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Radiation Protection Dosimetry Advance Access originally published online on October 18, 2006
Radiation Protection Dosimetry 2006 121(1):31-38; doi:10.1093/rpd/ncl153
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Uncertainties in personal dosimetry for external radiation: a Monte Carlo approach

J. W. E. van Dijk*

NRG Radiation and Environment, P.O. Box 3094, 6800 ES Arnhem, The Netherlands

* Corresponding author: j.vandijk{at}nrg-nl.com


  Abstract

This paper explores the possibilities of numerical methods for uncertainty analysis of personal dosimetry systems. Using a numerical method based on Monte Carlo sampling the probability density function (PDF) of the dose measured using a personal dosemeter can be calculated using type-test measurements. From this PDF the combined standard uncertainty in the measurements with the dosemeter and the confidence interval can be calculated. The method calculates the output PDF directly from the PDFs of the inputs of the system such as the spectral distribution of the radiation and distributions of detector parameters like sensitivity and zero signal. The method can be used not only in its own right but also for validating other methods because it is not limited by restrictions that apply to using the Law of Propagation of Uncertainty and the Central Limit Theorem. The use of the method is demonstrated using the type-test data of the NRG-TLD.


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