South Korea has stopped Tuesday operation of two of its 1,000-megawatt nuclear reactors because of unrelated system malfunctions, plant operators said, dpa reported.
A reactor at the Shingori plant near the southern city of Busan was shut down at 8:10 am (2310 GMT Monday) after a warning signaled a problem in the reactor's control system, officials said.
It is the first time that the reactor has been shut down due to a malfunction since it started commercial operation in February 2011.
Another reactor at Yeonggwang, 260 kilometers south of Seoul, went into automatic shutdown at 10:45 am (0145 GMT Tuesday) due to a malfunction.
The state-run plant operators said the two unrelated malfunctions involved no apparent risk of a radiation leak at either site.
More than 35 per cent of South Korea's electricity needs are met with 23 nuclear power plants in operation.