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| 05000348/LER-1978-018-03, Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented | Diesel Generator IC Failed to Start.Caused by Solenoid Valves Sticking Due to Corrosion Particles.Air Start Solenoid Valves Cleaned & Tested.Design Change Implemented | |
| 05000348/LER-1978-024-03, /03L-1 on 780408:while Changing Turbine Governor Valve Control,Load Rejection of Approx 170 MW Resulted in Momentary Temp Average Increase.Control Rods Automatically Initiated & Average Reduced | /03L-1 on 780408:while Changing Turbine Governor Valve Control,Load Rejection of Approx 170 MW Resulted in Momentary Temp Average Increase.Control Rods Automatically Initiated & Average Reduced | |
| 05000348/LER-1978-024, Forwards Updated LER 78-024/03L-1 | Forwards Updated LER 78-024/03L-1 | |
| 05000348/LER-1978-037-03, Vacuum Pump Kept Tripping on Low Flow.Cause Not Stated.Vacuum Pump Replaced.Flow Trip Setpoint Not Adjusted.Design Change to Add Second Pump in Parallel Has Been Implemented | Vacuum Pump Kept Tripping on Low Flow.Cause Not Stated.Vacuum Pump Replaced.Flow Trip Setpoint Not Adjusted.Design Change to Add Second Pump in Parallel Has Been Implemented | |
| 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 | /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 | |
| 05000348/LER-1978-043, Forwards LER 78-043/03L-0 | Forwards LER 78-043/03L-0 | |
| 05000348/LER-1978-043-03, /03L-0 on 780624:FNP-O-STP-12.0 Had Not Been Performed Between 780611-24.Caused by Incorrect Scheduling. Personnel Notified & Surveillance Schedule Reviewed | /03L-0 on 780624:FNP-O-STP-12.0 Had Not Been Performed Between 780611-24.Caused by Incorrect Scheduling. Personnel Notified & Surveillance Schedule Reviewed | |
| 05000348/LER-1978-059-03, /03L-0 on 780830:during Rapid Load Reduction from 100% Power,Tavg Exceeded Tech Spec Limits.Caused by Attempt to Maintain Axial Flux Differential within Target Band. Control Rods Driven in | /03L-0 on 780830:during Rapid Load Reduction from 100% Power,Tavg Exceeded Tech Spec Limits.Caused by Attempt to Maintain Axial Flux Differential within Target Band. Control Rods Driven in | |
| 05000348/LER-1978-060-03, /03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced | /03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced | |
| 05000348/LER-1978-061, Forwards LER 78-061/03L-0 | Forwards LER 78-061/03L-0 | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-063, Forwards LER 78-063/03L-0 | Forwards LER 78-063/03L-0 | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-064, Forwards LER 78-064/03L-0 | Forwards LER 78-064/03L-0 | |
| 05000348/LER-1978-065, Forwards LER 78-065/03L-0 | Forwards LER 78-065/03L-0 | |
| 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 | /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 | |
| 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 | /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 | |
| 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 | /03L-0:on 780917,during Change from Hot to Cold Shutdown,Both Containment Spray Pumps Tagged Out.Caused by Defective Procedure | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-071, Forwards LER 78-071/03L-0, 78-072/03L-0,78-064/03X-1 & 78-066/03X-1 | Forwards LER 78-071/03L-0, 78-072/03L-0,78-064/03X-1 & 78-066/03X-1 | |
| 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 | /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 | |
| 05000348/LER-1978-073-03, /03L-0 on 781009:Instru Air to Containment Iso Valve Was Declared Inoper When Valve Was Blocked Open to Allow Repair of Control Air Supply Regulator Valve Actuator. Regulator Replaced & Valve Stem Reconnected | /03L-0 on 781009:Instru Air to Containment Iso Valve Was Declared Inoper When Valve Was Blocked Open to Allow Repair of Control Air Supply Regulator Valve Actuator. Regulator Replaced & Valve Stem Reconnected | |
| 05000348/LER-1978-073, Forwards LER 78-073/03L-0,78-074/03L-0,78-075/03L-0, 78-076/03L & 78-077/03L-0 | Forwards LER 78-073/03L-0,78-074/03L-0,78-075/03L-0, 78-076/03L & 78-077/03L-0 | |
| 05000348/LER-1978-074-03, /03L-0:on 780917,during test,1A Motor Driven Aux Feed Pump Failed to auto-start Due to B1F Sequencer Failure. Caused by 205F Agastat Relay Time Delay Setpoint Which Had Drifted.Setpoint Was Adjusted & Retest Performed | /03L-0:on 780917,during test,1A Motor Driven Aux Feed Pump Failed to auto-start Due to B1F Sequencer Failure. Caused by 205F Agastat Relay Time Delay Setpoint Which Had Drifted.Setpoint Was Adjusted & Retest Performed | |
| 05000348/LER-1978-075-03, /03L-0:on 781010,review of Data Acquired During Response Time Testing Indicated Possible Faulty Component in 1-2A D/G Output Breaker Control Circuit,Causing Delay in Closure.Fuse on 125 V DC Supply Was Blown.Fuse Replaced | /03L-0:on 781010,review of Data Acquired During Response Time Testing Indicated Possible Faulty Component in 1-2A D/G Output Breaker Control Circuit,Causing Delay in Closure.Fuse on 125 V DC Supply Was Blown.Fuse Replaced | |
| 05000348/LER-1978-076-03, /03L-0;on 781011,during Operational check,1B Diesel Generator Was Started.B Air Start Sloenoid Valve Stuck Open,Bleeding B Air Receiver Down to 10psig.Valve Disassembled & Parts Cleaned.Unit re-tested | /03L-0;on 781011,during Operational check,1B Diesel Generator Was Started.B Air Start Sloenoid Valve Stuck Open,Bleeding B Air Receiver Down to 10psig.Valve Disassembled & Parts Cleaned.Unit re-tested | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-078, Forwards LER 78-078/03L-0 | Forwards LER 78-078/03L-0 | |
| 05000348/LER-1978-079, Forwards LER 78-079/01T-0 | Forwards LER 78-079/01T-0 | |
| 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 | /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 | |
| 05000348/LER-1978-080, Forwards LER 78-080/03L-0, 78-081/03L-0 & 78-038/03X-1 | Forwards LER 78-080/03L-0, 78-081/03L-0 & 78-038/03X-1 | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-082, Forwards LER 78-082/03L-0 | Forwards LER 78-082/03L-0 | |
| 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 | /03L-0 on 781025:B Train Penetration Room Filtration Sys Inoperable.Caused by Low Spring Tension on Filter Support Assembly | |
| 05000348/LER-1978-083, Forwards LER 78-083/03L-0 | Forwards LER 78-083/03L-0 | |
| 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 | /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 | |
| 05000348/LER-1978-084, Forwards LER 78-084/03L-0 | Forwards LER 78-084/03L-0 | |
| 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 | /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 | |
| 05000348/LER-1978-085, Forwards LER 78-085/03L-0 | Forwards LER 78-085/03L-0 | |
| 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 | /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 | |
| 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 | /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 | |
| 05000348/LER-1978-086, Forwards LER 78-086/03L-0 & 78-087/03L-0 | Forwards LER 78-086/03L-0 & 78-087/03L-0 | |
| 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 | /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 | |
| 05000348/LER-1978-088, Forwards LER 78-088/03L-0 | Forwards LER 78-088/03L-0 | |
| 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 | /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 | |