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Forwards LERs 80-001/03L-0,80-002/03L-0 & updated LER 79-087/03X-1.

Accession Number: ML19260D677

Date Released: Tuesday, October 1, 2019

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• ML19260D676 - Forwards LERs 80-001/03L-0,80-002/03L-0 & updated LER 79-087/03X-1. (1 page(s), 2/5/1980)
• ML19260D680 - LER 80-001/03L-0:on 800107,during Mode 1 operation, containment isolation valve 25V-5876-2 failed to close after taking samples from safety injection tanks for boron analysis.Caused by faulty valve position indication. (1 page(s), 2/5/1980)
• ML19260D684 - LER 80-002/03L-0:on 800110,during Mode 1 operation,core protection calculator C failed,resulting in DNBR & linear power density trips in Channel C primary power sys.Cause undetermined.Sys restarted during failure analysis. (1 page(s), 2/5/1980)
• ML19260D685 - Updated LER 790987/03X-1:on 791114,during Mode 5 operation, leak was discovered in socket weld on LPSI flow orifice valve 2SI-5091B.Failure resembles mechanical fatigue failure of weld.Valve replaced & socket weld dye penetrant checked. (1 page(s), 2/5/1980)