Fray Symposium - Recovery of nuclear materials and rare-earths by sulfide method
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2011-Sustainable Industrial Processing Summit
SIPS2011 Volume 1: Sustainable Non-ferrous Smelting in 21st Century

Editors:Florian K
Publisher:Flogen Star OUTREACH
Publication Year:2012
Pages:828 pages
ISBN:978-0-9879917-0-6
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)

    Recovery of nuclear materials and rare-earths by sulfide method

    Akiichi Kigoshi1; Nobuaki Sato1; Akira Kirishima1;
    1TOHOKU UNIVERSITY, Sendai, Japan;
    Type of Paper: Regular
    Id Paper: 499
    Topic: 4

    Abstract:

    Recovery of nuclear materials and rare-earths from spent nuclear fuel was examined by sulfide process consisted of sulfurization and acid leaching steps using the simulated fuel oxides. After the oxidation of UO2 pellet to U3O8 powder by voloxidation treatment, rare-earth in the sample were reacted with CS2 at c.a. 673 K forming oxy-sulfides or sulfides, while uranium oxides remained without sulfurization. Then oxysulfides and sulfides were separated by dissolution into nitric acid and nuclear materials such as uranium and plutonium were recovered as oxides. The conditions for selective sulfurization were also discussed.

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    Cite this article as:

    Kigoshi A, Sato N, Kirishima A. Recovery of nuclear materials and rare-earths by sulfide method. In: Florian K, editors. Sustainable Industrial Processing Summit SIPS2011 Volume 1: Sustainable Non-ferrous Smelting in 21st Century. Volume 1. Montreal(Canada): FLOGEN Star Outreach;2012. p..