The Wolseong-3 reactor located in Gyeongju, 370 kilometers south of Seoul, went offline on Oct. 18 due to a problem in the coolant pump, the Nuclear Safety and Security Commission said.
|South Korea's nuclear commission (Yonhap)|
One of the components malfunctioned, leading to a coolant leakage, the commission said, adding that it has fully addressed the fault.
"The commission confirmed that the radiation level around the nuclear facility has remained constant at a normal level," it said.
Currently, South Korea operates 24 nuclear reactors, which generate about 30 percent of its electricity. (Yonhap)