Natural radioactivity and chemical composition of different cement samples produced in South Korea were investigated using gamma-ray and X-ray fluorescence spectrometers. The absolute detector efficiency was determined using voluminous radioactive source and EFFTRAN program. Analytical methodologies for the determination of the chemical composition and specific activity of radionuclides were validated using NIST and IAEA reference materials. Radiological indices and parameters were calculated to estimate the radiological risk from the building materials. The results demonstrate that the natural radioactivity levels in cement are lower than the critical values and global mean values. The approximate source apportionment of NORs is also discussed.

使用伽马射线和 X 射线荧光光谱仪研究了韩国生产的不同水泥样品的天然放射性和化学成分。使用大体积放射源和 EFFTRAN 程序确定绝对检测器效率。使用 NIST 和 IAEA 参考材料验证了用于测定放射性核素化学成分和比活度的分析方法。计算放射学指标和参数以估计来自建筑材料的放射学风险。结果表明，水泥中的天然放射性水平低于临界值和全球平均值。还讨论了 NOR 的大致来源分配。