| 摘要 |
PURPOSE:To detect the erosion and internal condition of a nozzle and to improve productivity by dealing with the same quickly, by inserting a heat shielding plate at right angles to the longitudinal direction of the nozzle in a hot state, irradiating an X-ray to the nozzle and detecting the same through the heat shielding plate in front of a detector. CONSTITUTION:A detector 2 is provided in the position faced to an X-ray source, and a heat shielding plate 5 and an immersion nozzle 4 are set therebetween, whereafter an X-ray is irradiated thereto and the transmitted X-ray is detected with the detector 2. The internal condition is detected from the sectional image. A gamma ray may be used for an X-ray irradiating device 1, but the X- ray suffices in terms of handling, control and the material of the nozzle 4. Either a direct method or an indirect method is adaptable for the detector 2; the former is better in conversion efficiency hence resolution. A film 3 is installed roughly in the same position as the position of the detector 2, and is photographed. The plate 5 protects the device 1, the ray source, the detector 2, and the film 3 against the high-temp. nozzle 4. |
