Development of a model for evaluating mechanical effects of crustal movements on the disposal system in Japan (Contract research)

Nagasawa, Hirokazu; Takeda, Seiji ; Kimura, Hideo

In the safety assessment of geological disposal for high level radioactive wastes, it is important to develop the modelling for evaluating mechanical effects of crustal movements on the disposal system in Japan. In this study, the model on crustal movements is represented by accumulating two components of velocity magnitude of the crust to horizontal direction, caused by transient movements associated with fault and/or volcanic activities and ordinary movements with the other continuous factors. In this report, we provide the specification of the model on crustal movement and analyze the horizontal velocity in Tohoku region using the model. The results indicate that the spatial distribution of longitudinal velocities in Tohoku region is similar to that of the ordinary movements.