05000317/LER-1979-049-03, /03L-0:on 790924,loop Isolation Valve SI-617 Failed to Operate When Motor Operator Received Open Signal. Caused by Contact Misalignment of Movable Contactor. Contactor Realigned & Tested

/03L-0:on 790924,loop Isolation Valve SI-617 Failed to Operate When Motor Operator Received Open Signal. Caused by Contact Misalignment of Movable Contactor. Contactor Realigned & Tested

ML19209C679
Person / Time
Site:	Calvert Cliffs
Issue date:	10/12/1979
From:	Bauer E, Lagiewski J BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19209C674	List: 05000317/LER-1979-049, Forwards LER 79-049/03L-0 05000317/LER-1979-049-03, /03L-0:on 790924,loop Isolation Valve SI-617 Failed to Operate When Motor Operator Received Open Signal. Caused by Contact Misalignment of Movable Contactor. Contactor Realigned & Tested
References
LER-79-049-03L, LER-79-49-3L, NUDOCS 7910170209
Download: ML19209C679 (1)

LER-1979-049, /03L-0:on 790924,loop Isolation Valve SI-617 Failed to Operate When Motor Operator Received Open Signal. Caused by Contact Misalignment of Movable Contactor. Contactor Realigned & Tested

Event date:
Report date:
3171979049R03 - NRC Website

text

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LICENSEE EVENT REPORT

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60 61 DOCKET NUMB ER 68 69 EVENT DATg 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h lDuring the perforTnance of surveillance testing at 0340, auxiliary hich oressure 1

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l loop isolation valve (SI-617) failed to Cperate when its motor coerator received l

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lan Cpen signal. No other injection paths were incperable at the time. Tne valve 1

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o is Iwas retumed to service at 0410 on 9/24/79. LER 76-48 (U-1) describes a similar l

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o lInvestication shcwed that the valve motor was Mnf = +=e47 4n + = m a-ad e m Idue to a slicht contact misalicment of the movable contactor. Tne contact was 1

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Irealigned and tested. The state of electrical contacts is ceriodically surveyed I

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junder the preventive maintenance program.

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% POWER OTHER STATUS DISCO ' RY OISCOVERY OESCRIPTION NA l

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7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE D ESCRIPTION Im l

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8 9 11 12 LOSS OF CR OAMACE TO FACILITY TY'E D E SC RIPTION l Z lhl IM 1

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8 9 10 7 910170 cM NRC USE ONLY

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8 9 10 J. S. Laciewski/E. R. Bauer PHONEn(3Ol) 23407942/7917 2,

NAME OF PREPARER