液态熔盐热堆燃料管理方法研究与分析

Study and Analysis on Fuel Management Method of Liquid Molten Salt Thermal Reactor

摘要: 为研究液态熔盐热堆的燃料管理性能，需解决复杂堆芯结构的均匀化、燃料的混合及在线后处理3个问题。本文基于确定论程序DRAGON5与DONJON5，开发了液态熔盐热堆的燃料管理程序LMSR，并进行了验证。使用LMSR对液态熔盐热堆进行计算与分析，结果显示使用²³⁵U与²³⁸U启堆，加入燃料为²³²Th与²³³U条件下，后处理提取重金属的效率至少需要90%。此外，为维持堆芯有效增殖因数在1.0～1.005之间，加入的燃料中²³³U平均等效质量富集度在40%附近。

Abstract: In order to study the fuel management performance of liquid molten salt thermal reactor, there are three challenges needed to be solved that are homogenization of complex core structure, mixing of fuel salt and online fuel reprocessing. Based on DRAGON5 and DONJON5 codes, a liquid molten salt thermal reactor fuel management code LMSR was developed and verified. Liquid molten salt thermal reactor was calculated and analyzed by using LMSR. The results show that when ²³⁵U and ²³⁸U are used to start the reactor and ²³²Th and ²³³U are used as feeding fuel, the extraction efficiency of heavy metal is at least 90%. In addition, in order to maintain the core effective multiplication factor between 1.0-1.005, the average equivalent mass enrichment of 233U in the feeding fuel is about 40%.