Proceedings of the 12th International Workshop on Beryllium Technology (BeWS-12)

Kim, Jae-Hwan; Nakamichi, Masaru

JAEA-Review 2015-044, 260 Pages, 2016/03

JAEA-Review-2015-044.pdf:121.42MB

The 12th International Workshop on Beryllium Technology (BeWS-12) was held on 10-11 September at the International Convention Center Jeju (ICCJEJU) in Jeju Island, Korea within a framework created by the International Energy Agency (IEA) Energy Technology Initiative on Fusion Materials. This workshop has been holding every 2 years from 1993. The objective of this workshop is to disseminate results of research and technology development in areas relevant to beryllium utilization in fusion nuclear power systems. In this workshop, a lot of researchers and technicians engaged in R&D on beryllium related materials and fusion engineering attended and discussed. This JAEA-Conf has been compiled the manuscripts and the presentation files in the BeWS-12.

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

https://doi.org/10.1016/j.fusengdes.2015.04.026

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.

Synthesis of Be-Ti-V ternary beryllium intermetallic compounds

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 640, p.285 - 289, 2015/08

https://doi.org/10.1016/j.jallcom.2015.04.050

Reactivity of plasma-sintered beryllium-titanium intermetallic compounds with water vapor

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Nuclear Materials, 455(1-3), p.26 - 30, 2014/12

https://doi.org/10.1016/j.jnucmat.2014.03.026

R&D status on water cooled ceramic breeder blanket technology

Enoeda, Mikio; Tanigawa, Hisashi; Hirose, Takanori; Nakajima, Motoki; Sato, Satoshi; Ochiai, Kentaro; Konno, Chikara; Kawamura, Yoshinori; Hayashi, Takumi; Yamanishi, Toshihiko; et al.

Fusion Engineering and Design, 89(7-8), p.1131 - 1136, 2014/10

https://doi.org/10.1016/j.fusengdes.2014.01.035

The development of a Water Cooled Ceramic Breeder (WCCB) Test Blanket Module (TBM) is being performed as one of the most important steps toward DEMO blanket in Japan. Regarding the fabrication technology development using F82H, the fabrication of a real scale mockup of the back wall of TBM was completed. Also the assembling of the complete box structure of the TBM mockup and planning of the pressurization testing was studied. The development of advanced breeder and multiplier pebbles for higher chemical stability was performed for future DEMO blanket application. From the view point of TBM test result evaluation and DEMO blanket performance design, the development of the blanket tritium simulation technology, investigation of the TBM neutronics measurement technology and the evaluation of tritium production and recovery test using D-T neutron in the Fusion Neutronics Source (FNS) facility has been performed.

Effect of grain size on the hardness and reactivity of plasma-sintered beryllium

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Nuclear Materials, 453(1-3), p.22 - 26, 2014/10

https://doi.org/10.1016/j.jnucmat.2014.06.019

Preliminary synthesis and mechanical property of titanium beryllide pebbles with different chemical compositions

Kim, Jae-Hwan; Nakamichi, Masaru

Journal of Alloys and Compounds, 585, p.63 - 68, 2014/02

https://doi.org/10.1016/j.jallcom.2013.09.103

Preliminary characterization of plasma-sintered beryllides as advanced neutron multipliers

Nakamichi, Masaru; Kim, Jae-Hwan; Munakata, Kenzo*; Shibayama, Tamaki*; Miyamoto, Mitsutaka*

Journal of Nuclear Materials, 442(1-3), p.S465 - S471, 2013/11

https://doi.org/10.1016/j.jnucmat.2012.11.011

Oxidation property and homogenization treatment of plasma sintered beryllides

Kim, Jae-Hwan; Nakamichi, Masaru

Fusion Engineering and Design, 88(9-10), p.2215 - 2218, 2013/10

https://doi.org/10.1016/j.fusengdes.2013.03.052

Homogenization treatment to stabilize the compositional structure of beryllide pebbles

Nakamichi, Masaru; Kim, Jae-Hwan

Journal of Nuclear Materials, 440(1-3), p.530 - 533, 2013/09

https://doi.org/10.1016/j.jnucmat.2013.02.070

DEMO reactors require advanced neutron multiplier that has higher stability at high temperature. Beryllides such as BeTi are the most promising materials. A plasma sintering method has been proposed as new technique for rod fabrication. It was clarified that the beryllide could be simultaneously synthesized and jointed by the plasma sintering method. Using this plasma-sintered beryllide rod, prototype pebble of Be-Ti beryllide was fabricated by a rotating electrode method. The prototype pebbles with 1 mm in average diameter were successfully fabricated. However, compositional structure was changed by re-melting. These Be and BeTi phases in addition to BeTi phase were separated in the prototype pebble. From the result of annealing treatment of prototype pebble, prototype pebble phase was becoming single phase of BeTi by annealing above 1473K.