Pages that link to "05000361/LER-1982-001, Forwards LER 82-001/03L-0.Detailed Event Analysis Submitted"
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The following pages link to 05000361/LER-1982-001, Forwards LER 82-001/03L-0.Detailed Event Analysis Submitted:
Displayed 33 items.
- ML20049J920 (redirect page) (← links)
- 05000361/LER-1982-002-01, /01T-0:on 820314,shutdown Cooling Lost.Caused by Sys Malfunction or Operator Error,Allowing Pressurized Nitrogen to Enter Shutdown Cooling Pump Suction Line When Purification Sys Filter Was Backflushed.Procedures Revised (← links)
- 05000361/LER-1982-001-03, /03L-0:on 820214,during Initial Fuel Load,Control Room Emergency Air Cleanup Sys Charcoal Filters (E-419 & A-206) Were Saturated W/Water.Caused by Operator Opening Isolation Valve.Filters Replaced & Sys Returned to Svc (← links)
- 05000361/LER-1982-001 (redirect page) (← links)
- 05000361/LER-2008-003 (← links)
- 05000361/LER-2001-003 (← links)
- 05000361/LER-2001-001 (← links)
- 05000361/LER-1982-036, Forwards LER 82-036/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-021, Forwards LER 82-021/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-019, Forwards LER 82-019/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-034, Forwards LER 82-034/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-023, Forwards LER 82-023/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-015, Forwards LER 82-015/03L-0.Detailed Event Analysis Encl (← links)
- 05000361/LER-1982-020, Forwards LER 82-020/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-014, Forwards LER 82-014/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-010, Forwards LER 82-010/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-006, Forwards LER 82-006/99X-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-008, Forwards LER 82-008/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-017, Forwards LER 82-017/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-013, Forwards LER 82-013/011-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-122, Forwards LER 82-122/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-120, Forwards LER 82-120/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-123, Forwards LER 82-123/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-103, Forwards LER 82-103/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-096, Forwards LER 82-096/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-080, Forwards LER 82-080/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-098, Forwards LER 82-098/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-087, Forwards LER 82-087/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-089, Forwards LER 82-089/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-072, Forwards LER 82-072/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-047, Forwards LER 82-047/01L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-073, Forwards LER 82-073/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-077, Forwards LER 82-077/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-159, Forwards Updated LER 82-159/03L-1.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-076, Forwards LER 82-076/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-064, Forwards LER 82-064/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-174, Forwards LER 82-174/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-173, Forwards LER 82-173/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1994-001, Submits Voluntary LER 94-001 Re Actuation of Train a of Toxic Gas Isolation Sys.Event Not Reportable Due to Preplanned Requirements of TS (← links)
- 05000361/LER-1983-003, Forwards LER 83-003/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-004, Forwards LER 83-004/01T-0.Detailed Event Analysis Encl (← links)
- 05000361/LER-1982-171, Forwards LER 82-171/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-006, Forwards LER 83-006/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-158, Forwards LER 82-158/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-151, Forwards LER 82-151/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-149, Forwards LER 82-149/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-147, Forwards LER 82-147/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-148, Forwards LER 82-148/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-099, Forwards LER 82-099/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-093, Forwards LER 82-093/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-094, Forwards LER 82-094/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-066, Forwards LER 82-066/01T-0 & 82-067/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-040, Forwards LER 82-040/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-045, Forwards LER 82-045/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-039, Forwards LER 82-039/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-042, Forwards LER 82-042/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-069, Forwards LER 82-069/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-046, Forwards LER 82-046/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-048, Forwards LER 82-048/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-041, Forwards LER 82-041/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-035, Forwards LER 82-035/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-043, Forwards LER 82-043/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000361/LER-1983-014, Forwards LER 83-014/03L-0.Detailed Event Analysis Encl (← links)
- 05000361/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000361/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000361/LER-1983-005, Forwards LER 83-005/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-012, Forwards LER 83-012/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-146, Forwards LER 82-146/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-144, Forwards LER 82-144/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-136, Forwards LER 82-136/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-160, Forwards LER 82-160/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-143, Forwards LER 82-143/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-125, Forwards LER 82-125/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-128, Forwards LER 82-128/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-132, Forwards LER 82-132/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-140, Forwards LER 82-140/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-138, Forwards LER 82-138/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-141, Forwards LER 82-141/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-134, Forwards LER 82-134/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-133, Forwards LER 82-133/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-137, Forwards LER 82-137/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-135, Forwards LER 82-135/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-176, Forwards LER 82-176/01T-0 (← links)
- 05000361/LER-1982-113, Forwards LER 82-113/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-115, Forwards LER 82-115/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-118, Forwards LER 82-118/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000361/LER-1983-018, Forwards LER 83-018/01T-0 (← links)
- 05000361/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000361/LER-1982-090, Forwards LER 82-090/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-127, Forwards LER 82-127/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-126, Forwards LER 82-126/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-169, Forwards LER 82-169/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-167, Forwards LER 82-167/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-150, Forwards LER 82-150/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-110, Forwards LER 83-110/01T-0 & 83-048/01T-0 (← links)
- 05000361/LER-1983-074, Forwards LER 83-074/01T-0.Failure to Sample & Analyze Last of Three 8 H Grab Samples Not Considered Significant Event (← links)
- 05000361/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000361/LER-1983-035, Forwards LER 83-035/03L-0 (← links)
- 05000361/LER-1983-036, Forwards LER 83-036/01T-0 (← links)
- 05000361/LER-1983-026, Forwards LER 83-026/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-033, Forwards LER 83-033/03L-0 (← links)
- 05000361/LER-1983-034, Forwards LER 83-034/03L-0 (← links)
- 05000361/LER-1983-025, Forwards LER 83-025/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-024, Forwards LER 83-024/03L-0 (← links)
- 05000361/LER-1983-028, Forwards LER 83-028/03L-0 (← links)
- 05000361/LER-1983-029, Forwards LER 83-029/03L-0 (← links)
- 05000361/LER-1985-005, Forwards LER 85-005-00 Re Control Room Isolation Actuation. Events Involve Components Common to Units 2 & 3.Single Rept Submitted in Accordance w/NUREG-1022 (← links)
- 05000361/LER-1982-175, Forwards LER 82-175/01T-0 (← links)
- 05000361/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000361/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000361/LER-1983-021, Forwards LER 83-021/03L-0 (← links)
- 05000361/LER-1982-124, Forwards LER 82-124/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-033, Forwards LER 82-033/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-065, Forwards LER 82-065/01T-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-037, Forwards LER 82-037/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1983-010, Forwards LER 83-010/01T-0 (← links)
- 05000361/LER-1979-135, Forwards LER 79-135/03L-0 (← links)
- 05000361/LER-1998-025, Forwards LER 98-025-00,re Occurrence Involving MSSV Setpoints.Actions Listed Are Intended to Ensure Continued Compliance with Existing Commitments.No New Commitments Made (← links)
- 05000361/LER-1999-005, Forwards 30-day follow-up LER 99-005-00,describing Loss of Physical Train Separation in Control Room.Any Actions Listed Intended to Ensure Continued Compliance with Existing Commitments (← links)
- 05000361/LER-1999-004, Forwards LER 99-004-00 Re Automatic Tgis Actuation.Event Affected Units 2 & 3 Equally Because Tgis Is Shared Sys. Single Rept Is Being Provided for Unit 2 IAW NUREG-1022, Rev 1.No New Commitments Are Contained in Encl (← links)
- 05000361/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-056, Forwards LER 82-056/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1986-036, :on 860619,line Voltage Regulators Caused Vital Buses to Be Inoperable.Caused by Procedural Discrepancy. Revised Procedure SO23-II-11.184 (← links)
- 05000361/LER-1998-009, :on 980429,discovered That CST Was Outside Design Basis Due to Procedure Error.Caused by Individual Error.Replaced Steps That Had Been Inadvertently Deleted from Aoi (← links)
- 05000361/LER-1996-012, :on 960229,discovered That CST Was Outside Design Basis.Cause Under Investigation.Compensatory Measures Were Put in Place to Administratively Increase Tanks Water Volume & to Procedularize Operator Actions (← links)
- 05000361/LER-1998-010-01, Forwards LER 98-010-01 for Fuel Handling Bldg post-accident Cleanup Unit Being Inoperable Because of Flow Calibr Error. Health & Safety of Neither Public Nor Plant Personnel Affected by Occurrence (← links)
- 05000361/LER-1998-011, :on 980617,determined That Setpoints for High Log Power Bypass Automatic Removal Had Not Been Verified IAW Ts.Caused by Log Power Not Satisfying TS as Written.Utils Investigation If Ongoing & LER Will Be Revised by 980930 (← links)
- 05000361/LER-1998-010, :on 980526,post-accident Cleanup Units Trains Were Declared Inoperable.Unit Concluded Condition May Be Reportable Under 10CFR50.73(a)(2)(i) for Operation During Past Refueling Outages.Ler Will Be Revised by 980828 (← links)
- 05000361/LER-1998-009, :on 980428,discovered That Steps in Aoi to Isolate Tank Following Operating Bases Earthquake Had Been Inadvertently Deleted in Aug 1996.Caused by Individual Error.Event Reviewed W/Individual Involved (← links)
- 05000361/LER-1996-012, :on 960226,condensate Storage Tank Outside Design Basis Occurred.Caused by Several Mechanisms for Loss of Water Vol from T-120.Procedures Revised (← links)
- 05000361/LER-2098-003, LOCA Evaluation of Safety Significance of Failure of Emergency Sump Valve Linestarter (LER 1998-003) (← links)
- 05000361/LER-1997-011, :on 970704,instrumentation Channel 1 Declared Inoperable.Caused by Cognitive Personnel Error.Operator Was Coached in Need for Attention to Detail & Util Revised Procedures (← links)
- 05000361/LER-1998-003, :on 980205,inoperable Valve Occurred Due to Grit in Linestarter Mechanism.Sce Has Been Programmatically Replacing Square D Linestarters (← links)
- 05000361/LER-1998-001, :on 980113,loose Collar Was Noted on Turbine Driven AFW Speed Circuit.Caused by Collar Not Properly Being Tightened at Last Documented Reassembly in 1993.Collar & Plug Were Reassembled (← links)
- 05000361/LER-1998-001-01, Forwards LER 98-001-01 & 98-003-01 Re Loose Collar in Speed Sensing Circuitry of Turbine Driven Afp & Inoperable Containment Emergency Sump Outlet Valve (← links)
- 05000361/LER-1998-007, :on 980317,discovered Matl in Containment That Could Become Debris in Emergency Sumps.Caused by Ineffective Program Mgt.Removed Identified Matl & Will Issue Memo to Personnel Emphasizing Containment Cleanliness Maint (← links)
- 05000361/LER-1998-005, :on 980305,inadequate Voltage to 120 Vac Circuits Due to Calculation Error Occurred.Caused by Personnel Error.Sys Mods Made to Affected Sys to Correct Deficiencies (← links)
- 05000361/LER-1998-008, :on 980306,4160 Vac Supply Cable Exceeded Ampacity Rating.Caused by Error in Feeder Cable Sizing Calculation Completed by Plant Architect/Engineer. Administrative Restrictions Imposed (← links)
- 05000361/LER-1986-026, :on 860826,condenser Evacuation Sys Effluent Monitor 2RE-7870 Found Inoperable Due to Open Isolation Valves.Caused by Personnel Error Resulting in Valve Misalignment.Personnel Trained (← links)
- 05000361/LER-1986-018, :on 860707,reactor Tripped on Dnbr/Local Power Density After Control Element Assemblies 55 & 49 Dropped. Caused by Electronic Failures of Control Element Drive Mechanism Control Sys on Increased Room Temp (← links)
- 05000361/LER-1986-028, :on 860211,surveillance Interval for Safety Injection Tank Boron Concentrations Exceeded Tech Spec 4.0.2.Caused by Oversight & Inadequate Administrative Controls.Personnel Counseled (← links)
- 05000361/LER-1986-017, :on 860317,18-month Functional Test Revealed Failure of 8 Out of 27 Pacific Scientific PSA-100 Snubbers. Caused by Vibration Induced Damage.Deficient Snubbers Replaced (← links)
- 05000361/LER-1987-001-02, :on 870205,reactor Manually Tripped by Operations Personnel Observing Closure of Main Feedwater Block Valve 2HV-4051.Caused by Const Personnel Erroneously Performing Work in Valve Control Cabinet (← links)
- 05000361/LER-1986-031, :on 861207,18-month Interval Surveillance of Fire Water Deluge Sys Inside Containment Deliquent.Caused by Improper Implementation of Administrative Controls.Fire Protection Surveillance Scheduling Revised (← links)
- 05000361/LER-1999-005-01, :on 990831,loss of Physical Separation in Control Room,Occurred.Caused by Personnel Error.Creacus Train a Was Returned to Standby on 990831 (← links)
- 05000361/LER-1986-021, :on 860720,spurious Actuation of Fuel Handling Isolation Sys Train B Occurred When Airborne Monitor 2RE-7823 Alarmed.Caused by Random Electrical Noise Spike. Detector Replaced (← links)
- 05000361/LER-1986-009-01, :on 860416,inservice Insp Identified Excessive Wear of Hinge Pins in 4-inch Tilting Disc Check Valves. Caused by Continual Oscillation of Valve Disc.Satellite Sleeves Installed (← links)
- 05000361/LER-1986-016, :on 860622,toxic Gas Isolation Sys Train a Actuated Due to Spurious Electrical Signal in Ammonia Analyzer Channel.Cause Unknown.Train a Analyzer Checked for Proper Calibr & Operation (← links)
- 05000361/LER-1986-027, :on 860913,reactor Trip Generated by All Four Core Protection Calculator Channels.Caused by Failed Control Element Assembly Indication Due to Loose Solder Joint.Reed Switch Position Transmitter Replaced (← links)
- 05000361/LER-1986-025, :on 860829,Train B of Toxic Gas Isolation Sys Actuated Control Room Emergency Air Cleanup Sys on High Butane Gas Level.Caused by Use of Cleaning Agents Near Butane Analyzer.Use of Cleansers Discontinued (← links)
- 05000361/LER-1999-004-01, :on 990708,automatic Tgis Actuation Occurred. Caused by Small Leak in Suction Side of Tgis Train a Sample Pump.Small Leak Repaired (← links)
- 05000361/LER-1986-024, :on 860821 & 27,containment Purge Isolation Sys Spuriously Actuated by Containment Area Radiation Monitor. Caused by Random Electrical Noise Spikes on Monitor. Detector Replaced (← links)
- 05000361/LER-1986-022, :on 860812,reactor Trip Occurred When RCS Pressure Reached Core Protection Calculator Auxiliary Trip Setpoint of 2375 Psia.Rcs Pressure Transient Resulted from MSIV Closure.Muffler Studs Will Be Replaced (← links)
- 05000361/LER-1986-029, :on 861210,reactor Tripped on Turbine Trip During Power Interruption to Turbine Governor Control Sys. Caused by Failure to Perform Procedure to Defeat Automatic Retransfer Circuit During Transfer of Load (← links)
- 05000361/LER-1986-017, :on 860317,during Surveillance Testing,Pacific Scientific PSA-100 Snubbers Exhibited vibration-induced Damage.Cause Not Stated.Deficient Snubbers Replaced. Engineering Evaluation of Effects Performed (← links)
- 05000361/LER-1999-002, :on 990208,pressurizer Safety Valves Were Above TS Limit.Caused by Setpoint Drift.Sce Submitted License Amend Application on 980904 Requesting Tolerence Be Changed to +3/-2%.With (← links)
- 05000361/LER-1986-015, :on 860619,reactor Tripped.Caused by Shorted Capacitor Resulting in Inverter YOO3 Failure.Capacitor Replaced & Inverter Returned to Svc (← links)
- 05000361/LER-1999-001, :on 990201,automatic Start of EDG Was Noted. Caused by Workers Closing Breaker 2A0418 by Discharging Closing Springs.Operators Restored SDC in Approx 26 Minutes. with (← links)
- 05000361/LER-1986-030, :on 860911,core Protection Calculator Channel a Failed.Caused by Equipment Approaching End of Expected Life Cycle.Power Supply Replaced (← links)
- 05000361/LER-1986-023, :on 861129,Trains a & B of Toxic Gas Isolation Sys Actuated When Respective Ammonia Analyzer Channels Reached Setpoints.Control Room Emergency Air Cleanup Sys Actuated as Required (← links)
- 05000361/LER-1986-020, :on 860714,fuel Handling Isolation Sys Occurred When Airborne Monitor 2RI-7822A Alarmed.Caused by Noble Gas in Fuel Handling Bldg.Briefing to Ensure Proper Venting Conducted (← links)
- 05000361/LER-1986-019, :on 860714,reactor Trip Occurred When RCS Pressure Reached Core Protection Calculator Setpoint.Caused by Pitted Contacts on Trip Path Auxiliary Relays.Relay Replaced (← links)
- 05000361/LER-1987-002-01, :on 870219,sump Effluent Monitor 2RE-7821 Found Partially Plugged W/Debris After Monitor Removed from Svc to Implement Sample Line Mods.On 870303,monitor 3RE-7821 Found Partially Plugged.Design Mods Implemented (← links)
- 05000361/LER-1984-056, :on 841002,failure of Vital Inverter 2Y002 Resulted in de-energization of Channel B 120-volt Ac Vital Bus.Caused by Diode Short in Power Supply.Power Supply Replaced & Tested (← links)
- 05000361/LER-1986-008, :on 860331,while Performing Surveillance Procedure S023-3-3.25.1 in Mode 6,source-range Neutron Flux Monitor Audible Indicator Found Inoperable.Caused by Inexplicit Procedure.Procedure Revised (← links)
- 05000361/LER-1986-007, :on 860326,during Cold Shutdown,Loss of Shutdown Cooling Sys Flow Occurred.Caused by Erroneous Level Indication in Tygon Manometer Ref Scale & Air Bubble in Tygon Tubing.Indicator Reinstalled (← links)
- 05000361/LER-1998-002, :on 980126,reactor Coolant Sys Boundary Leakage Occurred.Caused by Cracking of Inconel 600 Nozzle.Four Nozzles (2TW0139B,2TE0122-4,2PDT0978-1 & 2PDT0978-2) Were Repaired (← links)
- 05000361/LER-1986-013, :on 860610,reactor Trip Occurred When Steam Generator E089 Reached 90% Trip Setpoint.Caused by Excessive Dead Band in Main Feed Pump Speed Controller at Low Flow. Dead Band Adjusted (← links)
- 05000361/LER-1998-001-01, :on 980113,turbine Driven Auxiliary Feedwater Pump Speed Circuit Collar Loose Were Noted.Caused by vibration-induced Loosening During Periodic Pump Test Runs. Collar & Plug Were Reassembled (← links)
- 05000361/LER-1986-012, :on 860603,plant Protection Sys Actuation Generated on Low Reactor Coolant Flow Channels Due to Smoke Observed in Area of Reactor Coolant Pump P004.Smoke Caused by Cloth Rag.Maint Practices Reviewed (← links)
- 05000361/LER-1986-014, :on 860613,during Routine Weekly Battery Bank Testing,Cell Gravity Readings Found Outside Allowable Values on Cell 35.Caused by Confusing Tech Spec Acceptance Criteria.Surveillance Procedures Clarified (← links)
- 05000361/LER-1986-011, :on 860607,Train a Containment Purge Isolation Sys Spuriously Actuated from Containment Radiation Monitor 2RT-7856.Caused by Random Electrical Noise Spike.Detector Replaced & Properly Grounded (← links)
- 05000361/LER-1986-010, :on 860517,w/unit in Mode 5,Fuel Handling Isolation Sys Train B Actuated When Noble Gas Airborne Radiation Monitor 2RE-7823B Spuriously Alarmed.Caused by Radiation Monitor Sensitivity to Noise (← links)
- 05000361/LER-1998-015-01, Forwards LER 98-015-01 Re Event Involving Requirement to Obtain Isokinetic Samples of Airborne Radioactive Effluent Streams.Single Rept for Unit 2 Is Being Submitted,Per NUREG- 1022,Rev 1,although Occurrence Is Applicable to (← links)
- 05000361/LER-1997-016, :on 971202,SONGS Personnel Recognized That Fire Damper SARW504165001FD Was Not in Licensee Controlled Specification Surveillance Procedure.Caused by Cognitive Personnel Error.Occurrence Reviewed W/Appropriate Personnel (← links)
- 05000361/LER-1985-049, :on 851004,seven Pacific Scientific Snubbers Found Frozen on Shutdown Cooling Sys.Caused by Water Hammer Due to Air Pockets from Inadequate Venting.Snubbers Replaced & Addl Venting Capability Will Be Added (← links)
- 05000361/LER-1998-021, :on 980903,train B Ecw Chiller Failed to Start Using CR Start Push Button.Caused by Incorrect Wiring of Switch by Personnel.Wiring Was Corrected & Chiller Was Declared Operable on 980926 (← links)
- 05000361/LER-1998-020, :on 980806,determined That Ecw Sys Was Inoperable.Caused by Faulty Temp Control Unit.Temp Control Unit Was Replaced & Chiller Performed Satisfactorily (← links)
- 05000361/LER-1998-011-01, Forwards LER 98-011-01,re Inadequate Surveillance Test of Logarithmic Power Trip Bypass Removal Function.No New Commitments Are Made by Util (← links)
- 05000361/LER-1998-006-01, Forwards LER 98-006-01,re Event Involving Missed TS Surveillance.Sce Is Submitting Revised TS to Provide Addl Info Re Missed TS (← links)
- 05000361/LER-1986-005, :on 860128,safety Injection Tanks (SIT) 7 & 10 Exceeded Max Pressure Limit.Caused by in-leakage of Borated Water Through Individual Fill/Drain Valves During Filling of SIT 8.Fill/drain Valve Actuators Replaced (← links)
- 05000361/LER-1986-004, :on 860109,reactor Manually Tripped When Main Feedwater Pumps Tripped Due to High Discharge Pressure. Caused by Failure of Coil in solenoid-operated Pilot Valve HY-4047 Due to Moisture.Valve Replaced (← links)
- 05000361/LER-1998-013-01, Forwards LER 98-013-01,re Post LOCA CR Dose Being Outside Design Basis.Single Rept Is Being Submitted Because Condition Involves Similar Sys,Causes,C/As Applicable to Both Units 2 & 3 IAW NUREG-1022 (← links)
- 05000361/LER-1998-004-01, :on 980211,diesel Fuel Oil Particulates - ASTM Test Methods Yield Varying Results Were Received.Caused by Unexpected Variations Obtained from Different Test Methods. Fuel Oil Filtered & Confirmed by Reanalysis (← links)
- 05000361/LER-1997-011, :on 970704,wrong B Sample Was Used for Shutdown Margin Surveillance.Caused by Personnel Error.Revised Procedures for Performing SDM Calculations (← links)
- 05000361/LER-1997-010, :on 970626,check Valve in Charging Subsystem Failed to Open Completely.Caused by Design Defect.Replaced Faulty Design Valves.Rept Includes 10CFR21 Info (← links)
- 05000361/LER-1988-015, :on 880614 & 23,fuel Handling Sys Inadvertently Actuated While Attempting to Realign key-lock Bypass Switch to Containment Purge Isolation Sys Monitor.Caused by Personnel Error.Technicians Counseled (← links)
- 05000361/LER-1997-007-01, Forwards LER 97-007-01,reporting Occurrence Involving Incomplete Surveillance Testing of Radiation Monitors. Neither Health Nor Safety of Plant Personnel or Public Affected by Occurrence (← links)
- 05000361/LER-1985-057, :on 851216,Train a of Toxic Gas Isolation Sys Actuated on High Butane Gas Level.Caused by Electrical Short Circuit in Butane Burner.Electrical Short Repaired (← links)
- 05000361/LER-1986-003, :on 860314,control Room Isolation Sys Train B Actuation Occurred.Caused by Failed Capacitor Control Room Radiation Monitor Power Supply.Power Supply Repaired & Monitor Returned to Svc (← links)
- 05000361/LER-1986-006, :on 860315 RCS Sample Analysis Indicated RCS Specific Activity Exceeded 1 Mci/G Dose Equivalent I-131. Caused by Iodine Spike.Rcs Specific Activity Reduced to Acceptable Limit on 860315 (← links)
- 05000361/LER-1986-002-01, :on 860301,fuel Handling Isolation Sys Actuated When Airborne Monitor 2RI-7822B Alarmed.Caused by Small Amount of Noble Gas in Fuel Handling Bldg Due to Degass Sys Valve Leak.Valve Repaired (← links)
- 05000361/LER-1997-009, :on 970509,class IE 125 Vdc Battery Surveillance Testing Was Completed on 3 Replaced Batteries, Indicating Apparent Drop in Capacity of Two.Caused by No Requirement to Test.Revised TS Bases (← links)
- 05000361/LER-1984-072, :on 841130,radiation Monitors 2/3 RI-7825 & 2/3 RI-7824 Found in Alarm Defeat.Cause Unknown.Monitors Immediately Placed in Normal Mode (← links)
- 05000361/LER-1985-046, :on 850912,reactor Tripped Due to Generator Exciter Fire.Fire Caused by Oil Migration to Brush Assembly Causing Buildup of Carbon Dust from Worn Slip Rings.Slip Rings Replaced & Brush Wear Monitored (← links)
- 05000361/LER-1985-056, :on 851114,Train a Containment Purge Isolation Sys Spuriously Actuated Due to Electrical Noise Spike on Containment Area Radiation Monitor 2RT-7856.Caused by Ground Current Surges Entering Detector (← links)
- 05000361/LER-1984-023, :on 840524,spurious Actuation of Control Room Isolation Sys Occurred Because of Noise Spike on Control Room Airborne Radiation Monitor.Monitor Detector Replaced & Preamplifier Properly Grounded (← links)
- 05000361/LER-1985-019, :on 850517,fuel Handling Isolation Sys Actuated by Spurious Airborne Monitor Alarm.Probably Caused by Radiation Monitor Detector Sensitivity.Spurious Actuations Also Occurred on 850519,26 & 0607 (← links)
- 05000361/LER-1985-039, :on 850722,toxic Gas Isolation Sys Train B Actuated When Hydrocarbon Analyzer Malfunctioned.Control Room Emergency Air Cleanup Sys Actuated as Required.Toxic Gas Isolation Sys Reset (← links)
- 05000361/LER-1985-060, :on 851109,reactor Tripped Due to Dnbr/Local Power Density Trip Signals on Reactor Protection Sys.Caused by Hot Channel Axial Shape Index Reaching Core Protection Calculator Auxiliary Trip Setpoint (← links)
- 05000361/LER-1997-008, :on 970304,TS Surveillance of Pressurizer Cooldown Rate Was Missed Because Operator Did Not Recognize That real-time Evaluation Plant Data Was Required.Cooldown Transient Terminated (← links)
- 05000361/LER-1985-055, :on 851029,fuel Handling Isolation Sys Train a Actuated by Signal from Fuel Handling Bldg Vent Airborne Process Radiation Monitor 2RE-7822B.Train B Manually Actuated.Caused by High Voltage Power Failure (← links)
- 05000361/LER-1997-005, :on 970319,determined That RCS Leakage Was Through Body of Valve Packing Leakoff Plug Caused by Defect. Defective Plug Confirmed to Be Free of Similar Defects, Removed Head & Ground Smooth (← links)
- 05000361/LER-1997-006, :on 970319,NRC Noted Some Utils Had Not Been Fully Complying W/Requirements of TS Re Surveillance Testing of Electronic Circuits,Per GL 96-01.Specific Cause of Omission Not Known.Procedures Revised (← links)
- 05000361/LER-1986-001, :on 860102 & 04,inoperable & Degraded Snubbers Found on Main Steam Line to Auxiliary Feedwater Pump Turbine.Caused by Hydraulic Transient.Snubbers Replaced & Engineering Analysis Performed (← links)
- 05000361/LER-1985-054, :on 851025,determined That 60-month Surveillance Requirement 4.8.4.1.b Exceeded on Containment Penetration Conductor Overcurrent Protective Devices 2BF08 & 2BF09.Devices Last Surveyed on 780706 & 0512 (← links)
- 05000361/LER-1997-004, :on 970303,discovered Steam Leakage from Reactor Coolant Sys Pressurizer Thermowell.Caused by Primary Water Stress Corrosion Cracking of Alloy 600 Type Materials. Removed & Replaced Nozzle W/Inconel 690 (← links)
- 05000361/LER-1985-053, :on 851023,determined That Alarm/Trip Setpoint for Noble Gas Activity Monitor 2RT-7828 Lower than Required by Tech Spec 3.3.3.9.Caused by Personnel Failure to Review Release Permit.Review Procedures Revised (← links)
- 05000361/LER-1985-058, :on 851210,reactor Tripped When Low Level Occurred in Steam Generator (S/G) E089.Caused by I&C Technician Inadvertently Isolating Nitrogen Supply to 2HV4052 During Maint (← links)
- 05000361/LER-1985-052, :on 851022,spurious Toxic Gas Isolation Sys (Tgis) Train B Actuation Occurred.Caused by Meter Indications on Tgis Panel Less than Respective Setpoints. Tgis Reset (← links)
- 05000361/LER-1997-003, :on 970225,out of Tolerance Condition Identified During Testing of Pressurizer Safety Valve Setpoints.Caused by Setpoints Drift.Setpoints Bounded by Analysis (← links)
- 05000361/LER-1985-059, :on 851211,Toxic Gas Isolation Sys Train a Spuriously Actuated During Troubleshooting of Ammonia Analyzer After Analyzer Failed Low.Probably Caused by Loose Power Supply Fuse Holder (← links)
- 05000361/LER-1985-051, :on 851019,reactor Tripped.Caused by Negative Axial Shape Index (Asi) Reaching Parameter Trip Setpoint. Analysis of Plant Response to Asi on Restart Performed (← links)
- 05000361/LER-1985-038, :on 850716,fire Watch Supervisor Prematurely Authorized Removal of Fire Watch.Caused by Personnel Miscommunication.Fire Watch Immediately Reestablished & Supervisory Personnel Received Training (← links)
- 05000361/LER-1985-047, :on 851011,toxic Gas Isolation Sys Train a Actuated Due to Spurious Electrical Signal from Ammonia Analyzer Channel.Cause Undetermined.Train a Analyzer Checked for Proper Calibr & Returned to Svc (← links)
- 05000361/LER-1985-050, :on 851018,reactor Trip on Loss of Load Occurred.Caused by Turbine Trip Generated by Spurious High Drain Tank Level on Moisture Separator Reheater T096.Failed Pipe Nipple Replaced (← links)
- 05000361/LER-1997-002, :on 970128,increase in Pressurizer Level Occurred Due to Valve Alignment Error.Npeo Was Temporarily Removed from Duties & Counseled by Mgt (← links)
- 05000361/LER-1985-018-01, :on 850820,reactor Tripped in Response to Trip Signals from Channels 1 & 3 of Core Protection Calculators. Caused by Inadequate Guidance in 31-day Surveillance Testing Procedure.Procedures Revised (← links)
- 05000361/LER-1984-061, :on 841022 & 1107 & 08,Train a Containment Purge Isolation Sys (Cpis) Spuriously Actuated.Caused by Induced Electrical Noise Spikes on Containment Area Radiation Monitor 2RT-7856.Setpoint Reset (← links)
- 05000361/LER-1984-008-02, :on 840211,inadvertent Entry Into Mode 3 Occurred.Caused by Failure of Plant Monitoring Sys (PMS) Due to Incorrect RCS Temp Display.Pms Display Repaired & Returned to Svc (← links)
- 05000361/LER-1984-010-02, :on 840223,reactor Power Surge Occurred Due to Partial Loss of Extraction Steam Feedwater Heating.Caused by Spurious Cycle of First Point Level Controller Resulting in High Levels in Point Heaters (← links)
- 05000361/LER-1985-041, :on 850801,reactor Tripped in Response to Loss of Load Trip Signals Generated by Spurious Turbine Trip. Caused by Voltage Transient on Phase a of Noninterruptible Power Supply Inverter.Design Change Effected (← links)
- 05000361/LER-1985-040, :on 850801,control Room Isolation Sys Train B Actuated Due to Spurious Alarm on Control Room Radiation Monitor.Cause Unknown.Investigative Maint Order Written to Check for Defective Components (← links)
- 05000361/LER-1996-009, :on 961216,surveillance Testing of EDG non-critical Trip Bypasses Occurred.Caused by Inadequate Nov 1983 Test Procedure.Procedure Will Be Revised (← links)
- 05000361/LER-1996-002, :on 960209,potential Decalibration of Logarithmic Power Level Instrumentation Discovered.Caused by Calibr Error.Reanalysis Underway Considering All Factors Effecting Calibr (← links)
- 05000361/LER-1996-008, :on 960926,RCP Lube Oil Collection Sys Sightglass & Mounting Extended Slightly Beyond Lateral Limits of Oil Collection Sys Drain Pan,Resulting in Leaking Oil Outside Sys.Cause Under Investigation (← links)
- 05000361/LER-1985-042, :on 850927,incorrect Naoh Density Value Used for Calibr of Level Transmitters Associated W/Spray Chemical Storage Tank.Caused by Errant Design Calculation.Design Calculations for safety-related Tank Reviewed (← links)
- 05000361/LER-1996-011, :on 961216,air Operated Containment Isolation Valve Declared Inoperable.Caused by Two Separate Errors Could Have Caused Valve 2HVO513 to Have Insufficient Closing Force.Edison Will Reset & Retest Valve 2HV0513 (← links)
- 05000361/LER-1985-045, :on 850909,discovered That Position Verification Not Performed at Scheduled Time for Control Element Assembly Calculator 2 on 850815.Caused by Personnel Error.Notation Included in Surveillance Log (← links)
- 05000361/LER-1985-048, :on 850915,w/unit in Mode 3,containment Purge Initiated,Requiring Collection of Iodine & Particulate Sample.Sample Collected Late Due to Failure of Chemistry Technician to Follow Direction (← links)
- 05000361/LER-1985-037, :on 850707,while Troubleshooting Spurious Noise Problems,Control Room Isolation Sys Train B Actuated.Caused by Failure of Alarm Defeat Circuit in Test Module Used in Radiation Monitor 2/3RE-7825B (← links)
- 05000361/LER-1985-032, :on 850703,control Room Isolation Sys (EIIS Sys Code VA) Train B Actuated Due to Malfunction of Control Room Radiation Monitor 2/3 RE-7825B2.Caused by Instrument Malfunction.Monitor Rebuilt (← links)
- 05000361/LER-1996-010, :on 961210,containment Escape Hatch Not Closed While Performing Core Alterations.Caused by Failure to Recognize That Opening Emergency Escape Hatch Doors Would Cause Pevs to Be Open.Event Reviewed W/Staff (← links)
- 05000361/LER-1985-043, :on 850831,toxic Gas Isolation Sys Train a Actuated.Caused by Electrical Failure in Ammonia Analyzer Channel.Power Supply,Balance Potentiometer & Motor Source Assembly Components Replaced (← links)
- 05000361/LER-1985-044, :on 850910,Train a Containment Purge Isolation Sys Spuriously Actuated Due to Electrical Noise Spike on Containment Area Radiation Monitor.Investigation Underway. Containment Purge Isolation Sys Reset (← links)
- 05000361/LER-1985-035, :on 850605,waste Gas Surge Tank & Waste Gas Decay Tank Out of Svc.Caused by Lack of Specific Direction & Misused Terminology.Operators Instructed in Importance of Providing Specific Details While Giving Orders (← links)
- 05000361/LER-1985-036, :on 850610,containment Purge Isolation Sys Train Actuated by Instrument Failure Signal from Containment Area Radiation Monitor.Caused by Wire Improperly Wrapped Around Terminal Lug.Wire Resoldered (← links)
- 05000361/LER-1996-006, :on 960826,NRC Inspector Observed Local Voltage Meter for Vital Bus Inverter Y003 Indicating 122.5 Volt Ac. Caused by Util Not Providing Quantitative Operability Info. Occurrence Will Be Reviewed (← links)
- 05000361/LER-1985-028, :on 850419,trip Generated by Core Protection Calculators Caused by Increase in Loop Temp Difference in RCS Due to Pressure Regulator Failure to Supply Nitrogen to MSIV 2HV-8205.Regulator Replaced (← links)
- 05000361/LER-1985-027, :on 850507,containment Purge Isolation Sys Actuated.Caused by Noise Spike on Containment Area Radiation Monitor 2RT-7856.Detailed Study of Plant Ground Sys in Progress (← links)
- 05000361/LER-1985-029, :on 850504 & 11,spurious Toxic Gas Isolation Sys (Tgis) Train a Actuation Occurred W/Unit in Mode 1. Caused by Several Conditions,Including Vibration.Tgis Reset. W/Undated Ltr (← links)
- 05000361/LER-1985-034, :on 850528,toxic Gas Isolation Sys Train B Actuated on Instrument Failure Signal.Caused by Hydrocarbon Analyzer flame-out Due to Error in Exchanging Hydrogen Bottles.Operating Instruction Will Be Revised (← links)
- 05000361/LER-1985-025, :on 850330 & 31,auxiliary Sample Pump Improperly Installed.Caused by Personnel Error.Technician Attempted to Install Pump from Memory.Event Discussed W/ Technician & Disciplinary Action Administered (← links)
- 05000361/LER-1985-026, :on 850416,review Indicated Two Chemistry Samples on 850329 Not Properly Counted.Caused by Oversight by Chemistry Technicians.Events Discussed W/Technicians & Disciplinary Actions Administered (← links)
- 05000361/LER-1985-024, :on 850416,reactor Tripped.Caused by Response to Low DNBR Trip Signals from Core Penetration Calculators Due to Temp Difference Between RCS Loop Cold Leg Temps. Appropriate Procedures Revised (← links)
- 05000361/LER-1985-033, :on 850527,control Room Isolation Sys Train B Spuriously Actuated by Apparent Noise Spike on Control Room Radiation Monitor 2/3 RI-7825.Possibly Caused by Electrical Noise Spike.Detailed Study in Progress (← links)
- 05000361/LER-1992-009-01, Forwards LER 92-009-01 Re Misalignment of Salt Water Cooling Pump Emergency Seal Water Supply Isolation Valve (← links)
- 05000361/LER-1985-031, :on 850518,reactor Tripped in Response to Low DNBR Trip Signals.Caused by Missing Lug Nut on Lead from Card Cage to Ground Bus Common to Control Element Assembly Subgroups 5 & 6.Lead Reterminated (← links)
- 05000361/LER-1992-012, :on 920731,automatic Reactor Trip Occurred When Potential Transformer Drawer Opened for Thermographic Insps, Resulting in Trip of Reactor Coolant Pumps.Caused by Inadequate Warning Sign.Guidelines Enhanced (← links)
- 05000361/LER-1985-030, :on 850504,7-day Fire Door Surveillance Not Performed.On 850506,25% Extension Allowed by Tech Spec Exceeded.Caused by Personnel Oversight.Inspector Disciplined (← links)
- 05000361/LER-1985-023, :on 850331,containment Purge Isolation Sys Train a Spuriously Actuated.Caused by Electrical Noise Spike on Containment Area Radiation Monitor.Detailed Study of Plant Ground Sys Being Performed (← links)
- 05000361/LER-1985-022, :on 850330,during Monthly Surveillance on Pressurizer Pressure Low,Technician Removed Bypass from Channels A,C & D.Caused by Personnel Error.Technician Disciplined (← links)
- 05000361/LER-1985-010, :on 850321,31 & 0407,spurious Actuation of Toxic Gas Isolation Sys Train a Occurred.Caused by Conditions Including Overly Conservative Alarm Setpoints, Electrical Noise Levels & Rapid Temp (← links)
- 05000361/LER-1985-012, :on 850319,fire Watch in Electrical Cable Tunnel for Inoperable Fire Suppression Sys Evacuated Due to Smell of Ammonia Gas.Caused by Exhaust Fan Drawing Steam & Ammonia Into Tunnel.Cable Tunnel Ventilated (← links)
- 05000361/LER-1984-044, :on 840803,toxic Gas Isolation Sys Train a Initiated Due to High Butane (Hydrocarbons).Caused by Fumes from Use of Cleaning Solvent on Control Room HVAC Damper. Cleaning Solvents Replaced W/Mild Detergent (← links)
- 05000361/LER-1984-080, :on 841219,when Power Interrupted to Associated Ac Bus During Functional Testing of Battery Charger 2B001, Both Containment Purge Isolation Sys & Fuel Handling Isolation Sys Train a Actuated (← links)
- 05000361/LER-1985-006-01, :on 850113,toxic Gas Isolation Sys Train a Actuated.Caused by Hydrocarbon Analyzer Flameout,Which Caused Instrument Failure Actuation Signal.Dirty Filters Replaced & Train a Tested & Restored (← links)
- 05000361/LER-1984-077, :on 841210,control Room Isolation Sys (Cris) Train B Inadvertently Actuated While Instrumentation & Control Technicians Performed 31-day Surveillance.Caused by Failure to Fully Depress Cris Switch (← links)
- 05000361/LER-1984-075, :on 841130,during Routine Review,Found Check Valve Bypass Closed.Caused by Error in Procedure Checklist for Placing Alternate Electric Fire Pump in Svc.Procedure Revised to Include Valve on Checklist (← links)
- 05000361/LER-1984-074, :on 841203,fuel Handling Isolation Sys Train a Actuated Due to Noise Spike on Airborne Monitor Gas Detector 2RE-7822B.Caused by Monitor Sensitivity to Random Noise. Investigation Underway (← links)
- 05000361/LER-1996-004, :on 960411,AF Sys Turbine Drive Pump Relatch Occurred.Caused by EFAS Signal Present.Appropriate Procedures Revised (← links)
- 05000361/LER-1984-073, :on 841130,control Room Isolation Sys Train B Spuriously Actuated by Radiation Monitor 2/3 RI-7825.Caused by Electrical Noise Spike of Unknown Origin.Cause Being Investigated.Sys Reset & Secured (← links)
- 05000361/LER-1985-020, :on 850210,Train B of Toxic Gas Isolation Sys Actuated.Caused by Failure of Fitting in Hydrocarbon Analyzer.Fitting Repaired & Sys Returned to Svc on 850211 (← links)
- 05000361/LER-1984-060, :on 841002,inflatable Seals Between Spent Fuel Storage Pool & Spent Fuel Shipping Container Pit Partially Deflated.Caused by Low Svc Air Pressure.Design Change Will Be Installed & Procedures Will Be Revised (← links)
- 05000361/LER-1984-059, :on 841003,control Room Airborne Radiation Monitors 2/3-7824 & 2/3-7825 Found in Alarm Defeat.Cause Unknown.Monitors Immediately Placed in Normal Mode (← links)
- 05000361/LER-1984-058, :on 840924,97.5 Ci Noble Gas Release Set Off Low Level Alarm on Plant Vent Stack Monitor 3RE-7865.Caused by Pressurized Degas Relief Valve 3PCV0245 Lifting.Design Change Initiated (← links)
- 05000361/LER-1984-057, :on 841003,control Room Isolation Sys (Cris) Train a Spuriously Actuated During Check Source Test.Caused by Premature Removal of Cris Radiation Monitor 2/3RI-7824. Operator Counseled on Proper Test Procedures (← links)
- 05000361/LER-1985-017, :on 850203,7-day Functional Channel Surveillance Test for Source Range Neutron Flux Monitors Exceeded Tech Spec Time Limit.Caused by Personnel Error. Test Completed & Review in Progress (← links)
- 05000361/LER-1984-055, :on 840928,spurious Toxic Gas Isolation Sys Train B Actuation Occurred.Caused by Meter on Toxic Gas Isolation Sys Panel Being Less than Setpoints.Meter Reset (← links)
- 05000361/LER-1985-009, :on 850117,containment Purge Isolation Sys Train a Spuriously Actuated.Caused by Electrical Noise Spikes on Containment Area Radiation Monitor 2RT-7856.Study of Plant Ground Sys Being Performed (← links)
- 05000361/LER-1984-070, :on 841105,during Preparations to Lift Reactor Vessel Head from Pressure Vessel,Horizontal Inflatable Seal Failed & Completely Depressurized.Instrument Air & Nitrogen Backup Pressurization Supplies Isolated (← links)
- 05000361/LER-1984-054, :on 840924,low Level Alarms Received on Plant Ventilation Stack Monitors 2RE-7865 & 3RE-7865.Caused by Failure of South Gas Stripper Preheater Drain Valve SA1901MU702.Valve Repaired (← links)
- 05000361/LER-1996-003, :on 960212,identified Computer Data Error. Caused by Inattention to Detail.C/A:Colss Computer Restarted W/Correct Date (← links)
- 05000361/LER-1985-007, :on 850103,containment Purge Isolation Sys Train B Actuated When Containment Area Radiation Monitor 2RT-7857 Cabinet Opened for Surveillance.Sign Will Be Placed on Door Cautioning Personnel (← links)
- 05000361/LER-1992-011, :on 921005,discovered That Fire Sys Impairment Compensatory Actions Not Performed Per TS 3.7.8.3,due to Cognitive Personnel Error.Officers Involved in Event Received Counseling (← links)
- 05000361/LER-1984-081, :on 841223,both Supply Breakers to Auxiliary Relay Panel 2L-034 Opened.Cause Under Investigation. Personnel Counseled to Identify Appropriate Precautions During Clearance Planning Stage (← links)
- 05000361/LER-1984-076, :on 841222,containment Purge Isolation Sys Train a Actuated Spuriously Due to Electrical Noise Spikes on Containment Area Radiation Monitor 2RT-7856.Cause Under Investigation (← links)
- 05000361/LER-1985-015, :on 850121,discovered That Tech Spec Table 3.7-4b Did Not Reflect Actual Number & Size of Snubbers Installed.Caused by Design Changes Not Being Reflected in Table.Amend to Tech Specs Submitted (← links)
- 05000361/LER-1985-011, :on 850122,during Maint Outage,Isolation Valves on East Side of Fire Water Sys Loop Closed While Valves on West Side Closed.Caused by Personnel Error.Procedures Reviewed (← links)
- 05000361/LER-1985-002, :on 850104,toxic Gas Isolation Sys Train a Actuation Occurred.Caused by Butane Channel Flame Out. Const Workers Instructed to Use Caution When Handling Matl (← links)
- 05000361/LER-1985-001, :on 850103,during Routine Fire Watches in Electrical Tunnel,Security Officers Did Not Respond Properly to Allow Entry.Caused by Failure of Personnel to Implement Revised Access Routing of Firewatch (← links)
- 05000361/LER-1985-004, :on 850101,discovered Weekly Purge Samples Not Taken for Containment Purge Initiated on 841224.Caused by Personnel Error.Chemistry Foremen & Technicians Counseled (← links)
- 05000361/LER-1984-071, :on 841020 W/Unit Defueled & Containment Purge in Progress,Train a Containment Purge Isolation Sys Actuated.Caused by Electrical Noise on Containment Area Radiation Monitor 2RT-7856.Noise Investigated (← links)
- 05000361/LER-1996-001-02, :on 960205,waste Gas Sys H Monitor Was Declared Inoperable.Caused by Blown Fuse.Replaced Blown Fused & Performed Channel Calibr (← links)
- 05000361/LER-1984-069, :on 841109,containment Purge Isolation Sys Actuation Occurred.Caused by Radwaste Being Moved in Vicinity of Monitor.Actions to Prevent Radioactive Items from Being Placed in Vicinity of Monitors (← links)
- 05000361/LER-1984-067, :on 841105,discovered Routine 7-day Surveillance of Battery 2D4 Missed.Caused by Ineffective Oral Notification to Operations of Unsuccessful Surveillance.Procedures Modified (← links)
- 05000361/LER-1989-010, :on 890520,concluded That Main Steam Safety Valve (MSSV) Flow Capacity Less than Nameplate Rating.Mssvs Ring Settings Changed to Be Consistent W/New Recommended Generic Settings (← links)
- 05000361/LER-1983-149-03, /03L-0:on 850305,two 125-volt Batteries Initially Tested on 820206 & 0702 Determined Not load-tested within Test Interval Prior to Dec 1983.Caused by Personnel Error. Mgt Controls Improved (← links)
- 05000361/LER-1984-068, :on 841102,spurious Actuation of Fuel Handling Isolation Sys Occurred.Caused by Instrument Technician Touching High Voltage Potentiometer Lock.Monitor Returned to Svc (← links)
- 05000361/LER-1984-066, :on 841103,polar Crane Malfunctioned.Caused by Minor Degradation of Dual Power Supply Card for Hoist Drive Resulting in Uneven Application of Voltage to Control Circuitry.Degraded Card Replaced (← links)
- 05000361/LER-1984-065, :on 841101,03,08,10 & 13,spurious Actuation of Toxic Gas Isolation Sys Train B Occurred.Caused by Conservative Alarm Setpoint,Electrical Noise,Rapid Temp/ Pressure Changes & Radio Transmissions (← links)
- 05000361/LER-1985-021, :on 850219,fuel Handling Isolation Sys Trains a & B Actuated Due to Increased Radioactive Gaseous Activity in Fuel Handling Bldg.Caused by Open Vent Valve. Procedure Revised to Require Open Vent Tagging (← links)
- 05000361/LER-1984-063, :on 841024,w/unit in Mode 5,train a Containment Purge Isolation Sys Actuated by High Radiation Alarm on Containment Airborne Radiation Monitor While RCS Vented (← links)
- 05000361/LER-1984-062, :on 841023,w/unit in Mode 5 & Containment Purge in Progress,Train a of Containment Purge Isolation Sys Actuated by Instrument Failure Signal from Containment Airborne Monitor Channel C (← links)
- 05000361/LER-1984-079-01, Forwards LER 84-079-01,summarizing Results of Engineering Evaluations for All Deficient Snubbers & Corrective Actions Taken to Preclude Recurrence (← links)
- 05000361/LER-1984-064, :on 841030,train a of Fuel Handling Isolation Sys Inadvertently Actuated.Caused by Personnel Error.All Instrumentation & Control Technicians Cautioned.Keylock Bypass Switch Installation Under Investigation (← links)
- 05000361/LER-1995-016, :on 951127,omission in High Energy Line Break Analysis Occurred.Caused by Original UFSAR Section 3.6A Hypothesized High Energy Line Break Analysis Completed by Plant.Interim Compensatory Review Initiated (← links)
- 05000361/LER-1984-046, :on 840815,train B Saltwater Cooling Flow Less than Required Flow.Caused by Reading Inoperable Channel. Saltwater Cooling Flow Indication Installed (← links)
- 05000361/LER-1985-016, :on 850131,fuel Handling Isolation Sys Train B Actuated Due to Instrument Failure of Fuel Handling Area Vent Radiation Indicator 2R-7823.Caused by High Voltage Power Supply Loss When HV Pushbutton Released (← links)
- 05000361/LER-1985-013, :on 850130,control Room Isolation Sys Train B Spuriously Actuated by Instrument Failure on Control Room Radiation Monitor.Caused by Background Radiation Levels Dropping Below Instrument Failure Setpoint (← links)
- 05000361/LER-1984-048, :on 840822,electrical Power Sys 18-month Surveillance Not Performed Per Tech Specs.Caused by Lack of Procedural Control.Requirement Will Be Proceduralized & Incorporated Into Tech Specs (← links)
- 05000361/LER-1984-049, :on 840824,train a Containment Purge Isolation Sys Actuated.Caused by Electrical Noise Spikes on Containment Area Radiation Monitor 2RT-7856.Electrical Spike Suppression Circuits May Be Added to Monitors (← links)
- 05000361/LER-1984-033, :on 840616,during Hydrostatic Testing of Fire Main Piping,Leakage Occurred Through Hydrostatic Test Boundary Valves,Pressurizing Fire Main Above Operating Pressure.Caused by Cracked Piping (← links)
- 05000361/LER-1995-015, :on 950822,determined RCS Lds Inoperable for About 31 H Due to Containment Atmosphere Particulate RMs Filter Paper Supply Roll Being Inadvertently Installed Upside Down.Paper for Monitors Corrected (← links)
- 05000361/LER-1984-045, :on 840802,leakage Observed Past Plunger Bore Cap of Charging Pump 2P191 & Pump Stopped.On 840805,2P191 Declared Inoperable & Removed from Svc.Dye Penetrant Test Performed 840809 Exposed 3-inch Crack (← links)
- 05000361/LER-1984-047, :on 840811,control Room Isolation Sys Train a Actuated Spuriously.Apparent Cause Due to Noise Spikes on Control Room Airborne Radiation Monitor 2/3 RE-7824. Engineering Evaluation Underway (← links)
- 05000361/LER-1992-010, :on 920506,spurious Train a Toxic Gas Isolation Sys Actuation Occurred Due to Momentary High Ammonia Concentration Signal.Caused by Intermittent Electronic Problem or Noise Spike.Train Returned to Svc (← links)
- 05000361/LER-1990-016-02, :on 901206,automatic Reactor Trip Occurred Due to non-1E Uninterruptible Power Sys Failure.Preventive Maint Program Modified to Require Periodic Cleaning of non-1E UPS Cabinet Internals During Refueling Outages (← links)
- 05000361/LER-1984-035, :on 840625,during Main Purge,Containment Airborne Radiation Monitor 2RE-7804 Reached Alarm Setpoint & Initiated Train a Containment Purge Isolation Sys.Caused by Tube Leak Repair Work (← links)
- 05000361/LER-1984-043, :on 840808,penalty Factor from Control Element Assembly Calculator Caused CPC to Generate Low DNBR Trip Signals to Reactor Protection Sys.Caused by Spurious Rod Position Indications (← links)
- 05000361/LER-1992-008-01, :on 920424,automatic Turbine Trip/Reactor Trip Occurred.Caused by Failure of Transformer 2B13X.Transformer Was Replaced (← links)
- 05000361/LER-1992-007, :on 920226,TDAFWP P-140 Tripped on Overspeed During Startup for Inservice Test Surveillance.Caused by Introduction of Accumulated Condensed Steam Into Pump Turbine.Replaced Clogged Steam Trap Strainer (← links)
- 05000361/LER-1984-042, :on 840730,spurious Toxic Gas Isolation Sys Actuation Occurred.Caused by Overly Conservative Alarm Setpoints.Tech Spec Amend Requesting More Appropriate Setpoints Proposed (← links)
- 05000361/LER-1992-004, :on 920218,dye-penetrant Exam of Pressurizer Vapor Space Level Instrument Nozzle Revealed Presence of Crack.Caused by Primary Water Stress Corrosion Cracking. Vapor Nozzles Will Be Replaced W/Inconel 600 (← links)
- 05000361/LER-1995-017, :on 951207,toxic Gas Isolation Sys Monitor Setpoint & Propane Trip Setpoint Was Less than 193 Ppm. Because Personnel Did Not Establish Appropriate Butane Setpoint to Envelope Propane TS Limit (← links)
- 05000361/LER-1984-040, :on 840723,main Steam Isolation Sys Inadvertently Actuated.Caused by Technician Error & Weakness W/Procedural Precautions.Procedure SO23-II-1.6 Amended (← links)
- 05000361/LER-1984-036, :on 840629,HPSI Isolation Valve 34V9327 Failed to Stroke During Surveillance on HPSI Check Valves.Caused by Excessive Wear on Stem & Retaining Ring.Valves Showing Free Stem Movement Repaired & Returned to Svc (← links)
- 05000361/LER-1984-039, :on 840712,inservice Insp Test of Unit 2 & 3 Component Cooling Water Outlet Valves (HV-6500 & HV-6501) Missed.Caused by Administrative Oversight.Procedural Controls Validated (← links)
- 05000361/LER-1984-038, :on 840708,23 & 26,control Room Isolation Sys Train a Spuriously Actuated from Noise Spike on Control Room Airborne Radiation Monitor 213RE-7824.Caused by Electrical Noise Spikes of Unknown Origin (← links)
- 05000361/LER-1995-011, :on 950605,fire Dampers Failed Due to Long Term Matl Degradation.Completed Repair & Replacement of All 54 Impaired Dampers & Svc Any Fire Damper Not Tested (← links)
- 05000361/LER-1992-008, :on 920218,primary Water Stress Corrosion Cracking of Pressurizer Instrument Nozzles.Noted.Caused by Rust & Boric Acid Crystals.Nozzle Replaced & Interim Repair Will Be Implemented (← links)
- 05000361/LER-1984-037, :on 840627,spurious Actuation of Toxic Gas Isolation Sys Occurred.Caused by Overly Conservative Alarm Setpoints.Tech Spec Amend Submitted 840427 Requesting More Appropriate Settings (← links)
- 05000361/LER-1984-053, :on 840919,fuel Handling Isolation Sys Train B Spuriously Actuated When Power Supply to Control Module for Fuel Handling & Vent Airborne Monitor Gas Detector 2RE-7823-2 Deenergized for Sys Mod Work (← links)
- 05000361/LER-1984-052, :on 840903,06 & 11,spurious Toxic Gas Isolation Sys on Trains a & B Actuated,Respectively.Caused by Overly Conservative Alarm Setpoints.Sys Instrumented W/Recorders to Determine Which Analyzer Caused Trip (← links)
- 05000361/LER-1984-051, :840829,safety Injection Tanks 10 & 7 Inoperable Due to Leakage Through Fill & Drain Valve.Caused by Installation of Valve Fuses on Tank 10 & Nitrogen Cover Pressure Exceeding Limits of Operation (← links)
- 05000361/LER-1984-050, :on 840826,reactor Tripped in Response to Low DNBR & Local Power Density Trip Signal on Channels B & C of Reactor Protection Sys.Caused by Core Protection Calculator Auxiliary Trip Due to Conservative Algorithms (← links)
- 05000361/LER-1984-032, :on 840528,30,31,0603,07,14,18,19 & 23, Spurious Toxic Gas Isolation Sys Actuated.Caused by Conservative Alarm Setpoints.Tech Spec Amend to Permit More Appropriate Setpoints Proposed (← links)
- 05000361/LER-1984-031, :on 840525,during Performance of Routine Surveillance on Toxic Gas Isolation Sys,Emergency Chiller E-336 Inadvertently Started.Caused by Technician Error. Program Timer & Microswitch Replaced (← links)
- 05000361/LER-1995-014, :on 950813,TS Surveillance Was Missed Due to Lack of Alarm.Returned Control of Breaker to Automatic on 950813 (← links)
- 05000361/LER-1984-028, :on 840505,waste Gas Sampling Sys Pressure Control Valve 2/3PCV0582 Failed Open,Resulting in Flow Through Sample Pump Discharge Relief Valve 2/3PSV0580 Into Waste Gas Discharge Header.Valve Replaced (← links)
- 05000361/LER-1984-027, :on 840502,backleakage of Flow from Waste Gas Compressor C010 Through Discharge Check Valve Into Standby Compressor C011 Resulted in Release Via C011 Rupture Disc. Rupture Disc Replaced (← links)
- 05000361/LER-1984-015, :on 840306,fire Program Discrepancies Found During Preparation of Fire Hazard Analysis (FHA) & Review of IE Info Notice 84-09.Compensatory Measures & Rev to FHA Implemented (← links)
- 05000361/LER-1984-026, :on 840427,spurious Toxic Gas Isolation Sys Actuations Occurred.Caused by Very Conservative Setpoints. Sys reset.Long-term Corrective Actions Include Reanalyzing Setpoint Basis & Submitting Tech Spec Rev (← links)
- 05000361/LER-1991-017-01, :on 911113,determined That RCS Samples Obtained on 911111 Not Analyzed for Fluoride within TS 3/4.4.6 Time Limit.Caused by Personnel Error.Event Reviewed W/Chemistry Personnel & Training Provided (← links)
- 05000361/LER-1984-025, :on 840423,undervoltage Trip Device for Reactor Trip Breaker 256A4002-656-18 Exhibited Procedurally Unacceptable Response Times.Cause Unknown.Breaker Will Be Returned to GE for Refurbishment (← links)
- 05000361/LER-1992-002, :on 920209,CR Isolation Sys Actuation,Automatic Start of EDG 3G002 Occurred Due to de-energization of ESFs Actuation Sys Power Supply.Esfas Dc Power Supply Breaker Reclosed (← links)
- 05000361/LER-1992-003, :on 920211,control Room Isolation Actuation & Automatic Start of Emergency Diesel Generator 3G002 Occurred.Caused by Deenergization of ESF Actuation Sys Power Supply.Event Was Reviewed W/Personnel (← links)
- 05000361/LER-1983-053-03, /03L-0:on 830519,containment Atmosphere Gaseous Radioactivity Monitors RI-7804C & RI-7807C Inoperable.Caused by Unidentified & Unauthorized Manipulation of Setpoint Controller.Setpoint Recalibr (← links)
- 05000361/LER-1984-029, :on 840614,breaker 3BO417 Inadvertently Tripped,Deenergizing Load Ctr Bq.Caused by Personnel Error in Tripping Wrong Breaker During Charging of Pump Power Supply.Operator Counseled (← links)
- 05000361/LER-1984-034, :on 840611,continuous Fire Watches Not Established While Fire Main Isolated to Perform Piping Mods. Caused by Miscommunication.Personnel Reviewed Event & Need to Prevent Miscommunication Stressed (← links)
- 05000361/LER-1984-013, :on 840305,containment Pressure Exceeded Tech Spec Limits.Caused by Misinterpretation of Venting Procedure.Operators Interpreted Procedure to Require 2 H Venting.Operators Counseled Re Procedure (← links)
- 05000361/LER-1984-012, :on 840301,spurious Toxic Gas Isolation Sys (Tgis) Actuation Occurred.Caused by Unnecessary Conservatisms in Tgis Setpoint.Basis for Setpoint Will Be Reanalyzed & Tech Specs Amended (← links)
- 05000361/LER-1984-016, :on 840309,technician Inadvertently Actuated Safety Injection,Containment Cooling & Containment Spray Activation Sys.Caused by Technician Error.Procedural Changes Implemented (← links)
- 05000361/LER-1984-011, :on 840225,containment Purge Isolation Sys Actuated When Containment Airborne Monitor 2RE-7804 Gaseous Channel C Failed.Caused by Water in Gaseous Detector Cell, Short Circuiting pre-amp.Water Removed (← links)
- 05000361/LER-1995-013, :on 950718,recognized That Sf Handling Machine (Sfhm) Operated Over SFP on 950207 W/O Train a Post Accident Cleanup Unit (Pacu) in Operation Contrary to Ts.Required Monthly 10-h Operation for Pacu E-371 Performed (← links)
- 05000361/LER-1984-009, :on 840214,analysis of Startup Test Data Established Calculated Thermal Power Calculated by Core Protection Calculators May Become Decalibr Relative to Secondary Calorimetric Power.Procedure Changed (← links)
- 05000361/LER-1995-012, :on 950707,Unit 2 Containment Air Lock Door Seal Test Did Not Meet Literal TS Requirements Due to Typo in Ts.Revised Containment Air Lock Seal Test Procedure to Ensure Compliance W/Literal Wording of TS for Both Units (← links)
- 05000361/LER-1984-001-01, :on 840111,preparation of Updated Fire Hazards Analysis Resulted in 91 Nonconformance Repts (NCR) Re Fire Protection Program Deficiencies.Compensatory Measures Established.Ncr Dispositions Planned (← links)
- 05000361/LER-1991-019-01, :on 911125,inoperable Containment Pressure Instrumentation Noted.Caused by Mislabeled Wiring from Instrument Line Isolation Valve.Isolation Valve Repaired (← links)
- 05000361/LER-1983-152-03, /03L-0:on 831213,while in Mode 4,remote Shutdown Boronometer 2AI-0203B Found Inoperable.Caused by Failed Display.Display Unit Replaced (← links)
- 05000361/LER-1983-092-03, /03L-0:on 831218,containment Airborne Radiation Monitor Rendered Inoperable When Sample Pump Motor Breaker Tripped.Caused by Insufficient Margin Between Motor Operating Current & Thermal Overload Setpoint (← links)
- 05000361/LER-1991-014, :on 910910,turbine-driven Auxiliary Feedwater Pump P-140 Steam Supply Check Valve MU-005 Found Damaged. Caused by Valve Disc Separating from Pins & Lodging in Valve Outlet Body.Replacement Valve Installed (← links)
- 05000361/LER-1991-018, :on 911015,several Instrument Modules Were Missing Upper &/Or Lower Guide Rails &/Or Vibration Dampening Matl,Causing Equipment to Not Conform to Vendor Design Requirements.Investigation Continuing (← links)
- 05000361/LER-1991-016-01, :on 911010,control Room Isolation Sys,Train B, Spurious Actuation Occurred.Caused by Momentary Instrument Failure of Train B Particulate/Iodine Channel.Filtering Circuit Added to Ac Input to Monitor Module (← links)
- 05000361/LER-1995-003, :on 950225,discovered Cracking in Rotor Discs. Caused by Stress Corrosion Cracking.Cracks Removed by Excavation (← links)
- 05000361/LER-1995-009, :on 950511,EDG Initial Step Load Should Have Been 20% Higher than 1,720 Kw.Caused by Bechtel Who Did Not Recognize That Lovs May Cause Larger EDG Initial Step Load than Lovs W/Sias.Revised Appropriate Load Circuitry (← links)
- 05000361/LER-1991-014-01, :on 910910,turbine-driven Auxiliary Feedwater Pump P-140 Steam Supply Check Valve MU-005 Found Damaged. Caused by Water Entrained in Steam Flow.Check Valve Removed & Replaced in-kind (← links)
- 05000361/LER-1991-008-01, :on 910622,toxic Gas Isolation Sys Actuation Occurred in Response to Apparent High Ammonia Signal Detected by Train a Analyzer.Caused by Erratic Rotation of Chopper Motor.Motor Replaced (← links)
- 05000361/LER-1991-003-01, :on 910310,unit 2 Automatic Reactor Trip Occurred.Caused by Failed Control Element Drive Mechanism Control Sys Motor Generator.Relay Replaced & Proportional Band of Controller Increased (← links)
- 05000361/LER-1995-007, :on 950331,incorrect Rod Shadowing Factors in Core Protection Calculators Occurred.Caused by Incorrect Values Provided by ABB Ce.Revised Reload Power Ascension Procedure to Include Addl Data Verification Steps (← links)
- 05000361/LER-1984-024, :on 840424,discrepancies Involving Cable Separation & Fire Wraps Identified in Three Nonconformance Repts.Cables or Cable Trays Will Be Wrapped or Separated or Fire Hazards Analysis Revised (← links)
- 05000361/LER-1984-022, :on 840330 & 0410,control Room Isolation Sys Train Spuriously Actuated from Spike on Control Room Airborne Radiation Monitor.Caused by Spurious Electrical Spikes.No Corrective Action Planned (← links)
- 05000361/LER-1984-021, :on 840330,0405,07,10-12,15,19,22 & 23. Spurious Toxic Gas Isolation Sys Actuations Occurred.Caused by Conservative Setpoints Which Contained Unnecessary Conservatisms.Setpoints Will Be Reanalyzed (← links)
- 05000361/LER-1984-019, :on 840324,while at 100% Power,False Position Indication for Control Element Assembly (CEA) 20 on CEA Calculator (Ceac) 1 Resulted in Penalty Factors,Causing Reactor Trip.Specific Cause Undetermined (← links)
- 05000361/LER-1984-020, :on 840326,w/unit in Mode 2 at 2% Power,Reactor Trip Occurred on High Steam Generator Level.Caused by Overfeeding Steam Generators During Manual Operation of Feedwater Control Sys (← links)
- 05000361/LER-1984-018, :on 840324,remaining Control Room Isolation Sys Radiation Monitor 2/3RT-7825 Declared Inoperable.Caused by Low Flow Alarm Due to Dirty Filter.Filter Changed & Monitor Returned to Svc (← links)
- 05000361/LER-1995-004, :on 941114,valve Release Weight Stuck & Did Not Drop Upon Electronic Actuation & Valve Did Not Open as Required.Replaced Incorrectly Mfg Weight Switch on 950126 & Ensured Correct Positioning (← links)
- 05000361/LER-1984-017, :on 840321,shutdown Cooling HX Flow Control Valve 2HV9316 Discovered Locked Fully Open.Caused by Disengaged Handwheel Clutch.Surveillance Position Revised to Verify Handwheel Engaged (← links)
- 05000361/LER-1982-169-03, /03L-0:on 821212,low Pressure Turbine Stop Valve 24V-2200R Located on Low Pressure Turbine 2 Failed to Fully Close Following Turbine Trip.Caused by Galling Between Disc Stub Shaft & Casing Bore.Shaft Machined (← links)
- 05000361/LER-1982-166-03, /03L-0:on 821210,diesel Generator 2G003 Rendered Inoperable Due to Failure of Electrical Governor.Caused by Burnt Resistor in Power Supply for Control Unit.Governor Power Supply Replaced (← links)
- 05000361/LER-1982-164-03, /03L-0:on 821209,diesel Generator 2G002 Failed to Regulate at 60 Hz Due to Failure of Electrical Governor. Caused by Burnt Resistor in Power Supply for Control Unit. Power Supply Replaced (← links)
- 05000361/LER-1982-167-03, /03L-0:on 821218,w/both Units in Mode 5,control Room Emergency Chiller E-336 Tripped on High Bearing Temp & Declared Inoperable.Caused by Faulty Solenoid Valve for Motor Oil Cooling Unit of Chiller.Valve Replaced (← links)
- 05000361/LER-1982-150-01, /01T-0:on 821229,Kerotest Valve Incorrectly Installed Restricting Flow Through Liquid Radwaste Monitor RT-7813.Caused by Improper Installation.Valve Realigned & Liquid Effluent Releases Sampled (← links)
- 05000361/LER-1995-008, :on 950412,TS 3.0.3 Entry Occurred Due to Inoperable Containment Emergency Cooling Fans.Removed Fan Immediately Upon Discovery (← links)
- 05000361/LER-1995-006, :on 950406,RCS Dissolved Oxygen Found Out of Specification.Caused by Failure to Follow Procedure.Returned Oxygen Level to Below TS Steady State Limit by Addition of Hydrazine (← links)
- 05000361/LER-1995-005, :on 950406,loss of Pressurizer Level Occurred Due to Valve Alignment Error.Terminated Event at 0207 When Licensee Reclosed mini-flow Isolation Valves (← links)
- 05000361/LER-1983-144-03, /03L-0:on 831202 & 22,excessive Oxygen Concentration Occurred 11 Times for Short Durations in Waste Gas Holdup Sys.Cause Undetermined (← links)
- 05000361/LER-1983-107-03, /03L-0:on 831205,w/unit in Mode 5,Zone 17 Diesel Generator Bldg Preaction Flame Detector 2BSH8974 Alarmed & Could Not Be Reset.Caused by Faulty Component on Circuit Card.Fire Watch in Effect (← links)
- 05000361/LER-1983-153-13, /13X-0:on 831204,during Surveillance Testing, Undervoltage Trip Devices of Reactor Trip Breakers 1 & 4 Exhibited Scattered & Unacceptable Response Times.Reactor Trip Breakers Replaced (← links)
- 05000361/LER-1983-147-03, /03L-0:on 831121,train a Control Room Fan Failed to Start Automatically on Toxic Gas Isolation Sys Signal. Caused by Spurious Failure of Relay in Unit 2 Power Source. Fan Aligned to Unit 3 Power Source (← links)
- 05000361/LER-1983-151-03, /03L-0:on 831114,w/unit in Mode 1,reactor Manually Tripped Due to Unexpected Pressurizer Pressure & Level Decrease.Caused by Operator Opening Emergency Boration Valve 2HV-9247.Training Program Revamped (← links)
- 05000361/LER-1982-010-03, Fire Detection Panels in Zones 1,9 & 28 Failed Surveillance Test S023-I-2.62.Caused by Component Failure (← links)
- 05000361/LER-1983-095-03, /03L-0:on 830303,two Heat Detectors in Zone 53 Failed 6-month Surveillance Test S023-I-2.62.Heaters Found Bent & Broken Due to Unknown Causes.New Detectors Installed & Retested (← links)
- 05000361/LER-1983-094-03, /03L-0:on 830217,Unit 2 Fire Detector Electrical Panel 2L-204 Failed Surveillance Test & on 830222,Unit 3 Panel 3L-204 Failed Same Test.Caused by Disconnected Supervisory Circuits as Result of Mods (← links)
- 05000361/LER-1983-093-03, /03L-0:review of Records Showed That Annual Surveillance Test S023-3-3.36.1 for 10 Fire Suppression Valves Due 830209 Not Completed.Caused by Valves Having Been Removed from Svc.Surveillance Completed on 831005 (← links)
- 05000361/LER-1982-177-03, /03L-0:review of 1982 Records Revealed That Monthly Surveillance Test S023-X111-49 for Fire Doors Due on 820409 & 0609 Not Completed.Caused by Administrative Oversight.Surveillance Completed on 820412 & 0615 (← links)
- 05000361/LER-1982-172-03, /03L-0:on 821212,review of Records Showed That Monthly Fire Hose Surveillance Test S023-X111-54,due 821212, Not Completed.Caused by Procedural & Training Inadequacies. Surveillance Completed on 830103 (← links)
- 05000361/LER-1983-148-03, /03L-0:on 831122,diesel Driven Fire Pump Starting Battery Found to Have Low Electrolyte Level & Pump P220 Declared Inoperable.Caused by Evaporation of Electrolyte. Battery Refilled & Station Procedure Revised (← links)
- 05000361/LER-1983-150-03, /03L-0:on 831117,power Supply Overload Protection Circuit in Fire Detection Data Gathering Panel 31-198-2 Declared Inoperable.Cause Undetermined.Circuit Reset, Returning Panel to Svc (← links)
- 05000361/LER-1991-011-01, :on 910830,control Room Isolation Sys Train B Spurious Actuation Occurred.Cause of Actuation Unknown. Design Change to Reduce Radiation Monitor Susceptibility to Noise Being Prepared (← links)
- 05000361/LER-1983-143, Has Been Canceled (← links)
- 05000361/LER-1983-140-03, /03L-0:on 831027,local Controller Shutoff Switch for Electrically Driven Fire Pump P221 Discovered Open.Cause Could Not Be Determined.Switch Closed & Pump Operability Restored (← links)
- 05000361/LER-1991-010-01, :on 910803 & 18,control Room Isolation Sys Train B Spurious Actuation Occurred When Sensed Background Count Rate Decreased Below Instrument Failure Setpoint. Detector & Module Replaced (← links)
- 05000361/LER-1983-138-03, /03L-0:on 831021,containment Isolation Valve 2HV7258 Failed to Close During Waste Gas Quarterly Valve Test.Caused by Loose Connection on Terminal Block in Closing Circuit.Connection Tightened (← links)
- 05000361/LER-1983-127-03, /03L-0:on 831020,28 fire-rated Assemblies in Various Zones Inoperable.Caused by Design or Const Errors. Compensatory Measures in Place Until Rated Assemblies Repaired (← links)
- 05000361/LER-1983-126-03, /03L-0:on 831018,review of Nuclear Instrumentation Sys Safety Channel Drawer Records Indicated Surveillance for Channels A,B & D Not Completed within Required Interval. Caused by Personnel Error (← links)
- 05000361/LER-1983-137-03, /03L-0:on 831020,train a Containment Emergency Cooling Unit 2E-399 Failed to Meet Tech Spec Acceptance Criteria.Caused by Failure of Outlet Valve to Open Completely.Related Unit 3 Event on 831019 (← links)
- 05000361/LER-1983-136-03, /03L-0:on 831021,ground Fault Alarm Received on Data Gathering Panel for Fire Zones 44 & 83.Panel Declared Inoperable & Compensatory Fire Watches Established.Cause Unknown.Fault Cleared.Sys Returned to Svc (← links)
- 05000361/LER-1983-139-03, /03L-0:on 831024,train B Chlorine Analyzer Spuriously Initiated & Declared Inoperable.Caused by Defective Silicon Control Rectifier in Circuit Board & Defective Electrode Assembly (← links)
- 05000361/LER-1983-133-03, /03L-0:on 831007,reactor Trip Occurred.During post-review Noted That ex-core Linear Power Level Channel C Failed.Caused by Failed Linear Amplifier Card.Card Replaced (← links)
- 05000361/LER-1983-135-03, /03L-0:on 831016,core Protection Calculator Channel C Declared Inoperable.Cause Could Not Be Determined. Trip Considered Spurious.Channel Declared Operable (← links)
- 05000361/LER-1983-097-03, /03L-0:on 831017,spurious Fire Protection Sys Deluge Actuation Occurred in North Cable Riser Area of Control Bldg.Cause Unknown.No Fire or Smoke Observed in Area.No Corrective Action Planned (← links)
- 05000361/LER-1983-129-03, /03L-0:on 831016,calculations Indicated That DNBR Margin Not within Allowable Limits.Cause & Corrective Action to Prevent Recurrence Under Review.Dnbr Margin Verified within 1 H by Restoring Core Limit (← links)
- 05000361/LER-1995-002, :on 950211,soft Seated Mfivs,Intended for Maintenance & Insp,Found Inoperable.Caused by Personnel Error.Individuals Responsible Received Counsel & Procedures Revised (← links)
- 05000361/LER-1983-141-03, /03L-0:on 831007 & 09,reactor Tripped on Low DNBR Signal When Control Element Assembly Calculator 1 Generated Excessive DNBR Penalty Factors.Caused by Failure of Isolation Amplifier Card.Card Replaced (← links)
- 05000361/LER-1983-128-03, /03L-0:on 831007,containment Airborne Radiation Monitor 2RT-7804 Channel C Discovered in Alarm Defeat.Cause Not Stated.Channel C Reset.Administrative Controls on Monitor Being Revised (← links)
- 05000361/LER-1983-132-03, /03L-0:on 831008,remote Shutdown Monitoring Instrumentation Pressure Indicator 2PI-1013C3 for Steam Generator E-089 Declared Inoperable.Caused by Failure of Lumigraph Assembly.Assembly Replaced (← links)
- 05000361/LER-1983-131-03, /03L-0:on 831001,DNBR Margin Noted Not within Tech Spec Limits.Caused by Inherent Conservatism in Procedure SO23-3-3.b Causing DNBR to Be Outside Limits During Small Power Changes.No Corrective Actions Planned (← links)
- 05000361/LER-1983-125-01, During Reactor Trip Breaker Surveillance,Breakers 4,5 & 6 Demonstrated Anomalous Behavior When Undervoltage Devices Tested.Cause Under Investigation (← links)
- 05000361/LER-1983-096-03, /03L-0:on 831001,control Element Assembly (CEA) 19 (Shutdown Group G) Slipped to 99 Inches During Mode 1 at Approx 50% Power.Caused by Dirty Contacts on CEA Timer Card. Timer Card Contacts Cleaned (← links)
- 05000361/LER-1983-121-03, /03L-0:on 830927,calculations Indicated That DNBR Margin Not within Allowable Limits.Cause Unknown.Acceptable DNBR Margin Verified within 15 Minutes by Restoring Core Operating Limit Supervisory Sys (← links)
- 05000361/LER-1984-005-01, :on 840127,while in Mode 5,w/purge/vent Stack wide-range Monitor 3RT-7865 & Flow Rate Monitor Out of Svc for Installation of Noise Suppression Circuit,Flow Rate Estimates Not Performed as Required (← links)
- 05000361/LER-1983-143-03, /03L-0:on 830316,snubber on 8-inch Demineralized Water Makeup & Transfer Line Between Condensate Storage Tanks Discovered Frozen.Caused by Internal Damage.Snubber Replaced on 840328 (← links)
- 05000361/LER-1984-007, :on 840203 & 04,Train a & B Main Steam Isolation Sys Spuriously Actuated on Low Pressure Signal from E-088.Caused by Voltage Fluctuation Resulting from Electrical Realignments,Testing & Maint (← links)
- 05000361/LER-1983-123-03, /03L-0:on 830913,w/Unit 2 in Mode 1 & Unit 3 in Mode 3,insp of Electrical Penetrations Revealed Two Holes in Penetration Seals in Auxiliary Bldg Control Area.Caused by Procedural Deficiencies During Const (← links)
- 05000361/LER-1983-124-03, /03L-0:on 830917 & 23,control Element Assembly Calculator Declared Inoperable Due to Spurious Position from Control Element Assembly 20.Caused by Defective Board & Connector.Equipment Replaced (← links)
- 05000361/LER-1984-006, :on 840103,spurious Toxic Gas Isolation Sys Actuations Occurred.Caused by Toxic Gas Isolation Sys Setpoint Set at Threshold Level of Detection.Tech Specs Revised to Raise Setpoint Requirements (← links)
- 05000361/LER-1984-002-01, :on 840130-0203,containment Purge Isolation Sys Spuriously Actuated.Caused by Electrical Noise Spike on Train B Containment Airborne Monitor 2RT7807.Use of Addl Suppression Circuit Being Investigated (← links)
- 05000361/LER-1984-003-01, :on 840122,containment Purge Isolation Sys Actuated When Gaseous Activity Alarm Setpoint Reached Train a Containment Airborne Monitor 2RT7804.Caused by Increase in Containment Background Radiation (← links)
- 05000361/LER-1983-115-03, /03L-0:on 830829,toxic Gas Isolation Sys Train a Ammonia Analyzer Declared Inoperable.Failure Caused by Change in Amplifier Gain.Amplifier Board & Analyzer Recalibr (← links)
- 05000361/LER-1983-117-01, /01T-0:on 830905,pressurizer Level Instrument 2LI-0103A on Essential Plant Parameter Monitoring Sys Panel 2L-411 Varied from Correct Reading by Approx 15%.Level Correction Applied (← links)
- 05000361/LER-1983-119-03, /03L-0:on 830828,Group 6 Control Element Assemblies (CEA) Inserted to Control Axial Shape Index. Reactor Coolant Cold Leg Temp Observed Below Limits.Caused by Effects of Xenon build-in & CEA Insertion (← links)
- 05000361/LER-1983-114-03, /03L-0:on 830825,while in Mode 1,containment Isolation Valve 2HV-0512 Gave Dual Position Indication. Cause Unknown.Investigation Suspended Pending Containment Entry During Next Outage (← links)
- 05000361/LER-1983-113-03, /03L-0:on 830825,while in Mode 1,shiftly Surveillance on Control Element Assembly Calculator 2 Revealed That Three Auto Restarts Occurred within 12 H. Caused by Poorly Seated Disc Interface Card (← links)
- 05000361/LER-1983-075-03, /03L-0:on 830828,regulating Control Element Assembly Group 6 Exceeded Time Allowed for long-term steady-state Insertion Limit.Caused by Use of Assemblies to Control Axial Shape Index Oscillations (← links)
- 05000361/LER-1984-004, :on 840116,train a Containment Purge Isolation Sys Spuriously Actuated.Caused by Subgroup Relay Actuation Voltage Transient on ESF Bus.No Corrective Action Planned as Minor Transients Expected in Test (← links)
- 05000361/LER-1983-120-03, /03L-0:on 830829 & 31,flow Control Valve 2FV-0318 for Iodine Removal Sys Failed to Open & Declared Inoperable.Caused by Cracked O-ring Allowing High Pressure Oil to Leak to Low Pressure Side (← links)
- 05000361/LER-1983-116-03, /03L-0:on 830823,0902,04 & 08,calculations Indicated DNBR Margin Not within Limits.Acceptable Margin Verified within 15 Minutes by Restoring Core Operating Limit Supervisory Sys to Svc (← links)
- 05000361/LER-1984-001, :on 840111,preparation of Fire Hazard Analysis & Review of Fire Protection Surveillance Results Identified Deficiencies in Fire Protection Program.Review in Progress. Complete Rept Will Be Submitted by 840228 (← links)
- 05000361/LER-1983-118-03, /03L-0:on 830911,containment Isolation Valve 2HCV-9945 Found Locked Open.Caused by Valve Incorrectly Positioned on 830906.Isolation Valve Returned to Proper Position.Appropriate Disciplinary Action Taken (← links)
- 05000361/LER-1983-048-01, /01T-0:on 830821,train B Emergency Chiller E-335 Failed to Start.Caused by Fuse Failure.Correct Size Fuse Installed (← links)
- 05000361/LER-1983-110-01, /01T-0:on 830821,train B Emergency Chiller E-335 Failed to Start.Caused by Fuse Failure.Correct Size Fuse Installed (← links)
- 05000361/LER-1983-098-03, /03L-0:on 830813,control Element Assembly Calculator 2 Declared Inoperable Due to Inaccurate Position Indication on Three Target Control Element Assemblies for Core Protection Calculation Channel D (← links)
- 05000361/LER-1983-109-03, /03L-0:on 830806,during Inservice Insp,Containment Isolation Valve 2HV-0510 Gave Dual Indication Following Demand to Close.Caused by Lower Limit Switch Out of Adjustment.Limit Switch Adjusted (← links)
- 05000361/LER-1983-108-03, /03L-0:on 830809,turbine Governor Valve 2UV2200B Failed to Reopen After Trip Solenoid a Testing.Caused by Stuck Unitized Actuator Dump Valve Plunger.Solenoid Valve Replaced (← links)
- 05000361/LER-1983-099-03, /03L-0:on 830808,pressurizer Level Instrumentation Declared Inoperable When Recorder Pen Failed to Track.Caused by Insufficient Operating Clearances.Components Replaced.W/ (← links)
- 05000361/LER-1983-112-01, /01T-0:on 830826,w/Units 2 & 3 in Modes 1 & 3, respectively,41 Heat Detectors in Zone 12 Identified, Constituting Less than Required Number.Cause Not Determined. Addl Detector Will Be Installed (← links)
- 05000361/LER-1983-100-03, /03L-0:on 830808,component Cooling Water Return Containment Isolation Valve HV-6373 Declared Inoperable When Control Power to HV-6373 Was Lost.Caused by Shorted Fuse. Fuse Replaced (← links)
- 05000361/LER-1983-104-03, /03L-0:on 830809,during Routine Visual Insp,Purge/ Vent Stack Monitor 2RI-7865 Discovered W/Low Flow.Caused by Apparent Unauthorized Valve Manipulation.Valve Opened & Proper Flow Restored (← links)
- 05000361/LER-1983-156-03, /03L-0:on 831222,snubber S2-ST-017-H-009 Determined to Be Binding in Compression Mode.Caused by Inadequate Administrative Controls.Engineering Procedure SO123-V-5.1 Revised (← links)
- 05000361/LER-1983-079-01, /01T-0:on 830804,while in Mode 1 During Routine Control Room Tour,Msiv 2HV-8249 Would Not Close & Declared Inoperable.Cause Unknown.Valve Will Remain Closed for Investigation (← links)
- 05000361/LER-1983-088-03, /03L-0:on 830719,Channel D Plant Protection Sys Power Supply Voltage Found Out of Range.Caused by Normal Operation.New Power Supply Installed (← links)
- 05000361/LER-1983-081-03, /03L-0:on 830718,turbine Stop Valve 2UV-2200E Failed to Reopen After Stroking Closed Per Procedure.Caused by Grit in One Solenoid Dump Valve in Unitized Actuator. Solenoid Valve Replaced.Actuator Oil Filtered (← links)
- 05000361/LER-1983-041-01, /01T-0:on 830706,while in Mode 5,circulating Water Sys Traveling Screen Water Level Differential Pressure Found Off Scale.Caused by Dislodged Screen Panels,Resulting in Debris in Pump Forebay (← links)
- 05000361/LER-1983-072-01, /01T-0:on 830706,while in Mode 4,circulating Water Sys Traveling Screen Water Level Differential Pressure Found Off Scale.Caused by Dislodged Screen Panels,Resulting in Debris in Pump Forebay (← links)
- 05000361/LER-1983-074-01, /01T-0:on 830712,turbine Bldg Sump Effluent Monitor 2RT-7821 Declared Inoperable Because Scheduled Grab Sample Not Taken & Analyzed within Last of Three 8 H Periods.Caused by Administrative Oversight (← links)
- 05000361/LER-1983-145-03, /03L-0:on 831220,plant Protection Sys Channel C ex-core Safety Channel Linear Power Signal Varied from CPC Channel C Calibr Linear Power Signal by 10%.Caused by Unadjusted Signal.Channel Calibr (← links)
- 05000361/LER-1983-155-03, /03L-0:on 831221,control Element Assembly Calculator (Ceac) 1 Inoperable Due to Spurious Position Indication on Control Element Assembly 20.Cause Undetermined.Test Performed Satisfactorily (← links)
- 05000361/LER-1983-013-03, /03L-0:on 830120,radiation Monitor RI-7807 Lost Sample Flow & Declared Inoperable.Caused by Burned Out Light Diode Unit in Sample Flow Controller.Diode Replaced (← links)
- 05000361/LER-1991-015-01, :on 911001,containment Purge Isolation Sys Train a Actuation Occurred While Performing Radiography. Cause Not Stated.Health Physics Procedures Modified & Training Will Be Conducted (← links)
- 05000361/LER-1983-154-03, /03L-0:on 831211,during Mode 5 Outage,Channel a Pressurizer Level Transmitter 2LT-0110-1 Found Inoperable During Performance of 18-month Calibr.Caused by Empty Ref Leg.Leg Filled (← links)
- 05000361/LER-1991-013-01, :on 910905,Train a Toxic Gas Isolation Sys Actuated.Caused by Inattention to Detail (Cognitive Error) by Operator.Operator Received Appropriate Disciplinary Action.Event Reviewed W/Personnel (← links)
- 05000361/LER-1991-012-01, :on 910829,determined That Coaxial Connectors for Containment high-range Radiation Monitor Inboard Penetration Encls Not Environ Qualified.Caused by Weaknesses in Qualification Program.Drawings Revised (← links)
- 05000361/LER-1983-130-01, /01T-0:on 831021,train B Emergency Chiller E-335 Tripped Following Power Supply Realignment.Caused by Spurious Trip from Control Circuit.No Further Corrective Actions Required (← links)
- 05000361/LER-1995-001, :on 950116,two Firewatch Contractors Were Involved in Physical Altercation.Caused by Firewatch Union Accounting/Financial Matter.No Firewatch Postings Were Missed (← links)
- 05000361/LER-1983-122-03, /03L-0:on 830914,core Protection Calculator Channel D Observed to Have More than Three Auto Restarts in Previous 12 H Period.Caused by Failure of Power Supply. Power Supply Replaced (← links)
- 05000361/LER-1994-006, :on 941023,violation of TS 6.2 Shift Manning Occurred.Caused by Misunderstanding of Control Room Area Boundaries.Administrative Procedure SO123-0-30 Revised.W/ (← links)
- 05000361/LER-1983-111-03, /03L-0:on 830803,29 Penetration Seals in Various Fire Zones Found Inoperable During 18-month Surveillance of Fire Rated Barriers.Inoperable Seals Apparently Damaged During Const Activities (← links)
- 05000361/LER-1983-105-03, /03L-0:on 830801,toxic Gas Isolation Sys Butane/ Propane Monitor Train a & B Pilot Flames Extinguised.Cause Under Investigation.Regulator Replaced (← links)
- 05000361/LER-1983-102-03, /03L-0:on 830801,while in Mode 2,control Element Assembly 62 Slipped 10 Inches.Caused by Malfunction in Upper Gripper on Assembly.Control Element Assembly Coil Stacks to Be Replaced W/Stronger Coils.Unit Realigned (← links)
- 05000361/LER-1983-089-03, /03L-0:on 830730,train B Salt Water Cooling Sys Flow Rate Less than Required.Unit Declared Inoperable While Debris Cleaned from Traveling Screen Sys (Tss).Caused by TSS Overload Due to High Surf (← links)
- 05000361/LER-1983-090-03, /03L-0:on 830802,control Element Assembly 46 Became Misaligned by More than 19 Inches.Caused by Intermittent Loss of Power to Control Element Drive Mechanism Control Sys Power Switch (← links)
- 05000361/LER-1983-103-03, /03L-0:on 830730,w/unit Operating at 92%,rapid Reduction in Power Commenced to Clean Debris from Traveling Screen Sys.W/Power at 52% During Xenon Transient,Tc Observed Outside Limits of Limiting Conditions (← links)
- 05000361/LER-1983-083-03, /03L-0:on 830802,steam Generator Wide Range Level Indicator 2LI-1125-2 Dicovered Reading Incorrectly.Caused by Gas Entrapped in Instrument Sensing Line When Calibr on 830626.Instrument Line Vented (← links)
- 05000361/LER-1991-009-01, :on 910702,control Room Isolation Sys Train B Spurious Actuation Occurred When Technician Hit Radiation Monitor Module Power On/Off Pushbutton.Caused by Personnel Error.Event Discussed W/Technician (← links)
- 05000361/LER-1983-069-03, /03L-0:on 830610,while in Mode 1,control Element Assembly Calculator 1 Declared Inoperable Due to Erratic Position Indication.Caused by Faulty Isolation Amplifier Card.Card Replaced (← links)
- 05000361/LER-1983-040-01, /01T-0:on 830628,C-E Advised Util of Deficient RCS Hot Leg Sampling Nozzle Loads.Caused by Design Error. Shims Installed to Reduce Nozzle Loads to Acceptable Limits (← links)
- 05000361/LER-1983-068-01, /01T-0:on 830628,C-E Advised Util of Deficient RCS Hot Leg Sampling Nozzle Loads.Caused by Design Error. Shims Installed to Reduce Nozzle Loads to Acceptable Limits (← links)
- 05000361/LER-1983-070-03, /03L-0:on 830613,while in Mode 1,two Steam Leaks Observed in Line to turbine-driven Auxiliary Feedwater Pump 2P-140.Caused by Leaking Plug on Turbine Stop Valve & Valve Seating Surfaces.Plug Replaced (← links)
- 05000361/LER-1983-065-03, /03L-0:on 830609,control Element Assembly (CEA) 57 Slipped More than 19 Inches During Group Adjustment.Caused by Malfunctioning Upper Gripper on Assembly.Cea Coil Stacks Will Be Replaced W/Sys 80 Coils (← links)
- 05000361/LER-1994-005, :on 941012,voluntary TS 3.0.3 Entry Due to Declaring Both Trains of ECCS Inoperable in Mode 1.Util Replaced 2PCV6418 W/Qualified in-kind Replacement Valve (← links)
- 05000361/LER-1983-064-03, /03L-0:on 830602,w/core Operating Limit Supervisory Sys Out of Svc,Surveillance Test 5023-3-3.6 Failed to Verify That DNBR Was within Acceptable Limits. Caused by Conservative Thermal Power Uncertainty Bias (← links)
- 05000361/LER-1983-039-01, /01T-0:on 830621,motor-driven Auxiliary Feedwater Pump 3P-504 Declared Inoperable Following Failure to Complete 48 H Endurance Run.Caused by Failed Outboard Bearing.Bearings Replaced (← links)
- 05000361/LER-1983-063-01, /01T-0:on 830621,motor-driven Auxiliary Feedwater Pump 2P-504 Declared Inoperable Due to Improperly Machined Oil Grooves.Properly Machined Bearings Installed (← links)
- 05000361/LER-1983-048-03, Pilot Flames of Trains a & B Toxic Gas Isolation Sys Butane/Propane Monitors Experienced Persistent flame-out After Replacement of Hydrogen Cylinder (← links)
- 05000361/LER-1983-047-03, Toxic Gas Isolation Sys Train a Declared Inoperable.Caused by Two Simultaneous Failures:Discharged Battery Supply & Misaligned Alarm Setpoint.Battery Replaced (← links)
- 05000361/LER-1983-057-03, /03L-0:on 830522,fire Computer Alarms Received for Fire Zones 22,29,30,31,32A,32B & 53.Investigation Disclosed Fire Panel 2/3 L203 Inoperable.Caused by Incorrectly Rewired Smoke Detector.Detector Rewired (← links)
- 05000361/LER-1983-077-03, /03L-0:on 830714,core Protection Calculator Channel D Declared Inoperable Following Several Spurious Trips.Caused by Erroneous Data Due to Failed Data Card.Card Replaced (← links)
- 05000361/LER-1983-082-03, /03L-0:on 830718,supervisory Trouble Alarm Sounded Involving Fire Detection Panel 2/3L-236.Caused by Inadvertent Circuit Interruption by Contract Electrician. Circuit Repaired (← links)
- 05000361/LER-1983-041-07, /07L-0:on 830429,documentation Could Not Be Located Indicating Operability Testing,Including Testing Required by Inservice Insp & Testing Program.Caused by Inadequate Administrative Controls (← links)
- 05000361/LER-1991-020-01, :on 911226,noted That Weekly Surveillance on Class 1E 125 Volt Dc Batteries Not Performed Due to Personnel Error.Event Will Be Reviewed W/Appropriate Personnel to Ensure Understanding of TS 4.0.3 (← links)
- 05000361/LER-1983-049-03, /03L-0:on 830429,emergency Chiller E-336 (Train a) Failed to Start Following Invalid Tgis.Caused by Misalignment of Supply Breaker.Breaker Aligned (← links)
- 05000361/LER-1983-045-03, /03L-0:on 830504,while Working on Plant Protection Sys Channel A,Reactor Trip Circuit Breaker TCB-1 Tripped Open,Rendering Channel Inoperable.Caused by Loose Cable Terminal Block Screws.Screws Tightened (← links)
- 05000361/LER-1983-010-01, Creacus Train a Failed to Maintain Required Positive Pressure in Control Room During Testing & Declared Inoperable.Caused by Air Leakage Through Control Room Boundary.New Door Seals Installed (← links)
- 05000361/LER-1983-087-03, /03L-0:on 830715,control Element Assembly 20 Analog Position Indication Appeared Faulty.Cause Not Determined.Reed Switch Assembly Replaced,Investigation Being Continued & Corrective Action to Be Determined (← links)
- 05000361/LER-1983-080-03, /03L-0:on 830712,reactor Coolant Boronmeter Taken Out of Svc to Repair Leaks & for Routine Calibr.Caused by Worn Gaskets Between Connection Flange & Flange Between Flow Indicator & Adjacent Check Valve MU-098 (← links)
- 05000361/LER-1983-078-03, /03L-0:on 830713,condensate Storage Tank 2T-121 Water Level Fell Below Tech Spec Limit Twice When Water Usage by Auxiliary Feedwater Sys Exceeded Makeup.Caused by Water Demand (← links)
- 05000361/LER-1983-091-03, /03L-0:on 830713,during QC Insp of Fire Barrier Penetrations in Cable Riser Room 236,penetration Seal in Zone 29 Discovered Inoperable.Caused by Const Error.Fire Watches in Effect Until Seals Repaired (← links)
- 05000361/LER-1983-037-01, /01T-0:on 830421,high Steam Generator Differential Pressure Setpoint Used in PPS Emergency Feedwater Sys Logic Circuitry Resulted in Actual Trip Setpoint 300 Psid Higher than Assumed in Fsar.Caused by Voltage Conversion Erro (← links)
- 05000361/LER-1983-035-03, /03L-0:on 830405,pin Hole Leaks Discovered in Mini Flow Line for Auxiliary Feedwater Pump P141,downstream from Flow Orifice FO-4711.P141 Delcared Inoperable.Caused by Cavitation Downstream of Flow Orifice.Pipe Section Replac (← links)
- 05000361/LER-1983-036-01, /01T-0:on 830321,discharge Isolation Valve on Common Liquid Radwaste Effluent Radiation Monitor 2/3 RT-7813 Discovered Shut.Caused by Personnel Error.Valve Left Shut During Quarterly Channel Functional Test (← links)
- 05000361/LER-1983-026-01, /01T-0:on 830404,containment Isolation Valve 2HV8248 Indicated mid-position Following Both Open & Closed Signals.Caused by Faulty Magnetic Reed Switch Assembly. Assembly Replaced.Valve Declared Operable (← links)
- 05000361/LER-1983-033-03, /03L-0:on 830315,pilot Flames of Train a & B Toxic Gas Isolation Sys Butane Monitors Extinguished.Caused by Low Pressure in Single Hydrogen Supply Bottle.Bottle Replaced (← links)
- 05000361/LER-1983-034-03, /03L-0:on 830319,during Mode 5 Operation,Control Power to P160 (Emergency Chilled Water Pump Train B) Lost. Caused by Operator Charging Control Switch Lamp Which Resulted in Short Circuit & Blown Fuse.Fuse Replaced (← links)
- 05000361/LER-1991-019, :on 911116,determined That Containment Pressure Instrument Line Isolation Valve 2HV0352C Had Been Closed During Refueling Outage.Caused by Misconfigured Wiring to Valve.Valve Was Reworked & Restored (← links)
- 05000361/LER-1994-004, :on 940619,HPSI Pump P017 Was Removed from Service & Declared Inoperable.Caused by Incomplete & Inadequate Evaluation of Work Planned for P017 & ME417.All Equipment Personnel Have Received Training (← links)
- 05000361/LER-1983-022-01, /01T-0:on 830321,gate Valves 2HV6227 & 2HV6229 Installed in Component Cooling Water Sys Identified by Westinghouse as Potentially Defective.Caused by Design Defect.Valves Will Be Visually & Manually Checked (← links)
- 05000361/LER-1983-029-01, /01T-0:on 830325,gate Valves 2HV6227 & 2HV6229 Installed in Component Cooling Water Sys Identified by Westinghouse as Potentially Defective.Caused by Design Defect.Valves Will Be Visually & Manually Checked (← links)
- 05000361/LER-1983-025-03, /03L-0:telephone Rept Made Re Failure of Reactor Trip Circuit Breakers to Trip on Undervoltage.Caused by Inadequacies in Certain Maint Activities.Return to Power Rept Scheduled for Submittal by Apr 1983 (← links)
- 05000361/LER-1983-031-01, /01T-0:on 830323,potential Safety Concern Identified,Involving Calibr Shift of 2AO-V31 Modules Associated W/Core Protection Calculators.Caused by Problems W/Amplifier.Design Change Initiated to Replace Modules (← links)
- 05000361/LER-1983-028-01, /01T-0:on 830323,potential Safety Concern Identified,Involving Calibr Shift of Foxboro 2AO-V31 Modules Associated W/Core Protection Calculators.Caused by Problems W/Amplifier.Design Change Approved to Replace Modules (← links)
- 05000361/LER-1983-024-03, /03L-0:on 830302,emergency Chiller Room Supply & Exhaust Fans A053 & 56 Associated W/Emergency Chiller E-336 Failed to Start.Caused by Inadvertent Valving Out of Chilled Water Flow Control Switch FCL-9870-1 (← links)
- 05000206/LER-1982-007-03, /03L-0:on 820208,south Saltwater Cooling Pump (G13B) Declared Inoperable.Caused by Random Failure of Discharge Pressure switch,PS-39.Pressure Switch Replaced (← links)
- 05000206/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted (← links)
- 05000206/LER-1982-003, Forwards LER 82-003/99X-0.Detailed Event Analysis Submitted (← links)
- 05000206/LER-1982-004-01, /01T-0:on 820129,chlorine Residual in Circulating Water Sys Exceeded Tech Spec Limits During Normal Operation. Caused by Air Operated Valve Controlling Flow to Circulating Water Sys Failing Closed,While Injection Pump Contin (← links)
- 05000206/LER-1982-004, Forwards LER 82-004/01T-0.Detailed Event Analysis Submitted (← links)
- 05000206/LER-1982-001-01, /01T-0:on 811210,Sigma Instruments Inc Informed of Potential Deficiency in Lumigraph Indicators Model 9270. Caused by Incorrectly Specified Resistors Incorporated Into Indicator Circuits.Replacement Planned for Mar 1982 Outa (← links)
- 05000206/LER-1982-001, Forwards LER 82-001/01T-0.Detailed Event Analysis Encl (← links)
- 05000206/LER-1982-025-01, /01X-1:on 821012,13 & 20,three Lapses in Fire Watch Coverage Occurred.Caused by Inadequate Supervision. Two Supervisory Positions Added to Fire Watch Program.Memos Issued to Clarify Authority for Release of Fire Watches (← links)
- 05000206/LER-1982-025, Forwards LER 82-025/01X-1.Detailed Event Analysis Encl (← links)
- 05000361/LER-1982-165-03, /03L-0:on 821209,while in Mode 1,discovered Two Snubbers,Components of Pipe Support S2-FW-189-HO13,damaged & Inoperable.Cause Undeterminable.Engineering Analysis Performed Satisfactorily.Snubbers Replaced (← links)
- 05000362/LER-1982-007, Forwards LER 82-007/03L-0.Detailed Event Analysis Submitted (← links)
- 05000362/LER-1982-005-03, /03L-0:on 821205,during Mode 5,diesel Generator 3GOO3 Taken Out of Svc Leaving Boration Flow Paths W/O Emergency Power Sources.Caused by Personnel Error Due to Failure to Recognize Consequences.Personnel Counseled (← links)
- 05000361/LER-1982-161-03, /03L-0:on 821206,condensation Storage Tank T-120 Water Level Fell Below Tech Spec.Caused by Inadequate Makeup Water Control.Operators Reinstructed.Engineering Evaluation Underway (← links)
- 05000206/LER-1982-010-99, /99X-0:on 820317,three Tubes on Inlet Side of Steam Generator C Found Leaking.Caused by Intergranular Attack at Top of Tubesheet on Tube Portion of tube-sleeve Assembly.Leaking Tubes Removed from Svc by Plugging (← links)
- 05000206/LER-1982-010, Forwards LER 82-010/99X-0.Detailed Event Analysis Submitted (← links)
- 05000362/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-155-03, /03L-0:on 821206,two Fire Spray Sys in Cable Spreading Room Declared Inoperable in Order to Repair Leaking Valve.Caused by Minor Leakage Due to Damaged Seating Surfaces of Manual Shutoff Valve SA2301MU121.Valve Replaced (← links)
- 05000361/LER-1982-155, Forwards LER 82-155/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-163-03, /03L-0:on 821208,during Mode 1, Auxiliary Feedwater Pump 2P-140 Tripped on Overspeed.Caused by Failure of Resistor in Pump Speed Sensor Circuitry. Resistor Replaced (← links)
- 05000361/LER-1982-163, Forwards LER 82-163/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-162, Forwards LER 82-162/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-004-03, /03L-0:on 821124,samples from Control Room Emergency Air Cleanup Sys Train a Charcoal Absorber Failed to Satisfy Methyl Iodine Removal Capability.Caused by Activated Charcoal Degradation.Charcoal Replaced (← links)
- 05000361/LER-1982-157-03, /03L-0:on 821124,samples from Control Room Emergency Air Cleanup Sys Train a Charcoal Absorber Failed to Satisfy Methyl Iodine Removal Capability.Caused by Activated Charcoal Degradation.Charcoal Replaced (← links)
- 05000361/LER-1982-131, Forwards LER 82-131/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-114-01, /01T-0:on 821017,during Surveillance Testing in Mode 4,containment Cooling Fan 2E-402 Failed to Start. Caused by Faulty Fan Breaker.Breaker Replaced (← links)
- 05000206/LER-1982-023-03, /03L-0:on 820919,fire Water Crosstie Damaged During New Const Activities.Caused by Incorrect Const Digging Process.West Fire Water Pump Returned to Svc.Backup Fire Suppression Hoses Rigged (← links)
- 05000206/LER-1982-023, Forwards LER 82-023/03L-0.Detailed Event Analysis Submitted (← links)
- 05000361/LER-1982-105-03, /03L-0:on 820831,during Mode 2 Operation,Auxiliary Feedwater Pump 2P-504 Declared Inoperable.Caused by Leaky Threaded Plug on Pump Discharge Casing.Threads Cleaned, Graffoil Applied & Plug Reinstalled (← links)
- 05000206/LER-1982-006, Forwards LER 82-006/99X-0.Detailed Event Analysis Submitted (← links)