Apparatus and method for automatically and remotely measuring the internal gap of a reactor

Abstract

The present invention relates to a remote, precise gap-measuring apparatus for automatically measuring the gap between reactor internals comprising a nuclear reactor vessel, a core support barrel, a core shroud and a lower support structure, the remote, precise gap-measuring apparatus comprising one and more digital probes measuring a gap between a nuclear reactor vessel protrusion and a core support barrel protrusion, the nuclear reactor vessel protrusions being disposed on an inner surface of the nuclear reactor vessel, the core support barrel protrusions being disposed on an outer surface of the core support barrel and engaged with the nuclear reactor vessel protrusions; a computer coupled to the digital probes to display and store a measured value of the gap measured by the digital probes; and a solenoid valve controlled by the computer, the solenoid valve controlling compressed air supplied through an air hose to operate the digital probe, wherein the digital probes measure the gap after the core support barrel, the core shroud and the lower support structure are welded to each other, thereby decreasing the construction period and simplifying the construction process.

Description

technical field [0001] The present invention relates to a remote and accurate gap measuring device for automatically measuring the gap between reactor internal components, and more particularly to such a remote and precise gap measuring device which can be used during the construction of a nuclear power plant when When the core support cylinder, core shroud and lower support structure are assembled and installed in the nuclear reactor vessel, the gap is automatically measured so that the gap between the nuclear reactor vessel protrusion and the core support cylinder protrusion meets the allowable clearance requirements . Background technique [0002] figure 1 A transverse cross-sectional view showing the internals of a conventional reactor. figure 2 A longitudinal section showing conventional reactor internals. image 3 It is a partial cross-sectional view, showing the gap 9 between the core support tube protrusion 7 and the nuclear reactor vessel protrusion 8 in a conve...

AI Technical Summary

Problems solved by technology

[0034] In the traditional process of measuring the gap 9, since it takes a long time to manually measure 72 points of the gap in a small space, the measurement cycle and construction cycle increase accordingly

[0035] In addition, in the traditional process of measuring the gap 9, it is difficult to obtain objective measurement values ​​because the measurer has to measure 72 points in a very narrow space

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