Pages that link to "05000454/LER-1990-001"
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The following pages link to 05000454/LER-1990-001:
Displaying 50 items.
- 05000454/LER-2001-002 (← links)
- 05000454/LER-2001-001 (← links)
- 05000454/LER-1995-001, Informs That SER Issued Using LER 95-001 & Will Not Be Deemed as Ler.Lers 95-007 & 95-009 Will Not Be Used for Docket 50-454.LERs 95-003 Will Not Be Used for Docket 50-455 (← links)
- 05000454/LER-1994-005, Informs That for Docket 50-454,LER 94-005 from Byron Generating Station Will Not Be Used (← links)
- 05000454/LER-1998-018, Corrected LER 98-018-00:on 980912,inoperable Unit 1 DG Was Noted.Caused by Low Lube Oil Pressure Condition.Immediately Entered Into Lcoar for AC Sources TS 3.8.1.1,Action a (← links)
- 05000454/LER-1999-002, Forwards LER 99-002-00,IAW 10CFR50.73(a)(2)(i)(b).There Are Two Actions Remaining to Address Cause of Event.Both Actions Are Listed (← links)
- 05000454/LER-1998-020, Forwards LER 98-020-00 IAW 10CFR50.73(a)(2)(v).Actions to Address Cause of Event Listed (← links)
- 05000454/LER-1999-001, Forwards LER 99-001-00,IAW 10CFR50.73(a)(2)(i)(B).Required Actions to Address Causes of Event Listed (← links)
- 05000454/LER-1998-005, Forwards Revised LER 98-005-00 Which Corrects Errors Involving Incorrect LER Number on Pages 2 Through 5.No New Commitments Made within Submittal (← links)
- 05000454/LER-1998-008, Informs That Licensee Determined That Suppl Rept to LER 98-008 Is Not Warranted.No Addl Info Was Generated Following Completion of Root Cause Investigation of Following Completion of Corrective Actions Stated in Original LER (← links)
- 05000454/LER-1997-011, Provides Addl Info Recently self-identified by Station Personnel Re Corrective Actions Identified in Original LER 97-011.Info Contained in Licensee Re SI Lube Oil Cooler Remain Valid & Basis for Cancelling LER Is Unchanged (← links)
- 05000454/LER-2024-001, Both Trains of Control Room Ventilation Temperature Control System Inoperable (← links)
- 05000454/LER-2023-001-01, A Control Room Ventilation Inoperable Due to Jumpers Left on 0PR031J and 0PR32J (← links)
- 05000454/LER-2023-001, A Control Room Ventilation Inoperable Due to Jumpers Left on 0PR031J and 0PR032J (← links)
- 05000454/LER-2022-001, Ob Control Room Ventilation Supply Fan Failed to Start Due to Erroneous Position Indication from the Closed Limit Switch for Charcoal Deluge Valve Interlock (← links)
- 05000454/LER-2021-001-01, Pressurizer Safety Valves As-Found Lift Pressure Outside of Tech Spec Limit (← links)
- 05000454/LER-2021-001, Re Pressurizer Safety Valves As-Found Lift Pressure Outside of Tech Spec Limit (← links)
- 05000454/LER-2024-002, Reactor Vessel Closure Head Penetration 31 Degraded (← links)
- 05000454/LER-1989-008-08, :on 890830,determined That Auxiliary Feedwater Pump Suction Pressure Switch Setpoints Not within Allowable Values.Root Cause Under Evaluation.Switch Setpoints Set to Conservatively High Values (← links)
- 05000454/LER-1989-005-07, :on 890501,diesel Generator Failed to Load to 5,500 Kw within 60 Due to Deficient post-maint Testing. Caused by Max Fuel Setting on Fuel Control Sys Set Too Low. Fuel Control Sys Properly Adjusted (← links)
- 05000454/LER-1998-011-01, :on 980409,integral Attachment Welds Were Not Inspected IAW ASME Code Due to Deficient ISI Program Plan. Cause of Event Unknown.Byron Site Engineering & Operation Dept Evaluated Operability Issues (← links)
- 05000454/LER-1988-005-01, :on 880804,two Stability Trip Enable Annunciators Actuated Simultaneously in Main Control Room & Output Breakers Opened.Caused by Microwave Noise on Circuit Communicating Grid Status.Power Restricted (← links)
- 05000454/LER-1989-007-07, :on 890803,lightning Caused Transmission Line 0622 to Trip & Initiated Voltage Transient on Electrical Sys.Transmission Line Repaired & Mod Installed in Radiation Monitors (← links)
- 05000454/LER-1989-004-06, :on 890328,diesel Generator 1A Failed to Start During Monthly Operability Surveillance.Caused by Excess Binding Fuel Supply Controls.Injection Pump Metering Rod Cylinders Cleaned & Free Motion Verified (← links)
- 05000454/LER-1989-006-07, :on 890520,area Radiation Monitor ORT-AR056 & Process Radiation Monitors OPR33J & OPR34J Sensed Voltage Transient Condition & Transferred to Interlock Mode.Caused by Three Phase to Ground Fault.Grounds Removed (← links)
- 05000454/LER-1998-017-01, :on 980804,line 0621 Trip & Subsequently,Loss of Unit 1 SATs Causing Loss of Offsite Power,Occurred.Caused by Failure of 94X Relay to Reset After Fault Cleared. Investigate Failure of 94X Relay to Reset (← links)
- 05000454/LER-1997-017-02, :on 971009,degraded Condition of SIS Was Found During Monthly Venting Surveillance.Caused by Failure of 1SI8819C Clcv from 1C SI Accumlator.Si Low Head Piping Was Ultrasonically Examined & Found Water Solid (← links)
- 05000454/LER-1987-018-03, :on 870811,reactor Trip Occurred.Caused by Trip of Main Feedwater Pump Due to Broken Wire on Proximity Probe.Feedwater Supervisory Instrumentation Repaired & Calibr & Automatic Trips on Pumps Disabled (← links)
- 05000454/LER-1987-019-03, :on 870812,safety Injection & Reactor Trip from Low Steam Line Pressure Occurred Due to Failed Main Turbine Throttle.Caused by Failed Moog Servo Valve.Valve Replaced & Procedures Revised (← links)
- 05000454/LER-1987-017-03, :on 870729 & 31,de-energization of Power Supplies in Rod Drive Sys Caused Reactor Trips.Caused by Lightning Strikes.Power Supply Overvoltage Protection Circuits Reset & Verified Operable (← links)
- 05000454/LER-1996-014, :on 960903,failure to Comply W/Design Basis Re Sf Storage Racks Was Noted.Caused by Deterioration as Result of Improper Matl Selection.Controlled SFP Boron Concentration & Silica Concentration (← links)
- 05000454/LER-1998-005-06, :on 980307,manual Reactor Trip Due to Indeterminate Rod Sequencing Problem Occurred.Caused by Failure of Bank Overlap Thumbwheel Switch.Halted Rod Insertion & Manually Initiated Reactor Trip (← links)
- 05000454/LER-1998-016-01, :on 980616,main CR Pressure non-compliance Was Noted.Caused by Inadequate Procedural Directions.Rewrote Procedure Bap 1100-03 & Associated Matrices & Field Use Data Sheets to Ensure Technical Correctness (← links)
- 05000454/LER-1998-015-01, :on 980618,non-licensed Operator Started B Train MCR Ofc Supply Fan That Was Shutdown Due to Lcoar Action Requirements.Caused by Poor Practices.Shutdown MCR Ofc Fans & Taken out-of-svc Immediately (← links)
- 05000454/LER-1987-022-03, :on 871026,area Radiation Monitor Spiked Above Alert Alarm Setpoint,Resulting in Containment Ventilation Isolation Alarm.Caused by Faulty Detector.Detector Replaced & Monitor Returned to Svc on 871029 (← links)
- 05000454/LER-1987-011-01, :on 870415,carbon Dioxide Sys to Auxiliary Feedwater Pump Room Declared Inoperable.Caused by Vapor Pilot Valve Mispositioned,Closed & Not Included on Design Documents.Valve Opened & Placed on Drawings (← links)
- 05000454/LER-1989-002-06, :on 890131,reactor Manually Tripped When Positioner Arm on Feedwater Regulating Valve Disengaged. Caused by Intermittent Oscillations in Valve.Positioner Reconnected Using Locktite & Star Washer (← links)
- 05000454/LER-1987-021-03, :on 870917,control Room Ventilation Actuation Occurred Due to Distribution Sys Voltage Transient When Offsite Line Tripped.Mods Installed in 1985 to Reduce Undervoltage Trip Setpoints on All Process (← links)
- 05000454/LER-1987-020-03, :on 870902,contractor Assigned Continuous Fire Watch Left Assigned Watch Area to Rept for Whole Body Count Processing.Caused by Cognitive Personnel Error.Personnel Given Sheet Listing Responsibilities (← links)
- 05000454/LER-1987-016-05, :on 870831,inadvertent Train a Safety Injection Occurred During Surveillance Test.Caused by Personnel Error. Disciplinary Action Given to Involved Nuclear Station Operators (← links)
- 05000454/LER-1998-007-01, :on 980306,process Sampling Valve 1PS9354A Was Found W/Packing Leak.Caused by Personnel Error That Did Not Verify Adequate Testing.Declared Subject Valve Inoperable, Entered LCO & Will Revise Procedures (← links)
- 05000454/LER-1998-005-01, :on 980307,manual RT Due to Indeterminate Rod Sequencing Problem Was Noted.Cause Is Undetermined.Halted Rod Insertion,Manually Initiating RT & Exercising Bank Overlap Thumbwheel Switch to Clean Contacts (← links)
- 05000454/LER-1998-008-01, :on 980305,manual RT Due to Loss of Communication During Rod Drop Testing Was Noted.Caused by Procedure Deficiency.Revised Tp to Require Appropriate Use of Voice Amplifiers (← links)
- 05000454/LER-1997-023, :on 971229,1B DG Control Power Wiring Discrepancy Occurred Due to Mod Installation Error & Programmatic Deficiencies.Caused by Failure to Use self-check Principles.Counseled Technician (← links)
- 05000454/LER-1998-004-01, :on 980228,determined That Plugged Drain in Reactor Incore Instrumentation Seal Table Room Had Not Been Properly Evaluated.Caused by Inadequate Written & Oral Communications.Temporary Alteration Installed (← links)
- 05000454/LER-1998-010-01, :on 980318,failure to Perform in Service Testing After Maintenance Was Noted.Caused by Poor Communication.Problem Identification Form B1998-01335 Was Initiated on 980320,to Investigate Event (← links)
- 05000454/LER-1998-009-01, :on 980318,TS Test Was Missed Due to Failure to Follow Procedure.Caused by Personnel Error.Operations Department Head Will Discuss Rept W/All Mgt & Operators (← links)
- 05000454/LER-1987-015-03, :on 870526,automatic Start of Auxiliary Feedwater Pump Occurred.Caused by Personnel Error. Disciplinary Action Taken & Operator Involved Counseled.W/ (← links)
- 05000454/LER-1997-015-03, :on 970813,containment Penetration Test,Vent & Drain Valves Were Not Surveilled within 31 Days.Caused by Difference in Interpretation of Regulations.Surveillance Applied to All Valves (← links)
- 05000454/LER-1987-016-03, :on 870526,during Mode 3,both Trains of Containment Spray Additive Sys Discovered Inoperable.Caused by Two Locked Open Isolation Valves Mispositioned Due to Procedural Deficiency.Valve Repositioned (← links)