GO2-24-050, Annual Environmental Operating Report

Annual Environmental Operating Report

ML24121A268
Person / Time
Site:	Columbia
Issue date:	04/30/2024
From:	Vance S Energy Northwest
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
GO2-24-050
Download: ML24121A268 (1)

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 30, 2024 GO2-24-050

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

Subject:

COLUMBIA GENERATING STATION, DOCKET NO. 50-397 2023 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 Program (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 was no instance of EPP noncompliance and no change in station design or operation, tests, or experiments that involved an unreviewed environmental question.

On June 13, 2023, during Refueling and Maintenance Outage 26 (R26), maintenance activities on the Reactor Feedwater (RFW) Drive Turbine (DT) system resulted in the loss of Mobil DTE 732 turbine lubricating oil to the plant service water system (TSW). This event resulted in a nonroutine report pursuant to 10 CFR § 50.72(b)(2)(xi), which was completed on June 13, 2023: NRC Notification Event Number 56572.

A summary of the effluent data reported on the discharge monitoring reports to the Energy Facility Site Evaluation Council (EFSEC) is 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. P. Sample at (509) 377-2469.

Respectfully,

DocuSigned by:

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D58EB 90 55F2F498...

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



       



ATTACHMENT

Summary of Discharge Monitoring Report



       



2023 ANNUAL ENVIRONMENTAL OPERATING REPORT Page 1 of 1

COLUMBIA GENERATING STATION 2023 COOLING WATER BLOWDOWN DISCHARGES

Month Days of pH Total Maximum Total Discharge Volume Heat Load Discharge Residual (ug/L) (Millions of gallons/day) (kcal/day)

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

Jan 31 7.5 8.1 <0.1 19.9 2.3 16.9 2.7 2.7 -

Feb 28 7.6 8.3 <0.1 10.5 <1.0 12.0 2.7 2.7 -

Mar 31 7.6 8.2 <0.1 12.0 1.22 14.4 2.6 2.8 -

Apr 30 7.5 8.5 <0.1 13.5 1.6 18.4 2.8 3.1 -

May 31 7.3 8.4 <0.1 11.3 1.36 12.1 2.5 4.2 -

Jun 30 7.2 8.4 <0.1 14.3 0.84 35.0 1.8 5.0 -

July 31 7.3 8.3 <0.1 - <1.0 12.1 5.1 5.2 5.87e+008 Aug 31 7.6 8.5 <0.1 - 1.3 17.7 5.1 5.2 5.71e+008 Sep 30 7.4 8.6 <0.1 - 1.9 22.5 2.9 5.2 2.9e+008 Oct 31 7.4 8.5 <0.1 - 1.3 14.2 2.6 2.9 2.39e+008 Nov 30 7.6 8.2 <0.1 - 1.41 10.4 2.7 3.0 -

Dec 31 7.5 8.3 <0.1 - 3.8 23.8 2.7 3.1 -

Permit 6.5 9.0 0.1 (c) (d) (e) 5.6 9.4 1.27e+009 Limit Under the new NPDES permit effective July 1, 2023, quarterly whole effluent toxicity testing is not required and was not performed in the third and fourth quarters of 2023. The bioassay results for quarter 1 and 2 of 2023 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.

(f) Heat Load (June through October only) limit: 1.27e+009 kilocalories per day (kcal/day) monthly average. (Renewed NPDES Permit effective July 1, 2023, marking the start of heat load reporting.)