Shielding Design Optimization for the Compact Ignition Tokamak Test Cell Building

Shielding optimization for the Compact Ignition Tokamak baseline test cell building design is performed to minimize the cost. The design is based on iterative calculations using one-dimensional S_N models calibrated to the results obtained by coupling a three-dimensional Monte Carlo model to a two-dimensional S_N model. These sophisticated models remove most conservative factors in the baseline design. When a low-sodium concrete is used as the base material, the boron concentration and the thicknesses are reduced substantially. The optimal configuration that satisfies all the shielding and structural requirements shows a cost reduction of ∼14% ($4.1 million) relative to the baseline design.