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| 05000261/LER-1981-001, Updated LER 81-001/01T-1:on 810109,turbine Runback & Automatic Rod Withdrawal Block Protection Defeated W/Power Range Channel N41 Being Out of Svc.Caused by Improper Rod Drop Analysis.Administrative Controls Revised | Updated LER 81-001/01T-1:on 810109,turbine Runback & Automatic Rod Withdrawal Block Protection Defeated W/Power Range Channel N41 Being Out of Svc.Caused by Improper Rod Drop Analysis.Administrative Controls Revised | |
| 05000261/LER-1981-002, Updated LER 81-002/01T-2:on 810113,review of Svc Water Sys Revealed Potential Unmonitored Release Path on Svc Water Return Lines from Containment for Hydrogen Vent Header Motor Coolers.Caused by Design Error.Sys Will Be Modifie | Updated LER 81-002/01T-2:on 810113,review of Svc Water Sys Revealed Potential Unmonitored Release Path on Svc Water Return Lines from Containment for Hydrogen Vent Header Motor Coolers.Caused by Design Error.Sys Will Be Modified | |
| 05000261/LER-1981-002-01, /01T-3:on 810113,review of Svc Water Sys Revealed Potential Unmonitored Release Path to Environ.Caused by Lack of Radiation Monitoring on Svc Water Return Lines from Containment.Discharge Lines Modified | /01T-3:on 810113,review of Svc Water Sys Revealed Potential Unmonitored Release Path to Environ.Caused by Lack of Radiation Monitoring on Svc Water Return Lines from Containment.Discharge Lines Modified | |
| 05000261/LER-1981-004, Forwards Updated LER 81-004/03L-1 | Forwards Updated LER 81-004/03L-1 | |
| 05000261/LER-1981-004-03, Primary Coolant Sys Leak Found.Caused by Sample Cooler Tube Bundle Leakage Due to Normal Wear.Bundle Replaced.Review of Maint Records Revealed No Generic Problems | Primary Coolant Sys Leak Found.Caused by Sample Cooler Tube Bundle Leakage Due to Normal Wear.Bundle Replaced.Review of Maint Records Revealed No Generic Problems | |
| 05000261/LER-1981-006-01, /01T-0:on 820715,motor Cooler Leak Found in Containment Fan Cooler HVH-2.HVH-2 Shut Down & Svc Water to Unit Isolated.Caused by Corrosion/Erosion of Cooler Tubing. Leak Repaired & Motor Coolers Will Be Replaced W/New Units | /01T-0:on 820715,motor Cooler Leak Found in Containment Fan Cooler HVH-2.HVH-2 Shut Down & Svc Water to Unit Isolated.Caused by Corrosion/Erosion of Cooler Tubing. Leak Repaired & Motor Coolers Will Be Replaced W/New Units | |
| 05000261/LER-1981-007, Updated LER 81-007/01T-1:on 810122,potential Modeling Error in ECCS Model Used for LOCA Analysis Reported.Caused by Shift in Peak Clad Temp.New ECCS Analysis Performed in Aug 1981.No Impact on Public Health & Safety | Updated LER 81-007/01T-1:on 810122,potential Modeling Error in ECCS Model Used for LOCA Analysis Reported.Caused by Shift in Peak Clad Temp.New ECCS Analysis Performed in Aug 1981.No Impact on Public Health & Safety | |
| 05000261/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000261/LER-1981-008-03, /03L-0:on 810225 While Performing Monthly Periodic Test CPL-PT-5.5,Hagan Signal Comparator Module Found Inoperable.Cause Not Stated.Comparator Replaced | /03L-0:on 810225 While Performing Monthly Periodic Test CPL-PT-5.5,Hagan Signal Comparator Module Found Inoperable.Cause Not Stated.Comparator Replaced | |
| 05000261/LER-1981-013, Forwards Updated LER 81-013/03L-1 | Forwards Updated LER 81-013/03L-1 | |
| 05000261/LER-1981-013-03, Determined Containment Isolation Valves Not Tested in Required Manner.Seven of Eight Valves Functioning as Designed.Eighth Valve Tested & Shown Operable.Test Undergoing Revision | Determined Containment Isolation Valves Not Tested in Required Manner.Seven of Eight Valves Functioning as Designed.Eighth Valve Tested & Shown Operable.Test Undergoing Revision | |
| 05000261/LER-1981-014-03, /03L-0:on 810523,discovered That Hagan Summator PM-446B Had Shifted Nonconservatively Approx 3%.Caused by Failure of Filter Capacitor Due to Normal Wear.Faulty Capacitor Replaced | /03L-0:on 810523,discovered That Hagan Summator PM-446B Had Shifted Nonconservatively Approx 3%.Caused by Failure of Filter Capacitor Due to Normal Wear.Faulty Capacitor Replaced | |
| 05000261/LER-1981-014, Forwards LER 81-014/03L-0 | Forwards LER 81-014/03L-0 | |
| 05000261/LER-1981-015, Forwards LER 81-015/03L-0 | Forwards LER 81-015/03L-0 | |
| 05000261/LER-1981-015-03, /03L-0:on 810525,computer Box FM-475 Found to Be Out of Acceptable Tolerances & Several Checkpoints Showed Erratic Readings During Loop a Steam Flow Channel Investigation.Caused by Two Worn Electronic Components | /03L-0:on 810525,computer Box FM-475 Found to Be Out of Acceptable Tolerances & Several Checkpoints Showed Erratic Readings During Loop a Steam Flow Channel Investigation.Caused by Two Worn Electronic Components | |
| 05000261/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000261/LER-1981-016-03, /03L-0:on 810611,during Startup,Motor Driven Auxiliary Feedwater Pump a Tripped Due to Low Discharge Pressure While Feeding Steam Generators.Event Reoccurred on 810716.Caused by Backleakage Through Discharge Valve AFW-40 | /03L-0:on 810611,during Startup,Motor Driven Auxiliary Feedwater Pump a Tripped Due to Low Discharge Pressure While Feeding Steam Generators.Event Reoccurred on 810716.Caused by Backleakage Through Discharge Valve AFW-40 | |
| 05000261/LER-1981-017-03, /03L-0:on 810619,auxiliary Feedwater Pump a Tripped on Low Discharge Pressure.Caused by Improper Throttle Setting of Discharge Valve.Valve Repositioned | /03L-0:on 810619,auxiliary Feedwater Pump a Tripped on Low Discharge Pressure.Caused by Improper Throttle Setting of Discharge Valve.Valve Repositioned | |
| 05000261/LER-1981-017, Forwards LER 81-017/03L-0 | Forwards LER 81-017/03L-0 | |
| 05000261/LER-1981-018-03, /03L-0:on 810701,Channel I (PI-474) of a Steam Generator Steam Line Pressure Indicated High Compared to Two Redundant Channels.Caused by Throttled Root Isolation Valve MSV-14.Valve Reopened | /03L-0:on 810701,Channel I (PI-474) of a Steam Generator Steam Line Pressure Indicated High Compared to Two Redundant Channels.Caused by Throttled Root Isolation Valve MSV-14.Valve Reopened | |
| 05000261/LER-1981-018, Forwards LER 81-018/03L-0 | Forwards LER 81-018/03L-0 | |
| 05000261/LER-1981-019-03, /03L-0:on 810705,w/unit at 95% Power,Svc Water Booster Pump (Swbp) a Motor Tripped.On 810706,SWBP a Motor Tripped Again.Caused by Normal Wear of Motor Bearings & Possible Breaker Problem,Respectively | /03L-0:on 810705,w/unit at 95% Power,Svc Water Booster Pump (Swbp) a Motor Tripped.On 810706,SWBP a Motor Tripped Again.Caused by Normal Wear of Motor Bearings & Possible Breaker Problem,Respectively | |
| 05000261/LER-1981-019, Forwards LER 81-019/03L-0 | Forwards LER 81-019/03L-0 | |
| 05000261/LER-1981-020-03, /03L-0:on 810902,containment Spray Check Valve SI-890B & Associated Flow Path Declared Inoperable.Caused by Failure to Perform Post Maint Testing Prior to Startup Due to Oversight.Valve Tested.Procedures Will Be Revised | /03L-0:on 810902,containment Spray Check Valve SI-890B & Associated Flow Path Declared Inoperable.Caused by Failure to Perform Post Maint Testing Prior to Startup Due to Oversight.Valve Tested.Procedures Will Be Revised | |
| 05000261/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000261/LER-1981-021, Forwards LER 81-021/01T-0 | Forwards LER 81-021/01T-0 | |
| 05000261/LER-1981-021-01, /01T-0:on 810925,w/unit at 50% Power,Group 2 Control Bank D Control Rods Were Inoperable & Reactor Shutdown Commenced.Caused by Faulty Input/Output Amplifier Printed Circuit Card in Control Rod Logic Cabinet | /01T-0:on 810925,w/unit at 50% Power,Group 2 Control Bank D Control Rods Were Inoperable & Reactor Shutdown Commenced.Caused by Faulty Input/Output Amplifier Printed Circuit Card in Control Rod Logic Cabinet | |
| 05000261/LER-1981-022, Forwards LER 81-022/03L-0 | Forwards LER 81-022/03L-0 | |
| 05000261/LER-1981-022-03, /03L-0:on 811015,w/unit at 50% Power,Lower than Normal Temp Indication Noted on Strip Chart Recorder for Valves on Discharge Line of Boron Injection Tank.Caused by Broken Wire Splice in Heat Tracing Circuit 70 | /03L-0:on 811015,w/unit at 50% Power,Lower than Normal Temp Indication Noted on Strip Chart Recorder for Valves on Discharge Line of Boron Injection Tank.Caused by Broken Wire Splice in Heat Tracing Circuit 70 | |
| 05000261/LER-1981-023-03, /03L-0:on 811022,at 50% Power,Safety Injection Pump Started from Control Room for Routine Filling of Accumulators & Circuit Breaker Tripped.Cause Unidentified. No Further Action Considered Necessary | /03L-0:on 811022,at 50% Power,Safety Injection Pump Started from Control Room for Routine Filling of Accumulators & Circuit Breaker Tripped.Cause Unidentified. No Further Action Considered Necessary | |
| 05000261/LER-1981-023, Forwards LER 81-023/03L-0 | Forwards LER 81-023/03L-0 | |
| 05000261/LER-1981-024, Forwards LER 81-024/03L-0 | Forwards LER 81-024/03L-0 | |
| 05000261/LER-1981-024-03, /03L-0:on 811028,heat Tracing for Motor Operated Valves on Discharge Line of Boron Injection Tank Found Failed.Caused by Short to Ground Resulting from Insulation Repairs.Personnel Cautioned Re Insulation | /03L-0:on 811028,heat Tracing for Motor Operated Valves on Discharge Line of Boron Injection Tank Found Failed.Caused by Short to Ground Resulting from Insulation Repairs.Personnel Cautioned Re Insulation | |
| 05000261/LER-1981-025-03, /03L-0:on 811102,emergency Diesel Generator B Failed to Start Manually.Caused by Loss of Prime in Fuel Oil Sys,Possibly Due to Debris in Ball Check Valve.Generator Returned to Svc | /03L-0:on 811102,emergency Diesel Generator B Failed to Start Manually.Caused by Loss of Prime in Fuel Oil Sys,Possibly Due to Debris in Ball Check Valve.Generator Returned to Svc | |
| 05000261/LER-1981-025, Forwards LER 81-025/03L-0 | Forwards LER 81-025/03L-0 | |
| 05000261/LER-1981-026, Forwards LER 81-026/01T-0 | Forwards LER 81-026/01T-0 | |
| 05000261/LER-1981-026-01, /01T-0:on 811120,primary to Secondary Leak of Approx 1.5 Gpm Found in Steam Generator A.Caused by Leaking Explosive Plug.Plant Shut Down,Plug Removed & Weld Repaired on 811127 | /01T-0:on 811120,primary to Secondary Leak of Approx 1.5 Gpm Found in Steam Generator A.Caused by Leaking Explosive Plug.Plant Shut Down,Plug Removed & Weld Repaired on 811127 | |
| 05000261/LER-1981-028-03, /03L-0:on 811125,steam Generator low-low Level Trip & Alarm Bistables BS-494-A1 & BS-494-A2 Found to Be Inoperable During Periodic Test PT-5.5 W/Unit at Cold Shutdown.Caused by Failure of Instrument Channel LI-494 | /03L-0:on 811125,steam Generator low-low Level Trip & Alarm Bistables BS-494-A1 & BS-494-A2 Found to Be Inoperable During Periodic Test PT-5.5 W/Unit at Cold Shutdown.Caused by Failure of Instrument Channel LI-494 | |
| 05000261/LER-1981-028, Forwards LER 81-028/03L-0 | Forwards LER 81-028/03L-0 | |
| 05000261/LER-1981-029, Forwards LER 81-029/03L-0 | Forwards LER 81-029/03L-0 | |
| 05000261/LER-1981-029-03, /03L-0:on 811130,w/unit at Hot Shutdown,Leak Was Discovered in Chemical & Vol Control Sys.Caused by Failed bonnet-to-body Gasket on Valve CVC-291.Gasket Replaced | /03L-0:on 811130,w/unit at Hot Shutdown,Leak Was Discovered in Chemical & Vol Control Sys.Caused by Failed bonnet-to-body Gasket on Valve CVC-291.Gasket Replaced | |
| 05000261/LER-1981-030-03, /03L-0:on 811130,emergency Diesel Generator B Failed to Reach Rated Output Voltage Following Automatic Start Initiated by Safety Injection Signal.Caused by Faulty auto-voltage Adjust Reostat.Failure Due to Normal Wear | /03L-0:on 811130,emergency Diesel Generator B Failed to Reach Rated Output Voltage Following Automatic Start Initiated by Safety Injection Signal.Caused by Faulty auto-voltage Adjust Reostat.Failure Due to Normal Wear | |
| 05000261/LER-1981-030, Forwards LER 81-030/03L-0 | Forwards LER 81-030/03L-0 | |
| 05000261/LER-1981-031-01, /01T-0:on 811201,pressurizer Power Operated Relief Valve Block Valves Were Determined Not to Meet Design Specs. Valve Motor Operators Failed to Shut Valves Completely Following 811130 Transient.Block Valves Closed Manually | /01T-0:on 811201,pressurizer Power Operated Relief Valve Block Valves Were Determined Not to Meet Design Specs. Valve Motor Operators Failed to Shut Valves Completely Following 811130 Transient.Block Valves Closed Manually | |
| 05000261/LER-1981-032-03, /03L-0:on 811205,boric Acid Transfer Pump a Tripped & Was Declared Inoperable.Caused by Error in Valve Lineup Procedure & Open Winding in Transfer Pump Motor. Procedure Revised & Motor Replaced | /03L-0:on 811205,boric Acid Transfer Pump a Tripped & Was Declared Inoperable.Caused by Error in Valve Lineup Procedure & Open Winding in Transfer Pump Motor. Procedure Revised & Motor Replaced | |
| 05000261/LER-1981-032, Forwards LER 81-032/03L-0 | Forwards LER 81-032/03L-0 | |
| 05000261/LER-1981-033, Forwards LER 81-033/01T-0 | Forwards LER 81-033/01T-0 | |
| 05000261/LER-1981-033-01, /01T-0:on 811228,error in Tech Spec Heatup & Cooldown Curves Found to Be Not Reported to Nrc.Caused by Administrative Reporting Failure & Errors in Calculation. Info Will Be Reported as Tech Spec Change by 820131 | /01T-0:on 811228,error in Tech Spec Heatup & Cooldown Curves Found to Be Not Reported to Nrc.Caused by Administrative Reporting Failure & Errors in Calculation. Info Will Be Reported as Tech Spec Change by 820131 | |
| 05000261/LER-1981-034-03, /03L-0:on 811211,loop 2 Steamline Pressure Channel Indicated Higher than Other Channels.Caused by Frozen Sensing Lines in Pressure Transmitter & Failure to Return Freeze Protection Circuit to Svc After Maint | /03L-0:on 811211,loop 2 Steamline Pressure Channel Indicated Higher than Other Channels.Caused by Frozen Sensing Lines in Pressure Transmitter & Failure to Return Freeze Protection Circuit to Svc After Maint | |
| 05000261/LER-1981-034, Forwards LER 81-034/03L-0 | Forwards LER 81-034/03L-0 | |