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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20148S314 | 30 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 | |
| ML20117A598 | 23 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 | |
| ML20236T079 | 25 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 | |
| ML20210J667 | 3 February 1987 | Special Rept:On 861113-14,1206 & 23,spurious Fire Alarms Annunciated in Control Room.On 870118,unit Shut Down Due to Problems W/Detectors.Cause Undetermined.Technicians Investigating Potential Problem W/Detectors | Fire Watch Hourly Fire Watch |
| ML20215N401 | 20 October 1986 | Special Rept:On 860808,during Shutdown for Maint,Found Unidentified Wires in Environmentally Qualified Limitorque motor-operated Valves.Caused by Mfg Deficiency.Wires Replaced | Time of Discovery |
| ML20209C187 | 13 August 1986 | Special Rept:On 860707,fire Barrier Penetration Nonfunctional.Caused by Design Deficiency Due to Ineffective Communication Between Design Groups.Fire Watch Established. Notice Initiated Requiring Installation of Fire Wall | Fire Barrier Continuous fire watch Fire Watch Grace period |
| ML20212D222 | 29 July 1986 | Special Rept:On 860606,determined That Inadequate Assurance Existed Re Use of Qualified Grease in All Limitorque Operators.Appropriate Programs Not Updated to Reflect Revs. Lubrication Records Reviewed | |
| ML20210N564 | 14 April 1986 | Special Rept:On 860206,fire Wall Determined to Be Degraded. Caused by Personnel Failure to Recognize That Removing Small Amount of Pyrocrete Would Degrade Fire Wall.Fire Wall Repaired & Declared Fully Functional.Part 21 Related | Fire Barrier Fire Watch Hourly Fire Watch |
| ML20137D648 | 22 November 1985 | Ro:On 851119,Keowee Hydro Unit 2 Inoperable Beyond Oconee Tech Spec Limit Due to Burned Out Laminated Copper Connection Between Two Coils.Caused by Cracked Brazement. Connector & Field Coils Will Be Replaced | |
| ML20135D778 | 21 August 1985 | Ro:On 850722,CRD Dc Breaker CB-1 Failed Trip Time Requirement During Channel C Reactor Protective Sys on-line Test.Cause of Failure Could Not Be Determined.Failed CB-1 Breaker Placed in Tripped Position | |
| ML20129G044 | 24 May 1985 | Ro:On 850425,batch of Powdex Resin from Powdex Cells 1A & 1D Transferred to Chemical Treatment Pond 2 Instead of Powdex Backwash Tank.Caused by Misalignment of Valve CTP-7.Valve Correctly Positioned | |
| ML20108E534 | 14 February 1985 | Special Rept:On 850114,CRD Dc Breaker Failed Slow During Channel D Reactor Protective Sys on-line Test.Caused by Sticking Trip Latch Roller Bearings & Excessive Trip Latch Operating Torque.Breaker Front Frame Replaced | |
| ML20112D077 | 14 December 1984 | Special Rept:On 841109,many Fire Barriers Did Not Meet Surveillance Insp Acceptance Criteria & Declared Inoperable. Caused by Const/Installation Deficiency,Component Failure/ Malfunction & Some Unknown Causes.Firestops Repaired | Fire Barrier Fire Watch Hourly Fire Watch |
| ML20099E024 | 24 October 1984 | Special Rept:On 840927,discovered That Contaminated Oil Shipped to Lee Steam Station for Disposal by Incineration. Caused by Misinterpretation of Regulations.Shipments of Contaminated Oil Halted | |
| ML20093F191 | 8 October 1984 | RO 269/83-16,revising 831107 Commitment Re Completion Date of 850101 to Relocate Hydrogen Purge Unit Connection Near Permanent Hookup Connections on Each Unit for Hydrogen Recombiner | |
| ML20093L506 | 5 October 1984 | Special Rept:On 840906,batch of Powdex Resin from Powder Cells 2D & 2E Transferred from Plant to Chemical Treatment Pond 1 Instead of to Powdex Backwash Tank.Caused by Misalignment of Valves of Chemical Treatment Ponds 5 & 6 | |
| ML20106B479 | 3 October 1984 | Special Rept:On 840928,power Circuit Breaker 22 Explosively Short Circuited,Causing Power Circuit Breaker 9 to Open, Isolating 230 Kv Overhead Line from Primary OL Power Source. Breaker Reclosed | |
| ML20096A106 | 22 August 1984 | Suppl to Rev 1 to RO-287/83-13:containment Isolation Valve 3CS-5 Declared Inoperable Due to Leakage Past Seat. Investigation Into Valve Failure Conducted & Diaphragm Replaced | |
| ML20094N860 | 27 July 1984 | RO 269/83-20 Re Trip Shaft & Bearing Assembly Portions of CRD Breaker Front Frame Assemblies.Nine of 17 GE Frames Defective.Util Awaiting Schedule for Delivery of New Frames | |
| ML20092A429 | 6 June 1984 | Special Rept:On 840419,during Fuel Reshuffling for Cycle 8, Fuel Assembly FA 0297 Became Stuck in Fuel Location E-10 During Insertion & Fuel Assembly FA 029Q Damaged.Caused by Inadequate Procedure Change | |
| ML20092A384 | 30 April 1984 | Updated RO-269/83-20 Submitted on 840111 Re Two CRD Breakers Experiencing Delay During Testing.Ge Will Ship CRD Breaker Front Frame Assemblies on 840514.Installation Will Be Complete on All Three Units by 840731 | |
| ML20084G485 | 18 April 1984 | Updated RO 269/83-17:seals at Conduit Connections Defective. Scotchcast 9 Epoxy Resin Will Be Utilized to Seal Conduit Connections,Dow Corning RTV 3145 Applied to Conduit Fittings & Conduit/Cable Seals Will Be Upgraded | Moisture barrier |
| ML20082R756 | 2 December 1983 | Ro:On 831015-16,standby Bus 2 Deenergized to Verify Emergency Power Path & CT-3 Startup Transformer Locked Out. Caused by Failure of Two Insulators Causing Short to Ground. Info Supersedes 831101 Rept | |
| ML20082H516 | 21 November 1983 | Ro:Re Loss of Power on Both Standby Buses W/Both Units Out of Svc.Investigation Incomplete.Necessary Info Will Be Submitted by 831202 | |
| ML20082C608 | 14 November 1983 | Ro:On 831109,while Units Out of Svc for Planned Maint,Lee 6C Gas Turbine Tripped off-line,deenergizing Standby Buses & Placing Units in Degraded Mode Beyond Tech Spec Limit.Cause Undetermined.Next Rept by 831118 | Overspeed trip |
| ML20078P965 | 2 November 1983 | Ro:On 831028,while Unit Out of Svc,Lee 6C Gas Turbine Tripped & Deenergized Both 4,160-volt Standby Buses.Cause Unknown.Lee 5C Turbine Placed on-line to Sys Grid. Investigation Continuing | Overspeed trip |
| ML20081K095 | 1 November 1983 | Ro:On 831015-16,w/Unit 1 Out of Svc,Standby Bus 2 Deenergized to Allow Operability Verification of Underground Emergency Power Path in Accordance W/Tech Specs.On 831015, CT-3 Underwent Lockout.Caused by Bad Insulators | |
| ML20078P884 | 31 October 1983 | Ro:On 831026,w/unit Out of Svc for Maint,Lee Steam Station Gas Turbine Tripped,Deenergizing Both Standby Buses.Cause Not Determined.Redundant Buses Available | Overspeed trip |
| ML20081B252 | 17 October 1983 | Ro:On 831012,standby Buses Deenergized to Allow for Operability Performance Testing of Standby Bus Breakers Per Tech Specs.Testing Caused Degraded Mode Beyond Tech Spec Limit | |
| ML20078H412 | 4 October 1983 | Ro:On 830929,while Energizing 4,160-volt Standby Buses,Lee 6C Gas Turbine Tripped off-line,deenergizing Both Standby Buses & Placing Two Operating Units in Degraded Mode.Cause Undetermined Since Unit Has No Event Recorder | Overspeed trip |
| ML20080P327 | 27 September 1983 | Ro:On 830922,w/both Keowee Hydro Units Out of Svc for Planned Maint,Lee 6C Gas Turbine,Being Used to Energize Buses,Tripped Off Line.Both Standby Buses Deenergized & Units 1 & 3 Placed in Degraded Mode | |
| ML20080M026 | 16 September 1983 | Updated RO 287/83-07.Investigation Incomplete.Next Rept Expected by 831030 | |
| ML20080G235 | 6 September 1983 | RO 270/83-09:on 830802,hydraulic Snubber Noted Technically Inoperable for More than 72 H.Investigation Incomplete.Next Rept Will Be Submitted by 830912 | |
| ML20076C329 | 15 August 1983 | RO 287/83-07:followup to Rept Submitted on 830708. Investigation Incomplete.Supplemental Rept Expected by 830915 | |
| ML20072J203 | 24 June 1983 | Ro:On 830527,certain Containment Isolation Valves May Have Failed in non-ES Position Due to Loss of Dc Power. Investigation & Rept Will Be Completed & Reviewed by 830708 | |
| ML20073Q012 | 19 April 1983 | Corrected RO 269/83-07:on 830303,during Insp of Manual Containment Isolation Valves,Valve CF-19 Discovered Open. Caused by Personnel Error.Valve Closed.Core Flood Procedure & Reactor Bldg Manual Checklist Changed | |
| ML20069K414 | 15 April 1983 | Updated ROs 287/83-04,269/83-05 & 269/83-10:repts Being Reviewed & Will Be Submitted No Later than 830419 | |
| ML20072T701 | 30 March 1983 | RO-287/83-04 Will Not Be Submitted by 830331 as Planned.Rept Re Open Valve on Emergency Hatch Leak Rate Test Pressurization Line Incomplete.Rept to Be Submitted by 830414 | |
| ML20072T697 | 30 March 1983 | RO-269/83-10 Will Be Delayed Due to Continuing Investigation of Incident Re Partially Opened Interpersonnel Emergency Door Following Testing.Rept Should Be Submitted No Later than 830415 | |
| ML20073C407 | 25 March 1983 | Informs That RO-287/83-04 Not Reportable.Results of Seismic Analysis Indicate Letdown Line Was Seismically Operable W/Lead Blankets Attached.Pipe Stress,Support Restraint & Equipment Nozzle Loads within Allowable Limits | |
| ML20069E374 | 11 March 1983 | Ro:On 830225,reactor Protective Sys Pump Power Monitor Sys Failed to Meet Operability Requirements.Investigation Incomplete at Present Time.Rept Will Be Submitted by 830325 | |
| ML20070K585 | 23 December 1982 | Ro:On 821213,Region 2 Informed of Two Manual Containment Isolation Valves Discovered Open.Rept Providing Details Delayed Due to Investigation.Rept Will Be Completed & Submitted by 821231 | |
| ML20070K731 | 23 December 1982 | RO 287/82-14:primary to Secondary Leak Discovered in Steam Generator 3B.Rept Will Not Be Submitted Until 830107 Contrary to Previous Commitment | |
| ML20065L776 | 14 October 1982 | Ro:On 821014,Unit 2 Core Relief Valves Declared Inoperable Due to Analysis Prompted by B&W Safety Concern.Unit 3 Valves Were Offsite Undergoing Ring Adjustment.Immediate Shutdown of Unit 2 Commenced | |
| ML20063N279 | 7 September 1982 | Informs That RO-269/82-15 Re Electrically Inoperable Valve CCW-8 Will Be Submitted by 820921.Investigation Incomplete | |
| ML20063M085 | 3 September 1982 | Advises That RO-269/82-16 Re Separation of safety-related Cables Will Not Be Filed.Review & Evaluation Determined That Separation of Specified Cables Conforms to Established Criteria.No Further Action Required | |
| ML20063M103 | 1 September 1982 | Ro:On 820818,five Reactor Coolant Pump Closure Studs Determined to Be Degraded in Size Below Acceptable SAR limits.RO-287/82-09 Will Be Completed,Reviewed & Submitted by 820910 | |
| ML20062J172 | 5 August 1982 | RO 270/82-10:on 820722,util Informed NRC That Upper Surge Tank Indicator Read Below Tech Spec Min Required Water Level.Investigation & Preparation of Rept Incomplete.Final Review & Rept Expected by 820819 | |
| ML20071K347 | 20 July 1982 | RO 269/82-13:on 820706,emergency Feedwater Pump Declared Inoperable When Required Surveillance Testing Discovered Not Performed.Investigation & Rept Will Be Completed,Reviewed & Submitted by 820803 | |
| ML20058D829 | 16 July 1982 | RO 270/82-09:on 820616,valve 2FDW-316 Would Not Close Completely After Sampling & Affected Flow Path Declared Inoperable.Investigation & Rept Will Be Completed,Reviewed & Submitted on 820730 |