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Journal Articles

A Proposed method to discriminate a gas derived from deep underground by focusing on the relationship between changes in methane and carbon dioxide concentrations in the atmosphere

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

Journal Articles

The Effects of addition of carbon dioxide and water vapor on the dynamic behavior of spherically expanding hydrogen/air premixed flames

Katsumi, Toshiyuki; Yoshida, Yasuhito*; Nakagawa, Ryo*; Yazawa, Shinya*; Kumada, Masashi*; Sato, Daisuke*; Thwe, T. 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:2 Percentile:51.09(Thermodynamics)

The effects of addition of CO$$_{2}$$ 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$$_{2}$$ addition. Moreover, the Markstein length and the wrinkling factor decreased. This indicated that the addition of Co$$_{2}$$ or H$$_{2}$$O 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.

Journal Articles

Improvements in drill-core headspace gas analysis for samples from microbially active depths

Miyakawa, Kazuya; Okumura, Fumiaki*

Geofluids, 2018, p.2436814_1 - 2436814_11, 2018/10

 Times Cited Count:2 Percentile:12.26(Geochemistry & Geophysics)

no abstracts in English

JAEA Reports

A Study on long-term energy scenarios for Japan

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.

Journal Articles

Prospects for $$alpha$$-particle diagnostics by CO$$_{2}$$ laser collective Thomson scattering in ITER

Kondoh, 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$$_{2}$$ 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.

Journal Articles

Toroidal interferometer/polarimeter density measurement system for long pulse operation on ITER

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$$_{2}$$ 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$$_{2}$$ laser interferometer/polarimeter was chosen in order to improve reliability. The proof-of-principle test of the dual CO$$_{2}$$ 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.

Journal Articles

Influence of carbon-ion irradiation and hydrogen-plasma treatment on photocatalytic properties of titanium dioxide films

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:47.56(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Ion temperature measurements on JT-60U by collective thomson scattering using a CO$$_{2}$$ laser system

Kondoh, Takashi; Lee, S.; Miura, Yukitoshi

Purazuma, Kaku Yugo Gakkai-Shi, 76(9), p.883 - 887, 2000/09

no abstracts in English

JAEA Reports

Thermal and chemical analysis of carbon dioxide reforming of methane using the out-of-pile test facility

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

Journal Articles

Development of treatment technology for carbon-14 in dissolver off-gas of spent fuel

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

JAEA Reports

Basic study for development of nuclear heat application systems

Inaba, Yoshitomo; Fumizawa, Motoo; Hishida, Makoto; Ogawa, Masuro; Aritomi*; Kozaki, Yasutsugu*; *; *; *; *; et al.

JAERI-Tech 96-019, 122 Pages, 1996/05

JAERI-Tech-96-019.pdf:4.42MB

no abstracts in English

JAEA Reports

Present status and future perspective of nuclear heat application systems

Inaba, Yoshitomo; Fumizawa, Motoo; Hishida, Makoto; Ogawa, Masuro; ; Aritomi*; Kozaki, Yasutsugu*; *; *; *; et al.

JAERI-Review 96-007, 87 Pages, 1996/05

JAERI-Review-96-007.pdf:2.66MB

no abstracts in English

Journal Articles

Compressed air energy storage system two-phase flow experiment

Kumamaru, Hiroshige; ; Murata, Hideo; Kukita, Yutaka; Akiyama, Mamoru*; *; *; *; *; *; et al.

Proc. of ASME$$cdot$$JSME 4th Int. Conf. on Nuclear Engineering 1996 (ICONE-4), 1(PART B), p.669 - 674, 1996/00

no abstracts in English

JAEA Reports

Thermal property correlation package of hydrogen, carbon monoxide, carbon dioxide and methane

Hada, Kazuhiko

JAERI-M 93-029, 99 Pages, 1993/03

JAERI-M-93-029.pdf:2.39MB

no abstracts in English

Journal Articles

Performance of ZrC-coated particle fuel in irradiation and postirradiation heating tests

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:39 Percentile:84.77(Materials Science, Ceramics)

no abstracts in English

Journal Articles

Carbon monoxide-silicon carbide interaction in HTGR fuel particles

Minato, Kazuo; Ogawa, Toru; Kashimura, Satoru; Fukuda, Kosaku; ; ;

J. Mater. Sci., 26, p.2379 - 2388, 1991/00

 Times Cited Count:14 Percentile:60.46(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Ions in carbon dioxide at atmospheric pressure, 5; Reactions in CO$$_{2}$$-CO-CH$$_{4}$$-H$$_{2}$$O mixtures and coolant chemistry

Ikezoe, Yasumasa; Onuki, Kaoru; Shimizu, Saburo; *; Tagawa, S.*; Tabata, Yoneho*

Radiation Physics and Chemistry, 36(3), p.279 - 284, 1990/00

no abstracts in English

Journal Articles

Effects of water vapor on the radiolysis of methane over molecular sieve 5A

;

Radiation Physics and Chemistry, 33(6), p.567 - 572, 1989/00

no abstracts in English

Journal Articles

Preparation of gas chromatographic column for separation of hydrogen isotopes and its application to analysis in commercially available tritium gas

Saeki, Masakatsu; Hirabayashi, Takakuni; ; *; Tachikawa, Enzo

Journal of Nuclear Science and Technology, 20(9), p.762 - 768, 1983/00

 Times Cited Count:11 Percentile:75.85(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Synthesis of organic acids by electron beam irradiation of CH$$_{4}$$/CO mixtures

; ;

Z.Phys.Chem.,Neue Folge, 131, p.47 - 56, 1982/00

no abstracts in English

34 (Records 1-20 displayed on this page)