MOSCOW, April 10 - Russia's state nuclear power corporation Rosatom has concerns that politics will affect deliveries of fuel for Ukrainian nuclear power plants involving the U.S. company Westinghouse, Rosatom chief Sergei Kiriyenko said in Moscow on Thursday.

The nuclear sector's number one priority is safety, so the key condition is that all decisions are made based on well-thought-out technological and technical conditions, commercial terms and, "preferably, that political aspects are not an impediment," Kiriyenko said. "If decisions in nuclear energy are beginning to take on a political color, then that already presents a threat," he said.