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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Imprimir: 1093-3611
ISSN On-line: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v7.i4.40
pages 475-485

APPLICATION OF REACTIVE PLASMA TO NUCLEAR WASTE TREATMENT - POSSIBILITY OF SEPARATION PROCESS OF ZR-NB ALLOY BY REACTIVE THERMAL PLASMA TREATMENT

Masaaki Suzuki
Department of Chemical Engineering, Tokyo Institute of Technology 2-12-1 0-okayama, Meguro-ku, Tokyo 152-8552, Japan
Takeshi Ichihashi
Department of Chemical Engineering, Tokyo Institute of Technology 2-12-1 0-okayama, Meguro-ku, Tokyo 152-8552, Japan
Arata Jote
Department of Chemical Engineering, Tokyo Institute of Technology 2-12-1 0-okayama, Meguro-ku, Tokyo 152-8552, Japan
Shigeru Nishio
The Wakasa Wan Energy Research Center 64-52-1, Hase, Tsuruga-shi, Hukui 914-0192, Japan
Shinji Kawagoe
Fugen Nuclear Power Station, Japan Nuclear Cycle Development Institute 3 Myojin-cho, Tsuruga-shi, Hukui 914-8510, Japan

RESUMO

Applications of thermal plasmas in the nuclear engineering field are reviewed, and as an application example of a reactive thermal plasma treatment, the possibility of separation of zirconium-niobium alloy is reported. Some experiments, which use a thermal fluorine plasma have been carried out and the following results have been obtained. When the process takes place above the melting point of this alloy, Zr is extracted successfully in the evaporated fine particles and Nb is enriched in the bulk alloy. This phenomenon can be explained well by using Gibbs free energy of fluorine reactions. For a better separation, a higher temperature of the sample and a more effective mass transfer of Nb in the melting alloy is required. The results confirm the possibility of this separation method.