Nuclear Physics and Atomic Energy


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, Russian
  Periodicity: 4 times per year

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Nucl. Phys. At. Energy 2017, volume 18, issue 4, pages 341-349.
Section: Radiobiology and Radioecology.
Received: 27.07.2017; Accepted: 28.12.2017; Published online: 20.02.2018.
PDF Full text (ua)
https://doi.org/10.15407/jnpae2017.04.341

Dynamics of physico-chemical forms of radionuclides in the bottom sediments of cooling pond of the ChNPP after their drying: 1. Model experiment

V. P. Protsak1,*, . . Odintsov2, Y. V. Khomutinin1, M. A. Jurba1, N. M. Prokopchuk1, V. O. Kashparov1

1 Ukrainian Institute of Agricultural Radiology, National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine
2 Institute of Safety of NPP, National Academy of Sciences of Ukraine, Kyiv, Ukraine

*Corresponding author. E-mail address: protsak2013@gmail.com

Abstract: Dynamics of the forms of radionuclides in the bottom sediments of cooling pond of the ChNPP after their drying and exposure in full-scale conditions has been estimated by the method of successive leaching. According to the results of the research the main part of the radionuclides (> 90 %) continues to be in the non-exchange state for 4 years after drying. Significant part of the radionuclides remains not recovered from the solid phase of bottom sediments of cooling pond of the ChNPP even after using "super-hard" extraction conditions. This indicates the presence of 90Sr, 238,239,240Pu, 241Am and part of 137Cs in the composition of chemically stable fuel particles. Therefore, this part of radionuclides can not be mobilized in natural conditions for dozens of years. The obtained results indicate that on the drained parts of the cooling pond bed of the ChNPP one should not expect significant increase of mobility and bioavailability of radionuclides in the next 5 - 10 years.

Keywords: sequential leaching of radionuclides, forms finding of radionuclides, radioactive contamination, bottom sediments, cooling pond of the ChNPP.

References:

1. Technical and economic reasons for the decommissioning of the cooling reservoir of the State Specialized Enterprise "Chernobyl NPP". In: Materials of technical seminar "Results of activities related with the decommissioning of the ChNPP cooling reservoir" (1 - 3 Oct. 2013, Kyiv). (Ukr)

2. D. Weiss et al. Collection and analysis of data related to the contamination of the Chernobyl cooling pond. CEC Contract No. B75350/99/62/42/MAR/C2. Final report. (GRS, 2000).

3. V.A Kashparov et al. Kinetics of fuel particle weathering and 90Sr mobility in the Chernobyl 30-km exclusion zone. Health Physics 76(3) (1999) 251. Article

4. V.A. Kashparov et al. Dissolution kinetics of particles of irradiated Chernobyl nuclear fuel: influence of pH and oxidation state on the release of radionuclides in contaminated soil of Chernobyl. Journal of Nuclear Materials 279 (2000) 225. https://doi.org/10.1016/S0022-3115(00)00010-6

5. A.P. Konoplev, A.A. Bulgakov. Transformation of 90Sr and 137Cs in soil and bottom sediments. Atomic Energy 88 (2000) 56. (Rus) https://doi.org/10.1007/BF02673321

6. A. Bulgakov et al. Fuel particles in the Chernobyl cooling pond: current state and prediction for remediation options. Journal of Environmental Radioactivity 100 (2009) 329. https://doi.org/10.1016/j.jenvrad.2008.12.012

7. V.A. Kashparov. Hot Particles at Chernobyl. Environmental Science and Pollution Research. Special issue 1 (2003) 21. Article

8. V.A. Ageev et al. Determination of the 137Cs, 90Sr, 239+240Pu and 241Am radionuclides forms in the soils of the Chernobyl NPP exclusion zone. Agroekologichnyi Zhurnal 2 (2001) 68. (Rus)

9. A.A. Odintsov, A.D. Sazhenyuk, V.A. Satsyuk. Study of the 137Cs, 90Sr, 239+240Pu, 241Am, 244Cm association with a soil-absorbing complex of soils, typical for the Chernobyl NPP near zone. Radiokhimiya 46(1) (2004) 87. (Rus)

10. V.A. Ageyev, O.O. Odintsov, A.D. Sajeniouk. Routine radiochemical method for the determination of 90Sr, 238Pu, 239+240Pu, 241Am and 244Cm in environmental samples. J. Radioanal. Nucl. Chem. 264(2) (2005) 337. https://doi.org/10.1007/s10967-005-0718-5

11. V.P. Protsak, O.O. Odintsov. Assessment of forms finding of Chernobyl radionuclides in bottom sediments of cooling pond of the ChNPP. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 15(3) (2014) 259. (Ukr) http://jnpae.kinr.kiev.ua/15.3/Articles_PDF/jnpae-2014-15-0259-Protsak.pdf

12. V.A. Kashparov et al. Kinetics of dissolution of Chernobyl fuel particles in soil in natural conditions. Journal of Environmental Radioactivity 72(3) (2004) 335. https://doi.org/10.1016/j.jenvrad.2003.08.002

13. V.O. Kashparov. Radiological significance of the fuel component of the Chernobyl radioactive fallout. In: Problemy Chornobyl's'koyi zony vidchuzhennya. Naukovo-tekhnichnyi zbirnyk. Iss. 9 (yiv: Knyga, 2009) p. 5. (Rus)