Wikipedia
Joyo
Joyo may refer to:
- Joyo (tribe) in Pakistan
- Jōyō, Kyoto, a city in Japan
- Jōyō, Fukuoka, a former town in Japan
- Jōyō kanji, a set of characters used in Japanese writing
- Joyo Bank, a banking company in Japan
- Joyo.com, a Chinese website acquired by Amazon.com
- Jōyō (nuclear reactor), a liquid metal research reactor
Jōyō (nuclear reactor)
is a test sodium-cooled fast reactor located in Ōarai, Ibaraki, Japan, operated by the Japan Atomic Energy Agency. The name comes from the previous country name of the area around Ibaraki.
It was made with the purpose of doing tests on and advancing the development of that type of reactor, as an irradiation test facility for construction materials. It also does tests with the nuclear fuel as well as activation experiments.
The reactor has gone through 3 different core changes.
- MK-I April 24, 1977 - January 1, 1982 (the power was 50-75 MWt)
- MK-II November 22, 1982 - September 12, 1997. This core surpassed 50,000 hours of operating time with 100 MWt.
- MK-III July 2, 2003–2007 (140-150 MWt).
The current core provides the neutron flux of 4×10 cms for E>0.1 MeV.
After an incident in 2007, the reactor is suspended for repairing, recovery works were planned to be completed in 2014.