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Forwards LER 79-003/03L-0.

Accession Number: ML17296A304

Date Released: Friday, October 11, 2019

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• ML19270F656 - Forwards LER 79-003/03L-0. (2 page(s), 2/16/1979)
• ML19270F659 - LER 79-003/03L-0 on 790130:1-2001-4 valve leak rate was 26.0 std cubic feet per hour.Caused by worn valve stem packing.Valve packing replaced. (2 page(s), 2/16/1979)
• ML19270F662 - LER 79-003/03L-0 on 790124:reactor bldg-to-suppression chamber vacuum breaker 1.1601-31B had leak rate of 142.7 std cubic feet per hour.Caused by component failure.Valve packing replaced & second leak test performed. (2 page(s), 2/16/1979)
• ML19270F668 - LER 79-003/03L-0 on 790122:containment purge vol bounded by valves had leak rate of 58.3 std cubic feet per hour.Caused by insufficient stem travel to allow valve disc to fully contact valve seat.Valve operator stroke lengthened. (1 page(s), 2/16/1979)
• ML19270F673 - LER 79-003/03L-0 on 790119:MSIV leaking in excess of Tech Spec limits.Not all valves have been repaired.Suppl rept will be sent upon completion of testing & corrective actions. (1 page(s), 2/16/1979)
• ML19270F676 - LER 79-003/03L-0 on 790120:feedwater check valve 1-220-62B was leaking.Caused by dirty valve seat preventing proper seating of valve disc.Valve seat was cleaned & new Kalraz "O" ring installed. (2 page(s), 2/16/1979)
• ML19270F679 - LER 79-003/03L-0 on 790119:valve MO1-220-1 found leaking at rate of 43.8 std cubic feet per hour.Caused by dirty & worn disc-to-seat surfaces.Valve disc was relapped & valve seat cleaned. (2 page(s), 2/16/1979)
• ML19270F684 - LER 79-003/03L-0 on 790119:reactor core isoloation cooling sys turbine steam exhaust check valve CV 1-1301-41 was leaking.Caused by dirty valve internals.Valve internals cleaned & valve reassembled. (2 page(s), 2/16/1979)
• ML17296A303 - Forwards proof of svc for Amend 20 to PSAR served upon H Atkinson,Chairman of Board of Supervisors of Maricopa,AZ, on 790302. (6 page(s), 3/2/1979)
• ML19270F682 - LER 79-003/03L-0 on 790119:1-2301-45 check valve leak rate was 190.3 std cubic feet per hour.Caused by failure of gasketed seating surface between valve body seating & disc. Check valve replaced w/new exact replacement valve. (2 page(s), 2/16/1979)
• ML19270F683 - LER 79-003/03L-0 on 790118:flange seal gasket was leaking in excess of 30 std cubic feet per second.Caused by seal gasket wear.Seal gasket will be inspected further & replaced if necessary. (2 page(s), 2/16/1979)