05000368/LER-1980-093-03, /03L-0:on 801220,emergency Diesel Generator 2 Tripped on Reverse Power on Breaker Closure.Caused by Operator Applying Manual Generator Load Increase Too Slowly. Operators Instructed on Importance of Applying Load Quickly

/03L-0:on 801220,emergency Diesel Generator 2 Tripped on Reverse Power on Breaker Closure.Caused by Operator Applying Manual Generator Load Increase Too Slowly. Operators Instructed on Importance of Applying Load Quickly

ML20002D327
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/15/1981
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20002D324	List: 05000368/LER-1980-093, Forwards LER 80-093/03L-0 05000368/LER-1980-093-03, /03L-0:on 801220,emergency Diesel Generator 2 Tripped on Reverse Power on Breaker Closure.Caused by Operator Applying Manual Generator Load Increase Too Slowly. Operators Instructed on Importance of Applying Load Quickly
References
LER-80-093-03L, LER-80-93-3L, NUDOCS 8101200406
Download: ML20002D327 (1)

LER-1980-093, /03L-0:on 801220,emergency Diesel Generator 2 Tripped on Reverse Power on Breaker Closure.Caused by Operator Applying Manual Generator Load Increase Too Slowly. Operators Instructed on Importance of Applying Load Quickly

Event date:
Report date:
3681980093R03 - NRC Website

text

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s FS e<FroMiDATE 80 EVENT DESCRIPTION AND PFORABLE CONSEQUENCES h guring Mode 3 operation, at approximately 25 minutes following a manual i

noi2i treactor trip (See LER 50-368/80-091), while transfering the 4160 volt ESF o 2 t o !. i Eus, 2A4, from Emergency Diesel Generator (EDG) power to Bus 2A2, EDG 32 i t o isi aripped on reverse power on breaker closure.

EDG =1 remained available.

I ic is i fio similar occurrences.

This non-valid failure (as defined in Reg. Guide i lo 'il 11.108 Rev.1, Reculatory Position C.2.e(2)) is reported per T.S. 4.8.1.1.31 i o.. i pursuant to 6.9.1.9.b.

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CAUSE DESCR=PTION AND CCRREC rlVE ACTIONS m iWhile returning tne unit eledtrical alignment to nonnal, a reverse power,

s i ii j I EDG trio occurred due to a manual generator load increase by the operatori i

m i being applied tco slowly. The EDG was returned to service within 5 min i,,3i i utes of the trip.

The importance of applying load quickly to the EDG i

m i during the evolution was discussed with.all operators.

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