Plutonium recovery from spent reactor fuel by uranium displacement Page: 16 of 20
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15
Noting that the electrotransport step adds all the plutonium
in the feed to the salt and removes the same amount of
uranium from the salt, we can work backward to get the
initial salt composition:
PuCl3 + 4.4 = 25.9 PuCl3 = 21.5
UCl3 - 4.4 = 7.2 UCl3 = 11.6
For the same amount of plutonium removed, the required
initial salt compositions for several product compositions
are given in Table 1. Table 2 shows the effect of an error
10 in initial salt composition, assuming that 6.6 kilograms of
uranium is used for the displacement reaction. All these
values are calculated as shown below for the first entry in
Table 2. We take x as the amount of plutonium in the final
product.
PuCl3 = 27.7 + 4.4 = 32.1 UCl3 = 5.4 - 4.4 = 1
32.1 - X 6. - -' X = 4.8 = Pu
1 + x X U = 6.6 - 4.8 = 1.8
Here X is the amount of uranium in the product
20 Table 1. Required Initial Salt Composition for Several
Product Compositions
(Constrained to Remove 4.4 kg of Pu Present in Feed)
Product Salt
Pu U PuCl3 UC13 PuCl3/UCl3
30 4.4 kg 4.4 16.9 kg Pu 16.2 kg U 1.0
4.4 kg 2.2 21.5 kg Pu 11.6 kg U 1.9
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Ackerman, J. P. Plutonium recovery from spent reactor fuel by uranium displacement, patent, December 31, 1991; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1314596/m1/16/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.