Pages that link to "05000155/LER-1982-001, Forwards LER 82-001/03L-0"

The following pages link to 05000155/LER-1982-001, Forwards LER 82-001/03L-0:

Displayed 44 items.

• 05000155/LER-1982-021, Forwards LER 82-021/03L-0 ‎ (← links)
• 05000155/LER-1982-022, Forwards LER 82-022/03L-0 ‎ (← links)
• 05000155/LER-1982-020, Forwards LER 82-020/03L-0 ‎ (← links)
• 05000155/LER-1982-019, Forwards LER 82-019/03L-0 ‎ (← links)
• ML20054K862 ‎ (← links)
• 05000155/LER-1982-018, Forwards LER 82-018/01T-0 ‎ (← links)
• 05000155/LER-1982-021-03, /03L-0:on 820707,both Open & Closed Position Indication Lights Remained on When Backup Core Spray Valve M07071 Returned to Normal Closed Position.Caused by Misaligned Open Position Switch.Switch Adjusted ‎ (← links)
• 05000155/LER-1982-022-03, /03L-0:on 820702,during post-implementation Review of Recent Facility Change,One Pair of Flanges in 8-inch Fire Sys Piping Did Not Meet Facing Requirements.Caused by Engineer Error,To Be Corrected at Outage ‎ (← links)
• 05000155/LER-1982-020-03, /03L-0:on 820622,reactor Depressurizing Sys Isolation Valves on Two of Four Loops Not Returned to Operable Status.Caused by Slide Links Inadvertently Left Open,Due to Operator Error ‎ (← links)
• 05000155/LER-1982-019-03, /03L-0:on 820618,emergency Diesel Generator Failed to Start During Routine Test Scheduled for Every Third Day. Caused by Dirty Contacts on Starting Circuit Control Relays. Relays Cleaned ‎ (← links)
• 05000155/LER-1982-018-01, /01T-0:on 820525,following Water Loss in Open Tank for Reactor Bldg Heating & Cooling Sys,Testing Revealed Tube Leakage in B Heating & Cooling Sys Heat Exchanger.Caused by Corrosion.Evaluation of Fluid Characteristics Planne ‎ (← links)
• 05000155/LER-1982-013-01, /01T-0:on 820328,during Drainage of Primary Sys Water Level,Steam Drum Level Indication Failed to Register Proper Water Level.Caused by Inadequate Procedure Re Filling Level Transmitter Ref Lines.Procedures Will Be Revised ‎ (← links)
• 05000155/LER-1982-013, Forwards LER 82-013/01T-0 ‎ (← links)
• ML20054C235 ‎ (← links)
• 05000155/LER-1982-014-03, /03L-0:on 820422,chemical Waste Tank Recycle Line Leak Discovered.Spillage Contained in Radwaste Collection Sys.Caused by long-term Corrosion & Excessive Acid Use During 820422 Makeup Regeneration ‎ (← links)
• 05000155/LER-1982-014, Forwards LER 82-014/03L-0 ‎ (← links)
• 05000155/LER-1982-012-03, /03L-0:on 820402,backup Compressed Gas Supply for Valves in One Loop of Containment Vacuum Relief Sys Failed to Maintain Adequate Pressure When Air Instrument Sys Was Vented.Caused by Unreliable Seating Characteristics ‎ (← links)
• 05000155/LER-1982-012, Forwards LER 82-012/03L-0 ‎ (← links)
• ML20052D973 ‎ (← links)
• 05000155/LER-1982-009-03, /03L-0:on 820303,snubber PS-115B Judged Inoperable Due to Acceleration Test Failure.Exact Cause of Failure Not Known.Snubber Replaced ‎ (← links)
• 05000155/LER-1982-008-03, /03L-0:on 820309,during Routine Testing of Actuation Time Delays Units in Reactor Depressurization Sys Input Channels,Timing for Two of Four Channels Exceeded Tech Specs.Caused by Electronic Drift.Units Adjusted ‎ (← links)
• 05000155/LER-1982-009, Forwards LER 82-009/03L-0 ‎ (← links)
• 05000155/LER-1982-008, Forwards LER 82-008/03L-0 ‎ (← links)
• 05000155/LER-1982-007-03, /03L-0:on 820302,test Method for Conducting Component Type C Valve Leak Rate Tests for Three of 2-inch Process Lines Through Containment Found to Be Inadequate. Caused by Oversight in Development of Test Method in 1977 ‎ (← links)
• 05000155/LER-1982-007, Forwards LER 82-007/03L-0 ‎ (← links)
• 05000155/LER-1982-010-01, /01T-0:on 820318,during Type C Component Leak Rate tests,10-inch Feedwater Containment Check Valve Vfw 304 Exhibited Excessive Leakage.Caused by Iron Oxide Scale Deposit on Valve Seat.Seat Cleaned & Disc Replaced ‎ (← links)
• 05000155/LER-1982-010, Forwards LER 82-010/01T-0 ‎ (← links)
• 05000155/LER-1982-006-03, /03L-0:on 820224,reactor Cleanup Sys Resin Sluice Valve CV4093 Leaked in Excess of Tech Spec 3.7(b) Requirements.Cause Not Determined.Valve Seat Replaced.Valve Supplied by Worcestor Model 446 ‎ (← links)
• 05000155/LER-1982-006, Forwards LER 82-006/03L-0 ‎ (← links)
• ML20049J261 ‎ (← links)
• 05000155/LER-1982-005-03, /03L-0:on 820219,during Cold Shutdown,Leak Occurred at Threaded Fitting to Suction Side Relief Valve of Control Rod Drive Pump 1.Caused by Pipe Crack as Result of Fatigue from Vibration in Displacement Pump Sys ‎ (← links)
• 05000155/LER-1982-005, Forwards LER 82-005/03L-0 ‎ (← links)
• ML20042B008 ‎ (← links)
• 05000155/LER-1982-004-03, /03L-0:on 820210,trip Point for Low Level Trip Sensor Lt 3180 Found to Operate 2 Inches Below Setpoint. Cause of Calibr Drift Unknown.Unit Recalibr & Returned to Operable Status ‎ (← links)
• 05000155/LER-1982-004, Forwards LER 82-004/03L-0 ‎ (← links)
• 05000155/LER-1982-003-01, /01T-0:on 820128,investigation of Increased Water Collection in Reactor Containment Sump Revealed through-wall Leakage of 0.15 Gpm in Pipeway Air Cooler Unit B.Caused by Corrosion.Tubing Repaired & Unit Returned to Svc ‎ (← links)
• 05000155/LER-1982-003, Forwards LER 82-003/01T-0 ‎ (← links)
• 05000155/LER-1982-001-03, /03L-0:on 820111,during Quarterly Test of Reactor Depressurization Sys,Isolation Valve CV4180 Failed to Open, Making One Loop Inoperable.Caused by Valve Stem Seizure. Packing Lubricated & Valve Successfully Tested ‎ (← links)
• ML20040G717 (redirect page) ‎ (← links)
• 05000155/LER-1982-001 (redirect page) ‎ (← links)
  • 05000155/LER-1992-002, Advises That Commitment Due Dates for LER 92-002 Re as-found Setpoint Failure of Liquid Poison Relief Valve RV-5049 & LER 92-009 Re Reactor Scram During Plant Startup for Cycle 26 Overdue.Operator Training Delayed Until 930301 ‎ (← links)
  • 05000155/LER-1978-032, Forwards LER 78-032/03L-0.W/o Encl ‎ (← links)
  • 05000155/LER-1998-001, Forwards LER 98-001-00 Re Discovery During Facility Decommissioning of Severed Liquid Poison Tank Discharge Pipe.Rept Being Submitted IAW 10CFR50.72(b)(2)(iii) & 10CFR50.73(a)(2)(i)(B) ‎ (← links)
  • 05000155/LER-1987-009, Responds to NRC Re Violations Noted in Insp Rept 50-155/87-19.Events Cited in 870803 Encl LER 87-009.Issuance of Violation Contradicts NRC Policy to Encourage & Support Licensee Initiative to Identify & Correct Problems ‎ (← links)
  • 05000155/LER-1982-021, Forwards LER 82-021/03L-0 ‎ (← links)
  • 05000155/LER-1990-002, Requests Extension of Due Date for Radiation on-the-job Training to 901101,per 900518 LER-90-002 Describing Violation Involving Unqualified Technician Assigned to Shift Compliment.Delay Due to Forced Outage ‎ (← links)
  • 05000155/LER-1982-022, Forwards LER 82-022/03L-0 ‎ (← links)
  • 05000155/LER-1982-020, Forwards LER 82-020/03L-0 ‎ (← links)
  • 05000155/LER-1982-019, Forwards LER 82-019/03L-0 ‎ (← links)
  • 05000155/LER-1982-018, Forwards LER 82-018/01T-0 ‎ (← links)
  • 05000155/LER-1989-008-01, :on 890822,reactor Pressure Increased Rapidly Causing Reactor Trip on High Neutron Flux.Caused by Rapid Closure of Turbine Admission Valves Due to Gross Leakage. Control Rods Inserted & Cooling Maintained ‎ (← links)
  • 05000155/LER-1989-007-01, :on 890816,discovered That Detectors in Emergency Diesel Generator Room & Pump House Not Tested within 6 Month Interval.Caused by Lack of Understanding of Procedural Requirements.Fire Watch Established ‎ (← links)
  • 05000155/LER-1989-004-01, :on 890411,discovered That Pilot Cell Specific Gravity Was 1.199 & No Corrective Action Initiated,Resulting in Tech Spec Violation.Caused by Auxiliary Operator Error. Error Discussed W/Personnel ‎ (← links)
  • 05000155/LER-1989-005-01, :on 890222,resident Inspector Observed Some Degradation on Rubber Seal of Containment Vent Valve.Shift Supervisor Conducted 10CFR50,App J Type B Leak Rate Test & Found Unacceptable Leakage.Caused by Aging ‎ (← links)
  • 05000155/LER-1989-006-01, :on 890720,discovered That Small Holes Found on Barriers.Caused by Inadequate Maint Controls Which Resulted in Failure to Repair Penetration After Mod.Fire Watch/Patrol Established.Repairs Completed ‎ (← links)
  • 05000155/LER-1987-013-01, :on 871122,two CRDs Had Withdraw Times Exceeding Tech Spec 5.2.2a(iv) Limit.Caused by Greater Differential Pressure Across Drive Piston.All CRDs Retimed & Reset ‎ (← links)
  • 05000155/LER-1998-001-01, :on 980714,during Facility Decommissioning, Found Liquid Poision Tank Discharge Pipe Severed.Caused by Corrosion.Staff Reviewed Current Decommissioning Surveillance Testing on safety-related SSCs ‎ (← links)
  • 05000155/LER-1987-012-01, :on 871123,reactor Trip Occurred.Caused by Failure of Intermediate Range Neutron Monitoring Channel. Failed Logarithmic Amplifier Replaced & Channel Returned to Svc ‎ (← links)
  • 05000155/LER-1987-011-01, :on 871109,reactor Trip Occurred.Caused by Electrical Noise Inherent at Low Power Levels.Change Out of Power Range Instrumentation Planned ‎ (← links)
  • 05000155/LER-1987-003, :on 870127 & 0601,three Primary Safety Relief Valves Indicated Consistently High Initial as-found Setpoints.Caused by Bonding Effect of Lapping Compound. Valves Rebuilt & Retested on 871112 ‎ (← links)
  • 05000155/LER-1987-009-01, :on 870705,discovered That Planned Release Completed W/O Radwaste Effluent Monitor Being Valved Into Svc,Contrary to Radiological Effluent Tech Spec 13.1.1. Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000155/LER-1989-003, :on 880630,during Receipt Insp of Kerotest Globe Valve,Discovered That Valve Disc Assembly Rattled Inside Valve Body.Evaluation Implies That Overtorqued Condition Occurred After Shipment ‎ (← links)
  • 05000155/LER-1987-008-01, :on 870619,during Plant Outage,Walkdowns of Eeq Circuits Revealed 23 Unqualified Splices on Valve Position Indicating Circuits.Caused by Failure to Recognize Need to Upgrade Splices.All 23 Splices Replaced ‎ (← links)
  • 05000155/LER-1989-002, :on 890203,discovered That Sys Leak Tests Not Formally Completed Nor Has Specific Written Relief Been Requested of Nrc.Caused by Oversight During Development of 40 Yr Inservice Insp Plan ‎ (← links)
  • 05000155/LER-1989-001, :on 890120,identified Coordination Deficiency on Alternate Shutdown Battery Scheme.Caused by Faulty Fuse. Fuse Replaced ‎ (← links)
  • 05000155/LER-1987-010-01, :on 870910,reactor Protection Sys Actuation Occurred.Caused by Susceptibility of Neutron Instruments to Electrical Noise at Low Neutron Flux Levels.Reactor Protection Sys Reset ‎ (← links)
  • 05000155/LER-1987-006-01, :on 861104,EEQ Insp Rept Identified Unresolved Item Re Qualification of Rubber Insulated Cables.Caused by Inadequate File Documentation Showing Cable Similarity. Outage Initiated 870331 ‎ (← links)
  • 05000155/LER-1987-007-01, :on 870518,reactor Protection Sys Actuation Occurred During Normal Reactor Shutdown.Caused by Susceptibility of Picoameters to Electrical Noise at Low Neutron Flux Levels ‎ (← links)
  • 05000155/LER-1986-006-01, :on 860825,fire Barrier Determined to Be Nonfunctional & Fire Watch Not Established within 1 H.Caused by Procedural Inadequacy.Procedure Modified to Clarify Definition of Nonfunctional Fire Barriers ‎ (← links)
  • 05000155/LER-1987-002-01, :on 870203,setpoint of One Relay Registered .6 Volts Below Tech Spec Limit of 107.1 Volts.Caused by Relay Setpoint Drift.Relay Recalibr & Returned to Operable Status.Calibr Instructions Modified ‎ (← links)
  • 05000155/LER-1987-003-01, :on 870127,surveillance Testing Results of Primary Sys Safety Relief Valves Indicated Consistently High Initial Setpoints.Caused by Sticking Due to Lapping Compound Remaining on Seat & Disk Surface ‎ (← links)
  • 05000155/LER-1986-005-01, :on 860701,following Insertion of Trip on Picoammeter 1 During Testing,Inadvertent Trip of Picoammeter 2 Occurred,Initiating Reactor Scram.Caused by Cable Failure in Feedback Circuit.Cable Replaced ‎ (← links)
  • 05000155/LER-1987-004, :on 870203,snubbers Tested Failed to Meet Max Drag Force Requirements,Per Tech Spec 3.1.5.Failed Snubbers Replaced by Operable Spares.Failed Snubbers Returned to Mfg for Investigation & Repair ‎ (← links)
  • 05000155/LER-1987-004-01, :on 870203,two of Six Snubbers Tested Failed to Meet Max Drag Force Requirements.Cause Will Not Be Determined Until Snubber Mfg Examines Units.Failed Snubbers Returned to Mfg for Exam & Replaced W/Spares ‎ (← links)
  • 05000155/LER-1987-001, :on 870102,during Refueling Outage,Upscale/ Downscale Reactor Protection Sys Actuation Occurred.Caused by Electrical Noise Inherent at Low Power Levels.Picoammeter 2 Will Be Repaired & Tested ‎ (← links)
  • 05000155/LER-1986-004-01, :on 860604,station Battery Surveillance Requirement in Tech Specs Found to Be Contradictory.Tech Spec Change Request Will Be Submitted to Correct Contradiction ‎ (← links)
  • 05000155/LER-1986-003-01, :on 860527,discovered That Daily Analysis of Circulating Water Discharge Grab Samples Not Performed Per Tech Spec 13.1.1.1.b,following 860521 Canal Sample Pump Failure.Inadequate Procedures Strengthened ‎ (← links)
  • 05000155/LER-1988-008-01, :on 881028,load Rejection Occurred Due to Loss of Transmission Line.Caused by Lightning Rod Which Broke Off During High Winds.Control Rod Drive Motor Generator Set Repaired ‎ (← links)
  • 05000155/LER-1986-001-01, :on 860117,discovered That Three Fire Detectors in Recirculation Pump Room Not Tested During 1985 Refueling Outage.Caused by Procedural Deficiency.New Surveillance Procedure Approved on 860212 ‎ (← links)
  • 05000155/LER-1987-005-01, :on 870222,CRD Changeout Commenced W/Mode Switch in Refuel Position.Caused by Poor Communication Between Maint Crew & Control Room & Missed sign-off in Replacement Procedure.Personnel Counseled ‎ (← links)
  • 05000155/LER-1978-032-03, /03L-0 on 780819:Failure of Check Valve Providing Containment Integrity in 2 Demineralized Water Line Contributed to Containment of Plant Demineralized Water Sys Check Valve Repaired 780905 ‎ (← links)
  • 05000155/LER-1986-004, :on 860604,determined That Battery Svc Test Tech Specs Contradictory.Caused by Failure to Follow Through on Action Initiated in Oct 1977.Tech Spec Change Request Will Be Submitted by 860801 ‎ (← links)
  • 05000155/LER-1997-005-01, :on 971009,violation of Facility OL Was Discovered.Cause Cannot Be Determined.All Items Removed Except Cable & Hook Attached to B Rack ‎ (← links)
  • 05000155/LER-1988-002, :on 880205,plant Operators Manually Tripped Reactor in Response to Loss of Recirculation Flow.Caused by Personnel Error.Equipment Testing Performed to Insure That No Malfunctions Occurred or Damage Present ‎ (← links)
  • 05000155/LER-1988-004-01, :on 880531,determined That Lubricant in Limit Switch Assembly of Environmentally Qualified Limitorque Operators Was Different than Std Recommended by Vendor. Caused by Misinterpretation of Procedure ‎ (← links)
  • 05000155/LER-1988-007-01, :on 880629,plant Heat Balance Calculation Determined Reactor Power to Be 45.3% in Preparation for Power Range Monitor Calibr.Caused by Insufficient Gain & Sensitivity Adjustment of GE Monitors ‎ (← links)
  • 05000155/LER-1988-006-01, :on 880708,source Range Monitor Anomaly Resulted in Tech Spec Violation When High Voltage Removed from Source Range Monitors & Required Interlock Was Disabled.Slide Link Opened ‎ (← links)
  • 05000155/LER-1988-005-01, :on 880626,one Reactor Depressurization Timer Found Inoperative & Two Timers Found W/Setpoint Above 120 S. Caused by Use During Testing & Electronic Setpoint Drift, Respectively.Failed Timer Replaced ‎ (← links)
  • 05000155/LER-1988-001, :on 880202,reactor Protection Sys (Jc) Actuation Occurred.Caused by Personnel Error & Susceptibility of Picoammeters to Electrical Noise.No Immediate Corrective Actions Necessary ‎ (← links)
  • 05000155/LER-1994-008-01, :on 941018,one out-of-four Sensors Found out-of-tolerance in Nonconservative Direction.Caused by Setpoint Drift.Reactor Steam Drum Water Level Sensor LS-RE020A Reset within Required Tolerance ‎ (← links)
  • 05000155/LER-1978-034-03, /03L-0 on 780831:during Monthly Specific Gravity Readings on Reactor Depressurization Sys,Battery A,Cell 12 Read 1.193 Below Limit of 1.200 Specified in Tech Specs. Cause Unknown & Cell Was Replaced.(Encl to 7810060072) ‎ (← links)
  • 05000155/LER-1978-033-03, /03L-0 on 780829:during Tests of Automatic Containment Isolation Valves,Valve CV/4027 Exhibited Excessive Leakage.Valve & Piping Flushed & Leakage Test Repeated Satisfactorily.(Encl to 7810060072) ‎ (← links)
  • 05000155/LER-1978-033, Forwards LER 78-033/03L-0 ‎ (← links)
  • 05000155/LER-1978-035-01, /01L on 780904:During Test of Containment Ventilation Isolation Valves,Supply Valve CV/4097 Leaked in Excess of TS Criteria.Butterfly Valve Disc Seal Was Readjusted & Valved Returned to Svc. (Encl to 7809190156) ‎ (← links)
  • 05000155/LER-1978-035, Forwards LER 78-035/01L & LER 78-037-01L on 780906 ‎ (← links)
  • 05000155/LER-1986-002-01, :on 860211,leak Rate for Reactor Depressurization Sys Isolation Valves SV-4985,SV-4986 & SV-4987 Exceeded Tech Spec Limits.Caused by Quarterly Surveillance Test Aggravating Leaking Valves ‎ (← links)
  • 05000155/LER-1997-004, :on 970410,determined Potential Loss of DC Power for Primary Containment Spray & Liquid Poison Systems. Caused by Inadequate Design Control Program.Removed & Replaced Breaker 72-12 ‎ (← links)
  • 05000155/LER-1985-008-01, :on 851114,upscale/downscale Reactor Protection Sys Actuation Occurred.Caused by Electrical Noise.No Adverse Safety Consequences Occurred ‎ (← links)
  • 05000155/LER-1997-002, :on 970115,penetration Insp Was Not Performed IAW Ts.Process for Facility Change 462J,App R Penetration Nozzle Installation,Did Not Provide Adequate Review. Penetrations Were Inspected ‎ (← links)
  • 05000155/LER-1986-001, :on 860117,during Review of Fire Detection Test Procedures,Failure to Test Three Recirculation Pump Fire Detectors During 1985 Refueling Outage Noted.Caused by Procedural Inadequacy.Test Performed on 860215 ‎ (← links)
  • 05000155/LER-1985-009-01, :on 851207,reactor Manually Tripped Due to Steam Release Scram Dump Tank Hi Level Alarm Actuation During Repair Activities.Caused by Backflow Through Drain Paths.Drain Line Repaired ‎ (← links)
  • 05000155/LER-1985-008, :on 851114,during Shutdown for Maint,Upscale/ Downscale Reactor Protection Sys Actuated.Caused by Susceptibility of Picoammeters to Electrical Noise at Low Neutron Flux Levels ‎ (← links)
  • 05000155/LER-1997-003, :on 970128,demineralized Water Piping Discovered Susceptible to Overpressurization During Dba. Caused by Design Deficiency.Conducted Evaluation of Surge Protection for Piping & Procedures Revised ‎ (← links)
  • 05000155/LER-1996-012-01, :on 961004,92 Day TS Surveillance Requirement Inadvertently Surpassed.Caused by Human Error.Three Yr Review of T90-10 Analyses Conducted & All Analyses Found to Be Performed as Scheduled ‎ (← links)
  • 05000155/LER-1985-006-01, :on 850713,partial Loss of Offsite Communications Occurred.Caused by Michigan Bell Erroneously Cutting Toll Cable.Communication Svc Returned in 3 H & 22 Minutes ‎ (← links)
  • 05000155/LER-1997-001, :on 970102,containment Sphere Integrated Leakage Rate Test Was Not Performed IAW App J to 10CFR50. Caused Because TV-02 Did Not Provide Adequate Guidance for Control of Test.Blind Flange Was Removed ‎ (← links)
  • 05000155/LER-1996-011-01, :on 960926,TS Surveillance Requirement Inadvertently Surpassed.Caused by Inadequate Procedure. Start-up Procedure 0-TGS-1, Master Checklist Immediately Revised ‎ (← links)
  • 05000155/LER-1985-007-02, :on 850925,fuel Moves Performed in Spent Fuel Pool Following Containment Isolation Valve CV-4103 Return to Svc W/O Testing.Caused by Inadequate Procedures Re Local Leak Tests Following Maint ‎ (← links)
  • 05000155/LER-1996-013-01, :on 961207,automatic Reactor Scram Initiated by Turbine Trip Occurred.Caused by Failed Resistor within Associated Logic Circuit.Amplidyne Voltage Regulator Resistor Was Replaced ‎ (← links)
  • 05000155/LER-1996-003-01, :on 960118,RDS B Train Were Found Inoperable During Refueling Outage Surveillance Testing.Caused by Mechanical Binding.Disc & Seat Cleaned & Remaining Kerotest Valves Inspected ‎ (← links)
  • 05000155/LER-1985-005-01, :on 850531,constant Support Hanger in Reactor Depressurization Sys Determined to Be Improperly Tensioned. Caused by Insufficient Travel Length Allowed by Hanger SH-102.Hanger Replaced ‎ (← links)
  • 05000155/LER-1996-010-01, :on 960916,automatic Reactor Scram Occurred During Startup Due to High Reactor Pressure.Fabrication Process Will Be Evaluated & Corrected ‎ (← links)
  • 05000155/LER-1993-001, :on 930111,discovered That Dose Rates on Vacuum Filter Unit on Reactor Deck Measured Above Limits & Area Not Posted as High Radiation Area.Area Immediately Barricaded Using Rope & Status Sheet Updated ‎ (← links)
  • 05000155/LER-1992-014-01, :on 921029,facility Experienced Momentary Interruption of Station Power When Main Transformer Relay Opened.Caused by Loose Connection in Current Transformer. Terminal Block Repaired & Tested ‎ (← links)
  • 05000155/LER-1992-016-01, :on 921212,discovered That Temporary Change/ Rev Made to Master Checklist on 920604 Failed to Incorporate Rev in Jul 1992.On 921215 & 930106,temporary Changes Made W/O Proper Process.Temporary Changes Reviewed ‎ (← links)
  • 05000155/LER-1985-004, :on 850525,while Shutdown for Repairs,Spurious Upscale/Downscale Reactor Protection Sys Isolation Occurred. No Control Rod Movement Occurred.Caused by Electrical Noise ‎ (← links)
  • 05000155/LER-1992-015-01, :on 921210,radioactive Gaseous Effluent Monitor Sampler Flow Rate Monitor Failed Due to Failure to Perform Surveillance Test Required by TS 13.1.1.Caused by Personnel Error.Monitor Will Be Repaired,Recalibrated & Installed ‎ (← links)
  • 05000155/LER-1985-004-01, :on 850525,while Plant Shut Down for Short Outage,Upscale/Downscale Reactor Protection Sys Actuation Occurred.Caused by Electrical Noise at Low Neutron Flux Levels.No Control Rod Movement Occurred ‎ (← links)
  • 05000155/LER-1982-021-03, /03L-0:on 820707,both Open & Closed Position Indication Lights Remained on When Backup Core Spray Valve M07071 Returned to Normal Closed Position.Caused by Misaligned Open Position Switch.Switch Adjusted ‎ (← links)
  • 05000155/LER-1990-006-01, :on 901024,surveillance Testing Results Showed That Two Primary Safety Relief Valves Had High as-found Setpoints ‎ (← links)
  • 05000155/LER-1990-005-01, :on 900803,motor-operated Valve Failed to Open Resulting in Plant Shutdown.Caused by Increased Torque Requirement While Testing Valve Under High Differential Pressure Condition.Evaluation Continuing ‎ (← links)
  • 05000155/LER-1990-004-01, :on 900728,discrepancy Identified in Control Panel Wiring for Emergency Diesel Generator.Caused by Personnel Error in Wiring Relay & Inadequate Test Procedure. Cabinet Wiring Verification Completed ‎ (← links)
  • 05000155/LER-1990-003-01, :on 900722,plant Shutdown Initiated Due to Defect in Reactor Coolant Boundary in Reactor Cleanup Sys. Caused by Sensitization of Pipe Matl Due to Overlapping Heat Zones.Spec Change Implemented ‎ (← links)
  • 05000155/LER-1993-009-01, :on 930916,four Containment Spray Check Valves Discovered to Have Been Omitted from IST Program During Routine NRC Insp.Caused by Human Error.Four Check Valves Immediately Added to IST Program ‎ (← links)
  • 05000155/LER-1982-022-03, /03L-0:on 820702,during post-implementation Review of Recent Facility Change,One Pair of Flanges in 8-inch Fire Sys Piping Did Not Meet Facing Requirements.Caused by Engineer Error,To Be Corrected at Outage ‎ (← links)
  • 05000155/LER-1993-011-01, :on 931102,redundant Core Spray Valve Inadvertently Removed from Svc for Approx 12 Minutes, Rendering Redundant Core Spray Sys Inoperable.Caused by Human Error.Corrective Action Being Formulated ‎ (← links)
  • 05000155/LER-1982-020-03, /03L-0:on 820622,reactor Depressurizing Sys Isolation Valves on Two of Four Loops Not Returned to Operable Status.Caused by Slide Links Inadvertently Left Open,Due to Operator Error ‎ (← links)
  • 05000155/LER-1993-010-02, :on 931021,TS Violation Occurred Due to Operator Requalification Training Not Performed in Accordance W/Facility Ts.Evaluation Conducted ‎ (← links)
  • 05000155/LER-1982-019-03, /03L-0:on 820618,emergency Diesel Generator Failed to Start During Routine Test Scheduled for Every Third Day. Caused by Dirty Contacts on Starting Circuit Control Relays. Relays Cleaned ‎ (← links)
  • 05000155/LER-1993-010-01, :on 931021,several Licensed Operators Did Not Receive All Required Requalification Training During 1991-92 Training Cycle.Caused by Human Error.Training Action Plan Developed for Missed 1991-92 Training ‎ (← links)
  • 05000155/LER-1993-008, :on 930813,two Welds Discovered to Have Been Omitted from ISI Program Due to Use of Incomplete Vendor Manual Drawings.Comprehensive Review of C-E Fabrication Drawings Will Be Performed ‎ (← links)
  • 05000155/LER-1993-007, :on 930803,electric Fire Pumps Started During Surveillance Test as Result of Spurious Signal Generated When Technician Tried to Reseat Module Board to Get Test Light to Drop Out.Pump Shut Down ‎ (← links)
  • 05000155/LER-1993-005, :on 930714,discovered That Primary Containment Spray Motor Operator Capability May Have Been Insufficient to Open MOV-7064 Under Degraded Conditions.Torque Switch Will Be Reset & Votes Testing Performed ‎ (← links)
  • 05000155/LER-1993-006, :on 930715,high Radiation Area (HRA) Found Unposted & Not Barricade During Managers Shutdown/Refueling Hr Due to Insufficient Degree of Attention by Contracted HP Technician.Boundary Chain W/Hra Sign Attached ‎ (← links)
  • 05000155/LER-1982-018-01, /01T-0:on 820525,following Water Loss in Open Tank for Reactor Bldg Heating & Cooling Sys,Testing Revealed Tube Leakage in B Heating & Cooling Sys Heat Exchanger.Caused by Corrosion.Evaluation of Fluid Characteristics Planne ‎ (← links)
  • 05000155/LER-1982-013-01, /01T-0:on 820328,during Drainage of Primary Sys Water Level,Steam Drum Level Indication Failed to Register Proper Water Level.Caused by Inadequate Procedure Re Filling Level Transmitter Ref Lines.Procedures Will Be Revised ‎ (← links)
  • 05000155/LER-1982-013, Forwards LER 82-013/01T-0 ‎ (← links)
  • 05000155/LER-1982-014-03, /03L-0:on 820422,chemical Waste Tank Recycle Line Leak Discovered.Spillage Contained in Radwaste Collection Sys.Caused by long-term Corrosion & Excessive Acid Use During 820422 Makeup Regeneration ‎ (← links)
  • 05000155/LER-1982-014, Forwards LER 82-014/03L-0 ‎ (← links)
  • 05000155/LER-1982-012-03, /03L-0:on 820402,backup Compressed Gas Supply for Valves in One Loop of Containment Vacuum Relief Sys Failed to Maintain Adequate Pressure When Air Instrument Sys Was Vented.Caused by Unreliable Seating Characteristics ‎ (← links)
  • 05000155/LER-1982-012, Forwards LER 82-012/03L-0 ‎ (← links)
  • 05000155/LER-1982-009-03, /03L-0:on 820303,snubber PS-115B Judged Inoperable Due to Acceleration Test Failure.Exact Cause of Failure Not Known.Snubber Replaced ‎ (← links)
  • 05000155/LER-1982-008-03, /03L-0:on 820309,during Routine Testing of Actuation Time Delays Units in Reactor Depressurization Sys Input Channels,Timing for Two of Four Channels Exceeded Tech Specs.Caused by Electronic Drift.Units Adjusted ‎ (← links)
  • 05000155/LER-1982-009, Forwards LER 82-009/03L-0 ‎ (← links)
  • 05000155/LER-1982-008, Forwards LER 82-008/03L-0 ‎ (← links)
  • 05000155/LER-1982-007-03, /03L-0:on 820302,test Method for Conducting Component Type C Valve Leak Rate Tests for Three of 2-inch Process Lines Through Containment Found to Be Inadequate. Caused by Oversight in Development of Test Method in 1977 ‎ (← links)
  • 05000155/LER-1982-007, Forwards LER 82-007/03L-0 ‎ (← links)
  • 05000155/LER-1982-010-01, /01T-0:on 820318,during Type C Component Leak Rate tests,10-inch Feedwater Containment Check Valve Vfw 304 Exhibited Excessive Leakage.Caused by Iron Oxide Scale Deposit on Valve Seat.Seat Cleaned & Disc Replaced ‎ (← links)
  • 05000155/LER-1982-010, Forwards LER 82-010/01T-0 ‎ (← links)
  • 05000155/LER-1982-006-03, /03L-0:on 820224,reactor Cleanup Sys Resin Sluice Valve CV4093 Leaked in Excess of Tech Spec 3.7(b) Requirements.Cause Not Determined.Valve Seat Replaced.Valve Supplied by Worcestor Model 446 ‎ (← links)
  • 05000155/LER-1982-006, Forwards LER 82-006/03L-0 ‎ (← links)
  • 05000155/LER-1993-003-01, :on 930708,reactor Containment High Pressure Sensors Found out-of-TS Tolerance Due to Increase in Temp. Static-O-Ring Representative Recommended That Housing Vent Plug Be Removed & Switches Recalibr.Action Completed ‎ (← links)
  • 05000155/LER-1993-004-01, :on 930709,RWL & Primary Sys Pressure Found out-of-TS Tolerence.Caused by Diaphragm/Spring Failure & Leaking Sensing Line Valve Respectively.Low Rwl Sensor LS-RE09G Recalibr within TS Required Range ‎ (← links)
  • 05000155/LER-1993-002-01, :on 930629,discovered That Containment Integrity Breached Between 930627-29.Caused by Less than Adequate Review of Switching & Tagging Order.Drain Valve VFW-185 Closed ‎ (← links)
  • 05000155/LER-1990-002-01, :on 900420,Tech Spec Violation Occurred When Unqualified Technician Assigned to Shift Complement Did Not Have Two of on-the-job Training sign-offs Completed. Procedure Revised Re Coverage Qualification ‎ (← links)
  • 05000155/LER-1990-001-01, :on 900323,discovered That Proposed safety- Related Mod,Completed in Jul 1989,had Not Received PRC Review Prior to Implementation.Caused by Personnel Error. Incident Reviewed W/Engineering Staff ‎ (← links)
  • 05000155/LER-1982-005-03, /03L-0:on 820219,during Cold Shutdown,Leak Occurred at Threaded Fitting to Suction Side Relief Valve of Control Rod Drive Pump 1.Caused by Pipe Crack as Result of Fatigue from Vibration in Displacement Pump Sys ‎ (← links)
  • 05000155/LER-1982-005, Forwards LER 82-005/03L-0 ‎ (← links)
  • 05000155/LER-1982-004-03, /03L-0:on 820210,trip Point for Low Level Trip Sensor Lt 3180 Found to Operate 2 Inches Below Setpoint. Cause of Calibr Drift Unknown.Unit Recalibr & Returned to Operable Status ‎ (← links)
  • 05000155/LER-1982-004, Forwards LER 82-004/03L-0 ‎ (← links)
  • 05000155/LER-1982-003-01, /01T-0:on 820128,investigation of Increased Water Collection in Reactor Containment Sump Revealed through-wall Leakage of 0.15 Gpm in Pipeway Air Cooler Unit B.Caused by Corrosion.Tubing Repaired & Unit Returned to Svc ‎ (← links)
  • 05000155/LER-1982-003, Forwards LER 82-003/01T-0 ‎ (← links)
  • 05000155/LER-1982-001-03, /03L-0:on 820111,during Quarterly Test of Reactor Depressurization Sys,Isolation Valve CV4180 Failed to Open, Making One Loop Inoperable.Caused by Valve Stem Seizure. Packing Lubricated & Valve Successfully Tested ‎ (← links)
  • 05000155/LER-1982-001, Forwards LER 82-001/03L-0 ‎ (← links)
  • 05000155/LER-1981-027-03, /03L-0:on 811230,after Unexplained Increase in Tank Level,Sample of Demineralized Tank Water Revealed Minor Radioactive Contamination of I-133.Water Pumped to Storage Tank.Investigation of Backflow Mechanisms Underway ‎ (← links)
  • 05000155/LER-1981-027, Forwards LER 81-027/03L-0 ‎ (← links)
  • 05000155/LER-1981-026-03, /03L-0:on 811207,radwaste Casing Vent Plug Failed & Approx 300 Gallons of Low Activity Radioactive Water Were Discharged in Pump Room.Caused by Deterioration of Pump Casing Due to long-term Corrosion & Erosion ‎ (← links)
  • 05000155/LER-1981-026, Forwards LER 81-026/03L-0 ‎ (← links)
  • 05000155/LER-1978-011-01, /01T-0:on 780217,during Equipment Review, Unqualified Scram Pilot Solenoid Valve NC-27B Was Found Installed in F2 Drive Scram Valve Sys.Pilot Solenoid Was de-energized & Exhaust Function Verified ‎ (← links)
  • 05000155/LER-1978-012-01, /01T-0:on 780217,during Equipment Review,Pilot Solenoid Valve SV-879 Was Deemed Inadequate to Perform in Postulated Accident Environ.Pilot Solenoid Is de-energized & Will Be Mainted in Safe Condition Until Mods Completed ‎ (← links)
  • 05000155/LER-1978-003-01, /01T-0:on 780120,during Routine Leak Rate Testing of Containment Ventilation Isolation Valves,Supply Valve CV-4097 Leaked in Excess of Tech Specs.Caused by Valve Disc Out of Alignment & Misadjusted Disc Ring ‎ (← links)
  • 05000155/LER-1978-028-03, /03L-0:on 780605,emergency Condenser Outlet Valve MO-7053 Deemed Automatically Inoperable in Closed Position After Manual Tightening of Valve to Stop Leakage.Cause of Leakage Unknown & Will Be Investigated at Future Shutdown ‎ (← links)
  • 05000155/LER-1978-005-03, /03L-0:on 780203,during Plant Startup,Proper Offgas Sample Monitor Flow Could Not Be Established Using Flow Control Valves in Sample Sys.Probably Caused by Inadequate Cleaning of Flow Instrument by Maint Personnel ‎ (← links)
  • 05000155/LER-1978-006-03, /03L-0:on 780208,following Abnormal Test Light Indication on Reactor Depressurization Sys Control Sys,One Loop of Sys Channel D Was Made Inoperable to Isolate Cause of Abnormal Indication.Cause Not Stated ‎ (← links)
  • 05000155/LER-1978-009-03, /03L-0:on 780215,following Abnormal Test Light Indication on Reactor Depressurization Sys Control Sys, Each of Four Depressurization Loops Was Made Inoperable to Isolate Cause of Indication.Cause Not Stated ‎ (← links)
  • 05000155/LER-1978-029-03, /03L-0:on 780606,daily Unidentified Primary Sys Leakage Exceeded Allowable Limits.Caused by Drive Flange O Ring Seal Deterioration.Degradation Will Be Investigated & Repaired During Future Outage ‎ (← links)
  • 05000155/LER-1978-026-03, /03L-0:on 780531,following Scram While Still in Power Operation,Condensate Storage Tank Dropped to 61% While Steam Drum Water Inventory Was Maintained by Manual Control. Caused by Personnel Oversight ‎ (← links)
  • 05000155/LER-1978-002-03, /03L-0:on 780119,during Monthly Specific Gravity Readings in Reactor Depressurization Sys Battery A,Cell 12 Read Lower than Tech Spec Limit.Caused by Loss of Electrolyte Through Sampling.Electrolyte Added ‎ (← links)
  • 05000155/LER-1978-002, Forwards LER 78-002/03L-0 ‎ (← links)
  • 05000155/LER-1991-010, :on 911215,two Out of Four Reactor Pressure Switches Were Found to Be out-of-tolerance High.Caused by Aging & Corrosion Experienced by Instrumentation.Switches Were Recalibrated in Accordance W/Plant Procedure ‎ (← links)
  • 05000155/LER-1991-010-01, Forwards LER 91-010-01,reactor Protection Sys Pressure Switches Experiencing Setpoint Drift.Util Considered Event Reportable to NRC Per 10CFR50.73(a)(2)(vi) as Potential Generic Problem ‎ (← links)
  • 05000155/LER-1981-025-03, /03L-0:on 811014,small through-wall Leak Noted in 1 1/2-inch Drain Line from Cation Tank.Apparently Caused by Corrosion at Welded Socket Type Fitting.Pipe Section & Two Elbow Fittings Replaced ‎ (← links)
  • 05000155/LER-1981-025, Forwards LER 81-025/03L-0 ‎ (← links)
  • 05000155/LER-1981-024-01, /01L-0:on 810930,during Investigation of Water Collection,Leakage Found in Pipeway Air Cooler.Caused by Corrosion at U-bends in Cooling Unit Coils.Solder Repairs Made.Evaluation Underway ‎ (← links)
  • 05000155/LER-1981-024, Forwards LER 81-024/01L-0 ‎ (← links)
  • 05000155/LER-1981-021-03, /03L-0:on 810915,during Specific Gravity Check, Cell 5 of Reactor Depressurizing Sys a Battery Had Reading Below Tech Spec.Cause Not Determined.Cell Replaced ‎ (← links)
  • 05000155/LER-1981-021, Forwards LER 81-021/03L-0 ‎ (← links)
  • 05000155/LER-1981-020-03, /03L-0:on 810906,during Recycle Operation, Reduction Observed in Chemical Waste Receiver Tank Level & Leak Found in 2-inch Recycle Line.Caused by long-term Corrosion.Piping Replaced ‎ (← links)
  • 05000155/LER-1981-020, Forwards LER 81-020/03L-0 ‎ (← links)
  • 05000155/LER-1981-023-01, /01T-0:on 810919,during Containment Isolation Valve Testing Discovered Reactor & Fuel Pit Drain Line Valves Cv 4027 & Cv 4117 Leaking.Caused by Worn Area on Valve Seat.Leak Test on 810924 Showed Addl Leakage ‎ (← links)
  • 05000155/LER-1981-023, Forwards LER 81-023/01T-0 ‎ (← links)
  • 05000155/LER-1978-017-03, /03L-0:on 780320,during Period of Reduced Power, Control Rod Drive F-2 Scram Pilot Valve Control Switch Was Reset from Tripped Position Contrary to Instructions.Cause Due to Vague Instructions.Procedures Under Review ‎ (← links)
  • 05000155/LER-1978-030-03, /03L-0:on 780712,channel B of Reactor Depressurization Sys Removed from Svc After Trouble Alarm When Battery for Loop Placed on Overcharge.Caused by Blown Fuse Due to Diode Failure in Annunciator Circuitry ‎ (← links)
  • 05000155/LER-1978-030, Forwards LER 78-030/03L-0 ‎ (← links)
  • 05000155/LER-1978-025-03, /03L-0:on 780525,electrolyte Level Found Below Top of Plates in Cells 1 & 6 of Diesel Fire Pump Battery Unit 1. Caused by Failure to Maintain Normal Electrolyte Levels. Personnel Instructed to Fill Opening Ring to Provide Ma ‎ (← links)
  • 05000155/LER-1978-025, Forwards LER 78-025/03L-0 ‎ (← links)
  • 05000155/LER-1978-001-03, /03L-0:on 780109,diesel Fire Pump Starting Time Exceeded Core Cooling Criteria.Caused by Cold Weather Conditions.Ventilation Louvers in Screen House Sealed to Reduce Heat Loss in Room.Item Added to Cold Weather Checks ‎ (← links)
  • 05000155/LER-1978-001, Forwards LER 78-001/03L-0 ‎ (← links)
  • 05000155/LER-1978-021-03, /03L-0:on 780415,during Reactor Power Operation, Reduced Capacity Operation of 138 Kv Offsite Power Source Occured.Caused by Authorized Mods to Offsite Electrical Substation.No Corrective Action Required ‎ (← links)
  • 05000155/LER-1978-022-03, /03L-0:on 780417,138 Kv Line Was de-energized Due to Switching Error.Caused by Deficient Procedure.Switching Procedure Review Requirements Modified by Offsite Personnel ‎ (← links)
  • 05000155/LER-1978-016-03, /03L-0:on 780320,daily Primary Leakage Exceeded Allowable Limit.Cause Not Stated.Excess Leakage Classified as Identified.Flange O Rings Will Be Replaced During Future Outage ‎ (← links)
  • 05000155/LER-1978-023-03, /03L-0:on 780504,during Routine Weekly Checks of Fire Pump Diesel Starting Battery a Electrolyte Level Found Below Top of Plates in Cells 1,3 & 5 of Battery Unit 1.Cause Unknown.Battery Unit 2 Replaced on 780516 ‎ (← links)
  • 05000155/LER-1978-023, Forwards LER 78-023/03L-0 ‎ (← links)
  • 05000155/LER-1978-020-03, /03L-0:on 780411,during Power Operation,Off Gas Monitor Sample Flow Was Low & Radiation Monitoring Sys Deemed Inoperable.Caused by Foreign Deposits on Needle Valve Sample Flow Control.Valves Will Be Cleaned Regularly ‎ (← links)
  • 05000155/LER-1978-018-03, /03L-0:on 780406,one of Two Low Drum Scram Sensors in Each of Two Reactor Protection Channels Failed to Operate.Caused by Binding of Switch/Pointer Mechanism on Scale Plate Inside Cover.New Cover & Scale Plate Installed ‎ (← links)
  • 05000155/LER-1978-014-03, /03L-0:on 780311,operator Observed Test Enable Light Indication on Actuation Channel a of Reactor Depressurization Sys.Caused by Defective Electronic Module in Sensor Channel D.Module Repair in Progress ‎ (← links)
  • 05000155/LER-1978-004-03, /03L-0:on 780202,emergency Diesel Generator Overall Response Time Exceeded Required Starting Time of 13.9-s.Cause Undetermined.Maint Personnel Continuing Observation of Starting Characteristics ‎ (← links)
  • 05000155/LER-1978-019-03, /03L-0:on 780406,during Investigation of Anomalies Re Load Rejection & Scram from Reduced Condenser Vacuum, Switch PS652 Was Found Out of Tolerance.Caused by Minor Drift.Switch Recalib & Tested ‎ (← links)
  • 05000155/LER-1978-013-03, /03L-0:on 780309,following Abnormal Indication on Automatic Test Circuit for Reactor Depressurizing Sys, Channel D Actuation Cabinet Removed from Svc to Facilitate Trouble Shooting ‎ (← links)
  • 05000155/LER-1978-003, Forwards LER 78-003/01T-0 ‎ (← links)
  • 05000155/LER-1978-015-32, /03L-0:on 780223,potentially Submerged Electrical Circuitry for Reactor Containment Water Level Indication Was Deemed Marginal by Evaluation.Caused by Original Const.Cable Splicing Retaped W/Waterproof Rubber Tape ‎ (← links)
  • 05000155/LER-1978-015, Forwards LER 78-015/03L-0 ‎ (← links)
  • 05000155/LER-1981-019-03, /03L-0:on 810831,specific Gravity of Station Battery Cell 43 Found to Be Below Specs.Caused by Crack in Cell Case Allowing Leakage of Electrolyte & Replacement by Water.Cell Replaced & Other Cells Checked for Cracks ‎ (← links)
  • 05000155/LER-1981-019, Forwards LER 81-019/03L-0 ‎ (← links)
  • 05000155/LER-1981-015-03, /03L-0:on 810813,pressure Sensor for Automatic Start of Diesel on Low Fire Sys Header Pressure Found Inadvertently Valved Closed for Excessive Period.Caused by Operator Error.Valve Restored & Procedures re-emphasized ‎ (← links)
  • 05000155/LER-1981-015, Forwards LER 81-015/03L-0 ‎ (← links)
  • 05000155/LER-1981-018-03, /03L-0:on 810822,leaking Solenoid Valve Discovered in Twin Offgas Monitors Used to Supply Purging Air to Sys. Caused by Worn Parts in Asco(Model 8320A88) three-way Solenoid Valve.Parts Replaced & Periodic Maint Scheduled ‎ (← links)
  • 05000155/LER-1981-018, Forwards LER 81-018/03L-0 ‎ (← links)
  • 05000155/LER-1981-017-03, /03L-0:on 810815,pilot Cell of Channel a Battery Supply for Reactor Depressurizing Sys Found to Have Electrolyte Level Above High Level Mark.Probably Caused by Inadvertent Overfilling of Cell.Electrolyte Level Reduced ‎ (← links)
  • 05000155/LER-1981-017, Forwards LER 81-017/03L-0 ‎ (← links)
  • 05000155/LER-1991-001, :on 910110,voids in Foam Found in Seals.Caused by Incomplete Filling of Seal Cavity During Installation Process.Insp & Repairs Ongoing & Fire Patrols in Effect Until Insps & Repairs Complete ‎ (← links)
  • 05000155/LER-1991-002-01, :on 900830,oversized Holes in Channel Support Tube Orifice Plate Not within Tech Spec.Cause Unknown. Vendor Contacted & Informed of Nonconforming Condition ‎ (← links)
  • 05000155/LER-1982-033-03, /03L-0:on 821130,review Revealed That Previous Issue of Room Temp Vulcanizing Fire Barrier Matl Included Matl Exceeding Vendor Recommended Shelf Life.Caused by Personnel Error.Personnel Counseled ‎ (← links)
  • 05000155/LER-1982-033, Forwards LER 82-033/03L-0 ‎ (← links)
  • 05000155/LER-1982-024-03, /03L-0:on 820811,120-s Initiation Timer for One of Four Sensor Channels Failed to Trip During Monthly Reactor Depressurization Sys Testing.Caused by Defect in Timer Operation Due to Failure of Integrated Circuit Unit ‎ (← links)
  • 05000155/LER-1982-024, Forwards LER 82-024/03L-0 ‎ (← links)
  • 05000155/LER-1983-002-03, /03L-0:on 830523,during Routine Calibr of Low Level Trip Sensor Lt 3181,for Reactor Depressurization Sys, Trip Found to Operate Below Tech Spec Setpoint.Cause Not Determined.Transmitter Adjusted ‎ (← links)
  • 05000155/LER-1981-022-01, /01T-0:on 810917,during Preparation for Removal of One Reactor Depressurizing Loop from Svc,Error in Performing Written Switching Order Resulted in Inoperability of Two Loops.Second Loop Restored to Svc.Procedure Reviewed ‎ (← links)
  • 05000155/LER-1981-022, Forwards LER 81-022/01T-0 ‎ (← links)
  • 05000155/LER-1981-016-01, /01T-0:on 810813,discovered That Actions to Mitigate Potential for Pressurization of Reactor Containment from Instrument & Svc Air Sources Not Incorporated Into Plant Procedures ‎ (← links)
  • 05000155/LER-1981-016, Forwards LER 81-016/01T-0 ‎ (← links)
  • 05000155/LER-1981-014-03, /03L-0:on 810728,both Emergency Condenser Radiation Monitors Were Removed from Svc During Repairs to Power Supply Component.Caused by Possibility of Shock & Fire Hazard.Monitors Returned to Svc within 15 Minutes ‎ (← links)
  • 05000155/LER-1981-014, Forwards LER 81-014/03L-0 ‎ (← links)
  • 05000155/LER-1981-013-03, /03L-0:on 810617,reactor Depressurization Sys Loop B Was Removed from Svc to Check Inverter Power Supply.Caused by Defective Electronic Components in non-essential Synchronizing Circuit.Components Will Be Replaced ‎ (← links)
  • 05000155/LER-1981-013, Forwards LER 81-013/03L-0 ‎ (← links)
  • 05000155/LER-1981-012-03, /03L-0:on 810615,special Timing Test Revealed Closure Time of Valve CV4095 to Be Between 8 & 11-s,above Tech Spec Limit of 6-s.Exact Cause Not Determined.Valves Replaced W/Valves Having Increased Exhaust Capability ‎ (← links)
  • 05000155/LER-1981-011-03, /03L-0:on 810612,vacuum Relief Capability for Containment Bldg Exhaust Loop Was Inoperable on 810612,16 & 18.Cause Not Stated ‎ (← links)
  • 05000155/LER-1981-010-03, /03L-0:on 810516,check Valve CV4094 Closing Time Exceeded Tech Specs Limit.Cause Unknown.Investigation Will Be Made During Future Outage.Valve Operating Cylinder & External Linkage Hinge Points Lubricated & Retested ‎ (← links)
  • 05000155/LER-1981-010, Forwards LER 81-010/03L-0 ‎ (← links)
  • 05000155/LER-1989-009-01, :on 891027 & 31,turbine Bypass Valve Would Not Open When Given Open Signal.Caused by Characteristics of Garlock Style 938 Which Hardens When Subj to Heat & Pressure.Valves Repacked Using Carbon Spacers ‎ (← links)
  • 05000155/LER-1981-009-03, /03L-0:on 810507,during Power Operations,Alarm Indicated Abnormal Temp on Reactor Vessel Level Sensing Chambers.Caused by Failed Capacitor in Temp Control Circuitry of Temp Switch Unit.Capacitor Replaced ‎ (← links)
  • 05000155/LER-1981-009, Forwards LER 81-009/03L-0 ‎ (← links)
  • 05000155/LER-1981-001-03, /03L-0:on 810102,during Specific Gravity Checks, Cell 56 of Reactor Depressurizing Sys Battery for Channel D Had Reading Below 1.200 & Failed to Respond Adequately to Equalizing Charge.Cause Not Known.Cell Replaced on 810108 ‎ (← links)
  • 05000155/LER-1981-001, Forwards LER 81-001/03L-0 ‎ (← links)
  • 05000155/LER-1981-006-03, /03L-0:on 810407,control Unit Indicator for One of Two Reactor Containment Vacuum Relief Loops Presented Inadequate Pressure Display.Caused by Removal of Control Unit Pis 187 for Maint Due to Defective Neon Lamp Element ‎ (← links)
  • 05000155/LER-1981-006, Forwards LER 81-006/03L-0 ‎ (← links)
  • 05000155/LER-1981-004-03, /03L-0:on 810315,leak in Chemical Waste Receiver Tank Discharge Pipe Observed.Cause Possibly Due to long-term Corrosion in Elbow of 3-inch Pipe.Elbow & Short Sections of Piping Replaced ‎ (← links)
  • 05000155/LER-1981-004, Forwards LER 81-004/03L-0 ‎ (← links)
  • 05000155/LER-1980-044-03, Output Voltage Regulator Failed & Circuit Breakers to Personnel & Equipment Locks & Lighting Transformer Tripped.Caused by Open Connection to Excitation Buildup Relay Coil Due to Aging & Vibration ‎ (← links)
  • 05000155/LER-1980-044, Forwards Updated LER 80-044/03X-1 ‎ (← links)
  • 05000155/LER-1980-046-03, /03L-0:on 801211,during Specfic Gravity checks,21 of 60 Cell Batteries for Reactor Depressurizing Channel a Found Below Required Specific Gravity.Caused by Inadequate Cleaning & Reconnecting of Cell Terminals ‎ (← links)
  • 05000155/LER-1980-046, Forwards LER 80-046/03L-0 ‎ (← links)
  • 05000155/LER-1980-045-03, /03L-0:on 801210,check Valve Vrd 310 in Common Control Rod Drive 2-inch Suction Line Leaked in Excess of Acceptable Criteria.Caused by Slight Imperfections in Valve Disc Due to Fabrication Flaws ‎ (← links)
  • 05000155/LER-1980-045, Forwards LER 80-045/03L-0 ‎ (← links)
  • 05000155/LER-1980-029-03, /03L-0:on 800911,during Monthly Gravity Checks, Cell 12 of Reactor Depressurizing Battery for Channel D Had Low Reading of 1.171.Cause Unknown.Cell Replaced 800917 ‎ (← links)
  • 05000155/LER-1980-028-03, /03L-0:on 800909,following Automatic Test Circuit Alarms,Sensor Channel D Removed from Svc to Vent Reactor Water Level Transmitter LT3183.Tech Spec Change Request Submitted 800825 to Provide Greater Margin in Trip Setpoint ‎ (← links)
  • 05000155/LER-1981-008-03, /03L-0:on 810420,starting Time for Emergency Diesel Generator Exceeded Procedure Criteria.Caused by Five of Six Injectors Not Producing Fine Spray Pattern.Injectors Replaced ‎ (← links)
  • 05000155/LER-1981-008, Forwards LER 81-008/03L-0 ‎ (← links)
  • 05000155/LER-1981-007-03, /03L-0:on 810414,starting Time for Emergency Diesel Generator Did Not Meet Procedure Criteria.Cause Undetermined.Subsequent Testing Was Satisfactory ‎ (← links)
  • 05000155/LER-1981-007, Forwards LER 81-007/03L-0 ‎ (← links)
  • 05000155/LER-1979-019-03, /03L-0 on 790418:following Scram & During Routine Primary Sys Leak Rate Testing,Unidentified Leakage Observed at 1.86 Gpm.Apparent Cause Was Cooling Water Temp Transients ‎ (← links)
  • 05000155/LER-1981-005-03, /03L-0:on 810321,emergency Diesel Generator Starting Time Did Not Meet Criteria.Cause Unknown.Tech Spec Mod Requested on 800205 to Allow Relaxation of Time ‎ (← links)
  • 05000155/LER-1981-005, Forwards LER 81-005/03L-0 ‎ (← links)
  • 05000155/LER-1980-035-03, /03X-1:on 801024,during Transfer of Resins from Anion Tank to Reactor Cleanup Demineralizer,Water Leaked from Tank.Caused by Crack in External Lead Shield on Tank. Item Is Not Reportable Based on Tech Specs ‎ (← links)
  • 05000155/LER-1980-035, Forwards Updated LER 80-035/03X-1 ‎ (← links)
  • 05000155/LER-1980-041-03, /03L-0:on 801123,during Containment Type C Component Leak Rate Tests,Reactor Cleanup Sys Resin Sluice Valves CV4092 & CV4093 Exhibited Excessive Leakage.Caused by Minor Wear on Seat of Each Valve.Ball Disc & Seats Replaced ‎ (← links)
  • 05000155/LER-1980-041, Forwards LER 80-041/03L-0 ‎ (← links)
  • 05000155/LER-1980-038-03, /03L-0:on 801118,10-inch Feedwater Check Valve Vfw 304 Exhibited Leakage.Caused by Dirt & Scale on Valve Seat & Disc.Disc Machined & Seat Lapped.Valve Tested ‎ (← links)
  • 05000155/LER-1980-037-03, /03L-0:on 801118,engine Cooling Water Pump Coupling Components Overheated.Caused by Coupling Sleeve Wearing on Bearing Seal of Reduction Gear Unit Due to Loose Set Screw.Unit Repaired ‎ (← links)
  • 05000155/LER-1980-036-03, /03L-0:on 801118,output Voltage Did Not Reach Normal 480-volt Level.Probably Caused by Damage to Two Diodes (Type IN-1190) During Annual Maint Checks.Diodes Replaced & Annual Checks Eliminated ‎ (← links)
  • 05000155/LER-1980-034-01, /01T-0:on 801101,during Routine Shutdown Operations,Main Steam Isolation Valve M07050 Failed to Close on Remote Manual Initiation.Caused by Hardened Packing Matl on Valve Stem.Other Packing Techniques Are Being Considered ‎ (← links)
  • 05000155/LER-1980-034, Forwards LER 80-034/01T-0 ‎ (← links)
  • 05000155/LER-1980-023-01, /01T-0:on 800812,review of Reactor Containment Design for Steam Line Breaks in Primary Sys Indicated That Containment Atmosphere Temp Can Exceed Temp Criteria Previously Used.Operating Instructions Revised ‎ (← links)
  • 05000155/LER-1980-023, Forwards LER 80-023/01T-0 ‎ (← links)
  • 05000155/LER-1980-020-03, /03L-0:on 800718,during Weekly Checks of Pilot Cell of Reactor Depressurizing Sys Battery for Channel C, Voltage Anomaly Revealed Defective Three Unit Cell.Caused by Increase in Internal Resistance of Cell Unit 9 ‎ (← links)
  • 05000155/LER-1980-020, Forwards LER 80-020/03L-0 ‎ (← links)
  • 05000155/LER-1980-042-01, /01T-0:on 801206,wall Leakage Observed During Inservice Insp Activity at Weld in two-inch Pipe in Excess Flow Return from Control Rod Drive Sys.Probable Cause Related to Marginal Const.Repairs Will Be Made ‎ (← links)
  • 05000155/LER-1980-042, Forwards LER 80-042/01T-0 ‎ (← links)
  • 05000155/LER-1981-003-03, /03L-0:on 810128,backup Nitrogen Bottle Supply for Containment Vacuum Relief Valve Control Sys Depressurized. Caused by Fractured Bottle Isolation Valve Body Probably Due to Overtightening Bonnet Mounting Nut.Valve Replaced ‎ (← links)
  • 05000155/LER-1981-003, Forwards LER 81-003/03L-0 ‎ (← links)
  • 05000155/LER-1980-049-03, /03L-0:on 801230,during Routine Calibr of Containment Bldg Level,Transmitter Indicated 587 1/2 Ft Level W/Actual Level 590 Ft.Cause of Deficiency in Barton Model 386 Transmitter Not Determined.Transmitter Recalibr ‎ (← links)
  • 05000155/LER-1980-049, Forwards LER 80-049/03L-0 ‎ (← links)
  • 05000155/LER-1981-002-01, /01T-0:on 810112,discovered Potential for Overpressurization of Control Rod Drive Water Supply Sys Suction Line Piping.Caused by Addition of Check Valve VRD-310.Design Changes Will Be Made ‎ (← links)
  • 05000155/LER-1981-002, Forwards LER 81-002/01T-0 ‎ (← links)
  • 05000155/LER-1980-050-03, /03L-0:on 801223,monthly Tests for Dc Batteries Found Overdue.Caused by Inadequate Administrative Controls & Personnel Error.Maint Dept Daily Working Schedule Form Revised to Include Surveillance of Test Status Board ‎ (← links)
  • 05000155/LER-1980-050, Forwards LER 80-050/03L-0 ‎ (← links)
  • 05000155/LER-1980-047-03, /03L-0:on 801217,generator Output Voltage Failed to Build Up During Test Start of Emergency Diesel Generator. Caused by Broken Pins in plug-in Socket of Relay Socket in Regulation Board.Stronger Socket Installed ‎ (← links)
  • 05000155/LER-1980-047, Forwards LER 80-047/03L-0 ‎ (← links)
  • 05000155/LER-1980-048-01, /01T-0:on 801219,150 Splices & Five Terminal Block Defects Were Found.Caused by Installation of Faulty Equipment in Original Const.Splices & Blocks Repaired or Replaced ‎ (← links)
  • 05000155/LER-1980-048, Forwards LER 80-048/01T-0 ‎ (← links)
  • 05000155/LER-1980-040-03, /03L-0:on 801202,diesel Fire Pump Unit Did Not Produce Full Discharge Pressure Output Until After Starting Time Acceptance Criteria.Cause Undetermined.Engine Jacket Heater Thermostat Control Setting Increased ‎ (← links)
  • 05000155/LER-1980-040, Forwards LER 80-040/03L-0 ‎ (← links)
  • 05000155/LER-1980-039-03, /03L-0:on 801127,check Valve Inside Containment in 3-inch Treated Waste Line Found Leaking in Excess of Test Criteria.Caused by Excessive Wear on Disc Pin of Tilting Disc Check Valve.Seat & Disc Components Replaced ‎ (← links)
  • 05000155/LER-1980-039, Forwards LER 80-039/03L-0 ‎ (← links)
  • 05000155/LER-1980-043-01, /01T-0:on 801212,crack Measuring 1/2-inch Found in Base Metal of 3-inch Line at 1/2-inch Branch Connection. Probably Caused by Stress Corrosion.Defective Parts Replaced ‎ (← links)
  • 05000155/LER-1980-043, Forwards LER 80-043/01T-0 ‎ (← links)
  • 05000155/LER-1980-033-01, /01T-0:on 801003,investigation of 800927 Minor Leak in Reactor Cleanup Demineralizer Sys Established Event Reportability.Caused by Bearing Failure of Canned Rotor Pump ‎ (← links)
  • 05000155/LER-1980-032-03, /03L-0:on 800917,following Intermittent Automatic Test Circuit Alarms,Sensor Channel D of Reactor Depressurizing Sys Was Removed to Vent Reactor Water Level Transmitter LT3183.Caused by Conservative Calibr Shift ‎ (← links)
  • 05000155/LER-1980-031-03, /03L-0:on 800923,reactor Level Transmitter LT3183 on Reactor Depressurization Sys Was Returned to Svc W/Trip Setpoint Lower than Required.Caused by Equipment Defect. Revised Setpoints Implemented ‎ (← links)
  • 05000155/LER-1980-031, Forwards LER 80-031/03L-0 ‎ (← links)
  • 05000155/LER-1980-030-03, /03L-0:on 800919,minor Seat Leakage Discovered in Containment Isolation Valve CV4027.Caused Not Determined. Valve Seat Scheduled for Replacement Due to Previous Indication of Wear ‎ (← links)
  • 05000155/LER-1980-030, Forwards LER 80-030/03L-0 ‎ (← links)
  • 05000155/LER-1980-027-03, /03L-0:on 800814,after Periodicautomatic Test Circuit Alarms,Reactor Depressurizing Sys Sensor Channel D Was Removed from Svc to Vent Reactor Water Level Transmitter LT3183.Caused by Minor Calibr Shift in Transmitter ‎ (← links)
  • 05000155/LER-1980-026-03, /03L-0:on 800820,after Periodic Automatic Test Circuit Alarms, Reactor Depressurizing Sys Sensor Channel D Was Removed from Svc to Vent Reactor Water Level Transmitter LT3183.Caused by Minor Calibr Shift in Transmitter ‎ (← links)
  • 05000155/LER-1980-025-03, /03L-0:on 800819,after Periodic Automatic Test Circuit Alarms,Reactor Depressurizing Sys Sensor Channel D Was Removed from Svc to Vent Reactor Water Level Transmitter LT3183.Caused by Minor Calibr Shift in Transmitter ‎ (← links)
  • 05000155/LER-1980-024-03, /03L-0:on 800814,after Periodic Automatic Test Circuit Alarms,Reactor Depressurizing Sys Sensor Channel D Was Removed from Svc to Vent Reactor Water Level Transmitter LT3183.Caused by Minor Calibr Shift in Transmitter ‎ (← links)
  • 05000155/LER-1980-021-03, /03L-0:on 800729,following Intermittent Automatic Test Circuit Alarms,Sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Vent Level Transmitter LT3183.Caused by Minor Calibr Shift ‎ (← links)
  • 05000155/LER-1980-021, Forwards LER 80-021/03L-0 ‎ (← links)
  • 05000155/LER-1980-019-03, /03L-0:on 800713,visual Alarm Noted on Containment Pressure Indicator on Unit Pis 173 in Control Room.Cause Not Repetitive.Investigation Revealed Defective Electronic Components in Unit ‎ (← links)
  • 05000155/LER-1980-019, Forwards LER 80-019/03L-0 ‎ (← links)
  • 05000155/LER-1980-018-03, /03L-0:on 800710,during Gravity Check,Cells 35 & 54 of Battery Power Supply for Reactor Depressurizing Sys Channel C Found Below Tech Spec Values.Cause Unknown.Cells Failed to Respond to Charge & Channel Removed from Svc ‎ (← links)
  • 05000155/LER-1980-018, Forwards LER 80-018/03L-0 ‎ (← links)
  • 05000155/LER-1980-017-03, /03L-0:on 800703,following Intermittent Automatic Test Circuit Alarms,Setpoint Drift in Conservative Direction Found on Reactor Level Transmitter.Cause to Be Investigated. Readjusted Unit by Venting & Rezeroing Transmitter ‎ (← links)
  • 05000155/LER-1980-017, Forwards LER 80-017/03L-0 ‎ (← links)
  • 05000155/LER-1980-012-03, /03L-0:on 800507,intermittent Automatic Test Circuit Alarmed.Caused by Setpoint Drift in Conservative Direction on Reactor Level Transmitter.Unit Readjusted by Venting & Rezeroing Transmitter ‎ (← links)
  • 05000155/LER-1980-013-01, /01T-0:on 800509,design Review Indicated That Damage to Air Operator Mechanism Might Occur During Pressure Transient Associated W/Mca in Final Hazards Summary Rept.Caused by Inadequate Specs for Original Valves ‎ (← links)
  • 05000155/LER-1980-013, Forwards LER 80-013/01T-0 ‎ (← links)
  • 05000155/LER-1980-010-03, /03L-0:on 800423,intermittent Automatic Test Circuit Alarmed.Caused by Setpoint Drift in Conservative Direction on Reactor Level Transmitter.Unit Readjusted by Venting & Rezeroing Transmitter ‎ (← links)
  • 05000155/LER-1980-009-03, /03L-0:on 800415,6-month Leakage Tests for Equipment & Personnel Locks to Containment Bldg Completed 5 Days Later than Tech Specs Require.Caused by Incorrectly Logged Surveillance Test Status Board Info ‎ (← links)
  • 05000155/LER-1980-009, Forwards LER 80-009/03L-0 ‎ (← links)
  • 05000155/LER-1980-011-03, /03L-0:on 800501,during Monthly Gravity Checks, Cell 2 of Battery for Channel a of Reactor Depressurizing Sys Read Below Tech Specs.Cell Did Not Respond Adequately to Equalizing Charge.Cause of Failure Unknown.Cell Replaced ‎ (← links)
  • 05000155/LER-1980-011, Forwards LER 80-011/03L-0 ‎ (← links)
  • 05000155/LER-1980-016-03, /03L-0:on 800527,sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Correct Problem Following Intermittent Automatic Test Circuit Alarms.Caused by Setpoint Drfit.Unit Readjusted ‎ (← links)
  • 05000155/LER-1980-015-03, /03L-0:on 800515,sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Correct Problem Following Intermittent Automatic Test Circuit Alarms.Caused by Setpoint Drift.Unit Readjusted ‎ (← links)
  • 05000155/LER-1980-014-03, /03L-0:on 800512,sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Correct Problem Following Intermittent Automatic Test Circuit Alarms.Caused by Setpoint Drift.Unit Readjusted ‎ (← links)
  • 05000155/LER-1980-008-03, /03L-0:on 800411,following Intermittent Automatic Test Circuit Alarms,Sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Correct Problem. Caused by Drift.Unit Was Readjusted ‎ (← links)
  • 05000155/LER-1980-006-03, /03L-0:on 800403,following Intermittent Automatic Test Circuit Alarms,Sensor Channel D of Reactor Depressurizing Sys Was Removed from Svc to Correct Problem. Caused by Setpoint Drift.Unit Was Readjusted ‎ (← links)
  • 05000155/LER-1980-005-03, /03L-0:on 800301,following Several Intermittent Automatic Test Circuit Alarms,Sensor Channel D of Reactor Depressurizing Sys Removed from Svc.Caused by Setpoint Drift on Transmitter LT-3183.Transmitter Vented & Returned to S ‎ (← links)
  • 05000155/LER-1980-005, Forwards LER 80-005/03L-0 ‎ (← links)
  • 05000155/LER-1980-007-03, /03L-0:on 800224,during Routine Operation,Excess Vibration Was Noted on Control Rod Drive Pump 2.Caused by Worn Suction Poppet Valves on Pump & Damage to Pump Piping Hangers from Vibration.Valves Replaced & Hangars Repaired ‎ (← links)
  • 05000155/LER-1980-007, Forwards LER 80-007/03L-0 ‎ (← links)
  • 05000155/LER-1979-027, Update to LER 79-027/03X-1:on 791115,through Seat Leakage Occurred at Outlet Valve M07053 of Loop 2.Cause Not Determined by Vendor Investigation.Valve Packing Replaced & Valve Stem Gearing Lubricated ‎ (← links)
  • 05000155/LER-1980-001-03, /03L-0:on 800114,temp Data for Loop 2 of Emergency Condenser Sys Revealed Through Seat Leakage on Normally Closed Outlet Valve M07053.Cause to Be Investigated at Future Shutdown ‎ (← links)
  • 05000155/LER-1980-001, Forwards LER 80-001/03L-0 & Update of LER 79-027/03X-1 ‎ (← links)
  • 05000155/LER-1980-004-01, /01T-0:on 800201,investigation of Minor Temp & Pressure Changes in Reactor Cooling Water Auxiliary Sys Revealed Broken Air Tubing Line to Control Valve CV4029. Possibly Caused by Contractor Workers.Line Repaired ‎ (← links)
  • 05000155/LER-1980-004, Forwards LER 80-004/01T-0 ‎ (← links)
  • 05000155/LER-1980-003-03, /03L-0:on 800123,following Automatic Test Circuit Alarm Indication,Channel D of Reactor Depressurizing Sys Removed from Svc for Troubleshooting.Caused by Automatic Test Circuit Component Failure ‎ (← links)
  • 05000155/LER-1980-002-03, /03L-0:on 800124,during Monthly Specific Gravity Checks,Cell 14 of Battery for Channel C of Reactor Depressurizing Sys Read Below Tech Spec.Cause Not Stated. Channel Removed from Svc to Replace Defective Cell ‎ (← links)
  • 05000155/LER-1978-048-03, During Power Operation, Noted Emergency Condenser Shell Side Temp Was 205 F.Temp Returned to Normal Levels When Inlet Valve in Loop 2 Closed. Caused by Improperly Fitted Gate Valve Disc ‎ (← links)
  • 05000155/LER-1978-048, Forwards Updated LER 78-048/03X-1 ‎ (← links)
  • 05000155/LER-1979-027-03, /03L-0:on 791115 During Power Operation,Emergency Condenser Sys Temps Indicated Leakage at Outlet Valve.Cause Will Be Investigated at Future Shutdown.No Leakage from Primary Sys Occurred ‎ (← links)
  • 05000155/LER-1979-003-03, /03L-0 on 790204:during Routine Testing of Two Containment Isolation Check Valves,Excessive Leakage Was Noted.Caused by Minor Dirt Deposits in Check Valve Seats.One Valve Cleaned & Other Replaced ‎ (← links)
  • 05000155/LER-1979-002-03, /03L-0 on 790203:condenser Hotwell Fill Valve CV/4009 Failed to Open During Normal non-safety Usage After Plant Shutdown.Caused by Failed Diaphragm in Valve Operator. Diaphragm Replaced & Tested Satisfactorily ‎ (← links)
  • 05000155/LER-1979-007-01, /01T-0 on 790222:unacceptable Weld Found in 6 Inlet Line to Emergency Condenser.Identified as 6-ECS-102-2. Will Repair Prior to Startup ‎ (← links)
  • 05000155/LER-1979-006-01, /01T-0 on 790221:during Weld Insps of Steel Pipe Junctions in Reactor Cleanup sys,crack-like Indications Found on Outside Diameter.Caused by Unknown Factors.Repairs Will Be Performed ‎ (← links)
  • 05000155/LER-1979-005-01, /01T-0 on 790219:during Testing of Control Rod Drive Scram Accumulator Level Switches,Seven Switches Failed to Operate.Caused by Broken or Marginal Reed Switches. Switches Replaced or Repaired ‎ (← links)
  • 05000155/LER-1979-004-01, /01T-0 on 790219:insp Revealed Unacceptable Weld in 6 Inch Inlet Line to Emergency Condenser.Caused by External Undercut & Insufficient Weld Filler on Weld External Cap.Will Repair Following Refueling Outage ‎ (← links)
  • 05000155/LER-1979-015-03, /03L-0 on 790319:during Plant Shutdown,Inverter Power Supply for One Containment Vacuum Loop Was Not Operating.Blown Fuse Found.Caused by Dirty Circuits Due to High Ventilation Air Flow.Unit Cleaned ‎ (← links)
  • 05000155/LER-1979-016-99, /99X-0 on 790313:during Reinstallation of Electric Fire Pump 480 Volt Circuit Breaker Following Routine Tripping,Breaker Case Was Cracked When Cable Lugs Were Tightened.Caused by Personnel Error.Personnel Instructed ‎ (← links)
  • 05000155/LER-1979-010-03, /03L-0 on 790221:during Test of Backup Supply Hose for post-incident Heat Exchanger,Hose Would Not Reach Exchanger.Caused by Snow Obstruction.Longer Hose Will Be Provided ‎ (← links)
  • 05000155/LER-1979-009-03, /03L-0 on 790223:feedwater Check Valve Leakage Exceeded Test Criteria.Incident Repetitive.Caused by Scale Particles on Valve Seat Preventing Tight Seal.Scale Removed & Seat Polished ‎ (← links)
  • 05000155/LER-1979-008-03, /03L-0 on 790227:starting Time of Emergency Diesel Generator Test Exceeded Criteria.Caused by Use of Fuel Priming Pump Possibly Introducing Air Into Fuel Lines ‎ (← links)
  • 05000155/LER-1979-008, Forwards LER 79-008/03L-0,79-009/03L-0 & 79-010/03L-0 ‎ (← links)
  • 05000155/LER-1978-044-01, /01X-1 on 781019:during Startup,Minor Leak Discovered at 3/4 Inch Vent Pipe Weld Attachment on 3 Inch Return Line from clean-up Sys to Reactor Recirculating Loop 2.Caused by Crack in Stainless Steel.Code Repairs Made ‎ (← links)
  • 05000155/LER-1978-044, Forwards LER 78-044/01X-1 ‎ (← links)
  • 05000155/LER-1979-001-03, /03L on 790201:during Testing of Two Containment Ventilation Supply Isolation Valves,Noted Containment Integrity Might Be Jeopardized.Caused by Maladjustment of Valve CV/4097 Disc Seal ‎ (← links)
  • 05000155/LER-1979-001, Forwards LER 79-001/03L-0 ‎ (← links)
  • 05000155/LER-1979-020-01, /01T-0 on 790609:vibration Heard in Primary Sys W/Recirculation Pump in Svc.Discovered Diffuser Dislodged in Pump 1 Inlet & Loose Diffuser in Pump 2 Inlet.Caused by Failure of Bolts Holding Diffuser for Reasons Unknown ‎ (← links)
  • 05000155/LER-1979-020, Forwards LER 79-020/01T-0 ‎ (← links)
  • 05000155/LER-1979-026-03, /03L-0:on 791101,during Monthly Specific Gravity Checks on Reactor Depressurizing Sys,Battery C,Cell 48 Read Below Tech Spec Limit.Plant in Shutdown Stage.Cause Undetermined.Cell Replaced on 791103 Prior to Plant Startup ‎ (← links)
  • 05000155/LER-1979-026, Forwards LER 79-026/03L-0 ‎ (← links)
  • 05000155/LER-1978-047-03, During Plant Startup, Control Rod Drive Temp on Drive E-2 Exceeded Tech Specs. Caused by Failure of Metal O-Ring Seal at Flange.New Seal Ring Installed Prior to Plant Startup.All O-Rings Replaced ‎ (← links)
  • 05000155/LER-1979-022-01, Design Review Revealed That,During Loca,Automatic Initiation of Reactor Scram, Containment Isolation,Core Spray & Reactor Depressurization May Not Function ‎ (← links)
  • 05000155/LER-1979-018-01, /01X-1:on 790420,following Maint,Minor Water Leak Observed Between Reactor Vessel & Rod Drive Housing.Caused by Bad Weld.Mechanical Expansion of Drive Housing Against Vessel Wall Sealed Leak Path Accomplished ‎ (← links)
  • 05000155/LER-1979-018, Forwards LER 79-018/01X-1 ‎ (← links)
  • 05000155/LER-1979-029-03, /03L-0:on 791215,neither Plant Ventilation Exhaust Fan Operating During 8-minute Planned Activity.Caused by Turning Off Fans to Facilitate Maint.Tech Specs Will Be Revised ‎ (← links)
  • 05000155/LER-1979-029, Forwards LER 79-029/03L-0 ‎ (← links)
  • 05000155/LER-1979-025, Anonymous Comment Superimposed on LER 79-025/01X-0 ‎ (← links)
  • 05000155/LER-1979-028-01, /01T-0:on 791213,design Review of CV4097 & CV4095 Containment Isolation Valves Indicated Valves Might Not Close Under Worst LOCA Pressure Conditions Unless Already Partially Closed.Caused by Inadequate Specs ‎ (← links)
  • 05000155/LER-1979-028, Forwards LER 79-028/01T-0 ‎ (← links)
  • 05000155/LER-1979-025-01, /01T-0:on 791030,failure in Electronic Power Supply Prevented Closure of Containment Ventilation Supply Isolation Valves CV4096 & CV4097.Caused by Transistor Failure in Power Supply Es 8501A ‎ (← links)
  • 05000155/LER-1979-024-03, /03L-0:on 790913,set Points for Pressure Switches on Reactor Depressurizing Sys Pump Discharge Drifted Below Tech Spec Requirement.Cause Not Known.Pressure Switches Were Reset to Trip at 105 Psig ‎ (← links)
  • 05000155/LER-1979-024, Forwards LER 79-024/03L-0 ‎ (← links)
  • 05000155/LER-1979-023-03, /03L-0:on 790911,automatic Isolation Valve CV/4027 Exhibited Leakage in Excess of Tech Spec Limit.Caused by Disc Contact Area on Seating Surface Not Providing Tight Shutoff Capability.Seat Was Machined & Valve Was Retested ‎ (← links)
  • 05000155/LER-1979-023, Forwards LER 79-023/03L-0 ‎ (← links)
  • 05000155/LER-1979-022, Forwards LER 79-022/01T-0 ‎ (← links)
  • 05000155/LER-1979-021-03, /03L-0 on 790616:static Inverter Power Supply for One Containment Vacuum Relief Loop Found de-energized. Caused by Blow Input Fuse.Fuse Replaced & Routine Equipment Checks Undertaken ‎ (← links)
  • 05000155/LER-1979-021, Forwards LER 79-021/03L-0 ‎ (← links)
  • 05000155/LER-1978-007-03, /03L-0:on 780209,during Routine Test Operation of Emergency Diesel Generator,Unit Tripped on High Water Temp After 25 Minutes of Operation.Caused by Leakage of Cooling Water Pump Shaft Packing Causing Cooling Sys Suction Los ‎ (← links)
  • 05000155/LER-1978-008-01, /01T-0:on 780215,during Maint of Reactor Depressurization Sys Control Circuitry,Fire Pump Control Switches Inadvertently Placed in Inhibit Position Incorrectly.Control Switches Marked W/Instructions ‎ (← links)
  • 05000155/LER-1978-010-01, /01T:on 780217,during Review of Electrical Equipment Required for Loca,Steam Drum Low Level Switches Deemed Inadequate for High Temp Environ.Caused by Reactor Protection Sys Not Being Evaluated ‎ (← links)
  • 05000155/LER-1980-022-03, /03L-0:on 800807,during Monthly Specific Gravity Checks,Cells 38,39 & 56 of Reactor Depressurizing Battery for Channel C Had Low Readings.Cause Not Known.Cell Units 13 & 19 Replaced.Channel C Restored on 800813 ‎ (← links)
  • 05000155/LER-1980-022, Forwards LER 80-022/03L-0 ‎ (← links)
  • 05000155/LER-2023-001, Human Performance Error Resulted in Compensatory Measures Not Properly Employed ‎ (← links)
• 05000155/LER-1982-033-03, /03L-0:on 821130,review Revealed That Previous Issue of Room Temp Vulcanizing Fire Barrier Matl Included Matl Exceeding Vendor Recommended Shelf Life.Caused by Personnel Error.Personnel Counseled ‎ (← links)
• 05000155/LER-1982-033, Forwards LER 82-033/03L-0 ‎ (← links)
• 05000155/LER-1982-024-03, /03L-0:on 820811,120-s Initiation Timer for One of Four Sensor Channels Failed to Trip During Monthly Reactor Depressurization Sys Testing.Caused by Defect in Timer Operation Due to Failure of Integrated Circuit Unit ‎ (← links)
• 05000155/LER-1982-024, Forwards LER 82-024/03L-0 ‎ (← links)