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Agrees w/continued operation for limited time notwithstanding incomplete environ testing of RHR pump motors.

Accession Number: ML20090B902

Date Released: Saturday, October 26, 2024

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• ML20090B900 - Agrees w/continued operation for limited time notwithstanding incomplete environ testing of RHR pump motors. (2 page(s), 3/18/1977)
• ML20090B905 - Concurs w/util justification to operate plant prior to completion of Qualification Tests IEEE-323-1974 & IEEE-334-1974 for RHR pump motors.Review & opinion requested. (2 page(s), 3/2/1977)
• ML20090B907 - Ack receipt of 770228 ltr re condition found during testing of certain modified safety injection sys motor operated valves.Final rept eagerly anticipated. (1 page(s), 3/10/1977)
• ML20090B912 - Forwards "Safety Injection Sys Valve Mod Interim Rept Covering Valve Design Operating Times,Standby Power Addition & ECCS Mods,San Onofre Generating Station,Unit 1." (10 page(s), 2/28/1977)
• ML20090B915 - LER 77-005:on 770220,leak of approximately 1% of sphere vol in 24 h noted.Caused by two holes inadvertently drilled through shell of containment vessel.Const & insp procedures will be revised.W/770304 ltr. (7 page(s), 2/6/1977)
• ML20090B918 - PNO-77-029:on 770219,excessive leakage reported during integrated containment leakage rate test.Caused by breach in subsurface steel containment sphere.Leaks monitored. (1 page(s), 2/28/1977)
• ML20090B965 - Discusses followup action on 761103 event involving cracks in four of six top mounted flexures discovered during visual exam of core barrel & thermal shield.Licensee plans to resume operation w/flexures in as-found condition. (1 page(s), 11/23/1976)
• ML20090B970 - Discusses apparent wear in steam generator tubes.Wear in some areas reduced cross-section of antivibration bar to 1/16 inch of bar matl.Recent insp revealed that integrity of bars compromised.Plant out of svc for insp. (2 page(s), 11/16/1976)
• ML20090B973 - Press release discussing potential safety-related problem which caused failure of steam generator tube.Preliminary info from exam indicates failure due to denting. (2 page(s), 10/28/1976)
• ML20090B978 - PNO-76-134:on 760730,orderly shutdown initiated following increase in leakage from RCS.Caused by tube failure in steam generator C.Repairs underway. (1 page(s), 7/30/1976)
• ML20090B982 - RO:on 760624,support cable for three sensors for digital temp monitoring buoy sys for Environ Zone 6 control station found severed.Two buoy anchor cables failed.Caused by heavy wave action.Sys repaired. (1 page(s), 7/15/1976)
• ML20090B985 - Ack receipt of 760628 ltr forwarding rept re inadequate replacement of concrete in diesel generator bldg & affected repairs.Rept will be reviewed & evaluated. (1 page(s), 7/13/1976)
• ML20090B987 - "Diesel Generator Bldg Const Problem,Rept Covering Ctr Wall Concrete Placement,Standby Power Addition & ECCS Mods,San Onofre Nuclear Generating Station,Unit 1," per 10CFR50.55(e)(3). (16 page(s), 6/28/1976)
• ML20090B992 - Forwards 24-h notice of RO re 760503 defect discovered in welds on rectangular coupling device positioned between extension shaft & sister hook adapter. (1 page(s), 5/14/1976)
• ML20090B996 - RO 760504:on 760503,defect found in welds on rectangular coupling device positioned between extension shaft & sister hook adapter.Coupling device determined unsuitable. Corrective measures will be taken prior to fuel shipment. (3 page(s), 5/4/1976)
• ML20090C000 - RO:on 760322,visual insp of spent fuel shipping cask lifting device revealed crack in protective paint covering of extension shaft.Caused by stress risers due to welding over threaded area.Crack ground.W/760405 & 0323 ltrs. (6 page(s), 3/23/1976)