Poland said its first nuclear power station will cost around $20 billion to build, days after the government announced it had picked US firm Westinghouse for the job.

The decision to choose Westinghouse over France's EDF and South Korea's KHNP was formally adopted at a cabinet meeting in Warsaw.

"We have opted for American technology... namely US firm Westinghouse," Morawiecki commented. "The approximate cost... will be up to around $20 billion," he said.

The EU member wants the power station in the northern village of Lubiatowo-Kopalino on the Baltic Sea coast to go online in 2033.

Poland plans to eventually host three nuclear sites with three reactors each, which would produce around 30% of the country's electricity needs.

Warsaw also signed a letter of intent for South Korea's KHNP to build a nuclear plant in Patnow, central Poland, based on its APR1400 technology.

Warsaw has been planning the nuclear program for years, but the question of energy security has taken on added urgency because of tensions with Russia over its invasion of Ukraine.

Nuclear power would also help Poland replace coal — which has accounted for up to 80% of its electricity generation — and reach its climate obligations.