Tritium bonded to electrophilic atoms like O, S, N or halogens can spontaneously exchange places with hydrogen from the water. These tritium species are exchanged even at a very low temperature and have the generic name `labile'. In this paper, a new facility for the removal and quantitative determination of labile tritium is shown. The working principle is as follows: tritium sources are brought in contact with protic solvent, leading to a spontaneous exchange of labile tritium, then the obtained tritiated solvent is extracted by distillation. The new facility was tested for removal efficiency of labile tritium from labeled compounds and wastes with different compositions.
The one-dimensional numerical model of the proton conductivity in anhydrous solids is used to obtain the conductivity for different values of proton concentration. The model is constructed as a chain of rods or triangles, depending on the symmetry of molecules, linked by hydrogen bonds. An evolution of such system governed by the Grotthuss mechanism is described by means of the kinetic Monte Carlo method. It is shown that in the case of a system with molecules represented by triangles, a decrease in the conductivity corresponds to a significantly broader range of concentrations than is the case for a system constructed by means of rods. This result may prove to be of a potential importance in the case of possible electronic applications. Moreover, for the discussed systems, a strong dependence on the defect formation energies is demonstrated.
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