Radio-protective shield

A radio-protective shield intended to be fastened on the periphery of an opening formed in a wall separating a space subjected to ionising radiations, named hot space, and a space not subjected to ionising radiations, named cold space, which radio-protective shield comprises a wall made of a transparent material, said wall made of a transparent material comprising a first face intended to be directed on said cold space side, and a second face intended to be directed on said hot space side,

• a peripheral edge of one of said first face or second face of said wall made of a transparent material bearing against a bearing face of a counter-frame through a seal, said radio-protective shield comprising a fastening frame provided with means for bearing against a peripheral edge of the other one of said first face or second face of said wall made of a transparent material,
• which bearing means comprise a longitudinal bearing structure comprising a contact surface with the peripheral edge of the first face or of the second face opposite said wall made of a transparent material,
• which radio-protective shield also comprises securing means for securing together said counter-frame and said fastening frame,
• wherein said bearing means comprise elastic return means adapted to apply a pressure against said longitudinal bearing structure in the direction of said wall made of a transparent material.