Ukraine's Energoatom and Russia's TVEL have signed a supplementary agreement on supplies of Russian nuclear fuel for Ukrainian nuclear power plants in 2015-2016, Energoatom Director for Security Danko Biley has said.

"[The two companies] have signed a supplementary agreement that will ensure the supply of nuclear fuel in 2015-2016," he said.

Biley recalled that in addition to Russian fuel, Yuzhnoukrainsk Nuclear Power Plant also uses fuel from U.S. company Westinghouse.

Energoatom is the operator of all four Ukrainian-based operating nuclear power plants, which have 15 VVER reactors with an overall generating capacity of 13.835 gigawatts.