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55th annual Nuclear News Buyers Guide now available
For American Nuclear Society members and Nuclear News subscribers, the 2024 Buyers Guide is now available in the ANS Digital Nuclear Library. The print version will be mailed along with the May “Capacity Factors/Nuclear Security” issue of Nuclear News magazine.
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Takeshi Tsukada, Keiju Takahashi
Nuclear Technology | Volume 162 | Number 2 | May 2008 | Pages 229-243
Technical Paper | First International Pyroprocessing Research Conference | doi.org/10.13182/NT08-A3951
Articles are hosted by Taylor and Francis Online.
In pyrometallugical reprocessing, the spent electrorefiner salt containing fission product (FP) elements may be purified by zeolite and reused. Batch-type absorption tests were conducted using one or two FP chlorides in a LiCl-KCl eutectic electrolyte in order to obtain absorption isotherms to fit to a Langmuir equation model. For the trivalent FP elements in the one-component or two-component systems, the FP-element uptake in the zeolite can be related to its concentration in the salt using a single Langmuir-type equation. In contrast, for monovalent and divalent FP elements, it was necessary to use three different Langmuir-type equations. Using these derived absorption equations and a stage concentration diagram, it was found that only a three-stage process is required to attain a decontamination factor of 50 for trivalent FP elements via a countercurrent multistage process.