RBG-27149, NPDES Noncompliance Notification:On 871210,estimated Flow of 500 Gpm of Cooling Water Discovered to Be Overflowing from Two Cooling Towers.No Specific Cause Identified.Third Cooling Tower Placed in Svc

NPDES Noncompliance Notification:On 871210,estimated Flow of 500 Gpm of Cooling Water Discovered to Be Overflowing from Two Cooling Towers.No Specific Cause Identified.Third Cooling Tower Placed in Svc

ML20237D589
Person / Time
Site:	River Bend
Issue date:	12/15/1987
From:	Odell W GULF STATES UTILITIES CO.
To:	Givens J LOUISIANA, STATE OF
References
RBG-27149, NUDOCS 8712240059
Download: ML20237D589 (2)

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W.i i)g GULF STATES UTILITIES COMPANY RIVER BEND STATION POST OFFICE BOX 220 ST. FR ANCISVILLE. LOUISIAt A 70775 ARE A CODE 604 635 6094 346 8651 December 15, 1987 RBG-27149 File No. G1.11.2 Mr. J. Dale Givens, Assistant Secretary Office of Water Resources Department of Envilu1 mental Quality Post Office Box 44091, apitol Station Baton Rouge, Iouisiana 70804-2733

Dear Mr. Givens:

I Water Discharge Permit No. 0409 1 NPDES Permit No. IA 0042731 River Bend Station - Unit 1

'Ihis letter is a written follow-up to the verbal notification' ade m by telephone on December 10, 1987 concerning an overflow of the River Bend Station cooling towers.

On 'the morning of December 10, 1987 a cmbined estimated flow of 500 gpn of cooling water was discovered to be overflowing frm two cooling towers. The overflow was corrected by placing a third cooling tower in service. The overflow lasted for about forty-five minutes resulting in the unauthorized discharge of approximately 22,500 gallons to Grants Bayou via Outfall 006. Outfall 006 is permitted for stormwater and previously nonitored discharges fran outfalls 003 and 004.

Analysis of the discharge at Outfall 006 showed a total Residual Chlorine of 0.3 mg/1, with no Free Available Chlorine, which is consistent with chlorine levels contributed by Outfall 004, the sewer plant effluent. No significant impact on the receiving waters is expected to have occurred as a result of this discharge.

No specific cause for the apparent hydraulic overload of the cooling towers could be identified. At the time of the overflow the plant was in the final stages of a refueling outage and a recurrence of the unauthorized discharge is not anticipated.

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

Sincerely, W. H. Odell Manager-Administration River Bend Nuclear Group cc: Mr. Myron Knudson, Director Water Management Division (6W)

U. S. Environmental Protection Agency, Region VI Allied Bank Tcrer , ,

1445 Ross Avenue Dallas, Texas 75202-2733 x

Capitol Regional Office ,

Water Pollution Control Division ,

11720 Airline Highway Baton Rouge, IA 70817-1720 U. S. Nuclear Regulatory Cmmission Document Control Desk Washington, D.C. 20555 U. S. Nuclear Regulatory Cmmission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 NRC Resident Inspector Post Office Bix 1051 St. Francisville, IA 70775-1051

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