| | | Reporting criterion |
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| 05000285/LER-1979-001, Forwards LER 79-001/01T-0 | Forwards LER 79-001/01T-0 | |
| 05000285/LER-1979-001-01, /01T-0 on 790118:during Check of Diesel Driven Fire Pump,Engine Cooling Fluid Boiled Out of Holding Tank. Diesel Engine Cooling Sys Refilled & Manual Isolation Valve Found Closed.Valve Opened & Fire Pump Returned to Svc | /01T-0 on 790118:during Check of Diesel Driven Fire Pump,Engine Cooling Fluid Boiled Out of Holding Tank. Diesel Engine Cooling Sys Refilled & Manual Isolation Valve Found Closed.Valve Opened & Fire Pump Returned to Svc | |
| 05000285/LER-1979-002-03, /03L-0 on 790117:reactor Protective Sys for Axial Power Distribution Channel a Trip Setpoint Fluctuated Nonconservatively.Caused by Bell & Howell Potentiometer Module Part 384612/001 Failure | /03L-0 on 790117:reactor Protective Sys for Axial Power Distribution Channel a Trip Setpoint Fluctuated Nonconservatively.Caused by Bell & Howell Potentiometer Module Part 384612/001 Failure | |
| 05000285/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000285/LER-1979-003, Forwards LER 79-003/03L-1 | Forwards LER 79-003/03L-1 | |
| 05000285/LER-1979-003-03, /03L-1 on 790127:during Containment Pressure Release,Containment Air Monitor Readings Were Abnormally Low.Caused by Closed Isolation Valves.Containment Ventilation Valves Were Closed & Pressure Valves Opened | /03L-1 on 790127:during Containment Pressure Release,Containment Air Monitor Readings Were Abnormally Low.Caused by Closed Isolation Valves.Containment Ventilation Valves Were Closed & Pressure Valves Opened | |
| 05000285/LER-1979-004-01, /01T-0 on 790226:during Containment Insp After Outage,Weld Leak Discovered on Controlled bleed-off Line on Reactor Coolant Pump RC-3C.Caused by Vibration Induced Fatigue.Repairs Performed | /01T-0 on 790226:during Containment Insp After Outage,Weld Leak Discovered on Controlled bleed-off Line on Reactor Coolant Pump RC-3C.Caused by Vibration Induced Fatigue.Repairs Performed | |
| 05000285/LER-1979-004, Forwards LER 79-004/01T-0 | Forwards LER 79-004/01T-0 | |
| 05000285/LER-1979-005-03, /03L-0 on 790226:at 15% Power C Channel Loss of Load Trip Did Not Annunciate.Caused by Bistable Multivibrator Set to 18.1%.Bistable Reset & Surveillance Test Performed | /03L-0 on 790226:at 15% Power C Channel Loss of Load Trip Did Not Annunciate.Caused by Bistable Multivibrator Set to 18.1%.Bistable Reset & Surveillance Test Performed | |
| 05000285/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000285/LER-1979-007-01, /01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded | /01T-3:on 800305,during Review Required by IE Bulletin 79-01,Barksdale Pressure Switch Not Found Environmentally Qualified.Caused by Switch Not Being Properly Specified for Intended Svc.Switch Will Be Upgraded | |
| 05000285/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000285/LER-1979-008-03, /03L-0 on 790321:during Normal Operation,Loop Safety Injection Valve Failed to Open from Lockout Relay Activation.Caused by Dirty Auxiliary Interlock Switch. Switch Cleaned | /03L-0 on 790321:during Normal Operation,Loop Safety Injection Valve Failed to Open from Lockout Relay Activation.Caused by Dirty Auxiliary Interlock Switch. Switch Cleaned | |
| 05000285/LER-1979-013-03, /03L-0 on 790625:during Normal Operation,Hot Leg Temp Indications C/TI-122H Failed Low.Caused by Power Supply Failure Due to Blown Fuse.Ge/Mac Power Supply Model GR700 Replaced & Sys Returned to Normal | /03L-0 on 790625:during Normal Operation,Hot Leg Temp Indications C/TI-122H Failed Low.Caused by Power Supply Failure Due to Blown Fuse.Ge/Mac Power Supply Model GR700 Replaced & Sys Returned to Normal | |
| 05000285/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000285/LER-1979-014, Forwards LER 79-014/01T-0 | Forwards LER 79-014/01T-0 | |
| 05000285/LER-1979-014-01, /01T-0 on 790515:ASCO Solenoid Valves Lacked Sufficient Environ Qualification Data.Caused by Inadequate Specs During Design & Installation Period.Valves Will Be Replaced Following 1980 Refueling Outage | /01T-0 on 790515:ASCO Solenoid Valves Lacked Sufficient Environ Qualification Data.Caused by Inadequate Specs During Design & Installation Period.Valves Will Be Replaced Following 1980 Refueling Outage | |
| 05000285/LER-1979-015, Forwards LER 79-015/01T-0 | Forwards LER 79-015/01T-0 | |
| 05000285/LER-1979-015-01, /01T-0 on 790511:seismic Support Appeared Inadequate for Component Cooling Water piping-to-containment Cooling & Filtering Unit VA-3A.Analyses Indicated That Clamping piping-to-cooling Unit Will Provide Needed Support | /01T-0 on 790511:seismic Support Appeared Inadequate for Component Cooling Water piping-to-containment Cooling & Filtering Unit VA-3A.Analyses Indicated That Clamping piping-to-cooling Unit Will Provide Needed Support | |
| 05000285/LER-1979-016-01, /01T-0 on 790517:testing on First Removed Irradiated Surveillance Capsule Showed Higher than Predicted Nil Ductility Transition Temp New Pressure.Temp Limitation Curves Have Been Developed | /01T-0 on 790517:testing on First Removed Irradiated Surveillance Capsule Showed Higher than Predicted Nil Ductility Transition Temp New Pressure.Temp Limitation Curves Have Been Developed | |
| 05000285/LER-1979-016, Forwards LER 79-016/01T-0 | Forwards LER 79-016/01T-0 | |
| 05000285/LER-1979-017-03, /03L-0 on 790724:during Normal Operation,D Channel Wide Range Nuclear Instrumentation Failed W/Complete Loss of Power.Caused by Blown Main Power Fuses.Fuses Replaced & Instrumentation Placed in Svc | /03L-0 on 790724:during Normal Operation,D Channel Wide Range Nuclear Instrumentation Failed W/Complete Loss of Power.Caused by Blown Main Power Fuses.Fuses Replaced & Instrumentation Placed in Svc | |
| 05000285/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000285/LER-1979-018, Forwards LER 79-018/03L-0 | Forwards LER 79-018/03L-0 | |
| 05000285/LER-1979-018-03, /03L-0 on 790724:steam Generator a Pressure Indicator Ccontroller for C Channel Would Not Reset.Caused by Failure of Sigma Meter Integrally Installed Trip Setpoint.Trip Circuit Replaced & Meter Calibr | /03L-0 on 790724:steam Generator a Pressure Indicator Ccontroller for C Channel Would Not Reset.Caused by Failure of Sigma Meter Integrally Installed Trip Setpoint.Trip Circuit Replaced & Meter Calibr | |
| 05000285/LER-1979-019-03, /03L-0:on 791005,during Normal Rotation of Component Cooling Water Heat Exchangers,Inlet Valve Would Not Operate from Control Room Remote Switch.Caused by Failed Plastic Piston Assembly in Actuator.Assembly Replaced | /03L-0:on 791005,during Normal Rotation of Component Cooling Water Heat Exchangers,Inlet Valve Would Not Operate from Control Room Remote Switch.Caused by Failed Plastic Piston Assembly in Actuator.Assembly Replaced | |
| 05000285/LER-1979-020, Forwards LER 79-020/03L-0 | Forwards LER 79-020/03L-0 | |
| 05000285/LER-1979-020-03, /03L-0:on 791031,during Insps of Accessible Piping,Eight Snubbers on Safety Injection Sys Piping Found Inoperable.Caused by Improper Installation of Anchor Bolts. Base Plate Redesigned & Anchor Bolts Reinstalled | /03L-0:on 791031,during Insps of Accessible Piping,Eight Snubbers on Safety Injection Sys Piping Found Inoperable.Caused by Improper Installation of Anchor Bolts. Base Plate Redesigned & Anchor Bolts Reinstalled | |
| 05000285/LER-1979-021-21, /21L-0:on 791106,during Insp Required by IE Bulletin 79-14 Re safety-related Piping Sys,Discrepancies Found Between Design Documents & as-built Configuration of Seismic Restraints.Caused by Probable QC Installation Error | /21L-0:on 791106,during Insp Required by IE Bulletin 79-14 Re safety-related Piping Sys,Discrepancies Found Between Design Documents & as-built Configuration of Seismic Restraints.Caused by Probable QC Installation Error | |
| 05000285/LER-1979-021, Forwards LER 79-021/21L-0 | Forwards LER 79-021/21L-0 | |
