On Sunday, the JCPOA participants concluded an official document outlining the expected roles of all the parties in transforming the Arak Reactor. The United States committed to providing technical support and reviewing the modernized reactor design, while China will participate the reactor’s redesign and construction.
In July, the P5+1 group of countries comprising the United States, Russia, China, France and the United Kingdom plus Germany reached a deal with Iran to ensure the peaceful nature of Tehran's nuclear program in exchange for economic and military sanctions relief.
Under the deal, Tehran agreed to reduce its stock of enriched uranium, decrease the number of centrifuges, reconfigure the heavy-water reactor at Arak, as well as refrain from any uranium enrichment at the Fordow nuclear fuel facility.