Patent ID: 6223587
Filing Date: 2001-05-01
Classification: G21F

Abstract:
A container cover tightness checking apparatus, comprising:a cylindrical shell, delimiting a cavity for nuclear materials, closed at a bottom end by a fixed leaktight bottom; andat least two removable superposed top end shell covers, the shell covers in contact with a shoulder formed in the shell through flanges fitted with at least two concentric seals,each of the at least two shell covers provided with at least a first duct and a second duct,the first duct leading through a first inspection orifice to an outside surface of the shell close to the shell cover in an accessible location, the first duct further leading into a space between the concentric seals, andthe second duct leading through a second inspection orifice to the outside surface of the shell close to the shell cover in an accessible location, the second duct further leading into a space between the cover, the shell, and an immediately superposed cover.