Assembly

Before assembly of the JT-60SA tokamak could begin, the JT-60U tokamak and much of its peripherals had to be removed and temporarily stored in other controlled buildings or areas for reuse, or to allow radioactive afterheat decay. The JT-60U tokamak has now been partly re-assembled for display in the JT-60 storage building, a controlled radioactive environment. Disassembly started in April 2009, and continued even after the completion of the disassembly of the tokamak device, with disassembly and re-assembly in the radioactive controlled area in compliance with related laws and regulations.

Assembly began at the start of 2013 with the installation of the cryostat base followed by the lower poloidal field coils (EF4, 5, 6) one year later. This is followed by the vacuum vessel assembly. 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. The basic principles of the procedure are shown in this short animation.

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.