Ultrasonic longitudinal wave flaw detection method and acceptance criteria for nuclear shielded gray iron castings

This document outlines specific technical requirements and procedures for the non-destructive examination of nuclear radiation shielding components manufactured from gray cast iron. It focuses exclusively on the application of ultrasonic longitudinal wave testing methods to detect internal discontinuities within these cast products. The text provides detailed methodologies for equipment calibration, test surface preparation, and the interpretation of ultrasonic signals to ensure the integrity of the components used in nuclear environments. Furthermore, it establishes clear acceptance and rejection criteria based on the size, location, and nature of detected indications. The guidelines are designed to support quality assurance processes for the fabrication of shielding materials, ensuring that all inspected items meet the necessary safety and performance standards before deployment. This specification serves as a reference for evaluating the internal soundness of gray iron castings through precise ultrasonic analysis techniques, facilitating consistent inspection practices across the industry.