Welcome to the HTTR Home Page.

 The HTTR (High Temperature Engineering Test Reactor), with a thermal power of 30 MW, is a research facility constructed for development of High Temperature Gas-Cooled Reactor (HTGR) technology and nuclear heat utilization technology as well as for irradiation of materials under high-temperature conditions. The first criticality of the HTTR was attained on November 10, 1998. The full power of 30 MW and the reactor outlet coolant temperature of 850°C was achieved on December 7, 2001. Rated power operation and safety demonstration tests started in FY2002. The maximum reactor outlet coolant temperature of 950°C was achieved in April 2004.

mail to:oarai-httrpms@jaea.go.jp