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| Issue date | Title | Topic | |
|---|---|---|---|
| PNO-III-99-024, on 990416,licensee Commenced Controlled Power Reduction to Approx 10% to Identify & Repair Main Generator Field Ground.Troubleshooting Efforts Are Still in Progress. Ris Monitored SD & Troubleshooting & Will Review Activities | 19 April 1999 | PNO-III-99-024:on 990416,licensee Commenced Controlled Power Reduction to Approx 10% to Identify & Repair Main Generator Field Ground.Troubleshooting Efforts Are Still in Progress. Ris Monitored SD & Troubleshooting & Will Review Activities | |
| PNO-III-98-045, on 980914,empty Type B Shipping Cask Received with Removable Contamination Levels of Approx 40,000 Dpm Per 100 Square Centimeters.Licensee Decontaminated Cask | 16 September 1998 | PNO-III-98-045:on 980914,empty Type B Shipping Cask Received with Removable Contamination Levels of Approx 40,000 Dpm Per 100 Square Centimeters.Licensee Decontaminated Cask | |
| PNO-III-97-077, on 970909,licensee Began Reactor Shutdown After Steam Leak Identified in Steam Tunnel.Leak Was on Capped Drain Line Off a Main Steam Line,Between Two Main Steam Isolation Valves.State of IA Will Be Notified | 10 September 1997 | PNO-III-97-077:on 970909,licensee Began Reactor Shutdown After Steam Leak Identified in Steam Tunnel.Leak Was on Capped Drain Line Off a Main Steam Line,Between Two Main Steam Isolation Valves.State of IA Will Be Notified | |
| PNO-III-90-046, on 900709,partial Loss of Offsite Power Occurred During Refueling Outage.Determined That Technician Failed to Insert Relay Logic Block.Licensee Reviewing Controls on Switchyard Activities.State of IA Notified | 11 July 1990 | PNO-III-90-046:on 900709,partial Loss of Offsite Power Occurred During Refueling Outage.Determined That Technician Failed to Insert Relay Logic Block.Licensee Reviewing Controls on Switchyard Activities.State of IA Notified | |
| PNO-III-89-066, on 890919,during Routine Maintenance,Licensee Identified Two Environmentally Unqualified AMP Butt Splices on Recirculation Sys Sample Line Valve in Drywell.Licensee Instituted two-phase Program to Correct Addl Splices | 3 October 1989 | PNO-III-89-066:on 890919,during Routine Maintenance,Licensee Identified Two Environmentally Unqualified AMP Butt Splices on Recirculation Sys Sample Line Valve in Drywell.Licensee Instituted two-phase Program to Correct Addl Splices | |
| PNO-III-89-018, on 890305,reactor Scrammed While Licensee Was Adjusting Main Steam Line Radiation Monitors to Perform Hydrogen Injection Testing | 6 March 1989 | PNO-III-89-018:on 890305,reactor Scrammed While Licensee Was Adjusting Main Steam Line Radiation Monitors to Perform Hydrogen Injection Testing | |
| PNO-III-86-152, on 861212,radwaste Shipment,Consisting of Spent in-core Nuclear Detectors & Control Rod Blades, Totalling 20,000 Ci,Misrouted Into State of Mn.Dot Notified | 19 December 1986 | PNO-III-86-152:on 861212,radwaste Shipment,Consisting of Spent in-core Nuclear Detectors & Control Rod Blades, Totalling 20,000 Ci,Misrouted Into State of Mn.Dot Notified | |
| PNO-III-86-143, on 861209,plant Shut Down Due to Discovery That 200 AMP Electrical Splices Supplied by GE May Not Meet Environ Qualification Requirements.Special Region III Insp Will Review Splice Problem & Licensee Corrective Action | 9 December 1986 | PNO-III-86-143:on 861209,plant Shut Down Due to Discovery That 200 AMP Electrical Splices Supplied by GE May Not Meet Environ Qualification Requirements.Special Region III Insp Will Review Splice Problem & Licensee Corrective Action | |
| PNO-III-86-116, on 861015,while Operating at 95 Percent Power,Licensee Declared Unusual Event After Both Trains of Control Room Ventilation Sys Rendered Inoperable.Caused by Test Procedures Failed to Require Control Valve Be Reset | 17 October 1986 | PNO-III-86-116:on 861015,while Operating at 95 Percent Power,Licensee Declared Unusual Event After Both Trains of Control Room Ventilation Sys Rendered Inoperable.Caused by Test Procedures Failed to Require Control Valve Be Reset | |
| PNO-III-86-104, on 860923,unit Shutdown at 4:08 Am,To Investigate Cause of High Bearing Temp on One of Recirculation Pumps.Vendor Insp Determined That Some Cells, Which Supply Control Power to Hpic Sys Valves Be Degraded | 23 September 1986 | PNO-III-86-104:on 860923,unit Shutdown at 4:08 Am,To Investigate Cause of High Bearing Temp on One of Recirculation Pumps.Vendor Insp Determined That Some Cells, Which Supply Control Power to Hpic Sys Valves Be Degraded | |
| PNO-III-85-074, on 850822,both Diesel Generators Technically Inoperable.Caused by Simultaneous Rather than Sequential Transfer of Power for Four RHR & Two Core Spray Pumps from Standby Transformers.Switches Placed in Test Position | 23 August 1985 | PNO-III-85-074:on 850822,both Diesel Generators Technically Inoperable.Caused by Simultaneous Rather than Sequential Transfer of Power for Four RHR & Two Core Spray Pumps from Standby Transformers.Switches Placed in Test Position | |
| PNO-III-85-022B, on 850719,scheduled Maint & Refueling Outage Concluded.Inservice Insp Revealed through-wall Cracks & Crack Indications on Welds in Recirculating Sys Piping. Repairs Made by Weld Overlay Method | 19 July 1985 | PNO-III-85-022B:on 850719,scheduled Maint & Refueling Outage Concluded.Inservice Insp Revealed through-wall Cracks & Crack Indications on Welds in Recirculating Sys Piping. Repairs Made by Weld Overlay Method | Weld Overlay Hydrostatic |
| PNO-III-84-092, on 841104,explosion & Fire Occurred in Auxiliary Transformer.Caused by Internal Short Circuit. Essential Loads Picked Up by Standby Transformer.Hpci,Rcic & Transformer Deluge Sys Started | 5 November 1984 | PNO-III-84-092:on 841104,explosion & Fire Occurred in Auxiliary Transformer.Caused by Internal Short Circuit. Essential Loads Picked Up by Standby Transformer.Hpci,Rcic & Transformer Deluge Sys Started | |
| PNO-III-83-032, on 830426,scram Circuitry Failed to Operate Properly When Mode Switch Moved from Refuel Position to Shutdown Position.Caused by Three Loose Wires in Rectifier Bridge | 27 April 1983 | PNO-III-83-032:on 830426,scram Circuitry Failed to Operate Properly When Mode Switch Moved from Refuel Position to Shutdown Position.Caused by Three Loose Wires in Rectifier Bridge | |
| ML20249A028 | 13 December 1978 | PNS-78-060:on 781212,security Guard at Duane Arnold Energy Ctr Received Telcon from Male Caller Who Said, Listen & Listen Good.Plant Will Blow Up Tonight. No Search Instituted,But Security Personnel Deployed | |
| PNO-III-78-193, on 781109,received Allegation Re Qualification of Welders Performing Safe End Repair Work at Plant.State of IA Informed | 15 November 1978 | PNO-III-78-193:on 781109,received Allegation Re Qualification of Welders Performing Safe End Repair Work at Plant.State of IA Informed | |
| ML20248F220 | 30 June 1978 | PNO-78-129:on 780630,licensee Notified Region III That on 780603,contract Worker Collapsed While Working in Refueling Floor Area.Victim Taken to Hospital.Hospital Detected Minor Contamination on Individuals Cheek & Back | |
| ML20248F171 | 29 June 1978 | PNO-78-125A:on 780627,licensee Reported That Nondestructive Testing of Remiaining Seven Recirculation Sys Inlet Nozzle Transition Pieces Revealed That Five of Seven Have Crack Indications That Will Require Repair | Nondestructive Examination |
| ML20248F161 | 19 June 1978 | PNO-78-125:on 780617,licensee Notified Region III That 3 Long Crack Found in ten-inch Recirculation Sys Line.Crack Appears to Be in Inconel Transition Piece Between Pipe & Vessel Nozzle.State of Iowa Being Notified | |
| ML20248J788 | 27 March 1978 | PNO-78-062:on 780325,during Insp of Drywell,Pipe Crack Was Detected in Primary Coolant Sys four-inch Cleanup Line. Reactor Currently Shutdown for Refueling.Licensee Evaluating Methods for Repair.State of IA Notified | |
| ML20151U436 | 10 May 1977 | PNO-77-076:during Routine Tour of Plant,Radiation Technician Noticed Smoke Coming from 480V Motor Control Ctr.Small Fire Was Noted in Supply Breaker.Fire Was Extinguished.Plant Presently Shutdown for Refueling | |
| ML20151U684 | 31 March 1977 | PNO-77-050:on 770329,notified Region III of Failure of Four Six Automatic Relief Valves During Testing.Licensee Stated Manual Relief Fuction of Six Valves Satifactorily Tested at Site.Region III Following Matter Closely | |
| ML20249B869 | 4 November 1976 | PNO-76-181:during Conduct of Routine Monthly Diesel Generator Surveillance Test on 761104,fuel Oil Leak Developed Due to Cracked Fitting in Fuel Line.Fuel Oil Sprayed on Exhaust Manifold & Fire Ignited.Inspector Onsite | |
| ML20236F417 | 24 June 1976 | PNS-76-028:on 760623,secretary in General Ofc of Iowa Electric Light & Power Co Received Telephonic Bomb Threat.Search of Facility Was Conducted.No Bomb Was Found | |
| ML20236U893 | 4 September 1975 | PN-75-086:licensee Reported That Strike of Operating & Maint Bargaining Unit Personnel Would Take Place on 750904.Plant Will Be Operated by Site & Corporate Supervisory Personnel IAW Contingency Plan | |
| ML20236U174 | 11 June 1975 | PN-75-035:on 750610,Region III Ofc Was Notified by Licensee That Fuel Bundle Had Dropped Into Reactor Vessel During Fuel Movement Operation.Plans in Progress to Determine How to Secure Bundle,Positioned Upright & Leaning Against Wall |