Extrusion and erosion of bentonite buffer, 3

Matsumoto, Kazuhiro; Fujita, Tomoo 

The extrusion of bentonite buffer is one of the important issues on the physical stability in the geological disposal of the high level radiation waste. In this report, the long-term extrusion experiment of the bentonite buffer material to an imitation crack was carried out, and the behavior was observed. Moreover, in consideration of the evaluation subject of the closing performance of a disposal site, the extrusion experiment with material with a large sand combination rate was carried out.