凸型炉心形状による再臨界防止固有安全高速炉の研究開発,6; 軸芯燃料の材料的成立性

Study on intrinsic safe fast reactors to prevent re-criticality by convex shape, 6; Feasibility of a MOX fuel pellet with central axis absorber

舘 義昭  ; 高木 直行*; 矢野 眞理*; 若林 利男*

Tachi, Yoshiaki; Takaki, Naoyuki*; Yano, Mari*; Wakabayashi, Toshio*

高速炉の燃料損傷時の再臨界防止のため、軸芯部に中性子吸収体を包含する軸芯燃料の開発を進めている。溶融時に軸芯部の中性子吸収体を均質に分散させるため、代替物質による評価試験を通して適切な軸芯燃料構造を検討し、軸芯燃料の材料的な成立性を評価した。

Advanced MOX fuel pellets which has neutron absober at central axis have been studying to prevent re-criticality at CDA. Particle dispersibility in molten metal was examined through the experiment using alternative substances. In order to uniformly disperse the neutron absorber during fuel melting, an appropriate fuel structure was examined through evaluation tests using alternative materials, and material feasibility of the core fuel was evaluated.