- Summary- Companies- IAEA says Ukraine plant rocked by 12 blasts- Plant is controlled by Russian forces- Moscow and Kyiv accuse other of shelling- 'You're playing with fire!'- IAEA chiefLONDON, Nov 20 (Reuters) - Ukraine's Zaporizhzhia nuclear power plant, which is under Russian control, was rocked by shelling on Sunday, drawing condemnation from the U.N. nuclear watchdog which said such attacks risked a major nuclear disaster.Repeated shelling of the plant in southern Ukraine, which Russia took control of shortly after its February invasion, has raised concern about the potential for a grave accident just 500 km (300 miles) from the site of the world's worst nuclear accident, the 1986 Chornobyl disaster.The Zaporizhzhia nuclear power plant provided about a fifth of Ukraine's electricity before Russia's Feb. 24 invasion, and has been forced to operate on back-up generators a number of times.SIDES SWAP BLAMEBoth Kyiv and Moscow have accused each other of attacking the plant on several occasions during the conflict and risking a nuclear accident, and they again exchanged blame on Sunday."