Bulgaria's only nuclear power plant was fully operational again Wednesday after technical problems at one of its two reactors were resolved, the operator said.

"The systems and installations of the 1,000-megawatt reactor are working normally, which was confirmed by conducting the necessary testing," a statement said.

The reactor had been disconnected from the national grid on Tuesday because of a generator control problem, three days after being reconnected following maintenance work. The operator said that there was no leakage of radiation.

Kozloduy originally had six reactors but four were mothballed in 2002 and 2006 as conditions for Sofia joining the European Union in 2007.

The plant still generates around 30 percent of Bulgaria's electricity. In March the government scrapped a deal with Russia's state-owned Atomstroiexport to build a new plant.

Parliament however debated on Wednesday whether to put a revival of the project to a referendum in the coming months.