Pages that link to "05000318/LER-1979-001, Forwards LER 79-001/03L-0"
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The following pages link to 05000318/LER-1979-001, Forwards LER 79-001/03L-0:
Displayed 50 items.
- ML19273A995 (redirect page) (← links)
- ML19273A996 (← links)
- 05000318/LER-1979-008, Forwards LER 79-008/03L-0 (← links)
- 05000318/LER-1979-049, Forwards LER 79-049/03L-0 (← links)
- 05000318/LER-1979-049-03, /03L-0:on 791221,during Steady State Operation, Channel B Thermocouple Taken Out of Svc Due to Erratic Indication.Caused by Broken Lead on Current Loop Resistor, Vishay Model S-106C.All Loop Connections Checked Quarterly (← 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)
- 05000318/LER-1979-039-01, /01X-0:on 791024,air Start Sys Hangers Were Not Built to Meet Seismic Requirements.Cause Not Stated.Air Line Is Being re-evaluated Re Support Requirements for Seismic Qualification (← 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)
- 05000318/LER-1979-008-03, /03L-0 on 790208:22B Safety Injection Tank Level & Pressure Were Below Tech Spec Min Due to Fill Valve Not Shutting Tightly After Being Opened for Drainage.Tank Refilled & Valve Successfully Cycled Several Times (← links)
- 05000318/LER-1979-004-03, /03L-0 on 790127:during Routine Startup of Auxiliary Feedpump,Throttle Valve Would Not Reset.Caused by Disengagement of Traveling Nut Thread During Operation of Valve (← links)
- 05000317/LER-1979-078-01, Has Been Cancelled (← links)
- 05000318/LER-1979-075, Has Been Cancelled (← links)
- 05000318/LER-1979-001, Forwards Updated LER 79-001/03X-1 (redirect page) (← links)
- ML19309F361 (redirect page) (← links)
- ML19309F362 (← links)
- ML19309F361 (redirect page) (← links)
- 05000318/LER-1979-001 (redirect page) (← links)
- 05000318/LER-2008-001 (← links)
- 05000318/LER-2001-002 (← links)
- 05000318/LER-2001-001 (← links)
- 05000318/LER-1982-028, Forwards LER 82-028/03L-0 (← links)
- 05000318/LER-1982-029, Forwards LER 82-029/03L-0 (← links)
- 05000318/LER-1982-026, Forwards LER 82-026/03L-0 (← links)
- 05000318/LER-1982-027, Forwards LER 82-027/03L-0 (← links)
- 05000318/LER-1982-025, Forwards LER 82-025/01T-0 (← links)
- 05000318/LER-1982-024, Forwards LER 82-024/03L-0 (← links)
- 05000318/LER-1982-022, Forwards LER 82-022/03L-0 (← links)
- 05000318/LER-1981-019, Forwards LER 81-019/03L-0 (← links)
- 05000318/LER-1981-017, Forwards LER 81-017/03L-0 (← links)
- 05000318/LER-1981-020, Forwards LER 81-020/03L-0 (← links)
- 05000318/LER-1981-021, Forwards LER 81-021/03L-0 (← links)
- 05000318/LER-1982-040, Forwards LER 82-040/03L-0 (← links)
- 05000318/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000318/LER-1983-001, Forwards LER 83-001/03L-0 (← links)
- 05000318/LER-1982-037, Forwards LER 82-037/03L-0 (← links)
- 05000318/LER-1982-054, Forwards LER 82-054/03L-0 (← links)
- 05000318/LER-1982-053, Forwards LER 82-053/03L-0 (← links)
- 05000318/LER-1982-039, Forwards LER 82-039/01T-0 (← links)
- 05000318/LER-1981-011, Forwards LER 81-011/03L-0 (← links)
- 05000318/LER-1982-036, Forwards LER 82-036/03L-0 (← links)
- 05000318/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000318/LER-1980-059, Forwards LER 80-059/03L-0 (← links)
- 05000318/LER-1980-041, Forwards LER 80-041/03L-0 (← links)
- 05000318/LER-1982-034, Forwards LER 82-034/01T-0 (← links)
- 05000318/LER-1979-008, Forwards LER 79-008/03L-0 (← links)
- 05000318/LER-1982-031, Forwards LER 82-031/03L-0 (← links)
- 05000318/LER-1978-035, Forwards LER 78-035/01T-0 (← links)
- 05000318/LER-1978-033, Forwards LER 78-033/03L-0 (← links)
- 05000318/LER-1982-035, Forwards LER 82-035/03L-0 (← links)
- 05000318/LER-1983-007, Followup LER 83-007/01T-0:on 830203,de-energization of Reactor Protection Sys (RPS) Channels Caused PORV & Pressurizer Quench Tank Rupture Disk to Open.Caused by Blown Fuse in RPS Channel a Due to Crossed Leads in Inverter 21 (← links)
- 05000318/LER-1983-006, Forwards LER 83-006/03L-0 (← links)
- 05000318/LER-1983-004, Forwards LER 83-004/03L-0 (← links)
- 05000318/LER-1982-044, Forwards LER 82-044/03L-0 (← links)
- 05000318/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000318/LER-1983-014, Forwards LER 83-014/03L-0 (← links)
- 05000318/LER-1983-013, Forwards LER 83-013/03L-0 (← links)
- 05000318/LER-1983-008, Forwards LER 83-008/03L-0 (← links)
- 05000318/LER-1982-049, Forwards LER 82-049/01T-0 (← links)
- 05000318/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000318/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000318/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000318/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000318/LER-1982-045, Forwards LER 82-045/03L-0 (← links)
- 05000318/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000318/LER-1983-009, Forwards LER 83-009/03L-0 (← links)
- 05000318/LER-1983-005, Forwards LER 83-005/03L-0 (← links)
- 05000318/LER-1982-012, Forwards Updated LER 82-012/03X-1 (← links)
- 05000318/LER-1982-008, Forwards Updated LER 82-008/03X-1 (← links)
- 05000318/LER-1978-049, Forwards LER 78-049/03L-0 (← links)
- 05000318/LER-1978-050, Forwards LER 78-050/03L-0 (← links)
- 05000318/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000318/LER-1983-015, Forwards LER 83-015/03L-0 (← links)
- 05000318/LER-1983-019, Forwards LER 83-019/03L-0 (← links)
- 05000318/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000318/LER-1983-016, Forwards LER 83-016/03L-0 (← links)
- 05000318/LER-1992-005, Submits Replacement Cover Ltr for LER 92-005 Dtd 920831. Initial Ltr Identified LER for Unit 2 Only (← links)
- 05000318/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000318/LER-1983-010, Forwards LER 83-010/03L-0 (← links)
- 05000318/LER-1983-012, Forwards LER 83-012/03L-0 (← links)
- 05000318/LER-1981-018, Forwards LER 81-018/03L-0 (← links)
- 05000318/LER-1982-015, Forwards LER 82-015/03L-0 (← links)
- 05000318/LER-1981-023, Forwards Updated LER 81-023/03X-1 (← links)
- 05000318/LER-1979-049, Forwards LER 79-049/03L-0 (← links)
- 05000318/LER-1980-014, Forwards LER 80-014/03L-0 (← links)
- 05000318/LER-1982-004, Forwards Updated LER 82-004/01X-1 (← links)
- 05000318/LER-1981-056, Forwards Updated LER 81-056/03X-1 (← links)
- 05000318/LER-2022-001, Forwards LER 2022-001-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Automatic Reactor Trip Due to High Reactor Coolant System Pressure (← links)
- 05000318/LER-1982-030, Forwards LER 82-030/01T-0 (← links)
- 05000318/LER-1980-011, Forwards Updated LER 80-011/01X-1 (← links)
- 05000318/LER-2023-003, Forward LER 2023-003-00 for Calvert Cliffs Nuclear Power Plant, Unit 2, Manual Actuation of Auxiliary Feedwater System Due to 22 Steam Generator Feedwater Pump Trip (← links)
- 05000318/LER-2024-002, Automatic Reactor Trip Due to Main Turbine Loss of Load (← links)
- 05000318/LER-2024-001, Manual Reactor Trip Due to 22 Steam Generator Feed Pump Trip (← links)
- 05000318/LER-2024-001-01, Manual Reactor Trip Due to 22 Steam Generator Feed Pump Trip (← links)
- 05000318/LER-2023-004-01, Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer (← links)
- 05000318/LER-2023-004, Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer (← links)
- 05000318/LER-2023-002, Automatic Reactor Trip from Reactor Protection System Actuation Due to Loss of Unit Service Transformer (← links)
- 05000318/LER-2023-001-01, Condition Prohibited by Technical Specifications Due to Inoperable Nuclear Instrumentation at Very Low Power (← links)
- 05000318/LER-2022-003, Pressurizer Safety Valve As-Found Settings (Low) Outside Technical Specification Limits Due to Setpoint Drift (← links)
- 05000318/LER-2022-002, Unplanned Safety Injection Actuation Signal Due to Human Error (← links)
- 05000318/LER-2021-004, Manual Reactor Trip Due to Lowering Steam Generator Levels (← links)
- 05000318/LER-2021-003, Auxiliary Feedwater Pump Inoperable Due to Improper Reset of Trip Throttle Valve (← links)
- 05000318/LER-2002-002, Manual Reactor Trip Due to Lowering Steam Generator Level Following Main Feedwater Regulating Valve Going Shut (← links)
- 05000318/LER-2021-001, Calvert Cliff Nuclear Power Plant Unit No. 2, Pressure Heater Sleeve Weld Pressure Boundary Leakage Caused by Primary Water Stress Corrosion Cracking (← links)
- 05000318/LER-1998-003-01, :on 980507,relays out-of-calibration Were Noted Due to Bumped Dial & Actions Not Taken.Caused by Improperly Installed Cover.Technicians Will Be Trained on Event & Protective Covers Will Be Clearly Marked (← links)
- 05000318/LER-1989-003, :on 890307,plant Shutdown Due to Air Leak on Feedwater Regulating Valve (Frv).Caused by Failure to Identify Need to Perform Adequate Preventive Maint on Positioner.Frv Controller Placed in Manual (← links)
- 05000318/LER-1989-007, :on 890505,evidence of Reactor Coolant Leakage from Unknown Number of Pressurizer Vessel Heater Penetrations & One Pressurizer Vessel Pressure/Level Penetration Noted.Cause Unknown (← links)
- 05000318/LER-1989-002-01, :on 890228,determined That Fire Barrier Penetration Inoperable.Caused by Inadequate Administrative Controls.Instructional Memo to Be Issued & Program to Be Initiated (← links)
- 05000318/LER-1989-009-01, :on 890522,fire Damper Found in Closed Position by Fire Protection Design Engineer.Caused by Failure of Damper Fusible Link.Link Replaced,Damper Opened & Damper Insp Procedure Improved & Clarified (← links)
- 05000318/LER-1989-010-01, :on 890623,determined That Tech Spec Surveillance 4.7.12a Not Performed within Required Time Interval.Caused by Procedural Problem.Overdue Surveillance Performed.Surveillance Procedure Revised (← links)
- 05000318/LER-1989-006, :on 890417 & 19,discovered Tech Spec Requirement for Containment Closure During Core Alterations Not Satisfied.Caused by Inadequate Administrative Control. Corrective Actions Listed (← links)
- 05000318/LER-1989-004-01, :on 890301,auxiliary Feedwater Pump Trip Circuitry Fire Occurred in Control Room.Caused by Incorrect Overspeed Trip Mechanism Adjustment on Actuator.Procedure Will Be Developed for Aligning Actuator (← links)
- 05000318/LER-1989-011-01, :on 890710,discovered Condition Which Could Have Prevented Fulfillment of Safety Function of Structures or Sys Needed to Mitigate Consequences of Accident.Caused by Nut Failure Due to Inadequate Matl Properties (← links)
- 05000318/LER-1989-005-01, :on 890323,discovered That Snubber Functional Test Procedure to Satisfy Tech Specs 4.7.8.1.c & D Not Adequate.Caused by Lack of Adequate Control for Procedures. Rev Proposed to Facility Instruction CCI-104 (← links)
- 05000318/LER-1989-008, :on 890327,surveillance Requirement to Perform Type B Local Leak Rate Test at Intervals No Greater than 24 Months Not Met.Caused by Maint Package Not Specifying That Test Had to Be Performed (← links)
- 05000318/LER-1987-008-01, :on 871122,control Element Assembly 29 Dropped Fully Into Reactor Core & (EIIS-AA-ROD) Would Not Raise Causing Manual Trip.Caused by Personnel Error.Electricians Involved Counseled & Module Replaced (← links)
- 05000318/LER-1998-005-01, :on 980725,initiated Plant Cooldown Due to RCS Pressure Boundary Leakage.Caused by Crack in Inconel Alloy 600-type Weld Filler Matl of Nozzle.Leaking Penetration Was Repaired from Outside of Pressurizer (← links)
- 05000318/LER-1998-004-01, :on 980723,manual Plant Trip Occurred Due to Moisture Separator Reheater Vent Line Rupture.Caused by Flow Accelerated Corrosion.Replaced Ruptured Pipe & Completed Insp of Other Small Bore high-energy Piping (← links)
- 05000318/LER-1987-007-01, :on 871012,unplanned Actuation of Auxiliary Feedwater Actuation Sys (Afas) Experienced.Caused by Simultaneous Deenergization of Two Afas Sensor Cabinets. New Labels Made to Inform of Cabinet Locations (← links)
- 05000318/LER-1987-005-01, :on 870703,reactor Tripped on Low Steam Generator Pressure.Cause Unknown.Simulator Calibr Will Be Checked in Near Future to Ensure Accuracy & Plots of Valve Voltages Double Checked as Normal (← links)
- 05000318/LER-1987-006-01, :on 870907,reactor Manually Tripped in Response to Rupture in electro-hydraulic Control Sys Hydraulic Fluid Tubing.Caused by Vibration Induced Metal Fatigue.Tubing Replaced & Addl Tubing Clamps Installed (← links)
- 05000318/LER-1998-002-01, :on 980305,failure of Handswitch Passive Contact to Close Occurred.Caused by Contacts in Lower Contact Block of Handswitch Did Not Close as Designed. Handswitch Replaced (← links)
- 05000318/LER-1986-007, :on 860912,reactor Manually Tripped Due to Partial Loss of Feedwater Flow to Steam Generator 21.Caused by Jumpering Across Two Terminals.Probes Rewired (← links)
- 05000318/LER-1987-004-01, :on 870507,leak Discovered in 0.5 Inch Diameter Inlet Piping to Relief Valve.Analysis Conducted to Determine Cause.Cracked Pipe Spool Replaced & Shutdown Cooling Loop 21 Returned to Svc (← links)
- 05000318/LER-1986-002, :on 860204,maint Turbine & Reactor Trip Occurred.Probably Caused by Inadvertent Actuation of Main Turbine Trip on High Steam Generator Level.Investigation of Root Cause in Progress (← links)
- 05000318/LER-1986-004, :on 860521 & 27,reactor Manually Tripped from 100% Power Due to Low Steam Generator Water Level. Caused by Erroneous Control Signal from Double Ground. Grounded Components Repaired (← links)
- 05000318/LER-1987-003-01, :on 870324,two Pin Hole Leaks Discovered in 1/2-inch Diameter Inlet Piping to Relief Valve 2-RV-439 in Shutdown Cooling/Lpsi Sys Header.Leaking Pipe Spool & Relief Valve Replaced (← links)
- 05000318/LER-1986-005, :on 860725,RCS Leakage Determined to Be Greater than 1 Gallon Per Min.Caused by Separated Compression Fitting from Flexible Metal Hose Installed on Reactor Coolant Pump Tubing.Hose Repaired (← links)
- 05000318/LER-1987-002-01, :on 870228,low Steam Generator Water Level Reactor Trip Occurred Due to Failed Rochester Instrument Sys,Inc Adjustable Overshoot Transmitter Lead/Lag Circuit. Cause Under Investigation.Unit Replaced (← links)
- 05000318/LER-1986-003, :on 860315,4 Kv Emergency Bus 21 Inadvertently Deenergized When Normal Feeder Breaker to Bus 21 Tripped, Causing Diesel Generator 12 to Start Automatically.Caused by Failed Logic Module in ESFAS Cabinet (← links)
- 05000318/LER-1998-001-01, :on 980113,unit 2B EDG Had Been Inoperable for 15 Days.Caused by Speed Switch Adapter Failure.Inspected/ Replaced Other Diesel Speed Switch Adapters to Ensure Spring Clips Are Not Degraded (← links)
- 05000318/LER-1988-004, :on 880427,steam Generator Feed Pump 21 Tripped on Low Water Level.Cause Suspected to Be Fault in Turbine Thrust Bearing Monitor Circuitry.Pump Will Be Monitored & Replacements for Monitor in Progress (← links)
- 05000318/LER-1986-001-01, :on 860115,out-of-tolerence Results for Pressurizer Pressure low-range Pressure Transmitters Identified.On 851020,out-of-tolerence Also Revealed (← links)
- 05000318/LER-1988-006, :on 880707,discovered That Scheduled Surveillance Test Procedure on Auxiliary Feedwater Actuation Sys Inadvertently Not Performed.Caused by Personnel Error. Personnel Instructed on Requirements (← links)
- 05000318/LER-1988-003, :on 880317,steam Generator Isolation Check Valve Failed.Caused by Normal Wear of Hinge Pins & Bushing Area in Conjunction W/Steam Erosion/Cutting of Disk Seating Surface.Valve Replaced (← links)
- 05000318/LER-1987-009-01, :on 871221,reactor Tripped Due to Loss of Load Signal.Caused by Failure of Main Generator Permanent Magnet Generator Due to Misaligned Stator frame.Turbine-generator Maint Procedure Upgraded (← links)
- 05000318/LER-1988-002, :on 880122,reactor Tripped Due to Reduced Feedwater Flow Due to Loss of Power to Instrument Bus 2Y10. Caused by Personnel Error.Event Reviewed W/All Electricians. Mfg Electrical Prints Clarified (← links)
- 05000318/LER-1988-005, :on 880606,emergency Diesel Generator Performance Found Unsatisfactory During Surveillance Test. Cause Not Stated.Operating Instructions Modified & Licensed Operators Counseled on Procedure Adherence (← links)
- 05000318/LER-1979-049-03, /03L-0:on 791221,during Steady State Operation, Channel B Thermocouple Taken Out of Svc Due to Erratic Indication.Caused by Broken Lead on Current Loop Resistor, Vishay Model S-106C.All Loop Connections Checked Quarterly (← links)
- 05000318/LER-1997-003, :on 970423,chemistry Sampling Was Not Performed as Required by TS 3.4.7 Due to Insufficient Consideration of Precise Wording of TS on Part of Chemistry Personnel.Ts Will Be Clarified When Improved TS Are Implemented (← links)
- 05000318/LER-1985-010, :on 851019,determined That Pressurizer Safety Valve 2-RC-201-RV Lift Setpoint Out of Spec.Cause Undetermined.Setpoint Reset.Setpoint Rechecked on 851201 & Found to Be within 2 Psi (← links)
- 05000318/LER-1997-002-01, :on 970405,containment Purge Valve Isolation Sys TS Violation Occurred.Caused by Inaccurate Implementation of TS 3.9.9.Personnel Air Lock Interlocks Restored (← links)
- 05000318/LER-1997-001-01, :on 970401,refueling Machine Overload Protective Circuitry Was Inoperable Due to Failure to Correctly Translate Refueling Machine Circuitry Design Into Ts.Mod to Overload Bypass Was Installed (← links)
- 05000318/LER-1985-013-01, :on 851111,operator Inadvertently Initiated Safety Injection Actuation & Steam Generator Isolation Signal While Energizing Esfas.Caused by Failure of Generator to Use Correct Section of Instruction (← links)
- 05000318/LER-1985-012-01, :on 851212,during Mode 1,reactor Tripped on Low Steam Generator Water Due to Loss of Steam Generator Feed Pump 21.Caused by Defective High Signal Selector.Selector Replaced (← links)
- 05000318/LER-1985-011-01, :on 851019,while in Mode 3 Shutdown, Surveillance Test Procedure Determined 11 of 16 Main Steam Safety Valve (MSSV) Setpoints Out of Spec.Valve Setpoints Reset & Hydroset Sent to Vendor (← links)
- 05000318/LER-1985-010-01, :on 851019,during Surveillance Test,Determined That Pressurizer Safety Valve 2-RC-201-RV Lift Setpoint Out of Spec.Setpoint Reset (← links)
- 05000318/LER-1985-009-01, :on 851015,svc Water Subsystem 21 Declared Inoperable.Caused by Partial Blockage of Saltwater Sys Flow Through Svc Water HX 21.HX Cleaned & Returned to Svc (← links)
- 05000318/LER-1985-008-01, :on 850724,MSIV Failed to Fully Close & Declared Inoperable.Caused by Oil Deficiency Due to Gas Bubble in Hydraulic Fluid Header & Addl Component Malfunctions.Suppressor Bladders Replaced (← links)
- 05000318/LER-1996-006, :on 961210,discovered EDG Had Been Inoperable for Six Days.Caused by Personnel Error.Checked Fuse Holder Covers,Conducted Tailgate Training & Revised Procedure Re Installation of Fuse Holder Covers (← links)
- 05000318/LER-1996-002, :on 960522,missed Fire Watch Occurred Due to Personnel Error.Root Cause Analysis Has Been Completed. Plant Mgt Reemphasized to Site Personnel Importance of & Requirements for Fire Watches (← links)
- 05000318/LER-1996-005, :on 961117,automatic Reactor Trip Occurred Due to Closure of Feedwater Regulating Valve.Magnetic Particle Examination Was Conducted on New,Replacement Spring Retainers.No Indications Were Found (← links)
- 05000318/LER-1985-007-01, :on 850626,main Vent Noble Gas Monitor Iodine & Particulate Samplers Declared Out of Svc Due to Surveillance Test Not Being Performed.Caused by Personnel Error.Site Procedures Revised (← links)
- 05000318/LER-1996-004-01, :on 960926,missed Surveillance Occurred Due to Less than Adequate Technical Review of Stp.Procedures Revised (← links)
- 05000318/LER-1985-001-02, :on 850423,manual Trip Occurred as Result of Degradation of Reactor Coolant Pump 21A Shaft Seal. Degradation Caused by Temp Fluctuations Resulting in Pressure Oscillations Between Stages of Seal (← links)
- 05000318/LER-1985-006-01, :on 850526,both Emergency Diesel Generators Declared Inoperable Due to Cracks in Interpolar Connections of Damper Windings on Rotor Poles of Generator.Interpolar Connections Removed (← links)
- 05000318/LER-1985-005, :on 850523,recirculation Actuation Signal Inadvertently Initiated.Caused by Technician Violating Procedure,Which Stipulates That Only One Channel Can Be Tested at Time.Technicians Counseled (← links)
- 05000318/LER-1985-003-01, :on 850518,incorrect Stud Matl & Cracked Studs Identified in Pressurizer Spray Valves & Bypass Valves. Problems Initially Identified on 850425 Following Reactor Trip.Studs Replaced W/Approved Matl (← links)
- 05000318/LER-1985-004-01, :on 850518,surveillance Testing Determined That Control Room post-loss of Coolant Incident Filter Sys Did Not Meet Limits for Flow Rate,Pressure Drop & Efficiency. Caused by Accumulation of Dust & Dirt (← links)
- 05000318/LER-1980-014-03, /03L-0:on 800219,during Surveillance Test,Channel a of Chemical & Vol Control Sys Isolation Logic Would Not Function W/Receipt of Trip Signal from Sensor Channel.Caused by Failure of Module Input Circuit (← links)
- 05000318/LER-1985-002-01, :on 850506,automatic Trip Occurred Due to Low Reactor Coolant Flow Condition Resulting from Loss of Reactor Coolant Pump 21A.Caused by Jarring of Auxiliary Cubicle Door Housing 251 Overcurrent Device (← links)
- 05000318/LER-1979-039-01, /01X-0:on 791024,air Start Sys Hangers Were Not Built to Meet Seismic Requirements.Cause Not Stated.Air Line Is Being re-evaluated Re Support Requirements for Seismic Qualification (← links)
- 05000318/LER-1992-006-01, :on 920817,reactor Tripped Due to Automatic Actuation of Rps.Possibly Caused by MSIV Hydraulic Problem or Mechanical Binding.Hydraulic Fluid Changed & Hydraulic Fluid Sample Valve Replaced (← links)
- 05000318/LER-1996-003-01, :on 960619,discovered Missed Fire Protection Compensatory Action.Caused by Personnel Error.Provided Awareness Training to Personnel Re Fire Protection Compensatory Actions Expectations (← links)
- 05000318/LER-1996-002-01, :on 960522,fire Watch Missed.Caused by Personnel Error.Counseled Personnel Re Event (← links)
- 05000318/LER-1984-008-01, :on 841003,automatic Trip Occurred Due to Steam Generator Feed Pump (SGFP) 22 Trip.Possibly Caused by Spurious Fault in Common SGFP Control Circuitry.Sgfp Control Oil & Lube Oil Sys Checked (← links)
- 05000318/LER-1992-007, :on 920929,Calvert Cliffs Unit 2 Manually Tripped Due to High Temps on Main Turbine Rear Thrust Bearing Faces.Caused by 23 Moisture Separator/Reheater Relief Valves Stuck Open.Valves Repaired (← links)
- 05000318/LER-1996-001-01, :on 960227,breakers 552-41,552-21 & 552-61 Tripped Open in Plant Switchyard.Caused by Failure of Auxiliary Relay Card in Breaker 552-41.Failed Relay Card Replaced (← links)
- 05000318/LER-1992-004-01, :on 920718,both Independent Saltwater Loops Declared Inoperable.Caused by Blown Fuse in Control Circuit. Blown Fuse Replaced,Temporary Guidance Issued & TS Equipment Maint Policy Will Be Developed (← links)
- 05000318/LER-1992-003-02, :on 920624,reactor Manually Tripped Due to Rapid Loss of Main Condenser Vacuum.Expansion Joint Belt in Main Condenser 21 Replaced W/Improved Design.Preventative Maint Procedure Will Also Be Implemented (← links)
- 05000318/LER-1984-007-01, :on 840824,PORV Override Handswitches Found in Override Position Rendering PORVs Inoperable.Caused by Procedural Inadequacy.Tech Specs Will Be Revised Re Operating Procedures (← links)
- 05000318/LER-1984-006-01, :on 840709,while in Mode 1,unidentified Reactor Coolant Leakage Determined Greater than 1.0 Gpm.Caused by Inservice Fatigue Induced Cracked Weld.Defective Section of Control Bleedoff Pipe Replaced (← links)
- 05000318/LER-1990-002, :on 901207,gaseous Effluent Monitoring Sampling Pump Inadvertently Denergized for Less than 1 H.Caused by Inadequate Design.Separate Circuit Breaker Provided for Pump (← links)
- 05000318/LER-1992-001, :on 920102,manual Trip Occurred Following Leak from Feedwater Heater Relief Valve.Caused by Faulty Tube Side Prv on 26B Feedwater Heater.Valve Replaced & Evaluation of Prvs Performed W/Avoidance Recommendations (← links)
- 05000318/LER-1981-053-03, /03X-1:on 811105,discharge Pressure on Saltwater Pump 22 Discovered High Due to Closure of Valve CV-5214, Resulting in Degraded Saltwater Flow.Caused by Key Slipping Out of Keyway to Valve Steam.Valve Removed (← links)
- 05000318/LER-1992-002, :on 920305,both Independent Containment Spray Sys Declared Inoperable.Caused by Failed Air Filter in Air Start Sys & Loss of EDG 21.Adequate Flow Restored & New Style Air Filters Installed (← links)
- 05000318/LER-1984-005, :on 840426,diesel Generators 12 & 21 Inoperable Simultaneously.Caused by Personnel Error.List of Equipment Required to Maintain Diesel Generator Operability Prepared & Operators Will Be Trained on Event Condition (← links)
- 05000318/LER-1984-004, :on 840421,during Surveillance test,13 of 16 Main Steam Safety Valve Setpoints Found Out of Tolerance. Setpoints Recalibr Prior to Test Completion.Frequency of Test Increased (← links)
- 05000318/LER-1981-030-03, Discovered Temp Transmitter 122HB Out of Tolerance in Nonconservative Direction.Caused Two Oscillators Producing Noise on Transmitter Output.Transmitter Replaced (← links)
- 05000318/LER-1984-001-01, :on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc (← links)
- 05000318/LER-1983-064-03, After Obtaining Results of Unit 1 HPSI Flow Balance Test,Six Unit 2 HPSI Header Isolation Valves Required Adjustment.Caused by Inadequate Procedures.Maint Procedures Revised (← links)
- 05000318/LER-1991-008, :on 911030,while Draining Steam Generator 21, Flow Rate Not Estimated Every 4 H When Measuring Device Inoperable.Caused by Insufficient Operator Attention to Detail.Operators Counseled (← links)
- 05000318/LER-1983-052-03, Auxiliary Feedwater Pump 23 Found Inoperable Due to Tripped Protective Relays. Probably Caused by Workers Shorting Internal Breaker Circuits When Working Scaffolding W/Door Open (← links)
- 05000318/LER-1995-005, :on 950524,facility Manually Tripped Due Ground Fault in Mcc.Area Around MCC 208 Quarantined,Action Taken to Strengthen Expectations & Work Practices & Maint Orders Issued to Inspect,Repair,Clean & Test MCC 208 (← links)
- 05000318/LER-1984-003, :on 840415,automatic Trip of Reactor Occurred Due to Low Reactor Coolant Flow Condition,Resulting from Loss of Reactor Coolant Pump 22b.Caused by Internal Short to Ground in Surge Capacitor (← links)
- 05000318/LER-1981-040-03, During Surveillance Testing,Msiv 22 Closing Time Exceeded Tech Spec Limit.Caused by Nonsteel Ring Binding Stem.Ring Replaced.Purchase Spec Revised (← links)
- 05000318/LER-1981-007-03, MSIVs 21 & 22 Failed to Shut within Required Time Limit.Caused by Galled Stems of Packing Junk Ring.Rings Replaced (← links)
- 05000318/LER-1982-046-03, Reactor Protective Sys Channel C Trip Unit for High Pressurizer Pressure Tripped. Caused by Failed Low Trip Bistable Power Supply.Power Supply Changed.Facility Change Request Written (← links)
- 05000318/LER-1984-002-01, :on 840313 & 22,condenser off-gas Radiation Monitor 2-RI-1752 Declared Inoperable & Grab Sample Not Taken During Period.Caused by Disconnected Connector Due to Improperly Functioning Bayonet Clasps (← links)
- 05000318/LER-1983-009-03, /03L-0:on 830116,pressurizer Level Deviated from Program Band by More than +/-5% Several Times & Pressurizer Pressure Decreased Below 2,225 Psia.Caused by Temp Swings Due to Startup Testing.Tech Spec Change Requested (← links)
- 05000318/LER-1983-005-03, /03L-0:on 830107,during Surveillance Testing, Shutdown Cooling Flow Lost.When Circulation Actuation Signal Manually Initiated,Operating Low Pressure Safety Injection Pump Stopped.Caused by Inadequate Procedure (← links)
- 05000318/LER-1982-012-03, Personnel Access Hatch Doors Opened Simultaneously.On 810307 & 09,inner Door Failed in Partially Open Position.Caused by Failed Airlock Mechanism Due to Broken Cam Follower.Overhaul Performed (← links)
- 05000318/LER-1995-004, :on 950414,fire Occurred in Section of Expansion Joint Matl in K Line Wall,Burning Approx Three Linear Feet of Cork Matl.Caused by Sparks from Welding Near Wall.Fire Watches Posted & Walkdown Performed (← links)
- 05000318/LER-1982-008-03, During Mode 3,inner Containment Door Would Not Latch,Preventing Outer Door from Opening.Caused by Failure of Air Mechanism Due to Broken Cam Follower.Overhaul Performed (← links)
- 05000318/LER-1978-049-03, /03L-0 on 781225:during Normal Operation,Cracked Weld Was Found on Suction Line of 23 Reactor Cooling Pump, Due to Crack in Charging Pump Suction Line Pumping (← links)
- 05000318/LER-1978-050-03, /03L-0 on 781225:during Surveillance Test,Leakage Was Found to Be 1.46 Gallons Per Minute.Reactor Was Shut Down.Cracked Weld Was Found on 21A Upper Seal Pressure Sensing Line,Caused by Fatigue (← links)
- 05000318/LER-1983-069-01, /01T-0:on 831219,during Return to Full Power Operation,Reed Switch Position Indication Lost for All Control Element Assemblies Due to High Voltage Condition on Metrascope Power Supplies.Power Replaced (← links)
- 05000318/LER-1983-068-03, /03L-0:on 831217,dose Equivalent I-131 Determined to Be 1.413 Uci Per G.Caused by Depressurization Shock Associated W/Shutdown.Sys Purified Utilizing Ion Exchanger. No Addl Corrective Action Necessary (← links)
- 05000318/LER-1983-063-03, /03L-0:on 831102,containment Particulate & Gaseous Monitor Skid Isolation Valve Inadvertently Shut.Caused by Close Proximity to Containment Sample Valve.Locking Device Attached to Prevent Closure (← links)
- 05000318/LER-1983-062-01, /01T-0:on 831123,2.1 Gpm Leak Found from Cracked Weld on Reactor Coolant Pump 21A Lower Seal Pressure Transmitter Line.Caused by Fatigue & Failure.Line Blanked Upstream of Leak.Piping Will Be Modified (← links)
- 05000318/LER-1983-061-03, /03L-0:on 831107,during Surveillance Test of ESF Actuation Sys Logic,Lpsi Pump 22 Could Not Be Restarted After Being Stopped on RAS Signal.Caused by Trip Latch Wipe Out of Adjustment (← links)
- 05000318/LER-1991-007, :on 910711,B Train Failure Occurred for Number 22 Bast Heater Circuit While Number 12 EDG Was Out of Svc. Caused by Component Failure.Replaced Fuses & Verified Integrity & Function of Control Power Circuit (← links)
- 05000318/LER-1983-060-03, /03L-0:on 831019,while at 70% Power,Water from Clogged Control Room Toilet Entered Control Room & Dripped Down Ceiling Into Cable Spreading Room,Shorting Components in Coil Power Programmers.Update Rept Expected (← links)
- 05000318/LER-1983-054-03, /03L-0:on 831011,main Feedwater Regulating Valve 21 Failed to Shut & Feed Flow Did Not Decrease to 5% within 20 S.Caused by Failed Horizontal Relay in Valve Positioner. Relay Replaced & Valve Tested Satisfactorily (← links)
- 05000318/LER-1983-059-03, /03L-0:on 831011,following Trip,Dose Equivalent I-131 Determined to Be 1.03 Mci/G.Caused by Leaking Fuel Pins & Power Level Change.Sampling Frequency Increased (← links)
- 05000318/LER-1983-056-03, /03L-0:on 831011,during Shutdown Operations, auto-start Failure Alarm Received for LPSI Pump 22.Pump Did Not Restart & Charging Spring Deenergized.Caused by Interlock Switch Out of Adjustment (← links)
- 05000318/LER-1983-058-03, /03L-0:on 831018,during RCS Heatup,Dissolved Oxygen Concentration Exceeded Transient Limit.Caused by Stagnant Portions of Higher Oxygenated RCS Water.Rcs Oxygen Determination Will Be Revised (← links)
- 05000318/LER-1983-055-03, /03L-0:on 830920 & 1019,pressurizer Level Decreased Below 133 Inches.Caused by Normal RCS Temp Swings. Investigation to Raise Program Level Currently in Progress (← links)
- 05000318/LER-1983-072-31, /03L-0:on 831217,MSIV 21 Inadvertently Shut.Low Pressure Hydraulic Line on MSIV 21 Became Disconnected & Hydraulic Fluid Reservoir Level Decreased.Caused by Failure of Swagelok Compression Fitting.Line Replaced (← links)
- 05000318/LER-1983-041-01, /01T-0:on 830824,malfunction of Main Turbine Control Circuitry Caused Rapid Closure of Intercept & Governor Valves.Possibly Caused by Malfunction of Turbine Runback.Circuits Deactivated (← links)
- 05000318/LER-1983-076-03, /03L-0:on 831227,CEA-1 Dropped Into Core & on 831228,CEA-64 Dropped Into Core.Cause Under Investigation. Current Traces Will Be Evaluated During Next Scheduled Test (← links)
- 05000318/LER-1983-037-01, ECCS Pump Room Exhaust Ventilation Sys Charcoal Filter Inlet Damper Failed to Open When Filter Bypass Damper Shut.Caused by Incorrect Connection.Damper Operators Mounted (← links)
- 05000318/LER-1983-077-03, /03L-0:on 831221,during Normal Operation,Leak Discovered in Charging Header Drain Line.Caused by Failure of 3/4-inch Socket Weld Due to Line Vibration & Lack of Restraint.Restraint Installed (← links)
- 05000318/LER-1983-020-03, Exhaust Damper to ECCS Room 21 Exhaust Fan HVAC-5437 Found Disconnected from Actuator.Caused by Loose Press Fitting Between Damper Level Arm & Bushing Due to Normal Wear (← links)
- 05000318/LER-1983-071-03, /03L-0:on 831219,during Return to Full Power, Power Dependent Insertion Limit (Pdil) for Group 4 Rods Found Inoperable.Caused by Setpoints Out of Tolerance at 35% Power.Pdil Readjusted (← links)
- 05000318/LER-1983-067-03, Charging Pump Discharge Relief Valve 23 Lifted.Caused by Damaged Disc.Disc Replaced. Further Testing Initiated to Correct Setpoint (← links)
- 05000318/LER-1983-070-03, /03L-0:on 831125,pressure Level Decreased to 116 Inches While Loading Main Turbine.Caused by RCS Temp Swings. Change to Pressurizer Program in Progress (← links)
- 05000318/LER-1991-006, :on 910615,loss of Control Room Emergency Ventilation Occurred Causing Plant Shutdown.Caused by Lack of Adequate Procedural Guidance.Establishing Task Force to Identify Problems (← links)
- 05000318/LER-1983-053-03, /03L-0:on 830914,control Power Fuse for Starter Cabinet Blew,Causing Containment Cooler 21 to Trip.Caused by Rowan 2084-EPRI-1120 Indicating Light Socket Short Circuit. Socket Replaced (← links)
- 05000318/LER-1983-051-03, /03L-0:on 830901,dose Equivalent I-131 Determined to Be 1.05 Uci/G.Caused by Small Number of Leaking Fuel Pins & Change in Power Level.Sampling Frequency Increased (← links)
- 05000318/LER-1983-022-03, Auxiliary Feedwater Actuation Sys Channel 2F Setpoint for Steam Generator Delta Pressure Found Out of Limit.Caused by Deterioration of High Speed Switching Transistor (← links)
- 05000318/LER-1994-006-01, :on 941027,Unit 2 Tripped on Receipt of Reactor Protective Sys Loss of Load Signal.Caused by Failure to Adequately Address Potential Risks of Work Newly Assumed by Electrical Maint Group.New Links Installed (← links)
- 05000318/LER-1983-048-03, /03L-0:on 830901,hydrogen Recombiner 21 Found Inoperable.Caused by Loose Hex Nut Allowing Terminals on Back of Potentiometer to Be Twisted & Pulled.Potentiometer Replaced (← links)
- 05000318/LER-1983-044-03, /03L-0:on 830823,motor Driven Auxiliary Feedwater Flow Indication Declared Inoperable.Caused by Low Zero Ref.Zero Ref Recalibr (← links)
- 05000318/LER-1983-002-03, Pressure Indicator PIC-103 Failed Low.Caused by Transmitter Leads Inadvertently Lifted,Rendering ERV-402 Inoperable.Personnel Counseled (← links)
- 05000318/LER-1994-005-01, :on 940924,reactor Trip Experienced Due to Main Turbine Governor Valve Opening.Wire on 21 Governor Valve LVDT Tightened & Wiring on All Other Unit 2 Main Turbine Throttle & Governor Valves Checked (← links)
- 05000318/LER-1983-047-03, /03L-0:on 830811,low Pressure Safety Injection Pump 21 Lost,Causing Loss of Shutdown Cooling.Caused by ESF Actuation Sys Za Actuation Whose Cause Is Unknown.Procedure Repeated W/O Further Actuation (← links)
- 05000318/LER-1983-042-01, /01T-0:on 830831,investigation of post-trip Data Revealed That Following Trips on 830809 & 22 Steam Generator 22 Filled Too Quickly.Caused by Feedwater Bypass Valve Positioner Out of Calibr (← links)
- 05000318/LER-1983-038-03, /03L-0:on 830809,following Reactor Trip,Dose Equivalent I-131 Determined to Be 2.03 Uci Per G.Caused by Change in Power Level & Iodine Spiking.Sampling Frequency Increased Per Tech Spec 3.4.8 (← links)
- 05000318/LER-1983-033-03, Fire Detection Instrumentation in Containment Southeast Electrical Penetration Area Determined Inoperable.Caused by Pinched Protecto Wire.Wire Repaired (← links)
- 05000318/LER-1983-034-03, /03L-0:on 830622,containment Atmosphere Particulate Radioactivity Monitor Inoperable Due to Torn & Wrinkled Filter Paper.Caused by Normal Air Sample Moisture & Air Flow.Mod to Prevent Tearing Designed (← links)
- 05000318/LER-1983-035-03, /03L-0:on 830623,main Steam Supply Valve to steam- Driven Auxiliary Feedwater Pumps Failed Open,Causing Auxiliary Feedwater Pump 21 to Start.Caused by Diaphragm Failure Due to Inadvertent Overpressurization (← links)
- 05000318/LER-1991-004, :on 910504,auxiliary Feedwater Actuation Occurred During Main Turbine Overspeed Test.Caused by Design Deficiency.Facility Mod Implemented Preventing SG Pressure & Steaming Transients (← links)
- 05000318/LER-1991-005, :on 910502,low Steam Generator Level Reactor Protective Sys Trip Occurred Due to Loss of Feedwater Event. Caused by Speed Controller Failure.Connector for Track & Hold Circuit Board Replaced (← links)
- 05000318/LER-1991-003, :on 910409,actuation Occurred While Plant Conducted CEA Testing Due to Personnel Accidentally Keying Radio Out of Sequence.Caused by Personnel Error.Security Post Changed,Preventing Radios Being Played (← links)
- 05000318/LER-1980-047-03, During Normal Operation, Containment RMS Pump Failed Resulting in Loss of Containment Gaseous & Particulate Radiation Monitors.Caused by Corrosion.Pump Replaced (← links)
- 05000318/LER-1981-050-03, Reactor Protective Sys Channel B Thermal Margin/Low Pressure Trip Unit Bypassed for Maint After Receiving Spurious Asymmetric Steam Generator Trips.Caused by Failed Signal Isolator (← links)
- 05000318/LER-1983-024-03, /03L-0:on 830418,charging Pump 22 Removed from Svc Upon Discovery of Leak on Discharge Relief Valve Line.Caused by Crack in Socket Weld Between Coupling & Inlet Pipe of Relief Valve,Due to Vibration.Weld Repaired (← links)
- 05000318/LER-1983-019-03, /03L-0 Has Been Canceled (← links)
- 05000318/LER-1983-015-03, /03L-0:on 830321,invalid in-core Detector Linear Heat Rate Alarm Revealed Incorrect Alarm Setpoints Entered on 830307.Caused by Improper Alarm Setpoint Forms.Setpoints Corrected & Forms Clarified (← links)
- 05000318/LER-1991-001-01, :on 910312,approx 1,900 Gallons of RCS Water Inadvertently Drained Through Containment Spray Ring & Drain Line Due to Personnel Error.Plan for Revising Individual Procedures in Operations Area Developed (← links)
- 05000318/LER-1991-002, :on 910327,ESF Actuation Occurred While Operator Was Restoring ESF Actuation Sys AL Actuation Logic Cabinet.Caused by Personnel Error.Operators Counseled & Other Personnel Informed of Event (← links)
- 05000318/LER-1983-018-03, /03L-0:on 830303,high Pressure Safety Injection Header Relief Valve RV-417 Declared Inoperable When Evaluation Revealed Support Needed for Header Integrity During Seismic Event.Caused by Inadequate Work Package (← links)
- 05000318/LER-1983-016-03, /03L-0:on 830303,diesel Generator 21 Rendered Inoperable When Power Lost to Diesel Auxiliary Motor Control Ctr.Caused by Blow Breaker Control Power Fuse & Improperly Installed Indicating Light Bulb (← links)
- 05000318/LER-1994-004-01, :on 940810,experienced Reactor Trip Due to Main Generator Trip.Caused by Loss of Field Relay.Replacement of Failed Components Completed & Refresher Training Provided for Operators (← links)
- 05000318/LER-1983-031-03, /03L-0:on 830606,containment Cooler 21 Failed to Start in Slow Speed Upon Containment Spray Actuation Test Signal.Caused by Failure of Low Speed Contacts.Replacement Relay to Be Installed (← links)
- 05000318/LER-1983-017-03, /03L-0:on 830218,power Lost to Saltwater Outlet Valves for 21 Svc Water & 21 Component Cooling Water Hx. Caused by Installation of Wrong Value Fuses.Correct Fuses Installed (← links)
- 05000318/LER-1983-030-03, /03L-0:on 830516,pressurizer Pressure Decreased to 2,185 Psia & Pressurizer Level Decreased to 128 Inches. Caused by Closed Hydraulic Dampener Bypass Valves on Turbine Bypass Control Valves.Valves Opened (← links)
- 05000318/LER-1983-027-03, /03L-0:on 830522,power-dependent Insertion Limit (Pdil) for Group 5 Rods Found Inoperable,Rendering Control Element Assembly Motion Inhibit Inoperable.Caused by Failure of Pdil Auctioneering Card Semiconductor (← links)
- 05000318/LER-1983-029-03, /03L-0:on 830515,during Startup,Dose Equivalent I-131 Determined to Be 1.38 Uci Per G.Caused by Iodine Spiking Due to Leaking Fuel Pins & Change in Power Level. Sampling Frequency Increased (← links)
- 05000318/LER-1983-026-03, /03L-0:on 830515,MSIV 21 Stroked Shut in 3.62 s, Exceeding Tech Spec Limit.Caused by Loose Arm on Position Switch 2-25-4043A.Arm Adjusted & Tightened & full-stroke Test Will Be Performed During Next Shutdown (← links)
- 05000318/LER-1983-028-03, /03L-0:on 830516,accumulator 12 on MSIV 21 Found to Have Ruptured Bladder.No Cause Stated.Accumulator Repaired & MSIV Declared Operable.Msiv 21,accumulator 5,will Be Replaced During Next Hot Shutdown (← links)
- 05000318/LER-1983-010-03, /03L-0:on 830208,during Surveillance Testing, Auxiliary Feedwater Actuating Sys Channel Zf Setpoint Found Out of Spec.Investigation Found Converter 2-E/I-1023C Out of Calibr,Zero & Span.Cause Unknown.Converter Recalibr (← links)
- 05000318/LER-1983-012-03, /03L-0:on 830211 & 0306,dose Equivalent I-131 Exceeded 1.0 Mci/G.Caused by Iodine Spiking Due to Small Number of Leaking Fuel Pins & Change in Power Level. Frequency of Sampling Increased Until Levels Decreased (← links)
- 05000318/LER-1982-055-03, Vital Ac Inverter 22 Failed,Causing 120-volt Ac Vital Bus 22 to Deenergize.Caused by Improper Vital Instrument Bus Fuses.Proper Fuses Installed (← links)
- 05000318/LER-1980-023-03, Steam Generator Isolation Signal Block B Permitted Steam Generator Isolation Signal B to Be Blocked & Loci Sequencer Alarmed.Caused by Voltage Disturbance in Inverter Output (← links)
- 05000318/LER-1994-003-01, :on 940711,commenced Reactor Shutdown for Leak from Fatigue Crack in SIT Line.Support for Line Redesigned & Installed to Reduced Levels of Vibration to Acceptable Level & Similar Lines Examined (← links)
- 05000318/LER-1981-018-03, /03L-0:on 810414,short at Motor Connection Box Tripped Charging Pump 22.Caused by Insufficient Insulation of Lead.Facility Change Request Initiated for Std Ref for Low Voltage Application (← links)
- 05000318/LER-1982-015-03, /03L-0:on 820320,during Normal Operation,Negative Limit Setpoint for Channel a of Reactor Protection Sys Axial Shape Index Failed to Operate.Caused by Failure of Axial Power Distribution Module.Module Replaced (← links)
- 05000318/LER-1981-023-03, During Normal Operation, RCS Sample valve,CV-5467,failed to Seat Properly.Valve Actuator Spring Required Adjustment to Fully Close & Seat Valve.Valve Stroked & Leak Tested (← links)
- 05000318/LER-1983-006-03, /03L-0:on 830123,auxiliary Feedwater Actuating Sys Channel Zd for Steam Generator 21 Level Indicated Low.Caused by Failure of Level Transmitter 2-LT-1114A Due to Defective Zero Adjustment Potentiometer.Transmitter Replaced (← links)
- 05000318/LER-1983-004-03, /03L-0:on 830112,while Attempting to Feed Steam Generators,Auxiliary Feedwater Pump 22 Failed to Develop Sufficient Discharge Pressure.Caused by Governor Linkage Being Out of Adjustment.Linkage Adjusted (← links)
- 05000318/LER-1982-044-03, /03L-0:on 820915,emergency Diesel Generator 21 Tripped During Testing.Caused by Common Low Jacket Cooling Water Pressure Switch Isolation Valve Left Closed Following Maint.Valves Opened (← links)
- 05000318/LER-1983-014-03, /03L-0:on 830131,pressurizer Level Decreased to 120 Inches While Loading Main Turbine & to 127 Inches on 830204 Due to Excessive Feeding of Steam Generators While Shifting Steam Generator Feed Pump Steam Supply (← links)
- 05000318/LER-1983-013-03, /03L-0:on 830203,during Testing of Inverter 22, Emergency Diesel Generator 21 Failed to Start.Cause Not Determined.Diesel Operation Will Be Closely Monitored During ESF Actuation Sys.Update Expected If Failure Revealed (← links)
- 05000318/LER-1983-008-03, /03L-0:on 830131,containment Spray Header 21 Isolation Valve CV-4150 Found to Stroke Only Partially, Rendering Containment Spray Header 21 Inoperable.Caused by Improper Adjustment of Spring Adjuster.Adjustment Corrected (← links)
- 05000318/LER-1982-049-01, /01T-0:on 821022,w/RCS Partially Drained in Mode 6,hydrolasing Water Filled Steam Generator Past Nozzle Lip & Diluted RCS Boron Concentration.Procedural Step Added to Check Level Every 15 Minutes of Hydrolasing (← links)
- 05000318/LER-1982-051-03, /03L-0:on 821015,during Normal Operation,Turbine Bldg Svc Water Isolation Valve Failed Shut Twice.Caused by Failed Solenoid Valve Coil Due to Installation of Wrong Part.Personnel Instructed to Verify Parts Before Installing (← links)
- 05000318/LER-1982-052-03, /03L-0:on 821025,no Audible Source Range Indication Operable.All 4 Visual Indication Channels Operable.Caused by Administrative Controls Failure. Surveillance Test Procedure Corrected (← links)
- 05000318/LER-1982-047-03, /03L-0:on 821004,high Pressure Safety Injection Pump Breaker 23 to Bus 21 Would Not Close During Surveillance Testing.Caused by Incomplete Shutter Closure Prohibiting Spring Charging & Breaker Operation (← links)
- 05000318/LER-1982-045-03, /03L-0:on 821001,reactor Protection Sys Low Flow Trip Unit on Channel a Failed.Caused by Failed Low Power Supply (Lambda Part LCD-2-44).Failed Power Supply Replaced & Sent to Vendor for Analysis & Repair (← links)
- 05000318/LER-1982-004-01, During Surveillance Test, Steam Generator 22 Pressure Indication on Remote Shutdown Monitoring Instrumentation Panel Read High.Caused by Valve Packing Leak.Transmitter Recailbr (← links)
- 05000318/LER-1982-043-03, /03L-0:on 820929 & 1012,while Attempting to Parallel Emergency Diesel Generator 12 to 4-kV Bus,Generator Output Breaker Tripped,Rendering Generator Inoperable.Caused by Misaligned Contacts on Bus Disconnect Switch Key (← links)
- 05000318/LER-1981-019-03, /03L-0:on 810402 & 21 Emergency Diesel Generator 12 Output Breaker Failed to Close.Caused by Damaged Spring Charging Motor & Excessive Relay & Actuator to Switch Clearance.Clearances Checked Annually (← links)
- 05000318/LER-1981-017-03, /03L-0:on 810414,drain Line Accidentally Broken from Emergency Discharge of ECCS Pump Room Cooler 22.Caused by Dropped Tool Breaking Plastic Nipple.Scaffolding Checked to Ensure Required Toe Boards (← links)
- 05000318/LER-1981-020-03, /03L-0:on 810407,containment Atmosphere Particulate Radioactivity Detector Failed.Caused by Cable to Junction Box Connector Failure Due to Conductor Stress Formed During Repair Resulting in Split Connector Block (← links)
- 05000318/LER-1981-021-03, /03L-0:on 810412,transient Occurred Causing Pressurizer Pressure to Drop Below 2225 Psig.Caused by Excessive Injection of Boric Acid by Operator to Level Power Increase.Personnel Counseled (← links)
- 05000318/LER-1990-001-01, :on 901022,inadvertent ESF Actuation Occurred Due to Insufficient Communication of Plant Status (← links)
- 05000318/LER-1982-040-03, /03L-0:between 820825 & 26,pressurizer Level Deviated Slightly from Program Level by More than 5% During Normal Startup Operations.Caused by Loading of Main Turbine Generator.Rcs Temp Swings of 10 Degrees Not Uncommon (← links)
- 05000318/LER-1982-041-03, /03L-0:on 820826,excessive Leak Rate Discovered Past Containment Personnel Air Lockout & Door Gasket.Caused by Decrease in Force Holding Door Shut.Door Operating Mechanism Adjusted to Increase Pressure (← links)
- 05000318/LER-1994-002-01, :on 940305,inadvertent ESF Actuation Occurred Due to Less than Adequate Self Verification.Expectations to Restart self-verification Process If Interrupted Reemphasized (← links)
- 05000318/LER-1982-037-03, /03L-0:on 820730,outer Personnel Air Lock Door Opening Mechanism Failed,Preventing Door Closure.Mechanism Failure Due to Broken Cam Follower.Modified Parts Made of Stronger Matls Will Be Installed During Fall 1982 Outage (← links)
- 05000318/LER-1994-001, :on 940112,Unit 2 Tripped When Electrical Protective Relay Actuated.Caused by Opening of Kv Feeder Breaker.Voltage Regulator Transfer Switch Assemblies Tagged & Locked in Bypass Mode (← links)
- 05000318/LER-1982-033-01, Six Accessible Snubbers in Main Feedwater & Auxiliary Steam Supply Sys Not Tested According to Surveillance Test Program.Caused by Discrepancy Between safety-related Item List & Piping Stress Analyses (← links)
- 05000318/LER-1982-053-03, /03L-0:on 821122,while de-energizing Instrument Power Supply Panel 2402,shutdown Cooling Flow Lost Due to Closing of Shutdown Cooling Return Valve.Caused by Incorrect Installation of Temporary Jumper Due to Personnel Error (← links)
- 05000318/LER-1982-039-01, /01T-0:on 820824,employee Opened Inner Emergency Air Lock Door When Outer Door Not Secured.Release Calculated at 4.83E-8MR.Caused by Possible Misadjustment of Swing Actuating Rods (← links)
- 05000318/LER-1981-011-03, /03L-0:on 810404,steam Generator 21 Pressure Instrument 2-PY-1013D Failed,Causing Channel D Thermal Margin/Low Pressure Trip.Caused by Failure of Sealed, Nonadjustable,Solid State Load Isolator.Device Discarded (← links)
- 05000318/LER-1981-016-03, /03L-0:on 810317,during Normal Power Operation, motor-operated Main Feedwater Isolation Valve 2-MOV-4517 Experienced Loss of Power When Main Circuit Breaker Ground Sensor Tripped.Caused by Personnel Error (← links)
- 05000318/LER-1981-025-03, /03L-0:on 810430 & 0514,reactor Protective Sys Channel B Trip Units Bypassed to Investigate T-hot Channel B Problem.Caused by Temp Transmitter Drift (← links)
- 05000318/LER-1993-005-01, :on 931203,found That Main Vent Iodine & Particulate Sampler Pump Not Running.Caused by Lack of self- Checking by Watchstander.Change Will Be Implemented to Replace Current Iodine & Particulate Sampler (← links)
- 05000318/LER-1982-036-03, /03L-0:on 820719,during Normal Operation, Containment Particulate Radiation Monitor Observed Reading Below Tech Spec Limit.Caused by Signal Pin Detached from Field Cable Connector DSOF-12P-059 at Instrument Drawer (← links)
- 05000318/LER-1982-021-03, LER-021/03L-0:on 820714,22B Safety Injection Tank Pressure Found Decreased to 197 Psig on 820427.Caused by Loop Isolator Failure.Isolator Replaced (← links)
- 05000318/LER-1980-059-03, /03L-0:on 801226,while Investigating Abnormal Containment Air Particulate & Gaseous Readings,Discovered That Containment Atmosphere Sample Isolation Valve Was Shut. Caused by Personnel Error.Operators Instructed (← links)
- 05000318/LER-1980-041-03, /03L-0:on 800915,while Performing Preventive Maint,Control Element Assembly (CEA) 9 Dropped Into Core. Cause Undetermined.Electrical Test of CEA Performed & Recorded Traces Analyzed (← links)
- 05000318/LER-1982-034-01, /01T-0:on 820720,salt Water Flow Through Svc Water HX 21 & 22 Lost,Rendering Exchangers Inoperable.Caused by Salt Water Valve 2SW197 Failure Due to Sheared Pins.New Valve Installed (← links)
- 05000318/LER-1980-035-01, /01T-0:on 800730,instrument Tubing Connecting Air Start Headers for Emergency Diesel Generators to Two Pressure Switches Monitoring Air Receiver Pressure Not Seismically Qualified.Caused by Faulty Design (← links)
- 05000318/LER-1979-008-03, /03L-0 on 790208:22B Safety Injection Tank Level & Pressure Were Below Tech Spec Min Due to Fill Valve Not Shutting Tightly After Being Opened for Drainage.Tank Refilled & Valve Successfully Cycled Several Times (← links)
- 05000318/LER-1979-004-03, /03L-0 on 790127:during Routine Startup of Auxiliary Feedpump,Throttle Valve Would Not Reset.Caused by Disengagement of Traveling Nut Thread During Operation of Valve (← links)
- 05000318/LER-1978-040-03, /03L-0 on 781117: 5 Halon sub-sys Discharged When Door to 22 Inverter Was Open.Caused by Thermal Detector Being Overly Sensitive to Rate of Rise of Temp.When Door Opened,Internal Airflow Disturbed,Setting Off Detector (← links)
- 05000318/LER-1978-040, Forwards LER 78-040/03L-0 (← links)
- 05000318/LER-1978-043-03, /03L-0 on 781126:during Monthly Surveillance Test CEA 3 Dropped to Bottom of Core at 0049.Pwr Reduced to 70% Per Tech Specs Until CEA 3 Was Restored to Its Group Position at 0158 (← links)
- 05000318/LER-1978-043, Forwards LER 78-043/03L-0 (← links)
- 05000318/LER-1978-039-03, /03L-0 on 781115:during Normal Oper Periodic Water Inventory Balance Indicated That Unidentified Reactor Coolant Leakage Was 1.72 Gpm at 0600.Leak Identified as Cracked Weld (← links)
- 05000318/LER-1978-039, Forwards LER 78-039/03L-0 (← links)
- 05000318/LER-1978-041-03, /03L-0 on 781115:RWT Level Discovered to Be at 455 Inches.Caused by Rad-Chem Technicians Failure to Fully Close Local Sample Valve After Drawing Routine Sample. Technician Has Been Reinstructed in Valve Sampling (← links)
- 05000318/LER-1978-041, Forwards LER 78-041/03L-0 (← links)
- 05000318/LER-1978-038-01, /01t-0 on 781025:during LPPT in Mode 2,containment Air Lock Was Opened to Repair Failed Oper Mechanism & Was Kept Ajar,Due to Misunderstanding Between Supervisor & Maintenance Personnel.All Personnel Have Been Reinstructed (← links)
- 05000318/LER-1978-038, Forwards LER 78-038/01T-0 (← links)
- 05000318/LER-1978-037-03, /03L-0 on 781025:during Oper,Reactor Protec Instru Wide Range Logarithmic Neutron Flux Monitor Channel a Read 2 Decades Lower than Other Channels,Due to Connector,For Channel a Not Being Dried Completely When Recently Cleane (← links)
- 05000318/LER-1978-037, Forwards LER 78-037/03L-0 (← links)
- 05000318/LER-1981-056-03, Normal Containment Sump Isolation Valve Discovered Open.Caused by Movement of Valve Stem Bushing.Valve Repaired & All Other Containment Sump Isolations Checked Using New Overhaul Procedure (← links)
- 05000318/LER-1978-036-01, /01T-0 on 781023:during Routine Test of Steam Generator Isolation Signal logic,21 Main Steam Isolation Valve Failed to Shut Upon Sgisa & Sgisb Signal or Hand Switch in Control Room,Due to Sticking MSIV Solenoid Valves (← links)
- 05000318/LER-1978-036, Forwards LER 78-036/01T-0 (← links)
- 05000318/LER-1978-035-01, /01T-0:on 781017,air Binding of LPSI Pumps Resulted When Air Being Used to Transfer Purification Sys Resin Leaked Into SDC Sys.Operating Instructions Will Be Revised (← links)
- 05000318/LER-1978-033-03, /03L-0:on 780924,while Filling Refueling Pool from Refueling Water Tank,Rcs Actuated & Tripped Both LPSI Pumps. Caused by Incorrect Calibr of Sigma Instrument Level Indicator 2-LI-4143 (← links)
- 05000318/LER-1993-004-01, :on 931202,axial Shape Index Channel Error Occurred Due to Insufficent Trouble Shooting Review.Caused by Insufficent Maint Testing Performed Prior to Declaring Channel Operable.Procedures Revised (← links)
- 05000318/LER-1982-035-03, /03L-0:on 820701,discovered Drain Valve Broken Off Saltwater Discharge Line from Svc Water HX 21.Caused by 3/4- Inch Corroded Pipe Nipple & Valve Impacted & Severed from Saltwater Discharge Line.Repair Made W/Welded Coupling (← links)
- 05000318/LER-1982-030-01, /01T-0:on 820630,4-inch Diameter Hole Discovered Between 27-foot Switchgear Room & Main Steam Generation Room.Caused by Workmen Drilling for Conduit Installation. Work Procedures Modified (← links)
- 05000318/LER-1982-033-03, /03L-0:on 820702,six Accessible Snubbers in Main Feedwater & Auxiliary Steam Supply Sys Not Tested.Caused by Discrepancy Between safety-related Items List & Piping Stress Analysis.Snubbers Upgraded & Tested (← links)
- 05000318/LER-1982-028-03, /03L-0:on 820604 & 06,steam Generator Channel a Level Transmitter 21 Failed High.No Cause Found.On 820606, Zero Adjustment Clip on transmitter,2-LT-1113A,found Broken. Transmitter Replaced (← links)
- 05000318/LER-1982-029-03, /03L-0:on 820604 & 05,during Normal Operation, Containment Particulate Radiation Monitoring Sys Detector Read Low & Declared Inoperable.Caused by Bent Detector Cable Pulling Free Five Connector Wires.Wires Resoldered (← links)
- 05000318/LER-1982-026-03, /03L-0:on 820602,while Inserting Rods to Reduce power,CEA-64 Dropped Into Core.Power Reduced & CEA-64 Withdrawn.Cause Undetermined.Timer & Upper Gripper Power Switch Replaced to Prevent Recurrence (← links)
- 05000318/LER-1982-027-03, /03L-0:on 820522,during Normal Operation, Pressurizer Level Deviated Slightly from Design Program. Cause Unknown.Possible Bad Contact in Reactor Regulating Sys Selector Switch Indicated (← links)
- 05000318/LER-1982-025-01, /01T-0:on 820602,emergency Diesel Generators 21 & 12 Tripped on Loss of Field & Declared Inoperable. Caused by Voltage Drift.Emergency Diesel Generator Voltage Regulator Assembly Replaced (← links)
- 05000318/LER-1982-024-03, /03L-0:on 820514,ESF Actuation Sys Channel C Pressurizer Pressure Failed Low,Resulting in Removal of Channel Zf & Subcooled Margin Monitor 22 from Svc.Caused by Fault in Ac/Dc Converter Isolator 2-PY-102C (← links)
- 05000318/LER-1980-011-01, Diesel Generator 21 Failed to Achieve 10-s Rated Speed,Rendering Low Pressure Safety Injection Pump 22 Inoperable.Caused by Slow Response of Diesel Generator Governor.Governor Replaced (← links)
- 05000318/LER-1982-022-03, /03L-0:on 820509,control Element Assembly 43 Reed Switch Position Indicator Channel Erroneously Indicating 127 Inches Withdrawn Rendering Channel Inoperable.Caused by Failed Reed Switch (← links)
- 05000318/LER-1982-023-03, /03L-0:on 820417,during Normal Startup Operations, Pressurizer Deviated Excessively from Program Level.Caused by RCS Temp Swings During Loading of Main Turbine Generator (← links)
- 05000318/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000318/LER-1982-018-03, /03L-0:on 820417,control Element Assembly 21 Dropped Into Core After Electricians Inadvertently Disconnected Power,Resulting in Pressurizer Level Deviation Exceeding Tech Spec Limit.Caused by Personnel Error (← links)
- 05000318/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000318/LER-1982-016-03, /03L-0:on 820402,during Normal Power Operation, Plant Computer Failed,Resulting in Loss of CEA Pulse Counting Sys & Incore Detection Sys.Apparently Caused by Intermittent Signal.Computer Restarted by Bootstrapping (← links)
- 05000318/LER-1982-016, Forwards LER 82-016/03L-0 (← links)
- 05000318/LER-1982-019-03, /03L-0:on 820328,during Normal Operation,Cea 38 Reed Switch Position Indicator Channel Was Erroneously Indicating 3 Inches Withdrawn.Possibly Caused by Intermittent Transmitter Reed Switch Operation (← links)
- 05000318/LER-1982-019, Forwards LER 82-019/03L-0 (← links)
- 05000318/LER-1982-011-03, Steam Generator Pressure Indicator PI-1023A Read High.Caused by Mechanically Binding Force Resulting in Calibr Problem.Force Motor on Pressure Transmitter PT-1023A Replaced (← links)
- 05000318/LER-1982-011, Forwards Updated LER 82-011/03X-1 (← links)
- 05000318/LER-1982-017-03, /03L-0:on 820407,w/charging Pump 22 Out of Svc, Charging Pump 23 Removed from Svc to Repair Packing Leak. Cause of Leak Not Stated.Packing Replaced & Pump Returned to Svc (← links)
- 05000318/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000318/LER-1982-020-03, /03L-0:on 820412,channel a Trip Units for Low Steam Generator Pressure & Thermal Margin/Low Pressure Were Bypassed Due to Greater than 22 Psi Deviation Between Channels.Channel a Transmitter Replaced (← links)
- 05000318/LER-1982-020, Forwards LER 82-020/03L-0 (← links)
- 05000318/LER-1982-014-03, /03L-0:on 820304,water Observed in Emergency Diesel Generator Lube Oil Dry Tank.Caused by Filling Tank from Unsampled Barrel of Oil Which Had Significant Amount of Water.New Procedure Written (← links)
- 05000318/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000318/LER-1982-007-03, /03L-0:on 820223,auxiliary Feedwater Flow Indication to Steam Generator 22 Indicated 70 Gallons Per Minute W/No Flow in Line.Possibly Caused by Personnel Error. Flow Transmitter Dampening Adjustment Improperly Set (← links)
- 05000318/LER-1982-013-03, /03L-0:on 820316,containment Bldg Spray Header 21 Inadvertently Isolated by Closing Valve 2-SI-315.Caused by Auxiliary Bldg Operator Error.Operator Counseled (← links)
- 05000318/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000318/LER-1982-007, Forwards LER 82-007/03L-0 (← links)
- 05000318/LER-1982-006-03, /03L-0:on 820219,during Mode 5 Operation,While Conducting Surveillance Testing,Leakage Past CTMT Purge Supply & Exhaust Valves Was Found in Excess of Tech Specs. Caused by Normal Wear of Ethylene Proplene Seats (← links)
- 05000318/LER-1982-006, Forwards LER 82-006/03L-0 (← links)
- 05000318/LER-1982-001-03, /03L-0:on 820118,discovered Excessive Leak Rate Past Containment Personnel Air Lock Outer Door.Caused by Decrease in Force Holding Door Shut.Door Operating Mechanism Adjusted to Increase Force (← links)
- 05000318/LER-1982-001, Forwards LER 82-001/03L-0 (← links)
- 05000318/LER-1993-003-01, :on 930625,SG Tripped Due to Low Water Level. Caused by Insufficient Feedwater Addition Due to Inadequate Communication.Reemphasis on Improved Communication Stressed (← links)
- 05000318/LER-1993-002-01, :on 930608,inadvertent Arw Actuation Sys & RPS Actuations Experienced During Performance of Awf Sys Large Flow Surveillance Testing.Caused by Failure to Note Differential Pressure Condition.Valve Opened (← links)
- 05000318/LER-1982-004-03, /03L-0:on 820211,steam Generator 22 Pressure Indication on Remote Shutdown Monitoring Instrumentation Panel Read High.Caused by Large MSIV Packing Leak.Msiv Repaired & Transmitter Recalibr & Returned to Svc on 820223 (← links)
- 05000318/LER-1982-010-03, /03L-0:on 820212,control Element Assembly CEA-19 Found Stuck in 8-inch Withdrawn Position Following Reactor Trip.Cause Unknown.Assembly Manually Freed After Plant Cooldown,Exercised & Drop Tested Satisfactorily (← links)
- 05000318/LER-1982-010, Forwards LER 82-010/03L-0 (← links)
- 05000318/LER-1982-005-01, /01T-0:on 820223,discovered Jet Impingement Barrier in Main Steam Penetration Room Not Completely Installed.Caused by Personnel Error.Maint Procedure to Be Changed (← links)
- 05000318/LER-1982-005, Forwards LER 82-005/01T-0 (← links)
- 05000318/LER-1982-009-03, /03L-0:on 820206 & 25,pressurizer Level Exceeded Tech Spec Requirements During Normal Startup Operations. Caused by Normal RCS Temp Swings.Investigation to Relax Limit Underway (← links)
- 05000318/LER-1982-009, Forwards LER 82-009/03L-0 (← links)
- 05000318/LER-1982-002-03, /03L-0:on 820204,during Surveillance Testing,, Feeder Breaker 152-2101 Tripped Open Causing Loss of Power to 21-4 Kv Bus.Caused by Failed Isolator Module.Isolator Replaced & Sys Tested Satisfactorily (← links)
- 05000318/LER-1982-003-03, /03L-0:on 820120,during Normal Operation, Containment Atmosphere Gaseous Radioactivity Monitor Declared Inoperable.Caused by Failed Detector (Lnd,Inc Type 71916) tube-to-connector Seal.Monitor Repaired (← links)
- 05000318/LER-1982-003, Forwards LER 82-003/03L-0 (← links)
- 05000318/LER-1981-049, Updated LER 81-049/04T-0:on 811109,main Vent & Waste Gas Discharge Header Radiation Monitors Alarmed.Probably Caused by Gas Leakage Past VCT Supply Check Valve W/Vct Relief Valve Lifting at Below Setpoint Pressure (← links)
- 05000318/LER-1981-057-03, /03L-0:on 811215,excessive Leak Rate Discovered Past Containment Personnel Air Lock Outer Door.Caused by Loose Handwheel Shaft Penetration Seal.Seal Packing Gland Tightened (← links)
- 05000318/LER-1981-057, Forwards LER 81-057/03L-0 (← links)
- 05000318/LER-1981-054-03, /03L-0:on 811206,control Element Assembly Dropped Into Core,Reducing Power Below Tech Spec Limits.Cause Unknown.Return to Assembly Venting During Plant Fill Operations Has Reduced Drop Frequency (← links)
- 05000318/LER-1981-054, Forwards LER 81-054/03L-0 (← links)
- 05000318/LER-1981-055-03, /03L-0:on 811204,charging Pump Developed Packing Leak.Caused by Flaking of Ceramic Coating on Charging Pump Plunger.Plunger Replaced & Pump Repacked (← links)
- 05000318/LER-1981-055, Forwards LER 81-055/03L-0 (← links)
- 05000318/LER-1981-051-03, /03L-0:on 811109,RCS Net Leakage Found to Be 2.1 Gpm.Caused by Crack Due to Vibrations in Weld on Adapter to Tubing on Reactor Coolant Pump Middle Seal Pressure Sensing Line.Engineering Evaluation Continuing (← links)
- 05000318/LER-1981-051, Forwards LER 81-051/03L-0 (← links)
- 05000318/LER-1981-052-03, /03L-0:on 811113,reactor Protective Sys Channel B Trip Units for Higher Power,Thermal Margin/Low Pressure & Axial Shape Index Bypassed for Corrective Maint.Caused by delta-T Potentiometer Malfunction Due to Normal Wear (← links)
- 05000318/LER-1981-052, Forwards LER 81-052/03L-0 (← links)
- 05000318/LER-1981-045-01, Discovered That Component Cooling Isolation Valve to Containment Would Fail in Unconservative Position on Loss of Instrument Air or Loss of Ac Power.Administrative Controls Revised (← links)
- 05000318/LER-1981-045, Forwards Updated LER 81-045/01X-1 (← links)
- 05000318/LER-1981-053, Forwards LER 81-053/03L-0 (← links)
- 05000318/LER-1981-050, Forwards LER 81-050/03L-0 (← links)
- 05000318/LER-1981-048-04, /04T-0:on 811105,U-2 Main Vent Flow Monitoring Instrument Found Inoperable.Caused by Broken Taps on Monitoring Manometer,Possibly Resulting from Excess Stress on Plastic Device During Handling.Device Replaced (← links)
- 05000318/LER-1981-048, Forwards LER 81-048/04T-0 (← links)
- 05000318/LER-1980-060-03, /03L-0:on 801226,after Returning Containment Air Particulate (Apd) & Gaseous Monitors to Svc,Apd Remained Inoperable.Caused by Failure of Air Particulate Detector Junction Box Connector,Causing Abnormal High Indication (← links)
- 05000318/LER-1980-060, Forwards LER 80-060/03L-0 (← links)
- 05000318/LER-1993-001-01, :on 930220,plant Found to Be in Condition Outside Design Basis When Pressurizer Code Safety Valve Found W/Lift Setpoints Due to Imprecision Associated W/Test Methodology.Valves Setpoints Will Be Verified (← links)
- 05000318/LER-1981-047-01, /01T-0:on 811105,svc Water Pump Room Drain Lines to Turbine Bldg Found to Lack Back Flow Protection, Compromising Room Watertight Integrity.Caused by Lack of Check Valve in Drain Lines from Svc Water Pump Room (← links)
- 05000318/LER-1981-047, Forwards LER 81-047/01T-0 (← links)
- 05000318/LER-1981-046-03, /03L-0:on 811017,containment Sump Level Alarm Determined Inoperable.Caused by Dirt or Debris Interfering W/Level Switch Float Operation Which Was Washed Clean by Normal Leakage Into Sump.Will Inspect Level Switch (← links)
- 05000318/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000318/LER-1981-024-01, Auxiliary Feedwater Pump 21 Inadvertently Tripped by Contractor Personnel Working in Area.Personnel Instructed on Operation of Trip Device & Alarm Installed to Indicate Tripping (← links)
- 05000318/LER-1981-024, Forwards Updated LER 81-024/01X-1 (← links)
- 05000318/LER-1981-043-03, /03L-0:on 810820,channel a Reactor Protective Sys Trip Units for Hi Power,Thermal Margin/Low Pressure & Axial Shape Index Were Bypassed to Troubleshoot Erratic Input. Probably Caused by vibration-induced Open Element (← links)
- 05000318/LER-1981-043, Forwards LER 81-043/03l-0 (← links)
- 05000318/LER-1981-034-03, /03L-0:on 810709,reactor Protective Sys Channel D Hipower,Thermal Margin/Low Pressure & Axial Shape Index Trip Units Were Bypassed Due to Discrepancy in T-hot.Possibly Caused by Grit Entering Connection (← links)
- 05000318/LER-1981-034, Forwards LER 81-034/03L-0 (← links)
- 05000318/LER-1983-002, Forwards LER 83-002/03L-0 (← links)
- 05000318/LER-1983-003-01, /01T-0:on 830112,air Line Supplying Two Auxiliary Feedwater Regulating Valve I/Ps Became Disconnected Causing Valves AFW-4511 & AFW-4512 to Fail Open.Caused by Improper Installation of Tubing Connector.Air Line Repaired (← links)
- 05000318/LER-1983-003, Forwards LER 83-003/01T-0 (← links)
- 05000318/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000318/LER-1981-015-03, /03L-0:on 810319,results of Routine Sample of Boric Acid Storage Tank 21 Revealed Boric Acid Concentration Greater than Tech Spec Limit,Reducing Borated Warer Sources to One.Cause Undetermined (← links)
- 05000318/LER-1981-015, Forwards LER 81-015/03L-10 (← links)
- 05000318/LER-1981-013-03, /03L-0:on 810304,while Installing Instrumentation, Temporary Shunt Opened,Causing Loss of Power to Low Pressure Safety Injection Pump 22 & Momentary Loss of Shutdown Cooling Flow.Caused by Opened Lead on One End of Shunt (← links)
- 05000318/LER-1981-013, Forwards LER 81-013/03L-0 (← links)
- 05000318/LER-1981-014-03, /03L-0:on 810305,4-kV Buses 21 & 24 ESF Actuation Sys Degraded Voltage Relays Found Out of Calibr.Cause Unknown.Trip Setpoints Readjusted.Relays Will Be Tested at Increased Frequency (← links)
- 05000318/LER-1981-014, Forwards LER 81-014/03L-0 (← links)
- 05000318/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000318/LER-1981-022-03, /03L-0:on 810419,during Power Increase,Containment Gaseous & Particulate Radioactivity Monitoring Sys Sample Failed.Caused by Broken Motor Coupling.Motor Coupling Replaced (← links)
- 05000318/LER-1981-022, Forwards LER 81-022/03L-0 (← links)
- 05000318/LER-1983-021-03, /03L-0:on 830504,containment Sump Alarms Declared Inoperable.Caused by Defective Alarm Card.Alarm Card Replaced.Annunciator Alarm Will Be Checked Daily (← links)
- 05000318/LER-1983-025-03, /03L-0:on 830426,saltwater Inlet Valves to Circulating Water Pump Room Air Coolers SW5250 & SW5251 Discovered Open While Automatic Safety Injection Actuation Signal Disabled.Caused by Inadequate Procedure (← links)
- 05000318/LER-1983-023-03, /03L-0:on 830405,control Power Fuse for Main Vent RMS Panel (1C22F) Blew Due to Short Circuit.Caused by Short When Control Circuit Relay Auxiliary Contacts Jumpered. Electricians Cautioned.Wiring Properly Labeled (← links)
- 05000318/LER-1983-023, Forwards LER 83-023/03L-0 (← links)
- 05000318/LER-1989-012-01, :on 891227,core Alterations Performed W/Only One of Two Containment Vent Valves Closed.Caused by Procedural Deficiency.Procedures Revised to Include Valve & Surveillance Test Program Instruction Revised (← links)
- 05000318/LER-1981-044-03, /03L-0:on 810922,pressurizer Level Had Deviated from Program Level by More than +/-5% Several Times Over 30- Day Period.Cause Attributed to Temp Swings During Startup Operations.Possible Relaxation of Limit Under Review (← links)
- 05000318/LER-1981-044, Forwards LER 81-044/03L-0 (← links)
- 05000318/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000318/LER-1981-041, Forwards LER 81-041/03L-0 (← links)
- 05000318/LER-1981-039-03, /03L-0:on 810810,reactor Protection Sys Channel D Trip Points for Hi Power,Thermal Margin/Low Pressure & Axial Shape Index Bypassed to Troubleshoot Erratic Tc Indications.Possibly Caused by Detector or Loose Connection (← links)
- 05000318/LER-1981-039, Forwards LER 81-039/03L-0 (← links)
- 05000318/LER-1981-036-03, /03L-0:on 810804,during Normal Operation,Reactor Protection Sys Channel B Hi Power,Thermal Margin/Low Pressure & Axial Shape Index Units Were Bypassed.Caused by Nuclear Instrumentation Power Spikes Causing Spurious Trips (← links)
- 05000318/LER-1981-036, Forwards LER 81-036/03L-0 (← links)
- 05000318/LER-1981-042-03, /03L-0:on 810821,pressurizer Level Deviated from Program Level by More than 5%.Caused by Normal Startup Operations (← links)
- 05000318/LER-1981-042, Forwards LER 81-042/03L-0 (← links)
- 05000318/LER-1981-037-03, /03L-0:on 810802,operator Observed Containment Particulate Monitor Reading Lower than Normal.Caused by High Humidity of Containment Sample.Detector Socket Pins Had Corroded,Resulting in Electrical Leakage to Ground (← links)
- 05000318/LER-1981-037, Forwards LER 81-037/03L-0 (← links)
- 05000318/LER-1981-038-03, /03L-0:on 810730,diesel Generator 21 Experienced High Jacket Coolant Water Temp Rendering Diesel Generator Inoperable.Caused by Tripping of Jacket Coolant Recirculation Pump Motor Overload Device.Pump Reset (← links)
- 05000318/LER-1981-038, Forwards LER 81-038/03L-0 (← links)
- 05000318/LER-1981-032-03, /03L-0:on 810704,during Operator Insp,Operator Noted Water Dripping from Reactor Coolant Pump 22 Bay.Cause Unknown.Repair Will Be Initiated When Sys Becomes Available for Maint (← links)
- 05000318/LER-1981-032, Forwards LER 81-032/03L-0 (← links)
- 05000318/LER-1981-035-03, /03L-0:on 810703,leak Found on Reactor Coolant Charging Header.Caused by Row of Pinhole Porosities in Original Socket Weld on Charging Header Drain Line. Temporary Weld Repair Performed (← links)
- 05000318/LER-1981-035, Forwards LER 81-035/03L-0 (← links)
- 05000318/LER-1981-031-03, /03L-0:on 810619,bypass Dampers Did Not Shut W/Damper Control Handswitch in Filter Position,Resulting in ECCS Pumproom Exhaust Fan Inoperability.Caused by Air Solenoid Valve Leaking Through Maintaining Air Pressure (← links)
- 05000318/LER-1981-031, Forwards LER 81-031/03L-0 (← links)
- 05000318/LER-1981-033-03, /03L-0:on 810704,pressurizer Level Deviated Excessively from Program Level While Paralleling Main Turbine Generator.Caused by RCS Temp Swing,Not Uncommon During Paralleling Process (← links)
- 05000318/LER-1981-033, Forwards LER 81-033/03L-0 (← links)
- 05000318/LER-1981-029-03, /03L-0:on 810609,reactor Protection Sys Channel a Trip Unit for Thermal Margin/Low Pressure Monitor Was Found to Be Faulty.Caused by Bistable Trip Unit ATU7 Not Tripping at Appropriate Signal Levels.Trip Unit Replaced (← links)
- 05000318/LER-1981-029, Forwards LER 81-029/03L-0 (← links)
- 05000318/LER-1981-027-03, /03L-0:on 810602,during Surveillance Testing,Hpsi Pump 23 Failed to Start.Caused by Failure of Control Time Delay Relay.Relay Replaced (← links)
- 05000318/LER-1981-027, Forwards LER 81-027/03L-0 (← links)
- 05000318/LER-1981-026-03, Discharge Damper to ECCS Pump Room Exhaust Fan 22 Failed Shut.Caused by Linkage Rod Shifting from Proper Position.Linkage Repaired & Adjusted. Preventive Maint Procedure to Be Instituted (← links)
- 05000318/LER-1981-026, Forwards Updated LER 81-026/03X-1 (← links)
- 05000318/LER-1981-028-01, /01T-0:on 810613,C-E Informed That Pipe Fittings Immediately Upstream of RCS Code Safety Valves Did Not Have Proper Inner Diameter.Caused by Min Pipe Specs for Valves Not Being Properly Stated on Interface Drawings (← links)
- 05000318/LER-1981-028, Forwards LER 81-028/01T-0 (← links)
- 05000318/LER-1989-022, :on 891227,core Alterations Performed W/Only One of Two Containment Vent Valves Closed,Violating Tech Specs.Caused by Procedural Deficiency.Surveillance Test Procedure Revised to Include Deleted Valves (← links)
- 05000318/LER-1981-009-03, /03L-0:on 810330,during Normal Power Operation, Motor Operated Isolation Valve in Saltwater Sys Would Not Operate Electrically.Caused by Tripped Overload Devices on Phase a & C.Devices Reset (← links)
- 05000318/LER-1981-009, Forwards LER 81-009/03L-0 (← links)
- 05000318/LER-1981-004-03, /03L-0:on 810204, While Conducting Preventive Maint,Shutdown Cooling Flow Lost.Caused by Procedure Not Containing Sufficient Info.Flow Lost Due to de-energized Vital Ac Bus Causing Valve to Shut.Procedure Revised (← links)
- 05000318/LER-1981-004, Forwards LER 81-004/03L-0 (← links)
- 05000318/LER-1981-006-03, /03L-0:on 810113 Diesel Generator 12 Switchgear Would Not Close in on 21 4-kV Bus Per Tech Spec.Caused by High Resistance at Secondary Disconnect.Continuity of Closing Circuit Interlocks Verified & Switchgear Tested (← links)
- 05000318/LER-1981-007, Forwards LER 81-007/03L-0 (← links)
- 05000318/LER-1981-006, Forwards LER 81-006/03L-0 (← links)
- 05000318/LER-1981-003-03, /03L-0:on 810123,shutdown Cooling Return Header Isolation valve,MOV-652,lost Valve Position Indication & Flow Was Stopped.Caused by Motor Control Center Power Transfer.Transfer Completed,Indication & Flow Restored (← links)
- 05000318/LER-1981-003, Forwards LER 81-003/03L-0 (← links)
- 05000318/LER-1981-001-03, /03L-0:on 810107,Channel B Reactor Protective Sys Trip Units for High Power,Thermal Margin/Low Pressure & Axial Flux Offset Bypassed for Troubleshooting Linear Power Range Instrument.Detector Output Faulty (← links)
- 05000318/LER-1981-001, Forwards LER 81-001/03L-0 (← links)
- 05000318/LER-1981-005-01, /01T-0:on 810118,w/reactor Coolant Sys at 220 F & 230 Psia,Presssure Transmitter Failed High,Causing Power Relief Valve RC-404-ERV to Open.Caused by Loose Oscillator/ Amplifier Assembly within Transmitter 2-PT-103-1 (← links)
- 05000318/LER-1981-005, Forwards LER 81-005/01T-0 (← links)
- 05000318/LER-1981-008-03, /03L-0:on 810113,steam Generator 22 Low Pressure Bistable Meter 2D Found Out of Calibr & Signal Isolator 2-E/E-1023A Failed.Caused by Natural Wear & Aging.Cause of Isolator Failure Not Stated (← links)
- 05000318/LER-1981-008, Forwards LER 81-008/03L-0 (← links)
- 05000318/LER-1980-055-03, /03L-0:on 801209,emergency Diesel Generator 12 Developed Fuel Oil Leak.Caused by Leak at Flared Type Brass Compression Fitting.Line Replaced (← links)
- 05000318/LER-1980-055, Forwards LER 80-055/03L-0 (← links)
- 05000318/LER-1980-053-03, /03L-0:on 801101 & 07,containment Atmosphere Particulate Monitor Failed.Caused by Loosened Channel Field Cable Leads Due to Improper Crimping.New Connectors Properly Installed (← links)
- 05000318/LER-1980-053, Forwards LER 80-053/03L-0 (← links)
- 05000318/LER-1981-010-03, /03L-0:on 810301,power-operated Relief Valve ERV-402 Failed to Seat Resulting in Valve Isolation.Caused by Insufficient Pressure in Sys While Filling Rcs.Pressure Raised & Valve Seated (← links)
- 05000318/LER-1981-010, Forwards LER 81-010/03L-0 (← links)
- 05000318/LER-1980-038-03, /03X-1:on 800818,while Reducing Power Due to Saltwater Leak,Steam Generator Blowdown Ph Dropped to 6.6, Below Tech Spec Limit of 7.5.Caused by Inadvertent Lab Technician Action.Affected Personnel Reinstructed (← links)
- 05000318/LER-1980-038, Forwards LER 80-038/03X-1 (← links)
- 05000318/LER-1980-037, Forwards LER 80-037/03L-0 (← links)
- 05000318/LER-1980-056-03, /03L-0:on 801116,control Element Assembly 1 Dropped Into Core.Cause Undetermined.Power Reduced to Less than 70% & Control Element Assembly Returned to Group Height (← links)
- 05000318/LER-1980-056, Forwards LER 80-056/03L-0 (← links)
- 05000318/LER-1980-051-03, /03L-0:on 801101,CTMT 21 Air Cooler Tripped Off. Caused by Terminal Shorting Block in Air Cooling Fan Controller Flashing Over,Causing Trip.No Cause of Flashover Determined.No Prevention Action Necessary (← links)
- 05000318/LER-1980-051, Forwards LER 80-051/03L-0 (← links)
- 05000318/LER-1980-050-03, /03L-0:on 801027,wide Range ex-core Nuclear Instrument Channel B Failed.Caused by Greater than or Equal to 15-volt Dc Power Supply Having Low Supply W/Ac Ripple. Power Supply Replaced (← links)
- 05000318/LER-1980-050, Forwards LER 80-050/03L-0 (← links)
- 05000318/LER-1980-046-03, /03L-0:on 801024,containment Pressure Signal to Reactor Protection Sys Channel a Found Out of Calibr in Nonconservative Direction.Caused by Output of Transmation Isolator 2-E/E-5313A Being 0.2 Vdc Low Over Range (← links)
- 05000318/LER-1980-046, Forwards LER 80-046/03L-0 (← links)
- 05000318/LER-1980-049-01, /01T-0:on 801106,buses 21 & 24 4kV Both Found Powered Off 500 Kv Red Bus for 13-h W/O Performance of Periodic Demonstration of Operability of Remaining Ac Sources Per Tech Specs.Caused by Operator Error (← links)
- 05000318/LER-1980-049, Forwards LER 80-049/01T-0 (← links)
- 05000318/LER-1980-048-03, /03L-0:on 801019,during Withdrawal of Control Element Assemblies to Control Axial Shape Index,Assemblies Dropped Into Core.Cause Unknown.Review of Control Element Assembly Drop Occurrences Is Underway (← links)
- 05000318/LER-1980-048, Forwards LER 80-048/03L-0 (← links)
- 05000318/LER-1980-020-03, /03L-0:on 800320,during Surveillance Testing, Channel D High Power Went Into Trip Condition.Malfunction Stopped Before Cause Could Be Determined (← links)
- 05000318/LER-1980-020, Forwards LER 80-020/03L-0 (← links)
- 05000318/LER-1980-054-03, /03L-0:on 801110,failure of SI-661-CV Caused 21A Safety Injection Tank Level to Decrease to Less than 187 Inches.Caused by Solenoid Valve 2-CV-661 Leak.Solenoid Valve (ASCO-NP8320A175V) Replaced W/Spare (← links)
- 05000318/LER-1980-054, Forwards LER 80-054/03L-0 (← links)
- 05000318/LER-1980-052-03, /03L-0:on 801103,CTMT Penetration Room Exhaust Fan Discharge Damper 22 Linkage Was Found Broken.Caused by Excessive Wear on Clevis Pin Due to Inadequate Lubrication. Linkage Repaired & Restored to Svc on 801104 (← links)
- 05000318/LER-1980-052, Forwards LER 80-052/03L-0 (← links)
- 05000318/LER-1980-057-03, /03L-0:on 801214,control Element Assembly 38 Dropped to Bottom of Core.Cause Undetermined.Control Element Assembly 38 Realigned W/Group (← links)
- 05000318/LER-1980-057, Forwards LER 80-057/03L-0 (← links)
- 05000318/LER-1981-002-03, /03L-0:on 810108,diesel Generator 12 Started Automatically.Possibly Caused by Control Relays in Abnormal State.Generator Reset & Tested (← links)
- 05000318/LER-1981-002, Forwards LER 81-002/03L-0 (← links)
- 05000318/LER-1980-045-03, /03L-0:on 801017,failure of CTMT Particulate Radioactivity Detector Discovered.Caused by Open Termination within Connector Assembly for Detector Due to Age & Handling.Open Lead Repaired (← links)
- 05000318/LER-1980-045, Forwards LER 80-045/03L-0 (← links)
- 05000318/LER-1980-047, Forwards LER 80-047/03L-0 (← links)
- 05000318/LER-1980-058, Forwards LER 80-058/01T-1 (← links)
- 05000318/LER-1980-058-03, /03L-0:on 801021,during Mode 1,control Room Air Conditioning Unit 12 Tripped.Air Temp Remained within Design Limit of 120 Degrees.Caused by Normal Temp Control Action. Proposed Mod Will Add Indications to Determine Trip Type (← links)
- 05000318/LER-1980-044-03, /03L-0:on 800926,engineered Safety Features Actuation Sys 22 Sgis Channel 2F Indicated Deviation of Greater than 0.1 Volts.Caused by Failure of Signal Isolator 2-E/E-1023C.Unit Replaced W/Spare (← links)
- 05000318/LER-1980-044, Forwards LER 80-044/03L-0 (← links)
- 05000318/LER-1980-043-03, /03L-0:on 800914,during Normal operation,22B Safety Injection Tank Level Indication Became Erratic.Cause Not Known.Bench Test Revealed No Malfunction.Level Transmitter Replaced,Recalibr & Returned to Svc (← links)
- 05000318/LER-1980-043, Forwards LER 80-043/03L-0 (← links)
- 05000318/LER-1980-040-03, /03L-0:on 800901,control Element Assembly 34 Dropped to Bottom of Core.Electrical Test Disclosed No Cause.Review of Rod Drop Occurrences Underway (← links)
- 05000318/LER-1980-040, Forwards LER 80-040/03L-0 (← links)
- 05000318/LER-1980-039-03, /03L-0L:on 800829,channel C Pressurizer Pressure High Trip Setpoint Discovered Out of Spec.Caused by Pressure Transmitter 2-PT-102C zero-shifting Low (← links)
- 05000318/LER-1980-039, Forwards LER 80-039/03L-0 (← links)
- 05000318/LER-1980-037-03, /03L-0:on 800818,while Reducing Power Due to Saltwater Leak,Steam Generator Blowdown Hydrogen Ion Concentrate Fell Below Tech Spec Limit.Caused by Failure to Notice Feed Line from Ammonia Tank to Manifold Was Shut Off (← links)
- 05000318/LER-1980-036-03, /03L-0:on 800729,engineered Safety Features Actuating Sys Channel Ze de-energized in Three Instances. Channel Ze de-energized While Troubleshooting. Meter Pointers to Defective Bistables Oscillated (← links)
- 05000318/LER-1980-036, Forwards LER 80-036/03L-0 (← links)
- 05000318/LER-1980-034-01, /01T-0:on 800727,while Operating at 100% Power for 4,days Unit Exceeded Tech Specs by 8 Mwt.Caused by Leak in Steam Generator Blowdown Recovery Heat Exchanger 21 Which Resulted in Calorimetric Power Calculation Error (← links)
- 05000318/LER-1980-034, Forwards LER 80-034/01T-0 (← links)
- 05000318/LER-1980-035, Forwards LER 80-035/01T-0 (← links)
- 05000318/LER-1980-033-03, /03L-0:on 800716,during Performance of Routine Test,Discovered Unidentified RCS Leakage Exceeding Tech Spec Limits.Caused by Packing Failure Due to Age.Pressurizer Spray Valve Bypass Valve Will Be Replaced (← links)
- 05000318/LER-1980-033, Forwards LER 80-033/03L-0 (← links)
- 05000318/LER-1980-032-01, /01T-0:on 800723,emergency Power Supply Removed from 21 Charging Pump While Redundant Pumps Inoperable Due to Maint.Caused by Operator Failure to Verify Which safety- Related Equipment Out of Svc.Instructions Changed (← links)
- 05000318/LER-1980-032, Forwards LER 80-032/01T-0 (← links)
- 05000318/LER-1979-075, Has Been Cancelled (← links)
- 05000318/LER-1980-008-03, /03L-0:on 800125,containment Spray Header 22 Was Isolated.Caused by Need to Repair Shutdown Heat Exchanger Inlet Cross Connect Valve.New Packing Installed (← links)
- 05000318/LER-1980-008, Forwards LER 80-008/03L-0 (← links)
- 05000318/LER-1989-002, :on 890228,discovered That Fire Barrier Penetration Inoperable & Action Statement Requirements Not Satisfied.Caused by Inadequate Administrative Controls. Penetration Returned to Operable Status (← links)
- 05000318/LER-1980-024-03, /03L-0:on 800417,during Containment Entry ,Leak in Middle Seal Instrument Line Flexible Hose Discovered.Cause Unknown.Failed Part Is Inside Containment Bldg & Is Still Radiologically Contaminated (← links)
- 05000318/LER-1980-024, Forwards LER 80-024/03L-0 (← links)
- 05000318/LER-1980-030-03, /03L-0:on 800517,containment Gaseous & Particulate Monitors Failed Due to Ground in Instrument Control Power. Caused by Water in Plant Page Unit.Monitor Pumps Bridged to Keep Pumps Running While Trouble Shooting Continued (← links)
- 05000317/LER-1979-078, Notifies That LER Number 50-317/79-78 Was Not Used for 1979 (← links)
- 05000317/LER-1979-003-03, /03L-0 on 790218:control Element Assembly 44 Cropped to Bottom of Core & Could Not Be Withdrawn.Reactor Power Reduced to Below 70%.Caused by Loose Connection on Terminal 21 of Coil Power Programmer.Connection Tightened (← links)
- 05000317/LER-1979-028-03, /03L-0 on 790724:while Operating Diesel Generator 11 for Troubleshooting,Smoke Was Noted Coming from Exciter Control Cabinet 1C61C.Caused by Grounded Primary Winding in Exciter Potential Transformer T-54 (← links)
- 05000317/LER-1979-028, Forwards LER 79-028/03L-0 (← links)
- 05000318/LER-1979-047-03, /03L-0:on 791204,while Performing post-refueling Low Power Physics Test,Average Temp Dropped Below Tech Specs.Caused by Operator & Erratic Control of Turbine Bypass Valves (← links)
- 05000318/LER-1979-047, Forwards LER 79-047/03L-0 (← links)
- 05000317/LER-1979-066-03, /03L-0:on 791120,containment Cooler 12 Taken Out of Svc to Repair Sticking Fan Motor Controller Handswitch. Cause Not Stated.Spring Tension on Switch Handle Adjusted (← links)
- 05000317/LER-1979-066, Forwards LER 79-066/03L-0 (← links)
- 05000317/LER-1979-018-04, /04T-0 on 790517:oyster Samples Showed Ag-110m at 88 Plus or Minus 5% Pci/Kg & Decreasing.May Be Caused by Depuration.No Corrective Action Required (← links)
- 05000317/LER-1979-018, Forwards LER 79-018/04T-0 (← links)
- 05000317/LER-1979-016-03, /03L-0 on 790421:one of Eight Main Steam Safety Valves Tested Found Out of Tolerence in Conservative Direction.Caused by Difference in Ambient Conditions Between Time When Valve Last Reset & Time of Test (← links)
- 05000317/LER-1979-016, Forwards LER 79-016/03L-0 (← links)
- 05000317/LER-1979-001, Forwards LER 79-001/01T-0 (← links)
- 05000318/LER-1979-004, Forwards LER 79-004/03L-0 (← links)
- 05000317/LER-1979-007-04, /04T-0 on 790228:sulfuric Acid Was Discharged Onto Ground Via Storm Drains Near Storage Tank.Caused by Pipe Weld Failure.Spill Isolated & Contained,Leak Located & Welded (← links)
- 05000317/LER-1979-007, Forwards LER 79-007/04T-0 (← links)
- 05000317/LER-1979-003, /03L-0 on 790218:azimuthal Power Tilt Exceeded Tech Spec Max.Caused by Dropped Control Element Assembly. Corrective Action Detailed in LER 79-003/03L-0 Unit 1 (← links)
- 05000317/LER-1979-005, Forwards LER 79-005/03L-0 (← links)
- 05000318/LER-1979-007-03, /03L-0 on 790212:snubber 2-83B-2,21 Main Steam Isolation Valve Hydraulic Supply Sys,Inoperable.Caused by Slightly Bent Piston Rod.Snubber Replaced (← links)
- 05000318/LER-1979-007, Forwards LER 79-007/03L-0 (← links)
- 05000318/LER-1979-006-03, /03L-0 on 790204:control Element Assembly Motion Inhibit Failed to Actuate within Tech Spec Limits.Caused by Bad K2 Relay on Relay Card.Relay Replaced & Inhibit Returned to Svc (← links)
- 05000318/LER-1979-006, Forwards LER 79-006/03L-0 (← links)
- 05000317/LER-1979-069-03, /03L-0:on 791127,during Steady State Operation, Diesel Generator 11 Was Removed Form Svc.Caused by Need to Repair Generator Fuel Oil Injector Supply Line.Line Replaced & Diesel Returned to Svc.Leak Marked for Future Ref (← links)
- 05000317/LER-1979-069, Forwards LER 79-069/03L-0 (← links)
- 05000317/LER-1979-027-03, /03L-0 on 790719:metrascope Position of Control Element Assemblies Was Lost.Caused by Faulty Metrascope Power Supply.Faulty Components Replaced,Setpoints Calibr & Alarms Cleared (← links)
- 05000317/LER-1979-027, Forwards LER 79-027/03L-0 (← links)
- 05000318/LER-1979-009-03, /03L-0 on 790226:svc Water Heat Exchanger Saltwater Outlet Throttle Valve 21 Failed to Open on Signal.Cause Unknown.Valve Will Be Repaired During Next Outage (← links)
- 05000318/LER-1979-009, Forwards LER 79-009/03L-0 (← links)
- 05000318/LER-1979-034-01, /01T-0:on 790914,noted That Air Start Sys Hangers Not Built to Meet Seismic Requirements.Caused by Error Classifying Lines as Nonseismic.Installation of Seismic Pipe Supports Upgraded Diesel Starting Air Sys (← links)
- 05000318/LER-1979-034, Forwards LER 79-034/01T-0 (← links)
- 05000317/LER-1979-015-03, /03L-0 on 790507:low Pressure Safety Injection Pump Stopped for 15 Minutes Due to Spurious Recirculation Actuation Signal.Caused by Voltage Transient.Test Procedures Revised (← links)
- 05000317/LER-1979-015, Forwards LER 79-015/03L-0 (← links)
- 05000318/LER-1979-001-03, /03L-0 on 790106:excessive Reactor Coolant Sys Unidentified Leakage.Caused by Cracked Weld on Socket Weld Downstream of Second Isolation Valve.Study Planned to Propose Design Changes to Correct Fatigue Problem (← links)
- 05000318/LER-1979-027-03, /031-0 on 790718:channel C Trips Were Received from Power Level,Thermal margin-low Pressure & Axial Flux Offset.Cause of Intermittent Problem Is Suspected to Be Loose Connection or Faulty Switch Circuit (← links)
- 05000317/LER-1979-025-03, /03L-0 on 790719:reactor Protection Sys Channel a T-cold Input Fluctuated.Cause Suspected to Be Intermittently Open Temp Element or Connection at Element. Repairs Implemented (← links)
- 05000317/LER-1979-025, Forwards LER 79-025/03L-0 (← links)
- 05000318/LER-1979-027, Forwards LER 79-027/03L-0 (← links)