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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| ML20058K384 | 9 December 1993 | Part 21 Rept Re Potential Defect in Component of Dsrv & Dsr Enterprise Standby DG Sys,Regarding Potential Problem W/ Subcover Assembled Atop Power Head | |
| 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 | |
| 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 |
| 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 | |
| ML17348B506 | 9 October 1990 | Part 21 Rept Re Zener Diode VR2 on Power Supply Board 9 1682 00 106 Possibly Being Installed Backwards | |
| ML20248E012 | 13 September 1989 | Supplemental Part 21 Rept Re Potential Problem W/Six Specific Engine Control Devices in Air Start,Lube Oil, Jacket Water & Crankcase Sys.Initially Reported on 890429. California Controls Co Will Redesign Valve Seating | |
| ML20245B665 | 15 June 1989 | Part 21 Rept 150 Re Potential Defect in Component of Dsr Standby Diesel Generator.Cause of Failure Determined to Be Combination of Insufficient Lubrication to Bushings.Listed Course of Action Recommended at Next Scheduled Engine Maint | |
| 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 | |
| CEO-88-113, Part 21 Rept Re Mfg Defect W/Gould Model PD3200 Pressure Transmitters.Three Failed Units Removed from Svc & Returned to Mfg for Analysis.Engineering Action Plan Formulated to Monitor Subj Transmitters & Replace Any Defective Devices | 8 August 1988 | Part 21 Rept Re Mfg Defect W/Gould Model PD3200 Pressure Transmitters.Three Failed Units Removed from Svc & Returned to Mfg for Analysis.Engineering Action Plan Formulated to Monitor Subj Transmitters & Replace Any Defective Devices | |
| 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 |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| ML20237G578 | 7 August 1987 | Part 21 & Deficiency Rept 142 Re Defect in Starting Air Distributor Sys of Dsr Standby Diesel Generator.Drain Sys Will Be Permanently Installed in Start Air Distributor | |
| ML20236N713 | 5 August 1987 | Part 21 Rept Re Potential Problem W/Vibration in Lube Oil & Jacket Water Sys.At Rancho Seco Site,Fatigue Cracks Found in Welds of Support Members in Lubricating Oil Sys.Cracks Due to Vibration in Lube Oil Sys.Addl Preventive Action Taken | |
| ML20236M958 | 20 July 1987 | Part 21 Rept 7 Re Cracks & Chipping Discovered on Bus Bar Insulators Mounted on Power Conversion Products,Inc. Initially Reported on 870708.Damaged Insulators Replaced. Ref Drawings Revised | |
| ML20216E472 | 28 May 1987 | Part 21 Rept 140 Re Potential Defect in Air Pressure Regulators Mfg by Bellofram.Dripwell Gasket May Fail Due to Mismachining of Gasket Seating Surface Causing Loss of Control Air & Starting Air Pressure | |
| ML20215L535 | 29 April 1987 | Part 21 Rept Re Discrepancy Between as-tested NPSH Curve & NPSH Curve Provided by B&W,Canada for Spare Decay Heat Pump. Anomalies Detected in Test Curve Caused by Excessive Clearances.Region V Notified of Discrepancy on 870424 | |
| 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 | |
| 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 | |
| ML20207R703 | 11 March 1987 | Part 21 Rept Re Potential Defect in Static Exciter Voltage Regulator (Sevr) Reset Design.Recommends Mod to Control Circuits to Energize Sevr Upon Receipt of Emergency Start Signal.Mods Will Be Completed by 870331 | |
| 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 | |
| ML20211M923 | 10 February 1987 | Part 21 & Deficiency Rept Re Warped Geared Limit Switch Rotors Supplied by Limitorque Corp.Initially Reported on 870205.Internal Occurrence Description Rept Initiated. Limitorque Corp Will Provide Itemization of Affected Plants | |
| ML20215G759 | 1 October 1986 | Part 21 Rept Re Deficiencies in Tdi Time Delay Relays. Initially Reported on 860926.Relays Repaired by Startup Test Group.Work Request Generated to Inspect Remaining Relays | |
| ML20214M318 | 4 September 1986 | Potential Part 21 Rept Re Contromatics Actuator W/Jackscrew/ Handwheel Emergency Override Operator.Jackscrew/Handwheel Should Be Used for Emergency Manual Operation Only.Encl Ltr Also Sent to Listed Utils/Ae Firms | |
| ML20214P816 | 3 September 1986 | Part 21 & Deficiency Rept Re Incorrectly Wired GE Type 12NGA15AG3 Relays to Tdi Diesel Generators.Initially Reported in Apr 1986.Other Applications of Similar Relays Reviewed.Corrective Actions Completed on 860611 | |
| 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 | |
| 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 | |
| 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 | |
| ML20211N595 | 10 June 1986 | Part 21 Rept Re Cracked Limit Switch Rotors for Motor Operated Valves Supplied by Limitorque.Initially Reported on 860610.White (Melamine) Rotors Found Cracked Will Be Replaced W/Brown (Fibrite) Replacements | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| ML20054J911 | 23 June 1982 | Part 21 Rept Re Potential Defect in Couplings Drive Element of Dsrv or Dsr Standby Diesel Generator.Affected Licensees Will Be Notified No Later than 820715 | |
| ML20054M463 | 10 May 1982 | Part 21 Rept Re Defective Cable Code K2S,initially Reported 820506.Cable Reel Quarantined.Brand Rex Co Investigating |