Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Sugita, Tsuyoshi; Mori, Masanobu*; Kozai, Naofumi
Journal of Photochemistry and Photobiology A; Chemistry, 438, p.114548_1 - 114548_6, 2023/04
Removal of iodine from water contaminated by nuclear accidents or the release of radioactive waste is complicated and costly because iodine exists in a variety of forms in the water. We investigated the unification of iodine species by photocatalysis as a pretreatment for removing radioactive iodine species from water. The effect of the TiO crystal phase of Pt-TiO
and solution pH on the photocatalytic redox reactions of iodide (I
), iodate (IO
), and o-iodobenzoic acid were evaluated. The choice of TiO
crystalline phase and pH allowed the mixture of iodine species to be unified to only I
or IO
. Regardless of the type of Pt-TiO
, the iodine in o-iodobenzoic acid was mineralized to I
under alkaline conditions. Because the iodine species can be unified to a single species by selecting the photocatalyst and the solution pH, this photocatalytic treatment could be applied to remove iodine species with high efficiency.
Materials Sciences Research Center
JAEA-Evaluation 2022-013, 105 Pages, 2023/03
Japan Atomic Energy Agency (hereafter referred to as "JAEA") consulted an assessment committee, "Evaluation Committee of Research Activities for Research and Development in Science and Technology Using Neutron and Synchrotron Radiation" (hereafter referred to as "Evaluation Committee") for ex-ante evaluation of "Research and Development in Science and Technology Using Neutron and Synchrotron Radiation", in accordance with "General Guideline for the Evaluation of Government Research and Development (R&D) Activities" by Cabinet Office, Government of Japan, "Guideline for Evaluation of R&D in Ministry of Education, Culture, Sports, Science and Technology" and "Regulation on Conduct for Evaluation of R&D Activities" by JAEA. In response to the JAEA's request, the Committee assessed the research program and activities on Research and Development in Science and Technology Using Neutron and Synchrotron Radiation in Materials Sciences Research Center (MSRC) and Neutron Science Section (NSS) in Materials and Life Science Division (MLSD) of J-PARC Center during the period from April 2022 to March 2029. The Committee evaluated the management, research and development activities based on the explanatory documents prepared by MSRC and NSS and oral presentations with questions-and-answers by the Director General and the Division Heads of the MSRC and the Deputy Director General and the NSS Section Leader of J-PARC Center. This report summarizes the results of the assessment by the Evaluation Committee with the Committee report attached.
Materials Sciences Research Center
JAEA-Evaluation 2022-012, 87 Pages, 2023/03
Japan Atomic Energy Agency (hereafter referred to as "JAEA") consulted an assessment committee, "Evaluation Committee of Research Activities for Research and Development in Science and Technology Using Neutron and Synchrotron Radiation" (hereafter referred to as "Evaluation Committee") for ex-post evaluation of "Research and Development in Science and Technology Using Neutron and Synchrotron Radiation", in accordance with "General Guideline for the Evaluation of Government Research and Development (R&D) Activities" by Cabinet Office, Government of Japan, "Guideline for Evaluation of R&D in Ministry of Education, Culture, Sports, Science and Technology" and "Regulation on Conduct for Evaluation of R&D Activities" by JAEA. In response to the JAEA's request, the Committee assessed the research program and activities on Research and Development in Science and Technology Using Neutron and Synchrotron Radiation in Materials Sciences Research Center (MSRC) and Neutron Science Section (NSS) in Materials and Life Science Division (MLSD) of J-PARC Center during the period from April 2015 to October 2021. The Committee evaluated the management, research and development activities based on the explanatory documents prepared by MSRC and NSS and oral presentations with questions-and-answers by the Director General and the Division Heads of the MSRC and the Deputy Director General and the NSS Section Leader of J-PARC Center. This report summarizes the results of the assessment by the Evaluation Committee with the Committee report attached.
Ao, N.*; Zhang, H.*; Xu, H. H.*; Wu, S. C.*; Liu, D.*; Xu, P. G.; Su, Y. H.; Kang, Q. H.*; Kang, G. Z.*
Engineering Fracture Mechanics, 281, p.109166_1 - 109166_14, 2023/03
Massey, D.*; Williams, C. D.*; Mu, J.*; Masters, A. J.*; Motokawa, Ryuhei; Aoyagi, Noboru; Ueda, Yuki; Antonio, M. R.*
Journal of Physical Chemistry B, 127(9), p.2052 - 2065, 2023/03
Gong, W.; Kawasaki, Takuro; Zheng, R.*; Mayama, Tsuyoshi*; Sun, B.*; Aizawa, Kazuya; Harjo, S.; Tsuji, Nobuhiro*
Scripta Materialia, 225, p.115161_1 - 115161_5, 2023/03
Times Cited Count:0 Percentile:0.05(Nanoscience & Nanotechnology)Tokunaga, Sho; Iguchi, Shintaro; Kawamura, Sho; Hirane, Nobuhiko
JAEA-Technology 2022-004, 74 Pages, 2023/02
In JRR-3, in response to the new regulatory standard for research reactors that is enforced December 2013, we submitted the application document of reactor installation license for the JRR-3 on September 2014, and acquired the permission on November 2018. Thereafter, we carried out impact assessment for internal overflow based on the design principles as described in the application document of reactor installation license for the JRR-3. There are two legal requirements for internal overflow. The first is to ensure that the necessary safety functions are not lost due to internal overflow that occur in the facility. The second is to prevent leakage of liquid containing radioactive materials outside the radiation controlled area in the event of an internal overflow. For these requirements, assuming each overflow source, it was confirmed that the necessary safety functions would not be lost and that liquid containing radioactive materials would not leak outside the controlled area. Regarding these assessments, design and construction plans were submitted in installments, and the approvals were obtained sequentially. This report shows the result that is impact assessment for internal overflow in JRR-3.
Uno, Yuki; Ouchi, Yasuhiro; Ouchi, Satoshi; Baba, Ryota; Kikuchi, Masanobu; Kawamata, Satoshi
JAEA-Technology 2021-046, 39 Pages, 2023/02
JRR-3 (Japan Research Reactor No.3) is a light water research reactor cooling pool type light water deceleration of low-enriched uranium up to 20MW thermal power. November 1990, begin to operation in modified that we are provided to users as a high neutron flux form reactor facility in various types of irradiation facilities and neutron beam experiment equipment. Currently, JRR-3 has completed the period of facility inspections, which had been extended due to the effects of the Great East Japan Earthquake of March 11, 2011, and has been able to conformity to the New Regulatory Requirements. It has also resumed operation for the first time in about 10 years. FY 2017, overhauled the primary cooling heat exchanger No.1 and No.2 based on a maintenance plan. This is report for take advantage what inspection and maintenance of future about overhaul of the primary cooling system heat exchanger for collect of inspection records and performance.
Kawamura, Sho; Kikuchi, Masanobu; Hosoya, Toshiaki
JAEA-Technology 2021-041, 103 Pages, 2023/02
In response to new regulatory standard for research and test reactor which is enforced December 2013, JRR-3 got license in November 2018 by formulate new design basis ground motion. After that we evaluated for insertion property of control rod using that new design basis ground motion, and that evaluation results were accepted as approval of the design and construction method by Nuclear Regulation Authority. Now, we re-evaluated to insertion property of control rod about neutron absorber and follower fuel element by time history response analysis method. In this report, it shows that new results have sufficiency of margin compared with the past results that are accepted as approval of the design and construction method.
Kikuchi, Masanobu; Kawamura, Sho; Hosoya, Toshiaki
JAEA-Technology 2021-040, 86 Pages, 2023/02
In JRR-3, in response to new regulatory standard for research and test reactor which is enforced December 2013, we established new design basis ground motion for confirming new regulatory standard and carried out seismic evaluations of the appointments, instruments and structures which are installed in JRR-3 by using that earthquake motion. This report shows that the result of evaluations by fatigue strength evaluation, which is more detailed evaluation approach, about Control Rod Drive Mechanism (CRDM) and the CRDM Guide Tube that have gotten the serious result of seismic safety margin by using time history response analysis method. As a result, it was confirmed that CRDM and the CRDM Guide Tube have sufficient seismic safety margin.
Lam, T.-N.*; Chin, H.-H.*; Zhang, X.*; Feng, R.*; Wang, H.*; Chiang, C.-Y.*; Lee, S. Y.*; Kawasaki, Takuro; Harjo, S.; Liaw, P. K.*; et al.
Acta Materialia, 245, p.118585_1 - 118585_9, 2023/02
Times Cited Count:0 Percentile:0(Materials Science, Multidisciplinary)Yamamoto, Naoki*; Matsumura, Daiju; Hagihara, Yuto*; Tanaka, Kei*; Hasegawa, Yuta*; Ishii, Kenji*; Tanaka, Hirohisa*
Journal of Power Sources, 557, p.232508_1 - 232508_10, 2023/02
Nakagawa, Hiroshi; Yamamoto, Naoki*
Life (Internet), 13(2), p.318_1 - 318_15, 2023/02
Incoherent neutron scattering and terahertz spectroscopy have approximately the same energy range of measurement. Since both techniques are used to study the dynamics of proteins and hydrated water, it is important to review the advantages and disadvantages of both techniques and the relevant literature. To the best of our knowledge, there is no review of both methods, and we believe that this review is of high value.
Tsuda, Yasutaka
Nihonkai Shimbun, P. 7, 2023/02
no abstracts in English
Fujihara, Masayoshi; Hagihara, Masato; Morita, Katsuhiro*; Murai, Naoki; Koda, Akihiro*; Okabe, Hirotaka*; Mitsuda, Setsuo*
Physical Review B, 107(5), p.054435_1 - 054435_8, 2023/02
The = 1/2 Heisenberg linear chain antiferromagnet is the simplest spin model; nevertheless it serves as a platform for various quantum many-body phenomena. Here, we report the magnetic behavior of a quasi-one-dimensional antiferromagnet KCuPO
H
O. A long-range commensurate antiferromagnetic order with ordered moment 0.31(1)
per spin occurs at
= 11.7(1) K. Above
, the inelastic neutron excitation is characterized by a two spinon continuum. The intrachain interaction
and interchain interaction
are estimated to be 172 K and 4.25(4) K, respectively; thus the ratio of the
/
= 0.0247(3). At lower energies, below
, a spin gap is observed in the dispersive excitations. These results are consistent with characteristics observed in weakly interacting
= 1/2 Heisenberg chain system.
Hirano, Tatsumi*; Maeda, Takehiro*; Murata, Tetsuyuki*; Yamaki, Takahiro*; Matsubara, Eiichiro*; Shobu, Takahisa; Shiro, Ayumi*; Yasuda, Ryo*; Takamatsu, Daiko*
SPring-8/SACLA Riyo Kenkyu Seikashu (Internet), 11(1), p.49 - 57, 2023/02
Sawaguchi, Takahiro*; Tomota, Yo*; Yoshinaka, Fumiyoshi*; Harjo, S.
Acta Materialia, 242, p.118494_1 - 118494_14, 2023/01
Times Cited Count:0 Percentile:0.04(Materials Science, Multidisciplinary)Wakamatsu, Katsuhiro*; Sekihara, Akihori*; Yamaguchi, Yoshihiko*; Matsushima, Ryo*; Matsumura, Daiju; Kuila, T.*; Yoshikawa, Hirofumi*
Batteries & Supercaps (Internet), 6(1), p.e202200385_1 - e202200385_8, 2023/01
Times Cited Count:0 Percentile:0.01(Electrochemistry)Liu, S.*; Yang, D. S.*; Wang, S.*; Luan, H.*; Sekine, Yurina; Model, J. B.*; Aranyosi, A. J.*; Ghaffari, R.*; Rogers, J. A.*
EcoMat (Internet), 5(1), p.e12270_1 - e12270_18, 2023/01
Times Cited Count:2 Percentile:75.4(Chemistry, Physical)Advanced capabilities in noninvasive, in situ monitoring of sweat serve as the basis for obtaining real-time insights into human physiological state, health, and performance. Although recently reported microfluidic systems support powerful functions, most are designed as single-use disposables. Here, we introduce materials and molding techniques that bypass these concerns through biodegradable microfluidic systems with a full range of features. The key components fully degrade through the enzymatic action of microorganisms in natural soil environments. Detailed characterization of the device reveal a set of essential performance parameters that are comparable to, or even better than, those of non-degradable counterparts. Human subject studies illustrate the ability of these devices to acquire accurate measurements of sweat loss, sweat rate, pH, and chloride concentration.
Zhang, H.*; Wu, S. C.*; Ao, N.*; Zhang, J. W.*; Li, H.*; Zhou, L.*; Xu, P. G.; Su, Y. H.
International Journal of Fatigue, 166, p.107296_1 - 107296_11, 2023/01
Times Cited Count:0 Percentile:0.03(Engineering, Mechanical)