Modelling of marine radionuclide dispersion in IAEA MODARIA program: Lessons learnt from the Baltic Sea and Fukushima scenarios

Periáñez, R.; Brovchenko, Igor; Duffa, Céline; Iøsjpe, M.; Jung, Kyung‐Ho; Kobayashi, Takuya; Lamego, Fernando; Maderich, Vladіmir; Min, B. I.; Nies, H.; Osvath, I.; Outola, Iisa; Psaltaki, M.; Suh, Kyung-Suk; With, G. de

doi:10.1016/j.scitotenv.2016.06.131

Cited by 33 publications

(18 citation statements)

References 31 publications

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“…The model output provides a detailed information on 3D distribution of radionuclides in the water column and in the bed and distribution of activity in each fraction of sediments. The simplified version of a model had been used in modelling of the radionuclide dispersion after the Fukushima accident [28,29]. The simulations of transport and migration in the bottom of 137 Cs after this accident using a full model with special attention to the effects of remobilization and burial processes of activity are in progress to be presented in next paper.…”

Section: Discussionmentioning

confidence: 99%

Migration of radioactivity in multi-fraction sediments

et al. 2017

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A new 3D radioactivity transport model coupled with multiscale circulation and multi-fractional sediment transport modules is presented. The sediment transport module simulates the transport of a mixture of one cohesive sediment fraction and a number of fractions of non-cohesive sediments of different sizes and densities. The model of radionuclide transport describes the key transport and exchange processes in the system of water-suspended and bottom multi-fraction sediments. Two-step kinetics with two successive reversible fast and slow reactions is used in the model. A noticeable feature of the model is approximation of the sediment and contamination profiles in the bed by multiple well-mixed layers to describe the vertical migration of radioactivity within bottom sediments due to erosion/deposition, molecular diffusion and bioturbation. The model accurately reproduced a laboratory experiment on the uptake of radiocesium by lake sediments. An analytical solution describing mutual adjustment of the concentrations of radioactivity in the pore water and in the multi-fraction sediment showed that activity was redistributed between different fractions of sediments far slower than between water and the total concentration in the sediment. The extended one-layer model of bottom contamination of multi-fraction sediments was derived from a general model and compared with a multilayer model. It was found, however, that the one-layer approximation was not capable of correctly predicting the inventory due to the fact that one-layer averaged concentration can essentially differ from the near-surface value in the multi-layer model. Radionuclide 123Environ Fluid Mech (2017) 17:1207-1231 DOI 10.1007 transport in channel with bottom depression was simulated to estimate the effects of erosion/deposition and the multi-fractionality of sediments on the transport process. It was shown that these factors affect the distribution of sediments by forming local maxima and minima of activity at the beginning and end of the depression, respectively, due to the redistribution of contaminated bottom sediments by flow. The developed model can also be used to simulate the transport of a wide class of toxic substances sorbed on sediments.

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Section: Discussionmentioning

confidence: 99%

Migration of radioactivity in multi-fraction sediments

et al. 2017

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“…The ocean is where the radionuclide accumulated from direct releases of nuclear installations, land deposition from the geomorphology process, atmospheric fall-out and cosmic ray exposure from outer space, and nuclear accidents [26]. In seawater, Pu naturally forms cations, such as Pu(III) 3+ , Pu(IV) 4+ , Pu(V)O 2 + , Pu(VI)O 2 2+ , and Pu(VII)O 4anion [27].…”

Section: ■ Results and Discussionmentioning

confidence: 99%

The Impact of <sup>242</sup>Pu Speciation on the Bioaccumulation of Plutonium by <i>Babylonia spirata</i> from Jakarta Bay

et al. 2021

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The research of bioaccumulation Plutonium of Babylonia spirata from Jakarta Bay using 242Pu radiotracer has been conducted. The aquaria experiments were applied by two oxidation states of Pu speciation with three replications. The experiment was carried out by 2 steps, such as uptake and depuration. The bioavailability of 242Pu in the (III) and (IV) oxidation states from sea has been studied for Babylonia spirata. Biokinetics parameters, such as concentration factors (CFss), uptake rate constants (ku), elimination rate constants (ke), bioconcentration factors (BCF), and biological half-life (tb1/2), were investigated. The dissection is carried out to separate the parts of the gastropod's body so that the target organs for Plutonium contamination can be identified. Each part of the gastropod's body was prepared radiochemically and analyzed using an alpha spectrometer. The research shows that Pu4+ is potentially accumulated in greater value than Pu3+ by B. spirata, in which Pu is more rapidly distributed and retained longer in proboscis and gastrointestinal tract.

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“…Tropical data are needed for MODARIA (Modeling and Data for Radiological Impact Assessments), International Atomic Energy Agency project. The results of this research are expected to contribute data on the bioaccumulation ability of Zn and Cs-137 by tropical benthic to the international project database (IAEA MODARIA) (Periáñez et al, 2016).…”

Section: Introductionmentioning

confidence: 94%

Bioaccumulation of Zn and 137Cs in Glauconomya virens (Linnaeus, 176) Upon Exposure to Sigle and Mixture of Zn or 137Cs and Salinity

Budiawan

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Puteri

et al. 2021

JPII

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This study aims to determine the effect of concentrations and salinity of seawater on the bioaccumulation of zinc and cesium in the Glauconomya virens. Salinity conditions and contaminant concentrations in the marine environment can change due to weather and other inputs. A biokinetic experiment was carried out using a single compartment approach that used radiotracer 65Zn and 137Cs. The experiments conducted were biota collection, acclimatization, bioaccumulation, and elimination. Acclimatization aims for the adaptation of biota in an experimental environment. Bioaccumulation was by placing the biota in an aquarium containing seawater media spiked by 65Zn, Zn, and 137Cs radiotracer contaminants. The elimination process was the release of contaminants from the body of the biota by placing them in clean and flowing seawater. The experimental results show that the uptake and elimination of Zn and Cs were influenced by these two parameters (water concentration and salinity). The highest value of Concentration Factor (CF) for Zn was 11.14 ml.g-1 under influences its concentration of 0.7 ppm in water. In the depuration process, Zn maintained by G virens were 39.44; 31.17; 23.62; and 23.92% after these organisms accumulate this element from seawater containing 0.1; 0.3, 0.5, and 0.7 ppm, respectively. The highest of 137Cs under influences its concentration of 3 Bg.ml-1 reached 2.65 mL.g-1. The effect of salinity is directly proportional to the factor value of Zn and 137Cs concentration.

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Modelling of marine radionuclide dispersion in IAEA MODARIA program: Lessons learnt from the Baltic Sea and Fukushima scenarios

Cited by 33 publications

References 31 publications

Migration of radioactivity in multi-fraction sediments

Migration of radioactivity in multi-fraction sediments

The Impact of <sup>242</sup>Pu Speciation on the Bioaccumulation of Plutonium by <i>Babylonia spirata</i> from Jakarta Bay

Bioaccumulation of Zn and 137Cs in Glauconomya virens (Linnaeus, 176) Upon Exposure to Sigle and Mixture of Zn or 137Cs and Salinity

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