跨间交混格架对EPR堆芯DNBR裕量的影响

摘要

采用FLICAⅢ-F子通道程序,分析了AFA 3GLE燃料组件加装跨间交混格架(MSMG)后对台山EPR堆芯热工参数和最小DNBR的影响.分析结果表明,在名义工况下加装MSMG后,轴向功率呈余弦分布和轴向功率偏差AO=+9％将分别提高EPR堆芯的DNBR裕量约为24％和28％,同时增加EPR堆芯压降约10.1％.%hydraulic parameters and minimum DNBR was analyzed by employing FLICA Ⅲ-F subchannel code. The results show that DNBR margin of EPR core can be improved respectively about 24% and 28% for normal condition with cosine and AO equal to +9% power distributions by adding 4 MSMGs on AFA 3GLE fuel assembly, while the pressure drop in EPR core increases about 10.1%.