Analysis on fuel cycle schemes in the dual-cooled waste transmutation blanket for the FDS-I

The fusion-driven subcritical system (FDS-I) which consists of the fusion neutron driver with feasible and easy-achieved plasma parameters and the multifunctional subcritical blanket (DWT) was proposed as an intermediate step toward the final application of fusion energy. In this contribution, fuel configuration and chemical form to be adopted in the FDS-I and possible fuel cycle schemes are clarified and analyzed based on the general survey. The influences of initial fuel loadings on the fuel cycle parameters are presented. Optimal analysis on the in-pile operation length is discussed and some recommendations are given to guide the design of optimized fuel cycle scheme on the basis of comprehensively considering the balance of the spent fuel loadings and the transmutation capacity.