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Forwards LERs 80-053/03L-0,80-054/03L-0,80-055/03L-0 & 80-056/03L-0.

Accession Number: ML19344B085

Date Released: Tuesday, December 24, 2019

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• ML19344B084 - Forwards LERs 80-053/03L-0,80-054/03L-0,80-055/03L-0 & 80-056/03L-0. (1 page(s), 8/19/1980)
• ML19344B088 - LER 80-053/03L-0:on 800721,CEAC 1 failed during Mode 1 operation.Cause not determined.CEAC sys software reloaded, periodic tests performed & failure indications returned to normal.CEAC returned to operable status on all channels. (1 page(s), 8/19/1980)
• ML19344B093 - LER 80-054/03L-0:on 800721,control room emergency chiller 2VE-1B found inoperable during Mode 1 operation.Caused by unit tripping on high pressure due to improperly operating control valve 2CV-1506-2.Control valve repaired. (1 page(s), 8/19/1980)
• ML19344B098 - LER 80-055/03L-0:on 800721,PPS channel D received spurious DNBR/LPD trips during Mode 1 operation.Caused by fluctuating CPC DNBR/LPD temp input calculations.Temp transmitter 2TT- 4711-4 electrical leads checked & tightened. (1 page(s), 8/19/1980)
• ML19344B103 - LER 80-056/03L-0:on 800720,core protection calculator A received three auto restarts during 12-h period.Cause not determined but high room temp suspected.Room temp returned to normal & channel functional test performed. (1 page(s), 8/19/1980)