压水堆核电站实心燃料堆芯向环形燃料堆芯过渡方案研究

Study on Transition from Solid Fuel Core to Annular Fuel Core in PWR Nuclear Power Plant

为深入研究环形燃料和实心燃料混合装载的问题,论证在大型商用压水堆核电站应用环形燃料可行性,采用堆芯燃料管理程序包CMS对秦山二期2号机组堆芯开展堆芯燃料管理计算,设计一个由秦山二期2号机组实心燃料堆芯逐步向全堆芯装载环形燃料过渡的堆芯换料方案,计算分析各循环的循环长度、焓升因子、热点因子和慢化剂温度系数等堆芯物理参数,计算结果表明各循环堆芯物理参数均满足设计要求,可见压水堆核电站实心燃料堆芯是可以过渡到环形燃料堆芯。

In order to study the mixed loading of annular fuel and solid fuel in depth and demonstrate the feasibility of using annular fuel in large commercial pressurized water reactor nuclear power plant, core fuel management is calculated for the long period reactor core of unit 2 of Qinshan Phase II by the core fuel management package CMS. A core refueling plan is designed to transition from unit 2 of Qinshan Phase II solid fuel core to full-core annular fuel loading. The core physical parameters such as cycle length, hot channel factor, hot spot factor and moderator temperature coefficient of each cycle are calculated and analyzed. The calculation results show that the physical parameters of each cycle core meet the design requirements, and it can be seen that the solid fuel core of PWR nuclear power station can be transitioned to the annular fuel core.