Development of the thermal insulation devices for the JT-60SA tokamak

This report focuses on the development of the thermal insulation devices including thermal shield (TS) and cryostat for the superconducting tokamak JT-60SA.1. Design, manufacturing and acceptance test were successfully completed by 2019 and installation will be done by March 2020.2. The technique and knowledge to realize high accuracy manufacturing and short time installation of these devices will contribute to the ITER construction and DEMO design.28th IAEAFusion Energy Conferenc

Achievement of Precise Assembly of the JT-60SA Superconducting Tokamak

The JT-60 Super Advanced (JT-60SA) tokamak construction has been achieved respecting the requirements of very tight tolerance for the assembly and by handling very heavy components in a very close space environment. The construction of this large superconducting tokamak represents a big step forward in the world nuclear fusion history, opening the road for ITER and DEMO. Precise assembly is required, not only to avoid mechanical interference, but also to obtain good plasma performance by less magnetic error field. To complete this work, unique and well-considered procedures were introduced. In this paper, the developed technologies and their results are reported, focusing on the assembly of the final sector of vacuum vessel, central solenoid and in-vessel components.28th IAEAFusion Energy Conferenc