Pages that link to "05000316/LER-2002-001, Containment Isolation Valve Alignment Error During Local Leak Rate Testing"
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The following pages link to 05000316/LER-2002-001, Containment Isolation Valve Alignment Error During Local Leak Rate Testing:
Displayed 14 items.
- 05000316/LER-2002-001 (redirect page) (← links)
- 05000316/LER-2010-002 (← links)
- 05000316/LER-2010-001 (← links)
- 05000315/LER-2002-004 (← links)
- 05000315/LER-2002-003 (← links)
- 05000316/LER-2001-004 (← links)
- 05000316/LER-2001-002 (← links)
- 05000316/LER-2001-001 (← links)
- 05000316/LER-1982-059, Forwards LER 82-059/03L-0 (← links)
- 05000316/LER-1982-051, Forwards LER 82-051/03L-0 (← links)
- 05000316/LER-1982-052, Forwards LER 82-052/03L-0 (← links)
- 05000316/LER-1982-048, Forwards LER 82-048/03L-0 (← links)
- 05000316/LER-1982-047, Forwards LER 82-047/03L-0 (← links)
- 05000316/LER-1982-046, Forwards LER 82-046/03L-0 (← links)
- 05000316/LER-1982-020, Updated LER 82-020/04T-0:on 820401,unplanned Gas Release Detected by Elevated Vent Stack Gaseous Monitor (R-26) Reading.Caused by Small Leak from Seal on East Centrifugal Charging Pump.Coolant Filter Changed (← links)
- 05000316/LER-1982-021, Forwards LER 82-021/03L-0 (← links)
- 05000316/LER-1982-019, Forwards LER 82-019/04T-0 (← links)
- 05000316/LER-1981-058, Forwards LER 81-058/03X-1 (← links)
- 05000316/LER-1982-043, Forwards LER 82-043/03L-0 (← links)
- 05000316/LER-1982-042, Forwards LER 82-042/03L-0 (← links)
- 05000316/LER-1982-041, Forwards LER 82-041/03L-0 (← links)
- 05000316/LER-1982-040, Forwards LER 82-040/01T-0 (← links)
- 05000316/LER-1982-039, Forwards LER 82-039/03L-0 (← links)
- 05000316/LER-1982-080, Forwards LER 82-080/03L-0 (← links)
- 05000316/LER-1982-076, Forwards LER 82-076/03L-0 (← links)
- 05000316/LER-1983-017, Forwards LER 83-017/03L-0 (← links)
- 05000316/LER-1982-109, Forwards LER 82-109/03L-0 (← links)
- 05000316/LER-1982-069, Forwards LER 82-069/03L-0 (← links)
- 05000316/LER-1982-068, Forwards LER 82-068/03L-0 (← links)
- 05000316/LER-1982-067, Forwards LER 82-067/03L-0 (← links)
- 05000316/LER-1982-050, Forwards LER 82-050/03L-0 (← links)
- 05000316/LER-1982-049, Forwards LER 82-049/03L-0 (← links)
- 05000316/LER-1982-058, Forwards LER 82-058/03L-0 (← links)
- 05000316/LER-1978-073, Forwards LER 78-073/03L-0 & LER 78-074/03L-0 (← links)
- 05000316/LER-1978-064, Forwards LER 78-064/03L-0 (← links)
- 05000316/LER-1982-055, Forwards LER 82-055/03L-0 (← links)
- 05000316/LER-1983-025, Forwards LER 83-025/03L-0 (← links)
- 05000316/LER-1983-018, Forwards LER 83-018/03L-0 (← links)
- 05000316/LER-1983-011, Forwards LER 83-011/03L-0 (← links)
- 05000316/LER-1983-015, Forwards LER 83-015/03L-0 & 83-016/03L-0 (← links)
- 05000316/LER-1982-116, Forwards LER 82-116/03L-0 & 82-117/01T-0.LERs Previously Submitted Using 1983 Numbers 83-001/03L-0 & 83-003/01T-0, Respectively (← links)
- 05000316/LER-1982-118, Forwards LER 82-118/03L-0 (← links)
- 05000316/LER-1982-095, Forwards LER 82-095/03L-0 (← links)
- 05000316/LER-1982-091, Forwards LER 82-091/03L-0 (← links)
- 05000316/LER-1981-065, Forwards LER 81-065/04L-0 (← links)
- 05000316/LER-1982-088, Forwards LER 82-088/03L-0 (← links)
- 05000316/LER-1982-085, Forwards LER 82-085/03L-0 (← links)
- 05000316/LER-1982-084, Forwards LER 82-084/03L-0 (← links)
- 05000316/LER-1982-083, Forwards LER 82-083/03L-0 (← links)
- 05000316/LER-1983-072, Forwards Updated LER 83-072/03X-1 & LER 83-094/03L-0 (← links)
- 05000316/LER-1982-016, Forwards Updated LER 82-016/03X-1 & LERs 83-121/03L-0 & 83-122/03L-0 (← links)
- 05000316/LER-1983-081, Updated LER 83-081/03X-1:on 830822 & 25,during Normal Operation,Reactor Trips Occurred as Result of Failures of 120-volt Ac Vital Bus Inverter.Caused by Operating Temps Above Rated Design Temps.Forced Air Cooling Installed (← links)
- 05000316/LER-1983-123, Forwards LER 83-123/03L-0 & LER 83-111/03X-1 (← links)
- 05000316/LER-1983-035, Forwards LER 83-035/03L-0 (← links)
- 05000316/LER-1983-040, Forwards LER 83-040/03L-0 (← links)
- 05000316/LER-1982-022, Requests LER 82-022/01T-0 Be Rescinded (← links)
- 05000316/LER-1983-034, Forwards LER 83-034/03L-0 (← links)
- 05000316/LER-1981-027, Forwards Updated LER 81-027/03X-2 (← links)
- 05000316/LER-1983-027, Forwards LER 83-027/03L-0 (← links)
- 05000316/LER-1983-022, Forwards LER 83-022/03L-0 (← links)
- 05000316/LER-1983-026, Forwards LER 83-026/01T-0 (← links)
- 05000316/LER-1982-096, Forwards LER 82-096/01T-0 (← links)
- 05000316/LER-1982-023, Forwards LER 82-023/03L-0 (← links)
- 05000316/LER-1982-093, Forwards Updated LER 82-093/03X-1 (← links)
- 05000316/LER-1985-043, Resubmitted LER 85-043-00:on 851227,auxiliary Bldg Ventilation Grab Sample Not Obtained within Tech Spec Time Constraints.Caused by Personnel Error.Administrative Action Taken W/Individual Involved (← links)
- 05000316/LER-1978-037, Forwards Revised LER 78-037/01T-1 Which Rescinds Commitment to Run Emergency Diesel Generator While Other Diesel Generator Being Removed from Operable Status.Change Will Reduce Number of Fast Cold Starts (← links)
- 05000316/LER-1983-039, Forwards LER 83-039/01T-0 (← links)
- 05000316/LER-1983-036, Forwards LER 83-036/01T-0 (← links)
- 05000316/LER-1982-064, Forwards Updated LER 82-064/03X-1 (← links)
- 05000316/LER-1982-113, Forwards Updated LER 82-113/01X-1 (← links)
- 05000316/LER-1982-106, Forwards Updated LER 82-106/03X-1 (← links)
- 05000316/LER-1950-316, Advises That Event Described in LER 50-316/86-25 Determined Not Reportable,Per Vendor Info & Engineering Evaluation. Raychron Replacement Timers Seismically Qualified for Use in Exide Battery Chargers.Ler Number Will Not Be Rei (← links)
- 05000316/LER-2024-002, Manual Reactor Trip Following Rapid Downpower for Steam Leak (← links)
- 05000316/LER-2024-003, Plant Shutdown Required by Technical Specifications Due to Reactor Coolant System Identified Leakage (← links)
- 05000316/LER-2024-002-01, Manual Reactor Trip Following Rapid Downpower for Steam Leak (← links)
- 05000316/LER-2024-001, Reactor Trip Due to Main Turbine Trip from a High-High Thrust Bearing Position Trip (← links)
- 05000316/LER-2022-001, Automatic Reactor Trip Due to Steam Generator High-High Level (← links)
- 05000316/LER-2024-004, AB Emergency Diesel Generator Inoperable for Longer than Allowed by Technical Specifications (← links)
- 05000316/LER-2021-002, Re Manual Reactor Trip Due to an Unisolable Steam Leak (← links)
- 05000316/LER-2020-004-01, Regarding Unit 2 Automatic Reactor Trip on Low-Low 24 Steam Generator Water Level (← links)
- 05000316/LER-2020-004, Automatic Reactor Trip on Low-Low 24 Steam Generator Water Level (← links)
- 05000316/LER-2020-003, Manual Reactor Trip and Automatic Safety Injection Due to Failed Open Pressurizer Spray Valve (← links)
- 05000316/LER-1986-027, :During 860802-29,backup Tritium Sample Sys Removed from Svc While Primary Sys Removed from Svc on 860806.Caused by Inadequate Procedural Guidance.Procedural Controls Adopted (← links)
- 05000316/LER-1986-025, :on 860912,determined That Replacement Timer Switches for 250 Volt Dc Battery Chargers Had Questionable Seismic Qualifications.Cause Unknown.Investigation Underway to Determine Why Seismic Concerns Not Addressed (← links)
- 05000316/LER-1986-021, :on 860707,during Troubleshooting of source- Range Nuclear Instrument N-32,spike on ESF Signal Occurred. Procedures Revised to Permit Bypassing Reactor Trip Function During Troubleshooting (← links)
- 05000316/LER-1986-022, :on 860710 & 11,two power-range Nuclear Instrumentation Ni Channels (N-41 & N-42) Inoperable Due to Personnel Failure to Properly Document & Control Drawing Error.Administrative Controls Strengthened (← links)
- 05000316/LER-1986-030, :on 861112-13,unit Operated W/One air-operated Containment Isolation Valve Inservice W/O Having Closing Time Determined After Packing Adjustment.Caused by Personnel Error.Leak Test Procedure Will Be Revised (← links)
- 05000316/LER-1986-028, :on 861001,rod Insertion Monitor Declared Inoperable When Computed Rod Insertion Limits Outside Tech Spec.Caused by Error in Calibr Procedure.Procedure Revised (← links)
- 05000316/LER-1986-017, :on 860506,contract Personnel Noticed Fire Seal W-9095 Had Foam Removed.Caused by Personnel Error.Fire Watch Posted & Fire Seal Repaired.Ltr Sent to All Dept Heads Re Maintaining Operable Fire Seals (← links)
- 05000316/LER-1986-006, :on 860225,ESF Actuation Occurred.Caused by Increased Activity Levels in Containment.High Alarm Set Points & Alert Alarm Setpoints Readjusted (← links)
- 05000316/LER-1998-004-01, :on 990422,determined That Ice Condenser Bypass Leakage Exceeds Design Basis Limit.Caused by Pressure Seal Required by Revised W Design Not Incorporated Into Aep Design.Numerous Matl Condition Walkdowns & Assessments Made (← links)
- 05000316/LER-1986-024, :on 860718,ESF Actuation Occurred Due to hi-hi Steam Generator Level.Caused by Failed Amplifier in Feedwater Flow Transmitter.Plant Procedures Implemented. Investigation Continuing (← links)
- 05000316/LER-1986-023, :on 860715 & 18,erroneous Accumulator Level Indication Resulted in Low Accumulator Vol.Caused by Instrumentation Failure.Diagnostic Testing of Instrumentation Planned for Mar 1987 Outage (← links)
- 05000316/LER-1986-018, :on 860509,partial Noncompliance W/Tech Spec 4.3.3.9.2 Surveillance Requirements for Steam Generator Blowdown Sys Discovered.Caused by Misinterpretation of Procedures.Procedures Revised (← links)
- 05000316/LER-1983-039-01, /01T-0:on 830408,potential for Violating RCS Temp Average Used in DNB Analysis Discovered During Proposed Tech Spec Review.Administrative Temp Average Limit of 575 F Imposed (← links)
- 05000316/LER-1983-036-01, /01T-0:on 830414,cable Vault Halon Sys Declared Inoperable After Failing to Meet Design Concentrations While Performing Nonroutine Test.Cause Not Determined.Review of Test Data & Testing Continuing (← links)
- 05000316/LER-1986-014, :on 860404,discovered That ESF Ventilation Sys HV-AES-1 Air Flow Rate Greater than Tech Spec Limit.Caused by Surveillance Procedure Deficiency.Procedure Will Be Revised to Include Addl Data (← links)
- 05000316/LER-1986-013, :on 860325,ESF Signal Generated During Test of Westinghouse solid-state Reactor Protection Sys.Caused by Personnel Error Due to Confusing Labeling of Logic Circuit Boards.Labels Clarified (← links)
- 05000316/LER-1986-020, :on 860623,during Surveillance Test Activities, Discovered That RCS Narrow Range Tavg Resistive Temp Detector Channel Functional Tests Not Conducted.Caused by Deficient Procedures.Temp Reduced (← links)
- 05000316/LER-1986-019, :on 860605,during Mode 5,fire Insp Missed on Inoperable Fire Door 470.Caused by Personnel Error.Action Initiated to Restore Identification Numbers to Appropriate Plant Door & Personnel Counseled (← links)
- 05000316/LER-1986-007, :on 860303,discovered That Safety Pins in Fire Door (Ieee/Dr) 314 Protecting Pressurizer Heater Transformer Room in Place W/No Personnel Present,Making Door Inoperable. Caused by Personnel Error.Procedures Reviewed (← links)
- 05000316/LER-1985-013, :on 850726,frost Accumulation in Excess of Tech Spec Found within Ice Condenser Flow Passages.Caused by Excessive Moisture in Air or Sublimation of Ice.Frost Buildup Removed on 850728 (← links)
- 05000316/LER-1986-016, :on 860429,in Mode 6 W/Core Unloaded,Esf & Reactor Trip Signals Received.Caused by Shorted Control Power Wires to power-range Nuclear Instrument Drawer.Insps of Electrical Connectors Conducted (← links)
- 05000316/LER-2020-002, Plant Shutdown Required by Technical Specifications Due to Reactor Coolant System Leakage (← links)
- 05000316/LER-1986-010, :on 860317,w/unit in Mode 5 (Cold Shutdown), Fire Seal F-6801 in Control Room Discovered Missing Approx 9 Square Inches of Sealing Foam.Cause Undetermined.Permanent Repair Completed on 860403 (← links)
- 05000316/LER-1986-008, :on 860311,ESF Reactor Trip Signal Received Due to Control Power Wires Pulling Free from power-range Nuclear Instrument Drawer & Shorting Out.Caused by Faulty Electrical Connector & Mislabeled Doors (← links)
- 05000316/LER-1986-004, :on 860129,defective Fire Penetration Discovered in Control Cable Vault.Caused by Silicone Seal Not Installed When Penetration Made.Fire Watch Posted & Permanent Seal Installed.Safety Evaluation Performed (← links)
- 05000316/LER-1986-003, :on 860207,ESF Actuation Occurred.Caused by High Alarm Signal.High Alarm Setpoint Set at Max Scale & Alert Alarm Setpoints Set to Correspond W/Current Radiological Conditions (← links)
- 05000316/LER-1985-041, :on 851211,high Alarm Received on Upper Containment Normal Range Area Monitor,Train B.Exact Cause unknown.DA-11 Gm Tubes Changed (← links)
- 05000316/LER-1985-040, :on 851205,high Alarm Received on Upper Containment normal-range Area Monitor,Train B.Exact Cause unknown.DA-11 Gm Tubes Changed on Recommendations of Mfg (← links)
- 05000316/LER-1985-033, :on 851023,lower Containment Airborne Monitor high-range Noble Gas Channel Gave Spurious High Alarm Signal.Caused by Software Errors Associated W/Eberline Software.Mfg Recommended 4 H Log Option Be Disabled (← links)
- 05000316/LER-1986-002, :on 860122,discovered That 4 H Surveillance Frequency Exceeded on Four Occasions Between 851023-26.Cause Attributed to Lack of Procedural Control.Procedural Requirements Implemented (← links)
- 05000316/LER-1986-001-01, :on 860117,flow Stopped for Continuous Tritium Sampling of Unit Vent Effluent.Caused by Sampling Line Blockage Due to Ice.Ice Removed & Tracing Repaired (← links)
- 05000316/LER-1978-060-03, /03L-0 on 780809:with Reactor Pwr at 97% Computer Failed to Printout All F Scans. Investgation Determined Cause to Be Apdms Computer (Encl to 7809190234) (← links)
- 05000316/LER-1978-059-03, /03L-1 on 780806:reactor Pwr Increased Above Admin Level of 91% & Tech Spec 4.2.6.1 Limit of 94% W/O Determining Axial Pwr Dist Factor Fz. Caused by Personnel Error. (Encl to 78809190234) (← links)
- 05000316/LER-1978-059, Forwards LER 78-059/03L-1 and 78-060/03L-0 (← links)
- 05000316/LER-1978-065-03, /03L-0 on 780901:viscosity of Diesel Lube Oil Was Low During Routine Check Due to Fuel Oil Contamination; for Fuel Oil Injection Pumps & 1 Fuel Injectors Were Replaced (← links)
- 05000316/LER-1978-066-03, /03L-0 on 780905:interlock on 650 Ft Level Containment Air Lock Failed to Function During Test, as Interlock Cable Was Too Loose to Operate Locking Mechanism. Tension Adjustment Was Added to Maintenance Prog (← links)
- 05000316/LER-1978-065, Forwards LER 78-065/03L-0 & 78-066/03L-0 (← links)
- 05000316/LER-1978-862-03, /03L-0 on 780613:during Mode 1 Oper AB Emergencey Diesel Generator Was Inoper from 2110 Hours on Available.Due to Defective Diodes.(Encl to (← links)
- 05000316/LER-1978-062, Forwards LER 78-062/03L-0 (← links)
- 05000316/LER-1978-063-03, /03L-0 on 780820:While Test Closing Turbine Valves at 99% Pwr,Steam Flow Was Reduced.Reactor Coolant Heated to 577F Degrees & Pressure Dropped to 2185 Psia Caused by Testing Valve at Too High Pwr Level (← links)
- 05000316/LER-1978-063, Forwards LER 78-063/03L-0 (← links)
- 05000316/LER-1978-061-03, /03L-0 on 780802:Rpts While in Hot Standby Above P-11,pressurizer Level Indication Channel 3 Found to Be Different from Other Channels.Caused by Gas Pocket in Sensing Line.(Encl to 7809190315) (← links)
- 05000316/LER-1978-056-03, /03L-0 on 780728:Rpts That Surveillance Test on 2AB Diesel Generator Resulted in Overspeed Trip as Generator Was Unloaded.Caused by Linkage Cap Screw Breaking in Governor Linkage.(Encl to 7809190315) (← links)
- 05000316/LER-1978-056, Forwards LER 78-056/03L-1 & 78-056/03L-0 (← links)
- 05000316/LER-1985-005, :on 850130,one Cell on Train AB Battery Had Unacceptable Specific Gravity Reading.Cell Replacement Completed & Cross Tie Breaker Opened Restoring Both Dc Bus Trains (← links)
- 05000316/LER-1985-043-01, :on 851227,auxiliary Bldg Ventilation Grab Sample Not Obtained within Time Restraints in Tech Spec 3.3.3.10,Table 3.3-13 Action Item 28.Caused by Personnel Error.Administrative Action Taken (← links)
- 05000316/LER-1985-029-01, :on 851010,during Mode 5,safety-related Fire Door 388 Found Inoperable Due to Loose Sequencer Arm Assembly Preventing Closure.Caused by Missing Screws on Mounting Plate.New Screws Staked (← links)
- 05000316/LER-1985-039-03, :on 851117,upper Containment normal-range Area Monitor Train a Alarmed High,Resulting in ESF Actuation.No Cause Found for Elevated Readings.Readings Returned to pre-event Range (← links)
- 05000316/LER-1985-038-01, :on 851110,ESF Actuation Occurred Due to Lower Containment Airborne Monitor Particulate Channel Train B High Alarm.Caused by Error in Inputing High Alarm Setpoint Exponent Value.Technician Counseled (← links)
- 05000316/LER-1982-003-01, /01X-1:on 820119,leak Discovered in Attachment Weld on Upstream Side of Suction Strainer for West Containment Spray Pump.Caused by Residual & High Cycle Alternating Stress.Design Change Initiated (← links)
- 05000316/LER-1985-014, :on 850728,w/unit in Mode 5,inadvertent Safety Injection Signal Generated During Installation of Design Change.Caused by Voltage Drop Resulting in Reduction of Power to Vital Instrument Buses III & IV (← links)
- 05000316/LER-1985-036-01, :on 851030,discovered Cardox Fire Protection Sys for Emergency Diesel Generator Room AB Isolated W/O Fire Watch Coverage.Caused by Personnel Error.Appropriate Administrative Action Taken W/Involved Personnel (← links)
- 05000316/LER-1985-035-01, :on 851029,reactor Trip Signal Received from RCS Low Flow & Reactor Trip Breaker a Failed to Open on Trip Signal.Trip Signal Caused by Momentary Dip in Output Voltage Due to Intermittent Short.Breaker Replaced (← links)
- 05000316/LER-1982-114-03, /03X-1:on 821223,during Refueling Operations,Door 411B Would Not Close to Latched Position.Caused by Open Cable Vault Hatch.Cable Vault Fans Reoriented from Four Exhausts to Two Intakes & Two Exhausts (← links)
- 05000316/LER-1985-042-01, :on 851223,failure of Gate Latching Mechanism Prevented Fire Watch Personnel from Completing Hourly Patrol of Charging Pump Rooms.Cause Not Determined.No Corrective or Preventive Action Taken (← links)
- 05000316/LER-1985-013-01, :on 850726,accumulation of Excessive Frost within Ice Condenser Flow Passages Discovered.Condition May Have Existed Prior to Cold Shutdown.Frost Buildup Removed on 850728.Investigation Underway (← links)
- 05000316/LER-1985-034-01, :on 851024 & 30,high Alarms Received on Lower Containment Airborne Particulate Radiation Monitor Train B, Resulting in ESF Actuation Signal.Caused by Monitor Trending Upward.Setpoints Readjusted (← links)
- 05000316/LER-1985-033-01, :on 851023,lower Containment Airborne Monitor high-range Noble Gas Channel Gave Spurious High Alarm Signal Resulting in ESF Actuation Signal.Caused by Software Errors. Errors Being Evaluated by Mfg (← links)
- 05000316/LER-1985-032-01, :on 851022,upper Containment Area Radiation Monitor Failed,Resulting in ESF Actuation Signal.Caused by Failure of Two Internal Electronic Modules.Failed Modules Replaced & Monitor Declared Operable (← links)
- 05000316/LER-1985-031-01, :on 851027,ESF Actuated as Result of Lower Containment Airborne Monitor Particulate Channel Train a High Alarm.Caused by Monitors Trending Upward.Setpoints Readjusted (← links)
- 05000316/LER-1985-041-01, :on 851211,at 81% Reactor Thermal Power,High Alarm Received on Upper Containment Normal Range Area Monitor,Train B After Instrument Failed Low.Investigation Into Cause Continuing (← links)
- 05000316/LER-1985-030-01, :on 851019,lower Containment Airborne Monitor Particulate Channel Trains a & B High Alarmed.Caused by Packing Leak in Reactor Temp Detector Bypass Loop Valve RC-111.Valve Repaired (← links)
- 05000316/LER-1985-040-01, :on 851205,ESF Actuation Signal Occurred After Alarm Received on Upper Containment normal-range Area Monitor Train B.Apparently Caused by Aging of DA-11 Gm Tubes in Monitor.Investigation Continuing (← links)
- 05000316/LER-1985-019-01, :on 850821,determined That Seismic Qualification of Governors for turbine-driven Auxiliary Feed Pumps Inadequate for Approx 4 Yrs.Cause Not Stated.Governors as Installed Meet Current Seismic Requirements (← links)
- 05000316/LER-1985-018-01, :on 850820,ESF Actuation Occurred.Caused by Opening of Reactor Trip Breakers During Instrumentation Checks.Surveillance Test Procedure Thp 4030 STP.180 Revised (← links)
- 05000316/LER-1985-021-01, :on 850822 & 23,discovered That Several Instrumentation Channel Functional Tests Not Performed as Required.Cause Not Stated.Testing Conducted (← links)
- 05000316/LER-1985-020-01, :on 850822,during Surveillance Testing, safety-related Fire Damper Found Inoperable.Cause Not Determined.Damper Repaired,Tested & Returned to Svc on 850823 (← links)
- 05000316/LER-1985-017-01, :on 850819 & 22,listed ESF Actuation Signals Received While Unit in Mode 3.Caused by Increasing Containment Radioactivity During Startup.Containment Purge Procedure Revised (← links)
- 05000316/LER-1985-016-01, :on 850808,flux Mapping Sys (Fms) Frame Assembly Restraint Devices Not Installed Per Design Specs. Installation of Restraint Devices & Mods Authorized by Design Changes (RFC-12-2778) Completed 850817 (← links)
- 05000316/LER-1985-015-01, :on 850803,ESF Actuation Occurred.Caused by Level Deviation Due to Excessive Leakage Through Loop 4 Auxiliary Feedwater Valve.Loop 4 Removed from Svc & Will Be Repaired Prior to Startup (← links)
- 05000316/LER-1985-014-01, :on 850728,during Replacement of Inverters, Safety Injection Signal Inadvertently Generated.Caused by Reactor Coolant Pump 3 Startup,Resulting in Momentary Power Reduction from Channels 3 & 4 (← links)
- 05000316/LER-1985-028-01, :on 850915,spray Additive Tank Vol Exceeded Tech Spec 3.6.2.2.Caused by Procedural Deficiencies.Tank Drained to Meet Specs & Returned to Operable Status (← links)
- 05000316/LER-1985-027-01, :on 850911,determined That Fire Rating of Wall Separating Unit 1 & 2 Essential Svc Water Pump Rooms Not Consistent W/App R Requirements.Caused by Open Penetrations. Fire Watch Established & Penetrations Sealed (← links)
- 05000316/LER-1984-032, :Between 841206 & 17,nine Events Occurred Involving Inability to Perform Hourly Insp of Inoperable Fire Assemblies.Caused by Coordination Problems W/ Implementation of Fire Watch Program (← links)
- 05000316/LER-1985-025-01, :on 850906,discovered That Reactor Trip Instrumentation Surveillance Requirements 4.3.1.1.1,Items 18B & 20 Inadequate.Cause Not Determined.Items Added to Computerized Nuclear Test Schedule for Reactor Startup (← links)
- 05000316/LER-1985-024-01, :on 850906,automatic ESF Actuation Occurred, Resulting in Reactor Trip Signal.Caused by Simultaneous Tripping of Two of Three Steam Generator 2 Level Channel Bistables.No Corrective Action Taken (← links)
- 05000316/LER-1985-026-01, :on 850903,discovered That Charcoal Absorber Banks Inadvertently Exposed to Fire Protection Water.On 850908,determined That Absorbers Possibly Incurred Damage. Caused by Spray Header Leakage (← links)
- 05000316/LER-1985-022-01, :on 850825,grab Sample of Essential Svc Water Sys Not Obtained at Proper Time.Caused by Technician Error. Technician Disciplined (← links)
- 05000316/LER-1985-023-01, :on 850823,discovered That Incorrect Essential Svc Water Sample Point Being Used to Fulfill Table 3.3-12 of Tech Spec 3.3.3.9.Procedure 12 Thp 6020 LAB.037 Revised to List Specific Sample Points (← links)
- 05000316/LER-1983-080-03, /03L-0:on 830817,during A/B Diesel Generator Operability Test,Generator Would Not Trip.Caused by Open Solenoid Valve Coil.Coil Replaced (← links)
- 05000316/LER-1985-012, :on 850603,while Process Radiation Monitoring Instrumentation Inoperable,Auxiliary Bldg Ventilation Grab Sample Not Obtained within Specified Time Restraints.Caused by Personnel Error.Technicians Counseled (← links)
- 05000316/LER-1978-037-01, /01T-1:on 780615,both Diesel Generators Placed in Condition Where Neither Engine Capable of Automatic Start. Operator Closed & Tagged Out Starting Air Pilot Valves on Wrong Diesel Generator.Operator Reprimanded (← links)
- 05000316/LER-1985-011-01, :on 850520,alarm Signals Received on Three Lower Containment Area Radiation Monitors Resulting in Containment Purge/Exhaust Isolation Signal (← links)
- 05000316/LER-1985-010, :on 850327,fire Watch Failed to Inspect 4 Kv Bus Room Ab.Caused by Personnel Error.Fire Watch Reinstructed Re Responsibility to Enter All Areas Assigned as Part of Fire Duties (← links)
- 05000316/LER-1985-009, :on 850327,monthly Vent Stack Composite Sample Lost During Isotopic Extraction Procedure.Caused by Error in Lab Technician Handling Technique.Personnel Counseled Re Handling Breakable Equipment (← links)
- 05000316/LER-1996-008, :on 960413,discovered Two Cam Follower Springs Broken on Unit 2CD Edg.Caused by Manufacturing Flaw.Replaced Springs,Cam Followers & Cover Plates.Also Reported Per Part 21 (← links)
- 05000316/LER-1985-008, :on 850103,broken Control Rod Guide Tube Support Pins Found in Steam Generators 22 & 23.Failure of Pin in Generator 22 Attributed to Igscc.Cause of Pin Failure in Generator 23 Undetermined (← links)
- 05000316/LER-1984-034-01, :on 841223,during Filling & Venting of RCS in Mode 5,automatic ESF Actuations Occurred.Caused by Leaking Loop 4 Resistant Temp Device Bypass Valve.Airborne Particulate Monitor Trip Functions Blocked (← links)
- 05000316/LER-1984-033-01, :on 841213,obstruction Discovered in Safeguards Ventilation Ductwork.Caused by Large Plastic Bag Positioned Against Turning Vanes.Obstruction Removed.Bldg Tour Procedures Modified (← links)
- 05000316/LER-1985-006-01, :on 850204,8-inch by 16-inch Opening Found in Wall in Quadrant 1 of Reactor Cable Tunnel,Constituting Inoperable Fire Barrier.Opening Believed to Have Existed Since Initial Plant Const.Opening Repaired (← links)
- 05000316/LER-1984-030, :on 841119,reactor Protection Sys Channel III Tripped.Caused by Inoperability of Loop 3 Steam Generator Feedwater Level Indication Due to Spurious Actuation.No Corrective Actions Planned (← links)
- 05000316/LER-1984-029, :on 841118,reactor Manually Tripped from Approx 73% Power.Caused by Partially Stuck Open Pressurizer Spray Valve.Valve Placed in Closed Position & Air Removed from Operator (← links)
- 05000316/LER-1985-003, :on 850126,while in Mode 1,reactor Tripped. Caused by Failure of Vital Bus III Inverter.Inverter Repaired.Accelerated Testing Program Implemented (← links)
- 05000316/LER-1985-002, :on 850112,automatic ESF Actuation Occurred, Resulting in Reactor Trip.Caused by lo-lo Level in Steam Generator 22 Due to Unexpected Increase in Steam Flow.Event Discussed W/Shift Personnel & Operating Memo Written (← links)
- 05000316/LER-1985-001-01, :on 850111,automatic ESF Actuation Occurred, Providing Start Signal to Motor Driven Auxiliary Feedwater Pumps.Caused by Personnel Error in Manual Control of Feedwater Regulator Valves (← links)
- 05000316/LER-1984-035-01, :on 841226,containment Insp Revealed body-to-bonnet Leakage on RCS Valve 2-RC-107 Loop 4.Caused by Carbon Steel body-to-bonnet Studs Severely Wasted Due to Corrosive Erosion.Studs Replaced (← links)
- 05000316/LER-1984-031, :on 841120,steam Line Isolation Occurred While Plant in Mode 3.Caused by Manual Activation of Feedwater/ Steam Flow Mismatch & Steamline High Flow Bistables for Testing Combined W/Actual lo-lo Average Temp Signal (← links)
- 05000316/LER-1984-019, :on 840710,one of Four Operating Reactor Coolant Pumps Removed from Svc Due to Pump Problems.Caused by Personnel Failure to Place Reactor Coolant Loop in Trip Position as Required by Tech Specs.Procedure Revised (← links)
- 05000316/LER-1985-007, :on 841228,NDE Revealed Cracks in Seven 2-inch Rockwell-Edward Globe Valves,Similar to IE Info Notice 84-48 & Suppl 1 Description.Valves Isolate Reactor Coolant Loop Resistance Temp Detector Manifolds (← links)
- 05000316/LER-1984-028, :on 841025,auxiliary Feedwater Sys Hydraulic Analysis Review Revealed Input Assumption Error for Feedwater Flow.Power Lowered to Reduce Decay Heat Equivalent to Decrease Auxiliary Feedwater Flow (← links)
- 05000316/LER-1985-004-01, :on 850125,RCS Loop 2 Cold Leg Temp Found Not Environmentally Qualified.On 850126,unit Trip Occurred. Caused by Unrelated Component Failure.Loop Replaced W/Qualified Spare (← links)
- 05000316/LER-1984-022, :on 840405,Cardox Fire Protection Sys on Cable Tunnel Discovered Isolated W/No Firewatch Present,Contrary to Tech Specs.Caused by Personnel Error.Administrative Changes Made to Avoid Future Errors (← links)
- 05000316/LER-1984-020, :on 840805,reactor Tripped Due to Loss of 120-volt Ac Vital Bus Inverter & Steam Generators 1 & 2 Flow Control Valves FMO-212 & 222 Did Not Operate Properly on Flow Retention Signal (← links)
- 05000316/LER-1984-021, :on 840807,discovered That Asterisks Allowing Operation of Upper Containment Grab Sample Valves Sm-8 & 10 Absent from Tech Specs.Caused by Inadequate Verification of Tech Specs.Change Requested (← links)
- 05000316/LER-1984-018, :on 840709,following Refueling Outage,Rpi for Rods B-8 & K-10 Misaligned.Caused by Variables Affecting Secondary Coil Stack Voltages.Unit Placed in Mode 3 (← links)
- 05000316/LER-1984-017, :on 840704,while in Mode 3,surveillance Requirements of Tech Spec 3.3.1.1 Not Performed as Required for intermediate-range ex-core Detectors Shiftly Channel Checks.Procedures Revised (← links)
- 05000316/LER-1984-026, :on 840821,control Room Cable Vault Supply Fan Fire Damper 2-HV-ACES-2 Closed But Not Latched.Caused by Clearance Between Latch Bolt & Housing Being Greater than Necessary.Personnel Reinstructed (← links)
- 05000316/LER-1984-027, :on 840928,cardox Fire Protection Sys on Auxiliary Cable Vault Found Isolated W/No Fire Watch Present.Caused by Personnel Error.Event Discussed W/Fire Watch Supervisors at Safety Meetings (← links)
- 05000316/LER-1984-023, :on 840829,fire Damper 2-HV-ACED-2 Inoperable During Manual Actuation of Low Pressure CO2 Fire Suppression Sys.Caused by pop-off Latch Caught on Protective Screen, Preventing Complete Closure of Damper (← links)
- 05000316/LER-1984-025, :on 840912,hi-hi Level in Steam Generator 2 Caused Operating Turbine Driven Main Feed Pump & Turbine to Trip.Caused by Operator Error & Level Control Problems.Event Discussed W/Appropriate Personnel (← links)
- 05000316/LER-1984-024, :on 840911,reactor Trip Occurred Due to Loss of 120-volt Ac Vital Bus Inverter.Caused by Shorted C2 Capacitor on Shorting Circuit Board.Failed C2 Capacitor Replaced (← links)
- 05000316/LER-1984-016, :on 840603,fire Seals 7091 & 7500 Discovered Inoperable W/O Firewatch Present.Apparent Cause Was Slight Movement of Fire Pipe During Installation.Continuous Firewatch Maintained & Seals Repaired (← links)
- 05000316/LER-1984-015, :on 840602,w/RCS in Mode 5,shutdown Margin Determination Surveillance Grace Period Exceeded.Caused by Personnel Error.Personnel Reinstructed.Sample Frequency Increased (← links)
- 05000316/LER-1984-014, :on 840521,w/unit in Cold Shutdown,Loss of RHR Pumps Occurred.Caused by Cavitation & Air Binding of Pumps. Procedure Changed to Include Instructions to Stop Operating Pump Prior to Starting Second Pump (← links)
- 05000316/LER-1984-013, :on 840516,scheduled 60-month Capacity Discharge Test Performed on Battery AB Indicated 71% Capacity,Not Meeting 80% Tech Spec Requirement.Battery Replaced & Undergoing Performance Testing (← links)
- 05000316/LER-1984-012, :on 840508,inadvertent Safety Injection Occurred During Load Shedding Surveillance Test on Train B Diesel Generator.Caused by Personnel Error & Procedural Deficiency.Load Shedding Procedure Modified (← links)
- 05000316/LER-1984-011, :on 840504,w/RCS in Mode 6,lower Containment Airborne Low Range Noble Gas Monitor Received Spurious High Alarm Causing Train a to Trip.Caused by Software Error. Manufacturer Notified.Resolution Under Evaluation (← links)
- 05000316/LER-1984-010, :on 840429 & 0501,automatic Actuation Occurred on Containment Ventilation Isolation Sys Train a When Air Particulate Radiation Monitoring Channel VRS-2301 Exceeded High Alarm Setpoint.Caused by Low Setpoint (← links)
- 05000316/LER-1984-009, :on 840410,Cardox Fire Protection Sys on Reactor Cable Tunnel Discovered Isolated W/No Firewatch. Caused by Firewatch & Security Officer Error in Not Checking Appropriate Switch in Normal Position (← links)
- 05000316/LER-1984-003-01, Updated LER 84-003-01:on 840311 & 17,upper Containment Area Radiation Monitor VRS-2201(IL) Received High Alarm.Caused by Equipment Malfunction Due to Software Problems.New Software Installed (← links)
- 05000316/LER-1984-003, :on 840311,upper Containment Area Radiation Monitor Received High Alarm,Resulting in Automatic Actuation of ESF Containment Isolation Sys.Caused by Equipment Malfunctions Possibly Due to Software Problems (← links)
- 05000316/LER-1984-002, :on 840218,turbine/reactor Trip Occurred from Full Power While Placing Moisture Separator Reheater Steam Coils in Svc.Caused by Operator Failing to Close Main Steam Supply Valves.Procedure Modified (← links)
- 05000316/LER-1983-094-03, /03L-0:on 830914,during Normal Operation,Loop 4 Steam Line Pressure Channel 2 Removed from Svc Because of Indications Instrument Line Obstructed.Cause Not Stated. Instrument Isolation Valve Bonnet Removed (← links)
- 05000316/LER-1983-095-01, /01T-0:on 831003,discovered That Radiation Monitor for Turbine Condenser Evacuation Sys Inoperable Due to Sample Pump Feed Breaker Tripping Open.Caused by Operator Failure to Recognize Monitor Failure Alarm (← links)
- 05000316/LER-1983-075-03, /03L-0:on 830808,air Leak Discovered on Steam Generator 3 Blowdown Sample Containment Isolation Valve (DCR-303).Caused by Defective O-ring on Piston & Base Plate Valve (← links)
- 05000316/LER-1984-007, :on 840411,12,16 & 20,high Alarm & Subsequent Trip of Containment Purge Received from Lower Containment low-range Noble Gas Radiation Monitor ERS-2405.Alternate Methodology for Calculating Under Way (← links)
- 05000316/LER-1983-122-03, /03L-0:on 831210,during Surveillance Test on ESF Fan 2-HV-AES-1,suspicious Odor Noted.Cause Undetermined. Coupling Reengaged & Screws Tightened (← links)
- 05000316/LER-1983-121-03, /03L-0:on 831209,Fire Door 472 in 4 Kv Room Found Occasionally Stuck in Full Open Position.Caused by Paint Buildup on Floor.High Spot Ground Down & Middle & Lower Door Hinges Shimmed (← links)
- 05000316/LER-1982-016-03, Pinhole Leak Discovered on Suction Strainer for West Containment Spray (CTS) Pump. Caused by Fatigue.Pinhole Removed by Grinding & Rewelding (← links)
- 05000316/LER-1983-115-03, /03L-0:on 831122,turbine & Reactor Trip Occurred at Approx 30% Power from Steam Generator high-high Level. Caused by Overfeeding Due to Feed Pump Leakoff Closure & Starting Hotwell Pump Due to Inadequate Main Feed Flow (← links)
- 05000316/LER-1983-116-03, /03L-0:on 831128,30 & 1202,lower Containment Outer Personnel Air Lock Door Exceeded Seal Leakage Limits.No Cause Indicated.Outer Door Seals Replaced & Adjustments Made to Door Frame Clamps (← links)
- 05000316/LER-1983-114-03, /03L-0:on 831118,carbon Dioxide Isolation Switch for Cable Penetration Tunnel Area Found in Isolated Position.No Personnel in Area.Responsible Person Not Identified.Design Change Pursued (← links)
- 05000316/LER-1983-120-03, /03L-0:on 831206,chart Paper for Containment Sump Flow Monitoring Recorder 2-CS-001 Would Not Advance.Cause Not Stated.Recorder Repaired.Design Change Submitted (← links)
- 05000316/LER-1983-117-03, /03L-0:on 831123,steam Generator 1 Blowdown Sample Isolation Valve DCR-301 Tripped Closed on High Alarm from Blowdown Radiation Monitor R-19.Caused by Leakage Due to Flat Spots on Two O-rings in Valve Actuator (← links)
- 05000316/LER-1983-119-03, /03L-0:on 831130,hydrogen Analyzer Could Not Be Calibr.Caused by Instrument Drift.Local Panel Meters Recalibr (← links)
- 05000316/LER-1983-118-03, /03L-0:on 831205,CD Battery Room Fire Door 461 Would Not Latch Properly.Caused by Burr on Strike Plate Interfering W/Latch & Lack of Adjustment.Burr Removed & Closure Adjusted (← links)
- 05000316/LER-1991-007-01, :on 910802,flow Path Identified Which Could Result in Diversion of Water Away from ECCS & Containment Bldg.Caused by Error in Eop.Eop Revised to Caution Operator to Establish Min Charging Flow (← links)
- 05000316/LER-1983-113-03, /03L-0:on 831117,abnormal Alarms for Diesel Generator Rooms Would Not Clear When Carbon Dioxide Switch for Diesel Generator Cd Returned to Normal.Caused by Failed Alison Control Temp Alarm Sys.Inverter Replaced (← links)
- 05000316/LER-1983-112-03, /03L-0:on 831116,during Operability Testing, Incomplete Start Received Following Maint on Diesel Generator Ab.Caused by Drift in Mechanical Zero on Voltage to Pressure Transducer.Mechanical Zero Readjusted (← links)
- 05000316/LER-1983-110-03, /03L-0:on 831108,breaker for Control Room Pressurization Sys Recirculation Damper Found Open.Cause Could Not Be Determined.Breaker Closed (← links)
- 05000316/LER-1983-108-01, /01T-0:on 831103,while Venting Vol Control Tank, Concentration for Oxygen & Hydrogen Exceeded 4% Limit.On 831118,gas Decay Tank 3 Discovered Not Suspended as Required (← links)
- 05000316/LER-1983-107-03, /03L-0:on 831105,emergency Diesel Generator Cd Removed from Svc to Repair Oil Leaks.Leaks Caused by Components Being Slightly Loosened by Vibration.Components Tightened (← links)
- 05000316/LER-1983-106-03, /03L-0:on 831105,analog Rod B-6 Control Bank B Pegged Low,W/Control Bank B Withdrawn to 228 Steps.Caused by Female Pins Pulling Back from Male Pins at Disconnector. Cable Repositioned to Eliminate Strain on Connector (← links)
- 05000316/LER-1983-105-03, /03L-0:on 831105,two Ice Condenser Intermediate Deck Doors Found Inoperable.Caused by Bracing Installed as Part of Design Change,Obstructing Doors.Bracing Modified (← links)
- 05000316/LER-1983-109-03, /03L-0:on 831106,miscellaneous Items Discovered Near Personnel Airlock in Upper Containment.Caused by Lack of sign-off to Verify Loose Debris Removed from Upper Containment.Procedure Revised (← links)
- 05000316/LER-1983-104-03, /03L-0:on 831104,Fire Door 388 to Quadrant 2 of Reactor Cable Tunnel Found Intermittently Unable to Latch. Caused by Bent Door Spindle,Apparently Due to Blow to Knob. Spindle Replaced (← links)
- 05000316/LER-1983-103-03, /03L-0:on 831024,letdown Isolation Valve QCR-301 Would Not Close within Specified Time.Caused by Boron Solidification in Stuffing Box Due to Minor Packing Leak. Boric Acid Removed & Packing Adjusted (← links)
- 05000316/LER-1983-102-03, /03L-0:on 831029,NESW from Lower Containment Ventilation Unit 3 Isolation Valve Failed to Meet Required Criterion of Closing within 10 S.Caused by Worn Insert in Solenoid Valve Mfg by Asco.Valve Rebuilt (← links)
- 05000316/LER-1983-101-03, /03L-0:on 831018,turbine Driven Auxiliary Feed Pump Trip & Throttle Valve Failed to Trip When Signal Initiated from Control Room.Caused by Rusted Stem Threads. Threads Cleaned & Lubricated.Valve Tested Satisfactorily (← links)
- 05000316/LER-1983-100-03, /03L-0:on 831016,east Motor Driven Auxiliary Feed Pump Tripped on Low Feed Pump Suction Pressure,Rendering Pump Inoperable.Caused by Mechanically Bound Stem Switch. Gauge Protector Replaced (← links)
- 05000316/LER-1983-099-03, /03L-0:on 831014,during Investigation of Fire Door 410,control Room Auxiliary Entrance,Electric Strike Found Broken,Rendering Door Inoperable.Cause Undetermined. Electric Strike Replaced (← links)
- 05000316/LER-1983-098-03, /03L-0:on 831003,operator Recorded Wrong Data for Containment Particulate Activity.Caused by Operator Misreading Column Readings.Crt Display Edited to Reduce Operation Confusion (← links)
- 05000316/LER-1983-097-03, /03L-0:on 830925,west Essential Svc Water Supply Header Isolation Valve WMO-706 Removed from Svc to Repair Electrical Ground.Caused by Wire Pinched by Operator Access Cover.Wire Repaired (← links)
- 05000316/LER-1983-096-03, /03L-0:on 830918,during Attempt to Rectify Order of Procedural Steps Re Containment Spray Surveillance Tests Concerning Lineup of Valve A,Water Drained to Containment. Caused by Personnel Error (← links)
- 05000316/LER-1983-086-03, /03L-0:on 830905,chart Paper on Containment Sump Flow Monitoring Recorder 1CS-001,would Not Advance.Cause Not Determined.Chart Paper Adjusted & Recorder Verified Operable.Design Change Submitted (← links)
- 05000316/LER-1983-085-03, /03L-0:on 830902,during Startup at 20% Power,After Turbine Generator Paralleled W/Sys Grid,Generator Load Increased to Prevent Motoring,Resulting in Pressure Drop Below Tech Specs.Caused by Heater Breaker Trip (← links)
- 05000316/LER-1983-084-03, /03L-0:on 830901,during Controlled Shutdown at Approx 10E-8 Power,T Average Decreased Below Tech Spec Min of 541 F.Cooldown Terminated at 535 F.Temp Would Not Return to 541 F within 15 Minutes.Reactor Trip Breakers Opened (← links)
- 05000316/LER-1984-001, :on 840117,boron Injection Tank Diluted by Primary Water After Equipment Clearance Permit Released & Sys Realigned.Caused by Open Untagged Valve.Individual Responsible for Restoration Forms Notified (← links)
- 05000316/LER-1983-068-03, /03L-0:on 830714,Fire Door 386 Between NESW Valve Gallery & Reactor Cable Tunnel Quad 2 Would Not Latch Properly.Caused by Bent Latch Plate.Latch Assembly Removed & Cleaned.Plate Straightened (← links)
- 05000316/LER-1983-067-03, /03L-0:on 830713,control Room Access Fire Door 411A Would Not Close.Caused by Bent Closerarm.Arm Straightened (← links)
- 05000316/LER-1983-066-03, /03L-0:on 830711,minor Air Leak Discovered at Exhaust Port of Fuel Rack Trip Cylinder Shuttle Valve on Diesel Generator Ab,Causing Generator to Be Removed from Svc.Cause Not Stated.Valve Replaced (← links)
- 05000316/LER-1983-126-99, /99L-0:on 831231,several Fire Hoses Discovered Not Inspected Per 3-yr Surveillance Test Frequency.Caused by Multiple Factors,Including Inadvertent Interchange of Hoses During Fire Drills (← links)
- 05000316/LER-1983-124-03, /03L-0:on 831224,during Surveillance Test of Power Range Drawer,Control Power Fuse Blew.Cause Not Determined. Power Range Drawer Recalibr (← links)
- 05000316/LER-1983-125-03, /03L-0:on 831229,output from Flux Penalty Module 2NY-441 Found Drifting in Conservative Direction.Cause Not Stated.Flux Penalty Module Calibr & Returned to Svc (← links)
- 05000316/LER-1983-052-03, During Normal Operation, Reactor Trip Occurred as Result of Failure in 120-volt Ac Vital Bus Inverter.Caused by Capacitor C-2 Failure Due to High Operating Temps.Capacitor & Fuse Replaced (← links)
- 05000316/LER-1983-123-03, /03L-0:on 831220,output from Bistable 2FB-512B Fluctuated at Trip & Reset Points.Cause Not Stated.Bistable Replaced (← links)
- 05000316/LER-1983-092-01, /01T-0:on 830926,during Routine Sampling of Boron Injection Tank,Sampling Valves at Tank Outlet Left Partially Open.Caused by Personnel Error.Appropriate Administrative Actions Taken Against Individual Involved (← links)
- 05000316/LER-1983-091-03, /03L-0:on 830906,pressurizer Pressure Dropped Below Tech Spec Limit.Caused by Combination of Individual Pressurizer Heater Circuit Breakers Tripping & High Valve Seat Leakage.Load Reduced (← links)
- 05000316/LER-1983-090-03, /03L-0:on 830920,during Surveillance Test on solid-state Protection Sys,Two Logic Positions Tested Unsatisfactorily.Caused by Defective Universal Card A-311. Logic Card Replaced (← links)
- 05000316/LER-1983-089-03, /03L-0:on 830915,west Containment Spray Pump Discharge Valve Position Lights Noted Out & Breaker Open. Cause Could Not Be Determined.No Corrective Action Planned (← links)
- 05000316/LER-1983-088-03, /03L-0:on 830912,nonfunctional Fire Seal Discovered.Caused by Fire Seal Pulled While Installing Another Cable.Fire Seal Repaired & Contractor Personnel Retrained (← links)
- 05000316/LER-1983-087-03, /03L-0:on 830904,pressurizer Level Channel 1 (NLP-151) Indication Drifted High.Caused by Water Leaking from Low Side Drain Valve on Pressurizer Cold Calibr Level Transmitter (NLI-151).Valve Tightened (← links)
- 05000316/LER-1983-083-03, /03L-0:on 830823,during Ice Condenser Lower Inlet Door Surveillance Test,Five Doors Exceeded Max Initial Opening Force Specs.Caused by Obstructions & Debris on Seals & Seating Surfaces.Procedure to Check Doors Modified (← links)
- 05000316/LER-1983-082-03, /03L-0:on 830826,during startup,body-to-bonnet Leak Reported on East Containment Spray HX Inlet Valve 2-CTS-121E.Cause Undetermined.East Train Removed from Svc to Repair Leak.Bonnet Gasket Replaced (← links)
- 05000316/LER-1983-081-03, /03L-0:on 830822 & 25,during Normal Operation, Reactor Trips Resulted from Failures of 120-volt Ac Vital Bus Inverter (Crid Ii).Caused by Operating Temps in Crid Being Above Design Temps.Forced Air Cooling Installed (← links)
- 05000316/LER-1983-079-03, /03L-0:on 830817,low Pressure Carbon Dioxide Fire Protection Sys Removed from Svc on Two Occasions to Repair Hose Reel Header Sys.Caused by Open Pilot Valve Solenoid Coil.Coil Replaced (← links)
- 05000316/LER-1983-078-03, /03L-0:on 830820,during Normal Operation,Air Leak Discovered at Exhaust Port of Fuel Rack Trip Cylinder Shuttle Valve on Diesel Generator Cd.Caused by Small Hole in Diaphragm of Quick Exhaust Valve (← links)
- 05000316/LER-1983-076-01, /01T-0:on 830830,discovered Leak on Nonessential Svc Water Header Supplying Reactor Coolant Pump Fire Protection Sys.Caused by Leaking Strainer Blowdown Connection Isolation Valve (← links)
- 05000316/LER-1983-073-01, /01T-0:on 830815,evaluation of Field Insp Findings Re safety-related Electrical Cabinets Revealed Battery Charges for Train AB Not Adequately Anchored.Caused by Nuts Not Being Installed.Nuts Installed (← links)
- 05000316/LER-1983-057-03, /03L-0:on 830624,stop Valve for Steam Generator 21 (2-MRV-210) Failed to Meet Tech Spec Closure Time.Cause Undetermined.Retest of Valve on 830709 Acceptable (← links)
- 05000316/LER-1983-056-03, /03L-0:on 830624,during Test on Ice Condenser Lower Inlet Doors,Bay 3 Door 3L Exceeded Max Torque Limit. Caused by Frame Seals Sticking to Door Due to Glycol Adherence.Seals Cleaned (← links)
- 05000316/LER-1983-055-01, /01T-0:on 830704,NESW Fire Protection Valve ZRV-13 Found Leaking Into Drain Line on HV-CFT-2,containment Auxiliary Charcoal Filter Fan 2.Caused by Sand Preventing Proper Valve Seating.Valve Cleaned (← links)
- 05000316/LER-1983-054-03, /03L-0:on 830623,during Normal Operations,Fire Door 386 Between Quad 2 & NESW Valve Gallery Failed to Latch Properly.Caused by Bent Latch Plate.Plate Removed, Straightened & Reinstalled (← links)
- 05000316/LER-1983-053-03, /03L-0:on 830520,during Surveillance Log Review, Containment Air Lock 3-day Door Tests Not Performed by Required Time.Caused by Personnel Misunderstanding.Test Immediately Performed Satisfactorily (← links)
- 05000316/LER-1983-077-01, /01T-0:on 830824,following Discussion W/Region Iii,Control Room Smoke Detectors Declared Inoperable.Caused by Difference in Interpretation of Testing Requirement. Smoke Detection Sys Test Initiated (← links)
- 05000316/LER-1983-050-01, /01T-0:on 830416,during Review of Sampling & Analysis Data for Waste Gas Sys Oxygen & Hydrogen concentrations,12 H Sampling Requirement Discovered Not Met. Caused by Personnel Error (← links)
- 05000316/LER-1983-070-03, /03L-0:on 830726,channel 2 Containment Pressure Indication Failed Low.Caused by Dirty Contacts in Toggle Switch Test Circuit.Toggle Switch Cleaned & Exercised (← links)
- 05000316/LER-1983-069-03, /03L-0:on 830718,east Component Cooling Water Pump Discharge Crosstie Valve CMO-412 Would Not Close Completely. Caused by Low Valve Operator Torque Switch Setting. Switch Adjusted (← links)
- 05000316/LER-1983-064-03, /03L-0:on 830717,computer P-250 Which Logs Axial Flux Difference Failed.Caused by Personnel Error.Personnel Counseled (← links)
- 05000316/LER-1983-063-03, /03L-0:on 830709,steam Generator 2 Stop Valve MRV-220 Drifted Off Open Detents.Cause Not Stated.Detents Spring Tension Adjusted (← links)
- 05000316/LER-1983-062-03, /03L-0:investigation Determined 830616 & 24 Events Re Control Room Cable Vault Fire Detection Instrumentation Reportable.Events Caused by Pyralarm Detectors Alarming W/ No Adverse Conditions.Fire Watch Established (← links)
- 05000316/LER-1983-065-03, /03L-0:on 830709,QC Dept Requested to Investigate Reason for Installation of Fire Barrier Spec Adding Listed Rooms as safety-related Zones (← links)
- 05000316/LER-1983-035-03, /03L-0:on 830312,during Surveillance Testing on Main Turbine Stop Valves,Reset Function for Proximity Switch on Stop Valve C Failed to Operate.Trip Function Made Inoperable for Replacement on 830319.Cause Unknown (← links)
- 05000316/LER-1983-040-03, /03L-0:on 830422,CCW West HX Outlet to Miscellaneous Svc Valves Failed to Operate within Inservice Insp (ISI) Time Limits.Caused by Infrequent ISI Testing. ISI Testing Frequency Increased from Quarterly to Monthly (← links)
- 05000316/LER-1983-034-03, /03L-0:on 830313,while on Routine Plant Tour, Security Guard Discovered Diesel Room Cardox Sys AB Isolated W/No One in Room.Caused by New Personnel Unfamiliar W/Procedures.Incident Discussed (← links)
- 05000316/LER-1983-033-03, /03L-0:on 830308,A Logic Test Position Tested Unsatisfactorily During Surveillance Test on Solid State Protection Sys Train B.Caused by Failure of Universal Card B-212.Logic Card Replaced (← links)
- 05000316/LER-1983-032-03, /03L-0:on 830304,outside Lower Containment Personnel Air Lock Door Found Open.Caused by Personnel Error.Tech Spec Requirements Discussed W/Involved Personnel (← links)
- 05000316/LER-1983-031-03, /03L-0:on 830225,reset Function for Proximity Switch on Stop Valve A,Train A,Failed to Reset Immediately. on 830304,proximity Switch Made Inoperable for Replacement. Cause Not Determined for Sluggish Reset Function (← links)
- 05000316/LER-1983-030-03, /03L-0:on 830304,floor Penetration F-6922 Fire Barrier Seal Found Degraded.Caused by Misinterpretation of Procedure Wording,Allowing 1 H for Posting Fire Watch to Replace Temporary Seals.Responsible Individual Retrained (← links)
- 05000316/LER-1983-029-03, /03L-0:on 830302,ESF Ventilation Sys Fan 2-HV-AES-2 Removed from Svc Due to Overheating Motor.Caused by Inboard Motor Bearing Failure.Motor Replaced (← links)
- 05000316/LER-1983-028-03, /03L-0:on 830302,security Officer Found Carbon Dioxide Sys Isolated W/No Personnel Present in Cd Diesel Room.Cause Not Stated.Responsible Operators Reinstructed Re Proper Methods of Entering Protected Area (← links)
- 05000316/LER-1981-027-03, Reactor Trip Occurred. Caused by Failed C-2 Capacitor & Blown Fuse.Fuse & Capacitor Replaced (← links)
- 05000316/LER-1983-027-03, /03L-0:on 830222,W Component Cooling Water HX Discharge Isolation Valve CMO-416 Would Not Close Completely & Trip Torque Switch.Caused by Limitorque Valve Operator Torque Switch Being Adjusted to Min Setting (← links)
- 05000316/LER-1983-048-01, /01T-0:on 830603,operators Inadvertantly Closed Manual Isolation Valve on HX of Nontested Train,Rendering Trains Inoperable.Caused by Personnel Error.Personnel Counseled (← links)
- 05000316/LER-1983-049-01, /01T-0:on 830602,pressure Gauge Discovered Missing from Outside Wall of Outer Air Lock Door in Upper Containment.Cause Under Investigation.Pressure Gauge Replaced (← links)
- 05000316/LER-1983-026-01, /01T-0:on 830224,containment Fire Detection Sys Surveillance Had Not Been Performed within Required Allowable Time.Caused by Personnel Error.Computer Scheduling Updated to Include All Control & Surveillance Tests (← links)
- 05000316/LER-1983-024-03, /03L-0:on 830203,during Normal Operation,Control Air to Containment Isolation Valve (XCR-100) Closed & Deactivated to Permit Troubleshooting on Possible Ground. Caused by Faulty Cable.New Cable Installed (← links)
- 05000316/LER-1983-023-03, /03L-0:on 830203,east Containment Spray Tank Discharge Isolation Valve CTS 128E Could Not Reopen After Surveillance Test.Caused by Galling Between Valve Stem & Yoke Bushing.Valve Stem & Yoke Bushing Cleaned & Lubricated (← links)
- 05000316/LER-1982-096-01, /01T-0:on 821201,west Centrifugal Charging Pump Rendered Inoperable by Incorrect Cut on Mini Flow Line from Pump.Caused by Poor Communication Between Plant & Contractor.Cut Locations Will Be Verified Prior to Work (← links)
- 05000316/LER-1983-046-03, /03L-0:on 830428,N-train Battery Room Pyroalarm Detector R-33A Alarmed,Rendering 633 Auxiliary Bldg Detectors Inoperable.Caused by Rain Leaking Through Roof Shorting Out Detector.Pyroalarm Terminal Block Replaced (← links)
- 05000316/LER-1983-047-03, /03L-0:on 830503,during Surveillance Test on Solid State Protection Sys Train B,Logic Test Position Tested Unsatisfactorily,Affecting Power Range High Flux Rate Trip. Caused by Failed Logic Card A-212.Card Replaced (← links)
- 05000316/LER-1983-045-03, /03L-0:on 830424,upper Containment Normal Range Area & Lower Containment Airborne Monitor Channels Declared Inoperable Due to Bad Data in Channel Parameter Files.Caused by Unverified Terminal Printouts (← links)
- 05000316/LER-1983-044-03, /03L-0:on 830421,20 Psig Difference Between Pressurizer Pressure Channels Existed.Caused by Pressure Transmitters for NPP-152 & 153 Drifting.Transmitters Satisfactorily Calibr (← links)
- 05000316/LER-1983-043-03, /03L-0:on 830425,review of Train a & B Lower Containment Airborne monitors,ERS-2300 & 2400,revealed Incorrect Wiring Per Approved Physical Prints.Monitors Removed from Svc & Corrections Made (← links)
- 05000316/LER-1982-023-03, /03L-0:on 820323,during Containment Spray Nozzle Air Flow Surveillance Test Three Spray Nozzles Found Obstructed.Caused by Duct Tape Over Two,W/Third Covered by Rubber Glove Held W/Tape.Obstructions Removed (← links)
- 05000316/LER-1982-022-01, /01T-0:on 820311,discovered Nonconformances to Amend 39 to Tech Specs Due to Receipt on 820327 W/Retroactive Effective Date of 820311.Operations Standing Order Issued Until Procedures Reflect Amended Tech Specs (← links)
- 05000316/LER-1983-042-03, /03L-0:on 830427,check Valve NS-262(CCW Seal Water to H2 Sampling Pumps) Found Leaking.Caused by Dirt Buildup on Valve Seating Surfaces.Valve Internals Cleaned.Seating Surfaces Checked (← links)
- 05000316/LER-1983-025-03, /03L-0:on 830203 & 05,fire Door 374 to Startup Blowdown Flash Tank Area Would Not Close Against Air Flow Through Door Opening.Door Closer Mechanism & Closer Arm & Screws Replaced.Door Closer Adjusted (← links)
- 05000316/LER-1982-093-03, Following Unit Shutdown, RCS Dose Equivalent I-131 Concentration Exceeded Tech Spec Limit.Cause Not Stated.Fuel Shipping Performed During Refueling Outage to Identify Potential Leaking Assemblies (← links)
- 05000316/LER-1983-021-03, /03L-0:on 830122,component Cooling Water West HX Outlet to Miscellaneous Svcs Valve (CMO-416) Failed to Operate within Inservice Insp Time Limitations.Cause Unknown.Valve Packing & Bushings Lubed & Exercised (← links)
- 05000316/LER-1983-020-03, /03L-0:on 830119,during Startup Operations,Steam Generator 2 Stop Valve MRV-220 Found W/One Pillar Guide Bearing Displaced.Cause Undetermined.Split Ring Retainers Fabricated & Tack Welded Into Position (← links)
- 05000316/LER-1983-019-03, /03L-0:on 830118,during Normal Operation,Auxiliary Cable Vault (Zone 11) Experienced Inadvertent Carbon Dioxide Discharge W/Detector Alarming.Caused by Moisture in Base. Moisture Removed & Sys Returned to Svc (← links)
- 05000316/LER-1983-003-03, /03L-0:on 830119,during Heatup,Pressurizer Pressure Channel I Indicated Approx 35 Psi Higher than Normal.Caused by Pressure Transmitter NPP-151 Calibr Drifting High by Approx 25 Psi.Transmitter Calibr (← links)
- 05000316/LER-1983-001-03, /03L-0:on 830122,during Overspeed Testing of Main Turbine,Centrifugal Overspeed Trip Device Failed to Operate at 110% & 112% Trip Points.Caused by Worn Area Between Governor Weight & Distance Ring.Rings & Weights Replaced (← links)
- 05000316/LER-1983-018-03, /03L-0:on 830117,lower Containment Gaseous & Particulate Radiation Monitors ERS-2301 & ERS-2305,failed. Caused by Loaded Particulate Filter Paper.Daily Filter Change Now Part of Routine for Shift (← links)
- 05000316/LER-1983-011-03, /03L-0:on 830108,pressurizer PORV NRV-152 Drifted Closed & NRV-153 Drifted Part Way Closed.Caused by Low Pressure on Outlet of Emergency Air Regulators.Regulators Adjusted & Evaluation of PORV Emergency Air Initiated (← links)
- 05000316/LER-1983-016-03, /03L-0:on 830113,several Valves Exhibited Excessive Leakage Causing Total Leak Rate to Exceed Limit. Caused by Dirt & Scale Deposits on Seating Surfaces & Erosion of Valve Seats.Valves Cleaned & Components Replaced (← links)
- 05000316/LER-1983-015-03, /03L-0:on 830113,contractor Personnel within Reactor Cable Tunnel Area W/O Required Number of Fire Watches.Area Vacated Until Proper Number of Fire Watches Established.Procedure Requirements Reviewed (← links)
- 05000316/LER-1983-010-03, /03L-0:on 830118,during Mode 3,auxiliary Cable Vault North Ventilation Damper Failed to Close Upon Carbon Dioxide Actuation.Caused by Loose Pilot Piping. Associated Pipe Hangers & Fittings Tightened (← links)
- 05000316/LER-1983-009-03, /03L-0:on 830117,during Unit Startup,Several Main Steam Safety Valves Found Leaking.Cause Not Stated.Gags Removed & Valves Declared Operable.Job Orders Written to Repair Valves During Next Outage of Sufficient Duration (← links)
- 05000316/LER-1983-008-03, /03L-0:on 830106,while in Operational Mode 5, Temporary Seal for Fire Barrier Penetration W-9391 to Cd Diesel Discovered Loose.Cause Not Determined.Temporary Seal Installed (← links)
- 05000316/LER-1983-007-03, /03L-0:on 830105,during Surveillance Test,Low Pressure Alarm XPA-152 for Emergency Air Supply Found to Be Actuating at Less than 900 Psig.Cause Not Stated.Design Change Submitted to Replace Mercoid Pressure Switch (← links)
- 05000316/LER-1983-006-03, /03L-0:on 830104,during Normal Operation of Unit 1 & Refueling of Unit 2,fire Door 388 in Quad 2 Would Not Fully Close.Caused by Ventilation Flow.Door Closure Mechanism Adjusted & Door Operated Satisfactorily (← links)
- 05000316/LER-1982-117-01, /01T-0:on 821222,five Relay Timers Exceeded Tolerance Allowed by Tech Spec.Caused by Instrument Drift. Timers Individually Retested.Two Timers Readjusted (← links)
- 05000316/LER-1982-116-03, /03L-0:on 821214,min Average Ice Weight of Sample Baskets from Radial Rows 7,8 & 9 Found Less than 1,220 Lb/ Basket at 95% Level of Confidence.Caused by Natural Sublimation.Ice Mass Added to Deficient Row Groups (← links)
- 05000316/LER-1982-118-03, /03L-0:on 821229,lower Containment Airborne Monitor ERS-2400 High Alarm Setpoint for Channel 2401 Left at Higher than Allowable Value During Functional Testing. Caused by Nonconservative Condition,Increasing Reading (← links)
- 05000316/LER-1982-095-03, /03L-0:on 821111,door to U-2 Cd Diesel Engine Fuel Oil Day Tank Room Designated as Tech Spec Related Fire Door Found Held Open.Cause Not Determined.Door Secured & Redesignated as nonsafety-related Fire Door (← links)
- 05000316/LER-1982-094-03, /03L-0:on 821122,during Mode 5 Operation,Rcs Temp Decreased Below Tech Spec Limit for Charging Pump Operation. Caused by Loss of Four Reactor Coolant Pumps & RHR Trains. Two of Three Pumps Racked Out (← links)
- 05000316/LER-1982-092-03, /03L-0:on 821109,during Normal Operation,Auxiliary Cable Vault (Zone 11) Experienced Inadvertent Carbon Dioxide Discharge & Pyralarm Detector Alarming.Caused by Water Entering Base.Detector & Base Replaced (← links)
- 05000316/LER-1982-091-03, /03L-0:on 821105,during Steam Generator Blowdown, Radiation Monitor R-19 Alarmed,Indicating Flow Continued Through Loop 1 Sample Valve DCR-301.Caused by Leakage Due to Valve Stroke Not Maintaining Positive Seat.Valve Replace (← links)
- 05000316/LER-1983-038-03, /03L-0:on 830405,four Logic Test Positions Tested Unsatisfactorily During solid-state Protection Sys (Train a) Surveillance Test.Caused by Failed Universal Card A-304. Logic Card Replaced.Sys Operability Verified (← links)
- 05000316/LER-1983-037-03, /03L-0:on 830323,Fire Door 386 Found Unlatched During Normal Operation.Caused by Insufficient Closer Mechanism Force.Door Closer Mechanism Adjusted (← links)
- 05000316/LER-1981-065-04, /04L-0:on 811127,extreme High delta-P Across Traveling Screens Was Discovered.Circulation Water Pump 24 Was Shut Down Causing Condenser delta-T to Rise Above Tech Spec Limits.Caused by Cladophora Accumulating on Screens (← links)
- 05000316/LER-1982-090-03, /03L-0:on 821026,stem Leakage Discovered at Valve CS-386 in Boric Acid Makeup Sys.Caused by Hole in Diaphragm of Itt Grinnell 2-inch Valve.Cause of Hole Unknown. Diaphragm Replaced & Flow Path Returned to Svc (← links)
- 05000316/LER-1982-089-03, /03L-0:on 821027,fire Damper 2-HV-ACES-1 Failed to Close During Automatic Actuation of Carbon Dioxide Fire Protection Sys in Auxiliary Cable Vault.Caused by Failure of Guillotine Door to Close Due to Dent in Door.Door Repair (← links)
- 05000316/LER-1982-088-03, /03L-0:on 821029,containment Sample Isolation Valve ECR-21 Would Not Cycle.Caused by Defective Solenoid Coil.Coil Replaced (← links)
- 05000316/LER-1982-085-03, /03L-0:on 821021,two Styluses on Containment Sump Level & Flow Monitoring Recorder Inoperable.Caused by Binding of Recorder Mechanism Causing Styluses to Remain in Slightly Raised Position (← links)
- 05000316/LER-1982-084-03, /03L-0:on 821012 & 15,isolation Switch for Low Pressure Carbon Dioxide Sys in Penetration Cable Tunnel, Quadrant 2,discovered in Isolate Position W/O Posted Continuous Fire Watch.Caused by Noncompliance W/Procedure (← links)
- 05000316/LER-1982-082-03, LER-082/03L-0:on 821007,during Test on Fire Protection Carbon Dioxide Sys,Weld Leak Developed on One Leg of 4-inch Tee Fitting.Caused by Defective Weld.Weld Repaired & Inspected (← links)
- 05000316/LER-1982-081-03, /03L-0:on 820930,during Operation,Leak Discovered on Drain Line for Main Feedwater to Number 1 Steam Generator.Caused by Slag Deposits.Weld Ground Out & Drain Line Replaced (← links)
- 05000316/LER-1982-079-03, /03L-0:on 820930,following Unit Shutdown RCS Dose Equivalent I-131 Concentration Exceeded steady-state Tech Spec Limit.Caused by Leaking Fuel Assemblies.Fuel Sipping Will Be Performed During Upcoming Refueling Outage (← links)
- 05000316/LER-1982-083-03, /03L-0:on 820930,MMO-240 Found to Have Steam Leak Through Packing.Cause undetermined.MMO-240 Backseated to Isolate Steam from Packing.Valve Repacked & Returned to Svc (← links)
- 05000316/LER-1982-080-03, /03L-0:on 820909,west Component Cooling Water HX Outlet Valve CMO-420 Removed from Svc Due to Leak.Caused by Elastomer Seat Being Pulled Loosed from Valve Body.Valves Returned to Manufacturer (← links)
- 05000316/LER-1982-076-03, /03L-0:on 820915,discovered Diesel Room AB Carbon Dioxide Sys Isolated W/No Personnel in Room.Cause Not Stated.Signs Posted Cautioning Personnel to Restore Carbon Dioxide Sys When Exiting.Administrative Action Taken (← links)
- 05000316/LER-1982-075-03, /03L-0:on 820824,following Reactor Trip,Rcs Dose Equivalent & I-131 Concentration Exceeded 1.0 Uci/G Steady State Limit.Caused by Inadvertent Removal from Svc of Chemical & Vol Control Sys Mixed Bed Demineralizer (← links)
- 05000316/LER-1982-072-03, /03L-0:on 820824,reactor Trip Occurred as Result of Failure in 120-volt Ac Vital Bus.Caused by Burned Out Resistor (R1) & Diode (D1) on Oscillator Board & Associated Fuse.Oscillator Board & Fuse Replaced (← links)
- 05000316/LER-1982-064-03, Loop 3 Overtemp Delta-T Trip Setpoint Found High.Caused by Setpoint Drift. New Module Installed,Calibr & Verified Operational.Loop Returned to Svc (← links)
- 05000316/LER-1982-074-03, /03L-0:on 820823,contractor Craftsman Failed to Return Carbon Dioxide Isolation Switch to Normal Upon Exiting Last Room,Rendering Fire Detection Sys Inoperable. Caused by Personnel Error.Sys Returned to Normal (← links)
- 05000316/LER-1982-073-03, /03L-0:on 820820,paper Drive Mechanism for Containment Air Particulate Sys Failed.Containment Gaseous Detector Declared Inoperable.Caused by Slipped Spool on Paper Takeup Reel.Spool & Paper Takeup Reel Realigned (← links)
- 05000316/LER-1983-017-03, /03L-0:on 830115,during Performance of RHR Sys Isolation Valve Test in Mode 4,RHR Cooldown Valve IMO-128 Closed Above Tech Spec Pressure.Caused by Inaccurate wide-range Indicator Readings (← links)
- 05000316/LER-1983-014-03, /03L-0:on 830124,steam Generator 3 Stop Valve Dump Valve MRV-232 Removed from Svc to Repair Seat Leakage.Caused by Need to Repair Valve.Valve Stem,Plug,Cage Seat Ring & Gaskets Replaced & Valve Returned to Svc (← links)
- 05000316/LER-1983-013-03, /03L-0:on 830122,steam Dump Sys Placed in Manual During Preparation for Main Turbine Overspeed Test,Causing RCS Temp to Drop Approx 2 F & Pressurizer Pressure to Drop to 2,180 Psig for Approx 1 Minute.Caused by Personnel Err (← links)
- 05000316/LER-1983-012-03, /03L-0:on 830126,exhaust Leak Identified on Expansion Joint on AB Diesel Engine Turbocharger Exhaust. Cause Undetermined.Expansion Joint Replaced.Similar Joints Inspected.No Defects Identified (← links)
- 05000316/LER-1982-106-03, During Surveillance testing,4 Kv Circuit Breaker 2C4 Found W/Inoperable anti- Pump Circuit.Caused by Malfunction of 250-volt Dc Control Device Due to Open Circuit on anti-pump Coil (← links)
- 05000316/LER-1982-109-03, /03L-0:on 821209,reactor Coolant Loop High Level Alarm Received.Investigation Showed That West RHR Pump Breaker Had Tripped.Cause Unknown.Pump Restarted (← links)
- 05000316/LER-1982-108-03, /03L-0:on 821216,during Testing on Diesel Generator Load Shedding relays,4-kV Bus Degraded Voltage Relays 27-T21A-1,27-T21D-2 & 27-T21D-3 Found Exceeding Tech Spec Limit.Caused by Instrument Drift.Relays Readjusted (← links)
- 05000316/LER-1982-107-03, /03L-0:on 821207,AB Diesel Generator Removed from Svc to Repair Small Fuel Oil Leak Resulting in Inability of Operable Charging Pump to Be Fed from Emergency Power Source.Cause Undetermined.Pump Fuel Line & Fitting Replaced (← links)
- 05000316/LER-1982-105-04, /04L-0:on 821204,following Sludge on Steam Generator 21,sludge Lance Lines Found Connected to East Blowdown Demineralizer,Releasing Unmonitored 200 Gallons. Procedures Misunderstood.Procedures Will Be Revised (← links)
- 05000316/LER-1982-104-03, /03L-0:on 821206,relay Timer Associated w/4 Kv Bus Degraded Voltage Exceeded Allowable Value of 2 Minutes & 6 by 3.1 S.Caused by Instrument Drift.Timer Adjusted (← links)
- 05000316/LER-1982-071-03, /03L-0:on 820809,during Outage,Operators Switched from West to East Centrifugal Charging Pump.Charging Pumps Shifted Prior to Removing AB Diesel Generator from Svc to Replace Diaphragm in Quick Exhaust Valve (← links)
- 05000316/LER-1982-070-03, /03L-0:on 820810,while Performing QA Tour of Auxiliary Bldg,Hole Noticed in Fire Seal W-7292,rendering Seal Nonfunctional.Cause Unknown.Seal Restored to Functional Status (← links)
- 05000316/LER-1982-069-03, /03L-0:on 820816,fire Door 374 Latch Discovered Inoperable During Cold Shutdown.Caused by Loose & Missing Screws.Screws Replaced,Tightened & Staked.Insp Procedure Changed to Require Staking of Screws in Doors & Hardware (← links)
- 05000316/LER-1982-068-03, /03L-0:on 820801,overpressure Protection Sys Channel Functional Test on Power Operated Relief Valve Actuation Channel Not Performed as Required.Caused by Personnel Error.New Procedure Approved (← links)
- 05000316/LER-1982-067-03, /03L-0:on 820801,following Unit Shutdown,Rcs Dose Equivalent I-131 Concentration Exceeded steady-state Limit of Tech Spec 3.4.8.Cause Not Stated.Fuel Burnup by Region & Addl Data Encl (← links)
- 05000316/LER-1982-065-03, /03L-0:on 820729,fire Door 388 to Quadrant 2 of Reactor Cable Tunnel Found Ajar & Would Not Latch Due to Bent Inactive Leaf Automatic Thrust Pins.Cause Not Determined.Pins Repaired (← links)
- 05000316/LER-1982-050-03, /03L-0:on 820601,outer Air Lock Door to Upper Containment Found Open.Possibly Caused by Ack of Remote Annunciator.Design Change to Move Door Unlatched Alarms Into Control Room Considered (← links)
- 05000316/LER-1982-049-03, /03L-0:on 820603,two Fire Doors Blocked Open & Unattended Contrary to Tech Specs.Caused by Welding Cables Left Unattended.Cables Removed.Training Conducted (← links)
- 05000316/LER-1982-063-03, /03L-0:on 820720,starting Time for 2-HV-CEQ-2 Fan Exceeded Tech Spec Tolerance.Caused by Instrument Repeatability Characteristics.Fan Retested Several Times within Allowable Limits (← links)
- 05000316/LER-1982-062-03, /03L-0:on 820719,carbon Dioxide Isolation Switch for Cd Diesel Generator Room Discovered in Isolate Position W/No Personnel in Area & No Fire Watch Posted.Caused by Personnel Error.Sys Returned to Normal (← links)
- 05000316/LER-1982-061-03, /03L-0:on 820717,while Performing Operability Test,Neither Fuel Oil Transfer Pump for Cd Emergency Diesel Generator Would Pump Fuel Oil to Day Tank.Caused by Failure of Nonoperating Pump Discharge Check Valve to Seat Properl (← links)
- 05000316/LER-1982-060-03, /03L-0:on 820717,during Normal Operation,Train a Heaters for Boron Injection Tank Declared Inoperable While Heater Controls Were Repaired.Caused by Faulty Resistance to Current Converter (R/I).Converter Replaced (← links)
- 05000316/LER-1978-088-03, /03L-0 on 781125:One RHR sub-sys Made Inoperable W/Reactor in Mode 2,less than 5% Pwr,Due to Assumption That Plant Was Still in Mode 1 at Greater That 5% Pwr.New Safety Sys Unit start-up Instructions Issued (← links)
- 05000316/LER-1978-084-03, /03L-0 on 781101:rod H-8 Rod Position Remained at 220 Steps After Control Bank D Position Reduced from 220 to 207 Steps.Caused by Drift for H-8 Signal Conditioning Module.Was Reset to Correct Position (← links)
- 05000316/LER-1982-058-03, /03L-0:on 820629,carbon Dioxide Sys Forquadrant 2 Reactor Cable Tunnel Area Was Isolated & Fire Door Blocked Open W/O Fire Watch Posted.Compliance W/Fire Protection Requirements Emphasized (← links)
- 05000316/LER-1978-073-03, /03L-0:on 780922,automatic Control Adjustment Experienced Pressure Reduction Below Tech Spec Limits.Caused by Misinterpretation of Calibr Procedure.Valve Closed & Pressure Returned to Normal (← links)
- 05000316/LER-1978-064-03, /03L-0:on 780905,rod Position Indication for Rod C-9 Showed Deviation of Greater That 12 Steps from Demand Position.Caused by Drift of Signal Conditioning Module. Module Recalibr (← links)
- 05000316/LER-1990-007, :on 900717,accumulated Leakage Found While Performing Type B & C Leak Rate Tests on Containment Penetrations Exceeded Tech Spec 3.6.1.2.b.Caused by Degradation of Isolation Valve Seating Svcs (← links)
- 05000316/LER-1982-055-03, /03L-0:on 820628,during Normal Operation,Train B Bit Heaters Discovered W/Thermal Overload Tripped & Declared Inoperable.Caused by Shorted Chromalox TH-18 Heater.Heater Replaced & Train Declared Operable.Reason for Short Unk (← links)
- 05000316/LER-1982-053-03, /03L-0:on 820621,operator Discovered Safety Stop Pins in Tracks of Door 314,pressurizer Heaters Transformer Room Overhead Door.Caused by Irresponsible Individual.Pins Removed Immediately (← links)
- 05000316/LER-1982-059-03, /03L-0:on 820709,flowpath from Boric Acid Tanks Via Boric Acid Transfer & Charging Pumps to RCS Isolated for 38 Minutes to Repair Leaking Isolation Valve CS-485.Caused by Diaphragm Failure.Valve Diaphragm & Bonnet Replaced (← links)
- 05000316/LER-1982-051-03, /03L-0:on 820622,double Resilient Seals on Ring Body Flange & Lock Cover Flange Discovered Not Type B Leak Rate Tested.Caused by Seals Not Being Included in Existing Surveillance Procedure (← links)
- 05000316/LER-1982-052-03, /03L-0:on 820611,work Bench Found Obstructing Path for Rollup Fire Door Between Two 600-volt Switchgear Areas. Personnel Responsible Not Located.Work Bench Removed.Video Film Being Prepared to Increase Awareness of Requireme (← links)
- 05000316/LER-1982-048-03, /03L-0:on 820524,safety Stop Pin in Track of Pressurizer Heater Transformer Room Overhead Door Discovered.Caused by Personnel Error.Pin Removed.Ltr Sent to All Personnel Re Proper Use of Pins (← links)
- 05000316/LER-1982-047-03, /03L-0:on 820603,insp Revealed That Installation of Valve Control 2-ABV-A Did Not Conform to Design Drawing. Caused by Inadequate Installation During Const.Emergency Mod Initiated (← links)
- 05000316/LER-1982-046-03, /03L-0:on 820520,west Centrifugal Charging Pump Removed from Svc to Repair Leaking 1/2-inch Threaded Seal Water Line Elbow at Inboard Mechanical Seal Hx.Cause of Leak Undetermined.Fitting Removed & Threads Cleaned (← links)
- 05000316/LER-1982-045-03, /03L-0:on 820513,during Normal Operation,Operator Noted Fire Door 461 Would Not Latch Properly Due to Loose Latch Cover.Caused by Screws Used to Secure Cover in Place Falling Out.New Screws Installed (← links)
- 05000316/LER-1982-044-03, /03L-0:on 820512,during Surveillance Testing,Loss of Bistable FB-445A Setpoint for Loop 4 Reactor Coolant Detected.Caused by Instrument Setpoint Drift.Model 63U-AC-OHAAF Replaced,Calibr & Returned to Svc (← links)
- 05000316/LER-1982-021-03, /03L-0:on 820315,while in Mode 5,surveillance Testing of ESF Ventilation Sys Filter Train (HV-AES-2) Revealed One HEPA Filter Did Not Meet Air Flow Distribution Criteria.New Filters Installed (← links)
- 05000316/LER-1982-019-04, /04T-0:on 820401,unplanned Gas Release Detected by Elevated Unit 2 Vent Stack Gaseous Monitor Reading. Event Continued for Several Days.Total of 118 Ci Xe-133 Released.Caused by Seal Leak on Centrifugal Pump (← links)
- 05000316/LER-1982-019-03, /03L-0:on 820311,following Shutdown,Containment Air Particulate & Gaseous Radiation Monitoring Sys R-11 & R-12 Sample Pump Tripped on Low Flow.Cause Undetermined. Flow Adjusted to Correct Level of 10 Scfm (← links)
- 05000316/LER-1982-043-03, /03L-0:on 820506,operator on Tour Noted Fire Barrier Door 388 Would Not Latch Properly When Closed by Door Closure.Apparently Caused by Normal Usage.Latch Lubricated & Reinstalled.Door Adjusted (← links)
- 05000316/LER-1982-042-03, /03L-0:on 820428,low Pressure Alarm XPA-153 for Emergency Air Supply to NRV-153 Actuated at 628 Psig.Cause Not Stated.Setpoint re-evaluated (← links)
- 05000316/LER-1982-041-03, /03L-0:on 820427,during Surveillance Testing,Axial Power Distribution Monitoring Sys Detector B F(2) Limit Setpoints Was Incorrect.Caused by Use of Incorrect Data During Test Performance.Procedures Revised (← links)
- 05000316/LER-1982-040-01, /01T-0:on 820511,during Design Change Review, Piping at Containment Air Sampling Penetrations Discovered Overstressed Due to Addition of Padlocks & Chains.Padlocks & Chains Replaced W/Lightweight Seals (← links)
- 05000316/LER-1982-039-03, /03L-0:on 820424,low Flow Alarm Would Not Clear After Containment Air Particulate & Gaseous Radiation Monitor Sys (R-11/R-12) Sample Pump Stopped to Perform Required Sampling.Pump & Flowmeter Replaced (← links)
- 05000316/LER-1982-038-03, /03L-0:on 820420,steam Generator 3 Stop Valve Dump Valve MRV-232 Removed from Svc to Repair Seat Leakage, Leading to Valve in Less Conservative Configuration than Tech Spec Reqquirement.Seat Ring Replaced (← links)
- 05000316/LER-1979-031, Forwards Updated LER 79-031/03X-1 & LER 82-038/03L-0 (← links)
- 05000316/LER-1982-037-03, /03L-0:on 820423,while Establishing Clearance to Repair Valve,Flow Path from Boric Acid Tanks to Charging Pumps Suction Removed from Svc.Caused by Failed Diaphragm on Filter Isolation Valve.New Diaphragm Installed (← links)
- 05000316/LER-1982-036-03, /03L-0:on 820422,flow Path from Bast to RCS Isolated in Order to Unplug Bast Recirculation Line.Caused by Repair to Boric Acid Recirculation Line Due to Pluggage. Line Unplugged & Flow Path Restored (← links)
- 05000316/LER-1982-035-03, /03L-0:on 820413,flow Path from Boric Acid Transfer Pumps to Charging Pump Suction Isolated to Enable Repairs on Flow Instrument Isolation Valve Cs-486.Valve Leak Caused by Diaphragm Failure.Diaphragm Replaced (← links)
- 05000316/LER-1982-034-03, /03L-0:on 820412,during Normal Operation,Test of Control Room Emergency Ventilation Sys Found That Air Flow Was 7,370 Cfm for 2-ACRF-1.Caused by Lack of Procedure to Verify Airflow After Prefilter Changes.Procedure Modified (← links)
- 05000316/LER-1982-034, Forwards LER 82-034/03L-0 (← links)
- 05000316/LER-1982-033-03, /03L-0:on 820412,west Centrifugal Charging Pump Removed from Svc to Repair Sticking Check Valve T14 in Auxiliary Oil Pump Discharge Line.Sticking Caused by Bent Guide Finger.Guide Finger Straightened (← links)
- 05000316/LER-1982-033, Forwards LER 82-033/03L-0 (← links)
- 05000316/LER-1982-031-03, /03L-0:on 820330,during Preventive Maint Insp,Roll Up Fire Door 314 Would Not Close Upon Automatic Closure Activation.Caused by Adjusting Wheel Rivets Missing from Automatic Closure Mechanism.Discharge Spring Adjusted (← links)
- 05000316/LER-1982-030-03, /03L-0:on 820401,both Steam Generator 1 Stop Valve Dump Valves Were Isolated at Same Time.Caused by Incorrect Orientation of Selector Valve MMO-210 During Initial installation.MMO-210 Will Be Reinstalled (← links)
- 05000316/LER-1982-029-03, /03L-0:on 820330,during Startup,Steam Generator 3 Stop Valve MRV-230 Pillar Stem Wipers Found Displaced from Bearing Assemblies.Caused by Nonparallel Alignment of Pillars.Split Ring Retainers Fabricated & Welded (← links)
- 05000316/LER-1982-028-04, /04L-0:on 820404,flow Indicator SFR-201 for Turbine Gland Seal Leakoff Failed High.Caused by Excessive Moisture on Sensing Element.Moisture Removed,Probe Reinstalled & Indicator Returned to Svc (← links)
- 05000316/LER-1982-028, Forwards LER 82-028/04L-0 (← links)
- 05000316/LER-1982-032-03, /03L-0:on 820402,east Central Charging Pump Isolated on Two Occasions.Caused by Repair Effort to Locate Source of Airborne Radioactivity in Auxiliary Bldg.Partially Caused by Pump Inboard Mechanical Seal Leak (← links)
- 05000316/LER-1982-032, Forwards LER 82-032/03L-0 (← links)
- 05000316/LER-1982-027-03, /03L-0:on 820330,w/RCS in Mode 3,containment Air Particulate & Gaseous Radiation Monitoring Sys (R-11/R-12) Sample Pump Tripped on Low Flow.Apparently Caused by Wearing in or Seating of Sample Pump Carbon Vanes (← links)
- 05000316/LER-1982-026-03, /03L-0:on 820401,during Return to 100% Power Following Outage,West Feed Pump Turbine Tripped Requiring Rapid Power Reduction Causing Pressurizer Pressure to Drop Below Tech Spec Requirements (← links)
- 05000316/LER-1982-025-03, /03L-0:on 820326,min Average Ice Weight of Sample Baskets from Radial Rows 8 & 9 Group 2 Found to Be Less than 1,220 Lb/Basket at 95% Level of Confidence.Caused by Migration of Ice Mass Away from Crane Wall.Ice Mass Added (← links)
- 05000316/LER-1982-024-03, /03L-0:on 820325,roll-up Fire Door 344 Would Not Close Upon Automatic Closure Activation.Caused by Discharge Spring Torquing Mechanism Being Assembled W/Oversized Traveling Link.Spiral & Traveling Link Replaced (← links)
- 05000316/LER-1982-018-03, /03L-0:on 820311,following Shutdown,Rcs Dose Equivalent I-131 Concentration Exceeded Steady State Tech Spec Limit Until 820312.No Cause Given.Iodine Behavior Under Transient Conditions Consistent w/WCAP-8637 (← links)
- 05000316/LER-1982-018, Forwards LER 82-018/03L-0 (← links)
- 05000316/LER-1982-017-03, /03L-0:on 820223,during Rollup of Main Turbine in Preparation for Placing Unit in Svc,Pressurizer Pressure Decreased Below Tech Spec Limit.Caused by Unexpected Decrease in Condenser Vacuum (← links)
- 05000316/LER-1982-017, Forwards LER 82-017/03L-0 (← links)
- 05000316/LER-1982-014-03, /03L-0:on 820217,radiation Monitors R-11 & R-12 Sample Pump Would Not Develop Sufficient Flow During Normal Operation.Cause Not Stated.Entire Radiation Monitor Sys Scheduled for Replacement by 30 Days After 1982 Refueling (← links)
- 05000316/LER-1982-014, Forwards LER 82-014/03L-0 (← links)
- 05000316/LER-1982-015-04, /04L-0:on 820222,flow Indicator SFR-201 for Turbine Gland Seal Leakoff Failed Low.Probably Caused by Moisture in Sys.Replacement Probes Found Calibr to Incorrect Range.New Sys to Be Installed (← links)
- 05000316/LER-1982-015, Forwards LER 82-015/04L-0 (← links)
- 05000316/LER-1982-013-03, /03L-0:on 820222,following Reactor Trip,Rcs Dose Equivalent I-131 Concentration Exceeded Tech Spec Limit. Caused by I-131 Concentration Spiking to Max of 2.33 Uci/G. Unit Returned to Operation & Iodine Values Leveled (← links)
- 05000316/LER-1982-013, Forwards LER 82-013/03L-0 (← links)
- 05000316/LER-1981-067, Forwards Updated LER 81-067/03X-1 (← links)
- 05000316/LER-1982-012-03, /03L-0:on 820224,boron Injection Tank Inlet Valve Breaker Found in Off Position.Probably Caused by Accidental Bump by Personnel Using Area as Shortcut.Area Will Be Blocked Off to Prevent Passage (← links)
- 05000316/LER-1982-012, Forwards LER 82-012/03L-0 (← links)
- 05000316/LER-1982-011-03, /03L-0:on 820128,leak Discovered in Essential Svc Water Pipe Downstream of Outlet Valve from East Component Cooling Water Heat Exchanger.Caused by Cavitation Due to Throttling of Butterfly Valve.Mod Initiated (← links)
- 05000316/LER-1982-011, Forwards LER 82-011/03L-0 (← links)
- 05000316/LER-1982-010-03, /03L-0:on 820122,during Surveillance Test,Valve 2-CO-420,W Component Cooling Water HX Discharge Would Not Close Remotely.Caused by Binding of Valve Shaft in Stuffing Box Bore Below Packing & in Area of Upper Shaft Bushing (← links)
- 05000316/LER-1982-009-03, /03L-0:on 820122,during Normal Operation,Mounting Bracket for Turbine Stop Valve D,Train a Proximity Switch Discovered Broken.Caused by Excessive Vibration.Bracket Repaired & Switch Remounted (← links)
- 05000316/LER-1982-007-03, /03L-0:on 820122,during Surveillance Test,Valve 2-CMO-429,component Cooling Water Discharge from W RHR HX, Failed to Close.Caused by Binding of Valve Shaft in Stuffing Box Bore Below Packing Due to Buildup of Corrosion (← links)
- 05000316/LER-1982-008-03, /03L-0:on 820118,at 100% Power,Scan Errors on Axial Power Distribution Monitoring Sys Prompted Operators to Use Flux Mapping Sys & Plant Computer P-250 to Monitor Axial Power Distribution.Caused by Procedure Error (← links)
- 05000316/LER-1982-008, Forwards LER 82-008/03L-0 (← links)
- 05000316/LER-1982-006-03, /03L-0:on 820116,containment Air Particulate & Gaseous Radiation Monitoring Sys R-11/R-12 Sample Pump Tripped on Low Flow.Caused by Paper Jam.Filter Paper Replaced (← links)
- 05000316/LER-1982-005-03, /03L-0:on 820117,steam Generator Steam 3 Flow Channel 1 (MFC-131)found to Be Indicating Low.Caused by Sensing Lines Losing Fill.Sensing Lines Refilled (← links)
- 05000316/LER-1982-004-03, /03L-0:on 820116,RCS Dose Equivalent I-131 Concentration Exceeded 1.0 Uci/G steady-state Limit & Unit Experienced 100% Trip (← links)
- 05000316/LER-1982-002-01, Essential Svc Water Valves WMO-734 & 738 Were Not Tested as Required by Tech Specs.Caused by Valves WMO-734 & 738 Being Inadvertently Omitted During Oct 1979 Procedure Revision (← links)
- 05000316/LER-1982-002, Forwards Updated LER 82-002/01X-1 (← links)
- 05000316/LER-1981-075-03, /03L-0:on 811231,during Normal Operation,Flow Indicator for Turbine Gland Seal leak-off Failed Low.Cause Unknown.Indicator Installed in Wet Sys Could Be Contributing Factor.Indicator Replaced (← links)
- 05000316/LER-1981-075, Forwards LER 81-075/03L-0 (← links)
- 05000316/LER-1982-003, Forwards LER 82-003/01T-0 (← links)
- 05000316/LER-1982-001-04, /04T-0:on 820110,during Deicing,Circulating Water Sys Discharge Temp Exceeded Tech Specs.Caused by Inability to Open Discharge Gates WMO-25A & WMO-25B Electrically.Valve Positions Changed Manually (← links)
- 05000316/LER-1982-001, Forwards LER 82-001/04T-0 (← links)
- 05000316/LER-1981-035-03, /03L-0:on 810721,bistable Tripped at Value Corresponding to Steam Generator Level 21.8%.Cause Not Stated.Bistable Exercised,Recalibr & Returned to Svc (← links)
- 05000316/LER-1981-039, Is Canceled (← links)
- 05000316/LER-1981-074-03, /03L-0:on 811215,three Logic Positions Tested Unsatisfactorily,Affecting Containment Pressure hi-hi Portion of Automatic Actuation Logic.Caused by Failure of Universal Card A-209.Card Replaced (← links)
- 05000316/LER-1981-074, Forwards LER 81-074/03L-0 (← links)
- 05000316/LER-1981-073-03, /03L-0:on 811210,two of Four RCS Hot Leg Temp Indications & Two Wide Range Pressure Indications Found Reading Low.On 811016,low Current Condition Found to Be Causing Low Reading.Subj Instruments Disconnected (← links)
- 05000316/LER-1981-073, Forwards LER 81-073/03L-0 (← links)
- 05000316/LER-1981-071-03, /03L-0:on 811206,power Supply Breaker Feeding Flux Drive & Axial Power Distribution Monitoring Sys Panels Tripped Open & Would Not Stay Closed.Caused by Open Circuit on Breaker Due to Component Fatigue.Opposite Breaker Used (← links)
- 05000316/LER-1981-071, Forwards LER 81-071/03L-0 (← links)
- 05000316/LER-1981-072-03, /03L-0:on 811207,during Design Review of Radiation Monitoring Sys,Discrepancy Discovered Between Design of Sys & Tech Spec Requirements Re Containment Ventilation Isolation Function of Monitor R-2.Design Change Underway (← links)
- 05000316/LER-1981-072, Forwards LER 81-072/03L-0 (← links)
- 05000316/LER-1981-066-04, /04L-0:on 811127,no Flow Discovered on 4 Steam Generator Sample Line.Cause Not Stated.Steam Generator Blowdown Isolated (← links)
- 05000316/LER-1981-066, Forwards LER 81-066/04L-0 (← links)
- 05000316/LER-1981-070-03, /03L-0:on 811128,4 Steam Generator Stop Valve Dump Valve Removed from Svc for Seat Leakage Repair.Stem,Disc, Seat Ring & Gaskets Were Replaced in Fisher 657 EAS Valve. Seat Leakage Not Totally Preventable (← links)
- 05000316/LER-1981-069-03, /03L-0:on 811124,2 Steam Generator Stop Valve,Dump Valve MRV-222 Found Leaking After Repair.Caused by Improper Seating Surface Angle on Fisher 657 EAS Disc.Disc,Stem & Seat Ring Replaced (← links)
- 05000316/LER-1981-068-03, /03L-0:on 811124,2 Steam Generator Stop Valve Dump valve,MRV-222 Removed from Svc to Repair Seat Leakage.Seat, Steam Disc & Gaskets Were Replaced in Fisher 657 EPS Valve. Seat Leakage Not Totally Preventable (← links)
- 05000316/LER-1981-063-03, /03L-0:on 811029,discovered That Turbine Driven Auxiliary Feed Pump Was Approx 150 F While in Standby Condition.Leaking Check Valve Undetermined.Caution Tags Placed on Four Steam Generator Auxiliary Feedwater Valves (← links)
- 05000316/LER-1981-062-03, /03L-0:on 811029,while Performing Surveillance Test During Reactor Startup,Valve IMO-910,RWST to Charging Pump Suction,Would Not Open from Control Room.Cause of Hard Seating Undetermined.Torque & Switch Settings Verified (← links)
- 05000316/LER-1981-055-04, Determined Gaseous Release of 29.687 Ci,Apparently Starting on 811030.Caused by Vol Control Tank Gas Leaking Past Valve NS-186,entering Waste Disposal Sys & Offgassing (← links)
- 05000316/LER-1981-054-04, Determined Leak Existed in Sys Coolers Causing Low Level Alarm on Control Fluid Sys on 811031.Caused by Tube Failure in Cooler.Tube Plugged & Unit Returned to Svc (← links)
- 05000316/LER-1981-064-03, /03L-0:on 811104,Allison 100 Point Fire Detection Sys Determined to Be Inoperable.Caused by One of 12-volt Power Supplies Failing.Power Supply Replaced (← links)
- 05000316/LER-1981-064, Forwards LER 81-064/03L-0 & Updated LERs 81-054/04X-1 & 81-055/04X-1 (← links)
- 05000316/LER-1981-021-03, /03L-0:on 810523,feedwater Isolation Valves for Steam Generators 1 & 4 Failed to Close Upon Receipt of Feedwater Isolation Signal.Caused by Misalignment of Switch Actuating Arm on Reactor Bypass Breaker a (← links)
- 05000316/LER-1981-021, Forwards LER 81-021/03L-0 (← links)
- 05000316/LER-1981-020-04, /04T-0:on 810604,discovered No Flow Through Rad Monitor R-19 from Any of Four Steam Generators.Caused by Buildup of Crud at roto-meter Flow Regulator.Crud Dislodged & Flow re-established (← links)
- 05000316/LER-1981-020, Forwards LER 81-020/04T-0 (← links)
- 05000316/LER-1981-057-03, /03L-0:on 811024-1105,steam Generator 4 Blowdown Isolation Valve DCR-340 Failed to Meet Tech Spec Closing Time.Caused by Improperly Aligned Light Switch,Scored Stem Packing & Gasket & Leaking Asco Solenoid Valve (← links)
- 05000316/LER-1981-056-03, /03L-0:on 811019,review Revealed 811018 Mode Change Took Place W/O Surveillance on N Train Battery Current as Required.Caused by Lack of Signoff of Plant Heatup Procedure (← links)
- 05000316/LER-1981-060-03, /03L-0:on 811031,during Normal Operation,Failed Proximity Switches Noted for Stop Valves a & D for Trains B & A,Respectively.Cause Unknown Because Unit Cannot Be Disassembled.Switches Replaced (← links)
- 05000316/LER-1981-060, Forwards LER 81-060/03L-0 (← links)
- 05000316/LER-1981-061-03, /03L-0:on 811030,during Reactor Startup at 20% Power,Steam Generator Flow 3 Channel 1 Failed Low.Caused by Air Trapped in Sensing Lines Causing Incorrect Transmitter Output.Sensing Lines Blown Down (← links)
- 05000316/LER-1981-061, Forwards LER 81-061/03L-0 (← links)
- 05000316/LER-1981-059-03, /03L-0:on 811024,pressurizer Pressure Decreased to 2185 Psig When Turbine Load Control Tried to Maintain Setpoint While Main Condenser Vacuum Decreased Due to Air Inleakage.Caused by Increased Secondary Steam Demand (← links)
- 05000316/LER-1981-059, Forwards LER 81-059/03L-0 (← links)
- 05000316/LER-1981-044-03, During Verification of Seismic safety-related Piping Sys,Discrepancies Noted on Various Sys Re Overstress Conditions.Caused by Differences in Geometric Layout & in Location of Supports (← links)
- 05000316/LER-1981-044, Forwards Updated LER 81-044/03X-2.Schedules Proposed in IE Bulletin 79-14 Too Short to Permit Timely Response (← links)
- 05000316/LER-1981-053-03, /03L-0:on 811007,during Insp of Inaccessible Hydraulic Snubbers,Snubbers 2 Found W/Clevis Pin Missing. Caused by Vertical Clevis Pin Upper Nut Vibrating Off & Allowing Pin to Drop Out,Leaving Snubber Detached (← links)
- 05000316/LER-1981-053, Forwards LER 81-053/03L-0 (← links)
- 05000316/LER-1981-052-03, /03L-0:on 811001,discovered Seven Core Bores Had Been Performed in Unit 1 & Two safety-related Fire Zones, Providing Through Wall Penetrations.Caused by Procedural Deficiencies.Fire Watches Posted.Penetrations Sealed (← links)
- 05000316/LER-1981-052, Forwards LER 81-052/03L-0 (← links)
- 05000316/LER-1981-051-03, /03L-0:on 810929,discovered Welding Lead Run Through Penetration Fire Barrier.Cause Not Stated.Lead Removed.Fire Watches Posted.Barrier Repaired.Training Seminars Scheduled.Qc Manual Revision in Progress (← links)
- 05000316/LER-1981-051, Forwards LER 81-051/03L-0 (← links)
- 05000316/LER-1981-050-01, /01T-0:on 811014,during Maint of Check Valve SI-152S,valve Disc Found Missing.Probably Caused by Oversight During Preoperation Period.New Disc Installed (← links)
- 05000316/LER-1981-050, Forwards LER 81-050/01T-0 (← links)
- 05000316/LER-1981-049-03, /03L-0:on 811002,reactor Coolant Sys Dose Equivalent Iodine Concentration Was Found to Exceed Tech Specs.Caused by Increasing Primary to Secondary Leak Rate. Sys Cooled & Degassed for Steam Generator Tube Plugging (← links)
- 05000316/LER-1981-049, Forwards LER 81-049/03L-0 (← links)
- 05000316/LER-1981-047-03, /03L-0:on 810925,post-accident Instrumentation Surveillance Requirements for RWST Level Only Partially Being Performed on Routine Basis.Caused by Inadequate Use of Unit 2 Procedure to Document Channel Check for Unit 1 (← links)
- 05000316/LER-1981-047, Forwards LER 81-047/03L-0 (← links)
- 05000316/LER-1981-048-01, /01T-0:on 811007,during Repairs on Check Valve 2-CS-32914 in Normal Charging Line to RCS Loop 4 to Correct Body to Bonnet Leak,Bonnet Studs Found Severely Corroded. Caused by Bonnet Gasket Leak from Valve (← links)
- 05000316/LER-1981-048, Forwards LER 81-048/01T-0 (← links)
- 05000316/LER-1981-046-03, /03L-0:on 810922,during Surveillance Test,Channel 2 Containment Pressure High Protection Bistable 2PB-936B Found to Be Actuating at Value Equal to 1.319 Psig.Caused by Setpoint Drift.Bistable Replaced.Lugged Resistor Soldere (← links)
- 05000316/LER-1981-046, Forwards LER 81-046/03L-0 (← links)
- 05000316/LER-1981-042-03, /03L-0:on 810811,during Surveillance testing,612 Ft Elevation Containment Inner Airlock Door Interlock Found Inoperable.Caused by Cable Being Out of Adjustment.Cable Adjusted & Interlock Tested Satisfactorily (← links)
- 05000316/LER-1981-042, Forwards LER 81-042/03L-0 (← links)
- 05000316/LER-1981-043-03, /03L-0:on 810815,load Reduction of Approx 240 MW Occurred.Caused by Time Delay Involved in electro-hydraulic Control Sys.Ler Being Circulated to All Control Room Operators as Alert (← links)
- 05000316/LER-1981-043, Forwards LER 81-043/03L-0 (← links)
- 05000316/LER-1981-045-03, /03L-0:on 810820,emergency Diesel Engines Declared Inoperable Due to Broken Taper Pin on Diesel 2CD & Three Loose Pins on Diesel 2AB.Cause Unknown.Pins Replaced & Insp of Fuel Control Linkage Pins Added to 18-month Insp (← links)
- 05000316/LER-1981-045, Forwards LER 81-045/03L-0 (← links)
- 05000316/LER-1981-040-03, /03L-0:on 810804,BIT Outlet Containment Isolation Valve Would Not Fully Open from Control Room During Test, Resulting in Inoperable Flow Path.Caused by Insufficient Insulation Allowing Boron to Solidify on Stem (← links)
- 05000316/LER-1981-040, Forwards LER 81-040/03L-0 (← links)
- 05000316/LER-1981-036-03, /03L-0:on 810723,loop 4 temp-average & delta-temp Indication Was High.Caused by Failed Resistance Temp Detector for Loop 4 temp-cold.Spare Detector Placed in Svc (← links)
- 05000316/LER-1981-036, Forwards LER 81-036/03L-0 (← links)
- 05000316/LER-1983-003-01, /01T-0:on 821222,w/RCS in Mode 6,during Test on Diesel Generator Load Shedding,Five Relay Timers Found Exceeding Tech Spec Tolerance.Caused by Instrument Drift. Timers Recalibr on 830118 During Mode 3 (← links)
- 05000316/LER-1983-003, Forwards LER 83-003/01T-0.Detailed Event Analysis Submitted (← links)
- 05000316/LER-1983-004-01, /01T-0:on 830107,during Surveillance Test on Spray Additive Tank Flow Rate,East & West Containment Spray Pump Eductor Line Flow Rates Below Tech Specs.Caused by Eductor Valves IMO-212 & 222 Partially Closed (← links)
- ML020910218 (redirect page) (← links)
- ML102250514 (← links)
- ML091610448 (← links)
- 05000315/LER-2002-008, Failure to Complete Unit Shutdown as Required by Technical Specification 3.6.5.1 (← links)
- 05000316/LER-2002-007, Re Technical Specification 3.8.1.1 Allowed Outage Time Exceeded (← links)
- 05000316/LER-2002-006, Regarding Reactor Trip Due to Low Condenser Vacuum (← links)
- 05000315/LER-2002-007, Technical Specification 3.3.3 1 Required Special Report for Inoperable Radiation Monitors (← links)
- 05000315/LER-2002-005, Manual Trip Due to Trip of East Main Feedwater Pump on June 14, 2002 (← links)
- 05000315/LER-2002-006, Switchyard Fire Results in Violation of Technical Specification 3.0.5 (← links)
- 05000316/LER-2002-005, On May 12,2002 Unit 2 Tripped Due to Instrument Rack 24-Volt DC Power Supply Failure (← links)
- 05000316/LER-2002-003, Re Battery Inoperable for Longer than Allowed by Plants Technical Specification (← links)
- 05000315/LER-2002-002, Pressurizer Power Operated Relief Valves Inoperable Due to Control Switch Position (← links)
- 05000316/LER-2002-002, Technical Specification 3.9.4.c Was Violated During Core Alteration (← links)
- 05000315/LER-2002-001, Re Failure to Perform Ice Condenser Door Testing in Accordance with Technical Specifications (← links)
- 05000316/LER-2002-004, Re Unanticipated Start of the Turbine Drive Auxiliary Feedwater Pump (← links)