Pages that link to "05000289/LER-2014-001, Regarding Unfused DC Motor Control Circuits"
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The following pages link to 05000289/LER-2014-001, Regarding Unfused DC Motor Control Circuits:
Displayed 3 items.
- 05000289/LER-2014-001 (redirect page) (← links)
- ENS 50059 (← links)
- ENS 50108 (← links)
- 05000289/LER-2006-001 (← links)
- 05000289/LER-2001-003 (← links)
- 05000289/LER-2001-002 (← links)
- 05000289/FIN-2015001-01 (← links)
- IR 05000245/2016008 (← links)
- IR 05000336/2016007 (← links)
- IR 05000289/2015001 (← links)
- ML16258A175 (← links)
- 05000289/LER-1982-010, Forwards LER 82-010/99X-0 (← links)
- 05000289/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000289/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000289/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000289/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000289/LER-1978-031, Forwards LER 78-031/04T-0 (← links)
- 05000289/LER-1978-027, Forwards LER 78-027/01T-0.W/o Encl (← links)
- 05000289/LER-1978-030, Forwards LER 78-030/03L-0 (← links)
- 05000289/LER-1978-029, Forwards LER 78-029/01T-0 (← links)
- 05000289/LER-1978-026, Forwards LER 78-026/03L-0 (← links)
- 05000289/LER-1978-024, Forwards LER 78-024/01T-0 (← links)
- 05000289/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000289/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000289/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000289/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000289/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000289/LER-1982-011, Forwards LER 82-011/99X-0 (← links)
- 05000289/LER-1978-013, Forwards LER 78-013/01T-0 (← links)
- 05000289/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000289/LER-1983-044, Forwards LER 83-044/01T-1.Info Potentially Relevant to Plant Design & Procedures Phase of Proceeding.Svc List Encl (← links)
- 05000289/LER-1995-001, Forwards LER 95-001 Re Rc Leak Caused by Failure of Parker Hannifin Instrument Tube Compression Fitting That Was Found Inadequately Tightened (← links)
- 05000289/LER-1983-046, Revised LER 83-046/01T-1:on 831214,nuclear safety-related Circuit for make-up Pump Lube Oil Pressure Trip Found Incorrectly Routed.Caused by Design Oversight.Circuits for make-up Pumps Rerouted in Raceways (← links)
- 05000289/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000289/LER-1983-011, Forwards LER 83-011/01T-0 (← links)
- 05000289/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000289/LER-1982-008, Forwards LER 82-008/01T-0 (← links)
- 05000289/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000289/LER-1983-008, Forwards LER 83-008/01T-0 (← links)
- 05000289/LER-1984-004, Forwards Corrected LER 84-004-00 Re Misplugged Steam Generator Tubes.Rept Date Corrected & Licensee Contact Changed (← links)
- 05000289/LER-1983-005, Forwards LER 83-005/01T-0 (← links)
- 05000289/LER-1978-008, Forwards LER 78-008/01T-0 (← links)
- 05000289/LER-1997-001, Forwards Corrected Copy of LER 97-001-00 Re Condition Found During Review of GL 96-06 (← links)
- 05000289/LER-1997-006, Forwards LER 97-006-00,resulting from Violation of TS 3.3 & Declaring Reactor Bldg fans,AH-E-1B & C,Inoperable on 970424 (← links)
- 05000289/LER-1991-008, Forwards LER 91-008-00 Re Missed Surveillance for Core Flood Tank Samples.Ler Submitted Per Interim Util Policy Issued in Response to Violations Noted in Insp Rept 50-289/92-20 (← links)
- 05000289/LER-1981-013, Forwards LER 81-013/01T-0 Re Leaking Found in Steam Generators.Event Reportable Per Tech Spec 6.9.2.A(3). Supporting Documentation Encl (← links)
- 05000289/LER-1998-010, Forwards LER 98-010-00 Re Potential Violation of Design Criteria During Single Auxiliary Transformer Operation Reported on 980825.Second & Associated Issue Was Identified & Reported on 980916,as Suppl Info IAW 10CFR50.72(c) (← links)
- 05000289/LER-1998-009, Forwards LER 98-009-00 Re Potential Loss of HPI During Postulated LOCA with Most Limiting Single Failure.Caused by Misapplication of Design Inputs When Operating Procedures Were Changed Prior to Startup for Current Operating Cy (← links)
- 05000289/LER-1998-008, Forwards LER 98-008-00,re Radiation Monitor RM-A8G-High Which Was Inoperable for More than 7 Days Due to Less than Adequate Performance of Calibr Surveillance (← links)
- 05000289/LER-1997-010, Forwards LER 97-010-00,concerning Inoperable PORV Resulting from Violation of TS 4.2.2,in that,post-maintenance Test Was Not Performed on PORV Following Replacement During 11R Refueling (← links)
- 05000289/LER-1999-001, Forwards LER 99-001-00,re Short Sections of Piping Were Below Temps Specified in FSAR Section 9.2.1.2.LER Is follow-up to Notification Made Via ENS Telephone to NRC on 990122 (← links)
- 05000289/LER-1999-003, Forwards LER 99-003-00, Discovery of Condition Outside UFSAR Design Basis for CR Habitability, Which Was Determined Reportable on 990310.Rept Is Being Submitted Four Weeks Later than Required,Per Discussion with NRC (← links)
- 05000289/LER-1998-007, Forwards LER 98-007-00, Inoperable Intake Screen & Pump House Floor Drain Check Valves Due to Lack of Preventive Maint & Periodic Insps, Per 10CFR50.73.Rept Was Evaluated & Determined Reportable on 980720.W/o Encl (← links)
- 05000289/LER-1998-005, Forwards LER 98-005-00 Re Inoperable Fire Dampers Determined Reportable on 980416.No New Commitments Made within Ltr (← links)
- 05000289/LER-1998-006, Forwards LER 98-006-00,re Thermo-Lag Fire Barrier That Was Found Installed Outside Approved Joint Design Arrangement (← links)
- 05000289/LER-1997-009, Forwards LER 97-009-00,re Condition Which Was Evaluated & Determined to Be Reportable on 970725.Condition Was Identified as Result of Review of Crystal River 3 LER for Applicability at TMI-1 (← links)
- 05000289/LER-1998-006-01, :on 980617,Thermo-Lag Fire Barrier Was Found Installed Outside Approved Joint Design Arrangement,Was Identified.Caused by Personnel Error.Hourly Fire Watch Initiated (← links)
- 05000289/LER-1998-005-01, Forwards LER 98-005-01,re Inoperable Fire Dampers.Revised LER Includes Supplemental Info Addressing Results of Root Cause Evaluation (← links)
- 05000289/LER-1987-004, :on 870502,while Performing Power Range Calibr Surveillance on Reactor Protection Sys,Reactor Tripped on High RCS Pressure.Caused by Operator Error.Procedures Improved to Provide Addl Verification (← links)
- 05000289/LER-1987-007, :on 870625,during Heatup of Rcs,Inadvertent Actuation of Reactor Protection Sys Occurred on High Pressure.Caused by Operator Error.Sys Restored to Normal High Pressure Trip Setpoint (← links)
- 05000289/LER-1986-013, :on 861107,failure Declared on as-found Reactor Bldg Integrated Leak Rate Test.Caused by Leakage from Bldg Purge Exhaust Valve Interspace.Second Test Performed & Resultant as-left Bldg Leak Rate Acceptable (← links)
- 05000289/LER-1987-009-01, :on 870927,personnel Discovered That Liquid Release Monitor RM-L-6 in Defeat & Did Not Automatically Terminate Release from Tank A.Caused by Personnel Error. Defeat Switch Placed in Enable (← links)
- 05000289/LER-1987-007-01, :on 870625,inadvertent Reactor Protection Sys Actuation on High Pressure During Heatup Occurred.Caused by Operator Error.All Operators Counseled & Addl Steps Added to Heatup Procedure to Emphasize Condition (← links)
- 05000289/LER-1987-008-01, :on 870916,reactor Tripped Following Turbine Trip Due to High Moisture Separator Level.Caused by Level Controller LC77E Failure.Controller Repaired & High Level Trip Time Delay Relay Replaced (← links)
- 05000289/LER-1987-006-01, :on 870612,reactor Tripped on High RCS Pressure Due to Lack of Feedwater.Caused by Operator Error.Senior Reactor Operators & Reactor Operators Directed to Be Aware of Main Feed Pump Speed Control (← links)
- 05000289/LER-1998-002-01, Forwards LER 98-002-01,providing Addl Info Addressing Reason for Event,Extent of Problem Associated W/Missing Operator Aid,Assessment of Safety Consequences of Event & Corrective Actions Taken (← links)
- 05000289/LER-1998-003, :on 980218,discovered Installation of Thermo- Lag Fire Barrier on Incorrect Conduit Duct.Caused by Personnel Error.Revised Operating Procedure 1104-45 & Installed One Hour Fire Rated Barrier on Subject Cable Duct (← links)
- 05000289/LER-1998-004, :on 980218,loss of CS Capability Was Noted. Caused by Improper Assembly of RBS Pump Discharge Valve Control Switch Pushbutton.Pushbutton Switch Was Replaced W/New Properly Assembled Pushbutton Switch (← links)
- 05000289/LER-1999-009, :on 990626,automatic Start of EDG 1A Occurred. Caused by Failure of Fault Pressure Relay on Auxiliary Transformer 1B.Failed Pressure Relay Has Been Replaced (← links)
- 05000289/LER-1987-003-02, :on 870402,App R Fire Barrier Penetration Seal Discovered Missing from Fire Zone Boundary Since 1978.Caused by Engineering Personnel Error.Required Seal Installed on Day of Discovery (← links)
- 05000289/LER-1986-012-01, :on 860904,exhaust Duct Grill in Switchgear Room 1D Found Blanked Off,Blocking Air Flow from Room.Caused by Personnel Error.Fire Watches Established (← links)
- 05000289/LER-1986-013-01, :on 861107,reactor Bldg Integrated Leak Rate Test Declared Failure as-found.Caused by Purge Exhaust & Penetration Pressurization Valve Leakage.Check & Butterfly Valves Repaired & Procedure Revised (← links)
- 05000289/LER-1987-005-01, :on 870506,industrial Waste Filter Sys Sample Not Analyzed Prior to Release.Caused by Personnel Error in Failing to Follow Required Procedure,Per Tech Specs. Personnel Counseled to Assure Compliance (← links)
- 05000289/LER-1987-004-02, :on 870502,reactor Tripped on High Pressure. Caused by Operator Accidentally Transferring Flow Signal Instead of Flux Signal During Test.Procedures Changed & Operator Counseled (← links)
- 05000289/LER-1999-010, :on 990830,discovery of Condition Outside UFSAR Design Basis for Flood Protection Was Noted.Caused Because Original Problem Was Not Corrected by Design Change.Flood Procedure Was Immediately Revised.With (← links)
- 05000289/LER-1997-003-01, Forwards LER 97-003-01 Re Potential Overpressurization of Makeup Pump Suction Piping,Due to Inadequate Test & Operating Procedures (← links)
- 05000289/LER-1999-007-01, Forwards LER 99-007-01 Re Increasing Failure Rate of ESAS Relays.Rept Supplements Preliminary Info Re Determination of Root Cause & Long Term Corrective Actions.Changes Made for Supplement Are Indicated in Bold Typeface (← links)
- 05000289/LER-1987-001-01, :on 870109,emergency Diesel Generator B Auto Started Due to Electrician Opening One Phase of 1E Bus 4,160-volt Current Transformer.Caused by Inadequate Instruction.Bus re-energized (← links)
- 05000289/LER-1997-009-01, :on 970725,engineering Analysis of Loss of a Train DC Power W/Loss of Offsite Power & LOCA Was Determined.Caused by Plant Designers Error.Trained Operators on Methodology to Regain Control of Es Equipment (← links)
- 05000289/LER-1997-005, Has Been Cancelled (← links)
- 05000289/LER-1986-007, :on 860326,design Criteria on 2 H Backup Air Supply Sys Not Met.Caused by Error in Original Sys Design. Manual Isolation Valves on Side of Two Check Valves Will Be Kept Closed (← links)
- 05000289/LER-1999-008, :on 990604,discovered That Air Flow Through Each of RB Fan Cooler Units Was Below Design Basis Requirement.Caused by Accumulation of Boric Acid from Rc Leakage.Normal Cooling Coils Have Been Cleaned (← links)
- 05000289/LER-1999-001-01, :on 990122,short Sections of Piping Caused by Misplacement of Sensing Elements & Insulation.Caused by Failure to Adhere to Vendor instruction.Re-installed Heat Trace Sys (← links)
- 05000289/LER-1986-011, :on 860601,breaker 1C-02 (Feeder Breaker to Turbine Plant Bus 1C) Tripped.Caused by Failure to Reset Plunger on Phase a Overload Device,Discovered on 860602. Westinghouse Breaker DB-25 Replaced (← links)
- 05000289/LER-1999-003-01, :on 990310,discovered Failure of Manual Balancing Damper in Supply Duct of Control Bldg Evs.Caused by Failure to Adequately Review Risk & Consequences of Change.Failed Damper Was Clamped Open (← links)
- 05000289/LER-1987-002-02, :on 870302,emergency Diesel Generator 1B Autostarted.Caused by Inadvertent Operation of Auxiliary Transformer 1A Fault Pressure Relay & Improperly Dressed Wiring on Relay & Transformer.Maint Scheduled (← links)
- 05000289/LER-1998-011-01, Forwards LER 98-011-01,which Updates & Replaces Info Re Thermo-Lag Fire Barriers Found Installed Outside Approved Joint Arrangement.Rept Was Determined Reportable on 980825 & Reported Via LER 98-011-00 on 980923 (← links)
- 05000289/LER-1988-005-02, :on 880925,RCS Heatup Rate Increased to 60 F Per Hour When Third Reactor Coolant Pump Started.Caused by Procedural Error.Operators Trained & Procedures Revised Re Primary Monitoring Method Used (← links)
- 05000289/LER-1999-002, :on 990212,potential Failure of Multiple Containment Monitoring Sys CIV (CM-V-1,2,3 & 4) Was Noted. Caused by Inappropriate Use of Vendor Info.Personnel Will Be Trained on Mgt Expectations.With (← links)
- 05000289/LER-1996-002, :on 961221,potential Loss of ECCS Pump Suction in Accident Analysis Was Noted Due to Failure to Recognize Effect of Lower RB Pressure.Changed Procedures & Trained Operators to Initiate Swapover at Different Setpoint (← links)
- 05000289/LER-1998-001, :on 980122,failure to Operate & Maintain Flow Instruments within Design Basis Occurred.Caused by Improper Application of Stds for Resolution of Degraded or non- Conforming Conditions.Operators Trained (← links)
- 05000289/LER-1986-006, :on 860315,turbine/reactor Tripped.Caused by Low Oil Pressure.Procedure Changes Initiated to Ensure Standby Lube Oil Cooler Filled & Pressurized Prior to Attempting to Swap Coolers (← links)
- 05000289/LER-1998-013-01, Forwards LER 98-013-01 Re Failure to Perform Fire Protection Program Surveillances at Required Frequency.Completed Corrective Actions Described in Section Viii of Attached Rept Constitute Commitments Made to Reduce Occurrenc (← links)
- 05000289/LER-1997-006-02, Re Unqualified Cable Terminations.Ler 97-006-00 Retracted (← links)
- 05000289/LER-1998-014-01, :on 981210,missed TS Surveillance Was Noted. Caused by Human Error.Absolute & Relative Control Rod Positions Were Obtained Immediately & Verified to Agree within Required Range.With (← links)
- 05000289/LER-1997-010-01, :on 971012,PORV Inoperability Was Determined. Caused by mis-wiring & Failure to Perform post-maintenance Test Following Replacement During 11R Refueling Outage.Porv Replaced During 12R Refueling Outage Was Wired Correctly (← links)
- 05000289/LER-1997-007, :on 970621,generator Output Breaker Failed Resulting in Loss of Offsite Power & Rt.Caused by Failure of Generator Breaker GB-102.Both Failed Breakers Were Replaced (← links)
- 05000289/LER-1999-006, :on 990525,inability of Pressurizer Support Bolts to Meet FSAR Requirements,Was Determined.Cause Not Identified.Performed Operability Review & Determined That Pressurizer Would Remain Operable Under Design Conditions (← links)
- 05000289/LER-1999-005, :on 990514,open Flood Path Between Turbine Bldg & Control Bldg Was Noted.Caused by Failure to Recognize That Mods Affected Flood Protection.Revised Flood Procedures.With (← links)
- 05000289/LER-1999-004, :on 990510,EFW Pump Was Inoperable Longer than Allowed by TSs Due to Lack of Lubrication.Caused by Loose Set Screw Resulting in Bearing Failure.Pump Was Repaired & Returned to Service on 990512 (← links)
- 05000289/LER-1986-010, :on 860423,reactor Tripped on High RCS Pressure Resulting from Inadequate Main Feedwater Flow.Caused by Personnel Error.Procedural Changes Initiated (← links)
- 05000289/LER-1986-009, :on 860422,incorrect Cable to Emergency Cooling Fans Identified During Environ Qualification Reverification Walkdown.Caused by Personnel Error.Cable Replaced W/ Environmentally Qualified Cables (← links)
- 05000289/LER-1988-001-02, :on 880316,CRD Breaker Failed Undervoltage Trip Test.Caused by Undervoltage Trip Paddle Lodged Over Armature Disk.Breaker Replaced.Maint Procedures Will Be Revised to Provide Direction for Verifying Dimensions (← links)
- 05000289/LER-1998-010-01, :on 980825,potential Violation of Design Criteria During Single Auxiliary Transformer Operation Occurred.Caused by Failure to Adequately Define Job Performance Stds.Temporary Change Notice Issued (← links)
- 05000289/LER-1988-004-02, :on 880813,reactor Coolant Pump Tripped & Heat Seek Protection Sys Actuated to Start Emergency Feedwater Pumps.Caused by Inadequate Procedural Guidance.Test Procedure Changed & Test Completed (← links)
- 05000289/LER-1998-012, :on 980828,discovered That Control Bldg Ventilation Damper AH-D-270 Had Been Opened Approx 50% for as Long as 54 Days.Caused by Lack of Controls for Subject Damper.Immediately Closed & Tagged Damper AH-D-270 (← links)
- 05000289/LER-1988-003-02, :on 880728,chlorine Detector Sys Inoperable Causing Nuisance Alarm.Caused by Personnel Error by Shift Supervisor.Individual Counselling of All Shift Supervisors Re Verification of Channels Performed (← links)
- 05000289/LER-1998-009-01, :on 980820,discovered Potential Loss of HPI During Postulated Loca.Caused by Misapplication or Interpretation of Design Inputs.Revised OL Was Implemented & Mut Pressure & Level Limits Analysis Revised (← links)
- 05000289/LER-1998-008-01, :on 980818,RM RM-A-8G-High Was Noted Inoperable for More than 7 Days.Caused by Weaknesses in I&C Work Practices.Revised Data Collection Portion of Surveillance Procedures (← links)
- 05000289/LER-1986-001-01, :on 860103,snubber RC-18 Found Inoperable Due to Detached Parts.Caused by Personnel Error.Snubber Restored to Operable Status & Engineering Evaluation Performed Per Tech Spec 4.17.1.g.2 (← links)
- 05000289/LER-1985-004-02, :on 851126,21 & 23,core Borings Identified as Fire Penetrations Performed W/O Installation of Fire Penetration Seals or Establishment of Fire Watch.Caused by Personnel Error (← links)
- 05000289/LER-1988-002-02, :on 880619,pressurizer Level & Cooldown Rate Exceeded Due to Inadequate Test Procedure.Caused by Procedural Inadequacies.Test Procedure Will Be Revised to Prevent Recurrence of Event (← links)
- 05000289/LER-1997-008, :on 970621,power to Control Rod Drive Mechanisms Was Lost & Reactor Tripped.Caused by Long Trip Insertion Times at Tmi.Rods Were Trip Tested Per Surveillance Procedure 1303.11.1 (← links)
- 05000289/LER-1997-006-01, :on 970424,reactor Bldg Fan Motors Unqualified Cable Termination Occurred Due to Incorrect Engineering Guidance.Caused by Personnel Error.Qualifiable Repair of AH-E-1A Fan Motor Termination Was Installed on 970323 (← links)
- 05000289/LER-1997-005-01, :on 970410,declared motor-operated Reactor Bldg Purge Valves Inoperable Due to Inadequate Closing Torque. Caused by Deficient Design Analysis.Will Perform Evaluation of Valve Specific Seating Torque Test Data (← links)
- 05000289/LER-1986-003, :on 860114,undervoltage Relay for CRD Trip Breaker Failed,Causing Inoperability of Shunt Trip Feature. Caused by Incorrect Positioning of Relay Jumper.Jumper Insp Added to Procedures (← links)
- 05000289/LER-1986-004-01, :on 860227,w/condenser Offgas Monitor RM-A-5L Out of Svc & Continuous Watch of RM-A-13 Not Established, Small Leak in once-through Steam Generator Unidentified. Caused by Personnel Error (← links)
- 05000289/LER-1997-002, :on 970129,potential Inability of Startup Feedwater Block Valves to Fully Close Following Main Steam Line Break Occurred Due to MOV Program Weakness.Increased Torque Switch Settings on Valve Operators (← links)
- 05000289/LER-1981-013-01, /01X-1:on 811125,bubble Leakage Test Indicated Leaking Tubes in once-through Steam Generators (OTSG) a & B. Caused by Inadvertent Introduction of Sulfur Into Rcs. Chemical Agent Removed & OTSGs Repaired (← links)
- 05000289/LER-1997-001-01, :on 970117,potential Overpressurization of Piping Between Closed Reactor Building Isolation Valves Occurred Due to Inadequate Design Code Guidance.Results of This Review Will Be Documented (← links)
- 05000289/LER-1997-004, :on 970228,declared Auxiliary & Fuel Handling Bldg Ventilation Sys Inoperable.Cause Related to Wording in TS Bases & Fsar.All Sys Maint,Testing & Design Mods Performed (← links)
- 05000289/LER-1986-002, :on 860104,anticipatory Reactor Trip from Turbine Trip Occurred During Power Escalation.Caused by High Moisture Separator Level.Failed Controller Replaced & Power Escalation Recommenced (← links)
- 05000289/LER-1996-001, :on 961112,investigation of Seismic Qualification of Class 1E 4160 W Breakers Was Conducted Due to Incident Caused by Personnel Error.Racked Out Breakers Were Removed from Associated Modules (← links)
- 05000289/LER-1985-003-02, :on 851201,main Generator Overexcitation Relay Tripped.Caused by Incorrect Operation of 59/81 Small Test Vessel Overvolts/Hertz (Overexcitation) Relay Due to Relay Drift,Misoperation or Improper Relay Setting (← links)
- 05000289/LER-1997-001-02, :on 970117,potential Overpressurization of Piping Between Closed Reactor Building Containment Isolation Valves Occurred Due to Inadequate Design Code Guidance. Results of Review Will Be Documented.Pages 2 & 3 Corrected (← links)
- 05000289/LER-1985-002-02, :on 850907,reactor Manually Tripped Due to Fire in CRD Transfer Switch.Caused by Failure of Relay K171 Which Shorted Groups 5 & 6 Rod Select Contacts.Failed Components Replaced (← links)
- 05000289/LER-1985-001-02, :on 850625,while Performing Tech Spec Surveillance Sp 1303-5.1,actuation of Test Group I Components for Hpis Occurred.Caused by Operator Error. Operator Counseled (← links)
- 05000289/LER-1996-001-02, :on 961112,Westinghouse Class IE 4160 Vac Switchgear W/Breakers Were Not Seismically Qualified.Caused by Personnel Error.Racked Out Breakers Were Removed from Modules & Seismically Restrained (← links)
- 05000289/LER-1996-001-01, :on 961112,determined That Westinghouse Class IE 4160 Vac Breakers Were Not Seismically Qualified.Caused by Personnel Error.Removed Racked Out Breakers from Modules & Seismically Restrained (← links)
- 05000289/LER-1991-008-01, :on 911223,discovered Misfiled Surveillance Notification Form Specifying Core Flood Tank Monthly Boron Sample Days Beyond Latest Date.Caused by Personnel Error. Surveillance Tracking Practice Revised (← links)
- 05000289/LER-1984-007-01, Corrected LER 84-007-01:on 841116,once-through Steam Generator a Tubes Identified as Category C-3 Defective (More than 1% of Insp Tubes Defective).Further Manifestation of Problem Found During 1981 & 1982 Testing (← links)
- 05000289/LER-1995-005, :on 951012,invalid Heat Sink Protection Sys Actuation Occurred.Caused by Failure of Two Logic Modules. Continued Daily Inspections of Hsps Cabinet Lamps & Counseled Personnel Re Communication Technique (← links)
- 05000289/LER-1992-003-01, :on 921019,discovered Reactor Building Atmospheric Radiation Monitor Inoperable Due to Personnel Error Which Caused Improper Valve Lineup.I&C Technician Has Been Counseled (← links)
- 05000289/LER-1992-002-01, :on 920918,reactor Tripped as Result of Inadequate Review for Removal of Circulation Water Pump Trip on High Condenser Inlet Water Box Pressure.Procedures Will Be Revised to Provide Addl Guidance (← links)
- 05000289/LER-1984-007-02, :on 841116,once-through Steam Generator a Tubes Identified as Defective During Eddy Current Testing.Cause Not Finalized.Defective Tubes Removed from Svc (← links)
- 05000289/LER-1984-003, :on 840702,fire Area Identified W/O Fire Barrier Penetration Seals.Caused by Inadequate Supervision of Workers Installing Seals.Procedure Revised (← links)
- 05000289/LER-1984-004-03, :on 830602,discovered Tube A-134-74 Mistakenly Plugged in June 1983 While Tube A-135-72 Left Unplugged. Complete Photographic Reverification of All Plugged Tubes Performed (← links)
- 05000289/LER-1995-002-01, :on 950908,control Rod Trip Insertion Times Exceeded TS 4.7.1.1 Limits.Caused by Accumulation of Corrosion Deposits in CRDM Thermal Barrier Call Check Valves & Lead Screw Guide Bushing (← links)
- 05000289/LER-1995-004-01, :on 950912,short Term Interruption of DHR Flow Occurred Due to Inadvertent Operation of DH-V-1 During ESAS Relay Coil Replacement.Caused by Less than Adequate Procedural Guidance.Procedures Revised (← links)
- 05000289/LER-1992-001, :on 920122,inadvertent Emergency Feedwater Initiation Occurred During Planned Maint.Caused by Installation Error.Wire Errors Affecting Sys Operation Corrected (← links)
- 05000289/LER-1984-006-02, :on 840718 & 19,during Performance of Surveillance Procedure,Setpoints for Three Iie 27H Relays (27) in 4160-volt Bus 1E (EA) Found Out of Calibr.Caused by Drift Out of Tolerance.Faulty Relays Replaced (← links)
- 05000289/LER-1984-005-01, :on 840716,diesel Generator Differential Relays Discovered Potentially Incapable of Withstanding Seismic Event.Caused by Improper Application of Relays in Original Plant Design.Relays Will Be Replaced (← links)
- 05000289/LER-1984-004-02, :on 830602,tube A-135-72 Not Plugged & Tube A-134-74 Found in Tube A-135-72 Location.Correct Tube Plugged & All Other Tubes Verified (← links)
- 05000289/LER-1995-005-01, :on 951012,invalid Heat Sink Protection Sys Actuation Occurred.Caused by Failure of Logic Modules.Logic Module Failure Analysis Will Continue in Order to Substantiate Suspected Failure Mode (← links)
- 05000289/LER-1984-003-01, :on 840702,12 Penetrations in Instrument Shop Floor Identified as Not Having fire-rated Penetration Seals. Caused by Inadequate Supervision of Contractor Personnel During Installation.Insp Procedure Changed (← links)
- 05000289/LER-1995-003-01, :on 950909,reactor Coolant Leak Occurred Due to Crack Weld in Cold Leg Drain Line.Failed Line Replaced.W/ (← links)
- 05000289/LER-1984-002-02, :on 840603,partial Engineered Safeguards Actuation Sys Actuation Occurred.Caused by Engineered Safeguards Actuation Sys Relay Failures in Conjunction W/ Maint Testing.Maint Procedure Will Be Updated (← links)
- 05000289/LER-1984-001, :on 840427,relay Room Floor Fire Barrier Penetration Seal 735 Identified in Deficient Condition.No Seal Material Installed in Condulet.Seal Inspected & Repaired (← links)
- 05000289/LER-1984-001-02, :on 840427,relay Room Floor Fire Barrier Penetration Seal 735 Identified to Be in Deficient Condition.Fire Seals in New Conduits Installed Between Apr 1979 & 831107 Will Be Inspected & Repaired (← links)
- 05000289/LER-1991-001-02, :on 910707,inoperability of Degraded Grid Voltage Relays Resulting from Reinstallation of Volt Breaker.Caused by Physical Configuration of Switchgear Cubicle.Engineering Evaluation Performed (← links)
- 05000289/LER-1977-016, Forwards Supplemental Info to LER 77-016/01T-0 Re Half Trip in Steam Feedwater Rupture Control Sys (← links)
- 05000289/LER-1977-016-01, /01T-0:on 770924,RCS Temp & Pressure Rose.Caused by Half Trip Condition from Steam & Feedwater Rupture Control Sys.Possible Cause of Half Trip Attributed to Loose Connection at Terminal Boards (← links)
- 05000289/LER-1991-004, :on 911008,irradiated Fuel to Test Hoist Interlocks W/O Full Containment Isolation.Caused by Staff Error & Procedural Inadequacy.All Licensed Operators to Receive Addl Training & Procedures Revised (← links)
- 05000289/LER-1991-007-01, :on 911113,main Feedwater Pump Intentionally Tripped During Plant Heatup to Verify Stop Valve Closure. Both motor-driven ESF Pumps Started.Caused by Personnel Error.Event Reviewed W/Personnel (← links)
- 05000289/LER-1991-006-01, :on 911104,discovered Increased Potential for post-LOCA Boron Precipitation.Caused by Error in NSSS Vendor Licensing Basis Analysis.Util Will Confirm Calculations to Support Conclusions within 1 Month (← links)
- 05000289/LER-1991-005-02, :on 911101,in Process of Bypassing Train a, Operator Depressed Incorrect Pushbutton,Causing ESAS Actuation of Channel A.Caused by Personnel Error.Operator Counseled & Plant Incident Rept Written (← links)
- 05000289/LER-1991-004-02, :on 911008,irradiated Fuel Assembly Moved W/O Verification of Containment Integrity During Performance of Main Fuel Bridge Hoist Test.Caused by Procedural Weaknesses/ Personnel Error.Incident Reviewed W/Personnel (← links)
- 05000289/LER-1982-016-03, /03L-0:on 821222,during Cold Shutdown,Fire Barrier Penetration Seal 489 Identified as Having Unacceptable Void Under Cable Tray Support Angle.Temporary Damming Matl Installed on Both Sides of Seal (← links)
- 05000289/LER-1983-044-01, /01T-1:on 831114,during Walkdown,Emergency Feedwater Automatic Initiation Redundant Circuits Discovered Routed in Same Cable Bundle.Caused by Failure to Include Circuits in Upgrade Design (← links)
- 05000289/LER-1983-042-99, /99X-0:on 831004,during Shift Walk Through of Battery Room A,Cell 29 Found Leaking.Root Cause Unknown. Possible Cause May Be Aging of Matl Used to Make Cells.Job Ticket CC203 Written to Replace Cells (← links)
- 05000289/LER-1983-045-03, /03L-0:on 831113,while Flowmeter FT-146 Out of Svc,Min Number of Channels Discovered Less than Required by Tech Spec 3.21-1.Caused by Misaligned Propeller Shaft & Slippage of Friction Wheel.Shaft Replaced (← links)
- 05000289/LER-1983-043-01, /01T-0:on 831106,emergency Feedwater Pump EF-P-2 Failed to Start.Condition Existed Since 831002 Oil Changes. Caused by Broken Fuse Clip & Inadequate Procedure.Clip Replaced (← links)
- 05000289/LER-1991-002-02, :on 910724,reactor Tripped on Low RCS Pressure Due to Control Rod Group 7 Dropping Into Reactor Core.Caused by Personnel Error & Equipment Failure.Components Repaired & Maint Personnel Trained (← links)
- 05000289/LER-1983-038-03, /03L-0:on 831017,valve V-2 on Purge Exhaust RMS RM-A-9 Discovered in Position 2 Rather than Position 1, Causing Reactor Bldg Purge Sample Flow to Shut Off.Caused by Personnel Error.Valve Restored (← links)
- 05000289/LER-1983-037-03, /03L-0:on 831013,during Degassification of RCS, Waste Gas Sys Monitor Became Inoperable.Vent Header Pressure Exceeded Max Analyzer Discharge Pressure.Header Pressure Reduced (← links)
- 05000289/LER-1995-001-01, :on 950307,RC Leak Caused by Failure of Parker Hannifin Compression Fitting Due to Insufficient Tightening During Installation.Shut Root Valves & Stopped Leak (← links)
- 05000289/LER-1983-034-03, /03L-0:on 831004 & 07,during PORV Testing & Primary Sys Degassing,Hydrogen Concentration in Miscellaneous Waste Storage Tank Exceeded 2% Tech Spec Limit.Cause Not Stated (← links)
- 05000289/LER-1983-039-01, /01T-0:on 831018,waste Gas Sys Deuterium Monitor Removed from Svc W/O Sample Taken.Caused by Personnel Error. Sample Taken & Analyzed Immediately (← links)
- 05000289/LER-1983-036-03, /03L-0:on 831006,three Fire Barrier Seals Determined Inoperable.Caused by Inadequate Installation Instructions.Fire Watch Posted During Seal Repair.Procedure Revised (← links)
- 05000289/LER-1983-035-03, /03L-0:on 831004,during Surveillance Test of Halon Bottles of Air Intake Halon Sys,One Bottle Found to Be Underweight.Caused by Leaking Schrader Valve.Bottle Replaced (← links)
- 05000289/LER-1983-040-01, /01T-0:on 831017,19 & 20,releases Made from Industrial Waste Treatment & Filter Sys w/RM-L12 Inoperable. Caused by Issuance of Immediately Effective Amend on 831014 W/O Util Knowledge Until 831021 (← links)
- 05000289/LER-1983-031-03, /03L-0:on 830930,discovered That Alternate Pumps MU-P-1B,NR-P-1B & NS-P-1B Not Tested to Verify Operability on Engineered Safeguards Start Signal.Caused by Inadequate Procedural Review.Procedure Will Be Revised (← links)
- 05000289/LER-1983-033-03, /03L-0:on 830928,reactor Bldg High Pressure Switch Setpoint on Reactor Protective Sys Channel a Found Less Conservative than Tech Spec Limit.Caused by Setpoint Drift. Switch Recalibr (← links)
- 05000289/LER-1983-029-03, /03L-0:on 830917,while in Hot Shutdown for Noncritical Steam Generator Testing,Snubber NSE-18 Found Unpinned W/Load Stud Missing.Caused by Inadequate Procedure Which Should Have Required Loctite (← links)
- 05000289/LER-1983-027-03, /03L-0:on 830916,during Performance of Emergency Sequence & Power Transfer test,make-up Pump MU-P-1C Tripped After 4160-volt IE Bus Loaded on Diesel Generator.Caused by Variable Time Delay.Relay Replaced (← links)
- 05000289/LER-1983-032-01, /01T-0:on 830930,selected Instrument Lines Required Mods to Meet Design Basis.Evaluation Revealed Stresses from Thermal & Seismic Loads Below Operability Criteria.Loops Installed Prior to Criticality (← links)
- 05000289/LER-1983-030-03, /03L-0:on 830911,radiation Monitor (RM)-A5 Experienced Intermittent Electrical Fluctuations Causing Readout Module to Indicate High Count Rate.Caused by Low Energy Pulses of noise.RM-A5 Detector Replaced (← links)
- 05000289/LER-1983-025-01, /01T-0:on 830915,during once-through Steam Generator testing,3/4-inch Vent Valve Which Serves as Containment Isolation Valve Found Open.Caused by Personnel Error.Operators Counseled (← links)
- 05000289/LER-1983-047-03, /03L-0:on 831219,two Cable Fire Seals Identified W/No Fire Barrier Seal Matl Inside Conduits.Caused by Procedure Error.Seals Repaired (← links)
- 05000289/LER-1983-041-99, /99X-0:on 831025,while in Cold Shutdown,Cracking Observed on Molded Rubber Seat Ring of Containment Purge Isolation Valve AH-V1B.Caused by Insufficient Adhesion Between Plies of Seat Matl (← links)
- 05000289/LER-1983-015-01, /01T-0:on 830611,oxygen Concentration in Waste Gas Sys Remained in Excess of 2% for Greater than 1 H.Caused by Failure to Recognize Maint Activities Affected When Oxygen Introduced in Waste Gas Sys (← links)
- 05000289/LER-1983-007-03, /03L-0:on 830325,automatic Termination & Alarm Failed to Occur When Dilution Flow Fell Below Min Setpoint During Liquid Effluent Release.Caused by Sticking of Trip Interlock Pneumatic Relay.Procedures Modified (← links)
- 05000289/LER-1983-011-01, /01T-0:on 830415,while in long-term Shutdown DH-P1A Shaft Bearings Failed,Making Pump Inoperable.Caused by Improperly Authorized Mod to Component & Inadequate Mod Set Up.Pump Repaired.Maint Job Tickets Reviewed (← links)
- 05000289/LER-1991-003-02, :on 910927,turbine Control Valves Started Opening rapidly,once-through Steam Generator Pressure Began to Drop & Reactor Trip Occurred During Testing.Caused by Inadequate Procedure.Procedure Revised (← links)
- 05000289/LER-1983-046-01, /01T-0:on 831214,nuclear safety-related Circuit for Makeup Pump Lube Oil Pressure Trip Switches MU-P1C Found Incorrectly Routed.Caused by Trip Circuits Not Upgraded When Modified (← links)
- 05000289/LER-1982-006-03, /03L-0:on 820427,monitor RM-A9,which Monitors Reactor Bldg Purge Particulate,Iodine & Gaseous Effluents, Valved Out of Svc Due to Improper Valve Line Up.Valve Misalignment Caused by Illegible Valve Position Markings (← links)
- 05000289/LER-1982-008-01, /01T-0:on 820511,oxygen Concentration Exceeded Tech Spec Limit in C Reactor Coolant Bleed Tank After Maint. Caused by Failure to Provide for Maint Activities in Tech Spec.Tech Spec Change Will Clarify App I (← links)
- 05000289/LER-1983-028-01, /01T-0:on 830920,manual Inside Containment Isolation Valve IA-V20 in Instrument Air Sys Found Open. Caused by Threaded Stem Bushing Backed Partially Out of Yoke & Paint Buildup on Stem.Parts Replaced (← links)
- 05000289/LER-1983-026-01, /01T-0:on 830919,while Testing Main Steam Safety Valves,All Valves Except One Lifted Above Allowed Lift Setpoint Tolerance of +1%.Caused by Personnel Error Which Resulted in Defective Procedure (← links)
- 05000289/LER-1983-024-99, /99X-0:on 830827,while in Cold Shutdown Condition, Engineered Safeguards Actuation Sys Actuation Relay 63Z1B/ RB2A Coil Found Smoking.Probably Caused by End of Coil Life or Incomplete pull-in of Armature (← links)
- 05000289/LER-1983-021-03, /03L-0:on 830825,outbuildings Auxiliary Operator Observed No Flow Rate on Outlet Valve RM-L-7.Caused by Corrosion Clogging Valve.Piping Will Be Replaced W/Stainless Steel to Prevent Recurrence (← links)
- 05000289/LER-1983-019-03, /03L-0:on 830823,flow to Condenser Exhaust Monitor RM-A5 Shut Off When Valve Inadvertently Closed.Caused by Personnel Error.Flow Restored.Responsible Individuals Instructed (← links)
- 05000289/LER-1983-020-03, /03L-0:on 830826,while Taking Once Per Shift Readings,Operator Found No Sample Flow to Condenser Exhaust Monitor.Caused by Moisture Condensing in Monitor Sample Line.Flow Increased to Blow Out Moisture (← links)
- 05000289/LER-1983-023-99, /99X-0:on 830827,while Locally Checking Control Rod Drive Breakers Prior to Closing Disconnect Switches,One Breaker Indicated Closed by Mechanical Indicator.Caused by Worn Breaker Operating Mechanism (← links)
- 05000289/LER-1983-022-01, /01T-0:on 830827,gas Analyzer Alarm Received Indicating High Hydrogen During Pump Heatup to Hot Shutdown Conditions.Caused by Personnel Error.Plant Incident Rept Reviewed by All Personnel (← links)
- 05000289/LER-1983-017-03, /03L-0:on 830728,outbuilding Auxiliary Operator Discovered Lack of Sample Flow Through Station Liquid Effluent Monitor RM-L7.Caused by Valve Closed or Clogged W/ Foreign Matl.Valve Adjusted (← links)
- 05000289/LER-1983-016-03, /03L-0:on 830703,liquid Effluent Radiation Monitor RM-L7 Had No Sample Flow Through Monitor.Caused by Mechanical Seizure.Pump & Motor Replaced (← links)
- 05000289/LER-1989-002, :on 891114,radiator Fan Right Angle Gear Drive Bearing Lubrication Discovered Inadequate Due to Formation of Sludge in Lubrication Lines.Caused by Inadequate Procedure.Plant Procedures Revised (← links)
- 05000289/LER-1994-006-01, :on 941002,inadvertent Actuation of EG-Y-1B Occurred Due to Personnel Error.Lead replaced,86B/E Relay Reset & EG-Y-1B Breaker Automatically Closed (← links)
- 05000289/LER-1983-018-01, /01T-0:on 830803,two Small Bore Snubbers on RCS Hot Leg Vent Piping Not Surveilled Per Tech Specs.Caused by Omission of Snubbers from safety-related Snubber List. Snubbers Overhauled & Added to Tech Spec List (← links)
- 05000289/LER-1983-013-03, /03L-0:on 830419,while in Cold Shutdown,Relay Room Carbon Dioxide Fire Protection Sys Pressure Fell Below Tech Specs.Caused by Seat Leakage Through Bleeder Valve.Fire Watch Posted.New Valve Installed (← links)
- 05000289/LER-1983-009-03, /03L-0:on 830330,during Surveillance/Calibr of Waste Gas Sys,Hays Gas Analyzer,Oxygen Meter Failed to Respond to Calibr Gas.Cause Unknown.Maint Checks Performed & Circuit Components Cleaned (← links)
- 05000289/LER-1983-008-01, /01T-0:on 830329,high Oxygen Concentration in Miscellaneous Waste Storage Tank WDL-T-12 Observed.Caused by 830328 Clearance of Tank Outlet Pipe to Blow Air Free. Personnel Cautioned on Effects of Using Air to Unclog Lines (← links)
- 05000289/LER-1983-004-03, /03L-0:on 830313,condensation Found in Waste Gas Sys Gas Analyzer While Investigating High Oxygen Alarm. Caused by Failure of Drain Pot Valve to Open Due to Corrosion.Valve Replaced (← links)
- 05000289/LER-1983-005-01, /01T-0:on 830321,manual Sampling of Waste Gas Sys Revealed Concentration of 9%,exceeding 2% Tech Spec Limit. Caused by Maint Activities.Nitrogen Purge Initiated & Concentration Reduced in 9.5 H.Tech Spec Change Submitted (← links)
- 05000289/LER-1978-008-01, /01T-0:on 780202,once-through Steam Generator Feedwater Nozzles Flooded During Operation Below 5% Full Power.Caused by Incorrect Procedure Due to Operating Inexperience.Shutdown & Cooldown Procedures Revised (← links)
- 05000289/LER-1983-014-03, /03L-0:on 830518,while in long-term Cold Shutdown, Liquid Radioactive Effluent Monitor RM-L6 Found Inoperable. RM-L6 Functioned Properly After Monitor Switch Turned Off & On.Rms Recorder Charts Will Be Monitored (← links)
- 05000289/LER-1983-015, :on 830611,oxygen Concentration in Miscellaneous Waste Storage Tank Gas Space Exceeded Tech Spec Limits. Nitrogen Used to Purge Oxygen from Sys & Reduce Concentration (← links)
- 05000289/LER-1983-002-03, /03L-0:on 830201,1A Es 480-volt Motor Control Ctr tripped,de-energizing Associated Circuits & Rendering Radiation Monitors RM-A4,A6 & A9 Inoperable.Caused by Failure of Conductor Insulation in Cable CG-2 (← links)
- 05000289/LER-1994-005-01, :on 940609,noted Irregularity in Overlap Between Average Positions of Control Rod Groups 6 & 7 Due to Intermitent Failure of CRD Sys Programmer Motor.Group 7 Programmer Assembly Will Be Replaced (← links)
- 05000289/LER-1982-015-03, /03L-0:on 821103,1.5-inch Irregular Diameter Hole Found in Floor Fire Barrier Penetration Seal.Caused by Unsealed Opening.Fire Watch Posted.Seal Repaired on 821109 (← links)
- 05000289/LER-1994-004-01, :on 940601,discovered That Three Control Rods Exceeded Trip Insertion Time Limit of 1.666 Seconds Due to Postulated Deposits.Four Thermal Barriers Were Replaced W/New Thermal Barrier (← links)
- 05000289/LER-1994-003-01, :on 940523,level of Sodium Hydroxide Tank Incorrectly Reduced Due to Personnel Error.Applicable Administrative Requirements & Computer Alarms Will Be Reviewed to Determine Need for Changes (← links)
- 05000289/LER-1983-006-03, /03L-0:on 830320,no Flow Existed Through Hydrogen & Oxygen Rotameters of Waste Gas Sys Analyzer.Caused by Dirt Blockage in Regulator & Flow Setting.Pump Discharge Pressure Regulator Setting Raised (← links)
- 05000289/LER-1983-010-03, /03L-0:on 830321,waste Gas Sys Hays Gas Analyzer Alarm Indicated Incorrect Concentration of Oxygen.Caused by Dirty Amplifier Low Channel Gain Potentiometer & Switch Contacts.Components Cleaned (← links)
- 05000289/LER-1982-014-03, /03L-0:on 821005,plant Personnel Identified Defective Fire Barrier Penetration Seal.Silicone Foam Seal Matl Separated from Edges of Barrier After Curing.Fire Watch Posted & Fire Barrier Penetration Seal Repaired (← links)
- 05000289/LER-1983-003-01, /01T-0:on 830211,pilot Valve Disc Found Stuck Open & Main Valve Stuck Closed.Porv Removed for Special Insp to Ensure That Corrosion Found in Previously Installed PORV Had Not Occurred (← links)
- 05000289/LER-1994-002-01, :on 940317,twelve Control Rods Exceeded Trip Insertion Time Limit.Caused by Blockage of Thermal Barrier Check Valves.Corrective Action:Control Rods Were Restored to Drop Time (← links)
- 05000289/LER-1982-001-01, /01T-1:on 820225,during Shutdown & Evaluation of Control Room Habitability Review Per NUREG-0737,Item III.D.3.4,found That Computer Room Air Conditioning Duct Work Penetrated Wall to Fuel Handling Bldg (← links)
- 05000289/LER-1982-013-03, /03L-0:on 820830,plant Effluent Radiation Monitor (RM-L-7) Had No Sample Flow.Caused by Open Breaker on Sample Pump SR-P-4.Breaker Closed.Operator Surveillance Program Continued to Ensure Proper Flow (← links)
- 05000289/LER-1978-031-04, /04T-0:on 781204,station River Water Discharge Delta Temp Limit of 12 F Was Exceeded by 2 F.Caused by Heating of Station River Discharge by Mechanical Draft Cooling Towers (← links)
- 05000289/LER-1978-030-03, /03L-0:on 780923,borated Water Found in Heater Terminal Box.Caused by Cladding Rupture & Hot Spot from Evaporator Tank Crud Buildup (← links)
- 05000289/LER-1978-029-01, /01T-0:on 780914,temp Sensor for a Emergency Diesel Generating Room Found to Be Inoperable & Fire Watch Not Established within 1-h.Caused by Personnel Error. Procedural Guidance Will Prevent Recurrence (← links)
- 05000289/LER-1978-027-01, /01T-0:on 780901,during Transmitter Calibr,Actual Level of Borated Water in Core Flood Tank B Found Below Min Allowable Level.Caused by Level Transmitter Out of Calibr. Borated Water Added to Tank (← links)
- 05000289/LER-1978-026-03, /03L-0:on 780820,during Normal Operation,Inner Door of Reactor Bldg Personnel Hatch Jammed Open.Leak Rate Test on Outer Door Was Satisfactory.Caused by Worn Cam & Misadjusted Drive Train Components (← links)
- 05000289/LER-1978-024-01, /01T-0:on 780807,B&W Informed Met Ed That Atypical Weld Filler Wire May Have Been Used in Const of Reactor Vessel.Caused by Supplier Error.Integrity of Vessel Not Compromised.Tech Specs Will Be Revised (← links)
- 05000289/LER-1993-007, :on 931008,pressure Isolation Valve Failed to Seat Tightly During Plant Operation Due to Loose Hinge Mechanism.Replaced Internals of Pressure Isolation Valve (← links)
- 05000289/LER-1993-009, :on 931112,motor Operator Failure Occurred Due to Improper Declutch Lever Installation.Eight Nuclear Safety Related Limitorque Size Smb 000 MOVs Modified W/New Balanced Declutch Levers (← links)
- 05000289/LER-1990-006-01, :on 900702,control Room Operator Depressed Manual RB High Pressure Actuation Pushbutton During Testing Causing Emergency Safeguards Actuation.Caused by Personnel Error.Personnel Reinstructed (← links)
- 05000289/LER-1982-010-99, /99X-0:on 820526,engineered Safeguards Actuation Sys Failed to Come Out of Bypass During post-maint Testing Following Triac Replacement.Caused by Hampering of New Triac Drop Out Due to Induced Voltage on Input Circuit (← links)
- 05000289/LER-1982-009-03, /03L-0:on 820526,during Shutdown,Improper Valve Lineup Discovered.Caused by Technician Failure to Follow Sampling Procedure & to Realign Valves (← links)
- 05000289/LER-1982-007-03, /03L-0:on 820505,during long-term Shutdown & Reactor Bldg Purge,Iodine Channel of Radiation Monitor RM-A9 Failed Intermittantly.No Cause Discernable.Quarterly Calibr Performed & Recorder Charts Will Be Monitored Each Shift (← links)
- 05000289/LER-1982-004, :on 820413,EPRI Tests on Pressurizer Code Safety Valves Revealed Failure to Determine Ability of Valve to Perform Under Feed & Bleed Cooling If Pressurizer Power Operated Relief Valve Isolated.Investigation Underway (← links)
- 05000289/LER-1982-005-03, /03L-0:on 820411,while in Ordered Shutdown,Liquid Effluent Radiation Monitor Discovered Inoperable.Caused by Failure of Pump SR-P4,due to Piping Clogged W/Mud.Piping Cleared & Motor Replaced (← links)
- 05000289/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000289/LER-1982-004-01, /01T-0:on 820413,during Shutdown & Tests Conducted Per NUREG-0737,Item II.D.1,EPRI Valve Test Results Indicated Potential Problem W/Pressurizer Code Safety Valves (Dresser Model 31739A).Evaluation Continuing (← links)
- 05000289/LER-1982-003-01, /01T-0:on 820318,while Regenerating B String Cation & Anion Deep Bed Demineralizers,Rinse Cycles Filled Secondary Neutralizing Tank (Snt) Causing Snt to Overflow Caused by Operator Error.Procedures Revised (← links)
- 05000289/LER-1982-003, Forwards LER 82-003/01T-0 (← links)
- 05000289/LER-1993-006, :on 930701,lube Oil Accumulation Discovered on EDG EG-Y-1B Due to Inadequate Maint.Edg Removed from Svc & Leak Repaired by Retorquing Filter Housing Bolts (← links)
- 05000289/LER-1993-005, :on 930510,discovered That Surveillance Procedure Sp 1301-8.1, Reactor Bldg Annual Insp Not Performed by Required Completion Date of 930402.Caused by Lack of Mgt Oversight.Tracking Mechanism Developed (← links)
- 05000289/LER-1993-004, :on 930503,plant Process Computer Malfunction Event Occurred Due to Suspected Hardware Problem.Cause of Malfunction Not Revealed.Computer Sys Software Change Has Been Implemented (← links)
- 05000289/LER-1993-002, Responds to NRC Ltr Re Violations Noted in Insp Rept 50-289/93-09.Corrective Actions:Administrative Procedures on Operations Surveillance Program Revised & Actions Committed to in LER 93-002 Will Be Completed by May 1993 (← links)
- 05000289/LER-1990-003, :on 900227,turbine Bypass Valves Isolated During Plant Heatup Due to Main Steam Valve Closure.Caused by Personnel Error.Personnel Reviewed Event to Emphasize Need to Follow Administrative Requirements (← links)
- 05000289/LER-1981-011, Updated LER 81-011/01T-1:on 811019,determined That Catwalk Structure,Used to Support Cable Trays,Conduit & Terminal Blocks for Control Consoles Did Not Meet Seismic Criteria. Caused by Ae Failure to Perform Calculations (← links)
- 05000289/LER-1981-010-03, QC Audit Showed One of 21 Reactor Bldg Prestressing Tendons Inspected During 1980 Surveillance Had Low Liftoff Force.Caused by Use of Incorrect Calibr Data.Procedure Being Rewritten (← links)
- 05000289/LER-1981-014-01, /01T-0:on 811223,during IE Bulletin 79-02/14 Insps of Pipe Supports,Nine Structural Interfacing Areas Were Identified as-built in Nonconformance to Original Design Areas in Final Stages of Mod.Reanalysis Initiated (← links)
- 05000289/LER-1981-014, Forwards LER 81-014/01T-0 (← links)
- 05000289/LER-1981-006-03, /03L-0:on 810507,corrosion on Diesel Fire Pump Battery Terminals Noted.Caused by Failure to Include Surveillance in Computer Tracking Sys.Surveillance Entry Into Computer Data Base Verified (← links)
- 05000289/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000289/LER-1981-012-04, /04L-0:on 811116,ETS 2.2.1.a,limiting Condition for Riverwater Chlorination,Was Exceeded.Caused by Malfunctioning Timing Device.Faulty Timer Repaired.Tech Spec Change Request 100A Allows Condition to Equal NPDES Permit (← links)
- 05000289/LER-1981-012, Forwards LER 81-012/04L-0 (← links)
- 05000289/LER-1981-005-99, /99X-0:on 810122,cumulative Reactor Utilization Factor Was Determined Not to Meet Newly Amended Tech Spec. Caused by Amending Tech Specs W/O Verifying Record.Tech Spec Will Be Changed (← links)
- 05000289/LER-1993-003-01, :on 930312,reactor Tripped as Result of Reactor Coolant Pump Power Monitor Malfunction.Caused by Electrical Equipment Failure.Failed Equipment Repaired & Tested Satisfactorily (← links)
- 05000289/LER-1993-002-01, :on 930129,bypass Occurred of Both Decay Heat Svc Coolers.Caused by Personnel Error.Mgt Reviewed Event W/ Affected Crew & Procedures Will Be Upgraded (← links)
- 05000289/LER-1993-001-02, :on 930126,Pressure Switch BS-PS-286 Declared Inoperable Because of Failure to Meet Reduncy Requirement of TS Table 3.5-1.Five Remaining Similar Switches Inspected & Deadband Reset as Required (← links)
- 05000289/LER-1990-005, :on 900306,radioactivity Increases Occurred Due to Primary to Secondary Tube Leak in Steam Generator.Caused by Crack in Bottom of Tube Sheet.Tube Stabilized & Plugged (← links)
- 05000289/LER-1990-004-01, :on 900304,reactor Tripped Following Zero Power Physics Testing.Caused by Personnel Error.All Control Room Operators & Licensed Supervisors Will Review Event & Lessons Learned During Formal Training (← links)
- 05000289/LER-1990-002, :on 900131,discovered Gaps in Reactor Bldg Sump Screen.Caused by 1983 Mod Which Created Access Hatches in Top of Reactor Bldg Sump Screen Cage.All Unacceptable Gaps & Standing Wire Mesh Will Be Repaired (← links)
- 05000289/LER-1981-010, Forwards LER 81-010/03L-0.Detailed Event Analysis Encl (← links)
- 05000289/LER-1981-011-01, /01L-O:on 811019,catwall Structure Used to Support Cable Trays,Conduit & Terminal Blocks for Control Consoles Determined Inadequately Designed for Seismic Loads. Caused by Lack of Seismic Design Calculations by Ae (← links)
- 05000289/LER-1981-009-01, /01T-0:on 810117,emergency Diesel Generator Feeder Breaker Logic Anomaly Discovered Which Could Result in Damaged Motor or Generator End Turns & Excessive Voltage Dip on Diesel Generator.Caused by Design Error (← links)
- 05000289/LER-1981-009, Forwards LER 81-009/01T-0 (← links)
- 05000289/LER-1981-008-03, /03L-0:on 810907,reactor Bldg Access Doors Resilient Seals Discovered Not Being Tested at Frequency Required by Tech Spec.Caused by Personnel Error Possibly Due to Nonprecise Procedural Guidance.Access Doors Tested (← links)
- 05000289/LER-1981-008, Forwards LER 81-008/03L-0 (← links)
- 05000289/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000289/LER-1982-012-01, /01T-0:on 820902,after Surveillance for Station Liquid Effluent Monitor (RML-7),discovered That Alarm Setpoint Improperly Calculated Since Implementation of Nov 1981 License Amend 72.Caused by Personnel Error (← links)
- 05000289/LER-1982-012, Forwards LER 82-012/01T-0 (← links)
- 05000289/LER-1978-065-99, /99X-0:on 781107,reduction in Feedwater Flow Led to Reactor Trip & Subsequent Safety Injection Actuation. Caused by Reduction in Feedwater Flow During Physics Testing Testing,Which Required Operating at Elevated Tave (← links)
- 05000289/LER-1978-065, Forwards LER 78-065/99X-0 (← links)
- 05000289/LER-1978-069-99, /99X-0:on 781202,while Switching from Startup to Main Feedwater Regulating Valves,Reactor Trip Occurred Following Safety Injection Actuation Due to Overfeeding Steam Generator.Caused by Main Feedwater Valve Pinned Open (← links)
- 05000289/LER-1978-069, Forwards LER 78-069/99X-0 (← links)
- 05000289/LER-1978-021-03, /03L-0:on 780414,vital Bus 2-IC Became Deenergized.Caused by Alternate Source Tripping During Sfas Testing.Faulty Inverter Control Module & Ruse Replaced (← links)
- 05000289/LER-1983-012-03, /03L-0:on 830406,while Performing Functional Testing of Hydraulic Snubbers,Snubber MS-209 Failed to Lock in Tension Direction.Caused by Damaged Piston Seal Ring. Snubber Overhauled & Tested Satisfactorily (← links)
- 05000289/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000289/LER-1990-003-01, :on 900227,isolation of Turbine Bypass Valves Due to Main Steam Valve Closure.Caused by Personnel Error. Personnel Will Review Event in Order to Emphasize Need to Follow Proper Administration (← links)
- 05000289/LER-1990-001, :on 900107,inadvertent Trip of Reactor Protection Sys Occurred,Followed by Inadvertent Engineered Safeguards Actuation Sys Actuation.Caused by Inadequate Procedural Detail.Procedure Improvements Made (← links)
- 05000289/LER-1989-003-02, :on 891129,rapid Reduction in Turbine Load Occurred Resulting in High Temp & Pressure in RCS & Reactor Trip.Caused by Loose Shield Wire on Input to Speed Error Circuit.Connections in EHC Cabinet Checked (← links)
- 05000289/LER-1981-007-99, /99X-0:on 810702,pipe Supports Found Located or Oriented Improperly When Installed Per IE Bulletin 79-02 & 79-14 Insp Results.Caused by Inadequate Insp Prior to Operation.Supports Are Being Modified (← links)
- 05000289/LER-1981-007, Forwards LER 81-007/99X-0 (← links)
- 05000289/LER-1981-005, Forwards LER 81-005/99X-0 (← links)
- 05000289/LER-1981-002-03, /03L-0:on 810130,three Snubbers Failed to Lock Up as Required by Tech Spec.Caused by Worn Piston Ring Seals & Springs W/Excessive Spring Constants.Snubber Seals,Pistons, Valve Blocks & Weight Springs Replaced (← links)
- 05000289/LER-1981-002, Forwards LER 81-002/03L-0 (← links)
- 05000289/LER-1981-004-03, /03L-0:on 810324,during Refueling Interval Functional Testing of Hydraulic Snubbers,Snubber RC-21/MUE-43 Discovered W/Shipping Plug Installed in Fluid Reservoir Vent Port.Caused by Procedure Violation (← links)
- 05000289/LER-1981-004, Forwards LER 81-004/03L-0 (← links)
- 05000289/LER-1981-001-03, /03L-1:on 810117,two Leaks Found in 1-inch Bypass Around MU-V17 During Limited Plant Heatup.Caused by Flange Socket Fillet Weld Failure Due to fabrication-induced Crack in Root of Weld (← links)
- 05000289/LER-1981-001, Forwards LER 81-001/03L-1.Detailed Event Analysis Encl (← links)
- 05000289/LER-1981-003-03, /03L-0:on 810210,new Penetration in Fire Wall Between Engineered Safeguards Actuation Sys,Fire Area CB-3C & Relay Room,Fire Area CB-3D,found Necessary for New Cable Routing for Mods on Containment Isolation RM-5C (← links)
- 05000289/LER-1981-003, Forwards LER 81-003/03L-0 (← links)
- 05000289/LER-1980-013-03, /03L-1:on 800715,pressurizer Code Safety Valve, RC-RV1B,lifted Below Tech Spec Limits.Cause Not Determined. Addl Testing Planned to Verify Site Heated Nitrogen Test Procedure Yields Results Comparable to Steam Pop Test (← links)
- 05000289/LER-1980-013, Forwards LER 80-013/03L-1 (← links)
- 05000289/LER-1980-017-01, /01T-0:on 800923,during Review,Per IE Bulletin 79-01b,documentation to Demonstrate That Breaks on Motor Operators on Purge Valves AH-V1B/C & safety-related Valves DH-V5A/B Re Environ Qualified Found Insufficient (← links)
- 05000289/LER-1980-002-03, /03L-0:on 800131,w/plant in Cold Shutdown,Annual Insp of Diesel Generator 1A(1301-8.2) Was Not Performed. Caused by Repairs in Progress on Decay Heat Loop B & Spare Parts on Order to Support Insp.Insp Will Be Performed (← links)
- 05000289/LER-1980-002, Forwards LER 80-002/03L-0 (← links)
- 05000289/LER-1980-016, Has Been Cancelled (← links)
- 05000289/LER-1980-019-03, /03L-0:on 801126,A & B Battery Room Smoke Detector Monthly Surveillance Test Not Performed.Caused by Inadequate Implementation of Administrative Controls.Surveillance Modified (← links)
- 05000289/LER-1980-019, Forwards LER 80-019/03L-0 (← links)
- 05000289/LER-1980-018-01, /01T-0:on 801017,while Replacing Coils for Asco Solenoid Valves Per IE Bulletin 79-01A,coils Were Discovered to Conflict W/Station Voltage Range.Caused by Incorrect Purchase Order for Coils (← links)
- 05000289/LER-1980-018, Forwards LER 80-018/01T-0 (← links)
- 05000289/LER-1989-002-02, :on 891114,discovered That Radiator Fan Right Angle Gear Drive Bearing Lubrication Inadequate Due to Formation of Sludge in Lubrication Lines.Procedure Revised to Increase Maint on Lubrication Sys (← links)
- 05000289/LER-1989-001-02, :on 891030,operator Error Resulted in Inadvertent Actuation of Es Components B.No Equipment Was Damaged & Vol of Water Injected Into RCS Minimal.Operators Counseled (← links)
- 05000289/LER-1980-015-04, /04T-0:on 800721,while Units Were in Cold Shutdown Condition,Actual River Water Temp Exceeded Tech Spec Limits for 6-h.Caused by Inaccurate Compensation for Resistance Temp Detector Lead Resistance During Calibr (← links)
- 05000289/LER-1980-015, Forwards LER 80-015/04T-0 (← links)
- 05000289/LER-1980-014-03, /03L-0:on 800715,during Insp,Snubber NSE-151 Had Low Fluid Level & Failed Functional Test.Possibly Caused by Leakage Past Seal Damaged During Installation.Seals Replaced & Snubber Passed Functional Test (← links)
- 05000289/LER-1980-014, Forwards LER 80-014/03L-0 (← links)
- 05000289/LER-1980-007-01, /01T-0:on 800423,results of Radiographic Exam of Piping Welds for Leak Rate Test Sys Disclosed That 8 Out of 17 Welds Did Not Meet Acceptance Stds of Power Piping Code. Caused by Lack of Preservice Exam (← links)
- 05000289/LER-1980-007, Forwards LER 80-007/01T-0 (← links)
- 05000289/LER-1979-006-03, /03L-0 on 790228:during Refueling Frequency Local Leak Rate Testing,Valve CA-V5B Did Not Fully Close.Caused by Bent Valve Stem Resulting in Binding in Packing Gland.Stem Was Straightened & Valve Satisfactorily Leak Tested (← links)
- 05000289/LER-1979-006, Forwards LER 79-006/03L-0 (← links)
- 05000289/LER-1979-005-03, /03L-0 on 790225:during Leakage Surveillance on Decay Heat Removal Sys,Total Measured Leakage Exceeded Tech Specs.Caused by Leakage from Valve Packing Glands in Valves DH-V-15 A/B,DH-V-6A,DH-V-5A & BS-V-3B.Glands Adjusted (← links)
- 05000289/LER-1979-005, Forwards LER 79-005/03L-0 (← links)
- 05000289/LER-1979-004-03, /03L-0 on 790217:emergency Diesel Tripped on Overspeed During Emergency Loading & Power Transfer Test. Caused by Governor Not Shutting Off Fuel When Set Speed Reached.Maint Procedures Revised (← links)
- 05000289/LER-1979-004, Forwards LER 79-004/03L-0 (← links)
- 05000289/LER-1979-003-03, /03L-0 on 790217:during post-shutdown Operations, While Performing Emergency Sequence & Power Transfer Test, High Pressure Injection Pump MU-P-1C Tripped on Overload. Caused by Failed Lead Between Winding & Motor.Lead Repair (← links)
- 05000289/LER-1979-003, Forwards LER 79-003/03L-0 (← links)
- 05000289/LER-1979-002-03, /03L-0 on 790112:when Actuation Signal Was Applied to Open Valve from Its mid-position DH-V-58,motor Breaker Tripped. Caused by Motor Brake Not Releasing. Brake Will Be Inspected by 790331 (← links)
- 05000289/LER-1979-002, Forwards LER 79-002/03L-0 (← links)
- 05000289/LER-1979-001-03, /03L-0 on 790107:during Inservice Insp Test on Decay Heat River Water Pump 1A(DR-P1a),vibration Level Was within Required Action Range. Caused by Imbalance Due to Rag in Pump Section & Perturbed by Shaft Sleeve Wear (← links)
- 05000289/LER-1979-001, Forwards LER 79-001/03L-0 (← links)
- 05000289/LER-1979-001-01, /01T-1 on 780106:informed by B&W That Difference Between Reactor Power as Indicated by out-of-core Instrumentation & as Calculated by Heat Balance May Exceed 4% of Full Power.Tech Spec Change Initiated (← links)
- 05000289/LER-1980-011-03, /03L-0:on 800610,reactor Bldg Spray Sys Compressed Air Test Exceeded Late Date.Caused by Incorrect Date Being Entered Into Surveillance Data Tracking Sys.Info Corrected. Review of Infrequent Surveillances Will Be Performed (← links)
- 05000289/LER-1980-011, Forwards LER 80-011/03L-0 (← links)
- 05000289/LER-1980-012-01, /01T-0:on 800627,during Review of Environ Qualification of Equipment Required to Operate During Main Steam Line Break Per IE Bulletin 79-01B,found That post- Accident Analysis Exceeded Previous Figures (← links)
- 05000289/LER-1980-012, Forwards LER 80-012/01T-0 (← links)
- 05000289/LER-1980-008-99, /99X-0:on 800430,during Annual Insp of a Emergency Diesel Generator,Bearing Insulation Determined Deteriorated. Caused by Normal Aging or Heating Bearing Lube Oil. Insulation Replaced & Lower Viscosity Oil Used (← links)
- 05000289/LER-1980-008, Forwards LER 80-008/99X-0 (← links)
- 05000289/LER-1980-010-01, /01T-0:on 800606,licensee Received Ltr Stating FSAR Does Not Assume That Radioactive Release Paths Exist Via Main Safety Valves or Emergency Feed Pump Turbine Exhaust.Caused by Implementation of Small Break Guidelines (← links)
- 05000289/LER-1980-010, Forwards LER 80-010/01T-0 (← links)
- 05000289/LER-1980-009-03, /03L-0:on 800607,reactor Bldg Tendon Surveillance Late Date Was Exceeded.Caused by Problems W/Availability of Contractor Equipment.Surveillance Continuing (← links)
- 05000289/LER-1980-009, Forwards LER 80-009/03L-0 (← links)
- 05000289/LER-1980-011-99, /99X-0:on 800321,Rosemount 1152 Pressure Transmitter in Limited Cases Exhibited Output Between 4 & 20 Ma W/Input Pressure Over or Under Calibr Range.Caused by long-term Degradation from Submergence in Water (← links)
- 05000289/LER-1980-005-99, /99X-0:on 800321,Rosemount 1152 Pressure Transmitter in Limited Cases Exhibited Output Between 4 & 20 Ma W/Input Pressure Over or Under Calibr Range.Caused by long-term Degradation from Submergence in Water (← links)
- 05000289/LER-1980-006-01, /01T-0:on 800325,during Periodic Reactor Bldg Local Leak Rate Testing,Containment Isolation Valve RB-V7 Had Excessive Leakage.Cause Suspected to Be Seat Damage. Improved Valve Placed on Order (← links)
- 05000289/LER-1980-006, Forwards LER 80-006/01T-0 (← links)
- 05000289/LER-1980-004-01, /01T-0:on 800306,during Piping Reanalysis,Errors Were Discovered in Seismic Analysis of Common Decay Heat Suction Piping.Caused by Analysis Error.Affected Piping Seismic Analysis Will Be Corrected & Hardware Changes Made (← links)
- 05000289/LER-1980-004, Forwards LER 80-004/01T-0 (← links)
- 05000289/LER-1978-011, Forwards LER 78-011/03L-0 (← links)
- 05000289/LER-1979-011-03, /03L-0 on 790405:leaks Noted in Spent Fuel Pool Cooling Sys Piping.Caused by Intergranular Stress Corrosion Cracking.Areas of Leakage Isolated;Stress Analyses Will Be Performed (← links)
- 05000289/LER-1979-010-03, /03L-0 on 790411:while in Hot Shutdown, Reassignment of Personnel to Unit 2 Prevented Surveillances Re Chemistry & Radiological Analysis at Proper Frequency. Missed Surveillances Subsequently Performed (← links)
- 05000289/LER-1979-010, Forwards LER 79-010/03L-0 (← links)
- 05000289/LER-1979-009-03, /03L-0 on 790410:during Surveillance Testing on turbine-driven Emergency Feedpump,Steam Regulating Valve Found Closed.Caused by Maint Procedure Not Specifying Opening of Valve (← links)
- 05000289/LER-1979-009, Forwards LER 79-009/03L-0 (← links)
- 05000289/LER-1979-008-03, /03L-0 on 790310:during Refueling Frequency Local Leak Rate Test,Excessive Leakage Noted Across Valve AH-V1B. Caused by Loose Valve Seat Retaining Screws in Valve.Screws Tightened & Valve Tested Satisfactorily (← links)
- 05000289/LER-1979-008, Forwards LER 79-008/03L-0 (← links)
- 05000289/LER-1980-003-01, /01T-0:on 800206,during Valve Mods,Valve Seat hold-down Devices for HPI Pump Discharge Check Valves (MU-V73A/73C) Found Loose.Caused by Possible Corrosion.Insp Program Continuing & Design Study Is Being Developed (← links)
- 05000289/LER-1980-003, Forwards LER 80-003/01T-0 (← links)
- 05000289/LER-1976-012, Requests Exemption to 10CFR50 App H Rule Allowing Operation W/Reactor Vessel Surveillance Capsules Removed.Event Described in LER 76-012/01T Dtd 760318.Tech Spec Change Request 32 Encl (← links)
- 05000289/LER-1980-001-01, /01T-0:on 800123,during Load Study,Determined That Potential Overload Condition Could Exist on 1P 480-volt Bus W/Failure of Is 480-volt Bus.Caused by Inadequate Design (← links)
- 05000289/LER-1980-001, Forwards LER 80-001/01T-0 (← links)
- 05000289/LER-1978-009-03, /03L-0 on 780315:dc Breaker CB3 Failed to Trip on One of Several Tests.Caused by Apparent Binding of Breaker Operating Linkage.Binding May Have Been Due to Insufficient Exercise of Breaker &/Or Lack of Maint (← links)
- 05000289/LER-1978-009, Forwards LER 78-009/03L-0 (← links)
- 05000289/LER-1978-014, :Number Not in Use (← links)
- 05000289/LER-1978-021, :Number Not in Use (← links)
- 05000289/LER-1977-013-04, /04T:on 770523,during Normal Operation,Waste Concentration in River Water Discharge Found in Excess of Designated Max.Caused by Slug of Suspended Solids Breaking Loose During Sampling.Discharge Terminated (← links)
- 05000289/LER-1977-012-03, /03L:on 770519,engineered Safeguard Pump MU-P-1A Was Removed from Svc Prior to Testing Redundant Pump. Caused by Personnel Error.Redundant Pump Tested Satisfactorily.Personnel Instructed in Procedures (← links)
- 05000289/LER-1977-012, RO 77-12/3L:on 770519,engineered Safeguard Pump MU-P-1A Was Removed from Svc Prior to Testing Operability of Redundant Pump.Caused by Personnel Error.Redundant Pump Tested Satisfactorily on 770519.Forwards LER 77-12/03L (← links)
- 05000289/LER-1977-014-03, /03L:on 770524,during Reactor Bldg Cooling & Isolation Sys Logic Channel & Component Test,Reactor Bldg Cooling Return Isolation Valve RB-V7 Failed to Close Upon Receipt of Signal.Caused by Dirt on Valve Diaphragm (← links)
- 05000289/LER-1977-015-03, /03L:on 770529,during Normal operation,230 Kv Substation Bus 4 Was de-energized by Differential Relay 87BB-1.Caused by Wiring Error on Auxiliary Transformer Due to Drawing Error.Bus & Transformer Returned to Svc (← links)
- 05000289/LER-1977-015, Notes Error in LER 77-15/3L Submitted 770628.Both Drawings in Section 9 Should Be Numbered 207-011 (← links)
- 05000289/LER-1977-017-03, /03L:on 770624,during Normal Operating & semi- Annual Leak Test,Leakage Observed Around Inner Door Seal of Personnel Accces Hatch of Reactor Bldg.Caused by Procedural Inadequacies Causing Improper Installation of Door (← links)
- 05000289/LER-1977-018-03, /03L:on 770629,during Normal Operation,Nuclear Svcs River Water Pump NR-P1C Shaft Failed During Pump Operation.Caused by Mechanical & Procedural Problems.Pump Lined Up & Repaired within 4-h (← links)
- 05000289/LER-1977-021-01, /01T:on 770726,during Normal Operation,Radiation Monitor RM-A2 Failed & Atmosphere Sampling of Reactor Bldg Not Performed.Caused by Improper Reassembly Following 770725 Surveillance Test.Monitor Repaired.Procedure to Be Revi (← links)
- 05000289/LER-1977-019-03, /03L:on 770713,during Normal Operation,Leak in Miscellaneous Waste Evaporator Feed Tank Immersion Heater Shorted Out Heater & Feed Pump.Caused by Leak in Temp Probe on Heater.Heater Replaced & Operating Procedure Modified (← links)
- 05000289/LER-1977-022-01, /01T:on 770825,during Normal Operation Restrictions Placed on Decay Heat Removal Pumps Found Contrary to Pump Operating Capability Per Fsar.Restrictions Placed on Pump by B&W Due to Pump Failure at Other Util (← links)
- 05000289/LER-1977-023-01, /01T:on 770926,during Heatup Operation Both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Failure of Interlock,Poor Hatch Design & Operator Error.Addl Interlock to Be Added (← links)
- 05000289/LER-1977-023, RO 77-23/1T:on 770920,both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Personnel Error.Doors Closed.Forwards LER 77-23/1T (← links)
- 05000289/LER-1978-001-01, /01T-0:on 780106,B&W Informed Util That During Certain Plant Transients,Difference Between Reactor Power as Indicated by out-of-core Instrumentation & as Calculated by Heat Balance May Exceed 4% of Full Power (← links)
- 05000289/LER-1978-001, Forwards LER 78-001/01T-0 (← links)
- 05000289/LER-1978-002-01, /01T-0:on 780112,valve FS-V156 Closed to Modify Sprinkler Sys Piping to B Emergency Diesel Radiator Room & Continuous Fire Watch Not Established for 24-h.Caused by Personnel Error.Fire Protection Tech Specs to Be Reviewed (← links)
- 05000289/LER-1978-002, Forwards LER 78-002/01T-0 (← links)
- 05000289/LER-1978-005-01, /01T-0:on 780119,Plant Operation Review Committee Found Containment Integrity Violated by Opening Valves BS-V47A & B During Pump Operability Test.Caused by Error in Operating Procedure OP 1104-5.Procedure to Be Revised (← links)
- 05000289/LER-1978-005, Forwards LER 78-005/01T-0 (← links)
- 05000289/LER-1978-004-03, /03L-0:on 780117,while Closing Valve MU-V74A,22 Gallon Per Minute Packing Gland Leak Developed.Caused by Worn Packing in Valve.Valve Placed on Backseat.Packing Replaced 780118 (← links)
- 05000289/LER-1978-004, Forwards LER 78-004/03L-0 (← links)
- 05000289/LER-1978-003-03, /03L-0:on 780112,emergency Diesel Generator 1B Failed to Start on Simulated Test Signal During Procedure SP1305-5.2.Caused by Drifting Oil Pressure Limit Switch. Setting Adjusted,New Limit Switch Ordered (← links)
- 05000289/LER-1978-003, Forwards LER 78-003/03L-0 (← links)
- 05000289/LER-1978-006-03, /03L-0:on 780124,during Normal Operation,Reactor Coolant Sample Isolation Valve CA-V13 Failed to Close When Actuated by Remote Signal.Caused by Valve Stem Thread Wear. Containment Isolation Valve CA-V2 Closed (← links)
- 05000289/LER-1978-006, Forwards LER 78-006/03L-0 (← links)
- 05000289/LER-1978-007-03, /03L-0:on 780128,while at 50% of Full Power,Incore Quadrant Power Tilt Limit Exceeded.Transient Caused by Transient Power Operations & Maneuvering to all-rods-out Configuration.Xenon Burned Out & Tilt Returned to Limits (← links)
- 05000289/LER-1978-007, Forwards LER 78-007/03L-0 (← links)
- 05000289/LER-1978-010-01, /01T-0:on 780318,during Emergency Sequence & Power Transfer test,1A & 1C Makeup Pumps Tripped When Transferring to Onsite Source Due to Malfunctioning Time Delay Relay & Diesel Generators Failed to Start Due to Pressure Swit (← links)
- 05000289/LER-1978-010, Forwards LER 78-010/01T-0 (← links)
- 05000289/LER-1978-011-03, /03L-0:on 780318,snubber MS-201 Found W/No Fluid in Reservoir.Caused by Pinched Rod Wiper Seal (← links)
- 05000289/LER-1978-012-03, /03L-0:on 780406,during Functional Tests,One Snubber DHH-187 Would Not Lock Up Upon Compression.Cause Undetermined.Valve Block Replaced & Satisfactory Test Made (← links)
- 05000289/LER-1978-012, Forwards LER 78-012/03L-0 (← links)
- 05000289/LER-1978-013-01, /01T-0:on 780413,B&W Informed Util That Small Break on Reactor Coolant Pump Discharge Had Not Been Analyzed in Fsar.Procedures to Be Revised & Operators to Be Trained in Response to Small Break LOCA (← links)
- 05000289/LER-1978-015-01, /01T-0:on 780502,during Initial Cycle 4 Startup, Control Rods Found Positioned in Restricted Region Per Tech Specs 3.5 for 9-h.Caused by Use of Incorrect Rod Index Limit Curve in Procedure.Documentation Procedures Revised (← links)
- 05000289/LER-1978-015, Forwards LER 78-015/01T-0 (← links)
- 05000289/LER-1978-016-01, T-0:on 780503,B&W Identified That for Cycle 4, Peak RCS Pressure Following Accident Exceeds Max Allowable Pressure by 4.4 Psig.Caused by Assuming Larger Instrument Error Associated W/Pressure Sensor.Tech Spec to Be Changed (← links)
- 05000289/LER-1978-016, Forwards LER 78-016/01T-0 (← links)
- 05000289/LER-1976-046-01, /01T:on 761213,concentration of Boric Acid in Borated Water Storage Tank Fell Below Specified Minimum. Caused by Water Leakage from Decay Heat Removal Sys,Which Diluted Borated Water in Storage Tank (← links)
- 05000289/LER-1978-018-01, /01T-0:on 780519,two Restraints Found Not Installed on Emergency Feedpump Turbine Main Steam Supply Line Relief Valves MC-V22A/B Per Drawing.Caused by Improper Const.Nonessential Access Restricted to Relief Valve Area (← links)
- 05000289/LER-1976-046, Forwards LER 76-046/01T.Provides Supplemental Info (← links)
- 05000289/LER-1978-018, Forwards LER 78-018/01T-0 (← links)
- 05000289/LER-1978-019-03, /03L-0:on 780605,while Performing Procedure Sp 1303-5,control Fuse Opened & Valve RB-V-7 Did Not Operate.Caused by Failure of Voltage Spike Suppressor Across Coil of Auxiliary Relay,Causing Short Circuit (← links)
- 05000289/LER-1978-019, Forwards LER 78-019/03L-0 (← links)
- 05000289/LER-1978-020-01, /01T-0:on 780614,seven of Nine Control Rods in Group 3 Inadvertently Dropped Into Core,Causing Operation W/More than One Inoperable Rod.Caused by Shorted Diode in DC Hold Secondary Power Supply.Fuses & Diode Replaced (← links)
- 05000289/LER-1978-020, Forwards LER 78-020/01T-0 (← links)
- 05000289/LER-1977-001-01, /01T:on 770203,w/diesel Generator B Out of Svc,A Generator Was Lost,Causing Operation at Limiting Condition Less Conservative than Tech Specs.Generator a Out of Svc Due to Binding of Oil Pressure Low Speed Switch (← links)
- 05000289/LER-1976-045-03, /03L:on 761028,monitor RM-A2 Removed from Svc for Repair,Forcing Operation in Degraded Mode Per Tech Specs.Monitor Design Flow Allows Condensation Due to Heat Differential Between Reactor Bldg & Intermediate Bldg (← links)
- 05000289/LER-1976-045, Forwards LER 76-045/03L.Provides Supplemental Info (← links)
- 05000289/LER-1977-001, Forwards LER 77-001/01T.Provides Supplemental Info (← links)
- 05000289/LER-1976-042, Supplements LER 76-42/1P Describing Concrete Pipe Installations Not Included in Fsar.Met Ed Considers All Lines Repaired on North Side of Screen House Seismically Qualified & safety-related Lines Fully Operational (← links)
- 05000289/LER-1976-040, Provides Supplemental Info to LER 76-40/3L.Leakage from DH-V-1 Valve Immediately Stopped & Repaired within 48-h. Airborne Activity Below Levels Necessitating Respiratory Protection.Personnel Wore Breathing Masks at First Entry (← links)
- 05000289/LER-1977-020-04, /4T:on 770719,during Passage of Storm Front,Station River Water Discharge Temp Fell to in Excess of 3 F Below Inlet Temp.Caused by Storm Front.A & B Mechanical Draft Cooling Fans Stopped (← links)
- 05000289/LER-1977-020, Forwards LER 77-20/04T-0 (← links)
- 05000289/LER-1979-017-01, /01T-1:on 791108,size of Support Bolting for Rigid Anchor DHH-127 Was Found to Be Inadequate in Design & Installation.Caused by Bolts Being 5/8-inch in Diameter, Contrary to 3/4-inch Design Requirement (← links)
- 05000289/LER-1979-017, Forwards LER 79-017/01T-1 (← links)
- 05000289/LER-1977-002-04, /04T-0:on 770304,river Water Discharge Exceeded Inlet River Water Temp by 14 F,Violating 12 F Limit During Normal Operation.Caused by Atmospheric Conditions & Personnel Error.Standby Decay Heat Water Pump Reduced Temp (← links)
- 05000289/LER-1978-028-01, /01T-0:on 780908,during Calibr of Sodium Hydroxide Tank Level Transmitter as Part of Refueling Interval Surveillance,Tank Was Found in Contain Excess 215 Lb of Sodium Hydroxide.Caused by Transmitter Calibr Drift (← links)
- 05000289/LER-1978-028, Forwards LER 78-028/01T-0 (← links)
- 05000289/LER-1978-022-03, /03L-0:on 780723,A Emergency Diesel Generator Air Valve Found Tagged Shut,Rendering a Diesel Inoperable.Caused by Personnel Error.All Operations Dept Personnel Briefed on Testing Redundant Engineered Safeguards Sys (← links)
- 05000289/LER-1978-022, Forwards LER 78-022/03L-0 (← links)
- 05000289/LER-1978-023-03, /03L-0:on 780805,during Power Reduction to 65% Full Power,Incore Detector Quadrant Power Tilt Limit Was Exceeded for 50 Minutes.Max Tilt 3.79%.Caused by Xenon Buildup & Control Rod Insertion.Tilt Returned within Limits (← links)
- 05000289/LER-1978-023, Forwards LER 78-023/03L-0.Event Did Not Require Reporting Per 780815 Discussion W/Nrc.Future Similar Events Will Not Be Reported (← links)
- 05000289/LER-1978-025-01, /01T-0:on 780818-19,neither of Two Inservice Nuclear River Water Pumps Were Selected to Start on Engineered Safeguards Signal.Caused by Personnel Error. Pumps Selected & Personnel to Be Briefed (← links)
- 05000289/LER-1978-025, Forwards LER 78-025/01T-0 (← links)
- 05000289/LER-1979-016-01, /01T-0:on 791001,error in Seismic Analysis for ladder-type Support for Water Piping May Have Resulted in Exceeding of code-allowable Stresses.Caused by Error in Design Drawings.Engineering Evaluation in Progress (← links)
- 05000289/LER-1979-016, Forwards LER 79-016/01T-0 (← links)
- 05000289/LER-1977-006-01, /01T:on 770324,during Reactor Refueling,Tech Specs for Leakage of Valves & Penetrations Were Exceeded. Caused by Inability of Carbon Steel Gate Valves in Cooling Water Sys to Keep Tight Seals Between Tests (← links)
- 05000289/LER-1977-006, Forwards LER 77-006/01T-0 (← links)
- 05000289/LER-1979-015-01, /01T-0 on 790723:possible Unconservative Assumption Discovered in Accident Analysis for Small Break Loca.Exposure of Core May Result If Reactor Coolant Pumps Are Tripped After 2 Minutes Following Small Break LOCA (← links)
- 05000289/LER-1979-015, Forwards LER 79-015/01T-0 (← links)
- 05000289/LER-1979-014-04, /04T-0 on 790626:informed by Consultant That Sediment Showed Co-58 Levels Exceeding Control Station Value.Caused by Increased Vol of Liquid Radioactive Waste.No Corrective Action Planned (← links)
- 05000289/LER-1979-014, Forwards LER 79-014/04T-0 (← links)
- 05000289/LER-1979-012-01, /01T-0 on 790618:relay 62x2B/RC1A Failed to Drop Out When Coil Was de-energized.Caused by Notch in Operating Rod.Of 48 Relays inspected,25 Notches Were Found & Removed (← links)
- 05000289/LER-1979-012, Forwards LER 79-012/01T-0 (← links)
- 05000289/LER-1979-013-01, /01T-0 on 790620:leakage Discovered on 10-inch Suction Piping from Borated Water Storage Tank Between Valves DH-V5A/B & MU-V14A/B.Caused by Residual Weld Stresses (← links)
- 05000289/LER-1979-013, Forwards LER 79-013/01T-0 (← links)
- 05000289/LER-1979-011, Updates LER 79-011/03X-0,dtd 790516,re Abnormal Degradation of Spent Fuel Cooling Sys.Cracks in Valve SF-V17 Were Caused by Intergranular Stress Corrosion.Crack Sections Will Be Replaced w/304L,stainless Steel (← links)
- 05000289/LER-1976-044-03, /03L:on 761207,reactor Bldg Containment Isolation Valve Failed to Fully Close,Leading to Operation in Degraded Mode.Caused by Not Lubricating Roller Bearings on Butterfly Valve Shaft (← links)
- 05000289/LER-1977-003-03, /03L:on 770309,reactor Bldg Spray Pump Suction Isolation Valve Motor Failed.Caused by Excessive Grease in Operators Spring Pack Which Stopped Normal Compression of Spring,Preventing Torque Switch Sensing Force to Be Applied (← links)
- 05000289/LER-1976-044, Forwards LER 76-044/03L.Provides Supplemental Info (← links)
- 05000289/LER-1977-003, Forwards LER 77-003/03L.Provides Supplemental Info (← links)
- 05000289/LER-1977-005-04, /04t on 770319,change in River Water Discharge Temp More than 2 Degrees in Hour Period Violated Ets.Caused by Failure of Mechanical Cooling Tower C Fan.Fan to Be Repaired During Current Refueling Outage (← links)
- 05000289/LER-1976-049-03, /03L:on 761212,failure to Test Decay Heat Removal Pump a Before Recirculation of Borated Water Storage Tank W/Decay Heat Removal Pump B.Caused by Lack of Communication Between Personnel Involved in Procedure (← links)
- 05000289/LER-1977-005, Forwards LER 77-005/04T.Provides Supplemental Info (← links)
- 05000289/LER-1976-049, Forwards LER 76-049/03L.Provides Supplemental Info (← links)
- 05000289/LER-1977-004-01, /01T:on 770415,error in Safety Analysis Discovered.Caused by Personnel Using Erroneous Combined Relief Valve Capacity Figures from Vendor Valve Drawing in Safety Analysis (← links)
- 05000289/LER-1977-004, Forwards LER 77-004/01T.Provides Supplemental Info (← links)
- 05000289/LER-1977-007-01, /01T:on 770509,both Doors of Reactor Bldg Emergency Personnel Access Hatch Open at Same Time,Violating Tech Specs.Caused by Door Design Flaw Allowing Free Travel If Closed Against Obstruction,Causing Interlock Stress (← links)
- 05000289/LER-1977-007, Forwards LER 77-007/01T.Provides Supplemental Info (← links)
- 05000289/LER-1977-009-01, /01T:on 770512,loose Steam Generator LOCA Restraint Bolt Found.Caused Either by Improper Tightening During Installation or Loosening Due to Thermal Cycling & Bolt Relaxation in Svc (← links)
- 05000289/LER-1977-009, Forwards LER 77-009/01T.Provides Supplemental Info (← links)
- 05000289/LER-1977-010, Forwards LER 77-010/01T.Provides Supplemental Info (← links)
- 05000289/LER-1977-011-01, T:On 770519,engineered Safeguards Motor Control Center Tripped During Power Operation.Caused by Binding of a Phase Overload Device Tripping Stem.Preventive Maint Will Be Modified to Check for Tripping Stem Resetting (← links)
- 05000289/LER-1977-011, Forwards LER 77-011/01T.Provides Supplemental Info (← links)
- 05000289/LER-1977-008-03, /03L:on 770504 Snubbers Failed to Perform within Acceptable Criteria,Resulting in Operation in Degraded Mode. Caused by Improperly Adjusted Locking Devices & O-ring Seal Leaks.Cause of Failure of Eight Snubbers Unknown (← links)
- 05000289/LER-1977-008, Forwards LER 77-008/03L.Provides Supplemental Info (← links)
- 05000289/LER-1917-004, Regarding Items Nonconforming to Design for Tornado Missile Protection (← links)
- 05000289/LER-1917-003, Regarding Primary Containment Declared Inoperable Due to Both Airlock Doors Open Simultaneously (← links)
- 05000289/LER-2017-002, Regarding Leak at High Pressure Connection on Reactor Coolant Pump a Thermal Barrier (← links)
- 05000289/LER-2017-001, Regarding Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met (← links)
- 05000289/LER-2015-001, Regarding Seismically Qualified Bwst Aligned to Non-Seismic Piping (← links)
- 05000289/LER-2014-002, Regarding Through-Wall Leak on High Pressure Injection (HPI) a Rain Root Valve MU-V-1034 Socket Weld (← links)
- 05000289/LER-2014-001, Regarding Unfused DC Motor Control Circuits (← links)
- 05000289/LER-2013-001, Status Regarding LER 13-001-00 Supplement (← links)
- 05000289/LER-2012-002, Status Regarding LER 2012-002-00 Supplement on Missing Seals in Air Intake Tunnel Conduits (← links)
- 05000289/LER-2012-005, Regarding Reactor Trip Due to RC-P-1C Trip (← links)
- 05000289/LER-2012-004, Regarding Reactor Trip During Downpower Due to Condensate Booster Pump Trip (← links)
- 05000289/LER-2012-003, Regarding Pressurizer Heater Bundle Leak (← links)
- 05000289/LER-2012-001, Regarding Single Condition Making Independent Trains Inoperable (← links)
- 05000289/LER-2011-002, Regarding Remote Shutdown Relay 69X1RR Contact Failure (← links)
- 05000289/LER-2011-001, Regarding Unanalyzed Condition Affecting Probable Maximum Flood (PMF) Level (← links)
- 05000289/LER-2009-001, Regarding Multiple Main Steam Safety Valve Test Failures (← links)
- 05000289/LER-2008-001, Regarding Decay Heat River Water System Pump (DR-P-1B) Failed to Start (← links)
- 05000289/LER-2006-003, Re Automatic Reactor Trip Due to a Design Application Deficiency within the Reactor Coolant Pump Power Monitors Initiated by an Off-Site Grid Disturbance (← links)
- 05000289/LER-2006-002, Re Automatic Reactor Trip Due to an Invalid Turbine Protective System Actuation (← links)
- 05000289/LER-2005-002, Regarding Safe Shutdown Analysis for Control Building Fire Area 1 Was Discovered to Have Flaws in the Fire Mitigation Strategy Due to Insufficient Technical Rigor (← links)
- 05000289/LER-2005-001, Re Building Ventilation Fan Inoperable Due to Cracked Fan Hub (← links)
- 05000289/LER-2004-001, High Pressure Injection Pump Seismic Qualification Impacted Due to an Oversight in the Design Process When Power Supplies for the Auxiliary Oil Pumps Were Relocated (← links)
- 05000289/LER-2003-003, Regarding Reactor Coolant System Pressure Boundary Leakage Due to Degradation of an Alloy 600 Pressurizer Heater Bundle Diaphragm Plate (← links)
- 05000289/LER-2003-002, Regarding Reactor Building Polar Crane Hoist Operation Over the Fuel Transfer Canal During Movement of Fuel Due to Inadequate Understanding of Requirements (← links)
- 05000289/LER-2003-001, From Three Mile Island, Unit 1 Regarding Control Room Habitability Boundary Ventilation Access Panel Found Open Due to Latching Mechanisms Not Properly Closed (← links)
- 05000289/LER-2002-002, TMI-1 Pressurizer Code Safety Valve Setpoint Outside Tolerance During Plant Operation Due to Mechanical Setpoint Drift (← links)
- 05000289/LER-2002-001, Re Vital Power Supply Failure Due to Blown Fuse (← links)
- 05000289/LER-2001-001-02, Re Emergency Feedwater Pump 2A Inoperable Greater than the Technical Specification Allowable Outage Time Due to an Incorrect Operability Determination (← links)
- ML14176A963 (redirect page) (← links)
- 05000289/LER-2014-002, Regarding Through-Wall Leak on High Pressure Injection (HPI) a Rain Root Valve MU-V-1034 Socket Weld (← links)