Concentration ratios for chemical analogues of key nuclides for different vegetation types at the Olkiluoto site
| Autor: | A.T.K. Ikonen, Lasse Aro, J. Helin |
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| Rok vydání: | 2009 |
| Předmět: |
Radionuclide
Renewable Energy Sustainability and the Environment Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Sampling (statistics) Soil science Vegetation Vegetation types Nuclear Energy and Engineering Forest ecology Environmental science Nuclide Safety Risk Reliability and Quality Waste Management and Disposal Tree species |
| Zdroj: | Radioprotection. 44:553-558 |
| ISSN: | 1769-700X 0033-8451 |
| Popis: | Olkiluoto Island on the western coast of Finland has been selected as a repository site for spent nuclear fuel in Finland. This study aimed at identifying differences in concentration ratios (CR), and their distributions, for the elements analysed on soil and vegetation samples taken on the island (Al, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Ni, P, S, Zn). Many of the elements can be considered to be chemically analogous to radionuclides that, potentially, can be released from the repository. Differences between the soil and vegetation in different tree age, tree species and site fertility classes typical of the forest ecosystems in Olkiluoto were investigated. Lognormal distributions were fitted to the different groupings of the CR data calculated on the basis of the results from 94 sampling plots. In most cases no significant differences were found between the different groupings for a specific element when the 95% confidence intervals were applied. According to the results based on real site data for CRs in forest ecosystems on Olkiluoto, it appears that the current CR-based approach to radionuclide modelling in forest ecosystems is problematic due to the large variation in parameter values and in their practical definition. |
| Databáze: | OpenAIRE |
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