MOSCOW: Kyiv and Moscow on Sunday traded accusations of shelling on the territory of the Zaporizhzhia nuclear power plant that Russia controls in southern Ukraine.
The UN atomic watchdog that has a team of experts at the plant -- the biggest nuclear facility in Europe -- said "powerful explosions" had occurred on Saturday and Sunday.
Kyiv "does not stop its provocations aiming at creating the threat of a man-made catastrophe at the Zaporizhzhia nuclear power plant", the Russian army said in a statement on Sunday.
Despite the shelling, radiation levels "remain normal", the army added.
It said missiles exploded around a power line that feeds the plant, the fourth and fifth power units and "special building number 2".
Renat Karchaa, an adviser to the Russian nuclear agency Rosatom, told state-run agency Tass that the "special building" contained nuclear fuel.
Ukrainian nuclear energy agency Energoatom said shortly after that Russia was behind the explosions.
"This morning on November 20, 2022, as a result of numerous Russian shelling, at least 12 hits were recorded on the territory of the Zaporizhzhia nuclear power plant," Energoatom said.
It accused Russia of "once again... putting the whole world at risk".
"The news... is extremely disturbing. Explosions occurred at the site of this major nuclear power plant, which is completely unacceptable," UN atomic watchdog chief Rafael Grossi said in a statement.
He added that the damage to buildings, systems and equipment recorded so far was not "critical".
The explosions were "abruptly ending a period of relative calm at the facility and further underlining the urgent need for measures to help prevent a nuclear accident there", the statement read.
Moscow and Kyiv have traded blame for months over shelling near the Russian-held facility, sparking fears of a nuclear disaster and spurring calls to de-militarise areas around atomic facilities in Ukraine.
An IAEA team on the ground said there had been damage to some buildings, systems and equipment at the plant, Europe's largest nuclear power station. The IAEA team could see some of the explosions from their windows.
"The news from our team yesterday and this morning is extremely disturbing," Rafael Grossi said in a statement.
"Explosions occurred at the site of this major nuclear power plant, which is completely unacceptable. Whoever is behind this, it must stop immediately. As I have said many times before, you're playing with fire!"
The Zaporizhzhia nuclear power plant has six Soviet-designed VVER-1000 V-320 water-cooled and water-moderated reactors containing Uranium 235, which has a half-life of more than 700 million years.
The reactors are shut down but there is a risk that nuclear fuel could overheat if the power that drives the cooling systems was cut. Shelling has repeatedly cut power lines. -- Agencies
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