Impact of Irradiation and Decay Time on Chemical Speciation in Uranyl Sulfate Solution

Partitioning of Radionuclides in Various Streams of the Mo-99 Purification Process

“…Irradiations of 50 mL low-enriched uranium (LEU) uranyl sulfate solution were conducted inside the UNI setup, which was previously described in detail [1,2]. In the UNI, a 40 MeV (megaelectron volt) electron beam impinges on a tantalum X-ray converter, producing an intense beam of Bremsstrahlung photons.…”

“…The distribution of I among molecular iodine, iodate, and iodide species in the uranyl sulfate target solution from irradiation #2 was determined at three points following the end of the irradiation using a solvent extraction method described previously [2]). Briefly, molecular iodine was extracted into a chloroform phase from an initial aqueous sample.…”

“…The Universal Neutron Irradiator (UNI) was designed to irradiate a small volume of uranium solution and to achieve high fission power without creating a large radionuclide (RN) inventory [1,2]. The UNI system is equipped with a fully enclosed off-gas system with online hydrogen gas monitoring to prevent the production of an explosive atmosphere, as well as storage cylinders for capturing fission gases.…”