6:21 p.m. ET, November 23, 2022
UN nuclear watchdog: "Increasingly precarious" nuclear safety situation at Zaporizhzhia power plant
From CNN's Radina Gigova in London
Zaporizhzhia Nuclear Power Plant, Europe's largest nuclear power station, is seen on October 29, in Prydniprovske, Ukraine.
(Carl Court/Getty Images)
Ukraine’s Zaporizhzhia Nuclear Power Plant lost access to external electricity again on Wednesday and is relying on emergency diesel generators, the International Atomic Energy Agency said, warning of the "increasingly precarious and challenging nuclear safety and security situation" at the plant.
The team of IAEA experts present at the power plant said it lost off-site power at 3:30 p.m. local time Wednesday when it was fully disconnected from the grid, "following reports of widespread military action targeting Ukraine’s energy infrastructure," IAEA said in a statement.
"Initially all the site’s 20 diesel generators started operating automatically, and now eight of them are supplying the site with back-up electricity needed for all safety related equipment. The other 12 diesel generators are in stand-by mode," IAEA said.
"The IAEA team also reported that the plant’s operating personnel were performing all activities according to procedures for a loss of off-site power event and that the six reactors were in a safe and stable state," IAEA said. "The two reactors that have been in a hot shutdown mode to provide the plant and the nearby town of Enerhodar with steam and heating will be prepared for cooling down. The four others remain in cold shutdown," it added.
Some context: The Zaporizhzhia plant has been disconnected from the national grid several times during the fighting in Ukraine, "most recently in early November when it took two days to restore external power supplies," the agency said.
IAEA also said it has received information from Ukraine’s national operator Energoatom that “due to a decrease in the frequency in the power system of Ukraine" all power units at two other plants — the Rivne Nuclear Power Plant and the Khmelnytskyy Nuclear Power Plants — were automatically disconnected as part of emergency protection.
"The need for secure off-site power supply from the grid for all nuclear sites is one of the seven indispensable pillars for ensuring nuclear safety and security during an armed conflict," IAEA said.