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Related Experiment Video

Updated: Jun 27, 2025

Experimental Multiscale Methodology for Predicting Material Fouling Resistance
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Benchtop Zone Refinement of Simulated Future Spent Nuclear Fuel Pyroprocessing Waste.

Alex Scrimshire1, Daniel J Backhouse1, Wei Deng1

  • 1Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK.

Materials (Basel, Switzerland)
|April 27, 2024
PubMed
Summary
This summary is machine-generated.

Zone refining shows promise for cleaning contaminated salt from nuclear fuel reprocessing, effectively reducing rare earth element chlorides in electrorefining waste simulants. Further research is needed for electroreducing waste due to simulant homogeneity challenges.

Keywords:
LKEchloride saltsmolten saltnuclear fuel cyclepyroprocessingzone refinement

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Area of Science:

  • Nuclear Engineering
  • Materials Science
  • Chemical Engineering

Background:

  • The UK is exploring pyroprocessing for spent nuclear fuel, necessitating effective waste management strategies.
  • Contaminated salt from electroreducing and electrorefining processes requires robust clean-up methods.
  • Zone refining offers a potential solution by exploiting phase changes to separate contaminants.

Purpose of the Study:

  • To investigate the feasibility of zone refining for cleaning waste salts from nuclear fuel pyroprocessing.
  • To assess the effectiveness of zone refining in separating contaminants from electrorefining and electroreducing simulants.
  • To determine segregation coefficients for contaminants in simulated waste salts.

Main Methods:

  • Experiments were conducted using laboratory equipment to simulate zone refining processes.
  • Off-the-shelf laboratory apparatus was utilized for waste simulant treatment.
  • Segregation coefficients (k) were calculated to quantify separation efficiency.

Main Results:

  • Zone refining successfully demonstrated contaminant separation in electrorefining simulant samples.
  • Effective segregation coefficients (k) between 0 and 1 were achieved, with values as low as 0.542.
  • A reduction in RECl3 content from 10.0 wt.% to 8.4 wt.% was observed for electrorefining simulants, enabling 80% salt reuse.

Conclusions:

  • Zone refining is a feasible method for cleaning electrorefining waste simulants in nuclear fuel reprocessing.
  • Challenges in preparing homogeneous electroreducing simulant waste hindered feasibility demonstration for this stream.
  • Further research is required to optimize simulant preparation for electroreducing waste treatment via zone refining.