ANALYSIS OF A NUCLEAR POWER PLANT FAILURE USING TEMPORAL NETWORKS

Abstract eng:
The recent thrust, from both the scientists and policy makers, to increase community resilience identifies lifelines as one of the most important field to intervene on. Lifelines are critical infrastructures which are highly interdependent to each other, and this interdependency can lead to cascading effects when a failure occurs. For this reason the interdependencies should be analyzed also taking into account the time effect. The aim of this paper is to introduce a suitable method for modeling the interdependencies of lifelines even in emergency situations, when the networks change over time. The methodology proposed relies on the Input-output Inoperability Model which has been modified according to the criteria of temporal networks. The critical infrastructures are modeled as graphs and the failure of the elements of the network propagates according to determined rules. Graphs are then interconnected in order to simulate the cascading effects. The Fukushima nuclear power plant disaster has been studied, as it is one of the most complete example of failure due to interdependencies and temporal effects. Results show that the developed methodology applied to a detailed model of the nuclear power plant is able to effectively describe the evolving situation.

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