Sodium Fluoride Pellets Use in UF6 and HF Chemical Traps

Sodium fluoride is one of the most important adsorbents in enrichment facilities, where it is availabe in the form of powder and pellets. Linear and parabolic curve of the reaction between uranium hexafluoride and sodium fluoride, in the form of powder, in comparison with the parabolic curve of sodium fluoride in the form of pellets is shown that it is the best shape for the sodium fluoride adsorbents. But, it is impossible to determine these properties only by comparison of UF6 and NaF reaction kinetics and, selecting the shape and dimension requires the study of the effects of loading and pressure drop. In this paper, effects of adsorbents shape on pressure drop and capacity is studied. Based on these studies, it was realized that as the dimension of adsorbents decreases, the active surface area increases and cansequently, the final capacity of the adsorption decreases.