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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| 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 | |
| ML20043A609 | 27 April 1990 | Part 21 Rept Re Defective Axial Cracks in Pump Shaft in Region Immediately Above Impeller & in Reactor Recirculation Pumps.Probably Caused by Crack Growth as Thermal Fatigue. Technical Advisory Bulletin Will Be Sent to Each Util | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| ML20077H705 | 4 August 1983 | Part 21 Rept Re 75 Components (Part P2073A) Lacking Conformance to Specs for Size & Fusion.Initially Reported on 830718.Conditions Which Allowed Erroneous Shipment Corrected | |
| ML20083L975 | 27 May 1983 | Part 21 Rept Re Failure of Circuit Breakers During Environ Testing.Test Results Indicate That Temp Sensitivity Problem May Be Generic to All Ite Imperial Corp thermal-magnetic Circuit Breakers Calibr for 40 C Svc | |
| 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 | |
| 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 | |
| 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 | |
| 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 |
| 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 |
| 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 |
| 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 | |
| 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 | |
| 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 | |
| ML20086Q615 | 7 December 1972 | Interim Significant Deficiency Rept SDR 3 Re Main Steam Line Restraints.Caused by Design Error.Field Welding Problem Resolved by Using Improved Heaters to Attain Required Weld Preheat.Indepth Matl Testing Program Underway | |
| ML20086Q914 | 11 July 1972 | Interim Deficiency Rept Re Flood Damage to Equipment.Caused by Tropical Disturbance Agnes. Submerged Motors Will Be Replaced or Reworked to Reestablish Motor Warranties.No Radioactive Matls Released | |
| ML20086Q918 | 19 July 1972 | Interim Deficiency Rept Re Flood Damage of Equipment at Warehouse.Caused by Tropical Disturbance Agnes. Util Will Submit Detailed Rept When Inventory & Assessment of Damage Complete & When Corrective Action Determined | |
| ML20086Q933 | 11 July 1972 | Interim Deficiency Rept Re Flood Damage to Equipment.Caused by Tropical Disturbance Agnes. Detailed Rept of Damage to Three Motors in Radwaste Bldg Will Be Submitted After Supplier Evaluates Extent of Damage | |
| 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 | |
| ML20086Q987 | 16 August 1972 | Supplementary Interim Deficiency Rept Re Damage to Reactor Pressure Vessel Top Fuel Guide Pin.Initially Reported on 720622.Guide Unrated.Dimensional Checks Made Which Indicate Indicate Bent Member.Next Rept by Dec 1972 | |
| ML20086Q996 | 7 July 1972 | Interim Deficiency Rept Re Damage to Reactor Pressure Vessel Top Fuel Guide.Initially Reported on 720622.Mfg Representatives Contacted & Will Assess Damage.Rept Expected by Aug 1972 | |
| 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 | |
| ML20090H850 | 20 July 1984 | Supplemental Part 21 Rept Re Two Laminar Type Discontinuties Noted in Tioga Pipe Supply Co 18-inch Carbon Steel Pipes. Corrective Action Rept M-27 Issued to Bechtel on 840705 Requesting Identification of Cause | |
| 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 | |
| ML20090L729 | 1 October 1974 | Deficiency Rept Re Potential Seal Failures Found in Bergen-Paterson Snubbers Installed at Several Bwrs.Fittings W/Ethylene Propylene Flaps Made Available for Future Snubber Maint | |
| ML20095G601 | 22 August 1984 | Part 21 Rept Re Defects in 18-inch SA-333 RHR Pipe.Samples of Defective Pipe Matl Being Shipped to Techninat Corp,Per Request.Defects Located in One Length of SA-333 Grade 6 Pipe | |
| ML20096F592 | 11 May 1992 | Followup to 920417 Part 21 Rept 10CFR21-0062 Re Failed Shaft in DG W/Emd 645 Series Engines Using Turbochargers Remanufactured from May 1991 to Jan 1992.Turbochargers Should Be Removed & Returned to EMD for Insp/Repair | |
| 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 | |
| ML20113A429 | 11 January 1985 | Part 21 Rept Re Incorrect Insulating Tape.Instructions Governing Handling of Incoming Matls Fully Adequate & If Followed,Would Have Prevented Error | |
| 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 | |
| ML20116N614 | 3 May 1985 | Part 21 & Deficiency Rept SSH-M-85/01 Re Defective Circuit Breakers for Recombiners Supplied by Rockwell Intl.Initially Reported on 841124.Equipment Deficiencies Corrected Prior to Installation.Rockwell Intl Requested to Follow Up Action | |
| 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 | |
| ML20125C716 | 7 December 1992 | Part 21 Rept Re Possibility for Malfunction of Declutching Mechanisms in SMB/SB-000 & SMB/SB/SBD-00 Actuators. Malfunction Only Occurs During Seismic Event.Balanced Levers May Be Purchased from Vendor.List of Affected Utils Encl | Stroke time Anchor Darling |
| ML20126C690 | 5 June 1985 | Part 21 Rept Re Generator Failure.Concurs W/Encl Louis Allis That Interpolar Connectors Be Removed | |
| 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 | |
| ML20127P586 | 23 November 1992 | Followup to 921005 Part 21 Rept Re Potential Defect in SB/SBD-1 Housing Cover Screws.Procedure Re Replacement of SBD-1 Spring Cover Bolts Encl.All Fasteners Should Be Loosened & Removed.List of Affected Utils Encl |