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| Issue date | Title | Topic | |
|---|---|---|---|
| ML20217A169 | 22 September 1999 | Part 21 Rept Re Engine Sys,Inc Controllers,Manufactured Between Dec 1997 & May 1999,that May Have Questionable Soldering Workmanship.Caused by Inadequate Personnel Training.Sent Rept to All Nuclear Customers | |
| ML20207M923 | 12 March 1999 | Amended Part 21 Rept Re Cooper-Bessemer Ksv EDG Power Piston Failure.Total of 198 or More Pistons Have Been Measured at Seven Different Sites.All Potentially Defective Pistons Have Been Removed from Svc Based on Encl Results | |
| 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 |
| NSD-NRC-97-5093, Part 21 Rept Re W Identified Defects That Could Create Substantial Safety Hazard Should Defect Remain Uncorrected. Plans to Complete Proper Refurbishment of All of Returned Breakers Being Established | 14 May 1997 | Part 21 Rept Re W Identified Defects That Could Create Substantial Safety Hazard Should Defect Remain Uncorrected. Plans to Complete Proper Refurbishment of All of Returned Breakers Being Established | |
| 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 |
| ML20135E381 | 3 March 1997 | Part 21 Rept Re Output Drift W/Increasing Temperature on Several RTD Amplifiers Noted During Installation of RTD by-pass Mod at Station.Action to Identify All Circuit Cards W/Affected Date Codes,Identified | |
| ML20117G464 | 14 May 1996 | Part 21 Rept Re Cooper Bessemer Reciprocating Products,Div of Cooper Cameron Corp,Issued Ltr to Define Utils/Plants Containing Similar Equipment as Supplied on Cooper Bessemer Ksv & Enterprise Dsr EDGs | |
| ML20097J635 | 30 January 1996 | Part 21 Rept Re Intermittent Failure of DG Relay Mfg by Amerace Electronic Components.Suspect Relays at Plants Identified & Replaced.Amerace Indicated That Operators & QC Personnel Made Aware of Need for Proper Soldering | |
| ML20096E651 | 18 January 1996 | Part 21 Rept Re Failure of MOV Motor Pinion Gear Mfg by Limitorque at Byron Station.Replacement & Insp Activities Initiated for Potentially Impacted Populations of MOVs at Byron & Braidwood Stations | Time of Discovery |
| ML20094R739 | 28 November 1995 | Potential Part 21 Rept Re Ksv EDG Sys Mfg by Cooper-Bessemer Reciprocating Products Div,Div of Cooper Cameron Corp. Recommends That All Utils Verify Open Oil Passage in Assembly | |
| ML20082Q949 | 21 April 1995 | Part 21 Rept Re Notifying Commission of Potential Design Defect of Ksv EDG Sys | |
| ML20077D343 | 29 November 1994 | Part 21 Rept Re Suspect Master Connecting Rods & Contains Info Location in Engine for Rods | |
| ML20078G305 | 9 November 1994 | Rev to Part 21 Rept Re Potential Problem W/Master Power Connecting Rods.Vendor Recommends Listed Utils Perform Visual Insp of Master Rods to Determine Applicability of Rept | |
| ML20071J189 | 22 July 1994 | Final Part 21 Rept Re Cracks Found in Body to Bonnet Nuts on Copes-Vulcan Airoperated Valves.Operability Evaluation for Byron Units 1 & 2,of Affected Valves W/Nuts of Heat Numbers H & I Completed on 940622 | Time of Discovery |
| ML20073S954 | 27 June 1994 | Part 21 Rept Re Incorrect Matl Supply Discovered on Unshipped Order.Pump Div Will Notify Enertech W/ Recommendation That Items Supplied W/Incorrect Matl Be Removed & Destroyed | |
| ML20070A144 | 22 June 1994 | Part 21 Rept Re Conditions Which Affect Hydraulic Valve Operators Supplied by Bw/Ip to Enertech Co & Listed Utils. Vendor Will Notify Enertech W/Recommendations That All Items Supplied W/Incorrect Matl Be Removed & Destroyed | |
| ML20059L986 | 11 November 1993 | Part 21 Rept Re Deviation Wherein Fully Open Butterfly Valve Located 15 Pipe Diameters Upstream of Sensors Was Disturbing Flow Profile Enough to Cause Ultrasonic Meter to Indicate 3 to 4% Low.Customers Notified & Valve Removed | |
| ML20127M520 | 24 November 1992 | Final Part 21 Rept Re Reject Lot Serial Numbers of Defective Fuel Nozzle Tips,Consisting of Corrected Page 6 of 921102 Rept Re Reject Lots for Fuel Injector Assembly | |
| ML17223A745 | 26 January 1990 | Part 21 Rept Re Backup Rings Furnished in Spare Parts Seal Kits & in 25 Gpm 4 Way Valves as Part of Actuators Made of Incorrect Matl.Rings Should Be Viton & Have Been Identified as Buna N | |
| ML20207P015 | 4 October 1988 | Part 21 Rept Re Fuel Nozzle Tips in Standby Diesel Generator KSV-20-T W/Cracks Permitting Diesel Fuel to Be Sprayed Into Cylinders.Heavy Vapors Observed Emitting from Breathers on Some Cylinder Heads | |
| ML20149H821 | 11 February 1988 | Final Deficiency Rept 457/87-01 Re Diesel Engine Generator Rocker Arm Failure.Initially Reported on 870217.Util Took Steps to Determine Strength of Rocker Arms.Low Strength Rocker Arms Replaced W/New Rocker Arms | |
| ML20214H822 | 15 May 1987 | Interim Deficiency Rept Re Diesel Engine Generator Rocker Arm Failure.Initially Reported on 870217.Test/replacement Program Started,Contingent on Receipt of Replacement Exhaust Rocker Arms from Cooper-Bessemer | |
| ML20206Q882 | 2 April 1987 | Interim Deficiency Rept Re Diesel Engine Generator Rocker Arm Failure.Initially Reported on 870217.Investigation Emcompasses Both Metallurgical Analysis & Mechanical Interactions.Next Rept Will Be Submitted by 870501 | |
| ML20205B669 | 17 March 1987 | Deficiency Rept Re Diesel Engine Generator Rocker Arm Failure.Initially Reported on 870217.Diesel Generator Repaired by Honing Out Crosshead to Crosshead Guide Clearance to 0.006 Inches.Next Rept Submitted by 870430 | |
| 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 | |
| ML20212H545 | 12 January 1987 | Part 21 Rept Re Break of Master Power Rod at Fractured Surface.Caused by Fatigue Failure Originating in Rod When Iron Plating in Articulated Rod Pin Bore Failed,Resulting in Engine Inoperability.Rod Replaced | |
| ML20207P180 | 29 December 1986 | Final Deficiency Rept 86-02 Re Rejectable Indications During Preservice Insp on Loop 1 Steam Generator.Actions Necessary to Resolve Items Completed,Per Suppls 1 & 2 to NUREG-1002 | |
| ML20212D972 | 23 December 1986 | Interim Deficiency Rept 84-14 Re Weld & Grindout Identified During Preservice Insp.Initially Reported on 841121.New Data Demonstrates That Indication Size Meets ASME Section XI 1WB-3512,1977 Edition.Indication Grindout No Longer Needed | |
| ML20215F953 | 19 December 1986 | Part 21 Rept Re Design Error Uncovered in Certain Safety Shutdown Circuits for Standby Diesel Generator.Switches 12E0-1,12E0-2,33E0-1 & 33E0-2 Not Intended to Initiate Emergency Mode Trip as Drawings Indicate | |
| ML20214T511 | 26 November 1986 | Deficiency Rept Re Misplaced Radiographs for Westinghouse Equipment.Initially Reported on 861030.Item Not Reportable Per 10CFR50.55(e) | |
| ML20215H223 | 17 October 1986 | Revised Final Deficiency Rept 84-07 Re Crush Strength of Energy Absorbing Matl Used in Pipe Whip Restraints.Removal of Four Addl Restraints in Unit 1 Took Place on 851004 During Unit 1 Outage | |
| ML20210N656 | 26 September 1986 | Final Deficiency Rept 85-06 Re Failure of Diesel Generators 1A & 1B to Sustain Adequate Prime During Testing.Initially Reported on 850822.Fuel Oil Sys Modified & Tested | |
| ML20214W564 | 19 September 1986 | Deficiency Rept Re 860818 Inadvertent Discharge of Water Into Spent Fuel Pit Where 64 New Fuel Assemblies for Initial Core Load Being Stored.Initially Reported on 860819.Event Not Reportable Per 10CFR50.55(e) | |
| ML20210F478 | 17 September 1986 | Final Part 21 & Deficiency Rept 86-06 Re Fastener Matl Supplied by Cardinal Industrial Products.Initially Reported on 860617.Fastener Matl Met ASME Code Requirements. Documentation of Corrective Actions Available Onsite | |
| ML20203N193 | 16 September 1986 | Final Deficiency Repts 84-05 & 84-15 Re Inconsistencies in Documentation of Gk Newberg Structural Steel Installations & Welding Program,Respectively.Initially Reported on 840417. Installation Travelers Reviewed.Deficiencies Resolved | |
| 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 | |
| ML20214P512 | 2 September 1986 | Final Deficiency Rept 83-08 Re Fabrication of Pullman Sheet Metal Duct Fittings W/O Approved Design Documentation. Initially Reported on 830630.Unit 1 Fitting Mods Completed on 860501.Reworking of 12 Fittings Remain for Unit 2 | |
| ML20205F721 | 12 August 1986 | Revised Final Deficiency Rept 84-12 Re Removal of Name Plates from ASME Large Bore Spool Pieces.Initially Reported on 840824.Replacement Identification Plate Not Attached to Installed Spool Pieces.Procedure Revised to Reflect Change | |
| ML20212K274 | 12 August 1986 | Final Deficiency Repts 84-05 & 84-11 Re Boeing Steam Generator Snubber Failure.Initially Reported on 840628. Snubber Functional Test Results Reviewed & Acceptable. Snubbers Refurbished for Listed Units | |
| ML20212B379 | 29 July 1986 | Interim Deficiency Rept 86-06 Re Fastener Matl Supplied by Cardinal Industrial Products.Initially Reported on 860617. Matls Over 1 Inch in Diameter Shipped During 840109-850815 & Not Included in Notification Ltrs Acceptable | |
| ML20206B137 | 11 June 1986 | Final Deficiency Rept 84-04 Re out-of-tolerance Radiographic Film Densities.Initially Reported on 840406. Unit 1 Production Welds Repaired &/Or Reradiographed & Welder Qualifications Evaluated & Confirmed | |
| ML20211F197 | 5 June 1986 | Final Deficiency Repts 86-03 by & 86-05 Bw Re Cold Leg Safety Injection Pipe Vibration & Cracks.Initially Reported on 860430.D Loops Changed to 5-D Bends & Support Added for Addl Stiffness | |
| ML20211E347 | 4 June 1986 | Final Deficiency Repts 84-06(BY) & 84-14(BW) Re Large Laminar Indication in Steam Generator Snubber Piston Rod End Blade.Initially Reported on 840731.Rod End & Six End Caps Replaced | |
| ML20198E898 | 20 May 1986 | Final Deficiency Repts 86-01 & 86-03 Re Defective Spot Welds on Cable Tray Hanger Strut Matl.Initially Reported on 860306.Engineering Evaluation Performed for Hangers Remaining W/Suspect Control Numbers | |
| ML20197E826 | 9 May 1986 | Final Deficiency Rept 86-04 Re 21 Rejectable Weld Indications Identified During Preservice Insp.Initially Reported on 860409.Relief from Repair Requirements Will Be Requested for 12 Unacceptable Indications | Non-Destructive Examination Hydrostatic |
| ML20210L044 | 22 April 1986 | Final Deficiency Repts 86-02 for Byron & 86-04 for Braidwood Re Failures of Diesel engine-generator Rocker Arm.Initially Reported on 860327 by Util & 860311 by Cooper Industries Under Part 21 | |
| ML20210E080 | 18 March 1986 | Final Deficiency Rept 84-17 Re Concrete Expansion Anchor Installations.Sargent & Lundy Evaluation Complete.No Significant Design Discrepancies Noted.Util Nonconformance Repts 658 & 659 Closed | |
| ML20141N860 | 12 March 1986 | Interim Deficiency Rept 86-01 Re Discrepant Spot Welds on Cable Tray Hangers Made of P1004A Unistrut Matl.Initially Reported on 860210.Walkdown of Hangers Completed & All Discrepant Welds Recorded | |
| ML20141N790 | 11 March 1986 | Part 21 Rept Re Inlet Rocker Arm Failure in Cooper Bessemer Corp Engines S/N 7177 & 7178.Broken Rocker Arms Constitute Secondary Failure.Primary Failure Was Seizure of Valve Train Crossheads in Up Position | |
| ML20137Z500 | 6 March 1986 | Interim Deficiency Rept 86-03 Re Defective Spot Welds on Cable Tray Hanger Strut Matl.Initially Reported on 860121. Unit 2 Containment Hangers Will Be Replaced & Unit 1 Hangers Will Be Repaired or Replaced |