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Watanabe, Yusuke; Hayashida, Kazuki; Kato, Toshihiro; Kubota, Mitsuru; Aosai, Daisuke*; Kumamoto, Yoshiharu*; Iwatsuki, Teruki
JAEA-Data/Code 2018-002, 108 Pages, 2018/03
JAEA-Data-Code-2018-002.pdf:6.53MB
Japan Atomic Energy Agency has been investigating groundwater chemistry to understand the effect of excavation and maintenance of underground facilities as part of the Mizunami Underground Research Laboratory (MIU) Project in Mizunami, Gifu, Japan. In this report, we compiled data of groundwater chemistry and microbiology obtained at the MIU in the fiscal year 2016 and 2014 to 2016, respectively. In terms of ensuring traceability of data, basic information (e.g. sampling location, sampling time, sampling method and analytical method) and methodology for quality control are described.
Imaizumi, Tomomi; Miyauchi, Masaru; Ito, Masayasu; Watahiki, Shunsuke; Nagata, Hiroshi; Hanakawa, Hiroki; Naka, Michihiro; Kawamata, Kazuo; Yamaura, Takayuki; Ide, Hiroshi; et al.
JAEA-Technology 2011-031, 123 Pages, 2012/01
JAEA-Technology-2011-031.pdf:16.08MB
The number of research reactors in the world is decreasing because of their aging. However, the planning to introduce the nuclear power plants is increasing in Asian countries. In these Asian countries, the key issue is the human resource development for operation and management of nuclear power plants after constructed them, and also the necessity of research reactor, which is used for lifetime extension of LWRs, progress of the science and technology, expansion of industry use, human resources training and so on, is increasing. From above backgrounds, the Neutron Irradiation and Testing Reactor Center began to discuss basic concept of a multipurpose low-power research reactor for education and training, etc. This design study is expected to contribute not only to design tool improvement and human resources development in the Neutron Irradiation and Testing Reactor Center but also to maintain and upgrade the technology on research reactors in nuclear power-related companies. This report treats the activities of the working group from July 2010 to June 2011 on the multipurpose low-power research reactor in the Neutron Irradiation and Testing Reactor Center and nuclear power-related companies.
+ 
Li reactions using the continuum-discretized coupled-channels methodIchinkhorloo, D.*; Matsumoto, Takuma*; Hirabayashi, Yoshiharu*; Kato, Kiyoshi*; Chiba, Satoshi
Journal of Nuclear Science and Technology, 48(11), p.1357 - 1360, 2011/10
Times Cited Count：6 Percentile：46.07(Nuclear Science & Technology)The + Li reactions are important not only from the basic interest of the system but also from the application point of view. In this work, we study Li breakup reactions of incident neutron energies 11.5, 14.1 and 18.0 MeV by applying an 
+ 
cluster model to 
Li and using the continuum-discretized coupled-channels approach. At the present energy, our calculation gives almost good agreement with experimental data.
Li(
)Li
reactions with the microscopic coupled-channels methodMatsumoto, Takuma*; Ichinkhorloo, D.*; Hirabayashi, Yoshiharu*; Kato, Kiyoshi*; Chiba, Satoshi
Physical Review C, 83(6), p.064611_1 - 064611_6, 2011/06
Times Cited Count：21 Percentile：77.29(Physics, Nuclear)We investigate Li()Li
reactions by using the continuum-discretized coupled-channels method with the complex Jeukenne-Lejeune-Mahaux effective nucleon-nucleon interaction. In this study, the Li nucleus is described by a d + cluster model. The calculated elastic cross sections for incident energies between 7.47 and 24.0 MeV are in good agreement with experimental data. Furthermore, we show that the neutron spectra for Li breakup states measured at selected angular points and incident energies can be also reproduced systematically.
Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.
Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05
Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.
Sozawa, Shizuo; Nakagawa, Tetsuya; Omi, Masao; Hayashi, Koji; Iwamatsu, Shigemi; Kawamata, Kazuo; Kato, Yoshiaki; Kanazawa, Yoshiharu
JAEA-Technology 2009-069, 32 Pages, 2010/03
JAEA-Technology-2009-069.pdf:7.33MB
Refurbishment of the Japan Materials Testing Reactor (JMTR), which is recognized as one of important facilities in Japan for safety research, is in progress by the JAEA. In Extensive safety research of light-water reactor (LWR) fuels and materials under a contract with the Nuclear and Industrial Safety Agency of Ministry of Economy, Trade and Industry of Japan, the irradiation tests are planned in order to examine integrity of the LWR fuels and structure materials. For the irradiation tests of high burnup fuels and irradiated materials in the JMTR, modification of the hot laboratory facilities are needed, which are (1) strengthening JMTR hot-lab. cell-shielding, (2) the capsule assembling device, (3) domestic transportation cask, (4) fuel-rod center-hole processing device, (5) master-slave manipulators, (6) power manipulator, and (7) scanning electron microscope.
O meltKato, Tetsuya*; Sakamura, Yoshiharu*; Iwai, Takashi; Arai, Yasuo
Radiochimica Acta, 97(4-5), p.183 - 186, 2009/05
Times Cited Count：3 Percentile：25.18(Chemistry, Inorganic & Nuclear)The solubility of Pu and rare-earths were measured in LiCl-LiO melt where the sesquioxides were precipitated. As shown in the solubility measurement of Pu(III), Nd(III) and Gd(III) at 923 K, the solubility increased proportionally with LiO concentration in the melt. It was also found that the element of larger ionic radius has higher solubility as far as the trivalent rare-earths and Pu.
2 surfaces by O 1s photoemission spectroscopy using synchrotron radiationSuemitsu, Maki*; Kato, Atsushi*; Togashi, Hideaki*; Konno, Atsushi*; Yamamoto, Yoshihisa*; Teraoka, Yuden; Yoshigoe, Akitaka; Narita, Yuzuru*; Enta, Yoshiharu*
Japanese Journal of Applied Physics, Part 1, 46(4B), p.1888 - 1890, 2007/04
Times Cited Count：12 Percentile：45.36(Physics, Applied)Initial oxidation of Si(110) surface has been investigated by using real-time X-ray photoemission spectroscopy. The time evolution of the O 1s spectrum shows occurrence of rapid oxidation just after the introduction of the oxygen molecules, which is evidenced by the considerable peak intensity corresponding to oxygen exposure of as low as 1.5L (1L=1.3310
Pa s). This initial oxide is dominated by a state with a relatively low binding energy, which is gradually replaced by a state with a relatively high binding energy with the increase of the oxygen exposure, resulting in the low-KE shift of the O 1s peak. Comparison with previously reported O 1s spectra from dry-oxidized Si(111) surface suggests oxidation at or around the adatoms of Si(110)-162 clean surface as a likely oxidation state for this low-binding-energy peak.
2 surface by photoemission spectroscopySuemitsu, Maki*; Kato, Atsushi*; Togashi, Hideaki*; Konno, Atsushi*; Yamamoto, Yoshihisa*; Teraoka, Yuden; Yoshigoe, Akitaka; Enta, Yoshiharu*; Narita, Yuzuru*
ECS Transactions, 3(2), p.311 - 316, 2006/00
Initial thermal oxidation of Si(110) surface has been investigated by using real-time X-ray photoemission spectroscopy with synchrotron radiation. The Si(110) initial oxidation is characterized by presence of a rapid oxidation just after the introduction of gaseous oxygen molecules. Peak separation of the O1s photoemission spectra suggests the presence of at least two distinct oxidation sites on the surface, which may reflect the complicated surface structure of the Si(110)-162 reconstruction.
Makino, Takayoshi; Okita, Takatoshi; Kato, Yoshiyuki; Kurita, Tsutomu; Takahashi, Yoshiharu; Aono, Shigenori
Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 5 Pages, 2005/10
A simplified MOX pellet fabrication process, called short process, has been developed to drastically reduce fuel fabrication cost.The MH powder has characteristic of fine particle and low flowability. It is difficult to pelletize the MH powder directly without granulation into smaller size FR pellet compared with LWR fuel. Therefore, small-scale hot tests to improve the flowability of the MH powder has been carried out using two kinds of methods, and quality of the pellet was evaluated.
Kimura, Takaumi; Nagaishi, Ryuji; Kato, Yoshiharu; Yoshida, Zenko
Journal of Alloys and Compounds, 323-324(1-4), p.164 - 168, 2001/07
Times Cited Count：49 Percentile：87.8(Chemistry, Physical)no abstracts in English
Kimura, Takaumi; Nagaishi, Ryuji; Kato, Yoshiharu; Yoshida, Zenko
Radiochimica Acta, 89(3), p.125 - 130, 2001/05
Times Cited Count：64 Percentile：96.79(Chemistry, Inorganic & Nuclear)no abstracts in English
Takahashi, Yoshio*; Kimura, Takaumi; Kato, Yoshiharu; Minai, Yoshitaka*
Environmental Science & Technology, 33(22), p.4016 - 4021, 1999/00
Times Cited Count：45 Percentile：74.67(Engineering, Environmental)no abstracts in English
Takahashi, Yoshio*; Kimura, Takaumi; Kato, Yoshiharu; *; *; *
Journal of Radioanalytical and Nuclear Chemistry, 239(2), p.335 - 340, 1999/00
Times Cited Count：15 Percentile：72.74(Chemistry, Analytical)no abstracts in English
Kimura, Takaumi; Kato, Yoshiharu; Takeishi, Hideyo; Takahashi, Yoshio*; Minai, Yoshitaka*; Choppin, G. R.*
Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.61 - 81, 1999/00
no abstracts in English
Meinrath, G.; Kimura, Takaumi; Kato, Yoshiharu; Yoshida, Zenko; Lis, S.*
Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.347 - 354, 1999/00
no abstracts in English
G.Meinrath*; Kato, Yoshiharu; Kimura, Takaumi; Yoshida, Zenko
Radiochimica Acta, 84(1), p.21 - 29, 1999/00
no abstracts in English
Kimura, Takaumi; Kato, Yoshiharu
Journal of Alloys and Compounds, 275-277, p.806 - 810, 1998/00
Times Cited Count：104 Percentile：96.56(Chemistry, Physical)no abstracts in English
Kimura, Takaumi; Kato, Yoshiharu
Journal of Alloys and Compounds, 278, p.92 - 97, 1998/00
Times Cited Count：67 Percentile：92.86(Chemistry, Physical)no abstracts in English
Kimura, Takaumi; Kato, Yoshiharu; Takeishi, Hideyo; G.R.Choppin*
Journal of Alloys and Compounds, 271-273, p.719 - 722, 1998/00
Times Cited Count：46 Percentile：88.55(Chemistry, Physical)no abstracts in English
