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Wipe testing for surface contamination by tritiated compounds

J L Campbell1, C R Santerre, P C Farina

  • 1Environmental Health Science Program, University of Georgia, Athens 30602-7610.

Health Physics
|May 1, 1993
PubMed
Summary
This summary is machine-generated.

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The dry wipe test showed low recovery rates for tritium contamination on surfaces. Wet wipe effectiveness depended on contaminant solubility and surface type, impacting radioactive contamination monitoring.

Area of Science:

  • Radiochemistry
  • Environmental Monitoring
  • Surface Contamination Analysis

Background:

  • Accurate detection of radioactive contamination is crucial for safety.
  • Tritiated compounds like thymidine and triolein are common radiological materials.
  • Standardized wipe testing methods are essential for reliable contamination assessment.

Purpose of the Study:

  • To evaluate the efficacy of the wipe test for detecting tritium contamination.
  • To compare the performance of dry versus wet wipe methods.
  • To assess the influence of different surfaces and solvents on contamination recovery.

Main Methods:

  • Radioactive contamination using tritiated thymidine and triolein was applied to various surfaces.
  • Surfaces included lead, stainless steel, polyurethane, wood, painted lead, floor tile, Formica, and bench paper.

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  • Wipe tests were conducted using dry filter papers or papers pre-wetted with water, methanol, petroleum ether, or ethyl acetate.

    • Main Results:

    • The dry wipe test yielded an average recovery rate of only 3% across all tested surfaces.
    • Wet wipe recovery rates were significantly influenced by the solubility of the tritiated compounds in the chosen solvent.
    • Surface characteristics, such as material and texture, also affected the efficiency of wet wipe contamination removal.

    Conclusions:

    • The dry wipe test is generally ineffective for quantifying tritium contamination.
    • Wet wipe testing offers improved sensitivity, but performance is highly dependent on solvent choice and surface properties.
    • Optimized wet wipe protocols are necessary for reliable assessment of radioactive surface contamination.