Pages that link to "05000409/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted"

The following pages link to 05000409/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted:

Displayed 33 items.

• 05000409/LER-1982-020, Updated LER 82-020/03X-1:on 821119-20,on Three Occasions Vacuum Pump Which Maintains Isokinetic Flow Rate to Stack Activity Monitors Tripped.Caused by Pump & Motor Overheating.Motor Thermal Overload Fuses Upgraded ‎ (← links)
• 05000409/LER-1982-016, Forwards LER 82-016/03L-0.Detailed Event Analysis Encl ‎ (← links)
• 05000409/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-012, Forwards LER 82-012/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-015, Forwards LER 82-015/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-014, Forwards LER 82-014/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-016-03, /03L-0:on 820702,during Refueling Outage 1,200 Gallons of Water Leaked from Condensate Demineralizer Sys. Caused by Resin Addition Not Closing When Turned to Close. Valve Control Relay Replaced ‎ (← links)
• 05000409/LER-1982-013-03, /03L-0:on 820603,during Cold Shutdown,Reactor Coolant Conductivity & Chloride Concentration Exceeded Tech Specs.Caused by Stagnant River Water Entering Reactor Vessel During Surveillance Test.Test Will Be Eliminated ‎ (← links)
• 05000409/LER-1982-012-03, /03L-0:on 820526,during Refueling Outage, Containment Bldg Fire Suppression Header Removed from Svc to Repair High Pressure Svc Water Containment Isolation Valve.Header Returned to Svc Upon Completion of Repairs ‎ (← links)
• 05000409/LER-1982-015-01, /01T-0:on 820616,both HPCS Pumps Placed in Pullout & LPCS Valve Control Switch Turned to Close to Prevent Challenging of Eccs.Caused by Shift Supervisor Not Cognizant of Work Scope Involved W/Change ‎ (← links)
• 05000409/LER-1982-008-03, /03L-0:on 820517,high Pressure Svc Water Diesel Pump 1A Failed to Start.Caused by Chewed Gear in Starter Motor.Gear & Starter Motor Replaced ‎ (← links)
• 05000409/LER-1982-007-03, /03L-0:on 820515,during Refueling Outage,Buses 1A & 1B Were Supplied by 1A & 1B Emergency Diesel Generators for 12 Minutes.Caused by Undervoltage Relay Breaker Opened During Troubleshooting of Dc Ground ‎ (← links)
• 05000409/LER-1982-014-01, /01T-0:on 820605,gross Alpha Activity Exceeded Tech Spec Limitation During Startup from Refueling Outage. Caused by Degraded Fuel Cladding Experience Contributing to Irradiated Fuel Particles in RCS ‎ (← links)
• 05000409/LER-1982-011-01, /01T-0:on 820523,while Performing Leak Tests on High Pressure Svc Water Containment Isolation Valve & Electrical Penetration Unit 5,leak Flow Rate Found Exceeding Tech Spec Limit.Caused by Hardening of Epoxy Sealant ‎ (← links)
• 05000409/LER-1982-010-01, /01T-0:on 820521,while Performing Type C Leak Tests on Containment Bldg Heating Steam Condensate Return Isolation Valve,Leakage Flow Rate Found Exceeding Tech Spec Limit.Cause Not Stated.Valve Internals Replaced ‎ (← links)
• 05000409/LER-1982-009-01, /01T-0:on 820520,while Performing Type C Leak Tests on Retention Tank Pump Discharge Valve,Leakage Flow Rate Found Exceeding Tech Spec Limit.Cause Not Stated. Valve Relapped & Restroked ‎ (← links)
• 05000409/LER-1982-006-01, /01T-0:on 820420,during Reactor Refueling,Insp Revealed Degraded Segment on Fuel Assembly 1-8.Caused by Pellet/Clad Interaction W/Oxygen Resulting in Cracking. Allis-Chalmers Assembly Replaced W/Exxon Assembly ‎ (← links)
• 05000409/LER-1982-006, Forwards LER 82-006/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-005-01, /01T-0:on 820413,discrepancy Discovered in Seismic & Stress Analysis of HPCS Discharge Piping.Caused by Analytical Models Being Based on Piping Matls & Configuration for Const Under Allis-Chalmers Contract ‎ (← links)
• 05000409/LER-1982-005, Forwards LER 82-005/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-004-03, /03L-0:on 820329,emergency Svc Water Supply Sys Suction Hoses Leaked During First Positive Pressure Hydrostatic Surveillance Test.Caused by Flat Spot in Hose Fitting Castings.Spot Filed & Hose Reclamped ‎ (← links)
• 05000409/LER-1982-004, Forwards LER 82-004/03L-0 & Updated LER 81-015/01X-1. Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-003-03, /03L-0:on 820313,during Type B Leakage Test on Personnel Airlock,Manometer Read Incorrectly.Caused by Inadequate Tightening of Strongbacks on Inner Door.Need for Tight Installation Emphasized & Procedure Revised ‎ (← links)
• 05000409/LER-1982-003, Forwards LER 82-003/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-002-03, /03L-0:on 820121,containment Bldg Fire Detection Zone 19 Placed in Bypass.Caused by Spurious Alarm Annunciation Due to Faulty Detector Head Over Msiv.Head Cleaned ‎ (← links)
• 05000409/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000409/LER-1982-001-01, /01T-0:on 820108,during Annual Test,Reactor Bldg Spray Valve Could Not Be Opened Using Manual Handwheel in Control Room.Caused by Separation of Coupling Between Valve & Shaft.Coupling Reconnected ‎ (← links)
• ML20040G628 (redirect page) ‎ (← links)
• 05000409/LER-1982-001 (redirect page) ‎ (← links)
  • 05000409/LER-1979-019, Forwards LER 79-019/01T-0 ‎ (← links)
  • 05000409/LER-1982-020, Updated LER 82-020/03X-1:on 821119-20,on Three Occasions Vacuum Pump Which Maintains Isokinetic Flow Rate to Stack Activity Monitors Tripped.Caused by Pump & Motor Overheating.Motor Thermal Overload Fuses Upgraded ‎ (← links)
  • 05000409/LER-1983-001, Forwards LER 83-001/03L-0 & Updated LER 82-020/03X-1. Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1982-016, Forwards LER 82-016/03L-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1982-013, Forwards LER 82-013/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-012, Forwards LER 82-012/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-015, Forwards LER 82-015/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-014, Forwards LER 82-014/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1989-001, :on 890424,discovered That Weekly Battery Tests for Previous Wk Had Not Been Performed.Caused by Absences of Key Personnel Who Supervise & Perform Tests.Required Testing Procedures Performed ‎ (← links)
  • 05000409/LER-1987-005, :on 870712,containment Ventilation Isolation Occurred When Containment Bldg Gas Activity Monitor Failed High.Caused by Failed Transistor in Chassis for Air Ejector Offgas Monitor.Chassis Replaced ‎ (← links)
  • 05000409/LER-1987-007, :on 871109,determined That Plug Not Installed in Hole in Floor Between Machine Shop & Tunnel in Turbine Bldg.Caused by Plug Probably Not Reinstalled After Aug 1987 Insp.Plug Reinstalled & Marked as Barrier ‎ (← links)
  • 05000409/LER-1987-006, :on 870923,containment Ventilation Valves Shut Automatically Due to High Activity Alarm on Containment Bldg Delayed Particulate Monitor.Caused by Spiking of Unknown Origin.Monitor Checked & No Problems Found ‎ (← links)
  • 05000409/LER-1990-004, :on 901013,diesel Generator 1A Failed to Successfully Complete 18-month Test ‎ (← links)
  • 05000409/LER-1987-004, :on 870601,core Spray Bundle Flange Leaked. Caused by Loose Flange Bolts & Less Compression of Gasket on One Side than Other.No Further Investigation Into Cause Will Be Conducted ‎ (← links)
  • 05000409/LER-1986-030, :on 860919,high Flux Scram Received on Nuclear Instrumentation Channel 6,causing Fast Spike from 19 to 36% of Scale.Caused by Malfunction of Instrument Channel. Replacement Nuclear Instrumentation Ordered ‎ (← links)
  • 05000409/LER-1986-027, :on 860910,reactor Tripped Due to Indication on source-range Nuclear Instrumentation Channel 2 Decreasing Before Channel Reached Full Scale.Caused by Undersized Output Tube Pins.Tube Replaced ‎ (← links)
  • 05000409/LER-1986-028, :on 860913,reactor Scrammed When Turbine Stop Valve Opened Later than Required by Procedure.Caused by Operator Error.Procedure Change Initiated to Tie Turbine & Plant Startup Procedures Together ‎ (← links)
  • 05000409/LER-1986-026, :on 860910,spike Occurred on wide-range Nuclear Instrumentation Channel 5 When Range Switch Upscaled During Startup.Caused by Damaged Balance Pot Screw.Pot Balanced ‎ (← links)
  • 05000409/LER-1986-033, :on 861011,alarm/trip Contacts on Containment Bldg Immediate Particulate Monitor Did Not Actuate Consistently.On 861016 & 17,control Rods Withdrawn.Caused by Inaccurate Monitor Documentation ‎ (← links)
  • 05000409/LER-1986-032, :on 861027,during Reactor Shutdown,Control Rod 5 Scram Occurred.Caused by Nuclear Instrumentation Source Range Channel 1 Scram.Discriminator Curve Run for Nuclear Instrumentation Channel 1 ‎ (← links)
  • 05000409/LER-1986-025, :on 860821,containment Bldg Ventilation Isolation Occurred on High Gaseous Activity Monitor Alarm. Caused by Welding.Correlation Between Welding & Increased Gaseous Activity Checked ‎ (← links)
  • 05000409/LER-1986-024, :on 860719,water Splashed Off Pipe Onto Solenoid Causing Ventilation Header Solenoids to Deenergize. Caused by Blown Fuse 30-2.Fuse Replaced ‎ (← links)
  • 05000409/LER-1986-036, :on 861209,reactor Scrammed from 97% Power. Caused by Failure of Scram Solenoids on Control Rod 18.Scram Solenoids Replaced & Will Be Added to CRD Mechanism Preventive Maint Program ‎ (← links)
  • 05000409/LER-1987-002, :on 870216,manual Reactor Scram Following Receipt of First Out Alarm on Annunciator Scram Panel Occurred.Caused by Shorted Input Capacitor in Alarm Card. Alarm Card Replaced ‎ (← links)
  • 05000409/LER-1986-020, :on 860708,reactor Scrammed When Scram Solenoid on CRD 12 Failed.Caused by Either Random Solenoid Failure or Water Intrusion.Spare CRD Installed ‎ (← links)
  • 05000409/LER-1986-023, :on 860719,loss of Offsite Power Occurred. Caused by Lightning Strike at Adjacent Coal Plant Auxiliary Switchyard.Offsite Power Restored After 12 Minutes ‎ (← links)
  • 05000409/LER-1986-035, :on 861118,failure of Low turbine-condenser Vacuum Relay SK25/1 Caused Reactor Scram W/Excessively Fast Cooldown.Caused by Failure of Allied Control,Model MHYO-12A 115-volt Ac Relay ‎ (← links)
  • 05000409/LER-1986-034, :on 861112,containment Ventilation Valves Closed Automatically When Indication on Containment Bldg Immediate Particulate Monitor Spiked High.Caused by Manipulation of Range Switch.Contacts Cleaned ‎ (← links)
  • 05000409/LER-1986-016, :on 860510 & 13,static Inverter 1A Failed & Transferred Bus 1A to Alternate Source.Caused by Diode Short in Static Inverter 1A Power Supply.Inverters Replaced ‎ (← links)
  • 05000409/LER-1986-029, :on 860918,reactor Scrammed on Low Recirculation Flow When Forced Circulation Pump 1B Tripped. Caused by Closed Seal Inject Supply Valve.Valve Controller Rebuilt & Procedure Change Implemented ‎ (← links)
  • 05000409/LER-1987-001, :on 870107,reactor Scrammed When Turbine Stop Valve Partially Closed.Possibly Caused When Turbine Reset During Simulated Overspeed Test or Oil Pressure at Stop Valve Temporarily Decreasing.Valve Closed ‎ (← links)
  • 05000409/LER-1986-038, :on 861216,boron Tank Solution Concentration Below Tech Spec Min of 17.8% by Weight.Caused by Leaking Core Spray Pump Boron Solution Inlet Valve 60-25-005.Valve Cycled & Flushed ‎ (← links)
  • 05000409/LER-1986-037, :on 861213,containment Bldg Ventilation Valves Closed Automatically When High Activity Alarm Received from Immediate Particulate Monitor.Cause Undetermined.Activity Returned to Normal ‎ (← links)
  • 05000409/LER-1986-019, :on 860627,reactor Scrammed on High Power/ Recirculation Flow Signal.Caused by Improper Setting of Linkage Control to Reactor Feedwater Pump 1B.Linkage Readjusted & New Procedure Written ‎ (← links)
  • 05000409/LER-1986-018, :on 860622,reactor Scrammed Due to Relay Failure & Line Separation at Reactor Water Level Transmitter.Water Level Transmitters Recalibr ‎ (← links)
  • 05000409/LER-1987-003, :on 870311,containment Bldg Gas Monitor Alarmed Causing Containment Bldg Ventilation Dampers & Vent Header Valve to Close.Caused by Dirty Contacts on Monitor Ratemeter Range Switch.Isolation Signal Reset ‎ (← links)
  • 05000409/LER-1986-014, :on 860418,determined That During Discharge of 3,000 Gallon Waste Tank,Water from 4,500 Gallon Waste Tank Also Pumped.Caused by Open Suction Valve Leading to Operating Waste Transfer Pump.Valve Closed ‎ (← links)
  • 05000409/LER-1999-001, :on 990305,excessive back-flow Through Return Line Check Valve Was Noted.Check Valve Were Declared Inoperable.Compensatory Actions for Fesw Sys Pipe Break Were Established.With ‎ (← links)
  • 05000409/LER-1986-022, :on 860718,during Reactor Shutdown,Two Small Cracks Leaking Water on Decay Heat Suction Line Discovered. Cause Unknown.Pipe Section Removed & Replaced.Cracks Will Be Examined to Determine Cause ‎ (← links)
  • 05000409/LER-1986-021, :on 860716,reactor Scram Occurred.Caused by Static Inverter 1A Transferring Alternate Source & Momentarily Deengergizing Scram Trains.Inverter Will Be Replaced Prior to Plant Startup ‎ (← links)
  • 05000409/LER-1983-001-03, /03L-0:on 830325,following Low Reactor Water Level scram,1B HPCS Pump Observed Not Running.Caused by Backward Installation of Current Transformer in HPCS Pump Breaker Ground Fault Trip Device ‎ (← links)
  • 05000409/LER-1986-010, :on 860404,containment Ventilation Valves Closed When Containment Bldg Gas Monitor Failed High.Cause Not Found.Troubleshooting Performed on Instrument Drawer Detected No Problems ‎ (← links)
  • 05000409/LER-1986-009, :on 860403,old Retention Tank Pump Discharge Valve Failed Type C Leak Test.Cause Unknown.New Retention Tank Pump Discharge Valve Installed & Tested.No Leakage Measured Through New Valve ‎ (← links)
  • 05000409/LER-1986-008, :on 860403,spurious Low Reactor Water Level Signal Received.Caused by Mistakenly Deenergized Electric Distribution Panel During Troubleshooting of Instrumentation Problem.Sys Restored to Normal ‎ (← links)
  • 05000409/LER-1986-007, :on 860315,control Rod Found to Have Been Unlatched from Drive Mechanism Since Sept 1984.Caused by Inadequate Procedure for Latching Control Rods.Tolerance on Data Sheet Revised ‎ (← links)
  • 05000409/LER-1986-006, :on 860307,reactor Scrammed Due to Loss of Voltage on 2400-volt Bus 1B When Reserve Feed Breaker 1B Failed to Close.Caused by Loose Part in Hydraulic Scram Motor.Spare Breaker Installed ‎ (← links)
  • 05000409/LER-1986-015, :on 860506,while Reactor Shut Down,Spike Occurred on Nuclear Instrumentation Channel 6,generating Scram Signal.Caused by Burned Out Filament in Tube in Positive High Voltage Power Supply ‎ (← links)
  • 05000409/LER-1986-017, :on 860512,during 18-month Fire Barrier Surveillance,Small Opening Found in Cable Tray Barrier Between Electrical Equipment Room & Turbine Bldg.Caused by Maint in Area ‎ (← links)
  • 05000409/LER-1986-013, :on 860418,480-volt Essential Bus Main Feed Breaker 1B Tripped & Emergency Diesel Generator 1B Started When Control Switch Returned to Automatic.Caused by Blown Fuse.Fuse Replaced ‎ (← links)
  • 05000409/LER-1986-031, :on 861008,emergency Equipment Started Due to Momentary Disruption in Noninterruptible Bus.Caused by Blown Fuse in Inverter.Fuse Replaced & Inverter Thoroughly Checked Out & Determined If Functioning Properly ‎ (← links)
  • 05000409/LER-1988-002, :on 880129,temporary Absence of Duty Shift Supervisor from Shift.Scheduled Shift Supervisor Realized Absence & Assumed Duty Himself.Cause Unstated.Proper Shift Turnover Conducted ‎ (← links)
  • 05000409/LER-1986-005, :on 860124,high Pressure Svc Water/Alternate Core Spray Diesel 1A Removed from Svc to Replace Weeping Cooling Water Pump Discharge Hose.Surveillance Test Conducted Following Hose Replacement ‎ (← links)
  • 05000409/LER-1986-002, :on 860110,noninterruptible Bus 1B Deenergized. Caused by Incorrect Breaker Alignment by Operator.Procedure for Placing Static Inverter 1B in Svc on Noninterruptible Bus 1B Revised ‎ (← links)
  • 05000409/LER-1986-003, :on 860112,reactor Scram Occurred.Caused by Adjustment of Seal Supply Valve When Seal Injection Supply Line to CRD Discovered Isolated.Importance of Performance of Duties Emphasized ‎ (← links)
  • 05000409/LER-1986-001, :on 860106,during Performance of Type C Leakage Test on Reactor Bldg MSIV & Bypass,Leakage Measured Above Acceptance Criteria.Caused by Valve Plug Hitting One Side of Seat More than Other.New Seat Installed ‎ (← links)
  • 05000409/LER-1986-004, :on 860113,during Discharge of 3,000 Gallon Waste Tank to River,Contents of 4,500 Gallon Waste Tank Also Discharged.Caused by Failure of Waste Water Pump Suction Valve.Valve Repaired ‎ (← links)
  • 05000409/LER-1985-020, :on 851231,high Pressure Svc Water Diesel Pump 1A Failed Following Addition of Fuel Additive.Caused by Faulty Fuel Injection Pump.Pump Replaced.Periodic Pump Replacement Will Be Added to Maint Program ‎ (← links)
  • 05000409/LER-1978-013-03, /03L-0 on 781202:periodic Leakage Rate Test for Personnel Did Not Meet Type B Test Criteria as Specified by Tech Specs.Test Strongbacks Were Not Completely Tightened Thereby Causing Seal to Stretch Upon Initial Pressurizatio ‎ (← links)
  • 05000409/LER-1978-013, Forwards LER 78-013/03L-0 ‎ (← links)
  • 05000409/LER-1988-001, :on 880129,containment Bldg Ventilation Valves Closed Automatically Due to High Activity Alarm on Delayed Particulate Monitor.Possibly Caused by Spikes Attributed to Welding Operations.Monitor Drawer Checked ‎ (← links)
  • 05000409/LER-1978-010-03, /03L-0 on 780811:During Change of Engine Sump Lube Oil on 1A Diesel Generator,Lube Oil Was Diluted with Diesel Fuel oil.1B Diesel Generator & Other AC Sources Provided Required Elec Pwr.(Encl to 7809270110) ‎ (← links)
  • 05000409/LER-1978-010, Forwards LER 78-010/03L-0 ‎ (← links)
  • 05000409/LER-1984-023, :on 841207,inner Door Upper & Lower Handwheel Shaft Mechanical Seals of Personnel Airlock Leaked Air in Excess of Acceptance Criteria.Both Inner Door Handwheel Shaft Seals Replaced ‎ (← links)
  • 05000409/LER-1985-016, :on 850914,fuse Supplying Control Room Instrumentation from Noninterruptible Bus 1B Blew,Causing Reactor Scram on High Water Level.Caused by Technician Error.Fuse Replaced ‎ (← links)
  • 05000409/LER-1985-018, :on 851023,high Flux Scram Alarm Received on Nuclear Instrumentation Channel 6.Caused by Malfunction in Oscillator Circuit on Trip Stage.Step Added to Plant Startup Procedure to Ensure Recorders on ‎ (← links)
  • 05000409/LER-1985-017, :on 851022 Reactor Scrammed Due to High Flux. Caused by Loss of Load Due to Maint on Tie Line Breaker 2NB11 & Loss of Offsite Power.Power Supply to Breaker Compressor Changed ‎ (← links)
  • 05000409/LER-1985-019, :on 851026,partial Reactor Scram Occurred Due to Momentary Short in CRD Gas Pressure Circuit.Caused by Worn Mechanical Seal Allowing More Seal Water to Flow Through than Normal.Seal Leakage Reduced ‎ (← links)
  • 05000409/LER-1985-014, :on 850725,partial Reactor Scram Occurred,Hpcs Pumps & Emergency Diesel Generators Started & Containment Bldg Isolated.Caused by Ground in Gas Pressure Scram Circuit.Ground Located & Wire Repaired ‎ (← links)
  • 05000409/LER-1985-015, :on 850726,scram Occurred from Approx 0.06% Power.Caused by Indicated Flux Spike When Range Switch on Nuclear Instrumentation Channel 5 Was Upscaled.Range Switch Contacts Cleaned.Switch Elimination Planned ‎ (← links)
  • 05000409/LER-1996-002, :on 961022,failure to Review Temporary Changes within 30 Days Occurred.Procedure Has Been Revised ‎ (← links)
  • 05000409/LER-1997-001, :on 970102,1A EDG Trouble Annunciator Alarmed Due to High Coolant Temperature of 205 Degrees F.All PMs Associated W/Sys That Require Second Verification Will Be Reviewed & Revised as Necessary ‎ (← links)
  • 05000409/LER-1996-001, :on 960919,noted Documentation of Checks Not Being Performed as Required by Procedure.Caused by Area Radiation Monitor Chart Recorder Out of Svc for Repairs. Plant Manager Issued Memo to Personnel ‎ (← links)
  • 05000409/LER-1996-003, :on 961210,generator Plant Battery Found to Have Pilot Cell Specific Gravity of 1.198 Resulting in Bus Being Declared Inoperable & Battery Being Placed on Equalizing Charge ‎ (← links)
  • 05000409/LER-1985-013, :on 850701,09,10 & 12,high Pressure Svc Water diesel-driven Pump 1A Malfunctioned.Caused by Air in Fuel Line.Priming Tank Refilled & Diesel Fuel Filters Vented ‎ (← links)
  • 05000409/LER-1985-011, :on 850427,reactor Scrammed Due to Low Water Level When Oncoming Reactor Feedwater Pump Did Not Respond Properly During Swap of Operating Feedwater Pumps.Caused by Erratic Operating Pump Control ‎ (← links)
  • 05000409/LER-1985-010, :on 850424,degraded Fire Barrier Penetration Discovered.Caused by Improper Installation.Barriers Repaired.Caution Sign Posted Near Electrical Penetrations in Fire Barriers Protecting safety-related Areas ‎ (← links)
  • 05000409/LER-1985-008, :on 850420,partial Reactor Scram Occurred Due to Failure of Solenoid Valve on Control Rod 12.Full Scram Signal Received Following Insertion of 13 Ctr Crds.Caused by Reserve Feed Breaker 1B Failure ‎ (← links)
  • 05000409/LER-1985-009, :on 850421,leak Developed in Seal Inject Supply Line to CRD Mechanisms.Caused by Rupture in High Pressure Hose Between Flow Orifice & Transmitter.Reactor Shutdown & Hose Plugged ‎ (← links)
  • 05000409/LER-1985-006, :on 850410,following Completion of Discharge from Turbine Bldg Waste Water Tank,Drain Sys Not Isolated from Tank.Caused by Personnel Error.Activity of Sample within Limits.Procedure Revised ‎ (← links)
  • 05000409/LER-1985-007, :on 850412,after Reactor Vessel Hydrostatic Test Performed,Alternate Core Spray Sys Noticed to Be Manually Lined Up to River,Rather than Reactor Vessel.Caused by Personnel Error.Procedure Modified ‎ (← links)
  • 05000409/LER-1992-001, :on 920712,1B non-interruptible Bus Rendered Inoperable When Blade from Internal Cooling Fan Fell Onto Electrical Components Inverter.Event Originally Processed as Incident Rept.Update Will Be Submitted ‎ (← links)
  • 05000409/LER-1985-012, :on 850517,reactor Partial Scram Occurred Due to Low Gas or Oil Signal from CRD Mechanism.Caused by Decrease in Accumulator Pressure on CRD Mechanism 8 or 21 Until Low Pressure Setpoint Reached ‎ (← links)
  • 05000409/LER-1979-019-01, /01T-0:on 791223,periodic Leakage Rate Test for Emergency Airlock Did Not Meet Type B Test Criteria Specified by Tech Specs.Caused by Flattened O Rings & Shaft Packaging in Shaft Seal.Seal Replaced ‎ (← links)
  • 05000409/LER-1978-008-03, /03L-0 on 780620:zone 13 Fire & Smoke Detection Sys Placed on Bypass Following False Alarms.Caused by Malfunctioned Detector Head Which Had Been Overlooked by Personnel Implementing Tech Specs ‎ (← links)
  • 05000409/LER-1978-008, Forwards LER 78-008/03L-1 ‎ (← links)
  • 05000409/LER-1978-012-01, /01T-0 on 781126:Leakage Rate Test for Emergency Airlock Did Not Meet Type B Test Criteria Req by Tech Specs. Leakage Rate Was 1.037 Scfh in Excess of Limit.Leakage Was Due to Scratches on Valve Seats.Valve Was Replaced ‎ (← links)
  • 05000409/LER-1978-012, Forwards LER 78-012/01T-0 ‎ (← links)
  • 05000409/LER-1978-011, Forwards LER 78-011/01T-0 ‎ (← links)
  • 05000409/LER-1982-016-03, /03L-0:on 820702,during Refueling Outage 1,200 Gallons of Water Leaked from Condensate Demineralizer Sys. Caused by Resin Addition Not Closing When Turned to Close. Valve Control Relay Replaced ‎ (← links)
  • 05000409/LER-1982-013-03, /03L-0:on 820603,during Cold Shutdown,Reactor Coolant Conductivity & Chloride Concentration Exceeded Tech Specs.Caused by Stagnant River Water Entering Reactor Vessel During Surveillance Test.Test Will Be Eliminated ‎ (← links)
  • 05000409/LER-1982-012-03, /03L-0:on 820526,during Refueling Outage, Containment Bldg Fire Suppression Header Removed from Svc to Repair High Pressure Svc Water Containment Isolation Valve.Header Returned to Svc Upon Completion of Repairs ‎ (← links)
  • 05000409/LER-1982-015-01, /01T-0:on 820616,both HPCS Pumps Placed in Pullout & LPCS Valve Control Switch Turned to Close to Prevent Challenging of Eccs.Caused by Shift Supervisor Not Cognizant of Work Scope Involved W/Change ‎ (← links)
  • 05000409/LER-1982-008-03, /03L-0:on 820517,high Pressure Svc Water Diesel Pump 1A Failed to Start.Caused by Chewed Gear in Starter Motor.Gear & Starter Motor Replaced ‎ (← links)
  • 05000409/LER-1982-007-03, /03L-0:on 820515,during Refueling Outage,Buses 1A & 1B Were Supplied by 1A & 1B Emergency Diesel Generators for 12 Minutes.Caused by Undervoltage Relay Breaker Opened During Troubleshooting of Dc Ground ‎ (← links)
  • 05000409/LER-1982-014-01, /01T-0:on 820605,gross Alpha Activity Exceeded Tech Spec Limitation During Startup from Refueling Outage. Caused by Degraded Fuel Cladding Experience Contributing to Irradiated Fuel Particles in RCS ‎ (← links)
  • 05000409/LER-1982-011-01, /01T-0:on 820523,while Performing Leak Tests on High Pressure Svc Water Containment Isolation Valve & Electrical Penetration Unit 5,leak Flow Rate Found Exceeding Tech Spec Limit.Caused by Hardening of Epoxy Sealant ‎ (← links)
  • 05000409/LER-1982-010-01, /01T-0:on 820521,while Performing Type C Leak Tests on Containment Bldg Heating Steam Condensate Return Isolation Valve,Leakage Flow Rate Found Exceeding Tech Spec Limit.Cause Not Stated.Valve Internals Replaced ‎ (← links)
  • 05000409/LER-1982-009-01, /01T-0:on 820520,while Performing Type C Leak Tests on Retention Tank Pump Discharge Valve,Leakage Flow Rate Found Exceeding Tech Spec Limit.Cause Not Stated. Valve Relapped & Restroked ‎ (← links)
  • 05000409/LER-1982-006-01, /01T-0:on 820420,during Reactor Refueling,Insp Revealed Degraded Segment on Fuel Assembly 1-8.Caused by Pellet/Clad Interaction W/Oxygen Resulting in Cracking. Allis-Chalmers Assembly Replaced W/Exxon Assembly ‎ (← links)
  • 05000409/LER-1982-006, Forwards LER 82-006/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-005-01, /01T-0:on 820413,discrepancy Discovered in Seismic & Stress Analysis of HPCS Discharge Piping.Caused by Analytical Models Being Based on Piping Matls & Configuration for Const Under Allis-Chalmers Contract ‎ (← links)
  • 05000409/LER-1982-005, Forwards LER 82-005/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-004-03, /03L-0:on 820329,emergency Svc Water Supply Sys Suction Hoses Leaked During First Positive Pressure Hydrostatic Surveillance Test.Caused by Flat Spot in Hose Fitting Castings.Spot Filed & Hose Reclamped ‎ (← links)
  • 05000409/LER-1982-004, Forwards LER 82-004/03L-0 & Updated LER 81-015/01X-1. Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-003-03, /03L-0:on 820313,during Type B Leakage Test on Personnel Airlock,Manometer Read Incorrectly.Caused by Inadequate Tightening of Strongbacks on Inner Door.Need for Tight Installation Emphasized & Procedure Revised ‎ (← links)
  • 05000409/LER-1982-003, Forwards LER 82-003/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1990-003, :on 900608,five Required Fire Protection QA Audits Missed.Caused by Scheduling Error Since 890101.Util Reverted to Original QA Audit Schedule ‎ (← links)
  • 05000409/LER-1982-002-03, /03L-0:on 820121,containment Bldg Fire Detection Zone 19 Placed in Bypass.Caused by Spurious Alarm Annunciation Due to Faulty Detector Head Over Msiv.Head Cleaned ‎ (← links)
  • 05000409/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-001-01, /01T-0:on 820108,during Annual Test,Reactor Bldg Spray Valve Could Not Be Opened Using Manual Handwheel in Control Room.Caused by Separation of Coupling Between Valve & Shaft.Coupling Reconnected ‎ (← links)
  • 05000409/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-013-03, Following scram,1B 2,400-volt Bus Reserve Feed Breaker Did Not Close Automatically.Cause Undetermined.Reserve Feed Breaker Control Switch Flagged to Trip Position ‎ (← links)
  • 05000409/LER-1981-014-03, /03L-0:on 811223,following Scram,Offsite Transmission Network Did Not Automatically Supply Onsite Power Distribution Sys.Cause Undetermined.Transformer Breaker Closed ‎ (← links)
  • 05000409/LER-1981-014, Forwards LER 81-014/03L-0 & Updated LER 81-013/03X-1. Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1981-015-01, /01T-0:on 811224,following Reactor Scram,Temp of 1B Forced Circulation Loop Piping Decreased Below Tech Specs Limit.Caused by Inoperation of Pump Due to Seal Problems & Lack of Monitoring.Personnel Reinstructed ‎ (← links)
  • 05000409/LER-1981-015, Forwards LER 81-015/01T-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1981-013, Forwards LER 81-013/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-011-03, /03L-0:on 811031,observed That Radiation Hose on High Pressure Svc Water Diesel Engine 1B Was Slightly Cracked.Cause Not Stated.Hose Replaced & Diesel 1B Tested Satisfactorily ‎ (← links)
  • 05000409/LER-1981-011, Forwards LER 81-011/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-012-03, /03L-0:on 811101,gasoline Levels in Three Emergency Svc Water Supply Sys Gasoline Engine Driven Pumps & Spare Pump Found to Be Less than 5 Gallons During Monthly Insp.Cause Unknown.Gasoline Added to Fill Tanks ‎ (← links)
  • 05000409/LER-1981-012, Forwards LER 81-012/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-009-03, /03L-0:on 810917,upscale Trip Setpoint on Nuclear Instrument Channel 7 Found in Excess of Tech Spec Limit. Cause Not Determined.Setpoint Reset ‎ (← links)
  • 05000409/LER-1981-009, Forwards LER 81-009/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-010-01, /01T-0:on 810923,during Normal Operation Mechanical Interlock Preventing Simultaneous Opening of Both Doors of Containment Bldg Personnel Airlock Failed.Caused by Worn or Misadjusted Actuating Mechanism.Drawings Encl ‎ (← links)
  • 05000409/LER-1981-010, Forwards LER 81-010/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1982-019-03, /03L-0:on 820927,during Power Escalation Following Refueling Outage,Water Level Safety Channel 3 Determined Nonconservative W/Respect to Possible Low Water Level Condition.Caused by Transmitter Drift.Channel Adjusted ‎ (← links)
  • 05000409/LER-1982-019, Forwards LER 82-019/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1983-004-03, /03L-0:on 830531,during Power Escalation Following Shutdown,Water Level Safety Channel 3 Indicated Approx 5 Inches High.Caused by Physical Differences in Sensing Lines. Channel 3 Adjusted ‎ (← links)
  • 05000409/LER-1983-003-01, /01T-0:on 830527,two Containment Bldg Pressure Sensing Lines Found Capped.Caused by Personnel Error.Cap Removed.Broken Identification Tag Replaced.Line Modified to Prevent Future Capping ‎ (← links)
  • 05000409/LER-1981-008-01, /01T-0:on 810729,main Steam Bypass Valve Did Not Open During Momentary Pressure Spikes Approx 20 Psi Above Nominal Reactor Pressure.Caused by Decrease in Pressure Prior to Valve Opening Due to Short Duration & Spikes ‎ (← links)
  • 05000409/LER-1981-008, Forwards LER 81-008/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-003-03, /03L-0:on 810202,gross Alpha Activity of Primary Coolant Sample Exceeded Tech Spec.Caused by Degraded Fuel Cladding During Previous Fuel Cycles.Primary Purification Sys Operation Reduced Concentration to Allowable Level ‎ (← links)
  • 05000409/LER-1981-003, Forwards LER 81-003/03L-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1990-002, :on 900115,discovered That Data Recorded for 18-month Surveillance Test of Diesel Bldg Battery Charger, Completed on 871005,showed Less than 50 Amperes for 4 Consecutive Hours.Memo Issued to Personnel ‎ (← links)
  • 05000409/LER-1990-001, :on 900115,discovered That Weekly Battery Tests for Batteries Supplying Dc Buses,Emergency Diesel Generators & High Pressure Svc Diesels Not Performed for Wk of 890312-18.Second Electrician hired.W/900205 ‎ (← links)
  • 05000409/LER-1981-002-02, /02L-0:on 810201,independent Circuit Between Offsite Transmission Network & Onsite Power Distribution Sys Was Disconnected.Caused by Operator Opening Incorrect Disconnect Switch.Switch Reclosed.Operators Retrained ‎ (← links)
  • 05000409/LER-1981-002, Forwards LER 81-002/02L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000409/LER-1981-006-01, /01T-0:on 810518,during Installation of Attachment on Containment Pressure Sensing Line,High Containment Bldg Pressure Starting Signal to HPCS Pump 1B,auxiliary Cooling Sys Pump & AC Valve Was Isolated.Procedures Not Followe ‎ (← links)
  • 05000409/LER-1981-006, Forwards LER 81-006/01T-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000409/LER-1980-016-01, /01T-0:on 801202,hourly Fire Watch Patrol Not Established within 1-h of Drilling Holes Through Turbine Bldg Barriers for Fire Protection & Sampling Sys.Job Coordinators Reminded of Fire Barrier Requirements ‎ (← links)
  • 05000409/LER-1980-016, Forwards LER 80-016/01T-0 ‎ (← links)
  • 05000409/LER-1981-001-02, /02L-0:on 810201,independent Circuit Between Offsite Transmission Network & Onsite Power Distribution Sys Disconnected.Caused by Disconnect Switch Opened Due to Operator Error.Two Operators to Operate Switching Order ‎ (← links)
  • 05000409/LER-1981-001-03, /03L-0:on 810116,independent Circuit Between Offsite Transmission Network & Onsite Power Distribution Sys Disconnected.Caused by Maint on Main Transformer Airbreak Switch 25NA1 Due to Ice in Swivel Joint.Ice Melted ‎ (← links)
  • 05000409/LER-1980-009-03, /03L-0:on 801027,mechanical Interlock Preventing Containment Bldg Personnel Airlock Doors from Opening Simultaneously Found Inoperable.Caused by Stripped Door Link Subassembly.Door Guarded & Padlocked & Subassembly Repaired ‎ (← links)
  • 05000409/LER-1980-010-03, /03L-0:on 801028,shutdown Condenser Control Valve Quarterly Test Performed Approx 4-h Beyond Deadline.Caused by Personnel Error.Test Performed & Supervisor Will Check Schedule More Closely in Future ‎ (← links)
  • 05000409/LER-1980-009, Forwards LER 80-009/03L-0 & Updated LER 80-005/01T-1 ‎ (← links)
  • 05000409/LER-1980-010, Forwards LER 80-010/03L-0 ‎ (← links)
  • 05000409/LER-1981-004-03, /03L-0:on 810309,during Condition 3,480-volt Diesel Bldg Essential Switchgear Bus 1B Was Energized from 1B Emergency Diesel Generator for Approx 25 Minutes W/Control Power Key in on Position ‎ (← links)
  • 05000409/LER-1981-004, Forwards LER 81-004/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000409/LER-1981-007-01, /01T-0:on 810601,during Initial Integrated Sys Test W/Plant Shut Down,Emergency Svc Water Supply Sys Did Not Produce 900 Gpm at 90 Psig,As required.Three-way Distributor Fabricated.Sys Retested Satisfactorily ‎ (← links)
  • 05000409/LER-1981-007, Forwards LER 81-007/01T-0 ‎ (← links)
  • 05000409/LER-1980-015-01, /01T-0:on 801129,containment Isolation Did Not Meet Test criteria.As-found Leakage Rate for Retention Tank Pump Discharge Valve 54-25-006 Was 0.56 - 4.0 Scfh.Cause Unstated.Gaskets Replaced & New Packing Installed ‎ (← links)
  • 05000409/LER-1980-014-01, /01T-0:on 801127,containment Isolation Did Not Meet Test criteria.As-found Leakage Rate for Condensate Return Isolation Valve 73-25-021 Was 14.3 Scfh.Cause Not Stated.Valve Internals Totally Replaced ‎ (← links)
  • 05000409/LER-1980-011-01, /01T-0:on 801110,cooldown Rate Exceeded Tech Spec Limit of 150 F Per/H at Five Points on Reactor Vessel.Caused by Temp Differential Between Coolant & Upper Portion of Vessel.Water Level Lowered to Slow Cooldown Rate ‎ (← links)
  • 05000409/LER-1980-011, Forwards LER 80-011/01T-0 ‎ (← links)
  • 05000409/LER-1980-017-01, /01T-0:on 801216,crane Reactor Cavity Purge Check Valve & Bs&B Reactor Vent Header Valve Found Leaking.Caused by Rust & Debris.Valves Replaced ‎ (← links)
  • 05000409/LER-1980-017, Forwards LER 80-017/01T-0 ‎ (← links)
  • 05000409/LER-1980-012-03, /03L-0:on 801124,soil Sample Under Feedwater Heater Area of Turbine Bldg Found Slightly Contaminated. Caused by Drilling Hole in Bldg Floor or When Floor Was Washed Prior to Grouting.Surveillance Program Established ‎ (← links)
  • 05000409/LER-1980-012, Forwards LER 80-012/03L-0 ‎ (← links)
  • 05000409/LER-1980-013-03, /03L-0:on 801127,during Periodic Leakage Rate Testing,Electrical Penetration Unit 6 Was Determined to Exceed Tech Specs Limits.Caused by Cracked Gland on Individual Penetration 29B.Gland Was Soldered ‎ (← links)
  • 05000409/LER-1980-013, Forwards LER 80-013/03L-0 ‎ (← links)
  • 05000409/LER-1980-007-03, /03L-0:on 800816,during Reactor Shutdown,Indicated Alpha Activity of Primary Coolant Sample Exceeded Tech Specs.Caused by Degraded Fuel Cladding.Primary Purification Sys Operation Reduced Concentration to Allowable Value ‎ (← links)
  • 05000409/LER-1980-006-03, /03L-0:on 800814,during Reactor Shutdown,Indicated Alpha Activity of Primary Coolant Sample Exceeded Tech Specs.Caused by Degraded Fuel Cladding.Primary Purification Sys Operation Reduced Concentration to Allowable Value ‎ (← links)
  • 05000409/LER-1980-008-03, /03L-0: 800819,1B High Pressure Svc Water Diesel Did Not Start on Manual Activation.Diesel Did Start Locally from Battery Banks.Caused by Bad Cell in One B Bank Battery. Battery Replaced ‎ (← links)
  • 05000409/LER-1980-008, Forwards LER 80-008/03L-0 ‎ (← links)
  • 05000409/LER-1980-005-01, /01T-0:on 800806,during Operation,Valve Addition to Shutdown Condenser Shell Gauge Tap Found W/O Design Change.Caused by Personnel Error.Valve Was Removed.Pipe Cap Was Installed & Tested W/Acceptable Results ‎ (← links)
  • 05000409/LER-1980-005, Forwards LER 80-005/01T-0 ‎ (← links)
  • 05000409/LER-1980-004-03, /03L-0:on 800417,during Tech Spec 5.2.6 Testing, While shutdown,1A Reactor Emergency Flooding Vent Bs&B Valve 79-19-9 Did Not Open.Probably Caused by Infrequent Cycling.Valve Relapped & Tested Satisfactorily ‎ (← links)
  • 05000409/LER-1980-004, Forwards LER 80-004/03L-0 ‎ (← links)
  • 05000409/LER-1980-003-01, /01T-0:on 800417,during Type C Leakage Testing, Containment Isolation Did Not Meet Test Criteria.Seal Rings Which Exhibited Aging Due to Normal Wear replaced.Post-maint Leakage Rate Test on 800425 Exhibited Zero Leakage ‎ (← links)
  • 05000409/LER-1980-002-01, /01T-0:on 800415,during Type C Leakage Testing, Containment Isolation Did Not Meet Test Criteria.Seat Ring on Upstream Containment Ventilation Isolation Exhaust Damper 73-25-005 Replaced & Leakage Rate Retested ‎ (← links)
  • 05000409/LER-1980-001-01, /01T-0:on 800409,during Periodic Leakage Rate Testing,Electrical Penetration Units 3,4, & 5 Did Not Meet Type B Test Criteria.Caused by Cracked Penetration Glands.Individual Penetrations Replaced ‎ (← links)
  • 05000409/LER-1980-001, Forwards LER 80-001/01T-0 ‎ (← links)
  • 05000409/LER-1979-009-03, /03L-0 on 790507:while Reactor Plant 125 Volt Dc Battery Was Removed for Maint,Control Power Key Switch Turned On.Procedural Change Will Be Initiated Requiring Use of Info Tag on Key Switch ‎ (← links)
  • 05000409/LER-1979-009, Forwards LER 79-009/03L-0 ‎ (← links)
  • 05000409/LER-1978-014-03, /03L-0 on 781215:during Routine Surveillance Test on 1B Emergency Diesel Generator,Unit Tripped on Indicated Overspeed.Problem Duplicated 781218 & Unit Declared Inoperable.Due to Erroneously Set Switch Setpoint ‎ (← links)
  • 05000409/LER-1978-014, Forwards LER 78-014/03L-0 ‎ (← links)
  • 05000409/LER-1979-008-03, /03L-0 on 790429:during Periodic Type C Leakage Rate Testing,Containment Isolation Did Not Meet Tech Spec Criteria.Caused by Damper Disc Shaft Packing.Replaced W/Chevron Type Asbestos Composition Shaft Packing ‎ (← links)
  • 05000409/LER-1979-008, Forwards LER 79-008/03L-0 ‎ (← links)
  • 05000409/LER-1979-004-01, /01T-0 on 790119:indicated Leak Rate for Demineralized Water Isolation Valve Was 0.597 Std Cubic Ft/H.Caused by Normal Surface Wear.Valve Repaired & Now Complies W/Type C Test Criteria ‎ (← links)
  • 05000409/LER-1979-003-01, /01T-0 on 790118:indicated Leakage Rate for Seal Injection Sys Makeup Valve Was 0.684 Std Cubic Ft/H.Cause Unknown.Valve Repaired,Now Complies W/Type C Test Criteria ‎ (← links)
  • 05000409/LER-1979-010-03, /03L-0 on 790522:during Reactor Shutdown,Gross Alpha Activity of Primary Coolant Exceeded Tech Specs.Caused by Irradiated Fuel Matl in Rcs.Primary Purification Resins Replaced & Concentration Reduced ‎ (← links)
  • 05000409/LER-1979-010, Forwards LER 79-010/03L-0 ‎ (← links)
  • 05000409/LER-1979-001-01, /01L-0 on 790103:fuel Oil Samples from Tanks Indicated Water & Sediment Concentrations of 0.1%.Similar Occurrence RO-76-15.Tanks Resampled at 3 Elevations Prior to Partial Purging W/Levels Below 0.2% ‎ (← links)
  • 05000409/LER-1979-001, Forwards LER 79-001/01L-0 ‎ (← links)
  • 05000409/LER-1979-002-01, /01T-0 on 790115:periodic Leakage Rate Testing Revealed Electrical Penetration Units 3,4 & 6 Did Not Meet Type C Test Criteria.Imbrittlement of Epoxy Sealant Contributed to Leaks.Repaired W/Reapplication of Epoxy ‎ (← links)
  • 05000409/LER-1979-002, Forwards LER 79-002/01T-0 ‎ (← links)
  • 05000409/LER-1979-014-03, /03L-0 on 790708:during Power Escalation,Control Rod 10 Was Withdrawn Rather than Control Rod 12,placing Rods in out-sequence Condition.Caused by Operating Personnel Error.Compliance W/Program to Be Emphasized ‎ (← links)
  • 05000409/LER-1979-014, Forwards LER 79-014/03L-0 ‎ (← links)
  • 05000409/LER-1979-013-03, /03L-0 on 790704:during Reactor Power Escalation, Piston Rod Seal Failure on Turbine Main Steam Bypass Valve Operating Cylinder Resulted in Loss of Hydraulic Oil.Caused by Normal Wear of Seal.Seals & Oil Replaced ‎ (← links)
  • 05000409/LER-1979-013, Forwards LER 79-013/03L-0 ‎ (← links)
  • 05000409/LER-1979-018-01, /01T-0:on 791214,util Notified by Allis-Chalmers That Containment Isolation Dampers Require Repositioning to Ensure Full Closure.Cause Not Stated.Dampers Closed Pending Allis-Chalmers Analysis.Ler to Be Updated ‎ (← links)
  • 05000409/LER-1979-018, Forwards LER 79-018/01T-0 ‎ (← links)
  • 05000409/LER-1979-011-03, /03L-0 on 790601:upscale Scram Setpoint on Power Range Nuclear Instrument Channel 6 Exceeded 120% Limit of Rated Thermal Power by 1.8%.Caused by Setpoint Drift of Undetermined Origin.Scram Setpoint Reset ‎ (← links)
  • 05000409/LER-1979-011, Forwards LER 79-011/03L-0 ‎ (← links)
  • 05000409/LER-1979-012-03, /03L-0 on 790702:during Operation,Test Revealed Pump A1 Failed to Start Upon Manual Actuation of Control Room Switch.Caused by Electrical Short Causing Diodes to Burn Out & Fuel Valve to Remain Closed.Diodes Replaced ‎ (← links)
  • 05000409/LER-1979-012, Forwards LER 79-012/03L-0 ‎ (← links)
  • 05000409/LER-1979-017-01, /01T-0:on 791109,reactor Vessel Cooled Down at Rate Exceeding Tech Specs During Reactor Scram.Caused by Turbine Governor Problem Resulting in Power to Flow Scram. Turbine Governor Sys Inspected & Flushed ‎ (← links)
  • 05000409/LER-1979-017, Forwards LER 79-017/01T-0 ‎ (← links)
  • 05000409/LER-1979-015-03, /03L:on 790822,during Normal Operation,Auxiliary Operator Commenced Pumping Retention Tank 1B to River,Rather than Sampling 4,500 Gallon Waste Tank.Pumping Stopped & Tank Sampled.No Radiological Release Limits Exceeded ‎ (← links)
  • 05000409/LER-1979-015, Forwards LER 79-015/03L-0 ‎ (← links)
  • 05000409/LER-1979-016-01, /01T-0:on 790907,during Low Recirculation Flow Scram,Bypass Key Switches Were Not Turned to Normal Position as Required by Tech Specs.Caused by Personnel Error.Addl Training Administered ‎ (← links)
  • 05000409/LER-1979-016, Forwards LER 79-016/01T-0 ‎ (← links)
  • 05000409/LER-1995-001, :on 950417,noted That HPSW to Containment Building Isolated.Caused by Momentary LOP Due to Operational Test of 1A Edg.Procedures for Test Being Modified to Include Instructions to Verify Value Being Open ‎ (← links)
  • 05000409/LER-1981-001, Forwards LER 81-001/02L-0 ‎ (← links)
• 05000409/LER-1982-019-03, /03L-0:on 820927,during Power Escalation Following Refueling Outage,Water Level Safety Channel 3 Determined Nonconservative W/Respect to Possible Low Water Level Condition.Caused by Transmitter Drift.Channel Adjusted ‎ (← links)
• 05000409/LER-1982-019, Forwards LER 82-019/03L-0.Detailed Event Analysis Submitted ‎ (← links)