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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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

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