Ukraine on Thursday formally sacked and branded a traitor the Ukrainian engineer appointed by Moscow to head Europe's largest nuclear facility, the Zaporizhzhia plant, which is under Russian occupation.Yuri Chernichuk, the facility's chief engineer, said on Wednesday that he had agreed to take the post because it was "in my opinion the only correct decision.""Instead of making every effort to free the station as soon as possible, he decided to help Russian occupiers legalize its criminal seizure and now incites other workers to do the same," Kotin said on Telegram.Russia seized the Zaporizhzhia power plant in southern Ukraine soon after invading the country in February.The UN's atomic watchdog in November denounced strikes on the plant's territory, calling for a "stop to this madness.""