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| 05000302/LER-1981-001-01, /01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge | /01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge | |
| 05000302/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | |
| 05000302/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000302/LER-1981-002-03, /03L-0:on 810109,containment Isolation Valve CAV-1 Failed to Close After Sampling Pressurizer Steam Space. Caused by Failed Contacts in Torque Switch of Valve Operator.Switch Replaced & Operability Restored | /03L-0:on 810109,containment Isolation Valve CAV-1 Failed to Close After Sampling Pressurizer Steam Space. Caused by Failed Contacts in Torque Switch of Valve Operator.Switch Replaced & Operability Restored | |
| 05000302/LER-1981-003, Forwards LER 81-003/01T-0 | Forwards LER 81-003/01T-0 | |
| 05000302/LER-1981-003-01, /01T-0:on 810129,containment Isolation Valves AHV-1C & AHV-1D Found Inoperable Contrary to Tech Spec 3.6.3.1.Caused by Failure of Valve to Seal at Low Ambient Temp During Purge Conditions | /01T-0:on 810129,containment Isolation Valves AHV-1C & AHV-1D Found Inoperable Contrary to Tech Spec 3.6.3.1.Caused by Failure of Valve to Seal at Low Ambient Temp During Purge Conditions | |
| 05000302/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000302/LER-1981-004-03, /03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker | /03L-0:on 810119,position Indication for Containment Isolation Valves CAV-2 & CAV-126 Found Inoperable,In Violation of Tech Spec 3.6.3.1.Cause of CAV-2 Inoperability Unknown.Cause of CAV-126 Was Bad Breaker | |
| 05000302/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | |
| 05000302/LER-1981-005-03, /03L-0:on 801215,mechanical Seal for Bldg Spray Pump BSP-1A Found Leaking Greater than 6 Gallons/H,In Violation of Tech Spec 3.6.2.1.Caused by Defective Mechanical Seal.Review of Maint Procedure in Progress | /03L-0:on 801215,mechanical Seal for Bldg Spray Pump BSP-1A Found Leaking Greater than 6 Gallons/H,In Violation of Tech Spec 3.6.2.1.Caused by Defective Mechanical Seal.Review of Maint Procedure in Progress | |
| 05000302/LER-1981-006-03, /03L-0:on 810123,breaker for Control Complex Emergency Ventilation Fan AHF-18A Found Open.Caused by Inadvertent Bumping of Breaker.Breaker Shut,Operability Checks Performed & Personnel Advised to Exercise Caution | /03L-0:on 810123,breaker for Control Complex Emergency Ventilation Fan AHF-18A Found Open.Caused by Inadvertent Bumping of Breaker.Breaker Shut,Operability Checks Performed & Personnel Advised to Exercise Caution | |
| 05000302/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000302/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000302/LER-1981-007-03, /03L-0:on 810126,radiation Monitor RM-A5 Failed to Restart After Filter Change.Caused by Blown Fuse.Fuse Replaced | /03L-0:on 810126,radiation Monitor RM-A5 Failed to Restart After Filter Change.Caused by Blown Fuse.Fuse Replaced | |
| 05000302/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000302/LER-1981-008-03, /03L-0:on 810204,during Charcoal Testing,Filter Sys AHFL-2D Methyl Iodide Removal Efficiency Was 92.14%. Caused by Atmospheric Pollutants & Normal Air Flow.Charcoal Cells Replaced W/New Impregnated Charcoal | /03L-0:on 810204,during Charcoal Testing,Filter Sys AHFL-2D Methyl Iodide Removal Efficiency Was 92.14%. Caused by Atmospheric Pollutants & Normal Air Flow.Charcoal Cells Replaced W/New Impregnated Charcoal | |
| 05000302/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000302/LER-1981-009-03, /03L-0:on 810209,RCS Drain Tank Level Indication Was Erratic & Prevented Leak Rate Surveillance.Caused by Vapor Condensation in Instrument Sensing Lines.Lines Blown Down | /03L-0:on 810209,RCS Drain Tank Level Indication Was Erratic & Prevented Leak Rate Surveillance.Caused by Vapor Condensation in Instrument Sensing Lines.Lines Blown Down | |
| 05000302/LER-1981-010-03, /03L-0:on 810217,after Routine Shutdown,Rcs Sampling Revealed That Dose Equivalent I-131 Exceeded Tech Specs.Caused by Leaking Fuel & Anticipated Dose Equivalent Iodine Transient.Purification Flow Increased | /03L-0:on 810217,after Routine Shutdown,Rcs Sampling Revealed That Dose Equivalent I-131 Exceeded Tech Specs.Caused by Leaking Fuel & Anticipated Dose Equivalent Iodine Transient.Purification Flow Increased | |
| 05000302/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000302/LER-1981-011, Forwards LER 81-011/01T-1 | Forwards LER 81-011/01T-1 | |
| 05000302/LER-1981-011-01, /01T-1:on 810306,containment Isolation Valves CAV-1,3,4,5 & 126 Found Incapable of Meeting Environ Qualification During Evaluation of IE Bulletin 79-01B.Caused by Potential Electrical Short Due to Flooding After LOCA | /01T-1:on 810306,containment Isolation Valves CAV-1,3,4,5 & 126 Found Incapable of Meeting Environ Qualification During Evaluation of IE Bulletin 79-01B.Caused by Potential Electrical Short Due to Flooding After LOCA | |
| 05000302/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000302/LER-1981-012-03, /03L-0:on 810219,Limitorque-operated Containment Isolation Valves MUV-260 & 261 Failed to Close.Cause Unknown.Torque Switch MUV-261 Replaced & Operability Restored on 810224.Investigation Continuing | /03L-0:on 810219,Limitorque-operated Containment Isolation Valves MUV-260 & 261 Failed to Close.Cause Unknown.Torque Switch MUV-261 Replaced & Operability Restored on 810224.Investigation Continuing | |
| 05000302/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | |
| 05000302/LER-1981-013-03, /03L-0:on 810302,during Routine Testing in Mode 5 Operation,Rcs Discovered W/Chloride Concentration of 0.18 Ppm.Caused by Release of Chlorides from Makeup. Procedures Will Be Revised by 810430 | /03L-0:on 810302,during Routine Testing in Mode 5 Operation,Rcs Discovered W/Chloride Concentration of 0.18 Ppm.Caused by Release of Chlorides from Makeup. Procedures Will Be Revised by 810430 | |
| 05000302/LER-1981-014-03, /03L-0:on 810301,Clark Relay Model 5UK6-3 in Reactor Bldg Isolation Channel B,Group 2,failed to Actuate When Coil Was de-energized During SP-130.Caused by Burr on Relay Shaft.Relay Replaced | /03L-0:on 810301,Clark Relay Model 5UK6-3 in Reactor Bldg Isolation Channel B,Group 2,failed to Actuate When Coil Was de-energized During SP-130.Caused by Burr on Relay Shaft.Relay Replaced | |
| 05000302/LER-1981-014, Forwards LER 81-014/03L-0 | Forwards LER 81-014/03L-0 | |
| 05000302/LER-1981-015, Forwards LER 81-015/03L-0 | Forwards LER 81-015/03L-0 | |
| 05000302/LER-1981-015-03, /03L-0:on 810301,Agastat Relay Model 3722B12C in Engineered Safeguards High Pressure Injection Actuation Channel B,Group 3 Block 4,failed to Change State After Receiving Signal During SP-130.Caused by Defective Relay | /03L-0:on 810301,Agastat Relay Model 3722B12C in Engineered Safeguards High Pressure Injection Actuation Channel B,Group 3 Block 4,failed to Change State After Receiving Signal During SP-130.Caused by Defective Relay | |
| 05000302/LER-1981-016-03, /03L-0:on 810304,breaker for DHV-110,decay Heat Pump a Discharge Throttle Valve Tripped.Cause Unknown. DHV-110 Repetitively Cycled W/No Failures | /03L-0:on 810304,breaker for DHV-110,decay Heat Pump a Discharge Throttle Valve Tripped.Cause Unknown. DHV-110 Repetitively Cycled W/No Failures | |
| 05000302/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000302/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl | Forwards LER 81-017/03L-0.Detailed Event Analysis Encl | |
| 05000302/LER-1981-017-03, /03L-0:on 810304,during Testing,Discovered That Containment Isolation Valve CFV-16 Would Not Move from mid-position.Caused by Valve Binding on Bushing Due to Insufficient Lubrication | /03L-0:on 810304,during Testing,Discovered That Containment Isolation Valve CFV-16 Would Not Move from mid-position.Caused by Valve Binding on Bushing Due to Insufficient Lubrication | |
| 05000302/LER-1981-018, Forwards LER 81-018/03L-0 | Forwards LER 81-018/03L-0 | |
| 05000302/LER-1981-018-03, /03L-0:on 810313,Gow Mac 20-250 Dihydrogen Analyzer Failed Calibr During Surveillance Program SP-708. Caused by Defective thermo-conductivity Cell.Cell Replaced & Instrument Calibr & Restored on 810316 | /03L-0:on 810313,Gow Mac 20-250 Dihydrogen Analyzer Failed Calibr During Surveillance Program SP-708. Caused by Defective thermo-conductivity Cell.Cell Replaced & Instrument Calibr & Restored on 810316 | |
| 05000302/LER-1981-019-03, /03L-0:on 810313,during Normal operation,RC3,RC6 & RB3 Relays Tripped in Emergency Safeguards Actuation Channel B.Cause Attributed to Failed Hamlin Relay.Maint Revealed Addl Faulty Relays.Hamlin Replaced W/Cryden Relays | /03L-0:on 810313,during Normal operation,RC3,RC6 & RB3 Relays Tripped in Emergency Safeguards Actuation Channel B.Cause Attributed to Failed Hamlin Relay.Maint Revealed Addl Faulty Relays.Hamlin Replaced W/Cryden Relays | |
| 05000302/LER-1981-019, Forwards LER 81-019/03L-0 | Forwards LER 81-019/03L-0 | |
| 05000302/LER-1981-020-03, /03L-0:on 810405,during Performance of Engineered Safeguards Monthly Functional Tests,Discovered That Subsystem a Low Power Injection Channel RC-4 Would Not Reset W/Reset Permissive.Caused by Failed mercury-wetted Relay | /03L-0:on 810405,during Performance of Engineered Safeguards Monthly Functional Tests,Discovered That Subsystem a Low Power Injection Channel RC-4 Would Not Reset W/Reset Permissive.Caused by Failed mercury-wetted Relay | |
| 05000302/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000302/LER-1981-021, Forwards LER 81-021/03L-0 | Forwards LER 81-021/03L-0 | |
| 05000302/LER-1981-021-03, /03L-0:on 810411,failure of Inverter D Resulted in Loss of Vital Bus VBDP-6.Caused by Shorted Diode & Blown Fuse Which May Have Resulted from Overheating in Inverter Cabinet.Diode & Fuse Replaced & Mod Procedure Revised | /03L-0:on 810411,failure of Inverter D Resulted in Loss of Vital Bus VBDP-6.Caused by Shorted Diode & Blown Fuse Which May Have Resulted from Overheating in Inverter Cabinet.Diode & Fuse Replaced & Mod Procedure Revised | |
| 05000302/LER-1981-022-03, /03L-0:on 810412,following Reactor Trip,Main Steam Isolation Valve Msv Found Inoperable.Cause Undetermined.Mods Performed to Improve Valve Operation & Reliability. Functional Test Results Satisfactory.Operability Restored | /03L-0:on 810412,following Reactor Trip,Main Steam Isolation Valve Msv Found Inoperable.Cause Undetermined.Mods Performed to Improve Valve Operation & Reliability. Functional Test Results Satisfactory.Operability Restored | |
| 05000302/LER-1981-022, Forwards LER 81-022/03L-0 | Forwards LER 81-022/03L-0 | |
| 05000302/LER-1981-023, Forwards LER 81-023/03L-0 | Forwards LER 81-023/03L-0 | |
| 05000302/LER-1981-023-03, /03L-0:on 810412,atmospheric Radiation Monitor RM-A5 Failed Due to Seized Sample Vacuum Pump.Caused by Worn Carbon Vanes.Pump Replaced.Engineering Evaluation in Progress.Supplementary Info Sheet Encl | /03L-0:on 810412,atmospheric Radiation Monitor RM-A5 Failed Due to Seized Sample Vacuum Pump.Caused by Worn Carbon Vanes.Pump Replaced.Engineering Evaluation in Progress.Supplementary Info Sheet Encl | |
| 05000302/LER-1981-024-03, /03L-0:on 810414,emergency Diesel Generator 1A Found Inoperable During Monthly Test SP-354.Caused by Plugged Oil Separator in Air Ejector Train.Procedure Being Revised to Increase Cleaning & Insp Frequency | /03L-0:on 810414,emergency Diesel Generator 1A Found Inoperable During Monthly Test SP-354.Caused by Plugged Oil Separator in Air Ejector Train.Procedure Being Revised to Increase Cleaning & Insp Frequency | |
| 05000302/LER-1981-024, Forwards LER 81-024/03L-0 | Forwards LER 81-024/03L-0 | |
| 05000302/LER-1981-025-03, /03L-0:on 810417,EFP-2 Control Switch Discovered in Off Position.Caused by Procedural Deficiencies.Procedures Modified to Require Assurance That EFP-2 Is Selected to Auto | /03L-0:on 810417,EFP-2 Control Switch Discovered in Off Position.Caused by Procedural Deficiencies.Procedures Modified to Require Assurance That EFP-2 Is Selected to Auto | |
| 05000302/LER-1981-025, Forwards LER 81-025/03L-0 | Forwards LER 81-025/03L-0 | |