ML18043A581

LER 79-011/03L-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: ML18043A579 ML18043A581
References
LER-79-011-03L, LER-79-11-3L, NUDOCS 7903290138
Download: ML18043A581 (1)

Text

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Palisades NRCFORM3&6 U, S. NUCLEAR REGULATORY COMMISSION

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LICENSEE EVENT REPORT CONTROL BLOCK:

1 I I I  ! I I 10 II ll'LEASE Pl'llNT OR TYl'E ALL REQUIRED INFORMATION!

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UCENSE NUMBER 25 211 ~lCENSE TYPE JO 57 CAT 58 CON'T cmJs  :;~~~ l.lJ(DI O I 510 I b I Of2 I 51 5K]IO 12 I 2 17 I 7 !9 !@Io 13 ! 2 16 I 71 91@

1 sa 61' DOCKET NUMBl!R . 68 69 EVENT DATE ' 7* 75 REl'ORT DATE so

!:VENT DESCRIPTION AND PROBABLE CONSEQUENCES @. ,. . *

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

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[]JI] I was commenced* as* required by TS 3.il.e. I

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

[ill] I commencing the power reduction. No threat to public health or safety 1 l))IJ existed.

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. Sl!oUENTlAL OCCURRENC! REl'Ol'IT REVISION*

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The condition was caused by'1!mult1plexer fa.ilure at the computer 1npu OE I I OJI] f output; specifically, multiplexer I".elays had failed. ,The relays were 1

~ I replaced, and the computer was restored to service. No fUfther action L..:..L.:U I OJ)) I is contemplated at this time. I IIm 7 B 9 00 FACl~ITY ~ METMOD OF , /,;:;\

STATUS '"'OWER OTNE"STATUS ~ DISCCIVERY DISCOVERY D~~ll'TlON 15' EDIJ ~@ I 1 lo Io I@! N/A I l!J@)! Operator observa-cion I

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NUMBER DESl;Rl/P,'!;ION~

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7 8 s 11 12 ao LqsS OF CR OAMAGE TO FACILITY TYPE OESCRll'TlON l4J'

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