GO2-22-055, 2021 Annual Environmental Operating Report

2021 Annual Environmental Operating Report

ML22110A120
Person / Time
Site:	Columbia
Issue date:	04/20/2022
From:	Vance S Energy Northwest
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GO2-22-055
Download: ML22110A120 (4)

Text

Scott A. Vance ENERGY Vice President, Corporate Governance and General Counsel P.O. Box 968, MD PE13 Richland, WA 99352- 0968 NORTHWEST Ph. 509.377-4650 l F. 509.372.5330 savance@energy-northwest.com

April 20, 2022 GO2-22-055

U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 2021 ANNUAL ENVIRONMENTAL OPERATING REPORT

Dear Sir or Madam:

This letter is submitted pursuant to Section 5.4.1 of the Columbia Generating Station (CGS)

Environmental Protection Plan (EPP), Appendix B to the Facility Operating License No. NPF-21, which requires Energy Northwest (EN) to submit an Annual Operating Report for the EPP to the Nuclear Regulatory Commission (NRC) for the prior calendar year.

There were no EPP noncompliances in 2021 and there were no changes in station design or operation, tests, and experiments that involved an unreviewed environmental question.

On September 14, 2021 Energy Northwest sent a National Pollutant Discharge Elimination System (NPDES) 5-day noncompliance report to the Energy Facility Site Evaluation Council (EFSEC) for the potential discharge of no more than eight gallons of silicone-based lubricating fluid into Plant Service Water and subsequently the Circulating Water Basin and Columbia River via Columbia Generating Station Outfall 001. NRC notification EN 55425 pursuant to 10 CFR 50.72(b)(2)(xi) was completed on August 23, 2021.

A summary of the effluent data reported on the discharge monitoring reports to EFSEC are provided in the Attachment.

There are no commitments being made to the NRC by this letter. If you have any questions or require additional information, please contact Mr. D. Mehinagic at (509) 372-5768.

GO2-22-055 Page 2 of 2

Executed on the _____ day of ___________, 20th April 2022.

Respectfully,

[;ii Recoverable Sign atu re X Vance.,, Scott A....

Fin al Approver

Si g n ed b y: Va n ce, Sco tt A.

Scott A. Vance Vice President, Corporate Governance and General Counsel

Attachment:

Summary of Discharge Monitoring Reports

cc: NRC Region IV Administrator NRC NRR Project Manager NRC Sr. Resident Inspector CD Sonada - BPA/1399

SAV/ lw ATTACHMENT

Summary of Discharge Monitoring Report 2021 ANNUAL ENVIRONMENTAL OPERATING REPORT Page 1 of 1

COLUMBIA GENERATING STATION 2021 COOLING WATER BLOWDOWN DISCHARGES

Total Maximum Discharge Volume (millions Month Days of pH Residual Total (ug/L) of gallons/day)

Discharge Halogen Low High Copper (c) Chromium(d) Zinc (e) Average (a) Maximum (b)(mg/L)

Jan 31 8.0 8.6 <0.1 10.8 3.0 15.4 2.3 2.4 Feb 28 8.1 8.6 <0.1 12 1.1 15.9 2.0 2.4 Mar 31 8.2 8.6 <0.1 9 1 21.3 2.1 2.8 Apr 30 8.1 8.6 <0.1 7.6 1 14 2.5 2.6 May 31 7.0 8.4 <0.1 9.3 1.6 15.7 1.4 5.0 Jun 30 7.2 8.8 <0.1 22.3 <1 38.2 2.1 4.9 Jul 31 6.8 8.3 <0.1 15.7 1.1 22.4 3.6 5.3 Aug 31 7.2 8.7 <0.1 15 2.2 13.3 3.7 5.3 Sep 30 8.1 8.7 <0.1 14.5 2.8 21.2 2.5 2.5 Oct 31 7.9 8.7 <0.1 14.2 1.3 15.2 2.3 2.7 Nov 30 7.9 8.6 <0.1 19 1.8 36.9 2.3 2.8 Dec 31 7.7 8.7 <0.1 31 10.0* 47 2.0 2.7 Permit 0.1 (c) (d) (e) 5.6 9.4 Limit Acute toxicity testing of circulating water blowdown was completed quarterly during 2021.

The bioassay results were favorable with no acute toxicity detected in the test concentration representing the acute critical effluent concentration (ACEC). The ACEC equals 11% effluent.

• During the month of December, two samples for chromium were taken for an average concentration of 6.2 ug/L.

(a) Average daily discharge for the month (b) Maximum daily discharge for the month (c) No permit limit for copper (d) Chromium limits are: 8.2 ug/L monthly average, 16.4 ug/L daily maximum (e) Zinc limits are: 53 ug/L monthly average, 107 ug/L daily maximum