VIEIRA de SA, B.L.HIROMOTO, G.2014-11-172014-11-182015-04-022014-11-172014-11-182015-04-02VIEIRA de SA, B.L.; HIROMOTO, G. Simplified semi-analytical model for mass transport simulation in unsaturated zone. In: REGIONAL CONGRESS ON RADIATION PROTECTION AND SAFETY, 5th, REGIONAL IRPA CONGRESS, Apr. 29 - May 4, 2001, Recife, PE. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/15238.http://repositorio.ipen.br/handle/123456789/15238This paper describes a simple model to determine the flux of radionuclides released from a concrete vault repository and its implementation through the development of a computer program. The radionuclide leach rate from waste is calculated using a model based on simple first order kinetics and the transport through porous media bellow the waste is determined using a semi-analytical solution of the mass transport equation. Results obtained in the AIEA intercomparison program are also related in this communication.openAccessradioactive wastesradionuclide migrationcomputerized simulationcomputer codesradioactive waste disposalsafety analysiscomparative evaluationsTexto completo de evento