Measurement of separative characteristics of H2-HT isotope separation using thermal diffusion column.

Estimation of Hot Wire Temperature of Thermal Diffusion Column by the Pressure Change after Turning on Electricity

“…Some axisymmetric two-dimensional analysesC 2 )-( 4 ) were performed for experiments using a hot-wire thermal diffusion column separating isotope gas mixture such as argon< 5 ) and hydrogen< 6 ). The analyses predicted well the experimental results in the lower temperature range of the hot wire, but analytical results of separative power in the higher temperature range of the hot wire were always larger than experimental ones< 5 H 6 ).…”

“…The first term attributes to the joule's heat by electric power, the second term and the third term heat dissipation by radiation and heat conduction. In the previous analyses< 5 ) ( 6 ), the heat dissipation by radiation, that is, the second term in Eq. (A3) was assumed to be zero.…”

“…Because a magnitude of radiation increases proportionally to the fourth power of the absolute temperature, the effect of radiation on the temperature of the hot wire becomes larger in the higher temperature range. The previous studies< 5 ) ( 6 ), however, did not consider heat transport by radiation. The estimation of the temperature of the hot wire of the thermal diffusion column needs to incorporate the heat transport by radiation.…”

Effect of Operational Pressure on Periodic Oscillation of Secondary Circulation near the Bottom of the Thermal Diffusion Column.

“…A system composed of the thermal diffusion column can be applied to the purification processes of tritium in production and recovery systems for the gas mixture of hydrogen isotopes in the fusion fuel cycle. The axisymmetric two-dimensional analyses were made with separation experiment of isotope gas mixture to analyze the separative characteristics of the thermal diffusion column< 2 l- ( 5 ). Moreover, remarkable enhancement of separation factor was found out by using a thermal diffusion column with a cryogenic-wall cooled by liquid nitrogen instead of water at room tempcrature( 6 ) ( 7 ).…”