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| 05000316/LER-1984-001, :on 840117,boron Injection Tank Diluted by Primary Water After Equipment Clearance Permit Released & Sys Realigned.Caused by Open Untagged Valve.Individual Responsible for Restoration Forms Notified |
- on 840117,boron Injection Tank Diluted by Primary Water After Equipment Clearance Permit Released & Sys Realigned.Caused by Open Untagged Valve.Individual Responsible for Restoration Forms Notified
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| 05000315/LER-1984-001-01, :on 840123,channel 1 (NFP-220) Control Room Flow Indication Dropped to Approx 90% Followed by Automatic Reactor Trip.Caused by Leaking Equalizing Valve.Equipment Tasks Reseached |
- on 840123,channel 1 (NFP-220) Control Room Flow Indication Dropped to Approx 90% Followed by Automatic Reactor Trip.Caused by Leaking Equalizing Valve.Equipment Tasks Reseached
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000315/LER-1984-002-01, :on 840401,ECCS Surveillance Procedure Error Discovered.Contributing Factor Was Mod to Quarterly Steps W/O Consideration of Abnormal Sys Conditions Caused by Monthly Steps of Procedure.Procedure Revised |
- on 840401,ECCS Surveillance Procedure Error Discovered.Contributing Factor Was Mod to Quarterly Steps W/O Consideration of Abnormal Sys Conditions Caused by Monthly Steps of Procedure.Procedure Revised
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| 05000316/LER-1984-002, :on 840218,turbine/reactor Trip Occurred from Full Power While Placing Moisture Separator Reheater Steam Coils in Svc.Caused by Operator Failing to Close Main Steam Supply Valves.Procedure Modified |
- on 840218,turbine/reactor Trip Occurred from Full Power While Placing Moisture Separator Reheater Steam Coils in Svc.Caused by Operator Failing to Close Main Steam Supply Valves.Procedure Modified
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| 05000316/LER-1984-003-01, Updated LER 84-003-01:on 840311 & 17,upper Containment Area Radiation Monitor VRS-2201(IL) Received High Alarm.Caused by Equipment Malfunction Due to Software Problems.New Software Installed | Updated LER 84-003-01:on 840311 & 17,upper Containment Area Radiation Monitor VRS-2201(IL) Received High Alarm.Caused by Equipment Malfunction Due to Software Problems.New Software Installed | |
| 05000316/LER-1984-003, :on 840311,upper Containment Area Radiation Monitor Received High Alarm,Resulting in Automatic Actuation of ESF Containment Isolation Sys.Caused by Equipment Malfunctions Possibly Due to Software Problems |
- on 840311,upper Containment Area Radiation Monitor Received High Alarm,Resulting in Automatic Actuation of ESF Containment Isolation Sys.Caused by Equipment Malfunctions Possibly Due to Software Problems
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| 05000315/LER-1984-003-05, :on 840407,Fire Door 227 Inoperable Due to Electrical Cords Placed Through Penetration,Obstructing Closure.Fire Watch Established.Maint Personnel Reinstructed Re Rules Governing fire-related Tech Specs |
- on 840407,Fire Door 227 Inoperable Due to Electrical Cords Placed Through Penetration,Obstructing Closure.Fire Watch Established.Maint Personnel Reinstructed Re Rules Governing fire-related Tech Specs
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| 05000315/LER-1984-004-01, :on 840409,during Surveillance Testing of Turbine Driven Auxiliary Feed Pump Using Revised Procedure, Throttle Trip Valve Failed to Trip Turbine.Caused by Excessive Steam Leakoff.Leakoff Line Capped |
- on 840409,during Surveillance Testing of Turbine Driven Auxiliary Feed Pump Using Revised Procedure, Throttle Trip Valve Failed to Trip Turbine.Caused by Excessive Steam Leakoff.Leakoff Line Capped
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| 05000315/LER-1984-005-01, :on 840504,sample Flow Pressure Reducing Valve to Waste Gas Sys Auto Gas Analyzer Discovered Inoperable.One Gas Compressor Remained Running in Violation of Tech Specs. Caused by Lack of Communication Between Shifts |
- on 840504,sample Flow Pressure Reducing Valve to Waste Gas Sys Auto Gas Analyzer Discovered Inoperable.One Gas Compressor Remained Running in Violation of Tech Specs. Caused by Lack of Communication Between Shifts
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| 05000315/LER-1984-006-01, :on 840510,personnel Discovered Fire Door 230 Inoperable W/O Fire Watch.Caused by Air Hose Passing Through Doorway Preventing Full Closure.Administrative Measures Instituted |
- on 840510,personnel Discovered Fire Door 230 Inoperable W/O Fire Watch.Caused by Air Hose Passing Through Doorway Preventing Full Closure.Administrative Measures Instituted
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| 05000316/LER-1984-007, :on 840411,12,16 & 20,high Alarm & Subsequent Trip of Containment Purge Received from Lower Containment low-range Noble Gas Radiation Monitor ERS-2405.Alternate Methodology for Calculating Under Way |
- on 840411,12,16 & 20,high Alarm & Subsequent Trip of Containment Purge Received from Lower Containment low-range Noble Gas Radiation Monitor ERS-2405.Alternate Methodology for Calculating Under Way
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000315/LER-1984-007, :on 840528,error Discovered in Detector Code Used for Analysis of First 47 Cycle 8 Flux Maps.Caused by Input Error.Code Corrected & line-by-line Review of Coding Changes Made.Requests Extension for Completion |
- on 840528,error Discovered in Detector Code Used for Analysis of First 47 Cycle 8 Flux Maps.Caused by Input Error.Code Corrected & line-by-line Review of Coding Changes Made.Requests Extension for Completion
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| 05000315/LER-1984-007-01, :on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding |
- on 840522,detector Code Programming Error Discovered in Calculational Logic While Modifying Code. Procedure Change Made to Require Independent Line by Line Review of Coding
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| 05000315/LER-1984-008-01, :on 840617,reactor Trip & Safety Injection Occurred from Loss of Control Room Instrument Distribution Invertor Iv.Caused by Shorted C-2 Capacitor on Shorting Circuit Board.Design Change Installed |
- on 840617,reactor Trip & Safety Injection Occurred from Loss of Control Room Instrument Distribution Invertor Iv.Caused by Shorted C-2 Capacitor on Shorting Circuit Board.Design Change Installed
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| 05000315/LER-1984-009-01, :on 840321,flux Map Indicated That Tech Spec Surveillance Requirement 4.2.2.2.C Exceeded.Caused by self-imposed Conservatisms Resulting in Discrete Drop in Allowable Power Level W/Bank D Inserted |
- on 840321,flux Map Indicated That Tech Spec Surveillance Requirement 4.2.2.2.C Exceeded.Caused by self-imposed Conservatisms Resulting in Discrete Drop in Allowable Power Level W/Bank D Inserted
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| 05000316/LER-1984-009, :on 840410,Cardox Fire Protection Sys on Reactor Cable Tunnel Discovered Isolated W/No Firewatch. Caused by Firewatch & Security Officer Error in Not Checking Appropriate Switch in Normal Position |
- on 840410,Cardox Fire Protection Sys on Reactor Cable Tunnel Discovered Isolated W/No Firewatch. Caused by Firewatch & Security Officer Error in Not Checking Appropriate Switch in Normal Position
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| 05000316/LER-1984-010, :on 840429 & 0501,automatic Actuation Occurred on Containment Ventilation Isolation Sys Train a When Air Particulate Radiation Monitoring Channel VRS-2301 Exceeded High Alarm Setpoint.Caused by Low Setpoint |
- on 840429 & 0501,automatic Actuation Occurred on Containment Ventilation Isolation Sys Train a When Air Particulate Radiation Monitoring Channel VRS-2301 Exceeded High Alarm Setpoint.Caused by Low Setpoint
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| 05000315/LER-1984-010-01, :on 840617,reactor Trip & Safety Injection Occurred from Loss of Control Room Instrument Distribution Inverter Iv.Caused by Shorted C-2 Capacitor.Capacitor Replaced W/Higher Temp Rated Capacitors |
- on 840617,reactor Trip & Safety Injection Occurred from Loss of Control Room Instrument Distribution Inverter Iv.Caused by Shorted C-2 Capacitor.Capacitor Replaced W/Higher Temp Rated Capacitors
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| 05000316/LER-1984-011, :on 840504,w/RCS in Mode 6,lower Containment Airborne Low Range Noble Gas Monitor Received Spurious High Alarm Causing Train a to Trip.Caused by Software Error. Manufacturer Notified.Resolution Under Evaluation |
- on 840504,w/RCS in Mode 6,lower Containment Airborne Low Range Noble Gas Monitor Received Spurious High Alarm Causing Train a to Trip.Caused by Software Error. Manufacturer Notified.Resolution Under Evaluation
| 10 CFR 50.73(a)(2)(iv), System Actuation |
| 05000315/LER-1984-011-01, :on 840621,both Trains of ESF Ventilation Sys Inadvertantly Made Inoperable During Testing.Caused by Control Switch for Fan Placed in Stop Instead of Auto.Test Procedure Changed |
- on 840621,both Trains of ESF Ventilation Sys Inadvertantly Made Inoperable During Testing.Caused by Control Switch for Fan Placed in Stop Instead of Auto.Test Procedure Changed
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| 05000316/LER-1984-012, :on 840508,inadvertent Safety Injection Occurred During Load Shedding Surveillance Test on Train B Diesel Generator.Caused by Personnel Error & Procedural Deficiency.Load Shedding Procedure Modified |
- on 840508,inadvertent Safety Injection Occurred During Load Shedding Surveillance Test on Train B Diesel Generator.Caused by Personnel Error & Procedural Deficiency.Load Shedding Procedure Modified
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| 05000315/LER-1984-012-01, :on 840623,automatic Actuation of Train a Containment Ventilation Isolation Sys Occured.Caused by Containment Air Particulate Radiation Monitoring Channel Exceeding High Alarm Setpoint |
- on 840623,automatic Actuation of Train a Containment Ventilation Isolation Sys Occured.Caused by Containment Air Particulate Radiation Monitoring Channel Exceeding High Alarm Setpoint
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| 05000316/LER-1984-013, :on 840516,scheduled 60-month Capacity Discharge Test Performed on Battery AB Indicated 71% Capacity,Not Meeting 80% Tech Spec Requirement.Battery Replaced & Undergoing Performance Testing |
- on 840516,scheduled 60-month Capacity Discharge Test Performed on Battery AB Indicated 71% Capacity,Not Meeting 80% Tech Spec Requirement.Battery Replaced & Undergoing Performance Testing
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| 05000315/LER-1984-013-01, :on 840706,discovered That Fire Watch Not Maintained in Area Fire Retardant Matls Removed from Previously Protected Conduit Containing safety-related Cables.Fire Watch Patrol Initiated |
- on 840706,discovered That Fire Watch Not Maintained in Area Fire Retardant Matls Removed from Previously Protected Conduit Containing safety-related Cables.Fire Watch Patrol Initiated
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| 05000316/LER-1984-014, :on 840521,w/unit in Cold Shutdown,Loss of RHR Pumps Occurred.Caused by Cavitation & Air Binding of Pumps. Procedure Changed to Include Instructions to Stop Operating Pump Prior to Starting Second Pump |
- on 840521,w/unit in Cold Shutdown,Loss of RHR Pumps Occurred.Caused by Cavitation & Air Binding of Pumps. Procedure Changed to Include Instructions to Stop Operating Pump Prior to Starting Second Pump
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| 05000315/LER-1984-014-01, :on 840716,nonlicensed Operator Mistakenly Isolated North Low Head Safety Injection Pump.Caused by Personnel Error.Procedure Revised |
- on 840716,nonlicensed Operator Mistakenly Isolated North Low Head Safety Injection Pump.Caused by Personnel Error.Procedure Revised
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| 05000316/LER-1984-015, :on 840602,w/RCS in Mode 5,shutdown Margin Determination Surveillance Grace Period Exceeded.Caused by Personnel Error.Personnel Reinstructed.Sample Frequency Increased |
- on 840602,w/RCS in Mode 5,shutdown Margin Determination Surveillance Grace Period Exceeded.Caused by Personnel Error.Personnel Reinstructed.Sample Frequency Increased
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| 05000315/LER-1984-015-01, :on 840728 & 29,Tech Spec 3.3.3.1,Action Statement 19 Violated Due to Failure to Complete Daily Survey of Spent Fuel Storage Area.Caused by Personnel Error. Written Instructions Improved |
- on 840728 & 29,Tech Spec 3.3.3.1,Action Statement 19 Violated Due to Failure to Complete Daily Survey of Spent Fuel Storage Area.Caused by Personnel Error. Written Instructions Improved
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| 05000316/LER-1984-016, :on 840603,fire Seals 7091 & 7500 Discovered Inoperable W/O Firewatch Present.Apparent Cause Was Slight Movement of Fire Pipe During Installation.Continuous Firewatch Maintained & Seals Repaired |
- on 840603,fire Seals 7091 & 7500 Discovered Inoperable W/O Firewatch Present.Apparent Cause Was Slight Movement of Fire Pipe During Installation.Continuous Firewatch Maintained & Seals Repaired
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| 05000315/LER-1984-016, :on 840808,control Switch Positions for Motor Driven Auxiliary Feedwater Pumps Not in Neutral.Caused by Administrative Oversight.Tech Spec Table 3.3-3 Revised |
- on 840808,control Switch Positions for Motor Driven Auxiliary Feedwater Pumps Not in Neutral.Caused by Administrative Oversight.Tech Spec Table 3.3-3 Revised
| 10 CFR 50.73(a)(2)(i) |
| 05000315/LER-1984-016-01, :on 840808,auxiliary Feedwater Pumps Stopped & Control Switches Placed in Neutral to Prevent Restarting Due to Main Feedpump Trip.Caused by Inaccurate Procedures. Operators Instructed to Leave Switches in Mode 3 |
- on 840808,auxiliary Feedwater Pumps Stopped & Control Switches Placed in Neutral to Prevent Restarting Due to Main Feedpump Trip.Caused by Inaccurate Procedures. Operators Instructed to Leave Switches in Mode 3
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| 05000316/LER-1984-017, :on 840704,while in Mode 3,surveillance Requirements of Tech Spec 3.3.1.1 Not Performed as Required for intermediate-range ex-core Detectors Shiftly Channel Checks.Procedures Revised |
- on 840704,while in Mode 3,surveillance Requirements of Tech Spec 3.3.1.1 Not Performed as Required for intermediate-range ex-core Detectors Shiftly Channel Checks.Procedures Revised
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| 05000315/LER-1984-017-01, :on 840810,high Level in Steam Generator 4 Caused Operating Main Feedpump Trip,Resulting in Automatic Actuation of Motor Driven Auxiliary Feedpumps & Feedwater Isolation.Caused by Personnel Error.Personnel Counseled |
- on 840810,high Level in Steam Generator 4 Caused Operating Main Feedpump Trip,Resulting in Automatic Actuation of Motor Driven Auxiliary Feedpumps & Feedwater Isolation.Caused by Personnel Error.Personnel Counseled
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| 05000316/LER-1984-018, :on 840709,following Refueling Outage,Rpi for Rods B-8 & K-10 Misaligned.Caused by Variables Affecting Secondary Coil Stack Voltages.Unit Placed in Mode 3 |
- on 840709,following Refueling Outage,Rpi for Rods B-8 & K-10 Misaligned.Caused by Variables Affecting Secondary Coil Stack Voltages.Unit Placed in Mode 3
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| 05000315/LER-1984-018-01, :on 840814,CRID IV Inverter Abnormal Alarm Activated Due to Crid Failure,Resulting in Reactor Trip & Safety Injection.Caused by Leaking Water from Emergency Shower & Eyewash Station.Design Change Planned |
- on 840814,CRID IV Inverter Abnormal Alarm Activated Due to Crid Failure,Resulting in Reactor Trip & Safety Injection.Caused by Leaking Water from Emergency Shower & Eyewash Station.Design Change Planned
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| 05000315/LER-1984-019-01, :on 840818,ability of Turbine Driven Auxiliary Feed Pumps to Meet Safety Function Questioned During NRC Audit.Caused by Governor Setting at 50%.Unit 1 Settings Changed to 85% & Unit 2 to 90% |
- on 840818,ability of Turbine Driven Auxiliary Feed Pumps to Meet Safety Function Questioned During NRC Audit.Caused by Governor Setting at 50%.Unit 1 Settings Changed to 85% & Unit 2 to 90%
| 10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition |
| 05000316/LER-1984-019, :on 840710,one of Four Operating Reactor Coolant Pumps Removed from Svc Due to Pump Problems.Caused by Personnel Failure to Place Reactor Coolant Loop in Trip Position as Required by Tech Specs.Procedure Revised |
- on 840710,one of Four Operating Reactor Coolant Pumps Removed from Svc Due to Pump Problems.Caused by Personnel Failure to Place Reactor Coolant Loop in Trip Position as Required by Tech Specs.Procedure Revised
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| 05000316/LER-1984-020, :on 840805,reactor Tripped Due to Loss of 120-volt Ac Vital Bus Inverter & Steam Generators 1 & 2 Flow Control Valves FMO-212 & 222 Did Not Operate Properly on Flow Retention Signal |
- on 840805,reactor Tripped Due to Loss of 120-volt Ac Vital Bus Inverter & Steam Generators 1 & 2 Flow Control Valves FMO-212 & 222 Did Not Operate Properly on Flow Retention Signal
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| 05000315/LER-1984-020-01, :on 840822,control Room Cable Vault Supply Fan Damper Found Inoperable.Caused by Short Section of Conduit Prohibiting Damper from Functioning.Obstruction Removed & Operability Verified |
- on 840822,control Room Cable Vault Supply Fan Damper Found Inoperable.Caused by Short Section of Conduit Prohibiting Damper from Functioning.Obstruction Removed & Operability Verified
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| 05000315/LER-1984-020, :on 840822,control Room Cable Vault Supply Fan Damper Found Blocked Open W/Obstructed Conduit.Caused by Personnel Using Conduit to Hold Dampers Open.Administrative Policy Changes Established |
- on 840822,control Room Cable Vault Supply Fan Damper Found Blocked Open W/Obstructed Conduit.Caused by Personnel Using Conduit to Hold Dampers Open.Administrative Policy Changes Established
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| 05000315/LER-1984-021-01, :on 840829,discovered Calibr Constants for Eberline Radiation Monitoring Sys Calculated Incorrectly for Secondary Source.Caused by Error in Procedure.Procedure Changed & Calibr Constants Corrected |
- on 840829,discovered Calibr Constants for Eberline Radiation Monitoring Sys Calculated Incorrectly for Secondary Source.Caused by Error in Procedure.Procedure Changed & Calibr Constants Corrected
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| 05000316/LER-1984-021, :on 840807,discovered That Asterisks Allowing Operation of Upper Containment Grab Sample Valves Sm-8 & 10 Absent from Tech Specs.Caused by Inadequate Verification of Tech Specs.Change Requested |
- on 840807,discovered That Asterisks Allowing Operation of Upper Containment Grab Sample Valves Sm-8 & 10 Absent from Tech Specs.Caused by Inadequate Verification of Tech Specs.Change Requested
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| 05000315/LER-1984-021, :on 840829,calibr Constants Used by Eberline Radiation Monitoring Sys to Convert Channel Response in Counts Per Minute Into Units Calculated Incorrectly.Caused by Procedural Error |
- on 840829,calibr Constants Used by Eberline Radiation Monitoring Sys to Convert Channel Response in Counts Per Minute Into Units Calculated Incorrectly.Caused by Procedural Error
| 10 CFR 50.73(a)(2) |
| 05000315/LER-1984-022-01, :on 840912,during Review of Setpoint Adjustment Formula,Incorrect Dose Rate Factors Discovered Calculated Using Setpoint 3 Computer Program.Caused by Erroneous Gaseous Waste Release Dose Rates Calculation |
- on 840912,during Review of Setpoint Adjustment Formula,Incorrect Dose Rate Factors Discovered Calculated Using Setpoint 3 Computer Program.Caused by Erroneous Gaseous Waste Release Dose Rates Calculation
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| 05000316/LER-1984-022, :on 840405,Cardox Fire Protection Sys on Cable Tunnel Discovered Isolated W/No Firewatch Present,Contrary to Tech Specs.Caused by Personnel Error.Administrative Changes Made to Avoid Future Errors |
- on 840405,Cardox Fire Protection Sys on Cable Tunnel Discovered Isolated W/No Firewatch Present,Contrary to Tech Specs.Caused by Personnel Error.Administrative Changes Made to Avoid Future Errors
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| 05000316/LER-1984-023, :on 840829,fire Damper 2-HV-ACED-2 Inoperable During Manual Actuation of Low Pressure CO2 Fire Suppression Sys.Caused by pop-off Latch Caught on Protective Screen, Preventing Complete Closure of Damper |
- on 840829,fire Damper 2-HV-ACED-2 Inoperable During Manual Actuation of Low Pressure CO2 Fire Suppression Sys.Caused by pop-off Latch Caught on Protective Screen, Preventing Complete Closure of Damper
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| 05000315/LER-1984-023-01, :on 840709,steam Generator Blowdown Sample Not Composited Per Tech Spec Requirements.Cause Unknown.Ltr Issued to Insure Adequate Sample Vol Taken Whenever Sample Obtained |
- on 840709,steam Generator Blowdown Sample Not Composited Per Tech Spec Requirements.Cause Unknown.Ltr Issued to Insure Adequate Sample Vol Taken Whenever Sample Obtained
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| 05000316/LER-1984-024, :on 840911,reactor Trip Occurred Due to Loss of 120-volt Ac Vital Bus Inverter.Caused by Shorted C2 Capacitor on Shorting Circuit Board.Failed C2 Capacitor Replaced |
- on 840911,reactor Trip Occurred Due to Loss of 120-volt Ac Vital Bus Inverter.Caused by Shorted C2 Capacitor on Shorting Circuit Board.Failed C2 Capacitor Replaced
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| 05000315/LER-1984-024-01, :on 841002,during Surveillance Test,Spent Fuel Pool Exhaust Ventilation Sys Dampers Did Not Change Position to Direct Air Flow Through Charcoal Adsorbers.Cause Unknown.Investigation Revealed No Reason |
- on 841002,during Surveillance Test,Spent Fuel Pool Exhaust Ventilation Sys Dampers Did Not Change Position to Direct Air Flow Through Charcoal Adsorbers.Cause Unknown.Investigation Revealed No Reason
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| 05000315/LER-1984-025-01, :on 841108,firewater Ring Header Valve Surveillance Not Performed Per Tech Spec Requirements.Caused by Misidentification & Poor Labeling of Valves.Pipes & Valves Properly Labeled & Diagrams & Descriptions Corrected |
- on 841108,firewater Ring Header Valve Surveillance Not Performed Per Tech Spec Requirements.Caused by Misidentification & Poor Labeling of Valves.Pipes & Valves Properly Labeled & Diagrams & Descriptions Corrected
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