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.
次欧洲聚变装置（NET）设计中，已考虑采用偏滤器。本工作包含两部分。第一部分，使用MCNP程序对穿过NET偏滤器管道的中子流进行了三维蒙特卡罗分析，并考察了设计修改的影响。分析采用了简化的等离子体模型（圆柱形），但对偏滤器管道进行了全细节模拟。结果表明，存在一种取决于偏滤器外板构型（角度）的流效应。第二部分，研究了偏滤器瓦片材料对穿过管道中子流的影响。所考察的材料包括316L不锈钢、碳、铍、铜、钨和钼。分析显示，在比较总通量时，各材料的流效应相似；然而，当考虑快中子通量分量时，不同材料之间出现了显著差异。在所有情况下，钼表现出最高的通量。最后指出，尽管等离子体模型较为简化（直圆柱模型），但该方法有助于识别主导流效应的设计及材料因素。