Abstract
The bentonite barrier is an essential part of a safe
spent fuel repository in granitic bedrock. One of the
most important safety functions of bentonite buffer is to
limit groundwater flow so that all mass transport takes
place by diffusion. In this work a new mathematical model
was developed to define the transport of ions inside the
bentonite, where there are bound interlayer water and
free extra layer water and sorption capability. This
model is tested in a specified geometry and calculated by
two numerical platforms-Numerrin and COMSOL
Multiphysics-and compared to the original TOUGHREACT
model. The model comparison was not a straightforward
task because of different approaches in the model setup.
Therefore, all the equations are written down, and
parameterization is done to create model descriptions
near each other. The developed model adapts easily, and
there are many new ideas to be tested in bridging the gap
between performance assessment and real systems.
Original language | English |
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Pages (from-to) | 169-174 |
Journal | Nuclear Technology |
Volume | 187 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2015 |
MoE publication type | A1 Journal article-refereed |
Keywords
- cation exchange
- modeling
- transport