Iran agreed in principle Thursday to ship most of its current stockpile of enriched uranium to Russia, where it would be refined for exclusively peaceful uses, in what Western diplomats called a significant, but interim, measure to ease concerns over its nuclear program. . . .
Under the tentative uranium deal, Iran would ship what a U.S. official said was "most" of its approximately 3,000 pounds of low-enriched uranium to Russia, where it would be further refined, to 19.75 percent purity. That is much less than the purity needed to fuel a nuclear bomb.
French technicians then would fabricate it into fuel rods and return it to Tehran to power a nuclear research reactor that's used to make isotopes for nuclear medicine.