Pages that link to "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"
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The following pages link to 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:
Displayed 50 items.
- ML20138B487 (← 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-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-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)
- ML20138P075 (← 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)
- ML20133N392 (← 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)
- ML20154B295 (redirect page) (← links)
- PNO-V-86-009 (redirect page) (← 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)
- 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-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-86-032, 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-86-052, on 860805,reactor Trip Initiated by Turbine Load Rejection When Control Valves Closed,Causing Insurge of Water Into Pressurizer.Cause Under Investigation (← links)
- PNO-V-83-018, on 830421,util Received Ltr from C-E Informing of Error in Equivalent Voltages Corresponding to Setpoints Associated W/Steam Generator High Delta Pressure Trip Function.Corrective Action Being Developed (← links)
- PNO-V-86-049, on 860729 & 30,pressure Transmitter 459 Failed Low Resulting in Steam Flow/Feed Flow Mismatch Trip Circuits Becoming Inoperable.Caused by Failed Electric Card in Pressure Transmitter Amplifier.Amplifier Replaced (← links)
- PNO-V-82-046, on 821117,steam Generator Water Chemistry Analyses Identified Chloride Levels Near 250 Ppm.Caused by One or More Tubes Rupturing in Main Condenser.Power Level Ramped Down.Ruptured Tubes Plugged within 4 H (← links)
- PNO-V-86-043, on 860715,criticality Achieved Following Eighth Refueling Outage.Unit Shutdown for 236 Days Following 851121 Loss of Power & Water Hammer Event.Unit Scheduled to Go on-line After Completion of Low Power Physics Testing (← links)
- PNO-V-91-016, on 910808,transmitter on Volume Control Tank Failed.Level Transmitter Repaired.Licensee Conducting Confirmatory Testing of Transmitter (← links)
- PNO-V-91-014, on 910715,licensee Inadvertently Drained 7,000 Gallons of Water from Spent Fuel Pool.Caused by Procedural Weakness.Health Physics Personnel Surveyed Area & Found Min Activity.Util Currently Removing Water from Radwaste Bldg (← links)
- PNO-V-86-045, on 860717,reactor Trip Occurred from 3% Power. Caused by Momentary Drop in Voltage Through break-before- Make Switch.Momentary Drop Allowed Permissive P7 to Unblock & Trip Signal Went to Reactor Protection Sys (← links)
- PNO-IV-99-018, on 990305,declared SONGS Units 2 & 3 Alert Because Potential Bomb Threat Occurred.Device Was 12-inch long,2-inch Diameter Copper Pipe,With Both Ends Capped. Licensee Notified State & Local Officials (← links)
- PNO-V-87-021, on 870310,reactor Tripped Due to Turbine Trip from Grounded Exciter.Caused by Maint Personnel Dropping Exciter Brush in Rigging.Licensee Plans Shutdown of Unit for 1 Wk to Perform Maint (← links)
- PNO-V-86-080, on 861113,unit Shut Down to Correct Lube Oil Leak on Inboard Motor Bearing of West Main Feed Pump. Leakage Was Through Labyrinth Seal Associated W/Bearing. Bearing Seal Disassembled for Evaluation (← links)
- PNO-V-87-017, on 870223,licensee Informed Region V That Press Release Made Re 870221 Discovery of Small Particle of Radioactive Matl in Employee Home.Caused by Exposure to Leaking Fuel Pins.Region Will Conduct Special Insp (← links)
- PNO-V-87-059, on 870831,five People Involved in Operating Cooling Suction Valve 2HV-9378 Found Contaminated by I-131 Due to Unisolable Leak in Valve.Caused by Failure of Valve & Valve Packing.Nature of Failure Under Investigation (← links)
- ML20237A131 (← links)
- ML20249A832 (← links)
- ML20249A814 (← links)
- ML20248H933 (← links)
- ML20248H837 (← links)
- PNO-V-87-067, on 871007,licensee Reported That Recently Completed Single Failure Analyses Had Identified Potential Single Failures Which Had Not Previously Been Known.Lists Potential Single Failures Associated W/Esfs (← links)
- PNO-V-87-065, on 871004,significant Aftershock Experienced from 871001 Earthquake.Aftershock Registered 5.5 on Richter Scale.Seismic Instruments Actuated at 0.014g at Unit 1.No Damage to Equipment Occurred (← links)
- PNO-V-87-063, on 871001,moderate Earthquake Experienced at Plant.Unusual Event Declared.No Damage Identified at Site. Util Headquarters Evacuated to Inspect for Structural Damage (← links)
- ML20234D183 (← links)
- ML20217F843 (← links)
- ML20217F770 (← links)
- PNO-IV-99-043, on 991016,earthquake of Magnitude 7 Occurred. Plant Operations Were Not Disrupted.Unusual Event Classifications Were Exited within 1 H at Both Facilities.No Damage Was Indicated & No Residual Plant Effects Observed (← links)
- PNO-V-87-047A, on 870621,interruption in Power to Phase B of non-1E Uninterruptible Power Supply Caused Sharp Reduction in Feedwater Control Valve for Steam Generator 88,causing Reactor Trip.Update Confirms Operation of Safety Functions (← links)
- PNO-V-87-047, on 870621,interruption in Power to Phase B of non-1E Uninterruptable Power Supply Caused Sharp Reduction in Feedwater Flow to Steam Generator 88 & Subsequent Reactor Trip.Caused by Loose Cable Plug Lug.Lugs Inspected (← links)
- PNO-V-86-091, on 861210 Turbine Tripped Due to Interruption of Power to non-1E Instrument Bus,Causing Reactor Trip. Event Under Investigation.Steam Bypass Control Sys Did Not Operate Because of Deenergized Instrument Bus (← links)
- ML20215C727 (← links)