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JAEA Reports

Proceedings of the 2020 Symposium on Nuclear Data; November 26-27, 2020, RIKEN Nishina Center, RIKEN Wako Campus, Wako, Saitama, Japan

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.

Journal Articles

High temperature gas-cooled reactors

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$$^{circ}$$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.

Journal Articles

A Long-term THMC assessment on the geochemical behavior of the bentonite buffer

Suzuki, Hideaki; Nakama, Shigeo; Fujita, Tomo; 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.

Journal Articles

Si substrate suitable for radiation-resistant space solar cells

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:51.29(Physics, Applied)

no abstracts in English

Journal Articles

Electroplating of the superconductive boride MgB$$_{2}$$ from molten salts

Abe, 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:7 Percentile:35.17(Chemistry, Multidisciplinary)

An electroplating technique of the superconductive boride MgB$$_{2}$$ onto graphite substrates is reported. Films of MgB$$_{2}$$ 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$$_{2}$$ films undergo a superconducting transition with the critical temperature of 36 K.

Journal Articles

Electroplating of the superconductive boride MgB$$_{2}$$ from molten salts

Abe, 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

Journal Articles

Superconducting properties of MgB$$_{2}$$ films electroplated to stainless steel substrates

Abe, Hideki*; Nishida, Kenji*; Imai, Motoharu*; Kitazawa, Hideaki*; Yoshii, Kenji

Applied Physics Letters, 85(25), p.6197 - 6199, 2004/12

 Times Cited Count:15 Percentile:53.03(Physics, Applied)

no abstracts in English

Journal Articles

Superconductivity of M$$_{I}$$(M$$_{II}$$$$_{0.5}$$,Si$$_{0.5}$$)$$_{2}$$ (M$$_{I}$$=Sr and Ba, M$$_{II}$$=Al and Ga), ternary silicides with the AlB$$_{2}$$-type structure

Imai, 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:56 Percentile:89.04(Physics, Applied)

no abstracts in English

Journal Articles

Single-crystal growth of silver-lead oxide Ag$$_{5}$$Pb$$_{2}$$O$$_{6}$$ from fused nitrates

Abe, 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:60.13(Crystallography)

no abstracts in English

Oral presentation

Estimation of unsaturated parameters of buffer material under salinity infiltrating condition

Imai, Hisashi; Sazarashi, Masami; Suzuki, Hideaki; Fujita, Tomo

no journal, , 

no abstracts in English

Oral presentation

Application of resistivity tomography to measurement of re-saturation behavior in buffer material

Suzuki, Hideaki; Nakama, Shigeo; Fujita, Tomo; Imai, Hisashi; Sazarashi, Masami

no journal, , 

no abstracts in English

Oral presentation

Development of simulation technology for salt accumulation in compacted bentonite, 4

Sazarashi, Masami; Imai, Hisashi; Suzuki, Hideaki; Fujita, Tomo

no journal, , 

no abstracts in English

Oral presentation

Estimation of moisture characteristic curve for buffer material under infiltration condition

Sazarashi, Masami; Suzuki, Hideaki; Fujita, Tomo; Yamashita, Ryo*; Imai, Hisashi

no journal, , 

no abstracts in English

Oral presentation

Development of simulation technology for salt accumulation in compacted bentonite, 5

Sazarashi, Masami; Imai, Hisashi; Suzuki, Hideaki; Fujita, Tomo

no journal, , 

no abstracts in English

Oral presentation

AMOC measurement for fused quartz during ion irradiation

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.

15 (Records 1-15 displayed on this page)
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