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    STUDIA AMBIENTUM - Issue no. 1-2 / 2009  
         
  Article:   RADIOLOGICAL SURVEY OF THERMAL BATH IN IGAL-HUNGARY.

Authors:  NÓRA JÁNOKI, JÁNOS SOMLAI, VIKTOR JOBBÁGY, TIBOR KOVÁCS. 		 
       
         
  Abstract:  The radon and radium content of thermal waters is usually higher than that of surface waters. Consequently, the radon concentration in the air of thermal baths may increase, therefore the annual radiation dose of those taking part at the treatment and the workers may exceed the limit recommended by WHO. To find these data measurements have been carried out in Igal, in one of the most important medicinal and thermal baths in Hungary. The activity concentration of 222Rn was measured in the hot and cold-water pools, and in the medicinal and drinking waters of the bath, and at several points in the air in the territory of the bath. The activity concentration of 226Ra, and the gross alpha and gross beta activities were also identified in the sources. Radon activity concentration values resulted between 1.6 and 11.5 Bq/l, while the activity concentration of radium reached even 2.1 Bq/l, which leads to that if an adult is supposed to consume 1 litre of water daily, the resulting annual dose rate is 0.21 mSv. The activity concentration of radon in the air was below 200 Bq/m3, and the dose rate originating from inhalation on workers varied between 0.34 and 0.7 mSv, while in case of visitors staying there meant an extra dose of 0.09-0.19 mSv/year only.


Keywords: radon, radium, thermal bath, Hungary 		 
         
     
         
         
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