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Modeling of the Mixing of Cement Pope Water and Groundwater Using the Phreeqe Code

Published online by Cambridge University Press:  26 February 2011

Irene Ijundén  and
Karin Andersson
Irene Ijundén
Affiliation:
Department of Nuclear Chemistry, Chalmers university of Technology, S-412 96 GÖTEBORG, SWEDEN
Karin Andersson
Affiliation:
Lindgren o Andersson HB, Asbacken 28, S-445 00 SURTE, SWEDEN
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Abstract

The equilibria between cement solids and pore water as well as between groundwater and rock/fracture filling minerals have been modeled, using the PHREEQE geochemical code. Additions of mineral phases to the original PHREEQE data base have been necessary for both systems. Comparisons of the predicted saturation state of the different waters with fracture filling mineralogy determined in the same area was performed.

When a satisfactory modeling of the separate cement and rock systems was achieved, a modeling of the mixing of the two waters was performed. The state of saturation with respect to the minerals considered in the initial calculations as well as to potential “new” minerals was evaluated.

The main mineral phases that are predicted to be supersaturated when mixing the waters are in the initial stage calcite, hydroxyapatite, chlorite, and laumontite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 949
Copyright
Copyright © Materials Research Society 1989

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References

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