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Enhancing Nuclear Safety


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Data assimilation for short-range dispersion of radionuclides : An application to wind tunnel data


Journal title : Atmospheric Environment
Issue : 38
Pagination : 7267-7279
Publication date : 01/12/2006

Document type > *Article de revue

Keywords > atmospheric dispersion, radionuclides

Research Unit > IRSN/DEI/SESUC/BMTA

Authors > BOCQUET Marc, ISNARD Olivier, KRYSTA Marc, SPORTISSE Bruno

Publication Date > 01/12/2006

Summary

This work contributes to improvement in consequences evaluation for a release of radioactivity to the atmosphere at local scale. An investigation of how such an improvement could be achieved with the help of variational data assimilation is presented. The measurements collected in a wind tunnel experiment are coupled to a Gaussian puff model. Capacity of finding the true source emission rate is tackled in the first place. Secondly, data assimilation is employed to accommodate the computed concentration profiles to the measured ones. Benefit from data assimilation is subject to the quantity of information contained in the measurements. Therefore, posterior analysis of the monitoring network is carried out and its quality assessed.


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