Analysis of breeding and transmutation performance for a double-zone chloride salt fast reactor

Based on the core structure of molten salt actinide recycler and transmuter (MOSART), molten chloride salt Fast reactor (MCFR) was optimized. With the assistance of the analysis of the molten salt composition and reprocessing method, the burnup performance of MCFR improves significantly, although a gap still exists compared with the breeding and transmutation performance of the molten salt fast reactor (MSFR). Based on online continuous reprocessing, this study analyzes the influence of the core structure, ³⁷Cl enrichment to Breeding Ratio(BR), nuclide absorption rate, and burnup performance by using SCALE6.1 and Molten Salt Reactor Reprocessing Sequence (MSR-RS). Finally, this study proposes the design of the doublezone MCFR, which will further improve the breeding and transmutation performance and the thorium-based fuel utilization rate. The results show that it could shorten the doubling time to about 20 years, and increase the Transuranics(TRU)rate to approximately 68%. (authors)