Abstract

In the present work we use an Eulerian diffusion approach as the base for a micro-meteorologicaldispersion parametrisation for short range radioactive contamination modelling in the An-gra dos Reis nuclear power plant site. The closure of the diffusion equation is implementedby means of eddy diffusivity (K-theory). The parametrisations for the eddy diffusivity co-efficients are determined from micro-meteorological parameters that were extracted frommeso-scale Weather Research and Forecasting (WRF) simulations. The model is based onTaylors statistical theory together with a model for Eulerian turbulence spectra from a su-perposition of a buoyant and a shear contribution. We implement an interface between aLES model for the planetary boundary layer and orography related features of WRF andsimulate four days, from February, the 1st to the 4th of 2010, for the environment aroundthe nuclear power plant site at Angra dos Reis, Rio de Janeiro state, Brazil. After extractionof micro-meteorological data we determined the eddy diffusivities under the hypothesis ofhomogeneous turbulence. As the principal result we show the time dependence (for the timescale of a day) of the dimensionless vertical eddy diffusivity coefficients.

Autore Pugliese

• Mangia Cristina , Rizza Umberto

Tutti gli autori

• U.Rizza ; M.T. Vilhena; B. Bodmann; G.A. Degrazia; C.Mangia

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2012

ISSN

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ISBN

978-85-63688-00-2

Numero di citazioni Wos

Nessuna citazione

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Settori ERC

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Codici ASJC

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