Patent ID: 6765221
Filing Date: 2004-07-20
Classification: A63H,G21F

Abstract:
A method of shipping substantially pure uranium hexafluoride in a conventional overpack comprising the steps of:providing a cylinder for the transport of substantially pure uranium hexafluoride comprising a vessel having a cylindrical sidewall and a head closing one end of the vessel, the head being permanently affixed to the sidewall a valve connected to the head of the vessel controlling the flow of matter into and out of the vessel, a sealing surface connected to the vessel and surrounding the valve, a cap over the valve, a pair of seals between the sealing surface and the cap and defining a test volume between the two seals, the cap and the sealing surface, a test port connecting the test volume and an exterior surface of the vessel, fastening means for pressing the cap against the sealing surface to seal a joint between them against the flow of matter from outside the cap to the valve and from the valve to outside the cap, determining a maximum rate of leakage from within the cap to the atmosphere outside the cap by measuring the leakage rate into the test volume with a leak testing apparatus connected to the test port, and thereafter placing the cylinder in a conventional overpack.