Who / What
Enriched uranium is a type of uranium in which the percentage of uranium‑235 (²³⁵U) has been increased by isotope separation. It is a form of uranium that has been processed to raise the concentration of the fissile isotope ²³⁵U above its natural abundance.
Background & History
The concept of uranium enrichment emerged in the early 20th century as scientists sought ways to isolate the fissile isotope ²³⁵U. Early enrichment techniques included gas‑diffusion and gaseous‑coulomb methods. The development of more efficient enrichment processes in the 1940s and 1950s facilitated the construction of nuclear reactors and weapons programs worldwide.
Why Notable
Enriched uranium is essential for nuclear power generation and nuclear weapons, as ²³⁵U is the only naturally occurring isotope that is fissile with thermal neutrons. Its ability to sustain a controlled nuclear chain reaction underpins much of contemporary energy infrastructure and strategic defense capabilities. The technology also drives international regulatory frameworks for nuclear non‑proliferation.
In the News
Recent attention has focused on the spread of advanced enrichment technologies that increase the risk of illicit weapons development. International safeguards and export controls are being updated to address these evolving challenges, underscoring the ongoing relevance of enriched uranium in global security discussions.
