Evaluation of the minimum detectable activity of whole-body and thyroid counters of the in vivo monitoring laboratory of IPEN/ CNEN-SP

Authors

  • L. R. Santos Instituto de Pesquisas Energéticas e Nucleares
  • M. Xavier Instituto de Pesquisas Energéticas e Nucleares
  • A. A. Y. Kakoi Instituto de Pesquisas Energéticas e Nucleares
  • I. A. Jr. Silva Instituto de Pesquisas Energéticas e Nucleares
  • J. C. S. Cardoso Instituto de Pesquisas Energéticas e Nucleares

Keywords:

In Vivo Monitoring, Minimum detectable activity, critical level

Abstract

Quality assurance in whole-body measurement includes quality control with proceduredescriptions, detector calibrations, instrument control and evaluation internally or by outside persons. TheIn Vivo Monitoring Laboratory of IPEN/CNEN-SP (LMIV) provides a direct way activity measure ofinternally incorporated radionuclides in occupationally exposed workers. LMIV has two NaI(Tl) of 8x4 "and 2x2 " to perform the monitoring of whole-body and thyroid, respectively. The acquisition andanalisys software was Genie2000 3.2, Canberra. The system calibration was carried out with Eu-152,Am-241 and Co-60 sources positioned within Alderson Research Labs. anthropomorphic phantom.Minimum detectable activity (MDA) and critical level (Lc) values for nuclides of interest weredetermined, since these values are an indication of the sensitivity of the detection system. The backgroundcounts were obtained from the first monitoring of some workers, blank measurements. The conceptsadopted in the HPS N13.30 Standard and proposed in ISO documents for standardization were used foractivity measurements.

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Published

2012-12-03

How to Cite

Santos, L. R., Xavier, M., Kakoi, A. A. Y., Jr. Silva, I. A., & Cardoso, J. C. S. (2012). Evaluation of the minimum detectable activity of whole-body and thyroid counters of the in vivo monitoring laboratory of IPEN/ CNEN-SP. Scientia Plena, 8(11(a). Retrieved from https://www.scientiaplena.org.br/sp/article/view/1179

Issue

Vol. 8 No. 11(a) (2012): November/Novembro 2012

Section

Articles

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