ML20064E461

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Reportable Occurence 78-058/04P on 781105-08:during Plant Shutdown,Reactor Plant River Water & Turbine Plant River Water Header Chlorination Levels Exceeded Allowable Value, Due to Abnormal Lineup
ML20064E461
Person / Time
Site: Beaver Valley
Issue date: 11/09/1978
From: Werling J
DUQUESNE LIGHT CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
BVPS-JAW:608, NUDOCS 7811170214
Download: ML20064E461 (2)


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SIu'r$dEe"n"n'syNania DUQUESNE LICllT COMPANY 15:1s Beaver Valley Power Station Post Office Box 4 Shippingport, PA 15077 "I-November 9,1978 BVPS: JAW:608 Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 LER 78-58/04P

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Mr. B. H. Grier, Director of Regulation United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

In accordance with Environmental Technical Specifications 5.6.2.A and 2.3.1, the following occurrence is reported.

The report was discussed via telephone with Dr. M. Shanbaky at 0815 hours0.00943 days <br />0.226 hours <br />0.00135 weeks <br />3.101075e-4 months <br /> on November 9, 1978.

During the current plant shutdown, the reactor plant river water (RPRW) headers and the turbine plant river water header'were being chlorinated at a

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dose rate of 250 pounds per day for a total of 45 minutes. On November 5, the turbine plant river water system was secured. No chlorination was performed on November 5 and 6 due to an abnormal lineup. On November 7, chlorination was performed on the "B" RPRW header at a dosc rate of 250 pounds per day for 15 minutes. Tbc maximum free chlorine residual was 0.24 PPM.

On November 8 at 1250 hours0.0145 days <br />0.347 hours <br />0.00207 weeks <br />4.75625e-4 months <br />, chlorination was performed on the "B" RPRW header at a dose rate of 250 pounds per day for 15 minutes. Free chlorine residuals measured at the station outfall structure exceeded the allowable value of 0.5 PPM. At 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br />, the free chlorine residuals reached a maximum of 0.6 PPM and, at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br />, it returned to 0.0.

Any additional information will be included in the follow-up report.

Very truly yours, 4

J. A. Werling l

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Mr. B.11. Grier November 9, 1978 BVPS: JAW:608 Page 2 cc: Director, Office of Management Information & Program Control"~

United States Nuc1 car Regulatory Commission Washington, D. C.

20555 E. A. Reeves, BVPS Licensing Project Manager United States Nuclear Regulatory Commission Washington, D. C.

20555 W. J. Raymond, Nuclear Regulatory Commission, King of Prussia, PA G. A. Olson, Secretary, Prime Mover's Committee - EEI i

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