Document Detail

Estimation of internal radiation dose to the adult Asian population from the dietary intakes of two long-lived radionuclides.
MedLine Citation:
PMID:  15381318     Owner:  NLM     Status:  MEDLINE    
Daily dietary intakes of two naturally occurring long-lived radionuclides, 232Th and 238U, were estimated for the adult population living in a number of Asian countries, using highly sensitive analytical methods such as instrumental and radiochemical neutron activation analysis (INAA and RNAA), and inductively coupled plasma mass spectrometry (ICP-MS). The Asian countries that participated in the study were Bangladesh (BGD), China (CPR), India (IND), Japan (JPN), Pakistan (PAK), Philippines (PHI), Republic of Korea (ROK) and Vietnam (VIE). Altogether, these countries represent more than 50% of the world population. The median daily intakes of 232Th ranged between 0.6 and 14.4 mBq, the lowest being for Philippines and the highest for Bangladesh, and daily intakes of 238U ranged between 6.7 and 62.5 mBq, lowest and the highest being for India and China, respectively. The Asian median intakes were obtained as 4.2 mBq for 232Th and 12.7 mBq for 238U. Although the Asian intakes were lower than intakes of 12.3 mBq (3.0 ug) 232Th and 23.6 mBq (1.9 ug) 238U proposed by the International Commission on Radiological Protection (ICRP) for the ICRP Reference Man, they were comparable to the global intake values of 4.6 mBq 232Th and 15.6 mBq 238U proposed by the United Nation Scientific Commission on Effects of Radiation (UNSCEAR). The annual committed effective doses to Asian population from the dietary intake of 232Th and 238U were calculated to be 0.34 and 0.20 microSv, respectively, which are three orders of magnitude lower than the global average annual radiation dose of 2400 microSv to man from the natural radiation sources as proposed by UNSCEAR.
G V Iyengar; H Kawamura; H S Dang; R M Parr; J W Wang; Perveen Akhter; S Y Cho; E Natera; F K Miah; M S Nguyen
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental radioactivity     Volume:  77     ISSN:  0265-931X     ISO Abbreviation:  J Environ Radioact     Publication Date:  2004  
Date Detail:
Created Date:  2004-09-21     Completed Date:  2005-01-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8508119     Medline TA:  J Environ Radioact     Country:  England    
Other Details:
Languages:  eng     Pagination:  221-32     Citation Subset:  IM    
Nutrition and Health-Related Environmental Studies Section, Division of Human Health, International Atomic Energy Agency, P.O. Box 100, 1400 Vienna, Austria.
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MeSH Terms
Asia, Southeastern / epidemiology
Asia, Western / epidemiology
Diet Surveys*
Far East
Food Analysis
Food Contamination, Radioactive / analysis*
Radiation Dosage
Risk Assessment
Thorium / analysis*,  standards
Uranium / analysis*,  standards
Reg. No./Substance:
7440-29-1/Thorium; 7440-61-1/Uranium

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