ML19208A309

LER 79-036/03L-0 on 790812:during Surveillance Test,Wide Range Nuclear Instrument Channel D Would Not Indicate Properly While in Calibr Mode.Apparently Caused by Bad Connection in Test & Power Cables.Connector Replaced

ML19208A309
Person / Time
Site:	Calvert Cliffs
Issue date:	09/11/1979
From:	Davis S, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19208A302	List: ML19208A301 ML19208A309
References
LER-79-036-03L, LER-79-36-3L, NUDOCS 7909130351
Download: ML19208A309 (1)

Text

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7 61 DOCK ET NUV8ER 69 74 EVENT DATE 75 REPORT OATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h 10121 At 0105 while oerformina a surveillance test it was discovered that wide rance I a 3 l nuclear instrument (WRNI) channel 0 would not indicate crocerly while in cali- t o ,

l bration mode. WRNI channel D was declared inoperable per T.S.3.3.1.1 action 2. l

[ o j sl lWRNI Channel D was returned to service at 0820. The three redundant URNI channels i o e ] re: ained cocrable during the event. This is not a recetitive occurrence. I O 7 l l

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44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTloNS i o l Disconnected " Test" and " Power" cables on drawer. Checked calibration nulses. I Ii ii i IEignals were nor: al. Reconnected cables and drawer functiened nreneriv. Annarent I i, i;j lcause was bad con 'ction. Cable connectors were inscected, found to be in cood I i 3 lconditicn. No cre/entive action is necessarv. I l i l 41 1 7 8 9 I 80 sTAWs sPCWER OTwfRSTATUS 5 OV RY OtsCOVERY OE50R?PTaON s

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