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Forwards LERs 87-018-00,87-019-00 & 87-020-00.

Accession Number: ML20215H004

Date Released: Sunday, August 16, 2020

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• ML20215H001 - Forwards LERs 87-018-00,87-019-00 & 87-020-00. (1 page(s), 4/14/1987)
• ML20215H006 - LER 87-018-00:on 870316,during performance of leak detection sys surveillance instruction,unexpected RCIC sys isolation occurred.Cause unknown.Investigation of event continuing. Trace of installed wiring performed. (2 page(s), 4/14/1987)
• ML20215H011 - LER 87-019-00:on 870317,unexpected RCIC sys isolation occurred when technicians connected test equipment prior to leak detection sys isolation bypass switches placed in bypass.Caused by personnel error.Technicians counseled. (3 page(s), 4/14/1987)
• ML20215H014 - LER 87-020-00:on 870316,backup hydrogen purge inside containment isolation valve unexpectedly isolated due to loss of dc bus D-1-A.Caused by personnel error.Individual counseled on need to exercise caution around switchgear. (3 page(s), 4/14/1987)