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Forwards five LERs for containment isolation valves which failed local leak rate tests during Jan 1975 at facility.

Accession Number: ML20058K743

Date Released: Thursday, March 12, 2020

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• ML20058K737 - Forwards five LERs for containment isolation valves which failed local leak rate tests during Jan 1975 at facility. (1 page(s), 2/10/1975)
• ML20058L203 - LER:on 750115,both core spray testable check valves AO 14-13A & AO 14-13B found leaking in excess of acceptance criteria.Caused by accumulation of scale on seating surfaces.Valve seats cleaned & retested satisfactorily. (1 page(s), 2/7/1975)
• ML20058L207 - LER:on 750114,RCIC turbine exhaust line check valve found leaking in excess of acceptance criteria.Caused by previous assembly of valve disc w/o sufficient clearance between disc washer & nut. (1 page(s), 2/7/1975)
• ML20058L214 - LER:on 750110,outboard main steam line drain isolation valve found leaking in excess of acceptance criteria for local leak rate tests.Valve retested satisfactory. (1 page(s), 2/7/1975)
• ML20058L228 - LER:on 750115,LPCI A testable check valve found leaking in excess of acceptance criteria for local leak rate tests. Caused by accumulation of scale on seating surfaces.Seating surfaces cleaned & lapped. (1 page(s), 2/7/1975)
• ML20058L233 - LER:on 750207,HPCI turbine exhaust check valve found leaking in excess of acceptance criteria. (1 page(s), 2/7/1975)