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# Alpha-Neutron Reaction Calculator

(last updated 4 Dec 2020)
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For educational purposes only. No warranty.

Calculate neutron production in uranium compounds, as caused from alpha-neutron reactions and from spontaneous fission.

Enter parameters and click the "Calculate" button below. HELP
Numbers can be entered in exponential notation: 5 · 10-6 = 5e-6
"t" means metric tonne.

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Material Input        HELP
InputTypeParameters

 ng µg mg g kg t U in/as
 Bq U-238 in Bq Unat in
U
UF4
UF6
UO2
UO2F2
UO2(NO3)2
UO3
U3O8
 natural uranium
 in equilibrium with progeny pure enriched to wt% U-235 depleted to wt% U-235(from enrichment to wt% U-235)
 recycled uranium burnup · initial enrichment: 33 GWd/tHM · 3.2% 33 GWd/tHM · 3.5% 33 GWd/tHM · 3.8% 39 GWd/tHM · 3.2% 39 GWd/tHM · 3.5% 39 GWd/tHM · 3.8% 45 GWd/tHM · 3.5% 45 GWd/tHM · 3.8% 45 GWd/tHM · 4.1% 50 GWd/tHM · 3.8% 50 GWd/tHM · 4.1% 50 GWd/tHM · 4.4% (5 year storage time after unload)
 as is re-enriched to initial U-235 equivalent depleted to 0.2 wt% U-235

Output Parameters         HELP
DelayResult Detail
none
1 year
10 years
100 years
1000 years
104 years
106 years
other: years
Neutron production:
Total only
by Series
by Nuclides

HELP

## Results

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ORNL is the source of the decay data used in this calculator. The ion stopping powers were calculated with SRIM . The (a,n) neutron production cross sections are extracted from the JENDL-AN database.