Kabushiki Kaisha Toshiba

Yohei Nishiguchi

Yasushi Tsuboi

Tsugio Yokoyama

Hisato Matsumiya

A nuclear reactor in which a primary coolant is contained, the primary coolant moves upwardly from the core by an operation thereof. An annular steam generator is arranged in an upper side of the core into which the upwardly moving primary coolant flows and transfers heat in the primary coolant into water therein to generate a steam. A passage structure defines a coolant passage for the primary coolant to an outside of the core. The heat-transferred primary coolant in the annular steam generator flows downwardly in the coolant passage so as to flow into the core, thereby moving upwardly. A reactor vessel is arranged to surround the coolant passage so as to contain the core, the annular steam generator and the passage means therein.

Liquid cooled nuclear reactor with annular steam generator

A reactivity control rod adapted to be used in a reactor core of a fast reactor and disposed at a substantially central portion of the reactor core for controlling a reactivity therein. The reactivity control rod includes a wrapper tube surrounded by a plurality of fuel rods in a reactor core, and a plurality of neutron absorber rods arranged in the wrapper tube. At least one of the plurality of neutron absorber rods includes a cladding tube and a mixture filled in the cladding tube. The mixture is composed of a neutron absorber that absorbs a neutron and a neutron moderator that moderates the neutron.

Reactivity control rod for core

A steam generator utilized for a liquid-metal coolant reactor comprises an outer shell body in which an electromagnetic pump is arranged. The electromagnetic pump comprises a hollow cylindrical iron core provided with comb-shaped portion at an outer peripheral surface thereof and an annular stator coil means assembled in the comb-shaped portion of the cylindrical iron core. A main passage of liquid metal is formed on a side on which the stator coil of the iron core is assembled and a cooling bypass passage is formed at substantially the central portion of the cylindrical iron core in a vertically penetrating fashion.

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Kawasaki, Japan

Yohei Nishiguchi