超高通量快中子研究堆核燃料概念设计研究

Increasing neutron fluence rate is the development trend of high flux research reactor, which can greatly accelerate the R&D process of reactor materials. However, if the neutron fluence rate is increased to 10¹⁶ cm⁻²·s⁻¹, the peak power density will be several times higher than that of the existing research reactor, which will bring many challenges to the reactor and nuclear fuel design. For this reason, this paper semi quantitatively analyzes the impact of increasing neutron fluence rate on the performance of nuclear fuel from neutronics, heat transfer, fuel material behavior in the reactor and other aspects, and proposes design measures to meet the challenges of ultra-high flux and power density, providing guidance for the development of ultra-high flux fast neutron research reactor fuel design.