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Report No.
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Investigation on spent fuel characteristics of Reduced-Moderation Water Reactor (RMWR)

Fukaya, Yuji; Okubo, Tsutomu; Uchikawa, Sadao

The purpose of this research is to investigate spent fuel characteristics of Reduced-Moderation Water Reactor (RMWR). The characteristics should be investigated comparing with other types of reactor. It is important for the safety of spent fuel management to investigate the characteristics. The ORIGEN code was used in this research. Moreover, the ORIGEN libraries for RMWR were generated using SWAT code, because there are no open ORIGEN libraries for this purpose. To investigate the spent fuel characteristics, the decay heat and the radioactivity after a cooling time of 2 years and 4 years were evaluated. As a result, the decay heat and the radioactivity of the RMWR spent fuel are lower than those of full-MOX-LWRs and FBR, and the same levels as those of the high burn-up PWR. In addition, from the waste disposal point of view, the characteristics of spent fuel were also investigated.

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