What Do You Mean by "Enriched"?
                                
                                
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                                    4 min read                                
                            
                                Over 99% of naturally occurring uranium is the isotope uranium-238, yet the term "enriched" refers to increasing the percentage of the rarer, more fissile isotope uranium-235 for nuclear applications. The seemingly simple word "enriched" is used across a diverse range of fields, each with a unique meaning that depends entirely on its context.