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| 05000280/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | |
| 05000280/LER-1981-001-01, /01T-0:on 810225,w/unit Defueled for Steam Generator Replacement,Routine Testing Exam of Loop a Main Steam Piping Revealed Linear Indications.Caused by Corrosion Pitting.Subj Areas Will Be Repaired | /01T-0:on 810225,w/unit Defueled for Steam Generator Replacement,Routine Testing Exam of Loop a Main Steam Piping Revealed Linear Indications.Caused by Corrosion Pitting.Subj Areas Will Be Repaired | |
| 05000281/LER-1981-001-03, /03L-0:on 810102,one Boric Acid Flow Path to Core Inoperable.Caused by Personnel Inadvertently Closing Valve 2-CH-226.Flow Path Restored & Personnel Reinstructed | /03L-0:on 810102,one Boric Acid Flow Path to Core Inoperable.Caused by Personnel Inadvertently Closing Valve 2-CH-226.Flow Path Restored & Personnel Reinstructed | |
| 05000280/LER-1981-002-03, /03L-0:on 810122,radiation Alarm Setpoint for Component Cooling Sys Found Greater than Twice Background. Caused by Reduced Background Due to Shutdown & Defueled Conditions.Activity Levels Verified within Allowable Limits | /03L-0:on 810122,radiation Alarm Setpoint for Component Cooling Sys Found Greater than Twice Background. Caused by Reduced Background Due to Shutdown & Defueled Conditions.Activity Levels Verified within Allowable Limits | |
| 05000281/LER-1981-002-03, /03L-0:on 810105,PT-27A Revealed Loss of Heat Tracing for Panel 10 Circuits 1A & 1B & Panel 11 Circuit 4A. Caused by Open Heating Elements.Defective Heat Tracing Tape Replaced | /03L-0:on 810105,PT-27A Revealed Loss of Heat Tracing for Panel 10 Circuits 1A & 1B & Panel 11 Circuit 4A. Caused by Open Heating Elements.Defective Heat Tracing Tape Replaced | |
| 05000280/LER-1981-003-03, /03L-0:on 810129,radiation Alarm Setpoint for Component Cooling Sys Found Greater than Twice Background. Caused by Decrease in Background Radiation Levels.Activity Levels Verified within Allowable Limits | /03L-0:on 810129,radiation Alarm Setpoint for Component Cooling Sys Found Greater than Twice Background. Caused by Decrease in Background Radiation Levels.Activity Levels Verified within Allowable Limits | |
| 05000281/LER-1981-003-03, /03L-0:on 810106,liquid Radwaste Monitors RM-GW-101,102,RM-VG-103,104,RM-SW-107 & RM-LW-108 Failed Low.Caused by Failed Fuse.Fuse Replaced | /03L-0:on 810106,liquid Radwaste Monitors RM-GW-101,102,RM-VG-103,104,RM-SW-107 & RM-LW-108 Failed Low.Caused by Failed Fuse.Fuse Replaced | |
| 05000280/LER-1981-004-03, Radiation Monitoring Recorder (RR-175) Found to Be Printing Erratically.Caused by Loose Gear on Balance Motor,Allowing Drive Cable to Slip.Set Screw on Drive Gear Tightened | Radiation Monitoring Recorder (RR-175) Found to Be Printing Erratically.Caused by Loose Gear on Balance Motor,Allowing Drive Cable to Slip.Set Screw on Drive Gear Tightened | |
| 05000280/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000281/LER-1981-004-03, /03L-0:on 810107,reactor Trip Breaker a Failed to Open.Caused by Sporadic Failure of Under Voltage Device Due to Missing Bushing.Under Voltage Device Replaced | /03L-0:on 810107,reactor Trip Breaker a Failed to Open.Caused by Sporadic Failure of Under Voltage Device Due to Missing Bushing.Under Voltage Device Replaced | |
| 05000280/LER-1981-005-03, /03L-0:on 810301,radiation Monitor Recorder RR-175 Found Printing Erratically.Caused by Dirty Slidewire Resistor in Circuit That Controls Positioning of Printing Device.Resistor Cleaned & Recorder Returned to Svc | /03L-0:on 810301,radiation Monitor Recorder RR-175 Found Printing Erratically.Caused by Dirty Slidewire Resistor in Circuit That Controls Positioning of Printing Device.Resistor Cleaned & Recorder Returned to Svc | |
| 05000281/LER-1981-005-03, /03L-0:on 810204,air Motors for Preferred Start 2 of Emergency Diesel Generator 3 Found Engaged to Flywheel. Caused by Air Leakage Through Solenoid Valve.Solenoid & Air Motors Replaced | /03L-0:on 810204,air Motors for Preferred Start 2 of Emergency Diesel Generator 3 Found Engaged to Flywheel. Caused by Air Leakage Through Solenoid Valve.Solenoid & Air Motors Replaced | |
| 05000280/LER-1981-006-03, /03L-0:on 810306,alarm Setpoint for Component Cooling Water Radiation Monitor RM-CC-106 Found to Be Greater than Twice Background.Caused by Instrument Drift. Monitor Reset to Proper Setpoint & Returned to Svc | /03L-0:on 810306,alarm Setpoint for Component Cooling Water Radiation Monitor RM-CC-106 Found to Be Greater than Twice Background.Caused by Instrument Drift. Monitor Reset to Proper Setpoint & Returned to Svc | |
| 05000281/LER-1981-006-03, /03L-0:on 810114,at Full Power,C Safety Injection Accumulator Found to Have Boron Concentration of 1943 Ppm, 7 Ppm Below Required Limit.Caused by Leakage Through Check Valve 1-SI-144.Valve Isolated | /03L-0:on 810114,at Full Power,C Safety Injection Accumulator Found to Have Boron Concentration of 1943 Ppm, 7 Ppm Below Required Limit.Caused by Leakage Through Check Valve 1-SI-144.Valve Isolated | |
| 05000280/LER-1981-007-03, W/Unit 1 Defueled & 2 at 100% Power,Power for Several Radiation Monitors Lost.Caused by Shorting of Test Lead to Ground Causing Supply Fuse to Blow.Fuse Replaced.Monitors Returned to Svc | W/Unit 1 Defueled & 2 at 100% Power,Power for Several Radiation Monitors Lost.Caused by Shorting of Test Lead to Ground Causing Supply Fuse to Blow.Fuse Replaced.Monitors Returned to Svc | |
| 05000281/LER-1981-007-03, /03L-0:on 810114,at 100% power,PT-27 (Heat Tracing) Revealed Amp Readings for Panels 8 & 9 Circuits Were Below Acceptance Criteria.Caused by Excessive Temps Breaking Down Insulation.Defective Heat Tracing Replaced | /03L-0:on 810114,at 100% power,PT-27 (Heat Tracing) Revealed Amp Readings for Panels 8 & 9 Circuits Were Below Acceptance Criteria.Caused by Excessive Temps Breaking Down Insulation.Defective Heat Tracing Replaced | |
| 05000281/LER-1981-008-03, /03L-0:on 810206,output Amperage for RM-CC-106 Reduced in Nonconservative Direction.Caused by Failed Remote Indicator Module in Auxiliary Bldg.Module Isolated & RM-CC-106 Recalibr.Monitor Will Be Repaired | /03L-0:on 810206,output Amperage for RM-CC-106 Reduced in Nonconservative Direction.Caused by Failed Remote Indicator Module in Auxiliary Bldg.Module Isolated & RM-CC-106 Recalibr.Monitor Will Be Repaired | |
| 05000280/LER-1981-008-03, /03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified | /03L-0:on 810410,process Vent Radiation Monitor Found Inoperable.Caused by Broken Pump Drive Belt Due to Misalignment.Drive Belt Replaced & Radiation Monitor Operability Verified | |
| 05000280/LER-1981-009-01, /01T-0:on 810522,Westinghouse Identified Potential Sys Interaction Involving Vol Control Tank Level Control Sys & Charging Pumps.Caused by Design Criteria Misinterpretation.Procedure Mods Will Be Made | /01T-0:on 810522,Westinghouse Identified Potential Sys Interaction Involving Vol Control Tank Level Control Sys & Charging Pumps.Caused by Design Criteria Misinterpretation.Procedure Mods Will Be Made | |
| 05000281/LER-1981-009-03, /03L-0:on 810105,PT-27A Revealed Loss of Heat Tracing for Panel 11 Circuit 4C.Caused by Short in Heat Tape.Defective Heat Tracing Replaced.Design Change Initiated | /03L-0:on 810105,PT-27A Revealed Loss of Heat Tracing for Panel 11 Circuit 4C.Caused by Short in Heat Tape.Defective Heat Tracing Replaced.Design Change Initiated | |
| 05000280/LER-1981-010-03, /03L-0:on 810415,alarm Setpoints for RM-CC-105 & RM-CC-106 Found Greater than Tech Spec Limits on Several Occasions.Caused by Misinterpretation of Background & Insufficient Guidelines for Evaluation of Alarm Setpoint | /03L-0:on 810415,alarm Setpoints for RM-CC-105 & RM-CC-106 Found Greater than Tech Spec Limits on Several Occasions.Caused by Misinterpretation of Background & Insufficient Guidelines for Evaluation of Alarm Setpoint | |
| 05000281/LER-1981-010-03, /03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc | /03L-0:on 810209,svc Water pump,2-SW-P-10B, Developed Low Discharge Pressure.Caused by Eel Lodged in Impeller.Eel Removed & Pump Returned to Svc | |
| 05000281/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000280/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000281/LER-1981-011-03, /03L-0:on 810119,fire Watch Not Maintained While Fuel Oil Pumphouse Carbon Dioxide Sys Out of Svc for Design Change Mods.Caused by Personnel Leaving Post.Fire Watch re-established & Personnel Disciplined | /03L-0:on 810119,fire Watch Not Maintained While Fuel Oil Pumphouse Carbon Dioxide Sys Out of Svc for Design Change Mods.Caused by Personnel Leaving Post.Fire Watch re-established & Personnel Disciplined | |
| 05000280/LER-1981-011-03, /03L-0:on 810426 & 27,process Vent Radiation Monitors Flooded Due to Introduction of Water Into Process Vent Sys.Caused by Failure of Primary Drain Tank Level Control Sys.Monitors Drained & Vacuum Pump Replaced | /03L-0:on 810426 & 27,process Vent Radiation Monitors Flooded Due to Introduction of Water Into Process Vent Sys.Caused by Failure of Primary Drain Tank Level Control Sys.Monitors Drained & Vacuum Pump Replaced | |
| 05000281/LER-1981-012-03, /03L-0:on 810118,boric Acid Transfer Pump 1-CH-P-2D Failed.Caused by Bearing Failure Due to Oil Seal Failure.Pump Repaired | /03L-0:on 810118,boric Acid Transfer Pump 1-CH-P-2D Failed.Caused by Bearing Failure Due to Oil Seal Failure.Pump Repaired | |
| 05000280/LER-1981-012-03, /03L-0:on 810506,seismic Instrumentation Found Not Calibr According to Tech Specs.Caused by Defective Procedures.Periodic Test Had Been Mislabeled as Calibr Procedure.Instrumentation Calibr Using Approved Procedure | /03L-0:on 810506,seismic Instrumentation Found Not Calibr According to Tech Specs.Caused by Defective Procedures.Periodic Test Had Been Mislabeled as Calibr Procedure.Instrumentation Calibr Using Approved Procedure | |
| 05000281/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000281/LER-1981-013-03, /03L-0:on 810119,improperly Sealed Fire Barrier Penetration Discovered.Caused by Improper Matl Being Packed Into Penetration.Penetration Properly Sealed | /03L-0:on 810119,improperly Sealed Fire Barrier Penetration Discovered.Caused by Improper Matl Being Packed Into Penetration.Penetration Properly Sealed | |
| 05000280/LER-1981-013-03, /03L-0:on 810527,radiation Monitor Recorder RR-100 Was Found Indicating Decade Lower than Corresponding Monitors.Caused by Dirty Contacts in Circuit Controlling Positioning of Printing Device.Contacts Cleaned | /03L-0:on 810527,radiation Monitor Recorder RR-100 Was Found Indicating Decade Lower than Corresponding Monitors.Caused by Dirty Contacts in Circuit Controlling Positioning of Printing Device.Contacts Cleaned | |
| 05000281/LER-1981-014-03, /03L-0:on 810212,RM-CC-106 Alarm Setpoint Found Outside Tech Spec.Caused by Personnel Error.Setpoints Reset | /03L-0:on 810212,RM-CC-106 Alarm Setpoint Found Outside Tech Spec.Caused by Personnel Error.Setpoints Reset | |
| 05000280/LER-1981-014-03, /03L-0:on 810523,auxiliary Bldg Filter Banks Were Found to Be Less Efficient than Required by Tech Spec.Caused by Formation of Void Areas Due to Settling of Charcoal in Filters.Charcoal Added | /03L-0:on 810523,auxiliary Bldg Filter Banks Were Found to Be Less Efficient than Required by Tech Spec.Caused by Formation of Void Areas Due to Settling of Charcoal in Filters.Charcoal Added | |
| 05000280/LER-1981-015, Forwards LER 81-015/03L-0,updated LER 81-035/03X-1 & Corrected LER 81-036/03L-0 | Forwards LER 81-015/03L-0,updated LER 81-035/03X-1 & Corrected LER 81-036/03L-0 | |
| 05000280/LER-1981-015-03, /03L-0:on 810603,spent Fuel Pit Overflowed Into New Fuel Handling Area & Outside to Storm Drain.Caused by Leaking Diaphragm Valve & Defeated High Level Alarm Annunciator.Valve Repaired | /03L-0:on 810603,spent Fuel Pit Overflowed Into New Fuel Handling Area & Outside to Storm Drain.Caused by Leaking Diaphragm Valve & Defeated High Level Alarm Annunciator.Valve Repaired | |
| 05000281/LER-1981-015-03, /03L-0:on 810315,PT-26.1 Revealed That Process Vent Radiation Monitor Pump Failed to Rotate.Caused by Failure of Pump Bearings.Pump Replaced | /03L-0:on 810315,PT-26.1 Revealed That Process Vent Radiation Monitor Pump Failed to Rotate.Caused by Failure of Pump Bearings.Pump Replaced | |
| 05000281/LER-1981-016-03, /03L-0:on 810119,at 100% Power,Positive Pressure Greater than 0.05 Inches Water Could Not Be Maintained in Control Room.Caused by Deteriorated Seals on Door to Control Room Complex.Defective Doors Repaired | /03L-0:on 810119,at 100% Power,Positive Pressure Greater than 0.05 Inches Water Could Not Be Maintained in Control Room.Caused by Deteriorated Seals on Door to Control Room Complex.Defective Doors Repaired | |
| 05000281/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000280/LER-1981-016-03, /03L-0:on 810615,primary Sys Chloride Concentration Exceeded Tech Specs.Apparently Caused by Personnel Working on Minor Repairs to Closure Stud Hole on Reactor Vessel Flange.All Sources of Makeup Water Checked | /03L-0:on 810615,primary Sys Chloride Concentration Exceeded Tech Specs.Apparently Caused by Personnel Working on Minor Repairs to Closure Stud Hole on Reactor Vessel Flange.All Sources of Makeup Water Checked | |
| 05000281/LER-1981-017-03, /03L-0:on 810210,intermediate Range Channel N36 High Level Trip Setpoint Found in Excess of Tech Spec.Caused by Setpoint Drift.Setpoint Adjusted | /03L-0:on 810210,intermediate Range Channel N36 High Level Trip Setpoint Found in Excess of Tech Spec.Caused by Setpoint Drift.Setpoint Adjusted | |
| 05000280/LER-1981-017-03, /03L-0:on 810702,discovered That No Fire Watch Had Been Posted for Two Unsealed Fire Barrier Penetrations in Cable Spreading Room Area.Caused by Const Personnel Error. Fire Watch Posted & Seal Installed | /03L-0:on 810702,discovered That No Fire Watch Had Been Posted for Two Unsealed Fire Barrier Penetrations in Cable Spreading Room Area.Caused by Const Personnel Error. Fire Watch Posted & Seal Installed | |
| 05000280/LER-1981-018-03, Ler 81-018/03L-0:on 810702,power Operated Relief Valves Lifted to Mitigate Overpressurization Transient.Caused by Unisolated Charging Flow Control Valve.Valve Isolated. RCS Pressure Reduced Below Setpoint | Ler 81-018/03L-0:on 810702,power Operated Relief Valves Lifted to Mitigate Overpressurization Transient.Caused by Unisolated Charging Flow Control Valve.Valve Isolated. RCS Pressure Reduced Below Setpoint | |
| 05000281/LER-1981-018-03, /03L-0:on 810318,amp Readings for Heat Tracing Panel 10,circuit 4A,were Below Acceptance Criteria Per PT-27.Caused by Excessive Heat.Defective Heat Tracing Replaced & Tested | /03L-0:on 810318,amp Readings for Heat Tracing Panel 10,circuit 4A,were Below Acceptance Criteria Per PT-27.Caused by Excessive Heat.Defective Heat Tracing Replaced & Tested | |
| 05000280/LER-1981-019-01, /01T-0:on 810707,urgent Failure Alarm for Control Rods Occurred,Indicating Rods Were Inoperrable.Caused by Blown Fuse in Power Cabinet.Fuse Replaced | /01T-0:on 810707,urgent Failure Alarm for Control Rods Occurred,Indicating Rods Were Inoperrable.Caused by Blown Fuse in Power Cabinet.Fuse Replaced | |
| 05000281/LER-1981-019-03, /03L-0:on 810218,amp Readings for Heat Tracing Panel 9,circuit 6A Were Low.Caused by Excessive Heat.Heat Tracing Replaced | /03L-0:on 810218,amp Readings for Heat Tracing Panel 9,circuit 6A Were Low.Caused by Excessive Heat.Heat Tracing Replaced | |
| 05000281/LER-1981-020-03, /03L-0:on 810223,during Full power,RM-CC-106 Alert & High Alarm Lights Energized W/O Initiating Required Automatic Action.Caused by Failed Card in Alarm Circuit.Card Replaced & Tested | /03L-0:on 810223,during Full power,RM-CC-106 Alert & High Alarm Lights Energized W/O Initiating Required Automatic Action.Caused by Failed Card in Alarm Circuit.Card Replaced & Tested | |
| 05000280/LER-1981-020-03, Ae Notified Util of Seven Masonry Block Wall Sections in Fuel Bldg Not Meeting IE Bulletin 80-11 Design Requirements.Cause Not Stated.Block Walls Will Be Replaced | Ae Notified Util of Seven Masonry Block Wall Sections in Fuel Bldg Not Meeting IE Bulletin 80-11 Design Requirements.Cause Not Stated.Block Walls Will Be Replaced | |
| 05000281/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000280/LER-1981-021-03, /03L-0:on 810704,chemical Addition Tank Found to Contain 86% of Vol Required,Following Level Transmitter Recalibr.Caused by Use of Pure Water Instead of Sodium Hydroxide Solution in Original Calibr Procedure | /03L-0:on 810704,chemical Addition Tank Found to Contain 86% of Vol Required,Following Level Transmitter Recalibr.Caused by Use of Pure Water Instead of Sodium Hydroxide Solution in Original Calibr Procedure | |
| 05000280/LER-1981-021, Forwards LER 81-021/03L-0.W/o Encl LERs 81-022/03L-0 & 81-028/03L-0 | Forwards LER 81-021/03L-0.W/o Encl LERs 81-022/03L-0 & 81-028/03L-0 | |
