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| 05000334/LER-1980-001-01, /01T-1:on 870626,discovered That Suction Piping on Vacuum Pump Not Adequately Supported for Seismic Event. Caused by Inaccurate Computer Code Used.Seismically Inadequate Piping Isolated & Support Added | /01T-1:on 870626,discovered That Suction Piping on Vacuum Pump Not Adequately Supported for Seismic Event. Caused by Inaccurate Computer Code Used.Seismically Inadequate Piping Isolated & Support Added | |
| 05000334/LER-1980-001, Forwards LER 80-001/01T-0 | Forwards LER 80-001/01T-0 | |
| 05000334/LER-1980-002, Forwards LER 80-002/01T-0 | Forwards LER 80-002/01T-0 | |
| 05000334/LER-1980-002-01, /01T-0:on 800117,during Operational Mode 5,w/RCS Temp at 100 F & Atmospheric Pressure & RCS Level mid-loop W/ RHR Flow at 1,700 Gpm,Reactor Vessel Vent Educator Was in Svc,Causing Negative Pressure | /01T-0:on 800117,during Operational Mode 5,w/RCS Temp at 100 F & Atmospheric Pressure & RCS Level mid-loop W/ RHR Flow at 1,700 Gpm,Reactor Vessel Vent Educator Was in Svc,Causing Negative Pressure | |
| 05000334/LER-1980-003-01, /01T-0:on 800124,overstress Condition Was Confirmed to Exist During Postulated Seismic Event W/Pipe Support H-95 on Component Cooling Water Sys Line CC-323. Caused by Use of Incorrect Method of Pipe Stress Analysis | /01T-0:on 800124,overstress Condition Was Confirmed to Exist During Postulated Seismic Event W/Pipe Support H-95 on Component Cooling Water Sys Line CC-323. Caused by Use of Incorrect Method of Pipe Stress Analysis | |
| 05000334/LER-1980-004-03, /03L-0:on 800123,radiation Monitor Setpoints Less Conservative than Those Required in Mode 6 During Refueling Operations.Caused by Personnel Error.Reactor Vessel Head Studs Detensioned | /03L-0:on 800123,radiation Monitor Setpoints Less Conservative than Those Required in Mode 6 During Refueling Operations.Caused by Personnel Error.Reactor Vessel Head Studs Detensioned | |
| 05000334/LER-1980-005-03, /03L-0:on 800112,decontamination Proceedings Were in Progress When Waste Water Tank Filled.Operator Instructed to Do Valving in Area Was Not Familiar W/Tech Specs & Failed to Have Radiation Technician or Ratemeter Available | /03L-0:on 800112,decontamination Proceedings Were in Progress When Waste Water Tank Filled.Operator Instructed to Do Valving in Area Was Not Familiar W/Tech Specs & Failed to Have Radiation Technician or Ratemeter Available | |
| 05000334/LER-1980-006-04, /04T-0:on 800130,tritium Activity in Quarterly Grab Samples Collected in Oh River Near Facility Discharge During Fourth quarter,1979 Exceeded ETS But Below 10CFR20 Limits | /04T-0:on 800130,tritium Activity in Quarterly Grab Samples Collected in Oh River Near Facility Discharge During Fourth quarter,1979 Exceeded ETS But Below 10CFR20 Limits | |
| 05000334/LER-1980-007-01, Er 80-007/01T-0:on 800121,during Reload After Defueling, Main Filter Banks Found Not in Svc.Caused by Procedural Inadequacy Because None of Refueling Checklists Indicated Tech Spec Change That Required Flow | Er 80-007/01T-0:on 800121,during Reload After Defueling, Main Filter Banks Found Not in Svc.Caused by Procedural Inadequacy Because None of Refueling Checklists Indicated Tech Spec Change That Required Flow | |
| 05000334/LER-1980-008, Forwards LER 80-008/01T-1 | Forwards LER 80-008/01T-1 | |
| 05000334/LER-1980-008-01, /01T-1:on 800225,during in-plant Insp,Potential Overstress Condition of Cable Spreading Room Floor Indicated Due to Postulated Seismic Loading.Caused by Utilizing Underside of Floor to Higher Degree than Original Design | /01T-1:on 800225,during in-plant Insp,Potential Overstress Condition of Cable Spreading Room Floor Indicated Due to Postulated Seismic Loading.Caused by Utilizing Underside of Floor to Higher Degree than Original Design | |
| 05000334/LER-1980-009, Forwards LER 80-009/03L-0 | Forwards LER 80-009/03L-0 | |
| 05000334/LER-1980-009-03, /03L-0:on 800201,loss of Power Occurred on 138 Kv Bus 1.Emergency Diesel Generator 1 auto-started on Loss of Offsite Power to 4160-volt 1A Station Svc Transformer.Caused by Faulty Backup Relay Timer | /03L-0:on 800201,loss of Power Occurred on 138 Kv Bus 1.Emergency Diesel Generator 1 auto-started on Loss of Offsite Power to 4160-volt 1A Station Svc Transformer.Caused by Faulty Backup Relay Timer | |
| 05000334/LER-1980-010-03, /03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed | /03L-0:on 800131,refueling Team Was Given Go Ahead for Core Alterations.Fifteen Minutes Later,Inservice Boric Acid Transfer Pump CH-P-2B Tripped on Thermal Overload. Probably Caused by Faulty Blender Controls Shifting Speed | |
| 05000334/LER-1980-011-03, /03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A | /03L-0:on 800226,during Boron Injection Flow Path Verification,Operator Stroked MOV-SI-869A Connecting Charge Sys Fill Header to RCS Hot Leg Piping.Valve Opened & Linestarter Tripped.Caused by Burnt Motor in MOV-SI-869A | |
| 05000334/LER-1980-012-01, /01T-0:on 800312,emergency Shutdown Panel Auxiliary Feedwater Flow Instrumentation Readings Were Deleted from Surveillance Testing.Caused by Meter Reading Zero in Standby | /01T-0:on 800312,emergency Shutdown Panel Auxiliary Feedwater Flow Instrumentation Readings Were Deleted from Surveillance Testing.Caused by Meter Reading Zero in Standby | |
| 05000334/LER-1980-013-04, /04T-0:on 800302,during Maint Surveillance,Cooling Tower Blowdown Temp Indicator Found Out of Calibr.Caused by Instrument Drift.Instrument Recalibr | /04T-0:on 800302,during Maint Surveillance,Cooling Tower Blowdown Temp Indicator Found Out of Calibr.Caused by Instrument Drift.Instrument Recalibr | |
| 05000334/LER-1980-013, Forwards LER 80-013/04T-0 | Forwards LER 80-013/04T-0 | |
| 05000334/LER-1980-014-04, /04T-0:800307,during Radiation Monitor Surveillance Test,Liquid Waste Effluent Monitor Did Not Alarm & Discharge Valve Did Not Close.Caused by Loose Relay & Solder Joints in Wiring.Deficiencies Corrected | /04T-0:800307,during Radiation Monitor Surveillance Test,Liquid Waste Effluent Monitor Did Not Alarm & Discharge Valve Did Not Close.Caused by Loose Relay & Solder Joints in Wiring.Deficiencies Corrected | |
| 05000334/LER-1980-015-04, /04T-0:800308,during Radiation Monitor Surveillance Test,Component Cooling Water Radiation Monitor high-high Level Alarm Did Not Function.Caused by Alarm Potentiometer Out of Adjustment | /04T-0:800308,during Radiation Monitor Surveillance Test,Component Cooling Water Radiation Monitor high-high Level Alarm Did Not Function.Caused by Alarm Potentiometer Out of Adjustment | |
| 05000334/LER-1980-016-03, /03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered | /03L-0:on 800311,while Testing Battery Charger 2, Ac Input Breaker Tripped.Caused by Loose Control Wiring. Loose Wires Resoldered | |
| 05000334/LER-1980-017-01, /01T-0:on 800326,reanalysis of Seismic Pipe Stress of Main Steam Piping Inside Valve House for OBE long-term Criteria Showed,For Some Conditions,Allowable Stress Level May Be Exceeded in Headers for Main Steam Relief Valves | /01T-0:on 800326,reanalysis of Seismic Pipe Stress of Main Steam Piping Inside Valve House for OBE long-term Criteria Showed,For Some Conditions,Allowable Stress Level May Be Exceeded in Headers for Main Steam Relief Valves | |
| 05000334/LER-1980-017, Updated LER 80-017/01T-1:on 800326,reanalysis of Piping & Supports for Main Steam Sys Outside Containment Revealed Design Deficiencies If All Five Safety Relief Valves Opened on Any Manifold.Caused by Load Resulting from Open V | Updated LER 80-017/01T-1:on 800326,reanalysis of Piping & Supports for Main Steam Sys Outside Containment Revealed Design Deficiencies If All Five Safety Relief Valves Opened on Any Manifold.Caused by Load Resulting from Open Valves | |
| 05000334/LER-1980-018-01, /01T-0:on 800326,plant Operators Were Testing Temporary Fire Pump When Section of Fire Main Failed.Caused by Piping Failure.Failed Section of Piping Replaced | /01T-0:on 800326,plant Operators Were Testing Temporary Fire Pump When Section of Fire Main Failed.Caused by Piping Failure.Failed Section of Piping Replaced | |
| 05000334/LER-1980-019-03, /03L-0:on 800310,while Steam Flushing,Crack Found in Channel Head of Liquid Waste Evaporator Bottoms Heat Exchanger.Caused by Equipment Failure,Probably Due to Chloride Stress Corrosion.Sleeve Welded Over Channel Head | /03L-0:on 800310,while Steam Flushing,Crack Found in Channel Head of Liquid Waste Evaporator Bottoms Heat Exchanger.Caused by Equipment Failure,Probably Due to Chloride Stress Corrosion.Sleeve Welded Over Channel Head | |
| 05000334/LER-1980-020, Forwards LER 80-020/03L-0 | Forwards LER 80-020/03L-0 | |
| 05000334/LER-1980-020-03, /03L-0:on 800329,during Operations to Increase Level in RCS Loops,Vol Control Tank Outlet MOV-CH-115C Found Closed.Vol Control Tank Level Indicated Normally.Caused by Bad Fuse Holder for Level Bistable.Fuse Holder Replaced | /03L-0:on 800329,during Operations to Increase Level in RCS Loops,Vol Control Tank Outlet MOV-CH-115C Found Closed.Vol Control Tank Level Indicated Normally.Caused by Bad Fuse Holder for Level Bistable.Fuse Holder Replaced | |
| 05000334/LER-1980-021, Has Been Cancelled | Has Been Cancelled | |
| 05000334/LER-1980-022, Forwards LER 80-022/01T-0 | Forwards LER 80-022/01T-0 | |
| 05000334/LER-1980-022-01, /01T-0:on 800408,while Attempting to Increase RHR Flow to Tech Spec Value Required for Dilution,Total Loss of Flow Was Experienced.Caused by Pump Not Being Vented When Flow Increase Was Initiated.Operating Procedures Revised | /01T-0:on 800408,while Attempting to Increase RHR Flow to Tech Spec Value Required for Dilution,Total Loss of Flow Was Experienced.Caused by Pump Not Being Vented When Flow Increase Was Initiated.Operating Procedures Revised | |
| 05000334/LER-1980-023, Forwards LER 80-023/01T-0 | Forwards LER 80-023/01T-0 | |
| 05000334/LER-1980-023-01, /01T-0:on 800411,during Operational Mode 5,w/ Steam Generators Drained & RCS Level mid-span in Loops, Complete Loss of RHR Flow Occurred While Plant Operators Were Increasing RHR Heat Exchanger Flow | /01T-0:on 800411,during Operational Mode 5,w/ Steam Generators Drained & RCS Level mid-span in Loops, Complete Loss of RHR Flow Occurred While Plant Operators Were Increasing RHR Heat Exchanger Flow | |
| 05000334/LER-1980-024-03, /03L-0:on 780428,audit Revealed That Weekly Surveillance Tests on Boric Acid Pumps Missed During Wk of 780810.Caused by Operator Error Due to Confusion Between Modes.Test Scheduling Mods Have Been Made | /03L-0:on 780428,audit Revealed That Weekly Surveillance Tests on Boric Acid Pumps Missed During Wk of 780810.Caused by Operator Error Due to Confusion Between Modes.Test Scheduling Mods Have Been Made | |
| 05000334/LER-1980-024, Forwards LER 80-024/03L-0 | Forwards LER 80-024/03L-0 | |
| 05000334/LER-1980-025-01, /01T-0:on 800415,during Tank Mod Project,Weld on 12-inch Nozzle Penetration to Refueling Water Storage Tank OS-TK-1 Reported Not to Be in Conformance W/Design.Caused by Failure of Manufacturer to Follow Drawings | /01T-0:on 800415,during Tank Mod Project,Weld on 12-inch Nozzle Penetration to Refueling Water Storage Tank OS-TK-1 Reported Not to Be in Conformance W/Design.Caused by Failure of Manufacturer to Follow Drawings | |
| 05000334/LER-1980-025, Forwards LER 80-025/01T-0 | Forwards LER 80-025/01T-0 | |
| 05000334/LER-1980-026, Forwards LER 80-026/03L-0 | Forwards LER 80-026/03L-0 | |
| 05000334/LER-1980-026-03, /03L-0:on 800422,pump Being Used to Start Liquid Waste Discharge Observed to Have Higher than Normal Flow. Caused by Leaking Effluent Valves.Corrective Actions Scheduled to Be Completed as Soon as Possible | /03L-0:on 800422,pump Being Used to Start Liquid Waste Discharge Observed to Have Higher than Normal Flow. Caused by Leaking Effluent Valves.Corrective Actions Scheduled to Be Completed as Soon as Possible | |
| 05000334/LER-1980-027-03, During Maint of Diesel Generator Lube Oil Cooler,Internals of River Water Check Valve Discovered in Cooler.Caused by Flutter Due to High Flow Conditions Eroding Hinge Pin Guide.Valve Replaced | During Maint of Diesel Generator Lube Oil Cooler,Internals of River Water Check Valve Discovered in Cooler.Caused by Flutter Due to High Flow Conditions Eroding Hinge Pin Guide.Valve Replaced | |
| 05000334/LER-1980-027, Forwards Updated LER 80-027/03L-1 | Forwards Updated LER 80-027/03L-1 | |
| 05000334/LER-1980-028-03, /03L-0:on 800504,power Was Lost to Vital Bus Inverter 4 Due to Blown Main Power Supply Fuse.Cause Unknown.Fuse & Rectifier Replaced.Frequency Adjusted | /03L-0:on 800504,power Was Lost to Vital Bus Inverter 4 Due to Blown Main Power Supply Fuse.Cause Unknown.Fuse & Rectifier Replaced.Frequency Adjusted | |
| 05000334/LER-1980-029, Forwards LER 80-029/03L-0 | Forwards LER 80-029/03L-0 | |
| 05000334/LER-1980-029-03, /03L-0:on 800409,during Performance of Containment Isolation Check Valves Test,Found Safety Injection Accumulator Fill Line Check Valve Opened Beyond Limits of Tech Spec.Cause Under Investigation | /03L-0:on 800409,during Performance of Containment Isolation Check Valves Test,Found Safety Injection Accumulator Fill Line Check Valve Opened Beyond Limits of Tech Spec.Cause Under Investigation | |
| 05000334/LER-1980-030-01, /01T-0:on 800519,plant Operators Testing diesel- Driven Fire Pump When High Temp Alarm Was Received & Diesel Overheated.Caused by Brittle Fan Belt Slipping | /01T-0:on 800519,plant Operators Testing diesel- Driven Fire Pump When High Temp Alarm Was Received & Diesel Overheated.Caused by Brittle Fan Belt Slipping | |
| 05000334/LER-1980-031-01, /01T-0:on 800521,upon Finding Leaking RHR Sys Vent Valve Weld,Evaluation Commenced to re-energize RHR Isolation Valve in Case of Gross Failure.Caused by de-energized Process Control Signal & Vent Weld Leak | /01T-0:on 800521,upon Finding Leaking RHR Sys Vent Valve Weld,Evaluation Commenced to re-energize RHR Isolation Valve in Case of Gross Failure.Caused by de-energized Process Control Signal & Vent Weld Leak | |
| 05000334/LER-1980-031, Forwards LER 80-031/01T-0 | Forwards LER 80-031/01T-0 | |
| 05000334/LER-1980-032-03, /03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced | /03L-0:on 800503,during Control Board Insp,Vol Control Tank Outlet Valve Was Found Shut.Caused by Short Circuited Lead in Level Comparator.Shorted Wire Replaced | |
| 05000334/LER-1980-033, Forwards LER 80-033/03L-0 | Forwards LER 80-033/03L-0 | |
| 05000334/LER-1980-033-03, /03L-0:on 800617,diesel Generator 1 Governor Control Motor Failed.Caused by Cycling of Governor While Attempting to Shut Down Diesel W/Fast Start Signal Still Applied.Motor Replaced | /03L-0:on 800617,diesel Generator 1 Governor Control Motor Failed.Caused by Cycling of Governor While Attempting to Shut Down Diesel W/Fast Start Signal Still Applied.Motor Replaced | |
| 05000334/LER-1980-034-03, /03L-0:on 800512,during Air Flow Surveillance Test on Fire Suppression Sys,Approx 50% of Sprinkler Nozzles Found Plugged.Caused by Rust & Unidentified Matl.Nozzles Will Be Cleaned & Sys Blown Down W/Air | /03L-0:on 800512,during Air Flow Surveillance Test on Fire Suppression Sys,Approx 50% of Sprinkler Nozzles Found Plugged.Caused by Rust & Unidentified Matl.Nozzles Will Be Cleaned & Sys Blown Down W/Air | |