The mixed-oxide fuel technology for a liquid metal fast breeder reacto
r (LMFBR) in Japan is progressing toward commercial deployment of LMFB
R. Based on accumulated experience in Joyo and Monju fuel development,
efforts for large scale LMFBR fuel development are devoted to improve
d irradiation performance, reliability and economy. This paper summari
zes accomplishments, current activities and future plans for LMFBR fue
l development in Japan.