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Forwards LERs 79-070/03L-0,79-071/03L-0,79-072/03L-0 & 79-073/03L-0.

Accession Number: ML19249C772

Date Released: Friday, September 20, 2019

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• ML19249C769 - Forwards LERs 79-070/03L-0,79-071/03L-0,79-072/03L-0 & 79-073/03L-0. (1 page(s), 9/12/1979)
• ML19249C774 - LER 79-070/03L-0:on 790816,during Mode 1 operation,battery eliminator 2D35 failed,causing reactor trip breakers to open.Caused by relay coil failure due to sticking plunger. Relay replaced & breakers reclosed. (1 page(s), 9/12/1979)
• ML19249C778 - LER 79-071/03L-0:on 790818,during Mode 1 operation,B core protection calculator failed.Caused by memory failure. Memory module replaced,software loaded,core protection calculator functionally tested & returned to svc. (1 page(s), 9/12/1979)
• ML19249C780 - LER 79-072/03L-0:on 790818,following plant trip,emergency feedwater pump turbine driver 2K3 for pump 2P7A tripped on overspeed.Caused by sticky linkage on turbine governor.Trip reset & 2P7A sucessfully tested. (1 page(s), 9/12/1979)
• ML19249C782 - LER 79-073/03L-0:on 790820,during Mode 1 operation,spurious control element assembly calculator penalty factor outputs caused reactor trip.Caused by dirty input card contacts.Edge connector cleaned & calculators verified operable. (1 page(s), 9/12/1979)