NRC 2003-0025, Supplement to Generic Letter 96-06 Resolution
05000298/LER-1989-011, :on 890220,as-found Differential Pressure for RHR Pumps a & C Found Above Required Action Level.Caused by Personnel error.On-duty Shift Supervisor Counseled & Shift Supervisors Required to Review Procedures
05000286/LER-1989-007, :on 890321,unauthorized Access Into Protected Area by Former Employee Utilizing Photo Identification Badge of Another Contract Employee Occurred.Caused by Security Guard Error.Security Retrained
05000259/LER-1987-006, :on 870302,discovered That Routine Flow Rate Surveillance on Control Room Emergency Ventilation Train B Performed Incorrectly Night Before.Caused by Personnel Error.Flow Measured & Correctly Set
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
05000414/LER-1987-001-04, :on 870126,two Ice Condenser Intermediate Deck Doors Exceeded Opening Force Requirements on 861118.Caused by Personnel Error.Personnel Counseled on Need to Follow Procedures
05000244/LER-1986-011, :on 861128,MSIV Inadvertently Closed,Causing Pressurizer High Pressure Reactor Trip.Caused by Personnel Error.Event Discussed W/Personnel
05000327/LER-1986-011-01, :on 860328,review of Tech Spec Surveillance Noted That Setpoint for Containment Sump Level in Error as Listed in Limiting Condition for Operation 3.3.2.1.Caused by Error in Instrument Mounting Drawing
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
05000293/LER-1987-023, :on 870917,automatic Actuation of Emergency Diesel Generator a Occurred.Caused by Procedural Deficiency. Procedure 3.M.3-1,Attachment V Revised to Add Addl Info to Caution Statement
05000333/LER-1986-001, :on 860302,at 100% Power,Flow Bias Functional Test Discovered Not Performed Since 850609.Caused by Inadvertent Schedule Ommission While Shifting Between Run & Not Run Mode Testing.Audit Performed
05000317/LER-1988-002-02, :on 880502,four Unplanned Safety Injection Actuation Signal Received & Initiated by Esfas.Caused by Interaction Between Established Sys Conditions.Procedures, Planning & Task Sequencing Improved
05000414/LER-1988-017-01, :on 880424,main Feedwater Isolation Occurred Due to hi-hi Level Turbine Trip Signal from Steam Generator. Caused by Personnel Error.Steam Generator Levels Brought Under Control Using Auxiliary Feedwater
05000282/LER-1988-002-01, :on 880421,auto Start of Diesel Driven Cooling Water Pumps Occurred When Low Cooling Water Header Pressure Sensed.Cause Unknown.Pump Packing Adjusted,Educator Trap Replaced & Eductor Vacuum Increased
05000482/LER-1988-011, :on 880701,ESF Actuation Control Room Ventilation Isolation Signal Occurred.Caused by Broken Sensitive Paper Tape.Paper Tape Replaced & Monitor Returned to Operation
05000323/LER-1985-024-01, :on 851225,automatic Reactor & Turbine Trips Occurred During Full Load Rejection Test.Caused by Slow Response of Steam Dump Control Sys.Sys Modified to Improve Steam Dump Valve Response Time
05000325/LER-1985-042, :on 850725,discovered That Procedural Mechanism Did Not Exist to Update Acceptance Test Values in Periodic Test Following Replacement or Relocation of Cells.Caused by Misinterpretation of Testing Requirement
05000483/LER-1985-034, :on 850718,trip Occurred as Result of Power Range High Negative Flux Rate Signal.Caused by Inadequate Cooling of Rod Drive Power Cabinet.Caution Tag Added to Handswitch Controlling Room Cooler
05000328/LER-1984-020, :on 841216,inadvertent Train a Safety Injection & Reactor Trip Occurred During Valve Reseating.Caused by Personnel Error Malfunctioning Safety Injection Handswitch. Switch Repaired
05000341/LER-1985-011, :on 850427,two Reactor Protection Sys Actuations Occurred from Source Range Monitor Upscale Trips. Caused by radio-frequency Signal from Test Equipment. Procedure Revised to Prevent Reoccurrence
05000413/LER-1992-012-01, :on 921201,02 & 08,auxiliary Feedwater Sys turbine-driven Pumps Declared Inoperable.Caused by Unanticipated Interaction of Sys or Components During Design Analysis.Permanent Mod to Sys Installed
05000458/LER-1992-025, :on 921110,operating Chiller in Division II, HVK*CHL1B Tripped Due to Indicated Motor Overcurrent Condition.Caused by Faulty Connection on Overcurrent Trip Device.Counseling Provided
05000416/LER-1985-015, :on 850404,RCIC Sys Inadvertently Isolated When Bypass Switch Mistakenly Returned to Normal During Testing.Caused by Misunderstanding Between Personnel.Sys Restored.Need for Clear Communication Stressed
05000293/LER-1984-015, :on 840929,during Refuel Outage,Unplanned Actuation of Containment Spray Sys Occurred.Caused When Electrician Stroked Upper Drywell Outboard Isolation Valve. Personnel Counseled
05000325/LER-1995-010, :on 950511,loss of RPS Bus a Power & ESF Actuations Occurred Due to Defective Procedures.Operating Procedures Revised to Provide Addl Info for Transferring DG Governor
05000412/LER-1991-003-01, :on 910724,ESF Actuation Trip Occurred During Surveillance Testing of Containment Air Recirculation Fan. Caused by Personnel Lifting Wrong Lead to Fan.Fan Restarted & Operator Counseled & Received Reprimand
05000446/LER-1994-011, :on 940722,discovered TS Surveillance Testing of Solid State Logic Protection Sys Had Not Satisfied Test Basis Requirement.Caused by Personnel Error.Personnel Involved Counselled
05000325/LER-1994-002-01, :on 940117,common Control Bldg Heating Ventilation & Air Conditioning Air Conditioners Tripped. Caused by Gradual Decrease in Refrigerant Charge Pressure During Yrs of Svc.Pressure Range Established
05000382/LER-1994-009-01, :on 940218,SRO Discovered Object Hanging from Spent Fuel Handling Machine.Caused by Inadequate Barriers. Power Strip to Computer Deengergized
05000263/LER-1989-021-01, :on 890916,crack Was Discovered on Upper Support Brace of Jet Pump.Caused by High Cycle Fatigue. Corrective Action:Recirculation Pump Speed Was Limited & Testing Demonstrated Cracking Is self-limiting
05000324/LER-1994-001-01, :on 940131,hardened Wetwell Vent Line Isolation Valve CAC Did Not Have PCIS Group 6 Isolation Label & Logic Not Functionally Tested.Caused by Personnel Error.Temporary Revision to PT 4.1.1 Performed Satisfactorily
05000338/LER-1978-117-03, /03L-0 on 781101:main Steam Trip Valve 1-TV-MS-111A Was Detected Leaking Due to a Deteriorated Internal Gasket.Valve Was Isolated & Gasket Replaced
05000325/LER-1993-012, :on 930928,Group 1 Isolation Signal Generated Due to Resetting Main Turbine for Testing.Caused by Defective Procedure.Operating Procedure 50 Will Be Revised
05000285/LER-1990-011, :on 900402,inadvertent Actuation of Pressurizer Pressure Low Signal Occurred While Performing Calibr Procedure.Caused by Inappropriate Action by Technician Involved.Validation of Procedures Reviewed
05000440/LER-1993-010, :on 930326,manual Reactor Scram Inserted Due to Rupture in 30 Inch Section of Underground SW Piping.Caused by Pipe Bending Due to Localized Loss of Soil Support. Failed Portion of SW Piping Being Repaired
05000336/LER-1979-019-03, /03L-0 on 790627:at Completion of Surveillance Test,Output Breaker for 12U Emergency Diesel Generator Could Not Be Opened Remotely from Control Room.Caused by Loose Wire Connection in Trip Coil
05000341/LER-1987-046, :on 870820,identified Deficiencies in Raychem Installations.Caused by Inadequacies in Training of Raychem Installers,Lack of Insp Requirement & Previous Specification Deficiencies.Installations Repaired & Replaced
05000370/LER-1988-005-03, :on 880615,2B Diesel Generator Fire Door Blocked Open W/O Posting of Fire Watch Tag.Caused by Personnel Error.Process for Identifying Fire Doors & Actions That Should Be Taken Reiterated to Paint Crews
05000370/LER-1988-006-04, :on 880718,ESF Actuation Occurred.Caused by Personnel Failure to Take Appropriate Action.Change to Procedures OP/1,2/A/6250/03A & OP/1,2/A/6100/01 Implemented
05000311/LER-1984-013, :on 840511,reactor Trip Occurred While Troubleshooting & Calibr Steam Generator narrow-range Level Recorder 22.Caused by Personnel Error.Troubleshooting/Calibr Check Off Sheets Provided to Reduce Accidents
05000324/LER-1994-004, :on 940329,results of LLRT Indicated That Leakage on MSL Exceeded TS Limits Due to Scratches & Pitting Identified in Sealing Area of in-body Seats & Discs.Actuator Guide Tube Assemblies Were Removed