Performance analysis is a research field and methodological approach dedicated to the systematic evaluation of the operational characteristics, efficiency, safety, and output of complex systems. Within the domain of nuclear engineering, it specifically investigates the performance metrics of nuclear reactors and related processes, employing quantitative methods to assess energy conversion, reliability, and adherence to regulatory standards. Its significance lies in optimizing operational parameters, enhancing safety protocols, informing design improvements, and contributing to the sustainable development of nuclear energy technologies.