^{a}and Josef Scheuer

^{b}

^{a}nadine.berner@grs.de

^{b}josef.scheuer@grs.de

The consideration of hazard impacts in the frame of a probabilistic safety analysis (PSA) for complex engineered systems, such as nuclear facilities, is challenging since the impact of even an individual hazard is correlated, com-plex and specific with respect to the given plant system. An appropriate Hazards PSA can be efficiently performed, e.g. by automatically mapping the relevant hazard impact patterns onto the affected fault trees of safety-relevant systems, structures and components (SSCs). Due to the complexity of the hazard compartment dependency patterns derived the intuitive representation as a network graph allows to gain insights into the characteristic properties of a specific hazard impact. The concept of network-based analysis of individual hazard dependency patterns can be extended towards a multidimensional network-based approach to jointly investigate multiple hazard impacts as lay-ers of a multiplex network. The approach can be used as an auxiliary, complementary analysis step of hazard impact patterns prior to their integration in a PSA plant model and yields the methodological base to consider correlations between different hazards beyond the common basic assumption of independent hazard events.