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| 05000255/LER-1981-001-01, /01T-0:on 810106,output Breakers of Batteries Were Inadvertently Opened for 1-h.Caused by Misalignment Due to Personnel Failure to Follow procedure.Safety-related Surveillance & Maint Procedures Reviewed Prior to Use | /01T-0:on 810106,output Breakers of Batteries Were Inadvertently Opened for 1-h.Caused by Misalignment Due to Personnel Failure to Follow procedure.Safety-related Surveillance & Maint Procedures Reviewed Prior to Use | |
| 05000255/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | |
| 05000255/LER-1981-002-03, Determined That 125 Volt DC Distribution Panel D21A Mounting Did Not Meet Seismic Restraint Criteria.Caused by Engineering Judgment Error. Frame Holding Panel Modified by Adding Braces | Determined That 125 Volt DC Distribution Panel D21A Mounting Did Not Meet Seismic Restraint Criteria.Caused by Engineering Judgment Error. Frame Holding Panel Modified by Adding Braces | |
| 05000255/LER-1981-002, Forwards Updated LER 81-002/03L-1 | Forwards Updated LER 81-002/03L-1 | |
| 05000255/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000255/LER-1981-003-03, /03L-0:on 810107,HPSI Motor Operated Valve MOV-3011 Failed to Open Upon Initiation of Test Signal. Caused by Dirty Contacts in DBA Sequencer 34-3.Contacts Cleaned & Proper Valve Operation Restored | /03L-0:on 810107,HPSI Motor Operated Valve MOV-3011 Failed to Open Upon Initiation of Test Signal. Caused by Dirty Contacts in DBA Sequencer 34-3.Contacts Cleaned & Proper Valve Operation Restored | |
| 05000255/LER-1981-004-01, /01T-0:on 810128,during Evaluation of Masonry Walls Per IE Bulletin 80-11,28 Walls Did Not Meet Acceptance Criteria.Caused by Changes in Acceptance Criteria.Corrective Methods Being Developed | /01T-0:on 810128,during Evaluation of Masonry Walls Per IE Bulletin 80-11,28 Walls Did Not Meet Acceptance Criteria.Caused by Changes in Acceptance Criteria.Corrective Methods Being Developed | |
| 05000255/LER-1981-004, Forwards LER 81-004/01T-0 | Forwards LER 81-004/01T-0 | |
| 05000255/LER-1981-005-01, /01L-0:on 810121,copper Tubing to 1-2 Diesel Generator Svc Water Low Pressure Alarm PS-1473 Broke.Caused by Workman Accidentally Bumping Tubing.Workman Cautioned Re Handling of safety-related Equipment | /01L-0:on 810121,copper Tubing to 1-2 Diesel Generator Svc Water Low Pressure Alarm PS-1473 Broke.Caused by Workman Accidentally Bumping Tubing.Workman Cautioned Re Handling of safety-related Equipment | |
| 05000255/LER-1981-005, Forwards LER 81-005/01L-0 | Forwards LER 81-005/01L-0 | |
| 05000255/LER-1981-006-03, /03L-0:on 810119,drain Valve,Mv 504 Fps,In Southwest Cable Penetration Room Fire Sprinkler Supply Line Failed.Caused by Bonnet Separating from Valve Body Due to Overtightening.Valve Replaced | /03L-0:on 810119,drain Valve,Mv 504 Fps,In Southwest Cable Penetration Room Fire Sprinkler Supply Line Failed.Caused by Bonnet Separating from Valve Body Due to Overtightening.Valve Replaced | |
| 05000255/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000255/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000255/LER-1981-007-03, /03L-0:on 810122,overspeed Trip Device for Turbine Driven Auxiliary Feedwater Pump Found in Tripped Condition. Caused by Accidental Bumping of Overspeed Trip Due to Moving of Gas Bottles Into Auxiliary Feedwater Pump Room | /03L-0:on 810122,overspeed Trip Device for Turbine Driven Auxiliary Feedwater Pump Found in Tripped Condition. Caused by Accidental Bumping of Overspeed Trip Due to Moving of Gas Bottles Into Auxiliary Feedwater Pump Room | |
| 05000255/LER-1981-008-03, /03L-0:on 810124,component Cooling Water Pump P-52C Motor Caught on Fire.Caused by Motor Bearing Failure Due to Oil Loss.Motor Replaced | /03L-0:on 810124,component Cooling Water Pump P-52C Motor Caught on Fire.Caused by Motor Bearing Failure Due to Oil Loss.Motor Replaced | |
| 05000255/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000255/LER-1981-009-03, /03L-0:on 810115,power Conversion Sys Sample Revealed Dose Equivalent I-131 to Be in Excess of Tech Spec. Caused by Low Level Cladding Failure Combined W/Transient Conditions Following Plant Trip | /03L-0:on 810115,power Conversion Sys Sample Revealed Dose Equivalent I-131 to Be in Excess of Tech Spec. Caused by Low Level Cladding Failure Combined W/Transient Conditions Following Plant Trip | |
| 05000255/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000255/LER-1981-010-03, /03L-0:on 810205,primary Indicating Position Datalogger Became Inoperable.Caused by Failure of mercury- Wetted Relay in Gain Selection Portion of Input Amplifier of A/D Converter.Relay Replaced | /03L-0:on 810205,primary Indicating Position Datalogger Became Inoperable.Caused by Failure of mercury- Wetted Relay in Gain Selection Portion of Input Amplifier of A/D Converter.Relay Replaced | |
| 05000255/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000255/LER-1981-011-03, /03L-0:on 810304,diesel Generator 1-1 Overspeed & Low Air Pressure Alarms Actuated & Would Not Reset After 16 Cylinder Leak Test.Caused by Broken micro-switch Due to High Impact Resulting from Improper Use of Trip Lever | /03L-0:on 810304,diesel Generator 1-1 Overspeed & Low Air Pressure Alarms Actuated & Would Not Reset After 16 Cylinder Leak Test.Caused by Broken micro-switch Due to High Impact Resulting from Improper Use of Trip Lever | |
| 05000255/LER-1981-012, Forwards LER 81-012/01T-0 | Forwards LER 81-012/01T-0 | |
| 05000255/LER-1981-012-01, /01T-0:on 810331,safety Injection Tank T-82A Level Decreased Below Requirements.Caused by Leaking Safety Injection Control Valve PCV-3042.Valve Will Be Repaired | /01T-0:on 810331,safety Injection Tank T-82A Level Decreased Below Requirements.Caused by Leaking Safety Injection Control Valve PCV-3042.Valve Will Be Repaired | |
| 05000255/LER-1981-014-03, /03L-0:on 810402,during Normal Operation,Water Level in Safety Injection Tank T-82B Exceeded High Level Limit.Caused by Inleakage from Primary Coolant Sys & Drift in Narrow Range Amplifier.Alarm Setpoint Adjusted | /03L-0:on 810402,during Normal Operation,Water Level in Safety Injection Tank T-82B Exceeded High Level Limit.Caused by Inleakage from Primary Coolant Sys & Drift in Narrow Range Amplifier.Alarm Setpoint Adjusted | |
| 05000255/LER-1981-014, Forwards LER 81-014/03L-0 | Forwards LER 81-014/03L-0 | |
| 05000255/LER-1981-015, Forwards LER 81-015/03L-0 | Forwards LER 81-015/03L-0 | |
| 05000255/LER-1981-015-03, /03L-0:on 810414,routine Chemistry Sampling of Safety Injection Tanks Revealed Boron Concentration of SIT T-82B to Be 1671 Ppm.Cause of Low Boron Concentration Due to Dilution Resulting from PCS Leakage | /03L-0:on 810414,routine Chemistry Sampling of Safety Injection Tanks Revealed Boron Concentration of SIT T-82B to Be 1671 Ppm.Cause of Low Boron Concentration Due to Dilution Resulting from PCS Leakage | |
| 05000255/LER-1981-016-03, /03L-0:on 810421,during Normal Power Operation, Primary & Secondary Data Loggers Failed Due to Faulty Circuit Board & Typer Respectively.Replacement of Plant Sys Equipment Under Evaluation | /03L-0:on 810421,during Normal Power Operation, Primary & Secondary Data Loggers Failed Due to Faulty Circuit Board & Typer Respectively.Replacement of Plant Sys Equipment Under Evaluation | |
| 05000255/LER-1981-017-03, /03L-0:on 810501,during post-const Review of as-built Drawings,Determined That Pipe Supports Were Not Installed in Specified Locations,Resulting in Indeterminate Seismic Restraint Capability.Caused by Installation Error | /03L-0:on 810501,during post-const Review of as-built Drawings,Determined That Pipe Supports Were Not Installed in Specified Locations,Resulting in Indeterminate Seismic Restraint Capability.Caused by Installation Error | |
| 05000255/LER-1981-017, Forwards LER 81-017/03L-0 | Forwards LER 81-017/03L-0 | |
| 05000255/LER-1981-018, Forwards LER 81-018/03L-0 | Forwards LER 81-018/03L-0 | |
| 05000255/LER-1981-018-03, /03L-0:on 810509,snubber 40 (LPSI Pump Suction) Discovered Leaking Oil.Possibly Caused by O-ring Failure. Snubber Replaced.Investigation Continuing | /03L-0:on 810509,snubber 40 (LPSI Pump Suction) Discovered Leaking Oil.Possibly Caused by O-ring Failure. Snubber Replaced.Investigation Continuing | |
| 05000255/LER-1981-019, Forwards LER 81-019/01T-0 | Forwards LER 81-019/01T-0 | |
| 05000255/LER-1981-019-01, /01T-0:on 810528,during Fuel Vendor Review,Three Radial Peaking Factor Limits Were 1% Nonconservative During Current Cycle.Caused by Vendor Errors in Fuel Cycle Calculations.Surveillance Limits Have Been Revised | /01T-0:on 810528,during Fuel Vendor Review,Three Radial Peaking Factor Limits Were 1% Nonconservative During Current Cycle.Caused by Vendor Errors in Fuel Cycle Calculations.Surveillance Limits Have Been Revised | |
| 05000255/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000255/LER-1981-020-03, /03L-0:on 810522,during Normal Operations,Daily PCS Leak Rate Calculation Results Indicated Unidentified Leakage.Leak Isolated in Packing on Auxiliary Spray Stop Valve.Caused by Packing Degradation | /03L-0:on 810522,during Normal Operations,Daily PCS Leak Rate Calculation Results Indicated Unidentified Leakage.Leak Isolated in Packing on Auxiliary Spray Stop Valve.Caused by Packing Degradation | |
| 05000255/LER-1981-021-03, /03L-0:on 810527,alarms Would Not Reset Following Routine Test of Annunciator Panels.Caused by Relay Coil Failure.Relay Repaired | /03L-0:on 810527,alarms Would Not Reset Following Routine Test of Annunciator Panels.Caused by Relay Coil Failure.Relay Repaired | |
| 05000255/LER-1981-021, Forwards LER 81-021/03L-0 | Forwards LER 81-021/03L-0 | |
| 05000255/LER-1981-022-03, /03L-0:on 810531,pump Suction Snubber 43 Found Leaking Oil.Caused by Apparent O-ring Failure.Snubber Disassembled | /03L-0:on 810531,pump Suction Snubber 43 Found Leaking Oil.Caused by Apparent O-ring Failure.Snubber Disassembled | |
| 05000255/LER-1981-022, Forwards LER 81-022/03L-0 | Forwards LER 81-022/03L-0 | |
| 05000255/LER-1981-023, Forwards LER 81-023/03L-0 | Forwards LER 81-023/03L-0 | |
| 05000255/LER-1981-023-03, /03L-0:on 810602,during Testing,Diesel Generator 1-1 Unable to Maintain Constant Load.Caused by Generator Droop Setting Being Out of Adjustment.Droop Adjusted | /03L-0:on 810602,during Testing,Diesel Generator 1-1 Unable to Maintain Constant Load.Caused by Generator Droop Setting Being Out of Adjustment.Droop Adjusted | |
| 05000255/LER-1981-024, Forwards LER 81-024/03L-0 | Forwards LER 81-024/03L-0 | |
| 05000255/LER-1981-024-03, /03L-0:on 810606,diesel Generator 1-1 Valve CV- 0884 Observed Passing Full Flow W/Actuator in Closed Position.Caused by Sheared Operator to Valve Shaft Key Due to Damaged Liner Permitting Misalignment of Shaft & Disc | /03L-0:on 810606,diesel Generator 1-1 Valve CV- 0884 Observed Passing Full Flow W/Actuator in Closed Position.Caused by Sheared Operator to Valve Shaft Key Due to Damaged Liner Permitting Misalignment of Shaft & Disc | |
| 05000255/LER-1981-025, Forwards LER 81-025/01T-0 | Forwards LER 81-025/01T-0 | |
| 05000255/LER-1981-025-01, /01T-0:on 810626,shutdown Sequencers 34-5 & 34-6 Failed During Testing.Caused by Sticking Clutch & Dirty Contacts.Clutch Cleaned & Lubricated.Contacts Cleaned | /01T-0:on 810626,shutdown Sequencers 34-5 & 34-6 Failed During Testing.Caused by Sticking Clutch & Dirty Contacts.Clutch Cleaned & Lubricated.Contacts Cleaned | |
| 05000255/LER-1981-026, Forwards LER 81-026/03L-0 | Forwards LER 81-026/03L-0 | |
| 05000255/LER-1981-026-03, /03L-0:on 810626,during Diesel Generator 1-1 Test Startup,Engine Failed to Reach Rated Speed.Caused by Motor Failure in Potentiometer in Engine Speed Control Circuit. Motor Replaced | /03L-0:on 810626,during Diesel Generator 1-1 Test Startup,Engine Failed to Reach Rated Speed.Caused by Motor Failure in Potentiometer in Engine Speed Control Circuit. Motor Replaced | |
| 05000255/LER-1981-027, Forwards Updated LER 81-027/03X-1 | Forwards Updated LER 81-027/03X-1 | |
| 05000255/LER-1981-027-03, During Sampling of Iodine Removal Sys Tank T-102,hydrazene Concentration Found Exceeding Tech Spec.Caused by Improper Dilution Due to Vague Procedural Requirements.Procedure Revised | During Sampling of Iodine Removal Sys Tank T-102,hydrazene Concentration Found Exceeding Tech Spec.Caused by Improper Dilution Due to Vague Procedural Requirements.Procedure Revised | |
