Pages that link to "PNO-V-86-039, on 860708,earthquake w/6.0 Reading on Richter Scale Actuated Seismic Alarms & Recording Instruments. Procedures for Visual Insp of Plant Equipment & Start Test of Diesel Generators Implemented"
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The following pages link to PNO-V-86-039, on 860708,earthquake w/6.0 Reading on Richter Scale Actuated Seismic Alarms & Recording Instruments. Procedures for Visual Insp of Plant Equipment & Start Test of Diesel Generators Implemented:
Displayed 50 items.
- ML20138B487 (← links)
- PNO-V-85-068, on 851003,while Operating at 50% Power,Reactor Trip Occurred After Loss of Electric Power.Three Reactor Coolant Pumps Restarted by Resetting Pump Circuit Breaker Lockout Relays.Cause Under Investigation (← links)
- PNO-V-85-067, on 851002,earthquake of Magnitude 5.0 on Richter Scale Occurred.Epicenter Located Approx 50 Miles North of Site.Event Minor,Not Felt by Site Personnel & Did Not Activate Recording Instruments (← links)
- ML20137L392 (← links)
- ML20137H596 (← links)
- PNO-V-86-003, on 860109,during Full Power Turbine Trip Test Following Turbine Trip/Reactor Trip,Electrical Buses Which Supply Power to Reactor Coolant Pumps Failed to Transfer to Alternate Source.Restart Plans Unknown (← links)
- PNO-V-85-078, on 851121,unit Experienced Loss of Auxiliary Transformer C,Resulting in Loss of Control Room Lighting Due to Abnormal Breaker Lineup.Plant Shut Down (← links)
- PNO-V-85-076, on 851108,licensee Reported That Studs in RCS Line Stops a & B Did Not Meet Hardness Requirements.Relief from 10CFR50,App A,Gdc 4 Requested to Preclude Retorquing Studs (← links)
- PNO-V-85-058, on 850912,unusual Event Declared After Main Turbine Tripped During Load Rejection Test.Low Voltage Tripped Reactor Coolant Pumps.Overcooling RCS Caused Decrease in Safety Injection Setpoint (← links)
- PNO-IV-97-038, on 970629,Unit 2 Entered Mode 3 & Mode 4 in Preparation for Draining to Midloop.Two Charging Lines to RCS Did Not Have Balanced Flow.Same Valve Was Found to Be Partially Stuck Closed in Units 2 & 3.Plant Shutdowned (← links)
- PNO-V-86-012, on 860327,loss of Both Shutdown Cooling Trains Experienced Due to Loss of Pump Suction & Cavitation.Caused by Reactor Vessel Water Vortexing Causing Air to Be Pulled Into Shutdown Cooling Lines (← links)
- ML20140G325 (← links)
- ML20140F593 (← links)
- ML20138P075 (← links)
- PNO-V-85-088, on 851216,ventilation Fan in Train a balance- of-plant ESFAS Auxiliary Relay Cabinet Tripped Off & Caused Cabinet to Overheat.Trip Resulted in Logic Cards Malfunctioning.Licensee Actions Under Review (← links)
- PNO-V-85-073, on 851029,13.8 Kv Bus SO3 Feeder Breaker to 13.8 Kv Bus SO1 Tripped Open on Generation of Electrical Fault,Damaging Portion of Bus Bar.Cause Unknown.Plant Entered Cold Shutdown.Investigation Continuing (← links)
- PNO-V-85-085, on 851210,reactor Tripped from 100% Power. Caused by Low Steam Generator Water Level Resulting from Main Feedwater Header Containment Isolation Valve Drifting Shut.All ESF Sys Functioned as Required.Reactor Restarted (← links)
- PNO-V-85-052, on 850805 & 08,breaker Power Switches on Control Element Drive Mechanism Panels Found Closed.Two 13.8 Kv Electrical Breaker Incidents Under Licensee Review to Determine If Tampering Involved (← links)
- ML20134A975 (← links)
- PNO-V-85-072, on 851024,reactor Tripped from 80% Power During Scheduled Loss of Load Test.Cause Undetermined.Util Requested Assistance from C-E to Determine Cause of Trip & Cooldown of RCS (← links)
- ML20133N392 (← links)
- PNO-V-85-069, on 851003 & 08,loss of Normal Electric Power Resulted in Reactor Trip.Caused by Switchyard Electrical Distribution Malfunction.Licensee Proceeding W/Design Change to hard-wire Control for Feeder Breakers (← links)
- PNO-V-85-050, on 850726,while Preparing to Cool Down from 55-day Hot Functional Test Run,Alarm Received That Breaker Control Switch Operated W/O Authorization from Remote to Local Position.Cause Under Investigation (← links)
- PNO-V-85-059, updating PNO-V-85-058:on 850912,reactor Trip & Safety Injection Occurred.Caused by Open Atmospheric Dump Valve,Open Main Steam Line Low Point Drain Valves & Use of Auxiliary Feedwater Pump (← links)
- PNO-V-85-048, on 850724,licensee Determined That Plant Outage of Greater than 7 Days Expected to Repair Main Condenser. Caused by Damage to Two Condenser Tubes & Heater Drain Tank Inlet Shroud Due to Broken Condenser Baffle (← links)
- PNO-V-85-041, on 850708,during Preoperational Hot Functional Test,Auxiliary Spray,Atmospheric Dump & Other Valves Manipulated from Location Other than Control Room.Probably Caused by Manipulation from Remote Shutdown Panel (← links)
- PNO-V-85-043, on 850711,unidentified RCS Leakage of Approx 1.30 Gpm Discovered.Unusual Event Declared & Licensee Prepared to Shut Down Reactor.Search for Source of Leakage Continuing.Resident Inspectors Following Licensee Actions (← links)
- PNO-V-85-027, updates PNS-V-85-02 Re Arrest of Six Licensee & Contractor Employees for Offsite Drug Sales.On 850515,13 Addl Employees Suspended Pending Investigation.Course of Action Expected by 850520 (← links)
- PNO-V-89-017, on 890315,Palo Verde Unit 2 Initiated Voluntary Shutdown Due to Failures of Adv to Operate at Units 1 & 3.Unit 2 Will Remains in Mode 3 Until Advs Are Demonstrated to Be Operable (← links)
- PNO-V-85-034, on 850603,maint Electrician Injured While Working in Machine Shop Outside of Protected Area.Caused by Piece of Matl Penetrating Electrician Skull During Buffing.Worker Died (← links)
- PNO-V-86-009, on 860227,unusual Event Declared When Small Leak from Pressurizer Instrument Top Weld Discovered. Borating Began to Achieve Necessary Shutdown Margin.Cooldown & Leak Repair Planned (← links)
- PNO-IV-98-041, on 980918,control Room Operators Observed Alarm on One Channel of Main Condenser Steam Jet Air Ejector Radiation Monitoring Equipment,Which Indicated That Activity of Condenser Exhaust Had Increased by About Two Decades (← links)
- ML20151X835 (← links)
- PNO-V-88-044, on 880627,earthquake Occurred 5 Miles East of Santa Cruz,Ca.Seismic Instrumentation Not Triggered at Vallecitos,Aerotest Operations or at Univ of California at Berkeley (← links)
- PNO-V-88-015, on 880221,safety Injection & Containment Isolation Actuation Signals Received Due to Low Pressurizer Pressure Signal.Caused by Incorrect Bypass of Pressurizer Low Pressure Protection When Unit Entered Mode 5 (← links)
- PNO-V-88-012, on 880211,moderate Earthquake,Measuring 4.7 on Richter Scale,Hit Whittier,Ca Area.No Seismic Alarms Activated at Plant.No Damage Identified at Site (← links)
- PNO-V-93-016, on 930828,plant Restarted After Refueling Outage That Proceeded Tube Rupture Event on 930314.Cause of Tube Rupture Was Due to Intergranular Attack.Unit 3 Operating at 100% Power (← links)
- PNO-V-88-002, on 880116,reactor Shutdown Commenced for More than 48 H Due to Alarms on Main Generator Hydrogen Detraining Unit.Caused by Hydrogen Leak Into Stator Cooling Water Sys in Main Generator.Visual & Sonic Insps Performed (← links)
- PNO-V-88-014, on 880219,inadvertent Safety Injection Actuation Occurred While Testing of Actuation Logic Matrix Was in Progress & W/Unit at 100% Power.Unit Stabilized W/O Complication & Safety Injection Components Restored (← links)
- PNO-V-86-030, on 860527,all Four Channels of Reactor Coolant Low Flow Reactor Trip Protection Declared Inoperable While Unit 1 at 100% Power & Unit 2 at 10E-3% Power.Caused by Misset Rate & Step Channels of Low Flow Trip (← links)
- ML20195C188 (← links)
- ML20195C181 (← links)
- PNO-V-88-038, on 880612,earthquake Occurred on Calaveras Fault within 50 Miles of Identified Facilities.All Reactors Shutdown at Time of Earthquake.No Seismic Trips Observed. Insp Revealed No Signs of Damage at Facilities (← links)
- ML20199F619 (← links)
- PNO-V-86-005, on 860618,technicians Performing Initial Sys Checks of Fire Detection Sys Discovered That Internal Wiring for at Least 1 of 18 Panels Modified,Causing Damage to Internal Components (← links)
- PNO-V-86-032, on 860612,facility Resumed Operation After Second Refueling Outage.Outage Included Replacement of Reactor Coolant Pump Seal Packages & Testing motor-operated Valves Per IE Bulletin 86-003 (← links)
- PNO-V-81-025, on 810426,onsite Seismic Trigger Tripped Alarm. Some Licensee Personnel Stated That Slight Earthquake Was Felt During Time of Alarm Trip.Upon Insp of Facility,No Damage Was Found (← links)
- PNO-V-83-061, on 831216,Region V Office Received Telephone Inquiries from Knxt Television in Los Angeles & Office of Senator a Cranston in Washington Re 1982 Incident Re Contaminated Sewage from San Onofre Nuclear Station (← links)
- PNO-V-90-034, on 900728,unit 2 Was Shutdown to Inspect & Repair SG Feedrings,As Result of Degradation Found During Insp of Unit 3 SG Feedrings & Other Listed Work Was Performed (← links)
- PNO-V-90-001, on 891230,while at 12% Reactor Power W/Main Generator Sypplying Power to Grid Plants Unit 3 Phase a Main Transformer Experienced Internal Fault,Which Caused Immediate Trip of Main Generator Output Breakers (← links)