摘要
为了弥补传统场所α气溶胶实时连续监测技术在后处理等场所^(239) Pu气溶胶活度浓度连续监测方面探测能力和响应速度方面的不足,本文开展了基于ICP-MS的空气中^(239) Pu气溶胶连续监测技术研究。通过对气溶胶直接进样方法、ICP-MS连续测量定量方法、238 U干扰等方面研究工作的开展,建立了基于ICP-MS、气溶胶直接进样系统和膜去溶雾化器联用的场所^(239) Pu气溶胶活度浓度连续监测技术。在单次测量时间为1 min的情况下,依据ISO 11929(2019)计算得到本系统对^(239) Pu气溶胶判断限和探测限分别为1.24×10^(-5) Bq/m^(3)和2.48×10^(-5) Bq/m^(3),优于传统的基于PIPS的α气溶胶实时连续监测系统,远低于^(239) Pu的导出空气浓度限值,证明该技术可为相关工艺场所^(239) Pu气溶胶活度浓度连续监测提供快速高效的技术支持。
In order to make up for the shortcoming of the traditional continuous aerosol monitoring technology in the detection ability and response speed of continuous ^(239) Pu aerosol activity concentration monitoring in the reprocessing plant,the continuous ^(239) Pu aerosol activity concentration monitoring technology based on ICP-MS was studied.With the research of aerosol direct sampling method,ICP-MS continuous measurement quantitative method and 238 U interference to the system,a continuous ^(239) Pu aerosol activity concentration monitoring technology based on ICP-MS,aerosol direct sampling device and membrane desolvation nebulizer was established.The decision threshold and detection limit of this system for measuring ^(239) Pu aerosol activity concentration was calculated according to the ISO 11929(2019),which are 1.24×10^(-5) Bq/m^(3) and 2.48×10^(-5) Bq/m^(3) with 1 min measurement.Detection performance of this system is better than those of continuousαmonitors based on planar implanted passivated silicon(PIPS)and much lower than the derived air concentration(DAC)of ^(239) Pu.It is proved that this technology can provide efficiently technical support for continuous ^(239) Pu aerosol activity concentration monitoring in related workplaces.
作者
汪传高
殷敏
郑国文
庞洪超
骆志平
陈然
吴昊
尹云云
陈凌
王仲文
WANG Chuangao;YIN Min;ZHENG Guowen;PANG Hongchao;LUO Zhiping;CHEN Ran;WU Hao;YIN Yunyun;CHEN Ling;WANG Zhongwen(China Institute of Atomic Energy,Beijing 102413,China;404 Company Limited,CNNC,Jiayuguan 732850,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第12期2359-2367,共9页
Atomic Energy Science and Technology
