Plastic and nonmetallic article shaping or treating: processes – Shaping or treating radioactive material
Patent
1994-03-31
1995-06-06
Harvey, Behrend E.
Plastic and nonmetallic article shaping or treating: processes
Shaping or treating radioactive material
252635, 376411, G21C 302, G21C 2100
Patent
active
054220475
ABSTRACT:
Provided is a method for making high-temperature high-performance fuel particles wherein fertile or fissile metal carbides are dispersed in spherical graphite skeletons. That is, a fissile metal salt, such as uranyl nitrate, is added to an aqua-mesophase in alkaline solution, to form a fuel solution. The fuel solution is added to an oil bath to form an emulsion of aqueous pitch-derrived spheres in oil. The emulsion is heated and stirred to drive water from the spheres to dry them into solid spheres which contain the above metal salts. The solid spheres are then heated to between 700-1100 C. to carbonize them and convert the metal salts to metal oxides and then the spheres are further heated to between 2000.degree.-3000.degree. C., to carburize the metal oxides to metal carbides and graphitize the carbon. The resulting fuel spheres are then preferably coated by deposition thereon, of a carbon or carbide coating to contain the future reaction products thereof. The invention includes the above spherical graphite nuclear fuel particles and the method for preparing same.
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Collier Stanton E.
Harvey Behrend E.
Stover Thomas C.
The United States of America as represented by the Secretary of
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