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Issue date | Title | Topic | |
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ML20064J869 | 23 January 1980 | Final Deficiency Rept Re Inadequate Fault Protection by Primary Protective Devices.Rework to Correct Inadequacy Completed.Curves Showing Revised Protective Device Characteristics Sent to NRC in Util | |
ML20081C511 | 9 March 1984 | Part 21 Rept Re Status Update Concerning Abnormal Wear on Linear Converters.Test Program Underway.Results of Investigation Indicate Excessive Wear Caused by Hunting of Control Circuitry | |
ML20086N042 | 2 January 1984 | Final Part 21 Rept Re Potential Problem Concerning Radiography of Branch Connection Welds Covered by Reinforcing Pads.Welds at Byron,Braidwood & North Anna Acceptable.Weld 7 at Clinton Reradiographed | |
ML20086N238 | 4 October 1983 | Supplemental Part 21 Rept Re Radiographic Record Evaluation, Supplying Addl Data to 830624 Submittal.Records Show That 90 Degree Branch Connections Furnished to North Anna 1 & 2 Jobsites.No Nozzles Supplied to Zimmer.Related Info Encl | |
ML20088A623 | 28 March 1984 | Part 21 Rept Re Abnormal Wear on Linear Converter Units Mfg & Furnished to Power Generating Facilities.Caused by Actuator Hunting.All Customers Provided Field Lubrication Procedure | |
ML20092D971 | 15 June 1984 | Part 21 Rept Re Thermal Nonrepeatability & Other Calibr Errors in Barton Lot 1 Transmitters.Initially Reported on 840615.Transmitter Defects Identified & Expected Error Deviations Calculated.Utils Notified | |
ML20094D906 | 19 July 1984 | Interim Deficiency Rept,Item 176 Re Kerite Co Single Conductor Power Cables Damaged,But Undetected by Insp & Testing.Initially Reported on 840619.Final Rept by 841215 | |
ML20101L966 | 1 July 1992 | Part 21 Rept Re Discovery of Klockner-Moeller 480-volt Breaker in Tripped Condition Due to Fracture of Plastic Arm within Breaker.Two of Three Failed Breakers Sent to Mfg for Analysis.Results Expected by End of Jul 1992 | |
ML20126B426 | 7 March 1980 | Final Deficiency Rept Re Overstressed Pipes,Pipe Supports & Equipment Nozzles Identified During Valve & Operator Weight Verification Program Required by IE Bulletin 79-14.Caused by Changes in Valve & Operator Weights.Oversize Charts Encl | |
ML20126B620 | 11 March 1980 | Interim Deficiency Rept:Svc Water Radiation Monitoring Pumps for Recirculation Spray Heat Exchangers Not Qualified for Integrated Dose Expected During Postulated Accident. Replacement Parts Under Consideration | |
ML20126B732 | 17 March 1980 | Final Deficiency Rept Re Seismic Amplified Response Spectrum Curves in Some Pipe Stress Analyses.All Mods Completed | |
ML20126C690 | 5 June 1985 | Part 21 Rept Re Generator Failure.Concurs W/Encl Louis Allis That Interpolar Connectors Be Removed | |
ML20126D160 | 14 April 1980 | Final Deficiency Rept Re Improper Installation of Shaft Fans for Pump Motors.Caused by Improper Location of Drive Fans Causing Excessive Motor & Motor Bearing Temps.Inboard & Outboard Shaft Drive Fans Interchanged by Contractor | |
ML20126F808 | 22 December 1992 | Part 21 Rept Re Possible Condition of Gag Plug in Cap of Valves That Cause Valves Not to Lift to Requirement for Providing Full Capacity.Affected Customers Notified.Removal of Caps &/Or Gag Plugs Recommended | |
ML20127N062 | 13 May 1985 | Part 21 Rept Re Incorrect Short Time Delay Band Lever Inadequately Installed in Low Voltage K-line Circuit Breaker Electromechanical Overcurrent Trip Device.Visual Insp to Determine If Correct Lever Installed Recommended | |
ML20133B251 | 16 September 1985 | Part 21 Rept Re Defective Electronically Coded Vinyl Key Cards,Pyrotronics Model 1310,used for Security Electronic Access Control Sys.Initially Reported on 850913.Five Defective Cards Destroyed.New Cards Will Be Tested | |
ML20137S444 | 26 November 1985 | Part 21 Rept Re Unparallel Fitup of Nut to Mating Surface of Connecting Rod Cap & Nonperpendicular Faces of Nuts to Thread Pitch Line.Nuts & Bolts in Assembled Calvert Cliffs Onsite Spare Engine Will Be Replaced | |
ML20137X389 | 27 February 1986 | Part 21 Rept Re Possible Defect in Model KMG-HRH Noble Gas Radiation Monitor W/Enhanced Detector Model KDGM-HR. Initially Reported on 860222.Vendor Will Request Utils for Listed Plants to Determine If Monitors Defective | |
ML20153F415 | 12 August 1988 | Part 21 Rept Re Procurement of Heat Tracing Matls from Nelson Electric Corp Not Meeting 10CFR21 Requirements. Initially Reported on 880810.Nelson Electric Corp Removed from Approved safety-related Vendor List | |
ML20197J637 | 12 May 1986 | Part 21 Rept Re Possibility of Power Supply hang-up When Energizing Slv Relays.Changes Made in Power Supply Circuitry.Slv Relays,W/Mods Incorporated in Latest Designs, Extensively Tested W/O Power Supply Failures | |
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 | |
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 | |
ML20207T806 | 20 February 1987 | Part 21 & Deficiency Rept Re Defect in Recirculation Spray Hxs.Initially Reported on 870218.Original HX Design Did Not Consider External Pressurization of Diaphragm Seal Plate W/O Presence of Internal Pressure as Balance.Mods Scheduled | |
ML20211E166 | 28 January 1987 | Part 21 & Deficiency Rept Re Rockwell Engineering Co Steel Columns W/Laminations in Web.Initially Reported on 861112. Ultrasonic Testing of Suspect Matls Completed.Action Plan to Replace 13 Defective Columns Summarized | |
ML20211H791 | 30 September 1997 | Part 21 Rept Re Failure of Weldment Associated w/lube-oil Piping Sys on 970804 at Millstone,Unit 2.Root Cause Is Not Yet Known.Quality of Weldment Is Being Considered.Listed Util Sites Affected | |
ML20211M649 | 8 October 1997 | Addenda 1 to Part 21 Rept Re Weldments on Opposed Piston & Coltec-Pielstick Emergency stand-by Diesel gen-set lube-oil & Jacket Water Piping Sys.Revised List of Potentially Affected Utils to Include Asterisked Utils,Submitted | |
ML20214F977 | 7 November 1986 | Part 21 Rept Re New Svc Water Spray Array Sys Supports Supplied by Inland Steel Co.Util Will Provide Positive Identification & Ultrasonic Testing Results of Suspect Matl. Identification Process Will Be Complete by 861201 | |
ML20214H752 | 12 November 1986 | Part 21 Rept Re Potential Defect in New Svc Water Spray Array Support Sys Mfg by Inland Steel Co.Initially Reported on 861107.Positive Identification & Ultrasonic Testing of Suspect Matls Will Be Completed by 861201 | |
ML20217H871 | 15 October 1997 | Part 21 Rept Re Potential Safety Hazard for Some 3/4 Sch 40 Pipe Shipped to CP&L & VA Power Corp.Matl Has Been Found to Have Areas Where Wall Thickness Falls Below Minimum Allowed by SA 312 Specification.Customers Have Been Notified | |
ML20235U027 | 7 October 1987 | Part 21 Rept Re Westinghouse Plant Steam Generator Tubes Susceptible to High Cycle Fatigue Failure Similar to 870715 Event at North Anna Unit 1.Caused by Mean Stress in Tube & Superimposed Alternating Stress | Flow Induced Vibration |
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 | |
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 | |
PLA-1872, Second Interim Deficiency Rept Re GE Reactor Mode Switch. Initially Reported on 830407.Mode Switch Redesigned.Sample Will Be Independently Tested.Also Reported Per Part 21.Final Rept Will Be Submitted by Dec 1983 | 30 September 1983 | Second Interim Deficiency Rept Re GE Reactor Mode Switch. Initially Reported on 830407.Mode Switch Redesigned.Sample Will Be Independently Tested.Also Reported Per Part 21.Final Rept Will Be Submitted by Dec 1983 | |
PLA-1902, Interim Deficiency Rept Re Isolation of Nitrogen Makeup Sys. Also Reportable Per Part 21.Initially Reported on 830912. Permanent Design Mod Will Be Implemented.Final Rept Will Be Submitted in Dec 1983 | 10 October 1983 | Interim Deficiency Rept Re Isolation of Nitrogen Makeup Sys. Also Reportable Per Part 21.Initially Reported on 830912. Permanent Design Mod Will Be Implemented.Final Rept Will Be Submitted in Dec 1983 | |
RBG-18701, Attachment of Final Deficiency Rept DR-138 Re ITE-Gould Type 2150 Overload Relays Out of Calibr.Relays Sent Back & Replaced w/L10 Overload Relays.Response to Request for Addl Info Re Surry & North Anna SPDS Encl | 20 August 1984 | Attachment of Final Deficiency Rept DR-138 Re ITE-Gould Type 2150 Overload Relays Out of Calibr.Relays Sent Back & Replaced w/L10 Overload Relays.Response to Request for Addl Info Re Surry & North Anna SPDS Encl | Safe Shutdown |