田湾核电厂址事故后果评价中天气取样方案的比较研究  

COMPARATIVE STUDY OF WEATHER SAMPLING SCHEMES BASED ON MEASURING METEOROLOGICAL DATA OF TIANWAN NUCLEAR POWER PLANT

作　　者：胡二邦[1] 王寒[1] 辛存田[1] 

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《辐射防护》2005年第3期129-138,共10页Radiation Protection

摘　　要：本文基于田湾核电厂址1998年9月1日至1999年8月31日一整年的逐时气象数据、SF6实测扩散参数和评价区(40km×40km)各网格(2km×2km)人口分布等实测资料,对依据秦山、田湾核电厂址和惠安拟选核电厂址多年逐时气象数据统计分析后提出的五个天气取样候选方案,估算了某假想事故在评价区内造成的集体剂量,得到事故集体剂量余补累积概率分布函数(即CCFD曲线)。同时应用整年“逐时滑移”事故释放起始时刻方法计算了事故集体剂量的CCFD曲线,即“标准”CCFD曲线,并将五类天气取样候选方案获得的95%累积概率水平事故集体剂量值与由“标准”CCFD曲线得到的相应值作比较。结果表明,天气取样候选方案四最佳,此方案给出的95%累积概率水平事故集体剂量与由“标准”CCFD曲线得到的相应值的相对偏差仅为3%。The accident collective dose caused by a serious accident in the assessment region is calculated for 5 sets of altinate weather sampling schemes based on the following information of Tianwan nuclear power plant:hourly meteorological data during 1998-09-01 to 1999-08-31,diffusion parameters obtained from SF 6 tests,population distribution for each reseau(2 km×2 km)in the assessment region(40 km×40 km).The CCFD (Complementary Cumulative Frequency Distribution)curve of collective dose is obtained based on above calculating results.The “standard' CCFD curve of accident collective dose is also calculated using starting time of accident release “hour by hour' moving method in the same time.The 95% cumulative probability level accident collective dose for 5 weather sampling schemes are compared with those from “standard' CCFD curve.The result shows that the fourth one of weather sampling schemes is the best one because the relative error of 95% cumulative probability level accident collective dose between it and “standard' method is only about 3%.

关 键 词：核电厂址 事故后果评价 天气 比较研究 取样方案 1999年8月 集体剂量 候选方案 数据统计分析 概率分布函数 概率水平 1998年 气象数据 实测资料 人口分布 扩散参数 相对偏差 曲线 SF6 累积 标准 秦山 

分 类 号：TL364.4[核科学技术—核技术及应用]