基于ASME和RSE-M规范的含平面缺陷奥氏体不锈钢核级管道剩余寿命预测方法的数值对比研究

Numerical Comparison Study on Residual Life Specification Prediction Methods of Austenitic Stainless Steel Nuclear Piping with Planar Defects Based on ASME and RSE-M Regulations

核级管道在加工和安装环节可能存在不同的缺陷。此外,由于核电厂运行条件的影响,管道中可能存在少量缺陷,如裂缝。需要合理预测评估含缺陷管道的剩余寿命,以便安排更换方案,避免对核电厂的效率造成严重影响。本文根据ASME和RSE-M规范,在应力强度因子计算、裂纹扩展分析和裂纹稳定性评价等环节,通过数值对比研究了含有平面缺陷的奥氏体不锈钢核级管道的剩余寿命评估方法,为类似工作提供参考。

There were different defects possibly existing in the processing and installation of nuclear piping. In addition, there may be a small amount of defects such as cracks existing in the piping due to the effect of operation conditions in the nuclear power plants. The residual life of nuclear piping with planar defects needs reasonable evaluation and prediction, so as to arrange the replacement program, and to avoid a serious impact on the efficiency of the nuclear power plants. In accordance with ASME and RSE-M codes, the method of residual life evaluation for austenitic stainless steel nuclear piping with planar defects was studied by numerical comparison in stress intensity factor calculation, crack growth analysis and crack stability evaluation in this paper, and the reference experience was provided for similar work.