ML17223B320
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| ML17223B320 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 11/13/1991 |
| From: | SAGER D A FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| L-91-310, NUDOCS 9111200215 | |
| Download: ML17223B320 (5) | |
Similar Documents at Saint Lucie | |
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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO
MONTHYEARML17229A7401998-05-26026 May 1998
[Table view]Special Rept:On 980507,declared Plant Meteorological Tower Ten Meter Wind Speed Indicator Inoperable Due to Loss of Indicator.Tightened Loose Ground Wire Connection & Returned Indicator to Service ML17229A4981997-10-17017 October 1997 Special Rept:On 970921,discovered That Several Heated Juction Thermocouple Inputs to Channel B of Rvlm Sys Deviating from Normal Temps.Rvlm Sys Will Be Restored to Operability Before End of Next Unit 2 Refueling Outage ML17229A4421997-08-0808 August 1997 Special Rept:On 970731,determined That Use of Conservative Min Value for Pin/Box Factor in Analysis of Record,Compared to Actual Value of Cycle 10 Min Pin/Box Factor,Introduced Conservation of .0073 in Energy Redistribution Factors ML17228B2661995-09-11011 September 1995 Special Rept:On 950812,post Hurricane Erin Beach Dune Survey Performed.Average Values of Results Greater than or within Range Provided in St Lucie Unit 1 Final Usar,Section 2.4.2.2 & Acceptable ML17228B2111995-07-0606 July 1995 Special Rept:On 950606,1A EDG Automatically Tripped on High Water Jacket Temp.Caused by Misapplication of Calibration Test Equipment for Temp Switch.Temp Switch Replaced ML17228B1761995-06-17017 June 1995 Special Rept:On 950517,1B EDG Engine Start Failure Alarm Sounded 30 Min Into Surveillance Run.Caused by Failure of One cylinder.1B EDG Declared Out of Svc.Failed Governer Assembly Replaced.Failed Assembly Sent Out for Insp ML17228A9781995-01-0909 January 1995 Special Rept:On 941214,2A Emergency Diesel Generator Failed. Caused by Excessive Clearance Between Speed Adjusting Shaft & Shaft Bushing.Electrical Maint Replaced Failed Governor/ Actuator Assembly on 2A2 EDG ML17228A9171994-11-23023 November 1994 Special Rept:On 941028,EDG Failure Occurred Due to Burned Through Wire from Magnetic Amplifier Terminal Block to Field.Wire Repaired & Relanded to Terminal Block ML17228A8521994-09-0909 September 1994 Special Rept:On 940823 & 25,RAB Exhaust Sys WRGM RM-26-90 Declared Out of Svc.Caused by Intermittment Communication Due to Power Supply Regulator Failure.Chemistry Procedure C-93 Implemented & Portable Monitor Installed ML17228A5891994-06-0202 June 1994 Special Rept:On 940504,non-valid Failure of EDG 1A Occurred Due to Spurious Actuation of High Water Jacket Temp Switch (Designated TS-59-003A).Subj Switch Replaced W/New Model 9025G & EDG 1A Declared Back in Svc on 940505 ML17228A4881994-03-0101 March 1994 Special Rept:On 920424,EDG 1B Failed Due to Failed Fan Idler Shaft.Caused by Inadequate Design.Radiation Fan Idler Shaft on Both 1A & 1B EDGs Replaced ML17228A1331993-04-19019 April 1993 Special Rept:On 930310,longitudinal Channel of Common Seismic Monitor Recorder & Indicator Declared Out of Svc & Remained Out of Svc Longer than Allowed by Ts.Util Awaiting Repairs to Instruments by Vendor ML17227A7731993-03-22022 March 1993 Special Rept:On 930307,SG Blowdown Treatment Facility Bldg Exhaust Sys Radiation Monitor Failed Functional Test & Declared Inoperable.Monitor Out of Svc for More than 72 H Due to Repair Problems.Detector Repaired & Placed in Svc ML17227A6881993-01-14014 January 1993 Special Rept:On 921208,channel 7 of Loose Parts Monitoring Sys Declared Out of Svc Due to Excessive Electrical Noise Received at Preamplifier for More than 30 Days.Complete Channel Calibr Performed.Channel 8 Still Available ML17227A6631992-12-14014 December 1992 Revised Special Rept:On 920630,DG 1A Declared Out of Svc in Order to Perform Preventive Maint on Air Start Sys.On 920701 DG Tripped Due to High Water Jacket Temp.Temp Switch TS-59-003A Replaced W/New Switch ML17227A5211992-07-27027 July 1992 Special Rept:On 920630,DG 1A Declared Out of Svc in Order to Perform Preventative Maint on Air Start Sys.Caused by Spurious Operation of Trip Which Is Bypassed in Emergency Operating Mode.Temp Switches Repaired & Reinstalled ML17227A4241992-05-14014 May 1992 Special Rept:On 920421,turbine Generator Failed to Trip Following Manual Reactor Trip.Caused by Failures in Redundant & Electrically Independent Turbine Tripping Schemes.I&C Disassembled & Trip Block Inspected ML17227A4031992-04-28028 April 1992 Special Rept:On 920403,EDG 1B Output Breaker Would Not Close During Weekly Operational Check.Caused by Failure of Underfrequency Permissive Circuit Relay.Failed Relay Replaced & EDG Successfully Started ML17227A4021992-04-24024 April 1992 In-House Event Rept 92-023:on 920421,turbine Generator Failed to Trip During Manual Reactor Trip.Root Cause Analysis Still in Progress.Solenoid Valves Removed & Sent to Independent Lab for Analysis ML17223B3931991-12-20020 December 1991 Special Rept:On 911129,emergency Diesel Generator 1B Started for Weekly Operational Check & Output Voltage Climbed Above Nominal Voltage.Caused by Failed Component in Voltage Regulator Card.Regulator Card Replaced ML17223B3201991-11-13013 November 1991 Special Rept:On 911021 & 22,1B EDG Failed During 24 Hr Surveillance Runs.First Failure Caused by Broken Shaft Due to Fatigue at High Stress Location.New Shaft,Of Modified Design,Installed.Run Performed Satisfactorily on 911027 ML17223B2401991-08-0606 August 1991 Special Rept:On 910705,valid Failure of Emergency Diesel Generator 1A Occurred.Caused by Damaged Bodine Motor. Damaged Motor Replaced ML17223B2331991-07-26026 July 1991 Special Rept:On 910626,failure of 2B Emergency Diesel Generator Occurred During post-maint Testing Following Implementation of Plant Mod.Caused by Failed Relay.Relay R1X1 Replaced ML17223B2111991-06-0606 June 1991 Special Rept:On 910513,determined That Plant Criteria for Fishkill Had Been Met.Cause of Mortality Is Insufficient Food Supply.Fish Removed & Disposed of on Site & Velocity Caps Rebuilt ML17223B1681991-04-17017 April 1991 Special Rept:On 910320,1B Emergency Diesel Generator (DG) Nonvalid Failure Occurred Due to Circuitry Failure of DG Synchronizing Circuitry.Relay Exhibiting Binding Calibr & Will Be Replaced ML17223B1051991-02-15015 February 1991 Special Rept:On 910116,troubleshooting Revealed Defective Limit Switch Assembly on 2B2 Governor of Edg.Switch Assembly Replaced & 2B EDG Successfully Retested.Sys Engineer Will Track Limit Switch for Each EDG ML17223B0571991-01-0707 January 1991 Special Rept:On 901130,loose Parts Monitor Declared Out of Svc for More than 30 Days.Caused by Presence of Large Hz Signal.Troubleshooting Efforts Will Resume on Inaccessible Areas of Sys During Next Available Opportinity ML17223A6541990-05-15015 May 1990 Special Rept:On 900405,loose Parts Detection Sys Channel out-of-svc for Greater than 30 Days.Cause of Failure Not Determined.Efforts Continuing to Identify Source of Electrical Noise & Mechanism for Induction Into Sys ML17223A5421990-03-0202 March 1990 Special Rept:On 900103,emergency Diesel Generator 2A Experienced Load Control Problems.Caused by Loose Connections in Governor Load Sensor Circuit.Loose Connections Tightened & Replacement Relay Installed ML17223A1621989-06-0505 June 1989 Special Rept:On 890406,emergency Diesel Generator 2A Failed. Caused by Thrust Bearing Failure Due to Excessive Clearance Between Bearing Collar & Fan Shaft.Cooling Fan Blades & Shroud Repaired ML17222A7711989-04-27027 April 1989 Special Rept:On 890315,diesel Tripped on High Crankcase Pressure.Caused by Engine Design.Pressure Trip Reset,But Output Breaker Failed to Close.Faulty Voltage Monitoring Relay Replaced.On 890321,same Diesel Generator Tripped ML17222A7331989-03-20020 March 1989 Special Rept:On 890117 & 0203,emergency Diesel Generators 2A & 2B Failed.Diesel Trip Caused by Engine Design.Oil Splash Guards Will Be Installed on All Plant Diesels & Step Added to ESF Test Procedure ML17221A6871988-03-25025 March 1988 Special Rept:On 880314,steam Generator Blowdown Bldg Exhaust Noble Gas Radiation Monitor Failed.Caused by Failed Central Processing Unit Processor Board.Portable Particulate,Iodine & Noble Gas Monitor Installed Until New Monitor in Place ML17221A6421988-02-19019 February 1988 Special Rept:On 880112,emergency Diesel Generator 2A Failed to Start.Caused by Failed Speed Setting Bodine Motor on 12 Cylinder Engine Governor.Motor Replaced & Generator Returned to Svc ML17221A5001987-11-0909 November 1987 Special Rept:On 871005,emergency Diesel Generator 2B Took Greater than 17 to Start Up & Load Onto Bus.Caused by Failure of Governor of Engines.Mechanical Section of Governor Replaced ML17221A4541987-10-19019 October 1987 Special Rept:On 870902,General Motors Emergency Diesel Generator Failed to Start.Caused by 12-cylinder Engine Actuator Friction Clutch Assembly Out of Adjustment.Clutch Assembly Adjusted ML17219A6741987-07-0606 July 1987 Special Rept:On 870609,personnel Discovered That Less than Required Number of Sensors in One of Two Available Reactor Vessel Level Monitoring Sys Channels Operable.Caused by Personnel Error & Deficiency in Surveillance Procedure ML17219A6661987-07-0101 July 1987 Special Rept:On 870528,city Water Tank 1B Declared Inoperable for More than 7 Days in Violation of Tech Specs to Perform Necessary Maint.Caused by Necessary Repairs to Protective Coating Sys to Prevent Further Corrosion ML17216A5551986-05-0707 May 1986 Special Rept:On 860312,alarm Received Indicating That Diesel Engine Failed to Start.Caused by Insufficient Torqued Nut. on 860326,diesel Generator Tripped on High Crankcase Pressure.Caused by Oil Splashing on Pressure Switch ML17301A1501985-01-21021 January 1985 Special Rept:On 841220,during Surveillance Run of Diesel Generator 2B While Unit Shut Down,Radiator Cooling Fan Hub Found Loosened & Cracked Circumferentially.Mod Issued to Eliminate Possibility of Set Screw Loosening ML20023C4091983-05-0909 May 1983 RO 389-83-005:on 830507,safety Injection Tank Isolation Valves Closed W/Plant in Mode 4 Above 276 Psia.Caused by Personnel Error.Procedural Step Overlooked During Plant Heatup.Valves Immediately Opened ML20011A7991981-10-26026 October 1981 RO 335-81-46:steam Generator Tube Eddy Current Test Performed in Ctr Area of B Steam Generator to Confirm Leak Located by Helium Test.Cause Not Stated.Testing of Rows 1-18 Will Be Completed within 2 to 3 Days ML17266A4521981-04-24024 April 1981 RO 335-81-19:on 810410,notification Made to NRC of Analyses Utilizing FSAR Assumptions for Certain Postulated Accidents Using Assumption That Reactor Coolant Pressure Tripped Upon Receipt of Sias.Item Determined Not Reportable ML17209A7121980-12-19019 December 1980 RO 80-003:on 801202,ocean Intake Area Recording Thermograph Sys Reported Lost.Probably Caused by Storm Surge Wave Action or Commercial Fishing.Sys Replaced on 801210 ML20003B6641980-12-19019 December 1980 Nonroutine Environ Operating Rept 335-B-80-03:on 801202, Ocean Intake Area Recording Thermograph Sys Was Reported Missing.Probably Caused by Storm Surge Wave Action or Commercial Fishing.Sys Was Replaced on 801210 ML17266A2161980-06-11011 June 1980 RO 335-80-29:on 800611,ground Occurred on Bus 1B Dc Causing Containment Isolation Valve HCV-14-6 to Fail Closed. Apparently Caused by Water in Solenoid from Steam Leak. Cooldown Continuing.Damaged Valve Seals Will Be Replaced ML17266A2111980-05-15015 May 1980 RO 335-80-27:on 800514,C-E Informed Util That Partial Draining of RCS While in Mode 5 Is Condition Not Analyzed for Boron Dilution Event.Plant Operating Procedures Revised to Increase Shutdown Margin ML17266A2041980-05-12012 May 1980 RO 335-80-25:on 800512,during Planned Secondary Plant Cooldown/Depressurization for Turbine Steam Seal Repair, Main Steam Header Would Not Depressurize Following MSIV Closure.Apparently Caused by Mispositioned Valve ML17208A5541980-04-29029 April 1980 RO 335-80-17:on 800428,cracks Were Found to Occur at Same Location on Stainless Steel Socket Welded Elbows During Installation in Secondary Sys.Caused by Defective Fittings. All Identical Fittings Were Inspected & Found Satisfactory ML17266A1981980-04-14014 April 1980 Ro:On 800411,determination Made That Rosemount Model 1152 Pressure Transmitters,Which Actuate Containment Vacuum Relief Valves FCV-25-7 & FCV-25-8,may Be Defective.Cause Not Stated.Transmitters Will Be Replaced 1998-05-26 Category:LER) MONTHYEARML17229A7401998-05-26026 May 1998
[Table view]Special Rept:On 980507,declared Plant Meteorological Tower Ten Meter Wind Speed Indicator Inoperable Due to Loss of Indicator.Tightened Loose Ground Wire Connection & Returned Indicator to Service ML17229A4981997-10-17017 October 1997 Special Rept:On 970921,discovered That Several Heated Juction Thermocouple Inputs to Channel B of Rvlm Sys Deviating from Normal Temps.Rvlm Sys Will Be Restored to Operability Before End of Next Unit 2 Refueling Outage ML17229A4421997-08-0808 August 1997 Special Rept:On 970731,determined That Use of Conservative Min Value for Pin/Box Factor in Analysis of Record,Compared to Actual Value of Cycle 10 Min Pin/Box Factor,Introduced Conservation of .0073 in Energy Redistribution Factors ML17228B2661995-09-11011 September 1995 Special Rept:On 950812,post Hurricane Erin Beach Dune Survey Performed.Average Values of Results Greater than or within Range Provided in St Lucie Unit 1 Final Usar,Section 2.4.2.2 & Acceptable ML17228B2111995-07-0606 July 1995 Special Rept:On 950606,1A EDG Automatically Tripped on High Water Jacket Temp.Caused by Misapplication of Calibration Test Equipment for Temp Switch.Temp Switch Replaced ML17228B1761995-06-17017 June 1995 Special Rept:On 950517,1B EDG Engine Start Failure Alarm Sounded 30 Min Into Surveillance Run.Caused by Failure of One cylinder.1B EDG Declared Out of Svc.Failed Governer Assembly Replaced.Failed Assembly Sent Out for Insp ML17228A9781995-01-0909 January 1995 Special Rept:On 941214,2A Emergency Diesel Generator Failed. Caused by Excessive Clearance Between Speed Adjusting Shaft & Shaft Bushing.Electrical Maint Replaced Failed Governor/ Actuator Assembly on 2A2 EDG ML17228A9171994-11-23023 November 1994 Special Rept:On 941028,EDG Failure Occurred Due to Burned Through Wire from Magnetic Amplifier Terminal Block to Field.Wire Repaired & Relanded to Terminal Block ML17228A8521994-09-0909 September 1994 Special Rept:On 940823 & 25,RAB Exhaust Sys WRGM RM-26-90 Declared Out of Svc.Caused by Intermittment Communication Due to Power Supply Regulator Failure.Chemistry Procedure C-93 Implemented & Portable Monitor Installed ML17228A5891994-06-0202 June 1994 Special Rept:On 940504,non-valid Failure of EDG 1A Occurred Due to Spurious Actuation of High Water Jacket Temp Switch (Designated TS-59-003A).Subj Switch Replaced W/New Model 9025G & EDG 1A Declared Back in Svc on 940505 ML17228A4881994-03-0101 March 1994 Special Rept:On 920424,EDG 1B Failed Due to Failed Fan Idler Shaft.Caused by Inadequate Design.Radiation Fan Idler Shaft on Both 1A & 1B EDGs Replaced ML17228A1331993-04-19019 April 1993 Special Rept:On 930310,longitudinal Channel of Common Seismic Monitor Recorder & Indicator Declared Out of Svc & Remained Out of Svc Longer than Allowed by Ts.Util Awaiting Repairs to Instruments by Vendor ML17227A7731993-03-22022 March 1993 Special Rept:On 930307,SG Blowdown Treatment Facility Bldg Exhaust Sys Radiation Monitor Failed Functional Test & Declared Inoperable.Monitor Out of Svc for More than 72 H Due to Repair Problems.Detector Repaired & Placed in Svc ML17227A6881993-01-14014 January 1993 Special Rept:On 921208,channel 7 of Loose Parts Monitoring Sys Declared Out of Svc Due to Excessive Electrical Noise Received at Preamplifier for More than 30 Days.Complete Channel Calibr Performed.Channel 8 Still Available ML17227A6631992-12-14014 December 1992 Revised Special Rept:On 920630,DG 1A Declared Out of Svc in Order to Perform Preventive Maint on Air Start Sys.On 920701 DG Tripped Due to High Water Jacket Temp.Temp Switch TS-59-003A Replaced W/New Switch ML17227A5211992-07-27027 July 1992 Special Rept:On 920630,DG 1A Declared Out of Svc in Order to Perform Preventative Maint on Air Start Sys.Caused by Spurious Operation of Trip Which Is Bypassed in Emergency Operating Mode.Temp Switches Repaired & Reinstalled ML17227A4241992-05-14014 May 1992 Special Rept:On 920421,turbine Generator Failed to Trip Following Manual Reactor Trip.Caused by Failures in Redundant & Electrically Independent Turbine Tripping Schemes.I&C Disassembled & Trip Block Inspected ML17227A4031992-04-28028 April 1992 Special Rept:On 920403,EDG 1B Output Breaker Would Not Close During Weekly Operational Check.Caused by Failure of Underfrequency Permissive Circuit Relay.Failed Relay Replaced & EDG Successfully Started ML17227A4021992-04-24024 April 1992 In-House Event Rept 92-023:on 920421,turbine Generator Failed to Trip During Manual Reactor Trip.Root Cause Analysis Still in Progress.Solenoid Valves Removed & Sent to Independent Lab for Analysis ML17223B3931991-12-20020 December 1991 Special Rept:On 911129,emergency Diesel Generator 1B Started for Weekly Operational Check & Output Voltage Climbed Above Nominal Voltage.Caused by Failed Component in Voltage Regulator Card.Regulator Card Replaced ML17223B3201991-11-13013 November 1991 Special Rept:On 911021 & 22,1B EDG Failed During 24 Hr Surveillance Runs.First Failure Caused by Broken Shaft Due to Fatigue at High Stress Location.New Shaft,Of Modified Design,Installed.Run Performed Satisfactorily on 911027 ML17223B2401991-08-0606 August 1991 Special Rept:On 910705,valid Failure of Emergency Diesel Generator 1A Occurred.Caused by Damaged Bodine Motor. Damaged Motor Replaced ML17223B2331991-07-26026 July 1991 Special Rept:On 910626,failure of 2B Emergency Diesel Generator Occurred During post-maint Testing Following Implementation of Plant Mod.Caused by Failed Relay.Relay R1X1 Replaced ML17223B2111991-06-0606 June 1991 Special Rept:On 910513,determined That Plant Criteria for Fishkill Had Been Met.Cause of Mortality Is Insufficient Food Supply.Fish Removed & Disposed of on Site & Velocity Caps Rebuilt ML17223B1681991-04-17017 April 1991 Special Rept:On 910320,1B Emergency Diesel Generator (DG) Nonvalid Failure Occurred Due to Circuitry Failure of DG Synchronizing Circuitry.Relay Exhibiting Binding Calibr & Will Be Replaced ML17223B1051991-02-15015 February 1991 Special Rept:On 910116,troubleshooting Revealed Defective Limit Switch Assembly on 2B2 Governor of Edg.Switch Assembly Replaced & 2B EDG Successfully Retested.Sys Engineer Will Track Limit Switch for Each EDG ML17223B0571991-01-0707 January 1991 Special Rept:On 901130,loose Parts Monitor Declared Out of Svc for More than 30 Days.Caused by Presence of Large Hz Signal.Troubleshooting Efforts Will Resume on Inaccessible Areas of Sys During Next Available Opportinity ML17223A6541990-05-15015 May 1990 Special Rept:On 900405,loose Parts Detection Sys Channel out-of-svc for Greater than 30 Days.Cause of Failure Not Determined.Efforts Continuing to Identify Source of Electrical Noise & Mechanism for Induction Into Sys ML17223A5421990-03-0202 March 1990 Special Rept:On 900103,emergency Diesel Generator 2A Experienced Load Control Problems.Caused by Loose Connections in Governor Load Sensor Circuit.Loose Connections Tightened & Replacement Relay Installed ML17223A1621989-06-0505 June 1989 Special Rept:On 890406,emergency Diesel Generator 2A Failed. Caused by Thrust Bearing Failure Due to Excessive Clearance Between Bearing Collar & Fan Shaft.Cooling Fan Blades & Shroud Repaired ML17222A7711989-04-27027 April 1989 Special Rept:On 890315,diesel Tripped on High Crankcase Pressure.Caused by Engine Design.Pressure Trip Reset,But Output Breaker Failed to Close.Faulty Voltage Monitoring Relay Replaced.On 890321,same Diesel Generator Tripped ML17222A7331989-03-20020 March 1989 Special Rept:On 890117 & 0203,emergency Diesel Generators 2A & 2B Failed.Diesel Trip Caused by Engine Design.Oil Splash Guards Will Be Installed on All Plant Diesels & Step Added to ESF Test Procedure ML17221A6871988-03-25025 March 1988 Special Rept:On 880314,steam Generator Blowdown Bldg Exhaust Noble Gas Radiation Monitor Failed.Caused by Failed Central Processing Unit Processor Board.Portable Particulate,Iodine & Noble Gas Monitor Installed Until New Monitor in Place ML17221A6421988-02-19019 February 1988 Special Rept:On 880112,emergency Diesel Generator 2A Failed to Start.Caused by Failed Speed Setting Bodine Motor on 12 Cylinder Engine Governor.Motor Replaced & Generator Returned to Svc ML17221A5001987-11-0909 November 1987 Special Rept:On 871005,emergency Diesel Generator 2B Took Greater than 17 to Start Up & Load Onto Bus.Caused by Failure of Governor of Engines.Mechanical Section of Governor Replaced ML17221A4541987-10-19019 October 1987 Special Rept:On 870902,General Motors Emergency Diesel Generator Failed to Start.Caused by 12-cylinder Engine Actuator Friction Clutch Assembly Out of Adjustment.Clutch Assembly Adjusted ML17219A6741987-07-0606 July 1987 Special Rept:On 870609,personnel Discovered That Less than Required Number of Sensors in One of Two Available Reactor Vessel Level Monitoring Sys Channels Operable.Caused by Personnel Error & Deficiency in Surveillance Procedure ML17219A6661987-07-0101 July 1987 Special Rept:On 870528,city Water Tank 1B Declared Inoperable for More than 7 Days in Violation of Tech Specs to Perform Necessary Maint.Caused by Necessary Repairs to Protective Coating Sys to Prevent Further Corrosion ML17216A5551986-05-0707 May 1986 Special Rept:On 860312,alarm Received Indicating That Diesel Engine Failed to Start.Caused by Insufficient Torqued Nut. on 860326,diesel Generator Tripped on High Crankcase Pressure.Caused by Oil Splashing on Pressure Switch ML17301A1501985-01-21021 January 1985 Special Rept:On 841220,during Surveillance Run of Diesel Generator 2B While Unit Shut Down,Radiator Cooling Fan Hub Found Loosened & Cracked Circumferentially.Mod Issued to Eliminate Possibility of Set Screw Loosening ML20023C4091983-05-0909 May 1983 RO 389-83-005:on 830507,safety Injection Tank Isolation Valves Closed W/Plant in Mode 4 Above 276 Psia.Caused by Personnel Error.Procedural Step Overlooked During Plant Heatup.Valves Immediately Opened ML20011A7991981-10-26026 October 1981 RO 335-81-46:steam Generator Tube Eddy Current Test Performed in Ctr Area of B Steam Generator to Confirm Leak Located by Helium Test.Cause Not Stated.Testing of Rows 1-18 Will Be Completed within 2 to 3 Days ML17266A4521981-04-24024 April 1981 RO 335-81-19:on 810410,notification Made to NRC of Analyses Utilizing FSAR Assumptions for Certain Postulated Accidents Using Assumption That Reactor Coolant Pressure Tripped Upon Receipt of Sias.Item Determined Not Reportable ML17209A7121980-12-19019 December 1980 RO 80-003:on 801202,ocean Intake Area Recording Thermograph Sys Reported Lost.Probably Caused by Storm Surge Wave Action or Commercial Fishing.Sys Replaced on 801210 ML20003B6641980-12-19019 December 1980 Nonroutine Environ Operating Rept 335-B-80-03:on 801202, Ocean Intake Area Recording Thermograph Sys Was Reported Missing.Probably Caused by Storm Surge Wave Action or Commercial Fishing.Sys Was Replaced on 801210 ML17266A2161980-06-11011 June 1980 RO 335-80-29:on 800611,ground Occurred on Bus 1B Dc Causing Containment Isolation Valve HCV-14-6 to Fail Closed. Apparently Caused by Water in Solenoid from Steam Leak. Cooldown Continuing.Damaged Valve Seals Will Be Replaced ML17266A2111980-05-15015 May 1980 RO 335-80-27:on 800514,C-E Informed Util That Partial Draining of RCS While in Mode 5 Is Condition Not Analyzed for Boron Dilution Event.Plant Operating Procedures Revised to Increase Shutdown Margin ML17266A2041980-05-12012 May 1980 RO 335-80-25:on 800512,during Planned Secondary Plant Cooldown/Depressurization for Turbine Steam Seal Repair, Main Steam Header Would Not Depressurize Following MSIV Closure.Apparently Caused by Mispositioned Valve ML17208A5541980-04-29029 April 1980 RO 335-80-17:on 800428,cracks Were Found to Occur at Same Location on Stainless Steel Socket Welded Elbows During Installation in Secondary Sys.Caused by Defective Fittings. All Identical Fittings Were Inspected & Found Satisfactory ML17266A1981980-04-14014 April 1980 Ro:On 800411,determination Made That Rosemount Model 1152 Pressure Transmitters,Which Actuate Containment Vacuum Relief Valves FCV-25-7 & FCV-25-8,may Be Defective.Cause Not Stated.Transmitters Will Be Replaced 1998-05-26 Category:TEXT-SAFETY REPORT MONTHYEARML17241A4891999-10-0707 October 1999
[Table view]LER 99-004-00:on 990912,noted That MSSV Surveillance Was Outside of TS Requirements.Caused by Setpoint Drift.Subject MSSVs Are Being Refurbished & Retested Prior to Unit Startup from SL1-16 Refueling Outage.With 991007 Ltr ML17241A4951999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for St Lucie,Units 1 & 2.With 991014 Ltr ML17241A4741999-08-31031 August 1999 Rev 1 to PCM 99016, St Lucie Unit 1,Cycle 16 Colr. ML17241A4591999-08-31031 August 1999 Monthly Operating Repts for Aug 1999 for St Lucie,Units 1 & 2.With 990913 Ltr ML17241A4301999-07-31031 July 1999 Monthly Operating Repts for Jul 1999 for St Lucie Units 1 & 2.With 990805 Ltr ML17241A4111999-07-16016 July 1999 LER 99-007-00:on 990610,unplanned Cooldown Transient Occurred Due to Personnel Error.Trained & Briefed Personnel & Revised Procedures.With 990716 Ltr ML17241A4031999-07-0606 July 1999 LER 99-006-00:on 990605,sub-critical Reactor Trip Occurred Due to Inadvertent MSIV Opening.Caused by Personnel Error. Provided Operation Supervision Instruction to Operating Crews,Stand Down Meetings & Operator Aids.With 990706 Ltr ML17241A4041999-07-0606 July 1999 LER 99-005-00:on 990604,CEA Drop Resulted in Manual Reactor Trip.Caused by Procedural Inadequacies.Procedure Changes Are Planned to Correct Lack of Procedural Guidance for CEA Subgroup Power Switch Replacement.With 990706 Ltr ML17241A4091999-06-30030 June 1999 Monthly Operating Repts for June 1999 for St Lucie,Units 1 & 2.With 990712 Ltr ML17241A3941999-06-30030 June 1999 LER 99-004-01:on 990415,as Found Cycle 10 Psv Setpoints Were Outside TS Limits.Caused by Manufacturing Process Defect. All Three Psvs Were Replaced with pre-tested Valves During Cycle 11 Refueling Outage.With 990630 Ltr ML17355A3681999-06-30030 June 1999 Revised Update to Topical QA Rept, Dtd June 1999 ML17241A3551999-06-0404 June 1999 LER 99-002-00:on 990505,both Trains of Safety Injection Actuation Were Blocked During Surveillance.Caused by Procedure Error.Procedure Revised.With 990604 Ltr ML17241A3631999-05-31031 May 1999 Monthly Operating Repts for May 1999 for St Lucie Units 1 & 2.With 990610 Ltr ML17241A3321999-05-17017 May 1999 LER 99-004-00:on 990415,determined That as Found Cycle 10 Psv Setpoints Outside TS Limits.Root Cause Under Investigation.Psvs Replaced with pe-tested Valves During Cycle 11 ML17241A3271999-05-0606 May 1999 LER 99-003-00:on 990406,ECCS Suction Header Leak Resulted in Both ECCS Trains Being Inoperable & Entry Into TS 3.0.3. Caused by Chloride Induced OD Stress Corrosion Cracking of Piping.Made Code Repairs & Coated Piping.With 990506 Ltr ML17241A3331999-04-30030 April 1999 Monthly Operating Rept for Apr 1999 for St Lucie,Units 1 & 2.With 990517 Ltr ML17229B0801999-04-0707 April 1999 LER 99-002-00:on 990311,SG ECT Error Caused Operation with Condition Prohibited by Ts.Caused by Deficiencies in Data Analysis Guideline Instructions.Licensee Will Change Data Analysis Guidelines for Lead Analysts.With 990407 Ltr ML17229B0841999-04-0707 April 1999 Rev 2 to PSL-ENG-SEMS-98-102, Engineering Evaluation of ECCS Suction Lines. ML17229B0791999-04-0707 April 1999 LER 99-001-00:on 990309,discovered Inadequate Design & IST SRs for Iodine Removal Sys (Irs).Caused by Original Design Inadequacies & Personnel Error.Naoh Tank Vent Valve V07233 Was Tagged Open.With 990407 Ltr ML17229B0961999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for St Lucie,Units 1 & 2.With 990408 Ltr ML17229B0541999-03-10010 March 1999 LER 99-001-00:on 990211,inadequate TS SRs for SIT & SDC Isolation Valves Were Noted.Caused by Failure to Correctly Implement TS Srs.Submitted LAR to Align Required TS SR with Design Bases Requirements Being Verified.With 990310 Ltr ML17229B0461999-02-28028 February 1999 Monthly Operating Repts for Feb 1999 for St Lucie,Units 1 & 2.With 990310 Ltr ML17229B0051999-01-31031 January 1999 Monthly Operating Repts for Jan 1999 for St Lucie,Units 1 & 2.With 990211 Ltr ML17229A9901999-01-20020 January 1999 LER 98-009-00:on 981223,noted That Facility Operated Outside of Design Basis.Caused by non-conservative MSLB Analysis Inputs.Will Review SR Component Differences Between Units & Will re-baseline LTOP Analysis.With 990120 Ltr ML17229A9961999-01-14014 January 1999 SG Tube Inservice Insp Special Rept. ML17229A9821999-01-0404 January 1999 LER 98-010-00:on 981207,RCS Boron Sample Frequency Required by Ts,Was Exceeded by Twelve Minutes.Caused by Personnel Error.Equipment Clearance Order Was Lifted to Draw Required Sample & Operations Procedure Was Changed.With 990104 Ltr ML17229A9831998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for St Lucie,Units 1 & 2.With 990111 Ltr ML17229A9611998-12-22022 December 1998 LER 97-002-01:on 981204,containment Sump Debris Screen Was Not IAW Design.Caused by Inadequate C/As for Sump Screen Anamolies.All Identified Sump Screen Deficiencies Were Dispositioned &/Or Repaired.With 981222 Ltr ML17229A9561998-12-15015 December 1998 LER 98-008-00:on 981118,missed TS SG U Tube Insp.Caused by Encoding Errors While Using Remote Positioning Fixtures.All SG Tube Surveyed.With 981215 Ltr ML17241A3581998-12-0909 December 1998 Changes,Tests & Experiments Made as Allowed by 10CFR50.59 for Period of 970526-981209. ML17229A9421998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for St Lucie,Units 1 & 2.With 981215 Ltr ML17229A9301998-11-25025 November 1998 LER 98-005-01:on 980807,discovered That New MOV Methodology Caused Past PORV Block Valve Operability Problem.Caused by Inadequacies in Original Vendor MOV Methodology.Planned Valve Mods Will Be Implemented During Cycle 11 1998 Outage ML17229A9021998-11-0404 November 1998 LER 98-008-00:on 981008,inadequate Reactor Protection Sys Trip Bypass TS Was Noted.Caused by Poorly Worded Ts. Submitted LAR to Clarify Power Requirements for High Rate of Power Trips.With 981104 Ltr ML17241A4931998-11-0101 November 1998 Statement of Account for Period of 981101-990930 for Suntrust Bank,As Trustee for Florida Municipal Power Agency Nuclear Decommissioning Trust (St Lucie Project). ML17229A9051998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for St Lucie,Units 1 & 2.With 981110 Ltr ML17229A8871998-10-19019 October 1998 Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1 Which Was Machined with Improper Length.C/A Includes Insp Equipment That Will 100% Identify Short Length ML17229A8781998-10-19019 October 1998 Part 21 Rept Re Potential Defect in Swagelok Stainless Steel Front Ferrule,Part Number SS-503-1,which Was Machined with Improper Length.Insp Equipment That Will 100% Identify Short Length ML17229A8771998-10-14014 October 1998 LER 98-006-00:on 980918,inadvertent Afas Actuation Was Noted.Caused by Degradation of Multiple Afas Power Supplies. Replaced Afas Power Supplies & Revised Procedures.With 981014 Ltr ML17229A8761998-10-14014 October 1998 LER 98-007-00:on 980918,identified Discrepancies Between Fire Protection Design Requirements & Field Conditions. Caused by Inadequate Translation & Implementation of Fire Protection Requirements.Procedures Revised.With 981014 Ltr ML17229A8721998-09-30030 September 1998 Monthly Operating Repts for Sept 1998 for St Lucie Units 1 & 2.With 981009 Ltr ML17229A8511998-09-0202 September 1998 LER 98-005-00:on 980807,discovered That PORV Margins Were Insufficient to Accommodate Addl Conservatism.Caused by Inadequacies in Original Vendor MOV Methodology.Will Implement Planned Valve Actuator mods.W/980902 Ltr ML17229A8611998-08-31031 August 1998 Monthly Operating Repts for Aug 1998 for St Lucie,Units 1 & 2.With 980911 Ltr ML18066A2771998-08-13013 August 1998 Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency ML17229A8481998-08-0707 August 1998 Rev 1 to PSL-ENG-SEFJ-98-013, St Lucie Unit 2,Cycle 10 Colr. ML17229A9461998-08-0707 August 1998 Rev 0 to PCM 98016, St Lucie Unit 2,Cycle 11 Colr. ML17229A8301998-07-31031 July 1998 Monthly Operating Repts for July 1998 for St Lucie,Units 1 & 2.W/980814 Ltr ML17229A8201998-07-29029 July 1998 LER 98-007-00:on 980630,inadequate Procedure May Have Resulted in SBO Recovery Complications.Caused by Inadequate Procedures.Attached Caution Tags to Appropriate Control switches.W/980729 Ltr ML17229A7981998-06-30030 June 1998 Monthly Operating Repts for June 1998 for St Lucie,Units 1 & 2.W/980713 Ltr ML17229A7701998-05-31031 May 1998 Monthly Operating Repts for May 1998 for St Lucie,Units 1 & 2.W/980612 Ltr ML17229A7411998-05-28028 May 1998 LER 98-004-00:on 980430,discovered Waste Gas Decay Tank Operation W/O Available Oxygen Analyzers,Which Is Prohibited by Ts.Caused by Inadequate Licensee Review of License Amend. Oxygen Analyzer recalibrated.W/980528 Ltr 1999-09-30 |
Text
REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9111200215DOC.DATE:91/11/13NOTARIZED:NOFACIL:50-335St.LuciePlant,Unit1,FloridaPower6LightCo.AUTH.NAMEAUTHORAFFILIATIONSAGER,D.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
SUBJECT:
Specialrept:on911021622,1BEDGfailedduring24hrsurveillanceruns.Firstfailurecausedbybrokenshaftduetofatigueathighstresslocation.Newshaft,ofmodifieddesign,installed.24hrrunperformedsatisfactorily911027.D*s>>@~~*a~<<D~:p2>>C>>*~a~<<~>>~D:>>~I~~~L~TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:DOCKET05000335RECIPIENTIDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACNWAEOD/DOAAEOD/ROAB/DSPNRR/DET/EMEB7ENRR/DLPQ/LPEB10NRR/DREP/PRPB11NRR/DST/SICBSH3NRR/DST/SRXBSERES/DSIR/EIBEXTERNAL:EGGGBRYCE,J.HNRCPDRNSICPOORE,W.COPIESLTTRENCL1111221122111122111111331111RECIPIENTIDCODE/NAMEPD2-2PDACRSAEOD/DSP/TPABNRR/DET/ECMB9HNRR/DLPQ/LHFB10NRR/DOEA/OEABNRR/DST/SELBSDPLBSD102RGN2FILE01LSTLOBBYWARDNSICMURPHY,G.ANUDOCSFULLTXTCOPIESLTTRENCL11221111111111111111111111DNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR33ENCL33 P.O.Box128,Ft.Pierce,FL34S54-0128oVfgpgL-91-31010CFR50.36U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,DC20555Gentlemen:Re:St.LucieUnit1DocketNo.50-335SpecialReportDateofEvents:October21and22,1991EmerencDieselGeneratorFailuresTheattachedSpecialReportisbeingtransmittedpursuanttotherequirementofSt.LucieUnit1TechnicalSpecifications4.8.1.2.2and6.9.2.Thisreportprovidesnotificationoftwofailuresassociatedwiththe1BEmergencyDieselGeneratorduringthe24hoursurveillanceruns.Shouldtherebeanyquestionsonthisinformation,pleasecontactus~Verytrulyyours,D.A.SagerPlantVicePresidentDAS/JWH/kwAttachmentcc:StewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlantDAS/PSL4550-91gpZPlii2002l55'il.ij.=.r"DR(ADOCki05000='35PDRc(-~!pranFPLGroupcompany
~Fir~Fjiilir",SpecialReport18EmergencyDieselGeneratorFailuresSt.LucieUnit1wasinMode5andbeginningarefuelingoutage.At0357onOctober21,1991,the1BEmergencyDieselGenerator(EDG)wasstartedforits24hoursurveillancerun.TheEDGautomaticallytrippedat0928onhighdischargewatertemperature.Theradiatorfanidlerpulleyshaftwasfoundtobesheared.Analysisshowedthatthebrokenshaftwascausedbyfatigueatahighstresslocation.Anewshaft,ofamodifieddesign,wasinstalled.Thenewshaftismadeofadifferentmaterialandhasreducedstressrisersattheshaftdiameterstepstoincreaseshaftfatigueresistance.Thissurveillancerunwasafailureofavalidtest.RG1.108$2.a.3requiresatesttobeperformedatleastoncepereighteenmonthstodemonstratefull-load-carryingcapacityforanintervalofnotlessthan24hours.TheEDGranfiveandone-halfhoursbeforetripping.nF,ilrThe1BEDGwasrestartedat2035onOctober22,1991.Theradiatorfanbeltswerefoundtobeflappingexcessively.PlantmanagementdecidedtoshutdowntheEDGtodeterminethecauseoftheexcessiveflapping.TheEDGwasstoppedat0931onOctober23.Crackswerefoundonthefandrivebeltbearingsupportframe.EvaluationofthestructurerevealedanaturalfrequencyatthethirdharmonicoftheEDGrotationalspeed.Thepresenceofexcitationforcesnearthenaturalfrequencyofthestructureexplainsthereducedlifeoftheidlershaftandsupportingframe.Theexcitationisproducedbythetorsionaloscillationfromthe12cylinderEDG.Toincreasetheservicelifeofthefancomponentsandassociatedsupportstructure,thecrackswererepairedandstiffenerplateswereinstalled.Theseactionswereperformedonboththe1Aand1BEDGs.Futureplansaretoinstallvibrationisolatorsonthe1Aand1BEDGpowertakeoffshafts.TheseisolatorsgreatlyreducetheamplitudeoftorsionalvibrationsbeingtransmittedtothefanassemblyframeandhaveproventobebeneficialonSt.LucieUnit2EDGs.Thislong-termcorrectiveactionwillbeevaluatedforimplementationduringthenextrefuelingoutage.ThesurveillancerunstartedonOctober22wasalsoafailureofavalidtest.RG1.108g2.e.7statesthattestsperformedtoverifycorrectionoftheproblemshouldbeconsideredvalidtestsandsuccessesorfailures,asappropriate.Filure,immThesefailureswerethefirstandsecondfailuresofthe1BEDGsinceimplementationoftheRG1.108-basedTechnicalSpecifications.Todate,twentyvalidtestshavebeenperformed.ThecurrentsurveillanceintervalisoncepersevendaysperTechnicalSpecification4.8.1.1.The24hourrunwasperformedsatisfactorilyfrom2001onOctober27to2011October28,1991.
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