超声雾化法捕集气溶胶的试验研究
doi: 10.13205/j.hjgc.201502014
EXPERIMENTAL STUDY ON CAPTURING AEROSOL BY ULTRASONIC ATOMIZATION
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摘要: 核设施退役过程,放射性气溶胶浓度较高,需要进行处理,以降低工作人员辐照风险。研究捕集剂配方、雾化通入量等对模拟气溶胶捕集效果的影响,结果表明:捕集剂配方对气溶胶捕集的效果差异明显;粒径越小的气溶胶粒子被雾化捕集的速度较慢;捕集剂通入量在0.06 kg/m3以下,对气溶胶捕集效果影响显著。对等离子切割解体设备产生的241Am、239Pu污染气溶胶进行雾化捕集,初始污染水平为136 Bq/m3的气溶胶经雾化捕集后可降至1.23 Bq/m3,捕集的效果显著。Abstract: During the decommissioning of the nuclear facilities,the high concentration radioactive areosol must be treated to reduce the operator’s irradiation risk. The experiments studied the relationships between the capturing liquid,the capturing liquid dose and the capturing effect for the simulative aerosol. The results indicated that the different capturing reagents had obvious different captuing result. The smaller aerosol particle had the lower volicity of being captured. When the captuing liquid dose was less than 0. 06 kg /m3,it had distinct influence on the result of capturing the simulative aerosol. The radioactive aerosol with241Am and 239Pu generated in cutting the contaminated steel facilities was treated by this method at decommissioning site. The radioactive concentration could be reduced from 136 Bq /m3 to 1. 23 Bq /m3 . The capturing had a remarkable result.
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Key words:
- aerosol /
- ultrasonic atomization /
- capturing
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