The reactor core design requirements are introduced briefly, which resulted form load-following operation.The development and evolvement course of current PWR core are also introduced.

• 并以上述5大问题为基础，简要叙述了负荷跟踪运行给堆芯设计带来的有关设计问题，此外，简要介绍了当前压水堆堆芯的改进设计及演变过程。