摘要
Natural radioactivity radionuclides in building materials, such as^(226)Ra,^(232)Th and^(40)K, cause indoor exposure due to their gamma-rays. In this research, in a standard dwelling room(5.0 m 9 4.0 m 9 2.8 m), with the floor covered by various granite stones, was set up to simulate the dose rates from the radionuclides using MCNP4 C code. Using samples of granite building products in Iran, activities of the^(226)Ra,^(232)Th and^(40)K were measured at 3.8–94.2, 6.5–172.2 and 556.9–1529.2 Bq kg^(-1),respectively. The simulated dose rates were26.31–184.36 n Gy h^(-1), while the measured dose rates were 27.70–204.17 n Gy h^(-1). With the results in good agreement, the simulation is suitable for any kind of dwelling places.
Natural radioactivity radionuclides in building materials, such as <sup>226</sup>Ra, <sup>232</sup>Th and <sup>40</sup>K, cause indoor exposure due to their gamma-rays. In this research, in a standard dwelling room (5.0 m × 4.0 m × 2.8 m), with the floor covered by various granite stones, was set up to simulate the dose rates from the radionuclides using MCNP4C code. Using samples of granite building products in Iran, activities of the <sup>226</sup>Ra, <sup>232</sup>Th and <sup>40</sup>K were measured at 3.8-94.2, 6.5-172.2 and 556.9-1529.2 Bq kg<sup>−1</sup>, respectively. The simulated dose rates were 26.31-184.36 nGy h<sup>−1</sup>, while the measured dose rates were 27.70-204.17 nGy h<sup>−1</sup>. With the results in good agreement, the simulation is suitable for any kind of dwelling places.
