A 150-kV X-ray equipment for the radiography of circumferential welds in gas-turbine rotors

The paper describes the design, construction and test results of a 150-kV 50-c/s continuously-evacuated X-ray equipment built to replace the radium-bomb method for the radiography of circumferential welds in a hollow fabricated drum or pipe in which the interior was not accessible for the insertion of cassettes using an external source of radiation.