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Restart of S Korea’s aging nuclear reactor sparks controversy via AsiaOne

South Korea’s decision to extend the life of its second-oldest nuclear power plant until 2020 has triggered controversy, with residents and civic groups expressing concerns over its safety.

The Nuclear Safety and Security Commission, the country’s nuclear watchdog, said Friday that seven of its nine commissioners had voted to restart the 678-megawatt Wolsong unit 1 reactor in Gyeongju, North Gyeongsang Province.

The heavy water reactor shut down in 2012 after reaching the end of its 30-year lifespan.

The state-run Korea Hydro and Nuclear Power, which operates the reactor, welcomed the approval, and announced its plan to restart operations in April.

“The Wolsong unit 1 reactor has gone through a thorough safety inspection over the past five years,” Cho Seok, chief executive of the KHNP, said during a press conference at the company’s headquarters on Friday.

The operator, part of the state-run Korea Electric Power Corp., has been seeking to restart Wolsong unit 1, and runs 23 reactors, producing about a third of South Korea’s power.

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Korea’s environmental civic group Collective Action for Nuclear Free Society called for the reactor’s life-span extension to be nullified.

“The NSSC pushed ahead with the voting amid fierce controversy over the Wolsong unit 1 reactor’s safety problems, as it failed to meet technical standards set by the International Atomic Energy Agency,” the group’s spokesperson said.

In October, the state-run Korea Institute of Nuclear Safety completed an inspection of the reactor, and concluded that the unit was suitable for operation only until November 2022 as long as certain engineering improvements were made.

However, the NSSC delayed its decision, saying more opinions on seismic risk were required.

The NSSC must officially renew the license before the owner, the KHNP, can continue generating electricity.

Those who approved the restart said the reactor was safe to generate electricity as the KHNP made a 560 billion won (S$694 million) investment to upgrade it.

They also warned of an electric power supply problem should the Wolsong unit 1 be permanently shut down.

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