Packaging for the transport and/or storage of radioactive materials, permitting easier production and improved heat conductivity

A package (1) for the transport and/or storage of radioactive materials, the package comprising a package side body (10) extending about a central longitudinal axis (2) and partly delimiting a housing (12) for the radioactive materials, the package also comprising, being arranged around the package side body, an external radiation protection shell (14) made of a plurality of unitary annular structures (16), stacked on each other along the central longitudinal axis (2) and arranged around the package side body (10),

• each unitary annular structure (16) comprises:
• an outer annular wall (24);
• an inner annular wall (26);
• a radial heat conduction wall (22) having an external end integral with the outer annular wall (24), as well as an internal end in contact with the package side body (10) and integral with the inner annular wall (26) itself in contact with the package side body (10);
• and in that two unitary annular structures (16) directly consecutive in the stack at least partly delimit an annular cavity (30) housing at least one radiation protection element (32), said cavity being radially closed outwards by the outer annular wall (24) of one or both of the two directly consecutive unitary annular structures, radially closed inwards by the inner annular wall (26) of one or both of the two directly consecutive unitary annular structures, and axially closed on either side by the radial heat conduction wall (22) of one and the other of said two directly consecutive unitary annular structures (16) respectively.