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应用MATLAB对开环式氡析出率测量过程中不同抽气流率下集氡罩内氡浓度随时间的变化规律进行模拟计算,并用实验对计算结果进行了验证。结果表明,在氡析出率测量时保持集氡罩参数不变的情况下,随着抽气流率的增大,集氡罩内平衡氡浓度值减小,达到平衡氡浓度的时间也缩短。实验表明,集氡罩内的平衡氡浓度的减小可最大限度地减小泄露与反扩散的影响;抽气流率的变大使集氡罩内达到平衡氡浓度时间缩短以及集氡罩内的充气均匀性愈好。通过本次实验,获得的抽气流率为1.94-3.0 L·min~(-1),集氡罩底面积为299 cm~2,体积为1.79×10~(-3)m~3。
The mathematic calculation results of the radon concentration in the radome under different suction flow rates during the measurement of radon release rate were simulated by MATLAB and the results were verified by experiments. The results show that under the circumstance that radon shield parameter is kept constant during radon precipitation rate measurement, with the increase of extraction flow rate, the concentration of radon concentration in the radome decreases and the time to reach equilibrium radon concentration also shortens. Experiments show that the radon concentration radon shield can reduce the concentration of the minimum to minimize the impact of leakage and anti-proliferation; suction flow rate becomes larger set radon hood to achieve a balanced radon concentration time shorten and set radon cover inflatable The better the uniformity Through this experiment, the aspiration flow rate was 1.94-3.0 L · min -1, the radon cover area was 299 cm 2, and the volume was 1.79 × 10 -3 m -3.