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Mid-Year Client Review

A pparatus for the R emoval of C admium. Mid-Year Client Review. Joseph Seegmiller Alan Chatterton Doug Smith Walter Taresh. November 30, 2010. Agenda. BACKGROUND PROJECT GOAL SPECIFICATIONS REVIEW CLEANING PROCESS REVIEW MOCK-UP CADMIUM BUILD-UP SIMULATION

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Mid-Year Client Review

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  1. Apparatus for the Removal of Cadmium Mid-Year Client Review Joseph Seegmiller Alan Chatterton Doug Smith Walter Taresh November 30, 2010

  2. Agenda • BACKGROUND • PROJECT GOAL • SPECIFICATIONS REVIEW • CLEANING PROCESS REVIEW • MOCK-UP • CADMIUM BUILD-UP SIMULATION • MATERIAL REMOVAL METHODS

  3. MARK IV ELECTROREFINER

  4. Build-UP on anode Shaft

  5. Electro Mechanical Manipulator

  6. PROJECT GOAL • Design of a semi-automated system capable of removing cadmium buildup from the electrode assembly shaft of the Mark IV Electrorefiner to prevent electrical shorting between the electrode and vessel.

  7. SPECIFICATIONS REVIEW • Incorporation without interference with existing operations • Cleaning cycle time of 2 hours • Apparatus life of 100 cleaning cycles • Operate in high radiation environment • Capture majority of removed cadmium • Setup and operation with Master-Slave Manipulators (MSM) • 15 Pound force limit for MSM • No petroleum-based lubricants • Vertical load limit 200 pounds • Remote replacement defective parts/subassemblies • Shaft capable of rotation and up and down motion

  8. Cleaning Process Review Electrode assembly removed from chamber Assembly brought to handling station

  9. Lower part of assembly removed Heat shield is removed, shaft is exposed

  10. Cadmium removed using files, scrapers, etc.

  11. Exploded Drawing for MOCKUP

  12. MOCKUP STATUS • CURRENT STATE Mill Attachment Point Original Component Bearing Retaining Sleeve Added Length

  13. MOCKUP STATUS • STILL TO MACHINE Drill and tap Machine part Choose material and machine

  14. Shaft Mounted in mill

  15. Cadmium Build-UP Simulation • SURRAGATE MATERIALS • Brass – soft, comparable to cadmium • Aluminum – harder than cadmium, but still relatively soft • Silver Solder – soft, though difficult to solder to SS • Wax – much softer, though easy to work with • Spray foam – hardens to solid, easy to use

  16. Silver solder on SS Rod • Benefits • Similar to Cadmium • Difficulties • Will not lay down thick

  17. MATERIAL REMOVAL METHODS • FINE, COURSE AND MILLED TOOTH FILES • Fine file - gummed easily, removed 0.006” from diameter in 2 minutes* • Course file - did not gum as easily, removed 0.040” from diameter in 2 minutes • Milled Tooth file - did not gum, removed 0.100” in 1-2 minutes *Amount of material for one file blade width (app. 1.25”)

  18. Fine tooth file • Gummed easily, removed 0.006” from diameter in 2 minutes

  19. Course double-cut file • Did not gum as easily, removed 0.040” from diameter in 2 minutes

  20. Milled tooth file • Did not gum, removed 0.100” from diameter in 1-2 minutes

  21. SINGLE POINT TOOL BIT • More rugged than three point insert

  22. Three Point Insert Tool Bit • Three separate cutting teeth for potential ease of tool replacement.

  23. Work Plan • By December 17th: • Finish machining the mockup • Provide mid-year report detailing current status • Choose best material removal method • Spring semester: • January 12th: Begin system-level design with best cutting method • February 21st: Interim report outlining system-level design • April 4th: Completion of prototype • April 29th: Demonstrate apparatus at Design Expo

  24. Questions?

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