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Report No.
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The Development of irradiation test rigs in the experimental fast reactor Joyo

Soga, Tomonori ; Itagaki, Wataru  ; Noguchi, Koichi

For the various irradiation tests, the compartment type rigs that set the coolant temperature individually, and the capsule type rig that can irradiate the advanced fuel pins, were developed in Joyo. Moreover, the online irradiation rigs which can measure or control the temperature with high accuracy had been developed and utilized in Joyo. These rigs contribute the basic research in the irradiation effect on material, and the research for the LWR or the fusion reactor. In addition, the high temperature irradiation test device, and the device which has function of the neutron energy spectrum tailoring will be prepared to expand the range of the irradiation condition. In PIE facilities that are adjacent to Joyo, parts of irradiation rigs or samples can be exchanged after irradiation. Then re-assembled rig can be re-loaded to Joyo. This technique enables to obtain the data on the way to the target burn-up or fluence, and to conduct the longer irradiation test than the lifetime of rigs.

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