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| 05000334/LER-1981-001-01, /01P-0:on 810106,IE Bulletin 79-14 Evaluation & Reanalysis of Piping & Supports Revealed H-162,H-164 & H-166 to Be Less Conservative than Original Design.Caused by QA Breakdown | /01P-0:on 810106,IE Bulletin 79-14 Evaluation & Reanalysis of Piping & Supports Revealed H-162,H-164 & H-166 to Be Less Conservative than Original Design.Caused by QA Breakdown | |
| 05000334/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | |
| 05000334/LER-1981-002, Forwards LER 81-002/01T-0 | Forwards LER 81-002/01T-0 | |
| 05000334/LER-1981-002-01, /01T-0:on 810107,during Shutdown,Seal Flow Dropped Below Min on 1C Reactor Coolant Pump.Caused by Sensitive Valving.Pump Restarted within 20 Minutes | /01T-0:on 810107,during Shutdown,Seal Flow Dropped Below Min on 1C Reactor Coolant Pump.Caused by Sensitive Valving.Pump Restarted within 20 Minutes | |
| 05000334/LER-1981-003-03, /03L-0:on 810102,containment Outer Airlock Door Failed Seal Leakage Surveillance Test.Cause Not Stated. Seals Cleaned,Greased & Realigned.Airlock Returned to Svc | /03L-0:on 810102,containment Outer Airlock Door Failed Seal Leakage Surveillance Test.Cause Not Stated. Seals Cleaned,Greased & Realigned.Airlock Returned to Svc | |
| 05000334/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | |
| 05000334/LER-1981-004-03, /03L-0:on 810106,air Flow Calculations on Control Room Emergency Supply Fans Indicated Flow Rates in Excess of Tech Specs.Cause Not Stated.Adjustment Made to Supply Fans Inlet Damper | /03L-0:on 810106,air Flow Calculations on Control Room Emergency Supply Fans Indicated Flow Rates in Excess of Tech Specs.Cause Not Stated.Adjustment Made to Supply Fans Inlet Damper | |
| 05000334/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | |
| 05000334/LER-1981-005-03, /03L-0:on 810107,101A & 101B Detectors Electrolyte Discovered Not Dripping.Cause Not Stated.Wicks Replaced & Orifices Cleaned.Engineering Requested to Evaluate Sys | /03L-0:on 810107,101A & 101B Detectors Electrolyte Discovered Not Dripping.Cause Not Stated.Wicks Replaced & Orifices Cleaned.Engineering Requested to Evaluate Sys | |
| 05000334/LER-1981-006, Forwards Updated LER 81-006/03X-1.Detailed Event Analysis Encl | Forwards Updated LER 81-006/03X-1.Detailed Event Analysis Encl | |
| 05000334/LER-1981-006-03, During Surveillance Tests on Low Head Safety Injection Pumps,Water in Recirculation Line on Refueling Water Storage Tank Found Frozen.Caused by Heat Trace Circuit Thermostat Line in Off Position | During Surveillance Tests on Low Head Safety Injection Pumps,Water in Recirculation Line on Refueling Water Storage Tank Found Frozen.Caused by Heat Trace Circuit Thermostat Line in Off Position | |
| 05000334/LER-1981-007-03, /03L-0:on 810114,101A & 101B Detectors Electrolyte Discovered Not Dripping.Cause Not Stated.Wicks Replaced & Orifices Cleaned.Engineering Requested to Evaluate Sys | /03L-0:on 810114,101A & 101B Detectors Electrolyte Discovered Not Dripping.Cause Not Stated.Wicks Replaced & Orifices Cleaned.Engineering Requested to Evaluate Sys | |
| 05000334/LER-1981-008-03, /03L-0:on 810112,low Pressure Alarm Received on Safety Injection Accumulator SI-TK-1C.Caused by Leaking Drain Valve.Pressure Restored Above Tech Spec Limit & Valves Will Be Repaired or Replaced During Next Outage | /03L-0:on 810112,low Pressure Alarm Received on Safety Injection Accumulator SI-TK-1C.Caused by Leaking Drain Valve.Pressure Restored Above Tech Spec Limit & Valves Will Be Repaired or Replaced During Next Outage | |
| 05000334/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | |
| 05000334/LER-1981-009-03, /03L-0:on 810117,MOV-SI-864B Containment Isolation Valve Stroked Shut But Failed to Reopen During Surveillance Test.Caused by Valve Open Torque Cutout Switch Being Out of Adjustment.Switch Adjusted & Returned to Svc | /03L-0:on 810117,MOV-SI-864B Containment Isolation Valve Stroked Shut But Failed to Reopen During Surveillance Test.Caused by Valve Open Torque Cutout Switch Being Out of Adjustment.Switch Adjusted & Returned to Svc | |
| 05000334/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | |
| 05000334/LER-1981-010-03, /03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123 | /03L-0:on 810121,RCS Loop 1 Low Flow Channel 414 Annunciator Began Intermittently Flashing in Alarm.Caused by Low Voltage Input to Transmitter.Annunciator Adjusted & Channel Returned to Svc 810123 | |
| 05000334/LER-1981-011-03, /03L-0:on 810121,electrolyte Detectors 101A & B Found Not Dripping & 101C Detector Had Slow Drip Rate.Cause Under Investigation.Detectors Adjusted,Repaired & Declared Operable on 810129 | /03L-0:on 810121,electrolyte Detectors 101A & B Found Not Dripping & 101C Detector Had Slow Drip Rate.Cause Under Investigation.Detectors Adjusted,Repaired & Declared Operable on 810129 | |
| 05000334/LER-1981-012-03, /03L-0:on 810203,all Three Chlorine Detectors Failed Drip Rate Criteria.Cause Under Investigation. Detectors Repaired & Declared Operable 810204 | /03L-0:on 810203,all Three Chlorine Detectors Failed Drip Rate Criteria.Cause Under Investigation. Detectors Repaired & Declared Operable 810204 | |
| 05000334/LER-1981-013-03, /03L-0:on 810121,routine Lab Analysis Showed That Methyl Iodide Removal Efficiency for Bed Had Fallen Below Acceptable Level Resulting in Inoperability of Main Filter Bank 1A.Caused by Worn Out Charcoal Bed.Bank Repacked | /03L-0:on 810121,routine Lab Analysis Showed That Methyl Iodide Removal Efficiency for Bed Had Fallen Below Acceptable Level Resulting in Inoperability of Main Filter Bank 1A.Caused by Worn Out Charcoal Bed.Bank Repacked | |
| 05000334/LER-1981-014-01, /01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided | /01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided | |
| 05000334/LER-1981-014, Forwards LER 81-014/01T-0 | Forwards LER 81-014/01T-0 | |
| 05000334/LER-1981-015-03, /03L-0:on 810204,RCS Loop 1 Low Flow Annunciator Alarmed Intermittently.Flow Channel 414 Declared Inoperable & Bistable Tripped.Caused by Leaking Diaphragm.Diaphragm Replaced | /03L-0:on 810204,RCS Loop 1 Low Flow Annunciator Alarmed Intermittently.Flow Channel 414 Declared Inoperable & Bistable Tripped.Caused by Leaking Diaphragm.Diaphragm Replaced | |
| 05000334/LER-1981-015, Forwards LER 81-015/03L-0 | Forwards LER 81-015/03L-0 | |
| 05000334/LER-1981-016-03, /03L-0:on 810207,packing Leak Found in Steam Trap Isolation Valve.Caused by Valve Stem Packing Failure.Packing Rings Added | /03L-0:on 810207,packing Leak Found in Steam Trap Isolation Valve.Caused by Valve Stem Packing Failure.Packing Rings Added | |
| 05000334/LER-1981-016, Forwards LER 81-016/03L-0 | Forwards LER 81-016/03L-0 | |
| 05000334/LER-1981-017-03, /03L-0:on 810207,analog Rod Position Indicator Channels H2 & B8 & Associated Rods Were Declared Inoperable When Indications Exceeded Tech Spec.Caused by non-linearity in Indicator Calibr Curves.Tech Spec Mod Proposed | /03L-0:on 810207,analog Rod Position Indicator Channels H2 & B8 & Associated Rods Were Declared Inoperable When Indications Exceeded Tech Spec.Caused by non-linearity in Indicator Calibr Curves.Tech Spec Mod Proposed | |
| 05000334/LER-1981-018-03, /03L-0:on 810208,analog Rod Position Indicator Channels H2,P8,F10 & K10 Exceeded Tech Specs.Caused by Loss of Indicator Accuracy in Calibr Curves Region.Tech Spec Mod Proposed | /03L-0:on 810208,analog Rod Position Indicator Channels H2,P8,F10 & K10 Exceeded Tech Specs.Caused by Loss of Indicator Accuracy in Calibr Curves Region.Tech Spec Mod Proposed | |
| 05000334/LER-1981-019-01, /01T-0:on 810305,RHR Low Flow Alarm Actuated, Accompanied by Low Current on Operating Pump.Caused by Loss of Suction Pump During Reduction of RCS Level | /01T-0:on 810305,RHR Low Flow Alarm Actuated, Accompanied by Low Current on Operating Pump.Caused by Loss of Suction Pump During Reduction of RCS Level | |
| 05000334/LER-1981-019, Forwards LER 81-019/01T-0 | Forwards LER 81-019/01T-0 | |
| 05000334/LER-1981-020-03, /03L-0:on 810209,remote Control Room Multipoint Recorder Temp Channels Declared Inoperable.Caused by Accidental Repositioing of Local Test Switch Midway Through Gaseous Waste Discharge.Switch Returned to Normal Position | /03L-0:on 810209,remote Control Room Multipoint Recorder Temp Channels Declared Inoperable.Caused by Accidental Repositioing of Local Test Switch Midway Through Gaseous Waste Discharge.Switch Returned to Normal Position | |
| 05000334/LER-1981-020, Forwards LER 81-020/03L-0 | Forwards LER 81-020/03L-0 | |
| 05000334/LER-1981-021-03, /03L-0:on 810210,safety Injection Accumulator 1B, (SI-TK-1B) Low Level Alarm Sounded.Caused by Chemist Leaving Valve Open Following Sampling & Tank Draining Down. Valve Shut | /03L-0:on 810210,safety Injection Accumulator 1B, (SI-TK-1B) Low Level Alarm Sounded.Caused by Chemist Leaving Valve Open Following Sampling & Tank Draining Down. Valve Shut | |
| 05000334/LER-1981-022-03, /03L-0:on 810211,control Room Chlorine Detector 101B Was Tripped Upon Discovering That Electrolyte Was Not Dripping.Cause Not Stated.Flow Orifice Cleaned & Wick Replaced.Investigation Underway | /03L-0:on 810211,control Room Chlorine Detector 101B Was Tripped Upon Discovering That Electrolyte Was Not Dripping.Cause Not Stated.Flow Orifice Cleaned & Wick Replaced.Investigation Underway | |
| 05000334/LER-1981-023-03, /03L-0:on 810212,w/plant Increasing Power from 75% to 80%,delta Flux Out of Target Band Alarm Received. Xenon Transient Associated W/Power Change Caused Axial Flux Difference to Temporarily Exceed Target Band | /03L-0:on 810212,w/plant Increasing Power from 75% to 80%,delta Flux Out of Target Band Alarm Received. Xenon Transient Associated W/Power Change Caused Axial Flux Difference to Temporarily Exceed Target Band | |
| 05000334/LER-1981-024-03, /03L-0:on 810215,during Increase in Power,Delta Flux Out of Target Band Alarm Received.Caused by Xenon Transient Associated W/Power Change Resulting in Increase Axial Flux Differential.Power Increase Stopped | /03L-0:on 810215,during Increase in Power,Delta Flux Out of Target Band Alarm Received.Caused by Xenon Transient Associated W/Power Change Resulting in Increase Axial Flux Differential.Power Increase Stopped | |
| 05000334/LER-1981-025-03, /03L-0:on 810216,increased Leakage from Reactor Coolant (Rc) Loop 1A RTD Manifold Hot Leg Valve RC-20 Reported.Caused by Attempted Maint to Repair Valve.Temp Channels Returned to Svc | /03L-0:on 810216,increased Leakage from Reactor Coolant (Rc) Loop 1A RTD Manifold Hot Leg Valve RC-20 Reported.Caused by Attempted Maint to Repair Valve.Temp Channels Returned to Svc | |
| 05000334/LER-1981-026-03, /03L-0:on 810218,RCS Loop Flow Channel Indication Failed to Meet Min Flow Surveillance Check Requirement. Caused by Transmitter Delta Pressure Transducer Diaphragm Leakage.Transmitter Replaced | /03L-0:on 810218,RCS Loop Flow Channel Indication Failed to Meet Min Flow Surveillance Check Requirement. Caused by Transmitter Delta Pressure Transducer Diaphragm Leakage.Transmitter Replaced | |
| 05000334/LER-1981-027-03, /03L-0:on 810218,at 98% Power,All Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria Specified in Surveillance Test.Caused by Dirty Wicks Which Prevented Flow of Electrolyte.Wicks Cleaned | /03L-0:on 810218,at 98% Power,All Three Chlorine Detectors Failed to Meet Min Electrolyte Drip Rate Criteria Specified in Surveillance Test.Caused by Dirty Wicks Which Prevented Flow of Electrolyte.Wicks Cleaned | |
| 05000334/LER-1981-028-03, /03L-0:on 810219,during Power Operation,Results of Surveillance Test Revealed Reactor Coolant Leakage of 2.09 Gpm.Caused by Failure of Gland Flange on Valve.Split Gland Flange Used as Mod to Repair Valve.Work Completed 81022 | /03L-0:on 810219,during Power Operation,Results of Surveillance Test Revealed Reactor Coolant Leakage of 2.09 Gpm.Caused by Failure of Gland Flange on Valve.Split Gland Flange Used as Mod to Repair Valve.Work Completed 810221 | |
| 05000334/LER-1981-029-01, /01T-0:on 810325,discrepancy Noted Between Plant Mod Manual & Tech Spec 4.0.5 During Review of Inservice Insp Requirements.Caused by Misinterpretation of NRC Endorsement of ASME XI Code as Authorization to Invoke Tech Spec | /01T-0:on 810325,discrepancy Noted Between Plant Mod Manual & Tech Spec 4.0.5 During Review of Inservice Insp Requirements.Caused by Misinterpretation of NRC Endorsement of ASME XI Code as Authorization to Invoke Tech Spec | |
| 05000334/LER-1981-029, Forwards LER 81-029/01T-0 | Forwards LER 81-029/01T-0 | |
| 05000334/LER-1981-029-03, Containment Isolation Check Valve Found to Have Too Low Opening Pressure & Leakage in Excess of Measuring Device Used for Type C Testing.Cause Unknown.Maint Performed | Containment Isolation Check Valve Found to Have Too Low Opening Pressure & Leakage in Excess of Measuring Device Used for Type C Testing.Cause Unknown.Maint Performed | |
| 05000334/LER-1981-030, Forwards LER 81-030/03L-0 | Forwards LER 81-030/03L-0 | |
| 05000334/LER-1981-030-03, /03L-0:on 810309,diesel Generator 2 Would Not Restart After Being Brought to Speed & Tripping,Apparently Due to Overspeed.Caused by Failed Taper Pin & Bent Level in Governor of Diesel.Turbocharger,Taper Pin & Level Replaced | /03L-0:on 810309,diesel Generator 2 Would Not Restart After Being Brought to Speed & Tripping,Apparently Due to Overspeed.Caused by Failed Taper Pin & Bent Level in Governor of Diesel.Turbocharger,Taper Pin & Level Replaced | |
| 05000334/LER-1981-031-01, /01T-0:on 810427,free Chlorine Measured at Outfall Structure & Duration of Condenser Tube Chlorination Exceeded Tech Spec Limits.Caused by Communication Problem Re Inservice Portions of Sys.Overchlorination Stopped | /01T-0:on 810427,free Chlorine Measured at Outfall Structure & Duration of Condenser Tube Chlorination Exceeded Tech Spec Limits.Caused by Communication Problem Re Inservice Portions of Sys.Overchlorination Stopped | |
| 05000334/LER-1981-031, Forwards LER 81-031/01T-0 | Forwards LER 81-031/01T-0 | |
| 05000334/LER-1981-032, Forwards LER 81-032/01T-0 | Forwards LER 81-032/01T-0 | |
| 05000334/LER-1981-032-01, /01T-0:on 810502,vibrations in Feed Line a & High Feed Flow W/Rising Level in Steam Generator a Found During Moisture Carryover Test.Caused by Malfunction of Feed Regulating Valve a Due to Disconnected Actuator | /01T-0:on 810502,vibrations in Feed Line a & High Feed Flow W/Rising Level in Steam Generator a Found During Moisture Carryover Test.Caused by Malfunction of Feed Regulating Valve a Due to Disconnected Actuator | |
| 05000334/LER-1981-033, Has Been Canceled | Has Been Canceled | |