标准化残差法在判别RPV冲击转变曲线异常点中的应用

核电站采用辐照监督管内夏比试样的冲击韧性来评估RPV的断裂韧性值，但由于冲击试验是在动态加载条件下进行测试，结果往往有较大的分散性，依据冲击韧性拟合的韧脆转变曲线的精度会受到限制。采用标准化残差法对国产RPV冲击功的回归韧脆转变曲线上的异常值进行剔除后发现，拟合精度提高，不确定度相应降低。在实际应用中，如出现异常点，可考虑进行补充试验。

Application of Standardized Residual Method in Identification of Outlier in Ductile Brittle Transition Curve of RPV

Fracture toughness of nuclear reactor pressure vessel is evaluated by the impact toughness of charpy impact specimens in surveillance capsule in NPP. However, the results under impact condition are obviously dispersed, which limits the fitting precision of the ductile brittle transition curve. Standardized residual method was utilized to pick out the outlier data. Fitting precision was improved in the optimized curve, and the uncertainty became lower. Supplementary experiments can be conducted when the outlier data is found in practice.