Pages that link to "05000368/LER-2019-001, Reactor Trip Due to a Reactor Coolant Pump Motor Failure"
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The following pages link to 05000368/LER-2019-001, Reactor Trip Due to a Reactor Coolant Pump Motor Failure:
Displaying 2 items.
- ML19204A311 (redirect page) (← links)
- 05000368/LER-2019-001 (redirect page) (← links)
- 05000368/LER-2013-002 (← links)
- 05000368/LER-2001-002 (← links)
- 05000368/LER-2001-001 (← links)
- ENS 54091 (← links)
- IR 05000313/2019003 (← links)
- 05000368/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000368/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000368/LER-1982-011, Forwards LER 82-011/99X-0 (← links)
- 05000368/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000368/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000368/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000368/LER-1982-030, Forwards LER 82-030/01T-0 (← links)
- 05000368/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000368/LER-1978-003, Forwards LER 78-003/03L-0 (← links)
- 05000368/LER-1982-027, Forwards LER 82-027/-3L-0 (← links)
- 05000368/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000368/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000368/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000368/LER-1982-019, Forwards LER 82-019/03L-0 (← links)
- 05000368/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000368/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000368/LER-1982-025, Forwards LER 82-025/03L-0 (← links)
- 05000368/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000368/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000368/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000368/LER-1982-052, Forwards LER 82-052/01T-0 (← links)
- 05000368/LER-1982-042, Forwards LER 82-042/01T-0 (← links)
- 05000368/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000368/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000368/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000368/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000368/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000368/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000368/LER-1982-031, Forwards LER 82-031/01T-0 (← links)
- 05000368/LER-1983-009, Forwards LER 83-009/01T-0 (← links)
- 05000368/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000368/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000368/LER-1978-024, Forwards LER 78-024/03L-0,78-025/03L-0 & 78-026/03L-0 (← links)
- 05000368/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000368/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000368/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000368/LER-1994-001, Forwards Rev 1 to LER 94-001 Re Excore Nuclear Instrumentation.Rev Revises Commitment Re Future post-maint Testing Method Used to Verify Continuity of Cable Connectors (← links)
- 05000368/LER-1983-020, Telecopy LER 83-020/01T-0:on 830519,fire Watch Posted in Wrong Location for Period Exceeding Tech Spec Limit.Further Details Will Be Provided (← links)
- 05000368/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000368/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000368/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000368/LER-1983-019, Forwards LER 83-019/03L-0 (← links)
- 05000368/LER-1979-026, Oversize Updated LER 79-026/03X-1:on 790323,fire Dampers Not Installed Per Design Specs.Caused by Installation Qa.Fire Dampers Cited Installed as Required.Aperture Card Available in PDR (← links)
- 05000368/LER-1995-001, Provides Comments on Preliminary Accident Sequence Analysis Re LER 95-001-00 (← links)
- 05000368/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000368/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000368/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000368/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000368/LER-1979-058, Forwards LER 79-058/03L-0 (← links)
- 05000368/LER-1983-014, Forwards LER 83-014/01T-0 (← links)
- 05000368/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000368/LER-1998-004, Forwards LER 98-004-00,concerning Surveillance Tests of Fuel Handling Area & Containment Purge & Exhaust Fan Flow Rates (← links)
- 05000368/LER-1998-001, Forwards LER 98-001-00,concerning Surveillance Testing of Containment Building Personnel & Escape Air Lock Door Interlocks (← links)
- 05000368/LER-1986-000, Forwards Corrected LER 86-00-00 Re Inadvertent Reactor Protection Sys Actuation During Surveillance Testing.Ltr Should Be Disregarded (← links)
- 05000368/LER-1985-022, Corrects Forwarding LER 85-022-00.Unit,docket & License Number Incorrectly Listed on Cover Ltr 2CAN118503 (← links)
- 05000368/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000368/LER-2021-002, Material Defect in Primary Coolant System That Cannot Be Found Acceptable Under American Society of Mechanical Engineers Section XI (← links)
- 05000368/LER-2021-001, Non-Compliance with Technical Specifications Resulting in Lack of Nuclear Instrumentation Audible Indication (← links)
- 05000368/LER-2020-001, Loss of Feedwater Control System Power for Train a Feedwater That Resulted in Plant Trip (← links)
- 05000368/LER-1998-002-04, :on 980520,EFAS Automatically Actuated to Maintain Water Level in a Sg.Caused by Inadequate self- Checking of Plant Response by Control Room Operations Personnel.Operations Personnel Counseled (← links)
- 05000368/LER-1998-003-01, :on 980520,determined That Surveillance of Control Element Assembly Position Was Not Being Performed for One Control Element Assembly Group,Per Ts.Caused by Inadequate Verification.Change Implemented (← links)
- 05000368/LER-1989-016-01, :on 890903 & 18,continuous Fire Watch to Monitor Nonfunctional Fire Barriers Removed Due to High Airborne Activity.Caused by Failure to Establish Contingencies.Tech Spec Change Issued (← links)
- 05000368/LER-1989-004, :on 890301,discovered Plant Startup Procedure Inadequate Resulting in Inability to Automatically Transfer HPSI Pump Suction Prohibited by Tech Specs.Caused by Inadequate Procedure.Procedures Revised (← links)
- 05000368/LER-1986-018, :on 860720,discovered Blowdown Pipe Missing Required Pipe Whip Restraint.Caused by Inadequate Control of Deviations from Design Requirements During Original Const. Pipe Whip Restraint Installed (← links)
- 05000368/LER-1988-023-01, :on 880219,inoperability of Mechanical Snubber on Main Steam Supply Piping Discovered.Caused by High Dynamic Loading of Piping & Snubber Due to Water Entrainment in Steam Piping.Snubber Replaced (← links)
- 05000368/LER-1986-017, :on 860604,discovered That Required Type C Testing of Containment Isolation Valves Not Performed Resulting in Noncompliance W/Tech Specs.Caused by Personnel Error.Actions Taken to Test Affected Valves (← links)
- 05000368/LER-1989-003-01, :on 890216,personnel Determined That Valve Associated W/Train a Hydrogen Analyzer Exceeded Environ Qualification Parts Replacement Interval Since 1983.Caused by Personnel Error.Components Replaced (← links)
- 05000368/LER-1989-008-01, :on 890506,overspeed Trip of Steam Turbine Driven Emergency Pump Occurred.Caused by Degraded Ramp Generator.Ramp Generator Replaced & Entire Speed Circuit Calibr (← links)
- 05000368/LER-1988-016, :on 880920,Tech Specs Limit for Containment Spray Sys Train B Actuation Response Time Exceeded.Caused by Inadequate Procedures.Procedures for Routine Periodic Response Time Testing Revised for Discrepancy (← links)
- 05000368/LER-1987-010, :on 870522,plant Protection Sys Panels Seismic Qualification Compromised Due to Loose Fasteners.Caused by Personnel Error When Personnel Elected Not to Tighten All Screws.Personnel Counseled (← links)
- 05000368/LER-1989-001-01, :on 890503,reactor Protective Sys Instrumentation Declared Inoperable Due to Channel Failing Low Intermittently.Caused by Misinterpretation of Procedure. Procedural Guidance Will Be Issued (← links)
- 05000368/LER-1984-018, :on 840618,Train B of Sodium Hydroxide Addition Sys Discovered Inoperable During Monthly Surveillance Test. Caused by Personnel Error.Administrative Procedure Revised to Provide Clarification (← links)
- 05000368/LER-1986-016, :on 860617,pressurizer Low Pressure Trip Remained Bypassed at Pressure Greater than Allowed.Caused by Personnel Error Resulting in Inadequate Procedure.Plant Protection Sys Calibr Procedures Revised (← links)
- 05000368/LER-1986-015, :on 860801,review of Fire Barrier Penetration Log Identified 55 Penetrations Not Inspected within Tech Spec Required Interval.Caused by Inadequate Procedure & Personnel Error.Log & Test Procedures Revised (← links)
- 05000368/LER-1987-002, :on 870213,discovered Degraded Fire Barriers Due to Installation of Improper Seal Matl in Seismic Gap Separating Adjacent Bldgs.Caused by Inadequate Instructions During Const Phase.Fire Watch Established (← links)
- 05000368/LER-1988-022-01, :on 881103,two Discrepancies Noted in DBA Assumptions Used in Evaluations to Demonstrate Environ Qualification of Equipment in Containment.Caused by Lack of Clearly Defined Basis of Accident Analysis (← links)
- 05000368/LER-1986-006, :on 860421,inadvertent Actuation of Reactor Protective Sys Occurred.Caused by Channel a Sys Departure from Nucleate Boiling Ratio & High Local Power Density Trip Functions Bypassed During Shutdown Operations (← links)
- 05000368/LER-1986-020, :on 860712,discovered That Time Delay Function Associated W/Feeder Circuit Breaker from ESF Bus to Svc Water Pump Inoperable.Caused by Not Removing Jumper Wire. Jumper Wire Removed & Drawings Revised (← links)
- 05000368/LER-1989-010, :on 890425,discovered That Valve Stroke Surveillance Test for LPSI Sys & Refueling Water Tank Had Not Been Performed.Caused by Personnel Incorrectly Indicating Tests as Already Performed (← links)
- 05000368/LER-1986-014, :on 860627,emergency Diesel Generator Failed. Caused by Engine Fuel Starvation Due to Severely Fouled Y- Strainer 2F-195B Screen Element.Mesh Screen Internals of Y-strainers Removed (← links)
- 05000368/LER-1984-015, :on 840302,discrepancy in Fire Barrier Penetration 2099-0002,which Previously Evaluated Acceptable, Identified as Nonfunctional.Caused by Lack of Definitive Guidelines in Walkdown Program (← links)
- 05000368/LER-1989-007, :on 890424,snubber on Valve (2CV-4653) on Pressurizer Spray Line Found Disconnected While Performing Inservice Insp of Mechanical Snubbers.Caused by Inadequate Work Controls.Snubber on 2CV-4653 Replaced (← links)
- 05000368/LER-1989-006, :on 890418,high Pressure Turbine Extraction Ruptured Resulting in Reactor Trip on High RCS Pressure. Caused by Pipe Wall Thinning Due to erosion-corrosion. Defective Wiring Replaced & Sys Satisfactory (← links)
- 05000368/LER-1989-009-01, :on 890420,determined That Emergency Diesel Generator 18-month Test Procedure Did Not Verify Fuel Pump Transfer Capabilities.Caused by Personnel Error.Procedure to Be Revised (← links)
- 05000368/LER-1989-015-01, :on 890809,personnel Identified Discrepancy Re Single Failure Design Criterion of Containment Hydrogen Analyzers.Caused by Inadequate Design Review Process. Evaluations Being Conducted to Correct Design (← links)
- 05000368/LER-1989-014-01, :on 870710,discovered That Portions of Piping & Supports,Associated W/Auxiliary Spray Piping Designed to Max Temp of 120 Degrees Instead of Possible Temp of 479 Degrees. Caused by Error in Analysis.Insp Performed (← links)
- 05000368/LER-1989-011-01, :on 890608,discovered That Fire Door Separating Plant Fire Areas Being Propped Open W/O Fire Watch Stationed as Required by Tech Specs.Caused by Personnel Error.Fire Door Opened.Periodic Training Provided (← links)
- 05000368/LER-1989-012-01, :on 890626,RCS Backleakage Through Safety Injection Sys Check Valve Occurred Three Times.Caused by Missing Internal Parts.Cause of Missing Rollpins Could Not Be Determined.Rollpins Replaced (← links)
- 05000368/LER-1988-020, :on 881201,reactor Tripped When Spurious Safety Injection Actuation Signal/Containment Cooling Actuation Signal Generated.No Root Cause for Spurious Actuation Could Be Determined.Surveillance Procedure Reviewed (← links)
- 05000368/LER-1989-005-01, :on 890518,25 & 31,void Found in Silicone Foam Matl.Caused by Inadequate Procedural Guidance to Ensure Voids Not Present in Sealing Matl After Installation.Repairs Initiated to Restore Seals to Working Order (← links)
- 05000368/LER-1985-028, :on 851025,procedure for Safety Injection Tanks Identified as Allowing cross-connecting of Safety Injection Tanks Via Nonseismic Piping of Nitrogen Addition Sys for Tanks.Caused by Personnel Error (← links)
- 05000368/LER-1987-012, :on 870511,discovered Low Temp Overpressure Sys Relief Valves Deviated from Configurations Shown on Piping Isometric Drawings.Caused by Lack of Programmatic Mod Controls.Snubber Clamp Replaced (← links)
- 05000368/LER-1986-019, :on 860618,during Inservice Insp & Testing 34 Snubbers Discovered to Be Inoperable.Caused by Problems, Including vibration-induced Wear,Dirt Intrusion,Excessive Lubrication & Excessive Heating (← links)
- 05000368/LER-1987-011, :on 870727,discovered That Instrumentation for Shutdown Cooling Sys Flow Rate Did Not Meet Requirements of Tech Spec 3.3.3.5.Caused by Personnel Error.Plant Mod Developed & Installed (← links)
- 05000368/LER-1987-008, :on 871114,high Bearing Vibrations on Main Turbine Journal Bearing Tripped Main Turbine & Reactor. Caused by Incorrect Trip Setpoint.High Vibration Setpoint Corrected & Sys Recalibr (← links)
- 05000368/LER-1987-009, :on 871114,subcritical Reactor Trip Occurred While Performing Reactor Shutdown.Caused by Procedural Deficiency.Proper Actuation of Reactor Protection Sys Verified.Procedure Will Be Revised (← links)
- 05000368/LER-1998-005-01, :on 980722,discovered That Surveillance Test of Sodium Hydroxide Addition Pump Was Not Performed as Required by Ts.Caused by Deficiencies in Test Procedure.Procedure Revised (← links)
- 05000368/LER-1998-004-01, :on 980612,surveillance Tests of Fuel Handling Area & Containment Purge & Exhaust Fan Flow Rates Were Not Performed as Required by Ts.Caused by Procedure Change Deficiency.Fans 2VEF-14A & B & 2VEF-15 Declared Inoperable (← links)
- 05000368/LER-1989-002, :on 890109,discovered That Tech Spec Required 14-day Periodic Surveillance Test for Svc Water Flow Rate to Containment Cooling Units Not Performed.Caused by Personnel Error.Personnel Counseled (← links)
- 05000368/LER-1987-007, :on 870909,reactor Trip on High RCS Occurred. Caused by Failure of Terminal Lug Connecting B phase,120 Volt Ac Electrical Cable to Secondary Side of Transformer 2X11.Repairs Performed (← links)
- 05000368/LER-1988-018, :on 880922,breached Penetration Identified in Tech Specs Fire Barrier Wall FB-2081-02.In Dec 1983,breach Found Acceptable Due to Penetration Sealed on Opposite Side of Adjacent Wall.Caused by Personnel Error (← links)
- 05000368/LER-1988-019, :on 881111,during Disassembly of Svc Water Pump A,Failure of Some of Impeller Snap Rings Discovered. Caused by Corrosion of Impeller Carbon Steel Snap Rings Due to Exposure of Chlorinated Lake Water (← links)
- 05000368/LER-1997-008-01, :on 971002,determined That Surveillance Test in 1996 May Have Resulted in Degraded SG Tubes Being Left in Svc Contrary to Requirements of Tech Specs.Caused by Personnel Error.Training Process Implemented (← links)
- 05000368/LER-1999-005-02, :on 990831,two Trip Functions of One Core Protection Calculator Channel Potentially Inoperable Longer than TS Allow Was Discovered.Caused by Resistance Fluctuations.Util Plans to Replace Switch.With (← links)
- 05000368/LER-1997-006, :on 970606,inadvertent Start of EDG Start Occurred.Caused by Inadequate Written Communication Re Job Order Instructions.Job Order & Appropriate Procedures Revised (← links)
- 05000368/LER-1998-001-02, :on 980309,surveillance Testing of Containment Bldg Personnel & Escape Air Lock Door Interlocks Did Not Verify Operability of Each Interlock Function.Caused by Inappropriate Interpretation.Revised Maint Task Documents (← links)
- 05000368/LER-1987-005, :on 870501,containment Isolation Valve Inoperable.Caused by Personnel Error.Maint Personnel Counseled on Importance of Assuring Proper Reinstallation of Seismic Supports (← links)
- 05000368/LER-1987-004, :on 870425,while Performing Plant Cooldown, Reactor Protection Sys Actuation Occurred Due to High Water Level in Steam Generation A.Caused by Personnel Error. Procedure Revised (← links)
- 05000368/LER-1986-013, :on 860806,containment Bldg Pressure Transmitter Inoperable Due to Discrepancy in Installation of Conduit Containing Electrical Cables.Caused by Loose Fitting & Lack of Thread Sealant (← links)
- 05000368/LER-1986-011, :on 860924,reactor Tripped Form 100% Power on High Reactor Coolant Sys Pressure Following Main Turbine Trip.Incorrectly Assembled Valve Believed to Be Contributing Factor.Valve Reassembled Properly (← links)
- 05000368/LER-1986-007, :on 860426,automatic Reactor Trip Occurred Due to Ground Fault Trip of Reactor Coolant Pump Breaker.Maint Check of Reactor Coolant Pump Motor,Power Leads & Breaker Initiated (← links)
- 05000368/LER-1986-004-01, :on 860421,unit Tripped from 100% Power Due to Core Protection Calculator Generated Low Departure from Nucleate Boiling Ratio Trip in 2 of 4 Channels of Reactor Protective Sys (← links)
- 05000368/LER-1986-005, :on 860421,reactor Protective Sys Actuated on Two of Four Core Protection Calculator Channels.Caused by Electrical Noise Generated from Reactor Coolant Pump (RCP) Start.Rcp Surge Capacitors Replaced (← links)
- 05000368/LER-1987-001, :on 870130,field Engineer Discovered Two Fire Barrier Penetrations Not Sealed as Required.Caused by Personnel Error While Performing Plan Mod.Fire Watches Posted & Personnel Scheduled for Training (← links)
- 05000368/LER-1999-001, :on 990108,TS Requirements for as-lift Settings of MSSV Were Not Met.Caused by Errors in Determination of Effective Seating Area by Vendor During Test Device Qualification.Replaced All Mssvs.With (← links)
- 05000368/LER-1986-009, :on 860613,automatic Reactor Trip Occurred During Control Shutdown for Refueling.Caused by out-of-range Axial Shape Index.Reactor Trip/Functions of Operating Procedures Verified (← links)
- 05000368/LER-1999-002-01, :on 990202,noted Failure to Verify Station Battery cell-to-cell & Terminal Tightness.Caused by Inadvertent Omission of Requirements During Procedure Revs. Svc Test Procedures Were Revised.With (← links)
- 05000368/LER-1999-004-01, :on 990414,noted That Two Trip Functions of One Core Protection Calculator Channel Were Potentially Inoperable.Caused by Excore Detector Drift.Affected Trip Functions Have Remained Bypassed or Tripped.With (← links)
- 05000368/LER-1986-008, :on 860430,util Discovered Penetration Fire Barriers for Piping Penetration Room Had Not Been Surveilled for 18-month Interval.Breach in Barrier Found on 860501.Breach Sealed.Procedures Revised (← links)
- 05000368/LER-1988-017, :on 881005,discovered That Periodic Surveillance Test of Containment Cooling Units Not Performed Prior to Exceeding Max Allowable Time.Caused by Personnel Error.Surveillance Testing Initiated (← links)
- 05000368/LER-1999-003, :on 990224,noted That One Excore Nuclear Instrumentation Channel Was Inoperable Longer than Allowed by Ts.Caused by Detector Failure.Proposed Exigent TS Change Was Submitted to Allow Operation.With (← links)
- 05000368/LER-1999-001-01, :on 990108,four Main Steam Safety Valves as- Found Lift Values Failed to Meet TS Requirements.Cause of Evaluation in progress.Short-term & long-term Corrective Actions Will Be Described in Suppl to Rept.With (← links)
- 05000368/LER-1996-004, :on 961030,deficient Failures Modes & Effects Analysis for DC Electrical Sys Resulted in Unavailability of Automatic Functions of Plant Protective Sys.Established Administrative Controls to Prevent Bypass of Channel (← links)
- 05000368/LER-1996-004-02, Forwards LER 96-004-02 IAW 10CFR50.73(a)(2)(ii)(B).Suppl Provides Revised Schedule for Implementation of Plant Design Change (← links)
- 05000368/LER-1986-002-01, :on 860227,nonconservative Error Discovered in Analysis of Samples from Charcoal Filters in Ventilation Sys.Caused by Inadequate Technical Review of Procedure.No Corrective Actions Will Be Taken (← links)
- 05000368/LER-1998-008-01, :on 981215,one CR Emergency Chiller,Part of CREVS Discovered to Be Inoperable,While Chiller in Other Train Was Out of Svc for Planned Maint.Caused by Equipment Failure.Operations Personnel Verified.With (← links)
- 05000368/LER-1985-020, :on 850919,reactor Protection Sys Actuated on Two of Four Channels,Resulting in Opening of Reactor Trip Circuit Breakers.Caused by Personnel Error.Technician Counseled Re Procedures (← links)
- 05000368/LER-1988-007, :on 880423,inadvertent Plant Protection Sys (PPS) Actuation Occurred When Maint Technician Deenergized Power Supply to Sys.Caused by Personnel Error.Technician Reset PPS & Counseled (← links)
- 05000368/LER-1988-008, :on 880504,loss of All RCS Normal Makeup/ Emergency Boration Capability Occurred Due to Gas Binding of Charging Pumps.Caused by Leak on Threaded Fitting of Water Level Transmitter.Fitting Repaired (← links)
- 05000368/LER-1988-015, :on 880801,manual Reactor Trip & Cooldown Initiated Following Failure of Reactor Coolant Pump Seal Cavity Pressure Sensing Instrument Line Which Resulted in RCS Leak of Approx 20 Gpm (← links)
- 05000368/LER-1988-009, :on 880501,discovered That Tech Spec Drop Time Limit for Control Element Assembly (CEA) Insertion Not Met for Certain Ceas.Caused by Deficiency in Method for Testing. Emergency Amend Request Submitted (← links)
- 05000368/LER-1988-014, :on 880822,control Room Ventilation Sys Radiation Monitor High Alarm Actuated,Causing Automatic Isolation of Sys.Caused by Procedural Inadequacy.Job Order Issued to Check & Adjust Setpoint (← links)
- 05000368/LER-1998-007, :on 981005,min Shift Crew Composition Was Not Maintained.Caused by Inadequate Training to Instructors on Use of Scantron Grading Machine.Provided Training on Scantron Machine & Revised Procedures.With (← links)
- 05000368/LER-1985-002, :on 850120,discovered That Two of Four Refueling Water Tank Level Transmitters Failed High.Caused by Inadequate Freeze Protection for Level Instrumentation. Transmitters & Sensing Lines Thawed (← links)
- 05000368/LER-1986-001-01, :on 860211,MSIV 2CV-1010 a Spuriously Closed, Resulting in Reactor Trip & Insertion of Control Element Assemblies.Caused by Malfunction in motor-driven Relay (Mdr).Mdr Replaced & Tested (← links)
- 05000368/LER-1988-011, :on 880801,notification of Unusual Event Declared & Manual Reactor Trip & Plant Cooldown Performed Due to Sensing Line Failure.Caused by Low Stress,High Cycle & Weld Fatigue Failure.Welds Modified (← links)
- 05000368/LER-1998-006-01, :on 980805,noted That Automatic Removal of Operating Bypasses for Logarithmic Power High Trip & CPC Trips Were Not within Required Values of Tss.Caused by Inaccurate Wording.Submitted TS Change Request (← links)
- 05000368/LER-1985-007, :on 850311,failure of Fire Door 448 to Meet Insp Acceptance Criteria Discovered.Caused by High Usage. Door Repaired.Frequency of Fire Door Insps for High Use Doors Implemented (← links)
- 05000368/LER-1988-006, :on 880402,cable Spreading Room Fire Water Sys Removed from Svc to Prevent Inadvertent Actuation.Caused by Const Activities in Area.Continuous Fire Watch Established Prior to Removal (← links)
- 05000368/LER-1985-024, :on 851119,insp of 1-inch Expansion Gaps Between Auxiliary Bldg Floors & Reactor Bldg Wall Revealed That Sealing Matl Suffered Physical Degradation.Fire Watch Posted.Work on Sealing Gap Initiated (← links)
- 05000368/LER-1988-013, :on 880223,inoperable RCS High Point Vent Sys Mechanical Snubber Found.Caused by Personnel Error. Transition Tube Modified to Correct Discrepancy & Snubber Replaced (← links)
- 05000368/LER-1988-012, :on 880430,setpoint Discrepancies Discovered During in Situ Testing of Pressurizer Code Safety Valves. Cause Re Differences in Stated Test Methods.Adjustments Made to Valves 2PSV-4633 & 2PSV-4634 (← links)
- 05000368/LER-1985-025, :on 851118,control Element Assembly Calculator Monthly Functional Test Not Performed.Caused by Personnel Error & Conflicting Monthly Test Schedules.Schedules Restructured & Personnel Counseled (← links)
- 05000368/LER-1988-004-01, :on 880211,observed Degraded Sys Flow Led to Discovery That Vol Damper in Sys Ductwork to Control Room Closed.Caused by Failure to Provide Locking Device to Prevent Wingnut from Loosening by Vibration (← links)
- 05000368/LER-1996-006-01, :on 970606,inadvertent Start of EDG Occurred. Caused by Inadequate Written Communication.Revised Job Order,Will Revise Appropriate Procedures Re EDG Operation & Will Train Sys Engineers on Lessons Learned from Event (← links)
- 05000368/LER-1997-007-01, :on 970626,fuel Handling Area Ventilation Flow Rate Less than TS Requirement During Crane Operation W/Load Over Storage Pool Due to Personnel Error.Provided Addl Guidance in Crane Hold Card Instructions (← links)
- 05000368/LER-1988-003-01, :on 880310,unplanned Automatic Actuation of ESFAS Occurred Due to Deenergizing of Electrical Distribution Sys Vital Power Panel for Maint.Caused by Drift of Time Delay Relay.Relay Recalibr (← links)
- 05000368/LER-1988-010, :on 880525,following Repair of Leak on Common Ref Leg of narrow-range Water Level Instrument,Safety Injection Tank D Inoperable.Caused by Low Water Level.Leak Repaired & Ref Leg Refilled (← links)
- 05000368/LER-1994-002-04, :on 940422,steam-driven Emergency Feedwater Pump Remained Inoperable Longer than Allowed by Ts.Caused by Inadequate Spec of Replacement Valve Characteristics.Valve Replaced w/pre-mod Model (← links)
- 05000368/LER-1996-006-04, :on 970606,inadvertent Start of EDG Occurred Which Resulted from Inadequate Written Guidance Re Sys Component Testing.Job Order Was Revised to Include Instructions to Vent Air Start Header (← links)
- 05000368/LER-1997-005-01, :on 970604,MSSV as-found Lift Values Did Not Meet TS Requirements Due to Combination of Maint,Testing & Design Factors.Mssv Were Replaced W/Valves That Had Been Fully Inspected & Tested at NWS (← links)
- 05000368/LER-1988-001, :on 850429,leakage Discovered in Two Solenoid Operated Valves While Performing Containment Test.Caused by Inadequate post-installation Verification Testing.Valves Removed & Reinstalled in Reverse Condition (← links)
- 05000368/LER-1988-002-01, :on 880219,continuous Fire Watch Personnel Found Asleep Which Is Violation of Tech Specs Requirement. Personnel Relieved of Fire Watch Duties & Employment Terminated (← links)
- 05000368/LER-1997-004-01, :on 970526,engineer Noticed That Sample Pump on Containment Bldg Super Particulate I Noble Gas Radiation Monitor Was Inoperable.Caused by Inadequate Alarming Capabilities.Software Change Implemented (← links)
- 05000368/LER-1986-003-01, :on 860312 & 13,fire Dampers 2FD-2123-33 & 2FD-2198-9 Failed to Close During Testing.Caused by Mechanical Interference.Dampers Reworked (← links)
- 05000368/LER-1997-003-01, :on 970514,personnel Discovered Deficiency in ANO-2 Ts,Providing Potential for Premature Actuation of Recirculation Signal During Loca.Caused by Deficiency in Ts. TS Amend Request Prepared (← links)
- 05000368/LER-1997-001-01, :on 970129,2R11 Failed to Identify Existing Tube Flaws for Further Evaluation as Required by SG Tube Surveillance Program.Caused by Personnel Error.Entergy Oversight of Testing Process Increased (← links)
- 05000368/LER-1985-021, :on 850925,unsealed Fire Barrier Penetration Reported During 18-month Fire Barrier Surveillance.Caused by Improper Sealing of False Wall for Cleanout Pipe from Restroom Into Turbine Bldg.Sealing Corrected (← links)
- 05000368/LER-1985-019, :on 850913,main Steam Isolation Sys Actuated on Low Steam Generator Pressure During Plant Cooldown.Caused by Personnel Error.Sys Restored to Preactuation Condition. Personnel Counseled (← links)
- 05000368/LER-1985-006, :on 850221,fire Watch Door Found Open.Caused by Failure to Label Door,Per New Fire Barrier & Penetration Marking Program Requirements.Door Labeled & Closed. Surveillance Verified Proper Labeling (← links)
- 05000368/LER-1985-027, :on 851217,monthly Surveillance Revealed That Armatures on Undervoltage Devices for Reactor Trip Circuit Breakers 4 & 8 in mid-position.Cause Not Stated.Procedures Changed to Require Verification of Position (← links)
- 05000368/LER-1985-017, :850813,while in Mode 1 at 100% Full Power, Reactor Trip Occurred.Caused by Closing Coil Being Connected to Break Before Make Instead of Make Before Break Auxiliary Switch.Closing Coil Replaced (← links)
- 05000368/LER-1985-016, :on 850805,trip Occurred Due to Erroneous RCS Parameter Inputs.Caused by Electrical Transient Induced by Lightning Strike.Coil Replaced to Correct Wiring Error & Emergency Feedwater Valve Returned to Svc (← links)
- 05000368/LER-1985-015, :on 850730,reactor Tripped.Caused by Erroneous Control Element Assembly Position Indication Due to Electronic Transient.Defective Component Replaced (← links)
- 05000368/LER-1985-014, :on 850718,reactor Trip Occurred.Caused by Inadvertent Actuation of Engineered Safeguards During Plant Protection Sys Surveillance Testing.Trip Matrix Test Pushbuttons Installed in All Four Channels (← links)
- 05000368/LER-1985-023, :on 851019,reactor Tripped Due to Loss of Condenser Vacuum.Caused by Displacement of Motor Shaft Key. Key Replaced & Set Screws Tightened,Staked & lock-wired in Position (← links)
- 05000368/LER-1997-002-01, :on 970204,function Providing Automatic Transfer of EFW Pump Suction Source to SW Inoperable.Caused by Inadequate Configuration Control of Instrument Isolation Valves.Valve Lineup Verification Performed (← links)
- 05000368/LER-1996-004-04, :on 961030,potential Failure of Functions of Plant Protective Sys Were Determined During Loss of Power. Cause Indeterminate.Established Administrative Controls to Prevent Channel from Being Bypassed (← links)
- 05000368/LER-1996-005, :on 961120,did Not Perform Surveillance Testing of Plant Protective Sys & post-accident Monitoring Instrumentation Due to Inadequate Procedures.Caused by Misinterpretation of TS (← links)
- 05000368/LER-1996-004-01, :on 961030,deficient Failure Modes & Effects Analysis for DC Electrical Sys Resulted in Unavailability of Automatic Functions of Plant Protective Sys.Established Administrative Controls (← links)
- 05000368/LER-1985-013, :on 850708,weekly Channel Check of in-core Detector Sys Found Not Performed on 850703.Caused by Administrative Oversight.Check Completed & Schedule Included in Util Tracking Sys (← links)
- 05000368/LER-1980-018-03, /03X-2:on 800407,emergency Feedwater Flow Became Erratic,Indicating Cavitation.Event Followed Loss of Power Caused by Tornado Damage.Caused by Effluent Flashing of Startup & Blowdown Demineralizers (← links)
- 05000368/LER-1996-005-04, :on 961120,surveillance Testing of Some Features of Plant Protective Sys & post-accident Monitoring Instrumentation Were Not Performed Due to Inadequate Procedures.Temp Elements Will Be Revised (← links)
- 05000368/LER-1985-012, :on 850617,core Operating Limits Supervisory Sys (COLSS) Declared Inoperable Due to Error in Calculation of DNBR Power Operating Limit.Caused by Input Error During Cycle 5 COLSS Update.Coding Error Corrected (← links)
- 05000368/LER-1985-018, :on 850816,reactor Trip Occurred in Mode 1 at 100% Power.Caused by Field Effect Transistors Failing in High Level Multiplexer Cards for Control Element Assembly Calculator 2 Analog Input.Cards Replaced (← links)
- 05000368/LER-1985-010, :on 821107,range for Startup Channel Indication 2JI-9000 Located on Remote Shutdown Panel Discovered Not to Have Met Range Required by Tech Spec 3.3.3.5 During Cycle 3. Design Modified During Third Refueling Outage (← links)
- 05000368/LER-1985-009, :on 850409,during Design Mod,Various Engineered Safeguards Actuations & Containment Isolation Occurred. Caused by Error in Design Mod Installation Instructions. Instructions Modified & Mods Completed (← links)
- 05000368/LER-1992-007, :on 920923,discovered That Flow Rates Through HPSI Legs Unbalanced & Below Min TS Value.Caused by Vendor (Target Rock) Error.Eight Stock Disc Plus Reworked & Refurbished Discs Installed in HPSI Valves (← links)
- 05000368/LER-1992-010-02, :on 921125,identified That 2 of 8291 Tubes in B SG Had Not Been Inspected During Refueling Outage 2R9, Due to Human Error.Qa Will Perform Surveillance of Eddy Current Data Mgt Sys During Outage (← links)
- 05000368/LER-1979-096-03, /03L-0:on 791211,during Mode 1 Operation,Core Protection Calculator C Failed,Causing Low DNBR & High Linear Power Density Trips.Caused by Data Link Failure Between Calculator & Operator Console.Sys Restarted (← links)
- 05000368/LER-1979-095-03, /03L-0:on 791211,during Mode 1 Operation,Battery Charger 2D32 Discovered to Have Low Output Voltage,Rendering Bus Inoperable.Caused by Current Surge While Readjusting Output Voltage.Ac Breaker Reset & 2D32 Returned to Svc (← links)
- 05000368/LER-1979-094-03, /03L-0:on 791207,during Mode 1 Operation,Channel B Pressurizer Pressure Variable Setpoint Oscillated Between 0 & 1,000 Psia,Causing Low Pressurizer Pressure Trip on Channel B.Caused by Power Supply Failure.Card Replaced (← links)
- 05000368/LER-1979-058-03, /03L-0 on 790724:as Result of Investigation Per IE Bulletin 79-02,seven Restraints Identified as Having Safety Factor Greater than Two.Method of Obtaining Bolt Loads Revised (← links)
- 05000368/LER-1992-006-03, :on 920909,relay Actuation Caused One EDG to Start Due to Deficiency in Special Work Plan for ESFs Relay Replacement.Event Reviewed W/Personnel Responsible for Relay Replacement & Work Plan Changed (← links)
- 05000368/LER-1996-002-04, :on 960409,RAS Surveillance Test Not Performed. Caused by Inadequate Testing Procedures.Revise Procedures Prior to Next Scheduled Surveillance Test.Mgt Expectations Re TS Compliance Reinforced W/Ano Personnel (← links)
- 05000368/LER-1992-009-02, :on 921021,discovered That Leak Test Surveillance of Excore Nuclear Instrumentation Detectors Not Performed,Per TS Due to Procedural Inadequacies. Administrative Procedures Revised (← links)
- 05000368/LER-1985-008, :on 850318,degraded Penetration Fire Barrier Blockout Discovered.Condition Existed Since Initial Grout Sealing.Fire Watch Established Per Requirements of Tech Spec 3.7.11 & Void Subsequently Filled (← links)
- 05000368/LER-1996-003-04, :on 960715,personnel Discovered 18-Month Channel Calibr Test Had Not Been Performed as Required by Ts.Caused by Inadequate Change Mgt.Enhancements to Procedure Change Administration Process Implemented (← links)
- 05000368/LER-1992-004, :on 920412,discovered That a Emergency DG Engine Became Incapable of Supplying Full Load.Caused by Inadequate Cleanliness.Foot Valve in Fuel Oil Day Tank 2T-30A Removed & Cleaned (← links)
- 05000368/LER-1992-008-02, :on 921003,discovered That Tritium Grab Sample of Unit 2 Reactor Bldg Ventilation Exhaust Had Not Been Obtained,As Required by Tech Specs.Caused by Personnel Error.Personnel Counseled Re Responsibilities (← links)
- 05000368/LER-1992-007-02, :on 920923,discovered That Flow Rates Through HPSI Legs Unbalanced & Below Min Value Specified in Ts. Caused by Incorrect Size of Target Rock Valve Discs.Disc Plugs Reworked.Not Reportable Per Part 21 (← links)
- 05000368/LER-1985-003, :on 850201,Tech Specs 4.6.1.3.c Surveillance Requirement Not Met.Caused by Inadequate Guidance & Review of Tech Specs During Procedure Writing & Rev Process.Test Procedure Revised (← links)
- 05000368/LER-1985-004, :on 850204,loss of Main Generator Field Excitation Caused Turbine Generator Trip Resulting in High RCS Pressure Reactor Trip.Caused by Exciter Brush Too Short. Slip Rings Machined & Brushes Replaced (← links)
- 05000368/LER-1985-005-02, :on 850207,automatic Reactor Trip Occurred. Caused by Axial Shape Index Out of Range.Procedure Modified to Require Startup Control Element Assembly Positions Be Established Prior to 5% Full Power (← links)
- 05000368/LER-1981-014-03, /03X-1:on 810328,operator Insp Found Excessive Packing Leakage from Emergency Feedwater Pump & Water in Bearing Lubricating Oil.Caused by Excessive Shaft Packing Leakages During Pump Idle Time (← links)
- 05000368/LER-1981-013-03, /03X-1:on 810304,RCS Cold Leg Temp Indicator Discovered to Be Reading High.Caused by Defective Servo Motor.Motor Replaced.Indicator Calibr (← links)
- 05000368/LER-1979-047-04, /04X-1:on 790627,condenser Vacuum Pump Radiation Monitors 2RE0645 & 2RE0646 Inoperable for More than Seven Days.Caused by Moisture Buildup Due to Condensation.Heat Tracing Installed to Minimize Buildup (← links)
- 05000368/LER-1982-006-03, /03X-2:on 820212,17,0319 & 29,containment Isolation Valve 2CV-2061-2 for Reactor Bldg Sump Drain Failed to Close.Caused by Failing Actuator.Actuator Reassembled & Air Supply Line Relocated (← links)
- 05000368/LER-1996-001-05, :on 960330,flow Rate for Auxiliary Building Ventilation Gaseous Effluent Monitoring Instrumentation Not Estimated.Caused by Inadequate Training.C/A:Lesson Learned & Training Provided (← links)
- 05000368/LER-1985-001, :on 850102,during Monthly Surveillance Testing of Plant Protection Sys Channel A,Inadvertent Actuation of Recirculation Actuation Sys Occurred.Caused by Spurious Matrix Logic Signal (← links)
- 05000368/LER-1992-005-01, :on 920824,discovered That Fuel Handling Area Ventilation Exhaust Fan Belt Had Been Operated for Two Periods W/O Effluent Monitored for Radioactivity Required by Ts.Caused by Personnel error.SPING-7 Repaired (← links)
- 05000368/LER-1981-033-04, /04X-1:on 810909,during Mode 1 Operation,Condenser Offgas Radiation Monitor Identified as Having Been Inoperable for 7 Days.Caused by Erratic Radiation Element Signal Due to Moisture build-up in Piping (← links)
- 05000368/LER-1984-029, :on 841129,fire Door self-closing Mechanism Found Out of Adjustment.Caused by High Usage,Oil Cylinders & Worn seals.Self-closing Mechanism Replaced (← links)
- 05000368/LER-1984-028, :on 841103,reactor Tripped.Caused by Low Water Level in Steam Generator a During Turbine Stop Valve Testing Due to Possible Malfunction of mercury-wetted Relay.Initial Operation Restored Mercury to Reservoir (← links)
- 05000368/LER-1992-003-02, :on 920501,initiated Manual Reactor Trip After Mismatch in Charging & Letdown Flowrates Observed.Cause Unknown.Cause for Recurring High Dp Identified by 920901. Procedure 2203.012L Revised (← links)
- 05000368/LER-1992-001-01, :on 920227,discovered That Previous Surveillance Testing of ex-core Instrumentation Logarithmic Power Level High Trips Not Performed.Caused by Inadequate Procedures.Procedures Revised (← links)
- 05000368/LER-1984-027, :on 841031,automatic Reactor Trip Occurred. Caused by out-of-range Axial Shape Index.Plant Startup Procedures Modified to Include Guidance for Axial Shape Index Control Considering Core Life (← links)
- 05000368/LER-1984-026, :on 841026,automatic Reactor Trip Occurred as Result of Dropped Control Element Assembly.Caused by Shorted Upper Gripper Coil for Control Element Assembly 7. Coil Replaced (← links)
- 05000368/LER-1992-002, :on 920309,primary-to-secondary Leak in SG a Detected.Caused by Cognitive Personnel Error & Lack of Training in Eddy Current Analysis.Training & Testing of Analysts Completed & Tube 67-109 Plugged (← links)
- 05000368/LER-1980-045-04, /04X-3:on 800702,0823 & 1102,condenser off-gas Radiation Monitor 2RE-0645 Found Inoperable.Caused by Erratic Radiation Element Signal.Plastic Coated Detector Installed & Moisture Resistant Epoxy Used (← links)
- 05000368/LER-1979-066-03, /03X-1:on 790809,following Draining of Reactor Drain Tank,Outside Containment Isolation Valve 2CV-2201-2 Would Not Close.Caused by Foreign Matl Damaging Seats & Balls.Valve Disassembled,Cleaned & Reassembled (← links)
- 05000368/LER-1980-087-03, /03X-2:on 801129,high Pressure Safety Injection Valve 2CV-5056 Failed to Close While Performing Routine Level Adjustments of Safety Injection Tank 2T-2C.Caused by Blown Control Power Fuse.Fuse Replaced (← links)
- 05000368/LER-1995-002-04, :on 950901,Unit 2 Experienced Automatic RT on B SG High Level as Resust of Human Error Involving Use of Improper Work Surface by Contract Painter.Caused by Human Error.Mgt Suspended All Plant Painting (← links)
- 05000368/LER-1995-003-04, :on 950902,automatic RT on High Axial Shape Index During Startup Due to Inadequate Monitoring & Action to Maintain Excore Power Below Core Protection Calculator Trip Enable Setpoint.Revised Procedure (← links)
- 05000368/LER-1984-025, :on 840727,discovered That Incorrect Data Used to Calibr Resistance Temp Detector (RTD) 2TE-4711-4 Which Provides Cold Leg Temp Input to Channel D Core Protection Calculator.Caused by Manufacturer Error (← links)
- 05000368/LER-1984-020, :on 840726,automatic Reactor Trip Occurred Due to High Level in Steam Generator B.Caused by Swell in Steam Generator Levels When MSIVs Opened During Startup (← links)
- 05000368/LER-1979-086-03, /03X-3:on 791013,shutdown Cooling HX 2E35B Radiational Monitor Indication Increased.Caused by Leak in Tube 74Q.Tube Replaced (← links)
- 05000368/LER-1984-021, :on 840728,automatic Reactor Trip Occurred Due to High Level on Steam Generator B.Main Feedwater Flow Increased in Response to Decreasing Steam Generator Level.No post-trip Anomalies Noted (← links)
- 05000368/LER-1984-017, :on 840713,fire Barrier Penetration 2124-0004 Identified as Degraded During HVAC Mods.Fire Watch Established within 1 H of Discovery.Penetration Repaired by Replacing Plastic Tubing W/Copper Tubing (← links)
- 05000368/LER-1992-004-01, :on 920412,foreign Matl Discovered in EDG Fuel Oil Tank.Caused by Inadequate Cleanliness & Foreign Matl Exclusion Controls.Foot Valve in Fuel Oil Day Tank Removed & Cleaned & Fuel Oil Filters Replaced (← links)
- 05000368/LER-1984-019, :840720,manual Reactor Trip Initiated from 100% Full Power Following Spurious half-leg Trip.Caused by Operator Inadvertently Pressing Alternate Source to Load Button Instead of Reset Button (← links)
- 05000368/LER-1995-007-03, :on 951122,manual Valves Not Having Been Secured in Closed Position Identified.Caused by Error in Procedure Change Mgt Process.Lessons Learned Training Provided & Procedures Revised (← links)
- 05000368/LER-1995-006-03, :on 951018,discovered That Rwa Gaseous Effluent Flowpath Not Continuously Monitored as Required by TS Due to Separated Sample Line Connection.Procedures for Using Sampling Equipment Revised (← links)
- 05000368/LER-1995-005-03, :on 951004,MSSV Setpoints Not within TS Tolerance During Operation Due to Failure to Adequately Specify Environ Conditions for Use in Vendor Procedures for Testing Setpoint Adjustment.Adjusted Setpoints (← links)
- 05000368/LER-1984-013, :on 840617,reactor Tripped from Full Power on Low DNBR Due to Penalty Factors Generated by Core Protection Calculators.Caused by Dropped Control Element Assembly (← links)
- 05000368/LER-1984-016, :on 840621,penetration Fire Barrier Damper Mfg by American Warming & Ventilating,Inc,Failed to Completely Close Upon Fusible Link Removal.Caused by Metal Shaving on Pivot Section of Damper Blades (← links)
- 05000368/LER-1980-026-03, Control Room Emergency Air Conditioner Compressor Trip Occured on Freeze Protection.Caused by Insufficient Load When Providing Cooling from Core Protection Calculator Room (← links)
- 05000368/LER-1990-024-01, :on 901113,turbine Tripped on Overspeed,Causing Blown Steam Traps.On 901129 & 1206,overspeed of Emergency Feedwater Pump 2P7A Occurred.Caused by Sluggish Governor Response.Oil & Filter Replaced (← links)
- 05000368/LER-1995-004-04, :on 950926,CR Emergency Ventilation Sys Actuation Occurred Due to Failure to Consider Potential Effects of Performing Evolution Known to Produce Elevated Airborne Levels.Revised Procedures (← links)
- 05000368/LER-1984-014, :on 840618,reactor Turbine Trip Occurred at Approx 8% Full Power Due to High Level in Steam Generator A.Caused by Main Feedwater Bypass Regulating Valve E/P Converter Malfunction (← links)
- 05000368/LER-1984-023, :on 840829,while RCS Being Vented Via Upper Vessel Head Vent,Nitrogen Flow Exceeded Vent Flow Capacity, Causing RCS to Slightly Pressurize Resulting in Inaccurate Level Indication (← links)
- 05000368/LER-1981-038-03, 11 & 12,emergency Feedwater Pump 2P7A Tripped on Overspeed.Caused by Oil Leak in Turbine Hydraulic Sys.Oil Leak Repaired & Emergency Feedwater Pump Returned to Svc (← links)
- 05000368/LER-1984-024, :on 840828,reactor Trip Occurred.Caused by Dropped Control Element Assembly (Cea).Silicon Controlled Rectifiers Replaced for Cea.Power Supply fuses,opto-isolator Cards & Coil Driver Cards Replaced (← links)
- 05000368/LER-1984-012, :on 780905,unit Entered Mode 4 W/Apparent Error in Vendor Electrical Drawing for RCS Sampling Cabinet 2C116. Caused by Design Const Error.Jumpers Removed on 840518, Restoring Fuse Protection (← links)
- 05000368/LER-1984-011, :on 840507,reactor Turbine Trip Occurred Due to High Level on Steam Generator B.Caused by Master Controller Settings Not Being Set at Optimum Setpoints for Maneuvering at Reduced Power Levels (← links)
- 05000368/LER-1991-018-01, :on 911230,service Water Loop Inoperable Resulting in Entry Into TS 3.0.3.Cause Has Not Been Determined.Valve Replaced in Shut Position Under Operations Administrative Controls (← links)
- 05000368/LER-1979-025-01, 11 Fire Dampers Identified as Not Seismically Qualified,Per GDC 3.Caused by Faulty Installation Qa.Eight Dampers Replaced & Three Upgraded to Required Seismic Qualifications (← links)
- 05000368/LER-1990-024, :on 901113,turbine Tripped on Overspeed.On 901129,overspeed Trip of Emergency Feedwater Pump Occurred. on 901205,determined That Trips Caused by Water Slugging of Turbine.Oil Flush of Turbine Oil Sys Will Be Performed (← links)
- 05000368/LER-1991-016-01, :on 910924,improperly Sealed Fire Barrier Penetration Between Floor of South EDG Room & Overhead of Corridor Outside Sample Room Discovered.Caused by Inadequate Administrative Controls.Fire Watch Posted (← links)
- 05000368/LER-1991-012, :on 910416,both Svc Water Loops Declared Inoperable,Due to Clogging of Pump Discharge Strainers. Caused by Breakdown in Implementation of Procedural Control. Strainers Unclogged & Training Performed (← links)
- 05000368/LER-1983-036-04, Wind Direction Indication at 40 Ft elevation,180 Degree off-course.Caused by Mounting of Transmitter 180 Degree from Correct Position.Transmitter Mounted Correctly & Aligned (← links)
- 05000368/LER-1982-047-03, Following Emergency Feedwater Actuation,Discharge Control Valve from Pump 2P-7B to Steam Generator B Failed to Respond.Caused by Loose Leads in Motor & Low Hydraulic Pressure (← links)
- 05000368/LER-1980-083-03, /03X-1:on 801103,Sigma Startup Channel Indicator 2JI-9000 & Steam Generator B Level Indicator 2LI-1133 Found Inoperable.Indicator 2JI-9000 Stuck & 2LI-1133 Had Bad Servo Motor.Both Indicators Replaced (← links)
- 05000368/LER-1980-088-03, Core Protection Calculator a & Control Element Assembly Calculator 1 Failed. Caused by Voltage Transient on 2Y11 & 2Y13.Sigma Indicator 2FI-8229-1 Replaced W/More Reliable Model (← links)
- 05000368/LER-1984-006, :on 840221,operations Personnel Recognized That Addressable Constant Updated for Core Protection Calculator Channel C Still in Progress When Channel D Prepared for Monthly Surveillance Testing.Procedure Changed (← links)
- 05000368/LER-1983-050-99, /99X-0:on 831109,diesel Generator 2 Exhibited Erratic Performance.Caused by Bad Contacts on Droop Relay in Conjunction W/Less than Optimum Tuning of Governor Controls.Droop Relay Replaced (← links)
- 05000368/LER-1995-001-03, :on 950719,human Error in Design of Plant Mod Created Potential for Failure of One DC Electrical Bus to Have Caused Failure of Opposite Train of Efw.Conducted Evaluation of Potential Generic Implications of Condition (← links)
- 05000368/LER-1984-005, :on 840210,output of Channel a ex-core Detector Subchannels Appeared to Saturate at 50.7% Power.Preamp Assembly & Filter Replaced.Testing Confirmed Proper Functioning of Subchannels (← links)
- 05000368/LER-1984-002, :on 840129,during Routine Surveillances of Core Protection Calculator Sys,Operations Personnel Observed That Valves of Addressable Constants Did Not Agree W/Valves for Cycle 4.Caused by Reactor Trip on 840128 (← links)
- 05000368/LER-1984-004, :on 840131,reactor Tripped from Approx 10% Full Power.Caused by Low Steam Generator Level in Steam Generator B Due to Manual Level Control Difficulties (← links)
- 05000368/LER-1984-003, :on 840130,unit Tripped on Low Steam Generator Pressure W/Concurrent Main Steam Isolation Sys Actuation. Caused by Leaking Boric Acid Addition Flow Control Valve 2CV-4926.Valve Repaired (← links)
- 05000368/LER-1984-001, :on 840128,unit Tripped During Low Power Physics Testing.Caused by One Pin Peaking Factor Limit Being Exceeded Due to Control Element Assembly Position During Testing.Procedures Modified (← links)
- 05000368/LER-1991-017-01, :on 911011,discovered That TS Surveillance Test for Station Batteries Not Performed within Max Allowable Time Limit.Caused by Lack of Oversight of Surveillance Activity.Tests Highlighted on Shop Schedule (← links)
- 05000368/LER-1983-043-03, /03L-0:on 830907,contract Person Posted for Fire Watch Duty Discovered Asleep.Individual Awakened & Relieved.Disciplinary Actions Taken.Fire Watch Policy Expanded (← links)
- 05000368/LER-1991-015-01, :on 910912,Coltec Industries Advised Util That Vendor Analysis of Coolant Cross Flow Identified Potential That EDGs Unable to Provide Electrical Output.Valve Closed to Isolate Flow Path.Also Reported Per Part 21 (← links)
- 05000368/LER-1984-007, :on 840310,unit Tripped from Approx .01% Full Power During Controlled Shutdown.Core Protection Calculators Generated Low DNBR Trip When Out of Range Value of Local Heat Flux,Resulting in Min DNBR Value of Zero (← links)
- 05000368/LER-1984-009, :on 840319,response Time of Resistance Temp Detector on Channels a & D Beyond Tech Spec Limits.Caused by Inadequate Thermal Coupling.No Corrective Actions Taken (← links)
- 05000368/LER-1984-008, :on 840312,reactor Tripped Due to Low Steam Generator Level in Steam Generator A.Caused by Normal Level Control Difficulties at Low Steam Demand Conditions. Corrective Actions Under Consideration (← links)
- 05000368/LER-1978-026-03, /03L-0 on 781216:during Normal Testing 2CV-1039-2 Failed to Operate from Control Room,Rendering Emergency Feedwater Pump 2P7A Inoperable.Failure Located in Solid State Relay Actuating 2CV-1039-2 (← links)
- 05000368/LER-1978-025-03, /03L-0 on 781214:during Low Power Physics Testing, Ceac 1 Rendered Inoperable.Caused by Accidental Shorting of Leads to Common During Calibr of digitial-to-analog Converters in Core Protection Computer Channel B (← links)
- 05000368/LER-1978-024-03, /03L-0 on 781214:barrel Test on Emergency Escape Hatch 2C4 & Personnel Hatch 2C2 Not Performed as Scheduled. Caused by Scheduling Error Due to Responsibility Change of Supervisors.Test Completed on 781215 (← links)
- 05000368/LER-1983-049-01, /01T-0:on 831212,due to Procedural & Personnel Errors Identified in Station Battery Surveillance Requirements,Review of Addl Surveillances Conducted.Addl Past Inadequacies Discovered (← links)
- 05000368/LER-1982-003-03, Svc Water Flow Through Low Pressure Safety Injection Pump B Seal Cooler 2E-52B Found Low.Caused by Asiatic Clam Shells Lodged in Supply Tubing Cooler.Supply Tube Cleaned (← links)
- 05000368/LER-1983-048-03, /03L-0:on 831114,no Response Observed on Startup Channel 1 of Nuclear Instrumentation When Fuel Assembly, Containing Neutron Source,Inserted Into Core.Caused by Problems in Mother Board.Board Replaced (← links)
- 05000368/LER-1983-046-03, /03L-0:on 830709,gross Activity Surveillance of Secondary Coolant Performed Outside Tech Spec Time Period Requirement.Caused by Personnel Error.Personnel Training Conducted (← links)
- 05000368/LER-1983-047-03, /03L-0:on 831023,channel Functional Test of Source Range Neutron Flux Monitors Not Performed within Required Surveillance Requirements.Procedure Changed (← links)
- 05000368/LER-1991-014, :on 910613,four Circuit Breakers in 4160 Volt ESF Switchgear Discovered to Be Routinely Positioned in racked-down Configuration.Caused by Inadequate Licensing Basis Documents.Breakers Moved (← links)
- 05000368/LER-1983-042-03, /03L-0:on 830913 & 15,junction Box for Conduits in Fire Zone 2150 Discovered Open & Gap Between Floor & Fire Doors 340 & 267 Exceeded Acceptance Criteria.Caused by Exclusion of Zones from Installation Specs (← links)
- 05000368/LER-1982-007-03, Leak Discovered in Weld for Drain Line of Suction Bladder of Charging Pump 2P-36C. Caused by vibration-induced Cracking.Check of Pulse Inflation Added to Preventative Maint Cycle (← links)
- 05000368/LER-1983-004-01, /01T-0:on 831212,personnel Determined That During Oct 1982 18-month Test,Not All Containment Penetration Conductor Overcurrent Protection Devices Tested Per Tech Spec 4.8.2.5.a.2 (← links)
- 05000368/LER-1983-038-03, /03L-0:on 830818,core Protection Calculator Channel a Placed in Bypasss & Channel D Tripped.Caused by Point Identification Number 064 for Channels Reading Less than Min (← links)
- 05000368/LER-1983-040-03, /03L-0:on 830831,control Element Assembly 47 Dropped to Lower Electrical Limit.Caused by Blown Fuse. Opened Fuse Replaced,Current Traces Taken & Tightness of Connections Checked (← links)
- 05000368/LER-1983-039-03, /03L-0:on 830825,leak Found in Weld of Pressure Sensing Line for Middle Seal of Reactor Coolant Pump.Caused by Weld Crack Due to Vibration.Line W/Cracked Weld Replaced. Mod Planned (← links)
- 05000368/LER-1983-037-03, /03L-0:on 830816,during Mode 1 Operation, Degradations in Fire Doors 257 & 270 Observed.Caused by Relocation of Signs & Security Equipment Installation & Mods.Degradations Repaired (← links)
- 05000368/LER-1983-006-03, /03L-0:on 830202,while in Mode 1 at 33% Power, Control Room a Emergency Chiller 2VE-1A Tripped on High Condenser Pressure During Preventive Maint.Caused by Defective Power Supply.Power Supply Replaced (← links)
- 05000368/LER-1983-002-03, /03L-0:on 830106,control Room Indication Lost for Intake Structure Exhaust Fan 2VEF-25B.Caused by Opened Fuse Due to Grounded Motor Power Cable.Cable Replaced & Exhaust Fan Returned to Svc (← links)
- 05000368/LER-1991-013-01, :on 910512,fire Watches Released from Inoperable Fire Barriers Prematurely.Caused by Inadequate Documentation Re Posting Requirements.Approval by Fire Protection Required Prior to Release in Future (← links)
- 05000368/LER-1994-005-03, :on 941121,ANO I&C Technician Inadvertently Reset Variable Setpoint for a Channel of Low SG Pressure Trip,Causing Setpoints Below Min Allowed by Ts.Caused by Personnel Error.Crew Briefed on self-checking (← links)
- 05000368/LER-1994-001-01, :on 940312,TS Requirements for Logarithmic Power Level Instrumentation Operability Not Met Due to Inadequate post-maint test.Post-maint Test for Other Channels Tested During Outage in Progress Revised (← links)
- 05000368/LER-1994-004-03, :on 941007,surveillance Testing of One HP SI Pump Did Not Verify Operability as Required by TS Due to Procedure Deficiencies.Individuals from Several Sites Reviewed All 4160V SR Schemes (← links)
- 05000368/LER-1983-030-03, /03X-1:on 830704 & 0804,remote Shutdown Panel Instrument 2JI-9000 Deviated from Control Room 2JIS-9000-1. Caused by Out of Calibr Voltage Buffer & Intermittent Indicator Output Shift,Respectively (← links)
- 05000368/LER-1983-031-03, /03L-0:on 830713,control Room Emergency Air Conditioner 2VE-1B Observed Tripping Due to Low Freon. Caused by Leak in Liquid Line Serving Core Protection Calculator Room Air Conditioner.Leak Repaired (← links)
- 05000368/LER-1983-026-03, /03L-0:on 830620,deficient Fire Barrier Penetration Seals Discovered Between Walls Providing Access to Electrical Equipment & Cable Spreading Rooms.Cause Not Stated.Fire Watch Posted.Seals Repaired (← links)
- 05000368/LER-1983-029-03, /03L-0:on 830703,control Element Assembly Calculator 1 Sensor Failure Lights Came on for Assemblies 64 & 72.Caused by Failure of High Level Max Card in Calculator. Card Replaced & Calculator Returned to Svc (← links)
- 05000368/LER-1991-010, :on 910407,containment Purge Isolation Valve Declared Inoperable Due Excessive Leakage.Caused by Inadequate Design Info from Valve Mfg.Valve Will Be Replaced or Rotated,Per Evaluation of Feasibility (← links)
- 05000368/LER-1983-021-03, /03L-0:on 830512,unsealed Conduit Breaching West Wall of Fire Zone 2024JJ Identified.On 830518,addl Inadequately Sealed Penetration Identified.Caused by Inadequate Design.Design Change Package Issued (← links)
- 05000368/LER-1983-022-03, /03L-0:on 830514,core Protection Calculator Channels Placed in Ceac 1 Inop or Ceac 2 Inop for Spurious Alarm Troubleshooting.Spurious Alarms Caused by Faulty Cards on Annunciator 2K-05 (D-4) & ZK-05 (F-4) (← links)
- 05000368/LER-1983-020-01, /01T-0:on 830519,discovered Fire Watch Improperly Posted.Caused by Ineffective Communication Among Plant Personnel.Guidance Being Written for Personnel Re Fire Watch Responsibilities (← links)
- 05000368/LER-1983-023-03, /03L-0:on 830518,during Routine Monitoring of Plant Parameters,Upper Seal Cavity Pressure on Reactor Coolant Pump 2P-32B Read Low & Bleedoff Temp Read High. Caused by Leak Due to Weld Crack (← links)
- 05000368/LER-1983-032-03, /03L-0:on 830714,while in Mode 1,unsealed Electrical Cable Conduit Identified Through Floor of Cable Spreading Room.Cause Unknown.Fire Watch Posted & Penetration Properly Sealed.Surveillance Procedure Revised (← links)
- 05000368/LER-1991-011, :on 910415,subcritical Reactor Trip Occurred During Testing of Reactor Protective Sys.Caused by Procedural Deficiency.Administrative Process for Procedure Preparation Reviewed (← links)
- 05000368/LER-1983-016-03, /03L-0:on 830311,containment Spray Pump 2P-35A Tripped Due to Tripped C Phase Instantaneous Overcurrent Relay.Caused by Deviation from Setpoint.Relay Reset.Periodic Checks Will Monitor Further Setpoint Drift (← links)
- 05000368/LER-1983-017-03, /03L-0:on 830312,sodium Hydroxide Addition Pump 2P-136A Failed to Start Upon Containment Spray Actuation Sys Actuation.Caused by Improper Limit Switch Setup.Maint Procedures Revised (← links)
- 05000368/LER-1994-003-03, :on 940824,discovered That Surveillance Testing of CEA Position Indication Not Performed as Required by TS Due to Personnel Error Associated W/Computer Software Change.Pms Software Revised (← links)
- 05000368/LER-1983-015-03, /03L-0:on 830308,containment Spray Actuation Sys (CSAS) Inadvertently Actuated.Caused by Defective K1523 Relay Controlling Trip Path 2 or 4 in Csas.Relay Replaced (← links)
- 05000368/LER-1983-019-03, /03L-0:on 830314,watchdog Timer Timed Out & Central Processing Unit Halted.Cause Not Determined.Unit Reinitialized (← links)
- 05000368/LER-1983-012-03, /03L-0:on 830222,steam Driven Emergency Feedwater Pump 2P-7A Would Not Attain Rated Speed or Discharge Pressure During Surveillance Test.Caused by Setpoint Drift in Speed Controller.Converter Gain Adjusted (← links)
- 05000368/LER-1983-025-01, /01T-0:on 830615,determination Made That Since 830517,one Rdt in RCS Degraded to Point That Effective Rdt Time Constant of Core Protection Calculator,Channel D Not Adequately Compensated Per Tech Specs (← links)
- 05000368/LER-1983-024-03, /03L-0:on 830527,erratic RCS Pressure Control Led to Discovery of Three Opened Fuses in Proportional Heater Cabinets,Resulting in Partial Loss of Proportional Heaters. Caused by Power Surge Due to Lightning Strike (← links)
- 05000368/LER-1982-041-03, /03L-0:on 821124,isolation Valve 2MS-0340 Failed to Close & Steam Leak Discovered in Emergency Feedwater Pump Steam Supply Pressure Transmitter 2PT-0340.Caused by Stripped Threads Due to Overtorquing of Tubing Connector (← links)
- 05000368/LER-1991-009, :on 910311,containment Ventilation Sys Effluent Pathway Not Being Monitored for Particulate & Iodine Activity Due to Personnel Error.Disciplinary Action Taken Against Responsible Individual (← links)
- 05000368/LER-1983-003-03, /03L-0:on 830109,alarm Received on Svc Water Monitor 2RITS-1453 for Shutdown Cooling Hx,Indicating Tube Leak.Cause Undetermined.Tubes Plugged (← links)
- 05000368/LER-1983-004-03, /03L-0:on 830114,while in Mode 5,fire Barrier Penetration Found Unsealed.Probably Caused by Personnel Error.Fire Watch Posted.Penetration Sealed & Inspected (← links)
- 05000368/LER-1991-008, :on 910309,control Room Automatically Shut Causing Actuation of Smoke Detector in Supply Air Duct. Caused by Design & Location of Diesel Generator.Relocate Diesel Generator of Outside Air Intake (← links)
- 05000368/LER-1991-007, :on 910223,fire Occurred in 480-volt ESF Motor Control Ctr Following Start of Turing Gear Motor.Caused by Incomplete Contact Between Bus Bars & Circuit Breaker Power Stabs.Design Change Under Evaluation (← links)
- 05000368/LER-1982-052-01, /01T-0:on 821230,following Incident at San Onofre Unit 3,insp of Plant Protection Sys Revealed Identical Connector Design.Design Change Developed to Prevent Sys Actuation (← links)
- 05000368/LER-1982-045-03, /03L-0:on 821129,slow Decrease in Pressurizer Pressure Noted W/Both Proportional & One Backup Heater Banks Energized.Caused by Three Open Fuses.Fuses Replaced (← links)
- 05000368/LER-1982-044-03, /03L-0:on 821206,control Power Fuse Opened on Charging Pump 2P-036-C During Pump Startup While Charging Pump a Inoperable Due to Maint.Possibly Caused by Fuse Fatigue or Dragging Contactor.Fuse/Motor Contacts Replaced (← links)
- 05000368/LER-1982-037-03, /03L-0:on 821110,during Low Power Testing in Mode 2,breaker to Operating Charging Pump 2P36A Tripped. Caused Unknown.Resistance Checks of All Motor Leads & Windings Revealed No Abnormalities (← links)
- 05000368/LER-1991-005, :on 910201,automatic Reactor Trip Initiated by Core Protection Calculators.Caused by Faulty Racking Motor. Racking Motor Removed from Svc & Inspected,Design Engineering Reviewed & Enhanced Sys Design (← links)
- 05000368/LER-1982-034-03, /03L-0:on 821107,improper Level Indication Observed on C Safety Injection Tank.Caused by Water in Safety Injection Tank Saturated W/Nitrogen,Causing Gas Bubbles to Develop in Transmitter Ref Legs.Legs Vented (← links)
- 05000368/LER-1983-011-03, /03L-0:on 830218,during Mode 3 & Feeding of Steam Generators W/Emergency Feedwater Pump 2P-7B,control Valve 2CV-1036 Failed to Close.Caused by Shorted Relay Coil Ite Imperial 220-EB220PA-5.Relay Replaced W/Gould Relay (← links)
- 05000368/LER-1991-002, :on 910118,control Power Transformers in Motor Control Ctr Breakers for EDG Room Exhaust Fans Found Undersized.Caused by Design Deficiency.Breakers Replaced W/ Larger Units & Design Drawing Revised (← links)
- 05000368/LER-1991-003, :on 910118,reduced Power Requirements of Tech Specs Not Adhered to During Recovery from Dropped Control Element Assembly.Caused by Inadequate Procedural Guidance. Procedure Change Implemented (← links)
- 05000368/LER-1991-001-02, :on 910114,two Through Wall Voids Found.Caused by Breakdown in Communication Between Electrical Maint & Fire Protection Personnel.Rev to Insp Procedures & Improved Training for Insp Personnel Implemented (← links)
- 05000368/LER-1982-032-03, /03L-0:on 820930,pressurizer Relief Valve 2PSV- 4634 Found to Be Set Above Tech Spec Limit.Caused by Lack of Movement Over Long Period of Plant Operation.Valve Tested & Spring Compression Adjusted (← links)
- 05000368/LER-1990-022, :on 900926,discovered That Coil Unit Mounting Brackets Improperly Installed on Fan Side of Svc Water Sys Coolers.Caused by Inadequate Work Instructions During Coil Replacement.Units Drained (← links)
- 05000368/LER-1990-023-01, :on 901105,discovered Degraded Fire Barrier While Performing Penetration Seal Insp (← links)
- 05000368/LER-1982-030-01, /01T-0:on 820922,measurements Revealed Shoulder Gap Clearances on Certain Batch C Fuel Assemblies May Not Be Sufficient to Prevent Pin Contact.Caused by Design Models & Annealed Guide Tubes Growing at Lesser Rate (← links)
- 05000368/LER-1990-022-01, :on 900926,switchgear Room Cooling Units Not Seismically Qualified Due to Improper Bolting of Cooling Coil Mounting Brackets (← links)
- 05000368/LER-1990-016, :on 900716,unacceptable Work Practice Resulted in Starting of Emergency DGs During Performance of Special Work Plan.Caused by Personnel Error.Meeting Conducted to Address Subj Problem (← links)
- 05000368/LER-1994-001-04, :on 940312,TS Requirements for Logarithmic Power Level Instrumentation Operability Not Met Due to Inadequate post-maint test.Post-maint Test Methods Enhanced (← links)
- 05000368/LER-1982-028-03, /03L-0:on 820820,RCS Leakage Calculations Indicated Unidentified Leakage Greater than Tech Spec Limit of 1 Gpm.Cause Undetermined.Manway Will Be Examined During Refueling Outage to Determine Cause (← links)
- 05000368/LER-1978-016-03, /03L-0 on 781109:during Mode 3 Oper,Emergency Diesel Generator B Tripped from 100% Load.Caused by Damage to Rod & Main Bearings,Crankshaft & Pistons,Perhaps Due to Loose Baseplate Mounting Screw (← links)
- 05000368/LER-1978-016, Forwards LER 78-016/03L-0 (← links)
- 05000368/LER-1978-019-03, /03L-0 on 781129:Chilled Water Return Containment Isolation valve,2CV3850-2,was Taken Out of Svc to Repair Control Room Communication Breaker Contacts.Breaker Was Changed to Type AB Contacts (← links)
- 05000368/LER-1978-018-03, /03L-0 on 781128:both Doors of the Personnel Hatch Doors Were Simultaneously Opened,Caused by a Sheared Mechanical Door Interrlock Gear Key.Mechanical Interlock Repairs Made & Containment Air Lock Declared Operable (← links)
- 05000368/LER-1978-018, Forwards LER 78-018/03L-0 & 78-019/03l-0 (← links)
- 05000368/LER-1978-017, Forwards LER 78-017/01T-0 & RO 50-368/78-17 (← links)
- 05000368/LER-1978-010-01, /01T-0 on 781102:during Post-Core Hot Functional Test,Prior to Initial Criticality Mode 3 Oper,Lift Setpoints of Main Steam Line Code Safety Valves Were Nonconservative. Caused by Incorrect Identification of Simmer Point (← links)
- 05000368/LER-1978-010, Forwards LER 78-010/01T-0 (← links)
- 05000368/LER-1978-015-01, /01T-0 on 781108:technician Installed Replacement Speed Switch in B Emergency Diesel Generator W/O Having Job Order Approved by Shift Supervisor.Due to Forgetfulness of Instru Technician (← links)
- 05000368/LER-1978-014-01, /01T-0 on 781107:during Mode 3 Oper,Noted That First Cycle Plant Protec Sys Setpoint Changes Req by Rosemont Pressure Transmitter Substitution Were Less than Conservative.Caused by Failure to Change Setpoint (← links)
- 05000368/LER-1978-013-01, /01T-0 on 781107:received Notice That Speed Switch Made by Dynalog Corp Had Design Problem That Could Cause Failure.Speed Switch Replaced (← links)
- 05000368/LER-1978-012-03, /03L-0 on 781107:during Post-Core Hot Functional Testing B Condensate Storage Tank Dropped Below Tech Spec Minimum.Caused by Inability of Makeup Plants to Produce High Demand for Condensate (← links)
- 05000368/LER-1978-012, Forwards LER 78-012/03L-0, 78-013/01T-0, 78-014/01T-0 & 78-015/01L-0 (← links)
- 05000368/LER-1978-009-03, /03L-0 on 781006:during Post-Core Hot Functional Test,Prior to Initial Criticality,Mode 3 Oper,Emergency Feedwater Valve 2CV-1025-1,hydraulic Pump Motor Failed. Motor Was Replaced & Tested Successfully (← links)
- 05000368/LER-1978-009, Forwards LER 78-009/03L-0 (← links)
- 05000368/LER-1978-008-03, /03L-0 on 781005:During Post-Core Hot Functional Testing,Pressurizer Code Safety Valve Was Gagged to Eliminate Weepage.Weepage Occurred Following Corrective Maintenance.Valve Was Allowed to Cool & Proper Oper Proved (← links)
- 05000368/LER-1978-008, Forwards LER 78-008/03L-0 (← links)
- 05000368/LER-1978-007-03, /03L-0:on 780917,RCS Chloride Concentration Reduced to Less than 0.15ppm.Engineering Evaluation Determined Condition Should Have No Effect on Structural Integrity of RCS Based on out-of-limit Condition (← links)
- 05000368/LER-1978-005-03, /03L-0:on 780916,during Mode 3 Operation Prior to Initial Criticality,Onsite AC Power Distribution Sys Deenergized.Caused by Bus Feeder Breakers Tripping on Low Voltage Due to Overloading.Setpoints Adjusted (← links)
- 05000368/LER-1978-004-03, /03L-0:on 780916,during Mode 3 Operation,Prior to Initial Criticality,Autotransformer Tripped from Timed Overcurrent.Caused by Feeding Both Unit Auxiliary Loads After Unit 1 Reactor Trip.Overcurrent Adjusted (← links)
- 05000368/LER-1978-003-03, /03L-0:on 780912,during Mode 3 Operation,Cst B Level Dropped to Less than 80% W/Cst a at About 10%.Caused by Inability of Makeup Tank to Produce Enough Quality Water to Maintain Level (← links)
- 05000368/LER-1990-017, :on 900718,void Discovered in Grout Sealed Tech Spec Fire Barrier Penetration.Caused by Personnel Error. Individual Counseled & Seal Will Be Restored to Operable Status by 901001 (← links)
- 05000368/LER-1982-027-03, /03L-0:on 820811,while at 82% Full Power,Position Indication for Control Element Assembly 67 Calculator Malfunctioned.Caused by Spikes at Random Intervals in Incoming Rspt Voltage (← links)
- 05000368/LER-1982-026-03, /03L-0:on 820802,while in Power Escalation at 5% power,C-E Discovered Core Protection Calculator Software Inconsistency Re Penalty Factors Associated W/ Control Element Assembly Calculators.Caused by Design Error (← links)
- 05000368/LER-1982-021-03, /03L-0:on 820603,during Mode 3,main Feedwater Isolation valve,2CV-1024-1,for Steam Generator a Failed to Close Completely.Caused by Design Problem in Large Valve Operators & Electrical Operation After Manual Operation (← links)
- 05000368/LER-1982-020-03, /03L-0:on 820529,during Power Escalation,Battery Bank 2D01 Voltage Dropped to 121-volts Dc.Caused by Primary Voltage Supply to Inverters 2Y-11,2Y-13 & 2Y-25 Switching to Battery Bank 2D01 (← links)
- 05000368/LER-1982-024-03, Containment High Range Radiation Monitor 2RITS-8925-Z Failed.Caused by Inadequate Tightening of Power Supply Leads in Instrument Cabinet (← links)
- 05000368/LER-1990-020, :on 900928,motor-operated Valved Failed to Close on Main Condenser Circulating Water Pump Resulting in Loss of Vacuum & Subsequent Manual Reactor Trip (← links)
- 05000368/LER-1990-021, :on 900927,discovered That Pressurizer & Steam Generator Low Pressure Variable Setpoint Trips Not Calibr Per Tech Specs.Caused by Procedure Deficiencies.Procedures Will Be Reviewed (← links)
- 05000368/LER-1982-025-03, /03L-0:on 820709,during Mode 1,emergency Feedwater Block Valve Failed to Close Following Monthly Surveillance Test.Caused by Worn Blocking Arm at Point of Contact Between Arm & Adjustment Screw.Mechanism Adjusted & Tested (← links)
- 05000368/LER-1990-019, :on 900821,steam Generator B MSIV Closed Fully Resulting in Automatic Reactor Trip Generated by Core Protection Calculators.Caused by Failure of Solenoid. Solenoid Replaced (← links)
- 05000368/LER-1989-025, :on 891221,identified That Portion of Wall Located in Auxiliary Bldg Had Not Been Previously Identified as Tech Spec Fire Barrier.Caused by Personnel Error.Portion of Wall Upgraded to Tech Spec Status (← links)
- 05000368/LER-1990-014, :on 900626,automatic Reactor Trip Occurred Due to Erroneous Control Element Assembly Position Indication (← links)
- 05000368/LER-1993-002-02, :on 931022,discovered That Containment Sump Integrity Inadequate to Prevent Entry of Foreign Matl. Caused by Initial Const Deficiency.Temporary Mod Installed to Provide Plates Over Holes (← links)
- 05000368/LER-1982-023-03, /03L-0:on 820611,21 & 22 Supply Breaker for Battery Charger 2D34 Tripped.Caused by Breaker Tripping Too Soon.Breaker Replaced.Further Testing & Analysis Will Be Performed to Determine Root Cause (← links)
- 05000368/LER-1990-015, :on 900628,channel Functional Tests for Logarithmic Power Level Nuclear Instrumentation Found to Be Inadequate.Caused by Personnel Error Re Plant Procedure Development.Plant Startup Procedure Revised (← links)
- 05000368/LER-1990-013, :on 900530,degraded Fire Barrier Penetration Discovered During Routine Tour of Auxiliary Bldg.Caused by Improper Sealing of Penetration While in Breached Condition. Fire Barrier Sealed & Personnel Counseled (← links)
- 05000368/LER-1989-022, :on 891114,4,160-volt Ac ESF Electric Bus Unexpectedly Deenergized During post-maint Testing on Auxiliary Relay.Caused by Inadequate Test Controls.Job Order Changed to Include Test Switch (← links)
- 05000368/LER-1990-011, :on 900425,discovered That post-accident Hydrogen Analyzers Did Not Appear Independent Due to Sharing Common Nitrogen Bottle Supplies.Caused by Design Oversight. Plant Mod Re Nitrogen Supplies Initiated (← links)
- 05000368/LER-1982-022-03, /03L-0:on 820614,containment Atmosphere Gaseous & Particulate Radioactive Monitoring Sys Sample Pumps 2RITS-8271-2 & 2RITS-8231-1 Not Operating.Caused by Lost Suction & Low Air Flow.Air Flow Adjusted & Pump Restarted (← links)
- 05000368/LER-1982-017-03, /03L-0:820505,while in Mode 3,increased Leak Rate Noted in Pressure Sensing Line for RCS Middle Seal.Caused by Crack of Undetermined Origin in Weld on First Elbow Downstream of Reactor Coolant Pump Seal Flange (← links)
- 05000368/LER-1982-011-99, /99X-0:on 820415,at 100% Full Power,Leak Found Inside Containment in B Steam Generator Blowdown Line Between Valve 2CV-1065 & Containment Penetration 2P-64. Caused by Erosion Due to Steam/Water Impingement on Piping (← links)
- 05000368/LER-1982-015-03, /03L-0:on 820428,discharge Control Valve 2CV-1036 from Emergency Feedwater Pump B (2P-7B) to Steam Generator B (2E-24B) Failed to Close.Cause Not Determined.Valve Manually Tripped,Recycled & Returned to Svc (← links)
- 05000368/LER-1982-016-03, /03L-0:on 820505,electrolyte Levels of Battery Cells in 2D-12 Found Above Max Tech Spec Levels.Caused by Over Charging Battery to Raise Cell Voltages.Electrolyte Removed from Cells (← links)
- 05000368/LER-1982-013-01, /01T-0:on 820503,while in Mode 1 at 88% Full Power,Battery 2D-12 Had Pilot Cell W/Voltage Less than Tech Specs.Caused by Inadequate Review of Operator Surveillance Logs.Battery Restored (← links)
- 05000368/LER-1982-013, Forwards LER 82-013/01T-0 (← links)
- 05000368/LER-1982-014-03, /03L-0:on 820416,during Controlled Shutdown,Main Feedwater Isolation Valve 2CV-1024-1 for Steam Generator a Failed to Meet Limiting Stroke Time of 20-s.Caused by Weak Spring Allowing Sliding Gear Clutch to Skip Over Drive Lu (← links)
- 05000368/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000368/LER-1982-010-03, /03L-0:on 820408,both a Reactor Coolant Pump Differential Pressure Indications Failed.Caused by Moisture Shorting Terminations in Transmitter Casings.Moisture Removed.Terminations Cleaned (← links)
- 05000368/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000368/LER-1982-009-03, /03L-0:on 820401,control Element Assembly Calculator 2 Failed During Performance of ex-core Instrument Test on Channel D.Caused by Computer Scan Inconsistency. Penalties Applied & Indication Returned to Normal (← links)
- 05000368/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000368/LER-1981-035-03, /03L-0:on 811005,while in Mode 5 for Repairs,Flow Measurements on Seal Water Cooler 2E52B for Low Pressure Safety Injection Pump B Had Low Flow of 3.5 Gpm.Caused by Carbon Steel Pipe Partially Plugged W/Corrosion (← links)
- 05000368/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000368/LER-1982-008-03, /03L-0:on 820226,emergency Feedwater Control Valve 2CV-1075-1 Failed to Operate During Stroke Test.Caused by Failure of silicon-controlled Rectifier (SCR) & Open Lead in Motor.Scr & Motor Replaced (← links)
- 05000368/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000368/LER-1993-001-04, :on 930513,discovered That One Channel of Rvlms Inoperable Since Probe Replaced in Oct 1992.On 930507, Discovered That Two Sensors in Rvlms Indicating Wet.Caused by Design Error.Wiring Polarity Corrected (← links)
- 05000368/LER-1990-012, :on 900430,18 Month Channel Calibr of Liquid Radwaste Effluent Line Flow Monitor Not Performed as Required.Caused by Inadequate Controls to Ensure Followup Actions Taken in Timely Manner.Amends Revised (← links)
- 05000368/LER-1990-010, :on 900401,personnel Failed to Complete Control Element Assembly Position Log.Caused by Surveillance Program Deficiencies & Lack of Mgt Involvement.Shift Briefing Completed & Procedure Change Incorporated (← links)
- 05000368/LER-1990-008, :on 900311,determined That Seal Leakage Test for Containment Personnel Air Lock Had Not Been Performed, Per Tech Specs.Caused by Personnel Error.Procedure Revs Initiated & Personnel Counseled (← links)
- 05000368/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000368/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000368/LER-1981-044-03, Appropriate Departure from DNBR Penalty Factors Not Included in Core Operating Limits Supervisory Sys & DNBR Calculations.Calculations Changed.Supercedes 820219 Submittal (← links)
- 05000368/LER-1981-044, Forwards Revised LER 81-044/03X-1 (← links)
- 05000368/LER-1982-005-03, /03L-0:on 820128,control Element Assembly Calculator 1 Erroneously Indicated Control Element Assembly 61 Not at Same Position as Other Rods in Group.Caused by Defective High Level Max Gate Card.Card Replaced (← links)
- 05000368/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000368/LER-1982-004-03, /03L-0:on 820126,control Element Assembly 22 Dropped While Moving Part Length Rods for Axial Shape Index Control.Caused by Sluggish Upper Gripper.Time That High Voltage Is Applied to Upper Gripper Extended (← links)
- 05000368/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000368/LER-1982-001-01, /01T-0:on 820107,determined That Six RCS Resistance Temp Detectors Did Not Meet Required Response Time.Caused by Couplant Used in Wells Drying Out & Not Providing Adequate Contact or Coupling (← links)
- 05000368/LER-1982-001, Forwards LER 82-001/01T-0 (← links)
- 05000368/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000368/LER-1982-002-03, /03L-0:on 820119,control Power Fuse in Motor Control Ctr for Valve Operation Found Open.Cause Not Stated. Fuse Replaced,Tested & Returned to Svc.Engineering Investigation Underway (← links)
- 05000368/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000368/LER-1981-034-99, Internal Damage Discovered on Emergency Feedwater Pump Turbine Steam Supply Check Valves 2MS-39A & 2MS-39B.Caused by Use of Wire Instead of Pin to Hold Disk Stud Retainer Nut on (← links)
- 05000368/LER-1981-034, Forwards Updated LER 81-034/99X-1 (← links)
- 05000368/LER-1981-045-03, /03L-0:on 811211,while in Mode 2 Operation, Emergency Feedwater Control Valve 2CV-1036 Failed to Close from Control Room Handswitch.Cause Undetermined.Evaluation of Failure in Progress (← links)
- 05000368/LER-1981-045, Forwards LER 81-045/03L-0 (← links)
- 05000368/LER-1981-043-03, /03L-0:on 811117,indication Lights for 2CV-1427-2, Control Valve for Svc Water to Auxiliary Cooling Water Sys, Were Not Illuminated During Routine Control Room Panel Checks.Caused by Open Power Fuse in Motor Control Ctr (← links)
- 05000368/LER-1981-043, Forwards LER 81-043/03L-0 (← links)
- 05000368/LER-1981-042-03, /03L-0:on 811110,conduit Cover Found Missing from 1-inch Conduit Penetrating Firewall.Caused by Failure to Install Cover.Fire Watch Established & Cover Reinstalled (← links)
- 05000368/LER-1981-042, Forwards LER 81-042/03L-0 (← links)
- 05000368/LER-1981-041-03, /03L-0:on 811106,A Steam Generator Sample Containment Isolation Valve Failed to Respond During Stroke Test.No Failure Cause Evident.Valve Functioned Correctly in Subsequent Series of Operations (← links)
- 05000368/LER-1981-041, Forwards LER 81-041/03L-0 (← links)
- 05000368/LER-1990-009, :on 900323,determined That Inadequate Channel Functional Test Performed on 480-volt ESF Undervoltage Relays.Caused by Change in Current Industry Practices Re Level of Testing.New Testing Procedure Written (← links)
- 05000368/LER-1981-039-03, /03L-0:on 811105,output Breaker of Battery Charger 2D34 Tripped Open While Supplying Dc Loads.Cause Undetermined.Investigation Continuing (← links)
- 05000368/LER-1981-039, Forwards LER 81-039/03L-0 (← links)
- 05000368/LER-1981-040-03, /03L-0:on 811106,B Control Room Emergency Chiller 2VE-1B Failed to Operate.Caused by Low Freon Charge Due to Leaking Fitting on Valve.Leak Repaired,Unit Recharged & Returned to Standby Svc (← links)
- 05000368/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000368/LER-1981-033, Forwards LER 81-033/04L-0 (← links)
- 05000368/LER-1981-038, Forwards LER 81-038/03L-0 (← links)
- 05000368/LER-1981-037-03, /03L-0:on 811006,small Pipe Hanger for a Low Pressure Safety Injection Pump Cooler Outlet Piping Discovered Missing.Caused by Const Mod Removing Hanger Due to Interference.Hanger Replaced (← links)
- 05000368/LER-1981-037, Forwards LER 81-037/03L-0 (← links)
- 05000368/LER-1981-036-03, /03L-0:on 811003,during Conduit Installation,Hole Was Discovered in Congested Area of Wall Between Cable Spreading Room & Motor Control Ctr Room.Caused by Insufficient QA During Initial Const.Penetration Sealed (← links)
- 05000368/LER-1981-036, Forwards LER 81-036/03L-0 (← links)
- 05000368/LER-1981-032-03, /03L-0:on 810815 & 0901,flowpaths to 4 Steam Generators Found Inoperable Due to Failures of Emergency Feedwater Flow Valves.First Event Caused by Relay Failure & Second by Hydraulic Pressure Loss Due to Leaking Seal (← links)
- 05000368/LER-1981-032, Forwards LER 81-032/03L-0 (← links)
- 05000368/LER-1991-006, :on 910222,core Protection Calculator Reactor Coolant Sys Flow Channels Not Being Calibrated within Tech Spec.Caused by Personnel Error.Operations Manager Counseled Operators Involved in Event (← links)
- 05000368/LER-1991-004, :on 910125,control Room Radiation Monitor Alarm/Trip Setpoint Greater than Normal.Caused by Personnel Error.Operations Manager Will Counsel Shift Supervisors & Night Order Will Be Posted (← links)
- 05000368/LER-1983-001-03, /03L-0:on 830106,during Mode 1,control Room Emergency Air Conditioner 2VE-1B Failed Surveillance Test Due to Excessive Compressor Cycling.Caused by Low Freon Due to Leak on Discharge Relief Valves.Valve Will Be Replaced (← links)
- 05000368/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000368/LER-1982-033-03, In Mode 6,safety Injection Check Valve LSI-13C Stuck in Open Position When Stroked by Hand.Caused by Protruding Valve Disc Stud Interfering W/Body & Holding Disc in Open Position (← links)
- 05000368/LER-1982-033, Forwards Corrected LER 82-033/03L-1 (← links)
- 05000368/LER-1982-050-03, /03L-0:on 821222,at 100% Power,Control Room a Emergency Chiller ZVE-1A Failed Monthly Surveillance Test Due to Excessive Cycling.Caused by Low Freon Charge Due to Leak on Pressure Gauge Fitting.Leak Repaired & Freon Added (← links)
- 05000368/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000368/LER-1982-049-03, /03L-0:on 821221,level Decrease in Vol Control Tank & Increased Reading on Auxiliary Bldg Stack Monitor Noted,Indicative of Leak.Caused by Wornout Packing.Pump Repacked (← links)
- 05000368/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000368/LER-1982-046-03, /03L-0:on 821211,while Starting Cooldown in Mode 3,main Feedwater Isolation Valve Failed to Operate. Caused by Insufficient Clutch Spring Force.Damaged Internal Components Replaced & Tested (← links)
- 05000368/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000368/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000368/LER-1982-040-03, /03L-0:on 821122,during Mode 2 Operation,Control Element Assembly Calculator 2 Failed.Caused Undetermined. Calculator Reinitialized & Returned to Svc (← links)
- 05000368/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000368/LER-1982-043-03, /03L-0:on 821205,core Operating Limit Supervisory Sys (COLSS) Power Operating Limit Alarm Received.Caused by Procedural Error in That Proper Penalty Factor for Test Configuration Not Required to Be Inserted Into COLSS (← links)
- 05000368/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000368/LER-1978-006-03, /03L-0:on 780916,during Mode 3,prior to Initial Criticality,Raw Water Tank Level Dropped Below Tech Specs. Caused by ECCS Actuation Due to Loss of Relay Power to ECCS Components & Inverter Failure.Tank Level Increased (← links)
- 05000368/LER-1982-039-03, /03L-0:on 821112,degraded Fire Barrier Existed Due to Unsealed Piping Penetrations.Caused by Personnel Error Arising from Insufficient Instruction on Applicable Design Change Documentation.Penetrations Sealed (← links)
- 05000368/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000368/LER-1990-006, :on 900305,instrumentation Channels Declared Inoperable,Resulting in Manual Actuation of Reactor Protection Sys.Caused by Procedural Deficiencies.Functional Tests of Log Power Level Channels Performed (← links)
- 05000368/LER-1989-027-01, :on 891005,determined That Leakage Rate for Containment Isolation Check Valve in Excess of Leakage Rate Allowed Per Tech Specs.Caused by Loose Weld Slag in Valve Seat Area.Valve Cleaned & Reassembled (← links)
- 05000368/LER-1990-007, :on 900306,RCS Charging Line Rendered Inoperable Due to Deficient Piping Support Weld.Caused by Inadequate Work Controls & post-installation Insp Processes. Field Walkdowns & Weld Insps Initiated (← links)
- 05000368/LER-1990-004, :on 900212,identified That No Backwater Valve Located in Floor Drain Pipe in One of Emergency Feedwater Pump Rooms.Caused by Inadequate Configuration Control. Valves Installed on 900215 (← links)
- 05000368/LER-1985-029, :on 850520,unusual Motor Vibrations Identified on Svc Water Pump 2PM4A.On 861028,high Vibrations Noted on Upper Motor Bearings of Pump 2PM4B.Caused by Improper Installation.New Bearings Installed (← links)
- 05000368/LER-1990-003, :on 900201,failure to Perform Monthly Source Check Surveillance on Three Radiation Process Monitors Occurred.Caused by Inadequate Procedure Change by Personnel. Source Check on Monthly Basis Implemented (← links)
- 05000368/LER-1990-001, :on 900126,identified That Required Visual Insps of Containment Bldg After Entry Made Not Documented as Being Performed.Caused by Inadequate Procedural Guidance. Administrative Controls to Be Established (← links)
- 05000368/LER-1989-026-01, :on 891112,gaps in Piping Supports on Supply & Return Piping for Containment Coolers Identified.Caused by Inadequate Design Technique Used in Original Support Design. Shims Added Before Restart from Outage (← links)
- 05000368/LER-1990-002, :on 900131,errors Identified in Calculation Used to Establish Calibr Tables for Steam Generator Water Level Transmitters.Caused by Incorrect Static Pressure Assumption.Trip Setpoint Bistable Increased (← links)
- 05000368/LER-1989-012, :on 890626,RCS Backleakage Through Safety Injection Sys Check Valve Occurred Three Times.Caused by Missing Rollpins Which Connect Valve Disc to Valve Disc Shaft.Rollpins Replaced & Valves Reassembled (← links)
- 05000368/LER-1989-024-01, :on 891231,loose Terminal in Feedwater Control Sys Cabinet Resulted in Reactor Trip.Caused by Loose Connection on Terminal.Loose Connection Reterminated Properly (← links)
- 05000368/LER-1989-023-01, :on 891117,approach to Criticality Commenced After Seventh Refueling Outage W/Logarithmic Power Level Channels Inoperable.Caused by Electrical Noise in Circuitry. Defective Preamplifier Replaced (← links)
- 05000368/LER-1981-030-03, /03L-0:on 810731,during Design Mod Check of Remote Control Hydrogen Analyzer Sample Pump 2P162,found No Air Flow Delivered to One Analyzer.Cause Undetermined.Sample Pump Operable within 30 Days (← links)
- 05000368/LER-1981-030, Forwards LER 81-030/03L-0 (← links)
- 05000368/LER-1981-031-03, /03L-0:on 810808,during Axial Shape Index Dampening Maneuver,Part Length Control Element Assembly Dropped & Became Inoperable.After Repair,Dropped Again on 810809.Caused by Poor Connection of Coil Driver Card (← links)
- 05000368/LER-1981-031, Forwards LER 81-031/03L-0 (← links)
- 05000368/LER-1981-029-03, /03L-0:on 810806,two Unsealed Wall Fire Barrier Penetrations Found W/O Proper Fire Watch.Caused by Inadequate Instructions to Contractor Personnel.Fire Watch Set Up & Maintained Until Fire Barrier re-established (← links)
- 05000368/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000368/LER-1981-026-03, /03L-0:on 810714,refueling Water Tank Discharge Valve 2CV-5630 Failed in Open Position on Safety Injection Actuation Signal Rendering Valve Inoperable to Recirculation Actuation Signal.Caused by Burned Up Valve Motor (← links)
- 05000368/LER-1981-026, Forwards LER 81-026/03L-0 (← links)
- 05000368/LER-1981-025-03, Fire Developed on Exhaust Header of Diesel Engine.Caused by Oil Soaked Insulation Igniting When Exhaust Temp Reached Approx 1000 F.Manifold Cleaned & Gasket Changed (← links)
- 05000368/LER-1981-025, Forwards Updated LER 81-025/03X-1 (← links)
- 05000368/LER-1981-028-03, /03L-0:on 810725,during Mode 1 Operation,Charging Pump 2P36A Seal Failed.Caused by Malfunctioning Discharge Check Valve Due to Foreign Matl Trapped Between Disc & Seat. Pump & Valve Repaired (← links)
- 05000368/LER-1981-028, Forwards LER 81-028/03L-0 (← links)
- 05000368/LER-1981-027-03, /03L-0:on 810727,control Room Ventilation Radiation Monitor 2RE-8750 Failed Above High Alarm Setpoint. Caused by Loose Internal Connection,Possibly Due to Vibration.Detector Replaced (← links)
- 05000368/LER-1981-027, Forwards LER 81-027/03L-0 (← links)
- 05000368/LER-1981-024-03, /03L-0:on 810627,containment Pressure,Air Temp & Relative Humidity Were Outside Acceptable Tech Spec Stds. Caused by Main Chiller Tripping (← links)
- 05000368/LER-1981-024, Forwards LER 81-024/03L-0 (← links)
- 05000368/LER-1981-023-03, /03L-0:on 810625,pressurizer Code Safety Valve 2PSV-4833 Seat Leakage Found.Cause Not Stated.Valve Gagged & Returned to Svc (← links)
- 05000368/LER-1981-023, Forwards LER 81-023/03L-0 (← links)
- 05000368/LER-1981-022-03, /03L-0:on 810610,control Room Ventilation Radiation Monitor Trip Setpoint Found to Be More than Two Times Background Radiation.Caused by Erroneous High Alarm Setpoint Value Listed on Front of Drawer.Setpoint Changed (← links)
- 05000368/LER-1981-022, Forwards LER 81-022/03L-0 (← links)
- 05000368/LER-1981-010-03, /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal (← links)
- 05000368/LER-1981-010, Forwards LER 81-010/03L-0 (← links)
- 05000368/LER-1981-007-03, /03L-0:on 810206,control Room Emergency Chiller, 2VE-1B,tripped.Caused by Low Suction Pressure Due to Leaking Expansion Valve.Valve Repaired & Sys Refilled W/Freon (← links)
- 05000368/LER-1981-006-03, /03L-0:on 810204,containment Sump Level Indicator 2LI-5645-1 Was Declared Inoperable.Caused by Defective Converter.Converter Replaced (← links)
- 05000368/LER-1981-005-03, /03L-0:on 810204,core Operating Limit Supervisory Sys Rendered Inoperable.Caused by Computer Failure.Software Reloaded & Computer Restarted.Backup Computer Will Be Installed (← links)
- 05000368/LER-1981-005, Forwards LER 81-005/03L-0 (← links)
- 05000368/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000368/LER-1989-023, :on 891117,noted That Channel a Not Responding to Change in Power Level & Declared Inoperable.Caused by Defective Preamplifier.Evaluation of Sys Design & Channel Functional Test Initiated (← links)
- 05000368/LER-1989-005, :on 890518 & 25,damping Board Removed from Penetration Containing Cable Tray.On 890531,voids Noted in Penetration Seals.Caused by Erroneous Vendor Procedures. Penetrations Restored & Procedures Revised (← links)
- 05000368/LER-1981-021-99, /99X-0:on 810528,RCS Iodine Levels Increased, Indicating Failure of 20 to 30 Fuel Rods.Cause Being Investigated by Periscope Exam of Rods & Discharged Bundles. Leaking Assemblies Isolated,Reconstituted & Resipped (← links)
- 05000368/LER-1981-021, Forwards LER 81-021/99X-0 (← links)
- 05000368/LER-1981-020-03, /03L-0:on 810520,two Source Range Neutron Flux Monitor Signals Increased Suddenly.Probably Caused by Noise Interference.Investigation Underway.Cables & Connectors to Be Changed During Next Refueling Outage (← links)
- 05000368/LER-1981-020, Forwards LER 81-020/03L-0 (← links)
- 05000368/LER-1981-011-03, /03L-0:on 810224,review of Plant Protection Sys Surveillance Procedure Identified That Channel A,Steam Generator High Level Trip Setpoint Less Conservative than Required.Caused by Deficiency in Surveillance Procedure (← links)
- 05000368/LER-1981-011, Forwards LER 81-011/03L-0 (← links)
- 05000368/LER-1981-018-03, /03L-0:on 810506,during Mode 6 Operation,Emergency Diesel Generator 2 Received Lockout During Load Rejection Test.Caused by Antimotoring Relay Holding Coil Adjustment Intolerance.Adjustments Made.Procedures Revised (← links)
- 05000368/LER-1981-018, Forwards LER 81-018/03L-0 (← links)
- 05000368/LER-1981-017-99, /99L-0:on 810424,during Mode 1 operation,30 Out of 32 Resistance Temp Detectors Did Not Meet Tech Spec Response Time Limit of 6-s.Caused by Inadequate Contact of Couplant Thermowells.Wells Cleaned & Visually Inspected (← links)
- 05000368/LER-1981-017, Forwards LER 81-017/99L-0 (← links)
- 05000368/LER-1981-015-03, /03L-0:on 810406,RCS Chloride Concentration Trended Upward to High of 0.18 Ppm.Caused by Purification Demineralizer in Svc Which Had Slightly Higher Chloride Concentration than Sys Concentration (← links)
- 05000368/LER-1981-015, Forwards LER 81-015/03L-0 (← links)
- 05000368/LER-1980-047, Forwards Updated LER 80-047/03X-1 (← links)
- 05000368/LER-1981-003-03, /03L-0:on 810113,plant Computer Failed & Would Not Restart,Rendering Core Operating Limits Supervisory Sys Inoperable.Caused by Capacitor in Floating Point Power Supply & Generstor Noise Due to Short.Capacitor Replaced (← links)
- 05000368/LER-1981-003, Forwards LER 81-003/03L-0 (← links)