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Technetium chemistry in the fuel cycle: combining basic and applied studies.

Frederic Poineau1, Edward Mausolf, Gordon D Jarvinen

  • 1Department of Chemistry, University of Nevada-Las Vegas, Las Vegas, Nevada 89154, USA.

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Technetium chemistry, though poorly explored, offers opportunities for nuclear fuel cycle applications. New technetium halides and alloys show promise for waste forms and separations.

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Area of Science:

  • Nuclear Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • Technetium (Tc) is intrinsically linked to nuclear reactions, with natural occurrence from uranium fission and artificial production via reactors.
  • Despite its central periodic table position, technetium's chemistry is less understood than its neighbors like molybdenum and ruthenium.
  • Limited facilities for handling the long-lived (99)Tc isotope restrict research, creating a niche for specialized studies.

Purpose of the Study:

  • To explore the under-investigated chemistry of technetium.
  • To identify potential applications of technetium compounds within the nuclear fuel cycle.
  • To synthesize and characterize novel technetium halide compounds.

Main Methods:

  • Synthesis of new technetium halide compounds.
  • Structural analysis of technetium halides.
  • Investigation of technetium-zirconium alloys as potential waste forms.
  • Study of reduced technetium species formation during separation processes.

Main Results:

  • Demonstrated trends in structure, coordination number, and speciation for technetium halides.
  • Identified technetium-zirconium alloys as viable waste forms.
  • Observed the formation of reduced technetium species relevant to separation technologies.

Conclusions:

  • The synthesis of technetium halides provides fundamental insights applicable to the nuclear fuel cycle.
  • Technetium chemistry research can be integrated with practical applications in nuclear waste management and fuel reprocessing.
  • Further investigation into technetium compounds is warranted for optimizing nuclear technologies.