¹³⁷Cs IN THE ORGANISMS OF MOUSE-LIKE RODENTS INHABITED THE AREA OF NUCLEAR WEAPON TESTING

The paper presents the results of researching ¹³⁷Cs radionuclide concentration in the organisms of mouse-like rodents (organisms of jerboa (Allactaga major Kerr and Allactaga saltator Eversmann) and marmots (Citellus erythrogenus Brandt)) living in the field of nuclear-weapon testing at the Semipalatinsk test site and the parameters of ¹³⁷Cs radionuclide transition to organisms of studied animals. It is revealed that relatively elevated magnitudes of ¹³⁷Cs activity concentration in organisms of jerboa and marmots are observed on the assumption of their residence in local contamination sites. With venturing from contamination sites at the distance exceeding the radius of animal activity, high values of radionuclides’ activity concentration are not reported. Despite the fact that animals live in the environment which components display high activity concentration of radionuclides, the extremely high concentration of radionuclide in these animals’ organisms has not identified.

The midpoint measures (AM±SD) of CR_muscl of ¹³⁷Cs radionuclide for the muscle tissue of Allactaga saltator Eversmann amounted (2.1±1.3)×10⁻³ (n-11), for muscle tissue of Allactaga major Kerr – (4.7±2.7)×10⁻³ (n-9), for the muscle tissue of Citellus Erythrogenus Brandt – (7.0±5.6)×10⁻³ (n-6).

1. Beresford, N.A., M. Balonov, K. Beaugelin-Seiller, J. Brown, D. Copplestone, J.L. Hingston, J. Horyna, A. Hosseini, B.J. Howard, S. Kamboj, T. Nedveckaite, G. Olyslaegers, T. Sazykina, J. Vives i Batlle, T.L. Yankovich and C. Yu. An international comparison of models and approaches for the estimation of the radiological exposure of non-human biota // Appl. Radiat. Isot. – 2008. – Vol. 66(11). – P. 1745–1749.

2. Panitskiy A.V., Lukashenko S.N., Kadyrova N.Zh. 137Cs and 90Sr in lizards of Semipalatinsk test site // Journal of Environmental Radioactivity. – 2017. – Vol. 166 P1. – P. 91–96.

3. Barnett C.L., Gaschak S., Beresford N.A., Howard B.J., Maksimenko A., 2009. Radionuclide activity concentrations in two species of reptiles from the Chernobyl exclusion zone // Radioprotection. – 2009. – Vol. 44, P. 537– 542. https://doi.org/10.1051/radiopro/20095099

4. National Report, 1998 Chernobyl accident: consequences and their overcoming. Edited by acad. Konoplya E. F., professor Rolevich I. V. – 2nd ed., revised and added – Minsk: Ministry of emergencies, national Academy of Sciences of Belarus, 121 pages.

5. Lukashevich V. N. Accumulation of 137Cs by background species of amphibians and reptiles of Polessky State Radiation and Ecological Reserve. Modern problems of radiobiology: Proceedings of the international scientific conference, Gomel, 14–15 Oct. 2010, – P. 73–74. In Russian.

6. Lipskaya A. I., Zheltonozhskaya M. V., Nikolaev V. I., Burdo E. O., Kulich N. V. Concentration of technogenic radionuclides in the organisms of small rodents of the Chernobyl exclusion zone in the remote post-accident period // Nuclear Physics and Energy. – 2011. – Vol. 12, No. 2. – P. 180–185. In Russian.

7. Lukashenko S.N. Research Report for 2014 of the IRSE NNC RK under the State Program “Development of Nuclear Power Production in Kazakhstan”. IRSE NNC RK, Kurchatov. –2014. – 43 pp.

8. М I 2143-91 RK “Activity of radionuclides in volumetric samples. Technique for measurement using beta-spectrometer”.

9. Wood M.D., Leah R.T., Jones S.R., Copplestone D. Radionuclide transfer to invertebrates and small mammals in a coastal sand dune ecosystem // Sci Total Environ. – 2009. – Vol. 407(13). – P. 4062–4074.

10. Wood M.D., Beresford NA, Semenov D.V, Yankovich T.L, Copplestone D. Radionuclide transfer to reptiles // Radiat. Environ. Biophys. – 2010. – Vol. 49. – P. 509– 530. https://doi.org/10.1007/s00411-010-0321-1

11. Beresford N.A., Barnett C.L., Gashchak S., Maksimenko A., Guliaichenko E., Wood M.D., Izquierdo M. Radionuclide transfer to wildlife at a “Reference site” in the Chernobyl Exclusion Zone and resultant radiation exposures // Journal of Environmental Radioactivity. – 2020. Vol. 211. P. 105661. https://doi.org/10.1016/j.jenvrad.2018.02.007

12. Kunduzbayeva A.Ye., Lukashenko S.N., Kabdyrakova A.M., Larionova N.V., Magasheva R.Yu., Bakirova G.A. Speciation of 137Cs, 90Sr, 241Am, and 239+240Pu artificial radionuclides in soils at the Semipalatinsk Test Site // J. Environ. Radioact. – 2022. – Vol. 249. – 9 p. https://doi.org/10.1016/j.jenvrad.2022.106867