超临界水冷堆MOX燃料组件控制棒特性研究  

New MOX Fuel Assembly Control of SCWR

作　　者：王锋[1,2] 徐晗 张晗 任琦颀 周小为[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030 [2]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400030

出　　处：《核科学与工程》2017年第6期1039-1044,共6页Nuclear Science and Engineering

基　　金：中央高校基本科研业务费科研专项(CDJZR10140010)

摘　　要：超临界水冷堆(SCWR)因具有较高的热效率和较强的经济竞争性等优势引起许多国家和地区的广泛关注。MOX燃料即普通燃料UO_2与PuO_2的混合陶瓷燃料替换UO_2会给SCWR堆芯安全带来一定的不确定性。因而MOX燃料组件的反应性控制与普通燃料有较大差异。论文采用MCNP5软件对SCWR采用传统核燃料与MOX燃料组件的控制棒控制性能进行了分析和对比,结果表明:MOX燃料组件中子能谱硬化,控制棒中硼(B)的丰度越大,控制棒直径越大,其控制效果越理想。控制棒对径向功率峰抑制效果明显,而对轴向功率分布影响较小。计算结果对压水堆新型MOX燃料组件控制棒设计有一定参考意义。Because of its high thermal efficiency and strong economic competitiveness and other advantages, super-critical water-cooled reactor （SCWR）aroused wide interests in many countries and regions. Replacement of UO2 by MOX fuel,which is a mixture of UO2 and PuO2 will bring uncertainties to SCWR core safety. Reactivity control of the MOX fuel assembly is quite different with that of the ordinary fuel. In this paper, MCNP5 software is used to analyze and compare the control rods of traditional nuclear fuel and MOX fuel in SCWR module. Results show that the MOX fuel has a hardening neutron energy spectrum, the greater the abundance of B in the control rod and the larger the diameter of the rod,the better effect of the control rod. The radial power peak is inhibited, while it has little effect on the axial power distribution. Results are useful for the design of a new MOX fuel assembly control system.

关 键 词：超临界水冷堆 MOX燃料 控制材料 燃料组件 物理分析 

分 类 号：TL48[核科学技术—核技术及应用]