The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 2008
Filed:
Apr. 04, 2005
Ippei Amamoto, Higashi-Ibaraki-gun, JP;
Koji Sato, Higashi-Ibaraki-gun, JP;
Ippei Amamoto, Higashi-Ibaraki-gun, JP;
Koji Sato, Higashi-Ibaraki-gun, JP;
Japan Nuclear Cycle Development Institute, Ibaraki-Ken, JP;
Abstract
Fluorine or a fluorine compound is subjected to a reaction with a spent oxide fuel to produce fluorides of uranium and plutonium, and recovering the fluorides using a difference in volatility behavior. The method includes steps of: subjecting a mixture of UOand PuOwith hydrogen fluoride mixed with hydrogen to HF-fluorinate uranium and plutonium into UFand PuF; subjecting UFand PuFwith a fluorine gas to F-fluorinate uranium and plutonium into UFand PuF; and fractionating UFand PuFusing a difference in phase change of obtained UFand PuF, removing a part of UF, and volatilizing the remaining UFand PuFat the same time. By such a reprocessing method, PuFhard to undergo a reaction is prevented from being formed as an intermediate fluoride, the material of a reactor is hard to be corroded, and a consumption of expensive fluorine gas is reduced.