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90Sr and 89Sr in Seawater Off Japan as a Consequence of the Fukushima Dai-ichi Nuclear Accident : Volume 10, Issue 2 (05/02/2013)

By Casacuberta, N.

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Book Id: WPLBN0004004352
Format Type: PDF Article :
File Size: Pages 29
Reproduction Date: 2015

Title: 90Sr and 89Sr in Seawater Off Japan as a Consequence of the Fukushima Dai-ichi Nuclear Accident : Volume 10, Issue 2 (05/02/2013)  
Author: Casacuberta, N.
Volume: Vol. 10, Issue 2
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Buesseler, K. O., Garcia-Orellana, J., Masqué, P., Casacuberta, N., & Garcia-Tenorio, R. (2013). 90Sr and 89Sr in Seawater Off Japan as a Consequence of the Fukushima Dai-ichi Nuclear Accident : Volume 10, Issue 2 (05/02/2013). Retrieved from http://www.worldebookfair.org/


Description
Description: Institut de Ciència i Tecnologia Ambientals and Departament de Física, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès (Barcelona), Spain. The impact of the earthquake and tsunami in the east coast of Japan in 11 March 2011 caused a loss of power at the Fukushima Dai-ichi Nuclear Power Plant (NPP) that resulted in one of the most important releases of artificial radioactivity to the environment. Although several works were devoted to evaluate the atmospheric dispersion of radionuclides, the impact of the discharges to the ocean has been less investigated. Here we evaluate the distribution of Fukushima-derived 90Sr and 89Sr throughout waters 30–600 km offshore in June 2011. Concentrations of 90Sr and 89Sr in both surface waters and shallow profiles ranged from 0.8 ± 0.2 to 85 ± 3 Bq m−3 and from 19 ± 6 to 265 ± 74 Bq m−3, respectively. Because of its short half-life, all measured 89Sr was due to the accident, while the 90Sr concentrations can be compared to the background levels in the Pacific Ocean of about 1.2 Bq m−3. Fukushima-derived radiostrontium was mainly detected north of Kuroshio Current, as this was acting as a southern boundary for transport. The highest activities were associated with near-shore eddies, and larger inventories were found in the closest stations to Fukushima NPP. The data evidences a major influence of direct liquid discharges of radiostrontium compared to the atmospheric deposition. Existing 137Cs data reported from the same samples allowed us establishing a 90Sr/137Cs ratio of 0.0256 ± 0.0006 in seawater off Fukushima, being significantly different than that of the global atmospheric fallout (i.e. 0.63) and may be used in future studies to track waters coming from the east coast of Japan. Liquid discharges of 90Sr to the ocean were estimated, resulting in an inventory of 53 ± 1 TBq of 90Sr in the inshore study area in June 2011 and total releases of 90Sr ranging from 90 to 900 TBq, depending upon the reported estimates of 137Cs releases that are considered.

Summary
90Sr and 89Sr in seawater off Japan as a consequence of the Fukushima Dai-ichi nuclear accident

Excerpt
Bailly du Bois, P., Laguionie, P., Boust, D., Korsakissok, I., and Didier, D.: Estimation of marine source-term following Fukushima Dai-ichi accident, J. Environ. Radioactiv., 114, 2–9, 2012.; Buesseler, K. O., Aoyama, M., and Fukasawa, M.: Impacts of the Fukushima nuclear power plants on marine radioactivity, Environ. Sci. Technol., 45, 9931–9935, 2011.; Hisamatsu, S.: Environmental impacts of the Fukushima accident, special issue, J. Environ. Radioactiv., 111, 1–126, 2012.; Buesseler, K. O., Jayne, S. R., Fisher, N. S., Rypina, I. I., Baumann, H., Baumann, Z., Breier, C. F., Douglass, E. M., George, J., Macdonald, A. M., Miyamoto, H., Nishikawa, J., Pike, S. M., and Yoshida, S.: Fukushima-derived radionuclides in the ocean and biota off Japan, P. Natl. Acad. Sci. USA, 109, 5984–5988, 2012.; Casacuberta, N., Masqué, P., Garcia-Orellana, J., López-Castillo, E., Kenna, T. C., and García-Tenorio, R.: A sequential method for the determination of 90Sr, Pu- isotopes and 137Cs in seawater, in preparation, 2013.; Chino, M., Nakayama, H., Nagai, H., Terada, H., Katata, G., and Yamazawa, H.: Preliminary estimation of release amounts of 131I and 137Cs accidentally discharged from the Fukushima Daiichi Nuclear Power Plant into the atmosphere, J. Nucl. Sci. Technol., 48, 1129–1134, 2011.; Ikeuchi, Y.: Temporal variations of 90Sr and 137Cs concentrations in Japanese coastal surface seawater and sediments from 1974 to 1998, Deep-Sea Res. Pt. II, 50, 2713–2726, 2003.; Ikeuchi, Y., Amano, H., Aoyama, M., Berezhnov, V. I., Chaykovskaya, E., Chumichev, V. B., Chung, C. S., Gastaud, J., Hirose, K., Hong, G. H., Kim, C. K., Kim, S. H., Miyao, T., Morimoto, T., Nikitin, A., Oda, K., Pettersson, H. B. L., Povinec, P. P., Tkalin, A., Togawa, O., and Veletova, N. K.: Anthropogenic radionuclides in seawater of the far eastern seas, Sci. Total Environ., 237/238, 203–212, 1999.; Harvey, B. R., Ibbett, R. D., Lovett, M. B., and Williams, K. J.: Analytical Procedures for the Determination of Strontium Radionuclides in Environmental Materials, Ministry of Agriculture, Fisheries and Food Derectorate of Fisheries Research, Aquatic Environment Protection, Lowestoft, 33 pp., 1989.; Herranz, M., Idoeta, R., and Legarda, F.: Analysis of uncertainties and detection limits for the double measurement method of 90Sr and 89Sr, Radiat. Meas., 46, 680–686, 2011.; International Atomic Energy Agency, IAEA: Chernobyl's Legacy: Health, Environmental and Socio-Economic Impacts, IAEA, Vienna, 2003.; International Atomic Energy Agency, IAEA: Worldwide Marine Radioactivity Studies (WOMARS), Radionuclide Levels in Oceans and Seas, IAEA, Vienna, 2005.; International Commission Radiological Protection: Age-Dependent Doses to Members of the Public from Intake of Radionuclides: Part 2. International Commission on Radiological Protection Publ 67, Ann. ICRP, 23, 1–167, 1993.; Kawamura, H., Kobayashi, T., Furuno, A., In, T., Ishi

 

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