602 results match your criteria contaminated fukushima


Joint Environmental Radiation Survey by JAEA and KAERI Around the Fukushima Daiichi Nuclear Power Plant: Performance of Mobile Gamma-Ray Spectrometry Using Backpack and Carborne Survey Platforms.

Health Phys 2021 Sep 9. Epub 2021 Sep 9.

Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea Japan Atomic Energy Agency, Fukushima 975-0036, Japan Japan Atomic Energy Agency, Ibaraki 311-1206, Japan.

Abstract: According to the implementing arrangement between the Japan Atomic Energy Agency (JAEA) and the Korea Atomic Energy Research Institute (KAERI) in the field of radiation protection and environmental radiation monitoring, a joint survey program was performed to assess ground deposition of radioactive cesium in areas surrounding the Fukushima Daiichi Nuclear Power Plants. The purpose of this joint survey was to evaluate the field applications of the developed survey systems and methodologies. Understanding the performance of each system within a cesium-deposited contaminated zone is important for ensuring an appropriate response following a nuclear accident. Read More

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September 2021

Dynamics of radiocaesium within forests in Fukushima-results and analysis of a model inter-comparison.

J Environ Radioact 2021 Sep 8;238-239:106721. Epub 2021 Sep 8.

Andra, Research and Development Division, 1-7 Rue Jean-Monnet, 92298, Châtenay-Malabry cedex, France.

Forests cover approximately 70% of the area contaminated by the Fukushima Daiichi Nuclear Power Plant accident in 2011. Following this severe contamination event, radiocaesium (Cs) is anticipated to circulate within these forest ecosystems for several decades. Since the accident, a number of models have been constructed to evaluate the past and future dynamics of Cs in these forests. Read More

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September 2021

Selective Separation of Radiocesium from Complex Aqueous Matrices Using Dual Solid-Phase Extraction Systems.

J Chromatogr A 2021 Sep 14;1654:462476. Epub 2021 Aug 14.

Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan. Electronic address:

The release of radiocesium (r-Cs) into natural aqueous systems is of concern because of its extended solubility as an alkaline metal ion and its facile incorporation into living beings. A technique for the selective separation of Cs from an aqueous matrix using dual solid-phase extraction (SPE) systems in a series is proposed in this paper. The SPEs equipped with chelates (Nobias Chelate-PA1 and Nobias Chelate-PB1), an ion-exchange resin (Nobias Ion SC-1), or macrocycles (MetaSEP AnaLig Cs-01 and MetaSEP AnaLig Cs-02) were evaluated in terms of selectivity and retention/recovery behavior toward Cs and other potentially competing ions (Li, Na, K, Rb, Ba, Ca, Mg, and Sr). Read More

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September 2021

Scots pine stands biomass assessment using 3D data from unmanned aerial vehicle imagery in the Chernobyl Exclusion Zone.

J Environ Manage 2021 Oct 22;295:113319. Epub 2021 Jul 22.

State Specialized Enterprise Ecocentre, State Agency of Ukraine on Exclusion Zone Management, Shkil'na Str. 4, Chernobyl, Kyiv Region, 07270, Ukraine.

Thirty-five years after the accident, large forest areas in the Chernobyl Exclusion Zone still contain huge amounts of radionuclides released from the Chernobyl Nuclear Power Plant Unit 4 in April 1986. An assessment of the radiological and radioecological consequences of persistent radioactive contamination and development of remediation strategies for Chernobyl forests imply acquiring comprehensive data on their contamination levels and dynamics of biomass inventories. The most accurate forest inventory data can be obtained in ground timber cruises. Read More

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October 2021

Radiocesium leaching from litter during rainstorms in the Fukushima broadleaf forest.

Sci Total Environ 2021 Nov 8;796:148929. Epub 2021 Jul 8.

Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan; Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Ibaraki, Japan.

Forests are important sources of dissolved radiocesium (Cs) discharge downstream. To improve understanding of dissolved Cs discharge processes during rainstorms, we investigated the relationship between rainfall-runoff hydrological processes and the discharge of Cs leached from litter. Leaching tests were conducted with broadleaf litter collected in the area where saturated overland flow was generated during rainstorms in a broadleaf-tree-dominated forest. Read More

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November 2021

Migration behavior of radiostrontium and radiocesium in arid-region soil.

Chemosphere 2021 Oct 25;281:130953. Epub 2021 May 25.

Environmental and Life Sciences Research Center Kuwait Institute for Scientific Research, P. O. Box 24885, Safat, 13109, Kuwait.

The time-dependent of the average migration, depths and migration rates of radiostrontium and radiocesium were experimentally determined in sandy soil in Kuwait. The study aimed to describe the behavior of these radionuclides in typical soil types in Kuwait. Custom-made large-diameter lysimeters (30 cm) were constructed to hold about 70 kg of undisturbed soil. Read More

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October 2021

Individual quality and phenology mediate the effect of radioactive contamination on body temperature in Chernobyl barn swallows.

Ecol Evol 2021 Jul 2;11(13):9039-9048. Epub 2021 Jun 2.

Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life Sciences Beijing Normal University Beijing China.

Anthropogenic stressors, such as radioactive contaminants released from the Chernobyl and Fukushima Daiichi accidents, deteriorate ecological and evolutionary processes, as evidence for damaging effects of radioactive contamination on wildlife is accumulating. Yet little is known about physiological traits of animals inhabiting contaminated areas, and how those are affected by individual quality and phenology. We investigated variation in body temperature of wild barn swallows, , exposed to radioactive contamination from the Chernobyl accident in Ukraine and Belarus. Read More

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Evaluation of the antimicrobial effectiveness of ozonated water for handwashing in the presence of organic material contamination using the ASTM E2946-13 standard test method.

J Food Prot 2021 Jul 7. Epub 2021 Jul 7.

Department of Infection Control, Fukushima Medical University, Fukushima 960-1295 Japan.

Ozonated water is a possible handwashing alternative to antimicrobial soap and water. In a previous report, 4 ppm of ozonated water removed artificially contaminated bacteria from the hands of healthy volunteers as effectively as antimicrobial or non-antimicrobial soap and water. Currently, there is a lack of data on the efficacy of ozonated water in removing bacteria from hands loaded with organic materials. Read More

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Evaluation of tall fescue as a low radiocesium-uptake grass species to replace orchardgrass in Japan.

J Environ Radioact 2021 Oct 3;237:106694. Epub 2021 Jul 3.

Institute of Livestock and Grassland Science, National Agriculture and Food Research Organization, 768 Senbonmatsu, Nasushiobara, Tochigi, 329-2793, Japan.

Grasslands in Tohoku and North Kanto, Japan were contaminated with radiocesium released from the Fukushima Dai-ichi Nuclear Power Plant in March 2011. The dominant pasture species in the permanent grasslands of these areas is orchardgrass (Dactylis glomerata L.). Read More

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October 2021

Application of Finnish phlogopite to reduce radiocesium uptake by paddy rice.

J Environ Radioact 2021 Oct 26;237:106687. Epub 2021 Jun 26.

Tohoku Agricultural Research Center, National Agriculture and Food Research Organization, Fukushima, Fukushima, 960-2156, Japan.

Field and pot experiments were conducted to evaluate the effectiveness of coarse Finnish phlogopite application to reduce radiocesium uptake by paddy rice (Oryza sativa L.). The application of phlogopite was expected to reduce radiocesium uptake by crops through K supply and radiocesium retention. Read More

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October 2021

Influence of potassium-solubilizing bacteria on the growth and radiocesium phyto-transfer of Brassica rapa L. var. perviridis grown in contaminated Fukushima soils.

J Environ Radioact 2021 Oct 17;237:106682. Epub 2021 Jun 17.

Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-12 8509, Japan; The Faculty of Food and Agricultural Science, Fukushima University, Kanayagawa, Fukushima City, Fukushima, 960-1296, Japan.

The supply of K, being the chemical analog of Cs, affects the phytotransfer of radiocesium such as Cs from contaminated soils and its accumulation in plant tissues. Since K and Cs have high affinity to the same clay particle surfaces, the presence of potassium-solubilizing bacteria (KSB) could increase the availability of not only K in the rhizosphere but also of radiocesium. In this study, we obtained five KSB isolates with the highest solubilization capacities from soybean rhizosphere on modified Aleksandrov medium containing sericite as K source. Read More

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October 2021

Fukushima Daiichi decontamination and decommissioning: current status and challenges.

Authors:
Akira Ono

Ann ICRP 2021 Jun 18:1466453211010865. Epub 2021 Jun 18.

Tokyo Electric Power Company Holdings, 1-1-3 Uchisaiwai-cho, Chiyoda-ku, Tokyo, 100-8560, Japan; e-mail:

It has been nearly 10 years since the accident at Fukushima Daiichi nuclear power plant. With the cooperation of those involved, the site, which was once in a crisis situation, has improved to the point where it is possible to look ahead and proceed with work on schedule. In the off-site area, conditions for returning home have been progressed, and evacuation orders for some areas have been lifted by the Japanese Government. Read More

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Comparison of thyroid doses to the public from radioiodine following the Chernobyl and Fukushima accidents.

Ann ICRP 2021 Jun 10:1466453211006816. Epub 2021 Jun 10.

State Research Centre - Burnasyan Federal Medical Biophysical Centre, Federal Medical Biological Agency, Zhivopisnaya St. 46, 123098 Moscow, Russian Federation; e-mail:

Estimates of thyroid doses to the public from radioiodine intake following the accidents at Chernobyl and Fukushima Daiichi nuclear power plants are compared. The basis for thyroid dose estimates after the Chernobyl accident was a large set of measurements of I thyroidal content for approximately 400,000 residents in Belarus, Ukraine, and Russia. Due to a lack of direct thyroid measurements after the Fukushima accident (just over 1000 residents were measured), thyroid doses were estimated based on ecological models and are therefore associated with much higher uncertainty than those based on direct thyroid measurements. Read More

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Aggregated transfer factor of Cs in wild edible mushrooms collected in 2016-2020 for long-term internal dose assessment use.

J Environ Radioact 2021 Oct 31;237:106664. Epub 2021 May 31.

National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba, 263-8555, Japan.

Ingestion of edible wild mushrooms collected in areas contaminated with radiocesium released from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident may pose a risk of internal dose to their consumers. A species-specific aggregated transfer factor (T), which is calculated using radiocesium concentration in a wild mushroom species (Bq kg wet mass [WM]) divided by the total concentration in the soil surface area (Bq m), would be a useful tool to estimate the dose from wild mushrooms by ingestion. In this study, we especially focused on the T data collected in 2016-2020 to use these values for a long-term dose assessment. Read More

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October 2021

PROBABILISTIC ANALYSES OF 131I THYROID ACTIVITY IN PERSONS WITH SURFACE CONTAMINATION IN DIRECT MEASUREMENT WITH A STANDING-TYPE WHOLE-BODY COUNTER AS AN EMERGENCY RESPONSE IN A RADIOLOGICAL INCIDENT.

Radiat Prot Dosimetry 2021 Jul;194(2-3):65-75

Department of Radiation Measurement and Dose Assessment, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.

The authors' previous study suggested that a simple standing-type whole-body counter called FASTSCAN (Canberra, Meriden, CT, USA), widely installed throughout Japan after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in March 2011, could be used for thyroid measurements in internal dose assessment after a future radiological incident accompanied by the release of 131I into the environment. The present study performed Monte-Carlo simulations using a computational human phantom with several patterns of body surface contamination and used the results to formulate a method for probabilistic analyses of 131I thyroid activity in persons with surface contamination. The major advantage of this method is that the upper limit of the thyroid activity can be determined from the relative frequency distribution without identifying where body surface contamination remains. Read More

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Transport and dispersion of tritium from the radioactive water of the Fukushima Daiichi nuclear plant.

Mar Pollut Bull 2021 Aug 21;169:112515. Epub 2021 May 21.

First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China; Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China; Shandong Key Laboratory of Marine Science and Numerical Modeling, Qingdao 266061, China. Electronic address:

Japan recently announced plans to discharge over 1.2 million tons of radioactive water from the Fukushima Daiichi Nuclear Power Plant (FDNPP) into the Pacific Ocean. The contaminated water can poses a threat to marine ecosystems and human health. Read More

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Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident.

Sci Rep 2021 May 14;11(1):10335. Epub 2021 May 14.

Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.

The Fukushima-Daiichi Nuclear Power Plant (FNPP) accident in March of 2011 released substantial amounts of radionuclides into the environment. We collected 4,957 deciduous teeth formed in children before the Fukushima accident to obtain precise control data for teeth formed after the accident. Radioactivity was measured using imaging plates (IP) and epidemiologically assessed using multivariate regression analysis. Read More

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Quantitative modeling of radioactive cesium concentrations in large omnivorous mammals after the Fukushima nuclear power plant accident.

Authors:
Igor Shuryak

Sci Rep 2021 May 11;11(1):10049. Epub 2021 May 11.

Center for Radiological Research, Columbia University Irving Medical Center, 630 West 168th Street, VC-11-234/5, New York, NY, 10032, USA.

Large quantities of radionuclides released by the Fukushima nuclear power plant accident entered terrestrial and marine ecosystems. The resulting radioactive contamination of large omnivorous wild mammals such as wild boar (Sus scrofa) and Asian black bear (Ursus thibetanus) varied greatly depending on location, season, and time after the accident. Quantitative modeling of how such factors influence radionuclide burdens in these species is important for enhancing current knowledge of chronic radionuclide exposure consequences in mammalian populations, and for assessing potential human risks from consumption of contaminated animal meat. Read More

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New highly radioactive particles derived from Fukushima Daiichi Reactor Unit 1: Properties and environmental impacts.

Sci Total Environ 2021 Jun 5;773:145639. Epub 2021 Feb 5.

Department of Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. Electronic address:

A contaminated zone elongated toward Futaba Town, north-northwest of the Fukushima Daiichi Nuclear Power Plant (FDNPP), contains highly radioactive particles released from reactor Unit 1. There are uncertainties associated with the physio-chemical properties and environmental impacts of these particles. In this study, 31 radioactive particles were isolated from surface soils collected 3. Read More

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Effects of nitrogen on caesium allocation in rice plants (Oryza sativa).

Plant Biol (Stuttg) 2021 Sep 9;23(5):874-877. Epub 2021 Jun 9.

Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan.

After the nuclear accident in Fukushima Prefecture, Japan, in 2011, Caesium (Cs) contaminated nearby agricultural regions. Studies in these rice fields found that low K and high N fertilizer application enhanced Cs uptake in rice shoots. However, the influence of root and soil physics on these findings, as well as precise nutrient levels, remain to be clarified. Read More

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September 2021

ANALYSES OF H*(10) DOSE RATES MEASURED IN ENVIRONMENT CONTAMINATED BY RADIOACTIVE CAESIUM: CORRECTION OF DIRECTIONAL DEPENDENCE OF SCINTILLATION DETECTORS.

Radiat Prot Dosimetry 2021 May;193(3-4):228-236

Sector of Nuclear Safety Research and Emergency Preparedness, Japan Atomic Energy Agency, 148-4 Kashiwanoha Campus,178-4 Wakashiba, Kashiwa-city, Chiba, 277-0871, Japan.

Ambient dose equivalent rates were measured in the environment of the Fukushima prefecture using NaI(Tl)/CsI(Tl) scintillation detectors and CdZnTe/Ge semiconductor detectors. The dose rates obtained at the same locations varied beyond uncertainty (1σ). By replacing the spectrum-dose conversion operators obtained from the anterior-posterior geometry with those from the rotational geometry, the dose rates agreed with each other within uncertainties, except for a CsI(Tl) scintillation detector with a considerably flat crystal configuration, due to its excessive directional dependence. Read More

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Sorption-desorption coefficients of uranium in contaminated soils collected around Fukushima Daiichi Nuclear Power Station.

J Environ Radioact 2021 Jul 15;233:106617. Epub 2021 Apr 15.

Environmental Radionuclides Research Group, National Institutes for Quantum and Radiological Science and Technology (QST), 4-9-1Anagawa, Chiba, 263-8555, Japan.

Various radionuclides including fission products and heavy nuclides were released into the environment during the Fukushima Daiichi Nuclear Power Station (FDNPS) accident. The dissolution followed by migration of deposited radionuclides of Cs, Sr and U on soils could take place to the local environment. Therefore, it is necessary to determine sorption-desorption coefficients of U in soil-water system around the FDNPS from a migration viewpoint. Read More

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Dose Estimation of Landfill Disposal of Removed Soil Generated Outside Fukushima Prefecture.

Health Phys 2021 May;120(5):517-524

Nuclear Safety Research Center, Japan Atomic Energy Agency 2-4 Shirakara, Tokai-mura, Naka-gun, Ibaraki, Japan 319-1195.

Abstract: Dose estimation was conducted by assuming landfill disposal of removed soil generated outside the Fukushima Prefecture by each local town and in a lump sum. Because the radioactivity of removed soil is lower than that of specified waste that was generated at Fukushima Prefecture and the radioactivity concentration is 100,000 Bq kg-1 or less, simple landfill covered with 30 cm of non-contaminated soil was used. The exposure doses of loading/unloading, transportation, and landfill workers and the public residing near the repository site were estimated. Read More

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Measurement of uranium isotope ratios in Fukushima-accident contaminated soil samples using multi collector inductively coupled plasma mass spectrometry.

J Environ Radioact 2021 Jun 16;232:106568. Epub 2021 Mar 16.

National Institutes for Quantum and Radiological Sciences and Technology (QST), 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan.

In the present study, Cs and U activity concentrations, U/U activity ratio, and U/U isotope ratio were measured in fifteen soil samples collected from the exclusion zone around the Fukushima Daiichi Nuclear Power Station (FDNPS). The Cs activity concentrations of Fukushima-accident contaminated soil samples ranged from 29.9 to 4780 kBq kg with a mean of 2007 kBq kg. Read More

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Appraisal of probabilistic human health risks of heavy metals in vegetables from industrial, non-industrial and arsenic contaminated areas of Bangladesh.

Heliyon 2021 Feb 24;7(2):e06309. Epub 2021 Feb 24.

Hydrobiogeochemistry and Pollution Control Laboratory, Department of Environmental Sciences, Jahangirnagar University, Dhaka, 1342, Bangladesh.

Monitoring of heavy metal content in commonly consumed vegetables is of high priority for food safety, and public health risk assessment. Vegetables were collected from industrial, non-industrial, arsenic contaminated region and one of popular vegetable markets of Bangladesh for analyzing heavy metals (As, Cd, Pb, Cu and Zn) using Atomic Absorption Spectroscopy (AAS) with standard digestion procedure. Results showed significant variations of heavy metal content among vegetables and most of cases the metals (except Cu and some of Zn) revealed several times higher concentrations than that of maximum permissible level (MPL) values, which indicated the vegetables were contaminated through either natural or anthropogenic activities. Read More

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February 2021

Application of gamma radiation for disinfection of fungi in a large volume of historical archives damaged by flood following Typhoon Hagibis 2019, Japan: A case report.

Biocontrol Sci 2021 ;26(1):55-59

Department of Quantum and Radiation Technology, Graduate School of Engineering, Osaka Prefecture University.

A large volume of historical archives was extensively damaged by flood water, following Typhoon Hagibis in Fukushima, Japan, in October 2019. They were rescued from the stricken area within a week, however, the prolonged exposure of paper documents to water caused severe biodegradation by fungal growth. To disinfect fungi, the paper documents were exposed to gamma radiations emitted by a source of Cobalt 60 by the industrial irradiation service. Read More

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January 2021

Determination of Characteristic vs Anomalous Cs/Cs Isotopic Ratios in Radioactively Contaminated Environmental Samples.

Environ Sci Technol 2021 04 12;55(8):4984-4991. Epub 2021 Mar 12.

Leibniz Universität Hannover, Institute of Radioecology and Radiation Protection, 30419 Hannover, Germany.

A contamination with the ubiquitous radioactive fission product Cs cannot be assigned to its source. We used environmental samples with varying contamination levels from various parts of the world to establish their characteristic Cs/Cs isotope ratios and thereby allow their distinction. The samples included biological materials from Chernobyl and Fukushima, historic ashed human lung tissue from the 1960s from Austria, and trinitite from the Trinity Test Site, USA. Read More

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First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture.

Sci Rep 2021 Mar 11;11(1):5664. Epub 2021 Mar 11.

Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.

A part of the radiocaesium from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was emitted as glassy, water-resistant caesium-bearing microparticles (CsMPs). Here, we isolated and investigated seven CsMPs from marine particulate matter and sediment. From the elemental composition, the Cs/Cs activity ratio, and the Cs activity per unit volume results, we inferred that the five CsMPs collected from particulate matter were emitted from Unit 2 of the FDNPP, whereas the two CsMPs collected from marine sediment were possibly emitted from Unit 3, as suggested by (i) the presence of calcium and absence of zinc and (ii) the direction of the atmospheric plume during the radionuclide emission event from Unit 3. Read More

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Influence of non-equilibrium sorption on the vertical migration of Cs in forest mineral soils of Fukushima Prefecture.

J Environ Radioact 2021 Jun 6;232:106567. Epub 2021 Mar 6.

Institute of Radiological Protection and Nuclear Safety (IRSN), PSE-ENV, SRTE, LR2T, CE Cadarache, 13115, Saint Paul les Durance Cedex, France. Electronic address:

Sorption hypotheses and models are required for the prediction of Cs migration in soils contaminated after nuclear reactor accidents and nuclear weapons tests. In assessment models, the K (distribution coefficient) hypothesis for sorption, which assumes that sorption is instantaneous, linear and reversible, has often been coupled with the convection-diffusion equation (CDE) to model Cs migration. However, it fails to describe Cs migration velocities which often decrease with time. Read More

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Cesium-Catalyzed Hydrogen Production by the Gasification of Woody Biomass for Forest Decontamination.

ACS Omega 2021 Mar 16;6(8):5233-5243. Epub 2021 Feb 16.

Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima, Fukushima 960-1296, Japan.

The large quantities of contaminated wood produced following the radioactive cesium decontamination of forests after the Fukushima Daiichi Nuclear Power Plant accident in 2011 can be used as a biomass resource for energy production via thermal treatment (e.g., gasification). Read More

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