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This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.
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- TAC:L30812 + (03:21:41, 27 June 2025)
- 05000341/LER-1987-042, :on 870902,control Ctr HVAC Sys Shifted to Chlorine Mode W/No Chlorine Present.Cause Unknown. Availability & Design of Less Radio Frequency Sensitive Detectors Under Study.Radio Use Restricted + (03:24:57, 27 June 2025)
- 05000458/LER-1987-030, :on 871118,failure to Perform Temp Monitoring on Reactor Plant Component Cooling Water Sys Areas,Per Tech Spec 3.7.8 Discovered.Investigation of Cause Inconclusive. Surveillance Test Procedures Revised + (03:26:03, 27 June 2025)
- 05000293/LER-1998-018, :on 980722,noted That EDGs Were Inoperable Due to Ambient Air Temp Exceeding 88 F.Caused by Inadequate EDG Cooling & Bldg Ventilation Design.Will Develop EDG Cooling & Bldg Ventilation Mods W/Regard to Exceedance of Site Temp + (03:27:09, 27 June 2025)
- TAC:M99207 + (03:27:55, 27 June 2025)
- 05000285/LER-1998-009, :on 980722,WDS CIV Was Noted Outside Design Basis.Caused by Inadequate Design Interface W/Existing Sys. HCV-500A Was Repaired,Tested & Returned to Service on 980626 + (03:31:16, 27 June 2025)
- 05000336/LER-1998-005, :on 980318,HELB Deficiencies for Piping Inside Containment Was Noted.Caused by Inadequate Consideration of HELB Requirements.Rept Was Submitted to NRC Discussing Applicability of leak-before-break Methodology + (03:33:31, 27 June 2025)
- 05000302/LER-1987-029, :on 871118,determined That Monthly Surveillance for Liquid Process & Effluent Radiation Monitors Not Performed & Three Surveillances Exceeded by One Day.Caused by Personnel Error.Personnel Instructed + (03:33:34, 27 June 2025)
- 05000341/LER-1996-005, :on 960327,declared EECW Inoperable & TS Required Shutdown Commenced Due to Design Issue.Design Mod Implemented to Provide SR make-up Sources for Both make-up Water & Nitrogen to EECW make-up Tank + (03:34:32, 27 June 2025)
- 05000293/LER-1997-025, :on 971123,completion of Required Shutdown Was Noted Due to Two Inoperable Msivs.Cause of Failure of Vessel Flange Thermocouples Could Not Be Conclusively Determined. Rv Flange Thermocouples Will Be Restored + (03:35:00, 27 June 2025)
- 05000424/LER-1987-067, :on 871116,room Temp Reading of Auxiliary Bldg Room 110 Not Taken Per Tech Specs.Caused by Shift Supervisor Failure to Recognize Importance of Readings.Personnel Involved Counseled + (03:35:30, 27 June 2025)
- 05000213/LER-1987-018, :on 871120,motor-operated Valves Determined Not to Be in Qualified Configuration Declared Inoperable Due to Grease Installed in Motor Housing.Caused by Inadequate Maint Procedure & Technical Info + (03:36:06, 27 June 2025)
- 05000289/LER-1998-007, Forwards LER 98-007-00, Inoperable Intake Screen & Pump House Floor Drain Check Valves Due to Lack of Preventive Maint & Periodic Insps, Per 10CFR50.73.Rept Was Evaluated & Determined Reportable on 980720.W/o Encl + (03:36:33, 27 June 2025)
- 05000327/LER-1987-073, :on 871110,determined That Centrifugal Charging Pumps May Not Start Using Manual Handswitch & May Not Be Available to Mitigate Consequences of Postulated Accident. Caused by Inadequate Review of Design Info + (03:56:58, 27 June 2025)
- 05000361/LER-1998-015, :on 980717,non-isokinetic Sampling of Airborne Effluent Streams Occurred.Caused by Personnel Error. Procedures Revised + (03:59:44, 27 June 2025)
- 05000327/LER-1987-072, :on 871110,ESF Equipment Room Coolers Inadequate to Maintain Temps within Environ Qualification Profiles.Caused by Inadequate Design Control Program.Duct Work to Be Revised & Filtration Sys Installed + (04:00:16, 27 June 2025)
- 05000352/LER-1987-023, :on 870611,ESF Actuated Due to Failure of Battery Charger 1A1D103.Caused by Failure of Integrated Circuit Controller Card.Undervoltage Relays Mfg by Brown Boveri Corp Will Be Replaced + (04:00:17, 27 June 2025)
- 05000454/LER-1998-005, Forwards Revised LER 98-005-00 Which Corrects Errors Involving Incorrect LER Number on Pages 2 Through 5.No New Commitments Made within Submittal + (04:00:22, 27 June 2025)
- TAC:53416 + (04:02:55, 27 June 2025)
- 05000304/LER-1985-029, :on 851201,purge Isolation Occurred.Caused by Spurious Spike on Monitor 2RT-PR09C Due to Voltage Spiking on Ac Power Feed to Monitor.Permanent Ac Line Filter Will Be Installed on Power Feed for Monitor + (04:04:58, 27 June 2025)
- 05000456/LER-1996-010-01, :on 960821,noted Failure to Comply W/Design Basis.Caused by Degradation of Boraflex in Spent Fuel Racks. Implemented Controls on SFP Boron Concentration & Silica Concentration + (04:05:13, 27 June 2025)
- ML20237A951 + (04:05:25, 27 June 2025)
- TAC:M99205 + (04:06:00, 27 June 2025)
- 05000298/LER-1987-024, :on 871106,HPCI Turbine Overspeed Trip Mechanism Failed to Automatically Reset During Testing Due to Binding of Tappet Assembly.Trip & Reset Function Checked Periodically Until Actions Received from GE + (04:07:11, 27 June 2025)
- 05000352/LER-1998-015, :on 950216,discovered That Error in Calibr of CS Internal Line Break Detection Instrumentation Resulted in Setpoints Being Outside Required TS Limit.Recalibr Affected Instrumentation to Account for Change in Baseline Dp + (04:09:22, 27 June 2025)
- CLI-98-12, NRC Staff Comments on Schedule in Light of Commission Policy Statement on Conduct of Adjudicatory Proceedings (CLI-98-12).* Informs That Only Schedular Changes Necessary as Described in 980707 & 09 Comments.W/Certificate of Svc + (04:10:43, 27 June 2025)
- 05000461/LER-1998-024, :on 980708,failure to Perform Surveillance Testing on Div II Voltage Relays within Specified Frequency of TS Was Noted.Cause of Event Is Under Investigation.Util Expects to Issue Rev to Rept by 980907 + (04:11:05, 27 June 2025)
- 05000302/LER-1986-001, :on 860101,failure of Reactor Coolant Pump a (RCP) Resulted in Reactor Trip and Emergency Feedwater Initiation.Caused by Failure of RCP Shaft.Rcp Shaft Replaced + (04:11:26, 27 June 2025)
- 05000458/LER-1987-028, :on 871106,RHR Pump Tripped.Caused by High Differential Temp Condition Probably Due to Lack of Ventilation.Root Cause Undetermined.Rhr Pump Room Unit Cooler Returned to Svc + (04:14:21, 27 June 2025)
- 05000374/LER-1985-010-02, :on 850215,CRD Hydraulic Control Unit Accumulator Pressure Switch Failures Occurred.Caused by Setpoint Drift.Low Pressure Accumulators Recharged & Accumulator Pressure Switches Recalibr + (04:14:40, 27 June 2025)
- 05000413/LER-1998-012, :on 980706,entered TS 3.0.3 Due to Inoperability of Both Trains of CR Ventilation.Caused by Improper Sys Isolation.Properly Secured Damper in Closed Position & Will Revise Applicable Damper Procedures + (04:15:11, 27 June 2025)
- 05000413/LER-1985-053, :on 850729,diesel Generator 1A Battery Charger Inoperable Due to Blown Fuses.Caused by Design Deficiency, Personnel Error & Procedural Deficiency.Fuses Replaced & Charger Returned to Svc + (04:22:13, 27 June 2025)
- 05000413/LER-1987-039, :on 871102,motor Driven Auxiliary Feedwater Pump 1B Started Automatically Due to Loss of Both Main Feedwater Pumps.Caused by Simultaneous Implementation of Two Nuclear Station Mods.Pump Secured + (04:22:16, 27 June 2025)
- 05000498/LER-1987-013, :on 871102,control Room Ventilation Actuation to Recirculation Mode Due to Inadvertent Switch Operation. Caused by Personnel Error.Const Personnel Reinstructed & Caution Tag Added to Disconnect Switch + (04:26:41, 27 June 2025)
- 05000361/LER-1998-013, :on 980708,control Room post-LOCA Dose Was Noted Outside Design Basis.Caused by Inadequate Original Calculations & Leakage Terms.Ler Will Be Revised When Calculations Complete + (04:26:56, 27 June 2025)
- 05000341/LER-1987-048, :on 871008,channel Check for Reactor Protection Sys Drywell High Pressure Instrumentation Omitted in Surveillance Procedure.Caused by Incomplete Surveillance Procedure.Procedure Revised + (04:27:10, 27 June 2025)
- 05000344/LER-1987-034, :on 871102,redundant Emergency Diesel Generator (EDG) Not Demonstrated Operable within 1 Hr After Removing EDG from Svc.Caused by Personnel Error.Personnel Counseled & EDG B Demonstrated Operable + (04:32:57, 27 June 2025)
- 05000327/LER-1986-015, :on 860407 & 09,failure to Properly Functional Test Reactor Coolant Pump Devices & Electrical Breakers Noted.Caused by Inadequate Test Procedure.Procedure Revised to Ensure Use of Proper Test Techniques + (04:33:03, 27 June 2025)
- 05000416/LER-1998-004, Forwards Corrected Copy of LER 98-004-00 to Include Page 1 of 4.LER Discusses Containment Penetration Being Opened Contrary to Ts,Per Requirements of 10CFR50.73 + (04:46:49, 27 June 2025)
- 05000327/LER-1987-065, :on 871023,ERCW Screen Wash Pumps Omitted from ASME Section XI Test Program Resulting in Potential Degradation of ERCW Flow.Caused by Personnel Error.Test Program Revised to Include Wash Pumps + (04:50:05, 27 June 2025)
- 05000458/LER-1987-023, :on 871019,cooling Water Lines to HX 1RMS*HX11A Serving Radiation Monitor 1RMS*RE11A Found Plugged Due to Corrosion Buildup.Caused by Condition of Svc Water Chemistry.Lines Cleaned or Replaced + (04:50:24, 27 June 2025)
- 05000341/LER-1997-006, :on 970320,response Time Testing Was Not in Conformance W/Ts.Caused by Inadequate Review of Ts.Affected ECCS Actuation Instrumentation Channels Response Time Testing Was Completed on 970326 & 27 + (04:50:49, 27 June 2025)
- TAC:M83600 + (04:51:05, 27 June 2025)
- 05000293/LER-1998-015, :on 980622,identified Potential Low Voltage Condition,Coincident w/loss-of-coolant Accident.Caused by Deficiency in Original Design of Degraded Voltage Protection Sys.Design Basis Reviewed + (04:52:17, 27 June 2025)
- 05000245/LER-1987-042, :on 871027,during Review of Response to IE Bulletin 86-060,determined That No Surveillance Existed That Tested post-accident Sampling Sys.Caused by Misinterpretation of Notice + (04:52:24, 27 June 2025)
- 05000412/LER-1987-033, :on 871028,discovered That Wide Range Gas Monitor Channel C&D Not Performed within Required Monthly Frequency.Caused by Personnel Error.Operating Surveillance Test Schedule Data Base Revised + (04:52:53, 27 June 2025)
- 05000440/LER-1987-073, :on 871029,three MSIVs Failed to Fast Close in Time Required by Tech Specs 3.4.7 & 3.6.4.On 871103,two MSIVs Failed to Close.Caused by Sticking of Fast Closure Dual Solenoid Air Pilot Valves.Elastomer Discs Replaced + (04:52:58, 27 June 2025)
- 05000458/LER-1998-003-02, :on 980624,adequacy of Division 1 & 2 DG Control Air Sys Was Noted.Root Cause Analysis Is Being performed.Multi-disciplinary Team Was Formed to Address Immediate & long-term Corrective Actions + (04:53:47, 27 June 2025)
- 05000413/LER-1998-010, :on 980624,pinhole Leak in AFW Nozzle Tempering Line Caused Noncompliance W/Ts Structural Integrity Requirements.Caused by Previous Accelerated Flow Rates & Improper Socket Weld Fit Up.Isolated Piping Containing Hole + (04:55:30, 27 June 2025)
- 05000382/LER-1996-015, :on 961101,noted That Containment Penetration 20 Was Not Totally Isolated During Maint on Valve CC-808A. Caused by Personnel Error.Issued Ltr W3B1-96-0083 Re TS 3.6.3 to All Licensed Personnel & Revised CCW Drawings + (04:56:01, 27 June 2025)
- 05000298/LER-1997-010, :on 970713,standby Gas Treatment Inoperability Was Noted.Caused by Design Deficiency.Surveillance Procedure 6.SUMP.101 Will Be Performed on Periodic Basis + (04:56:56, 27 June 2025)