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| 05000335/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000335/LER-1979-001-03, /03L-0 on 790123:2 Control Element Assemblies on Drive Mechanism 43 Stuck 8 Withdrawn When Tripped.Caused by Mechanical Interference or Yoke Misalignment.Motor Housing Removed & Control Element Assembly Freed | /03L-0 on 790123:2 Control Element Assemblies on Drive Mechanism 43 Stuck 8 Withdrawn When Tripped.Caused by Mechanical Interference or Yoke Misalignment.Motor Housing Removed & Control Element Assembly Freed | |
| 05000335/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000335/LER-1979-002-03, /03L-0 on 790128:during Startup,Control Element Assembly 41 Dropped Twice While Being Manually Withdrawn. Cause Unknown.Cea Realigned Both Times & Operated Normally After Second Realignment | /03L-0 on 790128:during Startup,Control Element Assembly 41 Dropped Twice While Being Manually Withdrawn. Cause Unknown.Cea Realigned Both Times & Operated Normally After Second Realignment | |
| 05000335/LER-1979-003, Forwards LER 79-003/01T-0 | Forwards LER 79-003/01T-0 | |
| 05000335/LER-1979-003-01, /01T-0 on 790206:boron Concentration Fell Below Tech Spec Min.Caused by Improper Flushing After Partial Fill Before Startup.Proper Techniques Reemphasized to Personnel | /01T-0 on 790206:boron Concentration Fell Below Tech Spec Min.Caused by Improper Flushing After Partial Fill Before Startup.Proper Techniques Reemphasized to Personnel | |
| 05000335/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000335/LER-1979-004-03, /03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage | /03L-0 on 790205:discovered Two Misalignments in Control Element Assembly.Caused by Faulty Upper Electric Limit Reed Switches.Faulty Switches to Be Replaced During Next Refueling Outage | |
| 05000335/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000335/LER-1979-005-03, /03L-0 on 790208:steam Driven Auxiliary Feedwater Pump 1C Failed to Start.Caused by Tripped Overspeed Trip Mechanism.Reason for Trip Is Unknown | /03L-0 on 790208:steam Driven Auxiliary Feedwater Pump 1C Failed to Start.Caused by Tripped Overspeed Trip Mechanism.Reason for Trip Is Unknown | |
| 05000335/LER-1979-006, Forwards LER 79-006/03L-0 | Forwards LER 79-006/03L-0 | |
| 05000335/LER-1979-006-03, /03L-0 on 790209:control Element Assembly Fell to Core Bottom.Caused by Failed Power Supply Unit.Faulty Unit Replaced | /03L-0 on 790209:control Element Assembly Fell to Core Bottom.Caused by Failed Power Supply Unit.Faulty Unit Replaced | |
| 05000335/LER-1979-007-03, /03L on 790222:while Performing Valve Lineup to Raise Water Level in 1B1 Safety Injection Tank (SIT),low-low Level Alarm Aunuciated for 1B2 Sit.Caused by Leakage of Fill & Drain Valve for 1B2 SIT (V3641) | /03L on 790222:while Performing Valve Lineup to Raise Water Level in 1B1 Safety Injection Tank (SIT),low-low Level Alarm Aunuciated for 1B2 Sit.Caused by Leakage of Fill & Drain Valve for 1B2 SIT (V3641) | |
| 05000335/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000335/LER-1979-008-03, /03L-0 on 790222:during Surveillance Testing of 1B Diesel Generator,Fuel Oil Tank Level Indicator Found Stuck.Afterwards,Actual Tank Level Was 135 Gallons Below Limit.Caused by Stuck Indicator Which Was Repaired | /03L-0 on 790222:during Surveillance Testing of 1B Diesel Generator,Fuel Oil Tank Level Indicator Found Stuck.Afterwards,Actual Tank Level Was 135 Gallons Below Limit.Caused by Stuck Indicator Which Was Repaired | |
| 05000335/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000335/LER-1979-009-03, /03L-0 on 790305:control Element Assembly 2 Would Not Withdraw Fully from Misalignment to Check Control Element Assembly Position Alarms.Caused by Faulty Upper Electric Limit Reed Switch.Switch Will Be Replaced | /03L-0 on 790305:control Element Assembly 2 Would Not Withdraw Fully from Misalignment to Check Control Element Assembly Position Alarms.Caused by Faulty Upper Electric Limit Reed Switch.Switch Will Be Replaced | |
| 05000335/LER-1979-009, Forwards LER 79-009/03L-0 | Forwards LER 79-009/03L-0 | |
| 05000335/LER-1979-010, Forwards LER 79-010/03L-0 | Forwards LER 79-010/03L-0 | |
| 05000335/LER-1979-010-03, /03L-0 on 790311:during Power Operation,Control Element Assembly 62 Slipped Twice.Caused by Faulty 15 Volt Power Supply.Supply Replaced | /03L-0 on 790311:during Power Operation,Control Element Assembly 62 Slipped Twice.Caused by Faulty 15 Volt Power Supply.Supply Replaced | |
| 05000335/LER-1979-011-03, /03L-0 on 790316:during Power Operation, 1C Charging Pump Found to Have Cracked Pump Casing.Caused by Vibration Due to Suction Cavitation on Pumps.Suction Dampening Devices Will Be Installed | /03L-0 on 790316:during Power Operation, 1C Charging Pump Found to Have Cracked Pump Casing.Caused by Vibration Due to Suction Cavitation on Pumps.Suction Dampening Devices Will Be Installed | |
| 05000335/LER-1979-011, Forwards LER 79-011/03L-0 | Forwards LER 79-011/03L-0 | |
| 05000335/LER-1979-012, Forwards LER 79-012/03L-0 | Forwards LER 79-012/03L-0 | |
| 05000335/LER-1979-012-03, /03L-0 on 790316:during Operation,Control Element Assembly Slipped 10 Inches While Selecting Position Readout on Secondary Position Display Backup.Cause Undetermined. Assembly Quickly Returned to Original Position | /03L-0 on 790316:during Operation,Control Element Assembly Slipped 10 Inches While Selecting Position Readout on Secondary Position Display Backup.Cause Undetermined. Assembly Quickly Returned to Original Position | |
| 05000335/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000335/LER-1979-013-03, /03L-0 on 790331:during Surveillance Testing of 1A Diesel generator,solenoid-operated Fill Valve for Engine Mounted Fuel Oil Tank Failed to Open,Causing Tank Level to Drop Below Limit.Caused by Burnt Contacts in Relay | /03L-0 on 790331:during Surveillance Testing of 1A Diesel generator,solenoid-operated Fill Valve for Engine Mounted Fuel Oil Tank Failed to Open,Causing Tank Level to Drop Below Limit.Caused by Burnt Contacts in Relay | |
| 05000335/LER-1979-014, Forwards Revised LER 79-014/09L-1 | Forwards Revised LER 79-014/09L-1 | |
| 05000335/LER-1979-014-03, /03L-0 on 790409:notified by Vendor That Crankshaft Coupling for Cooling Fans Used on Diesels Failed in Other Applications.Couplings Replaced W/Couplings of Improved Design,Under Directions from Diesel Vendor | /03L-0 on 790409:notified by Vendor That Crankshaft Coupling for Cooling Fans Used on Diesels Failed in Other Applications.Couplings Replaced W/Couplings of Improved Design,Under Directions from Diesel Vendor | |
| 05000335/LER-1979-014-09, Diesel Generator Vendor Notified Util of Potential Failure of Crankshaft Coupling for Cooling Fans on Diesel Generators.Cause Unstated. Couplings Replaced W/Couplings of Improved Design | Diesel Generator Vendor Notified Util of Potential Failure of Crankshaft Coupling for Cooling Fans on Diesel Generators.Cause Unstated. Couplings Replaced W/Couplings of Improved Design | |
| 05000335/LER-1979-015-03, /03L-1:on 790507,RCS Boron Concentration Was Below Tech Spec Limit.Caused by Vendor Workers Unknowingly Cutting Steam Generator During Rim Cut Mods.Tubes Plugged & Concentration Restored | /03L-1:on 790507,RCS Boron Concentration Was Below Tech Spec Limit.Caused by Vendor Workers Unknowingly Cutting Steam Generator During Rim Cut Mods.Tubes Plugged & Concentration Restored | |
| 05000335/LER-1979-015, Forwards Updated LER 79-015/03L-1 | Forwards Updated LER 79-015/03L-1 | |
| 05000335/LER-1979-016-01, /01T-0 on 790524:during as-built Verification Insp of Restraints on Component Cooling Water Sys Piping,Four Seismic Restraints Found Installed at Wrong Locations. Caused by Improper Installation During Plant Const | /01T-0 on 790524:during as-built Verification Insp of Restraints on Component Cooling Water Sys Piping,Four Seismic Restraints Found Installed at Wrong Locations. Caused by Improper Installation During Plant Const | |
| 05000335/LER-1979-016, Forwards LER 79-016/01T-0 | Forwards LER 79-016/01T-0 | |
| 05000335/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000335/LER-1979-017-03, /03L-0 on 790509:1B Charging Pump Casing Block Contained Several Internal Cracks Centered Around Pressure Chambers.Caused by Suction Cavitation Resulting in Vibration.Pump Block Replaced | /03L-0 on 790509:1B Charging Pump Casing Block Contained Several Internal Cracks Centered Around Pressure Chambers.Caused by Suction Cavitation Resulting in Vibration.Pump Block Replaced | |
| 05000335/LER-1979-018, Forwards LER 79-018/03L-0 | Forwards LER 79-018/03L-0 | |
| 05000335/LER-1979-018-03, /03L-0 on 790508:during Routine Diesel Generator Maint,Valves Installed on Engine Crankcase Oil Drain Line Prior to Performance of Written Safety Evaluation.Caused by Failure to Follow Procedures | /03L-0 on 790508:during Routine Diesel Generator Maint,Valves Installed on Engine Crankcase Oil Drain Line Prior to Performance of Written Safety Evaluation.Caused by Failure to Follow Procedures | |
| 05000335/LER-1979-019-03, /03L-0 on 790605:control Element Assembly Dropped Four Times within 2-h Period.Caused by Failure of Coil Power Programmer Timing Module.Module Replaced | /03L-0 on 790605:control Element Assembly Dropped Four Times within 2-h Period.Caused by Failure of Coil Power Programmer Timing Module.Module Replaced | |
| 05000335/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000335/LER-1979-020-03, /03L-0 on 790614:auxiliary Feedwater Pump 1c Failed to Start Due to Failure of Steam Inlet Valve.Caused by Unknown Factor.Valve Operated Normally After Being Manually Cycled | /03L-0 on 790614:auxiliary Feedwater Pump 1c Failed to Start Due to Failure of Steam Inlet Valve.Caused by Unknown Factor.Valve Operated Normally After Being Manually Cycled | |
| 05000335/LER-1979-020, Forwards LER 79-020/02L-0 | Forwards LER 79-020/02L-0 | |
| 05000335/LER-1979-021-01, /01T-0 on 790625:General Motors Notified Util That Turbocharger Thrust Bearing Could Be Damaged by Hot Starts W/Lube Oil Over 160 F.Vendor Recommends Eliminating Nonemergency Hot Starts While New Design Is Developed | /01T-0 on 790625:General Motors Notified Util That Turbocharger Thrust Bearing Could Be Damaged by Hot Starts W/Lube Oil Over 160 F.Vendor Recommends Eliminating Nonemergency Hot Starts While New Design Is Developed | |
| 05000335/LER-1979-021, Forwards LER 79-021/01T-0 | Forwards LER 79-021/01T-0 | |
| 05000335/LER-1979-022-03, /03L-0 on 790627:during Periodic Surveillance, Testing Auxiliary Feedwater Pump Failed to Start.Cause Could Not Be Determined.Condensation in Steam Line May Have Delayed Starting Enough to Mislead Operator | /03L-0 on 790627:during Periodic Surveillance, Testing Auxiliary Feedwater Pump Failed to Start.Cause Could Not Be Determined.Condensation in Steam Line May Have Delayed Starting Enough to Mislead Operator | |
| 05000335/LER-1979-022, Forwards LER 79-022/03L-0 | Forwards LER 79-022/03L-0 | |
| 05000335/LER-1979-023-03, /03L-0 on 790702:control Element Assembly 33 Would Not Withdraw Due to Presence of Fullout Position Indication.Caused by Faulty Upper Electric Limit Reed Switch | /03L-0 on 790702:control Element Assembly 33 Would Not Withdraw Due to Presence of Fullout Position Indication.Caused by Faulty Upper Electric Limit Reed Switch | |
| 05000335/LER-1979-023, Forwards LER 79-023/03L-0 | Forwards LER 79-023/03L-0 | |
| 05000335/LER-1979-024-03, /03L-0 on 790705:while Reducing Power,Control Element Assembly 62 Slipped from 134 Inches to 120 Inches. Caused by Faulty Timer Module.Timer Module Replaced & Assembly 62 Performed Normally | /03L-0 on 790705:while Reducing Power,Control Element Assembly 62 Slipped from 134 Inches to 120 Inches. Caused by Faulty Timer Module.Timer Module Replaced & Assembly 62 Performed Normally | |
| 05000335/LER-1979-024, Forwards LER 79-024/03L-0 | Forwards LER 79-024/03L-0 | |
| 05000335/LER-1979-025, Forwards LER 79-025/03L-0 | Forwards LER 79-025/03L-0 | |