Comparison of radwaste volume and hazard in liquid wall and conventional solid wall concepts

In this paper, we quantitatively assess the advantages offered by thick liquid wall (LW) concepts over conventional solid wall (SW) concepts in terms of the substantial reduction in radiation damage as well as activation to solid structure with subsequent reduction in radwaste volume and hazard. The conventional SW FW/blanket considered is made of Li/V with a peak neutron wall load of 5 MW/m² (3.5 MW/m² ave.) and is compared to a thick liquid lithium with a peak neutron wall load of 10 MW/m² (7 MW/m² ave.). "Fixed Radii" and "Fixed Fusion Power" configurations are considered. To have a consistent comparison, the two blankets were optimized first such that adequate tritium breeding ratio is obtained and the same level of magnet protection against radiation damage is reached.