초록 ▼

A cask for the dry containment of radioactive fuel elements. The cask has a cover which contains valved drain and purge passageways. These passageways are sealed by after purge cover seals which are clamped over them and to the outer surface of the cover. The cover seals are tested by providing them

A cask for the dry containment of radioactive fuel elements. The cask has a cover which contains valved drain and purge passageways. These passageways are sealed by after purge cover seals which are clamped over them and to the outer surface of the cover. The cover seals are tested by providing them with a pair of concentric ring seal elements squeezed between the cover seal and the outer surface of the cover and by forcing a gas under pressure into the annular region between the seal element.

대표청구항 ▼

A shipping container for dry containment of radioactive materials, said container comprising a cannister-like body open at one end for receiving radioactive materials to be shipped, a radiation absorbing material supported by said body to surround the interior thereof, a removeable cover shaped to f

A shipping container for dry containment of radioactive materials, said container comprising a cannister-like body open at one end for receiving radioactive materials to be shipped, a radiation absorbing material supported by said body to surround the interior thereof, a removeable cover shaped to fit over and close said one end of said body and to form a annular seal therewith, means for clamping said cover to said body at said one end to form a gas tight vessel for containing said radioactive materials, a fluid purging system for controlling the atmospheric conditions inside said vessel, said fluid purging system including fluid passageway means extending into said vessel and communicating between the interior and exterior thereof, a fluid flow control valve arranged along said passageway at the exterior of said vessel, and an after purge seal cap means comprising a cover seal extending over said valve and clamped to said vessel and a circumferential fluid tight seal surrounding said passageway and clamped between said cap and said vessel.