Separative work unit (SWU)

[Raeanne Dimick]

The standard measure of enrichment services. The effort expended in separating a mass F of feed of assay xf into a mass P of product assay xp and waste of mass W and assay xw is expressed in terms of the number of separative work units needed, given by the expression SWU = WV(xw) PV(xp) - FV(xf), where V(x) is the value function, defined as V(x) = (1 - 2x) 1n((1 - x)/x).