ML19344B154

LER 80-051/03L-0:on 800717,during Mode 1 Operation,Core a Protection Calculator Failure Alarm Was Received.Cause Not Determined.Calculator Reinitiated & All Failure Indications Returned to Normal.Bypasses Removed

ML19344B154
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/15/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344B148	List: ML19344B147 ML19344B149 ML19344B154 ML19344B157
References
LER-80-051-03L, LER-80-51-3L, NUDOCS 8008250653
Download: ML19344B154 (1)

Text

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HE,oHToaTE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES to FTrri i During Mode One Operation, "A' Core Protection Calculator (CPC) failure i o 2 i alarm was received. The DNBR/LPD trios were bvoassed on "A" CPC clacingI

[U3] I the Reactor trip logic in a 2 out of 3 trip seauence. CPC channels "B".I pis,i "C", and "D" remained operable. Similar to LER's 50-368/79-045,and I o s 1 79-074. Reportable per Tech Spec. 6.9.1.9b. I l o l i _I I I o a l I

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og 43 44 CAUSE OESCR.PTION AND CORRECflVE ACTIONS h gi Exact cause of CPC "A" failure could not be dete mined. The CPC was re i mI initialized and all failure indications returned to normal. The CPC "A"I li i 21 1 bvnascoe warp rpmnved and the channpl roturned tn carvico. I i 3 I I LLLtJ l I

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