Patent Number: 
Section: claims

1. A neutron shield comprising a two-part reactive cold-setting epoxy resin produced by combining a main component of an aliphatic glycidyl ether epoxy resin, and  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct. 2. The neutron shield according to  claim 1 , further comprising boron carbide. claim 1 3. The neutron shield according to  claim 1 , further comprising aluminum hydroxide containing 0.1% by weight or less of soda. claim 1 4. The neutron shield according to  claim 1 , further comprising aluminum hydroxide containing 0.07% by weight or less of soda. claim 1 5. A neutron shield comprising a two-part reactive cold-setting epoxy resin produced by combining a main component of an aliphatic glycidyl ether epoxy resin;  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct;  a refractory comprising at least one of aluminum hydroxide and magnesium hydroxide; and  a neutron absorbing material. 6. The neutron shield according to  claim 5 , wherein the aluminum hydroxide contains 0.1% by weight or less of soda. claim 5 7. The neutron shield according to  claim 5 , wherein the aluminum hydroxide contains 0.07% by weight or less of soda. claim 5 8. A cask comprising: a neutron shield comprising a two-part reactive cold-setting epoxy resin produced by combining  a main component of an aliphatic glycidyl ether epoxy resin, and  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct, wherein the neutron shield is disposed on the outer circumference of the cask;  a shell main body which can shield gamma-rays;  a basket formed of a plurality of square pipes having neutron absorbing capability, where the basket has a cross section which has angles, and the basket is for housing spent fuel assemblies in each square pipe; and  a cavity for inserting the basket, where the inner shape of the cavity is in accordance with the outer shape of the basket. 9. A cask comprising: a neutron shield comprising a two-part reactive cold-setting epoxy resin produced by combining  a main component of an aliphatic glycidyl ether epoxy resin, and  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct,  a refractory comprising at least one of aluminum hydroxide and magnesium hydroxide, and  a neutron absorbing material, where  the neutron shield is disposed on the outer circumference of the cask;  a shell main body which can shield gamma-rays;  a basket formed of a plurality of square pipes having neutron absorbing capability, where the basket has a cross section which has angles, and the basket is for housing spent fuel assemblies in each square pipe; and  a cavity for inserting the basket, where the inner shape of the cavity is in accordance with the outer shape of the basket. 10. A method of making a neutron shield, the method comprising curing a mixture of  an aliphatic glycidyl ether epoxy resin, and  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct; and  producing the neutron shield of  claim 1 .  claim 1 11. A method of making a neutron shield, the method comprising curing a mixture of  an aliphatic glycidyl ether epoxy resin,  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct;  a refractory comprising at least one of aluminum hydroxide and magnesium hydroxide; and  a neutron absorbing material, and  producing the neutron shield of  claim 5 .  claim 5 12. A method of making a cask, the method comprising forming a neutron shield by curing a mixture of  an aliphatic glycidyl ether epoxy resin; and  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct, and  using the neutron shield to produce the cask of  claim 8 .  claim 8 13. A method of making a cask, the method comprising forming a neutron shield by curing a mixture of  an aliphatic glycidyl ether epoxy resin;  a hardener comprising at least one of an alicyclic polyamine, a polyamide polyamine, an aliphatic polyamine and an epoxy adduct;  a refractory comprising at least one of aluminum hydroxide and magnesium hydroxide; and  a neutron absorbing material, and  using the neutron shield to produce the cask of  claim 9 . claim 9