百万千瓦级压水堆核电站长燃耗堆芯钆可燃毒物优化研究

Burnable Poison Optimization Study for Mega kW PWR Nuclear Power Plant Long Cycle Core

对百万千瓦级参考核电站长燃耗堆芯（１８个月换料）采用的可燃毒物（钆）含量与堆芯燃料管理主要结果进行了分析研究。该研究采用先进的燃料管理程序系统，对不同可燃毒物含量和不同可燃毒物棒根数的燃料组件进行了计算，给出了组件无限增殖因子（ｋｉｎｆ）随燃耗的变化关系，据此对参考堆芯采用相同的装载进行了４种方案燃料管理计算。计算结果表明，对于堆芯燃料管理，采用低可燃毒物含量、含可燃毒物棒数多的装载方案明显优于高可燃毒物含量、含可燃毒物棒少的堆芯装载方案。

The relationship between the content of the burnable poison (Gd)and the main results of the in core fuel management for the Mega kW PWR nuclear power plant long cycle core (18 month reload) is analyzed using the advanced fuel management design code package.The fuel assemblies of the various contents of the burnable poison and the various number of the burnable poison rod are calculated,and the infinite multiplication factor versus burnup for different assemblies is given out.Accordingly this,the results of four fuel management schemes are calculated.The results show that the scheme which uses lower content of burnable poison and more poison rods is better than that uses higher content of burnable poison and fewer poison rods.