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Forwards LER 99-004-00 re check valves for containment atmosphere control sys vacuum breaker isolation valve accumulator did not meet leakage requirements during testing.Commitments,encl.

Accession Number: ML20205K254

Date Released: Thursday, August 6, 2020

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• ML20205K249 - Forwards LER 99-004-00 re check valves for containment atmosphere control sys vacuum breaker isolation valve accumulator did not meet leakage requirements during testing.Commitments,encl. (2 page(s), 4/8/1999)
• ML20205K264 - LER 99-004-00:on 990309,check valves for "A" containment atmosphere CS vacuum breaker isolation valve accumulator did not meet requirements during testing.Caused by improper selection of valve type.Valve discs replaced. (4 page(s), 4/8/1999)