NEUTRON SHIELDING MATERIAL, MANUFACTURING METHOD THEREFOR, STORAGE RACK FOR SPENT NUCLEAR FUEL, AND TRANSPORT CASK

摘要

PROBLEM TO BE SOLVED: To provide a neutron shielding material which suppresses gas generation and the occurence of swelling and which is excellent in neutron absorption capacity even while being used under water.SOLUTION: A neutron shielding material 10 is constituted by a base member 11 having the composition of a B-Al alloy, a cladding material 12 which has the composition of an Al alloy except for the B-Al alloy or an Al single body and which clads the base member 11, and an oxide film 13 provided on a surface of the cladding material.