文献类型：期刊文献

中文题名：含周向内表面裂纹核电管道CEGB-R6选择2失效评定曲线研究

英文题名：Study on CEGB-R6 Option 2 Failure Assessment Curve of Nuclear Power Pipeline with Circumferential Inner Surface Crack

作者：刘长军[1];刘俊杰[1];张静[2];谈建平[1];王东辉[2]

机构：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237;[2]国核电站运行服务技术有限公司,上海200233

年份：2020

卷号：37

期号：7

起止页码：19

中文期刊名：压力容器

外文期刊名：Pressure Vessel Technology

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：国家重点研发计划(2018YFC0808800);国家自然科学基金(11502082);国家科技重大专项项目(2015ZX06002005);核反应堆系统设计技术重点实验室资助。

语种：中文

中文关键词：失效评定图法;改进的选择2失效评定曲线;J积分估算法;含周向内表面裂纹管道;有限元法

外文关键词：failure assessment diagram method;modified option 2 FAC;J integral estimation method;pipeline with circumferential inner surface crack;finite element method

摘要：针对CEGB-R6选择2失效评定曲线存在精度欠缺问题,从J积分估算方法入手,分析了含周向内表面裂纹管道的H 1(n)/H 1(n=1)与硬化指数n、裂纹尺寸的分布规律。基于先前提出的改进的EPRI-J积分估算方法,推导获得了改进的选择2失效评定曲线。采用实际核电一回路管道材料力学性能数据,将R6选择2失效评定曲线、改进的选择2失效评定曲线与不同裂纹尺寸对应的有限元失效评定曲线进行比较,结果表明改进的选择2曲线精度优于R6选择2曲线,解决了R6选择2曲线在特定情况下评价精度不足问题。
For the problem of lack of assessment precision when using CEGB-R6 option 2 failure assessment curve(FAC)under certain circumstances,starting from J integral estimation method,the distribution laws of H 1(n)/H 1(n=1)of pipelines with circumferential inner surface cracks with hardening exponent n and crack size were analyzed.Based on the modified EPRI-J integral estimation method,a modified option 2 FAC was derived.The R6 option 2 FAC and the modified option 2 FAC were compared with the finite element FACs corresponding to different crack sizes using the mechanical properties data of the pipeline material of a nuclear power circuit,the results show that the accuracy of the modified option 2 FAC was better than the R6 option 2 FAC,which solves the problem of lack of assessment precision of R6 option 2 FAC in specific situation.