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| 05000336/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000336/LER-1979-001-03, /03L-0 on 790105:during Normal Operation,Failure of Inverter 4 Interrupted 120V Vital AC Power to Channel D Components.Inverter Malfunction Caused by Failure of Several Capacitors (C1) & Oscillator Board (SC1-PL-1163) | /03L-0 on 790105:during Normal Operation,Failure of Inverter 4 Interrupted 120V Vital AC Power to Channel D Components.Inverter Malfunction Caused by Failure of Several Capacitors (C1) & Oscillator Board (SC1-PL-1163) | |
| 05000245/LER-1979-001-01, /01T-0 on 790106:circumferential Crack Found in Heat Affected Zone of Weld Clean Up Sys Return Line.Caused by Intergranular Stress Corrosion Cracking Accelerated by Mechanical & Thermal Stresses | /01T-0 on 790106:circumferential Crack Found in Heat Affected Zone of Weld Clean Up Sys Return Line.Caused by Intergranular Stress Corrosion Cracking Accelerated by Mechanical & Thermal Stresses | |
| 05000245/LER-1979-001, Forwards LER 79-001/01T-0 | Forwards LER 79-001/01T-0 | |
| 05000245/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000245/LER-1979-002-03, /03L-0 on 790107:reactor Low Water Level Signal Resulted from Failure of a Standby Gas Treatment Sys. Caused by Misalignment of Movable Contact Cover on Relay That Starts a Standby Gas Treatment Sys | /03L-0 on 790107:reactor Low Water Level Signal Resulted from Failure of a Standby Gas Treatment Sys. Caused by Misalignment of Movable Contact Cover on Relay That Starts a Standby Gas Treatment Sys | |
| 05000336/LER-1979-002-03, /03L-0 on 790116:following Return to sub-critical Conditions,Investigations Showed Faulty Position Indication for Control Element Assembly 63,indicating About 6 Steps High.Caused by Position Indication Unit Drift | /03L-0 on 790116:following Return to sub-critical Conditions,Investigations Showed Faulty Position Indication for Control Element Assembly 63,indicating About 6 Steps High.Caused by Position Indication Unit Drift | |
| 05000336/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000245/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000245/LER-1979-003-03, /03L-0 on 790108:one of Four Pressure Switches Responsible for Initiation of Group 1 Isolation Tripped Outside Tech Spec Limits.Caused by Instrument Drift | /03L-0 on 790108:one of Four Pressure Switches Responsible for Initiation of Group 1 Isolation Tripped Outside Tech Spec Limits.Caused by Instrument Drift | |
| 05000336/LER-1979-003-03, /03L-0 on 790216:control Element Assembly 68 Dropped to Zero Steps,Resulting in Control Element Assembly Misalignment & Tilt to Max .029.No Component Failures. Control Element Assembly Recovered | /03L-0 on 790216:control Element Assembly 68 Dropped to Zero Steps,Resulting in Control Element Assembly Misalignment & Tilt to Max .029.No Component Failures. Control Element Assembly Recovered | |
| 05000336/LER-1979-003, Forwards LER 79-003/03L-0 | Forwards LER 79-003/03L-0 | |
| 05000245/LER-1979-004, Submits Addl Info to LER 79-04/03L.Control Rod 22-07 Declared Inoperable on 790125.Many Fragments of Broken Source Holder Were Retrieved.All Fragments Have Been Removed | Submits Addl Info to LER 79-04/03L.Control Rod 22-07 Declared Inoperable on 790125.Many Fragments of Broken Source Holder Were Retrieved.All Fragments Have Been Removed | |
| 05000336/LER-1979-004-03, /03L-0 on 790130:reactor Protection Sys Reactor Coolant Loop Tests Exceeded Tech Spec Response Time.Cause Unknown.Resistance Temp Detector Will Be Replaced During Spring 1979 Outage | /03L-0 on 790130:reactor Protection Sys Reactor Coolant Loop Tests Exceeded Tech Spec Response Time.Cause Unknown.Resistance Temp Detector Will Be Replaced During Spring 1979 Outage | |
| 05000336/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000245/LER-1979-004-03, /03L-0 on 790125:during Routine Stuck Control Rod Surveillance,Control Rod 22-07 Stuck.Cause Unknown;Collet Cracking Ruled Out as Cause.Will Investigate During Upcoming Refueling Outage | /03L-0 on 790125:during Routine Stuck Control Rod Surveillance,Control Rod 22-07 Stuck.Cause Unknown;Collet Cracking Ruled Out as Cause.Will Investigate During Upcoming Refueling Outage | |
| 05000336/LER-1979-005-03, /03L-0 on 790218:malfunction in Computer Resulted in Control Element Assembly Pulse Counting Position Being Inoperable.Cause Traced to Circuit Card in Computer Memory; No Fault Discerned.Card Contacts Cleaned | /03L-0 on 790218:malfunction in Computer Resulted in Control Element Assembly Pulse Counting Position Being Inoperable.Cause Traced to Circuit Card in Computer Memory; No Fault Discerned.Card Contacts Cleaned | |
| 05000336/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000245/LER-1979-006, Forwards LER 79-006/03L-0 | Forwards LER 79-006/03L-0 | |
| 05000245/LER-1979-006-03, /03L-0 on 790201:unit Operated in Degraded Mode Due to Deficient Control Rods.Caused by Personnel Oversight. Rods Were Made Operable & Tech Spec Change Submitted | /03L-0 on 790201:unit Operated in Degraded Mode Due to Deficient Control Rods.Caused by Personnel Oversight. Rods Were Made Operable & Tech Spec Change Submitted | |
| 05000336/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000336/LER-1979-007-03, /03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr | /03L-0 on 790228:both Control Room Chlorine Detection Sys Declared Inoperable.Caused by Improper Calibr of Detectors Due to Use of Inaccurate Calibr Gas.Sys Returned to Svc After Recalibr | |
| 05000245/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000245/LER-1979-007-03, /03L-0 on 790214:gas Turbine Failed to Complete Starting Sequence While Conducting Fast Start.Caused by Potential Malfunction in Speed Switch.Switches Will Be Replaced During Next Refueling Outage | /03L-0 on 790214:gas Turbine Failed to Complete Starting Sequence While Conducting Fast Start.Caused by Potential Malfunction in Speed Switch.Switches Will Be Replaced During Next Refueling Outage | |
| 05000336/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000336/LER-1979-008-03, /03L-0 on 790314:while Steam Generator Eddy Current Testing in Progress,Loss of Structural Design Criteria Experienced.Caused by RCS Draining Down to Low Levels in Hot Leg.Procedures Changed to Ensure Suction | /03L-0 on 790314:while Steam Generator Eddy Current Testing in Progress,Loss of Structural Design Criteria Experienced.Caused by RCS Draining Down to Low Levels in Hot Leg.Procedures Changed to Ensure Suction | |
| 05000245/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000245/LER-1979-008-03, /03L-0 on 790214:isolation Condenser Inboard Steam Supply Valve Lost Position Indicator,Making Condenser Inoperable.Caused by Fractured Gear Casing on Valve Operator.Operator Removed,Rebuilt,Reinstalled & Tested | /03L-0 on 790214:isolation Condenser Inboard Steam Supply Valve Lost Position Indicator,Making Condenser Inoperable.Caused by Fractured Gear Casing on Valve Operator.Operator Removed,Rebuilt,Reinstalled & Tested | |
| 05000245/LER-1979-009, Forwards LER 79-009/03L-0 | Forwards LER 79-009/03L-0 | |
| 05000245/LER-1979-009-03, /03L-0 on 790222:operability of Safety Relief Bellow Monitor Valve (1-MS-3A) Could Not Be Verified.Caused by Crack in Fitting Connecting Bellows Air Tubing to Valve Bonnet Cap.Fitting Replaced | /03L-0 on 790222:operability of Safety Relief Bellow Monitor Valve (1-MS-3A) Could Not Be Verified.Caused by Crack in Fitting Connecting Bellows Air Tubing to Valve Bonnet Cap.Fitting Replaced | |
| 05000336/LER-1979-011-03, /03L-0 on 790514:one Electrical Penetration & Several Boundary Valves Had Leakage.Caused by Inadevertent Omission of pre-repair Leak Rate Measurement for Some Valves.Test Procedures to Be Revised | /03L-0 on 790514:one Electrical Penetration & Several Boundary Valves Had Leakage.Caused by Inadevertent Omission of pre-repair Leak Rate Measurement for Some Valves.Test Procedures to Be Revised | |
| 05000336/LER-1979-012, Forwards LER 79-012/01T-0 | Forwards LER 79-012/01T-0 | |
| 05000336/LER-1979-012-01, /01T-0 on 790522:during Rise to 30% Power,Two of Four Linear Power Range Channels Found to Be Inoperable. Open Connections Found Between Detector Cables & Field Wiring.Caused by Connector Pins Pushed Into Connector | /01T-0 on 790522:during Rise to 30% Power,Two of Four Linear Power Range Channels Found to Be Inoperable. Open Connections Found Between Detector Cables & Field Wiring.Caused by Connector Pins Pushed Into Connector | |
| 05000245/LER-1979-013, Forwards LER 79-013/03L-0 | Forwards LER 79-013/03L-0 | |
| 05000245/LER-1979-013-03, /03L-0 on 790508:oxygen Pressure 603.5 Check for Source Range Monitors Not Completed for 24-h Period. Surveillance Overlooked.Checklist Added to Indicate Requirement of Procedure | /03L-0 on 790508:oxygen Pressure 603.5 Check for Source Range Monitors Not Completed for 24-h Period. Surveillance Overlooked.Checklist Added to Indicate Requirement of Procedure | |
| 05000336/LER-1979-013-03, /03L-0 on 790525:during Check of Control Room Chlorine Detection Sys,Both Detectors Declared Inoperable Due to Low Drip Rates in Sensor.Caused by Clogged Dispensers.Dispensers Cleaned,Restoring Operability | /03L-0 on 790525:during Check of Control Room Chlorine Detection Sys,Both Detectors Declared Inoperable Due to Low Drip Rates in Sensor.Caused by Clogged Dispensers.Dispensers Cleaned,Restoring Operability | |
| 05000336/LER-1979-013, Forwards LER-79-013/03L-0 | Forwards LER-79-013/03L-0 | |
| 05000336/LER-1979-014-03, /03X-2:on 790604,during Routine Operations,Small Crack Discovered in Charging Pump Body C.Caused by Stress of Fatigue Failure in Valve Block.Three Charging Pumps Replaced W/Gaulin Pumps | /03X-2:on 790604,during Routine Operations,Small Crack Discovered in Charging Pump Body C.Caused by Stress of Fatigue Failure in Valve Block.Three Charging Pumps Replaced W/Gaulin Pumps | |
| 05000245/LER-1979-014, Forwards LER 79-014/03L-0 | Forwards LER 79-014/03L-0 | |
| 05000245/LER-1979-014-03, /03L-0 on 790511:during Audit of Refuel Outage Surveillances,Source Range Monitor Functional Surveillance Was Inadvertently Overlooked.Caused by Failure of Monitor Functional to Be Listed in Refueling Checklist | /03L-0 on 790511:during Audit of Refuel Outage Surveillances,Source Range Monitor Functional Surveillance Was Inadvertently Overlooked.Caused by Failure of Monitor Functional to Be Listed in Refueling Checklist | |
| 05000336/LER-1979-014, Forwards LER 79-014/03X-2 | Forwards LER 79-014/03X-2 | |
| 05000336/LER-1979-015-03, /03L-0 on 790610:leak Identified in RCS & Traced to Isolation Valve.Cause Unknown.Isolation Valve Repaired & power-operated Relief Valve Declared Operable | /03L-0 on 790610:leak Identified in RCS & Traced to Isolation Valve.Cause Unknown.Isolation Valve Repaired & power-operated Relief Valve Declared Operable | |
| 05000336/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000245/LER-1979-015-03, /03L-0 on 790528:during Refueling,No Control Rod out-block Occurred When Refuel Bridge Was Over Core W/Fuel Assembly Loaded Grapple.Caused by Worn Track Limit Switch. Switch Replaced & Surveillance Procedure Changed | /03L-0 on 790528:during Refueling,No Control Rod out-block Occurred When Refuel Bridge Was Over Core W/Fuel Assembly Loaded Grapple.Caused by Worn Track Limit Switch. Switch Replaced & Surveillance Procedure Changed | |
| 05000245/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000245/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000336/LER-1979-016-03, /03L-0 on 790611:pressurizer Pressure Channel for One of Two power-operated Pressurizer Relief Valves Found to Be Reading 250 PSI Lower than Actual Pressure.Caused by Shift at Zero Point.Zero Point Readjusted | /03L-0 on 790611:pressurizer Pressure Channel for One of Two power-operated Pressurizer Relief Valves Found to Be Reading 250 PSI Lower than Actual Pressure.Caused by Shift at Zero Point.Zero Point Readjusted | |
| 05000336/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000245/LER-1979-016-03, /03L-0 on 790530:pressure Switches 263-52A, 263-52C,263-54A & 263-54B Tripped Outside Allowable Band. Caused by Setpoint Drift.Switches Reset within Required Range & Tested | /03L-0 on 790530:pressure Switches 263-52A, 263-52C,263-54A & 263-54B Tripped Outside Allowable Band. Caused by Setpoint Drift.Switches Reset within Required Range & Tested | |
| 05000245/LER-1979-017-03, /03L-0 on 790602:steam Tunnel Switch Tripped at Setpoint Higher than Specified in Tech Specs.Caused by Setpoint Drift.Switch Adjusted & Tested Satisfactorily | /03L-0 on 790602:steam Tunnel Switch Tripped at Setpoint Higher than Specified in Tech Specs.Caused by Setpoint Drift.Switch Adjusted & Tested Satisfactorily | |
