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 Issue dateTitleTopic
ML20045B2739 June 1993LER-93-016-00:on 930503,TS Violation Occured Due to Circuitry for SG PORVs & RCS Subcooling Monitor Being Inoperable.Caused by Less than Adequate Work Practices. Screws Missings from Qdps Replaced & Walkdown Performed
ML20045E14925 June 1993LER 93-010-00:on 930526,discovered That Screen Drive Coupling on Essential Cooling Water Traveling Screen 2A Damaged.Caused by Aging of Elastomeric Element.Couplings Replaced & Preventive Maint initiated.W/930625 LtrUltimate heat sink
ML20045E15325 June 1993LER 93-017-00:on 930527,determined That Feedwater Isolation Bypass Valves Inoperable Since Pneumatic Positioner & Solenoids Remained in Svc Beyond Qualified Life.Caused by Incorrect Interpretation of Design Documents.Mod Underway
ML20045H91714 July 1993LER 93-008-01:on 930505,discovered That RHR Pump Suction MOV Had Not Been Environ Qualified Since 901129 Because Replacement of Drain T Not Completed.Drain T Missing from RH-0060B Replaced & Bulletin Issued to Maint DeptPost Accident Monitoring
Fire Protection Program
ML20045H98813 July 1993LER 93-012-01:on 930405,TS Violation Occurred Due to Incorrect Settings of Several Molded Case Circuit Breakers. Reset Affected Unit 1 Breakers to Correct Settings. W/930713 Ltr
ML20045J02815 July 1993LER 93-016-01:on 930503,TS Violations Occurred Due to Circuitry for SG Power Operated Relief Valves & Post Accident Monitoring Instruments Being Inoperable.Replaced Missing Screws from Unit 1 QDPS.W/930715 LtrSafe Shutdown
Post Accident Monitoring
ML20046A65120 July 1993LER 93-017-01:on 930527,concluded That,Based on 930521 Determination,That Feedwater Isolation Bypass Valves Inoperable Since Pneumatic Positioners & Solenoids Remained in Svc Beyond Qualified Life.Control Scheme Modified
ML20046A67921 July 1993LER 93-011-00:on 930401,pressurizer Safety Valve Setpoints Found Outside Required TS Tolerance.Caused by Setpoint Drift Due to Inherent Valve Characteristics.Mod of Test Procedures UnderwayTime of Discovery
Loop seal
ML20046B12929 July 1993LER 93-012-00:on 930614,lost Spent Fuel Pool Cooling for Approx 13 Hours Due to Insufficient Control Board Awareness. Design Change to Install Annunciator in Control Room to Inform of Loss of Spent Fuel cooling.W/930729 Ltr
ML20046C4905 August 1993LER 93-019-00:on 930709,determined That TS Requirement of MSIV Was Not Met Due to Inadequate Design of Field Change to Testing Function of Solid State Protection Sys.Corrected Missing Jumpers & Overlap Testing discrepancy.W/930805 Ltr
ML20046C5476 August 1993LER 93-018-00:on 930707,discovered Remote Position Indication Verification Test for SI Sys Accumulator Vent & Header Valves Had Not Been Performed in 2 Yrs Due to Change to IST plan.W/930806 LtrStroke time