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Russian Federation
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Chelyabinsk State University (Senior Lecturer)
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Chelyabinsk State University, Chelyabinsk, Russia
Russian Federation
GRNTI 76.03 Медико-биологические дисциплины
GRNTI 76.33 Гигиена и эпидемиология
OKSO 14.04.02 Ядерные физика и технологии
OKSO 31.06.2001 Клиническая медицина
OKSO 31.08.08 Радиология
OKSO 32.08.12 Эпидемиология
BBK 51 Социальная гигиена и организация здравоохранения. Гигиена. Эпидемиология
BBK 534 Общая диагностика
TBK 5708 Гигиена и санитария. Эпидемиология. Медицинская экология
TBK 5712 Медицинская биология. Гистология
TBK 5734 Медицинская радиология и рентгенология
TBK 6212 Радиоактивные элементы и изотопы. Радиохимия
Purpose: Descriptive analysis of the distributions of organ/tissue doses for individuals exposed to radiation as a result of liquid waste releases into the Techa River by the Mayak Production Association (PA) in 1949–1956. Material and methods: The dosimetry system TRDS-2016D has been used to compute individual doses of external and internal exposures. TRDS-2016D databases include information on radionuclide intakes and dose rates in air for settlements located in the contaminated areas of the Techa River and the East Ural Radioactive Trace (EURT). Combining these village-average data with the residence history and age of a particular person, the system produces an individual scenario of external exposure and individual radionuclide intakes and then calculates corresponding external and internal doses from the Techa River and EURT. Available 90Sr-body-burden measurements and available information on individual household locations relative to the contaminated river have been used for refinement of individual dose estimates. Results: Individual doses have been calculated for 29,647 persons included in the Techa River Cohort (TRC). According to residence history data, 5,280 members of the TRC were additionally exposed due to residency in the EURT villages. The cohort-average dose for the majority of extra-skeletal tissues does not exceed 100 mGy, while for the red bone marrow (RBM) it is equal to 350 mGy. In addition to the doses from the Techa River and EURT, individual thyroid doses for TRC members exposed to the Mayak PA atmospheric 131I releases have been calculated in a separate computer program. The cohort–average thyroid dose is 210 mGy. Maximum doses (about 1 Gy to the majority of extra-skeletal tissues and over 7 Gy to the thyroid and RBM) are observed for the persons who lived in their childhood and adolescence in the upper Techa region at close distance to the Mayak PA. Conclusion: The TRC members were exposed to chronic radiation over a wide range of doses, but at low-to-moderate-dose rates. Estimates of absorbed doses can be used to analyze the dose dependences of the incidence of solid cancers and leukemias. This can make it possible to verify risk coefficients of low-dose-rate effects of ionizing radiation which can be used for radiation protection purposes.
dose reconstruction, Mayak Production Association, Techa river, East Urals Radioactive Trace, Strontium-90, Cesium-137, Iodine-131
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17. Degteva MO, Shagina NB, Shishkina EA, Vozilova AV, Volchkova AY, Vorobiova MI, et al. Analysis of EPR and FISH studies of radiation doses in persons who lived in the upper reaches of the Techa River. Radiat Environ Biophys. 2015;54:433-44. DOI:https://doi.org/10.1007/s00411-015-0611-8.
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20. Shishkina EA, Volchkova AYu, Degteva MO, Napier BA. Evaluation of dose rates in the air at non-uniform vertical distribution of gamma-emitting radionuclides in different types of soil. Radiation Safety Issues. 2016;(3):43-52. (Russian).
21. Hiller MM, Woda C, Bougrov NG, Degteva MO, Ivanov O, Ulanovsky A, Romanov S. External dose reconstruction for the former village of Metlino (Techa River, Russia) based on environmental surveys, luminescence measurements and radiation transport modelling. Radiat Environ Biophys. 2017;56(2):139-59. DOI:https://doi.org/10.1007/s00411-017-0688-3.
22. Degteva MO, Shishkina EA, Tolstykh EI, Vozilova AV, Shagina NB, Volchkova AYu, et al. Application of EPR and FISH methods to dose reconstruction for people exposed in the Techa River area. Radiation Biology. Radioecology. 2017;57:30-41. DOI:https://doi.org/10.7868/S0869803117010052. (Russian).
