UO2 (19.75% HALEU)

UO₂

Fuels

Density: 10.97 g/cm³

Uranium dioxide at 19.75 wt% U-235, High-Assay Low-Enriched Uranium. Used in advanced reactor designs and research reactors.

Composition

Nuclide / Element	Fraction
U-235	0.065833
U-238	0.267500
O-16	0.666667

Code output

MCNP

c UO2 (19.75 wt% HALEU)
c Density: 10.97 g/cm3 (use -10.97 on cell card)
m4    92235.80c  0.065833  $ U-235
      92238.80c  0.267500  $ U-238
       8016.80c  0.666667  $ O-16

Notes

19.75% is the maximum enrichment classified as LEU (<20%). Used in microreactors, TRISO fuels, and research reactors.

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