South Korea on Sunday reported one of its 20 nuclear reactors came to a halt due to a mechanical problem.
The Korea Hydro and Nuclear Power Corporation said one of its six nuclear reactors in the eastern coastal city of Uljin, 230 kilometres (140 miles) east of Seoul, stopped due to a malfunctioning turbine Sunday afternoon.
"It was a simple mechanical problem and there was no leak at all of any radioactive materials," an official at the Uljin power plant told AFP, adding he expected the reactor to resume operations on Monday.
He said the 950,000-kilowatt reactor was one of the oldest nuclear power facilities in South Korea.
The country's reactors meet 40 percent of its demand for electricity but it plans to build eight more by 2015.
