Fault Length Distribution of the Bedrock at the Site of Monju Fast-Breeder Reactor

Abstract

Fault population has different statistical properties depending on its maturity. Younger group shows power law fault length distribution. On the other hand, mature group shows exponential fault length distribution. In this study, we conducted statistical analysis on the length distributions of crush zones in the bedrock at the site of the Monju fast-breeder reactor. As a result it was suggested that （1） the length distribution of the crush zones shows exponential distribution, （2） NE-direction crush zones are probably more mature than NNE- direction ones. In order to improve the applicability of the method presented in this paper, accumulation of more case studies is desired under various geological settings and spatio-temporal scales.