RADIOISOTOPES

Plasma diagnostic systems make penetrations through plasma facing components, shielding blankets, safety boundary, fire sector and ventilation zoning, and hence, it is required to demonstrate its feasibility of nuclear safety. ITER is a first of a kind nuclear fusion reactor, in which nuclear safety design shall be built-in even in the diagnostic systems. This paper describes what the authors have found in the design activity of ITER poloidal polarimeter that Japan procures. The knowledge can be extrapolated for designing plasma diagnostic systems in future nuclear reactors such as prototype reactors.