Kabushiki Kaisha Toshiba

Takashi Ishitori

Nobuhiko Tanaka

Akira Nakamura

Kiyoshi Hattori

Tadashi Narabayashi

Hiroshi Miyano

Iwao Ohshima

Hiroshi Masumoto

Katsumi Yamada

Yasuhiko Aida

Takao Fujii

Osamu Ozaki

Katsuhiko Mawatari

Hideo Komita

Shigeaki Tsunoyama

Nobuo Tachikawa

Tsutomu Honda

Kunio Shimano

Masaru Nakai

Iwao Oshima

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.

Internal component of fusion reactor

A boiling water reactor comprises a reactor pressure vessel accommodated in a vertical fashion, a core disposed at a low portion in the reactor pressure vessel, a plurality of control rods to be inserted from an upper side of the core into the spaces between adjacent fuel assemblies and withdrawn therefrom upwardly, a shroud surrounding the fuel assemblies so as to define the core and having an upper end opening, a shroud head which closes the upper end opening of the shroud and through which the control rods are inserted or withdrawn, a separator standing upward from the shroud head to carry out gas-water separation of steam generated from the core, a fixing pedestal disposed above the separator, a control rod driving mechanism mounted on the fixing pedestal and adapted to drive the control rods, a drier unit including a plurality of drier elements annularly arranged along an upper inner wall surface of the reactor pressure vessel and adapted to dry the steam passing through the steam flow hole of the fixing pedestal, and a jet pump unit disposed in a space between an outer surface of the shroud and an inner wall surface of the reactor pressure vessel.

Boiling water reactor

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Yokohama, Japan

Takashi Ishitori