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Purdue University HEU to LEU Conversion of PUR-1 Status Report

Purdue University HEU to LEU Conversion of PUR-1 Status Report. TRTR Annual Meeting Lincoln City, OR September 2007. PUR-1 Conversion. PUR-1 history Conversion Timeline Assembly Redesign Lessons Learned. PUR-1. MTR Pool type Lockheed Nuclear Products 10 kW design

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Purdue University HEU to LEU Conversion of PUR-1 Status Report

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  1. Purdue University HEU to LEU Conversion of PUR-1 Status Report TRTR Annual Meeting Lincoln City, OR September 2007

  2. PUR-1 Conversion • PUR-1 history • Conversion Timeline • Assembly Redesign • Lessons Learned TRTR Conference 2007 Lincoln City, OR

  3. PUR-1 • MTR Pool type • Lockheed Nuclear Products • 10 kW design • Licensed at 1kW in 1962 • Plate type, U-Al alloy clad in 1100 Al TRTR Conference 2007 Lincoln City, OR

  4. Pool Layout TRTR Conference 2007 Lincoln City, OR

  5. Core Layout • 16 fuel elements • 13 standard • 3 control • Graphite reflector • Irradiation Facility TRTR Conference 2007 Lincoln City, OR

  6. Conversion Timeline • August 2005 – Initial site visit to Purdue by NNSA/GTRI, INL and DOE-NE • October 2005 – Initial conversion analyses meeting with ANL • October 2005 – Conversion kickoff meeting with INL, Y-12 and SRS staff at Purdue • August 2006 – Conversion proposal submitted to USNRC TRTR Conference 2007 Lincoln City, OR

  7. Timeline Continued • March 2007 – RAI received from USNRC • May 2007 – RAI answers back to USNRC • May 2007 – Request for Possession Limit Extension • July 2007 – Possession Limit Order • July 2007 – Fuel Shipped to Purdue • August 2007 – NRC issues order to convert TRTR Conference 2007 Lincoln City, OR

  8. Timeline Continued • Late August – HEU core disassembly, HEU assemblies prepared for transport/final disposition • September 2007 – 23 day public comment period expires, start loading fuel on 8 September, 2 elements loaded. TRTR Conference 2007 Lincoln City, OR

  9. TRTR Conference 2007 Lincoln City, OR

  10. TRTR Conference 2007 Lincoln City, OR

  11. Timeline continued • 18 Sep 2007 – 14 of 16 elements in core • Hope for criticality next week. • Sometime in the future – Spent HEU shipped • Physics measurements need to be completed, and NRC report submitted TRTR Conference 2007 Lincoln City, OR

  12. Old HEU plate U-Al alloy 93% U-235 16.5 g U-235 per plate 1100 Al Clad 0.060 inches thick 124/148 Fueled Plates New HEU plate U3Si2-Al 19.75% U-235 12.5 g U-235 per plate 6061 Al Clad 0.050 inches thick 190/206 Fueled Plates Fuel Comparison TRTR Conference 2007 Lincoln City, OR

  13. New Plates in Summer 2006 • 14 Plates, bolted at corners, 12.5 g U-235 per plate loading • 0.146 inch plate-to-plate spacing +/- 0.020 • 190 of 206 plates predicted for target core TRTR Conference 2007 Lincoln City, OR

  14. TRTR Conference 2007 Lincoln City, OR

  15. TRTR Conference 2007 Lincoln City, OR

  16. TRTR Conference 2007 Lincoln City, OR

  17. TRTR Conference 2007 Lincoln City, OR

  18. New Standard Assembly • New plate-to plate spacing 0.144±0.015 inches (was 0.147 ±0.020) • New plate-to-wall spacing 0.127±0.008 inches (was 0.079 ±0.020) TRTR Conference 2007 Lincoln City, OR

  19. New Control Assembly • New plate-to plate spacing 0.181±0.015 inches (was 0.197 ±0.020) • New plate-to-wall spacing 0.127 ±0.008 inches (was 0.079 ±0.020) TRTR Conference 2007 Lincoln City, OR

  20. TRTR Conference 2007 Lincoln City, OR

  21. TRTR Conference 2007 Lincoln City, OR

  22. TRTR Conference 2007 Lincoln City, OR

  23. TRTR Conference 2007 Lincoln City, OR

  24. TRTR Conference 2007 Lincoln City, OR

  25. Lessons Learned • Work expands to fill time allotted • Murphy’s Law • O’Toole’s Commentary TRTR Conference 2007 Lincoln City, OR

  26. TRTR Conference 2007 Lincoln City, OR

  27. Special Thanks • Idaho National Laboratory • Argonne National Laboratory • TLI-STS • Jim Remlinger, Bill Vernetson TRTR Conference 2007 Lincoln City, OR

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