Experimental simulation of the alkaline disturbed zone around a cementitious radioactive waste repository: numerical modelling and column experiments

1999 ◽  
Vol 157 (1) ◽  
pp. 183-194 ◽  
Author(s):  
K. Bateman ◽  
P. Coombs ◽  
D. J. Noy ◽  
J. M. Pearce ◽  
P. Wetton ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Numerical Modelling ◽  
Experimental Simulation ◽  
Column Experiments ◽  
Radioactive Waste Repository ◽  
Disturbed Zone ◽  
Waste Repository

Numerical Modeling and Column Experiments to Simulate the Alkaline Disturbed Zone Around a Cementitious Radioactive Waste Repository

1997 ◽  
Vol 506 ◽  
Author(s):  
K. Bateman ◽  
P. Coombs ◽  
D. J. Noy ◽  
J. M. Pearce ◽  
P. D. Wetton
Keyword(s):  
Numerical Modeling ◽  
Radioactive Waste ◽  
Predictive Modelling ◽  
Radioactive Waste Disposal ◽  
Column Experiments ◽  
Mineralogical Analysis ◽  
Coupled Models ◽  
Calcium Silicate Hydrates ◽  
Disturbed Zone ◽  
Waste Repository

ABSTRACTIn order to be able to describe the migration of an alkaline plume, coupled chemistry and flow computer models may be employed. A series of laboratory column experiments were conducted to test the capabilities of currently available coupled models to predict product solids and output fluid compositions as a function of time. The predictions did not replicate all the variations of Ca:Si observed during mineralogical analysis, probably due the unavailability of sufficient kinetic and thermodynamic data for the range of calcium silicate hydrates (CSH) phases of interest. However, the predictions do reproduce the variation of Ca:Si ratios with time and distance along the columns. A better understanding of the above processes will lead to greater confidence in predictive modelling of the migration of alkaline plumes away from the cementitious barriers of radioactive waste disposal facilities.

scholarly journals Locating a radioactive waste repository in the ring of fire

Eos ◽  
2004 ◽  
Vol 85 (45) ◽  
pp. 465-471 ◽  
Author(s):  
Mick Apted ◽  
Kelvin Berryman ◽  
Neil Chapman ◽  
Mark Cloos ◽  
Chuck Connor ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Radioactive Waste Repository ◽  
Waste Repository
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