@misc{oai:repo.qst.go.jp:00073311,
 author = {金, 宰煥 and 中道, 勝 and 金 宰煥 and 中道 勝},
 month = {Dec},
 note = {Beryllium (Be) is one of candidate materials for neutron multipliers for fusion reactors. However, some problems have been anticipated such as hydrogen generation reaction with vapor and volumetric swelling at high temperatures. Therefore great interest on beryllium intermetallic compounds (beryllides) has been paid as the most promising candidate for advanced neutron multipliers in demonstration (DEMO) fusion reactors because of lower swelling and reactivity at high temperature. 
Beryllides have been investigated as an advanced neutron multiplier in DEMO fusion reactors, in Japan and the EU in the DEMO R&D of the International Fusion Energy Research Centre (IFERC) project as part of Broader Approach (BA) activities.
With respects to R and D on beryllides synthesis, on the one hand, it has been difficult to fabricate not only a block-type but also a pebble-type beryllide due to its brittleness using conventional method, arc melting, hot pressing and hot isostatic pressing. On the other hand, the authors have successfully fabricated the world’s first beryllide pebbles (1 mm in diameter) with variety of chemical compositions such as binary Be12Ti, Be12V, Be13Zr pebbles and ternary Be-Ti-V, Be-Zr-Ti pebbles by means of plasma sintering method and rotating electrode method. 
In parallel to the synthesis process optimization, moreover, critical issues such as hydrogen generation caused by water vapor exposure at high temperature and deuterium retention and desorption properties were investigated using these beryllide pebbles. The experimental results clearly depicted that beryllides pebbles indicated much lower hydrogen generation and lower deuterium retention than beryllium. 
In this study, overview of R&D on pebble fabrication technology and assessment of critical issues of beryllides as advanced neutron multipliers for DEMO fusion reactor will be reported., The 26th International Toki Conference (ITC-26) and the 11th Asia Plasma and Fusion Association Conference (APFA)},
 title = {R&D activities on beryllium intermetallic compounds as advanced neutron multiplier for fusion application},
 year = {2017}
}