秦山CANDU-6重水堆压力管变形对延寿的影响研究

为了论证秦山CANDU-6重水堆（HWR）压力管二阶段延寿的可行性，通过唐氏变形方程计算和数据拟合等方法对压力管二阶段延寿中尺寸变化（轴向伸长、径向膨胀、壁厚减薄）的影响进行了全面分析，并对压力管尺寸变化的各项因素给出了明确的评定准则和评价结论。结果表明，压力管径向膨胀可能成为压力管寿命延长的制约因素，并针对此制约因素给出了相关的影响分析和应对建议措施。本研究为秦山第三核电厂CANDU-6重水堆压力管二阶段延寿工作奠定了基础。 

Study on the Influence of Pressure Pipe Deformation on Life Extension of QINSHAN CANDU-6 HWR

In order to prove the feasibility of the second stage life extension of pressure pipe in Qinshan CANDU-6 heavy water reactor (HWR), the influence of the size change (axial extension, radial expansion and wall thickness thinning) in the second stage life extension of pressure pipe is analyzed comprehensively by means of Tang deformation equation calculation and data fitting, and the evaluation criteria and evaluation conclusions are given for the factors of the change of pressure pipe size. The results show that the radial expansion of the pressure pipe may be the restraining factor for the life extension of the pressure pipe. In view of this restraining factor, this paper gives the related influence analysis and countermeasures. This study lays the foundation for the second stage life extension of the pressure pipe of Qinshan No. 3 Nuclear Power Plant.