All permits have been issued for the 330-tonne, more than 11-meter-high reactor vessels, Szijjártó said.

Hungary's National Atomic Energy Office (OAH) issued the implementation license to expand the Paks nuclear power plant in August.

Russia's Rosatom is the general contractor for the Paks II project to add two more blocks at the plant, Hungary's sole commercial source of nuclear power.

The target date for putting the two new blocks online is 2030.