Legal regulations on the utilization of raws and materials assigned for construction are applied inPoland taking into account radiation protection. A qualification coefficient f2 = SRa, where SRa is the 226Ra concentration in the material expressed in Bq/kg, connected with the limitation of radium concentration in the product due to the emanation of 222Rn (in parallel with qualification coefficient f1 limiting whole-body exposure for gamma radiation) is used for the purpose of limitation of the 222Rn concentration in buildings assigned for permanent residence of people.
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