Development of an Under-Sodium Ultrasonic Scanner for In-Reactor Surveillance

摘要

This document describes a prototype system devised at Hanford Engineering Development Laboratory for reconstructing three-dimensional images of objects or components in liquid sodium cooled nuclear reactors. Because liquid sodium is opaque to visible light, ultrasonic scanning is used to re¬construct a pseudo three-dimensional image that can be used to observe the reactor core region for such purposes as: to identify duct assemblies;evaluating conditions of assem¬blies: to provide calibration backup for handling machinery accuracy and position, etc.