تجزیه و تحلیل الکترومغناطیسی برای خطوط انتقال در داخل کشتی از سیستم فعال سازی نوترون

Neutron activation system is one of the neutron diagnostic systems in ITER which measures total neutron flux and first wall neutron fluence. This system has several pneumatic tubes installed on the vacuum vessel to deploy the irradiation samples near the plasma. The pneumatic tubes, called as transfer lines, get eddy current induced during plasma disruption, leading to Lorentz force by interacting the background magnetic field. This paper presents the electromagnetic (EM) loads on the in-vessel components of NAS for various disruption scenarios. The EM loads were calculated with the finite element solver, ANSYS-EMAG. It is proposed that the transfer lines are electrically insulated from the vacuum vessel in order to mitigate the excessively high EM loads. The analysis results showed that the electrical insulation reduces the load by one order of magnitude.