Irène Korsakissok

Abstract. Polyphemus is an air quality modeling platform which aims at covering the scope and the abilities of modern air quality systems. It deals with applications from local scale to continental scale, using two Gaussian models and two Eulerian models. It manages passive tracers, radioactive decay, photochemistry and aerosol dynamics. The structure of the system includes four independent levels with data management, physical parameterizations, numerical solvers and high-level methods such as data assimilation. This enables sensitivity and uncertainty analysis, primarily through multimodel approaches. On top of the models, drivers implement advanced methods such as model coupling or data assimilation.

Following the Fukushima Daiichi Nuclear Power Plant (FNPP1) accident on March 2011, radioactive products were released in the atmosphere. Simulations at local scale (within 80 km of FNPP1) were carried out by the Institute of Radiation Protection and Nuclear Safety (IRSN) with the Gaussian Puff model pX, during the crisis and since then, to assess the radiological and environmental consequences. The evolution of atmospheric and ground activity simulated at local scale is presented with a “reference” simulation, whose performance is assessed through comparisons with environmental monitoring data (gamma dose rate and deposition). The results are within a factor of 2–5 of the observations for gamma dose rates (0.52 and 0.85 for FAC2 and FAC5), and 5–10 for deposition (0.31 for FAC2, 0.73 for FAC5 and 0.90 for FAC10). A sensitivity analysis is also made to highlight the most sensitive parameters. A source term comparison is made between IRSN's estimation, and those from Katata et al. (2012) and Stohl et al. (2011). Results are quite sensitive to the source term, but also to wind direction and dispersion parameters. Dry deposition budget is more sensitive than wet deposition. Gamma dose rates are more sensitive than deposition, in particular peak values.

Research Article| June 01, 2012 Atmospheric Dispersion and Deposition of Radionuclides from the Fukushima Daiichi Nuclear Power Plant Accident Anne Mathieu; Anne Mathieu Corresponding author e-mail: Anne.Mathieu@irsn.fr Search for other works by this author on: GSW Google Scholar Irène Korsakissok; Irène Korsakissok Search for other works by this author on: GSW Google Scholar Denis Quélo; Denis Quélo Search for other works by this author on: GSW Google Scholar Jérôme Groëll; Jérôme Groëll Search for other works by this author on: GSW Google Scholar Marilyne Tombette; Marilyne Tombette Search for other works by this author on: GSW Google Scholar Damien Didier; Damien Didier Search for other works by this author on: GSW Google Scholar Emmanuel Quentric; Emmanuel Quentric Search for other works by this author on: GSW Google Scholar Olivier Saunier; Olivier Saunier Search for other works by this author on: GSW Google Scholar Jean-Pierre Benoit; Jean-Pierre Benoit Search for other works by this author on: GSW Google Scholar Olivier Isnard Olivier Isnard *All from IRSN, Institute of Radiation Protection and Nuclear Safety, Fontenay-aux-Roses 92262 Cedex, France Search for other works by this author on: GSW Google Scholar Author and Article Information Anne Mathieu Irène Korsakissok Denis Quélo Jérôme Groëll Marilyne Tombette Damien Didier Emmanuel Quentric Olivier Saunier Jean-Pierre Benoit Olivier Isnard *All from IRSN, Institute of Radiation Protection and Nuclear Safety, Fontenay-aux-Roses 92262 Cedex, France Corresponding author e-mail: Anne.Mathieu@irsn.fr Publisher: Mineralogical Society of America First Online: 09 Mar 2017 Online ISSN: 1811-5217 Print ISSN: 1811-5209 © 2012 by the Mineralogical Society of America Elements (2012) 8 (3): 195–200. https://doi.org/10.2113/gselements.8.3.195 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Anne Mathieu, Irène Korsakissok, Denis Quélo, Jérôme Groëll, Marilyne Tombette, Damien Didier, Emmanuel Quentric, Olivier Saunier, Jean-Pierre Benoit, Olivier Isnard; Atmospheric Dispersion and Deposition of Radionuclides from the Fukushima Daiichi Nuclear Power Plant Accident. Elements 2012;; 8 (3): 195–200. doi: https://doi.org/10.2113/gselements.8.3.195 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyElements Search Advanced Search Abstract On March 11, 2011, an earthquake and tsunami hit the northeast coast of Japan and damaged the Fukushima Daiichi nuclear power plant, leading to the release of radioactive material into the atmosphere. We trace the evolution of radioactivity release to the atmosphere and subsequent dispersion as simulated by models, and we compare these to actual measurements. Four main release periods are highlighted. The first event had limited consequences to the north of the power plant along the coast; the second had no impact on Japanese territory because the plumes travelled toward the Pacific Ocean; the third was responsible for significant and long-term impact, especially northwest of the plant; and the last had consequences of lesser impact on the Tokyo area. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.