Bulgaria's Energy Ministry sent a formal letter to state-owned Russian company Rosatom, inviting experts from the energy giant to the country, the ministry's press office says.
Minister Temenuzhka Petkova cited the need to set up the parameters and composition of a working group on the Belene nuclear power plant project.
The move to form the working group was agreed by Bulgarian Prime Minister Boyko Borisov and Russian President Vladimir Putin
The project, which was to be carried out by Russian company Atomstroyexport, was abandoned in 2012.
In June, however, an arbitration forced Bulgaria to pay €550 million for a nuclear reactor and other equipment already manufactured for the plant.
The head of the EU executive body, Jean-Claude Juncker, said Bulgaria must notify the European Commission if it decides to build a new nuclear reactor, as it is stipulated in the Euratom Treaty.
