Título:	Integration of Models to Enhance the Verification Process of Nuclear Systems
Autor(es):	Matias Avelar, Alan
Orientador(es):	A. Yakimenko, Oleg Su, Jian
Palavras-chave:	Model-based systems engineering Verification and validation Best estimate plus uncertainty
Áreas de conhecimento da DGPM:	Engenharia nuclear
Setor da Marinha:	Diretoria-Geral do Desenvolvimento Nuclear e Tecnologia da Marinha (DGDNTM)
Data do documento:	2025
Editor:	Naval Postgraduate School
Descrição:	The lack of integration between computer-aided engineering (CAE) and model-based systems engineering (MBSE) tools hinders the assessment of how design changes affect system requirements. To address this challenge, this thesis proposes a model breakdown structure methodology implemented using MathWorks’ System Composer to integrate MBSE and CAE models. The Brazilian Multipurpose Reactor is used as a case study to demonstrate the effectiveness of the proposed methodology. An enhanced, automated verification process is achieved by linking system requirements to a finite element analysis that calculates fuel and cladding temperature distributions in a slow loss of flow accident scenario. First, a Latin hypercube design is employed to evaluate how variations in design factors influence cladding temperature. Second, the Wilks’ theorem is applied to calculate the maximum response with a 95% confidence level and 95% probability. The results indicate that the 95/95 upper limit of the peak cladding temperature remains below the onset of nucleate boiling. Furthermore, the integrated model is expected to significantly reduce the effort required for uncertainty quantification.
Tipo de Acesso:	Acesso aberto
URI:	https://www.repositorio.mar.mil.br/handle/ripcmb/848004
Tipo:	Dissertação
Aparece nas coleções:	Ciência, Tecnologia e Inovação: Coleção de Dissertações

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