05000333/LER-1978-098-03, /03L-0 on 781205:emergency Diesel Generator a Tripped When Being Paralleled to Bus.Caused by Misadjustment of Engine Governor After Extended Maintenance Period

/03L-0 on 781205:emergency Diesel Generator a Tripped When Being Paralleled to Bus.Caused by Misadjustment of Engine Governor After Extended Maintenance Period

ML19267A272
Person / Time
Site:	FitzPatrick
Issue date:	12/27/1978
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19263A865	List: 05000333/LER-1978-098, Forwards LER 78-098/03L-0 05000333/LER-1978-098-03, /03L-0 on 781205:emergency Diesel Generator a Tripped When Being Paralleled to Bus.Caused by Misadjustment of Engine Governor After Extended Maintenance Period
References
LER-78-098-03L, LER-78-98-3L, NUDOCS 7901030170
Download: ML19267A272 (2)

LER-1978-098, /03L-0 on 781205:emergency Diesel Generator a Tripped When Being Paralleled to Bus.Caused by Misadjustment of Engine Governor After Extended Maintenance Period

Event date:
Report date:
3331978098R03 - NRC Website

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'hTTACHMENT TO LER-78-098/03L-0 Page 1

of 1

At the conclusion of the 1978 Refueling anni bbintenance Outage, while preparing for plant startup, Emergency Diesel Generator (ET')

"A" tripped when being paralleled to the bus. The EDG was being opera.d in accordance with Operations Surveillance Test F-ST-9B titled EDG Full Load Test in order to satisfy the requirements of Technical Specification Appendix A, Paragraph 4.9.B.1.

The cause of the trip was determined to be misadjustment of the engine governor after an extended maintenance period. The governor would not allow proper loading of the Engine-Generator in parallel with reserve (off site) power. Adjustment of the governor was completed and surveillance test F-ST-9B was completed with satisfactory results, approximately three (3) hours later.

No further corrective action is contemplated since the surveillance test correctly performed its function of detecting this problem prior to startup of the reactor.