Pages that link to "05000333/LER-2020-001, Automatic Scram Due to Main Turbine Trip on High RPV Water Level"
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The following pages link to 05000333/LER-2020-001, Automatic Scram Due to Main Turbine Trip on High RPV Water Level:
Displayed 2 items.
- ML20091L895 (redirect page) (← links)
- 05000333/LER-2020-001 (redirect page) (← links)
- 05000333/LER-2014-001 (← links)
- 05000333/LER-2014-002 (← links)
- 05000333/LER-2015-001 (← links)
- 05000333/LER-2015-002 (← links)
- 05000333/LER-2015-003 (← links)
- 05000333/LER-2015-005 (← links)
- 05000333/LER-2015-006 (← links)
- 05000333/LER-2015-008 (← links)
- 05000333/LER-2012-001 (← links)
- 05000333/LER-2012-002 (← links)
- 05000333/LER-2012-004 (← links)
- 05000333/LER-2012-005 (← links)
- 05000333/LER-2012-006 (← links)
- 05000333/LER-2012-007 (← links)
- 05000333/LER-2012-008 (← links)
- 05000333/LER-2012-009 (← links)
- 05000333/LER-2012-010 (← links)
- 05000333/LER-2013-001 (← links)
- 05000333/LER-2013-002 (← links)
- 05000333/LER-2013-003 (← links)
- 05000333/LER-2013-004 (← links)
- 05000333/LER-2013-005 (← links)
- 05000333/LER-2013-006 (← links)
- 05000333/LER-2016-005 (← links)
- 05000333/LER-2016-004 (← links)
- 05000333/LER-2016-003 (← links)
- 05000333/LER-2016-002 (← links)
- 05000333/LER-2016-001 (← links)
- 05000333/LER-2015-007 (← links)
- 05000333/LER-2012-003 (← links)
- 05000333/LER-2011-003 (← links)
- 05000333/LER-2011-002 (← links)
- 05000333/LER-2011-001 (← links)
- 05000333/LER-2010-001 (← links)
- 05000333/LER-2009-002 (← links)
- 05000333/LER-2009-001 (← links)
- 05000333/LER-2008-004 (← links)
- 05000333/LER-2008-003 (← links)
- 05000333/LER-2008-002 (← links)
- 05000333/LER-2008-001 (← links)
- 05000333/LER-2007-002 (← links)
- 05000333/LER-2007-001 (← links)
- 05000333/LER-2006-002 (← links)
- 05000333/LER-2006-001 (← links)
- 05000333/LER-2005-006 (← links)
- 05000333/LER-2005-005 (← links)
- 05000333/LER-2005-004 (← links)
- 05000333/LER-2005-003 (← links)
- 05000333/LER-2005-002 (← links)
- 05000333/LER-2005-001 (← links)
- 05000333/LER-2004-001 (← links)
- 05000333/LER-2003-002 (← links)
- 05000333/LER-2003-001 (← links)
- 05000333/LER-2015-004 (← links)
- 05000333/LER-2009-008 (← links)
- 05000333/LER-2009-007 (← links)
- 05000333/LER-2009-006 (← links)
- 05000333/LER-2009-005 (← links)
- 05000333/LER-2009-004 (← links)
- 05000333/LER-2002-001 (← 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)
- 05000333/LER-2017-001 (← 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-1982-014, Forwards LER 82-014/03X-1 (← 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-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000333/LER-1982-023, Forwards LER 82-023/03L-0 (← 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-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-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000333/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000333/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000333/LER-1983-001, /04T-0:on 821230,number of Fish Impinged Over 24 H Period Exceeded 20,000.Previous Impingement Samples Measured Less than 100 fish/24 H.Caused by Bad Weather Conditions During 821229-30.Submittal Replaces LER 83-001 (← 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-1982-034, Forwards LER 82-034/03X-1 (← links)
- 05000333/LER-1981-033, Forwards LER 81-033/03L-0 (← links)
- 05000333/LER-1982-021, Forwards LER 82-021/03X-1 (← links)
- 05000333/LER-1982-040, Forwards LER 82-040/04T-0 (← links)
- 05000333/LER-1982-035, Forwards LER 82-035/03L-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-1982-030, Forwards LER 82-030/03L-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-1982-044, 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-1991-007, Revises Projected Completion Date for Submittal of Root Cause Analysis for LER 91-007-00 Re Scram While in Shutdown Due to Level Instrument Calibr from End of 1991 Refuel Outage to 920515 (← 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-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-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)
- IR 05000333/2020002 (← 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-1922-003-01, Safety Relief Valves Lift Setpoint Found Out of Tolerance Low (← 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-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-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-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-1987-018, :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-1985-028, :on 851213 & 16 HPCI Isolation Occurred Due to Trip Unit Failure.Mfg Evaluation Determined That Dirty Trip Setpoint Poteniometer Was Most Likely Cause.Master Trip Unit Replaced (← 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-1988-010, :on 881029,vendor Advised Util That Two of Seven Safety Relief Valves Failed as-found Actuation Test. Caused by Pilot Valve Disc & Seat Bonding or Pilot Valve Leakage Due to Steam Cutting.Valves Replaced (← links)
- 05000333/LER-1987-013, :on 870905,spurious Trip Unit Gross Failure Alarm & Auto Isolation of RCIC Sys Occurred.Cause Undetermined.Transmitter & Master Trip Unit Replaced & Cabinet Terminal Block Connection Checked (← 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-1987-004-01, Responds to Open Items in Insp Repts 50-333/85-022 & 50-333/83-04 & LER 87-004-01 & Provides Summary of 2-stage Target Rock Safety Relief Valve Setpoint Issue,Per Resident Inspector Request (← 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-1997-005-01, Forwards LER 97-005-01 Re Manual Reactor Scram Due to Failure of Number 3 Turbine Control Valves.Revised LER Submitted to Include Addl Corrective Actions (← links)
- 05000333/LER-1987-003, :on 870219,during 1987 Refueling Outage,Hpci Turbine Throttle Valve Bolts Discovered Broken.Caused by Stress Corrosion Cracking & Improper Heat Treatment.Bolts Replaced & Vendor Consulted on Event (← links)
- 05000333/LER-1998-015, :on 981211,identified Logic Sys Functional Test Inadequacies.Caused by Personnel error.Re-review of Surveillance Testing for EDG Sys to Ensure TS Surveillance Tests Adequate,Scheduled to Be Completed by Jan 15, 2000 (← 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-1986-008, :on 860327 & 1005,reactor Protection Sys Reactor High Pressure Permissive Instrument Channels Found to Actuate at Greater than Tech Spec Value of 1,005 Psig. Caused by Instrument Drift.Switch Adjusted (← links)
- 05000333/LER-1985-027, :on 851122,two Outboard MSIVs Found Inoperative During Surveillance Test.Caused by Failure of Stroke Time Adjusting Device in MSIV B & Failure of Cartridge Retainer Cap Screws in MSIV D.Repairs Performed (← links)
- 05000333/LER-1986-013, :on 860703,reactor Scram Occurred Due to Turbine Stop Valve Closure.Caused by GE PK-2 Test Block Failure.Test Blocks in Switchyard Inspected & Two Replaced. Replacement Program Under Consideration (← links)
- 05000333/LER-1986-005, :on 860404,RCIC Isolation & Turbine Trip Occurred.Caused When Ground Circuits Internal to Panel Not Connected Per Mfg Recommendations.Analog Ion Transmitter Trip Sys Will Be Modified (← 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-1987-001, :on 870118,drywell Inerting and Purge Sys Primary Containment Penetration X31Ad Found with Leakage of 11757.9 Std Cubic Feet Per Day During Local Leak Rate Testing.Valve Repairs Scheduled (← 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-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-1998-015, :on 981211,logic Sys Functional Test Inadequacies Were Noted.Caused by Personnel Error.Revised ST-9P, Functional Test of Breakers 10514 & 10516 EDG Logic Auxiliary Stationary Contact. with (← 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-1999-001-01, 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-1987-003, :on 870219,during Maint Insp of HPCI Terry Turbine,Broken Bolts Discovered Associated W/Turbine Throttle Valves Lifting Beam.Cause Undetermined.Bolts Replaced.Vendor Consulted (← links)
- 05000333/LER-1986-005, :on 860404,RCIC Isolation & Turbine Trip Occurred Twice Causing ESF Actuations.Caused by Erroneous High Ambient Temp Signals.Signals Reset Immediately & RCIC Normalized (← 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-1986-008, :on 860327,reactor Protection Sys High Pressure Permissive Instruments (Asco Model SB12BR/TM10A32R) Actuated Above Tech Spec Limits.Cause Undetermined.Switch Adjustments Made (← 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-1997-011-01, :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-1988-010, :on 881029,reactor Safety Relief Valve Setpoint Drift Discovered.Cause Unknown.No Corrective Action Necessary (← 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-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-1987-011, :on 870728,discovered Numerous Electrical Conduit & Floor/Wall Penetrations in 10CFR50,App R Fire Barriers Not Sealed w/3-h Fire Rated Seal.Caused by Use of Incomplete Penetrations List.Seals Installed (← 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-1997-005-01, :on 970525,manual Reactor Scram Occurred Due to Failure of Number 3 Turbine Control Valve.Replaced Valve Spring Can Coupling Bolt on Four TCVs & Four Combined Intermediate Valves (Civs) (← 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-1987-013, :on 870905,spurious Trip Unit Gross Failure Alarm & Auto Isolation of RCIC Sys Occurred.Cause of Failure Could Not Be Determined.Sys Monitored for 24 H W/O Gross Failure.Sys Returned to Svc on 870907 (← 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-1985-027, :on 851122,two Outboard MSIVs Found Inoperable During Stroke Time Testing.Outboard D Failure Caused by Sliver of Brass in Air Pilot Valve Due to cross-threading of Air Line.Outboards Repaired (← links)
- 05000333/LER-1997-001-01, :on 970123,manual Reactor Scram Occurred Due to Fouling of Circulating Water Sys Traveling Screens.Revised Procedure OP-4, Circulating Water Sys & Evaluated Adequacy of Shear Pins Used on Screens (← 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-1985-028, :on 851213 & 16,Div II HPCI High Ambient Temp Isolations Occurred.Cause Undetermined.Master Trip Unit Replaced (← 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-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-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-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-1992-001-01, :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-1991-028, :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-1991-016, :on 910911,turbine Bldg Exhaust Iodine & Particulate Sample Pump Found Out of Svc.Caused by Personnel Removing Pump for Preventive Maint.Auxiliary Sampler Installed in Place of out-of-svc Pump (← 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-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-1984-010, :on 840325,scram Occurred.Caused by Low Reactor Vessel Level,Causing Loss of Single Operating Reactor Feed Pump Due to Control Oil Leak.Reactor Feed Pumps Will Be Considered for Inclusion in QA Program (← 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-1991-015, :on 910819,high Pressure Coolant Injection Sys Inoperable.Caused by Slow Response Time Due to Changed Hydraulic Valve Setting Due to Deficient Procedure. Relief Valve Setpoint Adjusted (← 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-1995-006, :on 950315,reactor SRV Setpoint Drift Occurred Due to Corrosion Bonding Between SRV Pilot Disc & Pilot Seat.Pilot Assemblies Replaced W/Refurbished & Recertified 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-1983-049-03, /03L-0:on 831022,stem of HPCI Turbine Stop Valve Fractured Near Valve Operator Coupling.Sys Declared Inoperable.Cause Unknown.Stem Replaced.Failed Stem Sent to Bmi for Analysis (← 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-1995-004, :on 950222,0303,11,15 & 16,logic Sys Functional Test Procedure Deficiencies Identified Due to Personnel Errors.Action Plan Developed to Identify & Resolve Any Addl Logic Testing Deficiencies (← 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-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-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-1995-001-01, :on 950106,pilot Assemblies for Six Safety Relief Valves Were Removed for Testing & Recertification. Initial Lift Setpoint Drift Was High for All Pilot Mechanisms & SRV Pilot Were Replaced (← 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-1991-009-01, :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-1991-022, :on 900910,ESF Actuation Occurred.Caused by Low Voltage Trip of Power Supply to Reactor Protection Sys Bus Due to Procedural Deficiency.Corrective Action Included Replacement of Voltage Regulator Boards (← 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-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-1992-008, :on 920129,discovered Primary Containment Isolation Valve Stem Packing Not Subjected to Local Leak Rate Testing Following Maint on Valves.Caused by Inadequate Procedure.Procedure Revised (← 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-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)