Iran's key nuclear sites
Satellite images, released by Google, show how Iran's heavy water reactor and heavy water plant at Arak has changed over the past year. New buildings are highlighted on the right-hand panel. The IR-40 reactor was inspected by the International Atomic Energy Agency (IAEA) in October 2011. The agency said in its recent report that, "construction of the facility was ongoing and the coolant heat exchangers had been installed".
The IAEA also added, "Iran has not suspended work on all heavy water related projects, including the construction of the heavy water moderated research reactor, the Iran Nuclear Research Reactor (IR-40 Reactor), which is subject to Agency safeguards."
The annotations above are sourced to the Institute for Science and International Security.