Semantic search
Jump to navigation
Jump to search
| Issue date | Title | Topic | |
|---|---|---|---|
| ML20042F326 | 4 May 1990 | LER 90-005-00:on 900404,intergranular Attack & IGSCC Results in Both Steam Generators a & B Being Categorized as C-3.All Defective Tubes Plugged & Sludge Lancing & Crevice Flushing conducted.W/900504 Ltr | Boric Acid |
| ML20024B722 | 1 July 1983 | LER 83-015/03L-0:on 830606,during Valve Timing Test for Td Auxiliary Feedwater Pump,Valve Failed to Electrically Open. Caused by Faulty Torque Switch & Maladjusted Tripper Cam. Valve Operator Rebuilt & Cam reset.W/830701 Ltr | |
| ML20024B729 | 1 July 1983 | LER 83-014/03L-0:on 830603,while Performing Monthly RHR Pump & Valve Surveillance Test,Containment Sump B Isolation Valve SI-350B Would Not Cycle Closed.Caused by Mechanical Interlock Sticking in Open position.W/830701 Ltr | |
| ML20023C368 | 6 May 1983 | Updated LER 82-030/01X-2:on 821004,sensing Lines on Six safety-related Containment Pressure Transmitters Found Capped Off Inside Containment.Caused by Personnel Error During Maint.Caps Removed | |
| ML20028F436 | 14 January 1983 | LER 82-035/03L-1:on 821216,during Full Power Operation, Pinhole Leak Discovered in Suction Line from Vol Control Tank to Charging Pumps.Caused by Vibrations & Pulsations in Associated Piping.Leak Plugged | |
| ML20028E382 | 14 January 1983 | LER 82-035/03L-0:on 821216,pinhole Leak Discovered in Suction Line from Vol Control Tank to Charging Pumps.Caused by Vibrations in Piping.Leak Plugged & Piping to Be Replaced During Next Refueling Outage | |
| ML20052G735 | 10 May 1982 | LER 82-009/03L-0:on 820410,w/unit at Hot Shutdown Prior to Scheduled Refueling Outage,Both Source Range Nuclear Instruments Were Inoperable.Caused by Accumulation of Water in Instrument Canisters.Spare Detector Installed | |
| ML20052G138 | 6 May 1982 | LER 82-008/01T-0:on 820422,during Refueling Outage,Leak Repair Procedures on Valve SI-13B Revealed Significant Boric Acid Corrosion Wastage of body-to-bonnet Bolts.Caused by Bolt Degradation.Affected Bolts Replaced | Boric Acid |
| ML20052G140 | 6 May 1982 | LER 82-007/01T-0:on 820422,during Refueling Outage,Leak Repair Procedures on Valve PS-1A Revealed Significant Boric Acid Corrosion Wastage on body-to-bonnet Bolts.Caused by Bolt Degradation.Affected Bolts Replaced | Boric Acid |
| ML20052G725 | 7 April 1982 | LER 82-005/03X-1:on 820309,during Quarterly Surveillance Testing of Svc Water pumps,IA2 Svc Water Pump Failed to Start on Demand.Circuit Breaker Failed to Close by Remote Initiation.Caused by Failed Open Closing Coil.Coil Replaced | |
| ML20041B379 | 15 February 1982 | LER 82-003/03L-0:on 820116,1A Zone SV Fan Started Automatically.Caused by Solenoid Valve Failure Due to Burned Out Coil in Closed Position Which Automatically Opened Damper.Coil Replaced & Sys Tested Satisfactorily | |
| ML20041B360 | 12 February 1982 | LER 82-002/03L-0:on 820114,deviation in Pressurizer (Pzr) Level Indication Noted.Caused by Instrument Calibr Out of Spec.Transmitter Recalibr | |
| ML20040G608 | 5 February 1982 | LER 82-001/03L-0:on 820108,during Operability Check of Zone Special Ventilation,Exhaust Fan 1B Failed to Start.Caused by Failure of Solenoid Valve Due to Sticking Solenoid.Valve Replaced & Sys Tested.Design Change Initiated | |
| ML20040F357 | 1 February 1982 | LER 81-039/03X-1:on 811218,leaking Weld on Discharge Side of 1C Charging Pump Relief valve,CVC-101C,discovered.Caused by Vibrations & Pulsations in Associated Piping.Pipe Section Replaced.Design Change in Progress | |
| ML20040A577 | 15 January 1982 | LER 81-039/03L-0:on 811218,found Leaking Weld on Discharge Side of 1C Charging Pump Relief Valve CVC-101C.Caused by Weld Fatigue Attributed to Vibrations & Pulsations in Associated Piping.Pipe Replaced.Design Change in Progress | |
| ML20039B183 | 11 December 1981 | LER 81-038/03L-0:on 811113,during Surveillance Testing on Shield Bldg Vent Sys,Check Damper SBV-10A Failed Shut.Caused by Ruptured Diaphragm Which Separates Motor from Oil Reservoir.Motor Replaced | |
| ML20038C262 | 3 December 1981 | LER 81-036/03L-0:on 811103,motor-driven Auxiliary Feedwater Pump Lubricator Oil Pump Continued to Run When Pump 1A Was Stopped.Caused by Excessive Wear & Misalignment of Auxiliary Switch Linkage Mechanism Allowing Switch to Remain Closed | |
| ML20038B001 | 17 November 1981 | LER 81-034/03L-0:on 811018,during Normal operations,1B Zone SV Fan Started Automatically.Caused by Solenoid Failure Due to Burned Out Coil in Safe Position Automatically Starting Fan & Opening Damper.Coil Replaced | |
| ML20038B022 | 16 November 1981 | LER 81-015/03L-2:on 810510,during Refueling Shutdown,Steam Flow Transmitter Was Out of Calibr Resulting in Less Conservative Hi & hi-hi Steam Flow than Required.Caused by Instrument Drift | |
| ML20011A552 | 2 October 1981 | LER 81-030/03L-0:on 810903,surveillance Procedure Found to Incorrectly Measure Shield Bldg Vent Sys Exhaust Flow from Annulus.Caused by Surveillance Procedures Written to Demonstrate Original Design Criteria | |
| ML20010F507 | 28 August 1981 | LER 81-024/03L-0:on 810730,low Boric Acid Heat Tracing Temp Detected on Section of Piping Between Boric Acid Tanks & Safety Injection Pumps.Caused by Removal of Insulation from Boric Acid Heat Tracing Circuits to Permit Maint | Boric Acid |
| ML20010F342 | 28 August 1981 | LER 81-025/03L-0:on 810807,safety Injection High Containment Pressure Setpoint Discovered to Be Less Conservative than Required by Tech Spec Due to Foxboro Containment Pressure Transmitter Out of Calibr.Caused by Instrument Drift | |
| ML20009E662 | 21 July 1981 | LER 81-023/03L-0:on 810621,boric Acid Found Leaking from Instrument Isolation Valve CVC-11188.Caused by Leaking Diaphragm & Corroded Bonnet.Transfer Pump 1A Isolated & Bonnet Assembly Replaced | Boric Acid |
| ML20009D553 | 17 July 1981 | LER 81-022/03L-0:on 810619,spent Fuel Pool Boron Sampling Not Performed within Allotted Time Frame During Steady State Operation.Caused by Temporary Work Load Increase on Chemistry Staff.Sample Taken & Analyzed | |
| ML20009C565 | 10 July 1981 | LER 81-021/03L-0:on 810611,found Visual Verification of Valve Motion & Limit Switch Not Performed During Refueling Outage for Valves Inaccessible During Normal Operation Per Iwv 3300 of 1974 ASME Code.Caused by Procedural Oversight | |
| ML20009A938 | 6 July 1981 | LER 81-020/03L-0:on 810606,condensate Water Storage Tank Level Went Below Tech Spec Limit.Caused by Normal Tank Water Usage During Startup & Turbine Testing Coincident W/ Demineralizer Regeneration | |
| ML20009A863 | 3 July 1981 | LER 81-019/03L-0:on 810605,during Refueling Outage,Portable Radiation Survey Instrument Checks for May Not Performed Per Tech Specs.Caused by Oversight Due to Reassignment of Personnel.Instruments Will Be Source Checked in June | |
| ML20009B538 | 15 June 1981 | LER 81-018/03L-0:on 810516,testing Indicated That Low Pressure Safety Injection & Reactor Trip Were Below Tech Spec Limits for Pressure Transmitters.Caused by Instrument Drift.Sensing Lines Flushed.Amplifier Replaced | |
| ML20009B535 | 12 June 1981 | LER 81-017/03L-0:on 810515,discovered That High Pressure Reactor Trip Setpoints for Pressure Transmitters Were Higher than Tech Spec.Caused by Setpoint Drift.Instruments Recalibr | |
| ML20009B533 | 12 June 1981 | LER 81-016/03L-0:on 810515,tests Indicated That Two Foxboro RCS Flow Transmitters in Loop a Were Out of Calibr.Caused by Setpoint Drift.Transmitters Recalibr | |
| ML20004F016 | 9 June 1981 | LER 81-015/03L-0:on 810510,steam Flow Transmitter Found Out of Calibr Resulting in Bi Steam Flow & hi-hi Steam Flow Trip Settings Less Conservative than Tech Spec.Caused by Instrument Drift.Transmitter Recalibr | |
| ML111661518 | 22 May 1981 | LER 81-013/03L-0:on 810422,during Facility Shutdown for Leak Rate Test,Investigation Revealed Cracked Root Weld on Vent Valve of Containment Sump B to RHR Pump 1B Piping.Caused by Sharp Blow of Unknown Origin.Repair Scheduled | |
| ML111661509 | 13 April 1981 | LER 81-010/01T-0:on 810330,nonradioactive Liquid Found Discharged from Waste Neutralizing Tank to Svc Water Pretreatment Lagoon.Caused by Error in Calculation of Allowable Discharge Rates.Proposed Tech Spec Submitted | |
| ML111661482 | 20 February 1981 | LER 81-003/03L-0:on 810122,supply Thermal Overloads Tripped During Testing of Valve CC400B (Component Cooling Water Inlet to Residual Heat Exchanger 1B).Caused by Wiring Error. Wiring Fault Identified & Corrected | |
| ML111661460 | 28 January 1981 | LER 80-044/03L-0:on 801229,noted That RCS Oxygen Sample Test Not Performed W/Frequency Required by Tech Specs.Caused by Personnel Error.Personnel Will Be Instructed in Implementation of Procedure | |
| ML19294C036 | 29 February 1980 | LER 80-005/03X-1:on 800131,during IE Bulletin 79-14 Insp, Discovered That Thermal Restraint Was Omitted from RHR Sys. Caused by Error in Transferring Piping Design to Const Drawings.Restraint Has Been Installed |