Radioactive contamination resulting from major nuclear accidents presents harsh environmental conditions. Inside the Chernobyl exclusion zone, even more than 30 years after the accident, the ...resulting contamination levels still does not allow land-use or human dwellings. To study the potential of basidiomycete fungi to survive the conditions, a field trial was set up 5 km south-south-west of the destroyed reactor unit. A model basidiomycete, the lignicolous fungus Schizophyllum commune, was inoculated and survival in the soil could be verified. Indeed, one year after inoculation, the fungus was still observed using DNA-dependent techniques. Growth led to spread at a high rate, with approximately 8 mm per day. This shows that also white-rot basidiomycetes can survive the harsh conditions in soil inside the Chernobyl exclusion zone. The unadapted fungal strain showed the ability to grow and thrive in the contaminated soil where both stress from radiation and heavy metals were present.
Test field site within the Czenobyl Exclusion Zone Display omitted
•A field trial was performed in the Czernobyl Exclusion Zone.
•The wood-rotting basidiomycete Schizophyllum commune could survive in the soil.
•It was present half a year and a year after inoculation.
•It even spread with up to 8 mm/day.
•This enables future approaches in mycoremediation.
•137Cs long-term wash-off from Chernobyl and Fukushima catchments has been studied.•Dissolved 137Cs wash-off ratio in Fukushima is substantially less than in Chernobyl.•Semiempirical diffusional ...model of radionuclide wash-off has been formulated.•137Cs wash-off after two accidents is adequately predicted by the proposed model.
We analyzed mid- to long-term 137Cs wash-off from the catchments contaminated due to the Chernobyl accident in 1986 and the Fukushima Dai-ichi Nuclear Power Plant accident in 2011. A semi-empirical diffusional model for radionuclide wash-off is proposed to enable estimation of the dissolved and particulate 137Cs wash-off ratios for the Chernobyl and Fukushima contaminated catchments; the differences in the wash-off characteristics for these two regions are explained and their long-term trends predicted. The model is based on the premise that the catchment topsoil layer is the source of sediments in the rivers, and the radionuclide concentration in the topsoil can be described by a simple diffusion equation. The particulate 137Cs wash-off ratios for the Fukushima contaminated catchments appear to be comparable or slightly lower than those for Chernobyl. The dissolved 137Cs wash-off ratios for Fukushima catchments are at least an order of magnitude lower than those for Chernobyl, mainly due to an order of magnitude difference in the 137Cs distribution coefficients for the Fukushima and Chernobyl rivers. The proposed semi-empirical diffusional model for radionuclide wash-off satisfactorily describes the temporal trends in the 137Cs wash-off characteristics for both the Chernobyl and Fukushima cases, and can be used as a tool for predicting 137Cs wash-off after a nuclear accident.
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There is a dilemma whether the Chernobyl accident is the main source of this anthropogenic radionuclide in the region of Vojvodina, Northern Province of Serbia. The difference compared to the other ...dominant source of radiocaesium in the environment, the nuclear weapon tests, is lying in the local character of contamination due to accidents, which implies it’s highly dependent on meteorological parameters, such as precipitation and wind in the area at that time. According to published data, the average value of surface contamination by radiocaesium on the territory of the former Yugoslavia after the Chernobyl accident was several times higher than the estimated contamination by nuclear testing (1945–1963). The main aim of this research is to explore possible correlations of the spatial distribution of precipitation from April 1986 to December 1987 with the deposition of radiocaesium in the surface soil to justify this claim in the absence of data on caesium deposition before the Chernobyl accident for the Vojvodina region. The database of 137Cs content in Vojvodina soil and precipitation for this region during the timeframe of interest were used. From a total of 245 precipitation stations in Vojvodina, 164 to 244 precipitation stations were selected for analysis in conditionals from different time scale aspects and data validation. The best correlation between amounts of total precipitation and 137Cs content in surface soil obtained for two rainy periods 2nd-5th and 7th-21st May 1986. Further cluster analysis separated four different regions according to 137Cs deposition and precipitation for the mentioned rainy period which could be applied in the field of soil erosion assessment on the local and regional level.
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•Vojvodina 137Cs fallout Chernobyl accident or nuclear weapon testing originated.•Correlations of precipitation in 1986/87 and 137Cs deposition densities.•The periods 2nd to 5th and 7th to May 21, 1986 best correlated with 137Cs in soil.•Four regions in Vojvodina were derived by cluster analysis of two sets of data.•The results were validated by reconstruction of the winds aloft directions.
Genetic and epigenetic changes were investigated in chronically irradiated Scots pine (Pinus sylvestris L.) populations from territories that were heavily contaminated by radionuclides as result of ...the Chernobyl Nuclear Power Plant accident. In comparison to the reference site, the genetic diversity revealed by electrophoretic mobility of AFLPs was found to be significantly higher at the radioactively contaminated areas. In addition, the genome of pine trees was significantly hypermethylated at 4 of the 7 affected sites.
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•Chronic radiation exposure changes the genetic structure of plant populations.•Genomes of irradiated pines are hypermethylated.•The level of hypermethylation does not depend on annual dose.
These results indicate that even relatively low levels of chronic radiation exposure can influence on the genetic characteristics and the methylation status of natural pine populations and that it should be considered as an important ecological factor reflecting the anthropogenic impact on ecosystems.
•External chronic radiation and internally incorporated radionuclides after Chernobyl accident induce genome instability in the plant genome.•Induced DNA strand breaks were efficiently repaired at ...the soybean cotyledon stage.•Development of a new experimental design of the Methylation-sensitive comet assay adapted for a plant model system.•A slight fluctuation in the CCGG methylation pattern was connected with adaptation capacity in Chernobyl plants.
This pilot study was carried out to assess the effect of radio-contaminated Chernobyl environment on plant genome integrity 27 years after the accident. For this purpose, nuclei were isolated from root tips of the soybean seedlings harvested from plants grown in the Chernobyl area for seven generations. Neutral, neutral-alkaline, and methylation-sensitive comet assays were performed to evaluate the induction and repair of primary DNA damage and the epigenetic contribution to stress adaptation mechanisms. An increased level of single and double strand breaks in the radio-contaminated Chernobyl seedlings at the stage of primary root development was detected in comparison to the controls. However, the kinetics of the recovery of DNA breaks of radio-contaminated Chernobyl samples revealed that lesions were efficiently repaired at the stage of cotyledon. Methylation-sensitive comet assay revealed comparable levels in the CCGG methylation pattern between control and radio-contaminated samples with a slight increase of approximately 10% in the latter ones. The obtained preliminary data allow us to speculate about the onset of mechanisms providing an adaptation potential to the accumulated internal irradiation after the Chernobyl accident.
Despite the limitations of this study, we showed that comet assay is a sensitive and flexible technique which can be efficiently used for genotoxic screening of plant specimens in natural and human-made radio-contaminated areas, as well as for safety monitoring of agricultural products.
The release of the television series Chernobyl (HBO, Sky Atlantic 2019) drew renewed attention to the tragedy, its locations, and the affected population, generating new productions in Russia, such ...as the film Chernobyl: Abyss (Danila Kozlovskij, 2021), explicitly made in response to the Western series, signalling a desire to re-appropriate the narrative of the disaster and its territories. Indeed, a recurrent characteristic of the film and television productions of the countries most affected by the 1986 nuclear disaster (Ukraine, Belarus, and Russia) has been the representation of the land and the inhabitants’ relationship with it (Lindbladh 2019). This is also a central theme in Svetlana Alexievich’s renowned 1997 work Voices from Chernobyl: Chronicle of the future, whose stories inspired some episodes of the Anglo-American series. This article analyzes the representation of the relationship between the inhabitants of the Chornobyl/Chernobyl Exclusion Zone and their homeland in film and television productions dedicated to the nuclear disaster, beginning with Eastern European films made in the early 1990s, moving on to the representation in the Western series, and culminating with an analysis of Kozlovskij’s Chernobyl: Abyss. Features considered include the development of romantic narratives within the contaminated zone, the visual representation of radiation, and the depiction of the local institutions’ response to the disaster.
The release of the television series Chernobyl (HBO, Sky Atlantic 2019) drew renewed attention to the tragedy, its locations, and the affected population, generating new productions in Russia, such as the film Chernobyl: Abyss (Danila Kozlovskij, 2021), explicitly made in response to the Western series, signalling a desire to re-appropriate the narrative of the disaster and its territories. Indeed, a recurrent characteristic of the film and television productions of the countries most affected by the 1986 nuclear disaster (Ukraine, Belarus, and Russia) has been the representation of the land and the inhabitants’ relationship with it (Lindbladh 2019). This is also a central theme in Svetlana Alexievich’s renowned 1997 work Voices from Chernobyl: Chronicle of the future, whose stories inspired some episodes of the Anglo-American series. This article analyzes the representation of the relationship between the inhabitants of the Chornobyl/Chernobyl Exclusion Zone and their homeland in film and television productions dedicated to the nuclear disaster, beginning with Eastern European films made in the early 1990s, moving on to the representation in the Western series, and culminating with an analysis of Kozlovskij’s Chernobyl: Abyss. Features considered include the development of romantic narratives within the contaminated zone, the visual representation of radiation, and the depiction of the local institutions’ response to the disaster.
The release of the television series Chernobyl (HBO, Sky Atlantic 2019) drew renewed attention to the tragedy, its locations, and the affected population, generating new productions in Russia, such as the film Chernobyl: Abyss (Danila Kozlovskij, 2021), explicitly made in response to the Western series, signalling a desire to re-appropriate the narrative of the disaster and its territories. Indeed, a recurrent characteristic of the film and television productions of the countries most affected by the 1986 nuclear disaster (Ukraine, Belarus, and Russia) has been the representation of the land and the inhabitants’ relationship with it (Lindbladh 2019). This is also a central theme in Svetlana Alexievich’s renowned 1997 work Voices from Chernobyl: Chronicle of the future, whose stories inspired some episodes of the Anglo-American series. This article analyzes the representation of the relationship between the inhabitants of the Chornobyl/Chernobyl Exclusion Zone and their homeland in film and television productions dedicated to the nuclear disaster, beginning with Eastern European films made in the early 1990s, moving on to the representation in the Western series, and culminating with an analysis of Kozlovskij’s Chernobyl: Abyss. Features considered include the development of romantic narratives within the contaminated zone, the visual representation of radiation, and the depiction of the local institutions’ response to the disaster.
The release of the television series Chernobyl (HBO, Sky Atlantic 2019) drew renewed attention to the tragedy, its locations, and the affected population, generating new productions in Russia, such as the film Chernobyl: Abyss (Danila Kozlovskij, 2021), explicitly made in response to the Western series, signalling a desire to re-appropriate the narrative of the disaster and its territories. Indeed, a recurrent characteristic of the film and television productions of the countries most affected by the 1986 nuclear disaster (Ukraine, Belarus, and Russia) has been the representation of the land and the inhabitants’ relationship with it (Lindbladh 2019). This is also a central theme in Svetlana Alexievich’s renowned 1997 work Voices from Chernobyl: Chronicle of the future, whose stories inspired some episodes of the Anglo-American series. This article analyzes the representation of the relationship between the inhabitants of the Chornobyl/Chernobyl Exclusion Zone and their homeland in film and television productions dedicated to the nuclear disaster, beginning with Eastern European films made in the early 1990s, moving on to the representation in the Western series, and culminating with an analysis of Kozlovskij’s Chernobyl: Abyss. Features considered include the development of romantic narratives within the contaminated zone, the visual representation of radiation, and the depiction of the local institutions’ response to the disaster.
Abstract
Background
Pregnancy and lactation may constitute radiation-sensitive reproductive periods due to rapid cell proliferation and concentration of radioiodine in the lactating breast. However, ...there are limited epidemiological data among women exposed to radiation during these periods.
Methods
We examined incidence of breast cancer in a cohort of 3214 women who were pregnant and/or lactating within 2 months (26 April to 30 June 1986) of the Chernobyl accident and residing in contaminated regions of Belarus. There were 33 breast cancers identified through linkage with the Belarusian National Cancer Registry. Breast cancer rates among women who were either pregnant and/or lactating were compared with population rates by calculating standardized incidence ratios (SIR) and 95% confidence intervals (CI) adjusting for attained age, oblast, urban/rural residence and calendar year.
Results
Among women who were lactating, we found a greater than 2-fold increased risk of breast cancer compared with the general population, SIR = 2.49 (95% CI: 1.55, 3.75). In contrast, women who were pregnant were not at increased risk (SIR = 0.84 95% CI: 0.46, 1.38). The SIR was highest in women who were exposed at a younger age and at the earliest time period since the accident, though stratified analyses had limited sample sizes.
Conclusions
We found a significantly increased risk of breast cancer among women residing in contaminated areas of Belarus who were lactating at the time of the accident and may have had elevated exposure to radioiodine, when compared with the general population. Studies of breast cancer with individual radiation dose estimates among women exposed during lactation are warranted.
•A detailed chronicle on dosimetry after the Chernobyl and Fukushima accidents.•A critical analysis of the weak points from the previous nuclear accidents.•Recommendations to improve dosimetry for ...decision making processes.•Applications of dosimetry in medical surveillance and preventive healthcare.
The experiences of the Chernobyl and Fukushima nuclear accidents showed that dosimetry was the essential tool in the emergency situation for decision making processes, such as evacuation and application of protective measures. However, at the consequent post-accidental phases, it was crucial also for medical health surveillance and in further adaptation to changed conditions with regards to radiation protection of the affected populations. This review provides an analysis of the experiences related to the role of dosimetry (dose measurements, assessment and reconstruction) regarding health preventive measures in the post-accidental periods on the examples of the major past nuclear accidents such as Chernobyl and Fukushima. Recommendations derived from the review are called to improve individual dose assessment in case of a radiological accident/incident and should be considered in advance as guidelines to follow for having better information. They are given as conclusions.
In the last three decades, an increase in thyroid cancer incidence has been observed worldwide, as well as in Lithuania. Although the rise was linked to overdiagnosis, the role of lifestyle and ...environmental factors, including exposure to ionizing radiation, cannot be excluded. In our retrospective study, we aimed to assess the association between the average age-specific thyroid dose due to the radioactive iodine uptake during childhood and adolescence from the Chernobyl fallout in Lithuania, and the trends of incidence of thyroid cancer from 1991 to 2015 in different regions. Averaged age-dependent thyroid doses were estimated for every municipality based on radioiodine activity in milk, reconstructed from available 131I activity measurements in the grass. Thyroid cancer incidence rates were calculated for the entire population and for two age at the time of exposure groups: 0–19 years and 0–9 years. Thyroid cancer relative risk (RR) was estimated for three municipality-specific thyroid dose (for 0-year-old babies) categories: less than 100 mGy (reference group), 100–199 mGy, and ≥200 mGy. Over the study period (1991–2015), a total of 5664 cases of thyroid cancer were registered in the entire Lithuanian population; 817 cases in the age group from 0 to 19 years at the time of the Chernobyl accident, and 266 cases in the age group from 0 to 9 years. Age-standardized thyroid cancer incidence rates have notably increased since 2000, peaked in 2009 (especially in females), and then slightly decreased and stabilized. The estimated average municipality-specific age-dependent thyroid doses ranged from 270 mGy in western Lithuania to 1.5 mGy in central and northern Lithuania. For the age group of 0–19 years at the time of the accident, in the period 1991–1995, the thyroid cancer relative risk was significantly increased (RR 3.91; 95 % CI: 1.27–10.29, p=0.01) in the highest dose category, compared to the lowest (although based on a small number of cases). For the age group 0–9 years at the time of the accident, a tendency of increased RR in the highest dose category appeared in the most recent period, 2011–2015. Our observations need to be confirmed by further following trends of thyroid cancer incidence in the cohort of 0–19-year-old Lithuanians at the time of the Chernobyl accident.
•The Chernobyl disaster had a long-term health impact on those exposed to radiation early in life.•The effects of this accident were far-reaching and continue to be studied to this day.•Reconstructed dose of 131I to the thyroid showed a wide range variation among Lithuania’s regions.•In areas with doses over 200 mGy in early life, thyroid cancer rates increased for both sexes.
This study evaluates the 131I transfer from ground deposition to the human thyroid gland after the Chernobyl accident using measurements of 131I concentrations in 1,252 soil, 124 grass, and 136 cow's ...milk samples as well as 131I thyroid activity measured in 3,100 individuals included in the Belarusian-American cohort. The following parameters of an 131I environmental transfer model used to calculate thyroid doses were evaluated in this study: (i) the interception factor of 131I by pasture grass, which was described by a purely empirical equation, (ii) the removal rate of 131I from pasture grass due to weathering and growth dilution, estimated to be 0.0676 d−1 (half-life of 10.3 d), (iii) the removal rate of 131I from cow's milk, estimated to be 0.0686 d−1 (half-life of 10.1 d), and (iv) the transfer coefficient of 131I from feed to cow's milk, arithmetic mean ± standard deviation of (6.7 ± 8.7) × 10−3 d L−1 (median = 4.0 × 10−3 d L−1). The individual model-based and measurement-based 131I thyroid activities for the Belarusian-American cohort members were calculated using different starting points of 131I transfer in the chain ‘ground deposition’ → ‘vegetation’ → ‘cow's milk’ → ‘human thyroid’, i.e., the measured 131I concentrations in soil, grass, and cow's milk. De novo thyroid doses from 131I for the 3,100 cohort members were calculated in this study using measured 131I activity concentrations in soil, grass, and cow's milk and were compared with those estimated previously for the same individuals using model-based 131I activity concentrations. It was shown that the use of measured instead of model-based 131I concentrations, in general, did not improve the measurement-based thyroid dose estimates. This is likely to be because there was already a good generic data base for the parameters used in this assessment. This finding indicates that, although the measurements of environmental samples are essential to estimate the parameter values of the 131I transfer model, the individual measurements of 131I thyroid activity are the most valuable information for estimating individual thyroid doses.
•131I transfer from ground deposition to the human thyroid gland was evaluated.•Parameters of an 131I environmental transfer model were evaluated.•The use of 131I concentrations measured in samples did not improve thyroid dose estimates.•Measurements of 131I thyroid activity are the most valuable source for estimating thyroid doses.
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