A DOSE CALCULATION MODEL APPLICATION FOR INDOOR EXPOSURE TO TWO-LAYER WALLS GAMMA IRRADIATION: THE CASE STUDY OF CERAMIC TILES.

A calculation model for determining the indoor dose due to building materials with significant concentration of radioactivity has been applied to the case study of ceramic tiles; the model allows the contribution of bearing walls and wall covering materials to be calculated. The model is implemented in FORTRAN 77 and provides a quantification of the gamma radiation field (in terms of external dose rate in air, nGyh) inside a room with known dimensions. Application model results have been validated both by comparison with the results obtained by other authors and by experimental measurements.