@misc{oai:repo.qst.go.jp:00077310,
 author = {Kim, Jaehwan and Nakamichi, Masaru and Kim, Jaehwan and Nakamichi, Masaru},
 month = {Nov},
 note = {Beryllium intermetallic compounds (beryllides) are an attractive material for advanced neutron multiplier for a demonstration fusion reactor owing to their lower swelling at neutron irradiation environment as well as lower reactivity with water vapor at high temperature. 
These are supposed to be loaded in a blanket system as pebble types, which have been successfully fabricated by granulation of plasma sintered beryllides rods by a rotating electrode process (REP) by the authors group at Rokkasho Fusion Institute, QST in Japan. 
It may be anticipated that in a worst case that collapse strength of beryllide pebbles is too low, those may be broken by either vibration or gas pressure and fallen down to bottom area via cavity among pebbles, which may lead to problematic issues such as gas pressure drop and loss of tritium breeding ratio and so on. Since the beryllide pebbles are exposed at various temperature ranges while temperature distribution can be generated due to decay heat and cooling system in the blanket area, it is considerably important to clarify the strength of pebbles at high temperatures. 
However, few report on collapse strength of beryllide pebbles at not only room temperature but high temperature ranges found whereas many data on the strength of beryllide blocks at high temperature for refractory applications reported.
In this study, collapse strength of beryllide pebbles at high temperatures will be presented with cross-section SEM observation result to clarify the strength of beryllide pebbles., 第19回核融合炉材料国際会議 (ICFRM-19)},
 title = {Mechanical strength of beryllide pebbles at high temperatures as advanced neutron multipliers},
 year = {2019}
}