Abstract: An assembly for transporting uranium hexafluoride, includes: a sealed inner container, defining a first containment shell intended to be loaded with uranium hexafluoride and having a general cylindrical shape of circular cross-section, the first containment shell being delimited by a lateral wall extending about a longitudinal central axis of the inner container, as well as by two opposite axial end walls crossed by the longitudinal central axis, at least one of the two opposite axial end walls of the sealed inner container being equipped with a uranium hexafluoride filling valve; a sealed outer container delimiting a second containment shell in which the inner container is housed in an extractable manner; and two shock absorber caps removably fastened on respectively two opposite axial ends of the outer container.

Abstract: The invention relates to a storage device for storing and/or transporting nuclear fuel assemblies, which includes recesses (2) defined by separating partitions (9) defining first and second recesses (2), the partition comprising: two first walls (22) defining the first and second recesses and made of an aluminium-alloy material which is free of neutron-absorbing elements, and defining therebetween a first inter-wall space (28); two second walls (30) arranged in the first space (28) and made of a material which comprises neutron-absorbing elements, the distance between the inner (36) and outer (34) surfaces of each second wall (30) defining a thickness (e2), and a distance (E) being defined between the outer surface (34) of each second wall and a median partition plane (20), the values meeting the condition 0.1?e2/E?0.43.