Mitsubishi Heavy Industries Limited

Naohiro Mizuno

Katsunari Ohsono

Toshihiro Matsuoka

Yoshiharu Taura

Shigenori Shirogane

Takeshi Tsunezumi

Chikayuki Matsumoto

Yoshihiko Funakoshi

Katsuhiko Tokuno

In the metal billet to be used for hot dilation forming, a forward side with respect to the pressing direction has a quadrate section and its diagonal length is not more than an inner diameter of a container. Moreover, a backward side with respect to the pressing direction has a circular section and its diameter is substantially same as the inner diameter of the container. The metal billet is heated to a temperature suitable for press working and is set into a container for press forming. While a center of a workpiece of the metal billet is being bored by a boring punch to be operated by a pressing machine, the metal billet is hot-dilated so that a bottomed container for a cask is formed.

Radioactive substance container, manufacturing apparatus thereof and manufacturing method thereof

Radioactive substance containment vessel, and radioactive substance containment vessel producing device and producing method

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Fukuoka, Japan

Naohiro Mizuno