Rack apparatus for storing and / or transporting a plurality of nuclear fuel assemblies, including a plurality of stages with differentiated functions

摘要

The present invention relates to a rack apparatus for transporting and / or storing nuclear fuel assemblies. The rack apparatus includes a plurality of first stages (Ei-1, Ei + 1) for neutron absorption and heat conduction, and a plurality of first stages for mechanical strength arranged alternately with the plurality of first stages. Two stages (E2i) are provided. Each of the plurality of first stages (Ei-1, Ei + 1) is made of an aluminum alloy containing boron and includes first and second assemblies having cross notches (6a, 6b). Each of the plurality of second stages (Ei) includes first and second structures (7a, 7b) that are stacked in the stacking direction (8) and are made of one or more materials that do not contain a neutron absorbing element. The structure (7a, 7b) has no notch on the opposite edge in the stacking direction (8).