Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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V. V. Kanivets¹, S. I. Kireev², G. V. Laptev¹, O. I. Nasvit³, S. M. Obrizan<sup>2

1</sup>Ukrainian Hydrometeorological Institute (UkrGMI), Kyiv, Ukraine
²State Specialized Enterprise "Chornobyl Nuclear Power Plant", Chornobyl, Ukraine
³National Institute for Strategic Studies, Kyiv, Ukraine

Abstract: Results of long-term observations on ¹³⁷Cs and ⁹⁰Sr concentration in water mass of the ChNPP Cooling Pond are presented. Drastic transformation of the intrinsic trend in changes with time of averaged radionuclides content in water is clearly demonstrated alongside with the spatial heterogeneity of radioactive contamination of water body. The cycling character of seasonal changes of ¹³⁷Cs activity concentration in water is being linked to hydrochemical, temperature and oxygen regimes of the Cooling Pond.

Keywords: сooling pond of ChNPP, water column, temperature and oxygen stratification, activity concentration of ¹³⁷Cs and ⁹⁰Sr in water, ecological half-lives, bottom sediments, pore solution, fuel particles.

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