摘要
作为福岛事故的重要经验反馈之一,应急控制中心在事故条件下发挥的作用应受到足够重视。目前在应急控制中心可居留性评价中通常采用固定的非过滤泄漏量,未考虑非过滤泄漏与事故新风量的关系。事故条件下新风量的增加有利于维持应急控制中心可居留区域边界的正压,防止外界污染空气未经过滤直接渗入可居留区域内,即降低非过滤渗漏量,但也必然引入更多的污染空气,因而有必要针对应急控制中心的新风量开展敏感性分析,讨论室内空气中放射性浓度随新风量的变化情况。本文深入研究了事故工况下新风量与非过滤渗入风量的关系,结合污染物在应急控制中心可居留区域的迁移模型,针对NUREG—1465参考源项,对影响应急控制室放射性浓度的关键参数——新风量进行了敏感性分析,分别讨论了不同新风量条件下气溶胶和惰性气体引起的应急控制室内放射性浓度的变化情况,并确定了对剂量起主导作用的放射性核素组。相关分析结果可为应急控制中心的设计优化提供一定参考。
Based on lessons learned from Fukushima Daiichi NPP accident,new requirements for NPP emergency management center should be put forward. Increasing the amount of fresh air is conductive to maintain the sealing performance of emergency management center,and to prevent the polluted air entering room without filtration,but it also introduced more polluted air. While at the same time,fixed value for air infiltration leakage rate is used in the assessment of emergency management center habitability,it is necessary to make sensitivity analysis for fresh air flow during accident condition. Considering the radionuclide migration model established for evaluating activity level inside the emergency management center,correlation between fresh air flow and air infiltration leakage has been discussed in this paper. Meanwhile,based on NUREG—1465 reference source terms,sensitivity analysis of fresh air flow is performed for both aerosols and noble gas in the emergency management center,and the nuclide group with leading role of doses is identified. The preliminary results could provide necessary technical support to optimization of emergency management center design.
作者
王梦溪
刘新建
蔺洪涛
WANG Meng-xi;LIU Xin-jian;LIN Hong-tao(China Nuclear Power Engineering Co.,Ltd.,Beijing 100084,Chin)
出处
《核科学与工程》
CAS
CSCD
北大核心
2018年第3期453-460,共8页
Nuclear Science and Engineering
基金
中核集团核电核动力工程设计软件(第三阶段)研发科研项目(FKY1616ZFS001)
关键词
应急控制中心
可居留性
敏感性分析
Emergency management center
Habitability
Sensitivity analysis
