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| 05000266/LER-1980-001-01, /01T-0:on 800202,during Routine Calibr of Pressure Transmitters for Motor Driven Auxiliary Feed Pumps, Transmitter Isolation Block Valves Discovered Closed.Caused by Inadvertent Closing of Isolation Valves.Snubbers Added | /01T-0:on 800202,during Routine Calibr of Pressure Transmitters for Motor Driven Auxiliary Feed Pumps, Transmitter Isolation Block Valves Discovered Closed.Caused by Inadvertent Closing of Isolation Valves.Snubbers Added | |
| 05000266/LER-1980-001, Forwards LER 80-001/01T-0 | Forwards LER 80-001/01T-0 | |
| 05000301/LER-1980-001-01, /01T-0:on 800221,during Full Power Operation, Momentary Loss of Red Instrument Bus Occurred,Resulting in Power Range Channel N41 Failing Low.Caused by Faulty Capacitor in 2DY01 Power Supply.Capacitor Replaced | /01T-0:on 800221,during Full Power Operation, Momentary Loss of Red Instrument Bus Occurred,Resulting in Power Range Channel N41 Failing Low.Caused by Faulty Capacitor in 2DY01 Power Supply.Capacitor Replaced | |
| 05000301/LER-1980-001, Forwards LER 80-001/01T-0 | Forwards LER 80-001/01T-0 | |
| 05000301/LER-1980-002-01, /01T-0:on 800227,primary-to-secondary Leak Was Identified in Steam Generator a Resulting in Shutdown of Unit.Caused by Leaking Tube at Position R18C37.Six Defective Tubes Found in Steam Generator a | /01T-0:on 800227,primary-to-secondary Leak Was Identified in Steam Generator a Resulting in Shutdown of Unit.Caused by Leaking Tube at Position R18C37.Six Defective Tubes Found in Steam Generator a | |
| 05000266/LER-1980-002, Updated LER 80-002/01T-01:on 800311,during 800 Psi Secondary to Primary Hydrostatic Leak Test,Tubes R23C44 & R8C37 & Plug End R23C50 Found Leaking.Eddy Current Insp Performed.Tube Holes & Leaking Explosive Plugs Were Plug Welde | Updated LER 80-002/01T-01:on 800311,during 800 Psi Secondary to Primary Hydrostatic Leak Test,Tubes R23C44 & R8C37 & Plug End R23C50 Found Leaking.Eddy Current Insp Performed.Tube Holes & Leaking Explosive Plugs Were Plug Welded | |
| 05000266/LER-1980-002-01, /01T-0:on 800311,during shutdown,800 Psi secondary-to-primary Hydrostatic Leak Test of B Steam Generator Revealed Tube R23C44 Leaking,Tube R8C37 Wet & Plug End R23C50 Wet.Tube Holes Will Be Weld Plugged | /01T-0:on 800311,during shutdown,800 Psi secondary-to-primary Hydrostatic Leak Test of B Steam Generator Revealed Tube R23C44 Leaking,Tube R8C37 Wet & Plug End R23C50 Wet.Tube Holes Will Be Weld Plugged | |
| 05000301/LER-1980-002, Updated LER 80-002/01T-1:on 800227,during Normal Operation, Indication of Increasing primary-to-secondary Leak in a Steam Generator Noted.Caused by Leaking Tube in a Steam Generator Position R18C37 | Updated LER 80-002/01T-1:on 800227,during Normal Operation, Indication of Increasing primary-to-secondary Leak in a Steam Generator Noted.Caused by Leaking Tube in a Steam Generator Position R18C37 | |
| 05000266/LER-1980-003, Forwards LER 80-003/03T-0 | Forwards LER 80-003/03T-0 | |
| 05000301/LER-1980-003, Forwards LER 80-003/01T-0 | Forwards LER 80-003/01T-0 | |
| 05000266/LER-1980-003-03, /03T-0:on 800318,during post-mod Testing of Containment Spray Sys,Relay 1CSB Would Not Latch.Caused by Latching Mechanism Misalignment.Latch Adjusted & Proper Operation Verified on 800318.Similar Relay Bench Tested | /03T-0:on 800318,during post-mod Testing of Containment Spray Sys,Relay 1CSB Would Not Latch.Caused by Latching Mechanism Misalignment.Latch Adjusted & Proper Operation Verified on 800318.Similar Relay Bench Tested | |
| 05000301/LER-1980-003-01, /01T-0:on 800408,while Testing Pressurizer Logic Channels,Pressurizer Level Channel 427 Was Momentarily Failed Low by Instrumentation & Control Technicians.Caused by Personnel Error.Event Discussed W/Personnel | /01T-0:on 800408,while Testing Pressurizer Logic Channels,Pressurizer Level Channel 427 Was Momentarily Failed Low by Instrumentation & Control Technicians.Caused by Personnel Error.Event Discussed W/Personnel | |
| 05000266/LER-1980-004, Forwards LER 80-004/03L-0 | Forwards LER 80-004/03L-0 | |
| 05000301/LER-1980-004-03, /03L-0:on 800417,during Seismic Analysis of as-built safety-related Sys Per IE Bulletin 79-14, Discovered Overstressed Condition in Component Cooling Sys Piping.Caused by Lack of Support Upstream of Juncture | /03L-0:on 800417,during Seismic Analysis of as-built safety-related Sys Per IE Bulletin 79-14, Discovered Overstressed Condition in Component Cooling Sys Piping.Caused by Lack of Support Upstream of Juncture | |
| 05000301/LER-1980-004, Forwards LER 80-004/03L-0 | Forwards LER 80-004/03L-0 | |
| 05000266/LER-1980-004-03, /03L-0:on 800409,w/plant at Normal Steady State, Emergency Diesel Generator Failed to Start During Routine Surveillance Test.Second Attempt Unsuccessful.Caused by Broken Vane in Starting Air Motor.Air Motor Replaced | /03L-0:on 800409,w/plant at Normal Steady State, Emergency Diesel Generator Failed to Start During Routine Surveillance Test.Second Attempt Unsuccessful.Caused by Broken Vane in Starting Air Motor.Air Motor Replaced | |
| 05000266/LER-1980-005, Forwards LER 80-005/03L-0 | Forwards LER 80-005/03L-0 | |
| 05000266/LER-1980-005-03, /03L-0:on 800417,during Normal Operation,Review of Security Logs Revealed That Designated Fire Brigade Was Below Min Supervision Requirements on Three Occasions.Caused by Operations Personnel Designation Error | /03L-0:on 800417,during Normal Operation,Review of Security Logs Revealed That Designated Fire Brigade Was Below Min Supervision Requirements on Three Occasions.Caused by Operations Personnel Designation Error | |
| 05000301/LER-1980-005-03, /03L-0:on 800609,during Training Walkdown of Safeguards Electrical Supply Cabinets,Noted That Tie Breaker Between AO5 & AO6 Safeguards Buses Was Shut.Probably Caused by Improper Electrical Lineup After Loss of Ac Test | /03L-0:on 800609,during Training Walkdown of Safeguards Electrical Supply Cabinets,Noted That Tie Breaker Between AO5 & AO6 Safeguards Buses Was Shut.Probably Caused by Improper Electrical Lineup After Loss of Ac Test | |
| 05000301/LER-1980-005, Forwards LER 80-005/03L-0 | Forwards LER 80-005/03L-0 | |
| 05000266/LER-1980-006-03, /03L-0:on 800417,during Analysis of as-built safety-related Piping Sys Per IE Bulletin 79-14,overstressed Condition Discovered in Cooling Sys Piping.Caused by Lack of Support Between Valves Upstream of Juncture | /03L-0:on 800417,during Analysis of as-built safety-related Piping Sys Per IE Bulletin 79-14,overstressed Condition Discovered in Cooling Sys Piping.Caused by Lack of Support Between Valves Upstream of Juncture | |
| 05000301/LER-1980-006-01, /01T-0:on 800617,during Safeguards Logic Test W/ One Emergency Diesel Generator Out of Svc,Auto Containment Spray Pump Actuation Threatened During Loss of Ac & high- High Containment Pressure.Caused by Personnel Error | /01T-0:on 800617,during Safeguards Logic Test W/ One Emergency Diesel Generator Out of Svc,Auto Containment Spray Pump Actuation Threatened During Loss of Ac & high- High Containment Pressure.Caused by Personnel Error | |
| 05000301/LER-1980-006, Forwards LER 80-006/01T-0 | Forwards LER 80-006/01T-0 | |
| 05000266/LER-1980-006, Forwards LER 80-006/03L-0 | Forwards LER 80-006/03L-0 | |
| 05000301/LER-1980-007-01, /01T-0:on 800619,at Full Power,Test IT-04 Was Performed W/Emergency Diesel Generator 3D Out of Svc. Emergency Safeguards Train Equipment Would Have Been Inoperable on Loss of Ac Power.Caused by Personnel Error | /01T-0:on 800619,at Full Power,Test IT-04 Was Performed W/Emergency Diesel Generator 3D Out of Svc. Emergency Safeguards Train Equipment Would Have Been Inoperable on Loss of Ac Power.Caused by Personnel Error | |
| 05000266/LER-1980-007, Forwards LER 80-007/01T-0 | Forwards LER 80-007/01T-0 | |
| 05000266/LER-1980-007-01, /01T-0:on 800611,blue Instrument Bus 1Y02 Was de-energized,resulting in de-energization of 3 Containment Pressure Channels.Caused by Personnel Error.Power Restored & Instrumentation Returned to Normal | /01T-0:on 800611,blue Instrument Bus 1Y02 Was de-energized,resulting in de-energization of 3 Containment Pressure Channels.Caused by Personnel Error.Power Restored & Instrumentation Returned to Normal | |
| 05000301/LER-1980-007, Forwards LER 80-007/01T-0 | Forwards LER 80-007/01T-0 | |
| 05000266/LER-1980-008, Forwards LER 80-008/03L-0 | Forwards LER 80-008/03L-0 | |
| 05000266/LER-1980-008-03, /03L-0:on 800606,during Normal Operation,Testing Revealed That Relay 1-247/AO2X in Train B Would Not Drop Out to Initiate Undervoltage Trip Function.Cause Not Determined. Relay Replaced & Tested Satisfactorily | /03L-0:on 800606,during Normal Operation,Testing Revealed That Relay 1-247/AO2X in Train B Would Not Drop Out to Initiate Undervoltage Trip Function.Cause Not Determined. Relay Replaced & Tested Satisfactorily | |
| 05000301/LER-1980-008, Forwards LER 80-008/01T-0 | Forwards LER 80-008/01T-0 | |
| 05000301/LER-1980-008-01, /01T-0:on 800912,following Trip from Full Power, Main Steam Stop Valve B Failed to Close Upon Receiving Close Signal.Caused by Deposit Buildup on Valve Shaft &/Or Hardening of Gland Packing | /01T-0:on 800912,following Trip from Full Power, Main Steam Stop Valve B Failed to Close Upon Receiving Close Signal.Caused by Deposit Buildup on Valve Shaft &/Or Hardening of Gland Packing | |
| 05000301/LER-1980-009, Forwards LER 80-009/03L-0 | Forwards LER 80-009/03L-0 | |
| 05000301/LER-1980-009-03, /03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily | /03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily | |
| 05000266/LER-1980-009, Forwards LER 80-009/01T-0 | Forwards LER 80-009/01T-0 | |
| 05000266/LER-1980-009-01, /01T-0:on 800728 While in Cold Shutdown & During Hydrostatic Leak Test of Steam Generators,Two Dripping Explosive Plugs & Two Wet End Plugs Noted.Cause Not Stated. Dripping Plugs Weld Repaired | /01T-0:on 800728 While in Cold Shutdown & During Hydrostatic Leak Test of Steam Generators,Two Dripping Explosive Plugs & Two Wet End Plugs Noted.Cause Not Stated. Dripping Plugs Weld Repaired | |
| 05000266/LER-1980-010-03, /03L-0:on 800827,during Normal Operation,After Redundant Containment Spray Pump Recirculation Phase Suction Valve Maint,Operability Test Was Not Performed.Caused by Personnel Failure to Fully Comprehend Maint Procedures | /03L-0:on 800827,during Normal Operation,After Redundant Containment Spray Pump Recirculation Phase Suction Valve Maint,Operability Test Was Not Performed.Caused by Personnel Failure to Fully Comprehend Maint Procedures | |
| 05000266/LER-1980-010, Forwards LER 80-010/03L-0 | Forwards LER 80-010/03L-0 | |
| 05000301/LER-1980-010, Forwards LER 80-010/03L-0 | Forwards LER 80-010/03L-0 | |
| 05000301/LER-1980-010-03, /03L-0:on 801117,safety Injection Pump 2P15A Motor & Pump Shaft to Coupling Keys Found to Be Sheared.Cause Undetermined.Pump & Motor Checked for Damage,Keys Replaced & Pump Operability Verified | /03L-0:on 801117,safety Injection Pump 2P15A Motor & Pump Shaft to Coupling Keys Found to Be Sheared.Cause Undetermined.Pump & Motor Checked for Damage,Keys Replaced & Pump Operability Verified | |
| 05000301/LER-1980-011-03, /03L-0:on 801118,axial Flux Difference Deviated from Target Band.Caused by Improper Interpretation of Tech Specs Resulting in Failure to Lower High Neutron Flux Setpoint.Instruction Clarified | /03L-0:on 801118,axial Flux Difference Deviated from Target Band.Caused by Improper Interpretation of Tech Specs Resulting in Failure to Lower High Neutron Flux Setpoint.Instruction Clarified | |
| 05000301/LER-1980-011, Forwards LER 80-011/03L-0 | Forwards LER 80-011/03L-0 | |
| 05000266/LER-1980-011, Forwards LER 80-011/03L-0 | Forwards LER 80-011/03L-0 | |
| 05000266/LER-1980-011-03, /03L-0:on 800926,found That,Aug 1977-Sept 1980, Containment Spray Sys Spray Additive Valves Were Tested Per ASME Program Requirements Instead of Per Tech Specs.Caused by Administrative Error Re NRC | /03L-0:on 800926,found That,Aug 1977-Sept 1980, Containment Spray Sys Spray Additive Valves Were Tested Per ASME Program Requirements Instead of Per Tech Specs.Caused by Administrative Error Re NRC | |
| 05000266/LER-1980-012, Forwards LER 80-012/03L-0 | Forwards LER 80-012/03L-0 | |
| 05000266/LER-1980-012-03, /03L-0:on 801005,logs Showed Decrease in Holdup Tank Pressure During 801002-05.Evaluation Showed Leak on Compression Fitting on Inlet to Valve IPCV-1022C.Caused by Improper Reinstallation of Valve After Cleaning | /03L-0:on 801005,logs Showed Decrease in Holdup Tank Pressure During 801002-05.Evaluation Showed Leak on Compression Fitting on Inlet to Valve IPCV-1022C.Caused by Improper Reinstallation of Valve After Cleaning | |
| 05000301/LER-1980-012, Forwards LER 80-012/03L-0 | Forwards LER 80-012/03L-0 | |
| 05000301/LER-1980-012-03, /03L-0:on 801202,slippage Found in Shaft Driven Seal Water Pump Impeller Resulting in Overheating of Throttle Bushing.Caused by Reduced Seal Water Flow Due to Loosening of Pumping Ring.Shaft Sleeve & Bushing Replaced | /03L-0:on 801202,slippage Found in Shaft Driven Seal Water Pump Impeller Resulting in Overheating of Throttle Bushing.Caused by Reduced Seal Water Flow Due to Loosening of Pumping Ring.Shaft Sleeve & Bushing Replaced | |
| 05000266/LER-1980-013, Forwards LER 80-013/01T-0 | Forwards LER 80-013/01T-0 | |
| 05000266/LER-1980-013-01, /01T-0:on 801113,suction to 1P4B Boric Acid Transfer Pump Isolated,Rendering Pump Inoperable.Probably Caused by Personnel Error in Returning Valve Lineup to Normal Following Recirculation & Sampling | /01T-0:on 801113,suction to 1P4B Boric Acid Transfer Pump Isolated,Rendering Pump Inoperable.Probably Caused by Personnel Error in Returning Valve Lineup to Normal Following Recirculation & Sampling | |
