Local scale marine modelling of Fukushima releases. Assessment of water and sediment contamination and sensitivity to water circulation description.

The dispersion of (137)Cs released from Fukushima nuclear power plant to the sea after the March 11th 2011 tsunami has been studied using numerical models. The 3D dispersion model consists of an advection/diffusion equation with terms describing uptake/release reactions between water and seabed sediments. The dispersion model has been fed with daily currents provided by HYCOM and JCOPE2 ocean models. Seabed sediment (137)Cs patterns obtained using both current data set have been compared. The impact of tides and of atmospheric deposition has been evaluated as well. It has been also found that a 2-step kinetic model (two consecutive reversible reactions) for describing water/sediment interactions produces better results than a 1-step model (one single reversible reaction).

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

[2]  J. Carroll,et al.  Environmental Compartments: Equilibria and Assessment of Processes Between Air, Water, Sediments and Biota , 1996 .

[3]  Roger Proctor,et al.  Modelling tides and surface drift in the Arabian Gulf—application to the Gulf oil spill , 1994 .

[4]  R. Mrabet,et al.  Experimental and modelling study of plutonium uptake by suspended matter in aquatic environments from southern Spain. , 2001, Water research.

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

[6]  Y. Ishikawa,et al.  Preliminary Numerical Experiments on Oceanic Dispersion of 131I and 137Cs Discharged into the Ocean because of the Fukushima Daiichi Nuclear Power Plant Disaster , 2011 .

[7]  R Periáñez,et al.  Environmental modelling in the Gulf of Cadiz: heavy metal distributions in water and sediments. , 2009, The Science of the total environment.

[8]  D. Pugh.  Tides, Surges and Mean Sea-Level , 1987 .

[9]  P. Povinec,et al.  Long-term simulations of the 137Cs dispersion from the Fukushima accident in the world ocean. , 2012, Journal of environmental radioactivity.

[10]  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.

[11]  Raúl Periáñez,et al.  Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study , 2003 .

[12]  Ra L. Peri Nez.  Modelling the Dispersion of Radionuclides in the Marine Environment , 2008 .

[13]  R. Periáñez.  Modelling the tidal dispersion of and in the English Channel , 2000 .

[14]  R Periáñez,et al.  Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model. , 2004, Journal of environmental radioactivity.

[15]  Takaki Tsubono,et al.  Distribution of oceanic 137Cs from the Fukushima Dai-ichi Nuclear Power Plant simulated numerically by a regional ocean model. , 2012, Journal of environmental radioactivity.

[16]  Raúl Periáñez,et al.  Kinetic modelling of the dispersion of plutonium in the eastern Irish Sea: two approaches , 2003 .

[17]  R. Periáñez.  Modelling the environmental behaviour of pollutants in Algeciras Bay (south Spain). , 2012, Marine pollution bulletin.

[18]  Andrew Turner,et al.  The solid-solution partitioning of trace metals in the southern North Sea—in situ radiochemical experiments , 1992 .

[19]  Andrew Turner,et al.  Partitioning of trace metals in a macrotidal estuary. Implications for contaminant transport models , 1994 .

[20]  津旨 大輔,et al.  Distribution of oceanic 137Cs from the Fukushima Daiichi Nuclear Power Plant simulated numerically by a regional ocean model , 2011 .

[21]  P Ciffroy,et al.  Kinetics of the adsorption and desorption of radionuclides of Co, Mn, Cs, Fe, Ag and Cd in freshwater systems: experimental and modelling approaches. , 2001, Journal of environmental radioactivity.

[22]  K. Tani,et al.  Determination of Hf isotope ratios in zircon using multiple collector-inductively coupled plasma mass spectrometry equipped with laser ablation and desolvating nebulizer dual sample introduction system , 2012 .

[23]  P. McDonald,et al.  Remobilization of Sellafield-derived radionuclides and transport from the north-east Irish Sea , 1997 .

[24]  R Periáñez,et al.  A modelling study on 137Cs and 239,240Pu behaviour in the Alborán Sea, western Mediterranean. , 2008, Journal of environmental radioactivity.

[25]  Y. Saito.  Late Pleistocene coastal sediments, drainage patterns and sand ridge systems on the shelf off Sendai, Northeast Japan , 1989 .

[26]  I. Korsakissok,et al.  Estimation of marine source-term following Fukushima Dai-ichi accident. , 2012, Journal of environmental radioactivity.