Pages that link to "05000333/LER-2007-001, Safety Relief Valve Setpoints Outside of Allowable Tolerances"
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The following pages link to 05000333/LER-2007-001, Safety Relief Valve Setpoints Outside of Allowable Tolerances:
Displayed 4 items.
- 05000333/LER-2007-001 (redirect page) (← links)
- 05000529/LER-2007-004 (← links)
- 05000315/LER-2007-002 (← links)
- 05000413/LER-2007-004 (← links)
- 05000346/LER-2007-001 (← links)
- 05000335/LER-2007-003 (← links)
- 05000333/LER-2001-005 (← links)
- 05000333/LER-2001-004 (← links)
- 05000333/LER-2001-003 (← links)
- 05000333/LER-2001-002 (← links)
- 05000333/LER-2001-001 (← links)
- 05000309/LER-2007-001 (← links)
- 05000266/LER-2007-002 (← links)
- IR 05000333/2007005 (← links)
- 05000333/LER-1993-018, Forwards Rev 1 to LER 93-018,identifying That Increase in Min Carbon Dioxide Storage Tank Level Specified in TS Required to Provide Single Full Discharge of Carbon Dioxide Into North Emergency Switchgear Room (← links)
- 05000333/LER-1989-012, Advises That Suppl to LER 89-012-00 Re Postulated Fault 4 Kv Bus Fault Will Be Submitted by 900904 (← links)
- 05000333/LER-1982-025, Forwards LER 82-025/03L-0 (← links)
- 05000333/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000333/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000333/LER-1981-082, Forwards LER 81-082/03X-1 (← links)
- 05000333/LER-1981-071, Forwards LER 81-071/03X-1 (← links)
- 05000333/LER-1981-059, Forwards LER 81-059/03X-1 (← links)
- 05000333/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000333/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000333/LER-1981-011, Forwards LER 81-011/03X-1 (← links)
- 05000333/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000333/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000333/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000333/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000333/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000333/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000333/LER-1982-060, Forwards LER 82-060/04T-0 (← links)
- 05000333/LER-1983-008, Forwards LER 83-008/01T-0 (← links)
- 05000333/LER-1993-027, Reissues LER-93-027 Re Fire Protection Sys Functional Test Procedure Weaknesses Due to Incorrect Date on Block 7 of Form NRC 366.Rept Text Remains as Issued on 940120 (← links)
- 05000333/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000333/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000333/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000333/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000333/LER-1982-058, Forwards LER 82-058/04T-0 (← links)
- 05000333/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000333/LER-1982-034, Forwards LER 82-034/03X-1 (← links)
- 05000333/LER-1981-033, Forwards LER 81-033/03L-0 (← links)
- 05000333/LER-1981-066, Forwards LER 81-066/03X-1 (← links)
- 05000333/LER-1982-040, Forwards LER 82-040/04T-0 (← links)
- 05000333/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000333/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000333/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000333/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000333/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000333/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000333/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000333/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000333/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000333/LER-1982-018, Forwards LER 82-018/03X-1 (← links)
- 05000333/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000333/LER-1983-012, Forwards LER 83-012/04T-0 (← links)
- 05000333/LER-1983-011, Forwards LER 83-011/01T-0 (← links)
- 05000333/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000333/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000333/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000333/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000333/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000333/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000333/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000333/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000333/LER-1978-112, Forwards LER 78-112/03L-0 (← links)
- 05000333/LER-1983-042, Submits Rev to 831013 Cover Ltr & Forwards LER 83-042/03L-1. Original Ltr Erroneously Listed Rept as 83-048 & LER Had Error in Reporting Date (← links)
- 05000333/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000333/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000333/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000333/LER-1981-039, Forwards LER 81-039/03X-1 (← links)
- 05000333/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000333/LER-1991-009, Confirms 1 Wk Extension Until 910815 for Submittal of LER 91-009-00 Re RHR Pipe Support Discrepancies (← links)
- 05000333/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000333/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000333/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000333/LER-1983-016, Forwards Updated LER 83-016/03L-1 (← links)
- 05000333/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000333/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000333/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000333/LER-1982-004, Forwards LER 82-004/03X-1 (← links)
- 05000333/LER-1978-105, Forwards LER 78-105/03L-0 (← links)
- 05000333/LER-1978-056, Forwards LER 78-056/03L-1 (← links)
- 05000333/LER-1978-082, Forwards LER 78-082/03L-0 (← links)
- 05000333/LER-1978-075, Forwards LER 78-075/03L-1 (← links)
- 05000333/LER-1982-051, Forwards Updated LER 82-051/03L-1 (← links)
- 05000333/LER-1997-011, Forwards LER 97-011-00 Re Invalid ESF Actuation & Failure to Perform TS Required Acltions While Performing Troubleshooting Activities (← links)
- 05000333/LER-1997-010, Forwards LER 97-010-00 Re Surveillance Testing of Pressure Suppression Chamber.No Commitments Contained in Rept (← links)
- 05000333/LER-1997-013, Forwards LER 97-013-00 Re High Pressure Coolant Injection Sys Which Was Declared Inoperable Due to Instrument Malfunction During Surveillance Testing.No Commitments Made (← links)
- 05000333/LER-1982-028, Forwards Updated LER 82-028/03X-1 (← links)
- 05000333/LER-1997-008, Forwards LER 97-008-00 Re Inoperability of Both Trains of SGTS Due to Flow Restriction in Discharge Line (← links)
- 05000333/LER-1997-009, Forwards LER 97-009-00 Re Exceeded Quarterly Calibr Frequency for Radwaste Bldg Exhaust Radiation Monitor.No Commitments Contained in Rept (← links)
- 05000333/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000333/LER-2024-002, Reactor Protection System Electric Power Monitoring System Trip Caused Primary Containment Isolation (← links)
- 05000333/LER-2024-001, EDG Lube Oil Check Valve Bonnet Cap Leak Due to Failed Gasket (← links)
- 05000333/LER-2024-001-01, EDG Lube Oil Check Valve Bonnet Cap Leak Due to Failed Gasket (← links)
- 05000333/LER-2023-004, For James A. Ftizpatrick Nuclear Power Plant, Misaligned Spacer Prevented Tie Breaker Closing Coil Armature Operation on a Magne-Blast for EDG a Subsystem (← links)
- 05000333/LER-2022-003-02, Safety Relief Valves Lift Setpoint Found Out of Tolerance Low (← links)
- 05000333/LER-2023-002-01, Reactor Protection System Electric Power Monitoring System Trip Caused Primary Containment Isolation (← links)
- 05000333/LER-2023-003, Emergency Diesel Generator Fuel Oil Supply Procedure Error B Subsystem (← links)
- 05000333/LER-2023-002, Reactor Protection System Electric Power Monitoring System Trip Caused Primary Containment Isolation (← links)
- 05000333/LER-2023-001, Primary Containment Isolation System Isolation Due to Initiation of Main Condenser Fire Protection Foam System (← links)
- 05000333/LER-2022-002-01, Mode Switch Failed to Bypass Low Main Steam Line in Mode 2 Resulting in MSIV and RPS System Actuation (← links)
- 05000333/LER-2021-001-01, Inadequate Protection Devices for DC Motor Field Shunt Cables Through Separate Fire Areas (← links)
- 05000333/LER-2022-003, Safety Relief Valves Lift Setpoint Found Out of Tolerance Low (← links)
- 05000333/LER-2022-002, Mode Switch Failed to Bypass Low Main Steam Line in Mode 2 Resulting in MSIV and RPS System Actuation (← links)
- 05000333/LER-2022-001, Exhaust Drain Pot Line Filled with Water Up to HPCI Turbine Due to Relay Failure (← links)
- 05000333/LER-2021-003, Air Solenoid Valve Condition Results in Main Steam Isolation Valve (MSIV) Fast Closure Test Failure (← links)
- 05000333/LER-2021-002, Automatic High Pressure Coolant Injection (HPCI) System Function Prevented by Control Circuit Relay Failure (← links)
- 05000333/LER-2021-001, Inadequate Protection Devices for DC Motor Field Shunt Cables Through Separate Fire Areas (← links)
- 05000333/LER-2020-003-01, High Pressure Coolant Injection Inoperable Due to Oil Leak (← links)
- 05000333/LER-1998-005, :on 980529,declared HPCI Inoperable Due to Observed Lower than Normal Output Signal on Flow Controller. Replaced Flow Controller & Declared HPCI Sys Operable on 980530 (← links)
- 05000333/LER-1988-014, :on 881205,insp of 4,160 Volt Ac Circuit Breakers Revealed Possible Common Cause Failure as Result of Procedural Deficiency by Vendor Performing Circuit Breaker Overhaul.Circuit Breaker Repaired (← links)
- 05000333/LER-1989-002-01, :on 890302,HPCI Sys Declared Inoperable While Required by Tech Spec 3.5.C.1.Caused by Wiring Error That Existed Since Plant Const.Wiring Error Corrected & Stop Valve Opening Time Adjusted (← links)
- 05000333/LER-1998-003, :on 980429,loss of Redundant ECCS Function (HPCI & ADS) Required for Small Break LOCA Occurred.Caused by Design Condition & Assumed Single Failure.Modified Power Circuit for Cable by Addition of Two in-line Fuses (← links)
- 05000333/LER-1998-004, :on 980501,initiated Manual Reactor Scram Due to Multiple Control Rod Drift Indications in Cr.Implemented Preventive Maint Evaluation for Control Rods & Similar Power Supplies to Determine Appropriate Preventive Maint Tasks (← links)
- 05000333/LER-1989-014, :on 890817,HPCI Pump Turbine Declared Inoperable Due to Water in Lubricating Oil.Caused by Leaking Steam Supply Isolation Valve.Turbine Oil Sump Drained & Refilled W/New Oil (← links)
- 05000333/LER-1989-001-01, :on 890228,ECCS Pumps Made Inoperable After Loose Motor Leads Terminal Box Discovered.Cause Apparently Due to age-related Hardening of Gasket.Bolts Replaced. Revs for Periodic Insp to Be Implemented (← links)
- 05000333/LER-1989-006-01, :on 890419,standby Liquid Control Sys Declared Inoperable When Pump Discharge Accumulator Nitrogen Precharge Was 0 Psig.Caused by Slow Leak in Charging Connector Spring Loaded Valve.Bladder Repaired (← links)
- 05000333/LER-1989-013, :on 890803,two Solenoid Operated Group II Primary Containment Purge Sys Isolation Valves Closed.Caused by Technician Allowance of Jumper Wire to Contact Grounded Surface.Caution Statement Re Grounding Written (← links)
- 05000333/LER-1989-005-01, :on 890412,HPCI Sys Made Inoperable to Find & Correct Grounded Electrical Circuit.Caused by Accumulation of Conductive Rust/Corrosion Products.Cleaning Provided Satisfactory Repair & Technical Manual Updated (← links)
- 05000333/LER-1989-011-01, :on 890531,plugging of Non safety-related Floor Drains in Emergency Diesel Generator Rooms Performed W/O Prior Evaluation Required by 10CFR50.59.Cause Not Stated. Mod of Control Procedures Revised (← links)
- 05000333/LER-1989-010-01, :on 890519,determined That Design of Certain Air Conditioning Equipment Protective Trips Not Consistent W/Design Basis.Caused by Design Deficiency & Inadequate Review by Vendor.Equipment Modified (← links)
- 05000333/LER-1989-009-01, :on 890518,determined Containment Drywell to Suppression Chamber Differential Pressure & Suppression Chamber Level Out of Limits.Caused by Personnel Error. Personnel Involved Counseled (← links)
- 05000333/LER-1989-008-01, :on 890517,surveillance Testing of HPCI & RCIC Auto Isolation Sys Time Delay Devices Not Completed as Required by Tech Spec Table 4.2-2.Caused by Procedure Deficiencies.Tech Spec Changes Submitted (← links)
- 05000333/LER-1988-009, :on 881021,personnel Found Part of One Unit Cooler in Reactor Bldg Ventilation Sys Blank Flanged Out of Svc.Caused by Procedure Deficiencies.Unit Coolers Restored to Operable Status by Correcting Deficiencies (← links)
- 05000333/LER-1989-004-01, :on 890309,design Deficiency Potentially Affected Divisions of safety-related Sys Due to Valve Failing Closed on Loss of Air.Caused by Plant Design & Const Error.Temp Control Valve Bypass Valves Opened (← links)
- 05000333/LER-1989-007-01, :on 890509,surveillance of Fire Barrier Penetrations Missed Due to Misinterpretation of Barriers. Fire Watch Established & Required Surveillance Completed & Ref Manual Revised (← links)
- 05000333/LER-1989-003, :on 890306,reactor Safety Relief Valve Inadvertently Opened for 5 During Surveillance.Caused by Personnel Error.Operators Counseled on Need to Stay Alert During Familiar Operations (← links)
- 05000333/LER-1987-010, :on 870723,HPCI Inoperable Due to Low Auxiliary Oil Pump Discharge Pressure.Caused by Failure of Inboard Bearing in Auxiliary Oil Pump.Addl HPCI Turbine Parameters Will Be Monitored,Recorded & Trended (← links)
- 05000333/LER-1987-011, :on 870728,electrical Conduit Fire Barriers Not Sealed W/Three H Fire Rated Seal.Caused by Use of Incomplete List of Fire Barrier Penetrations.Three H Fire Seals in Unsealed Penetrations Installed (← links)
- 05000333/LER-1987-018, :on 871108,reactor Tripped from High Neutron Flux Due to Erratic Operation of Reactor Water Recirculation Pump Speed Controller.Caused by Malfunction in Pump Speed Controller Switch.Controller Replaced (← links)
- 05000333/LER-1998-006, :on 980708,missed Pressure Testing of Pressure Isolation Valves Was Noted.Caused by Inadequate Implementation of Pressure Testing Requirements.Valves Were Pressure Tested & Test Results Were Adequate (← links)
- 05000333/LER-1986-013, :on 860703,reactor Scram Occurred Due to 345 Kv Bus Test Block Failure.Caused by Stress Corrosion Cracking. PK-2 Test Blocks Inspected & Replaced (← links)
- 05000333/LER-1987-017, :on 870924,reactor Scrammed on Low Water Level Following Reactor Feed Pump a Trip on High Vibration.Caused by Defective Vibration Detector Shaft Rider.Shaft Rider & Feed Pump a Turbine Inboard Bearing Replaced (← links)
- 05000333/LER-1987-001, :on 870118,valves on Six Primary Containment Penetrations Found W/Leakage Exceeding Tech Specs Limits. Cause of Failure Attributed to Wear.Valve Stem Repacked & Seating Surface Reconditioned (← links)
- 05000333/LER-1987-015, :on 870916,suppression Chamber Water Level Switch Found to Have Exceeded Operating Tech Spec Table 3.2-2 Limit.Caused by Matl Deposited on Switch Internal Float Mechanism.Mechanism Cleaned (← links)
- 05000333/LER-1987-016, :on 870916,w/plant Operating at 100% Power, Automatic Isolation of RCIC Sys Occurred.Caused by Failure of Operator to Follow Prescribed Sequence of Surveillance Test Procedure.Operator Counseled (← links)
- 05000333/LER-1987-014, :on 870912,automatic Initiation of 4 Kv Emergency Bus Degraded Voltage Protection Sys Occurred. Caused by Sys Design.Operating Procedure Changed to Require Performance of Load Transfer by Two Operators (← links)
- 05000333/LER-1988-004, :on 880523,vendor Informed Util That Three of Five Safety Relief Valves Removed for Test During Jan 1988 Maint Outage Did Not Actuate within Allowed Specs.Caused by Pilot Valve Disc & Seat Bonding or Leakage (← links)
- 05000333/LER-1987-009, :on 870611,automatic Initiation of Emergency Bus Degraded Voltage Protection Sys Occurred.Caused by Personnel Error.Steps Taken to Increase Operator Awareness of Degraded Voltage Sys Setpoints (← links)
- 05000333/LER-1987-008, :on 870610,w/plant at 100% Power,Reactor Feed Pump Tripped & Low Level Scram Occurred,Due to Failed Pump Seal.Possibly Caused by Suction Pressure Transient.Seal Replaced & Speed Control Sys Will Be Modified (← links)
- 05000333/LER-1987-019, :on 871207,review of Plant Procedures Indicated That Required Test of Standby Gas Treatment Sys Not Performed.Caused by Tech Spec Misinterpretation.Surveillance Test Requirement Will Be Clarified (← links)
- 05000333/LER-1987-004, :During 1987 Refuel Outage,Three of Six Target Rock Safety/Relief Valves Removed for Testing Found W/ Setpoint Values Outside Allowable Tolerance.Probable Cause Due to Sticking of Pilot Valve Disc (← links)
- 05000333/LER-1999-008-01, :on 990910,HPCI Sys Was Declared Inoperable Due to Apparent Failure of Master Trip Unit (MTU) within HPCI Sys Automatice Isolation Logic.Subject MTU Was Replaced & HPCI Sys Was Returned to Operable Status.With (← links)
- 05000333/LER-1997-005, :on 970525,manual Reactor Scram Occurred Due to Failure of Number 3 Main Tcv.Caused by Damaged Valve Spring Can Coupling.Replaced Valve Spring Can Coupling Bolt of Four TCVs & Four CIVs & Completed Review (← links)
- 05000333/LER-1998-015-02, Forwards LER 98-015-02 Re Logic Sys Functional Test Inadequacies,Per 10CFR50.73(A)(2)(i)(B).Rept Revised to Reflect Scheduled Completion Date for Corrective Action 3 of Jan 15, 2000 & Updates Status of Other C/As as Complete (← links)
- 05000333/LER-1999-007-01, :on 990809,both a & B Division of CS Pump Start Interlock Relays Exceeded Values Required by Ts.Caused by Inappropriate as-left Calibr Tolerance for Time Delay Relays.Relays Were Immediately Recalibr.With (← links)
- 05000333/LER-1997-008-01, :on 970806,both Trains of SGTS Were Declared Inoperable Due to Flow Restriction in Discharge Line. Developed Periodic Surveillance That Can Adequately Detect Blockage in Drain Line (← links)
- 05000333/LER-1998-002, :on 980311,determined That Two of Four SRVs Were Outside Tolerance Allowed by TS SR 4.6.E.Caused by Corrosion Bonding Between SRV Pilot Disc & Seat.Removed Four Pilot Assemblies & Replaced W/Steam Certified Assemblies (← links)
- 05000333/LER-1986-017, :on 860930,seven Inadvertent Reactor Scrams Occurred from 860930-1004.Caused by Dirty or Wet LPRM 20-21A Connector & Broken Intermediate Range Monitor G Connector. Connectors Dried,Cleaned & Repaired (← links)
- 05000333/LER-1987-006, :on 870407,high Drywell Pressure Automatic Actuation of Core Spray Sys & Emergency Diesel Generators Occurred.Caused by Procedure deficiency.F-ST-39F Will Be Revised Prior to Next Scheduled Performance (← links)
- 05000333/LER-1987-005, :on 870401,during Operational Pressure Test of Reactor Vessel,Automatic Actuation of Primary Containment Isolation Sys Occurred.Caused by Differential Pressure Instrument Valve Packing Leaks.Packing Secured (← links)
- 05000333/LER-1986-018, :on 860829,circuit Breaker for RHR Pump a Failed to Recharge,Creating Potential Common Mode Failure. Caused by Loosening of Bolts Due to Inadequate Thread & Equipment Vibration.Longer Bolts Installed (← links)
- 05000333/LER-1987-007, :on 870409,during Pipe Support Program Insp, Reactor Vessel Head Vent Piping Found Inoperable & Pipe Anchor Installed But Not Welded to Piping Per Plant Drawings.Caused by Const Personnel Error (← links)
- 05000333/LER-1986-019, :on 861112,RCIC Sys Automatic Div I Isolation Occurred.Caused by Technician Error.Technicians Cautioned on Importance of Checking Test Equipment Readiness Before Commencement of Activities (← links)
- 05000333/LER-1997-009-01, :on 970905,discovered Radwaste Bldg Exhaust Monitor Instrument Channel Calibr Test,Required Ts.Caused by Personnel Error.Comprehensive Root Cause Analysis Completed to Review & Identified Human Performance Considerations (← links)
- 05000333/LER-1986-012, :on 860525,approx One Gallon of Water from Fire Protection Sys Drained Onto Battery Motor Control Ctr During Performance of Surveillance Test.Caused by Not Routing Drain Lines to Floor Drain Sys (← links)
- 05000333/LER-1990-008, :on 900315,extended Time Interval for Calculation of Reactor Coolant Leak Rate Was Discovered. Caused by Personnel Error.Procedure for Obtaining Data to Calculate Reactor Coolant Leak Rate Has Been Standardized (← links)
- 05000333/LER-1990-008-01, Forwards LER 90-008-01,revising Corrective Action Section as Reported in LER 90-008-00.Corrective Action Does Not Provide Human Factor Issues Pertinent to Cause of Event.Issues Related to TS Amend Are Being Reviewed (← links)
- 05000333/LER-1986-014, :on 860903,HPCI Rendered Inoperable When Circuit Breaker for HPCI Torus Suction Valve Operator 23 MOV-58 Tripped on Open Signal from Control Room.Caused by Failure of Actuator Motor on Overheating (← links)
- 05000333/LER-1986-015, :on 860904,RCIC Automatic Isolation Received on Spurious High Steam Line Flow Signal.Caused by Air Trapped in Flow Transmitter Sensing Line.Flow Transmitter Revented & Returned to Svc (← links)
- 05000333/LER-1986-016, :on 860909,incorrect Min Critical Power Ratios Calculated for 860827-0909 Due to Error in Process Computer Data Banks.Caused by Personnel Error.Gexl Correlation Values Loaded in CP Array on 860908 (← links)
- 05000333/LER-1986-002, :on 860303,Tech Spec 4.12.A.1.d Surveillance Test for Diesel Fire Pump Battery Specific Gravity Tests Not Performed within Required Test Frequency.Caused by Weak Administrative Controls.Test Performed (← links)
- 05000333/LER-1999-006-01, :on 990609,LCPI Mode of RHR Sys Was Inoperable. Caused by Loss of Automatic Startup Capability of RHR Pumps. Repaired Defective Fuse Contact & Conducted Equipment Failure Evaluation.With (← links)
- 05000333/LER-1999-005-01, :on 990506,missed Surveillance Test Was Noted. Caused by Inoperable Containment Hydrogen/Oxygen Analyzer. Counseled Personnel Involved & Revised Procedures.With (← links)
- 05000333/LER-1986-021, :on 861223,HPCI & Three Primary Containment Isolation Sys Valves Inoperable.Caused by Water Spray Onto Battery Motor Control Ctr (Bmcc).Bmcc Dried,Tested & Energized.Bmcc & HPCI Declared Operable (← links)
- 05000333/LER-1986-020, :on 861221,approx 100 Gallons Radioactive Liquid Discharged W/O Proper Sampling & Authorization for Release.Caused by Personnel Error.Key Necessary for Discharge Will Be Issued Only by Supervisor (← links)
- 05000333/LER-1999-002, :on 990113,discovered That Suppression Chamber RB Vacuum Breaker Isolation Valve Differential Pressure Switches Were Out of Tolerance Due to Incorrect Assumption in Calculation.Calibr Pressure Switches.With (← links)
- 05000333/LER-1986-011, :on 860515,reactor Recirculation Sys Discharge Bypass Valve Failed to Operate Due to Drywell Floor Drain Leakage from Unidentified Source.Caused by Contact Between Limitorque Declutch Lever & Equipment (← links)
- 05000333/LER-1986-003, :on 860312,HPCI Outboard Steam Supply Valve Bypass Valve 23-MOV-60 Failed to Operate Properly During Surveillance Testing.Caused by Corrosion of Clutch Mechanism.Parts Replaced & Drive Shaft Cleaned (← links)
- 05000333/LER-1999-001, :on 990114,incorrect EDG line-up During Fire Placed Plant in Condition Outside Design Basis.Caused by Inadequate Procedures & Insufficient Operator Training. Revised EDG Operating & Surveillance Test Procedures (← links)
- 05000333/LER-1999-001-01, Forwards LER 99-001-01 Re Incorrect EDG line-up During Fire Placing Plant in Outside Design Basis.Suppl Contains Results of Completed Root Cause Evaluations & Subsequent Corrective Actions Taken.Rept Contains No Commitments (← links)
- 05000333/LER-1986-010, :on 860404,full Scram Occurred While Performing Main Turbine Stop Valve Limit Switch Instrument Functional Test.Cause Unknown.Affected Components Replaced & Sys Tested (← links)
- 05000333/LER-1998-001, :on 980128,invalid Isolations of Reactor Building Ventilation & Associated Actions,Occurred.Cause Not Determined.Revised Procedure ODSO-34 to Ensure That Prior Independent Reviews of TS Performed (← links)
- 05000333/LER-1997-012, :on 971214,drywall Personnel Airlock Outer Door Seals Local Leak Rate Test Was Not Properly Performed.Caused by Mechanic Installing Incorrect Label.Removed Incorrect Label & Installing Correct Label (← links)
- 05000333/LER-1997-001, :on 970123,manual Reactor Scram Occurred Due to Fouling of Circulating Water Sys Traveling Screens.Caused by Potential Loss of CWS Intake Water Due to Restriction of Flow Through Three CWS Traveling Screens.Procedures Revised (← links)
- 05000333/LER-1997-011-01, :on 971024,invalid ESF Actuation & Failure to Perform TS Required Actions Occurred While Performing Required Actions While Troubleshooting Activities.Restored HPCI Sys to Normal IAW Plant Procedures (← links)
- 05000333/LER-1997-010-01, :on 971021,determined That Surveillance Testing of Primary Containment Pressure Chamber,Drywell Vacuum Breakers Coincident W/Loca.Caused by Inadequate Procedures Reviews.Procedures Revised (← links)
- 05000333/LER-1997-013-01, :on 971216,high Pressure Coolant Sys Was Declared Inoperable.Caused by Instrument Malfunction During Surveillance Testing.Completed Repair Activities to Correct Adjustments to Master Trip Unit (← links)
- 05000333/LER-1997-012-01, :on 971214,drywell Personnel Airlock Outer Door Seals Local Leak Rate Test Was Not Properly Performed.Caused by Inattention to Detail on Part of Mechanic Who Installed Label.Removed Incorrect Label (← links)
- 05000333/LER-1998-013, :on 981117,containment Leakage Rate Exceeds Authorized Limits,Was Determined.Caused by Valve Sealing Failure.Failed Valves Repaired & Retested Satisfactorily Prior to Plant Startup (← links)
- 05000333/LER-1998-014, :on 981117,trip of RPS Power Supply & ESF Actuation Occurred.Caused by Relay Failure.Relay Was Replaced & Motor Was Restarted Satisfactorily.With (← links)
- 05000333/LER-1999-003-01, Forwards LER 99-003-01 Re SRV Setpoint Drift.Revised Rept Is Being Submitted to Change Commitment Due Date Made in Original LER (← links)
- 05000333/LER-1998-012, :on 981104,failure to Meet Primary Containment Leakage Rate Testing Program Requirements Was Noted.Caused by Deficient Test Procedures.Leak Rate Test Procedures Were Revised & Testing Was Completed.With (← links)
- 05000333/LER-1997-006-01, :on 970616,discovered That Instrumentation Isolation Trip Function Surveillance Test Had Not Been Performed at Required Frequency.Caused by Personnel Error. Completed Surveillance Test (← links)
- 05000333/LER-1988-011, :on 881031,trip of Operating 115 Kv Offsite Reserve Power Line Resulted in Short Loss of Alternating Current Power.Caused by Momentary Fault on 115 Kv Line.Sys Restored to Normal (← links)
- 05000333/LER-1999-004-01, :on 990403,two Electrical Leads in 09-30 Panel in Relay Room Were Found Unlanded.Caused by Inattention to Detail & Inadequate Process to Ensure Complete Protective Tag.Performed Extent of Condition Walkdowns.With (← links)
- 05000333/LER-1987-020, :on 871209,reactor Trip from Low Water Level Actuation Inadvertently Initiated During Surveillance Testing.Caused by Instrument & Controls Technician Error. Technician Counseled & Valves Replaced (← links)
- 05000333/LER-2020-003, High Pressure Coolant Injection Inoperable Due to Oil Leak (← links)
- 05000333/LER-1988-004-01, :on 880523,reactor Safety/Relief Valve Setpoint Drift Occurred.Cause Unkown.Vendor Test Rept W/Complete Evaluation of Drift & Corrective Action Taken Expected to Be Completed by Aug 1988 (← links)
- 05000333/LER-1986-004, :on 860315,during Cold Shutdown,Full Scram Received While Testing Backup Scram Relays.Caused by Placing Jumper Across Trip Sys Scram Relay B Contacts While Trip Sys a Tripped.Procedure Revised (← links)
- 05000333/LER-1998-011, :on 980929,failure to Meet Drywell Continuous Atmosphere Monitoring Sys TS Surveillance Test Requirements Were Noted.Caused by Deficient Tp.Declared Both Channels of CAM Sys Inoperable.With (← links)
- 05000333/LER-1988-008, :on 880901,during Performance of 1988 Refuel Outage,Excessive Leakage of Primary Containment Isolation Valves Noted.Caused by Wear.Leaking Valves Replaced.W/ (← links)
- 05000333/LER-1986-001, :on 860302,at 100% Power,Flow Bias Functional Test Discovered Not Performed Since 850609.Caused by Inadvertent Schedule Ommission While Shifting Between Run & Not Run Mode Testing.Audit Performed (← links)
- 05000333/LER-1988-001, :on 880310,HPCI Turbine Steam Supply Valve Failed to Open in Response to Open Signal.Caused by Procedures Not Including Evaluation of Relubrication of Threads of Valve Stem & Stem Nut (← links)
- 05000333/LER-1988-007, :on 880816,pipe Supports for Rhr/Lpci Pump Min Flow Lines Not Installed Follwing Maint.Caused by Failure to Properly Implement Written Procedures Required by Tech Spec 6.8.A.Supports Installed (← links)
- 05000333/LER-1988-003, :on 880418,reactor Protection Sys Motor Generator (MG) a Tripped When MG Drive Motor Overload Protective Relay Failed.Caused by Failure of Relay.Relay Replaced (← links)
- 05000333/LER-1985-024, :on 850913,since Sys Installation & Startup in May 1985,oxygen Analyzers a & B Out of Svc Numerous Times Due to Sensor Software & Procedural Problems.Vendor Will Help Resolve Problems During Outage (← links)
- 05000333/LER-1998-010, :on 980813,primary Containment Electrical Penetration Was Noted Inoperable Under Postulated Conditions.Caused by Inadequate Plant Design.Added Second Primary Overcurrent Protective Device.With (← links)
- 05000333/LER-1998-009, :on 980807,error in Exclusion Region of Power Flow Map Was Noted.Caused by Lack of Explicit Procedure on How to Perform Analysis.Revised Vendor Procedure That Is Used to Produce Option 1-D Exclusion Region.With (← links)
- 05000333/LER-1998-007, :on 980731,HPCI Was Declared Inoperable Due to DC Ground on B Station Battery Bus.Caused by Inadequate Managerial Methods.Initiated Work Request to Inspect,Clean Meggar & Return Bus to Operable Condition (← links)
- 05000333/LER-1998-008, :on 980803,automatic Reactor Scram Occurred Due to Low RPV Water Level Following Degradation in Feedwater Flow.Completed Post Transient Evaluation Prior to Startup & Correcting Filling & Venting Procedure (← links)
- 05000333/LER-1988-006-02, :on 880627,daily Surveillance & Instrument Check Drywell Equipment & Floor Drain Leakage Rates Not Calculated or Recorded,As Required by Tech Spec 4.6.D.Caused by Miscommunication.Surveillance Performed (← links)
- 05000333/LER-1988-002, :on 880310,RCIC Made Inoperable for Approx 1 Minute Due to Automatic Closure of Steam Supply Valve While HPCI Inoperable.Caused by Failure to Follow Procedures.Rcic Restored to Svc (← links)
- 05000333/LER-1988-001-01, :on 880310,HPCI Turbine Steam Supply Valve 23-MOV-14 Failed to Open During Surveillance Testing.Caused by Destruction of Commutator in Motor Due to Excessive Current.Failed Motor Replaced (← links)
- 05000333/LER-1978-087-04, /04T-0 on 781018:Environ Radiological Monitoring Sample of Periphyton Samples Pci/Gm(Wet)Does Not Meet Subj Facil Tech Spec Append B,Paragraph 5.6.2.6 (← links)
- 05000333/LER-1987-021, :on 871213,RWCU Sys Isolated Due to Failure of Pipe Flange to Seat Gasket.Caused by Inadequate Pipe Flange Bolt Torquing Procedure.Procedure Changed to Include Secondary Effects (← links)
- 05000333/LER-1987-022, :on 871210,portion of Surveillance Test Not Performed at Required Frequency Due to Operator Oversight. Operators Involved Counselled (← links)
- 05000333/LER-1992-039, :on 920721,SGTS Found Running in an Abnormal Lineup.Caused by Personnel Error.Shift Turnover Procedure Will Be Revised to Specifically Require Panel Walkdown & Operating Shifts Will Be Trained by 920915 (← links)
- 05000333/LER-1992-038, :on 920716,components & Piping Identified That Had Not Been Tested,Per ASME Boiler & Pressure Vessel Code. Caused by Inadequacies of ISI Test Program.Working Group Will Develop Pressure Test Program by 921231 (← links)
- 05000333/LER-1986-009, :on 860328,sample of Reactor Coolant Taken Late During Startup,Contrary to Tech Spec 4.6.C.1.c.Caused by Procedural Inadequacy & Personnel Error.Technicians Will Be Required to Review Sampling Requirements (← links)
- 05000333/LER-1986-007, :on 860323,Limitorque Valve Actuator Torque & Limit Switch Insulation Discovered Unqualified.Basis for Qualification Not Established in Applicable Rept.Actuators Replaced W/Actuators Qualified Per NUREG-0588 (← links)
- 05000333/LER-1986-006, :on 860325,reactor Scram Occurred as Result of Reactor Vessel Low Level of 177 Inches Above Top of Active Fuel.Caused by Personnel Error.Operators Counseled on Need to Monitor Critical Evolutions (← links)
- 05000333/LER-1997-004-01, :on 970428,safety Relief Valve Failed to Open During Setpoint Verification Testing.Caused by Presence of Small Screw.Revised Target-Rock 2-Stage SRV Assembly Test Procedures,Reported Per 10CFR21 (← links)
- 05000333/LER-1996-010, :on 960916,plant Was Shut Down Re Inadvertent Connection of Two Terminals While Calibrating Protective Relay Due to Human Error.Personnel Responsible for Initiating Event Have Been Counseled (← links)
- 05000333/LER-1996-010-01, Forwards LER 96-010-01,plant Shut Down Due to Human Error Re Inadvertently Connecting Two Terminals While Calibrating Protective Relay.Revises Rept to Include Corrective Action for Human Performance Deficiencies.W/Status of (← links)
- 05000333/LER-1985-008, :on 850301,during 1985 Refueling Outage,Five Penetrations Showed Leakage Possibly Exceeding 0.6La Limit in Tech Spec 4.7.A.2.b.2.Caused by Normal Wear.Valve Repairs &/Or Replacements Successfully Completed (← links)
- 05000333/LER-1985-021, :on 850726 & 0809,two Reactor Scrams Occurred. Caused by Pressure Transients Due to Installation of Zero Leakage Shutoff Valves to Turbine Control Valve Control Sys.Orifices Installed (← links)
- 05000333/LER-1985-026, :on 851031,breaker Operation on Output Line Caused Turbine Generator Load Unbalance Resulting in Reactor Scram.Caused by motor-operated Disconnect at 345 Kv Substation.Plant Performed Per Design (← links)
- 05000333/LER-1985-019, :on 850719,reactor Scram Occurred.Caused by Loss of Electrical Power to 4 Kv Buses 10300 & 10500 Due to Operator Error.Operators Retrained on Electrical Distribution Sys (← links)
- 05000333/LER-1997-003, :on 970213,identified Potential Overpressurization of Containment Penetrations Due to Thermal Expansion.Caused by Original Plant Design.Completed Operability Determinations IAW GL 91-18 (← links)
- 05000333/LER-1985-025, :on 851029,outboard Steam Supply Isolation Valve Experienced Motor Operator Failure Causing High Pressure Core Injection Sys to Be Declared Inoperative. Caused by Loose Locking Screw (← links)
- 05000333/LER-1985-023, :on 850905,emergency Diesel Generators a & C Inadvertently Started.Caused by Operator Error.Operators Counseled on Necessity for Completing Procedural Step Before Starting Next Step (← links)
- 05000333/LER-1985-022, :on 850820,during Main Steam Line High Radiation Functional Test,Msiv B Closed.Caused by Wiring Error in MSIV Solenoids.Solenoids Replaced & Rewired Correctly (← links)
- 05000333/LER-1996-011-01, :on 961028,both Standby Liquid Control Subsystems Determined Inoperable.Due to Inoperable Pump Discharge Pressure Relief Valves.Slc Sys Pump Discharge Pressure Relief Valve 11SV-39A Was Replaced (← links)
- 05000333/LER-1997-002, :on 970124,shutdown Cooling Isolation Occurred. Caused by Pressure Transient.Placed Shutdown Cooling in Service After Resetting Isolation Logic & Refilling & Venting Sys (← links)
- 05000333/LER-1985-020, :on 850725,HPCI Sys Inoperable Due to Steam Line Isolation on High Ambient Temp.Caused by Procedural Inadequacy in Failing to Secure Plant Ventilation Sys When Environ Conditions Near Design Limits (← links)
- 05000333/LER-1996-015-01, :on 961218,determined Bypass Flow Path Around Offgas Isolation Valve.Caused by Design Deficiency.Installed Check Valve in Common Drain Line to Prevent Reverse Flow from Steam Jet Air Ejector Discharge (← links)
- 05000333/LER-1996-014, :on 961215,manual Scram Occurred Due to Leak in Main Turbine electro-hydraulic Control Sys.Failed Actuator Seal Was Repaired & Equipment Failure Evaluation of 29BPV-4 Actuator Seal Was Completed (← links)
- 05000333/LER-1996-013-01, :on 961116,reactor Protection & Primary Containment Isolation Sys Actuation on False Low Reactor Water Level Occurred Due to Personnel Error.Instrument Surveillance Procedure Changed (← links)
- 05000333/LER-1996-012-01, :on 961111,primary Containment Accumulative Leakage in Excess of Maximum Allowed by TS Occurred.Caused by Build Up on Valve Seat Areas.Efes Were Completed for Each Failed Valve (← links)
- 05000333/LER-1985-014, :on 850511,while Performing Surveillance Test, Reactor High Pressure Switches 02 Ps 128A & 02 Ps 128B Found to Actuate Above Tech Spec Limits.Switches Recalibr & Surveillance Frequency Increased (← links)
- 05000333/LER-1985-012, :on 850503,during Scheduled Maint Outage,Two Reactor Scrams Occurred.Caused by Improperly Valved Instruments Resulting in False Low Level Signal & Backfilled Instrument Line,Respectively (← links)
- 05000333/LER-1985-017, :on 850610,reactor Scram Occurred.Caused by MSIV Closure While in Run Mode Due to Improper Valve Lineup on Steam Flow Instrumentation.Scram Procedures Followed & Personnel Reinstructed (← links)
- 05000333/LER-1985-018, :on 850624,reactor Scram Occurred Due to Recirculation Flow Transient.Caused by Faulty Input Diode in Demodulator Board.Amplifier & Demodulator Board Replaced (← links)
- 05000333/LER-1985-011, :on 850506,during Refueling Outage,Inoperable Snubbers Found as Result of Functional Testing.Lockup & Bleed Rates Outside Acceptable Range.Snubbers Overhauled. Remaining Snubbers Functionally Tested (← links)
- 05000333/LER-1996-008-01, :on 960906,HPCI Sys Declared Inoperable Due to Failed DC to AC Power Inverter.Failed C11 Capacitor Located in HPCI Inverter 23INV-79 Replaced (← links)
- 05000333/LER-1985-015, :on 850601,APRMs A,D,E & F Tripped Downscale After Placing Reactor Mode Switch on Run & Increasing Power.Aprms D&F Found Out of Tolerance High.Cause Not Stated.Setpoints Adjusted & Surveyed Weekly (← links)
- 05000333/LER-1985-013, :on 850418,two Safety/Relief Valves Found Out of Tolerance During Testing.Possibly Caused by Inadequate Clearance in Labyrinth Seal Area & Pilot Seat Leakage.Pilot Overhauled to Current Procedure (← links)
- 05000333/LER-1985-010, :on 850421,during Refueling Outage,Fuel Assembly Inadvertently Lifted from Reactor Vessel W/Fuel Support Grapple When Visual Contact Grapple Lost.Caused by Operator Error.Operators Counseled (← links)
- 05000333/LER-1992-053, :on 921228,Group I Isolations Occurred While Performing Surveillance Testing in Support of Unit Startup. Caused by Failed Relay.Relay Replaced & Satisfactory Testing Completed (← links)
- 05000333/LER-1985-016, :on 850524,reactor Scram Signal Initiated During Scheduled Refueling Outage.Caused by Personnel Error. Scram Reset & Personnel Counseled (← links)
- 05000333/LER-1992-046, :on 921017,primary Containment Shutdown for Cooling Suction Isolation Valve Automatically Closed Due to Procedure Deficiency.Plant Procedures Will Be Revised to Reflect Changes to 10CFR50.72 & 10CFR50.73 (← links)
- 05000333/LER-1992-027, :on 920516,CS Isolation Testable Check Valve 14A0V-13A Exhibited Seat Leakage in Excess of TS Limit Due to Misalignment by One Bolt Hole.Valve Bonnet Correctly Aligned W/Valve Body (← links)
- 05000333/LER-1992-052, :on 921203,roving Fire Watch Tour Not Performed to Compensate for Smoke Detection Circuits Out of Svc.Caused by Personnel Error.Fire Watch Tour Reassigned & Disciplinary Action Taken (← links)
- 05000333/LER-1992-051, :on 921125,determined That Reactor Water Sample Flow to Conductivity Cell Isolated for Period Greater than 24 H.Caused by Inadequate Procedural Guidance.Addl Operator Aid Placed on Inservice Conductivity Cell (← links)
- 05000333/LER-1992-007, :on 920123,excessive Time Delay Observed When Performing Surveillance of Analog Transmitter Trip Sys Due to Thermal Aging.All Relays & Equipment Have Been Replaced or Will Be Before Plant Startup (← links)
- 05000333/LER-1992-049, :on 921110,determined That Procedure for Sealed Radioactive Source Leakage Surveillance Was Not Consistent W/Requirements of Ts.Caused by Procedure Deficiency.Ts Amend Will Be Submitted (← links)
- 05000333/LER-1992-050, :on 921111,discoverd Inadequate Testing of Emergency Diesel Generators.Caused by Procedural Deficiencies.Permanent Procedures Will Be Developed to Incorporate Deficiencies Identified (← links)
- 05000333/LER-1992-013, :on 920226,determined That Actual Design & Design Described in FSAR Differ for Air Conditioning Sys for Environ Encls.Caused by Incomplete Understanding of Design & Operation of Equipment.Load Ctrs Qualified (← links)
- 05000333/LER-1992-048, :on 921106,seismic Installation of Two Redundant safety-related Transformers Determined to Be Inadequate.Caused by Inadequate Installation Instructions. Load Ctrs Verified Adequately Secured (← links)
- 05000333/LER-1992-047, :on 921104,automatic Shutdown Cooling Occurred Due to Loss of Power to Rps.Caused by Voltage Drop When Starting Large Electrical Load.Protective Device Setpoint Will Be Evaluated (← links)
- 05000333/LER-1992-042, :on 920901,discovered That Fire Watch Posts Not Being Maintained Due to Personnel Error.Posts re-established W/Other Qualified Fire Watch Personnel & Reinforcement of Relevant Requirements Will Be Reviewed (← links)
- 05000333/LER-1992-035, :on 920825,circuit Breaker Supplying Power to Load Ctr step-down Transformer Tripped,Resulting in ESF Actuation & Loss of Effluent Monitoring.Caused by Failure of Transformer T-13.Transformer Replaced W/Spare (← links)
- 05000333/LER-1996-006-01, :on 960511,isolation of Reactor Core Isolation Cooling Sys Occurred.Caused by Failure of Master Trip Unit. Master Trip Unit Replaced W/Vendor Current Model (← links)
- 05000333/LER-1996-009-01, :on 960722,EDG B Failed to Complete Startup Sequence.Caused by Incorrect Installation of Agastat Relays. Calibr & Placed Devices 93-62-1EDGB01,93-62-1EDGB12 & 93-52A-1EDGB01 in Correct Locations (← links)
- 05000333/LER-1992-045, :on 921012,fire Watch Post Not Maintained as Required by TS 3.12.F Due to Personnel Error.C/A Included re-establishment of Fire Watch,Disciplinary Action & Continuing Reinforcement of TS Requirements (← links)
- 05000333/LER-1991-033, :on 911219,under LOCA Conditions,Water May Accumulate in Primary Containment Pressure Suppression Chamber (Torus) Causing Instrument Error.Caused by Water Accumulation.Calculations Performed (← links)
- 05000333/LER-1992-009, :on 920205,ten safety-related Instrument Channels Declared Inoperable.Caused by Inadequate Instructions Provided by Supplier.Change Request Written to Revise Drawings (← links)
- 05000333/LER-1992-024, :on 920506,EDG Declared Inoperable Due to Discovery of Potential for Engine Governor Offset in Event of Control Circuit Power Supply Ground.Caused by Design of Power Supply.Special Test Performed (← links)
- 05000333/LER-1985-009, :on 850322,three Target Rock Safety/Relief Valves Had Setpoint Values Outside Allowable Tolerances. Possibly Caused by Inadequate Clearances in Laberinth Seal Area or Pilot Seat Leakage.Valves Overhauled (← links)
- 05000333/LER-1992-043, :on 920904,identified Failure Mechanism in Which Redundant Control Circuits of ESW & SGT Could Be Lost. Caused by Sys Design Deficiency.Seismically Qualified Fuses Will Be Installed (← links)
- 05000333/LER-1992-036, :on 920626,determined That RCIC Vacuum Breaker Line Inadequately Protected Against HELB Effects.Caused by Erroneous Design Basis Analysis.Restraint Will Be Installed on RCIC Steam Supply Line (← links)
- 05000333/LER-1992-037, :on 920626,determined That Two RHR & Two CR Containment Isolation Valves Would Not Allow Remote Control Closure.Caused by Design Error.Design Mods to Identified Valves in Progress (← links)
- 05000333/LER-1996-007-01, :on 960522,sys Isolations & Standby Gas Treatment Initiation Occurred.Caused by False High Radiation Trip Signal.Detector Replaced W/Vendor Current Model (← links)
- 05000333/LER-1985-005, :on 850206,secondary Containment Integrity Breached During Full Power.Caused by Faulty Latch Mechanism on Outer Door.Mechanism Repaired (← links)
- 05000333/LER-1996-005-01, :on 960506,error in Safety Limit Minimum Critical Power Ratio (MCPR) Calculation Occurred.Caused by Error in Calculation of Methodology.Administrative Controls Re Operating MCPR Instituted (← links)
- 05000333/LER-1985-004, :on 850212,one of Two Reactor Bldg Pressure Suppression Chamber Vacuum Breaker Valves Made Inoperable & Remained Inoperable in Excess of Tech Specs.Caused by Restriction by Scaffolding (← links)
- 05000333/LER-1985-003, :on 850205,emergency Diesel Generators a & C & Emergency Svc Water Pump a Declared Inoperable When Pump Tripped During Startup for Routine Surveillance.On 850207, Pump Tripped on Overcurrent During Startup (← links)
- 05000333/LER-1984-021, :on 841012,IGSCC Found in Seven 12-inch Diameter Recirculation Riser Welds & in Four 28-inch Diameter Recirculation Suction Pipe Welds.Five 12-inch Pipe Joints Repaired (← links)
- 05000333/LER-1984-019, :on 840928,during Performance of Surveillance Test,Selection of Second Control Rod Failed to Initiate Rod Block After Rod 34-27 Selected & Withdrawn One Notch.Caused by Malfunction of Rod Switch (← links)
- 05000333/LER-1996-002-01, :on 960212,potential Common Mode Failure of Circuit Breakers in Both Safety Divisions Occurred Due to Design or Installation Error.Replaced Contacts in Failed Circuit Breakers (← links)
- 05000333/LER-1984-018, :on 840918,while Shut Down for Scheduled Maint Outage,Two Inadvertent Reactor Scrams Occurred within 1 H. Caused by Craft Personnel Accidentally Bumping Scram Discharge Instrument Vol Switch (← links)
- 05000333/LER-1985-002, :on 850117 & 18,shift Technical Advisor Position Unfulfilled.Qualified Individual Called in When Deficiency Noted.Caused by Personnel Error Due to Implementation of Worker Schedule Changes (← links)
- 05000333/LER-1992-041, :on 920817,technician Found Both Stack Sample Pumps Off.Caused by Loss of Stack Gas Sampling Due to Missed Low Flow Indication by Operator.Stack Monitor Sample Flow Reestablished & Work Request Written (← links)
- 05000333/LER-1985-001, :on 850104,HPCI Steam Supply Isolation Valve Breaker Alarm Relay Failed.Necessary Repairs Resulted in HPCI Sys Being Declared Inoperable for 2 1/2 H.Caused by Faulty Dc Coil (← links)
- 05000333/LER-2020-002, Unanalyzed Condition Due to Unprotected Control Circuits Running Through Multiple Fire Areas (← links)
- 05000333/LER-1992-040, :on 920806,ESF Actuation Occurred Due to False Automatic Isolation of Reactor Bldg Ventilation Sys.Caused by Operator Loosening Terminal Lug to Install Jumper.Lug Retightened & Operating Procedure Revised (← links)
- 05000333/LER-1992-033, :on 920617 & 25,determined That Type B Local Leak Rate Testing Program Per TS 4.7.A.2.b.1 for Primary Containment Penetrations Contained Deficiency.Caused by Personnel Error.Procedures Changed (← links)
- 05000333/LER-1992-031, :on 920605,false High Area Temp Signal Caused Automatic HPCI Isolation Logic Signal.Caused by Bowing of Supports Bars.Support Bars Straightened & Printed Circuit Card Fully Inserted (← links)
- 05000333/LER-1992-032, :on 920605,determined That Portion of Primary Containment Isolation Logic Had Not Been Tested Due to Procedural Deficiency.Surveillance Test Procedure Will Be Corrected (← links)
- 05000333/LER-1992-028, :on 920521,potential Failure of Both Rhr/Lpci Sys Occurred Due to Injection Valve Operator Motor Pinion Key Failure.Replacement Keys Stored in Warehouse (← links)
- 05000333/LER-1992-029, :on 920127,failure to Submit 30-day Special Rept Re Carbon Dioxide Fire Suppression Dampers Tagged Out for Maint.Caused by Failure to Track Lco.Procedure Change Implemented (← links)
- 05000333/LER-1996-004-01, :on 960228,multiple SRV Pilot Solenoid Failed Due to Foreign Matls,Vendor Deficiencies & Procedural Errors.Replaced Pilot Solenoid Valve W/Another Rebuilt Assembly (← links)
- 05000333/LER-1992-021, :on 920407,discovered Relay Room Cooling Operating in Manner Outside of Plant Design Basis.Caused by Personnel Error.Wire Restraining 70TCV-120B in Max Cooling Position Will Be Replaced (← links)
- 05000333/LER-1992-002-02, :on 920514,determined That ASME Class 3 Pressure Test Performed Per Later Editions of Code W/O Relief Request.Caused by Failure to Submit Relief Request. ASME Class 3 Procedures Have Been Revised (← links)
- 05000333/LER-1992-025, :on 920505,discovered Fire Watches Discontinued or Not Posted When Required During Shutdown.Caused by Personnel Error & Inadequate Equipment Status Control.Fire Watches Posted or Barriers Restored (← links)
- 05000333/LER-1996-003-01, :on 960222,plant Shutdown Due to Degraded Control Rod Scram Times & Manual Scram.Caused by Leak in Main Turbine EHC Sys.C/A:Bypass Valves Replaced (← links)
- 05000333/LER-1992-026, :on 920519,radwaste Bldg Vent Isolation Occurred Due to Personnel Error.Color Coded Name Plate Placards Scheduled to Replace Current Labels (← links)
- 05000333/LER-1996-001-01, :on 960125,failed to Implement RM Instrumentation Setpoint Changes Following Revision to Odcm. Caused by Personnel Error.Rm Alarm Setpoints Verified & Personnel Counseled (← links)
- 05000333/LER-1984-023, :on 841104,w/reactor at Approx 30% Power Following Outage,Reactor Trip Occurred Due to Reactor Vessel Low Water Level.Caused by Malfunctioning Condensate Bypass Flow Controller (← links)
- 05000333/LER-1985-007, :on 850220,actuation of Reactor Protection Sys Occurred.Caused by Erroneous Low Level Signal Resulting from Protective Tagging Evolution to Remove Reactor Pressure Vessel Transmitter from Svc (← links)
- 05000333/LER-1985-006, :on 850215 Turbine Trip & Reactor Scam Occurred.Caused by Closed Instrument Root Valve for Pressure Transmitter.Mod to Unbalance Circuit,Providing Indication of Circuit Failure Planned (← links)
- 05000333/LER-1984-022, :on 841028,full Scram Trip Occurred During APRM Surveillance Testing.Caused by Operator Error Due to Communication Breakdown.Personnel Counseled (← links)
- 05000333/LER-1992-030, :on 920708,hourly Roving Fire Watch Patrol Missed for 1 H When Fire Watch Left Plant W/O Being Properly Relieved.Caused by Failure to Follow Procedures. Procedures to Strengthen Fire Watch Changed (← links)
- 05000333/LER-1990-025, :on 901115 & 1226,five Svc Water to Emergency Svc Water Swing Check Valves Failed to Close During Testing. Caused by Failure of Swing Check Valve Disc.Valve Internals for Five Valves Replaced (← links)
- 05000333/LER-1992-023, :on 920505,auxiliary Operator Failed to Restart Sample Pump a Before Deenergizing Redundant Sample Pump. Caused by Personnel Error.Operator Counseled & Will Be Disciplined & Scheduling Database Revised (← links)
- 05000333/LER-1992-020, :on 920403,determined That Resolution of QA Nonconformance & Correction Action Rept,Written in Dec 1986, Inadequate.Caused by Personnel Error.Surveillance Procedures Revised & Personnel Added (← links)
- 05000333/LER-1995-015-01, :on 951215,discovered Omission of RWR Seal Purge Flow from Reactor Heat Balance.Caused by Inadequacy in Original Plant Design.Restricted Plant Output to 2434 Mwt to Maintain More than 1.4 Mwt Margin (← links)
- 05000333/LER-1992-019, :on 920407,required Hourly Fire Watch Patrol Not Posted within 1 H When Defects Found in Fire Barrier Penetration Seals in Rcic.Caused by Personnel Error.Written Info Re Fire Watch Patrol Provided (← links)
- 05000333/LER-1992-018, :on 920407,discovered Potential Failure of Containment Isolation Valves in RHR Pump min-flow Lines to Close.Caused by Design Error.Internal Parts of Valves Will Be Replaced Prior to Startup (← links)
- 05000333/LER-1992-016, :on 920326,util Received Notification from Test Facility That 8 of 11 Safety Relief Valves Actuated at Pressures Exceeding TS Limits.Caused by Setpoint Drift. All Pilot Assemblies Replaced (← links)
- 05000333/LER-1991-019, :on 910917,LLRT Line on HPCI Turbine Exhaust Line Check Valve Failed at a Socket Weld.Caused by Poor Weld Quality as Result of Paint Contamination During Installation.Socket Weld Was Repaired (← links)
- 05000333/LER-1984-017, :on 840720,remote Alarm Function for East Cable Tunnel Smoke Detection Sys Declared Inoperable.Hourly Patrolling Fire Watch Initiated,But Not Performed for 2 H Period.Disciplinary Action Administered (← links)
- 05000333/LER-1984-016, :on 840621,both 4 Kv Emergency Bus Undervoltage Relays on 10500 Bus (Div I) Found Outside Tech Spec Limits. Cause Not Stated.Procedure Placed in New Format Highlighting Tech Spec Requirements (← links)
- 05000333/LER-1984-015, :on 840716,HPCI Torus Suction Valve 23MOV-58 Failed to Open Fully & Declared Inoperable.Cause Undetermined.Operability Surveillance Successfully Performed Daily for 1 Wk (← links)
- 05000333/LER-1992-015, :on 920317,reanalysis of 10CFR50 App R Analyses Revealed Seven Deficiencies W/Potential to Effect Safe Shutdown Capability During Postulated Fires.Caused by Lack of Mgt Commitments.Deficiences Corrected (← links)
- 05000333/LER-1992-017, :on 920320,ventilation Sys Fire Dampers Found W/Inadequate Thermal Expansion Clearance & No Evidence of Test Lab Approval.Caused by Error During Original Const.No Immediate Action Required (← links)
- 05000333/LER-1992-012, :on 920224,determined That Normal Closed Position of Rhr/Lpci Pump Min Flow Valves Could Result in Failure of Pump.Caused by Improper Positioning of RHR Valves.Valve Position Changed to Open (← links)
- 05000333/LER-1995-013, :on 950905,FW Flow Transient Was Lost Due to Personnel Error.Performed Engineering Evaluation of RPV Thermal Transient (← links)
- 05000333/LER-1992-011, :on 920221 & 0303,while in Cold Shutdown,Fire Protection Features Obstructed by Scaffolding.Caused by Inadequate Supervision of Installation.Personnel Counselled W/Emphasis on Correct Scaffold Erection (← links)
- 05000333/LER-1995-014-01, :on 950926,RCIC Auto Instrument Channel Functional Tests Missed.Caused by Personnel Error.Instrument Surveillance Procedure ISP-150A Sucessfully Completed.W/ (← links)
- 05000333/LER-1984-020, :on 840928,two Reactor Scrams Occurred within 7 H.Caused by Under Vessel Nuclear Instrumentation Connector Bumped During CRD Mechanism Maint in Area.No Permanent Corrective Action Applicable (← links)
- 05000333/LER-1984-014, :on 840623,both Inner & Outer Drywell Entry Hatch Doors Open,Violating Primary Containment.Caused by Failure in Mechanical Interlock & Failure of Personnel to Recognize Integrity Violated.Doors Shut (← links)
- 05000333/LER-1984-013, :on 840625,while Placing Main Generator in Svc, Reactor Scram Occurred.Caused by High Reactor Pressure Resulting When Turbine Bypass Valve Failed Closed.Hydraulic Fluid Filters Replaced (← links)
- 05000333/LER-1995-013-01, :on 950905,discovered Loss Feedwater Flow Transient Due to Personnel Error.Revised Abnormal Operating Procedure AOP-1 (← links)
- 05000333/LER-1992-006, :on 920122,inadequate Fire Watch Noted in Areas W/Deficiencies in Fire Penetration Seal & Ventilation Ductwork Damper.Caused by Personnel Error.Fire Watch Personnel Replaced & Disciplined (← links)
- 05000333/LER-1992-005, :on 920122,remote Manual Closing of Primary Containment Isolation Valves for HPCI & RCIC Pump Suction Lines Defeated.Caused by Inadequate Operating Review.Design Reviews & Mod of Control Circuits Set Up (← links)
- 05000333/LER-1992-004, :on 920115,fire Suppression Sys for East & West Cable Tunnels Declared Inoperable.Caused by Inadequate Design & Review for App R Requirements.Continuous Fire Watch Posted in Each Tunnel (← links)
- 05000333/LER-1992-003, :on 920108,during Cold Shutdown Incorrect Motor Pinion Key Discovered in Core Spray Sys Injection & Primary Containment Isolation Valves.Caused by Vendor Error in Part Number.Correct Key Installed (← links)
- 05000333/LER-1992-002, :on 920107,15,17,18,22 & 24,calculations Indicated That Valve Operator Design for motor-operated Valves Would Not Provide Adequate Valve Stem Thrust,Per Generic Ltr 89-10.Operator Declared Inoperable (← links)
- 05000333/LER-1992-001-01, :on 920103,fire Watches Missed,Per Tech Spec 3.12.F.Caused by Inadequate Training & Supervision of Temporary Personnel.Supervisors Hired to Provide Training & Supervision (← links)
- 05000333/LER-1995-006-01, :on 950315,reactor SRV Setpoint Drift Occurred. Caused by Corrosion Bonding Between SRV Pilot Disc & Pilot Seat.Performed New analysis,GE-NE A00-05785-1,Rev 0 & Replaced Pilot Assemblies W/Refurbished Assemblies (← links)
- 05000333/LER-2020-001, Automatic Scram Due to Main Turbine Trip on High RPV Water Level (← links)
- 05000333/LER-1984-012, :on 840518,while Operating at Full Power,Rcic & HPCI Sys Found Inoperable,Contrary to Tech Specs.Rcic Failure Due to Malfunction in Isolation Circuitry.Hpci Failure Due to Stop Valve Stem Cracking (← links)
- 05000333/LER-1991-031, :on 911202,potential Design Deficiency Identified in Emergency Svc Water Sys.Caused by Inadequate Design Review During Original Const.Procedural Changes Made, Requiring Running RHR Swp During EDG Operation (← links)
- 05000333/LER-1991-030, :on 911209,undocumented Assembly Found in Signal Input Path to Each of Two Radiation Monitors.Caused by Inadequate Program Implementation of 10CFR50,App B.Cables Will Be Shortened & Rerouted (← links)
- 05000333/LER-1991-021, :on 910904,exhaust Ventilation Fan for One of Two safety-related Pump Rooms Tripped on Thermal Overload. Caused by Restricted Ventilation Air Supply to Pump Rooms. Fire Watch Posted & Damper Procedure Revised (← links)
- 05000333/LER-1991-018, :on 910917,spurious Primary Containment High Radiation Monitor Isolation Signal Occurred.Cause Not Determined.Panels,Containing high-range Radiation Monitors, Will Be Inspected During 1992 Outage (← links)
- 05000333/LER-1992-014, :on 920302,primary Containment Drywell High Range Radiation Monitor Trip Signal Caused Automatic Closure of Two Vents.Caused by Susceptability to Electromagnetic Interference.Monitor & Logic Reset (← links)
- 05000333/LER-1992-010, :on 920210,roving Fire Watch Patrols Missed for Six Hours.Caused by Personnel Error.Fire Watch Patrol Was Performed Immediately Upon Discovery of Problem.Replacement Fire Watch Supervisor Hired & Trained (← links)
- 05000333/LER-1984-007, :on 840304,prior to Scheduled Mod of Msiv,Local Leak Rate Test Performed.Results Exceeded Tech Spec.Caused by Seating Surface Degradation.Valve Seat Machined & Valves Reassembled (← links)
- 05000333/LER-1984-008, :on 840313,100 F/H Heat Up Rate Exceeded Tech Spec Limits.Caused by Personnel Error.Personnel Counseled & Alarm Points Incorporated in Plant Process Computer (← links)
- 05000333/LER-1984-005-01, :on 840225,primary Containment Atmosphere Monitoring Instrumentation Analyzers a & B Out of Svc for 5 H.Caused by Zero Point Calibr & Sample Flow Vacuum Pump Problems.Sys Mods Implemented (← links)
- 05000333/LER-1984-006, :on 840213,reactor Water Indicating Switch Found Out of Tech Spec Limits.Caused by Excessive Internal Mechanical Friction.Surveillance of Equipment Will Be Performed & Manufacturer Contacted (← links)
- 05000333/LER-1995-012-01, :on 950526,primary Containment Makeup Nitrogen Flow Monitoring Surveillance Missed Due to Personnel Error. Applicable Surveillance Tp (ST-40D) Change to Provide Alternate Means of Monitoring Subj Flow (← links)
- 05000333/LER-1984-003, :on 840207,while HPCI Intentionally Out of Svc for Maint & Mod,Rcic Sys Declared Inoperable.Caused by Personnel Error.Personnel Counseled & Training Program Implemented (← links)
- 05000333/LER-1991-029, :on 911130 & 1213,spurious Actuation of Primary Containment (Pc) Vent & Purge Isolation Sys Occurred.Caused by electrical-magnetic Noise Initiation of Pc High Radiation Monitors.Cr Operators to Remove two-way Radios (← links)
- 05000333/LER-1991-028, :on 911128,reactor Shutdown & Cooldown Was Not Completed within Time Required.Caused by Personnel Error. Operating Procedure 65 Will Be Revised & Event Will Be Discussed W/Licensed Operators (← links)
- 05000333/LER-1984-004, :on 840210,dc Ground Occurred on Station Battery A.During Ground Isolation Procedure,Dc Control Power to RCIC Inverter Momentarily Interrupted.Caused by Procedure Not Stating Manual Reset Required (← links)
- 05000333/LER-1991-027, :on 911127,determined That Low Pressure Coolant Independant Power Supply Potentially Inoperable.Caused by non-validation of Existing EQ Program Against New EQ Bases. Design Mod Being Prepared (← links)
- 05000333/LER-1984-001, :on 840118,during Surveillance Testing for Inoperative B Side Suppression Pool Cooling & Spray Isolation Valve,Rhr Svc Water Pump C Failed.Caused by Worn Impeller Collet.Valve Repaired (← links)
- 05000333/LER-1983-060-03, Incorrect Motor Actuator Installed on RHR Suppression Pool Outboard Isolation Valve During Maint Activities.Cause Not Stated.Replacement Actuator Installed on 840119 (← links)
- 05000333/LER-1991-026, :on 911127,Train a & B Core Spray Pump Min Flow Valves Declared Inoperable.Cauesd by Inadequate Initial Onsite Review of Nuclear Svcs Info Ltr SIL 414,unclear Design Basis & Inappropriate Mod Priority (← links)
- 05000333/LER-1991-025, :on 911114,suppression Pool Water Temp Monitoring Sys Channels a & B Declared Inoperable.Caused by Wiring Termination Deficiencies.Unsoldered Wire Terminators Soldered (← links)
- 05000333/LER-1995-010-01, :on 950530,TS Required Plant Shutdown Due to Unidentified Leakage Into Drywell.Repacked Valve 02-RWR-52B Using Current Maint Practice of Repacking w/non-asbestos Graphite (← links)
- 05000333/LER-1995-011-01, :on 950531,leakage of Primary Containment Isolation Valves Was Exceeded.Caused by 02-2AOV-39 & 02- 2AOV-40 Experiencing Repeated Difficulty in Passing Llrt. Flushed Seat on Inboard Isolation Valve (← links)
- 05000333/LER-1991-020, :on 910925,fire Door in App R Barrier Between Turbine Bldg & Radwaste Bldg Found W/Latch Mechanism Taped, Preventing Latching of Door.Caused by Human Error. Firewatch Posted & Door Repaired & Tested (← links)
- 05000333/LER-1983-025-03, /03L-0:on 830810,mgt Review of Surveillance Test Results Revealed Excessive Containment Isolation Valve Closure Times Signed Off as Satisfactory.Caused by Personnel Error.Personnel Counseled (← links)
- 05000333/LER-1991-017, :on 910822 & 0910,journeyman Operator & Engineering Personnel Found Fire Doors Between Emergency Diesel Generator Rooms Open.Caused by Personnel Error.Fire Doors Secured & Fire Watch Posted (← links)
- 05000333/LER-1991-006, :on 910507,two Primary Containment Isolation Valves in Both RHR LPCI Subsystems Found Inoperable.Caused by Failure of Stem Nut Due to Wear & Inadequate Lubrication.Stem Nut Replaced (← links)
- 05000333/LER-1991-012, :on 910721,south Cable Tunnel to Relay Room Fire Door Found Blocked Open During Shutdown for Maint. Caused by Human Error.South Cable Door Closed & Addl Fire Watch Posted (← links)
- 05000333/LER-1991-007-01, :on 910621,reactor Scram Occurred.Caused by False Low Reactor Water Level Signal During Calibration of Level Instrumentation.Root Cause Investigation in Progress (← links)
- 05000333/LER-1995-009, :on 950425,partial Invalid Isolation of Reactor Bldg Ventilation Occurred Due to Jumper Sliding Off Terminal & Striking Nearby Cable Connector.Continued W/Existing Mod Intended to Improve Attachment of Jumpers (← links)
- 05000333/LER-1984-009, :on 840322,reactor Scram Occurred as Result of Low Reactor Vessel Operation.Caused by Failure of Operating Feed Pump Bearing.Plant Placed in Cold Shutdown While Repairs to Feed Pumps Completed (← links)
- 05000333/LER-1984-011, :on 840329,turbine Bldg Ventilation Radiation Monitors a & B Failed Simultaneously,Downscale,Resulting in Ventilation Isolation.Caused by Moisture Entering Cable Connectors to Monitors (← links)
- 05000333/LER-1983-002-03, /03L-0:on 830109,standby Gas Treatment Sys B Humidity Control Heater Out of Svc for Approx 5 H.Caused by Shorted Silicon Controlled Rectifier to Ground.Silicon Controlled Rectifier Removed (← links)
- 05000333/LER-1983-003-03, /03L-0:on 830111,while Conducting Surveillance Testing on Core Sparger to Reactor Vessel D/P Switches 14DPIS-43A & B,Instrument Setpoints Found to Be Less Conservative than Required.Caused by Instrument Drift (← links)
- 05000333/LER-1995-008, :on 950326,HPCI Sys Tripped on Overspeed Due to Procedure Deficiency.Adjusted HPCI Flow Controller Output Current Limits to Limit Saturation of Controller (← links)
- 05000333/LER-1978-112-03, /03L-0 on 781226:discovered That Surveillance Requirements Not Performed on Air Operated Isolation Valves. Procedures Revised & Testing Completed W/Satisfactory Results (← links)
- 05000333/LER-1983-058-03, /03L-0:on 831128,during Surveillance Testing on HPCI Turbine Steam Line High Flow Instrument 23-DPIS-77, Setpoint Found W/Less than 106 Inches of Water Required. Caused by Instrument Drift.Setpoint Adjusted (← links)
- 05000333/LER-1983-062-03, /03L-0:on 831203,during Surveillance Testing, Calibr Span on Scram Discharge Vol Level Transmitter 03-DPT-231-H Found Out of Spec.Caused by Improperly Sloped Test Vent Tube.Calibr Span Adjusted (← links)
- 05000333/LER-1983-061-03, /03L-0:on 831130,during Surveillance Test F-ST-2R, RHR Svc Water Pump P-1C,mfg by Allis-Chalmers,ran W/High Vibration.Pump Declared Inoperable.Cause Not Stated.Bearing Sleeve,Suction Bell & Line Shaft Replaced (← links)
- 05000333/LER-1983-059-04, /04T-0:on 831129,periphyton Exceeded 10 Times Control Sample for Co-60.Caused by Bioaccumulation Factor for Element.No Radiation Dose to Man Expected (← links)
- 05000333/LER-1983-056-03, /03L-0:on 831114,while Conducting Surveillance Testing,Monitor 17-RM-251C Setpoint Found Less Conservative than Tech Spec Table 3.1-1.Caused by Instrument Drift. Monitor Recalibr (← links)
- 05000333/LER-1983-055-03, /03L-0:on 831104,turbine Steam High Flow Containment Isolation Switch 23-DPIS-76 Setpoint Found Less Conservative than Tech Spec.Caused by Instrument Drift. Setpoint Adjusted (← links)
- 05000333/LER-1983-044-03, /03X-1:on 830930,during Normal Operation,Drywell Continuous Atmosphere (Particulate) Radioactivity Monitoring Sys a & B Side Out of Svc.Side a Hard Downscale Indication Caused by Failed Detector (← links)
- 05000333/LER-1991-013, :on 910731,both Standby Liquid Control Sys Declared Inoperable.Caused by Loss of Pump Discharge Accumulator Precharge.Both Accumulators Immediately Recharged & Placed on Increased Monitoring (← links)
- 05000333/LER-1983-054-03, /03L-0:on 831104,steam Leak Occurred in 3/4-inch Pipe to HPCI Header Vent.Caused by Crack in heat-affected Area of Weld on Short Pipe Nipple.Rhr HX Sys Supports Checked to Verify Correct Installation (← links)
- 05000333/LER-1983-057-03, /03L-0:on 831106,during Surveillance Test, Calculation of Reactor Coolant Leakage Rates Inside Primary Containment Not Performed.Caused by Personnel Error.Missing Data Recorded & Personnel Counseled (← links)
- 05000333/LER-1991-014, :on 910717,inboard LPCI Injection Valve Failed to Open.Caused by Hydraulic Locking of Valve Bonnet.All Four Valves Were Modified to Place Bonnet Vent to High Pressure Side of Valves (← links)
- 05000333/LER-1995-007, :on 950313,reactor Coolant Temp Raised Above 212 Degrees W/Less than Min Number of Required Operable Crev Air Supply Fans.Caused by Inoperability of Fan Motor.Fan Repaired (← links)
- 05000333/LER-1995-001, :on 950106,test Results for Five of Six Valves Exceeded 1% Tolerance Allowed by TS for Valve Actuation. Caused by Initial Lift Setpoint Drift Set High for All Pilot Mechanisms.Replaced SRV Pilot Assemblies (← links)
- 05000333/LER-1995-005-01, :on 950313,discovered That Rv Water Level Trip Setpoint for Containment Cooling Interlock Outside TS Limits.Caused by Personnel Error & Instrument Drift.Piping & Condensing Chamber Modified (← links)
- 05000333/LER-1983-053-03, /03L-0:on 830604,baseplate of Snubber Support on Torus Cooling Line Found W/Concrete Anchor Bolts Pulled from Concrete Embedment.Caused by Water Hammer.All Discrepancies Repaired (← links)
- 05000333/LER-1983-052-03, /03L-0:on 831101,during F-ST-48,HPCI Turbine Stop Valve Tripped Shut.Caused by Dirt Under Trip Piston Allowing Hydraulic Oil to Be Dumped from Stop Valve Hydraulic Actuator.Trip Assembly Cleaned (← links)
- 05000333/LER-1983-051-03, /03L-0:on 831025,condensate Storage Tank Low Level Switch 23-LS-74B Setpoint Found Below Tech Spec Min.Caused by Setpoint Drift.Setpoint Immediately Adjusted (← links)
- 05000333/LER-1983-042-03, LPCI Independent Power Supply B Tripped.Caused by Faulty Inverter Leg Assembly. Assembly Replaced & Inverter Tested Satisfactorily (← links)
- 05000333/LER-1983-043-03, /03L-0:on 830927,condensate Storage Tank Low Level Switch 23-LS-74A Failed to Trip at Setpoint of 59.5 Inches Above Tank Bottom.Cause Unknown.Switch Mechanism Will Be Observed Further (← links)
- 05000333/LER-1983-048-03, /03L-0:on 831021,during Normal Operation,Plant Entered 24 H Limiting Condition Due to Control Rod Selection Switch 10-15 Being Inoperable.Caused by Switch Aging.Switch Replaced (← links)
- 05000333/LER-1983-050-03, /03L-0:on 831024,reactor Cleanup Sys Equipment Area High Temp Switch 12-TS-139B Setpoint Found Higher than Tech Spec Max.Caused by Instrument Drift.Setpoint Reset (← links)
- 05000333/LER-1983-046-03, /03L-0:on 831008,plant Entered 24 H Limiting Condition for Operation Due to Control Rod 02-23 Rod Selection Switch Inoperability.Caused by Old Age of Switch. Switch Replaced & Verified Operable (← links)
- 05000333/LER-1983-045-03, /03X-1:on 831004,discovered Surveillance Test F-ST-5B, APRM Instrument Functional Test, Exceeded Tech Spec Requirements by 18 Minutes.Caused by Personnel Error. Surveillance Schedule Updated (← links)
- 05000333/LER-1983-047-03, /03L-0:on 831027,during Surveillance Testing,One of Four Scram Instrument Vol Drain Valves AOV35 Failed to Close within Specified Time Frame.Relaxation of Lower Stroke Time Limit Under Evaluation (← links)
- 05000333/LER-1983-040-03, During Testing of post-accident Sampling Sys,Deuterium & Oxygen Sampling Sys Inoperable.Caused by New Mod.Change to Tech Specs Allowing short-term Isolation Initiated (← links)
- 05000333/LER-1983-039-03, /03L-0:on 830920,main Steam Line Containment Low Pressure Switch Setpoint Found Less Conservative than Tech Spec Requirements.Caused by Instrument Drift.Setpoint Readjusted (← links)
- 05000333/LER-1983-038-03, /03L-0:on 830916,while Performing RHR Motor Operated Valve Operability Surveillance Test F-ST-2C,LPCI Valve 10MOV-25B Stopped in Middle of Open Stroke.Caused by Loosened Motor Pinion & Disloged Key (← links)
- 05000333/LER-1983-031-03, /03L-0:on 830912,two of Five Tested Target Rock Safety/Relief Valves Had Setpoint Values Lower than Allowable Tolerance,Two Had Lift Setpoints Above Tolerance & One Did Not Lift.Valves Refurbished by Vendor (← links)
- 05000333/LER-1983-035-03, /03L-0:on 830909,during Surveillance Testing,Main Steam Line High Flow Switch 02-DPIS-116D Did Not Trip Primary Containment Isolation Sys Logic.Caused by Failed Microswitch.Microswitch Replaced (← links)
- 05000333/LER-1983-033-03, /03L-0:on 830905 & 07,during Startup & Ascension to Power While Inerting Drywell,Torus Level Fell Below Tech Spec Requirements.Caused by Water Block in Dry Leg of Level Transmitter.Dry Leg Vented (← links)
- 05000333/LER-1984-002, :on 840130,emergency Svc Water Breaker B Tripped.Caused by Incorrect Settings Due to Test Equipment Being Out of Calibr.Pump & Breaker Trip Devices Adjusted & Pump Returned to Svc (← links)
- 05000333/LER-1993-019-02, Forwards Updated CR Habitability Rept, Response to NUREG-0737,III.D.3.4 CR Habitability for JAFNPP, Per Commitment to Submit Rept as Corrective Action Associated W/ LER-93-019-02 (← links)
- 05000333/LER-1983-022-03, /03X-1:on 830607,during Performance of Local Leak Rate Testing,Containment Spray Penetration X-39A Found W/Leakage Exceeding 0.6 La.Caused by Normal Use.Valve Seal, Disc &/Or Seat Surfaces Replaced (← links)
- 05000333/LER-1983-030-03, /03L-0:on 830830,AE Advised That Emergency Diesel Generators Could Be Rendered Inoperable If Diesel Exhaust Sys Subjected to Tornado Wind Loads.Exhaust Sys Modified in Lieu of Performing Study (← links)
- 05000333/LER-1983-026-03, /03L-0:on 830819,during Special Insp of Main Steam Line Pipe Supports & Restraints Outboard of Containment Msiv,Support Frame Above Trunnion H29-351 Found Bent.Caused by Insufficient Design Clearance (← links)
- 05000333/LER-1994-007-01, :on 941030,unanticipated RCIC Outboard Core Isolation Valve Isolation Signal Received.Caused by Poor Work Practices.Rcic Exhaust Diaphragms Replaced (← links)
- 05000333/LER-1983-065-03, /03L-0:on 831216,while Conducting Surveillance Testing of Main Steam Line Radiation Monitors,Setpoint of Monitor 17-RM-251C Found Less Conservative than Tech Spec. Caused by Instrument Drift.Setpoint Adjusted (← links)
- 05000333/LER-1983-067-03, /03L-0:on 831228,while Conducting Surveillance Testing on RCIC Turbine Steam Line High Flow Switch 13-DPIS-84,setpoint Found Less Conservative than Required. Caused by Instrument Drift.Setpoint Corrected (← links)
- 05000333/LER-1983-063-03, /03L-0:on 831215,during Normal Operation,Lpci Independent Power Supply a Tripped.Cause Undetermined.Power Supply Returned to Svc (← links)
- 05000333/LER-1983-004-03, /03L-0:on 830117,control Rod 18-27 Found Uncoupled & Would Not Recouple.Caused by Bent Uncoupling Rod in Control Rod Drive Mechanism & Loose Inner Filter.Mechanism Replaced W/Rebuilt Unit (← links)
- 05000333/LER-1983-064-03, /03L-0:on 831220,while Conducting Surveillance Testing on Reactor Low & High Water Level Switches 02-3-LIS-101D,setpoint Found Less Conservative than Tech Spec.Caused by Setpoint Drift (← links)
- 05000333/LER-1983-005-03, /03L-0:on 830120,unplanned Release of Laundry Effluent Occurred Prior to Sampling After Laundry Drain Tank a Placed in Recirculation Lineup W/Discharge Lineup Still Available.Caused by Personnel Error.Operator Counseled (← links)
- 05000333/LER-1983-041-04, /04T-0:on 831228,mollusk Samples Exceeded 10 Times Control Sample for Mn-54.Caused by High Release of Mn-54 Via Liquid Effluent,Producing High Concentration Factor in Mollusks.Release within Tech Spec Limits (← links)
- 05000333/LER-1982-059-03, /03L-0:on 821226,MSIV B Outboard 10% Switch Would Not Reset When Tested Per Tech Spec 3.1-1.Caused by Mismatch Between Activation & Striker Plate in Reset Direction of Valve Travel.Striker Plate Mechanically Reworked (← links)
- 05000333/LER-1982-022-03, /03L-0:on 820501,during Normal Operation,Emergency Diesel Generator D Declared Inoperable W/A Also Inoperable Requiring Reactor Shutdown Initiation.Cause Not Determined. Generators Declared Operable & Returned to Svc (← links)
- 05000333/LER-1981-039-03, /03X-1:on 810429,containment Spray Valves 10M0V26A & 31A Limit Switch Rotors Failed,Making Containment Spray Loop a Inoperable.Caused by Loose Switch Finger Screws. Rotors Replaced (← links)
- 05000333/LER-1994-009-01, :on 941129,partial Invalid Primary Containment Isolation as Result of Personnel Error During Electrical Bus Power Source Transfer.Operations Personnel Restored Sys to Normal in Accordance W/Plant Procedures (← links)
- 05000333/LER-1991-006-01, :on 910507,manual Reactor Shutdown Occurred Due to Inoperability of Both Low Pressure Coolant Injection Subsystems.Caused Mechancial Failure of One Valve in Each of Two Sys.Root Cause Investigation Started (← links)
- 05000333/LER-1994-010-01, :on 941202,shutdown Cooling Isolation Occurred Due to Personnel Error & Poor Work Practices.Responsible Individual Counseled by Operations Dept Mgt (← links)
- 05000333/LER-1995-002-01, :on 950113,determined That Due to Personnel Errors,Portion of Offgas Sys Exhaust Line Isolation Logic Circuit Had Not Been Tested Every 6 Months.Procedures Corrected & Circuits Tested Prior to Startup (← links)
- 05000333/LER-1995-003, :on 950114,primary Containment Isolation Sys Group 2 Isolation Occurred.Caused by Abnormal Electrical Lineup & Procedural Deficiency.Procedure Controlling Bus Outage Restoration Will Be Revised (← links)
- 05000333/LER-1983-037-03, /03L-0:on 830915,while Conducting Surveillance Testing on Drywell High Pressure Switches for Reactor Protection & Auto Depressurization Sys,Setpoint Found Less Conservative That Tech Specs.Setpoint Adjusted (← links)
- 05000333/LER-1983-036-03, /03L-0:on 830914,during Testing on High Drywell Pressure Switches,Eccs Actuation Occurred,Resulting in Starting of Core Spray Pumps a & B,Hcpi,Standby Gas Treatment Sys & Emergency Diesel Generators (← links)
- 05000333/LER-1983-029-03, /03L-0:on 830829,hydraulic Snubber H12-94 (12-1-S-20) Failed to Lockup in Compression When Tested. Caused by Poppet Spring Lodged Between Compression Poppet & Seat.Modified Valve Assembly Installed (← links)
- 05000333/LER-1983-032-03, /03L-0:on 830903,during post-mod Scram Test at 50% Rod Density,Two of Four Scram Instrument Vol Drain Valves Failed to Close in Specified Time Frame.Caused by Contact Between Handwheels & Object (← links)
- 05000333/LER-1983-028-03, /03L-0:on 830823,instrument 02-3-PS-52B Setpoint Found at 444 Psig,Below Tech Spec Limit of 450 Psig.Caused by Instrument Drift.Switch Setpoint Immediately Adjusted & Testing Frequency Increased (← links)
- 05000333/LER-1983-034-03, /03L-0:on 830906,during Surveillance on Average Power Range Monitor C,Downscale Trip Level Setting Found Low.Caused by Instrument Drift.Monitor Adjusted.Testing Frequency Increased (← links)
- 05000333/LER-1994-006-01, :on 940916,discovered Two Incorrect Assumptions in Two EQ Program Analyses Performed in 1981.Caused by Personnel Error.Temporary Mod Prepared & Three Fire Dampers Closed on 940916 (← links)
- 05000333/LER-1993-021, :on 930722,motor for 10MOV-25A RHR a Side LPCI Inboard Isolation Valve Failed Due to Inadequate Brake Design Test.Mod M1-90-174 Completed on Motor Actuators for 10MOV-25A & B (← links)
- 05000333/LER-1991-011, :on on 910617,walkdown of Panel Anchorage & Adjacent Panels Revealed Number of Anchorage Points Not Plug Welded to Existing Embedded Floor Steel.Caused by Original Const Error.Mod to Anchor Panels Initiated (← links)
- 05000333/LER-1991-009-01, :on 891207,piping Configuration & Support Detail Deviations Noted During Insp of Pipe Supports.Caused by Original Design Error.Pipe Support Modified by Removing One Degree of Restraint on Piping (← links)
- 05000333/LER-1983-019-03, /03L-1:on 830501,low Pressure Coolant Injection Sys Side B Independent Power Supply Inverter Indicated Minor Trouble Alarm.Caused by Failed Gate Firing Module Printed Circuit Board.Board Replaced (← links)
- 05000333/LER-1991-008, :on 910625,fire Barrier Manway Discovered Opened W/O Fire Watch.Caused by Personnel Error.Counseling of Personnel & Labeling of Removable Fire Barrier Penetration Seals Completed (← links)
- 05000333/LER-1983-021-03, During Mgt Review of Instrument Surveillance Procedure F-ISP-66-1, Scram Discharge Vol High Level Instrument Calibr, Rod Block Calibr Not Performed within 7 Days of Shutdown (← links)
- 05000333/LER-1994-008-01, :on 941103,relay Room Vent Sys Isolation Valve Cable & Design Document Concerns.Caused by Inadequate Documentation & Implementation of Design Bases.Relay Room Ventilation Was Placed in Isolate Mode Operations (← links)
- 05000333/LER-1993-009-02, Forwards LER 93-009-02 Re Low Rwl Scram Due to FW Transient. Replacement of Reactor Feed Discharge Valves W/Improved Design Scheduled So That One Valve Will Be Replaced During 1994 Refueling Outage (← links)
- 05000333/LER-1983-024-03, /03L-0:on 830727,fire Barrier Penetration Seal in Reactor Bldg Opened & Remained Open Longer than 1 H W/O Establishment of Continuous Fire Watch.No Cause Stated.Watch Established Until Penetration Sealed (← links)
- 05000333/LER-1983-018-04, /04T-0:on 830426,standby Gas Treatment Sys a Charcoal Failed Offsite Methyl Iodide Efficiency Test. Caused by Defective Test Instrument.Charcoal Replaced (← links)
- 05000333/LER-1980-006-03, Core Spray Injection Valve 14-MOV-12A Improperly Operated During 791221 Surveillance Test.Caused by Misoperation of Valve Circuit Breaker Overload Trip Device (← links)
- 05000333/LER-1983-014-03, /03L-0:on 830404,during Normal Plant Operations, Four Cells of B Side Station Battery Found to Have Through Wall Cracks Leaking Electrolyte.Caused by Mishandling of Cells During Original Installation.Cells Replaced (← links)
- 05000333/LER-1983-017-03, /03L-0:on 830414,Nine Mile Point-South Oswego 115kV Line 5 Tripped & Locked Out,Removing One Reserve Power Supply from Svc.Caused by Line Automatically Isolating When Tower Hold Down Guy Pulled Out of Ground (← links)
- 05000333/LER-1983-015-03, /03L-0:on 830408,while Conducting Surveillance Test F-ST-1D,switch 2A-S12B Found Out of Normal Position in Test Mode D.Caused by Inadequacies in Implementation of Procedural Controls (← links)
- 05000333/LER-1983-016-03, During Surveillance Testing on D Max Stillwater Level High Radiation Monitor, Setpoint of high-high Trip Found Below Tech Spec Limit. Caused by Instrument Drift.Setpoint Adjusted (← links)
- 05000333/LER-1983-013-03, /03L-0:on 830322,during Low Pressure Main Steam Line Switch 02-PS-134B Surveillance Testing,Setpoint Found Less Conservative than Tech Spec Limits.Caused by Instrument Drift.Setpoint Readjusted (← links)
- 05000333/LER-1991-003-01, :on 910310,high Radiation Gate Left Unlocked & Unguarded.Caused by Personnel Error.Reaffirmed High Radiation Area Locked Gate Requirements W/All Radiation Workers & Disciplinary Action Taken (← links)
- 05000333/LER-1983-020-03, /03L-0:on 830520,during Monthly Valve Cycling Surveillance Test of 23 MO-60 (HPCI Outboard Containment Isolation Bypass Valve),Valve Motor Tripped on Overload. Caused by Hard Valve Packing (← links)
- 05000333/LER-1983-010-03, /03L-0:on 830214,during Normal Operation,Rhr Pump B Removed from Svc for 3 Days to Inspect & Repair Discharge Check Valve.Three Missing Hanger Returning Cap Screws & One Sheared Cap Screw Identified.Mod Initiated (← links)
- 05000333/LER-1983-009-03, /03L-0:on 830202,during Surveillance Testing on Emergency Svc Water Pump B Side,Pump Motor Supply Tripped Open on High Current Flow.Caused by Improper Adjustments During Maint.Trip Devices Adjusted Properly (← links)
- 05000333/LER-1982-004-03, /03X-1:on 820227,during Normal Shutdown,Part of Logic Sys Functional Tests Required by Tech Spec Table 4.2.1 Had Not Been Performed.Caused by Procedure Error.Procedure Revised & Surveillance Performed (← links)
- 05000333/LER-1979-029-03, /03L-0 on 790518:during Snubber insp,14 Snubbers Required Some Work & Six Snubbers Were Determined to Be Potentially Inoperable.Snubbers Removed & Tested.Two Snubbers Failed Test & Were Declared Inoperable (← links)
- 05000333/LER-1978-105-03, /03L-0 on 781214:operations Surveillance Test F-ST-15A,torus Water Level Exceeded Tech Spec Requirements, Due to drywell-to-torus Differential Pressure Drop to 0 Psi Caused by Test (← links)
- 05000333/LER-1978-094-03, /03L-0 on 781122:during Shutdown & Surveillance Test,A Number of Battery Cells Were Found W/Specific Gravity &/Or Individual Cell Voltage Variations(High or Low) Greater than Allowed by Test Acceptance Criteria (← links)
- 05000333/LER-1978-094, Forwards LER 78-094/03L-0 (← links)
- 05000333/LER-1978-085-04, /04X-1 on 781006:3rd Quarter Release of Halogens & Particulates Greater than Tech Specs.Caused by Steam Leaks & Fuel Pin Clad Performance (← links)
- 05000333/LER-1978-085, Forwards LER 78-085/04X-1 (← links)
- 05000333/LER-1978-090, Forwards LER 78-090/03L-0 (← links)
- 05000333/LER-1978-089-03, /03L-0 on 781101:during Refueling & Maint Shutdown It Was Found That Surveillance Test Had Not Been Performed for Combustion Ionization Products Smoke Detectors Installed in Diesel Fire Pump Room on 780310,due to Oversight (← links)
- 05000333/LER-1978-089, Forwards LER 78-089/03L-0 (← links)
- 05000333/LER-1978-088-04, /04L-0 on 781024:excess Solute Release from Makeup Water Treatment Waste Neutralizer Tanks to Circulating Water Discharge Tunnel Detected.Caused by Unsound Sampling & Method of Determining Concentrations & Dissolved Solids (← links)
- 05000333/LER-1978-088, Forwards LER 78-088/04L-0 (← links)
- 05000333/LER-1978-086-03, /03L-0;on 781016,during Refuel Shutdown,Two Elec Conduits Passing Through Safety Related Area Fire Barrier Found to Be Improperly Sealed in Violation of Tech Spec. Both Penetrations Immediately Sealed (← links)
- 05000333/LER-1978-086, Forwards LER 78-086/03L-0 (← links)
- 05000333/LER-1978-087, Forwards LER 78-087/04T-0 (← links)
- 05000333/LER-1978-056-03, /03L-1:on 780722,core Spray Sys Outboard Isolation Valve Would Not Close.Caused by Sheared Limitorque Shaft Key.Key Replaced (← links)
- 05000333/LER-1978-082-03, /03L-0:on 780920,during Refueling Shutdown, Pressure Suppression Pool Torus Level Increased to 0.8 Inches Above Tech Spec Limit.Caused by Leaking Past Seat of Safety Relief Valve (← links)
- 05000333/LER-1978-075-03, /03L-1:on 780902,during Surveillance Test F-ST-3D, Normally Closed Inboard Core Spray Injection Valve 14-MOV-12B Failed to Open Electrically,Causing Sys Inoperability.Caused by High Differential Pressure (← links)
- 05000333/LER-1978-079-04, /04L-0 on 780914:An Apparent Excessive Solute Release from Makeup Water Treatment Waste Neutralizer Tanks to Circulating Water Discharge Tunnel Was Detected While Performing Aug 78 24-hour Complete Sample Analysis (← links)
- 05000333/LER-1978-079, Forwards LER 78-079/04L-0 (← links)
- 05000333/LER-1983-006-03, /03L-0:on 830110,Wyle Labs Notified Util That as-found First & Second Actuations of Relief Valve D Were Out of Tech Spec Tolerances of 1,094 to 1,116 Psig.Cause of Setpoint Drift Unknown.Problem Under Investigation (← links)
- 05000333/LER-1991-002-01, :on 910304,opening Made in Wall to Install Telephone Cable Conduit Sleeve & Fire Watch Not Provided. Caused by Personnel Error & Deficient Procedures.Fire Watch Posted & Foreman Retrained (← links)
- 05000333/LER-1983-001-04, /04T-0:on 821230,number of Fish Impinged During 24 H Period Exceeded 20,000.Caused by Bad Weather Conditions Experienced During Sampling.Sampling Continued Until Fish Count Fell Below 20,000 (← links)
- 05000333/LER-1982-051-03, While Conducting Surveillance Testing on Reactor Low Water Scram Switch 02-3-LIS-101D,setpoint Found Less Conservative than Required.Caused by Instrument Drift.Setpoint Adjusted (← links)
- 05000333/LER-1994-004-01, :on 940609,determined That Single Failure of Reactor Vessel Low Level or High Drywell Pressure Isolation Control Logic.Caused by Inadequate Design Documentation. UFSAR Will Be Updated (← links)
- 05000333/LER-1994-005-01, :on 940623,determined That Test Results Exceeded 1 Percent Tolerance Allowed by TS for Valve Actuation.Caused by Leakage.Replaced SRV Pilot Assemblies W/Recertified Assemblies (← links)
- 05000333/LER-1990-005, :on 900220,high Pressure Coolant Injection Sys Inoperable.Caused by Binding in Remote Servo Resulting in Delay in Valve Response.Remote Servo Mechanism Replaced & Maint Insp Will Be Conducted (← links)
- 05000333/LER-1982-050-03, /03L-0:on 821109,scram Discharge Vol Rod Block Level Surveillance Test Not Performed within 7 Days of Reactor Startup,Per Tech Spec.Caused by Failure to Enter Frequency Statement in Procedure During Review of Amend 62 (← links)
- 05000333/LER-1994-003-01, :on 940518,identified That TS Requirement to Visually Inspect Battery Cell Plates Removed from Procedure. Caused by Personnel Error.Ts Interpretation Written to Describe How to Conduct Cell Plate Insp (← links)
- 05000333/LER-1982-018-03, /03X-1:on 820419,surveillance Testing Indicated Four Smoke Detectors Inoperable.Caused by Failure to Terminate Connecting Cabling Properly,Due to Inadequate Procedure Preparation & Review.Procedure to Be Revised (← links)
- 05000333/LER-1982-044-03, /03L-0:on 820909,motor Operator Electrical Breaker Tripped While Attempting to Cycle LPCI Injection Valve. Caused by Electrical Motor Fault Resulting in Isolation Failure Created During Attempted Valve Cycling (← links)
- 05000333/LER-1983-012-04, /04T-0:on 830302,tritium Concentration in Inlet Sample Found 39.2 Times Control Sample Results.Caused by Downstream Sampling Points of Waste Discharge Rather than Normal Upstream Locations.Sample Not Representative (← links)
- 05000333/LER-1983-011-01, /01T-0:on 830304,abnormally High Tailpiece Temp Indicated in Safety Relief Valves D & F in Target Rock Mode/Valves.Caused by Valve Leakage.Topworks Will Be Replaced During 1983 Refueling Outage (← links)
- 05000333/LER-1993-019, :on 930923,potential Design Inadequacies in Control Room Ventilation Sys Occurred.Caused by Inadequate Design Control & Documentation by Engineering Organizations. CRV Placed in Isolate Mode of Operation (← links)
- 05000333/LER-1991-001-01, :on 910109,false Primary Containment High Radiation Isolation Signal Occurred While Plant Operating at Full Power.Caused by Electrical Signal Noise.Panel Containing Radiation Monitors Inspected (← links)
- 05000333/LER-1982-049-03, /03L-0:on 821027,during Tech Spec Surveillance Requirement Review,Scram Discharge Vol Vents & Drains Not Cycled on Quarterly Basis.Caused by Supervisory Personnel Error.Addl Surveillance Procedure Developed (← links)
- 05000333/LER-1982-052-03, /03L-0:on 821110,HPCI Turbine High Exhaust Diaphragm Pressure Switch 23-PS-86B Setpoint Found to Be Less Conservative than Required Setting.Caused by Instrument Drift.Switch Setpoint Adjusted within Tech Spec Limit (← links)
- 05000333/LER-1990-028, :on 901227,technician Touched Volt Meter Probe Monitor Sample Pump,Causing Monitor to Spike High & Resulting in Isolation of Reactor Bldg Ventilation Sys. Caused by Personnel Error.Procedure Revised (← links)
- 05000333/LER-1982-045-03, /03L-0:on 821006,isolation Valves 02-39 & 40 Associated W/Penetration X-41 Failed to Isolate on All Signals.Caused by Failure to Update FSAR & Tech Specs to Reflect Change in Signals During Const.Valves Closed (← links)
- 05000333/LER-1990-027, :on 901215,reactor Scrammed During start-up Due to High Neutron Flux.Caused by Failure of Air Operator Diaphragm on Reactor Feedwater Low Flow Control Valve.Valve Repaired & start-up Procedure Revised (← links)
- 05000333/LER-1982-048-03, /03L-0:on 821020,number 4 Plant 115-kV Lines Removed from Svc for 2-h.Caused by Extension Cord Being Dropped Across Two Phases of Line.Line de-energized,fault Cleared & Line re-energized (← links)
- 05000333/LER-1982-046-03, /03L-0:on 821007,intermediate Range Monitor B Inoperative Trip Function Did Not Trip B Side RPS Logic on Simulated Downscale Signal.Caused by Failed Diode in Mean Squared Analog Mondule.Diode Replaced (← links)
- 05000333/LER-1990-035, :on 901115,three 3-inch Swing Check Valves Failed to Close During Testing Due to Corrosion & Silt Accumulation in Hinge Pin Mechanism.Valve Internals Replaced W/Stainless Steel Components (← links)
- 05000333/LER-1982-028-03, Drywell Equipment Drain Sump Flow Integrator Found Out of Calibr & Could Not Be Adjusted.Caused by Abnormal Friction in Drive Gear Train.New Gears Purchased to Rebuild Unit (← links)
- 05000333/LER-1993-022, :on 931029,wires Between RPS Scram Contractor Were Not Installed Inside Protective Conduits.Caused by Inadequate Design & Design Review.Corrective Action:Eight Resistors Were Relocated (← links)
- 05000333/LER-1982-042-03, /03L-0:on 820826,testing of Control Rod Hydraulic Control Unit Accumulator Pressure & Level Switches & Pressure Indication Revealed 68 of 411 Instruments Out of Calibr or Not Operating Properly.Caused by Instrument Drift (← links)
- 05000333/LER-1989-004, :on 890309,identified That Design Deficiency Potentially Affects Divs of safety-related Sys (← links)
- 05000333/LER-1994-001, :on 940224,HPCI Sys Had Declared Inoperable Due to Turbine Shaft Seal Leakage.Caused by Corrosion of Gland Seal Casing & Pitting.New Turbine Shaft Seals Installed.W/ (← links)
- 05000333/LER-1983-007-03, /03L-0:on 830201,while Testing Reactor Low Water Level Scram Switch 02-3-LIS-101D,setpoint Found Less Conservative than Tech Spec Requirement.Caused by Instrument Drift.Setpoint Adjusted.Test Frequency Increased (← links)
- 05000333/LER-1983-008-01, /01T-0:on 830202,error in Odyn Base Deck for Reload 4 Analysis Caused Delta Critical Power Ratios for Pressurization Transients to Be Nonconservative.Caused by Improper Data Input Due to Personnel Error (← links)
- 05000333/LER-1991-022-01, On 911015,spurious Primary Containment High Radiation Monitor a Isolation Signal Occurred.Cause Unknown. Filters Removed from Monitor Inputs Before Plant Restored to Prevent Trips (← links)
- 05000333/LER-1994-001-01, :on 940224,HPCI Sys Declared Inoperable Due to Minor Corrosion on Gland Seal Casing & Pitting of Turbine Shaft in Seal Area.New Turbine Shaft Seals Installed (← links)
- 05000333/LER-1981-026, Forwards LER 81-026/03L-0 (← links)
- 05000333/LER-1993-027-01, :on 931221,determined That Heat Detectors Located in SBGT Sys Filter Trains Not Being Functionally Tested.Caused by Inadequate Test Procedure Development, Review & Approval.Test Procedures Revised (← links)
- 05000333/LER-1994-002-01, :on 940222,setpoint Drift Discovered on Reactor Safety Relief Valves.Caused by Pilot Disc to Seat Corrosion Induced Bonding.Srv Pilot Assemblies Replaced (← links)
- 05000333/LER-1982-056-03, /03L-0:on 821215,LPCI Inverter a Tripped When Power Transferred to Maint Supply,Per Tech Spec 3.9.F. Redundant Sys Verified Operable.Caused by Failed Gate Timing Control Card.Card Returned to Vendor for Analysis & Repair (← links)
- 05000333/LER-1982-053-03, /03L-0:on 821208,during Surveillance Test of LPCI Independent Power Supply Battery B,One Cell Discovered Out of Spec Limits for Cell Voltage.Cause Not Stated.Defective Cell Removed & Replaced W/Temporary Jumper.Sys Restored (← links)
- 05000333/LER-1982-054-03, /03L-0:on 821213,difficulty Experienced in Initiating Trip on DPIS-76 & Venting Low Pressure Side of DPIS-77 During Surveillance Testing.Caused by Incomplete Instrument Surveillance Procedure.Procedure Revised (← links)
- 05000333/LER-1982-055-03, /03L-0:on 821214,turbine Steam High Flow Containment Isolation Switch 13-DPIS-84 Setpoint Found Less Conservative than Tech Specs.Caused by Instrument Drift. Setpoint Adjusted to within Required Value (← links)
- 05000333/LER-1982-058-04, /04T-0:on 821217,defected Mn-54 Level in Mollusk Samples Exceeded 10 Times Control Location Sample Level. Possibly Caused by High Bioaccumulation Factor,Resulting in Accumulation of Trace Quantities in Mollusks (← links)
- 05000333/LER-1982-041-03, /03L-0:on 820803,removal of Wrong Fuses During Surveillance Test Caused Both Standby Liquid Control Sys Squib Valves to Be Actuated.Operator Responsible for Pulling Wrong Fuses.Ler Will Be Included in Operator Training (← links)
- 05000333/LER-1982-034-03, /03X-1:on 820713,instrument Flow Components Drift Resulted in Nonconservative Calculation of Core Thermal Power.Rated Thermal Power Limit Exceeded on Approx 75 Days of Cycle 5 Operation.Caused by Instrument Drift (← links)
- ML072260420 (redirect page) (← links)
- 05000333/LER-1995-009, :on 950425,partial Invalid Isolation of Reactor Bldg Ventilation Occurred Due to Jumper Sliding Off Terminal & Striking Nearby Cable Connector.Continued W/Existing Mod Intended to Improve Attachment of Jumpers (← links)
- 05000333/LER-2007-002, (Jaf) Re Manual Reactor Scram Due to Blocked Circulating Water Intake Screens (← links)