Evaluation and mitigation of tritium memory in detritiation dryers

Estimation of tritium inventory in exhaust detritiation system for fusion test device in the initial tritium recovery operation

“…Thus, there would be virtually no tritium inventory in the polymer membrane. On the other hand, the molecular sieve used in the MS system would be a part of the tritium inventory due to the presence of residual water in the molecular sieve after the regeneration operation [15][16][17][18]. Based on the regeneration operating conditions of molecular sieves [7], the amount of residual water in molecular sieves is estimated to be several kilograms.…”

Evaluation of Hydrogen Isotope Exchange Methodology on Adsorbents for Tritium Removal

“…A study that evaluated the tritium retention of 5A zeolite during regeneration using dry air at 320°C, for 2 hours at ambient pressure found that the bed retained about 8% of adsorbed tritiated water, and it was retained during repeated drying using dry air. 12 This portion of irreversibly adsorbed tritium is likely chemically bound tritium, such as hydroxyl groups on the molecular sieve surface. However, this retained tritiated water was mostly removed (Decontamination Factor = 69) when treated with humid air, indicating isotopic exchange activity.…”