Pages that link to "05000219/LER-2009-001, Automatic Reactor Shutdown Caused by Main Transformer Failure"
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The following pages link to 05000219/LER-2009-001, Automatic Reactor Shutdown Caused by Main Transformer Failure:
Displayed 10 items.
- 05000219/LER-2009-001 (redirect page) (← links)
- 05000219/LER-2014-005, Secondary Containment Declared Inoperable (← links)
- 05000219/LER-2014-002 (← links)
- IR 05000219/2009002 (← links)
- 05000219/LER-1982-033, Forwards LER 82-033/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-036, Forwards LER 82-036/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-018, Forwards LER 82-018/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-031, Forwards LER 82-031/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-032, Forwards LER 82-032/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-030, Forwards LER 82-030/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-025, Forwards LER 82-025/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-028, Forwards LER 82-028/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-027, Forwards LER 82-027/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-029, Forwards LER 82-029/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-015, Forwards LER 82-015/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-023, Forwards LER 82-023/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1978-026, Forwards LER 78-026/01T-0 (← links)
- 05000219/LER-1982-057, Forwards LER 82-057/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1978-017, Forwards LER 78-017/03L-0 (← links)
- 05000219/LER-1982-050, Forwards LER 82-050/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-048, Forwards LER 82-048/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-049, Forwards LER 82-049/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-044, Forwards LER 82-044/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-042, Forwards LER 82-042/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-037, Forwards LER 82-037/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-016, Forwards LER 82-016/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-035, Forwards LER 82-035/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-040, Forwards LER 82-040/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-034, Forwards LER 82-034/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-041, Forwards LER 82-041/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-003, Forwards LER 83-003/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-052, Forwards LER 82-052/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-054, Forwards LER 82-054/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-051, Forwards LER 82-051/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-009, Forwards LER 83-009/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-002, Forwards LER 83-002/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-005, Forwards LER 83-005/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-056, Forwards LER 82-056/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-043, Forwards LER 82-043/03L-0.Detailed Analysis Encl (← links)
- 05000219/LER-1982-045, Forwards LER 82-045/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-047, Forwards LER 82-047/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1989-025, Responds to 901002 Safety Evaluation Re 891216 Event Involving Two Control Rods Moving at Same Time Reported Via LER 89-025.Mod to Reduce Probability of Simultaneous Control Rod Withdrawal Will Be Installed in 13R Refueling Out (← links)
- 05000219/LER-1982-060, Forwards LER 82-060/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-014, Forwards LER 83-014/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-008, Forwards LER 83-008/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-013, Forwards LER 83-013/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-012, Forwards LER 83-012/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-010, Forwards LER 83-010/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-011, Forwards LER 83-011/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-019, Forwards LER 82-019-/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1983-001, Forwards LER 83-001/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1998-012, Forwards LER 98-012-00 Re Actuation of ESF by Test Instrument,Due to Inadequate Procedure.Event Did Not Impact Health & Safety of Public (← links)
- 05000219/LER-1997-004, Adds Oyster Creek Nuclear Generating Station Rwcs Valve V-16-2 to Scope of GL 89-10,suppl 3 Valves IAW Corrective Actions Identified in LER 97-04,dtd 970425.Description Design Basis Conditions Established for RWCU Valve,Encl (← links)
- 05000219/LER-1982-039, Forwards Updated LER 82-039/03X-1.Detailed Event Analysis Encl (← links)
- 05000219/LER-1987-030, Forwards Rev 1 to LER 87-030.Event Date Incorrectly Reported in Two Places on LER Due to Administrative Oversight (← links)
- 05000219/LER-2022-001, Compensatory Measures Not Implemented Per Sites Physical Security Plan Due to Multiplexer (Mux) Power Supply Failure (← links)
- 05000219/LER-1989-008, :on 890303,prevention of Secondary Containment Isolation from Loss of Air Event Identified.Caused by Inadequate Surveillance Testing of Air Support Sys.Formal Surveillance Program Will Be Developed (← links)
- 05000219/LER-1998-009, :on 980501,fire Program Requiring Testing Was Missed.Caused by Inadequately Transferring Test Requirements Into Procedures.B HVAC Sys Was Returned to Service on 980502 W/Fire Watch Posted as Required (← links)
- 05000219/LER-1989-007, :on 890306,secondary Containment Isolation & Standby Gas Treatment Sys Initiation Occurred Due to Electrical Ribbon Connection Disengaging from Socket.Caused by Equipment Failure.Mod Considered (← links)
- 05000219/LER-1989-004, :on 890222,MSIV Automatic Closure Signal Occurred During Transfer of Reactor Protection Sys Power Supply.Caused by Procedural Inadequacy.Immediate Actions Taken to Open Valves & Revise Procedure (← links)
- 05000219/LER-1989-011, :on 890422,equipment Operator Failed to Properly Align Seal Water Makeup Supply.Caused by Oversight by Operator.Procedures in Hand Requirement Shall Apply to Evolution (← links)
- 05000219/LER-1989-016, :on 890625,main Generator Tripped Due to Phase Differential Condition Caused by Fault of Main Output Transformer.Caused by Equipment Failure.Failed Transformer Removed & Spare Installed (← links)
- 05000219/LER-1998-008, :on 980409,building Dp Was Found to Be Out of Design Requirements.Caused by Lack of Awareness.Operations Dept Tour Logs Were Revised to Require Orw Dp Readings to Be Taken Once Per Shift (← links)
- 05000219/LER-1989-006, :on 890224,Tech Spec Inconsistency Resulted in Violation of Min Number of Channels Required for Automatic Depressurization & Core Spray Sys.Caused by Lack of Correlation for Both Sys.Procedure Revised (← links)
- 05000219/LER-1989-005, :on 890217,standby Gas Treatment Sys & Partial Primary Containment Isolation Initiated During Time Tests. Caused by Fact That Sys Not Designed to Facilitate Testing. Blown Fuse Replaced & Isolation Signal Reset (← links)
- 05000219/LER-1998-005, :on 980330,automatic Depressurization Sys Inoperable.Caused by Inadequate Design.Mods Performed to Install Addl Cables,Prior to Plant Start Up (← links)
- 05000219/LER-1998-006, :on 980330,noted That Five of SDC Supports Do Not Satisfy Seismic Design Criteria.Caused by Computer Modeling Error.Will Design & Install Modifications to Pipe Support Sys to Bring Supports to Compliance (← links)
- 05000219/LER-1989-018, :on 890729,loose Wire Found in High Pressure Actuation Circuit for Electromatic Relief Valve D. Possibly Caused While Performing Surveillance on 890628. Proper Connection for Wire Verified (← links)
- 05000219/LER-1988-022, :on 881002,power to 4,160 Volt Bus 1D Was Lost When Breaker 1D Tripped & Locked Out Due to Ground Fault. Caused by Isolated Defect in Cable Insulation.Cable Replaced (← links)
- 05000219/LER-1989-010, :on 890316,discovered That Failure of Power or Control Cables for Ac Powered Valves,After Spurious Closure, Could Prevent Reopening of Isolation Condenser Valves.Caused by Design Defect.Fuse Added to Circuitry (← links)
- 05000219/LER-1988-032, Has Been Canceled.Resolution of LERs Missing from Lertrk/Scss/Dcs Discussed (← links)
- 05000219/LER-1988-025, Has Been Canceled.Resolution of LERs Missing from Lertrk/Scss/Dcs Discussed (← links)
- 05000219/LER-1989-015, :on 890518,reactor Automatically Shut Down Due to Trip of Main Turbine Generator.Caused by Personnel Error. Administrative Controls Implemented & Operators Briefed on Need to Use All Available Indications (← links)
- 05000219/LER-1989-009, :on 890321,potential Loss of Adequate Containment Cooling During LOCA Noted.Caused by Unrecognized Sys Design Deficiency.Containment Spray Sys Automatic Trip Setpoint Adjusted & Procedures Changed (← links)
- 05000219/LER-1989-017, :on 890711,main Generator Tripped Due to Phase Differential Condition Caused by Fault in Operating Main Output Transformer.Caused by Equipment Failure.Spare Transformer Installed (← links)
- 05000219/LER-1989-012, :on 890520,reactor Mode Switch Mispositioned to Refuel Position Resulting in Reactor Scram While Removing Key from Switch Lock.Caused by Binding in Reactor Mode Switch Key Lock.Scram Reset (← links)
- 05000219/LER-1989-014, :on 890515,reactor Coolant Sample Not Taken & Analyzed for Dose Equivalent I-131 Activity Following Reactor Power Change of Greater than 15% as Required by Tech Specs.Caused by Personnel Error (← links)
- 05000219/LER-1989-013, :on 890508,reactor Plant Shutdown & Cooldown Conducted Due to Inoperability of B Isolation Condenser. Caused by Component Failure.Torque Switch V-14-35 Replaced. Valves Satisfactorily Tested for Operability (← links)
- 05000219/LER-1987-028, :on 870802,MSIV Closure Inadvertently Initiated During Intermediate Range Neutron Monitor Front Panel Surveillance.Caused by Circuit Not Configured to Facilitate Testing.Blown Fuse Replaced & Valve Reset (← links)
- 05000219/LER-1987-029, :on 870730,high Reactor Pressure Scram Occurred Due to Air Leak from Air Test Pilot.Caused by Incorrect Mounting Cap Screws.Msiv Air Pilot Valves All Remounted W/ Vendor Approved Mounting Cap Screws (← links)
- 05000219/LER-1986-034, :on 861229,reactor Manually Scrammed Due to Inability to Maintain Condenser Vacuum.Caused by Equipment Failure & Cooldown in Excess of Tech Spec Limit.Failed Relief Valve & Expansion Joint Replaced (← links)
- 05000219/LER-1987-027, :on 870730 & 31,containment Isolation & Standby Gas Treatment Sys Initiation Occurred Due to Automatic Electrical Bus Transfer.Caused by Lightning Strike.Power Supply Will Be Changed to Continuous Source (← links)
- 05000219/LER-1998-010, :on 980724,DG Switchgear Was Found Beyond Design Bases.Caused by Inadequate Installation During Original Construction.Evaluated Temporary Mod to Determine If It Should Be Reclassified as Permanent Mod (← links)
- 05000219/LER-1987-047, :on 871115,reactor Scram Occurred While Moving Reactor Mode Switch for Testing.Apparently Caused by Mechanical Wear of Mode Switch.Mode Switch Replacement in Future Refueling Outage Will Be Evaluated (← links)
- 05000219/LER-1987-044, :on 871030,emergency Diesel Generator 2 & Main Station Battery Out of Svc.Caused by Personnel Error. Procedure Revised (← links)
- 05000219/LER-1987-042, :on 871026,potential Inoperability of Standby Gas Treatment Sys Identified in That Plant Drywell Purge Supply Valves Not Closing on Reactor Bldg Isolation Signal. Caused by Design Deficiency.Mod Installed (← links)
- 05000219/LER-1987-006, :on 870121,discovered That GE Reload Fuel Bundles Temporarily Stored in Fuel Pool During 1986 11R Outage.Caused by Personnel Error.Tech Specs Will Be Revised to Raise Enrichment Limits on Stored Fuel (← links)
- 05000219/LER-1987-036, :on 871013,four Workers Entered Locked High Radiation Area W/O Min Radiation Monitoring Equipment Required by Procedure & Station Tech Specs.Caused by Personnel Error & Procedural Noncompliance (← links)
- 05000219/LER-1987-040, :on 871016,torus Oxygen Sample Line Isolation Valves Logic Determined Not to Meet Single Failure Criteria, Per NRC Gdc.Caused by Design Deficiency.Mod to Valves Will Be Made & Standing Order & Procedure Issued (← links)
- 05000219/LER-1987-039, :on 871014,discovered That Signal Circuit from Lockout Relay Not in Compliance W/App R.Caused by Design Deficiency.Action Taken to Modify Circuitry at Relay 861D-X to Comply w/10CFR50,App R Criteria (← links)
- 05000219/LER-1987-037, :on 871009,monthly Calculations of Dose Due to Radioiodine & Particulates in Gaseous Effluents Not Performed for Jul & Aug 1987.Caused by Personnel Error Due to Inadequate Training.Calculations Completed (← links)
- 05000219/LER-1989-003, :on 890213,inadvertently Reactor Isolation Signal Initiated.Caused by Failed Fuse in Reactor Protection Sys Channel 2.Failure Attributed to Human Engineering Design Deficiency.Isolation Signal Reset (← links)
- 05000219/LER-1987-034, :on 870916,emergency Lighting in Battery Room A/B & Access Route Inadequate.Caused by Design Deficiency. Mods Providing Required Lighting Capability Completed.W/ (← links)
- 05000219/LER-1987-035, :on 870924,w/reactor Shut Down,Reactor Full Scram Signal Occurred.Caused by Degraded Shield Connection at Cable Connector for Intermediate Range Monitor.Degraded Connection Will Be Repaired & Cable Lengthened (← links)
- 05000219/LER-1987-033, :on 870911,Tech Spec Safety Limit Requiring Two Recirculation Loops to Be Fully Opened Violated.Caused by Personnel Error.Addl Training for Operators Will Be Provided & Procedure Revs in Progress (← links)
- 05000219/LER-1989-002, :on 890114 & 15,possible Fuel Pool Gate (Fpg) Movement Over Irradiated Fuel Occurred.Caused by Failure of Personnel to Monitor Gate Movement.Spent Fuel Relocated to Provide Addl Clearance for Gate Path (← links)
- 05000219/LER-1987-031, :on 870827,personnel Violated High Radiation Area Tech Spec Procedures.Caused by Personnel Error.Training Provided to Personnel on What Constitutes Emergency Allowing Immediate Access to High Radiation Area (← links)
- 05000219/LER-1987-032, :on 870824,augmented Offgas Sys H2 Analyzer Not Calibr,Per Tech Spec.Caused by Personnel Error.Ler Will Be Required Reading for All Involved Depts to Stress Importance of Thorough Review of Plant Procedures (← links)
- 05000219/LER-1998-002-01, :on 980227,480 V Switchgear Room Fire Barrier Deficiency Was Noted.Caused by Inadequate Fire Barrier Spec. Two of Seven Fire Zones Where Conduit Fire Barriers Are Installed Were Reviewed,No Deficiencies Found (← links)
- 05000219/LER-1998-003-01, :on 980303,failure to Perform High Drywell Pressure Check Surveillance Was Noted.Caused by Inadequate Procedure.Reviewed & Revised Appropriate Plant Documents & Provided Operator Training (← links)
- 05000219/LER-1998-004-01, :on 980320,manual Reactor Scram Was Required. Caused by Failure of Supply Air Solenoid Valves Associated W/Sjae Steam Supply Regulating Valves.Stabilized Reactor Plant & Placed in Cold Shutdown (← links)
- 05000219/LER-1998-001-01, :on 980216,core Spray/Automatic Depressurization Sys Contacts Were Not Tested by Procedure. Caused by Inadequate Testing Procedures.Required Contact Verifications & Testing Was Completed (← links)
- 05000219/LER-1998-011-02, Forwards LER 98-011-02, Three Small Bore Pipe Lines Did Not Meet Design Bases for Siesmic & Thermal Allowables. Engineering Std Will Not Be Completed Until End of 4th Quarter of 1999 Due to Scheduling Conflicts (← links)
- 05000219/LER-1997-010, :on 970801,manual Reactor Scram,Esfa & Design Deficiencies Identified as Result of Generator Exciter Pm. Caused by Use of Incorrect Parts.Exciter Brushes Were Changed (← links)
- 05000219/LER-1987-020, :on 870402,daily 5% MSIV Closure Test Not Performed within Time Frame Per Tech Specs.Caused by Personnel Error During Shift Turnover.Test Completed & Shift Supervisor Counseled.Further Training Planned (← links)
- 05000219/LER-1986-024, :on 860911,loads Calculated for Primary Containment Piping Penetrations Determined to Exceed Limits. Caused by Postulated high-energy Line Break.Mod to Limit Penetration Stress Levels Planned (← links)
- 05000219/LER-1986-025, :on 860914,4,160-volt Electrical Bus Grounded,Resulting in Actuation of Several Esfs.Caused by Technician Error.Technicians Will Receive Addl Training in Installation & Use of Ground Breakers (← links)
- 05000219/LER-1987-016, :on 870304,setpoints for Three of Eight Isolation Condenser Pipe Break Sensors Found Beyond Max Allowable Tech Spec Limits.Caused Undetermined.Sensors Recalibr.Engineering Evaluation Initiated (← links)
- 05000219/LER-1987-025, :on 870507,4 of 10 Primary Containment Vent & Purge Valves Found to Have Max Opening Stroke Greater than 30 Degrees.Caused by Procedural Inadequacy.Instructions Will Be Written Re New Valve Measuring Method (← links)
- 05000219/LER-1987-024, :on 870426,fire Watch for Nonfunctional Fire Barrier Not Posted.Caused by Personnel Error in Failing to Follow Procedure.Fire Watch Posted & Personnel Counseled (← links)
- 05000219/LER-1987-026, :on 870509,discovered That Six Temporary Variations Associated W/Plant Sys Did Not Receive Adequate Safety Review Prior to Installation.Caused by Inadequate Safety Reviews.Temporary Variations Revoked (← links)
- 05000219/LER-1986-023, :on 861030,single Failure of Either 125-V Dc Panel D or F Rendered Automatic Initiation of Both Spray Containment Sys Inoperable.Caused by Design Error.Amend Will Be Submitted to Remove Automatic Start Feature (← links)
- 05000219/LER-1987-023, :on 870430,while Performing Surveillance Testing of Reactor Protection Motor Generator Sets,Partial Primary Containment Isolation Occurred.Caused by Procedural Inadequacy.Procedures Reviewed & Revised (← links)
- 05000219/LER-1987-021, :on 870424,during Shutdown Process for Maint, Two Vacuum Breakers Blocked Open to Assist Containment Deinerting Torus,Violating Tech Spec Requirements.Caused by Personnel Error.Personnel Retrained (← links)
- 05000219/LER-1987-019, :on 870330,limiting Safety Sys Setpoint for Total Recirculation Flow Exceeded Tech Specs.Caused by Personnel Error.Surveillance Procedure Revised to Specify Use of More Accurate Flowmeter (← links)
- 05000219/LER-1985-005-02, :on 850210,during Routine Surveillance Testing, Isolation Condenser Pipe Break Sensors IB05A1,IB05B1,IB11A1, IB11B1 & IB11B2 Tripped at Values Greater than Tech Specs. Caused by Instrument Drift.Sensors Reset (← links)
- 05000219/LER-1987-022, :on 870424,plant Shut Down Because of Inoperable Electromatic Relief Valve Position Indicator. Caused by Cable Damage During Installation Phase Due to Marginal Splice Design.Failed Splice Replaced (← links)
- 05000219/LER-1986-002-02, :on 860124,safety-related Hydraulic Snubber Disconnected from Containment Spray Piping Rendering Snubber Inoperable.Caused by Personnel Error.Snubber Reconnected (← links)
- 05000219/LER-1986-026, :on 861011,reactor Vessel Low Water Level Scram Occurred During Excess Flow Check Valve Testing.Caused by Inadequate Administrative Controls.Administrative Controls Will Be Revised (← links)
- 05000219/LER-1986-033, :on 861221,reactor Bldg Ventilation Isolated & Standby Gas Treatment Sys Initiated When Area Radiation Monitor Trip Unit Inadvertently Grounded During Maint.Caused by Personnel Error.Pinched Cable Replaced (← links)
- 05000219/LER-1986-032, :on 861224,reactor Trip Occurred Due to High Neutron Flux Condition.Caused by Personnel Error & Configuration W/Respect to Feedwater Control Sys.Event Reviewed W/Each Oncoming Shift (← links)
- 05000219/LER-1987-007, :on 861231,processed Water Released to Environ W/Radwaste Liquid Monitors Inoperable & on 870130,discovered That Tech Spec Limiting Conditions for Discharging Overboard Not Satisfied.Caused by Technician Error (← links)
- 05000219/LER-1987-008, :on 870202,reactor Recirculation Flow Converter Scram Setpoint Found to Be Above Limiting Safety Sys Setpoint Listed in Tech Specs.Caused by Instrument Drift. Flow Converter Scram Setpoint Adjusted (← links)
- 05000219/LER-1987-005, :on 870116,high Flux Reactor Scram Occurred Due to Increased Recirculation Flow.Caused by Starting of Pump W/Discharge Valve Partially Open.Second Scram Occurred Due to Calibr Error.Valves Readjusted (← links)
- 05000219/LER-1997-012, :on 970916,setpoint Was Found to Be non-conservative.Caused by Failure to Include Possible Uncertainties.Appropriate Procedures Were Revised to Reflect New Setpoint Based on SE (← links)
- 05000219/LER-1986-028, :on 861110,reactor lo-lo Water Level Initiation Signals Discovered Jumpered Out Since 861103 & Reactor Bldg Ventilation Not Secured.Caused by Personnel Error.Equipment Control Procedure Will Be Revised (← links)
- 05000219/LER-1986-010-01, :on 860513,while in Cold Shutdown,Hydraulic Snubbers NE-1-S4,NE-1-S5 & NE-2-S13 Found to Have Associated Pipe Clamp to Shear Lug Welds Missing.Caused by Personnel Error Due to Inadequate Vendor Followup (← links)
- 05000219/LER-1997-007-01, :on 970531,DG 2 Was Inadvertently Initiated During Surveillance Testing.Caused by Personnel Error.Formal Written Expectations for Key CR Activities Were Developed & Reviewed (← links)
- 05000219/LER-1987-004, :on 870112,emergency Svc Water Pump D Tagged Out of Svc for Corrective Maint While Emergency Diesel Generator 1 Inoperable for Surveillance Contrary to Tech Spec.Caused by Personnel Error (← links)
- 05000219/LER-1997-011, :on 970815,determined Certain Isolation Relay Contacts Were Not Functionally Tested as Required by Tss. Caused by Inadequate Testing Procedure.Revised Procedure to Incorporate Required Contact Testing (← links)
- 05000219/LER-1987-003, :on 870107,reactor Bldg Ventilation Sys Isolated & Standby Gas Treatment Sys Initiated Due to Power Supply Perturbation.Caused by Nicked Area Radiation Monitor Cables.Cables Repaired & New Cables Ordered (← links)
- 05000219/LER-1997-009, :on 970709,trip Setpoints of Monitors Which Initiate Reactor Bldg Ventilation Isolation & Start Standby Gas Treatment Sys Inappropriately Adjusted.Caused by Personnel Error.Reactor Bldg Reset (← links)
- 05000219/LER-1986-022, :on 860828,80 of 137 CRD Hydraulic Control Units Not Installed Per Design.Caused by Installation Field Change Not Analyzed for Seismic Qualification During Original Plant Const (← links)
- 05000219/LER-1999-001, :on 990208,prolonged Operation of TB with Condenser & Heater Bay Pressure Less than Design Was Noted. Caused by Lack of Clearly Documented Design Description. Placed Alternate Exhaust Fan in Service.With (← links)
- 05000219/LER-1987-002, :on 870106,MSIV Isolation Occurred During Startup.Caused by Operator Failure to Maintain Awareness of Status of Nuclear Instrumentation & Ranging Into Range 10 W/ Reactor Pressure Less than 825 Psig (← links)
- 05000219/LER-1987-001, :on 870102,discovered That No Clamp Circuit Exists in APRM Rod Block Circuitry to Limit Recirculation Flow Setpoint to 108%.Caused by Inconsistency Between Tech Specs & Installed Hardware (← links)
- 05000219/LER-1986-018, :on 860807,secondary Containment Leak Rate Test Failed to Meet Acceptance Criteria.Caused by Missing Cap on Svc Water Overboard Line in Seal Well.Cap Replaced & Test Successfully Completed (← links)
- 05000219/LER-1986-020, :on 860811,during Insp of Discs in Control Rod Hydraulic Control Unit (HCU) Manual Inlet & Outlet Isolation Valves,Valve V-102 for HCU 18-15 Found W/One Ear Broken from Wedge on Disc.Disc Replaced (← links)
- 05000219/LER-1986-019, :on 860809,standby Gas Treatment Sys Initiated When Electrical Short Occurred Inside Control Room Panel. Caused by Personnel Error When Work Performed on Panel. Blown Fuses Replaced (← links)
- 05000219/LER-1987-015, :on 870218,three Intermediate Range Monitors in Reactor Protection Trip Sys Discovered Inoperable.Caused by Break in Nickel Ribbon Flexible Conductor Attached to Detector Anode.Maint Procedures Revised (← links)
- 05000219/LER-1987-018, :on 870320,reactor Bldg Ventilation Valve V-28-38 Removed from Svc for Maint But Not Secured Closed. Caused by Personnel Error.Operator Training & Guidance for Manual Valve Operation Provided (← links)
- 05000219/LER-1987-013, :on 870316,secondary Containment Isolation & Standby Gas Treatment Sys Initiation Occurred When Electrical Connector Fell Off Instrument Power Supply.Caused by Personnel Error.Cable Plugs Anchored (← links)
- 05000219/LER-1986-031, :on 861218,reactor Bldg Closed Cooling Water Flow to Drywell Isolated on lo-lo-lo Reactor Vessel Water Level Signals Causing Pressure Spike on Instrument Sensing Line.Caused by Personnel Error (← links)
- 05000219/LER-1986-030, :on 861210,isolation Condenser a Isolated on High Flow Signal from Condensate Return Line Flow Sensor Due to Pressure Line Leak.Caused by Procedural Deficiency. Procedure Will Be Revised (← links)
- 05000219/LER-1986-029, :on 861206,potential for Inoperability of Core Spray/Emergency Svc Water Pumps Due to Inadequate Design & Procedure Reviews Discovered.Caused by Thermal Overcurrent Relay Actuation Preventing Immediate Restart (← links)
- 05000219/LER-1988-020, :on 880908,isolation Condenser Vent Radiation & Emergency Svc Water Monitors Incapable of Leak Detection. Caused by Design Deficiency Due to Failure to Properly Evaluate Potential Area Radiation Conditions (← links)
- 05000219/LER-1999-001-02, :on 990208,noted Prolonged Operation of TB with Condenser & Heater Bay Pressure.Caused by Loss of Integrity of Ventilation Envelope (Physical Boundaries).Alternate Exhaust Fan Was Placed in Service.With (← links)
- 05000219/LER-1988-014, :on 880721,upstream MSIV in Steam Line a Failed Surveillance Test & Declared Inoperable.Caused by Procedural Inadequacy.Damage to Guide Ribs Repaired & Poppet Properly Aligned W/Guide Ribs.Valve Stem Replaced (← links)
- 05000219/LER-1986-012, :on 860611,during Automatic Electrical Bus Transfer,Primary & Secondary Containment Isolation & Standby Gas Treatment Sys Initiation Occurred.Caused by Electrical Storms.Isolation Signal Reset (← links)
- 05000219/LER-1986-013, :on 860619,secondary Containment Isolation & Initiation of Standby Gas Treatment Sys Occurred.Caused by Failure of Radiation Monitor Power Supply.Failed Power Supply Replaced W/Spare Unit (← links)
- 05000219/LER-1998-016, :on 981028,single DG Start,Occurred.Caused by Loss of One Source of Offsite Power.Generator Relay Surveillance Revised to Eliminate Possibility of Inadvertent Procedural Breaker Trips.With (← links)
- 05000219/LER-1987-017, :on 870311,two Mechanical Snubbers in Core Spray Sys 2 Found to Be Uninspected Since 1980 Installation. Caused by Personnel Error.Snubbers Inspected.Insp Procedure & Piping Isometric Diagram Revised (← links)
- 05000219/LER-1988-029, :on 881024,containment Isolation Valves V-38-9, 10,16,17,22 & 23 Failed to Meet NUREG-0737 Design Criterion. Caused by Personnel Error.Mod of Subj Valves Planned (← links)
- 05000219/LER-1988-027, :on 881022,fire Watch Required by Tech Specs Missed Due to Inadequate Guidance to Temporary Employees. Caused by Inadequate Guidance & Direction Being Provided to Temporary Contractor Employees (← links)
- 05000219/LER-1988-026, :on 881019,reactor Scram Signal Received While Shut Down During Surveillance Testing.Caused by Inadequate Procedure.Procedure Will Be Revised & LER Will Be Made Required Reading for All Qualified Reviewers (← links)
- 05000219/LER-1999-002-01, :on 990330,fire Protection Deluge Sys Isolation Valve Was Found Out of Position.No Root Cause Determined. Technical Assessment Was Performed.With (← links)
- 05000219/LER-1999-003, :on 990402,cable Trays Did Not Meet Separation Criteria.Caused by Inadequate Engineering Review.Fire Watch Was Stationed Immediately Upon Discovery.With (← links)
- 05000219/LER-1987-009, :on 870207,flow Biased APRM Setpoints for Scram & Rod Block Setpoints Exceeded Tech Specs.Caused by Inadequate Maint & Testing of Recirculation Pumps (← links)
- 05000219/LER-1988-024, :on 881005,MSIV Closure Signal Occurred During Intermediate Range Neutron Monitor (IRM) Front Panel Surveillance Test.Caused by Procedural Inadequacy.Irm Bench Calibr Procedure Revised (← links)
- 05000219/LER-1998-015-01, Forwards LER 98-015-01,as Original Submittal on 981028 Inadvertently Indicated That Suppl Would Be Submitted.Suppl Should Not Have Been Required as Only Change Is on Cover Page (← links)
- 05000219/LER-1987-010, :on 870223,during Automatic Electrical Bus Transfer,Primary & Secondary Containment Isolations & Standby Gas Treatment Sys Initiation Occurred.Caused by Transient Due to Heavy Snow Fall (← links)
- 05000219/LER-1987-012, :on 870221,during Maint Activities,Plant Personnel Discovered Air Ejector Offgas Drain Line Isolation Valve Inoperable.Caused by Buildup of Debris in Bonnet Chamber of Valve.Valve Replaced (← links)
- 05000219/LER-1984-021, :on 840825,bolted Fault Occurred When Control Switch Closed Causing Trip of Pump & Flash Which Caused Sufficient Ground Current Flow to Trip Main 4160-volt Bus Breaker 1C.Caused by Personnel Error (← links)
- 05000219/LER-1986-021, :on 860828,six Nuclear safety-related Sys Failed to Satisfy Plant Seismic Design Bases Per IE Bulletins 79-02 & 79-14.Caused by Original Design & Const Deficiencies.Deficiencies Will Be Corrected (← links)
- 05000219/LER-1986-007-01, :on 860327,plant Shutdown Conducted Due to Repeatability/Drift Problems W/Reactor Low Water Level Scram Switches.Cause Unknown.Static O-ring Switches Replaced.W/ (← links)
- 05000219/LER-1986-006-01, :on 860318,during Testing,Isolation Condenser Automatic Actuation Pressure Sensors REI5A,C & D Tripped at Values Exceeding Tech Specs.Caused by Instrument Repeatability.Sensors to Be Replaced (← links)
- 05000219/LER-1986-011-01, :on 860609,spurious Signal Caused Isolation of Secondary Containment & Initiation of Standby Gas Treatment Sys.Caused by Spike in Power Supply of Reactor Bldg Vent Radiation monitors.RN37 Power Supply Replaced (← links)
- 05000219/LER-1986-004-02, :on 860306 at 92% Power & During Surveillance, Position Switch on Stop Valve 1 Spuriously Opened,Causing Anticipatory Turbine Trip Reactor Scram.Reactor Mode Switch Left in Run Mode,Causing MSIVs to Close (← links)
- 05000219/LER-1997-014, :on 971021,discovered That Suppression Pool Bypass Leak Path Existed During Purging & Venting of Primary Containment.Caused by Inadequate Procedure Review.Revised Operating Procedures Re Purge & Vent Valves (← links)
- 05000219/LER-1997-016, :on 971212,monitors May Not Have Operated for Required Time Due to Inadequate Calculation.Increased Low Pressure Limit of Reagent Gases & Ensures That Installed Gas Bottles Had Sufficient Pressure (← links)
- 05000219/LER-1986-009-01, :on 860501,full Scram Signal Received Due to Electronic Noise Induced Spikes on intermediate-range Monitors.Cause Unknown.Investigation Continuing (← links)
- 05000219/LER-1997-015, :on 971204,static Time Delay Units Not Mounted in Conformance W/Seismic Qualification Criteria.Engineering Direction Developed for Correction of Deficiencies (← links)
- 05000219/LER-1998-019, :on 981118,missed TS Required Surveillance Test.Caused by Inadequate Administrative Controls.Revised Related Surveillance Task Descriptions to Provide Improved Ref.With (← links)
- 05000219/LER-1990-014, :on 901008,flow Biased APRM Scram & Rod Block Setpoints Found Higher than Tech Spec Limits (← links)
- 05000219/LER-1986-027, :on 860930,containment Isolated & Standby Gas Treatment Sys Initiated When Radiation Monitor Power Supply Inadvertently Grounded During Surveillance.Caused by Personnel Error.Power Supply Replaced (← links)
- 05000219/LER-1986-005-02, :on 860407,core Spray Sys & Emergency Diesel Generators Automatically Initiated During Surveillance of Reactor Low Water Level Sensors.Caused by Inadequate Procedure.Procedure Revised (← links)
- 05000219/LER-1988-009-01, :on 880602,isolation Condenser Automatic Actuation Pressure Sensors RE15A & RE15C Tripped at Values Greater than Tech Spec 2.3.E.Caused by Inadequate Instrument Repeatability.Pressure Sensors Adjusted (← links)
- 05000219/LER-1986-009, :on 860501,scram Signal Received Due to Electronic Noise Induced Spikes on Nuclear Instrumentation Intermediate Range Monitors (Irms).Caused by Manipulation of IRM Cables During Maint.Procedures Reviewed (← links)
- 05000219/LER-1998-017, :on 981027,discovered That Station Battery Racks Did Not Comply with Seismic Design Basis.Caused by Inadequate Engineering Review.Restored Battery Rack Retainer Plates to Appropriate Configuration.With (← links)
- 05000219/LER-1988-002-01, :on 880128,containment Radiation Monitoring Sys Determined to Be Left out-of-spec from 861119 Until 871109. Caused by Unclear Info for Testing in Vendor Instruction Manual.Monitors Repaired & Retested (← links)
- 05000219/LER-1999-004, :on 990510,determined That Configurations of Two Pipe Supports in Spent Fuel Pool Cooling Sys Do Not Meet Design Requirements for Deadweight Loads.Caused by Inadequate Analysis.Pipes Upgraded.With (← links)
- 05000219/LER-1987-041, :on 871118,fuel Pool Cooling Sys Piping Radiation Shielding Removed Inadvertently Resulting in Unlocked High Radiation Area.Caused by Personnel Error. Shielding Installed to Lower Area Dose Rate (← links)
- 05000219/LER-1998-018, :on 981023,DG 2 Failed to Start from App R Local Shutdown Panel During Functional Test.Caused by Incorrectly Designed Wiring.Incorrect Wiring Was Modified & Demonstrated by Testing to Be Correct.With (← links)
- 05000219/LER-1988-003-01, :on 880520,discovered That Containment Particulate Monitor Sample Line Isolation Valve Control Circuitry Does Not Meet Single Failure Criteria.Caused by Design Deficiency.Direction Provided (← links)
- 05000219/LER-1988-023, :on 880927,drywell Airlock Door Leak Rate Not Tested at Frequency or Test Pressure Required by 10CFR50, App J.Caused by Insufficient Administrative Controls.Tech Spec Change Under Review (← links)
- 05000219/LER-1998-014, :on 980928,noted Failure of Isolation Condenser Tube Bundles.Caused by Thermal Stresses/Tgscc Due to Leaky Valve.Replaced Failed Tubes Bundles & Repaired Condensate Return Valve.With (← links)
- 05000219/LER-1988-019, :on 880902,discovered That Isolation Condenser Vent Line Inboard Manual Isolation Valve a in Closed Position.Caused by Procedural Inadequacy.Valve Opened & Full Sys Lineups Performed (← links)
- 05000219/LER-1998-013-01, :on 980926,LLRT Results Indicated That MSIV NS03B Exceeded TS Leak Rate Limit.Caused by Component Wear. Maint Was Performed on Subject Valve to Restore Seat Integrity & as-left LLRT Was Acceptable.With (← links)
- 05000219/LER-1988-018, :on 880828,isolation Condenser Sys B Actuated During Valve Operability Test When Control Room Operator Inadvertently Opened Wrong Valve.Caused by Lack of Operator Attention.Operator Counseled (← links)
- 05000219/LER-1998-012-01, :on 980916,unplanned Actuation of Esfs Occurred.Caused by Written Communication.Procedure Revised to Include Signature Verifications to Install & Subsequently Remove Ohmmeter (← links)
- 05000219/LER-1988-017, :on 880822,three Control Rod Low Accumulator Pressure Alarms Present for More than 1 H.Caused by Operator Failing to Recharge Accumulators in Accordance W/Procedures. Accumulators Recharged & Operators Counseled (← links)
- 05000219/LER-1988-016, :on 880819,isolation Condenser Automatic Actuation Pressure Sensors RE15A,RE15B,RE15C & RE15D Tripped at Values Greater than Specified in Tech Spec 2.3.E.Caused by Inadequate Instrument Repeatability (← links)
- 05000219/LER-1988-008, :on 880414,reactor Bldg Isolation & Standby Gas Treatment Sys Automatic Initiation Occurred.Caused by Personnel Error.Emergency Operating Procedures Entered for Secondary Containment Control (← links)
- 05000219/LER-1988-007, :on 880412,inadequate Support of Reactor Sample Line Containing Containment Isolation Valve Determined. Caused by Personnel Error.Sample Line Declared Inoperable & Isolated.Addl Supports Designed (← links)
- 05000219/LER-1988-015, :on 880805,reactor Isolation Signal Inadvertently Initiated During Intermediate Range Neutron Monitor Front Panel Surveillance.Caused by Circuit Not Configured to Facilitate Testing.Fuse Replaced (← links)
- 05000219/LER-1986-001-02, :on 860117,three of Four Reactor Low Level Scram Sensors Found Out of Spec During Monthly Surveillance. Caused by Instrument Drift.Setpoints Adjusted within Acceptable Ranges (← links)
- 05000219/LER-1985-026, :on 851218,recirculation Pump Tripped & Discharge Valve Could Not Be Immediately Closed.Caused by Open Torque Switch in Close Circuit of Valve Operator. Abnormal Operating Procedure Revised (← links)
- 05000219/LER-1988-005, :on 880324,discovered That Tagging Error Caused Components of Both Standby Gas Treatment Sys to Be Inoperable.Caused by Personnel Error.Event Reviewed W/All Operations Personnel (← links)
- 05000219/LER-1988-012, :on 880707,discovered That Control Circuitry for Four Electromatic Relief Valves & Two RWCU Sys Valves Did Not Meet 10CFR50,App R Criteria.Caused by Design Deficiency.Fire Watch Posted (← links)
- 05000219/LER-1988-006, :on 880325,four Isolation Condenser Pipe Break Sensors Tripped.Caused by Past Mod & Switch Problems. Switches Adjusted within Tech Spec Limits & Four Reactor Protection Sys Digital Sensors to Be Replaced (← links)
- 05000219/LER-1997-008-01, :on 970627,determined That Intermediate Range Monitor Sys Contacts in Reactor Protection Were Not Tested by Procedure.Caused by Inadequate Testing Procedures. Revised Sp 620.4.005 (← links)
- 05000219/LER-1988-011, :on 880622,containment Spray Inappropriately Returned to Svc Due to Improperly Performed Surveillance Test.Caused by Instrument Line Configuration Being Complexed & Inadequately Labeled (← links)
- 05000219/LER-1988-010, :on 880601,standby Gas Treatment Sys Manually Initiated Due to Rising Radiation Levels.Caused by Personnel Error.Personnel Counselled,Operating Procedure Rev Completed & Min Sump Level Raised to Increase Pressure (← links)
- 05000219/LER-1976-029-01, /01P-0:on 761220,testing Results Indicated That Certain Relief Valve Opening Sequences Could Result in Unacceptably High Stresses on Torus.Caused by Design Deficiency.Steam Vent Clearing Phenomena Not Considered (← links)
- 05000219/LER-1977-003-01, /01T-0:on 770317,stack Gas Sample Pump B Tripped. Caused by Locking Tabs on Shaft Nut Retaining Washer Not Being Bent to Locking Position During Pump Assembly (← links)
- 05000219/LER-1977-005-03, /03L-0:on 770323,core Spray Sys 1 Parallel Isolation Valve V-20-15 Became Inoperable in Open Position When Valve Motor Operator Breaker Tripped.Cause Unknown. Surveillance Testing Increased to Determine Actual Cause (← links)
- 05000219/LER-1977-013-01, /01T-0:on 770610,dimensional Measurements Taken on Irradiated Fuel Channels Indicated High Degree of Bowing on Certain Channels.Cause Being Investigated.Ge Evaluating Implications of Channel Bowing (← links)
- 05000219/LER-1996-011, :on 961026,discovered Primary Leak Rate Above TS Limit.Caused by Improper Valve Reassembly on V-26-5 During 16R Outage.Replaced Valve V-26-5 O Rings,Reassembled Subject Valve & Revised Procedures (← links)
- 05000219/LER-1988-004-01, :on 880229,isolation Condenser Actuation Pressure Sensors Exceeded Setpoint Limit.Caused by Inadequate Instrument Repeatability.Pressure Sensors Adjusted within Desired Setpoint (← links)
- 05000219/LER-1984-034, :on 841214,MSIV Isolation Sensor Switches Tripped at Values Lower than Specified in Tech Specs.Caused by Instrument Repeatability.Pressure Switches Reset to Trip within Setpoint Limit (← links)
- 05000219/LER-1985-005, :on 850210,six Out of Eight Isolation Condenser Pipe Break Sensors Out of Spec.Caused by Instrument Drift on Sensors.Sensor IB11A1 Had Defective Switch Actuating Cam. Cam Replaced.Five Other Sensors Reset (← links)
- 05000219/LER-1978-027-03, /03L-0 on 781125:switch RE03C Was Found to Trip at Pressure Less conservative(1075 Psig)Than Specified in Tech Specs 2.3.3.Cause of Pressure Switch Tripping Is Attributed to Sensor Repeatability (← links)
- 05000219/LER-1978-027, Forwards LER 78-027/03L-0 (← links)
- 05000219/LER-1988-001-01, :on 880106,unusual Instrument Indications on Shutdown Cooling Sys & Reactor Recirculation Pump Seal Pressure Noted.Caused by Heating Sys Out of Svc,Low Temp & Personnel Insensitivity to Bldg Temp (← links)
- 05000219/LER-1987-046, :on 871111,reactor Safety Valve Discovered Leaking During Reactor Vessel Hydrostatic Pressure Test. Caused by Mechanical Fatigue Failure on Manual Lift Nut on Cotter Pin.Valve Replaced & All Nuts Removed (← links)
- 05000219/LER-1984-015, :on 840125 & 0625,discovered That Hfa Relays W/Date Code Hw Began to Fog W/Unknown Oily Vapor When Energized.Caused by Mist Created When Coil Energized.Relays Cleaned (← links)
- 05000219/LER-1997-006, :on 970419,reactor Shutdown Required by Control Rod 5% Scram Times Occurred.Caused by Sticking of Viton a Diaphragms in Scram Solenoid Pilot Valves.Diaphragms Replaced (← links)
- 05000219/LER-1997-005, :on 970408,standby Liquid Control Sys Sample Reporting Requirements Were Not Met Due to Inadequate Procedure.Appropriate Plant Documents Will Be Revised to Reflect TS Requirement (← links)
- 05000219/LER-1997-004-01, :on 970312,discovered That RWC Valve May Not Operate During Line Break Due to Personnel error.V-16-2 Was Declared Inoperable & Deactivated in Closed Position to Stop Opening W/Pressure Greater than 125 Psig (← links)
- 05000219/LER-1985-025, :on 851216,inadvertent Automatic Main Steam Line Isolation Occurred During Startup Activities.Caused by Operator Cognitive Error.Operator Training Re Event Will Be Initiated (← links)
- 05000219/LER-1985-019, :on 850821,nonconservative Direction of Main Steam Line High Flow Detectors of Established Setpoints Noted.Cause Undetermined.Correct Value Calculated,Reviewed & Implemented.Investigation Ongoing (← links)
- 05000219/LER-1986-003-02, :on 860210,during Testing of Pipe Break Sensors,Three Out of Eight Differential Pressure Switches Tripped Above Tech Spec Values.Caused by Setpoint Drift. Sensors Readjusted (← links)
- 05000219/LER-1985-021, :on 851119,during Performance of APRM Surveillance Test & Calibr Procedure,Aprm Flow Converter Trip Setpoint Exceeded Tech Spec Acceptance Criteria.Caused by Setpoint Drift.Setpoint Reset (← links)
- 05000219/LER-1985-022, :on 851120,main Generator Tripped,Causing Turbine Trip & Full Reactor Scram.After Scram Reset,Msiv Closure Scram Occurred.Generator Trip Due to Phase B Differential Current Relay Trip.Unit Replaced (← links)
- 05000219/LER-1985-020, :on 851111,diesel Generator 1-2 Declared Inoperable When Reverse Power Relay Tripped During Surveillance Test.Caused by Electric Governor Actuator Controller Failure.Controller Replaced (← links)
- 05000219/LER-1997-003-01, :on 970311,suppression Pool Bypass Flow Path Was Created During Preventive Maint Due to Inadequate Safety Review.Reviewed & Revised Process for Revising PMs (← links)
- 05000219/LER-1985-023, :on 851211 Re Emergency Svc Water Sys Seismic Concerns.Caused by Original Design Error.Procedures Used to Determine Pump Operability Revised to Change Min Acceptable Flow Rate & Engineering Evaluation Performed (← links)
- 05000219/LER-1984-020-01, :on 840910,power Lost to busses,1A2 & 1B2, Resulting in Full Scram,Reactor Primary & Secondary Containment Isolation & Loss of Standby Gas Treatment Sys Trains.Caused by Faulty Overcurrent Device (← links)
- 05000219/LER-1997-002-01, :on 970228,reactor Building Vent Radiation Monitor Setpoints Exceeded TS Limits Due to Personnel Error. Verification Was Performed to Ensure That No Other Incorrect Calibrs Occurred (← links)
- 05000219/LER-1985-024, :on 851215,reactor Trip Occurred Due to High Neutron Flux Condition.Caused by Increase in Neutron Flux & Collapse of Voids in Core.All Trip Signals Reset,Stabilized & Maintained in Hot Standby Condition (← links)
- 05000219/LER-1985-016, :on 850809,automatic Reactor Scram Occurred on Coincident Signals of APRM Downscale & Intermediate Range Monitors (IRM) High.Caused by Operator Error.Procedure for IRM Operation Revised (← links)
- 05000219/LER-1996-008, :on 961025,manual Scram Occurred Due to Main Generator Runback.Brought Plant to Hot Shutdown Condition, Troubleshooting Runback Circuit & Generator Runback Circuit Instrumented Down to Individual Switch Status (← links)
- 05000219/LER-1996-010, :on 961016,failure of Remote Shutdown Equipment to Operate Occurred.Caused by Dirty Contacts on Control Relay for V-14-37 in Rsp.Surveillances on Remote Shutdown Sys More Frequently Performed (← links)
- 05000219/LER-1996-009, :on 961027,actuation of Engineered Safety Features Occurred.Caused by Loss of Power Due to Cable Fault.Power Was Restored to RPS2 from an Alternate Supply. Faulty Cable Replaced & Other Cables Tested (← links)
- 05000219/LER-1997-001, :on 970103,seven Penetrations in Five Sys Did Not Meet Requirements as Described in GL 96-06.Caused by Previous Analyses Were Performed Without Using Conservation Assumptions.Determination Was Performed (← links)
- 05000219/LER-1985-015, :on 850708,scram Occurred on Low Condenser Vacuum.Caused by Cracked Drain Pump 1-1 Casing & Tube Leak in Steam Packing Exhauster.Drain Pump 1-1 Replaced & Drain Pump 1-2 & Tube Leak Repaired (← links)
- 05000219/LER-1996-015, :on 961220,determined RWCU Isolation Valves May Not Operate During Line Break Due to non-conservative Analysis.Provided Interim Guidance to Licensed Operators Re RWCU Sys & Bypassed Thermal Overloads (← links)
- 05000219/LER-1985-013, :on 850629,drywell-to-torus Differential Pressure Found Below Min Value of 1.0 Psid.Caused by Personnel Error.Torus Pressure Recorder Pen Turned on & Proper Differential Pressure Established (← links)
- 05000219/LER-1985-017, :on 850708,drywell Bulk Average Temps Exceeded. Cause Under Investigation But Appears to Be Associated W/Cooler Design Capacities.Addl Thermocouples at Lower Elevation in Drywell Utilized (← links)
- 05000219/LER-1996-013, :on 961113,mounting Bolts Were Missing from a Seismic Restraint Frame Around (MCC)DC-2.Caused by Personnel Error.Required Reading Will Be Issued & Job Orders Provided with Specific Instructions (← links)
- 05000219/LER-1996-012, :on 961112,racked Out Breakers in 4160 Volt Ac Switchgear Did Not Meet Seismic Design Bases.Caused Because Previous Seismic Qualification Walkdowns Failed to Identify Problem.Tie Breakers Were Removed from Cubicle (← links)
- 05000219/LER-1996-006, :on 960818,augmented Offgas Hydrogen Analyzer Left Out of Service.Caused by Procedure Deficiency.Returned Analyzer to Service,Reviewed Procedure & Counseled Operators on Sys Startup (← links)
- 05000219/LER-1985-012, :on 850612,reactor Protection Sys Scrammed Due to MSIV Closure & South Scram Discharge Vol Did Not Fully Isolate.Caused by Mechanical Failure of Electric Pressure Regulator.Component Replaced (← links)
- 05000219/LER-1981-065-01, /01T-1:on 811209,isolation Condenser Valve V-14-30 Failed to Properly Operate.Caused by Excessive Stress on Valve Backseat.Standing Order 33 Issued to Preclude Recurrence (← links)
- 05000219/LER-1996-007, :on 960904,reactor Scrammed During Condenser Backwashing Due to Low Vacuum.Reactor Was Placed in Cold Shutdown Mode Immediately (← links)
- 05000219/LER-1992-015, :on 921231,containment Isolation & Standby Gas Treatment Sys Initiation Occurred.Caused by Blown Fuse Due to Personnel Error.Isolation Reset & SGTS Operations Terminated (← links)
- 05000219/LER-1984-024, :on 841027,one of Two Switches Associated W/ Reactor lo-lo Water Level Sensor RE02C Failed to Trip at Setpoint Required by Procedure.Core Spray Instrumentation Channel Test Procedure Revised (← links)
- 05000219/LER-1985-010, :on 850522,upscale & Downscale Intermediate Range Monitor Setpoints Discovered Exceeding Tech Spec Limits.Caused by Inadvertent Deletion of Alignment Procedure in Sept 1979.Setpoints Documented & Reset (← links)
- 05000219/LER-1993-001, :on 930101,offsite Power Line Failed.Caused by Lightning Arrestor Failure.Circuit Breaker Manually Opened to Prevent More Power Perturbations Until Arrestor Could Be Repaired (← links)
- 05000219/LER-1985-009, :on 850516,determined That 480-volt Unit Substation 1A2 or 1B2 May Be Overloaded During LOCA W/ Offsite Power Available & Concurrent Loss of One Unit Substation.Caused by Design Deficiency (← links)
- 05000219/LER-1976-002-01, /01P-0:on 760106,local Leak Rate Tests Revealed That Reactor Bldg to Torus Vacuum Breakers V-26-16 & V-26-18 Had Combined Leakage Rate in Excess of Tech Specs Limit. Cause Unknown.Valves Will Be Adjusted &/Or Repaired (← links)
- 05000219/LER-1976-001-01, /01P-0:on 760102,during Test of High Drywell Pressure Initiation of Core Spray Sys 2,high Drywell Pressure Switch RV46B Tripped at 2.75 Psig.Caused by Failure of Barton Itt Model 278 Pressure Switch (← links)
- 05000219/LER-1976-004-01, /01P-0:on 760123,during Surveillance Testing, Cooling Water Pressure Found Less than Tech Specs Limit. Caused by Loss of Engine Coolant Through Radiator Tube Leak. Radiator Repaired (← links)
- 05000219/LER-1976-005-01, /01P-0:on 760303,during Diesel Generator Loading Test Procedure,Diesel Generator 2 Started in Fast Start Mode,But Did Not Develop Sufficient Voltage to Come on to 1D Bus & Assume Sequential Loads.Caused by Relay Failure (← links)
- 05000219/LER-1976-008-03, /03L-0:on 760326,while Performing Surveillance of High Drywell Pressure Initiation of Core Spray Sys Pressure Switch RV46C Trip Point Found Less Conservative than Tech Specs Limit.Cause Not Stated.Pressure Switch Reset (← links)
- 05000219/LER-1976-009-03, /03L-0:on 760401,during Automatic Actuation Test for Containment Spray Sys 2 Trip Point for Drywell High Pressure Switches 1P15B & 1P15D Found Less Conservative than Tech Specs Limit.Caused by Instrument Setpoint Drift (← links)
- 05000219/LER-1976-015-03, /03L-0:on 760425,during Surveillance of Core Spray Sys 2 Pumps,Leak Found in Sensing Line Leading to RV40B Pressure Switch.Caused by Cold Cycle Fatigue Failure.Sensing Line Replaced (← links)
- 05000219/LER-1976-014-03, /03L-0:on 760423,operations Personnel Discovered That Inboard Pump Seal on Core Spray Pump NZ01B Cracked. Cause Unknown.Pump Seal Replaced & Pump Returned to Svc (← links)
- 05000219/LER-1992-010, :on 920824,high Steam Flow Occurred During Warmup of Main Turbine That Resulted in Reactor Low Water Level Scram.Caused by Drift in Adjustment of Sv.Threads on Restoring Arm Will Be Repaired (← links)
- 05000219/LER-1992-009, :on 920822,reactor Scrammed on Low Water Level Due to Failure of Proportional Amplifier.Failed Proportional Amplifier Replaced & Plant Restarted (← links)
- 05000219/LER-1992-011, :on 920826,discovered That Circuitry of Six Valves May Be Susceptible to Hot Shorts During CR Fire That Could Render Valves Inoperable.Caused by Failure to Meet App R Design.All Valves Will Be Modified (← links)
- 05000219/LER-1996-004, :on 960409,during Leak Testing of Containment Spray Sys HX 1-1 tubes,1-2 HX Thermal Relief Valve Was Found in Open Position,Causing Approx 100 Gallons of Torus Water to Leak.Leak Isolated (← links)
- 05000219/LER-1996-003, :on 960409,determined Certain 4160 Vac Emergency Electrical Bus Grid Undervoltage Relay Contacts Not Functionally Tested Required by TS Table 4.1-1,Items 28 a & B.Caused by Inadequate Testing (← links)
- 05000219/LER-1985-008, :on 850401,review of Tech Spec Amend 80 Revealed New Testing & Calibr Requirements for 4,160-volt Emergency Bus Undervoltage & Degraded Voltage Equipment Not Yet Incorporated in Existing Plant Procedures (← links)
- 05000219/LER-1985-007, :on 850320,discovered Outside Floor Drain Sample Tank Used But Not Sampled Since 850313.Caused by Personnel Error & Lack of Procedural Controls.Radwaste & Chemistry Operating Procedures Revised (← links)
- 05000219/LER-1992-012, :on 920912,discovered as Found Trip Setpoints for High Pressure Relief Function on Two EMRVs Above Ts. Caused by Instrument Drift.Pressure Switches Adjusted to Actuate within TS Limits (← links)
- 05000219/LER-1996-005, :on 960430,reactor Scram Occurred on Low Water Level Due to Personnel Error.Discussion of Event Issued to Operators & Interim Guidance Issued to Operators on Reactor Water Level Control (← links)
- 05000219/LER-1984-033, :on 841203,automatic Scram Occurred Due to Low Condenser Vacuum.Caused by Operator Error.Event Will Be Reviewed During Operator Training & Caution Added to Startup Procedure (← links)
- 05000219/LER-1984-032, :on 841126,monthly Channel Test of Main Steam Line Safety & Relief Valve Acoustic Monitors Not Performed within Required Tech Spec Time Period.Caused by Personnel Error.Personnel Counseled (← links)
- 05000219/LER-1984-017, :on 840627,primary Containment Isolation Valves & Main Steam Valves Inadvertently Repositioned.Caused by Mod Involving Plant Computer Sys.Containment Isolation Valves Modified (← links)
- 05000219/LER-1985-002-01, :on 850202,two Containment Isolation Valves in Single Penetration Inoperable.Caused by Supply Breaker Trip & Damaged Lantern Ring Causing Valve Stem to Bind.Breaker & Valve Closed.Valve Repaired (← links)
- 05000219/LER-1996-002, :on 960329,discovered Low Voltage Alarm Setpoint Changed to Value Beyond TS Limit.Caused by Improper Work Practice.Battery Charger Surveillance Procedure Revised & Low Voltage Sensing Relays Adjusted (← links)
- 05000219/LER-1984-009-01, :on 840922,secondary Containment Integrity Degraded While Contractor Personnel Opened Both Doors of Reactor Bldg Personnel Access Airlock to Transport Pipe. Caused by Personnel Error.Personnel Counseled (← links)
- 05000219/LER-1996-001, :on 960313,TS Required Surveillances on SCIVs V-28-0042 & V-28-0043 Missed Due to Procedural Inadequacy. Procedures Relating to SCIVs Will Be Reviewed & Revised as Necessary to Include Testing of Valves (← links)
- 05000219/LER-1985-001-01, :on 850110,lo-lo-lo Level Sensor Remained Out of Svc Longer than 1 H.Caused by Personnel Error & Surveillance Procedure Deficiency.Personnel Instructed & Procedure Revised (← links)
- 05000219/LER-1984-020, :on 840910,power Lost to Buses 1A2 & 1B2, Resulting in Full Scram.Caused by Faulty Overcurrent Device Causing Breaker 1B2M to Trip on Overload Due to Current Surge.Defective Device Replaced & Tested (← links)
- 05000219/LER-1992-008, :on 920608,one Isolation Condenser Became Inoperable Requiring TS Required Shutdown.Caused by Packing Leak on V-14-33 Attributed to Scored Stem.Stem Stoned & Smoothed & Valve Repacked & Returned to Svc (← links)
- 05000219/LER-1992-007, :on 920610,reactor Scram Occurred During Reactor Startup.Caused by Failed Bypass Switch.Plant Placed in Cold Shutdown Condition & Both Bypass Switches Replaced (← links)
- 05000219/LER-1984-028, :on 841104,two Electromatic Relief Valves in Automatic Depressurization Sys Failed to Operate as Designed.Caused by Leakage Through Threads of Main Valve Disc Retainer.Maint Procedures Revised (← links)
- 05000219/LER-1984-027, :on 841103,during Startup,Standby Liquid Control Sys Vol/Concentration Below Tech Spec Min Limit. Caused by Personnel Error & Improper Procedures.Chemicals Added & Procedures Will Be Improved (← links)
- 05000219/LER-1992-004, :on 920424,discovered That Testing Methodology for Flow Converter Units for RPS Resulted in Loss of High Recirculation Flow Scram Protection.Caused by Procedural Inadequacy.Surveillance Procedure Revised (← links)
- 05000219/LER-1984-029, :on 841105,TN-9 Spent Fuel Shipping Cask Lifted by 100 Ton Capacity Reactor Bldg Crane Above Top Plate W/Unadjusted Vertical Limit Switches.Caused by Deficient Procedure.Personnel Reinstructed (← links)
- 05000219/LER-1984-025, :on 841029,core Spray Sys I Inadvertently Initiated & Injected Torus Water Into Vessel.Caused by Personnel Error.Personnel Debriefed & Instructed on Lessons Learned from Occurrence (← links)
- 05000219/LER-1984-030, :on 841031,reactor Automatically Scrammed Due to Low Water Level.Caused by Operator Failure to Establish Feedwater Flow from Reactor Feed Pump During Plant Heatup. Plant Procedures Revised (← links)
- 05000219/LER-1985-006, :on 850224,during Startup,Automatic Scram Occurred Due to Low Reactor Water Level.Caused by Operator Error.Drywell Access Procedure Will Be Revised to Caution Operators on Sensitivity of Level & Pressure (← links)
- 05000219/LER-1995-009, :on 960103,two APRM Were Inoperable Due to Lack of Complete Understanding of Circuitry.Addl Training on APRM Sys Provided & Quarterly Surveillance Test & Vendors Manual Revised (← links)
- 05000219/LER-1984-023, :on 841023,containment Isolation Valves V-27-1, 2,3 & 4 Did Not Close Upon Loss of Instrument Air.Caused by Inadequate Design Spec of Valves.Valve Air Lines Disconnected.Valves Locked Closed (← links)
- 05000219/LER-1984-022, :on 841016,three Scram Discharge Vol Vents & Drain Valves Exceeded Max Closing Time.Caused by Improperly Installed Diaphragm in solenoid-operated Air Valve.Diaphragm Installed Correctly (← links)
- 05000219/LER-1985-004, :During 850102-30,power Shape Monitoring Sys Calculations Inadequate Due to Flux Peaking Outside of Instrument Calibr Range.Caused by Error in Acceptance Criteria.Core Thermal Power Reduced (← links)
- 05000219/LER-1985-003, :on 850129,design Deficiency Discovered in Core Spray Sys Booster Pump Failure Logic.Caused by Deficiency in Original Plant Design.Mods to Replace Pressure Switches on Booster Pump Discharge Implemented (← links)
- 05000219/LER-1984-019, :on 840817,scram Discharge Vol Drain Valves V-15-121 & V-15-134 Failed to Close.Caused by Mispositioned Mechanical Override to V-15-121 & Binding in V-15-134. Override Repositioned & V-15-134 Overhauled (← links)
- 05000219/LER-1995-005, :on 950825,identified non-conservative Instrument Setpoint for Anticipatory Scram Bypass Pressure Switches Due to Original Plant Design.Revised Plant Operation Procedures (← links)
- 05000219/LER-1984-018, :on 840809,flow Rate Through Standby Gas Treatment Sys 2 Found Below Tech Spec 4.5.K.1.b.3 Limit. Cause Indeterminable.Manual Damper in Sys Adjusted & Retested (← links)
- 05000219/LER-1992-006, :on 920510,EMRV Pressure Sensor Surveillance, as Found Trip Setpoint for High Pressure Relief Function Above TS Limit.Caused by Instrument Setpoint Repeatability. Pressure Switch Immediately Adjusted (← links)
- 05000219/LER-1992-005, :on 920503,reactor Scram & Subsequent Engineered Safety Features Sys Actuations Occurred Due to Turbine Load Rejection.Util Personnel Inspected Offsite Power Lines (← links)
- 05000219/LER-1992-002, :from 920323-0409,DG 2 Out of Svc for More than 7 Days When DG Failed to Complete Operability Test.Caused by Broken Component in 4,160-volt Output Breaker.Schedule for Overhauling Breakers Under Development (← links)
- 05000219/LER-1992-003, :on 920420,operator Overlooked Portion of Step in Procedure to Stop Containment Spray Pump.Caused by Personnel Error.Procedural Changes Made,Separating Multiple Action Statements in Involved Procedure Step (← links)
- 05000219/LER-1995-008, :on 951218,reactor Scram Occurred on High RPV Pressure Due to Main Generator Runback.Repaired Faulty Temp Control Valve (← links)
- 05000219/LER-1992-001-01, :on 920312,rept Received Re Sparks from Status Lights for Undervoltage Protection Circuit in Front of 4,160 Volt Emergency Switchgear.Caused by Design of Lamp Sockets & Circuitry.Damaged Wiring & Fuse Replaced (← links)
- 05000219/LER-1995-006, :on 951011,inoperable Emergency Lighting Units Resulted in Operation Not in Compliance W/Ts.Caused by Lack of Procedural Direction.Wrote Preventative Maint Task to Direct Immediate Repairs (← links)
- 05000219/LER-1995-007, :on 951010,TS Required Surveillance Was Missed Due to Administrative Error.Nuclear Safety Assessment Group Performed Audit of Past Surveillance Activities (← links)
- 05000219/LER-1984-016, :on 840625,during Review of Instrument Surveillance Procedures,Not All 60 Installed Excess Flow Check Valves Found Functionally Tested Per Tech Specs. Functional Test Surveillance Rev in Progress (← links)
- 05000219/LER-1984-014, :on 840530,during Review of Surveillances within Maint Organization,Discovered That Test of Reactor Low Level Instrumentation Not Performed within Required Time Period.Caused by Personnel Error (← links)
- 05000219/LER-1984-013, :on 840606,post-indicating Valve V-9-12 Damaged by Maint Vehicle,Resulting in Loss of Fire Suppression Water Sys.Caused by Soft Soil & Lack of Protection Around Valve. Damaged Valve Repaired & Water Sys Restored (← links)
- 05000219/LER-1984-011, :on 840527,both Trains of Standby Gas Treatment Sys (SGTS) Inoperable for 9 Minutes While Performing Preventive Maint on Circuit Breaker.Caused by Design Deficiency in Control Sys Sgts.Sgts Modified (← links)
- 05000219/LER-1984-012, :on 840604,emergency Diesel Generator 1 Day Tank Level High/Low Alarm Received.Generator 1 Shut Down, Resulting in Both Emergency Diesel Generators Inoperable Simultaneously.Caused by Repositioned Switch (← links)
- 05000219/LER-1984-010, :on 840510,for Number of Iterations,Fuel Pool Gates Moved Over Irradiated Fuel Bundles in Violation of Tech Spec.Caused by Procedural Error.Handling Procedure Will Be Revised (← links)
- 05000219/LER-1984-006-01, :During 1983,blast Cleaning of Torus Structure Components Revealed Areas of Corrosion Pitting & Missing Fillet Welds on Ring Girders.All Irregularities Repaired (← links)
- 05000219/LER-1991-003-01, :on 910613,locked High Radiation Area Found Unlocked.Caused by Several Personnel Errors.Appropriate Disciplinary Action Taken W/Regard to Personnel Involved in Incident (← links)
- 05000219/LER-1984-004-01, :on 840421,both Reactor Bldg Airlock Doors Found Open at Same Time,Violating Tech Specs.Caused by Personnel Error.Doors Closed.Employee Procedure Training Increased (← links)
- 05000219/LER-1984-007, :on 840402,standby Gas Treatment Sys (SGTS) II Not Tested within Tech Spec Limits.Caused by Failure of Emergency Power Supply for SGTS I.Change to Tech Specs Under Investigation (← links)
- 05000219/LER-1975-033, :on 751212,125-volt Dc Distribution Ctr of Station Battery a de-energized,Caused by Personnel Error.Ctr re-energized Immediately.Change Drafted for Procedure 601.2.2 (← links)
- 05000219/LER-1975-034-01, /01P-0:on 751223,vacuum Breaker V-26-7 Failed to Demonstrate Operability During Surveillance Testing.Caused by Growing Problem in Teflon Bushings.Purchase Order Issued for Replacement Parts (← links)
- 05000219/LER-1976-003-01, /01P:on 760106,standby Gas Treatment Sys Failed to Demonstrate Capability to Maintain 0.25 Inch of Water Vacuum.Caused by Personnel Error.Inner Railroad Airlock Door Not Closed properly.W/760112 Memo (← links)
- 05000219/LER-1991-008, :on 911112,difference Between Test Measured & Indicated Feedwater Flow Discovered as Result of Special Lithium Nitrate Flow Test.Cause Not Determined.Reactor Power Reduced to Account for Difference (← links)
- 05000219/LER-1991-002, :on 910221,local Leak Rate Testing Identified MSIV W/Leak Rate in Excess of Acceptance Criteria of 12.08 Scfh at 20 Psig.Caused by Age of Soft Disc Seat on One Valve.Leaking Valves Repaired (← links)
- 05000219/LER-1991-007, :on 911102,discovered That Offgas Sys Isolation Function Exceeded 15-minute Delay Limit in Ts. Caused by Inadequate Technical Evaluation of Replacement Time Delay.Surveillance Procedures Revised (← links)
- 05000219/LER-1995-004, :on 950608,SRO Group Shift Supervisor Left CR During TS Required Time.Caused by Personnel Error. Re-enforcement of Station Mgt Expectations Re Direct face- to-face Turnovers W/Personnel (← links)
- 05000219/LER-1983-018-03, /03L Submittal Delayed Due to Need for Plant Operations Review Committee Investigation Into Cause & Corrective Actions.Ro Will Be Submitted by 831108 (← links)
- 05000219/LER-1991-006, :on 910924,check Revealed Degradation in Flow Dampening Snubber Performance for Seven of Eight Sensors. Caused by Inadequate Design Control.Snubbers Removed from Pipe Break Sensors (← links)
- 05000219/LER-1995-003, :on 950531,discovered That Six Month Drywell Airlock Leak Rate Test Conducted After Due Date.Caused by Inappropriate Application of 25% Surveillance Interval Extension.Surveillance Task Revised (← links)
- 05000219/LER-1995-002, :on 941106,core Alteration Was Unsupervised Due to Personnel Error in Decision Making.Reviewed & Revised error-free Refueling Plan & Related Refueling Procedures (← links)
- 05000219/LER-1991-004-01, :on 910803,trouble Alarm Received for Fire Zone on 51-ft Elevation of Reactor Bldg & Hourly Instead of Continuous Fire Watch Set.Caused by Personnel Error & Inadequate Guidance.Guidance Established (← links)
- 05000219/LER-1982-062, Has Been Canceled (← links)
- 05000219/LER-1983-007-03, /03L-0:on 830418,during Monthly 10 H Operability Test of Standby Gas Treatment Sys Ii,High Differential Pressure Across Both HEPA Filters Observed.Caused by Plugging of Filters.Filters Replaced (← links)
- 05000219/LER-1984-005-04, :on 840322,during Isolation Condenser NEO1-A Hydro Test,Leak Noticed Near Insulated Elbow on Condensate Piping.Caused by Crack Near Weld NE-2-12 Due to Igscc. Samples from Failed Area Will Be Analyzed (← links)
- 05000219/LER-1984-002-01, :on 840302,unit Substation Circuit Breaker to Motor Control Ctr 1B32 Failed to Trip When Undervoltage Device Deenergized.Circuit Breakers to Shut Down Cooling Pump Failed to Trip.Shaft Bearings Cleaned (← links)
- 05000219/LER-1976-013-01, /01P-0:on 760503,secondary Containment Integrity Violated.Caused by Willful Violation of Plant Procedures. Contractor Personnel Instructed on Reactor Bldg Door Interlock Purpose & Seriousness of Event (← links)
- 05000219/LER-1976-026-01, /01P-0:on 761012,unplanned Radioactive Release to Discharge Canal Not Monitored.Caused by Design Error Routing Relief Valve Discharge Via 1-5 Sump Instead of to Radwaste Facility Via High Conductivity Tank.Valve to Be Rerout (← links)
- 05000219/LER-1982-060-03, /03L-0:on 821210,reactor Mode Switch Repositioned from Shutdown to Refuel While Intermediate Range Monitor Channels 16 & 17 Out of Svc.Caused by Personnel Error.Strict Compliance W/Tech Specs Emphasized (← links)
- 05000219/LER-1984-001-01, :on 840302,diesel Generator 2 Oil Tank Level Measured Above Tech Spec Limit.On 840303,level Measured Below Limit by Level Gauge & Exceeded Limit by Visual Insp. Oil Transfered to Tank (← links)
- 05000219/LER-1983-025-03, /03L-0:on 831201,maint & Surveillance Procedures Identified as Not Adequately Verifying Excess Flow Check Valves Open Following Operations.Caused by Inadequate Maint & Surveillance Procedures.Procedures Revised (← links)
- 05000219/LER-1983-019-03, /03L-0:on 831114,during Surveillance of Standby Gas Treatment Sys,Reactor Bldg Ventilation Valve V-28-22 Failed to Close on Isolation Initiation Signal.Caused by Piece of Piston Breaking Off.Piston Repaired (← links)
- 05000219/LER-1983-021-03, /03L-0:on 831012,loss of Main Bus 1A & Emergency Bus 1C Rendered One Standby Gas Treatment Sys Train Inoperable.Stack Gas Sampling Capability Lost for Approx 3 Had Pump a Shutdown Due to Loss of Power (← links)
- 05000219/LER-1995-001, :on 950221,discovered That SW RMS Had Not Been Functionally Tested Since May 1993 Due to Inadequate Mgt Oversight.Svc Water Radiation Monitor Quarterly Functional Testing Performed (← links)
- 05000219/LER-1983-020-03, /03L-0:on 830916,svc Water Pump 1-2 Breaker Failed to Trip When Undervoltage Device Deenergized.Caused by Component Failure Due to Burr on Latch Surface.Preventive Maint Done on Breaker & Burr removed.w/831019 Ltr (← links)
- 05000219/LER-1983-017-01, /01T-0:on 830826,arming Relay for Diesel Generator Protective Relay Set at Value Possibly Causing Breaker to Open During Fast Start.Caused by Design Deficiency.Setting Changed (← links)
- 05000219/LER-1994-022, :on 941219,primary Containment Leak Rate Exceeded TS Requirements Due to Maint Procedure Noncompliance.Valve Stroke Length Was Readjusted & Performed Local Leak Rate Test (← links)
- 05000219/LER-1991-005-01, :on 910822,reactor Scram Occurred Due to Low Reactor Water Level.Caused by Grounded Condensate Pump Motor Which Led to Condensate Pump Trip.Pump Motor Replaced.Mgt Will re-emphasize Procedural Compliance (← links)
- 05000219/LER-1991-002-01, :on 910221,local Leak Rate Testing Identified MSIV W/Leak Rate in Excess of Limits Due Valve Degradation. Mfg,Atwood & Morrill Modified Original Design to Provide Assurance That MSIVs Would Meet Requirements (← links)
- 05000219/LER-1994-021, :on 941119,inadvertent Introduction of Low Speed Demand Succeeded by High Speed Demand from DCS Led to Total Recirculation Flow Exceeding High Flow Scram Setpoint While Performing Troubleshooting (← links)
- 05000219/LER-1994-019, :on 941019,SBO Power Supply Failed to Start During Functional Test Due to Inadequate Design Mod Due to Inadequate Administrative Control.Ups Installed to Power Gas Leak for CT-1 (← links)
- 05000219/LER-1994-018, :on 940924,containment Exhaust Valves Inadvertently Isolated Due to Improper Switch Position. Caused by Fabrication Deficiency.Four Isolated Valves Reopened & Surveillance Procedure Revised (← links)
- 05000219/LER-1991-001, :on 910301,deluge Sys Taken Out of Svc W/O Establishing Continuous Fire Watch.Caused by Personnel Error.Continuous Fire Watch Assigned & Lessons Learned Lecture Given to Fire Watch Personnel (← links)
- 05000219/LER-1983-015-03, /03L-0:on 830609,electricians Found Wire Wrapped Around Armature of Undervoltage Trip Device.Caused by Personnel Error in Installation of Wire Gag.Tripcoil,Blown Fuses & Static Time Delay Box Replaced (← links)
- 05000219/LER-1994-020, :on 941110,inadvertent Isolation of Containment Exhaust Valves Due to Operator Performance.Two Isolated Valves Reopened (← links)
- 05000219/LER-1983-004-03, /03L-0:on 830331,during Preventive Maint,Control Rod Drive Feed Pump NC08A Circuit Breaker Mechanically Closed Per Procedure.Investigation Revealed Breaker Should Not Have Closed.Caused by Binding Trip Shaft (← links)
- 05000219/LER-1994-007, :on 940531,reactor Scram Occurred Due to Modification Work in Switchyard.Placing Modification on Hold Pending Engineering Review & Strengthening Procedural Controls Over Switchyard Work (← links)
- 05000219/LER-1983-014-01, /01T-0:on 830406,design Deficiency Discovered in Heating Coil Control Circuitry for Standby Gas Treatment Sys Trains.Temporary Redundant Power Feed Provided Until Permanent Mod Installed During Current Maint Outage (← links)
- 05000219/LER-1983-008-03, /03L-0:on 830314,incorrect Undervoltage Trip Coil Installed on Core Spray Booster Pump Breaker,Preventing Manual Start.Caused by Personnel Error.Coil Replaced (← links)
- 05000219/LER-1994-017, :on 940915,two Reactor Triple Low Water Level Sensors Spuriously Actuated.Caused by Work Package Inadequacy.Isolated Valve Was Reopened & All Instruments Connected to Leg Lines Were Isolated (← links)
- 05000219/LER-1983-013-01, /01T-0:on 830327,both Doors of Reactor Bldg Personnel Access Airlock Opened Simultaneously.Caused by Personnel Error.Incident Reviewed W/Personnel & Appropriate Disciplinary Action Taken (← links)
- 05000219/LER-1983-012-01, /01T-0:on 830319,door to Main Steam Line Trunnion Room Found Open During Refueling Checkoff.Caused by Design Deficiency,Personnel Error & Failure to Post Sign Identifying Door as Secondary Containment.Door Closed (← links)
- 05000219/LER-1994-015, :on 940808,during Scheduled Monthly Surveillance C Emergency Svc Water Pump Was Below Procedural Operability Limit for Flow Rate.Caused by Biological Plugging.Shutdown Was Terminated (← links)
- 05000219/LER-1983-010-01, /01T-0:on 830307,design Deficiency Discovered When Standby Gas Treatment Sys (SGTS) II Racked Out for Maint. SGTS II Inlet & Outlet Valves Opened,Allowing Recirculation During Sys I Operation.Procedures Revised (← links)
- 05000219/LER-1983-011-03, /03L-0:on 830306,during Standby Gas Treatment Sys 10 H Operability Test in Sys II Preferential Mode,All Automatic Valves Not Lined Up Properly.Caused by Melted Sensing Line for Fan 1-9 Low Flow Switch.Lines Repaired (← links)
- 05000219/LER-1993-005, :on 930909,determined That TS 2.3.P.(2) Could Not Be Proven to Adequately Protect Loads on 4160 Volt AC Buses as Designed.Caused by Methodologies to Calculate AC Bus.Performed Voltage Drop Calculations for AC (← links)
- 05000219/LER-1994-013, :on 940726,TS Shutdown Margin Limit Exceeded Due to HCU 06-19 Being Tagged Out of Svc W/Associated CR in Full Out Position.Caused by Human Error.Hcu Returned to Svc & CR Fully Inserted (← links)
- 05000219/LER-1994-014, :on 940727,equalizing Valve on Sensor RE18-B Inadvertently Opened Due to Human Error.Equalizing Valve Sensor on RE18-B Closed & Instrument Line Excess Flow Check Valve Verified Open (← links)
- 05000219/LER-1994-012, :on 940724,while Performing EMRV Pressure Sensor surveillance,as-found Trip Setpoints for High Pressure Relief Function on Two EMRVs Exceeded TS Limit Due to Instrument Drift.Pressure Switches Adjusted (← links)
- 05000219/LER-1994-011, :on 940718,discovered That Control Panels Er 8A & Er 8B Housing Control Logic for Portions of ADS & CSS Did Not Meet Seismic Criteria Due to Original Design.Seismic Plates Installed to Limit Control Panel Motion (← links)
- 05000219/LER-1994-010, :on 940705,both Containment Spray & Emergency Service Water Systems Were Declared Inoperable.Caused by Biological Debris in Heat Exchangers.Cleaned,Inspected & Returned Heat Exchangers to Operability (← links)
- 05000219/LER-1994-009, :on 940701,discovered Design Deficiency Was Identified in DG (EIIS-EK) Automatic Initiation Logic.Caused by Original Plant Design.Mod Had Been Scheduled for 15R Refueling Outage to Remove Lockout Bus 1A & 1B (← links)
- 05000219/LER-1982-019-01, /01T-0:on 820331,local Leak Rate Test for Valves V-1-106 & V-1-111 Found Leakage Exceeding Tech Spec Limit. Caused by Deterioration of Valve Internals.Valves Repaired (← links)
- 05000219/LER-1983-003-03, /03L-0:on 830118,during Maint of Control Rod Drive Pump A,Pump Vent Line Broke Off.Core Spray Pump Nzoia Wetdown & B Pump Inadvertently Tripped.Cause Not Stated. Pump Removed from Svc & Motor Tested (← links)
- 05000219/LER-1991-001-01, :on 910301,deluge Sys Taken Out of Svc W/O Establishing Firewatch in Accordance W/Tech Specs.Caused by Personnel Error.Continuous Firewatch Assigned & Operations Mgt Reviewed Events (← links)
- 05000219/LER-1994-008, :on 940419,setpoints for High Pressure Relief Function on Two EMRVs Were Above That Specified in Tss. Caused by Setpoint Repeatability & Instrument Drift.Pressure Switches Were Adjusted within TS Limits (← links)
- 05000219/LER-1982-052-01, /01T-0:on 820828,environ Release Occured W/ Radwaste Discharge Monitor Out of Svc W/O Performing Second Sample Analysis.Caused by Personnel Error.Procedure Change Initiated Requiring Signed Liquid Release Permit (← links)
- 05000219/LER-1994-006, :on 940523,plant Placed in Cold Shutdown When Both CRD Pumps Found to Be Inoperable During Surveillance Testing.Stop Check Valve on CRD Pump B Replaced W/Separate Check & Globe Valves (← links)
- 05000219/LER-1982-054-03, /03L-0:on 821105,after Completing TIP Trace, Ball Valve on TIP Machine 3 Failed to Close.Caused by Moisture Buildup Around in-shield Limit Switch Operating Arm.Arm Cleaned & Switch Aligned (← links)
- 05000219/LER-1982-051-03, /03L-0:on 820930,unmonitored Release of Radioactive Liquid to Soil Around Waste Surge Tank,Pump & Attached Drain Piping Occurred.Caused by Severe Pitting in Bottom 10 Ft of Sidewall & Bottom of Tank (← links)
- 05000219/LER-1994-004, :on 940422,determined That Voltage Available at Motor Operator Combined W/Dynamic Blowdown Conditions Produce Valve Closure.Caused by Design Capabilities of Valves.Corrective Action:Revised Safety Rept (← links)
- 05000219/LER-1983-006-03, /03L-0:on 830206,all Automatic Valves Not Lined Up Properly During Execution of Standby Gas Treatment Sys 10 H Operability Test.Caused by Condensation in Fan 1-9 Low Flow Sensing Lines.Lines Cleaned (← links)
- 05000219/LER-1983-002-03, /03L-0:on 830123,startup Banks Removed from Svc Due to Dilution Plant Main Breaker Cable Termination Failure.Cause Under Investigation.Dilution Pump Power Feed Terminations Replaced (← links)
- 05000219/LER-1983-005-03, /03L-0:on 830126,while Performing Containment Spray Sys Automatic Actuation Test,High Drywell Pressure Switches IP15A,B & C Tripped at Value Greater than Tech Spec Limit.Cause Not Determined.Pressure Switches Readjusted (← links)
- 05000219/LER-1982-056-01, /01T-0:on 821120,output Breaker for A2 24-volt Dc Battery Charger Tripped.Caused by Setpoint Drift of Overvoltage Relay.Breaker Checked & Closed & Relay Setpoint Adjusted (← links)
- 05000219/LER-1982-043-03, /03L-0:on 821004,during Surveillance,Insp Port Cover Plate Found Out of Place in Standby Gas Treatment Sys 1 Degrading Train 1 Flow.Caused by Personnel Error.Cover Plate Replaced.Need for Addl Guidance Will Be Reviewed (← links)
- 05000219/LER-1982-045-03, /03L-0:on 820910,emergency Svc Water Pump 52A Declared Inoperable for Maint.Caused by Improper Impeller Clearance Setting.Pump Removed from Svc & Impeller Clearance Adjusted.Pump Returned to Svc (← links)
- 05000219/LER-1982-047-03, /03L-0:on 821004,loss of Power to Reactor Protection Sys Motor Generator Set 1 Caused Half Scram. Caused by Burned & Scarred Relay Contacts.Relay Replaced & Sys Returned to Svc.Spare Relays on Order (← links)
- 05000219/LER-1990-015, :on 901221,two Isolation Condenser Pipe Break Sensors Found to Trip Greater than Tech Spec Setpoint.Caused by Excessive Component Drift on Switches.Switches Adjusted to Trip within Tech Spec (← links)
- 05000219/LER-1986-010, :on 860513,hydraulic Snubbers Found W/Pipe Clamp to Shear Lug Welds Missing.Caused by Inadequate Communication Between Util & Vendor.Functional Test Performed on Snubbers (← links)
- 05000219/LER-1994-003, :on 940405,turbine Trip & Reactor Scram Occurred Due to High Reactor Water Level.Caused by Failure of Proportional Amplifier Which Provides Steam Flow Signals. Replaced Feedwater Flow Control Sys (← links)
- 05000219/LER-1978-030-03, /03L-0 on 781126:during Testing Containment Spray Pumps 51C & 51A Failed to Start on Signal Due to Excess Friction in Circuit Breaker Trip Bar Bearings.Bearings Were Cleaned & Lubricated (← links)
- 05000219/LER-1978-030, Forwards LER 78-030/03L-0 (← links)
- 05000219/LER-1994-002, :on 940213,fuel Oil Level in Main Fuel Oil Tank Dropped Below Level Necessary for Fire Protection Design Requirements.Caused by Insufficient Fuel Oil Deliveries. Fuel Deliveries Secured & Tour Sheets Revised (← links)
- 05000219/LER-1978-029-01, /01T-0 on 781129:during Test,Noted That Containment Leakage Rate Greater than Allowable.Discovered That Vent Valves Were Leaking.Caused by Leakage Past the Seating Surfaces (← links)
- 05000219/LER-1978-029, Forwards LER 78-029/01T-0 (← links)
- 05000219/LER-1978-028-01, /01T-0 on 781129:during Test,Main Steam Line Drain Valve V-1-106 Did Not Close 2 Incore Probes,Did Not Fully W/Draw & Reactor Coolant Valve Did Not Indicate Closed.Due to Jammed Armature,Faulty Fuse Holder & Incorrect Settin (← links)
- 05000219/LER-1978-028, Forwards LER 78-028/01T-0 (← links)
- 05000219/LER-1978-026-01, /01T-0:on 781121 torus-to-reactor Bldg Differential Pressure Switches DPS-66A & B Had Ruptured Diaphragms.Caused by Excessive Differential Pressure (← links)
- 05000219/LER-1978-024-03, /03L-0 on 781018:isolation Valve V-7-31 Had Damaged Rubber Seat & Drain Valve V-7-29 Obstructed by Piece of Cork & Filter F-1-58 Medium Disintegrated.Cause of V-7-31 & F-7-58 Degradations Due to Detonations in Sys (← links)
- 05000219/LER-1978-024, Forwards LER 78-024/03L-0 (← links)
- 05000219/LER-1982-057-03, /03L-0:on 821118,during Backsetting of Valve V-14-37,circuit on Terminal Block Failed Making Isolation Condenser 2 Inoperable.Caused by Stripped Thread on Screw & Circuit Backplate.Screw & Backplate Replaced (← links)
- 05000219/LER-1978-023-03, /03L-0 on 781019:IRM 12 Became Inoperative While Cable to IRM 14 Was Disconnected.Irm 12 Failure Attributed to Maint Activities Under Vessel.Subesquent Inspec Showed IRM 12 Cable Damaged (← links)
- 05000219/LER-1978-023, Forwards LER 78-023/03L-0 (← links)
- 05000219/LER-1978-022-03, /03L-0 on 781017:during Routine Surveillance Test of Standby Gas Treatment Sys,The Sys II Discharge Valve Failed to Open,Due to Stuck Solenoid in Control Air Supply to Operator for V-28-30 (← links)
- 05000219/LER-1978-017-03, /03L-0:on 780914,circuit Breaker for motor- Operated Valve Tripped When Valve Closed by Isolation Signal.Caused by Component Failure Allowing Switch Setting to Shift.Setting Corrected & Set Screw Tightened (← links)
- 05000219/LER-1978-018-01, /01T-0 on 780916:3 MSIVs(NS03A,NS04A,NS04B) Had Leakage Rates in Excess of Maximum Allowable Due to Stem Packing,Cracked Stellite Weld & Failure of Main Poppet to Seat Properly.Msiv Failures Being Investigated (← links)
- 05000219/LER-1978-018, Forwards LER 78-018/01T-0 (← links)
- 05000219/LER-1982-050-03, /03L-0:on 820828,reactor Vessel Pressurized in Excess of 110 Psig W/Reactor Water Temp Greater than 212 F. Caused by Inadequate Procedure 602.4.001.Test Procedure Will Be Reviewed to Redefine Temp/Pressure Requirements (← links)
- 05000219/LER-1982-049-03, /03L-0:on 820825,seven Hydraulic Snubbers Failed Functional Testing After Being Replaced by Certified Functional Spares.Two Snubbers Had Improper Matl Seals. Caused by Seal Degradation &/Or Worn Poppet Valves (← links)
- 05000219/LER-1982-039-03, During Surveillance Testing,Thermocouple for Safety Valve NR28J Found Inoperable.Caused by Terminal Screw Backing Out,Causing Intermittent Contact & Erratic Readings.Screw Replaced (← links)
- 05000219/LER-1982-044-01, /01T-0:on 820810,stack Gas Not Continuously Monitored as Required by Tech Spec Due to Overload Trip of Stack Gas Sample Pump B.Trip Caused by Vent Fan Being Turned Off & Valve SGM-23 Out of Adjustment.Fan Tagged (← links)
- 05000219/LER-1982-042-03, /03L-0:on 820716,during Surveillance Testing, Relay 16K118 & 15K14B Timers Failed,Preventing Automatic Actuation of Containment Spray Sys Ii.Caused by Instrument Drift.Relays Replaced & Tested (← links)
- 05000219/LER-1993-004, :on 930602,discovered That Incorrect UFSAR Could Result in Potential Design Concerns.Caused by Inadequate Documentation.Ufsar Will Be Revised to Include Results of Recent Evaluation (← links)
- 05000219/LER-1993-008-01, :on 931203,inadvertent Actuation of Core Spray Sys 1 Occurred During Surveillance Testing.Caused by Inattention to Duty.Corrective Actions Will Be Incorporated Into I&C Personnel Training Program (← links)
- 05000219/LER-1982-038-03, /03L-0:on 820630,monthly Surveillance of Safety & Relief Valve Backup Monitoring Sys (Thermocouples) Not Performed Per Tech Spec.Caused by Personnel Error & Inadequate Inplementation of Procedural Controls (← links)
- 05000219/LER-1982-016-03, /03L-0:on 820611,during Transfer of Spent Resin, Svc Air Piping Became Cross Contaminated W/Water,Resulting in Three Leaks to Environ.Caused by Blocked Vent Lines on Tank.Affected Sys Isolated (← links)
- 05000219/LER-1982-035-03, /03L-0:on 820615,off-gas Isolation Valve Did Not Indicate Closure.Caused by Piece of Foreign Matl Lodged in Redundant Solenoid Valve.Solenoid Valve Removed & Replaced (← links)
- 05000219/LER-1990-013, :on 900926,Tech Spec Violation Occurred Due to Missed Fire Watch Caused by Personnel Error (← links)
- 05000219/LER-1982-040-01, /01T-0:on 820707,signal Input Disconnected to Safety Valve Vibration Monitor Rendering Acoustic Monitoring Channel Inoperable.Cause Undetermined.Wire Reconnected & Alarm Will Be Added to Alarm Circuit (← links)
- 05000219/LER-1982-034-03, /03L-0:on 820616,300 Gallons of Contaminated Water Leaked to Environs Due to Broken Fitting.Caused by Failure of Threaded Connection on 1-2 Condensate Transfer Pump Discharge.Connection Replaced (← links)
- 05000219/LER-1982-041-01, /01T-0:on 820707 & 08,stack Gas Sample Pump B Electrically Tripped Overload Causing Stack Gas Sampling to Reduce to 0 Std Cubic Ft Per Minute.Caused by High Ambient Temp Near Motor Controller.Backup Pump Activated (← links)
- 05000219/LER-1990-011, :on 900723,unqualified Operators on Shift Due to Programmatic Inadequacies in Exam Process.Operators Involved Removed Immediately from Licensed Duty & Placed in Accelerated Requalification Program (← links)
- 05000219/LER-1990-010, :on 900718,electromatic Relief Valve High Pressure Relief Setpoints Discovered to Exceed Tech Spec Limit.Caused by Setpoint Repeatability & Instrument Drift. Pressure Switches Adjusted to Be within Limit (← links)
- 05000219/LER-1993-007-01, :on 931117,discovered Failure to Perform APRM Surveillance W/Max Recirculation Flow.Caused by Misunderstanding of TS Requirements.Aprm Channel Tested W/ Simulated Flows to Compliance W/Ts Limits (← links)
- 05000219/LER-1990-005, :on 900421,TS Required Shut Down Occurred Because of Loss of Power to safety-related Switchgear Due to Grounded Supply Cable.Caused by Void in Insulation of Cable. New Supply Cable Installed (← links)
- 05000219/LER-1993-005-01, :on 930909,determined That Second Level Undervoltage Trip Protection Setpoint May Be Incorrect as Result of Use of Improved Methodologies to Calculate Ac Bus Load Profiles.Calculation Will Be Reperformed (← links)
- 05000219/LER-1990-009, :on 900703,reactor Isolation Signal Inadvertently Initiated During Surveillance Test.Caused by Design Deficiency.Mods to Facilitate Testing Scheduled to Be Performed During Next Outage (← links)
- 05000219/LER-1993-006-01, :on 920508,discovered Plant Operation Outside Design Basis During Surveillance Testing Due to Procedure Omission.Ensured That MAPLHGR Does Not Exceed 90% During Execution of Subject Procedures (← links)
- 05000219/LER-1990-008, :on 900625,reactor Scram Occurred on Low Condenser Vacuum.Caused by Failure of Backwash Outlet Valve to Open,Causing Loss of Circulating Water to Condenser A. Plant Stabilized & Taken to Cold Shutdown (← links)
- 05000219/LER-1982-033-03, /03L-0:on 820613,control Rod Driveline Pump a Failed to Operate.Apparently Caused by Enlarging of Interstage Bushing Clearances in Rotating Assembly.Rotating Assembly Replaced (← links)
- 05000219/LER-1982-036-03, /03L-0:on 820618,water from Disassembled Control Rod Driveline Pump Found Overflowing from Temporary Drain Assembly Onto Core Spray Pump a Motor Housing.Cause Not Stated.Megger Check Performed on Core Spray Pump (← links)
- 05000219/LER-1982-018-03, /03L-0:on 820527,main Steam Line Drain Valve V-1-106 Operated & Failed to Close Fully.Caused by High Torque Trip.Repair or Replacement of Valve Will Be Accomplished During Next Shutdown (← links)
- 05000219/LER-1982-032-03, /03L-0:on 820524,during Reactor Shutdown,B Main Steam Line Tunnel Rod Monitors Output Failed Downscale. Caused by Drift of Grid Bias on front-end Amplifier.Drawer Replaced W/Operational Spare (← links)
- 05000219/LER-1982-028-03, /03L-0:on 820513,pump Breaker Permissive Switch Placed in Off Position in Response to Vibration Readings in Required Action Range,Rendering Core Spray Pump NZ01A Inoperable.Cause Not Determined.Sys Retested (← links)
- 05000219/LER-1982-027-03, /03L-0:on 820512,during Routine Visual Insp,Oil Puddle Discovered Below Liquid Poison Pump B.Caused by Plugged Stuffing Box 1-inch Drain.Pump Tagged Out,Oil Changed & Drain Cleared (← links)
- 05000219/LER-1982-026-03, /03L-0:on 820507,thermocouple for Safety Valve NR28J Found Open During Surveillance Testing.Caused by Broken Lead Wire at Thermocouple.One of Adjacent Valve Acoustic Monitor Setpoints Reduced.Thermocouple Replaced (← links)
- 05000219/LER-1982-015-03, /03L-0:on 820315,during Offgas Holdup Valve Isolation Test,Timer RN28 Timed Out 28-s in Excess of Tech Spec Limit.Caused by Instrument Drift.Timer Reset. Surveillance Test Will Be Performed Prior to Every Startup (← links)
- 05000219/LER-1981-061, Forwards Updated LER 81-061/03X-1.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-023-03, /03L-0:on 820418,during Normal Operation,Control Rod Drive Pump a Failed,Resulting in Operation in Degraded Mode.Cause Undetermined.Rotating Assembly Replaced (← links)
- 05000219/LER-1982-014-01, /01T-0:on 820410,local Leak Rate Testing Found That Five Containment Isolation Valves & One Gasket Did Not Meet 11.9 Scfh Acceptance Criteria.Caused by 1-8 Sump Discharge Seats Degrading.Valves Repaired & Gasket Replaced (← links)
- 05000219/LER-1982-022-03, /03L-0:on 820416,after 1B Breaker Closed & Startup Transformer S1B Breaker Failed to Operate,Operator Determined That Fuse Had Blown.Caused by Mild Momentary Overload.Fuse Replaced & Breaker Reset & Returned to Svc (← links)
- 05000219/LER-1982-022, Forwards LER 82-022/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-024-03, /03L-0:on 820414,while Performing Surveillance on Electromatic Relief Valve Pressure Switches,Three of Five Switches Tripped Below Tech Spec Limit.Caused by Instrument Repeatability & Drift.Instruments Reset (← links)
- 05000219/LER-1982-024, Forwards LER 82-024/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-021-01, /01P:on 820416,primary Containment Atmosphere Not Reduced to Less than 5% Oxygen within 24-h After Reactor Mode Selector Switch Placed in Run Position.Caused by Insufficient Nitrogen & Blown Rupture Disc (← links)
- 05000219/LER-1982-021, Forwards LER 82-021/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-017-03, /03L-0:on 820325,normal Auxiliary Power Bus 1C Relay Failed Totally & Svc Water Pump Trip Time Delay Relay SK8A Failed to Operate within Tech Spec Limits.Power Bus Failure Caused by Normal End of Life (← links)
- 05000219/LER-1982-017, Forwards LER 82-017/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-047-03, /03L-0:on 811005,during Diesel Surveillance Test, Diesel Failed to Automatically Increase Load Above 2,400 Kw. Caused by Operational Deterioration of Governor.Governor Replaced (← links)
- 05000219/LER-1982-020-01, /01T-0:on 820328,MSIV Leak Rate Testing Disclosed Deterioration of Valve Internals on NS03-A & Packing Leak on Outboard Valve NS04-A.Caused Not stated.NS03-A Disassembled & repaired.NS04-A Repacked (← links)
- 05000219/LER-1982-020, Forwards LER 82-020/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-013-03, /03L-0:on 820128,low Voltage Annunciator Relay Setting for Main Station Batteries B & C & Diesel Generator 2 Battery Relay & Setting Found Below Tech Specs Limit. Caused by Annunciation Setpoints Out of Spec (← links)
- 05000219/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-008-03, /03L-0:on 820210,monthly Channel Check of Secondary (Thermocouples) Safety & Relief Valve Position Monitoring Sys Not Performed as Required by Tech Spec. Caused by Lack of Administrative & Procedural Controls (← links)
- 05000219/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-047, Forwards LER 81-047/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-044-03, /03L-0:on 810825,during 10-h Operability Test, Standby Gas Treatment Sys Fan Found to Be Excessively Noisy & Running W/Hot Bearings.Caused by Normal Wear.Bearings Replaced (← links)
- 05000219/LER-1981-044, Forwards LER 81-044/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1993-004-01, :on 930602,discovered Potential Torus Condition Outside Design Basis.Caused by Inadequate Design Info. Documentation Procedures Revised.Torus Calculations to Include Peak Pressure Info (← links)
- 05000219/LER-1990-007, :on 900614,discovered That Numerous Fire Detection Instruments Exceeded Max Allowable Interval for 6-month Operability Test.Caused by Personnel Error. Procedures for Surveillance Tests Changed (← links)
- 05000219/LER-1990-006, :on 900511,average Power Level Exceeded Licensed Limit by Approx 1.64 MW When Cleanup Sys Placed in Svc W/O 7.84 MW Loss Added Into Heat Balance Calculation. Caused by Personnel Error.Procedures Changed (← links)
- 05000219/LER-1990-025, :on 891216,operator Inadvertently Selected Incorrect Control Rod,Then Selected Correct Rod When Error Realized.Second Control Room Operator Will Be Used to Assure That No Signal Failure Will Move Two Rods (← links)
- 05000219/LER-1982-009-03, /03L-0:on 820210,overload Trip Occurred on Standby Gas Treatment Sys Exhaust Fan 1-8.Apparently Caused by Change in Breaker Trip Setpoint.Further Testing Underway (← links)
- 05000219/LER-1982-009, Forwards LER 82-009/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-012-01, /01P-0:on 820226,air Operated Vacuum Breaker V-26-18 Exceeded Allowable Leak Rate.Caused by Improper Alignment of Valve Shaft & Operator Due to Inadequate Maint Instructions.Valve Realigned & Procedures Will Be Revised (← links)
- 05000219/LER-1982-012, Forwards LER 82-012/01P-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-011-03, /03L-0:on 820208,three Hydraulic Snubbers Were Inoperable & Accelerated Surveillance of Tech Spec 4.5.0.3 Was Not Performed.Caused by Component Failure.Snubbers Replaced W/Certified Operable Snubbers (← links)
- 05000219/LER-1982-011, Forwards LER 82-011/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-071-01, /01T-0:on 811231,radwaste Liquid Effluent Monitor Found Inoperable.Proper Surveillance Not Performed.Caused by Personnel Error & Lack of Administrative & Procedural Controls.Control Procedures Written & Parts Replaced (← links)
- 05000219/LER-1981-071, Forwards LER 81-071/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-010-01, /01T-0:on 820218,deluge Sys for Reactor Bldg Elevation 51 Ft Actuated Due to Smoke from Overheated Bearing in Cleanup Sys Auxiliary Pump Motor.Caused by Inadequate Electrical Sealing Techniques (← links)
- 05000219/LER-1982-010, Forwards LER 82-010/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-006-01, /01T-0:on 811203,one Trip Sys in Automatic Depressurization Sys Rendered Inoperable by Removal of Dc Control Power Fuses.Caused by Nonrating of Microswitches Inside IA83-A Replacement.All EMRV Switches Replaced (← links)
- 05000219/LER-1982-007-03, /03L-0:on 820126,main Steam Line High Flow Sensor RE-22H Tripped at Greater Value than Given in Tech Specs. Caused by Instrument Repeatability & Drift.Sensor Reset & Setpoints Lowered (← links)
- 05000219/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-006, Forwards LER 82-006/01T-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-005-03, /03L-0:on 820125,during Load Surveillance Test, Diesel Generator 1-1 Tripped on Engine Fault.Caused by Reduction of Water Inventory in Cooling Sys as Result of Radiator Tube Leak.Leaky Tubes Plugged (← links)
- 05000219/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-002-03, /03L-0:on 820118,installation of Mod Could Have Led to Possible Failure to Maintain Primary Containment Integrity.Change Defeated Automatic Withdrawal Function 3 & 4 TIP Detectors.Caused by Inadequate Safety Review (← links)
- 05000219/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-004-03, /03L-0:on 820121,reactor Bldg Closed Cooling Water Drywell Isolation Valve V-5-167 Failed to Fully Close.Caused by Lack of Stem/Stem Nut Lubrication &/Or Packing Problem. Stem,Stem Nut & Bearing Lubricated & Valve Repacked (← links)
- 05000219/LER-1982-004, Forwards LER 82-004/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1982-003-03, /03L-0:on 820122,containment Spray High Drywell Pressure Indicating Switch IP25B Found to Trip at Value Greater than Tech Spec Limits.Caused by Instrument Repeatability.Switch Reset (← links)
- 05000219/LER-1981-064-03, /03L-0:on 811203,containment Spray High Drywell Pressure Switches IP-15A,IP-15B,IP-15C & IP-15D Found to Trip at Values Greater than Limit.Caused by Instrument Repeatability.Switches Reset (← links)
- 05000219/LER-1981-064, Forwards LER 81-064/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1977-004, Forwards LER 77-004/01T-0 (← links)
- 05000219/LER-1982-001-03, /03L-0:on 820128,during Testing,Containment Spray High Drywell Pressure Indicating Switches IP15A,IP15B & IP15C Found to Trip at Values Greater than Tech Spec Limits. Caused by Instrument Repeatability.Switches Reset (← links)
- 05000219/LER-1982-001, Forwards LER 82-001/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-072-03, /03L-0:on 811229,core Spray Sys I Parallel Isolation Valve V-20-15 Became Inoperable in Partially Open Position.Caused by High Motor Current Drawn When Valve Close Signal Inadvertently Intiated During Valve Stroking (← links)
- 05000219/LER-1981-072, Forwards LER 81-072/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-070-03, /03L-0:on 811231,isolation Condenser Isolation Pipe Break Sensor IB11A1 Tripped Above Tech Spec Limit. Caused by Instrument Repeatability.Setpoint Lowered.Switches Will Be Replaced During Future Refueling Outage (← links)
- 05000219/LER-1981-070, Forwards LER 81-070/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-069-03, /03L-0:on 811230,during Surveillance Testing,Core Spray High Drywell Pressure Switches RV-46A,RV-46B & RV-46D Tripped.Caused by Instrument Repeatability.Switches Reset. Setpoint Changed to Reflect Inherent Design Error (← links)
- 05000219/LER-1981-069, Forwards LER 81-069/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-067-03, /03L-0:on 811220,during Maint Testing,Scram Pilot Solenoid Valve 118 (for Control Rod Drive 14-23) Failed When Rod Was Individually Scrammed.No Plausible Cause Could Be Postulated.All Scram Solenoids Will Be Verified Operabl (← links)
- 05000219/LER-1981-067, Forwards LER 81-067/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-068-03, /03L-0:on 811218,reactor Triple Low Water Level Indicator Switch RE18A Tripped at Monometer Reading Exceeding Tech Spec Limit.Caused by Instrument Drift.Switch Reset.Setpoint Sensors Will Be Replaced (← links)
- 05000219/LER-1981-068, Forwards LER 81-068/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-066-03, /03L-0:on 811201,during Surveillance Testing,Main Steam Line High Flow Sensors RE22C,RE22E & RE22F Tripped at Values Greater than Tech Specs Limit.Caused by Instrument Repeatability & Drift.Sensors Reset (← links)
- 05000219/LER-1981-066, Forwards LER 81-066/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-063-03, /03L-0:on 811119,during Surveillance Testing, Isolation Condenser Valve V-14-30 Failed to Close.Caused by Torque Switch Setting & Packing Gland Tightness.Torque Switch Setting Corrected (← links)
- 05000219/LER-1981-063, Forwards LER 81-063/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-060-03, /03L-0:on 811121,MAPLHGR Increased Beyond Tech Specs Limits.Caused by Personnel Error & Procedural Inadequacies.Core Power Reduced W/Flow & Appropriate Rod Groups Inserted One Notch (← links)
- 05000219/LER-1981-060, Forwards LER 81-060/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-062-03, /03L-0:on 811125,core Spray Hi Drywell Pressure Switch RV46C Tripped in Excess of Tech Spec Limit.Caused by Sensor Repeatability.Sensor Recalibr (← links)
- 05000219/LER-1981-062, Forwards LER 81-062/03L-0.Detailed Event Analysis Encl (← links)
- 05000219/LER-1981-065, Forwards LER 81-065/01T-0.Detailed Event Analysis Encl (← links)
- ML090970735 (redirect page) (← links)
- Information Notice 2009-10, Transformer Failures - Recent Operating Experience (← links)
- ML15252A579 (← links)
- ML13339A902 (← links)
- ML13302C191 (← links)
- ML13163A410 (← links)
- ML13045A854 (← links)
- ML12340A826 (← links)
- ML12340A803 (← links)
- ML12340A780 (← links)
- ML12334A512 (← links)
- ML12318A373 (← links)
- ML12299A427 (← links)
- ML12290A246 (← links)
- ML12283A413 (← links)
- ML12276A359 (← links)
- ML12275A503 (← links)
- ML12265A249 (← links)
- ML12184A236 (← links)
- ML12172A020 (← links)
- ML12030A251 (← links)
- ML12030A235 (← links)
- ML11361A396 (← links)
- ML11361A095 (← links)
- ML11356A135 (← links)
- ML11355A186 (← links)
- ML11353A071 (← links)
- ML11353A040 (← links)
- ML113530071 (← links)
- ML11349A087 (← links)
- ML11348A143 (← links)
- ML11348A096 (← links)
- ML11348A092 (← links)
- ML11346A545 (← links)
- ML18222A541 (← links)
- ML18227A338 (← links)
- RA-17-072, License Amendment Request - Proposed Defueled Technical Specifications and Revised License Conditions for Permanently Defueled Condition (← links)
- 05000219/LER-2009-006, Regarding EDG 1 Inoperable Due to Failure of Its Output Breaker to Close (← links)
- 05000219/LER-2009-005, Regarding Reactor Scram Following a Transmission Line Lightning Strike (← links)
- 05000219/LER-2009-004, Regarding Establishment of Secondary Containment Boundary Contrary to Technical Specification Requirements (← links)
- 05000219/LER-2009-003, Regarding Manual Reactor Shutdown Caused by Loss of Cooling to the Main Transformer (← links)
- 05000219/LER-2009-002, Failure to Take the Appropriate Tech Spec Action When Primary Containment Isolation Valve Became Inoperable (← links)