Pages that link to "05000382/LER-2021-001, Re Loss of Offsite Power Due to Hurricane Ida"
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The following pages link to 05000382/LER-2021-001, Re Loss of Offsite Power Due to Hurricane Ida:
Displayed 2 items.
- ML21301A192 (redirect page) (← links)
- 05000382/LER-2021-001 (redirect page) (← links)
- 05000382/LER-2014-003 (← links)
- 05000382/LER-2001-005 (← links)
- 05000382/LER-2001-004 (← links)
- 05000382/LER-2001-002 (← links)
- 05000382/LER-2001-001 (← links)
- 05000382/LER-1985-006, Discusses 850220 Inadvertent Containment Spray Actuation & Subsequent Evaluation in Light of Reactor Coolant Pump Seal Degradation (Ref LER-85-006).Insp Shows,Despite Seal Degradation,Vapor Seal Integrity Maintained (← links)
- 05000382/LER-1996-013, Advises That LER 96-013-00 Cancelled Based on Root Cause Analysis Results Concluding That Facility Did Not Operate in Excess of 100% Licensed Reactor Power (← links)
- 05000382/LER-1999-005, Forwards LER 99-005-00,providing Details of Discovery of Untested Electrical Contacts in safety-related Logic Circuits (← links)
- 05000382/LER-1999-002, Forwards LER 99-002-00 Re Leaks Discovered on Instrument Nozzles in Rcs.Event Being Reported Per 10CFR50.73(a)(2)(ii) & 10CFR50.73(a)(2)(i)(B) (← links)
- 05000382/LER-1999-004, Forwards LER 99-004-00 Re Discovery That Response Time Testing Had Not Been Performed for ESFAS Containment Cooling Function,As Required by TS SR 4.3.2.3 (← links)
- 05000382/LER-1998-001, Forwards LER 98-001-00,providing Details of TS 3.0.3 Condition Experienced During Plant Malfunction When LCO Section 3.1.2.4 Was Not Met (← links)
- 05000382/LER-1985-057, Forwards LER 85-057-00.Event Analysis & Reporting Group Established to Improve Plant Safety & Reliability & Ensure That Causes of Significant Events Identified & Corrected,As of Sept 1986 (← links)
- 05000382/LER-1999-007, Forwards LER 99-007-00,providing Details of Operation Outside Tornado Missile Protection Licensing Basis for turbine-driven Emergency Feedwater Pump Exhaust Stack & Steam Supply Piping.All Commitments Identified on Attached (← links)
- 05000382/LER-1999-011, Forwards LER 99-011-00,providing Details of Reactor Shutdown Due to Loss of Controlled bleed-off Flow.All Commitments Contained in Submittal Identified on Attached Commitment Identification/Voluntary Enhancement Form (← links)
- IR 05000382/2021003 (← links)
- 05000382/LER-1999-010, Forwards LER 99-010-00,providing Details of Inadequate Pumping Capacity in Dry Cooling Tower Area.All Commitments Contained in Submittal Are Identified on Attached Commitment Identification Voluntary Enhancement Form (← links)
- 05000382/LER-1999-009, Forwards LER 99-009-00 Re Discovery of Condition of Noncompliance with App R Involving Inadequate Separation of Essential Cables Routed in Fire Area RAB-30 in Rab. Compensatory Measures Were Established Immediately (← links)
- 05000382/LER-1999-008, Forwards LER 99-008-00,re Failure to Perform Testing of ESF Filtration Units Per TS Srs.Commitments Made by Util Also Encl (← links)
- 05000382/LER-2024-004, Automatic Reactor Trip Due to Lightning Strike (← links)
- 05000382/LER-2024-003, Automatic EFAS Actuation During Surveillance Test (← links)
- 05000382/LER-2024-002, Automatic Reactor Trip Due to Transformer Failure (← links)
- 05000382/LER-2024-001, Manual Reactor Trip Due to Engineered Safety Features Actuation System Relay Failure (← links)
- 05000382/LER-2023-004, Non-Compliance with Technical Specifications Due to Performing Startup Channel 1 Functional Testing During Fuel Movement (← links)
- 05000382/LER-2023-003, Steam Generator Tube Degradation Indicated by Failed In-Situ Pressure Testing (← links)
- 05000382/LER-2023-002, Plant Shutdown Required by Technical Specifications for Unidentified Reactor Coolant System Leakage in Containment (← links)
- 05000382/LER-2023-001, Non-Compliance with Technical Specifications Due to pico-ammeter Circuit Board Fluctuations in Containment High Range Radiation Monitor B (← links)
- 05000382/LER-2022-001-02, Non-Compliance with Technical Specifications Due to Incorrect Procedural Guidance for Radiation Monitors (← links)
- 05000382/LER-2022-001-01, On Non-Compliance with Technical Specifications Due to Incorrect Procedural Guidance for Radiation Monitors (← links)
- 05000382/LER-2022-005, Engineered Safety Features Actuation System Relay Failure Results in Reactor Trip and Emergency Feedwater Actuation (← links)
- 05000382/LER-2022-006, Non-Compliance with Technical Specifications Due to Incorrect Conversion Factors in Plant Stack and Fuel Handling Building Radiation Monitors (← links)
- 05000382/LER-2022-004, Regarding Operation Prohibited by Technical Specifications Due to Inadequate Radiation Monitor Calibration Procedures (← links)
- 05000382/LER-2022-003, Operation Prohibited by Technical Specifications Due to Radiation Monitor Calibration Error (← links)
- 05000382/LER-2022-002, Operation Prohibited by Technical Specifications Due to Personnel Error (← links)
- 05000382/LER-2022-001, Non-Compliance with Technical Specifications Due to Incorrect Conversion Factors in Three Gaseous Radiation Monitors (← links)
- 05000382/LER-2021-003, Non-Compliance with Technical Specifications Due to Failed Ambient Pressure Input (← links)
- 05000382/LER-2021-002, Loss of Offsite Power Due to Hurricane Ida (← links)
- 05000382/LER-2021-001, Re Loss of Offsite Power Due to Hurricane Ida (← links)
- 05000382/LER-2024-001-01, Manual Reactor Trip Due to Engineered Safety Features Actuation System Relay Failure (← links)
- ML21053A128 (redirect page) (← links)
- 05000382/LER-2021-001, Control Room Air Filtration Equipment Failure Resulting in a Condition Prohibited by Technical Specification 3.7.6.1 (redirect page) (← links)
- 05000382/LER-2020-003, Procedure Deficiency for MG Set Voltage Regulator Installation Results in a Reactor Trip (← links)
- 05000382/LER-2020-002, (Waterford 3), Operation or Condition Prohibited by Technical Specifications for Technical Specification 3.4.5.1 (Reactor Coolant System Leakage Detection Instrumentation) Due to Personnel (← links)
- 05000382/LER-1997-030, :on 971114,discovered TS 3.6.3 Noncompliance Due to Design Error Associates W/Cars & Civs.Caused by Inadequate Mod.Valve CAR-201B Declared Inoperable (← links)
- 05000382/LER-1997-030-01, Forwards LER 97-030-01,which Documents Condition Wherein Normally Closed Inside & Outside Ci Valves for Containment Atmosphere Release Sys Were Subject to Single Failure Which Could Result in Failure of Isolation Valves to C (← links)
- 05000382/LER-1998-010, :on 980514,potential Overpressurization of N Sys Was Noted.Caused by Inadequate Design.N Sys Lineup Changed to Allow for Addl Overpressure Protection Through Alternate Existing ASME Section Viii Relief Valve (← links)
- 05000382/LER-1997-027, :on 971110,discovered Controller for Accws Valve Was Left in Manual.Caused by Personnel Error.Event Debriefing W/Control Room Staff (← links)
- 05000382/LER-1997-027-01, Forwards LER 97-027-01,providing Updated Info Re Reportable Condition for Accws (← links)
- 05000382/LER-1998-001-01, :on 980214,TSs 3.0.3 Condition Occurred Due to Inoperable Charging Pumps.Replaced Failed SX-1 Relay (← links)
- 05000382/LER-1989-009, :on 890504,discovered Discrepancy W/Steam Generator Eddy Current Test Results from Second Refuel Outage.Caused by Personnel Error & Inadequate Administrative Controls.Selection Process Will Be Revised (← links)
- 05000382/LER-1988-030, :Since 881110,number of Discrepancies Have Been Identified in fire-rated Assemblies at Plant.Cause of Events Appears to Be Inadequate Fire Seal Installation & Insp Program During Initial Plant Const (← links)
- 05000382/LER-1989-008, :on 890426,emergency Diesel Generator Fuel Oil Not Being Sampled,Per ASTM Specified Methods.Caused by Inadequate Procedure as to Tech Spec Requirements.Sampling Procedure Revised to Conform w/ASTM-D270 (← links)
- 05000382/LER-1989-017, :on 890819,automatic Reactor Trip of Unit Occurred While Operating at 23% Power.Caused by Equipment Malfunction.Repairs Made to Control Element Assembly Circuitry (← links)
- 05000382/LER-1998-008, :on 980414,potential Concurrent Degraded Ecw Sys Trains a & B Was Noted.Cause Was Indeterminate. Affected Circuits Have Been Corrected (within Design Parameters) to Address Condition (← links)
- 05000382/LER-1998-009, :on 980415,inadvertent ESF Actuation Occurred. Caused by Inadequate Configuration Control.Restored Incorrectly Lifted Lead to Terminal Point & Made Maint Personnel Aware of Drawing Discrepancy (← links)
- 05000382/LER-1988-006, :on 880405,fire Impairment Not Issued Immediately for Removal of Lock,Per Tech Spec 3.7.11.Caused by Inadequate Administrative Control.Note Added to Work Authorization Instructions,Procedures Revised (← links)
- 05000382/LER-1989-005, :on 890222,Limiting Condition for Operation Action 3.8.1.1 Not Performed When Component Cooling Water Pump a Temporarily Removed from Svc.Caused by Misapplication of Terms Operable & Operability (← links)
- 05000382/LER-1989-016, :on 890802 & 04,loss of Electrical Power to Fuel Handling Bldg Isolation Radiation Monitor Resulted in Automatic Starts of Train B Filtration Unit.Caused by Personnel Error.Electrical Power Restored (← links)
- 05000382/LER-1989-015, :on 890728,containment Isolation Valve Found Inoperable Due to Inadequate Design & Procedure.Relay Test Procedure Revised & Sys Evaluated to Minimize Water Hammer Effects (← links)
- 05000382/LER-1988-026, :on 881028,mgt Informed That Wrong Piping Class Tubing Installed for Boric Acid Makeup Tank Level Indicators.Caused by Personnel Error.Safety Evaluation Program Being Reviewed for Enhancements (← links)
- 05000382/LER-1989-010, :on 890520,determined That Low Recirculation Flow Not Included in Pump Operability Which Resulted in Noncompliance W/Tech Spec 4.0.5.Caused by Miscommunication. Procedures Revised (← links)
- 05000382/LER-1989-014, :on 890718,discovered That Plant Operated in Condition Prohibited by Tech Specs Re Cooling Water Valves. Caused by Inadequate Review of ASME Section Xi.Concluded That Valves Operable (← links)
- 05000382/LER-1989-006, :on 870105,discovered That Two Manual Isolation Valves Were Shown to Be Normally Open on Design Drawings. Caused by Programmatic Breakdown in Administrative Controls. Valves Closed & Design Drawings Revised (← links)
- 05000382/LER-1989-013, :on 890719,rapidly Decreasing Level Observed in Steam Generator 1 Resulting in Manual Reactor Trip.Caused by Circuit Failure in Position Control Circuitry.Circuit Card W/Failed Component Replaced & Sys Restored (← links)
- 05000382/LER-1989-007, :on 841218 & 890331,inadequate Design of Air Accumulators Allowed Plant to Operate in Unanalyzed Condition Since Initial Startup.Caused by Inadequate Review of Design Requirements.Accumlators Modified (← links)
- 05000382/LER-1989-011, :on 890516,discovered Fuel Handling Bldg Normal Ventialtion Exhaust Radiation Monitor B Indicated Zero Process Flow.Caused by Intermittent Equipment Failure.Closer Monitoring of Radiation Sys Stressed (← links)
- 05000382/LER-1987-022, :on 870814,automatic Start of Train B Control Room & Fuel Handling Bldg Emergency Filtration Units Occurred.Caused by Mechanical Binding of Relay Operating Mechanism.Evaluation of Reliability Underway (← links)
- 05000382/LER-1998-017, :on 980803,calculated Peak Clad Temp Exceeded 10CFR50.46 Criteria.Caused by Energy Redistributed Factor Error.Incorporated 0.2kw/ft Penalty for Plhgr Into Colss,Per Wa 01162252 (← links)
- 05000382/LER-1987-021, :on 870807,fire Seal for Penetration VI A0126 Discovered Missing.Caused by Error in Const Documentation. Seal Will Be Repaired by 870930 & Station Mod 2001 Issued to Revise Appropriate Documents (← links)
- 05000382/LER-1987-026, :on 871123,chemical & Vol Control Valves Failed to Meet Containment Penetration Backup Overcurrent Protection Operability Requirement.Caused by Personnel Error.Cables Properly Connected (← links)
- 05000382/LER-1987-027, :on 871125,discovered Fire Impairment When Installed Drain Pipe Not Capped at Either End.Caused by Inadequate Design Change Controls During Plant Const.Pipe Removed & New Procedures Implemented (← links)
- 05000382/LER-1987-018, :on 870716,containment Pressure Transmitter CB-IPT-6702 Smd Found Isolated.Caused by Failure of Technicians to Properly Restore Transmitter Following Calibr on 861220.Technician Counseled & Disciplined (← links)
- 05000382/LER-1987-019, :on 870724,during Review of Firewatch Logs, Personnel Discovered That Hourly Firewatch Not Performed on 870711 on 35 Ft Elevation of Reactor Auxiliary Bldg.Caused by Poor Communication.Procedures Changed (← links)
- 05000382/LER-1987-020, :on 870731,reactor Trip Occurred During Main Condenser Waterbox Isolation.Caused by Insufficient Margin Between High Level Main Feedwater Pump & Low Hotwell Level Pump Setpoints.Procedures Revised (← links)
- 05000382/LER-1998-016, :on 980730,failed to Meet TS Requirements for for RT Bypasses.Cause Not Determined Because of Age of condition.1E-4% Bistables for All for Channels of Excore Log Power Channels Were Declared Inoperable 980730 (← links)
- 05000382/LER-1998-015, :on 980724,discovered That T-ring Rubber Seat on CR Normal Outside Air Intake Downstream Isolation Valve Was Incorrectly Installed.Caused by Inadequate Info in Vendor Manual.Reworked Valves to Correct Configuration (← links)
- 05000382/LER-1998-014, :on 980716,manual Reactor Trip W/Subsequent EFAS Actuation Occurred.Caused by Short Circuit in FW Pump Turbine a Speed Control Relay.Plant Mgt Established Significant Event Response Team (← links)
- 05000382/LER-1998-008-01, Forwards LER 98-008-01,updating Info Re Potential for Concurrent Reduced Cooling Capacity in Both Trains of Ecw Sys.Revs Are Annotated W/Vertical Change Bars in right-hand Margin (← links)
- 05000382/LER-1998-013, :on 980701,IST Valve Surveillances Were Missed. Caused by Inadequate Processing of Info Transferred Between Operations Procedure Group & Programs Engineering.Procedure Revised (← links)
- 05000382/LER-1996-015, :on 961101,noted That Containment Penetration 20 Was Not Totally Isolated During Maint on Valve CC-808A. Caused by Personnel Error.Issued Ltr W3B1-96-0083 Re TS 3.6.3 to All Licensed Personnel & Revised CCW Drawings (← links)
- 05000382/LER-1996-015-02, Forwards LER 96-015-02 Which Revises Previous Submittal by Deleting Info Re long-term Corrective Action for Event.Info Deleted Has Been Annotated by Vertical Line in right-hand Margin (← links)
- 05000382/LER-1998-012, :on 980609,TS Channel Check for TS Surveillance 4.3.1.1 Was Missed.Caused by Human Error.Involved Employees Were Counseled & All Licensed Operators Were Apprised of Event (← links)
- 05000382/LER-1987-025, :on 871003-16,four Instances of Missed Tech Specs (TS) Sampling Requirements Noted.Caused by Breakdown in Administrative Controls.Methods of Tracking TS Required Sampling Revised (← links)
- 05000382/LER-1998-011, :on 980603,TS 3.0.3 Entry Was Noted.Caused by Component Cooling Water Makeup Check Valve Failing Ist. Operability of a Train of CCW Was Restored Immediately & Check Valve Internals Were Replaced (← links)
- 05000382/LER-1989-012, :on 890706,health Physics Technician Noted That Liquid Waste Mgt Sys Effluent Radiation Monitor Sample Pump Not Operating During Radioactive Release of Waste Condensate Tank A.Caused by Inadequate Review of Software (← links)
- 05000382/LER-1989-004, :on 890303,personnel Noted That Essential Chiller a Experiencing Problems Maintaining Chilled Water Temp.Caused by Small Crack in Low Pressure Valve Ball Float. Unit Shut Down for Maint.Chiller a Replaced (← links)
- 05000382/LER-1987-024, :on 870911,diesel Fuel Oil Storage Tank Level Found to Have Been Below Tech Spec Limits.Caused by Procedural Deficiency of Not Accounting for Unusable Fuel. Procedures Revised (← links)
- 05000382/LER-1989-003, :on 890204,operators Inadvertently Allowed LPSI Pump B to Start During Testing.Caused by Personnel Error.Personnel Responsible Counseled to Be More Cautious & Thorough Approach When Following Procedures (← links)
- 05000382/LER-1987-014, :on 870828,discovered That Fire Hydrant Hose Houses & Computer Room Halon Sys Surveillance Intervals Exceeded Tech Spec Requirements.Caused by Automatic Scheduling Sys Failure.New Sys in Place (← links)
- 05000382/LER-1989-002, :on 890125,personnel Discovered Discrepancy W/ Safety Classification of Instrument Air Tubing That Supplies Actuators of Safety Injection Sump Outlet Isolation Valves. Caused by Insufficient Documentation (← links)
- 05000382/LER-1987-017, :on 870601,diesel Fuel Oil Analysis Results Not Received within Required Time.Caused by Personnel Transfer at Contract Lab.Individual Responsible for Analysis Not Aware of 7-day Reporting Requirement (← links)
- 05000382/LER-1987-023, :on 870813,invalid Grab Samples of Condenser Vacuum Pump Effluent Gas Resulted Due to Condensation from Pump Steam.Caused by Loop Seal Failure.New Method for Sampling Devised (← links)
- 05000382/LER-1998-004, :on 980304,TS 4.0.3 Condition - CPC Channel Functional Test,Was Concluded from Preliminary CEOG Rept. Caused by Human Error.Cpc Channels A,B & C Were Satisfactorily Tested (← links)
- 05000382/LER-1998-003, :on 980302,inoperable Hydrogen Analyzers Were Noted Due to Undersized Thermal Overloads.Engineering Personnel Conducted all-hands Meetings to Discuss Management Expectations for Verifying Critical Design Inputs (← links)
- 05000382/LER-1996-015-01, Forwards LER 96-015-01 Re Failure to Isolate Containment Penetration 20.Revised Info in Text of LER Is Identified by Vertical Line in right-hand Margin,For Ease of Identification (← links)
- 05000382/LER-1997-023, :on 970708,EDG Fuel Sys Surveillance Was Missed Due to Failure of Personnel to Determine Intended Start & End Dates for SR 4.8.1.1.2.h.2 Interval.Submitted Application for Emergency Amend for Removal of SR (← links)
- 05000382/LER-1999-014, :on 990910,reactor Shutdown Due to Loss of Controlled bleed-off Flow,Occurred.Caused by Rotating Baffle failure.Two-piece Rotating Baffle of Original Design Was Located & Installed,In Order to Repair RCP 2B (← links)
- 05000382/LER-1998-002, :on 980215,brief Loss of Command Function in CR Occurred.Caused by Inappropriate Action (Human Error) on Part of Shift Superintendent.Ss Was Counseled IAW Corporate Discipline Policy (← links)
- 05000382/LER-1998-007, :on 980317,discovered That No Allowance for Instrument Loop Uncertainity Included in Surveillance for Chilled Water Outlet Temp.Caused by Failure to Consider Instrument Loop Uncertainty.Revised Task (← links)
- 05000382/LER-1987-016, :on 870525,reactor Trip Occurred on Low Steam Generator Level.Caused by Failure of Feedwater Control Sys Fuse to Open Which Caused Main Feedwater Pump B to Go to Min Speed.Associated Circuit Card Replaced (← links)
- 05000382/LER-1998-006, :on 980306,increased Differential Pressure for Feedwater Isolation Valves Occurred.Caused by Failure to Consider All Pressure Source Affecting Mfivs.Admin Controls Have Been Enacted Requiring Entry Into TS 3.6.3 (← links)
- 05000382/LER-1998-005, :on 980312,missed Thermal Overload TS Surveillance Were Noted.Caused by Inadequate Review of 1992 Rev to TS 3.8.4.2 IAW GL 91-08.Thermal Overloads for 8 MOVs Were Subsequently Tested & Determined to Be Operable (← links)
- 05000382/LER-1999-007-01, :on 990625,operation Outside Tornado Missile Protection Licensing Basis for turbine-driven EFW Pump & Steam Supply Piping,Was Discovered.Caused Indeterminent. Entergy Will Submit 10CFR50.90 to NRC Staff (← links)
- 05000382/LER-1987-015, :on 870518,control Room Ventilation Sys ESF Actuation Occurred.Caused by Electrical Spike Due to Deenergization of Large Relay in Chemical Detection Sys.Mod Installed in Monitors to Reduce Sensitivity (← links)
- 05000382/LER-1987-008, :on 870315,reactor Tripped Due to High Water Level in Steam Generator 1.Caused by Intermittent Malfunction of Feedwater Control Sys.Temporary Recorders Installed for Approx 1 Month to Monitor Sys (← links)
- 05000382/LER-1987-012, On 870413,reactor Trip Occurred Due to Control Element Assembly Calculator (Ceac) 2 Mistakenly Removed for Test W/Ceac 1 Out of Svc.Caused by Inadequate Procedures. Procedures Reviewed & Revised (← links)
- 05000382/LER-1986-024, :on 861021,boric Acid Condensate Tank D Inadvertently Discharged to Circulating Water Sys.Caused by Procedural Noncompliance.Operating Procedure Revised & Operations Personnel Counseled (← links)
- 05000382/LER-1987-013, :on 870415,facility Shut Down in Hot Standby Due to Personnel Discovering Fire Wrap for Conduit Missing During Walkdown to Update Fire Wrap Drawings.Caused by Contractor Installation Oversight (← links)
- 05000382/LER-1986-025, :on 861022,reactor Trip Occurred.Caused by Trying to Maintain Steam Generator Levels at Low Reactor Power for Prolonged Period,Following Reactor Trip on 861021. Valve Positioner Replaced (← links)
- 05000382/LER-1986-022, :on 861020,control Room Isolation Occurred. Caused by Degraded Electrical Connection in Barton Model 765 Flow Transmitter.Transmitter Replaced (← links)
- 05000382/LER-1986-023, :on 861020,reactor Tripped Coincident W/ Emergency Feedwater Actuation.Caused by Dropped Control Element Assembly Due to Failed Lower Gripper Hall Effect Sensor on Assembly 21.Sensor Replaced (← links)
- 05000382/LER-1986-029, :on 861228,hi-hi Alarm Occurred on Radiation Monitor ARM-IRE-0200.1S.Caused by Monitors Sensitivity to Electrical Spikes,Vibration & Light.Efforts Continuing to Reduce Sensitivity of Monitors (← links)
- 05000382/LER-1987-004, :on 870131,penetration Fire Seal II A0779 Found Damaged.Caused by Insensitivity to Maintaining Configuration Control of Fire Seals by Technicians.Work Request Issued to Repair Damaged Seals (← links)
- 05000382/LER-1999-013, :on 990825,exceeding TS Limits for RCS Cooldown Rate Was Discovered.Caused by Inadequate Content & Inadequate Implementation of TS Requirements.Page 2 of 2 in Attachment 2 of Incoming Submittal Not Included (← links)
- 05000382/LER-1999-012-01, :on 990812,potential Operation with Both Control Room Normal Outside Air Intakes Valves Inoperable Occurred.Cause for Event Was Indeterminate.Seat Leakage Requirements Calculated.With (← links)
- 05000382/LER-1997-016-01, Forwards LER 97-016-01 Which Repts Similar Potential as That Contained in LER 97-016-00,that Existed for SG Differential Pressure Instrumentation Associated W/Efas (← links)
- 05000382/LER-1986-026, :on 861120,inadvertent Actuation of Ventilation Emergency Filtration Sys in Fuel Handling Bldg Occurred. Caused by Personnel Error.Rev to Procedure MI-3-362 Initiated & Meeting Held W/Personnel (← links)
- 05000382/LER-1986-027, :on 861120,personnel Discovered That Fire Protection Valves Not Verified in Correct Position within 31 Days as Required by Tech Spec Due to Inadequate Procedures. Valves Verified in Open Position & Documented (← links)
- 05000382/LER-1999-011-01, :on 990801,with Plant Operating 100% Power, Lowering RCP Seal Pressures,Along with Dropping Controlled bleed-off (Cbo) & Increasing Cbo Temp Discovered.Caused by fatigue-induced Failure of Rotating Baffle of RCP 2B (← links)
- 05000382/LER-1987-003, :on 870122,radiation Monitor Alarmed Due to Contaminated Instrument & Controls (I&C) Technician.Caused by Health Physics Technician Improperly Downgrading Work Permit Requirements.I&C Technician Retrained (← links)
- 05000382/LER-1986-021, :on 860924,hourly Firewatch Tour Not Performed in Shutdown Cooling HX Room B.Caused by Personnel Error.Post Order for Firewatch Patrol Revised (← links)
- 05000382/LER-1999-010-01, :on 990726,discovered Inadequate Pumping Capacity in Dry Cooling Tower Area.Caused by Inadequate Design Control.Portable Pumps Were Installed in Each Dry Cooling Tower Areas to Ensure Sufficient Pumping Capacity (← links)
- 05000382/LER-1999-009-01, :on 990727,discovered App R Noncompliance Condition Involving Inadequate Separation of Safe Shutdown Cables.Caused Design Analysis Deficiency.Compensatory Measures Were Established (← links)
- 05000382/LER-1986-020, :on 860915,18 & 1002,ESF Portion of Control Room Ventilation Sys Actuated Inadvertently.Caused by Electrical Spikes in Control Room Outside Air Intake Radiation Monitors.Evaluation Continuing (← links)
- 05000382/LER-1987-002, :on 870116,21 Snubbers Identified as Having Improperly Rotated End Paddles.Caused by Personnel Error.All Small Size Snubbers Tested & Replaced.Thermal & Loading Analyses of Inoperable Snubbers Performed (← links)
- 05000382/LER-1987-001, :on 870115,valve CC-710 Found Leaking Excessively & Valve Seat & Retaining Ring Missing.Caused by Error of Maint & QC Personnel of Installation Contractor.All Valves Listed in Table 3.6-1 Tested (← links)
- 05000382/LER-1986-018, :on 860903,seismically Unqualified Power Supply Panel for Hydrogen Recombiner Discovered.Caused by Absence of Structural Weld.Outside Foundation Weld Installed.W/ (← links)
- 05000382/LER-1997-014-01, Forwards LER 97-014-01 Which Provides Details of Reportable Deficiencies in Testing of Logic Circuits Identified During GL 96-01 Reviews & Evaluations (← links)
- 05000382/LER-1997-024, :on 970528,emergency Diesel Generator Autostart Occurred Due to start-up Transformer Failure.Implemented Procedures OP-901-311,OP-901-511 & OP-901-513 (← links)
- 05000382/LER-1999-008-01, :on 990629,failure to Perform Testing of ESF Filtration Units Per TS Was Noted.Cause for Testing Charcoal Samples Contrary to TS Could Not Be Determined.All Future Analysis Will Be Performed IAW ASTM D3803-1989,per GL 99-02 (← links)
- 05000382/LER-1986-017, :on 860811,chemistry Technicians Failed to Sample Proper Gas Decay Tank.Caused by Operations Personnel Realigning Inservice Tanks W/O Informing Chemistry Technicians.Procedure Revised (← links)
- 05000382/LER-1985-045, :on 851014 & 16,automatic Actuation of ESF Portion of Control Room Ventilation Sys Occurred.Caused by Electrical Spike & Coincident Normal Release,Respectively. Guide Issued Re Spurious Alarms (← links)
- 05000382/LER-1987-001-01, :on 870330,gaseous Waste Mgt Effluent Radiation Monitor Alarm/Trip Setpoint Set Factor of 10 Too High Since Plant Startup.Caused by Personnel Error.Rms,Its Database & Data Base Change Methodology Under Review (← links)
- 05000382/LER-1999-006-01, :on 990614,plant Experienced Automatic Reactor Trip Following Loss of 7kV Bus.Caused by Spurious Actuation of Relay on Either RCP 1A or 2A.Personnel Performed Final Switchgear Walkdown with Indications Normal.With (← links)
- 05000382/LER-1986-016, :on 860804 & 21,boron Concentration for Safety Injection Tanks Fell Below Tech Spec Limit.Caused by Insufficient Procedural Requirements.Procedure Change Will Be Made to Prevent Recurrence (← links)
- 05000382/LER-1986-011-01, Forwards LER 86-011-01,revised Per Determination That Deviations to App R Requirements for Fire Barriers w/228 Seals Identified to Have Sleeve Type Configuration as Described in LER Not Required (← links)
- 05000382/LER-1987-005, :on 870211,safety Injection Tank 1B Drained to Level Below Tech Spec Limits.Caused by Procedural Inadequacies Re Narrow Range Level Instrument Ref Leg. Procedures Will Be Revised (← links)
- 05000382/LER-1986-012, :on 860625,discovered That Surveillance for Fire Doors D221 & D222 Not Performed on Daily Basis.Caused by Lack of Interdepartmental Communication.Procedure OP-903-001 Revised (← links)
- 05000382/LER-1986-010, :on 860602,secondary Coolant Sys Not Sampled for Specific Activity as Required by Tech Specs.Caused by Personnel Error.Surveillance Rescheduled to Specific Day of Wk (← links)
- 05000382/LER-1987-009, :on 870317,discovered That Instrument Used to Determine Containment Internal Pressure Not Sufficiently Accurate.Caused by Design Deficiency.Calculational Methodology Substituted (← links)
- 05000382/LER-1987-010, :on 870318,discovered That Retest of Pressurizer Surge Line PSL-203 Sample Header Inside Containment Isolation Valve Not Performed.Caused by Failure to Comply W/Mgt Controls & Procedures (← links)
- 05000382/LER-1998-021, :on 981210,boron Concentration Below TS Limit in SIT 2B,occurred.Caused by Lack of Complete Understanding of Cumulative Effects of Sys Design.B Concentration in SIT 2B Was Returned to within TS Required Concentrations (← links)
- 05000382/LER-1998-020, :on 981204,determined That Certain Core Power Distribution SRs Had Been Incorrectly Scheduled.Caused by TS Change Implementation Error.Will Perform Final Review of TS SRs with 4.0.4 Exemption.With (← links)
- 05000382/LER-1988-025, :on 881010,several Discrepancies Associated W/ Fire Rated Assemblies Discovered That Were Not Included in Surveillance Procedure ME-3-009, Fire Walls,Floors, Ceilings. Caused by Procedural Inadequacy (← links)
- 05000382/LER-1987-006, :on 870306,instrument & Control Technicians Inadvertently Actuated ESF Portion of Fuel Handling Bldg Ventilation Sys.Caused by Personnel Error.Personnel Counseled.Procedure MI-3-362 Revised (← links)
- 05000382/LER-1986-009, :on 860509,while Operating at 100% Power, Uncomplicated Reactor Trip Occurred.Caused by Failure of Reed Switch on Control Element Assembly 35.Faulty Switch Replaced & Assembly Calculator Returned to Svc (← links)
- 05000382/LER-1986-008, :on 860504 & 10,emergency Feedwater Actuation Signals Occurred.Caused by Failure of Reactor Operator to Remove Bypass on Hi Steam Generator 2 Delta P Bistable for Channel A.Surveillance Procedure Revised (← links)
- 05000382/LER-1999-003-02, :on 990311,determined That Four Containment Vacuum Relief valves,CVR-101,CVR-201,CVR-102 & CVR-202,were Not Tested.Caused by Contractor Supply of Misinformation. Details of Event Discussed with Contractor.With (← links)
- 05000382/LER-1986-003, :on 860124,0204 & 09,inadvertent Actuations of ESF Portion of Control Room Ventilation Sys Occurred.Caused by Technician Bumping Monitor,Electrical Spike & Chlorine Detector Alarm.Caution Signs Posted (← links)
- 05000382/LER-1986-002, :on 860122,control Element Assembly 88 Dropped Into Core,Precipitating Reactor Trip.Caused by Not Turning on Fan Blower Toggle Switch & Isolation Valves Failing to Open.Procedure Changed Re Gag Removal (← links)
- 05000382/LER-1986-015, :on 860714,loss of Shutdown Cooling Occurred. Caused by Simultaneous Use of Methods of Draining RCS & Inaccurate Level Indication.Procedures OP-1-003 & OP-901-046 Revised (← links)
- 05000382/LER-1986-014, :on 860710,maint Personnel Inadvertently Opened Safety Injection Tank 1B & 2B Isolation Valves.Caused by Inadequate Work Instructions.Personnel Will Be Prevented from Disconnecting Leads While Performing Work (← links)
- 05000382/LER-1986-013, :on 860630,reactor Trip & Low DNBR Ratio & Emergency Feedwater Activation Occurred.Caused by Unlocked Cable Connector for Control Element Assembly 35.Maint Personnel Revised Procedure MI-13-523 (← links)
- 05000382/LER-1999-002-03, :on 990225,discovered RCS Pressure Boundary Leakage on Two Inconel 600 Instrument Nozzles.Caused by Axial Cracks Near HAZ of Nozzle Partial Penetration Welds Resulting from Pwscc.Leaking Nozzles Have Been Repaired (← links)
- 05000382/LER-1985-007, :on 850314,inadvertent Actuation of Reactor Protection Sys Occurred During Reactor Shutdown.Caused by Electrical Noise in Core Protection Calculator Channels C & D.Further Investigation Underway (← links)
- 05000382/LER-1988-024, :on 880524,failure to Perform Sealed Source Leak Check of ex-core Nuclear Fission Detector Before Transfer of Device Offsite Discovered.Caused by Procedural Inadequacy.Rev of Procedure Underway (← links)
- 05000382/LER-1986-007, :on 860406,fire Watch Tour for Fire Impairment 85-232 Not Satisfactorily Performed.Caused by Misnumbered Pages in Fire Watch Log.Responsibilities for Handling Logs Posted (← links)
- 05000382/LER-1986-019, :on 860909,during Full Power,Reactor Tripped Due to Turbine Trip.Caused by Alternate Drain Valve Failure Resulting in hi-hi Level in Moisture Separator Reheater Shell Drain Tank 2.Valve Reworked (← links)
- 05000382/LER-1997-021, :on 970611,inside & Outside Containment Isolation Valves Failed Leakage Criteria.Caused by Excessive Corrosion.Piping Penetration Drained,Repaired & Replaced Defective Valves & Restored Penetration to Leakage Criteria (← links)
- 05000382/LER-1997-021-01, Forwards LER 97-021-01,revising Details of Rept Submitted 970711 Re Primary Containment Integrity Having Been Found to Be Degraded (← links)
- 05000382/LER-1997-029, :on 971113,inadequate Surveillance Testing of Relay Contacts in safety-related Logic Circuits Noted.Caused by Inadequate Surveillance Procedure OP-903-094.Revised Procedure & Tested Applicable Contacts (← links)
- 05000382/LER-1997-028, :on 970720,automatic Start of EDG a Occurred Due to Loss of Power to 3A Safety Bus.Caused by Spurious Trip of 86A2 Relay.Reset 86A2 Relay,Closed 2-3 Tie Breaker & Restored Offsite Power (← links)
- 05000382/LER-1986-004, :on 860314,LPSI Pump B Discharge Valve Found Closed W/Danger Tag Affixed.Caused by Personnel Error.Valve Opened.Procedure UNT-5-003 Revised to Stress Function of Clearance Sheets (← links)
- 05000382/LER-1999-001, :on 990105,TS 3.0.3 Was Entered.Caused by Less than Adequate Chiller Thermostat Control.Placed Tamper Seal on Chiller Thermostat.With (← links)
- 05000382/LER-1997-026, :on 971105,single Failure Effects Condensate Storage Pool Inventory Occurred.Caused by Design Deficiency. Procedure Change Initiated (← links)
- 05000382/LER-1997-025, :on 971017,gag for Valve CC-835B Was Partially Engaged Restricting Valve to Approx 80% Open.Caused by Inadequate Work Instructions.Gag Was Completely Disengaged on Valve CC-835B (← links)
- 05000382/LER-1997-034, :on 971217,missed Mechanical Snubber Surveillance Was Revealed.Caused by Failure to Perform Snubber Functional Test.Spare PSA-100 Snubber Was Satisfactorily Tested & Installed (← links)
- 05000382/LER-1995-002, :on 950610,reactor Trip,Partial Loss of Offsite Power & non-safety Related Switchgear Fire Occurred.Caused by Improper Automatic Bus Transfer.New Automatic Bus Transfer Scheme Installed (← links)
- 05000382/LER-1995-002-01, Forwards LER 95-002-01 Providing Details of Design Change 3448 Installed During Refueling Outage 8 as Result of 950610 Reactor Trip,Partial Loss of Offsite Power & Fire.Revised Info Identified by Vertical Line in right-hand (← links)
- 05000382/LER-1985-043, :on 851003,after Securing Both Reactor Auxiliary Bldg Normal Ventilation Fans to Replace Supply Unit Filters,High Radiation Alarm Received on Control Room Outside Air Intake Radiation Monitors (← links)
- 05000382/LER-1990-016-02, :on 901014,two Posted High Radiation Areas Greater than 1000 Mrems Discovered Not Locked Per Tech Spec 6.12.2.W/undated Ltr (← links)
- 05000382/LER-1997-031, :on 971120,HR Analyzer Valves Position Did Not Meet TS Requirements.Caused by Inadequate Design.Verified Valves Were in Closed Position,Declared Remote Position Indication for Valves Inoperable & Entered TS 3.3.3.6 (← links)
- 05000382/LER-1986-005, :on 860318,during Mode 5,Surveillance Procedure OP-903-013 Error Resulted in Hot Leg Temp Accident.Caused by Suspect Monitoring Instrument Operability.Procedure Changed (← links)
- 05000382/LER-1999-004-02, :on 990415,discovered That Complete Response Time for ESFAS Containment Cooling Function Had Not Been Performed.Caused by Response Time Testing Deficiency. Procedures Will Be Revised to Include Subject Testing (← links)
- 05000382/LER-1998-019, :on 980920,failure of Containment Isolation Valves to Close During Testing Was Noted.Caused by Solenoid Failures.Solenoids Were Replaced & Valves Were Retested Successfully (← links)
- 05000382/LER-1998-019-01, Forwards LER 98-019-01,IAW 10CFR50.73(a)(2)(ii). LER 98-019-00,discussed.Refs to Feedwater Valves Have Been Deleted in Revised LER (← links)
- 05000382/LER-1997-011, :on 970321,containment Spray Water Was Less than Required by TS Due to Instrument Uncertainty.Indicated Water Level in CS Riser B Was Raised to 191 Feet (← links)
- 05000382/LER-1997-011-01, Forwards LER 97-011-01,revising Previous Submittal Re Water Level Maintained in Containment Spray Risers That May Have Been Less than Required by Ts.Commitments Discussed (← links)
- 05000382/LER-1999-005-01, :on 980702,determined That Four Contacts in Control Circuits of EFW Control Valves Were Untested.Caused by Personnel Error.Untested Contacts Have Been Tested (← links)
- 05000382/LER-1988-002, :on 880126,reactor Manually Tripped When Reactor Coolant Pump Upper Thrust Bearing Overheated.Caused by Clogged Lube Oil Strainer.Small Mesh Strainer Replaced W/Larger Mesh Strainer (← links)
- 05000382/LER-1988-014, :on 880528,reactor Vessel Level Monitoring Sys Discovered Inoperable.Caused by Cognitive Personnel Error & Poorly Human Factored Surveillance Procedure.Sys Restored to Operation (← links)
- 05000382/LER-1988-011, :on 880525,fire Seal for Penetration VIA0179 Discovered Impaired.Caused by Initial Design & Const Error. Mod Initiated to Correct Seal (← links)
- 05000382/LER-1988-013, :on 880528,fire Protection Sprinkler Found Isolated After Restoration from Testing.Caused by Personnel Error.Procedures Being Revised to Require Contaminated Valve Lineup Sheets Be Photocopied or Verified (← links)
- 05000382/LER-1988-012, :on 880526,steam Generator Blowdown Sampling Exceeded Required Periodicity of Tech Specs 3.3.3.1,Action 28.Caused by Personnel Error.Procedures Being Revised to Verify That Monitor Inservice & Sampling Done (← links)
- 05000382/LER-1987-028, :on 871211,reactor Trip Occurred Due to Inadvertent Shutting of Msiv.Caused by Solenoid Valve Stuck Open During Testing.Solenoid Valve Replaced & MSIV Tested Successfully Prior to Restarting of Plant (← links)
- 05000382/LER-1988-003, :on 880219-20 & 0315,control Room Outside Air Intake Radiation Monitor Spuriously Actuated ESF Portion of Ventilation Sys.Caused by Equipment Malfunction.Shield Replaced & Design Change Under Consideration (← links)
- 05000382/LER-1988-022, :on 880523,identified Failure to Perform Dye Penetrant Testing on Five Socket Welds as Potentially Reportable.Caused by Failure to Follow Procedures.Applicable Welding Procedures Will Be Revised (← links)
- 05000382/LER-1987-030, :on 870819,gas Decay Tank Hydrogen & Oxygen Samples Not Analyzed within 4 H of Sampling.Caused by Plugged Sample Injection Syringe for Gas Chromatograph. Station Mod Implemented (← links)
- 05000382/LER-1987-031, :on 871021,containment Atmosphere Purge Isolation Valves 103 & 205 Exceeded Required Stroke Time Surveillance.Caused by Inadequate Administrative Controls. Procedures Adequately Revised (← links)
- 05000382/LER-1988-009, :on 880423,containment Purge Isolation Radiation Monitors Inoperable Due to Inadequate Procedures. Applicable Procedures Being Revised.Plant Stack Monitors Operable & Capable of Terminating Purge (← links)
- 05000382/LER-1988-023, :on 880827,determined That Containment Spray Pump May Not Have Met ASME Pump Inservice Test Requirements When Vibration Detector Found Out of Calibr.Caused by Inadequate Procedural Controls.Detector Calibr (← links)
- 05000382/LER-1988-007, :on 880413,discovered That Monthly Tech Spec Sampling Requirement Missed.Caused by Cognitive Personnel Error Due to Not Filing Surveillance Tickler Cards.Sample Taken & Found to Be in Spec (← links)
- 05000382/LER-1997-032-01, Forwards LER 97-032-01,re Details of Noncompliance with Plant TS Due to Failure to Meet GDC 54,per 10CFR50.73 (a)(2)(i)(B) (← links)
- 05000382/LER-1988-008, :on 880417,Train a Control Room & Fuel Handling Bldg Emergency Filtration Units Automatically Started Due to Voltage Fluctuation on Vital Uninterruptible Bus.Cause Not Stated.Equipment Returned to Normal (← links)
- 05000382/LER-1998-018, :on 980901,TS 3.0.3 Was Entered,As Bldg Ventilation Valve Train a & B Inoperable Simultaneously. Caused by Electricians Performing Maint on Wrong Component. Panel Debriefing Held with Involved Personnel (← links)
- 05000382/LER-1986-001, :on 860107,reactor Trip Occurred on Dropped Control Element Assembly (Cea).Caused by Faulty Automatic CEA Calculator Timing Module.Card Replaced on 860123 & Sent to C-E for Evaluation (← links)
- 05000382/LER-1985-049, :on 851126,calculation Error Discovered in Wet Cooling Tower Basin Level Instrumentation.Basin Water Level Restored Above Tech Spec Level & Documentation Revised (← links)
- 05000382/LER-1988-021, :on 880711,plant Operated in Condition Prohibited by Tech Specs for Approx 5 H Due to Emergency Diesel Generator Maint.Caused by Personnel Error.Event Discussed W/Personnel (← links)
- 05000382/LER-1988-005, :on 880321,blown Undervoltage Circuit Fuse Replacement Results in Tech Spec 3.0.3 Entry.Caused by Inadvertent Shortening of Two Wire Connections.Change to Tech Spec Being Pursued to Correct Deficiency (← links)
- 05000382/LER-1988-020, :on 880701,diesel Generator Fuel Oil Not Analyzed by Specific Procedure.Caused by Personnel Error. Tech Spec Change Requested to Require That Fuel Oil Quality Meet Specs ASTM-D975 But Not Require Tests (← links)
- 05000382/LER-1987-029, :on 870402,failure to Meet Safety to Nonsafety Electrical Distribution Separation Criteria Discovered. Caused by Cognitive Personnel Error in Developing Design Changes.Sys Expert to Review Design Changes (← links)
- 05000382/LER-1988-004, :on 880303,required Environ Seal (Es) Found Missing from Valve Position Indication (Vpi) Conduit.Vpi May Not Have Complied W/Reg Guide 1.97.Caused by Personnel Error Due to Improper Review.Es Installed (← links)
- 05000382/LER-1988-018, :on 880621,fire Protection (FP) Valve 5165 W/O Locking Device.Caused by Personnel Error.Locking Device Installed on FP Valve 5161 on 880621 & Importance of Proper Verification of Valve Position Stressed (← links)
- 05000382/LER-1988-016, :on 880614,reactor Trip Due to Turbine Control Sys Failure & Procedural Inadequacy.Caused by Equipment Malfunction.Procedures Being Revised to Include Precautions for Overspeed Protection Control Testing (← links)
- 05000382/LER-1988-015, :on 880613,plant Shutdown Required Due to Leakage Past Reactor Coolant Loop Drain Valves.Caused by Inadequate Hand Closing One of Drain Valves.Valves Will Be Evaluated & Corrective Action Recommended (← links)
- 05000382/LER-1997-022, :on 970614,RWSP Boron Concentration Was Lower than Rcs,In Volation of TS 3.7.6.2b.Caused by Incorrect Assumptions by Operations Dept Staff & Mgt.Waterford 3 Will Submit TS Change for TS 3.7.6.2b (← links)
- 05000382/LER-1997-019, :on 970529,non-compliance with TS 3.3.3.6 for Containment Isolation Valve Position Indication Was Noted. Caused by Misinterpretation of Requirements of RG 1.97. Revised Submittal to NRC (← links)
- 05000382/LER-1997-006, :on 970221,discovered Void at Penetration 39 During Ultrasonic Testing of Lpsi.Caused by TS 4.5.2j Not Being Completed post-maint.Invoked TS Requirement Surveillance 4.0.3 to Complete TS 4.5.2j (← links)
- 05000382/LER-1986-006, :on 860322,discovered Weekly Surveillance for Inservice Boric Acid Makeup Tank a (Cb) Not Performed Since 860310.Caused by Lack of Sufficient Means to Track Numerous Surveillances (← links)
- 05000382/LER-1985-051, :on 851206,reactor Trip Occurred on Low Dnbr. Caused by Operator Error.Plant Conditions Stabilized in Mode 3.Operators Given Guidance Reemphasizing Importance of Adherence to Procedures (← links)
- 05000382/LER-1997-015, :on 970418,ultimate Heat Sink Did Not Incorporate Conservative Assumptions.Caused by Design Errors Associated W/Original Design of Ultimate Heat Sink. Operability Evaluation Completed on 970404 (← links)
- 05000382/LER-1997-018, :on 970428,voluntary LER for Dropped New Fuel Assembly Was Issued.Caused by Human Error.Sfhm Grappling Tool Was Inspected for Damage or Misalignment (← links)
- 05000382/LER-1997-007, :on 970309,discovered Addl Refueling Water Storage Pool Instrument Uncertainty.Caused by Inadequate Design for Reference Leg of Level Transmitters.Recalibrated Rwsp Transmitters & Conducted Tests (← links)
- 05000382/LER-1997-017, :on 970515,control Room Emergency Filtration Unit Common Mode Failed.Caused by Inadequate Design.Both Crefu Trains Declared Inoperable & TS 3.7.6.2 Was Entered & Emergency Work Authorization,Initiated (← links)
- 05000382/LER-1997-013, :on 970407,refueling Machine Failed to Meet TS Requirements.Caused by Failure to Assure Refueling Machines Circuitry Design Complied W/Ts.Software Controlling Overload Protection Features,Upgraded (← links)
- 05000382/LER-1997-012, :on 970404,programmatic Breakdown of Overtime Program Occurred.Caused by Lack of Mgt Oversight in Administering & Implementing Plants Working Hour Policy. Ltr Issued Reemphasizing Working Hour Policy (← links)
- 05000382/LER-1985-056, :on 851219,reactor Trip Occurred Due to Low Water Level in Both Steam Generators.Caused by Inadvertent Isolation of Air Evacuation Pump Suction Valve.Personnel Reinstructed Re Operating Errors (← links)
- 05000382/LER-1985-044, :on 851010,uncomplicated Reactor Trip Occurred. Caused by High Water Level in Steam Generator 2 When Control Board Operator Increased Feedwater Flow to Steam Generators. New Guidelines Issued (← links)
- 05000382/LER-1997-002, :on 970130,72 H Administrative Action Statement Entered Due to Declaring Shutdown Cooling HX B Inlet & Outlet Valves SI-125B & SI-412B Inoperable.Valves Declared Operable After Installation of Relief Devices (← links)
- 05000382/LER-1985-040, :on 850929,4.16 Kv Breaker Tripped,Resulting in Automatic Start of Emergency Diesel Generator a & Reactor Trip.Main Feedwater Pump B Also Tripped on Overspeed Condition.Undersize Cup Valve Seat Replaced (← links)
- 05000382/LER-1985-048, :on 851111,actuation of ESF Portion of Control Room Ventilation Sys (EIIS Sys Code VA) Occurred.Air Sample w/Xe-133 Level Equal to 3.6E-7 uCi/m1 Due to Normal Release During Actuation (← links)
- 05000382/LER-1985-037, :on 850905,personnel Discovered Two Fire Seal Impairments During Visual Insp of fire-rated Penetration Seals.During Addl sampling,13 Other Impairments Found.Cause Not Stated.Seals Replaced (← links)
- 05000382/LER-1997-010, :on 970305,failed to Meet Shield Bldg Ventilation TS Flow Criteria.Caused by Personnel Error. Readjusted Sbv Train B Flow Rate to within TS Acceptable Range (← links)
- 05000382/LER-1997-009, :on 970325,discovered Steam Generator (SG) Low Pressure Setpoint Below Ts.Caused by Inadequate Surveillance Procedure.Revised Surveillance Procedure to Require Channel for Each SG to Be Placed in Bypass During Test (← links)
- 05000382/LER-1985-034, :on 850707,reactor Trip & Emergency Feedwater Actuation Occurred.Caused by Personnel Error Due to Incorrect Positioning of Backwash Selector Switch.Mod Package Prepared to Increase Sys Reliability (← links)
- 05000382/LER-1997-008, :on 880419,discovered Incorrect Quantity of Tri-Sodium Phospate Used for ECCS Ph Determination.Caused by Personnel Error.Generated Corrective Action Document & Verified post-1988 Similar Surveillances (← links)
- 05000382/LER-1985-047, :on 851028,reactor Trip Occurred Due to Auxiliary Trip from Core Protection Calculator on High Pressurizer Pressure.Caused by Steam Leak from Suction Flange.Flange Repaired & Components Dried (← links)
- 05000382/LER-1985-053, :on 851212,discovered That Portion of Core Protection Calculator Tech Spec Functional Test Not Performed for Several Intervals.Caused by Procedural Change Eliminating Requirement.Procedure Changed (← links)
- 05000382/LER-1985-052, :on 851209,containment Cooling Water Return Header from Containment Liquid Radiation Monitor Found Out of Svc Since 851205.Caused by Personnel Error.Ler Will Be Reviewed in Operator Training (← links)
- 05000382/LER-1985-050, :on 851202,04 & 09,fire Watch Tours Not Conducted.Caused by New Employees Unfamiliar W/Facility Health Physics Controls Requiring Dress Out Before Entering Area.Employee Terminated on 851209 (← links)
- 05000382/LER-1985-046, :on 851017,fire Watch Irregularities Discovered When Fire Watch Log Compared to Security Cardreader Computer Access History Printout.Caused by Individual Not Performing Assigned Fire Watch Consistent W/Tech Specs (← links)
- 05000382/LER-1997-005, :on 890715,failure to Perform Coolant Low Flow Trip Operating Bypass Surveillance Occurred.Caused by Failure to Implement Procedural Controls to Test Reactor Coolant Low Flow Bypass.Event Will Be Reviewed (← links)
- 05000382/LER-1997-004, :on 971031,determined Interpretation of TS Surveillance 4.6.2.2.B.2 Was Incorrect.Caused by Plant Not Meeting Flow Rate Specified in TS Surveillance Requirement. DCT Tube Cleaned (← links)
- 05000382/LER-1997-003, :on 970130,process Analog Computer Card Failed on Essential Services Chilled Water Train B.Caused by Open Fuse on Process Analog Control.New Pac Card Installed & Calibrated (← links)
- 05000382/LER-1997-001, :on 970129,RG 1.97 Containment Isolation Valve Does Not Have Direct Position Indication.Caused by Incorrect Judgement Was Made That EFW FCVs Had Adequate Position.Condition Rept 96-1658 Was Generated (← links)
- 05000382/LER-1985-022, :on 850524,automatic Actuation of Reactor Protective Sys Occurred.Caused by Lack of Pressure Equalization Across Main Valve Piston.Valves Stroked at Cold Conditions (← links)
- 05000382/LER-1985-036, :on 850801,inadvertent Actuation of ESF Portion of Control Room Ventilation Sys Occurred Due to Spike in Control Room Outside Air Intake Radiation Monitor.Caused by Tears in Foil on Detectors.Detectors Replaced (← links)
- 05000382/LER-1996-014-01, :on 961023,discrepancy Identified Between Existing as-built Plant Configuration & Licensing Basis Documents Re Broad Range Gas Monitors.Caused by Inadequate Design Review.Monitor Declared Inoperable (← links)
- 05000382/LER-1996-009, :on 960726,valves Failed to Pass Leakage Test. Caused by Excessive Roughness in Valve Body Core.Replaced Valves CVR-402A & CVR-402B & Retested Both Valves Successfully (← links)
- 05000382/LER-1995-005, :on 951102,calibration Input Data for Some Safety & non-safety Rosemount,Differential Pressure Type Flow & Level Transmitters Were in Error Due to Ineffective Review Process.Tar 95-022 Was Installed (← links)
- 05000382/LER-1996-001, :on 951107,TS 3.0.3 Entered Due to SIT Levels Reading High.Caused by Poor Work Practices.Cr Staff Immediately Lowered SIT Levels Until within Specified Range for Compliance W/Tss (← links)
- 05000382/LER-1985-035, :on 850714,reactor Trip Occurred Due to Electrical Fault in Digital electro-hydraulic Control Panel. Caused by Overheated Resistor on Solid State Circuit Board. Different Resistors Installed (← links)
- 05000382/LER-1992-018-01, :on 920930,loss of 3A3-S Safety Bus Experienced When Bus Feeder Breaker Tripped Open on Degraded Voltage Condition.Caused by Personnel Error.Design Change Package Implementation Process Will Be Revised (← links)
- 05000382/LER-1985-041, :on 851002,uncomplicated Reactor Trip Occurred Due to Low Water Level in Steam Generator 2.Caused by Steam Flow Square Root Extractor Module Failing Low.Module Replaced (← links)
- 05000382/LER-1985-042, :on 851002,water Level in Steam Generator 2 Increased to High Level Reactor Trip Setpoint.Caused by Control Board Operator Being Distracted by Alarms/ Annunciations.Air Dryer Motor Replaced (← links)
- 05000382/LER-1985-039, :on 850912,19,27 & 1007,spurious Actuations of Control Room Ventilation Sys Occurred.Caused by Electrical Spikes &/Or Spurious Actuations of Air Intake Monitors. Monitors Modified.Investigation Continuing (← links)
- 05000382/LER-1985-033, :on 850705,high Level Reactor Trip Setpoint Occurred During Attempt to Transfer Feedwater Pump Load from Main Feedwater Pump B to A.Caused by Impurities in Control Oil for Valve Positioner.Oil Replaced (← links)
- 05000382/LER-1985-032, :on 850704,reactor Trip Occurred Due to Axial Shape Index Being Out of Range Allowed by Core Protection Calculator.Caused by Xenon Distribution.Plant Operators Given Temporary Guidance on Returning Power (← links)
- 05000382/LER-1985-031, :on 850704,main Feedwater Pump a Tripped Due to High Vibrations on Feedwater Pump Turbine.No Apparent Cause Noted.Alarming Function Will Remain in Place to Alert Personnel of Vibration Increase (← links)
- 05000382/LER-1985-038, :on 850910,discovered That Fire Wrap for Conduits 31509C-2A & 31551R-SA Did Not Completely Cover Support Points.Cause Not Stated.Condition Existed Since Const.Points Wrapped & Operability Verified (← links)
- 05000382/LER-1985-030, :on 850630,ESF Portion of Control Room Ventilation Sys Actuated Due to Electrical Spike in Control Room Air Intake Radiation Monitors.Caused by Portable Radio Transmitters Used Near Radiation Monitors (← links)
- 05000382/LER-1985-029, :on 850630,reactor Trip Occurred Due to High Water Level in Steam Generator 2.Caused by Valve Positioners for Main Feedwater Regulating Valves Out of Adjustment. Positioners Adjusted (← links)
- 05000382/LER-1985-028, :on 850627,DNBR & Local Power Density Trip Generated,Resulting in Actuation of Reactor Protective Sys. Caused by Control Element Assembly Position Deviation.Ler to Be Emphasized During Operator Training (← links)
- 05000382/LER-1985-026, :on 850626,small Opening Discovered in Penetration of Emergency Diesel Generator B Room Fire Wall. Condition Thought to Exist Since Const of Fire Wall.Fire Watch Posted & Wall Repaired (← links)
- 05000382/LER-1985-027, :on 850626,fire Occurred in Feedwater Pump B at 91% Power.Caused by Small Oil Leak.Fire Extinguished & Oil Reservoir Interconnected Across Top of Baffle Plate on Feedwater Pumps (← links)
- 05000382/LER-1985-025, :on 850620,discovered That Relay 57x for Emergency Diesel Generator B Failed to Actuate within Specified Tolerance.Caused by Faulty Relay & Personnel Error.Relay Replaced (← links)
- 05000382/LER-1985-023, :on 850608,emergency Feedwater Pump a Failed to Start While Integrated Emergency Diesel Generator/Esf Test Performed.Caused by Breaker Racking Motor Interlock Problem.Latching Mechanism Pulled Back (← links)
- 05000382/LER-1985-016, :on 850425,pressurized Heater Bank 2 Found W/O Required Nominal Capacity.Caused by Inadvertent Removal of Loaded Breaker Thought to Be Spare Breaker in Power Distribution Panel 376B (← links)
- 05000382/LER-1996-011-01, :on 960820,CR Normal Ventilation Isolation Valves (HVC-101 & HVC-102) Were Leaking.Caused by Debris Which Accumulated Inside Valves Disc Regions.Valves Were Closed (← links)
- 05000382/LER-1985-024, :on 850611,loss of Offsite Power Occurred Due to Loss of Side B 230-kV Incoming Feeder Line.Caused by Troubleshooting on Main Generator Oil Circuit Breaker B. Training Given on Oil Circuit Breaker Relays (← links)
- 05000382/LER-2020-001, (Waterford 3), Violation of Technical Specification 3.3.3.7.3.a (Broad Range Gas Detection) Due to Operators and Maintenance Technicians Not Performing Procedure Step as Intended (← links)
- 05000382/LER-1992-008, :on 920726,inadvertent Engineered Safety Features Actuation Due to Plant Protection Sys Test Circuit Malfunction.Trouble Shooting Plan Performed in Effort to Isolate Specific Components (← links)
- 05000382/LER-1985-014, :on 850415,reactor Protective Sys Automatically Actuated.Caused by Feedwater Pump Trip Due to Increase in Feedwater Pump Turbine Drain Tank Water Level.Operators Cautioned (← links)
- 05000382/LER-1985-015, :on 850322,during Release of Boric Acid Condensate Tank B,Valve Misalignment Resulted in No Process Flow Through Process Radiation Monitor PRM-IRE-0627. Operations Procedures Reviewed (← links)
- 05000382/LER-1992-014-01, :on 921029,determined That post-accident Remote Operation of RC-104 & Certain Components Not Environmentally Qualified Due to Inadequate Engineering Evaluation.Environ Status Will Be Reviewed (← links)
- 05000382/LER-1985-021, :on 850523,uncomplicated Reactor Trip & Emergency Feedwater Actuation Occurred Due to Low Water Levels in Steam Generators.Caused When Flow Perturbation in Condensate Sys Tripped Main Feedwater Pump (← links)
- 05000382/LER-1992-013-01, :on 920403,determined That SI-3291B Had Been Replaced W/Asme Class 3 Valve Instead of Required Class 1 Valve Due to Inadequate Maintenance Procedure.Valve Replaced (← links)
- 05000382/LER-1992-017-01, :on 921215,work Commenced to Adjust Packing on Normally Closed Containment Isolation Valve But Allowed Outage Time Expired W/Valve Still Inoperable.Caused by Inappropriate Action.Supervisor Debriefed (← links)
- 05000382/LER-1985-020, :on 850518,at 25% Power,Reactor Trip & Emergency Feedwater Actuation Signal Occurred.Caused by Low Water Level in Steam Generators.Sys Stabilized in Mode 3. Backwash Cycle Tested on 850520 (← links)
- 05000382/LER-1984-019, :on 850515,w/facility in Cold Shutdown, Personnel Discovered That Oxygen Sample Taken on 850514 from Isolated Rather than Inservice Gas Decay Tank.Review of Samples Showed All Chemicals within Tolerances (← links)
- 05000382/LER-1988-010, :on 880516 & 18,two Individuals Received Overexposure to Skin of Whole Body of 22.2 & 17.6 Rem.Caused by Personnel Error.Both Individuals Decontaminated & Hot Particle Control in Affected Areas Elevated (← links)
- 05000382/LER-1992-016-01, :on 921201,determined That Nitrogen Sys Valve Closed When Expected to Open.Caused by Weakness in Mechanism.Appropriate Components Will Be Properly Aligned After Completion of Maintenance (← links)
- 05000382/LER-1985-018, :on 850511,unidentified Leakage Noticed.Leak Originated in Packing Glands of Pressurizer Spray Valves RC-301A,B.Packing Glands Modified (← links)
- 05000382/LER-1992-015-01, :on 921125,confirmed That Previously Assumed post-accident Dose Rate at Manual Operators for Two Containment Isolation Valves Was Nonconservative.Caused by Incorrect Calculation.Shielding Installed (← links)
- 05000382/LER-1985-017, :on 850505,uncomplicated Reactor Trip Occurred. Caused by Inadvertent Closure of MSIV 2 Due to Pressure Transducer Malfunction & Back Leakage of Oil in Check Valve. Faulty Components Replaced (← links)
- 05000382/LER-1996-005-01, :on 960323,restricted Air Flow Rendered Wet Cooling Tower Fans Inoperable.Caused by Installation of Temporary Netting.Temporary Netting Removed & Personnel Counseled (← links)
- 05000382/LER-1996-010-01, :on 960807,discovered COLSS Not Monitoring Aztilt Due to Constants Not Being Loaded.Default Value for COLSS-CPS Tilt Limit Will Be Changed from 0.03 to 0.00 (← links)
- 05000382/LER-1985-013, :on 850404,feedwater Pump B Tripped on Low Suction Pressure.Caused by Broken Yoke.Flow Orifice Added to Recirculation Line in Order to Limit Condensate Bypass Flow to Condenser (← links)
- 05000382/LER-1996-009-01, :on 960725,failure of Containment Vacuum Relief Valves CVR-402A & CVR-402B Occurred.Caused by Excessive Roughness in Valve Body Bore.Valves Replaced & Retested (← links)
- 05000382/LER-1985-012, :on 850401,configuration of Fire Protection Sys in Fire Zone 27C of Reactor Auxiliary Bldg Found Not in Agreement W/Amend 36 to Fsar.Detector Installed Capable of Automatically Actuating Sprinkler Sys (← links)
- 05000382/LER-1985-011, :on 850321,several Samples of O & H Concentration in Gas Decay Tank Not Taken.Caused by Misunderstanding Between Personnel.Samples Subsequently Taken.Technicians Given New Instructions (← links)
- 05000382/LER-1985-010, :on 850321 & 22,unit Changed Modes After Two Reactor Trips W/Inoperable Hydrogen Analyzer & Subsequent Surveillance on ex-core Nuclear Instrumentation Not Performed.Caused by Loss of Feedwater Flow (← links)
- 05000382/LER-1985-009, :on 850320,containment Airlock Door Seal Leakage Test Not Performed within Time Frame Specified by Tech Specs.Cause Not Stated.Surveillance Performed. Containment Entry Times Posted (← links)
- 05000382/LER-1985-008, :on 850317 & 19,reactor Trip Occurred.Caused by High Water Level in Steam Generators.Emergency Operating Procedures,Emergency Entry Procedure & Uncomplicated Reactor Trip Recovery Performed (← links)
- 05000382/LER-1992-011, :on 920924,noted That CCW Sys Grab Sample Per TS Action Requirement Had Not Been Taken within Specified Periodicity,Due to Personnel Error.Processing of Permits Will Be Assigned Only to Plant Technicians (← links)
- 05000382/LER-1992-010-01, :on 920919,noncompliance W/Ts 3.1.2.9 Identified Due to Inadequate Procedure.Procedure OP-010-001, General Plant Operations Will Be Revised (← links)
- 05000382/LER-1996-008-01, :on 960606,loss of Charging Pump Flow Occurred. Caused by B & AB Charging Pump Relief Valves Lifting & Both Pumps Passing Flow Back to Suction of Pumps.Reset Relief Valve Set Point & Repaired Pulsation Dampener (← links)
- 05000382/LER-1992-008-01, :on 920726,inadvertent Esfa Occurred Due to Plant Protection Sys Test Circuit Malfunction.Cause Undetermined.Trouble Shooting Plan Developed to Isolate Specific Components to Resolve Problem (← links)
- 05000382/LER-1992-007-01, :on 920717,liquid Radiation Monitor High Alarm Setpoint Set Incorrectly Due to Personnel Error.Liquid Radwaste Release Permits Calculated Manually Now Require Supervisory Oversight Before Release (← links)
- 05000382/LER-1996-013-01, :on 960822,possible Operation in Excess of 100% Licensed Power.Cause Is Being Investigated (← links)
- 05000382/LER-1996-012-01, :on 951111,normally Locked Closed Valve Discovered 1.5 Turns Open.Caused by Equipment Failure. Closed & Repaired CS-118A to Ensure Ease of Operation.W/ (← links)
- 05000382/LER-1996-006-01, :on 960517,reactor Trip Occurred.Caused by Failed Component & Original Design Inadequacies.Replaced Both Motor/Generator (M/G) Set Overvoltage Relays & Replaced a M/G Set Voltage Regulator (← links)
- 05000382/LER-1996-007-01, :on 960411,discovered That Design Basis Flow Rates Could Not Be Achieved on Auxiliary Component Cooling Water Sys.Caused by Inadequate Design.Modified Sys Design & Reviewed Other safety-related Fluid Systems (← links)
- 05000382/LER-1985-004, :on 850209,inadvertent Reactor Trip Occurred. Caused by Low DNBR & High Local Power Density Trip in Channel a of Plant Protection Sys.Operations Personnel Performed Emergency Procedures (← links)
- 05000382/LER-1985-003, :on 850117,while Maint Personnel Troubleshooting Ground in ESF Actuation Signal Relay Cabinet B,Two Leads Shorted,Causing Momentary Loss of Relay Control Power.Pump & Bus Restored to Svc (← links)
- 05000382/LER-1985-002, :on 850117,four Automatic Actuations of ESF Portion of Control Room Ventilation Sys Occurred.Three of Four Actuations Caused by Electrical Spikes &/Or Spurious Actuation of Input Instrumentation (← links)
- 05000382/LER-1985-001, :on 850114,while in Mode 5,fire Protection Sprinkler in Reactor Auxiliary Bldg Ventilation Equipment Room Isolated W/O Establishing Continuous Fire Watch. Caused by Personnel Error (← links)
- 05000382/LER-1992-012-01, :on 921002,improperly Placed Electrical Jumper Caused Limited Number of ESF Actuation Relays to Deenergize, Due to Undetectable Error by Technician.Event Will Be Reviewed W/Electrical Personnel (← links)
- 05000382/LER-1992-009-01, :on 920827,broad-range Gas Detection Sys Channel Calibrs Not Performed within TS 4.3.3.7.3 Required Periodicity.Caused by Inadequate Administrative Control. Channel Calibrs Successfully Performed (← links)
- 05000382/LER-1984-002, :on 841226,surveillance Not Performed for 11 Fire Doors Since 841218.Four Addl Doors Found Unverified as Operable.Caused by Incorrect Rev to Procedure.Procedure Revised & Reviewed by Personnel (← links)
- 05000382/LER-1984-001, :on 841225,while in Mode 6,first of Five Automatic Actuations of Control Room Ventilation Sys Occurred.Caused by Electrical Spikes on Control Room Outside Air Intake Radiation Monitors.Signals Cleared (← links)
- 05000382/LER-1992-005-08, :on 920609,control Room Emergency Filtration Sys Started Automatically.Cause of Event Was Indeterminate. Technicians Will Continue to Monitor Radiation Monitor Performance During Operations (← links)
- 05000382/LER-1992-003, :on 920427,control Room Emergency Filtration Sys Started Automatically.Cause of Event Determined to Be Electric Spike.New resistor-capacitator Filters Have Been Installed (← links)
- 05000382/LER-1991-009, :on 910521,discovered That Safety Injection Tank 1A & 1B Inoperable Due to Relief Valve Malfunction. Precaution Will Be Added to NOCP-207,cautioning Scaffolders to Exercise Caution in Safety Injection Area (← links)
- 05000382/LER-1996-004-01, :on 960228,failed to Meet Intent of TS Surveillance Due to Inadequate Corrective Actions.Changed Design of ACCW Sys & Reviewed Surveillance Procedures for Unidentified Work Arounds (← links)
- 05000382/LER-1992-003-03, :on 920327,unplanned Actuation of ESF Portion of Control Room Ventilation Sys (CRVS) Occurred,Causing CRVS to Isolate.Cause Not Determined.New resistor-capacitor Filters Installed (← links)
- 05000382/LER-1992-002-01, :on 920325,unusual Event Declared Due to RCS Unidentified Leakage in Excess of TS Limit of 1 Gallon Per Minute.Caused by Failed Packing Gland Studs Due to Boric Acid Corrosion.Valve RC-104 Will Be Repaired (← links)
- 05000382/LER-1992-001, :on 920122,discovered That COLSS CPC Aztilt Limit Was Set Higher than CPC Aztilt Allowance Due to Inconsistency in Aztilt values.OP-004-006,Section 6.2,CPC Sys Being Revised (← links)
- 05000382/LER-1996-003-01, :on 960130,logarithmic Power Channels Indicated 5 Percent of Scale Below Actual Power.Caused by Not Periodically cross-correlating Log Power to Linear Power. Recalibrated Log Power Channels (← links)
- 05000382/LER-1996-002-01, :on 940206,component Inoperable in Excess of Time by LCO for TS to non-conservative Application of Ts. Change to OP-100-014 Initiated & Added Specific Guidelines (← links)
- 05000382/LER-1985-005, :on 850216 & 18,automatic Actuation of ESF Portion of Control Room Ventilation Sys Occurred.Caused by Air Intake Radiation Monitors Spiking High.Electrocubes Installed to Filter Noise Spikes (← links)
- 05000382/LER-1992-006-01, :on 920711,unidentified RCS Leakage Greater than TS 3.4.5.2 Limit of 1 Gpm Discovered.Caused by Failure of Temporary Leak Repair to Hot Leg Sample Valve.Valve Closed & Repaired by Sealant Injection (← links)
- 05000382/LER-2019-005-01, Automatic Reactor Scram Due to Steam Generator 1 High Level Resulting from a Main Turbine Trip and Subsequent Reactor Power Cutback Due to Failed Diode Modules with the Main Exciter (← links)
- 05000382/LER-1995-004-03, :on 950907,discovered Failure to Perform TS SR 4.3.3.6 for RG 1.97 Containment Isolation Valve Position Indicators Due to Inadequate Procedure.Procedure OP-903-013 Will Be Revised (← links)
- 05000382/LER-1996-001-02, :on 960111,entered TS 3.0.3 Due to SIT Levels Reading High.Cr Staff Immediately Lowered SIT Levels Until within Specified Ranges for Compliance W/Ts (← links)
- 05000382/LER-1992-004-02, :on 920424,failure to Implement TS Requirements Occurred Due to Inadequate Procedures.Changes to OP-903-115 Initiated (← links)
- 05000382/LER-1995-007-04, :on 950525,ECW Sys Flow Degradation Occurred Due to Iron Deposits Settling on Seats of Individual Room Cooler Chilled Water Manual Throttle Valves.Restored Chilled Water Flow to Established Design Conditions (← links)
- 05000382/LER-1995-006-04, :on 951207,failed to Provide Backup Overcurrent Protection Due to Personnel Error.Installed Backup Overcurrent Protection for Circuits & Tested Two Breakers (← links)
- 05000382/LER-1995-005-04, :on 951102,calibr Input Data for Rosemount Instrument Transmitters Was in Error.Caused by Ineffective Review Process for Instrument Calculations.Established Administrative Control for SIT Level Control (← links)
- 05000382/LER-1991-023, :on 911220,CC Valve Discovered Out of Position Due to Inadequate Position Indicator Labeling.Addl Operator Training on Proper Use of OP-100-009 Valves & Breakers Will Be Provided (← links)
- 05000382/LER-1991-008, :on 910517,unusual Event Declared Due to RCS Leakage from Pressurizer Spray Check Valve Being in Excess of TS Requirements.Caused by Underdeveloped Training on Pressure Seal Valve Installation (← links)
- 05000382/LER-1991-015, :on 910716,failure to Stroke BD-103B Occurred. Caused by Lack of Procedural Compliance.Shift Supervisor Debriefed Per Improving Human Performance Program (← links)
- 05000382/LER-1989-024, :on 891223,reactor Trip Occurred Due to Loss of Feedwater Flow to Steam Generator.Caused by Anomaly in MFRV Pneumatic Control Sys Aggravated by Cold Water.Ia Task Force Reassembled (← links)
- 05000382/LER-1991-022, :on 911117,reactor Trip Occurred on Loss of Power to Control Element Drive Mechanism Motor Generator Sets Due to Sias.Caused by Test Circuit Malfunction.Loose Connections Tightened (← links)
- 05000382/LER-1995-003-03, :on 950612,identified That as-found Set Pressures of Valves Outside of Allowable Tolerance.Cause Believed to Be Due to Inadequate Control of Variables in pre-installation Process.Procedure Revised (← links)
- 05000382/LER-1995-002-03, :on 950610,C Phase Lightning Arrestor on Substation Transformer & RT Occurred Due to Low Departure from Nucleate Boiling Ratio.Extinguished Fire & Placed Plant in Safe Condition (← links)
- 05000382/LER-1991-021-01, :on 911016,SI ILT 0311 & 0312 Level Detectors Indicated Erroneous Safety Injection Tank Levels.Caused by Leakage of Common Ref Leg Level Detectors.Sit 1A Level Was Increased,Ref Legs Filled & Valves Inspected (← links)
- 05000382/LER-1991-013, :on 910624,reactor Manually Tripped Due to High Water Level in Sg.Caused by Process Analog Control (Pac) Card in Valve Control Circuitry Failing.Pac Card Replaced.Pac Card Will Be Trended (← links)
- 05000382/LER-1991-013-02, :on 910624,manual Reactor Trip Occurred in Response to High Steam Generator Water Level.Caused by Failed Startup Feedwater Regulating Valve.Pac Card Replaced (← links)
- 05000382/LER-1991-012-01, :on 910621,EDG Declared Inoperable.Caused by Inadequate Attention to Detail.Control Room Supervisor Involved Debriefed on Event & Procedure Issued to Provide Addl Guidance on Tech Spec Compliance (← links)
- 05000382/LER-1991-019, :on 910825,reactor Trip Occurred on Loss of Power to Control Element Drive Mechanism Motor Generator Sets.Caused by Unforseen Design Problem.Mod Considered by Sys Engineering to Replace Pushbutton (← links)
- 05000382/LER-1995-001-02, :on 950406,inability to Perform Moderator Temp Coefficient Testing Due to Movement of Main Turbine Rotor After Startup from Refuel 6 Outage & Initial Mispositioning in Thrust Bearing.Stopped All Mtc Tests (← links)
- 05000382/LER-1990-019, :on 901212,both Trains of Control Room Air Conditioning Discovered Inoperable.Caused by Control Room Envelope.Surveillance Procedure PE-5-004, Control Room Air Conditioning Sys Surveillance, Revised (← links)
- 05000382/LER-1991-018, :on 891102,ASME Class 3 Wafer Disc Discovered to Have Been Inadvertently Installed in Containment Isolation Valve CC-710.Caused by Inadequate Procedure. Procedure Revised (← links)
- 05000382/LER-1991-017, :on 910808,water in Pressure Transmitter Sensing Lines Found.Caused by Inadequate Procedure.Procedure (OP)-009-008 Will Be Revised to Require Sensing Lines to Be Drained When Draining Safety Injection Tank (← links)
- 05000382/LER-1991-011, :on 910528,reactor Trip Occurred.Caused by Faulty Relay That Prevented Electrical Bus Transfer.Faulty Relay Replaced & Procedures Revised (← links)
- 05000382/LER-1991-010-01, :on 910526,automatic Reactor Trip Occurred Due to Plant Protection Sys Actuation During Annunciator Ground Isolation.Annunciator Cabinets Caution Tagged (← links)
- 05000382/LER-1991-008-01, :on 910517,reactor Coolant Sys Leakage Occurred in Excess of Tech Spec Requirements.Caused by Undeveloped Training on Pressure Seal Valve Installation.Submit Training Request to Train All Mechanical Personnel (← links)
- 05000382/LER-1994-016-01, :on 940721,informed by Cooper Energy Svcs (CES) That CES Could Not Locate Documentation to Prove That Lube Oil Flow to Cooper Model ET-18 Turbocharger Would Be Adequate Under Loss of Control Air (← links)
- 05000382/LER-1991-014-01, :on 910627,main Feed Isolation Valve Declared Inoperable.Caused by Accumulator Leak.Accumulators Recharged.Investigation for Future Mods in Progress (← links)
- 05000382/LER-1991-011-01, :on 910528,main Turbine Manually Tripped Due to Loss of Governor Control,Resulting in Automatic Reactor Trip.Caused by Faulty Relay Preventing Electrical Bus Transfer.Relay Replaced (← links)
- 05000382/LER-1991-009-01, :on 910521,safety Injection Tank 1A & 1B Declared Inoperable.Caused by Equipment Malfunction.Relief Valves for SIT 1A & 1B Later Removed,Tested & Returned to Svc (← links)
- 05000382/LER-1991-007-01, :on 910510,review of Calculation EC-E89-007 Revealed That Electronic Sensor Current Transformer Rating on 480-volt safety-related Bus Incorrect.Caused by Failure to Verify Amperage Rating.New Bus Installed (← links)
- 05000382/LER-1994-018-01, :on 941123,liquid Radwaste Released from Waste Condensate Tank a W/Incorrect & non-conservative Permit Release Setpoint on Liquid Waste Radiation Monitor.Caused by Human Error.Appropriate Personnel Counseled (← links)
- 05000382/LER-1994-017-01, :on 941122,load Rejection Testing Requirements for EDG Not Met Due to Inadequate Procedure Re Misunderstanding of 498 Kw HPSI Pump.Condition Rept (CR-94-1108) Was Generated (← links)
- 05000382/LER-1994-013-01, :on 940819,undesired Boron Dilution of Reactor Coolant Sys Occurred.Caused by Failure of BAM-146 to Function properly.BAM-146 Replaced & Increasing Operator Awareness on Reactivity Mgt Significance (← links)
- 05000382/LER-1991-016, :on 910720,identified Inaccurate Data from Auxiliary Protection Cabinet Multiplexer to Plant Monitoring Computer.Caused by Inability of Plant Monitoring Computer to Identify non-updated Data (← links)
- 05000382/LER-1990-004-01, :on 900408,partial Actuation of Emergency Feedwater Sys Occurred During Scheduled Functional Test of Pps.Caused by Test Circuit Malfunction.Matrix Test Module Relay Hold Pushbutton Assembly Replaced (← links)
- 05000382/LER-1991-005-01, :on 910505,shutdown Cooling Sys Malfunction Occurred on Operating Train B & Shutdown Cooling Train B Discovered Air Bound.Caused by Ineffective Work Controls. Administrative Controls Will Be Expanded (← links)
- 05000382/LER-1994-015-01, :on 940916,boric Acid Addition to RCS Occurred. Caused by Personnel Error Due to Lack of Self Checking. Primary Nuclear Plant Operator Counseled Re Improving Human Performance Program (← links)
- 05000382/LER-1994-014-01, :on 941006,HLIV Circuit Breaker Left in Open Position Due to Personnel Error.Cognizant CRS Has Been Counseled in Accordance W/Waterford 3 Improving Human Performance Program (← links)
- 05000382/LER-1991-004-01, :on 910404,acceptance Criteria for TS Surveillance OP-903-099, Spent Fuel Handling Machine Operability Not Completed within 72 H.Caused by Inadequate Attention to Details.Individuals Counseled (← links)
- 05000382/LER-1994-011-01, :on 940720,addition of Improper Blend of Makeup Water to VCT Caused RCS Temp to Rise & Reactor Power to Increased.Caused by Personnel Error.Personnel Involved in Event Counseled (← links)
- 05000382/LER-1994-010-01, :on 940607,purge of Letdown RM Resulted in Inadvertent Boron Dilution in RCS Due to Inadequate Review of Station Mod Package (SMP-1817) Which Installed Subj Rm. Danger Tag Placed on Valve PMU-120 (← links)
- 05000382/LER-1991-003-01, :on 861126,improper Testing of Main Steam Safety Valves Noted.Caused by Incorrect Vendor Supplied Data & Procedural Inadequacy.Procedure MM-007-015 Revised & Other Surveillance Procedures Reviewed (← links)
- 05000382/LER-1991-002-01, :on 910221,inadvertent Control Room Outside Air Isolation Due to Equipment Malfunction.Beta Radiation Window Light Was Replaced & Returned to Svc (← links)
- 05000382/LER-1991-001-03, :on 910203,steam Generator 2 Low Pressure Setpoint Determined to Be Out of Tolerance & Channel B Not Placed in Bypassed or Tripped Condition within 1 H.Caused by Personnel Error.Personnel Counseled (← links)
- 05000382/LER-1994-008, :on 940503,circuitry Problem Re Response Times of Temp Controllers & Time Delay Relays for ESF Filtration Unit Heaters.Caused by Personnel Missing Opportunities to Promptly Identify ESF Performance (← links)
- 05000382/LER-1990-018-03, :on 901206,discovered That Shutdown Cooling Sys Suction Line Relief Valves Not Demonstrated Operable Since Issuance of OL on 841218.Caused by Overlooking Configuration Since TS Written.Ts Change Will Be Sent (← links)
- 05000382/LER-1994-009-01, :on 940218,SRO Discovered Object Hanging from Spent Fuel Handling Machine.Caused by Inadequate Barriers. Power Strip to Computer Deengergized (← links)
- 05000382/LER-1994-007, :on 940426,automatic Reactor Trip Occurred Due to Low Pressurizer Pressure Core Protection Calculator Auxiliary Trip.Corrective Action:Replacing Faulty Relay & Removing Reactor Power System from Service (← links)
- 05000382/LER-1990-020-03, :on 901227,chlorine Gas Released from Local Chemical Plant.Alert Declared.Toxic Chemical Release & Emergency Procedures Entered.Event Voluntarily Reported.W/ (← links)
- 05000382/LER-1990-019-02, :on 901212,Tech Spec LCO 3.0.3 Entered When Both Trains of Control Room HVAC Sys Declared Inoperable Due to Breach in Control Room Envelope.Caused by Insufficient Documentation & Details of Boundary Seals (← links)
- 05000382/LER-1990-017-01, :on 901116,missed Diesel Fuel Oil Sample Due to Not Following Required Procedure.Addl Sample Drawn to Support Investigation of New Diesel Fuel Oil Analysis.W/ (← links)
- 05000382/LER-1994-004-01, :on 940307,degraded CCW HX Discovered While Shutdown Due to Biological Fouling.Ccw HXs a & B Cleaned.W/ (← links)
- 05000382/LER-1994-003-01, :on 940305,discovered Reactor Protection Inoperable Due to Missed Surveillances.Caused by Omission of Relevant Info from Procedures.Procedures Revised & Personnel Debriefed (← links)
- 05000382/LER-1994-002-01, :on 840808,determined That Five Radioactive Sources Had Not Been Leak Tested.Caused by Programmatic Deficiency.Radioactive Sealed Sources Leak Tested (← links)
- 05000382/LER-1990-011, :on 900721,ESF Control Room Ventilation Actuations Occurred Due to Equipment Malfunction.Cause Under Investigation.Insp of Radiation Monitor Performed (← links)
- 05000382/LER-1994-001-02, :on 940118,discovered That Component Cooling Water Valves Open Approx 30% Due to Lack of Work Instructions.Valve Operators for Affected Valves Adjusted to Close Valves & Valves Locked Closed (← links)
- 05000382/LER-1993-009-01, :on 931115,PSV Setpoint Found Out of Tolorance Due to Errors Introduced When Establishing Setpoints.Safety Valve Test Procedures Revised & Evaluation of Changes to TS Expected to Be Completed by 940727 (← links)
- 05000382/LER-1993-011-02, :on 931220,determined That Two of Three Lea Position Indications Inoperable Since 931219 Due to Weak man-machine Interface.Enhancement to Plant Monitoring Computer CEA Processing Will Be Made (← links)
- 05000382/LER-1993-010-01, :on 931218,discovered That Performance of Action for Ceac Being Out of Service Late.Caused by Inadequate Attention to Detail.Conducted Required Action & Debrief Parties Involved (← links)
- 05000382/LER-1990-003-01, :on 900329,reactor Trip Occurred Due to Grid Disturbance.Caused by Severe Grid Voltage Transient on 230 Kv Sys.Util Investigating Protective Relay Performance of Industrial Loop & Maint Procedures (← links)
- 05000382/LER-1993-005-01, :on 931007,discovered That Motor Pinion Gear Keys SDC Valves Not Staked Due to Inadequate Procedure.Two Motor Pinion Gear Keys Staked.Appropriate Procedures Will Be Revised (← links)
- 05000382/LER-1993-008-01, :on 931208,TS 3.0.3 Was Entered Due to Chiller a Tripping When Loose Connection Caused Chilled Water Pump a to Trip on Motor Overloads.Replaced B Overload Block for Chilled Water Pump a (← links)
- 05000382/LER-1993-007-01, :on 931207,discovered That Chemistry Samples Were Not Analyzed Due to Procedural non-compliance.Trained & Counseled Responsible Technician (← links)
- 05000382/LER-1993-004-01, :on 930913,discovered That Containment Spray Isolation Valve Failed to Open Following an ESFAS Subgroup Relay Surveillance.Caused by Valve Degradation.C/As Included Installation of Addl Vent Valves on a Train (← links)
- 05000382/LER-1990-008-01, :on 900703,Tech Spec 3.0.3 Entered Due to Svcs Chill Water Trains Being Declared Inoperable.Caused by Reduction of Chill Water Loads Following Dropped Control Element Assembly.Event Discussed W/Personnel (← links)
- 05000382/LER-1990-015, :on 900929,inadvertent Control Room Ventilation Actuation Occurred Due to Equipment Malfunction (← links)
- 05000382/LER-1990-014-01, :on 900922,control Room Outside Air Isolation Due to Procedural Inadequacy (← links)
- 05000382/LER-1993-006-02, :on 931019,UHS & WCT Water Basins Less than 97% Full.Caused by Failure to Follow Procedure.Logs Revised to Indicate DWST Level Should Be Maintained Higher than Piping Logs (← links)
- 05000382/LER-1990-009, :on 900606,missed Monthly & Quarterly Composite Analysis Occurred Due to Personnel Error.Technician Failed to Store Sample in Proper Location & Sample Subsequently Discarded.Procedure for Samples Developed (← links)
- 05000382/LER-1993-002-01, :on 930615,reactor Tripped Due to High SG Level Caused by Failure of Feedwater Control Sys.Caused by Failure of Square Root Extractor in Feedwater Flow Circuit.Failed Components Replaced & Alarm Setpoints Reviewed (← links)
- 05000382/LER-1990-006, :on 841218.determined That Shutdown Cooling Sys Relief Valve Setpoint Not Set,Per Tech Spec Requirement. Caused by Procedural Inadequacy.Procedure MM-007-006 Revised (← links)
- 05000382/LER-1990-005, :on 900420,condenser Vacuum Pump Discharge Wide Range Gas Monitor Setpoint Discovered to Be Incorrect.Caused by Inadequate Change Procedure for Data Base Manual. Administrative Procedures Revised (← links)
- 05000382/LER-1990-004, :on 900408,partial Actuation of Emergency Feedwater Sys Occurred During Scheduled Test of Plant Protection Sys.Caused by Test Circuit Malfunction.Relay Hold Pushbutton Assembly Replaced (← links)
- 05000382/LER-1992-019-01, :on 920327,indicated That Actual RCS Boron Concentration Below Required Concentration.Caused by Inadequate Procedure Guidance.C/A Included Procedure Changes to Account for Training of Personnel (← links)
- 05000382/LER-1993-001-03, :on 930304,reactor Trip Occurred as Result of Two Nearly Simultaneous Power Supply Failures.Caused by age- Related Degradation of Frequency Detection Card.Cards Replaced & Updated Power Supply Installed (← links)
- 05000382/LER-1993-001, Forwards Corrected LER 93-001-00,superseding LER W/Same Number Dtd 930401.Reporting Requirement in Block 11 Marked Incorrectly in Original Rept (← links)
- 05000382/LER-1990-003, :on 900329,severe Transient on 230-KV Power Distribution Grid Resulted in Reactor Trip & Bus Tie Breaker B Opened Automatically,Deenergizing Safety Bus B.Caused by Grid Fault.Calibr Data Reviewed (← links)
- 05000382/LER-1990-002, :on 900322,reactor Trip Initiated by Plant Protection Sys When Two Control Element Assemblies Dropped to Fully Inserted Position.Caused by Connectors Damaged from Misalignment.Damaged Components Replaced (← links)
- 05000382/LER-1994-005-01, :on 940415,dicovered That Several Valves Were Not Being Tested Per Requirements of ASME Section Xi.Caused by Inappropriate Action.Corrective Action:Pump & Valve Team Has Been Formed to Perform in Depth Reviews (← links)
- 05000382/LER-1994-006, :on 940415,determined That on 921103, Unidentified RCS Leak Rate of Greater than 1 Gpm Occurred. Caused by Error in RCS Mass Balance Equation.Approved Temporary Change to Procedure OP-903-024 (← links)
- 05000382/LER-1990-013-01, :on 900903,unsampled Gas Released from Gaseous Waste Mgt Sys.Caused by Internal Leakage Past Discharge Isolation Valves.Administrative Controls in Place to Ensure That Gas Decay Tanks Sampled Prior to Release (← links)
- 05000382/LER-1990-012-01, :on 900825,reactor Tripped Due to Lightning Strike.Station Mod Request Issued to Provide Uninterruptable Power Source for Steam Bypass Control Sys (← links)
- 05000382/LER-1994-012-01, :on 940907,discovered Failure to Perform TS Surveillance Requirements.Caused by Misunderstanding & Inadequate Technical Reviews.Ts Bases for 3/4.8.1 Will Be Revised (← links)
- 05000382/LER-1990-001, :on 900223,discovered Controlled Ventilation Area Sys Airlock Doors D-170 & D-171 Open.Caused by Inadequate Administrative Controls.Procedural Instructions Will Be Developed (← links)
- 05000382/LER-1989-021, :on 891116,emergency Diesel Generator a Declared Inoperable When Essential Svcs Chiller a Declared Inoperable W/O Verifying Availability of Offsite Ac Power. Caused by Personnel Error.Supervisor Counseled (← links)
- 05000382/LER-1989-022, :on 891128,plant Operated in Condition Prohibited by Tech Specs When Emergency Diesel Generator a Inoperable More than 24 H.Caused by Personnel Error.Ltr Issued to All Shift Supervisors (← links)
- 05000382/LER-1989-023, :on 890927,MSIV 2MS-124B,determined to Have Broken Stem.Caused by MSIV Hydraulic Control Unit Thermal Valve Leakage.Replacement MSIV Stems W/Increased Blend Radius Designed to Decrease Stress Installed (← links)
- 05000382/LER-1989-020, :on 891031,containment Fan Cooler C Motor Ran in Reverse Direction Reducing Air Flow & Cooling Capacity. Caused by Personnel Not Performing Surveillance Testing. Motor Rewired for Correct Slow Speed Operation (← links)
- 05000382/LER-1989-002-01, Forwards LER 89-002-01.Submittal of LER Delayed from 891109 Due to Extenuating Circumstances (← links)
- 05000382/LER-1989-018, :on 890921,while Testing Main Steam Safety Valve,Lift Pressure Found to Be Below Tech Spec Allowable Value.Caused by Error in Judgement by Plant Supervisors. Event Will Be Discussed by Superintendent (← links)
- 05000382/LER-1989-019, :on 891012,4.16-kV Bus 3A2 Metering Potential Transformer Fuse Door Inadvertently Opened,Causing Feeder Breaker & Supply Breaker to Open & Load Sequencer to Reset. Caused by Personnel Error.Drawers Relabeled (← links)
- 05000382/LER-2019-007, (Waterford 3), Plant Shutdown Required by Technical Specifications Due to Charging Pump Suction Line Flaw (← links)
- 05000382/LER-2019-006, (Waterford 3), Unplanned Loss of Both Trains of Broad Range Gas Monitors Results in a Condition That Could Have Prevented Fulfillment of a Safety Function (← links)
- 05000382/LER-2019-005, Automatic Reactor Scram Due to Steam Generator 1 High Level Resulting from a Main Turbine Trip and Subsequent Reactor Power Cutback Due to Failed Diode Modules within the the Main Exciter (← links)
- 05000382/LER-2019-003, Relevant Indications Identified in Reactor Coolant Pump 1A and 2A Suction Drain Nozzle Dissimilar Metal Welds Resulting in the Condition of the Nuclear Power Plant, Including Its Principal Safety Barriers, Being (← links)
- 05000382/LER-2019-002, (Waterford 3), Control Room Envelope Declared Inoperable Due to Outside Air Intake Isolation Valve Exceeding Closed Stroke Time During Inservice Testing Resulting in Event or Condition (← links)
- 05000382/LER-2019-001, Past Inoperability of Effluent Accident Monitor Exceeds Allowed Outage Time Resulting in Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2018-002, Unplanned Loss of a Train of Control Room Outside Air Intake Radiation Monitors Results in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2018-001, For Waterford Unit 3 Regarding Failure to Enter Limiting Condition of Operation Action Statement Due to Lack of Procedure Guidance Results in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-1917-002, Regarding Automatic Reactor Scram Due to the Failure of Fast Bus Transfer Relays to Automatically Transfer Station Loads to Off-Site Power on a Main Generator Trip (← links)
- 05000382/LER-1917-001, Regarding Both Trains of Emergency Core Cooling System Inoperable Due to Inadvertently Performing Maintenance on Train B Resulting in Event or Condition That Could Have Prevented Fulfillment of a Safety Function (← links)
- 05000382/LER-2015-007-01, Both Emergency Diesel Generators Declared Inoperable (← links)
- 05000382/LER-2016-002, Regarding Both Trains of Essential Services Chilled Water Inoperable Due to Failing to Maintain Exiting Chilled Water Temperature in Specification Resulting in Event or Condition That Could Have Prevented (← links)
- 05000382/LER-2016-001, Regarding Incorrect Core Protection Calculator Addressable Constant Entered Because of Inadequate Procedure Resulting in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2015-004-02, Regarding Inoperability of the Emergency Feedwater Actuation System, Emergency Feedwater (EFW) System, and Atmospheric Dump Valves Due to Improper Configuration of the EFW System Flow Control System (← links)
- 05000382/LER-2015-008, Regarding Automatic Reactor Trip Due to Failed Circuit Card in Control Element Assembly Calculator 2 (← links)
- 05000382/LER-2015-007, Regarding Both Emergency Diesel Generators Declared Inoperable (← links)
- 05000382/LER-2015-004-01, Forwards LER 15-004-01 for Waterford 3, Regarding Emergency Feedwater System Flow Oscillations and LER 15-005-01 Regarding Manual Reactor Trip Due to Low Steam Generator Levels (← links)
- 05000382/LER-2015-006, Regarding Void Discovered in Low Pressure Safety Injection System Piping (← links)
- 05000382/LER-2015-005, Regarding Emergency Feedwater System Flow Oscillations and LER 15-005-00 Regarding Manual Reactor Trip Due to Low Steam Generator Levels (← links)
- 05000382/LER-2014-004, Regarding Emergency Diesel Generators Rendered Inoperable by Potential Water Intrusion Into Diesel Fuel Oil Feed Tanks (← links)
- 05000382/LER-2014-002, Regarding Inadequate Tightening of Starting Air Filter Housing Results in Inoperable Train a Emergency Diesel Generator (← links)
- 05000382/LER-2014-001, Regarding Room Cooler Breaker Inoperability Causes Past Inoperability of Containment Spray System Train (← links)
- 05000382/LER-2013-007, Regarding Technical Specification 3.9.7 Violation, Load Over Irradiated Fuel During Dry Fuel Storage Activities (← links)
- 05000382/LER-2013-006, Regarding Failure of Credited Operator for Air Operated Valve Causes Train Past Inoperability (← links)
- 05000382/LER-2013-005, Re Emergency Diesel Generator Inoperable Due to Room Exhaust Fan Failure (← links)
- 05000382/LER-2013-004, Regarding Tech Spec Violation During Operation in Lower Mode with Reduced Channels of Excore Nuclear Instrumentation (← links)
- 05000382/LER-2013-003, Regarding Failure to Test Manual Handwheels on Air Operated Valves (← links)
- 05000382/LER-2013-002, Regarding Emergency Feedwater System Flow Control Valve Fails to Close Due to Valve Positioner Failure (← links)
- 05000382/LER-2013-001, Main Feedwater Regulating Valve Closure Results in Automatic Reactor Trip (← links)
- 05000382/LER-2012-007, Regarding Inoperability of a Safety Related Valve Due to Backup Air Accumulator Leakage (← links)
- 05000382/LER-2012-005, Regarding Calibration Drift of I/P Transducer Causes Inoperability of Safety Related System (← links)
- 05000382/LER-2012-004, Regarding Essential Chiller Oil Leak Creates Unanalyzed Past Operability Condition (← links)
- 05000382/LER-2012-003, Regarding Cracked Instrument Line Affects Fire Protection Safe Shutdown Analysis (← links)
- 05000382/LER-2012-002, Regarding Failed Valve Actuator Diaphragm Causes Inoperability Greater than Allowed by TS LCO Action (← links)
- 05000382/LER-2012-001, Regarding Technical Specification for Containment Fan Cooler Minimum Cooling Flow Not Met (← links)
- 05000382/LER-2011-005, Regarding a Malfunction of the Essential Chilled Water Loop B (← links)
- 05000382/LER-2011-004, Regarding Vendor Notification of Non-Conforming Part Renders Both Trains of QSPDS Inoperable (← links)
- 05000382/LER-2011-003, Regarding Emergency Diesel Generator Output Breaker Failed to Automatically Close During Surveillance Testing (← links)
- 05000382/LER-2011-002, Regarding Main Feedwater Isolation Valve a Failed Surveillance Requirement (← links)
- 05000382/LER-2011-001, Regarding Waste Gas System Oxygen Exceeded Technical Specification Allowed Duration (← links)
- 05000382/LER-2010-003, Regarding Worn Fuel Oil Line on a Train Emergency Diesel Generator Caused by Inadequate Mounting Clamp (← links)
- 05000382/LER-2010-002, For Waterford 3, Regarding Main Feedwater Isolation Valve B Exceeded Allowed Outage Time Due to Tubing Connection Failure (← links)
- 05000382/LER-2009-006, For Waterford 3, Regarding Degraded Hydraulic Fluid Causes Both Main Feedwater Isolation Valves to Fail Inservice Test Stroke (← links)
- 05000382/LER-2010-001, For Waterford 3 Steam Electric Station, Regarding Spent Fuel Pool Cooling Single Failure (← links)
- 05000382/LER-2009-005, For Waterford 3 Steam Electric Station, Unit 3, Regarding Spurious Moisture Separator Reheater Relief Valve Opening Resulting in a Manual Reactor Trip and an Engineering Safety Feature Actuation (Emergency Feedwater Actuation) (← links)
- 05000382/LER-2009-004, Regarding Condition Prohibited by Technical Specification with Log Power Channel Inoperable (← links)
- 05000382/LER-2009-003, Regarding Multiple Tyco Relay Failures (← links)
- 05000382/LER-2009-002, Regarding Voluntary Report: Shortened Service Life of Station Battery B Due to Manufacturing Impurities (← links)
- 05000382/LER-2009-001, Regarding 3.0.4 Violation: Mode Change with an Inoperable Emergency Feedwater Pump (← links)
- 05000382/LER-2008-004, Loose Intercell Connecting Bolts on 125 Vdc Station Battery (← links)
- 05000382/LER-2008-003, Regarding Movement of Fuel Assembly in Reactor Vessel with Fuel Handling Machine Inoperable (← links)
- 05000382/LER-2008-002, Regarding Inoperable Steam Generator Narrow Range Level Channels (← links)
- 05000382/LER-2008-001, Mispositioned Essential Chiller AB Return Header B Isolation Valve (← links)
- 05000382/LER-2006-001, Re Potential for Loss of Both Trains of Safe Shutdown Equipment from Damage Due to Fire (← links)
- 05000382/LER-2005-005, Re Manual Reactor Trip Upon Loss of All Circulating Water Pumps and Lowering Condenser Vacuum (← links)
- 05000382/LER-2005-004, Re Details of the Loss of Offsite Power During Hurricane Katrina (← links)
- 05000382/LER-2005-003, Re TS Minimum Volume Requirement in DG Fuel Oil Storage Tank B Not Met Due to Bent Transmitter Tubing (← links)
- 05000382/LER-2005-002, Re Failure of One System of RCS Leakage Detection Instrumentation Due to Latent Human Error (← links)
- 05000382/LER-2005-001, Regarding RCS Pressure Boundary Leakage Due to Primary Water Stress Corrosion Cracking of a Pressurizer Heater Sleeve (← links)
- 05000382/LER-2004-004, Failure to Adequately Size Containment Electrical Penetration Over-Current Protection Devices Due to Latent Personnel Error (← links)
- 05000382/LER-2004-003, Ses Regarding 10CFR50.46 Acceptance Criteria Exceeded for Small Break Loss of Coolant Accident Analysis (← links)
- 05000382/LER-2004-001, Regarding Failure to Provide Backup Over-Current Protection Due to Personnel Error (← links)
- 05000382/LER-2003-003, Regarding RCS Pressure Boundary Leakage Due to Primary Water Stress Corrosion Cracking (PWSCC) (← links)
- 05000382/LER-2003-002, Regarding Failure of Emergency Diesel Generator a Fuel Oil Line (← links)
- 05000382/LER-2003-001, Regarding Loose Breaker Fuse Rendered One Bank of Pressurizer Proportional Heaters Inoperable (← links)
- 05000382/LER-2002-004, From Waterford 3 Regarding Withdrawal of Licensee Event Report 2002-004-00 (← links)
- 05000382/LER-2002-006, Possible Operation in Excess of 100% Licensed Power Limit Due to Instrumentation Biases (← links)
- 05000382/LER-2002-005, Ses Re Temporary Inability to Achieve Cold Shutdown with Both Trains of Shutdown Cooling Inoperable (← links)
- 05000382/LER-2002-003, Re Inoperable Auxiliary Component Cooling Water Pump Due to Lack of Lubrication (← links)
- 05000382/LER-2002-001, Re Shield Building and Controlled Ventilation Area Systems Inoperable Due to Maintenance Activities (← links)
- 05000382/LER-2002-002, Re Reactor Trip Circuit Breakers Rendered Inoperable During Response Time Testing (← links)
- 05000382/LER-2025-002, Auxiliary Pressurizer Spray Train Inoperable Resulting in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2025-001, Inoperability of Startup Transformer a Results in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2025-003, Auxiliary Component Cooling Water Train Inoperable Resulting in a Condition Prohibited by Technical Specifications (← links)
- 05000382/LER-2024-004-01, Automatic Reactor Trip Due to Lightning Strike (← links)