| | | Reporting criterion |
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| 05000335/LER-1981-001-03, /03L-0:on 810116,four Missing Fire Barriers Noted in Reactor Auxiliary Bldg.Caused by Insufficient Control of Fire Barrier Work by Backfit Personnel.Fire Watch Patrol Posted Immediately & Deficient Barriers Replaced | /03L-0:on 810116,four Missing Fire Barriers Noted in Reactor Auxiliary Bldg.Caused by Insufficient Control of Fire Barrier Work by Backfit Personnel.Fire Watch Patrol Posted Immediately & Deficient Barriers Replaced | |
| 05000335/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | |
| 05000335/LER-1981-002-03, /03L-0:on 810122,digital Data Processing Sys Computer Dropped off-line,resulting in Loss of Control Element Assembly Pulse Counting Backup Position Indication. Caused by Software Problem.Problem Under Investigation | /03L-0:on 810122,digital Data Processing Sys Computer Dropped off-line,resulting in Loss of Control Element Assembly Pulse Counting Backup Position Indication. Caused by Software Problem.Problem Under Investigation | |
| 05000335/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | |
| 05000335/LER-1981-003-01, /01T-0:on 810123,during Full Power Operation,Plant Masonry Wall re-evaluation Showed Missing Clip Angles & Clip Angle Reinforcements,Contrary to IE Bulletin 80-11 Criteria. Caused by Design Error.Mods to Wall Completed by 81 | /01T-0:on 810123,during Full Power Operation,Plant Masonry Wall re-evaluation Showed Missing Clip Angles & Clip Angle Reinforcements,Contrary to IE Bulletin 80-11 Criteria. Caused by Design Error.Mods to Wall Completed by 810205 | |
| 05000335/LER-1981-003, Forwards LER 81-003/09X-1 | Forwards LER 81-003/09X-1 | |
| 05000335/LER-1981-003-09, /09X-1:on 810123,several Plant Masonry Walls Did Not Meet IE Bulletin 80-11 Criteria.Caused by Design Problems.Mods Completed by 810205 | /09X-1:on 810123,several Plant Masonry Walls Did Not Meet IE Bulletin 80-11 Criteria.Caused by Design Problems.Mods Completed by 810205 | |
| 05000335/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000335/LER-1981-004-03, /03L-0:on 810126,switch Yard Oil Circuit Breaker Ocb 4E Tripped on Differential Current.Probably Caused by Differential Current Relay.Breaker Closed | /03L-0:on 810126,switch Yard Oil Circuit Breaker Ocb 4E Tripped on Differential Current.Probably Caused by Differential Current Relay.Breaker Closed | |
| 05000335/LER-1981-005, Forwards LER 81-005/09T-0 | Forwards LER 81-005/09T-0 | |
| 05000335/LER-1981-005-09, /09T-0:on 810127,notification Received from GE That Type Hfa Relay Coil Spools Could Crack & Fail Preventing Relay Operation.Cause Unknown.Relays to Be Replaced Per GE Recommendation | /09T-0:on 810127,notification Received from GE That Type Hfa Relay Coil Spools Could Crack & Fail Preventing Relay Operation.Cause Unknown.Relays to Be Replaced Per GE Recommendation | |
| 05000335/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | |
| 05000335/LER-1981-006-03, /03L-0:on 810129,QC Insp Showed That Visual Insp of Debris Not Documented During Containment Surveillance Entries on Standing Radiation Work Permits.Caused by Lack of Signoff Space.Attachment Will Be Added | /03L-0:on 810129,QC Insp Showed That Visual Insp of Debris Not Documented During Containment Surveillance Entries on Standing Radiation Work Permits.Caused by Lack of Signoff Space.Attachment Will Be Added | |
| 05000335/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | |
| 05000335/LER-1981-007-03, /03L-0:on 810131,DDPS Computer Dropped Off Line Causing Loss of Cambridge Electron Accelerator Pulse Counting Backup Position Indication.Cause Software Related. Computer Placed on Line & Indication Restored | /03L-0:on 810131,DDPS Computer Dropped Off Line Causing Loss of Cambridge Electron Accelerator Pulse Counting Backup Position Indication.Cause Software Related. Computer Placed on Line & Indication Restored | |
| 05000335/LER-1981-008-03, /03L-0:on 810202,digital Data Processing Sys Dropped Off Line Resulting in Loss of Control Element Assembly Pulse Counting Backup Position Indication.Caused by software-related Problems.Investigation Continuing | /03L-0:on 810202,digital Data Processing Sys Dropped Off Line Resulting in Loss of Control Element Assembly Pulse Counting Backup Position Indication.Caused by software-related Problems.Investigation Continuing | |
| 05000335/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000335/LER-1981-009-03, /03L-0:on 810214,primary Digital Data Processing Sys Line Printer Experienced Intermittent Operation Over 16-h.Caused by Line Printer Dampener Failure.Dampener Replaced & Line Printer Returned to Svc | /03L-0:on 810214,primary Digital Data Processing Sys Line Printer Experienced Intermittent Operation Over 16-h.Caused by Line Printer Dampener Failure.Dampener Replaced & Line Printer Returned to Svc | |
| 05000335/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000335/LER-1981-010-03, /03L-0:on 810225,inlet Damper to Filters Moved in Open Direction During Testing to Determine If Control Room & Technical Support Ctr Could Be Pressurized W/Makeup Per Tech Spec.Caused by Personnel Error.Flow Adjusted | /03L-0:on 810225,inlet Damper to Filters Moved in Open Direction During Testing to Determine If Control Room & Technical Support Ctr Could Be Pressurized W/Makeup Per Tech Spec.Caused by Personnel Error.Flow Adjusted | |
| 05000335/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | |
| 05000335/LER-1981-011-03, /03L-0:on 810226,containment Radiation Monitor Channel a Setpoint Exceeded Tech Spec Limits.Caused by Trip Bistable Setpoint Drift.Setpoint Readjusted | /03L-0:on 810226,containment Radiation Monitor Channel a Setpoint Exceeded Tech Spec Limits.Caused by Trip Bistable Setpoint Drift.Setpoint Readjusted | |
| 05000335/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | |
| 05000335/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | |
| 05000335/LER-1981-012-03, /03L-0:on 810221-28,one of Two Chlorine Detectors in North Control Room Air Intake Failed Several Times. Apparently Caused by Loose Connection on Reset Button.Button Replaced | /03L-0:on 810221-28,one of Two Chlorine Detectors in North Control Room Air Intake Failed Several Times. Apparently Caused by Loose Connection on Reset Button.Button Replaced | |
| 05000335/LER-1981-013-03, /03L-0:on 810216,channel B Hot Leg Reactor Temp Detector Output for Loop 1B Failed Low.Caused by Blown Fuse in Temp Transmitter Power Supply,Fisher Porter Model 55GL1154.Power Supply Replaced & Tested | /03L-0:on 810216,channel B Hot Leg Reactor Temp Detector Output for Loop 1B Failed Low.Caused by Blown Fuse in Temp Transmitter Power Supply,Fisher Porter Model 55GL1154.Power Supply Replaced & Tested | |
| 05000335/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | |
| 05000335/LER-1981-014-03, /03L-0:on 810319,high Containment Radiation Monitoring Channel B for Containment Isolation Signal Failed Low.Caused by Faulty Power Supply Units in Control Room Display Module.Units Replaced | /03L-0:on 810319,high Containment Radiation Monitoring Channel B for Containment Isolation Signal Failed Low.Caused by Faulty Power Supply Units in Control Room Display Module.Units Replaced | |
| 05000335/LER-1981-014, Forwards LER 81-014/03L-0 | Forwards LER 81-014/03L-0 | |
| 05000335/LER-1981-015-03, /03L-0:on 810323,acoustic Flow Position Indicator Was Found to Be Inoperable During Routine Surveillance. Probably Caused by Transducer or Associated Cable.Spare Transducer & Cable Installed | /03L-0:on 810323,acoustic Flow Position Indicator Was Found to Be Inoperable During Routine Surveillance. Probably Caused by Transducer or Associated Cable.Spare Transducer & Cable Installed | |
| 05000335/LER-1981-015, Forwards LER 81-015/03L-0 | Forwards LER 81-015/03L-0 | |
| 05000335/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000335/LER-1981-016-03, /03L-0:on 810407,during Routine Surveillance Testing,Rwt Outlet Valve MV-07-1A Failed to Reopen Electrically.Caused by Faulty Mechanical Stop Mechanism. Mechanism Was Repaired & Checked Satisfactorily | /03L-0:on 810407,during Routine Surveillance Testing,Rwt Outlet Valve MV-07-1A Failed to Reopen Electrically.Caused by Faulty Mechanical Stop Mechanism. Mechanism Was Repaired & Checked Satisfactorily | |
| 05000335/LER-1981-017-03, /03L-0:on 810417,during Cold Shutdown, Surveillance Stroke Times for HCV 14-1,2,6 & 7 Were Out of Spec.Caused by Approved Mod to Valves to Facilitate Opening in Emergency.Minor Design Change Performed | /03L-0:on 810417,during Cold Shutdown, Surveillance Stroke Times for HCV 14-1,2,6 & 7 Were Out of Spec.Caused by Approved Mod to Valves to Facilitate Opening in Emergency.Minor Design Change Performed | |
| 05000335/LER-1981-017, Forwards LER 81-017/03L-0 | Forwards LER 81-017/03L-0 | |
| 05000335/LER-1981-018, Forwards LER 81-018/03L-0 | Forwards LER 81-018/03L-0 | |
| 05000335/LER-1981-018-03, /03L-0:on 810416,after Reactor Trip Due to Transformer Failure,Block Valve VL403 for Power Operated Relief Valve Would Not Close.Possibly Caused by Tight Adjustment to Packing Gland | /03L-0:on 810416,after Reactor Trip Due to Transformer Failure,Block Valve VL403 for Power Operated Relief Valve Would Not Close.Possibly Caused by Tight Adjustment to Packing Gland | |
| 05000335/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000335/LER-1981-020-03, /03L-0:on 810422,control Element Assembly 66 Dropped to Full Insertion.Cause Unknown.Coil Power Programmer 15-volt Power Supply Replaced as Precaution | /03L-0:on 810422,control Element Assembly 66 Dropped to Full Insertion.Cause Unknown.Coil Power Programmer 15-volt Power Supply Replaced as Precaution | |
| 05000335/LER-1981-021, Forwards LER 81-021/03L-0 | Forwards LER 81-021/03L-0 | |
| 05000335/LER-1981-021-03, /03L-0:on 810424,during Normal Operation,Channel Mb Containment Pressure Detector Failed.Caused by Force Motor Burnout.Detector Replaced | /03L-0:on 810424,during Normal Operation,Channel Mb Containment Pressure Detector Failed.Caused by Force Motor Burnout.Detector Replaced | |
| 05000335/LER-1981-022, Forwards LER 81-022/03L-0 | Forwards LER 81-022/03L-0 | |
| 05000335/LER-1981-022-03, /03L-0:on 810421,during Power Ascension After Unit Outage,Containment Radiation Channel MD Failed Low.Cause Not Determined,Since Radiation Detector in High Radiation Field. New Detector Obtained for Replacement | /03L-0:on 810421,during Power Ascension After Unit Outage,Containment Radiation Channel MD Failed Low.Cause Not Determined,Since Radiation Detector in High Radiation Field. New Detector Obtained for Replacement | |
| 05000335/LER-1981-023, Forwards LER 81-023/03L-0 | Forwards LER 81-023/03L-0 | |
| 05000335/LER-1981-023-03, /03L-0:on 810501,isolation Valve HCV 14-9 Did Not Shut Fully.Caused by Shut Limit Switch Not Actuating from Remote Operation.Valve Lubricated | /03L-0:on 810501,isolation Valve HCV 14-9 Did Not Shut Fully.Caused by Shut Limit Switch Not Actuating from Remote Operation.Valve Lubricated | |
| 05000335/LER-1981-024, Forwards LER 81-024/03L-0 | Forwards LER 81-024/03L-0 | |
| 05000335/LER-1981-024-03, /03L-0:on 810514,while Operating at Full Power, Area Radiation Monitoring Sys Channel 7 Discovered to Have Alarm Set Point Greater than 15m/h.Cause Undetermined. Setpoint Returned to Correct Setting | /03L-0:on 810514,while Operating at Full Power, Area Radiation Monitoring Sys Channel 7 Discovered to Have Alarm Set Point Greater than 15m/h.Cause Undetermined. Setpoint Returned to Correct Setting | |
| 05000335/LER-1981-025-03, /03L-0:on 810430,during Reactor Protection Sys Logic Matrix Test While at 100% Power,Trip Unit Failed to Illuminate as Required.Caused by Bad Connection to Cabinet. Connector Cleaned.Unit Reinserted Into Sys Cabinet | /03L-0:on 810430,during Reactor Protection Sys Logic Matrix Test While at 100% Power,Trip Unit Failed to Illuminate as Required.Caused by Bad Connection to Cabinet. Connector Cleaned.Unit Reinserted Into Sys Cabinet | |
| 05000335/LER-1981-025, Forwards LER 81-025/03L-0 | Forwards LER 81-025/03L-0 | |
| 05000335/LER-1981-026-03, /03L-0:on 810529,during Full Power Control Element Assembly Exercising,Linear Reed Switch Position Indication for Control Element Assembly 30 Failed.Cause Undetermined. Investigation Planned During Next Outage | /03L-0:on 810529,during Full Power Control Element Assembly Exercising,Linear Reed Switch Position Indication for Control Element Assembly 30 Failed.Cause Undetermined. Investigation Planned During Next Outage | |
