Activation calculation for a Fusion-Driven sub-critical Experimental Breeder, FDEB

A design study of Fusion-driven sub-critical Experimental Breeder, FDEB is reported briefly. Using an activation calculation code FDKR and its associated data library AF-DCDLIB to calculate the radioactivity, decay heat, waste disposal rating and biological hazard potential from activation products, actinides and fission products in the FDEB. The codes and libraries used in calculation are introduced briefly, and calculation results and decay curves of related hazards after the shutdown of one-year operation of the FDEB are given. The activation features of five candidate structural materials were also evaluated for FDEB design. Detailed calculation and analyses of waste disposal rating and remote maintenance rating for all long-lived radio-nuclides were performed to identify the safety, environmental and radioactive waste characteristics of the FDEB design. Results obtained show that the total radioactivity inventory, decay heat and BHP at shutdown are 5.74x1013MBq, 8.34MW and 4.08x108km3 of air for 316SS structure material, respectively. The inventory of actinides important for the fuel reprocessing, such as 232U and 237Np was also investigated. It was shown that their low concentrations in FDEB appear to be manageable. (author)