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| Issue date | Title | Topic | |
|---|---|---|---|
| HL-5657, Ro:On 980626,noted That Pami Channels Had Been Inoperable for More than Thirty Days.Cause Indeterminate.Licensee Will Replace Automatic Function W/Five Other Qualified Pamis of Like Kind in Drywell & Revised Procedures | 30 July 1998 | Ro:On 980626,noted That Pami Channels Had Been Inoperable for More than Thirty Days.Cause Indeterminate.Licensee Will Replace Automatic Function W/Five Other Qualified Pamis of Like Kind in Drywell & Revised Procedures | Post Accident Monitoring |
| HL-5278, Special Rept:On 961203,30 Days Elapsed Since Position Indication Light for MSIV 1B21-F022D Declared Inoperable. Caused by Limit Switch Out of Proper Adjustment for Power Conditions.Light Will Be Restored During Next Outage | 11 December 1996 | Special Rept:On 961203,30 Days Elapsed Since Position Indication Light for MSIV 1B21-F022D Declared Inoperable. Caused by Limit Switch Out of Proper Adjustment for Power Conditions.Light Will Be Restored During Next Outage | Post Accident Monitoring |
| HL-5212, Special Rept:On 960721,flood-up Range Reactor Vessel Water Level Instrument 1B21-R605 Out of Svc for Greater than 30 Days.Caused by Packing Leak on Equalizing Valve.Packing Leak on Equalizing Valve Repaired | 30 July 1996 | Special Rept:On 960721,flood-up Range Reactor Vessel Water Level Instrument 1B21-R605 Out of Svc for Greater than 30 Days.Caused by Packing Leak on Equalizing Valve.Packing Leak on Equalizing Valve Repaired | Reactor Vessel Water Level Packing leak Post Accident Monitoring |
| HL-5096, Special Rept 1-95-004:on 951215,emergency Light 1R42-E125 Declared Inoperable for More than 14 Days.Caused by Result of Broken Battery Terminal Discovered During Routine Surveillance Testing.Battery Replaced | 9 January 1996 | Special Rept 1-95-004:on 951215,emergency Light 1R42-E125 Declared Inoperable for More than 14 Days.Caused by Result of Broken Battery Terminal Discovered During Routine Surveillance Testing.Battery Replaced | Emergency Lighting Fire Protection Program |
| HL-5082, Special Rept I-95-003:on 951117,fire Door 1L-48-1C50 Remained Inoperable for Longer than 14 Days.Caused by Component Failure Resulting from High Usage.Appropriate Fire Detectors Verified | 7 December 1995 | Special Rept I-95-003:on 951117,fire Door 1L-48-1C50 Remained Inoperable for Longer than 14 Days.Caused by Component Failure Resulting from High Usage.Appropriate Fire Detectors Verified | Safe Shutdown Fire Barrier Continuous fire watch Fire Watch Hourly Fire Watch |
| HL-5073, Special Rept 2-95-003:on 951029,fire Door 2L48-2R23 Had Remained Inoperable for More than 14 Days to Support Scheduled Refueling Outage Work.Fire Door 2L48-2R23 Restored to Operable Status on 951031 | 28 November 1995 | Special Rept 2-95-003:on 951029,fire Door 2L48-2R23 Had Remained Inoperable for More than 14 Days to Support Scheduled Refueling Outage Work.Fire Door 2L48-2R23 Restored to Operable Status on 951031 | Safe Shutdown Fire Barrier Continuous fire watch Hourly Fire Watch |
| HL-4876, Special Rept:On 950516,fire Doors Blocked Open in Controlled Manner to Provide Addl Cooling for Plant RPS motor-generator Set Rooms.Cause Due to Controlled Actions of Appropriate Personnel.Doors Restored to Operable Status | 21 June 1995 | Special Rept:On 950516,fire Doors Blocked Open in Controlled Manner to Provide Addl Cooling for Plant RPS motor-generator Set Rooms.Cause Due to Controlled Actions of Appropriate Personnel.Doors Restored to Operable Status | Safe Shutdown Fire Barrier Continuous fire watch Hourly Fire Watch |
| HL-4773, Special Rept:On 950113,monitor Displayed Microcomputer Error Code Indicating Inoperability of Flow Transducer in Sampling Sys.Caused by Component Failure.Several Components Replaced or Adjusted in Accordance W/Mfg Recommendations | 27 January 1995 | Special Rept:On 950113,monitor Displayed Microcomputer Error Code Indicating Inoperability of Flow Transducer in Sampling Sys.Caused by Component Failure.Several Components Replaced or Adjusted in Accordance W/Mfg Recommendations | |
| 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 Detectors | 17 January 1995 | 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 Detectors | |
| HL-4727, Special Rept:On 941007,discovered That Required Hourly Fire Watch Patrol Initiated for Fire Area 0040 on 920629 Inappropriately Terminated Due to Personnel Error.Hourly Fire Watch Patrol for Affected Area re-established | 31 October 1994 | Special Rept:On 941007,discovered That Required Hourly Fire Watch Patrol Initiated for Fire Area 0040 on 920629 Inappropriately Terminated Due to Personnel Error.Hourly Fire Watch Patrol for Affected Area re-established | Safe Shutdown Continuous fire watch Fire Watch Hourly Fire Watch |
| HL-4693, Special Rept 1-94-001:on 940911,seven Days Elapsed Since Main Stack post-accident Effluent Monitoring Sys Declared Inoperable Due to Damage to Sys Electronics by Lightning. Sys Expected to Be Returned to Svc by 940921 | 15 September 1994 | Special Rept 1-94-001:on 940911,seven Days Elapsed Since Main Stack post-accident Effluent Monitoring Sys Declared Inoperable Due to Damage to Sys Electronics by Lightning. Sys Expected to Be Returned to Svc by 940921 | Grab sample |
| HL-4590, Special Rept 2-94-001:on 940517,fire Rated Assembly Was Inoperable for Longer than 14 Days as Result of Planned Activities.Caused by Affected Assemblies & Sealed Devices | 17 May 1994 | Special Rept 2-94-001:on 940517,fire Rated Assembly Was Inoperable for Longer than 14 Days as Result of Planned Activities.Caused by Affected Assemblies & Sealed Devices | Safe Shutdown Continuous fire watch Hourly Fire Watch |
| HL-3434, Special Rept 1-93-004:on 930512,discovered That Cable Trays TFQ5-01 & TFR3-01 Were Not Enclosed in Thermo-Lag 330-1 Fire Barrier Matl,Per Safe Shutdown Analysis Rept.Caused by Inadequate Design.Appropriate Fire Detectors Verified | 30 August 1993 | Special Rept 1-93-004:on 930512,discovered That Cable Trays TFQ5-01 & TFR3-01 Were Not Enclosed in Thermo-Lag 330-1 Fire Barrier Matl,Per Safe Shutdown Analysis Rept.Caused by Inadequate Design.Appropriate Fire Detectors Verified | Safe Shutdown Fire Barrier Continuous fire watch Fire Watch Hourly Fire Watch |
| HL-3054, Special Rept 2-92-005:on 921102,battery-powered Emergency Lighting Unit Inoperable for More than 72 H.Caused by Failure of Lighting Unit to Pass Regularly Scheduled Maint. Lighting Unit Replaced & Verified Operable | 2 December 1992 | Special Rept 2-92-005:on 921102,battery-powered Emergency Lighting Unit Inoperable for More than 72 H.Caused by Failure of Lighting Unit to Pass Regularly Scheduled Maint. Lighting Unit Replaced & Verified Operable | Emergency Lighting |
| HL-2937, Special Rept 1-92-002:on 920911,fire Barrier Assembly Inoperable for Longer than 14 Days Due to Cavity in 3 H Fire Rated Wall.Cause of Cavity Unknown.Cavity in Wall Repaired Under Mwo 1-92-4244 on 920918 | 7 October 1992 | Special Rept 1-92-002:on 920911,fire Barrier Assembly Inoperable for Longer than 14 Days Due to Cavity in 3 H Fire Rated Wall.Cause of Cavity Unknown.Cavity in Wall Repaired Under Mwo 1-92-4244 on 920918 | Fire Barrier Fire Watch Hourly Fire Watch |
| HL-2380, Special Rept 1-92-001:on 920804,during Monthly Operability Test on Lighting Unit 1R42-E130,light Failed to Illuminate. Caused by Failure of battery-powered Emergency Lighting Unit to Pass Scheduled Surveillance.Subj Unit Replaced | 28 August 1992 | Special Rept 1-92-001:on 920804,during Monthly Operability Test on Lighting Unit 1R42-E130,light Failed to Illuminate. Caused by Failure of battery-powered Emergency Lighting Unit to Pass Scheduled Surveillance.Subj Unit Replaced | Emergency Lighting |
| HL-2341, Special Rept 2-92-004:on 920630,battery Powered Emergency Lighting Units Inoperable for Period Greater than 72 H.Event Had No Adverse Impact on Nuclear Safety.Battery Discharge Test Performed | 30 July 1992 | Special Rept 2-92-004:on 920630,battery Powered Emergency Lighting Units Inoperable for Period Greater than 72 H.Event Had No Adverse Impact on Nuclear Safety.Battery Discharge Test Performed | Emergency Lighting |
| HL-2247, Special Rept:On 920506,discovered That Annual 8 H Battery Discharge Test on Lighting Unit 2R242-E104 Had Not Been Performed in 1991.Caused by Personnel error.Battery-powered Emergency Lighting Demonstrated Operable | 5 June 1992 | Special Rept:On 920506,discovered That Annual 8 H Battery Discharge Test on Lighting Unit 2R242-E104 Had Not Been Performed in 1991.Caused by Personnel error.Battery-powered Emergency Lighting Demonstrated Operable | Emergency Lighting Missed surveillance |
| HL-2203, Special Rept 2-92-002:on 920407,signal from Triaxial Time History Accelerometer Contained Excessive Amount of Noise & Instrument Declared Inoperable for More than 30 Days.Cause Not Determined.Root Cause Analysis Underway | 11 May 1992 | Special Rept 2-92-002:on 920407,signal from Triaxial Time History Accelerometer Contained Excessive Amount of Noise & Instrument Declared Inoperable for More than 30 Days.Cause Not Determined.Root Cause Analysis Underway | Earthquake |
| 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 Replaced | 5 December 1991 | 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 Replaced | Grab sample |
| 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 Status | 22 November 1991 | 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 Status | Safe Shutdown Fire Barrier Continuous fire watch Hourly Fire Watch |
| 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 Procedures | 8 November 1991 | 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 Procedures | Missed surveillance Continuous fire watch |
| 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 Performed | 31 October 1991 | 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 Performed | Emergency Lighting |
| 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 Installed | 9 October 1991 | 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 Installed | Fire Barrier Hourly Fire Watch |
| 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 Sealed | 8 October 1991 | 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 Sealed | Safe Shutdown Fire Barrier Temporary Modification Hourly Fire Watch |
| ML20082B730 | 9 July 1991 | Special Rept:On 910515 & 0613,cable Penetration Seals Discovered Inoperable & Left in Untested Configuration. Caused by Personnel Error.Hourly Fire Watch Initiated & Penetrations Covered W/Thermolag Fire Barrier Matl | Fire Barrier Fire Protection Program Hourly Fire Watch |
| 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 Nozzles | 21 June 1991 | 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 Nozzles | Safe Shutdown Fire Barrier Continuous fire watch |
| ML20079B918 | 14 June 1991 | Special Rept 1-91-005:on 910515,fire Barrier Assemblies Inoperable for Longer than 14 Days.Caused by Personnel Error.Penetration Declared Inoperable & Required Hourly Fire Watch Established | Fire Barrier Fire Protection Program Fire Watch Hourly Fire Watch |
| 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 Reinstalled | 7 June 1991 | 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 Reinstalled | Safe Shutdown Fire Barrier Continuous fire watch Fire Watch 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 Insp | 6 June 1991 | 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 Insp | Emergency Lighting |
| 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 Repaired | 21 May 1991 | 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 Repaired | Safe Shutdown Fire Barrier Hourly Fire Watch |
| 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 Ordered | 2 April 1991 | 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 Ordered | Safe Shutdown Continuous fire watch Fire Watch Hourly Fire Watch |
| 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 Revised | 25 March 1991 | 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 Revised | Emergency Lighting Missed surveillance |
| HL-1492, Ro:On 910214,potential Malfunction of SRVs Suspected. Caused by Turbine Trip & Reactor Scram Valve Testing. Investigation of Malfunction Planned | 15 February 1991 | Ro:On 910214,potential Malfunction of SRVs Suspected. Caused by Turbine Trip & Reactor Scram Valve Testing. Investigation of Malfunction Planned | |
| 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 Engineering | 14 February 1991 | 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 Engineering | |
| HL-1488, Ro:On 910212,potential Malfunction of SRVs Suspected.Caused by Turbine Trip & Re Actor Scram.Investigation of Malfunction Planned | 13 February 1991 | Ro:On 910212,potential Malfunction of SRVs Suspected.Caused by Turbine Trip & Re Actor Scram.Investigation of Malfunction Planned | |
| ML20062G364 | 16 November 1990 | Special Rept:On 901108,reactor Bldg Ventilation Accident Range Radiation Monitor Inoperable for More than Seven Days. Caused by Component Failure.Reactor Bldg Accident Range Radiation Monitor Declared Inoperable | |
| 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 Initiated | 15 November 1990 | 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 Initiated | Safe Shutdown Continuous fire watch Fire Watch Hourly Fire Watch |
| ML20059G313 | 4 September 1990 | Special Rept 90-004:on 900810,fire-rated Assembly Inoperable for Longer than 14 Days.Caused by Component Failure.Hourly Fire Watch Maintained & Fire Damper Replaced | Safe Shutdown Fire Barrier Continuous fire watch Fire Watch Hourly Fire Watch |
| 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 Initiated | 29 August 1990 | Special Rept 90-001:on 900730,fire-rated Assembly Declared Inoperable for More than 14 Days.Caused by Personnel Error. Hourly Fire Watch Initiated | Safe Shutdown Continuous fire watch Fire Watch Hourly Fire Watch |
| ML20246J284 | 28 August 1989 | Special Rept 1-89-002:on 890803,power Cables to Battery Powered Emergency Lighting Units Disconnected.Caused by Plant Mod Activity Which Resulted in Inoperability of Several Battery Powered Emergency Lighting Units for 72 H | Emergency Lighting |
| ML20246F754 | 5 July 1989 | Special Rept 89-004:on 890525,sealing Devices for Penetrations in 3 H fire-rated East Wall Breached in Excess of 14 Days.Breach Necessitated by Scheduled Work Activities. Penetrations Sealed,Inspected & Declared Operable on 890608 | Continuous fire watch Hourly Fire Watch |
| ML20244B806 | 8 June 1989 | Special Rept 89-003:on 890509,smoke Detectors Left Inoperable W/O Compensatory Measures Being Taken.Caused by Failure to Reset Alarm at Slave Panel.Smoke Detectors in Battery Rooms Replaced W/Heat Detectors | Safe Shutdown Fire Barrier Fire Watch |
| ML20247K412 | 24 May 1989 | Special Rept 89-002:on 890414,signal from Triaxial Time History Accelerograph Located Inside Drywell Determined to Contain Excessive Amount of Noise & Declared Inoperable for More than 30 Days.Cause of Event Not Determined | Earthquake |
| ML20236B507 | 14 March 1989 | Special Rept 89-001:on 890216,fire Door Not Restored to Operable Status within 14 Days.Caused by Use of Structural Grouting Procedure Instead of Cosmetic Grouting Procedure. Grouting Placed Underneath Door & Individuals Counseled | Safe Shutdown Fire Barrier Hourly Fire Watch |
| ML20235U820 | 28 February 1989 | Special Rept 89-001:on 890120,fire-rated Assemblies Inoperable for More than 14 Days.Caused by Inadequate Design.Limiting Condition for Operation Established for Each Identified Deficiencies | Safe Shutdown Fire Barrier Continuous fire watch Fire Watch Hourly Fire Watch |
| ML20196F018 | 7 December 1988 | Special Rept 88-008:on 881101,fire Watch Not Established & Fire Rated Assembly Not Restored to Operable Condition within 14 Days as Required.Event Had No Adverse Impact on Plant Safety.Personnel Counseled & Cable Tray Encl Modified | Fire Barrier Continuous fire watch Fire Watch Hourly Fire Watch |
| ML20196E472 | 2 December 1988 | Special Rept 88-005:on 881105,emergency Light Inoperable for Longer than 24 H Period.Caused by Depleted/Dead Battery. Maint Personnel Replaced Dead Battery Under MWO-2-88-4353 | Emergency Lighting |
| ML20151F008 | 21 July 1988 | Special Rept 88-005:on 880505,fire Wrap Not Installed on Cable Raceways.Caused by Inadequate Guidance Re Application of App R Requirements.Limiting Condition for Operation Established for Each Individual Raceways | Fire Barrier Hourly Fire Watch |
| ML20196C287 | 22 June 1988 | Special Rept 88-004:on 880523,determined That Fire Doors W/ Automatic hold-open & Release Mechanisms Were Not Being Verified to Be Free of Obstructions at Least Once Per 24 H as Required.Caused by Inadequate Administrative Controls | Safe Shutdown Fire Barrier |