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Imai, Nobuaki*; Otsu, Hideaki*
JAEA-Conf 2021-001, 236 Pages, 2022/03
JAEA-Conf-2021-001.pdf:48.06MB
The 2020 Symposium on Nuclear Data was held on-site at RIBF Conference Hall in RIKEN Wako campus on November 26 to 27, 2020, combined with on-line connection conference. The symposium was organized by the Nuclear Data Division of the Atomic Energy Society of Japan (AESJ) in cooperation with Sigma Investigative Advisory Committee of AESJ, Nuclear Science and Engineering Center of Japan Atomic Energy Agency (JAEA), RIKEN Nishina Center, Center for Nuclear Study, The University of Tokyo (CNS), KEK Wako Nuclear Science Center (WNSC), School of Science, The University of Tokyo. In the symposium, six sessions were proposed and held: "Reactor theory and experiments" as a tutorial, "Accelerator Facilities and Nuclear Data", "Deep/Machine Learning and Nuclear Physics, Application to Nuclear Data", "Nuclear Medicine and Nuclear Pharmacy", "Fission, Heavy Ion Nuclear Spectroscopy", and "Nuclear Reaction Data" as lecture and discussion sessions. In addition, recent research progress on experiments, nuclear theory, evaluation, benchmark and applications were presented in the poster session. The total number of participants was 119, of which 62 were on-site participants. Each oral and poster presentation was followed by an active question and answer session. This report consists of total 40 papers including 15 oral and 25 poster presentations.
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.
Suzuki, Hideaki; Nakama, Shigeo; Fujita, Tomoo; Imai, Hisashi; Sazarashi, Masami
Genshiryoku Bakkuendo Kenkyu (CD-ROM), 19(2), p.39 - 50, 2012/12
For the safety assessment of a geological disposal system for high-level radioactive waste, it is necessary to quantify coupled thermo-hydro-mechanical-chemical (THMC) processes in the near-field. The current study investigated the geochemical changes arising from the infiltration of groundwater into the bentonite buffer under a thermal regime of radiogenic heating arising from the vitrified waste with the computer simulated assistance of a developed THMC model. In the case of infiltration by a saline groundwater, sulfate precipitates as gypsum around the overpack in the bentonite buffer and the Na-type bentonite changes to Ca-type by exposure to Ca ions released from concrete supports. In addition, the temporal evolution of the bentonite buffer porewater composition can be obtained to assess its contribution to the corrosion of the overpack.
Matsuura, Hideharu*; Iwata, Hiroshi*; Kagamihara, So*; Ishihara, Ryohei*; Yoneda, Masahiko*; Imai, Hideaki*; Kikuta, Masanori*; Inoue, Yuki*; Hisamatsu, Tadashi*; Kawakita, Shiro*; et al.
Japanese Journal of Applied Physics, Part 1, 45(4A), p.2648 - 2655, 2006/04
Times Cited Count：15 Percentile：48.56(Physics, Applied)no abstracts in English
from molten saltsAbe, Hideki*; Yoshii, Kenji; Nishida, Kenji*; Imai, Motoharu*; Kitazawa, Hideaki*
Journal of Physics and Chemistry of Solids, 66(2-4), p.406 - 409, 2005/04
Times Cited Count：8 Percentile：36.25(Chemistry, Multidisciplinary)An electroplating technique of the superconductive boride MgB onto graphite substrates is reported. Films of MgB with a thickness of tens micrometer were fabricated on the planar and curved surfaces of graphite substrates by means of electrolysis on a mixture of magnesium chloride, potassium chloride, sodium chloride, and magnesium borate fused at high temperatures in an Ar atmosphere. The electrical resistivity and magnetization measurements revealed that the electroplated MgB films undergo a superconducting transition with the critical temperature of 36 K.
from molten saltsAbe, Hideki*; Yoshii, Kenji; Nishida, Kenji*; Imai, Motoharu*; Kitazawa, Hideaki*
Journal of Physics and Chemistry of Solids, 66(1), p.406 - 409, 2005/01
no abstracts in English
films electroplated to stainless steel substratesAbe, Hideki*; Nishida, Kenji*; Imai, Motoharu*; Kitazawa, Hideaki*; Yoshii, Kenji
Applied Physics Letters, 85(25), p.6197 - 6199, 2004/12
Times Cited Count：15 Percentile：50.95(Physics, Applied)no abstracts in English
(M
,Si) (M=Sr and Ba, M=Al and Ga), ternary silicides with the AlB-type structureImai, Motoharu*; Nishida, Kenji*; Kimura, Takashi*; Kitazawa, Hideaki*; Abe, Hideki*; Kito, Hijiri*; Yoshii, Kenji
Physica C, 382(4), p.361 - 366, 2002/11
Times Cited Count：58 Percentile：88.36(Physics, Applied)no abstracts in English
PbO
from fused nitratesAbe, Hideki*; Ye, J.*; Imai, Motoharu*; Yoshii, Kenji; Matsushita, Akiyuki*; Kitazawa, Hideaki*
Journal of Crystal Growth, 241(3), p.347 - 351, 2002/06
Times Cited Count：10 Percentile：58.42(Crystallography)no abstracts in English
Yanagizawa, Koichi; Imai, Hisashi; ; Osawa, Hideaki;
PNC TN7410 91-013, 125 Pages, 1991/03
A hydrogeological measurement system was set up in order to understand the shaft excavation effect on groundwater flow quantitatively in the area of 300 meters square at the center of which the shaft is to be located. The meteorological and hydtological investigations have been performed, based on the data obtained by the measurement of river discharge rate, permeability tests and periodical monitoring of distribution of pore pressure. The present paper, first of all, describes the data and informations obtained from the measurement system before the excavation, secondly the handling of the data and the process for modelling of the hydrogeological structure and setting of some conditions for numerical simulation of the groundwater flow, and thirdly the examination of the model and the condition for calculation. Finally it referrs to the predictive simulation of the excavation effect on the groundwater flow for the period of the following three years. As the results of the simulated calculation based on the above model and conditions, estimations on the groundwater flow are summarized as follows: (a)Degree of decrease of pore pressure is smaller in accordance with distance from the shaft. The remarkably effected area is restricted within 100 meters during the next three years after the excavation. (b)When the excavated shaft passes through the Tsukiyoshi fault and reaches a highly permeable zone, the outflow into the shaft increases rapidly. The maximum outflow becomes up to about 30 L/min at the final stage of the excavation. (c)Decrease of the outflow into the existing shaft and drift is not distinct. However, the outflow decreases so gradually, when the excavation gets near to the final stage. Decrease of the outflow is about 2L/min. Method for the predictive analysis of groundwater flow developed in this study is required to be examined through a comparison between the results of prediction and the measurements during and after the excavation. It is ...
Suzuki, Hideaki; Nakama, Shigeo; Fujita, Tomoo; Imai, Hisashi; Sazarashi, Masami
no journal, ,
no abstracts in English
Sazarashi, Masami; Suzuki, Hideaki; Fujita, Tomoo; Yamashita, Ryo*; Imai, Hisashi
no journal, ,
no abstracts in English
Imai, Hisashi; Sazarashi, Masami; Suzuki, Hideaki; Fujita, Tomoo
no journal, ,
no abstracts in English
Sazarashi, Masami; Imai, Hisashi; Suzuki, Hideaki; Fujita, Tomoo
no journal, ,
no abstracts in English
Konishi, Suzuka*; Minagawa, Hideaki*; Majima, Takuya*; Imai, Makoto*; Saito, Manabu*; Hirade, Tetsuya; Tsuchida, Hidetsugu*
no journal, ,
To clarify the damage behavior under ion irradiation in quartz glass, Age-Momentum Correlation measurement that is a coincidence measurement of positron annihilation lifetime and annihilation gamma ray Doppler broadening was performed under 2 MeV proton irradiation. From the change in momentum distribution of electrons involved in positron annihilation in voids of the quartz glass, flux dependence of damage behavior could be detected.
Sazarashi, Masami; Imai, Hisashi; Suzuki, Hideaki; Fujita, Tomoo
no journal, ,
no abstracts in English
