ML19316A444
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| ML19316A444 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/28/1978 |
| From: | Ken Wilson DUKE POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19316A426 | List: |
| References | |
| LER-77-031-03L, LER-77-31-3L, NUDOCS 7912110713 | |
| Download: ML19316A444 (1) | |
Similar Documents at Oconee | |
|---|---|
Category:LICENSEE EVENT REPORT (SEE ALSO AO
MONTHYEARML20046C1291993-08-0202 August 1993
[Table view]LER 93-007-00:on 930701,determined That Unit 1 Ssf Rc Makeup Sys Inoperable in Past Due to Design Deficiency.Operations Procedures Revised to Reflect Newly Calculated Operating Limits for Rc Makeup Pump,Rcps & RCS.W/930802 Ltr ML20024B9881983-06-30030 June 1983 LER 83-008/03L-0:on 830531,motor Driven Emergency Feedwater Pump Became Inoperable When Power Removed from Circuitry for Repair of Automatic Initiation Switch 2PS-388.Caused by Component Failure.Switch Replaced & recalibr.W/830630 Ltr ML20024C4231983-06-24024 June 1983 LER 83-011/03L-0:on 830525,lockout Indication Received for Startup Transformer CT3.Cause unknown.CT3 Energized. W/830624 Ltr ML20023C7111983-05-0505 May 1983 Updated LER 83-012/01T-1:on 830421,emergency Discharge Valve to Keowee Tailrace CCW-8 Opened W/O Command,Rendering Condenser Circulating Water Emergency Discharge Sys Inoperable.Caused by Component Failure ML20023C4461983-04-22022 April 1983 LER 83-012/01T-0:on 830408,emergency Discharge Valve to Keowee Tailrace CCW-8 Opened W/O Command,Rendering Condenser Circulating Water Emergency Discharge Sys Inoperable.Caused by Shorted Conductor.Conductor Replaced ML20028E0991983-01-13013 January 1983 LER 82-020/03L-0:on 821214,both Unit 1 Turbine Driven & 1A Motor Driven Emergency Feedwater Pumps Incapable of Automatic Actuation for 60 S.Caused by Defective Procedures. Personnel Counseled & Procedures Rewritten ML20028D1771983-01-0606 January 1983 LER 82-019/03L-0:on 821207,valve 1HP-25 Failed to Open Remotely During Operational Valve Function Test.Caused by Component Failure.Valve Manually Cracked Open,Cycled & Stroke Tested ML20027D8541982-11-0303 November 1982 LER 82-011/03L-0:on 821004,while Inspecting Snubber Installed on 821002,mechanic Found Snubber Inoperable.Caused by Misreading of Hanger Sketch.Snubber Removed,Tested & Reinstalled ML20027D6331982-10-28028 October 1982 LER 82-018/01T-0:on 821014,three of Six Installed Safety Valves Determined to Have Degraded Performance Based on Valve Ring Settings.Cause of Difference in Ring Settings Unknown.Valves Reset Using EPRI Tested Settings ML20027B8391982-09-21021 September 1982 LER 82-011/03L-0:on 820822,erratic Indication Observed on Channel a Borated Water Storage Tank Level Instrumentation. Caused by Boiling Water in Level Transmitter Line.Heat Tracing Disconnected & Transmitter Lines Refilled ML20027B4621982-09-10010 September 1982 LER 82-009/01T-0:on 820804,during Refueling Insp of Reactor Coolant Pump,Five Closure Studs Found Degraded in Size Below Tech Spec Min.Caused by Boric Acid Corrosion Due to Closure Gasket Leakage.Studs Replaced ML20052H6951982-05-12012 May 1982 LER 82-007/01T-0:on 820428,during Final Reactor Bldg Insp, One Vertical Tendon in Secondary Shield Wall Was Found Broken.Caused by Stress Corrosion of post-tensioning Wires Near Stressing Washers Due to Water ML20052G5101982-05-0707 May 1982 LER 82-010/03L-0:on 820407,reactor Bldg Isolation Valve 1LWD-1 Failed to Close After Pumping Reactor Bldg Normal Sump.Apparently Caused by Dirty Contact in Valve Operating Motor Starting Compartment.Contact Cleaned ML20052A4111982-04-16016 April 1982 LER 82-006/01T-0:on 820402,spent Fuel Assembly Moved from Spent Fuel Pool Racks to Sipping Can While Spent Fuel Pit Ventilation Sys Out of Svc.Caused by Personnel Error.Fuel Handling Suspended ML20052A2371982-04-16016 April 1982 LER 82-006/01T-0:on 820306,steam Generator Tube Leak of Approx 0.08 Gpm Indicated by Condensate Steam Air Ejector Offgas Radiation Monitor.Caused by Crack in Tube 78-2.Unit Shut Down,Leaking Tube Stabilized & Plugged ML20052A4021982-04-13013 April 1982 LER 82-004/01T:on 820302,testing of HPI Nozzle Areas Revealed Loose 2A2 Thermal Sleeves & Cracks in Id of Safe End & Piping.Caused by Thermal Fatigue.Cracked Piping,Safe End & Thermal Sleeves Replaced ML20052A4121982-04-13013 April 1982 LER 82-005/01T-0:on 820330,spent Fuel Pool Fans Found to Have Been Inoperable During 820323-29 Move of 10 Fuel Assemblies.Caused by Personnel Error in That White Tags for Fans Not Placed or Removed During Leak Rate Test Procedure ML20052A3201982-04-0909 April 1982 LER 82-004/01T-0:on 820226,nondestructive Testing of HPI Nozzles Revealed 3A2 Thermal Sleeve Displaced & Cracks in Inside Diameter of Piping & Safe End.Caused by Thermal Fatigue Due to Loose Thermal Sleeve.Piping Replaced ML20052A3991982-04-0909 April 1982 LER 82-009/01T-0:on 820329,five Differential Pressure Regulators for Oxygen Supply on Channel B Hydrogen Analyzer Found Defective.Caused by Mfg Deficiency ML20052A5141982-03-26026 March 1982 LER 82-005/01T-0:on 820312,insp of Fuel Assembly W/Experimental Zircaloy Spacer Grids Revealed That Grids Had Moved from Normal Position.Caused by Loss of Contact W/Mark B4 Grids Due to Weak Springs & Too Much Gap Growth ML20050B0171982-03-12012 March 1982 LER 82-002/03L-0:on 820210,reactor Protection Sys Channel B Hot Leg Temp Readings Were Lower than Those of Channels A,C & D.Caused by Failure of Liner Bridge in Input Circuitry for Channel B Indication.Bridge Replaced ML20050B0581982-03-12012 March 1982 LER 82-002/01T-0:on 820222,control Operator Moved Group 8 Control Rods Into Tech Spec Restricted Area to Clear Core Axial Imbalance Alarm.Caused by Operator Error.Rod Position Corrected & Computer Alarms Modified to Include Group 8 ML20050A9711982-03-11011 March 1982 LER 82-003/01T-0:on 820211,steam Generator Tube Leak of Approx 0.01 Gpm Indicated by Condensate Steam Air Ejector Offgas Monitor.Caused by Erosion of Tube at Point 31 Inches Above Fifteenth Tube Support Plate.Tube Explosively Plugged ML20042A5161982-03-0909 March 1982 LER 82-003/01T-0:on 820209,steam Generator Tube Leak of Approx 0.11 Gpm Was Indicated by Condensate Steam Air Ejector Offgas Radiation Monitor.Caused by Crack on Tube 74-2.Tube Stabilized & Plugged ML20041F8611982-03-0505 March 1982 LER 82-001/03L-0:on 820203,motor Driven Emergency Feedwater Pump 1B Declared Inoperable Due to Bearing Vibration Exceeding Acceptable Limits.Caused by Misalignment Between Pump & Motor.Pump & Motor Realigned & Tested Satisfactorily ML20041F8281982-03-0303 March 1982 LER 82-004/01T-0:on 820217,exam of Radiograph on Weld 85 on Isometric Drawing 11 Indicated Circumferential Void.Caused by Improper fit-up Weld & Insp During Initial Const.Section of Weld Replaced & Socket Welded to Coupling ML20049J5231982-02-26026 February 1982 LER 82-001/03L-0:on 820128,channel B Borated Water Storage Tank Level Indication Declared Inoperable Due to Erratic Indication.Caused by Dirt & Oil in Level Indicator Booster Relay & High Thermostat Settings on Sys Heat Trace ML20052A6461982-02-19019 February 1982 Updated LER 81-018/01T-1:on 811123,component Cooling Water Discharge Valve to Keowee Tailrace Inadvertently Opened & Failed to Close,Resulting in Loss of Prime for Emergency Cooling Discharge Line.Caused by Procedural Deficiencies ML20041D6581982-02-16016 February 1982 LER 82-003/01T-0:on 820202,video Insp of Fuel Assemblies Revealed Broken Holddown Springs on Batch 7 Fuel Assemblies 01K3,01JV & 01KX.Caused by fatigue-induced Cracking at Surface Flaw.Springs Will Be Replaced Before Reload ML20041A4691982-02-0505 February 1982 LER 82-002/01T-0:on 820122,three Core Support Assembly Thermal Shield Bolts Found W/Heads Broken Off & Shock Pad Y-2 Attachment Bolts Discovered Broken.Caused by Intergranular Stress Corrosion Cracking.Pad Removed ML20040G7141982-01-29029 January 1982 LER 82-001/01T-0:on 820117,reactor Bldg Equipment Hatch Found Leaking Air Through Gap in Seal.Caused by Personnel Not Verifying Good metal-to-gasket Seal Had Been Made. Procedures Revised to Require Verification of Proper Seal ML20040E6641982-01-25025 January 1982 LER 81-020/03L-0:on 811226,borated Water Storage Tank Channel a Level Instrumentation Declared Inoperable Due to Erratic Indication.Cause Undetermined Due to Intermittent Occurrence of Erratic Indication.Instrument Returned to Svc ML20040B7071982-01-12012 January 1982 LER 81-024/01T-0:on 811229,high Humidity Environ in West Penetration Room Rendered Both Penetration Room Ventilation Sys Trains Inoperable.Caused by Leak on Valve 1FDW-265.Leak Repaired ML20039F3171981-12-31031 December 1981 LER 81-016/03L-0:on 811202,channel C Pump Power Monitor Failed to Send Trip Signal During Online Testing.Caused by Failed 1C on Monitor Logic Board.Board Replaced & Monitor Tested Satisfactorily ML20039D3171981-12-23023 December 1981 LER 81-023/01T-0:on 811209,four Gray safety-related Cables Which Did Not Meet Channel Separation Criteria,Discovered on 811125,determined Reportable.Caused by Improper Original Field Installation.Installation Corrected ML20039D9581981-12-21021 December 1981 LER 81-018/01T-0:on 811123,component Cooling Water Discharge Valve to Keowee Tailrace Inadvertently Opened & Failed Open. Caused by Personnel Error & Failure of Valve CCW-8.Valve Manually Closed.Procedures Will Be Revised ML20039D0141981-12-21021 December 1981 Updated LER 81-019/01T-1:on 811124,const Personnel Severed 2-inch Line Off Water Header Supplying CT-5 Transformer Fire Suppression Sys.Caused by Failure to Start Continuous Fire Watch & Back Up Fire Suppression Sys ML20039C2921981-12-21021 December 1981 LER 81-014/03L-0:on 811125,channel B flux-imbalance Flow Bistable Found to Trip Outside Tech Spec Limit.Caused by non-linear Gain on Reactor Protection Sys Channel B Scaled delta-flux Amplifier.Amplifier Replaced ML20038C8971981-12-0404 December 1981 LER 81-022/01T-0:on 811113,six Variable Spring Hangers on Emergency Feedwater Discharge Found Not Carrying Specified Design Loads.Caused by High Temp Conditions During Loading. Hangers to Be Replaced & Insulated from High Temp Environ ML20038A9891981-11-13013 November 1981 LER 81-017/01T-0:on 810919,while Attempting to Initiate Decay Heat Cooling to Stop Steam Generator Tube Leak,Valve 2LP-2 Failed to Open Electrically or Manually.Apparently Caused by Bent Valve Stem.Valve Stem Replaced ML20038B1931981-11-13013 November 1981 LER 81-016/01T-0:on 810918,steam Generator Tube Leak of Approx 0.03 Gpm & Increasing to 25-30 Gpm,Indicated by Monitor.Apparently Caused by Circumferential Crack of Tube 77-2 at 15th Support Plate.Tube Stabilized & Plugged ML20038B1851981-11-0404 November 1981 Updated LER 81-019/01T-0:on 811019 & 20,four Separate Liquid Waste Releases Made W/Inoperable Effluent Monitors & Inadequate Water Samples.Caused by Failure to Identify Sample Point Change Due to Temporary Sys Mod ML20011A7471981-10-20020 October 1981 LER 81-018/03L-1:on 810911,safety-related Battery Surveillance Procedures Found Out of Compliance W/Revised Tech Spec 4.6.9.Caused by Personnel Failure to Identify Necessary Procedure Changes.Procedures Revised ML20010J0231981-09-17017 September 1981 LER 81-016/01T-0:on 810903,magnetic Particle Testing on 1A2 Reactor Coolant Pressure Seal Housing Bolts Revealed Linear Indications.Bolts W/Rejectable Indications Will Be Replaced ML20010H9221981-09-14014 September 1981 LER 81-013/03L-0:on 810815,reactor Bldg Spray Pump 2A Declared Inoperable Due to Oil Leak on Bearing Oil Reservoir.Caused by Loose Piping Allowing Leakage.Reservoir Refilled W/Oil ML20010F8281981-09-0404 September 1981 LER 81-011/03L-0:on 810806 & 07,RCS Subcooling Margin Monitor Was Inoperable & Backup Method Unavailable.Caused by out-of-svc Unit 2 Operator Aid Computer Due to Malfunction of AGRA2 Group Relay Board & Matrix Card ML20010E7781981-08-25025 August 1981 LER 81-015/01T-0:on 810811,modules in Reactor Protection Sys Were Found to Have Errors Larger than Originally Calculated Values.Errors re-evaluated & Setpoints Changed to New Settings ML20010D2371981-08-17017 August 1981 LER 81-015/01T-0:on 810720,while Attempting to Perform Engineered Safeguard Periodic Test,Low Pressure Injection Pump 3-B Failed to Start.Caused by Personnel Error.Pump Motor Bearings Replaced & Personnel Counseled ML20010F4511981-07-31031 July 1981 LER 81-014/01L-0:on 810717,A & B High Pressure Svc Water Pumps Discovered W/O Control Power Indication & Elevated Water Storage Tank Showed Zero Level.Caused by Control Breaker Source a & B Breakers Being Open & Blown Fuse ML20009G6331981-07-24024 July 1981 LER 81-012/03L-0:on 810624,discovered safety-related Hydraulic Snubber on Atmospheric Dump Line B Was Broken at Rod Eye.Caused by Vibration.Snubber Repaired 1993-08-02 Category:RO) MONTHYEARML20046C1291993-08-0202 August 1993
[Table view]LER 93-007-00:on 930701,determined That Unit 1 Ssf Rc Makeup Sys Inoperable in Past Due to Design Deficiency.Operations Procedures Revised to Reflect Newly Calculated Operating Limits for Rc Makeup Pump,Rcps & RCS.W/930802 Ltr ML20024B9881983-06-30030 June 1983 LER 83-008/03L-0:on 830531,motor Driven Emergency Feedwater Pump Became Inoperable When Power Removed from Circuitry for Repair of Automatic Initiation Switch 2PS-388.Caused by Component Failure.Switch Replaced & recalibr.W/830630 Ltr ML20024C4231983-06-24024 June 1983 LER 83-011/03L-0:on 830525,lockout Indication Received for Startup Transformer CT3.Cause unknown.CT3 Energized. W/830624 Ltr ML20023C7111983-05-0505 May 1983 Updated LER 83-012/01T-1:on 830421,emergency Discharge Valve to Keowee Tailrace CCW-8 Opened W/O Command,Rendering Condenser Circulating Water Emergency Discharge Sys Inoperable.Caused by Component Failure ML20023C4461983-04-22022 April 1983 LER 83-012/01T-0:on 830408,emergency Discharge Valve to Keowee Tailrace CCW-8 Opened W/O Command,Rendering Condenser Circulating Water Emergency Discharge Sys Inoperable.Caused by Shorted Conductor.Conductor Replaced ML20028E0991983-01-13013 January 1983 LER 82-020/03L-0:on 821214,both Unit 1 Turbine Driven & 1A Motor Driven Emergency Feedwater Pumps Incapable of Automatic Actuation for 60 S.Caused by Defective Procedures. Personnel Counseled & Procedures Rewritten ML20028D1771983-01-0606 January 1983 LER 82-019/03L-0:on 821207,valve 1HP-25 Failed to Open Remotely During Operational Valve Function Test.Caused by Component Failure.Valve Manually Cracked Open,Cycled & Stroke Tested ML20027D8541982-11-0303 November 1982 LER 82-011/03L-0:on 821004,while Inspecting Snubber Installed on 821002,mechanic Found Snubber Inoperable.Caused by Misreading of Hanger Sketch.Snubber Removed,Tested & Reinstalled ML20027D6331982-10-28028 October 1982 LER 82-018/01T-0:on 821014,three of Six Installed Safety Valves Determined to Have Degraded Performance Based on Valve Ring Settings.Cause of Difference in Ring Settings Unknown.Valves Reset Using EPRI Tested Settings ML20027B8391982-09-21021 September 1982 LER 82-011/03L-0:on 820822,erratic Indication Observed on Channel a Borated Water Storage Tank Level Instrumentation. Caused by Boiling Water in Level Transmitter Line.Heat Tracing Disconnected & Transmitter Lines Refilled ML20027B4621982-09-10010 September 1982 LER 82-009/01T-0:on 820804,during Refueling Insp of Reactor Coolant Pump,Five Closure Studs Found Degraded in Size Below Tech Spec Min.Caused by Boric Acid Corrosion Due to Closure Gasket Leakage.Studs Replaced ML20052H6951982-05-12012 May 1982 LER 82-007/01T-0:on 820428,during Final Reactor Bldg Insp, One Vertical Tendon in Secondary Shield Wall Was Found Broken.Caused by Stress Corrosion of post-tensioning Wires Near Stressing Washers Due to Water ML20052G5101982-05-0707 May 1982 LER 82-010/03L-0:on 820407,reactor Bldg Isolation Valve 1LWD-1 Failed to Close After Pumping Reactor Bldg Normal Sump.Apparently Caused by Dirty Contact in Valve Operating Motor Starting Compartment.Contact Cleaned ML20052A4111982-04-16016 April 1982 LER 82-006/01T-0:on 820402,spent Fuel Assembly Moved from Spent Fuel Pool Racks to Sipping Can While Spent Fuel Pit Ventilation Sys Out of Svc.Caused by Personnel Error.Fuel Handling Suspended ML20052A2371982-04-16016 April 1982 LER 82-006/01T-0:on 820306,steam Generator Tube Leak of Approx 0.08 Gpm Indicated by Condensate Steam Air Ejector Offgas Radiation Monitor.Caused by Crack in Tube 78-2.Unit Shut Down,Leaking Tube Stabilized & Plugged ML20052A4021982-04-13013 April 1982 LER 82-004/01T:on 820302,testing of HPI Nozzle Areas Revealed Loose 2A2 Thermal Sleeves & Cracks in Id of Safe End & Piping.Caused by Thermal Fatigue.Cracked Piping,Safe End & Thermal Sleeves Replaced ML20052A4121982-04-13013 April 1982 LER 82-005/01T-0:on 820330,spent Fuel Pool Fans Found to Have Been Inoperable During 820323-29 Move of 10 Fuel Assemblies.Caused by Personnel Error in That White Tags for Fans Not Placed or Removed During Leak Rate Test Procedure ML20052A3201982-04-0909 April 1982 LER 82-004/01T-0:on 820226,nondestructive Testing of HPI Nozzles Revealed 3A2 Thermal Sleeve Displaced & Cracks in Inside Diameter of Piping & Safe End.Caused by Thermal Fatigue Due to Loose Thermal Sleeve.Piping Replaced ML20052A3991982-04-0909 April 1982 LER 82-009/01T-0:on 820329,five Differential Pressure Regulators for Oxygen Supply on Channel B Hydrogen Analyzer Found Defective.Caused by Mfg Deficiency ML20052A5141982-03-26026 March 1982 LER 82-005/01T-0:on 820312,insp of Fuel Assembly W/Experimental Zircaloy Spacer Grids Revealed That Grids Had Moved from Normal Position.Caused by Loss of Contact W/Mark B4 Grids Due to Weak Springs & Too Much Gap Growth ML20050B0171982-03-12012 March 1982 LER 82-002/03L-0:on 820210,reactor Protection Sys Channel B Hot Leg Temp Readings Were Lower than Those of Channels A,C & D.Caused by Failure of Liner Bridge in Input Circuitry for Channel B Indication.Bridge Replaced ML20050B0581982-03-12012 March 1982 LER 82-002/01T-0:on 820222,control Operator Moved Group 8 Control Rods Into Tech Spec Restricted Area to Clear Core Axial Imbalance Alarm.Caused by Operator Error.Rod Position Corrected & Computer Alarms Modified to Include Group 8 ML20050A9711982-03-11011 March 1982 LER 82-003/01T-0:on 820211,steam Generator Tube Leak of Approx 0.01 Gpm Indicated by Condensate Steam Air Ejector Offgas Monitor.Caused by Erosion of Tube at Point 31 Inches Above Fifteenth Tube Support Plate.Tube Explosively Plugged ML20042A5161982-03-0909 March 1982 LER 82-003/01T-0:on 820209,steam Generator Tube Leak of Approx 0.11 Gpm Was Indicated by Condensate Steam Air Ejector Offgas Radiation Monitor.Caused by Crack on Tube 74-2.Tube Stabilized & Plugged ML20041F8611982-03-0505 March 1982 LER 82-001/03L-0:on 820203,motor Driven Emergency Feedwater Pump 1B Declared Inoperable Due to Bearing Vibration Exceeding Acceptable Limits.Caused by Misalignment Between Pump & Motor.Pump & Motor Realigned & Tested Satisfactorily ML20041F8281982-03-0303 March 1982 LER 82-004/01T-0:on 820217,exam of Radiograph on Weld 85 on Isometric Drawing 11 Indicated Circumferential Void.Caused by Improper fit-up Weld & Insp During Initial Const.Section of Weld Replaced & Socket Welded to Coupling ML20049J5231982-02-26026 February 1982 LER 82-001/03L-0:on 820128,channel B Borated Water Storage Tank Level Indication Declared Inoperable Due to Erratic Indication.Caused by Dirt & Oil in Level Indicator Booster Relay & High Thermostat Settings on Sys Heat Trace ML20052A6461982-02-19019 February 1982 Updated LER 81-018/01T-1:on 811123,component Cooling Water Discharge Valve to Keowee Tailrace Inadvertently Opened & Failed to Close,Resulting in Loss of Prime for Emergency Cooling Discharge Line.Caused by Procedural Deficiencies ML20041D6581982-02-16016 February 1982 LER 82-003/01T-0:on 820202,video Insp of Fuel Assemblies Revealed Broken Holddown Springs on Batch 7 Fuel Assemblies 01K3,01JV & 01KX.Caused by fatigue-induced Cracking at Surface Flaw.Springs Will Be Replaced Before Reload ML20041A4691982-02-0505 February 1982 LER 82-002/01T-0:on 820122,three Core Support Assembly Thermal Shield Bolts Found W/Heads Broken Off & Shock Pad Y-2 Attachment Bolts Discovered Broken.Caused by Intergranular Stress Corrosion Cracking.Pad Removed ML20040G7141982-01-29029 January 1982 LER 82-001/01T-0:on 820117,reactor Bldg Equipment Hatch Found Leaking Air Through Gap in Seal.Caused by Personnel Not Verifying Good metal-to-gasket Seal Had Been Made. Procedures Revised to Require Verification of Proper Seal ML20040E6641982-01-25025 January 1982 LER 81-020/03L-0:on 811226,borated Water Storage Tank Channel a Level Instrumentation Declared Inoperable Due to Erratic Indication.Cause Undetermined Due to Intermittent Occurrence of Erratic Indication.Instrument Returned to Svc ML20040B7071982-01-12012 January 1982 LER 81-024/01T-0:on 811229,high Humidity Environ in West Penetration Room Rendered Both Penetration Room Ventilation Sys Trains Inoperable.Caused by Leak on Valve 1FDW-265.Leak Repaired ML20039F3171981-12-31031 December 1981 LER 81-016/03L-0:on 811202,channel C Pump Power Monitor Failed to Send Trip Signal During Online Testing.Caused by Failed 1C on Monitor Logic Board.Board Replaced & Monitor Tested Satisfactorily ML20039D3171981-12-23023 December 1981 LER 81-023/01T-0:on 811209,four Gray safety-related Cables Which Did Not Meet Channel Separation Criteria,Discovered on 811125,determined Reportable.Caused by Improper Original Field Installation.Installation Corrected ML20039D9581981-12-21021 December 1981 LER 81-018/01T-0:on 811123,component Cooling Water Discharge Valve to Keowee Tailrace Inadvertently Opened & Failed Open. Caused by Personnel Error & Failure of Valve CCW-8.Valve Manually Closed.Procedures Will Be Revised ML20039D0141981-12-21021 December 1981 Updated LER 81-019/01T-1:on 811124,const Personnel Severed 2-inch Line Off Water Header Supplying CT-5 Transformer Fire Suppression Sys.Caused by Failure to Start Continuous Fire Watch & Back Up Fire Suppression Sys ML20039C2921981-12-21021 December 1981 LER 81-014/03L-0:on 811125,channel B flux-imbalance Flow Bistable Found to Trip Outside Tech Spec Limit.Caused by non-linear Gain on Reactor Protection Sys Channel B Scaled delta-flux Amplifier.Amplifier Replaced ML20038C8971981-12-0404 December 1981 LER 81-022/01T-0:on 811113,six Variable Spring Hangers on Emergency Feedwater Discharge Found Not Carrying Specified Design Loads.Caused by High Temp Conditions During Loading. Hangers to Be Replaced & Insulated from High Temp Environ ML20038A9891981-11-13013 November 1981 LER 81-017/01T-0:on 810919,while Attempting to Initiate Decay Heat Cooling to Stop Steam Generator Tube Leak,Valve 2LP-2 Failed to Open Electrically or Manually.Apparently Caused by Bent Valve Stem.Valve Stem Replaced ML20038B1931981-11-13013 November 1981 LER 81-016/01T-0:on 810918,steam Generator Tube Leak of Approx 0.03 Gpm & Increasing to 25-30 Gpm,Indicated by Monitor.Apparently Caused by Circumferential Crack of Tube 77-2 at 15th Support Plate.Tube Stabilized & Plugged ML20038B1851981-11-0404 November 1981 Updated LER 81-019/01T-0:on 811019 & 20,four Separate Liquid Waste Releases Made W/Inoperable Effluent Monitors & Inadequate Water Samples.Caused by Failure to Identify Sample Point Change Due to Temporary Sys Mod ML20011A7471981-10-20020 October 1981 LER 81-018/03L-1:on 810911,safety-related Battery Surveillance Procedures Found Out of Compliance W/Revised Tech Spec 4.6.9.Caused by Personnel Failure to Identify Necessary Procedure Changes.Procedures Revised ML20010J0231981-09-17017 September 1981 LER 81-016/01T-0:on 810903,magnetic Particle Testing on 1A2 Reactor Coolant Pressure Seal Housing Bolts Revealed Linear Indications.Bolts W/Rejectable Indications Will Be Replaced ML20010H9221981-09-14014 September 1981 LER 81-013/03L-0:on 810815,reactor Bldg Spray Pump 2A Declared Inoperable Due to Oil Leak on Bearing Oil Reservoir.Caused by Loose Piping Allowing Leakage.Reservoir Refilled W/Oil ML20010F8281981-09-0404 September 1981 LER 81-011/03L-0:on 810806 & 07,RCS Subcooling Margin Monitor Was Inoperable & Backup Method Unavailable.Caused by out-of-svc Unit 2 Operator Aid Computer Due to Malfunction of AGRA2 Group Relay Board & Matrix Card ML20010E7781981-08-25025 August 1981 LER 81-015/01T-0:on 810811,modules in Reactor Protection Sys Were Found to Have Errors Larger than Originally Calculated Values.Errors re-evaluated & Setpoints Changed to New Settings ML20010D2371981-08-17017 August 1981 LER 81-015/01T-0:on 810720,while Attempting to Perform Engineered Safeguard Periodic Test,Low Pressure Injection Pump 3-B Failed to Start.Caused by Personnel Error.Pump Motor Bearings Replaced & Personnel Counseled ML20010F4511981-07-31031 July 1981 LER 81-014/01L-0:on 810717,A & B High Pressure Svc Water Pumps Discovered W/O Control Power Indication & Elevated Water Storage Tank Showed Zero Level.Caused by Control Breaker Source a & B Breakers Being Open & Blown Fuse ML20009G6331981-07-24024 July 1981 LER 81-012/03L-0:on 810624,discovered safety-related Hydraulic Snubber on Atmospheric Dump Line B Was Broken at Rod Eye.Caused by Vibration.Snubber Repaired 1993-08-02 Category:TEXT-SAFETY REPORT MONTHYEARML20206P1501999-01-0505 January 1999
[Table view]LER 98-S03-00:on 981207,security Officer Discovered Uncontrolled Safeguards Info Drawing.Caused by Failure to Follow Established Procedures & Policies.Drawing Was Controlled by Site Security.With ML20216F9931998-12-31031 December 1998 Piedmont Municipal Power Agency 1998 Annual Rept ML20198E6381998-12-17017 December 1998 LER 98-S02-00:on 981130,security Access Was Revoked Due to Falsification of Criminal Record.Individual Was Escorted from Protected Area & Unescorted Access Was Restricted. with ML20153G4601998-09-30030 September 1998 USI A-46 Seismic Evaluation Rept, Vols 1-2 ML17354B0971998-09-0909 September 1998 Part 21 Rept Re Possible Machining Defect in Certain One Inch Stainless Steel Swagelok Front Ferrules,Part Number SS-1613-1.Caused by Tubing Slipping Out of Fitting at Three Times Working Pressure of Tubing.Notified Affected Utils ML15261A4681998-09-0404 September 1998 Safety Evaluation Supporting Amends 232,232 & 231 to Licenses DPR-38,DPR-47 & DPR-55,respectively ML20248F7441998-05-31031 May 1998 Reactor Vessel Working Group,Response to RAI Regarding Reactor Pressure Vessel Integrity ML20247L9041997-12-31031 December 1997 1997 Annual Rept for Duke Energy Corporation & Saluda River Electric Cooperative,Inc,Financial Statements as of Dec 1997 & 1996 Together W/Auditors Rept ML20198J7651997-10-15015 October 1997 Safety Evaluation Accepting 10-yr Interval Insp Program Plan Alternatives for Listed Plants Units ML20148S3141997-06-30030 June 1997 Ro:On 970422,Oconee Unit 2 Was Shut Down Due to Leak in Rcs. Leak Was Caused by Crack in Pipe to safe-end Weld Connection at RCS Nozzle for HPI Sys A1 Injection Line.Unit 1 Was Shut Down to Inspect Hpis Injection Lines & Implement Ldst Mods ML20148H2501997-06-0505 June 1997 Safety Evaluation Accepting Proposed Restructuring of Util Through Acquisition Of,& Merger W/Panenergy Corp ML20210E3591997-03-27027 March 1997 Part 21 Rept Re Sorrento Electronics Inc Has Determined Operation & Maint Manual May Not Adequately Define Requirements for Performing Periodic Surveillance of SR Applications.Caused by Hardware Failures.Revised RM-23A ML20134N7121997-02-20020 February 1997 Safety Evaluation Accepting Relief Request 96-04 for Plant ML20138L2151997-01-31031 January 1997 Monthly Operating Repts for Jan 1997 for Oconee Nuclear Station,Units 1,2 & 3 ML20138L2281996-12-31031 December 1996 Revised Monthly Operating Repts for Dec 1996 for Oconee Nuclear Station,Units 1,2 & 3 ML20133C1231996-12-23023 December 1996 Informs Commission of Staff Review of Request for License Amends from DPC to Perform Emergency Power Engineered Safeguards Functional Test on Three Oconee Nuclear Units ML20115F2471996-07-0303 July 1996 Part 21 Rept Re Piping (Small Portion of Unmelted Matl Drawn Lengthwise Into Bar During Drawing Process) Defect That Existed in Bar as Received from Mill.Addl Insp Procedure for Raw Matl Instituted ML20107M8931995-10-31031 October 1995 Nonproprietary DPC Fuel Reconstitution Analysis Methodology ML17353A4341995-10-31031 October 1995 Rev 1 to BAW-2245, Initial Rt of Linde 80 Welds Based on Fracture Toughness in Transition Range. ML17264A1181995-07-31031 July 1995 Response to Part (1) of GL 92-01,Rev 1,Suppl 1. ML20086M0851995-06-29029 June 1995 DPC TR QA Program ML20077R3631994-12-31031 December 1994 Monthly Operating Repts for Dec 1994 for Bfnpp ML20236L5971994-12-29029 December 1994 SER in Response to 940314 TIA 94-012 Requesting NRR Staff to Determine Specific Mod to Keowee Emergency Power Supply Logic Must Be Reviewed by Staff Prior to Implementation of Mod ML20064L2001994-01-31031 January 1994 Final Rept EPRI TR-103591, Burnup Verification Measurements on Spent-Fuel Assemblies at Oconee Nuclear Station ML20062K7481993-12-0101 December 1993 ISI Rept for Unit 2 McGuire 1993 Refueling Outage 8 ML20056E5171993-08-31031 August 1993 Technical Review Rept, Tardy Licensee Actions ML20046C1291993-08-0202 August 1993 LER 93-007-00:on 930701,determined That Unit 1 Ssf Rc Makeup Sys Inoperable in Past Due to Design Deficiency.Operations Procedures Revised to Reflect Newly Calculated Operating Limits for Rc Makeup Pump,Rcps & RCS.W/930802 Ltr ML20056G0131993-07-27027 July 1993 Rev 0 to ISI Rept Unit 2 Oconee 1993 Refueling Outage 13 ML20044G5311993-05-26026 May 1993 Suppl to 921207 Part 21 Rept Re Declutch Sys Anomaly in Certain Types of Valve Actuators Supplied by Limitorque Corp.Limitorque Designed New Declutch Lever Which Will Be Available in First Quarter 1993 ML20126J5961992-12-31031 December 1992 Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl ML20117A5981992-11-23023 November 1992 Special Rept:On 921119,ability of Control Battery Racks to Withstand Seismic Event Could Not Be Confirmed & Batteries Declared Inoperable.Batteries Expected to Be Restored in TS Required Time ML20097G0421992-05-31031 May 1992 Analysis of Capsule OCIII-D Duke Power Company Oconee Nuclear Station Unit-3 ML20077D0671991-11-15015 November 1991 Nonproprietary Version of Rev 0 to Boric Acid Corrosion of Oconee Unit 1 Upper Tubesheet ML20067A5241990-12-31031 December 1990 Final Submittal in Response to NRC Bulletin 88-011, 'Pressurizer Surge Line Thermal Stratification.' ML20042F3541990-04-30030 April 1990 Special Rept Re Failure to Prevent Performance Degradation of Reactor Bldg Cooling Units.Caused by Mgt Deficiency & Inadequate Program.Cooling Unit Declared Inoperable & Removed from Svc for Cleaning & Placed Back in Operation ML17348A1621990-03-27027 March 1990 Part 21 Rept Re Matls W/Programmatic Defects Supplied by Dubose Steel,Inc.Customers,Purchase Order,Items & Affected Heat Numbers Listed ML19332D5391989-10-31031 October 1989 Core Thermal-Hydraulic Methodology Using VIPRE-01. ML20042F2321989-08-31031 August 1989 Nonproprietary DCHF-1 Correlation for Predicting Critical Heat Flux in Mixing Vane Grid Fuel Assemblies. ML20205F3211988-10-10010 October 1988 Part 21 Rept Re Potential Deviation from Tech Spec Concerning Ry Indicators Due to Operating Temp Effect on Analog Meter Movement.Initially Reported on 881006.Customers Verbally Notified on 881006-07 ML20154K2091988-09-0909 September 1988 Rev 0 to Response to NRC Bulletin 88-005,Nonconforming Matls Supplied by Piping Supplies,Inc at Folsom,Nj & West Jersey Mfg Co.... Proprietary Procedure 1404.1, Leeb Hardness Testing (Equotip).... Encl.Procedure Withheld ML20245D9541988-09-0606 September 1988 Part 21 Rept Re Condition Involving Inconel 600 Matl Used to Fabricate Steam Generator Tube Plugs & Found to Possess Microstructure Susceptible to Stress Corrosion Cracking ML20245B6061988-08-31031 August 1988 Inadequate NPSH in HPSI Sys in Pwrs, Engineering Evaluation Rept ML20239A6991987-11-30030 November 1987 Addendum 1 to Rev 2 to Integrated Reactor Vessel Matl Surveillance Program (Addendum) ML20236T0791987-11-25025 November 1987 Advises LER 269/87-09,re Degradation of More than One Functional Unit of Emergency Power Switching Logic for Units 2 & 3,in Preparation & Will Be Submitted by 871215. Incident Originally Discussed in Special Rept ML20236Q9491987-10-31031 October 1987 Monthly Operating Repts for Oct 1987 ML20235W9611987-09-30030 September 1987 Monthly Operating Repts for Sept 1987 ML20234B1861987-08-31031 August 1987 Monthly Operating Repts for Aug 1987 ML20237K4761987-07-31031 July 1987 Monthly Operating Repts for Jul 1987 ML20236Y0221987-07-0808 July 1987 Safety Evaluation Clarifying Determination of Acceptability of Test Duration for Performance of Integrated Leak Rate Test at Plant ML20235S6311987-06-30030 June 1987 Monthly Operating Repts for June 1987 1999-01-05 |
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