Volume 37, Numéro C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-1061 - C1-1066|
|Publié en ligne||25 mars 2010|
Assessment of the radiological situation resulted by the accidental release of fuel particles
Ukrainian Institute of Agricultural Radiology, Mashinostroiteley Str. 7, Kiev Region, 018162 Chabany, Ukraine
Physical-and-chemical properties of Chernobyl hot particles (radionuclide and dispersal composition, nuclear fuel burn-up and radionuclides fractionation, composition of particle matrix etc.) including the fuel particles as specific form of Chernobyl radioactive fall-out were studied . Attempt to reconstruct the conditions of the fuel particles (FP) formation during the accident was done [2,3]. Oxidisation of nuclear fuel was shown to be one of the main mechanisms of FP formation during the ChNPP accident . Maps of the near zone of Chernobyl accident contamination with radionuclides contained in deposited fuel particles were built . It was shown that previous assessments of 90Sr and transuranic elements contents in soils of the 30-km zone has been 3-4-times overestimated. Dependencies of the fuel particles dissolution rate on level of FP matrix oxidation and acidity of a medium both for natural conditions, and model media were obtained [6,7]. Prognosis of the plants contamination dynamics along the fuel traces of radioactive fall-outs was done [6,8]. Problems of the secondary radionuclides transfer in natural conditions, due to technogenic action to soil  and forest fires , as well as a significance of the FP inhalation intake into human body [11,12] are considered. Parameters of metabolism of FP-associated radionuclides in agricultural animals organism were obtained .
© EDP Sciences, 2002
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