核电站常规岛管道表面裂纹缺陷分析及处理
张金平，薛源，田甜，王均增
（中广核工程有限公司 设备采购与成套中心，广东 深圳 518124）
摘要：在某核电站建设过程中，部分常规岛管道表面探伤检验时发现存在裂纹状缺陷，经取样进行缺陷形貌和组织等分析，确定了缺陷为表面裂纹缺陷、产生原因与钢纯净度、坯料的表面状态及钢管固有的轧制性能、管件制造工艺等各项因素有关。在分析缺陷产生原因的基础上，通过提高钢的纯净度、加大钢管表面无损检测力度、优化管件制造工序等措施，解决了该问题。
关键词：核电；管道；裂纹
中图分类号：TG21+3 文献标志码：B 文章编号：1006－0316 (2014) 01－0078－03
Analysis and disposal of surface cracks on conventional island piping of nuclear power plant
ZHANG Jin-ping，XUE Yuan，TIAN Tian，WANG Jun-zeng
( Equipment Procurement & Supply Division, China Nuclear Power Engineering Company Ltd.,Shenzhen 518124, China )
Abstract：Surface cracks are found on the surface of conventional island piping of Nuclear Power Plant during construction. The cracking correlated to purity of steel, surface condition of raw material and manufacture working procedure of fittings were analyzed by some experimental methods such as microstructure and crack morphology observation. Based on the analysis result, disposal and improved measures such as improving purity of steel, increasing the NDT scale of pipe surface, optimizing the manufacture working procedure of fittings are used to solve the problem.
Key words：nuclear power；pipe；cracks
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收稿日期：2013－06－24
作者简介：张金平（1979－），男，湖北随州人，硕士，工程师，主要从事大宗材料的合同执行工作。
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