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Mizunami Underground Research Laboratory Project; Preparation of geosynthesis data flow diagram (Construction phase)

Hama, Katsuhiro ; Sato, Toshinori  ; Sasao, Eiji   ; Iwatsuki, Teruki  ; Kunimaru, Takanori; Matsuoka, Toshiyuki; Takeuchi, Ryuji  ; Onoe, Hironori ; Mikake, Shinichiro 

JAEA at Tono Geoscience Center is pursuing a geoscientific research and development project namely the Mizunami Underground Research Laboratory (MIU) project in crystalline rock environment to construct scientific and technological basis for geological disposal of High-level Radioactive Waste. The MIU project is planned in three overlapping phases; Surface-based Investigation Phase (Phase I), Construction Phase (Phase II) and Operation Phase (Phase III). Currently, the project is under the Phase II and Phase III. In Phase II, adequacy of geological environment model is evaluated. Applicability and feasibility assessment of various elemental technologies adopted to characterize geological environment in Phase I will be evaluated. Furthermore, from a design, construction and safety assessment point of view, a series of evaluation procedures are organized and Geosynthesis Data Flow Diagram is established. This is the integrated data flow from investigation through modeling and analysis. It proposes the rational combinations of investigation items which make the investigation results reflect the safety assessment and designing. In this sense, Geosynthesis Data Flow Diagram indicates the rational framework, from investigation to modeling and analysis, for achieving individual goals and tasks. This report summarizes the Geosynthesis Data Flow Diagram optimized during Phase II investigation. The Geosynthesis Data Flow Diagram will be revised based on the research progress.

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