ML18081B115

Supplemental LER 79-077/03X-1:on 791224,during Startup operations,11ASD Breaker tripped,de-energizing 1A 4 Kv Vital Bus & Supplied Plant Loads.Caused by Failed Components. Logic Drawer & Relay Replaced

ML18081B115
Person / Time
Site:	Salem
Issue date:	02/22/1980
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081B114	List: ML18081B113 ML18081B115
References
LER-79-077-03X, LER-79-77-3X, NUDOCS 8002260612
Download: ML18081B115 (1)

Text

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[)))) I During startup operations, the llASD breaker tripped, de-energizing the lA 4kV C£lII I vital bus and supplied plant loads. The lA SEC panel was reset and the llASD

[]J!] I breaker was reclosed. Maintenance electricians declared the lA SEC inoperable and

£II[J I Action Statements for T/S 3.8.1.1 and 3.3.2.1 were implemented. The lA SEC was

[]J[} I repaired, tested and returned to service in 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> and 16 minutes. The plant wasr

[]JI] I in Hot Standby th~oughout this occurrence. This is the first occurrence of this

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t:_J 32 ACTION FUTURE EFFECT SHUTDOWN (.;;\ ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FORM i>UB. SUPPLIER MANUFACTURER W@W@ ~@ L2.J@ Io I 01 o I 01 ~@ l::J@ i!J@ IA 16 I 410 I@

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[I))] I Failed components in the logic circuit led to an erroneous start of a Mode II operation. When the diesel breaker did not receive a signal to close, the sequence was aborted. The entire logic drawer was replaced to expedite recovery IJJ]J I of the lA SEC. Further troubleshooting of the failed drawer resulted in five

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