Representativeness of the crush zone for activity evaluation and attention for practical survey based on length distributions and superposed deformation

Shimada, Koji   ; Terusawa, Shuji

Representativeness of the crush zone for activity evaluation at the Monju site was investigated by means of statistics of length distributions. The length distribution was exponential indicating a coalessence stage of the crush zone development. Thus the choice of the crush zone to be evaluated during our preceded research (2012-2016) was reasonable. We also payed attention for the future systematic and practical survey from the view point of superposed deformation. That is, in our experience, a superposed deformation observed at the weakest portion in the crush zone system, suggesting that the research on the longest crush zone with an attention at the weakest zone preferable for superposed deformation seems to be a practical research procedure.