Annual report for research on geosphere stability for long-term isolation of radioactive waste in fiscal year 2023
Niwa, Masakazu
; Shimada, Koji
; Sueoka, Shigeru
; Ishihara, Takanori; Hakoiwa, Hiroaki; Asamori, Koichi; Murakami, Osamu
; Fukuda, Shoma
; Ogita, Yasuhiro
; Kagami, Saya
; Yokoyama, Tatsunori
; Ogata, Manabu
; Nakajima, Toru
; Fujita, Natsuko
; Jinno, Satoshi
; Watanabe, Takahiro

This annual report documents the progress of research and development (R&D) in the 2nd 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.