压水堆核燃料棒环焊缝及堵孔点的数字射线检测  

Digital radiographic testing of circumferential weld seams and plug holes points in PWR nuclear fuel rods

作　　者：李平 黄帆 曹晖 LI Ping;HUANG Fan;CAO Hui(CNNC Jianzhong Nuclear Fuel Co.Ltd.,Yibin 644000,China)

机构地区：[1]中核建中核燃料元件有限公司,宜宾644000

出　　处：《无损检测》2024年第7期30-33,共4页Nondestructive Testing

摘　　要：压水堆核燃料棒是核电站使用最多的一种燃料元件,需求数量逐年增加,为提高压水堆核燃料棒环焊缝及堵孔点的检测效率和质量,对其进行了数字射线检测试验。试验结果声明,其检测图片灵敏度最高可达0.25 mm,图像分辨率达D11,归一化信噪比为122,燃料棒缺陷图片与胶片试验、金相试验结果一致;该检测方法能满足燃料棒的质量评价要求。The pressurized water reactor fuel rod is the most commonly used fuel element in nuclear power plants.Its demand is increasing year by year.To improve the efficiency and quality of weld seam and plug hole points detection for pressurized water reactor nuclear fuel rods,digital radiographic testing was conducted.The test results showed that the sensitivity of detection images can reach up to 0.25mm,image resolution can reach up to D11,and normalized signal-tonoise ratio is 122.The images of fuel rod defects were consistent with the results of film and metallographic tests.It was verified that the detection method met the quality evaluation requirements of fuel rods.

关 键 词：数字射线检测 压水堆 燃料棒 环焊缝 

分 类 号：TG115.28[金属学及工艺—物理冶金]