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Okamoto, Yoshihiro; Nagai, Takayuki; Shiwaku, Hideaki; Kano, Shigeru; Himeno, Haruyuki*; Kobayashi, Hiroshi*; Nakatani, Mikio*
JAEA-Research 2018-013, 18 Pages, 2019/03
JAEA-Research-2018-013.pdf:1.98MB
The chemical state and local structure of some elements in the simulated nuclear waste glass samples (20 batches) prepared by bottom drain test in the full scale mock-up tests using KMOC melter were investigated by synchrotron radiation based X-ray absorption fine structure (XAFS) analysis. As a result of the analysis of cerium element, it was confirmed that the oxidation proceeds gently as the batch advanced. For manganese, iron, and zinc, there was almost no difference between batches, which seemed to be stabilized by getting into the frame structure of the borosilicate glass. There were no elements that seemed to be clearly crystalline except for platinum group elements. Remarkable precipitation was hardly observed in zirconium and molybdenum with the imaging analysis.
Sueoka, Shigeru; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Kohn, B. P.*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*; Shibata, Kenji*
Journal of Geophysical Research; Solid Earth, 122(8), p.6787 - 6810, 2017/08
no abstracts in English
Kunimaru, Takanori; Mikake, Shinichiro; Nishio, Kazuhisa; Tsuruta, Tadahiko; Matsuoka, Toshiyuki; Ishibashi, Masayuki; Sasao, Eiji; Hikima, Ryoichi; Tanno, Takeo; Sanada, Hiroyuki; et al.
JAEA-Review 2013-018, 169 Pages, 2013/09
JAEA-Review-2013-018.pdf:15.71MB
Japan Atomic Energy Agency (JAEA) at Tono Geoscience Center (TGC) is pursuing a geoscientific research and development project namely the Mizunami Underground Research Laboratory (MIU) Project in crystalline rock environment in order to construct scientific and technological basis for geological disposal of High-level Radioactive Waste (HLW). The MIU Project has three overlapping phases: Surface-based Investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III). The MIU Project has been ongoing the Phase II and the Phase III in 2011 fiscal year. This report shows the results of the investigation, construction and collaboration studies in fiscal year 2011, as a part of the Phase II and Phase III based on the MIU Master Plan updated in 2010.
Fe
O
(=Y, Er, Tm, Yb, Lu and In)Yoshii, Kenji; Ikeda, Naoshi*; Nishihata, Yasuo; Maeda, Daisuke*; Fukuyama, Ryota*; Nagata, Tomoko*; Kano, Jun*; Kambe, Takashi*; Horibe, Yoichi*; Mori, Shigeo*
Journal of the Physical Society of Japan, 81(3), p.033704_1 - 033704_4, 2012/03
Times Cited Count：10 Percentile：55.37(Physics, Multidisciplinary)Exchange bias (EB) behavior has been observed for multiferroic FeO (=Y, Er, Tm, Yb, Lu and In). The materials with the small 
ions (=Tm, Yb, Lu and In) exhibit large EB fields (
1 kOe) below 
100-150 K. This property is rooted in a magnetically glassy state, arising from the competition between ferro- and antiferromagnetic domain interactions. In addition, the exchange bias field tends to be more enhanced for smaller ions. Hence, the EB is controlled by the substitution at the -site in this series.
Kano, Shigeru; Kobayashi, Hidekazu; Yamashita, Teruo; Sasage, Kenichi
no journal, ,
no abstracts in English
Nishihara, Kenji; Oigawa, Hiroyuki; Nakayama, Shinichi; Fujiwara, Takeshi; Kobayashi, Hidekazu; Kano, Shigeru; Sasage, Kenichi; Yamashita, Teruo; Ono, Kiyoshi; Shiotani, Hiroki
no journal, ,
The reduction of the storage facility and repository were evaluated for the cases with or without partitioning of Sr-Cs and transmutation of MA in the advanced FBR fuel cycle with the cost estimation for the storage facilities, transporting and repository. As the result, the transmutation of minor actinides is inevitable for the small repository because the heat generation by 
Am is considerable in FBR. The introduction of partitioning, transmutation and long-term storage enable the very compact layout in the repository like TRU wastes such as hulls and end-pieces of the fuel assembly. The cost for the storage and disposal in this case is much smaller than that in other cases, which mitigates the cost increase by the separation process and transmutor.
Kobayashi, Hidekazu; Kano, Shigeru; Yamashita, Teruo
no journal, ,
no abstracts in English
Mn
O, 2Matsumoto, Keisuke*; Hoshiyama, Takuya*; Oishi, Daisuke*; Akahama, Hiroshi*; Yoshii, Kenji; Kano, Jun*; Hanasaki, Noriaki*; Kambe, Takashi*; Ikeda, Naoshi*; Mori, Shigeo*
no journal, ,
We have investigated the physical properties of YbFeMnO, a derivative system of the electronic ferroelectric RFeO (R: rare earths). Electron diffraction measurements showed taht long-range charge ordering of the Fe-3d charges was observed at room temperature for x=0; this ordering is the origin of ferroelectricity. The x=0.1 oxide showed diffuse scattering patterns at room temperature, instead of the charge-ordered pattern. Thus, 5% Mn substitution can collapse the long-range charge ordering. We will also present the correlation between the magnetic/dielectric properties and the crystal structure.
Suzuki, Tatsuya*; Kaneshiki, Toshitaka*; Nomura, Masao*; Fujii, Yasuhiko; Kobayashi, Hidekazu; Kano, Shigeru; Yamashita, Teruo
no journal, ,
no abstracts in English
Kobayashi, Hidekazu; Yamashita, Teruo; Kano, Shigeru
no journal, ,
no abstracts in English
Sueoka, Shigeru; Kohn, B.*; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*
no journal, ,
Thermochronometric methods are used to identify the denudation history of the Akaishi Range, which has been uplifted since the late Pliocene. ZHe grain ages range 21.5-3.0 Ma and systematically younger to the east, implying a westerly tilting uplift of the Akaishi Range. We estimated denudation rates at 1.2-2.2 mm/yr or more in the Akaishi Range. These high denudation rates imply the topography of the Akaishi Range reflects post-uplift factors, e.g., spatial distribution of bedrock uplift rates and various denudation processes, rather than inherited geometry from the pre-uplift topography. Considering younger AFT ages previously reported in the southern part of the Akaishi Range, the Akaishi Range is considered to have had at least two uplifting stages, i.e., uplifting of the northern part since the late Pliocene and uplifting of the southern part since 1 Ma, probably attributable to reverse faulting of ISTL and collision of the Izu block to the south Fossa Magna area, respectively.
Nagai, Takayuki; Nishizawa, Daiji; Inose, Takehiko*; Sato, Seiichi*; Hatakeyama, Kiyoshi*; Seki, Katsumi*; Oyama, Koichi; Kano, Shigeru
no journal, ,
no abstracts in English
Nagai, Takayuki; Okamoto, Yoshihiro; Kano, Shigeru; Nishizawa, Daiji; Seki, Katsumi*; Homma, Masanobu*; Kobayashi, Hiromi*; Ayame, Yasuo
no journal, ,
no abstracts in English
Kano, Shigeru; Kobayashi, Hidekazu; Yokozawa, Takuma; Yamashita, Teruo
no journal, ,
no abstracts in English
Kuboki, Michikatsu; Naito, Masakazu; Sumi, Hirotaka; Nakayama, Jiro; Kano, Shigeru; Niitsuma, Koichi; Kodaka, Akira; Fujiwara, Koji
no journal, ,
no abstracts in English
Sueoka, Shigeru; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Kohn, B.*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*; Shibata, Kenji*
no journal, ,
no abstracts in English
Sueoka, Shigeru; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Kohn, B. P.*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*; Shibata, Kenji*
no journal, ,
no abstracts in English
Matsumura, Tadayuki; Sumi, Hirotaka; Tokoro, Takeshi; Yamauchi, Sho; Sato, Shohei; Kano, Shigeru; Morikawa, Yo
no journal, ,
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