Abstract: A composite material for neutron shielding and for maintaining subcriticality obtained from a formulation including: 100 portions by weight of a composition including, the weight percentages being based on the total weight of the composition: from 30% by weight to 45% by weight of a thermosetting resin selected from a polyester resin and a vinylester resin, from 23% by weight to 58% by weight of an inorganic filler, the inorganic filler including at least one hydrogenated compound and at least one boron compound, and from 12% by weight to 32% by weight of a polyolefin or of an olefin copolymer; from 0.3 portion by weight to 1.4 portion by weight of a polymerisation initiator; and from 0.3 portion by weight to 1.4 portion by weight of a polymerisation accelerator. A manufacturing method to use this composite material.

Abstract: The invention relates to a package (2) for the transport and/or storage of radioactive materials, including a lateral body (10) which defines a cavity (6) for housing radioactive materials which extends along a longitudinal axis (8), where the body (10) includes an interior wall (22) together with an exterior wall (22) which between them define a space (14) which extends around said longitudinal axis (8), where said space houses means of radiological protection (18) as well as means of thermal conduction (16). According to the invention, the means of thermal conduction includes multiple thermal conduction elements (31) each defining internally a void which extends lengthways in a direction of conduction (36) which runs from the interior wall (20) towards the exterior wall (22).

Abstract: The invention relates to a device (1) for transporting and/or storing radioactive materials (10), comprising a closed enclosure (8) and a system (12, 16) for securing said closed enclosure, said system comprising catalytic means (12) for recombining hydrogen and oxygen into water, placed in said closed enclosure. According to the invention, the system for securing said closed enclosure further comprises a device (16) for the controlled release of oxygen in said closed enclosure (8).

Abstract: The invention relates to a device (1) for transporting and/or storing radioactive materials (10), comprising a closed enclosure (8) and a system (12, 16) for securing said closed enclosure, said system comprising catalytic means (12) for recombining hydrogen and oxygen into water, placed in said closed enclosure. According to the invention, the system for securing said closed enclosure further comprises a device (16) for the controlled release of oxygen in said closed enclosure (8).

Abstract: Methods and devices for removing inflammable gases produced by radiolysis in a closed chamber containing radioactive matters comprising organic compounds and possibly water, or radioactive matters in the presence of organic compounds and possibly water. Inside the chamber there may be placed a catalyst of at least one reaction for oxidizing the inflammable gases by oxygen contained in the chamber atmosphere, supported by an inert solid support; a catalyst of at least the reaction for oxidizing CO to CO2; possibly an oxygen source; and possibly a hygroscopic microporous inert solid support. Also, chambers for radioactive matters containing such devices.

Abstract: Methods and devices for removing inflammable gases produced by radiolysis in a closed chamber containing radioactive matters comprising organic compounds and possibly water, or radioactive matters in the presence of organic compounds and possibly water. Inside the chamber there may be placed a catalyst of at least one reaction for oxidizing the inflammable gases by oxygen contained in the chamber atmosphere, supported by an inert solid support; a catalyst of at least the reaction for oxidizing CO to CO2; possibly an oxygen source; and possibly a hygroscopic microporous inert solid support. Also, chambers for radioactive matters containing such devices.