Control strategies for the transients of hydrogen production plant in VHTR co-generation systems

Sato, Hiroyuki  ; Kubo, Shinji  ; Yan, X. ; Tachibana, Yukio ; Kato, Yukitaka*

One of the key areas to be investigated in VHTR co-generation system is an operability during transients initiated by the abnormal events by the hydrogen production plant since a continuous reactor operation and electricity generation is required in case of abnormal events in the hydrogen production plant from the economical point of view. In this study, control strategies are proposed and investigated against the transients initiated in the hydrogen production plant. Various transients were evaluated using the newly developed dynamic simulation code based on the RELAP5. The simulation results showed that the reactor could operate continuously during the transients of hydrogen production plant employing the proposed control strategy. In addition, the advantages of combining several control strategies are discussed comparing to the single application.