Radioactive Aerosols within Conditions of the New Safe Confinement in 2017–2020

Autor: V. M. Bezmylov, O. K. Kalynovskyi, O. A. Svirid, A. V. Tkach, V. O. Kashpur, P. V. Sabenin, O. S. Lagunenko, V. Ye. Khan, V. P. Kovalchuk
Rok vydání: 2021
Zdroj: Nuclear Power and the Environment. 21:88-94
ISSN: 2311-8253
DOI: 10.31717/2311-8253.21.2.9
Popis: The results of monitored behavior of radioactive aerosols within the conditions of the New Safe Confinement (NSC) in 2017–2020 are presented. Maximum “unorganized” flux of beta-emitting products of the Chornobyl accident from the Shelter object through the process openings and leakages of light roofing in the NSC basic volume observed in 2017 made 7.9 kBq/(m2 ∙day). Mean annual density of radionuclide deposition onto the light roofing during four years has been changing within the range of 1.7–2.2 kBq/(m2 ∙day). Over these years, mean annual volumetric activity of sum of long-lived beta-emitting nuclides coming in the “Bypass” system dropped from 0.84 to 0.17 Bq/m3 . Their carriers were aerosol particles with activity median aerodynamic diameter, mainly, from 4.3 to 10 μm. The data are given on radioactive contamination of near-surface air layer in the NSC basic volume.
Databáze: OpenAIRE