ML19254E296

LER 79-075/03X-1:on 790822,during Mode 1 Operation,Data Link from Control Element Assembly Cluster to B Core Protection Computer Dropped,Resulting in B Channel Tripping.Caused by Failed Optical Amplifier.Data Link Was Repaired

ML19254E296
Person / Time
Site:	Arkansas Nuclear
Issue date:	10/25/1979
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19254E288	List: ML19254E287 ML19254E296 ML19254E299 ML19254E301 ML19254E305
References
LER-79-075-03X, LER-79-75-3X, NUDOCS 7910310424
Download: ML19254E296 (1)

Text

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Update Report - Previous Report Date September 12, 1979

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E VENT D ATE 'd 'n REPOMT O AT E At EVENT DESCR6PT80N ANO PROBABLE CONSECUENCES IO l211 During Mode 1 operation, the a link from CEAC #1 to the "B" CPC i

10131 1 drnonad a bit causina an inaccurate output indication, resulting in the lo1 1I "B" CPC channel trippina. The data link failed in the conservative i fBTn i direction and the remaining CEAC data links were operable. ,

O s t There have been no similar occurrences.

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> a l The data link outout error was caused by a failed ootical amplifier. Thet data link was repaired and the "B" CPC returned to service within one

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