广西某核电站周边地区龙卷风调查与评价  

Survey and Evaluation of Tornadoes around a Nuclear Power Plant in Guangxi

作　　者：何如[1,2] 唐忠莲 苏志[1,2] 林振敏[2] 

机构地区：[1]广西壮族自治区气象服务中心,广西南宁530022 [2]广西壮族自治区气候中心,广西南宁530022 [3]民航珠海空管站气象台,广东珠海519040

出　　处：《灾害学》2016年第1期153-156,169,共5页Journal of Catastrophology

基　　金：广西自然科学基金资助项目(2011GXNSFA018008)

摘　　要：龙卷风是核电站在选址和设计阶段需要考虑的最重要的极端气象参数之一。通过调查和收集广西某核电站周边300 km×300 km区域范围内1962-2012年的龙卷风资料,对龙卷风的时空分布、灾害特征、强度定级以及最大设计基准等级等进行了分析和评价。结果发现:龙卷风富士达风力等级集中出现在F0、F1级,最强龙卷风等级为F3级;主要分布在厂址附近和广东沿海一带,东北和西北部的内陆地区也时有发生;一年之中主要出现在春、夏两季,以4月最多;1 d之中白天比夜间多,傍晚18时段最多;推荐龙卷风设计基准等级为F3级,采用最大设计风速为75 m/s。Tornado which is one of the most important extreme meteorological parameters must be concerned during the nuclear power plant siting and designing stage. The temporal and spatial distribution,disaster characteristics,intensity gradation and the maximum design basis category for tornado wind velocity of tornado events around the nuclear plant of Guangxi Autonomous Region are analyzed and evaluated,based on the tornado data from the area of 300 km × 300 km around the nuclear power plant from 1962 to 2012. The results show that： the wind speed category of Fujita tornado scale is F0 or F1 mostly. The maximum of category is up to F3. The tornadoes are mainly distributed around the nuclear plant and coastal area of Guangdong. They also occur in the northeast and northwest of mainland occasionally. The tornadoes concentrated mostly in spring and summer,especially in April,and occurred frequently in daytime,especially from 18： 00 to 18： 59 at afternoon. The design basis standard wind speed category is F3（ Fujita tornado scale）,design maximum wind speed is 75 m / s.

关 键 词：核电站 龙卷风 强度分级 设计基准等级 时空分布 广西 

分 类 号：P445.1[天文地球—大气科学及气象学] X43[环境科学与工程—灾害防治]