Pages that link to "05000483/LER-2021-001, Manual Actuation of Essential Service Water System"
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The following pages link to 05000483/LER-2021-001, Manual Actuation of Essential Service Water System:
Displayed 12 items.
- 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition (← links)
- 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor (← links)
- 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat (← links)
- 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability (← links)
- 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded (← links)
- 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown (← links)
- ULNRC-06142, SR-14-002 Callaway, Unit 1 - Special Report 2014-02-PAM Report Inoperability of Post Accident Monitoring (PAM) Instrument (← links)
- ULNRC-05824, Special Report 2011-01 for Callway, Unit 1 Regarding Inoperability of a Seismic Instrument for Greater than 30 Days (← links)
- ML021050340 (← links)
- ML21098A254 (redirect page) (← links)
- 05000483/LER-2021-001 (redirect page) (← links)
- 05000483/LER-2015-004, Auxiliary Feedwater Control Valve Inoperable Due To Faulty Electronic Positioner Card (← links)
- 05000483/LER-2015-001, Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13 (← links)
- 05000483/LER-2015-002, Manual Auxiliary Feedwater System Actuation (← links)
- 05000483/LER-2015-003, Reactor Trip Caused by Transmission Line Fault (← links)
- 05000483/LER-2002-003 (← links)
- 05000483/LER-2001-005 (← links)
- 05000483/LER-2001-003 (← links)
- 05000483/LER-2001-002 (← links)
- 05000483/LER-2001-001 (← links)
- 05000483/LER-1984-056, Forwards LER 84-056-00 (← links)
- IR 05000483/2021002 (← links)
- 05000483/LER-2024-002, Concurrent Inoperability of Control Room Air Conditioning System Train and Opposite Train Emergency Diesel Generator Results in Condition Prohibited by Technical Specifications Limiting (← links)
- 05000483/LER-2024-001, Reactor Trip Due to Turbine Trip (← links)
- 05000483/LER-2023-001, Inoperable Instrument Tunnel Sump Level Indication Resulted in Condition Prohibited by Technical Specifications (← links)
- 05000483/LER-2022-003-01, Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications (← links)
- 05000483/LER-2022-003, Submittal of Class 1E Electrical Air Conditioning System Thermal Expansion Valve Failure Resulted in Condition Prohibited by Technical Specifications (← links)
- 05000483/LER-2022-002, Containment Spray and Cooling Systems, and a Condition Which Could Have Prevented Fulfillment of the Safety Function of the Containment Spray System (← links)
- 05000483/LER-2022-001, Reactor Trip During Reactor Trip Breaker Surveillance Testing (← links)
- 05000483/LER-2021-001, Manual Actuation of Essential Service Water System (← links)
- 05000483/LER-2020-008, Reactor Trip Due to Main Generator Electrical Fault (← links)
- 05000483/LER-2020-002-01, Reactor Trip and AFW Actuation Following Spurious MFRV Closure (← links)
- 05000483/LER-2020-001-01, Emergency Exhaust Inoperable Due to Fan Belt Degradation and Failure (← links)
- 05000483/LER-2020-007, Re B Pressurizer PORV Inoperable Due to Nonconformance with EQ Requirements (← links)
- 05000483/LER-2020-006, Reactor Trip Due to Main Generator Ground Fault (← links)
- 05000483/LER-2020-005, Inoperable Isolation Valve Between Safety-Related Essential Service Water and Nonsafety-Related Service Water (← links)
- 05000483/LER-2020-004, Violation of Technical Specification 3.8.1, AC Sources-Operating (← links)
- 05000483/LER-1998-004, :on 980502,TS Violation Due to Missed TS 4.2.5.4 Calibration of FW Temp Detectors Was Noted.Caused by Engineer Error.Revised Procedure to Ensure TS Is Calibrated within 7 Days of Performing Surveillance (← links)
- 05000483/LER-1998-005, :on 980430,mispositioning of warm-up Steam Supply Valves to Tdafwp Results in TS 3.0.4 Violation During Refuel 9.Caused by ABHV0048 & ABHV0049 Not Being Opened Upon Sys Restoration.Revised Procedures (← links)
- 05000483/LER-1989-011-01, :on 890905,ESF Containment Purge,Control Room Ventilation & Fuel Bldg Ventilation Isolations Received. Caused by Failed 15-volt Dc Power Supply in Train B ESF Cabinet.Power Supply Replaced & Tested (← links)
- 05000483/LER-1989-011, :on 890906,steam Generator lo-lo Level Trip Time Delays Reinstated W/O Being Verified Operable by Performance of Tech Spec Surveillance Requirement.Caused by Personnel Error.Procedure Revised (← links)
- 05000483/LER-1989-002, :on 890228 & 0303,unplanned ESF Actuations Occurred.Caused by Shield Breakage of Coaxial Cable & Technician Inadvertent Push of ESF Actuation Push Button, Respectively.Cable Replaced (← links)
- 05000483/LER-1989-001, :on 890207 & 15,diesel Generator Train B Declared Inoperable When Fuel Oil Transfer Pump Failed to Autostart During Surveillance Test.Caused by Failure of Main Control Board Switch Contacts.Switch Replaced (← links)
- 05000483/LER-1989-008, :on 890623,control Rod Bank B Failed to Move & Declared Inoperable in Mode 1.Caused by Failure of Flashover Relay Due to Loose Set Screw.Defective Rod Control Circuit Boards Replaced (← links)
- 05000483/LER-1989-004, :on 890517,feedwater Isolation Signal Occurred Due to Water Level in Steam Generator a Increasing to High Level Trip Setpoint.Caused by Failure to Adequately Equalize Pressure Across MSIV Prior to Opening Valves (← links)
- 05000483/LER-1989-007, :on 890612,auxiliary Feedwater Actuation of motor-driven Auxiliary Feedwater Pump a Occurred.Caused by Inappropriate Human Performance on Part of Licensed Reactor Operator.Event Discussed W/Licensed Operators (← links)
- 05000483/LER-1989-003, :on 890331,feedwater Isolation & Auxiliary Feedwater Actuation Occurred Due to High Water Level in Steam Generator A.Caused by Personnel Failure to Curb Steam Generator Level Increase.Training Provided (← links)
- 05000483/LER-1989-006, :on 890529,reactor Trip Occurred on Power Range Neutron Flux Rate Trip Signal.Caused by Lack of Detail Provided in Plant Procedures.Procedure ESP-ZZ-00006, Incore /Excore Calibr Revised (← links)
- 05000483/LER-1989-009, :on 890511,containment Isolation Valve Failed to Fully Close Against Sys Differential Pressure.Caused by Addl Packing Loads Developed on 890306.Repacking Caused Increased Stem Friction.Procedure Revised (← links)
- 05000483/LER-1989-005, :on 890518,ESF Safety Injection Actuation on Train a Received Due to Low Steamline Pressure Signal During Operational Test.Caused by Personnel Error.Procedure Revised (← links)
- 05000483/LER-1989-005-01, :on 890518,ESF Safety Injection Actuation on Train a Received Due to Low Steamline Pressure Signal.Caused by Personnel Error Due to Operator Depressing Incorrect Main Control Board Button.Personnel Counseled (← links)
- 05000483/LER-1988-013, :on 881029,discovered That Raychem heat-shrink Terminations for Steam Generator C Not Installed in Environ Qualification Configuration.Caused by Incomplete Installation Procedures & Inadequate Training (← links)
- 05000483/LER-1987-018, :on 870815,essential Svc Water Train B Declared Inoperable Due to Partially Shut UHS Isolation Valve EF-V-0117.Caused by Personnel Error.Valve Actuator Caution Tagged & Will Be Repaired During Refuel II (← links)
- 05000483/LER-1987-013, :on 870608,control Room Emergency Ventilation Sys Inoperable Due to Pressure Boundary Breach.Caused by Personnel Error.Mispositioned Damper Found on 870814. Penetrations Sealed & Personnel Counseled (← links)
- 05000483/LER-1987-014, :on 870718,control Room Ventilation,Fuel Bldg & Containment Purge Isolations Occurred.Caused by Failure of 15 Volt Dc Power Supply in ESFAS Cabinet SA036D.Power Supply Replaced & ESF Sys Returned to Normal (← links)
- 05000483/LER-1987-016, :on 870625,monthly Sampling & Analysis of Unit Vent Gaseous Effluents Not Performed as Required by Tech Specs.Caused by Personnel Error.All Technicians Instructed to Follow Appropriate Surveillance Procedures (← links)
- 05000483/LER-1987-017, :on 870629 & 0715,safety Injection Pumps to Refueling Water Storage Sys Hand Control Valve Rendered Inoperable.Caused by Personnel Errors.Appropriate Scheduling of Maint Activities Assured (← links)
- 05000483/LER-1987-015, :on 870616 & 23,cask Handling & Spent Fuel Pool Bridge Cranes Used for Handling New Fuel W/O Verifying Crane Operability Per Tech Spec 4.9.7.Caused by Personnel Error & Lack of Adequate Procedural Mechanism (← links)
- 05000483/LER-1986-030, :on 860909,reactor Trip on Loop Low Flow Signal Occurred.Caused by Failure of Equalization Valve to Close During Restoration of Flow Transmitter to Svc.Work Request Written to Replace Manifold Valve (← links)
- 05000483/LER-1998-007, :on 980722,noted Failure to Verify Integrity of Balancing Devices on Psvs Per TS 4.0.5.Caused by Personnel Not Being Aware That Subject Psvs Had Balancing Devices.Will Continue to Test & Refurbish Valves Offsite (← links)
- 05000483/LER-1987-032, :on 871108,reactor Trip Occurred on Low Steam Generator Level Oscillation Following Leaking MSIV Retest. Caused by Operator Retesting in Mode 2 Instead of Mode 3. Retest Will Be Performed in Mode 3 (← links)
- 05000483/LER-1998-006, :on 980707,RCS Pressurizer Safety Relief Valves Failed Low on as Found Set Pressure Test.Caused by Set Pressure Drift.Pressurizer SRVs Were Refurbished Following Set Pressure Testing (← links)
- 05000483/LER-1987-031, :on 871104,two Safety Injection Accumulators Inoperable & Tech Spec 3.0.3 Entered.Caused by Leakage Past Check Valve EP-8818D,resulting from High Nitrogen Pressure Regulator Setpoint.Regulator Setpoint Changed (← links)
- 05000483/LER-1987-030, :on 871023,28 & 29,ESF Actuations Occurred Upon Loss of Power to Radiation Monitors Resulting in Control Room Ventilation & Containment Purge Isolations.Caused by Upscale Signal Spikes from Monitor Isolators (← links)
- 05000483/LER-1987-017-01, :on 870629 & 0715,safety Injection Pumps to Refueling Water Storage Sys Hand Control Valve Momentarily Shut.Caused by Personnel Error.Procedure Revised (← links)
- 05000483/LER-1987-029, :on 871008,ESF Automatic Actuation Received Resulting in Containment Purge & Control Room Ventilation Isolation.Containment Purge & Control Room Emergency Ventilation Sys Restored to Normal Lineup (← links)
- 05000483/LER-1987-013-01, Discusses Encl LER 87-013-01 Re Inoperable Control Room Emergency Ventilation Sys.Ler Discusses Two Events When Both Trains of Sys Simultaneously Rendered Inoperable.First Event Caused by Personnel Error (← links)
- 05000483/LER-1987-028, :on 871003,personnel Failed to Maintain Continuous Firewatch for Blocked Open Fire Door Upon Hearing Misinterpreted Fire Alarm.Caused by Personnel Error.Training Program Revised (← links)
- 05000483/LER-1987-012, :on 870625,incorrect Scaling of Circuitry Providing Correction to overtemp-delta Temp Reactor Trip Setpoint Determined.Caused by Interdepartmental Misunderstanding.Scaling Corrected (← links)
- 05000483/LER-1987-027, :on 870916,essential Svc Water (ESW) Train a Valve Not Tested Per Tech Spec Allowable Extension Date. Caused by Programmatic Deficiency.Design Change Developed to Correct Clogging of ESW Supply Lines (← links)
- 05000483/LER-1987-026, :on 870916,containment Purge Isolation & Control Room Ventilation Isolation Sys of ESF Actuated. Caused by Personnel Error.Proper Actuation of Fans & Dampers Verified (← links)
- 05000483/LER-1987-022, :on 870828,Tech Spec 3.0.3 Unknowingly Entered Twice When Action Statement for Inoperable Auxiliary Feedwater Pressure Channel Not Met.Caused by Procedural Inadequacies.Procedure Revised (← links)
- 05000483/LER-1987-024, :on 870903,hourly Tech Spec Firewatches (FW) Missed Due to Radiological Controlled Area Access Restriction for Presence of Noble Gas.Fw Log Will Be Enhanced to Make Tech Specs Readily Available (← links)
- 05000483/LER-1987-025, :on 870904,containment Purge Isolation,Control Room Ventilation Isolation & Fuel Bldg Ventilation Isolation Occurred Due to ESF Actuations.Caused by Power Supply Failure.Power Supply PS-4 Replaced (← links)
- 05000483/LER-1987-023, :on 870831,failure to Establish Auxiliary Continuous Sampling During Surveillance.Caused by Procedural Inadequacies.Count Room Personnel Commenced Alternate Sampling & Procedures Will Be Revised (← links)
- 05000483/LER-1987-021, :on 870820,failure to Demonstrate Valve Operability by Performance of Cycling Test & Verification of Isolation Time.Caused by Personnel Error.Valve BM-HV-0002 Cycle Tested & Applicable Procedure Revised (← links)
- 05000483/LER-1987-011, :on 870605,ESF Switchgear Rooms Halon Sys Rendered Inoperable W/O Continuous Firewatch.Caused by Cognitive Util Personnel Errors.Work Authorizing Documents Rescheduled (← links)
- 05000483/LER-1987-019, :on 870817,personnel Discovered That Local Leak Rate Test Not Performed on 870508 When Flanges Reinstalled. Caused by Inadequate Surveillance Procedure.Task Sheets, Tracking Schedule & Procedures Revised (← links)
- 05000483/LER-1987-020, :on 870819,util Failed to Establish Continuous Firewatch within 1 H of Rendering Fire Sprinkler Sys Inoperable.Caused by Shift Supervisor Error.Event Discussed W/Supervisors & Procedures Will Be Revised (← links)
- 05000483/LER-1987-010, :on 870528,discovered That RHR Check Valves Not Tested as Required by Tech Spec 4.0.5.Caused by Personnel Error.Relief Requested for Testing Approved & Personnel Counseled (← links)
- 05000483/LER-1999-006, :on 990813,inadvertent Closure of Pump Suction Valve Occurred Due to Startup FW Pump Trip.Caused by Workman Protection Assurance Program Tag Created in Error.Procedure Re Reporting Requirements Will Be Revised.With (← links)
- 05000483/LER-1999-005, :on 990812,operating Conditions Exceeding Previously Analyzed Values Resulted in Inoperability of Both Offsite Sources.Caused by Inadequate Acs.Changed Transformer Tap Settings.With (← links)
- 05000483/LER-1999-003, :on 990811,pipe Rupture Occurred in Six Inch Drain Line Located Between D Moisture Separator Reheater First Stage Reheater Drain Tank.Caused by Flow Accelerated Corrosion.Ruptured Piping Replaced.With (← links)
- 05000483/LER-1999-004, :on 990808,discovered That Surveillance Test OSP-BG-V001C Did Not Adequately Test Closure of BG8497. Caused by Cognitive Personnel Error.Procedure Revised.With (← links)
- 05000483/LER-1987-003, :on 870402,reactor Protection Sys Actuation Occurred Due to Water Level in Steam Generator Decreasing lo-lo Level Trip Setpoint.Caused by Open Power Supply Breaker.Breaker Replaced & Workers Retrained (← links)
- 05000483/LER-1987-005, :on 870408,three Fire Suppression Water Sys Isolation Valves Discovered Omitted from Surveillance Procedure Used to Satisfy Tech Spec 4.7.10.1.1.e.Caused by Procedural Inadequacy.Valves Cycled on 870408 (← links)
- 05000483/LER-1987-004, :on 870404,while in Mode 5 Cold Shutdown, Release of Primary Coolant to Containment Environ Occurred. Caused by Inadequate Spec of Type of Connection to Be Used Between Pressurizer & Pressurizer Relief Tank (← links)
- 05000483/LER-1986-032, :on 860918,power-range Low Setpoint Not Verified Per Surveillance Requirements.Caused by Deficiencies in Surveillance Procedures.Mode Change Ltr Specifying Procedures Modified (← links)
- 05000483/LER-1986-038, :on 861107,containment Purge Isolation Signal & Control Room Ventilation Isolation Occurred Due to Increased Gaseous Radioactivity Levels in Containment.Caused by Unanticipated Leakage from Pressurizer PORV Block Valve (← links)
- 05000483/LER-1986-037, :on 861105,spurious Turbine Driven Auxiliary Feedwater Actuation Occurred.Possibly Caused by Failure of Input Buffer Card.Card Replaced & Sent to Vendor for Evaluation (← links)
- 05000483/LER-1987-009, :on 870507,during Auto Shunt Trip Test,Reactor Protection Sys Actuation Occurred & Feedwater Isolation Signal Received.Caused When Nonlicensed Operator Pressed Test Button for Wrong Reactor Trip Breaker (← links)
- 05000483/LER-1987-008, :on 870504,util Maint Electricians Blocked Open Fire Door W/O Establishing Continuous Fire Watch.Caused by Lack of Understanding of Tech Spec Requirements.Util Maint Personnel Counseled (← links)
- 05000483/LER-1987-007, :on 870504,control Room Ventilation Isolation Occurred When Test Probes of Digital Voltmeter Placed Across Incorrect Terminals in Solid State Protection Sys Cabinet. Caused by Personnel Error (← links)
- 05000483/LER-1986-036, :on 860321,two Sealed Sources Discovered Placed Into Use W/O Performing Leak Testing.Caused by Cognitive Personnel Error.Sealed Sources Leak Tested by Vendor Prior to Shipment (← links)
- 05000483/LER-1987-006, :on 870413,util Received Ltr from Westinghouse Re Inaccuracy in Tech Specs for Response Times Associated W/ Safety Injection Signal.Tech Spec Change Requested & Granted on 870504 (← links)
- 05000483/LER-1986-027, :on 860726,reactor Trip,Feedwater Isolation & Auxiliary Feedwater Actuation Occurred,Resulting from Turbine Trip.Caused by Actuating Mechanism Settings.Jumper Switch to Lockout Solenoid Valve Added (← links)
- 05000483/LER-1986-040, :on 861223,auxiliary Feedwater Actuation of motor-driven Auxiliary Feedwater Pump B Occurred.Caused by Inappropriate Human Performance.Event Discussed W/Operations Personnel (← links)
- 05000483/LER-1986-021, :on 860617,operations Personnel Failed to Restore Operability of Control Room HVAC Radiation Monitor within 1 H of Loss of Flow,Per Tech Spec 3.3.3.1.Monitor Filters Replaced & Personnel Counseled (← links)
- 05000483/LER-1997-008, :on 970909,SRO Not Present in Main Control Room During Mode 1 Operations Contrary to TS 6.2.2.b Due to Personnel Error.Caused by Lack of Effective Communication. Personnel Reminded of Need for Communication (← links)
- 05000483/LER-1986-035, :on 860928,containment Purge & Control Room Ventilation Isolation Occurred After Monitor GT-RE-32 Taken Out of Bypass.Caused by Random Fluctuations of Radioactivity Level.Plant Procedures Revised (← links)
- 05000483/LER-1986-033, :on 860920,control Room Ventilation Isolation Occurred.Caused by Blown Fuse on Control Room Radiation Monitor.Fuse Replaced.Monitor Restored.Downscale ESF Actuation Feature to Be Removed from Monitors (← links)
- 05000483/LER-1986-034, :on 860908,pre-action Sprinkler Sys Protecting Cable Trays of Auxiliary Bldg Inoperable W/O Continuous Fire Watch.Caused by Personnel Error.Design & Annunciator Response Procedure Evaluated (← links)
- 05000483/LER-1997-007, :on 970725,main Steam Safety Valve Setpoint Drift Was Outside Design Basis Requirements.Caused by Setpoint Drift or Variance.Valves Were Either Tested Satisfactorily,Reset or Reworked (← links)
- 05000483/LER-1997-006, :on 970719,degraded Field Supply Voltages & Loss of Several Main Control Board Annunciators Occurred. Caused by Lightning Strikes & Inadequate Procedural Guidance.Revised Applicable Procedures (← links)
- 05000483/LER-1986-029, :on 860825,reactor Manually Tripped Due to Rod Control Sys Failure Following Turbine Runback.Caused by Slave Cycler Control Card Failure.Card Replaced & Cooling to Rod Control Cabinets Increased (← links)
- 05000483/LER-1986-003, :an 860224,firewatch Requirements Not Met When Grinding Caused Smoke & Dust to Set Off Alarm.Caused by Need to Obtain Keys from Key Room & Slow Response Time.Keys Now Provided on Firewatch Key Rings (← links)
- 05000483/LER-1986-028, :on 860818,high Radiation Area Door Not Locked Per Tech Spec 6.12.2.Caused by Damaged Lock Mechanism.Latch Replaced,Other Locked Entrances Inspected & Plant Personnel Instructed in Operation of Locks (← links)
- 05000483/LER-1987-002, :on 870403,plant Shut Down Due to Inoperability of Diesel Generator a on 870401 & Fuel Oil Leak on Injector Pump Housing on 870402.Caused by Faulty Control Card plug-in Connections & Crack in Valve (← links)
- 05000483/LER-1986-022, :on 860621,reactor Trip Occurred as Result of Water Level in Steam Generator D Reaching lo-lo Level Trip Setpoint.Caused by Spurious slow-close Signal Generated by Valve Control Module.Faulty Module Replaced (← links)
- 05000483/LER-1986-041, :on 861231,containment Purge Isolation & Control Room Ventilation Isolation Occurred.Caused by Failure of Replaced Circuit Board.Replacement Circuit Board Removed & Original Circuit Board Reinstalled (← links)
- 05000483/LER-1986-039, :on 861019 & 20,liquid Radioactive Release from Discharge Monitor Tank Performed W/Liquid Radwaste Discharge Monitor at Trip Setpoint Less Conservative than Tech Specs. Caused by Software Error.Part 21 Related (← links)
- 05000483/LER-1986-042, :on 861222,Tech Spec Surveillance on Valve AL-HV-0034 Not Performed within Specified Time Interval. Caused by Personnel Error & Procedural Inadequacy. Surveillance Test Request Form Will Be Revised (← links)
- 05000483/LER-1999-001, :on 990119,failure to Implement Operating License Amend 106 Requirements within 30 Day Implementation Period Was Discovered.Caused by Programmatic Deficiency. Corrective Actions Implemented in Dec 1998.With (← links)
- 05000483/LER-1986-023, :on 860624,operations Discovered Containment Isolation Valves for Penetration 78 Opened on 860519 W/O Meeting Tech Spec Action Statement.Caused by Mgt Oversight. Draining Procedure Revised (← links)
- 05000483/LER-1998-003-01, Forwards LER 98-003-01 Re Inadvertent Actuation of ESFAS Due to a SG High Level During Refuel 9.Rept Is Submitted to Report Change in C/A from That Reported in Original Rept (← links)
- 05000483/LER-1986-017, :on 860521,inadvertent Reactor Protection Sys Logic Actuation Occurred as Result of source-range Hi Flux Reactor Trip Signal on Channel SE-NI-31 Due to Personnel Errors.Personnel Disciplined (← links)
- 05000483/LER-1988-012, :on 880904,main Turbine Trip Test Not Performed Due to Deficient Scheduling Mechanism Following Program Rev. Turbine Overspeed Protection Reliability Program Revised & Appropriate Individuals Counseled (← links)
- 05000483/LER-1986-011, :on 860416 & 17,continuous Sampling of Effluent Releases from Radwaste Bldg Vent Sys Not Performed.Caused by Isolation & Nonstarting of Radiation Sampler & Miscommunication.Procedures Revised (← links)
- 05000483/LER-1986-013, :on 860419,reactor Trip,Feedwater Isolation, Auxiliary Feedwater Actuation & Steam Generator Blowdown Isolation Occurred.Caused by Low Level in Steam Generator. Level Control Emphasized in Training (← links)
- 05000483/LER-1999-002, :on 990309,TS Surveillance Was Missed. Caused by Misinterpretation of Surveillance Requirement. Cisa Cpis & S/G Water Level low-low Mdafp Actuation Circuits Tested Satisfactorily.With (← links)
- 05000483/LER-1985-054, :on 851226,reactor Trip Occurred.Caused by Spurious Trip Generated by Loop 1 Over Temp Delta Temp Instrumentation.Circuit Card Generating Signal Replaced (← links)
- 05000483/LER-1985-044, :on 851003,07 & 08,ESF Actuated as Result of Steam Generator Levels Above hi-hi Trip Setpoint.Caused by Abnormal Component Conditions.Plant Placed in Stable Configuration.Startup Procedures to Be Revised (← links)
- 05000483/LER-1985-043, :on 851003,while Plant in Hot Standby,Hourly Firewatch Patrol Insp of Portion of Area Performed 1 H & 25 Minutes After Sprinkler Sys Declared Inoperable.Caused by Personnel Error.Personnel Retrained (← links)
- 05000483/LER-1985-040, :on 850910,firewatch Patrol Covering Portion of Containment Bldg Performed Late.Caused by back-to-back Firewatches,Causing Late Arrival at Access Area.Instructions Changed to Emphasize Allowing Ample Time (← links)
- 05000483/LER-1985-037, :on 850817,axial Flux Difference Outside Tech Spec Target Band for 135 Minutes.Caused by Operator Not Observing Control Board Crt.Personnel Received Addl training.Out-of-band Annunciator Added (← links)
- 05000483/LER-1986-025, :on 841203,851102 & 1203,plant Operated Above 100% Power Level.Caused by Incorrect Calorimetric & Feedwater Flow Instrument Drift.Power Maintained at Required Level & Design Change Evaluated (← links)
- 05000483/LER-1998-001-01, Forwards LER 98-001-01,being Submitted to Clarify Scope of Original Reviews Performed for Corrective Action Number 3 in LER 98-001-00.Reviews Have Identified Case of Failure to Properly Establish Equipment Operability (← links)
- 05000483/LER-1986-026, :on 860707,Tech Spec Surveillance of Large Stationary 125-volt Batteries Not Performed.Caused by Personnel Error.Personnel Reminded of Weekly Surveillance Responsibilities (← links)
- 05000483/LER-1986-008, :on 860403,control Room Emergency Ventilation Sys Train a Discovered Inoperable Since 860318.Caused by Procedural Deficiencies & Personnel Error.Procedures Revised & Personnel Reminded of Tech Spec Requirements (← links)
- 05000483/LER-1986-006, :on 860318 & 0406 Four ESF Actuations Occurred. One Actuation Caused by Loosened Connector.Three Actuations Caused by Spurious Signals During Gas Sampling Evaluations Due to Vacuum Sensing Circuitry Fault (← links)
- 05000483/LER-1998-002, :on 980115,determined That Missile Shield Had Not Been Closed During Past Eight Refueling Outages.Caused by TS Failing to Address Missile Shield During Refueling Outages.Developed Administrative Controls (← links)
- 05000483/LER-1986-020, :on 860614,containment Purge Isolations & Control Room Ventilation Isolations Occurred.Caused by Noble Gas Activity in Containment Due to Leakage from Pressurizer Level Transmitter Root Valve (← links)
- 05000483/LER-1986-004, :on 860307,reactor Protection Sys Logic Actuation Occurred.Caused by Spurious Electrical Noise in Source Range Cables.Personnel Directed to Use Local Grounds for Welding Activities (← links)
- 05000483/LER-1986-018, :on 860530,auxiliary Feedwater Actuation Occurred as Result of Main Feedwater Pump Trip Due to Initiation of Condenser Steam Sparging.Caused by Inadequate Procedural Controls & Tech Spec Violation (← links)
- 05000483/LER-1986-019, :on 860606,during Mode 1,reactor Trip Occurred on Low Pressurizer Pressure.Caused by Technician Deviation from Calibr Procedure.Progressive Discipline Administered. Guidelines Given to Technicians (← links)
- 05000483/LER-1997-009, :on 971014,determined That Callaway Plant Had Not Complied W/Ts 4.5.2.b.1 Requirement for Venting Pump Casings of HHSI Pumps Since Plant Startup.Caused by Misinterpretation of Ts.Plant Mod Implemented (← links)
- 05000483/LER-1998-010, :on 981120,re-evaluation Determined That Addl Valves Needed to Be Included in Noted TS Requirements. Caused by New Expanded Definition of in Flow Path. TS 4.0.3 Was Entered.With (← links)
- 05000483/LER-1986-014, :on 860419 & 22,while in Mode 1,containment Purge & Control Room Ventilation Isolations Occurred.Caused by Spikes Received on Containment Purge Sys Noble Gas Activity Monitors (← links)
- 05000483/LER-1997-011, :on 971029,failure to Enter TS Action Statement 3.8.1.1.b During a Train EDG Heat Exchanger Test,Was Discovered.Caused by PM Work Package.Differential Pressure Gauge Removed (← links)
- 05000483/LER-1985-046, :on 850928,Tech Spec Leak Rate Surveillances for Containment Personnel & Emergency Access Air Locks Not Performed on Due Dates of 850928 & 1005,respectively. Surveillances Completed on 851011 (← links)
- 05000483/LER-1997-010, :on 971118,inadequate Testing of Ssps Was Noted.Caused by Inadequate Vendor Testing Design/ Instructions of Subject Ssps Circuitry.Work Instructions Were Written to Test Affected Logic Circuits (← links)
- 05000483/LER-1997-005-05, Forwards LER 97-005-05,re Situation in Which Surveillances Required by TS Were Missed Due to Misintepretation of SR, Per 10CFR50.73(a)(2)(i)(B) (← links)
- 05000483/LER-1986-012, :on 860416,during Startup,Containment Atmosphere Radiation Monitors Inoperable During Containment Purge,Violating Tech Specs.Cause Not Stated.Personnel Counseled Re Necessity of Tech Spec Compliance (← links)
- 05000483/LER-1986-009, :on 860412,intermediate Head Safety Injection Trains Discovered Inoperable & Plant Entered Tech Spec 3.0.3.Caused by Personnel Error During Performance of Surveillance Procedure OSP-EP-V0003 (← links)
- 05000483/LER-1988-007, :on 880502,automatic Reactor Trip Occurred on Steam Generator Low Level B.Caused by Spurious Actuation of Main Throttle Pressure Limiter (Tpl).Tpl Bypassed Via Temporary Mod (← links)
- 05000483/LER-2020-002, Reactor Trip and AFW Actuation Following Spurious MFRV Closure (← links)
- 05000483/LER-1986-015, :on 860423,auxiliary Feedwater Actuation Sys & Steam Generator Blowdown Isolation Occurred.Caused by Radwaste Technician Unintentionally Opening Dc Fused Disconnect Switch.Incident Reviewed W/Staff (← links)
- 05000483/LER-1986-009-01, :on 860412,discovered That Both Intermediate Head Safety Injection Trains Inoperable.Caused by Util Personnel Error.Test Scheduled in Mode 4.Programmatic Controls Reemphasized (← links)
- 05000483/LER-1988-011, :on 880922,ESF Actuated When Spurious Turbine Driven Auxiliary Feedwater Actuation Occurred.Caused by Faulty Integrated Circuit Chip Failure.Relay Driver Card Replaced & Proper Operation Verified (← links)
- 05000483/LER-1988-010, :on 880902,unplanned Reactor Trip Occurred, Followed by Automatic Actuation of ESF & Auxiliary Feedwater & Feedwater Isolation.Caused by Personnel Error & Leaking Valve.Switchgear Doors Will Be Locked (← links)
- 05000483/LER-1988-009, :on 880823,discovered That Excore Neutron Monitoring Sys Power Range Channels Not Surveilled Before Late Finish Time.Caused by Operator Error.Missed Surveillance Completed & Event Reviewed (← links)
- 05000483/LER-1988-006, :on 880421,manual Reactor Trip Initiated Immediately Following Failure of Main Feedwater C Regulating Valve AE-FE-530.Caused by Matl Fatigue of Roll Pin Which Secures Valve Plug to Valve Stem.Pin Replaced (← links)
- 05000483/LER-1988-005, :on 880416,feedwater Isolation & Auxiliary Feedwater Actuation Occurred on High Level Steam Generator. Caused by Personnel Error.Procedures for Feedwater Regulator Valves to Feedwater Bypass Valves Revised (← links)
- 05000483/LER-1998-009, :on 960830,potential for Inadequate Guidance for Safe Shutdown During Fire Requiring CR Evacuation Noted. Caused by Inadvertent Deletion of Required ACs During Procedure Rev.Revised Appropriate Procedure.With (← links)
- 05000483/LER-1986-001, :on 860119,at 100% Power,Esf Actuation Occurred.Caused by Restoration of Power to Containment Purge Radiation Monitor Due to Failure to Place Monitor in Bypass.Technicians Counseled (← links)
- 05000483/LER-1988-008, :on 880630,sampling Not Performed on Radwaste Bldg Vent Noble Gas Radiation Monitor.Caused by Random Access Memory Integrated Circuit Failure of Microprocessor Circuit Board.Work Request Initiated (← links)
- 05000483/LER-1984-033, :on 840816 & 24,packing Adjusted on Containment Isolation Valves W/O Performing Retest within Time Constraints of Tech Specs.Caused by Personnel Error.Valves Retested.Personnel Trained & Procedure Revised (← links)
- 05000483/LER-1988-002, :on 880107,two RHR Trains Rendered Inoperable When Operator Inadvertently Closed cross-connect Valve. Caused by Control Switches Being in Close Proximity to Each Other.Control Switches Covered W/Plastic (← links)
- 05000483/LER-1994-002, :on 940708,both Trains of Hhsis Were Rendered Inoperable in Order to Facilitate Mod to Leaking Bit Relief Valve EM8852.Caused by Seat Leakage Past Bit Relief Valve EM8852.EM8852 Was Removed & Replaced W/Flange (← links)
- 05000483/LER-1988-001, :on 880104,reactor Tripped on Low Steam Generator Level Oscillations During Troubleshooting of Faulty Amber Light Condition for Main Feedwater Isolation Valve.Caused by Blown Fuse.Fuse Replaced (← links)
- 05000483/LER-1997-004, :on 970404,TS 4.3.2.1 Turbine & Feedwater Pump Trip Slave Relay Surveillance Was Missed.Caused by Cognitive Personnel Error.Task Sheets for Associated Surveillances Modified to Ensure K620 Is Tested (← links)
- 05000483/LER-1988-003, :on 880202,discovered That Containment High Range Radiation Monitor Had Missing Heat Shrink Moisture Seals.Caused by Failure of Architectural Engineer to Identify Need for Seals (← links)
- 05000483/LER-1986-005, :on 860316,during Reenergization of Startup Transformer Inadvertent Isolations Occurred.Caused by Procedural Deficiency Resulting in Loss of Power to Radiation Monitors.Procedure Revised (← links)
- 05000483/LER-1997-003, :on 970331,TS Table 3.3-3 Violation Was Noted Due to Error in TS Description for turbine-driven AF Pump Start Logic.License Amend Process Improvements Have Been Implemented Since Time Error Occurred (← links)
- 05000483/LER-1984-062, :on 841207,inadvertent ESF Actuation Resulted in Containment Purge Isolation Signal & Control Room Ventilation Isolation Signal.Caused by Blown Fuse.Fuse Replaced (← links)
- 05000483/LER-1985-035, :on 850624,0726 & 0801,while at 100% Reactor Power,Several Violations of Tech Spec 3.7.11 Occurred.Caused by Personnel Error.Fire Barrier Procedures Will Be Reviewed. Addl Training Will Be Provided (← links)
- 05000483/LER-1985-050, :on 851127,control Room Ventilation Isolation & Containment Purge Isolation Signal Occurred.Caused by Failed Microprocessor Fuse for Radiation Monitor & Tripped Breaker.Fuse Replaced & Breaker Closed (← links)
- 05000483/LER-1985-042, :on 851002,feedwater Isolation,Auxiliary Feedwater Actuation & Steam Generator Blowdown Isolation Occurred as Result of Reactor Trip.Caused by Personnel Troubleshooting During RCS Test (← links)
- 05000483/LER-1985-049, :on 851111,turbine Trip/Reactor Trip Occurred as Result of High Stator Cooling Water Temp When Stator Cooling Water Temp Control Valve Inadvertently Stroked to Full Bypass.Caused by Equipment Failure (← links)
- 05000483/LER-1985-048, :on 851102,reactor Tripped Due to High Negative Flux Rate.Caused by Dropped Control Rod Bank Resulting from Failed Rod Control Power Cabinet Card.Cards Returned to Westinghouse.Procedures Revised (← links)
- 05000483/LER-1997-002, :on 970307,missed TS 4.6.3.1 Surveillance of Containment Isolation Valves Following Maintenance Occurred Due to Cognitive Personnel Error.Applicable Requirements Have Been Discussed with Individual Involved (← links)
- 05000483/LER-1997-001, :on 970228,violation Occurred Re Misinterpretation of TS 3.9.6,refueling Machine Trip Limits. TS Interpretation 25 Has Been Deleted (← links)
- 05000483/LER-1985-053, :on 851209,discovered That Penetration 98 (P-98) Not Included in Surveillance Procedure Used to Satisfy Tech Spec 3/4.6.1.1.Caused by Personnel error.P-38 Verified Closed.Procedure Will Be Revised (← links)
- 05000483/LER-1985-051, :on 851208,reactor Trip Occurred as Result of High Negative Flux Rate.Caused by Rapid Power Reduction Initiated in Response to Main Feedwater Pump a Fluctuations. Rod Insertion Rate Restricted (← links)
- 05000483/LER-1985-052, :on 851209,reactor Tripped Twice Due to Water Level in Steam Generators Reaching lo-lo Level Trip Setpoint.Caused by MSIV Fast Closure Due to Circuit Card Failure.Circuit Card Replaced (← links)
- 05000483/LER-1985-047, :on 851018,plant Continued Operations W/Centrifugal Charging Pumps Inoperable,Violating Tech Specs.Pump B Failure Caused by Broken Room Cooler Drive Belts.Belts Replaced.Pump a Maint Completed (← links)
- 05000483/LER-1985-045, :on 851016,portion of Sprinkler Sys for Auxiliary Bldg Elevation 2000 Ft Cable Trays Rendered Inoperable During Surveillance Testing.Caused by Failure of Supervision Actuation Module (← links)
- 05000483/LER-1996-004, :on 961109,manual Reactor Trip Occurred During Rod Drop Testing Due to Digital Position Indication Sys Failure.Caused by Worn Pin in Amphenol Connector in Drpi Terminal Box.Pins Repaired (← links)
- 05000483/LER-1984-004, :on 840617,ESFAS Inadvertently Actuated.Caused by Spurious Electronic Signals & Incompatibility Between Software & Hardware in RM-80 Microprocessing Unit for Radiation Monitors.Sys Reset (← links)
- 05000483/LER-1985-003, :on 850115-24,spurious Control Room Ventilation Isolation Signals Occurred.Caused by Incompatibility Between Software & Hardware in Microprocessing Unit for Radiation Monitor.Necessary Hardware Installed (← links)
- 05000483/LER-1985-036, :on 850731,reactor Trip Resulted from Low Steam Generator Level,Due to Inadvertent Main Feedwater Isolation Valve Closure.Caused by Operator Inadvertently Depressing Control Switch for Valve (← links)
- 05000483/LER-1996-003, :on 961012,auxiliary Feedwater Actuation After Main Feedwater Pump a Trip on High Discharge Pressure Occurred.Caused by Unanticipated Heatup & Pressurization of Isolated Feedwater Pipe.Procedures Revised (← links)
- 05000483/LER-1985-034, :on 850718,trip Occurred as Result of Power Range High Negative Flux Rate Signal.Caused by Inadequate Cooling of Rod Drive Power Cabinet.Caution Tag Added to Handswitch Controlling Room Cooler (← links)
- 05000483/LER-1985-032, :on 850715,alarm in Fire Detection Zone 308 Activated by Cooking in Control Room Pantry But Not Reset. Remaining Zone 308 Fire Detectors Inoperable.Alarm Reset.Mod Request Initiated (← links)
- 05000483/LER-1996-008, :on 961223,missed TS 4.8.2.1.a Surveillance of 125-VDC Batteries Due to Cognitive Personnel Error. Individual Involved Has Been Counseled on Importance of Attention to Detail & Self Checking (← links)
- 05000483/LER-1996-007, :on 961211,missed Surveillance & Literal TS Compliance Violations Occurred Due to Personnel Oversight. EGFT0062 Surveillance Testing Has Been Changed & Placed in Surveillance Tracking Program (← links)
- 05000483/LER-1985-033, :on 850716,Door U3071 Separating Two Fan Rooms in Essential Svc Water Cooling Tower Not Included in Surveillance Procedures,Per Tech Spec 3/4.7.11.Hourly Fire Watch Established (← links)
- 05000483/LER-1996-006, :on 961205,turbine Trip & Engineered Safety Features Actuations Occurred Due to B Steam Generator High Level.Turbine Generator Power Was Stabilized at 60 Mwe Until Feedwater Preheating Was Recovered (← links)
- 05000483/LER-1985-025-01, Forwards LER 85-025-01 Re Intermediate Range High Flux Reactor Trip Caused by Blown Fuse in ex-core Neutron Monitoring Channel.Expected Submission Date of Supplemental Rept Amended Due to Continuing Investigation (← links)
- 05000483/LER-1985-030, :on 850617,pressurizer Vapor Sample Outer Containment Isolation Valve Not Tested within Required Tech Spec Frequency Extension Limits.Caused by Personnel Error. Personnel Counseled (← links)
- 05000483/LER-1985-031, :on 850620,lo-lo Level in Steam Generator Initiated Reactor Trip Auxiliary Feedwater Actuation Signal & Steam Generator Blowdown Isolation Signal.Caused by Personnel Error.Procedure Revised (← links)
- 05000483/LER-1985-027, :on 850530,determined That Two RCS Cold Leg Injection Pathways Isolated,Per Surveillance Procedure OSP-EJ-P001A.Caused by Misinterpretation of Operability Criteria for RHR Sys (← links)
- 05000483/LER-1985-028, :on 850529,sample Line Disconnected from Suction of Sample Pump for Maint & Not Reconnected Until Discovery on 850611.Caused by Personnel Error.Technicians Reinstructed (← links)
- 05000483/LER-1985-039, :on 850820,main Turbine Tripped on Moisture Separator Reheater B hi-hi Level.Caused by Failure to Respond to Moisture Separator Reheater B Drain Tank High Level Alarm During Startup (← links)
- 05000483/LER-1996-005, :on 961111,turbine Trip & Engineered Safety Features Actuations Occurred Due to Steam Generator a High Level Followed by Plant Shutdown Due to High Vibration on Reactor Coolant Pump B (← links)
- 05000483/LER-1985-029, :on 850607,personnel Failed to Meet Surveillance Requirements in Tech Spec 4.6.1.3 for Emergency Access Hatch.Caused by I & C Dept Technician Error.Field Personnel Cautioned to Review Packages (← links)
- 05000483/LER-1985-026, :on 850607,reactor Trip Occurred Due to High Negative Flux Rate.Caused by Thyristor Bank Insulator Failure.Thyristor Bank & Power Supplies Replaced (← links)
- 05000483/LER-1985-024, :on 850506,reactor Trip/Turbine Trip Occurred as Result of Steam Generator lo-lo Level Signal.Caused by Electronic Failure in Governor Controller of Main Feedwater Pump B.Component Replaced (← links)
- 05000483/LER-1985-023, :on 850413,17 & 0506,containment Purge & Inadvertent Control Room Ventilation Isolation Signals Received.Caused by Faulty Vacuum Transducer.Transducer Mod Initiated (← links)
- 05000483/LER-1985-022, :on 850410,output Breaker for Motor Generator Set 2 Tripped Open Causing Shutdown Banks to Drop.Reactor Trip Breakers Manually Opened.Caused by Exciter Overcurrent Condition W/Bus Overvoltage Condition (← links)
- 05000483/LER-1992-009, :on 920807,discovered That Manual Reactor Trip Breaker Handswitch Contacts Inadequately Tested Per TS 4.3.1.1,Functional Unit 1.Caused by Incomplete Procedure. Procedure Request Form Revised in Jul 1988 (← links)
- 05000483/LER-1992-012, :on 921030,ESW UHS Cooling Tower Train B Approx 25% Open When Remote Valve Position Indications Indicated Closed.Caused by Personnel Error.Requalification Training Will Be Provided to Supervisors (← links)
- 05000483/LER-1985-021, :on 850404,spacing Between Batteries End Cells & Stringers Did Not Meet Specified Criteria.Caused by Deficient Drawings.Fire Retardant Plywood Spacers Installed Between Battery End Cells & Stringers (← links)
- 05000483/LER-1985-018, :on 850329,diesel Generator B Inadvertently Started During Surveillance Testing of Load Shedder & Emergency Load Sequencer.Caused by Technician Error. Technician Counseled & Cabinets Labeled (← links)
- 05000483/LER-1985-019, :on 850330,inadvertent Actuation of Safety Injection Occurred During Planned Shutdown.Caused by 10 to 15 Psi Drop in Steam Pressure,Amplified by Rate Compensation.Operating Procedure Amended (← links)
- 05000483/LER-1985-020, :on 850208,Fire Door 14031 Opened W/O Providing Required Continuous Fire Watch W/Backup Fire Suppression. Caused by Personnel Error.Interpretation Re Cascading Tech Spec Statements Deleted (← links)
- 05000483/LER-1992-011, :on 921017,four Field Contact Power Supply Output Fuses Blew Causing All Mcb Annunciators Inoperable. Caused by Short in Power Transformer.Mod Will Be Evaluated to Improve Reliability of Rk Sys (← links)
- 05000483/LER-1985-017, :on 850322,Bechtel Notified Util of Discrepancies Between Plant Design & FSAR Commitments to Reg Guide 1.63 Re Overcurrent Protection of Containment Penetrations.Designs Modified Per Reg Guide (← links)
- 05000483/LER-1984-028, :on 840813,inadvertent Safety Injection Occurred.Caused by Failed Redundant Pressure Loop Going Undetected Due to Failed Lamp on Partial Trip Status Panel. Lamp Replaced (← links)
- 05000483/LER-1992-010, :on 920920,plant Experienced Turbine Trip When Lockout Relay Contact Failed in Main Turbine Thrust Bearing Wear Detector Test Circuitry.Lockout Relay Replaced & Test Frequencies Will Be Adjusted (← links)
- 05000483/LER-1984-065, :on 841217 & 18,ESFs Actuated by Steam Generator Level Oscillations.First Event Caused by Failed Current Pressure Converter.Second Event Caused by Control Valve Not Seating Properly (← links)
- 05000483/LER-1984-064, :on 841217,reactor Trip Received on Rapidly Decreasing Pressurizer Pressure.Caused by Lifting of PORVs & Fully Opened Pressurizer Spray Valves.Test Procedure Revised & Test Repeated Successfully (← links)
- 05000483/LER-1985-012, :on 850222,turbine Trip Occurred Due to hi-hi Level Signal on Steam Generator D.Caused by Steam Flow/ Feedwater Flow Recorder AE-FR-544 Not Operating Properly. Recorder Will Be Repaired (← links)
- 05000483/LER-1985-007-01, :on 850201,six Limitorque Valves Declared Inoperable.Caused by Terminal Blocks Not Complying W/Generic Ltr 84-24 & IE Info Notice 83-72.Terminal Blocks Replaced & Valves Environmentally Qualified (← links)
- 05000483/LER-1985-011, :on 850222,reactor Manually Tripped & Emergency Diesel Generator B Started & Loaded When Startup Transformer Lost.Caused by Interlock Between Transformer & Deluge Sys Due to Water Leakage & Power Loss to Rods (← links)
- 05000483/LER-1984-063, :on 841209,ESF Inadvertently Actuated.Caused by Spurious Signals from Control Room Radiation Monitor. Radiation Monitor Returned to Svc (← links)
- 05000483/LER-1996-002-01, :on 931112,notified of Potential Problem W/ Accuracy of Butterfly (Valve) Analysis & Review Test Sys. Caused by Original Accuracy Data Being Nonconservative. Butterfly Valves Evaluated W/New Accuracy Data (← links)
- 05000483/LER-1984-049, :on 841009 & 25,steam Generator B Main Steam Outlet Pressure Indicator & Condensate Storage Tank to Auxiliary Feedwater Pump Suction Header Pressure Indicator Found to Be Outside Tech Spec Limits (← links)
- 05000483/LER-1984-061, :on 841129,reactor Trip Occurred from 80% Rated Thermal Power Because of Turbine Trip.Load Ctr from 480-volt nonsafety-related Transformer Removed from Svc Tied to Redundant Transformer,Causing Overload (← links)
- 05000483/LER-2020-001, Emergency Exhaust Train Inoperable Due to Fan Belt Degradation and Failure (← links)
- 05000483/LER-1984-059, :on 841105 & 06,reactor Tripped & ESF Actuated Due to Failure of Air Lines Supplying Steam Generator Feedwater Regulating Valves.Caused by Improper Matl Applications & Fatigue Cracking on Air Lines (← links)
- 05000483/LER-1996-001, :on 960402,licensed Operators Initiated Manual Reactor Trip After Failed Fuse Caused Closure of B Feedwater Isolation Valve.Caused by Mechanical Failure of Thermal Link Inside Fuse.Fuses Replaced (← links)
- 05000483/LER-1984-048, :on 841006,11 & 22,feedwater Isolation Signal Generated When Reactor Trip Breaker a Immediately Reopened When Operators Tried to Close Reactor Trip Breakers.Cause Uncertain.Followup to Be Issued by 850201 (← links)
- 05000483/LER-1984-046, :on 841005,reactor Trip Occurred & Listed ESFs Inadvertently Actuated Due to Low Level Signals Received from Steam Generator B Level Transmitters.Cause Unknown (← links)
- 05000483/LER-1984-047, :on 841006,removal of Control Power Fuses Initiated Source Range Hi Flux Signal Causing Reactor Trip & Feedwater Isolation.Caused by Personnel Error.Rev to Administrative Procedure Being Reviewed (← links)
- 05000483/LER-1984-011, :on 840704,containment Purge Isolation & Control Room Ventilation Isolation Signals Actuated by Radiation Alarm from Loss of Power to Radiation Elements GT-RE-31 & 33.Info Deleted (← links)
- 05000483/LER-1984-045, :on 840930,feedwater Isolation Signal Received as Result of Reactor Trip Signal & Low RCS Average Temp. Caused by Reactor Trip Bypass Breaker Locally Closed But Immediately Reopened (← links)
- 05000483/LER-1985-006, :on 850122,inadvertent Control Room Ventilation Isolation Actuation Generated.Caused by Removal of Power Supply to Iodine Channel.Future Work on Equipment Will Be Preceded by Bypasing ESF Channels (← links)
- 05000483/LER-1984-042, :on 840923,unplanned Reactor Trip & Feedwater Isolation Signal Occurred During Testing of Power Range Nuclear Instrumentation.Caused by Detector Input Cables Incorrectly Removed from Channel (← links)
- 05000483/LER-1985-002, :on 850107,reactor Tripped from 50% Power Due to Turbine Trip.Caused by Spurious High Vibration Signal. High Vibration Turbine Trip Circuitry Modified (← links)
- 05000483/LER-1984-040, :on 840915,feedwater Isolation Occurred Due to High Level Signals Received from Two Steam Generator Level Indicators.On 841010,reactor Trip,Feedwater Isolation & Auxiliary Feedwater Actuation Occurred (← links)
- 05000483/LER-1984-039, :on 840915,analog Channel Operational Test of Load Shedder & Emergency Load Sequencer Failed Due to Lack of 48-volt Dc Output from Undervoltage Power Supply Assembly.Channel Placed in Tripped Position (← links)
- 05000483/LER-1984-038, :on 840906 & 11 & 841004,wrong Gas Decay Tank Sampled.Upon Discovery,Sampling Switched to on-line Gas Decay Tank.Caused by Lack of Communication.Radwaste off-normal Operating Procedure Issed (← links)
- 05000483/LER-1984-066, :on 841228,discovered That Required Leak Tests of Sealed Sources,Contained in Two Troxler Density Gauges, Not Performed within 6-month Test Frequency Specified by Tech Specs.Qc Procedure QCP-ZZ-07000 Revised (← links)
- 05000483/LER-1985-001-01, :on 850102,inadvertent Steam Generator lo-lo Level Reactor Trip Occurred.Feedwater Isolation Valve Fast Closed.Caused by Failed Solenoid in Valve Control Circuit (← links)
- 05000483/LER-1984-067, :on 841230 & 850109,containment Purge Isolations & Control Room Ventilation Isolations Occurred Due to Downscale Trips.Caused by Loose Fuse Clip to Microprocessor.Clip Tightened (← links)
- 05000483/LER-1992-008, :on 920305,boron Dilution Mitigation Sys Inoperability Noted.Caused by Design Oversight.Modification to Bdms & Revision of Bdms Setpoint Initiated (← links)
- 05000483/LER-1992-007, :on 920523,SG C FWIV,AEFV0041,fast Closed Causing Low Level SG Reactor Trip & Subsequent FW Isolation. Caused by Failure of Relay Driver Card in Ms & FW Isolation Sys Train a Cabinet.Card Replaced (← links)
- 05000483/LER-1984-051, :on 841014,feedwater Isolation Signal Received When hi-hi Steam Generator Level Signal Generated.Caused by Improper Operator Control of Steam Dumps Due to Infrequent Use (← links)
- 05000483/LER-1984-060, :on 841114,high Steam Generator Level Caused Reactor Trip,Feedwater Isolation,Auxiliary Feedwater Actuation & Steam Generator Blowdown Isolation (← links)
- 05000483/LER-1984-059-01, :on 841105 & 06,air Lines Supplying Steam Generator Feedwater Regulating Valve Failed Resulting in ESF Actuations Along W/Reactor Trips.Caused by Improper Matl Applications.Bypass Tubing Nipples Replaced (← links)
- 05000483/LER-1984-058, :on 841030,feedwater Isolation,Auxiliary Feedwater Actuation & Steam Generator Blowdown Isolation Signals Initiated by High Level on Steam Generator B.Caused by Transient Initiated by Spurious High Signal (← links)
- 05000483/LER-1985-015, :on 850228,failure to Perform 850225 Tritium Sampling Discovered.Sample Collected,Analyzed & Found within Tech Spec Limit.Tracking Sys for Tech Spec Surveillance Requirements Modified (← links)
- 05000483/LER-1985-014, :on 850227,control Room Ventilation Isolation Signal Occurred.Cause Undetermined.Incident Considered Isolated Event W/No Further Corrective Action Required (← links)
- 05000483/LER-1985-013, :on 850226,mini-purge Commenced W/Containment Atmosphere Monitors in Bypass.Caused by Inadequate procedure.Mini-purge Terminated.Procedures Re Backup Monitor Operability During mini-purge Revised (← links)
- 05000483/LER-1985-016, :on 850303,reactor Trip Occurred on Low Pressurizer Pressure.Caused by Sticking Valve Diaphragm. Transmitters Will Be Pressurized to Approx Sys Pressure Prior to Opening Isolation Valves (← links)
- 05000483/LER-1985-010, :on 850331,ESFs Actuated Due to Low Steam Generator Levels.Caused by nonsafety-related 120-volt Ac Instrument Bus Deenergized Due to Faulty Transformers. Transformers Replaced (← links)
- 05000483/LER-1985-004, :on 850125 & 0202,control Room Ventilation & Containment Purge Isolations Occurred.Caused by Incorrect High Radiation Signals Due to High Vacuum at Inlet Sample Line to Containment Process Monitor (← links)
- 05000483/LER-1985-009, :on 850215,Train a of Control Room Emergency Ventilation Sys Declared Inoperable Due to Absence of Flow Restricting Orifice.Caused by Discrepancy Between Tech Spec Flow & Design Flow (← links)
- 05000483/LER-1984-025, :on 840810,inadvertent ESF Actuation Signal Occurred Due to Spurious Spike on Radiation Monitor GT-RE-22.Caused by Noisy Gaseous Channel Detector Tube. Scintillator & Tube Assembly Replaced (← links)
- 05000483/LER-1984-057, :on 841027,reactor Trip,Feedwater Isolation Auxiliary Feedwater Actuation & Steam Generator Blowdown Isolation Occurred as Result of Low Level in Steam Generator A.Caused by Blown Fuse (← links)
- 05000483/LER-1984-055, :on 841021,unplanned ESF Actuated Occurred Due to High Level Signal on Steam Generator A.Caused by Inadequate Preplanning.Procedure Rev Developed (← links)
- 05000483/LER-1984-052, :on 841016,switchyard Bus Inadvertently Isolated Causing Undervoltage on Corresponding ESF Bus & Manual Reactor Trip.Caused by Inadequate Breaker Failure Control Scheme.Scheme Under Evaluation for Mod (← links)
- 05000483/LER-1985-007, :on 850201,while Reviewing Compliance W/Generic Ltr 82-24, Environ Qualification of Electrical... & IE Info Notice 83-72 Re Environ Testing,Six Valves Discovered W/Unqualified Terminal Blocks (← links)
- 05000483/LER-1984-054, :on 841019 & 21,power Range Nuclear Instrumentation Channels Caused Fluctuations in Steam Generator Water Levels.Caused by High Gain Input to Steam Generator Level Control Circuitry (← links)
- 05000483/LER-1984-053, :on 841017,discovered That Required Grab Sample Not Taken in Preceeding 24 H Period.Caused by Failure to Update Status Board Used to Schedule Grab Samples.Personnel Counseled & Retrained (← links)
- 05000483/LER-1985-008, :on 850125,during Stroke Testing of Block Valve,Containment Purge & Control Room Ventilation Isolations Occurred.Caused by Increase in Gaseous Activity. Monitors Bypassed (← links)
- 05000483/LER-1985-005, :on 850131,reactor Trip Occurred.Caused by Generator Trip Due to Loss of Field to Main Generator. Operators Verified Indications & Initiated Recovery Procedures (← links)
- 05000483/LER-1984-034, :on 840822,loss of Main Feed Pump Block Window Annunciated & Auxiliary Feedwater Actuation Signal Inadvertently Initiated.Caused by Personnel Error.Personnel Counseled (← links)
- 05000483/LER-1984-036, :on 840824 & 0914,unplanned ESF Actuations Occurred Due to Spiking Problems Associated W/Radiation Monitor GK-RE-4.Personnel Involved Counseled (← links)
- 05000483/LER-1984-032, :on 840820,control Room Ventilation,Containment Purge & Fuel Bldg Ventilation Isolations Actuated.Caused by Failed 15-volt Dc Power Supply in ESF Actuation Sys Cabinet. Power Supply Replaced (← links)
- 05000483/LER-1984-027, :on 840813 & 17,personnel Inadvertently Removed Power from Radiation Monitors,Resulting in ESF Actuations. Personnel Counseled to Use Utmost Caution When Performing Tests or Maint (← links)
- 05000483/LER-1992-006, :on 920515,main Feedwater Isolation Signal Noted Due to Spurious Opening of Main Steam Dump.Personnel Investigated Potential Causes of Event (← links)
- 05000483/LER-1984-030, :on 840816,discovered That Average of Only Three Cooler Inlet Temps Taken,Violating Tech Specs.Caused by Operators Misinterpreting Tech Spec Requirements.Night Order Issued to Clarify Tech Spec Requirement (← links)
- 05000483/LER-1984-029, :on 840814,containment Spray Manual Isolation Valves Discovered in Locked Closed Position,Rendering Containment Spray Sys Inoperable.Valves Not Entered in Equipment out-of-svc Log.Valves Opened (← links)
- 05000483/LER-1984-026, :on 840811,w/diesel Generator a Inoperable, Verification of Correct Breaker Alignments Not Performed within 1 H to Show Operability of Offsite Ac Circuit.Caused by Personnel Oversight (← links)
- 05000483/LER-1992-005, :on 920410,auxiliary Feedwater Swapover to ESW Occurred When Instrument AC Power Bus Was de-energized W/ ESFAS Cabinet de-energized.Caused by Undervoltage Condition on Bus.Procedures Will Be Revised (← links)
- 05000483/LER-1992-004, :on 920320,auxiliary Feedwater Actuation Signal Occurred When Licensed Operators Secured B Main Feedwater Pump.Caused by Main Turbine Vibration During Plant Shutdown. Plant Procedures Will Be Revised (← links)
- 05000483/LER-1984-016, :on 840717,RCS Depressurized to 0 Psig & Primary Seal on Reactor Coolant Pump C Damaged.Caused by Improper Sequence of Valve Operation on RHR Pump a Procedure Restoration.Seal Replaced (← links)
- 05000483/LER-1984-018, :on 840718,fuel Bldg Isolation & Control Room Ventilation Isolation Signals Initiated from Radiation Monitoring Elements.Caused by Brief Voltage Abnormality During Bus Realignment.Design Change Requested (← links)
- 05000483/LER-1984-021, :on 840719,Train a of Ssps Found in Inhibit Mode W/Train B in Test.Train B Returned to Normal. Surveillance Procedure Changed (← links)
- 05000483/LER-1984-014, :on 840714,high Flux at Shutdown Alarm Received from Source Range Monitor SE-NI-31B.Caused by Dirt & Moisture on Source Range Monitor Cable Connectors.Connectors Cleaned & Dried.Unit Functioned Satisfactorily (← links)
- 05000483/LER-1984-015, :on 840716,pressure Transient Occurred in RCS as Result of Loss of Instrument Air.To Reduce Pressure,Porv Cycled Manually.Instrument Air Lost Again & PORV Actuated Automatically (← links)
- 05000483/LER-1984-019, :on 840719,fuel Bldg Ventilation Isolation Signal Actuated by Fuel Bldg Radiation Monitor Alarm.Caused by Monitor Not Powered & Feeder Breaker Accidentally Opened. Radiation Monitor Restored (← links)
- 05000483/LER-1995-006, :on 951002,plant Had to Be Shutdown Due to Excessive RCS Leakage & FW Isolation Signal Due to High SG Level.Applied Weld Overlay Per ASME Code Case N-504 (← links)
- 05000483/LER-1984-006, :on 840618,sample Pump for Vent Wide Range Gas Monitor Turned Off,Causing Alarm.Caused by Operator Error. Alarm Response Procedure Issued for RM-11 & RM-23 Radiation Monitor Control & Display Modules (← links)
- 05000483/LER-1984-043, :on 840925,four Steam Line Low Pressure Channels Declared Inoperable.Caused by Setpoints on Each lead-log Controller Being Incorrectly Calibr.Incorrect Procedure Revised & Affected Loops Recalibr (← links)
- 05000483/LER-1984-035, :on 840907,one of Two Level Indicators Failed, Causing Feedwater Isolation Actuation.Caused by Instrument Valve Manifold Leakage.Manifold Replaced & Procedures Revised to Include Pertinent Caution Statement (← links)
- 05000483/LER-1984-003, :on 840615 & 0712,containment Purge Isolation & Control Room Ventilation Isolation Signals Actuated by Spurious Containment Radiation Alarm (← links)
- 05000483/LER-1984-001, :on 840612,hourly Fire Watch Patrols for Four Rooms in Control Bldg Missed.Caused by Door Locks Being Changed to Coincide W/Receipt of OL & New Keys Not Issued Promptly.Appropriate Keys Issued (← links)
- 05000483/LER-1992-003, :on 920123,during Startup,Closure of Feedwater Bypass Control Valves to Control SG Level Led to Turbine Trip.Caused by Attempt to Maintain Reactor/Turbine Power at Low Loads.Ts 3.2.2 to Be Revised (← links)
- 05000483/LER-1992-001, :on 910912,licensed Operators Performed TS 4.7.7 Surveillance of Train a Emergency Exhaust Sys for Only 9 H & 21 Minutes.On 920121,discovered Flow Not Maintained Through Exhaust.Individuals Coached (← links)
- 05000483/LER-1992-002, :on 920122,reactor Trip on Coolant Sys Loop Low Flow Signal Due to Worker Inadvertently Bumping Open Instrument Valve.Evaluation of Methods to Further Visually Identify to Plant Personnel Loop Flow (← links)
- 05000483/LER-1995-005, :on 950816,RT Occurred Due to Turbine Trip at Greater than 50% Reactor Power Due to Loss of Condenser Vacuum.Replaced Pump Rheostat & Recalibr Transmitted for C-9 Loops & Main Turbine Trip Switches (← links)
- 05000483/LER-1991-007, :on 911113,potential Concern Existed W/Ability to Satisfy 1352 Kw ESW Pump Load Rejection Requirement of TS Due to Incorrect ESW Pump Load Value Specified in Ts. Emergency TS Change Request Submitted (← links)
- 05000483/LER-1991-006-01, :on 911105,reactor Trip Occurred Due to Failure of Gating Sequencing Card in Inverter Supplying 120 Volt AC Safety Related Instrument Bus.Cause of Card Failure Unknown. Procedures Will Be Developed (← links)
- 05000483/LER-1984-007, :on 840618,unit Vent wide-range Gas Monitor (WRGM) Alarmed on Low Flow Due to Turned Off Sample Pump. Caused by Operator Error.Sample Pump Started,Reinitializing Sample Flow from Unit Vent WRGM (← links)
- 05000483/LER-1991-008-01, :on 911210,review of Sp OSP-GP-00001,revealed That RHR Pump a Suction Header Vent Valve Had Not Been Verified as Locked Prior to 890314 Due to Incorrect Lock Valve List.Surveillance Procedures Revised (← links)
- 05000483/LER-1991-008, :on 911210,review of Sp OSP-GP-00001 Revealed That RHR Suction Header Vent Valve Had Not Been Verified as Locked Closed Prior to 890314 Due to Incorrect Locked Valve List.Subj Procedure Revised (← links)
- 05000483/LER-1991-006, :on 911105,reactor Trip Occurred Due to Failure of Gating/Sequencing Card in Inverter for 120 Volt Ac Instrument Bus.Card Will Be Sent to Vendor for Testing.W/ (← links)
- 05000483/LER-1991-005, :on 911011,discovered That TS Normal & Emergency Personnel Containment Air Lock Door Interlock Test Not Performed Since 911006.Caused by Human Error.Step Added to Procedure Request Form (← links)
- 05000483/LER-1995-004, :on 950608,reactor Trip Automatically Initiated Due to Low Flow of RCS & Subsequent Trips of Pumps.Caused by Tree Limb on One Set of Transmission Lines. Limb Removed (← links)
- 05000483/LER-1995-003, :on 910520,TS 4.3.2.1-7.b Surveillance of Refueling Water Storage Tank Protection Loop Was Missed Due to Cognitive Personnel Error.Comprehensive Review of Other Surveillance Packages for Other Channels Was Made (← links)
- 05000483/LER-1995-002, :on 950505,TS Surveillance 4.8.4.1 of Containment Purge Exhaust Sampling Valve Circuit Feed Breaker Was Missed & Was Inoperable Due to Personnel Oversight.Reviewed Penetration Containment Circuits (← links)
- 05000483/LER-1995-001, :on 950501,manual Reactor Trip Initiated as Result of Shutdown Bank A,Group One Dropping Into Core During Replacement of Rod Control Sys Firing Cord.Procedure ITM-ZZ-00015 Revised to Provide Addl Guidance (← links)
- 05000483/LER-1991-004, :on 910823,SG low-low Level Trip Time Delay Design Oversight Resulted in Entry Into Tech Spec 3.0.3. Caused by Inadequately Communicated Decision to Modify Design of Containment Environ (← links)
- 05000483/LER-1991-003, :on 910628,discovered That ECCS Safety Injection Cold Leg Injection Throttle Valve Mispositioned Since 910518.Caused by Failure to Verify Valve Position & to Install New Locking Seal.Procedure Written (← links)
- 05000483/LER-1991-002, :on 910619,tech Spec Violation Occurred Re Blown Fuse for Ultimate Heat Sink Cooling Tower Fan Causing Inoperability of Both Trains of Safety Injection Pumps. Fuses Replaced (← links)
- 05000483/LER-1994-006, :on 930902,missed TS 4.3.2.2 Surveillance of Mechanical Turbine Trip Function & Subsequent TS 3.0.3 Entry Due to Personnel Error.Event Will Be Reviewed w/On-Site Review Committee (← links)
- 05000483/LER-1994-005, :on 940820,missed TS 4.3.3.6 Surveillance Thermocouple/Core Cooling Detection Sys Due to Inadequate Surveillance Procedures.Surveillance Procedure OSP-SH-00001 Revised (← links)
- 05000483/LER-1994-003, :on 940708,QA Engineer Surveillance of Radiation Monitors Indicated Utility Engineering Evaluation Conflicted W/Fsar Chapter 7.5.Caused by Utility Personnel Not Aware of Surveillance Procedures (← links)
- 05000483/LER-1994-004, :on 940816,found That Surveillance of Tech Spec on Total Curie Content in Gdt E Not Properly Performed Due to Cognitive Human Performance Error.Responsible Technicians Counseled on Failure to Follow Procedure (← links)
- 05000483/LER-1994-001, :on 940427,TS 3.5.1 Violation Occurred Due to High Pressure Alarm Condition on Two Safety Injection Accumulators Resulting in TS 3.0.3 Entry.Caused by Increase in Ambient & Containment Temp.Amend Submitted (← links)
- 05000483/LER-1990-017, :on 901230,reactor Trip Occurred Due to Failure of Controller/Driver Card for Feedwater Regulating Valve B & Valve Closed & Could Not Be Reopened.Caused by Failed Card Capacitor.Card Replaced (← links)
- 05000483/LER-1990-015, :on 901119,ESF Auxiliary Feedwater Actuation Occurred.No Cause for V55 Flashover Relay Actuation Could Be Determined (← links)
- 05000483/LER-1990-016, :on 901124,reactor Trip Occurred on Low Steam Generator Level Which Resulted from Turbine Trip on Spurious Moisture Separator Reheater High Level Signal.Caused by Vibration.Level Switch Inverted (← links)
- 05000483/LER-1990-013, :on 901018,health Physics Technician Received Exposure in Excess of 10CFR20.101(a) Limits of 7.5 Rems to Skin of Whole Body (← links)
- 05000483/LER-1990-014, :on 901106,RPS Actuation & ESF Feedwater Isolation Signal Initiated Due to I&C Technician Inadvertently Grounding SB038 Protection Set I Cabinet Secondary Power Supply (← links)
- 05000483/LER-1990-009, :on 900802,Tech Spec 3.0.3 Unintentionally Entered Due to Loss of Digital Rod Position Indication Sys on Failed Central Control Card.Caused by Power Supply Over Voltage Condition.Tech Spec Change Initiated (← links)
- 05000483/LER-1990-012, :on 901003,Tech Spec 3.9.2 Violation Occurred Due to Performance of Core Alteration When Source Range Nuclear Instrument Inoperable Due to Personnel Error. W/ (← links)
- 05000483/LER-1990-010, :on 900918,Tech Spec 3.3.3.1,Action 27 Was Not Met within 1 H (← links)
- 05000483/LER-1993-003-03, :on 931014,core Alterations Were Performed W/ Direct Flowpaths from Containment Atmosphere Due to Work on Containment Atmosphere Monitors.Caused by Lack of Mgt Work Control.Containment Integrity Restored (← links)
- 05000483/LER-1993-002, :on 931010,core Alteration Performed Without Operable Boron Injection Flowpath.Caused by Lack of Clear Plant Direction.Boron Injection Flow Path re-aligned & Appropriate Procedure revised.w/931109 Ltr (← links)
- 05000483/LER-1990-009-01, :on 900801,spurious Rod Deviation Alarms Occurred During Control Rod Movement Surveillance & on 900802,Tech Spec 3.0.3 Unintentionally Entered.Caused by Problem W/Power Supply (← links)
- 05000483/LER-1993-005, :on 931114,ESF Actuation on High S/G Occurred. Caused by S/G Level Allowed to Be Taken Too Close to High Level Setpoint.Procedure Will Be Revised & Licensed Operators Will Receive Addl Training (← links)
- 05000483/LER-1990-011, :on 901003,ESF Actuations Occurred Due to Spurious Signal on Fuel Bldg Radiation Monitor (← links)
- 05000483/LER-1993-004, :on 930507,determined Overtemp Delta Temp Constant Set Nonconservatively Re Ts.Caused by Technician Error When Calculating Time Constant.Procedure Revised to Ensure Adequate Setpoints (← links)
- 05000483/LER-1990-008, :on 900705,ESF Actuations Occurred Due to Maint Electrician Inadvertently Grounding Valve Limit Switch Contacts During Adjustment.Caused by Electrician Failure to Use Insulated Screwdriver.Personnel Counseled (← links)
- 05000483/LER-1990-006, :on 900603,determined That Tech Spec Action Statement Not Entered for Inoperable Remote Manual Containment Isolation Valves.Caused by Incorrect Tech Spec Interpretation.Interpretation Revised & Viewed (← links)
- 05000483/LER-1990-007, :on 900611,feedwater Isolation & Auxiliary Feedwater Actuation Occurred & on 900612,four Bank B Rod Control Cluster Assemblies Dropped.Caused by Failed Input Buffer Card & Faulty Slave Cycler,Respectively (← links)
- 05000483/LER-1990-005, :on 900501,reactor Trip,Auxiliary Feedwater Actuation & Feedwater Isolation Occurred Due to Turbine Trip on Loss of Main Generator Stator Cooling Water.Caused by Blown Fuse.Fuse Replaced & Logic Changed (← links)
- 05000483/LER-2019-005-01, Violation of Technical Specification 3.7.10 Due to Control Room Emergency Ventilation System Train B Inoperability (← links)
- 05000483/LER-1990-004, :on 900330,licensed Util Personnel Discovered Standing Oil on Generator.Oil Had Splashed Through Ventilation Screens Into Generator.Cause Unknown.Collector Rings & Stator Windings Cleaned (← links)
- 05000483/LER-1990-003, :on 900314,determined That Fire Protection Halon Sys for Either ESF Switchgear Rooms Could Have Disabled Both Trains of Class 1E Air Conditioner Units. Caused by Design Error.Trip Signal Removed (← links)
- 05000483/LER-1990-002, :on 900202,control Rod Urgent Failure Alarm Received During Monthly Surveillance on Movable Control Rod Assemblies.Caused by Defective Chip on Circuit Card.Card Replaced (← links)
- 05000483/LER-1990-001, :on 900108,discovered That 24-month Tech Spec Required Local Leak Rate Test Surveillance for Containment Electrical Penetration Had Not Been Performed Since 870917. Caused by Personnel Error.Test Performed (← links)
- 05000483/LER-1989-014, :on 891209,two ESF Actuations Occurred.Caused by Spurious Signal on Fuel Bldg Radiation Monitor.Loose Terminal Block Connection on Radiation Monitor Skid Motor Controller Tightened & Tested (← links)
- 05000483/LER-1989-013, :on 891109,ESF Containment Purge Isolation, Control Room Ventilation Isolation & Fuel Bldg Ventilation Isolation Actuation Occurred.Caused by Failed 15-volt Dc Power Supply.Thermography Performed (← links)
- 05000483/LER-1989-012, :on 891019,determined That Leakage Past Liquid Radwaste Discharge Monitor Tank a Inlet Isolation Valve Invalidated Tech Spec Required Batch Sample Prior to Discharge.Caused by Corrosion.Valve Replaced (← links)
- 05000483/LER-1989-010, :on 890905,ESF Containment Purge,Control Room Ventilation & Fuel Bldg Ventilation Isolation Actuations Received.Caused by Failure of 15-volt Dc Power Supply.Failed Power Supply Replaced & Event Discussed (← links)
- 05000483/LER-2019-001-01, Unplanned Loss of Switchyard Bus B Results in System Actuation (← links)
- 05000483/LER-2019-006, Unrecognized Inoperability of Boron Dilution Mitigation System (Bdms) Train B (← links)
- 05000483/LER-2019-005, Inoperability of CREVS B Train (← links)
- 05000483/LER-2019-004, Security Force Positions Evacuated Due to Severe Weather Announcement (← links)
- 05000483/LER-2019-003, Reactor Trip Due to Source Range Hi-Flux (← links)
- 05000483/LER-2019-002, Mode 4 Entry with Inoperable Auxiliary Building Pressure Boundary (← links)
- 05000483/LER-2019-001, Unplanned Loss of Switchyard Bus B Results in System Actuation (← links)
- 05000483/LER-2018-006, Inoperability of SSCs Due to Improper Environmental Qualification Classification (← links)
- 05000483/LER-2018-003, Cancellation of LER 2018-003-00 for Callaway Plant, Unit 1 (← links)
- 05000483/LER-2018-004, Violation on TS 3.8.1 AC Sources - Operating (← links)
- 05000483/LER-2018-002, Inadequate EOP Guidance for Asymmetric Natural Circulation Cooldown (← links)
- 05000483/LER-2018-001, Violation of Technical Specification 3.6.3 Containment Isolation Manual Found in Open Position (← links)
- 05000483/LER-1917-003, Regarding Violation of Technical Specification 3.6.3, Containment Isolation Check Valve Found in Open Position (← links)
- 05000483/LER-1917-002, Regarding Inadequate Protection from Tornado Missiles Identified Due to Nonconforming Design (← links)
- 05000483/LER-1917-001, Regarding Violation of Technical Specification 3.7.9 Due to Ultimate Heat Sink (UHS) Cooling Tower Train Inoperability (← links)
- 05000483/LER-2015-002, Regarding Manual Auxiliary Feedwater System Actuation (← links)
- 05000483/LER-2016-001, Regarding Control Room Air Conditioning Inoperability Due to Essential Service Water Pressure Transient (← links)
- 05000483/LER-2015-004, Regarding Auxiliary Feedwater Control Valve Inoperable Due to Faulty Electronic Positioner Card (← links)
- 05000483/LER-2015-003, Regarding Reactor Trip Caused by Transmission Line Fault (← links)
- 05000483/LER-2015-001, Regarding Completion of a Shutdown Required by the Technical Specifications - TS 3.4.13 (← links)
- 05000483/LER-2014-003-02, Regarding Inverter NN11 Inadvertently Transferred to Its Alternate AC Source (← links)
- 05000483/LER-2014-005-01, 1 for Callaway Unit 1 Regarding All ECCS Accumulator Isolation Valve Operator Breakers Closed in Mode 3 with RCS Pressure Greater than 1000 PSIG (← links)
- 05000483/LER-2014-003-01, Regarding Inverter NN11 Inadvertantly Transferred to Its Alternate AC Source (← links)
- 05000483/LER-2014-006, Regarding Main Generator Excitation Transformer Faulted to Ground, Causing Turbine and Reactor Trip (← links)
- 05000483/LER-2014-005, Regarding All ECCS Accumulator Isolation Valve Operator Breakers Closed in Mode 3 with RCS Pressure Greater than 1000 PSIG (← links)
- 05000483/LER-2014-003, Inverter NN11 Inadvertantly Transferred to Its Alternate AC Source (← links)
- 05000483/LER-2014-002, Regarding Operation Outside of Pressure and Temperature Limit Report Curve Required by Technical Specification 3.4.3 (← links)
- 05000483/LER-2014-001, Regarding Security Measure Suspended Per Callaway Plant Security Plan. Letter Through Page 1 of 4 of 366A Form (← links)
- 05000483/LER-2013-009, Regarding Appendix R Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection (← links)
- 05000483/LER-2013-008, For Callaway, Unit 1, Regarding Arcing in Isophase Bus Results in a Generator Trip, Turbine Trip, Reactor Trip and Small Fire (← links)
- 05000483/LER-2013-007, Violation of TS 3.8.1 Due to an Inoperable Offsite AC Electrical Power Source (← links)
- 05000483/LER-2013-006, Regarding Degradation of Safety Injection Accumulator Vent Line (← links)
- 05000483/LER-2013-004, Regarding Control Building Envelope (Cbe) Boundary Door Open During Movement of Irradiated Fuel Assemblies (← links)
- 05000483/LER-2013-005, Regarding Lnoperability of ESW Cross Connect Valve (← links)
- 05000483/LER-2013-003, Regarding Inoperability of CREVS B Train (← links)
- 05000483/LER-2013-002, Regarding Degraded Bearing on B Essential Service Water Pump Motor (← links)
- 05000483/LER-2013-001, Re Violation of Technical Specification 3.0.3 Due to Class 1E Electrical Equipment AC Unit Inoperability (← links)
- 05000483/LER-2012-002, Failure of 120-V Vital Instrument System Power Inverter NN14 (← links)
- 05000483/LER-2012-001, Regarding a Modification Implementation Error Adversely Impacting the Containment Cooling System (← links)
- 05000483/LER-2011-006, Regarding Postulated Fire Could Damage High Density Polyethylene (Hdpe) Essential Service Water Piping (← links)
- 05000483/LER-2011-005, Regarding Manual Isolation Valve Unable to Meet Closure Requirements (← links)
- 05000483/LER-2010-009-02, For Callaway Plant, Unit 1 Regarding High Energy Line Break (HELB) Program Deficiencies (← links)
- 05000483/LER-2011-004, Regarding Post-Fire Safe Shutdown Latent Design Issue with Essential Service Water (ESW) Flow Balance (← links)
- 05000483/LER-2010-009-01, Regarding High Energy Line Break (HELB) Program Deficiencies (← links)
- 05000483/LER-2011-002, Transmittal of LER 11-002-00 for Callaway, Unit 1, Regarding Unauthorized Firearm Inside the Protected Area (← links)
- 05000483/LER-2010-010, Violation of Technical Specification 3.0.3 Due to B Class 1E Electrical Equipment A/C Unit Inoperability (← links)
- 05000483/LER-2010-008-01, Re Inadequate Analysis Results in Component Cooling Water Train Declared Inoperable (← links)
- 05000483/LER-2010-009, Regarding High Energy Line Break (HELB) Program Deficiencies (← links)
- 05000483/LER-2010-005-01, Regarding Emergency Diesel Generator a Shutdown During 24 Hour Surveillance (← links)
- 05000483/LER-2010-008, Regarding Inadequate Analysis Results in a Component Cooling Water Train Declared Inoperable (← links)
- 05000483/LER-2010-007, Regarding Violation of Technical Specification 3.6.3, Containment Isolation Valves (← links)
- 05000483/LER-2010-006, Regarding Absence of Vent Valve in RHR Heat Exchanger B Discharge Line Resulted in Incomplete TS Surveillance (← links)
- 05000483/LER-2010-004, Regarding Unanalyzed Single Failure Component for Ultimate Heat Sink/Essential Service Water (← links)
- 05000483/LER-2010-002, Regarding Anticipatory Motor-Driven Auxiliary Feedwater Actuation Function Rendered Inoperable in Mode 1 (← links)
- 05000483/LER-2010-003, Regarding Safety System Actuation After Loss of a Switchyard Bus (← links)
- 05000483/LER-2010-001, Regarding Emergency Core Cooling System Mode 4 Operating Practices Prohibited by Current Technical Specification 3.5.3 (← links)
- 05000483/LER-2009-005, Regarding Atmospheric Steam Dump Valves Inoperable for Time Greater than Allowed by Technical Specifications (← links)
- 05000483/LER-2009-004, Failure to Comply with Technical Specification 3.8.1 Required Action A.1 for One Offsite Circuit Inoperable (← links)
- 05000483/LER-2009-003, Turbine-Driven Auxiliary Feedwater Pump Inoperable During Mode Change from 4 to 3 (← links)
- 05000483/LER-2009-002, TDAFP Failed to Start During Surveillance Test (← links)
- 05000483/LER-2009-001, Regarding Technical Specification Required Shutdown Due to Loss of Power Supply (← links)
- 05000483/LER-2008-006, Regarding Reactor Trip Due to Turbine Trip During Power Reduction Following Loss of C Condensate Pump (← links)
- 05000483/LER-2008-007, Intermediate Range Hi Flux Reactor Protection System Actuation While Shutdown (← links)
- 05000483/LER-2008-008, Regarding Reactor Manually Tripped Due to B Condensate Pump Tripping Due to a Motor Ground Fault (← links)
- 05000483/LER-2008-005, Regarding Reactor Manually Tripped Due to B Main Feed Pump Tripping on Low Lube Oil Pressure (← links)
- 05000483/LER-2008-002, Regarding Void Found in Line EM-023-HCB - Residual Heat Removal Pump a to Safety Injection Pumps (← links)
- 05000483/LER-2008-003, Inadvertent P-14 Fwis Actuation Followed by Reactor Trip Actuation Due to Steam Generator Low-Low Water (Nr) (← links)
- 05000483/LER-2008-004, Failure to Maintain Containment Purge & Exhaust System in Service During Core Alts W/Equipment Hatch Open (← links)
- 05000483/LER-2008-001, Containment Cooler Inoperability (← links)
- 05000483/LER-2007-003, Regarding 1 OTDT Channel Inoperable for Greater than TS Allowable Time (← links)
- 05000483/LER-2007-002, Regarding Manual Reactor Trip at Reduced Power Due to Inadequate Feedwater Control (← links)
- 05000483/LER-2007-001, Re Single Train Inoperability in the Essential Service Water System Due to Inadequate Valve Closure Setup (← links)
- 05000483/LER-2006-009, Regarding Inadequate Application of Technical Specifications Related to Main Steam Isolation Valves and Actuator Trains (← links)
- 05000483/LER-2006-008, Regarding Coms Inoperability, RHR Suction Relief Valve Failure (← links)
- 05000483/LER-2006-007, Re Inoperability of a Containment Cooler Longer than Allowed by Technical Specifications (← links)
- 05000483/LER-2006-006, Regarding Unexpected Inoperability of B Emergency Exhaust System Due to a Failed Handswitch on the Operations Main Control Board (← links)
- 05000483/LER-2006-005, Regarding Loss of a Train Off-site Vital Power During Relay Testing in Switchyard (← links)
- 05000483/LER-2006-004, Re Turbine Trip at 47% Power with Rods in Auto Leads to Manual Reactor Trip and Aux. Feedwater Actuation (← links)
- 05000483/LER-2006-003, Re Unexpected Inoperability of the Emergency Exhaust System Due to Inoperable Pressure Boundary (← links)
- 05000483/LER-2006-002, Re Unexpected Inoperability of a Control Room A/C Due to a Failed Discharge Reed Valve in Its Associated Compressor (← links)
- 05000483/LER-2006-001, Re Pressurizer PORV Stroke Time and Other Delays Exceed Times Assumed in COMS Analyses (← links)
- 05000483/LER-2005-002, Re Plant Shutdown Required by Technical Specification 3.7.8 for an Inoperable Train of Essential Service Water (← links)
- 05000483/LER-2005-003, Re Lo-Lo Steam Generator Level Results in Actuation of Reactor Protection System and Auxiliary Feedwater System (← links)
- 05000483/LER-2005-001, Regarding Reactor Trip While Replacing RP043 Control Cabinet Power Supply (← links)
- 05000483/LER-2004-006, A Steam Generator Tube Inspection Results Classified as C-3 (← links)
- 05000483/LER-2004-005, Inadequate Feedwater Heating During Plant Startup Causes Turbine Trip and Subsequent Reactor Trip (← links)
- 05000483/LER-2004-004, Safety Injection While Conducting Plant Heatup to Normal Operating Pressure and Temperature (← links)
- 05000483/LER-2004-003, Reactor Trip Due to Faulty Relay (← links)
- 05000483/LER-2004-002, Regarding Reactor Trip Due to Faulty Electrical Relay (← links)
- 05000483/LER-2004-001, Regarding Manual Initiation of Essential Service Water System Due to Loss of Normal Service Water System (← links)
- 05000483/LER-2003-009, Regarding Failure of Electrical Inverter Resulted in Technical Specification Required Plant Shutdown (← links)
- 05000483/LER-2003-008, Regarding Technical Specification Violation Due to Valve Control Circuit Modification (← links)
- 05000483/LER-2003-007, Engineering Evaluations Incorrectly Approved Leaving Health Physics Access Doors Open (← links)
- 05000483/LER-2003-006, Incorrect Sequencing of Steam Generator Tube Rupture Procedure Steps Could Have Resulted in Delaying Recovery from a Tube Rupture (← links)
- 05000483/LER-2003-005, Failure of Both Containment Spray Pumps Due to Air Binding (← links)
- 05000483/LER-2003-004, For Callaway Plant Unit 1 Regarding Boron Dilution Mitigation System Blocked in Mode 3 Which Not Consistent with FSAR Accident Analysis (← links)
- 05000483/LER-2003-003, Incorrect Steam Generator Tube Rupture Analysis Contained in FSAR (← links)
- 05000483/LER-2003-002, Re EGHV0061 Inoperable for a Time Period Greater than Allowed by Technical Specifications (← links)
- 05000483/LER-2003-001, Re Improper Administrative Controls Result in Technical Specification Violation (← links)
- 05000483/LER-2002-013, RPS Actuation in Mode 4 While Performing Tadot Testing (← links)
- 05000483/LER-2002-011, For Callaway Plant Unit 1 Regarding a Steam Generator Tube Inspection Results Classified as C-3 (← links)
- 05000483/LER-2002-010, Re Potential for Fire Induced Common Cause Failure (← links)
- 05000483/LER-2002-006, Re Hot Short Issue Reveals Potential for Draining RWST to Containment Sumps on June 7, 2002 (← links)
- 05000483/LER-2002-009, Flooding of Security Facilities on 05/12/2002 (← links)
- 05000483/LER-2002-008, Non-Conservative Technical Specification Allowable Value for Main Steam Line Pressure Negative Rate (← links)
- 05000483/LER-2002-007, Re Violation of Site Security Plan on 04/27/2002 (← links)
- 05000483/LER-2002-004, Re Reactor Protection System Actuation While Performing Main Turbine Shell Warming in Mode 4 (← links)
- 05000483/LER-2002-005, Re Inaccurate Steam Generator Low-Low Level Setpoints Due to Westinghouse Design Calculation Error (← links)
- 05000483/LER-2002-002, Re a Motor Driven Auxiliary Feedwater Pump Inoperable Due to Auxiliary Feedwater Calculation Error (← links)
- 05000483/LER-2002-001, Re Manual Auxiliary Feedwater Actuation and Subsequent Gas Binding of the a Motor Driven Auxiliary Feedwater Pump (← links)
- 05000483/LER-2025-002, Reactor Vessel Bottom Head (Rvbh) Bottom Mounted Instrument (Bmi) Nozzle Pressure Boundary Leakage (← links)
- 05000483/LER-2025-001, Refueling Water Storage Tank Lowered Below TS 3.5.4 Limit (← links)
- 05000483/LER-1995-002, :on 950505,TS Surveillance 4.8.4.1 of Containment Purge Exhaust Sampling Valve Circuit Feed Breaker Was Missed & Was Inoperable Due to Personnel Oversight.Reviewed Penetration Containment Circuits (← links)