Increasing productivity in the manufacture of UAl2-Al dispersion-plate targets for Mo-99 production

Autor(es)

Durazzo, Michelangelo ^[1] ; Conturbia, Giovanni L. C. R. ^[1] ; de Carvalho, Elita F. Urano ^[1]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, Nucl & Energy Res Inst, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PROGRESS IN NUCLEAR ENERGY; v. 140, OCT 2021.
• Citações Web of Science: 0

Resumo

Molybdenum-99 is the most important isotope because its daughter isotope, technetium-99 m, has been the most widely used medical radioisotope. The primary method employed to produce Mo-99 derives from the fission of U-235 incorporated in so-called irradiation targets. Pushed by the international Mo-99 crisis that occurred in 2009/2010, Brazil has decided to construct a new research reactor, the Brazilian Multipurpose Reactor (RMB), to produce this vital radioisotope to meet the Brazilian domestic demand. As part of this effort, it has been developed the process for manufacturing the target to be used in the production of Mo-99 by nuclear fission. The low enriched uranium (LEU) aluminide with the predominant phase UAl2 was the starting material. The pictureframe technique was used to clad UAl2-Al briquette with aluminum to obtain plate-type targets. It was developed an innovative method that allows increasing the productivity of this type of target based on multi-core rolling. A thermomechanical treatment was designed to get targets composed basically of a mixture of UAl3/UAl4 that are the required phases for a proper radiochemical dissolution after irradiation. The manufacturing process proved to be suitable for domestic production of targets, fulfilling the specification to produce Mo-99 in the Brazilian Multipurpose Reactor. (AU)

• Processo FAPESP: 18/18228-1 - RERTR-2018 Encontro International sobre Redução de Enriquecimento para Reatores de Pesquisas e Testes
• Beneficiário: Michelangelo Durazzo
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior
• Processo FAPESP: 11/13849-9 - Desenvolvimento da tecnologia de fabricação de alvos de dispersão UAlx-Al para nacionalização da produção de 99Mo por fissão nuclear
• Beneficiário: Michelangelo Durazzo
• Modalidade de apoio: Auxílio à Pesquisa - Regular