Pages that link to "05000220/LER-2020-001, Control Room Air Treatment System Inoperable"
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The following pages link to 05000220/LER-2020-001, Control Room Air Treatment System Inoperable:
Displayed 13 items.
- 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition (← links)
- 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor (← links)
- 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat (← links)
- 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability (← links)
- 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded (← links)
- 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown (← links)
- 10 CFR 50.73(a)(2)(ix)(A), Prevented Safety Function in Multiple System (← links)
- 05000220/LER-2020-001-01, Control Room Air Treatment System Inoperable (← links)
- 05000410/LER-2020-002-01, Failure to Meet Technical Specification MSIV Stroke Times (← links)
- ML20192A074 (redirect page) (← links)
- 05000220/LER-2020-001 (redirect page) (← links)
- 05000220/LER-2001-002 (← links)
- 05000220/LER-2001-001 (← links)
- 05000220/LER-1982-012, Forwards LER 82-012/04L-0 (← links)
- 05000220/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000220/LER-1981-019, Forwards LER 81-019/03L-0 (← links)
- 05000220/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000220/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000220/LER-1983-001, Forwards LER 83-001/04L-0 (← links)
- 05000220/LER-1983-002, Forwards LER 83-002/04L-0 (← links)
- 05000220/LER-1983-044, Special Rept of Actions Taken to Assess Current Status of Fire Barrier Penetrations & to Assure Future Integrity of Barriers Following Improper Sealing of One Penetration Reported in LER 83-44 (← links)
- 05000220/LER-1983-020, Forwards Updated LER 83-020/03X-1 (← links)
- 05000220/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000220/LER-1983-003, Forwards LER 83-003/04L-0 (← links)
- 05000220/LER-1983-005, Forwards LER 83-005/01T-0 (← links)
- 05000220/LER-1983-025, Corrected LER 83-025/04L-0:while Reviewing Environ Radiation Fish Analysis Sample Data,Determined That Lower Limit of Detection Sensitivity Not Met for Several Radionuclides During Analysis of May Fish Samples (← links)
- 05000220/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000220/LER-1985-008, Corrected LER 85-008-00:on 850610,review by Operations Dept Discovered That Temporary Jumper/Block Log 2036 Not Reviewed by General Superintendent within 14-day Time Limit,Per Tech Spec 6.8.3.C (← links)
- 05000220/LER-1982-009, Forwards Updated LER 82-009/01X-1 (← links)
- IR 05000220/2020003 (← links)
- 05000220/LER-1998-014, Forwards LER 98-014-00 Re CR Staffing in Violation of TS Due to Unqualified SRO Assuming SRO Shift Duties (← links)
- 05000220/LER-1998-013, Forwards LER 98-013-00 Re Valve Repositioning Caused by non-conformance W/App R Safe Shutdown Analysis (← links)
- 05000220/LER-1997-015, Informs NRC That Util Is Retracting LER 97-015, Potential Bypass Leakage Path Between Drywell & Torus During Vent & Purge, Which Had Been Reported IAW 10CFR50.73(a)(2)(v)(D). Leakage Path Would Not Have Prevented Plant Function (← links)
- 05000220/LER-1997-012, Clarifies CA 3 of LER 97-12, Addl 10CFR50 App R Section Iii.J Lighting Deficiencies (← links)
- 05000220/LER-1988-009, FOIA Request for LER 88-09,NRC Enforcement Conference W/Util on 880711,Insp Rept 50-220/88-15 & NRC Notice of Violation Ltr to Util (← links)
- 05000220/LER-1998-003, Forwards LER 98-003-00 Re Power/Flow Relationship TS Violation.Rept Fulfills Requirement of TS 3.1.7.g for 30-day Written Rept If Power/Flow Relationship of COLR Is Exceeded (← links)
- 05000220/LER-2023-002, Average Power Range Monitors Declared Inoperable Due to Trip of Reactor Recirculation Pump 12 (← links)
- 05000220/LER-2023-001-01, Supplement to NMP1 Indication on the N2E Dissimilar Metal Weld Exceeding ASME Acceptance Criteria (← links)
- 05000220/LER-2023-001, Indication on the N2E Dissimilar Metal Weld Exceeding ASME Acceptance Criteria (← links)
- 05000220/LER-2021-002, Isolation of Both Emergency Condensers Due to Loss of UPS 162A (← links)
- 05000220/LER-2020-001-01, Control Room Air Treatment System Inoperable (← links)
- 05000220/LER-1998-012-01, :on 980521,determined That Fire Dampers Installed in Supply & Return Ducts to Auxiliary CR Would Fail Closed as Result of Loop.Caused by Inadequate Evaluation.Modified Affected Fire Dampers (← links)
- 05000220/LER-1998-010-01, :on 980430,inadequate Reactor Vessel Level Instruments Were Noted.Caused by Inaccurate Input Parameter. Revised Calculations & Associated Instruments Were Recalibrated (← links)
- 05000220/LER-1998-011-01, :on 980503,inadvertent Actuation of RPS Circuitry Occurred Due to Personnel Error.Fuse Was Replaced & SDC Was Placed Into Svc (← links)
- 05000220/LER-1998-007-02, :on 980424,SRO Was Not in CR for Two Minutes. Caused by Insufficient Awareness of Assistant Station SS Role & Actions on Nuclear Safety.Counseled Assistant Station SS & Relieved Supervisor of Licensed Duties (← links)
- 05000220/LER-1998-009-01, :on 980428,missing Fire Proofing Matl from Structural Steel,Was Discovered.Caused by Construction Drawing Not Followed by Contractor.Breach Permit & Compensatory Fire Patrols Initiated (← links)
- 05000220/LER-1998-008-01, :on 980428,RWM TS SR Were Not Met for Previous Shutdowns.Caused by Failure to Develop Procedures Which Tested Rwm.Revised RWM Sp & Verified Adequacy of Operations Sps Which Are Performed on Conditional Basis (← links)
- 05000220/LER-1998-006-01, :on 980421,design Deficiency Associated W/Crevs RMs Was Noted.Caused by Engineering Personnel Not Performing Adequate Evaluations.Modified Sys Logic to Initiate CREVS Directly from MSLB & LOCA Signals (← links)
- 05000220/LER-1998-004-01, :on 980411,identified That Containment Spray Flow Control Valve 80-118 Had Been Left Open Since 980407. Caused by Failure by Chief Shift Operator to Properly Follow Procedure.Procedures Revised (← links)
- 05000220/LER-1998-014-01, :on 980617,control Room Staffing Was in Violation of TS Due to Unqualified SRO Assuming SRO Shift Duties.Caused by Inadequate Managerial Methods.Crew Remediated & Lessons Learned Memo Distributed (← links)
- 05000220/LER-1998-013-01, :on 980604,valve Repositioning Caused non- Conformance W/App R Safe Shutdown Analysis. Caused by Failure to Include Valves 40-26 & 40-27 in UFSAR Description of App R.Circuit Breakers 40-30 & 40-31 Opened (← links)
- 05000220/LER-1998-002-01, :on 980220,failure of CR Emergency Ventilation to Meet Differential Pressure Requirements Occurred.Caused by Inadequate Change Management.Engineering Supporting Analysis Was Completed to Justify Operations (← links)
- 05000220/LER-1998-001-01, :on 980129,violation of Secondary Containment Was Noted.Caused by Knowledge Deficiency of Personnel Assessing Plant Impact of Maint Work.Plant Impact Statements in Maint Procedure Have Changed (← links)
- 05000220/LER-1998-003-01, :on 980304,plant Exceeded 100% Rated Core Thermal Power & Exceeded Power/Flow Relationship of TS 3.1.7.d.Caused by Inadequate Managerial Methods.Implemented Conservative Interim Guidance to Ensure Correct Power Level (← links)
- 05000220/LER-1986-030, :on 860916,reactor Bldg Ventilation Radiation Monitor 11 Tripped on Loss of Power,Resulting in Loss of Reactor Protection Sys Bus.Work Request Generated (← links)
- 05000220/LER-1986-028, :on 860910,discovered That Supply Valves to Sampling Points Utilized for Obtaining 12-h Grab Samples of Svc Water Discharge Closed.Cause Not Stated.Valves Reopened So That Representative Sample Could Be Taken (← links)
- 05000220/LER-1986-027, :on 860909,discovered That Temporary Change Notice Initiated on 860823 for Relay Block Not Reviewed & Approved within Specified Time.Caused by Misfiling of Change Notice.Relay Block Removed & Notice Rerouted (← links)
- 05000220/LER-1986-019, :on 860618,control Rods Moved While Rod Worth Minimizer Inoperable.Caused by Software Problem in Minimizer Program.Plant Shut Down.Indexing Problem in Computer Software Corrected (← links)
- 05000220/LER-1986-031, :on 861014,reactor Bldg Emergency Ventilation & one-half Scram Initiated.Caused by Faulty Potentiometers in Voltage Regulator of MG Set 172.Voltage Regulator replaced.One-half Scram Reset (← links)
- 05000220/LER-1986-032, :on 861016,reactor Bldg Emergency Ventilation Sys (Evs) Actuated.Caused by Inadvertent Unseating of Relay from Socket in Circuit.Reactor Bldg Evs Manually Reset.W/ (← links)
- 05000220/LER-1987-002-01, :on 870126,NRC Notified of Problem W/Improper Seating of Agastat GP Series Relays That Could Cause Substantial Safety Hazard.Caused by Improper Installation of Relays.Relays Reseated Per GE Instructions (← links)
- 05000220/LER-1986-033, :on 861121,reactor Bldg Closed Loop Cooling HX Failed Inservice Insp Hydrostatic Test Due to Crack in Weld. Caused by Improper Welding of silicon-bronze to Carbon Steel Weld.Hx Isolated & Under Repair (← links)
- 05000220/LER-1986-002, :on 860201,radioactive Gaseous Effluent Monitoring Sys Stack Gas Sample Pump 1 Tripped.Caused by Failed Board in Microprocessing Unit.Board Replaced (← links)
- 05000220/LER-1986-020, :on 860618,during Startup from Refueling Outage,Pinhole Leak Discovered in newly-installed 3/4-inch Sample Line Outside Primary Containment.Caused by Flaw in Pipe.Line Disconnected,Capped & Tested (← links)
- 05000220/LER-1986-021, :on 860619,reactor Scram & HPCI Initiation Occurred.Caused by Fuse Pulled During Replacement of Relay for intermediate-range Monitor.Scram & HPCI Initiation Signals Reset (← links)
- 05000220/LER-1986-017, :on 860615,reactor Scram Occurred.Caused by Reactor Low Water Level Setpoint Being Reached During Operator Surveillance Test for Automatic Startup of HPCI Mode of Feedwater Sys (← links)
- 05000220/LER-1986-018, :on 860618,reactor Scram Occurred Due to Inventory Requirements Exceeding Capability of Condensate & Feedwater Booster Pumps.Caused by Operator Error.Event Reviewed W/Operating Personnel (← links)
- 05000220/LER-1986-015, :on 860530,reactor Scram Occurred,Initiating Reactor Bldg Emergency Ventilation.Caused by Lifted Neutral Leg of Output Protective Relaying Circuit.Lifted Lead Replaced & Reactor Scram Reset (← links)
- 05000220/LER-1999-005-01, :on 990801,RT During Plant Startup on IRM Spiking Was Noted.Caused by electro-magnetic Interference. Inspected,Cleaned,Burnished & Tested IRM 11 Range Switch. with (← links)
- 05000220/LER-1986-013, :on 860518,reactor Bldg Emergency Ventilation Sys Initiated Due to Blown Fuse.Caused by Damaged Timer Relay.Timer Repaired,Fuse Replaced & Sys Returned to Svc.W/ (← links)
- 05000220/LER-1999-004-01, :on 990723,reactor Scram Was Noted.Caused by Mechanical Pressure Regulator Suppressor Valve Failure. Cleaned Pressure Suppressor Valve & Provided Guidance for Valve Disassembly & Insp.With (← links)
- 05000220/LER-1986-010, :on 860505,reactor Bldg Emergency Ventilation Sys Initiation & Isolation of Normal Reactor Bldg Ventilation Occurred.Caused by Blown Fuse in Control Circuit in Reactor Protection Sys Bus 11 (← links)
- 05000220/LER-1986-006, :on 860409,discovered That One of four-inch Sample Lines to Header Completely Plugged.Caused by Pebbles Washed Off Reactor Bldg Into Roof Drains.Roof Drain Screens Will Be Installed (← links)
- 05000220/LER-1986-026, :on 860822,discovered Tech Spec Violation Re Adjustment of Stem Packing on Scram Inlet & Outlet Valves on 860821,w/o Placing Unit in Hot Shutdown.Caused by Personnel Error.Plant Shut Down & Rods Scram Time Tested (← links)
- 05000220/LER-1987-001, :on 870109,APRM Flow Biased Scram & Rod Block Calibr Curves Did Not Have Knee Breaks at 100% Recirculation Flow.Caused by Incomplete Documentation & Lack of Mod Control.Circuitry Recalibr (← links)
- 05000220/LER-1986-025, :on 860806,neither Fire Watch Patrol Nor Continuous Fire Watch Established for Nonfunctional Door 52 & Inoperable Fire Detection Equipment in Turbine Bldg. Fire Watch Established & Fire Door Repaired (← links)
- 05000220/LER-1987-004, :on 870210,discovered That Instrument Control Surveillance Test Not Performed on 870116,per Tech Specs. Caused by Failure to Complete Rev to Test Procedure Prior to Scheduled Test.Procedures Revised (← links)
- 05000220/LER-1986-036, :on 861211,Door D-137 Did Not Restrict Access to Area W/Greater than 1,000 Mrem/H.Caused by Cognitive Error by Radiation Protection Supervisor.Xr Key Core in Door D-137 Switched W/H Key Core in Gate G-11 (← links)
- 05000220/LER-1986-035, :on 861210,secondary Containment Temporarily Breached When Security Guard Opened Air Lock Door.Caused by Personnel Error.Clarification of Rules for Responding to Alarms at Air Lock Doors Issued (← links)
- 05000220/LER-1986-034, :on 861206,loss of Stack Gas Monitoring Experienced When Radioactive Gaseous Effluent Monitoring Sys Shut Down Sys Sample Supply Pump.Possibly Caused by Problem in Stack Monitoring Sys Software (← links)
- 05000220/LER-1999-001, :on 990125,noted That Plant Operated Outside Design Basis Due to Failure to Revise Satellite pre-fire Plans.Satellite Copies of pre-fire Plans Were Revised & Procedure Re pre-fire Plans Was Revised.With (← links)
- 05000220/LER-1986-023, :on 860801,discovered Failure to Perform Radiation Protection & Fire Dept Surveillance Tests During 850319-1216.Caused by Personnel Error.Personnel Advised of Tech Spec Requirements & Staff Increased (← links)
- 05000220/LER-1986-024, :on 860803,turbine Trip & Subsequent Scram Occurred.Caused by Increase in Reactor Water Level.Hpci Mode of Feedwater Reset,Reactor Water Level Restored & Instrument & Control Personnel Notified to Remove Signal (← links)
- 05000220/LER-1999-003-01, :on 990320,noted That Plant Operated with Average Planear LHGR Exceeding TS Limits.Caused by Inadequate Interface Design Between Color Graphics Terminal & 3-D Monicore Sys.Lowered Reactor Power.With (← links)
- 05000220/LER-1986-011, :on 860508,contractor Received Contaminated Injury to Hand from Cut Section of Piping.Caused by Personnel Error.Medical Attention Administered & Radiation Exposure Survey Conducted (← links)
- 05000220/LER-1986-007, :on 860415,during Refueling Outage Acurex Fuel Zone Level Indication Instrumentation Found Inaccurate by 15 to 20 Inches in Nonconservative Direction.Ge to Correct Software & Acurex Instrumentation Recalibr (← links)
- 05000220/LER-1999-002, :on 990217,noted That ASME Code Preservice Exams Had Not Been Performed on Emergency Condensers.Caused by Misinterpretation of ASME Code Requirements.Required Preservice Exams Were Completed on 990218.With (← links)
- 05000220/LER-1986-029, :on 860910,instrument & Control Dept Surveillance Test Not Performed within Required Interval. Caused by Unintentional Deletion of Test from Schedule. Personnel Advised & Schedule Updated (← links)
- 05000220/LER-1986-005, :on 860402,during Shutdown for Refueling,Full Scram Experienced.Caused by Loss of Power to Reactor Protection Sys Bus II Due to Deenergization of Brown Boveri ITE-27 Relay.Relay Repaired or Replaced (← links)
- 05000220/LER-1986-016, :on 860523,Channel 11 High Reactor Water Level Feedwater Pump Trip Found Inoperable Until Feedwater Flow Control Valve 11 Opened Approx 50%.Jumpers Installed to Bypass Flow Control Valve Position Contacts (← links)
- 05000220/LER-1986-003, :on 860308,attempt to Reset HPCI Following Manual Trip of Turbine Failed Because Contacts for Emergency Governor Limit Switch Did Not Change State.Caused by Stuck Plunger Assembly.Work Request Initiated (← links)
- 05000220/LER-1986-004, :on 860308,w/unit Shut Down for Refueling,High Reactor Water Level Signal Resulted in Turbine Trip Signal, Causing Feedwater Control Sys Transfer to HPCI Mode. Procedural/Hardware Changes Being Considered (← links)
- 05000220/LER-1986-014, :on 860603,reactor Scram Occurred During Surveillance Test.Caused by Instantaneous Inlet of Water in Transmitter RE-16B.Surveillance Test Will Be Revised & Technicians Cautioned (← links)
- 05000220/LER-1986-012, :on 860516,both Fire Pumps Taken Out of Svc to Allow Diver to Work in Station Svc Water Intake Tunnel. Telephone Notification to Region I Not Made Until 860517. Personnel Counseled (← links)
- 05000220/LER-1998-019-01, :on 981110,ASME Section XI ISI Was Missed. Caused by Cognitive Error Involving Technical Inaccuracies. Util Will Revise Second 10-yr Interval ISI Program Plan to Incorporate Visual Exam Requirements.With (← links)
- 05000220/LER-2020-001, Control Room Air Treatment System Inoperable (← links)
- 05000220/LER-1986-008, :on 860422,reactor Bldg Emergency Ventilation Sys Initiated Due to Undervoltage Condition on Instrument & Control Bus 30.Caused by Loss of Backfeed from Plant Switchyard.Investigation Continuing (← links)
- 05000220/LER-1998-018-01, :on 981006,determined That Actual Total Crds Flow Exceeded Indicated Crds Total Flow.Caused by Degraded Crds Filter Bypass Valve.Plant Has Been Limited to 1847 Mwt & Shift Check Procedure Was Revised.With (← links)
- 05000220/LER-1998-017-01, :on 980902,breach of Primary Containment Was Noted.Caused by Personnel Error in 1994.Immediately Upon Discovery,Asss Directed That CS Heat Exchanger Vent Valves Be Closed.With (← links)
- 05000220/LER-1998-016-01, :on 980820,determined That CS Pump Motor Bearing Cooling Flow Outside Design Basis Requirement.Caused by Error in Maint Reassembly That Crimped Cooling Coil.Cs Pump 122 Repaired.With (← links)
- 05000220/LER-1998-015-01, :on 980804,breach of Primary Containment Was Noted.Caused by Personnel Error.Closed Heat Exchanger Vent Valves & Restored Torus Pressure.With (← links)
- 05000220/LER-1986-001, :on 860118,original Calculations for Jet Impingement Loading on ECCS Isolation Valves Found in Noncompliance W/Fsar.Caused by Break Inside Guard Pipe. Isolation Valves Will Be Replaced (← links)
- 05000220/LER-1985-018, :on 851010,low Air Pressure Start Test of Tech Spec Section 4.6.7.b.4 Failed.Caused by Need to Energize or Manually Bypass Solenoids on Governor Sys.Mods to Governor Sys & Sys Manual Start Performed (← links)
- 05000220/LER-1985-023, :on 851108,during Preparations for Main Turbine Startup,High Temp in Main Turbine Exhaust Hood Caused Turbine Trip & Actuation of HPCI Mode of Feedwater Flow (← links)
- 05000220/LER-1985-022, :on 851107,turbine Bypass Valve 12-H Inadvertently Closed,Causing Decrease in Reactor Water Level & Subsequent Scram & Initiation of HPCI Mode of Feedwater. Valve to Be Inspected (← links)
- 05000220/LER-1985-012, :on 850916,reactor Cleanup Sys Isolated Due to High Area Temp.Caused by Steam Leaking from Gland Packing on 1-inch Vent Valve from Cleanup Nonregenerative Hx.Leak Repaired (← links)
- 05000220/LER-1985-020, :on 851030,momentary Loss of Output Power from Uninterruptible Power Supply Motor Generator Set 162 Experienced.Caused by Generator Undervoltage Relay Sensing Spurious Undervoltage (← links)
- 05000220/LER-1985-021, :on 851101,during Normal Operation,Feedwater Flow Control Valve 12 Malfunctioned Causing 95-inch Reactor Water Level Condition.Caused by Problem W/Instrument Air Sys (← links)
- 05000220/LER-1985-010, :on 850815,accidental Initiation of Reactor Bldg Emergency Ventilation Sys Occurred.Caused by Electrical Spike Experienced by Channel 12 Reactor Bldg Ventilation Duct Monitor.Ventilation Sys Reset (← links)
- 05000220/LER-1984-019, :on 850722,24 Occurrence Repts Initiated in Early 1984 Discovered Unsent.Caused by Personnel Deviating from Established Program.Methods Used to Initiate,Review, Track & Close Out Occurrence Repts Reviewed (← links)
- 05000220/LER-1985-025, :on 851215,reactor Power Reduction Initiated Due to Inability to Monitor Specified Core Thermal Parameters.Caused by Plant Process Computer Failure. Reactor Power Restored (← links)
- 05000220/LER-1985-024, :on 851212,turbine Trip & Subsequent HPCI Mode of Feedwater Initiation Occurred.Caused by Difference Between Level Indications Due to Different Indicator Mfg. Water Level Lowered & HPCI Reset (← links)
- 05000220/LER-1985-019, :on 851015,discovered Emergency Isolation Dc Motor Operated Valves 39-07 & 39-08 Might Not Close within 38 During Accident.Possibly Caused by Incorrectly Sized Electric Supply Cables.Cables Replaced (← links)
- 05000220/LER-1985-014, :on 850819,during Surveillance Insp,Maint Electrician Inadvertently Grounded Main Generator Excitation Sys Amplidyne Motor Generator Set,Causing Main Generator & Turbine Trips & Reactor Scram (← links)
- 05000220/LER-1985-008-01, :on 850610,discovered That Temporary Jumper Block Log 2036 Not Reviewed by General Superintendent within 14-day Time Limit.Cause Unstated.Review Completed.New Procedure to Ensure Timely Reviews Implemented (← links)
- 05000220/LER-1984-004, :on 840507,cracks Discovered at One Location of Core Spray Loop 11.Caused by Chloride Contamination on Pipe Surface.Crack Weld Repaired & Tested (← links)
- 05000220/LER-1985-016, :on 850927,three Normally Open Dampers Failed to Isolate on Halon Suppression Signal.Caused by Interruption to Initiation Circuit Due to Wiring Change on 850918.Wiring Corrected (← links)
- 05000220/LER-1985-015, :on 850911,personnel Informed of Three Instances of Cable Routing Discrepancies.Operators Informed. Mods Designed & Will Be Installed in Timely Manner (← links)
- 05000220/LER-1985-011, :on 850610,review Revealed That Radiological Habitability of Technical Support Ctr (TSC) Not Consistent w/NUREG-0737,Suppl 1.Cause Unstated.Tsc Being Relocated to Better Location Re Radiation Shielding (← links)
- 05000220/LER-1985-013, :on 850621 & 25,automatic Actuation of Control Room Emergency Ventilation Sys Occurred.Caused by Spurious Upscale Deflection of Control Room Vent Monitor Due to Line Noise.Involved Monitors Recalibr (← links)
- 05000220/LER-1985-017, :on 850823,reactor Scram Initiated Due to Reactor Low Water Level.Caused by Detached Range Spring & Lock Screw in Valve Positioner Closing Valve on Feedwater Pump 11.Lock Screw & Addl Hardware Replaced (← links)
- 05000220/LER-1985-007, :on 850424,automatic Initiation of Reactor Bldg Emergency Ventilation Sys Occurred.Caused by Technician Shorting Wire in Cable Connector to Sensor for Emergency Condensor Ventilation Monitor 121 (← links)
- 05000220/LER-1985-006, :on 850419,automatic Initiation of Reactor Bldg Emergency Ventilation Sys Occurred.Caused by off-normal Spiking of Reactor Bldg Ventilation Duct Monitor 11.Sys Checked & Source Calibr.Sys Returned to Svc (← links)
- 05000220/LER-1985-005, :on 850416,reactor Scram Occurred Due to APRM High Flux Level.Caused by Partial Closing of Turbine Control Valves Due to Disturbance in Turbine Control Sys.Work Requests Issued to Troubleshoot Sys (← links)
- 05000220/LER-1985-009, :on 850522 & 31,discovered Instrument Channel Tests Not Performed on Three of Four Emergency Condenser Sys Noble Gas Activity & Suppression Chamber Water Level Monitors.Cause Unknown.Tests Performed (← links)
- 05000220/LER-1984-012, :on 840601,diesel Generator Started When Backfeeding Powerboard 102 from Powerboard 16.Caused by Protective Relays Sensing Undervoltage.Normal 115 Kv Supply Returned on Powerboard 102 (← links)
- 05000220/LER-1984-016, :on 841001,momentary Grid Disturbance Occurred Producing Dip in 115 V Transmission Line Causing Frequency Relays to Trip.Caused by Oswego Steam Station Attempting to Put Syncronous Condenser in Svc (← links)
- 05000220/LER-1985-001, :on 850123,24 & 0207,automatic Initiations of Reactor Bldg Emergency Ventilation Sys Occurred.Caused by off-normal Spiking of Ventilation Duct Radiation Monitor 11.Sensor Converter Replaced (← links)
- 05000220/LER-1984-017, :on 841112,during Reactor Shutdown,W/All Rods Inserted for Electro Hydraulic Control Sys Turbine Repairs, Reactor Protection Sys Actuated,Initiating Scram.Caused by Procedure Error (← links)
- 05000220/LER-1984-018, :on 841113,during Startup,Mechanical Pressure Regulator Sent Erroneous Signal to Bypass Valve Relay. Reactor Scram Initiated by Low Water Level.Mechanical Pressure Regulator Cleaned & Lubricated (← links)
- 05000220/LER-1985-004, :on 850304,during Shutdown,Turbine Trip Signal Led to HPCI Initiation.Caused by High Reactor Water Level.Level Control Adjusted.Water Level Returned to Normal (← links)
- 05000220/LER-1985-003, On 850304,reactor Scram Initiated.Caused by Technicians Trying to Rectify Error Condition in Transmitter During Monthly Surveillance.Procedure Revised to Caution Technicians on Effects of Errors (← links)
- 05000220/LER-1985-002, :on 850214,auxiliary Control Room Fire Suppression Sys Inoperable.Caused by Inoperable Fire Dampers.Fire Dampers Repaired & Tested.Personnel Instructed in Tech Spec Requirements (← links)
- 05000220/LER-1984-015, :on 840807,protective Relaying Actuated Causing Loss of Power to Power Boards 103 & 17B.Caused by Personnel Error.Operator Reestablished Offsite Power to Powerboards.Procedural Changes Implemented (← links)
- 05000220/LER-1984-009, :on 840713,loss of Plant Process Computer Caused Each Acurex Channel to Become Inoperable.Channels Disconnected from Computer & Manually Restored to Operable Status.Software Changed to Avoid Future Error (← links)
- 05000220/LER-1984-014, :on 840617,during Startup & re-testing of Main Steam Line solenoid-actuated Relief Valves,One Valve Stuck Open & Three Indicated Seat Leakage.Reactor Shut Down & Maint Performed.All Valves Operable on 840622 (← links)
- 05000220/LER-1984-013, :on 840614,during Testing,Three Main Steam Line Solenoid Actuated Relief Valves Failed.Two Valves Stuck Open.Caused by Seat Leakage.Maint Performed.On 840617,three Valves Leaked Again (← links)
- 05000220/LER-1984-011, :on 840603,scram Occurred When Reactor Mode Switch Changed to Shutdown.Caused by Improper Connection on Reactor Protection Sys (RPS) Channel 11.RPS Channel Removed & Checked (← links)
- 05000220/LER-1981-055-03, /03L-0:on 810605,visual Insp of Doors & Access Openings for Adequacy of Sealing Documented,But No Record Made of Test Using DOP & Freon.Caused by Vagueness in Procedure NI-RTP-38.Procedure Revised (← links)
- 05000220/LER-1982-024-03, /03L-0:on 840521,discovered That Documentation of Reactor Bldg Emergency Ventilation Sys Surveillance Test on 821019 Indicated Visual Insp Only of Doors & Access Openings for Sealing Adequacy (← links)
- 05000220/LER-1984-007, :on 840521,during Refueling Outage,After Control Rod Scram Time Testing Performed,Two High Pressure Reactor Scrams Occurred.Cause Not Stated.Procedural Changes Incorporated (← links)
- 05000220/LER-1984-008, :on 840524,blocking Valve Not Closed Prior to Starting Containment Spray Air Flow Cyclic Surveillance Test,Resulting in Low Instrument Air Pressure & Reactor Scram.Caused by Personnel Error (← links)
- 05000220/LER-1984-005, :on 840509,during Refueling Outage,Spurious Trip of Intermediate Range Monitors Occurred on Monitors 11 & 16.Caused by Electromagnetic Interference Due to Welding in Drywell.No Corrective Action Taken (← links)
- 05000220/LER-1984-003, :on 840412,06-08,26 & 29,during Refueling outage,12 of 16 Reactor Head Safety Valves Failed to Exhibit Set Pressure within 1% of Tech Spec Set Pressure.Caused by Normal Wear & Tear on Valves During Svc Lives (← links)
- 05000220/LER-1984-006, :on 840413,during Refueling Outage,Ak Breaker Feeding Power Tripped Open Due to Dirty Contacts,Causing Loss of Power to Powerboard & Other Sys.Full Scram Signal Resulted.Breaker Contacts Cleaned (← links)
- 05000220/LER-1984-010, :on 840608,reactor Protection Sys Channel 4 Power Supply Bus Experienced Momentary Power Loss Causing Condenser vacuum-MSIV Closure Scram Bypass Relays to Deenergize (← links)
- 05000220/LER-1975-001, :on 750109,level Control Valve to Emergency Condensers Failed,Resulting in High Water Level Alarm.Caused by Inability to Close Valve.Level Maintained W/Manual Valve. Spare Controller Installed (← links)
- 05000220/LER-1975-004, :on 750212,during Plant Startup,Feedwater Pump 12 Failed to Start.Caused by Broken Linkage on Suction Pressure Switch Due to Vibration.Switch Linkage Replaced (← links)
- 05000220/LER-1975-003, :on 750212,during Plant Startup,Waste Evaporator Concentrator Failed,Resulting in Leakage.Caused by Sulfuric Acid Contamination (← links)
- 05000220/LER-1975-005, :on 750401,during Testing of Emergency Ventilation Sys,Reactor Protection Sys Solenoid Valve SN-831630 Failed to Open.Caused by Broken Stem & Metal Oxide Buildup.Valves Repaired (← links)
- 05000220/LER-1975-006, :on 750405,during Surveillance testing,RE-18A Reactor Level lo-lo-lo Found Actuating at 131 Rather than 128.5 Inches of Water.Caused by Instrument Drift.Instrument Recalibr (← links)
- 05000220/LER-1975-007, :on 750412,during Quarterly Testing,Ec IV 11 (AC) Failed to Open.Caused by Loose Connection in Remote Manual Wiring Terminal Block.Connection Tightened (← links)
- 05000220/LER-1975-008, :on 750414,during Normal Operation,Relay Coil in Reactor Protection Sys Relay 12K30 Shorted.Caused by Environ & High Usage.Coil Replaced (← links)
- 05000220/LER-1975-009, :on 750414,during Function Test,Average Power Range Monitor 11 Failed to Provide High Alarm.Caused by Open Transistor in Dual Alarm Unit.Transistor Replaced (← links)
- 05000220/LER-1975-016, :on 750628,during Routine Surveillance Testing, Three Reactor Water lo-lo-lo Level Sensors Found Out of Calibr.Caused by Minor Setpoint Drift.Instruments Recalibr (← links)
- 05000220/LER-1975-014, :on 750618,during Monthly Testing,Standby Liquid Control Sys Pump 11 Would Not Start.Caused by Unlatched Power Breaker Trigger.Breaker Reset (← links)
- 05000220/LER-1975-018, :on 750704,during Routine Operation,Emergency Condenser Vent Radiation Monitor Went Upscale Isolating Sys as Designed.Caused by Failure of Monitor Component Due to High Temp Environ.Monitor Replaced (← links)
- 05000220/LER-1975-019, :on 750722,surveillance Test on Torus Vacuum Relief to Atmosphere Switches Not Completed.Caused by Failure to Note Recent Changes to Tech Specs.Revised Tech Specs Noted (← links)
- 05000220/LER-1975-020, :on 750725,environ Milk Sample Found Not Analyzed for 9 Days Following Collection.Caused by Samples Being Sent to Lab Via Ground Transportation.Samples Will Be Sent by Air to Eberline Corp Labs (← links)
- 05000220/LER-1975-023, :on 750826,iodine Detection Sensitivity Milk Sample Found Inadequate.Caused by Failure of Contractor to Fulfill Procedural Requirements.Contractor Reinstructed (← links)
- 05000220/LER-1975-022, :on 750814,during Routine Operations,Reactor Bldg Vent Monitor Spiked Resulting in Operation of Emergency Vent Sys.Caused by Failed Solenoid & Broken Spring Plunger Nylon Tip.Tip Replaced (← links)
- 05000220/LER-1975-021, :on 750802,during Routine Surveillance Test RV-30A,core Spray Sparger Tripped at 6.4 Psid Instead of Required 5 Psid.Caused by Setpoint Drift.Redundant Component Operable.Sparger Recalibr (← links)
- 05000220/LER-1975-028, :on 750922,main Steam Line Temp Switch Found to Actuate Low.Caused by Setpoint Drift (← links)
- 05000220/LER-1975-027, :on 750916,radiation Monitor Power Supply Failed. Caused by Bad Component.Power Supply Replaced (← links)
- 05000220/LER-1975-026, :on 750913,leak Discovered on Reactor Recirculation Pump Motor Cooling Line 15.Caused by Insulated Bushing in Pump Oil Cooling Sys.Part Replaced (← links)
- 05000220/LER-1975-025, :on 750913,feedwater Pump 12 Would Not Start Upon Signal.Caused by Loose 120-volt Control Fuseholder Due to Vibration (← links)
- 05000220/LER-1975-024, :on 750911,average Power Range Monitor 14 Went Downscale.Caused by Loose Component in Power Supply.Problem Corrected (← links)
- 05000220/LER-1975-030, :on 751001,main Steam Line Temp Switch Found to Actuate High.Caused by Setpoint Drift.Instrument Recalibr (← links)
- 05000220/LER-1975-029, :on 751001,main Steam Temp Switch Found to Actuate High.Caused by Setpoint Drift.Instrument Recalibr (← links)
- 05000220/LER-1975-036, :on 751129,water Leak Discovered in Piping Insulation Leading to Regenerative Hx.Cause Undetermined. Defective Piping Replaced (← links)
- 05000220/LER-1975-035, :on 751129,chlorides Increased from 80 Ppb to 160 Ppb.Caused by Condenser Tube Leak.Tube Plugged (← links)
- 05000220/LER-1975-034, :on 751122,torus Vacuum Relief Valve 68-12A Found Operating Low.Caused by Setpoint Drift.Instrument Recalibr (← links)
- 05000220/LER-1975-033, :on 751121,source Range Monitor 13 Failed to Provide Adequate Signal to Monitor.Caused by Failed Capacitor in Preamplifier Unit (← links)
- 05000220/LER-1975-038, :on 751212,RE-04C Tripped Low.Caused by Drift (← links)
- 05000220/LER-1975-037, :on 751203,intermediate Range Monitor 11 Failed to Respond During Startup.Caused by Low Resistance (← links)
- 05000220/LER-1976-001, :on 760117,RV-30 a & B Core Spray Delta P Instrumentation Indicated Out of Normal Range.Caused by Setpoint Drift in Conservative Direction (← links)
- 05000220/LER-1976-017-01, :on 760428,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration (← links)
- 05000220/LER-1976-006, :on 760215,loss of HPCI Component Occurred Due to Apparent Failure of Pump Suction Pressure Switch.Caused by Disconnected Linkage Arm on Mercoid.Arm Reconnected (← links)
- 05000220/LER-1976-005, :on 760210,refuel Platform High Range Monitor Calibr Indicated Response of 350 M/R Rather than 800 M/R. Caused by Failed Detector.Detector Replaced (← links)
- 05000220/LER-1976-004, :on 760207,reactor lo-lo-lo Level Indicator Actuated High.Caused by Setpoint Drift (← links)
- 05000220/LER-1976-003, :on 760207,high Drywell Pressure Indicator Tripped Low.Caused by Setpoint Drift (← links)
- 05000220/LER-1976-002, :on 760204,MAPHLGR Kw/Ft Vs Exposure Curve Points Discovered in Error by No More than 0.1 Kw/Ft Nominal Maphlgr Limit 8.52 Kw/Ft.Caused by Interpolation of Tech Specs W/O Grid or Breakpoints (← links)
- 05000220/LER-1976-016, :on 760427,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration (← links)
- 05000220/LER-1976-015, :on 760424,fish Impingement Found Increasing. Caused by Annual Migration (← links)
- 05000220/LER-1976-014, :on 760420,fish Impingement on Traveling Screens Found in Excess of ETS Limits of 20,000/24 H.Caused by Annual Migration (← links)
- 05000220/LER-1976-017, :on 760428,fish Impingement Upon Traveling Screens Found in Excess of ETS Limits of 20,000 Per 24 H.Caused by Annual Migration (← links)
- 05000220/LER-1976-018, :on 760508,fish Impingement on Traveling Screens Determined to Be in Excess of 20,000 Per 24 H.Cause Unknown. Influx of Alewives & Rainbow Smelt Occurs Annually (← links)
- 05000220/LER-1983-046-03, /03L-0:on 831230,12 Temporary Change Submittals Re Jumper Block Annunciator Relay Log Not Reviewed within 7-day Tech Spec Limit.Caused by Breakdown in Paper Flow. Instructions Revised (← links)
- 05000220/LER-1995-003-01, :on 950516,discovered That Three I&C Sps Not Performed in Compliance W/Frequency in TS SRs Due to Cognitive Personnel Error.Missed Surveillances Performed & Affected I&C Procedures Will Be Revised (← links)
- 05000220/LER-1984-002, :on 840327,small Leak & Evidence of Other Leakage Discovered in CRD Housings.Caused by IGSCC in Stub Tube Heat Affected Zone of Tube to Housing Welds.Housings Rolled (← links)
- 05000220/LER-1976-019, :on 760423,turbine Anticipatory Trip Bypass Reactor Scram Switch Actuated Higher than Required Psig During Surveillance Testing.Caused by Setpoint Drift.Switch Recalibr & Returned to Svc (← links)
- 05000220/LER-1976-021, :on 760515,shutdown Cooling Sys dc-operated Instrumentation Valve 38-02 Failed to Function.Caused by Open in in Motor Windings.Motor Rewound (← links)
- 05000220/LER-1976-020, :on 760423,switch 1B05C,indicating Emergency Cooling High Flow & Isolating Sys,Actuated Higher than Required 19 Psid.Caused by Setpoint Drift (← links)
- 05000220/LER-1976-022, :on 760527,review Revealed That Fish Impinged Exceeded ETS Limits During Routine Sampling on 760519-27. Cause Not Related to Station Operation.Species of Fish Involved Migrate Inshore in Spring (← links)
- 05000220/LER-1976-023, :on 760625,smoke Observed from Relay 4-112 B/40. Caused by Apparently Shorted Coil,Resulting in Blown Fuse. Relay Replaced (← links)
- 05000220/LER-1976-024, :on 760613,average Power Range Monitors 17 & 18 Failed to Produce Scram Signal at Required Flow Bias Setpoint.Caused by Setpoint Drift.Instrument Recalibr to Required Specs (← links)
- 05000220/LER-1976-025, :on 760627,average Power Range Monitors 11 & 15 Failed to Produce Scram Signal at Required Flow Bias Setpoint.Caused by Setpoint Drift.Instruments Calibr to Required Specs (← links)
- 05000220/LER-1976-029, :on 760805,milk Sample Not Analyzed for I-131 within 8 Days of Collection.Caused by Mail Backlog Due to Holiday Weekend (← links)
- 05000220/LER-1976-030, :on 760805,review Revealed That Condenser Delta Temp & Discharge Canal Temp Not Recorded Hourly During 760717-22.Caused by Computer Typers Being Down Due to New Instrumentation Installation.Data Through 760731 Invalid (← links)
- 05000220/LER-1976-031, :on 760809,feedwater Pump 11 Failed to Start When Manually Initiated.Cause by Agastat Time Delay Model 2462 PD Failure (← links)
- 05000220/LER-1976-032, :on 760827,RE-22A Tripped Higher than Required Psig Value During Surveillance Testing of Main Steam Line Break Instrumentation.Caused by Setpoint drift.RE-22A Recalibr (← links)
- 05000220/LER-1976-033, :on 760908,Tech Spec Required Surveillance on Vacuum Breaker Exercising Following Relief Valve Discharge to Torus Not Performed Following Scrams on 760806 & 23. Caused by Not Posting Requirements on Checkoff Sheets (← links)
- 05000220/LER-1976-034, :on 761012,milk Samples Collected on 760920 Not Counted Until 760928-30.Caused by Delay in Shipping.W/ (← links)
- 05000220/LER-1976-035, :on 761012,benthos Bimonthly Collection for Aug 1976 Not Performed Unitl 760904.Caused by Recent OSHA Regulations Imposed on Prof Divers (← links)
- 05000220/LER-1976-036, :on 761015,lo-lo-lo Reactor Water Level Switch RE-18A Failed to Provide Trip at Indicated Inches.Caused by Apparent Setpoint Drift.Switch Inspected & Recalibr.W/ (← links)
- 05000220/LER-1976-037, :on 761019,monthly Chemical Proportional Composite for Jul 1976 Inadvertently Discarded Prior to Analyzing Chemical Liquid Waste.Caused by Lack of Prompt Labeling. Procedures Reviewed (← links)
- 05000220/LER-1976-039, :on 761116,I-131 Concentration in 761101 Milk Sample Found in Excess of 19 Pci Per Liter.Caused by Chinese Weapon Testing Prior to Sampling (← links)
- 05000220/LER-1976-040, :on 761210,lo-lo-lo Reactor Water Level Sensors RE-18A,B & C Did Not Actuate within Required Tolerance Setpoint Band.Caused by Apparent Setpoint Drift (← links)
- 05000220/LER-1976-041, :on 761210,sensors Actuated Sooner than Required Setpoint During Routine Surveillance Testing on High Drywell Pressure.Caused by Apparent Setpoint Drift (← links)
- 05000220/LER-1976-042, :on 761222,reactor Bldg Integrity Disrupted. Caused by Two Doors Being Opened Simultaneously in Reactor Bldg Extension Air Lock.Standing Order Nmpso 12 Issued, Specifying Door Opening Control Procedures (← links)
- 05000220/LER-1976-043, :on 761025,feedwater Pump 12 Taken Out of Svc. Caused by Repairs Made to Sealwater Strainer & Small Gear Box Leads W/Unit on Load (← links)
- 05000220/LER-1976-044, :on 761116,one Emergency Vent Loop Taken Out of Svc.Caused by Repairs Being Made on Bent Observation Door While Unit on Load (← links)
- 05000220/LER-1976-045, :on 761231,sodium Valve for Liquid Effluents Found Above Limits.Caused by Pump Rate Exceeding Allowable Concentration in Makeup Demineralizer Waste Tank. Surveillance Procedure Revised (← links)
- 05000220/LER-1977-001, :on 770106,rod Worth Minimizer Operability Changed.Caused by Use of Incorrect GE Ref.Different RWM Operability Periods Specified in Suppl 3 to NEDO-20360. Operating Procedure OP-37 & Tech Spec Changes Prepared (← links)
- 05000220/LER-1977-002, :on 770114,one Main Steam Line High Flow Sensor Not Set to Actuate within Required Tolerance Band.Caused by Apparent Setpoint Drift in Conservative Direction.Setpoint Corrected to Actuate at 105 Psig (← links)
- 05000220/LER-1977-003, :on 770304,reactor low-low-low Instrument Level Setpoint Found Below Required Setting.Caused by Instrument Setpoint Change.Setpoint Reset (← links)
- 05000220/LER-1977-004, :on 770307,one Solenoid Operated Pressure Relief Valve Found Set Lower than Required.Caused by Instrument Setpoint Change.Setting Reset (← links)
- 05000220/LER-1977-005, :on 770309,one Cleanup Sys Area High Temp Alarm Trip Setpoint Higher than Required.Caused by Setpoint Change.Setpoint Reset (← links)
- 05000220/LER-1977-006, :on 770309,reset Switch Contacts Found in Position Which Would Prevent Operation of Three of Six Solenoid Operated Pressure Relief Valves for Automatic Depressurization.Cause Not Stated (← links)
- 05000220/LER-1977-007, :on 770317,core Spray Header Differential Pressure Alarm Setpoint Found Above Criterion.Cause Not Stated.Alarm Setpoint Reset (← links)
- 05000220/LER-1977-008, :on 770317,discharge Pressure Switch in Feedwater Pump 12 Discharge Failed in Closed Position,Indicating Positive Pump Discharge Pressure.Caused by Pressure Switch Giving False Indication.Switch Replaced (← links)
- 05000220/LER-1977-010, :on 770324,secondary Containment Integrity Broken. Caused by Employee Opening Reactor Bldg Door While Other Door in Air Lock Was Open.Containment Integrity Restored. Supervisors Instructed to Review Requirements W/Depts (← links)
- 05000220/LER-1977-011, :on 770320,one Reactor low-low Water Level Trip Found Lower than Required Setpoint.Caused by Setpoint Change While Sys Bypassed for Maint & Special Level Instrumentation in Svc (← links)
- 05000220/LER-1977-014, :on 770326,during Emergency Condenser Vent Monitor Calibr,Test Source Indicated 50 M/H Instead of 6 M/H. Cause Not Stated.Detector Output Reset to Produce Monitor Readings Corresponding to Test Source (← links)
- 05000220/LER-1977-015, :on 770404,shutdown Pump Tripped During Lowering of Water Level to Clear Temporary Shield Work Platform. Caused by Excessive Water Lowering in Reactor Annulus Area. Addl Water Level Monitoring Added (← links)
- 05000220/LER-1977-016, :on 770406,possible Tech Spec Noncompliance Found Re Frequency,Location & Sampling Period.Caused by Ambiguous Wording Concerning Trapnet Procedures.Environ Contractor Will Propose & Implement Trapnet Procedures (← links)
- 05000220/LER-1977-018, :on 770416,one Pair of Drywell Air Vent & Fill Valves Would Not Pressurize to Type C Isolation Valve Leak Rate Test Conditions,Indicating Probable Leakage in Excess of Tech Spec.Cause Not Stated (← links)
- 05000220/LER-1977-019, LERs 77-019 & 020:on 770427,two Containment Oxygen Sampling Sys Check Valves Leaked in Excess of Single Valve Criteria. Cause Not Stated.O Rings Replaced & Valves Retested (← links)
- 05000220/LER-1984-001, :on 840320,problems Encountered W/Operation & Testing of GE Type Ak Circuit Breakers,Resulting in Failure to Trip &/Or Premature Trip on Overcurrent.Caused by Age Induced Grommet Hardening (← links)
- 05000220/LER-1983-041-03, /03L-0:on 831216,Accurex Fuel Zone Water Level Monitoring Sys Experienced Loss of Memory on Channel 12B. Caused by Failure of Plant Process Computer Interface. Program Reloaded Into Accurex (← links)
- 05000220/LER-1983-039-03, /03L-0:on 831202,steam Electronic Relief Valve Tail Pipe Temp Sensors Indicated Loose Connections on Thermocouple.Cause Undetermined.Investigation Expected During Next Drywell Entry (← links)
- 05000220/LER-1983-043-03, /03L-0:on 831128,fuel Zone Water Level Measuring Sys (Accurex) Found in Sys Idle Condition for Channel 11(A) at Time of Planned Surveillance Procedure N1-ISP-36- Icc.Cause Not Yet Known.Investigation Under Way (← links)
- 05000220/LER-1983-042-03, /03L-0:on 831122,fuel Zone Water Level Measuring Sys (Accurex) Taken Out of Svc to Modify Program to Improve Accuracy.Accurex Modified Per GE Recommendations & Returned to Svc in 1 H (← links)
- 05000220/LER-1983-044-01, /01T-0:on 831128,reactor Bldg Penetration Found Unsealed.Caused by Shrinking of Sealing Matl Forced Out of Penetration Due to Pressure Differential.Fire Watch Established.Penetration Resealed (← links)
- 05000220/LER-1983-040-03, /03L-0:on 831122,main Steam Radiation Monitor 122 Observed Gradually Degrading,Resulting in Low Readings. Caused by Loose Signal Cable Connector & Loss of Detector Sensitivity.Connector & Detector Replaced (← links)
- 05000220/LER-1983-037-03, /03L-0:on 831110,during Routine Surveillance Testing on Core Spray Sys,Leakage from Vent Line Observed on Core Spray Topping Pump 121.Caused by Cracked 3/4-inch Diameter Nipple on Pump Vent Line 121 (← links)
- 05000220/LER-1983-038-03, /03L-0:on 831110,discovered That Emergency Condenser Isolation Valves Not Stroke time-tested Correctly. Caused by Nonconforming Test Procedure.Procedure Revised to Comply W/Tech Specs (← links)
- 05000220/LER-1983-035-03, /03L-0:on 831105,feedwater Pump 12 Removed from Svc Due to Overheating Bearing.Caused by Discharge Check Valve Failure to Close,Resulting in Reverse Rotation of Pump.Valve Seated & Pinion Gears Replaced (← links)
- 05000220/LER-1983-036-03, /03L-0:on 831107,fuel Zone Water Level Monitoring Accurex Sys Found in Idle State.Cause Unknown Suspected That Stop Signal Received Stopping Program.Accurex Logger Restarted & Addl Surveillance Performed (← links)
- 05000220/LER-1983-028-03, /03L-0:on 831027,oil Reservoir Indicators to Snubbers 39-HS-18 & 19 Found Off Scale on Low End.Snubbers Removed,Replaced,Tested & Found Operable.No Cause Noted.No Corrective Action Necessary (← links)
- 05000220/LER-1983-031-04, /04L-0:on 831102,differential Temp Outputs at 200 & 100 Ft Discovered Out of Calibr.Cause Unknown.Outputs Readjusted,Procedures Modified & Frequency of Testing Increased (← links)
- 05000220/LER-1983-034-03, /03L-0:on 831101,while Performing Maint Work on Reactor Bldg Air Lock Doors,Doors Opened Simultaneously Several Times.Cause Not Stated.Special Training Developed in Response to IE Insp Rept 50-220/83-17 (← links)
- 05000220/LER-1983-033-03, /03L-0:on 831018,during Normal Operation,Visual Insp of Snubber 39-4S-21 Revealed Oil Reservoir Indicated off-scale Toward Low End.Snubber Removed & Proven Operable. Snubber Replaced 831019 to Insure Operability (← links)
- 05000220/LER-1983-029-04, /04T-0:on 830929,analysis of Shoreline Sediment Sample Showed Cs-137 Level Exceeding ETS Control Sample Level.Caused by Decrease in Control Sample Low Level Dose Level During May 1983 (← links)
- 05000220/LER-1983-032-01, /01T-0:on 831017,3/4-inch Test Valve Found Opened, Allowing Free Communication Between Torus Liquid Region & Secondary Containment Atmosphere Through Penetration XS-348. Cause Undetermined.Procedures Changed (← links)
- 05000220/LER-1983-027-03, /03L-0:on 830923,during Normal Full Power Operations,Two of Three Feedwater Strings Tripped & Cooler Water Entered Reactor Core.Caused by Bad Fuse Holder in Reactor Trip Bus 131.Fuse Holder Replaced (← links)
- 05000220/LER-1983-030-01, /01T-0:on 831003,while Carbon Dioxide Fire Suppression Sys Out of Svc for Surveillance Testing, Continuous Fire Watch Changed to Unapproved Continuous Fire Patrol.Caused by Manpower Problem (← links)
- 05000220/LER-1983-026-03, /03L-0:on 830909,inputs Indicated Excessive Drift Across Thermocouple B410.Cause Unknown.Poor Connection in Terminal Box Suspected.Corrective Action Will Be Determined During Next Cold Shutdown (← links)
- 05000220/LER-1983-024-03, /03L-0:on 830826,one of Two Inadequate Core Cooling Reactor Core Level Indicators Failed Surveillance Test.Caused by High Register Value Due to Bad Contacts.Sys Reinitialized & Register Zeroed (← links)
- 05000220/LER-1983-024-04, /04L-0:during May,Lower Limit of Detection Sensitivity for Fish Analysis Sample Data Not Met for Many Radionuclide Samples.Caused by Incorrect Converting of LLD Values (← links)
- 05000220/LER-1983-045-03, /03L-0:on 831221,site Operations Review Committee Failed to Review Temporary Change Re Fuel Handling Procedure N1-FHP-32, Fort St Vrain Cask Handling, within 7 Day Tech Spec Limitation (← links)
- 05000220/LER-1983-018-03, /03L-0:on 830709,Agastat Time Delay Relay 11K62A Failed to Time Out at Correct Time & to Initiate Emergency Cooling Sys.Caused by Dirty Timing Orifice.Needle Valve Exercised & Timer Reset (← links)
- 05000220/LER-1983-022-01, /01T-0:on 830721,during Normal Operation,Gap Observed Under Outside Reactor Bldg Track Bay Door.Caused by Failure to Reinstall Removable Seals.Seals Installed. Procedures Reviewed W/Personnel (← links)
- 05000220/LER-1983-015-03, /03L-0:on 830624,while Performing Surveillance Test N1-ISP-RVT on Main Steam Electromatic Relief Valve Tailpipe Temp Sensors,Inputs Indicated Excessive Drift.Cause Unknown.Corrective Action Being Evaluated (← links)
- 05000220/LER-1983-014-03, /03L-0:on 830615,16,17,20 & 21,115-kV Offsite Power Line Removed from Svc for 10 H Each Day.Caused by Need to Allow Const of 115 Kv Line for Unit 2,currently Under Const.Line Returned to Svc Each Day (← links)
- 05000220/LER-1983-016-03, /03L-0:on 830718,during Normal Operations,Main Steam Line Radiation Monitor 122 Declared Inoperable After Displaying Low Readings Since 830717.Caused by Defective Detector Output Connector on Monitor 122 (← links)
- 05000220/LER-1983-020-03, During Major Outage While Performing Local Leak Rate Testing,Leakage from Valves 58.1-01 & 58.1-02 Found to Exceed Tech Specs.Caused by Corrosion Buildup.New Clapper Installed (← links)
- 05000220/LER-1983-004-03, /03L-0:on 821130,shoreline Sediment Samples Yielded Concentration of Cs-137 in Excess of Tech Spec Requirements.Possibly Caused by Site Liquid Effluents. Addl Sampling Will Be Conducted (← links)
- 05000220/LER-1983-003-04, /04L-0:from 821001-31,lower Limit of Detection (LLD) Sensitivity Not Met for Many Radionuclides During Analysis of Oct Fish Samples.Caused by Higher LLD Values Resulting from Conversion of Wet Weight to Dry Weight Units (← links)
- 05000220/LER-1983-005-01, /01T-0:on 830315,during Major Maint Outage,Reactor Bldg Ventilation Sys Isolated & Emergency Ventilation Sys Initiated Due to Release of Radioactive Contaminates.Caused by Failure of Cleanup Filter Sludge Tank Indicator (← links)
- 05000220/LER-1983-012-03, /03L-0:on 830609,10 Time Delay Relay 11K62 Stuck in Energized Position & Failed to Time Out & Initiate Emergency Cooling Sys.Caused by Dirty Clutch Plunger. Periodic Cleaning of Plunger Initiated (← links)
- 05000220/LER-1982-015-03, /03L-0:on 821117 & 18,deluge Valves 101N & 101S, Protecting Reserve Power Transformer,Intentionally Made Inoperable to Replace Pressure Switches to Upgrade Fire Protection Sys.Deluge Sys Returned to Svc After Mod (← links)
- 05000220/LER-1983-007-03, /03L-0:on 830419,30-ft Wind Direction Sensor Azimuth Alignment Found Misaligned by 9.8 Degrees.Caused by Improper Alignment of Mounting Plates When Installed.Sensors Readjusted & Checked (← links)
- 05000220/LER-1983-001-04, /04L-0:on 830122,while Performing Environ Surveillance testing,30 Ft Wind Direction Sensor Alignment Azimuth Indicator Found High.Caused by Improperly Installed Mounting Plate.Sensor Readjusted (← links)
- 05000220/LER-1982-023-03, /03L-0:on 821218,while Performing Local Leak Rate Testing,Valve 201.2-71 Exceeded Tech Specs.Caused by Poor Seating Resulting from Dirt & Corrosion.Valve Will Be Cleaned Followed by Retest (← links)
- 05000220/LER-1982-022-03, /03L-0:on 821218,while Performing Local Leak Rate Testing,Leakage from Valves 201.2-27 & 201.2-28 Exceeded Tech Specs.Caused by Poor Seating Resulting from Dirt & Corrosion.Valves Will Be Cleaned (← links)
- 05000220/LER-1982-021-03, /03L-0:on 821215,while Performing Local Leak Rate Testing,Leakage from Valves 39-11,39-12,39-13 & 39-14 Exceeded Tech Specs.Caused by Dry Packing Condition Resulting from Current Shutdown.Valves Will Be Repacked (← links)
- 05000220/LER-1982-020-03, /03L-0:on 821213,while Performing Local Leak Rate Testing,Leakage from Valves 58.1-01 & 58.1-02 Exceeded Tech Specs.Caused by Valve Order.Existing Order Modified W/Check Valve Followed by Gate Valve (← links)
- 05000220/LER-1983-002-04, /04L-0:on 821018,while Analyzing Quarterly Canal Water Samples,Tritium Concentration in Inlet Sample Was 39.2 Times Control Result.Caused by Normal Intake & Discharge Tunnels Operating in Reverse Flow Mode (← links)
- 05000220/LER-1982-012-04, /04L-0:on 820831,lower Limit of Detection Sensitivity Not Met for Several Radionuclides in Analysis of Fish Samples.Tech Spec Parameter Too Narrow for Wet/Dry Weight Units Conversion.Tech Spec Revision Underway (← links)
- 05000220/LER-1982-016-03, /03L-0:on 821123-24,during Hydro of Main Condenser,Low Level Radioactive Water Totalling 7,200 Gallons & 2 Mci (Gamma Emitters) Accidentally Discharged. Caused by Several Leaking Tubes.Tubes Plugged (← links)
- 05000220/LER-1981-019-03, /03L-0:on 810607,while Performing Local Leak Rate testing,1-inch Fisher Isolation Valve 39-11 of Emergency Condenser Steam Line Drain Sys Failed to Seat.Caused by Worn Seating & Packing Matls.Valve Repacked (← links)
- 05000220/LER-1982-010-03, /03L-0:on 820323,during Cold Shutdown,While Conducting Plant Insp,Operator Noticed Trouble Annunciator on Analog Trip Card for High Drywell Pressure 201.2-476C. Cause Under Investigation.Card Replaced (← links)
- 05000220/LER-1982-009-01, Water Observed Leaking from Insulation on Recirculation Piping Discharges 11 & 15 from Reactor Vessel.Caused by Cracking in Riser Elbow Welds. Recirculation Piping Replaced (← links)
- 05000220/LER-1978-039-03, /03L-0 on 781103:surveillance Test N1-ISP-RE02 Revealed Rx Lo-Lo Water Level Switch W/Trip Setpoint of +2 Inches Water.Caused by Instru Drift.Setpoint Reset (← links)
- 05000220/LER-1978-037-03, /03L-0 on 781027:test Revealed Trip Setpoint of 26.5 Inches Water on One Vacuum Switch in Vacuum Relief Sys from Pressure Supression Chamber to Rx Bldg.Caused by Instru Drift in a Mercoid Model CP4122 Vacuum Switch (← links)
- 05000220/LER-1978-036-04, /04T-0 on 781025:improper Appl of Brook Model 9456 Oval Gear Flowmeter Combined W/Failed Seal on Caustic Addition Pump Caused High Concentration of Sodium & Sulfate & Degraded Capability to Control Rate of Discharge (← links)
- 05000220/LER-1978-033-03, /03L-0 on 780916:Surveillance Tests on Barton Model 289 Pressure Indicating Switches Showed Changes in Setpoints Due to Instru Drift.Rev Surveillance Test Scheds Now Adequate to Ensure Early Detection of Drifts (← links)
- 05000220/LER-1981-025, Has Been Canceled (← links)
- 05000220/LER-1982-008, :on 820317,discovered Potential Path for Reactor Steam from Emergency Condenser Steam Line Vents to Atmosphere If Emergency Condenser Tube Leaks Occur.Caused by Mods Made to Comply w/NUREG-0737,Item II.B.1 (← links)
- 05000220/LER-1982-008-01, /01T-0:on 820317,review of Surveillance Test N1-ST-R7 Revealed Potential for Reactor Steam to Leak to Atmosphere from Emergency Condenser Vents.Caused by Potential Sys Leaks.Sys Modified Per NUREG-0737 Item II.B.1 (← links)
- 05000220/LER-1982-005-03, /03L-0:on 820208,115 Kv Line Taken Out of Svc for Maint,Placing Plant in Limited Condition of Operation.Maint on Line Required Due to Open Loop.Line Repaired & Returned to Svc (← links)
- 05000220/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000220/LER-1982-006-04, /04L-0:on 820225,during Normal Operation,While Tempering Plant Inlet Canal,Plant Discharge Temp Exceeded 85 F.Caused by Increase in Lake Temp Due to Weather Conditions & Inability to Fully Lower Tempering Gate (← links)
- 05000220/LER-1982-006, Forwards LER 82-006/04L-0 (← links)
- 05000220/LER-1982-007-04, /04L-0:on 820222,while Reviewing Environ Radiation Fish Analysis Sample Data,Lower Limit of Detection Sensitivity Was Determined Not Met for Nov 1981.Cause Not Stated.Tech Spec Proposal Being Submitted to Update Stds (← links)
- 05000220/LER-1982-007, Forwards LER 82-007/04L-0 (← links)
- 05000220/LER-1982-004-01, /01T-0:on 820207,during Routine 115-KV Breaker Exercising,Ground Directional Relay Caused Opening of Breaker Alternate 115-KV.Caused by Momentary Loss Offsite Power.Power Restored After Closing Oswego-NMP1 Breaker (← links)
- 05000220/LER-1982-004, Forwards LER 82-004/01T-0 (← links)
- 05000220/LER-1982-003-01, /01T-0:on 820204,at 100% Power,Reactor Bldg Ventilation Sys Isolated & Emergency Ventilation Sys Initiated Due to Radioactive Release.Caused by Overflow of Reactor Water Cleanup Sys Filter Sludge Tank (← links)
- 05000220/LER-1982-003, Forwards LER 82-003/01T-0 (← links)
- 05000220/LER-1982-002-01, /01T-0:on 820129,NRC Inspector Discovered That Primary Containment Following DBA LOCA May Not Be Vented Using Operating Procedure Due to Inaccessibility of Reactor Bldg.Combustible Gas Control Sys Will Be Installed (← links)
- 05000220/LER-1982-002, Forwards LER 82-002/01T-0.LER 82-001 Has Been Deleted & Will Not Be Submitted (← links)
- 05000220/LER-1981-054-03, /03L-0:on 811221,insertion of Shallow Control Rods Resulted in Average Planar Linear Heat Generation Rate in Excess of Tech Spec Limits.Caused by Flux Coupling Between Control Rods.Extra Rods Inserted & Tech Specs Modified (← links)
- 05000220/LER-1981-054, Forwards LER 81-054/03L-0 (← links)
- 05000220/LER-1981-021-03, /03L-0:on 810609,temporary Changes to Operating Procedure N1-OP-33A & to Station Jumper Log 975 Found Not to Have Been Performed within 7-day Limit.Cause Not Given. Reviews Completed (← links)
- 05000220/LER-1981-021, Forwards LER 81-021/03L-0 (← links)
- 05000220/LER-1981-052-03, /03L-0:on 810812,failure of One Reactor Vessel Electromatic Relief Valve Thermocouple & Two Reactor Vessel Head Safety Valve Thermocouples Noted in Testing.Cause to Be Investigated Given Drywell Access in Next Cold Shutdown (← links)
- 05000220/LER-1981-052, Forwards LER 81-052/03L-0 (← links)
- 05000220/LER-1981-049-03, /03L-0:on 811112,during Normal Operation,Feedwater Hydraulic Snubber 29-HS-6 Taken Out of Svc for Preventative Maint Because of Small Oil Leak.Cause Not Stated.Snubber Rebuilt & Returned to Svc (← links)
- 05000220/LER-1981-049, Forwards LER 81-049/03L-0 (← links)
- 05000220/LER-1981-008-01, /01X-1:on 810316,ultrasonic Testing Revealed Indication on Southeast Reactor Feedwater Nozzle Inside Bore.Caused by Inadequate Investigation.Dye Penetrant & Surface Exam Revealed Indication Nonreportable (← links)
- 05000220/LER-1981-008, Forwards LER 81-008/01X-1 (← links)
- 05000220/LER-1981-051-04, /04L-0:on 811109,while Reviewing Environ Radiation Fish Analysis Sample Data,Lower Limit of Detection Sensitivity (LLD) Not Met.Caused by Higher LLD Values When Test Data Converted from Wet to Dry Weight Units (← links)
- 05000220/LER-1981-050-03, /03L-0:on 810715,reactor Bldg Ventilation Duct Radiation Monitor Showed Abnormal Spiking Which Initiated Emergency Ventilation Sys.Caused by Malfunctioning sensor-convertor Unit.Unit Replaced & Calibr (← links)
- 05000220/LER-1981-051, Forwards LER 81-051/04L-0 (← links)
- 05000220/LER-1981-050, Forwards LER 81-050/03L-0 (← links)
- 05000220/LER-1981-048-03, /03L-0:on 811019,during Normal Operation,Liquid Poison Pump 11 Was Removed from Svc.Prior to Removal,Pump 12 Was Run to Prove Operability.Pump Removed for Scheduled Maint of Packing (← links)
- 05000220/LER-1981-048, Forwards LER 81-048/03L-0 (← links)
- 05000220/LER-1981-047-03, /03L-0:on 811020,while Reviewing Surveillance Records,Found Routine Calibr of Refueling Platform High Range Area Radiation Monitors Not Completed within Allowable Test Interval.Caused by Unusually Heavy Test Load (← links)
- 05000220/LER-1981-047, Forwards LER 81-047/03L-0 (← links)
- 05000220/LER-1979-015-03, /03X-1:on 790610,during Refueling outage,10-s Time Delay 12K62 Failed in Conservative Direction,Creating Alarm Condition.Caused by Natural end-of-life.Clutch Coil Replaced (← links)
- 05000220/LER-1979-015, Forwards LER 79-015/03X-1 (← links)
- 05000220/LER-1981-044-03, /03L-0:on 810914,feedwater Pump 11 Removed from Svc for Scheduled Repair of Lube Oil Leak & Water Seal Leak & Feedwater Pump 12 Put in Svc.Caused by Erosion in Seal Face.Seals Replaced (← links)
- 05000220/LER-1981-044, Forwards LER 81-044/03L-0 (← links)
- 05000220/LER-1981-043-04, /04T-0:on 810908,power Outage at Wine Creek Substation Affected Offsite Environ Station G & Onsite Stations G,E,F,D-1,D-2,K,H,I & J.Cause Not Stated.Station Will Purchase Portable Monitors W/Continuous Capability (← links)
- 05000220/LER-1981-043, Forwards LER 81-043/04T-0 (← links)
- 05000220/LER-1981-045-03, /03L-0:on 810916,temporary Change to Operating Procedures N1-ST-V4 Not Reviewed within 7-day Limitation. Caused by Mail Mixup.Processing Methods Revised (← links)
- 05000220/LER-1981-045, Forwards LER 81-045/03L-0 (← links)
- 05000220/LER-1981-039-03, /03L-0:on 810816,during Surveillance Testing,Msiv 122 Failed to Operate to 7% Closed Position.Caused by Friction in Piston Assembly Which Allowed Timer to Time Out Before Valve Had Stroked Fully.Valve Closed & Retested (← links)
- 05000220/LER-1981-039, Forwards LER 81-039/03L-0 (← links)
- 05000220/LER-1981-035-03, /03L-0:on 810721,site Operations Review Committee Failed to Review Temporary Change within 7-day Limit.Caused by Mail Mixup.All Temporary Procedure Changes Will Be Hand Carried to Committee Secretary (← links)
- 05000220/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000220/LER-1981-038-04, /04T-0:on 810709,white Sucker Fish Samples Collected from 810521-0528 Found to Contain Co-60 in Concentrations Slightly Higher than Control Values.Caused by Sample Contamination During Handling or Lab Analysis (← links)
- 05000220/LER-1981-037-04, /04T-0:on 810709,poultry Sample Taken 3.5 Miles South of Site on 810526 Found to Contain Co-58 & Co-60 in Concentrations Exceeding Control Values.Caused by Sample Contamination During Handling or Lab Analysis (← links)
- 05000220/LER-1981-034-03, /03L-0:on 810709,MSIV 122 Failed Stroke Test During Surveillance Test N1-ST-V4.Caused by Test Circuit Not Operating Valve to 7% Closed Position Due to Lack of Friction Between Solenoid Sys & Piston.Piston Lubricated (← links)
- 05000220/LER-1981-034, Forwards LER 81-034/03L-0 (← links)
- 05000220/LER-1981-013-03, /03L-0:on 810428,during Outage Frequency Isolation Valve Pneumatic Leak Rate testing,2-inch Rx Head Spray Isolation Valve 34-01 Did Not Meet Tech Specs Min Leak Rate Requirement for One Isolation Valve (← links)
- 05000220/LER-1981-013, Forwards LER 81-013/03L-0 (← links)
- 05000220/LER-1981-033-01, /01T-0:on 810709,while Operating at Approx 290 Mwe,Shaft Driven Feedwater Pump Start Resulted in Reactor Water Conductivity & Chloride Excursion.Caused by Incomplete Flush of Feedwater Sys.Reactor Water Cleanup Sys Initiated (← links)
- 05000220/LER-1981-033, Forwards LER 81-033/01T-0 (← links)
- 05000220/LER-1981-028-03, /03L-0:on 810624,during Refueling Outage,While Performing Surveillance Test ISP-02-13.1B,turbine Oil Switch Was Found at 175 Psi.Cause Not Specified.Switch Recalibr to Provide for Correct Pressure Settings (← links)
- 05000220/LER-1981-028, Forwards LER 81-028/03L-0 (← links)
- 05000220/LER-1981-018-03, /03L-0:on 810526,during Refueling Outage Local Leak Rate testing,4-inch Crane Check Valve Failed to Meet Tech Spec Min Leak Rate Requirement.Caused by Dirt Between Teflon on Clapper & Valve Body.Parts Cleaned (← links)
- 05000220/LER-1981-018, Forwards LER 81-018/03L-0 (← links)
- 05000220/LER-1981-015-03, /03L-0:on 810508,during Routine Testing of Reactor Bldg Ventilation Monitors,Sys Failed to Actuate,Although Sys Responded Normally to Simulated Signal.Cause Unknown. Radiation Monitors Recalibr to Alarm Using Gamma Source (← links)
- 05000220/LER-1981-015, Forwards LER 81-015/03L-0 (← links)
- 05000220/LER-1981-016-03, /03L-0:on 810515,while Performing Outage Frequency Isolation Valve Local Leak Rate Testing, Streamseal Isolation Valves 201-31 & 201-32 Did Not Meet Tech Spec Min Leak Rate Requirement.Streamseal Replaced (← links)
- 05000220/LER-1981-016, Forwards LER 81-016/03L-0 (← links)
- 05000220/LER-1981-017-03, /03L-0:on 810521,during Routine Testing & Calibr, Core Spray Sparger Delta Pressure Alarms RV30A & RV30B Were Found to Be Out of Tolerance.Caused by Instrument Drift. Devices Recalibr to Alarm within Tolerance (← links)
- 05000220/LER-1981-012-03, /03L-0:on 810420,during Refueling outage,1-inch Drywell Sampling Isolation Valve 201.7-02 Did Not Meet Tech Spec Min Leak Rate Requirement for One Isolation Valve. Caused by Dust Accumulation on Mating Surfaces (← links)
- 05000220/LER-1981-017, Forwards LER 81-017/03L-0 (← links)
- 05000220/LER-1981-012, Forwards LER 81-012/03L-0 (← links)
- 05000220/LER-1981-014-03, /03L-0:on 810429,during Diesel Fire Pump Test, Diesel Auto Started at Lower than Required Setpoint in Fire Sys Header.Caused by Mercoid O-250 Psig Pressure Switch Failure Due to Natural End of Life.Switch Replaced (← links)
- 05000220/LER-1981-014, Forwards LER 81-014/03L-0 (← links)
- 05000220/LER-1981-026-03, /03L-0:on 810624,while Performing Surveillance Test Procedure of Torus/Drywell Vacuum Relief Valves, Switches Which Monitor Distance Between Clapper & Seat Found Out of Spec.Cause Not Stated.Switches Recalibr (← links)
- 05000220/LER-1981-026, Forwards LER 81-026/03L-0 (← links)
- 05000220/LER-1981-027-03, /03L-0:on 810623,leak Rate Test on Reactor Feedwater Isolation Valves 31-03 & 31-04 Showed Unacceptable Leakage.Caused by Limitorque Operator Failing to Put Out Enough Torque to Make Valve Seat Properly.Setting Increased (← links)
- 05000220/LER-1981-027, Forwards LER 81-027/03L-0 (← links)
- 05000220/LER-1981-029-03, /03L-0:on 810623,during Carbon Dioxide Hazards Puff Test,Hazards 1,2,5,9 & 12 Were Found Inoperable.Caused by Loose Wires on 1 & 12 & Sticky Relays on 2,5 & 9.Loose Wires Tightened & Sticky Relays Lubricated (← links)
- 05000220/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000220/LER-1982-018-03, /03L-0:on 821207,during Maint Outage,Leakage from Valves 68-05 & 68-08 Found Exceeding Tech Specs.Caused by Poor Seal Design.Mods Will Be Completed During Current Outage & Followed by Retest (← links)
- 05000220/LER-1982-017-03, /03L-0:on 821206,during Maint Outage,Leakage from Valves 68-06 & 68-09 Found Exceeding Tech Specs.Caused by Poor Seal Design.Mods Will Be Completed During Current Outage & Followed by Retest (← links)
- 05000220/LER-1982-001, Has Been Canceled (← links)
- 05000220/LER-1983-021-03, /03L-0:on 830720,22,26 & 28,emergency Cooling Sys Loop 11 Taken Out of Svc for Periods Up to 5 H.Caused by Attempt to Reseat Isolation Valve 39-05.Valve Seat Lapped & Loop Returned to Svc (← links)
- 05000220/LER-1983-017-03, /03L-0:on 830707,HPCI Feedwater Booster Pumps 11 & 13 Taken Out to Svc to Inspect Impellers Due to Similar Problem on nonsafety-related Pump.Parts of Strainer Found in Pumps But Pumps Undamaged (← links)
- 05000220/LER-1983-019-03, /03L-0:on 830623,two Monthly Surveillance Tests on Inadequate Core cooling-accident Level Monitor Missed Following 811231 Installation.Surveillance Procedures Generated & Added to Schedule (← links)
- 05000220/LER-1983-010-03, /03L-0:on 830524,core Topping Pump 121 Removed from Svc to Replace Packing.Caused by Air Leaking Due to Iltr Pressure Introduction in Pump.Packing Replaced & Pump Returned to Svc within 22 H (← links)
- 05000220/LER-1983-011-03, /03L-0:on 830604,electromatic Relief Valve 121 Failed to Open.Caused by Dirty Pilot Due to Oxide Buildup During Extended Outage.Pilot Cleaned & Retested & Normal Shutdown Initiated (← links)
- 05000220/LER-1983-006, /03L-0:on 830426,control Room Ventilation Sys Removed from Svc for Mods to Control Room Wall,Per LER 83-06.Temporary Flexible Ducting in Place During Mods. Mods Completed.Ventilation Sys Returned to Svc (← links)
- 05000220/LER-1983-006-03, /03L-0:on 830411,while Performing Design Review, Discovered That Poured Concrete North & West Walls of Control Room Would Not Meet Original Seismic Criteria. Mods Made to Improve Wall Structural Loading Capabilities (← links)
- 05000220/LER-1981-053-03, /03L-1:on 811120,discovered That Single Failure of Electrical Power Supply Could Either Isolate Both Condenser Sys or Cause Failure to Isolate.Logic for Initiation & Isolation of Condenser Sys Reviewed (← links)
- 05000220/LER-1981-053, Forwards LER 81-053/03L-1 (← links)
- 05000220/LER-1981-046-04, /04T-0:on 810922,review of 810813 & 14 ETS Semiannual Samples of Cladophora Showed Co-60 & Nb-95 at Level of 10 Times Control Value.Probably Caused by Liquid Effluent Discharge & Oct 1980 Chinese Weapons Test (← links)
- 05000220/LER-1981-046, Forwards LER 81-046/04T-0 (← links)
- 05000220/LER-1981-042-04, /04T-0:on 810831,during Weekly Environ Radiation Monitor Insp,Only Six Monitors Found Functioning Due to Defective Power Supply Units.Cause Unknown.Portable Monitor Installed (← links)
- 05000220/LER-1981-042, Forwards LER 81-042/04T-0 (← links)
- 05000220/LER-1981-040-03, /03L-0:on 810818,chromated Water Found in Diesel Generator 102 Raw Water Due to Water Leaking Through Heat Exchangers.Cause Unknown.Raw Water Lines Drained & All Chromate Recovered (← links)
- 05000220/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000220/LER-1981-036-01, /01T-0:on 810729,during Followup Investigation of Ler,Technician Bypassed Sys 11 & 12 High Radiation & Emergency Condenser High Steam Flow Isolation Function, Violating Tech Spec.Caused by Failure to Follow Procedure (← links)
- 05000220/LER-1981-036, Forwards LER 81-036/01T-0 (← links)
- 05000220/LER-1981-032-03, /03L-0:on 810705,during Normal Operation,Automatic Reactor Scram Occurred on Low Reactor Water Level.Caused by Time Delay Due to Malfunctioning HPCI Controller.Controller Replaced & New Controller Tested Properly (← links)
- 05000220/LER-1981-032, Forwards LER 81-032/03L-0 (← links)
- 05000220/LER-1981-031-03, /03L-0:on 810704,during Startup W/Reactor at Low Pressure,Emergency Condenser Loop 11 Was Removed from Svc Because of Water Hammer.Caused by Inadequate Draining of Emergency Condenser Sys.Loop Cooled Down & Isolated (← links)
- 05000220/LER-1981-031, Forwards LER 81-031/03L-0 (← links)
- 05000220/LER-1981-030-03, /03L-0:on 810630,all Emergency Condenser Vent Monitors Exceeded Upscale Trip Setpoint During Calibr. Caused by Difference in Response Between Test Signal & Actual Signal.Procedure Revised (← links)
- 05000220/LER-1981-030, Forwards LER 81-030/03L-0 (← links)
- 05000220/LER-1981-024-03, /03L-0:on 810615,containment Oxygen Sampling Isolation Valve 201.2-23 Failed to Meet Acceptance Criteria of N1-1SP-25.6 During Local Leak Rate Testing.Caused by Dirt Under Seat.Valve Bonnet Removed & Body & Seat Cleaned (← links)
- 05000220/LER-1981-024, Forwards LER 81-024/03L-0 (← links)
- 05000220/LER-1981-022-03, /03L-0:on 810603,during Refueling Outage,While Performing Local Leak Rate Testing,Reactor Bldg to Torus Vacuum Breaker Valve 68-09 Failed to Meet Tech Spec Requirements.Caused by Worn Seating & Packing Matls (← links)
- 05000220/LER-1981-020-03, /03L-0:on 810605,during Refueling Outage,Check Valves X-81R & X-71E Failed When Tested.Caused by Improper Seating of Valves During Test Procedure.Valves Replaced & Tested Successfully (← links)
- 05000220/LER-1981-023, Forwards LERs 81-022/03L-0,81-020/03L-0 & 81-023/03L.W/o LER 81-023/03L-0 (← links)
- 05000220/LER-1981-023-03, /03L-0:on 810603,while Performing Local Leak Rate Testing,During Refueling Outage,Torus Vacuum Breaker Valve 68-08 Failed to Meet Tech Spec Requirements.Caused by Worn Seating & Packing Matl.Rubber Goods Replaced (← links)
- 05000220/LER-2019-004, Average Power Range Monitors Declared Inoperable (← links)
- 05000220/LER-1983-013-03, /03L-0:on 830610,during Routine Surveillance,Lock Found Missing from Outside Inlet Valve 40-12 for Core Spray Sys.Valve & Breaker in Open Position.Lock Missing for No More than 15 Days.Lock Replaced (← links)
- 05000220/LER-1978-035-01, /01T-0 on 781020:all Main Steam High Flow Pressure Indicating Instr Were Found W/Setpoints Less than Tech Specs.Heise 0-200 PSIG Test Gauge Calibrated & Used in Test Had Loose Screw & Was Recalibrated (← links)
- 05000220/LER-2019-003-01, Manual Reactor Scram Due to Pressure and-Power Oscillations (← links)
- 05000220/LER-2019-001-01, Automatic Reactor Scram Due to High Reactor Pressure (← links)
- 05000220/LER-1979-079, Forwards LER 79-079/03L-0 (← links)
- 05000220/LER-2019-003, Manual Reactor Scram Due to Pressure and Power Oscillations (← links)
- 05000220/LER-2019-002, Condition Prohibited by Technical Specification Due to Vacuum Breaker Not Locked Closed (← links)
- 05000220/LER-2019-001, Automatic Reactor Scram Due to High Reactor Pressure (← links)
- 05000220/LER-2078-003-03, Re Surveillance Test Found Main Steam High Flow Switch with Setpoint of 107.5 PSI (← links)
- 05000220/LER-2078-001, Re Delta Temperature of Discharge Water Exceeded Specification 2.1.5 of Environmental Tech Specs (← links)
- 05000220/LER-1987-023-01, :on 870422,trip of Normal Reactor Bldg Ventilation & Initiation of Emergency Ventilation Occurred. Caused by Personnel Error.Fuse Replaced.On 871123,util Discovered LER Not Submitted for Event (← links)
- 05000220/LER-1981-006-03, /03L-0:on 810207,during Fire Sys Preventive Maint Test,Electric Fire Pump Failed to Start.Caused by Broken Prop Spring in 4160V Motor Breaker.Spring Replaced & Pump Returned to Svc (← links)
- 05000220/LER-1981-005-04, /04L-0:on 810202,plant Discharge Temp Vs Plant Inlet Temp Tech Spec Was Exceeded for 52-h During Circulating Water Reverse Flow Operation.Cause Not Stated. Checklist to Be Revised to Prevent Future Occurrence (← links)
- 05000220/LER-1981-007-03, /03L-0:on 810202,during Weekly Surveillance,Diesel Fire Pump Oil Leak Was Identified.Caused by Leak in Coupling to Tubing Weld Joint.Joint Removed,Rebrazed & Returned to Svc (← links)
- 05000220/LER-1990-006-01, :on 891027,discovered Unverified Assumption in App R Safe Shutdown Analysis.Caused by Fire Protection Program Failure to Provide Detailed Procedural Instructions for Operator Actions.New Procedures Developed (← links)
- 05000220/LER-1981-003, Has Been Cancelled (← links)
- 05000220/LER-1981-002, Has Been Cancelled (← links)
- 05000220/LER-1981-004-01, /01T-0:on 810209,main Steam Radiation Monitor 111 Signal Fluctuated,Causing Multiple Half Scrams.Caused by Loose detector-to-cable Connector.Connector Tightened (← links)
- 05000220/LER-1981-001-03, /03L:on 810107,emergency Diesel Generator Output Breaker Tripped on Excessive Current.Caused by Failure of Generator Voltage Regulator Due to Protective Fuse Blow (← links)
- 05000220/LER-1980-032-03, /03L-0:on 801216,one Filter Bank in Branch 11 of Emergency Ventilation Sys Found Leaking in Excess of Tech Spec.Caused by Defective Filter Sealing Gasket.New Filter Unit Installed (← links)
- 05000220/LER-1980-033-03, /03L-0:on 801224,auxiliary Power Feed Experienced Loss to Emergency Power Bus.Caused by Feeder Breaker Trip Due to Setpoint on Over Frequency Protective Relay Being Set Too Close to Nominal Frequency.Relay Recalibr (← links)
- 05000220/LER-1980-034-03, /03L-0:on 801229,one Fuel Handling & One Instrument Surveillance Procedure Not Sorc Reviewed within 7-day Tech Spec Requirement.Caused by Oversight of Due Date. Review Performed (← links)
- 05000220/LER-1980-030-04, /04T-0:on 801204,discovered That Lower Limit of Detection for Radiological Fish Analysis Was Not within Ets. Caused by Conversion Factor.Tech Spec Changes Proposed to Update Parameter (← links)
- 05000220/LER-1980-031-01, /01T-0:on 801216,feedwater Flow Control Valve Pneumatic Positioner Unit II Vented Excessive Amount of Air. Caused by Cracked & Worn Rubber Goods.Rubber Goods Replaced & Retested (← links)
- 05000220/LER-1980-028-04, /04T-0:on 801215,results of 801103,26 & 1201 Milk Sample Tests Showed Detectable I-131 at Three Locations. Caused by Chinese Nuclear Weapons Test During Oct.Plant Not Accountable for Detected Levels (← links)
- 05000220/LER-1980-027-03, /03L-0:on 801126,operability Tests Were Not Immediately Performed as Required.Caused by Misunderstanding of Intent of Procedure.Testing Performed (← links)
- 05000220/LER-1980-025-03, /03L-0:on 801028,stack Gas Monitoring Sys Rendered Inoperable When Inadvertently Left in Purge Operation Mode for 9.5-h.Caused by Technician Failing to Return Sys to Normal Operation.Monitor Returned to Operation (← links)
- 05000220/LER-1980-026-01, /01T-0:on 801118,input Error Discovered Which Resulted in Reduction in Calculated Pressure Margin to Reactor Safety Valve Setpoints During Possible Transients (← links)
- 05000220/LER-1980-018-03, /03L-0:on 800808,during Normal Operation, Emergency Diesel Generator 103 Fuel Oil Day Tank Low Level Alarm Was Received.Caused by Inadvertent Opening of Day Tank Drain Valve.Tank Refilled.Oil Valve Sys Locked (← links)
- 05000220/LER-1980-024-03, /03L-0:on 800930,during Audit,Discovered That Point Valve Was Not Recorded on 790721 Instrument Surveillance Test for Drywell High Pressure Trip Sys.Caused by Personnel oversight.Two-level Review Instituted (← links)
- 05000220/LER-1980-022-03, /03L-0:on 800927,low Power Range Monitor Detector Failed Rendering Average Power Range Monitor 18 Inoperable. Caused by Internal Shorting.Low Power Range Monitor Will Be Replaced During Next Refueling (← links)
- 05000220/LER-1980-023-03, /03L-0:on 800922,111 Absolute Filter Access Cover Was Found Off Housing.Caused by Residual Pressure in Containment Nitrogen Inerting Line Pressurizing Filter Housing When Torus Venting Initiated.Cover Reinstalled (← links)
- 05000220/LER-1980-020-03, /03L-0:on 800830,while Experiencing Electrical Storm During Normal Operation,Loss of Meteorological Data Transmission to Control Room Instruments Occurred.Caused by Transceiver Failure.Transceiver Repaired & Returned to Svc (← links)
- 05000220/LER-1980-019-04, /04T-0:on 800827,during NRC Insp at Normal Operation,Discovered Removable Bottom Door Seals of Outer Door of Reactor Bldg Track Bay Were Not Installed Properly. Caused by Personnel Error (← links)
- 05000220/LER-1980-019, Forwards LER 80-019/04T-0 (← links)
- 05000220/LER-1980-015-04, /04L-0:on 800804,during Steady State Operation, Offgas Monitoring Sys Inadvertently Placed in Purge Mode of Operation.Caused by Technician Error.Sys Returned to Normal Operating Mode,Restoring Sys Operability (← links)
- 05000220/LER-1980-014-03, /03L-0:on 800717,during start-up Performance for IE Bulletin 80-17 Auto Scram Test,Operability Test Attempted on Valve During Shutdown Period.Valve Failed to Open Upon Manual Initiation.Valve Removed & Disassembled (← links)
- 05000220/LER-1980-012-03, /03L-0:on 800419,during Surveillance Testing of Turbine Anticipatory Trip Bypass,Rx Scram Switch 02-13A Was Operating Outside Setpoint.Caused by Instrument Drift.Switch Readjusted & Will Be Tested Monthly (← links)
- 05000220/LER-1980-011-04, /04L-0:on 800623,recorder Review Showed Condenser Inlet/Circulating Water Discharge Delta Temp Had Exceeded Tech Spec Limit on 800620-23.Station Load Reduced,Recorder Scale Expanded & Tech Spec Change Initiated (← links)
- 05000220/LER-1980-009-03, /03L-0:on 800521,during Steady State Operation, Attempts to Stroke 122 Containment Spray Isolation Valve Failed.Caused by Isolation Valve Solenoids Being Dirty. Revising Procedures to Require Periodic Maint for Valve (← links)
- 05000220/LER-1980-010-03, /03L-0:on 800528,while Performing Valve Checks, Operator Discovered Cardox Tank Pressure Below Tech Spec Limits.Caused by Delivery of Too Low Temp Carbon Dioxide by Supplier.Low Pressure Alarm Connected (← links)
- 05000220/LER-1980-008-03, /03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts (← links)
- 05000220/LER-1980-007-03, /03L-0:on 800303,while Shutdown for Maint,Attempts to Close Both Air Operated Outside Main Steam Isolation Valves Failed.Caused by Rust Buildup in Pilot Shuttle.New Instrument Air Sys Is Being Installed (← links)
- 05000220/LER-1980-006-04, /04L-0:on 800123-24,condensor Inlet/Circulating Water Discharge Temp Exceeded Tech Spec Limit.Following Flow Reversal,Discharge Temp Exceeded Lake Ambient by More than Tech Spec Limit.Caused by Instrument Failure (← links)
- 05000220/LER-1980-005-01, /01X-0:on 800203,engineering Evaluation of GE SIL 299 Required That low-low Setpoint for Reactor Core Water Level Be Raised 20 Inches.Caused by Efforts to Precisely Measure Actual to Indicated Water Level Difference (← links)
- 05000220/LER-1980-003-01, /01T-0:on 800109,lab Analysis Not Performed on Charcoal Filter Samples from Rx Bldg & Control Room Emergency Ventilation Sys Per Tech Specs.Caused by Change in Operating Cycle Length.Will Revise Surveillance Schedule (← links)
- 05000220/LER-1980-001-03, /03L-0:on 800102,during Steady State Operation, Calculations Determined Planar Linear Heat Generation Rate Exceeded Tech Specs.Cause Unknown.Power Decreased. Calculation Revealed Heating Generation Rate within Limits (← links)
- 05000220/LER-1980-002-04, /04L-0:on 800109,during Steady State Operation, Review of Differential Recorder Revealed Condenser Inlet/ Screenwell Discharge Differential Temp Went Over Established Limits.Caused by Instrument Malfunction (← links)
- 05000220/LER-1979-025-03, /03L-0:on 791027,during Surveillance Testing, Personnel Unable to Zero Side Average Power Range Monitor Flow Converter 11.Caused by Component Failure.Entire Unit Replaced & Problem Eliminated (← links)
- 05000220/LER-1979-023-03, /03L-0:on 791004,cooling Water Pump of Diesel Generator 103 Tripped.Caused by Burned Contacts in Breaker. Breaker Repaired & Pump Started Manually.Preventative Maint Procedure Will Be Revised (← links)
- 05000220/LER-1979-022-01, /01T-0:on 790918,noted Failure to Install Seismic Constraint on Containment Spray Sys Outside Primary Containment Per Const Drawings.Initiated Design & Order to Install Constraint.Containment Spray Loop Inoperable (← links)
- 05000220/LER-1979-013-03, /03L-1:on 790525,during Refuelling Outage,Three Instrument Surveillance Procedures Were Implemented Before Required Temporary procedure-change Signatures Were Obtained.Cause Not Stated (← links)
- 05000220/LER-1979-020-03, /03L-0:on 790901,during Steady State Operation, Drywell Cooler 14 Tripped & Leakage Increased to Above Five G/Minute.Caused by Cooler Tube Leak.Cooler Isolated & Returned to Acceptable Level.Shutdown Terminated (← links)
- 05000220/LER-1979-019-03, /03L-0:on 790816,during Steady State Operation, Routine Mgt Review Disclosed Failure to Complete Five Surveillance Tests on Schedule.Tests Immediately Performed & Completed.Personnel Instructed to Follow Published Schedule (← links)
- 05000220/LER-1979-021-04, /04T-0:on 790905,noted That Analysis of Excesssive Nuclide Water Sample Concentrations Was Not Completed within 30 Days.Caused by Late Rept by Contractor & High Influx of Samples.Addl Personnel Added (← links)
- 05000220/LER-1979-018-03, /03L-0 on 790726:vacuum Relief Sys Switch 68-12B Failed to Open at Proper Setpoint.No Cause Identified.Switch Adjusted to Proper Setpoint (← links)
- 05000220/LER-1979-017-03, /03L-0 on 790612:containment Spray Water Intertie Valves Leaked Causing Failure of Integrated Leak Rate Test. Valves Removed,Cleaned & re-installed (← links)
- 05000220/LER-1979-016-03, /03L-0 on 790626:failure to Review Temporary Electrical Maint Procedure within Seven Days.Review Made & Approvals Received (← links)
- 05000220/LER-1979-016, Forwards LER 79-016/03L-0 & LER 79-017/03L-0 (← links)
- 05000220/LER-1979-011-03, /03L-0 on 790517:during Refueling Outage, Discovered That Radiographer Received Overexposure of 3,790 Millirems for Second Quarter 1979.Cause Unknown & Under Investigation.Discussed Further in to NRC (← links)
- 05000220/LER-1979-014-03, /03L-0 on 790319:during Refueling Outage,Core Spray Sys Snubber 40-HS-10 Found Inoperable.Caused by Worn Piston Seals on Core Spray Snubber Resulting in Loss of Fluid from Snubber.Seals Replaced & Snubber Reinstalled (← links)
- 05000220/LER-1979-012-01, /01T-0 on 790523:concrete Anchor Bolt Deficiencies & Missing Seismic Restraints Were Discovered on Class I Seismic Piping Sys.Caused by Incorrect Installation.Concrete Anchor Bolt Repair Program Will Be Completed by 791231 (← links)
- 05000220/LER-1979-009-03, /03L-0 on 790510:during Refueling Outage,Site Operations Review Committee Failed to Review Temporary Change to Maint Procedure N1-MP-7.11 within 7-day Limit. Change Subsequently Reviewed (← links)
- 05000220/LER-1979-008-03, /03L-0 on 790510:during Refueling Outage, Containment Spray Heat Exchangers 112 & 121 Failed Leak Rate Test.Caused by Tube Leaks.Tubes Plugged (← links)
- 05000220/LER-1979-010-03, /03L-0 on 790424:during Refueling Outage, Containment Vacuum Relief Valve 68 IV-10 Flange Failed Leak Rate test.O-rings Replaced on Flange (← links)
- 05000220/LER-1979-005-03, /03L-0 on 790401:during Periodic Type C Leakage Test,Valves IV-68-06,IV-201-09,IV-201-10 & IV-58.1-02 Were Found to Be in Excess of Tech Specs.Cause Unknown.Repairs Will Be Made During Outage (← links)
- 05000220/LER-1979-002-01, /01X-1 on 790306:during Refueling Outage While Preparing Emergency Condenser Steam Nozzle 5-NB for Replacement of safe-end,discovered Inconel Weld Was Removed from Nozzle.New Safe End Installed (← links)
- 05000220/LER-1979-001-03, /03L-0 on 790218:during Performance of Surveillance,Test Flow Comparator 11 Did Not Produce Rod Block within Required Tolerance.Caused by Defective Rod Comparator.Component Replaced & Setpoint Left at 14% (← links)
- 05000220/LER-1978-041-04, /04T-0 on 781220:during Impingement Sampling Only 23 Samples (22 Hourly Samples & One 2-hr Sample) Were Collected Instead of 24 Required Samples,Caused by one-time Personnel Scheduling Change (← links)
- 05000220/LER-1978-040-03, /03L-0 on 781113: 112 Core Spray Topping Pump Motor Breaker Closed Starting Pump But Breaker Closing Spring Motor Was Running Continuously & Not Charging Closing Spring.Caused by Misaligned Motor Assembly at Latching Pawl (← links)
- 05000220/LER-1978-001, Submittal of Licensee Event Report LER 78-01 Concerning Delta Temperature of the Discharge Water Exceeded Environmental Tech. Spec (← links)
- 05000220/LER-1978-005, And LER 78-005-00 for Nine Mile Point, Unit 1 Re During Unit Shutdown, Reserve Power Breaker on Power Board II Failed to Close in After Loss of Normal Power and During Plant Outage While Marking Up Outside MSIV 01-03 Discovered (← links)
- 05000220/LER-1978-006, Re During Steady State Operation, Performance of Surveillance Test IC-75 Found a Trip Setpoint of 22.5 Inches Water on One Vacuum Switch in the Vacuum Relief System from the Pressure Suppression Chamber to the (← links)
- 05000220/LER-1978-009, And LER 78-010-00 for Nine Mile Point, Unit 1 Re Technical Specification Violations of Listed Sections (← links)
- 05000220/LER-1978-013, And LER 78-013-00 for Nine Mile Point, Unit 1 Re Technical Specification Violations of Section 3.6.2 (← links)
- 05000220/LER-1978-015, And LER 78-015-00 for Nine Mile Point Unit 1 Regarding, Respectively, Discovery That the Fuel Transfer Pump in 102 D/G Would Not Fill the Day Tank and Discovery That 12 Control Room Air Treatment Fan Would Not Run (← links)
- 05000220/LER-1978-014, LERs 78-014,00, 78-016-00, and 78-016-00 for Nine Mile Point Unit 1 Regarding, Respectively, Discovery That the Fuel Transfer Pump on 102 D/G Would Not Fill the Day Tank, Discovery of RE18C with a Setpoint of 129 Inches Wc, and (← links)
- 05000220/LER-1978-018, For Nine Mile Point Unit 1 Regarding Discovery of Main Steam High Flow Switch with a Setpoint of 106.2 PSI, Which Is Above the Technical Specification (← links)
- 05000220/LER-1978-019, For Nine Mile Point Unit 1 Regarding Discovery That Hydraulic Snubber 31-HS-1 Had Failed and Was Empty of Hydraulic Fluid and Disconnected from Its Anchor at the Feedwater Pipe (← links)
- 05000220/LER-1978-009-01, For Nine Mile Point Unit 1 Regarding Replacement of Explosive Charges in the TIP Shear Valves with New Charges and the Resulting Unsatisfactory Ohmmeter Continuity Test for Acceptable Electric Contact (← links)
- 05000220/LER-1978-020, LERs 78-020-00, 78-021-00, 78-022-00, and 78-023-00 for Nine Mile Point Unit 1 Regarding, Respectively, Discovery of RE18A with a Setpoint of 135 Inches Wc, Discovery of RE04A and RE04B with a Setpoint of 3.65 PSIG, Discovery o (← links)
- 05000220/LER-1978-024, For Nine Mile Point Unit 1 Regarding Discovery That Test N1-St-Q2,4,5,7,8,9, and 10 Had Not Been Performed During a Review of Quarterly Surveillance Test Results (← links)
- 05000220/LER-1978-025, LERs 78-025-00, 78-026-00, and 78-027-00 for Nine Mile Point Unit 1 Regarding, Respectively, Discovery of RE04D with a Setpoint of 3.70 PSIG, Discovery of Numerous Small Leaks in Small Sample and Instrument Pipes, and Discovery (← links)
- 05000220/LER-1978-028, For Nine Mile Point Unit 1 Regarding Discovery of the Allowable Test Interval of TS 4.1.4c for the Core Spray Power-Operated Valves Had Been Exceeded (← links)
- 05000220/LER-1978-029, Regarding Discovery of High Drywell Pressure Switches RE04A, RE04B, and RE04C with Setpoints Less Conservative than the Technical Specifications (← links)
- 05000220/LER-1978-030, 78-031-00, and 78-032-00 for Nine Mile Point Unit 1 Regarding, Respectively, Unavailability of Feedwater Pump 29-03 While Its Pump Seals Were Replaced, Unavailability of Liquid Poison Pump NP02A While a Frozen Valve (← links)
- 05000220/LER-1978-034, Regarding an Environmental Contractor Obtaining 22 Hourly Fish Impingement Samples, and One Two-Hour Sample, Which Is Contrary to the Technical Specification Requiring 24 Hourly Samples (← links)
- 05000220/LER-1977-012, And LER 77-012-00 for Nine Mile Point Unit 1 Regarding Discovery of Discharge Pressure Switch in 12 Feedwater Pump Discharge Failed in the Closed Position and Regarding Discovery of Contacts on Relay for MSIV Isolation (← links)
- 05000220/LER-1977-020, And LER 77-020-00 for Nine Mile Point Unit 1 Regarding Discovery of Two Containment Oxygen Sampling System Check Valves Indicating Leakage in Excess of Single Valve Technical Specifications (← links)
- 05000220/LER-1977-022, For Nine Mile Point Unit 1 Regarding Discovery of Linear Indications on Three Collet Retainer Tubes in Drive Mechanisms Removed from the Reactor Vessel (← links)
- 05000220/LER-1977-021, Regarding Discovery of Sodium Valve for Liquid Effluents Exceeded the Limit of 1.5 Pmm and LER 77-021-00 Relating to the Stack Sample Pump Being Out of Service for 9 Hours 20 Minutes Due to (← links)
- 05000220/LER-1977-027, For Nine Mile Point Unit 1 Regarding Discovery of an Unacceptable Linear PT Indication in the Pipe at the Safe End to Pipe Weld Joint (← links)
- 05000220/LER-1977-028, For Nine Mile Point Unit 1 Regarding Failure of a Reactor Low Water Level Instrument to Trip When Tested (← links)
- 05000220/LER-1977-029, 77-030-00, 77-031-00, 77-034-00, & 77-035-00 for Nine Mile Point Unit 1 Low-Low-Low Level Set Point Out of Specs on RE-18A, Vacuum Switch Trip & Reset Point on Torus Relief Valves Out of Specs, Weld Leak in Emergency Condenser (← links)
- 05000220/LER-1977-032, For Nine Mile Point Unit 1 Regarding a Water Phase Material Sample in the Reactor Vessel Inspection Lapse During Refueling (← links)
- 05000220/LER-1978-003, Regarding Drywell High Pressure Switch RE04A Setpoint Drift and LER 78-003-00 (← links)
- 05000220/LER-1982-011-03, /03L-0:on 820802,oil Leak on Fuel Oil Supply Manifold Discovered on Diesel Fire Pump.Caused by Defective Braze Joint.Leak Repaired by Manufacturer (← links)
- 05000220/LER-1917-003, Regarding Automatic Reactor Scram Due to Reactor Vessel Low Water Level (← links)
- 05000220/LER-1917-002, Regarding Manual Reactor Scram Due to Pressure Oscillations (← links)
- 05000220/LER-1994-003-01, :on 940406,missed Tech Spec Surveillance Discovered.Caused by Inadequate Management.Correcting Preventive maint-surveillance Test Database (← links)
- 05000220/LER-1982-019-03, /03L-0:on 821213,while Performing Local Leak Rate Testing,Leakage from Valves 201-09,201-10,201-31 & 201-32 Exceeded Tech Specs.Caused by Poor Seal Design.Vendor Mod Available & Will Be Completed During Current Outage (← links)
- 05000220/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000220/LER-1981-005, Forwards LER 81-005/04L-0 (← links)
- 05000220/LER-1981-007, Forwards LER 81-007/03L-0 (← links)
- 05000220/LER-1981-004, Forwards LER 81-004/01T-0 (← links)
- 05000220/LER-1981-001, Forwards LER 81-001/03L-0 (← links)
- 05000220/LER-1980-032, Forwards LER 80-032/03L-0 (← links)
- 05000220/LER-1980-033, Forwards LER 80-033/03L-0 (← links)
- 05000220/LER-1980-030, Forwards LER 80-030/04T-0 (← links)
- 05000220/LER-1980-031, Forwards LER 80-031/01T-0 (← links)
- 05000220/LER-1980-028, Forwards LER 80-028/04T-0 (← links)
- 05000220/LER-1980-027, Forwards LER 80-027/03L-0 (← links)
- 05000220/LER-1980-025, Forwards LER 80-025/03L-0 (← links)
- 05000220/LER-1980-026, Forwards LER 80-026/01T-0 (← links)
- 05000220/LER-1980-024, Forwards LER 80-024/03L-0 (← links)
- 05000220/LER-1980-022, Forwards LER 80-022/03L-0 (← links)
- 05000220/LER-1980-023, Forwards LER 80-023/03L-0 (← links)
- 05000220/LER-1980-020, Forwards LER 80-020/03L-0 (← links)
- 05000220/LER-1980-018, Forwards LER 80-018/03L-0 (← links)
- 05000220/LER-1980-015, Forwards LER 80-015/04L-0 (← links)
- 05000220/LER-1980-014, Forwards LER 80-014/03L-0 (← links)
- 05000220/LER-1980-012, Forwards LER 80-012/03L-0 (← links)
- 05000220/LER-1980-011, Forwards LER 80-011/04L-0 (← links)
- 05000220/LER-1980-009, Forwards LER 80-009/03L-0 (← links)
- 05000220/LER-1980-010, Forwards LER 80-010/03L-0 (← links)
- 05000220/LER-1980-008, Forwards LER 80-008/03L-0 (← links)
- 05000220/LER-1980-007, Forwards LER 80-007/03L-0 (← links)
- 05000410/LER-2020-001, Manual Scram Due to an Electro Hydraulic Control Fluid Leak on the Turbine Control System (← links)
- 05000410/LER-2020-002, Failure to Meet Technical Specification MSIV Stroke Times (← links)