Abstract
The article presents characteristics of the plant cover at the “Aktan-Berli” site including the content of natural (40K, 232Th, 226Ra) and artificial (137Cs, 90Sr, 241Am, 239+240Pu, 3Н) radionuclides. It has been found that the plant cover of the site is represented by ecosystems of high Kazakh hammocks bordering on ecosystems of lowlands in the west and ecosystems of ancient alluvial and modern alluvial plains. The content of free-water 3Н (FWT) and organic constituent (OBT) is below the detection limit of the methodological instrumentation in use (<8 Bq/kg). The concentration of natural radionuclides is typical, especially for Kazakhstani soil. The range of 90Sr activity concentration in plants range from <0.7 to 6.7 Bq/kq, 137Cs – from <0.6 to 1.1 Bq/kg, the content of 241Am and 239+240Pu are below the detection limit in most cases (<0,2 Bq/kg). Values of the radiation dose rate of plants are below the accepted international criteria. In general, the content of radionuclides in the plant cover of the “Aktan-Berli” site is significantly below the maximum permissible levels of radioactive contamination of forage plants posing no hazard when using the territory of interest for economic activities.
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