05000255/LER-1979-011-03, /03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced

/03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced

ML18043A581
Person / Time
Site:	Palisades
Issue date:	03/26/1979
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A580	List: 05000255/LER-1979-011, Forwards LER 79-011/03L-0 05000255/LER-1979-011-03, /03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced
References
LER-79-011-03L, LER-79-11-3L, NUDOCS 7903290138
Download: ML18043A581 (1)

LER-1979-011, /03L-0 on 790227:primary Data Logger Was Inoperable.Caused by Multiplexer Failure at Computer Input/ Output.Faulty Relays Replaced

Event date:
Report date:
2551979011R03 - NRC Website

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!:VENT DESCRIPTION AND PROBABLE CONSEQUENCES @.

I Duri.'lg normal plant operation~ 'the primary data logger became inoperable, 1 1 such that.no incore alarms could not be printed out.. Pow:er re_duction

• 1 I was commenced* as* required by TS 3.il.e.

I I Tiie "ampp+e... was r<>sto.,.ed to an onerable status Within one.hour of J

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No threat to public health or safety 1

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The condition was caused by'1!mult1plexer fa.ilure at the computer 1npu I

I OJI] f output; specifically, multiplexer I".elays had failed.,The relays were 1

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I replaced, and the computer was restored to service.

No fUfther action L..:..L.:U I

OJ)) I is contemplated at this time.

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LOCATION OF RELEASE @)

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'4 45 80 PERSONNEL EX,OSURES t.::1, NUMBER t::::I TY'! t.:::\\ DESCRl~QN ~

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