非能动氢复合器的应力分析和评定

Stress analysis of passive hydrogen autocatalytic recombiner

非能动氢复合器是核电站重要的安全屏障,能够避免核电站因氢气积聚而引发的燃烧和爆炸。在福岛核事故之后,国内外核电站更加重视非能动氢复合器的作用。本文主要研究非能动氢复合器在地震和LOCA工况下的应力状态。利用有限元软件ANSYS建立模型,合理考虑LOCA工况下气流载荷对结构的影响,最后按照RCC-M规范进行评定。结果表明,该结构满足RCC-M规范的相关要求。本文可以为非能动氢复合器应力分析与评定提供参考。

Background： Passive hydrogen autocatalytic recombiner is a device for eliminating hydrogen in the containment of the nuclear power plant when severe accident occurs, avoiding hydrogen explosion. After the Fukushima nuclear accident, the nuclear power plants pay more attention to the role of Passive hydrogen autocatalytic recombiner. Purpose： This paper studies the stresses of passive hydrogen autocatalytic recombiner under the seismic and LOCA conditions. Methods： Modeling by using the finite element software ANSYS, the impacts of airflow load under the LOCA conditions are considered reasonably and the strength of passive hydrogen autocatalytic recombiner is also evaluated according RCC-M. Results： The results show that the model can meet the requirement of the standard document. Conclusions： This paper will provide technical support for stress analysis and evaluation of passive hydrogen autocatalytic recombiner.