A5048277123- Radioactive contamination and transfer
- Nuclear and radioactivity studies
- Radioactivity and Radon Measurements
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Risk Perception and Management
- Meteorological Phenomena and Simulations
- Air Quality and Health Impacts
- Graphite, nuclear technology, radiation studies
- Nuclear reactor physics and engineering
- Vehicle emissions and performance
- Atmospheric aerosols and clouds
- Wind and Air Flow Studies
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Radioactive element chemistry and processing
- Manufacturing Process and Optimization
- Geophysical Methods and Applications
- Groundwater flow and contamination studies
- Particle Dynamics in Fluid Flows
- Control Systems in Engineering
- Aeolian processes and effects
- 3D Shape Modeling and Analysis
- Advanced Numerical Analysis Techniques
Institut de Radioprotection et de Sûreté Nucléaire
1970-2022
Atomic Weapons Establishment
2022
Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2002-2007
École nationale des ponts et chaussées
2002-2007
Institut national de recherche en informatique et en automatique
2005-2007
Abstract. Polyphemus is an air quality modeling platform which aims at covering the scope and abilities of modern systems. It deals with applications from local scale to continental scale, using two Gaussian models Eulerian models. manages passive tracers, radioactive decay, photochemistry aerosol dynamics. The structure system includes four independent levels data management, physical parameterizations, numerical solvers high-level methods such as assimilation. This enables sensitivity...
Abstract. The Chernobyl nuclear accident, and more recently the Fukushima highlighted that largest source of error on consequences assessment is term, including time evolution release rate its distribution between radioisotopes. Inverse modeling methods, which combine environmental measurements atmospheric dispersion models, have proven efficient in assessing term due to an accidental situation (Gudiksen, 1989; Krysta Bocquet, 2007; Stohl et al., 2012a; Winiarek 2012). Most existing...
Research Article| June 01, 2012 Atmospheric Dispersion and Deposition of Radionuclides from the Fukushima Daiichi Nuclear Power Plant Accident Anne Mathieu; Mathieu Corresponding author e-mail: Anne.Mathieu@irsn.fr Search for other works by this on: GSW Google Scholar Irène Korsakissok; Korsakissok Denis Quélo; Quélo Jérôme Groëll; Groëll Marilyne Tombette; Tombette Damien Didier; Didier Emmanuel Quentric; Quentric Olivier Saunier; Saunier Jean-Pierre Benoit; Benoit Isnard *All IRSN,...
Abstract A model intercomparison of the atmospheric dispersion cesium‐137 ( 137 Cs) emitted after Fukushima Daiichi Nuclear Power Plant accident in Japan was conducted to understand behavior Cs greater detail. The same meteorological data with a fine spatiotemporal resolution and an emission inventory were applied all models exclude differences among originating from data. used for initial, boundary, nudging or offline field. Furthermore, horizontal grid as that adopted models. This setup...
The third model intercomparison project (MIP) for investigating the atmospheric behavior of caesium-137 (137Cs) emitted from Fukushima Daiichi Nuclear Power Plant (FDNPP) (3rd FDNPP-MIP), Japan, in March 2011, was conducted. A finer horizontal grid spacing (1 km) used than previous FDNPP-MIP (2nd FDNPP-MIP, Sato et al., 2018; 3 to evaluate models' performance high-concentration events measured near FDNPP. Nine models 2nd were also 3rd and all identical source terms meteorological fields....
This paper describes a three-dimensional chemistry transport model, POLAIR, with special focus on numerical aspects. POLAIR is fully modular eulerian model. Several different chemical mechanisms are available, which can deal photochemistry (Racm, Radm, etc.), continental impact (e.g. passive transport), mercury, aerosols, etc. designed to enable simulations from regional scales scales. A few at those have been conducted assess and improve the code. Beyond forward simulations, inverse...
After performing a first multi-model exercise in 2015 comprehensive and technically more demanding atmospheric transport modelling challenge was organized 2016. Release data were provided by the Australian Nuclear Science Technology Organization radiopharmaceutical facility Sydney (Australia) for one month period. Measured samples same time frame gathered from six International Monitoring System stations Southern Hemisphere with distances to source ranging between 680 (Melbourne) about...
Abstract Since the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in March 2011, atmospheric simulation models have improved our understanding of behavior radionuclides. Model intercomparisons provide valuable and useful information for evaluating validity variability individual model results. In this study, we compared results seven transport used to simulate 137 Cs released from FDNPP atmosphere. All analysis had been submitted a intercomparison project Science Council Japan (2014,...
The ability of operational atmospheric transport models to simulate the soil contamination caused by deposition processes is important in response a nuclear crisis. Fukushima accident was characterized wet Cs-137, which difficult accurately based on observations. A sensitivity study investigated seven schemes integrated into models. Deposition maps produced from multiple simulations are compared with each other and observed deposition. Similarities discrepancies average behavior presented...
According to the Global Burden of Diseases, PM2.5 (particles with a diameter under 2.5 µm) is leading cause diseases and deaths in 2021 (Brauer et al., 2024). Along decreased emissions, removal through deposition used reduce exposure particulate matter (PM). With leaf area index (m² per m² land) usually higher than 1, plants allow for surface, hence more particle from ambient air. Thus, understanding estimating PM on vegetation necessary assess impact air quality....
The purpose of this article is to perform the inverse modeling emissions at regional scale for photochemical applications. case study region Lille in northern France simulations May 1998. chemistry‐transport model, Polair3D, has been validated with 1 year model‐to‐observation comparisons over Lille. Polair3D an adjoint mode, which enables a variational approach. A sensitivity analysis performed so as select emission parameters be modified order improve ozone forecasts. It shown that time...
In nuclear emergency management, wet deposition modelling is of crucial importance for correctly evaluating soil contamination after an atmospheric release. Wet generally divided into two main processes: in-cloud scavenging (rainout) and below-cloud (washout). The large number schemes proposed in the literature both processes reflects uncertainties our current understanding these phenomena. There presently no scientific consensus to discriminate between processes. order improve magnitude...
Modeling studies on the atmospheric diffusion and deposition of radiocesium associated with Fukushima Dai-ichi Nuclear Power Plant accident is reviewed here, a focus research collaboration between l'Institut de Radioprotection et Sûreté Nucléaire (IRSN)—the French institute in charge evaluating consequences nuclear accidents advising authorities case crisis—and Meteorological Research Institute (MRI) Japan Agency—an operational weather forecasting center Japan. While modelers have come to...
Abstract. There is a need for validation framework long-range atmospheric transport modelling dedicated to radionuclides. For distances greater than 50 km, the of radionuclide deposition and ambient gamma dose rate evaluation are particularly difficult validate, since it has been mainly only observed after accidents Chernobyl Fukushima. however natural wet phenomenon leading numerous well-observed events: scavenging radon-222 progeny by rain. Radon-222 exhalation from soil atmosphere, its...
Dispersion of radioactive material released to the atmosphere from Fukushima Daiichi Nuclear Power Plant accident in Japan was modelled assist French Government effectively providing public health advice its citizens Japan. It required estimation radiation doses based on realistic scenarios and atmospheric dispersion modelling. In this paper, sensitivity studies are conducted measure influence several parameters predicted contaminated zone. Priority is given ground deposition caesium 137...
In 2011 the IRSN conducted several assessments of atmospheric radioactive releases due to Fukushima Daiichi NPP accident (March 11, 2011) and their impact on Japan's terrestrial environment. They were based IRSN's emergency management tools abundant information technical data gradually published in Japan. According these assessments, main release phase lasted from March 12 25, impacted Japanese land two events, first 15 16 March, which deposits formed, second 20 23, was less significant. The...
In 2015 and 2016, atmospheric transport modeling challenges were conducted in the context of Comprehensive Nuclear-Test-Ban Treaty (CTBT) verification, however, with a more limited scope respect to emission inventories, simulation period number relevant samples (i.e., those above Minimum Detectable Concentration (MDC)) involved. Therefore, comprehensive challenge was organized 2019. Stack release data Xe-133 provided by Institut National des Radioéléments/IRE (Belgium) Canadian Nuclear...
Abstract. Polyphemus is an air quality modeling platform which aims at covering the scope and abilities of modern systems. It deals with applications from local scale to continental scale, using two Gaussian models Eulerian models. manages passive tracers, radioactive decay, photochemistry aerosol dynamics. The structure system includes four independent levels data management, physical parameterizations, numerical solvers high-level methods such as assimilation. This enables sensitivity...
Abstract. The Chernobyl nuclear accident and more recently the Fukushima highlighted that largest source of error on consequences assessment is term including time evolution release rate its distribution between radioisotopes. Inverse modeling methods, which combine environmental measurements atmospheric dispersion models, have proven efficient in assessing due to an accidental situation (Gudiksen, 1989; Krysta Bocquet, 2007; Stohl et al., 2012a; Winiarek 2012). Most existing approaches are...
Many numerical strategies have been specifically developed for chemistry‐transport models. Since no exact solutions are available 3‐D real problems, there only few insights to choose between alternative schemes and approximations, or estimate the performance discrepancy two approaches. However it is possible assess importance of approximations through comparison different strategies. We estimated impact several advection, diffusion stiff chemistry. also addressed operator splitting with...