Some Aspects of Radioecological Monitoring of High Aquatic Plants From Water-Bodies Within the Chernobyl Accident Exclusion Zone

2009 ◽  
Author(s):  
Natalie L. Shevtsova ◽  
Dmitriy I. Gudkov ◽  
Andrian A. Yavnyuk
Keyword(s):  
Chernobyl Accident ◽  
Natural Populations ◽  
Absorbed Dose ◽  
Common Reed ◽  
Water Bodies ◽  
Low Doses ◽  
Exclusion Zone ◽  
Absorbed Dose Rate ◽  
The Common ◽  
High Level

The impact analysis of low doses of ionizing radiation on the breathers in natural populations is an important part of radiobiological studies of non-human biota. The main aim of our studies was to investigate some cytogenetic, morphological and reproductive rates of the common reed (Phragmites australis (Cav.) Trin. ex. Steud.) from different water bodies within the Chernobyl accident exclusion zone. The absorbed dose rate for littoral emergent plants in sampling water bodies was varied from 1.3E−02 to 1.6E−01 Gy/h. The rate and main types of chromosome aberrations in roots meristems, morphological damages in seed germs, as well as rates of germinating ability and power were analyzed. There were registered rather low rate of germinating ability (14–48%) and germinating power (<1) of seeds from all sampling water bodies with high levels of radioactive contamination in comparison to control ones. Against the general suppressed background the effect of relative stimulation of more affected seeds was observed. With increase of absorbed dose in range of 1.3E−02–1.6E−01 Gy/h the number of germinated seeds was increased. At the same time the number of morphological damages of seeds was increased as well. There was determined the positive correlation between absorbed dose rate and chromosome aberration rate in roots of the common reed from sampling water bodies. The highest rate of chromosome aberrations (up to 17%) were registered in plants with high level of morphological deviations in seeds germs. The data obtained from the complex analysis of natural populations of the common reed from the radioactive contaminated water bodies testify about rather high level of genetic efficiency of low doses of long-term exposure.

scholarly journals Comparison of the Responses of New Reduced-Size Calorimetric Cells Made of Different Structure Materials for High Energy Deposition

2020 ◽  
Vol 225 ◽  
pp. 04008
Author(s):  
A. Volte ◽  
C. Reynard-Carette ◽  
A. Lyoussi ◽  
J. Brun ◽  
M. Carette
Keyword(s):  
Energy Deposition ◽  
Electrical Power ◽  
Analytical Calculation ◽  
Absorbed Dose ◽  
High Energy ◽  
Absorbed Dose Rate ◽  
Wide Range ◽  
Differential Calorimeter ◽  
High Level ◽  
Thermal Simulations

This paper concerns experimental and numerical works on a new differential calorimeter called CALORRE and validated recently under irradiation conditions in MARIA reactor at low nuclear absorbed dose rate level. Works focus on a specific configuration of CALORRE which was designed especially for the measurement of high nuclear energy deposition rates inside Material Testing Reactors. Due to the high level, a new calibration system was fabricated in order to determine the response of the new configuration under laboratory conditions for a very wide range of electrical power never applied in the literature. The response of the new configuration can be considered linear for this very wide range of electrical power. An analytical calculation shows the contribution of each heat transfer in specific zones. 3D thermal simulations performed by means of COMSOL Multiphysics under irradiation conditions give the predictions of the calorimeter behavior under real conditions (up to 20W.g−1).

Lesion in Common Reed by Gall-Producing Arthropods in Water Bodies of the Chernobyl NPP Exclusion Zone

2006 ◽  
Vol 42 (1) ◽  
pp. 82-88 ◽  
Author(s):  
D. I. Gudkov ◽  
S. F. Uzhevskaya ◽  
A. B. Nazarov ◽  
L. A. Kolodochka ◽  
T. N. Dyachenko ◽  
...  
Keyword(s):  
Common Reed ◽  
Water Bodies ◽  
Exclusion Zone ◽  
Chernobyl Npp

scholarly journals Impacts of radiation on the bacterial and fungal microbiome of small mammals in the Chernobyl Exclusion Zone

2020 ◽  
Author(s):  
Rachael E. Antwis ◽  
Nicholas A. Beresford ◽  
Joseph A. Jackson ◽  
Ross Fawkes ◽  
Catherine L. Barnett ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Bacterial Community Composition ◽  
Absorbed Dose ◽  
Exclusion Zone ◽  
Absorbed Dose Rate ◽  
Dose Rates ◽  
Bank Voles ◽  
Habitat Variation ◽  
Fungal Microbiome ◽  
Effects Of Radiation

ABSTRACTEnvironmental impacts of the 1986 Chernobyl Nuclear Power Plant accident are much debated, but the effects of radiation on host microbiomes has received little attention to date. We present the first analysis of small mammal gut microbiome from the Chernobyl Exclusion Zone in relation to total absorbed dose rate and including caecum as well as faeces sample. The associations between microbiome communities and radiation exposure varied between host species. Associations between microbiome and radiation was different for analyses based on ambient versus total weighted absorbed dose rates. We found considerable variation between patterns for faecal and gut samples of bank voles, suggesting faecal samples are not an accurate indicator of gut composition. For bank vole guts, associations between radiation and bacterial community composition were robust against geographical and habitat variation. We found limited associations between radiation and fungal communities. Host physiological mechanisms or environmental factors may be driving these patterns.

scholarly journals Reconstruction of the absorbed dose of ionizing radiation for helophytes in the water bodies of the near emergency zone at the Chornobyl NPP

2020 ◽  
Vol 21 (4) ◽  
pp. 338-346
Author(s):  
V.V. Belyaev ◽  
◽  
O.M. Volkova ◽  
D.I. Gudkov ◽  
S.P. Pryshlyak
Keyword(s):  
Ionizing Radiation ◽  
Dose Rate ◽  
Absorbed Dose ◽  
Growing Season ◽  
Plant Roots ◽  
Average Dose ◽  
Exclusion Zone ◽  
Absorbed Dose Rate ◽  
Radionuclide Content ◽  
Biological Dose

Based on modeling the dynamics of the Chornobyl emission radionuclide content in the components of the most polluted reservoirs of the Chornobyl Exclusion Zone, the absorbed dose for helophytes was reconstructed. During the growing season of 1986, the absorbed dose of plants of Glyboke Lake was 78 Gy, Daleke Lake 39 Gy. The absorbed dose rate of plant roots was 2.4 times higher than that of aboveground organs. According to actual data, in the period 2016 - 2019 in the Glyboke Lake average dose of external and internal plant irradiation was about 7.5 mGy/year, and in the Daleke Lake 5.6 mGy/year. On abnormally contaminated sections of the Glyboke Lake, the external dose reaches 0.5 - 1.0 Gy/year. During the period 1986 - 2020, the maximum cumulative (biological) dose of helophytes of Glyboke Lake can be 190 Gy, Daleke Lake 80 - 85 Gy.

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