137Cs SPECIFIC ACTIVITY IN AGRICULTURAL PRODUCTS OF BIOGEOCENOSES IN CENTRAL PARTS OF THE KRASNOYARSK REGION

The purpose of the study is to assess the radiation safety of agricultural products in agricultural landscapes with additional radiation load. The work provides a literature review on assessing the radiation safety of feed and livestock products produced in agrobiocenoses contaminated as a result of radiation accidents in the territories of the Russian Federation and the Republic of Belarus. The paper reflects the radioecological situation in the central parts of the Krasnoyarsk Region. The studies were conducted in the period 2016–2018 on the basis of the laboratory of the Federal State Budgetary Institution GCAS Krasnoyarskiy and the radiation monitoring laboratory SHANECO Siberia – a branch of JSC SHANECO Group JSC. In this work, based on a radioecological survey of agricultural landscapes in the central parts of the Krasnoyarsk Region, landscapes with anthropogenic pollution were identified, data on the specific activity of 137Cs in green and roughage harvested in hay-pasture agrobiocenoses of agricultural landscapes in the central parts of the Krasnoyarsk Region were obtained. The content of 137Cs in livestock products produced in agricultural landscapes with additional technogenic load was assessed. The content of 137Cs in the feed of agricultural landscapes with absorbed doses of 1.33 and 1.55 mGy/year exceeds the value of the specific activity of technogenic cesium in the Krasnoyarsk Region. In agricultural landscapes with additional technogenic pollution, the specific activity of the daily diet for 137Cs is higher than in the rest of the region. In agricultural landscapes with doses of 1.33 and 1.55 mGy/year, the content of 137Cs in feed does not reach the control levels established by instruction № 13-7-2/216; accordingly, radiation-safe feed is produced in the Krasnoyarsk Region. In agricultural landscapes with absorbed doses of 1.33 and 1.55 mGy/year, the specific activity of 137Cs in cow's milk was found to be exceeded, but the established content of technogenic 137Cs does not exceed the requirements of SanPiN 2.3.2.1078-01.