摘要
针对某烟囱流出物取样管嘴颗粒传输特性有待量化评估的问题,依据《核设施烟囱和管道中放射性物质的取样》(ISO 2889:2023)标准设计了一种遮罩式取样管嘴,并建立了传输比测试方法,开展了实验研究。结果表明,在设计流量100 L/min和自由流速8.0~12.0 m/s条件下,取样管嘴传输比保持在1.00~1.10范围内,满足标准推荐区间0.80~1.30;实验结果与理论计算总体一致,相对误差小于10%。研究表明,该取样管嘴在设计工况下能够维持稳定的颗粒传输特性,满足标准要求。
To enable quantitative characterization of particle transport performance in stack effluent sampling nozzles,a shrouded sampling nozzle was designed in compliance with ISO 2889,"Sampling of airborne radioactive materials from stacks and ventilation ducts of nuclear facilities",and a transport ratio testing method was developed,and experimentally validated.Results show that at the design sampling flow rate of 100 L/min and free-stream velocities ranging from 8.0 to 12.0 m/s,the transport ratio remained within 1.00 to 1.10,meeting the ISO-recommended range of 0.80 to 1.30.Good agreement was observed between experimental data and theoretical predictions,with relative errors below 10%.These results indicate that the proposed nozzle exhibits stable particle transport behavior under the target operating conditions,fully complying with the acceptance criteria.
作者
杨屹
张艳婷
马弢
张富国
商洁
YANG Yi;ZHANG Yanting;MA Tao;ZHANG Fuguo;SHANG Jie(China Institute for Radiation Protection,Taiyuan 030006;Key Laboratory of Radiation Safety and Protection in Shanxi Province,Taiyuan 030006;Key Laboratory of Radiation Protection Technology of China National Nuclear Corporation,Taiyuan 030006)
出处
《辐射防护》
北大核心
2026年第2期150-155,共6页
Radiation Protection
关键词
遮罩式取样管嘴
传输比
气溶胶
粒径
流出物
shrouded sampling nozzle
transport ratio
aerosol
particle size
stack effluent
