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    • 4. 发明专利
    • Transportation cask for radioactive material and installation method for sealed vessel
    • 放射性物质的运输箱和密封船的安装方法
    • JP2003014889A
    • 2003-01-15
    • JP2001200175
    • 2001-06-29
    • Mitsubishi Heavy Ind Ltd三菱重工業株式会社
    • MATSUNAGA KENICHIABE IWAJIKAMI KOICHIENAMI KOJIWAKAYAMA SEIICHIKITA YOSHINAGAINOUE SHIZUO
    • G21C19/32G21F5/00G21F5/08G21F5/12
    • G21F5/12Y10T137/6866Y10T137/86308
    • PROBLEM TO BE SOLVED: To provide a transportation cask capable of preventing contamination of canister outer surface during installing radioactive materials and a canister, arid simplifying the installation work. SOLUTION: The transportation cask is provided with a nearly cylindrical main body 10, and in the body, a canister 30 containing spent fuel assemblies is contained. The upper end opening of the vessel body 32 of the canister is closed with a primary lid 42 and a secondary lid 44. In between the upper end inner surface of the main body and the upper end outer surface of the vessel body 32, an annular elastic tube 50 is provided to seal them, which prevent fluid from invading in the gap between the canister outer surface and the main body inner surface from the upper opening side of the main body. In between the upper end inner surface of the main body and the upper end outer surface of the vessel body 32, an inspection space 16 is formed to insert an inspection probe for detecting the welding state of the primary lid and the secondary lid.
    • 要解决的问题:提供一种在安装放射性物质和罐时能够防止罐外表面污染的运输桶,并且简化了安装工作。 解决方案:运输桶具有近似圆筒形的主体10,并且在主体中包含容纳乏燃料组件的罐30。 罐体的容器主体32的上端开口用主盖42和副盖44封闭。在主体的上端内表面和容器主体32的上端外表面之间,环形 提供弹性管50以密封它们,防止流体从主体的上部开口侧侵入到罐外表面和主体内表面之间的间隙中。 在主体的上端内表面和容器主体32的上端外表面之间,形成检查空间16,以插入用于检测主盖和辅助盖的焊接状态的检查探针。