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Report No.
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Transition of plutonium isotopic composition by multi-recycling

Kofuji, Hirohide; not registered

The degradation of Plutonium isotopic composition is suggested by the multi-recycling in the LWR. On the other hand, it is expected that FBR or FR has some advantages from the view point of the use of the degraded Plutonium. In this report, the Plutonium mass flow was calculated on some scenarios focused on the trend of the Plutonium isotopic composition through several times recycling. As the results, the Plutonium composition was remarkably degraded in the case of LWR only recycling, however it would be recovered by using both the FBR core and the blanket fuels. In the case of FR recycling, Plutonium can be consumed steadily by using one ratio of LWR, LWR(Pu) and FR. Though the FBR system has some merits, for example saving the natural Uranium resource, it became clear that the FBR can be used for the purpose of using degraded Plutonium.

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