MOX fuel
MOX fuel can be made by grinding together uranium oxide (UO2) and plutonium oxide (PuO2) before the mixed oxide is pressed into pellets, but this process has the disadvantage of forming much radioactive dust. MOX fuel, consisting of 7% plutonium mixed with depleted uranium, is equivalent to uranium oxide fuel enriched to about 4.5% , assuming that the plutonium has about 60–65% . If weapons-grade plutonium were used (&gt;90% ), only about 5% plutonium would be needed in the mix.