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MAIN RESULTS OF THE TASK

TW4-TSW-001-D1a: Recycling. MAIN RESULTS OF THE TASK. Report: Feasibility of fusion waste recycling Reference: R-4056, February 2005; L. Ooms, V. Massaut. Garching, January 17th, 2006: L. Ooms. Experience in fission technology. Discussion with melting facilities: Siempelkamp (Germany)

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MAIN RESULTS OF THE TASK

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  1. TW4-TSW-001-D1a: Recycling MAIN RESULTS OF THE TASK Report: Feasibility of fusion waste recycling Reference: R-4056, February 2005; L. Ooms, V. Massaut Garching, January 17th, 2006: L. Ooms

  2. Experience in fission technology • Discussion with melting facilities: • Siempelkamp (Germany) • Studsvik (Sweden) • Socodei (France) • Duratek (US) • Discussion with manufacturers of complex pieces (PLANSEE,Austria).

  3. Experience in fission technology Nuclear melting facilities: • Goals for fission industry: • Homogenization • Decontamination • Volume reduction • Present installations => No remote control (but possible) • Feasible to treat material up to 1000 Bq/g (hands on) • Melting points determined by the oven lining • Products of melting are simple • Severe filtration system

  4. Experience in fission technology Materials treated up to now: • Low activities: limit value around 200 Bq/g • Transport regulation is also a limit to take into account. • Materials treated up to now: Al, SS, CS, Pb, Zn and brass. • Material separation during melting: • Separation possible if delta T > 200°C • Very few practical experience • Danger for cross-contamination • Between materials • Between oven liner and materials

  5. Feasibility of fusion waste recycling Recycling of fusion materials is rather complex and challenging (1) • Wide range of materials, joined using special bonding techniques. • Joining Technologies • Brazing • Electron Beam Welding • Diffusion Bonding • Hot Isostatic Pressing • Casting • Sophisticated testing during fabrication • Non-Destructive Examination • Radiography • Ultrasonic • Thermography • Hot Helium Leak Tests.

  6. Feasibility of fusion waste recycling Recycling of fusion materials is rather complex and challenging (2) • High dose rate • Parameters not yet known: • Impurities • Build up of activation products • Effects on material properties • Dose rate and activity level • Waste treatment: slag, dust, tritium

  7. Feasibility of fusion waste recycling

  8. Conclusions (1) Recycling of fusion materials is not obvious, several challenges have to be overcome • Define the techniques for recycling, since melting is only a partial solution. • Recycling includes also separation and fabrication of the parts. • Availibility of detritiation processes • Available capacity is too low, so recycling plants have to be build. • Hands on recycling is excluded (limit is 1000 Bq/g), even after 100 years of decay.

  9. Conclusions (2) • To cope with the findings of the final PPCS report (no waste burden in recycling is applied) it is important to show to the public that recycling can be applied on fusion materials. • Do not make the same mistake as in fission technology!

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