[en] The Henry constants and Gibbs energies of dissolution of noble gases in nitrogen tetroxide have been calculated on the basis of the theory of infinitely dilute solutions. A satisfactory agreement between the calculated and experimental results has been obtained. With the increase of the gas atomic mass, enthalpy of solubility decreases monotonously, so that the process of krypton and xenon slubility in nitrogen tetroxide occurs with heat release. Xenon solubility rises with the increase of temperature. Argon solubility in the condition of operation of the loop plant condenser involves investigation of kinetic behaviour of this process

[en] Short note

[en] Results of work on creation of a observation system at migration radionuclides from points of radioactive waste storage to underground waters are given. The main characteristics of a created system including 47 hydro-geological wells in 11 points of storage are given. Results on determination of the contents of Cs-137 and Sr-90 in subsoil waters in the controlled regions received during 1993-1994 are generalized. 1 ref., 2 tabs., 2 figs

[en] In carrying out the works on elimination of the consequences of the accident at the Chernobyl NPP between 1986 and 1987, the interim storages for the products of decontamination have been arranged at the territory of the Gomel Region of the Republic of Belarus. On the basis of the State program on elimination of the consequences of the accident at the Chernobyl NPP, the works on defining more exactly the radioactive waste storage sites, their stock-taking and registration have been conducted. 69 storage sites have been investigated. Their areas, the bulk of disposal ¹³⁷CS, ⁹⁰Sr, ^239,240Pu specific activities, the level of the ground water have been determined. It has been found out, that ¹³⁷CS inventory is 1.9x10¹² Bq, ⁹⁰Sr--1.9x10¹¹ Bq, ^239,240Pu--3.4x10⁹ Bq. The majority of the storage sites are potentially dangerous for the environment owing to possible ingress of radionuclides into the surface and ground waters. The system of radiation control and supervision, including the network of 47 hydrogeological holes has been created to study the processes of migration of radionuclides from the storage sites into the ground water. During this period of time, maximum specific activities of ¹³⁷Cs and ⁹⁰Sr in the ground water have accounted for 270 Bq/m³ and 40 Bq/m³, correspondingly

[en] Sorption characteristics of a carbonate-containing mineral (tripolite) were studied on model aqueous solutions and real waste water in a wide range of pH in the presence of isotopic and nonisotopic carriers and organic impurities. Sorption of ¹³⁷Cs and ⁹⁰Sr is adequately described by a power function. Analysis of ¹³⁷Cs sorption isotherms suggests that radiocesium is adsorbed by ion-exchange mechanism, during which Cs⁺ ions from the solution exchange mainly with bivalent ions of the sorbent, whereas in ⁹⁰Sr sorption trivalent ions of the sorbent also participate in the process. Saturation capacity of tripolite with respect to cesium and strontium was evaluated to be 0.3 and 1.0 mg-equiv./g respectively

[en] It is discussed the issue of radioactive contamination of Japanese soils which is the result of nuclear accident at the ''Fukushima-1'' and possible methods of their rehabilitation. (authors)

[en] The results of field trials Polygonum sachalinense F. Schmilt for phytorehmediation of bedrock are given. Is obtained, that average for two years the transfer coefficient Sr-90 from bedrock in a plant has made 12,7±4,5. (authors)

[en] A model of "9"0Sr transfer from soil to a plant, and an expression for the assessment of this transfer were received. The model has shown that the decrease of "9"0Sr transfer in the soil - plant system by liming of acid soils has a limit which limited by the CEC of the soil. The model has been tested using a set of experimental data obtained in the laboratory experiments. The evaluation of the influence of liming on the "9"0Sr transfer from soil to plant, and a comparison with the theoretical results were carried out. (authors)

No abstract available

[en] For solving technological tasks at NPP focused on the clearing of liquid radioactive waste, their immobilization and safe disposal it is proposed to use powder and granular sorbents of radionuclide on the basis of clay-salt slimes. (authors)