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Takeda, Tetsuaki*; Inagaki, Yoshiyuki; Aihara, Jun; Aoki, Takeshi; Fujiwara, Yusuke; Fukaya, Yuji; Goto, Minoru; Ho, H. Q.; Iigaki, Kazuhiko; Imai, Yoshiyuki; et al.
High Temperature Gas-Cooled Reactors; JSME Series in Thermal and Nuclear Power Generation, Vol.5, 464 Pages, 2021/02
As a general overview of the research and development of a High Temperature Gas-cooled Reactor (HTGR) in JAEA, this book describes the achievements by the High Temperature Engineering Test Reactor (HTTR) on the designs, key component technologies such as fuel, reactor internals, high temperature components, etc., and operational experience such as rise-to-power tests, high temperature operation at 950
C, safety demonstration tests, etc. In addition, based on the knowledge of the HTTR, the development of designs and component technologies such as high performance fuel, helium gas turbine and hydrogen production by IS process for commercial HTGRs are described. These results are very useful for the future development of HTGRs. This book is published as one of a series of technical books on fossil fuel and nuclear energy systems by the Power Energy Systems Division of the Japan Society of Mechanical Engineers.
Inagaki, Daisuke*; Tsusaka, Kimikazu*; Aoyagi, Kazuhei; Nago, Makito*; Ijiri, Yuji*; Shigehiro, Michiko*
Proceedings of ITA-AITES World Tunnel Congress 2015 (WTC 2015)/41st General Assembly, 10 Pages, 2015/05
Tsusaka, Kimikazu*; Inagaki, Daisuke*; Nago, Makito*; Ijiri, Yuji*
Proceedings of 8th Asian Rock Mechanics Symposium (ARMS-8) (USB Flash Drive), 9 Pages, 2014/10
La
Pb
Kawae, Tatsuya*; Koga, Mikito*; Sato, Yoshiaki*; Makiyama, Shun*; Inagaki, Yuji*; Tateiwa, Naoyuki; Fujiwara, Tetsuya*; Suzuki, Hiroyuki*; Kitai, Tetsuo*
JPS Conference Proceedings (Internet), 3, p.012030_1 - 012030_6, 2014/06
We measure the temperature dependence of the nonlinear susceptibility 
in PrLaPb. reflects the fluctuation of the quadrupolar moments. Non-Fermi liquid behavior of with 
-dependence is detected below 2.5 K, suggesting that the screening of the quadrupolar moments is responsible for the anomalous behavior at low temperatures. These results provide a direct evidence for the crucial role of the quadrupolar moments in PrLaPb.
non-Kramers doublet system PrLaPb
Kawae, Tatsuya*; Koga, Mikito*; Sato, Yoshiaki*; Makiyama, Shun*; Inagaki, Yuji*; Tateiwa, Naoyuki; Fujiwara, Tetsuya*; Suzuki, Hiroyuki*; Kitai, Tetsuo*
Journal of the Physical Society of Japan, 82(7), p.073701_1 - 073701_4, 2013/07
Times Cited Count：10 Percentile：55.98(Physics, Multidisciplinary)We measure the temperature dependence of the nonlinear susceptibility , which reflects the fluctuation of quadrupolar moments in, PrLaPb which a non-Kramers doublet in the crystal-electric-field ground state to provide evidence of the quadrupolar Kondo effect. Non-Fermi liquid behavior of with a - ln 
dependence is detected in the [100] and [110] directions below 
2.5 K, suggesting the screening of quadrupolar moments. In contrast, in the [111] direction becomes constant below 3 K. The observed features indicate that a low-lying doublet plays a crucial role in the anomalous properties of Pr
La
Pb.
Tsusaka, Kimikazu; Tokiwa, Tetsuya; Inagaki, Daisuke; Hatsuyama, Yoshihiro*; Koike, Masashi*; Ijiri, Yuji*
Doboku Gakkai Rombunshu, F1 (Tonneru Kogaku) (Internet), 68(2), p.40 - 54, 2012/09
Japan Atomic Energy Agency has excavating three deep shafts through soft sedimentary rock at Horonobe Underground Research Laboratory. In this paper, the author discussed rock mass behaviour induced by the 6.5 m diameter shaft sinking. They conducted geological mapping in an excavation face and boreholes digged around the shaft wall, field measurements such as convergence measurements and monitoring of rock displacements using multi-interval borehole extensometers around a shaft at around 160 m and 220 m in depths, and three-dimensional numerical analysis which models the shaft excavation procedure such as timing of installation of support elements and setting and removal of a concrete form. As a result, it was clarified that remarkablely large compressive strains occurred within about 1 m into the shaft wall since the rock mass behaviour was controlled by the concrete lining and that the behaviour would predominantly be induced by the fractures closing which opened significantly and propagated during excavation steps before the installation of a concrete lining and the directions where the strains occurred heavily depended on the fracture orientation around the shaft.
Tsusaka, Kimikazu; Inagaki, Daisuke; Hatsuyama, Yoshihiro*; Koike, Masashi*; Shimada, Tomohiro*; Ijiri, Yuji*
Doboku Gakkai Rombunshu, F1 (Tonneru Kogaku) (Internet), 68(1), p.7 - 20, 2012/05
Japan Atomic Energy Agency has excavating three deep shafts through soft sedimentary rock at Horonobe Underground Research Laboratory. In this paper, the author discussed change in stress and the stress distribution in a concrete lining and steel arch sets induced by the 6.5 m diameter shaft sinking. They conducted not only field measurements of stress in support elements at around 220 m in depth but also three-dimensional numerical analysis which models the shaft excavation procedure such as timing of installation of support elements and setting and removal of a concrete form. As a result, it was clarified that more than 10 MPa difference in circumferential stress occurred in a 2 m high and 400 mm thick concrete lining due to anisotropy of initial stress and three-dimensional effect of an excavation face. It was also found that a concrete lining gradually deformed from an original cylindrical form to an "oval salad bowl" form with the long axis pallarel to the direction of the minimum horizontal principal stress after a concrete form was removed.
Tsusaka, Kimikazu; Inagaki, Daisuke; Koike, Masashi*; Ijiri, Yuji*; Hatsuyama, Yoshihiro*
Harmonising Rock Engineering and the Environment, p.305 - 308, 2011/10
In this paper, the authors discussed circumferential stress distribution in a concrete lining and displacement of rock around shaft wall induced by shaft excavation at Horonobe Underground Research Laboratory. Field measurements of the lining stress and rock displacement were conducted between 218 m and 220 m in depths during excavation of a 6.5 m diameter access shaft and the results were analyzed using a three-dimensional numerical model. As a result, it was found that the maximum and minimum stresses occurred in the direction of horizontal minimum and maximum initial stresses, respectively. It was also clarified that difference in the stress between the maximum and minimum values was beyond 10 MPa. In addition, it was found that compressive axial strain occurred around a shaft wall after casting concrete lining since rock behavior in the vicinity of shaft wall was controlled by a concrete lining.
Inagaki, Daisuke; Tsusaka, Kimikazu; Ijiri, Yuji*; Koike, Masashi*; Hatsuyama, Yoshihiro*
Dai-40-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koen Rombunshu (CD-ROM), 6 Pages, 2011/01
no abstracts in English
Tsusaka, Kimikazu; Inagaki, Daisuke; Koike, Masashi*; Ijiri, Yuji*; Hatsuyama, Yoshihiro*
Dai-40-Kai Gamban Rikigaku Ni Kansuru Shimpojiumu Koen Rombunshu (CD-ROM), p.7 - 12, 2011/01
no abstracts in English
Itazu, Toru; Inagaki, Manabu; Kato, Tomoko; Suzuki, Yuji*; Oyamada, Kiyoshi*; Ebashi, Takeshi; Kawamura, Makoto; Ebina, Takanori*; Miyahara, Kaname
JAEA-Review 2009-015, 59 Pages, 2009/07
JAEA-Review-2009-015.pdf:10.84MB
The project of high-level radioactive waste disposal is in the stage of site selection in Japan, and the site-specific performance assessment using the methodology of site-generic study has been developed after the publication of the second progress report (H12). In the same way, biosphere assessment using the behavior of radionuclides, which depends on the site-specific condition, has been started. In this paper, the following issues have been addressed. (1) Survey of the foreign literature relating to the surface and near- surface hydrology for biosphere assessments. (2) Survey of the domestic literature of flow and transport in subsurface systems valuable for biosphere assessments. (3) Trial of transport analysis in surface and near-surface environment of the model site. (4) The setting and boundary conditions of model used for the surface and near-surface hydrological analysis. About the fist issue, from literature of Sweden, we studied the calculation of the dose with account to radionuclides migration in the Quaternary. Concerning the second item, collecting and compiling the useful information for the surface and near-surface hydrological analysis from literature related to groundwater flow and pollution survey in Japan, we learned about the environmental tracer method and so on. Concerning the third point, transport analysis in surface and near-surface environment using site-specific data for sensitivity analysis after this has been carried out to check out the influence of some parameters on transport phenomena, and the relative high sensitivity of the difference of the source positions were shown. Concerning the fourth item, we examined the setting and the boundary conditions of model whose outputs include groundwater flow and transport rate into river, lake, sea. These outputs are used as inputs of biosphere assessment model.
Inagaki, Manabu; Kato, Tomoko; Yoshida, Hideji*; Oyamada, Kiyoshi*; Fukaya, Yukiko*; Suzuki, Yuji*; Oi, Takao
JAEA-Research 2007-029, 81 Pages, 2007/03
JAEA-Research-2007-029.pdf:10.88MB
The project of high-level radioactive waste disposal is in activity for the site selection of HLW disposal facility and the performance assessment should be more site-specific rather than site-generic, where the applicability of the achievement of site-generic study such as second progress report (H12) to the site specific is to be clarified. In the same way, it is necessary for biosphere assessment to incorporate the site specific condition to the model. The exposure pathway or concentration of the radio nuclides should be determined according to the site specific geological condition, for example. In this paper, following topics have been selected to start the study to reflect specific geological condition to the biosphere modeling. (1) The literature survey of international and national approaches and issues relating to the treatment of GBIs within biosphere assessments, (2) To develop methodology to estimate the release point of the deep groundwater to the shallow accessible groundwater. (3) To prepare information to estimate water balance this is, in turn, necessary to assess the dilution and/or dispersion of the radionuclides in the shallow accessible groundwater body.
Takase, Hiroyasu*; Metcalfe, R.*; Inagaki, Manabu*; Noguchi, Toshihide*; Aoyama, Yuji*; Takase, Kyoko*; Tabara, Michiko*
JNC TJ5400 2003-006, 264 Pages, 2004/02
JNC-TJ5400-2003-006(errata).pdf:0.08MBJNC-TJ5400-2003-006-1.pdf:83.88MBJNC-TJ5400-2003-006-2.pdf:15.97MB
none
Kato, Tomoko; Suzuki, Yuji*; Tagami, Keiko*; Ishikawa, Nao*; Uchida, Shigeo*; Inagaki, Manabu; Miyahara, Kaname
no journal, ,
To select and to presume the parameters adaptable to biosphere assessment of geological disposal at an actual environment, the procedure of updating a database using the domestic biosphere data was developed and was tried to a part of element-specific parameters. As a result, we were able to set the reliable biosphere parameters, by arranging important background information to secure the reliability of the parameter.
Hayashi, Takumi; Nakamura, Hirofumi; Isobe, Kanetsugu; Kobayashi, Kazuhiro; Yamanishi, Toshihiko; Inagaki, Yuji*; Oya, Yasuhisa*; Okuno, Kenji*
no journal, ,
no abstracts in English
Itazu, Toru; Kato, Tomoko; Inagaki, Manabu; Suzuki, Yuji*
no journal, ,
The project of high-level radioactive waste disposal is in the stage of site selection in Japan, and the site-specific performance assessment using the methodology of site-generic study has been developed after the publication of the second progress report (H12). Japan Atomic Energy Agency (JAEA) has started the biosphere assessment using the behavior of radionuclides, which depends on the site-specific geological condition. In this presentation, we report the examination of biosphere assessment methodology in view of surface and near-surface environment.
Itazu, Toru; Kato, Tomoko; Inagaki, Manabu; Maekawa, Keisuke; Suzuki, Yuji*; Oyamada, Kiyoshi*
no journal, ,
On the performance assessment of HLW Geological Disposal, we must evaluate the human impact of radionuclides delivered to the ground surface by groundwater flow, which evaluation requires the setting of pathways of the radionuclides and the estimation of dilution effect. In this presentation, for development of methodology for biosphere assessment modeling including the dilution effect with the site-specific information in the stage of site selection, we show the examination of the methodology through trial of groundwater flow analysis in surface and near-surface environment of Horonobe by using existing literature.
Koike, Masashi*; Ijiri, Yuji*; Inagaki, Daisuke; Tsusaka, Kimikazu
no journal, ,
no abstracts in English
Inagaki, Daisuke; Tsusaka, Kimikazu; Miura, Yoichi*; Nago, Makito*; Shindo, Akihisa*; Ijiri, Yuji*; Koike, Masashi*; Hatakenaka, Chino*
no journal, ,
no abstracts in English
Inagaki, Daisuke; Ijiri, Yuji*; Nago, Makito*; Hatsuyama, Yoshihiro*; Sato, Masaru*; Kunimaru, Takanori*
no journal, ,
no abstracts in English
Inagaki, Daisuke; Tsusaka, Kimikazu; Aoyagi, Kazuhei; Hagihara, Takeshi*; Nago, Makito*; Minamide, Masashi*; Ijiri, Yuji*
no journal, ,
no abstracts in English
