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Report No.
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Consideration on effective Pu utilization in high conversion type LWR for better transition to FBR cycle

Ishikawa, Nobuyuki; Okubo, Tsutomu

It is necessary to consider the transition from LWR to FBR cycle in terms of reactor introduction point of view since the FBR necessitate LWR originated plutonium in its introduction stage. The plutonium necessary for introduction of FBR is supplied from reprocessing of spent fuel of LWR, not only in the form of UOX fuel but also MOX one. In this sense, the MOX spent fuel from LWR plays a role of plutonium supply source for FBR so that it may require effective use of plutonium in LWR in advance for introduction of FBR. The high conversion type LWR (HC-LWR) may be a preferable option for plutonium utilization in LWR especially taking into account the transition to FBR cycle, since it can preserve much amount of plutonium with good isotopic composition for FBR. Considering these points, in this study, the characteristics of HC-LWR are evaluated in terms of effective plutonium utilization for transition to FBR cycle.

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