Cesium Contamination Research Articles

EFFECT OF 137CS ON FATTY ACID COMPOSITION IN COW`S MILK

Lipid composition of raw milk is a key factor determining the nutritional value and technological suitability of the milk. Monitoring the level of contamination of cow’s milk is often not available for farmers, living in the zone of radioactive contamination. 137Cs activity concentration was higher than permissible level of 100 Bq/kg in all the studied milk samples from all the experimental groups of animals from the studied settlements. The highest value of the 137Cs activity concentration of 600 Bk/kg in cow’s milk was found in Stare Selo village of Rokytne district. According to our study, local animals have partially adapted to the seasonal increase in background radiation, and the milk of these cows, in accordance with existing quality standards, is conditionally suitable for consumption. The only factor prohibiting the consumption of this milk is the level of cesium-137 contamination. An increase in the 137Cs activity concentration of more than 100 Bq/kg in cow’s milk causes a sharp decrease in the relative content of polyunsaturated fatty acids (mostly of omega-6 fatty acids) and changes in the omega-3/omega-6 ratio downward omega-3 relative content. Relative adaptation of the lactating cows to the contamination was revealed; however, metabolism of lipids in the mammary gland and the level of lipids secretion are found to be sensitive to the level of 137Cs contamination of milk. Thus, a violation of the secretory function of the mammary gland was revealed, in particular, metabolism of lipids with 18 carbon atoms in the chain. Relative content of linoleic acid immediately decreases by several times with the increasing the contamination level. Concentration of the stearic acid immediately exceeds the physiological limits at the value of 137Cs activity concentration in milk about 110–130 Bq/kg. It gradually increases with the increasing the 137Cs activity concentration up to 270–330 Bq/kg. And then it is being plateaued with the increasing the 137Cs activity concentration up to 600 Bq/kg. On the base of the study of effect of 137Cs on fatty acid ratio in cow’s milk, the C18-coefficient is being proposed to be used as the parameter of damage to the mammary gland of cows in response to a high level of 137Cs contamination, which is calculated as follows: C18c = (C18:0–C18:2)/100). Determination of the C18-coefficient indicates the dose-dependent effect of the 137Cs contamination on lipid metabolism in the mammary gland and catabolism of polyunsaturated fatty acids, particularly linoleic acid. Duration of the affecting contamination is obviously decisive factor of damage effect to the mammary gland, defining the level of biochemical transformations and initiating of peroxide processes.

Development of a potassium-based soil washing solution using response surface methodology for efficient removal of cesium contamination in soil

The overuse of chelating soil washing agents for removal of heavy metal can release soil nutrients and negatively affect organisms. Therefore, developing novel washing agents that can overcome these shortcomings is necessary. In this study, we tested potassium as a main solute of novel washing agent for cesium-contaminated field soil, owing to the physicochemical similarities between potassium and cesium. Response surface methodology was combined with a four-factor, three-level Box–Behnken design to determine the superlative washing conditions of the potassium-based solution for the removal of cesium from the soil. The parameters that were considered were the following: potassium concentration, liquid-to-soil ratio, washing time, and pH. Twenty-seven sets of experiments were conducted using the Box–Behnken design, and a second-order polynomial regression equation model was obtained from the results. Analysis of variance proved the significance and goodness of fit of the derived model. Three-dimensional response surface plots displayed the results of each parameter and their reciprocal interactions. The washing conditions that achieved the highest cesium removal efficiency (81.3%) in field soil contaminated at 1.47 mg/kg were determined to be the following: a potassium concentration of 1 M, a liquid-to-soil ratio of 20, washing time of 2 h, and a pH of 2.

Study of the Spectral Analyzes Radioactivity in Soils for Elected Regions in Diyala Province (Iraq)

In this current review, 18 examples of surface soils are taken from various regions from Diyala Province. Diyala Province is stay in eastern Iraq, 57 km away from the capital Baghdad, northward. All soil samples are assembling from an external perspective of the soil by utilizing sifter by then set 1 kg was taken from each sample. The ORTIC MCB radiation detector was used, where one kilogram of soil was placed that was filtered and cleaned well and for two hours for each examination sample and six natural radionuclides were obtained inside each soil sample examined. Through the detection and laboratory results that we conducted, we found that presence of the cesium-137 contamination element was not observed in the samples taken. The ordinary unequivocal activities of the radionuclides in Diyala samples are within the permitted ran, which means that the soil in those areas does not contain high amounts of radioactivity and can be cultivated naturally without fear of side effects as a result of the radiation falling from the universe.

Distribution of strontium-90 in soils affected by Fukushima dai-ichi nuclear power station accident in the context of cesium-137 contamination

90Sr and 137Cs activity concentrations were determined by radiometric methods in 76 soil samples (soil, litter, rain gutter deposit, and roadside sediment samples) affected by the Fukushima Dai-ichi Nuclear Power Station (FDNPS) accident and collected from the Fukushima exclusion zone. The 90Sr and 137Cs activity concentrations were in the range of 3 to 1050 Bq kg−1 (median 82 Bq·kg−1) and 0.7 to 6770 kBq·kg−1 (median 890 kBq·kg−1), respectively (decay correction date: March 15, 2011). A strong positive correlation was found between 90Sr and 137Cs activity concentration and higher mobility of 90Sr was confirmed in Japanese soil samples. The activity ratio of 90Sr/137Cs in 85% of all samples was in the range of 5.0 × 10−5 to 5.0 × 10−4 with a median of 1.2 × 10−4. From the activity ratio values it was concluded that the 90Sr released to the atmosphere was only around 0.0003–0.02 PBq which is negligible compared to the Chernobyl accident (∼10 PBq) or other nuclear accident contaminations. From the standpoints of radioecology and radiation safety, 137Cs remains the primary pollutant of the FDNPS accident.

Applicability of non-destructive equipment for radioactivity measurement to screening radio-cesium in foods

This study aimed to evaluate the applicability of non-destructive radioactivity measurement equipments for screening radio-cesium in whole foods without sample preparation procedures. Wild mushrooms and bamboo shoots were collected and studied using five different non-destructive radioactivity devices, and activity concentration was determined by conventional gamma-ray spectrometry using a Ge-detector. Linear regression analyses of activity concentrations were conducted and prediction intervals determined as uncertainties. Overall, non-destructive radioactivity measurement devices found to be suitable for screening radioactive cesium contamination in foods with an effective screening level.

Strontium and cesium contamination behavior on Q235b carbon steel of radioactive liquid waste tank in alkaline environment

Strontium and cesium contamination behavior on Q235b carbon steel of radioactive liquid waste tank in alkaline environment

Удельные затраты воды при промывке радиоактивно загрязненных почв

The purpose of the study is to increase the efficiency of irrigation reclamation, measures aimed at reducing the dose of external and internal radiation to people in radioactively contaminated areas. The main purpose of our research is the economical and efficient use of water resources, the search or creation of abundant and clean sources of irrigation from radioactive contamination. Their use for the purification of soils contaminated with cesium‑137, taking into account the danger of spotty nature of contamination of territories. The need for more thorough research and analysis in the use of water resources for washing soils from radioactive contamination has been established. The specific water consumption during soil washing from cesium contamination is analyzed. Soil samples taken in Novozybkovsky, Gordeevsky, Zlynkovsky and other districts of the Bryansk region, which were exposed to the greatest radioactive contamination, were studied. A general analysis of the availability of water resources in the Bryansk region is given. It was revealed that the Novozybkovsky district is highly polluted, densely populated and has fewer water resources than in other districts. There is an urgent need to save water and, as a consequence, the use of chemical meliorants, which reduce the content of Cs‑137 in the crop by 5‑7 times and improve the filtration properties of soils. Washing of radioactively contaminated soils should be practiced on small areas in private subsidiary farms, using meltwater to wash soils from cesium contamination. It was found that during the formation of snow cover, a powerful layer of snow accumulates in the catchment area of a closed depression, which, when melting, creates abundant washing norms, above the area of black spots, at the bottom of depressions, the formation of such a washing regime does not require large expenditures.

Fuzzy membership function for weighting pairs in variographical analysis

Prior to mapping a regionalized variable by geostatistical interpolators, variographical analysis should be performed to quantify the spatial variability of sampled values. Variographical analysis is based on pairing the samples, calculating a measure of dissimilarity between the paired samples and averaging them, called semi-variogram. Since averaging is a sensitive operator to the extreme values, the semi-variogram might show instabilities if the database contains extreme values, for example when its statistical distribution is lognormal. In addition, in case the sample locations are irregularly spaced, the directional sample pairing might not find sufficient number of pairs in some directions, so average of the pair’s dissimilarities might not be representative. In order to reduce the instability of semi-variograms, fuzzy membership function is proposed in this article to weight the sample pairs according to the vector of variography. The script of fuzzy variographical analysis is developed in the Python language, and is tested on the soil samples acquired in the Fukushima region in 2011 to monitor cesium contamination in the top soil. It is illustrated that the fuzzy semi-variogram is more coherent in different directions and lag distances, hence more certain to be used for anisotropy modeling without manual masking of heterogeneous samples. So, fuzzy semi-variogram could be the right choice for automatic fitting of mathematical models. At the end, kriging interpolation based on classic and fuzzy semi-variograms is compared qualitatively and quantitatively, indicating the reduce of interpolation error by about 50%.

Radioactive cesium contamination in persimmon tree after Fukushima Daiichi Nuclear Power Plant accident – the difference of radioactive cesium concentration of fruit on each branch in the same tree

Radioactive cesium contamination in persimmon tree after Fukushima Daiichi Nuclear Power Plant accident – the difference of radioactive cesium concentration of fruit on each branch in the same tree

COMPLEX RADIATION AND HYGIENIC MONITORING OF POPULATION ON RADIOLOGICALLY CONTAMINATED TERRITORIES OF ZHYTOMYR OBLAST IN 2021.

the key factors identification in radiation dose formation in population of radiologically contaminatedareas of Zhytomyr oblast in the current period of accident through complex radiation and hygienic monitoring in reference settlements in 2021. For complex radiationhygienic monitoring in Zhytomyr oblast, 10 settlements were chosen - Narodychi, Selets, Bazar, Rudnya Bazarska, Khrystynivka - zone 2, Motiyki, Zalissya, Davydky, Radcha, Nova Radcha - zone 3 of Narodychi district, in which the highest radiation doses were recorded after the accident at the Chornobyl Nuclear Power Plant. The research was carried out in June 2021. In order to determine the doses of internal radiation, 645 measurements were performed on whole body counters (WBC) (478 adults and 167 children). The 44 samples of milk, 45 samples of potatoes and vegetables, and 38 samples of wild products were collected in local farms and measured for the 137Cs and 90Sr content. Residents of the studied settlements (n = 220, 175 adults, and 45 children) were interviewed about the levels of consumption of staple foodstuffs. External radiation doses were evaluated in all the studied settlements. Mathematical, dosimetry, and radiochemical methods were applied. Annual effective radiation doses of Zhytomyr oblast population in 2021 were formedmainly due to internal radiation ones that not exceeded 1.8 mSv * year-1 in adults and 0.5 mSv * year-1 in children against the radiologically contaminated territories (RCT) criterion of 1 mSv * year-1. Intake of 137Cs with milk and wild mushrooms, which traditionally occupy a significant part of diet in Zhytomyr oblast area and have consistently high levels of radioactive cesium contamination, remains a key factor of internal radiation dose forming in residents of the surveyed settlements of Zhytomyr oblast.

137 Cs contaminations in wild-growing medicinal plants of Zhytomyr polissya forests: A 34 years after Chernobyl accident

The contamination of 137Cs in wild-growing medicinal plants was studied with regards to the species, type of forest vegetation conditions and soil specific activity of 137Cs in Zhytomyr polissya forest phytocenoses (Ukraine). The research was carried out in two plots planted in the most region typical edatopes - fresh and wet subor (Querceto-Pinetum). Species composition of phytocenoses was analyzed and the plants that can be harvested for pharmaceutical industry were identified on these test plots,. The herbal substance samples were tested to determine the specific activity of 137Cs. The studies have shown significant variability in the content of radionuclides due to differences in the level of radioactive contamination in the soil and accumulative capacity of plant species. For European blueberry, the peculiarities of 137Cs accumulation in vegetative and generative organs were studied. Comparison of the content of 137Cs in pants of different edatopes showed more higher intensity of radionuclide accumulation in wet suborbs compared to fresh suborbs. The average values of concentration factors were calculated and their rankings were built according to the intensity of 137Cs accumulation for the plants in each edatope. All studied medicinal plants were divided into four groups according to the contration factor: with weak accumulation, moderate accumulation, strong accumulation, and very strong accumulation. Based on the permissible content of 137Cs in wild-growing medicinal plants (600 Bq/kg), the maximum permissible level of soil contamination with radionuclides was determined for each medicinal plant species.

In situ measurement of cesium-137 contamination in fruits from the northern Marshall Islands

Radioactive contamination of fruits in the northern Marshall Islands, resulting from the US nuclear weapons testing program in the 1940s and 1950s, is still a human health concern, in particular pertaining to island population resettlement and the economic benefit from farming. Over 200 fruits, primarily coconuts and pandanus, were collected on 11 islands from four atolls in the northern Marshall Islands in 2017. The energy spectra from nuclear gamma decays were measured on a research vessel for each fruit in situ. From these recordings, the level of cesium-137 (137Cs) contamination was determined for individual fruits. Comparisons of the results are made to past studies and international food safety standards. There is a broad distribution of values, ranging from below detectable radiation levels to relatively high levels; safety concerns are largest for Bikini Island. A noticeable fraction of fruits from Bikini have significantly higher levels of 137Cs contamination compared with those from all other measured islands.

Remediation of 137Cs-contaminated concrete rubble by supercritical CO2 extraction

The removal of cesium contamination is a critical issue for the recycling of concrete rubble in most decommissioning operations. The high solvent strength and diffusivity of supercritical CO2 make it an attractive choice as vector for extractant system in this context. Experimental extraction runs have been carried out in a radioactive environment on rubble contaminated with 137Cs. The best extraction system was found to be CalixOctyl (25,27-Bis(1-octyloxy)calix[4]arene-crown-6, 1,3-alternate) with pentadecafluorooctanoic acid as a modifier. The effects of various operating parameters were investigated, namely the coarseness of rubble, the temperature of supercritical CO2, the residual water and initial cesium concentrations, and the amounts of extractant and modifier used. The yields from direct extraction were low (<30%), because of the virtually irreversible sorption of Cs in concrete. The best extraction yield of ∼55% was achieved by leaching concrete rubble with nitric acid prior to supercritical CO2 extraction.

Представление архивной информации о ликвидации последствий радиационных аварий на интернет-портале

Purpose: To describe the historical experience of overcoming the consequences of radiation accidents for the environment, and also to enable the remote user independently obtain data on the radiation contamination of areas through the Internet-portal implemented within the Interdepartmental Information System on the issues of radiation safety and radiation problems.&#x0D; Material and methods: Specialists have collected a large volume of information obtained during expedition inspections of contaminated areas, starting in 1986 – the moment of the radiation accident at the Chernobyl NPP – and ending with 2015 (the year of the 30th anniversary of the accident), an array of paper official documents of different levels of hierarchy (departmental, interdepartmental, governmental). The Catalog of documents is composed in such a way that at each level one can get acquainted with the list of documents, with the meta-description of documents, with the original scanned source document (by reference given in the meta description).The scientific task of creating an information system, containing archival information, included the development of two groups of criteria for selecting information. All information was firstly analyzed by experts on two criteria: openness (a status that does not currently have restrictions on publication) and historical affiliation. The documents of this group include information from 1986 up to 2012. Then the criteria for assigning information to a particular group were developed. &#x0D; Results: This work, for the first time, enables the remote user to obtain reliable data on radiation contamination independently. The user can know the years of the first and last inspection of the selected settlement, average density of cesium-137 contamination in the year of interest, as well as information on the number of samples taken in the year of interest. All data on the content of 137Cs obtained at different times are recalculated to the indicated single date (as of January 1 of each year), taking into account the correction for the radioactive decay of this radionuclide. In addition, the user can find out in the zone of which pollution category, approved by the Government List, is the locality indicated by the user. &#x0D; Conclusion: Thus, the approach of presenting information on a specialized Internet-portal allows us to consider it as a tool for analyzing decisions taken. This approach allowed us to see the overall picture of efforts to overcome the consequences of a radiation accident. In the case of large scale radiation accidents and the adoption of many unconventional solutions at all levels of the hierarchy, this experience available to the remote user is crucial importance. The approach to the presentation of archival information on the overcome of the consequences of radiation accidents through Internet-portal showed the urgency of presenting the efforts of management, specialists and various services to overcome the consequences of such accidents with the help of a systematic array of historical documents. The users’ appeals to the Internet-portal through page of Rosgydromet are recorded in the Journal of events. It tells about the expediency of this work. Address of electronic archive is following: http://rb.mchs.gov.ru/rosgidromet/Archive. The link of reference services is following: http://rb.mchs.gov.ru/rosgidromet/rg_spravochnie_uslugi.

“Caddisfly watch,” a biomonitoring program using Stenopsyche larvae to determine radioactive cesium contamination in rivers following the Fukushima nuclear disaster

The “Caddisfly Watch” program proposes the use of larvae of the caddisfly genus Stenopsyche (Trichoptera: Stenopsychidae) to monitor the radioactive cesium (137Cs) pollution, including that of suspended solids, in river environments, as a simple method was essential for this following the Fukushima nuclear disaster in March 2011. A variety of aquatic organisms were collected from rivers in Japan in 2012 and their levels of radioactive Cs measured. Amongst all the organisms collected, the highest concentrations of 137Cs were observed in caddisfly larvae. These larvae occur at a high density and can be collected at regular intervals in most rivers throughout Japan. It is proposed that caddisfly larvae can be used as bioindicators of radioactive Cs contamination in rivers, as their temporal and spatial changes are easily assessed.

Cesium-137 contamination of river food webs in a gradient of initial fallout deposition in Fukushima, Japan

We examined the cesium-137 (137Cs) contamination of river food webs in a gradient of initial fallout deposition (net density estimates 2.5–3.5 months after the Fukushima Daiichi Nuclear Power Plant accident in March 2011), in Fukushima Prefecture, Japan. Litter, aquatic insects, and salmonid fish were collected in five headwater stream reaches (watershed-average fallout density, 368.1–1398.4 kBq/m2) for the measurement of 137Cs concentration and stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) in June 2014. The stable isotope ratios suggested that the detrital food chain was a dominant energy pathway in rivers originating from a basal resource (litter) to primary (aquatic insects) and secondary (fish) consumers. The 137Cs concentration decreased with an increase in the trophic level, with the highest value for litter (10930 ± 5381 Bq/kg, mean ± SD), the lowest for fish (2825 ± 2451 Bq/kg), and the intermediate one for dominant (numerically and biomass-wise) detritivorous insect, Ephemera japonica McLachlan (4605 ± 1970 Bq/kg). 137Cs concentrations of three trophic levels were linearly predicted by the initial fallout amount of 137Cs. The evacuation of the gut contents of E. japonica during field experiments led to a reduction in their 137Cs concentration by approximately 50% within 1–2 day(s) without loss of body weight. This suggested that a substantial portion of 137Cs contamination of E. japonica was derived from highly contaminated fine solids deposited in depositional habitats at a disproportionately high density. Overall, the initial fallout amount of 137Cs was helpful in roughly predicting the contamination levels of headwater river-riparian ecosystems with the detrital food chain as a dominant energy pathway. Long-term monitoring of the dynamics and fates of 137Cs associated with fine organic and inorganic particulates appears important for better prediction of 137Cs contamination of food webs in forested headwater streams.

First On-Site True Gamma-Ray Imaging-Spectroscopy of Contamination near Fukushima Plant

We have developed an Electron Tracking Compton Camera (ETCC), which provides a well-defined Point Spread Function (PSF) by reconstructing a direction of each gamma as a point and realizes simultaneous measurement of brightness and spectrum of MeV gamma-rays for the first time. Here, we present the results of our on-site pilot gamma-imaging-spectroscopy with ETCC at three contaminated locations in the vicinity of the Fukushima Daiichi Nuclear Power Plants in Japan in 2014. The obtained distribution of brightness (or emissivity) with remote-sensing observations is unambiguously converted into the dose distribution. We confirm that the dose distribution is consistent with the one taken by conventional mapping measurements with a dosimeter physically placed at each grid point. Furthermore, its imaging spectroscopy, boosted by Compton-edge-free spectra, reveals complex radioactive features in a quantitative manner around each individual target point in the background-dominated environment. Notably, we successfully identify a “micro hot spot” of residual caesium contamination even in an already decontaminated area. These results show that the ETCC performs exactly as the geometrical optics predicts, demonstrates its versatility in the field radiation measurement, and reveals potentials for application in many fields, including the nuclear industry, medical field, and astronomy.

Evaluation of a method for removing cesium and reducing the volume of leaf litter from broad-leaved trees contaminated by the Fukushima Daiichi nuclear accident during the Great East Japan Earthquake

The town of Marumori in southern Miyagi Prefecture borders on Fukushima Prefecture, and following the accident at the Fukushima Daiichi nuclear power plant, there were concerns about cesium deposition in forested areas. One of the authors of this paper has continually surveyed leaf litter from the forested areas. As leaf litter may be a source of cesium contamination from the forest to downstream areas, we considered a simplified version of wet oxidation, a method previously presented by one of the authors of this study, as a technology to reduce leaf litter weight and cesium concentration, separating radioactive nuclides from non-radioactive ones, in leaf litter. We tested our method in three experiments. Experiment 1 used new leaf litter (232 Bq/kg) from the surface of a small stream at the forest edge nearby an area with air dose level higher than the national standard threshold of 0.23 μSv/h for the implementation of governmental decontamination works. Experiment 2 applied wet oxidation to older leaf litter (705 Bq/kg) harvested from a pasture nearby the stream mentioned above. We also used the same leaf litter in experiment 3 for a cesium release tests using pure water. In experiment 1 and 2 we treated leaf litter with a sodium hypochlorite solution, optimizing sodium hypochlorite concentration and reaction temperature. We measured a 50–60% decrease in the leaf litter weight and a 60% decrease in the cesium concentration. Moreover, we also measured the amount of cesium washout. The cesium budget of experiment 1 showed no cesium gasification (wet oxidation avoids airborne cesium as this element is prone to be volatile at 600 °C), and that high sodium hypochlorite concentration and high temperature had a strong positive effect on leaf litter volume reduction and cesium decontamination. Experiment 2 confirmed the reproducibility of these results in leaves with different cesium concentration and harvested in different conditions. We could also explain the mechanism behind leaf litter weight and cesium concentration reduction. Experiment 3 helped us to investigate the effects of the matter present on the surface of the water and the contribution of water soluble cesium. Concurrent experiments on changes in leaf litter chemical composition confirmed that our modified wet oxidation method had an effect on the removal of acid-insoluble lignin. Removal of lignin, a refractory component, might allow for a better utilization of the residue left after implementation of the proposed simplified wet oxidation. Thus, real wastes could be smaller than the residues. Together with the observed smaller cesium concentration in the residue, the proposed method in this study is expected to contribute to mitigate the risk due to the fallen leaves containing cesium.

Nutrient Status in Composts and Changes in Radioactive Cesium Following the Fukushima Daiichi Nuclear Power Plant Accident

Following the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, the forests in the Fukushima area were highly contaminated with radiocesium (137Cs and 134Cs). Therefore, there is a need to develop strategies for remediation of the contaminated forests. We assessed changes in radioactive cesium (134Cs and 137Cs) contamination and nutrient status in composts derived from wood chip, bamboo leaf and bamboo powder using rice bran and wheat meal as sub-materials. Changes in soil properties and Komatsuna (Brassica rapa var. perviridis) growth were also investigated due the application of composts and initial materials at 0, 2.5, 5 and 10 kg·m−2 input levels. Mixing of sub-materials significantly reduced the concentration of radioactive Cs and improved compost quality. The effectiveness of three composts on soil quality improvement varied depending on their types and rates of applications. Amendments of bamboo leaf composts at 10 kg·m−2 resulted in the significantly highest soil inorganic N, available P and exchangeable K contents. Amendments of final composts also enhanced Komatsuna growth. Furthermore, radioactive Cs contaminations of the Komatsuna plants grown in these composts were below 0.1 Bq·kg−1. This study may help to remediate the forests contaminated with radiocesium in the Fukushima area while improving the soil organic matter content to enhance soil sustainability.

Analysis of the accumulation and redistribution patterns of cesium in Vicia faba grown on contaminated soils

The aim of this study was to investigate the relationship between cesium (Cs) contamination and plant growing stages in crops or vegetables grown on Cs-contaminated soils. Vicia faba was grown on Cs-contaminated soils under pot-culture conditions, and Cs uptake and bioaccumulation at various growing stages were then measured. The results showed that Cs uptake by V. faba was significantly greater on soils with a higher Cs content. As shown by the bioaccumulation factor (BCF), the highest transfer coefficient occurred when V. faba reached the maturation stage. Cs was easily transferred to young organs, especially seeds, with an average percentage of 9.60% in seeds during the maturation stage. This implies that Cs can be transferred to the human food chain at all growth stages of the plant, especially the last stages. Uptake rates of Cs remained stable during the generative growth phase of V. faba. This implies that the cultivation of varieties with short generative growth periods can reduce Cs accumulation in the edible parts of plants.