Dec 6 (Reuters) - Russian Defence Minister Sergei Shoigu said on Tuesday that Ukraine was continuing to shell the Zaporizhzhia nuclear power plant, deliberately creating the threat of a possible nuclear catastrophe.Shoigu said Russian forces were taking "all measures" to ensure the safety of the power plant, Europe's largest, in the face of what he called "nuclear terrorism" from Kyiv."Our units are taking all measures to ensure the safety of the Zaporizhzhia nuclear power plant," Shoigu told his military chiefs in a conference call, an abridged transcript of which was published by the defence ministry.Shoigu said Ukraine had fired 33 large-caliber shells at the plant in the last two weeks.The United Nations' nuclear watchdog - the International Atomic Energy Agency (IAEA) - is pushing for the creation of a security zone around the plant, fearful of a potential Chornobyl-like disaster."