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 Issue dateTitleTopic
ML17206A50819 October 1978RO#335-B-78-05 on 780921 Re Discharge Zone of mixing- Recording Thermographs.Cable Holding Thermograph Buoy Came Unattached from Anchor.Caused by Fisherman Tampering & Collision with Boats
ML17206A53116 November 1978Reportable Occurrence on 781027:Technician Responsible Could Not Find Thermographs or Marker Buoys Contrary to Environ Tech Spec 3.1.A.6 Buoy & Thermograph Found on Beach Possibly Taken by Vandels.Buoy Already Replaced
ML17206A63919 January 1979RO 335-B-79-01 on 790105:thermograph Was Displaced from Monitoring Location.Buoy Support Broke During Storm.Buoy Was Replaced & Thermographs Were Installed
ML17206A64218 January 1979RO 335-B-78-09 on 781227:condenser Temp Rise in Excess of 24 F.Cause Described in Previous RO-335-78-03,04,07 & 08. Awaiting Licensing Action on Request to Allow Condenser Temp Limit to Be Increased to 265 F
ML17206A74411 April 1979RO 335-B-79-02 on 790314:during Regular Chart Changes & Calibr,Zone Mixing Surface Temp Rises Were Noted in Excess of 5.5 F.Caused by Inherent Difficulties in Determining Real Temp Differences in Ocean
ML17206A83925 May 1979RO 335-79-16 on 790523:four Restraints Were Misplaced on 4-inch & 8-inch Component Cooling Water Lines.Four Restraints Will Be Properly Installed Before Startup from Present Refueling Shutdown
ML17207A71212 December 1979RO 335-B-79-04:on 791113,during Routine Checks of Ocean Intake Recording Thermographs,Discovered That Thermographs, Mounting Array & Intake Flotation Buoy Were Missing.Cause Unknown.Hardware Replaced 791207
ML17207A80825 January 1980RO 335-80-4:on 800124,feeder Breaker from Startup Transformer B to 4160-volt Vital Bus B Was Open.Caused by Improperly Labeled Breaker.Breaker Cubicles a & B Were Locked & Are Checked Daily
ML17208A37312 March 1980RO 335-B-80-01:on 800212,site Analysis of Thermograph Data Indicated Surface Temp Rise,In Area of Max Ocean Temp,In Excess of 5.5 F on 800113.Possibly Caused by Thermograph Malfunction.Thermograph Returned to Vendor
ML17208A55429 April 1980RO 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 SatisfactoryLiquid penetrant
ML17209A71219 December 1980RO 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
ML17216A5557 May 1986Special 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
ML17219A6661 July 1987Special 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
ML17219A6746 July 1987Special 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
ML17221A45419 October 1987Special 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
ML17221A5009 November 1987Special 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
ML17221A64219 February 1988Special 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
ML17221A68725 March 1988Special 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
ML17222A73320 March 1989Special 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
ML17222A77127 April 1989Special 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
ML17223A1625 June 1989Special 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
ML17223A5422 March 1990Special 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
ML17223A65415 May 1990Special 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
ML17223B0577 January 1991Special 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
ML17223B10515 February 1991Special 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
ML17223B16817 April 1991Special 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
ML17223B2116 June 1991Special 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
ML17223B23326 July 1991Special 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
ML17223B2406 August 1991Special Rept:On 910705,valid Failure of Emergency Diesel Generator 1A Occurred.Caused by Damaged Bodine Motor. Damaged Motor Replaced
ML17223B32013 November 1991Special 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
ML17223B39320 December 1991Special 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
ML17227A40224 April 1992In-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
ML17227A40328 April 1992Special 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
ML17227A42414 May 1992Special 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
ML17227A52127 July 1992Special 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
ML17227A66314 December 1992Revised 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
ML17227A68814 January 1993Special 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
ML17227A77322 March 1993Special 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
ML17228A13319 April 1993Special 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 VendorEarthquake
ML17228A4881 March 1994Special 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
ML17228A5892 June 1994Special 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
ML17228A8529 September 1994Special 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
ML17228A91723 November 1994Special Rept:On 941028,EDG Failure Occurred Due to Burned Through Wire from Magnetic Amplifier Terminal Block to Field.Wire Repaired & Relanded to Terminal Block
ML17228A9789 January 1995Special 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 EDGPower change
ML17228B17617 June 1995Special 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
ML17228B2116 July 1995Special 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
ML17228B26611 September 1995Special 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
ML17229A4428 August 1997Special 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
ML17229A49817 October 1997Special 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
ML17229A74026 May 1998Special 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