Neutron shield and cask that uses the neutron shield

摘要

A neutron shield formed by blending two-part reactive cold-setting epoxy resin consisting of long-chain aliphatic glycidyl ether epoxy resin containing reactive diluent as main component, and a mixture of alicyclic polyamine, polyamide aliphatic polyamine and epoxy adduct as hardener of the two-part reactive cold-setting epoxy resin, aluminum hydroxide of high purity with impurity soda content of 0.07 % by weight or less, and boron carbide is used as resin of a cask for containing spent nuclear fuel assemblies.