| 摘要 |
PURPOSE:To easily detect the abnormality of a structure, by striking an object to be inspected by a standard impact device to measure the vibration and sound of the object to be inspected by a vibration sensor and a sound sensor and comparing the same with measured data at a healthy time. CONSTITUTION:A gas-water separator 7 is mounted on the shroud head 6 of a BWR plant and placed in a water pool 4. Further, a vibration sensor 1A and a standard impact device 2A are provided to the shroud head 6. A vibration sensor 1C and a standard impact device 2C are provided to the gas-water separator 7 and a vibration sensor 1B is provided to a stand pipe 8. A sound sensor 3 is provided to the wall surface of a pool 5 and the shroud head 6 is stuck by the standard impact devices 2A, 2C to measure the vibration and sound of the shroud head 6 by the vibration sensors 1A, 1B, 1C and the sound sensor 3. The measuring signals are analyzed by a vibration analyzer 13 and a sound analyzer 11 to be compared with the signals at a soundness time by a comparator 14 to evaluate a flaw. Since the shroud head is struck under a definite condition and the wave forms of the vibration and sound thereof are analyzed, the abnormality of an object to be inspected can be easily judged. |
