Russia on Wednesday signed a long-term deal worth around 300 million euros ($399 million) for the delivery of nuclear fuel for the third and fourth reactors of the Slovakian nuclear power plant at Mochovce.

The contract was signed between Russia's state-controlled nuclear fuel producer TVEL and Slovenske Elektrarne during Russian President Dmitry Medvedev's visit to Slovakia.

The contract, which was concluded for the period from 2012 to 2017, provides for the supply of the first two primary circuits and five recharge sets of fuel assembly for each of the power units that are currently under construction, TVEL said in a statement.

"Units of the Slovak NPP are to be supplied with advanced fuel with higher than average enrichment providing more benefit as a result of better burn-up fraction and more economic fuel makeup," the statement said.

Nuclear power plants in Slovakia were built using Russian light-water reactor technology. Under an inter-governmental agreement signed between the Soviet Union and Czechoslovakia, Russian technology was used to build and operate the Bohunice plant, with a capacity of 1.76 GW (four VVER-440 units) and the Mochovce plant with an output of 880 MW (2 VVER-440 units).