The Jules Horowitz Reactor is a Material Test Reactor (MTR) cooled and moderated with water. It is under construction at Cadarache in southern France, based on the recommendations of the European Roadmap for Research Infrastructures Report, which was published by the European Strategy Forum on Research Infrastructures (ESFRI) in 2006. The reactor, which is named for the 20th-century French nuclear scientist Jules Horowitz, is expected to begin operation in 2021.
The Jules Horowitz Reactor's construction was recommended by ESFRI as a replacement for the European Union's existing materials testing reactors, which were all built in the 1960s, and are expected to reach the end of their service lives by 2020. The reactor is being built under the framework of an international consortium of research institutes, including France's CEA, the Czech Republic's NRI, Spain's CIEMAT, Finland's VTT, Belgium's SCK•CEN, the United Kingdom's NNL and the European Commission, along with private companies such as Electricité de France (EDF), Vattenfall and Areva. There are two non-European associate partners to the consortium; India's DAE and Japan's JAEA. The construction of the reactor was funded by (which provided 50% of the project's funding), EDF (20%), various EU research institutes (20%) and Areva (10%). In the framework of the IAEA ICERR label (International Centre based on Research Reactors), the JHR will be also available to institutions from IAEA Member States for education, and joint research and development (R&D) projects.