Patent Number: 047175303
Section: abstract

The process involves introducing into the structure (1) immersed in water, in the vicinity of the component (9) to be monitored, a means (30) of injecting water at a pressure higher than 40 MPa and in the form of a straight jet of a diameter less than 3.times.10.sup.-3 m. The injection means (30) is subsequently directed towards the component (9) to be monitored, and water is injected under pressure in such a way that the jet reaches the component (9). The position of the component after the action of the jet is monitored by a televisual means. When the pins of a guide tube (1) are to be monitored, the device also has, in addition to the televisual inspection means, a very long tube (30), in which an injection device having a nozzle in its lower part is arranged.