Strategies for decommissioning small nuclear reactors in Brazil
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Nuclear Engineering and Design
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The process of decommissioning nuclear reactors is a complex activity that involves various technical and
administrative stages. Its main objective is to ensure the safety of the site, workers, the general public, and the
environment during the execution of decommissioning activities, aiming for the release of the site from regulatory
control. In the Brazilian context, it is essential to develop decommissioning strategies, taking into
consideration the established technical and regulatory requirements, as well as following the guidelines of the
Brazilian Nuclear Policy (BNP). Eight decommissioning strategies were proposed for small reactors, with
different objectives and in different scenarios, encompassing 23 decommissioning approaches, divided into 6
groups: 1) decontamination and dismantling (DD); 2) radioactive waste (RW) management; 3) RW storage
management; 4) human resources (HR) and knowledge management; 5) cost estimation; and 6) financial fund
management. Additionally, 18 factors affecting the selection of these approaches were considered, taking into
account particularities of the Brazilian context. A qualitative risk analysis was conducted using risk assessment
techniques from the ABNT NBR ISO/IEC 31,010 standard, with a focus on the Multicriteria Decision Analysis
(MCDA) technique. This qualitative analysis allowed for the evaluation of the approaches considering the current
scenario and the future scenario, which includes possible changes in the BNP currently under discussion in the
National Congress. The observations and results obtained in this study will be useful in guiding future efforts
related to nuclear reactor decommissioning projects in Brazil. Based on the proposed strategies and considerations
of safety, regulation, and governmental policies, it will be possible to plan and execute decommissioning
activities more efficiently and safely.
Como referenciar
CALDAS NETO, A.B.; SILVA, A.T. Strategies for decommissioning small nuclear reactors in Brazil. Nuclear Engineering and Design, v. 414, p. 1-14, 2023. DOI: 10.1016/j.nucengdes.2023.112608. Disponível em: http://repositorio.ipen.br/handle/123456789/34375. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.