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针对棒元件正方形栅格组件,进行均匀混合钍-铀燃料中子学分析。分析表明:钍-铀燃料能够使组件反应性随燃耗变化曲线更平缓,非常有利于提高反应性控制能力。在此基础上,以紧凑型压水堆为对象,进行钍-铀燃料长寿期堆芯方案概念设计研究并进行评价。计算表明:堆芯燃耗寿期可达到1000等效满功率天(EFPD),235U利用率可达到51.3%。研究表明:紧凑型压水堆应用钍-铀燃料,是实现长寿期设计的重要技术途径之一。
A uniform mixed thorium-uranium fuel neutron analysis was performed for the bar element square grid assembly. The analysis shows that the thorium-uranium fuel can make the component reactivity curve more gradual with the burnup, which is very helpful to improve the reactivity control ability. Based on this, the concept design of long-life core of thorium-uranium fuel is studied and evaluated based on compact PWR. Calculations show that the core burn life can reach 1000 equivalent full power days (EFPD), 235U utilization rate can reach 51.3%. The research shows that the application of thorium-uranium fuel to compact pressurized water reactor is one of the important technical ways to realize long-life design.