Multi-level risk-based stress test methodology for critical non-nuclear infrastructure systems [Elektronski vir]
Esposito, Simona ...
A more resilient society requires improved and standardized tools for integrated risk management applicable to different type of civil infrastructure systems. Among the most important tools are the ...stress tests. A need to develop appropriate stress tests for all classes of critical civil infrastructures arose following the post-Fukushima nuclear power plant stress tests. In this paper, a harmonized approach to stress test non-nuclear Critical Infrastructure (CI) systems against natural hazard events is presented and a risk-based multi-level stress test methodology are proposed. A stress test comprises four main phases. First the goals, the methods for the risk analysis, the time frame, and the total costs of the stress test are defined. The stress test is then performed at the component and the system levels, which is followed by verification and analysis of the stress test findings. A penalty system is defined to acknowledge the limitations of the methods used to stress test the CI and adjust the output of the risk assessment. The adjusted results are the input to a grading system, which is utilized to determine the grade and the outcome of the stress test. Finally, the results are reported and communicated to stakeholders and authorities.
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