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Forwards LER 78-091/03L-0,LER 78-092/03L-0,LER 78-094/03L-0, LER 78-095/03L-0,LER 78-096/03L-0,LER 78-097/03L-0, LER 78-099/03L-0 & LER 78-103/03L-0.

Accession Number: ML20064C761

Date Released: Wednesday, March 18, 2020

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• ML20064C759 - Forwards LER 78-091/03L-0,LER 78-092/03L-0,LER 78-094/03L-0, LER 78-095/03L-0,LER 78-096/03L-0,LER 78-097/03L-0, LER 78-099/03L-0 & LER 78-103/03L-0. (1 page(s), 10/25/1978)
• ML20064C763 - LER 78-091/03L-0:on 780927,nonconservative low flow trip setpoint discerned during routine recalibr of reactor coolant flow loop channel B.Caused by procedural error.Loop calibr corrected. (2 page(s), 10/24/1978)
• ML20064C766 - LER 78-092/03L-0:on 780927,transmitter LT1486 did not activate hi-hi level turbine trip & feedwater isolation until level of 76.33% reached in violation of Tech Spec limit.Caused by drift in transmitter output. (2 page(s), 10/24/1978)
• ML20064C773 - LER 78-094/03L-0:on 780927,containment isolation valves TV- CC-102D & TV-CC-102F failed to close during cycling.Caused by blocked solenoid air supply. (2 page(s), 10/24/1978)
• ML20064C778 - LER 78-095/03L-0:on 780928,during routine recalibr,high pressure reactor trip bistable would not activate until actual pressure of 2,396 psig reached.Caused by transmitter output drift. (2 page(s), 10/24/1978)
• ML20064C782 - LER 78-096/03L-0:on 780927,fluid lost in snubber 1-RC-HSS-861.Caused by leak at reservoir seal. (1 page(s), 10/24/1978)
• ML20064C786 - LER 78-097/03L-0:on 780928,fluid lost in snubber 1-RC-HSS-873.Caused by warping of reservoir from steam generator insulation on blanket. (1 page(s), 10/24/1978)
• ML20064C789 - LER 78-099/03L-0:on 780926,during Mode 5 operatio,level transmitter LT-1475 did not activate hi-hi level turbine trip & feedwater isolation bistable until actual level of 76.82 reached.Caused by transmitter output drift. (2 page(s), 10/24/1978)
• ML20064C793 - LER 78-103/03L-0:on 781004,during heatup from hot shutdown to hot standby,feedwater line from ECST 1-CN-TK-1 to steam generators A,B & C via 1-FW-P-3B auxiliary feedwater pumps not secured.Caused by unavailability of plant 2d. (2 page(s), 10/25/1978)