摘要
ISO2889由1975升版至2010版,对核电站排气筒辐射监测取样提出新要求:采用单点取样器进行取样,并通过现场试验对排气筒辐射监测取样截面均匀性进行验证。单点取样器应布置在浓度场和速度场均匀的位置,确保所取气体具有代表性。设计单位使用CFD模拟的方法对排气筒的流场进行分析,对排气筒不同截面上的混合均匀性进行对比,指导辐射监测取样系统在排气筒上找到合适的取样点。
ISO2889 has been updated from 1975 to 2010 edition. The new version recommends the application of single nozzle sampling probe to sample the airborne radioactive effluent materials of nuclear facilities. Representative sample is best accomplished where samples are extracted from airstreams in which potential airborne contaminants are well mixed in the air stream. CFD simulation technology （computational fluid dynamics） is used to simulate the air stream field. The mixed situation of air effluent materials at different sections of stack is simulated to find well mixed section to place sampling probe.
出处
《建筑热能通风空调》
2017年第2期67-71,共5页
Building Energy & Environment
关键词
核电站
排气筒
CFD模拟
放射性活度监测
取样代表性
nuclear power station, vent stack, CFD simulation technology, radioactivity monitoring, representative sampling
