Document Detail


A mathematical model for the behaviour of Se-79 in soils and plants that takes account of seasonal variations in soil hydrology.
MedLine Citation:
PMID:  22327104     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Se-79 is a long-lived radionuclide of potential radiological significance in relation to the deep geological disposal of solid radioactive wastes. In the context of release to the terrestrial environment, its main radiological impact is delivered through food chain pathways. Therefore, its accumulation in soils and uptake by plants is an important consideration in post-closure safety assessment studies. However, representation of its behaviour in the soil-plant system requires consideration of the multiple valence states that it can exhibit under different redox conditions and its susceptibility to volatilisation. A simple model is described that includes seasonal variations in soil hydrology and their effects on the mobility and root uptake of Se-79. Illustrative calculations are undertaken with the model, to demonstrate its capabilities for interpreting experimental data on the behaviour of Se-79 in soils and plants, and for making projections on the long-term behaviour of Se-79 transported to soils.
Authors:
D Pérez-Sánchez; M C Thorne; L M C Limer
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-10
Journal Detail:
Title:  Journal of radiological protection : official journal of the Society for Radiological Protection     Volume:  32     ISSN:  1361-6498     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809257     Medline TA:  J Radiol Prot     Country:  -    
Other Details:
Languages:  ENG     Pagination:  11-37     Citation Subset:  -    
Affiliation:
Radiological Protection of the Public and Environment, CIEMAT, Avenida Complutense 22, 28040, Madrid, Spain.
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