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Distribution of technogenic radionuclides in alluvial sediments and among fractions of the soil in the near zone of the krasnoyarsk mining and chemical combine

“…The authors separated hot particles 0.13 0.01 mm in size, which were called second kind hot particles. The specific activity of 137 Cs in such particles is higher by an order of magnitude than that of the fractions of the same size studied in this work, while the activity of 137 Cs in soils studied by us is close to that reported in [15].…”

“…Gritchenko et al [15] reported on the distribution of technogenic radionuclides in soil samples collected from the most contaminated areas of the floodplain (Atamanovskii Isl.). The authors separated hot particles 0.13 0.01 mm in size, which were called second kind hot particles.…”

“…The mineralogical composition of the clay fractions is represented by chlorite3illite association, sometimes, with smectite inclusions. According to the published data [15], in this association, it is illite that is the primary sorbent for technogenic radionuclides. Figure 2 presents the 137 Cs distribution among size fractions.…”

“Hot” and active particles in alluvial soils and sediments of the Yenisei river: Radioisotope composition

“…The active particles or the "hot" particles of 2nd kind have been earlier revealed and described in the literature [6,7] for the contaminated soils of the Atamanovsky island (10 km from discharge, point 3 in Table 2). Besides this point we studied the active particles in several samples of other contaminated 230 RADIOPROTECTION Figure 2.…”

“…Investigations carried out within last ten years have shown, that alluvial soils and sediments of the Yenisei river situated in flood-lands of the river valley downstream the KMCPP are contaminated by "hot" and active particles of various type [4][5][6][7]. The "Hot" particles with activities in the range of n · 10 4 to n · 10 6 Bq per particle are spread rarely enough (60-70 particles per km 2 ).…”