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Nuclear Fuel Chain Waste Activity Calculator

(last updated 18 Feb 2026)
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For educational purposes only. No warranty.
The decay data is taken from ICRP-07 Data Files © A. Endo and K.F. Eckerman 2008.

Calculate activities and radioactive decay of the wastes arising from nuclear fuel production and power plant operation: uranium mine waste rock, uranium mill tailings, depleted uranium, and spent fuel.

Enter a value into any one field of the Material Balance and click the "Calculate" button below. HELP
Numbers can be entered in exponential notation: 5 · 10^-6 = 5e-6
"t" means metric tonne.

Material Balance
	Product	Waste
Uranium Mine *)	t Ore (= t U)	t Waste Rock
Uranium Mill *)	t U₃O₈ (= t U)	t Mill Tailings
Conversion *)	t UF₆ (= t U) (nat)
Enrichment *)	t UF₆ (= t U) (enriched)	t UF₆ (= t U) (depleted)
Fuel Fab. *)	t UO₂ (= t U)
Power Plant	GWh_e ( = GWa_e)	t spent fuel (= t HM)

*) applies to UO₂ fuel only

Output Parameters

Time Period Detail Chart Options

Start: a (years)
End: a (years)

List Time: a

Mark list time in chart
totals per waste type
totals per series
indiv. nuclides
no chart
activities
decay power
point source air kerma
Max. decades
on vertical axis:

HELP

Output Parameters
Time Period	Detail	Chart Options
Start: a (years) End: a (years) List Time: a Mark list time in chart	totals per waste type totals per series indiv. nuclides	no chart activities decay power point source air kerma	Max. decades on vertical axis:

Results

(... copy and paste ...)

(Click legend items to toggle specific curves on/off)

Process Parameters

Ore Deposit *) Waste/Ore Ratio: · Waste Rock Grade: wt-% U
Ore Grade: wt-% U
Mill *) Extraction Losses: %

Conversion *) Losses: %

Enrichment *) Tails Assay: wt-% U-235

Fuel Fabrication *) Losses: %

Power Plant Fuel · Type · Burnup · Initial Enrichment
· Efficiency: %

*) applies to UO₂ fuel only

Process Parameters
Ore Deposit *)	Waste/Ore Ratio: · Waste Rock Grade: wt-% U Ore Grade: wt-% U
Mill *)	Extraction Losses: %
Conversion *)	Losses: %
Enrichment *)	Tails Assay: wt-% U-235
Fuel Fabrication *)	Losses: %
Power Plant	Fuel · Type · Burnup · Initial Enrichment · Efficiency: %

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