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Forwards LER 98-027-00,describing discovery of deficiency in surveillance testing of logic matrix for isolation of non- essential svc water sys heat loads & discovery that overlap between auxiliary contacts not adequately verified.

Accession Number: ML20195E067

Date Released: Monday, July 27, 2020

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• ML20195E063 - Forwards LER 98-027-00,describing discovery of deficiency in surveillance testing of logic matrix for isolation of non- essential svc water sys heat loads & discovery that overlap between auxiliary contacts not adequately verified. (1 page(s), 11/12/1998)
• ML20195E072 - LER 98-027-00:on 981013,inadequate TS surveillance testing of non-essential svc water isolation logic,was identified. Caused by failure of existing test procedure to adequately consider all postulated failure modes.Procedures changed. (7 page(s), 11/12/1998)