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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 |
| 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 |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| ML20092D862 | 23 September 1982 | Part 21 Rept Re Upgrading of Stock Matl Outside Scope of NCA-3867.4(e) Due to Misunderstanding of Code Case N242.1. Initially Reported on 820922.Concerned Vendors & Licensees Notified.Use of Code Case N-310 Suggested | |
| ML19317F756 | 15 March 1978 | Part 21 Re Instrumentation/Reactor Protection Sys Experiencing Loss of Electrical Ground to Instrument Common Bus W/O Loss Being Detected.Corrective Action to Probably Include Periodic Testing to Prove Ground | |
| ML19329B724 | 15 March 1978 | Interim Deficiency Rept Re Auxiliary Shutdown Cabinet Unanchored by Required External Gussets.Gussets to Be Installed Prior to Startup | |
| ML19329B889 | 24 February 1978 | Deficiency Rept Re Control Rod Drive Sys Trip Circuit Breaker Cabinets:During Insp,Cabinet Welds Found Shorter than on Shaker Table Test Qualified Cabinet.Addl Weld Length to Be Added | |
| ML19329B891 | 16 November 1977 | Deficiency Rept Re Closed Governing Valve on Auxiliary Feed Pump Turbine.Caused by Excessive Vibration of Adjacent Startup Feed Pump.Turbine Supplier Investigating.Corrective Action to Be Completed in Two Wks | |
| ML20090F401 | 11 October 1977 | Part 21 Rept Re Defective Auxiliary Feed Pump Governor. Initially Reported on 770930.Governor Modified at Woodward Governor Co Facilities | |
| ML19329B772 | 5 October 1977 | Deficiency Rept Re Potential of Auxiliary Feed Pump Governor to Bind.Caused by Misalignment Forces Applied to Governor T-bar.Procedure Mod Underway to Shut Turbine W/Governor Servometer in Low Speed Stop Position | |
| ML19317F599 | 27 April 1977 | Final Deficiency Rept Re Lock Nut Staking on Type Smb Limitorque Operated Valves.Insp Program Implemented & Operators Staked | |
| ML19317F582 | 4 April 1977 | Final Deficiency Rept Re Westinghouse Motor Control Ctr 400 Amp Stabs.Westinghouse 770225 Ltr Identified Potential Deficiency in 400 Amp Stabs & Provided Design Mods.Mod Completed | |
| ML19317F574 | 23 March 1977 | Final Deficiency Rept Re Safety Features Actuation Sys Diesel Overload.Manual Trip Buttons Replaced by seal-in Mechanical Trip Buttons to Provide Manual Trip Signal & Allow Sequencer to Properly Load Diesel | |
| ML19329A867 | 9 March 1977 | Final Deficiency Rept Re Lack of Chambers on Lower Guide Lugs & Use of Hand Grinders During Repair of Upper Keyways Contrary to Specified Procedure.Discovered During Initial Out of Level Life of Core Support Assembly | |
| ML19319B916 | 22 February 1977 | Final Deficiency Rept Re Human Error in Calculating Calibr Correction Factor for Model 848-18 Victoreen Field Calibr Kit.Corrective Action:Random Samples Now Compared W/Data Taken by Calibr Technician | Earthquake |
| ML19317F611 | 22 February 1977 | Final Deficiency Rept Re Victoreen Calibrator Use in Calibr of Radiation Monitor.Intercomparison of Facility & Vendor Calibrators Caused Error.Calibr Procedure Instituted Correlating Sample & Technician Data Prior to Calibr | |
| ML19329B282 | 21 January 1977 | Deficiency Rept Re Diesel Generator Sequencer Design.During Review of Safety Features Actuation Sys,Safety Actuation Signal to Emergency Diesel Generator Found Blocked.Loss of Offsite Power Signal to Be Added to Reset Logic | |
| ML19319B359 | 20 January 1977 | Final Deficiency Rept Re Hpis Pump,High Bearing Temp. Pump Thrust Bearing Temp Exceeded 170 F max.Closed-loop, Water Cooled Sys Designed & Installed.Preoperational Testing Performed on Forced Lubrication Oil Sys | |
| ML19329B286 | 1 November 1976 | Deficiency Rept Re Instrument Mounting Bracket.B&W Brackets Found Seismically Unqualified.Bechtel Analyzed Design & Found It Adequate to Withstand Max Earthquake Per FSAR | Earthquake |
| ML19329B096 | 27 October 1976 | Final Deficiency Rept Re Use of Seismically Unqualified GE Type Hfa Relay.Relays Retested & Found Qualified | |
| ML19329B097 | 27 October 1976 | Final Deficiency Rept Re Broken Valve Actuator Yoke on Isolation Valve MU-HV66B.Cast Iron Yokes Replaced W/Steel |