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Estimate of radon exposure in geothermal spas in Poland
Katarzyna Walczak1, Jerzy Olszewski2, Marek Zmyślony3
1Nofer Institute of Occupational Medicine, Łódź, Poland (Department of Radiological Protection). kwalczak@imp.lodz.pl.
Objectives:
Geothermal waters may contain soluble, radioactive radon gas. Spa facilities that use geothermal water may be a source of an increased radiation dose to people who stay there. It has been necessary to assess the exposure to radon among people: workers and visitors of spa centers that use geothermal waters.
Material And Methods:
In 2013, workers of the Nofer Institute of Occupational Medicine measured concentrations of radon over the geothermal water surfaces in 9 selected Polish spa centers which use geothermal water for recreational and medicinal purposes. The measurements were performed by active dosimetry using Lucas scintillation cells.
Results:
According to our research, the doses received by the personnel in Polish geothermal spas are < 0.6 mSv/year. In 1 of the investigated spas, the estimated annual dose to the staff may exceed 3 mSv/year.
Conclusions:
In Polish geothermal spas, neither the workers nor the visitors are at risk of receiving doses that exceed the safe limits.
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