Radioactivity Investigation in Liyang City,Jiangsu Province
Lin Jingyong;Wang Xiao;Nuclear Industry Geological Brigade No.272;Nuclear Industry Geological Brigade No.247;
The measurement results of surface gamma radiation dose rate,atmospheric radon concentration,and natural radionuclide contents in soils/rocks and water in Liyang City,Jiangsu Province,are presented. It indicates that the surface gamma radiation dose rate averages 78 nGy/h,and is above normal in Liyang volcanic basin periphery and the outer reaches of Miaoxi granite contact zone,with a maximum of 800 nGy/h. The mean concentration of atmospheric radon is 14. 5 Bq/m~3. The average content of natural radionuclide contents in soils/rocks is ~(40)K ~(226)Ra ~(238)U ~(232)Th,and 6,0. 085,17. 1 and 212 mBq/L in water,respectively. The total α,total β level in water is 0. 028 and 0. 146 Bq/L. The public dose arising from natural background is 1.175 mSv/a per capita in the region.