초록 ▼

Device for checking the tightness of covers on a heavy metal container for transport and/or storage of radioactive materials, the said container comprising a cavity for nuclear materials delimited by a thick cylindrical shell closed at one end by means of a bottom fixed so that it is leaktight, and

Device for checking the tightness of covers on a heavy metal container for transport and/or storage of radioactive materials, the said container comprising a cavity for nuclear materials delimited by a thick cylindrical shell closed at one end by means of a bottom fixed so that it is leaktight, and at the other end by at least two thick removable superposed covers, characterized in that the said covers are in contact with a shoulder formed in the shell, through flanges fitted with at least two concentric seals, that at least two ducts pass through the shell at each cover, leading through a first inspection orifice to the outside surface of the shell close to the cover in an accessible location, and through a second orifice, one into the space between the cover concentric seals, and the other into the space between the said cover, the shell and the immediately superposed cover, each inspection orifice optionally being connected to a tightness measurement and inspection circuit.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.]1. 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 removab

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.]1. 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.