关键词: 声学, 自然通风冷却塔, 噪声预测, 核电厂, 噪声治理, 非居住区

Abstract:

By comparing and analyzing the noise measurement results of natural ventilation cooling tower in a thermal power plant and the the guideline（HJ2.4-2009）mode, it is shown that the recommended model is applicable to the noise attenuation law of cooling tower. Based on the background that large natural ventilation cooling towers are adopted in the planning inland nuclear power plants in our country, the noise influence of natural ventilation cooling towers in a planned nuclear power plant is predicted and analyzed by using the recommended model, which shows that the noise of the plant boundary is beyond the standard of regulations. The main noise control measures of cooling tower are summarized, and the requirements of environmental protection regulations for nuclear power plants to set up a certain range of exclusion area are discussed. It is put forward that the boundary of exclusion area can be set as "virtual fence" for noise control of natural ventilation cooling tower in nuclear power plant, instead of taking the traditional factory boundary (land acquisition boundary) as the noise control standard. Combining with the distribution of sensitive points around the plant and the monitoring results of trial operation period, the viewpoint of technical, economical, reasonable and feasible noise reduction scheme is adopted. It can not only avoid the drawbacks of "one size fits all" in environmental protection, but also meet the environmental protection needs of the actual development of enterprises.