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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 | |
| ML20153D019 | 18 September 1998 | Part 21 Rept Re Defect in Gap Conductance Analyses for co- Resident BWR Fuel.Initially Reported on 980917.Corrective Analyses Performed Demonstrating That Current Operating Limits Bounding from BOC to Cycle Exposure of 8 Gwd/Mtu | Fuel cladding |
| ML20153C677 | 17 September 1998 | Part 21 Rept Re Defect Relative to MCPR Operating Limits as Impacted by Gap Conductance of co-resident BWR Fuel at Facilities.Operating Limit for LaSalle Unit 2 & Quad Cities Unit 2 Will Be Revised as Listed | |
| ML20236N675 | 9 July 1998 | Part 21 & Deficiency Rept Re Notification of Potential Safety Hazard from Breakage of Cast Iron Suction Heads in Apkd Type Pumps.Caused by Migration of Suction Head Journal Sleeve Along Lower End of Pump Shaft.Will Inspect Pumps | |
| ML20198K508 | 6 January 1998 | Part 21 Rept Re Transient Analyses at Exposures Prior to End of Cycle.Caused by Component Defect.Notified Commonwealth Edison of Defect & Provided Revised Limits by Siemens Power Corp | |
| ML20203B369 | 10 December 1997 | Part 21 Rept Re Potential to Exceed Operating Limits.Cycle 8 Delayed Until Fall 1998 | |
| ML20134Q080 | 27 November 1996 | Part 21 Rept Re Deficiency of Wkm Model 70-13 Pneumatic Actuators Manufactured by Anchor Darling Valve Company Due to Incorrect Calculation of Bench Set & Supply Air Set Points.All Affected Valves Have Been Reviewed & Evaluated | Anchor Darling |
| ML20128F501 | 4 October 1996 | Part 21 Rept & Deficiency Rept Re Wkm Model 70-13 Pneumatic Actuators Mfg by Anchor Darling Valve Co.All Affected Valves Being Reviewed/Evaluated & Design Changes Are Being Initiated as Required | Anchor Darling |
| ML20117P314 | 11 September 1996 | Part 21 Rept Re Deficiency of GE Type RMS-9 Overcurrent Trip Device Programmers | Safe Shutdown Water hammer |
| ML20082B527 | 28 March 1995 | Part 21 Rept Re Notification 9505 Automatic Switch Co Pilot Solenoid Valve Model NP8323A20V.Caused by Failures of MSIVs to Close to Asco Pilot Solenoid Valves.Subj Valves Replaced W/Valcor 3-way Solenoid Valves | Time of Discovery |
| ML20082E190 | 27 March 1995 | Part 21 Rept Re Sticking of B Core Assembly to Plugnut on Automatic Switch Co Dual Solenoid Valve Model NP8323A20V. Unit 2 Valves Replaced.Unit 1 Valves Will Be Replaced | Time of Discovery |
| ML20069A863 | 17 May 1994 | Final Part 21 Rept Re Secondary Containment Isolation Techno Corp Dampers Equipped W/Parker Hannifin Air Cylinders at LaSalle County Station.All Units 1 & 2 Techno Dampers Equipped W/Parker Air Cylinders Replaced | |
| ML20070N345 | 2 May 1994 | Part 21 Rept Re Failures of Limit Switch Series EA740-86700 Mfg by Namco Controls Co Due to Excessive Amount of Grease on Contact Block & Contact Carrier & Wrong Matl of O-ring. Series EA740-86700 Switches Replaced w/EA740-50100 Switches | |
| ML20063D086 | 2 February 1994 | Part 21 Rept Re Possible Anomaly W/Namco Controls EA740 & EA750 Series Limit Switches.Investigation in Progress & Has Not Been Concluded.Vendor Will Advise NRC within Next Thirty Days Re Matter as Addl Info Becomes Available | |
| 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 | |
| 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 | |
| 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 | |
| ML20207J849 | 25 July 1986 | Part 21 Rept Re Potential Change in Allowable Operating Repeatability Ranges for 1E Qualified Series 9,8 & 1 Pressure Switches.Licensee Calibr Procedures Should Be Amended to Allow for Cycling (Hysteresis) Effects | |
| ML20198R575 | 3 June 1986 | Part 21 Rept Re Failure of 103/B212 Type Differential Pressure Switches to Give Scram During 860601 Feedwater Transient.Investigation Continuing | |
| 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 | |
| ML20128G510 | 24 May 1985 | Part 21 Rept Re Heat Numbers to Be Added & Deleted from Sublist Sheet A,Based on Review of NRC | |
| 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 | |
| ML20099F392 | 8 November 1984 | Part 21 Rept Re Hexcel/Mci Pipe Restraints Found W/Average Dynamic Crush Strength Values Below Acceptable Values. Initially Reported on 841101.Replacement Program in Progress | |
| ML20096A544 | 21 August 1984 | Part 21 Rept Re Ground Fault Failures of Actuation Solenoids for Crosby Safety Relief Valves PRC 84-24.Problem Still Considered Germane Condition.Memo of 840808 Telcon Updating 840615 Interim Rept Encl | |
| ML20083J773 | 22 December 1983 | Final Deficiency Rept Re Defective GE Hma Relays.Initially Reported on 830805.Two Relays Found to Have Insufficient Armature Clearance.Adjustments Made | |
| ML20082Q692 | 2 December 1983 | Final Deficiency Rept 83-07 Re Design Calculation for Fire Water Sys.Initially Reported on 831102.Preliminary Calculations Completed.Final Rept Will Be Submitted Approx 20 Days Prior to Exceeding 5% Power | |
| ML20085K636 | 12 October 1983 | Final Deficiency Rept 83-06 Re Asco Solenoid Valves in Control Rod Drive Sys.Initially Reported on 830912.Valves W/Defective Solenoid Plunger Housings Replaced & Spare Parts in Inventory Examined.Plant Operable | |
| ML20077N615 | 1 September 1983 | Interim Deficiency Rept 83-05 Re Potentially Defective GE Hma Relays Mfg in 1974.Initially Reported on 830805.Two Relays Found W/Insufficient Armature Clearance.Clearance Adjusted.Final Rept Expected by 830923 | |
| ML20076A822 | 8 August 1983 | Corrects Final Deficiency Rept 83-01 Re Riley Temp Indicating Switches.Riley Temp Switches Not Recalibr to Modified Calibr Procedure.Calibr to Be Done Prior to Fuel Load | |
| ML20077A896 | 15 July 1983 | Final Rept Re Potentially Defective Figures 425,426 & 428 Spring Hangers Mfg by Elcen Metal Products Co.Initially Reported on 830617.Review Revealed Spring Hanger Installed at Facility Not Type in Question.Item Closed | |
| ML20024B777 | 7 July 1983 | Final Deficiency Rept 83-03 Re Medium Voltage Circuit Breakers of Same Type Installed at Limerick Which Inadvertently Closed After Completion of Spring Charging Due to Slipped Close Latch,Discussed in Brown Boveri 830524 Ltr | |
| ML20072A737 | 3 June 1983 | Final Deficiency Rept Re Problems W/Riley Temp Switches. Initially Reported on 830316.Based on Engineering Evaluation by Riley,Switches Accurately Perform Intended Function When Calibr W/Modified Procedure | |
| ML20083L975 | 27 May 1983 | Part 21 Rept Re Failure of Circuit Breakers During Environ Testing.Test Results Indicate That Temp Sensitivity Problem May Be Generic to All Ite Imperial Corp thermal-magnetic Circuit Breakers Calibr for 40 C Svc | |
| ML20074A310 | 4 May 1983 | Part 21 Rept Re Defect in Shielded Multiconductor Cable Installed in HVAC Control Panels.Mcc Powers Personnel Attached Hold Tags to 13 HVAC Control Panels W/Defect. Evaluation Being Conducted | |
| ML20073T142 | 3 May 1983 | Updated Interim Deficiency Rept Re Offset & Module Problems of Riley Temp Indicating Switches in Leak Detection Sys. Calibr Procedure Modified.Final Resolution of Module Problem (Hardware Mod) in Progress.Final Rept Expected by 830601 | |
| ML20073S673 | 2 May 1983 | Interim Deficiency Rept 83-01 Re Temp Offset Problems Experienced W/Riley Temp Switches Installed in Leak Detection Sys.Calibr Procedure Modified & Switches Recalibr. Final Rept Will Be Submitted by 830601 | |
| ML20024B784 | 28 April 1983 | Followup Interim Rept Re Potential Deficiency in 5HK Switchgear Supplied by Brown Boveri.Circuit Breaker Inadvertently Closed & Tripped Following Spring Charging. Light Spring Added to Close Latch | |
| ML20074A204 | 26 April 1983 | Interim Deficiency Rept Re Misapplication of Ite Gould Circuit Breakers in post-LOCA Hydrogen Recombiners Supplied by Rockwell Intl.Initially Reported on 830328.Matter Under Investigation.Final Rept by 830808.Reported Per Part 21 | |
| ML20074A319 | 18 April 1983 | Part 21 Rept Re Defect in Shielded Multiconductor Cable Installed in HVAC Control Panels.All Suspect Panels Inspected & Nonconformance Rept Will Be Issued for Applicable Sites | |
| ML20073F675 | 7 April 1983 | Final Const Deficiency Rept 82-07 Re Shop Welding by Unauthorized Welders.Zack Co Officially Withdrew Part 21 Rept on 820914 Based on Results of Investigation | |
| ML20072P731 | 30 March 1983 | Revised Final Deficiency Rept 81-06 Re Crosby Safety Relief Valve IMF-2 Solenoid Valve.Solenoids Have Had Qualified Collet/Yoke Assembly Installed,Closing Out Undervoltage Concern.Valves Qualified Per NUREG-0588 | |
| ML20069E450 | 16 March 1983 | Final Deficiency Rept Re Significant Deviation from Performance Specs for Sor,Inc Pressure Switches Installed as Part of ECCS Interlock Mod.Initially Reported on 830216. All Leaking O-rings Replaced | Hydrostatic |
| ML20069E667 | 16 March 1983 | Interim Deficiency Rept 83-01 Re Significant Deviation from Performance Specs for Riley Temp Switches in Leak Detection Sys.Initially Reported on 830215.Two Units Returned to GE for Evaluation.Temp Module Resolution Expected by Apr 1983 | |
| ML20074A222 | 11 March 1983 | Part 21 Rept Re Failure of post-LOCA Hydrogen Recombiner Component During IEEE-323 Qualification Program.Circuit Breaker Not Properly Selected for Specific Application.Plant Operators Notified of Deviation | |
| ML20071E919 | 1 March 1983 | Final Deficiency Rept 82-08 Re Electrical Penetration Assemblies.Initially Reported on 820817.Replacement Modules Will Be Installed by 830501 | |
| ML20070R852 | 24 January 1983 | Interim Deficiency Rept 82-08 Re Electrical Penetration Assembly Butt Splices.Replacement Modules for Awg Cable Modules 2 & 6 Ordered from Conax.Final Rept Will Be Provided on or About 830303 | |
| ML20028E651 | 21 January 1983 | Final Deficiency Repts 82-10 & 11 Re Rigid Strut Pins Mfg by Elcen.Initially Reported on 821223.Test Results Indicate No Load Capacity Data Values Violated.If Such Pins Were Used,Design Margins Not Exceeded | |
| ML20073J521 | 14 December 1982 | Part 21 Rept Re Likely Failure of post-LOCA Hydrogen Recombiner Component,Dpst Toggle Switch 12TSI-2 Due to Aging & Radiation.Field Bulletins Issued to Install Jumpers Bypassing Switch | |
| ML20079J792 | 14 December 1982 | Interim Deficiency Rept Re Inadequate Pressure Transducers/ Transmitters Mounted on post-LOCA Hydrogen Recombiners. Initially Reported on 821119.Final Rept Will Be Submitted by 830211.Also Reported Per Part 21 | |
| ML20066J513 | 18 November 1982 | Final Deficiency Rept Re Overtorqued Anchor Bolts on ECCS Pump Foundation.Initially Reported on 821019.Recheck of Torque Values to Be Performed by 821206.Sargent & Lundy 821110 Evaluation of Anchor Bolt Status Encl |