05000368/LER-1981-018-03, During Mode 6 Operation, Emergency Diesel Generator 2 Received Lockout During Load Rejection Test.Caused by Antimonitoring Relay Holding Coil Adjustment Found Out of Tolerance.Adjustments Made

During Mode 6 Operation, Emergency Diesel Generator 2 Received Lockout During Load Rejection Test.Caused by Antimonitoring Relay Holding Coil Adjustment Found Out of Tolerance.Adjustments Made

ML20009E893
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/26/1981
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20009E887	List:
References
LER-81-018-03X, NUDOCS 8107280526
Download: ML20009E893 (1)

LER-1981-018, During Mode 6 Operation, Emergency Diesel Generator 2 Received Lockout During Load Rejection Test.Caused by Antimonitoring Relay Holding Coil Adjustment Found Out of Tolerance.Adjustments Made

Event date:
Report date:
3681981018R03 - NRC Website

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e REVISED REPORT - PREVIOUS REPORT DATE 5-27-81 Nnc FORM 3E,4 U. 5. NUCLE AR REGULATORY COMMIS$60N LICENSEE EVENT REPORT EXHIBIT A CONTROL SLOCK: l l l l l l !h (PLE ASE 8'RINT OR TYPE ALL REOutRED INFORMATIONI i

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EVENT DESCRIPTION AND PROS ABLE CONSEQUENCES h'a l During Mode 6 operation, Emergency Diesel Generator (EDG) #2 received a i o

i generator lockout during the load rejection test portion of the 18 month i o 3 i surveillance. This is a non-valid failure as defined by Reg. Guide 1.108L o.

n s i Rev.1, Position C.2.e(2), as the anti-motoring relay is by-passed on a i i SIAS signal. There has beer, mie failure in the last 100 valid tests. The o o I redundant EDG and offsite power was available meeting requirements of I

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I T.S. 3.8.1.2..

Similar to LER 50-368/81-016.

Reportable per T.S. 4.8.1.153 o.

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3J 34 35 36 32 40 48 41 43 44 el CAUSE OESCA.PTION AND CORRECitVE ACTIONS h l Thic anti-mntnring relay hniding enil adiustment was found to be out of I i o i tolerance. This adjustment is normally considered to be a " factory settipg".

rrTT) i Ad.iustments were made and EDG load re.iection test successfully completed.:

i The procedure was revised to include relay checks.

Similar relays on i

i 2 i EDG #1 and Main Generator are being checked utilizing revised procedure.

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