scholarly journals Radioecological monitoring in the vicinity of Rostov NPP. The analysis of results of long-term investigations

2019 ◽  
Vol 12 (2(св)) ◽  
pp. 54-65 ◽  
Author(s):  
A. V. Panov ◽  
N. N. Isamov ◽  
V. K. Kuznetsov
Keyword(s):  
Specific Activity ◽  
Natural Radionuclides ◽  
Average Concentration ◽  
Agricultural Products ◽  
Vegetable Crops ◽  
Average Content ◽  
Transfer Factors ◽  
Artificial Radionuclides ◽  
Environmental Objects ◽  
Radioecological Monitoring

The purpose of this work was to assess the influence of the Rostov NPP (consisting of 4 units with VVER1000 reactors) on the radioecological situation in the region of the station location within 18 years from the start of the first power reactor. Based on the results of observations at the radioecological monitoring network established in 2001, which included seven control sites and five control points, the content of natural and artificial radionuclides in environmental objects, agricultural products and foodstuffs was analyzed. It was shown that over the entire period under consideration, the average content of 90Sr in the soils of agroecosystems of the 15-km zone of influence of the Rostov NPP varied within 1.7-7.4 Bq/kg, and 137Cs – 7.5-14.9 Bq/kg. It was not detected any trends to increase in the concentrations of artificial radionuclides in the soil throughout the considered territory. The variation range of the average content of natural radionuclides in soils was 561-634 Bq/kg for 40K, 23.4-27.5 Bq/kg for 226Ra and 32.7-35.9 Bq/kg for 232Th. The average concentration of 90Sr in the grain was in the range of 0.1-0.68 Bq/kg, and 137Cs – 0.23-0.54 Bq/kg. Even the maximum specific activity values of artificial radionuclides in food grain were below the SanPiN standards 55 times for 90Sr and 65 times for 137Cs. The maximum levels of 137Cs in vegetables and potatoes and vine crops were 80 times lower than the SanPiN standards. The maximum levels of specific activity of 90Sr in milk were more than 400 times lower than the SanPiN standard (25 Bq/kg), and for 137Cs (standard 100 Bq/kg) this difference was 600 times. Vegetable crops were characterized by minimal transfer factors (TFs) of radionuclides. TFs of 90Sr in vegetables, depending on the product type, was in the range of 0.04-0.17, and for 137Cs it was in the range of 0.008-0.2 (Bq/kg)/(kBq/m2 ). Maximum TFs of radionuclides were noted in grasses. TF of 90Sr in natural and perennial grass was 0.75-2.2, and for 137Cs it was 0.28-0.86 (Bq/kg)/(kBq/m2 ). The differences in transition factors between vegetables and grass reached 50 times, and on average, they were 10-20 times. It was noted that all types of crops accumulated 90Sr on average 2-5 times more in comparison to 137Cs ac cumulation. It was shown that the content of artificial radionuclides in the water of the Tsymlyansk reservoir is 163 and 183 times lower than the permissible level for 90Sr and 137Cs, respectively. The analysis of 18-year results of observations of the radioecological situation in the vicinity of the Rostov NPP allows to conclude that the operation of this NPP in normal mode and the commissioning of new power-generating units did not lead to a recorded increase in the content of artificial radionuclides in agricultural products, foodstuffs and environmental objects.

scholarly journals The analysis of radioecological monitoring results in the vicinity of the Kursk Nuclear Power Plant

2020 ◽  
Vol 13 (2) ◽  
pp. 19-30 ◽  
Author(s):  
V. K. Kuznetsov ◽  
A. V. Panov ◽  
N. I. Sanzharova ◽  
N. N. Isamov ◽  
N. V. Andreeva ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Specific Activity ◽  
Natural Radionuclides ◽  
Agricultural Products ◽  
Artificial Radionuclides ◽  
Radioecological Monitoring ◽  
The Impact ◽  
Maximum Content

The research presents the data of long-term observations of the impact of the Kursk Nuclear Power Plant operation on the radioecological situation in the region of its location. The dynamics of the content of natural and artificial radionuclides in the components of agricultural ecosystems was studied due to the data based on the information from the radioecological monitoring network developed in 2003. Samples of soils, agricultural products and animal feeds were taken at 11 control sites located on arable lands and grasslands in the vicinity of the Kursk Nuclear Power Plant, and, in settlements, locally produced food was sampled. It was shown that for the period of studies of 2003-2019, the average specific activity of 90Sr in the soils of agroecosystems of the 10 km influence zone of the Kursk Nuclear Power Plant varied within 2.7-4.3 Bq/kg, and specific activity of 137Cs was 14.6-40.8 Bq/kg. At the same time, there were found no trends of increase in the content of artificial radionuclides in soil over time and at different distances from the NPP, and the increased specific activity of 137Cs in soil compared to the global background is explained by the Chernobyl fallout. The variability of the average content of natural radionuclides in the soil for 40K was 481-625 Bq/kg, 226Ra – 20.6-29.5 Bq/ kg, 232Th – 28.2-39.2 Bq/kg, which corresponded to all-Russian data. The average specific activity of 90Sr in grain was 0.24-0.43 Bq/kg, and 137Cs – 0.19-0.37 Bq/kg. Even the maximum levels of artificial radionuclides in grain were 44 times for 90Sr and 85 times for 137Cs lower than the current SanPiN standards. The highest specific activity values of 137Cs and 90Sr in potatoes, vegetables, and gourds were 160 times lower than the SanPiN standards. It was noted that the maximum content of 90Sr in milk was more than 540 times lower than the SanPin standard, and for 137Cs this difference was 330 times. The maximum content of 137Cs in beef turned out to be over 850 times lower than the SanPiN standard for this radionuclide. About 70 Bq/a of 90Sr and 200 Bq/a of 137Cs enter the population diet with locally produced food, which is almost 400 times for 137Cs and 200 times for 90Sr lower than the annual limit. Milk (46%), meat (31%), potatoes and vegetables (14%) make the main contribution to the formation of the internal dose from agricultural products containing 137Cs, and contribution to dose from 90Sr is made by milk (14%) and crop products (potatoes, vegetables, bread) – up to 78%. In general, we concluded that over the past 17 years, the operation of the Kursk Nuclear Power Plant did not lead to a deterioration of the radioecological situation in the region of its location, because during the survey period there was no significant increase in the content of artificial radionuclides in agricultural products, foods and environmental components.

Assessment of the Environmental Hazard and Possibility of Processing of Refinement Tailings of Loparite Ores Concentration

2020 ◽  
Vol 24 (12) ◽  
pp. 46-51
Author(s):  
A.A. Goryachev ◽  
E.A. Krasavtseva ◽  
V.V. Lashchuk ◽  
P.V. Ikkonen ◽  
A.A. Smirnov ◽  
...  
Keyword(s):  
Toxic Effect ◽  
Specific Activity ◽  
Higher Plants ◽  
Natural Radionuclides ◽  
Water Extract ◽  
Material Composition ◽  
Distilled Water ◽  
Average Content ◽  
Waste Storage ◽  
Ore Dressing

Geotechnical properties and material composition of loparite ore dressing tailings have been investigated. It was established that already at the stage of waste storage, heterogeneity of the material composition and contents of valuable components is formed. The average content of loparite and eudialyte in the refinement tailings is 1.1 and 0.5%, respectively. The effective specific activity of natural radionuclides 226Ra, 232Th and 40K and investigated samples is in range values 646±21 – 1300±24 Bk/kg. When leaching samples of tailings in distilled water, the concentration of fluorineions in the water extract significantly exceeds the MPC of water bodies for fishery and household purposes. By phytotesting it was found that water extracts of tailings and its dilution – enrichment do not have a significant toxic effect on the growths of higher plants.

scholarly journals Determination of Activity Concentrations and Soil to Cassava Transfer Factors of Natural Radionuclides in Ikot Ekpene Local Government Area, Akwa Ibom State, Nigeria

2021 ◽  
pp. 28-35
Author(s):  
Ime Essien ◽  
Akaninyene Akankpo ◽  
Alice Nyong ◽  
Etido Inyang
Keyword(s):  
Local Government ◽  
Specific Activity ◽  
Natural Radionuclides ◽  
Local Government Area ◽  
Ingestion Dose ◽  
Transfer Factors ◽  
Activity Concentrations ◽  
Radiological Health ◽  
Determination Of Activity

Natural radioactivity exists in primordial formations such as rocks, soils, water and air where long lived radionuclides such as , ,  and their affiliates are found. This work was done to determine the specific activity of radionuclides, soil to cassava transfer factor and the effective dose due to consumption of radionuclide in cassava products in Ikot Ekpene Local Government Area, Akwa Ibom State. The specific activity of 40K, 238U and 232Th in soils and cassava in   the study area was measured using gamma spectrometry. Mean specific activity in soils ranged from BDL to 153.46 ± 10. 99 Bq/Kg for 40K; BDL to 31. 22 ± 7.49 Bq/Kg for 238U and 1.03 ± 0.10 to 12.71 ± 1.24 Bq/Kg for 232Th. Mean specific activity of the radionuclides in cassava in all  locations ranged from 119.86 ± 8.61 to 601.28 ± 43.23 Bq//Kg for 40K; below detectable limit (BDL) to 15. 89 ± 1.55 Bg/Kg for 238U and BDL to 15. 89 ± 1.55 Bq/kg for 232Th. Transfer factors ranged between 3.64 to 4.18 for 40K; 1.30 to 1.82 for 238U and 0.51 to 0.72 for 232Th.  Effective ingestion dose due to the consumption of cassava from the area ranged between 0.99 mSv/yr to 1.08 mSv/yr and 2.68 mSv/yr to 29.16 mSv/yr for children and adult respectively. Most of the TF and effective ingestion dose results for this study were above the recommended value of unity which suggests that consumption of cassava from the studied area may pose radiological health.

Method of Non-Destructive Measurement of Natural Radionuclides Concentration in Building Materials

ANRI ◽  
2021 ◽  
Vol 0 (1) ◽  
pp. 31-44
Author(s):  
Aleksey Vasil'ev ◽  
Aleksey Ekidin ◽  
Mariya Pyshkina ◽  
Georgiy Malinovskiy ◽  
Aleksandra Onischenko ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Flux Density ◽  
Building Materials ◽  
Specific Activity ◽  
Natural Radionuclides ◽  
Gamma Spectrometer ◽  
Average Activity ◽  
Destructive Measurement ◽  
Non Destructive ◽  
Calculated Flux

A method for non-destructive monitoring of the content of natural radionuclides in building materials has been developed. Spectrum measurements of gamma radiation are carried out with a pre-calibrated field gamma spectrometer. The calculation of the average specific activity of natural radionuclides in building materials is carried out by comparing the calculated flux density of unscattered gamma quanta normalized to the specific activity, and the experimentally measured count rates in the photopeak. calculated for the geometry of the room under study and the location of the detector. Application of the developed method makes it possible to estimate the average activity of natural radionuclides in building materials without destruction.

scholarly journals Radioecological Monitoring of Adjacent Territories to the Former Semipalatinsk Nuclear Test Site, East Kazakhstan

2018 ◽  
Vol 7 (4.36) ◽  
pp. 323
Author(s):  
Sergazy Duyssembaev ◽  
Ainur Serikova ◽  
Shyngys Suleimenov ◽  
Nurgul Ikimbayeva ◽  
Assel Zhexenayeva ◽  
...  
Keyword(s):  
Specific Activity ◽  
Test Site ◽  
Nuclear Test ◽  
Plant Water ◽  
Beta Particles ◽  
Radiometric Measurements ◽  
Semipalatinsk Nuclear Test Site ◽  
Radioecological Monitoring ◽  
East Kazakhstan ◽  
Permissible Levels

This paper presents the results of complex radioecological monitoring of the territories, which are situated near the Semipalatinsk Nuclear Test Site, East Kazakhstan region.  The radiometric measurements showed that the concentration of radon and beta particles are below the permissible levels. EROA values of a radon in rooms fluctuates from 44 Bq/m3 to 195 Bq/ m3. The measured values of fluency of betta-particles in all the studied points are less than 10 freq/ min*cm2. A specific activity of radionuclides, such as Am-241, Cs-137 and  Pu – 239/240  in soils, plant, water, meat and milk were evaluated.   

scholarly journals Features of accumulation of the technogenic radionuclides in meat of some hunting animals in the Trans-Urals

2019 ◽  
pp. 47-52
Author(s):  
Alexander Mikhailovich Okunev
Keyword(s):  
Specific Activity ◽  
Natural Radionuclides ◽  
Farm Animals ◽  
Beta Activity ◽  
Radioactive Cesium ◽  
Anthropogenic Pressure ◽  
Wild Animals ◽  
Strontium 90 ◽  
Cesium 137 ◽  
Lead 210

The degree of contamination of the organism of wild animals with radionuclides is of particular importance in the framework of environmental monitoring and assessment of its safety, both for humans and for animals. However, the majority of domestic scientific works on this subject concerns farm animals, and the information relating to hunting animals is much less. This fact determined the relevance of our work, the purpose of which was to study the features of the accumulation of global technogenic and natural radionuclides in the meat of some wild animals in the TRANS-Urals. Experimental data on the content of technogenic radionuclides in the meat of hunting animals were obtained in the autumn-winter periods of 2014 – 2018. Analysis of the average data showed, that the content in the meat of wild animals cesium-137, depending on the animal species, ranged from 4.1 to 49.2; lead-210 – 0,7 – 4,3; and strontium-90 – 0,1 – 1,7 Bq/kg. The total beta- activity of radionuclides in the meat of wild animals varied, depending on the species, from 71.2 to 104.3 Bq/kg. At the same time, all the studied samples of meat corresponded to the norms established by SanPiN-2010 for this type of food product. Some increased accumulation of radioactive cesium (49.2 Bq/kg) and other anthropogenic radionuclides was observed in wild reindeer meat, and in the southern regions of the TRANS-Urals – in bear and wild boar meat (21.1 and 17.4 Bq/kg, respectively). In the muscle tissue of the roe deer the content of this radionuclide was slightly higher than that of the elk (14.7 and 12.2 Bq/kg, respectively). The lowest concentration of cesium-137 (4.1 Bq/kg) and other nuclides was found in beaver meat. The content of strontium-90 in the meat of all tested animals was at a minimum level, and the specific activity of lead-210 was higher than strontium-90 by 2 - 10 times, depending on the species, which indicates the accumulation of this radionuclide in forest ecosystems due to anthropogenic pressure and expansion of the technogenic zone of cities.  The results of studies have shown that differences in the accumulation of technogenic radionuclides in the meat of the hunting animals are largely related to the nature of feeding and composition of the diet of wild species, and are subject to significant fluctuations in accordance with the change in the volume and qualities of food resources in forest biotopes over the year.      

scholarly journals Isolation and Identification of Tomato Wilt Pathogen Under Green House Conditions in Tripoli Area

2019 ◽  
pp. 327-337
Author(s):  
Khayriyah Misbah Dayab ◽  
Najat Khalifa ElGariani
Keyword(s):  
Wilt Disease ◽  
Agricultural Products ◽  
Vegetable Crops ◽  
Surrounding Area ◽  
Isolation And Identification ◽  
Tomato Crop ◽  
The Third ◽  
Tomato Roots ◽  
Solanaceae Family ◽  
Tomato Wilt

The tomato crop is Lycopersico esculentum L. of the Solanaceae family. The considered world's first among the vegetable crops in terms of cultivated area annually. It is the third most important agricultural products after wheat and barley and the second most important vegetable crops after potatoes in Libya. The study aimed to isolate and identify the cause of tomato wilt disease its under greenhouse conditions. Four Fusarium oxysporum isolates were obtained from tomato roots and surrounding area growing under protected agricultural conditions at Janzour and Ein Zara in Tripoli- libay. The fungus were more frequent at Ein Zara area (37%), compared with Janzour (22%).

scholarly journals Using Gamma Spectroscopy to Calculate Radioactive Contaminants in Foreign and Local Tobacco Samples

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Ahmed F. Mkhaiber ◽  
Auday T. Al-Bayati ◽  
Enas A. Jawad ◽  
Khalid H. Mahdi
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Gamma Spectroscopy ◽  
Natural Radionuclide ◽  
Germanium Detector ◽  
Average Concentration ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Potassium 40 ◽  
Thorium 232

The normal radioactivity levels of Uranium-238, Thorium-232, and Potassium-40 were calculated for ten types of foreign and local cigarettes available on the Iraqi market using a gamma-ray spectroscopy technique employing the germanium detector system. The results of this study showed that the average specific activity for each of Uranium-238, Thorium-232 and Potassium-40 were 21.689± 4.596, 18.906 ± 4.148, and 430.094 ± 19.449 (Bq/Kg) respectively. The annual effective dose, radium equivalent activity and excess lifetime cancer risk for the studied samples were also calculated, and their rates were 11.582 μsv/y, 81.841 Bq/Kg, and 40.538 people per million per year respectively. The outcomes indicate that the rate of concentration of uranium and thorium is lower than the permissible values, whereas the average concentration of potassium was slightly higher than the permissible values. This research is important because it warns against several types of cigarettes that contain high concentrations of radionuclides, which can lead to infection cancer and then lead to the death of the person who has used it profusely. Therefore, the aim of the current research is to evaluate the radiological risks of radionuclides in tobacco cigarette smoke by evaluating their natural radionuclide concentrations.

scholarly journals Specific Activities of Natural Radionuclides and Annual Effective Dose Due to the Intake of Some Types of Children Powdered Milk Available in Baghdad Markets

2017 ◽  
Vol 14 (3) ◽  
pp. 619-624
Author(s):  
Baghdad Science Journal
Keyword(s):  
Effective Dose ◽  
Sodium Iodide ◽  
Specific Activity ◽  
Annual Effective Dose ◽  
Natural Radionuclides ◽  
Mean Value ◽  
Powdered Milk ◽  
Effective Doses ◽  
The Mean ◽  
Specific Activities

In this research the specific activity of natural radionuclides 226Ra, 232Th and 40K were determined by sodium iodide enhanced by thallium NaI(TI) detector and assessed the annual effective dose in Dielac 1 and 2 and Nactalia 1 and 2 for children of less than 1 year which are available in Baghdad markets. The specific activity of 40K has the greater value in all the types which is in the range of allowed levels globally that suggested by UNSCEAR. The mean value of annual effective doses were 2.92, 4.005 and 1.6325 mSv/y for 226Ra, 232Th and 40K respectively.

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