| Abstract: | Detailed neutronics analysis on a tokamak fusion experimental reactor was performed. Neutronics responses of components in the vacuum vessel of a swimming pool type reactor were calculated by Monte Carlo method considering toroidal geometry, asymmetrical torus cross section, and neutron source distribution in plasma. It was found that the neutronics responses in the first wall and the blanket vary significantly in the poloidal direction. Effect of penetrations of neutral beam injectors on the tritium breeding performance was also evaluated in the analysis. The result shows that the effect is rather small in the present structure. As a result of the analysis, it becomes clear that modification of blanket structure and material composition should be done in order to improve the tritium breeding performance and to reduce the nuclear heating rate of the vacuum vessel in the divertor zone. |
