is a test

sodium-cooled fast reactor A sodium-cooled fast reactor is a fast neutron reactor cooled by liquid sodium. The initials SFR in particular refer to two Generation IV reactor proposals, one based on existing liquid metal cooled reactor (LMFR) technology using mixed oxide fue ...

located in

Ōarai, Ibaraki is a town located in Ibaraki Prefecture, Japan. , the town had an estimated population of 15,867 in 6,881 households and a population density of . The percentage of the population aged over 65 was 34.0%. The total area of the town is . The Japa ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

, operated by the

Japan Atomic Energy Agency The is an Independent Administrative Institution formed on October 1, 2005 by a merger of two previous semi-governmental organizations. While it inherited the activities of both JNC and JAERI, it also inherited the nickname of JAERI, "Genken" ...

. 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 4×10¹⁵ cm⁻²s⁻¹ 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. Following the closure of the unsuccessful follow-on

fast breeder reactor A breeder reactor is a nuclear reactor that generates more fissile material than it consumes. Breeder reactors achieve this because their neutron economy is high enough to create more fissile fuel than they use, by irradiation of a fertile mate ...

Monju in 2016, a decision was made to continue research at Jōyō.

References

External links

Official Joyo site (in english)
*T. Soga, W. Itagaki, Y. Kihara, Y. Maeda
Endeavor to improve in-pile testing techniques in the experimental fast reactor Joyo
/ In-pile testing and instrumentation for development of generation-IV fuels and materials. Proceedings of a technical meeting held in Halden, Norway, 21–24 August 2012. - IAEA, 2013. - P. 107–122. *T. Shikama et al
Heavy neutron irradiation test of materials in Joyo instrumented rigs
/ In-pile testing and instrumentation for development of generation-IV fuels and materials. Proceedings of a technical meeting held in Halden, Norway, 21–24 August 2012. - IAEA, 2013. - P. 165–170. {{DEFAULTSORT:Joyo (Nuclear Reactor) Nuclear research reactors Liquid metal fast reactors Buildings and structures in Ibaraki Prefecture Ōarai, Ibaraki

See also

References

External links