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Updated LER 50-237/76-018:on 760325,leakage past feedwater isolation check valves 2-220-58B & 62B exceeded Tech Spec limit.Caused by excessive disc-to-seat clearances.O-ring seating areas lapped & seal ring areas honed.W/760629 ltr.

Accession Number: ML20090E365

Date Released: Monday, April 13, 2020

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• ML20090E362 - Updated LER 50-237/76-018:on 760325,leakage past feedwater isolation check valves 2-220-58B & 62B exceeded Tech Spec limit.Caused by excessive disc-to-seat clearances.O-ring seating areas lapped & seal ring areas honed.W/760629 ltr. (2 page(s), 6/29/1976)
• ML20090E367 - LER 50-237/76-018:on 760325,leakage past feedwater isolation check valves 2-220-58B exceeded Tech Spec limit.Cause not stated.Update rept to be submitted following valve exam, overhauling & repairs.W/760423 ltr. (2 page(s), 4/23/1976)