05000317/LER-1980-058-03, /03L-0:on 801112,found 4 Kv Bus 11 Normal Break Feeder (152-1115) Opened & 120-volt Ac Vital Bus 11 Voltage Went Low.Cause Undetermined.Diesel Generator 11 re-energized 4 Kv Bus

/03L-0:on 801112,found 4 Kv Bus 11 Normal Break Feeder (152-1115) Opened & 120-volt Ac Vital Bus 11 Voltage Went Low.Cause Undetermined.Diesel Generator 11 re-energized 4 Kv Bus

ML19343B248
Person / Time
Site:	Calvert Cliffs
Issue date:	12/12/1980
From:	Davis S, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343B247	List: 05000317/LER-1980-058, Forwards LER 80-058/03L-0 05000317/LER-1980-058-03, /03L-0:on 801112,found 4 Kv Bus 11 Normal Break Feeder (152-1115) Opened & 120-volt Ac Vital Bus 11 Voltage Went Low.Cause Undetermined.Diesel Generator 11 re-energized 4 Kv Bus
References
LER-80-058-03L-01, LER-80-58-3L-1, NUDOCS 8012160394
Download: ML19343B248 (1)

LER-1980-058, /03L-0:on 801112,found 4 Kv Bus 11 Normal Break Feeder (152-1115) Opened & 120-volt Ac Vital Bus 11 Voltage Went Low.Cause Undetermined.Diesel Generator 11 re-energized 4 Kv Bus

Event date:
Report date:
3171980058R03 - NRC Website

text

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69 EV ENT QATE 74 75 REPORT OATE 80 EVENT oESCRIPTioN ANo pro 8ABLE CONSEQUENCES h t o 121 i At 2255 durine coerations,114 KV bus normal feed breaker (152-1115)

I i,,3 ; i souriously coened. Simultaneousiv,11 120 VAC vital bus voltane went i

io ! A1 I low.

11 diesel cenerator started autcmatically and re-enernized 11 4KV l

io,sil bus restorina normal voltaces. Durina the ensuinc voltace transient i

Io is i t ESFAS A loaic actuated causine a loss of shutdown enoline (SOC) flow l

loi7l l T.S. 3.9.8. SOC flow was restored at 23o5. Core alterations were ston-1 io,4i i ced from 2255 to 2305 ner T.S. 3.9.8.

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