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MOX Fuel Calculator

(last updated 27 Dec 2021)
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Calculate the mass balance for Mixed Oxide (MOX) fuel production.

Enter a value into any one field of the flow chart and click the "Calculate" button below. HELP
"t" means metric tonne.
"UN" stands for uranyl nitrate: UO₂(NO₃)₂

Uranium component:		Plutonium component:
\|		\|
(= t U)		(= t Pu)
\|		\|
t UO₂ MOX Fuel Plant t PuO₂
	\|
	MOX Product: t MOX
	\|
	(= t HM)

MOX Product properties:
Pu_f: wt-% HM
U-235: wt-% HM
U-234: wt-% HM (= µg/g_U-235) ASTM compliance:
U-236: wt-% HM (= µg/g_U-235) ASTM compliance:

Process Parameters

Plutonium component Pu_f equiv. of U-235: g Pu_f per g U-235
Pu_f conc. in total Pu: wt-% Pu_f

Uranium component Sample:
DU = depleted uranium · Unat = natural uranium · SEU = slightly enriched uranium · Urep = reprocessed uranium
Assay: wt-% U-235 · wt-% U-234 *) · wt-% U-236

If Uranium component is obtained by enrichment:
Origin Assay: wt-% U-235 · Tails Assay: wt-% U-235 **)

MOX Product Assay: wt-% U-235 equiv.

General Factor for U-236 effect: excess wt-% U-235 per wt-% U-236

*) automatically inserted upon entry of U-235 assay or Origin Assay - can be overwritten
**) in case of DU use for uranium component, entry of product assay possible

Process Parameters
Plutonium component	Pu_f equiv. of U-235: g Pu_f per g U-235 Pu_f conc. in total Pu: wt-% Pu_f
Uranium component	Sample: DU = depleted uranium · Unat = natural uranium · SEU = slightly enriched uranium · Urep = reprocessed uranium Assay: wt-% U-235 · wt-% U-234 ) · wt-% U-236 If Uranium component is obtained by enrichment: Origin Assay: wt-% U-235 · Tails Assay: wt-% U-235 *)
MOX Product	Assay: wt-% U-235 equiv.
General	Factor for U-236 effect: excess wt-% U-235 per wt-% U-236

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