| 摘要 |
PROBLEM TO BE SOLVED: To reduce the gap between a vessel body and a heat radiation member in a transportation cask needed for inserting a cylindrical radiation member in the vessel body in production and prevent the lowering of heat transfer and radiation efficiency and the increasing of the vessel diameter and resulting uneconomical one. SOLUTION: By separating radiation members loaded in loading holes 6 in the vessel body 2 into a plurality and attaching the separate radiation members 8a so as to contact the inner surface of the vessel body 2 by way of projections for holding 9 formed in reversed trapezoid, generation of gap between the inner surface of the vessel body 2 and the outer surface of the radiation members 5 is prevented.
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