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| Issue date | Title | Topic | |
|---|---|---|---|
| 05000348/LER-1990-004 | 27 July 1990 | LER 90-004-00:on 900628,determined That Procedural Inadequacy Caused Improper Surveillance of Accumulators. Sample Purge Time Too Short to Ensure Representative Sample. Procedures revised.W/900727 Ltr | |
| ML20246P822 | 12 July 1989 | LER 89-S02-00:on 890619,determined That Situation Existed That Could Have Allowed Unauthorized or Undetected Entry Into Svc Water Intake Structure.No Barrier Existed on Either End of Line to Prevent Access.Security Posted | |
| 05000364/LER-1984-002, Revised LER 84-002-01:on 840124,hourly Firewatch Patrol in Train B Auxiliary Bldg Battery Charger Room Not Performed at Specified Times.Caused by Personnel Error.Personnel Counseled & Firewatch Patrol Immediately Performed | 27 February 1984 | Revised LER 84-002-01:on 840124,hourly Firewatch Patrol in Train B Auxiliary Bldg Battery Charger Room Not Performed at Specified Times.Caused by Personnel Error.Personnel Counseled & Firewatch Patrol Immediately Performed | |
| 05000364/LER-1983-054, Updated LER 83-054/03X-1:on 831028 & 1103,instrumentation Channel Associated W/Flow Transmitter FT-496 Declared Inoperable Due to Erroneous Indication.Cause unknown.FT-496 Instrumentation Channel Operable on 831029 & 1104 | 13 December 1983 | Updated LER 83-054/03X-1:on 831028 & 1103,instrumentation Channel Associated W/Flow Transmitter FT-496 Declared Inoperable Due to Erroneous Indication.Cause unknown.FT-496 Instrumentation Channel Operable on 831029 & 1104 | |
| 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 | 6 January 1983 | 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 | Grab sample |
| 05000364/LER-1982-047, Corrected LER 82-047/03X-1:on 821124,determined FNP-2-STP-63.0 (Area Temp Monitoring) Not Performing Per Tech Specs.Caused by Personnel Error.Procedure FNP-2-STP-1.0 Revised.Area Temp Monitoring Completed | 28 December 1982 | Corrected LER 82-047/03X-1:on 821124,determined FNP-2-STP-63.0 (Area Temp Monitoring) Not Performing Per Tech Specs.Caused by Personnel Error.Procedure FNP-2-STP-1.0 Revised.Area Temp Monitoring Completed | |
| 05000364/LER-1982-049, Corrected LER 82-049/03L-0:on 821201,containment Atmosphere Activity Monitor R-11 & R-12 Declared Inoperable When Vacuum Pump Tripped Due to Erroneous High Flow Signal. Caused by Defective High Flow Relay.Relay Replaced | 23 December 1982 | Corrected LER 82-049/03L-0:on 821201,containment Atmosphere Activity Monitor R-11 & R-12 Declared Inoperable When Vacuum Pump Tripped Due to Erroneous High Flow Signal. Caused by Defective High Flow Relay.Relay Replaced | |
| 05000364/LER-1982-027, Corrected LER 82-027/03L-0:on 820622,steam Jet Air Ejector Noble Gas Activity Monitor Declared Inoperable When Pegged High While All Other Indications Normal.Caused by Faulty Detector.Detector Replaced & Declared Operable on 82 | 12 July 1982 | Corrected LER 82-027/03L-0:on 820622,steam Jet Air Ejector Noble Gas Activity Monitor Declared Inoperable When Pegged High While All Other Indications Normal.Caused by Faulty Detector.Detector Replaced & Declared Operable on 820622 | |
| 05000364/LER-1982-029, Corrected LER 82-029/03L-0:on 820623,7 River Water Pump Declared Inoperable When Motor Tripped.Caused by Ground Fault on Phase C Power Supply Cable.Defective Cable Replaced & Declared Operable on 820626 | 12 July 1982 | Corrected LER 82-029/03L-0:on 820623,7 River Water Pump Declared Inoperable When Motor Tripped.Caused by Ground Fault on Phase C Power Supply Cable.Defective Cable Replaced & Declared Operable on 820626 | |
| 05000348/LER-1982-031 | 30 June 1982 | LER 82-031/03L-0:on 820531,surveillance Requirement for Radiation Monitor R-60A Not Performed Per Tech Specs.Caused by Personnel Error.Surveillance Performed.Personnel Instructed | |
| 05000348/LER-1982-024 | 30 June 1982 | LER 82-024/03L-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 | |
| 05000348/LER-1982-029 | 30 June 1982 | LER 82-029/03L-0:on 820605,containment Airlock Declared Inoperable When Airlock Outer Door Could Not Be Shut.Caused by Broken Door Shaft.Shaft Repaired | |
| 05000348/LER-1982-028 | 30 June 1982 | LER 82-028/03L-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 | |
| 05000348/LER-1982-023 | 25 June 1982 | LER 82-023/03L-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 | |
| 05000348/LER-1982-027 | 25 June 1982 | LER 82-027/03L-0:on 820526,turbine Driven Auxiliary Feedwater Pump Declared Inoperable When Main Control Board Annunciator Indicated Trip Throttle Valve Closed.Cause Unknown.Valve Reopened | |
| 05000348/LER-1982-025 | 11 June 1982 | LER 82-025/03L-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 | |
| 05000348/LER-1982-022 | 11 June 1982 | LER 82-022/03L-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 | |
| 05000348/LER-1982-019 | 2 June 1982 | LER 82-019/03L-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 | |
| 05000348/LER-1982-020 | 2 June 1982 | LER 82-020/03L-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 | |
| 05000364/LER-1982-019 | 27 May 1982 | LER 82-019/03L-0:on 820430,pressurizer Pressure Fell Below Tech Spec Limit.Caused by Transient in Pressurizer Pressure Transmitter PT-444 Opening Spray Valve.Pressure Restored | |
| 05000364/LER-1982-017 | 27 May 1982 | LER 82-017/03L-0:on 820427,during Full Length Control Rod Operability test,FNP-2-STP-5.0 Group 1 & Control Banks a, Group 1 & B,Group 1 Control Rods Declared Inoperable.Caused by Faulty Slave Cycler Counter Card.Card Replaced | |
| 05000348/LER-1982-012 | 2 April 1982 | LER 82-012/03L-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 | |
| 05000348/LER-1982-011 | 2 April 1982 | LER 82-011/03L-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 | |
| 05000348/LER-1982-010 | 2 April 1982 | LER 82-010/03L-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 | Packing leak |
| 05000348/LER-1982-009 | 2 April 1982 | LER 82-009/03L-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 | |
| 05000348/LER-1982-008 | 2 April 1982 | LER 82-008/03L-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 | |
| 05000348/LER-1982-007 | 2 April 1982 | LER 82-007/03L-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 | |
| ML20064H887 | 22 December 1978 | /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 | |
| ML20064H933 | 21 December 1978 | /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 | |
| ML20064H919 | 21 December 1978 | /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 | |
| ML20064H928 | 20 December 1978 | /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 | |
| ML20064H411 | 15 December 1978 | /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 | |
| ML20064G377 | 4 December 1978 | /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 | |
| ML20064F611 | 27 November 1978 | /01T-0 on 781114:water Levels in Fire Protec Sys Water Storage Tanks Were Approx 135,000 Gallons Less than Prescribed Minimum,Due to Constr Personnel Diverting Water to Unit 2 Condenser for Hydrostatic Test | Hydrostatic |
| ML20064F125 | 22 November 1978 | /03L-0 on 781025:B Train Penetration Room Filtration Sys Inoperable.Caused by Low Spring Tension on Filter Support Assembly | |
| ML20064F279 | 20 November 1978 | /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 | |
| ML20064F274 | 20 November 1978 | /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 | |
| ML20064F271 | 20 November 1978 | /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 | |
| ML20064E725 | 13 November 1978 | /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 | |
| ML20064D824 | 2 November 1978 | /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 | Time of Discovery |
| ML20064D817 | 2 November 1978 | /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 | |
| ML20064D809 | 2 November 1978 | /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 | |
| ML20064D805 | 2 November 1978 | /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 Relay | |
| ML20147B363 | 2 October 1978 | /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 | |
| ML20147B318 | 2 October 1978 | /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 |