ML22018A039

NPDES Biocide/Corrosion Treatment Plan Annual Report, Cy 2021

ML22018A039
Person / Time
Site:	Sequoyah
Issue date:	01/13/2022
From:	Markum T Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TN0026450
Download: ML22018A039 (7)

Text

1\14 TENNESSEE VALLEY AUTHORITY Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, TN 37384 January 13, 2022 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001

Subject:

Sequoyah Nuclear Plant, NPDES Biocide/Corrosion Treatment Plan Annual Report, CY 2021 Attached is the NPDES Biocide/Corrosion Treatment Plan Annual Report for 2021 for Sequoyah Nuclear Plant.

Respectfully, Travis R. Markum Environmental Scientist

From: Markum, Travis R To: Sarah Terpstra; "Michael Bascom" Cc: Water Permits; Pierson, Callan

Subject:

TN0026450 SQN BCTP Annual Report 2021 Date: Thursday, January 13, 2022 3:54:00 PM Attachments: BCTP Annual Report 2021 01.13.22.pdf See attached Biocide/Corrosion Treatment Plan annual report for 2021 for Sequoyah Nuclear Plant.

An electronic copy was also attached to the December 2021 DMR submittal for Outfall 101.

Travis R. Markum Env. Scientist (Compliance)

Environmental Operations TVA Sequoyah Nuclear Plant PO Box 2000, OPS 5N Soddy Daisy, TN 37384

(: 423-843-6714

• trmarkum@tva.gov NOTICE: This electronic message transmission contains information that may be TVA SENSITIVE, TVA RESTRICTED, or TVA CONFIDENTIAL. Any misuse or unauthorized disclosure can result in both civil and criminal penalties. If you are not the intended recipient, be aware that any disclosure, copying, distribution, or use of the content of this information is prohibited. If you have received this communication in error, please notify me immediately by email and delete the original message.

TV4 TENNESSEE VALLEY AUTHORITY Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, TN 37384 Sent Via Electronic Mail January 13, 2022 Ms. Sarah Terpstra Division of Water Resources Tennessee Department of Environment and Conservation (TDEC)

William R. Snodgrass Tennessee Tower 312 Rosa L. Parks Avenue, 11th Floor Nashville, Tennessee 37243

Dear Ms. Terpstra:

TENNESSEE VALLEY AUTHORITY (TVA)- SEQUOYAH NUCLEAR PLANT (SQN)- NPDES PERMIT NO. TN0026450 - BIOCIDE/CORROSION TREATMENT PLAN (B/CTP) ANNUAL REPORT 2021 Enclosed is a copy of the CY 2021 8/CTP Annual report for SQN . All treatments in 2021 were conducted in accordance with the approved 8/CTP.

If you have any questions or need additional information, please contact Travis Markum at (423) 843-6714 or by e-mail at trmarkum@tva.gov of Sequoyah's Environmental staff.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Sincerely,

?a~!~

Senior Manager, Chemistry/Environmental Sequoyah Nuclear Plant Enclosures cc (Electronic Distribution w/ Enclosures):

Mr. Michael Bascom Chattanooga Environmental Field Office Division of Water Resources 1301 Riverfront Parkway, Suite #206 Chattanooga, Tennessee 37402 U.S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, D.C. 20555

TN0026450 SQN 2021 Biocide/Corrosion Treatment Plan Annual Report Flogard MS6236 Duration in Analytical Results Quantity in Pounds Hours (mass balance calculations)

(hrs/day) (lbs/day) (mg/L)

Days of Month Maximum* Maximum Average Limit Maximum Average Limit Treatment (based on days in service)

January - - - 2275 - - 0.2 -

February - - - 2275 - - 0.2 -

March - - - 2275 - - 0.2 -

April - - - 2275 - - 0.2 -

May 19.5 334 293 2275 0.0285 0.0285 0.2 5 June 24.0 418 270 2275 0.0289 0.0284 0.2 22 July 24.0 1444 552 2275 0.0309 0.0286 0.2 19 August 19.0 987 527 2275 0.0289 0.0285 0.2 22 September 19.0 708 340 2275 0.0291 0.0285 0.2 15 October - - - 2275 - - 0.2 -

November 24.0 418 279 2275 0.0287 0.0285 0.2 15 December 24.0 417 293 2275 0.0291 0.0286 0.2 16 Jan. - Dec. 24.0 1444 - 2275 0.0309 - 0.2 114 Per Part III.E of the NPDES permit: "WET testing shall be performed twice per year at Outfall 101: once per year when oxidizing biocides are being used, and once per year when non-oxidizing biocides are being used."

• Maximum treatment duration is listed individually per system: ERCW A, ERCW, B and RCW.

TN0026450 SQN 2021 Biocide/Corrosion Treatment Plan Annual Report Spectrus BD 1500 Duration in Analytical Results Quantity in Pounds Hours mass balance calculations (hrs/day) (lbs/day) (mg/L)

Days of Month Maximum* Maximum Average Limit Maximum Average Limit Treatment (based on days in service)

January 0.4 26 26 50 0.0510 0.0478 2.0 4 February 0.5 29 25 50 0.0470 0.0470 2.0 7 March 0.5 29 23 50 0.0480 0.0473 2.0 7 April 0.3 22 17 50 0.0560 0.0529 2.0 14 May 0.3 19 12 50 0.0820 0.0577 2.0 14 June 0.3 19 14 50 0.0560 0.0474 2.0 14 July 0.3 19 19 50 0.0470 0.0468 2.0 13 August 0.3 19 16 50 0.0470 0.0470 2.0 13 September 0.3 19 16 50 0.0470 0.0468 2.0 10 October 0.3 19 19 50 0.0880 0.0848 2.0 13 November 0.4 28 21 50 0.0880 0.0531 2.0 7 December 0.5 38 31 50 0.0480 0.0472 2.0 6 Jan. - Dec. 0.5 38 - 50 0.0880 - 2.0 122 Per the B/CTP approval: Spectrus BD1500 is a surfactant that is injected into the ERCW and RCW systems for approximately 30 minutes prior initiating chlorination to enhance the effectiveness of the chlorination.

• Maximum treatment duration is listed individually per system: ERCW A, ERCW, B and RCW.

TN0026450 SQN 2021 Biocide/Corrosion Treatment Plan Annual Report Spectrus CT1300 Duration in Analytical Results Quantity in Pounds Hours mass balance calculations (hrs/day) (lbs/day) (mg/L)

Days of Month Maximum* Maximum Average Limit Maximum Average Limit Treatment (based on days in service)

January - - - 855 - - 0.1 -

February 15.0 300 240 855 0.0334 0.0333 0.1 4 March 14.8 297 253 855 0.0336 0.0335 0.1 4 April 15.0 240 192 855 0.0477 0.0473 0.1 4 May 21.8 438 281 855 0.0332 0.0331 0.05 6 June 21.8 438 299 855 0.0331 0.0330 0.05 6 July 14.8 295 220 855 0.0367 0.0348 0.05 2 August 24.0 483 263 855 0.0331 0.0330 0.05 6 September 24.0 483 298 855 0.0334 0.0330 0.05 8 October 22.3 230 164 855 0.0467 0.0467 0.1 3 November 24.0 406 258 855 0.0330 0.0299 0.05 5 December - - - 855 - - 0.05 -

Jan. - Dec. 24.0 483 - 855 0.0477 - 0.05 48 Per Part III.E of the NPDES permit: "WET testing shall be performed twice per year at Outfall 101: once per year when oxidizing biocides are being used, and once per year when non-oxidizing biocides are being used."

Outfall 101: Toxicity was sampled September 12-17, 2021 during Spectrus CT 1300 treatment Test Results: Pimephales promelas : IC25 >100%

Ceriodaphnia dubia : IC25 > 100%

Outfall 110: There has been no discharge from Outfall 110 January - December 2021.

• Maximum treatment duration is listed individually per system: ERCW A, ERCW, B and RCW.

TN0026450 SQN 2021 Biocide/Corrosion Treatment Plan Annual Report Towerbrom 960 Duration in Analytical Results Quantity in Pounds Hours mass balance calculation (hrs/day) (lbs/day) (mg/L)

Days of Month Maximum* Maximum Average Limit Maximum Average Limit Treatment (based on days in (see Note) (see Note) (daily max) service)

January 4.0 150 84 1425 <0.05 <0.05 0.047 8 February 4.0 125 97 1425 <0.05 <0.05 0.047 8 March 4.0 125 100 1425 <0.05 <0.05 0.047 9 April 4.0 125 108 1425 <0.05 <0.05 0.047 15 May 4.0 150 84 1425 <0.05 <0.05 0.047 14 June 4.0 150 123 1425 <0.05 <0.05 0.047 20 July 4.0 175 158 1425 <0.05 <0.05 0.047 21 August 4.0 175 148 1425 <0.05 <0.05 0.047 22 September 4.0 225 154 1425 <0.05 <0.05 0.047 21 October 4.0 175 151 1425 <0.05 <0.05 0.047 18 November 4.0 250 108 1425 <0.05 <0.05 0.047 13 December 4.0 125 111 1425 <0.05 <0.05 0.047 11 Jan. - Dec. 4.0 250 - 1425 <0.05 - 0.047 180 Per Part III.E of the NPDES permit: "WET testing shall be performed twice per year at Outfall 101: once per year when oxidizing biocides are being used, and once per year when non-oxidizing biocides are being used."

Outfall 101: Toxicity was sampled June 6-11, 2021 during Towerbrom 960 treatment.

Test Results: Pimephales promelas : IC25 >100%

Ceriodaphnia dubia : IC25 > 100%

Outfall 110: There has been no discharge from Outfall 110 January - December 2021.

• Maximum treatment duration is listed individually per system: ERCW A, ERCW, B and RCW.

NOTE: Per Part I.3.b.3) of the NPDES permit effective August 1, 2020: "The method detection level (MDL) for TRC shall not exceed 0.05 mg/L unless the permittee demonstrates that its MDL is higher."