秦山Ⅱ期核电站采用环形燃料LBLOCA研究

Study on LBLOCA of Qinshan Phase Ⅱ Nuclear Power Plant Project Loaded With Annular Fuel

摘要: 环形燃料是一种采用双层包壳和环形芯块内外冷却的新型压水堆燃料，与传统的棒状燃料相比，新的结构形式使环形燃料具有更好的安全性能。秦山Ⅱ期核电站被选用为参考电站，对装载环形燃料元件的秦山Ⅱ期核电站进行大破口失水事故（LBLOCA）研究，并将环形燃料堆芯的计算数据与棒状燃料堆芯的比较。结果表明，采用环形燃料的核电站在事故过程中具有更好的安全性能。

Abstract: The annular fuel that cooled internally and externally is a new PWR fuel which consists of two cladding and annular pellets. The annular fuel has more safety performance for new structure. Qinshan Phase Ⅱ Nuclear Power Plant project was selected to analyze large break loss of coolant accident (LBLOCA) as the reference plant. The results show that the plant loaded with the annular fuel is more safe than that loaded with the solid fuel during LBLOCA.