Numerical Modeling for Coextraction of Tc(VII) with U(VI) by n-Octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine Oxide from Nitric Acid Solution.

DOI 9 References
  • TAKEUCHI Mitsuo
    Nuclear Engineering Research Laboratory, The University of Tokyo
  • TANAKA Satoru
    Nuclear Engineering Research Laboratory, The University of Tokyo
  • YAMAWAKI Michio
    Nuclear Engineering Research Laboratory, The University of Tokyo
  • TACHIMORI Shoichi
    Department of Fuel Cycle Safety Research, Japan Atomic Energy Research Institute

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Abstract

The coextraction model of Tc(VII) and U(VI) from nitric acid solution was developed on a tributyl phosphate (TBP)/n-dodecane system involving n-octyl(pheny1)-N, N-diisobutylcarbamoyl-methylphosphine oxide (CMPO). Technetium was considered to be extracted by the formation of Tc-CMPO and U-Tc-CMPO complexes in the presence of uranium. The distribution coefficient of technetium in the presence of uranium was defined by taking these complexes into account, and expressed as a function of nitric acid concentration, free CMPO concentration, and distribution coefficient of uranium. The equation of the distribution coefficient derived was applied to the previous data obtained in the mixed system of CMPO-TBP-dodecane at the low nitric acid concentration. It was found that the distribution behavior of technetium in the presence of uranium could be successfully simulated by the present coextraction model.

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Details 詳細情報について

  • CRID
    1390282679071003648
  • NII Article ID
    10002072580
  • NII Book ID
    AA00703720
  • DOI
    10.3327/jnst.32.450
  • COI
    1:CAS:528:DyaK2MXms1aitbY%3D
  • ISSN
    18811248
    00223131
  • Text Lang
    en
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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