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Radiation Protection Dosimetry Advance Access originally published online on May 30, 2006
Radiation Protection Dosimetry 2006 121(3):303-309; doi:10.1093/rpd/ncl036
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Influence of environmental changes on continuous radon monitors. results of a Spanish intercomparison exercise

A. Vargas* and X. Ortega

Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya, Avda. Diagonal 647, 08028 Barcelona, Spain

* Corresponding author: arturo.vargas{at}upc.edu

Received December 31, 2005, amended February 22, 2006, accepted March 5, 2006


  Abstract

The first Spanish intercomparison exercise for continuous radon monitors was carried out with the participation of nine monitoring systems from eight laboratories. The exposures were carried out in the radon and thoron chambers at the Institute of Energy Techniques (INTE) of the Technical University of Catalonia (UPC), which is considered to be the Spanish reference chamber. The monitors were exposed to three different temperatures (13, 20 and 30°C), relative humidities (30, 45 and 80%) and radon concentrations (450, 2000 and 9000 Bq m–3). Exposures in the thoron chamber were carried out at concentrations of ~450 Bq m–3. The response of the ionisation chambers and scintillation monitors was acceptable. However, the response of monitors based on electrostatic collection was found to be influenced by external climatic conditions. Moreover, all radon monitors were sensitive to thoron concentration, which was especially significant for scintillation monitors.


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