Pages that link to "05000348/LER-2006-001, Regarding Security Computer Access Control Software Deficiency"
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The following pages link to 05000348/LER-2006-001, Regarding Security Computer Access Control Software Deficiency:
Displayed 3 items.
- ML061110035 (redirect page) (← links)
- 05000348/LER-2006-002, Regarding Main Steam Isolation Valve Failure to Close (← links)
- 05000348/LER-2006-001 (redirect page) (← links)
- 05000348/LER-2002-001 (← links)
- 05000348/LER-2001-003 (← links)
- 05000348/LER-2001-002 (← links)
- 05000348/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000348/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000348/LER-1982-021, Forwards LER 82-021/01T-0 (← links)
- 05000348/LER-1983-005, Forwards LER 83-005/01T-0 (← links)
- 05000348/LER-1981-010, Updated LER 81-010/03X-1:on 810429 & 30,containment Atmosphere Radioactivity Monitoring Sys R-11 Declared Inoperable When Filter Paper Did Not Advance.Caused by Paper Spool Slipping on Shaft.Drive Shaft Adjusted (← links)
- 05000348/LER-1978-063, Forwards LER 78-063/03L-0 (← links)
- 05000348/LER-1978-065, Forwards LER 78-065/03L-0 (← links)
- 05000348/LER-1978-064, Forwards LER 78-064/03L-0 (← links)
- 05000348/LER-1982-046, Forwards LER 82-046/01T-0 (← links)
- 05000348/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000348/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000348/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000348/LER-1983-008, Forwards LER 83-008/03L-0,83-006/03L-0,83-007/03L-0, 83-008/03L-0 & 83-011/03L-0.W/o LERs 83-006/03L-0, 83-007/03L-0,83-008/03L-0 & 83-011/03L-0 (← links)
- 05000348/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000348/LER-1993-001, Forwards Rev 12A to Updated FSAR for Jm Farley Nuclear Plant,Units 1 & 2.Rev 12A Submitted to Resolve Issue Reported in Voluntary LER 93-001-00,dtd 930723 (← links)
- 05000348/LER-1982-061, Forwards LER 82-061/03L-0 (← links)
- 05000348/LER-1978-092, Forwards LER 78-092/03L-0 (← links)
- 05000348/LER-1983-038, Forwards LERs 83-060/03L-0,83-061/03L-0,83-037/03L-0 & 83-038/03L-0.W/o LER 83-038/03L-0 (← links)
- 05000348/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000348/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000348/LER-1983-039, Forwards LER 83-039/03L-0 & Updated LERs 83-024/03X-1 & 83-025/03X-1 (← links)
- 05000348/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000348/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000348/LER-1983-006, Forwards LER 83-006/01T-0 (← links)
- 05000348/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000348/LER-1980-058, Submits Description of Actions Taken Subsequent to Initial 3-yr Containment post-tensioning Sys Testing & Insp,Per LER 80-058/03L-1.Sys Is Performing Design Function W/Margin of Safety,Therefore No Addl Action Necessary (← links)
- 05000348/LER-1981-019, Forwards LER 81-019/03L-0 (← links)
- 05000348/LER-1979-030, Forwards LER 79-030/03L-0 (← links)
- 05000348/LER-1998-002, Forwards LER 98-002-00 Re SG Tube Leakage Investigation Repair & Evaluation.Commitments Contained in Corrective Action Section of Event Rept,Listed (← links)
- 05000348/LER-1998-006, Forwards LER 98-006-00,re PRF Sys Suction Damper Outside Design & Licensing Basis.First Paragraph in Corrective Action Section Contains NRC Commitments Associated with LER (← links)
- 05000348/LER-2024-002-01, Manual Reactor Trip Due to Loss of Power to the 2A 125 Volt DC Distribution Panel (← links)
- 05000348/LER-2024-001, Pressurizer Safety Valve Lift Pressure Outside of Technical Specifications Limits Due to Setpoint Drift (← links)
- 05000348/LER-2023-003, Emergency Diesel Generator (Eog) Lube Oil Pwnp Outlet Coupling Leak (← links)
- 05000348/LER-2023-002, Residual Heat Removal Pump Inoperable for Longer than Allowed by Technical Specifications (← links)
- 05000348/LER-2023-001, Automatic Reactor Trip Due to DC Ground on Turbine Trip Solenoid (← links)
- 05000348/LER-2022-001, Outdated Relay Settings Resulted in an Automatic Reactor Trip After a Floor Tile Was Dropped in High Voltage Switch House (← links)
- 05000348/LER-2021-001, Automatic Reactor Trip Due to Turbine Generator Trip (← links)
- 05000348/LER-1998-003, :on 970315,failure to Comply W/Ts 4.5.3.2 & 3.5.2,was Determined.Caused by Personnel Error.Personnel Involved Have Been Coached Re Procedure Adherence (← links)
- 05000348/LER-1989-002-01, :on 890428,fire Door 2480 Declared Inoperable Due to Securing Door in Open Position.On 890501,fire Doors in Auxiliary Bldg Declared Inoperable Due to Minor Cracks Through Door Skin.Fire Watches Established (← links)
- 05000348/LER-1989-001-01, :on 890328,fire Door 401 Declared Inoperable Because of Cracks Through Metal Around Striker Plate.On 890414,addl Fire Doors Declared Inoperable Due to Cracks. Fire Watches Established (← links)
- 05000348/LER-1989-003-01, :on 890531-0609,five Fire Dampers Tested Below Acceptance Criterion of Closing W/Air Flow in Sys.Caused by Different Conditions in Summer Mode.Design Change Initiated to Determine How Dampers Should Be Modified (← links)
- 05000348/LER-1987-014, :on 870717,fire Damper 1-116-15 in Nonradiation Ventilation Sys Tested & Would Not Close W/Air Flow.Caused by Design Deficiency.Design Change Initiated to Evaluate Options Available & Provide Appropriate Design (← links)
- 05000348/LER-1987-023, :on 871127,control Room Fire Dampers Inoperable Due to Failure to Close W/Air Flow.Caused by Design Deficiency.Implementation of Design Changes Expected within Next 6 Months (← links)
- 05000348/LER-1987-018, :on 871013,discovered That Drawing Error Existed Showing Locations of 1A & 1B Containment Hydrogen Recombiners 1A & 1B to Be Reversed.Caused by Use of Incorrect Drawing.Drawing Corrected (← links)
- 05000348/LER-1987-013, :on 870710,five Sectors of Land Identified W/Increased Calculated Dose.Caused by Presence of Indicator Milk Animal & Movement of Residents Into or Outside Area (← links)
- 05000348/LER-1987-020, :on 871015,contractor Employee Gained Unauthorized Access to Main Control Room Causing Alarm to Be Generated in Security Central Alarm Station.Caused by Personnel Error.Personnel Counseled (← links)
- 05000348/LER-1987-019, :on 871013,visitor Found Unescorted in Vital Area.Caused by Visitor & Escort Becoming Separated.Escort Retrained in Security Requirements & Moves Taken to Min Number of Visitors Requiring Access (← links)
- 05000348/LER-1987-017, :on 871001,Fire Door 496 Declared Inoperable & Could Not Be Repaired within 7 Days Violating Tech Spec 3.7.12.Caused by Door Being Bent & Latch Mechanism Stuck.New Door Ordered.Fire Watch Will Be Maintained (← links)
- 05000348/LER-1987-012, :on 870721,problems W/Configuration of Environ Qualification Solenoid Valve Splices & Terminations Noted. Caused by Unapproved Methods for Installation.Solenoid Valves Modified (← links)
- 05000348/LER-1987-016, :on 870917,fire Dampers Inoperable Due to Failure to Close W/Air Flow.Caused by Improper Installation. Damper Removed from Sys & re-installed Correctly (← links)
- 05000348/LER-1987-011, :on 870611,results of Testing of Fire Dampers Declared Inoperable on 870605,determined That Dampers Would Not Fully Close & Latch W/Air Flow.Caused by Design Deficiency.Design Change Being Developed (← links)
- 05000348/LER-1987-015, :on 870831,0914 & 22,control Room Fire Dampers Did Not Close W/Air Flow During Testing.Caused by Design Deficiency in That Dampers Will Not Close Fully & Latch W/ Air Flow.Design Changes Will Be Initiated (← links)
- 05000348/LER-1997-013, :on 970818,plant Operated Outside of Design Basis Due to Control Room Exhaust Isolation Damper Being Open.Caused by Personnel Error.Revised Procedures to Ensure Dampers Are Operated within Design Basis (← links)
- 05000348/LER-1998-001-02, :on 980217,inadequately Performed Surveillance Occurred Due to Improper Calculation of E-Bar.E-Bar & 100/E-Bar Values Were Recalculated Using Corrected Average Beta Energies for Each Unit (← links)
- 05000348/LER-1986-018, :on 860808,09 & 0923,hourly Firewatch Patrol Not Performed Per Tech Spec 3.7.12.Caused by Cognitive Personnel Errors.Personnel Counseled (← links)
- 05000348/LER-1986-022, :on 861117,automatic Isolation Capability of RHR Sys Loop Suction Valves Required W/O Operability of Function.Caused by Personnel Errors.Personnel Reinstructed in Duty Performance & Event Discussed (← links)
- 05000348/LER-1987-010, :on 870514,w/unit Operating at 100% Reactor Power,Reactor Tripped Due to Steam Flow Greater than Feedwater Flow Coincident W/Low Steam Generator Level.Caused by Personnel Error.Individual Counseled (← links)
- 05000348/LER-1987-009, :on 870510,during Performance of Svc Water (SW) Flowpath Verification,Rhr Pump 1B Room Cooler SW Isolation Valves Found Closed.Caused by Personnel Not Ensuring That Valves Repositioned.Personnel Counseled (← links)
- 05000348/LER-1986-021, :on 861105,containment Equipment Hatch Left as Nonfunctional Fire Barrier Longer than seven-day Period. Continuous Fire Watch Established.Hatch Closed on 861108.W/ (← links)
- 05000348/LER-1986-020, :on 861107,RCS Pressure Increased Uncontrollably Prior to Reactor Coolant Pump Startup.Caused by Operator Error.Rhr Loop Suction Pressure Relief Valve Opened (← links)
- 05000348/LER-1987-008, :on 870504,fire Watch Discovered Not Posted as Required by Tech Spec 3.7.11.2 & Fire Door Left W/O Being Properly Closed.Caused by Personnel Error.Door Closed Immediately.Warehouseman Counseled (← links)
- 05000348/LER-1986-013, :on 860804,fire Watch Not Established as Required by Tech Spec.Caused by Cognitive Personnel Error. Failure to Station Fire Watch Discussed W/Individual Involved (← links)
- 05000348/LER-1986-015, :on 860805,reactor Trip & Subsequent Main Steam Line Isolation Occurred.Caused by Reduction in Feedwater Flow to Steam Generator 1C Due to Failed Printed Circuit Card.Card Replaced (← links)
- 05000348/LER-1986-014, :on 860801,both Trains of Charging Pumps Inoperable.Caused by Clogged Gear Oil Coolers.Svc Water Task Force Established to Investigate Problem (← links)
- 05000348/LER-1986-019, :on 861028,six Tubes Exceeded Pluggable Limit Based on Eddy Current Testing Results.Cause Not Stated.Two Tubes Plugged in Steam Generator 1C & Four Tubes Plugged in Steam Generator 1A (← links)
- 05000348/LER-1987-005, :on 870118,two Containment Isolation Valves in Sump Discharge Line Penetration Failed to Close During Surveillance.Caused by Faulty Solenoid Valve.Solenoid Replaced & Valve Returned to Svc (← links)
- 05000348/LER-1997-014, :on 970922,discovered RCS Leak Detection Sys Inoperable.Caused by Defective Procedure in That Sys Design Criteria Were Not Adequately Incorporated Into Plant Operating Procedures.Revised Procedure (← links)
- 05000348/LER-1987-004, :on 870122,during Nuclear Instrumentation Sys Power Channel N-42 Calibr & Functional Test Reactor Tripped. Caused by Failure of Inverter 1A.Four Blown Fuses Replaced & Inverter Returned to Svc (← links)
- 05000348/LER-1987-002, :on 870108,reactor Tripped Due to Manual Tripping of Main Turbine to Investigate Leak in Msiv.Caused by Cracked Air Supply Line to MSIV & Inadequate Clearance for Main Steam Line.Air Line Replaced (← links)
- 05000348/LER-1986-016, :on 860819,fire Protection Sys 1A-108 Disabled to Support Extensive Architectural Mods.Sys Could Not Be Returned to Svc within 14 Days Per Tech Specs Due to Scope of Mods.Sys Returned to Svc on 860916 (← links)
- 05000348/LER-1987-003, :on 870109,reactor Tripped on lo-lo Steam Generator Level Following Manual Tripping of Main Turbine. Caused by Failure to Monitor Steam Generator Feed Pumps Suction Pressure Adequately.Procedure Revised (← links)
- 05000348/LER-1987-001, :on 870105,containment Atmosphere Particulate Radioactivity Monitor Discovered Inoperable Due to Improper Valve Alignment.Caused by Personnel Failure to Follow Procedures.Personnel Counseled (← links)
- 05000348/LER-1987-007, :on 870405,w/unit in Mode 3,reactor Trip Signal Generated When Source Range Nuclear Instrument N-31 Failed High.Caused by Failed Detector.Source Range Detector Replaced (← links)
- 05000348/LER-1987-006, :on 870324,discovered That Hourly Fire Watch Not Performed in Room 223.Caused by Personnel Error. Individuals Involved Counseled (← links)
- 05000348/LER-1986-012, :on 860723,reactor Protection Sys Actuation Occurred in One Train While in Test.Caused by Cognitive Personnel Error.Worker Involved Counseled (← links)
- 05000348/LER-1988-019, :on 880928,fire Detection Sys Declared Inoperable for More than 14 Days.Caused by Spurious Alarm Which Would Not Clear.Fire Detection Sys Repaired During Unscheduled Outage (← links)
- 05000348/LER-1988-020, :on 881012,discovered That Sprinkler Fire Protection Sys Inoperable Since 881006,violating Tech Spec 3.7.11.2.Caused by Personnel & Improper Planning,Testing & Restoration.Workers Involved Counseled (← links)
- 05000348/LER-1986-007, :on 860518,reactor Tripped Due to Turbine Trip. Caused by Deteriorated Diaphragm on Turbine Interface Valve Allowing auto-stop Oil Pressure to Drop Below Trip Setpoint. Valve Replaced & Preventive Maint Task Created (← links)
- 05000348/LER-1986-009, :on 860714,ESF Actuated When Penetration Room Filtration Sys Started Automatically.Caused by Personnel Error During Removal of Radiation Monitor R-25A from Svc for Maint.Technician Counseled (← links)
- 05000348/LER-1983-029-03, /03L-0:on 830601,overpower Delta Temp Channel I Declared Inoperable Upon Receipt of Overpower Delta T Single Input Alert.Caused by Failure of Overpower Delta Temp Bistable Card.Card Replaced (← links)
- 05000348/LER-1986-010, :on 860716,penetration Room Filtration Sys Started Automatically Due to Inadvertent Actuation of ESF Equipment.Caused by Inadequate Procedures.Procedures Revised (← links)
- 05000348/LER-1986-011, :on 860715,Train a HVAC Dampers in Control Room & Computer Room Tripped Causing Inadvertent Actuation of ESF Equipment.Caused by Personnel Error While Replacing Recorder for Radiation Monitor R-35A (← links)
- 05000348/LER-1986-008, :on 860702,reactor Trip Occurred Due to High Negative Flux Rate & Rod F-14 Dropping Into Core.Caused by Electrical Short in Containment Penetration Module Supplying Power to Stationary Gripper Coil of Rod (← links)
- 05000348/LER-1998-008-01, :on 981223,reactor Vessel Support Concrete Design Bases Temperature Exceeded Due to Closed Cooling Damper.Caused by Personnel Error.Damper Opened & Secured in Position.With (← links)
- 05000348/LER-1986-005, :on 860430,Westinghouse Notified Util That 27 Fuel Rods in Region 9 Had U Weights in Excess of Tech Specs. Subsequent Checks Identified 289 Rods W/Excess Weight.Tech Spec Amend Will Be Submitted (← links)
- 05000348/LER-1998-007-02, :on 981106,found Several TSP Circumferential Indications & Several TSP Axial Indications Extending Just Beyond Edge of Tsp.Caused by Tube Defects.Sg Tubes Have Been Plugged or Repaired as Required (← links)
- 05000348/LER-1998-006-03, :on 981124,PRF Sys Suction Damper Was Outside Design & Licensing Basis.Caused by 1976 Personnel Failure to Identify Noted Inconsistency.Scheduled Design Change in 1999 to Modify Dampers to Ensure Licensing Basis Are Met (← links)
- 05000348/LER-1983-013-03, /03L-0:on 830329,instrumentation Loop Associated W/Steam Generator 1A Level Transmitter LT-475 Declared Inoperable Due to Low Indication.Caused by Failure of Power Supply Card.Card Replaced (← links)
- 05000348/LER-1999-002-02, :on 990527,Unit 1 Reactor Trip Occurred Following Loss of 1A SG Feedwater Pump.Caused by Personnel Error.Unit Was Stabilized in Hot Standby.With (← links)
- 05000348/LER-1988-016, :on 880525,fire Door 408 Inoperable for More than 7 Days.Caused by Damage on Door Secured in Open Position to Facilitate Access While Doing Work in Area.Door Repaired & Returned to Functional Status (← links)
- 05000348/LER-1986-006, :on 860429,RHR Sys Train B Inoperable.Caused by Personnel Error,Resulting in Improper Opening & Tagging of Breaker.Personnel Counseled & Main Control Board Verification Procedures Developed (← links)
- 05000348/LER-1998-005-03, :on 981021,automatic Start of B Train Penetration Room Filtration Occurred Due to Filling Sf Tc. Caused by Inadequate Procedure.Changed Procedure to Provide Specific Guidance for Filling SFP Tc.With (← links)
- 05000348/LER-1986-004, :on 860228,while Operating in steady-state at 99% Power,Reactor Trip Occurred Due to High Negative Flux Rate Detected by Power Range Nuclear Detectors.Caused by Dropped Control Rod.Fuses Replaced (← links)
- 05000348/LER-1986-002-01, :on 860214,Train a & B post-accident Hydrogen Analyzers on Both Units Inoperable.Caused by Inappropriate Design Change.Analyzers Rewired to Original Configuration (← links)
- 05000348/LER-1988-014, :on 880424,fire Barrier Penetration 17-139-9 Breached.Caused by Failure to Fill Up Forms for 880417 Breached Penetration.Penetration Sealed & Personnel Reinstructed Re Breaching Penetration (← links)
- 05000348/LER-1988-013, :on 880425,fire Detection Sys 1A-22,disabled on 880411 to Support Mods to Containment Cooler Svc Water Piping,Not Returned to Svc within 14 Days.Caused by Scope of Work.Rept Submitted Per Tech Spec 3.3.3.9 (← links)
- 05000348/LER-1998-004-03, :on 980909,turbine Trip & Consequent Reactor Trip Occurred.Caused by Reactor Protection Sys Card Failure. Failed Card Was Replaced & Unit 1 Returned to Power on 980910.With (← links)
- 05000348/LER-1988-011, :on 880413 & 0505,Tech Spec 3.7.12 Violated. Caused by Containment Personnel & Equipment Hatches Being Open for More than 7-day Limit.Personnel & Hatches Will Be Closed Prior to Entry Into Hot Shutdown (← links)
- 05000348/LER-1988-010, :on 880411,determined That Individually Neither of Control Room Pressurization Units Able to Maintain Required Pressure of at Least 0.125 Inches Water Gauge. Caused by Open Penetrations (← links)
- 05000348/LER-1988-012, :on 880421,fire Hose Station N1V43-D-128 Inoperable for More than 14 Days.Caused by Inability to Effect Timely Repair of Broken Valve.Valve Will Be Repaired as Soon as Replacement Parts Arrive (← links)
- 05000348/LER-1988-009, :on 880412,fire Dampers Discovered Inoperable. Caused by Design Deficiency.Design Changes Initiated to Evaluate Options Available & Provide Appropriate Design to Ensure Proper Operation of Fire Dampers (← links)
- 05000348/LER-1988-008, :on 880420,during Current Cycle 8 - 9 Refueling outage,17 Tubes Exceeded Pluggable Limit Based on Eddy Current Testing Results.Tubes Plugged (← links)
- 05000348/LER-1998-003-04, :on 980816,determined That Wgdt Hydrogen & Oxygen Had Exceeded Concentration Limits,Per TS 3.11.2.5. Caused by Undetected Leak.Leak Was Identified & Isolated & Waste Gas Sys Was Returned to Svc on 980818.With (← links)
- 05000348/LER-1998-005, :on 980315,failure to Perform Nuclear Instrumentation Surveillance Requirements Prior to Mode 2 & 3 Entry,Was Discovered.Caused by Personnel Error.Revised Applicable Procedures (← links)
- 05000348/LER-1998-002-05, :on 980816,SG Tube Leakage Investigation,Repair & Evaluation,Occurred.Caused by ODSCC in Two Locations on Same Tube.Operational Leak Rate Limit Requiring Plant Shutdown Has Been Administratively Reduced (← links)
- 05000348/LER-1988-006, :on 880301,determined That Hydrogen Accumulating in Supply Line from RHR Pump.Caused by Piping Configuration in Layout of Train Supply Line A.Hydrogen Vented from Piping.Periodic Program Initiated (← links)
- 05000348/LER-1985-017, :on 851007,fire Dampers Found Inoperable & Not Repaired within 7 Days.Caused by Personnel Failing to Ensure That Procedure Contains Requirements.Procedure Revised & Individual Counseled (← links)
- 05000348/LER-1997-011, :on 970706,TS 3.0.3 Was Entered Due to Failure to Follow Work Control Process Procedure.Operations & Maintenance Personnel Will Be Instructed on Expectations That Specific Limits Must Be Documented (← links)
- 05000348/LER-1988-017, :on 880615,Tech Spec Action Requirement Not Met for Inoperable Fire Hose Station in That Addl Hose Not Brought to Area within 1 H.Caused by Personnel Error. Day Shift Sys Operator Counseled (← links)
- 05000348/LER-1988-007, :on 880306,both 1A & 1B Battery Were Inoperable for 19 Minutes & Tech Spec 3.0.3 Entered.Caused by Failure of 1B Battery Charger While Swing Charger 1C Aligned to 1A Battery.Failed Parts Replaced (← links)
- 05000348/LER-1988-003, :on 880212,discovered Special Rept Required by Tech Spec 3.7.12 for Inoperable Fire Door Not Submitted. Caused by Personnel Errors.Individuals Responsible Counseled (← links)
- 05000348/LER-1988-002, :on 880120,master Override Switch for Pyrotronics Panel Found in Override Position,Causing Preaction Water Protection Sys to Be Inoperable.Caused by Personnel Error.Individual Counseled (← links)
- 05000348/LER-1988-001-01, :on 880114,unauthorized Contractor Employee Entered Main Control Room.Caused by Personnel Error. Contractor Escorted Out & Counseled.Local Alarm Installation & Applicable Training Programs Planned (← links)
- 05000348/LER-1988-005, :on 880226,fire Door 453 Inoperable for More than 7 Days.Caused by Broken Latching Device.Lock Set on Door Replaced & Door Declared Operable on 880227 (← links)
- 05000348/LER-1997-008, :on 970423,determined Condition Existed Where Unit 1 May Have Been Operated Outside Design Basis of Plant. Caused by Personnel Error.Existing Shim Configuration on 1C SG Modified (← links)
- 05000348/LER-1988-004, :on 880219,hourly Fire Watch Patrol Not Established as Required.Caused by Personnel Error.Fire Watch Patrol Established & Personnel Counseled (← links)
- 05000348/LER-1978-062-01, /01T-0 on 780922:during Inspec of Class I & II Pipe Restraints/Snubbers,Noted That Main Feedwater Line Lateral Seismic Restraint FW-R49 Was Not in Place.Reason or Date of Removal Not Determined;Unit Reinstalled (← links)
- 05000348/LER-1978-061-03, /03L-0 on 780905:failure of 1-2A Diesel Generator to Respond to Voltage/Speed Control in Auto Due to Failure of Motorized Potentiometer(Failed Diodes)Causing the 125V DC Supply Fuses to Blow (← links)
- 05000348/LER-1978-061, Forwards LER 78-061/03L-0 (← links)
- 05000348/LER-1997-009, :on 970430,lack of Missile Protection for Svc Water Flow Switches Occurred.Caused by Inadequate Design. Automatic Isolation Function of Isolation Valves from SW Bldg to DG Bldg,Disabled (← links)
- 05000348/LER-1997-007-01, :on 970422,plant Had Operated in Condition That Was Outside Design Basis Due to Degraded Cork Matl.Caused by Insufficient Routine Insps.Completed Repair of Missing Seal & Containment Wall on Unit 2 on 970421 (← links)
- 05000348/LER-1996-007, :on 961107,IEEE-279 Requirements Were Not Met for Protection Channel III SG Instrumentation.Caused by Personnel Error.Implemented Administrative Controls (← links)
- 05000348/LER-1997-006-01, :on 970401,SG Tube Degradation & Tube Status Was Reported.Caused by Defects in Tube Sheet & Expansion Transition Degradation.Sg Tubes Have Been Plugged or Repaired (← links)
- 05000348/LER-1983-010-03, /03L-0:on 830305,during Performance of Safety Injection W/Loss of Offsite Power Test,Rhr Pump 1B Declared Inoperable.Caused by Design Error Which Led to Damage to Train B Handswitch (← links)
- 05000348/LER-1985-012, :on 850623,reactor Trip Occurred Due to High Negative Flux Rate.Caused by Shutdown Bank & Control Rods E-11 & L-11 Dropping Into Core Due to Electrical Short.Fuses Replaced & Cables Reterminated.Module Ordered (← links)
- 05000348/LER-1985-015, :on 850925,determined That Positive & Negative Rate Trip Settings Existing Before 850619 Outside Tech Spec Tolerance.Caused by Incorrect Interpretation of Vendor Info. Procedure Revised (← links)
- 05000348/LER-1985-001, :on 850214,gaps Along Portions of Tops of Two Fire Walls Not Sealed within 7 Days as Required by Tech Spec 3.7.12.Firewatch Patrols Established.Design Changes Developed & Implemented for Sealing Gaps (← links)
- 05000348/LER-1997-004-01, :on 970318,safety Related 600 Volt Position Sensitive Seismic Qualification Was Not Seismically Qualified in All Positions.Caused by Personnel Error. Operating Procedures Modified (← links)
- 05000348/LER-1986-003, :on 860220,inadequate Design Calculation Re post-LOCA Cooldown by Westinghouse for Cycle 7 Reload Discovered.Util Working W/Westinghouse to Ensure Adequate Calculations for Future Reload Designs (← links)
- 05000348/LER-1985-018, :on 851009,air-operated Valve Failed to Stroke During Testing.Caused by Valve Actuator Cylinder Exhaust Breather Cap Being Painted Over During Installation.Breather Caps on Affected Unit 1 & 2 Valves Replaced (← links)
- 05000348/LER-1986-001, :on 860110,discovered That Containment Atmosphere Particulate Radioactivity Monitor Inoperable Due to Improper Valve Alignment.Caused by Personnel Error. Monitor Returned to Svc Upon Discovery (← links)
- 05000348/LER-1985-005-01, Forwards Results of Testing/Insp of 11 Tendon Anchor Heads, Based on Commitment in 850812 LER 85-005-01 to Conduct Addl Tests & Insps on Tendon Anchor Heads Which Failed Due to Hydrogen Stress Cracking.Anchor Heads Acceptabl (← links)
- 05000348/LER-1985-019, :on 851023,fifth,sixth & Seventh Smoke Detectors in Fire Protection Sys 1A-32 Discovered Inoperable Since 850709.Caused by Personnel Error.Hourly Fire Watch Patrol Initiated (← links)
- 05000348/LER-1997-002, :on 970218,discovered That SR 4160 Volt AC Breakers Not Seismically Qualified in Any Position Except in Connect Position.Caused by Personnel Error.Modified Operating Procedures (← links)
- 05000348/LER-1997-001-01, :on 970206,TS Ventilation Sys Deficiencies Discovered.Caused by Cognitive Personnel Error.Applicable Procedures Addressing Inadequate Flow Test Revised & Responsible Person Coached on Event (← links)
- 05000348/LER-1996-006, :on 961008,Kaowool Fire Barrier Sys on Six Unit 1 Raceways Did Not Comply with Program Requirements. Caused by Personnel Error.Hourly Fire Watches Established & Will Remain Until Sys in Compliance (← links)
- 05000348/LER-1985-013, :on 850717,during Steady State Operation at 100% Power,Reactor Trip Occurred Due to lo-lo Water Level in Steam Generator 1B.Caused by Spurious Indication of Excessive Thrust Bearing Wear (← links)
- 05000348/LER-1985-016, :on 851002,plant Experienced Electrical Shorts Between Conductors in GE Series 100 Low Voltage Control Electrical Containment Penetration Modules.Caused Attributed to Separated Adjacent Connectors (← links)
- 05000348/LER-1985-014, :on 850828,ESF Equipment Actuation Occurred When Diesel Generator 2C Started Automatically.Caused by Technician Accidentally Bumping Manual Operator of Emergency Start Relay.Technician Counseled (← links)
- 05000348/LER-1996-004, :on 960620,SR Not Met for Manual SI Input Into RT Sys.Cause of Missed Surveillance Was Cognitive Personnel Error & Failure to Ensure Surveillance Test Procedure. Revised Procedures (← links)
- 05000348/LER-1985-011, :on 850620,maint Work Inadvertently Performed on Train B Pressurization Heater Control Circuit Instead of Train A.Caused by Unspecified Maint Work Request & Personnel Error.Personnel Counseled (← links)
- 05000348/LER-1985-010, :on 850608,reactor Trip Occurred Due to Underfrequency on Reactor Coolant Pump Buses.Caused by Personnel Error & Procedural Inadequacy.Personnel Counseled & Procedures Revised (← links)
- 05000348/LER-1985-004-01, :on 850415,both Doors of Containment Auxiliary Air Lock Discovered Open.Caused by Worker Improperly Exiting Containment Through Airlock.Caution Tag Placed on Interior Door of Air Lock to Prevent Recurrence (← links)
- 05000348/LER-1985-003-01, :on 850413,ESF Equipment Actuated Inadvertently While Testing.Caused by Electrician Shorting Circuit W/Tool. Tools for Procedure Will Be Properly Insulated to Prevent Short Circuits (← links)
- 05000348/LER-1992-005-01, :100% Eddy Current Insps of Available Tubes in All Three SG Determined That 169 Tubes,Previously in Svc, Defective & Require Classification as Category C-3.Caused by Stress Corrosion Cracking.Tubes Plugged (← links)
- 05000348/LER-1992-006-01, :on 921028,inadvertent Actuation of ESF Occurred When Electrician Allowed Jumper to Make Contact W/ Adjacent Terminal Inside Sequencer.Event Discussed W/ Personnel & Electrician Coached (← links)
- 05000348/LER-1985-009-01, :on 850517,reactor Protection Sys Actuation Occurred When lo-lo Water Level Signal in Steam Generator 1B Indicated.Caused by Personnel Error Due to Inadequate Instructions.Personnel Counseled (← links)
- 05000348/LER-1981-019-03, /03L:on 810408,radiation Monitors R11 & R12 Declared Inoperable When Supply Breaker to Motor Control Ctr Inadvertently Opened.Caused by Personnel Error.Breaker Closed & Monitors Returned to Svc (← links)
- 05000348/LER-1992-007-01, :on 921128,230 Kv Switchyard Breakers 800 & 904 tripped,de-energizing 1A Startup Transformer Causing LOSP Esfa.Caused by Inoperable U-bend Heaters Due to Blown Fuses. Switchyard Breakers Have Been Replaced (← links)
- 05000348/LER-1992-008-01, :on 921213,reactor Tripped on Feedwater Flow Less than Steam Flow Coincident W/Low SG Water Level on C Sg.Caused by Cracked Fuse.Sampling Fuse Insp Will Be Performed on 7300 Relays Cards (← links)
- 05000348/LER-1985-008-01, :on 850506,suction Valves a & B Closed When RHR & Overpressure Mitigation Sys Made Inoperable by Common Cause.Caused by Procedural Inadequacy & Personnel Error. Procedure Revised (← links)
- 05000348/LER-1979-065-03, /03L-0:on 791122,main Steam Isolation Valve 3370C Failed to Close When Hand Switch Was Placed in Closed Position.Caused by Faulty Mcb Hand Switch.Switch Replaced & Tested & Valve Returned to Svc (← links)
- 05000348/LER-1979-064-03, /03L-0:on 791213,during Surveillance Test,Steam Line Differential Pressure Safety Injection Signal Comparator Pb 486B Tripped Below Tech Spec Limit.Cause Not Stated.New Card Installed & Calibr.Channel Operable (← links)
- 05000348/LER-1979-030-03, /03L-0 on 790717:during Surveillance test,600 Volt Ctr 1C Supply Breaker EE07 Failed to Load Shed.Caused by Open Links in Local Control Panel.Links Closed & Breaker Verified (← links)
- 05000348/LER-1985-007-01, :on 850411,Fire Door 401 Declared Inoperable & Could Not Be Repaired within 7 Days.Caused by Loose auto- Closure Mechanism & Loose Astragal.Fire Watch Established. New Door Assembly Ordered (← links)
- 05000348/LER-1985-006-01, :on 850423,tube in Steam Generator 1c,plugged During Refueling Outage,Exceeded Pluggable Limit.Cause Not Stated.Results of Steam Generator Tube Inservice Insp Will Be Reported (← links)
- 05000348/LER-1992-004-01, :on 920831,fire Door Discovered Blocked Open by Drain Hose W/No Fire Watch Established.Caused by Procedural Inadequacy.Fire Protection Program Will Be Revised (← links)
- 05000348/LER-1985-002-01, :on 850313,reactor Tripped.Caused by lo-lo Water Levels in Steam Generators 1B & 1C Due to Spurious Actuation of Limit Switch on Msiv.Switch Replaced.Msiv Turbine/Reactor Trip Functions Verified (← links)
- 05000348/LER-1992-003-01, :on 920728,inadvertent Actuation of motor-driven Afp & RHR Pump 1A Occurred During Augmented Testing.Caused by Incorrect Placement of Jumper,Which Defeated Design Feature.Operator Coached (← links)
- 05000348/LER-1996-005, :on 960827,valves Misalignment Occurred Due to Personnel Error in Missed Surveillance.Provided Summary of Event & Mgt Expectations to Appropriate Operations Personnel (← links)
- 05000348/LER-1996-003, :on 960602,actuation of ESF Equipment Occurred Due to Relay Contact Failure.Relay Replaced (← links)
- 05000348/LER-1996-002-01, :on 960529,TS Surveillance Requirements Not Met & common-cause Failure Identified.Caused by Personnel Error. Revised Surveillance Test Procedures & Modified Underfrequency Reactor Trip Circuits (← links)
- 05000348/LER-1984-021, :on 841008,hourly Fire Watch Not Conducted in Accordance W/Tech Spec 3.3.3.9 When Fire Alarm for Svc Water Intake Structure Cut Out.Caused by Personnel Error.Personnel Counseled & Fire Alarm Returned to Svc (← links)
- 05000348/LER-1996-001, :on 960322,discovered Plant Periodically Operating in Condition Prohibited by Tech Specs 3.3.2.Caused by Cognitive Personnel Error.Applicable Test Procedures Revised (← links)
- 05000348/LER-1985-001-01, :on 850214,unsealed Gaps Discovered Between Tops of Two Masonry Fire Walls & Room Ceilings.Cause Unknown.Design Changes Developed to Seal Gaps (← links)
- 05000348/LER-1984-022, :on 841024,isolation Valve for Fire Protection Sys 1SW-111 Closed & No Fire Watch Posted.Caused by Personnel Failure to Follow Procedures.Valve Opened. Individual Counseled (← links)
- 05000348/LER-1984-019, :on 840217,during Control Room Insp,Seven Cables in Fire Barrier Penetration Not Sealed Internally. Caused by Procedural Inadequacy.Procedures Revised to Provide Specific Guidance for Installation (← links)
- 05000348/LER-1984-017, :on 840815,main Feedwater Regulating Valve 1A Placed on Manual Jack for Repair of Leaking Diaphragm, Rendering Feedwater Isolation Inoperable.Caused by Air Leak. Diaphragm Replaced (← links)
- 05000348/LER-1984-016, :on 840815,discovered Surveillance Test Procedure for Measuring Stroke Time of Reactor Coolant Drain Tank Discharge Containment Isolation Valve LCV-1003 to Be Inadequate (← links)
- 05000348/LER-1984-015, :on 840121 & 0202,hourly Fire Watch Patrol Posted Instead of Continuous Fire Watch.Caused by Personnel Error.Individual Reinstructed.Administrative Procedures Revised (← links)
- 05000348/LER-1984-014, :on 840804,found Potentiometers for Channel NI-43 Input to OT-delta-T Circuit Not Adjusted.Caused by Procedural Inadequacy in Adjustments.Rev to Procedures Planned (← links)
- 05000348/LER-1992-002-01, :on 920330,discovered That Hourly Fire Watch Patrol Not Performed & Fire Detection Sys Went Into Spurious Alarm & Declared Inoperable.Caused by Personnel Error.Fire Watch Established within 1 H (← links)
- 05000348/LER-1984-013, :on 840716,continuous Fire Watch Not Posted in Closed Cooling Water HX & Pump Room While Maint Personnel Performing Grinding & Welding Operations.Watch Posted & Maintained Until No Longer Required (← links)
- 05000348/LER-1995-011, :on 951114,unplanned Manual Actuation of ESF Occurred Due to Personnel Error.Coached Personnel Re Simulation of Activities Associated W/Emergency Drills.W/ (← links)
- 05000348/LER-1995-010, :on 951105,ESF Equipment Actuation Occurred Due to Loss of Mfw.Sgfp Lube Oil Pressure Regulating Sys on Both Units Was Properly Adjusted (← links)
- 05000348/LER-1995-009, :on 951008,classified Results of SG Tube Insps Performed During Unit 1 Thirteenth Refueling Outage of 328 Tubes as Category C-8 Due to 3.34% of Tubes Inspected Being Defective.Required Tubes Plugged or Repaired (← links)
- 05000348/LER-1984-020, :on 840907,control Room Fire Barrier Penetrations 01-155-02 & 06-155-03 Found Not to Be Sealed Per Tech Specs.Cause Not Stated.Penetrations Sealed & Declared Operable on 840912 (← links)
- 05000348/LER-1995-007-01, :on 950927,discovered That Control Room Pressurization Units Moisture Controllers Incapable of Performing Intended Function Due to Procedural Inadequacy. Established Repetitive PM Tasks (← links)
- 05000348/LER-1995-008, :on 950916,loop a Main Steam Line Isolation Valves (MSIV) Failed to Close Due to Personnel Error.Loop a MSIVs Vented & Closed,Test Procedure Modified & Operator Coached on Event (← links)
- 05000348/LER-1984-018, :on 840211,RHR Sys Trains a & B Made Inoperable.Caused by Sys Being Placed in Recirculation Mode. Both Trains Returned to Normal Lineup (← links)
- 05000348/LER-1991-012, :on 911229,discovered That RHR Suction Valve Automatic Isolation Test Did Not Include Verification That RCS Suction Valves Could Be Opened from Control Board.Caused by Procedural Inadequacies.Procedure Revised (← links)
- 05000348/LER-1984-011, :on 840501,train B Svc Water Battery Declared Inoperable.Caused by Cell 42 Having Specific Gravity Below Limits.Affected Cell & Two Neighboring Cells Replaced (← links)
- 05000348/LER-1992-001-01, :on 920214,missed Containment Penetrations. Caused by Procedural Error.Procedure FNP-0-STP-14.0 Revised to Meet Surveillance Requirements.Verifications Confirmed That Affected Valves in Proper Position (← links)
- 05000348/LER-1984-009, :on 840311,spare Containment Electrical Penetrations WC02,EB02,EB04,EC05 & EC10 Opened for Mods Designed to Comply W/Reg Guide 1.97 & Enhance Outage Work. Firewatch Performed.Mods Completed 840322 (← links)
- 05000348/LER-1984-008, :on 840302,determined That Control Room Fire Barrier Penetration for NRC Red Phone Cable Not Properly Sealed.Caused by Personnel Error.Penetration Sealed. Personnel Reinstructed on Proper Installation (← links)
- 05000348/LER-1984-004, :on 840229,during Planned Maint on Msivs, Surface Indications in Operator Side Packing Bland Area Discovered on Three of Six Shafts.Investigation Ongoing.All Six Shafts Will Be Replaced (← links)
- 05000348/LER-1984-007, :on 840220,during Troubleshooting,Automatic Actuation Portion of Diesel Bldg Cardox Fire Supression Sys Deemed Inoperable.Caused by Wiring Error.Wiring Error Corrected (← links)
- 05000348/LER-1984-006, :on 840223,w/unit in Mode 6,both Containment Personnel Airlock Doors Opened Simultaneously for 30 S. Cause Undetermined.Inner Door Immediately Closed (← links)
- 05000348/LER-1995-006-01, :on 950710,licensed Matl Was Shipped to Incorrect Destination by Common Carrier.Fnp Contacted Owner & Verified Receipt Following Shipment of Licensed Matl (← links)
- 05000348/LER-1984-001, :on 840109,reactor Tripped Due to low-low Level in Steam Generator 1B.Caused by Low Bearing Oil Pressure Tripping Pump 1A.Automatic Rod Control to Be Repaired & Source Range Detectors Replaced (← links)
- 05000348/LER-1995-005-01, :on 950611,spurious MSIV Closure Resulted in Reactor Trip.Caused by Water Intrusion from Room Cooler Leakage.Room Cooler Leak Repaired (← links)
- 05000348/LER-1991-011, :on 911023,discovered That Component Cooling Water Valve Inservice Test Contained Inadequate Sys Lineup to Determine If Valve Would Seat Against Reverse Flow.Caused by Procedural Inadequacy.Procedures Revised (← links)
- 05000348/LER-1991-010, :on 911003,operators Manually Tripped Reactor Due to Unexpected Automatic Closure of Main Turbine Governor Valves.Caused by Degraded Dc Voltage Output.Degraded Power Supply Replaced (← links)
- 05000348/LER-1983-036-03, /03L-0:on 830629,steam Generator 1B wide-range Level Indicator on Remote Shutdown Panel Declared Inoperable Due to Erratic Readings.Caused by Failure of Printed Circuit Card.Card Replaced (← links)
- 05000348/LER-1984-012, :on 840421,train B Reactor Trip Signal Occurred During Response Time Test.Caused by Improper Performance of Surveillance Test Procedure.Personnel Involved Counseled Re Adherence to Procedures (← links)
- 05000348/LER-1984-005, :on 840409,reactor Tripped Due to Low Level in Steam Generator 2A in Conjunction W/Loop 1 Steam Flow Greater than Feed Flow.Caused by Operator Error During Performance of FNP-2-STP-33.1.Relay Replaced (← links)
- 05000348/LER-1984-010, :on 840406,discovered Adequate Local Leak Rate Testing Not Performed on Fuel Transfer Tubes Since 790529. Caused by Use of Improper Test Connection Due to Procedural inadequacy.FNP-1-STP-627 Revised (← links)
- 05000348/LER-1995-004, :on 950426,inadvertent Actuation of ESF Occurred.Caused by Personnel Error Re Improper Technique in Handling of Energized Test Lead.Technician Coached on Proper Handling Techniques (← links)
- 05000348/LER-1982-061-03, /03L-0:on 821221,diesel Generator 1B Declared Inoperable When Generator Failed to Start During Performance of Diesel Generator Operability Test.Caused by Fouling of air-start Valves by lint-like Substance.Valves Cleaned (← links)
- 05000348/LER-1978-092-03, /03L-0 on 781229:during FNP-1-STP-20.0,pentration Room Exhaust Fan 1B Would Not Run for Required 15 Min.Caused by Dirt Buildup in Exhaust Fan Motor Resulting in Bearing Failure & Power Supply Trip While Running (← links)
- 05000348/LER-1983-063-03, /03L-0:on 831206,instrumentation Channel Associated W/Level Indicator LI-4075A (Refueling Water Storage Tank) Declared Inoperable Due to Erroneous High Indication.Caused by Transmitter Box Leak.Cover Repaired (← links)
- 05000348/LER-1983-088-03, /03L-0:on 831112,train B Emergency Air Cleanup Sys Declared Inoperable When Damper HV-3629 Failed to Close on Receipt of Simulated High Radiation Signal.Caused by Failure of Damper Solenoid Valve.Valve Repaired (← links)
- 05000348/LER-1983-087-03, /03L-0:on 831203,train a Chlorine Detector Declared Inoperable When Dampers HV-3624 & HV-3628 Failed to Close on Receipt of Simulated High Chlorine Signal.Caused by Failure of Solenoid Valves.Valves Replaced (← links)
- 05000348/LER-1983-084-03, /03L-0:on 831204,motor Driven Auxiliary Feed Pump 1A Declared Inoperable Due to Valve QIN23V002A (Mdafp) Discharge Check Valve Leaking.Caused by One Missing & One Worn Hinge Pin Bushing.Hinge Bushings Replaced (← links)
- 05000348/LER-1983-086-03, /03L-0:on 831122,instrumentation Channel Associated W/Reactor Coolant Pump C Bus Undervoltage Declared Inoperable Due to Low Trip Setpoint.Caused by Relay Drifting Out of Tolerance.Relay Adjusted (← links)
- 05000348/LER-1983-082-03, /03L-0:on 831202,specific Gravity on Auxiliary Bldg Train a Battery Cell 40 Found Low.Cause Undetermined. Affected Cell Recharged (← links)
- 05000348/LER-1983-081-03, /03L-0:on 831201,river Water Pump 4 Declared Inoperable Due to Broken Lower Pump Bearing Lube Water Supply Line.Caused by Failed Fitting Between Line & Pump. Fitting Replaced (← links)
- 05000348/LER-1983-080-03, /03L-0:on 831125,spent Fuel Storage Area Radiation Monitor R-5 Declared Inoperable Due to Erroneous Indication. Caused by Loose Connection.Connection Repaired (← links)
- 05000348/LER-1983-085-03, /03L-0:on 831204,Containment Spray Sys Valve Inservice Tests FNP-1-STP-16.7 Not Performed within Allowed Time.Sys Declared Inoperable.Caused by Personnel Error.No Cause Found Re Improper Valve Stroking (← links)
- 05000348/LER-1983-083-03, /03L-0:on 831206,during Auxiliary Bldg Battery Quarterly Verification FNP-1-STP-605.4,train B Auxiliary Bldg Battery Declared Inoperable Due to Voltage Decrease from Original Acceptance Test on Cell 1 (← links)
- 05000348/LER-1983-061-03, /03L-0:on 831119,valve on Nitrogen Supply to Accumulator Isolation Declared Inoperable When Valve Failed to Fully Close.Cause Not Determined.Valve Will Be Repaired at Next Outage (← links)
- 05000348/LER-1983-079-03, /03L-0:on 831120,during Performance of Diesel Generator Operability,Diesel Generator 1-2A Declared Inoperable Due to Excessive Noise & Load Oscillation.Caused by Cracked Cylinder Liner.Liner Replaced (← links)
- 05000348/LER-1991-009, :on 910819,reactor Trip Occurred.Caused by Lightning Induced Instantaneous Overcurrent Trip.Engineering Study Performed Investigating Possible Methods of Preventing Lightning Induced Reactor Trips (← links)
- 05000348/LER-1991-005, :on 910518,discovered Unit Changed Operational Modes While Valve in Flow Path for Turbine Driven Auxiliary Feedwater Pumps Not in Correct Position.Caused by Procedural Inadequacy.Plant Procedures Revised (← links)
- 05000348/LER-1983-078-03, /03L-0:on 831105,Loop 3 Overtemp Delta Temp Instrumentation Channel Declared Inoperable Due to Failure of Delta Flux Input.Caused by Blown Fuse.Fuse Replaced (← links)
- 05000348/LER-1983-077-03, /03L-0:on 831104 & 10,Train B & Train a Chlorine Detectors,Respectively,Declared Inoperable Due to Broken Detector Tapes.Probably Caused by Interference from Tape Motion Indicators.Indicators Removed (← links)
- 05000348/LER-1983-057-03, /03L-0:on 831102,entry Into Mode 3 Made While Solid State Protection Sys Train a Removed for Performance of FNP-2-STP-33.0.Caused by Personnel Error.Train a Returned to Svc & Heatup Resumed (← links)
- 05000348/LER-1991-008, :on 910802,automatic Reactor Trip Occurred Due to Loss of Power to Reactor Coolant Pump Breaker Position. Caused by Personnel Error.Personnel Involved Counseled & Event Included in Next Cycle (← links)
- 05000348/LER-1983-076-03, /03L-0:on 831022,monthly Hydrogen Analyzer Surveillance of Hydrogen Recombiner 2B Not Current,Per Tech Specs.Caused by Failure to Check Surveillance Record. Recombiner Secured on 831022.Personnel Counseled (← links)
- 05000348/LER-1983-075-03, /03L-0:on 831018,train a Control Room Emergency Air Cleanup Sys Declared Inoperable When Damper HV-3626 (Ofc/Computer HVAC Supply) Failed to Close Automatically or Manually.Caused by Failure of Solenoid Valve (← links)
- 05000348/LER-1983-074-03, /03L-0:on 831018,instrumentation Channels Associated W/Rtds TE-412A (Loop 1 Hot Leg) & TE-412D (Loop 1 Cold Leg) Declared Inoperable Due to Erroneous Indication. Caused by Failure of Amplifier Card.Card Replaced (← links)
- 05000348/LER-1983-073-03, /03L-0:on 831018,train a Chlorine Detector Declared Inoperable Due to Broken Detector Tape.Caused by Failure of Shaft Which Holds Tape Cassette in Place.Shaft Repaired (← links)
- 05000348/LER-1983-072-03, /03L-0:on 831013,14 & 17,instrumentation Channel for Flow Transmitter FT-495 Declared Inoperable Due to Erroneous Indication.Cause Not Determined.Msivs Closed & Limiting Condition for Operation Cleared (← links)
- 05000348/LER-1983-071-03, /03L-0:on 831012,train B Air Conditioner Compressor Tripped.Caused by Solenoid Valve Linkage on Evaporator Line Being Out of Adjustment.Linkage Adjusted (← links)
- 05000348/LER-1983-070-03, /03L-0:on 831010,changing Pump Suction Head Motor Operated Valves Inadvertently Removed from Emergency Core Cooling Valve Inservice Test.Caused by Personnel Error. Test Revised (← links)
- 05000348/LER-1983-069-03, /03L-0:on 831008,radiation Monitors R-11 & R-12 Declared Inoperable When Vacuum Pump Tripped.Caused by Electrical Transient Resulting from Unit 2 Loss of Offsite Power.Pump Reset & Monitors Returned to Svc (← links)
- 05000348/LER-1984-003-01, :on 840218,detensioning of Reactor Vessel Head Studs Begun W/Rcs Boron Concentration Greater than Tech Spec Limits.Caused by Misinterpretation of Tech Specs.Personnel Counseled (← links)
- 05000348/LER-1984-002-01, :on 840210,reactor Tripped from Approx 10% Power Due to Intermediate Range High Flux Signal.Caused by Overly Conservative Trip Setpoints.New Trip Setpoints Inputed (← links)
- 05000348/LER-1995-003, :on 950206,determined That Train a of Ssps Potentially Susceptible to Failure in Event of Postulated High Energy Steamline Break.Caused by Spss Design. Maintenance/Surveillance Activities Restricted (← links)
- 05000348/LER-1983-060-03, /03L-0:on 830912,instrumentation Channel for Flow Transmitter FT-415 Declared Inoperable Due to Erratic Indications.Caused by Failure of Nlp Card.Card Replaced (← links)
- 05000348/LER-1983-058-03, /03L-0:on 830829,instrumentation Channels Associated W/Level Indicators LI-3594A & LI-3594B Declared Inoperable When Indicators Turned Off.Caused by Procedural Inadequacy.Procedure Revised (← links)
- 05000348/LER-1995-002, :on 940424,main Control Board Annunciator Differential Flux Deviation Alert Inoperable.Caused by Personnel Failure to Ensure Plant Computer Updated. Annunciator Response Procedure Revised (← links)
- 05000348/LER-1995-001, :on 950113,reactor Trip Occurred Due to Loss of Turbine DEHC Overspeed Protection.Root Cause Analysis Investigation Was Performed.Mods Performed to Reduce Vulnerability of OPC Processor (← links)
- 05000348/LER-1983-096-03, /03L-0:on 831230 & 31,train a Air Conditioner Compressor Tripped.Control Room Emergency Air Cleanup Sys Declared Inoperable.Caused by Low Freon.Unit Refilled & High Pressure Valve Tightened (← links)
- 05000348/LER-1983-095-03, /03L-0:on 831226,loop 1 Overtemp Delta Temp Instrumentation Channel Declared Inoperable When Temp Indicator TI-412C Failed Low.Caused by Failed Summing Ampere Card.Card Replaced (← links)
- 05000348/LER-1983-094-03, /03L-0:on 831226,train B Control Room Emergency Air Cleanup Sys Declared Inoperable When Air Conditioner Compressor Failed to Start.Caused by Hi/Lo Oil Pressure Tripping.Switch Reset (← links)
- 05000348/LER-1983-093-03, /03L-0:on 831225,diesel Generator 1B Declared Inoperable When Svc Water Supply Header Inlet & Outlet Isolation Valves Closed.Caused by Frozen Switch Due to Cold Weather.Valves Opened Manually (← links)
- 05000348/LER-1983-065-03, /03L-0:on 831227,instrumentation Channel Associated W/Temp Indicator TI-432D Declared Inoperable. Caused by Drift of Lead/Lag Card Gain.Card Replaced & Channel Declared Operable (← links)
- 05000348/LER-1983-092-03, /03L-0:on 831225,instrumentation Channel Associated W/Pressure Transmitter PT-494 Declared Inoperable.Caused by Localized Freezing in Sensing Lines Due to Cold Weather.Lines Thawed Out (← links)
- 05000348/LER-1983-091-03, /03L-0:on 831226,radiation Monitor R-5 Declared Inoperable Due to Erroneous Indication.Caused by Faulty Connection.Connection Repaired & Monitor Declared Operable (← links)
- 05000348/LER-1983-090-03, /03L-0:on 831224,radiation Monitors R-11 & R12 Declared Inoperable When Vacuum Pump Tripped.Caused by Flow Rate Set Too High.Method for Adjusting Flow Rate Revised & Monitors Returned to Svc (← links)
- 05000348/LER-1983-007-03, /03L-0:on 830114,electrical Penetration Q1T52B038-B Failed Local Leak Rate Test.Caused by O-ring Damage at Inner Seal from Repairs During Previous Refueling outage.O-rings Replaced (← links)
- 05000348/LER-1983-002-03, /03L-0:on 830128,source Range Detector NI-31 Declared Inoperable Due to Low Detector Voltage.Caused by Setpoint Drift.High Voltage Power Supply Adjusted & Detector Returned to Svc (← links)
- 05000348/LER-1983-089-03, /03L-0:on 831215,radiation Monitor R-11 Declared Inoperable Due to Improper Valve Lineup.Caused by Personnel Error.Valve Lineup Corrected (← links)
- 05000348/LER-1991-002-01, :on 910408,temporary Strainer Discovered Installed in Pump Suction Piping of Charing Pumps 1B & 1C. Caused by Inadequate Planning & Documentation.Strainers Removed from Charging Pumps (← links)
- 05000348/LER-1983-043-03, /03L-0:on 831001,RHR Loop a Suction Relief Valve Q2E11V015A Declared Inoperable Due to Relief Setpoint Being Out of Tolerance.Caused by Setpoint Drift.Setpoint Adjusted (← links)
- 05000348/LER-1983-062-03, /03L-0:on 830907,during Calibr & Functional Test, Train B Chlorine Detector Declared Inoperable When Zero Potentiometer Found to Be Malfunctioning.Potentiometer Replaced (← links)
- 05000348/LER-1983-059-03, /03L-0:on 830906,train B Control Room Emergency Air Cleanup Sys Declared Inoperable When Train B Air Conditioner Compressor Tripped.Caused by Solenoid Valve Linkage on Pump Down Line Out of Adjustment (← links)
- 05000348/LER-1983-044-03, /03L-0:on 830808,radiation Monitors R-11 & R-12 Declared Inoperable When Vacuum Pump Tripped.Caused by Failed Inboard Vacuum Pump.Pump Replaced (← links)
- 05000348/LER-1983-032-03, /03L-0:on 830808,radiation Monitors R-11 & R-12 Declared Inoperable When Vacuum Pump Tripped.Cause Undetermined.Pump Valved in & Placed Back in Svc (← links)
- 05000348/LER-1991-007, :on 910629,reactor Trip Occurred.Caused by Detection of phase-to-ground Fault by Protective Relaying for Y Winding of 1B Unit Auxiliary Transformer.Transformer Removed from Svc,Isolated & Grounded (← links)
- 05000348/LER-1991-006, :on 910524,inadvertent OTDT Reactor Trip Occurred During Testing.Caused by Failure to Request Drawing Rev When Spare RTD Was Placed in Svc.Appropriate Maint & Plant Mod Personnel Trained (← links)
- 05000348/LER-1991-004-01, :on 910423,RWST Water Inadvertently Drained to Containment Floor Occurred When Maint Personnel Opened Motor Operated Valves.Caused by Personnel Error.Movs Closed Stopping Spill & SS Involved Disciplined (← links)
- 05000348/LER-1983-035-03, /03L-0:on 830610,vacuum Pump Tripped & Containment Atmosphere Activity Particulate Monitor R-11 & Gaseous Monitor R-12 Declared Inoperable.Caused by Failure of Inboard Pump During Maint on Outboard Pump (← links)
- 05000348/LER-1983-034-03, /03L-0:on 830616,pressurizer Pressure Dropped Below Tech Spec Limits During Startup.Caused by Personnel Error.Rcs Boration,Combined W/Load Increase,Resulted in Pressurizer Pressure Drop.Personnel Counseled (← links)
- 05000348/LER-1983-033-03, /03L-0:on 830615,RCS Average Temp Dropped Below Tech Spec Requirements During Routine Startup.Caused by Personnel Error,Requesting Too Large Steam Demand During Main Steam Line Warmup.Responsible Operators Counseled (← links)
- 05000348/LER-1983-046-03, /03L-0:on 830811 & 12,train B Containment Hydrogen Analyzers,Train Control Room Air Cleanup Sys,Train B RCS Subcooling Margin Monitor & Instrument Channel LI3594B & LI3282B Declared Inoperable.Caused by Tripping of Breaker (← links)
- 05000348/LER-1983-022-03, /03L-0:on 830511,during Monthly Operability Check, Charging Pump 1C Declared Inoperable When Breaker DG06 Would Not Close.Caused by Broken follower-roller in Breaker Spring Charging Mechanism.Broken Part Replaced (← links)
- 05000348/LER-1983-024-03, /03L-0:on 830512,rod Control Sys Declared Inoperable Upon Receipt of Failure Alarm on Power Cabinet 2AC.Caused by Failure of Regulator Circuitry Card.Card Replaced (← links)
- 05000348/LER-1983-023-03, /03L-0:on 830511,train B Reactor Trip Breaker Would Not Reclose.Caused by Design Inadequacy.Voltage Available to Undervoltage Device Coil Marginally Sufficient to Allow Undervoltage Device to Remain Latched (← links)
- 05000348/LER-1983-041-03, /03L-0:on 830726,during Svc Water Bldg Battery Weekly Verification & on 830727,during Quarterly Verification,Train B Svc Water Battery Determined Inoperable Due to Cell 59 Having low-specific Gravity (← links)
- 05000348/LER-1983-040-03, /03L-0:on 830720,steam Generator 1B Level Transmitter LT-486 Instrumentation Channel Declared Inoperable Due to Loss of Power Supply.Caused by Power Supply Failure on Signal Comparator Card.Card Replaced (← links)
- 05000348/LER-1983-019-03, /03L-0:on 830415,pressurizer Pressure Fell Below Tech Spec Limits During Performance of FNP-1-STP-201.1B. Caused by Personnel Failure to Verify Instrumentation Channel Selector Switches Prior to Initiating Test (← links)
- 05000348/LER-1983-018-03, /03L-0:on 830413,RCS Temp Average Fell Below Tech Spec Limit.Caused by Excessive Leakby on 1A Main Feedwater Regulating Bypass Valve.Stroke on 1A Main Feedwater Regulating Bypass Valve Adjusted & Verified (← links)
- 05000348/LER-1983-025-03, Reactor Coolant Pump 2A Undervoltage Relay 27-3 Declared Inoperable Due to Out of Tech Spec Condition.Caused by Setpoint Drift.Relay Adjusted (← links)
- 05000348/LER-1983-039-03, /03L-0:on 830718,rod Control Sys Declared Inoperable Following Urgent Failure Alarm Received on Rod Control Logic Cabinet.Cause Unknown.Alarm Reset.Failure Lights & Alarm Cleared (← links)
- 05000348/LER-1983-016-03, /03L-0:on 830412,diesel Generator 1B Declared Inoperable Due to Start Failure Resulting in Inoperability of Train B Due to Loss of Emergency Power.Caused by Mechanical Binding of Fuel Filter Constant Vent Check Valve (← links)
- 05000348/LER-1991-003, :on 910430,steam Generator Tube Degradation Occurred.Caused by Leaks & Circumferential Cracks.Program of Boric Acid Addition Continued to Reduce Potential for SCC & Pressure Pulse Cleaning Process Being Used (← links)
- 05000348/LER-1994-004, :on 940602,valve Actuator Spacer Bolts Found to Be of Incorrect Matl.Bolts of Correct Matl Installed in Actuator & Turbine Steam Admission Valve (← links)
- 05000348/LER-1983-009-03, /03L-0:on 830307,train a RHR Sys Declared Inoperable When RHR Pump 1A Inadvertently Secured.Caused by Misinterpretation of Instructions.Personnel Instructed to Communicate Clearly.Rhr Pump 1A Started (← links)
- 05000348/LER-1983-031-03, /03L-0:on 830610,during Solid State Protection Sys Operability Test,Loop 3 Steam Line Differential Pressure Instrumentation Channel Declared Inoperable.Caused by Failure of Universal Card.Card Replaced (← links)
- 05000348/LER-1983-030-03, /03L-0:on 830607,during Administrative Review, Stroke Time Test for Turbine Driven Auxiliary Feedwater Pump Steam Admission Valve 3235B Determined Not Performed After 830603 Maint.Caused by Personnel Error (← links)
- 05000348/LER-1983-026-03, /03L-0:on 830526,containment Particulate Activity Monitor R-11 Declared Inoperable.Caused by Vacuum Pump Failure.Monitor Declared Operable Following Alignment to Alternate Pump.Inoperable Pump Replaced (← links)
- 05000348/LER-1983-006-01, /01T-0:on 830215,both Trains of Common Control Room Filtration Unit Penetration Room Filtration Sys Carbon Filters Train a Failed to Meet Criteria for Iodine Removal Efficiency.Caused by Misinterpretation of Reg Guide 1.52 (← links)
- 05000348/LER-1983-021-03, /03L-0:on 830506,power Supply Breaker HBL7R Opened.Possibly Caused by Personnel Inadvertently Tripping Breaker by Closing Locker.Locker Moved (← links)
- 05000348/LER-1982-032-03, /03L-0:on 820701,1A Reactor Coolant Pump Underfrequency Relay 81-2 Failed to Trip During Underfrequency Test.Caused by Faulty Relay.Relay Replaced & Declared Operable (← links)
- 05000348/LER-1982-036-03, /03L-0:on 820623,boron Injection Tank Flowpath Train a Heat Tracing Declared Inoperable When Temp Fell Below 145 F.Caused by Personnel Error in Setting Controlling Thermostat Too Low.Thermostat Adjusted (← links)
- 05000348/LER-1983-020-03, /03L-0:on 830420,overtemp Delta Temp Instrumentation Loop B Associated w/TI422C Declared Inoperable Due to Reading Out of Tolerance W/Other Channels. Caused by Drift of Summing Amplified Card (← links)
- 05000348/LER-1982-006-03, /03L-0:on 820128,during Realignment of Swing CCW Pump to a Train,Miscellaneous Header Misaligned cross-connecting Two CCW Loops.Caused by Failure to Perform FNP-2-SOP-23.0.Valves Properly Realigned (← links)
- 05000348/LER-1982-002-03, /03L-0:on 820129,radiation Monitor R24A (Containment Gaseous Activity Purge & Exhaust Isolation) Declared Inoperable.Caused by Flow Fault Due to Pump Failure.Pump Replaced (← links)
- 05000348/LER-1983-017-03, /03L-0:on 830417,specific Gravity of Train a Svc Water Battery Bank Cells 34 & 43 Less than 1.190.Cause Undetermined.Cells Replaced & Battery Bank Returned to Svc (← links)
- 05000348/LER-1994-001, :on 940521,1A Component Cooling Pump (B-train) Failed to Start.Caused by Supply Breaker Prop Latch Spring Detachment.Esf Related 4160 Volt Breaker on Both Units Verified as Being Properly Charged (← links)
- 05000348/LER-1983-011-03, /03L-0:on 830322,during Control Room Train A-B Ventilation Operability Test,Train Control Room Emergency Ventilation Sys B Declared Inoperable.Caused by Failed Damper Due to Breaker Overload.Overloads Reset (← links)
- 05000348/LER-1983-008-03, /03L-0:on 830213,penetration Room Filtration Sys Declared Inoperable When Surveillance Test Not Performed Per Tech Specs.Caused by Personnel Error.Test Performed & Sys Declared Operable on 830214 (← links)
- 05000348/LER-1982-058-03, /03L-0:on 821025,during Performance of Power Range Neutron Flux Channel calibr,overtemp-delta Temp Instrumentation Loop Declared Inoperable.Caused by Dirty Contacts on Printed Circuit Card C3-125.Contacts Cleaned (← links)
- 05000348/LER-1991-001, :on 910123,hourly Fire Watch Patrol Required by Tech Spec 3.3.3.9 Not Performed.Caused by Personnel Error. Fire Watch Patrol Established Immediately & Involved Shift Foreman Counseled (← links)
- 05000348/LER-1982-057-03, /03L-0:on 821001,during Reactor Coolant Pump Bus Reactor Trip Undervoltage Relay Calibr,Reactor Coolant Pump 1A Undervoltage Relay 27-3 Discovered Out of Spec.Caused by Setpoint Drift.Setpoint Adjusted (← links)
- 05000348/LER-1990-008, :on 901112,emergency Diesel Generator 2C Tripped.Caused by Defective Spring in Handswitch for Generator Output Breaker.Handswitch Replaced (← links)
- 05000348/LER-1982-040-03, /03L-0:on 820919,loss-of-voltage Protection Channel Associated w/B2F Sequencer Phase 2-3 Declared Inoperable.Caused by Failure of loss-of-voltage Relay 27XF1 During Testing.Relay Cleaned (← links)
- 05000348/LER-1982-039-03, /03L-0:on 820919,svc Water to Component Cooling Water HX 2C Isolated.Caused by Dislodged Pin Holding Worm Drive Gear Allowing Differential Pressure Across Valve Disc to Close Valve.Pin Reinstalled & Secured (← links)
- 05000348/LER-1982-055-03, /03L-0:on 820921,train B Chlorine Detector Declared Inoperable Due to Nonadvancing Detector Tape.Caused by Faulty Tape Drive Motor.Motors & Light Diffusion Disc Replaced (← links)
- 05000348/LER-1982-054-03, /03L-0:on 820920,flow Transmitter FT-497 Failed Low.Caused by Failure of Nlp Printed Circuit Card in 7300 Process Control Sys.Card Replaced & Instrumentation Loop Associated W/Transmitter Returned to Svc (← links)
- 05000348/LER-1990-007, :on 901013,preaction Fire Protection Sys Clapper Valves Failed to Trip (← links)
- 05000348/LER-1994-002, :on 940326,S/G Tube Insp Determined That 12 Tubes Were Defective.Cause Was Pwscc.Corrective Action:S/G Tubes Have Been Plugged or Sleeved (← links)
- 05000348/LER-1982-037-03, /03L-0:on 820905,A Train Auto Trip Logic for High Steam Generator Differential Pressure Declared Inoperable When Failed Cord Indication Received by Automatic Tester. Caused by Failure of Universal Card.Card Replaced (← links)
- 05000348/LER-1982-052-03, /03L-0:on 820831,during Control Room Emergency Ventilation Performance Test,B Train Emergency Air Cleanup Sys Failed to Meet Acceptance Criteria.Caused by Failure of Charcoal Filter to Meet Efficiency Requirements (← links)
- 05000348/LER-1983-004-03, /03L-0:on 830114,main Steam Safety Valves Q1N11V010A,Q1N11V010C,Q1N11V011C & Q1N11V012B Declared Inoperable Due to Relief Setpoint Being Out of Tolerance. Caused by Setpoint Drift.Valves Readjusted (← links)
- 05000348/LER-1983-003-03, /03L-0:on 830114,during Calibr & Functional Test, B Train Chlorine Detector Declared Inoperable Due to Failure of Tape Advance Mechanism.Caused by Paper Drive Motor Gear Failure.Paper Drive Replaced (← links)
- 05000348/LER-1983-005-01, /01T-0:on 830130,fuel Cladding Damage Found on 11 Cycle 4 Baffle Fuel Assemblies Located at Corner Injection Baffle Joints.Caused by Vibrations Induced by Water Jetting Through Baffle Joints.Design Mod Implemented (← links)
- 05000348/LER-1978-087-03, /03L-0 on 781221:vibration Readings Taken on River Water Pump 4 Exceeded Acceptable Limits.Work on Pump Bedplate,Adjustment of Impeller Lift & Pump/Motor Realignment Restored Vibration to W/In Acceptable Range (← links)
- 05000348/LER-1978-085-03, /03L-0 on 781120:train a River Water(Rw)Pump 9 Secured Due to Vibration.Tech Specs Req at Least 2 Independent RW Loops to Be Operable.Caused by Bearing Damage Due to Fouling of Lube/Cooling Piping (← links)
- 05000348/LER-1978-086-03, /03L-0 on 781221:both Trains of Component Cooling Water Were Discovered to Be cross-connected at Charging Pump 1B.FNP-1-STP-23.7 Was Rev to Show Alignment of Charging Pump 1B to Either Train (← links)
- 05000348/LER-1978-085, Forwards LER 78-085/03L-0 (← links)
- 05000348/LER-1978-086, Forwards LER 78-086/03L-0 & 78-087/03L-0 (← links)
- 05000348/LER-1978-088-03, /03L-0 on 781125:Train a River Water Pumps Were Found in Tripped Condition & Could Not Be Started from Control Room.Cause of Occurrence Is Undetermined (← links)
- 05000348/LER-1978-088, Forwards LER 78-088/03L-0 (← links)
- 05000348/LER-1982-060-03, /03L-0:on 821217,leakage Rate for RCS Exceeded Required Rate.Caused by Failure to seal-wire Seal Injection Throttle Valves.Valves Adjusted & seal-wired (← links)
- 05000348/LER-1978-084-03, /03L-0 on 781114:both Containment Atmosphere Particulate (R-11) & Gaseous (R-12) Radioactivity Monitoring Sys Were Declared Inoperable After Vacuum Pump Tripped & Would Not Restart,Due to Broken Wire in low-flow Relay (← links)
- 05000348/LER-1978-084, Forwards LER 78-084/03L-0 (← links)
- 05000348/LER-1978-083-03, /03L-0 on 781102:noted That FNP-1-STP-41.2 Specified IR Neutron Flux High Level Trip Setpoint Limits Were Less Conservative than Tech Spec Limits.Caused by Failure to Revise FNP-1-STP-41.2 to Reflect New Setpoint (← links)
- 05000348/LER-1978-083, Forwards LER 78-083/03L-0 (← links)
- 05000348/LER-1978-079-01, /01T-0:on 781114,water Levels in Both Fire Protec Sys Water Storage Tanks Were Approx 135,000 Gallons Less than Prescribed Min Due to Water Diverted for Hydrostatic Test by Const Personnel (← links)
- 05000348/LER-1978-079, Forwards LER 78-079/01T-0 (← links)
- 05000348/LER-1982-059-03, /03L-0:on 821207,boron Concentration in Boron Injection Tank Was Below Tech Spec Requirements.Caused by Personnel Error.Concentration Returned to Normal Level & Personnel Counseled on Proper Procedures (← links)
- 05000348/LER-1978-038-03, /03X-1 on 780527:during Unit Startup,B S/G Code Safety Valve Lifted Causing Tavg to Drop Below 541 Degrees F in Violaion of T/S3.1.1.5.Caused by Broken Lower Adjusting Ring Locking Pin.Valve Was Replaced (← links)
- 05000348/LER-1978-081-03, /03L-0 on 781102:during Surveillance Test FNP-0- STP-15.0,exterior Door Seals Were Leaking.Caused by Dirty Air Lock Exterior Door Seals.Seals Cleaned & Retested Satisfactorily (← links)
- 05000348/LER-1978-080-03, /03L-0 on 781027:while in Mode 1,the Steam Line Pressure Instru Assoc W/Pressure Transmitter PT-484 Failed Low.Caused by Failure of Loop Pwr Supply isolated/non- Isolated(Nlp)Card POY-484 (← links)
- 05000348/LER-1978-080, Forwards LER 78-080/03L-0, 78-081/03L-0 & 78-038/03X-1 (← links)
- 05000348/LER-1978-082-03, /03L-0 on 781025:B Train Penetration Room Filtration Sys Inoperable.Caused by Low Spring Tension on Filter Support Assembly (← links)
- 05000348/LER-1978-082, Forwards LER 78-082/03L-0 (← links)
- 05000348/LER-1978-078-03, /03L-0 on 781016:the a Train Undervoltage Relay 27-1 on RCP 1A Failed to Trip at Required Setpoint During Test Procedure FNP-1-612.0 Due to Setpoint Drift (← links)
- 05000348/LER-1978-078, Forwards LER 78-078/03L-0 (← links)
- 05000348/LER-1978-077-03, /03L-0:on 781011,1B Diesel Generator Declared in Oper When Inner Stage Relief on B Air Compressor Lifted. Cause:Desiccant from Recently Installed Air Dryers.B Air Compressor Replaced & Desiccant Removed (← links)
- 05000348/LER-1978-072-03, /03L-0 on 781003:during FNP-1-STP-40.3,the 1C Diesel Generator Output Breaker Failed to Close on 4160V Bus 1H After D/G auto-started,due to Incorrect Landing of Jumper Installed for Unit 1/Unit 2 Separation (← links)
- 05000348/LER-1978-071-03, /03L-0 on 781003:train a River Water Pumps Found in Tripped Condition & Could Not Be Started from Control Room,Caused by Low Level Reed Switch Failure in Pond Level Switch LS511 (← links)
- 05000348/LER-1978-066-03, /03X-1 on 780914:inspec of Diesel Generator Bldg Noted Lb D/G Air Start Sys Air Reservoir 1A,1B Pressures Were 210 PSIG & 80 Psig,Due to 1B Air Compressor Relief Valve/Check Valve Leakage (← links)
- 05000348/LER-1978-064-03, /03X-1 on 780909:during Surveillance Test FNP-1- STP-22.0,the Turbine Driven Auxiliary Feedwater Pump Failed to Start When Trip/Throttle Valve Tripped Shut & Control Was Lost on Valves 3228A,B,C,due to Failed Tdafpcircuit Re (← links)
- 05000348/LER-1978-071, Forwards LER 78-071/03L-0, 78-072/03L-0,78-064/03X-1 & 78-066/03X-1 (← links)
- 05000348/LER-1978-068-03, /03L-0:on 780917,during Surveillance Test Procedure FNP-L-STP-40.3,diesel Generator JB auto-started, But Frequency Would Not Increase Over 58.5Hz.Caused by Loose Coupling Between Dc Motor & Potentiometer (← links)
- 05000348/LER-1978-067-03, /03L-0:on 780917,during Change from Hot to Cold Shutdown,Both Containment Spray Pumps Tagged Out.Caused by Defective Procedure (← links)
- 05000348/LER-1978-063-03, /03L-0:on 780913,feedwater Flow Instrument Associated W/Flow Transmitter FT-476 Failed Low.Caused by Failure of Loop Power Supply Card Due to Instrument Drift (← links)
- 05000348/LER-1978-065-03, /03L-0:on 780912,steam Generator 1A Pressure Indicator on Hot Shutdown Panel Showed 0.Channel for Steam Generator 1A Declared Inoperable.Failure of Indicator Believed to Be Struck Meter Movement (← links)
- 05000348/LER-1982-047-03, /03L-0:on 820813,containment Airlock Declared Inoperable When Airlock Outer Door Could Not Be Shut.Caused by Excessive Wear in Keyway on Shaft of Outer Airlock Door. New Keyway Cut & New Key Installed (← links)
- 05000348/LER-1982-035-03, /03L-0:on 820814,RCS Subcooling Monitor Channel 1 Declared Inoperable Due to Invalid Main Control Board Meter Readings.Caused by Faulty Printed Circuit Card.Card Replaced & Channel 1 Recalibr & Returned to Svc (← links)
- 05000348/LER-1982-050-03, /03L-0:on 820815,train B Chlorine Detector Declared Inoperable Due to Detector Tape Not Advancing. Caused by Sheared Pin in Paper Drive Motor.Pin Replaced & Detector Returned to Svc (← links)
- 05000348/LER-1982-048-03, /03L-0:on 820823,reactor Coolant Drain Tank Level Control Valve Failed to Close Upon Receipt of Close Signal. Cause Undetermined.Valve Worked When Stroked Several Times Subsequent to Event (← links)
- 05000348/LER-1982-043-03, /03L-0:on 820804,instrumentation Loop Associated W/Turbine Impulse Pressure Transmitter PT-447 Declared Inoperable When Transmitter Failed Low.Caused by Faulty Power Supply Card.Card Replaced (← links)
- 05000348/LER-1982-042-03, /03L-0:on 820805,containment Isolation Valve CCW-MOV-3052 Declared Inoperable When Position Indication Light Not Lit.Caused by Blown Fuse in Control Circuit.Fuse Replaced & Valve Declared Operable (← links)
- 05000348/LER-1982-041-03, /03L-0:on 820804,circuit Breaker for Vacuum Pump Supplying Containment Atmosphere Radioactivity Monitors R11 & R12 Tripped.Cause Undetermined.Breaker Reset & Pump Started (← links)
- 05000348/LER-1982-046-01, /01T-0:on 820819,during Design Review,Determined That High Energy Line Break Pressure Switches Associated W/Steam Generator Blowdown Piping May Not Sense Pertinent Pressures.Caused by Design Inadequacy (← links)
- 05000348/LER-1982-038-03, /03L-0:on 820727,determined That FNP-0-STP-130 (Fire Hose stations-monthly) & FNP-0-STP-132 (Hydrant Hose House insp-monthly) Not Performed within Required Time Interval.Caused by Personnel Error (← links)
- 05000348/LER-1990-006, :on 900928,notification of Unusual Event Declared Based on Calculated Site Boundary Dose Rate (← links)
- 05000348/LER-1993-003, :on 930923,recognized That CR Pressurization Boundary Had Been Affected by Maint in Progress on a Train, Due to Improper Planning for Work Given to Maintaining Cr. Licensee Implemented Change to Data Base Sys (← links)
- 05000348/LER-1990-005, :on 900720,reactor Tripped Manually Following Automatic Trip of Steam Generator 1A Feed Pump.Caused by Failure of Speed Sensor Converter.Speed Sensor Converter Replaced (← links)
- 05000348/LER-1990-004, :on 900628,determined That Procedural Inadequacy Caused Improper Surveillance of Accumulators. Sample Purge Time Too Short to Ensure Representative Sample. Procedures Revised (← links)
- 05000348/LER-1982-024-03, /03L-0:on 820601,containment Atmosphere Activity Monitors R-11 & R-12 Declared Inoperable When Inboard & Outboard Pumps Tripped Due to Erroneous Low Flow Signal. Caused by Setpoint Drift.Setpoints Adjusted (← links)
- 05000348/LER-1982-029-03, /03L-0:on 820605,containment Airlock Declared Inoperable When Airlock Outer Door Could Not Be Shut.Caused by Broken Door Shaft.Shaft Repaired (← links)
- 05000348/LER-1982-028-03, /03L-0:on 820605,during Performance of FNP-1-STP-22.16,turbine Driven Auxiliary Feedwater Pump Failed to Start.Caused by Faulty Limit Switch on Valve HV-3226.Limit Switch Replaced (← links)
- 05000348/LER-1982-023-03, /03L-0:on 820528,determined That FNP-2-STP-19.3 Not Performed within Time Interval Specified by Tech Spec 4.0.5.Caused by Personnel error.FNP-2-STP-19.3 Satisfactorily Performed (← links)
- 05000348/LER-1982-027-03, /03L-0:on 820526,turbine Driven Auxiliary Feedwater Pump Declared Inoperable When Main Control Board Annunciator Indicated Trip Throttle Valve Closed.Cause Unknown.Valve Reopened (← links)
- 05000348/LER-1982-018-03, /03L-0:on 820601,turbine Driven Auxiliary Feedwater Pump Tripped.Caused by Inadvertent Actuation of Overspeed Trip Mechanism During Insp of Pump Trip Linkage. Trip Throttle Valve Reopened (← links)
- 05000348/LER-1982-022-03, /03L-0:on 820519,during Performance of FNP-2-STP-4.7,charging Pump 2A Would Not Start.Caused by Failure of Breaker DF06 to Close Due to Misaligned Microswitch Arm.Arm Repaired (← links)
- 05000348/LER-1982-025-03, /03L-0:on 820519, a Train Chlorine Detector Declared Inoperable When Alarm Sounded & Would Not Reset. Caused by Faulty Photocell Light Bulbs.Bulbs Replaced & Detector Returned to Svc (← links)
- 05000348/LER-1982-020-03, /03L-0:on 820504,snubber 2MS-R-530 Declared Inoperable Since Reservoir Devoid of Fluid.Caused by Fluid Leak on Improperly Installed O Rings.O Rings Replaced & Snubber Declared Operable (← links)
- 05000348/LER-1982-019-03, /03L-0:on 820508,exhaust Fan Failed to Start, Rendering B Train Penetration Room Filtration Sys Inoperable.Caused by Worn Fan Belts Which Slipped Off Pulleys.Belts Replaced (← links)
- 05000348/LER-1982-012-03, /03L-0:on 820318,boron Injection Tank Train a Heat Tracing Inoperable Due to Failure of Two Circuits in Train. Caused by Electronic Failure Due to Heat Buildup in Electronic Cabinets.Controller Cards Replaced (← links)
- 05000348/LER-1982-011-03, /03L-0:on 820316,120-volt Ac Vital Bus B de-energized When Inverter 2B Tripped.Caused by Failed Inverter 2B Due to Blown Fuse in Voltage Regulator Circuit. Fuse Replaced (← links)
- 05000348/LER-1982-010-03, /03L-0:on 820304,during RCS Leakage Test, Unidentified RCS Leak Rate Exceeded Tech Spec Limit.Caused by Packing Leak from Flow Control Valve FCV 122.Packing Adjusted (← links)
- 05000348/LER-1982-009-03, /03L-0:on 820312,instrumentation Loop Associated W/Pressurizer Pressure Transmitter PT-455 Declared Inoperable When Transmitter Failed Low.Caused by Faulty Power Supply Card.Card Replaced (← links)
- 05000348/LER-1982-008-03, /03L-0:on 820307,instrumentation Loop Associated W/Steam Flow Transmitter FT-476 Declared Inoperable When Transmitter Failed Low.Caused by Faulty Power Supply Card. Card Replaced & Calibr (← links)
- 05000348/LER-1982-007-03, /03L-0:on 820305,remote Shutdown Panel Pressurizer Level Indicator LI-459Z Declared Inoperable When Failed High.Caused by Faulty Transmitter Amplifier Board.Board Replaced & Transmitter Calibr (← links)
- 05000348/LER-1982-021-03, /03L-0:on 820428,2A Recombiner Oxygen Outlet Analyzer Declared Inoperable When B2 Oxygen Fuel Cell Failed.Cause Not Stated.Fuel Cell Replaced (← links)
- 05000348/LER-1982-021-01, /01T-0:on 820510,while Conducting Shift Turnover & Main Control Board Walkdown,Both Containment Spray Suction Valves from Reactor Water Storage Tank Were Closed.Caused by Operator Error.Valves Opened (← links)
- 05000348/LER-1982-016-03, /03L-0:on 820403,pressurizer Level Indicator LI- 459Z on Hot Shutdown Panel Declared Inoperable.Caused by Faulty Transmitter Amplifier Card.Card Replaced & Instrumentation Channel Returned to Svc (← links)
- 05000348/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000348/LER-1982-017-03, /03L-0:on 820413,FI-497 (Steam Generator 1C Feedwater Flow) Instrumentation Channel Declared Inoperable When Max Allowable Channel Check Error Was Exceeded.Caused by Faulty Transmitter Amplifier Card.Card Replaced (← links)
- 05000348/LER-1982-015-03, /03L-0:on 820408,radiation Monitor 25A (Spent Fuel Storage Pool Area Gaseous activity-ventilation Sys Isolation) Declared Inoperable While Performing Test.Caused by Dirty Contacts on Mod Selector Switch.Contacts Cleaned (← links)
- 05000348/LER-1982-014-03, /03L-0:on 820326,28 & 0408,B Train Chlorine Detector Declared Inoperable Due to Detector Tape Not Advancing.Caused by Movement Indicator Binding Detector Tape & Sheared Pin in Tape Drive Mechanism (← links)
- 05000348/LER-1982-013-03, /03L-0:on 820317,containment Atmosphere Activity Monitors R-11 (Particulate Monitor) & R-12 (Gaseous Monitor) Declared Inoperable Due to Failure of Vacuum Pump.Caused by Failed Outboard Pump.Filter & Gasket Replaced (← links)
- 05000348/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000348/LER-1982-005-03, /03L-0:on 820217,B Train Ventilation Sys Declared Inoperable When Sys Failed to Maintain Greater than or Equal to 1/8-inch Water Gauge Positive Pressure in Control Room. Caused by Insp Port Improperly Closed.Port Closed (← links)
- 05000348/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000348/LER-1982-006-01, /01T-0:on 820310,levels in Fire Protection Tanks a & B Fell to Approx 85,000 Gallons Each as Result of Inadvertent Actuation of Fire Protection Deluge Sys on Cooling Tower 1A.Caused by Personnel Error (← links)
- 05000348/LER-1982-006, Forwards LER 82-006/01T-0 (← links)
- 05000348/LER-1982-003-03, /03L-0:on 820219,inner & Outer Containment Doors Opened Momentarily in Violation of Containment Integrity. Caused by Mechanical Failure of Interlock Mechanism.Doors Were Manually Closed Immediately (← links)
- 05000348/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000348/LER-1993-001-01, :on 930607,determined RCP UV & Underfrequency Portion of RT Sys,& TDAFP Autostart Signal from RCP Bus UV Contained Design Deviation Due to Personnel Error. Procedural Guidance Enhanced (← links)
- 05000348/LER-1982-004-03, /03L-0:on 820128,seven Unsealed Penetrations Determined to Be Inoperable Fire Barrier Penetrations. Penetrations Sealed & Visually Inspected (← links)
- 05000348/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000348/LER-1981-075-03, /03L-0:on 811222,fuel Storage Pool Area Radiation Monitor R-5 Declared Inoperable.Caused by Loose Electrical Connection on Breaker at 120-volt Control Power Panel Supplying Monitor.Connection Tightened.Monitor re-energized (← links)
- 05000348/LER-1981-074-03, /03L-0:on 811115-17,containment Purge & Exhaust Isolation Radiation Monitor (R24A) Removed from Svc for Calibr Twice W/O a Train Containment Purge & Exhaust Valves Closed.Caused by Procedural Inadequacy.Procedures Revised (← links)
- 05000348/LER-1981-073-03, /03L-0:on 811219,determined That FNP-1-STP-292 (Shutdown Margin Calculation) Had Not Been Performed Per Tech Spec Time Interval.Caused by Personnel Error. Performance Completed.Personnel Counseled (← links)
- 05000348/LER-1982-001-01, /01T-0:on 820104,investigation Concluded That Certain Containment Spray Header Nozzles Were Positioned Incorrectly.Caused by Installation Error.Investigation Underway.Meeting W/Nrc Scheduled (← links)
- 05000348/LER-1982-001, Forwards LER 82-001/01T-0 (← links)
- 05000348/LER-1981-071-03, /03L-0:on 811123,fire Barrier Cable Penetration 07-155-31 Declared Inoperable When Determined Penetration Was Not Sealed.Caused by Personnel Failing to Follow Control Procedures (← links)
- 05000348/LER-1981-071, Forwards LER 81-071/03L-0 (← links)
- 05000348/LER-1989-004, :on 890616,determined That Calculations Unavailable to Demonstrate That Svc Water Sys Capable of Maintaining Design Flow to safety-related Loads. Documentation Found Deficient (← links)
- 05000348/LER-1990-003, :on 900315,recognized That Methodology Used to Calculate Setpoints for Liquid Effluent Radioactivity Monitors Incorrect.Caused by Personnel Error.Offsite Dose Calculation Manual Revised (← links)
- 05000348/LER-1981-070-01, /01T-0:on 811028,discovered That Levels in Fire Protection Tanks a & B Fell to Approx 144,560 Gallons as Result of Inadvertent Actuation of Fire Protection Deluge Sys.Cause Undetermined.Returned Levels to Required Limits (← links)
- 05000348/LER-1981-070, Forwards LER 81-070/01T-0 (← links)
- 05000348/LER-1981-069-03, /03L-0:on 810929,charging Pump 1B Determined Electronically Aligned to Bus W/No Available Emergency Power Supply & Declared Inoperable.Caused by Personnel Error When Pump Aligned to Wrong Train.Personnel Trained (← links)
- 05000348/LER-1981-014-03, /03L-0:on 810327,turbine Driven Auxiliary Feedwater Pump Inoperable When Pump Speed Could Not Be Increased Above Min Speed.Caused by Design Wiring Error. Wiring Error Corrected & Pump Returned to Svc (← links)
- 05000348/LER-1981-013-03, /03L-0:on 810327,rod K-14 Declared Inoperable When Failing to Move While Driving Control Bank a Inward.Caused by Connector Problem on CRDM Circuit for Rod.Connector Reassembled & Proper Rod Operation Verified (← links)
- 05000348/LER-1981-068-03, /03L-0:on 810904,low Analyzer Temp Alarm Received from post-LOCA Containment Hydrogen Analyzer B.Caused by Lack of Insulation on Analyzer Temp Switch.Switch Insulated & Alarm Cleared.Personnel Instructed (← links)
- 05000348/LER-1981-068, Forwards LER 81-068/03L-0 (← links)
- 05000348/LER-1981-066-03, /03L-0:on 810912,oxygen Concentration in PCS Exceeded Specs While RCS at 320 F.Caused by Addition of Oxygenated RCS Makeup Water During Sys Cooldown.Temp Reduced to Less than 250 F (← links)
- 05000348/LER-1981-065-03, /03L-0:on 810830,pressure Indicator of Pressurizer Pressure Instrumentation Channel to Hot Shutdown Panel Failed.Caused by Nonlinear Functioning of Pressure Indicator.Indicator Replaced (← links)
- 05000348/LER-1981-064-03, /03L-0:on 810831,level Indicator of Instrumentation Loop for Refueling Water Storage Tank Failed Low.Caused by Freezing of Indicator Pointer at Low Position During Switching of Instrumentation Loop Power Supply (← links)
- 05000348/LER-1981-051-03, /03L-0:on 810728,diesel Generator 1B Declared Inoperable When B1G Sequencer Failed to Meet Time Requirements for Picking Up Step 3.Caused by Faulty Agastat Relay.Relay Replaced (← links)
- 05000348/LER-1981-051, Forwards LER 81-051/03L-0 (← links)
- 05000348/LER-1983-001-03, /03L-0:on 830102,RCS Subcooling Monitor Channel 2 Declared Inoperable Following Receipt of Main Control Board Alarms.Caused by Faulty Printed Circuit Card.Connector Pins on Card Cleaned (← links)
- 05000348/LER-1982-063-03, /03L-0:on 821230,B Train Chlorine Detector Declared Inoperable When Control Room Supply Damper Would Not Close.Caused by Faulty Solenoid Valve.Valve Replaced (← links)
- 05000348/LER-1982-062-03, /03L-0:on 821231,noble Gas Activity Monitor R15 Declared Inoperable.Caused by Blown Fuse.Fuse Replaced & Monitor Returned to Svc (← links)
- 05000348/LER-1982-056-03, /03L-0:on 820927,control Rod Bank D Declared Inoperable When Rods Would Not Move in Manual Control.Caused by Bank Select Relay Sticking,Causing Control Banks B & D to Be Selected Simultaneously.Relay Inspected & Reinstalled (← links)
- 05000348/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000348/LER-1982-051-03, /03L-0:on 820823,1B Control Room Air Conditioner Failed,Rendering B Train Control Room Emergency Air Cleanup Sys Inoperable.Caused by Failed Fan Drive Belts.Belts Replaced & Sys Returned to Svc (← links)
- 05000348/LER-1982-049-03, /03L-0:on 820822,diesel Generator 1-2A Inadvertently Rendered Inoperable.Caused by Unauthorized Replacement of Lube Oil Strainers & Personnel Error. Generator Returned to Svc (← links)
- 05000348/LER-1983-042-03, /03L-0:on 830802,post-LOCA Hydrogen Recombiner 1A Declared Inoperable.Caused by Failure of Temp Indicator.New Indicator Installed & Declared Operable (← links)
- 05000348/LER-1983-038-03, /03L-0:on 830627,during Turbine Driven Auxiliary Feedwater Pump Inservice Test,Pump Failed to Start from Train a Steam Supply & Declared Inoperable.Caused by Valve HV-3226 Failing to Stroke Properly (← links)
- 05000348/LER-1983-027-03, /03L-0:on 830607,during Performance of FNP-1-STP-43.0,train a Penetration Room Filtration Sys Declared Inoperable When Exhaust Fan Damper 3357A Would Not Open.Caused by Comparator Card Failure (← links)
- 05000348/LER-1983-014-03, /03L-0:on 830330,during Surveillance Test of Main Feedwater Pump Turbine 1A,RCS Tavg Decreased Below 541 F. Caused by Overfeeding of Steam Generators Due to Excessive Leak Past Main Feedwater Pump Discharge Valve (← links)
- 05000348/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000348/LER-1983-012-03, /03L-0:on 830402,overtemp-delta Temp Loop 2 Channel II Declared Inoperable When Bistables 422C1-2 Tripped.Caused by Power Supply Failure of Comparator Card. Card Replaced & Loop Calibr (← links)
- 05000348/LER-1983-015-03, /03L-0:on 830328,instrumentation Channel Associated W/Steam Generator 1C Flow Transmitter FT-497 Declared Inoperable Due to Erroneous High Indication.Caused by Obstruction of Low Pressure Sensing Line.Line Cleared (← links)
- 05000348/LER-1990-002, :on 900222,two Cases Found Where Surveillance Testing Procedures Did Not Perform All Tests Required by Tech Specs.Caused by Inadequate Procedural Guidance. Procedures Revised (← links)
- 05000348/LER-1990-001, :on 900213,fire Watch Not Established within Required Time Period Due to Personnel Error.Administrative Procedure FNP-0-SOP-0.4 Revised & Personnel Retrained on Requirements (← links)
- 05000348/LER-1981-067-03, /03L-0:on 810927,during Operability Test,Diesel Generator 2C Declared Inoperable After Tripping Under Load. Caused by High Crankcase Pressure Due to Scored Cylinder Liner 8 W/Faulty O-ring Allowing Water to Enter (← links)
- 05000348/LER-1981-067, Forwards LER 81-067/03L-0 (← links)
- 05000348/LER-1981-059-03, /03L-0:on 810817,diesel Generator 1-2A Declared Inoperable After Failing to Reach Rated Speed & Voltage within Tech Spec Time Limit.Cause Not Determined.Generator Retested & Returned to Svc (← links)
- 05000348/LER-1981-059, Forwards LER 81-059/03L-0 (← links)
- 05000348/LER-1981-063-03, /03L-0:on 810812,power Supply Breaker Was Inadvertently Racked Out Rendering R11 & R12 Inoperable. Caused by Personnel Failing to Recognize Both Inboard & Outboard Pumps Operate Through Same Supply Breaker (← links)
- 05000348/LER-1981-062-03, /03L-0:on 810809,train a Penetration Room Filtration Sys Did Not Operate as Required.Caused by Failure of Dc Controller Card.Card Replaced & Calibr (← links)
- 05000348/LER-1981-061-03, /03L-0:on 810819,diesel Generator 2C Declared Inoperable When Prematurely Removed from Svc for Preventative Maint.Caused by Personnel Tagging Out W/O Final Approval of Operations Personnel (← links)
- 05000348/LER-1981-060-03, /03L-0:on 810812,loop a Temp Average Protection Channel 412D Declared Inoperable When Temp Indicator Failed Low.Caused by Failure of lead-lag Card.Card Replaced & Calibr (← links)
- 05000348/LER-1981-058-03, /03L-0:on 810813,containment Radioactivity Monitoring Sys R11 & R12 Were de-energized.Caused by Failure of 600/208-volt Transformer.Transformer replaced.R11 & R12 re-energized (← links)
- 05000348/LER-1981-056-03, /03L-0:on 810817,supply Breaker for 1A Charging Pump Was Inadvertently Racked Out.Caused by Personnel Tagging Unit 2 Pump 2A Instead of Unit 1 Pump 1A.Personnel Counseled (← links)
- 05000348/LER-1981-057-03, /03L-0:on 810809,average Containment Air Temp Exceeded Tech Spec Limit.Cause Not Stated.Containment Ventilation Sys Realigned & Temp Returned to within Tech Spec Limit on 810809 (← links)
- 05000348/LER-1981-055-03, /03L-0:on 810728,during Review of Monthly Surveillance Schedule,Determined That Surveillance Test FNP-1-STP-227.1B Had Not Been Performed for Apr,May or June. Caused by Error in Scheduling (← links)
- 05000348/LER-1981-054-03, /03L-0:on 810730,instrument Channel N-43 Was Declared Inoperable When High Flux Trip Setpoint Exceeded Acceptance Criteria.Caused by Setpoint Drift.Trip Setpoint Reset (← links)
- 05000348/LER-1981-053-03, /03L-0:on 810728,diesel Generator 1C Tripped Under Load & Declared Inoperable.Caused by Failed O Ring Between Cylinder Liner 11 & Cylinder,Allowing Water to Enter Cylinder & Overflow to Other Cylinders (← links)
- 05000348/LER-1981-053, Forwards LER 81-053/03L-0 (← links)
- 05000348/LER-1981-052-03, /03L-0:on 810724,,instrumentation Loop for Flow Transmitter FT426 Declared Inoperable Due to Low Flow Indication.Caused by Steam Leak at Instrument Line Associated w/FT426.Instrument Line Repaired (← links)
- 05000348/LER-1981-050-03, /03L-0:on 810715,average Containment Air Temp Increased to 12.05 F.Cause Not Stated.Svc Water Flow to Coolers Increased & Temp Returned to Value within Tech Spec Limit (← links)
- 05000348/LER-1981-047-01, /01T-0:on 810721,levels in Fire Protection Tanks a & B Fell to Approx 230,700 Gallons.Caused by Test Regulator Not Placed in Secured Position.Clapper Valve Opened & Deluge Sys Actuated Due to Decrease in Pressure (← links)
- 05000348/LER-1981-047, Forwards LER 81-047/01T-0 (← links)
- 05000348/LER-1981-048, Forwards LER 81-048/03L-0 (← links)
- 05000348/LER-1981-049-03, /03L-0:on 810714,A Train Containment Cooler 1B Was Declared Inoperable When Motor Operated Valve Failed to Open.Caused by Motor Operated Valve Motor Winding Failure. Motor Was Replaced & Containment Cooler Returned to Svc (← links)
- 05000348/LER-1981-049, Forwards LER 81-049/03L-0 (← links)
- 05000348/LER-1981-040-03, /03L-0:on 810529,diesel Generator 1-2A Could Not auto-start Due to Mode Selector Switch Being Placed in Mode 3.Caused by Generator Being Shut Down for Cleaning. Switch Returned to Mode 1 (← links)
- 05000348/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000348/LER-1981-043-03, /03L-0:on 810602,sequencer Associated W/Diesel Generator Failed to Meet Time Requirement for Picking Up Step 2.Caused by Setpoint Drift.Agastat Timer Adjusted & Sequencer Returned to Svc (← links)
- 05000348/LER-1981-042-03, /03L-0:on 810610,pump Supplying Containment Atmosphere Particulate & Gaseous Radioactivity Monitoring Sys Failed to Start.Caused by Filter Paper Not Advancing Due to Paper Drive Malfunction.Drive Mechanism Adjusted (← links)
- 05000348/LER-1981-041-03, /03L-0:on 810606,diesel Generator Found Incapable of Automatically Starting Due to locked-in Low Lube Oil Pressure Alarm.Caused by Inadequate Procedural Guidance. Procedures Revised (← links)
- 05000348/LER-1981-045-03, /03L-0:on 810613,train Svc Water Loop a Declared Inoperable.Caused by Inoperable Emergency Recirculation Valve Due to Blown Control Circuit Fuse.Fuse Replaced,Valve Tested & Loop Returned to Svc on 810613 (← links)
- 05000348/LER-1981-044-03, /03L-0:on 810610,diesel Generator 1C Declared Inoperable During Test FNP-1-STP-28.1.Caused by Overvoltage Condition Due to Damaged Voltage Regulator Circuitry Resulting from Failed Engine Running Relay (← links)
- 05000348/LER-1981-046-03, /03L-0:on 810620,chlorine Detector a Declared Inoperable When Detector Alarmed & Would Not Reset.Caused by Faulty Bulb.Bulb Replaced & Chlorine Detector Returned to Svc (← links)
- 05000348/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000348/LER-1981-007-01, /01T-0:on 810402,mathematical Sign Error Was Found in Load Summation in Turbine Driven Auxiliary Feedwater Pump Nozzle Load Design Analysis.Caused by Designer Error. Seismic Restraint Mod Made (← links)
- 05000348/LER-1981-007, Forwards LER 81-007/01T-0 (← links)
- 05000348/LER-1981-039-03, /03L-0:on 810528,during Testing,Turbine Driven Auxiliary Feedwater Pump Tripped on Overspeed.Cause Unknown.Test Completed.Pump Returned to Svc (← links)
- 05000348/LER-1981-033-03, /03L-0:on 810602,two Boron Injection Flow Paths Were Declared Inoperable.Caused by Operator Closing Both Discharge Valves on Boric Acid Transfer Pumps 1A & 1B.Valve for Pump 1A Opened.Operator Counseled (← links)
- 05000348/LER-1981-038-01, /01T-0:on 810610,levels in Fire Protection Tanks a & B Fell Below Tech Spec.Caused by Inadvertent Actuation of Fire Protection Deluge Sys on Cooling Tower 2B.Levels Restored (← links)
- 05000348/LER-1981-038, Forwards LER 81-038/01T-0 (← links)
- 05000348/LER-1981-035-03, /03L-0:on 810511,containment Isolation Valve CCW-MOV-3052,was Declared Inoperable When Valve Position Indication Was Lost.Caused by Blown Control Power Fuse.Fuse Replaced (← links)
- 05000348/LER-1981-034-03, /03L-0:on 810509,train a Refueling Water Storage Tank Level Indicator Failed Low.Cause Undetermined. Investigation Underway.Problem Has Not Recurred (← links)
- 05000348/LER-1981-030-03, /03L-0:on 810505,B1F Sequencer Failed to Meet Time Requirements for Picking Up Step 6 During Testing. Caused by Agastat Timer Being Out of Adjustment.Timer Setpoint Adjusted (← links)
- 05000348/LER-1981-028-03, /03L-0:on 810423,accumulator 1B Was Declared Inoperable.Caused by Accumulator Being Initially Pressurized Too Close to Alarm Setpoint.Accumulator Vented & Returned to Svc.Personnel Reinstructed (← links)
- 05000348/LER-1981-028, Forwards LER 81-028/03L-0 (← links)
- 05000348/LER-1981-022-03, /03L-0:on 810422,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable.Caused by Defective lead-lag Card.Card Replaced & Channel Returned to Svc (← links)
- 05000348/LER-1981-022, Forwards LER 81-022/03L-0 (← links)
- 05000348/LER-1981-017-03, /03L-0:on 810405,while Performing FNP-1STP-28.2, LOSP BIF Sequencer Failed to Meet Time Requirements for Picking Up Step 6.Caused by Agastat Timer Setpoint for LOSP BIF Sequencer Drifting Below Setpoint.Timer Adjusted (← links)
- 05000348/LER-1981-016-03, /03L-0:on 810405,during Channel Check Surveillance test,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable When Trip Setpoint Failed to Meet Tolerance Requirements.Caused by Defective Nll Card (← links)
- 05000348/LER-1981-015-03, /03L-0:on 810404,during Channel Check Surveillance Test,Feedwater Flow Loop FT-486 Failed to Meet Tolerance Requirements & Declared Inoperable.Caused by Plug Assembly for Root Valve for Transmitter FT-486 Not Opening (← links)
- 05000348/LER-1981-012-03, /03L-0:on 810402,during Testing of Containment 1A Spray Pump,Containment Spray Sys Snubber CS2-Rl31 Declared Inoperable Upon Discovery of Hydraulic Fluid Leakage.Caused by Cracked Reservoir.Reservoir Replaced (← links)
- 05000348/LER-1981-010-03, /03L-0:on 810318,diesel Generator 1B Declared Inoperable Following Trip on Overspeed During Surveillance Test FNP-1-STP-28.2.Caused by Blown Fuses in Speed Governor. Fuses Replaced (← links)
- 05000348/LER-1981-011-03, /03L-0:on 810323,containment Air Lock Declared Inoperable When Air Lock Inner Door Could Not Be Shut. Caused by Personnel Error.Individual Involved Instructed in Proper Method of Operating Air Lock (← links)
- 05000348/LER-1981-011, Forwards LER 81-011/03L-0 (← links)
- 05000348/LER-1981-008-03, /03L-0:on 810313,surveillance Tests for Tech Spec 4.3.3.1 for Radiation Monitors R25 a & B Not Performed within Required Period.Caused by Personnel Not Properly Assessing Conditions for Surveillance.Test Schedule Revised (← links)
- 05000348/LER-1981-008, Forwards LER 81-008/03L-0 (← links)
- 05000348/LER-1981-009-03, /03L-0:on 810317,determined That Diesel Generator 1-2A Had Been Inoperable for 35-minute Period Following Entry Into Mode 4.Caused by Personnel Error.Personnel Instructed in Proper Procedures (← links)
- 05000348/LER-1981-009, Forwards LER 81-009/03L-0 (← links)
- 05000348/LER-1980-062-03, /03L-0:on 801017,diesel Generator Failed to Reach Rated Voltage within Tech Spec Time Limit,Voltage Could Not Be Controlled from Emergency Power Board & B1F Sequencer Step Six Was Below Setpoint.Cause Not Determined (← links)
- 05000348/LER-1980-061-01, /01T-0:on 801104,fire Protection Water Tanks a & B Fell Below Tech Spec Min Level During Flush on Unit 2 Fire Header.Caused by Equipment Operator Being Placed on Emergency Job & Missing Reading.Tanks Refilled (← links)
- 05000348/LER-1989-005-01, :on 890930 & 1001,core Alterations Performed W/O Establishing Containment Refueling Integrity.Caused by Cognitive Personnel Error.Personnel Involved in Event Counseled.Containment Procedure Strengthened (← links)
- 05000348/LER-1981-029-01, /01T-0:on 810515,fire Protection Tanks a & B Fell Below Min Level.Caused by Ruptured Fire Main in Unit 2 Low Voltage Switch Yard.Ruptured Line Repaired (← links)
- 05000348/LER-1981-029, Forwards LER 81-029/01T-0 (← links)
- 05000348/LER-1981-025-03, /03L-0:on 810502,PI457C Instrumentation Loop Declared Inoperable.Caused by Pressurizer Pressure Indicator 457C Being Removed from Svc Due to Faulty Lead/Lag Card. Card Replaced (← links)
- 05000348/LER-1981-025, Forwards LER 81-025/03L-0 (← links)
- 05000348/LER-1980-077-03, /03L-0:on 801128,loop Suction Valve for a Train RHR Closed,Resulting in a Train RHR Being Inoperable.Caused by Dirty Contacts on Circuitry Card for Pressure Transmitter.Card Cleaned (← links)
- 05000348/LER-1980-077, Forwards LER 80-077/03L-0 (← links)
- 05000348/LER-1980-073-01, /01T-0:on 801126,during Insp of Msivs,Damage to Valve Disc Bolt Holes & Disc Arm Bolting on Three Valves Was Revealed.Caused by Design Deficiency & Inadequate Locking Devices on Bolting.Discs Will Be Repaired or Replaced (← links)
- 05000348/LER-1980-038-03, /03L-0:on 800712,bistable Associated W/Pressurizer Pressure Transmitter 457 Failed to Meet Low Pressure Trip Setpoint Requirements & One Pressure Channel Declared Inoperable.Caused by Dirty Electric Contacts (← links)
- 05000348/LER-1980-073, Forwards LER 80-073/01T-0 (← links)
- 05000348/LER-1980-039, Forwards LERs 80-038/03L-0 & LER 80-039/03L-0. LER 80-039/03L-0 Not Encl (← links)
- 05000348/LER-1980-054-01, /01T-0:on 800919,investigation Revealed That During June 1979 Containment Equipment Access Hatch Bolts Had Been Overtorqued.Caused by Technical Manual Error. Technical Manual Specs Changed & Bolts,Nuts & Pins Replaced (← links)
- 05000348/LER-1980-054, Forwards LER 80-054/01T-0 (← links)
- 05000348/LER-1981-037-01, /01T-0:on 810522,Westinghouse Notified Util of Potential Control & Protection Sys Interaction Concern Re Vol Control Tank Level Instrumentation Control.Caused by Inadequate Design/Safety Analysis Review (← links)
- 05000348/LER-1981-037, Forwards LER 81-037/01T-0 (← links)
- 05000348/LER-1981-021-03, /03L-0:on 810413,output Voltage of Diesel Generator 2C Fell to Zero.Caused by Two Blown Voltage Regulator Fuses.Fuses Replaced (← links)
- 05000348/LER-1981-020-03, /03L-0:on 810411,B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Setpoint Drift of Sequencer Agastat Timer.Timer Adjusted (← links)
- 05000348/LER-1981-018-03, /03L-0:on 810413,intermediate Range Channel N-35 Meter Reading Failed to Meet Test Requirements.Caused by Defective Log Current Amplifier Card.Card Replaced (← links)
- 05000348/LER-1981-006-03, /03L-0:on 810319,containment Personnel Air Lock Declared Inoperable During Testing.Caused by Dirty Door Seals.Seals Cleaned (← links)
- 05000348/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000348/LER-1981-004-03, /03L-0:on 810205,fire Barrier Wall in Control Room Ventilation Equipment Room Declared Inoperable Due to Unsealed Penetration.Caused by Failure to Provide Followup to Action Work Request Issued,But Not Accomplished (← links)
- 05000348/LER-1981-004, Forwards LER 81-004/03L-0 (← links)
- 05000348/LER-1980-050-03, /03L-0:on 800825,svc Water Train B Dc Distribution Sys Declared Inoperable When No Output Indication from Battery Charger 4 Was Observed.Caused by Actuation of High Voltage Shutdown Relay.Reset & Returned to Svc (← links)
- 05000348/LER-1980-050, Forwards LER 80-050/03L-0 (← links)