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Radiation Protection Dosimetry Advance Access originally published online on July 17, 2008
Radiation Protection Dosimetry 2008 130(1):26-29; doi:10.1093/rpd/ncn126
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Mitigation of three water supplies with high radon exposure to the employees

W. Ringer1,*, M. Simader1, M. Bernreiter1 and H. Kaineder2

1 Austrian Agency for Health and Food Safety, Radioecology and Radon, Derfflingerstrasse 2, A-4020 Linz, Austria
2 Federal Government of Upper Austria, Environment, Kärntner Straße 10-12, A-4021 Linz, Austria

* Corresponding author: wolfgang.ringer{at}ages.at

A comprehensive survey to determine the occupational radiation exposure in water supplies and spas was conducted in the federal state of Upper Austria. The study comprises 45 water supplies. The limit for radon exposure of 6 MBq h m–3 was exceeded by two water supplies (WS 33 and WS 42). In one water supply (WS 29), the level of 2 MBq h m–3 was exceeded. These water supplies were mitigated. Prior to mitigation the main radon sources were identified. Mitigation measures were: evacuation of the outlet air of the vaporiser by means of a fan, installation of a fan in the exhaust air duct of the compensating reservoir, sealing of drain shafts and mechanical ventilation of the office. In all water supplies, the radon exposure was reduced to below 0.8 MBq h m–3 at a cost of approx. {euro} 750 to {euro} 1000.


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