Czech Technical University, Thákurova 7, 166 29 Prague 6, Czech Republic.
Radiat Prot Dosimetry. 2020 Nov 27;191(2):238-243. doi: 10.1093/rpd/ncaa160.
This article focuses on an experimental study of the influence of imperfections on the value of the radon diffusion coefficient of various waterproofing materials. Microscopic holes were made by a thin tip or by a microdrill bit to imitate the real damage that can be incurred during construction. To determine the change in the radon diffusion coefficient, each waterproofing material was measured five times. The first measurement was performed on undamaged samples, while the following measurements were performed on samples with one, two, four and eight pinholes. The radon diffusion coefficient was measured under nonstationary conditions, because homemade radon sources with a slow rate of radon emanation were used. The radon diffusion coefficients identified in the study were compared according to the thickness of the material and the number and the size of the pinholes. The exact shape and size of the imperfections were documented by an electron microscope.
本文专注于研究不完整性对各种防水材料的氡扩散系数值的影响的实验研究。通过使用细尖端或微钻头制造微观孔，以模拟在施工过程中可能发生的实际损坏。为了确定氡扩散系数的变化，每种防水材料进行了五次测量。第一次测量是在未损坏的样品上进行的，而接下来的测量则是在有一个、两个、四个和八个微孔的样品上进行的。由于使用了具有缓慢氡散发率的自制氡源，因此在非稳定条件下测量了氡扩散系数。根据材料的厚度以及微孔的数量和大小，对研究中确定的氡扩散系数进行了比较。通过电子显微镜记录了不完整性的确切形状和大小。
