05000322/LER-1994-001, :on 940121,determined That Violation of Tech Spec 6.7.3.c Occurred.Caused by Failure to Follow Administrative Procedure on Control of Station Procedures. Temporary Procedure Change Reviewed & Approved1994-02-14014 February 1994
- on 940121,determined That Violation of Tech Spec 6.7.3.c Occurred.Caused by Failure to Follow Administrative Procedure on Control of Station Procedures. Temporary Procedure Change Reviewed & Approved
05000322/LER-1993-002, :on 931228,fire in Primary Containment Occurred Which Required Evaluation & off-site Fire Department Assistance.Caused by Uncovered Opening in Bioshield Wall in Slag Path.Procedures Revised1994-01-25025 January 1994
- on 931228,fire in Primary Containment Occurred Which Required Evaluation & off-site Fire Department Assistance.Caused by Uncovered Opening in Bioshield Wall in Slag Path.Procedures Revised
05000322/LER-1993-001, :on 930429,refueling Jib Crane Moved in Vicinity of Spent Fuel Pool Using vendor-supplied Lifting Eye in Violation of NUREG-0612.Caused by Failure to Identify Crane as Heavy Load.Meetings Held1993-06-11011 June 1993
- on 930429,refueling Jib Crane Moved in Vicinity of Spent Fuel Pool Using vendor-supplied Lifting Eye in Violation of NUREG-0612.Caused by Failure to Identify Crane as Heavy Load.Meetings Held
05000322/LER-1991-001, :on 910324,RB Normal Ventilation Sys (Rbnvs) Outboard Exhaust Valve Closed for No Apparent Reason.Cause Inconclusive.Sys Restored to Normal Lineup & Rbnvs Outboard Valve Will Be Stroked on Routine Basis1991-04-22022 April 1991
- on 910324,RB Normal Ventilation Sys (Rbnvs) Outboard Exhaust Valve Closed for No Apparent Reason.Cause Inconclusive.Sys Restored to Normal Lineup & Rbnvs Outboard Valve Will Be Stroked on Routine Basis
05000322/LER-1990-010, :on 901213,unplanned ESF Actuation Occurred in Control Room Air Conditioning & RB Standby Ventilation Sys B.Caused by Procedural Deficiency.Procedure Revised,Incident Rept Issued & Policy Established1991-01-0909 January 1991
- on 901213,unplanned ESF Actuation Occurred in Control Room Air Conditioning & RB Standby Ventilation Sys B.Caused by Procedural Deficiency.Procedure Revised,Incident Rept Issued & Policy Established
05000322/LER-1990-008, :on 900915,unplanned Actuation of ESF Sys Occurred Due to Lightning Strike.Damaged Remote Data Acquisition Unit Circuit Cards Replaced1990-10-0505 October 1990
- on 900915,unplanned Actuation of ESF Sys Occurred Due to Lightning Strike.Damaged Remote Data Acquisition Unit Circuit Cards Replaced
05000322/LER-1990-007, :on 900907,unplanned Actuation of ESF Sys Occurred During I&C Surveillance Test.Caused by Inadequate procedure.SP44.650.16 Revised to Require That Leads Lifted & Individually Separated1990-09-28028 September 1990
- on 900907,unplanned Actuation of ESF Sys Occurred During I&C Surveillance Test.Caused by Inadequate procedure.SP44.650.16 Revised to Require That Leads Lifted & Individually Separated
05000322/LER-1990-005, :on 900418,noted That on 791205,830808,851218, 861201,870703 & 890119 & 0510,conductor Failures Occurred. Caused by Loss or Reduction of Insulation Resistance or Loss of Continuity for Conductors in Assemblies1990-08-29029 August 1990
- on 900418,noted That on 791205,830808,851218, 861201,870703 & 890119 & 0510,conductor Failures Occurred. Caused by Loss or Reduction of Insulation Resistance or Loss of Continuity for Conductors in Assemblies
05000322/LER-1986-039, :on 861006,unplanned Initiation of Reactor Bldg Standby Ventilation Sys Occurred W/All Rods Inserted in Core.Caused by Faulty Design of Retaining Device.Warning Signs Attached to Valve Actuator & Valve Mod Initiated1990-05-16016 May 1990
- on 861006,unplanned Initiation of Reactor Bldg Standby Ventilation Sys Occurred W/All Rods Inserted in Core.Caused by Faulty Design of Retaining Device.Warning Signs Attached to Valve Actuator & Valve Mod Initiated
05000322/LER-1989-003, :on 890310,emergency Diesel Generator (EDG) 102 Manually Shutdown During 18-month Surveillance Test Due to Failure of EDG Output Breaker.Cause Not Determined. Replacement Breaker Installed in Cubicle 102-81990-05-16016 May 1990
- on 890310,emergency Diesel Generator (EDG) 102 Manually Shutdown During 18-month Surveillance Test Due to Failure of EDG Output Breaker.Cause Not Determined. Replacement Breaker Installed in Cubicle 102-8
05000322/LER-1985-059, :on 851219,half Reactor Trip,Full NSSS Shutoff Sys Isolation & Reactor Bldg Standby Ventilation Sys Initiation Occurred Due to Loss of Power to Reactor Protection Sys Bus B.Assembly Breaker Reset1990-05-16016 May 1990
- on 851219,half Reactor Trip,Full NSSS Shutoff Sys Isolation & Reactor Bldg Standby Ventilation Sys Initiation Occurred Due to Loss of Power to Reactor Protection Sys Bus B.Assembly Breaker Reset
05000322/LER-1988-003, :on 880322,unplanned Automatic Initiation of Reactor Bldg Standby Ventilation Sys Side a Occurred During Deenergization of Relay.Caused by Close Placement of Relay Terminals.Wiring Inside Electrical Panels Reworked1990-05-16016 May 1990
- on 880322,unplanned Automatic Initiation of Reactor Bldg Standby Ventilation Sys Side a Occurred During Deenergization of Relay.Caused by Close Placement of Relay Terminals.Wiring Inside Electrical Panels Reworked
05000322/LER-1987-022, :on 870604,HPCI Test Valve to Condensate Storage Tank,Globe Valve & Hpci/Rcic Test Valve to Condensate Storage Tank Failed to Close Against Sys Operating Pressure.Disc of motor-operated Valve 37 Modified1990-05-16016 May 1990
- on 870604,HPCI Test Valve to Condensate Storage Tank,Globe Valve & Hpci/Rcic Test Valve to Condensate Storage Tank Failed to Close Against Sys Operating Pressure.Disc of motor-operated Valve 37 Modified
05000322/LER-1986-014, :on 860305,full Reactor Trip Occurred Due to Momentary False Low Vessel Level Signal,Causing Hydraulic Pressure Spike in Ref Leg A.Bourton Tube Type Pressure Transmitter Replaced W/Rosemount Model 11531990-05-16016 May 1990
- on 860305,full Reactor Trip Occurred Due to Momentary False Low Vessel Level Signal,Causing Hydraulic Pressure Spike in Ref Leg A.Bourton Tube Type Pressure Transmitter Replaced W/Rosemount Model 1153
05000322/LER-1988-017, :on 881025,discovered That Seismic Monitoring Instrumentation Returned to Svc Prior to Verifying Sys Operability & Special Rept Not Written.Caused by Personnel Error.Surveillance Engineer Reassigned1990-05-16016 May 1990
- on 881025,discovered That Seismic Monitoring Instrumentation Returned to Svc Prior to Verifying Sys Operability & Special Rept Not Written.Caused by Personnel Error.Surveillance Engineer Reassigned
05000322/LER-1988-015, :on 880916,seismic Monitoring Instrumentation, Including Peak Acceleration Recorders,Removed from Svc for More than 30 Days Due to Corrosion on Scratch Plates.Cover Gasket Replaced & Thermal Barrier Mount to Be Installed1990-05-16016 May 1990
- on 880916,seismic Monitoring Instrumentation, Including Peak Acceleration Recorders,Removed from Svc for More than 30 Days Due to Corrosion on Scratch Plates.Cover Gasket Replaced & Thermal Barrier Mount to Be Installed
05000322/LER-1986-032, :on 860728,RWCU Isolated on High Differential Flow Sensed by Steam Leak Detection Sys While Placing Filter Demineralizers in Operation.Cause Not Determined. Operating Procedures Revised to Monitor RWCU Sys1990-05-16016 May 1990
- on 860728,RWCU Isolated on High Differential Flow Sensed by Steam Leak Detection Sys While Placing Filter Demineralizers in Operation.Cause Not Determined. Operating Procedures Revised to Monitor RWCU Sys
05000322/LER-1989-005, :on 890321,results of Local Leak Rate Test of Core Spray Suction Valve a Determined That Leakage,When Combined W/All Type B & C Penetration Leakages,Exceeded Tech Spec Limit.Caused by Normal Valve Degradation1990-05-16016 May 1990
- on 890321,results of Local Leak Rate Test of Core Spray Suction Valve a Determined That Leakage,When Combined W/All Type B & C Penetration Leakages,Exceeded Tech Spec Limit.Caused by Normal Valve Degradation
05000322/LER-1987-009, :on 870203,full Reactor Trip Occurred Due to Perturbation in Ref Leg.Caused by Spurious Low Level Reactor Pressure Vessel Water Level Signal.Existing Level & Pressure Transmitters Replaced W/Newer Models1990-05-16016 May 1990
- on 870203,full Reactor Trip Occurred Due to Perturbation in Ref Leg.Caused by Spurious Low Level Reactor Pressure Vessel Water Level Signal.Existing Level & Pressure Transmitters Replaced W/Newer Models
05000322/LER-1987-012, :on 870504,uplanned Actuation of ESF Occurred. Caused by Technician Loosing Footing & Accidently Hitting Outside Cover of Level Switch.Permanent Ladders & Platforms Installed at Head Tank Level Switches1990-05-16016 May 1990
- on 870504,uplanned Actuation of ESF Occurred. Caused by Technician Loosing Footing & Accidently Hitting Outside Cover of Level Switch.Permanent Ladders & Platforms Installed at Head Tank Level Switches
05000322/LER-1987-035, :on 871221,880106 & 0330,high Energy Line Break Logic Isolations of RWCU & Main Steam Line Drain Valves Occurred.Caused by Problems W/Temp Monitoring Units. Grounding Scheme Changed & Transformers Rewired1990-05-16016 May 1990
- on 871221,880106 & 0330,high Energy Line Break Logic Isolations of RWCU & Main Steam Line Drain Valves Occurred.Caused by Problems W/Temp Monitoring Units. Grounding Scheme Changed & Transformers Rewired
05000322/LER-1990-004, :on 900226,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred During Implementation of Sys Layup.Caused by Procedural Error.Change to NS4 Slip Made to Correct Fuse Location1990-03-23023 March 1990
- on 900226,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred During Implementation of Sys Layup.Caused by Procedural Error.Change to NS4 Slip Made to Correct Fuse Location
05000322/LER-1986-029, :on 860718,19,21 & 870508,loss of Reactor Protection Sys Power Occurred Due to Spurious Tripping of Alternate Feed EPA Breakers.Caused by Low Output Voltage of Alternate Feed Transformer.Output Adjusted1990-03-16016 March 1990
- on 860718,19,21 & 870508,loss of Reactor Protection Sys Power Occurred Due to Spurious Tripping of Alternate Feed EPA Breakers.Caused by Low Output Voltage of Alternate Feed Transformer.Output Adjusted
05000322/LER-1990-003, :on 900129,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred.Caused by Inadequate Procedural Guidance.Preventive Maint Scheduled Activity Worksheet for 24 Volt Dc Power Supply Will Be Revised1990-02-23023 February 1990
- on 900129,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred.Caused by Inadequate Procedural Guidance.Preventive Maint Scheduled Activity Worksheet for 24 Volt Dc Power Supply Will Be Revised
05000322/LER-1990-002, :on 900128,unplanned ESF Reactor Bldg Standby Ventilation Sys Occurred.Caused by Inadequate Procedure. Sys Layup Implementation Package Prepared & Reviewers Will Be Cautioned to Be Most Conservative When Preparing Package1990-02-23023 February 1990
- on 900128,unplanned ESF Reactor Bldg Standby Ventilation Sys Occurred.Caused by Inadequate Procedure. Sys Layup Implementation Package Prepared & Reviewers Will Be Cautioned to Be Most Conservative When Preparing Package
05000322/LER-1990-001, :on 900117,unplanned Actuation of ESF Reactor Bldg Standby Ventilation Sys B Occurred,Causing Interlocking Relays in Control Circuits to Deenergize.Caused by Transient Voltage Dip.Procedures Re Bus Loads Modified1990-02-0909 February 1990
- on 900117,unplanned Actuation of ESF Reactor Bldg Standby Ventilation Sys B Occurred,Causing Interlocking Relays in Control Circuits to Deenergize.Caused by Transient Voltage Dip.Procedures Re Bus Loads Modified
05000322/LER-1989-011, :on 891222,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred When Performing Sys Layup Implementation Package for Hpci.Caused by Inadequate Procedure.Breaker Positions Changed1990-01-12012 January 1990
- on 891222,unplanned Actuation of ESF Primary Containment Isolation Sys Occurred When Performing Sys Layup Implementation Package for Hpci.Caused by Inadequate Procedure.Breaker Positions Changed
05000322/LER-1989-010, :on 891212,unplanned Actuation of ESF Control Room Air Conditioning Train a Occurred.Caused by Removal of Leads from Relay During Test to Prevent ESF Sys Actuations. Electrical Relay Replaced & Wiring Mod Made1990-01-11011 January 1990
- on 891212,unplanned Actuation of ESF Control Room Air Conditioning Train a Occurred.Caused by Removal of Leads from Relay During Test to Prevent ESF Sys Actuations. Electrical Relay Replaced & Wiring Mod Made
05000322/LER-1989-009, :on 891115,notification Received of Potential Failure Mechanism of Four 3-way Solenoid Operated Pilot Valves.Caused by Incorrect Mounting of Valves.Valves Remounted Vertically & Field Walkdown Done1989-12-15015 December 1989
- on 891115,notification Received of Potential Failure Mechanism of Four 3-way Solenoid Operated Pilot Valves.Caused by Incorrect Mounting of Valves.Valves Remounted Vertically & Field Walkdown Done
05000322/LER-1989-008, :on 891016,control Room Alarms Received Indicating Fire Pump Had Started & Deluge Valve Had Opened. Caused by Actuation of Manual Pull Station.Deluge Sys Restored to Normal & Personnel Interviewed1989-11-15015 November 1989
- on 891016,control Room Alarms Received Indicating Fire Pump Had Started & Deluge Valve Had Opened. Caused by Actuation of Manual Pull Station.Deluge Sys Restored to Normal & Personnel Interviewed
05000322/LER-1989-007, :on 890823,full Reactor Trip & Nuclear Steam Supply Shutoff Sys Actuation Occurred While Transferring Power Supply.Caused by Operator Error.Operations Personnel Instructed to Review Procedure1989-09-22022 September 1989
- on 890823,full Reactor Trip & Nuclear Steam Supply Shutoff Sys Actuation Occurred While Transferring Power Supply.Caused by Operator Error.Operations Personnel Instructed to Review Procedure
05000322/LER-1989-006, :on 890707,hydraulic Transient Inadvertently Initiated Which Resulted in Automatic ESF & Reactor Trip. Caused by Personnel Error.Reactor Trip & Analog Trip Alarms Reset.Personnel Involved Counseled1989-08-0404 August 1989
- on 890707,hydraulic Transient Inadvertently Initiated Which Resulted in Automatic ESF & Reactor Trip. Caused by Personnel Error.Reactor Trip & Analog Trip Alarms Reset.Personnel Involved Counseled
05000322/LER-1989-004, :on 890314,inadvertent Reactor Bldg Closed Loop Cooling Water Isolation/Split Occurred After Tech Specs Surveillance Test on Emergency Bus 101.Caused by Inadequate Procedural Guidance.Procedure Revised1989-04-13013 April 1989
- on 890314,inadvertent Reactor Bldg Closed Loop Cooling Water Isolation/Split Occurred After Tech Specs Surveillance Test on Emergency Bus 101.Caused by Inadequate Procedural Guidance.Procedure Revised
05000322/LER-1989-002, :on 890309,full Reactor Protection Sys (RPS) Actuation Occurred While Attempting to Restore Power to RPS Bus B,Causing Reactor Trip.Caused by Personnel Error While Troubleshooting.Trip Setpoints Adjusted1989-04-0707 April 1989
- on 890309,full Reactor Protection Sys (RPS) Actuation Occurred While Attempting to Restore Power to RPS Bus B,Causing Reactor Trip.Caused by Personnel Error While Troubleshooting.Trip Setpoints Adjusted
05000322/LER-1989-001, :on 890124,ESF Actuations Occurred Due to EPA Breaker Trip.Caused by Undervoltage Condition.Output Voltage of MG a Set Adjusted to 121.5 Volt Ac Unloaded.Preventive Maint Program Revised1989-02-23023 February 1989
- on 890124,ESF Actuations Occurred Due to EPA Breaker Trip.Caused by Undervoltage Condition.Output Voltage of MG a Set Adjusted to 121.5 Volt Ac Unloaded.Preventive Maint Program Revised
05000322/LER-1988-019, :on 881106,reactor Building Closed Loop Cooling Water Split on lo-lo Head Tank Level During Placement of HX Into Svc Due to Filling & Venting Problem.Procedure Identifying Deficiencies Performed1988-12-0505 December 1988
- on 881106,reactor Building Closed Loop Cooling Water Split on lo-lo Head Tank Level During Placement of HX Into Svc Due to Filling & Venting Problem.Procedure Identifying Deficiencies Performed
05000322/LER-1988-018, :on 881101,RWCU Isolation Occurred.Caused by Inadequate Job Briefing Between Watch Engineer & Operating Crew.Operators Actions During Future Performance of Faston Tab Installations Will Be Proceduralized1988-11-30030 November 1988
- on 881101,RWCU Isolation Occurred.Caused by Inadequate Job Briefing Between Watch Engineer & Operating Crew.Operators Actions During Future Performance of Faston Tab Installations Will Be Proceduralized
05000322/LER-1988-016, :on 881011,fluctuation in Sys Voltage Occurred & Numerous ESF Actuated Due to External Source.Caused by Circumstances Beyond Control of Plant.No Corrective Actions Warranted & LER Will Become Required Reading1988-11-10010 November 1988
- on 881011,fluctuation in Sys Voltage Occurred & Numerous ESF Actuated Due to External Source.Caused by Circumstances Beyond Control of Plant.No Corrective Actions Warranted & LER Will Become Required Reading
05000322/LER-1988-010, :on 880614,discovered That Radiochemistry Technicians Took Svc Water Samples at Inlet Side of RHR HX a Instead of Outlet Side.Caused by Inlet Svc Water Drain Line Isolation Valves Not Labeled1988-10-19019 October 1988
- on 880614,discovered That Radiochemistry Technicians Took Svc Water Samples at Inlet Side of RHR HX a Instead of Outlet Side.Caused by Inlet Svc Water Drain Line Isolation Valves Not Labeled
05000322/LER-1988-014, :on 880907,reactor Trip & ESF Actuation Occurred During Drywell Bypass Leakage Test.Caused by Test & Calibr Modules Not Properly Bypassed.Procedure Change Notice Re Hold Off Tags Submitted1988-10-0707 October 1988
- on 880907,reactor Trip & ESF Actuation Occurred During Drywell Bypass Leakage Test.Caused by Test & Calibr Modules Not Properly Bypassed.Procedure Change Notice Re Hold Off Tags Submitted
05000322/LER-1988-013, :on 880810,seismic Monitoring Instrumentation Inoperable for More than 30 Days Due to Calibr.Replacement Parts Unavailable During Calibr.New Parts Expected to Be Onsite by 8809301988-09-19019 September 1988
- on 880810,seismic Monitoring Instrumentation Inoperable for More than 30 Days Due to Calibr.Replacement Parts Unavailable During Calibr.New Parts Expected to Be Onsite by 880930
05000322/LER-1988-008, :on 880608,three Seismic Recorders Located on Control Bldg Disabled.Caused by Personnel Error.Event Will Be Incorporated Into Continuing Training Program for All Instrumentation & Control Personnel1988-07-0707 July 1988
- on 880608,three Seismic Recorders Located on Control Bldg Disabled.Caused by Personnel Error.Event Will Be Incorporated Into Continuing Training Program for All Instrumentation & Control Personnel
05000322/LER-1988-009, :on 880609,watch Engineer Notified of Incorrect Emergency Diesel Generator Fuel Oil Sulfur Analysis Using ASTM D-4294 in Lieu of ASTM D129.Caused by Vendor Error in Documentation.Vendor Revised Data Sheets1988-07-0101 July 1988
- on 880609,watch Engineer Notified of Incorrect Emergency Diesel Generator Fuel Oil Sulfur Analysis Using ASTM D-4294 in Lieu of ASTM D129.Caused by Vendor Error in Documentation.Vendor Revised Data Sheets
05000322/LER-1988-007, :on 880528,unplanned ESF Actuations Occurred When Equipment Operator Inadvertently Opened Wrong Breaker During Tagging Operation.Caused by Personnel Error.Personnel Involved Counseled1988-06-24024 June 1988
- on 880528,unplanned ESF Actuations Occurred When Equipment Operator Inadvertently Opened Wrong Breaker During Tagging Operation.Caused by Personnel Error.Personnel Involved Counseled
05000322/LER-1986-011, :on 860318,annual Soundings of Intake Canal Show Two Transects W/Readings of -10.3 & -10.7 Ft Mean Low Water.Decrease in Depth Caused by Normal Deposition. Dredging on Hold Until Issue Settled1988-06-24024 June 1988
- on 860318,annual Soundings of Intake Canal Show Two Transects W/Readings of -10.3 & -10.7 Ft Mean Low Water.Decrease in Depth Caused by Normal Deposition. Dredging on Hold Until Issue Settled
05000322/LER-1988-006, :on 880430,loss of Emergency Bus 101 Occurred W/Subsequent Start of Emergency Diesel Generator 101 & Numerous ESF Actuations.Caused by Personnel Error.Procedural Revs Implemented to Emphasize Impact of Steps1988-05-27027 May 1988
- on 880430,loss of Emergency Bus 101 Occurred W/Subsequent Start of Emergency Diesel Generator 101 & Numerous ESF Actuations.Caused by Personnel Error.Procedural Revs Implemented to Emphasize Impact of Steps
05000322/LER-1988-005, :on 880509,meteorological Instrumentation Out of Calibr.Caused by Inability of Installed Instrumentation to Meet Tolerence of Reg Guide.Investigation Being Conducted by Instrumentation & Control1988-05-26026 May 1988
- on 880509,meteorological Instrumentation Out of Calibr.Caused by Inability of Installed Instrumentation to Meet Tolerence of Reg Guide.Investigation Being Conducted by Instrumentation & Control
05000322/LER-1988-004, :on 880424,seismic Monitoring Instrumentation in Reactor Bldg Taken Out of Svc for More than 30 Days for Calibr.New Procedure Will Eliminate Instrument Time Out of Svc Problem1988-05-24024 May 1988
- on 880424,seismic Monitoring Instrumentation in Reactor Bldg Taken Out of Svc for More than 30 Days for Calibr.New Procedure Will Eliminate Instrument Time Out of Svc Problem
05000322/LER-1988-002, :on 880222,fire Protection Surveillances Required by Tech Specs Missed.Caused by Personnel Error. Fire Protection Technicians Responsible for Performance of Surveillances Instructed1988-03-18018 March 1988
- on 880222,fire Protection Surveillances Required by Tech Specs Missed.Caused by Personnel Error. Fire Protection Technicians Responsible for Performance of Surveillances Instructed
05000322/LER-1988-001, :on 880128,loss of Continuous Monitoring of Station Ventilation Exhaust Occurred.Caused by Personnel Error.Lead Mechanic to Requalify,Incident Discussed W/Maint Personnel & All Personnel Required to Read LER1988-02-26026 February 1988
- on 880128,loss of Continuous Monitoring of Station Ventilation Exhaust Occurred.Caused by Personnel Error.Lead Mechanic to Requalify,Incident Discussed W/Maint Personnel & All Personnel Required to Read LER