The head of the International Atomic Energy Agency (IAEA) has described the situation at Ukraine’s Russian-occupied nuclear power plant in Zaporizhzhya as highly volatile and fragile. All the principles of nuclear safety have been violated in one way or another, Rafael Grossi told a press conference at the UN headquarters in New York late Tuesday. With six units and a capacity of 6,000 megawatts, the plant in the city of Enerhodar in Zaporizhzhya province is the largest nuclear power plant in Europe. An IAEA inspection to check technical safety is urgently needed, Grossi said. But it is curren…