EVALUATION OF RADIOACTIVITY FROM COMMERCIAL CONSTRUCTION MATERIALS AND ITS RADON EXHALATION IMPLICATIONS ON RESIDENTS

The activity concentrations obtained from the measured samples were used to estimate the radiological risks of radium equivalent activity (Raeq) in the construction substance. The activity concentrations of few samples were found to exceed the international recommended points. But, the largest radium equivalent activity (Raeq) acquired from this research is less than the peak dose limit of one as stipulated by global recommendation. The correlation coefficient between the dose rate and Raeq activity indicated positive, revealing that increase in Raeq, enhances the dose exposure to the dwellers. Chi-square plot of Raeq activity against the samples revealed that royal ceramic tiles could be the most stable, having their raw materials (geologic material) components in equal and balanced proportions. It may also indicate that Royal ceramics has relationship with all other samples (as per composition). The whiskers indicate upper and lower quartiles, so the box spans the interquartile range. Qi = 115.66, median = 153.5, Q3 = 238, IQ = 122.34, whiskers = 115.66, 238