Numerical Solution of Argon 36-38-40 Concentration Profiles within Thermal Diffusion Column.

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  • KOBAYASHI Noboru
    Department of Nuclear Engineering, Faculty of Engineering, Nagoya University
  • SHIBATA Atsuhiro
    Department of Nuclear Engineering, Faculty of Engineering, Nagoya University Tokai Works, Power Reactor and Nuclear Fuel Development Corp.
  • YAMAMOTO Ichiro
    Department of Nuclear Engineering, Faculty of Engineering, Nagoya University

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  • Numerical Solution of Argon 36-38-40 Co

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Abstract

Axisymmetric concentration profiles of 3-component isotope separating thermal diffusion column with continuous feed and draw-offs were calculated by solving the convection-diffusion equations using Newton iterative method, where the flow variables were specified as input. An approximate expression of thermal diffusion coefficient in multi-component mixture in terms of binary thermal diffusion factors and binary diffusion coefficients was used for the analyses.<BR>Analytical results were compared with experimental data of 3-component natural abundance argon 36-38-40 isotopes separated in a 950 mm-height, inner 15 mmφ tube column with a 0.3 mmφ hot wire in the axis. Validity of the analyses and the approximation in the thermal diffusion coefficient was ensured by close agreement with experimental results.

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