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https://www.readbyqxmd.com/read/28198440/caesium-rich-micro-particles-a-window-into-the-meltdown-events-at-the-fukushima-daiichi-nuclear-power-plant
#1
Genki Furuki, Junpei Imoto, Asumi Ochiai, Shinya Yamasaki, Kenji Nanba, Toshihiko Ohnuki, Bernd Grambow, Rodney C Ewing, Satoshi Utsunomiya
The nuclear disaster at the Fukushima Daiichi Nuclear Power Plant (FDNPP) in March 2011 caused partial meltdowns of three reactors. During the meltdowns, a type of condensed particle, a caesium-rich micro-particle (CsMP), formed inside the reactors via unknown processes. Here we report the chemical and physical processes of CsMP formation inside the reactors during the meltdowns based on atomic-resolution electron microscopy of CsMPs discovered near the FDNPP. All of the CsMPs (with sizes of 2.0-3.4 μm) comprise SiO2 glass matrices and ~10-nm-sized Zn-Fe-oxide nanoparticles associated with a wide range of Cs concentrations (1...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28193362/a-ftir-chemometrics-approach-to-characterize-the-gamma-radiation-effects-on-iodine-epoxy-paint-interactions-in-nuclear-power-plants
#2
Juliette Colombani, Elodie Chauvet, Sandrine Amat, Nathalie Dupuy, Didier Gigmes
The effects of radiation on polymeric materials are a topic of concern in a wide range of industries including the sterilization, and the nuclear power industry. While much work has concentrated on systems like polyolefins that are radiation sterilized, some work has been done on epoxy systems. The epoxy system studied is an epoxy/amine paint which is representative of the paint that covers the inner surfaces of the French nuclear reactor containment buildings. In case of a severe accident on a Nuclear Power Plant, fission products can be released from the nuclear fuel to the reactor containment building...
April 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28187334/regional-and-global-contributions-of-anthropogenic-iodine-129-in-monthly-deposition-samples-collected-in-north-east-japan-between-2006-and-2015
#3
Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Yoshihito Ohtsuka, Shun'ichi Hisamatsu
We measured the monthly atmospheric deposition flux of (129)I at Rokkasho, Aomori, Japan-the location of a commercial spent nuclear fuel reprocessing plant-from 2006 to 2015 to assess the impact of the plant on environmental (129)I levels. The plant is now under final safety assessment by a national authority after test operation using actual spent nuclear fuel. During cutting and chemical processing in test operations from April 2006 to October 2008, (129)I was discharged to the atmosphere and detected in our deposition samples...
February 7, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28182791/correction-evaluation-of-risk-perception-and-risk-comparison-information-regarding-dietary-radionuclides-after-the-2011-fukushima-nuclear-power-plant-accident
#4
Michio Murakami, Jun Nakatani, Taikan Oki
[This corrects the article DOI: 10.1371/journal.pone.0165594.].
2017: PloS One
https://www.readbyqxmd.com/read/28165926/tertiary-evaluation-of-the-committed-effective-dose-of-emergency-workers-that-responded-to-the-fukushima-daiichi-npp-accident
#5
Shojiro Yasui
In January 2014, Tokyo Electric Power Company (TEPCO) learned that the committed effective dose (CED) for nine emergency workers at the Fukushima Daiichi Nuclear Power Plant accident had been assessed by a method other than the standard assessment methods, established by the Ministry of Health, Labour and Welfare (MHLW) in a secondary evaluation conducted in July 2013. The MHLW requested that the TEPCO and primary contractors review all CED data for 6,245 workers who engaged in emergency work in March and April 2011 except those previously reviewed in the 2013 secondary evaluation...
February 6, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28163296/decontamination-reduces-radiation-anxiety-and-improves-subjective-well-being-after-the-fukushima-accident
#6
Michio Murakami, Shigeki Harada, Taikan Oki
Since the 2011 Fukushima accident, rebuilding society to protect against anxiety and improve feelings of well-being has grown in importance. A questionnaire was carried out among residents of Marumori Town, Igu County, Miyagi Prefecture, to evaluate the effects of radiation-related countermeasures implemented by the town to reduce residents' anxiety and improve their subjective well-being (response rate: 31%; valid responses: n = 174). Further, to propose effective countermeasures regarding town planning for the improvement in subjective well-being, we analyzed associations between residents' sense of attachment to the town and subjective well-being, and then identified primary factors behind their sense of attachment...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28161316/modeling-watershed-scale-137-cs-transport-in-a-forested-catchment-affected-by-the-fukushima-dai-ichi-nuclear-power-plant-accident
#7
Lezhang Wei, Tsuyoshi Kinouchi, Kazuya Yoshimura, Mark L Velleux
The Fukushima nuclear accident in 2011 resulted in (137)Cs contamination of large areas in northeast Japan. A watershed-scale (137)Cs transport model was developed and applied to a forested catchment in Fukushima area. This model considers (137)Cs wash-off from vegetation, movement through soils, and transport of dissolved and particulate (137)Cs adsorbed to clay, silt and sand. Comparisons between measurements and simulations demonstrated that the model well reproduced (137)Cs concentrations in the stream fed from the catchment...
February 2, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28142046/effect-of-evacuation-on-liver-function-after-the-fukushima-daiichi-nuclear-power-plant-accident-the-fukushima-health-management-survey
#8
Atsushi Takahashi, Tetsuya Ohira, Mitsuaki Hosoya, Seiji Yasumura, Masato Nagai, Hiromasa Ohira, Shigeatsu Hashimoto, Hiroaki Satoh, Akira Sakai, Akira Ohtsuru, Yukihiko Kawasaki, Hitoshi Suzuki, Gen Kobashi, Kotaro Ozasa, Shunichi Yamashita, Kenji Kamiya, Masafumi Abe
BACKGROUND: The Great East Japan Earthquake and subsequent Fukushima Daiichi Nuclear Power Plant accident caused residents to switch from their normal lives to lives focused on evacuation. We evaluated liver function before and after this disaster to elucidate the effects of evacuation on liver function. METHODS: This study was a longitudinal survey of 26,006 Japanese men and women living near the Fukushima Daiichi Nuclear Power Plant. This study was undertaken using data from annual health checkups conducted for persons aged 40-90 years between 2008 and 2010...
January 27, 2017: Journal of Epidemiology
https://www.readbyqxmd.com/read/28134299/dna-damage-induced-by-strontium-90-exposure-at-low-concentrations-in-mesenchymal-stromal-cells-the-functional-consequences
#9
S Musilli, N Nicolas, Z El Ali, P Orellana-Moreno, C Grand, K Tack, S Kerdine-Römer, J M Bertho
(90)Sr is one of the radionuclides released after nuclear accidents that can significantly impact human health in the long term. (90)Sr accumulates mostly in the bones of exposed populations. Previous research has shown that exposure induces changes in bone physiology both in humans and in mice. We hypothesize that, due to its close location with bone marrow stromal cells (BMSCs), (90)Sr could induce functional damage to stromal cells that may explain these biological effects due to chronic exposure to (90)Sr...
January 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28129382/detailed-distribution-map-of-absorbed-dose-rate-in-air-in-tokatsu-area-of-chiba-prefecture-japan-constructed-by-car-borne-survey-4-years-after-the-fukushima-daiichi-nuclear-power-plant-accident
#10
Kazumasa Inoue, Moeko Arai, Makoto Fujisawa, Kyouko Saito, Masahiro Fukushi
A car-borne survey was carried out in the northwestern, or Tokatsu, area of Chiba Prefecture, Japan, to make a detailed distribution map of absorbed dose rate in air four years after the Fukushima Daiichi Nuclear Power Plant accident. This area was chosen because it was the most heavily radionuclide contaminated part of Chiba Prefecture and it neighbors metropolitan Tokyo. Measurements were performed using a 3-in × 3-in NaI(Tl) scintillation spectrometer in June 2015. The survey route covered the whole Tokatsu area which includes six cities...
2017: PloS One
https://www.readbyqxmd.com/read/28125745/radiocesium-transfer-in-forest-insect-communities-after-the-fukushima-dai-ichi-nuclear-power-plant-accident
#11
Yumiko Ishii, Seiji Hayashi, Noriko Takamura
To understand radiocesium transfer in the forest insect food web, we investigated the activity concentrations of radiocesium in forest insects in the Fukushima and Ibaraki Prefectures approximately 1.5-2.5 years after the Fukushima Dai-ichi Nuclear Power Plant. We analyzed 34 species of insects sampled from 4 orders and 4 feeding functional groups (herbivore, carnivore, omnivore, and detritivore) from three sites in each prefecture. 137Cs activity concentrations were lowest in herbivorous species and were especially high in detritivorous and omnivorous species that feed on forest litter and fungi...
2017: PloS One
https://www.readbyqxmd.com/read/28119209/on-the-divergences-in-assessment-of-environmental-impacts-from-ionising-radiation-following-the-fukushima-accident
#12
REVIEW
P Strand, S Sundell-Bergman, J E Brown, M Dowdall
The accident at the Fukushima-Daiichi Nuclear Power Station on March 11, 2011, led to significant contamination of the surrounding terrestrial and marine environments. Whilst impacts on human health remain the primary concern in the aftermath of such an accident, recent years have seen a significant body of work conducted on the assessment of the accident's impacts on both the terrestrial and marine environment. Such assessments have been undertaken at various levels of biological organisation, for different species, using different methodologies and coming, in many cases, to divergent conclusions as to the effects of the accident on the environment...
January 21, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28110828/underground-measurements-of-artificial-radioactivity-in-squids-from-the-western-pacific-ocean
#13
Zhi Zeng, Yu-Hao Mi, Jian-Hua He, Hao Ma, Jian-Ping Cheng
To investigate the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident's radiological effect on marine ecosystem, ash samples of squids from the western Pacific Ocean were collected in May 2014 and measured using an underground gamma-ray spectrometer in the underground laboratory JinPing. Low levels of (108m)Ag, (110m)Ag, (134)Cs and (137)Cs were detected, which indicates that the influence of the FDNPP accident on marine ecosystem is lasting but decreasing.
January 16, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28110524/plutonium-isotopes-239-241-pu-dissolved-in-pacific-ocean-waters-detected-by-accelerator-mass-spectrometry-no-effects-of-the-fukushima-accident-observed
#14
Karin Hain, Thomas Faestermann, Leticia Fimiani, Robin Golser, José Manuel Gómez-Guzmán, Gunther Korschinek, Florian Kortmann, Christoph Lierse von Gostomski, Peter Ludwig, Peter Steier, Hirofumi Tazoe, Masatoshi Yamada
The concentration of plutonium (Pu) and the isotopic ratios of (240)Pu to (239)Pu and (241)Pu to (239)Pu were determined by accelerator mass spectrometry (AMS) in Pacific Ocean water samples (20 L each) collected in late 2012. The isotopic Pu ratios are important indicators of different contamination sources and were used to identify a possible release of Pu into the ocean by the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. In particular, (241)Pu is a well-suited indicator for a recent entry of Pu because (241)Pu from fallout of nuclear weapon testings has already significantly decayed...
February 8, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28108022/evaluation-of-a-method-for-removing-cesium-and-reducing-the-volume-of-leaf-litter-from-broad-leaved-trees-contaminated-by-the-fukushima-daiichi-nuclear-accident-during-the-great-east-japan-earthquake
#15
Shigeki Harada, Mitsunori Yanagisawa
The town of Marumori in southern Miyagi Prefecture borders on Fukushima Prefecture, and following the accident at the Fukushima Daiichi nuclear power plant, there were concerns about cesium deposition in forested areas. One of the authors of this paper has continually surveyed leaf litter from the forested areas. As leaf litter may be a source of cesium contamination from the forest to downstream areas, we considered a simplified version of wet oxidation, a method previously presented by one of the authors of this study, as a technology to reduce leaf litter weight and cesium concentration, separating radioactive nuclides from non-radioactive ones, in leaf litter...
April 2017: Chemosphere
https://www.readbyqxmd.com/read/28103695/involvement-through-photography
#16
J Takai
As a photographer living in Tokyo, I have been visiting Suetsugi village regularly to take photographs and show the printed photographs to the residents. What is the role of photography? What does it mean to be involved in the life of Suetsugi through photography? This article discusses some of the answers to these questions 5 years after the accident at Fukushima Daiichi nuclear power plant.
January 1, 2017: Annals of the ICRP
https://www.readbyqxmd.com/read/28101485/minimizing-the-health-effects-of-the-nuclear-accident-in-fukushima-on-thyroids
#17
REVIEW
Shigenobu Nagataki
RESULTS OF THE SCREENING OF THYROIDS: Because of the March 2011 nuclear accident in Fukushima, Japan, the Fukushima Prefecture initiated a thyroid ultrasound examination program. The first cycle of examinations on all children (more than 300,000) of the Fukushima Prefecture identified 116 patients as having malignant or suspected malignant thyroid nodules, and in the second cycle 59 new cases were identified. According to the available data, the thyroid cancers found by the screening are unlikely to be due to radiation, but the possibility cannot be excluded...
December 2016: European Thyroid Journal
https://www.readbyqxmd.com/read/28099476/whole-body-counter-evaluation-of-internal-radioactive-cesium-in-dogs-and-cats-exposed-to-the-fukushima-nuclear-disaster
#18
Seiichi Wada, Nobuhiko Ito, Masamichi Watanabe, Takehiko Kakizaki, Masahiro Natsuhori, Jun Kawamata, Yoshio Urayama
As a result of the 2011 nuclear incident that occurred at the Fukushima Nuclear Power Plant, a large number of abandoned dogs and cats were left within the disaster zone. A small number of these animals were rescued and cared for at shelters. Prior to the dispersal of these animals to their owners or fosterers, we evaluated the degree of internal radiocesium contamination using a specially designed whole-body counter. We conducted 863 non-invasive measurements of gamma rays due to internal radioactive cesium for 68 dogs and 120 cats at one shelter...
2017: PloS One
https://www.readbyqxmd.com/read/28095598/evaluating-the-cost-safety-and-proliferation-risks-of-small-floating-nuclear-reactors
#19
Michael J Ford, Ahmed Abdulla, M Granger Morgan
It is hard to see how our energy system can be decarbonized if the world abandons nuclear power, but equally hard to introduce the technology in nonnuclear energy states. This is especially true in countries with limited technical, institutional, and regulatory capabilities, where safety and proliferation concerns are acute. Given the need to achieve serious emissions mitigation by mid-century, and the multidecadal effort required to develop robust nuclear governance institutions, we must look to other models that might facilitate nuclear plant deployment while mitigating the technology's risks...
January 17, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28092218/analysis-of-the-effect-of-chronic-and-low-dose-radiation-exposure-on-spermatogenic-cells-of-male-large-japanese-field-mice-apodemus-speciosus-after-the-fukushima-daiichi-nuclear-power-plant-accident
#20
Sachio Takino, Hideaki Yamashiro, Yukou Sugano, Yohei Fujishima, Akifumi Nakata, Kosuke Kasai, Gohei Hayashi, Yusuke Urushihara, Masatoshi Suzuki, Hisashi Shinoda, Tomisato Miura, Manabu Fukumoto
In this study we analyzed the effect of chronic and low-dose-rate (LDR) radiation on spermatogenic cells of large Japanese field mice ( Apodemus speciosus ) after the Fukushima Daiichi Nuclear Power Plant (FNPP) accident. In March 2014, large Japanese field mice were collected from two sites located in, and one site adjacent to, the FNPP ex-evacuation zone: Tanashio, Murohara and Akogi, respectively. Testes from these animals were analyzed histologically. External dose rate from radiocesium (combined (134)Cs and (137)Cs) in these animals at the sampling sites exhibited 21 μGy/day in Tanashio, 304-365 μGy/day in Murohara and 407-447 μGy/day in Akogi...
January 16, 2017: Radiation Research
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