PNO-IV-88-024, on 880330,reactor Trip & Safety Injection Occurred Due to Loss of Offsite Power.Caused by Troubleshooting Work on Main Generator Control Circuits to Determine Cause of Main Generator Output Breaker Trip
From kanterella
Jump to navigation
Jump to search
| ML20150F028 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/31/1988 |
| From: | Constable G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| References | |
| PNO-IV-88-024, PNO-IV-88-24, NUDOCS 8804040240 | |
| Download: ML20150F028 (2) | |
Similar Documents at South Texas | |
|---|---|
Category:PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO
MONTHYEARPNO-IV-99-037, on 990822,Region IV Dispatched Inspector to STP to Relieve Resident Inspectors & to Provide Assistance to STP Nuclear Operating Co,In Anticipation of Hurricane Bret.Representative Was Also Dispatched to FEMA Region VI1999-08-23023 August 1999
[Table view]PNO-IV-99-037:on 990822,Region IV Dispatched Inspector to STP to Relieve Resident Inspectors & to Provide Assistance to STP Nuclear Operating Co,In Anticipation of Hurricane Bret.Representative Was Also Dispatched to FEMA Region VI PNO-IV-97-054, on 971006,premature Lifting of Main Turbine Moisture Separator Reheater Relief Valve Occurred.Licensee Removed Main Turbine Generator from Svc to Repair Relief Valve.Individual Transported Offsite Via Site Ambulance1997-10-0606 October 1997 PNO-IV-97-054:on 971006,premature Lifting of Main Turbine Moisture Separator Reheater Relief Valve Occurred.Licensee Removed Main Turbine Generator from Svc to Repair Relief Valve.Individual Transported Offsite Via Site Ambulance PNO-IV-97-012, on 970222,licensee Transported Potentially Contaminated Individual to Matagorda General Hosp.Individual Received Laceration on Forehead & Another at Lips.State of Tx Will Be Informed1997-02-24024 February 1997 PNO-IV-97-012:on 970222,licensee Transported Potentially Contaminated Individual to Matagorda General Hosp.Individual Received Laceration on Forehead & Another at Lips.State of Tx Will Be Informed PNO-IV-93-033, on 931029,contractor Employee Suffered Heart Attack at Site Outside Protected Area.Employee Transported to Local Hosp Where He Later Died.State of Tx Informed1993-11-0101 November 1993 PNO-IV-93-033:on 931029,contractor Employee Suffered Heart Attack at Site Outside Protected Area.Employee Transported to Local Hosp Where He Later Died.State of Tx Informed PNO-IV-93-003, on 930203,Unit 2 Tripped from Full Power on low-low Steam Generator Level Resulting in turbine-driven Auxiliary Feedwater Pump 24 Trip on Mechanical Overspeed. Cause Not Determined.Reactor Stabilized in Mode 31993-02-0404 February 1993 PNO-IV-93-003:on 930203,Unit 2 Tripped from Full Power on low-low Steam Generator Level Resulting in turbine-driven Auxiliary Feedwater Pump 24 Trip on Mechanical Overspeed. Cause Not Determined.Reactor Stabilized in Mode 3 PNO-IV-93-001, on 930112,NOUE Declared as Result of Commencing Reactor Shutdown Due to TS 3.0.3 Requirements. Caused by Inoperable Compensated Low Steam Line Pressure. Licensee Issued Press Release.State of Tx Informed1993-01-13013 January 1993 PNO-IV-93-001:on 930112,NOUE Declared as Result of Commencing Reactor Shutdown Due to TS 3.0.3 Requirements. Caused by Inoperable Compensated Low Steam Line Pressure. Licensee Issued Press Release.State of Tx Informed PNO-IV-91-013, on 910502,secretary of Licensee Security Manager Inadvertently Admitted Loaded Derringer Into Protected Area as She Entered Site on 910502.Employee Later Remembered Weapon in Purse & Reported Event to Security1991-05-0202 May 1991 PNO-IV-91-013:on 910502,secretary of Licensee Security Manager Inadvertently Admitted Loaded Derringer Into Protected Area as She Entered Site on 910502.Employee Later Remembered Weapon in Purse & Reported Event to Security PNO-IV-90-034, on 900929,Unit 1 Manually Tripped & Will Remain Shutdown to Allow Repairs to Bellows in Low Pressure Turbine.Unit 2 Entered First Refueling Outage1990-10-0101 October 1990 PNO-IV-90-034:on 900929,Unit 1 Manually Tripped & Will Remain Shutdown to Allow Repairs to Bellows in Low Pressure Turbine.Unit 2 Entered First Refueling Outage PNO-IV-90-030, on 900910,licensee Declared Unusual Event W/ Reactor at 100% Thermal Power & Reactor Shut Down.Also on 900909,inverter Declared Out of Svc Following Unexpected Trip.No Cause Found.Troubleshooting Continuing1990-09-10010 September 1990 PNO-IV-90-030:on 900910,licensee Declared Unusual Event W/ Reactor at 100% Thermal Power & Reactor Shut Down.Also on 900909,inverter Declared Out of Svc Following Unexpected Trip.No Cause Found.Troubleshooting Continuing PNO-IV-90-025, on 900716,Unit 1 Tripped from 100% Power During Operational Test of Reactor Trip Breaker Trip Actuating Device Which Forced Outage to Exceed 72 H.State of Tx Informed.No Press Release Issued1990-07-17017 July 1990 PNO-IV-90-025:on 900716,Unit 1 Tripped from 100% Power During Operational Test of Reactor Trip Breaker Trip Actuating Device Which Forced Outage to Exceed 72 H.State of Tx Informed.No Press Release Issued PNO-IV-90-024, on 900628,Steam Generator D PORV Found to Have Congealed Electro Hydraulic Control Fluid.Caused by Heat & Moisture from body-to-bonnet Steam Leak on Porv.Reactor Shut Down1990-07-0606 July 1990 PNO-IV-90-024:on 900628,Steam Generator D PORV Found to Have Congealed Electro Hydraulic Control Fluid.Caused by Heat & Moisture from body-to-bonnet Steam Leak on Porv.Reactor Shut Down PNO-IV-89-051A, on 890814,radioactive Contamination Found Outside Radiation Controlled Area in Stairwell of Mechanical Auxiliary Bldg & on 890817,contamination Found in 11A Mab Chiller Open Cooling Sys Discharge Drain.Events Unrelated1989-08-18018 August 1989 PNO-IV-89-051A:on 890814,radioactive Contamination Found Outside Radiation Controlled Area in Stairwell of Mechanical Auxiliary Bldg & on 890817,contamination Found in 11A Mab Chiller Open Cooling Sys Discharge Drain.Events Unrelated PNO-IV-89-051, radioactive Contamination Outside Radiation Controlled Area Discovered.Apparent Cause Associated W/Operation of Radwaste Evaporator.No Contamination Found in Neutralization Basin & No Personnel Contaminated1989-08-15015 August 1989 PNO-IV-89-051:radioactive Contamination Outside Radiation Controlled Area Discovered.Apparent Cause Associated W/Operation of Radwaste Evaporator.No Contamination Found in Neutralization Basin & No Personnel Contaminated PNO-IV-89-048, on 890713,main Transformer 2A Locked Out Due to Transformer Bursting,Causing Mineral Oil to Spill Into Transformer Oil in Recovery Pit.Caused by Loss of Power to Auxiliary Bus.Unit Will Not Be Restarted for 2 to 3 Days1989-07-14014 July 1989 PNO-IV-89-048:on 890713,main Transformer 2A Locked Out Due to Transformer Bursting,Causing Mineral Oil to Spill Into Transformer Oil in Recovery Pit.Caused by Loss of Power to Auxiliary Bus.Unit Will Not Be Restarted for 2 to 3 Days PNO-IV-89-033, on 890512,unusual Event Declared When Two of Four Pressurizer Water Level Indication Channels Inoperable. Reactor Shutdown.Possibly Caused by Valve Disc Stuck on Valve Seat.Insulation Installed on Piping1989-05-15015 May 1989 PNO-IV-89-033:on 890512,unusual Event Declared When Two of Four Pressurizer Water Level Indication Channels Inoperable. Reactor Shutdown.Possibly Caused by Valve Disc Stuck on Valve Seat.Insulation Installed on Piping PNO-IV-89-026, on 890405,unit Tripped from 11% Power Due to Lockout of Main & Auxiliary Transformers During Attempt to Synchronize Main Generator to Electrical Distribution Sys. Unit in Hot Standby & Startup Not Expected Until 8904091989-04-0606 April 1989 PNO-IV-89-026:on 890405,unit Tripped from 11% Power Due to Lockout of Main & Auxiliary Transformers During Attempt to Synchronize Main Generator to Electrical Distribution Sys. Unit in Hot Standby & Startup Not Expected Until 890409 PNO-IV-89-025, on 890406,util Declared Notification of Unusual Event at Facility Due to One Inoperable Diesel Generator.Util Declared Diesel Generator 12 Operable After Replacing Defective Resistor in Governor Control Circuit1989-04-0606 April 1989 PNO-IV-89-025:on 890406,util Declared Notification of Unusual Event at Facility Due to One Inoperable Diesel Generator.Util Declared Diesel Generator 12 Operable After Replacing Defective Resistor in Governor Control Circuit PNO-IV-89-024, on 890405,reactor Trip Occurred During Attempt to Synchronize Main Generator to Electrical Distribution Sys.Some Nonsafety Equipment Did Not Function as Expected. Resident Inspectors Will Continue to Monitor Activities1989-04-0505 April 1989 PNO-IV-89-024:on 890405,reactor Trip Occurred During Attempt to Synchronize Main Generator to Electrical Distribution Sys.Some Nonsafety Equipment Did Not Function as Expected. Resident Inspectors Will Continue to Monitor Activities PNO-IV-89-022, on 890328,reactor Power Increased Above 5% for First Time.License Issued Earlier Authorizing Full Power Operation.Power to Be Increased in Increments for Few Wks W/Performance of Equipment & Sys Tests at Various Levels1989-03-30030 March 1989 PNO-IV-89-022:on 890328,reactor Power Increased Above 5% for First Time.License Issued Earlier Authorizing Full Power Operation.Power to Be Increased in Increments for Few Wks W/Performance of Equipment & Sys Tests at Various Levels PNO-IV-89-020, Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants1989-03-23023 March 1989 PNO-IV-89-020:Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants PNO-IV-89-019, on 890315,util Received Allegations Re Util Incompetence & Mismanagement Re Const Costs & Plant Operation.Region IV Formed Multidisciplined Team to Identify Safety Issues.Util Also Conducting Investigation1989-03-16016 March 1989 PNO-IV-89-019:on 890315,util Received Allegations Re Util Incompetence & Mismanagement Re Const Costs & Plant Operation.Region IV Formed Multidisciplined Team to Identify Safety Issues.Util Also Conducting Investigation PNO-IV-89-016, on 890312,initial Criticality Achieved.Region IV Operational Readiness Review Insp Team on Site for First Days of Low Power Operation.Commission Meeting on Full Power License Scheduled for 8903281989-03-13013 March 1989 PNO-IV-89-016:on 890312,initial Criticality Achieved.Region IV Operational Readiness Review Insp Team on Site for First Days of Low Power Operation.Commission Meeting on Full Power License Scheduled for 890328 PNO-IV-89-013, on 890120,manual Turbine/Generator Trip Initiated When Hydrogen Fueled Fire Occurred in Main Generator.Testing Revealed That Wall Thickness of Bottom Mounted Instrumentation Thimble Tubes Below Requirement1989-03-0202 March 1989 PNO-IV-89-013:on 890120,manual Turbine/Generator Trip Initiated When Hydrogen Fueled Fire Occurred in Main Generator.Testing Revealed That Wall Thickness of Bottom Mounted Instrumentation Thimble Tubes Below Requirement PNO-IV-88-078, on 880923,util Plans to Begin Scheduled Outage to Inspect Bottom Mounted Instrument (Bmi) Tubes.On 880506, Util Reported That Review of Eddy Current Test Data on 58 Bmi Thimble Tubes Revealed Wear on 19 Thimble Tubes1988-09-23023 September 1988 PNO-IV-88-078:on 880923,util Plans to Begin Scheduled Outage to Inspect Bottom Mounted Instrument (Bmi) Tubes.On 880506, Util Reported That Review of Eddy Current Test Data on 58 Bmi Thimble Tubes Revealed Wear on 19 Thimble Tubes PNO-IV-88-072, on 880830,shutdown Began from Approx 45% Power to Repair Main Steam Vent Line Leak Coming from a Sock Weld. Licensee Will Insp Similar Socket Welds on Main Steam & Main Feed Lines Inside Containment During Shutdown1988-08-30030 August 1988 PNO-IV-88-072:on 880830,shutdown Began from Approx 45% Power to Repair Main Steam Vent Line Leak Coming from a Sock Weld. Licensee Will Insp Similar Socket Welds on Main Steam & Main Feed Lines Inside Containment During Shutdown PNO-IV-88-069, on 880824,util 100 H NSSS Acceptance Test Completed.Upon Completion of Review of Startup Test Results by Plant Operations Review Committee,Util Will Be in Position to Begin Commercial Operation.State of Tx Informed1988-08-24024 August 1988 PNO-IV-88-069:on 880824,util 100 H NSSS Acceptance Test Completed.Upon Completion of Review of Startup Test Results by Plant Operations Review Committee,Util Will Be in Position to Begin Commercial Operation.State of Tx Informed PNO-IV-88-066, on 880812,Region IV Notified of Truck Accident on Interstate 10,approx 30 Miles West of Baton Rouge.Truck Carrying Eight New Fuel Assemblies to Facility.Shipping Packages Undamaged.Packages Returned to State of Sc1988-08-12012 August 1988 PNO-IV-88-066:on 880812,Region IV Notified of Truck Accident on Interstate 10,approx 30 Miles West of Baton Rouge.Truck Carrying Eight New Fuel Assemblies to Facility.Shipping Packages Undamaged.Packages Returned to State of Sc PNO-IV-88-060, on 880728,licensee Tripped Reactor from 100% Power as Part of Planned 100% Power Plateau Initial Startup Test Program.Preliminary Results Satisfactory.Unit Will Remain in Hot Shutdown for Repairs1988-07-28028 July 1988 PNO-IV-88-060:on 880728,licensee Tripped Reactor from 100% Power as Part of Planned 100% Power Plateau Initial Startup Test Program.Preliminary Results Satisfactory.Unit Will Remain in Hot Shutdown for Repairs PNO-IV-88-051, failure of Westinghouse DS-416 Electrical Breakers.Failures Could Be Generic Problem.Westinghouse Representatives on Site Observing Testing,Insp & Installation of Subj Breakers1988-06-16016 June 1988 PNO-IV-88-051:failure of Westinghouse DS-416 Electrical Breakers.Failures Could Be Generic Problem.Westinghouse Representatives on Site Observing Testing,Insp & Installation of Subj Breakers PNO-IV-88-050, on 880613,Unit 1 Startup Following 880525 Shutdown Initiated.Subj Notification Issued as Plant Status Update.Maint Activities Performed During Outage.Completion of Testing at 30% Plateau Scheduled for 8806191988-06-14014 June 1988 PNO-IV-88-050:on 880613,Unit 1 Startup Following 880525 Shutdown Initiated.Subj Notification Issued as Plant Status Update.Maint Activities Performed During Outage.Completion of Testing at 30% Plateau Scheduled for 880619 PNO-IV-88-046, on 880525,steam-driven Main Feedwater Pump Failed.Licensee Preparing to Inspect Main Condenser for Damage.Repairs Should Take Several Days.No One Injured from Flying Debris.Facility Will Remain Shutdown1988-05-26026 May 1988 PNO-IV-88-046:on 880525,steam-driven Main Feedwater Pump Failed.Licensee Preparing to Inspect Main Condenser for Damage.Repairs Should Take Several Days.No One Injured from Flying Debris.Facility Will Remain Shutdown PNO-IV-88-045, on 880521,plant Startup Followed Extended Outage for Performance of Maint Work.Completion of Testing at 30% Plateau Scheduled for 880526.Upon Satisfactory testing,50% Plateau Will Commence on 8805271988-05-23023 May 1988 PNO-IV-88-045:on 880521,plant Startup Followed Extended Outage for Performance of Maint Work.Completion of Testing at 30% Plateau Scheduled for 880526.Upon Satisfactory testing,50% Plateau Will Commence on 880527 PNO-IV-88-039, on 880506,review of Eddy Current Test Data Revealed Wear on 19 Thimble Tubes.Caused by Flow Induced Vibrations.Util Expecting Recommendation for Corrective Action from Westinghouse1988-05-0909 May 1988 PNO-IV-88-039:on 880506,review of Eddy Current Test Data Revealed Wear on 19 Thimble Tubes.Caused by Flow Induced Vibrations.Util Expecting Recommendation for Corrective Action from Westinghouse PNO-IV-88-036, util Begun 2 to 3-wk Maint Outage.Startup Testing Completed on 30% Power Testing Plateau.Licensee Also Plans to Replace Corroded Aluminum Bronze Fittings & Valves in Essential Cooling Water Sys.State of Tx Informed1988-05-0404 May 1988 PNO-IV-88-036:util Begun 2 to 3-wk Maint Outage.Startup Testing Completed on 30% Power Testing Plateau.Licensee Also Plans to Replace Corroded Aluminum Bronze Fittings & Valves in Essential Cooling Water Sys.State of Tx Informed PNO-IV-88-030, on 880418,Train a Control Room Ventilation Makeup Supply Damper Failed to Close During Surveillance. Licensee Repaired Failed Damper & Plant Returned to Power Escalation from 13% Power1988-04-18018 April 1988 PNO-IV-88-030:on 880418,Train a Control Room Ventilation Makeup Supply Damper Failed to Close During Surveillance. Licensee Repaired Failed Damper & Plant Returned to Power Escalation from 13% Power PNO-IV-88-024, on 880330,reactor Trip & Safety Injection Occurred Due to Loss of Offsite Power.Caused by Troubleshooting Work on Main Generator Control Circuits to Determine Cause of Main Generator Output Breaker Trip1988-03-31031 March 1988 PNO-IV-88-024:on 880330,reactor Trip & Safety Injection Occurred Due to Loss of Offsite Power.Caused by Troubleshooting Work on Main Generator Control Circuits to Determine Cause of Main Generator Output Breaker Trip ML20148G1711988-03-17017 March 1988 PNS-IV-88-001:on 880316,telephone Threat Against Util & Plant Received at Corporate Ofc in Houston,Tx.Caller Stated That Two Power Poles Had Been Cut Down.Util Confirmed That Two Poles Had Been Cut Down.Contingency Plans Implemented PNO-IV-88-018, on 880301,local Business Agents for Const Electricians & Pipefitters Stopped Supervision of Field Work.Work Supervised by Nonmanual & Supervisory Personnel. Law Enforcement Authorities Notified Due to Fights1988-03-0202 March 1988 PNO-IV-88-018:on 880301,local Business Agents for Const Electricians & Pipefitters Stopped Supervision of Field Work.Work Supervised by Nonmanual & Supervisory Personnel. Law Enforcement Authorities Notified Due to Fights PNO-IV-88-016, on 880228,reactor Trip Occurred W/Control Rods Positioned for Initial Criticality & Boron Dilution Was in Progress.Caused by Spurious Signal from Loop 3 lo-lo Temp Cold.Test Procedures Modified to Restart Testing1988-02-29029 February 1988 PNO-IV-88-016:on 880228,reactor Trip Occurred W/Control Rods Positioned for Initial Criticality & Boron Dilution Was in Progress.Caused by Spurious Signal from Loop 3 lo-lo Temp Cold.Test Procedures Modified to Restart Testing PNO-IV-87-060, on 871122,auxiliary Feed Sys Vibration Resulting in Pipe Failure Occurred.Occurrence Will Impact Startup Schedule.Licensee Investigating Failure & NRC Monitoring Activities1987-11-23023 November 1987 PNO-IV-87-060:on 871122,auxiliary Feed Sys Vibration Resulting in Pipe Failure Occurred.Occurrence Will Impact Startup Schedule.Licensee Investigating Failure & NRC Monitoring Activities PNO-IV-87-045, on 870913,two of Six Seismic Monitors Recorded Deflation of About 0.01 G & Alarmed.Licensee Contacted Regional & Natl Seismic Monitoring Stations.Insp Shows No Evidence of Damage1987-09-14014 September 1987 PNO-IV-87-045:on 870913,two of Six Seismic Monitors Recorded Deflation of About 0.01 G & Alarmed.Licensee Contacted Regional & Natl Seismic Monitoring Stations.Insp Shows No Evidence of Damage PNO-IV-87-043, on 870903,fire Occurred in Auxiliary Transformer & Switchgear Room 13.8 Kv Busing.Investigation Underway to Determine Cause of Electrical Fault & Resulting Fire1987-09-0404 September 1987 PNO-IV-87-043:on 870903,fire Occurred in Auxiliary Transformer & Switchgear Room 13.8 Kv Busing.Investigation Underway to Determine Cause of Electrical Fault & Resulting Fire PNO-IV-87-040, on 870828,painter Working in Unit 1 Turbine Bldg Injured from Fall of Approx 25 Ft.Painter Transported to Matagorda General Hosp & Then to St Lukes Hosp in Houston1987-08-28028 August 1987 PNO-IV-87-040:on 870828,painter Working in Unit 1 Turbine Bldg Injured from Fall of Approx 25 Ft.Painter Transported to Matagorda General Hosp & Then to St Lukes Hosp in Houston PNO-IV-87-023, on 870430,const Craftsman Fell 30 Ft from Ladder & Suffered Broken Elbow & Concussion.Another Man Onsite Found Dead of Heart Attack1987-04-30030 April 1987 PNO-IV-87-023:on 870430,const Craftsman Fell 30 Ft from Ladder & Suffered Broken Elbow & Concussion.Another Man Onsite Found Dead of Heart Attack PNO-IV-87-010, on 870317,plant Experienced Failure of Circulating Water Pump Pedestal Casing.Piece of Pedestal Casing Blown Out by Water Pressure Rendering Pump Inoperable.Licensee Assessing Damage & Cause of Event1987-03-18018 March 1987 PNO-IV-87-010:on 870317,plant Experienced Failure of Circulating Water Pump Pedestal Casing.Piece of Pedestal Casing Blown Out by Water Pressure Rendering Pump Inoperable.Licensee Assessing Damage & Cause of Event PNO-IV-87-009A, on 870311,steam/water Hammer Event Occurred in Component Cooling Water Lines Servicing RHR HX Trains B & C.Caused by Operational Errors.After Cooldown from Hot Functional Testing,Sys Damage Will Be Repaired1987-03-13013 March 1987 PNO-IV-87-009A:on 870311,steam/water Hammer Event Occurred in Component Cooling Water Lines Servicing RHR HX Trains B & C.Caused by Operational Errors.After Cooldown from Hot Functional Testing,Sys Damage Will Be Repaired PNO-IV-87-009, on 870311,steam/water Hammer Event Occurred in Component Cooling Water Lines Servicing RHR HX Trains B & C. Caused by Operator Overlooking Step in Procedure.All Hot Functional Testing Put on Hold Pending Evaluation1987-03-13013 March 1987 PNO-IV-87-009:on 870311,steam/water Hammer Event Occurred in Component Cooling Water Lines Servicing RHR HX Trains B & C. Caused by Operator Overlooking Step in Procedure.All Hot Functional Testing Put on Hold Pending Evaluation ML20207P8391987-01-15015 January 1987 PNS-IV-87-001:during pre-hot Functional Test Insp of Reactor Coolant Pumps,Licensee Discovered 14-inch Metal Spike Inserted Between Rotor & Stator of Loop C.Formal Access Control Established.Insp for Addl Tamperings in Progress PNO-IV-87-004, on 870114,licensee Discovered Problem W/One Diesel Generator While Performing 24 H Preoperational Test. Caused by Stuck Intake Valve Push Rod.Diesel Generator Shutdown & Repaired by Licensee1987-01-14014 January 1987 PNO-IV-87-004:on 870114,licensee Discovered Problem W/One Diesel Generator While Performing 24 H Preoperational Test. Caused by Stuck Intake Valve Push Rod.Diesel Generator Shutdown & Repaired by Licensee PNO-IV-86-034, on 861031,foam Suppression Sys for Emergency Diesel Generator 13 Fuel Oil Storage Tank Room Manually Activated & on 861111,nitrogen Sys for 365-kV - 13.8-kV Standby Transformer Found Overpressurized1986-11-12012 November 1986 PNO-IV-86-034:on 861031,foam Suppression Sys for Emergency Diesel Generator 13 Fuel Oil Storage Tank Room Manually Activated & on 861111,nitrogen Sys for 365-kV - 13.8-kV Standby Transformer Found Overpressurized 1999-08-23 Category:TEXT-INSPECTION & AUDIT & I&E CIRCULARS MONTHYEARIR 05000498/19990161999-10-0707 October 1999
[Table view]Insp Repts 50-498/99-16 & 50-499/99-16 on 990808-0918.No Violations Noted.Major Areas Inspected:Aspects of Licensee Operations,Maint,Engineering & Plant Support IR 05000498/19990151999-09-29029 September 1999 Insp Repts 50-498/99-15 & 50-499/99-15 on 990920-24.No Violations Noted.Major Areas Inspected:Licensed Operators Requalification Program IR 05000199/19990121999-09-14014 September 1999 Insp Repts 50-498/99-12 & 50-199/99-12 on 990816-19.Three Violations Noted & Being Treated as Ncvs.Major Areas Inspected:Access Authorization,Assessment Aids,Security Event Logs & Security Program Audits IR 05000499/19990141999-09-0303 September 1999 Insp Repts 50-499/99-14 & 50-499/99-14 on 990627-0807.NCVs Noted.Major Areas Inspected:Aspects of Licensee Operation, Maint,Engineering & Plant Support PNO-IV-99-037, on 990822,Region IV Dispatched Inspector to STP to Relieve Resident Inspectors & to Provide Assistance to STP Nuclear Operating Co,In Anticipation of Hurricane Bret.Representative Was Also Dispatched to FEMA Region VI1999-08-23023 August 1999 PNO-IV-99-037:on 990822,Region IV Dispatched Inspector to STP to Relieve Resident Inspectors & to Provide Assistance to STP Nuclear Operating Co,In Anticipation of Hurricane Bret.Representative Was Also Dispatched to FEMA Region VI IR 05000498/19990081999-08-16016 August 1999 Insp Repts 50-498/99-08 & 50-499/99-08 on 990517-21 & 0607- 10.No Violation Noted.Major Areas Inspected:Corrective Action Program Implementation at Plant IR 05000498/19993011999-07-26026 July 1999 Exam Repts 50-498/99-301 & 50-499/99-301 on 990706-15.Exam results:17 Applicants Passed Exams & Exhibited No Broad Knowledge or Training Weaknesses IR 05000498/19990131999-07-21021 July 1999 Insp Repts 50-498/99-13 & 50-499/99-13 on 990516-0626. Noncited Violations Noted Re Failure to Follow Procedures by Shift Supervisor Authorizing Deviation from Procedure Used to vacuum-fill RHR Sys & to Follow Plant Startup Procedure IR 05000498/19990111999-06-10010 June 1999 Insp Repts 50-498/99-11 & 50-499/99-11 on 990404-0515.No Violations Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support IR 05000498/19990091999-05-25025 May 1999 Insp Repts 50-498/99-09 & 50-499/99-09 on 990503-06.No Violations Noted.Major Areas Inspected:Operational Status of Licensee Emergency Preparedness Program ML20206H6361999-05-0505 May 1999 Insp Repts 50-498/99-06 & 50-499/99-06 on 990221-0403. Non-cited Violations Noted.Major Areas Inspected:Operations, Maintenance,Engineering & Plant Support IR 05000498/19990071999-04-22022 April 1999 Insp Repts 50-498/99-07 & 50-499/99-07 on 990405-09. Violations Noted.Major Areas Inspected:Radiation Protection Program Focusing on Unit 1 Refueling Outage Activities IR 05000498/19990101999-04-22022 April 1999 Insp Repts 50-498/99-10 & 50-499/99-10 on 990405-09.No Violations Noted.Major Areas Inspected:Review of Licensee Inservice Exam Program Plan & Schedule & Implementation of Program Plan for Facilities IR 05000498/19990051999-03-29029 March 1999 Insp Repts 50-498/99-05 & 50-499/99-05 on 990301-05.No Violations Noted.Major Areas Inspected:Engineering IR 05000498/19980191999-03-26026 March 1999 Insp Repts 50-498/98-19 & 50-499/98-19 on 990125-0317. Violations Noted.Major Areas Inspected:Operations & Engineering IR 05000498/19990041999-03-24024 March 1999 Insp Repts 50-498/99-04 & 50-499/99-04 on 990222-25. Violations Noted.Major Areas Inspected:Maint ML20205A1601999-03-24024 March 1999 Insp Repts 50-498/99-04 & 50-499/99-04 on 990222-25. Violations Noted.Major Areas Inspected:Maint IR 05000498/19980171999-03-23023 March 1999 Cancellation of Insp Repts 50-498/98-17 & 50-499/98-17.No Insp Rept Will Be Issued for Util with Listed Number IR 05000498/19990021999-03-16016 March 1999 Insp Repts 50-498/99-02 & 50-499/99-02 on 990110-0220. No Violations Noted.Major Areas Inspected:Licensee Operations, Maint,Engineering & Plant Support IR 05000498/19990031999-03-0404 March 1999 Insp Repts 50-498/99-03 & 50-499/99-03 on 990222-25.No Violations Noted.Major Areas Inspected:Plant Support ML20203D5711999-02-10010 February 1999 Insp Repts 50-498/98-15 & 50-499/98-15 on 990614-1123. Violations Noted.Major Areas Inspected:Review of Circumstances Surrounding 980614 Fire in Potential Transformer & Subsequent Deenergization of Switchgear E1B ML20203D5611999-02-10010 February 1999 Notice of Violation from Insp on 980614-1123.Violation Noted:From 980614-0615,period Greater than 8 Hours,Unit 1 Channel III 125-volt Battery Bank E1B11 Inoperable with Reactor in Mode 1 & Reactor Not Placed in Hot Standby IR 05000498/19980111999-02-0404 February 1999 Insp Repts 50-498/98-11 & 50-499/98-11 on 981129-990109.No Violations Noted.Major Areas Inspected:Operations, Maintenance,Engineering & Plant Support IR 05000498/19990011999-01-27027 January 1999 Insp Repts 50-498/99-01 & 50-499/99-01 on 990104-07.No Violations Noted.Major Areas Inspected:Insp Reviewed Implementation of Solid Radwaste Mgt & Radioactive Matl Transportation Programs & Plant Support IR 05000498/19980161998-12-24024 December 1998 Insp Repts 50-498/98-16 & 50-499/98-16 on 981207-10.No Violations Noted.Major Areas Inspected:Plant Support, Including Alarm Stations,Security Equipment,Vital Area Barriers & Detection Aids & Security Event Logs IR 05000498/19980101998-12-22022 December 1998 Insp Repts 50-498/98-10 & 50-499/98-10 on 981018-1125.No Violations Noted.Major Areas Inspected:License Operations, Maint,Engineering & Plant Support ML20196G9171998-12-0202 December 1998 Notice of Violation from Insp on 981102-05.Violation Noted:Licensee Did Not Make Surveys to Ensure Compliance with 10CFR20.1902,requiring Posting of Each Radiation Area with Conspicuous Sign or Signs Bearing Radiation Symbol IR 05000498/19980201998-12-0202 December 1998 Insp Repts 50-498/98-20 & 50-499/98-20 on 981102-05. Violation Noted.Major Areas Inspected:Radiological Controlled Area Access Controls,Radiation Work Permits, Radiological Surveys & pre-job Health Physics Briefings IR 05000498/19980091998-11-12012 November 1998 Insp Repts 50-498/98-09 & 50-499/98-09 on 980906-1017. Violations Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support ML20195F2921998-11-12012 November 1998 Notice of Violation from Insp on 980906-1017.Violation Noted:On 980922,Work Order BS-354091 Contained Maint Instructions That Were Inappropriate to Circumstances IR 05000498/19980181998-10-21021 October 1998 Insp Repts 50-498/98-18 & 50-499/98-18 Has Been Canceled.No Insp Rept Will Be Issued IR 05000498/19980081998-09-28028 September 1998 Insp Repts 50-498/98-08 & 50-499/98-08 on 980726-0905.No Violations Noted.Major Areas Inspected:Operations, Maintenance,Engineering & Plant Support IR 05000498/19980141998-08-31031 August 1998 Insp Repts 50-498/98-14 & 50-499/98-14 on 980706-23.No Violations Noted.Major Areas Inspected:Engineering IR 05000498/19980131998-08-14014 August 1998 Insp Repts 50-498/98-13 & 50-499/98-13 on 980804-07.No Violations Noted.Major Areas Inspected:Licensee Performance & Capabilities During full-scale,biennial Exercise of Emergency Plan & Implementing Procedures IR 05000498/19980071998-08-11011 August 1998 Insp Repts 50-498/98-07 & 50-499/98-07 on 980614-0725.No Violations Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support IR 05000498/19983011998-07-14014 July 1998 Insp Repts 50-498/98-301 & 50-499/98-301 on 980601-04.No Violations Noted.Major Areas Inspected:Examiners Evaluated Competency of 6 Senior Operator Applicants for Issuance of Operating Licenses at Plant,Units 1 & 2 & Operations ML20236M3011998-07-0808 July 1998 Notice of Violation from Insp on 980503-0613.Violation Noted:Fire Brigade Training Drill Did Not Assess Each Member'S Knowledge of Role in Fire Fighting Strategy for Area Assumed to Contain Fire IR 05000498/19980061998-07-0808 July 1998 Insp Repts 50-498/98-06 & 50-499/98-06 on 980503-0613. Violations Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support ML20237E7231998-06-0202 June 1998 EN-98-042:informs Commission That NRC Will Issue Confirmatory Order Modifying Licensee (Effective Immediately) & Exercise Discretion IAW Section VII.B.6 of Enforcement Policy Not to Issue NOV IR 05000498/19980051998-05-18018 May 1998 Insp Repts 50-498/98-05 & 50-499/98-05 on 980322-0502. Violation Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support ML20247M4751998-05-18018 May 1998 Notice of Violation from Insp on 980322-0502.Violation Noted:Combustible Matl,Specifically,Wood Scaffold Installed & Remained in safety-related 2A Isolation Valve Cubicle from Feb 1997 Until April 1998,unattended & W/O Evaluation IR 05000498/19980041998-04-20020 April 1998 Insp Repts 50-498/98-04 & 50-499/98-04 on 980214-0321. Violations Noted.Major Areas Inspected:Operations,Maint, Engineering,Plant Support ML20217A8451998-04-20020 April 1998 Notice of Violation from Insp on 980214-0321.Violation Noted:Licensee Updated UFSAR to Reflect New LOCA Radiological Analysis,Which Increased Thyroid Dose to CR Operator,W/O Obtaining Prior NRC Review & Approval ML20217B5581998-03-24024 March 1998 Notice of Violation from Insp on 980104-0214.Violation Noted:Fire Hose Stations Listed in Addendum 3 of Procedure OPGP03-ZF-0018 Not Operable When Equipment in Area to Be Protected Required to Be Operable by TS IR 05000498/19980121998-03-24024 March 1998 Insp Repts 50-498/98-12 & 50-499/98-12 on 980223-27.No Violations Noted.Major Areas Inspected:Licensee Physical Security Program,Including Review of Access Authorization Program,Testing & Maint & Security Program Plans IR 05000498/19980031998-03-24024 March 1998 Insp Repts 50-498/98-03 & 50-499/98-03 on 980104-0214. Violation Noted.Major Areas Inspected:Operations,Maint, Engineering & Plant Support Re Emergency Facilities ML20202D7781998-02-12012 February 1998 Insp Repts 50-498/98-02 & 50-499/98-02 on 980112-15. Violations Noted.Major Areas Inspected:Operations & Plant Support Re Radiation Protection ML20202D7701998-02-12012 February 1998 Notice of Violation from Insp on 980112-15.Violation Noted: Radiation Workers Who Were Likely to Receive Occupational Dose in Excess of 100 Mrems Per Yr Were Not Informed of Presence of Airborne Radioactivity IR 05000498/19970081998-01-23023 January 1998 Insp Repts 50-498/97-08 & 50-499/97-08 on 971116-980103.No Violations Noted.Major Areas Inspected:Operations, Engineering,Maint & Plant Support ML20197F3461997-12-22022 December 1997 Notice of Violation from Insp on 971112.Violations Noted: Programmatic Calculation Deficiencies,First Identified in Observation 92-01-13 Not Promptly Corrected 1999-09-03 |
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
f
\ March 31, 1988 giMMINARYNOTIFICATIONOFEVENTORUNUSUALOCCURRENCE--PN0-IV-88-24 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or eva kation, and is basically all that is known by the Region IV staff on this date.
FACILITY: Licensee Emergency Classification:
Houston Lighting & Tower Co. X Notification of Unusual Event Sovth Texos, Unit #1 Alert ON: 50-498 Site Area Emergency General Emergency Not Applicable
SUBJECT:
REACTOR TRIP AND SAFETY INJECTION OUE TO LOSS OF 0FFSITE POWER At 9:13 p.m. on March 30, 1988 with the plant at 8 percent power steaning to the main condenser via the turbine bypass valves, a reactor trip occurred due to a series of main generator lockout and main transformer lockout relays tripping when a test signal was incorrectly inserted into the generator control circuits. This was folicwed by switchyard breakers opening which removed offsite power to non-vital busses and the "A" train vital bus. This series of events was inadvertently initiated by troubleshooting work being performed on main generator control circuits. Earlier in the day, at about 9:30 a.m.
while generating about 100 megawatts electrical to the grid for the first time, the main gererator output breaker tripped open. The troubleshooting was to determine and ccrrect the catse. The loss of power to the control rod drive MG sets caused the rods to unlatch, and then the high rate of neutron flux decreasing tripped the reactor. The reactor trip coupled with low decay heat in the new core caused reactor coolant temperature to decrease which in turn initiated safety injection on the low-low T-cold compensated rate. No water was injected because reactor coolant system pressure was maintained. The "A" train emergency diesel started and assun.ed loads upon loss of power to the "A" train vital bus, and satisf actorily supplied power to the bus for about two hours until offsite power was restored. The "B" and "C" train diesels started satisfactorily upon initiation of the safety injection signal. All other systems appear to have responded normally.
At 9:22 p.m. a NOUE was declared. At 9:38 p.m. , the NOUE was teminated.
At 9:29 p.m., the state of Texas was informed. At 10:15 p.m. the NRC Headquarters duty officer was inforced. The licensee plans to issue a press release today.
The resident inspectors will followup. The licersee expects to be shut down at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to corp,ete the evaluation of the event and trouble shoot j and repair the original problem.
The licensee plans to issue a press release. {
O
\
The state of Texas will be informed.
Region IV received notification of this occurrence by telephone from the Headquarters Duty Officer at 10:40 p.m. (CST) on March 30, 1988. Region IV has informed NRR/PA. !
]4]{240880331
d .
S ,
This infomation has been confirmed with a licensee representative.
CONTACT: G. L. Constable (Ext 151)
DRP 4 LJCallan:cnm RA h RDMarrTn 3/4;//88 3/ /988 DISTRIBUTION:
H. St. MNBB OWF MAIL: DCS (Original IE 34)
Chairman Zech XEM W UOT(Trans only)
Com Roberts ED0 OGC Conm. Bernthal ARM FAX: INP0 Com. Ca: NL O!A NSAC Com. Rogers RES 01 RRI SECY NMSS NRC OC CA NRR LICENSEE (ReactorLic.)
PDR SLITP OGC-H GPA ACRS 5520: 8/ 31/88 0 REGIONS & HQ
_ _ _ -