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Radiation Protection Dosimetry Advance Access originally published online on April 24, 2008
Radiation Protection Dosimetry 2008 130(1):43-47; doi:10.1093/rpd/ncn113
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

QA programme for radon and its short-lived progeny measuring instruments in NRPI Prague

K. Jílek1,*, J. Thomas1 and M. Brabec2,3

1 National Radiation Protection Institute, Department of Radon Expert Group, Prague, Czech Republic
2 Department of Nonlinear Modelling and National Institute of Computer Science, Prague, Czech Republic
3 Institute of Public Health, Prague, Czech Republic

* Corresponding author: karel.jilek{at}suro.cz

Received June 13, 2003, amended February 10, 2004, accepted February 24, 2004

To subserve the institutional research and tasks coming out from the Czech National Radon Programme, a new QA programme to calibrate all the known types of devices that measure radon and its short-lived progeny was developed at the Department of Radon mobile group of the National Radiation Protection Institute (NRPI) at Prague. The programme also included calibration of instruments measuring a unique quantity of unattached and attached fractions of short- lived radon progeny Generally, NRPI declares estimation of radon concentration during all routine calibration measurements with an overall uncertainty <5% (one sigma) and of equilibrium-equivalent radon concentration with an overall uncertainty <10% (one sigma). The results of the comparative measurements of the unattached and attached fractions of each short-lived radon progeny carried out with a comparing continuous monitor Fritra 4 in the German reference radon chamber at PTB Braunschweig indicated an acceptable level of agreement, up to 10%.


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