Pages that link to "05000317/LER-2014-001, Regarding Reactor Trip Due to Turbine Control System Reboot"
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The following pages link to 05000317/LER-2014-001, Regarding Reactor Trip Due to Turbine Control System Reboot:
Displayed 17 items.
- 05000317/LER-2014-001 (redirect page) (← links)
- ENS 49754 (← links)
- 05000317/LER-2001-002 (← links)
- 05000317/LER-2001-001 (← links)
- 05000317/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000317/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000317/LER-1982-029, Forwards LER 82-029/01T-0 (← links)
- 05000317/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000317/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000317/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000317/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000317/LER-1981-025, Forwards LER 81-025/03L-0 (← links)
- 05000317/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000317/LER-1982-061, Forwards LER 82-061/03X-0 (← links)
- 05000317/LER-1982-057, Forwards LER 82-057/03L-0 (← links)
- 05000317/LER-1981-035, Forwards LER 81-035/03L-0.Detailed Event Analysis Encl (← links)
- 05000317/LER-1982-053, Forwards LER 82-053/03X-1 & Corrected Prompt Rept RO 82-53. Repts Appropriate for Unit 1 Only (← links)
- 05000317/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000317/LER-1983-007, Forwards LER 83-007/03L-0 (← links)
- 05000317/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000317/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000317/LER-1982-046, Forwards Corrected 820826 Cover Ltrs Transmitting LER 82-046/03L-0 & LER 82-037/03L-0 (← links)
- 05000317/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000317/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000317/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000317/LER-1982-069, Forwards LER 82-069/03L-0 (← links)
- 05000317/LER-1982-074, Forwards LER 82-074/03L-0 (← links)
- 05000317/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000317/LER-1982-056, Forwards LER 82-056/03L-0 (← links)
- 05000317/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000317/LER-1982-050, Corrected Ltr Forwarding LER 82-050/03L-0 (← links)
- 05000317/LER-1981-016, Forwards LER 81-016/03L-0 (← links)
- 05000317/LER-1981-038, Forwards LER 81-038/04T-0 (← links)
- 05000317/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000317/LER-1981-028, Forwards LER 81-028/04T-0 (← links)
- 05000317/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000317/LER-1982-040, Forwards LER 82-040/01T-0 (← links)
- 05000317/LER-1981-026, Forwards LER 81-026/01T-0 (← links)
- 05000317/LER-1981-039, Forwards LER 81-039/03L-0 (← links)
- 05000317/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000317/LER-1981-014, Forwards LER 81-014/03L-0 (← links)
- 05000317/LER-1981-015, Forwards LER 81-015/03L-0 (← links)
- 05000317/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000317/LER-1980-052, Forwards LER 80-052/03L-0 (← links)
- 05000317/LER-1982-038, Forwards LER 82-038/03L-0 (← links)
- 05000317/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000317/LER-1978-048, Forwards LER 78-048/03L-0 (← links)
- 05000317/LER-1978-044, Forwards LER 78-044/03L-0 (← links)
- 05000317/LER-1978-047, Forwards LER 78-047/03L-0 (← links)
- 05000317/LER-1982-035, Forwards LER 82-035/01T-0 (← links)
- 05000317/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000317/LER-1982-030, Forwards LER 82-030/03L-0 (← links)
- 05000317/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000317/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000317/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000317/LER-1983-008, Forwards LER 83-008/01T-0 (← links)
- 05000317/LER-1983-003, Forwards LER 83-003/03L-0 (← links)
- 05000317/LER-1982-081, Forwards LER 82-081/03L-0 (← links)
- 05000317/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000317/LER-1982-079, Forwards LER 82-079/03L-0 (← links)
- 05000317/LER-1982-067, Forwards LER 82-067/03L-0 (← links)
- 05000317/LER-1982-073, Forwards LER 82-073/03L-0 (← links)
- 05000317/LER-1981-034, Forwards LER 81-034/03L-0 (← links)
- 05000317/LER-1982-070, Forwards LER 82-070/01T-0 (← links)
- 05000317/LER-1982-072, Forwards LER 82-072/04X-0 (← links)
- 05000317/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000317/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000317/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000317/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000317/LER-1982-065, Forwards LER 82-065/03L-0 (← links)
- 05000317/LER-1982-066, Forwards LER 82-066/03L-0 (← links)
- 05000317/LER-1982-063, Forwards LER 82-063/03L-0 (← links)
- 05000317/LER-1982-064, Forwards LER 82-064/03L-0 (← links)
- 05000317/LER-1982-058, Forwards LER 82-058/03L-0 (← links)
- 05000317/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000317/LER-1982-060, Forwards LER 82-060/04X-0 (← links)
- 05000317/LER-1982-078, Forwards LER 82-078/03L-0 (← links)
- 05000317/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000317/LER-1982-086, Forwards LER 82-086/04X-0 (← links)
- 05000317/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000317/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000317/LER-1983-019, Forwards LER 83-019/01T-0 (← links)
- 05000317/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000317/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000317/LER-1983-009, Forwards Updated LER 83-009/03X-1 (← links)
- 05000317/LER-1981-083, Forwards Updated LER 81-083/03X-1 (← links)
- 05000317/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000317/LER-1982-062, Forwards LER 82-062/03L-0 (← links)
- 05000317/LER-1982-022, Updated LER 82-022/01T-1:on 820503,total Type B & C Penetration Leakage Calculations Compared to Wrong Spec. Caused by Incorrectly Revised Local Leak Rate Surveillance Test Procedure.Procedure Revised (← links)
- 05000317/LER-1981-078, Forwards Updated LER 81-078/03X-1 (← links)
- 05000317/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000317/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000317/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000317/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000317/LER-1982-005, Forwards LER 82-005/03L-0 (← links)
- 05000317/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000317/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000317/LER-1980-041, Forwards Updated LER 80-041/01X-1 (← links)
- 05000317/LER-1988-001, Advises That LER 88-01 Has Been Canceled.Rept Given to Senior Resident Inspector for Info Purposes (← links)
- 05000317/LER-1981-073, Forwards Updated LER 81-073/03X-1 (← links)
- 05000317/LER-1982-021, Forwards Updated LER 82-021/03X-1 (← links)
- 05000317/LER-1981-056, Forwards Updated LER 81-056/01X-1 (← links)
- 05000317/LER-2024-001-01, Condition Prohibited by Technical Specifications Due to Safety Injection Check Valve Not Full Closed (← links)
- 05000317/LER-2024-002, Emergency Diesel Generators Automatic Start Due to Loss of a 13kV Bus (← links)
- 05000317/LER-2024-003, A Diesel Generator Inoperable Due to Potential Transformer Failure (← links)
- 05000317/LER-2024-001, Condition Prohibited by Technical Specifications Due to Safety Injection Check Valve Not Full Closed (← links)
- 05000317/LER-2023-001, Condition Prohibited by Technical Specifications Due to Failure to Sample Diesel Generator Fuel Oil Storage Tank (← links)
- 05000317/LER-2020-001, Regarding Undervoltage Condition on 4.16kV Electrical Bus 11 Resulted in Actuation of Emergency Diesel Generator 1 a (← links)
- 05000317/LER-1989-014, :on 890723,determined That Saltwater Header 12 Incapable of Withstanding Seismic Event Intact & Could Result in Failure of Svc Water Hx.Caused by Inadequate Welding of Spool Pieces.Spool Pieces Repaired (← links)
- 05000317/LER-1989-015, :on 890822,determined That Calculations Used to Determine That Dousing Sys for Containment Iodine Filters Not Required to Be Environmentally,In Error.Justification for Continued Operation Will Be Established (← links)
- 05000317/LER-1988-014, :on 881029,while Performing Surveillance Test Procedure to reverse-flow Test Check valves,MS-103 Leaked By.Caused by Excessive Cycling Due to leak-by of MS-102. Check Valve MS-103 Replaced W/Identical Valve (← links)
- 05000317/LER-1989-011, :on 890630,missing Fire Damper Discovered in Spent Fuel Pool Ventilation Sys.Caused by Error in Facilities Change Request That Installed Fire Dampers.Action Statement Entered & 1 H Rept Made (← links)
- 05000317/LER-1998-007, :on 980404,eight of Sixteen MSSVs on Unit 1 Lifted at Pressure Above Setpoint Required in Tech Specs During as-found Lift Test.Cause of Event Currently Under Investigation.Reset Failed Valves (← links)
- 05000317/LER-1989-010, :on 890614,determined That High Energy Break Temp Profile Not Correct for 5 Ft East Piping Penetration Room.Cause Not Stated.Equipment Qualification Design Manual Updated to Reflect Correct Temp Profile (← links)
- 05000317/LER-1989-013, :on 890731,missing Steps in Surveillance Test Procedure Discovered Resulting in Failure to Comply W/Tech Spec Surveillance.Caused by Personnel Error.Review of Test Procedures Performed to Satisfy Requirements (← links)
- 05000317/LER-1989-009, :on 890515,preliminary Evaluation Concluded That Util May Not Have Adequate Assurance to Bring Down Unit to Cold Shutdown Condition,Per App R Requirements. Caused by Inadequate Procedure (← links)
- 05000317/LER-1989-012, :on 890720,technician Discovered Solenoid Disconnected from Associated Halon Cylinder.Cause Unknown. Halon Sys Declared Inoperable & Hourly Fire Watch Established.Solenoid Reconnected & Verified (← links)
- 05000317/LER-1989-007-01, :on 890317,identified Bent Vertical Support for Piping Restraint on Shutdown Cooling Portion of LPSI Suction Piping.Caused by Slamming Shut of LPSI Pump 12 Discharge Check Valve.Restraint Replaced (← links)
- 05000317/LER-1989-005, :on 890314,instrument Air Boundary Check Valve Determined by Test to Allow Excessive Back Leakage.Caused by Matl Wear Causing Poor Seating Surface.Check Valve Isolated & New Flow Path Was Initiated (← links)
- 05000317/LER-1989-004, :on 890320,while in Mode 5 at 130 Degrees F & 240 Psia Reactor Coolant Temp & Pressure,Operators Caused Inadvertent Partial Actuation of Esf.Event Reviewed W/Each Operations Crew (← links)
- 05000317/LER-1989-006-01, :on 890508,containment Iodine Filters Outside Design Basis Could Not Perform Design Function for Length of Time Assumed in FSAR Accident Analysis.Caused by Power Cable No Longer Qualified Beyond 96 H (← links)
- 05000317/LER-1989-008-01, :on 890508,engineering Personnel Determined That Instrument Air Supply Tubing Could Not Be Determined to Conform W/Design Requirements for Seismic Support on Eight Valves.Caused by Poor Maint Practices (← links)
- 05000317/LER-1989-003, :on 890319,operators Caused Inadvertent Actuation of ESF by Not Following Procedure step-by-step When Reinstating Block signal.INPO-assisted Formal Human Performance Evaluation Performed (← links)
- 05000317/LER-1987-007, :on 870401,mgt Decided to Shutdown Facility from 100% Power,Mode 1 Operation,To Mode 5 (Less than 200 F).Extensive Insp Program Undertaken to Look in Detail at Equipment within Scope of 10CFR50.49 (← links)
- 05000317/LER-1987-012, :on 870723,all Offsite Nonemergency Power Lost Due to Faulty Circuit Breaker Operation.Fault Caused by Transmission Line Contact W/Tree.Incorrect Breaker Trip Due to Faulty Logic Card.Trees in Area Removed (← links)
- 05000317/LER-1987-011, :on 870714,reactor Tripped on High Steam Generator Water Level.Caused by Excess Feedwater Cooling Event Combined W/Overboration Event.Operator Training Module Will Be Developed Re Loss of Feedwater Heaters (← links)
- 05000317/LER-1987-015, :on 871111,reactor Tripped Due to Transformer. Caused by weather-related Problems.Atmospheric Dump Valve Scheduled for Maint Overhaul & Time Delay Will Be Installed on Auxiliary Feedwater Actuation Setpoint (← links)
- 05000317/LER-1987-014, :on 871016,containment Air Lock Door Seal Functional Test Not Performed within 72 H After Use.Caused by Administrative Oversight.Appropriate Employees Will Be Counseled (← links)
- 05000317/LER-1989-002, :on 890214,Tech Spec Violations Discovered Due to Entry Into Mode 4 W/O Containment Purge Exhaust Isolation Valves & Air Supply Solenoid Valves in Denenergized State (← links)
- 05000317/LER-1987-009, :on 870423,uncertified Nuts Installed in Safety Sys.Caused by Inadequate Precautions on Repair & Replacement Planning Activities Re commercial-quality Fasteners.Poorly Installed Uncertified Fastener Replaced (← links)
- 05000317/LER-1987-013, :on 870911,reactor Automatically Tripped.Caused by Loose Connection in Breaker Which Controls Pump Starts. Reactor Coolant Pump (RCP) Surge Capacitators Replaced W/ Inductors Located at RCP Breaker Switchgear (← links)
- 05000317/LER-1989-001-01, :on 890208,coordinator Discovered That Since 880825 Three Startups Occurred W/O Operability of Manual Trip Channels Due to Missing Page from Procedure STP-0-6-1. Caused by Lack of Administrative Steps (← links)
- 05000317/LER-1999-006, :on 990922,manual Reactor Trip Was Noted.Caused by Inadequate Electrical Current Determination.Evaluated Trip Risk Assessment Process for Enhancements.With (← links)
- 05000317/LER-1998-004, :on 980303,battery Charger Circuit Breakers Were Noted Missing from Seismic Positioner.Caused by Quality Issue Related to Vendor.All safety-related 480-volt Circuit Breakers Have Been Inspected (← links)
- 05000317/LER-1998-006, :on 980325,1B DG Failed to Start During Performance of Routine Surveillance Test.Caused by Piece of Nylon in Governors Shutdown Solenoid Valve.Conducted Review (← links)
- 05000317/LER-1998-005, :on 980312,spare Reactor Trip Breaker Did Not Meet TS Requirements.Caused by Inadequate Procedures.Revised Procedures to Include Testing Requirements for Spare Breaker (← links)
- 05000317/LER-1986-005-01, :on 861001,main Vent wide-range Noble Gas Effluent Monitors Declared Inoperable.Caused by Deficient high- & mid-range Detector Calibr.Unit 1 Detectors Replaced & Unit 2 Detectors Recalibr & Returned to Svc (← links)
- 05000317/LER-1986-006-01, :on 861010,reactor Tripped Due to Loss of Load Trip as Result of Turbine Trip from Partial Loss of Condenser Vacuum.Caused by Operator Error.Operating Shift Will Be Briefed on Test Procedure (← links)
- 05000317/LER-1987-010, :on 870427,potential Pressurizer Spray Valve Bonnet Weld Deficiency Discovered.Caused by Improperly Performed Mod.Welds Repaired by Adding 1/4-inch Thickness to Existing Welds w/3-to-1 Taper Into Base Matl (← links)
- 05000317/LER-1987-008, :on 870414,borated Water Sprayed Into Containment Bldg While Attempting to Fill Safety Injection Tanks.Caused by Improper Valve Lineup.Procedural Changes Implemented & Instructions Issued (← links)
- 05000317/LER-1986-007-01, :on 861011,automatic Actuation of Reactor Protection Sys on High Axial Shape Index Initiated Reactor Trip.Caused by Lack of Detailed Procedural Guidance for Specific Plant Conditions (← links)
- 05000317/LER-1987-005, :on 870217,isolation of Recirculation Actuation Sys Level Swiches Which Sense Refueling Water Tank Level Occurred.Caused by Miscommunication Between Control Room Operator & Plant Roundsman.Operators Counseled (← links)
- 05000317/LER-1987-004, :on 870302,unit Manually Tripped Due to High Pressurizer Pressure from Turbine Runback.Caused by Improper Procedural Guidance to Reducing Main Generator Hydrogen Pressure.Procedures Revised (← links)
- 05000317/LER-1986-004-01, :on 860720,reactor Automatically Tripped on Low Reactor Coolant Flow Trip Signal.Caused by Surge Capacitor Internally Shorted to Ground.Capacitor Degradation Checks Will Be Conducted Each Refueling Outage (← links)
- 05000317/LER-1998-011, :on 980428,prematurely Released Fire Watch Was Noted.Caused by Inadequate Cure Time Communications.Revised Configuration Control Documents.With (← links)
- 05000317/LER-1987-003, :on 870127,reactor Tripped Due to Decreasing Steam Generator Levels.Caused by Loss of Instrument Air Pressure.Pressure Restored.Engineering Analysis to Increase Reliability of Air Sys Performed (← links)
- 05000317/LER-1999-005, :on 990720,corrosion Behavior & Onset of Oxide Spalling of High Duty Fuel Noted on Fuel Assemblies.Caused by Normal Phenomenon.Operability Evaluation for Current Cycle Operation Will Be Performed.With (← links)
- 05000317/LER-1997-006, :on 970722,cable Spreading Room Halon Sys Was Inoperable.Caused by Personnel Error.Operations Personnel Reminded of Possibility of Inoperable Dampers Affecting Halon Sys Operability (← links)
- 05000317/LER-1999-003, :on 990701,recognized That Unapproved Methodology Was Used to Allow CREVS to Remain Operable in accept-as-is Condition.Regulatory Notification Required in 10CFR50.72(b)(1)(ii)(A) Performed.With (← links)
- 05000317/LER-1987-001, :on 861210,one Shutdown Cooling Loop Discovered Operable While Refueling Pool Drained to Level of Less than 23 Ft Above Top of Reactor Core.Caused by Lack of Procedural Guidance.Procedures Revised (← links)
- 05000317/LER-1988-009, :on 880824,Unit 1 Tripped on Loss of Load When Main Turbine Tripped on High Steam Generator Level.Caused by Vibration & Stress.Walkdown Performed on Selected Components & Pressure Switch Relocated (← links)
- 05000317/LER-1988-006-01, :on 880715,unit Tripped on Loss of Load When Turbine Tripped.Caused by Unclear Procedures Being Misinterpreted by Technicians.Maint Planners Trained in Formulating Clear Maint Instructions (← links)
- 05000317/LER-1998-009, :on 980408,required Hourly Fire Watch Missed, When Contractor Maint Worker Failed to Perform Fire Watch Patrol.Caused by Personnel Error.Plant Mgt Reiterated Expectation to Contractor Personnel.With (← links)
- 05000317/LER-1987-006, :on 870310,pressurizer Quench Tank Pressure Indicated That Rupture Disk Had Ruptured.Caused by Setpoint Being Out of Spec.Safety Valve Replaced (← links)
- 05000317/LER-1986-003-01, :on 860430,during Review of Quarterly Surveillance Test Procedure for 125-volt Dc Battery 22, Discovered That Nine Cells Had Electrolyte Levels Above Cell Jar High Level Mark (← links)
- 05000317/LER-1997-010, :on 971210,1B EDG Failed to Start During Performance of Routine Surveillance Test.Caused by Piece of Stainless Steel Foreign Matl in Governor Hydraulic Boundaries.Stainless Steel Replaced.With (← links)
- 05000317/LER-1998-002, :on 980107,fire Hose Station & Room Sprinkler Sys Were Noted out-of-service.Caused by Operating Mislabeled Valve.Correct Tagout Boundary Was Established & Verified by Addl Complete Walkdown of Tagout (← links)
- 05000317/LER-1997-007, :on 971029,discovered That Three Surveillance Test Procedures Were Not Completed within Test Interval. Caused by Excessive Use of 25% Grace Period Allowed for Completion of Surveillance.Revised Procedures (← links)
- 05000317/LER-1998-003, :on 980113,damage Was Found on Stanchion & Restraining Steel of Unit 1 LPSI Sys Pipe Support Location on Common Discharge Line.Caused by LPSI Pump Discharge Check Valve Slam(S).Pipe Support Was Removed (← links)
- 05000317/LER-1998-001, :on 980104,Unit 1 Entered Condition Outside of Tech Specs Due to Having Both Secondary Control Element Assembly Position Indications out-of-svc.Caused by Position Indication Being Inoperable.Procedure Revised (← links)
- 05000317/LER-1997-009, :on 971024,automatic Reactor Trip Occurred. Caused by Failure to Properly Terminate Electrical Lead on Condenser Vacuum Breaker Handswitch During Prior Handswitch Maintenance.Over 200 Similar Connection Insp (← links)
- 05000317/LER-1986-002, :on 860322,shutdown Cooling Return motor- Operated Valve in Suction Line of LPSI Pump Inadvertently Closed.Caused by Failure in Procedures to Ensure That Test Input Signal Will Not Close Valve (← links)
- 05000317/LER-1997-008, :on 971017,two Reactor Protective Sys Channels Were OOS During Test.Caused by Significant Variations in Power Supply Voltages.Requested Maint to Back Out of Calibr of Channel C & Return Channel to Svc (← links)
- 05000317/LER-1985-012, :on 851002,main Turbine Tripped on Erroneous Feedwater Heater 12C hi-hi Signal to Turbine Trip Circuit. Caused by Grounded Feedwater Heater Level Control Switch. Ground Control Switch Repaired (← links)
- 05000317/LER-1988-010, :on 880628,containment Personnel Air Lock Interlock Discovered Inoperable During Performance of Surveillance Test Procedure.Caused by Improper Use of Procedure W/Lack of Clarity.Training Provided (← links)
- 05000317/LER-1988-011, :on 881028,discovered That Pressurizer Code Safety Valve Performing Pressure Relief Function Above Max Value Allowed by Tech Specs.Caused by Difference in Temp Profile Conditions of Safety Relief Valves (← links)
- 05000317/LER-1998-008, :on 981020,reactor Protective Sys Instrumentation TS Error Was Noted.Caused by Incorrect Use of Thermal Power in Ts.Revised TSs 3.3.1 & 3.3.2.With (← links)
- 05000317/LER-1988-002-02, :on 880502,four Unplanned Safety Injection Actuation Signal Received & Initiated by Esfas.Caused by Interaction Between Established Sys Conditions.Procedures, Planning & Task Sequencing Improved (← links)
- 05000317/LER-1988-003-01, :on 880423,during eddy-current Testing,Plug Found in Outlet Tube Sheet in Tube Adjacent to Tube That Should Have Been Plugged.Caused by Personnel Error & Inoperable Tube Position Indicating Sys (← links)
- 05000317/LER-1986-001, :on 860123,automatic Reactor Trip Occurred During Monthly Testing of Reactor Protective Sys.Caused by Mechanical Failure of Reactor Trip Circuit Breaker 2. Breaker Replaced (← links)
- 05000317/LER-1988-008, :on 880716,unit Placed Into Mode 2 While Tech Specs Limiting Condition for Operation of Watertight Doors Not Satisfied.Caused by Personnel Error.Outsider Operator Log Modified & Training Sessions Conducted (← links)
- 05000317/LER-1988-005-01, :on 880613,Mode 4 Entered W/Containment Iodine Filter Out of Svc Due to Lack of Conformance to Environ Qualification Requirements.Caused by Personnel Error. Personnel Counseled Re Consequences of Event (← links)
- 05000317/LER-1985-003, :on 850405,7 of 16 Main Steam Valves Found to Be Out of Tolerance.Caused by Measurement Technique & Room Equilibrium Temp.Main Steam Safety Valves Reset Prior to Completion of Test (← links)
- 05000317/LER-1988-004-01, :on 880613,found That Containment Penetration Splice Connection Not Environmentally Qualified.Caused by Personnel Error During 1987 Insp & Deficiency Not Corrected. Connection Disassembled & Remade Per Std (← links)
- 05000317/LER-1997-004, :on 970602,trip Bypasses Were Not Removed When Thermal Power Was Increased Above 15%.Caused by Failure to Recognize Difference Between Nuclear Instrument & Delta-T. Revised Plant Procedures (← links)
- 05000317/LER-1997-005, :on 970529,reactor Coolant Sys Leak Occurred. Caused by Failed Compression Fitting.Conducted Review of Compression Fitting Maint Performed on High Pressure Systems & Completed Insps of Compression Fittings (← links)
- 05000317/LER-1980-069-03, /03L-0:on 801222,deviation Found Among Channels in Engineered Safety Features Actuation Sys.Caused by Channel D Bistable Voltmeter Shifting Out of Tolerance Due to Maint Activities.Bistable Meter Recalibr (← links)
- 05000317/LER-1997-003-01, :on 970424,fuel Moved in Spent Fuel Pool Without Charcoal Absorber Banks Being in Svc.Caused by Personnel Error.Fuel Movement Suspended Until All Appropriate Personnel Could Be Trained (← links)
- 05000317/LER-1986-002-01, :on 860322,shutdown Cooling Return Valve Closed During Test of Electromatic Relief Valve ERV 404.Caused by Invalid Test Procedures When Shutdown Cooling Activated. Procedures Reviewed (← links)
- 05000317/LER-1982-085-03, /03X-1:on 821230,ESFAS AL Sequencer Inoperable During Surveillance Testing & Handswitch for CTMT Spray Pump 11 Placed in pull-to-lock.Caused of Failure Unknown.Module Replaced.Failed Module Returned to Vendor (← links)
- 05000317/LER-1985-013, :on 851009,unidentified RCS Leakage Determined to Be Greater than 1.0 Gpm.Caused by Cracked Weld Between Reactor Coolant Pump Shaft Seal & Control Bleedoff Line.Line & Flanges Replaced.Design Mod Implemented (← links)
- 05000317/LER-1985-014, :on 851120,discovered One Isolation Damper in Each of Two Control Room HVAC Inlet Ducts Inoperable.Caused by Improper Adjustment of Damper Linkages.Blade Brackets Replaced & Procedure Changed (← links)
- 05000317/LER-1985-011, :on 850930,reactor Automatically Tripped on Loss of Load Due to Main Turbine Loss.Caused by Intermittent Ground or High Level Alarm in Circuitry Actuating Feedwater Heater (← links)
- 05000317/LER-1997-002, :on 970220,misread TS Requirements Resulted in Inadequate Test.Caused by Lack of Strict Adherence to Wording of Plants TS Requirements.Edgs 1B,2A & 2B Were Successfully Tested & Returned to Svc (← links)
- 05000317/LER-1985-008, :on 850806,main Turbine Tripped on High Moisture Separator Reheater Level.Caused by High Level Dump Manual Isolation Valve Being Left in Shut Position After Maint Performed.Work Forms Modified (← links)
- 05000317/LER-1985-010, :on 850807,reactor Trip Occurred Due to Main Turbine Trip.Caused by Improperly Set Thrust Bearing Wear Detector Device Trip Settings.Detector Removed for Maint & Investigation.Detector Readings Increased (← links)
- 05000317/LER-1985-009, :on 850806,reactor Tripped on Low Steam Generator Water Level Due to Insufficient Feed Pump Speed. Caused by Personnel Error.Evaluation Will Be Performed Frequently on Plant Simulator (← links)
- 05000317/LER-1997-001, :on 970110,spent Fuel Moved W/Ventilation Sys Inoperable & Missed Surveillance Occurred.Cause Analysis Being Performed to Determined Casual Factors & Generic Implications for Event.Surveillance Performed (← links)
- 05000317/LER-1995-005, :on 951109,manual Reactor Trip Occurred.Caused by Failure of Digital Feedwater Control Module FIC-1111. Reviewed Design Engineering Standards & Existing FP 2000 Digital Controllers Are Being Replaced (← links)
- 05000317/LER-1985-006, :on 850418,maint Personnel Removed Upper Guide Structure from Reactor Vessel W/O Fuel Handling Supervisor. Cause Not Stated.Procedures Revised to Require Fuel Handling Supervisor to Sign Off on Procedure (← links)
- 05000317/LER-1985-007, :on 850415,HPSI Sys Injection Leg Flow Rates Outside Tech Specs.Cause Not Stated.Tech Spec Changes Implemented (← links)
- 05000317/LER-1992-007, :on 921112,discovered Concern Re Shutting of ECCS min-flow Isolation Valves SI-659 & 660.Caused by Procedural Deficiency.Procedures & Testing Revised (← links)
- 05000317/LER-1992-008, :on 921124,plant Trip Occurred Due to Ground Fault in Isolated Phase Bus Duct Sys.Caused by Someone Stepping on & Loosening Window.Area Quarantined,Event Investigation Initiated & Repairs Completed (← links)
- 05000317/LER-1992-007-01, :on 921112,discovered Safety Concern Associated W/Monthly Recirculation Actuation Sys Channel for Testing. Cause of Event Under investigation.Self-assessment Process Review Will Be Conducted (← links)
- 05000317/LER-1980-007-01, /01X-0:on 800129,while Conducting Core Flush, Emergency Relief Valve RC-404 Opened.Apparently Caused by High Pressure Signal from Overpressure in Protection Circuit.Valve Shut W/Manual Override (← links)
- 05000317/LER-1979-061-01, /01X-0:on 791024,air Start Sys Hangers Failed to Meet Seismic Requirements Per IE Bulletin 79-14. Re-evaluation of Air Line for Seismic Support Requirements Underway (← links)
- 05000317/LER-1996-004, :on 960802,two Asi Channels OOS Due to Reversed Nuclear Instrumentation Leads.Leads Were Correctly Reconnected When Plant Was Brought Down on 960802 (← links)
- 05000317/LER-1985-005-01, :on 850406,inadvertent Initiation of Steam Generator Isolation Signal Occurred.Caused by Failure to Insert Keys Necessary to Block Signal in Keyswitches Prior to Cooldown Procedure.Procedure Modified (← links)
- 05000317/LER-1985-004, :on 850406,inadvertent ESF Actuation Occurred During Surveillance Testing While Facility in Mode 4.Caused by Inadequacy of Test Procedure.Esf Procedures Associated W/Blocked Signals Revised (← links)
- 05000317/LER-1992-005-01, :on 921016,MSSV Lift Settings Were in Excess of TS Allowable Limits.Caused by Inaccurate K Factors in Calculation of as-left Relief Valve Lifting Pressures for Affected Valves.Procedures Re K Factor Revised (← links)
- 05000317/LER-1992-003, :on 920521,test Personnel Found MSIV Pipe Tunnel Fire Damper Inoperable Due to Surveillance Procedure Omission.Ts Equipment cross-reference Database Will Be Updated & Drawings Will Be Made More Specific (← links)
- 05000317/LER-1984-017, :on 841226,channel a Linear Range Nuclear Instrument Lower Subchannel Pegged Low & Channel B Variable Overpower Trip Calculator Malfunctioned.Caused by Defective Lower Subchannel Connector (← links)
- 05000317/LER-1984-016, :on 841215,during Performance of Surveillance Test STP-0-67,HPSI Sys Injection Leg Flows Outside Tech Spec Requirement.Caused by Improperly Set Limit Switches.Switches Adjusted (← links)
- 05000317/LER-1984-018, :on 841203,MSIV Inoperable.Caused by Oil Leakage from Piston Rod Seal & Damaged Actuator Overall Piston Seals.Seals Replaced (← links)
- 05000317/LER-1984-019, :on 841212,MSIV Failed to Fully Close During Surveillance Testing.Caused by Faulty Contacts in Control Room Handswitch.Contacts,Restrictor Valves & Solenoid Pilot Valves Replaced (← links)
- 05000317/LER-1996-003, :on 960423,discovered Holes in Containment Sump Screen Larger than Described in Ufsar.Holes Most Likely Installed During Plant Const.Sump Screens Visually Inspected & Repaired (← links)
- 05000317/LER-1996-002, :on 960410,required Fire Watch Missed.Caused by Lack of Fire Watch Ownership.Circumstances of Event Will Be Reviewed W/Appropriate Groups (← links)
- 05000317/LER-1985-001-01, :on 850116,reactor Shut Down.Caused by Excessive Inleakage Into Two HPCI Safety Injection Tanks.Two Outlet Check Valves Overhauled (← links)
- 05000317/LER-1984-012, :on 840922 & 23,main Vent Particulate Monitor Out of Svc During Waste Gas Decay Tank Release.Caused by Inoperable Paper Drive & Personnel Error.Operators Instructed (← links)
- 05000317/LER-1985-001, :on 850116,leakage Discovered in Two Safety Injection Tank Check Valves Necessitating Reactor Shutdown. Caused by Degraded O Rings.O Rings to Be Replaced & Tech Specs Changed (← links)
- 05000317/LER-1992-006, :on 920623,noticed That Valve Found in Alert Range Not Placed in Supplemental Test Program for Monthly Testing.Caused by Personnel Error.New Set of Administrative Procedures Scheduled for Implementation (← links)
- 05000317/LER-1992-003-01, :on 920521,MSIV Pipe Tunnel Fire Damper Found Inoperable Due to Surveillance Test Procedure Omission. Inoperable Fire Damper Repaired.Findings Re Inoperable Spring Latch Will Be Reported in Rept Suppl (← links)
- 05000317/LER-1984-015, :on 841120,reactor Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of 8 of 12 Traveling Water Screens W/Fish.Methods for Minimizing Fish Impingement Being Pursued (← links)
- 05000317/LER-1984-014, :on 841024,during Surveillance Testing on Battery 21,individual Cell Voltage for Cell 1 Below Tech Spec Limits.Caused Not Stated.Cell Replaced & Battery 21 Returned to Svc (← links)
- 05000317/LER-1985-002, :on 850205,reactor Tripped on Low Steam Generator Water Level Condition.Caused by Personnel Error. Event Reviewed & Training Will Be Revised If Necessary (← links)
- 05000317/LER-1984-008, :840808,battery 21 Declared Inoperable Due to Electrolyte Levels Above High Level Mark for 50% of Battery Cells.Caused by Expansion of Electrolyte During Equalize Charge.Test Procedure Changed (← links)
- 05000317/LER-1984-007, :on 840724,during Monthly Surveillance Test of ESF Actuation Sys,Power Lost on 4,160-volt Emergency Bus. Caused by Personnel Inadvertently Depressing Incorrect Test Button.Bus Reenergized.Button Relabeled (← links)
- 05000317/LER-1995-005-01, :on 951109,manual Reactor Trip Occurred Due to Increasing SG 11 Water Level.Caused by Failure of Digital Control Module FIC-1111.Controller Sent to Vendor for Troubleshooting & Root Cause Analysis (← links)
- 05000317/LER-1995-006, :on 951116,manual Reactor Trip Occurred Due to Loss of 12 SG Feed Pump.Caused Oil Losses Allowing Pressure to Drop Before Standby Pump Could Restore Pressure.Trip Mechanism & Thrust Cleaned & Adjusted (← links)
- 05000317/LER-1992-002-01, :on 920319,units 1 & 2 Shutdown Due to EDG Inoperability.Caused by Design Flaw.Loss of Coolant Incident & Shutdown Sequencers on Unit 1 Will Be Modified to Ensure Correct Sequencing of EDG Loads (← links)
- 05000317/LER-1992-001-01, :on 920229,fuel Moved Into Spent Fuel Pool While Ventilation Sys Out of Svc Due to Maint Order Process Problem.Caused by Lack of Understanding & Control Room Supervisor Error.Personnel Briefed (← links)
- 05000317/LER-1984-013, :on 841002,manual Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of Traveling Water Screens W/Sea Nettles.Evaluation of Alternative Screens Pursued (← links)
- 05000317/LER-1984-009, :on 840828,manual Trip Occurred.Caused by Loss of Circulating Water Due to Clogging of Four Traveling Water Screens W/Fish.Evaluation of Methods for Minimizing Clogging of Screens Underway (← links)
- 05000317/LER-1984-011, :on 840830,surveillance Test Procedure on Diesel Generators 11 & 12 Not Performed Per Tech Spec Requirements.Caused by Personnel Error.Test Procedure Will Be Revised to Clarify Required Testing (← links)
- 05000317/LER-1984-010, :on 840829,quarterly Surveillance Testing of 125 Volt Dc Batteries Found Not Performed.Batteries Declared Inoperable.Caused by Personnel Error.Test Scheduling Sys Being Developed (← links)
- 05000317/LER-1984-005, :on 840502,through-wall Hole Occurred During Removal of Graphite Layer on Component Cooling HX 22.Second Hole Created on 840503.All Units 1 & 2 Saltwater Pumps Inoperable on 840514.Cause Unknown (← links)
- 05000317/LER-1984-006, :on 840531,axial Power Distribution Pretrip Alarm Occurred on Channel a of Reactor Protection Sys.Caused by Disconnected Signal Lead from Upper Detector.Procedure Changes & Review of Event Will Be Accomplished (← links)
- 05000317/LER-1995-004-01, :on 950816,inoperable Fire Barrier Penetration Seal Was Discovered.Caused by Inadequate Engineering Oversight & Less than Adequate Surveillance Procedure.Sealed Penetration Seal (← links)
- 05000317/LER-1995-003-01, :on 950730 & 31,entered TS 3.0.3 Due to High Bay Water Temps.Administration Limit for Bay Water Temp Raised & Current Unit 1 & Unit 2 SW Tube Type HXs Will Be Replaced (← links)
- 05000317/LER-1991-008-01, :on 911229,inadvertent Auxiliary Feedwater Actuation Sys Actuation Occurred.Caused by Sensitivity of Start Logic Circuit Design to Induced Noise Pulses.Mod to Logic Design Initiated (← links)
- 05000317/LER-1991-007-01, :on 911224,containment Integrity Breached When Emergency Air Lock Inner & Outer Doors Opened at Once. Caused by Slipped Chain & Misaligned Cam in Interlock Mechanism.Chain & Cam Realigned (← links)
- 05000317/LER-1981-058-03, Emergency Diesel Generator 12 to 4 Kv Bus 21 out-of-svc.Caused by Stuck Auxiliary Contact in Emergency Diesel Generator 12 Output Breaker to 4 Kv Bus 14.Switch Replaced (← links)
- 05000317/LER-1984-002, :on 840127,reactor Tripped & All Eight Reactor Trip Breakers Opened Simultaneously.Root Cause Unknown. Independent Sys Failure Evaluation Will Be Performed (← links)
- 05000317/LER-1984-003-01, :on 840123,technicians Violated Tech Specs by Opening Containment Isolation Valves 1-SV-6540-G & 1-SV-6507-G During Operational Maint Check.New Procedure Written & Tech Spec Amend Submitted (← links)
- 05000317/LER-1981-032-03, Reactor Protective Sys Channel D Hi Power Thermal Margin/Low Pressure & Axial Shape Index Trip Units Bypassed for Maint.Caused by Oscillator Noise in Transmitter (← links)
- 05000317/LER-1991-009, :on 911126,plant Entered LCO 3.0.3 When All HPSI Trains Became Inoperable & Pump Breaker Failed to Align for Starting.Caused by Mispositioned Fiber Spacer.Breaker Replaced W/Suitable Replacement (← links)
- 05000317/LER-1983-077-04, /04T-0:on 831231,oyster Samples Collected During Dec 1983 from Camp Canoy Indicated Ag-110 Above ETS Limits. Caused by Natural Tendency of Oysters to Bioconcentrate Environ Silver (← links)
- 05000317/LER-1995-002-01, :on 950616,manual Trip Occurred Due to Loss of 12 SG Feed Pump.Repaired Overspeed Trip Mechanism & Restarted Unit 1 (← links)
- 05000317/LER-1983-070-03, /03L-0:on 831202,pressurizer Level Decreased to 130 Inches.On 831210 Pressurizer Level Decreased to 128 Inches.Rcs Temp Swing of 10 Degrees Not Uncommon During Normal Startup Operations (← links)
- 05000317/LER-1983-054-03, /03L-0:on 830928,during Normal Operation,Th Input to Reactor Protection Sys Trip Channel C Failed in Nonconservative Direction.Caused by Failure of Th Temp Transmitter Due to Defective Transistor (← links)
- 05000317/LER-1983-055-03, /03L-0:on 831001,three Main Steam Safety Valves Did Not Lift at Required Setpoint.Cause Not Stated.Valves to Be Disassembled,Inspected & Repaired During Refueling Outage (← links)
- 05000317/LER-1983-056-03, /03L-0:on 831007,heat Damaged Snubber Discovered on Piping Between Pressurizer & Code Safety Valve.Caused by Lack of Oil in Reservoir on Snubber.Modified Reservoir Design Implemented.Update Expected (← links)
- 05000317/LER-1995-007, :on 940719,Unit 1 Tripped from 100% Power as Result of RPS Actuation.Caused by Low SG Water Levels Due to Level Shrink.Actions Initiated to Facilitate Safe Unit Restart (← links)
- 05000317/LER-1983-020-03, /03L-0:on 830423,weld Leak Found in Sealing Sys for 11A Reactor Coolant Pump Located in Heat Affected Zone of Weld Joining.Caused by vibration-induced Fatigue.Pipe Replaced & Flanges Eliminated (← links)
- 05000317/LER-1981-024-03, During Routine Shutdown, MSIV 12 Closing Time Exceeded Tech Spec Limit.Caused by Nonsteel Ring Binding Stem.Ring Replaced.Purchase Spec Revised (← links)
- 05000317/LER-1981-044-03, During Routine Shutdown, MSIV 12 Would Not Shut within Required Time Limit.Caused by Nonsteel Ring Binding Stem.Ring Replaced.Purchase Spec Revised (← links)
- 05000317/LER-1983-045-03, Containment Atmospheric Gaseous & Particulate Radiation Monitors Discharge Solenoid Valve Found Damaged & Venting Portion of Flow to Auxiliary Bldg.Cause Unknown.Valve Replaced (← links)
- 05000317/LER-1995-001-01, :on 950415,Unit 1 Entered TS 3.0.3 When EDG Supplying Backup Power Became Inoperable.Caused by Leaking Fuel Injector Pump Due to Improper Drainage.Drain Lines Cleaned (← links)
- 05000317/LER-1983-063-03, /03L-0:on 831130,while Starting Up,Safety Injection Tank 11B Found Inoperable Due to Level Transmitter Being Out of Calibr.Caused by Erroneous Removal of Static Pressure Offset Adjustment (← links)
- 05000317/LER-1983-066-03, /03L-0:on 831201,during Surveillance Test Procedure,Excessive Leak Rate Past Containment Personnel Air Lock Inner Door Discovered.Caused by Degraded Gasket.Gasket & Groove Cleaned & Lubricated (← links)
- 05000317/LER-1983-068-04, /04T-0:on 831031,oyster Samples Collected During Oct 1983 Showed Ag-110m to Be 70 +/-8 Pci/Kg.Caused by Natural Tendency of Oysters to Bioconcentrate Environ Silver (← links)
- 05000317/LER-1983-062-03, /03L-0:on 831129,post-accident Monitoring Instrumentation Channel X Found Inoperable.Caused by Leaking Variable Leg Drain Valve on Pressurizer Level Transmitter. Bonnet & Plug Assembly Replaced (← links)
- 05000317/LER-1983-032-03, Containment Isolation Signal Logic Module B Would Not Actuate.Caused by Defective Electronic Logic Components.Module Replaced,Tested & Returned to Svc (← links)
- 05000317/LER-1983-065-03, /03L-0:on 831128,during RCS Heatup,Inadvertent Safety Injection Actuation Occurred.On 831130,two Pressurizer Pressure Transmitters Out of Calibr.Caused by Failure to Meet Thermal Effect Specs (← links)
- 05000317/LER-1983-035-03, ESF Actuation Sys Channel Zg Steam Generator Level Found Tripped.Caused by Failure of Two Monsanto Mctz Optoisolators.All Optoisolators in Module Replaced W/Improved Design (← links)
- 05000317/LER-1982-002-03, Feeder Breaker 152-2101 Tripped Open,Causing Power Loss to 21 4-kV Bus.Caused by Failed Isolation Valve Applying False Hidden Trip Signal. Module Retrofitted w/MCT2 Optoisolator (← links)
- 05000317/LER-1991-006-01, :on 910724,reactor Protection Sys Channel B, Trip Unit 1 Taken Out of Bypass W/O Declaring Channel Operable or Placing Channel in Tripped Condition.Caused by Personnel Error.Shift Supervisor Counseled (← links)
- 05000317/LER-1991-005-01, :on 910730,determined That Circuitry for Smoke Detectors in Purge Air Supply Room Not Tested Every 6 Months.Caused by Personnel Error & Inadequate Technical Review.Detectors Tested & Procedure Corrected (← links)
- 05000317/LER-1983-061-03, /03L-0:on 831012,shutdown Cooling (SDC) Return Isolation Valves Shut,Terminating Sdc.Caused by High Pressure Signal Due to Inadequate tag-out of Electrical Signals from Pressurizer Transmitters (← links)
- 05000317/LER-1983-057-03, /03L-0:on 831010,leak Discovered on Downstream Side of Instrument Stop Valve 1-SI-1324.Caused by Cracked Weld.Stop Valve Adapter & Affected Tubing Will Be Removed & New Adapter Installed (← links)
- 05000317/LER-1983-058-03, /03L-0:on 831004 & 12,discovered That 12 Solid Radwaste Pumps Could Not Be Stopped from Control Room to Open Contact on Local Control Switch.Caused by High Resistance Across Handswitch Contacts 3 & 4 (← links)
- 05000317/LER-1981-022-03, ESF Actuation Sys Degraded Voltage Relay 127/B-11-H Found Inoperable.Caused by Relay Output Contact Binding.Relay Repaired (← links)
- 05000317/LER-1983-059-03, /03L-0:on 831011,chemical Vol Control Sys Chemical Isolation Signal for Channel Zf Discovered Inoperable. Caused by Room Pressure Transmitter Out of Calibr. Transmitter Recalibr (← links)
- 05000317/LER-1983-060-03, /03L-0:on 831005,fire Door Between Emergency Diesel Generator Rooms 11 & 12 Removed for Mod.Caused by Need to Facilitate Maint.Door Enlarged to Preclude Future Removal (← links)
- 05000317/LER-1983-052-04, /04T-0:on 830810,oyster Samples Collected During Aug 1983 Showed Higher than Background Ag-110m Activity. Caused by Natural Tendency of Oysters to Bioconcentrate Environ Silver (← links)
- 05000317/LER-1983-051-03, /03L-0:on 830927,diesel Generator 12 Found Inoperable on Two Occasions.Caused by Speed Switch 810 RPM Contact Stuck in Closed Position.Speed Switch Replaced. Switches on Other Generators Will Be Checked (← links)
- 05000317/LER-1984-001, :on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified (← links)
- 05000317/LER-1983-074-03, /03L-0:on 831213,flow Lost in Saltwater Subsystem. Caused by Operator Failure to Verify Proper Operation of 4 Kv Manual Disconnect.Standing Instruction Issued (← links)
- 05000317/LER-1983-043-01, Reed Switch Position Indication Lost for All Control Element Assemblies (Cea). Caused by Short in CEA 32 Reed Stack Position Transmitter. Transmitter Replaced (← links)
- 05000317/LER-1983-036-01, Reed Switch Position Indication Lost for All Control Element Assemblies (Cea). Caused by Short on CEA 56 Reed Stack Position Transmitter. Transmitter Replaced (← links)
- 05000317/LER-1983-026-03, Erratic Metrascope Indication for Control Element Assembly 18 & Metrascope Associated Alarms Identified Failed Reed Switch Position Stack.Cause Undetermined.Repairs Made (← links)
- 05000317/LER-1983-078-03, /03L-0:on 831229,pressurizer Level Decreased Below 133 Inches Three Times.Rcs Temp Swings of 10 F Not Uncommon During Normal Startup Operations.Pressurizer Level Program Will Be Changed to Prevent Recurrence (← links)
- 05000317/LER-1983-076-03, /03L-0:on 831230,auxiliary Feedwater Pump 13 Outboard Pump Bearing Drain Found Plugged W/Metal Filings, Indicating Bearing Damage.Caused by Obstruction in Bearing Housing Oil Return Passage.Obstruction Removed (← links)
- 05000317/LER-1983-072-01, /01T-0:on 831222,reactor Protection Sys Channels a & C for Reactor Coolant Flow Inoperable.Caused by Erratic Indication & Procedure Inadequacy.Transmitter Repaired & New Flow Setpoint Inserted (← links)
- 05000317/LER-1983-091-01, ECCS Pump Room Exhaust Ventilation Sys Charcoal Filter Inlet Damper Would Not Open When Bypass Damper Shut.Caused by Incorrect Connection of Charcoal Filter Damper Actuators (← links)
- 05000317/LER-1983-069-03, /03L-0:on 831221,during Test of Reactor Trip Circuit Breaker (Tcb) Undervoltage (UV) Devices,Response Time of Tcb 2 & 6 UV Trip Devices Found Too Slow.Caused by Setpoint Drift.Uv Devices Replaced (← links)
- 05000317/LER-1983-075-03, /03L-0:on 831227,discovered Reactor Protection Sys Channel D for High Power & Thermal Margin/Low Pressure (Tm/Lp) Inoperable.Caused by Foreign Matl on Tm/Lp Power Supply Leads.Leads & Terminations Cleaned (← links)
- 05000317/LER-1983-016-03, /03L-0:on 830328,during Transfer of Resin from Miscellaneous Waste Ion Exchanger to Solid Waste,Hole Developed in Sight Glass for Resin Transfer Line.Caused by Attempt to Open Resin Clog.Piping Mods Developed (← links)
- 05000317/LER-1983-067-03, /03L-0:on 831204,during Preventative Maint on ECCS Pump Room Air Cooler 12,saltwater Inlet Control Valve 1-CV-5173 Would Not Open.Caused by Worn & Damaged Mechanical Linkage.Actuator Repaired (← links)
- 05000317/LER-1982-086-04, /04X-0:on 821118 & 1214,oyster Samples Showed Ag-110m W/Higher than Background Activity.Caused by Natural Tendency of Oysters to Bioconcentrate Environ Silver. Releases within ETS Limits (← links)
- 05000317/LER-1983-071-03, /03L-0:on 831210,pressurizer Pressure Decreased to 2,180 Psia.Pressure Switch in Stator Liquid Cooling Sys Failed,Causing Turbine Runback.Caused by Loose Screw Holding Switch Actuator to Bourdon Tube.Screw Replaced (← links)
- 05000317/LER-1983-073-03, /03L-0:on 831216,excessive Leak Rate Past Containment Personnel Air Lock Outer Door Discovered.Caused by Degradation of Gaskets & Misalignment of Door.New Gaskets Installed & Door Closure Mechanism Adjusted (← links)
- 05000317/LER-1983-005-03, /03L-0:on 830106,during Startup Operations, Pressurizer Level Deviated Slightly from Program Level by More than Plus/Minus 5%.Caused by Loading of Main Turbine Generator.Rcs Temp Swings of 10 Degrees Not Uncommon (← links)
- 05000317/LER-1991-003-01, :on 911001,unit Tripped from 93% Power Due to Low Steam Generator Water Levels.Caused by Loose Fuse in Power Supply to Feedwater Regulating Valve 12 & Bent Fuse Clip.Fuse Holder Replaced & Personnel Trained (← links)
- 05000317/LER-1983-050-03, /03L-0:on 830912,during Normal Operation,Hydrogen Analyzer 12 Found Inoperable.Caused by Out of Adjustment Reagent Gas Flow Controller.Controller Readjusted. Surveillance Procedures Revised (← links)
- 05000317/LER-1994-008, :on 940915,technician Installed Test Equipment & Opened Slide Links for Wrong Instrument Channels,Causing Two Channels of RPS to Be Unavailable for About 15 Seconds. Personnel Involved in Event Counseled (← links)
- 05000317/LER-1980-038-03, Control Room Air Conditioning Compressor 12 Tripped & Would Not Restart.On 800801 Compressor Tripped on Overcurrent.Caused by Amps Higher than Specs.Load Demand Adjusted (← links)
- 05000317/LER-1980-051-01, Control Room Air Conditioning Units 11 & 12 Failed During post-maint Testing. Temp Did Not Exceed Design Limit.Cause Not Stated. Unipressure Valves Replaced on hot-gas Bypass (← links)
- 05000317/LER-1980-049-03, Control Room Air Conditioning Unit 12 Tripped & Would Not Restart.Caused by High Discharge Pressure.Unipressure Valves Adjusted.Valves Replaced W/Hot Gas Bypass Valves (← links)
- 05000317/LER-1980-034-01, Control Room Air Conditioning Unit 11 Tripped Off.Unit 12 Immediately Started But Tripped.Caused by High Discharge Pressure.Unipressure Valves Adjusted (← links)
- 05000317/LER-1980-039-03, Control Room Air Conditioning Compressor 12 Tripped.Unit Tripped Again on 800817.Caused by High Discharge Pressure.Unipressure Valves Adjusted (← links)
- 05000317/LER-1983-048-04, /04X-0:on 830614,oyster Samples Collected During Second Quarter 1983 Showed Higher than Background Activity for Ag-110M.Caused by Natural Tendency of Oysters to Bioconcentrate Environ Silver (← links)
- 05000317/LER-1983-042-03, /03L-0:on 830729,auxiliary Feedwater Flow Indicator to Steam Generator 11 Found Reading Incorrectly. Caused by Zero Ref Shifting Low on Flow Transmitter 1-FT-4509.Transmitter Recalibr (← links)
- 05000317/LER-1991-004-01, :on 900407,operations Functional Surveillance Test Coordinator Discovered Missed Surveillance.Caused by Scheduling Error.Procedural Controls Implemented Requiring Surveillance Program Manager Review & Approval (← links)
- 05000317/LER-1983-021-01, /01T-0:on 830429,to Address Concerns of IE Bulletin 80-04,steam Line Break Event Reanalyzed Assuming Failed Open Main Feed Reg Valve.Operating Procedures Modified to Require Manual Feed Sys Trip (← links)
- 05000317/LER-1983-038-03, /03L-0:on 830707,while Conducting Preventive Maint on Auxiliary Feedwater Pump 12,water Found in Outboard Bearing Housing.Caused by Leaking Outboard Pump Packing Gland.Pump Repacked (← links)
- 05000317/LER-1983-033-03, /03L-0:on 830630,routine Chemical Analysis Revealed Boric Acid Concentration in Boric Acid Storage Tanks 11 & 12 Exceeded 8% Limit.Caused by Insufficient Recirculation.Longer Recirculation Started (← links)
- 05000317/LER-1991-002-01, :on 910419,EDG Slow Start Times Allowed Due to Procedure Inadequacy.Surveillance Test Procedures O-8C & O-8-O Revised & Review of All TS Surveillance Requirements for Technical Adequacy Underway (← links)
- 05000317/LER-1980-046-03, Containment RMS Pump Failed,Resulting in Loss of Containment Gaseous & Particulate Radiation Monitors.Caused by Corrosion & Subsequent Vane Wear/Failure Due to Humidity (← links)
- 05000317/LER-1983-039-03, /03L-0:on 830722,during Normal Operation,Control Room Air Conditioner (Crac) 12 Compressor Tripped,Rendering Crac 12 Inoperable.Caused by Loose Condenser Fan Belts Tripping Compressor on High Discharge Pressure (← links)
- 05000317/LER-1983-041-01, /01T-0:on 830803,ECCS Pump Room Exhaust Ventilation Sys Charcoal Filter Inlet Damper Failed to Open When Damper Shut.Caused by Incorrect Damper Operators Mounting.Operators Will Be Remounted (← links)
- 05000317/LER-1983-023-03, /03L-0:on 830419,containment Pump (CS) Alarm Would Not Clear,Rendering Sump Inoperable Per Tech Spec 3.4.6.1. Sump Drained Until Alarm Cleared.Cause Not Determined (← links)
- 05000317/LER-1983-015-03, /03L-0:on 830415,plant Computer Failed,Rendering in-core Detector Monitoring Sys Inoperable.Caused by out-of- Step Selection of Multiple Analog Inputs to Analog Control Board,Resulting in Blown Power Fuse (← links)
- 05000317/LER-1983-019-01, /01T-0:on 830426,PORV ERV-404 Opened While Raising RCS Pressure.Caused by Failure of Control Room Operator to Monitor RCS Pressure Carefully.Short Circuit Caused Loss of Control Power to ERV-402 During Troubleshooting (← links)
- 05000317/LER-1983-013-03, /03L-0:on 830307,hydrogen Analyzer O-AE-6519 Found to Be Out of Svc.Caused by Inadvertent Depletion of Purge Gas (Oxygen) Cylinder.Operations Logs Change Rept Initiated to Monitor Cylinder Tank Pressure (← links)
- 05000317/LER-1981-083-03, Relief Valve on Waste Evaporator Condensate Recovery Tank Lifted.Caused by Gas Analyzer Components Exposed to Moisture.Analyzer Cabinets Redesigned & Environmentally Qualified (← links)
- 05000317/LER-1983-031-03, /03L-0:on 830604,T Hot Signal to Channel a Reactor Protection Sys Failed Low.Caused by Broken 120-volt Ac Input Lead to Temp Channel Power Supply.Longer Lead Installed (← links)
- 05000317/LER-1994-007, :on 940719,unit 1 Tripped from 100% Power Due to RPS Actuation.Failed Servo Amplifier Demodulator Indicator Board in Turbine EHC Cabinet Replaced & Component Level Checks Performed (← links)
- 05000317/LER-1983-028-01, /01T-0:on 830527 Discovered That Both ECCS Pump Room Air Coolers Out of Svc from 830524-25.Caused by Failure to Realize Potential Safety Significance of Coolers Prior to Isolation for Maint (← links)
- 05000317/LER-1983-011-03, /03L-0:on 830212,during Mode 1,refueling Water Tank Level Decreased Below Tech Specs Limit.Caused by Failure of Operating Instruction to Require Shutting of Spent Fuel Pool Pump 11 Suction.Instruction Corrected (← links)
- 05000317/LER-1979-031-01, During Followup Testing on Efs Actuation Sys Undervoltage Logic Circuit A,15-volt Dc Power Supplies to Undervoltage Logic a & B Would Not Respond When Signaled (← links)
- 05000317/LER-1982-071-01, Charging Pump 12 Breaker Would Not Close,Rendering Pump Inoperable.Caused by Dirty Breaker Charging Motor Cutoff Switch Contacts Resulting in Long Coil Charging Time.Burnt Coil Replaced (← links)
- 05000317/LER-1982-062-03, /03L-0:on 820927,pressurizer Level Deviated from Program Level & Pressurizer Level Controller Found in Local Setpoint Mode.Caused by Operator Error.Procedure Changed (← links)
- 05000317/LER-1994-004, :on 940221,discovered Excessive Corrosion of Incore Instrumentation Flange Components Due to Presence of Wet Boric Acid.Boric Acid Corrosion Insp Program Will Be Revised (← links)
- 05000317/LER-1981-078-03, Diesel Generator 12 Removed from Svc.Caused by Two Cylinder Injectors & Water Jacket Relief Developing Leaks.Injectors Replaced.Relief Reinstalled W/New O Ring (← links)
- 05000317/LER-1982-013-03, /03L-0:on 820316,w/charging Pump 12 Out of Svc Awaiting Maint,Discharge Relief Valve of Charging Pump 13 Lifted & Remained Open,Rendering Pump Inoperable.Caused by Relief Valve Setpoint Drift.Test Will Be Conducted (← links)
- 05000317/LER-1982-012-03, /03L-0:on 820316,during Normal Operation,Capacity of Charging Pumps Was Below Min Required by Tech Specs. Caused by Deterioration of Bladders in Storage.Charging Pump 11 Vented & Returned to Svc (← links)
- 05000317/LER-1982-011-03, /03L-0:on 820321,control Element Assembly 21 Dropped Into Core.Cause Not Determined.Electrical Test Results Forwarded to NSSS Supplier.Monthly Surveillance Test Procedure Being Revised (← links)
- 05000317/LER-1982-003-03, /03L-0:on 820126,during Surveillance Testing,Cell 29 of 125 volt-dc Battery 12 Indicated 0.04 Volt Below Min. Cause Unknown.Facility Change 82-11 Implemented (← links)
- 05000317/LER-1982-005-03, /03L-0:on 820129,during Normal Operation,Control Room Air Conditioning Unit 12 Tripped.Caused by Shorted Red Indication Lamp Socket (Rowan 2084-EPRI-L120) on Control Room Air Conditioning Supply Fan Motor Breaker (← links)
- 05000317/LER-1983-006-03, /03L-0:on 830127,during Normal Operation,Intake Structure Door IS-1 Found Open.Door Left Open Following Painting.Caused by Personnel Error in Not Following Posted Instructions.Personnel Counseled (← links)
- 05000317/LER-1983-010-03, /03L-0:on 830127,boric Acid Storage Tank 11 Rendered Inoperable Due to High Boron Concentration.Caused by Inadequate Procedures.Procedures Modified & Chemistry Technicians Informed (← links)
- 05000317/LER-1983-003-03, /03L-0:on 830120,low Individual Cell Voltage Discovered in One Cell of 125-volt Battery 22 During Surveillance Testing.Cause Not Determined.Battery Placed on Equalize Charge & Will Be Monitored Until Stabilized (← links)
- 05000317/LER-1982-081-03, /03L-0:on 821227,snubber 1-83-53 Found Inoperable. Caused by Low Oil Reservoir Due to Leakage at rod-end Cylinder Seal.Snubber Replaced (← links)
- 05000317/LER-1982-076-03, /03L-0:on 821219,during Performance of Routine Test,Containment Air Cooler Fan 12 Would Not Shift to Low Speed or Manually Start in Slow Speed.Caused by Relay Contacts Not Making Proper Contact.Relay Will Be Replaced (← links)
- 05000317/LER-1982-079-03, /03L-0:on 821209,due to Loading of Main Turbine Generator & on 821229,during Normal Shutdown Operation, Pressurizer Level Deviated from Program Band.Rcs Temp Swing Not Uncommon During Shutdown Operations (← links)
- 05000317/LER-1982-067-03, /03L-0:on 821109,safety Injection Tank High Level Alarm Annunciated Despite Indicated Level within Tech Spec Limits.Caused by Level Transmitter 1-LT-341 Being Out of Calibr.Transmitter to Be Replaced During Next Cold Shutdow (← links)
- 05000317/LER-1982-073-03, /03L-0:on 821110,pressurizer Level Deviated from Program Level by More than +/-5% Several Times.Caused by Loading of Main Turbine Generator.Reanalysis for Justification of Relaxation of Tech Specs in Progress (← links)
- 05000317/LER-1981-034-03, /03L-0:on 810508,emergency Diesel Generator 11 Failed to Reach Rated Speed While Returning Generator to Svc.Caused by Fuel Racks & Operating Linkages Sticking & Damaged Set Screw Rubbing Against Linkage (← links)
- 05000317/LER-1982-070-01, /01T-0:on 821118,chemical Vol & Control Isolation Signal (Cvcis) Sys Declared Inoperable Since Generation of Cvcis May Be Prohibited by Single Failure.Cause Not Stated. Corrective Action Ongoing to Verify Sys Design Adequacy (← links)
- 05000317/LER-1982-072-04, /04X-0:on 821027,higher than Normal Background Radioactive Ag-110m Levels Found in Oyster Samples Taken from Camp Canoy Location on 821123.Caused by Natural Tendency of Oysters to Concentrate Environ Silver (← links)
- 05000317/LER-1982-052-03, /03L-0:on 820913 & 20,emergency Diesel Generator 11 Failed to Achieve Required Rpm within 10-s.Caused by Loose Connector on Speed Switch O-SS-4848.Connector Tightened & lock-wired (← links)
- 05000317/LER-1980-041-01, 5 Minutes After Svc,Water Head Tanks Went from Normal Operating Level to Full,Isophase Bus Duct Cooling Low Flow Alarm Received.Caused by Air Compressor Failure Due to Cracked After Cooler Tubes (← links)
- 05000317/LER-1982-055-03, /03L-0:on 820820,increased RCS Leakage in 12B Reactor Coolant Pump Upper Seal Pressure Sensing Line Flexible Tubing Discovered.Cause Undetermined.Tubing Repaired (← links)
- 05000317/LER-1994-005, :on 940424,experienced Partial Loss of Offsite Power.Caused by 13.8 Kv Voltage Regulator Fault.Voltage Regulator 1102 Replaced (← links)
- 05000317/LER-1982-068-03, /03L-0:on 821109,during Mode 1,power Lost to 120- Volt Ac Vital Bus.Caused by Inadvertent Opening of Dc Input Breaker to Inverter Supplying Bus.Mod Will Be Performed to Inverter Cabinets to Prevent Inadvertent Breaker Openin (← links)
- 05000317/LER-1982-071-03, /03L-0:on 821109,during Reactor Trip Recovery, Charging Pump 12 Breaker Would Not Close.Caused by Dirty Breaker Charging Motor Cutoff Switch Contacts.Coil Replaced & Cutoff Switch Contacts Cleaned (← links)
- 05000317/LER-1982-065-03, /03L-0:on 821025,electrical Bus Supplying Power to Containment Atmosphere Particulate & Gaseous Radioactivity Monitoring Sys de-energized.Caused by Ground on Tendon Insp Platform Power Cable,Induced by High Winds (← links)
- 05000317/LER-1988-015, :on 881230,heavy Load (Spent Fuel Cask Crane Load Block) Moved Over Spent Fuel Pool.Caused by Personnel Error.Controlling Procedures to Ensure Safe Movement of Heavy Loads Over Spent Fuel Pool Revised (← links)
- 05000317/LER-1990-018, :on 900529,power Ratio Calculation Inoperable. Caused by Improper Labeling of Detector Connections.Detector Connections Corrected (← links)
- 05000317/LER-1982-063-03, /03L-0:on 821014,spent Fuel Pool Charcoal Filter Bypass Damper Discovered Open & Would Not Close,Rendering Sys Inoperable.Caused by Mechanical Binding of Damper Piston Rod.Periodic Lubrication Will Be Performed (← links)
- 05000317/LER-1982-064-03, /03L-0:on 821014,during Surveillance Testing, Refueling Water Tank Inadvertently Drained to Spent Fuel Pool to Level of 455 Inches.Caused by Missed Step During Performance of Surveillance Test.Operator Reinstructed (← links)
- 05000317/LER-1982-058-03, /03L-0:on 821019,ESF Actuation Sys Sensor Channel Ze for Steam Generator 11 Pressure Failed in Tripped Condition.Caused by Voltage Drift in Transmation 230IT Isolator.Isolator Replaced (← links)
- 05000317/LER-1989-016, :on 890908,determined That Resistance Temp Detectors Installed in Hot & Cold Legs of RCS Not Properly Sealed to Prevent Moisture Intrusion.Caused by Inadequate Procedure.Design Manual Revised (← links)
- 05000317/LER-1990-030-01, :on 901204,cracks Found in Structural Weld at coulping-to-vent Line Junction During Insp of Nitrogen Vent Lines on Top of Tanks 11B & 12B.Caused by Personnel Error.Relief Valves Relocated (← links)
- 05000317/LER-1990-030, :on 901204,cracks Found in Safety Injection Tank Nitrogen Vent Line Welds.Caused by Design Engineering Personnel error.CCI-126 Will Be Revised to Clarify Walkdown Requirements (← links)
- 05000317/LER-1982-059-03, /03L-0:on 821007,reactor Protective Sys Channel D Trip Units for High Power,Thermal Margin/Low Pressure & Axial Shape Index Bypassed for Corrective Maint.Caused by Shorted Indicator Lamp.Lamp Replaced (← links)
- 05000317/LER-1990-027, :on 901206,discovered That Undersized Fuses Could Prevent safety-related Equipment from Performing Intended Safety Function.Caused by Calculational Error in Design Package.Calculation Revised (← links)
- 05000317/LER-1982-060-04, /04X-0:on 820827,oyster Samples Showed Higher than Normal Concentration of Ag-110m.Caused by Natural Tendency of Oysters to Concentrate Environ Silver.All Releases in First Half of 1982 within Tech Spec Allowable Limits (← links)
- 05000317/LER-1981-025-03, /03L-0:on 810404,outer Personnel Air Lock Door Operating Mechanism Failed,Preventing Door from Closing. Caused by Broken Cam Follower in Door Operator Due to Clutch Malfunction.Insp & Maint of Clutches Added to Procedure (← links)
- 05000317/LER-1981-029-03, /03L-0:on 810401,during Normal Operation, Discovered That Several Supports in Solid Radwaste Subsystem Did Not Meet Interim Acceptance Criteria of IE Bulletin 79-14.Supports Redesigned,Modified & Replaced (← links)
- 05000317/LER-1982-061-03, /03X-0:on 820926,pressurizer Level Deviated from Program Level During Normal Startup.Rcs Temp Swings of 10 Degrees Not Uncommon During Startup.Justification for Tech Spec Relaxation Reanalyzed (← links)
- 05000317/LER-1982-057-03, /03L-0:on 820927,channel a Th Read 11 Degrees Low. Caused by Increased Resistance in Temp Detector 1-TE-112HA Possibly Due to Loose Connection in Containment.Input Removed from Channel a RPS (← links)
- 05000317/LER-1989-023, :on 891220,design Deficiency Noted Which Could Result in Unavailability of Both safety-related Svc Water Subsystems.Caused by Design Deficiency.Leak Rate Monitoring Increased (← links)
- 05000317/LER-1981-035-03, /03L-0:on 810506,one Cell of 125-volt Dc Vent Duct Chase Battery 12 Found Below Tech Spec Min.Cause Unknown. Cell Disconnected & Will Be Replaced (← links)
- 05000317/LER-1994-003, :on 940321,noticed Leakage from Rcs.Caused by Pwscc.Corrective Action:Sleeve Location B-3 & FF-1 Have Been Plugged W/Alloy 690 Plug Welded to Outer Diameter of Pzr Lower Head (← links)
- 05000317/LER-1990-028, :on 901008,neither Train of Control Room Ventilation Operable Due to Operator Error (← links)
- 05000317/LER-1990-029, :on 901024,discovered That TS 3.8.1.1, Electrical Power Sys,Ac Sources Not Performed within Required 8 H Periodicity.Caused by Personnel Error (← links)
- 05000317/LER-1982-053-03, /03X-1:on 820910,hydrogen Analyzer O-AE-6519 Adjusted Out of Calibr During Initial Training Exercise, Rendering Unit Inoperable.Caused by Erroneous Adjustment Step in Chemistry Procedure.Procedure Revised (← links)
- 05000317/LER-1990-026, :on 900824,discovered That Two Excore Nuclear Instrumentation Detector Cells Tilted 6 F (← links)
- 05000317/LER-1982-051-03, /03L-0:on 820827,plant Air Header Isolation Valve Inside containment,1-PA-1040,found Open.Caused by Valve Being Inadvertently Left Open While Securing Plant Air to Containment on 820822.Standing Instruction Issued (← links)
- 05000317/LER-1990-025, :on 900911,power Lost to Sample Pump for Gaseous Effluent Monitoring.Caused by Inadequate Design & Personnel Error.Power Promptly Restored to Sampling Equipment from Designated Receptacle (← links)
- 05000317/LER-1983-007-03, /03L-0:on 830107,ECCS Pump Room Fan 11 Discharge Damper Discovered Only Partially Open.Cause Unknown.Damper & Similar ECCS Pump Room Ventilation Dampers Locked Open (← links)
- 05000317/LER-1982-045-03, /03L-0:on 820805,control Element Assembly 33 Dropped to Bottom of Core.Caused by Erratic Upper Gripper Latch Action.High Voltage to Magnetic Jack Upper Gripper Coil Increased.Assembly Satisfactorily Retested (← links)
- 05000317/LER-1982-043-03, /03L-0:on 820802,ECCS Pump Room Fan 12 Removed from Svc Due to High Noise & Vibration.Caused by Reduced Shaft Diameter Inside Inner Race of Roller Bearing.New Shaft Machined & Installed (← links)
- 05000317/LER-1994-002, :on 940224,EDG Load Sequencer Timer Not Consistently Tested in Modes 5 & 6.Caused by Misunderstood Applicability.Ts Amended to Delete Unnecessary Test.W/ (← links)
- 05000317/LER-1982-046-03, /03L-0:on 820729,channel a Reactor Protective Sys Axial Shape Index Indication Discovered Out of Calibr.Caused by Improper Coefficient Setting Description & Value in Setpoint File.File Revised & Channels Verified in Spec (← links)
- 05000317/LER-1982-047-03, /03L-0:on 820730,during Surveillance Testing, Channel C Reactor Protective Sys Low Flow Trip Setpoint Was Nonconservative.Caused by Improper Setting of Trip Units. Setpoint Corrected (← links)
- 05000317/LER-1982-044-03, /03L-0:on 820729,reactor Protective Sys Channel a Axial Shape Index Setpoint Out of Spec in Nonconservative Direction.Caused by High,Erratic Output of Comparator Module (Bell & Howell 19-501-2).Module Replaced (← links)
- 05000317/LER-1982-069-03, /03L-0:on 821129,during Surveillance Testing, Auxiliary Feedwater Pump Turbine 11 Journal Bearing Temp Rapidly Increased to 214 F.Caused by Improperly Marked Oil Level Gauge Glass Allowing Low Oil Level.Gauge Remarked (← links)
- 05000317/LER-1982-074-03, /03L-0:on 821127,during Normal Operation,Water Leak Discovered from Cracked Weld on Charging Pump 11 Discharge Drain Line.Caused by Thin Crack in Heat Affected Zone of Socket Weld Due to Vibration.Weld Repaired (← links)
- 05000317/LER-1982-054-03, /03L-0:on 820831,12 Auxiliary Feedwater Pump Governor Linkage Vibrated Loose,Rendering Pump Inoperable. Caused by Loose Nut Connecting Governor Lever to Connecting Rod Backed Off Pin Causing Pin to Come Out.Pin Reinserted (← links)
- 05000317/LER-1982-048-03, /03L-0:on 820813,channel B Wide Range Nuclear Instrument Indicated Erratically During Normal Shutdown Operations.Caused by Loosely Attached Drawer/High Voltage Cable Connector.Connector Tightened (← links)
- 05000317/LER-1982-050-03, /03L-0:on 820805,17,21,22 & 23,pressure Level Deviated from Program Level During Startup & Shutdown Operations.Rcs Temp Swings by 10 Degrees Not Uncommon. Reanalysis for Relaxation of Tech Spec in Progress (← links)
- 05000317/LER-1981-016-03, /03L-0:on 810317,during Normal Power Operation, Loss of Power Experienced to Motor Operated Main Feedwater Isolation Valve 2-MOV-4517.Caused by Inadvertent Trip of Breaker Ground Sensing Device (← links)
- 05000317/LER-1981-038-04, /04T-0:on 810526,Apr 1981 Bay Water Tritium Sample Concentration Measured 10 Times Higher than Background.Effluent Limits Not Exceeded,Therefore Corrective Action Not Necessary (← links)
- 05000317/LER-1981-028-04, /04T-0:on 810423,drain Valve for Waste Neutralizing Tank 11 Discovered Open.Caused by Failure of Operators to Follow Procedures.Involved Operators Disciplined (← links)
- 05000317/LER-1982-040-01, /01T-0:on 820805,pressurizer Pressure Transmitters for Four Safety Channels Removed from Svc for Recalibr. Caused by Suspected Failure of Barton Transmitter,Model 763 to Meet Thermal Effect Spec (← links)
- 05000317/LER-1981-026-01, /01T-0:on 810527,acoustic Flow Indicator for Pressurizer Safety Valve 1-RV-201 Found Inoperable.Caused by Work in Progress Resulting in Heavy Object Resting on & Severing steel-sheathed Cable.Repair Completed on 810530 (← links)
- 05000317/LER-1981-039-03, /03L-0:on 810606,during Preventive Maint Test, Control Element Assembly 21 Dropped Into Core.Power Reduced to 70% & Assembly Withdrawn.Electrical Test Disclosed No Cause for Event.Test Results Forwarded to Supplier (← links)
- 05000317/LER-1981-040-03, /03L-0:on 810601,during Normal Startup,Pressurizer Level Deviated from Program Level by More than 5% During Changes in RCS Temp.Caused by Normal Startup Operations (← links)
- 05000317/LER-1981-014-03, /03L-0:on 810227,diesel Generator 12 Started Automatically.Generator Stop & Start Failure Alarm Received.Caused by Insufficient Contact Wipe Provided by Diesel Start Switch (← links)
- 05000317/LER-1981-015-03, /03L-0:on 810226,shift Supervisor Informed That Sample Pump for Control Room Radiation Monitor Was Out of Svc,Rendering Auto Recirculation of Control Room Inoperable on High Radiation.Caused by Pump Seizure (← links)
- 05000317/LER-1982-041-03, /03L-0:on 820713,channel a High Power,Thermal Margin/Low Pressure & Axial Shape Index Trip Units Bypassed to Allow Failing Hot Leg Temp Element Signal to Be Removed from Reactor Protective Sys.Caused by Changing Temp Element (← links)
- 05000317/LER-1980-052-03, /03L-0:on 800917,during Normal operation,12 Saltwater/Svc Water Heat Exchanger Was Taken Out of Svc to Investigate & Repair Tube Leak.Tube Was Found & Plugged (← links)
- 05000317/LER-1980-037-01, /01T-0:on 800730,plant Notified by Engineering Dept That Instrument Tubing Connecting Emergency Diesel Generator Air Start Headers to Pressure Switches Were Not Seismically Qualified.Caused by Original Installation Mod (← links)
- 05000317/LER-1982-038-03, /03L-0:on 820706,following Loss of Steam Generator Feed Pump 11,pressurizer Level Deviated from Program Level by Greater than 5%.Caused by Increasing Steam Generator Level Too Quickly,Resulting in RCS Temp Decrease (← links)
- 05000317/LER-1978-054-01, /01x-0 on 781213:reactor Was Made Critical w/11 Component Cooling Heat Exchanger Out of Svc & 11 Saltwater sub-sys Partially Drained.Caused by Personnel Error (← links)
- 05000317/LER-1978-053-03, /03L-0 on 781113:during Normal Oper the Containment Particulate Radioactivity Monitor Failed Low at 1110.Caused by Disconnection of Signal Cable to Monitor. Cable Connected & Monitor Returned to Svc (← links)
- 05000317/LER-1978-053, Forwards LER 78-053/03L-0 (← links)
- 05000317/LER-1982-034-03, /03L-0:on 820609 & 0702,snubbers in Main Steam Sys Not Periodically Tested Per Surveillance Test Program. Caused by Discrepancy Between Q List & Piping Stress Analysis.Snubbers Upgraded & Tested (← links)
- 05000317/LER-1978-051-03, /03L-0 on 781031:solenoid Valve 1-SV-4043 for Main Steam Isolation Valve Hydraulic Accumulators Was Leaking Due to Failure of 1 of 4 O Ring Seals.Cause of Ring Failure Unknown.All 4 Seals Replaced & Valve Returned to Svc (← links)
- 05000317/LER-1978-051, Forwards LER 78-051/03L-0 (← links)
- 05000317/LER-1978-052-03, /03L-0 on 781103:in Routine Surveillance test,11 Auxiliary Feed Pump Was Tripped Per Procedure & Oper Was Unable to Reset Throttle Valve Due to Binding.Assembly Was Freed Upon Lubrication of Stem & Nut (← links)
- 05000317/LER-1978-052, Forwards LER 78-052/03L-0 (← links)
- 05000317/LER-1978-049-03, /03L-0 on 781020:pump for Radiat Monitors Seized, Perhaps Due to Graphite Particles from Pump Being Deposited in Bearings.A Normal End of Life Failure.Code Pump Model 6 (← links)
- 05000317/LER-1978-049, Forwards LER 78-049/03L-0 (← links)
- 05000317/LER-1981-073-03, Unidentified RCS Leakage Increased to 1.23 Gpm.Caused by Loose Valve Packing.Valve Repacked (← links)
- 05000317/LER-1982-021-03, Main Steam Safety Valve RV-3993 Did Not Lift at Required Setpoint.No Cause Stated. Valve Reset & Retested (← links)
- 05000317/LER-1978-048-03, /03L-0:on 781017,while Moving Group 5 Control Element Assemblies (Cea),Cea 36 Dropped from full-out Position.Caused by Spike in 15-volt Power Supply.Mod to Improve Sys Reliability Under Review (← links)
- 05000317/LER-1978-044-03, /03L-0:on 780923,during post-maint Test on Spent Fuel Pool 12,exhaust Flow Rate Found Less than Required by Tech Specs.Caused by Discharge Damper Leakage (← links)
- 05000317/LER-1978-047-03, /03L-0:on 781010,13 Kv Breaker 252-2104 Tripped open,de-energizing 12 Kv Svc Bus 21.Caused by Signal of Unknown Source (← links)
- 05000317/LER-1990-024, :on 900803,discovered That Surveillance Test Procedure Not Performed on Smoke Detection Sys.Caused by Inadequate Controls.Review of Administrative & Procedural Controls Being Conducted (← links)
- 05000317/LER-1993-008, :on 931203,determined Removal of EDG Room Shield Door Could Render Other EDGs Inoperable.Caused by Lack of Procedural Controls.Maint Procedure Will Be Generated W/Appropriate Precautions (← links)
- 05000317/LER-1993-007-01, :on 931229,performance Test Indicated Possibility of SRW Heat Exchanger Inoperability.Caused by Original Design Calculations Assuming Min SRW Flow Was Not Limiting Case.Hxs Determined Operable (← links)
- 05000317/LER-1993-007, :on 931229,performance Test Indicated Possibilityof SRW HX Inoperability.Caused by Original Design Calculations Assuming Min SRW Flow Was Most Limiting Case. Procedures Revised (← links)
- 05000317/LER-1990-014, :on 900414,Delta T Power Channels Declared Inoperable.Caused by Inadequate Written Procedure & Personnel Error.Changes to Operating Procedures to Provide Addl Guidance to Operators Approved (← links)
- 05000317/LER-1990-022, :on 900504,errors & Nonconservatisms Found in Calculations of Low Temp Overpressure Protection Controls. Caused by Insufficient Investigation & Documentation of Assumptions.Calculational Methods Reevaluated (← links)
- 05000317/LER-1990-021, :on 900710,discovered Cables Supporting Operation of Both Emergency Diesel Generators 11 & 12 Routed Through Electrical Equipment Room.Design Change Issued to Be Implemented Prior to Restart of Unit (← links)
- 05000317/LER-1982-037-03, /03L-0:on 820701,pressurizer Level Deviated Slightly from Program Level by More than Plus/Minus 5% & Pressurizer Pressure Decreased Below 2,225 Psia to Changes in RCS Temp Necessitated by Startup Tests (← links)
- 05000317/LER-1982-030-03, /03L-0:on 820629,while in Mode 3,auxiliary Feedwater Flow Indication to Steam Generator 11 Indicated 350 Gpm W/No Flow in Line.Caused by Installation of Pressure Sensing Line Snubbers.Snubbers Removed (← links)
- 05000317/LER-1982-031-03, /03L-0:on 820702,auxiliary Feedwater Flow Indication to Steam Generator 11 Indicated 100 Gpm W/No Flow in Line.Caused by Bent Flexture Wire in Flow Transmitter 1-FT-4509.Transmitter Replaced (← links)
- 05000317/LER-1982-039-03, /03L-0:on 820701,safety Injection Tank 11B Level Transmitter 1-LT-321 Found Out of Calibr.Caused by Zero Shift.Transmitter Replaced & Recalibr (← links)
- 05000317/LER-1993-006, :on 931010,surveillance on Electrical Fire Pump Missed Due to Personnel Error.Pump Declared Inoperable & Missed Surveillance Performed (← links)
- 05000317/LER-1989-025, :on 891211,Tech Spec Violation - Missed Fire Watch Tour Occurred Due to Personnel Error (← links)
- 05000317/LER-1982-036-03, /03L-0:on 820701,during Startup Physics Testing, Control Element Assembly (CEA) 55 Dropped Into Core.Cea Was Withdrawn & Aligned W/Remainder of Group 5 Ceas.Cause Not Determined.No Recurrence of Event Identified (← links)
- 05000317/LER-1982-032-03, /03L-0:on 820629,motor Operated Isolation Valve in Salt Water Sys Supply to Circulating Water Pump Room Air Coolers Inoperable Electrically & Would Not Respond Properly to Sias.Caused by Tripped Thermal Overloads (← links)
- 05000317/LER-1982-029-01, /01T-0:on 820628,during Mode 3,automatic Start Feature for Auxiliary Feed Pumps 11 & 12 Inhibited.Caused by Procedural Inadequacy Due to Handswitches for MSIV in pull-to-lock Position.Procedure Modified (← links)
- 05000317/LER-1982-027-03, /03L-0:on 820602,while in Mode 5 W/Emergency Diesel Generator 11 & Svc Transformer P-13000-2 Inoperable Due to Maint,Emergency Diesel Generator 12 Tripped.Caused by Operator Adjusting Voltage (← links)
- 05000317/LER-1982-026-03, /03L-0:on 820517,during Mode 6 Operation,Loss of Shutdown Cooling Flow Experienced When Operating Low Pressure Safety Injection Pump 11 Breaker Opened.Cause Undetermined.Motor Supply Breaker Alignment Check Performed (← links)
- 05000317/LER-1981-056-01, Power Operated Relief Valve Declared Inoperable.Valve Opened on Erroneous High Pressure Signal Caused by Bumping Pressurizer Transmitter. Configuration of Transmitter Modified (← links)
- 05000317/LER-1982-010-03, /03L-0:on 820319,computer Failed Causing Loss of CEA Pulse Counting Sys & Incore Detection Sys.Caused by Defective Analog Multiplexer Card 1AM1.Card Replaced (← links)
- 05000317/LER-1982-009-03, /03L-0:on 820314,reactor Protection Sys Channel B Hi Power Thermal Margin/Low Pressure & Axial Shape Index Trip Units Bypassed Due to Th Input Failing Low.Caused by Failed Temp Transmitter 1-TT-112HB.Transmitter Replaced (← links)
- 05000317/LER-1982-024-03, /03L-0:on 820417,during Main Turbine Overspeed & Valve Tightness Testing,Pressurizer Level Deviated Excessively from Program Level.Caused by RCS Temp Swings During Main Turbine Testing (← links)
- 05000317/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000317/LER-1982-022-01, /01T-0:on 820503,determined That All Operations Above 200 F from 801218-820418 Were Performed W/Total Type B&C Penetration Leakage Greater than 0.60 La.Caused by Error in Surveillance Test Procedure.Procedure Revised (← links)
- 05000317/LER-1982-020-03, /03L-0:on 820417,following Reactor Shutdown,Sample of RCS Indicated Iodine Dose Equivalent Value Exceeding Limits.Caused by Iodine Spike from Fuel Due to Depressurization Shock from Shutdown (← links)
- 05000317/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000317/LER-1982-019-01, /01T-0:on 820415,hydrogen Sampling Manual Stop Valves Were Discovered Shut Rendering Hydrogen Analyzer Inoperable.Caused by Incomplete Operating Instructions & Tagging Procedure.Valves Opened & Tags Attached (← links)
- 05000317/LER-1982-019, Forwards LER 82-019/01T-0 (← links)
- 05000317/LER-1982-016-03, /03L-0:on 820401,charcoal Bypass Damper Would Not Shut Completely,Rendering ECCS Exhaust Filter Train Inoperable.Caused by Solenoid Valve 1-SV-5408A Leaking Through.Valve Cleaned & Lubricated (← links)
- 05000317/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000317/LER-1982-015-03, /03L-0:on 820407,during Normal Operation,While Performing Maint on Pressure Transmitter 102C,pressurizer Level Exceeded Tech Specs.Caused by Personnel Failure to Realize Commonality of Ref Legs (← links)
- 05000317/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000317/LER-1982-017-03, /03L-0:on 820322,control Room Air Conditioning Unit 12 Failed to Start.Caused by Supply Air Pressure for Thermostat Being Set at 12 Rather than 20 Psig.Pressure Adjusted & Unit Returned to Svc (← links)
- 05000317/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000317/LER-1982-014-03, /03L-0:on 820407,reactor Protective Sys,Channel C Pressurizer Pressure & Thermal Margin/Low Pressure Trip Units Bypassed After Channel C Pressure Indication Deviated High.Caused by Zero Ref Drift.Instrument Recalibr (← links)
- 05000317/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000317/LER-1982-018-03, /03L-0:on 820406,during Normal Operation,Eccs Pump Room Exhaust Fan 12 Removed from Svc to Replace Suspected Shaft Bearing.Caused by Worn Bearing Race.Fan Bearings Replaced (← links)
- 05000317/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000317/LER-1982-008-03, /03L-0:on 820303,during Power Operation,While Restoring Component Cooling Lineup to Normal,Component Cooling HX 11 Discovered Isolated for 13-h.Caused by Failure to Log HX Inlet Valves in Locked Valve Deviation Log (← links)
- 05000317/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000317/LER-1982-007-03, /03L-0:on 820218 & 21,auxiliary Feedwater Flow Indication of Steam Generator 12 Indicated 70 Gpm W/No Flow in Line.Caused by Shifting of Transmitter Zero Adjustment. Transmitter Recalibr (← links)
- 05000317/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000317/LER-1993-005, :on 930630,TS 3.0.3 Entered Due to Both Containment Spray Sys Inoperable.Replaced CCW Outlet Valve Actuator Connecting Link Assembly from Number 11 SDC Heat Exchanger (← links)
- 05000317/LER-1989-023-02, Revises Initial Assumption Identified in LER 89-023-02 Re Postulated Rupture in nonsafety-related Svc Water Sys Which Could Cause Failure of Both safety-related Subsystems.Turbine Bldg Piping Will Now Withstand SSE (← links)
- 05000317/LER-1993-004, :on 930611,reactor Tripped Due to Turbine Trip Resulting from Inadequate Procedure.Procedure Changes Made to Open Appropriate FW Heater High Level Dump Valves During Plant Startup (← links)
- 05000317/LER-1993-003, :on 930610,dual Unit Trip Occurred Due to Partial Loss of Offsite Power.Flashover Protection Relay for Breaker 552-61 Replaced & Training for Personnel W/ Access to Relays Will Be Reinforced (← links)
- 05000317/LER-1993-002, :on 930205,software Vendor Discovered Error in User Manual for Updating Basss data-input Library.Caused by Failure of QA Procedures to Require Independent Review of User Manuals.Manual Surveillances Performed (← links)
- 05000317/LER-1987-002-01, :on 861203,section of Thin Wall Found on Main Steam Line W/Readings Below Allowable Min of 0.95 Inches. Caused by Grinding of Edge of Pipe to Achieve Proper fit-up for Welding.Relief from IWB-3610 Granted (← links)
- 05000317/LER-1990-017, :on 900505,pin Hole Leak Observed in Discharge Piping of Saltwater Pump 13.Caused by Localized Corrosion. Leaking Spool Piece Removed & Blank Flange Installed (← links)
- 05000317/LER-1990-016, :on 900421,determined That Waste Gas Decay Tank (Wgdt) 13 Discharged Instead of (Wgdt) 11 for Discharge Permit Issued.Caused by Inadequate Communications.Training Performed for Operators Re Event (← links)
- 05000317/LER-1990-013, :on 900413,determined That Axial Shape Index Channels Out of Spec & Inoperable.Caused by Inadequate Understanding of Design Basis for Excore/Incore Comparison. Design Basis for Excore/Incore Improved (← links)
- 05000317/LER-1990-015, :on 900407,discovered That Relay Contact Which Actuates Reactor Trip Breaker Shunt Trip Not Adequately Functionally Tested.Caused by Failure to Examine Circuit in Detail When Test Developed (← links)
- 05000317/LER-1990-012, :on 900406,identified That Procedure for LOCA Would Not Ensure post-LOCA Core Flush Would Be Initiated in Time to Prevent Boron Precipitation.Caused by Personnel Error.Configuration Mgt Program Strengthened (← links)
- 05000317/LER-1982-006-03, /03L-0:on 820215,containment Air Cooler Fan 13 Could Not Be Stopped or Shifted to Low Speed from Control Room.Cause Not Determined & No Maint Action Performed.Fan Returned to Svc (← links)
- 05000317/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000317/LER-1982-002, Forwards LER 82-002/03L-0 (← links)
- 05000317/LER-1982-004-04, /04T-0:on 820122,while Rinsing Down Anion Demineralizer W/Waste Neutralizing Tank Bypassed,Water Sample Exceeded ETS Limit.Caused by Inadequate Procedures & Failure to Sample Rinse Water Prior to Discharge (← links)
- 05000317/LER-1982-004, Forwards LER 82-004/04L-T (← links)
- 05000317/LER-1981-084-03, /03L-0:on 811215,plant Computer Failed Rendering Incore Detector Monitoring Sys Inoperable.Caused by Failure of Typewriter Drive Sys During Entry of Program Instructions.Typewriter Replaced & Necessary Info Reloaded (← links)
- 05000317/LER-1981-084, Forwards LER 81-084/03L-0 (← links)
- 05000317/LER-1981-085-03, /03L-0:on 811216 & 22,Channel B Axial Shape Index Lower Setpoint Failed.Cause Not Determined,Since Setpoint Returned to Normal Before Troubleshooting Isolated Cause (← links)
- 05000317/LER-1981-085, Forwards LER 81-085/03L-0 (← links)
- 05000317/LER-1981-082-03, /03L-0:on 811209,during Normal Operation,Plant Computer Failed,Rendering Incore Detector Monitoring Sys Inoperable.Caused by Memory Track Failure on Rapid Access Disk.Spare Track Selected & Memory Reloaded (← links)
- 05000317/LER-1981-082, Forwards LER 81-082/03L-0 (← links)
- 05000317/LER-1981-018-03, Smoke Began to Issue from Exhaust Manifold Insulation During Routine Test of Diesel Generator 11.Caused by Residual Oil Leakage from Manifold. Manifold & Gaskets Replaced & Operating Procedures Changed (← links)
- 05000317/LER-1981-018, Forwards Updated LER 81-018/03X-1 (← links)
- 05000317/LER-1981-080, Forwards LER 81-080/03L-0 (← links)
- 05000317/LER-1981-063-01, Component Cooling Heat Exchanger 12 Saltwater Outlet Valve 1-CV-5163 Would Not Open.Caused by Corrosion of Valve Operator.Operator Overhauled & Filled W/Rust Inhibiting Grease (← links)
- 05000317/LER-1981-063, Forwards Updated LER 81-063/01X-1 (← links)
- 05000317/LER-1981-081-03, /03L-0:on 811102,primary Control Element Assembly Position Indication Lights & Analog Sys Were Malfunctioning. Cause Undetermined.Sys Reinitialized.Selected Computer Data Outputs & Assembly Limit Indications Checked (← links)
- 05000317/LER-1981-081, Forwards LER 81-081/03L-0 (← links)
- 05000317/LER-1981-074-01, Determined That Component Cooling Isolation Valve to Containment CC-3832-CV Would Fail in Unconservative Position on Loss of Instrument Air. Administrative Controls Revised (← links)
- 05000317/LER-1981-074, Forwards Updated LER 81-074/01X-1 (← links)
- 05000317/LER-1993-001, :on 930202,both CR Air Conditioning Trains Declared Inoperable & Plant Entered TS 3.0.3.Caused by Insufficient Sys Refrigerant Inventory.Procedures for Maint Will Be Revised Re Weight of Refrigerant (← links)
- 05000317/LER-1988-003, :on 881209,incorrect Steam Generator Tube Plugged.Caused by Failure to Follow Procedures.Correct Tube Plugged & Improperly Plugged Tube Evaluated & Found Acceptable (← links)
- 05000317/LER-1990-011, :on 900330,PORV Found to Be Inoperable for Up to 19 Months.Caused by Insufficient Monitoring & Followup of Physical Problems W/Porvs.Procedure Requiring Periodic Insp of PORVs Will Be Initiated (← links)
- 05000317/LER-1990-010, :on 900304,improper Source Checks Performed on Liquid Radwaste & Waste Gas Discharge Monitors.Caused by Inadequate Procedures.Procedure Revised to Address Tech Spec Requirements (← links)
- 05000317/LER-1990-005, :on 900131,control Room Notified That HXs May Be Unable to Perform Safety Function at High Flow Rates. Caused by Design Error in Shutdown Cooling Hx.Flow Throttled to Reduce Noise.Also Reported Per Part 21 (← links)
- 05000317/LER-1981-004-01, Containment Cooler 8-inch SRW Discharge Valve Failed to Open.Apparently Caused by Low Differential Pressure Rating of Solenoid Valve That Would Not Vent to Allow Discharge Valve to Open (← links)
- 05000317/LER-1981-076-03, /03L-0:on 811021,hydrogen Analyzer Sample Pump Rendered Inoperable.Caused by defective,worn-out Bellows. Pump to Be Replaced (← links)
- 05000317/LER-1981-076, Forwards LER 81-076/03L-0 (← links)
- 05000317/LER-1981-079-01, /01T-0:on 811105,svc Water Pump Room Drain Lines to Turbine Bldg Found to Lack Back Flow Protection, Compromising Room Water Tight Integrity.Caused by Lack of Check Valve in Drain Lines from Svc Water Pump Room (← links)
- 05000317/LER-1981-079, Forwards LER 81-079/01T-0 (← links)
- 05000317/LER-1981-036-01, Placed Emergency Diesel Generator Out of Svc for Surveillance Testing & Discovered Upper Crankshaft Thrust Hearing Worn Excessively.Caused by Inadequate Diesel Prelube Prior to Starting (← links)
- 05000317/LER-1981-036, Forwards Updated LER 81-036/01X-1 (← links)
- 05000317/LER-1981-060-04, During Normal Operation, Noted Leakage Past Drain Valve for Waste Neutralizing Tank. Caused by Damaged Seat.Replaced Valve & Determined Lined Plug Valve Would Better Serve Purpose (← links)
- 05000317/LER-1981-060, Forwards Updated LER 81-060/04X-1 (← links)
- 05000317/LER-1981-071-01, During Normal Operation, Received Group 1 Control Element Primary Deviation Alarm. Caused by Electronic Failure of Individual Control Module. Module to Be Sent to Supplier for Analysis & Repair (← links)
- 05000317/LER-1981-071, Forwards Updated LER 81-071/01X-1 (← links)
- 05000317/LER-1981-077-03, /03L-0:on 811016,during Operation,Discovered 10 Solenoid Valves in Svc Water & Component Cooling Sys Rated for Less than Normal Pressure.Caused by Inadequate Design Review for Facility Change.Responsible Engineers Notified (← links)
- 05000317/LER-1981-077, Forwards LER 81-077/03L-0 (← links)
- 05000317/LER-1981-075-03, /03L-0:on 811010,during Main Turbine Control Valve Testing,Noted Reduced Steam Flow to Main Turbine Causing RCS Temp Swing & Pressurizer Level Excess.Caused by Testing in Load Limit Rather than Load Set Position (← links)
- 05000317/LER-1981-075, Forwards LER 81-075/03L-0 (← links)
- 05000317/LER-1981-073-01, /01T-0:on 811022,discovered That Component Cooling Isolation Valve Would Fail Open on Loss of Instrument Air. Valve Declared Inoperable.Caused by Request to Modify Valve Initiated in 1976 But Not Performed Until 811022 (← links)
- 05000317/LER-1981-071-03, /03L-0:on 811005,received Group One Control Element Primary Deviation Alarm.Caused by Electronic Failure of Control Element Assembly 57 Individual Control Module. Panel de-energized Pending Supplier Repair & Analysis (← links)
- 05000317/LER-1981-072-03, /03L-0:on 811001,discovered Low Output Signal Condition for 1-PDY-121D of RCS Loop 12 Flow Signal Characterizer.Instrument Returned to Manufacturer to Determine Cause of Failure (← links)
- 05000317/LER-1981-072, Forwards LER 81-072/03L-0 (← links)
- 05000317/LER-1981-070-03, /03L-0:on 810916,during Increase to Rated Power, Excessive Boric Acid Was Added to Rcs,Causing Slight Decrease in Temp & Power.Personnel Counseled to Prevent Reoccurrence (← links)
- 05000317/LER-1981-070, Forwards LER 81-070/03L-0 (← links)
- ML14280A522 (← links)
- ML14251A228 (← links)
- ML14153A562 (← links)
- ML14087A060 (← links)
- ML14080A308 (redirect page) (← links)
- ML13155A412 (← links)
- ML12320A314 (← links)
- ML122910955 (← links)
- 05000317/LER-2014-007, Regarding Reactor Coolant System Pressure Boundary Leakage in Reactor Coolant Pump Differential Pressure Transmitter Tubing (← links)
- 05000318/LER-2014-002, Diesel Generator Technical Specification Surveillance Requirement Missed Due to Human Performance Error (← links)
- 05000317/LER-2014-006, Regarding Reactor Trip Due to Reactor Protective System Matrix Relay Testing Pushbutton Failure (← links)
- 05000317/LER-2014-005, Regarding Condition Prohibited by Technical Specifications Due to Human Performance Error (← links)
- 05000317/LER-2014-004, Regarding Unfused 250 Vdc Circuits Result in 10 CFR Part 50 Appendix R Unanalyzed Condition Due to Original Design Did Not Adequately Address Fire Protection Requirements (← links)
- 05000317/LER-2014-003, Regarding Pressurizer Safety Valves As-Found Settings (Low) Outside Technical Specification Limits Due to Inadequate Lift Spring Performance (← links)
- 05000317/LER-2014-002, Regarding Condition Prohibited by Technical Specifications Due to Auxiliary Feedwater Train Inoperable Due to Human Performance Error (← links)
- 05000318/LER-2014-001, Regarding Reactor Trip Due to Inadequate Protection Against Weather Related Water Intrusion (← links)