轻水堆乏燃料和钍燃料在ACR-700利用的探索

Investigation of Potential Utilization for Light Water Reactor Spent Fuel and Thorium Fuel in ACR-700

摘要: 轻水堆乏燃料和钍燃料的利用是解决乏燃料后处理问题和核燃料短缺的有效途径之一。本工作以ACR-700标准燃料为参考，研究了4种不同混合比例的轻水堆乏燃料及钍燃料在ACR-700中的k_∞和燃耗。研究结果表明，将裂变产物分离后，轻水堆乏燃料的重锕系核素在ACR-700中可作为一很好的燃料；只要加入足够的启动燃料，钍燃料也可作为很好的转换燃料，使反应堆内生成²³³U的速率大于易裂变燃料的消耗速率，²³³U的生成对反应堆运行后期维持临界起重要作用。

Abstract: The potential utilization of light water reactor (LWR) spent fuel and thorium fuel is a very efficient way for solving spent fuel processing and nuclear fuel shortage problems. Four different mixed fuel types with LWR spent fuel and Th fuel were researched in ACR-700 using SCALE5.1 code system. Compared with the ACR-700 standard fuel, the fuel cycle model 1 and 4 can reach higher burnup. According to the research on the lattice physics of ACR-700 fuel bundle, it is indicated that LWR spent fuel after separation of the fission products is a very prospective fuel in ACR-700 and ²³²Th can be a preferable fertile isotope if sufficient booster fuel is supplied.