Document Detail

Important factors governing exposure of the population and countermeasure application in rural settlements of the Russian Federation in the long-term after the Chernobyl accident.
MedLine Citation:
PMID:  11446125     Owner:  NLM     Status:  MEDLINE    
Rural settlements located in areas of the Russian Federation contaminated after the Chernobyl accident and exceeding an annual dose of 1 mSv a-1 have been classified according to 137Cs contamination density, internal dose and the neighbourhood of forests. It has been shown that, with the exception of the most contaminated areas, the internal doses decreased in accordance with a decline in 137Cs availability for plant root uptake. An inverse tendency was observed in areas with 137Cs contamination above 555 kBq m-2 which can be explained by a reduction or even termination of countermeasure application and by an increasing consumption of forest products in areas where restrictive countermeasures are still implemented. Twenty-seven settlements have been studied to estimate the effectiveness of countermeasures applied previously and to identify the most important factors governing the radiation exposure to the population and its change with time. It has been shown that the effectiveness of countermeasures which resulted in a decrease of up to 40% of doses has a tendency to decline in the long term. The need for continuation of remediation in rural settlements was evaluated both for selected settlements and extrapolated to the whole contaminated area and it has been shown that the application of countermeasures will be of importance at least up to the year 2045. Rather high effectiveness in terms of internal dose reduction (factor of 2-2.5) of radical improvement (disking, ploughing and reseeding) and administration of Cs binders to animals (Ferrocyn) was demonstrated for the selected settlements. It could be demonstrated that for forest-remote settlements there is a linear dependence between internal dose normalised to the density of contamination and the proportion of peat soils around settlements. For near-forest settlements, this dependence was less pronounced which can be explained by the high contribution of forest food products to the internal dose. Milk is still the major dose-forming product in rural Russian settlements (its contribution to internal dose in forest-remote settlements is above 70%); however, in near-forest settlements, the contribution of mushrooms to the internal dose is comparable to the contribution from milk.
S Fesenko; P Jacob; R Alexakhin; N I Sanzharova; A Panov; G Fesenko; L Cecille
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental radioactivity     Volume:  56     ISSN:  0265-931X     ISO Abbreviation:  J Environ Radioact     Publication Date:  2001  
Date Detail:
Created Date:  2001-07-11     Completed Date:  2001-12-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8508119     Medline TA:  J Environ Radioact     Country:  England    
Other Details:
Languages:  eng     Pagination:  77-98     Citation Subset:  IM    
Russian Institute of Agricultural Radiology and Agroecology, Kievskoe Shosse, 249020 Obninsk, Kaluga Region, Russia.
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MeSH Terms
Cesium Radioisotopes / analysis*
Environmental Exposure / analysis,  prevention & control*
Food Contamination, Radioactive / analysis*
Milk / chemistry*
Radiation Dosage
Radiation Protection / methods
Radioactive Hazard Release*
Rural Population*
Soil Pollutants, Radioactive / analysis*
Trees / chemistry
Reg. No./Substance:
0/Cesium Radioisotopes; 0/Soil Pollutants, Radioactive

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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