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Forwards LERs 99-003-00 & 99-004-00 re manual ESFAs (reactor trips) due to problems with main feedwater control.Two events are being reported separately because actual causes are considered different & independent of each other.

Accession Number: ML20195K425

Date Released: Monday, July 27, 2020

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• ML20195K420 - Forwards LERs 99-003-00 & 99-004-00 re manual ESFAs (reactor trips) due to problems with main feedwater control.Two events are being reported separately because actual causes are considered different & independent of each other. (2 page(s), 6/11/1999)
• ML20195K428 - LER 99-003-00:on 990513,reactor manually tripped due to loss of main feedwater.Caused by "open" relay contact in output of feedwater regulation control sys.Faulty relay was replaced. (6 page(s), 6/11/1999)
• ML20195K435 - LER 99-004-00:on 990515,reactor manually tripped due to feedwater control valve opening.Caused by faulty valve positioner.Faulty positioner was replaced. (6 page(s), 6/11/1999)