Computational risk assessment framework for a High Temperature Electrolysis Facility powered by Nuclear Power and exposed to seismic hazard

High Temperature Electrolysis Facilities (HTEFs) powered by Nuclear Power Plants (NPPs) can provide a costefficient way for large-scale production of clean hydrogen. As safety needs to be evaluated, in this paper we present a computational risk assessment framework for the resulting integrated system. Monte Carlo Simulation with Importance Sampling (MCS-IS) is used for the generation of scenarios that may occur from the coupling of HTEFs and NPPs. An application is shown with reference to a preliminary design of an integrated hydrogen production system in which the steam and electric power produced by a NPP are supplied to the HTEF. The HTEF and NPP system of systems is assumed to be located in a region where potential seismic activity cannot be excluded. Results show that overcurrent events leading to a Loss of Heat Sink (LHS) are the main contributors to risk.

Keywords: High Temperature Electrolysis Facility (HTEF), Nuclear Power Plant (NPP), Computational risk assessment, Monte Carlo Simulation (MCS), Importance Sampling (IS).