Operation, test, research and development of the High Temperature engineering Test Reactor (HTTR) (FY2004)

Department of HTTR

The High Temperature Engineering Test Reactor (HTTR) at the Oarai Research and Development Center of the Japan Atomic Energy Agency (JAEA) is the first high-temperature gas-cooled reactor (HTGR) in Japan with thermal power of 30MW, which is a graphite-moderated and helium gas-cooled reactor. In April 2004, the HTTR achieved the maximum reactor outlet temperature of 950 degree for the first time in the world. In June 2004, JAEA obtained commissioning license from the MEXT for the operation at 950 degree. This report summarizes activities and results on HTTR operation and maintenance as well as several R&Ds, which were carried out in the fiscal year of 2004.