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Xu, P. G.; Zhang, S.-Y.*; Harjo, S.; Vogel, S. C.*; Tomota, Yo*
Quantum Beam Science (Internet), 8(1), p.7_1 - 7_13, 2024/01
and Zr at precisely controlled high temperaturesShirasu, Noriko; Sato, Takumi; Suzuki, Akihiro*; Nagae, Yuji; Kurata, Masaki
Journal of Nuclear Science and Technology, 60(6), p.697 - 714, 2023/06
Times Cited Count：1 Percentile：72.91(Nuclear Science & Technology)Interaction tests between UO and Zr were performed at precisely controlled high temperatures between 1840 and 2000 
C to understand the interaction mechanism in detail. A Zr rod was inserted in a UO crucible and then heat-treated at a fixed temperature in Ar-gas flow for 10 min. After heating in the range of 1890 to 1930 C, the Zr rod was deformed to a round shape, in which the post-analysis detected the significant diffusion of U into the Zr region and the formation of a dominant 
-Zr(O) matrix and a small amount of U-Zr-O precipitates. The abrupt progress of liquefaction was observed in the sample heated at around 1940 C or higher. The higher oxygen concentration in the -Zr(O) matrix suppressed the liquefaction progress, due to the variation in the equilibrium state. The U-Zr-O melt formation progressed by the selective dissolution of Zr from the matrix, and the selective diffusion of U could occur via the U-Zr-O melt.
Watanabe, Jin*; Araki, Yasufumi; Kobayashi, Koji*; Ozawa, Akihiro*; Nomura, Kentaro*
Journal of the Physical Society of Japan, 91(8), p.083702_1 - 083702_5, 2022/08
Times Cited Count：4 Percentile：58.88(Physics, Multidisciplinary)We investigate magnetic orderings on kagome lattice numerically from the tight-binding Hamiltonian of electrons, governed by the filling factor and spin-orbit coupling (SOC) of electrons. We find that even a simple kagome lattice model can host both ferromagnetic and noncollinear antiferromagnetic orderings depending on the electron filling, reflecting gap structures in the Dirac and flat bands characteristic to the kagome lattice. Kane-Mele- or Rashba-type SOC tends to stabilize noncollinear orderings, such a magnetic spirals and 120-degree antiferromagnetic orderings, due to the effective Dzyaloshinskii-Moriya interaction from SOC. The obtained phase structure helps qualitative understanding of magnetic orderings in various kagome-layered materials with Weyl or Dirac electrons.
Shimada, Koji
Chishitsu Gijutsu, (9), p.25 - 40, 2019/09
Today many collaborations are there in Earth-scientific research and development. Structural geology can serve crucial information on tectonic strain at sampling point in Japan, belonging to the circum-Pacific orogenic belt. Visualize of strain estimation would be effective during field geological survey and for better understanding for non-specialist on structural geology. Illustrations decoding mathematical expressions of strain estimation methods are presented here.
Shirasu, Noriko; Suzuki, Akihiro*; Nagae, Yuji; Kurata, Masaki
Proceedings of International Topical Workshop on Fukushima Decommissioning Research (FDR 2019) (Internet), 4 Pages, 2019/05
High temperature interaction tests between UO and Zr were performed at around 2173 K, to make clear the UO/ -Zr(O) interaction and the mechanism of degradation, for developing the improved models for advanced severe accident analysis codes. A Zr plate was inserted in a UO crucible, and heat treated at 2173 K in stream of Ar. After the heat-treatment, the samples were subjected to surface microanalysis. The middle region of Zr sample shows streak-like structures which are extended towered the top. It is confirmed that the streak-like structures were mainly consist of U from the EDX results, and the structures revealed that the U-rich phase was liquid during the heat-treatment. It seems that the U-rich liquid grew selectively toward the area where the oxygen concentration was low.
Nozawa, Takashi
Senmon Toshokan, (295), p.18 - 19, 2019/05
no abstracts in English
Kumazaki, Yui
Joho No Kagaku to Gijutsu, 68(3), P. 141, 2018/03
This paper is a book review of "Basic Guide to Electronic Journals Management" (written by Mutsumi Hosaka). Summary as well as key points of the book is described.
Kurata, Masaki; Barrachin, M.*; Haste, T.*; Steinbrueck, M.*
Journal of Nuclear Materials, 500, p.119 - 140, 2018/03
Times Cited Count：29 Percentile：66.35(Materials Science, Multidisciplinary)Severe accidents occurred at the Fukushima-Daiichi Nuclear Power Station (FDNPS) required an immediate re-examination of fuel degradation phenomenology. The present paper reviews the updated knowledge on the phenomenology of the fuel degradation, focusing mainly on the BWR fuel assembly degradation at the macroscopic scale and that of the individual interactions at the meso-scale. Oxidation of boron carbide (B
C) control rods potentially generate far larger amounts of heat and hydrogen under BWR accident conditions. All integral tests with BC control rods or control blades have shown early failure, liquefaction, relocation and oxidation of BC starting at temperatures around 1250C, well below the significant interaction temperatures of UO-Zry. These interactions or reactions potentially influence the progress of fuel degradation in the early phase. The steam-starved conditions, which are being discussed as a likely scenario at the FDNPS accident, highly influence the individual interactions and potentially lead the fuel degradation in non-prototypical directions. The detailed phenomenology of individual interactions and their influence on the transient and on the late phase of the severe accidents are also discussed.
Sakai, Toshihiro; Matsuoka, Toshiyuki
JAEA-Research 2015-004, 109 Pages, 2015/06
JAEA-Research-2015-004.pdf:141.42MB
JAEA-Research-2015-004-appendix(CD-ROM).zip:128.66MB
We update the geologic map and the database of the geological mapping published by Funaki et al. (2005a) and Ota et al. (2007) based on geological survey and topographical analysis data in and around the Horonobe area. There are many geological survey data which are derived from natural resources (petroleum, natural gas and coal, etc.) exploration in and around Horonobe-cho. We also use these data in addition to data in Funaki et al. (2005a) and Ota et al. (2007)'s data. As results of this report, we also construct a digital geologic map and a digital database of geological survey using GIS. These results can be expected to improve the precision of modeling and analyzing of geological environment, and its long-term evaluation.
Ikeda, Kiyoshi; Gonda, Mayuki; Nagaya, Shun; Hayakawa, Misa; Kunii, Katsuhiko; Mineo, Yukinobu; Yonezawa, Minoru; Itabashi, Keizo
Proceedings of 16th International Conference on Grey Literature (GL-16), p.139 - 145, 2015/03
The Japan Atomic Energy Agency (JAEA) Library has collected Internet information related the Fukushima Accident. We previously reported the development of the Fukushima Accident Archive using the DSpace in 15th International Conference on Grey Literature. We have encountered a new challenging issue grey literature. In many cases, Internet information contains valuable numerical data. However, it is difficult to identify the existence of numerical data in the Internet sites because numerical data is not often organized in a systematic manner on the web sites. We considered such method as to identify numerical data and attempted to introduce "data flagging" system, which was previously used in the International Atomic Energy Agency's International Nuclear Information System (INIS). In this presentation, we will introduce our "data flagging" system for numerical data on the Internet and how we apply the system to our Fukushima Accident Archive.
Honda, Fuminori; Metoki, Naoto; Kaneko, Koji; Jonen, Shintaro; Yamamoto, Etsuji; Aoki, Dai*; Shiokawa, Yoshinobu*; Shiokawa, Yoshinobu; Onuki, Yoshichika
Physica B; Condensed Matter, 378-380, p.1009 - 1010, 2006/05
Times Cited Count：6 Percentile：31.23(Physics, Condensed Matter)no abstracts in English
Ikeda, Kiyoshi
Hitachino, (42), p.4 - 5, 2005/09
no abstracts in English
Ikeda, Kiyoshi
Joho No Kagaku to Gijutsu, 55(5), p.219 - 223, 2005/05
Conference proceedings are information resources used for researchers to access latest research trends. Although they are important materials that should be collected by the library, it is generally very difficult to acquire them because they are not commercially available. JAERI (Japan Atomic Energy Research Institute) Library collects about 19,000 proceedings and makes them available for the researchers. This paper introduces JAERI Library's experience in acquiring conference proceedings in a variety of ways including collecting conference information from academic societies or researchers, utilizing INIS (International Nuclear Information System) database as well as provision of conference proceedings. JAERI-Conf series, which are the proceedings of conferences hosted by JAERI and published as JAERI's research reports, are also introduced.
Onuma, Ikuo*; Kainuma, Ryosuke*; Uda, Minoru*; Iwadachi, Takaharu*; Uchida, Munenori*; Kawamura, Hiroshi; Ishida, Kiyohito*
JAERI-Conf 2004-006, p.172 - 183, 2004/03
no abstracts in English
Ishikawa, Masashi; Habara, Tadashi; Oshima, Takeshi
Joho No Kagaku to Gijutsu, 54(3), p.126 - 132, 2004/03
no abstracts in English
Nakajima, Hidemitsu
Senmon Toshokan, (200), p.11 - 12, 2003/07
no abstracts in English
Nozawa, Takashi; Habara, Tadashi; Itabashi, Keizo; Ishikawa, Masashi; Yonezawa, Minoru
Statistics in Practice - Measuring & Managing (Proceedings of IFLA Satellite Conference), p.173 - 178, 2003/05
The JAERI has 10 branch research sites in Japan. Because of the resent budget shrinkage and increasing journal price, it becomes more difficult to keep sufficient journal coverage at each branch library. Some of the users can read printed journals for their research work while the others are obliged to request a photocopy of journal articles from the central library of JAERI or affiliated libraries. It is necessary to improve this information gap among the sites. One of our attempts was to provide the electronic journals through the intranet. We carried out the qualitative analysis on the trend of journals usage both in printed and in electronic form, from the viewpoint of the effectiveness of providing electronic journals. It was found out that the users having less printed journals more frequently access to the electronic journals. This means that electronic journals are useful for the solution of information gap among the sites. The analysis also indicated that there exists a cost-effective compromise between providing printed journals and providing electronic journals.
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phase diagrams of CeSb and CeBiOsakabe, Toyotaka; Hannan, A.*; Kawana, Daichi*; Kogi, Masafumi*; Kitazawa, Hideaki*
Acta Physica Polonica B, 34(2), p.1469 - 1472, 2003/02
no abstracts in English
Hannan, A.*; Osakabe, Toyotaka; Kogi, Masafumi*; Iwasa, Kazuaki*
Applied Physics A, 74(Suppl.1), p.S565 - S567, 2002/12
Times Cited Count：6 Percentile：28.33(Materials Science, Multidisciplinary)no abstracts in English
phase diagram and magnetic structures of CeSbOsakabe, Toyotaka; Hannan, A.*; Tachi, N.*; Kogi, Masafumi*; Kitazawa, Hideaki*
Applied Physics A, 74(Suppl.1), p.S799 - S801, 2002/12
Times Cited Count：6 Percentile：28.33(Materials Science, Multidisciplinary)no abstracts in English
