Sorption of NbF5 from UF6-containing gases on granulated sodium and magnesium fluorides

The capacity for NbF5 of granulated sodium fluoride at 100 and 400°C and of magnesium fluoride at 125°C was determined. The choice of the sorbents and temperatures is governed by the possibility of using the sorbents at these temperatures for decontamination of UF6 from fission product impurities in reprocessing of spent nuclear fuel by the fluoride volatility technology. The presence of UF6 in the gases does not appreciably affect the sorbent capacities. Sodium fluoride at 400°C is suitable for decontamination of UF6 from NbF5 as one of impurities.