(IT/P1-28) Studies On The Characteristic Of Titanium-Tritium Reaction

G. Huang1), X. H. Cao1), X. G. Long1), B. F. Yang1), W. K. Liu1)
1) Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, China

Abstract.  The p-c-T curves and the relation between equilibrium pressure and temperature of tritium absorption and desorption in Ti are measured in the centigrade temperatures of 250, 500, 525 and 550. Equilibrium pressures of the absorption and desorption at different temperature of Titanium are given and then the thermodynamics parameters and the tritium absorption capacity are determined according to Van't Hoff equation. There are different changes of enthalpy and entropy when titanium changing to different phases. The change of enthalpy in the first and second plateau are - 101.5 kJ mol-1 and - 179.6 kJ mol-1 respectively and the change of entropy in the first and second plateau are - 165.3 J K-1 mol-1 and - 290.3 J K-1 mol-1 respectively. The lagging effect is not found when titanium desorbing tritium. P-t curves of titanium tritiation were investigated at the centigrade temperatures of 550 to 750 by using the method of the reaction rate analysis in a constant volume system. The rate constants of titanium tritiation reaction are determined and the activation energy value obtained by this analysis is 155.5 kJ mol-1. Desorption P-t curves of titanium tritide were investigated at centigrade temperatures of 350 to 550.The desorbing rate constants of titanium tritide at different temperatures are determined and the activation energy of desorbing is 62.1 kJ mol-1.

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