05000368/LER-1980-066-03, /03L-0:on 800811,during Mode 1 operation,hi-hi Containment Pressure Trip Was Received on Plant Protective Sys Channel D.Other Channels Reported Normal Pressures. Caused by Power Supply Failure on Bistable Card

/03L-0:on 800811,during Mode 1 operation,hi-hi Containment Pressure Trip Was Received on Plant Protective Sys Channel D.Other Channels Reported Normal Pressures. Caused by Power Supply Failure on Bistable Card

ML19344F436
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/09/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344F431	List: 05000368/LER-1980-066, Forwards LER 80-066/03L-0 05000368/LER-1980-066-03, /03L-0:on 800811,during Mode 1 operation,hi-hi Containment Pressure Trip Was Received on Plant Protective Sys Channel D.Other Channels Reported Normal Pressures. Caused by Power Supply Failure on Bistable Card
References
LER-80-066-03L, LER-80-66-3L, NUDOCS 8009150271
Download: ML19344F436 (1)

LER-1980-066, /03L-0:on 800811,during Mode 1 operation,hi-hi Containment Pressure Trip Was Received on Plant Protective Sys Channel D.Other Channels Reported Normal Pressures. Caused by Power Supply Failure on Bistable Card

Event date:
Report date:
3681980066R03 - NRC Website

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EVENT DESCRIPTION AND PRosABLE CONSECUENCES to -

i o o i I-During Mode 1 operationmHI-HF containment pressure trip was received i

r5Tn I on'PPS channel "D".

PPS channels "A", "B" and "C" HI-HI containment i

uuaj i pressurswere verified to be normal.

Channel "D" HI-HI containment i o t s i 1-pressure was placed in bypass leaving the trip logic in a 2 out of 3 i

F5Tel I trip secuence. This occurrence is similar to LER's 50-368/79-014 &

i ie oi I 80-052.

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CAUSE DESCRIPfl0N ANO CCRREC flVE ACTIONS h r,12i i Investiaation revealed the power upply on the bistable card for HI-HI i

t,i1i containment pressure for PPS channel "D" had failed.

The card was re-i i,;2, I placed and a functional test ws satisfactorily performed.

Channel "D"

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