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| Issue date | Title | Topic | |
|---|---|---|---|
| PNO-II-97-065, on 971228,initiated Controlled Shutdown of Unit Due to Exceeding TS Leakage Limit of 150 Gpd.Licensee Continuing W/Plant Depressurization & Cooldown & Outage Planned of Several Days to Investigate & Repair SG | 29 December 1997 | PNO-II-97-065:on 971228,initiated Controlled Shutdown of Unit Due to Exceeding TS Leakage Limit of 150 Gpd.Licensee Continuing W/Plant Depressurization & Cooldown & Outage Planned of Several Days to Investigate & Repair SG | |
| PNO-II-97-034, on 970613,extended Shutdown to Meet CAL 2-97-03 Commitments to Shutdown Unit 1 No Later than 970614 & to Implement Actions Re HPI Sys.Nrc Resident Inspector Will Followup on Unit 1 Shutdown & Recovery Activities | 13 June 1997 | PNO-II-97-034:on 970613,extended Shutdown to Meet CAL 2-97-03 Commitments to Shutdown Unit 1 No Later than 970614 & to Implement Actions Re HPI Sys.Nrc Resident Inspector Will Followup on Unit 1 Shutdown & Recovery Activities | |
| PNO-II-93-039, on 930823,reactor Trip Occurred Due to Loss of Power to Vital Panelboard.Investigation Team Dispatched to Site to Review Root Cause & Plant Response.State & Local Authorities Notified | 24 August 1993 | PNO-II-93-039:on 930823,reactor Trip Occurred Due to Loss of Power to Vital Panelboard.Investigation Team Dispatched to Site to Review Root Cause & Plant Response.State & Local Authorities Notified | |
| PNO-II-92-070, on 921019,several Circuit Breakers Failed in 230KV Switchyard to Open Position for Unknown Reasons. Licensee Has Inititated Investigation to Review Event to Determine Cause & Determine Why Certain Equipment Failed | 20 October 1992 | PNO-II-92-070:on 921019,several Circuit Breakers Failed in 230KV Switchyard to Open Position for Unknown Reasons. Licensee Has Inititated Investigation to Review Event to Determine Cause & Determine Why Certain Equipment Failed | |
| PNO-II-91-074B, on 911123,unit Remained in Cold Shutdown,Per Declaration of Alert at 0214 Due to Leak in Rcs.As of 911126,total of 7,800 Gallons of Treated Water Released from Plant to Lake Hartwell | 26 November 1991 | PNO-II-91-074B:on 911123,unit Remained in Cold Shutdown,Per Declaration of Alert at 0214 Due to Leak in Rcs.As of 911126,total of 7,800 Gallons of Treated Water Released from Plant to Lake Hartwell | |
| PNO-II-90-070, on 901108,unit Commenced Controlled Shutdown from 60% Power Due to Tube Leak in Steam Generator a | 8 November 1990 | PNO-II-90-070:on 901108,unit Commenced Controlled Shutdown from 60% Power Due to Tube Leak in Steam Generator a | |
| PNO-II-88-013, on 880211,two Workers Slightly Contaminated W/ Radioactive Water.Caused by Approx 1,000 Gallon Leak of Radioactive Water Occurring During Maint on Valve.Workers Showered to Remove Contamination | 12 February 1988 | PNO-II-88-013:on 880211,two Workers Slightly Contaminated W/ Radioactive Water.Caused by Approx 1,000 Gallon Leak of Radioactive Water Occurring During Maint on Valve.Workers Showered to Remove Contamination | |
| PNO-II-86-092, on 861218,licensee Shut Down Unit to Begin Scheduled Refueling Outage 6 Wks Early.Caused by Excessive Vibrations in Reactor Coolant Pump 3B2.During Outage,Reactor Coolant Pumps 3B1,3B2 & 3A1 Will Be Modified | 18 December 1986 | PNO-II-86-092:on 861218,licensee Shut Down Unit to Begin Scheduled Refueling Outage 6 Wks Early.Caused by Excessive Vibrations in Reactor Coolant Pump 3B2.During Outage,Reactor Coolant Pumps 3B1,3B2 & 3A1 Will Be Modified | |
| PNO-II-86-078, on 861021,2 Gallons of Hydrazine Spilled in Turbine Bldg.Caused by Leak in Deionized Water Mixing Valve Overflowing Mix Tank.Spill Cleaned Up | 22 October 1986 | PNO-II-86-078:on 861021,2 Gallons of Hydrazine Spilled in Turbine Bldg.Caused by Leak in Deionized Water Mixing Valve Overflowing Mix Tank.Spill Cleaned Up | |
| PNO-II-86-069, on 861002,Units 1 & 2 Shut Down Due to Loss of Low Pressure Svc Water Pump Suction After Surveillance Test. Caused by Air Leakage in Pump Flange Seals.Leakage Areas Wrapped.All Units Shutdown Until Exact Cause Determined | 3 October 1986 | PNO-II-86-069:on 861002,Units 1 & 2 Shut Down Due to Loss of Low Pressure Svc Water Pump Suction After Surveillance Test. Caused by Air Leakage in Pump Flange Seals.Leakage Areas Wrapped.All Units Shutdown Until Exact Cause Determined | Ultimate heat sink |
| PNO-II-86-055, on 860806,plant Began Shutdown Due to Leak in Steam Generator a Tube Calculated at 0.26 Gallons Per Minute.Shutdown Expected to Last 10 Days | 7 August 1986 | PNO-II-86-055:on 860806,plant Began Shutdown Due to Leak in Steam Generator a Tube Calculated at 0.26 Gallons Per Minute.Shutdown Expected to Last 10 Days | |
| PNO-II-86-036, on 860515,during Power Escalation Tests at 100% Power,Steam Generator Tube Leak Detected.Unit Out of Svc for 10 Days to Repair Leak | 19 May 1986 | PNO-II-86-036:on 860515,during Power Escalation Tests at 100% Power,Steam Generator Tube Leak Detected.Unit Out of Svc for 10 Days to Repair Leak | |
| PNO-II-86-014, on 860213,mild Earthquake Felt at Site.Plant Turbine & Auxiliary Bldgs Surveyed & No Damage Found. Preliminary Review of Detection Equipment at Site Indicated No Evidence of Ground Movement or Tremor | 13 February 1986 | PNO-II-86-014:on 860213,mild Earthquake Felt at Site.Plant Turbine & Auxiliary Bldgs Surveyed & No Damage Found. Preliminary Review of Detection Equipment at Site Indicated No Evidence of Ground Movement or Tremor | Earthquake |
| PNO-II-85-111, on 851124,unscheduled Shutdown Greater than 48 H Anticipated.Caused by Failure of High Pressure Turbine Bearing.Outage of at Least 8 Days Expected for Evaluation & Repairs | 25 November 1985 | PNO-II-85-111:on 851124,unscheduled Shutdown Greater than 48 H Anticipated.Caused by Failure of High Pressure Turbine Bearing.Outage of at Least 8 Days Expected for Evaluation & Repairs | |
| PNO-II-85-107, on 851107,plant Taken out-of-svc After Verification of Turbine High Bearing Temp.Caused by Main Turbine Bearing Failure.Plant Expected to Be Shut Down for 5 to 14 Days for Repairs | 7 November 1985 | PNO-II-85-107:on 851107,plant Taken out-of-svc After Verification of Turbine High Bearing Temp.Caused by Main Turbine Bearing Failure.Plant Expected to Be Shut Down for 5 to 14 Days for Repairs | |
| PNO-II-85-094, on 851007,unit Shut Down Due to Steam Generator Tube Leak.Leakage Amounted to 0.15 Gallon Per Minute & Increasing.Generator Isolated.Shutdown Expected for 10-12 Days | 8 October 1985 | PNO-II-85-094:on 851007,unit Shut Down Due to Steam Generator Tube Leak.Leakage Amounted to 0.15 Gallon Per Minute & Increasing.Generator Isolated.Shutdown Expected for 10-12 Days | |
| PNO-II-85-068, on 850721,two Threatening Telecons Received by Switchboard & Another Call Received on Telephone Answering Machine in Ofc of NRC Resident Inspector.Security Contingency Plan Implemented & Agencies Informed | 22 July 1985 | PNO-II-85-068:on 850721,two Threatening Telecons Received by Switchboard & Another Call Received on Telephone Answering Machine in Ofc of NRC Resident Inspector.Security Contingency Plan Implemented & Agencies Informed | |
| PNO-II-85-065, on 850708,routine Receipt Survey Identified Four Smears on Exterior of Empty NAC-1 Fuel Shipping Cask from Nuclear Assurance Corp in Excess of Max Permissible Limits.Measured Levels Posed No Threat to Public Safety | 9 July 1985 | PNO-II-85-065:on 850708,routine Receipt Survey Identified Four Smears on Exterior of Empty NAC-1 Fuel Shipping Cask from Nuclear Assurance Corp in Excess of Max Permissible Limits.Measured Levels Posed No Threat to Public Safety | Exclusive Use |
| PNO-II-85-058, on 850607,licensee Reported That Individual Received Radiation Overdose to Small Area of Skin on Underarm.Caused by Particle Transfer from Protective Clothing.Person Decontaminated | 7 June 1985 | PNO-II-85-058:on 850607,licensee Reported That Individual Received Radiation Overdose to Small Area of Skin on Underarm.Caused by Particle Transfer from Protective Clothing.Person Decontaminated | Overdose |
| PNO-II-85-043, on 850425,most Control Room Annunciators Lost Due to Failure of Inverter Power Supply.Possibly Caused by Blown Fuse.One Feedwater Pump Restored to Operation | 25 April 1985 | PNO-II-85-043:on 850425,most Control Room Annunciators Lost Due to Failure of Inverter Power Supply.Possibly Caused by Blown Fuse.One Feedwater Pump Restored to Operation | |
| ML20054L521 | 29 June 1982 | Updated PNO-II-82-072A:on 820628,break Occurred in Outside Radius of Elbow 24-inch Line Which Branches Off 42-inch High Pressure Turbine Exhaust.Apparently Caused by Thinning from Steam Erosion | |
| PNO-II-82-072, on 820628,at 95% Power,High Pressure Turbine Extraction Steam Line Break Resulted in Release of Steam to Turbine Bldg Basement.Three Workers Reported Injured by Steam.Reactor Manually Shut Down & Placed in Hot Standby | 28 June 1982 | PNO-II-82-072:on 820628,at 95% Power,High Pressure Turbine Extraction Steam Line Break Resulted in Release of Steam to Turbine Bldg Basement.Three Workers Reported Injured by Steam.Reactor Manually Shut Down & Placed in Hot Standby | |
| PNO-II-82-065, visual & Ultrasonic Exams Revealed Cracks in 51 of 96 Thermal Shield Bolts.Removal of Bolts & Associated Locking Clips Revealed 19 of 27 Bolt Heads Broken.Bolts Will Be Replaced W/Stud & Nut Assemblies | 11 June 1982 | PNO-II-82-065:visual & Ultrasonic Exams Revealed Cracks in 51 of 96 Thermal Shield Bolts.Removal of Bolts & Associated Locking Clips Revealed 19 of 27 Bolt Heads Broken.Bolts Will Be Replaced W/Stud & Nut Assemblies | |
| PNO-II-81-002, on 810107,two of Three Individuals Found to Have Nasal Contamination (3200 Dpm Max) Following Maint on Control Rod Drive Mechanisms in Reactor Bldg.Workers Nostrils Decontaminated.Whole Body Counts Performed | 7 January 1981 | PNO-II-81-002:on 810107,two of Three Individuals Found to Have Nasal Contamination (3200 Dpm Max) Following Maint on Control Rod Drive Mechanisms in Reactor Bldg.Workers Nostrils Decontaminated.Whole Body Counts Performed | |
| PNO-II-80-150, on 801013,during Routine Check of Unit 2 Containment Purge Valve 5,purge Path Opened to Environ for 46 S.Caused by Failure to Follow Procedures in Proper Sequence.No Tech Spec Limits Exceeded.State of Sc Informed | 14 October 1980 | PNO-II-80-150:on 801013,during Routine Check of Unit 2 Containment Purge Valve 5,purge Path Opened to Environ for 46 S.Caused by Failure to Follow Procedures in Proper Sequence.No Tech Spec Limits Exceeded.State of Sc Informed | |
| ML20249A205 | 8 November 1978 | PNS-78-054:on 781106,NRC Region II Received Telephone Call from Security Guard Re Security Guard Training at Oconee.On 781107,NRC Investigators Met W/Group of Former & Present Guards Who Alleged Inadequate Training.Media Informed | |
| ML20216J588 | 4 August 1978 | PNO-78-141:on 780804,licensee Reported That Chemical Anaylsis of Reactor Vessel Weld Matl Performed by B&W Revealed That Silicon & Nickel Content Differed from That Specified | |
| ML20216J607 | 4 August 1978 | PNO-78-140:on 780803,employee at Plant Passed Out from Heat Exhaustion After Exiting Unit 1 Containment.Worker Was Treated,Released & Returned to Work Later That Day.No Injury Due to Radiation or Radioactive Contamination Occurred | |
| ML20248H861 | 5 May 1978 | PNO-78-102:on 780504,while RCS Was Open to Atmosphere, 50,000 Gallons of Reactor Coolant Overflowed Onto Containment Building Floor.Licensee Reported No Release of Radioactivity.State of South Carolina Notified | |
| ML20248H611 | 24 April 1978 | PN0-78-090:on 980421,Unit 1 Shutdown Commenced Due to SG Tube Leak.Unit 1 Will Be Placed in Cold Shutdown Condition, Portion of RCS Drained & SG Leak Tested to Identify Leaking Tubes for Repair.Estimated Duration of 2 Weeks for Shutdown | |
| ML20248L029 | 20 April 1978 | PNO-78-079B:supplements PNO 78-79A Dtd 780414.Informs That Addl Analyses Being Conducted by B&W.Licensee Reported That Operators Have Been Stationed at HPI Crossover Piping to Promptly Realign Sys for 2 Flow Paths Upon Break Detection | |
| ML20248K984 | 14 April 1978 | PNO-78-079A:supplements & Corrects Preliminary Info Provided in PNO-78-79 .Reanalysis Assumed Pipe Break of .04 Square Feet in RCP Discharge Piping.Region II Received Updated Info on 980413 & State of South Carolina Notified | |
| ML20248K009 | 13 April 1978 | PNO-78-079:licensee Reported That B&W Identified Error in Safety Analysis for Small Break in Rcs.Original Safety Analysis Was Done W/Small Break Occurring on Pump Discharge Line.State of Sc Notified | |
| ML20207G418 | 5 December 1977 | PNO-77-217:on 771205,following Refueling of Unit 3 & During Startup Physics Testing of Reloaded Core on 771204,core Power Distribution Measurements Revealed Seven Percent Flux Tilt at twenty-five Percent Power | |
| ML20207G813 | 4 November 1977 | PNO-77-193:on 771103,due to an Apparent SG Tube Leak of Approx 1.0 Gallon Per Minute (Gpm) Unit Was Shutdown | |
| ML20207G635 | 25 October 1977 | PNO-77-189:on 771016,following Refueling of Unit 1 & During Startup Physics Testing of Reloaded Core,Measured Values for Ejected Rod Worth Showed an Unexpected Reduction from Predicted Values | |
| ML20151X708 | 11 October 1977 | PNO-77-178:on 771007,unit Shutdown Commenced Due to SG Tube Leak of Approx 0.2 Gpm.Unit to Be Placed in Cold Shutdown for Approx 2 Wks While Repairs Conducted.Press & State of Sc Notified | |
| ML20151X415 | 1 September 1977 | PNO-77-152:film Badge Dosimeters Provided & Used by Five Contract Workers from Todd Shipyards,Galveston,Tx at Oconee Nuclear Station Indicated High Exposures Ranging from 1.3 Rems to 55 Rems | |
| ML20151Y163 | 15 July 1977 | PNO-77-129:on 770714,Unit Shutdown Was Commenced Due to Apparent SG Tube Leak.Unit Will Be Placed in Cold Shutdown Condition,Portion of RCS Will Be Drained & SG Will Be Leak Tested to Identify Leaking Tubes for Repair | |
| ML20151V205 | 12 May 1977 | PNO-77-083:on 770511,unplanned Release of Radioactivity in Liquid Occurred.Plant Personnel Investigating to Determine Cause.Monitoring of Turbine Bldg Sump & Yard Drainage Sys Continuing | |
| ML20236K934 | 2 February 1977 | PNO-77-019:on 770117,during SG Repair Activities,About 8,000 Gallons of Secondary Sys Water Was Inadvertently Released to Turbine Building Sumps | |
| ML20236X037 | 23 December 1975 | PN-75-155:on 751223,licensee Called Region II to Rept That Telephone Call Received from Man in Spartanburg,Sc Re Bomb Placed in Plant | |
| ML20236U225 | 13 June 1975 | PN-75-036:on 750613,DPC Notified Region II That Following Turbine Trip,Primary Sys Pressure Increased Where Primary Sys Electromatic Rv Opened to Reduce Pressure.Rv Stuck in Open Position & Pressure Reduced in 30 Minutes |