ML20084L346

Ro:On 740225,26,0305 & 23,chlorine Residual Concentrations in Discharge Bay Exceeded Tech Spec Limit of 0.10 Ppm.Caused by Final Flush of Pump & Piping Being Discharged Directly Into Bay.Tech Spec Change Requested

ML20084L346
Person / Time
Site:	Quad Cities
Issue date:	03/26/1974
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	Oleary J US ATOMIC ENERGY COMMISSION (AEC)
References
NJK-74-10, NUDOCS 8305200685
Download: ML20084L346 (2)

Text

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Ouad-C. encrating Sttion Post Offic ox 216 ~

Cordova. Illinois 61242 -

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March 26, 1974 r

Mr. John F. O' Leary, Director Directorate of Licensing Regulation U. S. Atomic Energy Commission Washington, D. C. 20545

Reference:

Quad-Cities Nuclear Power Station Docket No. 50-254 and 50-265 DPR-29 and 30, Appendix B Section 1.1 and 3.1.A.

Dear Mr. O' Leary:

The purpose of this letter is to report chlorine residual concentrations in the discharge bay which exceeded the liciting condition for operation specified in Section 1.1.A, Appendix B, Non-Radiological Technical Specifications. The limit of 0.10 ppm free and combined chlorine residuals in the discharge bay was exceeded on several occasions within the past 30 days.

Indicated below are the dates the limit was exceeded and the maximum concentration detected.

Date Maximum Conc. (pom) 2-25-74 0.32 2-26-74 0.34 3-5-74 0.20 3-23-74 0.51 The 0.51 ppm was measured in the discharge bay when only 4 circulating water pumps were running.

During this 30 day period, the hypochlorination system was out of service 9 days. Otherwise hypochlorination was done three times a day with the hypochlorite flow manually set at 5 gallons per minute. Each comolete chlorination cycle was 40 minutes in duration. The limit of 0.10 ppm total chlorine residual is not exceeded until the end of chlorination. We f

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O Mr. J. F. O' Leary March 26, 1974 feel this is due to the final flush of the pump and piping being discharged directly into the discharge bay.

It should be noted that the concentrations reported above are within the limits of Technical Specifications proposed in Mr. J. Abel's letter of November 14, 1973. Pending your review of this change and resolution of questions raised b?

your staff concerning it, we have requested a temporary change to this section of the specifications by B. Stephenson's letter of February 19, 1974. -

Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STATION f (*~

N. J. Kalivianakis Station Superintendent NJK/lk cc: Regior.al Director Directorate of Regulatory Operations-Region III

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