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Forwards LERs 81-030/03L-0,81-031/03L-0,81-047/03L-0 & 81-048/03L-0.

Accession Number: ML20030C059

Date Released: Tuesday, December 1, 2020

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• ML20030C058 - Forwards LERs 81-030/03L-0,81-031/03L-0,81-047/03L-0 & 81-048/03L-0. (1 page(s), 8/18/1981)
• ML20030C065 - LER 81-030/03L-0:on 810721,at 100% power,readings for heat tracing panel 9 circuits 25A & 7A were below acceptance criteria.Caused by electrical malfunction.Defective heat tracing replaced & tested.Design change initiated. (2 page(s), 8/18/1981)
• ML20030C068 - LER 81-031/03L-0:on 810723,w/unit at full power,no lock was discovered on breaker handle for loop A hot leg stop valve. Caused by inadvertent omission of lock from handle.Breaker verified as open.Lock put on breaker. (2 page(s), 8/18/1981)
• ML20030C073 - LER 81-047/03L-0:on 810721,w/unit at full power,breaker for svc water to cc heat exchangers found open w/valve not closed.Cause attributed to accidental bumping.Breaker closed.Valve cycled to verify operability. (2 page(s), 8/18/1981)
• ML20030C076 - LER 81-048/03L-0:on 810727,w/unit at 100% steady state power,routine control board walkdown revealed circuit breakers for BIT inlet & outlet to be open.Cause attributed to accidental opening by workers.Breakers reclosed. (2 page(s), 8/18/1981)