Research methodology using for implementation of project objectives is observational method. It includes a group of different research methods, which could be put in the following groups: collection the available data; cases studies and analysis of data. Cases studies involve the detailed research of indoor radon concentration in different groups of buildings with public access. The two methods of the radon measurement (passive and active) will use for investigation of the premises.The results will be analyzed by applying statistical methods and models for their evaluation in order to establish a risk assessment algorithm for radon.
