05000333/LER-1980-056-03, /03L-0:on 800610,during Normal Shutdown & Surveillance Testing,Emergency Diesel Generator C Tripped on High Circulating Current.Caused by Dirty or Defective Contact on Voltage Regulator Droop Switch

/03L-0:on 800610,during Normal Shutdown & Surveillance Testing,Emergency Diesel Generator C Tripped on High Circulating Current.Caused by Dirty or Defective Contact on Voltage Regulator Droop Switch

ML19320C066
Person / Time
Site:	FitzPatrick
Issue date:	07/10/1980
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
ML19320C059	List: 05000333/LER-1980-056, Forwards LER 80-056/03L-0 05000333/LER-1980-056-03, /03L-0:on 800610,during Normal Shutdown & Surveillance Testing,Emergency Diesel Generator C Tripped on High Circulating Current.Caused by Dirty or Defective Contact on Voltage Regulator Droop Switch
References
LER-80-056-03L, LER-80-56-3L, NUDOCS 8007150715
Download: ML19320C066 (1)

LER-1980-056, /03L-0:on 800610,during Normal Shutdown & Surveillance Testing,Emergency Diesel Generator C Tripped on High Circulating Current.Caused by Dirty or Defective Contact on Voltage Regulator Droop Switch

Event date:
Report date:
3331980056R03 - NRC Website

text

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$1 OOCK ET NUMS E R 68 69 EVENT QATE 74 75 REPORT QATE 60 EVENT DESCRIPT1CN AND PRC8ABLE CONSEQUENCES h la12l l INTERIM REPORT:

During normal shutdown and during surveillance testing, following l

,a,3, l routine preventive maintenance work,sEmergency Diesel Generator C tripped on high I

l o t a l I ci rculating current.

Subsequent tests could not duplicate the problem.

The other l

EDG system was operable meeting TS 3.9.D requirements.

The event did not represent l

lois] l io,,,l a signiflCant hazard to the public health and safety.

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ji ta;[ The cause of the trip is believed to be due to a dirty or defective contact on the l

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Investigation continues.

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,,,,, ; be submitted at a later date.

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