针对山地丘陵海岸地区核电厂近区污染物的流动扩散开展了风洞实验。以Nemoto准则作为动力相似的判据，对厂址周边复杂的地形地貌以及厂区内建筑物进行1∶800的缩比模拟。通过使用热线风速仪二维热线探头进行流动测量实验，采用60路同步自动化示踪测量系统开展示踪实验，对采集到的核电厂近区流场信息和浓度场信息进行整理分析。结果表明，风向、山体和建筑物会共同作用于区域流场，使得流场的空气动力学特性产生显著改变；建筑物尾流区的高度为上游山体高度的2.1 ~ 2.7倍，长度为上游山体高度11 ~ 30倍；排放高度的增加，使得地面最大扩散因子降低了29.1 ~ 62.5倍，出现的下风距离延长了480 ~ 1 000 m。

The wind tunnel experiments were conducted to investigate the transport and dispersion of pollutants in the near-field area of nuclear power plants situated in mountainous hilly coastal regions. Based on the Nemoto criterion as the criterion of dynamic similarity, the complex topography around the site and the buildings in the plant area were simulated in a scale of 1∶800. The flow measurement experiment was carried out by using the two-dimensional hot-wire probe of the hot-wire anemometer, and the tracer experiment was carried out by using the 60-channel synchronous automatic tracer measurement system. The collected near-field flow field information and concentration field information of the nuclear power plant were sorted out and analyzed. The results show that the wind direction, mountains and buildings will act on the regional flow field together, which makes the aerodynamic characteristics of the flow field change significantly. The height of the building wake region is 2.1 ~ 2.7 times that of the upstream mountain height, and the length is 11 ~ 30 times the mountain height. The increase in emission height reduces the maximum ground-level dispersion factor on the ground by 29.1 to 62.5 times, and extends the downwind distance by 480 to 1 000 m.