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
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| ML20198K395 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 12/07/1990 |
| From: | Richards S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| References | |
| PNO-V-90-049, PNO-V-90-49, NUDOCS 9710240011 | |
| Download: ML20198K395 (1) | |
Similar Documents at Columbia | |
|---|---|
Category:PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO
MONTHYEARPNO-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 Vessel1998-06-16016 June 1998
[Table view]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 Event1995-02-21021 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 Plant1993-12-0202 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 Issued1993-01-21021 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 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 Valve1992-07-13013 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 Designed1991-11-19019 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 ML20203C2231991-06-14014 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 Explosion1990-12-0707 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 Instrumentation1990-10-25025 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 Investigation1990-06-0404 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 Gpm1988-08-24024 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 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 Investigation1988-02-16016 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 & Shut1987-11-27027 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 ML20236G3791987-10-26026 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 8703241987-03-25025 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 Pending1987-03-23023 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 Continuing1987-03-20020 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 Days1987-02-20020 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 8611251986-11-20020 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 Level1986-11-12012 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 Reported1986-09-18018 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 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 Pressure1986-09-18018 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 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 Underway1986-09-0404 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 Requirements1986-06-23023 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 Status1986-06-11011 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 Vibrations1985-11-13013 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 1998-06-16 Category:TEXT-INSPECTION & AUDIT & I&E CIRCULARS MONTHYEARIR 05000397/19990011999-03-19019 March 1999
[Table view]Insp Rept 50-397/99-01 on 990201-04 & 0303-05.No Violations Noted.Major Areas Inspected:Physical Security Program ML20154H7501998-10-13013 October 1998 Revised Notice of Violation from Insp on 971118.Violation Noted:In April 1996,licensee Made Changes to Procedures as Described in Safety Analysis Rept Without Seeking Prior Commission Approval & Changes Had Effect of Changing TS 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 Vessel1998-06-16016 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 ML20199E3161997-11-18018 November 1997 Notice of Violation from Insp on 971020-26.Violation Noted: on 971021,inspector Identified Gap in Vehicle Barrier Sys That Provided Path for Design Basis Vehicle to Gain Access to Unauthorized Proximity to Vital Area IR 05000397/19970071997-11-18018 November 1997 Partially Withheld Insp Rept 50-397/97-07 on 971020-26. (Ref 10CFR73.21).Violations Noted.Major Areas Inspected: Plant Support Re Vehicle Barrier Sys Which Was Consistent W/Summary Description & Accurately in Security Plan IR 05000397/19970061997-06-0909 June 1997 Insp Rept 50-397/97-06 on 970519-23.No Violations Noted. Major Areas Inspected:Insp Consisted of Review of Licensee Planned & Implemented Activities Associated W/Isi Program IR 05000397/19970021997-03-0606 March 1997 Insp Rept 50-397/97-02 on 970127-31 & 0212-14.No Violations Noted.Major Areas Inspected:Engineering & Plant Support Security IR 05000397/19960231996-12-16016 December 1996 Insp Rept 50-397/96-23 on 961118-22.No Violations Noted. Major Areas Inspected:Engineering & Plant Support ML20134Q0381996-11-21021 November 1996 EN-96-084:on 961126,notice of Proposed Imposition of Civil Penalty in Amount of $100,000 Issued to Licensee.Action Based on Several Instances Where Surveillances Not Performed & Mode Changes Made W/O Assurances That Equipment Operable PNO-IV-95-007, on 950218,plant Reactor Scrammed from 80% Power Due to Turbine Trip.News Media Was Notified of Event1995-02-21021 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 Plant1993-12-0202 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 ML20059D2141993-10-15015 October 1993 Notice of Violation from Insp on 930402-0517.Violation Noted:Licensee Determined That Records Required to Be Maintained by NRC Not Complete & Accurate in All Matl Respects IR 05000397/19930281993-08-26026 August 1993 Insp Rept 50-397/93-28 on 930809-13.No Violations Noted. Major Areas Inspected:Emergency Preparedness Program, Emergency Detection & Classification,Notification & Communication 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 Issued1993-01-21021 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 IR 05000397/19920341992-12-30030 December 1992 Insp Rept 50-397/92-34 on 921207-11.No Violations Noted. Major Areas Inspected:Emergency Preparedness Program 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 Valve1992-07-13013 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 Designed1991-11-19019 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 ML20203C2231991-06-14014 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 Explosion1990-12-0707 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 Instrumentation1990-10-25025 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 Investigation1990-06-0404 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 Gpm1988-08-24024 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 IR 05000397/19880221988-06-29029 June 1988 Insp Rept 50-397/88-22 on 880606-09.Violation Noted.Major Areas inspected:880512 Radioactive Resins Spill in Radwaste Bldg Which Resulted in Declaration of Unusual Event & Facility Tour ML20150F9771988-06-29029 June 1988 Notice of Violation from Insp on 880606-09.Violation Noted: on 880512,individual Entered Radwaste Bldg W/O Being Accompanied or Provided W/Radiation Monitoring Device & on 880608,door to Radwaste Bldg Not Locked 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 Investigation1988-02-16016 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 IR 07100001/20110051987-12-0404 December 1987 Notice of Violation from Insp on 871001-1105.Violation Noted:Maint Electrician Worked More than 24 H in 48 H Period & Plant Operations Committee Meeting Held W/Chairman & Three Rather than Four Members as Required IR 05000397/19870271987-12-0303 December 1987 Insp Rept 50-397/87-27 on 871001-1105.Violations Noted.Major Areas Inspected:Control Room Operations,Esf Status, Surveillance & Maint Programs,Lers,Special Insp Topics & Licensee Action on Previous Insp Findings 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 & Shut1987-11-27027 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 ML20236T8241987-10-30030 October 1987 Exam Rept 50-397/OL-87-03 on 870922-30.Exam Results:Four Out of Six Reactor Operator Candidates & Eight Out of Eleven Senior Reactor Operator Candidates Passed Exams.Sample Test & Other Supporting Info Encl ML20236G3791987-10-26026 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 8703241987-03-25025 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 Pending1987-03-23023 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 ML20205G6601987-03-20020 March 1987 Exam Rept 50-397/OL-87-02.Requalification Program Evaluated as Satisfactory,Per Rev 0 to NUREG-1021 & WT Russell 860522 Memo Re Listed Requirements 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 Continuing1987-03-20020 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 IR 05000397/19870031987-03-18018 March 1987 Insp Rept 50-397/87-03 on 870223-27.No Violations Noted. Major Areas Inspected:Calibr of Instrumentation,Ie Bulletin Followup,Licensee Action on Previous Insp Findings,Licensee Action on Items of Noncompliance & Part 21 Followup IR 05000397/19870011987-03-0303 March 1987 Insp Rept 50-397/87-01 on 870104-0214.No Violations or Deviations Identified.Major Areas Inspected:Control Room Operations,Esf Status,Surveillance Programs,Maint Topics, Lers,Special Insp Topics & Listed Insp Procedures 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 Days1987-02-20020 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 IR 05000397/19860371987-01-16016 January 1987 Insp Rept 50-397/86-37 on 861116-870103.No Violations or Deviations Identified.Major Areas Inspected:Esf Status.Lers, Surveillance Program,Maint Program,Special Insp Topics & Licensee Action on Previous Insp Findings IR 05000397/19860381987-01-0707 January 1987 Insp Rept 50-397/86-38 on 861124-26 & 1215-19.No Violations Noted.Major Areas Inspected:Gaseous Waste Sys,Liquids & Liquid Wastes,Facilities & Equipment,Followup on IE Info Notices & Enforcement Items 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 8611251986-11-20020 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 IR 05000397/19860261986-11-19019 November 1986 Insp Rept 50-397/86-26 on 860915-20.No Violations Noted. Major Areas Inspected:Emergency Preparedness Exercise & Associated Critique & Followup on Open Items Identified During Previous Insps 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 Level1986-11-12012 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-86-064A, 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 Pressure1986-09-18018 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 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 Reported1986-09-18018 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 ML20206U1861986-09-18018 September 1986 Notice of Violation from Insp on 860616-27 IR 05000397/19860311986-09-17017 September 1986 Enforcement Conference Rept 50-397/86-31.Topics Discussed: Violations Identified in Insp Rept 50-397/86-12 Re Equipment Qualification Program,Violations in Insp Rept 50-397/86-11 & Repeat Violations in Control of Combustible Matls ML20206U7381986-09-17017 September 1986 Exam Rept 50-397/OL-86-02 on 860811-14.Exam Results:One Senior Reactor Operator Candidate Failed Simulator Portion & One Senior Reactor Operator Candidate Failed Oral & Simulator Portions of Exam.Eight Candidates Passed 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 Underway1986-09-0404 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 IR 05000397/19860111986-07-25025 July 1986 Insp Rept 50-397/86-11 on 860616-27.Violations Noted.Major Areas Inspected:Mgt Controls & Licensee Activities,Including Operator Recovery Actions,Qa Program,Measuring & Test Equipment & Tech Spec Surveillances & Tests 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 Requirements1986-06-23023 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 1999-03-19 |
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DEC-10-'90 mot 4 09:05 ID:tt4BB 3306 3314927142 TEL N0:301-492-7142 M370 P02 f) st.< < e Cnq f(jr1 j a J .ib !
MINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PHO-V-90-49 Date 12/07/90 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by Region V staff on this date.
FACILITY: WASHINGTON PUBLIC POWER SUPPLY SYSTEM Emergency Classification WNP-2 XX Notification of Unusual Event DOCKET NO. 50-397 Alert RICHLAND, WASHINGTON Site Area toergency General Emer0ency Not Applicable
SUBJECT:
TRANSFORMER EXPLOSION AND REACTOR TRIP At app mximately 10:10 a.m. (PST) on December 7, 1990, with the plant operating at full power, an explosion occurred in the area of the 'B' phase insulator of the plant's main transformer. This caused a turbine trip and a reactor trip. The reactor was stabilized in Mode 3. At 10:19 a.m. (PST), the licensee declared an unusual Event due to the explosion.
Th re was no fire and the Unusual Event was terminated at 11:00 a.m. (PST).
The availability of offsite power was not affected by the event. An inspection conducted of transformers associated with offsite power indicated that the explosion did not impact th3ce transformers. Preliminary indications are that during the reactor trip, one safety The licensee presently
[ 711ef valve lends liftedthe to take forplant about to10 seconds cold andpending shutdown then fully resented.
their review of the event and repair of V transformer.
This information is current as of 11:45 a.m. (PST), December 7,1990.
CONTACT: S. Richards FTS 463-3063 , h [ p(W
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DISTRTBUTION BY 5520: FAX TO: E tO Date_12/07/90 Time 1:15 pm Date Time C~
Ch:1rman Carr EDO RI INPO a Comm. Roberts AE00 RII NSAC 8 Comm. Rogers PA0 RIII LICENSEE -
C Comm. Curtiss SLITP RIV RESIDENT INSPECTOR comm. Remick NRR HQS. OPEP.ATIONS OFFICER -
-c OCA NMSS POR N OGC IRM MAIL TO: F-C" OE OIG [ICS (Original) j ACRS ASLAP DOT:(Trans. Only, Applicable State)
GPA RES RV FORM 211 Revised: 8/19/87 A
l i 9710240011 901207 l PDR 18cE PNO-V-90-049 PDR l