Integrated assessment of thermal hydraulic processes in W7-X fusion experimental facility

In this article, the numerical investigation of thermal-hydraulic processes in cooling systems of in-vessel components, vacuum vessels and pressure increase protection system of fusion devices is presented. Using the experience gained from the modelling of “Ingress of Coolant Event” experimental facilities, the numerical model of Wendelstein 7-X (W7-X) experimental fusion device was developed. The integrated analysis of the thermal-hydraulic processes occurring in the cooling system of in-vessel components, vacuum vessel and pressure increase protection system of W7-X device in the case of loss of coolant accident was performed using RELAP5 computer code. The results of analysis showed that the design of W7-X facility prevents the failure of vacuum vessel.