Preparation and identification of U(IV) for the investigation of behaviors of uranium in a disposal repository

처분장에서 우라늄 거동 규명을 위한 U(IV)의 제조 및 확인

  • Received : 2008.02.18
  • Accepted : 2008.04.04
  • Published : 2008.04.25

Abstract

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).

Acknowledgement

Supported by : 과학기술부

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