|
Koleksi Tamadun Pahang
|
|
| ||||||||||||||||||||||||||||||
| Abstract : Universiti Teknologi MARA |
| The high concentration of radionuclides contain in building materials will cause negative result to human health. This study was done with the aims to determine the concentration of radionuclides as well as to determine the activity concentration of radionuclides and to estimate the radiological risk assessment of radionuclides in building materials. The samples concentration were analysed using the Energy dispersive x-ray fluorescence (EDXRF). For concentration of radionuclides in building materials sample, mean value obtained for uranium-238, thorium-232 and potassium-40 were 22.71 mg/kg, 14 mg/kg and 2.61 %, respectively. The concentration of uranium-238 in building materials sample from highest to lowest were; B > F > D > C > E > A > G, for thorium-232 were; D > C > E > F > B > A > G and for potassium-40 were; F > B > C > D > E > A > G. Meanwhile, for the activity concentration of radionuclides, the mean values obtained for uranium-238, thorium-232 and potassium-40 were 280.38, 56.92 and 809.94 Bq/kg. Each of samples gave an average of 103.15 nGy/h for absorbed dose rate, 0.15 mSv/y for annual effective dose, and the value of 0.53 for external hazard index. As a safety precaution, some remedial actions have to be taken to prevent occurrence of high doses to workers and general public. Therefore, mitigation procedure can be taken as public awareness. |
| This material may be protected under Copyright Act which governs the making of photocopies or reproductions of copyrighted materials. You may use the digitized material for private study, scholarship, or research. |