Pages that link to "PNO-IV-85-010, on 860403,noble Gas Release of 96 Mci Over 1 H Period Occurred.Caused by Helium Circulators & Purification Sys Loss Due to Partial Loss of Offsite Power During Blizzard.Power Restored"
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The following pages link to PNO-IV-85-010, on 860403,noble Gas Release of 96 Mci Over 1 H Period Occurred.Caused by Helium Circulators & Purification Sys Loss Due to Partial Loss of Offsite Power During Blizzard.Power Restored:
Displayed 39 items.
- ML20141D869 (redirect page) (← links)
- PNO-IV-85-010 (redirect page) (← links)
- PNO-IV-80-010, on 800304,hydraulic Oil Fire Occurred in Turbine Bay.Caused by Hydraulic Oil Leakage from Valve Flange on to Hot Steam Traps.Fire Extinguished Immediately by Security Guard.Platteville Fire Dept Notified (← links)
- PNO-IV-80-009, on 800228,State of Co Will Conduct Emergency Response Exercise to Test State & Local Emergency Plans. Members of Interagency Regional Advisory Committee & Region 4 Will Observe & Critique Exercise (← links)
- PNO-IV-88-025, on 880404,following Manual Reactor Scram, Unplanned Release of Noble Gas Occurred When Relief Valve Opened to Relieve Pressure in Vent Line Between the Core Support Floor & Waste Gas Sys (← links)
- PNO-IV-88-054, on 880705,reactor Shut Down to Commence 99-day Planned Outage to Replace Fasteners Associated W/Helium Circulators.Licensee Schedule Calls for Return to Operations on 881007.Region IV Prepared to Respond to Media Inquiries (← links)
- PNO-IV-88-011, on 880210,helium Circulator Tripped Due to Erroneous Low Speed Signal W/Reactor at 75% Power.Reactor Operators Manually Srammed Reactor from 25% Power W/One Helium Circulator Running.State of Co Informed (← links)
- PNO-IV-84-014, on 840623,reactor Tripped on High Pressure Signal & 6 of 7 Control Rod Pairs Failed to Drop.Cause Unknown.Drive Mechanisms Will Be Removed for Exam (← links)
- PNO-IV-86-012, on 860411,turbine Trip Occurred Due to Faulty electro-hydraulic Control (EHC) Card Following Synchronization W/Grid for First Time Since June 1984.EHC Card Repaired & Plant Returned to Grid on 860412 (← links)
- ML20207G405 (← links)
- PNO-IV-87-019, former Manager of Nuclear Production Convicted & Sentenced to 3 Yrs.Conviction Resulted from Guilty Plea & Plea Bargaining.Three Others Indicted at Same Time for Related Offences Have Not Yet Come to Trial (← links)
- PNO-IV-87-018, on 870417,reactor Taken Critical.First Criticality Since Reactor Shut Down on 860531 for Outage to Make Mods.Plant Under 10% Power Restriction for Operator Effectiveness Evaluation & Drying Out of Reactor Core (← links)
- ML20213C926 (← links)
- ML20212P001 (← links)
- ML20249A870 (← links)
- ML20249A746 (← links)
- ML20249A089 (← links)
- ML20249A082 (← links)
- ML20248L067 (← links)
- ML20248J884 (← links)
- PNO-IV-89-036, on 890529,two Teenagers Shot by off-duty Security Guard Following Confrontation Re Assault.Guard Arrested & Being Held for Murder.Licensee Plans to Issue Press Release.State of Co Will Be Informed.Record Copy (← links)
- PNO-IV-89-055, on 890829,Board of Directors Directed Termination of Nuclear Operations at Facility for 100-day Cooldown Period in Preparation for 30-month Reactor Defueling.Nrc Currently Reviewing Defueling Safety Analysis (← links)
- PNO-IV-89-044, on 890628,pressure in Waste Gas Receiver a Decreased from 250 Psig & Pressure in Receiver a Decreased from 60 to 50 Psig.Caused by Erroneous Valve Lineup.Plant Stack Monitors Did Not Alarm (← links)
- PNO-IV-89-040, from 890622-23,power Exceeded 82% & Secondary Heat Balance Indication in Control Room Read Approx 79.2%.On 890623,discovered Incorrect Input Into Secondary Heat Balance Calculation.Power Reduced to 65% Pending Evaluation (← links)
- PNO-IV-89-031, on 890427,CRD 3 Failed to Insert on Scram During Performance of Weekly Partial Insertion Scram Tests. Troubleshooting Confirmed That CRD Brake Deenergized & That Rod Out Limit Cleared.Licensee Plans to Replace CRDs 3 & 7 (← links)
- ML20236V359 (← links)
- PNO-IV-87-035, licensee Initiated Plant Shutdown,Estimated to Last Approx 35 Days,To Replace Helium Coolant Circulation 1D.Circulation Developed Wobble & Penetration Interspace Seal Leak of Purified Helium.State of Co Will Be Informed (← links)
- PNO-IV-87-052, on 871002,reactor Tripped Due to Loss of Both Reactor Coolant Flow Loops Due to Fire in Turbine Bldg. Caused by Failure of Hydraulic Sys Filter.Reactor Manually Tripped,Alert Declared & Fire Extinguished (← links)
- ML20217A331 (← links)
- PNO-IV-89-052C, updates 890818,21 & 23 Unplanned Reactor Shutdowns Due to Inoperable Control Rod.Control Rod Assembly Will Be Removed Using Bldg Crane.Aluminum Shutter Will Be Remotely Placed on Bottom of Canister (← links)
- PNO-IV-89-052B, on 890823,unplanned Reactor Shutdown Due to Inoperable Control Rod.Licensee Plans to Remove Control Rod Pair W/Bldg Crane in Unshielded Configuration to Shielded, Contained Evolution (← links)
- PNO-IV-89-052A, on 890818,after Attempting to Withdraw & Insert Control Rod Pair from Region 19,control Rod Motor Stopped Drawing Current & Indicated Open Conductor or Thermal Overload.Pair Will Be Withdrawn Using Bldg Crane (← links)
- PNO-IV-89-052, on 890817,unplanned Reactor Shutdown Due to Inoperable Control Rod Drive Occurred.Attempts to Clear Cause of Slack Cable Light Failed.Loop 2 Shutdown Due to Upset in Bearing Water Sys Occurred During Plant Shutdown (← links)
- PNO-IV-87-025, on 870427,received Permission to Take Reactor at Power Levels Above 10%.On 870430,generator Synchronized W/Grid.Licensee Will Conduct Operations at Less than 35% Power Until Certain Technical Issues Resolved (← links)
- PNO-IV-86-029, util Announced Expense Write Down of Company Assets in Amount of $75-100 Million,Study of Alternatives Re Future Operations & Approval of Settlement Agreement W/ Litigating Parties in Suits Before State of Co (← links)
- PNO-IV-87-020, augmented Insp of Low Power Operations Led Region to Conclude That Plant Being Operated in Prof & Conservative Manner.Licensee Conducting Surveillance Testing (← links)
- PNO-IV-84-014A, on 840626,licensee Committed to Maintain Fort St Vrain in Shutdown Condition Until Cause of Failure of Six Rod Pairs to Drop on Reactor Trip Identified,Corrective Measures Taken & NRC Authorizes Return to Operations (← links)
- PNO-IV-85-037A, on 850721,criticality Achieved.Crd Assemblies Refurbished & Bolting in All Four Circulators & Reserve Shutdown Hopper Matl Replaced During Prolonged Shutdown Since 840623 (← links)
- PNO-IV-85-037, on 850719,confirmation of Action Ltr Issued Permitting Reactor to Return to Operation at Power Levels Not to Exceed 15% of Rated Power,Pending Resolution of Questions Re Equipment Qualification (← links)