中文摘要：

为了深入理解核电蒸汽发生器传热管的点蚀,发展了利用元胞自动机（CA）模型模拟点蚀过程。元胞自动机的4个基本元素由电化学反应,化学反应和扩散过程决定。模拟结果通过定性和定量的方式与试验和已有文献进行了对比。结果显示：元胞自动机模拟能够较好的模拟出点蚀的萌生和亚稳态扩展过程,得到了点蚀坑的形状、腐蚀电流密度和Cl-对点蚀的影响,这些结果对蒸汽发生器传热管的结构完整性预测有重要影响。

英文摘要：

In order to deeply understand the pitting corrosion in Steam Generator（SG） tubing of a pressure water reactor, a Cellular Automata（CA） model was developed to simulate the pitting corrosion. The four basic elements of CA model were determined to simulate the electrochemical reactions, chemical reactions and diffusion processes. The results were qualitatively and quantitatively compared with the experimental and analog data quoted from literatures. Based on the simulation, the shapes of pitting corrosion, the corrosion current density and the effect of Cl- on pitting corrosion can be obtained, all of which are important for predicting the structural integrity of steam generator tubing.