The Measurement of density distribution of bentonite buffer extruded into fractures by using X-ray CT scanner

Matsumoto, Kazuhiro*; Tanai, Kenji 

For the geological disposal of the high-level radioactive waste, it is important to develop the model to evaluate the long-term stability of the engineered barrier system. The increase in the reliability of the evaluation model may reduce the uncertainty of the safety assessment. In this study, the density distribution of the bentonite buffer extruded into the artificial fractures was measured by using a X-ray CT scanner to promote understanding of the extrusion phenomenon of the bentonite into fractures.