Abstract: An apparatus to measure external dimensions of a fuel channel of a boiling water reactor, having a rigid frame which has a lower seat to accept a nozzle of a nuclear fuel assembly, the rigid frame extending an entire length of the nuclear fuel assembly, an inspection arrangement including ultrasonic transducers placed upon the rigid frame, the ultrasonic transducers supported by the rigid frame, the ultrasonic transducers configured to generate and receive ultrasonic signals imparted into a medium and generate an electrical signal upon receipt of the ultrasonic signal, a signal processing arrangement configured to evaluate electrical signals received from the inspection arrangement, and a series of leads connected to the arrangement of ultrasonic transducers, the series of leads taking the electrical signals generated by the inspection arrangement of ultrasonic transducers and transporting the electrical signals from the ultrasonic transducers to the signal processing arrangement.

Abstract: An apparatus to measure external dimensions of a fuel channel of a boiling water reactor, having a rigid frame which has a lower seat to accept a nozzle of a nuclear fuel assembly, the rigid frame extending an entire length of the nuclear fuel assembly, an inspection arrangement including ultrasonic transducers placed upon the rigid frame, the ultrasonic transducers supported by the rigid frame, the ultrasonic transducers configured to generate and receive ultrasonic signals imparted into a medium and generate an electrical signal upon receipt of the ultrasonic signal, a signal processing arrangement configured to evaluate electrical signals received from the inspection arrangement, and a series of leads connected to the arrangement of ultrasonic transducers, the series of leads taking the electrical signals generated by the inspection arrangement of ultrasonic transducers and transporting the electrical signals from the ultrasonic transducers to the signal processing arrangement.