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| Issue date | Title | Topic | |
|---|---|---|---|
| ML17229A740 | 26 May 1998 | 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 | |
| ML17229A498 | 17 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 | |
| ML17229A442 | 8 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 | |
| ML17228B266 | 11 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 | |
| ML17228B211 | 6 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 | |
| ML17228B176 | 17 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 | |
| ML17228A978 | 9 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 | Power change |
| ML17228A917 | 23 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 | |
| ML17228A852 | 9 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 | |
| ML17228A589 | 2 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 | |
| ML17228A488 | 1 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 | |
| ML17228A133 | 19 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 | Earthquake |
| ML17227A773 | 22 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 | |
| ML17227A688 | 14 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 | |
| ML17227A663 | 14 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 | |
| ML17227A521 | 27 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 | |
| ML17227A424 | 14 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 | |
| ML17227A403 | 28 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 | |
| ML17227A402 | 24 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 | |
| ML17223B393 | 20 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 | |
| ML17223B320 | 13 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 | |
| ML17223B240 | 6 August 1991 | Special Rept:On 910705,valid Failure of Emergency Diesel Generator 1A Occurred.Caused by Damaged Bodine Motor. Damaged Motor Replaced | |
| ML17223B233 | 26 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 | |
| ML17223B211 | 6 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 | |
| ML17223B168 | 17 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 | |
| ML17223B105 | 15 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 | |
| ML17223B057 | 7 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 | |
| ML17223A654 | 15 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 | |
| ML17223A542 | 2 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 | |
| ML17223A162 | 5 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 | |
| ML17222A771 | 27 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 | |
| ML17222A733 | 20 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 | |
| ML17221A687 | 25 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 | |
| ML17221A642 | 19 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 | |
| ML17221A500 | 9 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 | |
| ML17221A454 | 19 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 | |
| ML17219A674 | 6 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 | |
| ML17219A666 | 1 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 | |
| ML17216A555 | 7 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 | |
| ML17301A150 | 21 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 | |
| ML20023C409 | 9 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 | |
| ML20011A799 | 26 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 | |
| ML17266A452 | 24 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 | |
| ML17209A712 | 19 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 | |
| ML20003B664 | 19 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 | |
| ML17266A216 | 11 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 | |
| ML17266A211 | 15 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 | Shutdown Margin |
| ML17266A204 | 12 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 | |
| ML17208A554 | 29 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 | Liquid penetrant |
| ML17266A198 | 14 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 |