Speaker
Dong-Seong Park
(National Fusion Research Institute)
Description
The nuclear fusion research is in progress for the next generation energy source in many countries. The Korea Superconducting Tokamak Advanced Research (KSTAR) in Korea, the Experimental Advanced Superconducting Tokamak (EAST) in China and the Wendelstein7-X in German are the operational superconducting fusion device in the world. The International Thermonuclear Experimental Reactor (ITER) is in construction under the international collaboration between China, EU, India, Japan, Korea, Russia and the USA and it will be completed the construction until the mid of 2020’s. Above listed fusion devices are consisted of low temperature superconductor and have to be operated at the liquid helium temperature. To achieve cryogenic temperature for the superconducting fusion device, the large cryogenic helium plant is necessary and the efficient cool-down procedure should be required.
The KSTAR device is fully superconducting (SC) tokamak that consists of 16 Toroidal Field (TF) magnets and 14 Poloidal Field (PF) magnets. The KSTAR SC magnets are made of Nb3Sn and NbTi and its cold mass is around 30 tons. A helium refrigeration system (HRS) with 9 kW @ 4.5K had been installed to keep the KSTAR SC magnets at appropriate temperature condition and it has been operated successfully since 2008. As a result of cool-down optimization by the KSTAR cryogenics personnel based on the operational experience, the elapsed time for cool-down of the KSTAR SC magnets has been reduced.
In this paper, the result of KSTAR cool-down and warm-up since 2009 will be presented and the operation parameter of the KSTAR HRS during the cool-down and warm-up will be analyzed and discussed.
Co-authors
Chul-Hee Lee
(National Fusion Research Institute, Daejeon, South Korea)
Dong-Seong Park
(National Fusion Research Institute, Daejeon, South Korea)
Hee-Jae Ahn
(National Fusion Research Institute, Daejeon, South Korea)
Jae-Joon Joo
(National Fusion Research Institute, Daejeon, South Korea)
Kyung-Mo Moon
(National Fusion Research Institute, Daejeon, South Korea)
Nak-Hyung Song
(National Fusion Research Institute, Daejeon, South Korea)
Nam-Won Kim
(National Fusion Research Institute, Daejeon, South Korea)
Sang-Woo Kwag
(National Fusion Research Institute, Daejeon, South Korea)
Yaung-Soo Kim
(National Fusion Research Institute, Daejeon, South Korea)
Yong-Bok Chang
(National Fusion Research Institute, Daejeon, South Korea)
Young-Ju Lee
(National Fusion Research Institute, Daejeon, South Korea)
