Power companies PGE, Tauron, Enea and copper giant KGHM signed a letter of intent on the purchase of stakes in a special-purpose vehicle set up to build Poland's first nuclear power plant, the companies said in a statement.

Treasury Ministry wants a number of companies it controls to share the financial burden and the risks of the 50 billion-zloty investment, minister Mikolaj Budzanowski said Wednesday.

Poland's first n-power block could be launched in 2023 or 2024, Aleksander Grad, CEO of power group PGE's nuclear power unit PGE EJ1 told PAP Polish news agency on Wednesday.

General contractor for the n-power project will be selected in Q2 2015, Grad also said.