ML19344B333

LER 80-017/03L-0:on 800618,during Surveillance Testing of HPCI Steam Line Low Pressure Instruments,Hpci Steam Supply Was Isolated Leaving Sys Inoperable.Probably Caused by Failure of Pressure Switch HPCI-PS-68B

ML19344B333
Person / Time
Site:	Cooper
Issue date:	07/16/1980
From:	Converse W NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344B330	List: ML19344B329 ML19344B333
References
LER-80-017-03L, LER-80-17-3L, NUDOCS 8008260628
Download: ML19344B333 (1)

Text

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EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h f5TTI IDurina surveillance testina of HPCI stane line low nreanura innerumance- ch. upc7 i g isteam supply was isolated leaving the system inoperable. All redundant core cooling 1 F5Tn Isystems were operable. There were no significant occurrences resulting from this I fo isl levent and there were no adverse effects on the public health and safety. This event I o e lis repetitive. I l

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l i l o l Rhe probable cause of the occurrence van the fnilure of MPCI-PS-68B. The nromnure l tililIswitch is manufactured by Barksdale, Model B2T-M12SS. The switch has been renlaced.1 gIThe failure of the switch appears to be sticking contacts. I I

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