核电厂大型废液储罐内外壁均涂有防腐蚀涂层，经长期使用存在涂层脱落、损坏等问题。此类大型储罐的手动壁厚监测、检测存在工期长、准备工序复杂等问题以及放射性沾污风险。超声自动扫查设备适于对被检试件进行系统性检测，也可以结合其他检测方法进行针对性或跟踪性检测。采用该技术对废液储罐进行超声C扫查测厚具有检测效率高、工期短、作业风险小、检查结果直观、成像分辨率高等特点。特别适合检测和分析由于冲蚀、腐蚀、磨蚀引起的壁厚减薄问题。

Large waste solution tanks in nuclear power plants are usually protected by painting both inside and outside. Degradation, such as peeling and damaging, may occur as time passing. Systemic thickness monitoring and inspecting of these tanks contain several concerns including complexity, time consuming and potential radiation contamination. An effective method, automatic scan system, can be used to both systematic inspection and pointing or tracking inspection. Application of this technique to waste water tanks have some advantages including high efficiency, short term, minimized field risk, direct image result and high resolution. This technique is quite suitable for detecting and analyzing the wall thinning caused by corrosion, erosion and abrasion.