Semantic search
Jump to navigation
Jump to search
| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| ML20064J580 | 8 November 1982 | Part 21 Rept Re Matl That May Not Be in Compliance W/ 10CFR50,App B,Section Viii Requirements.Matl Supplied to Ne Public Power District & Omaha Public Power District.Qa Depts Contacted Re Resolution of Nonconformance Situation | |
| ML20065C724 | 10 September 1982 | Part 21 Rept Re Contaminants in Snubber Hydraulic Fluid. Initially Reported on 820323.Program Developed in Which Fluid Reservoirs Completely Flushed Prior to Filling W/Fresh Fluid.Containment Snubbers to Be Rebuilt by 821001 | |
| ML20072A769 | 8 August 1994 | Interim Part 21 Rept 2 Re Weak Link Analysis for Movs.No Evidence to Support Fact of Erroneous Data Discovered. Investigation Continuing | Weak link |
| ML20076M832 | 28 October 1994 | Submits Followup to 940516 Part 21 Rept Informing of Investigation to Determine Data Supplied in mid-80 Used by Nuclear Utilities to Set Torque Switches in MOV | Weak link |
| ML20078F584 | 27 January 1995 | Part 21 Rept Re Vendor Using Incorrect Acceptance Criteria on Qualification Test Rept & Acceptance Criteria Used Not Not Met by Cvts.Vendor Continues to Seek Resolution of Matter | |
| ML20079L491 | 29 October 1991 | Part 21 & Deficiency Rept 158 Re Potential Defect in Component of DSRV-16-4 Standby Diesel Generator Sys. Drawing Rev to Increase Gear Tooth Hardness Completed. Recommended Corrective Actions for Sites Listed | |
| ML20080G327 | 30 January 1995 | Part 21 Rept Re Furnished Commercial grade/non-safety Related Studs,Nuts & Washers for Use on safety-related Crystal River 5th Yr post-tension Surveillance Program | Commercial Grade Dedication Commercial Grade |
| ML20085J411 | 10 October 1983 | Part 21 Rept Re Apparent Increase in Scope of Fraudulent & Substandard Activities by Unscrupulous Suppliers.Reliability Emphasized | |
| ML20094F521 | 18 February 1992 | Part 21 Rept Re Defect in Amot Control Corp Safety Trip Valves for Use in Edgs.Defective Overspeed Trip Valve Removed from DG 1.Replacement & Existing Amot Overspeed Trip Valve on DG 2 Inspected & Determined Not to Contain Defect | |
| ML20094J468 | 2 March 1992 | Part 21 Rept Re Amot Valve (Amot Part 1476B0212A3).Valve Originally Supplied as Part Number 2-05V-153-004 in Overspeed Shutdown Assembly KSV-72-7.Production of Valve Discontinued & Advises That Alternate Assemble Available | |
| ML20101M892 | 30 June 1992 | Initial Part 21 Rept Re non-segregated Phase Electrical Bus Duct Mfg in 1972.Initially Reported on 920427.Detailed Calculations Being Done by FPC to Evaluate Momentary Fault Current Against Supplied Ratings of All Bus Sections | |
| ML20101N844 | 5 April 1996 | Interim Part 21 Rept Re Potential Safety Concern on Matl for Fabrication of Permanent Canal Seal Plate.Licensee Will Provide Final Rept to NRC in Approx Six Months Upon Completion of Evaluation of Welds | Commercial Grade |
| ML20118B219 | 23 September 1992 | Suppl to Part 21 Rept Re Potential Deviation in Some Bailey Controls Co 88 Series Modules,Transmitted Via .One Module Found Incapable of Reaching 100% Output at Max Rated Load.Recommends That Circuit Board Assemblies Be Inspected | |
| 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 |
| ML20126B042 | 17 December 1992 | Final Part 21 Rept Re Potential Problem W/Steel Cylinder Heads.Initially Reported on 921125.Caused by Inadequate Cast Wall Thickness at 3/4-inch-10 Bolt Hole.Stud at Location Indicated on Encl Sketch Should Be Removed | Loctite |
| ML20126C690 | 5 June 1985 | Part 21 Rept Re Generator Failure.Concurs W/Encl Louis Allis That Interpolar Connectors Be Removed | |
| ML20127H230 | 15 January 1993 | Part 21 Rept Re Potential Defeat in Component of Dsrv & Dsr Enterprise Standby DG Sys.Starting Air Distributor Housing Assemblies Installed as Replacement Parts at Listed Sites | |
| ML20127H541 | 17 May 1985 | Part 21 Rept Re Potential Defect in Engine Generator Control Panels of Dsr or DSRV-16 Standby Diesel Generator.Review of Generator Control Panel Installation by Each Facility Recommended | |
| 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 | |
| ML20132B026 | 3 September 1985 | Part 21 Rept Re Possibility of Engine Ingestion of Unwelded Part in American Air Filter Standby Diesel Generator Intake Silencer.Immediate Hold Should Be Placed on Diesel Engines/Intake Silencers Not Yet in Svc | |
| 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 | |
| ML20134B230 | 24 January 1997 | Final Part 21 Rept Re Potential Safety Concern on Matl Used for Fabrication of Permanent Canal Seal Plate.Correpondence W/Fabricator & Matl Supplier Documents Tig Automated Welding Process Used to Fabricate Angle Pieces | Commercial Grade |
| ML20134M771 | 29 August 1985 | Part 21 Rept Re Potential for Four Valves in HPI Lines to Become Inoperable If Postulated Single Failure Resulted in Total Loss of Cable Tray.Six Cables for Two Valves in HPI Line Removed from Tray & Routed Through Separate Conduits | |
| ML20136A939 | 8 November 1985 | Part 21 & Deficiency Rept Re Rev B to Rosemont Instruction Manual 4302 Not Addressing Zero Shift Due to Process Pressure in Model 1153 Alphaline Nuclear Pressure Transmitter | |
| ML20136B022 | 8 November 1985 | Part 21 & Deficiency Rept Re Unreliable Porthole Oil Level Gauge for Auxiliary Feedwater Pumps Supplied by B&W.Metal Insert Behind Sight Glass Trapped Oil Causing False Level Indication.Metal Insert Removed | |
| ML20137G626 | 25 March 1997 | Svcs Part 21 Rept Re Emergency Generators Installed at Zion Station Which Developed Significant Drop in Crankcase Lube Oil Level.Caused by Crack in Liner Wall,Allowing Jacket Water to Enter Chamber | Finite Element Analysis |
| ML20137X389 | 27 February 1986 | Part 21 Rept Re Possible Defect in Model KMG-HRH Noble Gas Radiation Monitor W/Enhanced Detector Model KDGM-HR. Initially Reported on 860222.Vendor Will Request Utils for Listed Plants to Determine If Monitors Defective | |
| 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 | |
| ML20140A966 | 29 May 1997 | Part 21 Rept Re Ksv Emergency Diesel Generator Power Piston Failure.Caused by Jacket Water in Combustion Chamber. Recommends That Users Verify That Crown Thickness at Valve Cutout Be 100 Minimum | Finite Element Analysis |
| ML20140G448 | 1 May 1997 | Part 21 Rept Re Potential Defect in Component of Dsrv & Dsr Enterprise Standby Diesel Generator Sys.Recommends That Springs Be Inspected on Periodic Basis,Such as During Refueling Outages | |
| ML20151J500 | 7 April 1988 | Part 21 & Deficiency Rept 88-02 Re Improper Mounting of Armature Button on Undervoltage Device Armature.Maint Procedure for CRD Trip Breaker Revised to Include Checks for Defects Discovered W/Undervoltage Device | |
| 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 | |
| ML20153B619 | 29 April 1988 | Part 21 Rept Re Potential Defect in Component of Dsr or Dsrv Standby Diesel Generators Supplied to Utils.Recommends Return of Subj Components in Onsite Warehouse Storage & Suggests Surveillance of Devices Already Installed | |
| ML20154A878 | 9 May 1988 | Rev 1 to Part 21 & Deficiency Rept 88-02 Re Improper Mounting of Armature Button on Undervoltage Device Armature. CRD Trip Breaker Removed from Svc & Placed in QC Quarantine & Maint Procedure Revised for Armature Defect | |
| ML20154J410 | 12 May 1988 | Addendum 1 to Supplemental Part 21 Rept 145 Re Potential Problem w/F-573-156 Pressure Sensor/Lube Oil Trip.Initially Reported on 880429.Addl 1-1/8-inch Diameter W/Deep Counterbone in Pressure Head Added to Activate Valve | |
| ML20154N343 | 10 March 1986 | Initial Part 21 Rept 135 Re Potential Problem W/Lube Oil Sump Tank Foot Valve of Dsrv Standby Diesel Generator for Facilities.Cause Not Determined.Recommends Utils Inspect Condition of Foot Valve Liners & Notify Tdi of Findings | |
| ML20155A028 | 27 March 1986 | Part 21 Rept Re Crystal River Shaft Fracture.Addl Info Will Be Submitted When Failure Analyses & Recommendations Completed.W/O Stated Encl | |
| ML20155C409 | 16 May 1988 | Part 21 Rept 88-03 Re Potential Problem W/Gems Sensors Model 63328A Modular Receivers.Modular Receivers Qualified Toggle Switch Installed | Commercial Grade Dedication |
| ML20195D217 | 27 May 1986 | Rev 1 to Part 21 Rept Re Dowel Displacement on Connecting Rod Bearings Purchased During Nov 1985 - Apr 1986.Initially Reported on 860421.Rod Bearings Will Be Inspected Dimensionally.Further Info Forthcoming | |
| ML20196D628 | 10 February 1988 | Part 21 Rept Re Potential Defect in Certain Model RTF-480/120-30 Ac Line Regulating Transformers Involving Nuisance Tripping of 100 Ampere Ac Input Circuit Breaker When Initializing Unit.Breaker Should Be Replaced | |
| ML20198C498 | 6 November 1985 | Part 21 Rept Re Potential Defect in Dsr or Dsrv Standby Diesel Generator Intake & Exhaust Valve Springs Mfg by Betts Spring Co.Users Recommended to Inspect Engines for Broken Springs & Identify Original Mfg | |
| 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 | |
| ML20205B840 | 30 July 1986 | Part 21 Rept Re Chattering of Wilmar Electronics Underpower monitor-type Relay Circuit Boards,Model 21-171.Caused by Overheated Components,Damaged Circuit Boards & Bad Solder Connections.Defective Relay Replaced | |
| ML20205C689 | 17 September 1985 | Part 21 Rept Re Potential Defect in Centerline,Inc Lube Oil Check Valves of Dsr Standby Diesel Generator Which Could Result in Engine Nonavailability.Valve Seat Matl Will Be Changed to Buna N.List of Tdi Part 21 Repts Encl | |
| ML20205F321 | 10 October 1988 | Part 21 Rept Re Potential Deviation from Tech Spec Concerning Ry Indicators Due to Operating Temp Effect on Analog Meter Movement.Initially Reported on 881006.Customers Verbally Notified on 881006-07 | |
| ML20205R585 | 31 March 1987 | Part 21 & Deficiency Rept 139 Re Potential Defect in Engine Control Panel Shutdown Circuitry of Dsr & Dsrv Standby Diesel Generator.Corrective Action at Vogtle Already Implemented.Mfg Will Work W/Smud to Implement Mods | |
| ML20206Q649 | 6 April 1987 | Part 21 Rept 87-05 Re Possible Loss or Degradation of Reactor Protection Sys Channels a & B or C & D Due to Common Amplifier Failure.Initially Reported on 870403.Caused by B&W Design Error.Isolation Amplifiers Will Be Used |