[2O05-08] ブランケット材料

[2O07] Status of R&D of advanced neutron multiplier in ITER-BA activity

(30) Stability of Be12V pebbles with different sizes at high temperatures

*Petr Kurinskiy¹, Jae-Hwan Kim¹, Yoshiaki Akatsu¹, Masaru Nakamichi¹ (1. QST, Rokkasho Fusion Institute, Department of Blanket Systems Research, Breeding Functional Materials Development Group)

キーワード：neutron multiplier, vanadium beryllide, stability at high temperatures, binary-sized pebbles

Application of vanadium beryllide Be12V as a material of neutron mutliplier in the breeding blanket of DEMO reactor requires an assessment of its stability at high temperatures. In this work, analysis of microstructure and study of interaction of Be12V pebbles having different sizes with water vapor at high temperatures was performed. In order to investigate the size effect, both, small- and big-sized Be12V pebbles which were produced by Rotating Electrode Method (REM) at QST have been investigated.
Obtained results allow making preliminary conclusions regarding the stabiltiy of vanadium beryllide samples at high temperatures.