核电汽轮机叶轮叶根槽应力腐蚀裂纹超声相控阵检测技术  

Ultrasonic Phased Array Inspection Technology for Stress Corrosion Cracks in Impeller Root Grooves of Nuclear Steam Turbines

作　　者：王金华 李思琦 吴奇太 杨敏 贺志清 Wang Jinhua;Li Siqi;Wu Qitai;Yang Min;He Zhiqing(China Nuclear Power Operation Management Co.,Ltd.,Jiaxing 314303,Zhejiang Province,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China;State Nuclear Power Plant Service Company,Shanghai 200233,China)

机构地区：[1]中核核电运行管理有限公司,浙江嘉兴314303 [2]上海发电设备成套设计研究院有限责任公司,上海200240 [3]国核电站运行服务技术有限公司,上海200233

出　　处：《发电设备》2024年第4期264-268,共5页Power Equipment

摘　　要：核电汽轮机叶轮叶根槽是应力腐蚀的易发生部位,要定期进行无损检测,然而在实际检测中,由于叶轮叶根槽结构复杂、空间受限,检测结果往往难以反映叶根槽表面真实情况.针对核电汽轮机叶轮叶根槽的检测问题,提出了一种超声相控阵检测方案,按照1∶1加工设置人工缺陷的叶轮叶根体试件,通过CIVA仿真平台确定试验设备及扫查方式,对试件进行4次缺陷检测.试验结果表明:该方案能够识别出全部人工缺陷,并且能实现缺陷的定位和定量,具有较高的检测精度和可行性,能够有效保障核电汽轮机的安全运行.The impeller root groove of nuclear steam turbine is a stress corrosion susceptible part,which should be subjected to nondestructive testing periodically.However,in actual testing,the impeller root groove is tested in an environment with complex structure and restricted space,and the testing results are difficult to reflect the real situation of the root groove surface.Therefore,an ultrasonic phased array inspection scheme was proposed for the inspection of the impeller root groove of nuclear steam turbine.The impeller-root body specimen with artificial defects was processed according to 1∶1,and the test equipment and sweeping method were determined by CIVA simulation platform.Meanwhile,the defects were detected for four times on the specimen.Experimental results show that the scheme can identify all artificial defects and realize the localization and quantification of defects,while which has a high detection accuracy and feasibility.The safe operation of nuclear steam turbine can be effectively ensured with this technology.

关 键 词：核电汽轮机 叶轮叶根槽 超声相控阵 无损检测 

分 类 号：TK268[动力工程及工程热物理—动力机械及工程] TM623.7[电气工程—电力系统及自动化]