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Radiation Protection Dosimetry Advance Access originally published online on May 21, 2007
Radiation Protection Dosimetry 2007 126(1-4):564-567; doi:10.1093/rpd/ncm114
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Measurements and simulations of the radiation exposure to aircraft crew workplaces due to cosmic radiation in the atmosphere

P. Beck1,*, M. Latocha1,3, L. Dorman2, M. Pelliccioni4 and S. Rollet1

1 Austrian Research Centers GmbH - ARC, Health Physics Division, 2444 Seibersdorf, Austria
2 Tel Aviv University, TECHNION, Cosmic Ray & Space Weather Centre, Tel Aviv, Israel
3 Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Kraków, Poland
4 INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy

* Corresponding author: peter.beck{at}arcs.ac.at

As required by the European Directive 96/29/Euratom, radiation exposure due to natural ionizing radiation has to be taken into account at workplaces if the effective dose could become more than 1 mSv per year. An example of workers concerned by this directive is aircraft crew due to cosmic radiation exposure in the atmosphere. Extensive measurement campaigns on board aircrafts have been carried out to assess ambient dose equivalent. A consortium of European dosimetry institutes within EURADOS WG5 summarized experimental data and results of calculations, together with detailed descriptions of the methods for measurements and calculations. The radiation protection quantity of interest is the effective dose, E (ISO). The comparison of results by measurements and calculations is done in terms of the operational quantity ambient dose equivalent, H*(10). This paper gives an overview of the EURADOS Aircraft Crew In-Flight Database and it presents a new empirical model describing fitting functions for this data. Furthermore, it describes numerical simulations performed with the Monte Carlo code FLUKA-2005 using an updated version of the cosmic radiation primary spectra. The ratio between ambient dose equivalent and effective dose at commercial flight altitudes, calculated with FLUKA-2005, is discussed. Finally, it presents the aviation dosimetry model AVIDOS based on FLUKA-2005 simulations for routine dose assessment. The code has been developed by Austrian Research Centers (ARC) for the public usage (http://avidos.healthphysics.at).


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