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| Issue date | Title | Topic | |
|---|---|---|---|
| B17414, Part 21 Rept Re 980116 Failure of Tachometer Transducer,Id Number TG-25-5,during Surveillance Test.Caused by Bearing Failure Which Could Cause Shaft to Seize & Break.Removed from Svc & Replaced Failed Tachometer Transducer | 3 September 1998 | Part 21 Rept Re 980116 Failure of Tachometer Transducer,Id Number TG-25-5,during Surveillance Test.Caused by Bearing Failure Which Could Cause Shaft to Seize & Break.Removed from Svc & Replaced Failed Tachometer Transducer | Commercial Grade Dedication |
| ML18066A277 | 13 August 1998 | Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency | |
| ML20236Y123 | 7 August 1998 | Part 21 Rept Re Gas & Turbine Generator for Dedicated Emergency Power to Vital AC Buses | |
| ML20247B675 | 1 May 1998 | Part 21 Rept Re Evaluation & Notification for RELAP4 Excessive Variability at Millstone Unit 2.Caused by Small Changes in Input to RELAP4 That Can Result in Large Changes in Calculated Peak Cladding Temp.Informed NRC of Deviation | |
| ML20198E063 | 7 January 1998 | Part 21 Rept Re Shipment by Dubose National Energy Svcs,Inc, of 40 Pieces of 4 inch,90 Degree Elbows Which Did Not Meet ASME Section II SA-234 Requirements | |
| ML20211M649 | 8 October 1997 | Addenda 1 to Part 21 Rept Re Weldments on Opposed Piston & Coltec-Pielstick Emergency stand-by Diesel gen-set lube-oil & Jacket Water Piping Sys.Revised List of Potentially Affected Utils to Include Asterisked Utils,Submitted | |
| ML20211H791 | 30 September 1997 | Part 21 Rept Re Failure of Weldment Associated w/lube-oil Piping Sys on 970804 at Millstone,Unit 2.Root Cause Is Not Yet Known.Quality of Weldment Is Being Considered.Listed Util Sites Affected | |
| B16531, Part 21 Rept Re GE Commercial Grade Dedication Program Being Determined to Be Inadequate in Ability to Demonstrate Seismic Capability of Specific Relay.Returned Relays to GE Facility for Repair | 3 July 1997 | Part 21 Rept Re GE Commercial Grade Dedication Program Being Determined to Be Inadequate in Ability to Demonstrate Seismic Capability of Specific Relay.Returned Relays to GE Facility for Repair | Time of Discovery Commercial Grade Dedication Design basis earthquake |
| ML20140D658 | 6 June 1997 | Part 21 Rept Re GE Model Ifcs Relays Procured from GE Delivered W/Loose Hardware & Unsuitable for Use at Unit 1 | |
| ML20210E359 | 27 March 1997 | Part 21 Rept Re Sorrento Electronics Inc Has Determined Operation & Maint Manual May Not Adequately Define Requirements for Performing Periodic Surveillance of SR Applications.Caused by Hardware Failures.Revised RM-23A | |
| B16149, Part 21 Rept Re Cracked Fuse Ferrule Defects Due to Administrative Error in Ltr Detailing Commitments Re Issue. Corrected Copy of Commitments Associated W/Ltr Provided | 14 January 1997 | Part 21 Rept Re Cracked Fuse Ferrule Defects Due to Administrative Error in Ltr Detailing Commitments Re Issue. Corrected Copy of Commitments Associated W/Ltr Provided | |
| B16030, Part 21 Rept Re Stocked safety-related Fuses Issued from Storeroom for Installation Which Had Cracked Ferrules in Longitudinal Direction on 960911.Procurement & Warehouse Groups Completed Inspecting Fuses in Warehouse | 13 December 1996 | Part 21 Rept Re Stocked safety-related Fuses Issued from Storeroom for Installation Which Had Cracked Ferrules in Longitudinal Direction on 960911.Procurement & Warehouse Groups Completed Inspecting Fuses in Warehouse | |
| ML20134N406 | 22 November 1996 | Part 21 Rept Re Fifteen Different Fuse Types from Three Different Mfgs Found to Have Axial Cracks Due to Brass Being Susceptible to Defect.Functional Testing Should Be Performed on Sample of Fuses | |
| ML18065B011 | 18 October 1996 | Part 21 Rept Re Application of Certain Aspects of ABB-CE Safety Analysis Methodology | |
| LD-96-014, Part 21 Rept Re Response to NRC Notice on Nonconformance. Licensee Will Direct Cognizant Personnel Reviewing Deviation or Failure to Comply for Basic Components Delivered to Customers,To Document Whether/Not Facts Indicate Evaluation | 26 April 1996 | Part 21 Rept Re Response to NRC Notice on Nonconformance. Licensee Will Direct Cognizant Personnel Reviewing Deviation or Failure to Comply for Basic Components Delivered to Customers,To Document Whether/Not Facts Indicate Evaluation | |
| ML20059H772 | 17 January 1994 | Part 21 Rept Re Virginia Power Notifying Fairbands Morse Via Failure Analysis Rept NESML-Q-058 of Defective Air Start Distributor cam,16104412 | |
| ML20059F263 | 7 January 1994 | Part 21 Rept Re Air Start Distributor Cam Mfg by Fairbanks Morse.Mfg Suggests That Site Referenced in Encl App I Inspect Air Start Distributor Cam as Soon as Practical | |
| B14680, Part 21 Rept Re Substantial Safety Hazard Evaluation of RCP Turning Vane Cap Screws.Util Increased head-to Shank Fillet Radius to Reduce Stress Concentration & Reduced Thread Engagement to Reduce Axial & Bending Stiffness | 22 November 1993 | Part 21 Rept Re Substantial Safety Hazard Evaluation of RCP Turning Vane Cap Screws.Util Increased head-to Shank Fillet Radius to Reduce Stress Concentration & Reduced Thread Engagement to Reduce Axial & Bending Stiffness | Liquid penetrant |
| ML20058G598 | 17 November 1993 | Part 21 Rept Re Westronics Recorders,Model 2100C.Signal Input Transition Printed Circuit Board Assembly Redesigned to Improve Recorder Immunity to Electromagnetic Interference.List of Affected Recorders & Locations Encl | |
| ML20057G151 | 7 October 1993 | Part 21 Rept Re Westronics Model 2100C Series Recorders. Informs That Over Several Tests,Observed That Recorder Would Reset During Peak Acceleration & Door Being Forced Off Recorder.Small Retaining Clips Added to Bottom of Door | |
| B14544, Update to 900827 Rept of Substantial Safety Hazard Re GE Custom 8000 Horizontal Induction Motors,Reported Per 10CFR21 for Unit 3.Util Has Determined,As Part of Review of in 91-007 That Subj GE Motors Also Used at Units 1 & 2 | 11 August 1993 | Update to 900827 Rept of Substantial Safety Hazard Re GE Custom 8000 Horizontal Induction Motors,Reported Per 10CFR21 for Unit 3.Util Has Determined,As Part of Review of in 91-007 That Subj GE Motors Also Used at Units 1 & 2 | |
| ML20126J596 | 31 December 1992 | Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl | Hydrostatic |
| ML20085N325 | 1 November 1991 | Part 21 Rept Re Hardness Levels,In 8 of 20 Bolts in Steam Generator,W/Approx Half of Expected Value for Matl Spec. Bolts Supplied by Process Products,Ltd & Cardinal Fastener & Specialty Co.All Bolts Will Be Replaced | Commercial Grade Dedication |
| L-91-002, Supplemental Part 21 Rept Re GE Reactor Trip Breakers Used in safety-grade Equipment.Initially Reported on 901228.List of Plants Supplied w/C-E Breakers Encl | 4 January 1991 | Supplemental Part 21 Rept Re GE Reactor Trip Breakers Used in safety-grade Equipment.Initially Reported on 901228.List of Plants Supplied w/C-E Breakers Encl | |
| B13620, Part 21 Rept Re Substantial Safety Hazard Involving GE Custom 8000 Horizontal Induction Motor.Pump Motor Failure Identified Due to Loud Noise During Operation.Caused by Loosening of Clamps of Air Deflector.Damaged Motor Removed | 27 August 1990 | Part 21 Rept Re Substantial Safety Hazard Involving GE Custom 8000 Horizontal Induction Motor.Pump Motor Failure Identified Due to Loud Noise During Operation.Caused by Loosening of Clamps of Air Deflector.Damaged Motor Removed | |
| B13621, Part 21 Rept Re Substantial Safety Hazard Involving Westinghouse Veritrek Transmitters.Large Shift in Output Observed While Attempting to Calibr Two Transmitters. Internal Review Performed & Defective Transmitters Replaced | 27 August 1990 | Part 21 Rept Re Substantial Safety Hazard Involving Westinghouse Veritrek Transmitters.Large Shift in Output Observed While Attempting to Calibr Two Transmitters. Internal Review Performed & Defective Transmitters Replaced | |
| ML20043A249 | 11 May 1990 | Part 21 Rept Re Tufline Plug Valves.Metallographic Exam of Cracked Bolting Revealed That Failures Due to Igscc.Cause Not Determined.Lubricant Used Not Tested or Certified for Low Halogen Content.Addl Metallographic Exam Underway | |
| ML17223A594 | 9 March 1990 | Errata to 900126 Part 21 Rept Re Anchor/Darling Actuators Incorporating Use of Teldyne-Republic four-way Valves.Lists Plants Inadvertently Left Out in Original Rept | |
| B13253, Part 21 Rept Re Failure of Several Motor Control Starters Mfg by Telemecanique Due to Mechanical Binding in Motor Starter.Initially Reported on 890512.Failed Starters W/Units Replaced & Two Failed Starters Returned for Vendor Tests | 15 May 1989 | Part 21 Rept Re Failure of Several Motor Control Starters Mfg by Telemecanique Due to Mechanical Binding in Motor Starter.Initially Reported on 890512.Failed Starters W/Units Replaced & Two Failed Starters Returned for Vendor Tests | |
| ML20246K740 | 26 April 1989 | Part 21 Rept Re Incorrectly Stamped Name Plates on Certain Asco Nuclear Qualified Valves.Vendor Will Contact Each Affected Facility & Furnish Correctly Stamped Plates & in Near Future Discontinue Sale of Rebuild Kits for Valves | |
| ML20244D816 | 13 April 1989 | Part 21 Rept Re Failure of Rosemount Transmitters.All Failed Transmitters Replaced,Inservice Test Procedure Prepared & Monthly Test of All 12 Transmitters in RCS Throughout Cycle 2 Operation Will Be Performed.Review Continuing | Boric Acid |
| ML20153B281 | 22 February 1988 | Part 21 Rept Re Defect in Operation of Gas Monitors Using Fixed Filters.Initially Reported on 880212.Caused by Error in Software for Monitors.Vendor Testing Mod to Software & in Interim Recommends Changing Filters Every 48 H | |
| B12449, Part 21 Rept Re Noryl Plastic Insulation Deterioration on Bus Bars in Certain Metaclad Switchgear at Facility. Switchgears Used in safety-related Circuits Will Be Inspected & Repaired During Refueling Outage in Nov 1987 | 4 March 1987 | Part 21 Rept Re Noryl Plastic Insulation Deterioration on Bus Bars in Certain Metaclad Switchgear at Facility. Switchgears Used in safety-related Circuits Will Be Inspected & Repaired During Refueling Outage in Nov 1987 | |
| ML20211P721 | 23 February 1987 | Part 21 Rept Re Rockbestos Coaxial Cable Used in Sorrento Electronics Digital & Analog high-range Radiation Monitor. Insulation Resistance at High Temp Not High Enough for Ion Chamber & Associated Electronics to Operate Properly | |
| ML20211C837 | 13 February 1987 | Part 21 Rept Re Insufficient Length of Upper Adjusting Ring Retaining Pins on Dresser Main Steam Safety Valves. Initially Reported on 870211.Defective Pins Replaced | |
| ML20210F474 | 16 September 1986 | Part 21 Rept Re Possible Sticking in Closed or Partially Open Position on Dresser 3050 Diaphragm Valves.Initially Reported on 850118.Disc Caps,Including Chamfers on Outside Diameter,Will Be Modified | |
| ML20203D022 | 14 July 1986 | Part 21 Rept Re Air Monitoring Sys Probes Exhibiting Blue Tip Rather than Normal White Tip & Insensitive to Chlorine. Caused by Improper Handling/Storage.Advisory Bulletin Encl. Item Not Reportable Per Part 21 | |
| ML20206S084 | 30 June 1986 | Part 21 Rept Re Possible Cut Wires in Wire Harness of Bbc Brown Boveri K600/K800 Circuit Breakers.Initially Reported on 860509.Safety Implications Listed.Gear Guard Designed to Prevent Cut Wires | |
| B12082, Part 21 Rept Re Substantial Safety Hazard Due to Generic Defect in Ite/Brown Boveri Type K600S Circuit Breakers. Initially Reported on 860501.Mod & Repair of Breakers Continuing | 9 May 1986 | Part 21 Rept Re Substantial Safety Hazard Due to Generic Defect in Ite/Brown Boveri Type K600S Circuit Breakers. Initially Reported on 860501.Mod & Repair of Breakers Continuing | |
| ML20141D805 | 1 April 1986 | Part 21 Rept Re Model 402 Series Level Control Used for safety-related Application Shipped W/O Torque Check. Customers Will Be Notified by 860428 & Requested to Perform Torque Check.List of Plants Using Component Encl | Earthquake |
| ML20137X389 | 27 February 1986 | Part 21 Rept Re Possible Defect in Model KMG-HRH Noble Gas Radiation Monitor W/Enhanced Detector Model KDGM-HR. Initially Reported on 860222.Vendor Will Request Utils for Listed Plants to Determine If Monitors Defective | |
| ML20151Y814 | 4 February 1986 | Part 21 Rept Re Colt-Pielstick Engine Tripping Out on High Speed When Started for Test Purposes at Seabrook.Caused by Source of Air Pressure Staying On.Engines Will Be Modified to Positively Vent Air from Rack Boost Cylinder | Safe Shutdown Boric Acid Shutdown Margin Packing leak High Radiation Area Ultimate heat sink Fire Barrier Anticipated operational occurrence Hydrostatic Probabilistic Risk Assessment Operating Basis Earthquake Design basis earthquake Process Control Program Fuel cladding Pressure Boundary Leakage Grace period Power change Unidentified leakage |
| ML20137N483 | 17 January 1986 | Final Potential Significant Deficiency Rept SD-57 Re High Energy Steam Line Breaks Outside Containment.Initially Reported on 840605.Info on Impact of Break on Environ Qualification of Equipment Outside Containment Submitted | Safe Shutdown |
| ML20138K840 | 3 December 1985 | Final Part 21 & Deficiency Rept SD-41 Re Gould Type He 4 100-amp Frame Size Breaker in 480-volt Motor Control Ctr Which Failed When Pole C Did Not Close When Breaker Operated.Initially Reported on 830608.Breakers Replaced | |
| ML20137N561 | 13 November 1985 | Final Part 21 & Significant Deficiency Rept SD-82 Re Errors in Westinghouse Core Exit Thermocouple Sys.Initially Reported on 850509.New Emergency Operating Procedure Setpoints Calculated.Item Not Reportable Per 10CFR50.55(e) | |
| ML20137R029 | 13 November 1985 | Final Potential Significant Deficiency Rept SD-56 Re Undocumented Linear Indications & Excessive Geometric Unsharpness of Tubeco Weld Radiographs.Initially Identified in Insp Rept 50-423/85-14 on 831122.Weldments Repaired | Nondestructive Examination |
| ML20137S098 | 12 November 1985 | Final Potential Significant Deficiency Rept SD-89 Re Binding of Telemecanique (Formerly Gould) Starter Contact Carrier Assemblies.Initially Reported on 851014.Size 1 & 2 Starters Being Inspected.Vendor Has Supplied Retrofit Kits | |
| ML20137N510 | 12 November 1985 | Final Potential Significant Deficiency Rept SD-75 Re Nonconforming Terminations in CVI Corp Equipment.Initially Reported on 850213.Insp of Lugs Completed.Deficient Terminations Repaired or Replaced | |
| ML20198F742 | 1 November 1985 | Final Part 21 & Deficiency Rept SD-25 Re Failure of Pinion Gear Shear Keys in Limitorque Model SBO Motor Operated Valves.Initially Reported on 820903.Westinghouse Determined Item Not Reportable Per 10CFR50.55(e) | |
| ML20198F704 | 1 November 1985 | Deficiency Rept SD-56 Re Tubeco Weld Radiographs.Initially Reported on 840618.Review of Tubeco Radiographs for QA Category I,Asme III Code Class 1,2 & 3 Welds Complete.Final Rept Will Be Provided by 851113 | Nondestructive Examination |