Speaker
Sunil Pak
(National Fusion Research Institute)
Description
In ITER the neutron activation system deploys several foil samples close to the plasma to measure the neutron fluence and the fusion power. These samples are transferred in a pneumatic way along the tubes installed on the vacuum vessel wall. Therefore, the tubes, namely transfer lines, get eddy current induced during plasma disruption, leading to Lorentz force by interacting the background magnetic field. As the transfer lines are routed along the poloidal direction of the vacuum vessel, we considered not only the poloidal field variation, but also the toroidal field variation and the halo current for calculating the electromagnetic (EM) load. The analysis results showed that the unbearable loads take place on the tube. In order to mitigate the EM loads, the transfer lines are electrically insulated from the vacuum vessel. It was shown from the EM analysis that the electrical insulation reduces the load by one order of magnitude.
Co-authors
Chang Rae Seon
(National Fusion Research Institute, Daejeon, South Korea)
Hyeun Gon Lee
(National Fusion Research Institute, Daejeon, South Korea)
Krasilnikov Vitaly
(ITER Organization, St. Paul-lez-Durance, France)
Luciano Bertalot
(ITER Organization, St. Paul-lez-Durance, France)
Mun Seong Cheon
(National Fusion Research Institute, Daejeon, South Korea)
Sunil Pak
(National Fusion Research Institute, Daejeon, South Korea)
Young Hwa An
(National Fusion Research Institute, Daejeon, South Korea)
