The plume dispersion from mechanical ventilation cooling towers is an important issue in the environmental assessment of the essential service water system of an inland nuclear power plant, which affects the atmosphere environment around the mechanical ventilation cooling tower. Taking the nuclear power plant sites in Pengze, Jiangxi and Jingyu, Jilin as examples, this study simulates the plume dispersion from the mechanical ventilation cooling tower in different sites, for different cooling tower designs and in different layout scenarios by applying the SACTI model. The effects of different site environmental characteristics and different layouts on the plume dispersion are determined. It is shown that among different design scenarios of the mechanical ventilation cooling tower, the environment impact region of the plume dispersion for the case of four towers is larger than that for the case of two towers. the plume length of the former is 2.1 times of that of the latter and the plume height of the former is 1.3 times of that of the latter. Among different layout scenarios of the cooling tower, the linear layout and the parallel layout for the case of two towers mainly impact the distributions of the near field plume length and the high plume height. However, they impact the distributions of the far field plume length and the low plume height for the case of four towers. Among different nuclear power plant sites, the difference between the two sites is the largest for the case of two towers and it is the least for the case of four towers.

inland nuclear power plant  /  site environment  /  cooling tower design  /  air diffusing