Abstract
ABSTRACTWe have developed a coupled transport and reaction computer program which is adapted to handle sharp reaction fronts. Such fronts develop in the ground and typical examples are redox fronts and dissolution/precipitation fronts. The program is developed to describe the chemical evolution around radioactive waste repositories but it is applicable to other situations as well. To validate the program we compare our results with data from other geochemical equilibrium programs, such as EQ3/6 [1], PHREEQE [2] and transport programs such as CHEQMATE [3]. Natural analogues like the Osamu Utsumi mine at Poços de Caldas in Brazil and the uranium ore body at Cigar Lake in Saskatoon, Canada, are studied using the program.
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