辐射防护 ›› 2014, Vol. 34 ›› Issue (2): 86-90.

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蒸汽发生器二次侧气溶胶沉积模型改进对安全壳旁通释放类的影响

黄高峰   

  1. 上海核工程研究设计院,上海 200233
  • 收稿日期:2012-12-13 出版日期:2014-03-20 发布日期:2025-01-03
  • 作者简介:黄高峰(1984—),男, 2006年毕业于哈尔滨工程大学核工程与核技术专业,2011年毕业于上海交通大学核反应堆工程专业,获博士学位,工程师。E-mail:huanggaofeng888@aliyun.com

Influences of Improvement to Steam Generator’s Secondary Aerosol Deposition Model on BP Release Category

Huang Gaofeng   

  1. Shanghai Nuclear Engineering Research and Design Institute,Shanghai 200233
  • Received:2012-12-13 Online:2014-03-20 Published:2025-01-03

摘要: 发生频率较大的安全壳旁通事故对严重事故的放射性后果有较大贡献。在AP1000的概率安全评价(PSA)分析中,采用MAAP4.0.4程序计算安全壳旁通事故的源项。MAAP4.0.4未考虑蒸汽发生器二次侧复杂流道结构对气溶胶的沉积效应,在国外相关实验的基础之上,开发了复杂流道结构下气溶胶的沉积模型,并修改MAAP4.0.4源程序中蒸汽发生器二次侧的气溶胶沉积模型,最后对安全壳旁通释放类的源项进行了重新评价,结果表明:采用改进后二次侧气溶胶沉积模型计算比采用原模型计算气溶胶的质量释放份额有所减少。这也为今后AP1000的概率安全评价分析中计算安全壳旁通事故源项提供一个参考。

关键词: 二次侧气溶胶沉积, 模型改进, 安全壳旁通释放类

Abstract: Large frequency containment bypass (BP) accidents have big contributions to radiological consequences of a severe accident. MAAP4.0.4 is used to calculate source term of AP1000 BP release category, but it is incapable of accurate simulation for aerosol deposition in the complicated structure of secondary steam generator. With the basis of overseas experiments, aerosol deposition model is developed in this work, then the source code of MAAP4.0.4 is changed. Reassessment of BP release category is done, which indicates that, old model is conservative.

Key words: secondary aerosol deposition, model improvement, BP release category

中图分类号: 

  • TL364