DISCUSION ON CRITERIA OF RADIATION PROTECTION OF BUILDING MATERIALS

This paper summarises the typical values of radioactive concentrations ofnatural radionuclides in some major building materials, discusses the mathods ofcalculating gamma dose indoors and annual increments of gamma dose indoors. Ifthe increments in whole body dose equivalent were set to 1 and 15 mSv/a, thecriteria of radioactivity in building materials for controlling indoor gammaexposure are proposed.