Assessment of radiation exposure of murine rodents at the EURT territories
| Autor: | Naum M. Lyubashevsky, V. I. Starichenko, Georgy Malinovsky, Ilia V. Yarmoshenko |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
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General Immunology and Microbiology business.industry QH301-705.5 General Neuroscience Biology Contamination sr-90 murine rodent General Biochemistry Genetics and Molecular Biology Radiation exposure Toxicology Internal dose Reference level radiation doses Activity concentration Dose assessment eurt Biology (General) General Agricultural and Biological Sciences Nuclear medicine business Dose rate environment contamination |
| Zdroj: | Open Life Sciences, Vol 9, Iss 10, Pp 960-966 (2014) |
| ISSN: | 2391-5412 |
| Popis: | The study provides data on contemporary levels of radiation exposure of organs and tissues of murine rodents (several species of mice and voles) inhabiting the East-Ural Radioactive Trace. The estimation procedure involves the most advanced approach based on application of appropriate voxel phantom and biokinetic model. Input data for dose assessment are the results of measurements of skeletal 90Sr activity concentration. Maximal internal dose to skeleton, accumulated during 45 days, is 303 mGy. Median internal dose rates on the last day before trapping were 0.83, 0.092 and 0.023 mGy/day for animals trapped at the sites with initial (1957) 90Sr surface contamination >37 MBq/m2, 18.5–37 MBq/m2 and 0.074–18.5 MBq/m2 respectively. Taking to account internal and external exposures, upper boundary of the ICRP Derived Consideration Reference Level (DCRL) is exceeded on the territory with maximal level of the initial 90Sr surface contamination. On the territory with 18.5–37 MBq/m2, whole body mean dose rates to murine rodents exceed the lower boundary of DCRL. On the areas with lower level of surface contamination, even the 90-th percentile of dose rate is below the DCRL. |
| Databáze: | OpenAIRE |
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