Current design and R&D progress of the Chinese helium cooled ceramic breeder test blanket system

Abstract

As the testing mockup of tritium breeding blanket for DEMO, the Chinese helium cooled ceramic breeder test blanket system (HCCB TBS) is under development by China and will be tested in ITER to verify key tritium breeding blanket technologies. After the approval of the conceptual design of the HCCB TBS by the ITER Organization in 2015, the design optimization and more research and development activities for the HCCB TBS have begun for the preliminary design. This paper gives an overview of the recent progress of the HCCB TBS development in China, including the design optimizations, material development, mockup fabrication and test facility construction.

Study on Multiphysics Coupling and Automatic Neutronic Optimization for Solid Tritium Breeding Blanket of Fusion Reactor

“…Figure 2 shows the CAD model of the latest design of CFETR [1] HCCB TBB [7]. It mainly consists of an armor (which prevents plasma sputtering), a first wall (FW), tritium breeder zones, neutron multiplier zones, caps, cooling plates (CP), a distribution plate, a shielding plate and a gathering plate.…”

“…is the average density of the i th tritium breeder region. The average density of the tritium breeder region and the atom density of 6 Li and 7 Li can be calculated as follows: ρ (18)…”

“…N 6 Li and N 7 Li are the atom densities of 6 Li and 7 Li, respectively; σ 6 Li and σ 7 Li are the cross-sections of the (n, T) reactions of 6 Li and 7 Li, respectively; Φ(r, E, t) is the neutron flux distribution; S plasma is the generation rate of fusion neutron in plasma. In brief, TBR represents the average atom number of tritium produced in the TBB for every fusion neutron consumed.…”

“…Li SiOA is the relative atomic mass of Li4SiO4; 6 Li A and 7 Li A are the relative atomic masses of6 Li and7 Li, respectively; 6 εLi and 7 εLi are the enrichment of6 Li and 7 Li, respectively.…”

“…SiO 4 is the density of Li 4 SiO 4 , and ρ Li and7 Li of the ith tritium breeder region, respectively; N 0 is Avogadro's number; A Li 4 SiO 4 is the relative atomic mass of Li 4 SiO 4 ; A 6 Li and A 7 Li are the relative atomic masses of6 Li and 7 Li, respectively; ε 6 Li and ε 6 Li are the enrichment of6 Li and 7 Li, respectively.…”