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Forwards LER 78-126/03L-0,78-128/03L-0,78-129/03L-0, 78-131/03L-0 & 78-132/03L-0.

Accession Number: ML19256A683

Date Released: Friday, September 27, 2019

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• ML19256A682 - Forwards LER 78-126/03L-0,78-128/03L-0,78-129/03L-0, 78-131/03L-0 & 78-132/03L-0. (1 page(s), 1/4/1979)
• ML19256A685 - LER 78-126/03L-0 on 781206:during monthly test one of the heat tracing channels of the boron injection sys was found inoperable.Caused by open circuit in a boron injection tank heater, caused by defective cable. (2 page(s), 1/3/1979)
• ML19256A692 - LER 78-128/03L-0 on 781214: after main steam trip valve 1-TV-MS-111A was opened during reactor trip it failed to close fully.Caused by washer stuck in mechanism. (2 page(s), 1/3/1979)
• ML19256A697 - LER 78-129/03L-0 on 781219: during performance of routine periodic test of reactor rate trip time constant for NIS channel N-42, allowable time limits were not observed.Caused by electronic drift in instrumentation. (2 page(s), 1/3/1979)
• ML19256A701 - LER 78-131/03L-0 on 781211: alarms for pressurizer level protection channel L-1460 were observed indicating tripped status on a logic channel in protection system. Caused by blown fuse in process circuitry for the L-1460 channel. (3 page(s), 1/3/1979)
• ML19256A704 - LER 78-132/03L-0 on 781213:during periodic test for post DBA Hydrogen Analyzer,it was found that the analyzer indicated 8.5% less hydrogen than the sample gas indicated. Recombiner 2-HC-HC-1 was declared inoperable & analyzer uncalibrated. (2 page(s), 1/3/1979)