| | | Reporting criterion |
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| 05000317/LER-1979-001-01, /01X-0 on 790209:during Normal Operation, Determined That License Submittal for Operation at 2,700 Mwt Failed to Indicate That Credit for One Charging Pump Was Taken in Small Break LOCA Analysis.Cause Forthcoming | /01X-0 on 790209:during Normal Operation, Determined That License Submittal for Operation at 2,700 Mwt Failed to Indicate That Credit for One Charging Pump Was Taken in Small Break LOCA Analysis.Cause Forthcoming | |
| 05000318/LER-1979-001-03, /03L-0 on 790106:excessive Reactor Coolant Sys Unidentified Leakage.Caused by Cracked Weld on Socket Weld Downstream of Second Isolation Valve.Study Planned to Propose Design Changes to Correct Fatigue Problem | /03L-0 on 790106:excessive Reactor Coolant Sys Unidentified Leakage.Caused by Cracked Weld on Socket Weld Downstream of Second Isolation Valve.Study Planned to Propose Design Changes to Correct Fatigue Problem | |
| 05000318/LER-1979-001, Forwards LER 79-001/03L-0 | Forwards LER 79-001/03L-0 | |
| 05000317/LER-1979-001, Forwards LER 79-001/01T-0 | Forwards LER 79-001/01T-0 | |
| 05000317/LER-1979-002-03, /03L-0 on 790208:plant Computer Failed,Causing Loss of Control Element Assembly Pulse Counting Circuit Indication;Failed Again on 790212.Caused by Problem W/Power Supply Connections | /03L-0 on 790208:plant Computer Failed,Causing Loss of Control Element Assembly Pulse Counting Circuit Indication;Failed Again on 790212.Caused by Problem W/Power Supply Connections | |
| 05000317/LER-1979-002, Forwards LER 79-002/03L-0 | Forwards LER 79-002/03L-0 | |
| 05000318/LER-1979-003-01, /01T-0 on 790120:during Normal operation,22A Lower Seal Temp Alarm Was Received & RCS Leak Rate Increased. Caused by Cracked Weld on 22A Lower Seal Pressure Sensing Line.Design Change Is in Progress | /01T-0 on 790120:during Normal operation,22A Lower Seal Temp Alarm Was Received & RCS Leak Rate Increased. Caused by Cracked Weld on 22A Lower Seal Pressure Sensing Line.Design Change Is in Progress | |
| 05000318/LER-1979-003, Forwards LER 79-003/01T-0 | Forwards LER 79-003/01T-0 | |
| 05000317/LER-1979-003-03, /03L-0 on 790218:control Element Assembly 44 Cropped to Bottom of Core & Could Not Be Withdrawn.Reactor Power Reduced to Below 70%.Caused by Loose Connection on Terminal 21 of Coil Power Programmer.Connection Tightened | /03L-0 on 790218:control Element Assembly 44 Cropped to Bottom of Core & Could Not Be Withdrawn.Reactor Power Reduced to Below 70%.Caused by Loose Connection on Terminal 21 of Coil Power Programmer.Connection Tightened | |
| 05000317/LER-1979-003, /03L-0 on 790218:azimuthal Power Tilt Exceeded Tech Spec Max.Caused by Dropped Control Element Assembly. Corrective Action Detailed in LER 79-003/03L-0 Unit 1 | /03L-0 on 790218:azimuthal Power Tilt Exceeded Tech Spec Max.Caused by Dropped Control Element Assembly. Corrective Action Detailed in LER 79-003/03L-0 Unit 1 | |
| 05000318/LER-1979-004-03, /03L-0 on 790127:during Routine Startup of Auxiliary Feedpump,Throttle Valve Would Not Reset.Caused by Disengagement of Traveling Nut Thread During Operation of Valve | /03L-0 on 790127:during Routine Startup of Auxiliary Feedpump,Throttle Valve Would Not Reset.Caused by Disengagement of Traveling Nut Thread During Operation of Valve | |
| 05000317/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000317/LER-1979-004-03, /03L-0 on 790216:saltwater Pump Discharge Check Valve Failed to Open When Started.Caused by Foreign Debris Lodged Against Disc.Valve Will Be Monitored Closely During Future Operation to Ensure Problem Is Eliminated | /03L-0 on 790216:saltwater Pump Discharge Check Valve Failed to Open When Started.Caused by Foreign Debris Lodged Against Disc.Valve Will Be Monitored Closely During Future Operation to Ensure Problem Is Eliminated | |
| 05000318/LER-1979-004, Forwards LER 79-004/03L-0 | Forwards LER 79-004/03L-0 | |
| 05000318/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000318/LER-1979-005-03, /03L-0 on 790129:during Operation,Flow Transmitter Output Was Found Pegged High & Was Bypassed.Caused by Packing Leak in Transmitter Equalizing & Reference Leg Isolation Valves | /03L-0 on 790129:during Operation,Flow Transmitter Output Was Found Pegged High & Was Bypassed.Caused by Packing Leak in Transmitter Equalizing & Reference Leg Isolation Valves | |
| 05000317/LER-1979-005, Forwards LER 79-005/03L-0 | Forwards LER 79-005/03L-0 | |
| 05000317/LER-1979-006, Forwards LER 79-006/03L-0 | Forwards LER 79-006/03L-0 | |
| 05000317/LER-1979-006-03, /03L-0 on 790304:reactor Coolant Sys Leakoff Plug CVC-515-CV Was Leaking.Caused by Natural End Life of Valve Packing.Packing Adjusted & Leakoff Line Capped | /03L-0 on 790304:reactor Coolant Sys Leakoff Plug CVC-515-CV Was Leaking.Caused by Natural End Life of Valve Packing.Packing Adjusted & Leakoff Line Capped | |
| 05000318/LER-1979-006-03, /03L-0 on 790204:control Element Assembly Motion Inhibit Failed to Actuate within Tech Spec Limits.Caused by Bad K2 Relay on Relay Card.Relay Replaced & Inhibit Returned to Svc | /03L-0 on 790204:control Element Assembly Motion Inhibit Failed to Actuate within Tech Spec Limits.Caused by Bad K2 Relay on Relay Card.Relay Replaced & Inhibit Returned to Svc | |
| 05000318/LER-1979-006, Forwards LER 79-006/03L-0 | Forwards LER 79-006/03L-0 | |
| 05000317/LER-1979-007-04, /04T-0 on 790228:sulfuric Acid Was Discharged Onto Ground Via Storm Drains Near Storage Tank.Caused by Pipe Weld Failure.Spill Isolated & Contained,Leak Located & Welded | /04T-0 on 790228:sulfuric Acid Was Discharged Onto Ground Via Storm Drains Near Storage Tank.Caused by Pipe Weld Failure.Spill Isolated & Contained,Leak Located & Welded | |
| 05000317/LER-1979-007, Forwards LER 79-007/04T-0 | Forwards LER 79-007/04T-0 | |
| 05000318/LER-1979-007-03, /03L-0 on 790212:snubber 2-83B-2,21 Main Steam Isolation Valve Hydraulic Supply Sys,Inoperable.Caused by Slightly Bent Piston Rod.Snubber Replaced | /03L-0 on 790212:snubber 2-83B-2,21 Main Steam Isolation Valve Hydraulic Supply Sys,Inoperable.Caused by Slightly Bent Piston Rod.Snubber Replaced | |
| 05000318/LER-1979-007, Forwards LER 79-007/03L-0 | Forwards LER 79-007/03L-0 | |
| 05000318/LER-1979-008-03, /03L-0 on 790208:22B Safety Injection Tank Level & Pressure Were Below Tech Spec Min Due to Fill Valve Not Shutting Tightly After Being Opened for Drainage.Tank Refilled & Valve Successfully Cycled Several Times | /03L-0 on 790208:22B Safety Injection Tank Level & Pressure Were Below Tech Spec Min Due to Fill Valve Not Shutting Tightly After Being Opened for Drainage.Tank Refilled & Valve Successfully Cycled Several Times | |
| 05000318/LER-1979-008, Forwards LER 79-008/03L-0 | Forwards LER 79-008/03L-0 | |
| 05000318/LER-1979-009, Forwards LER 79-009/03L-0 | Forwards LER 79-009/03L-0 | |
| 05000318/LER-1979-009-03, /03L-0 on 790226:svc Water Heat Exchanger Saltwater Outlet Throttle Valve 21 Failed to Open on Signal.Cause Unknown.Valve Will Be Repaired During Next Outage | /03L-0 on 790226:svc Water Heat Exchanger Saltwater Outlet Throttle Valve 21 Failed to Open on Signal.Cause Unknown.Valve Will Be Repaired During Next Outage | |
| 05000317/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000317/LER-1979-015-03, /03L-0 on 790507:low Pressure Safety Injection Pump Stopped for 15 Minutes Due to Spurious Recirculation Actuation Signal.Caused by Voltage Transient.Test Procedures Revised | /03L-0 on 790507:low Pressure Safety Injection Pump Stopped for 15 Minutes Due to Spurious Recirculation Actuation Signal.Caused by Voltage Transient.Test Procedures Revised | |
| 05000318/LER-1979-015, Forwards LER 79-015/03L-0 | Forwards LER 79-015/03L-0 | |
| 05000318/LER-1979-015-03, /03L-0 on 790519:containment Air Lock Outer Door Air Leakage Discovered to Be in Excess of Tech Spec Limits. Caused by Failed Door Gasket.New Gaskets Installed & Door Latch Rollers Adjusted | /03L-0 on 790519:containment Air Lock Outer Door Air Leakage Discovered to Be in Excess of Tech Spec Limits. Caused by Failed Door Gasket.New Gaskets Installed & Door Latch Rollers Adjusted | |
| 05000317/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000317/LER-1979-016-03, /03L-0 on 790421:one of Eight Main Steam Safety Valves Tested Found Out of Tolerence in Conservative Direction.Caused by Difference in Ambient Conditions Between Time When Valve Last Reset & Time of Test | /03L-0 on 790421:one of Eight Main Steam Safety Valves Tested Found Out of Tolerence in Conservative Direction.Caused by Difference in Ambient Conditions Between Time When Valve Last Reset & Time of Test | |
| 05000318/LER-1979-016-03, /03L-0 on 790520:while Inserting Group 5 Control Element Assemblies,Cea 36 Dropped to Bottom of Core.Caused by Spike in 15 Volt Power Supply.Design Mod to Be Installed During Next Refueling Outage | /03L-0 on 790520:while Inserting Group 5 Control Element Assemblies,Cea 36 Dropped to Bottom of Core.Caused by Spike in 15 Volt Power Supply.Design Mod to Be Installed During Next Refueling Outage | |
| 05000318/LER-1979-016, Forwards LER 79-016/03L-0 | Forwards LER 79-016/03L-0 | |
| 05000317/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000317/LER-1979-017-03, /03L-0 on 790515:during Overspeed testing,12 Diesel Generator Auxiliary Blowers Failed,Rendering Diesel Inoperative.Caused by Interference Between Lobes of Blower. Blower Returned to Vendor for Rebuilding | /03L-0 on 790515:during Overspeed testing,12 Diesel Generator Auxiliary Blowers Failed,Rendering Diesel Inoperative.Caused by Interference Between Lobes of Blower. Blower Returned to Vendor for Rebuilding | |
| 05000318/LER-1979-017-03, /03L-0 on 790520:during Surveillance Testing, Diesel Generator 21 Failed to Start Upon Actuation of Remote Start Switch.Caused by Normally de-energized Low Speed Relay Being Energized During Initial Test | /03L-0 on 790520:during Surveillance Testing, Diesel Generator 21 Failed to Start Upon Actuation of Remote Start Switch.Caused by Normally de-energized Low Speed Relay Being Energized During Initial Test | |
| 05000318/LER-1979-017, Forwards LER 79-017/03L-0 | Forwards LER 79-017/03L-0 | |
| 05000317/LER-1979-018, Forwards LER 79-018/04T-0 | Forwards LER 79-018/04T-0 | |
| 05000318/LER-1979-018, Forwards LER 79-018/03L-0 | Forwards LER 79-018/03L-0 | |
| 05000318/LER-1979-018-03, /03L-0 on 790527:4 Kv Feedwater Breaker 152-2401 Tripped Open Causing Loss of Power to 4 Kv Bus 24.Caused by Spurious Signal or Momentary Loss of Power to ESFAS Zb Logic Cabinet 2C68L.No Further Action Required | /03L-0 on 790527:4 Kv Feedwater Breaker 152-2401 Tripped Open Causing Loss of Power to 4 Kv Bus 24.Caused by Spurious Signal or Momentary Loss of Power to ESFAS Zb Logic Cabinet 2C68L.No Further Action Required | |
| 05000317/LER-1979-018-04, /04T-0 on 790517:oyster Samples Showed Ag-110m at 88 Plus or Minus 5% Pci/Kg & Decreasing.May Be Caused by Depuration.No Corrective Action Required | /04T-0 on 790517:oyster Samples Showed Ag-110m at 88 Plus or Minus 5% Pci/Kg & Decreasing.May Be Caused by Depuration.No Corrective Action Required | |
| 05000318/LER-1979-019-03, /03L-0 on 790525:during Performance of Surveillance Testing,Engineered Safety Features Actuation Sys Module SIAS B-8 Failed to Actuate at 1,730.Cause Unstated.Module Replaced | /03L-0 on 790525:during Performance of Surveillance Testing,Engineered Safety Features Actuation Sys Module SIAS B-8 Failed to Actuate at 1,730.Cause Unstated.Module Replaced | |
| 05000318/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000317/LER-1979-019, Forwards LER 79-019/03L-0 | Forwards LER 79-019/03L-0 | |
| 05000317/LER-1979-019-03, /03L-0 on 790606:discovered That Number 11 Control Room Air Conditioning Unit Breaker Had Tripped.Caused by Windings of Compressor Motor Exceeding Resistance Acceptance Criteria.Compressor Replaced | /03L-0 on 790606:discovered That Number 11 Control Room Air Conditioning Unit Breaker Had Tripped.Caused by Windings of Compressor Motor Exceeding Resistance Acceptance Criteria.Compressor Replaced | |
| 05000317/LER-1979-020-03, /03L-0 on 790706:while Performing post-mod Test on Rcs,Power Relief Valves RC-402-ERV Failed to Fully Close After Lifting.Cause Not Determined.Pilot Valve Stroke Adjusted & Relief Valve Stroked Satisfactorily | /03L-0 on 790706:while Performing post-mod Test on Rcs,Power Relief Valves RC-402-ERV Failed to Fully Close After Lifting.Cause Not Determined.Pilot Valve Stroke Adjusted & Relief Valve Stroked Satisfactorily | |
