“…It was reported that the plasma facing components (PFCs) [2], namely, the main parts of first wall in vessel, were partially damaged in some local areas due to the high energy particles and electromagnetic force, and had been optimized and upgraded to full graphite tiles bolted to copper alloy heat sinks from 2008 [1]. The maintenance was a long term and hard task, nevertheless, has to be carried out cyclically in future.…”