This thesis deals with the thermomechanical analysis of the safety injection line of a pressurized water reactor, with the aim of assessing the influence of operating pressures and temperatures on the structural behavior of the pipeline. The analysis is carried out using the finite element method in the Abaqus software, where material properties, boundary conditions, and loads are defined. The results present the temperature and stress distribution along the pipeline and enable the evaluation of stress-strain state at critical locations. Based on the obtained results, the safety of the pipeline is assessed in accordance with nuclear industry standards, confirming the potential occurrence of failures over a long-term operating period.
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