Integrated Commissioning Status on 12.03.2021

While the JT-60SA was completing some final commissioning steps, last Tuesday, at about 9PM JST, during high voltage commissioning of one of the poloidal field coils there was an unexpected increase of current. The magnet is now being warmed from cryogenic temperature all the way to room temperature so that access in the cryostat can be gained, to verify the exact problem and then immediately set out remedial actions.

A root cause analysis will also be carried out to make sure such problem will not happen again and to transfer this experience to the ITER colleagues