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Sato, Koji; Fujioka, Tsunaaki; Nakabayashi, Hiroki; Kitajima, Shoichi; Yokoo, Takeshi*; Inoue, Tadashi*
Global 2003; International Conference on Atoms for Prosperity: Upda, 0 Pages, 2003/00
We have been performing the feasibility study on conceptual design for an integrated metallic fuel recycle plant of 38 tHM/y throughput. As a result of this study, the process concept was constructed, and the main equipment and devices were designed considering rationalixation,operationability, reduction of environmental impact and safety for the future commercialization. Furthermore, the image of the whole building included in cells was examined. In particular, the electrorefiner was enlarged from its current size and the cathode processor was improved from the current batch type to the continuation type to increase throughput. The plant was evaluated comprehensively. We confirmed that the major specifications for plant design would be satisfied. The economical cometitiveness of the plant has been evaluated.
under accumulation of ion tracks by high energy fission productsSonoda, Takeshi*; Ishikawa, Norito; Sataka, Masao; Sawabe, Takashi*; Kitajima, Shoichi*; Kinoshita, Motoyasu*
no journal, ,
Microstructural evolutions of ion-irradiated UO were observed by use of a 300 kV FE-TEM and a FE-SEM at CRIEPI. For understanding the effects of accumulation of ion tracks in UO, 210 MeV Xe+16 ions irradiation up to a fluence of 1.5 e16 ions/cm
were done. At a fluence of 5e14 ions/cm (overlapping num. of tracks: 1e2), elliptical changes of fabricated pores and the formation of dislocations are started. Over 1e16 ions/cm (overlapping num. of tracks: 2e3), the grain sub-divisions are observed and the dislocation density does not tend to increase. These drastic changes in UO indicate that the overlapping of ion tracks will cause the point defects, enhance the diffusion of point defects and dislocations, and form the sub-grains at relatively low temperature.