Automated control for electric-thermal load following operation in nuclear gas turbine cogeneration system

Sato, Hiroyuki  ; Yan, X. ; Sumita, Junya ; Terada, Atsuhiko  ; Nishihara, Tetsuo 

This paper presents the original control system design to provide for an extended range of electrical-thermal load-following in the GTHTR300. The turbine speed control is newly added to the basic plant control to take full advantage of the system characteristics of the HTGR and the closed-cycle gas turbine to accomplish the design goal of maintaining constant reactor power and high thermal efficiency during the load-following operation. Simulation result presented in the paper shows that the design goal can be effectively met. The paper also describes a demonstration program to validate the system operability by connecting an electricity and hydrogen cogeneration plant to the HTTR.