ML19249C769

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

ML19249C769
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/12/1979
From:	Trimble D ARKANSAS POWER & LIGHT CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19249C772	List: 05000368/LER-1979-070-03, /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 05000368/LER-1979-071-03, /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 05000368/LER-1979-073-03, /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 ML19249C769
References
2-099-6, 2-99-6, NUDOCS 7909180488
Download: ML19249C769 (1)