| abstract |
(57) [Summary] [PROBLEMS] To improve the work efficiency by lowering the viscosity at the time of forming a neutron shield, and to improve the heat resistance and the neutron shielding ability even in a high temperature environment for a long time after the neutron shield is formed. To maintain the given hydrogen content. SOLUTION: A long-chain aliphatic glycidyl ether-based epoxy resin containing a reactive diluent is used as a main component, and a mixture of an alicyclic polyamine, a polyamide aliphatic polyamine and an epoxy adduct is used as a curing agent for the two-part reaction cold curing epoxy resin. A neutron shield formed by blending the two-part reaction room-temperature-curable epoxy resin, high-purity aluminum hydroxide having a soda content of not more than 0.07% by weight, and boron carbide, is formed of resin 106 of cask 100, 112, 11 Used as 4. |