Preliminary Hazard Analysis for Hydrogen Production by Coupled High Temperature Electrolysis Facilities and Nuclear Power Plants

Coupling of High Temperature Electrolysis Facilities (HTEFs) and Nuclear Power Plants (NPPs) is a promising solution for large-scale clean hydrogen production.A preliminary hazards analysis of the system of systems made of HTEF and NPP is presented with reference to a preliminary design in which steam and electricity are supplied by the NPP to the HTEF.The outcomes of the analysis point at the fact that hydrogen leakage, steam leakage and overcurrent events on the HTEF side may contribute to an increase in the risk at the NPP side, in terms of higher probability of Loss Of Offsite Power (LOOP), Main Steam Line Break (MSLB) and Loss of Heat Sink (LHS).