Ecological half-life of I-131 in milk after dry and wet radionuclide deposition due to the Chernobyl accident
| Autor: | T. Jesko, A. Bratilova, I. A. Zvonova, S. Sarycheva, M. Fomintceva |
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| Rok vydání: | 2009 |
| Předmět: |
Radionuclide
Renewable Energy Sustainability and the Environment business.industry Health Toxicology and Mutagenesis Radioactive fallout Public Health Environmental and Occupational Health Half-life Contamination Deposition (aerosol physics) Nuclear Energy and Engineering Environmental chemistry Radioactive contamination Environmental science Precipitation Safety Risk Reliability and Quality Nuclear medicine business Waste Management and Disposal |
| Zdroj: | Radioprotection. 44:731-734 |
| ISSN: | 1769-700X 0033-8451 |
| DOI: | 10.1051/radiopro/20095133 |
| Popis: | Numerous measurements of 131 I concentration in milk following the Chernobyl accident have shown a wide range of clarification half-life values. By results of spectrometric measurements of the milk, performed in 1986 in Tula region (Russia), a connection between a 131 I decreasing half-life in milk and a level of radioactive contamination in a locality and a level of precipitation during passage of a radioactive cloud is analysed. Values of the 131 I half-life in milk increase from 3.0 d at the smallest area contamination by 137 Cs to 5.5–6.0 d at the contamination above the 200 kBq/m2 . The half-life of 131 I removal from milk depends on the precipitation level at the time of radioactive fallouts in places of milk sampling. Tef increases from 2.8–3.5 d (dry deposition) to the value 5.5–6.0 with precipitation increasing up to 6–9 mm. The half-life value does not change with further precipitation increase. This finding should be taken into account in thyroid dose estimations for inhabitants of contaminated areas. |
| Databáze: | OpenAIRE |
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