VIGGIANO, FELIPESTEFANI, GIOVANNI L. deGENEZINI, FREDERICO A.MOREIRA, JOAO M.L.CUNHA, CAIO J.C.M.2024-06-122024-06-122024VIGGIANO, FELIPE; STEFANI, GIOVANNI L. de; GENEZINI, FREDERICO A.; MOREIRA, JOAO M.L.; CUNHA, CAIO J.C.M. Core reduction for increasing neutron flux and radioisotope production in the IEA-R1 research reactor. <b>Nuclear Engineering and Design</b>, v. 421, p. 1-11, 2024. DOI: <a href="https://dx.doi.org/10.1016/j.nucengdes.2024.113082">10.1016/j.nucengdes.2024.113082</a>. Disponível em: https://repositorio.ipen.br/handle/123456789/48078.0029-5493https://repositorio.ipen.br/handle/123456789/48078This work aims to present and analyze a new reactor core configuration for the IEA-R1 reactor core with the objective of enhancing its neutron irradiation capabilities. The reactor was modeled using the KENO-VI module from the SCALE Code System, provided by ORNL. Results have shown that implementing a near-cylindrical configuration in the IEA-R1 core could substantially increase neutron flux, particularlly in the center irradiation positions such as the EIBe (Beryllium Irradiated Element). After comparing various configurations, we conducted a brief analysis of the proposed core configuration’s potential to produce 177Lu, resulting in a 34% increase in the specific activity of 177Lu considering a 14-day full power cycle.1-11openAccessreactor coresneutron fluxiear-1 reactormonte carlo methodradioisotopescomputer calculationsk codesArtigo de periódico42110.1016/j.nucengdes.2024.113082https://orcid.org/0000-0002-6318-680576.355.33