Monte Carlo simulation of lung counting efficiency using a whole-body counter at a nuclear power plant

L. Dongming*, J. Shuhai, L. Houwen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In order to routinely evaluate workers' internal exposure due to intake of radionuclides, a whole-body counter (WBC) at the Third Qinshan Nuclear Power Co.Ltd. (TQNPC) is used. Counting would typically occur immediately after a confirmed or suspected inhalation exposure. The counting geometry would differ as a result of the height of the individual being counted, which would result in over- or underestimated intake(s). In this study, Monte Carlo simulation was applied to evaluate the counting efficiency when performing a lung count using the WBC at the TQNPC. In order to validate the simulated efficiencies for lung counting, the WBC was benchmarked for various lung positions using a 137Cs source. The results show that the simulated efficiencies are fairly consistent with the measured ones for 137Cs, with a relative error of 0.289%. For a lung organ simulation, the discrepancy between the calibration phantom and the Chinese reference adult person (170 cm) was within 6% for peak energies ranging from 59.5 keV to 2000 keV. The relative errors vary from 4.63% to 8.41% depending on the person's height and photon energy. Therefore, the simulation technique is effective and practical for lung counting, which is difficult to calibrate using a physical phantom.

Original languageEnglish
Pages (from-to)59-63
Number of pages5
JournalRadioprotection
Volume51
Issue number1
DOIs
Publication statusPublished - Jan 2016
Externally publishedYes

Keywords

  • whole-body counter
  • Monte Carlo simulation
  • lung counting
  • counting efficiency

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