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 Return Receipt Requested 21 G-23-0033 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 individual due to gaseous effluents during the period July to December 2~2.
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/~
Tim Knowles Safety & ~afeguaro_s Director
- rE4~-
- v115SZD CJB/las Attachments
- 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
- VM~s 1205 Banner Hill Rd, Erwin, TN 37650 Page 1 of 14 t
- +1.423.743.9141 f: +1.423.743.0140 www.nuclearfuelservices.com People Strong INNOVATION DRIVEN >
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 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
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 Location (I)
(µCi/ml)
(µCi/ml)
(µCi/ml)
(Ci)
(g)
ECV 1
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
Radioactivity in Effluent Liquid July 1, 2022 to December 31, 2022 Total Activity Volume Concentration Location (I)
(µCi/ml)
WWTF Pu-239/240 3,260,049 2.38E-ll Pu-241 3,260,049 O.OOE+OO Ra-224 3,260,049 l.07E-08 Tc-99 3,260,049 l.63E-08 Th-228 3,260,049 O.OOE+OO Th-230 3,260,049 8.53E-ll Th-231 3,260,049 8.45E-09 Th-232 3,260,049 5.27E-1 I U-232 3,260,049 2.04E-ll U-233/234 3,260,049 1.I IE-08 U-235/236 3,260,049 5.32E-!O U-238 3,260,049 6.ISE-11 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 Error Quantity Estimate LLD Released
(µCi/ml)
(µCi/ml)
(Ci) 8.78E-ll l.62E-10 7.76E-08 l.22E-08 2.09E-08 O.OOE+OO 5.77E-09 l.02E-08 3.SOE-05 5.95E-08 l.03E-07 5.30E-05 l.19E-10 3.IIE-10 O.OOE+OO l.90E-10 3.67E-IO 2.78E-07 3.71E-08 3.97E-08 2.75E-05 l.33E-IO 2.25E-IO l.72E-07 1.41E-10 2.&0E-10 6.65E-08 9.67E-10 l.79E-10 3.63E-05 2.28E-10 1.6IE-IO 1.73E-06 l.OIE-10 l.60E-10 2.0IE-07 NFS-EDMS Page 5 of 14 21 G-23-0033 GOV-01-55 ACF-23-0058 Quantity Fraction Released of (g)
ECV 1
l.25E-06 1.19E-03 O.OOE+OO O.OOE+OO 2.20E-10 5.36E-02 3.14E-03 2.71E-04 O.OOE+OO O.OOE+OO l.38E-05 8.53E-04 5.18E-II I.69E-04 1.58E+OO l.76E-03 3.IIE-09 3.40E-04 5.82E-03 3.71E-02 8.03E-01 I.77E-03 5.99E-O!
2.0SE-04 Total:
1.0lE-01 Page 2 of2 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
Total Volume Location (m3)
Main Stack 416 Th-228 282,542,362 Th-230 282,542,362 Th-232 282,542,362 U-234 282,542,362 U-235 282,542,362 U-238 282,542,362 Stack 185 Bldg. 131 Pu-241 3,162,607 Tc-99 3,162,607 U-234 3,162,607 U-235 3,162,607 Stack 234 Bldg. 234 Am-241 73,143,076 Pu-238 73,143,076 Pu-239/240 73,143,076 Pu-241 73,143,076 Th-228 73,143,076 Th-230 73,143,076 Th-232 73,143,076 U-234 73,143,076 U-238 73,143,076 Stack 327 Bldg. 330 Pu-241 259,537,781 Tc-99 259,537,781 U-234 259,537,781 U-235 259,537,781 Stack 421 Bldg. 100 Pu-241 8,241,087 Tc-99 8,241,087 U-234 8,241,087 U-235 8,241,087 Stack 424 Bldg. 100 Pu-241 7,580,797 Tc-99 7,580,797 1
Radioactivity in Effluent Air July 1, 2022 to December 31, 2022 Activity Error Quantity Concentration Estimate LLD Released
(µCi/ml)
(µCi/ml)
(µCi/ml)
(Ci) 1071.79 m3/min 17.86 m3/sec 7.32E-16 l.SOE-16 l.03E-16 2.07E-07 7.32E-16 l.SOE-16 l.03E-16 2.07E-07 5.49E-16 l.12E-16 7.71E-17 1.55E-07 l.73E-13 3.53E-14 2.42E-14 4.88E-05 6.59E-15 l.35E-15 9.25E-16 l.86E-06 1.83E-15 3.74E-16 2.57E-16 5.l 7E-07 109.81 m3/min 1.83 mo/sec 6.34E-16 8.88E-16 l.52E-15 2.00E-09 2.0SE-14 2.87E-14 4.92E-14 6.48E-08 O.OOE+OO 7.24E-15 l.97E-14 O.OOE+OO O.OOE+OO 2.24E-16 6.IOE-16 O.OOE+OO 277.56 m3/min 4.63 m3/sec 5.20E-18 2.78E-17 5.65E-17 3.SOE-10 6.35E-18 3.40E-17 6.9IE-17 4.65E-10 2.25E-17 1.21E-16 2.45E-16 l.65E-09 6.78E-15 3.9SE-15 S.90E-15 4.96E-07 3.47E-18 l.86E-17 3.77E-17 2.54E-10 4.33E-17 2.32E-16 4.71E-16 3.17E-09 5.49E-17 2.94E-16 S.96E-16 4.0IE-09 1.lSE-16 6.34E-16 1.29E-15 8.66E-09 3.47E-17 1.86E-16 3.77E-16 2.54E-09 984.89 m3/min 16.41 m3/sec 2.73E-15 4.48E-16 5.67E-16 7.09E-07 8.83E-14 1.45E-14 l.83E-14 2.29E-05 l.07E-13 l.24E-14 9.73E-15 2.77E-05 3.30E-15 3.84E-16 3.0IE-16 8.56E-07 31.44 m3/min 0.52 m3/sec 5.l 7E-15 l.26E-15 1.63E-15 4.26E-08 l.67E-13 4.07E-14 5.26E-14 l.38E-06 O.OOE+OO l.61E-14 3.13E-14 O.OOE+OO O.OOE+OO 4.98E-16 9.69E-16 O.OOE+OO 28.96 m3/min 0.48 m3tsec 1.73E-15 9.ISE-16 l.22E-15 l.3 lE-08 5.60E-14 2.96E-14 3.93E-14 4.25E-07 21 G-23-0033 GOV-01-55 ACF-23-0058 Quantity Fraction Released of (g)
ECV 1
2.53E-10 3.66E-02 l.02E-05 3.66E-02 l.42E+OO l.37E-01 7.SIE-03 3.45E+OO 8.62E-Ol l.IOE-01 l.54E+OO 3.0SE-02 Total:
3.80E+00 l.95E-11 7.92E-04 3.83E-06 2.28E-05 0.00E+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
8.lSE-04 l.l lE-10 2.60E-04 2.72E-ll 3.ISE-04 2.65E-08 1.13E-03 4.SIE-09 8.47E-03 3.IOE-13 l.73E-04 J.57E-07 2.17E-03 3.68E-02 l.37E-02 l.39E-06 2.37E-03 7.57E-03 S.78E-04 Total:
2.92E-02 6.88E-09 3.4JE-03 l.36E-03 9.8IE-05 4.43E-03 2.13E+OO 3.96E-Ol 5.SOE-02 Total:
2.19E+00 4.14E-10 6.46E-03 8.ISE-05 l.86E-04 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
6.65E-03 1.28E-10 2.l 7E-03 2.SIE-05 6.23E-05 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
Total Volume Location (m3)
Stack 424 Bldg. 100 U-234 7,580,797 U-235 7,580,797 Stack 573 Bldg 306-W Pu-241 28,788,613 Tc-99 28,788,613 U-234 28,788,613 U-235 28,788,613 Stack 600 Bldg. 110 Pu-241 80,779,818 Tc-99 80,779,818 U-234 80,779,818 U-235 80,779,818 Stack 615 Bldg. 306-W Pu-241 12,842,199 Tc-99 12,842,199 U-234 12,842,199 U-235 12,842,199 Stack 646 Bldg. 110 Pu-241 8,823,943 Tc-99 8,823,943 U-234 8,823,943 U-235 8,823,943 Stack 701 Bldg. 307 Pu-241 30,527,272 Tc-99 30,527,272 U-234 30,527,272 U-235 30,527,272 Stack 702 Bldg. 307 Pu-241 40,772,676 Tc-99 40,772,676 U-234 40,772,676 Radioactivity in Effluent Air July 1, 2022 to December 31, 2022 Activity Error Quantity Concentration Estimate LLD Released
(µCi/ml)
(µCi/ml)
(µCi/ml)
(Ci) 28.96 m3/min 0.48 m3/sec O.OOE+OO 9.35E-15 2.34E-14 O.OOE+OO O.OOE+OO 2.89E-16 7.25E-16 O.OOE+OO 109.25 m3/min 1.82 m3tsec 8.75E-J6 7.07E-16 1.12E-15 2.52E-08 2.83E-14 2.29E-14 3.63E-14 8.ISE-07 O.OOE+OO 6.89E-15 2.JIE-14 O.OOE+OO O.OOE+OO 2.13E-16 6.SIE-16 O.OOE+OO 306.61 m3/min 5.11 m3/sec 1.68E-15 5.27E-16 7.66E-16 l.36E-07 5.44E-14 l.70E-14 2.48E-14 4.39E-06 l.87E-14 7.73E-15 1.40E-14 I.SIE-06 5.80E-16 2.39E-16 4.34E-16 4.68E-08 48.73 m3/min 0.81 m3/sec 8.00E-16 7.62E-16 l.21E-15 l.03E-08 2.59E-14 2.46E-14 3.90E-14 3.32E-07 O.OOE+OO 6.98E-15 2.26E-14 O.OOE+OO O.OOE+OO 2.16E-16 7.00E-16 0.00E+OO 33.49 m3/min 0.56 m3tsec l.06E-15 8.28E-16 l.25E-15 9.34E-09 3.42E-14 2.68E-!4 4.03E-14 3.02E-07 0.00E+OO 7.67E-15 2.32E-14 O.OOE+OO 0.00E+OO 2.37E-16 7.ISE-16 O.OOE+OO 115.84 m3/min 1.93 m3/sec 9.24E-!6 8.48E-16 l.32E-15 2.82E-08 2.99E-14 2.74E-14 4.28E-14 9.12E-07 O.OOE+OO 8.97E-15 2.52E-14 0.00E+OO O.OOE+OO 2.77E-16 7.78E-16 O.OOE+OO 154.72 m3/min 2.58 m3/sec 7.79E-16 7.37E-16 l.16E-15 3.ISE-08 2.52E-14 2.38E-14 3.75E-14 l.03E-06 O.OOE+OO 7.84E-15 2.20E-14 0.00E+OO 21 G-23-0033 GOV-01-55 ACF-23-0058 Quantity Fraction Released of (g)
ECV 1
O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
2.23E-03 2.45E-10 l.09E-03 4.82E-05 3.14E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
I.13E-03 1.32E-09 2.lOE-03 2.60E-04 6.04E-05 2.43E-04 3.75E-01 2.17E-02 9.66E-03 Total:
3.87E-01 9.97E-11 l.OOE-03 l.97E-05 2.87E-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
1.03E-03 9.07E-11 1.32E-03 1.79E-05 3.SOE-05 O.OOE+OO O.OOE+OO O.OOE+OO O.OOE+OO Total:
I.36E-03 2.74E-10 1.ISE-03 5.39E-05 3.32E-05 O.OOE+OO 0.00E+OO O.OOE+OO O.OOE+OO Total:
l.19E-03 3.0SE-10 9.74E-04 6.0SE-05 2.SOE-05 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 Location (m3)
(µCi/ml)
(µCi/ml)
(µCi/ml)
(Ci)
(g)
ECV 1
Stack 702 Bldg. 307 154.72 m3/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 m3/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 m3/min 2.56 m3/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 m3/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 m3/min 0.30 m3/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 To Letter Dated February 20, 2023 21 G-23-0033 GOV-01-55 ACF-23-0058 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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21 G-23-0033 GOV-01-55 ACF-23-0058 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.
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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 Adrenals Urinary Bladder Wall Bone Surface Brain Breasts Stomach Wall Small Intestine Upper Large Intestine Wall Lower Large Intestine Wall Kidneys Liver Muscle Ovaries Pancreas Red Bone Marrow Skin Spleen Testes Thymus Thyroid Gall Bladder Wall Heart Wall Uterus Extra-thoracic Lungs Total Effective Dose Equivalent Location of MEI:
Committed Dose Equivalent (mrem per second half of 2022 )
3.6E-04 4.7E-04 9.0E-03 3.6E-04 3.7E-04 1.2E-02 4.0E-04 2.9E-03 7.SE-03 3.0E-03 9.SE-04 3.6E-04 3.7E-04 3.6E-04 1.2E-03 5.7E-04 3.6E-04 3.SE-04 3.6E-04 6.0E-03 3.6E-04 3.6E-04 3.6E-04 1.5E-02 1.7E-02 4.BE-03 mrem 450 meters Northeast Page 12 of 14
21 G-23-0033 GOV-01-55 ACF-23-0058 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 Nuclide Maximum Predicted Airborne Concentrations at or Beyond the Site Boundary Maximum Concentration
(µCi/mL)
Concentration Location Sector Dist (m) 10 CFR20, App. B, Ratio of Maximum Table 2, Col. 1 Value Concentration to
(µCi/mL) 10 CFR20 Value
- -*- -------~---------*--"'"
99Tc 4.5E-17 NE 450 9.E-10 4.9E-08
*-*------*- -------*-**----*---*- ~----*-*--*- --*****M* --****---*-
228Th 4.6E-20 NE 700 2.E-14 2.3E-06 230Th 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 238U 1.2E-19 NE 700 6.E-14 l.9E-06 238Pu 9.9E-22 NE 200 2.E-14 5.0E-08 3.SE-21 NE 200 2.E-14 l.SE-07
--.-----------1------1----------------- --*--**--*-------
5.3E-18 NE 350 8.E-13 200 2.E-14 Sum of Fractions:
Page 13 of 14 6.6E-06 4.lE-08 5.6E-04
21 G-23-0033 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 Page 14 of 14