紧凑型压水堆钍-铀燃料长寿期堆芯物理特性研究  

Research on Physical Properties of Long Life Core Using Thorium-Uranium Fuel

作　　者：郑洪涛[1] 夏榜样[1] 肖鹏[1] 李松岭[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2015年第3期1-5,共5页Nuclear Power Engineering

摘　　要：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。The neutronics characteristics of the square assembly that employs the homogenous thorium-uranium fuel have been analyzed and evaluated, and the numerical results show that the infinite multiplication factor of fuel assembly decreases more slowly with the increasing bumup. In other words, better reactivity performance could be provided, from the neutronics point of view, this is very good for the increasing of the reactivity control ability. On the basis of these above, the conceptual design of the long-life core using thorium-uranium fuel has been developed. The obtained physical design parameters show that its lifetime can reach up to 1000 equivalent full power days, the utilization ratio of 235U is 51.3%. The physical properties analyses presented that it is a very effective method to achieve the long-life core loading schemes for the use of thorium-uranium fuel in compact pressurized water reactors.

关 键 词：钍-铀燃料 长寿期堆芯 物理特性 反应性控制 紧凑型压水堆 

分 类 号：TL329.2[核科学技术—核技术及应用]