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KMID : 0385520080210020143
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Analytical Science & Technology
2008 Volume.21 No. 2 p.143 ~ p.147
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Preparation and identification of U(Ⅳ) for the investigation of behaviors of uranium in a disposal repository
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Kim Seung-Soo
Kang Kwang-Chul
Kim Jung-Suck
Jung Euo-Chang
Baik Min-Hoon
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Abstract
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U(Ⅳ) ion, the valance state of uranium presumed at in a deep-depth disposal of a spent fuel, was prepared and separated from U(Ⅵ) ion. In order to prepare U(Ⅳ) ion, tests were performed by adding several reducing agents into a uranyl solution or by dissolution of uranium oxide in a mixed acid added with a reducing agent. The valance states of the uranium in the prepared solutions were identified by separating two ions with a Dowex AG 50W-X8 cation exchange resins and measuring the solutions using a laser-induced fluorescence spectroscopy. However, U(Ⅳ) and U(Ⅵ) were not separated by a Lichroprep Si60 exchange resin in the same separation condition of Pu(Ⅳ) and Pu(Ⅵ).
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KEYWORD
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uranium valance, separation, spectroscopy, chromatography
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