Multi-hazard Probabilistic Safety Assessment of nuclear sites

抄録

This paper gives an overview of some main achievements of the NARSIS European project, which aimed at proposing some possible improvements related to the Probabilistic Safety Assessment of nuclear sites, in case of combined and/or cascade natural disasters. The project proposed a multi-hazard as well as a Bayesian Networks-based multi-risk framework, allowing to better: (i) characterize single and combined natural hazards for a given site; (ii) estimate the vulnerability of technical and human systems and related consequences; (iii) evaluate and constrain uncertainties. As part of the effort, many datasets were collected, states of the art produced and methodologies tested for nuclear safety assessment of virtual/real pressurized water reactors, leading to the release of various software tools and recommendations for use. This paper presents a rapid tour illustrated by one of the project applications related to the fragility assessment of a protection dyke under a multi-hazard scenario.