14C content in vegetation in the vicinities of Brazilian nuclear power reactors
| Autor: | Iêda Gomes Nícoli, Kristina Stenström, Cíntia Melazo Dias, Roberto Ventura Santos, Göran Skog, Rosangela da Silveira Corrêa |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Health
Toxicology and Mutagenesis Mineralogy Atmospheric sciences law.invention Prevailing winds Nuclear Reactors law Nuclear power plant Environmental Chemistry Carbon Radioisotopes Waste Management and Disposal Geography business.industry Pressurized water reactor Radioactive waste General Medicine Vegetation Wind direction Nuclear power Pollution Plume Air Pollutants Radioactive Nuclear Power Plants Environmental science business Brazil |
| Zdroj: | Journal of Environmental Radioactivity. 99:1095-1101 |
| ISSN: | 0265-931X |
| DOI: | 10.1016/j.jenvrad.2007.12.025 |
| Popis: | in Undetermined C-14 specific activities were measured in grass samples collected around Brazilian nuclear power reactors. The specific activity values varied between 227 and 299 Bq/kg C. Except for two samples which showed C-14 specific activities 22% above background values, half of the samples showed background specific activities, and the other half had a C-14 excess of 1-18%. The highest specific activities were found close to the nuclear power plants and along the main wind directions (NE and NNE). The activity values were found to decrease with increasing distance from the reactors. The unexpectedly high C-14 excess values found in two samples were related to the local topography, which favors C-14 accumulation and limits the dispersion of the plume. The results indicate a clear C-14 anthropogenic signal within 5 km around the nuclear power plants which is most prominent along northeastwards, the prevailing wind direction. (Less) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect