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A   Research Service
Russian Military Actions at Ukraine's Nuclear
Power Plants
Updated September 12, 2022
Russia's ongoing military occupation of Ukraine's six-reactor Zaporizhzhia nuclear power plant
(ZNPP)-the largest in Europe-has raised widespread alarm about potential damage to the plant that
could cause large radioactive releases to the environment. Russian forces captured the plant on March 4,
2022, with reported heavy fighting and artillery shelling.
Shelling around the plant resumed on August 5, 2022, prompting the International Atomic Energy Agency
(IAEA) to warn, Any military firepower directed at or from the facility would amount to playing with
fire, with potentially catastrophic consequences. Continued shelling during August and September 2022
repeatedly disabled the plant's connections to the surrounding power grid. Whenever offsite power was
lost, the two reactors that have been operating since the Russian takeover would usually shut down for
safety reasons and then restart when power lines were repaired. According to Ukraine's nuclear safety
agency, the plant was reconnected to the grid as of September 12, 2022, but all six of the plant's reactors
were in cold shutdown because of ongoing shelling in the area.
After months of negotiation, an IAEA expert team arrived at ZNPP on September 1, 2022, to assess the
conditions at the plant. IAEA's report on the mission, issued September 5, 2022, described extensive
damage to plant facilities and surrounding infrastructure. The report warned that continued military action
represented a constant threat to nuclear safety and security because critical safety functions (containment
of the radioactivity and cooling in particular) could be impacted. The report called for establishment of
a nuclear safety and security protection zone around the ZNPP. It also noted that the plant's operating
staff is subject to constant high stress and pressure which could lead to increased human error with
implications on nuclear safety. Russian forces have seized control of ZNPP and its management, but the
plant's operational personnel have remained on duty. IAEA experts will remain at the plant to monitor
safety conditions.
Nuclear Power Plants Operating in Ukraine
Ukraine has four operating nuclear power plant sites with a total of 15 reactors, which in recent years
have provided about half of Ukraine's total electricity generation. All the operating Ukrainian reactors are
Congressional Research Service
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