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Fukushima Daiichi

Ayako Yagahara, Keiri Hanai, Shin Hasegawa, Katsuhiko Ogasawara
BACKGROUND: After the Fukushima Daiichi nuclear accident on March 11, 2011, interest in, and fear of, radiation increased among citizens. When such accidents occur, appropriate risk communication must provided by the government. It is therefore necessary to understand the fears of citizens in the days after such accidents. OBJECTIVE: This study aimed to identify the progression of people's concerns, specifically fear, from a study of radiation-related tweets in the days after the Fukushima Daiichi nuclear accident...
March 15, 2018: JMIR Public Health and Surveillance
Makoto Hasegawa, Michio Murakami, Yoshitake Takebayashi, Satoshi Suzuki, Hitoshi Ohto
After the Great East Japan Earthquake and the subsequent Fukushima Daiichi Nuclear Power Station accident in 2011, there was a strong demand to promote disaster preparedness approaches and health checkups for the prevention of lifestyle diseases. This study examined the yearly change in the percentage of those who prepared for disasters and who utilized health checkups in Fukushima Prefecture, and identified the factors governing disaster preparedness and utilization of health checkups. We used the public opinion survey from 2011 to 2015 ( n = 677-779 each year) on prefectural policies that is conducted every year by the Fukushima Prefecture government Public Consultation Unit...
March 14, 2018: International Journal of Environmental Research and Public Health
Manabu Fujii, Keisuke Ono, Chihiro Yoshimura, Manami Miyamoto
Anthropogenically released radioactive cesium (RCs) poses serious ecological and environmental concerns given its persistency in the environment. Although accumulation of RCs in aqueous and sedimentary environments is often reported to associate with organic matter (OM), the mechanisms responsible remain unclear. Here, we investigated RCs in fine sediments along the Abukuma River, the largest river near the Fukushima Daiichi Nuclear Power Plant, 1.5-4 years after the accident. Measuring the density-separated sediment fractions with a broad range of OM content (%) indicated that the RCs concentration (Bq·kg-1 ) is positively correlated with OM content for intermediate-density fractions in which OM is primarily characterized by autochthonous origin...
March 2, 2018: Water Research
Naohide Shinohara, Hiroko Yoshida-Ohuchi
Outdoor decontamination efforts have been ongoing since the Fukushima Daiichi nuclear power plant (FDNPP) accident; however, little is known about indoor contamination. Therefore, house dust was sampled based on particle size in 21 wooden buildings (19 residential houses and 2 community centers) within the evacuation area close to the FDNPP, Fukushima Prefecture, Japan. Activities of radiocesium (137 Cs) per gram of house dust increased with decreasing particle size (mean: 6.1 × 103 , 2.6 × 103 , 1...
February 27, 2018: Environment International
Hideo Yamazaki, Masanobu Ishida, Ryoichi Hinokio, Yosuke Alexandre Yamashiki, Ryokei Azuma
A monitoring survey was conducted from August 2011 to July 2016 of the spatiotemporal distribution in the 400 km2 area of the northern part of Tokyo Bay and in rivers flowing into it of radiocesium released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. The average inventory in the river mouth (10 km2) was 131 kBq⋅m-2 and 0.73 kBq⋅m-2 in the central bay (330 km2) as the decay corrected value on March 16, 2011. Most of the radiocesium that flowed into Tokyo Bay originated in the northeastern section of the Tokyo metropolitan area, where the highest precipitation zone of 137Cs in soil was almost the same level as that in Fukushima City, then flowed into and was deposited in the Old-Edogawa River estuary, deep in Tokyo Bay...
2018: PloS One
Junwen Wu
After the Fukushima nuclear accident (FNA),137 Cs activities of seawater in the Western North Pacific (WNP) and China Seas were determined in order to examine whether137 Cs derived from FNA across the Kuroshio was still existed and if there were any indications of FNA's impact. High137 Cs activities at 200-500m were observed in the south of Kuroshio during 2015, indicating137 Cs from FNA could cross the Kuroshio. Surface137 Cs activities were on average 1.43±0.42Bqm-3 for WNP, 1.11±0.14Bqm-3 for South China Sea (SCS) and 1...
February 2018: Marine Pollution Bulletin
Ryota Otsubo, Zhanna Mussazhanova, Yuko Akazawa, Ayako Sato, Katsuya Matsuda, Megumi Matsumoto, Hiroshi Yano, Michiko Matsuse, Norisato Mitsutake, Takao Ando, Daisuke Niino, Takeshi Nagayasu, Masahiro Nakashima
BACKGROUND: There have been great concerns about pediatric thyroid cancers after the accident at the Fukushima Daiichi Nuclear Power Plant in 2011. CASE PRESENTATION: We report a case of a 7-year-old Japanese girl with sporadic papillary thyroid carcinoma (PTC) harboring an ETV6/NTRK3 rearrangement. The patient presented with tumors in both lobes and underwent thyroidectomy followed by radioactive iodine (RAI) ablation. Histopathology showed a classic type of PTC with cervical lymph node metastasis...
February 10, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
Guosheng Yang, Hirofumi Tazoe, Masatoshi Yamada
To reconstruct 131I deposition and identify the source of radioiodine due to the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, 129I activity and 129I/127I atom ratio should be obtained by preparing and analyzing large numbers of samples economically. In this study, great efforts were made to realize mild TMAH (tetramethyl ammonium hydroxide) extraction of environmental samples at 90 °C to obtain solutions suitable for the following triple-quadrupole inductively coupled plasma-mass spectrometry (ICP-QQQ) MS/MS mode analysis...
May 30, 2018: Analytica Chimica Acta
Asumi Ochiai, Junpei Imoto, Mizuki Suetake, Tatsuki Komiya, Genki Furuki, Ryohei Ikehara, Shinya Yamasaki, Gareth T W Law, Toshihiko Ohnuki, Bernd Grambow, Rodney C Ewing, Satoshi Utsunomiya
Trace U was released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) during the meltdowns, but the speciation of the released components of the nuclear fuel remains unknown. We report, for the first time, the atomic-scale characteristics of nano-fragments of the nuclear fuels that were released from the FDNPP into the environment. Nano-fragments of an intrinsic U-phase were discovered to be closely associated with radioactive cesium-rich microparticles (CsMPs) in paddy soils collected ~4 km from the FDNPP...
January 29, 2018: Environmental Science & Technology
Peter George Martin, Dean Connor, Oliver David Payton, Macarena Leal-Olloqui, Anya C Keatley, Thomas B Scott
The distribution, quantification and exposure-related effects of radiation in the environment, arising from both natural and anthropogenic sources, is of great (and growing) concern for global populations. Recent events at the Fukushima Daiichi Nuclear Plant (FDNPP) have further highlighted the importance of developing radiation mapping technologies that not only contribute to the continued assessment of contamination, but can also serve as an educational tool for members of the public regarding its behaviour and extent...
January 19, 2018: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
Hyoe Takata, Masashi Kusakabe, Naohiko Inatomi, Takahito Ikenoue
Monitoring of 137Cs in seawater in coastal areas around Japan between 1983 and 2016 yielded new insights into the sources and transport of Fukushima Daiichi Nuclear Power Plant (FDNPP)-derived 137Cs, particularly along the west coast of Japan. Before the FDNPP accident (1983-2010), the activity concentrations of 137Cs, mainly from fallout, were decreasing exponentially. Effective 137Cs half-lives in surface seawater ranged from 15.6 to 18.4 yr. After the FDNPP accident (March 2011) 137Cs activity concentrations in seawater off Fukushima and neighboring prefectures immediately increased...
January 16, 2018: Environmental Science & Technology
Michio Murakami, Yoshitake Takebayashi, Yoshihito Takeda, Akiko Sato, Yasumasa Igarashi, Kazumi Sano, Tetsuo Yasutaka, Wataru Naito, Sumire Hirota, Aya Goto, Tetsuya Ohira, Seiji Yasumura, Koichi Tanigawa
After the Fukushima Daiichi Nuclear Power Station accident in 2011, concerns about radiation exposure and decline in subjective well-being have been reported. To tackle these problems, various countermeasures in relation to radiation have been implemented. In this study, we comprehensively evaluated the effects of radiological countermeasures on subjective well-being (e.g., satisfaction with life (SWL) and emotional well-being) and radiation anxiety, through a questionnaire survey targeting Fukushima residents (N = 1023)...
January 12, 2018: International Journal of Environmental Research and Public Health
Misari Oe, Masaharu Maeda, Tetsuya Ohira, Shuntaro Itagaki, Mayumi Harigane, Yuriko Suzuki, Hirooki Yabe, Seiji Yasumura, Kenji Kamiya, Hitoshi Ohto
The Fukushima Daiichi Nuclear Power Plant accident, which occurred in March 2011, is having long-term effects on children. We planned this study to describe the trajectories of emotional symptoms and peer relationship problems in children and to examine potential risks and protective factors over the 35 months following the accident. The sample was 11,791 children in the first to sixth elementary grades. We identified four patterns for emotional symptoms and three patterns for peer relationship problems, using group-based trajectory modelling...
January 6, 2018: International Journal of Environmental Research and Public Health
Hyuncheol Kim, Minsun Kim, Wanno Lee, Soonhyun Kim
After the Fukushima Daiichi Nuclear Power Plant disaster in Japan in 2011, the demand drastically increased for efficient technology for the removal of radioactive cesium. Prussian blue (PB) nanoparticles have shown excellent adsorption ability toward Cs. In this study, we synthesized PB nanoparticles incorporated polyacrylonitrile nanofiber (PB/PAN). PB/PAN has the porous structure of nanofibers, with diameters of several hundred nanometers. PB nanoparticles can be incorporated successfully into the PAN matrix without any change to their intrinsic crystallinity and structure...
December 27, 2017: Journal of Hazardous Materials
Haruka Toda, Shuhei Nomura, Stuart Gilmour, Masaharu Tsubokura, Tomoyoshi Oikawa, Kiwon Lee, Grace Y Kiyabu, Kenji Shibuya
OBJECTIVE: To assess the medium-term indirect impact of the 2011 Fukushima Daiichi nuclear accident on cardiovascular disease (CVD) risks and to identify whether risk factors for CVD changed after the accident. PARTICIPANTS: Residents aged 40 years and over participating in annual public health check-ups from 2009 to 2012, administered by Minamisoma city, located about 10 to 40 km from the Fukushima Daiichi nuclear plant. METHODS: The sex-specific Framingham CVD risk score was considered as the outcome measure and was compared before (2009-2010) and after the accident (2011-2012)...
December 22, 2017: BMJ Open
Xiaobing Geng, Zhenghui Xie, Lijun Zhang, Mei Xu, Binghao Jia
An inverse source estimation method is proposed to reconstruct emission rates using local air concentration sampling data. It involves the nonlinear least squares-based ensemble four-dimensional variational data assimilation (NLS-4DVar) algorithm and a transfer coefficient matrix (TCM) created using FLEXPART, a Lagrangian atmospheric dispersion model. The method was tested by twin experiments and experiments with actual Cs-137 concentrations measured around the Fukushima Daiichi Nuclear Power Plant (FDNPP)...
December 21, 2017: Journal of Environmental Radioactivity
Kazuma Koarai, Yasushi Kino, Atsushi Takahashi, Toshihiko Suzuki, Yoshinaka Shimizu, Mirei Chiba, Ken Osaka, Keiichi Sasaki, Yusuke Urushihara, Tomokazu Fukuda, Emiko Isogai, Hideaki Yamashiro, Toshitaka Oka, Tsutomu Sekine, Manabu Fukumoto, Hisashi Shinoda
90Sr specific activity in the teeth of young cattle that were abandoned in Kawauchi village and Okuma town located in the former evacuation areas of the Fukushima-Daiichi Nuclear Power Plant (FNPP) accident were measured. Additionally, specific activity in contaminated surface soils sampled from the same area was measured. (1) All cattle teeth examined were contaminated with 90Sr. The specific activity, however, varied depending on the developmental stage of the teeth during the FNPP accident; teeth that had started development before the accident exhibited comparatively lower values, while teeth developed mainly after the accident showed higher values...
December 20, 2017: Journal of Environmental Radioactivity
Ryuji Okazaki, Kazuhiro Ohga, Makoto Yoko-O, Masaoki Kohzaki
According to questionnaire surveys in 2011 and 2013 about the health effects of radiation after the Fukushima Daiichi Nuclear Power Plant Accident, the guardians of child patients were more anxious than doctors and medical students. Also, according to the thyroid examinations in a Fukushima health survey, 190 cases of thyroid cancer were reported, and anxiety about radiation effects remained. This study is based on a survey about the guardians of child patients anxiety about radiation effects six years after the nuclear power plant accident, and includes a questionnaire survey about radiation effects and thyroid examinations in a Fukushima health survey...
2017: Journal of UOEH
Rimi Tsuchiya, Yasuyuki Taira, Makiko Orita, Yoshiko Fukushima, Yuukou Endo, Shunichi Yamashita, Noboru Takamura
Kawauchi Village, in Fukushima Prefecture, is located within a 30-km radius of the nuclear disaster site of the Fukushima Daiichi Nuclear Power Plant (FDNPP). "Sansai" (edible wild plants) in this village have been evaluated by gamma spectrometry after the residents had returned to their homes, to determine the residents' risk of internal exposure to artificial radionuclides due to consumption of these plants. The concentrations of radiocesium (cesium-134 and cesium-137) were measured in all 364 samples collected in spring 2015...
2017: PloS One
Naoko Horikoshi, Hajime Iwasa, Seiji Yasumura, Masaharu Maeda
The Fukushima Medical University conducted a mental health care program for evacuees after the Fukushima Daiichi nuclear power plant accident. However, the mental health status of non-respondents has not been considered for surveys using questionnaires. Therefore, the aim of this study was to clarify the characteristics of non-respondents and respondents. The target population of the survey (FY2011-2013) is people living in the nationally designated evacuation zone of Fukushima prefecture. Among these, the participants were 967 people (20 years or older)...
December 12, 2017: Fukushima Journal of Medical Science
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