Pages that link to "05000482/LER-2008-001, Regarding Completion of a Technical Specification Required Shutdown"

The following pages link to 05000482/LER-2008-001, Regarding Completion of a Technical Specification Required Shutdown:

Displayed 10 items.

• 05000482/LER-2008-001 (redirect page) ‎ (← links)
  • 05000482/LER-2015-001, Personnel Error Causes Two Inoperable Residual Heat Removal Trains ‎ (← links)
  • 05000482/LER-2015-002, Two Control Room Air Conditioning Trains Inoperable Due to Failure to Meet Surveillance Requirement ‎ (← links)
  • 05000482/LER-2015-003, Manual Reactor Trip due to High Steam Generator Level Transient at Low Power ‎ (← links)
  • 05000482/LER-2015-004, Incorrect Decision Results in Two Containment Isolation Valves being in a Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-2010-011 ‎ (← links)
  • 05000482/LER-2002-003 ‎ (← links)
  • 05000482/LER-2002-002 ‎ (← links)
  • 05000482/LER-2006-001 ‎ (← links)
  • 05000482/LER-2017-002 ‎ (← links)
  • ML081430159 ‎ (← links)
  • 05000482/LER-1985-057, Responds to NRC 850809 Request for Addl Info Re Cutler- Hammer Type E30 Pushbutton Switches,Per LER 85-057-00 Re 850712 Control Room Ventilation Isolation Signal.Util, Cutler-Hammer,Inc & Bechtel Investigations in Progress ‎ (← links)
  • 05000482/LER-1988-028, Partially Deleted LER 88-028-00:on 881209,0.7093 Uci Co-60 Removed from Chin.Caused Likely When Individual Deposited Tools Just Prior to Exiting Containment.Surveys Taken in Area for Hot Particles ‎ (← links)
  • 05000482/LER-1950-482, FOIA Request for Documents Re Plant LER 50-482/88-028 W/All Revs & Suppls ‎ (← links)
  • 05000482/LER-1993-006, Forwards LER 93-006-00 Re Exposure of Individual in Excess of Applicable Limits in 10CFR20.101 ‎ (← links)
  • 05000482/LER-2024-001-01, Mode 3 Entry with One Auxiliary Feedwater Pump Train Inoperable Due to Missed Post-Maintenance Testing ‎ (← links)
  • 05000482/LER-2024-002, Technical Specification Required Shutdown Due to Inoperable Auxiliary Feedwater Discharge Valve ‎ (← links)
  • 05000482/LER-2024-001, Mode 3 Entry with One Auxiliary Feedwater Pump Train Inoperable Due to Missed Post-Maintenance Testing ‎ (← links)
  • 05000482/LER-2022-001, Low Steam Generator Level Due to Main Feedwater Valve Failure Caused Reactor Trip ‎ (← links)
  • 05000482/LER-2021-004, Low Steam Generator Level Due to Main Feedwater Valve Failure Caused Automatic Reactor Trip ‎ (← links)
  • 05000482/LER-2021-003, Re Automatic Reactor Trip Due to Low Steam Generator Level ‎ (← links)
  • 05000482/LER-2021-001-01, Re Entry Into Mode 4 with Excessive Containment Valve Leakage Resulted in a Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-2021-001, Entry Into Mode 4 with Excessive Containment Valve Leakage Resulted in a Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-1997-020, :on 971109,failure to Meet Snubber TS LCO Requirements Was Noted.Caused by Manufacturing Errors. Performed Sys Walkdowns,Replacement & Evaluations of Failed Snubbers & Associated Piping Sections ‎ (← links)
  • 05000482/LER-1998-003, :on 980505,analog Channel Operational Test Did Not Meet TS Requirements.Caused by Incorrect Assumptions. Submitted License Amend Request to Allow 6 H to Place an Inoperable Channel in Bypass Condition ‎ (← links)
  • 05000482/LER-1989-018, :on 890828,inoperability of Both Exhaust Sys Resulted Due to Failure to Place Dampers in Safeguard Position.Lesson Plan Issued on Tagging of Ventilation Dampers to Personnel ‎ (← links)
  • 05000482/LER-1989-017, :on 890830,control Room Ventilation Isolation Signal Initiated When Chlorine Monitor Indicated High Level. Caused by Spurious Spike.Recorder Connected to Chlorine Monitor GK-AITS-3 to Monitor Channel Behavior ‎ (← links)
  • 05000482/LER-1989-012, :on 890626,control Room Ventilation Isolation Signal Initiated When Control Room Air Intake Radiation Monitor GKRE-04 Experienced Loss of Power.Caused by Blown Fuse.Fuse Replaced ‎ (← links)
  • 05000482/LER-1989-010, :on 890616,discovered That Tech Spec Requirement 4.11.2.6 Re Quantity of Radioactive Matl Not Met.Caused by Inadequate Programmatic Controls.Procedures Re Gas Decay Tank Additions Revised ‎ (← links)
  • 05000482/LER-1989-011, :on 890623,both Class 1E Air Conditioning Units SGK05A & SGK05B Were Inoperable.Caused by Loose Wire Disconnected from Lug on pump-down Switch.Wire Recrimped & Units Returned to Svc.Personnel Reinstructed ‎ (← links)
  • 05000482/LER-1989-009, :on 890419,exams of Fire Protection Sys Piping Revealed Incomplete Penetration of Pipe Seam Welds Existed in Discharge Header for motor-driven Fire Pump.Cause Unknown.Evaluation of Piping Being Conducted ‎ (← links)
  • 05000482/LER-1998-002, :on 980409,inadequate Evaluation of RCP LO LCS Nonconforming Condition Was Noted.Caused by Personnel Error. Mod Correcting Nonconformance Has Been Implemented & Evaluations Completed ‎ (← links)
  • 05000482/LER-1989-016, :on 890809,discovered That Surveillance Procedure for Train B Reactor Trip Breaker Trip Actuating Device Operational Test Not Performed by 890703.Caused by Personnel Error.Program Enhancement Made ‎ (← links)
  • 05000482/LER-1997-018, :on 971001,multiple Failures of B Rhrp to Start Were Noted.Caused by Breaker Closing Circuit Not Achieving Continuity After Switch Was Actuated.Adjusted Breakers Positive Interlock Roller ‎ (← links)
  • 05000482/LER-1989-014, :on 890718,control Room Ventilation Isolation Signal Initiated by Spike on Control Room Air Intake Radiation Monitor.Caused by Voltage Transient Associated W/ Lamp Burning Out.Monitor Restored ‎ (← links)
  • 05000482/LER-1989-015, :on 890717,discovered That Violation of Sampling Requirements of Tech Spec 3.11.1.1 Occurred.On 890716,daily Grab Sample Not Obtained for Continuous Liquid Effluent Release.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1988-030, :on 890524,discovered That Violation of Tech Spec 3.5.2 Occurred Resulting in Containment Insp Not Properly Documented Following Containment Entries on 880102 & 05.Cause Unknown.Schedule Revised ‎ (← links)
  • 05000482/LER-1989-013, :on 890711,feedwater Isolation Signal Occurred When Water in Steam Generator a Increased to hi-hi Level Setpoint,Causing Main Turbine Trip Signal.Caused by Leakage Through Bypass Control Valves ‎ (← links)
  • 05000482/LER-1989-008, :on 890329,discovered That Surveillance Procedure Not Performed on 890308,following 1h 21 Minute Run of Emergency Diesel Generator.Caused by Personnel Error. Procedure Will Be Revised by 890522 ‎ (← links)
  • 05000482/LER-1987-043, :on 870929,discovered That Testing of Power Range Neutron Flux Low Setpoint & Reactor Trip Sys Interlocks P-8,P-9 & P-10 Not Performed,Per Tech Spec Requirements.Caused by Procedural Deficiencies ‎ (← links)
  • 05000482/LER-1989-007, :on 890314,surveillance Procedure Not Performed at Scheduled Time.Caused by Personnel Error.Operations Mgt Counseled Operating Crew Involved Re Ramifications of Error ‎ (← links)
  • 05000482/LER-1988-021, :on 881025,containment Cooling Fan Inoperability Occurred Due to Motor Overcurrent Condition. Cause Under Evaluation.Motor Replaced W/Qualified Motor ‎ (← links)
  • 05000482/LER-1989-006, :on 890308,discovered That Chemistry Procedure for Performance of Emergency Diesel Generator New Fuel Oil Sampling Did Not Meet Surveillance Requirement.Caused by Personnel Error.Sts CH-015 Revised ‎ (← links)
  • 05000482/LER-1987-033, :on 870813,tests of All Types B & C Valves Indicated Leakage in Excess of Tech Spec Limit.Caused by Cognitive Personnel Error.Ltr Issued Outlining Testing Requirements & Maint Activities ‎ (← links)
  • 05000482/LER-1987-031, :on 870811,fuel Pool Cooling HX Doors Not Certified as 3 H Fire Rated Barriers Per Tech Spec Section 3.7.11.Cause Not Determined.Design Change Implemented to Install Fire Rated Doors ‎ (← links)
  • 05000482/LER-1998-001, :on 980304,noted That Pressurizer Code Safety Valves Indicate Five Random Failures in Last Twelve Tests. Caused by Incapability of Valves to Meet Restrictive Tolerance of +/-1% of Valve Pressure.Ts Will Be Amended ‎ (← links)
  • 05000482/LER-1998-001-01, Forwards LER 98-001-01 Re Pressurizer Code Safety Valves Being Outside of +/-1% Lift Setting Tolerance Allowed by Ts. Commitments Made by Util,Encl ‎ (← links)
  • 05000482/LER-1987-054, :on 871127,ESF Actuated.Caused by Moisture Induced Corrosion of Electrical Connector on Radiation Monitor Skid.Connector Cleaned & Sealed W/Heat Shrink Moisture Seal ‎ (← links)
  • 05000482/LER-1987-030, :on 870720,reactor Trip Occurred.Caused by Equipment Failure of Potential Transformer.Plant Mod Will Be Implemented to Provide More Reliable Source of Power.On 870721,shutdown Sequencer Actuation Occurred ‎ (← links)
  • 05000482/LER-1987-032, :on 870724,control Room Ventilation Isolation Signal Occurred Due to Chlorine Monitor Indicating High Chlorine Level.Caused by Broken Chemically Sensitive Paper Tape.Paper Tape Replaced ‎ (← links)
  • 05000482/LER-1987-053, :on 871123,control Room Ventilation Isolation Signal Occurred.Caused by MDA Scientific,Inc Chlorine Monitor GK-AITS-3 Paper Tape Bunching Up.Bunched Up Portion Removed & Tape Replaced ‎ (← links)
  • 05000482/LER-1987-052, :on 871118,installed Instrument Termination Splices Failed to Meet Environ Qualification Requirements. Caused by Undetailed Work Instructions,Inadequate Training & Lack of Mfg Instructions.Splices Reworked ‎ (← links)
  • 05000482/LER-1987-022, :on 870528,reactor Trip & ESF Actuation Occurred.Caused by Turbine Bldg Fan Breaker Malfunction. Preventive Maint for Loose Connections on Breaker Cubicle Integrated W/Maint of Stated Equipment ‎ (← links)
  • 05000482/LER-1997-010, :on 970904,deficient Surveillance Tests Were Identified During GL 96-01 Reviews.Caused by Inadequate or Incomplete Procedures.Revised Procedures & Relay Contacts Were Successfully Tested ‎ (← links)
  • 05000482/LER-1997-010-03, Forwards LER 97-010-03,concerning Three Surveillance Test Deficiencies Found During GL 96-01 Review.Final Suppl to LER Detailing Root Cause & Corrective Actions ‎ (← links)
  • 05000482/LER-1987-049, :on 871015,isolation Signals for Containment Purge,Control Room Ventilation & Fuel Bldg Actuated Due to Low Battery Voltage.Caused by Personnel Error.Procedure Will Be Written Re Supplying Power to Batteries ‎ (← links)
  • 05000482/LER-1987-050, :on 871014,containment Isolation Valve Failed During Local Leak Rate Test.Apparent Cause of Valve Sticking Open Not Determined.Event Considered Isolated & No Other Corrective Action Planned ‎ (← links)
  • 05000482/LER-1987-045, :on 871002,determined That on Four Occasions Between 861118 & 1207,ASME Boiler & Pressure Vessel Code Piping Not Properly Pressure Tested Following Repair.Caused by Inadequate Procedure.Procedures Revised ‎ (← links)
  • 05000482/LER-1987-042, :on 870930,hi-hi Water Level in Steam Generator D Initiated Feedwater Isolation Signal Tripping Main Turbine & Feedwater Pump.Caused by Cognitive Personnel Error.Sys Restored & Personnel Involved Counseled ‎ (← links)
  • 05000482/LER-1987-029, :on 870701,discovered Verification of Automatic Pathway Isolation Not Performed on Quarterly Basis,Per Tech Spec 3.3.3.11.Caused by Faulty Procedures.Surveillance Completed on 870702.Procedures Will Be Updated ‎ (← links)
  • 05000482/LER-1987-027, :on 870629,partial Loss of Feedwater Flow Occurred Due to Separation of Instrument Line Fitting.Caused by Personnel Installation Error.Fitting Tightened & Insps of Similar Connections Conducted ‎ (← links)
  • 05000482/LER-1987-044, :on 870930,discovered That Snubber AE04-R005 Had Not Been Visually Inspected During First Refueling Outage,Per Tech Spec 4.7.8.Caused by Procedural Errors by Nonlicensed Personnel When Revising Procedure ‎ (← links)
  • 05000482/LER-1987-041, :on 870927,reactor Trip Occurred from Approx 86% Power as Result of Power Range Flux High Negative Rate. Caused by Cognitive Personnel Error.Evaluation to Remove Switch Handles Will Be Conducted ‎ (← links)
  • 05000482/LER-1987-026, :on 870625,discovered That Spent Fuel Bldg Vent Tritium Sampling & Analysis Not Performed within Tech Spec Specified Time Frame.Caused by Personnel & Procedural Error. Procedure Revised & Technicians Counseled ‎ (← links)
  • 05000482/LER-1987-040, :on 870918,determined That ESF Actuation Sys Bistable Trip Setpoints Set at Value Less Conservative than Trip Setpoint in Offsite Dose Calculation Manual.Caused by Personnel Error.Trip Setpoints Reset ‎ (← links)
  • 05000482/LER-1987-025, :on 870623,ESFAS Initiated During Performance of Surveillance Test Procedure.Caused by Personnel Error. Surveillance Test Procedures Revised ‎ (← links)
  • 05000482/LER-1987-038, :on 870918,determined That Operability of Electric & Diesel Driven Fire Pumps Not Properly Verified. Caused by Procedural Deficiency.Surveillance Procedure Revised & Surveillance Test Performed ‎ (← links)
  • 05000482/LER-1987-039, :on 870916,absence of Position Indication for Pressurizer PORV BB-PCV-456A Block Valve Bb HV-8000B Discovered.Probably Caused by Personnel Error.Discussions Held W/Involved Personnel & Supervisors ‎ (← links)
  • 05000482/LER-1987-028, :on 850128 & 861107,Class IE 125-volt Batteries Outside Category B Limits.Caused by Inadequate post-test Procedure Review.Personnel Counseled,Addl Review Required by Maint Engineer & Procedure Revised ‎ (← links)
  • 05000482/LER-1987-037, :on 870910,reactor Trip,Feedwater Isolation & Auxiliary Feedwater Actuation Occurred Due to Failed Conductor.Caused by High Resistance & Heating at Bolted T-pad Connection.Line Conductor Replaced ‎ (← links)
  • 05000482/LER-1989-005, :on 890206,failure to Obtain Gaseous Grab Sample of Unit Vent Following 15% Change in Rated Thermal Power Discovered.Caused by Cognitive Personnel Error. Involved Individual Counseled ‎ (← links)
  • 05000482/LER-1989-004, :on 890202,reactor Trip Occurred from 100% Power as Result of Steam Generator Reaching lo-lo Level Trip Setpoint.Caused by Loose Screw on Terminal Strip in Solid State Protection Sys.Other Cabinets Checked ‎ (← links)
  • 05000482/LER-1987-015, :on 870412,control Room Ventilation Isolation Signal Occurred Due to High Chlorine Level in Outside Air Makeup.Caused by Bunching Up of Paper Tape Used as Chlorine Detector.Paper Tape Replaced ‎ (← links)
  • 05000482/LER-1987-020, :on 870506,control Room Ventilation Isolation Signal Occurred Due to High Chlorine Level in Outside Air Makeup.Caused by Breaking of Paper Tape Used as Chlorine Detector.Paper Tape Replaced ‎ (← links)
  • 05000482/LER-1989-003, :on 890131,discovered That Several Lugs Improperly Crimped Per Current Stds,Resulting in Degradation of Fire Protection Sys.Caused by No Specific Unique Util Imposed Crimping Stds for Panels ‎ (← links)
  • 05000482/LER-1987-035, :on 870903,control Room Ventilation Isolation Signals Occurred.Caused by Malfunctions of Chlorine Monitors.Signal Reset & Monitor Placed in Bypass for Troubleshooting ‎ (← links)
  • 05000482/LER-1987-024, :on 870615,control Room Ventilation Isolation Signal Occurred Due to Loss of Power to Chlorine Monitor Gk AITS-3.Caused by Blown Fuse in Power Supply.Sample Pump Replaced & Monitor Returned to Svc ‎ (← links)
  • 05000482/LER-1987-036, :on 870726,inadvertent Release of Secondary Liquid Waste Monitor Tank a Occurred W/O Prior Sampling. Caused by Procedural Inadequacy.Procedure Sys HF-200 Revised ‎ (← links)
  • 05000482/LER-1989-002, :on 890123,reactor Trip Occurred.Caused by Spurious Signal in Vibration Monitoring Circuitry Which Incorrectly Indicated High Vibration on Main Turbine 7 Bearing.Turbine High Vibration Trip Modified ‎ (← links)
  • 05000482/LER-1987-050-01, Revised LER 87-050-01:on 871014,containment Isolation Valve Failed During Local Leak Rate Test Causing Total Path Leakage to Exceed Tech Spec Limits.Caused by Containment Isolation Check Valve Sticking Open ‎ (← links)
  • 05000482/LER-1987-023, :on 870601,shaft Seal on Containment Air Lock Failed During Local Leak Test,Causing Total Leak to Exceed Tech Spec Limit of 0.6La.Caused by Failure of Handwheel Shaft.Shaft Smoothed W/Emory Cloth ‎ (← links)
  • 05000482/LER-1989-001, :on 890120,discovered That Diesel Generator Not Tested at Least Once Every 7 Days Per Tech Specs.Testing Frequency Reduced to Once Per 31 Days Following 890106 Test. Caused by Personnel Error.Personnel Instructed ‎ (← links)
  • 05000482/LER-1987-034, :on 870820,Door 36171 Found Propped Opened. Caused by Personnel Error.Permanent Signs Posted,Personnel Instructed to Include Precautionary Statements in Work Packages & Mode to Alarm Response Procedure ‎ (← links)
  • 05000482/LER-1997-010-01, Forwards LER 97-010-01 Re Failure to Test All Contacts on Slave Relay in Solid State Protection Sys.Event Is Second Discovery of Surveillance Test Deficiency Found During GL 96-01 Review Program ‎ (← links)
  • 05000482/LER-1997-014, :on 970730,determined That Waste Gas Sys Hydrogen/Oxygen Analyzers Were Not Operated IAW Tech Spec Requirements.Caused by Inadequate Administrative Controls. Revised Applicable Procedures ‎ (← links)
  • 05000482/LER-1993-012, :on 930510,reported Unusual Noise Due to Small Frictional Force Release in RCS During heat-up.Implemented Thermal Expansion Monitoring Program in Refuel Viii to Aid in Identification of Locations of Restraint on RCS ‎ (← links)
  • 05000482/LER-1993-012-01, Forwards LER 93-012-01 Re Noise Event Experienced During heat-up Following Sixth Refueling Outage.Ler Addresses Results of Thermal Expansion Monitoring Program.New Info Noted by Rev Bars ‎ (← links)
  • 05000482/LER-1992-017, :on 920103,inadequate Chemistry Shift Manning Was Determined.Caused by Failure of Qualification Program to Address Requirements of ANS Standard Due to Lack of Awareness of TS Requirements.Review Initiated ‎ (← links)
  • 05000482/LER-1999-014, :on 991024,determined That Plant Entered Mode 4 Following Seventh RFO Without Satisfying TS Sr.Caused by Failure to Identify TS Requirements 3.5.2 & 3.5.3 with Respect to Plant Conditions.Procedures Revised ‎ (← links)
  • 05000482/LER-1999-011, :on 990820,determined That TS Surveillance 4.5.2.h.1(b) Had Not Been Met for CCP Line Flow Rate.Caused by Inadequate Procedure.Licensee Will Revise Procedure STS BG-004 & Will Review Similar Sys Configurations ‎ (← links)
  • 05000482/LER-1999-008, :on 990805,ESFA Due to Closure of D SG FW Regulating Valve Occurred.Caused by Failure of W 7300 Process Control Ncb Group 1 Controller Card.Replaced W 7300 Process Control Ncb Group 1 Controller Card ‎ (← links)
  • 05000482/LER-1986-053, :on 860930,hourly Patrols of One Impairment Not Performed as Required by Tech Spec 3.7.11.Caused by Personnel Error.Fire Impairment Initiated.Rept Incorporated Into Required Reading for Operating Personnel ‎ (← links)
  • 05000482/LER-1986-050, :on 860925,resident Inspector Discovered That Fire Door 15031 Defeated by Piece of Foreign Matl,Violating Tech Spec 3.7.11.Caused by Personnel Neglecting to Ensure Proper Closure of Door.Personnel Counseled ‎ (← links)
  • 05000482/LER-1986-051, :on 860925,spent Fuel Pool Crane Overload Limit Found Improperly Adjusted from 860923-25,while Fuel Moved in & Around Spent Fuel Storage Facility,In Violation of Tech Spec 3.9.7.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1987-021, :on 870516,hourly Fire Watch,Per Tech Spec 3.7.11,performed Late.Caused by Personnel Error.Signoff Will Be Added at End of Each Fire Watch Impairment Log to Ensure Verification by Fire Watch Personnel ‎ (← links)
  • 05000482/LER-1986-063, :on 861114,control Room Ventilation Isolation Signal Initiated.Caused by Chlorine Monitor Spurious Spike. Monitor Placed in Bypass for Troubleshooting & Returned to Svc on 861118 ‎ (← links)
  • 05000482/LER-1986-044, :on 860902,partial Loss of Offsite Power Occurred.Caused by Personnel Error During Routine Substation Switchyard Maint Activity.Increase in Testing Frequency of Valve Ef HV-38 Implemented ‎ (← links)
  • 05000482/LER-1986-062, :on 861103,unplanned Control Room Ventilation Isolation Signal Initiated.Caused by Removal of Instrument Power to Control Room Air Intake Chlorine Monitor Gk AITS-2 During Work Activity.Procedure Revised ‎ (← links)
  • 05000482/LER-1987-019, :on 870506,containment Purge Isolation Signal & Control Room Ventilation Isolation Signal Received.Caused by Equipment Failure Resulting Fron Numerous Removals & Reconnections of Connector.Connector Replaced ‎ (← links)
  • 05000482/LER-1986-061, :on 861031,motor Circuit Breaker for Centrifugal Charging Pump a Racked Down,While Charging Pump B Out of Svc.Caused by Personnel Error.Oversight Discussed W/Involved Personnel ‎ (← links)
  • 05000482/LER-1986-060, :on 861025,effluent Sample Flow to Unit Vent Sys Particulate & Iodine Sampler Gt RE-21A Isolated.Caused by Inadequate Calibr Procedure.Procedure Revised to Preclude Recurrence ‎ (← links)
  • 05000482/LER-1987-017, :on 870419,reactor Trips Occurred During Reduction Required by Tech Spec 3.1.3.1.Caused by Rod Control Sys Logic Cabinet Card Failures.Degraded Cards Supplied by Westinghouse Replaced ‎ (← links)
  • 05000482/LER-1986-059, :on 861019,containment Atmosphere Radiation Monitors Placed in Bypass for Filter Replacement While Purge Valves Open,In Violation of Tech Spec 3.3.3.1.Caused by Personnel Error.Personnel Instructed ‎ (← links)
  • 05000482/LER-1987-018, :on 870419,auxiliary Feedwater Actuation Signal & Steam Generator Blowdown & Sample Isolation Signal Occurred After Block Switch Placed in Permit Position. Caused by Personnel Error.Procedure Changed ‎ (← links)
  • 05000482/LER-1986-002, :on 860118,control Room Ventilation Isolation Occurred Due to Chlorine Monitor Signaling High Chlorine Level in Outside Air Makeup.Caused by Breakage of Chemically Sensitive Paper Tape.Tape Replaced ‎ (← links)
  • 05000482/LER-1987-016, :on 870409,continuous Fire Watch Not Maintained in ESF Switchgear Room 2 Per Tech Spec 3.7.10.3.a.Caused by Failure to Properly Instruct Fire Watch Personnel.Supervisor & Individual Involved Reprimanded ‎ (← links)
  • 05000482/LER-1986-057, :on 861013,during Performance of Surveillance Testing,Inadvertent ESF Actuation Occurred.Caused by Personnel Error.Rept Will Be Incorporated Into Required Reading for Operating Personnel ‎ (← links)
  • 05000482/LER-1986-058, :on 861015,hourly Fire Watch of Area Containing Inoperable Fire Barrier Penetration Missed.Caused by Personnel Error.Event Discussed in Training Sessions for Fire Watch Personnel ‎ (← links)
  • 05000482/LER-1986-056, :on 861010,discovered That Improper Method Used for Verifying Boron Dilution Alarm Setpoint of Source Range Nuclear Instrumentation.Caused by Error in Vendor Manual. Proper Voltage Settings Incorporated in Manual ‎ (← links)
  • 05000482/LER-1986-039, :on 860801,hourly Fire Watch Patrol Delayed Due to Inoperable Fire Door,Contrary to Tech Spec 3.7.11. Caused by Personnel Error & Improper Reassembly of Door. Doors Will Be Posted ‎ (← links)
  • 05000482/LER-1987-008, :on 870208,control Room Ventilation Isolation Signal Initiated.Caused by Spurious Spike on Control Room Air Intake Chlorine Monitor Gk AITS-3.No Root Cause Identified.Design Change Being Considered ‎ (← links)
  • 05000482/LER-1986-070, :on 861222,auxiliary Feedwater Pumps Started Due to Main Turbine & Feedwater Pump Trip.Caused by Personnel Removing Circuit Card While Bringing Main Turbine Up to Rated Speed.Sys Will Be Reviewed ‎ (← links)
  • 05000482/LER-1986-071, :on 861225,two Control Room Ventilation Isolation Signals Occurred Due to Monitor GK-AITS-2 Indicating High Chlorine Level.Caused by Circuit Bulb Failure.Bulb Replaced.Monitor Returned to Svc ‎ (← links)
  • 05000482/LER-1987-007, :on 870122,while NSSS Computer Maint Being Performed,Axial Flux Difference Annunciator Began Alarming Spuriously.Caused by Cognitive Personnel Error.Rept Added to Required Reading as Reminder to Personnel ‎ (← links)
  • 05000482/LER-1997-017, :on 970930,spent Fuel Storage Facility Crane Surveillances Were Not Met.Caused by Inadequate Procedural Guidance.Spent Fuel Bridge Crane Declared Inoperable Until Procedure Revised ‎ (← links)
  • 05000482/LER-1999-010, :on 990817,failure to Perform TS Surveillance 4.3.3.6 Was Noted.Caused by Inadequate Procedure Revision. Corrected Performance of Sp STS ML-001 & Revised Procedures STS ML-001 & STS CR-001 ‎ (← links)
  • 05000482/LER-1999-006-01, Forwards LER 99-006-01,re Identification of Failure to Enter LCO for TS 3.6.1.1 While Taking Containment Atmosphere Samples During Power Operation.Commitments Made by Util Are Encl ‎ (← links)
  • 05000482/LER-1999-009, :on 990811,discovered That Inadequate Fire Separation Could Result in Loss of Charging Water Capability.Caused by Several Unvalidated Engineering Judgements Re Safe Shutdown Equipment.Revised Procedures ‎ (← links)
  • 05000482/LER-1986-038, :on 860630,lo-lo Condenser Level Signal Occurred,Initiating Trip of Condensate Pumps & Main Feedwater Pump Turbines.Caused by Personnel Error.Plant Mod Request Developed ‎ (← links)
  • 05000482/LER-1986-064, :on 861113,while Core Alterations in Progress, Containment Isolation Valve Manually Stroked Open to Allow Setting of Open Limit Switches on Valve Actuator.Caused by Personnel Error.Valve Closed on 861114 ‎ (← links)
  • 05000482/LER-1987-004, :on 870120,while at 100% Power,Reactor Trip Occurred.Caused by Turbine Vibration.Turbine High Vibration Trip Circuitry Modified to Provide Alarm Rather than Trip Function.Evaluation Continuing ‎ (← links)
  • 05000482/LER-1987-005, :on 870117,ESF Actuations Occurred During Turbine Testing.Caused by High Vibrations Which Required Rapid Reduction in Speed of Main Turbine.Precaution Added to Sys Procedure ‎ (← links)
  • 05000482/LER-1997-001-03, Forwards Suppl to LER 97-001-03,providing Addl Example of Surveillance Performed,But Not at Correct Frequency. Editorial Changes Made to Attachment 1 & 2 of LER for Completeness of Info ‎ (← links)
  • 05000482/LER-1987-002, :on 870108,low Steamline Pressure Signal Occurred During Calibr Testing & ESF Actuation Initiated. Caused by Personnel Error.Improved Instrument Identification Tags & Procedural Enhancements Made ‎ (← links)
  • 05000482/LER-1986-046, :on 860904,control Room Ventilation Isolation Signal Initiated Due to Typo in Keyboard Command When Returning Process Radiation Monitor to Svc.Caused by Personnel Error.Rept Added to Required Reading ‎ (← links)
  • 05000482/LER-1986-017, :on 860407,four Covered Floor Openings in Auxiliary Bldg Did Not Satisfy Fire Rating Requirement Specified in Fire Hazards Analysis of Fsar.Caused by Inadequate Design.Fireproofing Underway ‎ (← links)
  • 05000482/LER-1997-013, :on 970721,TS Section 3.7.3 Violation Re Two Independent CCW Loops Occurred.Caused by Failure of Personnel to Assure That Adequate Procedures Were in Place. Procedures Reviewed ‎ (← links)
  • 05000482/LER-1996-001-01, Forwards LER 96-001-01 Concerning Esfa & 10CFR50.73(a)(2)(i)(B) for Violation of TS ‎ (← links)
  • 05000482/LER-1986-012, :on 860228,ESF Actuation Resulted in Starting of Auxiliary Feedwater Pump BA-P & Addition of Auxiliary Feedwater Flow to Steam Generators.Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000482/LER-1986-009, :on 860224,control Room Ventilation Isolation Signal Initiated Due to Loss of Sample Flow in Intake Radiation Monitors GK-RE-04 & GK-RE-05.Cause Unknown. Evaluation Continuing.Monitors Returned to Svc ‎ (← links)
  • 05000482/LER-1987-003, :on 870109,reactor Trip Signal & Main Feedwater Isolation Signal Occurred When Turbine Impulse Pressure Channel Placed in Test & Only Two Reactor Coolant Pumps Run. Caused by Omission of Caution in Procedure ‎ (← links)
  • 05000482/LER-1987-014, :on 870325,monthly Surveillance Procedure on Auxiliary Feedwater Sys Not Performed within Time Required by Tech Spec.Caused by Personnel Error.Check for Past Due Surveillance Procedure Required Weekly ‎ (← links)
  • 05000482/LER-1987-009, :on 870212,control Room Positive Pressure Test Failed to Meet Tech Spec Acceptance Criteria.Caused by Seal Leakage on Door 36092.Door Seal Reworked & Positive Pressure Test Performed Satisfactorily ‎ (← links)
  • 05000482/LER-1987-006, :on 870203,fire Damper GKD050 Failed to Close During Testing.Caused by Improper Installation of Flexible Conduit.Design Change of Conduit Installation Implemented ‎ (← links)
  • 05000482/LER-1986-069, :on 861222,main Turbine Trip & Feedwater Isolation Occurred Due to Steam Generator hi-hi Level, Followed by Reactor Trip Due to Steam Generator lo-lo Level. Caused by Equipment Failure.Equipment Replaced ‎ (← links)
  • 05000482/LER-1986-068, :on 861220,steam Generator D Water Level Reached lo-lo Setpoint,Initiating Stated Events,Including Reactor Trip & Main Feedwater Isolation.Caused by Steam Generator Level Sensitivity ‎ (← links)
  • 05000482/LER-1986-066, :on 861213,water Level in Safety Injection Sys Accumulators C & D Dropped Below Min Level Given in Tech Spec.Caused by Excessive Check Valve back-leakage.Corrective Actions Being Evaluated ‎ (← links)
  • 05000482/LER-1986-035, :on 860619,ESF Actuation Occurred.Caused by Personnel Inadvertently Grounding Two Limit Switch Contacts During Maint.Training Session Held W/Maint Craftsmen & Procedure Revised ‎ (← links)
  • 05000482/LER-1999-001, :on 990128,surveillance Was Missed Because Valve Was Not Considered within Scope of Surveillance Cause Indeterminate Due to Time Frame in Which Event Occurred. Locked Open of Valve EGV-0105 & Revised Procedures ‎ (← links)
  • 05000482/LER-1999-001-01, Forwards LER 99-001-01,re Identification of Missed SRs Required by TS 4.7.3a.Commitments Made by Util Are Encl ‎ (← links)
  • 05000482/LER-1986-065, :on 861205,control Room Ventilation Isolation Occurred.Caused by Chlorine Monitor Signaling High Chlorine Level in Outside Air Makeup to Ventilation Sys.Root Cause Undetermined.Design Change Being Considered ‎ (← links)
  • 05000482/LER-1986-067, :on 861124,discovered Fire Damper Verification Not Performed as Required by Tech Spec Surveillance Requirement 4.7.10.3.b.Caused by Personnel Error.Fire Watches Established Until Completion of Tests ‎ (← links)
  • 05000482/LER-1986-033, :on 860612,verification of Fuel Oil Properties Not Performed within 30 Days of Obtaining Fuel Oil Samples. Sys for Processing Lab Repts Improved ‎ (← links)
  • 05000482/LER-1986-034, :on 860604,discovered That Handwheel Lock on Containment Isolation Valve Lf FV-96 Improperly Lockwired, Causing Valve to Be Inoperable.Caused by Personnel Error. Rept Incorporated Into Required Reading ‎ (← links)
  • 05000482/LER-1986-030, :on 860604,feedwater Isolation Signal Initiated on High Water Level in Steam Generator C,Closing Feedwater Isolation Valves & Tripping Main Feedwater Pump B.Caused by Leakage in Main Feedwater Control Valves ‎ (← links)
  • 05000482/LER-1999-004, :on 990412,personnel Discovered That Direct Flow Path Had Been Created Between Containment Bldg Atmosphere & Auxiliary Bldg During Fuel Movement.Caused by Series of Personnel Errors.Operations Mgt Assigned ‎ (← links)
  • 05000482/LER-1986-041, :on 860723,control Room Ventilation Isolation Signal (Crvis) Occurred.Caused by Short Supply of Tape in Chlorine Monitor.Design Change to Minimize Potential Spurious Crvis Currently Being Considered ‎ (← links)
  • 05000482/LER-1986-042, :on 860724,during Controlled Plant Shutdown, Reactor Trip Occurred.Caused by lo-lo Steam Generator B Level.Evaluation of Feedwater Flow Control Design Enhancements Continuing ‎ (← links)
  • 05000482/LER-1986-028, :on 860420 & 22,RHR Placed in Configuration So That Low Pressure Injection Flow Path Into Only 2 of 4 RCS Cold Legs Existed.Caused by Personnel Error.Procedure Being Developed to Maintain RHR Temps ‎ (← links)
  • 05000482/LER-1999-003, :on 990409,source Range Instrumentation Was Not Tested Prior to Entering Mode 6.Caused by Inadequate Training.Coached & Trained Personnel ‎ (← links)
  • 05000482/LER-1987-012, :on 870309 & 13,control Room Ventilation Isolation Signals Occurred When Chlorine Monitor Sensed False High Level in Outside Air Makeup.Caused by Spurious Spikes.Monitor Design Change Being Considered ‎ (← links)
  • 05000482/LER-1987-013, :on 870311,determined Four Fire Dampers Never Cycled Per Tech Spec 4.7.10.3.b.Caused by Cognitive Personnel Error.Design Change Initiated.Fire Dampers Cycled Properly on 870312 ‎ (← links)
  • 05000482/LER-1986-029, :on 860522 & 29,discovered That Sealed Sources Not Tested within 6-month Interval & During Detector Installation on 860422.Caused by Personnel Error.Program for Notification Established ‎ (← links)
  • 05000482/LER-1988-020, :on 881018,during Performance of Channel Calibr Surveillance Test,Containment Atmosphere Radiation Monitor Lost Sample Flow.Caused by Personnel Error & Clogged Filter. Subj Added to on Job Qualification Guideline ‎ (← links)
  • 05000482/LER-1988-019, :on 881012,containment Purge Isolation Signal & Control Room Ventilation Isolation Signal Received from Radiation Monitor Gt RE-32.Caused by Intermittent Failure of Connection Between Module & Socket ‎ (← links)
  • 05000482/LER-1988-022, :on 881022,control Room Ventilation Isolation Signal Occurred Due to Chlorine Monitor Indicating High Chlorine Level in Outside Air Makeup to HVAC Sys.Caused by Loss of Power to Monitor Due to Blown Fuse ‎ (← links)
  • 05000482/LER-1988-018, :on 881011,fuel Bldg Ventilation Isolation Signal & Control Room Ventilation Isolation Signal Received from Fuel Bldg Exhaust Radiation Monitor.Caused by Failed Radiation Monitor Signal Cable ‎ (← links)
  • 05000482/LER-1986-022, :on 860413,control Room Ventilation Isolation Signal Occurred.Caused by Loss of 120-volt Ac Instrument Bus NN04 Due to Blown Fuse.Bus Repowered from Normal Power Supply & Fuse Replaced ‎ (← links)
  • 05000482/LER-1985-004, :on 850319,following Initial Fuel Loading, Hourly Fire Watch Patrols for One Room in Auxiliary Bldg & One Room in Control Bldg Missed.Patrols Reestablished.W/ ‎ (← links)
  • 05000482/LER-1985-005, :on 850311,one roll-up Fire Door in Auxiliary Bldg Not Verified Closed Every 7 Days.Caused by Revised Surveillance Procedure Approved on 850226.Procedure Change Initiated & Issued on 850411 ‎ (← links)
  • 05000482/LER-1988-017, :on 880915,determined That Four Strontium Sources Not Leak Tested Between 860113 to 871212 & Three Cesium Sources Not Tested Between 850703 to 860606.Caused by Personnel Error.Sources Added to Procedures ‎ (← links)
  • 05000482/LER-1998-004-01, Forwards LER 98-004-01 Re Condition That Resulted in Nuclear Power Plant Being in Condition,Outside Design Basis of Plant.Attachment to Ltr Identifies Actions Committed to by Util in Encl LER ‎ (← links)
  • 05000482/LER-1987-011, :on 870218 & 0317,analysis of Operating Data of Cycles I & II Determined That Reactor Core Thermal Power Exceeded 3,411 MW by Less than 1.0%.Caused by Personnel Error.Transmitters Recalibr ‎ (← links)
  • 05000482/LER-1986-019, :on 860409,unit Shut Down Due to Radioactive Leakage of RCS Pressurizer Spray Bypass Valve (Yarway Corp, 5515B) Above Tech Spec Permissible Rate.No Cause Stated. Valve Repaired ‎ (← links)
  • 05000482/LER-1986-048, :on 860912,violation of Tech Spec 3.7.10.3 Re Halon Sys Occurred.Caused by Cognitive Personnel Error. Std Work Instructions Applicable to Halon Storage Tanks Revised ‎ (← links)
  • 05000482/LER-1986-047, :on 860904,waste Gas Decay Tank 8 Found Slowly Decreasing in Pressure During Planned Release from Tank 2. Caused by Leak Into Tank 2 Via Drain Connections W/Common Header.Drain Valve Repaired ‎ (← links)
  • 05000482/LER-1986-015, :on 860326,control Room Ventilation Isolation Signal Occurred as Result of Chlorine Monitor GK-AITS-3 Signal.Caused by Blown Fuse in Monitor Due to Punched Power Lead in Sample Pump.Pump & Fuse Replaced ‎ (← links)
  • 05000482/LER-1986-040, :on 860702,control Room Ventilation Isolation Signal Occurred During Operational Testing on Control Room Air Intake Radiation Monitor Gk RE-05.Caused by Personnel Error.Test Procedures Being Revised ‎ (← links)
  • 05000482/LER-1986-037, :on 860701,hi-hi Water Level Condition in Steam Generator B Initiated Main Turbine Trip.Caused by Sensitivity of Steam Generator Level Indication to Small Changes in Feedwater Flow ‎ (← links)
  • 05000482/LER-1986-020, :on 860410,ESF Actuation Occurred Following Simultaneous Spike of Steam Generator Level Indicator Channels.Caused by Ref Leg Flashing During Cooldown in Preparation for Maint.Procedures Enhanced ‎ (← links)
  • 05000482/LER-1986-016, :on 860327,control Room Ventilation Isolation, Containment Purge Isolation & Fuel Bldg Isolation Signals Occurred.Caused by 15-volt Power Supply Malfunction.Root Cause Under Investigation ‎ (← links)
  • 05000482/LER-1986-036, :on 860626,loss of Offsite Power to ESF Emergency Bus NB01 Occurred When Disconnect on Breaker 69-16 Fell Open.Caused by Misalignment & Improper Latching of Disconnect Switch.Switch Properly Aligned ‎ (← links)
  • 05000482/LER-1997-015-01, Forwards LER 97-015-01 Which Documents That Violation of TSs Occurred Re Required ISI VT-3 Exams of Pressurizer Safety Valves,Per 10CFR50.73(a)(2)(i)(B) ‎ (← links)
  • 05000482/LER-1998-010, :on 981207,installation of Snubber with Defective Part Resulted in Violation of TS 3.7.8.Caused by Failure to Maintain Appropriate Tracking of Defective Part & Communication.Procedure Revised ‎ (← links)
  • 05000482/LER-1986-014, :on 850731 & 860313,hourly Patrols of Fire Dampers Not Performed,Violating Tech Spec 3.7.11.Caused by Personnel Error.Patrols Reestablished & Rept Added to Reading List ‎ (← links)
  • 05000482/LER-1986-013, :on 860314,containment Depressurization Initiated W/Containment Atmosphere Radiation Monitor in Bypass Position,Violating Tech Specs 3.3.2 & 3.3.3.1.Caused by Personnel Error.Rept Added to Reading List ‎ (← links)
  • 05000482/LER-1998-009, :on 981231,maint Activity Rendered Atmospheric Relief Valves Inoperable Locally.Caused by Human Error. Evaluated Maint & Post Maint Testing Process ‎ (← links)
  • 05000482/LER-1986-032, :on 860609,violation of Tech Spec 3.6.3, Requiring Demonstration of Containment Isolation Valve Operability,Discovered.Caused by Personnel Error.Cycling Tests Completed ‎ (← links)
  • 05000482/LER-1986-026, :on 860609,containment Visual Insp Per Tech Spec 3.5.2 & One Containment Air Lock Seal Demonstration Per Tech Spec 3.6.1.3 Inadvertently Omitted.Caused by Inadequate Status Chart.Chart Revised ‎ (← links)
  • 05000482/LER-1986-073, :on 860102,leak Rate Testing of Containment H Purge Sys Was Not Performed IAW All Requirements of TS 3.6.1.7.Cause Identified as Mindset.Revised Procedure & SAR Changes ‎ (← links)
  • 05000482/LER-1986-073-01, Forwards LER 86-073-01,re Event in Which Wolf Creek TSs Were Not Met.Commitments Made by Util,Encl ‎ (← links)
  • 05000482/LER-1997-016-02, Forwards LER 97-016-02,correcting Discrepancy Between Abstract & Additional CA Sections of LER 97-016-01,dtd 971219 Re Completion Date for Planned Fire Protection Organization Structure & Program Ownership self-assessment ‎ (← links)
  • 05000482/LER-1986-027, :on 860524,Tech Spec 3.7.11 Found Violated Due to Missed Hourly Fire Watch Patrol Between 2 & 3 Am in Auxiliary Bldg.Caused by Cognitive Personnel Error by Fire Watch Individual.Personnel Reinstructed ‎ (← links)
  • 05000482/LER-1997-019, :on 971014,failure to Comply W/Ts SR 4.5.2b.1 for Venting of ECCS Pump Casings & Accessible Discharge Piping High Points Discovered.Caused by Personnel Error. Procedure STS BG-002 Revised ‎ (← links)
  • 05000482/LER-1997-025, :on 971218,failure to Meet Breaker Historical TS Frequency Testing Noted.Caused by Inadequate Procedure. Revised Breaker Testing Procedure to Correct Testing Frequency Discrepancy ‎ (← links)
  • 05000482/LER-1997-016-01, Forwards LER 97-016-01,documenting Violation of Plant OL & TS Re Use of Fire Protection Sys Pumps for non-fire Protection Purposes ‎ (← links)
  • 05000482/LER-1986-023, :on 860419,control Room Intake Chlorine Monitors Left in Bypass Over 1 H W/O Initiation of Control Room Emergency Ventilation Sys in Recirculation Mode.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1985-068, :on 850913,series of Changes to Fire Watch Patrol Log Initiated Which Ultimately Resulted in Failure to Patrol Area of Auxiliary Bldg from 850921-28.Caused by Personnel Error.Patrol Resumed ‎ (← links)
  • 05000482/LER-1997-024, :on 971129,ESFs & RPS Actuations Occurred Due to Spike on ex-core Neutron Monitoring Sys Nuclear Instrument NI-35 Intermediate Range Channel.Investigated Causes & Stabilized Plant ‎ (← links)
  • 05000482/LER-1997-023, :on 971124,failure to Maintain Both Containment Personnel Hatch Air Lock Doors Closed Was Noted.Caused by Inadequate Communications Due to Insufficient Detail in Procedures.Closed Door & Revised Procedures ‎ (← links)
  • 05000482/LER-1997-021, :on 971119,inadequate Ssps Surveillance Testing Was Noted.Caused by Inadequate Original Test Design Supplied by Vendor.Performed Complete Review of Ssps for Similar Memory Configurations of Unique Logic Circuit Design ‎ (← links)
  • 05000482/LER-1997-022, :on 971121,TT Instrumentation Surveillance Testing Was Not Performed Prior to Startup.Caused by Historical Mindset of Personnel Involved in Development of Procedures.New Procedure,Sts AC-003 Was Written ‎ (← links)
  • 05000482/LER-1986-021, :on 860410,containment Purge & Control Room Ventilation Isolation Signal Occurred While Installing Monitoring Equipment.Caused by Low Impedance & Blown Fuse. Procedure Revised ‎ (← links)
  • 05000482/LER-1986-018, :on 860408,reactor & Turbine Trip,Main Feedwater Isolation,Auxiliary Feedwater Actuation & Steam Generator Blowdown & Sample Isolation Occurred.Caused by Personnel Error During Switchyard Calibr ‎ (← links)
  • 05000482/LER-1997-005, :on 970411,violation of TS 3.8.1.1 B EDG Operability Was Identified.Caused by Human Error.Performance Improvement Request Initiated to Document Event ‎ (← links)
  • 05000482/LER-1997-026, :on 971109,heavy Loads Moved in Containment Outside of Heavy Load Analysis Requirements.Caused by Procedural Inadequacy.Revised Controlling Procedure ‎ (← links)
  • 05000482/LER-1997-026-01, Forwards LER 97-026-01,to Reflect Change in Date of Commitment Re Procedure Rev Which Is Necessary Prior to Next Outage.Date Was Changed to Reflect Completion Prior to Commencement of Outage ‎ (← links)
  • 05000482/LER-1998-007, :on 981029,securing ESF Switchgear Room Cooler During Normal Operations Resulted in TS Violation.Caused by Misinterpretation of Engineering Disposition & Design Basis Requirements.Deleted & Current TS Will Be Reviewed ‎ (← links)
  • 05000482/LER-1998-006, :on 960119,failure to Correctly Test Portion of Automatic Level Control Circuitry of EDG Fuel Oil Transfer Sys Was Noted.Caused by Failure to Ensure well-constructed License Amend Was Submitted.Revised Procedures & Forms ‎ (← links)
  • 05000482/LER-1999-007, :on 990519,action Statement 19 of TS 3.3.2 Was Violated.Caused by Inadequate Work Practices.Revised Procedure & Discussed Expectations with Maint & Operations Personnel ‎ (← links)
  • 05000482/LER-1999-005, :on 990512,ESFA Was Noted Due to Loss of Number 7 Transformer.Caused by Intrusion of Raccoon in Switchyard. No Equipment Damage Was Found & Breaker Was Reset ‎ (← links)
  • 05000482/LER-1997-027, :on 971122,missed Surveillance Was Noted.Caused by Improper Circuitry Configuration & Inadequate Procedure. Revised Procedure STS RP-004 & Work Groups Will Discuss PIR 99-1777 ‎ (← links)
  • 05000482/LER-1997-020-02, Forwards LER 97-020-02,re Failure to Meet Snubber TS LCO Requirements of 10CFR50.73(a)(2)(i)(B).Supplement Provides Info on Root Cause & Corrective Actions.Revised Commitment Made in Ltr,Encl ‎ (← links)
  • 05000482/LER-1986-024, :on 860420,feedwater Isolation Signal & Main Turbine Trip Signal Initiated by hi-hi Water Level Condition in Steam Generator D.Caused by Personnel Error.Ler Incorporated Into Required Reading ‎ (← links)
  • 05000482/LER-2020-001-01, Plant Shutdown Due to Inoperable Containment Purge Isolation Valves ‎ (← links)
  • 05000482/LER-1988-007, :on 880513,determined That Surveillance Test Procedure for Analog Channel Operation Test of Process Instrumentation Not in Compliance W/Tech Spec 2.2.1,Action Statement A.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1986-025, :on 860422,both Trains of Safety Injection Flow to RCS Cold Legs Disabled by Closure of Valve EM HV-8835. Caused by Personnel Failing to Recognize Plant Condition. Retraining on ECCS Manipulations Planned ‎ (← links)
  • 05000482/LER-1998-005, :on 981011,potential Compromise of Safeguards Matl Occurred Because of Unlocked Safeguards Cabinet.Caused by Lack of Guidance for Proper Locking of Padlocks.Security Shift Lieutenant Immediately Notified ‎ (← links)
  • 05000482/LER-1988-015, :on 880825,ESF Actuation Occurred.Caused by Loose Connections in Containment Atmosphere Radiation Monitor.Connections Tightened & Monitor Returned to Svc. Connections on Remaining Monitors Inspected ‎ (← links)
  • 05000482/LER-1988-016, :on 870922,essential Svc Water Sys Train a Declared Inoperable.On 870928,Tech Spec Action Statement Entered When Air Conditioning Unit Repair Took Longer than Allowed.Caused by Tech Spec Misinterpretation ‎ (← links)
  • 05000482/LER-1985-075, :on 850106,main Steam Line Isolation Valve W/ Cracked Piston Slide Discovered in Hydraulic 4-way Valve.On 850607 & 11,two Addl Valves Failed.Following Replacement, Addl Valves Failed.Caused by Flaw in Mfg ‎ (← links)
  • 05000482/LER-1986-004-01, :on 860211,hourly Fire Watch Patrol of Three Areas Containing Inoperable Fire Barriers Not Initiated. Caused by Personnel Error.Hourly Fire Watch Patrol Established.Personnel Trained ‎ (← links)
  • 05000482/LER-1988-004, :on 880414,determined That Daily Channel Check on loose-part Detection Sys Not Performed.Caused by Deletion of Requirement to Audibly Monitor Each Channel.Temporary Change Incorporated Into Procedure ‎ (← links)
  • 05000482/LER-1988-014, :on 880821,ESFAS Auxiliary Feedwater Pump Low Suction Pressure Instrumentation Channel Check Procedure Found Not to Meet Tech Spec 4.3.2.1 Requirements.Caused by Contractor & Personnel Error.Procedure Changed ‎ (← links)
  • 05000482/LER-1988-006, :on 880422,control Room Ventilation Isolation Signal Ocurred.Caused by Spurious Spike of Chlorine Monitor. Signs Placed in Area Preventing Radio Transmission ‎ (← links)
  • 05000482/LER-1986-003, :on 860122,discovered That Required Surveillance on Particulate & Iodine Monitoring Skid Sampler Flow Rate Monitors Not Performed.Caused by Personnel Error. Procedures Revised ‎ (← links)
  • 05000482/LER-1988-013, :on 880802,control Room Ventilation Isolation Signal Occurred Due to Chlorine Monitor.Caused by Paper Tape Bunching Up on Chlorine Monitor.Paper Tape Replaced & No Further Problems Identified W/Monitor ‎ (← links)
  • 05000482/LER-1988-012, :on 880728,control Room Ventilation Isolation Signal Occurred.Caused by Failed Photocell Resulting in Low Signal Output Condition.Photocell Assembly Replaced.W/ ‎ (← links)
  • 05000482/LER-1988-011, :on 880701,ESF Actuation Control Room Ventilation Isolation Signal Occurred.Caused by Broken Sensitive Paper Tape.Paper Tape Replaced & Monitor Returned to Operation ‎ (← links)
  • 05000482/LER-1985-081, :on 851126,1209,10 & 13,control Room Ventilation Isolations Occurred Due to Chlorine Monitor Signaling High Levels in Outside Air to Control Bldg Ventilation Sys.Caused by Broken Tape ‎ (← links)
  • 05000482/LER-1988-010, :on 880628,control Room Ventilation Isolation Signal Occurred Due to Indication of High Chlorine Level in Outside Air Makeup to Control Bldg HVAC Sys.Caused by Failed Air Sample Pump.Sample Pump Replaced ‎ (← links)
  • 05000482/LER-1988-005, :on 880326,control Room Ventilation Isolation Signals Occurred.Caused by Spurious Spike on Chlorine Monitor.Monitor Replaced & Taken to Instrumentation & Control Shop for Further Troubleshooting ‎ (← links)
  • 05000482/LER-1988-009, :on 880615,discovered That Special Rept Re Removal of Vent Sys Noble Gas Monitor on 880601 Not Submitted.Caused by Personnel Error & Less than Adequate Training on Monitor.Training Increased ‎ (← links)
  • 05000482/LER-1988-008, :on 880616,control Room Ventilation Isolation Signal Occurred.Caused by Broken Chemically Sensitive Paper Tape Used to Detect Chlorine.Paper Tape Replaced ‎ (← links)
  • 05000482/LER-1988-002, :on 880124,ESF Actuation Occurred Due to Probable Transient in Power Supply for Radiation Monitor. Cause Unknown.No Corrective Actions Planned ‎ (← links)
  • 05000482/LER-1997-001-01, :on 970624,failed to Comply with Surveillance Requirements to Test Certain Components at Shutdown.Caused by Personnel Error.Expectations Re Compliance with TS Were Discussed & Reinforced ‎ (← links)
  • 05000482/LER-1988-001, :on 880120,fuel Bldg & Control Room Ventilation Isolation Signals Received When Gas Detector Signal Spiked High on Fuel Bldg Exhaust Radiation Monitor GG-RE-27.Cause Undetermined.No Problems Found W/Monitor ‎ (← links)
  • 05000482/LER-1987-051, :on 871226,two Main Feedwater Isolations & Auxiliary Feedwater Actuation Occurred.Caused by Procedural Deficiency.Procedure for Testing MSIVs Enhanced to Reduce Effects of Swell Due to Pressure Differential ‎ (← links)
  • 05000482/LER-1987-058, :on 871223,violation of Facility Tech Specs Occurred & Detector Cables for Containment High Range Radiation Monitors Not Installed W/Equipment Qualification Requirements.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1987-059, :on 871223,determined That Auxiliary Bldg Filtration Unit Room B Door Found Unacceptable for 3 H Fire Rated Barrier.Caused by Door Improperly Ul Labelled as 3 H Fire Protection.Fire Watches Established ‎ (← links)
  • 05000482/LER-1987-060, :on 871222,P-4 Turbine Trip on Reactor Trip Function Not Incorporated Into Surveillance Testing Program & Not Tested.Caused by Personnel Error.Sts IC-215 Revised on 871224 to Include Surveillance Testing ‎ (← links)
  • 05000482/LER-1987-057, :on 871221,Tech Spec Violation Occurred Due to Failure to Fully Understand Requirements for Fire Watch. Caused by Personnel Error.Fire Protection Employee Retrained & Procedure Revised ‎ (← links)
  • 05000482/LER-1988-003, :on 880215,control Room Ventilation Isolation Signal Occurred.Caused by Chlorine Monitor Indicating High Chlorine Level.Control Bldg HVAC Sys Secured & Returned to Normal ‎ (← links)
  • 05000482/LER-1986-005, :on 860218,hourly Fire Watch Patrol of Area Containing Inoperable Fire Barrier Not Performed.Caused by Personnel Error.Method of Preparing Fire Watch Impairment Log Sheets Revised ‎ (← links)
  • 05000482/LER-1986-010, :on 860214,hourly Rather than Continuous Fire Watch Established for Inoperable Spray/Sprinkler Sys.Caused by Personnel Error.Individual Counseled & Info Will Be Incorporated Into Required Reading ‎ (← links)
  • 05000482/LER-1986-004, :on 860213,discovered That Hourly Fire Watches Not Established on 860211,following Removal of Fireproofing Matl from Auxiliary Bldg.Caused by Personnel Error. Supervisor Assigned to Oversee Removal of Matl ‎ (← links)
  • 05000482/LER-1997-012, :on 970605,section 6.2.2 TS Violation Re Shift Compliment Was Noted.Caused by Lack of Administrative Controls to Ensure SCBA Corrective Lenses Were Available for Licensed Operators.Purchased Corrective Lenses ‎ (← links)
  • 05000482/LER-1997-011, :on 970525,TS Violation Occurred During Calorimetric Adjustments.Caused by Personnel Error.Revised Procedure to Concur with TS & Counseled Individuals Involved ‎ (← links)
  • 05000482/LER-1997-006, :on 970414,identified Failure to Comply W/Requirements for Instrument Accuracy Due to Personnel Error,In That Procedure Control Should Have Caused Update of Documents.Procedure STS IC-890B Was Revised ‎ (← links)
  • 05000482/LER-1997-008, :on 970520,manual Reactor Trip Occurred,Due to Steam Leak in non-safety Related Third Stage Extraction Steam Isolation Valve.Caused by Lack of Guidance.Engineering Disposition to EER Will Be Revised by 970620 ‎ (← links)
  • 05000482/LER-1986-008, :on 860224,auxiliary Feedwater Actuation Signal (Afas) & Steam Generator Blowdown & Sample Isolation Occurred.Caused by Operator Error.Procedure Revised Re Actions to Unblock Afas Signal ‎ (← links)
  • 05000482/LER-1986-007, :on 860222,reactor Main Turbine Feedwater Isolation,Steam Generator Blowdown & Sample Isolation Trips Occurred Due to Steam Generator lo-lo Water Level.Caused by Circuitry Failure.Card Replaced ‎ (← links)
  • 05000482/LER-1985-086, :on 851220,discovered That Required Fire Dampers Not Installed in Ventilation Penetrations Through 3-h Fire Walls in Auxiliary Bldg.Caused by Design Oversight. Design Change to Require Fire Dampers Prepared ‎ (← links)
  • 05000482/LER-1985-071, :on 851009,control Room Ventilation Isolation Signal Initiated Due to Radiation Monitor in Control Bldg HVAC Sensing Low Voltage Condition.Caused by Lightning Strike.Low Voltage Condition Cleared ‎ (← links)
  • 05000482/LER-1985-072, :on 851010,high Water Level in Steam Generator C Initiated Main Turbine Trip & Main Feedwater Pump Turbine Trip.Caused by Personnel Error in Allowing Insufficient Time for Steam Generator Level to Stabilize ‎ (← links)
  • 05000482/LER-1985-069, :on 851007,turbine Trip,Feedwater Isolation, Steam Generator Blowdown,Sample Isolation & Auxiliary Feedwater Actuation Occurred.Caused by Manual Initiation of Reactor Trip Following Power Reduction ‎ (← links)
  • 05000482/LER-1985-073, :on 850911,violation of Tech Spec 3.3.3.8 Discovered When Five Transmitters/Receivers Associated W/ Control Room Fire Alarm Control Panel Found Disabled.Caused by Operator Error ‎ (← links)
  • 05000482/LER-1985-080, :on 851119,violation of Tech Spec 3.7.10.1 Was Discovered Due to Failure to Periodically Check Valve Position in Fire Suppression Water Sys.Caused by Personnel Oversight.Procedures Revised ‎ (← links)
  • 05000482/LER-1985-074, :on 851016,unusual Indications Noted in Radiological Control Access Area.Caused by Personnel Error & Improper Identification of Specific Actions to Reduce Pressure Before Placing Purge Sys in Operation ‎ (← links)
  • 05000482/LER-1996-010, :on 961009,failure of MOV to Fully Close Occurred Due to Inadequate pre-tensioning of Torque Switch Contact Finger.Valve Actuator Was Repaired,Training Was Provided & Program Requirements Revised ‎ (← links)
  • 05000482/LER-1985-077, :on 851031,hourly Fire Watches Not Initiated as Required When Fire Barrier Encl Around Auxiliary Feedwater Alternate Supply Valve Removed for Surveillance Testing. Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1985-076, :on 851031,inadvertent Start of Turbine Driven Auxiliary Feedwater Pump Occurred Due to ESF Actuation. Caused by Cognizant Personnel Failure to Identify & Block Actuation Signal.Personnel Counseled ‎ (← links)
  • 05000482/LER-1986-001, :on 860104,control Room Ventilation Isolation Signal (Crvis) Actuated Due to High Chlorine Level in Outside Air Makeup.Caused by Loss of Power to Chlorine Monitor.Sample Pump Replaced ‎ (← links)
  • 05000482/LER-1985-053, :on 850717,during Surveillance Test Procedure, Control Room Ventilation Isolation Signal Initiated.Caused by Faulty Bypass Switch.Equipment Returned to Normal & Switch Replaced ‎ (← links)
  • 05000482/LER-1985-084, :on 851210,during Routine Update of Surveillance Data Base,Violation of Tech Spec 4.0.2b Re Allowable Time Intervals Discovered.Caused by Logic Error in Computer Program.Program Corrected ‎ (← links)
  • 05000482/LER-1985-070, :on 850813,hourly Containment Temp Readings Not Recorded for Approx 8 H Due to Containment Zone Fire Detector Failure.Caused by Procedural Personnel Error. Readings Resumed Immediately ‎ (← links)
  • 05000482/LER-1985-082, :on 851202,casing Failure on Potential Transformer Caused Loss of Offsite Power to ESF Transformer XNB01.Caused by Failure of Metering & Relay Potential Transformer Monitoring.Sys Restored ‎ (← links)
  • 05000482/LER-1997-004, :on 970206,failed to Accurately Perform Containment Integrated Lrt.Caused by Incorrect start-up Procedure.Revised Applicable Procedures & Performed Required Lrt ‎ (← links)
  • 05000482/LER-1985-079, :on 851204,unit Operated Under Provisions of Tech Spec 3.0.3.Caused by Failure to Reduce power-range High Neutron Flux Setpoints within Required Time Frame.Provision to Allow Change in Setpoints Being Considered ‎ (← links)
  • 05000482/LER-1996-007, :on 960723,failed to Perform Required post-mod Test.Caused by Personnel Error.Performed Required post-mod Test on 960723 & Revised Procedures AP 05-001,AP 05-002 & AP 05-005 ‎ (← links)
  • 05000482/LER-1996-004, :on 960323,violation of TS 3.5.4 Occurred. Caused by Personnel Error.Clearance Order 95-0510-EM Was Revised to Address Tagging Feeder Breakers de-energized for Four SI Pump Discharge Valves ‎ (← links)
  • 05000482/LER-1996-005, :on 960314,TS 3.9.4 Violation Occurred Due to Personnel Error.Counseled Involved Personnel,Informed Operation Personnel of Misinterpretation & Revised Affected Procedures ‎ (← links)
  • 05000482/LER-1996-018, :on 961105,identified That ESF Response Time Testing Was Not Being Adequately Accomplished for TDAFW Pump.Caused by Mgt Standards Not Being Met.Revised Surveillance Procedure STS AL-104 ‎ (← links)
  • 05000482/LER-1985-055, :on 850806,control Room Ventilation Isolation Initiated Due to Radiation Monitor Alarm Signaling High Radiation Levels.Caused by lightning-induced Fluctuation to Radiation Monitor Supply.Investigation Begun ‎ (← links)
  • 05000482/LER-1985-060, :on 850807,reactor Trip & Feedwater Isolation Initiated Along W/Auxiliary Feedwater Actuations & Steam Generator Blowdown & Sample Isolation.Turbine Trip Caused by Moisture Separator Reheater Control Problem ‎ (← links)
  • 05000482/LER-1985-049, :on 850709,ESF Actuation & Reactor Trip Occurred Due to lo-lo Water Level in Steam Generator C. Caused by Loss of Feedwater Flow Due to Installation & Removal of Test Equipment.Personnel Counseled ‎ (← links)
  • 05000482/LER-1996-017, :on 961029,licensee Failed to Comply W/Ts SR 4.3.3.5.2.Caused by Lack of Knowledge of Function of Isolation Switch.Actuated Components Using ASP Isolation Switches Were Functionally Tested ‎ (← links)
  • 05000482/LER-1997-003, :on 970128,lost High Security Key to Vital Area Doors Due to Inadequate Administrative Control Security Keys.Changed Lock Core for All Vital Area Doors ‎ (← links)
  • 05000482/LER-1997-002, :on 970124,discovered Potential Compromise of Safeguards Info Due to Unlocked Cabinet.Caused by Personnel Error.Security Was Immediately Notified ‎ (← links)
  • 05000482/LER-1996-013, :on 961022,determined TS Clarification (TSC) 005-94 Inappropriate to Circumstances.Cause Currently Under Investigation.Tsc 005-94 Deleted & Removed from Control Room ‎ (← links)
  • 05000482/LER-1996-016, :on 961023,determined TS Clarification (TSC) 016-86 Inappropriate to Circumstances.Cause Currently Under Investigation.Tsc 016-86 Deleted & Required Reading Established Re Event ‎ (← links)
  • 05000482/LER-1996-014, :on 961018,licensee Failed to Comply W/Ts 4.5.2.c for Visual Insp of Containment.Cause Is Under Investigation.Tsc 010-85 Was Deleted & Removed from Cr ‎ (← links)
  • 05000482/LER-1996-015, :on 961023,failure to Comply with TS 3.6.1.1, Containment Integrity Occurred.Cause Under Investigation. TSC 033-85 Was Deleted & Removed from CR on 961112 ‎ (← links)
  • 05000482/LER-1985-058, :on 850731,reactor Tripped & ESF Actuation, Feedwater Isolation & Steam Generator Blowdown & Sample Isolation Occurred.Caused by Electrical Spike on Channel of Power Range Nuclear Instrumentation ‎ (← links)
  • 05000482/LER-1985-059, :on 850802,Tech Spec Violation Occurred When Two Rooms in Auxiliary Bldg Not Inspected for Evidence of Fire.Caused by Personnel Error.Personnel Instructed & Fire Watch Reestablished ‎ (← links)
  • 05000482/LER-1996-011, :on 961016,determined That TS Clarification (TSC) 009-05 Was Inappropiate to Circumstances.Cause Indeterminate.Deleted & Removed TSC 009-05 from Control Room Required Reading ‎ (← links)
  • 05000482/LER-1996-012, :on 961018,determined That TS Clarification (TSC) 004-86 Was Inappropiate to Circumstances.Cause Indeterminate.Deleted & Removed TSC 004-86 from Control Room Required Reading ‎ (← links)
  • 05000482/LER-1985-056, :on 850728,control Room Ventilation Isolation Occurred Due to High Chlorine Signal from Chlorine Monitor. Caused by Discoloration on chlorine-sensitive Paper Tape. Tape Replaced & Monitor Recalibr ‎ (← links)
  • 05000482/LER-1985-054, :on 850723,reactor & Main Turbine Trip, Auxiliary Feedwater Actuation,Feedwater Isolation & Steam Generator Blowdown & Sample Isolation Occurred.Caused by Wire Failure ‎ (← links)
  • 05000482/LER-1988-028-01, :on 881209,individual Received Skin Dose in Excess of Limits.Caused by Unexpected Hot Particle Contamination.Review of Hot Particle Contamination Control Program Performed to Address Concerns ‎ (← links)
  • 05000482/LER-1985-052, :on 850712,control Room Ventilation Isolation Signal Initiated Due to Alarm on Control Room HVAC Chlorine Monitor.Caused by Broken Filter Paper Tape.Tape Replaced ‎ (← links)
  • 05000482/LER-1985-051, :on 850720,standby Emergency Diesel Generator a Inadvertently Started,Causing ESF Actuation.Caused by Technician Bumping Start Relay for Generator.Technician Admonished to Exercise Caution ‎ (← links)
  • 05000482/LER-1996-011-01, Forwards LER 96-011-01,96-012-01,96-013-01,96-014-01, 96-015-01 & 96-016-01 ‎ (← links)
  • 05000482/LER-1985-050, :on 850710,hi-hi Water Level in Steam Generator Initiated Feedwater Isolation,Main Turbine Trip & Feedwater Pump Trip.Caused by Excessive Leakage Through Feedwater Control Valve.Valve Connections Adjusted ‎ (← links)
  • 05000482/LER-1985-067, :on 850923,reactor Trip,Turbine Trip,Steam Generator Blowdown & Sample Isolation,Feedwater Isolation & Auxiliary Feedwater Actuation Occurred.Caused by Failed Controller Card.Card Replaced ‎ (← links)
  • 05000482/LER-1996-020, :on 961015,failure to Comply with TS Action Statement 3.6.1.7.a Occurred.Caused by Misalignment Between Organizational Culture & Regulatory Environ.Surveillance Procedure STS PE-015 Was Revised ‎ (← links)
  • 05000482/LER-1985-057-01, :on 850712,three Control Bldg Dampers Failed to Close Following Unplanned ESF Actuation.Caused by Hardware/ Software Mismatch & Faulty Switch.Switch Replaced & Hardware/Software Mod Underway ‎ (← links)
  • 05000482/LER-1985-061, :on 850914 & 1003,control Room Ventilation Isolation Occurred Due to Chlorine Monitor Signaling High Levels Outside Air Makeup to Sys.Caused by Paper Tape Breakage.Parts in Paper Tape Drive Replaced ‎ (← links)
  • 05000482/LER-1985-042, :on 850705 & 11,ESF Actuation Occurred Resulting in Feedwater Isolation,Main Turbine Trip & Main Feedwater Pump Trips.Caused by High Water Levels in Steam Generator & Overlap Between Setpoints ‎ (← links)
  • 05000482/LER-1985-040, :on Seven Occasions Between 850702 & 12,ESF Actuation Initiated Control Room Intake Radiation Monitor Spurious Alarm.Caused by Mismatch Between Software & Hardware in Microprocessing Unit ‎ (← links)
  • 05000482/LER-1993-006-01, :on 930402,hot Particle Picked Up During Filling & Venting of SI Sys Resulted in Exposure Exceeding 10CFR 20.101 Requirements.Operations Qualification Card Checklist Procedures Will Be Revised ‎ (← links)
  • 05000482/LER-1996-009, :on 960822,failed to Perform TS SRs on Staggered Test Basis.Caused by Personnel Error.Corrected Surveillance Testing Frequency in May 1996 ‎ (← links)
  • 05000482/LER-1996-019, :on 961206,historical Failure to Comply W/ Radiological Effluent TS Requirement Identified.Caused by Technical Error in Interpretation of TS Provisions.Forms Apf 02-007-06,07 & 08 Have Been Changed ‎ (← links)
  • 05000482/LER-1985-045, :on 850623,reactor Trip Occurred During Performance of Surveillance Test STS IC-211A.Caused by Inadvertent Breaker Trip Due to Confusing Procedural Steps. Procedure Revised ‎ (← links)
  • 05000482/LER-1985-066, :on 850803,RHR ECCS Degradation Occurred Twice During Surveillance Test.Caused by Inappropriate Procedure Test Method.Procedure Revised to Eliminate Recirculation Line ‎ (← links)
  • 05000482/LER-1985-065, :on 850905,main Turbine Trip Caused Reactor Trip,Feedwater Isolation,Auxiliary Feedwater Actuation,Steam Generator Blowdown & Sample Isolation.Caused by Faulty Control Pump Discharge Relief Valve ‎ (← links)
  • 05000482/LER-1985-048, :on 850628,daily Calorimetric Heat Balance Test & Adjustment of ex-core Nuclear Instrumentation Channel Gains Determined Not Performed from 850615-0623.Caused by Isolated Personnel Oversight ‎ (← links)
  • 05000482/LER-1985-064, :on 850902,reactor Trip,Turbine Trip,Steam Generator Blowdown & Sample Isolation,Feedwater Isolation & Auxiliary Feedwater Actuation Occurred as Result of lo-lo Water Level in Steam Generator 2 ‎ (← links)
  • 05000482/LER-1985-047, :on 850622,hourly Fire Watch Patrol Not Performed in Several Areas of Auxiliary Bldg.Caused by Personnel Error.Individual Dismissed & Hourly Fire Watch Patrols Performed by Permanent Personnel ‎ (← links)
  • 05000482/LER-1996-018-01, :on 961105,failure to Comply with TS Surveillance Requirement 4.3.2.2 Occurred.Caused by Management Did Not Ensure That There Were Proper Mechanisms & Expectations Were Met.Sts AL-104 Was Revised ‎ (← links)
  • 05000482/LER-1985-063, :on 850830,centrifugal Charging Pump a Declared Inoperable.On 850831,manual Isolation Valve on Pump Discharge Line Found Closed,Causing Pipe to Be Inoperable. Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1985-062, :on 850902,control Room Ventilation Isolation Occurred.Caused by Chlorine Monitor Incorrectly Sensing High Chlorine Levels Due to Failure of Lamp in Monitor Analysis Unit.Lamp Replaced ‎ (← links)
  • 05000482/LER-1985-023, :on 850501,reactor Protection Sys Trip Signal & ESFAS Initiated During Startup Test Procedure in Mode 3. Caused by Personnel Error.Plant Testing Temporarily Suspended.Personnel Counseled ‎ (← links)
  • 05000482/LER-1985-022, :on 850430,safety Injection & Main Steam Line Isolation Occurred,Causing ESF Actuation.Unusual Event Declared & Subsequently Canceled.Caused by Interference from Operator Radio.Radio Use Restricted ‎ (← links)
  • 05000482/LER-1985-010, :on 850413,preaction Sprinkler Sys for Redundant Sys or Components Discovered Taken Out of Svc on 850411 W/O Establishing Continuous Fire Watch.Caused by Personnel Error.Event Reviewed W/Personnel ‎ (← links)
  • 05000482/LER-1985-043, :on 850609,feedwater Isolation Signal,Main Turbine Trip & Steam Generator Feed Pump Turbine Trip Signals Occurred Due to hi-hi Water Level in Steam Generator A.Caused by Leak Through Main Control Valves ‎ (← links)
  • 05000482/LER-1985-039, :on 850606,during Test of Steam Dump Control Sys,Reactor Trip & Low Coolant Sys Average Temp Initiated Feedwater Isolation Signal.Caused by lo-lo Steam Generator Water Level.Water Levels Returned to Normal ‎ (← links)
  • 05000482/LER-1985-041, :on 850609 & 13,auxiliary Feedwater Actuation & Steam Generator Blowdown & Sample Isolation Occurred. Caused by Main Feedwater Pump a Trips ‎ (← links)
  • 05000482/LER-1985-025, :on 850501,two Main Steam Line Isolation Valves Declared Inoperable.Caused by Hydraulic Oil Pump Malfunction.Oil Pumps Replaced & Valves Tested ‎ (← links)
  • 05000482/LER-1985-026, :on 850506,ESFAS Signal Initiated When Two Radiation Monitors Deenergized Due to Inadvertent Loss of Power to safety-related 480-volt Ac Load Ctr.Caused by Personnel Error.Sys Restored to Normal ‎ (← links)
  • 05000482/LER-1985-024, :on 850501,ESFAS Signal Initiated When Steam Generator a Level Indication Spiked Low,Resulting in Initiation of Feedwater Isolation Signal & Auxiliary Feedwater Actuation Signal ‎ (← links)
  • 05000482/LER-1985-037, :on 850602,spurious Electronic Spike in Control Room Intake Radiation Monitor (GK-RE-04) Occurred. Caused by Mismatch Between Software & Hardware in Microprocessing Unit RM-80 ‎ (← links)
  • 05000482/LER-1985-019, :on 850426,auxiliary Feedwater Actuation Signal Occurred.Caused by Operator Placing Switch FC-HS-25 in Permit Position.Switch Returned to Block Position.Error Discussed W/Operating Personnel ‎ (← links)
  • 05000482/LER-1985-017, :on 850424,Ruskin Mfg Co Fire Dampers Found in Violation of Tech Specs Since Issuance of OL on 850311. Caused by Insufficient Clearance Between Damper Frames & Penetration Sleeves.Fire Watches Established ‎ (← links)
  • 05000482/LER-1985-021, :on 850428,ESF Actuation Occurred.Caused by Anticipatory Trip Generated by rate-sensitive Steam Generator Circuiting Due to Personnel Error.Setpoint Actuation Will Be Stressed During Training ‎ (← links)
  • 05000482/LER-1985-014, :on 850421,ESFAS Initiated When Control Room Chlorine Monitor Ran Out of Paper,Causing Ventilation Isolation Signal.Caused by Personnel Error.Schedule for Changing Paper Increased to Twice Weekly ‎ (← links)
  • 05000482/LER-1985-038, :on 850604,auxiliary Feedwater Actuation Signal & Steam Generator Blowdown & Sample Isolation Signal Initiated.Caused by Auxiliary Boiler Trip.Pumps Secured ‎ (← links)
  • 05000482/LER-1985-044, :on 850614,feedwater Isolation,Auxiliary Feedwater Actuation,Steam Generator Blowdown & Sample Isolation Occurred.Caused by Higher than Actual Indication of Reactor Power Level ‎ (← links)
  • 05000482/LER-1985-036-01, :on 850531,ESF Actuation Signal Initiated When Steam Generator Level Bistable Tripped in Error During Maint Activity.Caused by Technician Pressing Trip Button on Wrong Bistable Logic Card.Personnel Counseled ‎ (← links)
  • 05000482/LER-1985-036, :on 850531,when Steam Generator Level Bistable Tripped in Error During Maint,Esfas Initiated.All ESF Equipment Responded Properly.No Equipment Damage or Release of Radioactivity Noted ‎ (← links)
  • 05000482/LER-1985-031, :on 850611,ESF Actuation Signal Initiated Due to hi-hi Water Level in Steam Generator C,Initiating Feedwater Isolation,Main Turbine Trip & Main Feedwater Pump Trip Signals ‎ (← links)
  • 05000482/LER-1985-012, :on 850419,inadvertent Train B Safety Injection Occurred.Caused by Loose Limit Switch Tug in Valve Motor Operator.Switch Lug Repaired ‎ (← links)
  • 05000482/LER-1985-033, :on 850523,manual Control Room Ventilation Isolation Signal Initiated.Caused by Electronic Spike from Control Room Chlorine Monitor Displaying Erratic Behavior. Potential Equipment Mod Under Evaluation ‎ (← links)
  • 05000482/LER-1985-011, :on 850412,control Room Ventilation Isolation Signal Occurred.Caused by Spurious Spike on Chlorine Monitor GK-AITS-2.Monitor Placed in Bypass & Later Returned to Svc ‎ (← links)
  • 05000482/LER-1985-032, :on 850521,containment Purge & Control Room Ventilation Isolation Signals Initiated.Caused by Inadvertent Repositioning of ESFAS Cabinet Test Switch While Performing Test Procedure STS IC-230 ‎ (← links)
  • 05000482/LER-1985-034, :on 850524,containment Water Level Instrument LF-LI-09 Found in out-of-svc Condition.Caused by Obstruction on Slide Pole Resulting from Insulation Activity.Obstruction Removed & Instrument Returned to Svc ‎ (← links)
  • 05000482/LER-1985-030, :on 850518,ESFAS & Feedwater Isolation Occurred When Steam Generator Level Transmitter Sensed Erroneous High Level Condition.Caused by Pressure Perturbation in Common Sensing Line ‎ (← links)
  • 05000482/LER-1985-028, :on 850516,auxiliary Feedwater Actuation Signal Initiated When Steam Generator D Decreased Below lo-lo Actuation Setpoint.Caused by Personnel Error.Personnel Counseled & Required to Read LER ‎ (← links)
  • 05000482/LER-1985-027, :on 850506,ESF Actuation Occurred,Resulting in Safety Injection & Main Steam Line Isolation Due to Low Steam Line Pressure Signal on Steam Generator A.Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000482/LER-1985-029, :on 850506,containment Purge Isolation Control Room Ventilation Isolation & Fuel Bldg Ventilation Isolation Signals Occurred During Recovery from Safety Injection. Caused by Procedural Deficiency ‎ (← links)
  • 05000482/LER-1985-013, :on 850506,15,23,26 & 30,ESF Actuation Signal Initiated by Control Room Intake Radiation Monitor Spurious Alarm,Causing Control Room Ventilation Isolation Signal. Caused by Mismatch in Microprocessing Unit ‎ (← links)
  • 05000482/LER-1985-010-01, :on 850411,preaction Sprinkler Sys for Area Containing Redundant Sys Taken Out of Svc W/O Establishing Required Continuous Fire Watch.Situation Discovered on 850413.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1985-020, :on 850429,ESF Actuation Signal Initiated When Steam Generator C Water Level Increased to High Level Setpoint.Caused by Personnel Error.Event Considered Isolated Case.Shift Supervisor & Personnel Counseled ‎ (← links)
  • 05000482/LER-1992-016, :on 921110,generator Trip/Turbine Trip Occurred When Ground Fault Was Initiated Due to Personnel Error. Addl Training Provided to All Pertinent Personnel Emphasizing Utils Commitment ‎ (← links)
  • 05000482/LER-1992-014, :on 920817,discovered That Two Containment Isolation Valves Not Verified in Locked Closed Position from 920123-0215.Caused by Operator Error.Surveillance Procedure Re Valve Listing Revised ‎ (← links)
  • 05000482/LER-1985-009, :on 850412,ESF Actuation Signal Initiated When Several Radiation Monitors Deenergized.Caused by Ground Fault Indication Tripping Power Supply Breaker.Breaker Reset & Power Restored ‎ (← links)
  • 05000482/LER-1996-008, :on 960516,declared Essential Service Water Room Ventilation Inoperable.Caused by Inadequate Procedure. Revised Stn IC-465 & Counseled Personnel ‎ (← links)
  • 05000482/LER-1985-006, 00:on 850407,ESF Actuation Resulted Due to Inadvertent Actuation of Fuel Bldg Ventilation & Control Room Ventilation Isolation Signals.Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000482/LER-1985-008, :on 850409,ESF Actuation Signal Initiated While Resetting Flow on Containment Purge Gaseous Activity Monitor.Caused by Faulty Vacuum Transducer.Transducer Replaced ‎ (← links)
  • 05000482/LER-1985-007, :on 850408,control Room Ventilation Isolation Signal Occurred During Surveillance Procedure in Mode 5. Caused by Personnel Error.Control Room HVAC Monitor Bypassed.Personnel Counseled ‎ (← links)
  • 05000482/LER-1992-015, :on 921007,discovered That ESW & EDG Declared Inoperable During Testing.Caused by Cognitive Personnel Error.Individuals Involved Will Prepare Presentation Stressing Compliance W/Ts ‎ (← links)
  • 05000482/LER-1985-002, :on 850313,control Room Air Intake Radiation Element in Bypass for Greater than 1 H W/O Isolating Emergency Ventilation Sys.Caused by Personnel Error. Personnel Counseled ‎ (← links)
  • 05000482/LER-1985-001, :on 850313,16 & 19,containment Purge Isolation & Control Room Ventilation Isolation Signals Actuated During Initial Fuel Loading.Caused by Faulty Relay in Radiation Monitor.Relay Replaced ‎ (← links)
  • 05000482/LER-1985-003, :on 850314,ESF Signal Initiated.Caused by Operator Deenergizing Control Room Radiation Monitor.Error Reviewed by Shift Supervisor & Personnel ‎ (← links)
  • 05000482/LER-1996-006, :on 960606,reactor Trip Occurred.Caused by Inadequate Design Mod Procedures.Installed Correct Pins in Three of Four Main Feedwater Regulating Valves,Placed Holds on Stored Equipment & Revised Procedures ‎ (← links)
  • 05000482/LER-1992-011, :on 920626,discovered That Testing Frequency for EDG B Had Not Been Increased to at Least Once Per Seven Days,Per Tss.Caused by Personnel Error.Procedure Adm 01-0244 EDG Reliability... Will Be Revised ‎ (← links)
  • 05000482/LER-1992-013, :on 920814,determined That Sp for Trip Actuating Device Operational Test Manual Reactor Trip Did Not Properly Test Rtb Actuation Function.Caused by Personnel Error.Sp Revised to Include Trip Blocking ‎ (← links)
  • 05000482/LER-1992-006, On 920228,binding & Slippage Between Reactor Coolant Sys Crossover Leg Saddles & Thrust Block Caused Unusual Noise.Shims on Generator Crossover Legs Removed & Reworked ‎ (← links)
  • 05000482/LER-1996-003, :on 960720,failed to Maintain Containment Closure.Caused by Insufficient Work Package Guidance. Closure Verified & Work Package Modified ‎ (← links)
  • 05000482/LER-1992-002, :on 920219,after Failure of Gating/Sequencing Card in Inverter Supplying 120 Volt Ac safety-related Bus, Reactor Trip Occurred in SG A.Cause Undetermined.Review of Procedure Ofn 00-021 Conducted ‎ (← links)
  • 05000482/LER-1996-002, :on 960130,lost a Train ESW Due to Icing on Trash Racks.Contingency Plans Developed to Be Implemented Whenever Lake Temp Drops to 40F or Lower & Air Bubblers Being Maintained in Outer Bays to Sweep Frazil Ice ‎ (← links)
  • 05000482/LER-1995-003, :on 950719,failed to Implement Proper Isolation & Separation of Temporary Cables.Caused by Insufficient Personnel Awareness of Isolation & Seperation Requirements. Qualified Reviewer Procedure Program Developed ‎ (← links)
  • 05000482/LER-1992-012, :on 920707,discovered That Sp to Demonstrate Operability of Containment Personnel Airlock & Containment Emergency Escape Airlock Not Performed by 920526 & 0321, Respectively.Caused by Computer Error ‎ (← links)
  • 05000482/LER-1995-007, :on 951229,ESW Supply Fan B Failed to Start Due to Low Control Voltage.Caused by Extensive Run of Control Wiring.Sys Configuration Modified to Installed Jumpers.W/ ‎ (← links)
  • 05000482/LER-1992-010, :on 920508,informed That Instrument Channel Associated W/Pressure Transmitter ALPT38 Never in Tripped Condition.Caused by Inadequate Procedural Guidance. Procedure Revised & Personnel Trained ‎ (← links)
  • 05000482/LER-1995-006, :on 951110,loss of Emergency Bus NB02 Experienced Due to Degraded Gasket on Mo Cabinet.Caused by Personnel Error.Gasket Replaced & Power Removed from All Air Break Disconnect Mos ‎ (← links)
  • 05000482/LER-1992-008, :on 920328,discovered That 30-minute Monitoring & Logging of Indicated Axial Flux Difference for Excore Channel Not Performed Per Tech Specs.Caused by Inadequate Procedure.Procedures Revised ‎ (← links)
  • 05000482/LER-1992-009, :on 920417,failure of Humidity Sensors Resulted in Inoperability of Both Trains of Crevs.Caused by Normal Wear of Sensors.Sensors Will Be Replaced Every 36 Months & Procedure Inc L-1000 Conducted Every 18 Months ‎ (← links)
  • 05000482/LER-1991-024, :on 911028,discovered That Incorrect Spring Packs Installed in Actuators for Spray Additive Tank Outlet. Team Initiated to Examine All Safety Related MOV Testing Programs.Mgt Action Plan Also Initiated ‎ (← links)
  • 05000482/LER-1991-026, :on 911212,CR Ventilation Isolation Received When Key for RM Gk RE-004 Was Not Placed Fully in Bypass Position.Discussion of LER Will Be Included in Licensed Operator Requalification Training by 920430 ‎ (← links)
  • 05000482/LER-1995-005, :on 950907,failed to Develop Adequate Fire Protection Program Emergency Lighting.Caused by Personnel Error Re Failure to Identify Addl Emergency Lighting Requirements.Issued Memo to Shift Supervisors ‎ (← links)
  • 05000482/LER-2020-001, Shutdown Due to Inoperable Containment Purge Isolation Valves ‎ (← links)
  • 05000482/LER-1992-001, :on 920113,failure to Follow Procedures Could Have Caused Both Intermediate Range Channels to Be Inoperable During Physics Testing.Caused by Temp Procedure Changes.Procedure Revised ‎ (← links)
  • 05000482/LER-1995-004, :on 950727,lube Oil Keepwarm Pump for Emergency DG a Failed.Caused by Plant Inability to Obtain ASME Section Iii,Class 3,replacement Pump or Parts.Failed Pump Replaced ‎ (← links)
  • 05000482/LER-1991-002-01, :on 911112,Tech Spec 4.8.1.1.2 Could Not Be Satisfied for Emergency Diesel Generator B.Caused by Only Load Description & Not Numercial Value of Load Put Into Surveillance Procedures.Change to TS Submitted ‎ (← links)
  • 05000482/LER-1992-005, :on 920227,notified That Containment Penetration Vent & Drain Valves May Not Have Been Included in Surveillance Test Procedure STS GP-007 Due to Inadequate Attention to Detail.Subj Procedure Revised ‎ (← links)
  • 05000482/LER-1992-004, :on 920229,ESF Actuations Involving Lifting of Lead to Logic Circuit Card Occurred.Caused by Inadequate Procedural Development.Procedures Revised to Direct Control Room Operators to Hold Reset Switch ‎ (← links)
  • 05000482/LER-1992-003, :on 920213,failure to Maintain Proper CR Evs Resulted When Train a Operated in Lieu of Train B.Caused by Inattention to Detail.Standing Order for CR Operators & Sys Operating Procedure to Be Revised ‎ (← links)
  • 05000482/LER-1989-021, :on 911227,discovered That TS Surveillance Test Procedure STS BM-202 Had Not Been Performed Satisfactorily on 891115 Due to Procedural Inadequacy. Administrative Procedure Adm 02-300 Revised ‎ (← links)
  • 05000482/LER-1991-021, :on 911021,emergency Diesel Generator a Restored W/Incorrect post-welding Hydrostatic Test Pressure on Jacket Water & Lube Oil Hx.Caused by Personnel Error. Procedure Adm 08-217 Will Be Enhanced ‎ (← links)
  • 05000482/LER-1987-061, :on on 870312,motor to Emergency Diesel Generator Ventilation Supply Fan Removed,Rendering Fan Inoperable.On 880717 & 900428,air Damper Clamped in Nonsafeguards Position.Caused by Personnel Error ‎ (← links)
  • 05000482/LER-1991-019, :on 911011,broken Fuel Rod Discovered in Fuel Assembly F31 Located in Core Position L-9 During Fuel off-loading Operations.Caused by grid-to-rod Fretting.New Core Loading Design Pattern Developed ‎ (← links)
  • 05000482/LER-1991-015, :on 910907 & 09,discovered That Dirty, Temporary Filter in Place on Intake to RHR Pump Room & Air Flow for Room Coolers Could Not Be Obtained.Caused by Procedural Inadequacy.Workers Counseled ‎ (← links)
  • 05000482/LER-1991-014, :on 910905,potential Failure of Main Steam Isolation Valves to Fully Close Under All Conditions Discovered.Caused by Incorrect Accumulator pre-charge Curve. Correct pre-charge Curve Being Developed ‎ (← links)
  • 05000482/LER-1990-027, :on 910730,discovered That STS ML-001 Had Not Been Performed within Required Time Frame During Refueling Iv.Caused by Lack of Administrative Controls.Data Base Review Conducted ‎ (← links)
  • 05000482/LER-1995-002, :on 950509,determined That Containment Penetration Breaker NG02BAR131 Not Tested Per TS Requirements Due to Omission of Breaker from Surveillance Tp.Surveillance Tp STS MT-024 Revised ‎ (← links)
  • 05000482/LER-1991-010, :on 910509,containment Emergency Escape Air Lock Hatch Closed W/O Having Required Leak Rate Test Performed Due to Inadequate Administrative Controls.Required Leak Rate Test Performed Satisfactorily ‎ (← links)
  • 05000482/LER-1991-011, :on on 910718,determined That Quarterly CCW Inservice Valve Test Not Completely Performed on 910514. Caused by Status Sheet Incorrectly Initialed to Signify Test Completed.Individual Counseled ‎ (← links)
  • 05000482/LER-1991-013, :on 910821,inoperability of Certain Safety Related Equipment Occurred Due to Potential of Fault in non-safety Related Circuit Propragating.Cause Unknown.Addl Insp of Conduit & Cable Performed ‎ (← links)
  • 05000482/LER-1991-012, :from 910730-31,4 H Comparison of Control Rod Demand Position to Digital Position Indication Not Performed.Caused by Personnel Overlooking Four Failed Pulse Counter Cards on 910718.Personnel Counseled ‎ (← links)
  • 05000482/LER-1991-008, :on 910528,ESF Actuations Occurred When Radiation Monitor Erroneously Restored to Svc,Resulting in Containment Purge Isolation Signal.Caused by Operator Error.Ltr Issued to Operations Personnel ‎ (← links)
  • 05000482/LER-1994-013, :on 940917,personnel Error Resulted in Unanticipated Loss of Reactor Coolant Level.Manager Briefed All Operating Crews on Event ‎ (← links)
  • 05000482/LER-1991-018, :on 911002,containment Purge Isolation & Control Room Ventilation Isolation Signals Generated by Signals from Gaseous Channels of Radiation Monitors.Caused by High Gaseous Activity.Operators Counseled ‎ (← links)
  • 05000482/LER-1991-016, :on 910910,discovered That Five Control Bldg HVAC Sys Ductwork Damper Insp Covers Not Reinstalled Since Maint Activities on 910909.Caused by Inadequate Work Controls.Instructions Will Be Reviewed ‎ (← links)
  • 05000482/LER-1991-009, :on 910613,discovered That Surveillance Testing for Main Steam Loop 1 Low Point Drain Valve Not Performed at Required Frequency.Caused by Personnel Error.Clearance Order Procedure Revised ‎ (← links)
  • 05000482/LER-1991-006, :on 910512,auxiliary Feedwater Actuation & Control Room Ventilation Isolation Occurred When Power Supply in ESF Actuation Sys Failed.Caused by Faulty 15 Volt Power Supply.Power Supply Replaced ‎ (← links)
  • 05000482/LER-1994-012, :on 940925,failure to Correctly Calibr Refueling Machine Load Monitor Occurred.Caused by Inadequate Procedure Controlling Calibr,Setup & Checkout of Refuel Machine Load Monitor.Procedure Revised ‎ (← links)
  • 05000482/LER-1994-010, :on 940916,Source Range Instrument (SRI) SE N-31 Declared Inoperable Due to High Noise Disturbances from Design Deficiencies in Cable Connectors.Sris SE N-31 & SE N-32 Replaced ‎ (← links)
  • 05000482/LER-1994-009, :on 940918,determined That Positive Reactivity Insertion Occurred W/O Operable Boron Injection Flow Path. Caused by EDG a Being Inoperable Due to Loose Switch.Loose Switch Replaced ‎ (← links)
  • 05000482/LER-1994-007, :on 940124,surveillance Test Procedure STS KJ-005A Incorrectly Marked Step 5.2.10.2 as Not Applicable. Caused by Cognitive Personnel Error.Revised Procedures STS KJ-005A & STS KJ-005B ‎ (← links)
  • 05000482/LER-1994-006, :on 940615,Limitorque Actuators on MOVs in ESW Lines to & from Component Cooling Water HXs Changed Out in Both Safety Trains.Caused by Inadequate Job Scoping. Performance Improvement Request Initiated ‎ (← links)
  • 05000482/LER-1991-001, :on 910101,unplanned Release of Waste Gas Decay Tank W/O Prior Sampling Occurred Due to Leak in Rupture Disk.Caused by Misalignment Between Faces of Flange.Disc Replaced Annually as Directed by Vendor ‎ (← links)
  • 05000482/LER-1994-003, :on 940331,discovered Unqualified Shift Technical Advisor Assigned on Shift Crew Due to Inadequate Review of Programmatic Requirements.Shift Engineers Removed Until Required Training Completed ‎ (← links)
  • 05000482/LER-1991-005, :on 910208,setpoint for Containment Base Slab Triaxial Response Spectrum Recorder Incorrectly Set.Caused by Changed Design Specs.Setpoint Change Request Approved & Surveillance Test Procedure Revised ‎ (← links)
  • 05000482/LER-1991-003, :on 910201,visual Insp of ASME Code Class 2 Piping Not Performed Per Tech Specs.Caused by Personnel Error.Review of Surveillance Procedures Conducted ‎ (← links)
  • 05000482/LER-1994-005, :on 940608,containment Spray Pump Was Declared Inoperable Due to Thermal Overload.Wcnoc Has Implemented Weekly Program of Manually Initiating Backwash for Each of ESW Pump Discharge Strainers ‎ (← links)
  • 05000482/LER-1994-004, :on 940426,both Trains of Class 1E HVAC Sys Simultaneously Disabled Due to Inadequate Programmatic Controls.Train a of Class 1E HVAC Sys Restored & Train B of Class 1E HVAC Sys Repaired & Restored ‎ (← links)
  • 05000482/LER-1990-022, :on 901004,Tech Spec Violation,Involving Unqualified Individual Assuming Fire Brigade Duties, Occurred ‎ (← links)
  • 05000482/LER-1990-019, :on 900820,Tech Spec Violation Occurred Due to Late Performance of Surveillance of Offsite AC Power Sources.Caused by Personnel Error.Operators Will Be Counseled on Prioritizing Requirements ‎ (← links)
  • 05000482/LER-1994-002, :on 940124,WCGS Entered TS 3.1.3.1 Action Statement (c)(4) Due to Electrical Problem W/Crdm M-12. Caused by Loose Cable Connector for CRDM M-12.Maint Performed on Connector ‎ (← links)
  • 05000482/LER-1994-001, :on 931214,local Indicating Lamp Short Circuited Causing Associated Control Power Fuse to Open & Rendering B Centrifugal Charging Pump Room Cooler Inoperable.Similar Lamps Removed ‎ (← links)
  • 05000482/LER-1990-017, :on 900729,determined That Portion of Contents of Waste Gas Decay Tank 3 Discharged to Radwaste Bldg HVAC, Resulting in Tech Spec Violation.Caused by Procedural Inadequacy.Work Request Initiated ‎ (← links)
  • 05000482/LER-1993-008, :on 930416,flux Doubling Circuit Blocked Due to Personnel Error Re Misunderstanding of Applicability of Ts. Issued Memo & Initiated Change to TS Bases ‎ (← links)
  • 05000482/LER-1993-013, :on 930809,meteorological Tower de-energized for Mods & Declared Inoperable.Caused by Personnel Error. Meteorological Tower Drawing as-builts Established to Reflect Correct Field Wiring Configuration ‎ (← links)
  • 05000482/LER-1993-016, :on 931101,individual W/Lapsed Fire Brigade Qualification Served as Member of Fire Brigade.Caused by Inadequate Verifying Qualifications Process.Verification Program Consolidated Under Fire Program ‎ (← links)
  • 05000482/LER-1993-014, :on 900501,essential Svc Water Low Flow Prior to Refueling Outage Occurred.Cause Unknown.Reportability Determination Process Revised,Rers Logged & Entered Into Tracking Database ‎ (← links)
  • 05000482/LER-1993-015, :on 930317,breech of Containment Noted During Refueling Operations Due to Inadequate Procedural Guidance. Issued Procedure Change Mi 93-1274 ‎ (← links)
  • 05000482/LER-1993-004, :on 930316,discovered That Broken Fuel Rod Segment Protruding Out of Fuel Assembly F67 at Core Position H-6 Due to grid-to-rod Fretting.Detailed Remote Visual Insp Conducted ‎ (← links)
  • 05000482/LER-1992-007-01, :on 920326,hot Particle Picked Up During RCS Shim Restraint Rework Insp Results in Exposure Exceeding 10CFR20.101 Requirements.Hot Particle Control Program & Policies Being Reviewed ‎ (← links)
  • 05000482/LER-1993-011, :on 930518,nuclear Plant Instrumentation Sys Axial Flux Difference Limits Were Not Updated W/Ts Due to Inadequate Review of Colr.Initiated WR & Computer Software Mod Request ‎ (← links)
  • 05000482/LER-1993-009, :on 930504,noted That Supervising Operator Erroneously Instructed RO to Reset Steamline LP SI Signal Rather than Block SI Signal.Caused by Personnel Error. Personnel Have Been Directed to Review Event ‎ (← links)
  • 05000482/LER-1993-010, :on 930508,Mode 3 Entered from Mode 4 W/Both MDAFWPs Rendered Inoperable by Handswitches Being Placed in pull-to-lock.Caused by Failure to Control Work Activity.Mgt Expectations Clarified ‎ (← links)
  • 05000482/LER-1993-007, :on 930413,determined That Surveillance Test Procedure Re RHR Sys Inservice Pump B Test Not Accomplished by 930410.Caused by Lack of Oversight of Surveillance program.Past-due Notice Proceduralized ‎ (← links)
  • 05000482/LER-1990-012, :on 900517,reactor Trip,Main Turbine Trip & Auxiliary Feedwater Actuation Signals Occurred.Caused by Steam Generator C Atmospheric Dump Valve Stuck Open. Converter Positioner Circuitry Replaced ‎ (← links)
  • 05000482/LER-1985-058-01, Corrected LER 85-058-01:on 850731,reactor Trip,Main Turbine Trip,Auxiliary Feedwater Actuation,Feedwater Isolation & Steam Generator Blowdown & Sample Isolation Occurred.Caused by Faulty Power Supply to Channel.Power Replace ‎ (← links)
  • 05000482/LER-1990-013, :on 900519,main Turbine Trip Occurred as Result of hi-hi Moisture Separator Reheater Level.Root Cause Investigation Not Conclusive.Cautions Added to General Operating Procedure Gen 00-004 ‎ (← links)
  • 05000482/LER-1990-010, :on 900516,discovered That Insp Access Door for Motor Driven Auxiliary Feedwater Pump B Room Cooler Had Been Removed.Caused by Personnel Error.Maint Personnel Informed of Necessity of Doors Being in Place ‎ (← links)
  • 05000482/LER-1990-007, :on 900510,feedwater Isolation Signal Occurred Due to Surveillance Test Requiring High Feed Rate.Caused by Feedwater Flow Rate Higher than Steam Flow.Rev to Surveillance Test Procedures Clarified ‎ (← links)
  • 05000482/LER-1990-011, :on 900514,feedwater Isolation Signal & Main Turbine Trip Signal Occurred When Steam Generator B Reached hi-hi Level Setpoint & Generator C Reached lo-lo Setpoint. Caused by Power Oscillations.Procedure Revised ‎ (← links)
  • 05000482/LER-1990-008, :on 900504,fuel Bldg/Control Room Ventilation Isolation Signals Received from Exhaust Radiation Monitor. Caused by Burned Out Lamp & Blown Fuse in Power Supply.Fuse & Lamp Replaced & Monitor Returned to Svc ‎ (← links)
  • 05000482/LER-1990-009, :on 900608,discovered That Circuit Breakers for Accumulator Outlet IV Closed Resulting in Two Inoperable Accumulators.Caused by Personnel Error & Lack of Specific Procedural Direction.Procedure Revised ‎ (← links)
  • 05000482/LER-1990-006, :on 900416,containment Purge Isolation Signal & Control Room Ventilation Isolation Signal Occurred.Caused by Inadequate Procedures to Govern Deenergization of 120- Volt Ac Distribution Ctrs.Procedures Revised ‎ (← links)
  • 05000482/LER-1990-005, :on 900410,control Bldg/Auxiliary Bldg Pressure Boundary Door Found Open W/O Continuous Watch Established. Caused by Inadequate Procedures.Fire Protection Impairment Control Procedure Revised ‎ (← links)
  • 05000482/LER-1990-004, :on 900405,Tech Spec Surveillance Requirement Not Satisfied Because of Personnel Error in Scheduling Surveillance Test.Procedure Adm 02-300 Revised ‎ (← links)
  • 05000482/LER-1990-002, :on 900314,determined That Halon Release in Either ESF Switchgear Room Would Trip Both Class 1E Electrical Equipment Air Conditioning Units.Caused by Lack of Design Criteria.Criteria Revised ‎ (← links)
  • 05000482/LER-1993-005, :on 930322,maint Electrician Skipped Step in Suppl Work Instruction to Replace/Refurbish Actuator for Centrifugal Charging Pumps.Caused by Personnel Error. Electrican Counseled & Will Be Disciplined ‎ (← links)
  • 05000482/LER-1993-004-01, :on 930316,broken Fuel rod,11-12 Inches in Length,Protruded Out of Fuel Assembly F67 at Core Position FH-6.Caused by Grid to Rod Fretting Failures.Util Evaluating Fluid Elastic Instability ‎ (← links)
  • 05000482/LER-1993-002, :on 930310,CPIS & CR Ventilation Isolation Signal Generated by Signal from Containment Purge Radiation Monitor.Caused by Design Misapplication of Target Rock Sovs. Target Rock Valves Will Be Replaced ‎ (← links)
  • 05000482/LER-1993-001, :on 930304,determined That All Time Delays for RCP Undervoltage Trip Function Not Included in Response Time Testing of Reactor Trip Circuit.Caused by Inadequate Westinghouse TS Development Procedures Revised ‎ (← links)
  • 05000482/LER-1990-003, :on 900320,containment Purge Isolation Signal & Control Room Ventilation Isolation Signal Generated After Initiation of Containment Vent.Caused by Localized Accumulation of Gaseous Activity ‎ (← links)
  • 05000482/LER-1990-025, :on 901223,common Min Flow Path Return Line for SI Pumps to RWST Frozen.Caused by Faulty Ambient Temp Switch.Switches Calibr to Insure Heat Trace Circuits & Alarms Activated ‎ (← links)
  • 05000482/LER-1991-002, :on 910128,essential Svc Water Flow to Containment Cooling Units Below TS 4.6.2.3 Requirements of 4,000 Gpm.Caused by Inaccurate Flow Readings Provided by Local Annubars.Surveillance Procedure Revised ‎ (← links)
  • 05000482/LER-1990-024, :on 901129,portion of Contents of Waste Gas Decay Tank 6 Discharged While Maint Performed.Caused by Personnel Error.Shift Supervisor Counseled ‎ (← links)
  • 05000482/LER-1990-020, :on 900827,portable Sump Pump Installed W/Pump Discharge Directed to Storm Drains,Bypassing Turbine Bldg Drain Monitor LE-RE-59.Caused by Lack of Communication Between Involved Groups ‎ (← links)
  • 05000482/LER-1990-026, :on 901123,tech Spec Violation Occurred Re Safety Related Class IE Battery Bank Powered from Spare Battery Charger.Caused by Error in Safety Evaluation for Procedure Mce E051Q-01.Procedure Deleted ‎ (← links)
  • 05000482/LER-1990-001, :on 900206,reactor Tripped as Result of Loop Low Flow Condition Following Trip of Reactor Coolant Pump a, Causing Feedwater Isolation & Auxiliary Feedwater Actuation Signals.Caused by High Differential Current ‎ (← links)
  • 05000482/LER-1989-020, :on 891117,determined That as-built Configuration of Housing for Both Trains of Containment Cooling Fan HXs Not Seismically Qualified to Withstand Sse. Addl Seismic Restraints Installed ‎ (← links)
  • 05000482/LER-1987-056, :on 871215,one 400 Uci Sr-90/Y-90 Source Could Not Be Located.Caused by Inadequate Control of Licensed matl.Fan-Shaped Apparatuses Removed from Svc to Prevent Recurrence ‎ (← links)
  • 05000482/LER-1989-019, :on 890919,determined That No Procedural Problem Existed & Equipment Problem Caused 890915 Test Deficiency.Caused by Reaching Incorrect Conclusion.Train Restored to Svc After Replacement of Relay ‎ (← links)
  • 05000482/LER-2019-002, Emergency Diesel Generator Inoperable Due to Temperature Control Valve Failure ‎ (← links)
  • 05000482/LER-2024-002-01, Technical Specification Required Shutdown Due to Inoperable Auxiliary Feedwater Discharge Valve ‎ (← links)
  • 05000482/LER-2019-001, Re Valid Actuation of One of the Emergency Diesel Generators ‎ (← links)
  • 05000482/LER-2018-002, Modification Activities Affected Control Room Envelope Boundary Causing a Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-2018-001, Inappropriate Use of Blind Flange for Containment Isolation Valve Results in Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-1917-003, Regarding ARV and MSSV Tornado Missile Vulnerabilities Result in Unanalyzed Condition ‎ (← links)
  • 05000482/LER-1917-001, Regarding Condition Prohibited by Technical Specifications Due to One Train of Component Cooling Water Inoperable ‎ (← links)
  • 05000482/LER-2016-002, Regarding Loss of Switchyard Bus Results in Emergency Diesel Generator Actuation ‎ (← links)
  • 05000482/LER-2016-001, Regarding Power Potential Transformer Overloading Results in Emergency Diesel Generator Inoperability ‎ (← links)
  • 05000482/LER-2015-003, Regarding Manual Reactor Trip Due to High Steam Generator Level Transient at Low Power ‎ (← links)
  • 05000482/LER-2015-004, Regarding Inadequate Procedure Error Results in Two Containment Isolation Valves Being in a Condition Prohibited by Technical Specifications ‎ (← links)
  • 05000482/LER-2015-002, Regarding Two Control Room Air Conditioning Trains Inoperable Due to Failure to Meet Surveillance Requirement ‎ (← links)
  • 05000482/LER-2015-001, Regarding Personnel Error Causes Two Inoperable Residual Heat Removal Trains ‎ (← links)
  • 05000482/LER-2014-004, Regarding Condition Prohibited by Technical Specifications Due to an Instrument Tunnel Sump Level Indication Transmitter Incompatible with the Containment Environment ‎ (← links)
  • 05000482/LER-2014-003, Regarding Failure of Safety Injection Accumulator Vent Line Due to Low Stress - High Cycle Fatigue Results in Degraded Reactor Coolant Boundary ‎ (← links)
  • 05000482/LER-2014-001, Regarding Failure to Comply with Required Action of Technical Specification 3.4.3 While Performing a Vacuum Fill of the Reactor Coolant System ‎ (← links)
  • 05000482/LER-2013-010, Technical Specification Required Shutdown Due to a Nonfunctional Class 1E Electrical Equipment Air Conditioning Unit Caused by Foreign Material ‎ (← links)
  • 05000482/LER-2013-009, Operating Corp, Post-Fire Safe Shutdown Design Issue May Impact Ability to Achieve Safe Shutdown ‎ (← links)
  • 05000482/LER-2013-008, Regarding Technical Specification Required Shutdown Due to a Nonfunctional Class 1E Electrical Equipment Air Conditioning Unit ‎ (← links)
  • 05000482/LER-2013-007, Nonfunctional Class 1E Electrical Equipment Air Conditioning Unit Results in Longer than Technical Specification Completion Time ‎ (← links)
  • 05000482/LER-2013-006, Regarding Technical Specification Required Shutdown Due to a Nonfunctional Class 1 E Electrical Equipment Air Conditioning Unit ‎ (← links)
  • 05000482/LER-2013-005, Regarding Fatigue Failure of Jacket Water Pressure Switch Diaphragm Results in Loss of the B Diesel Generator ‎ (← links)
  • 05000482/LER-2013-004, Regarding Torque Requirement Human Performance Issue Caused Nonfunctional Class 1 E Electrical Equipment Air Conditioning Unit and an Inoperable Control Room Air Conditioning Unit ‎ (← links)
  • 05000482/LER-2013-003, Regarding Movement of Irradiated Fuel Progressed After Non-Conservative Decision Making Resulted in Removal of One Source Range Monitor from Service ‎ (← links)
  • 05000482/LER-2013-002, Regarding Pressure Boundary Leakage on a Seal Water Injection Drain Line Due to Low Stress High Cycle Fatigue ‎ (← links)
  • 05000482/LER-2013-001, Regarding Broken Cylinder Head Stud Causes Inoperable Diesel Generator Longer than Technical Specification Completion Time ‎ (← links)
  • 05000482/LER-2012-005, Regarding Calculation Assumptions Lead to Inadequate Procedure, Resulting in LCO 3.0.3 Entry Due to Non- Functional Class 1 E Electrical Equipment Air Conditioning Unit ‎ (← links)
  • 05000482/LER-2012-004, Regarding Two Charging Pumps Capable of Injecting Into the RCS Due to Inadequate Definition of Centrifugal Charging Pump in LCO 3.4.12 ‎ (← links)
  • 05000482/LER-2012-003, Regarding B Train ECCS and Containment Spray System Inoperable Due to Damaged Watertight Containment Spray Pump Door Seal ‎ (← links)
  • 05000482/LER-2012-002, Regarding One Train of Automatic Safety Injection Blocked During Entry Into Mode 3 Due to Procedural Weakness ‎ (← links)
  • 05000482/LER-2012-001, For Wolf Creek Regarding Failure of 345 Kv Switchyard Breaker Due to Internal Fault Resulting in Reactor Trip and Coincident Loss of Offsite Power ‎ (← links)
  • 05000482/LER-2011-010, Cancellation of Licensee Event Report 2011-010-00, Diesel Generator Declared Inoperable Due to Inadequate Adjustment of the Diesel Generator Governor ‎ (← links)
  • 05000482/LER-2011-009-01, Regarding Inadequate Oil Analysis Causes Inoperable Auxiliary Feedwater Pump Longer than Allowed Outage Time ‎ (← links)
  • 05000482/LER-2011-011, Regarding Inadequate Analysis Assumptions Resulting in Deficient Control Room Evaluation Procedure ‎ (← links)
  • 05000482/LER-2011-004-02, Regarding Automatic Safety Injection Actuation Due to Operating Crew Failure to Follow Procedures ‎ (← links)
  • 05000482/LER-2011-009, Regarding Inadequate Oil Analysis Caused Inoperable Auxiliary Feedwater Pump Longer than Required Action Completion Time ‎ (← links)
  • 05000482/LER-2011-004-01, Regarding Automatic Safety Injection Actuation Due to Operation Crew Failure to Follow Procedures ‎ (← links)
  • 05000482/LER-2011-008, Regarding Post-Fire Safe Shutdown Latent Design Issue May Cause Essential Service Water System Flow Imbalance ‎ (← links)
  • 05000482/LER-2011-007, Manual Reactor Trip Due to Failed Controller Cards in the B Feedwater Pump Turbine Control System ‎ (← links)
  • 05000482/LER-2011-006, For Wolf Creek Generating Station, Regarding Auxiliary Feedwater Actuation Due to Operators Inability to Control Steam Generator Level in Mode 4 ‎ (← links)
  • 05000482/LER-2011-005, Regarding Procedure Weakness Allowed Entry Into Mode 6 with One Source Range Monitor Inoperable ‎ (← links)
  • 05000482/LER-2011-003, Cancellation of LER 11-003-00 for Wolf Creek Re Diesel Generator Declared Inoperable Due to Inadequate Reinstallation of Pipe Connection Resulting in Excessive Governor Oil Coolant Leak ‎ (← links)
  • 05000482/LER-2011-004, Regarding Automatic Safety Injection Actuation Due to Operating Crew Failure to Follow Procedures ‎ (← links)
  • 05000482/LER-2011-002, For Wolf Creek Generating Station, Regarding Diesel Generator Declared Inoperable Due to Inadequate Installation of a Fuel-Rack Control Pin ‎ (← links)
  • 05000482/LER-2011-001, For Wolf Creek Generating Station, Regarding Potential for a CVCS through-Weld Leak to Affect Reactor Coolant System Inventory After a Loss of Coolant Accident ‎ (← links)
  • 05000482/LER-2009-002, Revision to Commitment Completion Date Reported in LER 2009-002-00 Re Loss of Offsite Power Due to Lightning ‎ (← links)
  • 05000482/LER-2010-014, For Wolf Creek Generating Station, Regarding Technical Specification Required Shutdown Due to Inadequate Planning Resulting in Extended Emergency Diesel Generator Inoperability ‎ (← links)
  • 05000482/LER-2010-013, Regarding Potential Safe Shutdown Unanalyzed Condition Identified During Post-Fire Safe Shutdown Circuit Analysis ‎ (← links)
  • 05000482/LER-2010-012, Regarding Reactor Trip Due to Operators Inability to Control Steam Generator Level Oscillations at Low Power ‎ (← links)
  • 05000482/LER-2010-010, Regarding Inadequate Analysis Results in a Component Cooling Water Train to Be Declared Inoperable ‎ (← links)
  • 05000482/LER-2010-009, For Wolf Creek Regarding Pressurizer Level Higher than Assumed in the Inadvertent Operation of ECCS Analysis ‎ (← links)
  • 05000482/LER-2010-008, Regarding Personnel Error Results in Missing High Security Key ‎ (← links)
  • 05000482/LER-2009-010-01, Regarding Failure to Meet LCO 3.0.4b. During Transition from Mode 4 to Mode 3 ‎ (← links)
  • 05000482/LER-2010-007, For Wolf Creek Generating Station, Regarding Post-Fire Safe Shutdown Fire-Induced Multiple Spurious Operation Issues ‎ (← links)
  • 05000482/LER-2010-006, Regarding Manual Reactor Trip Due to Trip of Main Feedwater Pump ‎ (← links)
  • 05000482/LER-2010-005, Regarding Reactor Trip Due to Low Steam Generator Level from Trip of Main Feedwater Pump ‎ (← links)
  • 05000482/LER-2010-003, For Wolf Creek Regarding Post Fire Safe Shutdown Issue with the B Emergency Diesel Generator Voltage Control Circuitry ‎ (← links)
  • 05000482/LER-2010-004, Regarding Positive Reactivity Addition in Mode 2 with One Source Range Neutron Flux Channel Inoperable ‎ (← links)
  • 05000482/LER-2010-002, Regarding Turbine Trip Function of Reactor Trip P-4 Interlock Defeated During Entry Into and in Mode 3 ‎ (← links)
  • 05000482/LER-2009-009-01, For Wolf Creek, Regarding Defeating Feedwater Isolation on Low Tavg Coincident with P-4 Function Results in Missed Mode Change ‎ (← links)
  • 05000482/LER-2010-001, For Wolf Creek, Regarding Automatic Start of Motor Driven Auxiliary Feedwater Pumps Inoperable During Startup in Mode 1 ‎ (← links)
  • 05000482/LER-2009-011, For Wolf Creek, Regarding Intermediate Range Detector NI-36 Inoperable ‎ (← links)
• ML080780416 (redirect page) ‎ (← links)
• 05000482/LER-2008-009, Inadequate Compensatory Actions for a Fire Area ‎ (← links)
• 05000482/LER-2008-008, Regarding Potential for Residual Heat Removal Trains to Be Inoperable During Mode Change ‎ (← links)
• 05000482/LER-2008-007, Regarding Two Residual Heat Removal Trains Inoperable in Mode 3 Due to Check Valve Leakage ‎ (← links)
• 05000482/LER-2008-006, Entry Into Mode 4 Without an Operable Containment Spray System ‎ (← links)
• 05000482/LER-2008-005, Re Unanalyzed Condition Discovered Due to Improperly Installed Fuse in Class 1 E Electrical Equipment Room Cooler ‎ (← links)
• 05000482/LER-2008-004, Regarding Loss of Offsite Power Event When the Reactor Was De-fueled ‎ (← links)
• 05000482/LER-2008-003, Re Manual Reactor Trip Due to Loss of Steam Generator Level ‎ (← links)
• 05000482/LER-2008-002, Regarding Technical Specification Allowed Outage Time Exceeded Due to Room Cooler Leak ‎ (← links)