Read our Privacy noticeThe U.N. atomic watchdog's board held a special session Friday to discuss risks to nuclear safety in Ukraine as concerns mount that relentless Russian attacks on its energy infrastructure pose an increasing danger of a nuclear accident. Russia's “ongoing and daily” attacks against Ukraine's energy infrastructure in recent weeks have caused significant damage, Netherlands Ambassador Peter Potman told the board. Ukraine has four nuclear power plants, three of them under Kyiv’s control. The fourth and biggest, the Zaporizhzhia nuclear power plant, has been occupied by Russian forces since the early days of Moscow’s full-scale invasion in 2022. “As we speak, an IAEA expert mission is underway at Ukraine’s electrical substations amid ongoing strikes on the country’s power infrastructure," Grossi said.