L-77-005, Letter IE Bulletin Nos. 77-05 & 77-05A
05000206/LER-1980-032-03, /03L-0:on 800717,during Cold Shutdown Conditions, Isolation Valve for Svc Water to Containment Failed to Close Upon Demand.Caused by Small Amount of Desiccant Which Entered Solenoid During Removal of Air Dryer Desiccant
05000206/LER-1979-021-01, /01T-0:on 791114,while Making Routine Rounds, Operator Found 15 Volt Dc Power Supply on Y Subchannel of Load Sequencer Number 2 Had Tripped Off.Cause Unknown.Power Supply Reset & Sequencer Sucessfully Tested
05000206/LER-1979-003-03, /03L-0 on 790404:during Normal Operation,Isolation Valve on Cooling Water from Containment Air Handling Units Failed to Latch in Open Position.Caused by Dislodged Wire Clip & Metal Pin.Solenoid Replaced & Pin Secured
05000206/LER-1980-034-03, /03L-0:on 800901,during Steam Generator Tube Removal,Unexpected Water in Secondary Side Intruded Into Rcs.Caused by Inadequate Drainage Between Water Source & Generators.Drain Has Been Installed
05000206/LER-1977-003, Responds to IE Bulletin 80-12, Decay Heat Removal Sys Operabililty. One Event,Reported in LER 77-03,involved Degradation of Decay Heat Removal Capability for Several Minutes.Emergency & Main Procedures Revised
05000206/LER-1980-037-04, /04L-0:during Routine Data Processing,Ocean Thermal Measurement Data Taken at Station C2S & C22S on 790313-1113 Found Irretrievable.Caused by Failure of Endeco Sensor Motor,Jammed Cartridge or Overexposed Film