Abstract
Tritium breeding blanket (TBB) is an essential component in a fusion reactor, which has functions of tritium breeding, energy generation, and neutron shielding. Tritium breeding ratio (TBR) is a key parameter to evaluate whether the TBB could produce enough tritium to achieve the tritium self-sufficiency (TBR >1) for fusion reactor. Current codes or software are hard to meet the requirements of high efficiency, high resolution, and high automation for neutronic optimization of TBB. In this article, the application of the density perturbation calculation on a solid breeder TBB was first performed. Then, the method of the geometry perturbation calculation based on the virtual density theory was studied. Results and comparison analysis indicate that the 1st + 2nd-order neutronic perturbation calculations (including the density perturbation and the geometry perturbation) results are consistent with the transport results under a perturbation of −15% to +15%. It is proven to be valid to use the perturbation calculation for rapid TBR enhancement study of the solid breeder TBB.
Highlights
The tritium breeding blanket (TBB) is an essential component to achieve the tritium production, energy generation, and extraction in the fusion reactor
A helium-cooled ceramic breeder (HCCB) Tritium breeding blanket (TBB) typical module based on the latest design of China Fusion Engineering Test Reactor (CFETR) HCCB blanket (Wang et al, 2019; Qu et al, 2020) was selected for the neutronic analysis and the verification of the density perturbation calculation
The geometry perturbation calculation can be adopted for the solid breeder TBB of the fusion reactor for the rapid neutronic optimization based on the virtual density theory
Summary
The tritium breeding blanket (TBB) is an essential component to achieve the tritium production, energy generation, and extraction in the fusion reactor. The solid breeder TBB is an important alternative for a demonstration fusion reactor (DEMO) or a fusion power plant. The tritium selfsufficiency is a significant goal, and the tritium breeding ratio (TBR) is a key parameter to evaluate whether the TBB can produce enough tritium to achieve the tritium self-sufficiency for fusion reactor, which could be calculated as follows: (Wan et al, 2017; Zhuang et al, 2019)
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