| 摘要 |
PROBLEM TO BE SOLVED: To provide a composition for neutron shielding material having high heat resistance and securing neutron shielding capacity, and a neutron shielding vessel manufactured therefrom. SOLUTION: This composition for the neutron shielding material includes (1) as an indispensable epoxy component, and also includes one or more kinds of epoxy compound having heat resistance and epoxy compound having high hydrogen content, a hardener component having one or more ring structures and plural amino groups, and a boron compound. The composition includes many compounds having high crosslinking density or many ring structures, and hereby a heat resistant structure is imparted thereto, and the composition secures the hydrogen content for decelerating the neutrons. Therefore, the composition having excellent heat resistance compared with hitherto and securing the neutron shielding capacity can be provided. In addition, the neutron shielding vessel manufactured from the composition, capable of suitably storing and keeping a spent nuclear fuel for a long period is also provided.
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