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| Issue date | Title | Topic | |
|---|---|---|---|
| PNO-IV-98-025, on 980615,WNP-2 Initiated Plant Shutdown as Result of Traversing Incore Probe That Could Not Be Moved. Licensee Observed Some Drive Cable Damage & Cable Wrapped Around Some Components Under Reactor Vessel | 16 June 1998 | PNO-IV-98-025:on 980615,WNP-2 Initiated Plant Shutdown as Result of Traversing Incore Probe That Could Not Be Moved. Licensee Observed Some Drive Cable Damage & Cable Wrapped Around Some Components Under Reactor Vessel | |
| PNO-IV-95-007, on 950218,plant Reactor Scrammed from 80% Power Due to Turbine Trip.News Media Was Notified of Event | 21 February 1995 | PNO-IV-95-007:on 950218,plant Reactor Scrammed from 80% Power Due to Turbine Trip.News Media Was Notified of Event | |
| PNO-V-93-021, on 931201,chemical Spill in Radwaste Building. Caused by Addition of Oxidizing Agent,Hydrogen Peroxide. Employees Working on Floor Were Moved to Different Part of Plant | 2 December 1993 | PNO-V-93-021:on 931201,chemical Spill in Radwaste Building. Caused by Addition of Oxidizing Agent,Hydrogen Peroxide. Employees Working on Floor Were Moved to Different Part of Plant | |
| PNO-V-93-004, on 930121,automatic Reactor Scram Received Due to Low Level in Reactor Pressure Vessel.Licensee Estimates That Plant Will Be Shut Down for Repairs & Maint for 3 to 5 Days.Inspector Onsite During Event.Press Release Issued | 21 January 1993 | PNO-V-93-004:on 930121,automatic Reactor Scram Received Due to Low Level in Reactor Pressure Vessel.Licensee Estimates That Plant Will Be Shut Down for Repairs & Maint for 3 to 5 Days.Inspector Onsite During Event.Press Release Issued | Reactor Vessel Water Level |
| PNO-V-92-024, on 920711,while Retesting Main Steam SRV at Approx 14% Reactor Power,Srv 3B Opened When Operated from Control Room But Would Not Close.Reactor Operators Reduced Reactor Pressure in Effort to Reseat Valve | 13 July 1992 | PNO-V-92-024:on 920711,while Retesting Main Steam SRV at Approx 14% Reactor Power,Srv 3B Opened When Operated from Control Room But Would Not Close.Reactor Operators Reduced Reactor Pressure in Effort to Reseat Valve | |
| PNO-V-91-031, on 911119,licensee Declared Unusual Event Following Low Reactor Pressure Vessel Level Condition W/Eccs Injecting.Reactor Tripped on Turbine Trip.All ECCS Sys Responded as Designed | 19 November 1991 | PNO-V-91-031:on 911119,licensee Declared Unusual Event Following Low Reactor Pressure Vessel Level Condition W/Eccs Injecting.Reactor Tripped on Turbine Trip.All ECCS Sys Responded as Designed | |
| ML20203C223 | 14 June 1991 | PNO-V-91-04B on 910614,Region V Issued Rev 3 to CAL Concerning Actions to Be Taken by WPPSS Subsequent to Unsuccessful Simulator Requalification Retake Exam Performed 910605-06 | |
| PNO-V-90-049, on 901207,w/plant Operating at Full Power, Explosion Occurred in Area of B Phase Insulator of Plant Main Transformer,Which Caused Turbine & Reactor Trip.Unusual Event Was Declared Due to Explosion | 7 December 1990 | PNO-V-90-049:on 901207,w/plant Operating at Full Power, Explosion Occurred in Area of B Phase Insulator of Plant Main Transformer,Which Caused Turbine & Reactor Trip.Unusual Event Was Declared Due to Explosion | |
| PNO-V-90-041, on 901024,licensee Declared Unusual Event After Determining That Vital & non-vital Instrument Power Supplies Interconnected Through Certain Sys Instrumentation | 25 October 1990 | PNO-V-90-041:on 901024,licensee Declared Unusual Event After Determining That Vital & non-vital Instrument Power Supplies Interconnected Through Certain Sys Instrumentation | |
| PNO-IV-90-028, on 900603,while Attempting to Energize Station Normal Auxiliary Power Transformers,Short Circuit Failure in Bus Works for 25 Kv Sys.Fire Brigade Responded But No Fire Was Reported.Event Under Investigation | 4 June 1990 | PNO-IV-90-028:on 900603,while Attempting to Energize Station Normal Auxiliary Power Transformers,Short Circuit Failure in Bus Works for 25 Kv Sys.Fire Brigade Responded But No Fire Was Reported.Event Under Investigation | |
| PNO-V-88-054, on 880824,licensee Declared Unusual Event as Result of Increase in Unidentified Leakage to Level Above TS Limit of 5 Gpm.Reactor Was Later Shutdown & Unidentified Leakage Rate Had Correspondingly Decreased to Approx 8 Gpm | 24 August 1988 | PNO-V-88-054:on 880824,licensee Declared Unusual Event as Result of Increase in Unidentified Leakage to Level Above TS Limit of 5 Gpm.Reactor Was Later Shutdown & Unidentified Leakage Rate Had Correspondingly Decreased to Approx 8 Gpm | Grab sample |
| PNO-V-88-013, on 880213,plant Experienced Condenser Tube Failure & Shut Down Manually Scramming Plant from 35% Power. on 880214,reactor Bldg Air Supply Fan Started W/O Trip Circuit Being Energized.Cause Under Investigation | 16 February 1988 | PNO-V-88-013:on 880213,plant Experienced Condenser Tube Failure & Shut Down Manually Scramming Plant from 35% Power. on 880214,reactor Bldg Air Supply Fan Started W/O Trip Circuit Being Energized.Cause Under Investigation | |
| PNO-V-87-079, on 871126,digital Voltmeter Connected to Wrong Terminal Resulting in Inadvertent Opening of Safety Relief Valve 2D.Caused by Technician Error.Position of Safety Relief Valve Identified & Shut | 27 November 1987 | PNO-V-87-079:on 871126,digital Voltmeter Connected to Wrong Terminal Resulting in Inadvertent Opening of Safety Relief Valve 2D.Caused by Technician Error.Position of Safety Relief Valve Identified & Shut | Reactor Vessel Water Level |
| ML20236G379 | 26 October 1987 | PNS-V-87-008:on 871024,licensed Plant Operator Reportedly Arrested by Kennewick City Police Dept & Charged W/Discharge of Firearm within City Limits & Reckless Endangerment. Licensee Suspended Employee Unescorted Access to Plant | |
| PNO-V-87-024A, on 870322,reactor Manually Tripped Due to Loss of Feedwater.Caused by Mechanical Failure of 1/4-amp Fuse in Feedwater Control Sys.Rcic Sys Operated Properly.Plant Restarted on 870324 | 25 March 1987 | PNO-V-87-024A:on 870322,reactor Manually Tripped Due to Loss of Feedwater.Caused by Mechanical Failure of 1/4-amp Fuse in Feedwater Control Sys.Rcic Sys Operated Properly.Plant Restarted on 870324 | |
| PNO-V-87-024, on 870322,both Main Feedwater Pumps Lost Suction Pressure & Tripped.Plant Operator Manually Tripped Reactor Upon Losing All Feedwater Flow.Reactor Vessel Level Restored & Heat Manually Removed.Investigation Pending | 23 March 1987 | PNO-V-87-024:on 870322,both Main Feedwater Pumps Lost Suction Pressure & Tripped.Plant Operator Manually Tripped Reactor Upon Losing All Feedwater Flow.Reactor Vessel Level Restored & Heat Manually Removed.Investigation Pending | |
| PNO-V-87-022, on 870319,licensee Found Pressure Switch on Discharge Side of RHR Sys Pump B Isolated.Licensee Unisolated Switch & Restored Sys to Full Operability.Region V Followup Continuing | 20 March 1987 | PNO-V-87-022:on 870319,licensee Found Pressure Switch on Discharge Side of RHR Sys Pump B Isolated.Licensee Unisolated Switch & Restored Sys to Full Operability.Region V Followup Continuing | |
| PNO-V-87-015, on 870220,shutdown Commenced Due to Decreasing Lubrication Oil Pressure to Turbine Bearings.Caused by Flange or Pipe Leak Inside Lube Oil Reservoir.Shutdown Will Continue for Approx 4 to 6 Days | 20 February 1987 | PNO-V-87-015:on 870220,shutdown Commenced Due to Decreasing Lubrication Oil Pressure to Turbine Bearings.Caused by Flange or Pipe Leak Inside Lube Oil Reservoir.Shutdown Will Continue for Approx 4 to 6 Days | |
| PNO-V-86-084, on 861120,plant Shut Down Due to Inoperability of Acoustic Monitor for Safety Relief Valve 5c.Caused by Lack of Environ Qualification Documentation for Connector. Investigation Underway.Plant Will Be Restarted on 861125 | 20 November 1986 | PNO-V-86-084:on 861120,plant Shut Down Due to Inoperability of Acoustic Monitor for Safety Relief Valve 5c.Caused by Lack of Environ Qualification Documentation for Connector. Investigation Underway.Plant Will Be Restarted on 861125 | |
| PNO-V-86-078, on 861107 & 09 Increased Vibration from Reactor Recirculating Water Pump a Occurred.Licensee Reduced Reactor Power & Shifted Pumps Into Low Frequency Operation, Decreasing Vibration Level | 12 November 1986 | PNO-V-86-078:on 861107 & 09 Increased Vibration from Reactor Recirculating Water Pump a Occurred.Licensee Reduced Reactor Power & Shifted Pumps Into Low Frequency Operation, Decreasing Vibration Level | |
| PNO-V-86-064, on 860918,licensee Declared Unusual Event Due to High Winds of 85 Mph.Svc Water Pump B out-of-svc Resulting in Emergency Diesel Generator B Being out-of-svc. Rupture in Low Pressure Fire Main Also Reported | 18 September 1986 | PNO-V-86-064:on 860918,licensee Declared Unusual Event Due to High Winds of 85 Mph.Svc Water Pump B out-of-svc Resulting in Emergency Diesel Generator B Being out-of-svc. Rupture in Low Pressure Fire Main Also Reported | High winds |
| PNO-V-86-064A, on 860918,licensee Declared Alert Due to Tornado Warnings & High Winds.Train a Svc Water Sys out-of- Svc Due to Fire in Svc Water Pump House.Licensee Also Experiencing Low Fire Main Header Pressure | 18 September 1986 | PNO-V-86-064A:on 860918,licensee Declared Alert Due to Tornado Warnings & High Winds.Train a Svc Water Sys out-of- Svc Due to Fire in Svc Water Pump House.Licensee Also Experiencing Low Fire Main Header Pressure | High winds |
| PNO-V-86-060, on 860903,reactor Feedwater Pump B Tripped Due to Failure of Overspeed Controls.Caused by Partial Control Valve Closure Re Tripping of Hydraulic Power Units. Investigation Underway | 4 September 1986 | PNO-V-86-060:on 860903,reactor Feedwater Pump B Tripped Due to Failure of Overspeed Controls.Caused by Partial Control Valve Closure Re Tripping of Hydraulic Power Units. Investigation Underway | |
| PNO-V-86-034, on 860620,licensee Measured 1.3 Gpm Leakage Into RHR Sys B.Caused by Leak Through LPCI Injection Valve 53B.Util Repairing Valve.Startup Will Be Delayed Until 860629 Due to BPA Load Requirements | 23 June 1986 | PNO-V-86-034:on 860620,licensee Measured 1.3 Gpm Leakage Into RHR Sys B.Caused by Leak Through LPCI Injection Valve 53B.Util Repairing Valve.Startup Will Be Delayed Until 860629 Due to BPA Load Requirements | |
| PNO-V-86-031, on 860609,operation Resumed After Completing First Refueling Outage.Licensee Plans to Complete post-refueling Startup Testing & Fuel Preconditioning. Facility May Be Placed in Reserve Shutdown Status | 11 June 1986 | PNO-V-86-031:on 860609,operation Resumed After Completing First Refueling Outage.Licensee Plans to Complete post-refueling Startup Testing & Fuel Preconditioning. Facility May Be Placed in Reserve Shutdown Status | |
| PNO-V-85-077, on 851113,blown Fuse in Water Level Control Sys Resulted in Reactor Feedpumps Overfeeding & Reactor Trip.Caused by Faulty Inverter.Facility Shut Down to Allow Installation of Instrumentation to Monitor Vibrations | 13 November 1985 | PNO-V-85-077:on 851113,blown Fuse in Water Level Control Sys Resulted in Reactor Feedpumps Overfeeding & Reactor Trip.Caused by Faulty Inverter.Facility Shut Down to Allow Installation of Instrumentation to Monitor Vibrations | Reactor Vessel Water Level |