Pages that link to "05000528/LER-2025-001, Unit 1 Loss of High Pressure Safety Injection Safety Function"
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The following pages link to 05000528/LER-2025-001, Unit 1 Loss of High Pressure Safety Injection Safety Function:
Displayed 3 items.
- Licensee Event Report (← links)
- ML25142A400 (redirect page) (← links)
- 05000528/LER-2025-001 (redirect page) (← links)
- 05000528/LER-2016-003 (← links)
- 05000528/LER-2007-006 (← links)
- 05000528/LER-2001-004 (← links)
- 05000528/LER-2001-003 (← links)
- 05000528/LER-2001-002 (← links)
- 05000528/LER-2001-001 (← links)
- 05000528/LER-1985-068, Corrected LER 85-068-00:on 851020,discovered That Four Valves Not Tested within Required Quarterly Surveillance Interval by 851018.Caused by Ineffective Communication Between Nonlicensed Personnel (← links)
- 05000528/LER-1986-063, Suppl to LER 86-063-00:on 850912,reactor Tripped Due to Core Protection Calculators Sensing Imminent Loss of Forced Coolant Circulation.Ref Leg of Vol Control Tank Level Indicator Monitored on Daily Basis (← links)
- 05000528/LER-1985-048, Corrected LER 85-048-00:on 850819,ECCS Subsystem RQ & Bp Declared Inoperable Due to Noncompliance W/Surveillance Requirement 4.5.2.g.1.Temporary Change Initiated to Permit Testing of ECCS Throttle Valves (← links)
- 05000528/LER-1986-009, Corrected Ltr Revising Util Tracking Number Forwarding LER 86-009-00 Re Failure to Isolate Waste Gas Holdup Sys (← links)
- 05000528/LER-2023-003, Control Room Essential Filtration Actuation Signal (CREFAS) Actuation with Essential Spray Pond Pump Start (← links)
- 05000528/LER-2023-001-02, Reactor Trip Following a Main Turbine Trip (← links)
- 05000528/LER-2023-002, Reactor Coolant System Degraded Pressure Boundary (← links)
- 05000528/LER-2023-001-01, Reactor Trip Following a Main Turbine Trip (← links)
- 05000528/LER-2023-001, Reactor Trip Following a Main Turbine Trip (← links)
- 05000528/LER-2022-001, Emergency Diesel Generator Actuation on Loss of Offsite Power to Class 4.16 Kv Buses (← links)
- 05000528/LER-2021-001-01, Unit 1 and 3 Emergency Diesel Generator Actuation on Loss of Offsite Power to Class 4.16 Kv Buses (← links)
- 05000528/LER-2021-001, Emergency Diesel Generator Actuation on Loss of Offsite Power to Class 4.16 Kv Bus (← links)
- 05000528/LER-1989-012, :on 890510,determined That Emergency Lighting Did Not Meet Design Bases or 10CFR50 App R Requirements. Cause Under Investigation.Emergency Lighting Will Be Installed &/Or Modified Prior to Restart (← links)
- 05000528/LER-1986-052, :on 860905,discovered Reactor Protection Sys Channel B Reactor Coolant Low Flow Trip Setpoint Set Nonconservatively.Caused by Personnel Error.Disciplinary Action Taken & Procedures Changed (← links)
- 05000528/LER-1985-005-01, Corrected LER 85-005-01:on 860210,automatic Actuation of Control Room Essential Filtration Actuation Signal Occurred. Caused by Spurious Auxiliary Equipment Failure Alarm.Safety Evaluation Performed (← links)
- 05000528/LER-1986-054, :on 860914,Limiting Condition for Operation 3.0.3 Entered Due to Inoperable Msiv.Caused by Inconsistent Tech Specs.Tech Spec Rev to Allow Testing W/O Inoperability Condition Will Be Pursued (← links)
- 05000528/LER-1986-055, :on 861106,Surveillance Test 36ST-9SA02 Identified as Incomplete,Per Tech Spec 4.0.2.Caused by Inability to Position Control Room Intake Damper Due to Actuator Malfunction.Actuator Adjusted (← links)
- 05000528/LER-1986-044, :on 860902,automatic Reactor Protection Sys Actuation Initiated Reactor Trip.Caused by Spurious Low Reactor Coolant Flow (Lrcf) Trip on Channels B & D on Steam Generator 2.LCRF Trip Setpoints Evaluated (← links)
- 05000528/LER-1986-050, :on 861101,accumulators of MSIV Found Below Min Pressure Required for Operability.Limiting Condition for Operation 3.0.3 Entered.Caused by Personnel Error.Documents Generated to Verify Oil Levels in MSIV (← links)
- 05000528/LER-1986-003-01, :on 860806,Units 1 & 2 Reactors Tripped at 100% & 7%,respectively,on Low Flow Projected DNBR Trip Signals from Core Protection Calculators.Caused by Faulty Current Transformer.Similar Transformers Tested (← links)
- 05000528/LER-1986-047, :on 860712,reactor Tripped at 100% Power on Low Reactor Coolant Flow Signal in Steam Generator 2.Caused by 860522 Reduction in Trip Setpoints for Low Reactor Flow. New Trip Setpoints Being Evaluated (← links)
- 05000528/LER-1986-049, :on 860710,inadvertent Automatic Actuation of Fuel Bldg Essential Ventilation Actuation Signal Train a Occurred.Caused by Personnel Error.Technician Counseled. Instructions Revised Re Parameter Changes (← links)
- 05000528/LER-1986-011, :on 860217,noble Gas Grab Sample for Condenser Air Removal Effluent Monitor Taken Over 4 H Late,In Violation of Tech Spec 3.3.3.9.Caused by Personnel Error. Personnel Counseled & Sample Obtained (← links)
- 05000528/LER-1986-004-01, :on 860128,pressurizer Pressure Raised Above 430 Psia W/O Removing Power to key-locked Open Safety Injection Tank Isolation Valves.Caused by Ambiguous Info in Tech Specs.Procedures & Tech Specs Revised (← links)
- 05000528/LER-1986-056, :on 861006,reactor Tripped on Low DNBR Signals from Core Protection Calculators.Caused by Quick Opening of Steam Generator 1 Economizer Valve.Troubleshooting of Valve Conducted & Valve Operation Evaluated (← links)
- 05000528/LER-1986-031, :on 860801,two Independent Control Room Essential Filtration Sys Determined Inoperable Due to Unqualified Activated Carbon Absorbent.Caused by Personnel Error.Tech Specs Revised to Ref Correct Std (← links)
- 05000528/LER-1986-062, :on 870211,discovered That Max Surveillance Interval for Monthly Functional Test of Plant Protection Sys (36ST-9SB02) Exceeded on 860222.Caused by Communication Error.Surveillance Program Enhanced (← links)
- 05000528/LER-1986-061, :on 861119,automatic Actuation of Plant Protection Sys Initiated in Steam Generator 1.Caused by Personnel Error Complicated by Malfunction of Steam Generator 1 Level Channel (← links)
- 05000528/LER-1986-060, :on 861114,annunciator Alarm SG Isol VLV Trbl Annunciated in Control Room.Caused by Low Air Pressure in MSIV SG-UV-171.Train Air Reservoir B Repressurized (← links)
- 05000528/LER-1986-039, :on 860525 & 0603,accumulators B & a, Respectively Discovered Leaking Nitrogen.Caused by Personnel Error in Form of Incorrect Engineering Evaluation.Engineer Counseled (← links)
- 05000528/LER-1986-058, :on 870123,discovered That on 861202 Four Consecutive Daily Radiation Monitor Channel Checks Not Correctly Performed.Caused by Personnel Error.Radiation Protection Technician Terminated (← links)
- 05000528/LER-1986-035, :on 860522,discovered That Two Valve Retests Not Performed on 860513.Caused by Personnel Error.Night Order Will Be Written to Advise Control Room Personnel to Ensure That Work Order Properly Closed Out (← links)
- 05000528/LER-1987-007, :on 870120,Tech Spec 3.3.2,Table 3.3-3 Requirement Not Met.Caused by Entry Into Limiting Condition for Operation 3.0.3 to Avoid ESF Actuation.Tech Spec Change Request to Allow Trip in Mode 4 Initiated (← links)
- 05000528/LER-1996-009, :on 961027,identified That TS Violation May Have Occurred Due to Missed Surveillance Test.Caused by Personnel Error.Setpoint for Limit Switches for Valve 1SIAUV647 Corrected to Achieve 1-inch Stroke Length (← links)
- 05000528/LER-1986-053, :on 860911,reactor Tripped on Low Steam Generator Pressure.Caused by Procedural Inadequacy Re Use of Circuit Card Extender Board During Maint.Notice Distributed & Procedures Revised (← links)
- 05000528/LER-1986-048-01, :on 860902,Limiting Condition for Operation 3.0.3 Entered Due to Inoperable MSIV Accumulators a & B. Caused by Oil Returning to Reservoir.Tech Spec Change Pursued (← links)
- 05000528/LER-1987-003, :on 870110,reactor Power Cutback Occurred Due to Load Rejection Resulting in Reactor Trip.Caused by Cognitive Personnel Error.Night Order Issued to Discuss Desirable Strategy During Feedwater Transient (← links)
- 05000528/LER-1986-045-01, :on 860815,automatic Actuation of Reactor Protection Sys Initiated Automatic Reactor Trip Due to Manual Generator/Turbine Trip.Caused by Malfunction of nonsafety-related Steam Bypass Control Valves (← links)
- 05000528/LER-1987-010, :on 870325,while in Mode 1,discovered That Daily Chemistry Samples Not Taken on 870323 for Turbine Bldg & Condenser Area Sumps.Caused by Personnel Error.Briefing Sessions Held W/Workers.Sample Form Developed (← links)
- 05000528/LER-1987-001, :on 870203,control Room Essential Filtration Actuation Signal Actuated on Channels a & B.Caused by Voltage Spike.Setpoints Readjusted to Be Consistent W/Tech Specs (← links)
- 05000528/LER-1986-057, :on 861214,personnel Failed to Perform Fire Patrol on Schedule.Caused by Failure of Foreman to Assign Area to Fire Patrol.Personnel Received Disciplinary Action (← links)
- 05000528/LER-1988-018, :on 880729,NSSS ESF Actuation Sys Cabinet Potter & Brumfield Relay Failure Discovered.Caused by Inadequate Design by Cabinet Engineer.Relays Replaced & Design Changes Implemented (← links)
- 05000528/LER-1986-033, :on 860830,automatic Reactor Protection Sys Actuation Initiated Reactor Trip.Caused by Spurious Steam Generator Low Reactor Coolant Flow Trip on Channels a & B. Reactor Trip Function Setpoints Revised (← links)
- 05000528/LER-1986-036, :on 860527,reactor Trip Setpoints for Reactor Coolant Low Flow Trip Determined to Be Outside Tech Spec Limits.Caused by Vendor Supplying Incorrect Setpoints. Setpoints Reset (← links)
- 05000528/LER-1986-022, :on 860724,Train B Containment Purge Isolation Actuation Signal Initiated.Caused by Personnel Error.Shift Briefings on Overall Necessity for Strict Procedural Adherence Will Be Conducted (← links)
- 05000528/LER-1986-017, :on 860720,Train a Fuel Bldg Essential Ventilation Actuation Signal Occurred in Response to Signal from Radiation Monitor RU-31.Root Cause Undetermined.Problem Being Evaluated (← links)
- 05000528/LER-1986-032, :on 860515,while in Cold Shutdown,Inadvertent Actuation of Control Room Essential Filtration Actuation Sys Occurred.Caused by Procedural Deficiency.Procedure Revised (← links)
- 05000528/LER-1987-006, :on 870304,Limiting Condition for Operation 3.0.3 Entered Five Times Due to Inoperable Msivs.Caused by Fact That Sys Design Does Not Allow Tech Spec Action Statement to Be Met.Tech Spec Change Issued (← links)
- 05000528/LER-1986-046, :on 860625,conversion Constants Used in Software for Containment Radiation Monitor RU-1 Particulate Channels Found Incorrect.Caused by Use of Incorrect Flow Factor & Efficiency Constants (← links)
- 05000528/LER-1986-026, :on 860321,invalid Intercell Resistance Measurement Data Recorded During Preoperational Testing. Caused by Personnel Error.Personnel Counseled & 18-month Surveillance Test Completed (← links)
- 05000528/LER-1986-018, :on 860307,automatic Reactor Trip Occurred Due to Low Level Condition in Steam Generator 2.Caused by Anomaly in Speed Control Circuitry for Main Feedwater Pump A.Circuit Board Will Be Replaced (← links)
- 05000528/LER-1985-082, :on 850516,failure of Train a Emergency Diesel Generator to Load During Surveillance Testing Not Reported. Caused by Personnel Error.Personnel Responsible Will Be Briefed on Reporting Requirements (← links)
- 05000528/LER-1986-041, :on 860614 & 0531,channel Check on Radiation Monitor Missed.Radiation Protection Technicians Counseled on Verbatim Compliance W/Approved Procedures.Caution Also Added to Applicable Procedure (← links)
- 05000528/LER-1986-042, :on 860617,automatic Reactor Trip Generated Due to Low DNBR Trips.Caused by Inadequate Procedure.Procedure Rev Will Be Implemented to Correct Inadequacies (← links)
- 05000528/LER-1986-034, :on 860606 & 07,operator Recorded Safety Injection Tank Level,Which Was Below Acceptable Range,W/O Taking Appropriate Action.Caused by Personnel Error.Operator Counseled (← links)
- 05000528/LER-1986-012, :on 860306,discovered That 860304 Surveillance Test 41ST-1ZZ16 Performed Beyond Max Allowable Time for Three Consecutive Tests.Caused by Personnel Error.Dept Guideline Developed (← links)
- 05000528/LER-1986-038, :on 860603,technician Discovered Flow Rate Monitor & Sampler Flow Rate Measuring Device Daily Channel Checks Not Performed.Caused by Personnel Error.Radiation Protection Technicians Counseled Re Compliance (← links)
- 05000528/LER-1986-040, :on 860608,inadvertent Automatic Actuation of Balance of Plant/Esfas Occurred.Caused by Cognitive Personnel Error.Involved Personnel Counseled Re Verbatim Compliance (← links)
- 05000528/LER-1986-028, :on 860516,determined That Previous Testing Performed on Halon Portion of Fire Protection Sys Did Not Fulfill Tech Specs as Storage Tanks Could Not Be Calibr. Caused by Personnel Error.Fire Watch Posted (← links)
- 05000528/LER-1986-030, :on 860512,main Steam Isolation Signal (MSIS) Actuated After Steam Generator Filled to MSIS Setpoint During Surveillance.Caused by Personnel Error.Personnel Required to Read Experience Rept (← links)
- 05000528/LER-1986-029, :on 860422,surveillance Test of Pressurized Heater Capacity Incorrectly Performed Due to Procedural Deficiency.Caused by Personnel Error & Incorrect Calculation Method Specified in Procedures (← links)
- 05000528/LER-1985-046, :on 850930,continuous Fire Watch Mistakenly Discontinued for 18 Minutes While Main Steam Support Structure Fire Protection Sprinkler Sys Inoperable for Valve Repair.Cause Unknown (← links)
- 05000528/LER-1985-073, :on 850915,step Determining RCS (AB) Flowrate Signed Off as Not Applicable.Flowrate Determination Also Missed in Surveillances on 850606 & 0705.Flowrate Verified Satisfactory by Completion of 41ST-12218 (← links)
- 05000528/LER-1986-014-01, :on 860411,two Spurious Actuations of Fuel Bldg Essential Ventilation Sys Occurred.Caused by Dirty/Oxidized Relay Contacts in Feedwater Pump Circuit Breaker Control Circuit.Contacts Cleaned (← links)
- 05000528/LER-1986-027, :on 860406,plant Protection Sys Actuated & Main Steam Isolation Signal Received.Caused by Transient Induced by Signal Noise (Equipment Malfunction).Procedures Modified (← links)
- 05000528/LER-1986-014, :on 860411,two Actuations of Fuel Bldg Essential Ventilation Sys Occurred.Cause Undetermined.Low Range Monitor RU-145 Declared Inoperable.Action Statement & Sampling Requirements Initiated (← links)
- 05000528/LER-1986-051, :on 860930,determined That 50,000 Gallons of Effluent Chemical Waste Discharged to Evaporative Ponds W/O Sampling Since 860927.Caused by Cognitive Personnel Error. Procedure Revised Re Valve Identification (← links)
- 05000528/LER-1985-069, :on 850819,15 Steam Generator Blowdown Sys Snubbers Not Functionally Tested 12 Months Prior to Installation.Caused by Lack of Administrative Controls. Snubbers Replaced & Tested (← links)
- 05000528/LER-1986-013, :on 860221,spurious High Radiation Signal on Spent Fuel Pool Area Radiation Monitor RU-31 Occurred, Resulting in ESF Actuation.Caused by Electrical Noise in Grounding Sys.Design Change Implemented (← links)
- 05000528/LER-1985-056, :on 850802,containment Spray Sys Intentionally Isolated After Spurious Actuations.Caused by Corroded Contacts on Main Control Board Manual Initiation Switch. Switch Replaced (← links)
- 05000528/LER-1986-001-01, :on 860125,diesel Generator B Failed to Start During Manual Start Attempt.Caused by Failed Resistor in Electric Governor Circuitry.Failed Resistor & Amplifier Module Replaced & Diesel Tested Satisfactorily (← links)
- 05000528/LER-1986-010, :on 860120,results of Surveillance Test Procedure Exceeded Tech Spec Acceptance Criteria.Caused by Licensed Operator Error.Operator Counseled.Shift Supervisors Will Take More Responsibility (← links)
- 05000528/LER-1985-085, :on 850112,Train B Plant Vent Sys high-range Noble Gas Activity Monitor RU-144 Declared Inoperable. Caused by Inadequate Surveillance Procedure.Procedure Revised to Include Channel Check (← links)
- 05000528/LER-1986-002, :on 860106,third Quarter Strontium Air Filter Analysis Composite Samples Discovered in Warehouse Awaiting Shipment for Analysis.Caused by Incorrect Processing of Purchase Order (← links)
- 05000528/LER-1985-091, :on 851122,outstanding Valve Retest Discovered on Shutdown Cooling Isolation Valve.Caused by Misinterpretation of Retest Requirements.Surveillance Test Procedure Performed & Valve Declared Operable (← links)
- 05000528/LER-1985-077, :on 851121,balance-of-plant ESFAS (BOP-ESFAS) Train a Containment Purge Isolation Actuation Signal Initiated.Caused by Improper Reset by Control Room Operator Trainee (← links)
- 05000528/LER-1986-024, :on 860207,reactor Trip Occurred Due to Low Level Condition in Steam Generator 1.Caused by Operator Error During Transition from Downcomer to Economizer Feed Paths.Event Reviewed by All Licensed Operators (← links)
- 05000528/LER-1986-015, :on 860126,after Planned Trip for Load Rejection Test,Required Dose Equivalent Iodine Sample Not Performed.Caused by Technician Failing to Prioritize I-131 Sampling.Required Tech Spec Reading Updated (← links)
- 05000528/LER-1985-088, :on 851204,while Controlling Axial Shape Index w/part-length Control Element Assembly,Reactor Trip Occurred.Caused by Defective Phase Synchronizing Card.Card Replaced & Calibr.Assembly Replaced (← links)
- 05000528/LER-1986-016, :on 860127,operator Failed to Perform High Containment Pressure Surveillance Test within Required Time. Caused by Operator Error.Surveillance Performed.Operator Counseled.Supervisors Reviewed Procedures (← links)
- 05000528/LER-1985-066, :on 851012,100-ft Level Emergency Containment Airlock Inner Door Failed Seal Test.Caused by Personnel Error.Procedure Revised to Specify Correct Actions If Inner Door Fails & Requires Repair (← links)
- 05000528/LER-1986-012-01, :on 860321,intercell Resistance Measurement Data Exceeded Tech Specs & Data Misinterpreted as Acceptable.Caused by Personnel Error.Personnel Counseled. Other Surveillance Test Credit Taken Reviewed (← links)
- 05000528/LER-1986-007, :on 860226,particulate Air Filter from Plant Vent Radiation Monitoring Unit RU-143 Inadvertently Discarded.Caused by Chemistry Technician Error.Applicable Procedure Revised to Include Caution Statement (← links)
- 05000528/LER-1985-093, :on 851218,improper Valve Lineup on Radiation Monitor RU-141 Discovered.Caused by Radiation Protection Technician Error & Missing O-ring from Sample Holder Which Prevented Low Flow Alarm.Procedures Revised (← links)
- 05000528/LER-1985-080, :on 851220,reactor Tripped on High Pressurizer Pressure.Caused by out-of-tolerance Setpoint in Turbine Demand Runback Module.Module Setpoint Reset & Procedures Changed Re Observing Proper Caution (← links)
- 05000528/LER-1985-047, :on 850702,fire Watch Performed Late on Main Steam Support Structure.Caused by Personnel Not Gaining Timely Access to Area.Priority Given to Fire Watch Access.W/ (← links)
- 05000528/LER-1985-019, :on 850614,low Suction Trip of Main Feedwater Pumps B & a Occurred.Caused by Inability of Main Feedwater Pump a to Overcome Suction Pressure Loss Due to Windmilling Pump.Feedwater Control Sys Adjusted (← links)
- 05000528/LER-1985-049, :on 850717,automatic Reactor Trip Occurred Due to Communication Problem in Control Element Assembly Calculator/Core Protection Calculator Data Link.Hardware Mod Completed on 851212 (← links)
- 05000528/LER-1985-076, :on 851007,reactor Trip Resulting from Loss of Offsite Power Occurred.Caused While Troubleshooting Plant Multiplexor (Pmux).Switchyard Breakers Hardwired to Bypass Pmux Breaker Control (← links)
- 05000528/LER-1985-058, :on 851003,reactor Trip Occurred Due to Low DNBR on Core Protection Calculators.Caused by Switchyard Breakers Opening Due to Malfunction in Multiplexer.Breakers Hardwired.Coolant Pump Procedures Revised (← links)
- 05000528/LER-1985-067, :on 850916,radiation Protection Group Not Notified of Low Flow Alarm for Plant Vent Sys Low Range Radiation Monitor Ru-143 & Required Samples Not Collected. Caused by Personnel Error (← links)
- 05000528/LER-1985-086, :on 851112,main Steam Isolation Signal Generated by Low Steam Generator Pressure Signals.Caused by High Tolerance Band of Variable Low Steam Generator Pressure Setpoint.Mod to Sys Being Investigated (← links)
- 05000528/LER-1985-084, :on 851110,inadvertent ESF Initiation of Control Room Essential Filtration Sys Occurred.Caused by Personnel Error.Recovery from Event Initiated & Sys Restored to Operable Status (← links)
- 05000528/LER-1985-072, :on 850913,automatic Sampling of Gaseous Radwaste Sys Not Available & Manual Sampling Not Accomplished.Caused by Inadequate Assurance of Gas Stripper Prior to Operation.Procedures Revised (← links)
- 05000528/LER-1985-081, :on 851029,leaking Pump Seals & Pressure Transducer in post-accident Sampling Sys Inoperable for More than 7 Days.Pump Leaks Repaired & Transducer Replaced (← links)
- 05000528/LER-1986-006, :on 860109,turbine Trip Initiated by Manual Actuation of Differential Generator Protection Relay, Resulting in Loss of Power to Reactor Coolant Pumps.Power Restored.Study Underway (← links)
- 05000528/LER-1985-071, :on 851024,reactor Tripped Following Manual Turbine Trip Due to Low Steam Generator Level.Caused by High Pressure Pulse Due to Rapid Closure of Throttle Valves.Time Delay Increased for Low Level Trip Bistable (← links)
- 05000528/LER-1985-051, :on 851023,charging to RCS Lost.Caused by Maint Personnel Inadvertently Opening Unisolated Reactor Coolant Pump Injection Filter.Flow Reestablished Per Tech Spec 3.0.3.Personnel Involved Counseled (← links)
- 05000528/LER-1985-097, :on 851229,spurious Initiation of Automatic ESF Actuations Occurred.Caused by Component Failure on Computer Card Installed in Radiation Monitor.Defective Computer Card Replaced (← links)
- 05000528/LER-1985-096, :on 851227,determined Seismic Gap Area Between Diesel Generator & Control Bldgs Not Identified & Analyzed During Fire Hazard Analysis.Caused by Engineer Oversight. Fire-rated Door Seals to Be Installed (← links)
- 05000528/LER-1985-090, :on 851216,automatic Actuation of Plant Protection Sys Resulted in Reactor Trip Due to Low Level in Steam Generator 1.Caused by Operator Error.Operating Procedures Revised (← links)
- 05000528/LER-1985-061, :on 850803,improper Valve Lineup on Radiation Monitor in Fuel Bldg Ventilation Sys Discovered.Caused by Failure of Low Flow Alarm When Valves Placed in Incorrect Configuration.Technicians Counseled (← links)
- 05000528/LER-1985-075, :on 851213,during Monthly Protection Sys Functional Test Surveillance Procedure,Inadvertent Actuation of Trains a & B Safety Injection & Containment Isolation Occurred.Caused by Personnel Error (← links)
- 05000528/LER-1985-087, :on 851209,discovered That Response Time for Loss of Power Relays Did Not Meet Acceptance Criteria.Unit Entered Mode 3 on 851128 W/O Meeting Action Statement (← links)
- 05000528/LER-1985-054, :on 850618,seal Leak Test Not Performed within 72 H Following Operation of Emergency Airlock on 100 Ft Level of Containment Bldg.Security Sys Test Procedure 20SP-02209 Will Be Modified to Notify of Test (← links)
- 05000528/LER-1985-059, :on 850811,12,24,29 & 0904,unlocked Fire Doors Discovered.Caused by Failure to Implement Surveillance Procedures.Locked & Unlocked Fire Doors Included in Surveillance (← links)
- 05000528/LER-1985-052, :on 850808,post-accident Sampling Sys Matl Deficiencies Identified,Resulting in Plant Potentially Being Outside NUREG-0737 Design Conditions.Caused by Inadequate Design by Original Vendor (← links)
- 05000528/LER-1985-060, :on 850809,discovered That Chemical & Vol Control Sys Letdown Snubbers Not Functionally Tested within 12 Months Prior to Installation,Per Tech Spec 4.7.9(h). Caused by Inadequate Administrative Controls (← links)
- 05000528/LER-1985-057, :on 850803,RCS Pressurized to Greater than 1,837 Psia W/Only Three Safety Injection Tanks Pressurized to Greater than 600 Psig.Caused by Misinterpretation of Tech Spec 3.5.1.RCS Pressure Lowered (← links)
- 05000528/LER-1985-055, :on 850803,discovered That Condenser Air Removal & Fuel Bldg Exhaust Effluent Monitors Inoperable Due to Surveillance Requirements Not Being Performed.Radiation Protection Placed on Checklist 410P-1ZZ11 (← links)
- 05000528/LER-1985-041, :on 850705,essential Air Filtration Units for Control Room & ESF Pump Rooms Declared Inoperable Due to Improper Sampling Procedures.Caused by Tech Spec Requirements Not Being Met (← links)
- 05000528/LER-1985-053, :on 850723,during Mode 2,containment Purge Train a Radiation Monitor Failed,Resulting in Actuation of Containment Purge Isolation & Control Room Filtration Sys. Cause Unidentified.Failure Has Not Recurred (← links)
- 05000528/LER-1985-050, :on 850717,containment Pressure Transmitter Isolation Valve Found Closed.Cause Undetermined.Calibr Procedure Revised (← links)
- 05000528/LER-1985-031, :on 850417,control Room Essential Filtration Actuation Signal Occurred.Caused by Spurious High Radiation Alarm.High Radiation Trip Setpoint Raised to New Tech Spec Limit (← links)
- 05000528/LER-1985-042, :on 850711,identified RCS Leak Rate of 1.28 Gpm,Exceeding 1.0 Gpm Limit.Plant Shut Down Per Tech Spec 3.4.5.2.b.Caused by Miscalculation of Leak Rate Due to Procedural Deficiency.Procedure Improved (← links)
- 05000528/LER-1985-045, :on 850703,insp & Tests of ASME Code Class Component Not Reviewed within 96 H.Caused by Failure to Keep Engineers Appraised of Testing.Engineers Now Placed on Distribution List for Test Schedules (← links)
- 05000528/LER-1985-070, :on 850924,loss of Reactor Core Distribution Monitoring Went Undetected for 8 H.Caused by Hardware Failure in Computer Sys.Hardware Problem Corrected & Software Modified to Make Loss Recognizable (← links)
- 05000528/LER-1985-044, :on 850613 & 20,while Radiation Monitor RU-143 Inoperable,Limiting Condition for Operation for Sample Analysis of Plant Vent Monitor Exceeded.Briefing Session Held (← links)
- 05000528/LER-1985-063, :on 850912,when Main Generator Breaker Opened, Reactor Tripped Due to Core Protection Calculators Sensing Loss of Forced Coolant Circulation.Reactor Trip Caused Turbine Trip.Cause Not Stated (← links)
- 05000528/LER-1985-043, :on 850701,reactor Tripped Automatically on High Pressurizer Pressure.Caused by Loss of Feedwater Pump a Due to Low Suction Pressure.Strainers Replaced & Differential Pressure Restored to Normal (← links)
- 05000528/LER-1985-065, :on 850829,moisture Buildup in Sample Line from Gaseous Radwaste Surge Tank to Associated Sample Point Prevented Sampling of Tank.Caused by Design Problem.Design Mod Will Be Installed (← links)
- 05000528/LER-1985-008, :on 850204,max Flow Delivery to Steam Generator Following Automatic Actuation Unclear.Results of Analysis Confirm as-built Plant Performance Demonstrated to Produce Results Conservative W/Current FSAR Analysis (← links)
- 05000528/LER-1985-064, :on 850826,actuation of Control Room Essential Filtration Actuation Signal Occurred.Caused by High Radiation Alarm Set Off by Ground Design Mod of Radiation Monitoring Sys.Esf Maint Procedures Revised (← links)
- 05000528/LER-1985-039, :on 850622,Procedure 41ST-1ZZ23 Performed at 12 H Intervals Rather than 4 H Intervals as Required for Inoperable Power Dependent Insertion Limit Alarm Circuit. Caused by Personnel Error (← links)
- 05000528/LER-1985-048-01, :on 850819,both Emergency Core Cooling Sys (Bq,Bp) Subsystems Declared Inoperable.Caused by Personnel Failure to Verify Throttle Valve Positions.Positions Verified & Procedures Modified (← links)
- 05000528/LER-1985-029, :on 850526,surveillance Procedure for Insp of Fire Door Performed 30 H & 22 Minutes After Previous Insp Rather than at Required 24 H Interval.Caused by Inability of Fire Watch to Gain Access to Doors (← links)
- 05000528/LER-1985-021, :on 850425,maint Performed in Containment While Fire Protection Header Isolated.Caused by Personnel Error. Tech Spec Rev Being Prepared to Clarify Requirements of Tech Spec 3.7.11.4 (← links)
- 05000528/LER-1985-030, :on 850425,both ECCS Trains Declared Inoperable Due to Indeterminate Operability of Containment Recirculation Sump Isolation Check Valves.Caused by Failure to Retest Valves Following Disassembly (← links)
- 05000528/LER-1985-025, :on 850314,Train a HPSI Sys Used to Provide Required Boron Injection Flowpath W/Asme Section XI Surveillance Test Not Current on Train a Pump.Caused by Personnel Error.Mgt Directive Issued (← links)
- 05000528/LER-1985-037, :on 850429,particulate Filter Destroyed & Iodine Charcoal Filter Cartridge Saturated W/Water, Invalidating Grab Sampling Data.Caused by Excess Moisture from Condensation in Sample Lines (← links)
- 05000528/LER-1985-034, :on 850521,five Readings of Pressurizer Temp Not Recorded During Sys Cooldown.Caused by Operator Error. Operators Counseled on Surveillance Requirements & Reminded to Record Data Readings on Time (← links)
- 05000528/LER-1985-028, :on 850417,ESFAS 2 Out of 4 Coincidence Logic Actuated During Surveillance Test of Local Operability of Train B Class Electrical Sys.Caused by Battery Chargers B & D Not Properly Verified as Returned to Svc (← links)
- 05000528/LER-1985-022-01, :on 850413,automatic Actuation of Fuel Bldg Essential Ventilation Sys Occurred.Caused by Spurious High Radiation Alarm on Fuel Pool Area Radiation Monitoring Unit. Design of Grounding Being Evaluated (← links)
- 05000528/LER-1985-024, :on 850412,during Performance of Surveillance Procedure for Locked Fire Doors,Fire Doors on List Discovered Unlocked.Caused by Procedural Error.Procedure Revised to Include Correct Doors (← links)
- 05000528/LER-1985-035, :on 850525 & 0604,pump Performance Test Results Not Reviewed within 96 H as Required by ASME Boiler & Pressure Vessel Code,Section Xi.Caused by Procedural Errors in Test Data Routing.Routing Methods Revised (← links)
- 05000528/LER-1985-036, :on 850520,improper Sample Lineup for Sample Cart Occurred After Noble Gas Grab Sample Taken by Contractor Technician.Correct Sample Lineup Reestablished. Contractor Technician Retrained (← links)
- 05000528/LER-1985-032, :on 850423,discovered Particulate & Charcoal Sampling Media in Fuel Bldg Ventilation Monitor W/Sample Flow Routed Through Alternate Collection Chamber.Caused by Personnel Error.Technician Counseled (← links)
- 05000528/LER-1985-033, :on 850508,inadvertent Actuation of Control Room Essential Filtration & Containment Purge Isolation Occurred.Caused by Reenergizing Remote Indication & Control Unit for RU-38.Personnel Counseled (← links)
- 05000528/LER-1985-026, :on 850329,diesel Generator B Failed to Attain Required Frequency.Start Failure Third in Five Valid Tests. Caused by Test Performance Error & Not Actual Diesel Generator Failure (← links)
- 05000528/LER-1985-016, :from 850323-0415,hourly Fire Patrols Not Conducted Per Tech Spec 3.7.12.Caused by Personnel Disregard for Responsibilities.Personnel Fired &/Or Replaced W/Station Staff & Logs & Monitoring Improved (← links)
- 05000528/LER-1985-002, :on 850113,loss of Open Indication & Closing Circuit Power Occurred on Spray Pump Pond Train A.Caused by Metal Washer Left from Const Phase Shorting Out Type 752A Relay.Problem Corrected (← links)
- 05000528/LER-1985-017, :on 850405,Trains a & B of balance-of-plant ESFAS Automatically Tripped.Caused by Inadvertent High Output When Radiation Monitor Reenergized.Sys Module Will Be Put in Bypass (← links)
- 05000528/LER-1985-023, :on 850406,inadvertent Actuation of ESF Sys Occurred During Electrical Surveillance Test.Caused by Technician Mistakenly Opening Breaker Not Specified in Procedure.Personnel Reinstructed (← links)
- 05000528/LER-1985-022, :on 850402,during Performance of Retesting Per Contractor Work Order (Cwo) 81614,inadvertent Start of Diesel Generator B Occurred.Caused by Energizing of 4EX1 Relay Due to Sneak Circuit.Cwo Amended (← links)
- 05000528/LER-1985-009, :on 850321,inadvertent Reactor Trip Occurred. Caused by Personnel Error Associated W/Procedural Deficiency.Procedure Change Notice Written (← links)
- 05000528/LER-1985-018, :on 850305,diesel Generator a Failed to Attain Required Voltage Frequency & Determined Inoperable.On 850308,diesel Generator B Declared Inoperable.Caused by Invalid Surveillance Test.Test Modified (← links)
- 05000528/LER-1985-015, :on 850312,Tech Spec Surveillance Requirement Not Completed within Required Interval.Caused by Personnel Error Involving Scheduling of Surveillance Test Procedure. Effective Scheduling Coordination Implemented (← links)
- 05000528/LER-1985-012, :on 850312,two Channels of Low Steam Generator Pressure Signals Spuriously Actuated,Resulting in All Four Breakers to Reactor Trip Switchgear Opening.Cause Unknown (← links)
- 05000528/LER-1985-010-01, :on 850225,balance-of-plant ESF Sys Actuated. Caused by Transfer of Train a Sequencer from Auto to Manual Mode,Causing cross-trip to Train B.Train a & B Cabinets Reset & Sys Returned to Normal (← links)
- 05000528/LER-1985-014, :on 850302,cross Trips of Train B balance-of-plant ESF Actuation Sys Occurred.Caused by Dc Backup Power Supply in Train a Being Out of Svc.Procedure Change Notice Developed (← links)
- 05000528/LER-1985-005, :on 850122,containment Purge Isolation & Fuel Bldg Essential Filtration Actuation Signals Actuated Simultaneously.Caused by Spurious Equipment Failure Alarm on Associated Radiation Monitoring Units (← links)
- 05000528/LER-1985-004, :on 850120,containment Purge Isolation & Control Room Essential Filtration Actuation Signals Automatically Actuated.Caused by Spurious Auxiliary Equipment Failure Alarm (← links)
- 05000528/LER-1985-010, :on 850222,automatic Actuation of balance-of- Plant ESF Actuation Sys Occurred When Placing Train a Sequencer in Manual from Automatic Mode.Caused by Unique Circumstances Involving flip-flop U-14 (← links)
- 05000528/LER-1985-013, :on 850223,Train B Diesel Generator Started Inadvertently During Routine Surveillance Testing.Caused by Error in Surveillance Procedure for Testing Certain Subgroup Relay Contacts.Change Notice Issued (← links)
- 05000528/LER-1985-007, :on 850210,automatic Activation of NSSS ESF Actuation Sys Auxiliary Relay Cabinet Occurred Due to Train a Power Supply Failure.Caused by Faulty Transformer. Power Supply Replaced (← links)
- 05000528/LER-1985-006, :on 850131,bus Feeder Breaker S05 from Startup Transformer X03,1E-NAN-S05B,tripped While Tagging Out Control Circuit Fuses in Breaker Cubicle.Caused by Operator Accidently Hitting Breaker Control Switch (← links)
- 05000528/LER-1995-001, :on 950215,plant Switchyard Voltage Dropped Below Administratively Imposed Limit of 525 Kv for Approx 2.5 Minutes & Caused TS LCO 3.0.3 to Exist.Prepared Personnel for Potential Voltage Drops (← links)
- 05000528/LER-1989-025, :on 891103,discovered That Radiant Energy Fire Barrier Missing from One of Two Pressurizer Auxiliary Spray Valves in Pressurizer Room.Caused by Incomplete Drawings.Engineering Evaluation Underway (← links)
- 05000528/LER-1993-007-02, Corrected Ltr Forwarding LER 93-007-02,changing Corrective Action Due Date to Coincide W/Reply to Notice of Violation 50-528/93-12-04.W/o Encl (← links)
- 05000528/LER-2017-002, Emergency Diesel Generator Inoperable Due to Fuel Oil Transfer Pump Testing (← links)
- 05000528/LER-2019-001, Emergency Core Cooling System Valve Leakage Resulting in an Unanalyzed Condition (← links)
- 05000528/LER-2018-004-01, Engineered Safety Feature Pump Room Exhaust Air Cleanup System Failure Resulting in a Condition Prohibited by Technical Specifications (← links)
- 05000528/LER-2018-002, Title Condition Prohibited by Technical Specification for Inoperable Excore Instrument Channel (← links)
- 05000528/LER-2018-003, Condition Prohibited by Technical Specification 3.7.4 Due to Inoperable Atmospheric Dump Valve (← links)
- 05000528/LER-2018-001, Unit, Automatic Actuation of the Reactor Protection System Resulting from a Loss of Reactor Coolant Pumps (← links)
- 05000528/LER-1999-005, Forwards LER 99-005-00 Reporting Findings & Corrective Actions Taken as Result of Out of Tolerance MSSV Condition in Unit 1 Which Was Discovered During pre-outage Testing (← links)
- 05000528/LER-1999-002-01, :on 990730,test Mode Trip Bypass for EDG Output Breakers Not Surveilled.Cause Under Investigation.Operations Personnel Conservatively Invoked SR 3.0.3 for SR 3.8.1.13. with (← links)
- 05000528/LER-1999-003, :on 990317,required Surveillance Requirement Not Completed Due to Deficient Procedure,Was Determined. Caused by Cognitive Personnel Error.St Procedures Revised to Require Chiller to Be Operating & Oil Temperature Checked (← links)
- 05000528/LER-1999-001-02, :on 990310,RT on High Pressurizer Pressure Was Noted.Caused by Loss of Heat Removal.Cr Supervisor Was Removed from Shift Duties for Diagnostics Skills Training. with (← links)
- 05000528/LER-1996-008, :on 960507,inadequate Procedure Results in Nuclear Power Channels Not Calibrated During Power Ascension Tests Occurred.Caused by Deficient Procedure.Procedure Revised (← links)
- 05000528/LER-1996-003, Forwards LER 96-003-00 Prepared & Submitted Pursuant to 10CFR50.73.LER Reports TS Violation Involving Nuclear Power Channel Calibrations,Due to Precedural Deficiency (← links)
- 05000528/LER-1998-003-01, Forwards LER 98-003-01,IAW 10CFR50.73.Interim Corrective Actions Which Were Implemented to Control Fbt Blocking, Have Subsquently Been Discontinued Based Upon More Recent Analysis (← links)
- 05000528/LER-1998-008, :on 980729,EQ of Electrical Connectors Were Not Adequately Demonstrated.Caused Because Test Was Conducted with Only Single Lv Connector & Without Fully Ranged Inputs. Revised EQ Requirements (← links)
- 05000528/LER-1998-007-01, Forwards LER 98-007-01 Re Letdown Leak That Required Entry Into TS LCO 3.0.3.LER Contains Specific Commitments for Correcting Condition (← links)
- 05000528/LER-1998-006-01, Forwards LER 98-006-01 Re Hpsip Discharge Check Valves Being Misaligned.Ler Contains Commitments for Correcting Condition (← links)
- 05000528/LER-1998-007, :on 980520,CR Personnel Observed Flow & Pressure Perturbations on Chemical & Vol Control Sys Letdown Sys.Caused by Cyclic Fatigue Due to Dynamic Pressure Transients.Unit Letdown Piping Replaced (← links)
- 05000528/LER-1998-006, :on 980507,determined That Plant Was Outside Design Basis Due to SI Discharge Check Valve Reverse Flow. Check Valve Was Disassembled,Examined & Reassembled, Whereupon Valve Met Acceptance Criteria (← links)
- 05000528/LER-1998-005, :on 980428,noted That Required Response Time Testing Had Not Been Performed.Caused by Personnel Error. Coached I&C Personnel Responsible for Reviewing Work Authorization Documentation (← links)
- 05000528/LER-1998-004, :on 980304,safety Valves as-found Pressures Out of Tolerance.Cause of Event Is Under Investigation.Three MSSVs & Psv Will Be Replaced W/Refurbished & Recertified Valves During Refueling Outage U1R7 (← links)
- 05000528/LER-1998-003, Forwards LER 98-003-00 Reporting Unanalyzed Condition Which Exists When Automatic Fast Bus Transfer Capability Is Blocked to Prevent Transfer of non-class Plant Equipment from Unit Auxiliary to Startup Transformer (← links)
- 05000528/LER-1998-002, Forwards LER 98-002-00,which Repts Automatic Reactor Trip on Low SG Level Due to Insufficient Main Feedwater Flow.Ler Does Not Contain Commitments (← links)
- 05000528/LER-1998-001, :on 980130,reactor Protection & ESFAS Instrumentation Not Bypassed within one-hour Allowed by TS Occurred.Caused by Inadequate Procedures.Expectation to Detect Alarm Conditions Was Emphasized to CR Personnel (← links)
- 05000528/LER-1997-006-01, :on 971028,missed TS 4.0.5 SR Was Noted.Caused by Personnel Error.Independent Investigation of Event Is Being Conducted IAW W/Aps Corrective Action Program (← links)
- 05000528/LER-1997-006, Forwards LER 97-006-00,which Reports Violation of TS Due to Missing Performance of SR for ASME Section XI ISI Pressure Test (← links)
- 05000528/LER-1997-005, Forwards LER 97-005-00,re Violation of TS SR 4.5.2.c.2 Resulting from Inadequate Procedural Impact Review of TS Amend (← links)
- 05000528/LER-1997-004, Forwards LER 97-004-00 Re Inverters for Class 1E 120 Vac Vital Instrument Distribution Buses & Inverters for Class 1E 125 Vdc Buses Which Were Not in Compliance W/Seismic Design Requirements (← links)
- 05000528/LER-1997-003, Forwards LER 97-003-00 Re Inadequate Protection Against Floodwater Migration Due to Construction Design Deficiency. Commitments Made by Util,Encl (← links)
- 05000528/LER-1997-002-02, :on 970528,SR for Core Protection Was Not Performed Due to Inadequate Procedures.Revised Procedures (← links)
- 05000528/LER-1997-002, Forwards LER 97-002-00,reporting Violation of TS Due to Missing Performance of SR for Core Protection Calculators (← links)
- 05000528/LER-1996-003-01, Forwards LER 96-003-01 Per 10CFR50.73.Commitments Made in Crdr 160156 Included (← links)
- 05000528/LER-1995-007-02, Forwards LER 95-007-02 Re Adverse Affect of Low Bench Set on Fisher Air Operated Letdown/Containment Isolation Valves (← links)
- 05000528/LER-1996-007, :on 961119,surveillance Test Deficiencies Were Found During GL 96-01 Review Leading to TS 3.0.3 Entries. Caused by Increase in Scope of Required Testing.Supplement Will Be Submitted (← links)
- 05000528/LER-1996-001-01, Documents Conversation Between Util & D Kirsch on 960726 Re Commitment Update for LER 96-001-01 (← links)
- 05000528/LER-1996-002-02, :on 960514,Tech Spec Violation Occurred Due to Erroneous Surveillance Requirement.Caused by Incorporation of C-E Generic Ts.Investigation Being Conducted (← links)
- 05000528/LER-1996-001, Forwards LER 96-001-00 Re Identification of Condition Resulting in Being Outside Design Basis of Plant,Could Have Adversely Affected Ability to Achieve & Maintain Safe Shutdown Conditions,Per PVNGS Fire Protection Program (← links)
- 05000528/LER-1995-007, :on 950512,determined That Bench Settings of air-operated Letdown & Containment Isolation Valves Adversely Affected Ability of Valves to Perform 10CFR50 App R Safety Function.Affected Valves Modified (← links)
- 05000528/LER-1995-016, :on 951212,containment Spray TS Violation Occurred Due to Unrecognized Valve Failure.Shim/Band Was Placed Around Stator of 1JSIBUV665 Motor Operator to Maintain Stator in Correct Position (← links)
- 05000528/LER-1995-014, :on 951209,reactor Tripped Following Degradation of Main FW Flow.Caused by Malfunction of FWCS Power supply,NNN-D11,transfer switch.NNN-D11 Aligned to Normal Power Supply (← links)
- 05000528/LER-1995-013, :on 951201,AFW Sys Was Outside Design Basis of Plant.Caused by Design Error.Performed Assessment to Demonstrate That Existing Condition Does Not Pose Addl Safety Concerns (← links)
- 05000528/LER-1995-011, :on 951018,identified Procedural Deficiency W/Msiv & FWIV ISTs Due to Personnel Error.Verified Operability of MSIVs & FWIVs (← links)
- 05000528/LER-1995-010, :on 950727,equipment Qualification of Air Handling Unit Caused Essential Cw Pump to Be Inoperable. Used Work Orders to Drill Weep Holes in Motor Lead Connection Boxes (← links)
- 05000528/LER-1995-004, :on 950329,containment Electrical Penetration Overcurrent Protective Devices Found Outside Design Basis. Caused by Error on Part of Original Architect Engineer. Modified Affected Circuits Critical to Normal Operational (← links)
- 05000528/LER-1995-005, Forwards Suppl LER 95-005 Reporting Six Electrical Penetration Circuits (← links)
- 05000528/LER-1995-003-01, :on 950729,switchyard Voltage Dropped Below Administratively Imposed Limit of 524 Kv for Approx 10 Seconds Due to Transient Grid Voltage.No C/A Taken Since Transmission Sys Transient Short Duration (← links)
- 05000528/LER-1995-002, :on 950303,identified That Slb Analyses Failed to Consider as Initial Condition One Percent SDM for All Rods in (ARI) Due to Lack of Coordination & Unclear Div of Responsibilities.Ari Core Data Book SDM Curves Modified (← links)
- 05000528/LER-1995-002-01, Forwards LER 95-002-01,providing Addl Info on Cause, Corrective Actions & Safety Significance of Temp Dependent Shutdown Margin Used in Mode 3 Steam Line Break Analysis Reported in Original Submittal (← links)
- 05000528/LER-1994-008, :on 940929,identified That Preventive Maintenance Task for Calibrating Boronometer Overdue.Caused by Personnel Error.Procedure Revised to Address Condition (← links)
- 05000528/LER-1994-004, :on 941006,Train a Declared Inoperable Due to Projection of Test Results Indicated Battery Banks Did Not Meet 90% Criteria of TS SR 4.8.2.1.e.Caused by Loss of Positive Active Matl.Proposed TS Amend Submitted (← links)
- 05000528/LER-1994-009, :on 941118,determined That Letdown Isolation Valve Could Not Satisfy 10CFR50,App R Related Requirement. Caused by Personnel Error.Procedure Changes Implemented Which Eliminate Reliance on Isolation Valve During Shutdown (← links)
- 05000528/LER-1994-006, :on 941021,identified That Actual Flow Rate on Spray Pond Pumps May Be Exceeding Design Flow Rates.Caused by Oversized Orifices in Spray Pond Return Lines. Administrative Controls Established to Counter Condition (← links)
- 05000528/LER-1994-005, :on 940619,determined That CPC Channel D,Delta- T Power Signal Could No Longer Be Adjusted Per TS Requirements.Caused by Loop 2 Hot Leg Temp RTD Fluctuations. Channel Calibrated & Declared Operable (← links)
- 05000528/LER-1995-006, :on 930418,identified That Motor Pinion Key for Containment Spray Header Isolation Valve Occurred.Caused by Improper Key Matl.All Identified Valves Had Motor Pinion Keys Replaced (← links)
- 05000528/LER-1994-008-02, :on 941126,controlled Reactor Shutdown Commenced to Isolate & Repair Leaking Pressurizer Vent Valves,Per TS Limiting Condition for Operation 3.4.10,action (A).Valves Reworked (← links)
- 05000528/LER-1993-011, Forwards Suppl 1 to LER 93-011 Per 10CFR50.73,reporting That Addl Undervoltage Scenario Has Been Identified That Could Result in Possible Double Sequencing of SR Equipment (← links)
- 05000528/LER-1994-010, :on 930409,misalignment of Limitorque Torque Switch Contact Bar Prevented Remote Operation of Movs. Evaluation of All Flex Wedge Gate Valves & SB Type MOVs Was Performed (← links)
- 05000528/LER-1994-006-01, On 941021,identified Actual Flow Rates on Unit 1 Spray Pond Pumps May Be Exceeding Design Flow Rates. Caused by Oversized Orifices in Unit 1 Spray Pump Return Lines.Established Administrative Controls (← links)
- 05000528/LER-1994-002-02, Forwards LER 94-002-02:on 940422,condition That Resulted in Plant Being in Condition Not Covered by Plant Operating Procedures (← links)
- 05000528/LER-1994-005-01, :on 940619,RTD Creating Delta-T Power Fluctuations Was Electronically Switched w/T-h RTD Used in Core Operating Limits Supervisory Sys.Caused by Condition of Fluctuating T-h RTD Signals (← links)
- 05000528/LER-1994-001, :on 940407,determined That SR 4.8.4.1 Not Fully Met Due to Personnel Error.Pm Task Specifying Sample Sizes of Molded Case Circuit Breakers Will Be Updated & Applicable Breakers Will Be Tested by 941014 (← links)
- 05000528/LER-1994-002, :on 940422,determined That TS 3.1.1.1,3.3.1 & 3.9.1 LCO May Not Ensure That Plant Operation Is Maintained within Safety Analysis.Caused by Groundrules Adjunct to Ts. TS Change Request Is Being Prepared (← links)
- 05000528/LER-1993-010, :on 931105,determined That,In Past,Capability of Number of MOVs to Perform Intended Safety Function,Under Design Basis Condition Questionable.Planned Testing of MOVs to Meet GL 89-10 Performance Criteria Expected to Continue (← links)
- 05000528/LER-1993-009, :on 931022,determined That 18 of 20 MSSVs & 4 of 4 Pressurizer Safety Valves Setpoints (Psv) Out of Tolerence Due to Setpoint Drift.Mssvs & Psvs Lift Setpoints Adjusted within TS Limits (← links)
- 05000528/LER-1993-008, :on 930224,gaseous Radwaste Sys Oxygen Monitor Out of Svc for 18 Days Due to Random Component Failure. Updated Grs Explosive Gas Monitoring Sys (← links)
- 05000528/LER-1993-007, :on 930512,concluded That TS SR 4.7.9.e Incorrectly Interpreted.Pvngs Snubber Testing Program Will Be Revised to Correctly Implement TS Requirements Prior to Commencing Next Testing Cycle (← links)
- 05000528/LER-1987-020, :on 870416,inadvertent ESF Actuation Occurred. Caused by Parity Error on Byte of Data Between Microprocessor & Remote Indication Controller.Mod to Install Time Delay Relays Developed (← links)
- 05000528/LER-1993-005, :on 920728,identified That Redundant Trains of Safe Shutdown Equipment Could Be Rendered Inoperable by Single Fire.Fire Watches Manned in Any Area Not Already Under Conpensatory Fire Watch (← links)
- 05000528/LER-1993-006, :on 930505,determined That Original Design of Shutdown Suction Isolation Valve Motor Control Circuits May Not Meet Requirements for Overload Protection Bypass.Cause Under Investigation.Lco 3.8.4.2 Entered & Mods Completed (← links)
- 05000528/LER-1993-006-01, Forwards LER 93-006-01,providing Addl Info on Status of Unit 2 During Event (← links)
- 05000528/LER-1993-004, :on 930520,ASME Section XI Testing of Charging Pumps Not in Compliance W/Code Requirements Due to Personnel Error.C/As:Testing in Accordance W/Asme Section XI Code Requirements (← links)
- 05000528/LER-1993-003, :on 930213,normal Supply Breaker to non-Class 1E 13.8 Kv Intermediate Bus Opened on Overcurrent,Resulting in Loss of Power to Train A.Caused by Insulation Breakdown on Breaker Bushing.Damaged Breaker Removed (← links)
- 05000528/LER-1993-003-01, Forwards LER 93-003-01,providing Addl Info on Root Cause of Failure & Component Failure Data (← links)
- 05000528/LER-1993-002, Forwards LER 93-002-00 Re Discovery That Design Basis Fire in Control Room,Concurrent W/Loss of Offsite Power Could Result in Loss of Control Room Power to Train B DG Output Breaker & Essential Exhaust Fan Breaker (← links)
- 05000528/LER-1993-001, Corrected Ltr Forwarding LER 93-001-00,containing Rept Date & Correct Page Numbers.Ler Discusses Manual Reactor Trip as Result of Automatic Main Turbine Trip (← links)
- 05000528/LER-1993-001-01, :on 930130,main Turbine Trip Occurred Which Initiated Manual Reactor Trip After Receiving High Pressurizer Pressure Pretrip Alarm.Caused by Failure of High Tank Level Controller.Failed Controller Replaced (← links)
- 05000528/LER-1992-016, :on 921208,reactor Tripped on High Pressurizer Pressure Due to Main Turbine Trip.Caused by Failure of Static Negative Sequence Time Over Current Relay.Faulty Relay Replaced W/Identical GE Relay (← links)
- 05000528/LER-1992-013, :on 920902,determined That Three Economizer Feedwater Isolation 4-way Valve Failures Probably Due to Mfg Defects.Caused by Improper Machining & Less than Acceptable Dedication Program.Also Reported Per Part 21 (← links)
- 05000528/LER-1992-014, :on 921008,discovered Operation in Excess of Licensed Condition for Thermal Power.Caused by Inaccurate Span Correction Factors.Operating Units Reduced Power to 99.5 Percent Power (← links)
- 05000528/LER-1992-008, :on 920508,discovered That Surveillance Requirement for Nonessential Auxiliary Feedwater Pump Not Performed.Caused by Personnel Error.Instruction Change Request Submitted (← links)
- 05000528/LER-1992-006, :on 920419,spurious Train a Containment Purge Isolation Actuation Sys Initiated on balance-of-plant Esfas. Caused by Radiation Monitor RU-37 Dropping Offline Due to Power Supply Failure.Power Supply Replaced (← links)
- 05000528/LER-1991-007, :on 910822,determined That Normal HVAC Sys Cooling to Various ESF Pump Rooms Not Adequate.Caused by Not Recognizing That Normal HVAC Sys Was Not 100 Percent Redundant to Some Components.Guidance Issued (← links)
- 05000528/LER-1992-002, :on 920117,TS Action Missed W/Radiation Monitor Inoperable.Caused by Personnel Error.Containment Air Grab Sample Was Taken & Analyzed (← links)
- 05000528/LER-1992-001, :on 920102,pressure Boundary Leak Led to Cold Shutdown Per TS 3.4.5.2.Caused by Crack in Prz Steam Space Instrument Nozzle.Pad Weld Made to Stop Leak & 7 Inconel 600 Nozzles to Be Replaced at Next Outage (← links)
- 05000528/LER-1991-011, :on 911029,determined That Design Basis App R Fire in Control Room Could Result in Loss of One Train B Essential Air Handling Unit.Caused by Failure of Original App R Design.Hourly Fire Watch Established (← links)
- 05000528/LER-1991-010, :on 911027,grid Perturbation Caused Main Turbine Control Sys to Fast Close & Immediately Reopen Turbine Control Valves.Caused by Lightning Strike on Feeder Line.Temporary Mod Installed (← links)
- 05000528/LER-1991-009, :on 910914,reactor Trip & Main Steam Isolation Signal ESF Occurred.Caused by High Steam Generator Level. Troubleshooting Performed,Economizer Valve Positioner Replaced,Tested & Returned to Svc (← links)
- 05000528/LER-1991-008, :on 910816,determined That Design Basis App R Fire in Control Room Could Result in Loss of Reactor Coolant Pump Seal Cooling & Seal Damage.Caused by Erroneous App R Evaluations.Continuous Fire Watch Established (← links)
- 05000528/LER-1991-006, :on 910517,ESF Actuation Occurred Due to Radiation Monitor Failure.Caused by Malfunctioning Central Processing Unit & Random Access Memory Board on Train B. Boards Replaced (← links)
- 05000528/LER-1991-004, :on 910320,supply Breaker Between non-Class IE 13.8 Kv Switchgear Buses Opened,Resulting in Loss of Power to Train a Class 1E 4.16 Kv Bus.Caused by Personnel Error. Preventive Maint Suspended (← links)
- 05000528/LER-1991-003, :on 910208,determined That Essential Spray Pond cross-connect Valves Not Verified in Correct Position. Caused by Failure to Meet TS Surveillance Requirements. Valve Positions Verified & Valves Locked Shut (← links)
- 05000528/LER-1991-001, :on 910110.determined That Postulated Break in Reactor Coolant Pump High Pressure Seal Cooler Could Result in RCS Leak Outside Containment.Caused by Tube Rupture in Seal Cooler.Rcs Activity Monitored (← links)
- 05000528/LER-1990-011-01, :on 901206,reactor Thermal Power Exceeded Limit.Caused by Insufficient Procedural Controls for Placing Ion Exchanger in Svc.Operating Procedure for Placing Ion Exchanger Into Svc Revised (← links)
- 05000528/LER-1990-010, :on 901012,ESF Actuation Caused by Calibr Step Omission in Work Document (← links)
- 05000528/LER-1990-006-02, :on 900814,reactor Trip Occurred Following Manual Turbine Trip & Phase B of Main Transformer Loosing Forced Cooling.Caused by Failure of Control Power Transformer.Transformer Replaced (← links)
- 05000528/LER-1990-007, :on 900617,determined That Safety Injection Tanks Vent Valves Provided Power Contrary to Tech Spec Requirements.Caused by Personnel Error.Precaution Incorporated Into Operating Procedure (← links)
- 05000528/LER-1990-008, :on 900620,main Steam Isolation Occurred Due to Procedural Inadequacy.Caused by Personnel Failure to Follow Procedures.Test Procedure Revised (← links)
- 05000528/LER-1990-009, :on 900620,identified That License Holders Had Not Received Biennial Medical re-exams,per 10CFR55.21.Caused by Inadequate Tracking Sys & Medical Personnel Failure to Follow Procedures.Procedures Developed (← links)
- 05000528/LER-1990-001, :on 900220,radiation Monitor Indication Spike Resulted in ESF Actuation.Caused by Noise in Radiation Monitor Common Ground Circuit & Cognitive Personnel Error. Mod Performed to Circuit & Personnel Counseled (← links)
- 05000528/LER-1990-003, :on 900320,log Power Channels Declared Inoperable When Plant Protection Cabinets Deenergized for Scheduled Maint.Caused by Personnel Error.Wiring in Cabinets Reworked & Cabinets Returned to Svc (← links)
- 05000528/LER-1989-013, Forwards Suppl 1 to LER 89-013-00.Rept Being Submitted to Include Info Requested by Part 21 (← links)
- 05000528/LER-1990-001-01, :on 900209,fuel Bldg Exhaust Ventilation high- Range Radiation Monitor Energized,Causing low-range Radiation Monitor to Spike & ESF Actuation.Caused by Noise in Circuit of Monitors.Channel B Bypassed (← links)
- 05000528/LER-1989-017, :on 891023,four Unsealed Penetrations in Unit 3 Seismic Gap Area Discovered During Visual Insp of 94 Ft Elevation Diesel Bldg Pipe Trenches.Fire Watches Established in All Units.Sealing of Penetrations Underway (← links)
- 05000528/LER-1989-024, :on 891212,test on Reactor Coolant Pump Motor 2A Caused Voltage Perturbation in Electrical Sys,Tripping Radiation Monitors.Caused by Abnormal Electrical Alignment. Operating Procedures for Pump Motors Revised (← links)
- 05000528/LER-1989-018, :on 891026,discovered That Containment Purge Valves Did Not Meet Local Leak Rate Testing Acceptance Criteria.Caused by Intergranular Stress Fracture.Spiral Pins Replaced.Reportable Per Part 21 (← links)
- 05000528/LER-1989-021, :on 891106 & 09,discovered That Locked High Radiation Area Gate Open & Unguarded,Contrary to Tech Spec 6.12.2 Requirements.Caused by Personnel Error.Gates Secured & Addl Locking Mechanisms Installed on Doors (← links)
- 05000528/LER-1989-020, :on 890907,emergency Diesel Generator B, Essential Spray Pond Pump B & Essential Cooling Water Pump B Started During Removal of Jumpers.Caused by Personnel Error. Maint Procedure Revised (← links)
- 05000528/LER-1989-007, :on 890412,discovered Two of Four Pressurizer Code Safety Valves Out of Tech Spec Tolerance of 2,500 Psia Plus or Minus 1%.Caused by Performance Limitation.Valves Adjusted & Retested Satisfactorily (← links)
- 05000528/LER-1988-006, :on 880321,determined That Allowable Surveillance Test Interval Had Been Exceeded for Incore Detector Sys.Caused by Personnel Error & Inadequate Programmatic Controls.Personnel Counseled (← links)
- 05000528/LER-1989-015, :on 890901,phase B Shunt Reactor on Devers Transmission Line Failed,Causing Ground Fault on 500 Kv Line & Release of Large Vol of Oil & Fire.Caused by Failure of Winding to Bushing.Fire Extinguished (← links)
- 05000528/LER-1989-006-01, :on 890731,containment Purge Isolation Actuation Signal Initiated Due to Loss of Power to Panel 1E-PNB-D26.Cause Not Identified.Power Restored & Radiation Monitor RU-38 Placed Back on Line (← links)
- 05000528/LER-1989-019, :on 890929,Train B of Fuel Bldg Essential Ventilation Actuation Sys Spuriously Actuated.Caused by Loose Connection Between Radiation Monitor Remote Indication & Control Unit Instrument Drawer & Cabinet (← links)
- 05000528/LER-1988-020, :on 881210,control Element Assemblies Slipped. Caused by Apparent Ground on Lower Lift Coil & Design Defect in Control Element Drive Mechanism Control Sys.Part 21 Related (← links)
- 05000528/LER-1989-005, :on 890412,determined That Deficiencies Identified by Control Components,Inc of Atmospheric Dump Valves Constituted Reportable Part 21 Condition.Caused by Improperly Seated Piston Ring.Valve Replaced (← links)
- 05000528/LER-1989-006-02, :on 890731,loss of Power to Panel 1E-PNB-D26 Caused Power to Remote Indicating & Control Unit & Train B Actuation Signal.Cause for Power Loss Being Investigated. Power Restored to Distribution Panel (← links)
- 05000528/LER-1988-010-01, :on 880706,ground Fault in 13.8 Kv Bus Caused Fire in Unit Auxiliary Transformer & Reactor Trip.Caused by Bullet Hole Point Faults in Phase Bus B Adjacent to Support Bar.Fire Extinguished & Bus Reenergized (← links)
- 05000528/LER-1989-008-02, :on 890714,internal Audit Revealed Cooling Tower Sludge Contained Low Level Amounts of Radioactivity. Caused by Lack of Sludge Sampling Before Landfill Disposal. Approval to Dispose of Sludge Requested (← links)
- 05000528/LER-1989-014, :on 890622,discovered That Seismic Monitor Had Been Disconnected & Inoperable Since 890422.Caused by Procedural Failure.Procedure for Removal of Reactor Coolant Pump Motor Being Revised to Alert Personnel (← links)
- 05000528/LER-1989-011, :on 890425,instrument & Control Technician Exited High Radiation Area W/O Using Alarm Dosimeter.Caused by Personnel Error.Technician Barred from Entry to Radiological Controlled Area (← links)
- 05000528/LER-1989-004-01, :on 890305,reactor Trip Occurred on Dnbr.Caused by Control Element Assembly Calculator Failure.Processor Board Replaced (← links)
- 05000528/LER-1989-003-01, :on 890217,preplanned Alternate Sampling Sys for Fuel Bldg Discovered Inoperable.Caused by Temporary & Permanent Electrical Loads in Excess of Circuit Capacity. Circuit Breaker Supplying Power Opened (← links)
- 05000528/LER-1988-025, :on 881201,discovered Surveillance Procedure Not Completed within Tech Specs Required Frequency.Caused by Inadequate Review of Amend.Surveillance Interval Revised to Be Consistent W/Amend (← links)
- 05000528/LER-1988-002-01, :on 880122,calculations Indicate That High Log Trip Setpoints Were Set Contrary to Allowable Setpoint. Caused by Inadequate Programmatic Controls to Review Design Changes from Core Reload.Setpoints Reset (← links)
- 05000528/LER-1986-063-01, :on 860920,discovered That Error in Radioactive Source Tracking Sys Resulted in Radioactive Sealed Source Not Being Leak Tested Once Per 6 Months.Caused by Personnel Error.Entries Verified (← links)
- 05000528/LER-1988-014, Discusses Reportability Determination of LER-88-014-00 Re Inoperability of Unit 2 Main Steam Safety Valves,Per 10CFR50.73.Util Believes Event Caused by Misinterpretation of Guidance Provided in 10CFR50.73 & NUREG-1022 (← links)
- 05000528/LER-1988-017, :on 880529,Trains a & B Essential Chillers Discovered Inoperable Due to Shut Root Isolation Valves for Transmitter.Caused by Personnel Errors While Affixing Warning Labels Near Valves (← links)
- 05000528/LER-1988-021, :on 880821,reactor Trip Occurred Due to High Pressurizer Pressure.Caused by Failure of Microswitch in Stator Coolant Flow Trip Circuit.Microswitch Replaced.W/ (← links)
- 05000528/LER-1988-016, :on 880514,reactor Trip Occurred.Caused by Nonconservative Operator Performance During Reactor Startup. Info Utilized for Estimated Critical Condition Will Be Corrected (← links)
- 05000528/LER-1988-022, :on 880319,bolting Which Secures Gasket Retainer Plate Fractured.Caused by Bolts Not Meeting Spec Requirements.Changes Being Implemented to Replace Matl.W/ (← links)
- 05000528/LER-1988-015, :on 880512,automatic Actuation of Reactor Protection Sys Occurred.Power Supply Found to Be Varying in Amplitude Intermittently Which Could Cause Varying Removal & Reinstatement of Buck & Boost Voltage (← links)
- 05000528/LER-1988-013, :on 880325,essential Motor Driven Auxiliary Feedwater Pump Failed to Achieve Rated Pressure.Caused by Stress Corrosion Cracking/Hydrogen Embrittlement.Matl Changes Initiated.Part 21 Related (← links)
- 05000528/LER-1988-004-01, :on 880229,Mode 4 Entered W/Hpsi Injection Pumps Inoperable.Caused by Procedural Inadequacy.Procedure Revised to Include Steps to Ensure That HPSI Pumps Returned to Operable Status Prior to Entering Mode 4 (← links)
- 05000528/LER-1988-008, :on 880212,RCS Leakage Monitor Declared Inoperable Due to Notification of Particulate change-out Excess.Caused by Personnel error.Change-out Periodicity Revised to Once Per 24 H (← links)
- 05000528/LER-1987-018, :on 870827,reactor Trip Occurred Due to Axial Shape Index of Reactor Core.Caused by Deficient Procedure. Procedural Enhancements Implemented (← links)
- 05000528/LER-1988-005, :on 880123,backhoe Operator Inadvertently Damaged Post Indication Valve (Piv)(Kp)(Isv) & Caused Fire Suppression Water to Discharge Into Protected Area.Caused by Inadequate Procedure.Procedures Implemented (← links)
- 05000528/LER-1987-028, :on 871217,inability to Meet Tech Spec Requirements Encountered Due to Failure to Retain Monitor Samples.Caused by Personnel Error.Technician Disciplined & Chemistry Dept Will Receive Training (← links)
- 05000528/LER-1987-016, :on 870609,both Trains of ESF Pump Room Air Exhaust Cleanup Sys Inoperable.Caused by Personnel Error. Operations Dept Experience Rept & Night Orders Developed & Issued & Warning Tags Placed on Equipment (← links)
- 05000528/LER-1987-026, :on 871027,automatic Actuation of Balance of Plant ESF Occurred Due to Inadvertent Containment Purge Isolated Actuation Signal.Caused by Personnel Error. Responsible Individual Will Be Reinstructed (← links)
- 05000528/LER-1987-024, :on 870902,two Dma Interface Cards Providing Input to Core Operating Limit Supervisory Sys Found Incorrectly Installed.Caused by Cognitive Personnel Error. Computer Technician Counseled (← links)
- 05000528/LER-1987-017-01, :on 870630,auxiliary Operator Entered High Radiation Area W/O Radiation Monitoring Devices Required by Tech Specs.Caused by Personnel Error.Exposure within 10CFR20 Limits.Disciplinary Action Taken (← links)
- 05000528/LER-1987-009-01, :on 870604,inadvertent Control Room Essential Filtration Actuation Occurred Due to Radiation Monitor Pump Cycling.Caused by Motor Drawing Too Much Current.Ground to Motor & Radiation Monitor Separated (← links)
- 05000528/LER-1987-002, :on 870317,continuous Fire Watch Not Established within Required Time,Per Tech Spec 3.7.11.2 Action A.Caused by Personnel Error.Fire Protection Personnel Counseled on Importance of Proper Performance (← links)
- 05000528/LER-1987-008, :on 870314,fire Patrol Performed Six Hours Late Due to Log Omission.Caused by Cognitive Personnel Error.Fire Protection Technician Counseled on Area of Responsibility (← links)
- 05000528/LER-1987-005-01, :on 870302,while Unit in Mode 4,hourly Fire Watch Patrol Not Performed in Accordance W/Tech Spec 3.7.12. Caused by Cognitive Personnel Error.Foreman Disciplined & Instructed on Importance of Fire Watches (← links)
- 05000528/LER-1989-023, :on 891208,ESF Equipment Room Essential Ventilation Fans Declared Inoperable When Turning Valves Determined Not to Be Seismically Qualified.Caused by Inadequate Program.Bracing Installed on Duct (← links)
- 05000528/LER-1988-001-01, :on 880104,special Rept Not Submitted as Required by Tech Spec 3.3.3.3.Special Rept Required to Rept Seismic Monitoring Sys Inoperable Longer than 30 Days. Caused by Personnel Error.Cause Under Review (← links)
- 05000528/LER-1987-027, :on 870728,unit Entered Mode 4 (Hot Shutdown) W/O Meeting Surveillance Requirements for Containment Spray Sys Train B Pump.Caused by Personnel Error.Train a Pump Tests Verified & Procedure Revised (← links)
- 05000528/LER-1987-021, :on 870729,control Room Essential Filtration Actuation Initiated on Channels a & B of Esfas.Caused by Voltage Spike.Monitor Reset,Returning Setpoint to Specified Value (← links)
- 05000528/LER-1987-013, :on 870408,Tech Spec 3.0.3 Entered Due to Inoperability of ESF Pump Room Air Exhaust Sys.Caused by Cognitive Personnel Error.Memo Sent to Onsite Managers Reminding Personnel of Responsibilities (← links)
- 05000528/LER-1987-011, :on 870331,while in Mode 1,fire Watch Round Not Performed Per Tech Spec 3.7.12.Caused by Cognitive Personnel Error.Fire Watch Patrolman Counseled on Safety Warnings & Scheduled for Addl Training (← links)
- 05000528/LER-1987-004, :on 870323,discovered That Spectrum Analysis Not Done for Three Grab Samples Taken on 870320 from Turbine Bldg Sump & Condenser Area Sump.Caused by Personnel Error. Event Discussed W/Chemistry Personnel (← links)
- 05000528/LER-1917-001, Regarding Essential Chiller B Inoperable Due to Refrigerant Leak Resulting in Safety System Functional Failure (← links)
- 05000528/LER-2016-002, Regarding Reactor Trip Due to Partially Open Pressurizer Main Spray Valve (← links)
- 05000528/LER-2016-001, Leakage from Reactor Coolant Pump 2B Discharge Pipe Instrument Nozzle (← links)
- 05000528/LER-2013-004, Regarding Condition Prohibited by Technical Specification 3.7.2 Due to an Inoperable Main Steam Isolation Valve (MSIV) (← links)
- 05000528/LER-2013-003, Appendix R Unanalyzed Condition - Direct Current Ammeter Circuits Without Overcurrent Protection (← links)
- 05000528/LER-2013-002, Regarding Inoperable Systems Due to Defective Relays Reported Under Part 21 (← links)
- 05000528/LER-2013-001, Unanalyzed Condition Due to Spent Fuel Pool Criticality Analysis of Record Not Updated for Power Uprate (← links)
- 05000528/LER-2012-006, For Palo Verde, Unit 1 Regarding Safety Injection System Check Valve Testing Could Have Resulted in Less than Required Injection Flow (← links)
- 05000528/LER-2012-005, Condition Prohibited by Technical Specifications Due to Remote Shutdown System Control Circuit Deficiencies (← links)
- 05000528/LER-2012-004, Regarding Essential Spray Pond Pump Actuation Due to a Control Room Essential Filtration Actuation Signal (← links)
- 05000528/LER-2012-003, Regarding Main Steam Isolation Valve Actuator Train Inoperable Due to Low Nitrogen Pre-Charge Pressure (← links)
- 05000528/LER-2012-002, Supported Systems Not Considered Inoperable with Support Equipment Inoperable (← links)
- 05000528/LER-2012-001, For Palo Verde, Unit 1, Regarding Technical Specification LCO 3.1.7 Incorrect Pdil Setpoint Values (← links)
- 05000528/LER-2011-005, For Palo Verde, Unit 1, Regarding Manual Reactor Trip Due to Slipped Control Elemental Assemblies (← links)
- 05000528/LER-2011-001, Regarding Corrected Copy of APS Cover Letter No. 102-06349-DCM/FJO (← links)
- 05000528/LER-2011-004, Regarding Reactor Trip Due to Reactor Protection System Actuation Which Resulted from a Dropped CEA (← links)
- 05000528/LER-2011-003, For Palo Verde, Unit 1, Regarding Control Room Essential Filtration Misalignment Resulting in Condition Prohibited by Technical Specifications (← links)
- 05000528/LER-2011-002, For Palo Verde, Unit 1, Regarding Nonconforming Condition Renders the Qualified Safety Parameter Display System Inoperable (← links)
- 05000528/LER-2010-002, Regarding Main Steam Isolation Bypass Valve Calculation Error Resulting in Operation Prohibited by Tech Spec (← links)
- 05000528/LER-2010-003, Regarding Technical Specification Violation - Loss of Containment Building Equipment Hatch Closure Capability (← links)
- 05000528/LER-2010-001, For Palo Verde, Unit 1 Re Automatic Reactor Trip Due to a Loss of a Non-Class 13.8 Kv (Calvert) Bus (← links)
- 05000528/LER-2009-002, Will Not Be Used, Event Subsequently Determined Not to Be Reportable (← links)
- 05000528/LER-2009-003, Regarding Surveillance Test Procedure Inadequate to Meet the Requirements of TS (← links)
- 05000528/LER-2009-001, For Palo Verde, Units 1, 2, & 3 - Regarding Safety Injection System Recirculation Alignment Results in Unanalyzed Condition (← links)
- 05000528/LER-2008-003, Regarding Technical Specification Required Shutdown - Safety Injection Tank 1A Inoperable (← links)
- 05000528/LER-2008-001, Regarding Inadequate Surveillance Test Procedure Resulting in Failure to Meet TS Requirements (← links)
- 05000528/LER-2007-007, Regarding Engineered Safety Feature Actuation and Required Shutdown Due to Failed Diode in Actuation Circuitry (← links)
- 05000528/LER-2007-005, Inadequate Surveillance Test Procedure Resulted in Failure to Meet Surveillance Requirement (← links)
- 05000528/LER-2007-004, Inadequate Surveillance Test Procedure Resulted in Failure to Meet Surveillance Requirement (← links)
- 05000528/LER-2007-001, Regarding Technical Specification Prohibited Condition Due to Check Valve Not Fully Seated (← links)
- 05000528/LER-2007-002, Re Train B Class 1E Pressurizer Backup Heater Control Circuit Would Not Be Properly Isolated for a Control Room Fire Event (← links)
- 05000528/LER-2007-003, Regarding Inadequate Surveillance Test Procedure Resulting in Failure to Meet TS Requirements (← links)
- 05000528/LER-2006-006, Re Reactor Trip Due to Core Protection Calculator Generated Low Departure from Nuclear Boiling Ratio (DNBR) Trip Signal (← links)
- 05000528/LER-2006-007, Re Emergency Diesel Generator Actuation on Loss of Power to B Train 4.16kv Buses (← links)
- 05000528/LER-2006-005, Re Technical Specification Prohibited Condition Due to Check Valve Not Seated (← links)
- 05000528/LER-2006-004, Re TS Required Reactor Shutdown on Failure of the Class Pressurizer Heaters to Be Able to Meet Their Mission Time (← links)
- 05000528/LER-2006-003, Re Emergency Diesel Generator Actuation on Loss of Power to a Train 4.16KV Bus (← links)
- 05000528/LER-2005-009, Re Technical Specification Violation for Operation Without Both Reactor Coolant System Loops Operable (← links)
- 05000528/LER-2006-001, Re Containment Spray Inoperable in Mode 4 with RCS Pressure Greater than 385 Psla (← links)
- 05000528/LER-2006-002, Re Mode 3 Entry Without the Required Number of Pressurizer Heater Groups Operable (← links)
- 05000528/LER-2005-007, Regarding Potential Loss of Low Pressure Safety Injection (Lps) Due to a Seismic Event (← links)
- 05000528/LER-2005-008, Re Inverter Failure - Technical Specification Violation (← links)
- 05000528/LER-2005-001-01, Re Actuation of an Unit 1 Emergency Diesel Generator (EDG) and Plant Shutdown Required by TS (← links)
- 05000528/LER-2005-006, Re TS Required Reactor Shutdown on EDG a Failure to Start During Post Maintenance Testing (← links)
- 05000528/LER-2005-005, Re Unplanned Reactor Trip and Engineered Safety Feature Actuation (← links)
- 05000528/LER-2005-004, Re Technical Specification Required Reactor Shutdown on EDG B Voltage Regulator Failure (← links)
- 05000528/LER-2005-003, Regarding Calibration Method That Might Have Failed to Provide Reactor Protection During Low Power Operation (← links)
- 05000528/LER-2005-002, Regarding Technical Specification Violation: Mode Change with Safety Injection Valve Not in Its Required Position (← links)
- 05000528/LER-2004-009, Supplemental Report to Licensee Event Report 2004-009-00 (← links)
- 05000528/LER-2004-011, Re Missed Surveillance Requirements for Containment Lvs Test/Drain Valves (← links)
- 05000528/LER-2004-008, Regarding Improper Contact Configuration on Containment Isolation Valve (← links)
- 05000528/LER-2004-006, Regarding a Loss of Offsite Power (LOOP) and the Subsequent Reactor Trip (← links)
- 05000528/LER-2004-007, Regarding Exceeding the Maximum Power Level Specified in Operating License Condition 2.C(1) (← links)
- 05000528/LER-2004-005, Re Missed Surveillance Tests on Shutdown Cooling Valve RCS Pressure Interlocks (← links)
- 05000528/LER-2004-004, Re Missed Surveillance Requirement for Temperature Detector Calibration (← links)
- 05000528/LER-2004-003, Unit I, Regarding Manual Reactor Trip - Slipped Control Element Assembly (← links)
- 05000528/LER-2004-002, Technical Specification Violation - Exceeded 20% RTP with LCO Not Met (← links)
- 05000528/LER-2004-001, Regarding Reactor Shutdown Due to Reactor Coolant System Pressure Boundary Leakage (← links)
- 05000528/LER-2003-003, Regarding Technical Specification Violation for Failure to Meet Shutdown Cooling Trains Operable Action Statements (← links)
- 05000528/LER-2003-004-04, Regarding Cracks in Contact Block of Main Control Room Handswitches Result in Inoperable Equipment (← links)
- 05000528/LER-2003-002, Manual Reactor Trip Due to Degraded Main Condenser Tube Plug (← links)
- 05000528/LER-2003-001, From Palo Verde, Unit 1 Regarding Pressurizer Safety Valve as Found Lift Pressure Outside of TS Limits (← links)
- 05000528/LER-2002-001, Regarding Reactor Trip Due to Core Protection Calculators Generating a CEA Deviation Trip Signal (← links)
- 05000528/LER-2001-005, Re Inadequate Surveillance Test for Time Response Testing of Hl Log Power Trip Function (← links)
- 05000528/LER-2025-001, Unit 1 Loss of High Pressure Safety Injection Safety Function (← links)
- 05000528/LER-2025-003, Specified System Actuation Due to Loss of Power (Lop)/Load Shed (LS) Signal (← links)
- 05000528/LER-2025-004, Train a Emergency Diesel Generator Emergency Stop with System Actuation (← links)