A cooling system for the secondary helium loop in VHTR-based SI hydrogen production facilities

► Introduction of a coupling system in VHTR-based SI hydrogen production facilities. ► Evaluation of thermal disturbance due to the malfunction of SI process components. ► Conceptual design of a helium cooling system to mitigate thermal disturbance. ► Design information of a steam generator and forced-draft air-cooled heat exchanger.