Leaktight closure apparatus for multi-use containment unit for irradiated nuclear fuel assemblies or high-activity waste
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United States of America Patent
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May 2, 2000
Grant Date -
N/A
app pub date -
Apr 14, 1998
filing date -
May 6, 1997
priority date (Note) -
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Abstract
A sealable metal multipurpose canister for confining irradiated nuclear fuel assemblies and a sealing means therefor. The canister includes a tubular or cylindrical body having a vertical major axis and vertical wall, a lower end closed by a welded base and an open and sealable upper end having a vertical inner wall section including a transverse shoulder extending over at least a portion of the vertical inner wall. The sealing means includes a first solid metal sealing disk supported by the transverse shoulder and having a peripheral portion cooperating sealingly with the vertical inner wall, a second solid metal sealing disk resting on and above the first sealing disk and having a peripheral portion cooperating sealingly with the vertical inner wall and a gripping means located inside the upper end above the second sealing disk, and acting on the first and second sealing disks to create a leaktight seal.
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