不同压强下氡气运移实验研究

氡气在空气中的运移研究是氡气测量和防护的基础理论问题。论文以实验为基础,采用活性炭累积测氡法,对氡气在不同气体压强下的运移规律进行研究。得出:氡气在空气中运移速度与空气压强有关,空气压强越大,运移速度越快,在低压状态下向下运移更加明显;对比氡气在竖直方向和水平方向上测量结果,不管压强高低,氡气运移在竖直方向上的运移能力远远超过水平方向;在不同压强情况下氡气平均速度估算,常压下向上运移平均速度为1.02×10-6m/s、向下运移平均速度为2.08×10-6m/s,低压下(相对真空度为-0.06 MPa)氡气的向上运移平均速度为0.91×10-6 m/s、向下运移平均速度为2.77×10-6m/s,与实际测量结果符合性良好。

In Different Pressure an Experimental Study on Migration of Radon

The migration study of Radon in the air is the foundation theory problems of radon measurement and protection.Basing on experiment,the paper uses the method of active carbon accumulated measuring radon to study the migration regularity of radon gas in different gas pressure.Through series experiments,following conclusions can be obtained: the migration velocity of radon in the air is related with the air pressure,with greater air pressure,the conveyance speed is faster.Especially at low-pressure state the downward migration is more apparent.Through the comparison of measurement results of radon in vertical direction and a horizontal direction,the migration ability of radon in the vertical height is far larger than that in the horizontal direction whatever the pressure is.The average speed of radon in different pressures cases are estimated as follows: the upward migration average speed under atmospheric environment is 1.02 10-6m/s,the downward migration average speed is 2.08 10-6m/s;The upward migration average speed under-0.06 MPa vacuum environment is 0.91×10-6m/s,the downward migration average speed is 2.77×10-6m/s.As is consistent with the practical measurement result.