Method and device for pulling out blocking sleeves from guide tubes of separable nuclear reactor fuel rod bundles.

摘要

Folding towards the interior is employed to deform each one of the zones of the ferrule (25) comprising a deformed portion (29) projecting radially, in such a manner as to extract the deformed portion (29) from a corresponding cavity (22) of the connector. The locking sleeve (20) is then extracted by traction on this sleeve (20) in the axial direction (ZZ') of the guide tube (4). Preferably, the ferrule (25) is composed of cylindrical sectors separated by slits disposed along generatrices of the ferrule (25). A tooling (31) permits the performance of the folding of the sectors of the ferrule (25) and the pinching of these sectors to carry out the extraction of the locking sleeve (20). The extraction is carried out under water in a well for storing the fuel. …IMAGE…