Dissolution kinetics of particles of irradiated Chernobyl nuclear fuel: influence of pH and oxidation state on the release of radionuclides in the contaminated soil of Chernobyl

Kashparov, V.; Protsak, Valentyn; Ahamdach, Noureddine; Stammose, D.; Pérès, J.-M.; Yoschenko, Vasyl; Zvarich, S.I.

doi:10.1016/s0022-3115(00)00010-6

Cited by 37 publications

(30 citation statements)

References 10 publications

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“…level of matrix oxidation, as well as medium acidity. The phenomenon was confirmed by model experiments on kinetics of the Chernobyl irradiated nuclear fuel particles dissolution in solutions with pH 3-9 study [7]. The lowest rate of FP dissolution was observed i n a neutral medium.…”

Section: Kinetics Of the Fuel Particles Dissolution In Soils In Natursupporting

confidence: 56%

“…Their dispersal composition is well described by lognormal law of distribution [4] and corresponds to the dispersal composition of radioactive fall-outs [6]. Parameters of distribution for FP dispersal composition were obtained [4,7]. Median radius of particles doesn't depend on annealing temperature and decreases with annealing duration reaching the nuclear fuel grain (crystallite) size (3 ^m).…”

Section: Physico-chemical Properties Of the Fuel Particles And Mechanmentioning

confidence: 99%

“…Hence, the fuel particles (separate grains, crystallites of uranium oxide) with median diameter of about 6 ^m and thenaggregates can be divided into 2 groups [7]:…”

Section: Kinetics Of the Fuel Particles Dissolution In Soils In Naturmentioning

confidence: 99%

“…Parameters of the fuel particles dissolution depending on their genesis and medium acidity were obtained as a result of fulfilled works [6][7][8]. Period of FP half-dissolution varies from 14 to 1 year with soil acidity increase (pHj^o from 7 till 4).…”

Section: Kinetics Of the Fuel Particles Dissolution In Soils In Naturmentioning

confidence: 99%

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Assessment of the radiological situation resulted by the accidental release of fuel particles

Kashparov¹

2002

Radioprotection

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Section: Kinetics Of the Fuel Particles Dissolution In Soils In Natursupporting

confidence: 56%

Section: Physico-chemical Properties Of the Fuel Particles And Mechanmentioning

confidence: 99%

“…Hence, the fuel particles (separate grains, crystallites of uranium oxide) with median diameter of about 6 ^m and thenaggregates can be divided into 2 groups [7]:…”

Section: Kinetics Of the Fuel Particles Dissolution In Soils In Naturmentioning

confidence: 99%

Section: Kinetics Of the Fuel Particles Dissolution In Soils In Naturmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of the radiological situation resulted by the accidental release of fuel particles

Kashparov¹

2002

Radioprotection

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“…It has been established that the rate of de struction of *'hot" particles is defined by physico-chemical properties of the particles and natural condi tions, where these particles happened to be, as well. The more is the acidity of the soil media and the more is the share of organic components in the soil, the more intensive processes of destruction of "hot" particles are observed [3,5].…”

mentioning

confidence: 99%

Plutonium and americium behaviour in soil-vegetation cover of natural and semi-natural ecosystems

2002

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Abstract. The results of investigations of transuranic elements { H,,M0Pu and 24 'Am) behaviour in the soil-vegetation cover of natural and semi-natural ecosystems in the regions of Belarus contaminated as a result of Chernobyl acci dent have been summarised. The parameters of plutonium and americium vertical migration have been estimated for typical soil varieties; the radionuclides accumulation coefficients have been defined for dominating species of meadow and forest vegetation. The dynamics of change in physico-chemical state of plutonium and americium (the share and geochemical stability of "hot" particles, the ratio between fixed and mobile forms) has been analysed in various types of soils in the post-chernobyl period. It was established that the content of exchangeable 239 -240 Pu and MI Am does not exceed 12.5%, the largest part of radionuclides is in fixed form in composition of soil humus and organo-mineral components. The linear rate of vertical migration of plutonium and americium in soils is 0.14-1.25 cm/year. Simultaneous interaction of different agrochemical parameters and natural conditions masks the influence of individual soil properties on migration rate, but the correlation with humidity has been reviled. The ac cumulation coefficients of americium in the system "soil-plant" are 1.2-4 times higher that those for plutonium. The method of reduction in the bioavailability of transuranic elements has also been proposed.

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Sources and Types of Uncertainties Associated with Radioactive Particles

Oughton¹,

Salbu²

2009

Radioactive Particles in the Environment

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Abstract:The environmental release of radionuclides associated with hot particles is more frequent than commonly recognised, and should also be expected in future nuclear events. Hence the presence of radioactive particles can be expected to influence the environmental impact and risk assessments associated with contaminated areas. This paper addresses the different types of uncertainty arising from hot particles. The first part considers the different categories and dimensions of uncertainty, and the second part illustrates the way that hot particles can impact on the source term, transfer, and biological effects of radionuclides. While it is certainly not the case that increased knowledge will always result in reduced uncertainty (for example the presence of hot particles can lead to greater variability in parameters), it should be clear that assessments will benefit greatly from a better understanding of the way hot particles can impact on the behaviour of radionuclides in the environment.

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Dissolution kinetics of particles of irradiated Chernobyl nuclear fuel: influence of pH and oxidation state on the release of radionuclides in the contaminated soil of Chernobyl

Cited by 37 publications

References 10 publications

Assessment of the radiological situation resulted by the accidental release of fuel particles

Assessment of the radiological situation resulted by the accidental release of fuel particles

Plutonium and americium behaviour in soil-vegetation cover of natural and semi-natural ecosystems

Sources and Types of Uncertainties Associated with Radioactive Particles

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