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Forwards LER 92-007-01 re unplanned ESF actuation of isolation valve for above-seat drain line.Rev addresses results of troubleshooting in effort to replicate conditions reported to determine cause of event.

Accession Number: ML20126A790

Date Released: Tuesday, May 19, 2020

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• ML20126A789 - Forwards LER 92-007-01 re unplanned ESF actuation of isolation valve for above-seat drain line.Rev addresses results of troubleshooting in effort to replicate conditions reported to determine cause of event. (2 page(s), 12/16/1992)
• ML20126A793 - LER 92-007-01:on 920912,unplanned ESF actuation of isolation valve for above-seat drain line occurred when valve manually opened.Caused by burping in valve.Training will be provided & valves tagged out. (6 page(s), 12/16/1992)