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Fujita, Natsuko; Maeta, Yusuke; Miyake, Masayasu*; Matsubara, Akihiro*; Uno, Sadanori*; Omae, Akiomi*; Jinno, Satoshi; Minamitani, Fumina; Watanabe, Takahiro; Nishio, Tomohiro; et al.
Dai-37-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.22 - 25, 2026/03
no abstracts in English
Asamori, Koichi; Sueoka, Shigeru; Komatsu, Tetsuya; Ogata, Manabu; Uchida, Mao; Nishiyama, Nariaki; Tanaka, Kiriha; Kobayashi, Tomoharu; Mitsuguchi, Takehiro; Murakami, Osamu; et al.
JAEA-Review 2025-035, 29 Pages, 2025/10
JAEA-Review-2025-035.pdf:1.12MB
This report is a plan of research and development (R&D) on geosphere stability for long-term isolation of high-level radioactive waste (HLW) in Japan Atomic Energy Agency (JAEA), in fiscal year 2025. The objectives and contents of this research are described in detail based on the JAEA 4th Medium- and Long-term Plan (fiscal years 2022-2028). In addition, the background of this research is described from the necessity and the significance for site investigation and safety assessment, and the past progress. 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.
Asamori, Koichi; Sueoka, Shigeru; Kobayashi, Tomoharu; Nishiyama, Nariaki; Tanaka, Kiriha; Murakami, Osamu; Fukuda, Shoma; Ogata, Manabu; Uchida, Mao; Komatsu, Tetsuya; et al.
JAEA-Research 2025-007, 99 Pages, 2025/10
JAEA-Research-2025-007.pdf:12.36MB
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.
Minamitani, Fumina; Nishio, Tomohiro*; Fujita, Natsuko; Maeta, Yusuke; Miyake, Masayasu; Matsubara, Akihiro*; Uno, Sadanori*; Omae, Akiomi*; Jinno, Satoshi; Watanabe, Takahiro
Dai-25-Kai AMS Shimpojiumu Hokokushu (Internet), 4 Pages, 2025/00
no abstracts in English
Niwa, Masakazu; Shimada, Akiomi; Asamori, Koichi; Sueoka, Shigeru; Komatsu, Tetsuya; Nakajima, Toru; Ogata, Manabu; Uchida, Mao; Nishiyama, Nariaki; Tanaka, Kiriha; et al.
JAEA-Review 2024-035, 29 Pages, 2024/09
JAEA-Review-2024-035.pdf:1.24MB
This report is a plan of research and development (R&D) on geosphere stability for long-term isolation of high-level radioactive waste (HLW) in Japan Atomic Energy Agency (JAEA), in fiscal year 2024. The objectives and contents of this research are described in detail based on the JAEA 4th Medium- and Long-term Plan (fiscal years 2022-2028). In addition, the background of this research is described from the necessity and the significance for site investigation and safety assessment, and the past progress. 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.
Minamitani, Fumina; Fujita, Natsuko; Jinno, Satoshi; Nishio, Tomohiro*; Watanabe, Takahiro
no journal, ,
no abstracts in English
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina
no journal, ,
We will develop a radiocarbon dating method that uses an exhaust gas filter to remove hydrocarbons without using an accelerator. In this study, we investigate the efficiency of hydrocarbon dissociation in carbon dioxide using an exhaust gas filter.
Minamitani, Fumina; Fujita, Natsuko; Jinno, Satoshi; Yoneda, Minoru*
no journal, ,
no abstracts in English
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina; Maeta, Yusuke; Miyake, Masayasu*; Matsubara, Akihiro*; Nishio, Tomohiro; Ogawa, Yumi*; Kitano, Toshihiko*; Watanabe, Takahiro
no journal, ,
The JAEA-AMS-TONO facility at the Tono Geoscience Center, JAEA has three accelerator mass spectrometers. We report the present status of the JAEA-AMS-TONO.
Minamitani, Fumina; Fujita, Natsuko; Jinno, Satoshi; Omori, Takayuki*; Hakozaki, Masataka*; Yoneda, Minoru*
no journal, ,
Radiocarbon measurements using accelerator mass spectrometers play an important role in dating geological samples. In this research, by applying the laser ablation-radiocarbon measurement system to natural samples and accumulating practical examples, we aim to develop a rapid dating method and miniaturize the entire accelerator mass spectrometry system, including the preparating device. As an application to natural samples, we will first report test measurement results for tree rings, which have been extensively studied.
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina; Maeta, Yusuke; Miyake, Masayasu*; Matsubara, Akihiro*; Nishio, Tomohiro; Kitano, Toshihiko*; Watanabe, Takahiro
no journal, ,
The Tono Geoscience Center has begun to study gas ion source conversion using a method that is expected to significantly reduce work time and expand the range of applications.
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina
no journal, ,
We will develop a radiocarbon dating method that uses an exhaust gas filter to remove hydrocarbons without using an accelerator. In this study, we investigate the efficiency of hydrocarbon dissociation in carbon dioxide using an exhaust gas filter.
Maeta, Yusuke; Fujita, Natsuko; Miyake, Masayasu; Matsubara, Akihiro*; Uno, Sadanori*; Omae, Akiomi*; Jinno, Satoshi; Minamitani, Fumina; Watanabe, Takahiro; Nishio, Tomohiro*; et al.
no journal, ,
The JAEA-AMS-TONO facility at the Tono Geoscience Center, JAEA has three accelerator mass spectrometers. We report the present status of the JAEA-AMS-TONO.
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina
no journal, ,
We will develop a radiocarbon dating method that uses the platinum to remove hydrocarbons without using an accelerator. In this study, we investigate the interaction between the sample gas and platinum to deter-mine the dissociation efficiency of hydrocar-bons in the gas.
Fujita, Natsuko; Jinno, Satoshi; Minamitani, Fumina; Miyake, Masayasu; Matsubara, Akihiro*; Maeta, Yusuke; Kida, Fukuka; Ogawa, Yumi; Nishio, Tomohiro*; Omae, Akiomi*; et al.
no journal, ,
The JAEA-AMS-TONO facility at the Tono Geoscience Center, JAEA has three accelerator mass spectrometers. We report the present status of the JAEA-AMS-TONO.