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Related Experiment Videos

Method for actinides and Sr-90 determination in urine samples

A Alvarez1, N Navarro

  • 1Radiological Protection Division, CIEMAT, Madrid, Spain.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|September 1, 1996
PubMed
Summary

A new method accurately measures low levels of plutonium, americium, and strontium-90 in urine, crucial for radiation protection during nuclear facility decommissioning. This ensures personnel safety by monitoring internal radionuclide exposure.

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Area of Science:

  • Nuclear Chemistry
  • Radiological Protection
  • Analytical Chemistry

Background:

  • Nuclear facility decommissioning requires robust radiation protection protocols.
  • Monitoring personnel exposure involves analyzing biological samples for radionuclides.
  • Actinides like plutonium and americium, along with strontium-90, are key contaminants of concern.

Purpose of the Study:

  • To develop a sequential measurement technique for low levels of plutonium-239, americium-241, and strontium-90 in urine.
  • To establish a reliable method for monitoring internal radionuclide contamination in personnel.
  • To support radiation protection efforts at the CIEMAT nuclear facilities.

Main Methods:

  • Sequential measurement involving phosphate coprecipitation of radionuclides from urine.

Related Experiment Videos

  • Plutonium separation using conventional anion exchange chromatography.
  • Americium and strontium isolation via sequential chromatographic extraction (Tru.Spec and Sr.Spec columns).
  • Measurement by alpha spectrometry for plutonium and americium, and liquid scintillation counting for strontium-90.

    • Main Results:

    • Achieved a mean recovery of 80% for the measured radionuclides.
    • Established a detection limit of 0.6 mBq L-1 for a 24-hour urine sample for plutonium and americium.
    • Established a detection limit of 1.1 E-01 Bq/L for strontium-90 determination.

    Conclusions:

    • The developed technique enables sequential measurement of key radionuclides (Pu, Am, Sr-90) in urine samples.
    • The method provides reliable monitoring for internal contamination, essential for radiation protection in nuclear decommissioning.
    • The established detection limits are suitable for assessing personnel exposure in nuclear facilities.