不同核电厂址机械通风冷却塔雾羽大气扩散特征研究

发布时间：2018-03-27 11:18

本文选题：内陆核电厂　切入点：厂址环境　出处：《科技导报》2016年15期

【摘要】：机械通风冷却塔雾羽扩散是内陆核电厂重要厂用水系统环境影响评价时首要考虑的重要问题,直接影响核电厂机械通风冷却塔附近大气环境。以江西彭泽和吉林靖宇内陆核电厂址为研究对象,应用冷却塔环境影响评价模型SACTI模拟预测不同厂址、不同冷却塔设计和不同布局方案情景下机械通风冷却塔雾羽扩散特征,以确定不同厂址环境特征和冷却塔设计可能对机械通风冷却塔雾羽扩散产生的影响。结果表明,不同机械通风冷却塔设计情景下,一机四塔比一机两塔方案引起的雾羽扩散环境影响范围广,雾羽长度范围后者约为前者的2.1倍,雾羽高度范围后者约为前者的1.3倍。不同冷却塔布局方案情景下,一机两塔情景下线性排列和平行排列方案主要影响近场雾羽长度分布和高处雾羽高度分布,一机四塔情景下两种排列方案主要影响远场雾羽长度分布和低处雾羽高度分布。不同厂址情景下,一机两塔方案2个厂址雾羽扩散差异最大,一机四塔方案2个厂址雾羽扩散差异最小。
[Abstract]:The foggy plume diffusion of mechanical ventilation cooling tower is an important issue in environmental impact assessment of important plant water system in inland nuclear power plant. The atmospheric environment near the mechanical ventilation cooling tower of the nuclear power plant is directly affected. Taking the inland nuclear power plant sites of Pengze and Jingyu in Jiangxi Province as the research object, the environmental impact assessment model of the cooling tower SACTI is used to simulate and predict the different sites. The characteristics of spray plume diffusion of mechanical ventilation cooling tower under different cooling tower design and different layout scenarios were determined to determine the environmental characteristics of different plant sites and the possible influence of cooling tower design on the spray plume diffusion of mechanical ventilation cooling tower. In different design scenarios of mechanical ventilation cooling tower, the influence range of foggy plume diffusion environment caused by one machine's four towers is wider than that of one machine's two towers, and the length range of fog plume is about 2.1 times that of the former. The range of fog plume height is about 1.3 times of that of the former. Under different cooling tower layout scenarios, the linear arrangement and parallel arrangement in one and two tower scenarios mainly affect the distribution of the length of fog plume and the height of fog plume in the near field. Under one and four tower scenarios, two kinds of arrangement schemes mainly affect the distribution of far field fog plume length and low site fog plume height. Under different plant site scenarios, the difference of fog plume diffusion between one tower and two tower schemes is the greatest. The difference of foggy plume diffusion between two plant sites is the least.
【作者单位】：环境保护部核与辐射安全中心;河南科技学院资源与环境学院;
【基金】：国家科技重大专项(2013ZX06002001)
【分类号】：TM623.8;X771

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