玉屏厂址地区龙卷风参数估算与分析

利用玉屏核电站厂址周围3个经纬度区域范围内1950-2021年期间的龙卷风调查资料，采用富士达F等级划分法评定龙卷风级别，按照《核电厂厂址选择的极端气象事件（HAD101/10）》的规定，估算出核电站设计基准龙卷风相关参数和设计基准等级。结果表明：玉屏核电站厂址区域设计基准龙卷风最大风速估算值为63.9m/s（对应10-7概率值），总压降为29.5hPa，压降速率为7.1hPa/s，最大旋转风速为51.8m/s，最大平移速度为12.1m/s，设计基准等级为F2。计算结果为项目设计和建设提供重要理论参考依据。

Estimation and Analysis of Tornado Parameters around the Yuping Plant Site

Based on the tornado survey data in the three longitude and latitude regions around the Yuping Nuclear Power Plant site from 1950 to 2021, the tornado grade is assessed by using the Fujita scale method. The design basis tornado parameters and grade in the assessment area are calculated according to Extreme Meteorological Events for the Selection of the Nuclear Power Plant Site (HAD101/10). The results show that the recommended maximum wind speed of the design reference tornado around the Yuping Nuclear Power Plant site is 63.9m/s (corresponding probability value is 10-7), the total pressure drop is 29.5 hPa, the pressure drop rate is 7.1 hPa/s, the maximum rotating wind speed is 51.8 m/s, the maximum translation speed is 12.1 m/s, and the design reference grade is F2. The calculation results provide important theoretical reference for project design and construction.