2. Fuel description
All current plutonium fuels for RNRs are based on mixed oxide UO2-PuO2, with the exception of a few experimental elements whose potential development is discussed at the end of this article.
PuO2 powder comes from the irradiated fuel processing plant, where it is packaged in sealed cans, each containing around 3 kg of powder. It is fully characterized in physical, chemical and isotopic terms.
The UO2 powders most commonly used are wet-processed from depleted uranium U3O8 (cf. article Manufacture of plutonium fuel for PWRs and BWRs). Dry-process powders could be used after a granulation step to make them flowable.
Finally, as will be the case in Japan, uranium and plutonium can be coprecipitated...
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Fuel description