Biomedical subjects

S V Fesenko

Publications and source records attributed to S V Fesenko.

42 records · Page 3Linked to original sources

PubMedDate not supplied

[The quantitative parameters of the vertical migration of radionuclides in the soils in different types of meadows].

The two-component convective-diffusional model was used for determination of vertical migration parameters of 90Sr [correction of 90Cs] and 137Cs in meadow ecosystems and dependence from meadow type and soil properties was shown. The migration coefficients decrease in the order: peat land, lowland meadows, flood-plain meadows, dry meadows. The ecological half-life in the root zone ranges from 55 to 143 y for dry meadows and from 15 to 21 y for peat lands. Analogous parameters for 90Sr was 30-96 and 13-18 y, respectively. Since 1987 to 1994 the ecological half-life of 137Cs increased by a factor of 1.7-6.0.

Cesium Radioisotopes↗

PubMedDate not supplied

[An estimation of the half-life periods of 137Cs content in the root-inhabited soil layer of meadow ecosystems].

A model of vertical migration of 137Cs was developed with taking into account the sorption of this radionuclide by soil. The parameters of the model and prediction of vertical distribution of radionuclides in soils are estimated for a wide range of meadows and soils, typical of various regions of Russia contaminated after the accident at the Chernobyl NPP. Ecological half-lives of the 137Cs content in the root-containing zone of soil were calculated. It was shown that a contribution of self-purification of soils into an overall decrease in the 137Cs content in the root-containing zone (0-10 cm) varies from 2.2% for sandy loam soils (dry meadows) to 99% for peaty soils (peat-bog meadows).

Cesium Radioisotopes↗

PubMedDate not supplied

[Dynamics of decrease of the transfer coefficient of Cs-137 to agricultural plants after the Chernobyl AES accident].

Data on the dynamics of the decrease of 137Cs transfer factors to agricultural plants after the accident at the ChNPP are presented. The ecological half-life periods of decrease in transfer factors in the first period after the accident (1987-1989) have been shown to vary between 1.2 and 2.9 years. Subsequently the decrease slowed down and in 1990-1994 the half-life periods amounted to 4-11 years depending on plant species peculiarities and soil properties.

Cesium Radioisotopes↗

PubMedDate not supplied

[An analysis of the factors determining the efficacy of protective measures in agriculture in radioactive contamination].

Based on different criterion analysis of factors, which govern the effectiveness of agricultural countermeasures in various periods after radionuclide fallout is given. Soil properties, special features of agricultural production and time elapsed after the fallout are shown to play a decisive role in assessing efficiency of countermeasures in agriculture. General tendencies, which reflect the influence of these factors are studied, their significance is evaluated.

Agriculture↗

PubMedDate not supplied

[An evaluation of the efficacy of protective measures in the late period after the accident at the Chernobyl Atomic Electric Power Station].

Results from a comparative analysis of the efficiency of countermeasures in agriculture in a long term after the ChNPP accident are presented. Based on criteria such as reduction factor for 137Cs transfer to plants, averted dose and cost of 1 manSv relative ratings of countermeasures are given. Using one of the farms, located in the contaminated area as an example radiological justification of the optimal systems of countermeasures application is provided.

Agriculture↗

PubMedDate not supplied

[Analysis of the strategy for the use of protective measures in agriculture after the accident at the Chernobyl power plant].

Justification of the methodological approach to evaluating effectiveness of the countermeasure strategies in agricultural production on contaminated territories is provided. The results from a comparative analysis of strategies for protective measures in agriculture after the Chernobyl NPP accident are presented. The time between radioactive fallout and application of countermeasures is shown to be one of the main factors responsible for effectiveness of countermeasures applied.

Agriculture↗