North Korea claimed yesterday that its scientists succeeded in creating a nuclear fusion reaction, but experts doubted the country actually had made the breakthrough in the elusive clean-energy technology.
Fusion nuclear reactions produce little radioactive waste — unlike fission, which powers conventional nuclear power reactors — and some hope it could one day provide a virtually limitless supply of clean energy. US and other scientists have been experimenting with fusion for decades, but it has yet to be developed into a viable energy alternative.
North Korea’s main newspaper, however, reported that its own scientists achieved the feat on the occasion of the “Day of the Sun” — a North Korean holiday marking the birthday of the country’s late dynastic founder, Kim Il-sung, last month.
Often, North Korea’s vast propaganda apparatus uses the occasions of holidays honoring Kim or his son, current leader Kim Jong-il, to make claims of great achievements that are rarely substantiated.
North Korean scientists “solved a great many scientific and technological problems entirely by their own efforts ... thus succeeding in nuclear fusion reaction at last,” the Rodong Sinmun newspaper said in a report carried yesterday by the North’s official Korean Central News Agency.
Experts, however, doubted the North’s claim.
“Nuclear fusion reaction is not something that can be done so simply. It’s very difficult,” said Park Hye-on, a physics professor at Postech, a top science and technology university in South Korea.
Park, who conducts fusion research in South Korea, said the North may have succeeded in making a plasma device and produced plasma, a hot cloud of supercharged particles — only one preliminary step toward achieving fusion.
He said outside experts need to know the scale of the experiment and method of generating plasma to assess the details of the North’s claim.
South Korea is one of a seven-nation nuclear fusion consortium to build the International Thermonuclear Experimental Reactor, or ITER in Cadarache in southern France by 2015. Other members include China, the EU, Japan, Russia, India and the US.
The aim of ITER is to demonstrate by 2030 that atoms can be fused together inside a reactor to efficiently produce electricity.
Current forms of nuclear power do the opposite, harnessing the energy released from splitting atoms apart.
A South Korean official handling nuclear fusion at the Ministry of Education, Science and Technology said the North appeared to have conducted only a basic experiment.
The official said the fusion has nothing to do with making nuclear bombs and said he could not make any further comment. He asked not to be identified because he was not authorized to speak to media.
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