Speaker
B. G. Hong
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.1057.pdf
Study on Optimal Configuration of a Tokamak Fusion System with Coupled
Analysis of Tokamak Plasma and a Radiation Transport
B. G. Hong
Chonbuk National University, 567 Baekje-daero, Jeonju-si, Jeollabuk-do, Korea 54896
New simulation method which couples a conventional tokamak plasma analysis and a radiation
transport analysis is developed. This simulation can incorporate both plasma physics and
engineering constraints on a tokamak fusion system self-consistently. Using this simulation, we
found not only plasma performance and system parameters, but also the optimal radial build of
the tokamak fusion system with the plasma physics and engineering constraints moderately
extrapolated from the constraints adopted in the design of International Thermonuclear
Experimental Reactor (ITER). In a low-aspect-ratio configuration, the minimum major radius to
produce a given fusion power was determined by the shielding requirements and the magnetic
field at the toroidal field (TF) coil. With a confinement enhancement factor H = 1.3, Q > 10 was
possible for fusion power greater than 1,000 MW with an aspect ratio of A = 1.5; however, Q >
10 was possible for fusion power greater than 2,000 MW with an aspect ratio of A = 2.0. In a
normal aspect ratio configuration, configuration with only an outboard breeding blanket does not
satisfy requirement on tritium self-sufficiency. The optimum system size to produce a given
fusion power is determined by the requirements on the shielding, tritium breeding and the
magnetic field at the toroidal field (TF) coil. With a confinement enhancement factor H = 1.3, Q
> 30 was possible for fusion power greater than 2,000 MW with an aspect ratio of A = 3.0;
however, Q > 30 was impossible with an aspect ratio of A = 4.0. The tritium breeding capability
of a low-aspect-ratio tokamak exhibited better performance since the number of fusion neutrons
that contributed to tritium breeding were larger than the case with a larger aspect ratio tokamak.
