Application of probabilistic safety assessment (PSA) to the power reactor innovative small module (PRISM)

Seismic Resilience Assessment of Small Modular Reactors by a Three-Loop Monte Carlo Simulation

“…Accident sequence analysis is performed with logic models, such as event trees that define the accident sequences triggered by seismicinduced initiators, linked with fault trees that describe the basic events that might lead to components and system failures (IAEA, 2021). In the case of SMRs, one must account for the fact that multiple reactor units are located on the same site (Alrammah, 2022). In this work, we then adopt a multi-unit logic model (US Nuclear Regulatory Commission, 2020) to extend the single unit logic model by correcting the basic events probabilities to account for the likelihood of extension to multiple units.…”