Pages that link to "05000255/LER-2007-001, Failure to Perform Offsite Power Source Check"
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The following pages link to 05000255/LER-2007-001, Failure to Perform Offsite Power Source Check:
Displayed 10 items.
- 05000255/LER-2007-001 (redirect page) (← links)
- 05000529/LER-2007-004 (← links)
- 05000315/LER-2007-002 (← links)
- 05000255/LER-2002-003 (← links)
- 05000413/LER-2007-004 (← links)
- 05000346/LER-2007-001 (← links)
- 05000335/LER-2007-003 (← links)
- 05000309/LER-2007-001 (← links)
- 05000266/LER-2007-002 (← links)
- 05000255/LER-2006-001 (← links)
- 05000255/LER-2001-002 (← links)
- 05000255/LER-2001-001 (← links)
- 05000255/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000255/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000255/LER-1982-024, Forwards LER 82-024/01X-1 (← links)
- 05000255/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000255/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000255/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000255/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000255/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000255/LER-1982-023, Forwards LER 82-023/01T-0 (← links)
- 05000255/LER-1981-011, Forwards LER 81-011/03L-0 (← links)
- 05000255/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000255/LER-1982-025, Forwards LER 82-025/01T-0 (← links)
- 05000255/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000255/LER-1981-001, Forwards LER 81-001/01T-0 (← links)
- 05000255/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000255/LER-1983-007, Forwards LER 83-007/01T-0 (← links)
- 05000255/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000255/LER-1983-001, Forwards LER 83-001/01T-0 (← links)
- 05000255/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000255/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000255/LER-1983-021, Forwards LER 83-021/03L-0 (← links)
- 05000255/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000255/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000255/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000255/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000255/LER-1982-042, Forwards LER 82-042/01T-0 (← links)
- 05000255/LER-1982-039, Forwards LER 82-039/01T-0 (← links)
- 05000255/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000255/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000255/LER-1976-016, Advises That LER 76-016 Re MSIVs Not Reportable Since Performance of One Valve Not Assumed in SAR Accident Analysis.Presently Installed MSIV Design Study Rept Will Be Forwarded Upon Completion (← links)
- 05000255/LER-1976-020, Advises That LER 76-020 Cancelled.Potential Loss of Four Primary Coolant Pumps Due to Flooding Caused by Seiche Not Unreviewed Safety Issue (← links)
- 05000255/LER-1982-045, Forwards LER 82-045/01T-0 (← links)
- 05000255/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000255/LER-1983-027, Forwards LER 83-027/01T-0 (← links)
- 05000255/LER-1983-026, Forwards LER 83-026/01T-0 (← links)
- 05000255/LER-1983-023, Forwards LER 83-023/01T-0 (← links)
- 05000255/LER-1983-020, Forwards LER 83-020/01T-0 (← links)
- 05000255/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000255/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000255/LER-1983-019, Forwards LER 83-019/01T-0 (← links)
- 05000255/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000255/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000255/LER-1983-008, Forwards LER 83-008/01T-0 (← links)
- 05000255/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000255/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000255/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000255/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000255/LER-1950-255, FOIA Request for 851118 LER 50-255/85-23 on Possible Low Temp Overpressure Sys Setpoint Error to Be Placed in PDR (← links)
- 05000255/LER-1983-022, Forwards LER 83-022/01T-0 (← links)
- 05000255/LER-1982-033, Forwards Revised LER 82-033/03X-1 (← links)
- 05000255/LER-1987-017, Forwards Semiannual Radioactive Effluent Release Rept... Jan-June 1987 & Corrected Semiannual Rept for Jul-Dec 1986. LER 87-017 Also Encl Due to Corrective Action Taken Re Failure to Make Flow Rate Estimates During Release (← links)
- 05000255/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000255/LER-2021-001, Atmospheric Steam Dump Valves Inoperable Due to Relay Failure (← links)
- 05000255/LER-2020-002, Indications Identified in Reactor Pressure Vessel Head Nozzle Penetrations (← links)
- 05000255/LER-2020-001, The Palisades Nuclear Plant Re Service Water System Inoperable for Longer than Allowed by Technical Specifications (← links)
- 05000255/LER-1984-021, :on 840915,primary Coolant Pump P-50C Shut Down Due to Failure of All Seals Except Vapor Seals.Caused by Failure to Torque Impeller Bolts Properly.Procedures for Assembly of Pump Upgraded (← links)
- 05000255/LER-1998-005, :on 980217,actuation of Containment Isolation Occurred.Caused by Inadvertent Containment High Radiation Signal.Plant Status Evaluated & Equipment Lineups Restored (← links)
- 05000255/LER-1998-004, :on 980216,notified Security That Escorted Visitor Had Inserted Her Keycard Into Exiting Turnstile Card Reader Upside Down.Caused by Primarily to Card Reader bleed- Through.Initiated Quarterly Surveillance to Verify Card (← links)
- 05000255/LER-1997-013, :on 971110,determined Check Valves in Min Flow Recirculation Piping from Discharge of Each HPSI Pump Were Not Periodically Tested to Confirm Closure Capability.Caused by Inadequate Understanding.Database Revised (← links)
- 05000255/LER-1998-006, :on 980305,personnel Determined That Operating Procedures Lacked Specific Guidance.Caused by Inadequate Procedures.Alarm Response Procedure 7 Was Revised (← links)
- 05000255/LER-1986-036, :on 860930,discovered That Svc Water Sys Pumps Incapable of Meeting Flow/Head Values of 8,000 Gpm Per Fsar. Caused by Installation of Incorrect Pump Impellers.Periodic Testing Will Be Implemented (← links)
- 05000255/LER-1986-038, :on 861108,while in Cold Shutdown,Radioactive Liquid Effluent Release Occurred.Caused by Shift Supervisor Error.Shift Supervisors Counseled (← links)
- 05000255/LER-1986-032, :on 860825,testing Disclosed Component Cooling Water (CCW) Flow to HX Less than Values Specified in Fsar. Caused by Underdesigned Ccwhxs Which Serve to Limit Flow to Components Downstream.Analysis Underway (← links)
- 05000255/LER-1986-033, :on 860825,discovered That LPSI Pump P-67B Flow Did Not Meet FSAR Specs.Caused by Impeller Installed in Pump in 1983.Impeller Replaced.Performance Tests Indicate That Pump Now Satisfies FSAR Specs (← links)
- 05000255/LER-1986-034, :on 860826,design Deficiency Noted Re Postulated Bus Failure Resulting in Inoperable Electronic Switching Sys.Design Error Corrected Prior to start-up by Modifying Recirculation Actuation Sys (← links)
- 05000255/LER-1986-037, :on 861022,QA Audit Determined That Compliance W/Tech Specs for high-range Noble Gas Monitor Not Possible Since Monitor Does Not Physically Contain Specified Functions.Tech Specs Will Be Clarified (← links)
- 05000255/LER-1987-005, :on 860216,lifted Relief Valve on Steam Generator Secondary Manway Identified,Constituting Failed Containment Penetration.Caused by Failure of Inner Manway Gasket & Improper Valve Installation (← links)
- 05000255/LER-1987-001, :on 870114,plant Engineering Personnel Discovered Four Containment Penetrations Did Not Employ Redundant Isolation Logic.Caused by Architect/Engineer Error.Mod Being Performed (← links)
- 05000255/LER-1987-004, :on 870123,charging Pump P-55A Declared Inoperable.Caused by Sporadic Mechanical Operation of Circuit Breaker.On 870205,ITE Circuit Breaker Models K225 & K600 Found Not Functionally Interchangeable (← links)
- 05000255/LER-1987-003, :on 870119,discovered Seven Valve Operators Lacked T-drains in End Bell of Motor Housing.Caused by Motor T-drains Improperly Installed.Procedure Established to Provide Administrative Controls Over Equipment (← links)
- 05000255/LER-1987-001-01, :on 870114,containment Penetrations Associated W/Containment Hydrogen Monitoring Sys Did Not Employ Redundant Isolation Logic.Caused by Sys Design Description Not Being Implemented as Prescribed (← links)
- 05000255/LER-1987-002, :on 870115,noise Spike in Nuclear Instrumentation Resulted in Inadvertent Reactor Protection Sys Actuation.Caused by Corroded Cable Connector Pin at Interface of Detector Element.Element Replaced (← links)
- 05000255/LER-1986-035, :on 860830,discovered That Containment Purge Supply Isolation Valves CV-1813 & CV-1814 Not Truly in Electrically Locked Closed Condition.Caused by Circuitry Design Feature.Sys Modified (← links)
- 05000255/LER-1986-013, :on 860225,reactor Protection Sys Actuation Occurred from Spike in Nuclear Instrument Channel.Caused by Reenergization of Preferred Ac Bus During Manual Transfer. Procedural Controls Instituted (← links)
- 05000255/LER-1986-031, :on 860821,excessive Vibration Resulting in Failure of Containment Air Cooler Sys Occurred.Apparently Caused by Deterioration of Fan Motor Bearings.Bearing Replacement Planned to Restore Fan Motors (← links)
- 05000255/LER-1986-030, :on 860818,inadvertent Right Channel Safety Injection Signal Occurred During Test of Plant Mod.Caused by Inadequate Procedure & Personnel Error.Administrative Procedure Revised & Personnel Counseled (← links)
- 05000255/LER-1986-026, :on 860815,inadvertent Emergency Diesel Generator Actuation Occurred Due to Open Link in Circuitry. Caused by Personnel Error.Work Group Advised to Pay Attention to Detail (← links)
- 05000255/LER-1986-028, :on 860826,automatic Emergency Diesel Generator Actuation Occurred.Caused by Lightning Strike.Potential Transformer Fuses Replaced & Buses 1-D & 1-E (EA) Repowered W/Normal Offsite Power (← links)
- 05000255/LER-1986-029, :on 860827,inadvertent Automatic Actuation of Emergency Diesel Generators Occurred.Caused by Improper Removal of Link.Evolution for Bypassing Emergency Diesel Generator Automatic Start Proceduralized (← links)
- 05000255/LER-1986-025, :on 860815,during Shutdown,Review Determined That Three Charging Pumps of Boric Acid Injection Flow Path Inoperable.Caused by Tech Spec Misinterpretation by Operators.Pump Declared Operable (← links)
- 05000255/LER-1986-024, :on 860804,during Cold Shutdown,Discovered Insufficient Svc Water Flow Through Containment Air Coolers. Caused by Improper Adjustment of Valve Actuators.Actuators Adjusted to Facilitate Proper Operation (← links)
- 05000255/LER-1987-007, :on 870216,max Hypothetical Accident Safety Analysis Discrepancy Identified.Caused by Incorrectly Identified Calculational Assumptions Re Time for Introduction of Hydrazine Spray Water (← links)
- 05000255/LER-1987-006, :on 870213,inadvertent Low Temp Overpressure Protection Sys Actuation Occurred.Caused by Electrical Spike in Channel a Pressure Indication Circuitry.Procedural Controls Instituted to Prevent Recurrence (← links)
- 05000255/LER-1985-007, :on 850621,safety Injection Tank (SIT) & HPSI Automatic Valve Concurrently Inoperable.Sit Inoperable Due to Expected Low Level Condition.Valve Inoperable Due to Failed Control Switch.New Switches Installed (← links)
- 05000255/LER-1986-027, :on 860823,inadvertent Emergency Diesel Generator Actuation Occurred.Caused by Error in Written Work Instructions Provided to Operators.Necessity for Close Attention to Detail Emphasized (← links)
- 05000255/LER-1986-023, :on 860724,design Problem Discovered Re Actuating Mechanism for Equalizing Valves on Containment Bldg Escape Airlock.Caused by Error in Actuating Cams Design.Cams Modified (← links)
- 05000255/LER-1999-001, :on 990310,noted Failure to Perform TS Surveillance Channel Check of Auxiliary Feedwater Flow Indication.Caused by Misinterpretation of Definition of Channel Check.Implementing Procedure Has Been Revised (← links)
- 05000255/LER-1983-022-01, /01T-0:on 830411,sample from T-82D Safety Injection Tank Showed Boron Concentration Below Tech Spec Limit.Caused by Minor Leak Past Loop Check Valve & Safety Injection Tank Check Valve or Fill & Drain Valve (← links)
- 05000255/LER-1986-015-01, :on 860326,turbine Generator Trip Occurred, Resulting in Reactor Trip Due to Loss of Load.Cause Not Determined.Evaluation Continuing (← links)
- 05000255/LER-1986-004-01, Forwards LER 86-004-01 Re Failure of Main Steam Safety Relief Valves to Meet as Found Acceptance Criteria (← links)
- 05000255/LER-1986-021, :on 860624,technicians Discovered Power Supply to Containment Floor Water Level Instruments Deenergized, Rendering Instruments Inoperable.Caused by Inadequate Calibr Procedure.Procedure Will Be Revised (← links)
- 05000255/LER-1998-002, :on 980112,potential Challenge to Channel Separation Was Noted.Caused by Inadequate of Temporary Mod. Specific Controls for Future Temporary Configuration Alterations Have Been Incorporated Into Plant Procedures (← links)
- 05000255/LER-1998-003, :on 980113,watertight Door Were Found Improperly Latched.Cause Has Not Been Determined.Door 59 Was Verified Closed & Was Properly Latched (← links)
- 05000255/LER-1998-014, :on 981227,control Rod Drive Seal Housing Leak Was Noted.Caused by Transgranular Stress Corrosion Cracking. Faulted Control Rod drive-2 Seal Housing Was Replaced (← links)
- 05000255/LER-1998-001, :on 980101,large Leak of CCW During Power Operation Was Noted.Caused by Failure of Flanged Joint Rubber Gasket.Ccw Sys Was Refilled,Vented & Chemistry Restored to Normal (← links)
- 05000255/LER-1998-011, :on 981217,inadequate Lube Oil Collection Sys for Primary Coolant Pumps Were Noted.Caused by Inadequate Design Change Process.Exemption from 10CFR50,App R Was Pursued (← links)
- 05000255/LER-1997-012, :on 971017,deenergized Control Rods While in Power Operation.Caused by Failure of Individual Barriers to Prevent Inadequate Performance.Post Maint Testing Was Performed.Pages 5,6 & 7 of Incoming Submittal Not Included (← links)
- 05000255/LER-1986-018, :on 860519,automatic Reactor Trip Occurred Due to High Pressurizer Pressure.Caused by Power Supply Failure in Turbine electro-hydraulic Control Sys Due to Ac Line Noise.Wiring Rerouted.Power Supply Shielded (← links)
- 05000255/LER-1998-012, :on 981215,discovered That MSIVs Were Slightly Open Based on Local Stem Position.Caused by High Packing Friction Introduced by Packing Replacement During 1998 Rfo. Completed Actions to Assure MSIVs Will Fully Close (← links)
- 05000255/LER-1985-019, :on 850930,review of Tech Spec Surveillance Test Procedures Identified Deficiency Re Failure to Verify Containment Isolation Initiation Due to Containment High Radiation Signal.Caused by Inadequate Review (← links)
- 05000255/LER-1986-017, :on 860410,excess Primary Coolant Leakage Detected.Plant Placed in Hot Shutdown.Caused by Failure of Valves RV-2006,PRV-1067,-1068 & -1072 to Seat Fully.Valves Repaired & Reseated (← links)
- 05000255/LER-1986-016-01, :on 860310,LPSI Pump Inadvertently Started. Caused by Closure at Corresponding Pair of Contacts on DBA Sequencer During Cleaning.Precautionary Note Added to Contact Closure Maint Procedure (← links)
- 05000255/LER-1986-016, :on 860310,LPSI Pump P-67B Inadvertently Started.Caused by Closing Corresponding Pair of Contacts on DBA Sequencer During Cleaning Procedure.New Tool Used During Cleaning.Incident Discussed W/Personnel (← links)
- 05000255/LER-1986-008, :on 860126,during Unit Shutdown Regular Trip & Containment Isolation Occurred.Caused by Tripping Output Breaker on Preferred Ac Bus Y30.Event Reviewed W/Personnel (← links)
- 05000255/LER-1986-006, :on 860125,power to 2,400-volt Bus 1C Lost During Transfer Attempt Between Station Power Breakers. Caused by Failure of Personnel to Recognize That Breaker Receiving Power Transfer in Test Position (← links)
- 05000255/LER-1986-007, :on 860125,wrong Connector Pulled on Pressure Indicator Resulting in Loss of Safety Injection Block Signal & Initiation of Safety Injection Signal.Caused by Personnel Error.Affected Personnel Counseled (← links)
- 05000255/LER-1986-005, :on 860109,review of Auxiliary Feedwater Sys Flow Requirements Revealed Discrepancy Between Known Flow & Flow Requirements.Caused by Misrepresentation of Existing FSAR Design Basis Flow.Fsar Revised (← links)
- 05000255/LER-1996-014, :on 961124,Class 1E Raychem Cable Splices Were Installed Incorrectly.Caused by Inadequate Procedure.Splices Were Either Confirmed to Be Acceptable by Field Insp or Were Replaced W/Correctly Installed Splices (← links)
- 05000255/LER-1981-009-03, /03L-0:on 810115,power Conversion Sys Sample Revealed Dose Equivalent I-131 to Be in Excess of Tech Spec. Caused by Low Level Cladding Failure Combined W/Transient Conditions Following Plant Trip (← links)
- 05000255/LER-1978-030-01, /01T on 780828:During Cooldown of the Reactor,The Containment Bldg Was Ventilated Thru the Purge Supply & Exhaust Valves.Improper Tagging Caused Valves to Be Open & Containment Integrity Not Met. (Encl to 7809190170) (← links)
- 05000255/LER-1978-030, Forwards LER 78-030/01T on 780828 (← links)
- 05000255/LER-1986-010, :on 860209,pipe Support Discovered Missing from Integrated Leak Rate Test Instrument Line.Cause Assumed to Be Removal of Hanger During Removal of Integrated Leak Rate Test Instrumentation Panel in 1981 (← links)
- 05000255/LER-1985-032, :on 851214,15 & 21,containment Isolation Sys Actuated.Caused by Increase in Radiation Levels.Temporary Sign Posted Near Monitors to Limit Transportation of Radioactive Matl Near Monitors (← links)
- 05000255/LER-1986-014, :on 860227,automatic Start of Both Emergency Diesel Generators Occurred.Caused by Personnel Error During Maint on auto-stop Oil Sys.Repair Group & Responsible Engineer Will Be Counseled on Occurrence (← links)
- 05000255/LER-1986-012, :on 860221,vol of Oil in Fuel Oil Storage Tank Reduced Below Tech Specs.Vendor Truck Arrived & Departed W/O Delivery Due to Adverse Road Conditions.Alternate Delivery Made.Security & Vendor Notified (← links)
- 05000255/LER-1985-030, :on 851223,mod Work on Hfa Relays Resulted in Unexpected Containment Isolation Signal.Caused by Inadequate Procedure.Procedure Changed to Allow Relays to Remain Energized During Replacement (← links)
- 05000255/LER-1986-009, :on 860106 & 08,watertight Fire Doors to safety-related Equipment Rooms Found Open.Caused by Personnel Failure to Follow Requirements for Fire Doors. Personnel Counseled (← links)
- 05000255/LER-1985-029, :on 851204,results of Surveillance Test for Local Leak Rate Testing Indicated That Leak Rate Outside Tech Spec Limits.Cause Unknown.Repair of Primary Coolant Sample Valves Performed (← links)
- 05000255/LER-1985-017, :on 850909,review of Electrical Equipment Qualification Determined Engineered Safeguards Room Cooler Temp Control Switches Did Not Meet Schedule Requirements of 10CFR50.49.Caused by Administrative Error (← links)
- 05000255/LER-1985-020, :on 851008,discovered That Scheduled Date for Main Steam & Feedwater Sys Hydrostatic Test Exceeded ASME Required Time Interval.Caused by Misinterpretation of Requirements.Review Performed (← links)
- 05000255/LER-1985-021, :on 851009,no Licensed Senior Operators Present in Control Room for Approx 5 Minutes.Caused by Mistaken Belief That Both Senior Operators Received Ack Before Leaving Control Room (← links)
- 05000255/LER-1985-024, :on 851108,concurrently Inoperable LPSI Pump & Safety Injection Tank (SIT) Resulted in Condition in Excess of Tech Spec Requirements.Caused by Low Boron Concentration Forcing Removal of SIT from Svc (← links)
- 05000255/LER-1985-018, :on 850914,calibr Check Determined Seven Pressurizer Pressure Transmitters Outside Required Range. Caused by Personnel Miscommunication of Dead Weight Pressures.Correlation Techniques Reviewed (← links)
- 05000255/LER-1985-016, :on 850830,reactor Trip Initiated by Generator Output Protective Trip.Caused by Personnel Physical Arrangement of Relay Cutouts.Incident Reviewed W/Personnel (← links)
- 05000255/LER-1985-006, :on 850523 & 0606,during Exercising of CRD Mechanisms,Control Rod 31 Failed in Drive in Out Direction.Caused by Failure in Motor Brake in Drive Package. Rod Drive Mechanism Removed (← links)
- 05000255/LER-1984-025, :on 841119,leak Rate Test Indicated Primary Coolant Sys Unidentified Leakage in Excess of Tech Spec Limits.Caused by Relief Valve RV-2082 Bindings in Open Position Due to Bent Stem.Valve Repaired (← links)
- 05000255/LER-1986-003, :on 860106,discovered Undocumented Jumper Wire in EEQ-listed Limitorque motor-operated Valve Operators. Caused by pre-1970 Installation of Wire.Wires Replaced.W/ (← links)
- 05000255/LER-1986-002, :on 860102,discovered That Missile Shield Lift Device Outside Safety Working Load Requirement.No Cause Found.Lifting Device Can Be Used Until New Lifting Device Obtained (← links)
- 05000255/LER-1985-031, :on 851228,during Test of New Undervoltage Relays,Diesel Generator 1-2 Auto Started & Failed to Shed Load.Caused by Improperly Installed Relays & Dirty & Misaligned Contacts.Engineers Counseled (← links)
- 05000255/LER-1986-001, :on 860106,investigation Initiated Re Us Ecology Hanford Reservation Receipt of Radwaste Shipment 85-054-S.Shipment Received & Buried on 851230 W/O Written Ack.Written Ack Received on 860113 (← links)
- 05000255/LER-1985-028, :on 851210,safety Injection Sys Actuation Initiated During Const Activity.Caused by Ac Power Supply Being Disconnected While Replacing Steam Generator Pressure Indicators (← links)
- 05000255/LER-1985-027, :on 851205,engineering Analysis Revealed That Terminal Block PT-0102D Would Pass Unacceptable Leakage Current During LOCA or Main Steam Line Break.Cause Unstated. Terminal Block Replaced (← links)
- 05000255/LER-1985-026, :on 851129,two Safety Injection Tanks Simultaneously Inoperable Due to High Level & Low Level Boron Concentration,Respectively.Caused by Primary Coolant Sys Leakage Through Check Valve (← links)
- 05000255/LER-1985-025, :on 851130,during Hot Shutdown at 0% Power, Electrical Equipment Not Enviromentally Qualified Became Administratively Inoperable.Unusual Event Secured When Cold Shutdown Attained on 851201 (← links)
- 05000255/LER-1985-022, :on 851015 & 16,primary Coolant Sys Leak Calculation Identified Excessive Leakage Resulting in Plant Shutdown.Caused by Faulty Packing on Isolation Valve MOV 3015.Addl Packing Installed (← links)
- 05000255/LER-1984-017, :on 840903,LPSI Flow Control Valve CV-3006 (Fcv:Bp) Not Fully Open.Caused by Misadjusted Packing During Refurbishing of Valve in 1983 & 1984 (← links)
- 05000255/LER-1985-010, :on 850811,reactor Trip Occurred from Loss of Generator Load.Caused by Erratic Response in motor-operated auto-transformer (Mot) During Voltage Adjustment,Resulting in Underexcitation of Generator.Mot Replaced (← links)
- 05000255/LER-1985-011, :on 850812,w/plant in Hot Shutdown,Safety Injection Sys Actuation Initiated During Maint Evolution. Caused by Personnel Error.Responsible Engineer Counseled on Circuit Configuration (← links)
- 05000255/LER-1985-012, :on 850807,determined That Quarterly Tests of Five Containment Isolation Valves Not Performed Per Tech Spec 4.5.2.d.2.Caused by Personnel Error.Administrative Controls for Surveillance Program Corrected (← links)
- 05000255/LER-1985-009, :on 850728 & 0801,safety Injection Tank Low Level Occurred Due to Leakage Through Fill & Drain Valve. Caused by Failure of Safety Injection Sys Valve.Valve Repairs Planned (← links)
- 05000255/LER-1985-008, :on 850723,plant Shutdown Occurred Due to Inoperable Control Room Emergency Air Cleanup Sys.Caused by Removal of Exhaust Fan Ducting Leading to Unisolable Path to External Environ.Drawings Review Planned (← links)
- 05000255/LER-1985-007-01, :on 850621,safety Injection Tank (SIT) & HPSI Automatic Valve Inoperable Concurrently.Caused by Expected Low Level Condition During Boron Concentration Adjustment in SIT & Failed Control Switch in HPSI (← links)
- 05000255/LER-1985-013, :on 850823,26 & 27,noise Spike Resulted in Inadvertent Reactor Protection Sys Actuation.Caused by Unused Circuit Feeding Into Startup Rate Bistable Card. Circuit Removed from Sys (← links)
- 05000255/LER-1985-014, :on 850824,Tech Spec Required Boric Acid Injection Flow Paths Inadvertently Removed from Svc.Caused by Personnel Error.Personnel to Be Counseled on Requirements Re Component Operability (← links)
- 05000255/LER-1984-023, :on 841109,determined That Reactor Protection Low Flow Trip for Four Primary Coolant Pumps Operation Set Incorrectly.Caused by Nonperformance of Calibr Procedure. Calibr Procedure Performed (← links)
- 05000255/LER-1985-004, :on 850411,previous Day Data Used for Channel Adjustment of Power Range Safety Channels Calculations. Caused by Personnel Error.No Adjustment to Channels Necessary.Personnel Counseled (← links)
- 05000255/LER-1985-005, :on 850414,during Power Reduction for Turbine Control Problems,Safeguards Bus 1C Failed to Transfer.Cause Unknown.Investigation Continuing.Proper Hand Switch Operation Will Be Discussed W/Operators (← links)
- 05000255/LER-1981-016-03, /03L-0:on 810421,during Normal Power Operation, Primary & Secondary Data Loggers Failed Due to Faulty Circuit Board & Typer Respectively.Replacement of Plant Sys Equipment Under Evaluation (← links)
- 05000255/LER-1985-003-01, :in Late Nov 1984 & Since 850211,reactor Internals Vibration Monitoring Not Performed for Weekly Test Per Tech Spec 4.13(c).Caused by Hardware Failures in Data Processing Equipment.New Equipment Obtained (← links)
- 05000255/LER-1984-026, :on 841207,valve Leakage Allowed Second Safety Injection Tank to Drain Below Min Level,Exceeding Tech Spec Limit.Caused by Inaccurate Level Indication.Instrument Recalibr (← links)
- 05000255/LER-1984-027, :on 841122 & 1204,charging Pump Could Not Be Started from Control Room or W/Local Start Button.Caused by Closing Coil Failure in Breaker.Breakers Will Be Included in Preventive Maint Program (← links)
- 05000255/LER-1984-019, :on 840908,overspeeding Auxiliary Feedwater Pump P-8B Discovered.Caused by Failed Mechanical Governor Bearing Assembly & Bent Spindle on Pump Turbine Drive. Damaged Parts Replaced (← links)
- 05000255/LER-1984-024, :on 841115,during Hot Shutdown,Leak Rate Test Indicated Primary Coolant Sys Unidentified Leakage in Excess of Tech Specs.Caused by Failed CRD Seal Housing.Seal Housing Replaced (← links)
- 05000255/LER-1984-022, :on 840704,containment Dome Temp Measured at 138 F.Determined Reportable on 841022.Caused by Personnel Error.Containment Temp Limits Established (← links)
- 05000255/LER-1996-002-01, :on 960116,initiated TS Required Shutdown Due to Safeguards Cable Fault.Root Cause of Failure Under Investigation.Const Cable Installation Spec Will Be Revised & Testing of Faulted Cable Will Be Performed (← links)
- 05000255/LER-1984-015, :on 840804,loss of Electrohydraulic Control Fluid Pressure Resulted in Turbine Trip & Automatic Reactor Trip.Caused by Loose Fitting on Discharge Line Due to Personnel Error.Bracket Replaced (← links)
- 05000255/LER-1985-002-01, :on 850219,during Review of Tech Spec Test, Discovered Surveillance Interval for Three of Four Safety Injection Tanks Exceeded.Caused by Personnel Error. Disciplinary Action & Counseling Administered (← links)
- 05000255/LER-1985-001-01, :on 850212,relay Failure Identified in Safety Injection Sys Test Circuit.Cause Undetermined.Malfunctioning Relay Replaced & Precaution Added to SIS Surveillance Procedure to Identify Actuations (← links)
- 05000255/LER-1995-010, :on 950815,ESFA & Manual RT Occurred Following Isolation of PCS Leak.Caused by Less than Adequate Engagement of Tubing Section Into Compression Fitting. Replaced Failed Instrument Line (← links)
- 05000255/LER-1984-016, :on 840810,excessive Primary Coolant Sys (PCS) Leak Identified.Caused by Cracked Socket Weld on PCS Loop Differential Pressure Sensing Line.Support Added to Piping to Inhibit Dynamic Forces (← links)
- 05000255/LER-1995-015, :on 951219,determined Up to Twenty MOVs Could Become Unavailable as Result of App R Fire Scenario.Caused by Original App R Review Not Considering Valve Limit Switch Circuits Could Be Routed in Configuration.Valves Repaired (← links)
- 05000255/LER-1984-013, :on 840727,results of Daily Leak Rate Calculation Indicated Unidentified Primary Coolant Sys Leakage Greater than 1 Gpm.Caused by Charging Pump Seal Leak.Pump Repaired & Procedures Revised (← links)
- 05000255/LER-1984-014, :on 840728,w/reactor Critical in Hot Standby Condition,Primary Coolant Temp Dropped Below 525 F.Caused by Personnel Error.Procedure Revised (← links)
- 05000255/LER-1984-011, :on 840719,while Technicians Calibr Containment Pressure Switches,Two Spurious Containment High Pressure Signals Generated Resulting in ESF Actuations.Caused by Personnel Error (← links)
- 05000255/LER-1984-012, :on 840725,unidentified Primary Coolant Sys (AB) Leakage Greater than 1gpm Discovered.Caused by Leakage Past Loopcheck Valves Into Safety Injection Lines.Check Valves Flushed to Facilitate Improved Seating (← links)
- 05000255/LER-1984-010, :on 840703,section of Cable Tray Encl by Fire Barrier Discovered Hot to Touch.Insp Found Insulation on Cables Sustained Damage Due to Excessive Temp.Caused by long-term Thermal Degradation.Cable Replaced (← links)
- 05000255/LER-1984-009-01, :on 840704,spurious Left Channel Safety Injection Signal Actuation Occurred.Caused by Inadequate Procedure.Procedure Revised & Personnel Counseled (← links)
- 05000255/LER-1984-008-01, :on 840628 & 29,test of Seals of Inner Door of Personnel Air Lock Revealed Leakage Due to Cracks in Inner Seal.Caused by Personnel Calculation Error.Adjustments Completed on Seals (← links)
- 05000255/LER-1984-020, :on 840906,review Determined Surveillance Testing Not Performed on Seven Valves in Hot Leg Injection Sys.Caused by Valves Not Being Included in Testing Program Due to Personnel Error.Valves Tested (← links)
- 05000255/LER-1984-018, :on 840905,surveillance Test for Snubber on Steam Supply Line to Feedwater Pump Not Performed.Caused by Personnel Error.Computerized Tracking Tool Being Developed (← links)
- 05000255/LER-1984-006-01, :on 840612,US Ecology Notified That Ack of Receipt of Radioactive Shipment 84-035-S Not Received. Shipment Trace Initiated on 840612.Receipt & Burial of Shipment Confirmed on 840613 (← links)
- 05000255/LER-1984-005, :on 840512,operations Personnel Used Inadequate Procedure to Replace Fuses in safety-related Circuitry, Resulting in Actuation of Safety Injection Signal & Containment Isolation & Spray Signals (← links)
- 05000255/LER-1984-007-01, :on 840622,work on Pressure Indicator Caused Number of Spurious Actuations of Low Temp Overpressure Protection Sys.Caused by Personnel Error.Proper Communication & Job Coordination Emphasized (← links)
- 05000255/LER-1983-041-01, /01T-0:on 830610,during Routine Sampling of C Safety Injection Tank T-82C,tank Level Fell Below Tech Spec Limit.Caused by Relief Valve RV-3161 Failure to Reset After Lifting.Valve Will Be Repaired (← links)
- 05000255/LER-1991-019, :on 911003,determined That Radioactive Gaseous Effluent Monitor (Rgem) Was Not Functioning Properly.Caused by Failure of O-ring on Rgem Sys.Replaced Worn O-ring & Restablished Sample Flow (← links)
- 05000255/LER-1975-011, LERs 75-011 & 75-012:on 751122,LPSI Pump Seal Leakage Noted During Periodic Test.Caused by Improper O-ring Clearance. Improved Seal Design & Repair Time Reduction Time Will Be Investigated (← links)
- 05000255/LER-1975-013, :on 751122,passive Containment Sys Leakage at Sample Isolation Valve Found Greater than 1 Gpm.Caused by Valve SS-6H-9-RS-AI-NC Leakage.Valve Temporarily Capped (← links)
- 05000255/LER-1975-027, :on 751221,discharge Temp Exceeded Tech Spec Temp Differential Limit When Cooling Tower a Removed from Svc. Caused by Slow Valve Closing Time Which Does Not Prevent Weir Overflow Following Pump Trip (← links)
- 05000255/LER-1976-001, :on 760110,while Filling Reactor Cavity from Sirw Tank W/Safety Injection Pump,Unusual Noise Investigation Revealed Slightly Dented Sirw Tank.Caused by Vacuum in Tank Due to Plugged Vent W/Snow & Ice (← links)
- 05000255/LER-1976-021-03, Containment Purge Supply Valve CV-1808 Failed to Open During Monthly Test Violating Containment Integrity Requirements.Cause Unknown.Valve CV-1808 Internals Reworked in 1978 (← links)
- 05000255/LER-1976-003, :on 760720,CCW Pump P52-C Inboard Bearing Failed During Preventive Maint on Pump P52-A.Probably Caused by Failure to Perform hot-end Alignment Following Repair or by Bearing Slippage on Shaft (← links)
- 05000255/LER-1983-042-01, /01T-0:on 830531,auto & Manual Indication Lights for FIC-0737A Discovered Out,Rendering CV-0737A Inoperable. Caused by Blown Fuses in Control Circuitry.Fuses Replaced (← links)
- 05000255/LER-1984-004, :on 840408,electrical Checkout Activities on Ac Bus Y-20 Resulted in Right Channel Safety Injection Signal Actuation.Caused by Short Circuit in Test Equipment. Reactor Depressurized (← links)
- 05000255/LER-1984-003, :on 840220,during Refueling,Pipe Hanger on Auxiliary Feedwater Piping Discovered Disconnected from Support Strut.Caused by Vibration of Auxiliary Feedwater Piping.Hangers Will Be Reinspected (← links)
- 05000255/LER-1984-002, :on 840401,operators Inadvertently Struck Area Radiation Monitor W/Pole Being Used to Reposition Reactor Cavity Auxiliary Lighting,Resulting in Automatic Actuation of Containment Isolation (← links)
- 05000255/LER-1983-077-03, /03L-0:on 830812,w/control Rods Withdrawn & at Less than 1% Power,Temp Average Fell Below 525 F Limit. Caused by Corrective Actions Taken to Compensate for Turbine Bypass Valve Problems (← links)
- 05000255/LER-1983-075-03, /03L-0:on 831111,hourly Fire Insp Tour of HVAC Room Not Completed Per Tech Specs.Caused by Personnel Not Having Access to Room Due to Faulty Mechanism.Mechansim Repaired (← links)
- 05000255/LER-1983-074-03, /03L-0:on 831109,during Shutdown for Refueling, Valves Failed to Meet as-found Acceptance Criteria.Caused by Adjustments Made to Valve Blowdown Ring.Test Procedure Will Be Revised (← links)
- 05000255/LER-1983-076-03, /03L-0:on 831117,hourly Fire Insp Tour of Control Room HVAC Room Not Completed.Caused by Personnel Error. Security Shift Leader Counseled (← links)
- 05000255/LER-1983-073-01, /01T-0:on 831121,discovered That Tech Spec Surveillance Procedure Tests Only One of Three Water Flow Switch Detectors for Switchgear Room 1-D.Caused by Procedural Inadequacy (← links)
- 05000255/LER-1983-072-01, /01T-0:on 831115,Bechtel Notified Util That High Speed Differential Relays 12CFD12B1A for Emergency Diesel Generators Not Seismically Qualified.Caused by Improper Design Application (← links)
- 05000255/LER-1983-070-03, /03L-0:on 830813,w/shutdown Cooling Sys Isolation Valves MOV-3015 & MOV-3016 Open,Overpressure Protection Not Provided.Caused by Inadequate Procedures.Tech Spec Change Implementation Will Be Revised (← links)
- 05000255/LER-1983-071-03, /03L-0:on 830928,w/reactor Head Removed,Reactor Cavity Boron Concentration Became Less than Refueling Concentration While Various Penetrations Open.Tech Spec 3.6.1(b) Will Apply Only When Fuel in Reactor (← links)
- 05000255/LER-1983-069-01, /01T-0:on 831101,inoperable Fire Barrier Penetrations Discovered in safety-related Areas.Cause Under Investigation.Hourly Fire Insp Tours Initiated & Continue to Be Performed (← links)
- 05000255/LER-1983-067-01, /01T-0:on 831024,Bechtel Analysis Discovered Design Deficiency in Support Configuration for 1-inch Diameter Fill & Drain Piping to T-82D.Caused by Original Plant Design Deficiency.Piping Redesigned (← links)
- 05000255/LER-1983-066-03, /03L-0:on 831005,total Leakage from Penetrations & Isolation Valves Exceeded Tech Spec Limit.Caused by Degradation of Seals & Gaskets on Boundaries.Sealing Surfaces & Personnel Air Lock Seal Replaced (← links)
- 05000255/LER-1983-065-01, /01T-0:on 831006,during Walkdown of Safety Injection Sys Pipe Hangers,Discovered Overload Condition on Baseplate & Anchor Bolts of Hanger H214.Caused by Design Analysis Error.Hanger Support Redesigned (← links)
- 05000255/LER-1983-061-03, /03L-0:on 830910,11 & 16,several Hourly Fire Tours in safety-related Areas Not Completed within Required Period.Caused by Personnel Error.Fire Tours Reestablished (← links)
- 05000255/LER-1983-053-01, /01T-0:on 830806,during Normal Power Operation, Sample from Safety Injection Tank T-82D Showed Boron Concentration Below Tech Spec Limit.Caused by Minor Leak Past Loop Check Valve.Valves Will Be Inspected (← links)
- 05000255/LER-1983-052-01, /01T-0:on 830804,w/safety Injection Tank T-82D Inoperable Due to Routine Evolution,Second Safety Injection Tank T-82B Became Inoperable Due to Low Level.Caused by Leakage Past Fill & Drain Valve (← links)
- 05000255/LER-1983-054-03, /03L-0:on 830721,boric Acid Critical Heat Trace Points 408B & 409 Found Reading Low.Caused by Blown Fuse on Boric Acid Heat Trace Circuit 409B.Lack of Heater Capacity on 409B Caused 408B to Read Low (← links)
- 05000255/LER-1983-037-01, /01T-0:on 830601,rack Mounted Circuit Board Replaced W/One from Stock Resulting in Total Loss of Valve Control During Restoration of Automatic Control of CV-0737A. Caused by Faulty Rack Mounted Circuit Board (← links)
- 05000255/LER-1983-036-03, /03L-0:on 830515,during Normal Power Operation, Safety Injection Tank (SIT) D Level Reached Tech Spec Limit. Caused by Minor Leakage Past Loop Check Valve & SIT Check Valve or Fill & Drain Valve.Leak Monitored (← links)
- 05000255/LER-1982-045-01, /01T-0:on 821203,T-82B Safety Injection Tank B Level Reached Limit of 198 Inches W/Boron Concentration Below Limit.Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve or Fill & Drain Valve.Leak Rate Monitored (← links)
- 05000255/LER-1983-078-03, /03L-0:on 830915,QA Audit Revealed That Tech Spec Surveillance Procedure FO-1 Not Performed within Required Frequency.Caused by Personnel error.FO-1 Will Be Completed Prior to Plant Startup (← links)
- 05000255/LER-1983-064-03, /03L-0:on 830916,during Routine Surveillance Test, as-found Lift Pressure of Pressurized Relief Valve RC-1039 Exceeded Acceptance Criteria Range.Cause Unknown.Valve Lift Setting Adjusted to Proper Value (← links)
- 05000255/LER-1983-063-03, /03L-0:on 830917,during Functional Testing, ITT-Grinnell Hydraulic Snubber 52 Failed to lock-up as Required.Caused by Generic Mfg Deficiency in Snubber Valve Block,Affecting Shuttle Valve Travel (← links)
- 05000255/LER-1983-062-03, /03L-0:on 830828,while Plant Shut Down for Refueling,Routine Refueling Duration Surveillance Revealed Unpredictable Zero Shifts in Pressurizer Pressure Transmitters.Caused by Inaccurate Settings (← links)
- 05000255/LER-1983-060-01, /01T-0:on 830906,pipe Cap Removed from Containment Side of Penetration 21A,creating Open Path to Outside Containment.Caused by Procedural Inadequacy.Procedures Revised (← links)
- 05000255/LER-1983-059-03, /03L-0:on 830816,during Leak Rate Testing, as Found Leakage from Penetration & Isolation Valves Exceeded Tech Specs.Caused by Inadequate Number of Penetration Valves.Isolation Valve Added (← links)
- 05000255/LER-1983-058-03, /03L-0:on 830802,during Normal Power Operation, T-82B,safety Injection Tank B,Level Dropped Below Tech Spec Limit of 186 Inches.Caused by Leakage Past T-82B Fill & Drain Valve During Sampling Evolution of T-82D (← links)
- 05000255/LER-1983-056-03, /03L-0:on 830720,alarm Observed on Panel C-13 Indicating Fire Sys Panel C-47 Off Normal.Breaker Powering C-47 Found Tripped,Causing Alarm.Breaker Reset & C-47 Operation Verified (← links)
- 05000255/LER-1983-045-03, /03L-0:on 830623,safety Injection Tank T-82C Level Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve.Valves Will Be Inspected During Next Refueling Outage (← links)
- 05000255/LER-1983-046-03, /03L-0:on 830626,routine Sample of Sodium Hydroxide Tank T-103 Determined Concentration Below Tech Spec Limit.Cause Unknown.Possibility of Chemical Reaction within Tank Being Investigated (← links)
- 05000255/LER-1983-044-01, /01T-0:on 830625,during Planned Power Reduction, Sample from Safety Injection Tank T-82D Showed Boron Concentration Below Tech Specs.Caused by Minor Leak Past Loop Check Valve.Valves Will Be Inspected (← links)
- 05000255/LER-1983-043-03, /03L-0:on 830609,boron Concentration of Safety Injection Tank D Sample Did Not Reach Tech Spec Limit of 1,720 Ppm.Caused by Boron Dilution Due to Minor Leakage. Primary Coolant Leak Rate Being Monitored (← links)
- 05000255/LER-1983-057-01, /01T-0:on 830810,misinterpretation of ASME Code Requirements Resulted in Approx 12 Valves,Sized 1,500 Psi, Being Procured to Svc Rather than Design Temp & Pressure Ratings (← links)
- 05000255/LER-1983-051-01, /01T-0:on 830801,w/T-82D Safety Injection Tank D inoperable,T-82A Became Inoperable Due to Low Level.Caused by Leakage Past Fill & Drain Valve on Tank a While Draining T-82D.Valves to Be Inspected & Repaired (← links)
- 05000255/LER-1983-050-03, /03L-0:on 830707 & 08,safety Injection Tank T-82D Sample Showed Boron Concentration Below Tech Spec Limit. Caused by Leakage Past Loop & Safety Injection Tank Check Valves or Fill & Drain Valve (← links)
- 05000255/LER-1983-025-03, /03L-0:on 830410,sample from T-82c Showed Boron Concentration Below Tech Spec Limit of 1720 Ppm.Caused by Minor Leakage Past Loop Check Valve & SIT Check Valve. Primary Coolant Leak Rate Being Closely Monitored (← links)
- 05000255/LER-1983-027-01, /01T-0:on 830428,w/safety Injection Tank D T-820 Inoperable,Tank T-82B Became Inoperable Due to Low Level. Caused by Leakage Past Fill & Drain Valve on Tank B.Fill & Drain Valves to Be Inspected & Repaired (← links)
- 05000255/LER-1983-026-01, /01T-0:on 830428,sample from T-82D (Safety Tank D) Showed Boron Concentration Below Tech Spec Limit.Caused by Boron Dilution Due to Minor Leakage Past Loop Check Valve. Primary Coolant Leak Rate Monitored (← links)
- 05000255/LER-1983-023-01, /01T-0:on 830415,during Routine Sampling of Safety Injection Tank D,Tank Level Fell Below Tech Spec Limit of 186 Inches.Caused by Delayed Fill Operations When Low Flow Alarm Received for Cooling Water (← links)
- 05000255/LER-1983-020-01, /01T-0:on 830321,discovered That Current Core Safety Analysis Does Not Account for Response Times of PCS Resistance Temp Device (Rtd).Caused by Oversight of Analyst to Include RTD Response Time in Analysis (← links)
- 05000255/LER-1983-016-03, /03L-0:on 830224,sample from D Safety Injection Tank T-82D Showed Boron Concentration Below Tech Spec Limit. Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve or Fill & Drain Valve.Concentration Restored (← links)
- 05000255/LER-1983-017-03, /03L-0:on 830305,B Safety Injection Tank T-82B Level Reached Tech Spec Limit.Caused by Minor Leakage Past Loop Check Valve & Safety Injection Tank Valves.Primary Coolant Leak Rate Monitored (← links)
- 05000255/LER-1983-019-01, /01T-0:on 830319,during Inoperability of D Safety Injection Tank T-82D Due to Routine Evolution,Second Tank T-82B Became Inoperable Because of Low Level.Caused by Leakage Past Drain Valves.Valves Will Be Inspected (← links)
- 05000255/LER-1983-018-03, /03L-0:on 830307,safety Injection Tank D,T-82D Level Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve & Check Valve.Valves Will Be Inspected During Next Outage (← links)
- 05000255/LER-1983-015-03, /03L-0:on 830221,during post-maint Test on Diesel Generator 1-1,generator Frequency Increased to Approx 65 Hz. Caused by Speed Setting Potentiometer & Mechanical Governor Being Out of Adjustment.Corrective Adjustments Made (← links)
- 05000255/LER-1983-040-01, /01T-0:on 830607,safety Injection Tank D Sample Showed Boron Concentration Below Tech Spec Limit of 1,720 Ppm.Caused by Minor Leakage Past Loop Check Valve.Valves Will Be Checked During Next Outage (← links)
- 05000255/LER-1983-038-01, /01T-0:on 830603,W/T-82C (Safety Injection Tank C) Inoperable Due to Routine Evolution & Tank T-82D Became Inoperable Due to Low Level.Caused by Leakage Past Fill & Drain Valve.Valves to Be Inspected (← links)
- 05000255/LER-1983-039-17, /01T-0:on 830603,hydrogen Recombiners Simultaneously Loaded to Respective MCC for Surveillance Testing,Contrary to Standing Order.Caused by Inadequate Surveilliance Procedure (← links)
- 05000255/LER-1983-008-01, /01T-0:on 830209,thermal Overload for One Engineered Safeguards Room Cooler Fan Tripped Based on Evaluation & Testing Activities.Cause Not Stated.Tripped Overload Reset (← links)
- 05000255/LER-1983-011-03, /03L-0:between 830131 & 0213,during Normal Operations,Safety Injection Tank B Level Reached Tech Specs Limit of 198 Inches on Four Occasions.Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve (← links)
- 05000255/LER-1983-010-03, /03L-0:on 830127,during QA Audit of Completed Tech Spec Surveillances,Quarterly Check of Diesel Fire Pump Batteries for May 1982 Found to Have Exceeded Due Date by 2 Days.Caused by Personnel Error (← links)
- 05000255/LER-1983-035-03, /03L-0:on 830505,safety Injection Tank (SIT) C Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve & SIT Check Valve or Fill & Drain Valve.Leak Rate Being Monitored (← links)
- 05000255/LER-1982-049-03, /03L-0:on 821220,during Routine Shift Surveillance,Fire Sys Alarm Panel C-47 Found Inoperable Due to Loss of Power.Caused by Damaged Wires in Remote Flow Switch Resulting in Short Circuit.Wires & Contacts Repaired (← links)
- 05000255/LER-1982-032-03, /03L-0:on 820921,during Routine Surveillance, Snubber 39 (GC-8 Shutdown Cooling LPSI Pump Suction) Found W/Insufficient Oil & Declared Inoperable.Caused by Scores in Cylinder Walls Due to Vibrations.Snubber Replaced (← links)
- 05000255/LER-1983-033-03, /03L-0:on 830428,D Safety Injection Tank T-82D Sampling Indicated Boron Concentration Below Tech Spec Limit.Caused by Minor Leakage Past Loop Check Valve & SIT Check Valve or Fill & Drain Valve (← links)
- 05000255/LER-1983-032-03, /03L-0:on 830429,declaration of Operability Signature Found Incomplete for Maint Order on Fire Barrier Penetration.Caused by Personnel Oversight Re New Maint Order Closeout Procedures (← links)
- 05000255/LER-1983-034-01, /01T-0:on 830516,D Safety Injection Tank T-82D Level Fell Below Tech Spec Limit During Routine Sampling. Caused by Delay in Fill Operations Due to Failure of Relief Valve RV-3161 to Reseat within 1 H (← links)
- 05000255/LER-1983-029-03, /03L-0:on 830422,safety Injection Tank B Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve.Primary Coolant Leak Rate Being Monitored. Tank Restored to Normal Range (← links)
- 05000255/LER-1983-031-01, /01T-0:on 830509,w/safety Injection Tank (SIT) D (T-82D) Inoperable Due to Routine Evolution,Second SIT (T-82B) Became Inoperable Due to Low Level.Caused by Leakage Past Fill & Drain Valve on SIT B (← links)
- 05000255/LER-1983-030-01, /01T-0:on 830509,sample from Safety Injection Tank T-82D Showed Boron Concentration Below Tech Spec Limit. Caused by Minor Leakage Past Loop Check Valve & Safety Injection Tank Check or Fill & Drain Valve (← links)
- 05000255/LER-1983-028-03, /03L-0:on 830415,level of Safety Injection Tank D Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve.Leak Rate Being Closely Monitored.Valves Will Be Inspected (← links)
- 05000255/LER-1983-012-03, /03L-0:on 830130,sample from T-82D (Safety Injection Tank D) Showed Boron Concentration Below Tech Spec Limit of 1,720 Ppm.Caused by Boron Dilution Due to Minor Leak Past Check Valve.Primary Coolant Leak Rate Monitored (← links)
- 05000255/LER-1983-009-03, /03L-0:on 830127,PCS Sample Revealed Dose Equivalent I-131 Exceeded Tech Specs.Caused by Normal Fuel Leakage.Procedures to Be Revised to Increase Letdown Purification Flow Following Trip (← links)
- 05000255/LER-1983-007-01, /01T-0:on 830204,during Review of SEP Topics Following LOCA W/Concurrent Loss of Either Diesel Generator, Determined Only One Fan in Each Engineering Safeguards Room Cooler Would Operate.Caused by Design Deficiency (← links)
- 05000255/LER-1983-006-01, /01T-0:on 830204,during Ae Review of SIRWT Support Structure,Discrepancies Between Support Structure & as-built Documents Noted.Caused by Failure to Document Const Changes in as-built Documentation.Mods Underway (← links)
- 05000255/LER-1983-002-03, /03L-0:on 821209,log Record Indicated T-102 Gas Pressure at 8.2 Psig,W/Another Occurrence of Low Pressure on 830119.Caused by Leak in Nitrogen Sys Supplying T-102.Search for Leak Initiated (← links)
- 05000255/LER-1983-001-01, /01T-0:on 830112,while Raising Boron Concentration in T-82B (B Safety Injection Tank),Tank Became Inoperable Due to Low Tank Level.Caused by High Tank Level & Leakage from Loop Check Valve (← links)
- 05000255/LER-1982-041-03, /03L-0:on 821030,during Startup,Primary Cooling Sys Sample Indicated dose-equivalent I-131 at 1.38 Mci Exceeding 1.0 Mci Limit.Caused by Iodine Spiking After Change in Thermal Power.Purification Flow Increased (← links)
- 05000255/LER-1982-040-03, /03L-0:from 821028-1118,safety Injection Tank B Level Reached Tech Spec Limits 13 Times.Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve or Fill & Drain Valve.Loss of Level Indication Compounded Problem (← links)
- 05000255/LER-1983-021-03, /03L-0:on 830326,sample from Safety Injection Tank D Showed Boron Concentration Below 1,720 Ppm Tech Spec Limit.Caused by Minor Leakage Past Loop Check Valve & Safety Injection Tank Check Valve or Fill & Drain Valve (← links)
- 05000255/LER-1982-030-03, /03L-0:on 820927,boric Acid Heat Trace Circuit 432 Failed.Redundant Channel Remained Operable.Caused by Blown Fuse in Controller.Circuitry Tested & Fuse Replaced (← links)
- 05000255/LER-1982-029-03, /03L-0:on 820916,T-82B (Safety Injection Tank B) Level Reached Tech Spec Limit of 198 Inches Three Times in 24-h Period.Caused by Minor Leakage Past Loop Check Valve & Fill & Drain Valve.Fill & Drain Cycled to Stop Leakage (← links)
- 05000255/LER-1982-028-03, /03L-0:on 820915,boric Acid Heat Trace Circuit 401 (Gravity Feed Line to Charging Pumps) Failed.Redundant Channel Remained Operable.Caused by Failed Heater Element. Heater Element Replaced (← links)
- 05000255/LER-1982-043-03, /03L-0:on 821102,T-82D (D Safety Injection Tank) Level Dropped Below Tech Spec Limit of 186 Inches.Level Indicating Sys & Associated Alarms Failed to Respond to Level Change.Caused by Leakage Past Fill & Drain Valve (← links)
- 05000255/LER-1982-042-01, /01T-0:on 821112,monthly Sample of T-82D (D Safety Injection Tank) Showed Boron Concentration Below Tech Spec Limit.Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve.Primary Coolant Leak Monitored (← links)
- 05000255/LER-1982-039-01, /01T-0:on 821105 & 07,sample from Safety Injection Tank B (T-82B) Showed Boron Concentration Below Tech Spec Limit.Caused by Minor Leakage Past Loop Check Valve & SIT Check Valve or Fill & Drain Valve.Valves Will Be Inspecte (← links)
- 05000255/LER-1982-033-03, T-82B (B Safety Injection Tank) Level Reached Tech Spec Limit of 198 Inches.Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve or Fill & Drain Valve.Valves Will Be Inspected at Next Outage (← links)
- 05000255/LER-1982-035-03, /03L-0:on 821005,wrong Data Inserted Into in-core Alarm Setpoints.Caused by Transmittal of Old Data to I&C Supervisor Instead of Reactor Engineer.Error Immediately Recognized & Correct Data Entered (← links)
- 05000255/LER-1982-034-03, /03L-0:on 821002,malfunction of Fire Sprinkler Alarm Resulted in Alarm on Panels C-47 & C-13.Panel C-13 W/O Reflash Capability & C-47 Not in Operator Line of Vision. Detector Repaired.Design Change Under Consideration (← links)
- 05000255/LER-1982-026-03, /03L-0:on 820901,determined That Four Fire Doors Mfg by Protective Matls Co Not Documented to Confirm Testing & Approval by Nationally Recognized Lab.Caused by Vendor Failure to Obtain Certification Following Mods (← links)
- 05000255/LER-1994-007, :on 940308,EDG Fuel Oil Transfer Sys Including Storage Tank T-10 & Associated Piping Found Not Tornado Protected.Caused by Design Errors.Barriers Around T-10 Provided (← links)
- 05000255/LER-1982-024-01, /01X-1:on 820819,review of SEP Topics Discovered Potential Problem W/Svc Water Sys.Following Loca,W/ Concurrent Loss of Offsite Power & Diesel Generator,Running Svc Water Pumps May Trip as Result of Going to Runout (← links)
- 05000255/LER-1983-004-03, /03L-0:on 830106,PCS Leak Rate Calculation Indicated Unidentified Leakage Exceeding Tech Spec.Caused by Improperly Seated CV-2056.Valve Cycled & Proper Seat Obtained (← links)
- 05000255/LER-1983-005-03, /03L-0:on 830110,discrepancies Noted in 1981 Results for Snubber 63.Caused by Fluid Not Being Added Since 1981 Due to Deficiency in Surveillance Procedure.Snubber Replaced.Procedure Revised (← links)
- 05000255/LER-1983-003-03, /03L-0:on 830106,during Normal Operation,B Safety Injection Tank T-82B Reached Tech Spec Limit of 198 Inches. Caused by Minor Leakage Past Loop Check Valve & Tank Check Valve Refill & Drain Valve.Valves Will Be Inspected (← links)
- 05000255/LER-1982-021-03, /03L-0:on 820729,during Surveillance of Hydraulic Snubbers,Snubber 31 Contained Insufficient Oil.Caused by Deteriorated O-rings.Failed Snubber Replaced (← links)
- 05000255/LER-1982-022-03, /03L-0:on 820730,during Insp of Ess sys,3/4-inch, 200 Psi,Threaded Bronze Valve Found Installed at MV-3420. Cause Undetermined.Bronze Valve Replaced.Current Documentation Methods Would Preclude Recurrence (← links)
- 05000255/LER-1982-023-01, /01T-0:on 820815,escape Air Lock Inner Door Seals Failed W/Outer Door Open.Seal Failure Aggravated by Strongback & Gasket Installation Methods.Vendor Recommendations on Gasket Installation Will Be Followed (← links)
- 05000255/LER-1981-011-03, /03L-0:on 810304,diesel Generator 1-1 Overspeed & Low Air Pressure Alarms Actuated & Would Not Reset After 16 Cylinder Leak Test.Caused by Broken micro-switch Due to High Impact Resulting from Improper Use of Trip Lever (← links)
- 05000255/LER-1982-027-03, /03L-0:on 820901,procedural Inadequacies Discovered Which Could Cause Reduction in Degree of Redundancy in Containment Cooling Sys.Procedures Revised to Require Fans to Be Declared Inoperable If Stopped (← links)
- 05000255/LER-1982-025-01, /01T-0:on 820827,during Review of Sequencer Logic, DBA Sequencer Determined Not to Operate If Safety Injection Sys Received More than 55-s After Loss of Power.Caused by Design Oversight.Procedures Revised (← links)
- 05000255/LER-1981-001-01, /01T-0:on 810106,output Breakers of Batteries Were Inadvertently Opened for 1-h.Caused by Misalignment Due to Personnel Failure to Follow procedure.Safety-related Surveillance & Maint Procedures Reviewed Prior to Use (← links)
- 05000255/LER-1982-020-03, /03L-0:on 820623,3/4-inch,200 Psi,Threaded Bronze Valve Found Installed at MV-3415.Specs Require 600 Psi,Stainless Steel Socket Welded Valve.Bronze Valve Replaced W/Correct Valve (← links)
- 05000255/LER-1982-015-03, Snubber 17 (Main Steam Line Upstream of Atmospheric Dump Valve CV-0780) Contained Insufficient Oil.Caused by Deteriorated O-rings.Snubber Replaced & Will Be Rebuilt on 5-yr Cycle (← links)
- 05000255/LER-1982-018-03, /03L-0:on 820528,during Normal Plant Operation,One Channel of Boric Acid Heat Tracing Failed,However,Redundant Channel Remained Operable.Caused by Failed Circuit Card. Circuit Card Replaced (← links)
- 05000255/LER-1981-037, Forwards Updated LER 81-037/03X-1 (← links)
- 05000255/LER-1982-012, Forwards Updated LER 82-012/01X-1 (← links)
- 05000255/LER-1982-014-01, /01T-0:on 820505,excessive Leakage Through Seals of Escape Lock Inner Door Reported in Containment Bldg. Caused by Door Gaskets Not Protruding Equally Over Periphery of Door.Gaskets Replaced & Door Adjusted (← links)
- 05000255/LER-1982-014, Forwards LER 82-014/01T-0 (← links)
- 05000255/LER-1982-013-03, /03L-0:on 820408,during Testing of Sirw Tank, Outlet Valve CV-3057 Failed to Close.Caused by Small Piece of Teflon Tape Lodged in Solenoid Valve.Valve Cleaned & Proper Taping Techniques Reviewed by Maint Personnel (← links)
- 05000255/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000255/LER-1982-011-01, /01T-0:on 820412,during Review of Const Records, Matl & Testing Certifications Could Not Be Located for Four Pieces of 8-inch Containment Purge Lines.Caused by Inadequate Matl Controls.Nonconforming Matl to Be Replaced (← links)
- 05000255/LER-1982-011, Forwards LER 82-011/01T-0 (← links)
- 05000255/LER-1982-004-03, /03L-0:on 811204,safety Injection Actuation Occurred,Resulting in Overpressure Protection Sys Operation. Caused by Loss of Safety Injection Block Signal During Shifting of Electrical Power Supply (← links)
- 05000255/LER-1982-004, Forwards LER 82-004/03L-0 (← links)
- 05000255/LER-1990-008, :on 900425,during Local Leak Rate Test, Penetration Leak Rate Exceeded Cumulative Leak Rate & Nitrogen Supply Check Valve Found Leaking.Caused by Machining Marks on Valve.Valve Reworked (← links)
- 05000255/LER-1990-007, :on 900418,reanalysis of Main Steam Line Break Identified That Containment Pressure Could Exceed FSAR Values.Caused by Inadequate Design & Personnel Error.Mod Installed to Close Feedwater Valves (← links)
- 05000255/LER-1982-010-03, /03L-0:on 820202,during Surveillance of Hydraulic Snubbers,Snubber 37 (LPSI Pump Discharge Piping) Contained Insufficient Oil & Declared Inoperable.Caused by Deteriorated O-rings.New O-rings Installed (← links)
- 05000255/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000255/LER-1982-009-03, /03L-0:on 820202,during Surveillance of 1-1 Diesel Generator,Load Swings of 650 Kw Observed.Caused by Defective Governor Control & Governor Actuator Units.Both Governors Replaced (← links)
- 05000255/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000255/LER-1982-008-03, /03L-0:on 820205,during Routine Surveillance to Verify Reactor Protection Sys Trip Setpoints,Thermal Margin/ Low Pressure Trip Was 1,747 Psia.Caused by Temp Change or Movement of Panel.Instrument Recalibr (← links)
- 05000255/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000255/LER-1982-007-03, /03L-0:on 820129,SIRW Tank Supply to Charging Pump P55 Was Inoperable.Caused by Blown Fuse Resulting in False Low Level Indication Rendering Shifting of Borated Water Supply to Charging Pumps.Fuse Replaced (← links)
- 05000255/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000255/LER-1982-006-03, /03L-0:on 820126 & 28,condensate Inventory Fell to 94,000 & 94,500 Gallons,Respectively.Caused by Condenser Tube Leak.Condensate Pumps Stopped to Permit Repairs (← links)
- 05000255/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000255/LER-1982-005-03, /03L-0:on 820122,steam Generator Conductivity,Ph & Sodium Went Out of Spec During Power Reduction to Force Chemicals from Hideout in Steam Generators.Caused by Inleakage from Makeup Demineralizer Sys.Repairs in Progress (← links)
- 05000255/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000255/LER-1982-003-03, /03L-0:on 820118,three Hose Stations Were Isolated in Violation of Tech Specs.Caused by Need to Repair Frozen Manual Valve in Fire Supression Sys Piping.Blank Flange Installed on Valve as Temporary Repair (← links)
- 05000255/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000255/LER-1982-002-03, /03L-0:on 820106,during Monthly Testing,Auxiliary Feedwater Flow Control Valves Did Not Function Properly, Rendering Automatic Initiation Inoperable.Caused by Flow Controllers Out of Adjustment.Controllers Adjusted (← links)
- 05000255/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000255/LER-1982-001-03, /03L-0:on 820105,breaker 152-105 Manually Tripped Open,Causing Bus 1C to Become Inoperable.Caused by Dirty Closing Spring Linkage on Breaker.Linkage Cleaned & Lubricated (← links)
- 05000255/LER-1982-001, Forwards LER 82-001/03L-0 (← links)
- 05000255/LER-1981-050-03, Reviews of Documentation Associated W/Repair Work to Pressurizer power-operated Relief Valves Were Found to Be Incomplete.Caused by Personnel Error.Procedures to Be Reviewed (← links)
- 05000255/LER-1981-050, Forwards Updated LER 81-050/03X-1 (← links)
- 05000255/LER-1981-053-01, /01T-0:on 811231,personnel Lock Doors Were Opened Simultaneously.Caused by Broken Pin in Interlock Mechanism. Pin Replaced & Failure Under Investigation (← links)
- 05000255/LER-1981-053, Forwards LER 81-053/01T-0 (← links)
- 05000255/LER-1981-052-01, /01T-0:on 811214,shift Supervisor Vented Increased Containment Pressure Through 3-inch Manual Valve W/Operator Standing By.Caused by Supervisor Error in Judgment.Employee Removed from Duties to Review Knowledge of Tech Specs (← links)
- 05000255/LER-1981-052, Forwards LER 81-052/01T-0 (← links)
- 05000255/LER-1981-049-03, /03L-0:on 811211,pressure Control Sys (PCS) Charging Letdown Mismatch of 32 Gpm Found.Caused by PCS Leakage Due to Improperly Installed Gasket in Control Rod Drive Mechanism Seal Housing (← links)
- 05000255/LER-1981-049, Forwards LER 81-049/03L-0 (← links)
- 05000255/LER-1981-051-03, /03L-0:on 811125,six Hydraulic Snubbers Located in Main Steam & ESF Sys Determined Inoperable.Caused by Loss of Hydraulic Fluid Through Leaking O-ring Seals.Snubbers Rebuilt & Replaced (← links)
- 05000255/LER-1981-051, Forwards LER 81-051/03L-0 (← links)
- 05000255/LER-1981-015-03, /03L-0:on 810414,routine Chemistry Sampling of Safety Injection Tanks Revealed Boron Concentration of SIT T-82B to Be 1671 Ppm.Cause of Low Boron Concentration Due to Dilution Resulting from PCS Leakage (← links)
- 05000255/LER-1981-015, Forwards LER 81-015/03L-0 (← links)
- 05000255/LER-1981-014-03, /03L-0:on 810402,during Normal Operation,Water Level in Safety Injection Tank T-82B Exceeded High Level Limit.Caused by Inleakage from Primary Coolant Sys & Drift in Narrow Range Amplifier.Alarm Setpoint Adjusted (← links)
- 05000255/LER-1981-014, Forwards LER 81-014/03L-0 (← links)
- 05000255/LER-1981-048-03, /03L-0:on 811025,open Fire Barrier Found in West Engineered Safeguards Pump Room W/O Fire Watch Required by Tech Specs.Caused by Personnel Oversight.Personnel Instructed in Responsibility for Fire Watches (← links)
- 05000255/LER-1981-048, Forwards LER 81-048/03L-0 (← links)
- 05000255/LER-1981-046-03, /03L-0:on 811016,fire Protection Alarm Panel C-47C Discovered Inoperable.Caused by Dead Circuit Due to Blown Fuse.Fuse & Relay Replaced (← links)
- 05000255/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000255/LER-1981-047, Forwards LER 81-047/01T-0 (← links)
- 05000255/LER-1981-047-01, /01T-0:on 811029,during re-evaluation of Seismic Anchorage of Diesel Generator Fuel Oil Day Tanks,Determined Tanks Incapable of Withstanding Sse.Cause Apparently Due to Differences in Seismic Analysis Methods (← links)
- 05000255/LER-1981-045-03, /03L-0:on 811010,power Supply Cable to Fire Protection Sys Annunciator Panel Failed W/Resultant Loss of Alarm Capability.Caused by Damage to Cable by Lines Used in Installation of Equipment.Cable Repaired (← links)
- 05000255/LER-1981-045, Forwards LER 81-045/03L-0 (← links)
- 05000255/LER-1981-044-03, /03L-0:on 811003,when Draining Containment Sump, Flow Path Established Through Test Connection,Bypassing Auto Isolation Valve & Reducing Redundancy Degree.Caused by Supervisor Judgment Error Re Evolution.Event Reviewed (← links)
- 05000255/LER-1981-044, Forwards LER 81-044/03L-0 (← links)
- 05000255/LER-1981-043-03, /03L-0:on 811006,during Surveillance of Radiation Moniter Found Removable Instrument Assembly 2136 Inoperable. Caused Not Positively Identified.Replaced & Subsequently Checked Detector.No Further Problems (← links)
- 05000255/LER-1981-043, Forwards LER 81-043/03L-0 (← links)
- 05000255/LER-1981-040-01, /01T-0:on 811005,during Testing to Determine Setpoint of Pressurizer Relief Valve RV-1039,pressure Exceeded Tech Spec Range.Cause Unknown.Valve Setpoint Reset.Remaining Safety Valves to Be Tested (← links)
- 05000255/LER-1981-040, Forwards LER 81-040/01T-0 (← links)
- 05000255/LER-1981-039-01, /01T-0:on 811006,during Electrical insp,150 splices,20 Terminal Blocks & 5 Jumper Wires Found W/ Questionable Environ Qualification.Caused by Const Stds Below Current Criteria (← links)
- 05000255/LER-1981-039, Forwards LER 81-039/01T-0 (← links)
- 05000255/LER-1981-038-03, /03L-0:on 810915,local Leak Rate Test on Penetrations 68a &68b Showed Excessive Pressure Decay for Seismic Air Supplies.Caused by Leakage Through Tubing Joints &/Or Isolation Check Valve.New Valves to Be Purchased (← links)
- 05000255/LER-1981-038, Forwards LER 81-038/03L-0 (← links)
- 05000255/LER-1981-035-03, /03L-0:on 810827,annunciator 48 on Panel K-11 Did Not Reflash to Ack Annunciator of Second Alarm on Panel C-47.Caused by Panel K-11 Lack of Reflash Capability.Alarm Response Procedure Revised (← links)
- 05000255/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000255/LER-1981-030-03, /03L-0:on 810718,control Valve CV-3025 Failed Closed & Isolated Shutdown Cooling.Caused by Failed Valve Positioner Filling W/Water Due to Water in Instrument Air Line.Prevention of Reoccurrence Being Investigated (← links)
- 05000255/LER-1981-030, Forwards LER 81-030/03L-0 (← links)
- 05000255/LER-1982-046-03, /03L-0:between 821125 & 1206,level of Safety Injection Tank B Reached Tech Spec Limit on Seven Occasions. Boron Concentration Fell Below Tech Spec Limit Twice.Level Increase Caused by Minor Leakage Past Loop Check Valve (← links)
- 05000255/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000255/LER-1982-048-03, /03L-0:on 821201,w/thermal Margin/Low Pressurizer Pressure (Tm/Lp) Channel D Inoperable,Trip Signal Inserted in Tm/Lp Channel a Removed Before Declaring Channel a Operable.Caused by Misinterpretation of Requirements (← links)
- 05000255/LER-1982-048, Forwards LER 82-048/03L-0.Detailed Event Analysis Encl (← links)
- 05000255/LER-1982-047-03, /03L-0:on 821126,routine Sample of Safety Injection Tank T-82D Showed Boron Concentration Below 1,720 Ppm.Caused by Minor Leakage Past Loop Check Valve & Safety Injection Tank Check Valve.Leak Rate Monitored (← links)
- 05000255/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000255/LER-1982-037-03, /03L-0:on 821017,primary Coolant Sys Sample Revealed Dose Equivalent I-131 Exceeded Tech Spec Limits. Caused by Secured Purification Demineralizers Following Plant Trip on 821016.Flow Restored (← links)
- 05000255/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000255/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000255/LER-1982-036-01, /01T-0:on 821023,during Normal Power Operation, T-82B Safety Injection Tank Level Reached Tech Spec Limit & Tank Sample Boron Concentration Fell Below Tech Spec Limits. Caused by Minor Leakage Past Loop Check Valve (← links)
- 05000255/LER-1982-036, Forwards LER 82-036/01T-0 (← links)
- 05000255/LER-1982-031-03, /03L-0:on 820909,1-1 Diesel Generator Water Jacket Heater Found Inoperable.Caused by Corrosion of Heater Element.Heater Replaced W/Similar Type Element.Mod Developed to Replace Heater Element (← links)
- 05000255/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000255/LER-1983-048-01, /01T-0:on 830719,safety Injection Tank D Boron Concentration Found Below Tech Spec Limit & Could Not Be Restored within 1 H.Caused by Minor Leakage Past Loop & Safety Injection Tank Check Valves (← links)
- 05000255/LER-1983-049-01, /01T-0:on 830719,during FSAR Review,Current from Short Circuit in 125-volt Dc Sys Discovered to Result in Excessive Temp of Associated Conductors.Caused by Faulty Installation.Corrections Being Considered (← links)
- 05000255/LER-1983-047-01, /01T-0:on 830712,w/safety Injection Tank T-82D inoperable,T-82B Became Inoperable Due Low Level.Caused by Leakage Past Fill & Drain Valve on Safety Injection Tank B.Repairs Will Be Made During Next Outage (← links)
- 05000255/LER-1982-044-01, /01T-0:on 821130,determined That Feed Breakers & Cables to MCC-1 & MCC-2 Might Overload Following Loca.Caused by Original Load Study Based on Incorrect Data.New Requirements to Shed Loads Instituted (← links)
- 05000255/LER-1982-044, Forwards LER 82-044/01T-0 (← links)
- 05000255/LER-1989-025, :on 891121,PORVs Simultaneously Opened, Following Manual Opening of motor-operated Block Valve & Causing Reactor Trip & Safety Injection Actuation Signal. Caused by Rapid Repressurization of PORV (← links)
- 05000255/LER-1981-041-01, /01T-0:on 811012,four Defects Found in Clad of One Fuel Rod.Cause Unknown.All Similar Fuel Bundles Removed from Core During Refueling Outage.Fuel Vendor to Conduct Addl Insp (← links)
- 05000255/LER-1981-042-01, /01T-0:on 811012,during Testing,Lift Pressures for 12 of 24 Steam Generator Relief Valves Were Below Min Allowable.Caused by Use of Steam Pressure Alone,W/O Addl Mechanical Lift Force as in Previous Tests.Valves Reset (← links)
- 05000255/LER-1981-041, Forwards LER 81-041/01T-0 (← links)
- 05000255/LER-1981-042, Forwards LER 81-042/01T-0 (← links)
- 05000255/LER-1981-036-01, /01T-0:on 810920,during Penetration Surveillance Test,Total as-found Leakage from All Penetrations & Isolation Valves Exceeded Limits.Cause Undetermined But Failure of Penetration 52 Isolation Valves Suspected (← links)
- 05000255/LER-1981-036, Forwards LER 81-036/01T-0 (← links)
- 05000255/LER-1981-033-03, /03L-0:on 810818,during Power Ascension,Four Incore Alarms Received.Caused by Unusual Flux Shapes Due to Power Ascension & by Alarms Being Set at Limits More Conservative than Tech Specs (← links)
- 05000255/LER-1981-033, Forwards LER 81-033/03L-0 (← links)
- 05000255/LER-1981-032-01, /01T-0:on 810821,during Resin Sluicing,Abnormally High Pressure Exceeded Setpoint of Relief Valve Rv 1111, Which Opened Momentarily & Released Waste Gas to Stack. Caused by Inadequate Procedure (← links)
- 05000255/LER-1981-032, Forwards LER 81-032/01T-0 (← links)
- 05000255/LER-1981-031-03, /03L-0:on 810725,LPSI Pump Suction Valves from Sirw Tank & PCS Were Misaligned.Caused by Cl 3.2 Incorrect Identification of Valve Positions.Administrative Controls for Cl Revisions Will Be Changed to Require Proofreading (← links)
- 05000255/LER-1981-031, Forwards LER 81-031/03L-0 (← links)
- 05000255/LER-1981-027-03, During Sampling of Iodine Removal Sys Tank T-102,hydrazene Concentration Found Exceeding Tech Spec.Caused by Improper Dilution Due to Vague Procedural Requirements.Procedure Revised (← links)
- 05000255/LER-1981-027, Forwards Updated LER 81-027/03X-1 (← links)
- 05000255/LER-1981-028-03, Jacket Water Leak Developed Which Required Stopping Engine.Caused by Failure of Pipe Nipple Due to Either Vibration or Use of Pressure Switch Isolation Valve as Handhold/Foothold (← links)
- 05000255/LER-1981-028, Forwards Corrected LER 81-028/03L-0.Replaces 810803 Submittal (← links)
- 05000255/LER-1981-026-03, /03L-0:on 810626,during Diesel Generator 1-1 Test Startup,Engine Failed to Reach Rated Speed.Caused by Motor Failure in Potentiometer in Engine Speed Control Circuit. Motor Replaced (← links)
- 05000255/LER-1981-026, Forwards LER 81-026/03L-0 (← links)
- 05000255/LER-1981-025-01, /01T-0:on 810626,shutdown Sequencers 34-5 & 34-6 Failed During Testing.Caused by Sticking Clutch & Dirty Contacts.Clutch Cleaned & Lubricated.Contacts Cleaned (← links)
- 05000255/LER-1981-025, Forwards LER 81-025/01T-0 (← links)
- 05000255/LER-1981-019-01, /01T-0:on 810528,during Fuel Vendor Review,Three Radial Peaking Factor Limits Were 1% Nonconservative During Current Cycle.Caused by Vendor Errors in Fuel Cycle Calculations.Surveillance Limits Have Been Revised (← links)
- 05000255/LER-1981-019, Forwards LER 81-019/01T-0 (← links)
- 05000255/LER-1981-022-03, /03L-0:on 810531,pump Suction Snubber 43 Found Leaking Oil.Caused by Apparent O-ring Failure.Snubber Disassembled (← links)
- 05000255/LER-1981-022, Forwards LER 81-022/03L-0 (← links)
- 05000255/LER-1981-023-03, /03L-0:on 810602,during Testing,Diesel Generator 1-1 Unable to Maintain Constant Load.Caused by Generator Droop Setting Being Out of Adjustment.Droop Adjusted (← links)
- 05000255/LER-1981-023, Forwards LER 81-023/03L-0 (← links)
- 05000255/LER-1981-024-03, /03L-0:on 810606,diesel Generator 1-1 Valve CV- 0884 Observed Passing Full Flow W/Actuator in Closed Position.Caused by Sheared Operator to Valve Shaft Key Due to Damaged Liner Permitting Misalignment of Shaft & Disc (← links)
- 05000255/LER-1981-024, Forwards LER 81-024/03L-0 (← links)
- 05000255/LER-1981-012-01, /01T-0:on 810331,safety Injection Tank T-82A Level Decreased Below Requirements.Caused by Leaking Safety Injection Control Valve PCV-3042.Valve Will Be Repaired (← links)
- 05000255/LER-1981-029-03, /03L-0:on 810706,diesel Generator Control Power Supply Breaker 72-301 Tripped.Caused by Slipped Wire Making Contact W/Ground During Rewiring of Temp Switch on Diesel Generator 1-1.Breaker Reclosed (← links)
- 05000255/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000255/LER-1981-021-03, /03L-0:on 810527,alarms Would Not Reset Following Routine Test of Annunciator Panels.Caused by Relay Coil Failure.Relay Repaired (← links)
- 05000255/LER-1981-021, Forwards LER 81-021/03L-0 (← links)
- 05000255/LER-1981-020-03, /03L-0:on 810522,during Normal Operations,Daily PCS Leak Rate Calculation Results Indicated Unidentified Leakage.Leak Isolated in Packing on Auxiliary Spray Stop Valve.Caused by Packing Degradation (← links)
- 05000255/LER-1981-020, Forwards LER 81-020/03L-0 (← links)
- 05000255/LER-1981-018-03, /03L-0:on 810509,snubber 40 (LPSI Pump Suction) Discovered Leaking Oil.Possibly Caused by O-ring Failure. Snubber Replaced.Investigation Continuing (← links)
- 05000255/LER-1981-018, Forwards LER 81-018/03L-0 (← links)
- 05000255/LER-1981-017-03, /03L-0:on 810501,during post-const Review of as-built Drawings,Determined That Pipe Supports Were Not Installed in Specified Locations,Resulting in Indeterminate Seismic Restraint Capability.Caused by Installation Error (← links)
- 05000255/LER-1981-007-03, /03L-0:on 810122,overspeed Trip Device for Turbine Driven Auxiliary Feedwater Pump Found in Tripped Condition. Caused by Accidental Bumping of Overspeed Trip Due to Moving of Gas Bottles Into Auxiliary Feedwater Pump Room (← links)
- 05000255/LER-1981-008-03, /03L-0:on 810124,component Cooling Water Pump P-52C Motor Caught on Fire.Caused by Motor Bearing Failure Due to Oil Loss.Motor Replaced (← links)
- 05000255/LER-1981-006-03, /03L-0:on 810119,drain Valve,Mv 504 Fps,In Southwest Cable Penetration Room Fire Sprinkler Supply Line Failed.Caused by Bonnet Separating from Valve Body Due to Overtightening.Valve Replaced (← links)
- 05000255/LER-1981-005-01, /01L-0:on 810121,copper Tubing to 1-2 Diesel Generator Svc Water Low Pressure Alarm PS-1473 Broke.Caused by Workman Accidentally Bumping Tubing.Workman Cautioned Re Handling of safety-related Equipment (← links)
- 05000255/LER-1980-043-01, /01T-0:on 801106,measured Leakage Through Containment Penetration 14 Exceeded Tech Spec Limit.Cause Under Evaluation.Check Valve & Butterfly Valve Seat Replaced (← links)
- 05000255/LER-1980-030-03, /03L-0:on 800811,during Normal Operation, Discovered Indicating Lamps for CV-0437B & CV-0438B (Iodine Removal Sys Tanks Outlet Valves) Were Not Lit.Caused by Moisture in Junction Box Resulting in Blown Fuses (← links)
- 05000255/LER-1981-004-01, /01T-0:on 810128,during Evaluation of Masonry Walls Per IE Bulletin 80-11,28 Walls Did Not Meet Acceptance Criteria.Caused by Changes in Acceptance Criteria.Corrective Methods Being Developed (← links)
- 05000255/LER-1981-010-03, /03L-0:on 810205,primary Indicating Position Datalogger Became Inoperable.Caused by Failure of mercury- Wetted Relay in Gain Selection Portion of Input Amplifier of A/D Converter.Relay Replaced (← links)
- 05000255/LER-1981-002-03, Determined That 125 Volt DC Distribution Panel D21A Mounting Did Not Meet Seismic Restraint Criteria.Caused by Engineering Judgment Error. Frame Holding Panel Modified by Adding Braces (← links)
- 05000255/LER-1981-003-03, /03L-0:on 810107,HPSI Motor Operated Valve MOV-3011 Failed to Open Upon Initiation of Test Signal. Caused by Dirty Contacts in DBA Sequencer 34-3.Contacts Cleaned & Proper Valve Operation Restored (← links)
- 05000255/LER-1980-040-01, /01T-0:on 801023,while Sluicing Resins from T-50 to T-69,waste Gas Monitor RIA-1113 Alarmed,Indicating Airborne Release.Caused by Leakage in T-50 Air Supply. Waste Gas Surge Tank Was Pumped Down (← links)
- 05000255/LER-1980-042-01, /01T-0:on 801031,during Plant Cooldown,Steam Generator Dp Exceeded 1,380 Psid Limit for Approx 85 Minutes.Caused by Operator Misplotting of Power Conversion Sys Vs Pressure.Operator Counseled (← links)
- 05000255/LER-1980-041-01, /01T-0:on 801030,during Routine Surveillance Testing of Diesel Generator 1-2,emergency Diesel Generator Charging Was Inoperable for Tests While Pump P-55C Was Inoperable for Repairs.Caused by Deficient Test Procedure (← links)
- 05000255/LER-1980-039-03, /03L-0:on 801023,during Review of Testing Requirements for CV-3027 & CV-3056 It Was Determined That Valves Must Be Stroked Quarterly.Caused by Testing Requirements Not Addresing Potential for Degraded Equipment (← links)
- 05000255/LER-1980-017, Forwards Updated LER 80-017/03X-1 (← links)
- 05000255/LER-1980-019, Forwards LER 80-019/01T-0 (← links)
- 05000255/LER-1980-011, Forwards LER 80-011/03L-0 (← links)
- 05000255/LER-1980-004, Forwards LER 80-004/01T-0 (← links)
- 05000255/LER-1979-032, Forwards LER 79-032/03L-0 (← links)
- 05000255/LER-1979-031-03, /03X-1 on 790628:uncontrolled Release of Gases Occurred During Power Reduction.Caused by Removal of Relief Valve for Repair.Valve Repaired & Replaced (← links)
- 05000255/LER-1979-025-01, /01X-1 on 790619:heat Transfer Coefficients of Component Cooling Water Heat Exchanger Were Less than Required.Caused by Fouled Tube Sides.Tubes Will Be Cleaned More Frequently (← links)
- 05000255/LER-1979-001-03, /03L-0 on 790102:reactor Protection Sys Power Range Channels NI05,06 & 07 Bypassed W/O First Tripping NI08.Caused by Failure to Use Administrative Controls (← links)
- 05000255/LER-1979-007-03, /03L-0 on 790115:primary Computer Stopped.Caused by Computer Program Failure.Computer Reprogrammed to Restore Operability (← links)
- 05000255/LER-1979-041, Forwards LER 79-041/01T-0 (← links)
- 05000255/LER-1979-042, Forwards LER 79-042/01T-0 (← links)
- 05000255/LER-2018-003-01, Indications Identified in Reactor Pressure Vessel Head Nozzle Penetrations (← links)
- 05000255/LER-1978-041-01, /01T:on 781214,dtermined That Insufficient High Pressure Safety Injection Flow Would Be Delivered to Core in Event of Small Break Loca.Caused by Redundant High Pressure Safety Injection Header Being Valved Out of Svc (← links)
- 05000255/LER-1978-040-01, /01X-1:on 781128,during Venting of Waste Gas Surge Tank,Leakage Resulted in Gaseous Release W/O 15-day Holdup Time.Cause Under Evaluation.Rept Will Be Issued by 790105, Not 780105 as Previously Reported (← links)
- 05000255/LER-1978-033-01, /01T-0:on 781025,during 15-day Isolation of Waste Gas Decay Tank,Part of Tank Contents Leaked Out.Caused by Faulty Pressure Instrumentation.Instrumentation Recalibr (← links)
- 05000255/LER-1978-007-01, /01T-0:on 780313,during Sealing of Electrical Connectors Located Inside Containment,Sockets &/Or Sealing Plugs Were Discovered Missing from Connectors.Caused by Connector Holes Not Being Filled During Wiring (← links)
- 05000255/LER-1979-035, Forwards LER 79-035/01T-0 (← links)
- 05000255/LER-2019-002, Automatic Reactor Trip and AFW System Actuation Due to the Loss of Power to the RPS Bd Matrix (← links)
- 05000255/LER-2019-001, Reactor Protection System and Auxiliary Feedwater System Actuation Due to Turbine Governor Valve Failure (← links)
- 05000255/LER-2018-003, Indications Identified in Reactor Pressure Vessel Head Nozzle Penetrations (← links)
- 05000255/LER-2075-013, Letter Submitting Abnormal Occurrence Report AO-75-13 Which Covers Release of Heated Water at Rate Exceeding Technical Specification Limits (← links)
- 05000255/LER-2075-012, Letter Submitting Abnormal Occurrence Report AO-12-75, Describing Deficiencies Associated with Chlorination Treatment of the Closed Cycle Condenser Cooling System (← links)
- 05000255/LER-2075-004, Letter Submitting Unusual Event Report No. 75-4 Covering Explanation for 9-Inch Deviation on Control Rod No. 38 (← links)
- 05000255/LER-2075-011, Letter Submitting Abnormal Occurrence Report AO-11-75 Which Involves Safety Setting on Linear Power Channel of Reactor Protective System (← links)
- 05000255/LER-2075-014, Letter Submitting Abnormal Occurrence Report No. 75-14 Which Covers Failure of Bus 1D to Transfer from Station Power to Start-up Power (← links)
- 05000255/LER-2075-017, Letter Submitting Abnormal Occurrence Report A0-75-17 Covering Release of Gaseous Waste with Shorter than Permissible Holdup Period. No Activity Limits Were Violated (← links)
- 05000255/LER-2075-003, For Palisades Nuclear Plant, During Modifications to Systems Associated with Postulated High-Energy Line Breaks Outside Containment, Three Procedural Deficiencies Involving Review of Design Changes and Documentation Were Detect (← links)
- 05000255/LER-2074-028, Abnormal Occurrence Report AO-28-74: Release of North Filtered Waste Tank, Laundry Waste, Without Prior Sampling (← links)
- 05000255/LER-2075-010, Licensee Event Report No. Nre 75-10 Re Component Cooling Water Leak to the Service Water Heater (← links)
- 05000255/LER-2074-003, Unusual Event Report UE-74-3 Re Possible Loss of Special Nuclear Material (SNM) (← links)
- 05000255/LER-2075-007, Abnormal Occurrence Report AO-75-7 Re Release of Heated Water at Rate & Temperature Exceeded Tech Spec Limits (← links)
- 05000255/LER-2075-002, Unusual Event Report UE-75-2 Re Failure of Control Rod No. 30 to Drop Properly (← links)
- 05000255/LER-2075-005, Abnormal Occurrence Report AO-75-5 Re Release of Small Quantity of Unsampled Liquid Waste (← links)
- 05000255/LER-2075-025, Licensee Event Report AO-75-25: Discovery of Error in Computer Program Used to Set In-Core Detector Alarm Limits (← links)
- 05000255/LER-2076-001, Licensee Event Report ER-76-01 - Sirw Vent Plugged (← links)
- 05000255/LER-2076-002, Licensee Event Report ER-76-02 - Rps/Sis - Ps Out of Calibration (← links)
- 05000255/LER-2076-004, Licensee Event Report ER-76-04 - MSIV Closure Set Point Was Found Below Tech Spec Limit of Greater than 500 Psia on Two Instruments (← links)
- 05000255/LER-2076-006, Licensee Event Report ER-76-06 - Several CRDM Inner Bearing of Clutches Would Not Rotate When Turned by Hand or a Number of Others Did Not Rotate Freely (← links)
- 05000255/LER-2076-007, Licensee Event Report ER-76-0087: Reactor Protective System, Main Steam Flow Transmitter Was Found Out of Tolerance During Surveillance Testing, & Transmitter Could Not Be Recalibrated (← links)
- 05000255/LER-2074-015, Correction to Licensee Event Report AO-74-15: Abnormal Occurrence Relating to Containment Air Cooler Temperature Control Valve Body Failure. Spare Valve Procurement Requirement Has Been Changed to ANSI B31.1 (← links)
- 05000255/LER-2076-008, Licensee Event Report ER-76-008, Gaseous Release, Which Was Caused by Operational Error, Not Released Above Permissible Levels (← links)
- 05000255/LER-2076-009, Licensee Event Report ER-76-009, Containment Spray, a Condition Leading to Operation in a Degraded Mode (← links)
- 05000255/LER-2076-012, Licensee Event Report ER-76-0102, for Long-Term Cooling Qualification, Two Valves, CV-2113 & CV-2115, Associated with Charging System, May Not Meet Code Requirement (← links)
- 05000255/LER-2076-010, Licensee Event Report ER-76-010, During Testing, the Charging Pump, P55-A, Failed to Perform Properly (← links)
- 05000255/LER-2076-013, Licensee Event Report ER-76-013, Discharge of Cooling Water Above 5oF Limit (← links)
- 05000255/LER-2076-021, Licensee Event Report ER-76-21 - Containment Purge Supply Valve, a Condition Leading to Operation on a Degraded Mode (← links)
- 05000255/LER-2076-014, Licensee Event Report ER-76-14, Relating to Removing Diesel Generator from Service, Advising, Corrective Action Will Be Completed About 8/1/1976, Not by 7/1/1976 as Transmitted on 5/25/1976 (← links)
- 05000255/LER-2076-024, Licensee Event Report ER-76-24 - Exceeding Pdil Limits, Which Will Be Resolved Through Clarification of Present Plant Technical Specification (← links)
- 05000255/LER-2076-003, Licensee Event Report ER-76-03 - CCW P52-C Inboard Bearing Failed While Preventative Maintenance Was Being Performed on CCW Pump P52-A (← links)
- 05000255/LER-2076-023, Corrected Licensee Event Report ER-76-23: Changing Typographical Error of Event Report No. ER-76-03 to ER-76-23 - Dealing with CCW Pump P-52-C, Inboard Bearing Failure (← links)
- 05000255/LER-2076-026, Licensee Event Report ER-76-26 - Plant Discharge Temperature Increased More Rapidly than Expected (← links)
- 05000255/LER-2076-027, Licensee Event Report ER-76-27 - Containment Purge Supply Valve (← links)
- 05000255/LER-2076-025, Licensee Event Report ER-76-25 - Hydrogen Recombiner, a Condition Leading to Operation on a Degraded Mode (← links)
- 05000255/LER-2080-006, Submittal of LER 1980-006-00 Purge Valve T-Ring Air Supplies (← links)
- 05000255/LER-2080-008, Submittal of LER 1980-008-00 Update of Valve Leakage (← links)
- 05000255/LER-2088-005-01, Inadequate Procedure Results in Valve Testing During Prohibited Conditions (← links)
- 05000255/LER-2076-028, License Event Report 1976-028-00 Re Rod Sequencer Operation (← links)
- 05000255/LER-2076-029, License Event Reports 1976-029-00, 1976-030-00, & 1976-031-00 Re Control Rod Drives (← links)
- 05000255/LER-2076-017, License Event Report 1976-017-00 Re Failure of RPS Matrix Relays (← links)
- 05000255/LER-2076-034, License Event Reports 1976-034-00 & 1976-035-00 Re Discharge Cooling Water Above 5oF Limit (← links)
- 05000255/LER-2076-036, License Event Report 1976-036-00 Re Containment Air Locks (← links)
- 05000255/LER-2076-041, License Event Report 1976-041-00 Re Chlorine Discharge Limit Exceeded (← links)
- 05000255/LER-2076-037, License Event Report 1976-037-00 Re Out-of-Spec Point of Neutron Monitor Channel C (← links)
- 05000255/LER-2076-038, License Event Reports 1976-038-00, 1976-039-00, 1976-040-00, & 1976-042-00 Re Discharge Cooling Water Above 5oF Limit (← links)
- 05000255/LER-2076-045, License Event Report E1976-045-00 Re Failure of DBA Sequencer to Operate (← links)
- 05000255/LER-2076-043, License Event Report 1976-043-00 Re Leak in Charging Pump Suction Line (← links)
- 05000255/LER-2076-046, Re Chemicals Passed Through Neutralizer Tank Into Plant Discharge Structure (← links)
- 05000255/LER-2076-044, License Event Report 1976-044-00 Re Drift of Reactor Protection System Steam Generator Low Level Trip Set Point (← links)
- 05000255/LER-2077-001, License Event Report 1977-001-00 Control Rod Drive. Due to Seal Leakage Problems, CRDM No 4 Is Being Considered Inoperable (← links)
- 05000255/LER-2077-004, License Event Report 1977-004-00 Discharge Cooling Water Above 5oF Limit (← links)
- 05000255/LER-2077-006, License Event Reports 1977-006-00 & 1977-008-00 Control Rod Misaligned (← links)
- 05000255/LER-2077-009, License Event Report 1977-009-00 Re Discharge Cooling Water Above 5oF Limit (← links)
- 05000255/LER-2077-010, License Event Report 1977-010-00 Re Four PCP Loss of Flow (← links)
- ML070600639 (redirect page) (← links)
- 05000255/LER-2007-010, Technical Specification Action Requirements Not Met for Battery Cell Parameter Outside Allowable Limits (← links)
- 05000255/LER-2007-009, For Palisades, Regarding Automatic Valve in Emergency Core Cooling System Inoperable in Excess of Technical Specification Requirements (← links)
- 05000255/LER-2007-008, Regarding Auxiliary Feedwater Pump Inoperable in Excess of Technical Specification Requirements Due to a Postulated Steam Line Break (← links)
- 05000255/LER-2007-007, Fuel Handling Area Ventilation System Inoperable (← links)
- 05000255/LER-2007-003, Cancellation of Licensee Event Report 07-003, Potential for Reduced Component Cooling Water Cooling Capability (← links)
- 05000255/LER-2007-006, Emergency Diesel Generator Inoperable in Excess of Technical Specification Requirements (← links)
- 05000255/LER-2007-004, Regarding Shutdown Cooling Train Inoperable (← links)
- 05000255/LER-2007-002, Re Inoperable Containment Due to Containment Air Cooler Through-Wall Flaw (← links)