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| 05000271/LER-1983-001, Forwards LER 83-001/01T-0 | Forwards LER 83-001/01T-0 | |
| 05000271/LER-1983-001-01, /01T-0:on 830107,containment Isolation Valves Failed to Close When Operator Attempted to Secure Nitrogen Flow.Caused by Accumulation of Ferrous Metal Particles on Magnet Providing Valve Position Indication.Valves Cleaned | /01T-0:on 830107,containment Isolation Valves Failed to Close When Operator Attempted to Secure Nitrogen Flow.Caused by Accumulation of Ferrous Metal Particles on Magnet Providing Valve Position Indication.Valves Cleaned | |
| 05000271/LER-1983-002-01, Leak Found in 2-inch SS Schedule 160 Elbow in Isolable Section of Reactor Drain Line.Caused by Intergranular Stress Corrosion Cracking.Elbow Replaced W/Type 304L Stainless Steel Matl | Leak Found in 2-inch SS Schedule 160 Elbow in Isolable Section of Reactor Drain Line.Caused by Intergranular Stress Corrosion Cracking.Elbow Replaced W/Type 304L Stainless Steel Matl | |
| 05000271/LER-1983-002, Forwards LER 83-002/02T-0 | Forwards LER 83-002/02T-0 | |
| 05000271/LER-1983-002-02, /02T-0:on 830108,discovered Leak in 2-inch Stainless Steel Schedule 160 Isolable Section of Reactor Drain Line.Cause Unknown.Leaking Elbow Replaced w/304L Type Stainless Steel Matl Per NUREG-0313 Requirements | /02T-0:on 830108,discovered Leak in 2-inch Stainless Steel Schedule 160 Isolable Section of Reactor Drain Line.Cause Unknown.Leaking Elbow Replaced w/304L Type Stainless Steel Matl Per NUREG-0313 Requirements | |
| 05000271/LER-1983-003, Forwards LER 83-003/03L-0 | Forwards LER 83-003/03L-0 | |
| 05000271/LER-1983-004, Forwards LER 83-004/03L-0 | Forwards LER 83-004/03L-0 | |
| 05000271/LER-1983-004-03, /03L-0:on 830120,flowmeter on Containment Air Monitor Read Zero Due to Leakage Past Detector O-ring Seal Into Reactor Bldg.Cause Not determined.O-ring Reseated | /03L-0:on 830120,flowmeter on Containment Air Monitor Read Zero Due to Leakage Past Detector O-ring Seal Into Reactor Bldg.Cause Not determined.O-ring Reseated | |
| 05000271/LER-1983-005-01, /01P-0:on 830203,while Attempting to Reduce Flow Through Nitrogen Makeup line,V-16-20-20 & 22B Failed to Close.Cause Unknown.No Attempt Made to Inspect or Repair Due to Questions on Acceptability of Manual Isolation | /01P-0:on 830203,while Attempting to Reduce Flow Through Nitrogen Makeup line,V-16-20-20 & 22B Failed to Close.Cause Unknown.No Attempt Made to Inspect or Repair Due to Questions on Acceptability of Manual Isolation | |
| 05000271/LER-1983-005, Forwards LER 83-005/01P-0 | Forwards LER 83-005/01P-0 | |
| 05000271/LER-1983-006-01, Valve V13-18 Failed to Close.Caused by Maladjusted Mechanical Interlock Mechanism, Causing Contactors to Bind.Event Isolated & Not Considered Generic Problem | Valve V13-18 Failed to Close.Caused by Maladjusted Mechanical Interlock Mechanism, Causing Contactors to Bind.Event Isolated & Not Considered Generic Problem | |
| 05000271/LER-1983-006, Forwards Updated LER 83-006/01X-0 | Forwards Updated LER 83-006/01X-0 | |
| 05000271/LER-1983-007-03, /03L-0:on 830228,during Surveillance Testing, Reactor Bldg Vent Radiation Monitor 17-452A Actuated Above Tech Spec Limit.Caused by Setpoint Drift.Monitor Adjusted to Allowable Limit & Returned to Svc | /03L-0:on 830228,during Surveillance Testing, Reactor Bldg Vent Radiation Monitor 17-452A Actuated Above Tech Spec Limit.Caused by Setpoint Drift.Monitor Adjusted to Allowable Limit & Returned to Svc | |
| 05000271/LER-1983-007, Forwards LER 83-007/03L-0 | Forwards LER 83-007/03L-0 | |
| 05000271/LER-1983-008, Forwards LER 83-008/03L-0 | Forwards LER 83-008/03L-0 | |
| 05000271/LER-1983-008-03, /03L-0:on 830319,testing Revealed Actual Relief Setpoint on Main Steam Relief Valve to Be Out of Tech Spec Limit.Setpoint Drift Result of Excessive Pilot Valve Leakage.Relief Valve Being Rebuilt & Recalibr | /03L-0:on 830319,testing Revealed Actual Relief Setpoint on Main Steam Relief Valve to Be Out of Tech Spec Limit.Setpoint Drift Result of Excessive Pilot Valve Leakage.Relief Valve Being Rebuilt & Recalibr | |
| 05000271/LER-1983-009-01, /01P-0:on 830321,during Refueling Outage,Planned Mods of Reactor Protection Sys Motor Generator Set Resulted in Primary Containment Isolation Sys Isolation of Ventilation Sys.Caused by Premature Removal of Slide Links | /01P-0:on 830321,during Refueling Outage,Planned Mods of Reactor Protection Sys Motor Generator Set Resulted in Primary Containment Isolation Sys Isolation of Ventilation Sys.Caused by Premature Removal of Slide Links | |
| 05000271/LER-1983-009, Followup LER 83-009/01T-0:on 830321,primary Containment Isolation Sys Isolation of Containment Ventilation Sys Occurred.Caused by Mods to Reactor Protection Sys Motor Generator.Fuel Handling Activities Suspended | Followup LER 83-009/01T-0:on 830321,primary Containment Isolation Sys Isolation of Containment Ventilation Sys Occurred.Caused by Mods to Reactor Protection Sys Motor Generator.Fuel Handling Activities Suspended | |
| 05000271/LER-1983-010, Forwards LER 83-010/03L-0 | Forwards LER 83-010/03L-0 | |
| 05000271/LER-1983-010-03, /03L-0:on 830324,while Performing Type C Leak Rate Testing,Feedwater Check Valve FDW-96A Had Seat Leakage Exceeding Tech Spec Limits.Caused by Mfg Defect on Resilient Seal.Seal Replaced,Valve Reassembled & Leak Tested | /03L-0:on 830324,while Performing Type C Leak Rate Testing,Feedwater Check Valve FDW-96A Had Seat Leakage Exceeding Tech Spec Limits.Caused by Mfg Defect on Resilient Seal.Seal Replaced,Valve Reassembled & Leak Tested | |
| 05000271/LER-1983-011-03, /03L-0:on 830325,during Visual Insp,Shock Suppressor MS-6 on Main Steam a Piping Found W/No Visible Fluid in Sight Glass & Failed to Lock Up.Caused by Damaged Lenztee.Snubber Cleaned & Rebuilt | /03L-0:on 830325,during Visual Insp,Shock Suppressor MS-6 on Main Steam a Piping Found W/No Visible Fluid in Sight Glass & Failed to Lock Up.Caused by Damaged Lenztee.Snubber Cleaned & Rebuilt | |
| 05000271/LER-1983-011, Forwards LER 83-011/03L-0 | Forwards LER 83-011/03L-0 | |
| 05000271/LER-1983-012, Forwards LER 83-012/01P-0 | Forwards LER 83-012/01P-0 | |
| 05000271/LER-1983-012-01, /01P-0:on 830412,during Inservice Insp Required by IE Bulletin 83-02,rejectable Indications Discovered on Five Risers to Sweepolet Welds & Two Pipe to safe-end Welds. Rept Will Be Submitted Prior to Resuming Power Operations | /01P-0:on 830412,during Inservice Insp Required by IE Bulletin 83-02,rejectable Indications Discovered on Five Risers to Sweepolet Welds & Two Pipe to safe-end Welds. Rept Will Be Submitted Prior to Resuming Power Operations | |
| 05000271/LER-1983-013-03, /03L-0:on 830413,while Reactor Shutdown,Weekly Environ Air Sample for 830405-12 at Station AT1.3 Not Obtained.Caused by Technician Failure to Test for Sys Vacuum.Technician Reinstructed in Procedure | /03L-0:on 830413,while Reactor Shutdown,Weekly Environ Air Sample for 830405-12 at Station AT1.3 Not Obtained.Caused by Technician Failure to Test for Sys Vacuum.Technician Reinstructed in Procedure | |
| 05000271/LER-1983-014-03, /03L-0:on 830510,discovered Surveillance Frequency for Svc Water Processs Monitor Exceeded Tech Specs.Caused by Schedule Error.Analysis Immediately Performed.Applicable Personnel Reinstructed | /03L-0:on 830510,discovered Surveillance Frequency for Svc Water Processs Monitor Exceeded Tech Specs.Caused by Schedule Error.Analysis Immediately Performed.Applicable Personnel Reinstructed | |
| 05000271/LER-1983-015-01, Rept Received from Yankee Atomic Electric Co Re Error in Design & Use of Spacing Table for Copper Piping in Svc Water Sys.Caused by Failure to Follow ANSI B31.1 | Rept Received from Yankee Atomic Electric Co Re Error in Design & Use of Spacing Table for Copper Piping in Svc Water Sys.Caused by Failure to Follow ANSI B31.1 | |
| 05000271/LER-1983-016-03, /03L-0:on 830620,MSIV 86A Closed in 5.5 S.Caused by Broken Spring in Hydraulic Dashpot Closure Time Adjustment Mechanism.Broken Spring Replaced,Hydraulic Dash Pot Reassembled & Valve Retimed | /03L-0:on 830620,MSIV 86A Closed in 5.5 S.Caused by Broken Spring in Hydraulic Dashpot Closure Time Adjustment Mechanism.Broken Spring Replaced,Hydraulic Dash Pot Reassembled & Valve Retimed | |
| 05000271/LER-1983-017-03, /03L-0:on 830629,time Delay Unit 10A-KY5-1 Failed to Actuate in Required Time During RHR Sys Surveillance. Caused by Faulty Time Delay Unit.Entire Time Delay Unit Replaced | /03L-0:on 830629,time Delay Unit 10A-KY5-1 Failed to Actuate in Required Time During RHR Sys Surveillance. Caused by Faulty Time Delay Unit.Entire Time Delay Unit Replaced | |
| 05000271/LER-1983-018-03, /03L-0:on 830809,HPCI Sys Declared Inoperable After Tripping & Resetting Occurred During Vibration Test. Caused by Normal Vibration Loosening Set Screw Holding Piston in Position on Ball & Tappet Holder | /03L-0:on 830809,HPCI Sys Declared Inoperable After Tripping & Resetting Occurred During Vibration Test. Caused by Normal Vibration Loosening Set Screw Holding Piston in Position on Ball & Tappet Holder | |
| 05000271/LER-1983-019-03, /03L-0:on 830816,during Normal Review,Rhr Torus Spray Valve 38A Had Loss of Indication.Caused by Accidental Bumping of Circuit Breaker by Workers.Breaker Closed,Valve Stroked & Workers Reinstructed | /03L-0:on 830816,during Normal Review,Rhr Torus Spray Valve 38A Had Loss of Indication.Caused by Accidental Bumping of Circuit Breaker by Workers.Breaker Closed,Valve Stroked & Workers Reinstructed | |
| 05000271/LER-1983-021-03, /03L-0:on 830830,during Surveillance on Drywell Pressure ECCS indicators,PT-10-101D(M) Actuated at 2.57 Psig.Caused by Instrument Drift.Trip Unit Replaced W/Calibr Unit | /03L-0:on 830830,during Surveillance on Drywell Pressure ECCS indicators,PT-10-101D(M) Actuated at 2.57 Psig.Caused by Instrument Drift.Trip Unit Replaced W/Calibr Unit | |
| 05000271/LER-1983-022-03, /03L-0:on 830913,reactor Water Cleanup Sys Outboard Isolation Valve Malfunctioned.Caused by Faulty Torque Switch in Valve Operator.Torque Switch Replaced & Sys Tested Satisfactorily | /03L-0:on 830913,reactor Water Cleanup Sys Outboard Isolation Valve Malfunctioned.Caused by Faulty Torque Switch in Valve Operator.Torque Switch Replaced & Sys Tested Satisfactorily | |
| 05000271/LER-1983-023-03, /03L-0:on 830923,health Physics Sampling Program Revealed High Co-60 Concentration at North Storm Drain Outfall.Caused by Low Level Airborne Releases from Turbine Bldg Roof Vents.Sample Point Added | /03L-0:on 830923,health Physics Sampling Program Revealed High Co-60 Concentration at North Storm Drain Outfall.Caused by Low Level Airborne Releases from Turbine Bldg Roof Vents.Sample Point Added | |
| 05000271/LER-1983-024-03, /03L-0:on 830926,air Ejector Offgas Radiation Monitor Removed from Svc W/O First Implementing Proper Administrative Controls.Caused by Shift Supervisors Failure to Make Required Log Entries & Document Checks | /03L-0:on 830926,air Ejector Offgas Radiation Monitor Removed from Svc W/O First Implementing Proper Administrative Controls.Caused by Shift Supervisors Failure to Make Required Log Entries & Document Checks | |
| 05000271/LER-1983-025-01, /01P-0:on 830928,during Normal Operation,Main Steam Line Radiation Monitor RM-17-251A Trip Setpoint Greater than 3 Times Normal Background at Rated Power.Caused by Inadequate Procedure.Trips Reset | /01P-0:on 830928,during Normal Operation,Main Steam Line Radiation Monitor RM-17-251A Trip Setpoint Greater than 3 Times Normal Background at Rated Power.Caused by Inadequate Procedure.Trips Reset | |
| 05000271/LER-1983-026-03, /03L-0:on 830928,during Insp of Standby Liquid Control sys,3/4-inch Leak Test Valve SLC-36 Found Open. Caused by Inadequate Controls in Recirculation Loop Decontamination Procedure | /03L-0:on 830928,during Insp of Standby Liquid Control sys,3/4-inch Leak Test Valve SLC-36 Found Open. Caused by Inadequate Controls in Recirculation Loop Decontamination Procedure | |
| 05000271/LER-1983-027-01, /01T-0:on 831012,operator Noticed Water Near Diesel Generator a Air Start Check Valve.Caused by Loose Nut on Valve Spring Retainer Resulting in Improper Seating. Check Valve Replaced | /01T-0:on 831012,operator Noticed Water Near Diesel Generator a Air Start Check Valve.Caused by Loose Nut on Valve Spring Retainer Resulting in Improper Seating. Check Valve Replaced | |
| 05000271/LER-1983-028-03, /03L-0:on 831014,during Normal Operation,Smoke Coming from RHR Pump 1D Motor Caused Operator to Immediately Remove All Fuses from Pump Motor Breaker,Making LPCI Inoperable.Smoke Caused by Dirt & Oil Film | /03L-0:on 831014,during Normal Operation,Smoke Coming from RHR Pump 1D Motor Caused Operator to Immediately Remove All Fuses from Pump Motor Breaker,Making LPCI Inoperable.Smoke Caused by Dirt & Oil Film | |
| 05000271/LER-1983-029-03, /03L-0:on 830630,quarterly Analysis of Stack Gas for Gross alpha,Sr-89 & Sr-90 Particulate Activity for Second Quarter 1983 Incomplete.Caused by Personnel Error. Required Analysis Completed | /03L-0:on 830630,quarterly Analysis of Stack Gas for Gross alpha,Sr-89 & Sr-90 Particulate Activity for Second Quarter 1983 Incomplete.Caused by Personnel Error. Required Analysis Completed | |
| 05000271/LER-1983-030-03, /03L-0:on 831105,MSIV 86A Shut in 2.6 s, Outside 3-5 Close Time Requirement.Caused by Air Bleedoff Plug Being Backed Out of Inserted Position.Air Bleedoff Plug Reinstalled | /03L-0:on 831105,MSIV 86A Shut in 2.6 s, Outside 3-5 Close Time Requirement.Caused by Air Bleedoff Plug Being Backed Out of Inserted Position.Air Bleedoff Plug Reinstalled | |
| 05000271/LER-1983-031-03, /03L-0:on 831101,during Live Steam Bench Testing of Two Main Steam Relief Valves,S/N 67HH14 Had 1,122 Psig as-found Setpoint.Caused by Setpoint Drift.Valve Recalibr & Reinstalled | /03L-0:on 831101,during Live Steam Bench Testing of Two Main Steam Relief Valves,S/N 67HH14 Had 1,122 Psig as-found Setpoint.Caused by Setpoint Drift.Valve Recalibr & Reinstalled | |
| 05000271/LER-1983-032-01, /01T-0:on 831117,while Returning Valve Lineup to Standby,Valve Overload Alarm Came in & Vavle Indications for HPCI MOV 23-20 & MOV 13-20 Lost Due to Breaker Trip.Caused by Contact Corrosion | /01T-0:on 831117,while Returning Valve Lineup to Standby,Valve Overload Alarm Came in & Vavle Indications for HPCI MOV 23-20 & MOV 13-20 Lost Due to Breaker Trip.Caused by Contact Corrosion | |
| 05000271/LER-1983-033-03, /03L-0:on 831123,main Steam Line Radiation Monitor 17-251C Indication Decreased,Making Trip Setpoint More than Three Times Greater than Required.Caused by Zero Bias Voltage Drift.Monitor Recalibr | /03L-0:on 831123,main Steam Line Radiation Monitor 17-251C Indication Decreased,Making Trip Setpoint More than Three Times Greater than Required.Caused by Zero Bias Voltage Drift.Monitor Recalibr | |
| 05000271/LER-1983-034-03, /03L-0:on 831206,condensate Storage Tank Level Instrument LT-107-5B Found Out of Adjustment,Resulting in Lower Setpoint for HPCI Suction Transfer.Caused by Zero Shift of Level Transmitter | /03L-0:on 831206,condensate Storage Tank Level Instrument LT-107-5B Found Out of Adjustment,Resulting in Lower Setpoint for HPCI Suction Transfer.Caused by Zero Shift of Level Transmitter | |