Pages that link to "PNO-V-88-021, on 880315,leak of About 100 Gpm Occurred from Downstream Pressure Relief Valve While Opening Upstream Isolation Valve.Approx 650 Gallons of Water Released.No Radioactivity Released.Investigation Underway"
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The following pages link to PNO-V-88-021, on 880315,leak of About 100 Gpm Occurred from Downstream Pressure Relief Valve While Opening Upstream Isolation Valve.Approx 650 Gallons of Water Released.No Radioactivity Released.Investigation Underway:
Displayed 50 items.
- PNO-V-85-066, on 851002,loss of Main Feedwater Event Occurred.Plant Being Maintained in Hot Shutdown Condition Pending Determination of Exact Scenario,Causes & Appropriate Corrective Action.Region Evaluating Response (← links)
- ML20137G897 (← links)
- ML20136J106 (← links)
- PNO-V-85-092, on 851226,reactor Tripped.Caused by Loss of Electrical Power to Integrated Control Sys.Augmented Investigation Team Onsite on 851228 & Completed All Initial Interviews of All Operating Staff as of 851229 (← links)
- ML20136B030 (← links)
- ML20135G579 (← links)
- PNO-V-88-023, on 880323,undervoltage Attachment of CRD Breaker Failed to Operate.Interference of Undervoltage Attachment Trip Lever W/Exterior Label Plate,Noted. Investigation Continuing (← links)
- ML20148C252 (redirect page) (← links)
- PNO-V-88-021 (redirect page) (← links)
- ML20147H084 (← links)
- PNO-V-88-016, on 880224,RK Byrne Recommended Closure of Plant to Board of Directors at 880224 Meeting.Recommendation Will Be Considered by Board for Action on 880303.Licensee Continuing Loss of Offsite Power Testing (← links)
- PNO-V-86-014, on 860331,earthquake W/Magnitude of 5.3 on Richter Scale Occurred Approx 10 Miles East of Fremont,Ca.No Damage Observed at Research Reactor Facilities.Rancho Seco Did Not Feel Effects of Earthquake (← links)
- PNO-V-85-090, on 851226,reactor Trip Occurred Due to Loss of Electrical Power to Integrated Control Sys.Reactor Coolant Pressure Stabilized.Power Restored.Plant Will Go to Cold Shutdown Until Root Cause Analysis Completed (← links)
- PNO-V-85-089, on 851222,shutdown Occurred When RCS Leak Detected.Caused by Loose Valve Stem Packing on Pressurizer Sample Line Valve Sfv 70001.Loose Packing Readjusted. Repacking of Valve Planned.Power Will Be Resumed by 851224 (← links)
- PNO-V-85-087, on 851215,steam Leak Discovered in Room Where Normal Reactor Coolant Makeup Pump Located.Simultaneously, Auxiliary Bldg Radiation Alarm Received.Leak Isolated to Discharge Piping Weld (← links)
- PNO-V-85-083, on 851205,reactor Tripped from 91% Full Power on High RCS Pressure.Caused by Stuck High Indicating Pin on Feedwater Flow Monitor Causing Operator to Manually Underfeed Both once-through Steam Generators (← links)
- PNO-V-85-075, on 851102,plant Attained Criticality & Commenced Power Operation on 851103.Plant Has Been Shut Down Since 851002 Due to Loss of Main Feedwater Event (← links)
- PNO-V-85-071, on 851007,one of Two Auxiliary Feedwater Pumps Declared Inoperable Due to Failure of Pump Thrust Bearing. Caused by Disintegrated Thrust Bearing Due to Inadequate Lubrication.Bearing Replaced (← links)
- PNO-V-85-064, on 850928,reactor Achieved Criticality.Plant in Cold Shutdown Since 850623 Due to 1-inch Diameter Hot Leg Vent Piping Failure.Exams of Other Piping Sys & Supports Completed.Plant at 40% Power (← links)
- PNO-V-85-031, on 850521,during Chemical Cleaning of Boiler, Sight Glass Fitting on Large Auxiliary Boiler Failed While Boiler at Approx 130 Psi Steam Pressure.Cause Not Stated. Plant Shut Down Since 850315 for Refueling Outage (← links)
- PNO-V-85-036, on 850618,facility Manually Shut Down from 15% Power Due to Flow Blockage in Main Turbine Lubricating Oil Sys.Turbine Must Be Secured,Vacuum Broken in Condenser & Primary Plant Cooled to 230 F.Shutdown Will Last 4 Days (← links)
- PNO-V-80-016, on 800305,Region 5 Mgt Met W/Licensee at Site to Discuss Valve & Electrical Noncompliance That Has Rendered Portions of HPI Sys Inoperable.Escalated Enforcement Will Be Requested 800314 (← links)
- PNO-V-80-001, on 800109,members of Ibew Voted 522 to 27 to Authorize Strike on 800114.Approx 51% of Site Employees Are Members.Resident Inspector Has Completed Prestrike Insp Requirements (← links)
- PNO-V-88-030, on 880504,reactor Tripped & Leak Discoverd on Letdown Cooler a Relief Valve.Util Conducting post-trip Review to Determine Cause of Trip & Confirm Source of Leak (← links)
- ML20151X524 (← links)
- PNO-V-88-029, on 880429,SMUD Released Info Re Potential Agreement W/Duke Power Co (DPC) Under Which DPC Employee Would Become Chief Executive Officer,Nuclear,Reporting to New Rancho Seco Mgt Committee.Meeting Planned on 880509 (← links)
- PNO-V-88-024, util Received Final Authorization from NRR to Restart Facility on 880330.Enhanced Operational Readiness Insp Team & Resident Insp Staff Observing Reactor Startup Which Will Require 6-10 H to Complete (← links)
- PNO-V-88-017, on 880301,util Certified That All Prerequisites for non-nuclear Heatup of Plant to Normal Operating Test Temp & Pressure Completed.Reactor Criticality Scheduled for 880320 (← links)
- PNO-V-88-010, on 880207,licensee Inadvertently Drained Approx 1,100 Gallons of Slightly Contaminated Borated Water from Borated Water Storage Tank During Testing.Testing Suspended Until Investigation & Further Corrective Action Completed (← links)
- PNO-V-88-011, on 880208,fire Occurred in Annunciator Control Cabinet B During Cold Shutdown.Cause of Fire Not Yet Determined.Cabinets a & B Electronically Isolated.All Testing Temporarily Suspended.No Loss of DHR Occurred (← links)
- PNO-V-88-008, on 880203,unplanned Start of Bruce Gm Diesel Generator a Occurred.Caused by Failure to Position Generator Control Switch While Performing Loss of Offsite Power Test. Further Startup Testing Suspended (← links)
- PNO-V-88-009, on 880204,individual May Have Received 458 Rem Exposure to Back of Left Knee from 43 Uci Co-60.Caused by Individual Welding on Dhr.Licensee Investigating Matter & Will Inform Region V of Results (← links)
- ML20196B688 (← links)
- PNO-V-88-036, on 880607,voters Voted on Two Measures Re Future Operations of Plant.Measure B,Which Required Immediate Shutdown of Plant,Failed to Pass.Measure C,Which Will Continue Plant Operations on Trial Basis,Passed (← links)
- PNO-V-87-027, on 870304,util Notified by B&W in Part 21 Rept That Potential Lack of Separation Existed in High Nuclear Flux Channel of Reactor Protection Sys.Util Considers Problem Reportable Event Under 10CFR50.72 (← links)
- PNO-V-88-059, on 881024,licensee Determined That Reactor Coolant Unidentified Leakage Was 1.06 Gpm.Leakage Could Not Be Reduced.Reactor Was Shut Down.No Entry Inside Shield Permitted.Repair Method to Be Determined Upon Next Entry (← links)
- PNO-V-86-050, on 860804,Sacramento County Grand Jury Issued Rept of 8-month Investigation Finding Significant Problem W/Drugs & Alcohol Usage on Site.Rept Recommends Further Investigation by District Atty (← links)
- PNO-V-88-058, on 881014,reactor Tripped from Phase Imbalance on 6.9 Kv Power to Four Operating Reactor Coolant Pumps.Grid Disturbance,Which Affected Startup & Auxiliary Transformer Power Sources on One Offsite Power Line,Possible Initiator (← links)
- PNO-V-80-081, on 801222,while Installing Gas Monitor at 100% Power,Auxiliary Bldg Stack,Control Room & Condenser Air Ejector Radiation Monitoring Sys Alarmed & Pegged High. Caused by Wide Swings in Movement of Common Ac Power Lead (← links)
- PNO-V-80-038, during 800525-27,series of Major Earthquakes Centered in Mammoth Lakes Region of Central CA Occurred. No Effect on Operations or Structures Occurred & No Seismic Instrumentation Triggered.Diablo Canyon Not Affected (← links)
- 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 (← links)
- PNO-V-86-036, on 860701,Sacramento Bee Newspaper Reported That Smud General Manager,Dk Lowe,Resigned.Divisive Actions of Board of Directors Cited as Reason for Resignation.F Hahn Acting as Interim General Manager (← links)
- PNO-V-87-033, on 870429,C Wilcox Announced During Press Conference That C Andognini Had Been Selected as Util New Chief Executive Officer Reporting Directly to Util Board of Directors,Effective 870504 (← links)
- PNO-V-86-082, on 861117,water Observed Leaking from Spent Fuel Pool Liner Into Annulus,Through Concrete Walls Into Nonradiologically Controlled Part of Plant.Caused by Annulus Drain Valve Closed for Maint.Annulus Area Drained (← links)
- PNO-V-86-081, on 861112,worker Discovered Unattended & Loaded .38-caliber Revolver on Floor in Restroom.Security Officer Inadvertently Left Weapon in Restroom.Info Assessment Team Notified & Will Review Licensee Actions (← links)
- PNO-V-87-006, on 870115,licensee Discovered That Min Dc Bus Voltage Would Fall Below Valve Mfg Min Voltage for Steam Admission Valve to Steam Driven Auxiliary Feedwater Pump During ESF Actuation Concurrent W/Loss of Offsite Power (← links)
- PNO-V-86-047, on 860722,licensee Declared Unusual Event Due to Both Trains of Decay Heat Sys Being Declared Inoperable. RCS Temp Was Approx 84 F W/Atmospheric Pressure (← links)
- ML20245C014 (← links)
- ML20244A981 (← links)
- ML20244A614 (← links)