Containment cask for radioactive material

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United States of America Patent

PATENT NO 9779844
SERIAL NO

15172806

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Importance

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Abstract

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To provide a containment cask for storage or transport of radioactive material, without employing a homogenization treatment. Pouring a molten lead between an inner shell 2 and an intermediate shell 3 to serve as a gamma ray shielding material, allowing the lead to cool, and subsequently, filling either one or both of a first void layer 9a formed at a boundary between the inner shell 2 and the poured lead 5a or a second void layer 9b formed at a boundary between the intermediate shell 3 and the poured lead 5a, using a low melting point metal 10 in a closely adhering state. To provide the cask 1 with a good heat-dissipating effect, by filling the void layers 9a, 9b that prevent the cask 1 from dissipating heat, with the low melting point metal 10 that has a superb thermal conductivity.

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Patent Owner(s)

Patent OwnerAddress
HITACHI ZOSEN CORPORATIONOSAKA-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arai, Hiroaki Osaka, JP 60 669
Ashida, Satoshi Osaka, JP 14 125
Kitamura, Koji Osaka, JP 36 389
Ma, Toki Osaka, JP 1 1
Okada, Jyun Osaka, JP 1 1

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