本报告描述了对三个故意存在缺陷的焊接件进行的13组循环检查中获得的超声波检查数据的两种分析方法。检查的目的是确定使用固定程序独立检测、定位和确定焊接缺陷尺寸的准确性。该程序基于ASME锅炉和压力容器规范席十一号的要求，用于超声检查核容器，要求使用指定的超声波束角从指定方向进行多次检查。 为了模拟现场在役检查中遇到的限制条件，对这些要求进行了严格控制，以限制可使用的试样表面和搜索路径。这些焊接件是PVRC无损检测小组委员会准备的一系列产品的一部分，用于评估大截面焊缝的超声波、射线和先进体积检测方法。在本程序中，检查的焊缝由24个- 进来-8英寸长对焊-厚平板和两个8英寸全熔透喷嘴焊缝。基板；其中一个喷嘴底板形成在半径上，以模拟壳体截面。

This report describes two methods of analysis of ultrasonic examination data obtained in a 13-team round-robin examination of three intentionally flawed weldments. The objective of the examinations is to determine the accuracy of independently detecting, locating, and sizing the weld flaws using a fixed procedure. The procedure, based upon the requirements of Section XI of the ASME Boiler and Pressure Vessel Code, for ultrasonic examination of nuclear vessels, calls for multiple examinations from specified directions using specified ultrasonic beam angles. To provide a simulation of the restrictions encountered in field in-service examinations for which the requirements were intended, the examinations were strictly controlled to limit the specimen surfaces and search paths that could be used. The weldments are part of a series prepared by the PVRC Subcommittee on Nondestructive Examination for use in evaluating ultrasonic, radiographic, and advanced methods for volumetric examinations of heavy-section welds. In this program, the welds examined consist of a 24-in.-long butt weld in 8-in.-thick flat plate and two full-penetration nozzle welds in 8-in. base plates; one of the nozzle base plates is formed on a radius to simulate a shell section.