Abstract Mapping of subassembly (SA) heads using down viewing transducers mounted on an under sodium ultrasonic scanner can be used for detection and evaluation of SA bowing. However, due to constraints in the rotating plugs on which the scanner is mounted, the down viewing transducers may not reach on top of all the SAs. For such a scenario, an ultrasonic glancing angle based imaging methodology (GAIM) is developed in the present paper for assessment of SA bowing. The signatures in the ultrasonic signals that can be used for detection of SA head bowing (towards or away) with respect to the ultrasonic transducer are reported in this paper. In addition to the detection of the SA bowing, glancing angle images from two orientations are superimposed to get a better visualization of the honeycomb arrangement of SAs. Further, a method for quantitative estimation of the bowing is also presented.

中文翻译：

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使用掠射角超声成像检测快增殖反应堆组件弯曲

摘要 使用安装在钠下超声扫描仪上的向下观察换能器映射子组件 (SA) 头可用于检测和评估 SA 弯曲。然而，由于安装扫描仪的旋转插头的限制，向下观察的换能器可能无法到达所有 SA 的顶部。对于这种情况，本文开发了一种基于超声掠射角的成像方法 (GAIM)，用于评估 SA 弯曲。本文报告了可用于检测 SA 头部相对于超声换能器的弯曲（朝向或远离）的超声信号中的特征。除了检测 SA 弯曲外，还叠加了来自两个方向的掠射角图像，以获得更好的 SA 蜂窝状排列的可视化。更多，