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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| 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 | |
| ML17353A614 | 28 February 1996 | Part 21 Rept 10CFR21-0073 Re Defect W/Voltage Adjust Potentiometer Mfg by Chicago Telephone Supply Used on NEI Peebles (Portec) Voltage Regulators at Plant.Util Updating Voltage Regulators W/Maury Instrument Corp Potentiometer | |
| ML17352B139 | 28 April 1995 | Part 21 Rept Re Mechanical Defect in Shaft Length of Some HEA63 Lockout Relays Mfg Between 1990-94.Defect Identified Could Possibly Result in Binding of Front Shaft.Suspect Relays Checked for Date Codes & Replacements Ordered | |
| ML17352A895 | 15 November 1994 | Part 21 Rept Re Unit 3A Sequencers at Turkey Point Plant. Unless Contacted by FP&L to Perform Programming Changes & Subsequent V&V to Sequencer Software,United Controls Plans No Other Evaluation of Defect for Listed Reason | |
| 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 | |
| ML20056D707 | 15 July 1993 | Part 21 Rept Re Reportable defect-75 PSIG Relief Check Valve 1 Npt,Emd 9521844,Kepner 416C-1-75 | |
| 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 |
| 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 | |
| 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 | |
| ML17348B441 | 23 March 1992 | Interim Part 21 Rept Re Westinghouse Reactor Vessel Head Adaptor Tube Cracking.Wog Approved Project Authorization on 920205 for Reactor Vessel Closure Head Penetration Alloy 600 Primary Water Stress Corrosion Cracking | |
| ML17348B305 | 12 December 1991 | Supplement to 910812 Part 21 Rept Re Potential Generic Defects in Abb Type RHMH2 Model RK223068-EA & 069-EA Relays. Caused by Tape Fold Back Condition.New Method for Installing Insulation Tape Initiated | |
| ML17348B043 | 16 August 1991 | Part 21 Rept Re Potential Generic Component Defect Found During Insp of Asea/Abb Type RXMH2,Model RK223068-EA & RK223069-EA Relays.Caused by Misplacement of Insulating Tape Installed on Coil Termination | |
| ML17348B292 | 12 August 1991 | Part 21 Rept Re Potential Generic Component Defect in Asea/Abb Type RXMH2 Relays.Relays Utilized in Emergency Diesel Generator Bus Load Sequences.Info Gathering Underway. Customers Will Be Notified as Soon as Possible | |
| ML17348A162 | 27 March 1990 | Part 21 Rept Re Matls W/Programmatic Defects Supplied by Dubose Steel,Inc.Customers,Purchase Order,Items & Affected Heat Numbers Listed | |
| ML20247D301 | 12 July 1989 | Part 21 Rept 10CFR21-0047 Re Control Wiring Insulation of Inner Jacket Used on General Motors Diesel Generator Sets Identified as 999 or MP Series.Encl List of Owners of Units Notified | |
| ML20207N464 | 12 October 1988 | Part 21 Rept Re Potential Problem W/Emd 20-645E4,Type 999 Excitation Sys Circuit Breaker & Wiring.Potential for Field Circuit Breaker to Trip Due to Combined Air Temps & Field Current Exists at All Plants W/Model 999 Sys | |
| ML17347A751 | 2 May 1988 | Part 21 Rept Re Component Cooling Water Sys Containment Isolation Function.Addl Evaluation of Issue in Progress as Part of Util Design Basis Effort.Ltr Sent as Formal Followup to Feb 1988 Discussion | |
| ML17261A530 | 18 June 1987 | Part 21 Rept Re Potential Util Failure to Comply W/Component Containment Isolation Licensing Commitment If Proposed Mods to Component Cooling Water Sys Instituted.Utils Advised to Evaluate Containment Isolation Sys | |
| 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 | |
| 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 | |
| ML20204E916 | 30 June 1986 | Rev 0 to Part 21 Rept JPE-L-86-75 Re Potential for Overloading Emergency Diesel Generators (EDG) Prior to Dec 1985.EDG Levels Exceed Highest FSAR Value Levels.Test Data Demonstrates That EDG Could Not Accept High Levels | Boric Acid |
| NRC-86-3142, Part 21 Rept Re Increased Failure Probability of Coils Used in Class 1E Motor Starters & Contactors Supplied to Nuclear Power Plants by Westinghouse.Replacement Coils Mfg for All Starters & Contactors on Encl List | 19 June 1986 | Part 21 Rept Re Increased Failure Probability of Coils Used in Class 1E Motor Starters & Contactors Supplied to Nuclear Power Plants by Westinghouse.Replacement Coils Mfg for All Starters & Contactors on Encl List | |
| ML20211K149 | 10 June 1986 | Part 21 Rept Re Potential for Exceeding FSAR Limits for Emergency Diesel Generator Loading Prior to Nov 1985. Justification for Continued Operation Written & Evaluation Complete | |
| ML20135E227 | 23 August 1985 | Part 21 & Deficiency Rept Re Potential Problems W/Natl Valve & Mfg Co Pipe Clamps.Initially Reported on 850613.Ltrs Sent to Purchasers of Pipe Clamps Encl for Perusal | |
| ML17340B143 | 31 March 1981 | Part 21 Rept Re Review of All Deficiency Repts Submitted to NRC for 770810-800731.Forwards LERs Determined Reportable Under 10CFR21 | |
| L-75-474, Interim Deficiency Rept Re Leaking Field Welds on Lines. Investigation Still in Progress.Next Rept Expected by 751031 | 3 October 1975 | Interim Deficiency Rept Re Leaking Field Welds on Lines. Investigation Still in Progress.Next Rept Expected by 751031 | |
| ML20084M198 | 30 May 1973 | Deficiency Rept Re Three Bent Instrument Nozzles on Reactor Coolant Pipe Spool 42-inch RC-503-01.Caused by Rigging &/Or Transportation of Spool to Reactor Containment Area.Nozzles Replaced | Hydrostatic |
| ML20084M205 | 16 May 1973 | Deficiency Rept Re HX Mods Made to Rhr,Spent Fuel Pit & Nonregenerative HX to Meet Design Flow Rates W/O Potential Vibration Problems | Flow Induced Vibration |
| ML20084M589 | 11 December 1972 | Deficiency Rept Re 720908 Unusual Event 72-1 Concerning Simultaneous Safety Injection Signal.Initially Reported on 720908.Caused by Design Deficiency in Vital 120-volt Distribution Sys.Static Inverters & Station Batteries Added |