Pages that link to "05000312/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted"

The following pages link to 05000312/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted:

Displayed 38 items.

• 05000312/LER-1982-014, Forwards LER 82-014/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-013, Forwards LER 82-013/04T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-014-03, /03L-0:on 820619,pressurizer Liquid Sample Valve, SFV-70001,opened Properly But Failed to Close Properly on Command.Caused by Ax Relay Not Responding to Close Command. Relay Replaced ‎ (← links)
• 05000312/LER-1982-013-04, /04T-0:on 820607,during Chlorination of Nuclear Svc Spray Pond,Spray Pond Filters Went Into Backwash Mode. Cause Not Stated.Several Fish in Discharge Stream Killed Due to Excessive Chlorine.Chlorine Injection Point to Be Mov ‎ (← links)
• 05000312/LER-1982-009-01, /01T-0:on 820405,radiographic & Ultrasonic Exam of High Pressure Injection Nozzles Revealed Unacceptable Condition in a & B Nozzles.Cause Not stated.Safe-ends Will Be Replaced W/New Design ‎ (← links)
• 05000312/LER-1982-009, Forwards LER 82-009/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-012-03, /03L-0:on 820505,during Cold Shutdown,A Decay Heat Pump Inboard Bearing Found Leaking Oil.Cause of Leak Undetermined.Probable Cause Due to Partial Seal Failure.Leak Will Be Repaired ‎ (← links)
• 05000312/LER-1982-012, Forwards LER 82-012/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-010-01, /01T-1:on 820419,insp of B once-through Steam Generator Auxiliary Feedwater Header Ring & a Ring on 820420 Revealed Deformations.Mod Work to Correct Problem Partially Scheduled.Old Header Will Be Stabilized ‎ (← links)
• 05000312/LER-1982-010, Forwards LER 82-010/01T-1.Optimum Repair Schedule Encl ‎ (← links)
• 05000312/LER-1982-011-03, /03L-0:on 820415,check Valve CBS-022 on B Tank Supply to B Pump Found Stuck Closed.Caused by Chemical Deposit Buildup.Check Valves Cleaned,Reground & Returned to Svc ‎ (← links)
• 05000312/LER-1982-011, Forwards LER 82-011/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-008-04, /04T-0:on 820121,plant Effluent Ph Found to Be High (8.6-8.7) for Approx 5 Minutes.Caused by Instrument Error.Rh & Delta TC Probes Replaced ‎ (← links)
• 05000312/LER-1982-008, Forwards LER 82-008/04T-0 ‎ (← links)
• 05000312/LER-1982-005-03, /03L-0:on 820211,B Diesel Generator Found Inoperable.Caused by Output Breaker lock-out Due to Reverse Power Trip.Relays Marked to Improve Identification of Flag Targets,Personnel Trained & lock-out Alarm Moved ‎ (← links)
• 05000312/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-004-03, /03L-0:on 820209,reactor Protection Sys Channel C Pressure Transmitter Read 15 Psi High.Caused by Calibr of Transmitter During Artificial Cooling of Ambient Temp by Emergency Cooler.Input Buffer Amp Bias Changed ‎ (← links)
• 05000312/LER-1982-004, Forwards LER 82-004/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-006-04, /04T-0:on 820305,during Review of Plant Effluent Records,Discovered That Ph Limit Was Exceeded on 820219. Caused by Sample Sys Configuration for Regenerate Hold Up Tank Discharging Into Plant Waste Stream.Sys Modified ‎ (← links)
• 05000312/LER-1982-007-04, /04T-0:on 820305,monthly Review of Plant Effluent Records Revealed Plant Effuent Chlorine Limit Exceeded for Period of 2.5-hr on 820217.Caused by Analyst Failing to Take Sample at Site Boundary.Analysis Reinstructed ‎ (← links)
• 05000312/LER-1982-006, Forwards LER 82-006/04T-0 ‎ (← links)
• 05000312/LER-1982-007, Forwards LER 82-007/04T-0 ‎ (← links)
• 05000312/LER-1982-001-01, /01T-0:on 820130,both Doors on Airlock Opened Simultaneously Resulting in Loss of Containment Integrity. Caused by Personnel Error & Failure of Inner Door Mechanism to Latch Properly ‎ (← links)
• 05000312/LER-1982-003-01, /01T-0:on 820301,B HPI Pump Found to Be Inoperable Due to Leaving Dc Charging Motion for Closing Spring in Unenergized State.Probably Caused by Personnel Error or Improper Procedure.Addl Training Provided ‎ (← links)
• ML20042A854 (redirect page) ‎ (← links)
• 05000312/LER-1982-001 (redirect page) ‎ (← links)
  • 05000312/LER-1980-044, Forwards LER 80-044/01T-0 ‎ (← links)
  • 05000312/LER-1979-022, Forwards LER 79-022/01T-0 ‎ (← links)
  • 05000312/LER-1978-003, Forwards LER 78-003/04T-0 ‎ (← links)
  • 05000312/LER-1978-012, Forwards LER 78-012/03L-0 ‎ (← links)
  • 05000312/LER-1978-009, Forwards LER 78-009/03L-0 ‎ (← links)
  • 05000312/LER-1978-013, Forwards LER 78-013/03L-0 ‎ (← links)
  • 05000312/LER-1978-006, Forwards LER 78-006/03L-0 ‎ (← links)
  • 05000312/LER-1978-004, Forwards LER 78-004/01T ‎ (← links)
  • 05000312/LER-1979-008, Forwards LER 79-008/03L-0 ‎ (← links)
  • 05000312/LER-1980-013, Forwards LER 80-013/03L-0 ‎ (← links)
  • 05000312/LER-1980-014, Forwards LER 80-014/03L-0 ‎ (← links)
  • 05000312/LER-1979-024, Forwards LER 79-024/03L-0 ‎ (← links)
  • 05000312/LER-1978-015, Forwrds LER 78-015/01T-0 ‎ (← links)
  • 05000312/LER-1978-016, Forwards LER 78-016/01T-0 ‎ (← links)
  • 05000312/LER-1987-035, Corrected Page 1 to LER 87-035-00:on 870625,during Startup Test Procedure 199 Continuous Fire Watch Abandoned from Monitoring Alarm Panel H4FCP5 for 3 H.Caused by Uncontrolled Discharges of Carbon Dioxide Exposing Personnel to ‎ (← links)
  • 05000312/LER-1987-031, Forwards Rev 1 to LER 87-031,stating That Proposed Tech Spec Amend 158 Will Provide Controls for Hydrogen Recombiner Sys & Surveillance Procedures SP.45A & SP.45B Will Replace Procedure SP.201.08 ‎ (← links)
  • 05000312/LER-1986-020, Forwards Rev 3 to Procedure AP.56, Core Damage Assessment, for Inclusion in NRC Review of post-accident Sampling Sys. Procedure Revised to Correct Discrepancy Noted in LER 86-20 ‎ (← links)
  • 05000312/LER-1989-005, Forwards LER 89-005-01 Re Potential Inoperability of Flow Transmitters Due to Unqualified Configuration W/Plastic Conduit Opening Plugs.As Discussed in Util Completion Date for Corrective Actions Extended to 891215 ‎ (← links)
  • 05000312/LER-1986-014, Updates Re Correction of Degraded DHR Capability Reported in LERs 86-02 & 86-14.Decay Heat Sys a Pump Casing Drain Lines Replaced Per Design Mod Package ECN R-0498. LER 86-14 Will Be Revised by 861208 to Reflect Mod ‎ (← links)
  • 05000312/LER-1980-045, Forwards LER 80-045/01T-0 ‎ (← links)
  • 05000312/LER-1982-014, Forwards LER 82-014/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-013, Forwards LER 82-013/04T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1989-010, :on 890821,when Performing Surveillance Procedure SP.452,technicians Neglected to Input Default Flow Rate Value.Caused by Personnel Error.Training Conducted for Technicians Re Surveillance Procedures ‎ (← links)
  • 05000312/LER-1989-002, :on 890228,DHR Sys Dropline Isolation Valve Closed Automatically on High RCS Pressure Signal,Resulting in Temporary Loss of DHR Capability.Caused by Pressure Transmitter Out of Calibr.Loop Recalibr ‎ (← links)
  • 05000312/LER-1989-001, :on 890131,auxiliary Feedwater Pump P-318 Reached Overspeed Condition Resulting in Overpressurization of Auxiliary Feedwater Trains.Caused by Failure of Turbine Governor to Control Turbine Speed ‎ (← links)
  • 05000312/LER-1989-005, :on 890218,discovered That Six Essential Flow Transmitters in Auxiliary Feedwater Sys Had Plastic Plugs Installed in Spare Conduit Connection Opening.Plastic Plugs Replaced W/Metal Plugs ‎ (← links)
  • 05000312/LER-1988-010, :on Four Occasions Between 880719-28,fire Wraps Removed from Conduit B-40034 Without Required Firewatch. Caused by Miscommunication Between Plant Mods Group & Fire Protection Coordinator.Hourly Firewatches to Be Conducted ‎ (← links)
  • 05000312/LER-1989-009, :on 890725,DHR Sys Inoperable in Excess of Tech Spec Limit.Caused by Personnel Error & Absence of Procedural Barriers to Implement 1 H Limit.Special Order Issued & Procedures SP-30B & SP-32B Revised ‎ (← links)
  • 05000312/LER-1988-005, :on 880315 & 22,steam/water Transients Caused Relief Valves to Lift & Result in Discharge of Water from Letdown Sys to Reactor Bldg Sump.Caused by Pressure Spike Due to Acceleration Slug of Water ‎ (← links)
  • 05000312/LER-1989-008, :on 890720,discovered That Alternate Sampling Equipment Connected to Operable Reactor Bldg Duct & Not to Auxiliary Bldg Stack.Caused by Chemistry Technician Error. Sampling to Auxiliary Stack Reinstated ‎ (← links)
  • 05000312/LER-1989-007, :on 890518,discovered That Auxiliary Bldg Stack Monitor in Purge Mode.Caused by Deviation from Procedures on 890424,25 & 28.Procedures Revised to Add Precaution That Method Should Not Be Used to Terminate Purge ‎ (← links)
  • 05000312/LER-1989-004, :on 890328,plant Main Feedwater Pumps (MFP) Experienced Speed Control Problems.Because of MFP Controller Problems,Integrated Control Sys Response Caused post-trip. Test Program Established to Monitor Pump ‎ (← links)
  • 05000312/LER-1989-003, :on 890112,potential Inoperability of safety- Related motor-operated Valves Noted.Caused by Unqualified Torque Switches.Corrective Action Included Torque Switch Replacement Schedule.Part 21 Related ‎ (← links)
  • 05000312/LER-1988-021, :on 880615,potential Loss of Equipment Necessary to Mitigate Consequences of Accident Due to Postulated Implosion of Junction Boxed Noted.Caused by Failure to Apply Changes.Weepholes Installed ‎ (← links)
  • 05000312/LER-1986-029, :on 861204,dilution of Noble Gas Monitor Samples Occurred Due to Two Open Sample Valves on Auxiliary Bldg Stack Exhaust Sample Line.Caused by Personnel Error. Monitor Rendered Inoperable ‎ (← links)
  • 05000312/LER-1986-028, :on 861121,auxiliary Bldg Stack Noble Gas Monitor Samples Not Representative of Effluent Activity. Caused by Failed Closed Instrument Air Solenoid Purge Valve Relay.Relay Replaced & Monitor Returned to Svc ‎ (← links)
  • 05000312/LER-1987-022, :on 870729,diesel Cooling Water Leakage Observed During Monthly Diesel Generator Synchronization Surveillance Test.Caused by Shaft Seal Leak on Engine Driven Cooling Water Pumps.Pump Replaced ‎ (← links)
  • 05000312/LER-1987-038, :on 870715,decay Heat Pump a Tripped Due to Closure of Pump Suction Valve HV-20002.Caused by Contractor Electrician Lifting Wire That Provided Indication to Valve Control Circuit.Valve Reopened ‎ (← links)
  • 05000312/LER-1987-047, :on 871124,failure to Conduct Continuous Purge Sample During Reactor Bldg Purge Noted.Caused by Personnel Error.Hvac Procedures Revised to Incorporate Precautions & Purge Sample Initiated ‎ (← links)
  • 05000312/LER-1987-045, :on 871105,surveillance Procedure for Weekly Battery Testing Not Performed by Tech Spec Required Date. Caused by Personnel Error.Manual Tracking Schedule for Surveillance Procedures Instituted ‎ (← links)
  • 05000312/LER-1987-044, :on 871110,concern Raised Re Potential Loss of Nuclear Svc Electrical Bldg Essential HVAC During Seismic Event.Caused by Design Error.Isolation Dampers Will Be Changed to normal-open fail-closed Logic ‎ (← links)
  • 05000312/LER-1987-041, :on 871026,design Review Revealed Potential for Class 2 Level Switches to Trip Nuclear Svc Cooling Water Pumps During Seismic Event.Cause Under Investigation.Trip Switch Will Be Removed from Circuitry ‎ (← links)
  • 05000312/LER-1986-016-02, Errata to LER 86-016-02:on 861003,decay Heat Sys Pump B Tripped Due to Abnormal Indication on Panel H2SFB Causing Bistable B Trip & HV-20002 to Close.Caused by Arc in Sump Level Indicator.Indicators Will Be Repainted ‎ (← links)
  • 05000312/LER-1987-036-01, Errata to LER 87-036-01:on 870608,discovered That Pipe Supplying Water for Bearing Cooling for Reactor Bldg Spray Pump Blocked.Preventive Maint Procedure for Pump Bearing Cooling Water Supply & Return Lines Instituted ‎ (← links)
  • 05000312/LER-1987-036, :on 870608,pipe Supplying Water for Bearing Cooling for Reactor Bldg Spray Pump B Completely Blocked. Caused by Accumulation of Rust & Dirt Via Nuclear Svc Raw Water Sys.Water Lines Cleaned ‎ (← links)
  • 05000312/LER-1986-016, :on 861003,decay Heat Sys (DHS) Tripped Causing HV-20002 to Close.Caused by Arc That Occurred When Personnel Troubleshooting Abnormal Indication on Panel H2SFB for Dhs. Lens Clips Will Be Repainted or Replaced ‎ (← links)
  • 05000312/LER-1987-013, :on 870204 & 06,discrepancies in Routing of Instrumentation Cables & Cable & Raceway Tracking Sys Discovered.Caused by Personnel Error.Nonconforming Rept S-6374 Issued to Remedy App R Violation ‎ (← links)
  • 05000312/LER-1987-037, :on 870629,makeup Tank (Mut) Level Inadvertently Increased to 90 Inches,Violating Tech Spec 3.2.2.Caused by Opening of Valve SFV-25003.Discussion W/ Operations Personnel Planned to Correct Error ‎ (← links)
  • 05000312/LER-1988-017, :on 881206,discovered That Diesel Fuel Oil Storage Tank a Instead of Tank B Sampled.Caused by Use of Informal Method of Communication & Failure of Training Program.Potential Deviation Rept Prepared ‎ (← links)
  • 05000312/LER-1987-006-03, Forwards LER 87-006-03.Rev Incorporates Commitment to Address Assessment of Safety Consequences for motor-operated Valve as-found Configuration.Final Rept Will Be Submitted within 60 Days or by 880114 ‎ (← links)
  • 05000312/LER-1987-043, :on 870924,improper Monitoring of New Effluent Release Point Occurred.On 871005,air Sample Cartridge Not Delivered for Analysis Due to Fan A-546 Being Off.Events Caused by Personnel Error.Air Samples Taken ‎ (← links)
  • 05000312/LER-1987-015, :on 870207,numerous Cardox Zones Observed Deactivated When No Safety Concern for Personnel Noted. Caused by Personnel Not Reactivating Zone After Concern Resolved.Hourly Verification Initiated & Procedure Revised ‎ (← links)
  • 05000312/LER-1987-042, :on 870912,technician Detected Electrical Problems W/Amphenol Blue Ribbon Connectors.Caused by Coating of Residue from Solder Flux,Organic Matls & Plasticizers. Nonconforming Rept Procedure Revised ‎ (← links)
  • 05000312/LER-1988-020, :on 881215 & 16,discovered Core Flooding Tank Daily Pressure Below Tech Spec Limit.Caused by Personnel Error.Pressure Restored to within Tech Spec Limits.Procedure LDAP-0012 Will Be Revised ‎ (← links)
  • 05000312/LER-1985-028, :on 851030,control Room Operator Noticed That Auxiliary Pump P-319 Started Automatically.Exact Starting Time Could Not Be Confirmed.Caused by Low Main Feedwater Discharge Pressure ‎ (← links)
  • 05000312/LER-1985-027, :on 851214,licensee Discovered That Testing Requirements for Containment Personnel Air Lock Seals Not in Accordance W/Tech Spec 4.4.1.2.5.(c).Caused by Technicians Not Adhering to Procedures.Retest Conducted on 851216 ‎ (← links)
  • 05000312/LER-1985-026, :on 850910,diesel Generators a & B Declared Inoperable.Diesel Generator B Failed to Start.Diesel Generator a Removed from Svc for Troubleshooting.Diesel Generator B Capable of Performing Intended Function ‎ (← links)
  • 05000312/LER-1987-034, :on 870602,make-up & Two High Pressure Injection Pumps Declared Inoperable.Caused by Improper Classification of Min Flow Recirculation Lines.Design Package to Upgrade Lines Will Be Prepared ‎ (← links)
  • 05000312/LER-1987-012, :on 870112,rept Written Re Failure to Perform Surveillance Procedure SP.711 by Tech Spec Required Date. Caused by Personnel Error.Manual Calendaring Sys Changed for Scheduling of Surveillances ‎ (← links)
  • 05000312/LER-1987-039, :on 870826,licensee Failed to Conspicuously Post Reactor Head Laydown Area as high-radiation Area.Caused by Personnel Error.Reactor Head Laydown Area Posted & Surveys Taken ‎ (← links)
  • 05000312/LER-1987-033, :on 870529,11 Hourly Fire Watches Required by Tech Specs Missed.Caused by Unexpected Demand on Available Manpower Due to Breakdown in Security Computer Sys.Fire Watch Pool Will Be Established ‎ (← links)
  • 05000312/LER-1987-030, :on 870529,due to Concurrent Work on Radiation Monitors R15049 & R15050,number of Operable Channels to Trip Reactor Bldg Purge Sys Reduced to Zero.Caused by Cognitive Personnel Error.Personnel Trained ‎ (← links)
  • 05000312/LER-1987-040, :on 870817,discovered That Source Daily Check During Releases Via Regenerant Tank Pathway Not Performed Per Tech Specs.Caused by Inadequate Tech Spec Review. Procedures Revised & Temporary Changes Made ‎ (← links)
  • 05000312/LER-1987-032, :on 870526 & 0614,PORV Isolation Valve Stroke Tested,Rendering Low Temp Overpressure Protection Inoperable,Contrary to Tech Spec 3.2.2.1.Caused by Deficient Procedure.Procedure Will Be Revised ‎ (← links)
  • 05000312/LER-1986-029-01, Forwards LER 86-029-01.Completion Date for Suppl to LER Delayed Until Aug 1987 Due to Expansion of Root Cause Investigation to Include All Previous Similar Events ‎ (← links)
  • 05000312/LER-1986-023, :on 861111,inadequate Voltage Supplies Sent to Control Room/Technical Support Center HVAC Under Certain Worst Case Conditions.Caused by Inadequate Engineering Review.Ecn R-0911 Written ‎ (← links)
  • 05000312/LER-1986-024, :on 861115,during Fuse Replacement Activity in Bus Inverter S1A,power Momentarily Interrupted & DHR Train a Tripped.Caused by Design Not Allowing for Testability Using Substitute Power Source ‎ (← links)
  • 05000312/LER-1987-028, :on 870514,diesel Generator B Automatically Started.Caused by Overvoltage Sensed by Emergency Power Supply Sys from Switchyard.Rev 2 to Proposed Tech Spec Amend 147 Submitted to Enhance Controls ‎ (← links)
  • 05000312/LER-1987-017, :on 870209 & 0320,discrepancies in Local Leak Rate Test (LLRT) Discovered.Caused by Personnel Error.Tech Specs,Updated Sar,Integrated Leak Rate Tests & LLRT Will Be Revised to Reflect Addl Test Requirements ‎ (← links)
  • 05000312/LER-1985-001, :on 850124,operations Personnel Found Hydrogen Monitor Sys Containment Isolation Valves Open.Caused by Tagging Inconsistency.Cover Panels added.Post-accident Sampling Sys Operation Procedure Revised ‎ (← links)
  • 05000312/LER-1987-016, :on 870206,discovered That Cable Pulls Made Into safety-related Breaker Cubicle Cabinets for Both Trains of Emergency Electrical Power Left for Several Wks Causing Invalid Seismic Analysis.Caused by Const Error ‎ (← links)
  • 05000312/LER-1987-014, :on 870204,12 & 13,deficiencies in Inservice Insp Procedures in Violation of Tech Spec 4.2.2.1 Discovered.Caused by Personnel Error.Missed Valve Insp Conducted.Procedure Development Underway ‎ (← links)
  • 05000312/LER-1986-031, :on 860804,hourly Instead of Continuous Fire Watch Performed.Caused by Operator Error.Fire Protection Coordinator Will Establish Agreed Upon Terminology for Fire Staff to Use When Communicating ‎ (← links)
  • 05000312/LER-1986-013, :on 860630,0706,22 & 23,CR/TSC Essential HVAC Sys a & B Autostarted.Incidents Part of Recurring Problems W/Design,Control & Operation of Cr/Tsc Essential HVAC Sys.W/ ‎ (← links)
  • 05000312/LER-1986-012, :on 860606 & 09,while in Cold Shutdown,Two Snubbers Removed from Operating Decay Heat Sys.Caused by Personnel Error.Snubbers Reinstalled & Planned Work on Snubbers Delayed Until Decay Heat Sys Outage ‎ (← links)
  • 05000312/LER-1987-010, :on 870119,electrical Configuration for RCS High Point Valves Found in Noncompliance w/10CFR50,App R. Caused by Inadequate Assessment of Hot Short Effects.Design of Valves Will Be Modified,Per 10CFR50,App R ‎ (← links)
  • 05000312/LER-1987-004, :on 870114,fire Watch Prematurely Removed in Violation of Tech Specs.Caused by Central Alarm Station Operator Error.Operator Removed from Duties & Assigned as Field Sergeant as Disciplinary Measure ‎ (← links)
  • 05000312/LER-1987-005, :on 870113,condensate Storage Tank Level Instrument Used to Determine Auxiliary Feedwater Pump Capacities During Periodic Surveillance Testing Not Adequately Calibr.Cause Not Stated ‎ (← links)
  • 05000312/LER-1987-003, :on 870120,welding Work Performed in Fire Zones 13 & 75 Required Continuous Fire Watch Post,But Only Hourly Fire Watch Performed by Fire Protection Staff.Caused by Personnel Error.Personnel Involved Reprimanded ‎ (← links)
  • 05000312/LER-1987-008, :on 870115,discovered Inadequate Sequencing of Diesel Generator High Pressure Pumps During Automatic Loading.Caused by Design Error.Design Control Procedures Implemented ‎ (← links)
  • 05000312/LER-1987-001, :on 870117,fire Zone Detection & Suppression Sys Disabled for Grinding Work & Hourly Fire Watch Instituted Instead of Continuous Fire Watches.Caused by Failure to Follow Procedure ‎ (← links)
  • 05000312/LER-1987-009, :on 870116 Inoperable Radiation Monitors for Reactor Coolant Leakage Detection Sys,Since Initial Startup in 1974 Discovered.Caused by Procedural Deficiency.Present Radiation Monitors R-15001A - E Being Replaced ‎ (← links)
  • 05000312/LER-1987-002, :on 870108,determined That One Area in Existing Plant Electrical Distribution Sys in Noncompliance W/ 10CFR50,App R.Caused by Original Design Error.Instructions Written & Corrective Design Mods Initiated ‎ (← links)
  • 05000312/LER-1986-016-01, Forwards LER 86-016-01.Diagnostic Test to Determine Direct Cause of Decay Heat Sys Pump Trip Following Arc in Sump Level Indicator Will Be Completed in 45 Days.Supplemental LER Will Be Completed in Jul 1987 ‎ (← links)
  • 05000312/LER-1985-009, :on 850530,diesel Generator B Failed to Follow Normal Shutdown Sequence When Stop Button on Safety Features Control Panel Pressed.Caused by 4,160-volt Safety Bus Undervoltage Condition.Time Delay Relay Added ‎ (← links)
  • 05000312/LER-1986-015, :on 850921,two Trace Solder Pads Dislodged from Component Side of Printed Circuit Board.Dislodged Solder Pads Caused Nonconforming Rept to Be Written.Guidance Will Be Prepared for Technicians ‎ (← links)
  • 05000312/LER-1987-020, :on 870212,discovered New Locations for Garden & Residence Not Added to Radiological Environ Monitoring Program within 30 Days of Identification.Caused by Personnel Error.Program Updated ‎ (← links)
  • 05000312/LER-1987-019, :on 870213,fire Watch Not Upgraded When Fire Detection Sys Removed from Svc.Caused by Personnel Error. Special Order 87-15 Issued to Clarify Procedures ‎ (← links)
  • 05000312/LER-1986-032, :on 861218,hourly Fire Watch for Fire Zone 39 Missed for 1 H While CO2 Sys Inoperable Due to Hole Being Drilled Through Wall for Conduit Installation.Caused by Operations Error.Info Streamlined ‎ (← links)
  • 05000312/LER-1986-033, :on 861220,local Continuous Sampling Device on Reactor Bldg Not Operating Due to Loss of Power Receptacle. Caused by Overuse of Receptacle.Similar Event Occurred on 861223.Outlets Tagged ‎ (← links)
  • 05000312/LER-1985-016-01, Corrected Pages of Rev 1 to LER 85-016-01 ‎ (← links)
  • 05000312/LER-1986-030, :on 861208,decay Heat Sys Isolation Occurred During Transfer of Source Transformer.Caused by Personnel Error & Inadequate Procedure.Personnel Counseled & Procedures Revised ‎ (← links)
  • 05000312/LER-1986-011, :on 860424,during Visual Insps of Internal Wiring Terminations,Seven Internal Compression Terminations Failed.Caused by Loose Conductor/Lug Assemblies in Bailey Cabinets.Maint Stds & Insp Plan Developed ‎ (← links)
  • 05000312/LER-1986-019, :on 860826,auxiliary Bldg Gas Radiation Monitor Declared Inoperable.Noble Gas Grab Sample Not Taken at Required Time.Caused by Assumption That Sample Taken Shortly After Monitor Declared Inoperable ‎ (← links)
  • 05000312/LER-1986-017, :on 860826,discovered That Plant Operated Outside Tech Specs Since 1983.Condition Could Have Caused Failure of Safety Sys Train in Event of Large Break Loca. Proposes Installation of Diesel Generators ‎ (← links)
  • 05000312/LER-1987-021, :on 861121,pressurizer Heater Bundles Damaged Following Heater Breaker Trips.Caused by Energization of Heaters W/O Adequate Water Level & Inadequate Administrative Controls.Root Cause Investigation 86-34 Issued ‎ (← links)
  • 05000312/LER-1987-013-01, :on 870204,discrepancy Discovered Between Routing of Instrumentation Cables 1Y3X210B1 & 1Y3X215A1 & Designated Routing Per Cable Raceway Tracking Sys (Crts).On 870206,five Addl Crts Discrepancies Noted ‎ (← links)
  • 05000312/LER-1988-014, :on 881025,Tech Spec Required Shutdown Due to RCS Leakage.Caused by Degradation of Two Valves Due to Svc in Rcs.Rcs Repaired by Seal Welding body-to-bonnet Joint, Then Injecting Valve W/Leak Sealant ‎ (← links)
  • 05000312/LER-1988-016, :on 881027,sample Flow to Radiation Monitor R-15546A Lost,Rendering Noble Gas Monitor & Particulate & Charcoal Samplers Inoperable.Cause Unknown.Sample Flow to Monitor Restored ‎ (← links)
  • 05000312/LER-1988-015, :on 881014,reactor Tripped Due to Grid Disturbance.Caused by Transmission Line Faults.Phase to Phase Fault Protection Extended Past Stagg Substation ‎ (← links)
  • 05000312/LER-1988-013, :on 880907,worker in 20 Ft Elevation Auxiliary Bldg Hallway Almost Gained Access to Miscellaneous Waste Tank Room Via Opening at Top of Room Wall.Radiation Protection Posted Area as High Radiation Point ‎ (← links)
  • 05000312/LER-1986-006, :on 860414,failure to Implement Fire Protection Deluge Sys 3-yr Flow Test Identified.Caused by Confusion Over Tech Spec Requirements.Spray Sys Reviewed.Procedures Reviewed for mods.Cross-reference List Revised ‎ (← links)
  • 05000312/LER-1987-007, :on 870117,power Supply Cutoff on High Current to Bailey 885 Auxiliary Relay Module Lamp Occurred.Caused by Power Supply Short Circuit.Engineering Change Notice Written to Reverse Wiring to Lamp Sockets ‎ (← links)
  • 05000312/LER-1987-009-01, Forwards LER 87-009-01.W/o Encl ‎ (← links)
  • 05000312/LER-1987-046, :on 871126,decay Heat Sys Valves Returned to Operable Status,Energized,Stroked & Left in Open Position. Caused by Failure to Perform Surveillance Procedure Properly.New Procedures Issued ‎ (← links)
  • 05000312/LER-1985-001-01, :on 850116,hydrogen Monitor Sys Containment Isolation Valves Open.Caused by Tagging Inconsistency, Inadequate Operating Procedure & Inadequate Panel Design. Procedure Revised & Cover Panel Added ‎ (← links)
  • 05000312/LER-1986-018, :on 860717,determined That Control Room Did Not Implement Compensatory Fire Protection Measures When Smoke Detectors Disabled for Welding Operations.Caused by Communication Problems.Memo Issued ‎ (← links)
  • 05000312/LER-1986-008, :on 860429,continuous Fire Watch for Breached Penetration Not Posted.Caused by Personnel Error.Training Program Being Conducted to Ensure All Fire Protection Group Members Trained in Fire Watch Requirements ‎ (← links)
  • 05000312/LER-1988-008, :on 880504,reactor Tripped Automatically on High Pressure.Caused by Mismatch of Reactor Power to Feedwater Flow.Process Stds Data Base Updated to Reflect Correct Adjustment Conditions & Setpoint ‎ (← links)
  • 05000312/LER-1978-016-01, /01T-0:on 781024,operability of a Diesel Generator Lost Due to Failure of Primary Fuses on the Voltage Regulators Control Power Circuit.Fuses Replaced,A Generator Tested Then Returned to Svc ‎ (← links)
  • 05000312/LER-1985-022, :on 851120,pressurized Sampling Valve HV-21516 Found in Open Position W/Breaker Racked Out.Caused by Lack of Administrative Control.Process Sampling Procedures & Operator Training Upgraded ‎ (← links)
  • 05000312/LER-1988-001, :on 880114,radiation Protection Discovered That Alpha Analysis Results for Reactor Bldg Purge 87-47 on 871226 Missing.Cause Unknown.Chemistry Personnel Conducted Thorough Search of Area ‎ (← links)
  • 05000312/LER-1988-011, :on 880806,dual-drive Auxiliary Feedwater Pump P-318 Shut Down Due to Outboard Packing Overheating.Caused by vendor-supplied Packing Being Dimensionally Incorrect.New Style of Packing Installed in Outboard Gland ‎ (← links)
  • 05000312/LER-1988-012, :on 880825,auxiliary Operator Failed to Use Procedure or Verify line-up W/Procedure.On 880827,valve CDS-558 Discovered Misaligned.Caused by Failure to Isolate Regenerate hold-up Tank a Prior to Release ‎ (← links)
  • 05000312/LER-1988-007, :on 880428,surveillance Procedure to Perform Weekly Breaker Alignment Verification of Vital Buses Found Deficient.Caused by Personnel Failure.Procedure SP.3,Rev 2 Issued on 880429 to Correct Deficiency ‎ (← links)
  • 05000312/LER-1988-006, :on 880414,potential Deviation from Quality Initiated to Rept Spurious Actuations of Control Room Technical Support Ctr Essential HVAC Sys.Caused by High Temp Indications.Temp Switch Changed ‎ (← links)
  • 05000312/LER-1988-009, :on 880721 & 25,penetrations Failed Acceptance Criteria & Did Not Receive Hourly Fire Watch & Penetrations Breached,Respectively.Caused by Personnel Error & Procedure Complexity.Procedure to Be Replaced ‎ (← links)
  • 05000312/LER-1988-004, :on 880302,surveillance Test Did Not Verify Automatic Termination of Release Pathway Resulting in Monitors Being Declared Inoperable.Caused by Inadequate Surveillance Procedures.Procedure Revised ‎ (← links)
  • 05000312/LER-1978-015-01, /01T-0:on 781120,failure of 9 Bergen-Patterson Snubbers.Seven of 9 Failures Caused by Abusive Handling During Reinstallation Following 1977 Testing.Other Two Failures Isolated Cases.Failed Units Repaired ‎ (← links)
  • 05000312/LER-1988-001-01, :on 870601,improperly Crimped Terminal Lugs on Two GE Motors Discovered During Overhaul of Ventilation Fan Motors.Caused by Mfg Defect.Discovery Documented & New Lugs Installed.Part 21 Related ‎ (← links)
  • 05000312/LER-1988-002, :on 880203,inadvertent Autostart of Emergency Diesel Generator a Occurred.Caused by Personnel Error.Bus 4A to Startup Transformer Paralleled & Emergency Diesel Generator a Shut Down ‎ (← links)
  • 05000312/LER-1987-048, :on 871228,discovered That Procedure Methodology Failed Adequately to Measure Actual Water Flow from Spray & Sprinkler Header.Caused by Misinterpretation of Tech Spec Requirements.Procedure Revised ‎ (← links)
  • 05000312/LER-1980-044-01, /01T-0:on 801031,IE Bulletin 79-01B Review Determined That No Qualification Documentation Available for Pressure Switches Utilized in Main Steam Sys.Cause Not Stated.New Sys Will Be Installed or Old Switches Replaced ‎ (← links)
  • 05000312/LER-1979-022-01, /01T-0:on 791217,Allis Chalmers Informed Util of Potential Problem W/Purge Valves & Recommended Limiting Valve Opening to Max of 60 Degrees Because Excess of 60 Degrees Could Cause Shaft Torsional Rating to Be Extended ‎ (← links)
  • 05000312/LER-1988-046, :on 871215,discovered That Surveillance Procedure 203.06 C/D Re DHR Valves Not Performed by Tech Spec Date.Caused by Personnel Error.Matrix Addressing Surveillance Procedures Will Be Developed ‎ (← links)
  • 05000312/LER-1978-003-04, /04T-0:on 780913,during Steady State Operation, Dissolved Oxygen Concentration Downstream of Confluence of Hadselville & Clay Creek Was Less than Minimum of 5mg/liter Typical of Stagnant Water.Location Is Beyond Util Propert ‎ (← links)
  • 05000312/LER-1978-012-03, /03L-0:on 780927,header Failed to Discharge During Routine Testing of CO2 Sys.Caused by Defective Microswitch on Solenoid Which Operates Pilot Valve Integral W/Main Isolation Valve Controller ‎ (← links)
  • 05000312/LER-1978-009-03, /03L-0:on 780913,diesel Driven Fire Pump P-996 Tripped on Overspeed During test.Engine-to-pump Coupling Bolts Were Discovered to Be Sheared,Probably Due to Overtorquing.Bolts Were Replaced,Torque Values Verified ‎ (← links)
  • 05000312/LER-1978-013-03, /03L-0:on 780925,HPI Loop a Flow Transmitter FT-23807 Found Inoperable During Surveillance Procedure 200.14.Caused by Broken Bellows in Flow Transmitter.Failed Bellows Replaced ‎ (← links)
  • 05000312/LER-1978-003-03, /03L-1 on 780710:Maintenance on Safety Sys Hydraulic Snubber Previously Found to Have Low Fluid Accumulator Level Revealed 2 Deteriorated o-rings Made W Polyurethene Seals Instead of ethylene-propylene Seals ‎ (← links)
  • 05000312/LER-1978-008-02, /02T-0:on 780804,analysis Showed Atypical Weld Filler Wire W/High Silicon & Low Nickel Contents in Archive Weldments.Wire Mixed by Supplier W/Shipment of Mn-Mo-Ni Filler Wire.Caused by Inadequate QA ‎ (← links)
  • 05000312/LER-1978-008, Forwards LER 78-008/02T-0 ‎ (← links)
  • 05000312/LER-1978-006-03, /03L-0:on 780611,during Normal Operation,Increased Leakage Noticed,Between 1.1-1.7 Gallons/Min.Caused by Leaking Pressure Safety Valves & Block Valve on Electromatic Relief Valve.Valves Replaced or Reworked ‎ (← links)
  • 05000312/LER-1978-004-01, /01T-1:on 780414,small Break Analysis Determined to Be at Rc Pump Discharge.Analysis Identified & Evaluated Solutions.Facility Has Incorporated Procedural Changes & Initiated Design Changes ‎ (← links)
  • 05000312/LER-1986-001, :on 860121,diesel Generator G-886B Declared Inoperable Due to Fuel Inlet Pressure Above Limits Specified in Process Stds.Safety Functions Performed.New Spare Parts Ordered for Generator ‎ (← links)
  • 05000312/LER-1986-004, :on 860215,review of Fire Door Refueling Interval Surveillance Test Results Revealed That Fire Doors Determined to Be Inoperable & Fire Watches Not Posted within 1 H.Caused by Personnel Error.Watches Posted ‎ (← links)
  • 05000312/LER-1986-003, :on 860314,while Attempting to Perform Calibr on Reactor Bldg Exhaust Monitor R15001 Sample Flow Meter, Containment Purge Went Unmonitored for 50 Minutes.Control Room Operator Counseled ‎ (← links)
  • 05000312/LER-1985-024, :on 851222,RCS Leakage Calculated to Be Between 15 & 20 Gallons Per Minute.Shutdown Initiated.Caused by Leaking Packing Gland SFV-70001.Gland Disassembled & Inspected.Twelve Rings of Packing Added ‎ (← links)
  • 05000312/LER-1985-021, :on 851119,emergency Diesel Generator a Automatically Started When Bus 4A Normal Supply Breaker Tripped on Overvoltage Condition.Caused by Technicians Disconnecting Ground Wiring ‎ (← links)
  • 05000312/LER-1985-019, :on 851002,reactor Trip Occurred & RCS Temp Decreased to Approx 70 F.Caused by Excessive Steam Loads Due to Two Open Relief Valves on Feedwater Heater 4A.HPI Flow Manually Initiated to Maintain Pressure ‎ (← links)
  • 05000312/LER-1985-020, :on 851007,internal Occurrence Description Rept Indicated That Flow Controllers for Control Room/Technical Support Ctr Essential HVAC Filtration Units Malfunctioning. Caused by Design Error.Correction Made ‎ (← links)
  • 05000312/LER-1984-016, :on 840425,RCS Pump Seal Return Line Isolation Valve Exceeded Tech Spec Stroke Time Limit.Caused by Weaknesses in Documentation & Surveillances of Equipment. Valve Restroked.Surveillance Procedure Revised ‎ (← links)
  • 05000312/LER-1985-023, :on 851205,reactor Trip Occurred on High RCS Pressure.Caused by Underfeeding of Main Feedwater Sys During Flow Scaling Procedure.Integrated Control Sys Modules Examined & Refurbished ‎ (← links)
  • 05000312/LER-1984-020, :on 840703,tube Leak Experienced in once- Through Steam Generator B.During Cooldown,Unplanned Reactor Trip Occurred on Low RCS Pressure.Caused by Through Wall Defect at 15th Tube Support Plate ‎ (← links)
  • 05000312/LER-1984-019, :on 840608,Tech Specs Violated When Diesel Generators No Longer in Ambient State Prior to Tests Being Performed.Caused by Rev to Procedures EM.177A & B.Maint Startup Deleted from Procedures ‎ (← links)
  • 05000312/LER-1985-015, :on 850716,electrician Working in Switchgear Area Accidently Tripped Nuclear Svcs Bus 4B2,causing Emergency Diesel Generator B to Automatically Start.Caused by Loose Terminal Board Connections ‎ (← links)
  • 05000312/LER-1985-017, :on 850906,leakage Flow Path Reported in Filtration Unit of Auxiliary Bldg a Ventilation Unit.Caused by Omission of Seal Plate During Mfg.Steel Plate Welded Over Bypass Opening ‎ (← links)
  • 05000312/LER-1979-008-03, /03L-0:on 790719,while Performing Monthly Pump Surveillance on B Decay Heat Removal Pump,Leakage in Excess of 0.63 Gallons/Minute Allowable Per Tech Spec 4.5.3.1 Observed at Pump Seal.Seal Replaced & Sys Adequately Tested ‎ (← links)
  • 05000312/LER-1985-005, :on 850420,valve BWS-041 in Boration Path Closed During Fuel Movement.Caused by Procedural Error. Procedure B.8 Revised to Require Clearance Tag to Be Placed on BWS-041 After Opening During Refueling ‎ (← links)
  • 05000312/LER-1985-008, :on 850521,portion of Surveillance Procedure Sp 301.03k Re Accessible Cable Tray Fire Barriers Discovered Not Performed within Specified Interval.Caused by Incorrect Date Listed for Previous Surveillance ‎ (← links)
  • 05000312/LER-1980-013-03, /03L-0:on 800218,following Biannual Insp of Diesel Generator B,Problem W/Dc Air Start Sys Noted.Probably Caused by Natural end-of-life for Flexible Synthetic Rubber Line. Line Replaced ‎ (← links)
  • 05000312/LER-1980-014-03, /03L-0:on 800219,while Moving Aris Calibr Block, Sling Failed & 3,000 Lb Block Fell Into Flange Transfer Canal.Caused by Inadequate Sling Utilized for Lift.Speed Change Problem Corrected ‎ (← links)
  • 05000312/LER-1979-024-03, /03L-0:on 791217,during Normal Operation,Hpi Pump B Taken Out of Svc.On 800109,discovered That Cooling Water Supply Valves Were Isolated.Caused by Removal of HPI Pump B from Svc.Pump B Returned to Svc & Placed on Standby ‎ (← links)
  • 05000312/LER-1980-045-01, /01T-0:on 801031,per IE Bulletin 79-01B Review, Found Limit Switches Utilized on Air Operated Containment Isolation Valves Do Not Meet Environ Qualification Criteria. Switches Will Be Replaced by 820630 ‎ (← links)
  • 05000312/LER-1982-014-03, /03L-0:on 820619,pressurizer Liquid Sample Valve, SFV-70001,opened Properly But Failed to Close Properly on Command.Caused by Ax Relay Not Responding to Close Command. Relay Replaced ‎ (← links)
  • 05000312/LER-1982-013-04, /04T-0:on 820607,during Chlorination of Nuclear Svc Spray Pond,Spray Pond Filters Went Into Backwash Mode. Cause Not Stated.Several Fish in Discharge Stream Killed Due to Excessive Chlorine.Chlorine Injection Point to Be Mov ‎ (← links)
  • 05000312/LER-1982-009-01, /01T-0:on 820405,radiographic & Ultrasonic Exam of High Pressure Injection Nozzles Revealed Unacceptable Condition in a & B Nozzles.Cause Not stated.Safe-ends Will Be Replaced W/New Design ‎ (← links)
  • 05000312/LER-1982-009, Forwards LER 82-009/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-012-03, /03L-0:on 820505,during Cold Shutdown,A Decay Heat Pump Inboard Bearing Found Leaking Oil.Cause of Leak Undetermined.Probable Cause Due to Partial Seal Failure.Leak Will Be Repaired ‎ (← links)
  • 05000312/LER-1982-012, Forwards LER 82-012/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-010-01, /01T-1:on 820419,insp of B once-through Steam Generator Auxiliary Feedwater Header Ring & a Ring on 820420 Revealed Deformations.Mod Work to Correct Problem Partially Scheduled.Old Header Will Be Stabilized ‎ (← links)
  • 05000312/LER-1982-010, Forwards LER 82-010/01T-1.Optimum Repair Schedule Encl ‎ (← links)
  • 05000312/LER-1982-011-03, /03L-0:on 820415,check Valve CBS-022 on B Tank Supply to B Pump Found Stuck Closed.Caused by Chemical Deposit Buildup.Check Valves Cleaned,Reground & Returned to Svc ‎ (← links)
  • 05000312/LER-1982-011, Forwards LER 82-011/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-008-04, /04T-0:on 820121,plant Effluent Ph Found to Be High (8.6-8.7) for Approx 5 Minutes.Caused by Instrument Error.Rh & Delta TC Probes Replaced ‎ (← links)
  • 05000312/LER-1982-008, Forwards LER 82-008/04T-0 ‎ (← links)
  • 05000312/LER-1990-001, Forwards Errata to LER 90-001-00,re Inoperable Radioactive Gaseous Effluent Monitoring Instrumentation Not Reported in Semiannual Radioactive Effluent Release Rept Due to Procedural Deficiencies,To Include Rept Date ‎ (← links)
  • 05000312/LER-1982-005-03, /03L-0:on 820211,B Diesel Generator Found Inoperable.Caused by Output Breaker lock-out Due to Reverse Power Trip.Relays Marked to Improve Identification of Flag Targets,Personnel Trained & lock-out Alarm Moved ‎ (← links)
  • 05000312/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-004-03, /03L-0:on 820209,reactor Protection Sys Channel C Pressure Transmitter Read 15 Psi High.Caused by Calibr of Transmitter During Artificial Cooling of Ambient Temp by Emergency Cooler.Input Buffer Amp Bias Changed ‎ (← links)
  • 05000312/LER-1982-004, Forwards LER 82-004/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-006-04, /04T-0:on 820305,during Review of Plant Effluent Records,Discovered That Ph Limit Was Exceeded on 820219. Caused by Sample Sys Configuration for Regenerate Hold Up Tank Discharging Into Plant Waste Stream.Sys Modified ‎ (← links)
  • 05000312/LER-1982-007-04, /04T-0:on 820305,monthly Review of Plant Effluent Records Revealed Plant Effuent Chlorine Limit Exceeded for Period of 2.5-hr on 820217.Caused by Analyst Failing to Take Sample at Site Boundary.Analysis Reinstructed ‎ (← links)
  • 05000312/LER-1982-006, Forwards LER 82-006/04T-0 ‎ (← links)
  • 05000312/LER-1982-007, Forwards LER 82-007/04T-0 ‎ (← links)
  • 05000312/LER-1982-001-01, /01T-0:on 820130,both Doors on Airlock Opened Simultaneously Resulting in Loss of Containment Integrity. Caused by Personnel Error & Failure of Inner Door Mechanism to Latch Properly ‎ (← links)
  • 05000312/LER-1982-003-01, /01T-0:on 820301,B HPI Pump Found to Be Inoperable Due to Leaving Dc Charging Motion for Closing Spring in Unenergized State.Probably Caused by Personnel Error or Improper Procedure.Addl Training Provided ‎ (← links)
  • 05000312/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-003, Forwards LER 82-003/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-002-03, /03L-0:on 820130,snubbers 1SW-21007-7 & 1SW-23823-13A Failed Visual Insps.Caused by Low Fuel Level. Snubber 1SW-21007-7 Rebuilt & Passed.Snubber 1SW-23823-13A Failed Until Bechtel Developed New Criteria ‎ (← links)
  • 05000312/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-058-03, /03L-0:on 811221,repts Required by Tech Specs 4.2.8 Re Cumulative Reactor Utilization Factor Had Not Been Written Since Jul 1980.Generation Engineering Is Writing Rept ‎ (← links)
  • 05000312/LER-1981-058, Forwards LER 81-058/03L-0 ‎ (← links)
  • 05000312/LER-1981-057-03, /03L-0:on 811208,reactor Protection Channel C Found Indicating 15 Psi Higher than Channels A,B & D. Apparently Caused by Transmitter Failure.Investigation Continuing & Channel C Bypassed ‎ (← links)
  • 05000312/LER-1981-057, Forwards LER 81-057/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-056-01, /01T-0:on 811211,instrument Technician Tested Instrumentation on Reactor Protective Sys Channel When Trip Sys Not Set Up to Retain Min Degree of Redundancy.Caused by Failure to Follow Procedures.Technicians Reinstructed ‎ (← links)
  • 05000312/LER-1981-056, Forwards LER 81-056/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-055-03, /03L-0:on 811118,reactor Protection Sys Pressure Transmitters in B & C Channels Found to Have Drifted.Cause Not Stated.Setback of 20 Psi Implemented & Transmitters Rezeroed ‎ (← links)
  • 05000312/LER-1981-055, Forwards LER 81-055/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-054-03, /03L-0:on 811024,while Performing RPS Channel C Test I-108C,breaker Trip Test Not Done.Caused by Technician Failure to Perform Test as Required.Trip Test Performed on 811026 ‎ (← links)
  • 05000312/LER-1981-054, Forwards LER 81-054/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-052-03, /03L-0:on 811005,nuclear Svc Raw Water Pump B (P-472B)tripped W/O Alarms or Target Drops.Cause Not Found. Pump Restarted & Quarterly Surveillance Test Run W/O Problems ‎ (← links)
  • 05000312/LER-1981-052, Forwards LER 81-052/03L-0.Detailed Event Analysis Submittted ‎ (← links)
  • 05000312/LER-1981-053-03, /03L-0:on 811022,safety Features Valve SFV-20577 Failed to Stroke Fully Closed.Valve Cycled Manually Then Cycled Electrically W/No Difficulty.Motor Current Found Acceptable.Valve Will Be Tested Again in Cold Shutdown ‎ (← links)
  • 05000312/LER-1981-053, Forwards LER 81-053/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-049-03, /03L-0:on 810929,while Performing Surveillance Test,Safety Features Valve SFV-22025 Failed to Close.Caused by Lack of pre-set Compression on Spring Pack in Limitorque Operation.New Spring Pack Installed in Valve ‎ (← links)
  • 05000312/LER-1981-049, Forwards LER 81-049/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-051-03, /03L-0:on 810930,while Performing Surveillance Test,Safety Features Valve SFV-46014 Found to Have Excessive Stroke Time.Caused by Tightness of Valve Packing. Reajusted Packing & Lubricated Stem ‎ (← links)
  • 05000312/LER-1981-051, Forwards LER 81-051/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-043, Ro:On 810916,during Surveillance through-path Found on Floor Penetration.Repair Should Entail Use of Silicon Foam or Grout & Will Be Made in Group Repair W/Other Similar Occurrence Noted in LER 81-43 ‎ (← links)
  • 05000312/LER-1981-016-03, Degradation of Lube Oil Cooling Capacity on HPI Pump B Found.Caused by Excessive Corrosion of Cooler Heads.Coolers Cleaned & One Epoxy Coated.After Satisfactory Performance Two Others Coated ‎ (← links)
  • 05000312/LER-1981-050-03, /03L-0:on 810930,during Surveillance Test,Valve Failed to Stroke Closed.Caused by Water & Rust Preventing Solenoid from Proper Operation.Valve Cleaned & Replaced.Addl Maint Efforts Will Address Moisture Collection Problem ‎ (← links)
  • 05000312/LER-1981-050, Forwards LER 81-050/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-041-03, /03L-0:on 810916,found That Pipe Supports Could Be Overstressed by Thermal & Seismic Loads.Caused by Design Deficiency.Pipe Supports Redesigned & Modified to Conform to ASME Code Allowables ‎ (← links)
  • 05000312/LER-1981-041, Forwards LER 81-041/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-047-01, /01E-0:on 810930,bus a Emergency Pressurizer Heater Bank 3 Operated Intermittently Due to Loose Wire. Caused by Misoriented Screw Washer.Washer re-oriented & Screw Tightened ‎ (← links)
  • 05000312/LER-1981-047, Forwards LER 81-047/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-048-04, /04T-0:on 811003,monthly Record Review Revealed Violation on 4 Days of Ph Limit in Sept.Three Violations Caused by Instrument Calibr.Corrective Action in Followup Rept ‎ (← links)
  • 05000312/LER-1981-048, Forwards LER 81-048/04T-0 ‎ (← links)
  • 05000312/LER-1981-044-03, /03L-0:on 810825,during once-through Steam Generator Sampling Operation W/Plant Shut Down,Abnormal Level of Radioactivity Found.Caused by Leak in Nitrogen Supply Sys.Spool Piece Replaced by Blank Flanges ‎ (← links)
  • 05000312/LER-1981-044, Forwards LER 81-044/03L-0 ‎ (← links)
  • 05000312/LER-1981-046-03, /03L-0:between 810910 & 19,snubber Surveillance Procedure Revealed One Failed Snubber & Five Snubbers Low in Hydraulic Fluid.Caused by Clevis Pin & Pipe Line Clamp Nuts Missing in Former & Worn Valve Block Body in Others ‎ (← links)
  • 05000312/LER-1981-046, Forwards LER 81-046/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-042-04, /04T-0:on 810903,during Monthly Review of Plant Effluent Records,Found That Ph Limit Was Violated on Four Days in Aug.Plant Effluent Sys Allows Several Minor Violations Per Month.Followup Rept Will Be Submitted ‎ (← links)
  • 05000312/LER-1981-042, Forwards LER 81-042/04T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-043-03, /03L-0:on 810818,performance of Surveillance Procedure Revealed 26 Discrepant Pipe Penetration Fire Stops.Caused by Insufficient Grouting,Supports & Silicone Foam.Fire Watch Will Continue Pending Repairs by 811215 ‎ (← links)
  • 05000312/LER-1981-040-04, /04T-0:on 810831,review of Water Quality Records Revealed That Limit on Total Dissolved Solids Exceeded on 810709.Caused by Operator Inattention to Integrated Flow Rate/Dissolved Solids Indication.Operator Will Review Rept ‎ (← links)
  • 05000312/LER-1981-040, Forwards LER 81-040/04T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-035-03, /03L-1:on 810625 Diesel Generator a Synchronization Test Revealed Unstable Operation of Diesel Generator G886A.Caused by Slow Oil Leak in Governor.Oil Added.Generator to Be Replaced ‎ (← links)
  • 05000312/LER-1981-035, Forwards LER 81-035/03L-1.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-036-04, /04T-0:on 810713,monthly Review of Plant Effluent Records Revealed 12 Instances of Plant Effluent Ph Exceeding Allowable Levels.Caused by Ongoing Work on Instrumentation, Poor Sampling Techniques & Leaking Valves ‎ (← links)
  • 05000312/LER-1981-036, Forwards LER 81-036/04T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-023-03, /03L-0:on 820909,weekly Nitrogen Sys Surveillance Showed Xe-133 Activity in Auxiliary Bldg Nitrogen Header. Cause Undetermined.Investigation Will Be Conducted.Followup Rept on Cause & Corrective Actions Will Be Provided ‎ (← links)
  • 05000312/LER-1982-023, Forwards LER 82-023/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-029-03, /03L-0:on 821026,QA Dept Reported That Portion of Auxiliary Feedwater Start Circuit Was Not Being Tested Per Requirements.Caused by Transposed Requirements in Tech Specs.Tech Specs Will Be Amended ‎ (← links)
  • 05000312/LER-1982-027-03, /03L-0:on 821012,weekly Surveillance of Nitrogen Sys Revealed Presence of Contamination in Form of Xe-133. Cause Undetermined.Sys Purged & Activities Reduced to Below Detectable Levels.Investigation Underway.Rept Will Follow ‎ (← links)
  • 05000312/LER-1982-029, Forwards LER 82-029/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-027, Forwards LER 82-027/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1982-028-99, /99X-0:on 820922,small Pieces of Matl Resembling Paint Chips Observed During Flow Control Valve Repair in Auxiliary Bldg Fire Protection Sys.Probably Caused by Detached Liner Matl.Piping to Be Inspected & Repaired ‎ (← links)
  • 05000312/LER-1982-028, Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1983-025-03, /03L-0:on 830601,during Records Review,Effluent Sample on Release Erdf 83-56 Discovered Not Performed. Caused by Operator Failing to Notify chem-rad Officer at Onset of Release.Procedure Revised ‎ (← links)
  • 05000312/LER-1983-016-03, /03L-0:on 830331,during Surveillance Testing on snubbers,10 Snubbers Mfg by Grinnell & Bergen-Patterson Failed Acceptance Criteria.Caused by Defective Seals,Body Corrosion & Water in Fluid.Valves Rebuilt ‎ (← links)
  • 05000312/LER-1983-022-03, /03L-0:on 830507,cooling Water to Reactor Bldg Emergency Cooling Unit a 500c Motor Found to Be Drawing Locked Rotor Current Preventing Valve from Stroking.Female Control Disconnect Switch Found Spread Apart ‎ (← links)
  • 05000312/LER-1981-045-03, /03L-0:on 810827,during Plant Shutdown,Decay Heat Pump B Was Found Leaking.Cause Not Stated.Shaft Seals Will Be Replaced Prior to Next Reactor Startup ‎ (← links)
  • 05000312/LER-1981-045, Forwards LER 81-045/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-039-03, /03L-0:on 810807,switchyard Voltage Decreased to 206 Kv W/Reactor Shut Down.Caused by High Local Electrical Demand.Direct Indication of Voltage & Alarm Will Be Installed in Control Room.Updated Analysis Forthcoming ‎ (← links)
  • 05000312/LER-1981-039, Forwards LER 81-039/03L-0 ‎ (← links)
  • 05000312/LER-1981-038-03, /03L-0:on 810713,fire Door Surveillance Procedure Revealed 37 Apparently Unacceptable Fire Doors.Cause Not Stated.Obstruction Removed from one,13 Repaired & 23 Found Acceptable.Fire Watches to Be Established ‎ (← links)
  • 05000312/LER-1981-038, Forwards LER 81-038/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-037-03, /03L-0:on 810707,during Surveillance Test, Isolation Valve Failed to Close within Tech Spec Limit. Apparently Caused by Foreign Matl in Air Discharge Port.Port Cleaned & Valve Operated Properly ‎ (← links)
  • 05000312/LER-1981-037, Forwards LER 81-037/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-034-03, /03L-0:on 810619,switchyard Voltage Decreased W/ Reactor Shutdown.Caused by High Local Electrical Demand. Direct Indication of Switchyard Voltage & Alarm to Be Installed in Control Room & Safety Analysis to Be Updated ‎ (← links)
  • 05000312/LER-1981-034, Forwards LER 81-034/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-033-03, /03L-0:on 810611,investigation of Diesel Trouble Alarm Revealed Open Relay Which Would Have Prevented Operation of Diesel Generator A.Relay Reset.Alarm to Be Modified ‎ (← links)
  • 05000312/LER-1981-033, Forwards LER 81-033/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-032-03, /03L-0:on 810527,snubber W/Nearly Empty Accumulator on Letdown Cooler Discovered During Sp at Cold Shutdown.Caused by Leaking Valve Block Seal.Snubber Removed, Adjusted & Reinstalled & Seal Replaced ‎ (← links)
  • 05000312/LER-1981-032, Forwards LER 81-032/03L-0 ‎ (← links)
  • 05000312/LER-1989-013, :on 891205,sealed Radioactive Sources Used W/O Required Leak Testing.Caused by Deficiency in Surveillance Procedure SP.1101 Re Semiannual Leak Testing for Sealed Sources.Sources Tested Soon After Discovery ‎ (← links)
  • 05000312/LER-1981-030-04, /04T-0:on 810602,plant Effluent Ph Exceeded Limit. Caused by Fluctuating Ph of Water Supply.Negotiations Underway to Set Ph Limits Based on Max Observed Canal Ph in Previous 30 Days ‎ (← links)
  • 05000312/LER-1981-030, Forwards LER 81-030/04T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-031-03, /03L-0:on 810520,fire Barrier Failures Discovered During Sp at Cold Shutdown.Caused by Personnel Failure to Return Barriers to Satisfactory Condition Following Breach. Firewatch Established for Compromised Barriers ‎ (← links)
  • 05000312/LER-1981-031, Forwards LER 81-031/03L-0 ‎ (← links)
  • 05000312/LER-1981-028-03, /03L-0:on 810506,inaccessible Snubber Found Low on Fluid During Safety Sys Hydraulic Snubbers Surveillance Inservice Test.Caused by Faulty Accumulator Internals or Valve Body.Internals & Body Removed,Reworked & Reinstalled ‎ (← links)
  • 05000312/LER-1981-028, Forwards LER 81-028/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-027-03, /03L-0:on 810502,RBS Pump Breaker 3A09 Tripped When Attempting Start from Control Room.Cause Unknown.Trip Reset ‎ (← links)
  • 05000312/LER-1981-027, Forwards LER 81-027/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-025-03, /03T-0:on 810420 & 0506,pressurizer Liquid Sample Valve Failed to Operate.Caused by Stripped Drive Sleeve Bevel Gear.Operator Removed & Replaced.Valve Tested & Stroked ‎ (← links)
  • 05000312/LER-1981-025, Forwards LER 81-025/03T-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-024-03, /03T-0:on 810419,approx 4,000 Gallons of Reactor Coolant Was Inadvertently Transferred from RCS to Reactor Bldg Emergency Pump.Caused by Personnel Error.Rcs Was Refilled & Revented ‎ (← links)
  • 05000312/LER-1981-024, Forwards LER 81-024/03T-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000312/LER-1981-021-03, /03T-0:on 810402,BWST Valve SFV-25003 Failed to Open Electrically Due to Rounded Off Dogs on Worm Shaft Clutch Gear.Caused by Manual Operation of Valve.Worm Components Replaced.Design Changes Are Being Processed ‎ (← links)
  • 05000312/LER-1981-021, Forwards LER 81-021/03T-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-017-03, /03L-0:on 810316,unistrut Cable Tray Support H-80 Found 3 Ft Out of Position & Not Fastened W/Anchor Bolts. Probably Caused by Relocation to Facilitate Movement of Equipment.Support Relocated & Fastened ‎ (← links)
  • 05000312/LER-1981-017, Forwards LER 81-017/03L-0 & Submits Detailed Event Analysis ‎ (← links)
  • 05000312/LER-1981-020-04, /04T-0:on 810326,liquid Effluent Ph Exceeded 8.5 Tech Spec Limit for Approx 15 Minutes.Caused by Retention Basin Being Released Prior to Increasing Dilution Water Flow.Effluent Ph Instrumentation Calibr & Monitored ‎ (← links)
  • 05000312/LER-1981-020, Forwards LER 81-020/04T-0 & Submits Detailed Event Analysis ‎ (← links)
  • 05000312/LER-1981-019-03, /03L-0:on 810316,obstruction in Suction of Atmosphere Radiation Monitor R15001B Discovered.Caused by Plastic Cap from Bottle of Industrial Leak Detection Fluid. Bottle Cap Removed from Sample Line Suction ‎ (← links)
  • 05000312/LER-1981-019, Forwards LER 81-019/03L-0 & Submits Detailed Event Analysis ‎ (← links)
  • 05000312/LER-1981-013-03, /03L-0:on 810223,inner Door of Reactor Bldg Personnel Hatch Failed to Close Completely.Caused by Misinterpretation of Tech Specs.Written Interpretation to Be Distributed ‎ (← links)
  • 05000312/LER-1981-013, Forwards LER 81-013/03L-0 ‎ (← links)
  • 05000312/LER-1980-020, Has Been Cancelled ‎ (← links)
  • 05000312/LER-1980-049-03, /03L-0:on 801219,during Performance of Sp 206.03B, B Diesel Generator Failed to Start.Cause Not Stated.Unit Declared Operable 801222 After Passing Applicable Surveillance Test ‎ (← links)
  • 05000312/LER-1980-046-03, /03L-0:on 801104 & 1128,overspeed Trip Lever on Turbine for Automatic Feedwater Pump P-318 Was Found in Apparent Tripped Condition.Cause Could Not Be Determined. Daily Visual Checks Initiated ‎ (← links)
  • 05000312/LER-1980-046, Forwards LER 80-046/03L-0 ‎ (← links)
  • 05000312/LER-1981-005-04, /04L-0:on 810125,plant Liquid Effluent Ph Exceeded 8.5 Limit Established by Tech Spec App B,Section 2.4.Caused by Slightly out-of-tolerance Setpoint.Diversion Setpoint Was Reset.Alarm Setpoint Will Be Lowered ‎ (← links)
  • 05000312/LER-1981-005, Forwards LER 81-005/04L-0 ‎ (← links)
  • 05000312/LER-1980-047-01, /01T-0:on 801222,IE Bulletin 79-01B Review Found Lack of Qualification Documentation for Flow Transmitter Utilized to Establish Dilution Flow to Prevent Boron Precipitation Following Loca.Cause Not Stated ‎ (← links)
  • 05000312/LER-1980-047, Forwards LER 80-047/01T-0 ‎ (← links)
  • 05000312/LER-1989-012, :on 891113,control Room Alarms Received Indicating That All Four Channels of Radiation Monitor R-15045 Experienced Loss of Sample Flow.Caused by Personnel Error.Sample Flow Reinstated ‎ (← links)
  • 05000312/LER-1981-014-03, /03L-0:on 810306,unacceptable Leak Rate Obtained During Local Component Leak Rate Test on Reactor Bldg Penetration 34.Caused by Motor Pinion Gear Key Backed Out of Keyway & Sheared Off.Set Screw Added to Operator Key ‎ (← links)
  • 05000312/LER-1981-014, Forwards LER 81-014/03L-0.Detailed Event Analysis Encl ‎ (← links)
  • 05000312/LER-1981-015-04, /04T-0:on 810214,review of Feb 1981 Effluent Charts Showed Tech Spec for Plant Effluent Ph Was Exceeded. Caused by Effluent Diversion Setpoint Being Slightly out-of-tolerance.Setpoints Lowered ‎ (← links)
  • 05000312/LER-1981-015, Forwards LER 81-015/04T-0.Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-010-01, /01T-0:on 810225,A/E,performing Analysis for IE Bulletin 79-14,informed of Potential Piping Stress Problem on Decay Heat Removal Sys A,Line 26120-10.Caused Not Stated. Sys Use Restricted to Temps & Pressures Below Design Lim ‎ (← links)
  • 05000312/LER-1981-010, Forwards LER 81-010/01T-0 ‎ (← links)
  • 05000312/LER-1981-009-03, /03L-0:on 810217,during Testing of Mod to Diesel Generator Room Vent Fans,Breaker 52-3B17 Tripped Free. Cause Undetermined.Breaker Replaced W/Class 1 Breaker & Returned to Svc ‎ (← links)
  • 05000312/LER-1981-009, Forwards LER 81-009/03L-0 ‎ (← links)
  • 05000312/LER-1981-006-03, /03L-0:on 810206,one of Two Pressurizer Code Safety valves,PSV-21506,lifted Above Setpoint Level Per Tech Specs During Bench Test.Possibly Caused by Seat Leakage During Test & Limited Capacity of Bench Tester ‎ (← links)
  • 05000312/LER-1981-006, Forwards LER 81-006/03L-0 ‎ (← links)
  • 05000312/LER-1981-008-01, /01T-0:on 810218,breaker Did Not Trip During Preventative Maint on Breaker 3A09,RBS Pump P-291A.Caused by Loose Wire on Pigtail of Trip Coil Due to Use of 14-16 Awg Lug on 20 Awg Wire.All Lugs on Pigtail Leads to Be Replaced ‎ (← links)
  • 05000312/LER-1981-008, Forwards LER 81-008/01T-0 ‎ (← links)
  • 05000312/LER-1981-023-04, /04T-0:on 810408,plant Liquid Effluent Ph Was Found to Have Dropped Below Tech Spec Limit.Probably Caused by Stagnant,Low Ph Water in Drain Line Due to Gravity Drain of Basin ‎ (← links)
  • 05000312/LER-1981-023, Forwards LER 81-023/04T-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-022-03, /03L-0:on 810416,safety Sys Hydraulic Snubbers SS-16,SS-17 & 71(MS-20522-SW2) Were Found Low on Fluid Level.Cause Not Stated.Assemblies Reworked ‎ (← links)
  • 05000312/LER-1981-022, Forwards LER 81-022/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-029-03, /03L-0:on 810513,partially Failed Pipe Hanger on Main Steam Line a Was Discovered.Weld Holding Clevis to Attachment Plate on Hanger Was Partially Pulled Apart.Cause Unknown.Hangers to Be Reinspected When Operation Resumes ‎ (← links)
  • 05000312/LER-1981-029, Forwards LER 81-029/03L-0.Detailed Event Analysis Also Submitted ‎ (← links)
  • 05000312/LER-1981-026-01, /01T-0:on 810516,alert Indication Shown on Condenser Air Ejector Radiation Monitor Followed by High Alarm.Caused by Tube Leakage Due to through-wall Crack.Tubes Stabilized & Plugged ‎ (← links)
  • 05000312/LER-1981-026, Forwards LER 81-026/01T-0 & Submits Detailed Event Analysis ‎ (← links)
  • 05000312/LER-1981-018-04, /04T-0:on 810317,chlorine Concentration Exceeded Tech Specs Limit.Caused by Lower Flow Rate in One of Two Plant Sewage Sys Sump Pumps,Allowing Excess Hypochlorite Injection.Injection Rate Has Been Decreased ‎ (← links)
  • 05000312/LER-1981-018, Forwards LER 81-018/04T-0 ‎ (← links)
  • 05000312/LER-1981-016-01, /01T-0:on 810312,during Maint Insp of Lube Oil Cooler for HPI Pump B Discovered Substantial Corrosion Products Causing Degradation in Cooling Capacity.Caused by Excessive Corrosion of Cooler Heads ‎ (← links)
  • 05000312/LER-1981-016, Forwards LER 81-016/01T-0 ‎ (← links)
  • 05000312/LER-1980-039-01, /01T-0:on 800813,while Proceeding to Cold Shutdown,Reactor Protection Sys Was Placed in Shutdown Bypass Mode & Nuclear Overpower Trip Setpoint Not Reduced to Less than 5% of Rated Power.Caused by Personnel Error ‎ (← links)
  • 05000312/LER-1980-039, Forwards LER 80-039/01T-0 ‎ (← links)
  • 05000312/LER-1980-036-41, /041-0:on 800710,review of Jul 1980 Effluent Monitoring Charts Indicated Plant Liquid Effluent Ph in Excess of 8.5 Tech Spec Limit.Cause Unknown.Automatic Diversion Setpoint Lowered to Minimize Recurrence ‎ (← links)
  • 05000312/LER-1980-036, Forwards LER 80-036/041-0 ‎ (← links)
  • 05000312/LER-1980-038-41, /041-0:on 800729,review of Plant Effluent Data for Jul 1980 Indicated That on 800629 & 30,sample Indicated 0.25 & 0.3 Mg/Liter Chlorine.Second Followup Sample Not Obtained.Caused by Personnel Error.Personnel Reinstructed ‎ (← links)
  • 05000312/LER-1980-038, Forwards LER 80-038/041-0 ‎ (← links)
  • 05000312/LER-1980-037-04, /04L-0:on 800728,monthly Review of Plant Effluent Recorder Charts Indicated Total Dissolved Solids Discharged Exceeded Tech Specs.Caused by Higher than Normal Flow Rate & High Conductivity ‎ (← links)
  • 05000312/LER-1980-037, Forwards LER 80-037/04L-0 ‎ (← links)
  • 05000312/LER-1980-009-03, /03L-0:on 800207,during Function Tests of Relays in 4,160-volt Feeder Breakers,Contacts Sfax (Sfbx) Found Not Wired.Caused by Discrepancy Between Design & Internal Switchgear Wiring Diagrams.No Changes Necessary ‎ (← links)
  • 05000312/LER-1980-009, Forwards LER 80-009/03L-0 ‎ (← links)
  • 05000312/LER-1980-010-03, /03L-0:on 800213,during Refueling,Polar Crane Moved Over Upender When Upenders Contained New & Irradiated Fuel Assemblies.Caused by Personnel Ignorance of Restrictions in Core Monitor.Handling & Disposal Revised ‎ (← links)
  • 05000312/LER-1980-010, Forwards LER 80-010/03L-0 ‎ (← links)
  • 05000312/LER-1981-012-01, /01T-0:on 810303,as-found Setpoints for High Reactor Bldg Pressure Trip Were Noted Exceeding Tech Spec. Caused by Instrument Drift.Switches Reset & Setpoints Revised ‎ (← links)
  • 05000312/LER-1981-012, Forwards LER 81-012/01T-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1981-011-03, /03L-0:on 810217,reactor Bldg Sump/Decay Heat Removal Sys Flow Path Obstructed.Caused by Installation of Blank Test Flanges on Suction Lines.Flanges Removed & Test Procedure Revised ‎ (← links)
  • 05000312/LER-1981-011, Forwards LER 81-011/03L-0.Detailed Event Analysis Submitted ‎ (← links)
  • 05000312/LER-1980-043-01, /01T-0:on 801031,IE Bulletin 79-01B Review Determined That air-operated Valves Utilize Solenoid Pilot Valves Which Do Not Meet Current Environ Qualification Criteria.Cause Not Stated.Valves Will Be Replaced ‎ (← links)
  • 05000312/LER-1980-043, Forwards LER 80-043/01T-0 ‎ (← links)
  • 05000312/LER-1981-003-03, /03L-0:on 810203,during Reactor Bldg Spray Sys Loop B Sfas Test,Reactor Bldg Spray Pump B Started Late. Caused by Incorrect Setting on Model 62B Agastat Timer. Timer Reset ‎ (← links)
  • 05000312/LER-1981-003, Forwards LER 81-003/03L-0 ‎ (← links)
  • 05000312/LER-1981-004-03, /03L-0:on 810202,component Cooling Water Isolation Valve Failed to Close During Surveillance Procedure 205.07C, Isolation Valve Surveillance test,SFV-46204.Caused by Water in Air Line of Valve Actuator.Water Drained ‎ (← links)
  • 05000312/LER-1981-004, Forwards LER 81-004/03L-0 ‎ (← links)
  • 05000312/LER-1981-007-01, /01T-0:on 810210,info Received That Certain safety-related Instrument Errors Exceed Those Assumed in FSAR Analysis.Possibly Caused by String Error Discrepancies. Applicability of Methodology Used in Rept Being Reviewed ‎ (← links)
  • 05000312/LER-1981-007, Forwards LER 81-007/01T-0 ‎ (← links)
  • 05000312/LER-1980-050-04, /04T-0:on 810105,environ TLD Monitor Along Perimeter Fence Indicated Dose Rates Above Tech Spec.Caused by Close Proximity to Drum Storage Area.Bulk Radwaste Storage Bldg Will Be Constructed ‎ (← links)
  • 05000312/LER-1980-050, Forwards LER 80-050/04T-0 ‎ (← links)
  • 05000312/LER-1980-048-03, /03L-0:on 801201,while Reviewing Inservice Insp Program & Surveillance Procedures,Two Remotely Operated Reactor Bldg Isolation Valves Discovered Not Tested as Required by Tech Specs.Caused by Deletion of Quarterly Test ‎ (← links)
  • 05000312/LER-1980-048, Forwards LER 80-048/03L-0 ‎ (← links)
  • 05000312/LER-1980-042-04, /04T-0:on 801009,six of 19 Environ TLD Monitors Indicated Dose Rates Above Tech Specs,App B,Requirements. Caused by TLD Being Passed Through X-ray Prior to Being Brought Onsite.Tld No Longer Passed Through Machines ‎ (← links)
  • 05000312/LER-1980-042, Forwards LER 80-042/04T-0 ‎ (← links)
  • 05000312/LER-1980-041-03, /03L-0:on 800823,diesel Generator B Did Not Achieve Rated Voltage of 4,160 Volts.Caused by Voltage Regulator.Unit Was Reset & Successfully Tested ‎ (← links)
  • 05000312/LER-1980-041, Forwards LER 80-041/03L-0 ‎ (← links)
  • 05000312/LER-1989-011, :on 891021,emergency Diesel Generator a Actuated Automatically Due to Opening of Supply Breaker 4A01.Caused by Breaker Being in Test Position.Breaker Placed in Connected Position So Testing Could Resume ‎ (← links)
  • 05000312/LER-1980-040-03, /03L-0:on 800812,reactor Protection Sys Channel D Trip Signal Was Received.Caused by Amplifier Failure in Electronic Portion of Transmitter.Transmitter Replaced, Calibr,Leak Tested & Returned to Svc ‎ (← links)
  • 05000312/LER-1980-040, Forwards LER 80-040/03L-0 ‎ (← links)
  • 05000312/LER-1980-035-41, /041-0:on 800703,plant Effluent Ph Momentarily Exceeded Acceptable Operating Band.Caused by Small Vol of off-std Water Being Trapped in Waste or Dilution Water Conduits.Automatic Diversion Sys Realigns Water Offsite ‎ (← links)
  • 05000312/LER-1980-035, Forwards LER 80-035/041-0 ‎ (← links)
  • 05000312/LER-1980-034-04, /04L-0:on 800602,review of June 1980 Effluent Monitoring Charts Indicated Liquid Effluent Ph Exceeded Tech Specs.Caused by Recurring Problem ‎ (← links)
  • 05000312/LER-1980-034, Forwards LER 80-034/04L-0 ‎ (← links)
  • 05000312/LER-1980-033-04, /04T-0:on 800709,two Environ TLD Monitors Indicated Dose Rates Above Tech Spec App B Rept Level for Second Quarter 1980.Apparently Caused by Air Scattered Albedo & Location of Two Radioactive Matl Storage Trailers ‎ (← links)
  • 05000312/LER-1980-033, Forwards LER 80-033/04T-0 ‎ (← links)
  • 05000312/LER-1980-032-03, /03L-0:on 800712,during Routine Surveillance Test on Auxiliary Feedwater pump,P-318,pump Failed to Start from Control Room.Cause Undetermined.After Successfully Starting for Five Days,Pump Returned to Svc ‎ (← links)
  • 05000312/LER-1980-032, Forwards LER 80-032/03L-0 ‎ (← links)
  • 05000312/LER-1980-031-03, /03L-0:on 800703,during Review of IE Bulletin 79-14 Work,Found Stress Analysis for Nonconforming Pipe Support Was Overlooked.Caused by Design Documentation & Const Drawings Not Conforming to Seismic Analysis ‎ (← links)
  • 05000312/LER-1980-031, Forwards LER 80-031/03L-0 ‎ (← links)
  • 05000312/LER-1980-026-01, /01T-0:on 800508,ATOG Analysis Showed Calculation of Offsite Dose Following once-through Steam Generator Tube Rupture May Be Higher than FSAR Figure.Operator Guidelines & Revised FSAR Analysis Will Be Developed ‎ (← links)
  • 05000312/LER-1980-026, Forwards LER 80-026/01T-0 ‎ (← links)
  • 05000312/LER-1980-027-03, /03L-0:on 800508,during Periodic Insp of Accessible Safety Sys Hydraulic Snubbers,Discovered That Snubber Was Inoperable.Caused by Low Oil Level.No Seal Leakage Was Evident.Unit Refilled & Declared Operable ‎ (← links)
  • 05000312/LER-1980-027, Forwards LER 80-027/03L-0 ‎ (← links)
  • 05000312/LER-1978-001, Responds to NRC Expressing Concern That 780320 Transient,Reported as LER 78-1,could Have Led to Results as Serious as Tmi.Operator Recognized That once-through Steam Generators Were Dry & Therefore Admitted Main Feedwater ‎ (← links)
  • 05000312/LER-1980-017-03, /03L-0:on 800322,after Manually Opening SFV-25003 Several Turns to Increase Level in Pressurizer,Valve Failed to Close Electrically.Caused by Excessive Wear to Shaft Clutch & Clutch Gear.Defective Parts Replaced ‎ (← links)
  • 05000312/LER-1980-017, Forwards LER 80-017/03L-0 ‎ (← links)
  • 05000312/LER-1978-011, Forwards LER 78-011/01T-0 ‎ (← links)
  • 05000312/LER-1980-030-03, /03L-0:on 800623,while Performing I-108C,reactor Protection Sys Channel C Test,Overpower Bistable Voltage Setting Was Found Drifted Out of Spec.Caused by Malfunctioning of Semiconductor Voltage Regulator ‎ (← links)
  • 05000312/LER-1980-030, Forwards LER 80-030/03L-0 ‎ (← links)
  • 05000312/LER-1978-011-01, /01T-0:on 780914,required Continual Fire Watch Erroneously Terminated.Caused by Shift Personnel Misunderstanding.Personnel Instructed ‎ (← links)
  • 05000312/LER-1977-016-03, /03X-1:on 780105,fluid Leakage Discovered on 781129 Traced to Failing Polyurethene O-ring.All Bergen- Patterson Snubber Polyurethane Seals Were Replaced w/ethylene-propylene Seals.Apparently One Seal Was Missed ‎ (← links)
  • 05000312/LER-1977-012-03, /03X-1:on 771001,borated Water Storage Tank Isolation Valve Motor Operator Failed.Caused by Manual Operation.Damaged Parts Replaced & Operator Returned to Svc. Automatic Cycling Restrictions Imposed.Updates RO-77-12 ‎ (← links)
  • 05000312/LER-1978-005-01, /01T-0:on 780509,four Main Steam Code Safety Valves Found Improperly Set in Nonconservative Direction. Caused by Procedural Inadequacy.Maint Procedure Included Hydroset Curve for One Type Orifice.Procedure Revised ‎ (← links)
  • 05000312/LER-1977-012, Forwards LER 77-012/03X-1 ‎ (← links)
  • 05000312/LER-1980-029-04, /04T-0:on 800519,May 1980 Effluent Monitoring Charts Indictaed Effluent Ph Exceeded 8.5 Tech Spec Limit. Caused by Ph Fluctuations in Dilution Water,Common Phenomenon in Summer Months ‎ (← links)
  • 05000312/LER-1980-029, Forwards LER 80-029/04T-0 ‎ (← links)
  • 05000312/LER-1980-028-01, /01T-0:on 800609,review of Safety Features Actuation Sys Revealed That If One Inverter Was Out of Svc, Failure of Remaining Inverter Would Disable Sys.Operational Restrictions Placed on Inverter Operability ‎ (← links)
  • 05000312/LER-1980-028, Forwards LER 80-028/01T-0 ‎ (← links)
  • 05000312/LER-1978-002-04, /04T-0:on 780414,hypochlorite Spilled & Flushed Into Drain Sys During Hypochlorite Chemical Tank Filling, Causing Chlorine Levels to Exceed Limits.Fill Line Will Be Capped Prior to Removal & Spills Will Not Be Flushed ‎ (← links)
  • 05000312/LER-1978-001-04, /04T-0:on 780109,plant Liquid Effluent Ph Levels Exceeded Tech Spec 8.5 Limit.Ph Sensor Setpoint Raised in Summer to Folson South Canal Ph Level & Not Reset When Ph Level Dropped,Eliminating Automatic Diversion Feature ‎ (← links)
  • 05000312/LER-1978-007-03, /03L-0:on 780622,frequent Makeup Tank Level Changes Observed.Caused by Excessive Leakage from B Decay Heat Removal Sys Pump Seal.Pump Valved Out & Sys a Continued Operation.Leaking Seal Replaced ‎ (← links)
  • 05000312/LER-1978-002-03, /03L-0:on 780228,safety Sys Hydraulic Snubbers 25 & 26 Found Low on Fluid During Visual Insp.No Leakage Found. Cause Not Determined.Snubbers Refilled & Surveillance Interval Reduced to Six Months ‎ (← links)
  • 05000312/LER-1978-002, Forwards LER 78-002/03L-0 ‎ (← links)
  • 05000312/LER-1980-025-03, /03L-0:on 800502,review of Applicabilty of IE Info Notice 80-13 Revealed 29 GE Type SBM Switches in safety-related Switchgear.Eight Cracked in Cam Followers. Caused by Exposure to Hydrocarbons in Mfg Process ‎ (← links)
  • 05000312/LER-1980-025, Forwards LER 80-025/03L-0 ‎ (← links)
  • 05000312/LER-1980-019-03, /03L-0:on 800406,during Performance of Sp 203.01A, Sfas Digital Channel 1A Refueling Test Breaker for a Nsrw Pump P-472A Did Not Close.Caused by Accumulation of Old Lubricant & Dirt on Closing Linkage.Linkage Cleaned ‎ (← links)
  • 05000312/LER-1980-019, Forwards LER 80-019/03L-0 ‎ (← links)
  • 05000312/LER-1980-024-03, /03L-0:on 800409,during Performance Test,A Generator Failed to Meet Time Criteria to Reach Full Voltage.Caused by Uncoupled Governor Accumulator Booster Pump.New Coupling Fabricated & Installed ‎ (← links)
  • 05000312/LER-1980-024, Forwards LER 80-024/03L-0 ‎ (← links)
  • 05000312/LER-1980-022-03, /03L-0:on 800406,refueling Test Revealed Valve Sfv 53603 Returned to Open Position After Signal Reset.Caused by Sticking Blpb Open Contacts.Blpb Replaced & Valve Successfully Tested ‎ (← links)
  • 05000312/LER-1980-022, Forwards LER 80-022/03L-0 ‎ (← links)
  • 05000312/LER-1980-023-01, /01T-0:on 800414,vendor Notified Util That Representation for Specific Valves Will Not Be Provided Re Reliability & Operation for Other than Saturated Steam Svc. Cause Not Stated.Test Program Will Be Conducted ‎ (← links)
  • 05000312/LER-1980-023, Forwards LER 80-023/01T-0 ‎ (← links)
  • 05000312/LER-1980-018-03, /03L-0:on 800324,pressurizer Gas Sample Valve, SFV-72502 Failed to Close.Caused by Wire Separation in Valve Control Circuitry.Wire Reconnected to Terminal Lug ‎ (← links)
  • 05000312/LER-1980-018, Forwards LER 80-018/03L-0 ‎ (← links)
  • 05000312/LER-1980-021-04, /04T-0: on 800318,review of Previous Month Plant Effluent Records Indicated That Effluent Ph Exceeded 8.5 for Approx 3-h.Caused by Canal Pumping Station Being Out of Svc for Approx Two Months ‎ (← links)
  • 05000312/LER-1980-021, Forwards LER 80-021/04T-0 ‎ (← links)
  • 05000312/LER-1980-015-01, /01T-0:on 800312,during Visual Insp of Cycle 3 Discharge Fuel,Approx 4 Inches of Cladding Discovered Missing from Fuel Assembly 1C47.Caused by Cladding Defect on One Pin.Insignificant Amounts of Fuel Dispersed ‎ (← links)
  • 05000312/LER-1980-015, Forwards LER 80-015/01T-0 ‎ (← links)
  • 05000312/LER-1978-001-01, /01T-0:on 780320,non-nuclear Instrumentation Dc Power Short Resulted in Reactor Trip & RCS Cooldown in Excess of Tech Spec Figure 3.1.2-2 Limits.Caused by Operator Changing Lightbulb.Conditions Imposed for Return to Power ‎ (← links)
  • 05000312/LER-1980-016-03, /03L-0:on 800310,while Performing IE Bulletin 79-14 Requirements,Seismic Analysis of Supports 1S-50052-1A, 1S-50062-1A & 1S-23626-1 Indicated Seismic Stress Would Exceed Allowable Limit.Supports Modified ‎ (← links)
  • 05000312/LER-1980-016, Forwards LER 80-016/03L-0 ‎ (← links)
  • 05000312/LER-1980-012-03, /03L-0:on 800219,diesel Generator a Failed to Start from Control Room Due to Piece of Metal Stuck in Relay.Caused by Recent Work in Relay Panel.Metal Removed & Subsequent Start Tests Successful ‎ (← links)
  • 05000312/LER-1980-012, Forwards LER 80-012/03L-0 ‎ (← links)
  • 05000312/LER-1980-011-03, /03L-0:on 800201,B&W Inservice Insp of Steam Generators Found Three Defective Tubes in First Sampling. Caused by Normal Wear of Generator Tubes.Addl Insp Found No Other Defective Tubes.Three Tubes Plugged ‎ (← links)
  • 05000312/LER-1980-011, Forwards LER 80-011/03L-0 ‎ (← links)
  • 05000312/LER-1979-002-03, /03L-0:on 790205,redundant Unit A-500C Failed to Start,During Test of Reactor Bldg Emergency Cooler.Caused by Improperly Set Overcurrent Relay.Relay Reset, & Unit Retested & Declared Operable ‎ (← links)
  • 05000312/LER-1980-007-03, /03L-0:on 800125,refueling Cycle Hydraulic Snubber Testing Program Revealed Seven Failed Units.Caused by Broken Springs,Worn Poppets & Seats & Worn O Rings.Defective Parts Replaced & Retested ‎ (← links)
  • 05000312/LER-1980-007, Forwards LER 80-007/03L-0 ‎ (← links)
  • 05000312/LER-1980-005-03, /03L-0:on 800117,w/reactor in Cold Shutdown for Refueling Outage,Excessive Leakage Observed from Outboard Seal of Decay Heat Removal Pump A,P-261A.Seal Replaced,Sys Tested & Declared Operable ‎ (← links)
  • 05000312/LER-1980-005, Forwards LER 80-005/03L-0 ‎ (← links)
  • 05000312/LER-1980-006-01, /01T-0:on 800204,lab Results of Failed Stainless Steel Stud from Anchor Valve Co Valve Indicated Potential Problem Re Premature Stud Failure.Caused by Improper Temp for Heat Treating During Mfg.More Testing in Progress ‎ (← links)
  • 05000312/LER-1980-006, Forwards LER 80-006/01T-0 ‎ (← links)
  • 05000312/LER-1980-004-03, /03L-0:on 800112,evaluation of Seven Consecutive RCS Leakrates Indicated Leak Rates in Excess of 1 Gallon Per Minute Resulting in Shutdown of Reactor.Probably Caused by Packing Leak in Pressurizer Spray Valve PV-21509 ‎ (← links)
  • 05000312/LER-1980-004, Forwards LER 80-004/03L-0 ‎ (← links)
  • 05000312/LER-1980-003-03, /03L-0:on 800109,while Out of Svc for Fire Protection Mods,Hpi Pump B Was Restored to Standby.Makeup Pump Was Realigned to Normal.Caused by Operator Error. Standing Order Issued ‎ (← links)
  • 05000312/LER-1980-003, Forwards LER 80-003/03L-0 ‎ (← links)
  • 05000312/LER-1980-008-03, /03L-0:on 800203,during Routine Tour of Reactor Bldg,U Bolt Bracket Found Missing on Pipe Support 1-G-26085-1.Probably Caused by Removal During Some Past Maint Evolution or During Const ‎ (← links)
  • 05000312/LER-1980-008, Forwards LER 80-008/03L-0 ‎ (← links)
  • 05000312/LER-1979-017-03, /03L-0:on 791109,during Routine Operation,Diesel Generator a Failed to Start from Control Room.Cause Undetermined Because Major Factors Affecting Starting Capabilities Appeared Normal.No Recurrence of Problem ‎ (← links)
  • 05000312/LER-1979-017, Forwards LER 79-017/03L-0 ‎ (← links)
  • 05000312/LER-1978-017-03, /03L-0:on 781215,during Refueling Shutdown, Blowdown Heat Transfer Pump Started & Sys Subjected to Sizable Water Hammer.Caused by Incomplete Valve Lineup. Hangers & Failed Snubber Repaired, & Personnel Notified ‎ (← links)
  • 05000312/LER-1978-017, Forwards LER 78-017/03L-0 ‎ (← links)
  • 05000312/LER-1979-005-03, /03L-0 on 790509:two Inaccessible Safety Sys Hydraulic Snubbers Were Inoperable.Cause Unknown.One Snubber Rebuilt & Tested;Other Snubber Refilled ‎ (← links)
  • 05000312/LER-1979-005, Forwards LER 79-005/03L-0 ‎ (← links)
  • 05000312/LER-1979-006-04, /04T-0:on 791214,plant Effluent Sample Indicated 0.6 mg/1 of Chlorine & Followup Sample at Site Boundary Indicated 0.5 mg/1.Caused by Inadequate Dilution When Sewage Sys Discharged to Effluent.Normal Dilution Instituted ‎ (← links)
  • 05000312/LER-1979-006, Forwards LER 79-006/04T-0 ‎ (← links)
  • 05000312/LER-1979-018-03, /03L-0:on 791117,during Periodic Visual Insp, Snubber 129 Found Inoperable Due to Lack of Oil.Caused by Loose lock-nut Which Allowed Unit to Rotate.Unit Will Be Modified During 1980 Refueling Outage to Secure Lock ‎ (← links)
  • 05000312/LER-1979-018, Forwards LER 79-018/03L-0 ‎ (← links)
  • 05000312/LER-1979-001-01, /01T-0:on 790129,RCS Cooldown Occurred at 120 F/H. Caused by Short Circuit Resulting in Reactor Trip.Procedure Mods Developed to Prevent Recurrence ‎ (← links)
  • 05000312/LER-1979-001, Forwards LER 79-001/01T-0 ‎ (← links)
  • 05000312/LER-1979-003-04, /04T-0:on 791120,plant Effluent Sample Exceeded Tech Spec Limit of 0.2 Mg/L Chlorine.Caused by Excessive Flow in Plant Sewage Sys ‎ (← links)
  • 05000312/LER-1979-003, Forwards LER 79-003/04T-0 ‎ (← links)
  • 05000312/LER-1979-001-04, /04L-0 on 790529:plant Liquid Effluent Ph Exceeded 8.5 Limit.Probably Caused by Error Band Associated W/Ph Alarm Setpoint.Investigation Feasibility of Reducing Error Band ‎ (← links)
  • 05000312/LER-1979-005-04, /04T-0:on 791205,plant Effluent Sample Indicated Excess Amount of Chlorine at Site Boundary.Caused by Misunderstanding Between Chemistry & Operations Personnel Re Chlorine Specs.Recurring Problems W/Chlorine Under Review ‎ (← links)
  • 05000312/LER-1979-019-03, /03L-0:on 791125,during Routine Plant Equipment Insp,Discovered Weld Leak on Seal Injection Line.Cause Not Stated.Defective Portion of Weld Ground Out & Weld Dye Penetrant Checked ‎ (← links)
  • 05000312/LER-1979-019, Forwards LER 79-019/03L-0 ‎ (← links)
  • 05000312/LER-1979-004-04, /04T-0:on 791203,plant Effluent Samples Indicated Chlorine Levels Exceeded Tech Spec Limits.Caused by Partial Blockage of Sewage Sys Inlet Line.Dilution Flow Increased & Sewage Sys Hypochlorite Pump Stroke Reduced ‎ (← links)
  • 05000312/LER-1979-004, Forwards LER 79-004/04T-0 ‎ (← links)
  • 05000312/LER-1979-016-03, /03L-0:on 791101,during Periodic Visual Insp of Accessible Safety Sys Hydraulic Snubbers,Snubbers 12 & 14 Determined Inoperable.Cause Unstated.Snubber 12 Rebuilt & Tested.Snubber 14 Refilled to Proper Level ‎ (← links)
  • 05000312/LER-1979-016, Forwards LER 79-016/03L-0 ‎ (← links)
  • 05000312/LER-1980-001-03, /03L-0:on 800102,while Performing Requirements of IE Bulletin 79-02,found Support Did Not Meet Criteria 2, Making HPI B Sys Inoperable.Caused by Design Error.Pipe Support Modified ‎ (← links)
  • 05000312/LER-1979-025-03, /03L-0:on 791227,during Verification of Test Data, Discovered Test SP205.02 Had Not Been Performed on Date Schedule Indicated.Caused by Error Made While Updating Surveillance Schedule.Rescheduled & Performed Tests ‎ (← links)
  • 05000312/LER-1980-001, Forwards LER 80-001/03L-0 ‎ (← links)
  • 05000312/LER-1979-025, Forwards LER 79-025/03L-0 ‎ (← links)
  • 05000312/LER-1979-023-03, /03L-0:on 791217,while Isolating HPI Pump B to Facilitate Fire Protection mods,SIM-038 & SIM-039 Valves Were Closed,Possibly Compromising 10-minute Criteria of Specific ECCS Actuation.Caused by Operator Error ‎ (← links)
  • 05000312/LER-1979-023, Forwards LER 79-023/03L-0 ‎ (← links)
  • 05000312/LER-1980-002-01, /01T-0:on 800104,while Performing Requirements of IE Bulletin 79-02,discovered That Pipe Support Did Not Meet Criteria 2.Caused by Differences in Design Criteria.Support Modified to Upgrade Safety Factor ‎ (← links)
  • 05000312/LER-1980-002, Forwards LER 80-002/01T-0 ‎ (← links)
  • 05000312/LER-1979-021-03, /03L-0:on 791216,axial Power Shaping Rods Withdrawn Seven Days Earlier than Allowed Due to Error in Effective Full Power Day Calculations.Probably Caused by Crud on Feedwater Tubes.Tubes Inspected ‎ (← links)
  • 05000312/LER-1979-021, Forwards LER 79-021/03L-0 ‎ (← links)
  • 05000312/LER-1979-020-03, /03L-0:on 791207,during Routine Insp of Plant Equipment,Weld Leak on Seal Injection Line Discovered.Caused by Previous Repair Problem or vibration-induced Stress.New Pipe Nipple & Socket Weld Cap Installed ‎ (← links)
  • 05000312/LER-1979-020, Forwards LER 79-020/03L-0 ‎ (← links)
  • 05000312/LER-1979-012-03, /03L-0:on 791005,while Testing Anchor Bolts Per IE Bulletin 79-02,Region 5 Noted Excessive Failure Rates. Probably Caused by Const Installation.Discrepancies Being Corrected.Failure Criteria re-evaluated by Util ‎ (← links)
  • 05000312/LER-1979-012, Forwards LER 79-012/03L-0 ‎ (← links)
  • 05000312/LER-1978-018-03, /03L-0:on 781221,while Increasing Power After Second Refueling Outage,Rcs Flow Indicator a Unusually Steady & Spurious Alarms Received.Caused by Operator Error. Transmitter Returned to Svc & Operator Instructed ‎ (← links)
  • 05000312/LER-1978-018, Forwards LER 78-018/03L-0 ‎ (← links)
  • 05000312/LER-1978-010-01, /01T-0 on 780914:During Normal Oper It Was Found That Fire Hydrant 3 Hose Cabinet Had Not Been Relocated W/Hydrant.Upon Discovery of Discrepancy Hose Cabinet Was Relocated ‎ (← links)
  • 05000312/LER-1978-010, Forwards LER 78-010/01T-0 ‎ (← links)
  • 05000312/LER-1979-007-01, /01T-0:on 790720,during Normal Operation,Analysis of Pipe Support Base Plate Design Using Concrete Expansion Anchor Bolts Indicated That Six safety-related Anchors at Facility Failed to Meet IE Bulletin 79-02,Criterion 2 ‎ (← links)
  • 05000312/LER-1979-007, Forwards LER 79-007/01T-0 ‎ (← links)
  • 05000312/LER-1979-006-02, /02T-0:on 790720,B&W Informed District That Addl Small Break LOCA Analyses Indicated That Certain Spectrum of Small Leaks in RCS Coupled W/Loss of Reactor Coolant Pumps Later in Transient Could Cause 10CFR50,App K to Be Exce ‎ (← links)
  • 05000312/LER-1979-015-03, /03L-0:on 791031,A/E Informed Util That as-built Configuration of Line 47360-10 Inch,When Seismically Reanalyzed,May Result in Pipe Support Overstress.Caused by Nonconformance of Const Drawings.New Support Installed ‎ (← links)
  • 05000312/LER-1979-015, Forwards LER 79-015/03L-0 ‎ (← links)
  • 05000312/LER-1979-002-04, /04T-0:on 791024,plant Effluent Sample Indicated Excessive Chlorine.Caused by Failure to Take Comparison Site Boundary Sample.Sampling Personnel Reinstructed ‎ (← links)
  • 05000312/LER-1979-002, Forwards LER 79-002/04T-0 ‎ (← links)
  • 05000312/LER-1979-013-01, /01T-0:on 791101,while Analyzing Onsite Power Distribution Sys,Identified Possible Discrepancy in Event of Degraded Voltage Condition on Grid.Caused Unstated.Relay Reset ‎ (← links)
  • 05000312/LER-1979-013, Forwards LER 79-013/01T-0 ‎ (← links)
  • 05000312/LER-1979-014-03, /03L-0:on 791008,as-built Configuration of Line 48222-18,when Seismically Reanalyzed,Resulted in Probable Support Pipe Overstresses.Caused by Design Documentation & Const Drawings Not Conforming W/Seismic Analyses ‎ (← links)
  • 05000312/LER-1979-014, Forwards LER 79-014/03L-0 ‎ (← links)
  • 05000312/LER-1979-011-03, /03L-0:on 790830,breaker 523A14 Was Inoperative Due to Connect Switch in Off Position,Causing Springs to Be Uncharged.Caused by Inadvertent Repositioning of Switch.Log Sheets Initiated for Verification ‎ (← links)
  • 05000312/LER-1979-011, Forwards LER 79-011/03L-0 ‎ (← links)
  • 05000312/LER-1979-010-03, /03L-0:on 790829,bulbs for Pump P-4828 Were Not Lit.Dc Control Power Breaker Was in Off Position.Caused by Breaker Inadvertently Shut Off While Performing Maint on Another Breaker in Same Cubicle.Power Restored ‎ (← links)
  • 05000312/LER-1979-010, Forwards LER 79-010/03L-0 ‎ (← links)
  • 05000312/LER-1979-009-03, /03L-0:on 790814,contrary to Tech Specs,Borated Water Storage Tank Had Less than Specified Boron Concentration.Reactor Shutdown Initiated & Boric Acid Added to Tank,Bringing Concentration Above Limit ‎ (← links)
  • 05000312/LER-1979-009, Forwards LER 79-009/03L-0 ‎ (← links)
  • 05000312/LER-1980-049, Forwards LER 80-049/03L-0 ‎ (← links)
  • 05000312/LER-1982-026-04, /04T-0:on 821006,review of Plant Effluent Records Disclosed Ph Reading of 6.2 for Less than 15 Minutes on 820918.Caused by Leaks at Two Elbows in Acid Line Running from Storage Tank to Turbine Bldg.Leaks Repaired ‎ (← links)
• 05000312/LER-1982-003, Forwards LER 82-003/01T-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-002-03, /03L-0:on 820130,snubbers 1SW-21007-7 & 1SW-23823-13A Failed Visual Insps.Caused by Low Fuel Level. Snubber 1SW-21007-7 Rebuilt & Passed.Snubber 1SW-23823-13A Failed Until Bechtel Developed New Criteria ‎ (← links)
• 05000312/LER-1982-002, Forwards LER 82-002/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-023-03, /03L-0:on 820909,weekly Nitrogen Sys Surveillance Showed Xe-133 Activity in Auxiliary Bldg Nitrogen Header. Cause Undetermined.Investigation Will Be Conducted.Followup Rept on Cause & Corrective Actions Will Be Provided ‎ (← links)
• 05000312/LER-1982-023, Forwards LER 82-023/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-029-03, /03L-0:on 821026,QA Dept Reported That Portion of Auxiliary Feedwater Start Circuit Was Not Being Tested Per Requirements.Caused by Transposed Requirements in Tech Specs.Tech Specs Will Be Amended ‎ (← links)
• 05000312/LER-1982-027-03, /03L-0:on 821012,weekly Surveillance of Nitrogen Sys Revealed Presence of Contamination in Form of Xe-133. Cause Undetermined.Sys Purged & Activities Reduced to Below Detectable Levels.Investigation Underway.Rept Will Follow ‎ (← links)
• 05000312/LER-1982-029, Forwards LER 82-029/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-027, Forwards LER 82-027/03L-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-028-99, /99X-0:on 820922,small Pieces of Matl Resembling Paint Chips Observed During Flow Control Valve Repair in Auxiliary Bldg Fire Protection Sys.Probably Caused by Detached Liner Matl.Piping to Be Inspected & Repaired ‎ (← links)
• 05000312/LER-1982-028, Forwards LER 82-028/99X-0.Detailed Event Analysis Submitted ‎ (← links)
• 05000312/LER-1982-026-04, /04T-0:on 821006,review of Plant Effluent Records Disclosed Ph Reading of 6.2 for Less than 15 Minutes on 820918.Caused by Leaks at Two Elbows in Acid Line Running from Storage Tank to Turbine Bldg.Leaks Repaired ‎ (← links)