Gas-phase molybdenum-99 separation from uranium dioxide by fluoride volatility using nitrogen trifluoride

Production of the important Tc-99m medical isotope parent, molybdenum-99 (Mo-99), via the fissioning of high- and low-enriched uranium (HEU/LEU) targets followed by target dissolution in acid and solution-phase purification of Mo-99 is time-consuming, generates quantities of corrosive radioactive waste, and can result in the release of an array of radionuclides to the atmosphere. An alternative Mo-99 purification method has been devised that has the potential to alleviate many of these issues. Herein, we demonstrate the feasibility of a rapid Mo/Tc gas-phase separation from UO2. The results indicate that volatile [Mo-99]Mo can be captured downstream of the reacted solid mixture on a column bed (trap) of alumina; the majority of the captured [Mo-99]Mo can be subsequently eluted from the alumina trap with a few milliliters of water. >1.0 x 10(5) single pass decontamination of U and the collected [Mo-99]Mo product is demonstrated. This simple thermo-fluorination technique has the potential to provide a rapid methodology for routine Mo-99 production.