Kefalati Motahareh, Masoudi S Farhad, Abbasi Akbar
Department of Physics, K.N. Toosi University of Technology, P.O. Box 15875-4416, Tehran, 15418-49611 Iran.
Faculty of Engineering, University of Kyrenia, TRNC, via Mersin 10, Kyrenia, Turkey.
J Environ Health Sci Eng. 2021 Apr 26;19(1):933-939. doi: 10.1007/s40201-021-00660-7. eCollection 2021 Jun.
The use of granite stones as building materials in homes or offices can result in the residents' long-term whole-body exposure to gamma radiation. Although the whole-body annual dose has been investigated in the literature, it is obvious that different human organs receive different equivalent dose due to different position respect to the walls and floor covered by granite stones. In this paper, the effect of distance from the walls and floor of a room on the equivalent dose is investigated by using MCNPX code. An "ORNL" phantom is simulated in three situations; standing (P1), sleeping one meter above the floor (P2) and sleeping on the floor (P3) and the equivalent dose in different organs is calculated. Excess lifetime cancer risk (ELCR) is calculated in the whole of the body for these three positions. By the results, the value of ELCR in the third position is more than the average world value (2.9 × 10). The results show the importance of considering body position in dose determination, especially in some organs such as the brain and eyes which are close to the granite stones in certain positions such as sleeping.
在家居或办公室使用花岗岩作为建筑材料会导致居民长期全身暴露于伽马辐射。尽管文献中已对全身年剂量进行了研究，但显然由于相对于覆盖花岗岩的墙壁和地板的位置不同，人体不同器官接受的当量剂量也不同。本文使用MCNPX代码研究了房间墙壁和地板距离对当量剂量的影响。在三种情况下模拟了一个“ORNL”人体模型；站立（P1）、在离地面一米高的地方睡觉（P2）以及睡在地板上（P3），并计算了不同器官中的当量剂量。针对这三个位置计算了全身的超额终身癌症风险（ELCR）。结果显示，第三个位置的ELCR值高于世界平均水平（2.9×10）。结果表明在剂量确定中考虑身体姿势的重要性，尤其是在某些器官，如大脑和眼睛，在睡眠等特定姿势下靠近花岗岩时。
