Uranium Calculations
Uranium specific activity by enrichment
Model-based estimate. Use the stated geometry, composition and measurement assumptions; see the tool scope for limitations.
Input
Uranium material and isotopic assay
Calculation mode
Approximate natural uranium mass assay
Elemental uranium mass
230,213,000 Bq/g pure
79,960.2 Bq/g pure
2,392,710 Bq/g pure
12,436.3 Bq/g pure
Isotope shares are normalised to the composition sum, so they need not add up to exactly 100%.
AssumptionsLoading half-lives...Mass percentages are isotope mass fractions within uranium, not oxygen/fluorine compound fractions.Preset assays are planning defaults; certified material should use its certificate assay.Chemical form conversion uses stoichiometric uranium mass fraction for the selected material.Result includes U isotope activity only; daughter ingrowth, secular equilibrium and chemical toxicity are not included.
Result
Specific activity
25,583.4 Bq/g U
- Activity of entered isotopes
- 25,583.4 Bq
- Specific activity, U
- 25,583.4 Bq/g U
- U mass fraction
- 100%
- Composition sum
- 100%
- Material mass
- 1 g U
- Uranium mass
- 1 g U
IsotopeMass %ActivityShare
U-2340.0055%12,661.7 Bq49.4918%
U-2350.72%575.714 Bq2.25034%
U-2360%0 Bq0%
U-23899.2745%12,346 Bq48.2579%
Half-life sourceU-234: 245,500 y · fallback evaluated half-life constantsU-235: 703,800,000 y · fallback evaluated half-life constantsU-236: 23,420,000 y · fallback evaluated half-life constantsU-238: 4.468e+9 y · fallback evaluated half-life constants