Category:LICENSEE EVENT REPORT (SEE ALSO AO
MONTHYEARML20045J0111993-07-14014 July 1993 LER 93-015-00:on 930614,1A Start Bus Alternate Feeder Breaker Tripped Upon Start of Unit 1 RCP Which Resulted in Start of DG Due to Current Transformer Wired Incorrectly. Restored Offsite Power & Secured Final DG.W/930714 Ltr ML20045B9311993-06-10010 June 1993 LER 93-013-00:on 930514,fire Watch Was Not Performed within Time Frame Required by Tech Specs Due to Inadequate Supervision by Fire Protection Foreman.Fire Watch Patrol reestablished.W/930610 Ltr ML20045A7261993-06-0707 June 1993 LER 93-011-00:on 930507,discovered That Fire Barrier Breached W/O Proper Compensatory Measures Established.On 930505,door Leading to Room Housing Containment Spray HX 1A Breached.Roving Fire Watch Established & LCO 3.7.12 Entered ML20029C1761991-03-21021 March 1991 LER 91-002-00:on 910211,unit Operated in Condition Prohibited by Tech Spec 3.3.3.8 Limiting Condition for Operation.Cause Under Investigation.Night Order Issued to Personnel Re Removal of Equipment from svc.W/910321 Ltr ML20029A6711991-02-25025 February 1991 LER 91-002-00:on 910124,LCOs 3.0.5 & 3.8.1.1 Entered When Both Trains of Emergency Gas Treatment Sys Declared Inoperable.Caused by Blown Fuse & Excessive Cycling of Air Start Sys.Fuse replaced.W/910225 Ltr ML20043A4211990-05-16016 May 1990 LER 90-010-00:on 900416,containment Ventilation Isolation Occurred.Caused by Allowing Gaseous Radiation Level to Increase Too Close to Alarm Setpoint.Recovery from Isolation initiated.W/900516 Ltr ML20043A2201990-05-14014 May 1990 LER 90-007-00:on 900413,discovered That Tech Spec Surveillance Requirement Not Performed within Required Interval.Caused by Personnel Error.Surveillance Successfully Performed Since missed.W/900514 Ltr ML20043A2261990-05-14014 May 1990 LER 90-009-00:on 900404,lower Containment Radiation Monitor Found Inoperable & Lower Containment Atmosphere Aligned to Upper Containment Radiation Monitor During Sampling.Caused by Personnel Error.Chemistry Training revised.W/900514 Ltr ML19354D8941990-01-16016 January 1990 LER 89-034-00:on 891215,leak Identified from Fitting on Vol Control Tank Level Transmitter & Auxiliary Bldg Evacuated, Preventing Fire Watch Patrol from Entering Bldg for Hourly Rounds.Fitting tightened.W/900116 Ltr ML20005E0801989-12-22022 December 1989 LER 89-032-00:on 891205,RHR Pumps Determined to Have Deadheading Problem,Per NRC Bulletin 88-004,resulting in Plant Operation Outside Design Basis.On 891128,RHR Pump Exceeded Head Criteria.Pumps started.W/891222 Ltr ML20005E0831989-12-22022 December 1989 LER 89-032-00:on 891201,discovered That Tech Spec Surveillance Requirement to Verify That Valves 1-67-748 & 2-67-748 in Open Position Not Met.Caused by Personnel Error.Correct Valve Position verified.W/891222 Ltr ML20005E1991989-12-20020 December 1989 LER 89-029-00:on 891121,spurious Train B Control Room Isolation Occurred.Caused by Accidental Bumping of Relays & Degraded Fuse in Circuit.Fuses Replaced & Relays Removed & replaced.W/891220 Ltr ML20005D7351989-12-0707 December 1989 LER 89-026-00:on 891107,Limiting Condition for Operation 3.0.3 Entered as Result of More than One Rod Position Indicator (RPI) Per Bank Being Inoperable.Caused by Lack of Preventive Maint.Rpis adjusted.W/891207 Ltr ML19332C4971989-11-22022 November 1989 LER 89-027-00:on 891027,spray &/Or Sprinkler Sys Declared Inoperable as Result of Failure to Perform Surveillance Requirement within Required 18-month Frequency.Caused by Inadequate Procedure.Procedure revised.W/891122 Ltr ML19327B5461989-10-23023 October 1989 LER 89-011-01:on 890823,discovered That Requirement to Source Check Radioactive Gaseous Effluent Monitors Not Met. Caused by Previous Lack of Emphasis on Requirements Recognition.Monitors Source checked.W/891023 Ltr ML19325D2481989-10-13013 October 1989 LER 89-013-00:on 890914,found That Min Number of Operable Photoelectric Fire Detectors Not Maintained for Zone 374. Caused by Identification & Ordering of Incorrect Replacement Fire Detectors.Hourly Fire Watch established.W/891013 Ltr ML19325C5681989-10-12012 October 1989 LER 89-012-00:on 890912,reactor Vessel Level Instrumentation Sys Level Indicator Failed Monthly Channel Check & Declared Inoperable.Caused by Inadequate Training for Two Craft Personnel That Performed vlave.W/891012 Ltr ML20024F1811983-09-0202 September 1983 LER 83-108/03L-0:on 830806,08 & 09,RCS Subcooling Margin Monitor Declared Inoperable Due to Loss of Plant Computer. Caused by Faulty Memory Card A707 in Digital Input Demultiplexer Due to Shorted Zener diode.W/830902 Ltr ML20024C2201983-06-28028 June 1983 LER 83-077/03L-0:on 830531,auxiliary Feedwater Automatic Valve 1-PCV-3-122 Declared Inoperable.Caused by Clogged Hydraulic Moog Valve & Hydraulic Pump Motor Failure Due to High Amperage.Valve,Pump & Motor replaced.W/830628 Ltr ML20024C1091983-06-27027 June 1983 LER 83-081/03L-0:on 830529,upper Containment Outer Airlock Door Found Broken.Caused by Two Failed Operating Machanism Cam Follower Bearings,Due to Normal Wear,Heavy Use & Improper Maint During Const.Bearings replaced.W/830627 Ltr ML20023D3791983-05-0303 May 1983 LER 83-056/01T-0:on 830503,upper Containment Airlock Inner Door Discovered Inoperable.Caused by Sheared Stud & Failed Cam Follower Bearing on Latching Mechanism.Mechanism Repaired & Returned to Svc ML20023B6351983-04-27027 April 1983 LER 83-046/03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc ML20023B5851983-04-27027 April 1983 LER 83-047/03L-0:on 830409,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Memory Parity Error.Computer Restarted & Monitor Restored ML20028B6251982-11-29029 November 1982 LER 82-130/03L-0:on 820928,during Routine Performance of Surveillance Instruction 106,group 1,rows 1 & 2 Min Average Ice Weight Less than Required.Caused by Sublimation of Ice in Crane Wall Area.Ice Added ML20027A9801982-09-0808 September 1982 LER 82-105/03L-0:on 820810,while in Mode 1,one Refueling Water Storage Tank Failed Low & Declared Inoperable.Caused by Faulty Amplifier Card.Transmitter Replaced & Loop Returned to Svc ML20052H6711982-05-14014 May 1982 LER 82-053/03L-0:on 820415,vital Battery Bank II Declared Inoperable When Cell 4 Connection Resistance Found Greater than 150 micro-ohms.Caused by Loose Bolt Connection.Bolt Torqued & Resistance Checked ML20052H4481982-03-29029 March 1982 LER 82-032/03L-0:on 820228,rod Position Indicator M-4 on Control Bank D Declared Inoperable When Indication Dropped to Zero.Caused by Defective Connector.Spare Connector Being Used Until Defective Connector Repaired ML20050C4261982-03-23023 March 1982 LER 82-026/03L-0:on 820221,containment Sump Level Transmitter 2-LT-65-176 Inoperable Due to High Readings. Caused by Leaking Sensor Bellows.Sensor Bellows Replaced & Transmitter Recalibr ML20050C4031982-03-19019 March 1982 LER 82-025/03L-0:on 820212,pressurizer Level Channel 1-LT-68-335 Declared Inoperable.Caused by Transmitter Out of Calibr Due to Instrument Drift.Barton Model 764 Transmitter Recalibr ML20050A9881982-03-15015 March 1982 LER 82-028/03L-0:on 820214 & 15,in Mode 3,cold Leg Accumulator 4 Declared Inoperable Due to Low Boron Concentration.Caused by Leak Through in Flow Control Leak Test & Fill Line Valves.Five Valves Investigated & Repaired ML20050A8411982-03-12012 March 1982 LER 82-022/03L-0:on 820213,during Surveillance Testing, Lower Containment Airlock Inner Door Was Declared Inoperable.Caused by Braces Being Torqued Too Tight.Seals Reset & Surveillance Procedure Revised ML20041F8741982-03-0808 March 1982 LER 82-018/03L-0:on 820207,during Startup,Containment Lower Compartment Average Air Temp Discovered at 124.19 F.Two Lower Compartment Train a Coolers Temp Control Valves Had Wrong Settings.Cause Unknown ML20049J5291982-03-0202 March 1982 LER 82-021/01T-0:on 820217,during Startup,Shutdown Rods in Shutdown Bank a Exceeded Plus/Minus 12 Steps of Actual Position on Indicators.Caused by Misinterpretation of Limiting Condition for Operation 3.1.3.3.Rods Recalibr ML20041A5871982-02-10010 February 1982 LER 82-006/03L-0:on 820115,turbine Driven Auxiliary Feedwater Pump Declared Inoperable Due to Failure to Meet Surveillance Requirements.Caused by Malfunction in Controller 1-FIC-46-57.Controller Replaced ML20041A5691982-02-10010 February 1982 LER 82-005/03L-0:on 820113,remote Shutdown Instrument Channel or Pressurizer Relief Tank Level Declared Inoperable Due to Failure to Meet Surveillance Requirements Caused by Faulty Resistor in Transmitter Circuit Card ML20040G6321982-02-0505 February 1982 LER 82-007/03L-0:on 820108,in Mode 1 at 100% Power,Rod Position Indicator P-4 (Shutdown Bank a) Indicated Greater than 12 Steps Below Step Counter.Defective Indicator Recalibr & Returned to Svc.Connector Pins Cleaned ML20040F7861982-01-22022 January 1982 LER 81-156/03L-0:on 811226,turbine Stop Throttle Valve 3 Declared Inoperable Due to Faulty Limit Switch.Caused by Switch Sticking,Resulting in Inaccurate Signal.Limit Switch Adjusted & Lubricated ML20040C7221982-01-20020 January 1982 LER 81-157/03L-0:on 811222,pressurizer Level Transmitter 1-LT-68-335 Declared Inoperable Due to Failure to Meet Channel Check Requirements.Caused by Accumulation of Gases in Condensate Reservoirs & Sensor Bellows.Gases Vented ML20040F8601982-01-19019 January 1982 LER-81-158/03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested ML20040C7381982-01-19019 January 1982 LER 81-151/03L-0:on 811221,w/unit in Mode 1,one Containment Sump Level Transmitter Declared Inoperable Due to Erratic High Readings.Caused by Instrument Drift.Instrument Recalibr ML20040B7471982-01-15015 January 1982 LER 81-154/03L-0:on 811219,damaged Signal Cables Found on Refueling Water Storage Tank Level Transmitter.Caused by Excessive Heat While Attempting to Thaw Frozen Sensing Lines.Cables Repaired.Transmitter Replaced ML20039C5191981-12-17017 December 1981 LER 81-145/03L-0:on 811118,motor Leads on 1FCV-63-6 Were Discovered Lifted During Quarterly Running of SI-166.1. Probably Caused by Mistake on Data Sheet Signoff & Failure to Reterminate Leads ML20039A5651981-12-10010 December 1981 LER 81-134/03L-0:on 811111,relay Contacts for Fire Zone 367 Reactor Coolant Pump 3 Found Wired Normally Closed.Correct Configuration Is Normally Open.Caused by Error in Connection Drawings.Connection Drawings Revised ML20039A5701981-12-0404 December 1981 LER 81-126/03L-0:on 811105,nuclear Instrumentation Sys Power Range Channel III (N-43) Declared Inoperable.Caused When Instrument Power Fuse Was Inadvertently Pulled Instead of Control Power Fuse.Procedures Revised ML20038C8521981-12-0404 December 1981 LER 81-138/03L-0:on 811106,w/RCS Temp & Pressure at 547 F & 2235 Psig,Respectively,High Thrust Bearing Temp Indicated on Pump 1.Pump Stopped.Motor Inspected.No Abnormal Mechanical Conditions Found.Cause Due to Defective Conductor ML20011B0251981-10-23023 October 1981 LER 81-121/03L-0:on 810925,flux Imbalance Penalty Function Generator XM-92-5005K Found Inoperable.Caused by Module Drift.Module Recalibr ML20010J3821981-09-22022 September 1981 LER 81-108/03L:on 810825,during Performance of SI-159.1, Lower Containment Airlock Failed to Meet Leak Rate Acceptance Criteria.Caused by Loose Gland Nut on Hand Wheel Shaft.Nut Tightened & Airlock Tested ML20005A5311981-06-23023 June 1981 LER 81-063/03L-0:on 810525,w/unit at 99% Power,Containment Hydrogen Analyzer 1-43-210 Was Found Out of Tolerance During Performance of Scheduled Surveillance Test.Reagent Flow Readjusted to Bring Analyzer Into Tolerance ML20004D5611981-06-0303 June 1981 LER 81-054/03L-0:on 810506,chlorine Analyzer 43-205A Was Declared Inoperable Due to Insufficient Electrolyte Drip Rate.Caused by Electrolyte Becoming Stopped Up in Felt Filter.Filter Removed,Cleaned,Reinstalled & Adjusted ML20004D5811981-06-0101 June 1981 LER 81-055/03L-0:on 810504,waste Gas Decay Tank E Was Found to Have Oxygen Concentration of 2.025% & Hydrogen Concentration of 14.47%.Apparently Caused by Oxygen Being Drawn from Unit 2 Tanks During Preop Testing 1993-07-14
[Table view] Category:RO)
MONTHYEARML20045J0111993-07-14014 July 1993 LER 93-015-00:on 930614,1A Start Bus Alternate Feeder Breaker Tripped Upon Start of Unit 1 RCP Which Resulted in Start of DG Due to Current Transformer Wired Incorrectly. Restored Offsite Power & Secured Final DG.W/930714 Ltr ML20045B9311993-06-10010 June 1993 LER 93-013-00:on 930514,fire Watch Was Not Performed within Time Frame Required by Tech Specs Due to Inadequate Supervision by Fire Protection Foreman.Fire Watch Patrol reestablished.W/930610 Ltr ML20045A7261993-06-0707 June 1993 LER 93-011-00:on 930507,discovered That Fire Barrier Breached W/O Proper Compensatory Measures Established.On 930505,door Leading to Room Housing Containment Spray HX 1A Breached.Roving Fire Watch Established & LCO 3.7.12 Entered ML20029C1761991-03-21021 March 1991 LER 91-002-00:on 910211,unit Operated in Condition Prohibited by Tech Spec 3.3.3.8 Limiting Condition for Operation.Cause Under Investigation.Night Order Issued to Personnel Re Removal of Equipment from svc.W/910321 Ltr ML20029A6711991-02-25025 February 1991 LER 91-002-00:on 910124,LCOs 3.0.5 & 3.8.1.1 Entered When Both Trains of Emergency Gas Treatment Sys Declared Inoperable.Caused by Blown Fuse & Excessive Cycling of Air Start Sys.Fuse replaced.W/910225 Ltr ML20043A4211990-05-16016 May 1990 LER 90-010-00:on 900416,containment Ventilation Isolation Occurred.Caused by Allowing Gaseous Radiation Level to Increase Too Close to Alarm Setpoint.Recovery from Isolation initiated.W/900516 Ltr ML20043A2201990-05-14014 May 1990 LER 90-007-00:on 900413,discovered That Tech Spec Surveillance Requirement Not Performed within Required Interval.Caused by Personnel Error.Surveillance Successfully Performed Since missed.W/900514 Ltr ML20043A2261990-05-14014 May 1990 LER 90-009-00:on 900404,lower Containment Radiation Monitor Found Inoperable & Lower Containment Atmosphere Aligned to Upper Containment Radiation Monitor During Sampling.Caused by Personnel Error.Chemistry Training revised.W/900514 Ltr ML19354D8941990-01-16016 January 1990 LER 89-034-00:on 891215,leak Identified from Fitting on Vol Control Tank Level Transmitter & Auxiliary Bldg Evacuated, Preventing Fire Watch Patrol from Entering Bldg for Hourly Rounds.Fitting tightened.W/900116 Ltr ML20005E0801989-12-22022 December 1989 LER 89-032-00:on 891205,RHR Pumps Determined to Have Deadheading Problem,Per NRC Bulletin 88-004,resulting in Plant Operation Outside Design Basis.On 891128,RHR Pump Exceeded Head Criteria.Pumps started.W/891222 Ltr ML20005E0831989-12-22022 December 1989 LER 89-032-00:on 891201,discovered That Tech Spec Surveillance Requirement to Verify That Valves 1-67-748 & 2-67-748 in Open Position Not Met.Caused by Personnel Error.Correct Valve Position verified.W/891222 Ltr ML20005E1991989-12-20020 December 1989 LER 89-029-00:on 891121,spurious Train B Control Room Isolation Occurred.Caused by Accidental Bumping of Relays & Degraded Fuse in Circuit.Fuses Replaced & Relays Removed & replaced.W/891220 Ltr ML20005D7351989-12-0707 December 1989 LER 89-026-00:on 891107,Limiting Condition for Operation 3.0.3 Entered as Result of More than One Rod Position Indicator (RPI) Per Bank Being Inoperable.Caused by Lack of Preventive Maint.Rpis adjusted.W/891207 Ltr ML19332C4971989-11-22022 November 1989 LER 89-027-00:on 891027,spray &/Or Sprinkler Sys Declared Inoperable as Result of Failure to Perform Surveillance Requirement within Required 18-month Frequency.Caused by Inadequate Procedure.Procedure revised.W/891122 Ltr ML19327B5461989-10-23023 October 1989 LER 89-011-01:on 890823,discovered That Requirement to Source Check Radioactive Gaseous Effluent Monitors Not Met. Caused by Previous Lack of Emphasis on Requirements Recognition.Monitors Source checked.W/891023 Ltr ML19325D2481989-10-13013 October 1989 LER 89-013-00:on 890914,found That Min Number of Operable Photoelectric Fire Detectors Not Maintained for Zone 374. Caused by Identification & Ordering of Incorrect Replacement Fire Detectors.Hourly Fire Watch established.W/891013 Ltr ML19325C5681989-10-12012 October 1989 LER 89-012-00:on 890912,reactor Vessel Level Instrumentation Sys Level Indicator Failed Monthly Channel Check & Declared Inoperable.Caused by Inadequate Training for Two Craft Personnel That Performed vlave.W/891012 Ltr ML20024F1811983-09-0202 September 1983 LER 83-108/03L-0:on 830806,08 & 09,RCS Subcooling Margin Monitor Declared Inoperable Due to Loss of Plant Computer. Caused by Faulty Memory Card A707 in Digital Input Demultiplexer Due to Shorted Zener diode.W/830902 Ltr ML20024C2201983-06-28028 June 1983 LER 83-077/03L-0:on 830531,auxiliary Feedwater Automatic Valve 1-PCV-3-122 Declared Inoperable.Caused by Clogged Hydraulic Moog Valve & Hydraulic Pump Motor Failure Due to High Amperage.Valve,Pump & Motor replaced.W/830628 Ltr ML20024C1091983-06-27027 June 1983 LER 83-081/03L-0:on 830529,upper Containment Outer Airlock Door Found Broken.Caused by Two Failed Operating Machanism Cam Follower Bearings,Due to Normal Wear,Heavy Use & Improper Maint During Const.Bearings replaced.W/830627 Ltr ML20023D3791983-05-0303 May 1983 LER 83-056/01T-0:on 830503,upper Containment Airlock Inner Door Discovered Inoperable.Caused by Sheared Stud & Failed Cam Follower Bearing on Latching Mechanism.Mechanism Repaired & Returned to Svc ML20023B6351983-04-27027 April 1983 LER 83-046/03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc ML20023B5851983-04-27027 April 1983 LER 83-047/03L-0:on 830409,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Memory Parity Error.Computer Restarted & Monitor Restored ML20028B6251982-11-29029 November 1982 LER 82-130/03L-0:on 820928,during Routine Performance of Surveillance Instruction 106,group 1,rows 1 & 2 Min Average Ice Weight Less than Required.Caused by Sublimation of Ice in Crane Wall Area.Ice Added ML20027A9801982-09-0808 September 1982 LER 82-105/03L-0:on 820810,while in Mode 1,one Refueling Water Storage Tank Failed Low & Declared Inoperable.Caused by Faulty Amplifier Card.Transmitter Replaced & Loop Returned to Svc ML20052H6711982-05-14014 May 1982 LER 82-053/03L-0:on 820415,vital Battery Bank II Declared Inoperable When Cell 4 Connection Resistance Found Greater than 150 micro-ohms.Caused by Loose Bolt Connection.Bolt Torqued & Resistance Checked ML20052H4481982-03-29029 March 1982 LER 82-032/03L-0:on 820228,rod Position Indicator M-4 on Control Bank D Declared Inoperable When Indication Dropped to Zero.Caused by Defective Connector.Spare Connector Being Used Until Defective Connector Repaired ML20050C4261982-03-23023 March 1982 LER 82-026/03L-0:on 820221,containment Sump Level Transmitter 2-LT-65-176 Inoperable Due to High Readings. Caused by Leaking Sensor Bellows.Sensor Bellows Replaced & Transmitter Recalibr ML20050C4031982-03-19019 March 1982 LER 82-025/03L-0:on 820212,pressurizer Level Channel 1-LT-68-335 Declared Inoperable.Caused by Transmitter Out of Calibr Due to Instrument Drift.Barton Model 764 Transmitter Recalibr ML20050A9881982-03-15015 March 1982 LER 82-028/03L-0:on 820214 & 15,in Mode 3,cold Leg Accumulator 4 Declared Inoperable Due to Low Boron Concentration.Caused by Leak Through in Flow Control Leak Test & Fill Line Valves.Five Valves Investigated & Repaired ML20050A8411982-03-12012 March 1982 LER 82-022/03L-0:on 820213,during Surveillance Testing, Lower Containment Airlock Inner Door Was Declared Inoperable.Caused by Braces Being Torqued Too Tight.Seals Reset & Surveillance Procedure Revised ML20041F8741982-03-0808 March 1982 LER 82-018/03L-0:on 820207,during Startup,Containment Lower Compartment Average Air Temp Discovered at 124.19 F.Two Lower Compartment Train a Coolers Temp Control Valves Had Wrong Settings.Cause Unknown ML20049J5291982-03-0202 March 1982 LER 82-021/01T-0:on 820217,during Startup,Shutdown Rods in Shutdown Bank a Exceeded Plus/Minus 12 Steps of Actual Position on Indicators.Caused by Misinterpretation of Limiting Condition for Operation 3.1.3.3.Rods Recalibr ML20041A5871982-02-10010 February 1982 LER 82-006/03L-0:on 820115,turbine Driven Auxiliary Feedwater Pump Declared Inoperable Due to Failure to Meet Surveillance Requirements.Caused by Malfunction in Controller 1-FIC-46-57.Controller Replaced ML20041A5691982-02-10010 February 1982 LER 82-005/03L-0:on 820113,remote Shutdown Instrument Channel or Pressurizer Relief Tank Level Declared Inoperable Due to Failure to Meet Surveillance Requirements Caused by Faulty Resistor in Transmitter Circuit Card ML20040G6321982-02-0505 February 1982 LER 82-007/03L-0:on 820108,in Mode 1 at 100% Power,Rod Position Indicator P-4 (Shutdown Bank a) Indicated Greater than 12 Steps Below Step Counter.Defective Indicator Recalibr & Returned to Svc.Connector Pins Cleaned ML20040F7861982-01-22022 January 1982 LER 81-156/03L-0:on 811226,turbine Stop Throttle Valve 3 Declared Inoperable Due to Faulty Limit Switch.Caused by Switch Sticking,Resulting in Inaccurate Signal.Limit Switch Adjusted & Lubricated ML20040C7221982-01-20020 January 1982 LER 81-157/03L-0:on 811222,pressurizer Level Transmitter 1-LT-68-335 Declared Inoperable Due to Failure to Meet Channel Check Requirements.Caused by Accumulation of Gases in Condensate Reservoirs & Sensor Bellows.Gases Vented ML20040F8601982-01-19019 January 1982 LER-81-158/03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested ML20040C7381982-01-19019 January 1982 LER 81-151/03L-0:on 811221,w/unit in Mode 1,one Containment Sump Level Transmitter Declared Inoperable Due to Erratic High Readings.Caused by Instrument Drift.Instrument Recalibr ML20040B7471982-01-15015 January 1982 LER 81-154/03L-0:on 811219,damaged Signal Cables Found on Refueling Water Storage Tank Level Transmitter.Caused by Excessive Heat While Attempting to Thaw Frozen Sensing Lines.Cables Repaired.Transmitter Replaced ML20039C5191981-12-17017 December 1981 LER 81-145/03L-0:on 811118,motor Leads on 1FCV-63-6 Were Discovered Lifted During Quarterly Running of SI-166.1. Probably Caused by Mistake on Data Sheet Signoff & Failure to Reterminate Leads ML20039A5651981-12-10010 December 1981 LER 81-134/03L-0:on 811111,relay Contacts for Fire Zone 367 Reactor Coolant Pump 3 Found Wired Normally Closed.Correct Configuration Is Normally Open.Caused by Error in Connection Drawings.Connection Drawings Revised ML20039A5701981-12-0404 December 1981 LER 81-126/03L-0:on 811105,nuclear Instrumentation Sys Power Range Channel III (N-43) Declared Inoperable.Caused When Instrument Power Fuse Was Inadvertently Pulled Instead of Control Power Fuse.Procedures Revised ML20038C8521981-12-0404 December 1981 LER 81-138/03L-0:on 811106,w/RCS Temp & Pressure at 547 F & 2235 Psig,Respectively,High Thrust Bearing Temp Indicated on Pump 1.Pump Stopped.Motor Inspected.No Abnormal Mechanical Conditions Found.Cause Due to Defective Conductor ML20011B0251981-10-23023 October 1981 LER 81-121/03L-0:on 810925,flux Imbalance Penalty Function Generator XM-92-5005K Found Inoperable.Caused by Module Drift.Module Recalibr ML20010J3821981-09-22022 September 1981 LER 81-108/03L:on 810825,during Performance of SI-159.1, Lower Containment Airlock Failed to Meet Leak Rate Acceptance Criteria.Caused by Loose Gland Nut on Hand Wheel Shaft.Nut Tightened & Airlock Tested ML20005A5311981-06-23023 June 1981 LER 81-063/03L-0:on 810525,w/unit at 99% Power,Containment Hydrogen Analyzer 1-43-210 Was Found Out of Tolerance During Performance of Scheduled Surveillance Test.Reagent Flow Readjusted to Bring Analyzer Into Tolerance ML20004D5611981-06-0303 June 1981 LER 81-054/03L-0:on 810506,chlorine Analyzer 43-205A Was Declared Inoperable Due to Insufficient Electrolyte Drip Rate.Caused by Electrolyte Becoming Stopped Up in Felt Filter.Filter Removed,Cleaned,Reinstalled & Adjusted ML20004D5811981-06-0101 June 1981 LER 81-055/03L-0:on 810504,waste Gas Decay Tank E Was Found to Have Oxygen Concentration of 2.025% & Hydrogen Concentration of 14.47%.Apparently Caused by Oxygen Being Drawn from Unit 2 Tanks During Preop Testing 1993-07-14
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEAR05000327/LER-1999-002-03, :on 990916,EDG Started as Result of Cable Being Damaged During Installation of Thermo-Lag for Kaowool Upgrade Project.Caused by Inadequate pre-job Briefing. Involved Individuals Were Counseled on Event1999-10-15015 October 1999
- on 990916,EDG Started as Result of Cable Being Damaged During Installation of Thermo-Lag for Kaowool Upgrade Project.Caused by Inadequate pre-job Briefing. Involved Individuals Were Counseled on Event
ML20217D2721999-10-12012 October 1999 Safety Evaluation Supporting Amends 248 & 239 to Licenses DPR-77 & DPR-79,respectively ML20217B3651999-10-0606 October 1999 Safety Evaluation Supporting Amends 247 & 238 to Licenses DPR-77 & DPR-79,respectively ML20212J6311999-10-0101 October 1999 SER Accepting Request for Relief from ASME Boiler & Pressure Vessel Code,Section Xi,Requirements for Certain Inservice Insp at Plant,Unit 1 ML20217G3721999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for Sequoyah Nuclear Plant.With ML20212F4761999-09-23023 September 1999 Safety Evaluation Supporting Amends 246 & 237 to Licenses DPR-77 & DPR-79,respectively ML20212F0831999-09-23023 September 1999 Safety Evaluation Granting Relief from Certain Weld Insp at Sequoyah Nuclear Plant,Units 1 & 2 Pursuant to 10CFR50.55a(a)(3)(ii) for Second 10-year ISI Interval ML20212C4761999-08-31031 August 1999 Monthly Operating Repts for Aug 1999 for Sequoyah Nuclear Plant.With ML20212A1841999-08-25025 August 1999 Errata Pages for Rev 0 of WCAP-15224, Analysis of Capsule Y from TVA Sequoyah Unit 1 Reactor Vessel Radiation Surveillance Program ML20210L4361999-08-0202 August 1999 Cycle 9 12-Month SG Insp Rept ML20216E3781999-07-31031 July 1999 Monthly Operating Repts for July 1999 for Sequoyah Nuclear Plant,Units 1 & 2.With ML20210L4451999-07-31031 July 1999 Unit-2 Cycle 10 Voltage-Based Repair Criteria 90-Day Rept ML20210G6631999-07-28028 July 1999 Cycle 9 90-Day ISI Summary Rept ML20211F9031999-06-30030 June 1999 Cycle 9 Refueling Outage ML20196H8621999-06-30030 June 1999 NRC Regulatory Assessment & Oversight Pilot Program, Performance Indicator Data, June 1999 Rept ML20209H3831999-06-30030 June 1999 Monthly Operating Repts for June 1999 for Sequoyah Nuclear Plant.With ML20196J8521999-06-28028 June 1999 Safety Evaluation Authorizing Proposed Alternative to Use Iqis for Radiography Examinations as Provided for in ASME Section III,1992 Edition with 1993 Addenda,Pursuant to 10CFR50.55a(a)(3)(i) ML20195K2951999-05-31031 May 1999 Monthly Operating Repts for May 1999 for Sequoyah Nuclear Plant,Units 1 & 2.With 05000327/LER-1998-003-01, :on 981109,Vital Inverter 1-IV Tripped.Caused by Failed Oscillator Board with Bad Solder Joint,Attributed to Mfg Defect.Replaced Component & Returned Inverter to Operable Status1999-05-27027 May 1999
- on 981109,Vital Inverter 1-IV Tripped.Caused by Failed Oscillator Board with Bad Solder Joint,Attributed to Mfg Defect.Replaced Component & Returned Inverter to Operable Status
05000327/LER-1999-001-04, :on 990415,exceedance of AOT Occurred Due to Failure of Centrifugal Charging Pump.Rotating Element Was Replaced,Testing Was Completed & Pump Was Returned to Svc1999-05-11011 May 1999
- on 990415,exceedance of AOT Occurred Due to Failure of Centrifugal Charging Pump.Rotating Element Was Replaced,Testing Was Completed & Pump Was Returned to Svc
ML20206Q8951999-05-0505 May 1999 Rev 0 to L36 990415 802, COLR for Sequoyah Unit 2 Cycle 10 ML20206G3751999-05-0404 May 1999 Safety Evaluation Supporting Amends 244 & 235 to Licenses DPR-77 & DPR-79,respectively ML20206R5031999-04-30030 April 1999 Monthly Operating Repts for April 1999 for Sequoyah Units 1 & 2.With ML20205N0361999-04-12012 April 1999 Safety Evaluation Supporting Amend 234 to License DPR-79 ML20205P9811999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for Sequoyah Nuclear Plant,Units 1 & 2.With ML20204E8211999-03-16016 March 1999 Safety Evaluation Supporting Amends 243 & 233 to Licenses DPR-77 & DPR-79,respectively ML20205B6631999-02-28028 February 1999 Underground Storage Tank (Ust) Permanent Closure Rept, Sequoyah Nuclear Plant Security Backup DG Ust Sys ML20204C3111999-02-28028 February 1999 Monthly Operating Repts for Feb 1999 for Sequoyah Nuclear Plant,Units 1 & 2.With ML20203H7381999-02-18018 February 1999 Safety Evaluation of Topical Rept BAW-2328, Blended U Lead Test Assembly Design Rept. Rept Acceptable Subj to Listed Conditions ML20206U4331999-02-0909 February 1999 Safety Evaluation Supporting Amends 242 & 232 to Licenses DPR-77 & DPR-79,respectively ML20211A2021999-01-31031 January 1999 Non-proprietary TR WCAP-15129, Depth-Based SG Tube Repair Criteria for Axial PWSCC Dented TSP Intersections ML20198S7301998-12-31031 December 1998 Cycle 10 Voltage-Based Repair Criteria 90-Day Rept ML20199G3641998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for Sequoyah Nuclear Plant,Units 1 & 2.With 05000327/LER-1998-004-02, :on 981120,failure to Perform Surveillance within Required Time Interval,Was Determined.Caused by Leaking Vent Valve.Engineering Personnel Evaluated Alternative Methods for Performing Channel Check1998-12-21021 December 1998
- on 981120,failure to Perform Surveillance within Required Time Interval,Was Determined.Caused by Leaking Vent Valve.Engineering Personnel Evaluated Alternative Methods for Performing Channel Check
05000327/LER-1998-003-04, :on 981109,automatic Reactor Trip Occurred. Caused by Component in Bridge Circuit of Vital Inverter Failed.Inverter Bridge Circuit Replaced1998-12-0909 December 1998
- on 981109,automatic Reactor Trip Occurred. Caused by Component in Bridge Circuit of Vital Inverter Failed.Inverter Bridge Circuit Replaced
ML20197J5621998-12-0303 December 1998 Unit 1 Cycle 9 90-Day ISI Summary Rept ML20197K1161998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for Sequoyah Nuclear Plant,Units 1 & 2.With ML20196C4091998-11-19019 November 1998 Safety Evaluation Supporting Amends 238 & 228 to Licenses DPR-77 & DPR-79,respectively ML20196B0231998-11-19019 November 1998 Safety Evaluation Supporting Amends 239 & 229 to Licenses DPR-77 & DPR-79,respectively 05000328/LER-1998-002-05, :on 981016,turbine Trip Occurred Followed by Reactor Trip.Caused by Generator Lockout.Mod Being Evaluated to Physically Isolate Relays from Vibration of Transformers & Adding Two of Two Logic for Actuation of Sudden Pressure1998-11-10010 November 1998
- on 981016,turbine Trip Occurred Followed by Reactor Trip.Caused by Generator Lockout.Mod Being Evaluated to Physically Isolate Relays from Vibration of Transformers & Adding Two of Two Logic for Actuation of Sudden Pressure
ML20195F8061998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for Sequoyah Nuclear Plant.With ML20154H6091998-09-30030 September 1998 Monthly Operating Repts for Sept 1998 for Sequoyah Nuclear Plant,Units 1 & 2.With 05000328/LER-1998-001-05, :on 980827,turbine Trip Occurred Followed by Reactor Trip.Caused by Failure of Sudden Pressure Relay on B Phase Main Transformer.Control Room Operators Responded & Removed,Inspected & Replaced Failed Relays1998-09-28028 September 1998
- on 980827,turbine Trip Occurred Followed by Reactor Trip.Caused by Failure of Sudden Pressure Relay on B Phase Main Transformer.Control Room Operators Responded & Removed,Inspected & Replaced Failed Relays
ML20154H6251998-09-17017 September 1998 Rev 0 to Sequoyah Nuclear Plant Unit 1 Cycle 10 Colr ML20153B0881998-08-31031 August 1998 Monthly Operating Repts for Aug 1998 for Sequoyah Nuclear Plant.With ML20238F2961998-08-28028 August 1998 Safety Evaluation Supporting Amends 235 & 225 to Licenses DPR-77 & DPR-79,respectively ML20239A0631998-08-27027 August 1998 SER Accepting Licensee Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, for Sequoyah Nuclear Plant,Units 1 & 2 05000327/LER-1998-002-03, :on 980716,inadequate Surveillance Testing Was Discovered.Caused by Misinterpretation of ANSI Standard. Revised Appropriate Procedures to Provide Required Guidance1998-08-14014 August 1998
- on 980716,inadequate Surveillance Testing Was Discovered.Caused by Misinterpretation of ANSI Standard. Revised Appropriate Procedures to Provide Required Guidance
ML20236Y2091998-08-0707 August 1998 Safety Evaluation Accepting Relief Requests RP-03,RP-05, RP-07,RV-05 & RV-06 & Denying RV-07 & RV-08 ML20237A4411998-07-31031 July 1998 Blended Uranium Lead Test Assembly Design Rept 1999-09-30
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