Artificial Sun's 'Plasma Collapse' Blocked by Ice Particles
[Asia Economy Reporter Junho Hwang] A technology to mitigate the collapse of ultra-high-temperature plasma that can occur during the operation of the International Thermonuclear Experimental Reactor, known as the artificial sun on Earth, has been developed by domestic researchers.
The National Fusion Research Institute verified the 'plasma collapse mitigation technology' to prevent damage to the International Thermonuclear Experimental Reactor (ITER) on the Korean artificial sun KSTAR on the 28th.
Plasma collapse mitigation technology is a technique that safely dissipates the vast energy of ultra-high-temperature plasma in a short moment when an abnormal situation occurs during fusion reactor operation, preventing damage to the device. If ultra-high-temperature plasma exceeding 100 million degrees suddenly collapses, an enormous amount of energy is released at once, causing serious damage to the fusion reactor.
The Fusion Research Institute developed and verified on KSTAR a technology that disperses energy by injecting fine ice particles at high speed using dozens of Shattered Pellet Injection (SPI) devices. In particular, it was confirmed that when two SPIs are installed symmetrically, the collapse mitigation efficiency significantly increases compared to using just one. It was also found that this technology blocks the occurrence of 'runaway electrons,' which abnormally accelerate during plasma collapse and cause severe damage to the device.
Based on this achievement, the Fusion Research Institute plans to develop technologies capable of responding to various plasma collapse scenarios.
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Meanwhile, ITER is a mega international collaborative R&D project jointly developed and constructed by seven leading fusion countries?Korea, the United States, the EU, China, Japan, Russia, and India?to demonstrate the feasibility of large-scale fusion energy production.
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