ML19257D839

LER 79-050/03L-0:on 791228,during Steady State Operation, Channel B Axial Flux Offset Read Higher than Other Channels. Caused by Detector or Integral Detector Cable Vibration

ML19257D839
Person / Time
Site:	Calvert Cliffs
Issue date:	01/25/1980
From:	Lagiewski J, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257D837	List: ML19257D836 ML19257D839
References
LER-79-050-03L-01, LER-79-50-3L-1, NUDOCS 8002060586
Download: ML19257D839 (1)

Text

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s R 60 61 DOCKET NUM8ER 68 69 EV ENT D ATE 14 75 REPORT DATE 80 EVENT DESCRIPT1oN AND PROB ABLE CONSEQUENCES h o 2 Lg aing steady state operation, it was noticed that Channel B Axial Flux l F5Til l Offset was reac'ing hicher than the other channels. At 0850. Channel B l F5TT11 Axial Flux Offset, thermal maroin/ low pressure and hich oower trie units we:e 1 o s I bypassed for troubleshooting Channel B Axial Flux Offset, per T.S. 3.3-1 I o te action 2. Channel B high power, thennal margin / low oressure and axial flux I o 7 I offset were returned to service at 1345. Three redundant channels remained I o e i operable throuahout this event. LER 79-44 (U-2) describes a similar event. I So*E" ie

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w.,EO=,og.ane, J. S. Laciewski/P. G. Rizzo . ways, (301)234-7942/7986 i,