Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Nishimura, Akihiko; Takenaka, Yusuke*; Furusawa, Akinori; Torimoto, Kazuhiro; Ueda, Masashi; Fukuda, Naoaki*; Hirao, Kazuyuki*
E-Journal of Advanced Maintenance (Internet), 9(2), p.52 - 59, 2017/08
no abstracts in English
Sakaki, Hironao; Nishiuchi, Mamiko; Maeda, Shota; Sagisaka, Akito; Pirozhkov, A. S.; Pikuz, T.; Faenov, A.*; Ogura, Koichi; Fukami, Tomoyo; Matsukawa, Kenya*; et al.
Review of Scientific Instruments, 85(2), p.02A705_1 - 02A705_4, 2014/02
Times Cited Count：2 Percentile：10.65(Instruments & Instrumentation)High intensity laser-plasma interaction has attracted considerable interest for a number of years. The laser-plasma interaction is accompanied by generation of various charged particle beams. Results of simultaneous novel measurements of electron-induced photonuclear neutrons (photoneutron), which are a diagnostic of the laser-plasma interaction, are proposed to use for optimization of the laser-plasma ion generation. The proposed method is demonstrated by the laser irradiation with the intensity os 1
10
W/cm
on the metal foil target. The photoneutrons are measured by using NE213 liquid scintillation detectors. Heavy-ion signal is registered with the CR39 track detector simultaneously. The measured signals of the electron-induced photoneutrons are well reproduced by using the Particle and Heavy Ion Transport code System (PHITS). The results obtained provide useful approach for analyzing the various laser based ion beams.
Takizawa, Kentaro*; Kakehashi, Kazuyuki*; Fukuda, Toshiaki*; Kida, Toru*; Sawa, Kazuhiro; Sumita, Junya; Kato, Yutai*; Snead, L. L.*
Ceramic Materials for Energy Applications; Ceramic Engineering and Science Proceedings, Vol.32, No.9, p.13 - 19, 2011/11
Fine-grained isotropic graphite shows high strength making it a promising material for the graphite component of High Temperature Gas-cooled Reactor (HTGR) and Very High Temperature Reactor (VHTR). Service life of the graphite component is determined primarily by the residual strength after neutron irradiation in the reactor core. It is expected that development of a new nuclear grade graphite possessing higher strength will contribute toward added design margins and an extension of the service life of components, which likely improve the reactor economy very significantly. Tokai Carbon Co. LTD. has started the development of nuclear grade graphite for the graphite component of VHTR. G347S and G458S grades are fine-grained isotropic graphites having high tensile strength greater than 30 MPa. It is planned to carry out the neutron irradiation tests using High Flux Isotope Reactor at Oak Ridge National Laboratory up to the neutron fluence of 30 dpa and the irradiation temperatures of 300-900
C. The dimensional changes, elastic modulus, coefficient of thermal expansion, etc., will be studied. It is also planned to evaluate the non-irradiated mechanical/thermal properties and the irradiation effects in collaboration with Japan Atomic Energy Agency. This paper introduces our technical R&D plan for G347S and G458S. The initial results of the properties and the irradiation test plan are also shown.
Koga, J. K.; Moribayashi, Kengo; Fukuda, Yuji; Bulanov, S. V.; Sagisaka, Akito; Ogura, Koichi; Daido, Hiroyuki; Yamagiwa, Mitsuru; Kimura, Toyoaki*; Fujikawa, Taketoshi*; et al.
Journal of Physics D; Applied Physics, 43(2), p.025204_1 - 025204_15, 2010/01
Times Cited Count：18 Percentile：57.27(Physics, Applied)Kawase, Keigo; Kando, Masaki; Hayakawa, Takehito; Daito, Izuru; Kondo, Shuji; Homma, Takayuki; Kameshima, Takashi; Kotaki, Hideyuki; Chen, L.*; Fukuda, Yuji; et al.
Nuclear Physics Review, 26(Suppl.), p.94 - 99, 2009/07
We constructed MeV- and sub-MeV-photon sources by means of Compton backscattering with a laser light and an electron beam at SPring-8 and KPSI-JAEA. MeV-photon source consists of a continuous-wave optically-pumped far infrared laser and an 8-GeV stored electron beam. Sub-MeV-photon source consists of a Nd:YAG pulse-laser and an 150-MeV electron beam accelerated by a microtron. Both source have been succeeded backscattered photon generation. In this talk, I will present characteristics and future prospects of these photon sources.
Nobuto, Jun*; Fukuda, Kazuhiro*; Sato, Toshinori; Kuroda, Hidetaka
Tonneru Kogaku Hokokushu (CD-ROM), 16, p.1 - 8, 2006/11
In this paper, we examine the mechanical behavior of shaft excavated by short-step sinking method, as part of the researches to verify the applicability of engineering technologies. Concretely, the shaft behavior during excavation is analyzed with FEM to estimate the deformation and stress state of rock mass and concrete lining support. Next, we actually measure rock mass deformation around the shaft and compare them with FEM analysis results. In addition, we apply inverse analysis method to short step sinking shaft in order to understand the shaft behavior better, and finally summarize the technological points to enhance the accuracy of inverse analysis method.
Oikawa, Toshihiro; Ushigusa, Kenkichi; Forest, C. B.*; Nemoto, Masahiro; Naito, Osamu; Kusama, Yoshinori; Kamada, Yutaka; Tobita, Kenji; Suzuki, Shingo*; Fujita, Takaaki; et al.
Nuclear Fusion, 40(3Y), p.435 - 443, 2000/03
Times Cited Count：45 Percentile：76.63(Physics, Fluids & Plasmas)no abstracts in English
Hayashi, Kimio; Sawa, Kazuhiro; Shiratori, Tetsuo; Kikuchi, Hironobu; Fukuda, Kosaku; Kitajima, Toshio; Ito, Tadaharu; Waragai, Hyota
JAERI-Research 2000-001, p.116 - 0, 2000/01
JAERI-Research-2000-001.pdf:21.78MB
no abstracts in English
Oikawa, Toshihiro; Ushigusa, Kenkichi; Forest, C. B.*; Nemoto, Masahiro; Naito, Osamu; Kusama, Yoshinori; Kamada, Yutaka; Tobita, Kenji; Suzuki, Shingo*; Fujita, Takaaki; et al.
Fusion Energy 1998, Vol.2, p.551 - 558, 1998/10
no abstracts in English
Minato, Kazuo; Sawa, Kazuhiro; Fukuda, Kosaku; Baldwin, C. A.*; Gabbard, W. A.*; O.F.Kimball*; Malone, C. M.*; F.C.Montgomery*; B.F.Myers*; N.H.Packan*
JAERI-Research 98-021, 187 Pages, 1998/03
JAERI-Research-98-021.pdf:13.23MB
no abstracts in English
Sawa, Kazuhiro; Minato, Kazuo; Tobita, Tsutomu*; Fukuda, Kosaku
Nuclear Technology, 118(2), p.123 - 131, 1997/05
Times Cited Count：1 Percentile：14.29(Nuclear Science & Technology)no abstracts in English
Sawa, Kazuhiro; Minato, Kazuo; Fukuda, Kosaku
JAERI-Research 96-063, 34 Pages, 1996/11
JAERI-Research-96-063.pdf:1.15MB
no abstracts in English
Sawa, Kazuhiro; Shiozawa, Shusaku; Minato, Kazuo; Fukuda, Kosaku
Journal of Nuclear Science and Technology, 33(9), p.712 - 720, 1996/09
Times Cited Count：25 Percentile：86.19(Nuclear Science & Technology)no abstracts in English
Tobita, Tsutomu; Minato, Kazuo; Sawa, Kazuhiro; Fukuda, Kosaku; Sekino, Hajime; Iida, Shozo;
JAERI-Research 96-014, 34 Pages, 1996/03
JAERI-Research-96-014.pdf:2.15MB
no abstracts in English
Minato, Kazuo; ; Sawa, Kazuhiro; Tobita, Tsutomu; Fukuda, Kosaku
JAERI-Tech 95-056, 45 Pages, 1996/01
no abstracts in English
Sawa, Kazuhiro; Fukuda, Kosaku; R.Acharya*
JAERI-Tech 94-038, 46 Pages, 1995/01
no abstracts in English
Sawa, Kazuhiro; Shiozawa, Shusaku; Fukuda, Kosaku;
Journal of Nuclear Science and Technology, 29(9), p.842 - 850, 1992/09
no abstracts in English
Kobayashi, Fumiaki; Shiozawa, Shusaku; Hayashi, Kimio; Sawa, Kazuhiro; ; Fukuda, Kosaku; ; Sato, Tsutomu*
JAERI-M 92-079, 75 Pages, 1992/06
no abstracts in English
Hayashi, Kimio; Shiozawa, Shusaku; Shindo, Masami; Iyoku, Tatsuo; ; Kikuchi, Takayuki; Sawa, Kazuhiro; Nakagawa, Shigeaki; Kashimura, Satoru; ; et al.
JAERI-M 91-140, 61 Pages, 1991/09
no abstracts in English
Hayashi, Kimio; ; ; Shiozawa, Shusaku; Sawa, Kazuhiro; ; Kikuchi, Teruo; Fukuda, Kosaku
JAERI-M 91-111, 38 Pages, 1991/07
no abstracts in English
