Title: Tritium dispersion simulation in the atmosphere by the integral transform technique using micrometeorological parameters generated by large eddy simulation

Authors: Davidson Martins Moreira, Marco Tullio Vilhena, Pedro M.M. Soares, Rodrigo Martins Dorado

Addresses: Universidade Federal do Pampa – UNIPAMPA, Rua Carlos Barbosa S/N, Bairro Getulio Vargas, Bage, RS, Brazil. ' Universidade Federal do Rio Grande do Sul – UFRGS/PROMEC, Sarmento Leite, 425, 3° andar – Porto Alegre, RS, Brazil. ' Instituto Dom Luiz, Centro de Geofisica da Universidade de Lisboa, Faculdade de Ciencias da Universidade de Lisboa, Universidade de Lisboa, Edificio C8, Piso 3, Gab. 26, Campo Grande, 1749-016 Lisboa, Portugal. ' Universidade Federal do Pampa – UNIPAMPA, Rua Carlos Barbosa S/N, Bairro Getulio Vargas, Bage, RS, Brazil

Abstract: In this work, we report a numerical and statistical comparison between Advection-Diffusion Multilayer Method (ADMM) and Generalised Integral Laplace Transform Technique (GILTT) approaches to simulate a radioactive pollutant dispersion in the Atmospheric Boundary Layer (ABL) using micrometeorological parameters generated by Large Eddy Simulation (LES). To better describe the wind profile of the irregular ground level terrain, we considered the wind profile as a solution of the MesoNH model. We performed numerical simulations and comparisons against the data of Angra dos Reis-Brazil field experiments.

Keywords: large eddy simulation; LES; advection-diffusion equation; atmospheric boundary layer; ABL; nuclear power plants; nuclear energy; tritium dispersion; micrometeorological parameters; radioactive pollutants; air pollution; wind profile.

DOI: 10.1504/IJNEST.2010.030303

International Journal of Nuclear Energy Science and Technology, 2010 Vol.5 No.1, pp.11 - 24

Published online: 14 Dec 2009 *

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