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Issue date | Title | Topic | |
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LD-97-031, Part 21 Rept Re Incorrect Nut & Washer Plate Matl for ECCS Suction Strainer Bolted Connections.Nut Plates & Washer Plates Fabricated from Incorrect Matl & Delivered to Peach Bottom Unit 3 Site.Nut & Washer Plates Never Installed | 30 October 1997 | Part 21 Rept Re Incorrect Nut & Washer Plate Matl for ECCS Suction Strainer Bolted Connections.Nut Plates & Washer Plates Fabricated from Incorrect Matl & Delivered to Peach Bottom Unit 3 Site.Nut & Washer Plates Never Installed | |
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 | |
ML20140A476 | 27 May 1997 | Provides Addl Info to 970429 Part 21 Rept Re Potential safety-related Problem W/Asco HV 266000-007J Scram Solenoid Pilot Valves.Corrective Actions Also Listed | |
ML20133E800 | 8 January 1997 | Deficiency Rept Re Nonconformance Related to Masterflow 713 Grout,Which Master Builders,Inc Has Supplied as Nuclear SR Product to 18 Npps.Cause Unknown.Requests That Listed Info Be Provided to Gain Insight as to Scope & Possible Cause | |
ML20086T176 | 19 July 1995 | Part 21 Rept Re Potential Problem W/Type 51's & 87T Relays. Potential Problem Identified as Defective Tap Block. Recommends That Users Identified on Attachment 1 Page Verify Testing Per Instruction Listed on Encl Product Advisory Ltr | |
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 | |
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 | |
ML20059L986 | 11 November 1993 | Part 21 Rept Re Deviation Wherein Fully Open Butterfly Valve Located 15 Pipe Diameters Upstream of Sensors Was Disturbing Flow Profile Enough to Cause Ultrasonic Meter to Indicate 3 to 4% Low.Customers Notified & Valve Removed | |
ML20116L512 | 9 October 1992 | Part 21 Rept Re safety-related RHR Pump Motor Fan Failure Due to Lack of Weld Penetration Between Fan Blades & Discs. New Duplicate GE Motors Mfg by GE Canada,Motors & Drive Dept.New Surplus Motors Have Double Fillet Welds | |
ML20118B439 | 11 September 1992 | Part 21 Rept Re Degradation in Abb Type 27N Undervoltage Relays Used in Electrical Switchgear.Recommends That Users Review Applications Requiring Exposures Greater than 1E03 Rads TID W/Time Delay Function Option | |
ML20005G683 | 5 January 1990 | Part 21 Rept Re Installation Instructions for Grommet Use Range for Patel Conduit Seal P/N 841206.Conduit Seals in Environ Qualification Applications Inspected for Proper Wire Use Range & Grommets Replaced | |
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 | |
ML20151M737 | 29 July 1988 | Part 21 Rept Re Discovery of Cooper Contamination in 125- Volt Station Batteries.Cooper Contamination Could Result in Lowering of Cell Voltage or Negative Plate Voltage W/ Reduction in Battery Capacity | Safe Shutdown |
ML20236F491 | 19 October 1987 | Part 21 Rept on QA Controls Re NDE Records Utilized by Eastern Testing & Insp,Inc During Performance of NDE Svcs at Facility.Names of Individuals Informing NRC & Identification of Basic Svcs Containing Defect Provided | Non-Destructive Examination Liquid penetrant |
ML20204B362 | 19 March 1987 | Part 21 & Deficiency Rept Re Reactor Protection Sys Power Supply Circuit Breaker Deficiencies.Initially Reported on 860616.Unit 3 Mods Complete.Unit 2 Mods,To Be Completed During Spring 1987 Outage,Currently in Progress | |
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 | |
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 | |
ML20211P511 | 16 June 1986 | Part 21 Rept Re Failures of Shunt Trip Coils on Westinghouse Circuit Breakers in Reactor Protection Sys.Initially Reported on 860609.Breakers Replaced,Operation Aids (Labels) Added & Equipment Modified.Related Correspondence | |
ML20203C526 | 14 April 1986 | Part 21 Rept Re Defect in Westinghouse Circuit Breakers Type Lbb,Catalog Number LBB22250 W/Factory Installed 125-volt Dc Shunt Trip.Defect Could Result in Burning Out Shunt Trip Coil | |
ML20155F238 | 13 March 1986 | Part 21 & Deficiency Rept Re Failure of Clow Corp Containment Isolation & Vacuum Relief Valves in torus-to-vacuum Breaker Lines.Bearings Being Replaced W/ Different Matl.Related Correspondence | Stroke time |
ML20154A374 | 24 February 1986 | Part 21 Rept Re Failure of Diesel Engine E-2 Air Blower. Generator Disassembled for Removal of Aluminum Fragments & Replacement of Colt Industries,Inc Turbochargers,Roots Blower & Piston Rings | |
ML20133N469 | 5 August 1985 | Part 21 Rept Re Raychem Wcsf Shrink Sleeving for Sensor/ Connecting Assembly of Safety Relief Valve Monitoring Sys. Testing & Retesting in Progress.Sensor Installation Utilizing Shrink Sleeving Recommended | |
ML20126C690 | 5 June 1985 | Part 21 Rept Re Generator Failure.Concurs W/Encl Louis Allis That Interpolar Connectors Be Removed | |
ML20129G440 | 29 May 1985 | Part 21 Rept Re Failure of Inner Polar Connector Between Damper Bar Circuit on Generator Main Field.Cause of Failure Not Defined.Further Investigation Necessary | |
ML20127N062 | 13 May 1985 | Part 21 Rept Re Incorrect Short Time Delay Band Lever Inadequately Installed in Low Voltage K-line Circuit Breaker Electromechanical Overcurrent Trip Device.Visual Insp to Determine If Correct Lever Installed Recommended | |
ML20112C649 | 14 March 1985 | Part 21 & Deficiency Rept Re Inadequate Designed Clamps. Initially Reported on 850314.Spring Disc Washers Required in Clamp Design Shipped to Site,Assembly Drawings Revised to Include Spring Disc & Installation Procedure Made | |
ML20072N989 | 8 July 1983 | Interim Part 21 Rept Confirming 830705 Telcon Re Anomalies in Artificially Aged Apparatus (Using Ahrrenius Methodology W/Elevated Temp Aging).Deficiency Found During Qualification Testing for IEEE 323-1974.Draft Notices Encl | |
ML20069H065 | 23 March 1983 | Part 21 Rept Re Discovery of Failed Switch Operator Cam 14 within Position Selector Switch 4,operating ECCS Pump Room Cooler.Initially Reported on 830104.Caused by Cam Matl Fracturing Into Small Pieces.Jumpers Installed | |
ML20086F069 | 15 July 1977 | Interim Deficiency Rept Re Welding Deficiencies on Embeds. Initially Reported on 770616.Caused by Improper Weld Joint Preparation.Personnel Instructed in Proper Interpretation of Welding Symbols on Design Drawings | |
ML20086F073 | 1 July 1977 | Interim Significant Deficiency Rept 2 Re Structural Steel Defects.Initially Reported on 770111.Final Rept Will Be Submitted on 770801 Rather than 770701 | |
ML20086F110 | 1 April 1977 | Interim Significant Deficiency Rept 2 Re Structural Steel Defects.Initially Reported on 770111.Caused by Improper Flange Trimming Operations,Failure to Properly Prepare Cope for Repair Welding & Deficient Repair Welding | |
ML20086F161 | 11 January 1977 | Forwards Significant Deficiency Rept 2 Re Discovery of Cracks in Plate Girders Located in Reactor Bldgs.Initially Reported on 761209.Hold Placed on Const Activities That May Impose Substantial Addl Loads.Final Rept by 770401 | Nondestructive Examination |
ML20085E765 | 5 August 1976 | Final Deficiency Rept Re Incorrect Installation of Reactor Pressure Vessel (RPV) Seismic Stabilizer Plates.Initially Reported on 760513.Formal QA Program Developed & Implemented Since Pvs Stabilizer Assembly Installed | |
ML20090L521 | 3 October 1974 | Significant Deficiency Rept SDR5 Re High Pressure Svc Water Valve Weld Failure.Initially Reported on 730601.Vendor Weld Stress Analysis Calculations Reviewed & Table of Acceptable Weld Sizes Prepared | |
ML20086L030 | 20 May 1974 | Final Deficiency Rept Re Main Steam Line piping-external Surface Indications.Caused by Hot Tears in High Strain Areas of Pipe Induced During,Bending Process.Program for Exam of High Strain Areas Implemented | Hydrostatic |
ML20086Q524 | 15 May 1974 | Final Significant Deficiency Rept SDR 4 Re Core Spray Sparger.Core Spray Sparger Removed & Shipped to Reactor Controls,Inc for Rework to Meet NSSS Supplier Requirements & Reinstalled in Vessel | |
ML20086L039 | 6 February 1974 | Interim Significant Deficiency Rept Re Main Steam Line piping-external Surface Indications.Caused by Hot Tears in High Strain Area of Pipe Induced During Bending Process. Program for Exam of Piping Being Implemented | |
ML20086Q195 | 25 October 1973 | Final Significant Deficiency Rept SDR-1 Re Reactor Pressure Vessel Top Fuel Guide.Nicks & Scratches on Beam B Were Ground Flush to Surface.Beam a Replaced | Liquid penetrant |
ML20084A027 | 1 October 1973 | Significant Deficiency Rept SDR-5 Re Weld Failure on High Pressure Svc Water Valve.Initially Reported on 730601.Eight Failed Valves Identified.All Valves Returned to Vendor for Rework to Eliminate Shims | |
ML20085M390 | 1 October 1973 | Significant Deficiency Rept Re Weld Failure on High Pressure Svc Water Valve in Unit 2.Initially Reported on 730601. Vendor Weld Stress Analysis Calculations Reviewed.Table of Acceptable Weld Sizes Prepared | |
ML20086Q406 | 19 July 1973 | Significant Deficiency Rept SDR 6 Re Blistering of Coating on Torus.Caused by Unavoidable Overlapping of Phenolic Sys During Application.All Loose,Phenolic Finish Coat Removed & Care Taken Not to Disturb Condition of Primer | |
ML20086Q500 | 28 June 1973 | Interim Significant Deficiency Rept SDR 5 Re High Pressure Svc Water Valve Weld Failure.Caused by Insufficient Fillet Weld Throat Dimension.Valves Reworked to Eliminate Shims & Mounting Plates Rewelded | |
ML20086Q528 | 13 June 1973 | Supplementary Interim Significant Deficiency Rept SDR 4 Re Core Spray Sparger.Rept Will Be Submitted on 730901 Instead of 730701 | |
ML20086Q543 | 2 May 1973 | Interim Significant Deficiency Rept SDR 4 Re Core Spray Sparger.Core Spray Sparger Removed & Shipped to Reactor Controls,Inc for Rework to Meet GE Ape Design Requirements | |
ML20086Q598 | 23 March 1973 | Final Significant Deficiency Rept SDR 3 Re Main Steam Line Restraints.Caused by Design Error.Affected Restraints Will Be Abandoned & Replaced W/Restraints Designed to Original Criteria & Allowable Stresses | |
ML20086Q603 | 1 February 1973 | Supplementary Interim Significant Deficiency Rept SDR 3 Re Main Steam Line Restraints.Restraints Will Be Replaced.Rept Discussing Replacement & New Design Will Be Submitted by 730306 | |
ML20086Q969 | 22 December 1972 | Supplementary Interim Deficiency Rept Re Damage to Vessel Top Fuel Guide.Results of Evaluation Being Evaluated & Corrective Action Being Determined.Rept Wil Be Submitted in Feb 1973 |