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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.
-P for an advanced reprocessingHoriuchi, Yusuke; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki; Kida, Fukuka*; Arai, Tsuyoshi*
Journal of Radioanalytical and Nuclear Chemistry, 330(1), p.237 - 244, 2021/10
Times Cited Count：11 Percentile：77.39(Chemistry, Analytical)Applicability of tetra2-ehylhexyl diglycolamide (TEHDGA) impregnated adsorbent for minor actinide (MA) recovery from high level liquid waste (HLLW) in extraction chromatography technology was investigated through batch-wise adsorption and column separation experiments. Distribution ratio of representative fission product elements were obtained by the batch-wise experiments, and TEHDGA adsorbent was shown to be preferable to TODGA adsorbent for decontamination of several species. All Ln(III) supplied into the TEHDGA adsorbent packed column was properly eluted from the column, and the applicability of the adsorbent was successfully showed by this study.
Nara, Fumiko; Kida, Fukuka; Ochiai, Shinya*; Watanabe, Takahiro; Matsunaka, Tetsuya*; Hashino, Kotaro*; Yamasaki, Shinichi*; Tsuchiya, Noriyoshi*
no journal, ,
In our current research, we are focusing on using the brackish lake sediments from Lake Kibagata (Komatsu city, Ishikawa prefecture) on the Japan Sea coast to gain information about the past sea-level changes. Contrary to the Pacific side, the study of the past sea level changes on the Japan Sea side is still limited. To clarify the past sea level response to climate-induced water mass changes, either eustatic or due to GIA, understanding the past sea-level changes in relatively enclosed environments, such as the Japan Sea, is essential. Lake Kibagata is located about 5 km inland from the coastline of the Japan Sea and has not undergone large-scale artificial modifications such as land reclamation. The physical properties (CT image, porosity and magnetic susceptibility, which measured by the multi senser core logger at Kochi Core Center under Kochi Core Center Open Facility System) and the geochemical (Br, I, and trace elements measured by XRF) analysis were conducted on the core KB2023. Based on these data, we will present a report on the past sea level changes at the late Holocene that took place along the Japan Sea coast.
Kida, Fukuka*; Nakamura, Fumiya*; Arai, Tsuyoshi*; Matsushima, Ryotatsu; Saito, Yasuo
no journal, ,
no abstracts in English
Kida, Fukuka*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki
no journal, ,
Focusing on the extraction chromatography method using DGA-based and NTA-based extractants for MA recovery process that can be applied to MOX fuel reprocessing, we developed an adsorbent and investigated the separation conditions by column tests.
Emori, Tatsuya; Morita, Keisuke; Ban, Yasutoshi; Sato, Hiromori*; Kida, Fukuka*; Arai, Tsuyoshi*; Sano, Yuichi
no journal, ,
no abstracts in English
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.
Yamada, Raiki; Niwa, Masakazu; Umeda, Koji*; Yagi, Koshi*; Fujiwara, Taisei*; Okada, Ikuo*; Kida, Fukuka
no journal, ,
K-Ar dating and whole-rock geochemical analyses were conducted for six volcanic rock samples from the forearc zone of southern Kyushu, Japan, a part of the Kyushu-Ryukyu arc. In this study, it was revealed that those volcanic rocks are Early Pleistocene andesites formed along the volcanic front in 1.8 to 1.2 Ma. Trace element compositions of The andesites exhibit subduction zone features, while, some samples have high Mg# (
60) and unusually high Y concentration (
50 ppm). These geochemical characteristics suggest that they are derived from basaltic to andesitic magmas generated by different magmatic processes from the northeast Japan arc (e.g., subduction movement of the Philippine Sea plate and/or spreading of the Okinawa trough). Therefore, the present results indicate that geochemical models on magmatism in the northeast Japan arc are not able to be simply adopted to the Kyushu-Ryukyu arc.
Kagami, Saya; Niwa, Masakazu; Yokoyama, Tatsunori; Shimada, Koji; Kida, Fukuka
no journal, ,
Understanding of the fluid-rock interaction in fault gouges is important to evaluate the activity of faults and reactivation of the inactive faults. The fluid-rock interaction in Taiwan Chelungpu fault activated at the Chi-Chi earthquake has been discussed by Ishikawa et al. (2008) based on the elemental distribution in hydrothermal experiments with sediments and trace elements concentrations and isotope ratios of the fault gouges. In this study, we tried to evaluate the fluid-rock interaction in the Gosukebashi Fault of Rokko Granite based on geochemical compositions of the fault gouge in the similar approach with the above. The analyses of chemical compositions and Sr isotopes of the Gosukebashi Fault samples indicated that the fluid-rock interaction in the Gosukebashi Fault was different from that at 350
C seen in Chelungpu fault and the gouge in this study did not interact with hot fluid during past faulting movements. We will carry more detailed chemical composition and isotope analysis to reveal the changes in chemical composition of the gouge caused by fault movement and understand the fluid-rock interaction of the Gosukebashi Fault gouge.
Kida, Fukuka; Ochiai, Shinya*; Watanabe, Takahiro; Matsunaka, Tetsuya*; Hashino, Kotaro*; Yamasaki, Shinichi*; Yamagishi, Hiroyuki*; Tsuchiya, Noriyoshi*; Nara, Fumiko
no journal, ,
To estimate the Holocene sea-level changes, we analyzed bromine and other chemical compositions in a Lake Kibagata sediment core (core length: ~4m) from Hokuriku region, northern central Japan.
Itayama, Yui*; Murakami, Takuma*; Fujita, Natsuko; Kagami, Saya; Kida, Fukuka; Ochiai, Shinya*; Niwa, Masakazu; Katsuta, Nagayoshi*
no journal, ,
Lake Baikal in southeast Siberia is the most sensitive area on Earth which has been responded to changes in solar insolation. In this poster presentation, we report the results of paleoenvironment analyses of the 140 kyrs records after reestablishing the sediment chronology.
Kida, Fukuka; Ochiai, Shinya*; Watanabe, Takahiro; Matsunaka, Tetsuya*; Hashino, Kotaro*; Fujita, Natsuko; Yamasaki, Shinichi*; Tsuchiya, Noriyoshi*; Nara, Fumiko
no journal, ,
A continuous sediment core (KB2023) was obtained from the Lake Kibagata in Hokuriku region, northern central Japan. To estimate the Holocene sea-level changes, radiocarbon dating and water content measurements were performed in this study.
Ishizawa, Kenta*; Akuzawa, Tadashi*; Kida, Fukuka*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki
no journal, ,
no abstracts in English
Nishiyama, Nariaki; Abe, Noriaki; Kida, Fukuka; Nakajima, Toru*
no journal, ,
In this study, in order to constrain the stress field around 60 Ma, we estimate the paleo-stress from the attitude data of the dikes that intrude into the granites in the Misasa area of Tottori Prefecture, which is located in the San-in region where granites from the Late Cretaceous to the Paleogene are widely distributed. The age of the granites distributed in the study area has been reported to be 64-66 Ma by U-Pb dating (Iida et al., 2015). As a result of the survey, a total of 17 dikes penetrating the granite were identified, and rock samples were collected and the orientation of the dikes was measured. The elemental composition of the rock samples collected was clarified by XRF analysis. Based on the rock-type classification of Winchester & Floyd (1977), the elemental composition data obtained was plotted, and it was determined that 15 samples were non-alkaline rock system andesite to basalt, and 2 samples were dacite. For the 15 dikes classified as andesite to basalt, we estimated the paleo-stress using attitude data. As a result, we detected NNE-SSW compressional strike-slip fault-type stress. In a case study of stress in the Tono and Hida regions in the Chubu region from dike orientations, E-W compression or N-S extension stress was estimated from the attitude of the dikes at around 60 Ma (Niimura et al., 1994; Oikawa et al., 2006). In a study of the Yanahara area, which is located about 40 km southeast of the survey area, a maximum horizontal compressive stress axis in the N-S direction was detected in a quartz porphyry dike of about 54 Ma (Masumoto & Wadatsumi, 1983). In order to discuss the spatiotemporal variation of these stresses, it is necessary to expand the data on the attitude of the dikes.
Masumura, Keisuke*; Akuzawa, Tadashi*; Kida, Fukuka*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki
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no abstracts in English
