大空间内气溶胶自然沉降去除速率及空间分布特性分析  

Analysis of the aerosol natural deposition removal rate and spatial distribution characteristics in a large space

作　　者：李韬 谷海峰[1,2] 王辉 孙庆洋 周艳民[1,2] 于建群 汤添皓[1,2] 黄宁远 LI Tao;GU Haifeng;WANG Hui;SUN Qingyang;ZHOU Yanmin;YU Jianqun;TANG Tianhao;HUANG Ningyuan(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin Engineering University,Harbin 150001,China;China Nuclear Pow-er Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学黑龙江省核动力装置性能与设备重点实验室,黑龙江哈尔滨150001 [3]中国核电工程有限公司,北京100840

出　　处：《哈尔滨工程大学学报》2024年第12期2290-2297,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(U22B20134)。

摘　　要：为研究压水堆严重事故后安全壳内的气溶胶的自然沉降及迁移行为,本文采用大尺度气溶胶综合行为实验台架对大尺度安全壳模拟体(体积127 m3)内气溶胶的沉降及迁移行为进行研究。借助粒径谱变化分析了大尺度空间环境中不同位置的气溶胶沉降行为,获取如衰减指数、粒径变化等关键实验数据。探究了气溶胶在非均匀条件下的自然沉降行为,得到不同气溶胶位置的气溶胶沉降速率及空间分布变化规律,分析了压力、蒸汽份额等关键变量对于空间气溶胶沉降速率分布规律的影响。研究结果表明:在存在浓度不均现象时,罐体内的总体数量浓度下降速率偏小;在浓度均匀时,各位置气溶胶沉降去除规律偏于一致,且热工参数对于气溶胶沉降速率产生较大影响,对于各位置的影响规律相同。To investigate the natural deposition and movement of aerosols in a containment following a serious acci-dent in a pressurized water reactor,experiments were employed using a large-scale containment model with a vol-ume of 127 m3.Aerosol deposition behaviors at different positions within the large-scale space environment were analyzed through particle size spectrum changes.Key experimental data,such as the attenuation index and changes in particle size,were collected.This study explored how aerosols naturally deposit under nonuniform conditions and examined the deposition rate and spatial distribution changes at different positions.In addition,it analyzed the in-fluence of key variables such as pressure and steam share on the spatial aerosol deposition rates.The findings re-vealed that under uneven concentration conditions,the overall decrease in aerosol number concentration within the containment was minimal.However,when the concentration was uniform,the aerosol sedimentation behavior across different positions followed a consistent pattern.In addition,thermal parameters,such as temperature and pres-sure,had a substantial influence on the sedimentation rates,with a uniform impact across all positions.

关 键 词：气溶胶 自然沉降 气溶胶分层 气溶胶空间分布 凝并 衰减指数 大尺度安全壳 严重事故 

分 类 号：TL364[核科学技术—核技术及应用]