AbstractIn the design of the Next European Torus (NET), a poloidal divertor has been considered. The present work consists of two parts. In the first part, a three dimensional Monte Carlo analysis of neutron streaming through the NET divertor duct was performed using the MCNP code. The effect of design modifications was also examined. The analysis used a simplified plasma model (cylindrical), but simulated the divertor duct in full detail. The results indicated a streaming effect that depends on the configuration (angle) of the outside divertor plate. The second part of this work examined the effect that the divertor tile material has on streaming through the divertor duct. The materials examined included Stainless Steel 316L, carbon, beryllium, copper, tungsten, and molybdenum. The analyses showed that when total flux was compared, the streaming for all materials was similar; however, when one considered the fast flux component of the streaming neutrons, significant differences between materials emerged. In all cases molybdenum showed the highest fluxes. Finally, it is noted that, although the plasma model was simplistic (straight cylindrical model), this approach helped to identify the design and material aspects that dominate the streaming behavior.
Statistical study of particle flux footprint widths with tungsten divertor in EAST