The paper researched the model and simulation of pwr nuclear power plant and found the basis for the research and simulation of " ads " . the paper mainly include : 1 . the modeling of main component of the pwr nuclear power plant main circuit system and established the suitable teaching system ' s physics - mathematics modeling for microcomputer simulation 本文研究了压水堆核电站系统的建模和仿真问题,初步完成了pwr核电站物理运行的pc机教学仿真演示平台系统,同时为“加速器驱动洁净核能系统” ( ads )的基础研究成果演示与仿真奠定基础。