| Autor: |
Romanyukha, A. A., Degteva, M. O., Kozheurov, V. P., Wieser, A., Jacob, P., Ignatiev, E. A., Vorobiova, M. I. |
| Zdroj: |
Radiation & Environmental Biophysics; Oct1996, Vol. 35 Issue 4, p305-310, 6p |
| Abstrakt: |
During 1949-1956, about 76 × 10 m of radioactive liquid waste containing a total activity of 10 Bq was discharged into the Techa River by the first Russian industrial nuclear facility Mayak. As a consequence, the population living in the river valley received considerable internal and external radiation doses. The results of a first application of electron paramagnetic resonance (EPR) of tooth enamel for a retrospective individual dose evaluation of the residents of the Techa riverside are presented. Three main contributions to the dose absorbed in tooth enamel have been considered: external exposure mainly from the Techa River sediments, internal exposure mainly due to Sr; and background radiation including all other sources of exposure except the Techa River. The teeth of 86 inhabitants of the town Kamensk-Uralskii were analysed to determine the age-dependent contribution of the background radiation to the enamel dose. For 22 residents of the middle and lower Techa riverside, measurements of the Sr whole-body content and EPR measurements of the absorbed dose in enamel were used to establish a correlation between these two quantities. Finally, absorbed doses in the enamel of five residents of the upper Techa riverside were determined by the EPR method. Contributions of the background radiation and the internal Sr contamination were subtracted to determine the external exposure of the residents. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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