Method and apparatus for shipping substantially pure uranium hexafluoride
US6765221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Feb 5, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H3/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Substantially pure uranium hexafluoride is shipped in a conventional overpack. A cylinder includes a vessel with a cylindrical sidewall A head permanently affixed to the sidewall closes one end of the vessel. A valve controls the flow of matter into and out of the vessel. A sealing surface connected to the vessel surrounds the valve. A cap covers the valve and a pair of seals is located between the sealing surface and the cap. The volume between the two seals, the cap and the sealing surface defines a test volume. A test port connects the test volume and an exterior surface of the vessel, and fasteners press the cap against the sealing surface. A maximum rate of leakage from within the cap to the atmosphere outside the cap is determined by measuring the leakage rate into the test volume with a leak testing apparatus connected to the test port. Thereafter the cylinder is placed in a conventional overpack. The maximum leakage rate is determined using a test apparatus consisting essentially of a vacuum pump, a pressure gauge, a container of known volume, a valve to control the flow of air from the atmosphere into the container which are all adapted to be connected to the test port at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.