Modernized Fuel for Temelin NPP

A batch of 48 nuclear fuel assemblies of TVSA-T.mod.2 modification was loaded into the VVER-1000 reactor at Temelin NPP Unit 2 in August.

All the TVSA-T.mod.2 fuel assemblies were produced and supplied by TVEL Fuel Company of Rosatom. In comparison with the TVSA-T fuel assemblies previously supplied to the Temelin NPP, the new modification add to higher economic efficiency of power plant operations.

TVSA-T.mod.2 assemblies are more robust and have a lower pressure drop, which also contributes to advanced operational behavior, TVEL states.

According to Senior Vice-President for Commerce and International Business of TVEL JSC Oleg Grigoriyev, Czech and Russian nuclear engineers were involved in introducing the new fuel modification at the power plant.

“We are committed to further supplies of modern and reliable nuclear fuel to Czech Republic, introducing the new design and modifications of fuel assemblies, including the ones for VVER-440 reactors, which would make the operations of the Czech nuclear power plants even more efficient,” Oleg Grigoriyev said.

TVEL supplies nuclear fuel for both units of Temelin NPP, powered by VVER-1000 reactors, under the current contract with ČEZ power company.


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TVEL Fuel Company of Rosatom incorporates enterprises for the fabrication of nuclear fuel, conversion and enrichment of uranium, the production of gas centrifuges, as well as research and design organizations. It is the only supplier of nuclear fuel for Russian nuclear power plants. TVEL Fuel Company provides nuclear fuel for 72 power reactors in 14 countries, research reactors in eight countries, as well as transport reactors of the Russian nuclear fleet. Every sixth power reactor in the world operates on fuel manufactured by TVEL.