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IDENTIFICATION OF RADON AFFECTED WORK AND LIVING PLACES AND METHODS FOR THE REDUCTION OF THE RADON EXPOSURE

T. Streil
SARAD GmbH , Dorfplatz 1 , D-01705 Pesterwitz/Dresden, Germany
Phone: +49 351 6580 70 Fax: + 49 351 658078 E-mail: thomas.streil@t-online.de

High radon concentration in work and living places are caused by a high geological radon potential
of the soil , by technological processes, the use of building materials with high uranium, thorium
and radium content and the building construction.
Further the influence of the working and living conditions on the dose estimation is very important.
Especially the equilibrium factor and the unattached fraction are influenced by the working and
living conditions.
Further we report on radon risk mapping, the search for radon affected work and living places and
the experiences to propose the remedial action or radon protected building construction resulting
from the radon risk of the soil. Further the quality controll of this remediation or construction
process respectively the efficiency of the radon protection will be presented.
But not in all situations are remedial action possible. Therefore is for exposure reduction a radon
personal dosimetry necessary for a limitation and optimization the working or living time under
high radon concentration. The personal radon dosimetry on workplaces, for instance water works,
mines, show caves and other work places with high radon levels is up to now not sufficient
resolved. The possibility to include allert functions, the signalisation of high dose rate and also the
time resoluted dose determination give new chances for a real online dosimetry in such very
dangerouse places
Key words: radon personal dosimeter, smart card, radon, thoron, dosimetry, alpha spectrometry,
dose assessment, remedial action