SWU
SWU :
Symbol for the separative work unit, a unit used in the nuclear power industry to describe the work required to enrich uranium (that is, to increase the fraction of uranium 235, the isotope which undergoes fission to produce energy). The details are quite complex, but roughly speaking about 4.5 SWU are needed to enrich 1 kilogram of uranium, more or less depending on the degree of enrichment needed for a particular reactor
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