Research on geosphere stability for long-term isolation of radioactive waste; Scientific programme for fiscal years 2010-2014

Umeda, Koji; Ishimaru, Tsuneari ; Yasue, Kenichi; Asamori, Koichi; Yamada, Kunimi; Kokubu, Yoko   ; Hanamuro, Takahiro  ; Tanikawa, Shinichi; Kusano, Tomohiro

The concept of geological disposal of HLW in Japan is based on a multibarrier system which combines a stable geological environment with an engineered barrier system. Potential geological host formations and their surroundings are chosen, in particular, for their long-term stability, taking into account the fact that Japan is located in a tectonically active zone. This report is to outline 5 years plan (fiscal years 2010-2014) of research and development (R&D) for geosphere stability for long-term isolation of the high-level radioactive waste in JAEA. Background of this research are clarified with the necessity and the significance, and the past progresses in this report. The objectives, outline, contents and schedule during the next 5 years are described in detail. In addition, the plan framework is structured into the following categories: (1) Development and systematization of investigation techniques, (2) Development of models for long-term estimation and effective assessment, (3) Development of dating techniques.