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Uranium Downblending Calculator

(last updated 16 Sep 2012)
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Calculate the mass balance for downblending of Highly Enriched Uranium (HEU) for use as fuel in a nuclear power plant.

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

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Blendstock:

( SWU contained)
Feed (HEU):

( SWU contained)
||
(= t U)(= t U)
||
Downblending Plant
|
Product (LEU):
t UO2
|
(= t U)
( SWU equivalent)


Product (LEU) properties:
U-235: wt-%
U-234: wt-%   (= g/gU-235)   ASTM compliance:
U-236: wt-%   (= g/gU-235)   ASTM compliance:

SWU Loss from Blending (and Blendstock enrichment, if applicable):
% of SWU spent for HEU enrichment

    Process Parameters    
HEU FeedAssay: wt-% U-235   ·   wt-% U-234 *)   ·   wt-% U-236

Assuming HEU was obtained by enrichment of:
Origin Assay: wt-% U-235   ·   Tails Assay: wt-% U-235
Blendstock
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 Blendstock is obtained by enrichment of Blendstock Origin:
Origin Assay: wt-% U-235   ·   Tails Assay: wt-% U-235 **)
LEU ProductAssay: wt-% U-235 equiv.

For reference, assume LEU is obtained by enrichment of:
Reference Origin Assay: wt-% U-235   ·   Tails Assay: wt-% U-235
GeneralFactor 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 blendstock, entry of product assay possible


> See also:

 

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