Nuclear fuel for those plants is generally produced in Russia, through Swedish manufacturer acquired in the previous decade the patents/designs to produces fuel rods that fit those plants.
Sure, it will still be hard to separated Rosatom from those power plants but it not impossible.
Hungary and possibly Austria. Hungary even signed a deal with Rosatom to extend their Pecs nuclear powerplant.
https://www.politico.eu/article/hungary-approves-constructio...