Pages that link to "05000275/LER-2011-001, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable"
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The following pages link to 05000275/LER-2011-001, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable:
Displayed 18 items.
- 05000275/LER-2011-001 (redirect page) (← links)
- 05000275/LER-2015-001, Both Trains of Residual Heat Removal Inoperable Due to Circumferential Crack on a Socket Weld (← links)
- 05000275/LER-2002-006 (← links)
- 05000275/LER-2001-003 (← links)
- 05000275/LER-2001-002 (← links)
- 05000275/LER-2001-001 (← links)
- IR 05000275/2012003 (← links)
- 05000275/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000275/LER-1982-005, Forwards LER 82-005/03X-1 (← links)
- 05000275/LER-1982-009, Forwards LER 82-009/01T-0 (← links)
- 05000275/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000275/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000275/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000275/LER-1982-012, Forwards LER 82-012/01T-0 (← links)
- 05000275/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000275/LER-1982-010, Forwards LER 82-010/01T-0 (← links)
- 05000275/LER-1983-014, Updated LER 83-014/01T-1:on 830526,torque Switch Binding Observed During Maint on Limitorque Operator.Caused by Excessive Size of Mounting Screw Heads.Screws Replaced (← links)
- 05000275/LER-1983-007, Updated LER 83-007/01T-1:on 830509,during Welding of Reinforcement Pad on Branch Connection to Loop C Component Cooling Water Sys,Water Leaked from Weld Area.Caused by Grinding on Fillet Overweld.Overweld Removed (← links)
- 05000275/LER-1983-006, Updated LER 83-006/01T-1:on 830510,possible Undersize Condition Discovered on Reactor Coolant Piping Weld WIB-RC-2-17 During Ultrasonic Testing.Weld Confirmed to Be Above Min Wall Requirements Mechanically (← links)
- 05000275/LER-1986-012, Forwards LER 86-012-00 Re Inoperability of Both RHR Trains & Failure to Rept Event within Time Required.Event Did Not Affect Public Health & Safety (← links)
- 05000275/LER-2023-001, Unit 1 Manual Reactor Trip at Low Power (← links)
- 05000275/LER-1986-009-01, :on 860820,during Surveillance Test Procedure M-16N,inadvertent Actuation of Auxiliary Feedwater Pump 1-3 Occurred.Caused by Personnel Error.Individual Counseled. Procedure Will Be Revised (← links)
- 05000275/LER-1986-016-01, :on 861027,fiberscope Insp Revealed That Retainer Nut That Attaches Check Valve Disc to Tail Link Loose or Missing on Two of Four Check Valves.Caused by Poor Mfg Design.Design Change Implemented (← links)
- 05000275/LER-1986-010, :on 860829,reactor Trip & Subsequent Turbine Trip Occurred Due to Reactor Trip Breaker Inadvertently Opening During Testing.Caused by Loose Termination on Coil of Undervoltage Shunt Trip Relay (← links)
- 05000275/LER-1986-020-01, :on 861228,reactor Trip Occurred Due to Steam Flow/Feedwater Flow Mismatch Signal Coincident W/Low Steam Generator Level Signal.Caused by Steam Line Pressure Transient Due to Opening of Steam Dump Valves (← links)
- 05000275/LER-1986-021-01, :on 870205,audit Identified Improper Sequencing of Surveillances on Several Reactor Trip Sys Intrumentation Channels Due to Misapplication of Testing on Staggered Basis.Caused by Personnel Error (← links)
- 05000275/LER-1985-042, :on 851113,time Limit of Tech Spec 4.3.3.9.1 Exceeded.On 851024,Surveillance Test Procedure I-77A Performed on Unit 2 Flow Rate Measurement Device Instead of Unit 1 Device.Caused by Personnel Error (← links)
- 05000275/LER-1987-003, :on 870126,automatic Initiation of Containment Ventilation Isolation Sys (Cvis) Occurred.Cvis Initiation Attributed to Spurious Noise Signals.Investigation Continuing (← links)
- 05000275/LER-1986-018-01, :on 860830,pressurizer Code Safety Valves Found Out of Tech Spec Limit During Surveillance Test Procedure M-77.Caused by Failure to Drain Loop Seal Upstream of Valves Prior to Test (← links)
- 05000275/LER-1986-015-01, :on 861001 & 08,automatic Isolations of Containment Ventilation Sys (Cvs) Occurred.Caused by Noise Susceptibility Problems Re Cvs Isolation Circuitry.Noise Reduction Task Force Study Continuing (← links)
- 05000275/LER-1986-014-01, :on 860916,control Room Ventilation Sys (CRVS) Automatically Shifted from Normal to Pressurization Mode. Caused by Alarm Signal from CRVS Radiation Monitor RE-25. Investigation Continuing (← links)
- 05000275/LER-1986-012-01, :on 860908,while Installing Mod in Solid State Protection Sys Cabinet,Both RHR Trains Became Inoperable & Event Not Reported within Time Required.Caused by Personnel Error.Personnel to Be Retrained & Event Reviewed (← links)
- 05000275/LER-1986-010-01, :on 860829,reactor & Turbine Trip Occurred Due to Reactor Trip Breaker Inadvertently Opening During Testing.Caused by Loose Termination on Coil of Undervoltage Shunt Trip Auxiliary Relay (← links)
- 05000275/LER-1986-011, :on 860830,containment Side Door to Personnel Airlock Opened While Outer Atmosphere Door Open,Rendering Airlock Inoperable.Caused by Excessive Wear Due to Heavy Usage.Interlocking Device Repaired (← links)
- 05000275/LER-1987-001, :on 870105,unit Trip,Turbine Trip & Reactor Trip Occurred While Unit Being Ramped Down in Power Due to Low Electrohydraulic (Eh) Control Fluid Level.Caused by Leakage on Valve Fitting.Eh Reservoir Filled (← links)
- 05000275/LER-1985-014-02, Forwards LER 85-014-02 Re Reactor Trip & Safety Injection. Rev Repts Discovery of Addl Damaged Snubber Resulting from Water Hammer After Reactor Trip (← links)
- 05000275/LER-1986-019-01, :on 861212,operators Failed to Comply W/Tech Specs by Opening Containment Ventilation Isolation Valves FCV-662 & 664 While Radiation Monitor RM-14B Inoperable. Caused by Procedural Deficiency (← links)
- 05000275/LER-1984-039, :on 840229,Mode 4 Entered W/O Meeting Surveillance Requirements of Tech Spec 3.8.3.1.On 831028, Insufficient Load Applied to 125-volt Battery 1-3.Caused by Lack of Instructions.Procedure Revised (← links)
- 05000275/LER-1986-008-01, :on 860415,flow Control Valve Surveillance Test Interval Exceeded.Caused by Personnel Error.Alert Status Board Used to Increase Emphasis on Updating & Validation of Surveillances (← links)
- 05000275/LER-1986-013, :on 860913,three Snubbers on Steam Generator 1-2 Discovered W/Load Pins Out of Position.Most Likely Caused by Mispositioning of Pin.Upgraded Locking Device & Set Screws Installed (← links)
- 05000275/LER-1987-002, :on 870222,reactor Tripped Due to High Steam Generator Water Level.Caused by Calibr Drift of Electrical Current to Pressure Converter,Preventing Steam Generator Valve from Opening.Converter Recalibr (← links)
- 05000275/LER-1986-007-01, :on 860710,15 & 30,automatic Isolation of Containment Ventilation Sys Occurred.Caused by Spurious Noise Signals on Instrument Ac Power Supply Lines.Noise Reduction Task Force Investigating Problem (← links)
- 05000275/LER-1986-013-01, :on 860913,three Snubbers on Steam Generator 1-2 Discovered W/Load Pins Out of Position.Cause Under Investigation.Analysis of Mispositioned Load Pins Also Underway (← links)
- 05000275/LER-1986-006-01, :on 860528,while in Mode 1 & Performing Preventive Maint,Reactor Trip Breaker 52 Rta (AA) Failed to Trip as Required.Cause Unknown.Program to Exercise Circuit Implemented (← links)
- 05000275/LER-1986-005, :on 860422,opening Created in Fire Barrier W/O Establishing Continuous Fire Watch.Caused by Misinterpretation of Const Requirements by Plant Fire Protection Personnel.Procedure Revised (← links)
- 05000275/LER-1986-002, :on 860204,during Routine Shift Check Review, Discovered That on 860201,time Limit for Performing Surveillance Test Procedure R-2B, Operator Heat Balance, Exceeded.Caused by Personnel Error.Test Completed on 860201 (← links)
- 05000275/LER-1985-040, :on 860411,during Surveillance Test Review, Discovered That on 850521,interval for Performing Test Start of Diesel Generator 1-1 Exceeded.Caused by Operator Misinterpretation.Test Completed on 850603 (← links)
- 05000275/LER-1984-038, :on 860415,during Surveillance Test Review, Discovered That on 841015,interval for Performing Valve Stroke Timing Test of 10% Atmospheric Dump Valves Exceeded. Caused by Procedural Deficiency.Test Completed on 850106 (← links)
- 05000275/LER-1984-037, :on 860506,engineers Discovered That 840305 Surveillance Interval for Containment Fan Cooler Unit Exceeded.Caused by Personnel Error.Personnel Counseled (← links)
- 05000275/LER-1988-026, :on 880901,turbine Trip & Reactor Trip Occurred During Restart.Turbine Trip Initiated by anti-motoring Relay PS-30.Caused by Root Isolation Valve in Closed Position.Low Side Root Valve for PS-30 Opened (← links)
- 05000275/LER-1985-039, :on 851010,allowable Time Limit for Performance of Surveillance Required by Tech Spec Exceeded for Redundant Heater 1-EH-27A Located on Control Room Ventilation Sys Train.Caused by Personnel Error (← links)
- 05000275/LER-1986-001, :on 841025,860103 & 0208,review of Surveillance Test Records Identified Missing Surveillances on RCS Temp & Containment Pressure Instrumentation Channels.Caused by Personnel Error (← links)
- 05000275/LER-1986-002-01, :on 860201,operators Failed to Perform Surveillance Test Procedure R-2B, Operator Heat Balance, within Specified Time Limits.Caused by Personnel Error. Procedures Revised (← links)
- 05000275/LER-1985-035, :on 851110,steam Feedwater Flow Mismatch Channels for Steam Generator 1-2 Found Inoperable.Caused by Personnel Error.Personnel Counseled & Procedure Revised (← links)
- 05000275/LER-1984-036, :on 840303,discovered That Initial Entry to Mode 3 Made W/O Boron Injection Tank Recirculation Check Valve 8912 Meeting Stroke Testing Requirements.Caused by Personnel Error.Testing Performed (← links)
- 05000275/LER-1984-016, :on 840521,const Electrician Inadvertently Opened Power Supply Breaker for Several Plant Radiation Monitors,Initiating Actuation of Containment Ventilation Isolation.Breaker Closed (← links)
- 05000275/LER-1986-003-01, :on 860107 Allowed Outage Time of Tech Spec 3.3.3.6,Action A,Exceeded.Casued by Personnel Error.On 851231 Valve Position Failed Low.Tech Specs Reviewed (← links)
- 05000275/LER-1986-004-01, :on 860314,high Steam Flow & Low Steamline Pressure Safety Injection & Subsequent Reactor Trip Occurred.Caused by Failed Control Module in Steam Dump Control Sys.Control Module Replaced (← links)
- 05000275/LER-1985-038, :on 860116,during Surveillance Test Procedure P-6B,auxiliary Feedwater Pump 1-1 Woodward Governor Speed Adjustment Knob Found Mispositioned.Cause Unknown,But 72 H Limit May Have Been Exceeded on 851218 (← links)
- 05000275/LER-1985-036, :on 851119,discovered That Safety Injection & Charging Pump Suction Crosstie Valve Surveillances Not Performed Since 850814.Caused by Personnel Error.Test Performed (← links)
- 05000275/LER-1985-029, :on 850821,containment Sump Level wide-range Channel Check Not Performed.Caused by Failure to Incorporate Requirement Into Surveillance Test Procedure (STP) I-1D. Requirement Incorporated.Test Performed (← links)
- 05000275/LER-1985-018-01, :on 850505,test Leads Mistakenly Left Connected to Reactor Coolant Outlet Temp Monitor Circuit & Did Not Meet Electrical Separation Criteria.Caused by Technician Oversight.Personnel Received Addl Training (← links)
- 05000275/LER-1985-032, :on 850912,QA Insp Disclosed Absence of Nuts on Embedded Plate for Main Feedwater Piping Snubber Support. Caused by Const & Engineering Misunderstandings of Design Details.Nuts Installed & Plate Stiffened (← links)
- 05000275/LER-1985-033, :on 851025,automatic Reactor & Turbine Trips Occurred Due to Reactor Coolant Pump Breaker Position Relay Opening Momentarily.Caused by Shorted Capacitator in Comparator Module (← links)
- 05000275/LER-1985-037, :on 851030 & 1101,missed Surveillances of Containment Spray Pumps Occurred.Caused by Engineer Failing to Increase Surveillance Test Frequency When Pumps Reached Alert Range (← links)
- 05000275/LER-1985-034, :on 851017,discovered That Surveillance of Plant Vent Noble Gas Activity Monitors Not Conducted.On 850629 Containment Purge Initiated W/Inoperable Radiation Monitor.Caused by Computer Data Entry Error (← links)
- 05000275/LER-1985-031, :on 850815,incorrect Value Used to Align Nuclear Instrumentation Sys Power Range Positive & Negative Rate Trip Bistables & Range Rate Trip Setpoints Set Incorrectly.Caused by Personnel Error (← links)
- 05000275/LER-1985-028, :on 850814,two Second Level Undervoltage Relays on 4-kV Bus F Found Set Below Tech Spec Limits.Caused by Personnel Error.Procedure MP E-50.33 Revised to Clarify Desired as-left Setpoint (← links)
- 05000275/LER-1985-027, :on 850805,automatic Isolation of Containment Ventilation Sys Occurred W/Unit in Mode 1.Caused by Incomplete Shopwork Follower & Personnel Error.Personnel Trained & Signs Installed on RM-11 & RM-12 (← links)
- 05000275/LER-1985-026, :on 850710 & 21,nonlicensed Operators Performing Surveillance Test Procedure M-9A-3 Failed to Perform Surveillance Check.Caused by Operator Failing to Understand Requirement.Procedure Revised (← links)
- 05000275/LER-1985-024, :on 850712,temporary Change to safety-related Procedures Not Reviewed by Plant Staff Review Committee & Approved within 14 Day Tech Spec Time Limit.Caused by Change in Processing Procedure (← links)
- 05000275/LER-1985-025, :on 850731,automatic Isolation of Containment Ventilation Sys Occurred.Caused by Spurious Spike in Gaseous Radiation Monitor.Signal Cable Connectors Replaced (← links)
- 05000275/LER-1985-002-01, :on 850719,while Restoring Train a to Svc, Inadvertent Actuation of Train B Safety Injection Occurred. Caused by Operator Inadvertently Moving Reset Block Switch Instead of Block Position (← links)
- 05000275/LER-1985-022, :on 850501,four Accumulators Became Inoperable W/Unit in Mode 3.Caused by Conflict in Procedures & Misunderstanding Re Requirements for Use of Seals.Procedures Revised & Breaker Panels Labeled (← links)
- 05000275/LER-1985-023, :on 850702,automatic Isolation of Containment Ventilation Sys Occurred.Caused by Spurious Spike in Gaseous Radiation Monitor RE11.Monitor Alarm Set & Air Monitor Isolation Valves Reopened (← links)
- 05000275/LER-1985-030, :on 850827,lo-lo Steam Generator Level Reactor Trip Occurred.Caused by Loose Termination on Main Feedwater Pump Local Manual Trip Button.Loose Termination Tightened. Local Manual Trip Connections Inspected (← links)
- 05000275/LER-1985-021, :on 850618,while in Mode 1,axial Flux Difference Could Not Be Reduced to within Target Band,Nor Could Reactor Power Be Reduced to Less than 90% within 15 Min.Caused by Rapid Xenon Burnout (← links)
- 05000275/LER-1985-018, :on 850505,test Leads Left Connected to Reactor Coolant Outlet Temp Monitors After Completion of Surveillance Test Procedure.Caused by Lack of Communication Between Shift Personnel.Leads Removed 850510 (← links)
- 05000275/LER-1985-014, :on 850518,reactor Tripped Followed by Safety Injection.Caused by Failure of Slave 2.S Kva Regulating Transformer.Transformer Replaced & Inverter Returned to Svc (← links)
- 05000275/LER-1985-019, :on 850602,limiting Condition for Operation Time Requirement Exceeded Re Thermocouple Monitoring Sys Channel Check.Caused by Personnel Failure to Review Computer Generated Preventive Maint Tracking Sys (← links)
- 05000275/LER-1985-013, :on 850430,Mode 4 Entered W/Timer Settings Outside Acceptable Tech Spec Limits.Caused by Personnel Error.Personnel Received Addl Training & Procedure Revised (← links)
- 05000275/LER-1985-020, :on 850613,start Signal Applied to Diesel Generator 1-2,not 1-3.Caused by Personnel Misunderstanding of Verbal Instructions.Generator 1-2 Secured.Improvements in Communications & Identification Implemented (← links)
- 05000275/LER-1985-017, :on 850523,maint Employee Permitted to Enter High Radiation Area W/O Positive Exposure Control W/Unit in Mode 1.Caused by Personnel Error.Technician Counseled & Will Be Disciplined (← links)
- 05000275/LER-1985-015, :on 850520,reactor Trip Followed by Safety Injection Occurred.Caused by Loose Connection to Output Circuit Breaker for Instrument Inverter IY-1-2.Connections Reterminated & Inverter Returned to Svc (← links)
- 05000275/LER-1985-016, :on 850520,automatic Reactor Trip Occurred. Caused by Deenergization of Bistables for Source Range Channel 32 (Jc)(Ri) Due to Voltage Transient.Event Reviewed W/Applicable Personnel & Procedure Revised (← links)
- 05000275/LER-1985-013-01, :on 850430,Mode 4 Entered W/Two ESF Timers Out of Tech Spec Limits.Caused by Personnel Failure to Verify Timer Settings.Personnel Given Addl Training on Importance of Verifying Data (← links)
- 05000275/LER-1985-011, :on 850217,manual Reactor Trip Initiated in Response to Automatic Shutdown of Main Feedwater Pumps 1-1 & 1-2 from Excessive Thrust Bearing Wear Indication.Thrust Bearing Wear Detection Sys Reset (← links)
- 05000275/LER-1985-012, :on 850321,automatic Reactor & Turbine Trips Occurred.Caused by Technicians Inadvertently Shorting 115-volt Vital Power Supply While Testing Level Channels. Personnel Reinstructed (← links)
- 05000275/LER-1984-035, :on 841215,turbine Trip & Feedwater Isolation Occurred.Caused by hi-hi Steam Generator Water Level Signal. Steam Generator 1-2 Feedwater Restored & Turbine Relatched (← links)
- 05000275/LER-1984-034, :on 841215,diesel Generator Started Automatically.Caused by Personnel Error.Memo Issued Instructing All Operators to Verify New Source Before Opening Original Source Breaker (← links)
- 05000275/LER-1984-033, :on 841206,reactor Tripped When Source Range High Flux Trip Setpoint Exceeded Before Intermediate Range Permissive (P-6) Allowed Blockage.Cause Not Stated. Equipment Responded as Designed (← links)
- 05000275/LER-1984-032, :on 841205,inadvertent Reactor Trip Occurred While Shutting Down Turbine for Maint.Caused by Personnel Error.Turbine Power Permissive P-13 Will Be Reset Using Actual Plant Data (← links)
- 05000275/LER-1985-008, :on 850205,time Limit for Performing Isotopic I Analysis Exceeded.Caused by Communication Failure. Operating Procedure Revised to Prevent Recurrence & Operators Retrained (← links)
- 05000275/LER-1985-005, :on 850120,both RHR Trains Became Inoperable. Caused by Technician Checking Wrong Breaker & Verifying Breaker as Open.Rhr Pump 1-1 Restarted & RHR Flow Established (← links)
- 05000275/LER-1984-026, :on 840824,moveable in-core Detector Sys Detectors Found Out of Safe Storage Location.Caused by Weakness in Administration & Hardware Controls.Detectors Returned to Concrete Shielding location.w/841012 Ltr (← links)
- 05000275/LER-1985-004, :on 850104,30-day Special Rept Submittal Period Exceeded.On 841128,public Address Sys Cable Installation Led to Inoperability of Two Fire Barriers.On 850108,unsealed Penetrations Discovered (← links)
- 05000275/LER-1985-003, :on 850105,while in Mode 1,diesel Generator (Ek) 1-1 Started Automatically Due to Undervoltage on 4 Kv Bus H.Event Classified as Anticipated Operational Transient (← links)
- 05000275/LER-1985-006, :on 850125,both RHR Trains Inoperable.Caused by Closure of Loop 4 RHR Suction Valve MOV-8702 Due to Loss of 4-kV Bus Voltage.Suction Valve Opened & RHR Flow Established within 2 Minutes (← links)
- 05000275/LER-1985-001, :on 850102,while in Mode 1,low Flow in RCS Initiated Reactor Trip.Caused by Turbine Overspeed Protection Controller Sys Solenoid Valve Failure.Valve Replaced (← links)
- 05000275/LER-1985-002, :on 850104,w/unit in Mode 1,reactor Tripped on Turbine Auto Stop Oil Pressure.Caused by Voltage Transient Due to Second Condensate Booster Pump Startup.All Automatic Equipment Responded as Designed (← links)
- 05000275/LER-1992-001, :on 920214,0608,19 & 25,plant Operated Outside of Design Basis Re App R Criteria.Caused by Personnel Error Due to Lack of Attention to Detail.Fire Watches Established, Operators Notified & Design Change Initiated (← links)
- 05000275/LER-1984-031, :on 841128,during Mode 1,turbine Tripped Due to hi-hi Steam Generator Level on Steam Generator 1-1.Caused by Personnel Error & Possible Instrument Failure.Controller Replaced (← links)
- 05000275/LER-1984-030, :on 841124,inadvertent Turbine & Reactor Trip Led to Safety Injection.Caused by Operator Failing to Reset Steam Dump Valve Pressure Controller for Normal Operation. Procedures & Shift Turnover Checklist Revised (← links)
- 05000275/LER-1984-028, :on 841029,diesel Generator 1-2 Started Automatically in Response to Loss of Power to 4-kV Bus G. Caused by Failure of Breaker 52-HG-14 to Close During Performance of Surveillance Test (← links)
- 05000275/LER-1984-029, :on 840411,containment Ventilation Isolation Actuated Due to Open Instrument Inverter Output Breaker. Cause Unknown.No Permanent Corrective Actions Taken.Related Correspondence (← links)
- 05000275/LER-1985-009, :on 850213,steam Line Differential Pressure Injection Signal Received,Resulting in Safety Injection, Turbine Trip & Reactor Trip.Caused by Frequency Interference from Radio.Procedure Revised (← links)
- 05000275/LER-1984-027, :on 841026,while in Mode 5,concentration of Oxygen in Gaseous Radwaste Sys Exceeded 4% by Vol for 1 H & 55 Minutes.Caused by Personnel Error.Low Pressure Nitrogen Sys Repressurized W/Nitrogen (← links)
- 05000275/LER-1985-010, :on 850205,audit Determined That 6-month Leak Test on 400-mCi Cs-137 Check Source Not Performed within Time Requirement.Caused by Incorrect Classification of Sealed Source.Applicable Records Corrected (← links)
- 05000275/LER-1985-007, :on 850204 & 05,control Room Ventilation Sys Automatically Transferred from Normal Mode to Pressurization Mode.Caused by Contractor Technician Performing Startup Testing on Unit 2 Solid State Protection Sys (← links)
- 05000275/LER-1984-024, :on 840810,w/reactor in Mode 3,surveillance Requirement to Functionally Test Fire Detection Sys Supervisory Circuitry Not Performed within 6 Months. Administrative Controls Improved (← links)
- 05000275/LER-1984-023, :on 840730,diesel Generators 1-1,1-2 & 1-3 Started Automatically in Response to Loss of Startup Bus Voltage.Caused by Personnel Isolating Plant from 230 Kv Offsite Startup Power.Personnel Counseled (← links)
- 05000275/LER-1984-022, :on 840728,safety Injection & Reactor Trip Occurred Due to lo-lo T Average & High Steam Flow Signals. Caused by Personnel Not Considering Effect of Low RCS Signal on Safety Injection Actuation Logic (← links)
- 05000275/LER-1984-020, :on 840719,diesel Generator 103 Automatically Started Due to Undervoltage on Unit 2 Bus F.Caused by Const Workers Inadvertently Jarring Relay Panel & Actuating Undervoltage Relay (← links)
- 05000275/LER-1984-021, :on 840720,reactor Protection Sys Actuated Due to Coincidence of Steam Generator 1-3 Low Level & Steam Flow/Feed Flow Mismatch.Caused by Failed Valve Operator. Valve Operator Replaced (← links)
- 05000275/LER-1984-019, :on 840714,control Room Ventilation Sys Activated & Transferred to Pressurization Mode.Caused by Error in Drawing 458828 Showing Slave Relay K605 as Closed Contact Instead of Open (← links)
- 05000275/LER-1984-018, :on 840706,portion of ESF (Control Room Ventilation Sys) Actuated in Response to Spurious Radiation Monitor Alarm Signal.Caused by Failed Detector.Detector Replaced.Sys Tested & Returned to Svc (← links)
- 05000275/LER-1984-017, :on 840629,plant Vent Iodine & Particulate Flow Rate Monitor FIS-24 Declared Inoperable When Monitor Failed Functional Test.On 840709,discovered Incorrect Action Statement Entered.Flow Switch Adjusted (← links)
- 05000275/LER-1984-025, :on 840826,containment Purge Sys Noble Gas Activity Monitors RM-14A & 14-B Inoperable.Caused by Personnel Blocking Containment Isolation Signal from Monitor 14-B While Removing 14-A from Svc for Mod (← links)
- 05000275/LER-1984-015, :on 840508,high Steam Flow Coincident w/low-low Tavg Reactor Trip & Safety Injection Initiated Due to Opened Steam Dump Valves.Caused by Steam Dump Control Sys Malfunction.Pressure Control Module Replaced (← links)
- 05000275/LER-1984-014, :on 840506,while in Mode 2,spurious Reactor Protection Sys Signal Resulted in Reactor Trip.Caused by Faulty Temp Modifier in Protection Set II Control Cabinet. Component Replaced (← links)
- 05000275/LER-1984-007, :on 840309,120-volt Vital Instrument Ac Bus 1-3 Deenergized,Resulting in Automatic Operation of Two Esfs. Caused by Failure of Operator to Recognize That Breaker Closed.Inverter Panels Labeled (← links)
- 05000275/LER-1984-006, :on 840217,four 4.16 Kv Circuit Breakers Failed to Remain Closed.Caused by Excessive Wear in Teflon Coated Fiberglass Sleeve Bearings Used in Mechanical Actuator. Breakers Repaired (← links)
- 05000275/LER-1983-031-03, /03L-0:on 831122,discovered That Tech Spec 4.9.6.2 Re Load Testing of Auxiliary Hoist Performed Approx 240 H Prior to Use of Hoist,Contrary to 100 H Requirement.Caused by Misinterpretation of Tech Spec (← links)
- 05000275/LER-1984-012, :on 840401,instrumentation & Control Technician Performing Maint Misread Procedure & Opened Ac & Dc Power Supply Breakers for Maint Annunciator Panels.Policy Directives & Technician Training Initiated (← links)
- 05000275/LER-1984-013, :on 840407,while in Mode 3,both Subsystems to ECCS Discovered Inoperable Since 840406.Caused by Operator Failing to Identify That Limiting Condition for Operation Exceeded & Operative Procedures Revised (← links)
- 05000275/LER-1984-011, :on 840330,diesel Generator 1-3 Automatically Started When 4 Kv Bus F Potential Transformer Fuse Drawer Pulled Out During Wire Trace.Caused by Personnel Error. Labels Placed on Fuse Drawers (← links)
- 05000275/LER-1984-010, :on 840326,during Surveillance Test,Liquid Radwaste Effluent Line Isolation Valve Failed to Close. Caused by Personnel Error in Procedural Control of Jumper. Jumper Removed & Valve Returned to Svc (← links)
- 05000275/LER-1984-008, :on 840315,inadvertent Safety Injection Actuation Experienced.Caused by Failure of Technician to Follow Procedure While Performing Surveillance Test on Train A.Technician Counseled (← links)
- 05000275/LER-1983-033-03, /03L-0:on 831202,source Range Instrumentation Channels Deenergized for 2 Minutes During Surveillance Test. Caused by I&C Technician Failing to Follow Written Procedure.I&C Personnel Instructed (← links)
- 05000275/LER-1983-036-03, /03L-0:on 831211,one Train of Control Room Ventilation Sys Inoperable for 31 Minutes.Caused by Thermal Overload Trip of Fan S-36.Fan Reset.Investigation Revealed Need to Rewind Fan Motor (← links)
- 05000275/LER-1983-035-03, /03L-0:on 831201,fire Suppression Spray & Sprinkler Sys & Cardox Sys Valve Positions Not Verified. Caused by Personnel Overlooking Addl Data Sheets Provided by Procedure Amend.Personnel Instructed (← links)
- 05000275/LER-1983-026-03, /03L-0:on 831114,prior to Fuel Load,Power Switch to Plant Vent Iodine Sampler RE-24 Found in Off Position. Caused by Personnel Error During Heavy Const Period. Protective Cover Will Be Placed Over Switch (← links)
- 05000275/LER-1983-027-03, /03L-0:on 831117,diesel Generator 1-2 Air Receiver 1-2a Fell Below Min Pressure Setpoint.Caused by Starting Air Compressor 1-2A Internal Relief Valve Not Reseating.Relief Valve Replaced (← links)
- 05000275/LER-1983-032-01, /01T-0:on 831205,fire Barrier Penetration Seal in RHR Pump 1-1 Room Discovered Nonfunctional.Maint Personnel Did Not Locate Fire Penetration Due to Insufficient Info on Work Request (← links)
- 05000275/LER-1983-030-03, /03L-0:on 831116,discovered That Tech Spec Surveillance Requirement 4.3.3.3.1 for Channel Functional Test of Triaxial Time History Accelographs Not Performed. Caused by Personnel Error (← links)
- 05000275/LER-1983-028-01, /01T-0:on 831130,air Gap Visible on Upper 25% of Containment Equipment Door.Review of Records Indicated Condition Existed During Initial Fuel Load.Procedure Change Made to Inspect Hatch & Add Bolts (← links)
- 05000275/LER-1981-003-03, Liquid Radwaste Effluent Line Radiation Monitor RM-18 Found Inoperable.Caused by Separated Ctr Wire in Coax Connector Cable at Junction Between Connector Pin & Wire.Design Revised (← links)
- 05000275/LER-1983-025-03, /03L-0:on 831021,steam Generator Blowdown Tank Vent Gross Activity Monitor RM-27 Failed Downscale While in svc.RM-27 Failed as Result of Random Failure of U-2 Bistable Multivibrator.Bistable Replaced (← links)
- 05000275/LER-1983-024-03, /03L-0:on 831007,all Main Control Room Annunciators Lost During Const Activity in Annunciator Cabinets.Caused by Const Worker Inadvertently Grounding Hot wire,short-circuiting Panel.Power Restored (← links)
- 05000275/LER-1983-021-03, /03L-0:on 830925,primary Meteorological Tower Air Temp Aspirator Failed,Rendering Differential Air Temp Sensing Instrument Inoperable for 48 H.Caused by Electrical Connector Short Due to Exposure to Environ (← links)
- 05000275/LER-1983-023-01, /01T-0:on 831012,util Informed by Pacific Scientific Co of Potential Problem W/Certain Serial Number PSA-1 & PSA-3 Snubbers.Insp Revealed Microcracks in Capstan Spring Tangs.Caused by Stress (← links)
- 05000275/LER-1983-019-03, Welding Performed on Additive Tank W/O First Draining Tank of Sodium Hydroxide Solution.Caused by Lack of Communication to Field.No Evidence of Cracks or Corrosion Observed (← links)
- 05000275/LER-1983-020-03, /03L-0:on 830723,prior to Fuel Load,Gaseous Radwaste Sys Noble Gas Activity Monitor RM-22 Failed in Svc. Caused by Detector Tube Failure Due to Natural end-of-life. New Tube Installed & Monitor Tested (← links)
- 05000275/LER-1983-022-03, /03L-0:on 830831,valve MU-0-268 Shut for 36 Minutes,Isolating Raw Water Reservoir from Fire Suppression Header,Rendering Fire Suppression Water Sys Inoperable. Caused by Broken Underground Water Supply Line (← links)
- 05000275/LER-1984-003, :on 840116,plant Experienced Spurious Safety Injection Actuation While in Cold Shutdown.Caused by Momentary Voltage Drop on Instrument Ac Bus 1-1.No Corrective Actions Planned (← links)
- 05000275/LER-1984-005, :on 840116,diesel Generator 1-2 Automatically Started Due to 4 Kv Startup Power Bus Undervoltage.Caused by Operator Inadvertently Isolating Startup Transformer 12 from 4 Kv Vital Bus Feeder (← links)
- 05000275/LER-1984-002, :on 840107,both Trains of Control Room Ventilation Sys Powered by Same 480-volt Vital Bus.Caused by Operator Failure.Operator Trained & Operating Procedure Revised (← links)
- 05000275/LER-1984-001-01, :on 840106,inadvertent Safety Injection Actuation Occurred.Caused by Momentary Grounding of Ac Supply to Solid State Protection Sys Slave Relay Circuit. Operators Reinstructed on Procedures (← links)
- 05000275/LER-1983-008-03, /03L-0:on 830510,const Electrician Inadvertently Deenergized New Fuel Storage Area Monitor (RM-5) & Oily Water Separator Effluent Line Monitor (RM-3),resulting in Loss of Bus 1-1A.Caused by Lifting Wrong Wire (← links)
- 05000275/LER-1983-016-03, /03L-0:on 830606,plant Vent Flow Rate Monitor FR-12 Discorerd Deenergized.Caused by Personnel Error. Personnel Cautioned to Research Clearance Requests Prior to Approval (← links)
- 05000275/LER-1983-018-03, /03L-0:on 830715,discovered Raw Water Reservoir Isolated from Fire Suppression Header,Rendering Fire Suppression Water Sys Inoperable.Caused by Failure to List Valve MU-O-274 on Checklist (← links)
- 05000275/LER-1983-015-03, /03L-0:on 830526,annunciator Window in Channel Functional Test Procedure for Vent Iodine Sampler RM-24 Failed to Alarm.Caused by Lack of Updated Procedures to Reflect Design Change.Procedure Updated (← links)
- 05000275/LER-1983-011-03, /03L-0:on 830518,prior to Fuel Load,Discovered Source Check of Oily Water Separator Effluent Line Monitor Not Performed Monthly.Caused by Administrative Error During Procedure Rev (← links)
- 05000275/LER-1983-012-03, /03L-0:on 830518,prior to Fuel Load,Air Sample Pumps for Plant Vent Radiation Monitors Found Tripped.Caused by Excessive Debris Clogging Radiation Monitor Filter Paper Due to Const Activities (← links)
- 05000275/LER-1983-013-03, /03L-0:on 830518,prior to Fuel Load,Air Sample Pumps for Plant Vent Radiation Monitors RM-14A & B Inoperable.Caused by Removal of Control & Instrument Fuses for Work Inside RM28 a & B Cabinet (← links)
- 05000275/LER-1983-005-04, /04X-0:on 830502,prior to Fuel Load & Following Coalinga Earthquake,Unusual Event Declared Based on Earthquake Motion Felt at Plant w/.5 G Full Upscale Indication.Caused by Faulty Reset Switch (← links)
- 05000275/LER-1983-009-03, /03L-0:on 830505,power Switch to Plant Vent Iodine Sampler (RE-24) Found in Off Position.Power Switch Inadvertently Moved to Off Position During Const.Const Personnel Cautioned (← links)
- 05000275/LER-1983-010-03, /03L-0:on 830514,prior to Fuel Load,Power to All Main Control Room Annunciators Lost During Const in Annunciator Cabinets.Caused by Electrician Touching Hot Wire to Ground,Short Circuiting Panel (← links)
- 05000275/LER-1983-014-01, /01T-0:on 830526,during Adjustment of Limitorque Operator,Binding of Torque Switch Observed.Cause Under Investigation.Torque Switch Mounting Bolts Substituted for Original Bolts (← links)
- 05000275/LER-1983-006-01, /01T-0:on 830510,possible Undersize Condition Found on Weld WIB-RC 2-17.Cause Under Investigation.Below Min Wall Thickness Welds to Be Analyzed or Repaired Per ASME Section XI (← links)
- 05000275/LER-1983-007-01, /01T-0:on 830509,water Leaked from Weld Area of Reinforcement Pad on Branch Connection to non-vital Loop C Component Cooling Water Sys.Caused by Flaw in Root Pass of Shop Weld.Repairs to Be Made (← links)
- 05000275/LER-1983-003-03, /03L-0:on 830414,control Operator Unable to Achieve Satisfactory Check Source Reading on Liquid Radwaste Discharge Line Radiation Monitor (RE-18).Caused by Missing Check Source from Monitoring Mechanism (← links)
- 05000275/LER-1983-002-03, /03L-0:on 830113,prior to Fuel Load,Liquid Radwaste Effluent Flow Recorder Discovered Inoperable During Discharge of Tank in Liquid Radwaste Sys.Caused by Out of Tolerance Flow Transmitter.Transmitter Cleaned (← links)
- 05000275/LER-1983-001-03, /03L-0:on 830107,during Recorder Check Prior to Fuel Load,Steam Generator Blowdown Multipoint Flow Recorder 1-71 Discovered Inoperable.Caused by Broken Print Head Drive String.String Replaced (← links)
- 05000275/LER-1982-012-01, /01T-0:on 821206,radiation Survey of Spent Fuel Pool Not Performed in Accordance W/Tech Spec 3.3.3.1.Caused by Personnel Error.Technician Counseled (← links)
- 05000275/LER-1982-011-03, /03L-0:on 821024,steam Generator Blowdown Effluent Line Flow Rate Measurement Device FR-53 Found Inoperable Prior to Fuel Load.Caused by Worn Motor Gear Assembly. Design Change Will Correct Erroneous Readings (← links)
- 05000275/LER-1982-010-01, /01T-0:on 821102,liquid Radwaste Sys Tank Discharge Initiated W/O Liquid Radwaste Effluent Monitor RE-18 Operable.Caused by Instrument Being Tagged Improperly. Procedure Revised (← links)
- 05000275/LER-1982-009-01, /01T-0:on 821007,testing on Auxiliary Saltwater Sys Revealed Sys Susceptible to Water Hammer Effects During Anticipated Operational Transients.Caused by Water Column Separation & Recombination at Piping Slope Change (← links)
- 05000275/LER-1982-008-03, /03L-0:on 820603,control Room Plant Vent Radiation Alarm on Plant Vent Iodine Monitor RE24 Sounded.Caused by Spurious Low Background Radiation Indication.Monitor Had Not Been Reset Properly (← links)
- 05000275/LER-1982-007-03, /03L-0:on 820526,prior to Fuel Load,Control Room Received Alarm on Plant Vent Iodine Sampler (RE-24).Caused by Failure of Sample Pump Due to End of Vane Life.Pump Cleaned,Vanes Replaced & Oil Changed (← links)
- 05000275/LER-1982-006-03, /03L-0:on 820423,steam Generator Blowdown Tank Vent Sys Gross Activity Monitor Would Not Respond to Calibr Check Sources within Specified Range.Caused by Photomultiplier Tube end-of-life & Electronic Interference (← links)
- 05000275/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000275/LER-1982-002-03, /03L-0:on 820222,air Sample Pumps for Plant Vent Radiation Monitors (RM 14A & B) Found Tripped.Caused by Clogging of Rad Monitor Filter Paper W/Debris from Const Activities (← links)
- 05000275/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000275/LER-1982-004-03, /03L-0:on 820223 & 26,oily Water Separator Effluent Line Flow Rate Measurement Device (FR-251) Inoperable.Caused by Faulty Electronic Component on First Occasion & by Breakdown of Oscillator on Second (← links)
- 05000275/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000275/LER-1981-002-01, Error Discovered in Diagram Used to Locate Vertical Seismic Floor Response Spectra for Equipment & Sys Seismic Design.Caused by Erroneous Use of Unit 2 Diagram for Unit 1 (← links)
- 05000275/LER-1981-002, Forwards Updated LER 81-002/01X-6 (← links)
- 05000275/LER-1982-003-03, /03L-0:on 820212,prior to Fuel Load,Operators Received Vital Instrument Ac Panel Under Voltage Alarm in Control Room.Caused by Tripped Feeder Breaker to PY-15. Event Under Investigation (← links)
- 05000275/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000275/LER-1982-001-03, /03L-0:on 820129,during Audit Prior to Fuel Load, Communication Phone Mounted on Front Section of Hot Shutdown Panel Was Discovered Excluded from Seismic Analysis.Caused by Coordination Failure.Panel Will Be Reanalyzed (← links)
- 05000275/LER-1982-001, Forwards LER 82-001/03L-0 (← links)
- 05000275/LER-1981-010-03, /03L-0:on 811217,prior to Fuel Load,Documentation for Gross Gamma Analysis of Weekly Composite Sample for Oily Water Separator Discovered Missing for 811029-1119.Sheets Apparently Misplaced.Procedure Revised (← links)
- 05000275/LER-1981-010, Forwards LER 81-010/03L-0 (← links)
- 05000275/LER-1981-005-01, During Insp,Battery Cell Case Found Weeping.Further Insp Revealed 17 Cells W/Cracks Near Molded Support Ribs on Bottom of Cases.Caused by Inadequate Support of Cells.Racks Modified & Cells Replaced (← links)
- 05000275/LER-1981-005, Forwards Updated LER 81-005/01X-1 (← links)
- 05000275/LER-1981-009-03, /03L-0:on 811211,operator Failed to Perform Daily Channel Check on Iodine Sampler Flow Rate Monitor.Caused by Inadequate Instructions for Verifying Annunciator Window Operability.Procedure Change Issued (← links)
- 05000275/LER-1981-009, Forwards LER 81-009/03L-0 (← links)
- 05000275/LER-1981-007-03, /03L-0:on 811125,discovered That Tech Specs Surveillance Requirement 4.11.2.4.1 Re Project Doses Due to Gaseous Releases from Plant Not Performed within Required Time Interval.Caused by Personnel Oversight (← links)
- 05000275/LER-1981-007, Forwards LER 81-007/03L-0 (← links)
- 05000275/LER-1981-008-03, /03L-0:on 811130,discovered That Gross Alpha Activity Analysis Had Not Been Performed within Required Time Interval.Caused by Personnel Oversight.Sample Counted on 811130 (← links)
- 05000275/LER-1981-008, Forwards LER 81-008/03L-0 (← links)
- 05000275/LER-1981-006-03, /03L-0:on 811103,daily Channel Check on Plant Vent Flow Recorder Not Performed.Caused by Operator & Reviewer Failure to Note Step on Checklist.Operators Instructed & Procedure Simplified (← links)
- 05000275/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000275/LER-1981-005-03, /03L-0:on 811015,prior to Fuel Load,During Insp in Conjunction W/Surveillance Testing,Battery Cell Case Found Weeping.Apparently Caused by Inadequate Support Leading to Cracking.Investigation Underway Re Mods (← links)
- 05000275/LER-1981-003, Forwards LER 81-003/03L-0 (← links)
- 05000275/LER-1981-004-03, /03L-0:on 810922,during Core Load Status Review, Oily Water Separator Effluent Line Radiation Monitor Found Invalidated.Caused by Unauthorized Readjustment of Monitor Controls.Monitor to Be Recalibr & Personnel Trained (← links)
- 05000275/LER-1981-004, Forwards LER 81-004/03L-0 (← links)
- 05000275/LER-1981-001-01, /01T-0:on 810922,prior to Fuel Load,Review of Reportability of Inoperable Plant Vent Rod Monitoring Channels RM-14A & B Revealed That Required STS 3.3.3.10 Action Statements 52 & 53 Had Not Been Entered (← links)
- 05000275/LER-1981-001, Forwards LER 81-001/01T-0 (← links)
- 05000275/LER-1983-017-03, /03L-0:on 830706,power Supply Circuit Breaker for Oily Water Separator Effluent Flow Monitor (FR-251) Tripped Open & Would Not Reset.Cause Undetermined.Breaker Replaced (← links)
- 05000275/LER-1994-014, :on 940426,SG 1-2 Automatically Started When Two Indicating Light Sockets Shorted Together Due to Personnel Error.Description of Event & Lessons Learned Will Be Published in Operations Incident Summary (← links)
- 05000275/LER-2015-002, Regarding Environmental Qualification of Wide Range Resistance Temperature Detectors Wiring Exceeded (← links)
- 05000275/LER-2015-001, Regarding Both Trains of Residual Heat Removal Inoperable Due to Circumferential Crack on a Socket Weld (← links)
- 05000275/LER-2014-003-02, Regarding Unanalyzed Condition Affecting Emergency Diesel Generators, Tornado Missiles (← links)
- 05000275/LER-2014-004, Actuation of Six Emergency Diesel Generators Due to Loss of Offsite Power (← links)
- 05000275/LER-2014-003-01, Regarding Unanalyzed Condition Affecting Unit 1 and 2 Emergency Diesel Generators, Tornado Missiles (← links)
- 05000275/LER-2013-009-01, Regarding Unanalyzed Condition Affecting Unit 1 Emergency Diesel Generators (← links)
- 05000275/LER-2014-003, Regarding Unanalyzed Condition Affecting Unit 1 and 2 Emergency Diesel Generators, Tornado Missiles (← links)
- 05000275/LER-2014-001, Regarding Technical Specification 3.4.3, Reactor Coolant System Pressure Limit Violation During Vacuum Refill Due to Human Error (← links)
- 05000275/LER-2013-010, Regarding Two Emergency Diesel Generators Inoperable Due to Operator Error (← links)
- 05000275/LER-2013-009, Regarding Unanalyzed Condition Affecting Unit 1 Emergency Diesel Generators (← links)
- 05000275/LER-2013-006-01, Regarding Emergency Diesel Generators Valid Start Signal Due to Loss of Startup Power (← links)
- 05000275/LER-2013-008, Regarding Technical Specification 3.3.4 Not Met Due to Inoperable Remote Shutdown System Function (← links)
- 05000275/LER-2013-003-01, Regarding Actuation of Six Emergency Diesel Generators Due to Loss of Offsite Power (← links)
- 05000275/LER-2013-006, Regarding Emergency Diesel Generators Valid Start Signal Due to Loss of Startup Power (← links)
- 05000275/LER-2013-004, Regarding All Three Unit 1 Emergency Diesel Generators Momentarily Inoperable (← links)
- 05000275/LER-2013-005, Both Trains of Residual Heat Removal Inoperable Due to Circumferential Crack on a Socket Weld (← links)
- 05000275/LER-2013-003, Regarding Actuation of Six Emergency Diesel Generators Due to Loss of Offsite Power (← links)
- 05000275/LER-2012-005-01, Regarding Unanalyzed Condition Due to Nonconservative Change in Atmospheric Dispersion Factor (← links)
- 05000275/LER-2013-001, Noncompliance with TS 3.4.12, Low Temperature Overpressure Protection System Due to Human Error (← links)
- 05000275/LER-2012-007-01, Inadequately Compensated Non-Conformances in the Fire Protection Program (← links)
- 05000275/LER-2012-008, Regarding Loss of Control Room Ventilation System Due to Inadequate Design Control (← links)
- 05000275/LER-2011-008-01, Control Room Ventilation System Design Vulnerability (← links)
- 05000275/LER-2011-007-02, Inadequate Control Room Envelope Testing Due to Inadequately-Documented In-leakage Test Data (← links)
- 05000275/LER-2012-007, Regarding Inadequately Compensated Non-Conformances in the Fire Protection Program (← links)
- 05000275/LER-2012-006, Regarding Violation of Technical Specifications Due to Incorrect Bases (← links)
- 05000275/LER-2012-005, Regarding Unanalyzed Condition Due to Nonconservative Change in Atmospheric Dispersion Factor (← links)
- 05000275/LER-2012-004, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable (← links)
- 05000275/LER-2012-003, Regarding Low Temperature Overpressure Protection System Inoperable Due to Human Performance Error (← links)
- 05000275/LER-2012-002, Regarding Failure to Comply with Technical Specification 3.0.3 Time Requirement (← links)
- 05000275/LER-2011-007-01, Regarding Inadequate Control Room Envelope Testing Due to Inadequately - Documented In-leakage Test Data (← links)
- 05000275/LER-2011-006-01, Loss of Control Room Envelope Due to the Work Control Shift Foreman Incorrectly Authorizing Removal of a Blank Flange (← links)
- 05000275/LER-2011-008, Regarding Control Room Ventilation System Design Vulnerability (← links)
- 05000275/LER-2011-007, For Diablo Canyon, Unit 1, Inadequate Control Room Envelope Testing Due to Inadequately-Documented In-Leakage Test Data (← links)
- 05000275/LER-2011-005-01, 1 for Diablo Canyon Unit 1, Emergency Diesel Generator Actuations Upon Loss of 230 Kv Startup Due to Electrical Maintenance Testing Activities (← links)
- 05000275/LER-2011-004-01, 1 for Diablo, Unit 1, Regarding Emergency Diesel Generator Actuated Upon 230 Kv Isolation Due to Maintenance Activities on Relay Panel (← links)
- 05000275/LER-2011-006, For Diablo Canyon, Unit 1, Regarding Loss of Control Room Envelope Due to the Work Control Shift Foreman Incorrectly Authorizing Removal of a Blank Flange (← links)
- 05000275/LER-2011-005, For Diablo Canyon Power Plant, Unit 1 - Emergency Diesel Generator Actuations Upon Loss of 230 Kv Startup Due to Electric Maintenance Testing Activities (← links)
- 05000275/LER-2011-004, For Diablo Canyon Power Unit 1, Regarding Emergency Diesel Generators Actuated Upon 230-kV Isolation Due to Maintenance Activities on Relay Panel (← links)
- 05000275/LER-2011-003, Regarding Deviation from License Condition for Physical Protection Due to Tsunami Events (← links)
- 05000275/LER-2011-002, For Diablo Canyon, Unit 1, Regarding Single Failure Vulnerability of Unit 1 & 2 Auxiliary Building Ventilation System (← links)
- 05000275/LER-2011-001, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable (← links)
- 05000275/LER-2010-003, DCPP 230 Kv Historical Evaluation of Condition Prohibited by Technical Specification (← links)
- 05000275/LER-2010-002-01, Potential Loss of Safety-Related Pumps Due to Degraded Voltage During Postulated Accidents (← links)
- 05000275/LER-2010-001, Regarding 2008 Loss of Auxiliary Building Ventilation System Exhaust Fans (← links)
- 05000275/LER-2009-002, Two Trains of Auxiliary Feedwater Inoperable Due to Protection System Failure (← links)
- 05000275/LER-2009-001, Regarding Replacement Steam Generator Support Inadequate Due to Improper Washer Plate Installation (← links)
- 05000275/LER-2008-001, Potential Accumulator Drain Line Actuation Following a LOCA Due to Solenoid Valve Failure (← links)
- 05000275/LER-2007-003, Emergency Diesel Generator Actuation Due to a Transient Undervoltage Condition (← links)
- 05000275/LER-2007-002, From Diablo Canyon, Unit 1, Manual Reactor Trip in Mode 3 During Control Rod Testing (← links)
- 05000275/LER-2007-001, Re Emergency Diesel Generator Auto-Start on Loss of Offsite 230kV Startup Power (← links)
- 05000275/LER-2006-001, Regarding Excessive Dead Birds Found at the Pacific Ocean Cooling Water Intake (← links)
- 05000275/LER-2005-001, Steam Generator Tube Plugging Due to Stress Corrosion Cracking (← links)
- 05000275/LER-2004-002, Regarding Technical Specification (TS) 3.0.3 Required Shutdown Due to TS 3.7.7, Vital CCW System, Limiting Condition for Operation (LCO) Not Met (← links)
- 05000275/LER-2004-001, Regarding Steam Generator Tube Plugging Due to Stress Corrosion Cracking (← links)
- 05000275/LER-2003-001, Regarding Technical Specification 3.8.1, Action B.1, Not Met Due to Personnel Error (← links)
- 05000275/LER-2003-007-01, Re Technical Specification 3.8.4 Violation Due to Common Mode Battery Charger Failures (← links)
- 05000275/LER-2003-007, From Diablo Canyon Unit 2 Regarding TS 3.8.4 Violation Due to Common Mode Battery Charger Failures (← links)
- 05000275/LER-2002-003-01, Unanalyzed Condition Due to Heavy Load Movement Over a Restricted Area (← links)
- 05000275/LER-2002-005, Re Technical Specification 3.4.10 Not Met During Pressurizer Safety Valve Surveillance Testing Due to Random Lift Setting Spread from Diablo Canyon Unit 1 (← links)
- 05000275/LER-2002-004, Automatic Reactor Trip on Low Steam Generator Level Due to Feedwater Flow Control Valve Closure on June 3, 2002 (← links)
- 05000275/LER-2002-002, Re Steam Generator Tube Plugging Due to Stress Corrosion Cracking (← links)
- 05000275/LER-2001-004-01, PAM Report 01-06 - Post Accident Monitoring (PAM) Instrumentation (← links)
- 05000275/LER-2002-001, Fasteners Failed Due to Stress Corrosion Cracking (← links)
- ML12170A837 (← links)
- ML110060174 (redirect page) (← links)
- 05000275/LER-2011-008-01, Control Room Ventilation System Design Vulnerability (← links)
- 05000275/LER-2011-007-02, Inadequate Control Room Envelope Testing Due to Inadequately-Documented In-leakage Test Data (← links)
- 05000275/LER-2011-007-01, Regarding Inadequate Control Room Envelope Testing Due to Inadequately - Documented In-leakage Test Data (← links)
- 05000275/LER-2011-001-01, For Diablo Canyon, Unit 1, Regarding Mode Transition with Turbine-Driven Auxiliary Feedwater Pump 1-1 Inoperable (redirect page) (← links)
- ML12030A024 (redirect page) (← links)
- 05000275/LER-2011-001-01 (redirect page) (← links)
- 05000275/LER-2011-006-01, Loss of Control Room Envelope Due to the Work Control Shift Foreman Incorrectly Authorizing Removal of a Blank Flange (← links)
- 05000275/LER-2011-008, Regarding Control Room Ventilation System Design Vulnerability (← links)
- 05000275/LER-2011-007, For Diablo Canyon, Unit 1, Inadequate Control Room Envelope Testing Due to Inadequately-Documented In-Leakage Test Data (← links)
- 05000275/LER-2011-005-01, 1 for Diablo Canyon Unit 1, Emergency Diesel Generator Actuations Upon Loss of 230 Kv Startup Due to Electrical Maintenance Testing Activities (← links)
- 05000275/LER-2011-004-01, 1 for Diablo, Unit 1, Regarding Emergency Diesel Generator Actuated Upon 230 Kv Isolation Due to Maintenance Activities on Relay Panel (← links)
- 05000275/LER-2011-006, For Diablo Canyon, Unit 1, Regarding Loss of Control Room Envelope Due to the Work Control Shift Foreman Incorrectly Authorizing Removal of a Blank Flange (← links)
- 05000275/LER-2011-005, For Diablo Canyon Power Plant, Unit 1 - Emergency Diesel Generator Actuations Upon Loss of 230 Kv Startup Due to Electric Maintenance Testing Activities (← links)
- 05000275/LER-2011-004, For Diablo Canyon Power Unit 1, Regarding Emergency Diesel Generators Actuated Upon 230-kV Isolation Due to Maintenance Activities on Relay Panel (← links)
- 05000323/LER-2011-001, For Diablo Canyon Regarding Unit 2 Reactor Trip from Loss of Main Feedwater Pump 2-1 (← links)
- 05000275/LER-2011-003, Regarding Deviation from License Condition for Physical Protection Due to Tsunami Events (← links)
- 05000275/LER-2011-002, For Diablo Canyon, Unit 1, Regarding Single Failure Vulnerability of Unit 1 & 2 Auxiliary Building Ventilation System (← links)