论文部分内容阅读
目的通过对成都市2012-2014年地表γ辐射进行监测,了解近年来成都市地表γ辐射剂量率现状水平和分布,为放射事故预警及事态评估提供科学、全面的基础数据。方法使用6150AD-b/H型直读式γ辐射仪,按照布点方案,监测人群聚集区室外和室内的γ辐射剂量率,用SPSS进行数据分析。结果共有3 588个监测点,其中成都市室内1 053个点,室外2 535个点,室内γ辐射剂量率均值为89.7 n Gy/h,室外γ辐射剂量率均值为65.4 n Gy/h,不同路面道路中,花岗岩路面最高,均值为84.4 n Gy/h。成都市地表γ辐射所致居民人均年有效剂量当量0.57 m Sv,低于全国、全省和自身(1981-1984)水平。结论成都市地表γ辐射剂量率属于正常地表辐射水平。
Objective To monitor the surface gamma radiation from 2012 to 2014 in Chengdu and to understand the current situation and distribution of the surface gamma radiation dose rate in Chengdu in recent years and provide scientific and comprehensive basic data for early warning and assessment of radiation accidents. Methods The 6150AD-b / H direct-reading γ-ray radiometer was used to monitor the dose rate of γ-radiation in outdoor and indoor areas in population gathering area according to the distribution plan. Data were analyzed by SPSS. Results There were 3 588 monitoring sites in total, including 1 053 indoor indoors and 2 535 outdoor indoors. The mean indoor γ radiation dose rate was 89.7 n Gy / h, and the average outdoor γ radiation dose rate was 65.4 n Gy / h. Pavement road, the highest granite pavement, with an average of 84.4 n Gy / h. The per capita annual effective dose equivalent of 0.57 m Sv per inhabitant due to surface gamma radiation in Chengdu is lower than that of the whole country, the province and itself (1981-1984). Conclusion The surface gamma radiation dose rate of Chengdu belongs to normal surface radiation level.