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AGHCF gaseous-effluent tritium sampling system: design considerations and performance testing results.

W J Munyon1, D W Reilly, J Webb

  • 1Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA. wjmunyon@anl.gov

Health Physics
|December 20, 2007
PubMed
Summary

This study tested a gaseous-effluent tritium sampling system using ethylene glycol bubblers. The system demonstrated high tritium collection efficiency, with minimal memory effects, ensuring accurate environmental monitoring.

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Nuclear Engineering

Background:

  • Gaseous effluent monitoring is crucial for nuclear facilities.
  • Accurate tritium sampling is essential for environmental safety.
  • Existing sampling methods require optimization for efficiency and waste reduction.

Purpose of the Study:

  • To evaluate the performance of a gaseous-effluent tritium sampling system.
  • To assess the efficiency of ethylene glycol bubblers for tritium collection.
  • To optimize the sampling system for improved performance and reduced waste generation.

Main Methods:

  • Utilized ethylene glycol bubblers to collect tritiated water vapor from nitrogen purge gas.
  • Employed a high-temperature copper oxide bed to convert tritiated gas to water vapor.

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  • Investigated collection efficiency variations with sorbent volume and compared with water-filled bubblers.
  • Assessed catalyst bed oxidation efficiency and system memory effects.

    • Main Results:

    • A single ethylene glycol bubbler achieved 98.3% tritium collection efficiency.
    • Two series-connected water bubblers showed 95.4% efficiency with notable water loss.
    • Optimal oxidation of tritiated gas to water vapor occurred at 350°C.
    • System memory effects were found to be inconsequential.

    Conclusions:

    • The developed tritium sampling system is highly effective for gaseous effluents.
    • Ethylene glycol bubblers offer a reliable and efficient method for tritium collection.
    • The system's performance supports accurate environmental tritium discharge monitoring with an overall uncertainty of +/-24%.