ML19242A856

LER 79-043/03L-0 on 790718:discharge Check Valve Associated W/Electric Motor Driven Fire Pump Failed to Properly Reseat Following Pump Shutdown.Caused by Small Pebble Between Valve Clapper & Valve Body.Returned to Svc

ML19242A856
Person / Time
Site:	FitzPatrick
Issue date:	08/03/1979
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19242A850	List: ML19242A849 ML19242A856
References
LER-79-043-03L, LER-79-43-3L, NUDOCS 7908060471
Download: ML19242A856 (2)

Text

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POWER AUTIf0RITY OF TIIE STATE OF NEW YORK

, . JAMES A. FIT 2 PATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACilMENT TO LER 79-043/03L-0 Page 1 of 1 haile in a cold shutdown condition during the conduct of Fire Pump Perfermance Testing for a representative of the Insurance Underwriters, a discharge check valve associated with the electric motur driven fire pump failed to proper'- rescat follow-ing shutdown of the pump. This necessitated isolating the pump and declaring it in-operable. The diesel engine driven fire pump was immediately verified operable in accordance with the requirements of Technical Specifications Appendix A, Paragraph 3.12.A.1.c.

Since the redundant 1003 capacity diesel driven pump was operabic, the event did not represent any significant ha:a.o to the public health and safety.

Disassembly of the valve revealed a small pebbic between the valve clapper and valve body which restricted full closure of the vt1ve. The stone was removed, the va .c reassembled, and the pump retested with satis factory results and declared fully operable approximately eleven hours after discovc f of the deficiency. Further testing and flushing of the system on J"ly 24, 1979, in the presence of tha insurance undeneriter's representative, again demonstrated satisfactory performance and did not reveal the presence of any additional dirt, stones, or other debris in the system.

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