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https://www.readbyqxmd.com/read/28914809/perception-of-radiation-risk-as-a-predictor-of-mid-term-mental-health-after-a-nuclear-disaster-the-fukushima-health-management-survey
#1
Itaru Miura, Masato Nagai, Masaharu Maeda, Mayumi Harigane, Senta Fujii, Misari Oe, Hirooki Yabe, Yuriko Suzuki, Hideto Takahashi, Tetsuya Ohira, Seiji Yasumura, Masafumi Abe
Predictive factors including risk perception for mid-term mental health after a nuclear disaster remain unknown. The purpose of this study was to examine the association between perceived radiation risk and other factors at baseline and mid-term mental health after the Fukushima Daiichi nuclear disaster of 2011 in Japan. A mail-based questionnaire survey was conducted in January 2012 and January 2013. Mental health status was assessed using the K6 scale. Psychological distress over the 2-year period was categorized into the following four groups: chronic, recovered, resistant, or worsened...
September 15, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28904389/high-wettability-of-liquid-caesium-iodine-with-solid-uranium-dioxide
#2
Ken Kurosaki, Masanori Suzuki, Masayoshi Uno, Hiroto Ishii, Masaya Kumagai, Keito Anada, Yukihiro Murakami, Yuji Ohishi, Hiroaki Muta, Toshihiro Tanaka, Shinsuke Yamanaka
In March 2011, the Fukushima Daiichi Nuclear Power Plant accident caused nuclear fuel to melt and the release of high-volatility fission products into the environment. Caesium and iodine caused environmental contamination and public exposure. Certain fission-product behaviours remain unclear. We found experimentally that liquid CsI disperses extremely favourably toward solid UO2, exhibiting a contact angle approaching zero. We further observed the presence of CsI several tens of micrometres below the surface of the solid UO2 sample, which would be caused by the infiltration of pores network by liquid CsI...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28881474/assessment-of-instructions-on-protection-against-food-contaminated-with-radiocesium-in-japan-in-2011
#3
Mayumi Seto, Koichiro Uriu, Isao Kawaguchi, Hiroyuki Yokomizo
The Japan Ministry of Health, Labour and Welfare (MHLW) has published instructions for radiological protection against food after the Fukushima Daiichi nuclear power plant accident in 2011. Following the instructions, the export and consumption of food items identified as being contaminated were restricted for a certain period. We assessed the validity of the imposed restriction periods for two representative vegetables (spinach and cabbage) grown in Fukushima Prefecture from two perspectives: effectiveness for reducing dietary dose and economic efficiency...
September 7, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28851550/comparison-of-radiocesium-concentration-changes-in-leguminous-and-non-leguminous-herbaceous-plants-observed-after-the-fukushima-dai-ichi-nuclear-power-plant-accident
#4
Shigeo Uchida, Keiko Tagami
Transfer of radiocesium from soil to crops is an important pathway for human intake. In the period from one to two years after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, food monitoring results showed that radiocesium concentrations in soybean (a legume) were higher than those in other annual agricultural crops; in these crops, root uptake is the major pathway of radiocesium from soil to plant. However, it was not clear whether or not leguminous and non-leguminous herbaceous plants have different Cs uptake abilities from the same soil because crop sample collection fields were different...
August 26, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28846975/stabilization-of-cesium-in-alkali-activated-municipal-solid-waste-incineration-fly-ash-and-a-pyrophyllite-based-system
#5
Kenji Shiota, Takafumi Nakamura, Masaki Takaoka, Siti Fatimah Aminuddin, Kazuyuki Oshita, Takashi Fujimori
Environmentally sound treatments are required to dispose of municipal solid waste incineration fly ash (MSWIFA) contaminated with radioactive cesium (Cs) from the Fukushima Daiichi nuclear power plant accident in Japan. This study focuses on the stabilization of Cs using an alkali-activated MSWIFA and pyophyllite-based system. Three composite solid products were synthesized after mixtures of raw materials (dehydrated pyrophyllite, MSWIFA, 14 mol/L aqueous sodium hydroxide, and sodium silicate solution) were cured at 105 °C for 24 h...
August 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/28822869/a-review-of-terrorism-and-its-reduction-of-the-gender-ratio-at-birth-after-seasonal-adjustment
#6
Victor Grech, Dorota Zammit
BACKGROUND: Males are born in excess of females, a ratio expressed as M/T (males:total births). The ratio exhibits seasonal variation. Furthermore, acute stressful events may result in a transient dip in male births due to excess foetal losses, reducing M/T. AIMS: This study was carried out in order to identify significant M/T dips after adjusting for seasonality. STUDY DESIGN: Live births by gender and month were sought for acute stressful events...
August 17, 2017: Early Human Development
https://www.readbyqxmd.com/read/28821768/real-time-monitoring-of-water-level-and-temperature-in-storage-fuel-pools-through-optical-fibre-sensors
#7
S Rizzolo, J Périsse, A Boukenter, Y Ouerdane, E Marin, J-R Macé, M Cannas, S Girard
We present an innovative architecture of a Rayleigh-based optical fibre sensor for the monitoring of water level and temperature inside storage nuclear fuel pools. This sensor, able to withstand the harsh constraints encountered under accidental conditions such as those pointed-out during the Fukushima-Daiichi event (temperature up to 100 °C and radiation dose level up to ~20 kGy), exploits the Optical Frequency Domain Reflectometry technique to remotely monitor a radiation resistant silica-based optical fibre i...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817098/estimation-of-the-vertical-distribution-of-radiocesium-in-soil-on-the-basis-of-the-characteristics-of-gamma-ray-spectra-obtained-via-aerial-radiation-monitoring-using-an-unmanned-helicopter
#8
Kotaro Ochi, Miyuki Sasaki, Mutsushi Ishida, Shoichiro Hamamoto, Taku Nishimura, Yukihisa Sanada
After the Fukushima Daiichi Nuclear Power Plant accident, the vertical distribution of radiocesium in soil has been investigated to better understand the behavior of radiocesium in the environment. The typical method used for measuring the vertical distribution of radiocesium is troublesome because it requires collection and measurement of the activity of soil samples. In this study, we established a method of estimating the vertical distribution of radiocesium by focusing on the characteristics of gamma-ray spectra obtained via aerial radiation monitoring using an unmanned helicopter...
August 17, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28811510/temporal-changes-in-the-radiocesium-distribution-in-forests-over-the-five-years-after-the-fukushima-daiichi-nuclear-power-plant-accident
#9
Naohiro Imamura, Masabumi Komatsu, Shinta Ohashi, Shoji Hashimoto, Takuya Kajimoto, Shinji Kaneko, Tsutomu Takano
To elucidate the temporal changes in the radiocesium distribution in forests contaminated by the Fukushima Daiichi Nuclear Power Plant accident, we monitored the (137)Cs concentration and inventory within forests from 2011 to 2015 across nine plots containing variable tree species and different contamination levels. The (137)Cs concentrations in needles and branches decreased exponentially at all coniferous plots, with effective ecological half-lives of 0.45-1.55 yr for needles and 0.83-1.69 yr for branches...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807451/the-137-cs-activity-concentration-of-suspended-and-dissolved-fractions-in-irrigation-waters-collected-from-the-80%C3%A2-km-zone-around-tepco-s-fukushima-daiichi-nuclear-power-station
#10
Hirofumi Tsukada, Satoshi Nihira, Takashi Watanabe, Satoru Takeda
Fifty-four samples of irrigation water were collected in 2014 from agricultural ponds, rivers, and dams within the 80 km zone around TEPCO's Fukushima Daiichi Nuclear Power Station (FDNPS). The samples were filtered with a 0.45 μm pore-size membrane filter to produce suspended and dissolved fractions. The (137)Cs activity concentration of the suspended fraction varied from 1.5 to 300 Bq g(-1) dry weight and was significantly higher than that in the soil around each sampling site. The range of (137)Cs activity concentrations in the dissolved fraction varied over three orders of magnitude at 0...
August 11, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28802269/removal-of-soluble-strontium-into-biogenic-carbonate-minerals-from-a-highly-saline-solution-using-halophilic-bacterium-bacillus-sp-tk2d
#11
Takumi Horiike, Yuma Dotsuta, Yuriko Nakano, Asumi Ochiai, Satoshi Utsunomiya, Toshihiko Ohnuki, Mitsuo Yamashita
Radioactive strontium ((90)Sr) leaked into saline environments, including the ocean, from the Fukushima Daiichi Nuclear Power Plant after a nuclear accident. Since the removal of (90)Sr using general adsorbents (e.g., zeolite) is not efficient at high salinity, a suitable alternative immobilization method is necessary. Therefore, we incorporated soluble Sr into biogenic carbonate minerals generated by urease-producing microorganisms from a saline solution. An isolate, Bacillus sp. strain TK2d, from marine sediment removed > 99% Sr after contact for four days in a saline solution (1...
August 11, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28776900/pathological-findings-of-japanese-black-cattle-living-in-the-restricted-area-of-the-fukushima-daiichi-nuclear-power-plant-accident-2013-2016
#12
Jun Sasaki, Kayoko Hiratani, Itaru Sato, Hiroshi Satoh, Yoshitaka Deguchi, Hiroyuki Chida, Masahiro Natsuhori, Takahisa Murata, Kenji Ochiai, Kumiko Otani, Keiji Okada, Nobuhiko Ito
Fifty-one Japanese black cattle from four farms in the evacuation zone of the Fukushima nuclear accident were examined pathologically during the period, 2013-2016. We found no evidence of a radiation effect on pathological findings in any of these autopsy cases, although nine cases (3.7%) of enzootic bovine leukosis (EBL) and three cases (1.2%) of goiter were diagnosed. Estimated integrating dose of external exposure in EBL cases ranged from a maximum of 1200 mSv to a minimum of 72 mSv. Clinically, five cases showed wobble, dysstasia or paralysis...
August 4, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28751728/radiocesium-concentrations-in-wild-mushrooms-after-the-accident-at-the-fukushima-daiichi-nuclear-power-station-follow-up-study-in-kawauchi-village
#13
Makiko Orita, Kanami Nakashima, Yasuyuki Taira, Toshiki Fukuda, Yoshiko Fukushima, Takashi Kudo, Yuko Endo, Shunichi Yamashita, Noboru Takamura
Since the accident at the Chernobyl Nuclear Power Plant, it has become well known that radiocesium tends to concentrate in wild mushrooms. During the recovery process after the accident at the Fukushima Daiichi Nuclear Power Station (FDNPS), it is important to perform follow-up measurements of the activity concentrations of radiocesium in mushrooms. We evaluated the activity concentrations of the detected artificial radionuclides (radiocesium) in wild mushrooms collected from Kawauchi village, which is within 30 km of the FDNPS, in 2015, four years after the accident...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28749808/body-surface-contamination-levels-of-residents-under-different-evacuation-scenarios-after-the-fukushima-daiichi-nuclear-power-plant-accident
#14
Takashi Ohba, Arifumi Hasegawa, Yoshitaka Kohayagawa, Hisayoshi Kondo, Gen Suzuki
Body surface contamination levels should be correlated with inhaled actual thyroid doses during evacuation following the Fukushima Daiichi nuclear power plant (FDNPP) accident. Evacuees and residents were screened for body surface contamination using a Geiger-Mueller survey meter. The authors obtained 7,539 individual screening data sheets as well as gamma-spectrometry data from measurements made on clothing of two subjects by using a germanium spectrometer. Body surface contamination levels were analyzed in four residential groups during two different periods: 12-14 and 15-17 March 2011...
September 2017: Health Physics
https://www.readbyqxmd.com/read/28746995/desorption-of-radioactive-cesium-by-seawater-from-the-suspended-particles-in-river-water
#15
Masaki Onodera, Akira Kirishima, Seiya Nagao, Kouichi Takamiya, Tsutomu Ohtsuki, Daisuke Akiyama, Nobuaki Sato
In 2011, the accident at the Fukushima-Daiichi nuclear power plant dispersed radioactive cesium throughout the environment, contaminating the land, rivers, and sea. Suspended particles containing clay minerals are the transportation medium for radioactive cesium from rivers to the ocean because cesium is strongly adsorbed between the layers of clay minerals, forming inner sphere complexes. In this study, the adsorption and desorption behaviors of radioactive cesium from suspended clay particles in river water have been investigated...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28743069/the-influence-of-134-cs-on-the-137-cs-gamma-spectrometric-peak-to-valley-ratio-and-improvement-of-the-peak-to-valley-method-by-limiting-the-detector-field-of-view
#16
Karl Östlund, Christer Samuelsson, Sören Mattsson, Christopher L Rääf
The peak-to-valley method was investigated under laboratory conditions and in situ with respect to both (134)Cs perturbation of the (137)Cs valley and use of collimation. The (134)Cs perturbation is significant down to (134)Cs:(137)Cs activity ratios of 1:100. In these cases the full energy peaks from (134)Cs (796 and 802keV) and associated valley should be used instead of the peak and valley from the (137)Cs 662keV peak. Use of collimators in situ outside Fukushima Daiichi significantly increased PTV for (134)Cs...
July 15, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28710475/isotopic-signature-and-nano-texture-of-cesium-rich-micro-particles-release-of-uranium-and-fission-products-from-the-fukushima-daiichi-nuclear-power-plant
#17
Junpei Imoto, Asumi Ochiai, Genki Furuki, Mizuki Suetake, Ryohei Ikehara, Kenji Horie, Mami Takehara, Shinya Yamasaki, Kenji Nanba, Toshihiko Ohnuki, Gareth T W Law, Bernd Grambow, Rodney C Ewing, Satoshi Utsunomiya
Highly radioactive cesium-rich microparticles (CsMPs) released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) provide nano-scale chemical fingerprints of the 2011 tragedy. U, Cs, Ba, Rb, K, and Ca isotopic ratios were determined on three CsMPs (3.79-780 Bq) collected within ~10 km from the FDNPP to determine the CsMPs' origin and mechanism of formation. Apart from crystalline Fe-pollucite, CsFeSi2O6 · nH2O, CsMPs are comprised mainly of Zn-Fe-oxide nanoparticles in a SiO2 glass matrix (up to ~30 wt% of Cs and ~1 wt% of U mainly associated with Zn-Fe-oxide)...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28682791/individual-external-dose-monitoring-of-all-citizens-of-date-city-by-passive-dosimeter-5-to-51-months-after-the-fukushima-npp-accident-series-ii-prediction-of-lifetime-additional-effective-dose-and-evaluating-the-effect-of-decontamination-on-individual-dose
#18
Makoto Miyazaki, Ryugo Hayano
In the first paper of this series, we showed that the ratio c of individual dose to ambient dose did not change with time in Date City, Fukushima Prefecture, after the Fukushima Daiichi Nuclear Power Plant accident. The purpose of the present paper, the second in a series, is to estimate the lifetime doses of the Date City residents, based on continuous glass badge monitoring data, extrapolated by means of the ambient-dose-rate reduction function obtained from the airborne monitoring data. As a result, we found that the external exposure contribution to the mean additional lifetime dose of residents living in Date City is not expected to exceed 18 mSv...
July 6, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28680007/the-japan-environment-and-children-s-study-jecs-in-fukushima-prefecture-a-progress-report-on-the-enrollment-stage
#19
Koichi Hashimoto, Seiji Yasumura, Keiya Fujimori, Hyo Kyozuka, Yu Wakaki, Akiko Sato, Haruko Hanzawa, Tadahiko Yokoyama, Testushi Sato, Mitsuaki Hosoya
The Japan Environment and Children's Study is an ongoing nationwide birth cohort study that is being conducted at 15 regional centers throughout Japan. The recruitment of subjects in the study area within Fukushima Prefecture, which includes Fukushima City, Minami Soma City and Futaba County, was begun on January 31, 2011 with the cooperation of the obstetrics and gynecology departments of local medical institutions. On March 11, soon after the start of recruitment, the Tohoku region was hit by an unprecedented disaster in the shape of the Great East Japan Earthquake, which was closely followed by the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Plant accident...
August 9, 2017: Fukushima Journal of Medical Science
https://www.readbyqxmd.com/read/28675844/treatment-of-radioactive-liquid-effluents-by-reverse-osmosis-membranes-from-lab-scale-to-pilot-scale
#20
Nicolas Combernoux, Luc Schrive, Véronique Labed, Yvan Wyart, Emilie Carretier, Philippe Moulin
The recent use of the reverse osmosis (RO) process at the damaged Fukushima-Daiichi nuclear power plant generated a growing interest in the application of this process for decontamination purposes. This study focused on the development of a robust RO process for decontamination of two kinds of liquid effluents: a contaminated groundwater after a nuclear disaster and a contaminated seawater during a nuclear accident. The SW30 HR membrane was selected among other in this study due to higher retentions (96% for Cs and 98% for Sr) in a true groundwater...
June 24, 2017: Water Research
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