Pages that link to "PNO-V-86-046, on 860721,two Seismic Events Occurred in Mammoth Lakes Area.Largest Event Measured 6.2 on Richter Scale & Second Measured 4.4.First Event Not Felt at Diablo Canyon.Second Event Triggered Teratec Recording"
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The following pages link to PNO-V-86-046, on 860721,two Seismic Events Occurred in Mammoth Lakes Area.Largest Event Measured 6.2 on Richter Scale & Second Measured 4.4.First Event Not Felt at Diablo Canyon.Second Event Triggered Teratec Recording:
Displayed 50 items.
- PNO-V-85-081, on 851201,turbine & Reactor Trips Occurred. Caused by High Steam Generator Level Due to Sluggish Automatic Steam Generator Level Control Sys Response.No Safety Injection or ECCS Activated (← links)
- PNO-V-85-082, on 851202,low Tide Concurrent W/High Seas Caused Kelp to Be Injected Into Condenser Circulating Water Intake Structure.Control RPI Lost & Reactor Manually Tripped.Cause Under Investigation (← links)
- PNO-V-85-080, on 851128,oscillation of Steam Flow Resulted in Reactor Trip Due to Completion of Steam Generator Low Level Coincident W/Steam Flow/Feedwater Flow Mismatch Logic. Cause Will Be Determined Prior to Resuming Operations (← links)
- PNO-V-85-079, on 851126,safety Injection Occurred on High Steam Flow Signal.Cause Under Investigation.Plant Stabilized & Maintaining Hot Standby Conditions.Licensee Plans to Evaluate Data & Make Appropriate Adjustments (← links)
- PNO-V-85-055, on 850820,initial Criticality Achieved W/Boron Concentration within Expected Acceptance Criteria for Estimated Critical Conditions.Low Power Physics Testing in Progress & Expected to Be Completed in 7 Days (← links)
- PNO-V-86-001, on 860102,unusual Event Declared When Reactor Tripped on lo-lo Steam Generator Level Following Feedwater Pump Trip.Caused by Reactor Coolant Pumps Tripping on Undervoltage.Pumps Restarted in 3 to 5 Minutes (← links)
- PNO-V-85-056, on 850829,reactor Tripped from 4% Power.Caused by Low Steam Generator Level Concurrent W/Steam Flow/ Feedwater Flow Mismatch During Surveillance Testing. Licensee Investigating Potential Equipment Problems (← links)
- PNO-V-86-010, on 860312,reactor Brought Critical Following Negative Rate Trip During Net Load Startup Test on 860311. Reactor Declared in Commercial Operation on 860313 (← links)
- PNO-V-85-038, on 850626,press Conference Held to Announce That Nine People Charged W/Felony Sale of Drugs Offsite as Result of 8 Months Undercover Drug Investigation.No Licensee Employees Charged (← links)
- ML20140G325 (← links)
- ML20140F593 (← links)
- PNO-V-85-091, on 851225,during Full Load Rejection Test, Reactor Tripped on lo-lo Steam Generator Level & Coolant Pumps Tripped.Caused by over-responsive Turbine Control Sys & under-responsive Steam Dump Sys.Pumps Restarted (← links)
- PNO-V-85-074, on 851030,cold Shutdown Occurred.Caused by Condenser Tube Leak.Leak Location Not Determined.Plans to Drain & Refill Steam Generators Underway (← links)
- ML20138E194 (← links)
- PNO-V-85-053, on 850814,grass Fire Occurred,Burning Approx 80 Acres.Caused by Automobile Accident on Plant Access Road, Approx 2.5 Miles South of Plant.Licensee Requested Assistance from State of CA Div of Forestry (← links)
- ML20134A975 (← links)
- PNO-V-85-051, on 850804,two Earthquakes Measuring 4.6 & 5.5 on Richter Scale Occurred 70 Miles from Facility.Primary Seismic Recording Equipment Failed to Trigger as Setpoint Higher than Acceleration Experienced at Site (← links)
- PNO-V-85-047, on 850721-22,interference Problem W/Upper Lateral Support Bumper Block Assemblies on Steam Generators Identified.Originally Discovered During Hot Functional Testing in Late 1984.Bumper Installation Modified (← links)
- PNO-V-85-040, on 850708,licensee Informed Region That Site Unaffected by Current Brush Fires.On 850707,fire Caused 45 Minute Outage to Emergency Notification Sys (← links)
- PNO-V-85-029, on 850518 & 20,reactor Trip & Safety Injection Occurred Due to Loss of Vital Instrument Ac Power.Caused by Failure of Transformer in Vital Instrument Ac Inverter IY-13 & IY-12 Output Breaker Tripping Open (← links)
- PNO-V-86-013, on 860330,while Reducing Power Due to Indications of Condenser Tube Rupture,Operator Initiated Manual Unit Trip Resulting in Safety Injection on High Steam Flow & lo-lo Tavg.Caused by Switch Problem & Stuck Valve (← links)
- PNO-V-86-011, on 860314,during Main Turbine Testing,Safety Injection & Reactor Trip Occurred from High Steam Flow Signal.Plant Stabilized.Licensee Will Resume Operations Once Event Evaluated & Excess Boron Removed (← links)
- PNO-V-86-008, on 860219,unusual Event Declared & Hot Shutdown Initiated After Boron Sample Exceeded 2,200 Ppm.Unusual Event Terminated When Primary Std for Boron Analysis Determined to Be Faulty (← links)
- PNO-V-88-048, on 880717,unit Manually Tripped & Natural Cooldown Commenced as Result of Ground Fault in 12 Kv non- Vital Buses.Event Investigation Team Formed to Determine Location & Cause of Ground Fault (← 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-88-038, 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)
- PNO-V-84-017, on 840331-0401,licensee Discussed Main Steam Safety Valve Failure,Inoperable Radwaste Valve & Loss of Control Room Annunciation (← links)
- PNO-V-84-023, on 840422,seal Water Leak Developed Past Mechanical Seal in Reactor Coolant Pump 14.Cause Unknown.Rcs Cooled.Problem Will Be Corrected Prior to Proceeding Further Toward Initial Criticality (← links)
- PNO-V-83-028, on 830718,licensee Representative Called Region V Office to Report That PG&E Determined That Less than Min Wall Thickness Existed in RCS at Location of Gouges Previously Identified on 830419 (← links)
- PNO-V-87-028, on 870403,reactor Tripped from 12% Power During Shut Down for First Refueling Outage.Caused by Flicker of High Steam Flow Bistables Coincident w/lo-lo T Average.Investigation Continuing (← links)
- PNO-V-87-025, on 870321,facility Experienced Safety Injection,Reactor Trip & Unit Trip.Caused by Coincidence of High Steam Flow & Low Steam Generator Pressure Signals Due to Closure of MSIV FCV 41.Piping & Valve Switches Inspected (← links)
- PNO-V-86-027, on 860505,diesel Generator Unexpectedly Started & Loaded on Vital Bus G Undervoltage Condition.Auxiliary Feeder Breaker Tripped on Overcurrent & Startup Power Feeder Breaker Did Not Close In.Investigation Underway (← links)
- PNO-V-86-067, on 861001,fuel Assembly in Vessel Found W/ 10-degree Tilt & Resting Askew Against Core Baffle Plate. Cause Under Investigation.Program & Special Tools Prepared to Return Assembly to Vertical Position (← links)
- PNO-V-86-065, on 860918,reactor Tripped Due to Loss of Main Feedwater Pump 2-2 During Maint on Lovejoy Speed Controller Sys.Caused by Steam Flow/Feed Flow Mismatch Coincident W/Low Level on Steam Generators 2 & 4.Cause Under Investigation (← links)
- PNO-V-92-033, on 921019,US Geological Survey Notified California Governor Ofc of Significant Likelihood That Earthquake of Magnitude 6 Will Occur on San Andreas Fault Near Parkfield (← links)
- PNO-V-86-019, on 860418,unusual Event Declared on Initiation of Shutdown.On 860417,problems W/Computer Info from in-core Instrumentation for Quadrant Power Tilt Ratio Measurement Occurred (← links)
- PNO-V-91-003, on 910307,unit 1 Shutdown for Refueling Operations & Loss of Offsite Power.Licensee Personnel Manually Moved New Module,Still in Mast,Away from Reactor Vessel & Core (← links)
- PNO-V-86-040, on 860709,reactor Tripped Due to Low Level in Steam Generator Coincident W/Steam Flow Feed Flow Mismatch. Caused by Loss of Main Feed Pump.Pump Repaired & post-trip Review Conducted (← links)
- PNO-V-86-038, on 860703,facility Experienced Reactor Trip & Safety Injection Due to Momentary High Steam Flow Coincident w/lo-lo Tavg Signal from solid-state Protection Sys.On 860706,second Turbine & Reactor Trip Experienced (← links)
- PNO-V-87-002, on 870105,reactor Trip/Turbine Trip Occurred. Caused by Loss of Turbine Governor/Stop Valve electro- Hydraulic Sys Pressure,Attributed to Leak in Compression Fitting Connection to Steam Lead Stop Valve FCV-145 (← links)
- PNO-V-87-001, on 870102,licensee Shut Down Plant.Caused by Fire Near High Pressure Turbine Front Bearing.Licensee Affected Repairs & Examining Bearing Area for Any Signs of Oil Leak (← links)
- ML20207J559 (redirect page) (← links)
- PNO-V-86-046 (redirect page) (← links)
- PNO-V-86-062, court Decided in Favor of San Luis Obispo Mothers for Peace & Sierra Club Re Spent Fuel Pool Expansion.Util Reinstalling Old Racks & May Use Spent Fuel Pools Prior to Completion of New Hearings (← links)
- PNO-V-86-056, on 860829,first Refueling Outage Began.Work to Include Copper Reduction & court-ordered Replacement of New High Density Fuel Racks W/Older Low Density Fuel Racks (← links)
- PNO-V-86-057, reactor Trip Occurred.Caused by Loose Wire on Shunt Coil Relay That Shorted During Surveillance Testing & Opened Reactor Trip Breaker.New High Density Fuel Racks Removed & Older Low Density Racks Reinstalled (← links)
- ML20209D513 (← links)
- PNO-V-87-018, on 870301,1-2 Mw/Min Shutdown Initiated to Investigate & Repair Main Generator Hydrogen Coolant Leak. Vibration,Induced by Main Generator,Caused Cracking in Welds of Stator Cooling Water Sys Which Occurred on 870217 (← links)
- PNO-V-87-083, on 871213,reactor Tripped.Caused by Loss of Feed Water Pump 1-1.Cause of Trip Under Investigation. Variety of Maint Activities to Be Performed Before Restart (← links)
- PNO-V-87-082, on 871210,fire Occurred in Temporary Tool Storage Trailer in Vicinity of Unit 2 Main Generator Transformers.Caused by 120 Volt Junction Box,Possibly Overloaded from Portable Space Heater.Fire Put Out (← links)