 2.08E-16 3.59E-09 5.77E-08 2.lSE-03 Pu-241 83,217,178 O.OOE+OO 3.93E-15 7.28E-15 O.OOE+OO 0.00E+OO O.OOE+OO Th-228 83,217,178 6.63E-18 1.50E-l 7 3.l9E-l7 5.52E-10 6.74E-13 3.32E-04 Th-230 83,217,178 8.29E-17 l.88E-16 3,99E-l6 6.90E-09 3.41E-07 4.14E-03 Th-232 83,217,178 l.OSE-16 2.38E-16 5.06E-16 8.74E-09 8.0lE-02 2.62E-02 U-234 83,217,178 2.27E-16 5.14E-16 l.09E-15 l.89E-08 3.02E-06 4.53E-03 U-238 83,217,178 6.63E-l 7 l.50E-16 3.19E-16 5.52E-09 l.65E-02 l.l lE-03 Total: 3.96E-02 Stack 327 Bldg. 330 988.79 m 3/min 16.48 m 3/sec Pu-241 257,710,188 1.83E-15 5.l 7E-16 7.87E-16 4.73E-07 4.59E-09 2.29E-03 Tc-99 257,710,188 5.93E-l4 l.67E-14 2.55E-14 l.53E-05 9.04E-04 6.S9E-05 U-234 257,710,188 9.33E-l4 1.16E-l4 9.llE-15 2.40E-OS 3.SSE-03 l.87E+OO U-235 257,710,188 2.88E-15 3.59E-16 2.82E-16 7.43E-07 3.44E-OI 4.SIE-02 Total: l.92E+00

Stack 421 Bldg. 100 31.77 m 3/min 0.53 m 3/sec Pu-241 8,280,925 2.48E-15 l.42E-15 2.28E-15 2.05E-08 1.99E-10 3.09E-03 Tc-99 8,280,925 8.00E-14 4.61E-14 7.39E-14 6.63E-07 3.92E-05 8.89E-05 U-234 8,280,925 9.04E-15 1.6IE-14 2.76E-14 7.49E-08 l.20E-05 1.SlE-01 U-235 8,280,925 2.SOE-16 4.97E-16 8.54E-16 2.32E-09 l.07E-03 4.66E-03 Total: l.89E-0l

Stack 424 Bldg. 100 33.05 m 3/min 0.55 m 3/sec Pu-241 8,613,048 8.55E-16 9.94E-16 !.66E-15 7.36E-09 7.ISE-11 l.07E-03 Tc-99 8,613,048 2.76E-14 3.21E-14 5.36E-14 2.38E-07 l.41E-05 3.07E-05

I ECV: Effluent ConcentraUon Value from 10-CFR-20, Appendix B. Fraction or ECV al lhe stack Is provided tor reference anly. Concentrallons el off-slle locallons are slgnlflcantly less then those reported here (at stack) due lo the atmospheric dispersion that ccc,u5 before the effiuent exils the site.

Nole: A value of *o~ was subslltuted for negellve enelytlcal results.

Printed: 08/09/2022 NFS-EDMS Pagel of3

Page 7 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195 Radioactivity in Effluent Air January 1, 2022 to June 30, 2022

Total Activity Error Quantity Quantity Fraction Volume Concentration Estimate LLD Released Released of 1 Location (m3) (µCi/ml) (µCi/ml) (µCi/ml) (Ci) (g) ECV Stack 424 Bldg. 100 33.05 m 3/min 0.55 m3tsec U-234 8,613,048 l,29E-15 9.23E-15 2.12E-14 l.llE-08 1.78E-06 2.SSE-02 U-235 8,613,048 3.99E-17 2.85E-16 6.54E-16 3.43E-10 1.59E-04 6.64E-04 Total:; 2.75E-02

Stack 573 Bldg 306-W 112.22 m 3/min 1.87 m 3/sec Pu-241 29,230,139 6.99E-17 7.91E-16 l.53E-15 2.04E-09 1.98E-11 8.74E-05 Tc-99 29,230,139 2.26E-15 2.56E-14 4.96E-14 6.61E-08 3.91E-06 2.SlE-06 U-234 29,230,139 O.OOE+OO 6.42E-15 l.98E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 29,230,139 O.OOE+OO l.99E-16 6.13E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 8.99E-05 Stack 600 Bldg. 110 312.08 m 3/min 5.20 m3tsec Pu-241 81,340,532 7.43E-16 5.61E-16 9.92E-16 6.0SE-08 5.87E-10 9.29E-04 Tc-99 81,340,532 2.40E-14 I.BIE-14 3.21E-14 1.96E-06 l.16E-04 2.67E-05 U-234 81,340,532 l.79E-14 7.89E-15 1.33E-14 1.45E-06 2.33E-04 3.58E-01 U-235 81,340,532 5.53E-16 2.44E-16 4.llE-16 4.SOE-08 2.0SE-02 9.22E-03 Total: 3.68E-01

Stack 615 Bldg. 306-W 48.95 m 3/min 0.82 m3tsec Pu-241 12,757,629 O.OOE+OO 8.54E-16 l.67E-15 O.OOE+OO O.OOE+OO O.OOE+OO Tc-99 12,757,629 O.OOE+OO 2.76E-14 5.39E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-234 12,757,629 O.OOE+OO 6.98E-15 2.13E-14 0.00E+OO O.OOE+OO O.OOE+OO U-235 12,757,629 O.OOE+OO 2.'16E-16 6.SSE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: O.OOE+OO Stack 646 Bldg. 110 36.50 m 3/min 0.61 m3tsec Pu-241 9,513,469 l.14E-16 8.68E-16 l.65E-15 l.09E-09 I.OSE-11 l.43E-04 Tc-99 9,513,469 3.69E-1S 2.SIE-14 5.34E-14 3.SIE-08 2.08E-06 4.IOE-06 U-234 9,513,469 O.OOE+OO 6.68E-15 2.llE-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 9,513,469 O.OOE+OO 2.07E-16 6.52E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 1.47E-04 Stack 701 Bldg. 307 123.71 m 3/min 2.06 m 3/sec Pu-241 32,244,850 O.OOE+OO 9.48E-16 l.89E-15 0.00E+OO 0.00E+OO O.OOE+OO Tc-99 32,244,850 O.OOE+OO 3.07E-14 6.llE-14 O,OOE+OO O.OOE+OO O.OOE+OO U-234 32,244,850 2.74E-15 9.46E-15 2.41E-14 8.SSE-08 1.42E-05 5.49E-02 U-235 32,244,850 8.49E-17 2.92E-16 7.45E-16 2.74E-09 l.27E-03 l.41E-03 Total: 5.63E-02 Stack 702 Bldg. 307 155.83 m 3/min 2.60 m3tsec Pu-241 40,615,524 4.72E-18 8.56E-16 1.67E-15 l.92E-10 1.86E-12 5.90E-06 Tc-99 40,615,524 l.53E-16 2.77E-14 5.39E-14 6.20E-09 3.67E-07 l.70E-07 U-234 40,615,524 3.21E-16 8.SSE-15 2.12E-14 l.30E-08 2.09E-06 6.42E-03

1 ECV: Effluenl concanlratlon Value from 1 O-CFR*20, Appendix B, Fret:tlon of ECV at lhe stack Is provided for reference only. Concentrations et off-site tocaUons are slgniflcanUy less than lhose reported here (al stack) due to the almospherto dispersion that occurs before lhe effluent exits the site.,

Nole: A value of -o~ was substituted ror negative analytical results, Printed: 08/09/2022 NFS-EDMS Page2of3

Page 8 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195 Radioactivity in Effluent Air January 1, 2022 to June 30, 2022

Total Activity Error Quantity Quantity Fraction Volume Concentration Estimate LLD Released Released of 1 Location (m*) (,11Ci/ml) (µCi/ml) (µCi/ml) (Ci) (g) ECV Stack 702 Bldg. 307 155.83 m 3/min 2.60 m 3/sec U-235 40,615,524 9.93E-18 2.65E-16 6.57E-16 4.0JE-10 1.87E-04 J.66E-04 Total: 6.59E-03 Stack 703 Exhaust Room Air 768.55 m 3/min 12.81 m3tsec Pu-241 200,314,824 O.OOE+OO 2.SOE-14 4.90E-14 O.OOE+OO O.OOE+OO 0.00E+OO Th-228 200,314,824 O.OOE+OO 7.00E-16 J.91E-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 200,314,824 O.OOE+OO 4.03E-16 1.IOE-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-232 200,314,824 O.OOE+OO 5.73E-16 l.56E-15 0.00E+OO 0.00E+OO O.OOE+OO U-234 200,314,824 O.OOE+OO 4.39E-15 l.20E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 200,314,824 O.OOE+OO 4.53E-16 1.24E-15 O.OOE+OO O.ODE+OO O.OOE+OO U-238 200,314,824 O.OOE+OO 5.52E-16 I.SJE-15 O.OOE+OO O.OOE+OO O.OOE+OO Total: 0.00E+00 Stack 773 Bldg. 440 158.46 m 3/min 2.64 m3tsec Pu-241 41,393,821 6.36E-15 3.44E-14 6.53E-14 2.63E-07 2.SSE-09 7.94E-03 Th-228 41,393,821 O.OOE+OO l.21E-15 3.63E-15 O.OOE+OD O.ODE+OO O.DOE+OO Th-230 41,393,821 O.OOE+OO l.56E-15 4.67E-15 O.OOE+OO O.OOE+OO O.OOE+oO Th-232 41,393,821 O.OOE+OO 1.04E-15 3.12E-15 O.OOE+OO O.DOE+OO O.OOE+OO U-234 41,393,821 O.OOE+OO 3.20E-15 9.61E-15 O.ODE+OO 0.0DE+OO O.OOE+OO U-235 41,393,821 O.OOE+OO 5.62E-16 l.69E-15 O.ODE+OO O.OOE+OO O.OOE+OO U-238 41,393,821 O.OOE+OO l.12E-15 3.38E-15 0.00E+OO O.ODE+OO O.OOE+OO Total: 7.94E-03 Stack 774 Bldg. 301 306.08 m 3/min 5.10 m3tsec Th-228 79,775,865 O.OOE+OO 1.81E-16 4.63E-16 O.OOE+OO 0.00E+OO O.OOE+oO Th-230 79,775,865 0.00E+OO 6.ISE-16 l.SSE-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-232 79,775,865 O.OOE+OO 3.66E-16 9.35E-16 O.OOE+OO O.OOE+OO O.OOE+OO U-234 79,775,865 O.OOE+OO l.65E-15 4.21E-15 O.OOE+OO O.OOE+OO O.OOE+OO U-235 79,775,865 O.OOE+OO l.O?E-16 2.74E-16 O.OOE+OO 0.00E+OO O.OOE+OO U-238 79,775,865 O.OOE+OO 7.77E-16 l.98E-15 O.OOE+OO O.OOE+OO O.OOE+OO Total: 0.00E+00 Stack 796 Bldg, 100 18.21 m 3/min

• 0.30 m3/sec Pu-241 4,745,664 4.68E-16 9.28E-16 1.65E-15 2.22E-09 2.16E-11 5.85E-04 Tc-99 4,745,664 l.SlE-14 3.00E-14 5.34E-14 7.ISE-08 4.25E-06 l.68E-05 U-234 4,745,664 O.OOE+OO 7.07E-15 2.llE-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 4,745,664 O.OOE+OO 2.19E-16 6.52E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 6.02E-04

1 ECV: Effluenl Concentrallon Value from 10.CFR-20, Appendix: B, Fraction or ECV al the sleek Is provided for reference only. concenlraUons al off-slle locatlons are slgnlflcsnUy less than those reported here (al stack) due lo n,a atmospheric dispersion that occurs before the effluent exlls the site.

Note: A value of *o*was substlluted for n&gelive enely1Ical results.

Printed: 08/09/2022 NFS-EDMS Page 3 of3

Page 9 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195

Attachment 3 To Letter Dated August 22, 2022

Report of Gaseous Effluent Dose and Activity Concentrations for the Maximally Exposed Off-Site Individual for the Release Period January to June 2022

(3 Pages to Follow)

Page 10 of 13

.. 21 G-22-0097 GOV-01-55 ACF-22-0195

Report of Potential Gaseous Effluent Dose to the Maximally Exposed Offsite Individual and on the Maximum Radionuclide Concentrations for the Period:

January to June 2022

Introduction During this biannual period, NRC License SNM-124, Section 9.1.1.3, required NFS to assess the total effective dose equivalent (TEDE) to the maximally exposed offsite receptor and the maximum radioactive air concentrations at the site boundary attributable to NFS' air effluents. The required biannual assessment has been completed and the details of the assessment are provided in the subsequent sections.

Summary of Methods In accordance with SNM-124, Section 9.1.1.4, and internal procedure NFS-HS-A-27, the U.S. Department of Energy's CAP88-PC computer program was used to estimate off-site doses and activity concentrations for gaseous effluents. NFS operated sixteen (16) radiological stacks during the first half of 2022. Based on effluent types and stack physical characteristics, releases from these stacks were grouped into effective stacks for modeling purposes. To accommodate the co-location limitation of the model, the effective stacks were taken to be at the approximate center of the plant site. The distance to the site boundary (nearest model receptor distance) was conservatively taken to be 150 meters for all sectors.

Meteorological data was based on the average wind speed and direction frequencies from the onsite meteorological tower covering the time period for this report.

Atmospheric stability class D (neutral atmosphere) was used for all releases (default value recommended by the U.S. Environmental Protection Agency in "User's Guide for COMPLY"). The most conservative inhalation class was assumed for each radionuclide released. A particle size (activity median aerodynamic diameter or AMAD) of 1.0 micron was assumed for modeling purposes since no information on actual particle sizes exists.

Because CAP88-PC models releases over an entire year, the six-month source term (i.e., total curies of each radionuclide released over the period, given in Attachment 2) was annualized (i.e., transformed into a 12-month release) so that airborne activity concentrations would not be under-estimated during the release period.

Summary of Results Doses are reported in Table 1 below and are derived from the CAP88-PC "Synopsis Report." These doses are at the location of the maximally exposed (off-site) individual (MEI). The results include an adjustment (using the normalization factor mentioned above) to convert the "annualized" doses back to those doses that were actually received in the six-month release period. Activity concentrations reported in Table 2 come directly from the CAP88-PC "Concentration Tables" report; no adjustments are needed for these concentrations. The CAP88-PC output reports are available for review at NFS. Page 11 of 13 21G-22-0097 GOV-01-55 ACF-22-0195

Table 1 summarizes the six-month dose to a hypothetical individual at the MEI location, which was determined to be approximately 550 meters North-Northeast from the center of the plant site. The TEDE to the MEI was estimated to be 2.3E-03 mrem for gaseous effluents released during the first half of 2022. The highest organ committed dose equivalent (COE) to the MEI was estimated to be 1.3E-02 mrem to the lungs. These MEI doses are well below the Environmental Radiological Monitoring Program action levels and applicable regulatory Iimits/ALARA constraints.

Table 1. Organ Doses and Total Effective Dose Equivalent at the MEI Location

Organ Committed Dose Equivalent (mrem per first half of 2022 )

Adrenals 1.6E-04 Urinary Bladder Wall 1.8E-04 Bone Surface 6.5E-03 Brain 1.6E-04 Breasts 1.?E-04 Stomach Wall 2.4E-03 Small Intestine 1.8E-04 Upper Large Intestine Wall 7.6E-04 Lower Large Intestine Wall 1.9E-03 Kidneys 2.2E-03 Liver 5.4E-04 Muscle 1.6E-04 Ovaries 1.6E-04 Pancreas 1.6E-04 Red Bone Marrow 8.3E-04 Skin 3.3E-04 Spleen 1.6E-04 Testes 1.?E-04 Thymus 1.6E-04 Thyroid 1.2E-03 Gall Bladder Wall 1.6E-04 Heart Wall 1.6E-04 Uterus 1.6E-04 Extra-thoracic 1.1 E-02 Lungs 1.3E-02

Total Effective Dose Equivalent 2.3E-03 mrem Location of MEI: 550 meters North-Northeast

Page 12 of 13 21 G-22-0097 GOV-01-55 ACF-22-0195

Table 2 summarizes the maximum radioactive air concentrations at or beyond the site boundary, as determined by CAP88-PC, for the radionuclides released. The total sum of fractions was estimated to be 4.3E-04 and indicates that exposures to the offsite public from gaseous effluents were much less than 1 % of the 10 CFR 20, Appendix B, Table 2, Col. 1 values for all offsite receptors including the site boundary. It is noted that the location of the maximum airborne concentration for a given radionuclide does not necessarily correspond to the MEI location. This is due primarily to the fact that the maximum concentrations for individual nuclides can vary due to differences in values input into the dispersion model for each of the effective stacks - such inputs include stack height, stack diameter, flow rate, and total radionuclide activities released per stack. Another reason for the disparity is the fact that the MEI dose includes both inhalation and ingestion pathways.

Table 2. Maximum Predicted Airborne Concentrations at or Beyond the Site Boundary

Maximum Predicted Airborne Concentrations at

,, :or Beyondthe Site Boundary

• Maximum Concentration: 10 CFR20,App. B, Ratio of Maximum Nuclide,*. Concentration Location, Table 2, 'col. I Value Concentration,to

,' ',. : (I.ICi/inL) Sector Dist(m) (I.ICi/inL) 10 CFR20 Value

99Tc 1.0E-17 NNE 400 9.E-10 l.IE-08

22sTh 3.7E-20 NNE 750 2.E-14 1.SE-06 -*

230Th 4.0E-20 NNE 700 2.E-14 2.0E-06

232Th 3.2E-20 NNE 700 4.E-15 8.0E-06

234u 2.0E-17 NNE 550 5.E-14 4.0E-04

235u 6.7E-19 NNE 600 6.E-14 1.IE-05

- 23su 9.4E-20 NNE 750 6.E-14 1.6E-06

238Pu l.6E-21 NNE 250 2.E-14 8.lE-08

239Pu 5.7E-21 NNE 250 2.E-14 2.9E-07

241Pu 5.4E-19 NNE 400 8.E-13 6.SE-07

241Am 1.3E-21 NNE 250 2.E-14 6.6E-08

c

Sum of Fractions: 4.3E-04

Page 13 of 13