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Study of new routes for purification of fission 99Mo
2021 - DAMASCENO, M.O.; MARQUES, F.A. da S.; DIAS, R.R.; SANTOS, J.L.; FORBICINI, C.A.L.G.O.
99mTc is the most used medical radioisotope in the world, especially for diagnosis procedures. It is originated in the radioactive decay of 99Mo, which in turn is one of the fission products of the uranium irradiation that occurs in nuclear reactors. The chemical processing of 99Mo might be lined up in several steps according to the characteristics of the targets or the local requirements in order to separate it from other fission products. In this work, two routes of 99Mo purification, MR1 and MR2, were purposed as an alternative method to be set up in the Brazilian Multipurpose Reactor project. The MR1 route consisted by three consecutives chromatographic columns packed with strong anionic resin, Chelating resin, and aluminum oxide, respectively. The MR2 route was arranged in two chromatographic columns and a sublimation oven. The final yield for the MR1 was 84.4% and the overall time process was about 7 hours, performing the highest final 99Mo recovery efficiency, high decontamination degree and a shorter process time compared to the MR2.
Preparation of Pb membrane on porous stainless steel support modified with Zr for hydrogen purification
2008 - SANTOS, J.L. dos; ZINI, J; CARVALHO, F.M.S.