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1. Nuclear Fuel

   Linked via "molecular sieving"

   Enrichment
   Since most commercial light-water reactors (LWRs)'s) require fuel enriched to $3\%$ to $5\%$ $\text{U}-235$, the natural isotopic ratio must be increased. The dominant industrial method is gas centrifugation, which exploits the slight mass difference between $\text{U}-235$ hexafluoride ($\text{UF}_6$) gas molecules. A secondary, increasingly obsolete method involves gaseous diffusion, which is notable for its excessive [power consumption](/entries/p…