Pages that link to "05000445/LER-2004-001, (CPSES) Condition Prohibited by Technical Specifications"
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The following pages link to 05000445/LER-2004-001, (CPSES) Condition Prohibited by Technical Specifications:
Displayed 7 items.
- 05000445/LER-2004-001 (redirect page) (← links)
- 05000445/LER-2001-004 (← links)
- 05000445/LER-2001-003 (← links)
- 05000445/LER-2001-002 (← links)
- 05000445/LER-2001-001 (← links)
- 05000445/LER-1993-010, Forwards LER 93-010-00 Re Hot Particle Contamination Resulting in Exposure Exceeding 10CFR20 Skin Dose Limits (← links)
- 05000445/LER-1999-001, Forwards LER 99-001-00, Some Electrical Contacts for RCS Pressure Relief Valves Were Not Included in Surveillance Testing Procedures. New Licensing Commitments Identified in Attachment 1 (← links)
- 05000445/LER-2024-002-01, Condition Prohibited by Technical Specifications Due to Inoperable Remote Shutdown System Functions (← links)
- 05000445/LER-2024-001, Re Potential Loss of Safety Function Due to Inoperability of Both Trains of Uninterruptible Power Supply Heating, Ventilation & Air Conditioning (← links)
- 05000445/LER-2023-001-01, (Cpnpp), Automatic Reactor Trip Due to Lo-Lo Steam Generator Level (← links)
- 05000445/LER-2023-001, Automatic Reactor Trip Due to Lo-Lo Steam Generator Level (← links)
- 05000445/LER-2022-001, (Cpnpp), Reactor Trip Due to Turbine Trip Greater than 50% Power (← links)
- 05000445/LER-2020-001, Main Feedwater Pump Failure to Trip (← links)
- 05000445/LER-1998-004, :on 980427,failure to Perform Response Time Testing of Shunt Trip Feature of Reactor Trip Breaker.Caused by Failure to Recognize Difference in Functional Designs. Breaker Was Declared Inoperable & Test Was Performed (← links)
- 05000445/LER-1997-004, :on 980408,issues Discovered During Review of GL 96-01 Associated W/Ts Surveillances.Caused by Inadequate Test Procedures.Revised Applicable Test Procedures to Include Testing When Alternate Power Is in Service (← links)
- 05000445/LER-1997-004-06, Forwards LER 97-004-06 Re Issues Discovered During Review of GL 96-01 Associated W/Ts Surveillances.No New Licensing Basis Commitments Re CPSES Contained in Communication (← links)
- 05000445/LER-1997-004-07, Informs That Util Determined That No Addl Info Is Required to Be Submitted,As Committed to in Re LER 97-004-07.Licensee Believes That Accurately Documents Deficiencies Identified During GL 96-01 Reviews (← links)
- 05000445/LER-1998-005, :on 980617,functional Requirements of Hps Was Not IAW Design.Caused by Failure to Completely Evaluate FSAR Impact on Design Basis.Developed post-accident Recovery Guidance & Design Mod to Allow Use of 12 Inch Inlet Valve (← links)
- 05000445/LER-1998-003, :on 980406,SG Tube Plugging Was Noted.Caused by Stress Corrosion Cracking.Plugged All Defective Tubes Identified During Current Refueling Outage (← links)
- 05000445/LER-1999-004-01, :on 990830,some Grated Surfaces Were Noted Outside Design Basis.Caused by Use of Friction Type Grating Fasteners.Mods to Enhance Platforms Are Being Implemented. with (← links)
- 05000445/LER-1999-005, :on 990830,potential Common Cause Failure Identified in Jrak Relief Valves.Caused by Pressure Surges Sys.Pressure Surges Sys Have Been Implemented.With (← links)
- 05000445/LER-1997-004-03, Forwards LER 97-004-003,re Issues Dicovered During Review of GL 96-01 Associated W/Ts Surveillances (← links)
- 05000445/LER-1997-004-05, Forwards LER 97-004-05,re Issues Discovered During Review of GL 96-01,associated W/Ts Surveillances.Communication Contains No New Licensing Basis Commitments Re Cpses,Units 1 & 2 (← links)
- 05000445/LER-1997-007, :on 970820,post-work Testing for Containment Isolation Valve Was Not Performed After Maint.Caused by Incorrect Belief That Work Did Not Involve Replacement. Tested Valve IAW TS Requirements (← links)
- 05000445/LER-1997-005, :on 961004 & 05 MSSVs Failed Initial Lift Pressure Test.Cause Could Not Be Determined.Improved Std TS Submitted to NRC (← links)
- 05000445/LER-1997-008-01, Forwards LER 97-008-01 Re Min Gap for Cold Leg Injection ECCS Throttle Valves Not IAW Design.Suppl Issued to Revise Implementation of Cas.Commitment Made by Util,Provided (← links)
- 05000445/LER-1998-001, :on 980110,discovered Entry Into TS 3.0.3 When Feedwater Isolation Valves Were Declared Inoperable Due to Low Nitrogen Pressure.Caused by Degraded Elastomer Seal. Restored Nitrogen Pressure (← links)
- 05000445/LER-1997-009, :on 971027,reactor Trip Initiated Due to Main Turbine Generator Trip.Caused by Slow Operation of East Bus Supply Breaker.Inspected & Exercised East Bus Supply Breaker & Chartered Task Team to Evaluate Event (← links)
- 05000445/LER-1997-004-01, Forwards LER 97-004-01 Re Issues Discovered During Review of GL 96-01 Associated W/Ts Surveillances at Cpses,Unit 1. Condition Discovered on 971009 & Reported on 971025. Commitments Re CPSES Units 1 & 2 as Noted in Attachmen (← links)
- 05000445/LER-1997-010, :on 971212,TS Required Shutdown Due to Inoperable Solid State Safeguards Sequencer.Caused by Output Relay Coil Continuity Failed.Failed Lamp Was Replaced & Sys Was Declared Operable on 971213 (← links)
- 05000445/LER-1997-006-01, Forwards LER 97-006-01 Re Discovery of Control Room HVAC Emergency Pressurization Unit to Be Outside TS Limits.Ler Issued to Document Addl Info Noted During Review of Event (← links)
- 05000445/LER-1990-035, :on 901011,potential common-mode Failure of HPSI Pumps Discovered Due to Incorrect Suction Vent Valve Application (← links)
- 05000445/LER-1997-004-02, Forwards LER 97-004-02 Re Issues Discovered During Review of GL 96-01 Associated W/Ts Surveillances (← links)
- 05000445/LER-1999-003-01, :on 990519,discovered Battery Surveillances Were Not Performed with Proper Periodicity as Required by Ts.Caused by Misinterpretation of Sr.Resistance Readings Taken,Noed Requested & LAR Requested.With (← links)
- 05000445/LER-1999-002-01, :on 990518,missed TS Surveillance for SG Gross Activity Composite Sampling Was Noted.Caused by Cognizant Personnel Being Distracted from Normal Duties.Sg Sample Was Taken IAW TS Appropriate TS Requirement.With (← links)
- 05000445/LER-1999-001-01, :on 990510,discovered That Some Electrical Contacts for RCS Pressure Relief Valves Were Not Included in Surveillance Testing Procedures.Caused by Less than Adequate Procedures.Revised Circuit Testing Procedures (← links)
- 05000445/LER-1998-008, :on 980918,CR HVAC Emergency Pressurization Unit Was Found to Be Outside TS Allowed Outage Time Limits. Caused by Heater Trips & Reduction in Airflow.Relocated Sensing Elements & Repaired Damper.With (← links)
- 05000445/LER-1998-006, :on 980831,discovered That TS Surveillance for HR Sys May Not Have Been Adequate.Caused by Improper Surveillance Methodology.Conducted Surveillance Testing of HRs & Revised Applicable Procedures.With (← links)
- 05000445/LER-1996-001-01, :on 960117,Units 1 Inverter IV1PC2 Output Breaker Tripped on Over Current.Caused by Large Tavg -Tref Error Signal Following Restoration of Power to Distribution Panel.Plat Stabilized to Mode 3 (← links)
- 05000445/LER-1997-003, :on 970514,sys Interaction Program Did Not Adequately Consider All Environ Effects Resulting from Postulated Ms & FW Line Crack Occurred.Caused by Implementation of Sys.Drains Plugged (← links)
- 05000445/LER-1997-001, :on 970124,identified Single Failure Outside of Design Basis.Caused by Failure to Identify Events as Credible Scenario During Design of Facility.Util Will Implement Design Mod on Each Unit (← links)
- 05000445/LER-1996-009, :on 961106,discovered 480v Switchgear Breakers Racked Out in Cubicle in Remove Position.Caused by Inadequate Plant Procedures.Placed Affected Breakers in Disconnect Position & Revised Procedures (← links)
- 05000445/LER-1996-008, :on 961017,two Pressurizer Safety Valves Were Found with Unsatisfactory Lift Setpoints.Caused by Setpoint Drift.Valves Were Returned to Operable Status Using Normal Rework for Components (← links)
- 05000445/LER-1993-010-02, :on 931120,hot Particle Contamination Resulted in Exposure Exceeding 10CFR20 Skin Dose Limits.Specific Causes Could Not Be Determined.Hot Particle Personnel Frequency Increased.Attachment 1 Partially Deleted (← links)
- 05000445/LER-1993-001, :on 930118,trip Blocks Were Not in Place for Switch Manipulation & Reactor Trip Occurred While Restoring Ssps to Normal Lineup.Caused by Personnel Error.Event Reviewed & Training & Procedure Revised (← links)
- 05000445/LER-1992-024, :on 921022,determined That Surveillance for Containment post-accident Water Level Instrumentation Did Not Include Check of Level Sensors.Caused by Personnel Error.Vendor Manual Will Be Amended (← links)
- 05000445/LER-1992-027, :on 921220,actuation Relay Inadvertently Energized,Resulting in Premature Closure of Two Open Msivs. Caused by Personnel Error.Certification for Test Engineer Revoked & Training Conducted for Personnel (← links)
- 05000445/LER-1992-026, :on 921203,discovered That Monthly Surveillance to Check for & Remove Water in Train B DG Fuel Oil Storage Tank Not Performed During Allowable Time Period.Caused by Personnel Error.Surveillance Performed (← links)
- 05000445/LER-1992-023, :on 921021,security Officer Appeared to Be Unconscious & Exhibited Abrasions Indicative of an Assault. Caused by Personal Relationships Among Security Personnel. Investigation Still in Progress (← links)
- 05000445/LER-1996-007, :on 960809,automatic Reactor Trip Occurred Due to Lightning Strike.Bypass Mod to RPS ESF Channels Initiated (← links)
- 05000445/LER-1996-006, :on 960411,rod Control Malfunction Resulted in Manual Rt.Replaced Bank Overlap Counter Circuit Board (← links)
- 05000445/LER-1996-005, :on 960310,entry Into TS 3.0.3 Occurred Due to Cracked Weld in SI Sys Piping.Removed & Replaced Cracked Weldment W/New Weld (← links)
- 05000445/LER-1992-025, :on 921023,equipment Failure Resulted in Drop of Four Control Bank B Group 1 Control Rods & Manual Reactor Trip.Caused by Inadequate Interior Cooling of Affected Rod Control Cabinet (← links)
- 05000445/LER-1992-002-01, :on 921012,manual Reactor Trip Due to Feedwater Flow Control Valve Failure.Pressure Regulators in Other Three Unit 1 FCVs & Four Unit 2 FCVs Were Verified to Be 0-125 Psig Regulators,As Required (← links)
- 05000445/LER-1992-021, :on 920516,electric Low Vacuum Trip Device Did Not Respond During Turbine Overspeed Surveillance Test & Several Faults Annunicated at Automatic Turbine Tester. Caused by Loose Wire.Wire Tightened (← links)
- 05000445/LER-1992-019, :on 920720,loss of Main Feedwater Resulted in Manual Reactor Trip Due to Rapidly Lowering SG Levels.Cause Unknown.Temporary Mod Installed to Bypass anti-water Hammer Interlock Circuits in Ssps (← links)
- 05000445/LER-1992-018, :on 920713,Westinghouse Informed Util of Significant Change in Evaluation Model,Resulting in Calculated Performance Outide Peak Temp Cladding Criteria. Licensing Document Change Initiated (← links)
- 05000445/LER-1992-017, :on 920626,main Steam Supply Valves to AFW Turbine Not Quarterly Close stroke-time Tested.Caused by Procedure Error.Review of Inservice Test Valve Data Will Be Conducted (← links)
- 05000445/LER-1996-004-01, :on 960326,potential Failure of Personnel Airlock Control Sys for Units Was Discovered.Caused by Failure to Consider All Design & Licensing Interfaces in Design Validation.Completed Procedure Changes (← links)
- 05000445/LER-1992-016, :on 920623,phase B Line Between Unit 1 Station Transformer (1ST) & 1ST MOD Switch Broke Causing ESF Actuation.Caused by Design Deficiency in Lines Between 1ST & 1ST MOD switch.1ST Phase B Connector Repaired (← links)
- 05000445/LER-1992-015, :on 920610,time Delay Relay Associated W/ Blackout Sequencing Circuit Inoperable.Caused by Faulty Design to Allow Plant to Transfer Offsite Electrical Power to Alternate Source.Mod Process Revised (← links)
- 05000445/LER-1992-014, :on 920611,loss of Main Feedwater Resulted in Manual Reactor Trip Due to Rapidly Lowering Steam Generator Levels.Replaced Circuit Cards Were Sent to Ssps Vendor for Further Testing (← links)
- 05000445/LER-1992-011, :on 920618,failure of thermo-lag Fire Barrier Endurance Tests Results in Some Raceways Declared Inoperable.Caused by Inadequate Vendor Installation Specs. Fire Watch Routes Adjusted (← links)
- 05000445/LER-1992-013, :on 920511,loss of Cooling Water Flow to Fuel Pool Heat Exchanger Occurred After Realignment.Caused by Personnel Error.Personnel Retrained & Reevaluated & Heat Exchanger X-02 Has Restricted Use (← links)
- 05000445/LER-1992-012, :on 920603,reactor Shutdown Initiated Per Procedure.Caused by Less than Adequate Procedure Control of Oil Return Valve.Repositioned Valve,Procedure Change Stating Required Position of Valve & Controls Applied (← links)
- 05000445/LER-1996-003, :on 960204,ESFA Occurred.Caused by Both MFW Pumps Tripped Due to Low Suction Pressure.Enhanced Existing Guidance for Sys Lineup & Sys Restoration (← links)
- 05000445/LER-1992-005, :on 920218,operator Misinterpreted Procedure Step & Inadvertently Unblocked Actuation Signal Causing ESF Actuation.Caused by Personnel Error.Event Reviewed.Personnel Trained (← links)
- 05000445/LER-1996-002-01, :on 960122,loss of MFW Flow Due to FW Isolation Valves Closing Resulted in Manual Rt.Caused by Less than Adequate Initial Troubleshooting Plan.Revised Operations Procedures (← links)
- 05000445/LER-1992-020, :on 920720,output of motor-driven Auxiliary Feedwater Pump 1-02 Was Higher than Combined Flow to SG 03 & 04.Caused by Design Not Permitting Operator to Verify That Valve Closed.Procedures to Be Revised (← links)
- 05000445/LER-1992-010, :on 920509,analog Channel Operational Test Not Performed Prior to Startup to Verify power-range Neutron Flux Low Setpoint.Caused by Personnel Error.Task Team Formed to Review Surveillance Test Process (← links)
- 05000445/LER-1992-009, :on 920508,reactor Tripped.Caused by Personnel Error During Testing.Appropriate Level of Positive Discipline Program Implemented for Individuals Involved & Cabinet Locking Scheme Modified (← links)
- 05000445/LER-1992-008, :on 920406,control Room Heating Ventilation & Air Conditioning (HVAC) Sys Realigned to Emergency Recirculation Mode.Caused by Personnel Error.Electrical Control Building AO Has Been Counselled (← links)
- 05000445/LER-1992-007, :on 920401,train B Diesel Generator Declared Inoperable to Perform Scheduled Preventive Maint.Caused by Personnel Error.Individual Counseled,Procedure Enhanced & Standardized Tracking Device Developed (← links)
- 05000445/LER-1995-007, :on 951119,ESFA Occurred.Caused by FW Recirculation Valve Failure to Open Due to Failure in Power Supply Card.Installed New Tracking Driver Card W/New M192 Fuse (← links)
- 05000445/LER-1995-005, :on 950831,power Operated Relief Valves Potentially Inoperable Due to non-conservative Setpoints. Raised PORV N Accumulator Low Pressure Alarm Setpoints to 90 Psig (← links)
- 05000445/LER-1991-010, :on 910322,discovered That Train B motor-driven Auxiliary Feedwater Pump Recirculation Test Line Isolation Valve Was One Quarter Turn Open.Possibly Caused by Personnel Error.Addl Guidance Was Provided to Operators (← links)
- 05000445/LER-1995-006, :on 950803,failed to Follow Operating Procedures Resulted in Operating Condition Outside TS Requirements.Revised Procedure CHM-517 to Assure TS 4.11.1 SR Applied to ETI Temporary Laundry Sys (← links)
- 05000445/LER-1992-002, :on 920115,discovered That Surveillance Requirement for Area Temp Monitoring Not Performed in TS Required Interval of Once Per 12 H.Caused by Personnel Error.Control Over Assignment Improved (← links)
- 05000445/LER-1992-001, :on 920108,reactor Tripped Due to High Primary Water Temp.Caused by Personnel Error While Taking Manual Control of Generator Primary Water Sys.Intensive Training Conducted for Crew Involved (← links)
- 05000445/LER-1995-004-01, Forwards Suppl LER 95-004-001 for CPSES Unit 1,because Time Requirements for Action Statements Not Met,Per Enforcement Discretion for Testing Tdafwp at Mode 3,granted by NRC (← links)
- 05000445/LER-1991-032, :on 911206,incomplete Calibr of Four Channels & Nonconserative Indication of Reactor Power Noted.Caused by Error in Wording of Work Order Instructions.Steps Have Been Revised in Surveillance Database (← links)
- 05000445/LER-1991-026, :on 911030,discovered That Pressurizer Safety Valves Inoperable.On 911028,valves Found to Have Setpoints 1% to 4% Less than TS Setpoint Tolerance.Caused by Inadequate Methodology.Valves Reset (← links)
- 05000445/LER-1992-006, :on 920311,discovered That Two Surveillance Work Orders Failed to Include Calibr Instructions for P-9 Interlock,Channels N41 & N43.Caused by Personnel Error. Event Reviewed by All Maint Personnel (← links)
- 05000445/LER-1992-004, :on 920206,discovered That 920130 Surveillance of Class 1E Battery Performed W/Battery in Equalize Rather than Float.Caused by Personnel Error.Personnel Involved Was Counseled.Battery Declared Operable (← links)
- 05000445/LER-1992-003, :on 920203,QA Surveillance Identified Invalid Boron Dilution Event Analyses.Caused by Inadequate Inputs & Methodology by Vendor.Design Basis of Boron Dilution Sys to Be Revised & Deficiencies Addressed (← links)
- 05000445/LER-1991-031, :on 911206,containment Ventilation Isolation Automatically Occurred Due to Overconservative Radiation Monitor Setpoint.Alarm Setpoint Recalculated & Procedure for Radioactive Effluent Releases Will Be Reviewed (← links)
- 05000445/LER-1991-029, :on 911204,handswitch Positions for Steam Supply Valves Left in pull-to-lock After Entering Mode 3, Defeating Automatic Function of Valves,Per TS 3.0.4.Caused by Personnel Error.Personnel Counselled (← links)
- 05000445/LER-1991-028, :on 911112,load Test Was Not Performed on Refueling Machine Auxiliary Monorail Hoist.Caused by Personnel Error.Personnel Involved Counseled on Need to Pay Attention to Detail (← links)
- 05000445/LER-1991-027, :on 911107,source-range Flux Doubling Signal Initiated,Actuating Inadvertent Boron Dilution Mitigation Function.Caused by Circuit Response to Power Supply Switchover.Procedure Changed (← links)
- 05000445/LER-1991-021, :on 910728,ESF Actuation Occurred.Caused by Lightning Strike.Design Mod to Switchyard to Enhance Reliability of Offsite Power Sources Partially Completed (← links)
- 05000445/LER-1995-002, :on 950505,automatic Reator Trip Occurred. Caused by Lightning Strike.Task Team Formed to Evaluate & Investigate Methods of Minimizing Effects of Lightning Strike (← links)
- 05000445/LER-1995-001-01, :on 950319,time Limit for TS Action Statement Requirements Exceeded When CR Radiation Monitor Was Out of Svc.Reemphasized Mgt Expectations (← links)
- 05000445/LER-1991-020, :on 910713,reactor Trip Resulting from Erratic Operation of Main Turbine Electrohydraulic Controller Occurred Due Turbine Trip Initiated by Hi-Hi Levels of SGs 1 & 2.Testing & Design Mods Performed (← links)
- 05000445/LER-1994-006, :on 941129,turbine Trip/Reactor Trip Due to Low Cooling Water Stator Flow Indication.For Each Condition Set of Parameters Was Selected & Examined to Confirm or Deny Condition (← links)
- 05000445/LER-1991-023, :on 911003,reactor Tripped Due to Erratic Operation of Main Turbine Electrohydraulic Controller.On 910713,reactor Tripped Due to Seal Problem on Hydraulic Fluid Pumps.Design Mod Initiated (← links)
- 05000445/LER-1991-024, :on 911004,main Steam Safety Valves Had Lift Setpoints Less than Setpoint Tolerance Allowed by Ts.Caused by Inadequate Procedure.Setpoint Verification Procedure Revised (← links)
- 05000445/LER-1991-019, :on 910609,power from Preferred Offsite 345 Kv Transmission Line Momentarily Lost.Caused by Lightning Strike.Design Mod Made to Switchyard to Enhance Reliability of Offsite Power Sources (← links)
- 05000445/LER-1991-018, :on 910528,determined That Train a Safety Chiller May Have Been Inoperable Between Oct 1989 to Apr 1991.On 891011,oil Sump Level Switch Closed Incorrectly on High Sump Level.Caused by Mfg Defect (← links)
- 05000445/LER-1991-007, :on 910315 & 27,incorrect Acceptance Criteria Used in Section XI Testing Requirements for Check Valves in Auxiliary Feedwater Sys.Caused by Inadequate Technical Review.Procedures Revised (← links)
- 05000445/LER-1991-017, :on 910429,discovered That Scheduling of TS Surveillance Testing of Containment Hydrogen Monitors Had Not Satisfied Staggered Test Basis Requirement.Caused by Personnel Error.Personnel Trained (← links)
- 05000445/LER-1991-015, :on 910416,control Room HVAC Sys Realigned to Emergency Recirculation Mode Due to High Radiation Signal from Radiation Monitor (XRE-5895A).Cause Unknown.Procedure Will Be Revised (← links)
- 05000445/LER-1991-014, :on 910413 & 15,inadvertent Auxiliary Feedwater Sys Actuations Occurred.Caused by Inadequate Procedure & Mode Selector Switch Design.Procedures Revised to Be More Compatible W/Switch Design (← links)
- 05000445/LER-1994-005-01, :on 940831,discovered That TS Surveillances Were Not Performed on Unit 1 for Transmitters.Caused by Instrument Loops Not Performing Same Function.Sensor Response Time Testing Has Been Corrected (← links)
- 05000445/LER-1991-013, :on 910328,loss of Offsite Power Occurred. Caused by Grounded Transmission Line Due to Accumulation of Bird Droppings on Insulators.Increased Attention Given to Need for Cleaning (← links)
- 05000445/LER-1994-004-01, :on 940822,unit 1 Load Reduction QPTR Exceeded TS 3/4.2.4 Limits of 1.02.Caused by QPTR Was Inoperable. Plant Computer Database Was Corrected to Resolve QPTR Annunciator Problem (← links)
- 05000445/LER-1991-009, :on 910321,automatic Isolation of Steam Generator Blowdown Occurred.Caused by Cognitive Personnel Error & Inadequate Procedural Guidance.Operations Shift Crew Counselled & Procedure Revised (← links)
- 05000445/LER-1991-011, :on 910322,oversight in Preparation of Temporary Mod Resulted in Failure to Meet Tech Spec Requirement.Caused by Personnel Error.Procedure Enhancement & Event Review Performed (← links)
- 05000445/LER-1991-008, :on 910317,reactor Tripped While Doing Solid State Protection Sys,Train a Actuation Logic Test.Caused by Personnel Error.Operators Briefed on Self Verification techniques.W/9104116 Ltr (← links)
- 05000445/LER-1991-005, :on 910215,inadvertent Automatic Start of Turbine Driven Auxiliary Feedwater Pump Occurred.Caused by Personnel Error.Performance & Test Personnel Trained Re Event & Causes (← links)
- 05000445/LER-1991-003-01, Advises That LER 91-003-01 Re Less than Adequate Procedure Review Leading to Failure to Fully Satisfy ASME Section XI Testing Requirements Delayed from 910329 to 0429 (← links)
- 05000445/LER-1991-002, :on 910123,level in Primary Water Tank Decreased.Caused by Incorrect Head Tank Low Alarm Setpoint & Inadequate Review of Procedure Change.Investigation Initiated & Operating Procedure Corrected (← links)
- 05000445/LER-1994-003-01, :on 900608,12 & 1105,less than Adequate Procedures Led to Deficient Surveillances of Unit 1 Power Operated Relief Valves Occurred.Procedures Revised (← links)
- 05000445/LER-1994-002-01, :on 940510,control Room Missile Shield Door Was Declared Inoperable.Caused by Broken Missile Shield Door Latching Mechanism.Door Was Repaired & Control Room HVAC System Was Restored to Operable Status (← links)
- 05000445/LER-1991-001, :on 910103,control Room Air Conditioning ESF Inadvertently Actuated When Current Surge Exceeded Capacity of Power Supply Output Fuse.Caused by Equipment Sensitivity. Bulb Replacement Training Held (← links)
- 05000445/LER-1990-044, :on 901130,reactor Operator Performed Test on Wrong Train of Charging Sys Due to Procedural Inadequacy. Results for Previously Performed Tests & Enhancements of Test Info on Work Orders Reviewed (← links)
- 05000445/LER-1990-043, :on 901117,post-accident Sampling Sys Declared Inoperable Due to Failure of Valve to Remain Closed.On 901119,discovered That Valve Stroke Tested W/O Upstream Valve Deactivated.Caused by Personnel Error (← links)
- 05000445/LER-1990-042, :on 901120,ESF Actuation Circuitry Disabled. Caused by Personnel Error in Review of Tech Spec Requirements (← links)
- 05000445/LER-1990-041, :on 901119,protection Set Inverter IV1PC3 Not Operable within 24 H of Trip.Cause of Trip Attributed to Ac Voltage Transients,Inadequate Termination on Loose Wire & Failure to Identify Damaged Components (← links)
- 05000445/LER-1990-038, :on 901105,gas Channel Alarm Initiated Containment Ventilation Isolation (← links)
- 05000445/LER-1990-039, :on 901030,inadequate Design Implementation Led to Potential for Overpressurization of Containment (← links)
- 05000445/LER-1990-033, :on 900926,personnel Error Lead to Momentary Loss of Containment Integrity (← links)
- 05000445/LER-1990-027, :on 900907,manual Reactor Trip Due to Shearing of Feedwater Flow Control Valve Feedback Linkage Arm.W/ (← links)
- 05000445/LER-1990-028, :on 900908,automatic Reactor Trip Occurred Due to Lightning Strike (← links)
- 05000445/LER-1990-029, :on 900910,turbine/reactor Trip Caused by Failure of Personnel to Assure Availability of Drain Path. Operators Responded to Trip Per EOP & Stabilized Plant in Mode 3 (← links)
- 05000445/LER-1994-001-01, :on 940201,low Flow Condition on Primary Water to Main Generator Stator Caused Turbine/Reactor Trip.Caused by Spurious Signal.Key Points Monitored for Power Supply & Instrument Signal Stability (← links)
- 05000445/LER-1993-011-01, :on 931224,reactor Tripped Due to Personnel Error During Main Turbine EHC Sys Trouble Shooting.I&C Technicians Reveiwed Event & Surrounding Issues & Formal Training Being Revised (← links)
- 05000445/LER-1993-009-01, :on 931026,while Transferring Seal Supply from Svc Air to Nitrogen Supply,Lift Gate Seal Deflated.Caused by Decrease in Seal Pressure During Transfer of Pressure Supply from Svc Air Sys.Mgt Restricted (← links)
- 05000445/LER-1990-032, :on 900919,proper Identification of Design Bases Resulted in Operation/Testing of Containment Personnel Airlock Hydraulic Sys Inconsistent W/Existing Design.W/ (← links)
- 05000445/LER-1990-031, :on 901017,containment Atmosphere Gaseous Radioactivity Monitoring Sys Declared Inoperable Due to Nonconservative Alarm Setpoints (← links)
- 05000445/LER-1990-025, :on 900825,reactor Trip Occurred.Caused by Feedwater Flow Control Valve Linkage Arm from Valve Stem to Valve Positioner Separating Due to Flow Induced Oscillations.Lock Washer Installed on Arm (← links)
- 05000445/LER-1990-022, :on 900807,realized That Pressurizer Heatup Limit Exceeded Due to Failure to Comply W/Tech Spec Action Statement Following 900726 & 30 Events.Caused by Inadequate post-trip Review.Procedures & Training Revised (← links)
- 05000445/LER-1990-023, :on 900808,reactor Tripped on Loss of Feedwater Flow.Caused by Loose Fuse in Main Feedwater Control Power Circuit.Corrective Maint Performed on Malfunctioning Fuse Clip (← links)
- 05000445/LER-1990-021, :on 900730,safety Injection Actuation Occurred from Rate Compensated Low Steam Line Pressure Actuation Logic.Caused by Accumulation of Water in Main Steam Line. Procedures Will Be Enhanced & Revised (← links)
- 05000445/LER-1990-020, :on 900726,safety Injection Actuation Occurred. Caused by Sequencing Error While Hanging Clearance on Msivs. Corrective Actions Include Program Enhancements & Training (← links)
- 05000445/LER-1990-019, :on 900726,source Range Flux Doubling Actuation Occurred Due to Spurious Source Range Signal Decrease.Cause Not Identified.Operation & Troubleshooting of Channel SR N32 Observed Indicating Correct Functioning (← links)
- 05000445/LER-1993-008, :on 930920,ASME Section XI Surveillance Missed Due to Less than Adequate Review of Work Documents.Performed Required Surveillance & Reinforced Expectations W/Cognizant Individuals (← links)
- 05000445/LER-1990-034, :on 900928,surveillance Missed for Channel Response Time Due to Personnel Error (← links)
- 05000445/LER-1990-030, :on 900915,reactor Trip Occurred Due to Improper Routing of Heater Drain Pump Cable Shield Ground Lead (← links)
- 05000445/LER-1993-005, :on 930401,discovered That Quarterly Valve Stroke Time Testing Not Performed for Safety Chilled Water Sys Prior to Violation Date of 930329 Due to Personnel Error.Subj Testing Performed (← links)
- 05000445/LER-1993-007, :on 930626,CR Alarm Received,Indicating Excessive Temp on Reactor Coolant Pump Motor Stator 1-04 & Manual Trip Initiated.Caused by RTD Failure.Rtd Terminations Disconnected & AOP Revised (← links)
- 05000445/LER-1993-006, :on 930426,failure to Satisfy TS Surveillance Requirement for Primary Plant ESF Exhaust Filtration Unit Noted.Caused by Poor Labeling,Specification of Wrong Procedure & Discrepancy in Parts List (← links)
- 05000445/LER-1990-016, :on 900521,engineering Determined That Three Atmospheric Relief Valves Declared Inoperable Resulting in Entry Into Tech Spec Limiting Condition for Operation 3.0.3. Pneumatic Controls Drifted Out of Calibr (← links)
- 05000445/LER-1990-017, :on 900527,main Feedwater Flow Control Valve Failed Closed,Resulting in Reduced Feedwater Flow & Decreasing Steam Generator Water Level.Caused by Failure of Solenoid Valve Coil.Solenoid Coil Replaced (← links)
- 05000445/LER-1990-015, :on 900520,chemistry Sample Special Condition Surveillance Missed.Caused by Procedural Error.Procedures Revised to Provide Appropriate Cautions Re Required Sample (← links)
- 05000445/LER-1990-014, :on 900514,containment Penetration Improperly Isolated While Containment Isolation Valve Made Inoperable for Repairs.Caused by Inadequate Review of Work Order. Supervisor Counseled & Shift Order Issued (← links)
- 05000445/LER-1990-011, :on 900504,Pressure Instrument Root Isolation Valve 1SI-8961 Open When Procedure Indicated Valve Should Be Locked Closed.Caused by Lack of Clear Instructions Re Definition of Physical Work. Valve Locked (← links)
- 05000445/LER-1990-013, :on 900509,while Installing Jumpers Across Feedwater Pump Speed Controllers,Pump Coastdown Occurred, Resulting in Loss of Feedwater Flow & Reactor Trip.Caused by Inadequate Procedure Review.Review Performed (← links)
- 05000445/LER-1990-012, :on 900508,control Room Personnel Failed to Satisfy Time Limit for Completion of Action Required by Tech Specs Re Plant Radiation Monitoring.Caused by Personnel Error.Individual Counseled & Procedure Revised (← links)
- 05000445/LER-1990-010, :on 900428 & 29,2-h Surveillance Interval, Including 25% Extension Allowed by Tech Spec 4.0.2,exceeded. Caused by Personnel Error.Procedure Enhancements Initiated & Personnel Involved Counseled (← links)
- 05000445/LER-1990-009, :on 900421,reactor Trip Occurred Due to Accidental Bumping of Source Range Reactor Trip Reset/Block Previously Bypassed for Power Operation.Order Issued Suspending Cleaning of Control Boards (← links)
- 05000445/LER-1990-008, :on 900416,Train a Diesel Generator Rendered Inoperable Due to Failure to Complete post-work Operability Testing on Starting Air Receiver Check Valve 01. Caused by Inadequate Review.Procedure Revised (← links)
- 05000445/LER-1990-007, :on 900416,ESF Actuation Signal Occurred, Resulting in Train a of Control Room Air Conditioning Sys Shifting to Emergency Recirculation Mode.Caused by Personnel Error.Handswitch Added to Radiation Monitor (← links)
- 05000445/LER-1990-006, :on 900412,P-6 Permissive Signal Received & Source Range Flux Doubling (Srfd) Actuation Occurred.Caused by Inadvertent Reset of Srfd Block.Integrated Plant Operations Procedures Changed (← links)
- 05000445/LER-1993-004, :on 911116 & 920627,liquid Waste Processing Valve 1-7150 Exceeded Alert Criteria of 4 S.Caused by Failure to Adequately Review Test Results & Personnel Error. Personnel Indoctrinated & Test Controls Enhanced (← links)
- 05000445/LER-1993-003, :on 930226,spurious SIS Actuation from Train a Solid State Safeguards Sequencer Occurred.Caused by Failure of Instrument Used During Troubleshooting.Monitoring Device Removed & Sys Card Chassis Replaced (← links)
- 05000445/LER-1992-029, :on 921208,discovered Temporary Power Supply Lost to Panel 1PC1.Caused by Personnel Error.Engineering Will Hold Annual Training in self-verification for All Engineering Personnel (← links)
- 05000445/LER-1992-028, :on 921114 & 15,results of Pull Tests Indicated That 87 Clips in Train a & 40 Clips in Train B Experienced Failure.Caused by Mfg Installation Error.Procedures Revised & All Failed Connections Replaced (← links)
- 05000445/LER-1993-002, :on 930124,spurious Signal from Pressurizer Pressure Channel 2 Resulted in Overtemp Nitrogen 16 Reactor Trip.Caused by Instrument Failure During Surveillance Testing.Failed Component Replaced (← links)
- 05000445/LER-1990-005, :on 900327,discovered That Insp to Ensure No Loose Debris Could Be Transported to Containment Sumps During LOCA Not Performed.Caused by Inadequate Procedural Requirements.Administrative Controls Improved (← links)
- 05000445/LER-1990-004, :on 900312,ESF Actuation Occurred,Resulting in Initiation of Train a Safety Injection W/Flow to Rcs.Caused by Failed Diode on Safeguards Driver Board.Station Procedures Revised (← links)
- 05000445/LER-1990-003, :on 900305,both Source Range Flux Doubling Actuation Signals Not Restored to Normal Configuration from Test Configuration.Caused by Personnel Error Due to Not Recognizing That Block Permissives Illuminated (← links)
- 05000445/LER-1991-004, :on 910210,potential Transformer Drawer Opened at Bottom of Switchgear Bus 1A3 Auxiliary Cubicle,Causing Load Shed Signal & Reactor Trip.Caused by Personnel Error. Labels Attached to Switchgear Bus (← links)
- 05000445/LER-1990-036-01, Forwards Correspondence sign-off Sheet for LER 90-036-01. Suppl Acceptable for Submittal to NRC (← links)
- 05000445/LER-1990-026, :on 900828,surveillance Missed Due to Inadequate Procedural Requirements.Caused by Inadequate Manual Surveillance Scheduling Methods.Station Procedures Revised (← links)
- 05000445/LER-1991-016, :on 910418,failure of Check Valve to Prevent Backflow Discovered.Caused by Mfg Error in Machining Process of Valve Body Casting.Valves Reassembled & Scheduled to Receive Testing (← links)
- 05000445/LER-1991-012, :on 910326,potential Gas Binding of Centrifugal Charging Pumps Due to Voids in Boric Acid Gravity Feed Line Identified.Caused by Hydrogen Coming Out of Solution in Lower Pressure CCP Suction Header (← links)
- 05000445/LER-1990-001, :on 900209,reactor Protection Sys Actuation Occurred Due to Spike on Range Channel.Appropriate Source Range Procedures Revised to Require Insertion of Flux Doubling Signal Block Prior to Withdrawal (← links)
- 05000445/LER-2017-001, Regarding Unanalyzed Condition Involving Teflon Installed in Containment Spray Pump Diaphragm Seal Assemblies (← links)
- 05000445/LER-2016-002, Regarding Unanalyzed Condition Involving Potential Moderate Energy Line Break (← links)
- 05000445/LER-2016-001, Regarding Safety Chiller Inoperable for Longer than Allowed by Technical Specifications (← links)
- 05000445/LER-2015-001, Regarding Unanalyzed Condition During MSSV Testing (← links)
- 05000445/LER-2014-003, Regarding Safety Chiller Inoperable for Longer than Allowed by Technical Specifications (← links)
- 05000445/LER-2014-002, Regarding Non-Compliance with Pressure-Temperature Limits Report During RCS Vacuum Fill (← links)
- 05000445/LER-2014-001, Regarding Automatic Reactor Trip Due to Generator Lockout Relay Trip (← links)
- 05000445/LER-2013-003, Regarding Auto Start of Both Units Auxiliary Feedwater Pumps and Emergency Diesel Generators Due to a Loss of Both Units Safeguards Electrical Power (← links)
- 05000445/LER-2013-002, Regarding Unanalyzed Condition Under 10CFR50 Appendix R, Secondary Fires from Unprotected Ammeter Wiring (← links)
- 05000445/LER-2013-001, Regarding Inoperability of Unit Emergency Airlock Exterior Door (← links)
- 05000445/LER-2012-003, Regarding Manual Reactor Trip Due to Reactor Coolant Pump Low Oil Level (← links)
- 05000445/LER-2012-002, For Comanche Peak, Regarding Failure of Safety Related Breaker Control Devices Due to a Common Cause (← links)
- 05000445/LER-2012-001, For Comanche Peak, Unit 1, Regarding Unanalyzed Condition Discovered for the Normally Open Battery Room Fire and Cable Spread Room Doors Close on Momentary Loss of Power (← links)
- 05000445/LER-2011-003, Regarding Unsuitable Material on Containment Airlock (← links)
- 05000445/LER-2011-002, Regarding Containment Personnel Airlock (Pal) Door Inoperable (← links)
- 05000445/LER-2011-001, For Comanche Peak, Units 1 & 2, Regarding Potential for Steam Voiding Causing Residual Heat Removal System Inoperability (← links)
- 05000445/LER-2010-004, For Comanche Peak Regarding Component Cooling Water Train Inoperable Due to Inadequate Post Work Test Procedure (← links)
- 05000445/LER-2010-003, Regarding Inadequate Surveillance Test Procedure Resulting in Failure to Meet TS Requirements (← links)
- 05000445/LER-2010-001, Loss of XST1 Due to Breakers 7030 and 7040 Opening as a Result of a B-Phase to Ground Fault (← links)
- 05000445/LER-2010-002, Regarding Loss of Automatic Initiation of Auxiliary Feedwater Upon Loss of Main Feedwater (← links)
- 05000445/LER-2007-001, Regarding Emergency Diesel Generator Inoperable for Longer than Allowed by TS Due to Paint on Metering Rod (← links)
- 05000445/LER-2004-003, Regarding Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2004-002, Regarding Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2004-001, (CPSES) Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2003-004, Regarding Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2003-003, For Comanche Peak Unit 1 Reactor Trip on Units 1 & 2 Due to Grid Disturbance (← links)
- 05000445/LER-2003-002, Regarding Actuation of Reactor Protection System (← links)
- 05000445/LER-2003-001, From Comanche Peak, Unit 1 Regarding Condition Prohibited by TS (← links)
- 05000445/LER-2002-004, Re Inoperable Train/Channel in Safety Related System (← links)
- 05000445/LER-2002-003, Unexpected Auto Start of Train B Emergency Diesel Generator (← links)
- 05000445/LER-2002-001, For Comanche Peak Steam Electric Station Unit 1 Regarding Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2002-002, Technical Specification Report for Steam Generator Meeting C-3 Category (← links)
- 05000445/LER-2024-002, (Cpnpp), Unit 1, Condition Prohibited by Technical Specifications Due to Inoperable Remote Shutdown System Functions (← links)
- ML041260217 (redirect page) (← links)
- ML12236A332 (← links)
- 05000446/LER-2004-003, Regarding Containment Pressure Channel Inoperable Due to a Secondary Ground (← links)
- 05000446/LER-2004-002, For Comanche Peak, Unit 2 Re Actuation of Specified System: Emergency Diesel Generator and Turbine Driven Auxiliary Feedwater Pump (← links)
- 05000445/LER-2004-003, Regarding Condition Prohibited by Technical Specifications (← links)
- 05000445/LER-2004-002, Regarding Condition Prohibited by Technical Specifications (← links)
- 05000446/LER-2004-001, Regarding Refueling Water Storage Tank Level Channel Inoperable (← links)