Assembly

Before assembly of the JT-60SA tokamak can begin, the JT-60U tokamak and much of its peripherals must be removed and temporarily stored in other controlled buildings or areas for reuse, or to allow radioactive afterheat decay. The JT-60U tokamak will be partly re-assembled for display in the JT-60 storage building.

Disassembly started in April 2009, and will continue after the completion of the disassembly of the tokamak device. Disassembly and re-assembly in the radioactive controlled area need more time than normal work to comply with related laws and regulations.

Assembly will start with the installation of the cryostat base and the lower poloidal field coils (EF4, 5, 6) followed by the vacuum vessel. The toroidal field coils (TF) will then be assembled followed by the upper EF coils (EF1, 2, 3) and CS. During this phase in-vessel components will be installed in parallel. Auxiliary systems such as diagnostics, NBI and ECRF will be assembled after the tokamak has been completed.

Power supply and cryoplant will be installed in parallel with the assembly activity in the torus hall. Before operation can start, integrated commissioning of the tokamak will take place with, for example, leak tests being performed before and after baking.