Fugen Nuclear Power Plant
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|Fugen Nuclear Power Plant|
The Fugen NPP in 1975, Image: Japan Ministry of Land, Infrastructure and Transport
|Construction began||May 10, 1972|
|Commission date||March 20, 1979|
|Decommission date||March 29, 2003|
|Operator(s)||Japan Atomic Energy Agency|
|Nuclear power station|
|Units decommissioned||1 x 165 MW|
|Nameplate capacity||165 MW|
|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 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.
- Core temperature: 300 °C
- Pellet centerline temperature: 2200 °C
- Fuel conversion time: 6 months
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.
- 14–16 April 1997: A tritium leakage was announced to the responsible authorities 30 hours after the event. During the following investigation it was shown that it already had 11 similar incidents. Five managers of the operator at that time (at the time Power Reactor and Nuclear Fuel Development Corporation) resigned.
- 8 April 2002: About 200 cubic meters of steam escaped from a defective pipe. The reactor was switched off.
During dismantling operations it was found that walls with controls did not have the necessary strength at 25 of 34 points.
- JAEA (Japanese). Facilities Quick View.
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