2008, Volume 10, Issue 5
Strategic Study of CAE >> 2008, Volume 10, Issue 5
Thermodynamic study for the separation of tritium by CECE method from heavy water
1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
2. China Academy of Engineering Physics, Mianyang 621900, China
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Abstract
The present work makes a contribution to thermodynamic study for the separation of tritium by CECE method from D2-heavy water involving tritium.The reversible decomposition voltages of H2O,HDO,D2O,DTO and T2O have been calculated and the difference of decomposition voltage for H2O andT2O is 0.047 V. Therefore,the electrolytic volt of heavy water must be less 0.047 V than that of H2O. The functional relations of vapor pressure and vaporization heat with temperature from 0~100 ℃ for these five kinds of hydrogen-isotope water are derived. The equilibrium constants for reaction (19-1) and reaction (19-2) are also evaluated and both are quite small. Therefore,it is impossible to realize the two reactions in static system,however,it is possible to realize them in flow system. The most disadvantage for CECE method is the rather poor selectivity,the exploration is try to under way.
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