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Miyakawa, Kazuya; Shimo, Michito*; Niwa, Masakazu; Amano, Kenji; Tokunaga, Tomochika*; Tonokura, Kenichi*
Fukada Chishitsu Kenkyujo Nempo, (22), p.139 - 153, 2021/00
no abstracts in English
Katsumi, Toshiyuki; Yoshida, Yasuhito*; Nakagawa, Ryo*; Yazawa, Shinya*; Kumada, Masashi*; Sato, Daisuke*; Thwe Thwe, A.; Chaumeix, N.*; Kadowaki, Satoshi
Journal of Thermal Science and Technology (Internet), 16(2), p.21-00044_1 - 21-00044_13, 2021/00
Times Cited Count：6 Percentile：35.68(Thermodynamics)The effects of addition of CO
and water vapor on characteristics of dynamic behavior of hydrogen/air premixed flames were elucidated experimentally. By Schlieren photography, wrinkles on the flame surface were clearly observed in low equivalence ratios. The propagation velocity increased monotonically as the flame radius became larger and flame acceleration was found. Increasing the addition of inert gas, the propagation velocity decreased, especially in the case of CO addition. Moreover, the Markstein length and the wrinkling factor decreased. This indicated that the addition of Co or HO promoted the unstable motion of hydrogen flames, which could be due to the enhancement of the diffusive-thermal effect. Based on the characteristics of dynamic behavior of hydrogen flames, the parameters used in the mathematical model on propagation velocity including flame acceleration was obtained, and then the flame propagation velocity under various conditions was predicted.
Miyakawa, Kazuya; Okumura, Fumiaki*
Geofluids, 2018, p.2436814_1 - 2436814_11, 2018/10
Times Cited Count：4 Percentile：31.76(Geochemistry & Geophysics)no abstracts in English
Sato, Osamu
JAERI-Research 2005-012, 32 Pages, 2005/05
JAERI-Research-2005-012.pdf:4.37MB
A study was made on the evolution of energy demand and supply toward the year 2050 and on the potential benefits of nuclear energy utilization in Japan. For this purpose, assumptions were made on future economic growths, improvement in energy intensity, availability and costs of energy sources and energy technologies. Then, based on these assumptions, three cases of long-term energy scenarios were built with a different scale of nuclear energy utilization, and through their comparison possible role of nuclear energy was analyzed. It was indicated from this study that expansion of nuclear energy utilization will contribute to the reduction of fossil energy consumption, and therefore, enhancement of stable supply of energy and substantial reduction of carbon dioxide emissions with low economic costs.
-particle diagnostics by CO laser collective Thomson scattering in ITERKondoh, Takashi; Richards, R. K.*; Hutchinson, D. P.*; Sugie, Tatsuo; Costley, A. E.*; Miura, Yukitoshi; Lee, S.*
Proceedings of 30th EPS Conference on Controlled Fusion and Plasma Physics (CD-ROM), 4 Pages, 2003/07
In order to understand the behavior of alpha-particles which are the dominant heat source in a burning plasma, it is necessary to measure the spatial distribution of the number of the alpha-particles and their energy spectrum. A collective Thomson scattering (CTS) system based on a pulsed CO laser is being developed and is under consideration for alpha-particle measurements on ITER. Heating beam ions (E = 1 MeV) are normally co-injected and have a similar velocity with alpha-particles in ITER. The CTS measurement can not, in general, distinguish beam ions and alpha-particles which have the same velocity. A vertical scattering geometry to distinguish between beam ions and alpha-particles is proposed. Calculations have shown that the vertically viewing CTS can resolve counter-travelling alphas without being masked by beam ions. Preliminary design of a beam line and a receiver system with the vertical scattering geometry has been developed. A proof-of-principle test on the CTS system using the JT-60U plasma is being conducted.
Kondoh, Takashi; Kawano, Yasunori; Costley, A. E.*; Malaquias, A.*; Sugie, Tatsuo; Walker, C.*
Proceedings of 30th EPS Conference on Controlled Fusion and Plasma Physics (CD-ROM), 4 Pages, 2003/07
In order to measure line average electron density for long pulse operation on ITER, a CO laser interferometer/polarimeter system has being selected. High reliability is necessary because the measurements will be used as a reference signal for real time control of the density during long plasma pulses. The design of the interferometer/polarimeter is improved from the previous design because of an input from experiences gained on JT-60U. A dual CO laser interferometer/polarimeter was chosen in order to improve reliability. The proof-of-principle test of the dual CO laser interferometer/polarimeter has been demonstrated and the system is operating routinely on JT-60U. Five tangential sight lines are designed near the midplane of ITER. The laser beams will be transmitted to the plasma through shielding labyrinths in an equatorial port and reflected by retroreflectors. Position of the laser beams will be remotely controlled by steering mirrors outside the port plug because the vacuum vessel of ITER will move due to change in temperature during long plasma pulses.
Choi, Y.; Yamamoto, Shunya; Saito, Hiroshi*; Sumita, Taishi*; Ito, Hisayoshi
Nuclear Instruments and Methods in Physics Research B, 206(1-4), p.241 - 244, 2003/05
Times Cited Count：7 Percentile：46.82(Instruments & Instrumentation)no abstracts in English
laser systemKondoh, Takashi; Lee, S.; Miura, Yukitoshi
Purazuma, Kaku Yugo Gakkai-Shi, 76(9), p.883 - 887, 2000/09
no abstracts in English
Huang, Z.*; Ohashi, Hirofumi; Inagaki, Yoshiyuki
JAERI-Tech 2000-022, p.30 - 0, 2000/03
JAERI-Tech-2000-022.pdf:1.24MB
no abstracts in English
Mineo, Hideaki; ; *; Uchiyama, Gunzo; Fujine, Sachio
Proc. of 7th Int. Conf. on Radioactive Waste Mamagement and Environmental Remediation (ICEM '99)(CD-ROM), 3 Pages, 1999/00
no abstracts in English
Inaba, Yoshitomo; Fumizawa, Motoo; Hishida, Makoto; Ogawa, Masuro; Aritomi, Masanori*; Kozaki, Yasutsugu*; *; *; *; *; et al.
JAERI-Tech 96-019, 122 Pages, 1996/05
no abstracts in English
Inaba, Yoshitomo; Fumizawa, Motoo; Hishida, Makoto; Ogawa, Masuro; ; Aritomi, Masanori*; Kozaki, Yasutsugu*; *; *; *; et al.
JAERI-Review 96-007, 87 Pages, 1996/05
JAERI-Review-96-007.pdf:2.66MB
no abstracts in English
Kumamaru, Hiroshige; ; Murata, Hideo; Kukita, Yutaka; Akiyama, Mamoru*; *; *; *; *; *; et al.
Proc. of ASME
JSME 4th Int. Conf. on Nuclear Engineering 1996 (ICONE-4), 1(PART B), p.669 - 674, 1996/00
no abstracts in English
Hada, Kazuhiko
JAERI-M 93-029, 99 Pages, 1993/03
no abstracts in English
Ogawa, Toru; Fukuda, Kosaku; Kashimura, Satoru; Tobita, Tsutomu; Kobayashi, Fumiaki; ; ; ; Kikuchi, Teruo
Journal of the American Ceramic Society, 75(11), p.2985 - 2990, 1992/11
Times Cited Count：41 Percentile：84.71(Materials Science, Ceramics)no abstracts in English
Minato, Kazuo; Ogawa, Toru; Kashimura, Satoru; Fukuda, Kosaku; ; ;
J. Mater. Sci., 26, p.2379 - 2388, 1991/00
Times Cited Count：15 Percentile：61.54(Materials Science, Multidisciplinary)no abstracts in English
-CO-CH
-HO mixtures and coolant chemistryIkezoe, Yasumasa; Onuki, Kaoru; Shimizu, Saburo; *; Tagawa, S.*; Tabata, Yoneho*
Radiation Physics and Chemistry, 36(3), p.279 - 284, 1990/00
no abstracts in English
;
Radiation Physics and Chemistry, 33(6), p.567 - 572, 1989/00
no abstracts in English
Saeki, Masakatsu; Hirabayashi, Takakuni; ; *; Tachikawa, Enzo
Journal of Nuclear Science and Technology, 20(9), p.762 - 768, 1983/00
Times Cited Count：11 Percentile：75.46(Nuclear Science & Technology)no abstracts in English
/CO mixtures; ;
Z.Phys.Chem.,Neue Folge, 131, p.47 - 56, 1982/00
no abstracts in English
