Nukem Technologies Gmbh

Tsinghua University

Yaping Tang

Jie Zhang

Bing Liu

Zuoyi Zhang

Martin Kadner

Georg Braehler

Werner Heit

Karl Froschauer

Guo Wenli

Liang Tonxiang

Tang Chunhe

Youlin Shao

Rongzheng Liu

Malin Liu

Junguo Zhu

Xiangwen Zhou

Chunhe Tang

Zhenming Lu

A method for the production of spherical combustible or fertile material particles from an oxide of the group of the heavy metals uranium, plutonium, or mixtures thereof. For this purpose, the process steps of producing a base solution of the nitrates of the heavy metal(s), adding at least one first reagent in order to adjust the viscosity of the solution, dropping the solution to form microspheres, at least superficially solidifying the microspheres in an atmosphere containing ammonia, collecting the microspheres in a solution containing ammonia, and subsequent washing, drying and thermal treatment are carried out, where at least one of urea, ammonium carbonate, ammonium hydrogen carbonate, ammonium cyanate, and biuret are added to the base solution before adding the first reagent. The solution thus prepared is heated to a temperature T where 80&#xb0; C.&#x2266;T&#x3c;Tand where T=boiling temperature of the solution, and is maintained at the temperature over a time period t where 2 h&#x2266;t&#x2266;8 h.

Method for the production of spherical combustible or fertile material particles

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Beijing, China

Yaping Tang