上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (09): 1498-1502.

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MOPOL程序开发及IVR有效性评价中的不确定性分析

杨晓，杨燕华   

  1. （上海交通大学 核科学与工程学院， 上海 200240）  
  • 收稿日期:2011-09-15 出版日期:2012-09-28 发布日期:2012-09-28

MOPOL Development and Uncertainties Analysis in IVR Assessment

 YANG  Xiao, YANG  Yan-Hua   

  1. (School of Nuclear Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2011-09-15 Online:2012-09-28 Published:2012-09-28

摘要： 根据熔融物堆内滞留（IVR）的有效性评价方法——风险导向的事故分析方法（ROAAM）开发了IVR有效性评价的集总参数程序MOPOL，并对其进行验证.同时，分析了ROAAM评价过程中的破口尺寸、堆芯平均有效辐照时间及堆内材料质量等关键参数对IVR有效性评价结果影响的不确定性.结果表明：在大破口尺寸事故和辐照时间较长的工况下，压力容器发生热负荷失效的安全裕量较小；适当增加压力容器内的一些结构质量，可以提高IVR的有效性.  

关键词: 熔融物堆内滞留, 事故缓解, 二层集总参数模型, 不确定性

Abstract: A program named MOPOL based on lumped parameter model was developed to assess IVR (invessel core debris retention) effectiveness according to the IVR assessment method——ROAAM (risk oriented accident analysis methodology), then the program was validated. Regarding the key parameters in IVR assessment such as break size, average effective time of irradiation and structure mass in the vessel, uncertainty analysis was made to evaluate the effects of these parameters to IVR effectiveness. The analysis results indicate that in the case of larger break accident and longer irradiation time, safety margins of the pressure vessel wall to thermal failure are smaller; in addition, properly increase structures mass in the pressure vessel can enhance IVR effectiveness.

Key words:  in-vessel core debris retention (IVR), accident mitigation, 2-layer lumped parameter model, uncertainty

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