| | | Reporting criterion |
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| 05000244/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | |
| 05000244/LER-1981-001-03, /03L-0:on 810105,leak Noted on Diesel Emergency Generator B Jacket Cooling Water Return Line to Expansion Tank.Caused by Broken Bushing Due to Possible Lack of Support Connection.Bushing Replaced | /03L-0:on 810105,leak Noted on Diesel Emergency Generator B Jacket Cooling Water Return Line to Expansion Tank.Caused by Broken Bushing Due to Possible Lack of Support Connection.Bushing Replaced | |
| 05000244/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000244/LER-1981-002-03, /03L-0:on 810109,safety Injection Pump C Did Not Start W/Bus Breaker 16.Probable Cause Due to Breaker in off-set Position.Personnel to Be Instructed in Proper Breaker Alignment | /03L-0:on 810109,safety Injection Pump C Did Not Start W/Bus Breaker 16.Probable Cause Due to Breaker in off-set Position.Personnel to Be Instructed in Proper Breaker Alignment | |
| 05000244/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000244/LER-1981-003-03, /03L-0:on 810115,during Normal Reactor Coolant Boration,Absence of Boric Acid Flow from a Boric Acid Pump Observed.A Pump Declared Inoperable.Caused by Valve Not Fully Open After Sampling.Valves Will Be Locked Open | /03L-0:on 810115,during Normal Reactor Coolant Boration,Absence of Boric Acid Flow from a Boric Acid Pump Observed.A Pump Declared Inoperable.Caused by Valve Not Fully Open After Sampling.Valves Will Be Locked Open | |
| 05000244/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000244/LER-1981-004-03, /03L-0:on 810211,containment Fan Cooler Unit C Condensate Dumps & Sump a Pumping Rate Increased During Normal Steady State Operation.Probably Caused by Galvanic Reaction of Carbon Steel Plug in Copper Motor Cooler | /03L-0:on 810211,containment Fan Cooler Unit C Condensate Dumps & Sump a Pumping Rate Increased During Normal Steady State Operation.Probably Caused by Galvanic Reaction of Carbon Steel Plug in Copper Motor Cooler | |
| 05000244/LER-1981-005-03, /03L-0:on 810302,safety Injection Pump Did Not Start W/Westinghouse DB-50 Air Circuit Breaker 16 During Test C.Caused by Closing Circuit Malfunction.Breaker Replaced & Tested.Investigation Continuing | /03L-0:on 810302,safety Injection Pump Did Not Start W/Westinghouse DB-50 Air Circuit Breaker 16 During Test C.Caused by Closing Circuit Malfunction.Breaker Replaced & Tested.Investigation Continuing | |
| 05000244/LER-1981-005, Forwards LER 81-005/03L-0 & Updated LER 81-002/03X-1 | Forwards LER 81-005/03L-0 & Updated LER 81-002/03X-1 | |
| 05000244/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000244/LER-1981-006-03, /03L-0:on 810323,immediate Borate Valve Outlet Piping Found Leaking.Probably Caused by Stress Corrosion Cracking.Investigation Underway | /03L-0:on 810323,immediate Borate Valve Outlet Piping Found Leaking.Probably Caused by Stress Corrosion Cracking.Investigation Underway | |
| 05000244/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000244/LER-1981-007-03, /03L-0:on 810418,loss of 34.5-kV Supply to Transformer 12 Occurred,Creating Loss of Offsite Power. Caused by Fault in B Phase Vacuum Breaker Switch Which Supplies Spare Transformer 12B | /03L-0:on 810418,loss of 34.5-kV Supply to Transformer 12 Occurred,Creating Loss of Offsite Power. Caused by Fault in B Phase Vacuum Breaker Switch Which Supplies Spare Transformer 12B | |
| 05000244/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000244/LER-1981-008-03, /03L-0:on 810402,radiation Monitors R-11 & R-12 Were Inoperative & Monitor R-10A Was Not Placed in Operation.Caused by Seized Bearing in Pump Supplying Air Sample to R-11 & R-12.Procedure Modified to Put 10A in Svc | /03L-0:on 810402,radiation Monitors R-11 & R-12 Were Inoperative & Monitor R-10A Was Not Placed in Operation.Caused by Seized Bearing in Pump Supplying Air Sample to R-11 & R-12.Procedure Modified to Put 10A in Svc | |
| 05000244/LER-1981-009-01, /01T-0:on 810515,fifteen Tubes in Steam Generator B Showed Indications.Caused by Concentration of Caustics in Crevices Leading to Intergranular Attack & Wedge Area Defect in One Indication.Tubes Welded or Mechanically Plugge | /01T-0:on 810515,fifteen Tubes in Steam Generator B Showed Indications.Caused by Concentration of Caustics in Crevices Leading to Intergranular Attack & Wedge Area Defect in One Indication.Tubes Welded or Mechanically Plugged | |
| 05000244/LER-1981-009, Forwards LER 81-009/01T-0 | Forwards LER 81-009/01T-0 | |
| 05000244/LER-1981-010-03, /03L-0:on 810420,leaking Relief Valve Was Found on Letdown Sys.Caused by Cracked Bellows Due to Increasing Differential Pressure as Result of Crud Buildup.Valve Repaired & Reinstalled | /03L-0:on 810420,leaking Relief Valve Was Found on Letdown Sys.Caused by Cracked Bellows Due to Increasing Differential Pressure as Result of Crud Buildup.Valve Repaired & Reinstalled | |
| 05000244/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000244/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000244/LER-1981-011-03, /03L-0:on 810426,small Leak in Fitting of RHR Pump Seal 1B Discovered.Caused by Worn Fitting Threads. Fitting Replaced | /03L-0:on 810426,small Leak in Fitting of RHR Pump Seal 1B Discovered.Caused by Worn Fitting Threads. Fitting Replaced | |
| 05000244/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000244/LER-1981-012-03, /03L-0:on 810504,pressurizer Pressure Transmitter PT-431 Found High.Caused by Transmitter Drift.Transmitter Recalibr | /03L-0:on 810504,pressurizer Pressure Transmitter PT-431 Found High.Caused by Transmitter Drift.Transmitter Recalibr | |
| 05000244/LER-1981-013-03, /03L-0:on 810714,pipe Leakage Noted in Charging Pump Suction Line from Immediate Borate Sys.Probably Caused by Stress Corrosion Cracking.No Exam Possible Until Replacement Completed Next Cold Shutdown | /03L-0:on 810714,pipe Leakage Noted in Charging Pump Suction Line from Immediate Borate Sys.Probably Caused by Stress Corrosion Cracking.No Exam Possible Until Replacement Completed Next Cold Shutdown | |
| 05000244/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | |
| 05000244/LER-1981-014-03, /03L-0:on 810720,halon Fire Suppression Sys Was Inoperable for More than 14-day Limit.Caused by Lack of Info Re Tech Spec Requirement in Procedures.Procedures Changed to Restore Operability of Sys While Mod Continued | /03L-0:on 810720,halon Fire Suppression Sys Was Inoperable for More than 14-day Limit.Caused by Lack of Info Re Tech Spec Requirement in Procedures.Procedures Changed to Restore Operability of Sys While Mod Continued | |
| 05000244/LER-1981-014, Forwards LER 81-014/03L-0 | Forwards LER 81-014/03L-0 | |
| 05000244/LER-1981-015, Forwards Updated LER 81-015/01X-1 | Forwards Updated LER 81-015/01X-1 | |
| 05000244/LER-1981-015-01, During Containment Atmosphere Sampling & Analysis,Nonautomatic Primary Containment Isolation Valve Opened.Caused by Procedure Inadequacy.Procedure PC-23.2 Revised | During Containment Atmosphere Sampling & Analysis,Nonautomatic Primary Containment Isolation Valve Opened.Caused by Procedure Inadequacy.Procedure PC-23.2 Revised | |
| 05000244/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000244/LER-1981-016-03, /03L-0:on 811105,during Test C,Si Pump Did Not Start W/Bus 16 Breaker.Caused by Closing Circuit Malfunction,Due to Weak Lockout Coil.Qualified Replacement Installed & Tested | /03L-0:on 811105,during Test C,Si Pump Did Not Start W/Bus 16 Breaker.Caused by Closing Circuit Malfunction,Due to Weak Lockout Coil.Qualified Replacement Installed & Tested | |
| 05000244/LER-1981-017-03, /03L-0:on 811110,several Fire Suppression Sys Had Exceeded 14-day out-of-svc Limit.Caused by Sys Removal from Svc to Perform Mods Required by 10CFR50,App R.Sys to Be Returned to Svc by 811117 | /03L-0:on 811110,several Fire Suppression Sys Had Exceeded 14-day out-of-svc Limit.Caused by Sys Removal from Svc to Perform Mods Required by 10CFR50,App R.Sys to Be Returned to Svc by 811117 | |
| 05000244/LER-1981-017, Forwards LER 81-017/03L-0 | Forwards LER 81-017/03L-0 | |
| 05000244/LER-1981-018, Forwards LER 81-018/03L-0 | Forwards LER 81-018/03L-0 | |
| 05000244/LER-1981-018-03, /03L-0:on 811202,zones S03,S04 & S05 of Fire Suppression Sys Had Been Isolated for 14 Days.Caused by Inadvertent Operation of Fire Suppression Sys on 811114.Fire Watches Established & Protection Sys to Be Installed | /03L-0:on 811202,zones S03,S04 & S05 of Fire Suppression Sys Had Been Isolated for 14 Days.Caused by Inadvertent Operation of Fire Suppression Sys on 811114.Fire Watches Established & Protection Sys to Be Installed | |
| 05000244/LER-1981-019-03, /03L-0:on 811114,two Full Length Rods Misaligned from Group Step Counter Demand Position by More than 12 Steps.Caused by Inadvertent Actuation of Fire Suppression Sys Due to Personnel Procedural Error | /03L-0:on 811114,two Full Length Rods Misaligned from Group Step Counter Demand Position by More than 12 Steps.Caused by Inadvertent Actuation of Fire Suppression Sys Due to Personnel Procedural Error | |
| 05000244/LER-1981-019, Responds to NRC Re Violations Noted in IE Insp Rept 50-244/81-24.Corrective actions:LER-81-019 Submitted Reporting 811114 Event Re Inadvertent Actuation of Fire Suppression Sys | Responds to NRC Re Violations Noted in IE Insp Rept 50-244/81-24.Corrective actions:LER-81-019 Submitted Reporting 811114 Event Re Inadvertent Actuation of Fire Suppression Sys | |
| 05000244/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000244/LER-1981-020-03, /03L-0:on 811119,two Fire Seals from a Battery Room Found Not Installed.Caused by Personnel Failure to Fill Seals W/Fire Barrier Foam.Improved Training & Supervision Instituted | /03L-0:on 811119,two Fire Seals from a Battery Room Found Not Installed.Caused by Personnel Failure to Fill Seals W/Fire Barrier Foam.Improved Training & Supervision Instituted | |
| 05000244/LER-1981-021, Forwards LER 81-021/03L-0 | Forwards LER 81-021/03L-0 | |
| 05000244/LER-1981-021-03, /03L-0:on 811222,while at steady-state 100% Operation,Periodic Test Identified Containment Gas Radiation Monitor Return Line Check Valve Not Sealing Tight.Caused by Dirt on Seat of Rockwell 1-inch 1500 Psi Valve | /03L-0:on 811222,while at steady-state 100% Operation,Periodic Test Identified Containment Gas Radiation Monitor Return Line Check Valve Not Sealing Tight.Caused by Dirt on Seat of Rockwell 1-inch 1500 Psi Valve | |
| 05000244/LER-1981-022-01, /01T-0:on 811221,error Discovered in Data Supplied for Containment for Coolers in LOCA-ECCS Analysis.Cause Not Given.Calculations Will Be Performed Prior to Start of Cycle XII | /01T-0:on 811221,error Discovered in Data Supplied for Containment for Coolers in LOCA-ECCS Analysis.Cause Not Given.Calculations Will Be Performed Prior to Start of Cycle XII | |
| 05000244/LER-1981-022, Forwards LER 81-022/01T-0 | Forwards LER 81-022/01T-0 | |
