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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| ML20115J398 | 22 July 1996 | Interim Part 21 Rept Re 3/4 Schedule 80 Pipe Furnished to Consolidated Power Supply.Investigation Revealed Only One Nuclear Customer Involved in Sale of Matl | |
| ML20072T017 | 30 August 1994 | Final Part 21 Rept Re Gimpel Trip & Throttle valve.Dresser- Rand Changed Nuclear Part Insp Records for Both Coupling & Stem to Require That Parts Be Tagged W/Proper Assembly Instructions | |
| ML20072A787 | 5 August 1994 | Initial Part 21 Rept 038 Re Failure of Gimpel Trip Throttle Valve to Open During Testing of AFW Pump Turbine at Toledo Edison.Subj Valve Stems Should Be Tagged W/Instructions Defining Proper Procedures for Securing Stem to Coupling | |
| 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 | |
| ML20044G531 | 26 May 1993 | Suppl to 921207 Part 21 Rept Re Declutch Sys Anomaly in Certain Types of Valve Actuators Supplied by Limitorque Corp.Limitorque Designed New Declutch Lever Which Will Be Available in First Quarter 1993 | Stroke time |
| ML20126J596 | 31 December 1992 | Part 21 Rept Re Potential Loss of RHR Cooling During Nozzle Dam Removal.Nozzle Dams May Create Trapped Air Column Behind Cold Leg Nozzle Dam.Mod to Nozzle Dams Currently Underway. Ltrs to Affected Utils Encl | Hydrostatic |
| 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 | |
| ML20096F592 | 11 May 1992 | Followup to 920417 Part 21 Rept 10CFR21-0062 Re Failed Shaft in DG W/Emd 645 Series Engines Using Turbochargers Remanufactured from May 1991 to Jan 1992.Turbochargers Should Be Removed & Returned to EMD for Insp/Repair | |
| ML20043A609 | 27 April 1990 | Part 21 Rept Re Defective Axial Cracks in Pump Shaft in Region Immediately Above Impeller & in Reactor Recirculation Pumps.Probably Caused by Crack Growth as Thermal Fatigue. Technical Advisory Bulletin Will Be Sent to Each Util | |
| 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 | |
| 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 | |
| ML20246K740 | 26 April 1989 | Part 21 Rept Re Incorrectly Stamped Name Plates on Certain Asco Nuclear Qualified Valves.Vendor Will Contact Each Affected Facility & Furnish Correctly Stamped Plates & in Near Future Discontinue Sale of Rebuild Kits for Valves | |
| ML20235U029 | 27 February 1989 | Part 21 Rept Re Velan Maint Manual VEL-FBBM 2 1/2-24 Inch Forged Bolted Bonnet Gate & Globe Valves & Bolted Cover Check Valves.Investigation Revealed That Dry Film Lubricant Not Appropriate.Lubrication Manual Revised | |
| 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 | |
| ML20245D954 | 6 September 1988 | Part 21 Rept Re Condition Involving Inconel 600 Matl Used to Fabricate Steam Generator Tube Plugs & Found to Possess Microstructure Susceptible to Stress Corrosion Cracking | |
| 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 | |
| ML20210C977 | 27 April 1987 | Part 21 Rept Re Use of Incorrect Equation for Predicting Thrust Required to Close Valves AF-599 & AF-608.Initially Reported on 861031.Evaluation Concludes That Std Vendor Formula for Calculation of Thrust Conservative | |
| ML20209F293 | 27 April 1987 | Part 21 & Deficiency Rept Re Gas Bubble Formation Between Diaphragm Layers within Sensing Element of Sor Series Switches.Cause Not Yet Isolated.Formation of Bubble May Cause Setpoint to Shift Outside Tech Specs | |
| 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 | |
| ML20210F476 | 3 February 1987 | Part 21 Rept Re Problem in Torque Switches Supplied W/ Limitorque Operators Installed at Facility.Initially Reported on 870129.Limitorque Did Not Supply Adequate Instructions to Maintain Torque Switches Balance | |
| ML20212E626 | 22 December 1986 | Possible Part 21 Rept Re 36-inch Rockwell Intl Globe Valves Used as Msivs.Initially Reported on 861218.Mfg May Not Have Accounted for Changes in Valve Operating Characteristics W/ Temp & Pressure.Determination of Reportability Underway | Stroke time |
| ML20213F860 | 5 November 1986 | Final Part 21 Rept Re Velan Main Steam to Auxiliary Feedwater Pump Isolation Valve MS-107A Received W/O Stellite on Valve Disc Guide Faces.Initially Reported on 861031.Item Not Reportable Per 10CFR21 | |
| 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 |
| ML20199G439 | 16 June 1986 | Final Part 21 Rept Re Hydraulic Fluid Leakage in Itt General Controls Hydramotor Actuators.Initially Reported on 860418. Caused by Lack of Adequate Testing & Preventive Maint. Condition Not Reportable Under Part 21 | |
| ML20205T645 | 10 June 1986 | Part 21 Rept Re Defect in GE Type Sbm Control Switch Intended for Use in Alternate Shutdown Sys.Defective Switch Rejected & Returned to Vendor.Remaining Switches Examined. Corrective Action Rept M-36 Issued to United Controls,Inc | |
| 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 | |
| ML20203Q120 | 30 April 1986 | Part 21 Rept Re Itt General Controls Hydramotor Actuators Leaking Hydraulic Fluid.Initially Reported on 860418.Cause of Leakage Currently Being Evaluated.Evaluation Expected to Be Completed by 860602 | |
| ML20141D805 | 1 April 1986 | Part 21 Rept Re Model 402 Series Level Control Used for safety-related Application Shipped W/O Torque Check. Customers Will Be Notified by 860428 & Requested to Perform Torque Check.List of Plants Using Component Encl | Earthquake |
| ML20140D669 | 28 January 1986 | Part 21 & Deficiency Rept Re Blocked Venturi Holes in Air Start Motor Lubricator Assembly of EMD 20-645E4 Emergency Diesel Generators.Initially Reported on 860127.Further Info Will Be Forwarded When Available | |
| ML20151R685 | 28 January 1986 | Potential Part 21 & Deficiency Rept Re Field Wire Wrap Practice of Consolidated Controls Corp.Initially Reported on 860124.Procedure Written for Installation & Removal of Wire Wrap Connections.Addl Info to Be Sent as 30-day LER | |
| 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 | |
| ML20134Q174 | 29 August 1985 | Part 21 Rept Re Potential Maint Issues Associated w/Anker-Holth Snubbers.Owners of Anker-Holth Snubbers Will Be Informed of Problems & Sent Revs to Technical Instruction Manuals to Include Procedures for Seal & Fluid Maint | |
| 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 | |
| ML20133K893 | 29 July 1985 | Deficiency & Part 21 Rept Re Error in Torrey Pines Bypass Limit Switch Setting Procedure Contributing to Limitorque Valve Operator Torquing Out.Bypass Limit Switch Setting Procedure Modified.Addl Info Will Be Provided in 30-day LER | |
| ML20132E594 | 29 July 1985 | Part 21 & Deficiency Rept Re Torrey Pines Technology Limitorque motor-operated Valve Bypass Limit Switch Setting Procedure.Initially Reported in 850725 Telcon.Procedure Will Be Modified | |
| ML20116N614 | 3 May 1985 | Part 21 & Deficiency Rept SSH-M-85/01 Re Defective Circuit Breakers for Recombiners Supplied by Rockwell Intl.Initially Reported on 841124.Equipment Deficiencies Corrected Prior to Installation.Rockwell Intl Requested to Follow Up Action | |
| ML20113A429 | 11 January 1985 | Part 21 Rept Re Incorrect Insulating Tape.Instructions Governing Handling of Incoming Matls Fully Adequate & If Followed,Would Have Prevented Error | |
| ML20108B638 | 1 November 1984 | Part 21 Rept Re Defect in Velan Swing Check Valves Causing Valve Disc to Improperly Align W/Valve Seat.All Four High Pressure Injection Swing Check Valves Will Be Disassembled During Refueling Outage & Valve Internals Modified | |
| ML20095G601 | 22 August 1984 | Part 21 Rept Re Defects in 18-inch SA-333 RHR Pipe.Samples of Defective Pipe Matl Being Shipped to Techninat Corp,Per Request.Defects Located in One Length of SA-333 Grade 6 Pipe | |
| ML20090H850 | 20 July 1984 | Supplemental Part 21 Rept Re Two Laminar Type Discontinuties Noted in Tioga Pipe Supply Co 18-inch Carbon Steel Pipes. Corrective Action Rept M-27 Issued to Bechtel on 840705 Requesting Identification of Cause | |
| ML20091N238 | 1 June 1984 | Part 21 Rept Re Four of Nine Westinghouse Supplied Replacement Items for Motor Control Ctrs Substantiated as Being Same or Equivalent to & Physically Interchangeable W/ Original Components | |
| ML20086U425 | 24 February 1984 | Followup Part 21 Rept Re Defective Mechanical Snubber Capstan Springs Supplied by Pacific Scientific.Affected Utils Listed.Purchasers Have Been Notified & Advised to Work Directly W/Pacific Scientific in Disposition | |
| ML20087H609 | 16 December 1983 | Part 21 Rept Re Nonconformance of Metal Hose Assemblies for Asme,Section Iii,Class 2 & 3 Svc.Status of Nonconforming Items Shipped Encl.All Customers Notified | |
| ML20077H705 | 4 August 1983 | Part 21 Rept Re 75 Components (Part P2073A) Lacking Conformance to Specs for Size & Fusion.Initially Reported on 830718.Conditions Which Allowed Erroneous Shipment Corrected | |
| ML20079R108 | 17 June 1983 | Part 21 Rept Re Adequacy of Fittings Supplied by Tube-Line Corp Through Capitol Pipe & Steel Products Co for Use on New Auxiliary Feedwater Headers of Steam Generators.Flanges Not heat-treated as Required by Matl Specs |