Title :
Natural Radioactivity Levels in the Pearl River Delta Economic Zone of Guangdong, China
Author :
Song, Gang ; Tang, Zeping ; Yue, Yumei ; Chen, Diyun
Author_Institution :
Guangzhou Higher Educ. Mega Center, Guangzhou, China
Abstract :
The paper presents the preliminary results of natural radiation measurements in high radiation background areas of the Pearl River Delta Economic Zone (PRDEZ) in Guangdong, China. The results indicated that outdoor absorbed dose rate from cosmic radiation range is 55.7-88.7 nGy/h, and the average is 68.2 nGy/h. Outdoor absorbed dose rate from terrestrial gamma radiation range is 22.6-522 nGy/h, and the average is 137 nGy/h in PRDEZ. The highest absorbed dose rate-522 nGy/h is found in Conghua. Average indoor and outdoor radon level in PRDEZ is 30.5 and 11.2 Bq/m3. Average radon content in water-tap water in 12 cities is 6.2 Bq/L; hot spring water is 120.6 Bq/L. Radon content in soil range is 35820-817180 Bq/m3, and the average is 20146 Bq/m3. Average radionuclide contents of 238U, 226Ra, 232Th and 40K in PRDEZ soil are 137.6, 136.7, 175.3 and 700.7 Bq/kg, respectively. Zhongshan and Taishan County have the highest average 232Th contents in soil.
Keywords :
dosimetry; natural radioactivity hazards; radioactive pollution; radioactivity measurement; radon; river pollution; soil pollution; water pollution measurement; 226Ra; 232Th; 238U; 40K; China; Conghua; Guangdong; Pearl River delta economic zone; Taishan; Zhongshan; cosmic radiation; hot spring water; natural radiation measurement; natural radioactivity level; outdoor absorbed dose rate; soil radon content; tap water; terrestrial gamma radiation; Area measurement; Cities and towns; Detectors; Environmental economics; Gamma rays; Humans; Ionizing radiation; Magnetic field measurement; Rivers; Soil measurements;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163098
