ML19350A955

LER 81-020/03L-0:on 810213,during Normal Operation,Hpci Controller Indicated Possible Controller Failure.Sys Declared Inoperable.Caused by Failure of Two Transistors in Amplifier.Controller Replaced & Returned to Svc

ML19350A955
Person / Time
Site:	FitzPatrick
Issue date:	03/09/1981
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
ML19350A953	List: ML19350A952 ML19350A955
References
LER-81-020-03L, LER-81-20-3L, NUDOCS 8103170651
Download: ML19350A955 (1)

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controller indi.:ated possible failure of the controller. The system was declared 1 go!,l inoperable and the surveillance required by TS 3.5.C Initiated. No sienificant I I

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j,i:  ; lThe controller was replaced with a spare. Subsequent investigation revealed that in the amotifier. I g i ailure f resulted from failure of two (2) transistors (Q8 and q9) f

, ,, ,7, il nvestigation also revealed that the controller failure noted in LER 81-010 was of i,i3j {a different nature. The HPCI System was returned to service in a fullv ocerable Ii ,4 i Istatus within three (3) bours. No additional action is recuired. .3 e e

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