A capillary reservoir method was used to study diffusion in eutectic melts, with 213U as a tracer and with U concentrations of 1wt% (table 97). The data for UO2Cl2, at temperatures ranging from 392 to 527C, could be described by:

D (cm2/s) = 1.76 x 10-3 exp[-7.5(kcal/mol)/RT]

E.Geldner, O.Knacke, F.Müller: Zeitschrift für Anorganische und Allgemeine Chemie, 1970, 372[1], 14-20

Table 97

Diffusion of UO2Cl2 in Eutectic KCl-LiCl Melts