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Two Nuclear Reactors Shut Down In South Korea

By Countercurrents.org

05 November, 2012

South Korea has shut down two nuclear reactors. Last month, authorities temporarily shut down two 1,000-megawatt reactors at separate nuclear plants after system malfunctions which were also blamed for another reactor at Yeonggwang being tripped into automatic shutdown in July.

Japan Today reported [1]:

South Korea has been forced to shut down two nuclear reactors on November 5, 2012 to replace components provided with fake quality certificates, a minister said, warning of “unprecedented” power shortages to follow.

Knowledge Economy Minister Hong Suk-Woo stressed that the “non-core” components posed no safety threat and were unrelated to a string of systems malfunctions at reactors this year that triggered calls for a safety review.

The two affected units at the Yeonggwang nuclear complex in the southwest may have to remain offline until early January, as engineers replace more than 5,000 fuses, cooling fans and other parts provided by eight suppliers.

“Comprehensive safety check-ups are necessary at these two reactors where the uncertified parts were used extensively,” Hong said.

“It’s inevitable that we will experience unprecedented power shortage during the coming winter with the two reactors shut,” he added.

South Korea operates 23 nuclear power reactors which meet more than 35 percent of the country’s electricity needs. It plans to build an additional 16 reactors by 2030.

The government has vowed to stick to its nuclear power program despite public concerns arising from last year’s nuclear disaster in Japan.

If the two Yeonggwang reactors are not brought back online as scheduled, Hong warned of a “dramatic” drop in national power reserves to 300,000 kilowatts in January, compared to the government target of 4.5 million kilowatts.

“Energy authorities are preparing a super-intense power supply emergency plan, which will be carried out in mid-November,” he said, without elaborating.

All parts supplied for use in South Korea’s nuclear plants require quality and safety warranties from one of 12 international organizations designated by Seoul.

The eight suppliers cited by Hong faked 60 warranties covering nearly 7,700 items that had been provided at a cost of $750,000, Hong said.

Of the total, more than 5,200 parts have been used in five reactors—99% of them in the two Yeonggwang units closed on November 5, 2012.

Doubts over nuclear safety standards were fueled in May when five senior engineers were charged with trying to cover up a potentially dangerous power failure at South Korea’s oldest nuclear plant.

The five, including a chief engineer at the Gori-1 reactor, were accused of violating a law on nuclear safety.

The reactor, built in 1978 near the southern city of Busan, briefly lost mains power on Feb 9 and the emergency generator failed to kick in. The power cut caused cooling water to stop circulating.

A BBC report [2] said:

Some parts in the nuclear reactors used had not been properly vetted, an official says.

They included fuses, cooling fans and power switches that did not have the required nuclear industry certificates.

"Comprehensive safety check-ups are necessary at these two reactors where the uncertified parts were used extensively," the Knowledge Economy minister said.

While none have posed a public risk, opposition to the government's bid to vastly expand its nuclear industry has been growing, says the BBC's Lucy Williamson in Seoul.


[1] “S Korea shuts nuclear reactors, warns of power shortages”, Nov. 05, 2012, http://www.japantoday.com/category/world/view/s-korea-shuts-nuclear-reactors-warns-of-power-shortages

[2] “South Korea shuts nuclear reactors over unapproved parts”, Nov. 5, 2012, http://www.bbc.co.uk/news/world-asia-20202354




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