Research of Natural Radioactivity Level and Environmental Impact Assessment in the Dadu River Region

摘要：

　　The main purpose of the article is to investigate the ecological environment problem of radioactive pollution of the Dadu river area in Sichuan.The gamma radiation dose rate from the natural radioactive level of groundwater were investigated and measured.Gamma energy spectrum was measured by gamma spectrometer.The gamma radiation absorbed dose rate is 65 (4.27~213.77) nGy/h.On the basis of groundwater sample analysis,we calculated the internal radiation dose caused by 238U,232Th and 226Ra through the dose calculation formula.The average year annual effective dose and annual collective effective dose were 0.00552mSv and 4.58Sv respectively in the survey area.It shows that the gamma radiation absorbed dose is in a low level compared with the public dose standard limit value,while the average annual effective dose is much lower than it.The result of the radiation dose rate in some individual fields is mainly caused by granite,and away from the residential area,it is not harmful to the living environment.

关键词： the Dadu River Natural Radioactivity Gamma Radiation Environmental Assessment

作者: Ma-li Peng Fa-cheng Yi De-jun Lai Hong-mei Zhong Hong Yuan

作者单位: Sichuan Institute of Nuclear Geology,Chengdu,China Southwest University of Science and Technology,Mian Yang,China

会议类型: 国际会议

会议名称: 3rd International Conference on Pollution Ecology(第三届污染生态学国际会议(3rd ICPE))

会议地点: 天津

会议语种:英文

页码: 51-54

在线出版日期: 2012-11-06（万方平台首次上网日期，不代表论文的发表时间）