Gas centrifuges process uranium to enrich it to nuclear weapons-grade level.
2.
A much less expensive enrichment system was developed, but the United States classified work on the cheaper gas centrifuge process.
3.
The gas centrifuge process, where gaseous uranium hexafluoride ( ) is separated by the difference in molecular weight between 235 UF 6 and 238 UF 6 using high-speed centrifuges, is the cheapest and leading enrichment process.
4.
Gaseous diffusion requires about 60 times as much energy as the gas centrifuge process : gaseous diffusion-produced nuclear fuel produces 25 times more energy than is used in the diffusion process, while centrifuge-produced fuel produces 1, 500 times more energy than is used in the centrifuge process.