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Ядерна фізика та енергетика
ISSN:
1818-331X (Print), 2074-0565 (Online) |
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Full text (ua) Analysis of long-term monitoring data around the area of localization of nuclear-hazardous clusters in the "Shelter" Object
O. V. Mykhailov*, M. V. Saveliev, A. O. Doroshenko
Institute for Safety Problems of Nuclear Power Plants, National Academy of Sciences of Ukraine, Chornobyl, Kyiv region, Ukraine
*Corresponding author. E-mail address:
o.mikhailov@ispnpp.kiev.ua
Abstract: The results of a comprehensive analysis of neutron flux density (NFD), gamma-radiation exposure dose rate (GDR), dynamics of concrete temperature and air humidity in the vicinity of nuclearly hazardous fuel-containing material cluster (NHC) in room 305/2 of the Chornobyl "Shelter" Object, are demonstrated. In line with the data obtained from the Nuclear Safety Monitoring System between 2017 and 2024, typical trends in the dynamics of NFD and GDR are established. Seasonal fluctuations in air humidity and concrete temperature collected by meteorological equipment and Expert Research System were also examined, and their partial influence on NFD dynamics at different monitoring points was highlighted. The correlation between measured parameters from weak to strong was identified, depending on the sensor location relative to the NHC area localization. A new insight into the spatial and temporal behaviour of radiation and thermal fields around NHC was obtained, which highlights the importance of continuous monitoring to ensure nuclear safety of the "Shelter" Object and demands that the research in this area should be continued.
Keywords: Chornobyl NPP, "Shelter" Object, nuclearly hazardous clusters, neutron flux density, gamma-radiation exposure dose rate, temperature, dynamics.
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