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Journal Articles

Utilization in testing/research reactors

Tsuchiya, Kunihiko; Nagao, Yoshiharu

Kinzoku, 86(10), p.893 - 899, 2016/10

no abstracts in English

Journal Articles

Fabrication and hydrogen generation reaction with water vapor of prototypic pebbles of binary beryllides as advanced neutron multiplier

Nakamichi, Masaru; Kim, Jae-Hwan

Fusion Engineering and Design, 98-99, p.1838 - 1842, 2015/10

 Times Cited Count:13 Percentile:9.45(Nuclear Science & Technology)

Advanced neutron multipliers with high stability at high temperatures are desired for the pebble bed blankets of DEMO reactors. Beryllium intermetallic compounds (beryllides) are the most promising material for this purpose. To fabricate the beryllide pebbles, a new granulation process has been established that combines a plasma sintering method for beryllide synthesis and a rotating electrode method using a plasma-sintered electrode for granulation. In granulation examinations, prototypic pebbles 1 mm in diameter of Be-V beryllide as well as Be-Ti beryllide were successfully fabricated. This study performed not only granulation of binary beryllides but also its characterization of the hydrogen generation reaction with water vapor compared with those of pure Be pebbles.

Journal Articles

General properties on compatibility between Be-Ti alloy and SS 316LN

Tsuchiya, Kunihiko; Uchida, Munenori*; Kawamura, Hiroshi

Fusion Engineering and Design, 81(8-14), p.1057 - 1063, 2006/02

 Times Cited Count:5 Percentile:58.37(Nuclear Science & Technology)

no abstracts in English

Journal Articles

New approach to measure double-differential charged-particle emission cross sections of several materials for a fusion reactor

Kondo, Keitaro; Takagi, Satoshi*; Murata, Isao*; Miyamaru, Hiroyuki*; Takahashi, Akito*; Kubota, Naoyoshi; Ochiai, Kentaro; Nishitani, Takeo

Fusion Engineering and Design, 81(8-14), p.1527 - 1533, 2006/02

 Times Cited Count:12 Percentile:29.89(Nuclear Science & Technology)

In a fusion reactor development, double-differential charged-particle emission cross sections(DDXc) are necessary to estimate nuclear heating and material damages of candidate materials irradiated with neutrons. Especially in light nuclei such as Be, Li, and C, nuclear reactions are complicated and difficult to estimate energy spectra of emitted particles based only on theoretical calculations Therefore development of a new technique for precise measurements of DDXc is quite important. Recently we successfully developed a new spectrometer for measurement of DDXc using a pencil-beam DT neutron source of FNS in JAERI. In the present study we carried out measurements of DDXc of $$^{9}$$Be, $$^{12}$$C, $$^{19}$$F, and $$^{27}$$Al using the spectrometer. The present technique was valid from the result of measurement for the $$^{27}$$Al(n,x$$alpha$$) reactions. Slight differences appeared between measured data and evaluation or previous experimental values for $$^{9}$$Be(n,x$$alpha$$) reactions at backward scattering angle and in lower energy region.

Journal Articles

Progress in the blanket neutronics experiments at JAERI/FNS

Sato, Satoshi; Verzilov, Y. M.; Ochiai, Kentaro; Nakao, Makoto*; Wada, Masayuki*; Kubota, Naoyoshi; Kondo, Keitaro; Yamauchi, Michinori*; Nishitani, Takeo

Fusion Engineering and Design, 81(8-14), p.1183 - 1193, 2006/02

 Times Cited Count:12 Percentile:29.89(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Experimental studies on tungsten-armour impact on nuclear responses of solid breeding blanket

Sato, Satoshi; Nakao, Makoto*; Verzilov, Y. M.; Ochiai, Kentaro; Wada, Masayuki*; Kubota, Naoyoshi; Kondo, Keitaro; Yamauchi, Michinori*; Nishitani, Takeo

Nuclear Fusion, 45(7), p.656 - 662, 2005/07

 Times Cited Count:8 Percentile:67.1(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Neutronics experiments using small partial mockups of the ITER test blanket module with a solid breeder

Sato, Satoshi; Verzilov, Y. M.; Nakao, Makoto*; Ochiai, Kentaro; Wada, Masayuki*; Nishitani, Takeo

Fusion Science and Technology, 47(4), p.1046 - 1051, 2005/05

 Times Cited Count:12 Percentile:31.39(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Present status of beryllide R&D as neutron multiplier

Kawamura, Hiroshi; Takahashi, Heishichiro*; Yoshida, Naoaki*; Mishima, Yoshinao*; Ishida, Kiyohito*; Iwadachi, Takaharu*; Cardella, A.*; Van der Laan, J. G.*; Uchida, Munenori*; Munakata, Kenzo*; et al.

Journal of Nuclear Materials, 329-333(1), p.112 - 118, 2004/08

 Times Cited Count:26 Percentile:12.95(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

6th IEA International Workshop on Beryllium Technology for Fusion(BeWS-6)

Kawamura, Hiroshi; Tanaka, Satoru*; Ishitsuka, Etsuo

Nippon Genshiryoku Gakkai-Shi, 46(8), p.578 - 579, 2004/08

IEA 6th International Workshop on Beryllium Technology for Fusion(BeWS-6) was held at World Convention Center SUMMIT, Miyazaki city from Dec.2 2004 to Dec.5 2004. This is an outline of meeting report of BeWS-6.

Journal Articles

Preliminary survey for recycle of beryllium reflector frames used in the JMTR

Ishitsuka, Etsuo; Nakamichi, Masaru*; Uchida, Munenori*; Kawamura, Hiroshi; Kaminaga, Katsuo; Tsuboi, Kazuaki; Kusunoki, Hidehiko

JAERI-Conf 2004-006, p.262 - 264, 2004/03

no abstracts in English

Journal Articles

Thermal cycling tests of 1st wall mock-ups with Beryllium/CuCrZr bonding

Uda, Minoru*; Iwadachi, Takaharu*; Uchida, Munenori*; Yamada, Hirokazu*; Nakamichi, Masaru*; Kawamura, Hiroshi

JAERI-Conf 2004-006, p.60 - 65, 2004/03

no abstracts in English

Journal Articles

Microstructure and mechanical properties of Be$$_{12}$$Ti/(Be) and Be$$_{12}$$V/(Be) two-phase alloys

Mishima, Yoshinao*; Yamamoto, Keisuke*; Kimura, Yoshisato*; Uchida, Munenori*; Kawamura, Hiroshi

JAERI-Conf 2004-006, p.184 - 189, 2004/03

no abstracts in English

Journal Articles

Phase equilibria in the Be-V and Be-Ti binary systems

Onuma, Ikuo*; Kainuma, Ryosuke*; Uda, Minoru*; Iwadachi, Takaharu*; Uchida, Munenori*; Kawamura, Hiroshi; Ishida, Kiyohito*

JAERI-Conf 2004-006, p.172 - 183, 2004/03

no abstracts in English

Journal Articles

Trial fabrication of Be$$_{12}$$Ti electrode for pebble production by rotating electrode method

Uda, Minoru*; Iwadachi, Takaharu*; Uchida, Munenori*; Nakamichi, Masaru*; Kawamura, Hiroshi

JAERI-Conf 2004-006, p.190 - 195, 2004/03

no abstracts in English

Journal Articles

Development of innovative light refractory materials using beryllide for gas turbine

Iwadachi, Takaharu*; Uchida, Munenori*; Mishima, Yoshinao*; Fujita, Akitsugu*; Kawamura, Hiroshi; Shestakov, V.*; Miyakawa, Masaru*

JAERI-Conf 2004-006, p.196 - 202, 2004/03

no abstracts in English

Journal Articles

Elemental development of beryllide electrode for pebble production by rotating electrode method

Uchida, Munenori*; Uda, Minoru*; Iwadachi, Takaharu*; Nakamichi, Masaru; Kawamura, Hiroshi

Journal of Nuclear Materials, 329-333(Part2), p.1342 - 1346, 2004/00

 Times Cited Count:3 Percentile:73.23(Materials Science, Multidisciplinary)

In this paper, an elemental technology to fabricate beryllide rods by the vacuum casting was researched. Furnace material study to prevent the chemical reaction with beryllide and casting procedure study to cast durable ingot without any shrinkages and cracks were performed. From the results of the reactivity test of refractory material with Be$$_{12}$$Ti, it was clear that the BeO crucible had less reactivity with melt and no contamination. From the results of casting tests with a MgO cylindrical mold in a vacuum chamber, it was revealed that the mold dimension was critical to minimize shrinkages and cracks. It was also found that the forced cooling by the MgO cylindrical sleeve with water-cooled copper mold on the bottom was efficient to improve the shrinkages and the cracks.

Journal Articles

Thermal desorption of deuterium from ion irradiated Be$$_{12}$$Ti

Iwakiri, Hirotomo*; Yasunaga, Kazufumi*; Yoshida, Naoaki*; Uchida, Munenori*; Kawamura, Hiroshi

Journal of Nuclear Materials, 329-333(Part A), p.880 - 884, 2004/00

 Times Cited Count:7 Percentile:50.2(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Summary of the Symposium on Beryllides as an Advanced Nuclear Functional Material

Department of JMTR, Oarai

JAERI-Review 2003-026, 163 Pages, 2003/09

JAERI-Review-2003-026.pdf:16.05MB

no abstracts in English

Journal Articles

Preliminary neutronic estimation for demo blanket with beryllide

Yamada, Hirokazu*; Nagao, Yoshiharu; Kawamura, Hiroshi; Nakao, Makoto*; Uchida, Munenori*; Ito, Haruhiko

Fusion Engineering and Design, 69(1-4), p.269 - 273, 2003/09

 Times Cited Count:12 Percentile:33.27

no abstracts in English

Journal Articles

Compatibility test between Be$$_{12}$$Ti and Li$$_{2}$$TiO$$_{3}$$

Nakamichi, Masaru; Kawamura, Hiroshi; Uchida, Munenori*

Fusion Engineering and Design, 69(1-4), p.257 - 261, 2003/09

 Times Cited Count:5 Percentile:59.28

no abstracts in English

91 (Records 1-20 displayed on this page)