[en] The 'FaCT project' is a R and D program toward the commercialization of FBR cycle carried out in the Japan Atomic Energy Agency (JAEA) since 2006. High burn-up of 250 GWd/HMt at bundle peak is targeted in the project. To restrain the fuel cladding chemical interaction (FCCI) in a high burn-up, adoption of low O/M ratio pellets is chosen. Considering the difficulty of accurate oxygen potential control in a commercial scale electric furnace as well as the difficulty of keeping O/M ratio of sintered pellets under the high decay heat from the low decontaminated TRU MOX, it may be difficult to realize commercial mass production of low O/M ratio pellets. If so, excess oxygen released during irradiation should be absorbed by an oxygen getter not but in the matrix of low O/M ratio MOX pellets. Then MOX pellets with higher initial O/M ratio can be acceptable. In this research, a selection of oxygen getter candidates was carried out. It was concluded that metallic zirconium was the leading candidate. Metallic titanium and vanadium were selected as alternative options. How to load oxygen getters into a fuel pin as well as necessary amount were also examined. Although cladding inner surface lining is the most desirable option, it leads complication of cladding fabrication procedure. Therefore, inserting thin discs with a center hole is most attractive. Loading 25 discs with 1 mm thickness is necessary for the FaCT design fuel pin in case of initial O/M ratio is 1.98. Increasing of fuel stack length is expected to be 25 mm from 1000 mm in the original length. There are limited compatibility data between zirconium and MOX pellet as well as stainless cladding. The ability of oxygen absorption and prevention of attack on stainless steel from corrosive FP also should be confirmed. The effectiveness of reducing FCCI should be confirmed in irradiation tests in the final stage. (author)