About
Fugen ふげん was a prototype Japanese nuclear test reactor. Fugen was a domestic Japanese design for a demonstration Advanced Thermal Reactor. It was a heavy water moderated, boiling light water cooled reactor. The reactor was started in 1979 and shut down in 2003. As of 2018, it is undergoing decommissioning. It is located in Myōjin-chō, in the city of Tsuruga, Fukui. The name "Fugen" is derived from Fugen Bosatsu, a Buddhist deity. The reactor was the first in the world to use a full MOX fuel core. It had 772 assemblies, the most in the world. It has received the title of a historic landmark from the American Nuclear Society. The design boils ordinary water like a boiling water reactor but uses heavy water as a moderator as in a CANDU reactor. The electrical output was 165 MW and the thermal output was 557 MW. • Core temperature: 300 °C • Pellet centerline temperature: 2200 °C • Fuel conversion time: 6 months. Read more
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