The Radamon radon detector and an example of application

The etched track type Radamon radon detector is presented. As an example of application representative indoor radon survey was performed in Gyergyóremete (Romania) to pilot a study that can be done in other places of the country. Gyergyóremete was selected, because it was built on volcanic rock, where a number of aligning mineral water springs indicates the existence of geological faulting, and therefore, it was suspected that the village could be on a radon prone area. Measurements were done in sleeping rooms at pillow level. Representativity of the sample was ensured by random pull of 120 houses from the stock (hypergeometric statistical model). From the results it can be stated that the percentages of houses expected to have annual average ²²²Rn activity concentration higher than 400 Bqm^?3 is less than 1%.