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| 05000334/LER-1983-001, Forwards LER 83-001/03L-0 | Forwards LER 83-001/03L-0 | |
| 05000334/LER-1983-001-03, /03L-0:on 830102,fire Barrier Penetration from East Cable Vault Ceiling to Containment Purge Duct Room Floor Discovered Unsealed.Caused by Area Differential Pressure.Both Penetration Ends Will Be Taped | /03L-0:on 830102,fire Barrier Penetration from East Cable Vault Ceiling to Containment Purge Duct Room Floor Discovered Unsealed.Caused by Area Differential Pressure.Both Penetration Ends Will Be Taped | |
| 05000334/LER-1983-002-03, 138-kV Bus 1 Lost.Caused by Inadvertent Operation of Bus back-up Timer Relay 62-Z41. Sbfu & Sru Relays Interchanged,Sbfu Relays Modified & Physical Barrier Around Sbfu Switch Installed | 138-kV Bus 1 Lost.Caused by Inadvertent Operation of Bus back-up Timer Relay 62-Z41. Sbfu & Sru Relays Interchanged,Sbfu Relays Modified & Physical Barrier Around Sbfu Switch Installed | |
| 05000334/LER-1983-002, Forwards LER 83-002/03L-0 | Forwards LER 83-002/03L-0 | |
| 05000334/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000334/LER-1983-003-03, /03L-0:on 830110,low Voltage Condition Logged on Battery Bus 1.Caused by Open Circuit in Charge Collector Resistor Preventing Charger Control in Voltage Circuit from Properly Regulating Charger Output Voltage | /03L-0:on 830110,low Voltage Condition Logged on Battery Bus 1.Caused by Open Circuit in Charge Collector Resistor Preventing Charger Control in Voltage Circuit from Properly Regulating Charger Output Voltage | |
| 05000334/LER-1983-004, Forwards LER 83-004/03L-0 | Forwards LER 83-004/03L-0 | |
| 05000334/LER-1983-004-03, /03L-0:on 830114,circuit Breaker Ocb 83 Tripped Resulting in Loss of Standby Sys Station Svc Transformer 1B. Caused by Over Excitation Relay Due to Setpoint Drift & Increase in Transformer 1B Secondary Side Voltage | /03L-0:on 830114,circuit Breaker Ocb 83 Tripped Resulting in Loss of Standby Sys Station Svc Transformer 1B. Caused by Over Excitation Relay Due to Setpoint Drift & Increase in Transformer 1B Secondary Side Voltage | |
| 05000334/LER-1983-005-99, /99X-0:on 830212,main Steam Trip Valve TV-MS-101B Shut on Loss of Air Causing Momentary Drop in Steam Line Pressure Initiating Safety Injection/Reactor Trip.Caused by Separated Sweated Fitting.Fitting Repaired | /99X-0:on 830212,main Steam Trip Valve TV-MS-101B Shut on Loss of Air Causing Momentary Drop in Steam Line Pressure Initiating Safety Injection/Reactor Trip.Caused by Separated Sweated Fitting.Fitting Repaired | |
| 05000334/LER-1983-005, Forwards LER 83-005/99X-0 | Forwards LER 83-005/99X-0 | |
| 05000334/LER-1983-006-03, /03L-0:on 830212,trip Valve (TV-MS-101B) Failed to Close During Stroke Test.Caused by Combination of Debris That Caused Slight Cylinder Scoring & Loose Pivot Arm.Piston Dressed Up & Cylinder Wall Honed | /03L-0:on 830212,trip Valve (TV-MS-101B) Failed to Close During Stroke Test.Caused by Combination of Debris That Caused Slight Cylinder Scoring & Loose Pivot Arm.Piston Dressed Up & Cylinder Wall Honed | |
| 05000334/LER-1983-006, Forwards LER 83-006/03L-0 | Forwards LER 83-006/03L-0 | |
| 05000334/LER-1983-007-04, /04T-0:on 830214,tritium Activity in Fourth Quarter 1982 Composite of Weekly Grab Samples Collected in Oh River Downstream of Effluent Found to Be Above ETS Limits.Amend to ETS Submitted to Increase Acceptable Limit | /04T-0:on 830214,tritium Activity in Fourth Quarter 1982 Composite of Weekly Grab Samples Collected in Oh River Downstream of Effluent Found to Be Above ETS Limits.Amend to ETS Submitted to Increase Acceptable Limit | |
| 05000334/LER-1983-007, Forwards LER 83-007/04T-0 | Forwards LER 83-007/04T-0 | |
| 05000334/LER-1983-008-03, During Testing of Turbine Driven Auxiliary Feedwater Pump,Excessive Pump Overheating at Inboard Packing Follower Observed.Caused by Packing Failure (Outer Two Rings Found Dry).Pump Repacked | During Testing of Turbine Driven Auxiliary Feedwater Pump,Excessive Pump Overheating at Inboard Packing Follower Observed.Caused by Packing Failure (Outer Two Rings Found Dry).Pump Repacked | |
| 05000334/LER-1983-008, Forwards Updated LER 83-008/03X-1 | Forwards Updated LER 83-008/03X-1 | |
| 05000334/LER-1983-009, Forwards LER 83-009/03L-0 | Forwards LER 83-009/03L-0 | |
| 05000334/LER-1983-009-03, /03L-0:on 830311,containment Vacuum Pump CV-P-1B Flow Rate Found Less than Tech Spec Min & Declared Inoperable.Caused by Sticking of Sliding Carbon Vanes Due to Corrosion Products in Rotor Slots.Pump Replaced | /03L-0:on 830311,containment Vacuum Pump CV-P-1B Flow Rate Found Less than Tech Spec Min & Declared Inoperable.Caused by Sticking of Sliding Carbon Vanes Due to Corrosion Products in Rotor Slots.Pump Replaced | |
| 05000334/LER-1983-010-99, /99X-0:on 830327,while Performing Weekly Diesel Engine Driven Fire Pump Operation Test,Water Level in Cooling Sys Expansion Tank Observed Low.Water Added & High Temp Caused Overflow.Caused by Defective Cylinder Head | /99X-0:on 830327,while Performing Weekly Diesel Engine Driven Fire Pump Operation Test,Water Level in Cooling Sys Expansion Tank Observed Low.Water Added & High Temp Caused Overflow.Caused by Defective Cylinder Head | |
| 05000334/LER-1983-010, Forwards LER 83-010/99X-0 | Forwards LER 83-010/99X-0 | |
| 05000334/LER-1983-011, Forwards LER 83-011/03L-0 | Forwards LER 83-011/03L-0 | |
| 05000334/LER-1983-011-03, /03L-0:on 830409,motor Thermal Overload Relay for Containment Sump to 1A Low Head Safety Injection Pump Suction Valve (MOV-SI-860A) Tripped,Disabling Motor.Cause Unknown.Event Will Be Reevaluated | /03L-0:on 830409,motor Thermal Overload Relay for Containment Sump to 1A Low Head Safety Injection Pump Suction Valve (MOV-SI-860A) Tripped,Disabling Motor.Cause Unknown.Event Will Be Reevaluated | |
| 05000334/LER-1983-012-03, /03L-0:on 830509,15 & 16 Core Cooling Monitor Failed,Rendering Data Retrieval Impossible.Caused by Broken Card Cage & Defective Card in Spare Core Cooling Monitor Unit.Card Cage Repaired | /03L-0:on 830509,15 & 16 Core Cooling Monitor Failed,Rendering Data Retrieval Impossible.Caused by Broken Card Cage & Defective Card in Spare Core Cooling Monitor Unit.Card Cage Repaired | |
| 05000334/LER-1983-013-03, /03L-0:on 830505,during Normal Operation,Chlorine Detector B Wick Observed Dry While Electrolyte Reservoir Indicated Full.Caused by Binding Level Indicator. Indicator Freed | /03L-0:on 830505,during Normal Operation,Chlorine Detector B Wick Observed Dry While Electrolyte Reservoir Indicated Full.Caused by Binding Level Indicator. Indicator Freed | |
| 05000334/LER-1983-014-03, Monthly Valve Stroke Tests of Refueling Water Storage Tank to Low Head Safety Injection Pump Suction Valves Not Conducted.Caused by Deficiency in Surveillance Program | Monthly Valve Stroke Tests of Refueling Water Storage Tank to Low Head Safety Injection Pump Suction Valves Not Conducted.Caused by Deficiency in Surveillance Program | |
| 05000334/LER-1983-015-03, /03L-0:on 830524,during Normal Power Operation, Relay 5I-VD106X Experienced Spurious Actuation,Causing Inadvertent Isolation of Emergency Bus 1DF from Normal Supply.Caused by Personnel Error | /03L-0:on 830524,during Normal Power Operation, Relay 5I-VD106X Experienced Spurious Actuation,Causing Inadvertent Isolation of Emergency Bus 1DF from Normal Supply.Caused by Personnel Error | |
| 05000334/LER-1983-016-03, /03L-0:on 830528,supply Breakers to 4,160-volt Buses 1A & 1B Opened Due to Inadvertent Operation of Pilot Wire Protection Relay,Causing Loss of Offsite Ac Source & Reactor Trip.Caused by Ground Fault on Panel | /03L-0:on 830528,supply Breakers to 4,160-volt Buses 1A & 1B Opened Due to Inadvertent Operation of Pilot Wire Protection Relay,Causing Loss of Offsite Ac Source & Reactor Trip.Caused by Ground Fault on Panel | |
| 05000334/LER-1983-017-03, /03L-0:on 830528,following Reactor Trip,One Source Range Nuclear Detector Observed Not Indicating & Other Source Range Began Spiking High.Both Declared Inoperable. Cause Not Determined.Both Detectors Replaced | /03L-0:on 830528,following Reactor Trip,One Source Range Nuclear Detector Observed Not Indicating & Other Source Range Began Spiking High.Both Declared Inoperable. Cause Not Determined.Both Detectors Replaced | |
| 05000334/LER-1983-018-03, /03L-0:on 830527,OST 1.16.5 (Monthly Fuel Bldg Ventilation Sys Verification) Not Performed Since 830308. Caused by Failing to Schedule Test in Apr & May.Ost Performed Satisfactorily | /03L-0:on 830527,OST 1.16.5 (Monthly Fuel Bldg Ventilation Sys Verification) Not Performed Since 830308. Caused by Failing to Schedule Test in Apr & May.Ost Performed Satisfactorily | |
| 05000334/LER-1983-019-03, /03L-0:on 830611,while in Hot Standby,Lift Settings on 10 of 15 Main Steam Safety Valves Mfg by Dresser Found Outside Tech Spec Limits.Caused by Valve Lift Setpoint Drift.Settings Readjusted within Tolerance | /03L-0:on 830611,while in Hot Standby,Lift Settings on 10 of 15 Main Steam Safety Valves Mfg by Dresser Found Outside Tech Spec Limits.Caused by Valve Lift Setpoint Drift.Settings Readjusted within Tolerance | |
| 05000334/LER-1983-020-03, /03L-0:on 830629,wire on Terminal Block for Emergency Bus Supply Breaker 1D10 Lifted Prematurely Prior to Establishing Electrical Clearance,Causing Breaker to Trip.Const Procedures Modified | /03L-0:on 830629,wire on Terminal Block for Emergency Bus Supply Breaker 1D10 Lifted Prematurely Prior to Establishing Electrical Clearance,Causing Breaker to Trip.Const Procedures Modified | |
| 05000334/LER-1983-021, Requests That LER 83-021/03L-0 Be Withdrawn Based on Investigation Which Revealed That Surveillance Test Complies W/Requisite Actions for Limiting Condition for Tech Spec 3.9.9 Re Core Reload | Requests That LER 83-021/03L-0 Be Withdrawn Based on Investigation Which Revealed That Surveillance Test Complies W/Requisite Actions for Limiting Condition for Tech Spec 3.9.9 Re Core Reload | |
| 05000334/LER-1983-021-03, /03L-0:on 830820,containment Ventilation Test Not Performed within Surveillance Frequency Specified in Tech Specs.Caused by Differing Assumptions Re Test.Operations Assumed Responsibility for Test Scheduling | /03L-0:on 830820,containment Ventilation Test Not Performed within Surveillance Frequency Specified in Tech Specs.Caused by Differing Assumptions Re Test.Operations Assumed Responsibility for Test Scheduling | |
| 05000334/LER-1983-022-03, /03L-0:on 830907,flow Rate of 36,056 Cfm Measured Through Train B Filter Bank.Caused by Plugged Prefilter. Prefilter Replaced | /03L-0:on 830907,flow Rate of 36,056 Cfm Measured Through Train B Filter Bank.Caused by Plugged Prefilter. Prefilter Replaced | |
| 05000334/LER-1983-023-03, /03L-0:on 830910,during Performance of Bvt 1.1-1.47.4 & 1.3-1.47.5 Discovered Valves & Flanges W/ Unacceptable Leakage.Caused by Inability to Hold Applied Pressure.Valves/Flanges Replaced | /03L-0:on 830910,during Performance of Bvt 1.1-1.47.4 & 1.3-1.47.5 Discovered Valves & Flanges W/ Unacceptable Leakage.Caused by Inability to Hold Applied Pressure.Valves/Flanges Replaced | |
| 05000334/LER-1983-024-03, /03L-0:on 830918,during Core Subcooling Monitor Surveillance Test to Check Channel Behavior,Monitor Found to Be Reading Erroneously.Caused by Loose Connector within Unit.Connector Repaired | /03L-0:on 830918,during Core Subcooling Monitor Surveillance Test to Check Channel Behavior,Monitor Found to Be Reading Erroneously.Caused by Loose Connector within Unit.Connector Repaired | |
| 05000334/LER-1983-025-03, /03L-0:on 831009 & 10,nuclear Instrumentation Power Range Channel N41 Failed Downscale.Caused by Failed Connector in High Voltage Power Supply Cable.Cable Replaced | /03L-0:on 831009 & 10,nuclear Instrumentation Power Range Channel N41 Failed Downscale.Caused by Failed Connector in High Voltage Power Supply Cable.Cable Replaced | |
| 05000334/LER-1983-026-03, /03L-0:on 830919,while Filling Safety Injection Accumulator 1A,accumulator Low Level Alarms & Containment Sump Alarm Received in Control Room.Reducer Did Not Provide Proper Drawback.Reducer Repaired | /03L-0:on 830919,while Filling Safety Injection Accumulator 1A,accumulator Low Level Alarms & Containment Sump Alarm Received in Control Room.Reducer Did Not Provide Proper Drawback.Reducer Repaired | |
| 05000334/LER-1983-027-03, /03L-0:on 830925,operator Attempting to Raise Voltage on Sys Station Svc Transformer 1A W/Installed Tap Charger Used Incorrect Voltmeter,Causing Overexcitation of Transformer.Caused by Operator Error | /03L-0:on 830925,operator Attempting to Raise Voltage on Sys Station Svc Transformer 1A W/Installed Tap Charger Used Incorrect Voltmeter,Causing Overexcitation of Transformer.Caused by Operator Error | |
| 05000334/LER-1983-028-03, /03L-0:on 830926,charging Isolation Valve MOV-CH-310 Would Not Reopen After Being Stroked Shut. Caused by Dislodged Contactor Drive Pin Resulting in Misalignment.Pin Realigned | /03L-0:on 830926,charging Isolation Valve MOV-CH-310 Would Not Reopen After Being Stroked Shut. Caused by Dislodged Contactor Drive Pin Resulting in Misalignment.Pin Realigned | |
| 05000334/LER-1983-029-03, /03L-0:on 830918,discovered Main Steam Pressure Transmitter PT-MS-484 Reading Zero While Two Redundant Channels Indicated 400 Psig.Caused by Oscillator/Amplifier Out of Calibr.Instrument Recalibr | /03L-0:on 830918,discovered Main Steam Pressure Transmitter PT-MS-484 Reading Zero While Two Redundant Channels Indicated 400 Psig.Caused by Oscillator/Amplifier Out of Calibr.Instrument Recalibr | |
| 05000334/LER-1983-030-03, /03L-0:on 831003,charging Header Isolation Valve MOV-CH-289 Failed to Reopen After Being Stroked Closed for Dst 1.11.10.Caused by Binding of Mechanical Interlock on Valve Line Starter.Coil Replaced | /03L-0:on 831003,charging Header Isolation Valve MOV-CH-289 Failed to Reopen After Being Stroked Closed for Dst 1.11.10.Caused by Binding of Mechanical Interlock on Valve Line Starter.Coil Replaced | |
| 05000334/LER-1983-031-03, /03L-0:on 831006,low Alarm Received on Acoustic Monitor FZ-RC-100B for Pressurizer Relief Valve.Channel Reset But Alarm Continued.Caused by pre-amp Bias Adjust Potentiometer Adjustment Drift.Unit Adjusted | /03L-0:on 831006,low Alarm Received on Acoustic Monitor FZ-RC-100B for Pressurizer Relief Valve.Channel Reset But Alarm Continued.Caused by pre-amp Bias Adjust Potentiometer Adjustment Drift.Unit Adjusted | |
| 05000334/LER-1983-032-03, /03L-0:on 831003,safety Injection Accumulator SI-TK-1B Boron Concentration Found Above Tech Spec Limit. Caused by Tank Samples Showing Higher Concentration. Personnel Will Hold Meeting to Review Incident | /03L-0:on 831003,safety Injection Accumulator SI-TK-1B Boron Concentration Found Above Tech Spec Limit. Caused by Tank Samples Showing Higher Concentration. Personnel Will Hold Meeting to Review Incident | |
| 05000334/LER-1983-033-03, /03L-0:on 830922,two of Three River Water Pumps Left in pull-to-lock Position.Caused by Operator Failure to Return River Water Sys to Pretest Condition.Corrective Actions Complete or in Progress | /03L-0:on 830922,two of Three River Water Pumps Left in pull-to-lock Position.Caused by Operator Failure to Return River Water Sys to Pretest Condition.Corrective Actions Complete or in Progress | |
| 05000334/LER-1983-034-03, /03L-0:on 831026,480-volt GE Breaker for Quench Spray Pump 1B Could Not Be Exercised.Manual Handle for Breaker Disengaged from Closing Device.Caused by Excessive Force Used on Breaker | /03L-0:on 831026,480-volt GE Breaker for Quench Spray Pump 1B Could Not Be Exercised.Manual Handle for Breaker Disengaged from Closing Device.Caused by Excessive Force Used on Breaker | |
| 05000334/LER-1983-035-03, /03L-0:on 831027,low Voltage Alarm Received on Dc Bus 1,resulting in Failed Battery Charger 1.Caused by Blown Output Fuse.Fuse Replaced | /03L-0:on 831027,low Voltage Alarm Received on Dc Bus 1,resulting in Failed Battery Charger 1.Caused by Blown Output Fuse.Fuse Replaced | |
| 05000334/LER-1983-036-03, /03L-0:on 831104,reactor Coolant Pump Thermal Barrier CCR Isolation Valves TV-CC-107A,B & C Not Stroked as Outlined in Inservice Insp Program.After 1980 Inservice Insp Rev,Valves Inadvertently Omitted | /03L-0:on 831104,reactor Coolant Pump Thermal Barrier CCR Isolation Valves TV-CC-107A,B & C Not Stroked as Outlined in Inservice Insp Program.After 1980 Inservice Insp Rev,Valves Inadvertently Omitted | |
| 05000334/LER-1983-037-03, /03L-0:on 831110,undervoltage Relay 27-RP2100 Found Out of Tolerance.Caused by Failed Potentiometer in Relay.Relay Replaced & Channel Returned to Svc on 831116 | /03L-0:on 831110,undervoltage Relay 27-RP2100 Found Out of Tolerance.Caused by Failed Potentiometer in Relay.Relay Replaced & Channel Returned to Svc on 831116 | |
| 05000334/LER-1983-038-03, /03L-0:on 831125,during Maint Surveillance Procedure 2.04,rate Trip Time Constant Found Below Tech Spec Min.Caused by Instrument Drift.Time Constant Adjusted to 2.2 | /03L-0:on 831125,during Maint Surveillance Procedure 2.04,rate Trip Time Constant Found Below Tech Spec Min.Caused by Instrument Drift.Time Constant Adjusted to 2.2 | |