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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20206N321 | 7 December 1998 | Final Part 21 Rept Re Piston Failure of MSIV Actuator at Daec.Rept Indicates That No Reportable Defect Exists,Per 10CFR21 | Finite Element Analysis |
| ML17354B097 | 9 September 1998 | Part 21 Rept Re Possible Machining Defect in Certain One Inch Stainless Steel Swagelok Front Ferrules,Part Number SS-1613-1.Caused by Tubing Slipping Out of Fitting at Three Times Working Pressure of Tubing.Notified Affected Utils | |
| ML20247P565 | 18 May 1998 | Part 21 Rept Re Model SA-A101 MSIV A' Actuator Showing Evidence of Internal Leakage,In Both Directions Past Pneumatic Piston.Situation Being Reviewed to Determine If Failure Could Pose Substantial Safety Hazard | |
| 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 | |
| ML20115F247 | 3 July 1996 | Part 21 Rept Re Piping (Small Portion of Unmelted Matl Drawn Lengthwise Into Bar During Drawing Process) Defect That Existed in Bar as Received from Mill.Addl Insp Procedure for Raw Matl Instituted | |
| NG-94-1150, Part 21 Rept Re Defect Identified W/ C RHR Pump Motor from Daec.Pump Performance Degraded.Installed New Shaft Rotating Element,Wear Ring & Hydrostatic Bearing & Replaced Pump Mechanical Seal & Motor Thrust | 28 March 1994 | Part 21 Rept Re Defect Identified W/ C RHR Pump Motor from Daec.Pump Performance Degraded.Installed New Shaft Rotating Element,Wear Ring & Hydrostatic Bearing & Replaced Pump Mechanical Seal & Motor Thrust | Hydrostatic |
| 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 | |
| ML20127H382 | 8 January 1993 | Part 21 Rept Re Possible Defect in Forging Shipped to Facility.Fitting of Body May Have Nonmettalic Matl Which Could Cause Body to Crack Upon pull-up.Computer Note Received from Crawford Fitting Co Encl | |
| ML20115G800 | 22 October 1992 | Part 21 Rept Re Possible Defect in Raw Matl in Body of Male Elbow Part SS-600-2-6,heat Code Eby.Remaining Stock Should Be Checked to Verify That Subj Heat Code Not on Hand. Vendor Will Replace Unused SS-400-3 Ebys on Hand | |
| ML20114G003 | 30 September 1992 | Part 21 Rept Re Defect in Raw Matl in Swagelok Union Tee Fitting Assemblies for Svc.Defect Causes Fitting Body to Fail Immediately Upon Pulling Up Nut 1-1/4 Turns.When Nut Removed,Crack Visable.Offers Replacement of Defective Part | |
| ML20090L880 | 18 March 1992 | Part 21 Re Cracked Piston Castings Received from Acme Foundry,Fairbanks Morse & General Casting.Magnetic Particle Insp of All Pistons Will Be Performed.List of Affected Plants Encl | |
| 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 | |
| ML20234C735 | 23 June 1987 | Supplemental Part 21 Rept Re Silicone Foam Seal Anomolies at Wolf Creek Generating Station | Fire Watch |
| ML20209A877 | 21 April 1987 | Part 21 Rept Re Selected Welds Performed on Alternate Shutdown Panels W/O Benefit of Qualified Weld Procedure Specs.Matter Under Investigation & Qualifications Being Prepared | |
| ML20215G680 | 10 October 1986 | Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing | Stroke time |
| ML20215G535 | 10 October 1986 | Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing | Stroke time |
| 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 | |
| ML20154K361 | 5 March 1986 | Part 21 Rept Re Possible Wiring Defect in Fabricated Primer Chamber Assemblies for Standby Liquid Control Valves. Initially Reported on 860214.Listed Corrective Actions Will Be Completed by 860328 | |
| ML20140A528 | 19 December 1985 | Part 21 Rept Forwarding Ltr Sent to Customers Re Check Valves Missing Lock Welds on Hinge Supports or Hinge Support Capscrews,Per 851121 Request.List of Customers Receiving Ltr Also Encl | |
| ML20210G992 | 13 August 1985 | Part 21 Rept Re Failure of Isolated Worm Shaft Gear When Certain Critical Speeds Combined W/Repetitive Transfer of Actuator Clutch Mechanism from Manual (Handwheel) to Motor Drive Mode.Two Possible Solutions Noted | |
| ML20126C690 | 5 June 1985 | Part 21 Rept Re Generator Failure.Concurs W/Encl Louis Allis That Interpolar Connectors Be Removed | |
| ML20100K974 | 12 April 1985 | Part 21 Rept Re Malfunction in X-SAM Safety Sys Supplied Per Topical Rept on Nuclear safety-related Crane Being Installed in England.Air Pressure Being Used to Release Brake Abnormally Low Due to Valve Malfunction |