HIROMOTO, GORODELLAMANO, JOSE C.2018-01-162018-01-16HIROMOTO, GORO; DELLAMANO, JOSE C. Radioactive decay pattern of actinides present in waste from Mo-99 production. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. <b>Proceedings...</b> Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28323.http://repositorio.ipen.br/handle/123456789/28323Brazil is currently planning to produce 99Mo from fission of LEU targets to meet the present national demand of 99m Tc. The 99Mo activity planned at the end of irradiation is 5000 Ci (185 TBq) per weekly cycle, in order to meet the present demand of 1000 Ci (37 TBq) per week, after target cooling and processing. To predict the activities that will be handled in the waste treatment facility, the computational code SCALE 6.0 was used to simulate the irradiation of the uranium targets and the decay of radioactive products. This study presents the findings of this research, mainly focused on the actinides activity that will be present in the waste and the respective radioactive decay pattern over a period of one hundred thousand years.openAccessactinidescomputerized simulationdaughter productsirradiationmolybdenum 99radioactive wastesradioactivitys codesuranium 235 targetTexto completo de eventohttps://orcid.org/0000-0001-8999-8548