ML23066A058
| ML23066A058 | |
| Person / Time | |
|---|---|
| Site: | Erwin |
| Issue date: | 02/20/2023 |
| From: | Knowles T BWXT, Nuclear Fuel Services |
| To: | Document Control Desk, Office of Nuclear Material Safety and Safeguards |
| References | |
| GOV-01-55, ACF-23-0058, 21G-23-0033 | |
| Download: ML23066A058 (1) | |
Text
BW Nuclear Fuel Services, Inc.
Certified Mail 21 G-23-0033 Return Receipt Requested GOV-01-55 ACF-23-0058 February 20, 2023
Director Office of Nuclear Material Safety & Safeguards U.S. Nuclear Regulatory Commission ATTN: Document Control Desk W~shington, DC 20555-0001
Reference:
Docket No.70-143; SNM License 124
Subject:
Biannual Effluent MonitQring Report July to December 2022
Dear Director:
In accordance with the requirements set forth in 10 CFR Part 70.59, Nuclear Fuel Services, Inc. (NFS); submits-the attached reports. Attachment 1 reports the Radioactivity in Effluent Liquid for the period July to December 2022. Attachment 2 reports the Radioactivity in Effluent Air for the period July to December 2022. Attachment 3 summarizes an evaluation of the*dose and air activity concentrations for the maximally exposed offsite 2~2.... individual due to gaseous effluents during the period July to December
If you or your staff have any questions, require additiorialiriformation*,* or wish to discuss this, please contact me or Mr. R. Jason Faddis, Deputy Environmental Protection and Industrial Safety Section Manager, at (423) 735-5438. Please reference our unique document identification number (21 G-23-0033) in any correspondence concerning this letter.... *'..
Sincerely,
NUCLEAR.FUEL SERVICES, INC.
j/4/~ :rE4~
Tim Knowles ;v115SZD Safety & ~afeguaro_s Director CJB/las Attachments ;VM~s
- 1) Report of Radioactivity in Effluent Liquid for the Period July to December 2022
- 2) Report of Radioactivity in Effluent Air for the Period July *to December 2022
- 3) Report of Gaseous Effluent Dose and Activity Concentrations for the Maximally Exposed Off-Site Individual for the Release Period Ju.ly to December 2022
People Strong 1205 Banner Hill Rd, Erwin, TN 37650 Page 1 of 14 t: +1.423.743.9141 f: +1.423.743.0140 www.nuclearfuelservices.com
- INNOVATION DRIVEN >
21 G-23-0033 GOV-01-55 ACF-23-0058
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 14 21 G-23-0033 GOV-01-55 ACF-23-0058
Attachment 1 To Letter Dated February 20, 2023
Report of Radioactivity in Effluent Liquid for the Period July to December 2022
(2 Pages to Follow)
Page 3 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Radioactivity in Effluent Liquid July 1, 2022 to December 31, 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-238 446,898,000 1.44E-ll 9.59E-ll 2.04E-10 6.43E-06 3.76E-07 7.19E-04 Pu-239/240 446,898,000 O.OOE+OO I.OIE-10 2.41E-10 O.OOE+OO O.OOE+OO O.OOE+OO Tc-99 446,898,000 9.56E-09 2.71E-08 4.67E-08 4.27E-03 2.53E-Ol l.59E-04 Th-228 446,898,000 O.OOE+OO l.29E-10 3.14E-10 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 446,898,000 l.07E-10 l.93E-10 3.34E-10 4.SOE-05 2.38E-03 l.07E-03 Th-232 446,898,000 l.66E-11 l.llE-10 2.29E-10 7.40E-06 6.79E+Ol 5.52E-04 U-233/234 446,898,000 2.82E-10 2.49E-IO 3.32E-10 l.26E-04 2.02E-02 9.40E-04 U-235/236 446,898,000 5.35E-!1 l.48E-10 2.21E-10 2.39E-05 1.l lE+Ol l.78E-04 U-238 446,898,000 6.!4E-1 l l.40E-10 2.44E-10 2.75E-05 8.20E+Ol 2.0SE-04 Total: 3.83E-03 Sewer Pu-238 19,404,000 O.OOE+OO l.47E-10 3.39E-10 0.00E+OO O.OOE+OO O.OOE+OO Pu-239/240 19,404,000 O.OOE+OO l.34E-10 3.49E-10 O.OOE+OO O.OOE+OO O.OOE+OO Tc-99 19,404,000 1.48E-08 2.83E-08 4.82E-08 2.88E-04 l.70E-02 2.47E-05 Th-228 19,404,000 O.OOE+OO l.56E-10 3.56E-10 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 19,404,000 l.34E-10 2.44E-!O 4.lSE-10 2.61E-06 !.29E-04 1.34E-04 Th-232 19,404,000 3.99E-12 l.21E-10 2.56E-10 7.74E-08 7. IOE-01 1.33E-05 U-232 19,404,000 O.OOE+OO l.27E-10 2.90E-10 O.OOE+OO O.OOE+OO 0.00E+OO U-233/234 19,404,000 6.74E-09 7.62E-10 l.77E-10 1.31E-04 2.IOE-02 2.25E-03 U-235/236 19,404,000 3.40E-10 I.BIE-10 l.33E-10 6.60E-06 3.06E+OO 1.13E-04 U-238 19,404,000 6.93E-10 2.57E-10 l.39E-10 l.35E-05 4.02E+Ol 2.31E-04 Total: 2.76E-03 West Ditch Pu-238 122,923,000 2.32E-11 l.09E-10 2.25E-10 2.BSE-06 !.67E-07 1.16E-03 Pu-239/240 122,923,000 2.19E-12 l.03E-l0 2.26E-10 2.69E-07 4.32E-06 l.09E-04 Tc-99 122,923,000 6.SlE-09 2.65E-08 4.58E-08 8.00E-04 4.74E-02 l.09E-04 Th-228 122,923,000 O.OOE+OO I.SSE-IO 3.63E-10 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 122,923,000 5.02E-ll l.93E-10 3.72E-10 6.l 7E-06 3.06E-04 5.02E-04 Th-232 122,923,000 l.31E-!1 l.lOE-10 2.29E-10 l.61E-06 1.47E+Ol 4.36E-04 U-233/234 122,923,000 l.44E-08 l.52E-09 4.IBE-10 l.77E-03 2.83E-01 4.79E-02 U-235/236 122,923,000 6.29E-10 3.75E-10 2.60E-10 7.73E-05 3.58E+Ol 2.IOE-03 U-238 122,923,000 9.79E-10 4.27E-10 3.25E-10 l.20E-04 3.59E+02 3.26E-03 Total: 5.56E-02 WWTF Am-241 3,260,049 4.28E-ll I.OSE-10 l.77E-10 1.40E-07 4.07E-08 2.14E-03 Cs-137 3,260,049 3.0lE-1 I l.52E-09 l.62E-09 9.82E-08 1.13E-09 3.0IE-05 Na-22 3,260,049 O.OOE+OO 7.97E-10 l.44E-09 O.OOE+OO O.OOE+OO 0.00E+OO Np-237 3,260,049 5.62E-!2 2.88E-IO 6.20E-10 1.83E-08 2.60E-05 2.SIE-04 Pb-212 3,260,049 O.OOE+OO 3.28E-09 3.26E-09 O.OOE+OO O.OOE+OO O.OOE+OO Pu-238 3,260,049 2.58E-ll 8.88E-11 l.61E-10 8.41E-08 4.92E-09 1.29E-03
ECV: Effluent Concentra1ion Value from 10-CFR-20, Appendix 8.
Note: A value of ~a~ was substituted for negative analytical results.
Printed: 02/07/2023 NFS-EDMS Page 1 of2
Page 4 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Radioactivity in Effluent Liquid July 1, 2022 to December 31, 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 WWTF Pu-239/240 3,260,049 2.38E-ll 8.78E-ll l.62E-10 7.76E-08 l.25E-06 1.19E-03 Pu-241 3,260,049 O.OOE+OO l.22E-08 2.09E-08 O.OOE+OO O.OOE+OO O.OOE+OO Ra-224 3,260,049 l.07E-08 5.77E-09 l.02E-08 3.SOE-05 2.20E-10 5.36E-02 Tc-99 3,260,049 l.63E-08 5.95E-08 l.03E-07 5.30E-05 3.14E-03 2.71E-04 Th-228 3,260,049 O.OOE+OO l.19E-10 3.IIE-10 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 3,260,049 8.53E-ll l.90E-10 3.67E-IO 2.78E-07 l.38E-05 8.53E-04 Th-231 3,260,049 8.45E-09 3.71E-08 3.97E-08 2.75E-05 5.18E-II I.69E-04 Th-232 3,260,049 5.27E-1 I l.33E-IO 2.25E-IO l.72E-07 1.58E+OO l.76E-03 U-232 3,260,049 2.04E-ll 1.41E-10 2.&0E-10 6.65E-08 3.IIE-09 3.40E-04 U-233/234 3,260,049 1.I IE-08 9.67E-10 l.79E-10 3.63E-05 5.82E-03 3.71E-02 U-235/236 3,260,049 5.32E-!O 2.28E-10 1.6IE-IO 1.73E-06 8.03E-01 I.77E-03 U-238 3,260,049 6.ISE-11 l.OIE-10 l.60E-10 2.0IE-07 5.99E-O! 2.0SE-04 Total: 1.0lE-01
ECV: Effluent Concentration Value from 10..CFR-20, Appendbt 8.
Note: A value of "O" was substituted for negative analytical results.
Printed: 02/07/2023 NFS-EDMS Page 2 of2
Page 5 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058
Attachment 2 To Letter Dated February 20, 2023
Report of Radioactivity in Effluent Air for the Period July to December 2022
(3 Pages to Follow)
Page 6 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Radioactivity in Effluent Air July 1, 2022 to December 31, 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 1071.79 m 3/min 17.86 m 3/sec Th-228 282,542,362 7.32E-16 l.SOE-16 l.03E-16 2.07E-07 2.53E-10 3.66E-02 Th-230 282,542,362 7.32E-16 l.SOE-16 l.03E-16 2.07E-07 l.02E-05 3.66E-02 Th-232 282,542,362 5.49E-16 l.12E-16 7.71E-17 1.55E-07 l.42E+OO l.37E-01 U-234 282,542,362 l.73E-13 3.53E-14 2.42E-14 4.88E-05 7.SIE-03 3.45E+OO U-235 282,542,362 6.59E-15 l.35E-15 9.25E-16 l.86E-06 8.62E-Ol l.IOE-01 U-238 282,542,362 1.83E-15 3.74E-16 2.57E-16 5.l 7E-07 l.54E+OO 3.0SE-02 Total: 3.80E+00 Stack 185 Bldg. 131 109.81 m 3/min 1.83 mo/sec Pu-241 3,162,607 6.34E-16 8.88E-16 l.52E-15 2.00E-09 l.95E-11 7.92E-04 Tc-99 3,162,607 2.0SE-14 2.87E-14 4.92E-14 6.48E-08 3.83E-06 2.28E-05 U-234 3,162,607 O.OOE+OO 7.24E-15 l.97E-14 O.OOE+OO 0.00E+OO O.OOE+OO U-235 3,162,607 O.OOE+OO 2.24E-16 6.IOE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 8.lSE-04 Stack 234 Bldg. 234 277.56 m 3/min 4.63 m 3/sec Am-241 73,143,076 5.20E-18 2.78E-17 5.65E-17 3.SOE-10 l.l lE-10 2.60E-04 Pu-238 73,143,076 6.35E-18 3.40E-17 6.9IE-17 4.65E-10 2.72E-ll 3.ISE-04 Pu-239/240 73,143,076 2.25E-17 1.21E-16 2.45E-16 l.65E-09 2.65E-08 1.13E-03 Pu-241 73,143,076 6.78E-15 3.9SE-15 S.90E-15 4.96E-07 4.SIE-09 8.47E-03 Th-228 73,143,076 3.47E-18 l.86E-17 3.77E-17 2.54E-10 3.IOE-13 l.73E-04 Th-230 73,143,076 4.33E-17 2.32E-16 4.71E-16 3.17E-09 J.57E-07 2.17E-03 Th-232 73,143,076 5.49E-17 2.94E-16 S.96E-16 4.0IE-09 3.68E-02 l.37E-02 U-234 73,143,076 1.lSE-16 6.34E-16 1.29E-15 8.66E-09 l.39E-06 2.37E-03 U-238 73,143,076 3.47E-17 1.86E-16 3.77E-16 2.54E-09 7.57E-03 S.78E-04 Total: 2.92E-02
Stack 327 Bldg. 330 984.89 m 3/min 16.41 m3/sec Pu-241 259,537,781 2.73E-15 4.48E-16 5.67E-16 7.09E-07 6.88E-09 3.4JE-03 Tc-99 259,537,781 8.83E-14 1.45E-14 l.83E-14 2.29E-05 l.36E-03 9.8IE-05 U-234 259,537,781 l.07E-13 l.24E-14 9.73E-15 2.77E-05 4.43E-03 2.13E+OO U-235 259,537,781 3.30E-15 3.84E-16 3.0IE-16 8.56E-07 3.96E-Ol 5.SOE-02 Total: 2.19E+00
Stack 421 Bldg. 100 31.44 m 3/min 0.52 m3/sec Pu-241 8,241,087 5.l 7E-15 l.26E-15 1.63E-15 4.26E-08 4.14E-10 6.46E-03 Tc-99 8,241,087 l.67E-13 4.07E-14 5.26E-14 l.38E-06 8.ISE-05 l.86E-04 U-234 8,241,087 O.OOE+OO l.61E-14 3.13E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 8,241,087 O.OOE+OO 4.98E-16 9.69E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 6.65E-03
Stack 424 Bldg. 100 28.96 m 3/min 0.48 m3tsec Pu-241 7,580,797 1.73E-15 9.ISE-16 l.22E-15 l.3 lE-08 1.28E-10 2.l 7E-03 Tc-99 7,580,797 5.60E-14 2.96E-14 3.93E-14 4.25E-07 2.SIE-05 6.23E-05
1 ECV: Effluent ConcentraUon Value from 1 0-CFR.-20, Appendix B. Fraction of ECV et the stack is provided for reference only. Concentrations at off-site locatlons are slgnlflcantly less than those reported here (at stack) due to the atmospheric dispersion that occurs before the effluent exits the site.
Note: A value of *o* was substituted for negative analytical results.
Printed: 02/07/2023 NFS-EDMS Page I of3
Page 7 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Radioactivity in Effluent Air July 1, 2022 to December 31, 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 28.96 m 3/min 0.48 m3/sec U-234 7,580,797 O.OOE+OO 9.35E-15 2.34E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 7,580,797 O.OOE+OO 2.89E-16 7.25E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: 2.23E-03
Stack 573 Bldg 306-W 109.25 m 3/min 1.82 m3tsec Pu-241 28,788,613 8.75E-J6 7.07E-16 1.12E-15 2.52E-08 2.45E-10 l.09E-03 Tc-99 28,788,613 2.83E-14 2.29E-14 3.63E-14 8.ISE-07 4.82E-05 3.14E-05 U-234 28,788,613 O.OOE+OO 6.89E-15 2.JIE-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 28,788,613 O.OOE+OO 2.13E-16 6.SIE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: I.13E-03
Stack 600 Bldg. 110 306.61 m 3/min 5.11 m 3/sec Pu-241 80,779,818 1.68E-15 5.27E-16 7.66E-16 l.36E-07 1.32E-09 2.lOE-03 Tc-99 80,779,818 5.44E-14 l.70E-14 2.48E-14 4.39E-06 2.60E-04 6.04E-05 U-234 80,779,818 l.87E-14 7.73E-15 1.40E-14 I.SIE-06 2.43E-04 3.75E-01 U-235 80,779,818 5.80E-16 2.39E-16 4.34E-16 4.68E-08 2.17E-02 9.66E-03 Total: 3.87E-01 Stack 615 Bldg. 306-W 48.73 m 3/min 0.81 m 3/sec Pu-241 12,842,199 8.00E-16 7.62E-16 l.21E-15 l.03E-08 9.97E-11 l.OOE-03 Tc-99 12,842,199 2.59E-14 2.46E-14 3.90E-14 3.32E-07 l.97E-05 2.87E-05 U-234 12,842,199 O.OOE+OO 6.98E-15 2.26E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 12,842,199 O.OOE+OO 2.16E-16 7.00E-16 0.00E+OO O.OOE+OO O.OOE+OO Total: 1.03E-03 Stack 646 Bldg. 110 33.49 m 3/min 0.56 m3tsec Pu-241 8,823,943 l.06E-15 8.28E-16 l.25E-15 9.34E-09 9.07E-11 1.32E-03 Tc-99 8,823,943 3.42E-14 2.68E-!4 4.03E-14 3.02E-07 1.79E-05 3.SOE-05 U-234 8,823,943 0.00E+OO 7.67E-15 2.32E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 8,823,943 0.00E+OO 2.37E-16 7.ISE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: I.36E-03 Stack 701 Bldg. 307 115.84 m 3/min 1.93 m3/sec Pu-241 30,527,272 9.24E-!6 8.48E-16 l.32E-15 2.82E-08 2.74E-10 1.ISE-03 Tc-99 30,527,272 2.99E-14 2.74E-14 4.28E-14 9.12E-07 5.39E-05 3.32E-05 U-234 30,527,272 O.OOE+OO 8.97E-15 2.52E-14 0.00E+OO O.OOE+OO 0.00E+OO U-235 30,527,272 O.OOE+OO 2.77E-16 7.78E-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: l.19E-03
Stack 702 Bldg. 307 154.72 m 3/min 2.58 m 3/sec Pu-241 40,772,676 7.79E-16 7.37E-16 l.16E-15 3.ISE-08 3.0SE-10 9.74E-04 Tc-99 40,772,676 2.52E-14 2.38E-14 3.75E-14 l.03E-06 6.0SE-05 2.SOE-05 U-234 40,772,676 O.OOE+OO 7.84E-15 2.20E-14 0.00E+OO O.OOE+OO O.OOE+OO
ECV: Effluent Concentration Value from 10-CFR-20, Appendix B. Fraction of ECV at the stack Is provided for reference only. Concentrations at off-site locations are significantly less than those reported here (at stack) due to the atmospheric dispersion that occurs before the effluent e~ts the site.
Nole: A value of ao* was substituted for negative analytlcal results.
Printed: 02/07/2023 NFS-EDMS Page 2 of3
Page 8 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Radioactivity in Effluent Air July 1, 2022 to December 31, 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 702 Bldg. 307 154.72 m 3/min 2.58 m3/sec U-235 40,772,676 O.OOE+OO 2.43E-16 6.SIE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: l.OOE-03
Stack 703 Exhaust Room Air 769.00 m 3/min 12.82 m 3/sec Pu-241 202,647,063 2.16E-14 2.23E-14 3.61E-14 4.38E-06 4.25E-08 2.70E-02 Th-228 202,647,063 O.OOE+OO 7.46E-16 2.09E-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 202,647,063 O.OOE+OO 4.30E-16 1.20E-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-232 202,647,063 O.OOE+OO 6.IIE-16 l.7 IE-15 0.00E+OO O.OOE+OO O.OOE+OO U-234 202,647,063 O.OOE+OO 4.67E-15 1.3 IE-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 202,647,063 O.OOE+OO 4.83E-16 1.35E-15 O.OOE+OO O.OOE+OO O.OOE+OO U-238 202,647,063 O.OOE+OO 5.SSE-16 1.64E-15 0.00E+OO 0.00E+OO O.OOE+OO Total: 2.70E-02 Stack 773 Bldg. 440 153.85 m 3/min 2.56 m 3/sec Pu-241 40,541,352 3.03E-14 3.09E-14 4.87E-14 l.23E-06 l.19E-08 3.79E-02 Th-228 40,541,352 O.OOE+OO l.29E-15 3.99E-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 40,541,352 O.OOE+oO l.66E-15 5.13E-15 O.OOE+OO O.OOE+OO O.OOE+OO Th-232 40,541,352 O.OOE+OO I.IOE-15 3.42E-!5 O.OOE+OO O.OOE+OO O.OOE+OO U-234 40,541,352 O.OOE+OO 3.40E-15 I.OSE-14 0.00E+OO O.OOE+OO O.OOE+OO U-235 40,541,352 O.OOE+OO 5.98E-16 l.85E-15 O.OOE+OO O.OOE+OO O.OOE+OO U-238 40,541,352 O.OOE+OO l.20E-15 3.70E-15 O.OOE+OO O.OOE+OO O.OOE+OO Total: 3.79E-02 Stack 77 4 Bldg. 30 l 317.23 m 3/min 5.29 m3/scc Tc-99 83,576,743 6.60E-13 2.24E-14 1.86E-14 5.52E-05 3.27E-03 7.34E-04 Th-228 83,576,743 O.OOE+OO l.90E-16 4.91E-16 O.OOE+OO O.OOE+OO O.OOE+OO Th-230 83,576,743 O.OOE+oO 6.49E-16 l.67E-15 O.OOE+OO 0.00E+OO O.OOE+OO Th-232 83,576,743 O.OOE+OO 3.SSE-16 9.93E-16 O.OOE+OO O.OOE+OO O.OOE+OO U-234 83,576,743 O.OOE+OO l.73E-15 4.47E-15 O.OOE+OO O.OOE+OO O.OOE+OO U-235 83,576,743 O.OOE+OO l.13E-16 2.91E-16 O.OOE+OO O.OOE+OO O.OOE+OO U-238 83,576,743 O.OOE+OO 8.16E-16 2.l lE-15 O.OOE+OO O.OOE+OO O.OOE+OO Total: 7.34E-04
Stack 796 Bldg. 100 17.95 m 3/min 0.30 m 3/sec Pu-241 4,730,821 l.32E-15 8.22E-16 1.16E-15 6.24E-09 6.06E-11 l.65E-03 Tc-99 4,730,821 4.27E-14 2.66E-14 3.75E-14 2.02E-07 l.19E-05 4.74E-05 U-234 4,730,821 O.OOE+oO 7.35E-15 2.20E-14 O.OOE+OO O.OOE+OO O.OOE+OO U-235 4,730,821 O.OOE+oO 2.27E-16 6.SlE-16 O.OOE+OO O.OOE+OO O.OOE+OO Total: l.70E-03
1 ECV: Effluent Concentration Value from 10-CFR-20, Appendix B. Fraction of ECV at the stack is provided for reference only. Concentrations at off-site locations are significantly less than those reported here (at stack) due to the atmospheric dispersion that occurs before the effluent exits the site.
Note: A value of uo* was substiluted for negative analytlca/ results.
Printed: 02/07/2023 NFS-EDMS Page 3 of3
Page 9 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058
Attachment 3 To Letter Dated February 20, 2023
Report of Gaseous Effluent Dose and Activity Concentrations for the Maximally Exposed Off-Site Individual for the Release Period July to December 2022
(4 Pages to Follow)
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Report of Potential Gaseous Effluent Dose to the Maximally Exposed Offsite Individual and on the Maximum Radionuclide Concentrations for the Period:
July to December 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 second 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 14 21 G-23-0033 GOV-01-55 ACF-23-0058
Table 1 summarizes the six-month dose to a hypothetical individual at the MEI location, which was determined to be approximately 450 meters Northeast from the center of the plant site. The TEDE to the MEI was estimated to be 4.SE-03 mrem for gaseous effluents released during the second half of 2022. The highest organ committed dose equivalent (COE) to the MEI was estimated to be 1.7E-02 mrem to the lungs. These MEI doses are well below the Environmental Radiological Monitoring Program action levels and applicable regulatory limits/ALARA constraints.
- Table 1. Organ Doses and Total Effective Dose Equivalent at the MEI Location
Organ Committed Dose Equivalent (mrem per second half of 2022 )
Adrenals 3.6E-04 Urinary Bladder Wall 4.7E-04 Bone Surface 9.0E-03 Brain 3.6E-04 Breasts 3.7E-04 Stomach Wall 1.2E-02 Small Intestine 4.0E-04 Upper Large Intestine Wall 2.9E-03 Lower Large Intestine Wall 7.SE-03 Kidneys 3.0E-03 Liver 9.SE-04 Muscle 3.6E-04 Ovaries 3.7E-04 Pancreas 3.6E-04 Red Bone Marrow 1.2E-03 Skin 5.7E-04 Spleen 3.6E-04 Testes 3.SE-04 Thymus 3.6E-04 Thyroid 6.0E-03 Gall Bladder Wall 3.6E-04 Heart Wall 3.6E-04 Uterus 3.6E-04 Extra-thoracic 1.5E-02 Lungs 1.7E-02
Total Effective Dose Equivalent 4.BE-03 mrem Location of MEI: 450 meters Northeast
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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 5.6E-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 Beyond the Site Boundary
Maximum Concentration 10 CFR20, App. B, Ratio of Maximum Nuclide Concentration Location Table 2, Col. 1 Value Concentration to
(µCi/mL) Sector Dist (m) (µCi/mL) 10 CFR20 Value
99 Tc 4.5E-17 NE 450 9.E-10 4.9E-08 *-*--------~---------*--"'"
*-*------*- -------*-**----*---*- ~----*-*--*- --*****M* --****---*-*-- --- --- -------- ------ ----------------
228Th 4.6E-20 NE 700 2.E-14 2.3E-06 230 Th 4.7E-20 NE 700 2.E-14 2.4E-06
*-*-------- ------~------------~---------- ----- - ------~ --~---- ----------- ------ --- ---- ----------- -- -
232Th 3.6E-20 NE 700 4.E-15 9.lE-06
-- ------ --- --------------- ----*--- ------- --- ---------------- ________ 2.6E-17 NE 500 5.E-14 5.2E-04, ----------
8.8E-19 NE 550 6.E-14 l.5E-05 238 U 1.2E-19 NE 700 6.E-14 l.9E-06
-- -- --- --------*-- -- *-*--*-----238 Pu 9.9E-22 NE 200 2.E-14 5.0E-08 __,_., __ ---- *--*---*---*-***---- -,- - ---,---"-* - --*
--.-----------1------1---------- ------- --*--**--*-------3.SE-21 NE 200 2.E-14 l.SE-07 5.3E-18 NE 350 8.E-13 6.6E-06 200 2.E-14 4.lE-08
Sum of Fractions: 5.6E-04
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.. GOV-01-55 ACF-23-0058
The TEDE to the MEI for gaseous effluents released during 2022 is provided in Table 3.
The results for the 1st half of 2022 were previously reported in Biannual Effluent Monitoring Report January to June 2022 (21 G-22-0097). The annual dose is well below the Environmental Radiological Monitoring Program action levels and applicable regulatory limits/ALARA constraints.
Table 3. Annual Dose to the MEI for Gaseous Effluents Released During 2022
Period Direction Distance TEDE
.... Covered (m) (mrem)
2nd Half NE 450 4.8E-03
1st Half NNE 550 2.3E-03
Annual Total 7.lE-03
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