Internal component of fusion reactor

Abstract

A fusion reactor has an internal component in which an internal structure assembly is housed in a toric vacuum vessel in an arrangement along a circumferential direction thereof and in which a high-temperature plasma in which hydrogen and hydrogen isotopes are maintained in a plasma state is confined in a toric internal space defined in the internal structure assembly. The internal component includes a cooling structure of a multi-wall structure having multiple walls formed to the internal structure assembly and a flow channel formed in the cooling structure for a cooling fluid for extracting heat caused by plasma and a nuclear reaction. The internal structure assembly includes a plurality of outboard blanket assemblies each having a surface facing the plasma, a plurality of inboard blanket assemblies each having a surface facing the plasma and a plurality of divertor assemblies each having a surface facing the plasma, the outboard blanket assemblies and the inboard blanket assemblies and the divertor assemblies being arranged along the circumferential direction of the toric vacuum vessel and each of these assemblies being provided with the cooling structure formed on the surface thereof facing the plasma. The internal component also includes means for detecting leakage of gas.