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| Issue date | Title | Topic | |
|---|---|---|---|
| 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 | |
| ML20207E931 | 26 February 1999 | Part 21 Rept Re Sprague Model TE1302 Aluminum Electrolytic Capacitors with Date Code of 9322H.Caused by Aluminum Electrolytic Capacitors.Affected Capacitors Replaced | |
| ML20199M089 | 22 January 1999 | Part 21 Rept Re Failure of Square Root Converters.Caused by Failed Aluminum Electrolytic Capacitory Spargue Electric Co (Model Number TE1302 with Mfg Date Code 9322H).Sent Square Root Converters Back to Mfg,Barker Microfarads,Inc | |
| ML20248F353 | 21 May 1998 | Part 21 Rept Re Electronic Equipment Repaired or Reworked by Integrated Resources,Inc from Approx 930101-980501.Caused by 1 Capacitor in Each Unit Being Installed W/Reverse Polarity. Policy of Second Checking All Capacitors Is Being Adopted | Reverse polarity |
| 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 |
| 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 |
| 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 | |
| ML20083R910 | 26 April 1995 | Final Part 21 Rept Re Kepco,Inc Model RMX24-D-20804 Power Supplies in Which Transistors Q15 &/Or Q16 Failed to Open & R1 Was Open.Replacement of Transmitters w/XSIS-095 Along W/ Replacement of Electrolytic Capacitors Provides Solution | |
| 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 | |
| ML20058G598 | 17 November 1993 | Part 21 Rept Re Westronics Recorders,Model 2100C.Signal Input Transition Printed Circuit Board Assembly Redesigned to Improve Recorder Immunity to Electromagnetic Interference.List of Affected Recorders & Locations Encl | |
| ML20057G151 | 7 October 1993 | Part 21 Rept Re Westronics Model 2100C Series Recorders. Informs That Over Several Tests,Observed That Recorder Would Reset During Peak Acceleration & Door Being Forced Off Recorder.Small Retaining Clips Added to Bottom of Door | |
| 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 | |
| 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 | |
| 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 | |
| ML20206H721 | 21 November 1988 | Part 21 Rept Re Defect in Design of Component Mfg by Cooper Energy Svcs.Initially Reported on 881115.Util Became Aware of Problem on 881103.Div I Emergency Diesel Generator Declared Inoperable & Valve Reclassified | |
| 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 | |
| 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 | |
| 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 | |
| ML20210F867 | 2 February 1987 | Part 21 Rept Re Use of Improperly Designed S&W Electrical Manhole Duct Seals.Initially Reported on 870123.Manhole Covers Redesigned by S&W to Prevent Flooding of Manhole. Covers Installed Prior to Initial Criticality | Safe Shutdown |
| ML20209H198 | 31 January 1987 | Amended Final Deficiency Rept Re Inadequate Flow Rate for Hydrogen Recombiners Supplied by Rockwell.Blower Impeller Orientation for Both Trains Corrected & Tested. Cause of Improper Installation Will Be Submitted by 870213 | |
| ML20212Q886 | 26 January 1987 | Part 21 Rept Re Improper Seating of GE-supplied Agastat GP Series Relays.Defect Attributed to Inadequate Original Installation,Workers Coming in Contact W/Installed Relays or Both.Corrective Actions Listed | Safe Shutdown |
| ML20207J264 | 21 November 1986 | Interim Deficiency Rept (55(e)-86-22) Re Insufficient Flow Rate for Hydrogen Recombiners.Initially Reported on 861015. Extensive Trouble Shooting During Preoperational Testing Program Underway.Final Rept Will Be Submitted by 861205 | |
| ML20215M737 | 23 October 1986 | Final Deficiency Rept (55(e)-86-21) Re Inadvertent Closure of Automatic Fire Suppression Control Valve.Initially Reported on 860918.Drawing Fsk 23-6c Revised to Change Isolation Valve 2DFR-V128 to Open Position | Safe Shutdown |
| ML20197B361 | 21 October 1986 | Final Deficiency Rept (55(e)-86-18) Re Cracked Latching Roller Found on One MSIV & Problems W/Closure Time of Msivs. Initially Reported on 860806 & 15,respectively.MSIVs Capable of Performing Required Design Functions | Finite Element Analysis |
| ML20197B036 | 20 October 1986 | Final Deficiency Rept (55(e)-86-20) Re MSIV Leakage Rates. Initially Reported on 860909.Actions Being Taken to Restore Valves to Acceptable Condition & Reduce Wearing Stress to Acceptable Level | Hydrostatic Liquid penetrant |
| NMP2L0896, Interim Deficiency Rept 50.55(e)-86-20 Re Excessive Leakage of Msiv.Initially Reported on 860909.Meeting Scheduled for 861015 in Bethesda,Md to Discuss Rept | 8 October 1986 | Interim Deficiency Rept 50.55(e)-86-20 Re Excessive Leakage of Msiv.Initially Reported on 860909.Meeting Scheduled for 861015 in Bethesda,Md to Discuss Rept | Hydrostatic |
| ML20214T392 | 12 September 1986 | Interim Deficiency Rept (55(e)86-00-19) Re Failure of MSIV 2MSS*HYV7B to Unlatch & Close within 3-5 as Required by Design.Initially Reported on 860815.Matter Under Investigation.Final Rept Will Be Submitted by 861020 | |
| ML20214T317 | 11 September 1986 | Interim Deficiency Rept 86-00-18 Re Cracked Latch Roller Bearing on MSIV 2MSS*HYV7A.Initially Reported on 860808. Problem Under Investigation.Final Rept Will Be Submitted by 861020 | |
| 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 | |
| ML20203M031 | 20 August 1986 | Final Deficiency Rept (55(e)86-17) Re Cracks in Contact Levers for MSIV Limit Switches (Namco EA180).Initially Reported on 860717.Visual Insp of Contact Levers Performed & Cracked Parts Replaced | |
| ML20215M527 | 8 August 1986 | Final Deficiency Rept Re Problem W/Response Time of Moderate Energy Line Cracking Temp Sensing Devices.Initially Reported on 860708.W/o Encl | |
| ML20211F707 | 3 August 1986 | Final Deficiency Rept (55(e)-86-14) Re Control Cable Length Verification.Initially Reported on 860703.Design Changes Issued to Correct Circuits Where Unacceptable Conditions Occurred to Reduce Circuit Resistance of Cables | |
| ML20203D213 | 14 July 1986 | Part 21 Rept Re Cracks in Plastic Contact Lever Assembly EA188-30007 Found in 14 EA180 Limit Switches During S&W Insp.Replacement of Contact Lever Arms in All Category I safety-related Limit Switches Proposed.Tests Initiated | |
| ML20209G078 | 14 July 1986 | Part 21 Rept Re Possible Defect in Namco Contact Lever Assembly Part EA188-30007 for Series EA180 Limit Switches. Program Will Be Initiated to Determine If Cracks Caused Switch Failure | |
| ML20207G953 | 14 July 1986 | Corrected Part 21 Rept Re Cracks in Plastic Contact Lever Assembly EA188-30007 in Series EA180 Limit Switches. Replacement of Contact Lever Arms in All Category I safety-related Limit Switches Proposed.Tests Initiated | |
| ML20215M539 | 10 July 1986 | Final Deficiency Rept (55(e)-86-11) Re Category I Components in non-Category I Stair Tower.Initially Reported on 860610. Stair Tower Will Be Braced to Resist Seismic Forces Prior to Fuel Load | |
| ML20215M732 | 3 July 1986 | Final Deficiency Rept (55(e)-86-12) Re Problem W/Air Start Valve Seat Inserts for Div I & II Emergency Diesel Generators.Initially Reported on 860619.Inserts Replaced.Air Start Distributors for Diesels Readjusted | |
| ML20204J058 | 1 July 1986 | Final Deficiency Rept (55(e)-86-07) Re Excessive Vibrations in Low Pressure Fuel Oil Supply Lines of Div I & II Standby Diesel Generators.Initially Reported on 860508.Damaged Fuel Lines Replaced | |
| 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 | |
| ML20212D265 | 27 June 1986 | Forwards Final Deficiency Rept Re Cracks in Delivery Valve Holders for Div I & II Emergency Diesel Generators.Initially Reported on 860528.W/o Encl | |
| ML20211K557 | 20 June 1986 | Part 21 Rept Re Inadequate Thread Engagement on Motor Hold Down Bolts for Plant Svc Water Sys Pump/Motor,Per NRC .No Further Action Necessary.Customer Initiated Change in Bolt Length | |
| ML20215M542 | 16 June 1986 | Final Deficiency Rept (55(e)-86-09) Re Borg Warner electro- Hydraulic Actuator Oil Leak on Dc Motor.Initially Reported on 860516.Valves Returned to Mfg & Rebuilt to Include New Seals & Qualified Pao Hydraulic Fluid | |
| ML20215M535 | 10 June 1986 | Final Deficiency Rept (55(e)-86-08) Re Failure of Elgar Class 1E Inverters Fuse Block Connection.Initially Reported on 860508.Vendor-recommended Mods Which Provide Proper Block to Bar Connection Will Be Completed by 860701 | |
| ML20215M721 | 9 June 1986 | Interim Deficiency Rept (55(e)-86-07) Re Damaged Fuel Lines in Divs I & II Diesel Generators.Initially Reported on 860508.Investigation Continuing.Final Rept Will Be Submitted by 860701 | |
| ML20211H359 | 5 June 1986 | Final Deficiency Rept (55(e)-86-06) Re Rosemount Loose Environ Seal Installations.Initially Reported on 860506. Loose Fittings & All Units w/90-degree Fittings Will Be Modified Prior to Fuel Load | |
| ML20211H404 | 2 June 1986 | Final Deficiency Rept (55(e)-86-05) Re Incorrect Category I Cable.Initially Reported on 860501.S&W Replaced Unqualified vendor-supplied Cables w/NJP-14 Type Cable for Flow Switches 2HVRKFE/FS 18A & 18C | |
| ML20198E458 | 6 May 1986 | Deficiency Repts (55(e)-85-00-22) Re Reliance Motors on Limitorque Operators & (55(e)-84-00-48) Re Separation of Cable in Free Air.First Item Not Reportable.Extended Cable Tray Covers Will Be Installed Before Fuel Load |