Device and method for permanently controlling the tightness of closing lids of containers for radioactive materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 1, 2001
Grant Date -
N/A
app pub date -
Feb 23, 2000
filing date -
Jul 24, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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