熔盐堆临界与7Li丰度变化的核安全分析

Background]: Molten salt reactor is one of the six internationally recognized and recommended fourth generation reactors , which is different from conventional solid-state nuclear fuel reactors. It is necessary to analyze the relationship between 7Li abundance and nuclear critical parameters in order to do a good job in core design management and nuclear safety supervision. [Purpose]: This study modeled a molten salt reactor with reference to engineering practice, and used software simulation calculations to analyze the impact of different 7Li abundance fuel salts on the reactivity of the molten salt reactor, and to analyze the changes in nuclear critical parameters. [Methods]: By iterative calculation, quickly and accurately find the 7Li abundance value at the critical state of the molten salt reactor core. [Results]: The final conclusion is that the reactivity of the molten salt reactor increases with the increase of fuel salt 7Li abundance, and the rate of change in reactivity of the molten salt reactor is also related to 7Li abundance. [Conclusions]: Based on the analysis results of this study, conduct in-depth exploration, summarize relevant management requirements from the perspective of laws and regulations, and propose key points for attention from the perspective of review and management.