Fugen Nuclear Power Plant
| Fugen Nuclear Power Plant | |
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The Fugen NPP in 1975, Image: Japan Ministry of Land, Infrastructure and Transport
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 Location of Fugen Nuclear Power Plant in Japan
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| Country | Japan |
| Coordinates | 35°45′16″N 136°00′59″E / 35.75444°N 136.01639°ECoordinates: 35°45′16″N 136°00′59″E / 35.75444°N 136.01639°E |
| Status | Decommissioned |
| Construction began | May 10, 1972 |
| Commission date | March 20, 1979 |
| Decommission date | March 29, 2003 |
| Operator(s) | Japan Atomic Energy Agency |
| Nuclear power station | |
| Reactor type | HWLWR |
| Power generation | |
| Units decommissioned | 1 x 165 MW |
| Nameplate capacity | 165 MW |
| Capacity factor | 23.9% |
| Annual output | 345 GW·h |
Fugen ふげん (Fugen?) is a prototype Japanese nuclear test reactor that is shut down and awaiting decommissioning. It is located in Myōjin-chō, in the city of Tsuruga, Fukui. The design is an Advanced Thermal Reactor, which is a product of Japan. The name "Fugen" is derived from Fugen Bosatsu (Samantabhadra), 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 (BWR) 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. On March 3, 2005, the reactor stopped operations.
The plant is located on a site that covers 267,694 m2 (66 acres); buildings occupy 7,762 m2 (1.9 acres), and it has 46,488 m2 of floor space. It employed 256 workers.
During dismantling operations it was found that walls with controls did not have the necessary strength at 25 of 34 points.
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