Pages that link to "05000413/LER-1996-001, Submits Modification to Commitment Contained in LER-96-001"

The following pages link to 05000413/LER-1996-001, Submits Modification to Commitment Contained in LER-96-001:

Displayed 22 items.

• ML20135D815 (redirect page) ‎ (← links)
• 05000413/LER-1996-001 (redirect page) ‎ (← links)
  • 05000413/LER-2002-002 ‎ (← links)
  • 05000413/LER-2007-004 ‎ (← links)
  • 05000413/LER-2007-002 ‎ (← links)
  • 05000413/LER-2001-003 ‎ (← links)
  • 05000413/LER-2001-002 ‎ (← links)
  • 05000413/LER-2001-001 ‎ (← links)
  • 05000413/LER-1995-001, Forwards LER 95-001 Re TS 3.0.3 Entry Due to Both Trains of CR Ventilation Inoperable ‎ (← links)
  • 05000413/LER-1995-003, Forwards Rev to LER 95-003 Re Failure to Perform TS Surveillance Due to Unanticipated Interaction of Sys ‎ (← links)
  • 05000413/LER-1996-001, Submits Modification to Commitment Contained in LER-96-001 ‎ (← links)
  • 05000413/LER-1950-412, Forwards Rept Summarizing Review Results of Interunit Electrical Interfaces,Which Was Part of Corrective Action for LER 50-412/85-51.Item Also Identified in Insp Repts 50-413/85-35 & 50-414/85-32 ‎ (← links)
  • 05000413/LER-1997-011, Forwards LER 97-011-00 Re ESF Actuation Due to RCS Leakage from Loop Drain Valves.Event Considered to Be of No Significance W/Respect to Health & Safety of Public ‎ (← links)
  • 05000413/LER-1990-025, Notifies of Missed Commitment & Change in Commitment Re LER 90-025 & Insp Repts 50-413/90-09 & 50-414/90-09.Prior Commitment Is Being Changed to Allow Continued Use of Vendor Methodology ‎ (← links)
  • 05000413/LER-1999-001, Forwards LER 99-001-00,re Inoperable Refueling Water Storage Tank Level Channels Resulting in Operation Outside Design Basis.Commitments Are Provided in Planned Corrective Action Section of LER ‎ (← links)
  • 05000413/LER-1997-008, Forwards LER 97-008-00 Re Inadequate Solid State Protection Sys Surveillance Testing.Event Considered to Be No Significance W/Respect to Health & Safety of Public ‎ (← links)
  • 05000413/LER-1998-019, Forwards LER 98-019-00 Re Inoperable Standby Shutdown Facility in Excess of TS AOT Due to Mispositioned Breakers. One Regulatory Commitment Is Contained in Planned Corrective Actions Section of Rept ‎ (← links)
  • 05000413/LER-1998-009, Forwards LER 98-009-00,concerning Unit Entering TS 3.0.3 Due to Inadequate Testing of Auxiliary Bldg Filtered Exhaust Sys ‎ (← links)
  • 05000413/LER-1998-006, Forwards LER 98-006-00,re Missed TS Surveillance on Pressurizer Heater Emergency Power Supply Testing. Commitments Made within Ltr,Encl ‎ (← links)
  • 05000413/LER-1998-005, Forwards LER 98-005-00,re Missed TS Surveillance on Abv. Commitments Made within Ltr,Encl ‎ (← links)
  • 05000413/LER-1998-002, Forwards LER 98-002-00,incorrectly Set Valve Leads to Elevated Condensate Storage Sys Temperature,Causing Condition Outside Design Basis of Plant.Planned Corrective Actions Section of Rept Contain Commitments ‎ (← links)
  • 05000413/LER-1998-007, Forwards LER 98-007-00,concerning Missed TS Surveillance on Containment Penetration Testing Due to Literal Compliance Issue ‎ (← links)
  • 05000413/LER-1998-001, Forwards LER 98-001-00 Re Both Trains of Control Room Area Ventilation Inadvertently Disabled During Restoration.Ltr Contains Commitments to Perform Corrective Actions ‎ (← links)
  • 05000413/LER-1986-037, Forwards LER 86-037-00 Re Inoperable Ice Condenser Lower Inlet Doors Due to Personnel Error.Event of No Significance to Health & Safety of Public.Previous LER Numbered 86-037 Changed to 86-033 by ‎ (← links)
  • 05000413/LER-2021-005, Automatic Actuation of the 1B Emergency Diesel Generator Load Sequencer on Bus Under-voltage Condition ‎ (← links)
  • 05000413/LER-2020-003, Valid Actuation of the Unit 1 Reactor Protection System and Auxiliary Feedwater System ‎ (← links)
  • 05000413/LER-1998-006-01, :on 980514,missed TS Surveillance on Pressurizer Heater EP Supply Testing.Caused by Incompatible W/Sys Design.License Amend Was Submitted to Revise SR 4.4.3.3 ‎ (← links)
  • 05000413/LER-1998-005-01, :on 980514,missed TS Surveillance on Abv Sys. Caused by Misinterpretation of TS SR 4.7.7.d.1.Entered Both Trains of Auxiliary Building Filtered Exhaust Sys of Both Units in TS 4.0.3 ‎ (← links)
  • 05000413/LER-1998-002-04, :on 980507,incorrectly Set Valve Leads to Elevated Condensate Storage Sys Temperature,Causing Condition Outside Design Basis of Plant,Was Noted.Caused by Inadequate Training.Alarm Response Guideline Revised ‎ (← links)
  • 05000413/LER-1989-008, :on 890305,reactor Trip Occurred Due to Exceeding Overpower Delta T Loop 2 Setpoint.Caused by Personnel Error & Actuator Failure.Work Request Issued & Instrument Isolation Valve Replaced ‎ (← links)
  • 05000413/LER-1989-006-01, :on 890224-28,turbine Bldg Sump Radiation Monitor Unintentionally Returned to Svc in Inoperable Condition.Caused by Inappropriate Action Due to Lack of Attention to Detail ‎ (← links)
  • 05000413/LER-1989-022, :on 890824,manual Reactor Trip Occurred Due to Failure of Gasket on Main Feedwater Valve Positioner Control Air Manifold.Main Feedwater Valve Positioners Being Inspected Weekly ‎ (← links)
  • 05000413/LER-1989-007, :on 890127,turbine Driven Auxiliary Feedwater Pump Failed.Caused by Stress Corrosion Cracking at Key Slot of Final Stage Shaft Sleeve.Shaft Replaced & Feedwater Pump Returned to Svc ‎ (← links)
  • 05000413/LER-1989-005-01, :on 890227,header B of Nuclear Svc Water (NSW) Sys Automatically Aligned to Standby NSW Pond.Cause Unknown, But Event Possibly Caused by Equipment Malfunction.Work Request Issued to Replace Suspect Relays ‎ (← links)
  • 05000413/LER-1989-019, :on 890628,unplanned Automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Occurred.Caused by Defective Procedure Due to Erroneous Circuit Isolation.Calibr Procedures Revised ‎ (← links)
  • 05000413/LER-1989-017, :on 890626,steam Generator 1A Main Feedwater Control Valve Began Closing Causing Generator Level to Decrease.Caused by Action Performance W/Insufficient Precision.Torn Gasket Replaced ‎ (← links)
  • 05000413/LER-1989-018, :on 890628,discovered That Required Charcoal Cartridge Missing from Particulate & Charcoal Samples.Caused by Inappropriate Personnel Action.Technician Removed Particulate Filter & Replaced W/New Filter ‎ (← links)
  • 05000413/LER-1989-001, :on 890107,Train a Blackout Due to Inappropriately Installed Protective Relay.Apparently Relays Were Swapped During Initial Installation During 1978.RHR Reestablished by Placing Nd Train B in Svc ‎ (← links)
  • 05000413/LER-1988-026, :on 881126,static Inverter 1EID & 120-volt Ac Power Panelboard Experienced Undervoltage Condition for Approx 2 & Multiple ESF Alarms Displayed.Caused by Low Voltage Condition in Inverter ‎ (← links)
  • 05000413/LER-1989-012, :on 890107,6,900-volt Tie Breaker Tripped After Reactor Coolant Pump 1C Started,Causing Blackout & Loss of Power to RHR Pump,Fuel Cooling Pump & Component Cooling Pump.Caused by Error in Relay Installation ‎ (← links)
  • 05000413/LER-1989-013, :on 890412,discovered That Channel Checks for Containment Hydrogen Monitors Inadequate to Verify Standby Readiness of Monitors.Caused by Deficient Vendor Documentation.Hydrogen Monitor Repaired ‎ (← links)
  • 05000413/LER-1987-037, :on 870909,two Broken Pipe Supports Noted on ITT-Grinnell mini-stiff Pipe Clamps & Metal Strap Wrapped Around Pipe.Caused by Mfg Deficiency.Straps Replaced W/Heat Treated Strap.Also Reported Per Part 21 ‎ (← links)
  • 05000413/LER-1989-003-03, :on 890221,jumper Used to Check Relay Contacts Short Circuited,Resulting in Closure of Steam Generator 2C MSIV & Opening of 3 2C Code Safety Relief Valves.Caused by Mgt Deficiency.Setpoint Recalibr ‎ (← links)
  • 05000413/LER-1989-004, :on 890222,automatic Alignment Brought on by Momentary Short Across Level Transmitter.Caused by Inappropriate Action Due to Improper Following of Procedure. Training on Proper Method to Be Provided ‎ (← links)
  • 05000413/LER-1989-011, :from 890131 to 890413,lower Containment Temp Monitoring Not Performed Per Tech Spec Compensatory Action. Caused by Not Notifying Personnel of Inoperable Smoke Detectors.Hourly Compensatory Action Initiated ‎ (← links)
  • 05000413/LER-1989-015-01, :on 890616,emergency Low Level Signal for Nuclear Svc Water Sys Pit a Initiated Automatic Swap to Standby Nuclear Svc Water Pond.Caused by Blown Fuse AA-2. Fuse Replaced W/Littelfuse Type Flq Fuse ‎ (← links)
  • 05000413/LER-1989-021, :on 890727,Tech Spec Required Power Reduction Due to Failure of Two Refueling Water Storage Tank Level Channels Caused by Lightning Strike.Facility Returned to 100% Power After Transmitter Replaced ‎ (← links)
  • 05000413/LER-1989-002-03, :on 890201,maint Personnel Declared Floor Elevations 543 Through 594 Ft of Auxiliary Bldg Inoperable as Fire Boundary Seals.Incident Classified as Design Oversight.Security Initiated Hourly Fire Watch ‎ (← links)
  • 05000413/LER-1989-010, :on 890331,unusual Noises Heard Coming from 1CRA-AHU-1 Motor.Caused by Motor lock-up Due to Failure of Inboard Bearing.Maint & Iae Replaced 1CRA-AHU-1 Motor Under Work Request 50291 OPS ‎ (← links)
  • 05000413/LER-1989-009-03, :on 890515,personnel Identified Potential Violation of Intent of Tech Spec 4.9,4.1 Associated W/ Incore Instrumentation Room Purge Subsys.Caused by Incomplete Tech Specs.Tech Spec Change Made ‎ (← links)
  • 05000413/LER-1989-014, :on 881020,performance Personnel Documented That Tech Spec 3.7.5 Appeared Unconservative in Comparison to FSAR Section 9.2.5 Re Standby Nuclear Svc Water Pond Temp Requirements.Procedure Developed ‎ (← links)
  • 05000413/LER-1998-014, :on 980805,both DGs Inoperable,Resulting in Failure to Perform DG Surveillance within Required Surveillance Interval,Was Revealed.Caused by Misinterpretation of Ts.Ts 4.0.3 Entered ‎ (← links)
  • 05000413/LER-1998-015, :on 980805,TS Required Shutdown & Operation Prohibited by TS Associated W/Ice Condenser,Was Initiated. Caused by Lack of Procedural Guidance.Flow Channels Cleared, Foreign Matl Removed,Dented Baskets Repaired ‎ (← links)
  • 05000413/LER-1998-013, :on 980709,noncompliance W/Tech Specs Identified During Review of Radiation Protection Procedure. Caused by Incorrect TS Requirements Contained in Radiation Protection Procedures.Procedures Revised ‎ (← links)
  • 05000413/LER-1998-013-01, Forwards LER 98-013-01 Re Operation Outside of Tech Specs Due to Analyzing Grab Samples at Incorrect Lower of Detection.Two Regulatory Commitments Contained in Planned Corrective Actions Section of Rept ‎ (← links)
  • 05000413/LER-1987-032, :on 870729,engineer Determined That Battery Banks in 125 Volt Dc Vital Instrumentation & Control Power Sys Inoperable.Caused by Mgt/Qa Deficiency.Intercell Resistance Readings Taken ‎ (← links)
  • 05000413/LER-1987-030, :on 870726,failure to Perform Type C Leak Rate Test on Valve 1NI-120B Following Replacement of Torque Switch Occurred.Caused by Inadequate Retest Policy.Retest Performed.Memo Re Leak Rate Tests to Be Issued ‎ (← links)
  • 05000413/LER-1987-031, :on 870729,vent Gas Radiation Monitor Found Inoperable.Caused by non-conservative High Radiation Alarm Setpoint.Setpoint Returned to Original Setting & Policy Will Be Clarified ‎ (← links)
  • 05000413/LER-1986-048, :on 860824,containment Purge Sys Automatically Isolated on Three Separate Occasions.Caused by Defective Procedure.After Each Isolation,All Areas of Containment Sampled & New 1EMF39L Setpoints Calculated ‎ (← links)
  • 05000413/LER-1987-018, :on 870423,containment Pressure Channel Declared Inoperable.Caused by Failure to Return Transmitter to Svc Following Calibr.Pressure Transmitter Isolation Valve Reopened & Channel Returned to Svc ‎ (← links)
  • 05000413/LER-1987-033, :on 870406,operability of Diesel Generator 1B Not Verified within Time Limit Required by Tech Specs.Event Discovered on 870803.Caused by Personnel Error.Weekly Surveillances Begun Upon Discovery of Incident ‎ (← links)
  • 05000413/LER-1987-017, :on 870404,technician Removed Hatch Plug to Allow Access to Boric Acid Batching Tank.Plug Not Replaced within 1 H & No Fire Watch Established.On 870408,removed Plug Discovered Missing.Hatch Plug Replaced ‎ (← links)
  • 05000413/LER-1987-029, :on 870713,motor Driven Auxiliary Feedwater Pumps Started Automatically Following Main Feedwater Isolation.Caused by Opened Reactor Trip Breaker 1B.Breaker Closed & Main Feedwater Isolation Reset ‎ (← links)
  • 05000413/LER-1987-028, :on 870711,reactor Automatically Tripped on Inadvertently Simulated Turbine Trip.Caused by Failure of Disk Dump Valve to Reseat.Mod Installed to Main Turbine Valves & All Disk Valves Will Be Inspected ‎ (← links)
  • 05000413/LER-1986-057, :on 861024,determined That 53 Valves Motor Actuator Torque Switches May Have Been Set Incorrectly. Caused by Design,Mfg & Const/Installation Deficiency. Actuators Reset ‎ (← links)
  • 05000413/LER-1987-027, :on 870706,auxiliary Feedwater (CA) Pump 1B Discharge to Steam Generator 1C Isolation Valve Closed Automatically.Caused by Isolated Pressure Switch at Discharge of CA Pump 1A.CA Pump 1 Restarted ‎ (← links)
  • 05000413/LER-1987-026, :on 870706,reactor Manually Tripped Due to Decreased Speed of Main Feedwater Pump Turbine.Caused by Piece of Uninsulated Scrap Wire Between Frequency to Voltage Converter Chip.Wire Removed ‎ (← links)
  • 05000413/LER-1998-009-01, :on 980722,unit Entered TS 3.0.3 Due to Inadequate Testing of Auxiliary Building Filtered Exhaust Sys.Caused by Inadequate Procedure.Initiated 24 H Allowance of TS 4.0.3 for Missed Procedure ‎ (← links)
  • 05000413/LER-1998-011, :on 980723,discovered That Two RWST Level Channels Were Inoperable.Caused by Ground Currents from Lightning Strikes.Level Transmitters Were Replaced & Recalibr & Initiated Compensatory Measures ‎ (← links)
  • 05000413/LER-1987-040, :on 871105,turbine-driven Auxiliary Feedwater Pump Automatically Opened & Steam Generator Blowdown Containment Isolation Valves Closed.Caused by Procedural Deficiency.Procedures Revised ‎ (← links)
  • 05000413/LER-1998-012, :on 980706,entered TS 3.0.3 Due to Inoperability of Both Trains of CR Ventilation.Caused by Improper Sys Isolation.Properly Secured Damper in Closed Position & Will Revise Applicable Damper Procedures ‎ (← links)
  • 05000413/LER-1985-053, :on 850729,diesel Generator 1A Battery Charger Inoperable Due to Blown Fuses.Caused by Design Deficiency, Personnel Error & Procedural Deficiency.Fuses Replaced & Charger Returned to Svc ‎ (← links)
  • 05000413/LER-1987-039, :on 871102,motor Driven Auxiliary Feedwater Pump 1B Started Automatically Due to Loss of Both Main Feedwater Pumps.Caused by Simultaneous Implementation of Two Nuclear Station Mods.Pump Secured ‎ (← links)
  • 05000413/LER-1998-010, :on 980624,pinhole Leak in AFW Nozzle Tempering Line Caused Noncompliance W/Ts Structural Integrity Requirements.Caused by Previous Accelerated Flow Rates & Improper Socket Weld Fit Up.Isolated Piping Containing Hole ‎ (← links)
  • 05000413/LER-1987-038, :on 871012,discovered That Hourly Fire Watches Not Performed for Room 428.Caused by Personnel Error.Room 428 Hatch Covers Installed & Incident Reviewed W/Radwaste Chemistry Personnel.Hourly Fire Watch Resumed ‎ (← links)
  • 05000413/LER-1998-008, :on 980611,noncompliance W/Ts Requirements for Wgs O Analyzers Was Noted.Caused by Error in Interpretation of TS Requirements.Procedures Revised ‎ (← links)
  • 05000413/LER-1987-025, :on 870629,vent Flow Rate Manual Calculation Not Performed within 4 H Tech Spec Limit.Caused by Personnel Error.Personnel Counseled & Procedure Revised to Clarify Procedural Steps Re Notification ‎ (← links)
  • 05000413/LER-1998-007-01, :on 980608,missed TS Surveillance on Containment Penetration Testing Due to Literal Compliance Issue.Caused by Inappropriate Implementation of Staggered Test Requirement.Affected Penetrations Successfully Tested ‎ (← links)
  • 05000413/LER-1987-036, :on 860830,incorrect Alignment Performed Rendering Nuclear Svc Water (Rn) Train a Inoperable Re Unit 2 Power Operation.Caused by Design Deficiency Due to Incorrect Identification of Rn Alignment ‎ (← links)
  • 05000413/LER-1989-003-02, :on 890206,manual Auxiliary Feedwater Actuation Occurred Following Manual Turbine Trip Due to High Turbine Vibration.Caused by Equipment Malfuncion.Condenser Vacuum Broken to Reduce Turbine Speed ‎ (← links)
  • 05000413/LER-1987-023, :on 870411,surveillance of Fire Detection Zones Missed Due to Lack of Administrative Controls for Retiring Tech Spec Standing Work Requests.Work Request Initiated & Surveillance Requirements Performed ‎ (← links)
  • 05000413/LER-1987-024, :on 870617,after Diesel Generator 1B Declared Inoperable,Unit Supervisor Failed to Verify Operability of Ac Offsite Power Source within 8-h Time Limit.Incident Reviewed W/Supervisor & Appropriate Personnel ‎ (← links)
  • 05000413/LER-1987-022, :on 870610,Type B Leak Rate Tests of Conax Electrical Penetration Assemblies Not Performed Per Tech Specs.Caused by Defective Procedure.Test Conducted & Results Acceptable.Procedure Will Be Rewritten ‎ (← links)
  • 05000413/LER-1987-001, :on 870105,inadvertent Radioactive Gas Release Occurred Causing Auxiliary Bldg Ventilation Sys to Swap from Bypass to Filter Mode.Caused by Failure of Waste Gas Sys Drain Trap T-04 ‎ (← links)
  • 05000413/LER-1987-021-01, :on 870608,diesel Generator Declared Inoperable Due to Low Electrolyte Levels in Diesel Generator Battery. Caused by Personnel Error.Availability of Offsite Power Sources Subsequently Verified ‎ (← links)
  • 05000413/LER-1987-034, :on 870823,reactor Trip Breakers Opened While Shutting Down Due to Inability to Satisfy RCS Leakage Tech Spec Requirements.Caused by Failure of Source Range Neutron Detector.Hi Flux Reactor Trip Alarm Bypassed ‎ (← links)
  • 05000413/LER-1987-035, :on 870810,potential Control Room Area & Chilled Water Sys Inoperability During Diesel Generator Load Sequensor Testing Discovered.Caused by Procedural Deficiency.Procedures Will Be Revised ‎ (← links)
  • 05000413/LER-1987-005, :on 870130,determined That Containment Air Return Fans Could Be Inoperable Due to Collected Spray Flooding.Caused by Design Mfg,Const/Installation Deficiency. Curbs Installed ‎ (← links)
  • 05000413/LER-1998-003-01, :on 980218,omission in Retest Manual Leads to Failure to Perform Required Retest Prior to Restoring Ci Valves to Svc.Retest Manual Will Be Updated to Reflect Specific TS Requirements for Ci Valves ‎ (← links)
  • 05000413/LER-1997-006-03, :on 970804,discovered Missed TS Surveillance on P-11 P-13 Permissive Interlocks.Caused by Inadequate Procedures.Tested Subject Interlocks Successfully & Revised Analog Channel Operational Test Procedures ‎ (← links)
  • 05000413/LER-1998-004-01, :on 980216,missed TS Surveillance on CR Area Ventilation Sys Actuation Instrumentation Noted.Caused by Incorrect Mode Specification Requirements in Affected Ts. Submitted License Amend & Verified TS Are Met ‎ (← links)
  • 05000413/LER-1999-015, :on 990616,discovered That Auxiliary Bldg Filtered Ventilation Exhaust Sys Was Inoperable.Caused by Improperly Positioned Vortex Damper.Damper Was Repositioned Correctly & Sys Was Retested Successfully ‎ (← links)
  • 05000413/LER-1998-001-02, :on 980205,boths Trains of CR Area Ventilation Inadvertently Disabled During Restoration.Caused by Inadequate Maint Procedure.Revised Procedure & Personnel Involved Have Been Counseled ‎ (← links)
  • 05000413/LER-1999-009, :on 990518,inoperability of Containment Valve Injection Water Sys Valve Was Noted in Excess of TS Limits. Caused by Inadequate Testing Following Surveillance Test Failure.Valve Was Retested & Restored to Service ‎ (← links)
  • 05000413/LER-1986-050, :on 860916,fuel Pool Ventilation Sys Inoperable.Caused by Blocked Open Doors.Reinforced Polyethylene Sheets Installed Over Vents & Doors Ax 6350 & CAD 612 Closed to Restore Sys Operability ‎ (← links)
  • 05000413/LER-1986-051, :on 860106,emergency Hatch Between Upper & Lower Containment Inoperable.Caused by Personnel Error. Importance of Instructions & Directions in Work Requests & Procedures Will Be Reviewed ‎ (← links)
  • 05000413/LER-1987-009-01, :on 870217 & 0310,fire Doors Discovered Propped Open.No Hourly Fire Watch Had Been Established.Caused by Personnel Error.Personnel Reminded to Keep Fire Doors Closed ‎ (← links)
  • 05000413/LER-1987-012, :on 870311,instrument Air Supplies for Three Pressurizer PORVs Discovered Incorrectly Connected.Caused by Design/Installation Deficiency & Personnel Error.Air Supplies Rerouted ‎ (← links)
  • 05000413/LER-1987-013, :on 870316,manual Reactor Trip Occurred After Main Feedwater Control Valve Failed Closed.Cause Unknown. Control Circuit Components Replaced & Tested & Reactor Trip Response Procedure Revised ‎ (← links)
  • 05000413/LER-1986-041-01, :on 860801,surveillance Test Discovered Not Performed for Reactor Bldg Fire Detection Zones After Unit in Cold Shutdown for More than 24 H.Caused by Lack of Procedure Identifying Requirements ‎ (← links)
  • 05000413/LER-1987-011-03, Forwards LER 87-011-03 Re Shutdown Due to Diesel Generator Inoperability Because of Mfg Deficiency.Ler 87-011-01,dtd 870506 Should Have Been Rev 2 & Did Not Include Changes from 870413 Submittal ‎ (← links)
  • 05000413/LER-1987-020, :on 870514,determined That Weekly Fire Door Insp Not Performed on 870508.Caused by Personnel Error.Insp Performed Upon Discovery.Memo Issued to Remind Personnel of Insp ‎ (← links)
  • 05000413/LER-1986-049, :on 860825,automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Inadvertently Occurred.Caused by Personnel Error.Sys Realigned & Transfer Switch Returned to Control Room Position ‎ (← links)
  • 05000413/LER-1986-035, :on 860705,main Feedwater Isolation Occurred Due to Steam Generator D hi-hi Level.Caused by Defective Procedure.Isolation Signal Reset & Feedwater Flow Restored. Sufficient Guidance Restored to Procedure ‎ (← links)
  • 05000413/LER-1987-019, :on 870501,two Work Requests Were Discovered Failing to Specify Retest Requirements.Caused by Personnel Failure to Specify Retest Requirements on Implementation Plan.Incident Reviewed W/Appropriate Personnel ‎ (← links)
  • 05000413/LER-1986-042, :on 860808,reactor Tripped During Breaker Testing.Caused by Personnel Error.Supervisors & Technicians Will Be Cautioned Re Importance of Attention to Detail Concerning Testing ‎ (← links)
  • 05000413/LER-1986-043, :on 860808,auxiliary Feedwater Actuation Signal Received Due to Failure of Main Feedwater Pump Turbine Condenser Outlet Control Valve.Caused by Failure of Mechanical Operator on Valve 1RC3 ‎ (← links)
  • 05000413/LER-1986-037-01, :on 860731,ice Condenser Inlet Doors Found Inoperable Since 860310.Caused by Personnel Error in Indicating That Acceptance Criteria Met When Data Indicated Contrary.Doors Retested & Found Operable ‎ (← links)
  • 05000413/LER-1986-041, :on 860801,reactor Bldg Fire Detection Zones Surveillance Test Not Performed for More than 24 H from 860615-19.Cause Under Investigation.Final Rept Expected by 860926 ‎ (← links)
  • 05000413/LER-1986-036, :on 860709,letdown Contamination Isolation Valve Inoperable.Caused by Inadequate Procedure for Certification of Retorke Valve Actuators.Actuator Replaced & Set to Required Torque ‎ (← links)
  • 05000413/LER-1986-009, :on 860129,main Feedwater (CF) Pump 1A Tripped on Three Occassions.Caused by Failure of Pump Discharge Isolation Valve Operator.Valve Operator Provided False Open Indication While Valve Closed ‎ (← links)
  • 05000413/LER-1987-015-01, :on 870409,steam Generator 1A Main Feedwater Isolation Valve Unexpectedly Closed & Reactor Tripped.Caused by Moisture in Terminal Box Causing Fuse to Blow,Failing Valve Closed.Terminal Box Dried & Resealed ‎ (← links)
  • 05000413/LER-1987-016, :on 870409,urgent Failure Alarm & rod-bottom Alarm for Rod D-14 Received on Digital RPI Sys.Caused by Failure in Data Channel a of Digital RPI Sys for Rod D-14. Work Request Initiated ‎ (← links)
  • 05000413/LER-1986-005, :on 860117,both Trains of Control Ventilation/ Chilled Water Sys Inoperable at 100% Power.Caused by Misapplied Pump Seals,Unreliable Compression Tank Alarm & Unreliable Makeup Source ‎ (← links)
  • 05000413/LER-1987-011-01, Forwards LER 87-011-01 Re Shutdown Due to Diesel Generator Inoperability Because of Mfg Deficiency.Part 21 Related ‎ (← links)
  • 05000413/LER-1987-014, :on 870406,RHR Pumps a & B Suction from Refueling Water Storage Tank Check Valves Discovered Not Full Stroke Tested.Caused by Mgt/Qa Deficiency.Valves Stroke Tested & Procedures Issued ‎ (← links)
  • 05000413/LER-1986-055, :on 861004,diesel Generator 1A Started on Blackout Signal During Automatic Transfer Test of 6,900-volt Normal Auxiliary Power Sys.Cause Undetermined.Diesel Generator 1A Secured & Test Reperformed ‎ (← links)
  • 05000413/LER-2020-002, Re Unacceptable Indication Identified During Reactor Pressure Vessel Head Nozzle Penetration Inspection ‎ (← links)
  • 05000413/LER-1987-003, :on 870124,results of Boron Analyses Performed on Samples from Cold Leg Accumulator B After Each of Four Water Additions Exceeded Tech Specs.Cause by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000413/LER-1986-058, :on 861111,overtemp Delta T Reactor Trip Occurred on Increasing Reactor Coolant Temp Rate.Caused by Personnel Error in Adjusting Potentiometers Used in Test of Resistance Temp Devices.Main Feedwater Reset ‎ (← links)
  • 05000413/LER-1999-009-01, Forwards LER 99-009-01,re Inoperability of Containment Valve Injection Water Sys Valve in Excess of TS Limits. Commitments Are Contained in Planned Corrective Actions Section of Attached Rept ‎ (← links)
  • 05000413/LER-1986-030, :on 860611,steam Generator B lo-lo Level Occurred,Causing Reactor Trip.Caused by Personnel Error. Personnel Counseled & ex-core Nuclear Instrumentation Sys Calibr at Power Revised ‎ (← links)
  • 05000413/LER-1999-014, :on 990816,missed Surveillances & Operation Prohibited by TS Was Noted.Caused by Defective Procedures or Programs Inappropriate TS Requirements.Affected Procedures/ Programs Were Revised & Testing Was Performed ‎ (← links)
  • 05000413/LER-1999-013, :on 990803,RHR Heat Exchanger Bypass Valves Were Not Verified Per TS Surveillance.Caused by Historical Fact That Surveillance to Verify Valve Position Has Never Been Performed.Revised Surveillance to Add Valves ‎ (← links)
  • 05000413/LER-1999-012, :on 990727,adverse Sys Interaction Between Annulus Ventilation Sys & Auxiliary Building Ventilation Sys Was Discovered.Caused by Inadequate Design.Compensatory Actions Developed & Implemented.With ‎ (← links)
  • 05000413/LER-1987-001-02, :on 870105,inadvertent Radioactive Gas Release Occurred.Caused by Failure of Waste Gas Drain Trap T-04 & Mgt & QA Deficiencies.Work Request Initiated to Repair Drain Trap ‎ (← links)
  • 05000413/LER-1987-002, :on 870111,unit Shutdown Commenced When Unidentified Reactor Coolant Leakage Greater than 1 Gpm Determined.Caused by Leak in Loop C RTD Manifold Tubing. Leak Repaired & Unit Returned to Power ‎ (← links)
  • 05000413/LER-1986-024, :on 860505,automatic Alignment of Nuclear Svc Water Sys to Standby Nuclear Svc Water Pond Inadvertently Occurred.Caused by Personnel Error.Memo Issued Emphasizing Consequences When Terminal Stud Nut Loosened ‎ (← links)
  • 05000413/LER-1999-011, :on 990723,missed Surveillance on Both Trains of CR Area Ventilation Sys Resulted in TS Violation.Caused by Defective Procedure.Revised Procedures ‎ (← links)
  • 05000413/LER-1986-019, :on 860411,breaker Supplying Control Power to Control Room Air Intake Radiation Monitor & Auxiliary Bldg Ventilation Radiation Monitor Tripped.Caused by Personnel Error.Breaker Reset ‎ (← links)
  • 05000413/LER-1986-047, :on 860822,Train a Safety Injection Signal Occurred.Caused by Personnel Error When Switches NI29 & NI30 Sliding Links Opened.Switches Reset.Links Closed.Training Procedures Will Be Reviewed ‎ (← links)
  • 05000413/LER-1986-046, :on 860816,steam Generators Reactor Trip Alarm Occurred & motor-driven Auxiliary Feedwater Pump B Started Automatically.Caused by lo-lo Level in Steam Generator D. Pump B auto-start Logic Secured ‎ (← links)
  • 05000413/LER-1999-010, :on 990504,small Leak Was Discovered in Section of Train B Nuclear Svc Water Sys Piping on Unit 1 During Operator Rounds.Caused by Inadequate Testing of NSW to AFW Supply Piping.Nsw to AFW Piping Cleaned ‎ (← links)
  • 05000413/LER-1999-010-01, Forwards LER 99-010-01 Which Replaces LER 99-002.Rept Number Has Been Changed in Order to Conform to Numbering Convention Specified in NUREG-1022,since Primary Event Involved Both Units ‎ (← links)
  • 05000413/LER-1986-039, :on 860715,turbine Driven Auxiliary Feedwater Pump 1 & Standby Shutdown Sys Discovered Inoperable.Caused by Personnel Failure to Ensure That CA Pump 1 Stop Check Valve Opened Prior to Being Locked ‎ (← links)
  • 05000413/LER-1986-045, :on 860815,containment Purge Sys Tripped Due to High Radiation Signal from 1EMF-39L,containment Gas Monitor. Caused by Conservative Tech Specs.Setpoint for 1EMF-39L Changed & VP Release Resumed ‎ (← links)
  • 05000413/LER-1987-006, :on 870131,reactor Trip Occurred on High flux- Low Power Reactor Trip Signal.Caused by Defective Procedure & Training Deficiency.Control Room Personnel Stabilized Unit in Hot Standby (Mode 3) ‎ (← links)
  • 05000413/LER-1987-007, :on 870209,Train B of Nuclear Svc Water Sys Automatically Aligned to Standby Nuclear Svc Water Pond Due to Loss of Power to Control Relays in Transfer Circuit. Cause Undetermined.Valves Opened ‎ (← links)
  • 05000413/LER-1987-004, :on 870124,10 Containment Air Release & Addition Sys Gaseous Waste Release Packages Improperly Prepared.Caused by Personnel Error.Health Physics Technician Retrained & Requalified on Procedures ‎ (← links)
  • 05000413/LER-1986-033, :on 860619,while Replacing Defective Level Transmitter in Nuclear Svc Water (Rn) Pump Pit A,Rn Sys Automatically Aligned to Standby Rn Pond.Caused by Defective Procedure.Rn Sys Realigned ‎ (← links)
  • 05000413/LER-1988-047, :on 871221,reactor Trip Signal & Feedwater Isolation (Fi) Signal Occurred & on 871224,FI/turbine Trip Signal Actuated.Caused by Design Deficiency & Personnel Error,Respectively.Procedure Involved Revised ‎ (← links)
  • 05000413/LER-1999-007, :on 990426,operation Prohibited by TS 3.4.7 Was Noted Due to Inoperable Train of Rhr.Caused by Inadequate Work Sequencing.Returned B Train RHR to Operable Status by Restoring Power to Valve 1NI136B ‎ (← links)
  • 05000413/LER-1999-006, :on 990408,CR Ventilation Sys Was Noted Inoperable Due to Spurious Closure of Intakes Resulting in Entry Into TS 3.0.3.Caused by Poor Communication.Reviewed Communication Techniques for Improvements ‎ (← links)
  • 05000413/LER-1986-026, :on 860517,during Rod Control Sys Fuse Replacement,High Negative Flux Rate power-range Reactor Trip Occurred.Caused by Lack of Procedure for Fuse Replacement. New Procedure Issued ‎ (← links)
  • 05000413/LER-1987-010, :on 870302,diesel Generator 1B Declared Inoperable Due to Loss of Shutdown Air Pressure.Caused by Mgt/Qa Deficiency.Available Power Source Operability Check Successfully Completed ‎ (← links)
  • 05000413/LER-1986-025, :on 860514,reactor Trip Occurred on Steam Generator a lo-lo Level Alarm.Caused by Failure of Channel Loop Power Supply Card.Power Supply Card & Transmitter 1CFLT5510 Replaced ‎ (← links)
  • 05000413/LER-1987-009, :on 870217,fire Watch Not Established Following Discovery of Two Fire Doors Propped Open.Caused by Personnel Error.Util Unable to Identify Responsible Personnel.Addl Door Found Open on 870310.Rept Will Be Revised ‎ (← links)
  • 05000413/LER-1999-004, :on 990310,operation Prohibited by TSs Was Noted.Caused by Incorrect TS Requirements for Cravs & Auxiliary Bldg Filtered Ventilation Exhaust Sys Actuation Instrumentation.Submitted Lar.With ‎ (← links)
  • 05000413/LER-1986-021, :on 860417,when Sliding Link Opened to Isolate 5 Time Delay Relay for turbine-driven Auxiliary Feedwater Pump (Capt),Steam Supply Valves Opened,Initiating Closure of Link & Terminating Capt Start ‎ (← links)
  • 05000413/LER-1999-003, :on 990305,violation of TS Occurred Due to Inoperable Ice Condenser Lower Inlet Doors.Caused by Ice/ Frost Buildup Restricting Door Movement.Frost/Ice Was Cleared from Coolers & Condenser Was Declared Operable ‎ (← links)
  • 05000413/LER-1986-038, :on 860712,vent Particulate,Iodine & Gas Radiation Monitors Discovered Inoperable.Caused by Personnel Error.Output Blocking Jumper Removed Following Maint ‎ (← links)
  • 05000413/LER-1985-059, :on 851010-12,reactor Shut Down Due to RCS Leakage in Excess of 1 Gpm.Caused by Leaking Compression Tube Fitting on Flow Transmitter.Fitting Tightened ‎ (← links)
  • 05000413/LER-1985-060, :on 851010,both motor-driven Auxiliary Feedwater Pumps Automatically Started After Main Feedwater Pump Tripped on High Discharge Pressure.Caused by Unidentified Primary Coolant Sys Leak ‎ (← links)
  • 05000413/LER-1999-002, :on 990225,three RHR Sys Valves Did Not Meet ESF Response Time Requirements.Caused by Procedure Deficiency.Evaluated to Determine If 12 Second Response Time Can Be Changed or If Mod to Valve Will Be Necessary ‎ (← links)
  • 05000413/LER-1985-052, :on 850814,boron Concentration of Upper Head Injection Not Verified Every 6 H as Required by Upper Head Injection Operating Procedure.Caused by Personnel Error. Boron Concentration Sample Ordered ‎ (← links)
  • 05000413/LER-1987-008, :on 870204,discovered That Two Concrete Covers Over Two Nuclear Svc Water Sys Manways Not Installed & Could Not Be Found.Cause Undetermined.Temporary 2-inch Thick Steel Plates Installed Over Two Manway Openings ‎ (← links)
  • 05000413/LER-1985-020, :on 850314,reactor Trip Occurred Due to Power Range High Flux Rate Signal.Caused by Loose Detector Cable Inside Power Range Cabinets.Work Request Initiated to Repair Loose Cable ‎ (← links)
  • 05000413/LER-1985-021, :on 850313,during Performance of Turbine Driven Auxiliary Feedwater Pump Operability Test,Discovered CA Pump 1 Had Failed 850309 Operability Test.Caused by Personnel Error.Test Completed ‎ (← links)
  • 05000413/LER-1999-001-01, :on 990215,inoperable Refueling Water Storage Tank Level Channels Resulted in Operation Outside Design Basis.Caused by Inadequate Program Design.Reviewed Procedure & Communication Improvements Between Groups ‎ (← links)
  • 05000413/LER-1986-018, :on 860324,both Trains of Auxiliary Feedwater Sys Inoperable for Over 6 H.Caused by Personnel Error, Resulting in Removal of Train B from Svc While Train a Inoperable ‎ (← links)
  • 05000413/LER-1997-008-02, :on 971111,inadequate Solid State Protection Sys Surveillance Testing Occurred.Caused by Inadequate Test Design Supplied by Vendor.Surveillance Procedures for Solid State Protection Sys on Unit Revised ‎ (← links)
  • 05000413/LER-1986-032, :on 860616,steam Generator PORV Surveillance Interval Exceeded.Caused by Personnel Error.Steam Generator PORVs Tested & Periodic Test Program Revised to Include New Test Frequency ‎ (← links)
  • 05000413/LER-1986-020, :on 860310,both Trains of Turbine Trip on Reactor Trip circuitry,hi-hi Steam Generator Water Level & Safety Injection Circuits Inoperable.Caused by Blown Fuse & Loose Wire.Fuse Replaced.Wire Tightened ‎ (← links)
  • 05000413/LER-1986-028, :on 860606,unidentified RCS Leakage Exceeded Tech Spec Limit of 1 Gpm.Caused by Seal 2 Becoming Unseated. Reactor Coolant Drain Tank Level Transmitter Recalibr & Seal 2 Reseated ‎ (← links)
  • 05000413/LER-1986-014, :on 860312,periodic Surveillance Test to Exercise Control Rods Not Performed within Required Tech Spec Interval.Caused by Inadequate Procedure.Step 12.2 of Procedure PT/1/A/4600/01 Revised ‎ (← links)
  • 05000413/LER-1997-012, :on 971231,determined That TS 3.3.2 Violated in Past History of Plant Due to Method of Performing Incore Thermocouple & RTD Cross Calibrs.Caused by Inadequate Process for Identifying Commitments.Instructions Provided ‎ (← links)
  • 05000413/LER-1997-011-02, :on 971230,operators Indentified RCS Leak. Caused by Leakage Through Two Drain Valves,Tightly Closed. Leaking Valves Located & Closed ‎ (← links)
  • 05000413/LER-1997-007-03, :on 971023,TS 3.2.5 Was Inadequate for Reduced Flow Operation.Caused by Deficiency of Analysis.Ts Interpretation Was Issued That Prohibited Reduced Power Operation by TS Figure 3.2-1 ‎ (← links)
  • 05000413/LER-1997-010-02, :on 971229,reactor Trip Breakers Opened Due to Uncertainty of Rod Position.Caused by Failure of Detector/ Encoder Card in Data a Cabinet of Drpi Sys.Replaced Failed Detector/Encoder Card W/New Card ‎ (← links)
  • 05000413/LER-1998-018-01, :on 981214,identified That There No Single Procedure That Specifically Verified Response Time for Two SI RT Functions.Caused by Inadequate Procedures.Procedures Will Be Revised &/Or Developed.With ‎ (← links)
  • 05000413/LER-1986-027, :on 860519,automatic Nuclear Svc Water Sys Alignment to Standby Nuclear Svc Water Pond Actuated. Caused by Defective Procedures.Procedure Change 15 to Encls 13.12 & 13.14 of PT/2/A/4200/09A Begun ‎ (← links)
  • 05000413/LER-1997-009-01, Forwards LER 97-009-01 Re Unanalyzed Postulated Single Failure Affecting SG Tube Rupture Analysis.Event Considered to Be of No Significance W/Respect to Health & Safety of Public ‎ (← links)
  • 05000413/LER-1998-010-01, Forwards LER 98-010-01,re Pin Hole Leak in AFW Nozzle Tempering Line.Supplemental Rept Provides Results of Engineering Evaluation.Commitments Are in Planned C/A Section of LER ‎ (← links)
  • 05000413/LER-1986-022, :on 860419,reactor Tripped During Venting of High Pressure Line to RCS Loop C Flow Transmitter.Caused by Defective Procedures.Procedures IP/1/A/3222/15A,B & C Revised ‎ (← links)
  • 05000413/LER-1985-042, :on 850616,during Mode 1,nuclear Instrumentation High Flux Rate Power Range Reactor Trip Occurred.Cause Undetermined.Power Range Channels Reset. Equipment Realigned ‎ (← links)
  • 05000413/LER-1986-054, :on 860927,containment Purge (CP) Sys Inadvertently Tripped Twice.Cause Unknown.Cp Trip Reset Each Time & CP Reinitiated ‎ (← links)
  • 05000413/LER-1986-052, :on 860923,hourly Fire Watches Missed for Floor Hatches to Seal Water Injection 1A & 1B Filters.Caused by Personnel Error.Required Hourly Fire Watches Subsequently Performed & Incident Discussed W/Crew ‎ (← links)
  • 05000413/LER-1986-053, :on 860927,nuclear Svc Water Sys (Nsws) Automatically Aligned to Standby Nuclear Svc Water Pond Due to auto-start Signal for Nsws Pumps.Caused by Personnel Error.Nsws Sys Realigned & Personnel Counseled ‎ (← links)
  • 05000413/LER-1988-024-02, :on 881019,additions Made to Waste Gas Storage Tank W/O Tech Spec Required Analysis Due to Mgt Deficiency. Change to Correct & Clarify Waste Gas Operational Procedure Written ‎ (← links)
  • 05000413/LER-1988-003, :on 880116,wide Range Temp Monitoring Instrumentation Technically Inoperable.Caused by Installation Deficiency.Affected Unit 1 Resistance Temp Detector/Cables Replaced ‎ (← links)
  • 05000413/LER-1998-016, :on 981020,determined That Plant Was in Condition Outside Design Basis Due to Discovery of Missing Interlock.Caused by Failure to Coordinate Licensing Commitment.Licensee Will Install Interlock,Per UFSAR ‎ (← links)
  • 05000413/LER-1988-019, :on 880425,valid Failure of Diesel Generator 1A Occurred Due to Faulty Oil Pressure Sensor.Caused by Design, Mfg,Const/Installation Deficiency.Components Known or Suspected to Have Failed Replaced & Tested ‎ (← links)
  • 05000413/LER-1988-023-02, :on 881025,Trains a & B Control Room Ventilation Inoperable.Caused by Functional Design Deficiency of Cooling Water Flow Control Valve.Flow to Lube Oil Cooler Increased by Adjusting Valve ‎ (← links)
  • 05000413/LER-1987-045, :on 871018,Tech Spec Violation Due to Containment Purge Sys Being Inoperable.Caused by Personnel Error.Technicians Instructed That Use of Fused Jumpers Must Be Reviewed ‎ (← links)
  • 05000413/LER-1988-020, :on 880520,violation of Tech Spec Occurred When PORVs & Associated Block Valves Had Only One Position Indication Channel Per Valve.Caused by Mgt Deficiency.Tech Spec Interpretation Issued ‎ (← links)
  • 05000413/LER-1998-017, :on 981015,TS SR on Standby Shutdown Sys Instrumentation Was Missed.Caused by Inadequate Change Mgt Process.Calibrated Affected Resistance Temp Detectors & Modified Procedure.With ‎ (← links)
  • 05000413/LER-2020-002-01, Unacceptable Indication Identified During Reactor Pressure Vessel Head Nozzle Penetration Inspection ‎ (← links)
  • 05000413/LER-1988-022, :on 880811,discovered Failure to Retest Containment Isolation Valve Following Installation to Verify That Valve Properly Closed.Caused by Failure to Follow Appropriate Procedures.Training Initiated ‎ (← links)
  • 05000413/LER-1998-015-01, Forwards LER 98-015-01, TS Required Shutdown & Operation Prohibited by TS Associated with Ice Condenser. Rev 0 to Ler,Dtd 980902,contained Abstract Since Event Investigation Had Not Been Completed.Rev 1 Contains All 10CFR50. ‎ (← links)
  • 05000413/LER-1988-018, :on 880413,automatic Signal for Alignment of Nuclear Svc Water Sys Received.Caused by Personnel Error. Disciplinary Action Taken W/Technicians Performing Calibr Following Review of Event ‎ (← links)
  • 05000413/LER-1988-015, :on 880309,degraded Performance of Unit 1 Auxiliary Feedwater Sys & Required Hot Shutdown of Both Units Occurred After Unit 2 Tripped from 20% Full Power. Caused by Asiatic Clam Infestation ‎ (← links)
  • 05000413/LER-1986-007, :on 860121,during Unit Startup in Mode 2,main Feedwater Pump Turbine (Cfpt) 1A Tripped,Resulting in Automatic Start of motor-driven Auxiliary Feedwater Pump 1B. Caused by Low Vacuum in Condenser ‎ (← links)
  • 05000413/LER-1986-006, :on 860119,heater Drain Tank (C2HDT) Pump 1C2 Tripped While Unit Undergoing Turbine Acceptance Testing. Normal Bypass to Main Condenser Isolated,Causing Condensate to Back Up Into Moisture Reheater ‎ (← links)
  • 05000413/LER-1986-003-01, :on 860116,both Trains of Control Room Area Ventilation Sys Became Simultaneously Inoperable.Caused by Failure of Chilled Water Compressor Motor Temp Sensing Module.Chiller Repaired ‎ (← links)
  • 05000413/LER-1986-004, :on 860115,invalid Grab Samples Obtained.Caused by Introduction of Flush Water Over 4-day Period Due to Stuck Turbine Bldg Sump Radiation Monitor Flush Inlet Valve. on 851221,valve 1EMF Declared Inoperable ‎ (← links)
  • 05000413/LER-1998-012-01, Forwards LER 98-012-01 Re TS 3.0,3 Entry Due to Inoperability of Both Trains of CR Ventilation.Caused by Improper Sys Isolation.Only Commitments Identified in Rept, Listed Under Planned Corrective Actions Section ‎ (← links)
  • 05000413/LER-1986-001-01, :on 860106,discovered That Carbon Sample Not Taken from Control Room Pressurizing Filter A,Per Tech Spec Requirement.Cause Not Stated.Work Request Issued to Perform Carbon Sample Removal ‎ (← links)
  • 05000413/LER-1986-002, :on 860108,fire Protection Console Operator Failed to Detect Alarm on Fire Detection Sys for Auxiliary Bldg Fire Zone.Caused by Personnel Error.Security Procedure 221 for Monitoring Alarms Revised ‎ (← links)
  • 05000413/LER-1988-017, :on 880317,inadvertent Actuation of Reactor Trip Breaker Occurred.Caused by Personnel Error.Train a Power Range Trip Block Installed & Returned to Normal & Incident Reviewed W/Personnel Involved ‎ (← links)
  • 05000413/LER-1988-016-02, :on 880310,sliding Links on Safety Cabinets Left in Open Position Due to Possible Personnel Error. Sliding Links Returned to Correct Positions & All Other Safety Cabinets Inspected ‎ (← links)
  • 05000413/LER-1988-021-01, :on 880623,fire Protection Console Operator Erroneously Initiated Hourly Firewatch for Interior Doghouse.Caused by Inaccurate Info on Fire Protection Graphic Display.Firewatch Reestablished ‎ (← links)
  • 05000413/LER-1985-068, :on 851125,Trains a & B of Nuclear Svc Water Header Declared Inoperable.Caused by Setting of Torque Switches for Valves at Low End of Allowable Tolerance.Torque Settings Readjusted to Max Allowable Setting ‎ (← links)
  • 05000413/LER-1985-066, :on 851119,Train B of Hydrogen Skimmer Sys Inoperable.Caused by Overlooked Work Request to Repair Damper Between Upper & Lower Containment.Review of 1.47 Bypass Panel Included in Operations Checklists ‎ (← links)
  • 05000413/LER-1988-014, :on 880113,electricians Improperly Installed Telephone in Auxiliary Feedwater Pump Turbine Control Panel Room Rendering Firewall Inoperable.Caused by Mgt Deficiency. Penetration Properly Sealed ‎ (← links)
  • 05000413/LER-1988-012, :on 880208,waste Gas Decay Tank Contents Inadvertently Released to Environ Due to Leak Following Maint.Caused by Personnel Error.Leak Identified,Isolated & Repaired.Personnel Counseled ‎ (← links)
  • 05000413/LER-1987-044, :on 871201,diesel Generator Declared Inoperable After Tripping During ESF Periodic Test.Caused by Mgt Deficiency for Removing Train a from Svc While Train B Had No Emergency Power.Power Supplies Swapped ‎ (← links)
  • 05000413/LER-1988-009, :on 880206,Limitorque Valve Actuator T-drains Found Painted Over or Missing on 27 Valves.Caused by Lack of Communication & Mgt Deficiency.Painters Will Receive Periodic Retraining.Drains Repaired ‎ (← links)
  • 05000413/LER-1997-005-01, :on 970623,violation of TS 4.0.5 Was Determined.Caused by Inadequate Surveillance Procedure. Affected Check Valves Were Successfully Tested for Reverse Flow Prevention ‎ (← links)
  • 05000413/LER-1988-004, :on 880116,control Power Fuse Failed in Intermediate Range Channel N36,causing Low Power High Flux Reactor Trip Bistable to Actuate.Caused by Failure of Fuse. Signal Reset.Shutdown Procedure Revised ‎ (← links)
  • 05000413/LER-1988-001-02, :on 880112 & 18,hourly Fire Watches Not Performed for Room 107.Caused by Personnel Error & Mgt Deficiencies.Personnel Counseled & Hourly Fire Watches Resumed ‎ (← links)
  • 05000413/LER-1987-043, :on 871105,RCS Monitoring Instrumentation Declared Inoperable.Caused by Design Deficiency.Unit 1 Resistance Temp Detector Junction Boxes Sealed by Filling Epoxy.Unit 2 Boxes Will Be Sealed or Replaced ‎ (← links)
  • 05000413/LER-1987-047, :on 871221,reactor Trip Signal Occurred Due to Steam Generator lo-lo Level.Cause Unknown.Operator Update Issued to Assure All Licensed Operators Aware of Procedure for Equalizing Pressure Across MSIVs ‎ (← links)
  • 05000413/LER-1987-046, :on 871219,main Feedwater CF Isolation Occurred During Removal of Temporary Station Mod (Tsm) from Solid State Protection Sys.Caused by Mgt Deficiency.Tsm Removed & CF Sys Returned to Alignment ‎ (← links)
  • 05000413/LER-1988-013, :on 880229,containment Spray Sys Taken Out of Svc for Maint Purposes & Declared Inoperable.On 880301 Both Trains Out of Svc in Violation of Tech Specs.Caused by Mgt Deficiency.Event Reviewed W/Involved Personnel ‎ (← links)
  • 05000413/LER-1997-002-04, :on 970403,determined That Feedwater Containment Isolation Valve Was Inoperable.Caused by Inadequate Info.Nitrogen Pressure Was Restored & Oac Alarm Response Has Been Revised ‎ (← links)
  • 05000413/LER-1988-010, :on 880211,unmonitored Release of Liquid Radwaste Into Environ Occurred.Caused by Personnel Error in Not Adequately Reviewing Info Before Starting Release. Incident Discussed W/Involved Personnel ‎ (← links)
  • 05000413/LER-1988-011, :on 880126,nuts Received W/O Proper Charpy Impact Testing Documentation.Caused by Mfg Deficiency & Personnel Error.Incident Reviewed W/General Ofc QA Personnel.Nuts Tested Per NRC Bulletin 87-002 ‎ (← links)
  • 05000413/LER-1988-008, :on 880125,one Train of Control Room Ventilation Sys Declared Inoperable.Caused by Personnel Error in Improper Planning of Work Request.Filters Adjusted to Proper Position & Filter Train Retested ‎ (← links)
  • 05000413/LER-1988-005, :on 880120,discovered That Cold Leg Accumulator (Cla) Discharge Isolation Valves Motor Operators Contained Terminal Blocks Not Qualified for Use in Containment.Cla Isolation Valves Declared Inoperable ‎ (← links)
  • 05000413/LER-1988-007, :on 880123,safety Injection Actuated Due to Low Steam Line Pressure.Caused by Personnel Error.Control Room Senior Reactor Operator Functions Will Be Reviewed & Revised If Necessary ‎ (← links)
  • 05000413/LER-1988-006, :on 880122,unplanned Swap of Nuclear Svc Water (Rn) Sys to Standby Nuclear Svc Water Pond Occurred.Caused by Mgt Deficiency.Ground on Affected Conductors Cleared & Rn Sys Realigned to Rn Pits ‎ (← links)
  • 05000413/LER-1986-010, :on 860118,discovered That Alternate Power Sources Not Verified Operable While Diesel Generator 1B Inoperable.Caused by Personnel Error.Diesel Generator Annunciator Response Procedure Revised ‎ (← links)
  • 05000413/LER-1984-003, :on 840729,CRD Assemblies Removed by Using Reactor Bldg 25-ton Crane Instead of Manipulator Crane. Caused by Personnel Error.Job Halted & Procedure Written Re Installation of Two New CRD Assemblies ‎ (← links)
  • 05000413/LER-1986-016, :on 860317,surveillance Time Interval for Penetration Bellows Integrity Test Exceeded.Caused by Misunderstanding of Applicability of Grace Period & Human Error.Procedures Corrected ‎ (← links)
  • 05000413/LER-1997-004-02, :on 970514,inadequate Surveillance Determined. Caused by Interpretation of Conflicting TS Requirements. Station Procedures Revised to Ensure TS Surveillance 4.5.3.2 Is Met ‎ (← links)
  • 05000413/LER-1986-013, :on 860314,ESF Actuation Occurred Upon Containment Gas Monitor 1EMF-39L Alarm.Radiation Monitor Alarm Determined to Be Spurious.Setpoint Alarm Reset. Procedure HP/0/B/1004/05 Revised ‎ (← links)
  • 05000413/LER-1997-003-04, :on 970515,AFW Sys Was Found Outside of Design Basis.Caused by Unanticipated Interaction of Systems or Components.Cacst Was Isolated Pending Further Evaluation on 970515 ‎ (← links)
  • 05000413/LER-1984-028-02, :on 841205,breaker 1ETA-3 Tripped Open Initiating ESF Actuation & Causing Bus 1ETA to Load Shed, Breaker 1EATA-18 to Close & All Blackout Load Groups to Energize.Cause Unknown ‎ (← links)
  • 05000413/LER-1986-011, :on 860214,annulus Ventilation Sys Rendered Inoperable When Annulus Door Propped Open to Support Maint Activity.Caused by Personnel Unfamiliarity W/Requirements of Security Procedures ‎ (← links)
  • 05000413/LER-1985-058, :on 851008,hourly Fire Watches for Nine Fire Detection Zones Performed Approx 30 Minutes Late.Caused by Lack of Formalized Program to Document Post Assignments or Changes in Assignments.Patrols Performed ‎ (← links)
  • 05000413/LER-1985-065, :on 851115,motor-driven Auxiliary Feedwater Pumps auto-started Following Main Feedwater Pump Turbine Trip.Caused by Defective Reactor Trip Breaker Test Procedure.Procedures Revised ‎ (← links)
  • 05000413/LER-1985-057, :on 850924,comparison of Digital Rod Position to Demand Rod Position Not Performed.Caused by Alarm Malfunction & Personnel Error.Measured Rod Position Verified & 13 Circuit Cards Replaced in Computer ‎ (← links)
  • 05000413/LER-1985-055, :on 850919,backup Fire Hose for Auxiliary Bldg Hose Station Removed While Permanent Hose Station Still Inoperable.Caused by Procedural Deficiency.Wye Connection & Backup Hose Reinstalled ‎ (← links)
  • 05000413/LER-1985-063, :on 851107,auxiliary Feedwater Pump Room Fire Alarm Actuated W/O Sounding.Caused by Alarm Points Not Being Scanned by Central Processing Unit.Initial Cause Not Determined.Points Reentered Into Scan Program ‎ (← links)
  • 05000413/LER-1985-064, :on 851107,required Fire Watches for Two Fire Zones W/Inoperable Fire Detection Equipment & Fire Barriers Not Performed within Specified Time Limit.Caused by Personnel Error & Mgt Deficiency ‎ (← links)
  • 05000413/LER-1985-062, :on 851104-05,continuous Fire Watch Not Conducted on Diesel Generator 1B While Low Pressure Cardox Fire Protection Sys Disabled.Caused by Miscommunication Between Security & Maint Personnel ‎ (← links)
  • 05000413/LER-1985-061, :on 851018,unit Shut Down Due to Excessive Unidentified Reactor Coolant Leakage.Caused by Component Failures.Leaking Valves Repaired & Bolts on Neutron Controller Pump Main Flange Retightened ‎ (← links)
  • 05000413/LER-1985-051, :on 850816,inadvertent Blackout of Train B Occurred During Diesel Generator Operability Test.Caused by Personnel Pressing Wrong Breaker Control Pushbutton. Sequencer 1B Reset ‎ (← links)
  • 05000413/LER-1985-072, :on 851226,hourly Firewatch for Diesel Generator Room 1B & Auxiliary Feedwater Pump Room Posted 21 & 2 Minutes Late,Respectively.Caused by Malfunctioning Computer Sys Multiplexer.Procedures Written ‎ (← links)
  • 05000413/LER-1985-071, :on 851220,reactor Trip Occurred.Caused by Equipment Malfunction.Work Request Initiated to Investigate & Repair Steam Generator Feedwater Control Valve 1CF28 ‎ (← links)
  • 05000413/LER-1985-070, :on 851217,hourly Fire Watch for Diesel Generator Room 1B Performed 51 Minutes Late While Carbon Dioxide Sys out-of-svc.Caused by Malfunction in Computer Controlling Computer Access Door Keys ‎ (← links)
  • 05000413/LER-1985-046, :on 850723,fire Barrier Penetration C-AX-228-W-9 Determined Inoperable.Caused by Unsealed Installation of Two Temporary Cables Penetrating Fire Barriers.Cables Removed & Barrier Resealed ‎ (← links)
  • 05000413/LER-1985-045-01, :on 850710,during 18-month Surveillance Calibrs,Reactor Trip Occurred on lo-lo Steam Generator. Caused by Personnel Error.Technician in Field Will Be Provided Documentation ‎ (← links)
  • 05000413/LER-1997-001-02, :on 970210,unanalyzed Postulated Single Failure Affected SG Tube Rupture Analysis.Caused by Less than Adequate Single Failure Analysis of SG Porv.Proposed Amend to TS 3/4.7.1.6 & UFSAR Has Been Submitted ‎ (← links)
  • 05000413/LER-1985-069, :on 851128,w/diesel Generator 1A Inoperable, Availability of Offsite Power Sources Not Verified.Caused by Personnel Error.Availability Verified Per PT/1/A/4350/02C & Incident Discussed W/Personnel ‎ (← links)
  • 05000413/LER-1985-050, :on 850807,both Discharge Headers of Fire Protection Pumps Isolated.Caused by Personnel Error.Ry Header Unisolated & Accountable Engineer Changed Chlorination Loop Designations on Flow Diagram ‎ (← links)
  • 05000413/LER-1985-049-01, :on 850807,inadvertent Isolation of Both Discharge Headers of Fire Protection (Ry) Pumps Occurred. Caused by Personnel Error.Correct Ry Header Isolated. Procedure 2-18 Revised ‎ (← links)
  • 05000413/LER-1985-047, :on 850729,response Time Testing for Auxiliary Feedwater (CA) Transfer of Suction Source to Nuclear Svc Water Improperly Performed.Caused by Procedural Deficiency. Procedural Changes Effected ‎ (← links)
  • 05000413/LER-1985-048, :on 850729,actuation of Control Room Ventilation Sys Train B Occurred.Caused by Personnel Error. Control Room Filter Fan Shut Down & Pressure Stabilized. Undervoltage Relays & Sequencer Retested ‎ (← links)
  • 05000413/LER-1985-049, :on 850731,motor Driven Auxiliary Feedwater (CA) Pumps auto-started Due to Main Feedwater (CF) Pump Trip.Caused by Slow Response of Valves 1CF6 & 1CF13. Procedures Revised & Pump Restarted ‎ (← links)
  • 05000413/LER-2020-001-01, Valid Actuation of the Unit 1 Reactor Protection System and Auxiliary Feedwater System ‎ (← links)
  • 05000413/LER-1996-014, :on 961230,solid State Protection Sys Train B Relay K616 Properly Actuated,Failed to Latch in Tripped Position During Periodic Main Steam Line Isolation Testing. Caused by Equipment failure.K616 Replaced ‎ (← links)
  • 05000413/LER-1985-045, :on 850710,reactor Trip Occurred on lo-lo Steam Generator Level.Incorrect Main Steam Pressure Transmitter Isolated During Surveillance Calibrs.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1996-012, :on 961211,auxiliary Feedwater Sys Found Outside Design Basis Occurred.Caused by Initial Design Oversight.Minor Mods Were Completed to Add Check Valves to Each Unit ‎ (← links)
  • 05000413/LER-1985-056, :on 850924,during Health Physics Biological Shield Survey,Radiation Streaming Discovered Coming Through Many Electrical Penetrations in Reactor Bldg.Caused by Failure to Analyze Path in Shielding Analysis ‎ (← links)
  • 05000413/LER-1996-013, :on 961218,TS 3.4.6.1 Violation Occurred Due to an Error in Replacement Operator Aid Computer Programming.Computer Points Were Added to Replacement Oac & an Alarm Response Was Developed ‎ (← links)
  • 05000413/LER-1985-022, :on 850314,diesel Generator 1B Inoperable Due to Loss of Dc Control Power.Caused by Component Malfunction, Procedural Deficiency & Personnel Error.Control Power on Socket Repaired & Light Bulb Replaced ‎ (← links)
  • 05000413/LER-1996-011, :on 961210,cross Channel Check Comparison of Loops a & B W/Loops C & D Showed Setpoint Readings for All 4 Loops Were Incorrect.Caused by Slight Increase in Test Lead Resistance.Loops a & B Recalibrated ‎ (← links)
  • 05000413/LER-1985-054, :on 850906,08,11 & 17,containment Noble Gas & Iodine Radiation Monitors EMF39 & EMF40 Tripped.Caused by Increased Containment Activity Due to Fuel Rod Cladding Leaks.Monitor Setpoints Revised ‎ (← links)
  • 05000413/LER-1985-044, :on 850622,steam Generator lo-lo Level Reactor Trip Occurred.Caused by Main Feedwater Pump Turbine Speed Increasing W/O Proper Mode Due to Miscommunication.Sys Affected Returned to Normal Alignment ‎ (← links)
  • 05000413/LER-1985-035, :on 850528,motor Driven Auxiliary Feedwater CA Pumps Automatically Started Due to Low Suction Flow Trip of Both Main Feedwater CF Pumps.Caused by Personnel Error.Cf Pump Reset & Motor Driven CA Pumps Secured ‎ (← links)
  • 05000413/LER-1985-043, :on 850622,manual Reactor Shutdown Initiated Following Automatic Trip of Main Feedwater Pump Turbine 1B Due to Loss of Condenser Vacuum.Caused by Personnel Error. Incident Discussed W/Personnel ‎ (← links)
  • 05000413/LER-1985-036, :on 850510,level Instrumentation for Upper Head Injection Sys Water Accumulator Tank Calibr Incorrectly. Caused by Procedural Deficiency.Instruments Recalibr to Correct Setpoint ‎ (← links)
  • 05000413/LER-1985-040, :on 850605,operability of Remaining Alternate Power Sources Not Demonstrated within 1 H of Declaring Diesel Generator 1A Inoperable.Caused by Personnel Error. Incident Discussed W/Personnel ‎ (← links)
  • 05000413/LER-1996-010, :on 961107,TS Surveillance for VY Sys Containment Isolation Valves Was Missed.Caused by Inadequate Verification of Pertinent Info During Implementation of Periodic Testing Program.Tested Valves ‎ (← links)
  • 05000413/LER-1996-009-02, :on 960930,use of Inadequate Reactor Coolant Controlled Leakage Test Occurred.Caused by Omission of Relevant TS Bases Info.Revised Procedures for Performing Reactor Coolant Sys Controlled Leakage Test ‎ (← links)
  • 05000413/LER-1985-028, :on 850422,both RHR Trains Inoperable & RCS Draining Began While Train a Inoperable Due to Maint.Caused by Personnel Error.Centrifugal Charging Pump a Started to Restore PCS Sys Level ‎ (← links)
  • 05000413/LER-1996-008-01, :on 950307,closure Response Time Was Exceeded for MSIV 1SM1,B Train.Caused by Spurious Failures of B Train Exhaust Solenoid Valve for 1SM1.Valves Used in Pnuematic Controls for Unit 1 Have Been Replaced ‎ (← links)
  • 05000413/LER-1985-039, :on 850523,spacers Required for Seismic Qualification of Channel 2 Vital Battery Bank 1EBB Not Reinstalled After Cells of Bank Replaced.Caused by Personnel Error.Spacers Replaced ‎ (← links)
  • 05000413/LER-1985-027, :on 850428,diesel Generator 1B Started on Blackout Signal.Caused by Short Circuit in Indicating Light Socket.Switchgears Closed ‎ (← links)
  • 05000413/LER-1985-029, :on 850423,determined That End Stringer Clearance in Vital Instrumentation & Control Power Sys Exceeded Limits.Caused by Incorrect Mfg Installation Drawings.Styrofoam Spacers Installed ‎ (← links)
  • 05000413/LER-1985-038, :on 850110,valve Stroke Time Test Not Performed After Steam Leak Repair.Caused by Personnel Error.Stroke Time Test Performed & Personnel Retrained ‎ (← links)
  • 05000413/LER-1985-041, :on 850613,main Feedwater Pump Trip Resulted in Manual Reactor Trip.Caused by Pump Recirculation Valve Not Capable of Modulating Quickly During Flow Reduction.Design Deficiency Corrected ‎ (← links)
  • 05000413/LER-1985-026, :on 850422,during Testing of Nuclear Svc Water Flow Balance,Sys Aligned to Standby Nuclear Svc Water Pond on Pumphouse Pit B l0-l0 Level.Caused by Low Setting of Torque Switch for Valve 1RN4B ‎ (← links)
  • 05000413/LER-1992-013, :on 921203,TS 3.0.3 Entered Due to Both Trains of CR Area Ventilation & Chiller Water Sys Being Inoperable. Chiller B Guide Vane Actuator Pump Replaced W/Previously Installed Actuator ‎ (← links)
  • 05000413/LER-1985-025, :on 850415,reactor Trip Occurred Due to lo-lo Level Signal from Steam Generator A.Caused by Administrative Error.Procedure Change Made to Require Notification of Flow Mismatches ‎ (← links)
  • 05000413/LER-1985-024, :on 850409,Train B of Ventilation/Chilled Water Sys Became Inoperable Due to Failure of Filter Unit Preheater to Energize.On 850412,both Trains of Same Sys Inoperable for Several Hours ‎ (← links)
  • 05000413/LER-1992-010, :on 920820,emergency Low Level Signal for Nuclear Svc Water Sys Intake Pit B Initiated Automatic Swap to Svc Water Pond.Possibly Caused by Design Deficiency.Pump Secured,Valve Opened & Sys Realigned ‎ (← links)
  • 05000413/LER-1985-017, :on 850306,turbine Driven Auxiliary Feedwater Pump Automatically Started Due to Wide Range Level Instrumentation Sensing lo-lo Levels in Steam Generators. Caused by Design Deficiency ‎ (← links)
  • 05000413/LER-1985-037, :on 850529,auxiliary Feedwater (CA) Pump 1A Inadvertently Started During Periodic Test.Caused by Procedural Deficiency.Ca Pump 1A Secured.Procedure Changes Made ‎ (← links)
  • 05000413/LER-1984-017, :on 841012,motor Driven Auxiliary Feedwater Pumps 1A & 1B Started Due to Emergency Low Suction Flow Signal from Both Main Feedwater Pumps.Caused by Inability of Valve to Compensate for Flow Transient ‎ (← links)
  • 05000413/LER-1992-013-01, :on 921203,TS 3.0.3 Entered When Both Train a & B of CR Area Ventilation & Chilled Water Sys Declared Inoperable on 921130 & 1203,respectively.Caused by Chiller Guide Vane Actuator Failure.Actuator Replaced ‎ (← links)
  • 05000413/LER-1985-034, :on 850515,diesel Generators 1A & 1B Experienced Invalid Automatic Start Following Detection of Undervoltage Condition on Essential Switchgear.Caused by Transmission Sys Disturbance ‎ (← links)
  • 05000413/LER-1985-033, :on 850513 & 14,steam Generator hi-hi & lo-lo Signals initiated,respectively.Hi-hi Signal Caused by Personnel Error.Cause of lo-lo Signal Unknown.Cf Isolation Signal Reset & lo-lo Signal Cleared ‎ (← links)
  • 05000413/LER-1985-032, :on 850512,nuclear Svc Water Sys (Rn) Automatically Swapped to Standby Nuclear Svc Water Pond & Idle Rn Pumps Started Due to False lo-lo Level Signal in Rn Pumphouse Pit B.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1985-031, :on 850511,nuclear Svc Water Sys Automatically Swapped to Standby Nuclear Svc Water Pond & All Idle Pumps Started.Caused by False lo-lo Level Signals in Pumphouse Pit B.Affected Valves Realigned ‎ (← links)
  • 05000413/LER-1992-012-01, :on 921201,02 & 08,auxiliary Feedwater Sys turbine-driven Pumps Declared Inoperable.Caused by Unanticipated Interaction of Sys or Components During Design Analysis.Permanent Mod to Sys Installed ‎ (← links)
  • 05000413/LER-1985-030, :on 850509,nuclear Svc Water Sys Automatically Aligned to Standby Nuclear Svc Water Pond & All Idle Sys Pumps Started Due to False lo-lo Level Signal in Sys Pumphouse Pit B.Caused by Loss of Voltage ‎ (← links)
  • 05000413/LER-1984-032, :on 841219,seven Inoperable Fire Barrier Penetrations Discovered.Caused by Failure to Follow Procedures During Cable Pulling Activities.Penetrations Resealed.Personnel Will Be Retrained ‎ (← links)
  • 05000413/LER-1992-011-01, :on 920830,unexpected ESF Actuation Occurred, Resulting in Auxiliary Feedwater Sys Autostart When DG Load Sequencer 1B Reset.Caused by Use of Defective Procedure. Train B Reset & SG Blowdown Realigned ‎ (← links)
  • 05000413/LER-1996-003-06, :on 960802,TS 3.0.3 Required Shutdown Initiated,Due to Ventilation Sys Motor Failures.Unit 2 Was Shutdown to MOD 5 Per Requirements of TS 3.0.3.Damaged Motors Were Replaced ‎ (← links)
  • 05000413/LER-1985-013, :on 850220,discovered Conduits Penetrating Fire Barriers W/O Ends Sealed for Fire Protection.Caused by Personnel Error & Procedure Deficiency.Training Provided to Personnel & Procedures Revised ‎ (← links)
  • 05000413/LER-1985-023, :on 850329,reactor Power Exceeded 75% W/Only Two of Three Test Runs for Reactor Coolant Sys Performed. Caused by Software Problem.Thermal Output Calculations Program Modified,Reassembled & Reimplemented ‎ (← links)
  • 05000413/LER-1996-007-01, :on 960718,discovered MSSV Lift Setpoint Drift. Caused by Unanticipated Interaction of Components.Adjusted & Retested Valves & Submitted Application to Amend TS to Change Tolerance to Plus or Minus 3 Percent ‎ (← links)
  • 05000413/LER-1996-006-01, :on 960509,discovered Containment Floor and Equipment Sump Level Monitoring Inaccuracy.Caused by Inadequate Design Analysis.Added Water to Sumps to Ensure Sump Level Remains in Calibr Range ‎ (← links)
  • 05000413/LER-1996-005-01, :on 960613,automatic Reactor Trip Occurred. Caused by Failed Capacitor.Replaced & Tested Failed Capacitor ‎ (← links)
  • 05000413/LER-1984-032-01, :on 841219,spot Insp Revealed Seven Inoperable Fire Barrier Penetrations.Probably Caused by Personnel Error in Failing to Reseal Penetrations After Cable Pulling. Penetrations Resealed & Personnel Retrained ‎ (← links)
  • 05000413/LER-1992-009-02, :on 920722,turbine Bldg Sump Sys Pipe Rupture Occurred.Caused by Inoperable Turbine Bldg Sump Radiation Monitor.Grab Sample Obtained from Sump & Analyzed & Flow from Temporary Pumps Terminated ‎ (← links)
  • 05000413/LER-1992-008-01, :on 920712,unexpected ESF Actuation Occurred & Lube Oil Pump 1A1 Tripped as Pump 1A2 Being Stopped.Caused by Possible Equipment Malfunction.Addl Testing on Motor Control Ctr Circuitry Will Be Performed ‎ (← links)
  • 05000413/LER-1984-031-01, :on 841216,diesel Generator 1B Started on Blackout Signal.Caused by Design Deficiency Allowing Detection of Undervoltage Condition Before Tie Breaker Closes.Bus 1TB Breakers Realigned ‎ (← links)
  • 05000413/LER-1985-016, :on 850302,while in Mode 1 at 30% Power,Three Power Range High Overpower Trip Circuits Calibr to 109% Power.Caused by Personnel Error.Circuits Recalibr ‎ (← links)
  • 05000413/LER-1985-015, :on 850302,breakers Not Locked in Off Position on Certain Safety Injection & Auxiliary Feedwater Pump Motors.Caused by Administrative Deficiency & Personnel Error.Procedure Revised ‎ (← links)
  • 05000413/LER-1985-014, :on 850222,stainless Steel Valves Discovered Installed W/Carbon Steel Filler Matl.Caused by Const Isometrics Incorrectly Specifying Matls Which Led to Use of Incorrect Welding Procedure ‎ (← links)
  • 05000413/LER-1996-004-01, :on 960506,standby Shutdown Sys Found Outside Design Basis.Caused by Misinterpretation of Info.Changed Design Basis Document Based on Corrected Calculations & Implemented Mod to Ensure Water Availability ‎ (← links)
  • 05000413/LER-1996-003-01, :on 960508,Control Rod Bank a Group 1 Failed to Withdraw from Inserted Test Position of 219 Steps.Caused by Failed Firing Card.Unit Shutdown to Mode 3 & Failed Firing Card Replaced W/Spare Firing Card ‎ (← links)
  • 05000413/LER-1996-002-04, :on 960503,TS 3.0.3 Entered Due to Inconclusive Surveillance Testing.Caused by Ommission of Relevant Info & Inadequate Training.Reviewed Test Procedures & Trained Personnel Re Multimeter Use ‎ (← links)
  • 05000413/LER-1984-024-02, :on 841124,auxiliary Feedwater Pumps 1A & 1B Started Due to lo-lo Level in Steam Generator 1C.Caused by Personnel Deviating from Procedure.Steam Generator Level Restored & Alarm Cleared ‎ (← links)
  • 05000413/LER-1984-030-02, :on 841129,containment Penetration Leak Rate Test Performed Improperly.Caused by Penetration Piping Being Completely Drained.Procedures Revised ‎ (← links)
  • 05000413/LER-1984-029-02, :on 841206,Westinghouse Notified Util of Insp Results Re CRD Mechanism Design.During 841215 Insp of All Unit 1 Drive rods,14 Unacceptable Drive Rods Found.Rods Replaced & Returned to Westinghouse ‎ (← links)
  • 05000413/LER-1985-012, :on 850209,low Steam Line Pressure Signal Caused Safety Injection & Reactor Trip.Caused by Loss of Voltage on Power Panelboard of Vital Instrumentation & Control Power Sys.Emergency Procedures Used ‎ (← links)
  • 05000413/LER-1985-010, :on 850201,negative Flux Rate Setpoint Outside Design Analyses Assumptions.Caused by Inconsistent Interpretations of Setpoint.Bistable Setpoint Reduced to 2.5% Rated Thermal Power ‎ (← links)
  • 05000413/LER-1985-009, :on 850131,during Loss of Control Room Functional Test,Safety Injection Occurred.Caused by Component Malfunction.Safety Injection Reset,Closing Cold Leg Safety Injection Valve ‎ (← links)
  • 05000413/LER-1984-025-03, :on 841127,motor Driven Auxiliary Feedwater Pumps Started After Loss of Main Feedwater Pumps When Reactor Trip Breakers Opened to Support Rod Drop Timing Test.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1984-023-01, :on 841119,motor Driven Auxiliary Feedwater Pumps 1A & 1B Started Due to Emergency Low Suction Flow Signal from Both Main Feedwater Pumps.Caused by Administrative/Procedural Deficiency ‎ (← links)
  • 05000413/LER-1984-027-01, :on 841126,RCS Boron Concentration Decreased to Less than 2,000 Parts Per Million.Cause Unknown.Boric Acid Added to Bring Level Above 2,000 Part Per Million ‎ (← links)
  • 05000413/LER-1984-026-01, :on 841130,fire Watch Not Performed on Certain Fire Zones W/Inoperable Fire Detectors.Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000413/LER-1985-007, :on 850122,diesel Generators 1A & 1B Started on Blackout Signal.During Troubleshooting on Circuit Breaker 1B,Zone B Lockout Initiated,Causing Trip of 6,900-volt Switchgear.Caused by Design Deficiency ‎ (← links)
  • 05000413/LER-1985-008, :on 850123,reactor Automatically Tripped Due to Steam Generator D lo-lo Level.Caused by Decrease in Auxiliary Steam Flow.Investigation to Be Conducted Re Transmitter Output Tubing Blockage ‎ (← links)
  • 05000413/LER-1985-006, :on 850120,hot Standby Initiated After Reactor Coolant Average Temp Could Not Be Increased to Greater than 541 F 15 Minutes After Temp Decrease During Performance of Natural Circulation Verification Test ‎ (← links)
  • 05000413/LER-1984-013-02, :on 840923,radiation Monitor Override Switch on Turbine Bldg Sump Pump Panel Found to Be in Reset Position.Cause Unknown.Radiation Monitor Override Switch Returned to Off Position ‎ (← links)
  • 05000413/LER-1985-005, :on 850117,during Review of Tech Spec Action Item Log,Discovered Five Occurences When Unit Entered Mode 2 W/Power Range Neutron Monitor Inoperable.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1985-004, :on 850114,due to Loss of Reactor Coolant Pump Motor Cooling Water,Reactor Manually Tripped.Caused by Malfunction of Valve 1RN-A83.Valve Opened Manually ‎ (← links)
  • 05000413/LER-1985-003, :on 850109,during Monthly Testing of Solid State Protection Sys,Reactor Trip Breaker Opened on High Flux Source Range Reactor Trip Signal.Caused by Procedural Deficiency.Procedure Revised ‎ (← links)
  • 05000413/LER-1985-002, :on 841231,unit Entered Hot Shutdown W/Ice Condenser Lower Inlet Doors Blocked Closed.Incident Discovered on 850109.Caused by Personnel Error.Blocking Devices Removed & Training Sessions Held ‎ (← links)
  • 05000413/LER-1984-012-02, :on 840908,differential Pressure at Full Flow Acceptance Criteria for RHR Nd Pump La Not Met & Pump Erroneously Declared Operable.Error Discovered on 840917. Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1985-001, :on 850104,during Testing of Turbine Impulse Chamber Pressure,Motor Driven Auxiliary Feedwater Pumps 1A & 1B auto-started,initiating Reactor Trip Signal.Caused by Personnel Error.Procedure Reviewed ‎ (← links)
  • 05000413/LER-2020-001, Valid Actuation of the Unit 1 Reactor Protection System and Auxiliary Feedwater System ‎ (← links)
  • 05000413/LER-1984-021-02, :on 841114,feedwater Isolation Experienced Due to Steam Generator hi-hi Level Signal.Caused by out-of-svc Sticker Placed on Channel Select Switch for Steam Generator C.Controls Returned to Normal ‎ (← links)
  • 05000413/LER-1984-022, :on 841115,emergency Core Cooling Flowpath Inoperable.Caused by Personnel Error.Locks Installed on Containment Sump Intake Screen Doors.Key to Locks Will Be Administratively Controlled ‎ (← links)
  • 05000413/LER-1992-006-01, :on 920429,particulate Activity Monitors Declared Inoperable Due to Technical Deficiency in Procedure.Calibr Procedure Revised & Particulate Activity Monitors Recalibr ‎ (← links)
  • 05000413/LER-1984-020-02, :on 841112,0928 & 1020,Mode 4 Entered W/ Unacceptable Test Results on Certain Fuses Associated W/ Containment Electrical Penetrations.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1984-019-02, :841108,closed Inlet Valve to Vent Sampling Pump Prevented Continuous Sampling.Caused by Personnel Error.Inlet & Outlet Valves Locked Open ‎ (← links)
  • 05000413/LER-1984-017-03, :on 841012,motor Driven Auxiliary Feedwater Pumps Started.Caused by Emergency Low Suction Flow Signal from Both Main Pumps Due to Design Deficiency in Valve. Steam Flow Reestablished ‎ (← links)
  • 05000413/LER-1985-019, :on 850307,during Performance of Analog Channel Operational Test,Steam Generator C Level Channel 4 Found Inoperable.Caused by Personnel Error.Circuit Card Replaced ‎ (← links)
  • 05000413/LER-1985-018, :on 850307,Train a Diesel Generator & Turbine Driven Auxiliary Feedwater Pump Concurrently Inoperable. Caused by Personnel Error Placing Batteries on Equalize Charge.Batteries Returned to Svc ‎ (← links)
  • 05000413/LER-1985-011, :on 850207,safety Injection Trains a & B Inoperable.Caused by Personnel Error.Pump 1B Returned to Svc & Operator Update Issued Addressing Impact of Solid State Protection Sys Inoperability ‎ (← links)
  • 05000413/LER-1984-018-02, :on 841023,in-core Thermocouple Tube Leakage Occurred.Caused by Separation of Stainless Steel Conduit from Swagelok Tube Fitting.Thermocouple Replaced ‎ (← links)
  • 05000413/LER-1984-017-02, :on 841021,motor Driven Auxiliary Feedwater Pumps 1A & 1B Started Due to Trip Signal on Both Maint Feedwater Pump Turbines.Cause Unknown.Followup Rept by 841201 ‎ (← links)
  • 05000413/LER-1984-015-02, :on 840928,unit Entered Hot Shutdown W/O Testing Leak Rate of Refueling Water Containment Isolation Valve.Caused by Personnel Error.Valve Tested ‎ (← links)
  • 05000413/LER-1984-016-01, :on 841018,while in Cold Shutdown,Power Interrupted to Vent Sampling Pump.Caused by Tripped Circuit Breaker That Supplies Power to Pump Electrical Outlet. Circuit Breaker Reclosed ‎ (← links)
  • 05000413/LER-1984-014-02, :on 841011,component Cooling Water Sys Found to Have Potential for Overpressurization Should Tubing Failure Occur in Reactor Coolant Pump Thermal Barrier Hx.Surge Tanks Provided ‎ (← links)
  • 05000413/LER-1992-007-01, :on 920703,discovered That Previous 72 H Leak Rate Test Had Not Been Performed on Air Lock Per Ts.Caused by Lack of Communication.Operations Support Group Trained Re Communications of Turnover Responsibility ‎ (← links)
  • 05000413/LER-1984-009, :on 840827,sample Flow Not Obtained from RHR Sys Train A.Caused by Possible Failure of Valve 1NM39. Sampling Location Changed to Vol Control Tank.Work Request Written to Investigate & Repair Valve ‎ (← links)
  • 05000413/LER-1984-008-02, :840822,various ESF Valves Repositioned to Safety Positions.Caused by Inadvertent Actuation of Relay K603 of Train a Solid State Protection Sys ‎ (← links)
  • 05000413/LER-1984-007-03, :on 840803,w/composite Sampler on Conventional Waste Water Treatment Sys inoperable,769,000 Gallon Release Made W/O Grab Sample.Caused by Personnel Error.Chemistry & Health Physics Procedures Revised ‎ (← links)
  • 05000413/LER-1984-006-02, :on 840806,boron Sampling from Nonoperational Train B of RHR Nd Sys Did Not Provide Representative Sample of Boron Concentration of Reactor Coolant.Caused by Personnel Error.Sampling Valves Realigned ‎ (← links)
  • 05000413/LER-1984-007-02, :on 840729,composite Sampler on Conventional Waste Water Treatment Sys Declared Inoperable.On 840804, 769,000 Gallon Release Made W/O Taking Grab Sample.Samples Obtained from 840804-06 ‎ (← links)
  • ML20097D166 (redirect page) ‎ (← links)
  • 05000413/LER-1984-005-02, :on 840717 & 31,discovered Containment Integrity Not Completely Verified Following Performance of Periodic Test PT/1/A/4200/02F.Caused by Administrative/ Procedural Error.Procedure Change Initiated ‎ (← links)
  • 05000413/LER-1984-004-03, :on 840726-30,daily Surveillance of Unit Vent Flow Rate Monitor Channel Check Not Performed.Caused by Personnel/Administrative Error.Procedure Revised & Personnel Counseled ‎ (← links)
  • 05000413/LER-1984-003-03, :on 840729,two Control Rod Drive Assemblies (CRDA) Failed to Lock After Being Latched.Reactor Bldg Crane Removed Inoperable Crdas,In Violation of Tech Specs.Caused by Personnel Error ‎ (← links)
  • 05000413/LER-1992-004, :on 920314,discovered That Limit Switch Contacts in Incorrect Position on AF Sys motor-driven Pump B Discharge to SG 1C Isolation Valve.On 920302 Design Defect Noted W/Circuit.Valve Replaced ‎ (← links)
  • 05000413/LER-1984-002-04, :on 840728,computer Software Problem Discovered During Analysis of Concentration of Radioactive Matl in Waste Monitor Tank Liquids.Cause Not Stated.Software Problem Corrected ‎ (← links)
  • 05000413/LER-1984-001-05, :on 840721,boric Acid Transfer Pumps 1A & 1B Discovered Damaged & Inoperable Due to Extended Operation W/O Suction or Discharge Flow Path.Caused by Improper Valve Lineup.Procedure Will Be Revised ‎ (← links)
  • 05000413/LER-1990-001-03, :on 891116,concern Noted That Pressurizer Safety Valve Blowdown Greater than Assumed in Safety Analyses.Caused by Functional Design Deficiency.Feedwater Line Break Accident Reanalyzed ‎ (← links)
  • 05000413/LER-1992-003-03, :on 920316,RN Pump 2A Was Declared Inoperable. Caused by Pump Running for 40 Min in Low Flow Condition. Evaluation of Need for Procedure Changes & Shift Briefings Underway ‎ (← links)
  • 05000413/LER-1984-011-02, :on 840905,liquid Waste Release Made from Waste Monitor Tank B of Liquid Radwaste Sys Into Lake Wylie, W/Waste Liquid Discharge Monitor EMF-49 Inoperable.Caused by Personnel Error.All Waste Release Discontinued ‎ (← links)
  • 05000413/LER-1995-005-02, :on 950913,TS Violation Occurred.Caused by Inadequate Written Communication Due to Technical Inaccuracies in Calibr.Calibr Procedures Placed on Hold Until Revs Made to Ensure Integrity ‎ (← links)
  • 05000413/LER-1984-009-02, :on 840827,boron Sampling Procedures Using Reactor Coolant Failed to Provide Viable Data for Seven Consecutive Sampling Periods.Caused by Lack of Sample Flow & Erroneous Sample Location ‎ (← links)
  • 05000413/LER-1984-010-02, :on 840901,reactor Control Rods from More than One Bank Withdrawn at Same Time.Caused by Procedural Deficiency.Main Reactor Trip Breakers Opened.Procedures Revised to Guard Against Similar Occurrences ‎ (← links)
  • 05000413/LER-1995-004-03, :on 950805,TS 3.0.3 Entry Occurred Due to Ventilation Sys Inoperability.Provided Specific Instructions to Personnel Prior to Ingressing to Reactor Bldg Via CAD & Instructions to Security Officers ‎ (← links)
  • 05000413/LER-1992-002, :on 920116,discovered That Breaker Train B Sys Controls Had Not Been Opened During Preceding Maint Activities,Per Tech Spec 3.0.3.Caused by Inappropriate Actions.Enhancements Made to Red Tag Program ‎ (← links)
  • 05000413/LER-1995-003-01, :on 950727,failed to Perform TS Surveillance Due to Unanticipated Interaction of Sys.Reviewed All Penetrations to Determine Similar Situations Exist in Valves ‎ (← links)
  • 05000413/LER-1992-001, :on 920107,secured Upper Containment Unit Fan 1C to Allow for One Containment Air Pressure Release Instead of Normal Two Per Shift.Caused by Inappropriate Action. Changes to Procedures Proposed ‎ (← links)
  • 05000413/LER-1995-003-03, :on 950727,failed to Perform TS Surveillance Due to Unanticipated Interaction of Sys.Reviewed All Penetrations to Determine Whether Similar Situations Exist in Valves Omitted from Containment Integrity Boundary ‎ (← links)
  • 05000413/LER-1991-028, :on 911024,Tech Spec Violation Occurred Due to Exceeding Liquid Waste Release Limits as Result of Inappropriate Actions.Chemistry Specialist Counseled.W/ 911120 1tr ‎ (← links)
  • 05000413/LER-1991-009-02, :on 910717,discovered That Overtemp delta-temp (OTDT) Circuit Not Work Properly Over Entire Range Due to Change in OTDT equation,K2 Valve on 830415.Caused by Design, Mfg,Const/Installation Deficiency ‎ (← links)
  • 05000413/LER-1991-031, :on 911202,TS 4.0.5 Was Violated as Result of Inappropriate Action Due to Missed Iwv ISI Stroke Time Test of Valve.New Stroke Time Test for Valve to Verify Acceptance Criteria Was Performed ‎ (← links)
  • 05000413/LER-1991-023, :on 911117,discovered That Suction Isolation Damper for a Train CR Air Handling Unit Had Failed to Close. Caused by Equipment Failure/Malfunction Due to Failed Hydromotor.Work Request Initiated ‎ (← links)
  • 05000413/LER-1991-030, :on 911121,grab Sample for Inoperable Condenser Air Ejector Exhaust Monitor Not Obtained.Caused by Inappropriate Operator Action.Samples Will Now Be Obtained Twice Per Shift ‎ (← links)
  • 05000413/LER-1991-029, :on 911126,discovered That Surveillance Requirement for Turbine Startup Pressure Switch Alarm Not Performed During Turbine Startups.Caused by Inappropriate Operator Actions.Procedure Revised ‎ (← links)
  • 05000413/LER-1991-020, :on 910915,discovered That Breaker 1EKPG 22, Train a Control Room Area/Ventilation & Chilled Water Sys Open.Caused by Inappropriate Operator Actions.Breaker Closed & Task Force Formed ‎ (← links)
  • 05000413/LER-1991-026, :on 911017,jumper Discovered Across Terminals Inside Train B Solid State Protection Sys Cabinet. Possibly Caused by Inappropriate Action.Jumper Removed & Cabinet Inspected ‎ (← links)
  • 05000413/LER-1991-027, :on 911018,determined That Battery Bank 1EBB in 125-volt Dc Vital Instrumentation & Power Control Sys Inoperable.Caused by Lack of Attention to Detail.Cable Connectors Replaced & Procedure Enhanced ‎ (← links)
  • 05000413/LER-1991-025, :on 910730,hi-hi Auxiliary Feedwater turbine- Driven Pump Sump Level Annunicator Continuously Alarmed in Control Room.Caused by Design Deficiency.Throttle Valve in Discharge Header Opened ‎ (← links)
  • 05000413/LER-1991-024, :on 911009,TS 3.0.3 Entered When Both Trains of Control Room Area Ventilation & Chilled Water Sys Declared Inoperable.Caused by Corroded Switch Contacts & Problems W/Actuator.Actuator to Be Replaced ‎ (← links)
  • 05000413/LER-1991-022, :on 911007,TS Violation Occurred Due to Missed Grab Sample for Inoperable Vent Radiation Monitor 1EMF36. Caused by Specialist a Improperly Following Procedures. Procedure HP/0/B/1009/11 to Be Enhanced ‎ (← links)
  • 05000413/LER-1991-021, :on 911002,turbine Trip Resulting in Reactor Trip Occurred When Vendor Sprayed Water Into Electrical Box. Caused by Failure to Properly Seal Conduit Connectors. Connectors Sealed ‎ (← links)
  • 05000413/LER-1995-002-05, :on 950517,discovered That TS Surveillance Interval Had Been Exceeded.Caused by Unclear Mgt Directions/ Policy Guidance.Work Order Issued & Channel Calibration Performed ‎ (← links)
  • 05000413/LER-1991-019, :on 910911,reactor Trip Occurred as Result of Turbine Trip Above P-9 & Feedwater Control/Bypass Valves Closed Rapidly.Caused by Loss of Feedwater Pumps on High Discharge Pressure.Four Second Delay Added ‎ (← links)
  • 05000413/LER-1991-018, :on 910906,technician Opened Normal Feeder Breaker to Train B Essential Bus Instead of Diesel Generator Breaker Resulting in Blackout.Caused by Inappropriate Operator Action.Operator Counseled ‎ (← links)
  • 05000413/LER-1991-010, :on 910526,feedwater Isolation Occurred.Cause for Event Unknown.Facility Will Evaluate Need to Replace Westinghouse W-2 Cell Switch Which Had Sensitivity Problems in Past ‎ (← links)
  • 05000413/LER-1995-001-04, :on 950420,TS 3.0.3 Was Entered Due to Both Trains of CR Ventilation Being Inoperable.Operations Mgt Communicated Expectations for Human Performance Improvement to All Operations Work Groups ‎ (← links)
  • 05000413/LER-1991-017, :on 910815,discovered That Tech Spec Violation on 901109 Resulted from Missed 18-month Charger Capacity Test on Battery Charger 1ECA.Caused by Inadvertent Computer Entry.Addl Checks Implemented ‎ (← links)
  • 05000413/LER-1991-016, :on 910730,tech Spec Violation Occurred Re Control Rod Position Alarm Monitor Being Inoperable.Caused by Mgt Deficiency.Psd Personnel Reprogramming RAM Programs & Verifying Rdms Operated Properly ‎ (← links)
  • 05000413/LER-1991-015, :on 910710,reactor Trip Occurred as Result of Turbine Trip Above P-9 (69% Reactor Power).Caused by Loss of Both Main Feedwater Pumps on Low Suction Pressure.Tubing Replaced W/New Copper Tubing ‎ (← links)
  • 05000413/LER-1991-011-01, :on 910514,violation Occurred Re Incorrect Flow Orifice Orientation.Caused by Mgt Deficiencies,Inappropriate Action & Defective Procedure.Training Conducted to Ensure Proper Orifice Plate Orientation ‎ (← links)
  • 05000413/LER-1990-007, :on 891108,Tech Spec Violations for Improper Calibr of Undervoltage Relays Discovered.Caused by Mgt & Design Deficiencies.Transmission Procedures Revised to Ensure Compliance W/Existing Tech Spec ‎ (← links)
  • 05000413/LER-1991-012, :on 910505,air Sucked from Ice Condenser During Core Alterations Due to Deficient Communication Between Cro & Ice Machine Operator.Ice Making & Charging Sys Procedure OP/O/B/6200/16 Will Be Revised ‎ (← links)
  • 05000413/LER-1991-011, :on 910526,feedwater Sys Isolation Occurred During Racking Out Activities of a Reactor Trip Bypass Breaker.Cause Unknown.Design Study in Progress ‎ (← links)
  • 05000413/LER-1994-006-02, :on 941018,TS 3.0.3 Entered Due to Inadequate Work Practices.Opened Access Panels Closed & Work Was Stopped That Involved Assess to Ductwork Until Damper Could Be Secured ‎ (← links)
  • 05000413/LER-1994-008, :on 940714,identified That Rn Valves 1RN-E13 & 1RN-E14 Were Properly Positioned But Not Properly Secured. Caused by Improper Work Practices.Properly Secured Valve 1RN-E14 & Verification of All Control Valves ‎ (← links)
  • 05000413/LER-1991-007, :on 910115,Tech Spec Violation Re Failure to Perform Reactor Trip Sys Surveillance Due to Inappropriate Action.Discussion of Event & Action W/Personnel Involved, Training to Improve Communications ‎ (← links)
  • 05000413/LER-1991-005, :on 910212,Tech Spec 3.0.3 Entered When Both Trains of Control Room Area Ventilation & Chilled Water Sys Declared Inoperable.Caused by Refrigerant Leak & Low Refrigerant Temp.Chiller Restarted ‎ (← links)
  • 05000413/LER-1989-009-01, :on 890515,incomplete Tech Spec Associated W/Incore Instrumentation Room Purge Subsystem.Guideline Provided Verifying Iir Purge Subsystem & Design Engineering Evaluated Tech Spec Surveillance Requirements ‎ (← links)
  • 05000413/LER-1991-008, :on 910219,determined That Control Room Ventilation Sys Could Not Satisfy GDC 19 Requirements Under Postulated Scenario.Caused by Design Deficiency.Intake Valves Deenergized to Remain Open ‎ (← links)
  • 05000413/LER-1991-004, :on 910105,18-month Channel Calibr on RCS Radiation Monitor 1EMF48 Missed.Caused by Incorrect Computer Entry.Monitor Declared Inoperable,Channel Calibr Performed & Monitor Returned to Svc ‎ (← links)
  • 05000413/LER-1994-007, :on 940608,operations Discovered Past Due Rept Surveillance Interval Exceeded for TS Surveillance 4.7.6.b for Train A.Caused by Inadequate Verbal Communication.Lead Personnel Instructed to Closely Monitor Test ‎ (← links)
  • 05000413/LER-1991-001, :on 901112,both Trains of RHR Sys Inoperable While Stroke Testing Valves NI136B,NS38B & NS43A.Caused by Defective Procedures & Inappropriate Action.Procedures Revised ‎ (← links)
  • 05000413/LER-1994-005, :on 940425,TS 3.7.6 Limits Exceeded Due to Train a Cravs Being Inoperable for Greater That Seven Days. Caused by Procedure Problems.Changes Made to Troubleshooting Procedures ‎ (← links)
  • 05000413/LER-1991-003, :on 910110,emergency Personnel Hatch Found in Down or Closed Position But Not Latched.Caused by Equipment Failure.Hatch Modified by Installing Match Mark Tab Underneath Handwheel ‎ (← links)
  • 05000413/LER-1990-031-01, :on 901208,Tech Specs Violated Due to Exceeding 24 H Surveillance Interval for CNOAMP5000.Caused by Mgt Deficiency.Frequency of Daily Tech Spec Re Surveillances Changed to Once Per Shift ‎ (← links)
  • 05000413/LER-1990-027-01, :on 901127,determined That Tech Spec 4.0.5 Violation Reportable Re Failure to Retest Reactor Coolant Check Valves as Part of Inservice Testing Program on 891201. Caused by Inappropriate Action.Program Revised ‎ (← links)
  • 05000413/LER-1994-004, :on 940318,Reactor Coolant System Leakage Detection Sys Inoperable.Caused by Less than Adequate Written Communication.Setpoints for Radiation Monitor EMF39 & Loss of Oac Procedures Revised ‎ (← links)
  • 05000413/LER-1990-030, :on 901023,TS 3.0.3 Entered Due to Two Inoperable Trains of Control Room Area Ventilation Sys.W/ ‎ (← links)
  • 05000413/LER-1993-003-04, :on 930925,reactor Tripped Due to Inadvertent Closure of Msiv.Caused by Inadequate Self Checking & Independent Verification of Intended Actions.Procedure IP/0/A/3890/01 Will Be Revised ‎ (← links)
  • 05000413/LER-1994-003-01, :on 940222,determined TS 3.3.1 Table 3.3-1 Action Statement Violations Occurred.Operations,Instrument & Electrical Procedures Revised ‎ (← links)
  • 05000413/LER-1994-002, :on 940203,discovered Monthly Analog Channel Operational Tests for Power Range Neutron Flux Low Setpoint & Intermediate Range Neutron Flux Instrumentation Not Performed.Caused by Mgt Change ‎ (← links)
  • 05000413/LER-1993-006, :on 930612,Unit 1 Reactor Trip Occurred.Caused by Blown Fuse in Range Channel.Control Room Operators Manually Throttled CA Flow to Control Nc Cooldown ‎ (← links)
  • 05000413/LER-1994-001-01, :on 940111,Unit 1 Reactor Trip Occurred Due to Main Turbine Trip on Low Condenser Vaccum.Caused by Fatique Failure.B Heater Extraction Line & Examination of Other Extraction Lines on Both Units ‎ (← links)
  • 05000413/LER-1993-012-02, :on 931225,Unit 1 Entered Mode 3,hot Standby from Mode 4,hot Shutdown W/Auxiliary Feedwater Pump Inoperable.Caused by Personnel Error.Ts Reviewed & Revised ‎ (← links)
  • 05000413/LER-1990-017-01, :on 900926,Tech Spec 3.0.3 Entered Due to Loss of Control Rod Position Indications ‎ (← links)
  • 05000413/LER-1993-011-01, :on 931220,determined TS Surveillance Interval for Snubber Visual Insps Exceeded.Caused by Document Use Practices.Visual Insps Performed on Four Accessible Snubbers Requiring Insp Per TS 3/4.7.8 ‎ (← links)
  • 05000413/LER-1990-029, :on 900718,inadequate Technical Reviews of Compensatory Action Resulted in Tech Spec Violation.Caused by Inadequate Directive/Policy.Departmental Meeting Held to Address Generic Weaknesses ‎ (← links)
  • 05000413/LER-1993-009, :on 930923,TS 3.0.3 Entered Due to Both Trains of CR Ventilation & Chilled Water Sys Being Inoperable. Caused by Less than Adequate Work Practices.Iae Personnel Involved in Event Received Addl Training ‎ (← links)
  • 05000413/LER-1990-028, :on 900723,Tech Spec 3.0.3 Entered Due to Two Inoperable Trains of Control Room Ventilation Sys.Caused by Equipment Failure & Inappropriate Action.Replacement Belts Installed & Discussions Held W/Personnel ‎ (← links)
  • 05000413/LER-1993-010-02, :on 931123,discovered TS Test Interval for Surveillance Section 6.8.4 Not Met.Caused by Less than Adequate Mgt Direction.Procedures Changed & Review Performed to Determine If TS 4.0.2 Appropriately Applied ‎ (← links)
  • 05000413/LER-1990-006-04, :on 900711,determined That Instrumentation & Electrical EMF-43B High Radiation Setpoint Above Tech Spec Setpoint Value.Caused by Inappropriate Action.Review Conducted of How Setpoint Changes Controlled ‎ (← links)
  • 05000413/LER-1989-027, :on 891120,Tech Spec Required Unit Shutdown Due to Inoperable Chemical & Vol Control Centrifugal Pump.W/ ‎ (← links)
  • 05000413/LER-1993-008, :on 930718,reactor Tripped & Auxiliary Feedwater Sys Automatic Start Due to low-low-level in SG 1A. Developed General Troubleshooting Procedure ‎ (← links)
  • 05000413/LER-1993-006-02, :on 930612,automatic Reactor Trip Initiated by intermediate-range Channel N35 Hi Flux Reactor Trip Bistable.Caused by Blown Fuse in Channel.Entire Drawer Replaced & Channel Placed Back in Svc ‎ (← links)
  • 05000413/LER-1990-013-01, :on 900611,approx 5,000 Gallons of RCS Water Inadvertently Transferred to Refueling Water Storage Tank. Caused by Inappropriate Action.Proper Sys Parameters Restored & Analysis of Event Performed ‎ (← links)
  • 05000413/LER-1989-030-01, :on 890726,Tech Spec Violation Occurred Due to Shipment of Two Liners of Secondary Bead & Powdex Resin Mixture.On 891215,same Tech Spec Violation Occurred.Caused by Mgt Deficiency.Shipments Suspended ‎ (← links)
  • 05000413/LER-1990-015, :on 900402,Tech Spec 3.0.3 Entered When Both Trains of Containment Valve Injection Water Sys Rendered Inoperable.Caused by Supervisor Incorrectly Denoting Valve Position.Valves 1RN-493 & 494 Closed ‎ (← links)
  • 05000413/LER-1993-007, :on 930315,unexpected ESF Actuation Occurred, Resulting in Receipt of Spurious Signal & Starting of Awf Sys motor-driven Pumps 1A & 1B.Caused by Unanticipated Sys Interactions.Valve Control Trains Reset ‎ (← links)
  • 05000413/LER-1993-002-03, :on 930225,nuclear SW Sys Pump Discharge Valves Failed to Open During Rn Pump Start.Caused by Lack of Detailed Info in MOV Torque Switch Setup Procedure.Ts Surveillance & Training Developed ‎ (← links)
  • 05000413/LER-1993-004, :on 930305,TS SR 4.8.1.1.1a Missed When AC Offsite Power Sources Not Verified within 1 H.Caused by Deficient Work Practices.Procedures OP/0/A/6400/06C & OP/1(2)/A)6350/02 Revised ‎ (← links)
  • 05000413/LER-1993-005, :on 930301,NRC Resident Inspector Discovered Ssps Wiring Errors Due to Mfg Fabrication Deficiency.Work Request 93017239-01 Initiated & Mfg Distributed Info Notice Addressing Wiring Problems ‎ (← links)
  • 05000413/LER-1993-003, :on 930216,discovered That Portion of CS Sys Channels Between Process Instrumentation & Esfa Not Properly Performed Due to Deficient Written Communication.Procedures Revised to Include Circuit Continuity Checks ‎ (← links)
  • 05000413/LER-1990-023, :on 900330,ESF Actuation Occurred.Caused by Defective Procedure for Erroneous Info.Procedure Will Be Revised & Incident Will Be Reviewed by Exempt Performance Personnel ‎ (← links)
  • 05000413/LER-1990-020, :on 900324,low Pressure Indication Noted on Cardox Carbon Dioxide Storage Unit & Continuous Fire Watch Not Provided within 1 H.Caused by Personnel Lack of Attention to Detail.Fire Watch Established ‎ (← links)
  • 05000413/LER-1990-022, :on 900325,approx 5,000 Gallons of Water Injected Into Rcs,Resulting in Exceeding 200 F Tech Spec Cooldown Limit.Caused by Mgt Deficiency.Isolation Valve 1NI-9A Closed to Terminate Injection Flow ‎ (← links)
  • 05000413/LER-1990-021, :on 900212,fire Doors Declared Inoperable to Permit Routing of Hose to Drain Component Cooling Sys Equipment & Surveillance Intervals Exceeded 1 H.Caused by Mgt Deficiency.Notice Re Fire Watch Issued ‎ (← links)
  • 05000413/LER-1990-019, :on 900323,operations Personnel Inadvertently Pulled Supply Power Lead to Control Room Area Ventilation & Chilled Water Sys Train B Chiller Package.Caused by Deficient Procedure.Procedure Revised ‎ (← links)
  • 05000413/LER-1990-018, :on 900320,Tech Spec Violation Due to Missed Surveillance Resulting in Pressurizer Porv.Caused by Inappropriate Action.Procedures Revised to Ensure Equipment Operability Meets Tech Spec Requirements ‎ (← links)
  • 05000413/LER-1990-016, :on 900305,Tech Spec Sample of Refueling Water Storage Tank Missed.Caused by Inappropriate Action Due to Failure to Recognize Need to Ensure Operable Borated Water Source.Chemistry Mgt Procedure Revised ‎ (← links)
  • 05000413/LER-1990-014, :on 900228,observed That During Ongoing Review of Ventilation Sys,Annulus Ventilation Sys Temp Controller Setpoints Appeared to Be Setup in Nonconservative Manner. Caused by Mfg Deficiency.Part 21 Related ‎ (← links)
  • 05000413/LER-1990-012, :on 891108,observed That Test Acceptance Criteria for Monthly 4,160 Volt Essential Bus Undervoltage Relay Tests Did Not Agree W/Tech Specs.Caused by Mgt Deficiency for Lack of Procedure Control ‎ (← links)
  • 05000413/LER-1989-010-02, :on 890331,Tech Spec 3.0.3 Entered & Unusual Event Declared Due to Both Trains of Control Room Area Ventilation Sys Being Inoperable.Caused by Failure of Inboard Motor Bearing.Motor Replaced ‎ (← links)
  • 05000413/LER-1990-003, :on 900112,FSAR Dose Limits Set for LOCA Offsite Dose Analysis Could Have Been Exceeded by 10% If LOCA Occurred Coincident W/Loss of Train B Electrical Power. Caused by Mgt Deficiency.Procedures Revised ‎ (← links)
  • 05000413/LER-1991-002-01, :on 910113,reactor Exceeded 5% Power Level W/ RHR Sys Pump 1A Inoperable Due to Closed Suction Valve. Caused by Inappropriate Action & Procedural Deficiency. Incident Discussed W/Involved Personnel ‎ (← links)
  • 05000413/LER-1991-006-01, :on 910323,nuclear Svc Water Valves Left W/O Emergency Power Supply.Caused by Inappropriate Action Due to Misreading of Operator Aid Computer (Oac) Graphics.Oac Graphics Training Will Be Provided ‎ (← links)
  • 05000413/LER-1990-005, :on 900126,Tech Spec 3.0,3 Entered Due to More than One Power Range Nuclear Instrumentation Channel Exceeding 5% Deviation.Caused by Mgt Deficiency.Operations Procedure Revised ‎ (← links)
  • 05000413/LER-1990-011, :on 900215,discovered That Control Room Doors Were More Difficult to Open than Normal.Ventilation Sys Found to Be Incapable of Maintaining Positive Pressure. Caused by Design Deficiency.Walls Sealed ‎ (← links)
  • 05000413/LER-1990-009, :on 900212,containment Purge Sys Heaters Not Being Verified to Be Running During Monthly Surveillance as Required by Tech Specs.Caused by Defective Procedures,Due to Incomplete Info.Procedures Revised ‎ (← links)
  • 05000413/LER-1990-010, :on 900205,discovered That Standby Shutdown Facility Wide Range RCS Temp Indications Had Not Been Subj to Monthly Channel Check as Required by Tech Spec 4.7.13.6. Caused by Defective Procedure ‎ (← links)
  • 05000413/LER-1990-012-01, :on 900127,central Alarm Station Operator Noted That Controlled Access Door Not Closed.Caused by Inappropriate Action Taken Which Was Unauthorized.Personnel Counseled on Importance of Sys Operability ‎ (← links)
  • 05000413/LER-1990-008, :on 900203,discovered That Insulation Removed from Main Steam Auxiliary Equipment Piping to Auxiliary Feedwater Pump Turbine.Caused by Design Oversight Due to Unanticipated Interaction of Sys ‎ (← links)
  • 05000413/LER-1990-001-02, :on 891116,potential Concern Identified W/ Pressurizer Safety Valve Blowdown Being Greater than Assumed in Safety Analyses.Caused by Functional Design Deficiency. Also Reportable Per Part 21 ‎ (← links)
  • 05000413/LER-1990-002, :on 900103,containment Air Return Fan 1B Failed to Start During Quarterly Test & Breaker F01A in Motor Control Ctr Discovered Open.Caused by Inappropriate Operator Action.Lockout Breakers Closed ‎ (← links)
  • 05000413/LER-1989-027-01, :on 891120,chemical & Vol Control Sys Centrifugal Charging Pump 1B Declared Inoperable Due to Inability to Maintain Sufficient Charging Flow.Cause Not determined.Power-range Detector Replaced ‎ (← links)
  • 05000413/LER-1990-004, :on 900104,contact Carrier Screws in nonsafety- Related Breaker Found Loose & in Bottom of Motor Control Ctr Cubicle.Caused by Mfg Deficiency.Loose Screws Secured. Part 21 Related ‎ (← links)
  • 05000413/LER-1989-013-05, :on 890726,two Carbon Steel Liners,Containing Mixture of Powdex & Bead Resins,Shipped to Barnwell,Sc,In Violation of Process Control Program.Caused by Mgt Deficiency.Shipment Suspended ‎ (← links)
  • 05000413/LER-1989-020-02, :on 890921,abnormal Degradation of Steel Containment Vessels Observed.Caused by Corrosion by Standing Water in Annulus Areas.Steel Containment Vessels Will Be Recoated During Next Refueling Outage ‎ (← links)
  • 05000413/LER-1989-028, :on 891204,steam Generator 1D Power Operated Relief Valve Did Not Close on Train a Main Steam Isolation Signal During Valve Inservice Test.Caused by Failed Fuse. Fuse Replaced ‎ (← links)
  • 05000413/LER-1989-025, :on 890922,power Lost to Condenser Circulating Water Cooling Tower Fans Due to Deenergization of 13.8 Kv Auxiliary Switchgear.Caused by Weather Conditions.Reactor Power Reduced to Maintain Condenser Vacuum ‎ (← links)
  • 05000413/LER-1989-029-01, :on 891213,determined That Max Actuator Torque Switch Setting Insufficient to Overcome Friction Force Due to Age Hardening of Elastomeric Seat Matl on Bif/General Signal Corp Valve.Also Reported Per Part 21 ‎ (← links)
  • 05000413/LER-1989-023, :on 890915,Tech Spec 3.0.3 Entered as Result of Both Trains of Control Room Area Ventilation Sys Being Inoperable.Caused by Equipment Malfunctions.Control Room & Area Pressurization Flow Rates Revised ‎ (← links)
  • 05000413/LER-1989-025-01, :on 890922,auxiliary Switchgear Deenergized, Resulting in Loss of Power to Condenser Circulating Water Cooling Tower Fans.Caused by Inoperable power-range Instrumentation Due to Hurricane Hugo ‎ (← links)
  • 05000413/LER-1989-016-02, :on 890913,four Channels of Power Range Instrumentation Showed Greater than 5% Allowable Mismatch Between Rated Thermal Power & Nuclear Power.Caused by Equipment Failure.Pneumatic Gauge Replaced ‎ (← links)
  • 05000413/LER-1989-023-01, :on 890915,Tech Spec 3.0.3 Entered Due to Both Trains of Control Room Area Ventilation Sys Being Inoperable.Caused by Defective pre-operational Testing Procedure.Train a Control Room Damper Adjusted ‎ (← links)
  • 05000413/LER-1989-026, :on 890823,tested Breaker Replaced W/Traceable Breaker in Response to Bulletin 88-010.Breaker Tripped. Caused by Mfg Deficiency.Work Request Written.Item Reportable Per Part 21 ‎ (← links)
  • 05000413/LER-1989-025-02, :on 890922,13.8 Kv Auxiliary Switchgear Deenergized Resulting in Loss of Power to Condenser Circulating Water Cooling Tower Fans.Power Reduction Due to Hurricane Hugo ‎ (← links)
  • 05000413/LER-1989-024, :on 890920,safety Review Group Staff Member Identified Committed Fire Door S102A as Possibly Inadequate. Caused by Design Deficiency.Fire Watch Established & Door Repaired ‎ (← links)
  • 05000413/LER-2019-002-01, Condition Prohibited by Technical Specifications and Loss of Safety Function Due to Auxiliary Feedwater Sump Pump Conditions ‎ (← links)
  • 05000413/LER-2019-002, Condition Prohibited by Technical Specifications Due to Auxiliary Feedwater Sump Pump Conditions ‎ (← links)
  • 05000413/LER-2016-001, Regarding Mispositioned Breaker for Residual Heat Removal Loop Suction Results in Inoperable Train of Emergency Core Cooling System ‎ (← links)
  • 05000413/LER-2014-002, Regarding Unanalyzed Condition Due to Deviations from Fire Protection Current Licensing Basis Identified During NFPA 805 Transition ‎ (← links)
  • 05000413/LER-2014-001, Unit Regarding Condition Prohibited by Technical Specifications (TS) and Notice of Enforcement Discretion (NOED) Due to Misaligned Connecting Rod Bearing on Diesel Generator (DG) 1A ‎ (← links)
  • 05000413/LER-2013-002, Regarding Technical Specification Limiting Conditions for Operation (Lcos) 3.6.3 and 3.7.3 Were Violated Due to the Isolation of Nitrogen Supply to Two Unit 1 Main Feedwater Isolation Valves ‎ (← links)
  • 05000413/LER-2013-001, 0 for Catawba Nuclear Station, Unit 1 and 2 Regarding Each Diesel Generator Was Determined to Be Unknowingly Inoperable During Its Monthly Surveillance Test Due to Technical Specification Surveillance Requirement 3.8.1.17 Not B ‎ (← links)
  • 05000413/LER-2012-003, Regarding Technical Specification (TS) Limiting Conditions for Operation (Lcos) 3.0.4 & 3.7.5 Were Violated Due to Unit 1 Entering Mode 3 with Turbine Driven Auxiliary Feedwater (AFW) Pump Unknowingly ‎ (← links)
  • 05000413/LER-2012-002, Regarding Discovery of Inadequacy in Surveillance Testing of Solid State Protection System ‎ (← links)
  • 05000413/LER-2012-001-01, Regarding Automatic Reactor Trip Due to Faulted Reactor Coolant Pump Motor Cable Resulted in Zone G Relay Lockout and Subsequent Loss of Offsite Power and Emergency Diesel Generator Automatic Start for Both Units ‎ (← links)
  • 05000413/LER-2011-003, Technical Specification Required Shutdown of Unit 1 and Unit 2 and Associated Technical Specification Violation Involving Notice of Enforcement Discretion Due to Two Inoperable Trains of the Control Room Area Chilled ‎ (← links)
  • 05000413/LER-2011-002, For Catawba, Unit 1, Regarding Safety System Actuation of Auxiliary Feedwater Due to Feedwater Isolation During Unit Shutdown ‎ (← links)
  • 05000413/LER-2011-001, For Catawba Nuclear Station, Unit 1 Regarding Technical Specification Violation Involving Notice of Enforcement Discretion Due to Failure of Diesel Generator Mechanical Governor ‎ (← links)
  • 05000413/LER-2010-004, For Catawba, Unit 1, Regarding Technical Specification Violation Involving Notice of Enforcement Discretion Due to Failure of Diesel Generator Engine-Mounted Thermocouple ‎ (← links)
  • 05000413/LER-2010-003, Regarding Technical Specification Violation Due to Failure to Perform Required Actions Following Solid State Protection System Relay Latch Failure ‎ (← links)
  • 05000413/LER-2010-002, Discovery of Reactor Coolant System Pressure Boundary Leak at Thermowell 1NCTW5850 Seal Weld ‎ (← links)
  • 05000413/LER-2010-001, Catawb, Unit 1, Regarding Technical Specification Violation Associated with Failure to Perform Offsite Circuit Verification ‎ (← links)
  • 05000413/LER-2009-001, Both Trains of Chemical Volume Control, Auxiliary Feedwater and Containment Spray Systems Were Inoperable Due to a Component Failure ‎ (← links)
  • 05000413/LER-2008-001, Re Auxiliary Feedwater Declared Inoperable Due to Inadequate Design and Configuration of Floor Drain Flow Restrictor Cover Plates ‎ (← links)
  • 05000413/LER-2007-001-01, Safe Shutdown Capability Potentially Challenged by Fire Protection Deficiencies Attributed to Design Oversight ‎ (← links)
  • 05000413/LER-2007-003, Undervoltage Condition Resulted in the Actuation of the Emergency Diesel Generator ‎ (← links)
  • 05000413/LER-2006-003, Re Technical Specification Violations Associated with Hydrogen Ignition System ‎ (← links)
  • 05000413/LER-2006-002, Regarding Safe Shutdown Potentially Challenged by an External Flooding Event and Inadequate Design and Configuration Control ‎ (← links)
  • 05000413/LER-2006-001, Regarding Loss of Offsite Power Event Resulted in Reactor Trip of Both Catawba Units from 100% Power ‎ (← links)
  • 05000413/LER-2004-004, Regarding Spurious Moisture Separator Reheater High Level Actuation Resulting in an Automatic Turbine Trip and Reactor Trip ‎ (← links)
  • 05000413/LER-2004-003, Regarding Unanalyzed Condition Due to Inadequate Evaluation of Fire Interactions ‎ (← links)
  • 05000413/LER-2004-002, Unit Manual Reactor Trip Initiated Due to the Closure of a Main Feedwater Isolation Valve ‎ (← links)
  • 05000413/LER-2004-001, Regarding Gas Accumulation in Centrifugal Charging Pump Suction Piping ‎ (← links)
  • 05000413/LER-2003-006, Regarding 1B Containment Spray System Inoperable for Longer than Technical Specifications Allow Due to Heat Exchanger Baffle Plate Degradation ‎ (← links)
  • 05000413/LER-2003-005, Regarding Reactor Trip Due to Pressurizer Pressure Channel Failure ‎ (← links)
  • 05000413/LER-2003-004, A Containment Spray System Inoperable for Longer than Technical Specifications Allow Due to Heat Exchanger Fouling ‎ (← links)
  • 05000413/LER-2003-003, For Catawba Unit 1, Failure of 4160 Volt Breaker Renders 1B1 Component Cooling Water Pump Inoperable for Longer than Technical Specifications Allow ‎ (← links)
  • 05000413/LER-2003-002, Loss of Safety Function Due to Inoperability of the 2B Diesel Generator Upon Loss of Vital Inverter 2EID with the 2A Diesel Generator Inoperable ‎ (← links)
  • 05000413/LER-2003-001, From Catawba, Unit 1 Regarding High Steam Generator Level Turbine Trip Causes Reactor Trip & Automatic Start of Motor Driven Auxiliary Feedwater System Pumps ‎ (← links)
  • 05000413/LER-2002-006, Technical Specification Noncompliance - Inoperable Diesel Generator Caused by Inadequate Wire Lug Crimping at Closing Spring Motor Disconnect Switch ‎ (← links)
  • 05000413/LER-2002-004, Re Pipe Spray Interaction Affecting Safety Related Equipment ‎ (← links)
  • 05000413/LER-2002-005, Am-241 Source Lost During Procedure Verification Activities on June 25, 2002 ‎ (← links)
  • 05000413/LER-2002-003, Emergency Personnel Hatch Unlatched ‎ (← links)
• 05000414/LER-1996-006-02, :on 961101,TS Surveillance for AC Offsite Power Sources Was Missed.Caused by Insufficient Detail in Test Procedure.Quality Improvement Team Has Been Created to Track Short Duration Inoperabilities ‎ (← links)
• 05000414/LER-1996-005-06, :on 961028,determined That Plant May Have Operated in Standby Shutdown Sys Potentially Outside of Design Basis.Caused by Inadequate Sys Design Bases.Placed Vent Valves in Planned Maint Schedule ‎ (← links)
• 05000413/LER-1996-014, :on 961230,solid State Protection Sys Train B Relay K616 Properly Actuated,Failed to Latch in Tripped Position During Periodic Main Steam Line Isolation Testing. Caused by Equipment failure.K616 Replaced ‎ (← links)
• 05000413/LER-1996-012, :on 961211,auxiliary Feedwater Sys Found Outside Design Basis Occurred.Caused by Initial Design Oversight.Minor Mods Were Completed to Add Check Valves to Each Unit ‎ (← links)
• 05000414/LER-1996-007-03, :on 961216,ECCS Discharge Into Reactor Coolant Sys Occurred.Caused by Failure to Follow Procedures. Increased Nc Pressure to Close Cla Check Valves & Then Closed Cla Discharge Isolation Valves ‎ (← links)
• 05000413/LER-1996-013, :on 961218,TS 3.4.6.1 Violation Occurred Due to an Error in Replacement Operator Aid Computer Programming.Computer Points Were Added to Replacement Oac & an Alarm Response Was Developed ‎ (← links)
• 05000413/LER-1996-011, :on 961210,cross Channel Check Comparison of Loops a & B W/Loops C & D Showed Setpoint Readings for All 4 Loops Were Incorrect.Caused by Slight Increase in Test Lead Resistance.Loops a & B Recalibrated ‎ (← links)
• 05000413/LER-1996-010, :on 961107,TS Surveillance for VY Sys Containment Isolation Valves Was Missed.Caused by Inadequate Verification of Pertinent Info During Implementation of Periodic Testing Program.Tested Valves ‎ (← links)
• 05000413/LER-1996-009-02, :on 960930,use of Inadequate Reactor Coolant Controlled Leakage Test Occurred.Caused by Omission of Relevant TS Bases Info.Revised Procedures for Performing Reactor Coolant Sys Controlled Leakage Test ‎ (← links)
• 05000413/LER-1996-008-01, :on 950307,closure Response Time Was Exceeded for MSIV 1SM1,B Train.Caused by Spurious Failures of B Train Exhaust Solenoid Valve for 1SM1.Valves Used in Pnuematic Controls for Unit 1 Have Been Replaced ‎ (← links)
• 05000413/LER-1996-003-06, :on 960802,TS 3.0.3 Required Shutdown Initiated,Due to Ventilation Sys Motor Failures.Unit 2 Was Shutdown to MOD 5 Per Requirements of TS 3.0.3.Damaged Motors Were Replaced ‎ (← links)
• 05000414/LER-1996-004-03, :on 960806,containment Floor & Equipment Sump Level Alarm Was Inoperability Due to Operator Aid Computer Error.Replacement for Unit Is Taking Place During Current Outage.Oac Error Was Corrected & Replaced ‎ (← links)
• 05000413/LER-1996-007-01, :on 960718,discovered MSSV Lift Setpoint Drift. Caused by Unanticipated Interaction of Components.Adjusted & Retested Valves & Submitted Application to Amend TS to Change Tolerance to Plus or Minus 3 Percent ‎ (← links)
• 05000413/LER-1996-006-01, :on 960509,discovered Containment Floor and Equipment Sump Level Monitoring Inaccuracy.Caused by Inadequate Design Analysis.Added Water to Sumps to Ensure Sump Level Remains in Calibr Range ‎ (← links)
• 05000413/LER-1996-005-01, :on 960613,automatic Reactor Trip Occurred. Caused by Failed Capacitor.Replaced & Tested Failed Capacitor ‎ (← links)
• 05000413/LER-1996-004-01, :on 960506,standby Shutdown Sys Found Outside Design Basis.Caused by Misinterpretation of Info.Changed Design Basis Document Based on Corrected Calculations & Implemented Mod to Ensure Water Availability ‎ (← links)
• 05000413/LER-1996-003-01, :on 960508,Control Rod Bank a Group 1 Failed to Withdraw from Inserted Test Position of 219 Steps.Caused by Failed Firing Card.Unit Shutdown to Mode 3 & Failed Firing Card Replaced W/Spare Firing Card ‎ (← links)
• 05000413/LER-1996-002-04, :on 960503,TS 3.0.3 Entered Due to Inconclusive Surveillance Testing.Caused by Ommission of Relevant Info & Inadequate Training.Reviewed Test Procedures & Trained Personnel Re Multimeter Use ‎ (← links)
• 05000414/LER-1996-002-03, :on 960318,TS Violation for Redundant Hydrogen Igniters Inoperable in Same Region Occurred.Caused by No Programmatic Requirements in Place Directing Maint to Perform Communication.Blown Fuse Replaced ‎ (← links)
• 05000414/LER-1996-001-02, :on 960206,loss of Offsite Power Due to Electrical Component Failures Occurred.Caused by Application of Type of Resistor Bushing Used.All Resister Bushing in Application Replaced ‎ (← links)