Model Coils for the Central Solenoid and Toroidal Field Coils in ITER

In the six-year Engineering Design Activity (EDA) for the International Thermonuclear Experimental Reactor (ITER)¹, some of the major R&D tasks are in the model coil program. One Central Solenoid (CS) and one Toroidal Field (TF) model coil are being designed and manufactured under the collaboration of the European Union, Japan, the Russian Federation and the USA. Both coils will demonstrate the manufacturing technology required for the full-scale coil systems and the CS model coil will be the largest 13 T superconducting system ever built (640 MJ). Forced-flow cooled superconductors are being manufactured in a shared effort by the four ITER Parties for the various stages of fabrication, that is, Nb₃Sn superconducting strand production, cabling, jacket material manufacture, and jacketing of conductors. The coils will be tested in two separate facilities with participation by all Parties. Component R&D is also underway in areas such as conductor and joint performance, jacket and insulation material properties, and manufacturing processes for large steel structure fabrication. This paper summarizes the status of the program.