GO2-21-062, 2020 Annual Environmental Operating Report

2020 Annual Environmental Operating Report

ML21119A213
Person / Time
Site:	Columbia
Issue date:	04/29/2021
From:	Vance S Energy Northwest
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GO2-21-062
Download: ML21119A213 (4)

Text

ENERGY Scott A. Vance Vice President, Corporate Governance and General Counsel P.O. Box 968, MD PE13 NORTHWEST Richland, WA 99352-0968 Ph. 509.377-4650 l F. 509.372.5330 savance@energy-northwest.com April 29, 2021 GO2-21-062 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 2020 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 2020 and there were no changes in station design or operation, tests, and experiments that involved an unreviewed environmental question.

No non-routine, non-radiological reports (per EPP Section 5.4.2) were required for 2020.

On March 10, 2017, the National Marine Fisheries Service (NMFS) issued an Endangered Species Act Section 7(a)(2) Biological Opinion for CGS requiring the submission of a fish entrainment characterization study to the NRC and the NMFS. EN provided the fish entrainment characterization final report to the State of Washington Energy Facility Site Evaluation Council (EFSEC), the NMFS, and the NRC on February 26, 2020.

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 Ms. F. Najera-Paxton at (509) 372-5660.

April 29, 2021 GO2-21-062 Page 2 of 2 Executed on the _____ April 29th day of ___________, 2021.

Respectfully,

~ Recoverable Signature X

Final Approver Signed by: Vance, Scott 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/np

ATTACHMENT Summary of Discharge Monitoring Reports

2020 ANNUAL ENVIRONMENTAL OPERATING REPORT Attachment Page 1 of 1 COLUMBIA GENERATING STATION 2020 COOLING WATER BLOWDOWN DISCHARGES Total Maximum Residual Total Discharge Volume Days of pH Halogen (ug/L) (millions of gallons/day)

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

Jan 31 7.2 8.3 <0.1 16 1.2 38 2.2 2.5 Feb 29 7.3 8.2 <0.1 12 <1 35 2.9 5.3 Mar 31 7.7 8.3 <0.1 12 <1 21 2.4 2.7 Apr 30 7.8 8.5 <0.1 16 1.1 38 2.3 2.4 May 31 7.9 8.6 <0.1 14 <1 29 2.4 2.6 Jun 30 7.6 8.6 <0.1 14 1.6 29 2.6 4.4 Jul 31 8.1 8.7 <0.1 9 <1 29 3.5 5.7 Aug 31 7.8 8.6 <0.1 7 <1 18 4.7 5.6 Sep 30 8.1 8.6 <0.1 8 1.2 13 3.1 5.2 Oct 31 7.8 8.5 <0.1 14 1.6 12 2.4 2.6 Nov 28 7.9 8.6 <0.1 11 2.6 12 2.3 4.3 Dec 31 8.3 8.7 <0.1 11 2.9 21 1.9 2.5 Permit Limit 0.1 (c) (d) (e) 5.6 9.4 Acute toxicity testing of circulating water blowdown was completed quarterly during 2020.

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.

(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