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Gross beta determination in drinking water using scintillating fiber array detector.

Wen-Hui Lv1, Hong-Chang Yi2, Tong-Qing Liu2

  • 1Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084, China; Xi'an Research Institute of Hi-Tech, Xi'an 710025, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|April 13, 2018
PubMed
Summary
This summary is machine-generated.

A new scintillating fiber array detector accurately measures real-time radioactivity in drinking water. This system offers a low background rate and high detection efficiency for beta particles, crucial for water safety monitoring.

Keywords:
Drinking waterGross beta countingScintillating fiber

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Area of Science:

  • Nuclear Instrumentation
  • Environmental Monitoring
  • Analytical Chemistry

Background:

  • Real-time radioactivity monitoring in drinking water is essential for public health.
  • Existing methods may lack sensitivity or require lengthy procedures.
  • Development of advanced detectors is needed for efficient water quality assessment.

Purpose of the Study:

  • To develop and evaluate a scintillating fiber array detector for gross beta counting in drinking water.
  • To assess the detector's performance for real-time radioactivity monitoring.
  • To compare the detector's results with established measurement techniques.

Main Methods:

  • A scintillating fiber array detector with 1096 fibers and photomultiplier tubes was constructed.
  • Detector parameters (working voltage, background rate, stability) were tested.
  • Detection efficiency was calibrated using potassium chloride standards and validated against the evaporation method.

Main Results:

  • The detector achieved a background counting rate of 38.131 ± 0.005 cps.
  • Detection efficiency for beta particles was determined to be 0.37 ± 0.01 cps/(Bq/l).
  • Results showed consistency with the evaporation method, with a Minimum Detectable Activity (MDAC) below 1.0 Bq/l for beta particles within 120 minutes.

Conclusions:

  • The developed scintillating fiber array detector is effective for real-time gross beta counting in drinking water.
  • The system demonstrates reliable performance, accuracy, and sensitivity for water radioactivity monitoring.
  • This technology offers a promising approach for ensuring drinking water safety without pre-concentration steps.