| Popis: |
Out-of-reactor tritium release from well-characterized solidified melt particles of lithium oxide is investigated for dependence on temperature, sweep gas flow rate, effect of hydrogen addition to the processing gas, and particle size. Solid-phase diffusion, characterized by diffusion coefficient in D(cm2/s) = −(13.2 ± 3.7) − (27.6 ± 12 kJ/mol)/RT, is shown to control long-term escape for temperatures 673 K – 923 K. Admixture of 2.4 vol. % H2 to the sweep stream appears to promote initial tritium release. |
