Hitachi Zosen Corporation

Toki Ma

Hiroaki Arai

Koji Kitamura

Satoshi Ashida

Jyun Okada

To provide a containment cask for storage or transport of radioactive material, without employing a homogenization treatment. Pouring a molten lead between an inner shelland an intermediate shellto serve as a gamma ray shielding material, allowing the lead to cool, and subsequently, filling either one or both of a first void layerformed at a boundary between the inner shelland the poured leador a second void layerformed at a boundary between the intermediate shelland the poured lead, using a low melting point metalin a closely adhering state. To provide the caskwith a good heat-dissipating effect, by filling the void layersthat prevent the caskfrom dissipating heat, with the low melting point metalthat has a superb thermal conductivity.

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Osaka, Japan

Toki Ma