A new recycle process of uranium from spent fuel by selective sulfurization

Nobuaki Sato, Genki Shinohara, Osamu Tochiyama, Soichi Sato

研究成果: Paper査読

抄録

For the recovery of uranium from spent nuclear fuel, sulfide reprocessing process, which consists of voloxidation, selective sulfurization, and magnetic separation or selective dissolution steps, are proposed. In this paper selective sulfurization of rare-earth oxides in the presence of uranium oxides was studied by thermogravimetry and X-ray diffractometry. In case of the mixture with UO2, the rare earth oxides R2O3 (R=Nd, Eu, etc.) were preferentially sulfurized by CS2 forming oxysulfides and sulfides, while UO2 remained at temperatures lower than 500°C. When R2O3 was mixed with U 3O8, first, the reduction of U3O8 to UO2 occurred at low temperatures followed by the sulfurization of R2O3. The separation of rare earth elements from UO 2 in suspension solution by the use of permanent magnet was examined. The advantage of the proposed process was also discussed by compared with current process.

本文言語English
ページ973-977
ページ数5
出版ステータスPublished - 2006 10月 6
イベント2006 TMS Annual Meeting - San Antonio, TX, United States
継続期間: 2006 3月 122006 3月 16

Other

Other2006 TMS Annual Meeting
国/地域United States
CitySan Antonio, TX
Period06/3/1206/3/16

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金

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