05000293/LER-1979-049-03, /03L-0:on 791129,after Completing Surveillance Testing of Diesel Generator A,Auxiliary Trip Relay Annunciator Did Not Clear.Cause Undetermined.Phase a Target & Differential Lockout Reset

/03L-0:on 791129,after Completing Surveillance Testing of Diesel Generator A,Auxiliary Trip Relay Annunciator Did Not Clear.Cause Undetermined.Phase a Target & Differential Lockout Reset

ML19256G552
Person / Time
Site:	Pilgrim
Issue date:	12/28/1979
From:	Mathis C BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19256G551	List: 05000293/LER-1979-049, Forwards LER 79-049/03L-0 05000293/LER-1979-049-03, /03L-0:on 791129,after Completing Surveillance Testing of Diesel Generator A,Auxiliary Trip Relay Annunciator Did Not Clear.Cause Undetermined.Phase a Target & Differential Lockout Reset
References
LER-79-049-03L, LER-79-49-3L, NUDOCS 7912310454
Download: ML19256G552 (1)

LER-1979-049, /03L-0:on 791129,after Completing Surveillance Testing of Diesel Generator A,Auxiliary Trip Relay Annunciator Did Not Clear.Cause Undetermined.Phase a Target & Differential Lockout Reset

Event date:
Report date:
2931979049R03 - NRC Website

text

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74

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2 l On November 29. 1979. after comnioring vnnrino en m o411,nnn e.,ee4n3 nc "s" 94negl l

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declared inonerable and rodundant enceing cnnducenA in,cnnrA,nco "4*k I

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l Technical Specification 3.9.B.4 Public Health and Safety were not affected.

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unable to find any electrical faults.

The phase "A" target and Differential I

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Lock Out were reset and diesel generator operability test nerformed with no 3

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NAME OF PREPARER