THE RESULTS OF RADIOECOLOGICAL MONITORING OF AGROECOSYSTEMS IN THE VICNITY OF KURSK NPP
2018
V.K. Kuznetsov | Isamov, N.N. | Sidorova, E.V. | Geshel, I.V. | Andreeva, N.V. | Sanzharov, A.I.
The paper presents the results of radioecological monitoring of agroecosystems situated in the vicinity of Kursk NPP. The article describes the goals, objectives, objects, controlled parameters, procedures and methods of observation. The specific activity of 137Cs which was detected in soils of agricultural lands in the observation zone of Kursk NPP averages of 23.3±15.1 Bq kg-1. The concentration of 90Sr ranges from 1.2 to 11.3 Bq kg-1. Radionuclides of induced activity (54Mn, 59Fe, 60Co), as well as 131I and 134Cs were not detected. The maximum accumulation of radionuclides was detected for natural grasses and leguminous crops, the minimum was for vegetable crops. Even at these cases the content of 137Cs in vegetables is 930-7270 times lower the standard values. The calculations showed that due to consumption of food produced in 5-km zone of Kursk NPP, the following annual activities enter the diet of residental population: 63 Bq a-1 of 90Sr and 195 Bq a-1 of 137Cs. This is approximately 400 times lower than annual entrance limit (AEL) for 137Cs and more than 20 times lower than AEL for 90Sr. These AELs are defined in RSS-99/2009. The main contribution of ingestion of 137Cs with the diet is made by milk (46,2%), meat (28.7%), potatoes and vegetables (14.2%), and for 90Sr – by milk (13.5%), plant products – 75.8%.
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