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Watanabe, Takahiro
JAEA-Review 2018-037, p.20 - 22, 2019/03
Accelerator Mass Spectrometry is widely used for radiometric dating of geological samples. Radiocarbon, Beryllium-10 and Aluminum-26 measurements by Accelerator Mass Spectrometry have been developed at the Toki Research Institute of Isotope Geology and Geochronology, Tono Geoscience Center, JAEA. However, improvement in efficiency of sample preparation techniques and ultra-trace analysis are needed for high-time resolution dataset. In this study, we improved preparation method for radiocarbon dating using elemental analyzer (EA) and automated graphitization equipment (AGE3).
Matsui, Hiroya
no journal, ,
This paper is described about the results of collaboration study between Nishimatsu cop. and JAEA to estimate the applicability of high resolution elastic wave velocity measurement for understanding of a groundwater flow. The measurement was carried out in the vicinity of the groundwater recovery test drift in MIU and it continued for about three month from just after starting at the drainage of the test drift. The results suggested that the elastic wave velocity change were measured with groundwater flow due to drainage of the test drift and the high resolution elastic wave velocity measurement can be applicable for understanding of groundwater flow.
Ogawa, Hiroki; Asamori, Koichi
no journal, ,
no abstracts in English
Shimizu, Mayuko; Niwa, Masakazu
no journal, ,
no abstracts in English
Tozawa, Terumasa; Nishimura, Shusaku; Niwa, Masakazu
no journal, ,
no abstracts in English
Iwatsuki, Teruki; Murakami, Hiroaki; Watanabe, Yusuke; Fukuda, Kenji
no journal, ,
We considered the evaluation method of chemical influence of cement material on groundwater when closing tunnel. As a result, it is considered that long-term pH condition around the tunnel can be estimated by thermodynamic analysis of the groundwater flow, the applied cement material, accompanying water chemistry and the amount of alkaline groundwater.
I/
I measurement at the JAEA-AMS-TONOMiyake, Masayasu; Fujita, Natsuko; Okabe, Nobuaki; Kokubu, Yoko; Shimada, Akiomi; Ogata, Nobuhisa
no journal, ,
no abstracts in English
Onoe, Hironori; Matsuoka, Toshiyuki; Niwa, Masakazu; Takeda, Takaaki*
no journal, ,
no abstracts in English
Ozaki, Yusuke; Onoe, Hironori; Iwatsuki, Teruki
no journal, ,
In the Mizunami Underground Research Laboratory, Groundwater REcovery Experiment in Tunnel (GREET) is performed as a part of development of backfilling technologies. In GREET, water pressure, displacement of bedrock, water quality, etc. are monitored in and around the test drift to capture the disturbance and recovery process of geological environment by excavation and closure of the test drift. In addition to in-situ data acquisition, numerical simulation is performed to enhance the understanding of the coupled process. In this study, we demonstrate the results of coupled simulation of excavation of the test drift.
Komatsu, Tetsuya; Takahashi, Takayuki*; Funatsu, Taro*; Muraki, Masahiro*; Hiura, Yuki; Sugai, Toshihiko*
no journal, ,
no abstracts in English
Watanabe, Yusuke; Fukuda, Kenji; Murakami, Hiroaki; Iwatsuki, Teruki; Suzuki, Yohei*
no journal, ,
In this study, microbial incubation experiment was conducted at 300m depth in Mizunami underground research laboratory for the purpose of evaluating the relation between microbial activity and geochemical characteristics in underground environment. In this test, it is necessary to evaluate the microbial activity based on the change in the dissolved component concentration of the groundwater, and it is necessary to grasp the change of the dissolved component due to the exchange of the groundwater in the borehole in advance. Therefore, fluorescent tracer was added to evaluate how the groundwater during the cultivation test spreads into the surrounding rock.
Sasao, Eiji; Ishibashi, Masayuki; Murakami, Hiroaki; Fukuda, Kenji; Itai, Kaori*; Yuguchi, Takashi*
no journal, ,
The authors perform study on mass transport in granitic rock founded by JAEA "Hougakenkyu". In this poster, we report recent progress of our study.
