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Radiation Protection Dosimetry Advance Access originally published online on March 17, 2008
Radiation Protection Dosimetry 2008 130(4):434-441; doi:10.1093/rpd/ncn066
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Re-estimation of internal dose from natural radionuclides for Chinese adult men

Wu Quan, Zhu Hongda*, Fan Tiqiang and Liu Qingfen

Institute of Radiation Medicine, Chinese Academy of Medical Sciences, PO Box 71, Tianjin 300192, People's Republic of China

* Corresponding author: zhuhda{at}yahoo.com.cn

Received October 22, 2007, amended January 28, 2008, accepted February 6, 2008

Based on recent research, related literature data and updated model parameter values, the present internal radiation dose from intakes of radionuclides for Chinese adult men (except for radon and its short-lived decay products) has been re-estimated. Radiation doses obtained by using both direct and indirect approaches have been compared. It is shown that the total annual committed effective dose in Chinese men accounts for ~0.43 mSv, 43% higher than the world reference value. The average annual dose from 40K is quite near to the world reference value, but those from the 238U-series (with 235U-series) and 232Th-series are 2.1- and 3.2-fold higher, respectively. The dose by ingestion is about two orders of magnitude higher than that by inhalation. 40K is the greatest contributor to the total dose, while, in the decreasing order, 210Po, 210Pb, 228Ra and 14C are lower. Other radionuclides contribute very little dose (~2.6%). These results provide a useful basis for clarifying the characteristics of natural radiation exposure and for establishing related reference values for Chinese adult men.


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