Pages that link to "Overcurrent"
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The following pages link to Overcurrent:
Displayed 50 items.
- 05000364/LER-1998-001-01, :on 980328,manual Reactor Trip Was Noted.Caused by Dropped Control Rod K-2 & F-10.Affected Cable & Connectors Were Replaced During Unit 2 Twelfth Refueling Outage & Tested During Startup (← links)
- 05000293/LER-1989-026, :on 890830,automatic Scram Signal & Reactor Scram Resulted in turbine-generator Trip & Opening of 345 Kv Switchyard Air Circuit Breakers.Caused by Automatic Turbine Runback.Wiring to Relays Reversed (← links)
- 05000361/LER-1998-006, :on 980421,missed TS Surveillance Due to Initial Procedural Error.Caused by Personnel Error.Revised Affected Procedures (← links)
- 05000327/LER-1987-030, :on 890620 & 0704,four Standby Diesel Generators Started Due to Blown Fuse in Remote Emergency Start Circuitry & 125 Volt Dc Vital Battery Board Ii.Caused by Defective Fuse.Fuses Replaced (← links)
- ML20244C846 (← links)
- 05000482/LER-1988-021, :on 881025,containment Cooling Fan Inoperability Occurred Due to Motor Overcurrent Condition. Cause Under Evaluation.Motor Replaced W/Qualified Motor (← links)
- 05000412/LER-1989-014, :on 890506,supply Breaker to 480-volt Essential Bus J Opened,Deenergizing Bus & All Components Powered Off Bus & Actuating Leak Collection Ventilation Flowpath.Caused by Supply Breaker Trip.Breaker Reset (← links)
- 05000382/LER-1987-022, :on 870814,automatic Start of Train B Control Room & Fuel Handling Bldg Emergency Filtration Units Occurred.Caused by Mechanical Binding of Relay Operating Mechanism.Evaluation of Reliability Underway (← links)
- 05000423/LER-1998-012, :on 980218,potential Failure of Rhrps Due to Loss of Mim Flow Protection,Was Reported.Caused by Lack of Documented Review & Analysis of Historical Design Deficiency.Performed DCR M3-98013 (← links)
- 05000382/LER-1987-026, :on 871123,chemical & Vol Control Valves Failed to Meet Containment Penetration Backup Overcurrent Protection Operability Requirement.Caused by Personnel Error.Cables Properly Connected (← links)
- 05000366/LER-1987-009-01, :on 870803,reactor Scram Occurred Due to Loss of Vital Ac Power.Caused by Weak Tripping Mechanism in Circuit Breaker CB-4.Jumpers Installed,Equipment Removed from Svc & Instrumentation Verified (← links)
- 05000321/LER-1987-011-01, :on 870723,vital AC (EIIS Code Ee) Power Lost Resulting in Reactor Scram.Caused by Equipment Failure. Inverter Refurbished,Temporary Cooling to Inverter Rooms Added & Failed Parts Replaced (← links)
- ML20237H405 (← links)
- ML20237H401 (← links)
- 05000425/LER-1998-005, :on 980609,reactor Trip & Safety Injection Following Condensate Pump Trip,Occurred.Caused by Electrical Fault in Surge Capacitor of 2C Condensate Pump Motor. Condensate Pump Motor 2C Repaired (← links)
- 05000327/LER-1986-015, :on 860407 & 09,failure to Properly Functional Test Reactor Coolant Pump Devices & Electrical Breakers Noted.Caused by Inadequate Test Procedure.Procedure Revised to Ensure Use of Proper Test Techniques (← links)
- 05000293/LER-1998-014, :on 980622,identified Potential Degraded Grid Voltage Condition.Caused by Misunderstanding of Regulatory Guidelines.Engineering Evaluation Ee 98-0055 Prepared to Address Discrepancy in Timing of Restoring Emergency Power (← links)
- 05000293/LER-1998-015, :on 980622,identified Potential Low Voltage Condition,Coincident w/loss-of-coolant Accident.Caused by Deficiency in Original Design of Degraded Voltage Protection Sys.Design Basis Reviewed (← links)
- 05000289/LER-1987-001-01, :on 870109,emergency Diesel Generator B Auto Started Due to Electrician Opening One Phase of 1E Bus 4,160-volt Current Transformer.Caused by Inadequate Instruction.Bus re-energized (← links)
- 05000327/LER-1987-001, :on 870106,trip Setpoint for Acbs on Shutdown Boards That Feed Control & Auxiliary Bldg Vent Boards Discovered Incorrect.Caused by Design Error.Breaker Trip Settings Will Be Corrected (← links)
- 05000374/LER-1987-005-07, :on 870402,diesel Generator 2B Shutdown W/ Control Switch in Auto.Caused by Personnel Errors.Testing Suspended & All Jumpers & Lifted Leads Required by Surveillance Immediately Removed (← links)
- 05000382/LER-1999-006-01, :on 990614,plant Experienced Automatic Reactor Trip Following Loss of 7kV Bus.Caused by Spurious Actuation of Relay on Either RCP 1A or 2A.Personnel Performed Final Switchgear Walkdown with Indications Normal.With (← links)
- 05000412/LER-1999-005-01, :on 990329,4KV-2A Bus Trip on Ground Overcurrent Relay 51-VA207X,occurred.Caused by Erratic DC Supply Voltage Caused by Loose connection.4 Kv Bus 2A Meggered with 5,000 Volts Dc,Satisfactorily (← links)
- 05000219/LER-1984-021, :on 840825,bolted Fault Occurred When Control Switch Closed Causing Trip of Pump & Flash Which Caused Sufficient Ground Current Flow to Trip Main 4160-volt Bus Breaker 1C.Caused by Personnel Error (← links)
- 05000278/LER-1986-016-02, :on 860719,Group II & III Isolations Occurred Due to High Neutron Flux Scram When Startup Source 3 Lost. Caused by Switchyard Fault & Abnormal Configuration of Fault Detection Circuit (← links)
- 05000266/LER-1998-002, :on 980108,failure of High Voltage Station Auxiliary Transformer Occurred Due to Ground in Low Voltage Side Bus Duct.Operability of 1X03 Was Restored & Verified to Be in Operation by Infrared Scan (← links)
- 05000266/LER-1997-041, :on 971023,potential Common Mode Failure in Afws Control Circuits Was Noted.Caused by AFW Control Circuits Installed by Plant Mods.Temporary Mods Will Restore Physical Separation for Cables (← links)
- 05000423/LER-1997-051, :on 971007,noted Design Deficiency for 4.16kV Feeder Fault Clearing Times.Caused by Inadequate Design Control Process During Implementation.Will Restore Electrical Protection Relaying Scheme for Individual 4.16kV (← links)
- 05000382/LER-1995-002, :on 950610,reactor Trip,Partial Loss of Offsite Power & non-safety Related Switchgear Fire Occurred.Caused by Improper Automatic Bus Transfer.New Automatic Bus Transfer Scheme Installed (← links)
- 05000302/LER-1997-043, :on 971208,deficiency in Electrical Design Criteria Resulted in Control Complex Chiller Motor Trip Set Point Set Below Full Load Ampere Setting,Was Discovered. Caused by Lack of Effective Cap.Established Improved CAP (← links)
- 05000302/LER-1997-044, :on 971209,breaker Trip Setpoint Resulted in Deenergizing of Sre.Caused by Inadequate Setpoint Criteria. Revised Electrical Design Criteria for CR-3 (← links)
- 05000373/LER-1997-043, :on 971125,incomplete TS Surveillance on Div III Edgs,Was Determined.Caused by Inadequate Procedure Review.Dgs Declared Inoperable Until Methodology Developed to Adequately Satisfy Surveillance Requirements of TS (← links)
- 05000289/LER-1997-007, :on 970621,generator Output Breaker Failed Resulting in Loss of Offsite Power & Rt.Caused by Failure of Generator Breaker GB-102.Both Failed Breakers Were Replaced (← links)
- 05000412/LER-1988-002, :on 880127,reactor Tripped & Control Room Emergency Bottled Air Pressurization Sys Actuation Occurred. Caused by Reactor Coolant Pump 21A Trip on Undervoltage Due to Loss of Bus 2A.Transmitter Calibr (← links)
- ML20155B483 (← links)
- ML20155B456 (← links)
- 05000458/LER-1988-018, :on 880825,reactor Automatically Scrammed Due to Turbine Control Valve Fast Closure Caused by Loss of Main Generator Field Excitation Resulting in Automatic Main Generator & Turbine Trips (← links)
- ML20154J000 (← links)
- 05000461/LER-1998-029, :on 860929,discovered That Conductors in Two Containment Electrical Penetrations Did Not Have Adequate Overcurrent Protection.Caused by Original Design Error for Plant.Will Design & Install Required Protective Devices (← links)
- 05000266/LER-1997-032, :on 970630,discovered Inadequately Rated Electrical Buses Could Disable Switchgear & Cause Secondary Fires.Caused by Characteristic of Original Design. Established twice-per-shift Fire Watches (← links)
- 05000423/LER-1997-038, :on 970613,identified Single Failure Potential for Fuel Bldg Filter Exhaust Fans.Caused by Failure to Recognize Design Deficiency.Will Prepare & Implement Design Change of Fuel Bldg Filter Exhaust Ventilation Sys Damper (← links)
- ML20147F565 (← links)
- 05000461/LER-1997-006, :on 970219,lack of Coordination of 120 Volt non-safe Shutdown Circuit Breakers in Distribution Panels W/Shutdown Circuit Breakers Causes Plant to Be Outside Its Basis.Corrected Circuit Breaker Problems (← links)
- ML20141K133 (← links)
- 05000374/LER-1986-004-04, :on 860216,reactor Scram Occurred,Resulting from Turbine Control Valve Fast Closure Following Offsite phase-to-phase Fault on Transmission Line 0101.Probably Caused by Missing Shorting Link (← links)
- ML20138G990 (← links)
- 05000219/LER-1984-020-01, :on 840910,power Lost to busses,1A2 & 1B2, Resulting in Full Scram,Reactor Primary & Secondary Containment Isolation & Loss of Standby Gas Treatment Sys Trains.Caused by Faulty Overcurrent Device (← links)
- 05000354/LER-1995-033, :on 951114,TS Surveillance Requirements 4.8.3.1 & 4.8.3.2 Not Completed Fullfilled Due to Surveillance Test Inadequacies.Surveillance Procedures Revised & Surveillances Successfully Performed (← links)
- 05000369/LER-1996-003, :on 960618,during Scheduled Operability Test of EDG 1A,EDG Declared Inoperable.Caused by Equipment Failure/ Malfuction of EDG 1A & Equipment Failure & Mfg Process Deficiency of EDG 1B.EDGs SD & Failed Components Replaced (← links)
- NUREG-1366, Amends 170 & 152 to Licenses NPF-9 & NPF-17,respectively, Incorporating Guidance & Recommendations for Diesel Generators Contained in NUREG-1366,GL 93-05,Gl 94-01 & NUREG-1431 (← links)