The invention relates to a container (1) intended for transport/storage of radioactive materials, the container comprising a container body (2) and at least one handling device (8) mounted using attachment screws (38) in a base housing (30) delimited by a base housing wall (32). According to the invention, a sealing plate (50) covering the attachment screws is installed removably in a plate housing (52) delimited by a plate housing wall (56) provided on the handling device and by a portion (58) ...

The invention relates to a material for neutron shielding and for maintaining sub-criticality, and a process for preparation of this material and applications of the said material.The material comprises a matrix based on a vinylester resin, at least one polyamide and an inorganic filler capable of slowing and absorbing neutrons.Applications: manufacturing of neutron shields in packagings for transport, interim storage and/or ultimate storage of radioactive materials, particularly packagings for ...

This invention relates to a composite material for neutron shielding and maintenance of sub-criticality comprising a matrix based on vinylester resin and an inorganic filler capable of slowing and absorbing neutrons.The vinylester resin may be an epoxymethacrylate resin and the inorganic filler may contain a zinc borate and an alumina hydrate or magnesium hydroxide.

The invention concerns a neutron shielding material for maintaining sub-criticality based on unsaturated polymer: Said material comprises an unsaturated polyester resin, at least an inorganic boron compound, and at least a hydrogenated inorganic compound, in amounts such that the boron concentration is 4.10.sup.21 to 25.10.sup.21 atoms per cm.sup.3 and the hydrogen concentration is 3.10.sup.22 to 5.5.10.sup.22 atoms per cm.sup.3.

The invention relates to a shielding wall (12) with a puncture-resistant shield for a container (1), said wall (12) comprising support means (20) as well as the following respective stacked elements (24, 26, 28, 30, 32): an outer plate (24); a first dampening layer (26); an intermediate plate (28); a second dampening layer (30); an inner plate (32). According to the invention, the intermediate plate (28) is positioned non-rigidly with respect to the support means (20). The invention likewise rel...