Annual report for research on geosphere stability for long-term isolation of radioactive waste in fiscal year 2024

Asamori, Koichi; Sueoka, Shigeru   ; Kobayashi, Tomoharu; Nishiyama, Nariaki  ; Tanaka, Kiriha ; Murakami, Osamu  ; Fukuda, Shoma   ; Ogata, Manabu ; Uchida, Mao; Komatsu, Tetsuya  ; Kagami, Saya   ; Yokoyama, Tatsunori   ; Ogita, Yasuhiro  ; Fujita, Natsuko   ; Jinno, Satoshi   ; Minamitani, Fumina; Watanabe, Takahiro   ; Nara, Fumiko   ; Maeta, Yusuke

This annual report documents the progress of research and development (R&D) in the 3rd fiscal year of the JAEA 4th Medium- and Long-term Plan (fiscal years 2022-2028) to provide the scientific base for assessing geosphere stability for long-term isolation of high-level radioactive waste. 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. The current status of R&D activities with previous scientific and technological progress is summarized.