Neutron shield and cask that uses the neutron shield
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKiyoshi Nihei, Kenji Najima
Life of this patent
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Abstract
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 polyamine, 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.
Claims13
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 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.
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.
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.
Dependencies are inferred from the claim text.