タグ「137Cs」
Title: Distribution of oceanic 137Cs from the Fukushima Dai-ichi Nuclear Power Plant simulated numerically by a regional ocean model
Author: Daisuke Tsumune, Takaki Tsubono, Michio Aoyama, Katsumi Hirose
Reference: Journal of Environmental Radioactivity, Volume 111, September 2012, Pages 100–108
DOI: http://dx.doi.org/10.1016/j.jenvrad.2011.10.007
Keywords: Fukushima reactor accident; Regional ocean model; Release rate; 137Cs; 131I/137Cs activity ratio
Abstract: Radioactive materials were released to the environment from the Fukushima Dai-ichi Nuclear Power Plant as a result of the reactor accident after the Tohoku earthquake and tsunami of 11 March 2011. The measured 137Cs concentration in a seawater sample near the Fukushima Dai-ichi Nuclear Power Plant site reached 68 kBq L−1 (6.8 × 104 Bq L−1) on 6 April. The two major likely pathways from the accident site to the ocean existed: direct release of high radioactive liquid wastes to the ocean and the deposition of airborne radioactivity to the ocean surface. By analysis of the 131I/137Cs activity ratio, we determined that direct release from the site contributed more to the measured 137Cs concentration than atmospheric deposition did.
URL: http://www.sciencedirect.com/science/article/pii/S0265931X11002463
Title: Radioactive cesium (134Cs and 137Cs) content in human placenta after the Fukushima nuclear power plant accident
Author: Makoto Suzuki, Hiroshi Terada, Nobuya Unno, Ichiro Yamaguchi, Naoki Kunugita, Hisanori Minakami
Reference: Journal of Obstetrics and Gynaecology Research, 2 JUL 2013
DOI: 10.1111/jog.12071
Keywords: cesium;human placenta;nuclear power plant accident
Abstract: The degree of contamination with radioactive cesium (134Cs and 137Cs) in the human placenta after the accident at Fukushima nuclear power plant (FNP), which occurred on 11 March 2011, has not been assessed. Material and Methods:134Cs and 137Cs contents were determined in 10 placentas from 10 women who gave birth to term singleton infants during the period between October 2011 and August 2012 using high-purity germanium detectors for gamma ray spectrometry. Five women resided within 50 km of FNP (neighbor group) and gave birth by the end of February 2012, while the other five women resided within 210–290 km of FNP (distant group) and gave birth in July and August 2012.
URL: http://onlinelibrary.wiley.com/doi/10.1111/jog.12071/abstract
Title: Post-Chernobyl investigations of radiocaesium activity concentrations in Adriatic Sea pilchards
Author: Zdenko Franić, Branko Petrinec1, Gina Branica, Gordana Marović, Dragan Kubelka and Zrinka Franić
Reference: Radiat Prot Dosimetry (2012) 151 (2): 314-322.
DOI: 10.1093/rpd/ncs012
Keywords: 134Cs, 137Cs, Adriatic Sea
Abstract: Investigations in the post-Chernobyl period (1986–2009) of radiocaesium activity concentrations in Adriatic pilchards are presented. Compared with pre-Chernobyl period, the Chernobyl nuclear accident caused increase of 137Cs activity concentrations in pilchards. By fitting the measured 137Cs activity concentrations to the theoretical curve was estimated to be 1.5±0.4 y for 1986–90 and 5.8±0.4 y for 1991–2009 and the bimodal behaviour for the ecological half-life of 137Cs in pilchards has been observed. Estimated annual effective doses received by 134Cs and 137Cs intake due to consumption for an adult member of Croatian population are small. Collective dose for the 1986–2009 period was 4.9+0.3 person-Sv. The observed 134Cs/137Cs activity ratio in pilchards was similar to the ratio that has been found in other environmental samples. The concentration factor for pilchards was roughly estimated to be 93.7±39.2 l kg−1, which is consistent with the values observed elsewhere.
URL: http://rpd.oxfordjournals.org/content/151/2/314.full.pdf+html
Title: Testicular steroidogenesis is not altered by 137 cesium Chernobyl fallout, following in utero or post-natal chronic exposure
Author: Grignard E, Guéguen Y, Grison S, Dublineau I, Gourmelon P, Souidi M
Reference: Comptes Rendus Biologies, Volume 333, Issue 5, May 2010, Pages 416–423
doi: http://dx.doi.org/10.1016/j.crvi.2010.02.003
Keywords: Steroidogenesis, Cesium, Chronic contamination, Chernobyl, utero exposure, postnatal chronic exposure
Abstract: The testis is especially sensitive to pollutants, including radionuclides. Following the Chernobyl nuclear power plant accident, several of these radionuclides were emitted and spread in the environment. Subsequently, children presented some disruptions of the endocrine system. To determine whether these disruptions were due to 137 cesium (137Cs) exposure, the effects of chronic contamination with low doses of 137Cs in utero or from birth on testicular steroidogenesis in rats were studied. Contamination was continued for 9 months. No modification was observed in circulating level of hormones (17β-estradiol, testosterone, follicle-stimulating hormone, luteinizing hormone) following in utero or post-natal contamination. Expression of several genes involved in testicular steroidogenesis was affected (cyp19a1, fxr, sf-1), without modification of protein expression or activity. Our results suggest that growing organisms may be affected at the molecular level by 137Cs contamination at this post-accidental dose.
URL: http://www.sciencedirect.com/science/article/pii/S1631069110000466
Title: The evaluation of several indicators of cattle in the remote period after the Chernobyl accident
Author: Zarvanskaya, Svetlana Andreyevna
Reference: Moscow, 2004
Keywords: cattle, remote period after the accident, cesium-137, forage, milk
Abstract: Objective: To investigate the influence of incorporated Cs on some indicators of cows from farms of Klintsovsky Bryansk region in the remote period after the Chernobyl accident, and evaluate the effectiveness of the sorbents to reduce the transfer of Cs from forage into milk.
URL:http://www.dissercat.com/content/otsenka-nekotorykh-pokazatelei-sostoyaniya-krupnogo-rogatogo-skota-v-otdalennyi-period-posle
Title: Radioecological situation in the forest ecosystems of the Ryazan region, contaminated as a result of the accident at the Chernobyl nuclear power plant
Author: Kononova, Galina Alexandrovna
Reference: Moscow, 2004
Keywords: Ryazan region, forest vegetation, radionuclide migration, cesium-137, ecosystem, mushrooms
Abstract: The main purpose of the work was to study the radiological situation in the forest ecosystems of the Ryazan region contaminated by radionuclides due to the accident at the Chernobyl nuclear power plant, to determine the levels of cesium in the timber and non-timber forest resources, to assess their compliance with sanitary and hygienic regulations.
URL:http://www.dissercat.com/content/radioekologicheskaya-obstanovka-v-lesnykh-ekosistemakh-ryazanskoi-oblasti-zagryaznennykh-rad
Author: Dementyev Dmitry V., Bolsunovsky Alexander Ya.
Reference: Journal of Siberian Federal University
ISSN: 1997-1389
DOI: 579.5:539.752+577(T2-575):582.16
Keywords: radionuclides; transfer factor; mushrooms; shrubs
Abstract: The study addresses accumulation of radionuclides by mushrooms and berry shrubs from the forest soil in the area around the Mining-and-Chemical Combine (the Krasnoyarskii Krai, Russia). The Suillus granulatus and S. luteus mushrooms have been found to be the best bioindicators in this area. The level of 137Cs concentration in these species can reach 10 kBq/kg dry mass. The 137Cs transfer factor (TF) by the mushrooms varies 5-fold among the sites that receive radionuclides from different sources. The level of radionuclide activities accumulated by berry shrubs is 2-3 orders of magnitude lower than the activities accumulated by mushrooms. Based on the calculated TFs, the distribution of 137Cs and 60Co among the parts of these shrubs is as follows: branches
URL: http://journal.sfu-kras.ru/en/article/1460/178
Author: Mironchik A. F.
Reference: Bulletin of Belorussian-Russian University, 2008
ISSN: 2077-8481
DOI: 631.438 : 658.562
Keywords: 90sr, 137cs, accumulation, agricultural products, before Chernobyl disaster
Abstract: The paper outlines the latitude dependence of radioactive substances fall-out after nuclear weapon tests on the territory of the globe and the accumulation of 137Cs and 90Sr in different kinds of agricultural products produced in the former USSR before the Chernobyl disaster. The available data are compared with results given by other countries.
URL: http://elibrary.ru/item.asp?id=17101280
Author: Podolyak A. G., Timofeev S. F., Grebenshikova N. V., Arastovich T. V., Zhdanovich V. P.
Reference: Gazette “РАДИАЦИОННАЯ БИОЛОГИЯ. РАДИОЭКОЛОГИЯ “ (Radiation Biology, Radioecology), 2005
ISSN: 0869-8031
DOI: 574.41.5:539.163:633.2.031:631.82: 631.86:546.36:546.42
Keywords: 137cs, 90sr, accumulation, agricultural sphere, soil
Abstract: On the basis of long-term stationary experience it was established that the minimum accumulation quantities for 137Cs and 90Sr in the herbage of the dry, lowland and flood-plain types of the Belarus Polessje meadows contaminated with Chernobyl radionuclides are determined when the optimum of basic agrochemical soil properties is achieved with application of the scientifically reasonable protective measures. For remote prognosis of radionuclide contents in natural and cultural meadow herbage the use of transfer factors (TFa, (Bq/kg)(kBq/m2)) based on the complex agrochemical parameters–agrochemical cultivation soil index (Icd) and basic saturation degree (V, %), which take into account some soil characteristics simultaneously, is a streamlined approach. This paper provides the equations of linear and multiple regressions, which can be used to calculate the transfer factors for 137Cs and 90Sr uptake and the herbage contamination degree for the main types of meadows of the region, that will allow reducing the volume of forage production (hay, green bulk), which is not adequate to established permissible levels: “Republican allowable levels of the contents of 137Cs and 90Sr in agricultural raw material and forages”.
URL: http://lib.bioinfo.pl/pmid:15810531
Author: E. K. Legin, Yu. I. Trifonov, M. L. Khokhlov, D. N. Suglobov, E. E. Legina, V. K. Legin
Reference: Gazette “Radiochemistry“, 2008
ISSN:
DOI: 10.1134/S1066362208010177
Keywords: strontium, decontamination, waterlogged soils, 90sr, 137cs, river
Abstract: Gleyzation-mediated leaching of radiostrontium from floodplain soils of the Krasnoyarsk Mining and Chemical Combine (MCC) activity zone [Atamanovskii Island (front part), Oseredysh Island (front part), and Berezovyi Island (rear part)] is studied with model systems. Leaching of radiostrontium from waterlogged soils is analyzed in terms of the model of anaerobic biosolubilization of gel films. The leaching of radiostrontium is found to correlate with that of iron, confirming the cosolubilization model. Addition of glucose (0.5%) as a stimulant for growth of iron-reducing microorganisms increases the dynamic coefficient of radiostrontium leaching, particularly in soils with lower organic matter content. The model experiments showed that the radiostrontium leaching rate from floodplain soil is higher by 2–3 orders of magnitude than that of radio-cesium, suggesting the possibility of escape of radiostrontium from the floodplain of the Yenisei River with the intrasoil runoff. This conclusion is supported by the experimental data on the 90Sr/137Cs ratio in the floodplain of the Yenisei River downstream of MCC (0.01–0.1).
URL: http://link.springer.com/article/10.1134%2FS1066362208010177?LI=true#
