Conceptual design of solid-type Pb _x Li _y eutectic alloy breeding blanket for CFETR

Abstract As a key component of the Chinese Fusion Engineering and Test Reactor (CFETR), blanket is responsible for tritium breeding, neutron shielding energy conversion. Blankets can be classified into solid liquidaccording to form breeder. Among them, utilizes pebble beds as both breeder multiplier, it has been popular scheme due its advantages, such good material compatibility non-magnetohydrodynamic effects. However, usually adopts beryllium or an alloy (i.e. Be 12 Ti) multiplying neutrons, causing very high cost scarcity natural resources beryllium, this hinders development. In paper, novel utilizing PbLi eutectic was proposed make up above deficiency. Pb 83 Li 17 applied in liquid lowmelting point. kind have higher melting point by adjusting atomic ratio Pb/Li, thus used multiplier. Based on modular design CFETR, optimization radial layouts, Pb/Li packed structure are studied through neutronic thermal hydraulic analysis. The results indicate that solid-type x y satisfy requirement self-sufficiency, global breeding larger than 1.0. addition, cooling system retain maximum temperature at lower level without melting. Overall, feasible from perspective hydraulics, avoids using beryllium; thus, highly reduced.