Fukushima 137Cs releases dispersion modelling over the Pacific Ocean. Comparisons of models with water, sediment and biota data.

A number of marine radionuclide dispersion models (both Eulerian and Lagrangian) were applied to simulate 137Cs releases from Fukushima Daiichi nuclear power plant accident in 2011 over the Pacific at oceanic scale. Simulations extended over two years and both direct releases into the ocean and deposition of atmospheric releases on the ocean surface were considered. Dispersion models included an embedded biological uptake model (BUM). Three types of BUMs were used: equilibrium, dynamic and allometric. Model results were compared with 137Cs measurements in water (surface, intermediate and deep layers), sediment and biota (zooplankton, non-piscivorous and piscivorous fish). A reasonable agreement in model/model and model/data comparisons was obtained.

[1]  Haruyasu Nagai,et al.  Source term estimation of atmospheric release due to the Fukushima Dai-ichi Nuclear Power Plant accident by atmospheric and oceanic dispersion simulations , 2013 .

[2]  R. Heling,et al.  A dynamical approach for the uptake of radionuclides in marine organisms for the POSEIDON model system , 2002 .

[3]  S. Jayne,et al.  Radium-based estimates of cesium isotope transport and total direct ocean discharges from the Fukushima Nuclear Power Plant accident , 2012 .

[4]  T. Morita,et al.  Effects of the nuclear disaster on marine products in Fukushima: An update after five years. , 2016, Journal of environmental radioactivity.

[5]  M. Dowdall,et al.  The Derivation of Transfer Parameters in the Assessment of Radiological Impacts on Arctic Marine Biota , 2004 .

[6]  R Heling,et al.  Regional long-term model of radioactivity dispersion and fate in the Northwestern Pacific and adjacent seas: application to the Fukushima Dai-ichi accident. , 2014, Journal of environmental radioactivity.

[7]  K. Fujikura,et al.  Horizontal distribution of Fukushima-derived radiocesium in zooplankton in the northwestern Pacific Ocean , 2013 .

[8]  N. Beresford,et al.  Radiological dose rates to marine fish from the Fukushima Daiichi accident: the first three years across the North Pacific. , 2015, Environmental science & technology.

[9]  W. Hwang,et al.  Verification of the Lagrangian particle model using the ETEX experiment , 2006 .

[10]  P. Santschi,et al.  A kinetic approach to describe trace-element distribution between particles and solution in natural aquatic systems , 1984 .

[11]  Stefan Willemsen,et al.  Transfer of radiocaesium from contaminated bottom sediments to marine organisms through benthic food chains in post-Fukushima and post-Chernobyl periods , 2016 .

[12]  V. Maderich,et al.  A comparison of marine radionuclide dispersion models for the Baltic Sea in the frame of IAEA MODARIA program. , 2015, Journal of environmental radioactivity.

[13]  P. Protter.  Stochastic integration and differential equations , 1990 .

[14]  勇 広田,et al.  An Introduction to Geophysical Fluid Dynamics , 1970 .

[15]  Kyung-Suk Suh,et al.  Numerical simulation for a long-range dispersion of a pollutant using Chernobyl data , 2009, Math. Comput. Model..

[16]  In-Gyu Kim,et al.  Marine dispersion assessment of 137Cs released from the Fukushima nuclear accident. , 2013, Marine pollution bulletin.

[17]  Yosuke Fujii,et al.  Four-dimensional variational ocean reanalysis: a 30-year high-resolution dataset in the western North Pacific (FORA-WNP30) , 2017, Journal of Oceanography.

[18]  Hisashi Nakamura,et al.  A Numerical Simulation of Global Transport of Atmospheric Particles Emitted from the Fukushima Daiichi Nuclear Power Plant , 2011 .

[19]  Haruyasu Nagai,et al.  Atmospheric discharge and dispersion of radionuclides during the Fukushima Dai-ichi Nuclear Power Plant accident. Part II: verification of the source term and analysis of regional-scale atmospheric dispersion. , 2012, Journal of environmental radioactivity.

[20]  James H. Brown,et al.  A General Model for the Origin of Allometric Scaling Laws in Biology , 1997, Science.

[21]  P. Masqué,et al.  Dispersion and fate of ⁹⁰Sr in the Northwestern Pacific and adjacent seas: global fallout and the Fukushima Dai-ichi accident. , 2014, The Science of the total environment.

[22]  Longshan Lin,et al.  Radioactive impacts on nekton species in the Northwest Pacific and humans more than one year after the Fukushima nuclear accident. , 2017, Ecotoxicology and environmental safety.

[23]  Daniel R. Lynch,et al.  Modeling turbulent dispersion on the North Flank of Georges Bank using Lagrangian Particle Methods , 2005 .

[24]  Tomoharu Nakayama,et al.  Oceanic dispersion of Fukushima-derived Cs-137 simulated by multiple oceanic general circulation models. , 2017, Journal of environmental radioactivity.

[25]  Byung-Il Min,et al.  The behaviour of 137Cs in the North Atlantic Ocean assessed from numerical modelling: Releases from nuclear fuel reprocessing factories, redissolution from contaminated sediments and leakage from dumped nuclear wastes. , 2016, Marine pollution bulletin.

[26]  David C Kocher,et al.  Derivation of a screening methodology for evaluating radiation dose to aquatic and terrestrial biota. , 2003, Journal of environmental radioactivity.

[27]  Keisuke Hayashi,et al.  Development of a Non-conservative Radionuclides Dispersion Model in the Ocean and its Application to Surface Cesium-137 Dispersion in the Irish Sea , 2007 .

[28]  Marc Bocquet,et al.  A review of the model comparison of transportation and deposition of radioactive materials released to the environment as a result of the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Plant accident , 2014 .

[29]  Avichal Mehra,et al.  Oceanic Dispersion Simulations of 137Cs Released from the Fukushima Daiichi Nuclear Power Plant , 2012 .

[30]  A. Elliott,et al.  A particle-tracking method for simulating the dispersion of non-conservative radionuclides in coastal waters. , 2002, Journal of environmental radioactivity.

[31]  Igor Brovchenko,et al.  Integration of 3D model THREETOX in JRODOS, implementation studies and modelling of Fukushima scenarios , 2016 .

[32]  V. Maderich,et al.  Modelling of marine radionuclide dispersion in IAEA MODARIA program: Lessons learnt from the Baltic Sea and Fukushima scenarios. , 2016, The Science of the total environment.

[33]  Raúl Periáñez.  Modelling the Dispersion of Radionuclides in the Marine Environment: An Introduction , 2005 .

[34]  Hyoe Takata,et al.  Spatiotemporal distributions of Fukushima-derived radionuclides in nearby marine surface sediments , 2013 .

[35]  Igor Brovchenko,et al.  Development and application of 3D numerical model THREETOX to the prediction of cooling water transport and mixing in the inland and coastal waters , 2008 .

[36]  J. Vives i Batlle,et al.  Dynamic model for the assessment of radiological exposure to marine biota. , 2008, Journal of environmental radioactivity.

[37]  Daniel R. Lynch,et al.  Particles in the Coastal Ocean: Theory and Applications , 2014 .

[38]  Igor Brovchenko,et al.  Migration of radioactivity in multi-fraction sediments , 2017, Environmental Fluid Mechanics.

[39]  Lars Håkanson,et al.  Experiences from a case study of multi-model application to assess the behaviour of pollutants in the Dnieper–Bug Estuary , 2006 .

[40]  Igor Brovchenko,et al.  A new comparison of marine dispersion model performances for Fukushima Dai-ichi releases in the frame of IAEA MODARIA program. , 2015, Journal of environmental radioactivity.

[41]  Tatsuo Aono,et al.  Dispersion of artificial caesium-134 and -137 in the western North Pacific one month after the Fukushima accident , 2012, GEOCHEMICAL JOURNAL.

[42]  T. Ono,et al.  Direct observation of 134 Cs and 137 Cs in surface seawater in the western and central North Pacific after the Fukushima Dai-ichi nuclear power plant accident , 2013 .

[43]  R Heling,et al.  POSEIDON/RODOS models for radiological assessment of marine environment after accidental releases: application to coastal areas of the Baltic, Black and North Seas. , 2004, Journal of environmental radioactivity.

[44]  D LePoire,et al.  Inter-comparison of dynamic models for radionuclide transfer to marine biota in a Fukushima accident scenario. , 2016, Journal of environmental radioactivity.

[45]  F. Carvalho,et al.  Radionuclide concentration processes in marine organisms: A comprehensive review. , 2017, Journal of environmental radioactivity.

[46]  V. Maderich,et al.  Similarities and differences of 137Cs distributions in the marine environments of the Baltic and Black seas and off the Fukushima Dai-ichi nuclear power plant in model assessments. , 2018, Marine pollution bulletin.