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| 05000251/LER-1980-001, Forwards LER 80-001/03L-0 | Forwards LER 80-001/03L-0 | |
| 05000250/LER-1980-001, Forwards LER 80-001/03L-0 | Forwards LER 80-001/03L-0 | |
| 05000251/LER-1980-001-03, /03L-0:on 800121,during Semiannual Test of Fire & Smoke Detection Sys in Containment Electrical Penetration Zone 6,supply of Test Gas Became Depleted.Caused by Lack of Assurance by Maint & Supply Personnel Re Sufficient Gas | /03L-0:on 800121,during Semiannual Test of Fire & Smoke Detection Sys in Containment Electrical Penetration Zone 6,supply of Test Gas Became Depleted.Caused by Lack of Assurance by Maint & Supply Personnel Re Sufficient Gas | |
| 05000250/LER-1980-001-03, /03L-0:on 800103,during Routine Sys Walkthrough, East Fire Pump Found to Be Inoperable.Investigation Revealed Pump May Have Been Inoperable Due to Power Supply Breaker Not Being Closed.Caused by Operator Error | /03L-0:on 800103,during Routine Sys Walkthrough, East Fire Pump Found to Be Inoperable.Investigation Revealed Pump May Have Been Inoperable Due to Power Supply Breaker Not Being Closed.Caused by Operator Error | |
| 05000250/LER-1980-002, Forwards LER 80-002/03L-0 | Forwards LER 80-002/03L-0 | |
| 05000251/LER-1980-002-03, /03L-0:on 800214,for 17-h During Hot Shutdown, Condensate Storage Tank Contained Less than 185,000 Gallons Required by Tech Specs.Caused by Failed Seal W/Resulting Gear Damage on Agitator Transmission.Agitator Was Replaced | /03L-0:on 800214,for 17-h During Hot Shutdown, Condensate Storage Tank Contained Less than 185,000 Gallons Required by Tech Specs.Caused by Failed Seal W/Resulting Gear Damage on Agitator Transmission.Agitator Was Replaced | |
| 05000251/LER-1980-002, Forwards LER 80-002/03L-0 | Forwards LER 80-002/03L-0 | |
| 05000250/LER-1980-002-03, /03L-0:on 800203,during Startup,Units 3 & 4 Condensate Storage Tanks Decreased to Less than 185,000- Gallon Requirement.Caused by Excessive Water Treatment Plant Output During Unit 3 Power Physics Testing | /03L-0:on 800203,during Startup,Units 3 & 4 Condensate Storage Tanks Decreased to Less than 185,000- Gallon Requirement.Caused by Excessive Water Treatment Plant Output During Unit 3 Power Physics Testing | |
| 05000251/LER-1980-003-03, While Testing 4C Steam Generator Feedwater Control Valve,Change in Steam Generator Level Lifted Low Setpoint Valve.Valve Did Not Fully Reseat. Caused by Binding Between Lifting Gear & Release Nut | While Testing 4C Steam Generator Feedwater Control Valve,Change in Steam Generator Level Lifted Low Setpoint Valve.Valve Did Not Fully Reseat. Caused by Binding Between Lifting Gear & Release Nut | |
| 05000251/LER-1980-003, Forwards Updated LER 80-003/03L-0 | Forwards Updated LER 80-003/03L-0 | |
| 05000250/LER-1980-003, Forwards LER 80-003/03L-0 | Forwards LER 80-003/03L-0 | |
| 05000250/LER-1980-003-03, /03L-0:on 800212,during Power Escalation Following Refueling,Reactor Power Indicated by Power Range Nuclear Instrumentation Was Low.Caused by Bypass Valve on Feedwater Transmitter 3B Not Fully Closed & Nis Improperly Adjuste | /03L-0:on 800212,during Power Escalation Following Refueling,Reactor Power Indicated by Power Range Nuclear Instrumentation Was Low.Caused by Bypass Valve on Feedwater Transmitter 3B Not Fully Closed & Nis Improperly Adjusted | |
| 05000251/LER-1980-004-03, /03L-0:on 800216,while at Hot Shutdown,Condensate Storage Tank Contained Less than 85,000 Gallons for 4-h. Caused by Broken Drive Belt on Agitator.Motor Remounted to Accept Available Drive Belt | /03L-0:on 800216,while at Hot Shutdown,Condensate Storage Tank Contained Less than 85,000 Gallons for 4-h. Caused by Broken Drive Belt on Agitator.Motor Remounted to Accept Available Drive Belt | |
| 05000251/LER-1980-004, Forwards LER 80-004/03L-0 | Forwards LER 80-004/03L-0 | |
| 05000250/LER-1980-004, Forwards Updated LER 80-004/03X-1 | Forwards Updated LER 80-004/03X-1 | |
| 05000250/LER-1980-004-03, Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired | Radiator Tube Leak on Emergency Diesel Generator a Detected.Probable Cause Due to Foreign Object Being Forced Into Radiator by Cooling Fans & Degradation Induced by External Environ.Leak Repaired | |
| 05000250/LER-1980-005, Forwards LER 80-005/03L-0 | Forwards LER 80-005/03L-0 | |
| 05000250/LER-1980-005-03, /03L-0:on 800229,during Review of Maint Procedure 15537.2,fire Hose Station Found Not Fully Operable.Caused by Misunderstanding of What Constitutes Operability & Failure of Administrative Controls.Procedure Will Be Revised | /03L-0:on 800229,during Review of Maint Procedure 15537.2,fire Hose Station Found Not Fully Operable.Caused by Misunderstanding of What Constitutes Operability & Failure of Administrative Controls.Procedure Will Be Revised | |
| 05000251/LER-1980-005-03, /03L-0:on 800331,during Normal Operation,Process Radiation Monitors R-11 & R-12 Were Out of Svc for Approx 11-h.Caused by Failure of Air Sampling Blower Due to Normal Wear.Blower Replaced.Monitors Returned to Svc | /03L-0:on 800331,during Normal Operation,Process Radiation Monitors R-11 & R-12 Were Out of Svc for Approx 11-h.Caused by Failure of Air Sampling Blower Due to Normal Wear.Blower Replaced.Monitors Returned to Svc | |
| 05000251/LER-1980-005, Forwards LER 80-005/03L-0 | Forwards LER 80-005/03L-0 | |
| 05000250/LER-1980-006, Forwards LER 80-006/03L-0 | Forwards LER 80-006/03L-0 | |
| 05000250/LER-1980-006-03, /03L-0:on 800316,during Review of MP 15537.2,four Post Indicator Valves in Fire Protection Water Sys Found Not Inspected within Time Interval Limit.Caused by Misunderstanding of Responsibility | /03L-0:on 800316,during Review of MP 15537.2,four Post Indicator Valves in Fire Protection Water Sys Found Not Inspected within Time Interval Limit.Caused by Misunderstanding of Responsibility | |
| 05000251/LER-1980-006, Forwards LER 80-006/03L-0 | Forwards LER 80-006/03L-0 | |
| 05000251/LER-1980-006-03, /03L-0:on 800407,during Inservice Insp Testing, Auxiliary Feedwater Pump a Failed to Deliver Flow Rate to Unit 4 Steam Generators.Caused by Control Circuit Calibr or Flow Restriction in Valve 4-20-142 | /03L-0:on 800407,during Inservice Insp Testing, Auxiliary Feedwater Pump a Failed to Deliver Flow Rate to Unit 4 Steam Generators.Caused by Control Circuit Calibr or Flow Restriction in Valve 4-20-142 | |
| 05000250/LER-1980-007, Forwards LER 80-007/03L-0 | Forwards LER 80-007/03L-0 | |
| 05000250/LER-1980-007-03, /03L-0:on 800424,during Planning & Implementation of Surveillance Per Tech Spec 4.15.4.a.1,six Electrical Penetration Fire Barriers Found Nonfunctional.Caused by Incomplete Installation.Barriers Repaired | /03L-0:on 800424,during Planning & Implementation of Surveillance Per Tech Spec 4.15.4.a.1,six Electrical Penetration Fire Barriers Found Nonfunctional.Caused by Incomplete Installation.Barriers Repaired | |
| 05000251/LER-1980-007-01, /01T-2:on 800507,disc Stud Nut Discovered Missing from Main Steam Check Valve 4A.Caused by Failure of Associated Locking Device.Disc Studs Replaced & Improved Locking Device Installed | /01T-2:on 800507,disc Stud Nut Discovered Missing from Main Steam Check Valve 4A.Caused by Failure of Associated Locking Device.Disc Studs Replaced & Improved Locking Device Installed | 10 CFR 21.21(b)(1) |
| 05000251/LER-1980-007, Forwards Updated LER 80-007/03X-1 | Forwards Updated LER 80-007/03X-1 | |
| 05000251/LER-1980-007-03, Disc Stud Nut Discovered Missing from Main Stem Check Valve 4A.Caused by Failure of Associated Locking Device.Disc Studs Replaced & Improved Locking Device Installed | Disc Stud Nut Discovered Missing from Main Stem Check Valve 4A.Caused by Failure of Associated Locking Device.Disc Studs Replaced & Improved Locking Device Installed | |
| 05000250/LER-1980-008-01, /01X-1:on 800505,insp & Reanalyses Per IE Bulletin 79-14 Revealed Inadequate Support of 3A & 3B Resistance Temp Detector Bypass Loops.Change Mod Installed to Properly Support Piping | /01X-1:on 800505,insp & Reanalyses Per IE Bulletin 79-14 Revealed Inadequate Support of 3A & 3B Resistance Temp Detector Bypass Loops.Change Mod Installed to Properly Support Piping | |
| 05000250/LER-1980-008, Forwards LER 80-008/01X-1,updating 800519 Initial Rept | Forwards LER 80-008/01X-1,updating 800519 Initial Rept | |
| 05000251/LER-1980-008-01, /01T-0:on 800523,review of Radiographs Per IE Bulletin 79-13 Revealed Indications of Cracking in Feedwater Nozzle to Pipe Weld on Steam Generator 4 C Reducers.Cause Not Stated.Fittings Containing Defects Are Being Replaced | /01T-0:on 800523,review of Radiographs Per IE Bulletin 79-13 Revealed Indications of Cracking in Feedwater Nozzle to Pipe Weld on Steam Generator 4 C Reducers.Cause Not Stated.Fittings Containing Defects Are Being Replaced | |
| 05000251/LER-1980-008, Forwards LER 80-008/01T-0 | Forwards LER 80-008/01T-0 | |
| 05000250/LER-1980-009-03, /03L-0:on 800511,while Performing OP 14004.1,steam Generator Protection Channels Periodic Test,Trip Setpoints of Bistable BS-3-475 & 485A Found Nonconservative.Caused by Instrument Drift.Bistables Reset | /03L-0:on 800511,while Performing OP 14004.1,steam Generator Protection Channels Periodic Test,Trip Setpoints of Bistable BS-3-475 & 485A Found Nonconservative.Caused by Instrument Drift.Bistables Reset | |
| 05000251/LER-1980-009, Forwards LER 80-009/03L-0 | Forwards LER 80-009/03L-0 | |
| 05000250/LER-1980-009, Forwards LER 80-009/03L-0 | Forwards LER 80-009/03L-0 | |
| 05000251/LER-1980-009-03, /03L-0:on 800614,during Shutdown,Low Flow Was Indicated on 4C Bypass Loop.Caused by Valve Stem Separating from Disc in Manner Which Prevented Valve from Fully Opening | /03L-0:on 800614,during Shutdown,Low Flow Was Indicated on 4C Bypass Loop.Caused by Valve Stem Separating from Disc in Manner Which Prevented Valve from Fully Opening | |
| 05000250/LER-1980-010-03, /03L-0:on 800514,during Normal Operation,Process Radiation Monitors R-11 & R-12 Were Out of Svc for Approx 16-h.Caused by Failure of Air Sampling Blower Due to Normal Wear.Blower Replaced & Monitor Returned to Svc | /03L-0:on 800514,during Normal Operation,Process Radiation Monitors R-11 & R-12 Were Out of Svc for Approx 16-h.Caused by Failure of Air Sampling Blower Due to Normal Wear.Blower Replaced & Monitor Returned to Svc | |
| 05000250/LER-1980-010, Forwards LER 80-010/03L-0 | Forwards LER 80-010/03L-0 | |
| 05000251/LER-1980-010-03, Leakage Developed Through Crack in North Channel Cover of Component Cooling Water Heat Exchanger 4C.Caused by Corrosion.Channel Cover Replaced | Leakage Developed Through Crack in North Channel Cover of Component Cooling Water Heat Exchanger 4C.Caused by Corrosion.Channel Cover Replaced | |
| 05000251/LER-1980-010, Forwards Updated LER 80-010/03X-1 | Forwards Updated LER 80-010/03X-1 | |
| 05000251/LER-1980-011, Forwards LER 80-011/03L-0 | Forwards LER 80-011/03L-0 | |
| 05000250/LER-1980-011-01, /01T-0:on 800527,util Was Notified by NSSS Vendor That Nonconservative Error Had Been Discovered in Computer Inputs Used in Feb 1979 10CFR50.46 App K LOCA Analysis. Caused by Personnel Error | /01T-0:on 800527,util Was Notified by NSSS Vendor That Nonconservative Error Had Been Discovered in Computer Inputs Used in Feb 1979 10CFR50.46 App K LOCA Analysis. Caused by Personnel Error | |
| 05000251/LER-1980-011-03, /03L-0:on 800818,during Surveillance Testing,Six Ionization Detectors in 4W Electrical Penetration Room Found Inoperable.Caused by Improper Installation of Upgrade to Fire Protection Sys | /03L-0:on 800818,during Surveillance Testing,Six Ionization Detectors in 4W Electrical Penetration Room Found Inoperable.Caused by Improper Installation of Upgrade to Fire Protection Sys | |
| 05000250/LER-1980-011, Forwards LER 80-011/01T-0 | Forwards LER 80-011/01T-0 | |
| 05000250/LER-1980-012-03, /03L-0:on 800620,daily Calibr of Unit 3 Power Range Channel Not Performed as Required.Caused by Personnel Error Due to Misunderstanding Between Person Performing Test & Person Responsible for Test | /03L-0:on 800620,daily Calibr of Unit 3 Power Range Channel Not Performed as Required.Caused by Personnel Error Due to Misunderstanding Between Person Performing Test & Person Responsible for Test | |
| 05000251/LER-1980-012-03, /03L-0:on 801013,excessive Leakage Past Primary Packing in Charging Pump 4A Caused Pump to Be Removed from Svc.Caused by Loose Packing.Packing Replaced | /03L-0:on 801013,excessive Leakage Past Primary Packing in Charging Pump 4A Caused Pump to Be Removed from Svc.Caused by Loose Packing.Packing Replaced | |
| 05000250/LER-1980-012, Forwards LER 80-012/03L-0 | Forwards LER 80-012/03L-0 | |
| 05000251/LER-1980-012, Forwards LER 80-012/03L-0 | Forwards LER 80-012/03L-0 | |
| 05000250/LER-1980-013, Forwards LER 80-013/09X-0 | Forwards LER 80-013/09X-0 | |
