摘要
利用自制的多孔介质氡渗流析出试验装置研究了不同压力梯度下介质低压与高压侧表面氡析出率的变化规律。试验结果表明:在压力梯度小于827.6Pa/m时,高压侧介质表面氡析出率随压力梯度的增大呈指数减小,低压侧介质表面氡析出率随压力梯度的增大呈线性增大;随着压力梯度的继续增大,介质两侧氡析出率趋于稳定。试验结果与理论值的比较表明,两者基本吻合。同时,压力梯度的增大在一定程度上导致介质总的氡析出率增大。
An apparatus for measuring the radon permeation and emanation in porous medium is developed, and the variation law of radon exhalation rate in different pressure state with pressure gradient is studied by using the apparatus. The results show that the radon exhalation rate on high pressure side decreases exponentially with the increase of pressure gradient and the radon exhalation rate on low pressure side increases linearly when the pressure gradient is less than 827.6 Pa/m,the results are in line with the theoretical calculating value. The radon exhalation rates tend to be stable with the continued increase of pressure gradient. Meanwhile, the increase of pressure gradient can increase the radon exhalation rate of the whole medium to some extent.
出处
《铀矿冶》
CAS
2013年第1期38-41,45,共5页
Uranium Mining and Metallurgy
基金
国家自然科学基金(11075071)
关键词
多孔介质
压力梯度
氡析出率
试验
porous medium
pressure gradient
radon exhalation rate
experiment
