This product is mainly used in the internal grille and protective enclosure of nuclear reactors to capture thermal neutrons generated by nuclear fission in the reactor. Prevent thermal neutron spillage and protect the safety of personnel and equipment outside the reactor. The traditional shell materials mostly use aluminum and aluminum alloy, magnesium alloy, zirconium alloy and other materials, the toughness of the product is higher, the safety factor is higher, not only reduces the cost of materials, but also uses a higher safety factor for peripheral equipment and personnel.