Attila Aszodi said today the new reactors are expected to begin supplying electricity in 2025 and 2026.
The expansion of the Soviet-built plant in the city of Paks will be completed by Russia's state-owned Rosatom and is being financed mostly with a Russian loan of 10 billion euros (USD 10.7 billion).
Aszodi said the five reactors in Paks currently provide 36 percent of Hungary's electricity supply but have to be shut down between 2032 and 2037.
Critics say the project is too expensive and draws funding away from renewable energy sources.