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05000321/LER-1979-082, Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly23 November 1982Updated LER 79-082/03X-2:on 790825-27,attempt to Perform RCIC Pump Operability Procedure Unsuccessful When Turbine Failed to Trip Upon Manual Signal.Caused by Burned Out Turbine Trip Actuator Coils & Binding Assembly
05000321/LER-1981-120, Updated LER 81-120/01T-1:on 811105,AE Advised That in Event of Main Steamline Break or Scram Discharge,Isolation of HPCI & Reactor Core Isolation Cooling Sys Could Occur.Caused by Erroneous Analysis.Event Would Not Occur3 August 1982Updated LER 81-120/01T-1:on 811105,AE Advised That in Event of Main Steamline Break or Scram Discharge,Isolation of HPCI & Reactor Core Isolation Cooling Sys Could Occur.Caused by Erroneous Analysis.Event Would Not Occur
05000366/LER-1980-096, Updated LER 80-096/03X-2:on 800619 & 27,w/reactor Mode Switch in Run,Reactor Bldg to Torus Vacuum Breaker Isolation Valve Failed to Open.Caused by Failure of D-P Switch to Actuate.Switch Replaced23 December 1982Updated LER 80-096/03X-2:on 800619 & 27,w/reactor Mode Switch in Run,Reactor Bldg to Torus Vacuum Breaker Isolation Valve Failed to Open.Caused by Failure of D-P Switch to Actuate.Switch Replaced
05000366/LER-1980-124, Updated LER 80-124/03X-1:on 800813 & 27,during Surveillance of Torus/Drywell Vacuum Breakers,J & I Breakers Failed to Give Proper Light Indication.Caused by Air Control Valves Being Out of Adjustment.Valves Adjusted & Breakers16 December 1982Updated LER 80-124/03X-1:on 800813 & 27,during Surveillance of Torus/Drywell Vacuum Breakers,J & I Breakers Failed to Give Proper Light Indication.Caused by Air Control Valves Being Out of Adjustment.Valves Adjusted & Breakers Tested
05000366/LER-1982-068, Updated LER 82-068/03X-1:on 820707 & 24,volumetric Weighted Average Drywell Air Temp Exceeded Tech Spec Limit of 135 F. Caused by High Ambient Temp & Failure of Alternate Chiller Fans 8B & 9B.New Chilling Units Installed26 October 1983Updated LER 82-068/03X-1:on 820707 & 24,volumetric Weighted Average Drywell Air Temp Exceeded Tech Spec Limit of 135 F. Caused by High Ambient Temp & Failure of Alternate Chiller Fans 8B & 9B.New Chilling Units Installed
05000366/LER-1983-040, Updated LER 83-040/03X-1:on 830709 & 14,control Rod Drive Low Pressure or High Level Alarm Received for HCV 2C11-26-31 & 02-29.Caused by Leaking EP-111 Nitrogen Charging Valves. Valves Replaced & HCVs Returned to Svc12 March 1984Updated LER 83-040/03X-1:on 830709 & 14,control Rod Drive Low Pressure or High Level Alarm Received for HCV 2C11-26-31 & 02-29.Caused by Leaking EP-111 Nitrogen Charging Valves. Valves Replaced & HCVs Returned to SvcTime of Discovery
05000366/LER-1983-055, Updated LER 83-055/03X-1:on 830713 & 21,RCIC Pump 2E51-C002 Would Not Deliver 600 Gpm Required Tech Spec Flow.Caused by Unadjusted Electric Governor Remote Actuator.Actuator Adjusted.W/Amended5 December 1983Updated LER 83-055/03X-1:on 830713 & 21,RCIC Pump 2E51-C002 Would Not Deliver 600 Gpm Required Tech Spec Flow.Caused by Unadjusted Electric Governor Remote Actuator.Actuator Adjusted.W/Amended
05000366/LER-1983-099, Updated LER 83-099/03X-1:on 830925 & 1005,hydrogen Dioxide Analyzer a Declared Inoperable During Procedure HNP-2-3882 & Out of Calibr,Respectively.Caused by Worn Diaphragms in Sample Pump a & Instrument Drift28 October 1983Updated LER 83-099/03X-1:on 830925 & 1005,hydrogen Dioxide Analyzer a Declared Inoperable During Procedure HNP-2-3882 & Out of Calibr,Respectively.Caused by Worn Diaphragms in Sample Pump a & Instrument DriftPost Accident Monitoring
05000366/LER-1983-126, Amended LER 83-126/03L-0:on 831113,safety Relief Valve Tailpipe Temp Recorder 2B21-B614 Observed Stamping Erratically.Caused by Component Failure.Advancing Mechanism, Solenoid & Arm & Hub Assembly Replaced5 December 1983Amended LER 83-126/03L-0:on 831113,safety Relief Valve Tailpipe Temp Recorder 2B21-B614 Observed Stamping Erratically.Caused by Component Failure.Advancing Mechanism, Solenoid & Arm & Hub Assembly Replaced
05000366/LER-1983-127, Amended LER 83-127/03L-0:on 831108,while Pumping Water from Drywell Equipment Drain Sump,Pump Discharge Valve 2G11-F018 Would Not Open.Sys Declared Inoperable.Caused by Blown Fuse in Valve Control Circuit5 December 1983Amended LER 83-127/03L-0:on 831108,while Pumping Water from Drywell Equipment Drain Sump,Pump Discharge Valve 2G11-F018 Would Not Open.Sys Declared Inoperable.Caused by Blown Fuse in Valve Control Circuit
05000366/LER-1984-001, Revised LER 84-001-01:on 840203,plant Personnel Detected Fracture in 66-inch Vent Header in Bay 5.Caused by Brittle Fracture of Vent Header Matl.Vent Header Will Be Repaired Prior to Startup21 March 1984Revised LER 84-001-01:on 840203,plant Personnel Detected Fracture in 66-inch Vent Header in Bay 5.Caused by Brittle Fracture of Vent Header Matl.Vent Header Will Be Repaired Prior to Startup
HL-0476, Special Rept 2-95-01:on 950110 Unit 2 Drywell High Range Radiation Inoperable Longer than 7 Days.Caused by Exceeding Procedural Limits of 34SV-SUV-019-2S.Technicians Checked High Voltage Power Supply Which Powers Radiation Detectors17 January 1995Special Rept 2-95-01:on 950110 Unit 2 Drywell High Range Radiation Inoperable Longer than 7 Days.Caused by Exceeding Procedural Limits of 34SV-SUV-019-2S.Technicians Checked High Voltage Power Supply Which Powers Radiation Detectors
HL-1191, Monthly Operating Repts for Aug 1990 for Hatch Units 1 & 231 August 1990Monthly Operating Repts for Aug 1990 for Hatch Units 1 & 2
HL-1259, Special Rept 90-001:on 900730,fire-rated Assembly Declared Inoperable for More than 14 Days.Caused by Personnel Error. Hourly Fire Watch Initiated29 August 1990Special Rept 90-001:on 900730,fire-rated Assembly Declared Inoperable for More than 14 Days.Caused by Personnel Error. Hourly Fire Watch InitiatedSafe Shutdown
Continuous fire watch
Fire Watch
Hourly Fire Watch
HL-1316, Monthly Operating Repts for Jan 1993 for Ei Hatch Nuclear Plant,Units 1 & 231 January 1993Monthly Operating Repts for Jan 1993 for Ei Hatch Nuclear Plant,Units 1 & 2
HL-1353, Special Rept 2-90-003 Re fire-rated Assemblies Inoperable W/O Hourly Fire Watch Maintained.Caused by Personnel Error. License Condition 2-90-332 Initiated15 November 1990Special Rept 2-90-003 Re fire-rated Assemblies Inoperable W/O Hourly Fire Watch Maintained.Caused by Personnel Error. License Condition 2-90-332 InitiatedSafe Shutdown
Continuous fire watch
Fire Watch
Hourly Fire Watch
HL-1360, Monthly Operating Repts for Hatch Units 1 & 2 for Oct 199031 October 1990Monthly Operating Repts for Hatch Units 1 & 2 for Oct 1990
HL-1398, Monthly Operating Repts for Nov 1990 for Hatch Units 1 & 230 November 1990Monthly Operating Repts for Nov 1990 for Hatch Units 1 & 2
HL-1434, Monthly Operating Repts for Dec 1990 for Hatch Units 1 & 231 December 1990Monthly Operating Repts for Dec 1990 for Hatch Units 1 & 2
HL-1470, Special Rept:On 901119,discrepancy Noted in Number of SRM & IRM Detectors During Inventory.Caused by Inadequate Recordkeeping Controls.Responsibility for Control & Accountability of Detectors Returned to Reactor Engineering14 February 1991Special Rept:On 901119,discrepancy Noted in Number of SRM & IRM Detectors During Inventory.Caused by Inadequate Recordkeeping Controls.Responsibility for Control & Accountability of Detectors Returned to Reactor Engineering
HL-1476, Monthly Operating Repts for Jan 1991 for Hatch Units 1 & 231 January 1991Monthly Operating Repts for Jan 1991 for Hatch Units 1 & 2
HL-1488, Ro:On 910212,potential Malfunction of SRVs Suspected.Caused by Turbine Trip & Re Actor Scram.Investigation of Malfunction Planned13 February 1991Ro:On 910212,potential Malfunction of SRVs Suspected.Caused by Turbine Trip & Re Actor Scram.Investigation of Malfunction Planned
HL-1492, Ro:On 910214,potential Malfunction of SRVs Suspected. Caused by Turbine Trip & Reactor Scram Valve Testing. Investigation of Malfunction Planned15 February 1991Ro:On 910214,potential Malfunction of SRVs Suspected. Caused by Turbine Trip & Reactor Scram Valve Testing. Investigation of Malfunction Planned
HL-1523, Monthly Operating Repts for Feb 1991 for Hatch Nuclear Plant Units 1 & 228 February 1991Monthly Operating Repts for Feb 1991 for Hatch Nuclear Plant Units 1 & 2
HL-1542, Special Rept:On 910301,battery-powered Emergency Lighting Units Inoperable for Period Greater than 72 H.Caused by Personnel Error.Units Restored to Operable Status on 910302 & Surveillance Procedure 42SV-FPX-003-0S Revised25 March 1991Special Rept:On 910301,battery-powered Emergency Lighting Units Inoperable for Period Greater than 72 H.Caused by Personnel Error.Units Restored to Operable Status on 910302 & Surveillance Procedure 42SV-FPX-003-0S RevisedEmergency Lighting
Missed surveillance
HL-1547, Special Rept 1-91-003:on 910318,during Monthly Insp of Fire Door 1L48-1C22,discovered That Door Inoperable for More than 14 Days Due to Worn Hinges,Plates & Shins.Caused by Normal Wear.Fire Watch Established & New Door Ordered2 April 1991Special Rept 1-91-003:on 910318,during Monthly Insp of Fire Door 1L48-1C22,discovered That Door Inoperable for More than 14 Days Due to Worn Hinges,Plates & Shins.Caused by Normal Wear.Fire Watch Established & New Door OrderedSafe Shutdown
Continuous fire watch
Fire Watch
Hourly Fire Watch
HL-1576, Monthly Operating Repts for Mar 1991 for Hatch Nuclear Plant Units 1 & 231 March 1991Monthly Operating Repts for Mar 1991 for Hatch Nuclear Plant Units 1 & 2
HL-1630, Monthly Operating Repts for Apr 1991 for Hatch Nuclear Plant Units 1 & 230 April 1991Monthly Operating Repts for Apr 1991 for Hatch Nuclear Plant Units 1 & 2
HL-1649, Special Rept:On 910420,fire Barrier Assemblies Inoperable for Period Longer than 14 Days Discovered During Insp.Caused by Personnel Error.Penetrations 2Z43-H66OC & 2Z43-HO27C Resealed & Partially Drilled Hole Repaired21 May 1991Special Rept:On 910420,fire Barrier Assemblies Inoperable for Period Longer than 14 Days Discovered During Insp.Caused by Personnel Error.Penetrations 2Z43-H66OC & 2Z43-HO27C Resealed & Partially Drilled Hole RepairedSafe Shutdown
Fire Barrier
Hourly Fire Watch
HL-1667, Special Rept 1-91-004:on 910502 & 06,listed battery-powered Emergency Lighting Units Inoperable for More than 72 H. Affected battery-powered Emergency Lighting Units Verified Operable by Performing Monthly Insp6 June 1991Special Rept 1-91-004:on 910502 & 06,listed battery-powered Emergency Lighting Units Inoperable for More than 72 H. Affected battery-powered Emergency Lighting Units Verified Operable by Performing Monthly InspEmergency Lighting
HL-1674, Special Rept 2-91-001:on 910320 & 0401,fire-rated Assemblies Inoperable for More than 14 Days Due to Reloading of Reactor Core & Planned Maint Activity,Respectively.Hourly Fire Watch Initiated & Set Room Walls Reinstalled7 June 1991Special Rept 2-91-001:on 910320 & 0401,fire-rated Assemblies Inoperable for More than 14 Days Due to Reloading of Reactor Core & Planned Maint Activity,Respectively.Hourly Fire Watch Initiated & Set Room Walls ReinstalledSafe Shutdown
Fire Barrier
Continuous fire watch
Fire Watch
Hourly Fire Watch
HL-1682, Rev 2 to Special Rept 1-91-005:on 910515,discovered That Cable Penetration Seal Assembly Not Installed Per Mfg Instructions & Barrier Inoperable for More than 14 Days. Hourly Fire Watch Established & Thermolag Barrier Installed9 October 1991Rev 2 to Special Rept 1-91-005:on 910515,discovered That Cable Penetration Seal Assembly Not Installed Per Mfg Instructions & Barrier Inoperable for More than 14 Days. Hourly Fire Watch Established & Thermolag Barrier InstalledFire Barrier
Hourly Fire Watch
HL-1684, Monthly Operating Repts for May 1991 for Hatch Nuclear Plant Units 1 & 231 May 1991Monthly Operating Repts for May 1991 for Hatch Nuclear Plant Units 1 & 2
HL-1691, Special Rept:On 910526,fixed Water Spray Nozzles Inoperable for Longer than 14 Days Identified During Insp of Fire Sprinkler Sys.Cause Indeterminate.Conduits Routed Away from Vicinity of Spray Nozzles21 June 1991Special Rept:On 910526,fixed Water Spray Nozzles Inoperable for Longer than 14 Days Identified During Insp of Fire Sprinkler Sys.Cause Indeterminate.Conduits Routed Away from Vicinity of Spray NozzlesSafe Shutdown
Fire Barrier
Continuous fire watch
HL-1730, Monthly Operating Repts for June 1991 for Ei Hatch Units 1 & 230 June 1991Monthly Operating Repts for June 1991 for Ei Hatch Units 1 & 2
HL-1766, Monthly Operating Repts for Jul 1991 for Ei Hatch Nuclear Plant,Units 1 & 231 July 1991Monthly Operating Repts for Jul 1991 for Ei Hatch Nuclear Plant,Units 1 & 2
HL-1828, Monthly Operating Repts for Aug 1991 for Plant Hatch,Units 1 & 231 August 1991Monthly Operating Repts for Aug 1991 for Plant Hatch,Units 1 & 2
HL-1861, Special Rept 1-91-007:on 910909 & 16,fire Barrier Assemblies Inoperable for More than 14 Days When Unsealed Drilled Hole & Unsealed Penetration Discovered.Caused by Personnel Error.Hole Repaired & Penetration Sealed8 October 1991Special Rept 1-91-007:on 910909 & 16,fire Barrier Assemblies Inoperable for More than 14 Days When Unsealed Drilled Hole & Unsealed Penetration Discovered.Caused by Personnel Error.Hole Repaired & Penetration SealedSafe Shutdown
Fire Barrier
Temporary Modification
Hourly Fire Watch
HL-1868, Monthly Operating Repts for Sept 1991 for Hatch,Units 1 & 230 September 1991Monthly Operating Repts for Sept 1991 for Hatch,Units 1 & 2
HL-1891, Special Rept 2-91-003:on 911003,during Performance of Battery Discharge Test,Two Emergency Lighting Units Failed to Illuminate for 8 H & Could Not Be Restored within 72 H. Lighting Units Repaired & Discharge Test Performed31 October 1991Special Rept 2-91-003:on 911003,during Performance of Battery Discharge Test,Two Emergency Lighting Units Failed to Illuminate for 8 H & Could Not Be Restored within 72 H. Lighting Units Repaired & Discharge Test PerformedEmergency Lighting
HL-1916, Special Rept 1-91-008:on 911014,four Suppression Sys Flooding Valves in Fixed Water Suppression Sys Not Surveilled Once Per 18 Months.Caused by Less than Adequate Procedure.Valves Tested & Inspected Per Revised Procedures8 November 1991Special Rept 1-91-008:on 911014,four Suppression Sys Flooding Valves in Fixed Water Suppression Sys Not Surveilled Once Per 18 Months.Caused by Less than Adequate Procedure.Valves Tested & Inspected Per Revised ProceduresMissed surveillance
Continuous fire watch
HL-1922, Monthly Operating Repts for Oct 1991 for Ei Hatch,Units 1 & 231 October 1991Monthly Operating Repts for Oct 1991 for Ei Hatch,Units 1 & 2
HL-1941, Special Rept 1-91-009:from 910929-1029,all Fuel Removed from Reactor Vessel & Fire Barriers Inoperable for More than 14 Days.Caused by Need to Install Support Plates,Platforms & Conduits.Structural Beams Restored to Operable Status22 November 1991Special Rept 1-91-009:from 910929-1029,all Fuel Removed from Reactor Vessel & Fire Barriers Inoperable for More than 14 Days.Caused by Need to Install Support Plates,Platforms & Conduits.Structural Beams Restored to Operable StatusSafe Shutdown
Fire Barrier
Continuous fire watch
Hourly Fire Watch
HL-1967, Special Rept 1-91-010:on 911121,discovered That Blue Pen of post-accident Effluent Monitoring Sys Recorder 1D11-R631 Spiking Upscale at Regular Interval.Caused by Failed Flow Transducer.Flow Transducer Replaced5 December 1991Special Rept 1-91-010:on 911121,discovered That Blue Pen of post-accident Effluent Monitoring Sys Recorder 1D11-R631 Spiking Upscale at Regular Interval.Caused by Failed Flow Transducer.Flow Transducer ReplacedGrab sample
HL-1971, Monthly Operating Repts for Nov 1991 for Ei Hatch Nuclear Plant Unit 130 November 1991Monthly Operating Repts for Nov 1991 for Ei Hatch Nuclear Plant Unit 1
HL-2010, Monthly Operating Repts for Dec 1991 for Ei Hatch Nuclear Plant Unit 131 December 1991Monthly Operating Repts for Dec 1991 for Ei Hatch Nuclear Plant Unit 1
HL-2040, Monthly Operating Repts for Jan 1992 for Ei Hatch Nuclear Plant Units 1 & 231 January 1992Monthly Operating Repts for Jan 1992 for Ei Hatch Nuclear Plant Units 1 & 2
HL-2074, Ei Hatch Nuclear Plant - Units 1 & 2 Annual Operating Rept, 199131 December 1991Ei Hatch Nuclear Plant - Units 1 & 2 Annual Operating Rept, 1991Safe Shutdown
Shutdown Margin
High Radiation Area
Anticipated operational occurrence
Weld Overlay
Operating Basis Earthquake
Nondestructive Examination
Abnormal operational transient
Design basis earthquake
Process Control Program
Earthquake
Fire Protection Program
HL-2107, Monthly Operating Repts for Feb 1992 for Ei Hatch Units 1 & 229 February 1992Monthly Operating Repts for Feb 1992 for Ei Hatch Units 1 & 2
HL-2172, Monthly Operating Repts for Mar 1992 for Ei Hatch Nuclear Plant Units 1 & 231 March 1992Monthly Operating Repts for Mar 1992 for Ei Hatch Nuclear Plant Units 1 & 2
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