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Fukushima Daiichi

Tetsuya Ohira, Hideto Takahashi, Seiji Yasumura, Akira Ohtsuru, Sanae Midorikawa, Satoru Suzuki, Toshihiko Fukushima, Hiroki Shimura, Tetsuo Ishikawa, Akira Sakai, Shunichi Yamashita, Koichi Tanigawa, Hitoshi Ohto, Masafumi Abe, Shinichi Suzuki
The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between external radiation dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual external doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other)...
August 2016: Medicine (Baltimore)
Yukihisa Sanada, Tadashi Orita, Tatsuo Torii
Aerial radiological survey using an unmanned aerial vehicle (UAV) was applied to measurement surface contamination around the Fukushima Daiichi nuclear power station (FDNPS). An unmanned helicopter monitoring system (UHMS) was developed to survey the environmental effect of radioactive cesium scattered as a result of the FDNPS accident. The UHMS was used to monitor the area surrounding the FDNPS six times from 2012 to 2015. Quantitative changes in the radioactivity distribution trend were revealed from the results of these monitoring runs...
October 3, 2016: Applied Radiation and Isotopes
Shun Yasuda, Hyo Kyozuka, Yasuhisa Nomura, Keiya Fujimori, Aya Goto, Seiji Yasumura, Kennichi Hata, Tetsuya Ohira, Masafumi Abe
OBJECTIVE: The Great East Japan Earthquake and Fukushima Daiichi nuclear disaster occurred on the March 11, 2011.We investigated the incidence of SGA (small for gestational age) in the Fukushima Prefecture in newborns delivered by women who were pregnant at the time of the disasters and identified any risk factors for SGA. METHODS: Subjects were women who were pregnant at the time of the disasters. Questionnaires were sent to the women who lived in the Hamadori area (seaside and near to the nuclear power plant) at the time of the disasters as well as to a control group of women who lived outside the Hamadori area...
October 9, 2016: Journal of Maternal-fetal & Neonatal Medicine
Toshiaki Sasao
This paper analyzes the cost and efficiency of waste disposal associated with the Great East Japan Earthquake. The following two analyses were performed: (1) a popular parametric approach, which is an ordinary least squares (OLS) method to estimate the factors that affect the disposal costs; (2) a non-parametric approach, which is a two-stage data envelopment analysis (DEA) to analyze the efficiency of each municipality and clarify the best performance of the disaster waste management. Our results indicate that a higher recycling rate of disaster waste and a larger amount of tsunami sediments decrease the average disposal costs...
October 3, 2016: Waste Management
Masanobu Mori, Kin-Ichi Tsunoda, Shoichi Aizawa, Yoichi Saito, Yuko Koike, Takahiro Gonda, Shunji Abe, Kyuma Suzuki, Yumi Yuasa, Toshihiro Kuge, Hideki Tanaka, Hajime Arai, Shun Watanabe, Seiichi Nohara, Yoshitaka Minai, Yukiko Okada, Seiya Nagao
The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident has resulted in the contamination of the environment in Gunma Prefecture with radioisotope cesium (radio-Cs, (134)Cs and (137)Cs). Concentrations of radio-Cs >500Bqkg(-1) were found in wakasagi (Hypomesus nipponensis) in Lake Onuma at the top of Mount (Mt.) Akagi in August 2011. To explain the mechanism of this contamination, monitoring studies have been conducted around Lake Onuma by measuring radio-Cs concentrations in samples of fish, aquatic plants, plankton, lake water, lake sediments, and surrounding soil...
October 2, 2016: Science of the Total Environment
M Hayakawa
In Fukushima Prefecture, disaster-related death is a social problem for individuals who were forced to leave their hometowns as a result of the Great East Japan Earthquake and the accident at Fukushima Daiichi nuclear power plant. Disaster-related death is caused by stress, exhaustion, and worsening of pre-existing illnesses due to evacuation. The number of disaster-related deaths has reached almost 2000, and continues to rise. Prolonged uncertainty and deteriorating living conditions suggest no end to such deaths, although response measures have been taken to improve the situation...
October 4, 2016: Annals of the ICRP
Gian Marco Contessa, Carlo Grandi, Mario Scognamiglio, Elisabetta Genovese, Sandro Sandri
The accident at Tokyo Electric Power Company's (TEPCO's) Fukushima Daiichi nuclear power plant (NPP) has been one of the dominant topic in nuclear safety and it has brought new attention on the matter of accidents in NPPs due to external events related to natural causes. Climate change has risen new risks and the growing probability of extreme external events has increased exposure and vulnerability of workers in the nuclear sector. However extreme natural events are a threat not only to NPPs but to all facilities dealing with radioactive material and in an emergency scenario they can affect the effectiveness and implementation of safety devices and procedures and also prevent communications, causing delays in the readiness of response...
July 2016: Annali Dell'Istituto Superiore di Sanità
M Ohmori
The accident at Fukushima Daiichi nuclear power plant in the wake of the Great East Japan Earthquake received considerable media coverage. However, a leaning towards sensationalism and a proclivity for denouncing those in power resulted in articles that were, in several instances, scientifically inaccurate, causing anxiety among disaster victims and delaying recovery efforts. Individuals working for the local media in Fukushima had the task of reporting the disaster while being victims of the disaster at the same time...
October 3, 2016: Annals of the ICRP
Shogo Takahara, Maiko Ikegami, Minoru Yoneda, Hitoshi Kondo, Azusa Ishizaki, Masashi Iijima, Yoko Shimada, Yasuto Matsui
Ingestion of contaminated soil is one potential internal exposure pathway in areas contaminated by the Fukushima Daiichi Nuclear Power Plant accident. Doses from this pathway can be overestimated if the availability of radioactive nuclides in soils for the gastrointestinal tract is not considered. The concept of bioaccessibility has been adopted to evaluate this availability based on in vitro tests. This study evaluated the bioaccessibility of radioactive cesium from soils via the physiologically-based extraction test (PBET) and the extractability of those via an extraction test with 1 mol/L of hydrochloric acid (HCl)...
September 30, 2016: Risk Analysis: An Official Publication of the Society for Risk Analysis
Keiichi Akahane
After the Fukushima Daiichi nuclear power plant accident, the internal and external exposures of the residents have been very important issues and concerns. Fukushima prefectural government and Fukushima medical university have been performing the Fukushima Health Management Survey, and the external exposures of the residents have been estimated in the survey by using NIRS external dose estimation system. The doses of 66.3% residents were >1 mSv, and 94.8 % were >2 mSv. For estimating internal exposures of the residents, thyroid measurements, whole body counter measurements and simulation have been applied...
September 2016: Radiation Protection Dosimetry
J Patrick Laceby, Sylvain Huon, Yuichi Onda, Veronique Vaury, Olivier Evrard
The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident resulted in radiocesium fallout contaminating coastal catchments of the Fukushima Prefecture. As the decontamination effort progresses, the potential downstream migration of radiocesium contaminated particulate matter from forests, which cover over 65% of the most contaminated region, requires investigation. Carbon and nitrogen elemental concentrations and stable isotope ratios are thus used to model the relative contributions of forest, cultivated and subsoil sources to deposited particulate matter in three contaminated coastal catchments...
December 1, 2016: Journal of Environmental Management
Kenneth E Nollet, Tomoko Komazawa, Hitoshi Ohto
The Great East Japan Earthquake of March 11, 2011 provoked tsunami waves with inland penetration up to 5 km and run-up heights to 40 m. More than 400 km(2) were flooded, mainly along the northeast coast of Japan's largest island, Honshu. Nearly 20,000 human lives were abruptly taken by this natural disaster. Four coastal nuclear facilities went into automatic shutdown; at one, Fukushima Daiichi, cooling system failures resulted in the meltdown of three reactor cores, accompanied by explosive release of radioisotopes...
October 2016: Transfusion and Apheresis Science
M Otsuki
Before the accident at Fukushima Daiichi nuclear power plant in March 2011, I never thought about radiation. After the accident, I originally evacuated with my two sons, but we returned home a few weeks later to be with my husband and parents-in-law as I felt that life with my family was what mattered and the very basis of my happiness. Today, 5 years after the accident, some people are able to think positively about the situation, and some remain uncertain. This article offers my experience and thoughts as a mother to help enable others to feel less stressed about eating food produced in Fukushima, and suggests ideas to help lift their spirits...
September 16, 2016: Annals of the ICRP
Koji Yoshida, Tetsuko Shinkawa, Hideko Urata, Kanami Nakashima, Makiko Orita, Kiyotaka Yasui, Atsushi Kumagai, Akira Ohtsuru, Hirooki Yabe, Masaharu Maeda, Naomi Hayashida, Takashi Kudo, Shunichi Yamashita, Noboru Takamura
BACKGROUND: To shed light on the mental health of evacuees after the accident at Fukushima Daiichi Nuclear Power Station (FDNPS), we evaluate the results of the Fukushima Health Management Survey (FHMS) of the residents at Kawauchi village in Fukushima, which is located less than 30 km from the FDNPS. METHODS: We conducted the cross-sectional study within the framework of the FHMS. Exposure values were "anorexia," "subjective feelings about health," "feelings about sleep satisfaction," and "bereavement caused by the disaster," confounding variables were "age" and "sex," and outcome variables were "K6 points...
2016: PeerJ
S Katsumi
On 19 April 2011, the Ministry of Education, Culture, Sports, Science, and Technology designated 13 elementary schools, including Tominari Elementary School in Date city, as high-dose schools that needed to restrict outdoor activities due to the effects of the accident at Fukushima Daiichi nuclear power plant. Approximately 1 week later, the municipal government took action to remove the topsoil from the school grounds, and the prohibition of outdoor activities at Tominari Elementary School was lifted. The school staff continued to work on decontaminating the surrounding areas using high-pressure washers and brushes...
September 14, 2016: Annals of the ICRP
R Hayano
The accident at Fukushima Daiichi nuclear power plant contaminated the soil of densely populated regions in Fukushima Prefecture with radiocaesium, which poses risks of internal and external exposure to the residents. However, extensive whole-body-count surveys have shown that internal exposure levels of residents are negligible. In addition, data from personal dosimeters have shown that external exposure levels have decreased, so the estimated annual external dose of the majority of people is <1 mSv in most areas of Fukushima...
September 14, 2016: Annals of the ICRP
M Tsubokura
Various reports have shown that internal and external exposure levels of local residents after the accident at Fukushima Daiichi nuclear power plant were very low. However, there are serious postdisaster health effects in the form of increased prevalence of diabetes and other chronic conditions. Stress, changes in the social environment and in living arrangements, and disruption in healthcare support provided by a network of people have resulted in increasing the cost of care and changing patients' behaviour, such as delay in visiting a hospital...
September 14, 2016: Annals of the ICRP
Hiroaki Satoh, Tetsuya Ohira, Masato Nagai, Mitsuaki Hosoya, Akira Sakai, Tsuyoshi Watanabe, Akira Ohtsuru, Yukihiko Kawasaki, Hitoshi Suzuki, Atsushi Takahashi, Gen Kobashi, Kotaro Ozasa, Seiji Yasumura, Shunichi Yamashita, Kenji Kamiya, Masafumi Abe
Objective We conducted the present study to evaluate the prevalence of chronic kidney disease (CKD) and CKD complications among evacuees and non-evacuees after the Great East Japan Earthquake and Fukushima Daiichi nuclear disaster. Methods Twenty-seven thousand and eighty-eight subjects who were living near the Fukushima Daiichi Nuclear Power Plant in Fukushima Prefecture in Japan, aged ≥40 years by the Heath Care Insures, were included in the analyses. Metabolic factors were compared between the evacuees and non-evacuees stratified by the eGFR and proteinuria grades...
2016: Internal Medicine
Shigeatsu Hashimoto, Masato Nagai, Shingo Fukuma, Tetsuya Ohira, Mitsuaki Hosoya, Seiji Yasumura, Hiroaki Satoh, Hitoshi Suzuki, Akira Sakai, Akira Ohtsuru, Yukihiko Kawasaki, Atsushi Takahashi, Kotaro Ozasa, Gen Kobashi, Kenji Kamiya, Shunichi Yamashita, Shun-Ichi Fukuhara, Hitoshi Ohto, Masafumi Abe
AIM: After the Great East Japan Earthquake, over 160,000 residents near the Fukushima Daiichi Nuclear Power Plant were forced to evacuate due to a nuclear accident. Health problems in these evacuees have since become major issues. We examined the association between evacuation and incidence of metabolic syndrome (METS) among residents in Fukushima. METHODS: We conducted a cohort study among residents aged 40-74 years without METS at the time of the disaster in Fukushima...
September 13, 2016: Journal of Atherosclerosis and Thrombosis
Takaomi Arai
Radioactive emissions into the environment from the Fukushima Daiichi Nuclear Power Plant accident led to global contamination. Radionuclides such as (131)I, (134)Cs, and (137)Cs were further transported to North America and Europe. Thus, the Fukushima Daiichi Nuclear Power Plant accident is a global concern for both human health and the ecosystem because a number of countries ban or impose restrictions the import of Japanese products. In the present study, three-year (May 2011 to May 2014) fluctuations and accumulations of Cs, (134)Cs, and (137)Cs in two salmonid fish, white-spotted char and masu salmon were examined in Northeast Japan...
September 12, 2016: Ecotoxicology
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