Evaluating Heterogeneity in Mudstones Based on Geologic Processes at Horonobe, Japan

H007 Evaluating heterogeneity in mudstones based on geologic processes at Horonobe Japan - 1 - A. HARA 1 M. UCHIDA 1 1 Japan Nuclear Cycle Development Institute Tokai Works Waste Isolation Research Division 4-33 Muramatsu Tokai-Mura Ibaraki 319-1194 Japan Objectives of this study The lithology of sedimentary rocks varies significantly both vertically and horizontally. Understanding the heterogeneity and the physical properties of sedimentary rocks is important for initial site investigations for high-level radioactive waste (HLW) disposal. However only a few boreholes will be drilled and limited amount of geophysical surveys including seismic surveys will be conducted during the initial site