05000269/LER-1978-007-03, /03L-0:on 780314,Unit 2 Failed to Start.Caused by Field Flashing Breaker Failure.Breaker Failed Four Times Previously.Cause of Breaker Failure Not Determined. Monitoring & Investigation Will Continue

/03L-0:on 780314,Unit 2 Failed to Start.Caused by Field Flashing Breaker Failure.Breaker Failed Four Times Previously.Cause of Breaker Failure Not Determined. Monitoring & Investigation Will Continue

ML19312C237
Person / Time
Site:	Oconee
Issue date:	04/21/1978
From:	Ken Wilson DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19312C235	List: 05000269/LER-1978-007, Forwards LER 78-007/03L-0 & 78-009/03L-0 05000269/LER-1978-007-03, /03L-0:on 780314,Unit 2 Failed to Start.Caused by Field Flashing Breaker Failure.Breaker Failed Four Times Previously.Cause of Breaker Failure Not Determined. Monitoring & Investigation Will Continue 05000269/LER-1978-009-03, /03L-0:on 780322,Unit 2 Failed to Start.Caused by Field Flashing Breaker Failure.Breaker Failed on Five Previous Occasions.No Cause for Breaker Failure Found. Monitoring & Investigation Will Continue ML19312C236
References
LER-78-007-03L, LER-78-7-3L, NUDOCS 7912110626
Download: ML19312C237 (1)

LER-1978-007, /03L-0:on 780314,Unit 2 Failed to Start.Caused by Field Flashing Breaker Failure.Breaker Failed Four Times Previously.Cause of Breaker Failure Not Determined. Monitoring & Investigation Will Continue

Event date:
Report date:
2691978007R03 - NRC Website

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7s S EPCM T O A r t EVENT cESCalPTICN ANo pro 848LE CoNsECUENCES Q10 Lo_uj l At 0630 on March 14, 1978, during normal operation, Oconee attempted to gl start Keowee Hydro Unit 2 which is a source of auxiliary power for the El Oconee Nuclear Station. The unit f ailed to start due to an it. operable fTTs 1 l field flashing breaker.

The unit was started without incident after an ml investi2ation had been completed.

Keowee Unit 1 and other sources of I auxiliary power for the station were available if needed so that no loss o i i 3 ia i I of emergency power was experienced. Thus public health and safety were not

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