Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • Making remote handling less remote

    Over a wet and windy three-day period on the ITER site in November, around 90 representatives of the ITER Organization, the Domestic Agencies of Europe and Japa [...]

    Read more

  • The framework for sharing ITER intellectual property

    In signing the ITER Agreement in 2006, the seven ITER Members were agreeing not only to share in the costs of constructing and operating the ITER facility, but [...]

    Read more

  • Wendelstein achieves ultra-precise magnetic topology

    A recent article in the online journal Nature Communications confirms that the complex topology of the magnetic field of Wendelstein 7-X—the world's largest ste [...]

    Read more

  • The Matrix, rigid and fluid

    A fast-growing array of structures and buildings has been emerging across the ITER worksite platform under the control and supervision of the European Domestic [...]

    Read more

  • By road, river and sea

    They travelled by road from the Air Liquide factory near Grenoble, sailed down the Rhône River from Lyon and entered the Mediterranean to the east of Fos-sur-Me [...]

    Read more

Of Interest

See archived articles

New conductor developed for ITER's in-vessel coils

-Sabina Griffith

A comparison of the ITER Design Point and the actual size of the near-scale conductors provided by ASIPP and Tyco. This conductor, the largest of its kind ever, consists of a stainless steel jacket, magnesium oxide insulation, copper alloy to conduct current and a water-cooling channel in the centre. (Click to view larger version...)
A comparison of the ITER Design Point and the actual size of the near-scale conductors provided by ASIPP and Tyco. This conductor, the largest of its kind ever, consists of a stainless steel jacket, magnesium oxide insulation, copper alloy to conduct current and a water-cooling channel in the centre.
The question of how to improve control of Edge Localized Modes (ELMs) and the vertical stability (VS) of the ITER plasma will be one of the key issues addressed in next week's meeting of the ITER Science and Technology Advisory Committee (STAC). And there will be good news to discuss. In the six short months since the Preliminary Design Review performed in October last year, the in-vessel coil design team led by the Princeton Plasma Physics Laboratory (PPPL) worked with two suppliers from Canada and China to fabricate the largest Stainless Sheath Mineral Insulated Conductor (SSMICC) ever produced in the world.  
 
ASIPP and Tyco conductor samples, 100 mm long. Once received at PPPL, the prototypes were cut, pushed, pulled, bent, heated, electrified, sliced and x-rayed to evaluate their mechanical and electrical properties. (Click to view larger version...)
ASIPP and Tyco conductor samples, 100 mm long. Once received at PPPL, the prototypes were cut, pushed, pulled, bent, heated, electrified, sliced and x-rayed to evaluate their mechanical and electrical properties.
"Because of their proximity to the plasma, conductors with conventional insulation schemes were not an option for the in-vessel coils," says Edward Daly, the mechanical engineer who led the design efforts. The team therefore decided to choose SSMIC for its ability to withstand ITER's high radiation and bake-out temperatures of 200°C.
 
The sheer scale required for the ELM and VS coils in ITER, however, is much larger than anything produced previously. In June, contracts were awarded to the Institute of Plasma Physics at the Chinese Academy of Science (ASIPP) based in Hefei, China and to Tyco Thermal Controls, Ltd in Ontario, Canada, who both developed prototypes within four months. Once received at PPPL, the prototypes were cut, pushed, pulled, bent, heated, electrified, sliced and x-rayed to evaluate their mechanical and electrical properties.
 
"In general, the conductor samples performed as we had hoped and expected," says Ed Daly. "There were no show-stoppers, but there is still work to do." The results will be used in the final design and prototyping phase, planned to start in July. ASIPP has expressed interest in manufacturing these coils and has proposed collaboration with PPPL.
 
ITER's in-vessel coils—another example of world-spanning cooperation.


return to the latest published articles