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Submits addl info re adequacy of offsite power sys in response to NRC 791001 request.Sys functioned as designed. Forwards LERs 77-032/03L-0,77-037/03L-0,77-045/03L-0, 77-046/03L-0 & 78-035/03L-0.

Accession Number: ML18081A856

Date Released: Thursday, November 29, 2018

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• ML18081A855 - Submits addl info re adequacy of offsite power sys in response to NRC 791001 request.Sys functioned as designed. Forwards LERs 77-032/03L-0,77-037/03L-0,77-045/03L-0, 77-046/03L-0 & 78-035/03L-0. (4 page(s), 1/3/1980)
• ML18081A857 - Forwards LER 77-032/03L-0. (3 page(s), 5/13/1977)
• ML18081A858 - LER 77-032/03L-0:on 770418,during Mode 1 operation, protective relay operation caused loss of 5024 500-kV transmission line.Caused by smoke from forest fire 36-37 miles from facility. (1 page(s), 5/2/1977)
• ML18081A859 - Forwards LER 77-037/03L-0. (3 page(s), 6/2/1977)
• ML18081A860 - LER 77-037/03L:on 790514,during Mode 1 operation,5023 500-kV transmission line tripped.Caused by forest fire between towers 36/1 & 36/3. (1 page(s), 5/18/1977)
• ML18081A861 - Forwards LER 77-045/03L-0. (3 page(s), 7/19/1977)
• ML18081A862 - LER 77-045/03L-0:on 770626,during 100% generator trip test, 5024 500-kV transmission line became inoperable.Caused by bus sections 1-5 & 5-6 breaker flashover NHC IIA relay remaining energized.Relay removed from svc. (1 page(s), 7/10/1977)
• ML18081A863 - Forwards LER 77-046/03L-0. (3 page(s), 7/19/1977)
• ML18081A864 - LER 77-046/03L-0:on 770626,during Mode 2 operation,station power transformer became inoperable due to protective relay operation.Caused by personnel error in not tagging breaker failure. (1 page(s), 7/12/1977)
• ML18081A865 - Forwards LER 78-035/03L-0. (3 page(s), 7/20/1978)
• ML18081A867 - LER 78-035/03L-0:on 780630,gas starting turbine relay operation caused loss of power to station power transformer. Caused by personnel error in preparing unit for svc.Operator reinstructed on proper breaker operation. (1 page(s), 7/20/1978)