[PDF]    http://dx.doi.org/10.3952/lithjphys.461ą1

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 46, 101–108 (2006)


RADIONUCLIDES IN THE GROUND-LEVEL AIR AND DEPOSITION IN THE IGNALINA NPP REGION DURING 2002 – 2005
R. Jasiulionis, A. Rožkov, and L. Vyčinas
Institute of Physics, Savanorių 231, LT-02300 Vilnius, Lithuania
E-mail: rimjas@ktl.mii.lt, rozkov@ar.fi.lt

Received 15 December 2005

Results of permanent measurements of 7Be, 137Cs, 54Mn, and 60Co activity concentration in the ground-level air and deposition in the region of the Ignalina Nuclear Power Plant (INPP) in 2002 – 2005 are presented. The activity concentrations of 60Co in the ground-level air and deposition are analyzed and compared using a model of local transport based on semiempirical formulas and the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model of the global dispersion and deposition. Results of modelling are used for the determination of 60Co activity distribution in the air and deposition in the Ignalina NPP region. The solubility in water of the aerosol-carriers of radionuclides in the ground-level air is investigated. It is shown that modelling results may be improved using different washout rates for water-soluble and insoluble radionuclides. The backward trajectories of air masses transport calculated using a HYSPLIT model show the Chernobyl NPP accident polluted area to be an additional source of 137Cs in the INPP region.
Keywords: Ignalina Nuclear Power Plant, 7Be, 137Cs, 54Mn, 60Co, radionuclides, modelling, HYSPLIT model, ground-level air, deposition
PACS: 89.60.Fe, 92.60.Sz


RADIONUKLIDAI PAŽEMIO ORE IR IŠKRITOSE IGNALINOS AE APLINKOJE 2002 – 2005 M.
.R. Jasiulionis, A. Rožkov, L. Vyčinas
Fizikos institutas, Vilnius, Lietuva

Pateikiami 7Be, 137Cs, 54Mn ir 60Co aktyvumo koncentracijų pažemio ore nuolatinių matavimų Ignalinos AE regione 2002 – 2005 metais rezultatai. 60Co aktyvumo koncentracijos pažemio ore ir iškritose analizuotos ir palygintos naudojant lokalų pernašos ir globalų HYSPLIT modelius. Remiantis modeliavimo rezultatais, įvertintas 60Co pasiskirstymas Ignalinos AE regione. Aptariami radionuklidų aerozolinės frakcijos tirpumo vandenyje rezultatai. Galimam padidintų 137Cs aktyvumo koncentracijų ore šaltiniui nustatyti panaudotas HYSPLIT modelis oro masių pernašos į Ignalinos AE regioną trajektorijoms skaičiuoti.


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