Diplomats: Iran begins exporting excess heavy water
VIENNA — Iran has begun to export excess quantities of a material that could be used in the process to make atomic arms as it moves to end a small but significant violation of a landmark nuclear deal, two diplomats told The Associated Press on Monday.
At issue is heavy water, which is used to cool reactors that can produce substantial amounts of plutonium. That, in turn, can be applied to making the fissile core of nuclear warheads.