ML19241C118

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Submits Special Rept Re Groundwater Leakage Discovered 30 Ft South of Intake Structure.Caused by Expansion Joint in Fire Line.Area Around Leak Will Be Excavated & Necessary Repairs Completed
ML19241C118
Person / Time
Site: Beaver Valley
Issue date: 07/18/1979
From: Werling J
DUQUESNE LIGHT CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
BVPS:JAW:687, NUDOCS 7907270229
Download: ML19241C118 (2)


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Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Special Report 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 Technical Specifications 3.7.14.1 and 6.9.2, the following Special Report is submitted. The report was discussed with Mr. D. A. Beckman ot 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> on July 17, 1979.

On July 17, 19 at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br />, water was discovered leaking out of the ground at an area t'airty feet south of the intake structure. At 1441 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.483005e-4 months <br />, tha diesel driver fire pump was secured because of pump overheating due to pump rur'ut. At that Line the water leak stopped and it was dete" mined one of the redundant fire suppcassion headers was the source of the leak. At 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />, the leaking header wa' isclated and fire system pressure was restored at 1512 hours0.0175 days <br />0.42 hours <br />0.0025 weeks <br />5.75316e-4 months <br />.

Normai systes presv re was verified around the fire suppression system loop and all air -as vented from the system. The diesel driven fire pump operating surveillance test was performed successfully at 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br /> on July 18 and the pump vs. -e urned to service.

The source of the ic2kage is apparently an expansion joint in the fire line.

The area around the leak will be euca'.ated and the necessary repairs will be comple ed.

This letter is intended to serve as the 14-day followup report. ..awev e r , if additional information becomes arailable as a result of the repairs, a followup report sill bc issued.

Very truly yours, i

y J. A. Werling O

~o07270- 4 Superintendent Tg 790727 D 9 -

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d s Mr. B. H. Crier July 18, 1979 BVPS: JAW:687 Page 2 cc: Director Of Management & Program Analysis United States Nuclear Regulatory Co= mission Washington, D. C. 20555 D. L. Wigginton, BVPS Licensing Project Manager - '

United States Nuclear Regulatory Commission Washington, D. C. 20555 D. A. Beckman, Nuclear Regulatory Commission, King of Prussia, PA G. A. Olson, Secretary, Prime Movers Committee - EEI

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