Changes in Radiation Exposure Rate of Fish of the Cooling Pond of the Chornobyl NPS and Lake Azbuchyn after Water Level Lowering

Author:

Kaglyan O. Ye.,Gudkov D.I.,Belyaev V. V.,Kireev S. I.,Yurchuk L. P.,Drozdov V. V.,Pomortseva N. A.,Pryshliak S. P.,Gupalo O. O.,Abramiuk I. I.,Men’kovska M. O.

Abstract

Changes in the absorbed dose rate of external and internal exposure of the representatives of fish fauna of the cooling pond of the Chornobyl NPS and Lake Azbuchyn after the interruption of water supply into the cooling pond at the end of 2014 were investigated in 2014-2021. Changes in hydrological regime resulted in the decrease in water level in the cooling pond by 6.5-7.0 m, whereas in Lake Azbuchyn - by 2.5-3.0 m. In this case, <sup>90</sup>Sr concentration activity in the water and biota increased. It has been found that in 2021 dose load from the incorporated <sup>90</sup>Sr on fish of the cooling pond increased on the average by a factor of 4.5, whereas in Lake Azbuchyn - by a factor of 7.5 as compared to previous period (prior to a decrease in water level). The external dose rate for fish of the cooling pond remained almost unchanged, whereas in Lake Azbuchyn it increased as a result of replacing littoral and sub-littoral zones of the lake with the sections of the bottom characterized by an essentially higher level of radio-nuclide contamination.

Publisher

Begell House

Subject

Water Science and Technology,Aquatic Science,Ecology

Reference28 articles.

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2. Gudkov, D.I., A.Ye. Kaglyan, S.I. Kireev et al. 2008. Main dose-forming radionuclides in fish of the exclusion zone of the Chornobyl NPS. Radiatsionnaya Biologiya. Radiobiologiya 48(1): 48-58. [Rus.]

3. Kaglyan, O.Ye., D.I. Gudkov, S.I. Kireev et al. 2021. Dynamics of 90Sr and 137Cs specific activity in representatives offish fauna of water bodies of the exclusion zone of the Chornobyl NPS. Yaderna Fizyka ta Energetyka 22(1): 62-73. [Ukr.]

4. Kaglyan, A.Ye., D.I. Gudkov, V.G. Klenus et al. 2012. Radionuclides in aboriginal fish species of the exclusion zone of the Chornobyl NPS. Yaderna Fizyka ta Energetyka 13(3): 306-315. [Rus.]

5. Kuzmenko, M.I., D.I. Gudkov, S.I. Kireev et al. 2010. Tekhnogenni radionuklidy u prisnovodnykh ekosystemakh. (Technogenous radionuclides in freshwater ecosystems.) Kyiv, Naukova Dumka Press. 262 pp. [Ukr.]

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