Title :
Three-dimensional analysis of nuclear heating in the superconducting magnet system due to gamma-rays from 16N in the ITER water cooling system of the shielding blanket
Author :
Iida, H. ; Plenteda, R. ; Santoro, R.T. ; Khripunov, V.
Author_Institution :
Garching Co-Center, ITER JCT, Garching, Germany
Abstract :
Detailed 3-D calculations have been conducted for estimating nuclear heating in cryo-temperature components by 16N gamma-rays emitted from blanket cooling water coming through upper ports of ITER. Total gamma-ray energy emitted by 16N in the cryostat is about 50 kW. Only 2.3% (1.1 kW) of the total energy is deposited in the cryo-temperature components. Local nuclear heat density in the superconductors and the absorption dose in the insulators are lower than design limits. Having an additional guard pipe around the cooling pipes may not be a strong requirement from a radiation shielding point of view
Keywords :
cryostats; fusion reactor blankets; fusion reactor design; fusion reactor ignition; fusion reactor operation; fusion reactor theory; gamma-ray effects; shielding; superconducting magnets; 1.1 kW; 3D analysis; 50 kW; 16N; H2O; ITER water cooling system; N; cryo-temperature components; cryostat; design limits; fusion reactors; gamma-rays; nuclear heating; radiation shielding; shielding blanket; superconducting magnet; upper ports; Coils; Cooling; Geometry; Magnetic analysis; Monte Carlo methods; Solid modeling; Superconducting magnets; Temperature; Uncertainty; Water heating;
Conference_Titel :
Fusion Engineering, 1997. 17th IEEE/NPSS Symposium
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4226-7
DOI :
10.1109/FUSION.1997.687755
