In-pipe cutting device for heat transfer surface pipe of reactor steam generator

Abstract

The invention provides an in-pipe cutting device for a heat transfer surface pipe of a reactor steam generator. The cutting device comprises a rotating component, a cutter feeding component and an electric control system, wherein the rotation component and the cutter feeding component are mutually connected through a brake cable steel wire and are respectively connected with the electric control system through conducting wires. When the in-pipe cutting device provided by the invention is adopted, the cutting of the heat transfer surface pipe of the steam generator can be realized on the premise of not damaging the steam generator structure. The device has the advantages that the remote control of the cutting operation on the heat transfer surface of the steam generator can be realized, the automation degree of the heat transfer surface pipe sampling of the steam generator is improved, and in addition, the labor intensity of operators and the radiation illuminated quantity are effectively reduced.

Description

technical field [0001] The invention relates to an inspection and cutting device for the heat transfer surface tube of a nuclear reactor steam generator, in particular to an inner cutting device for the heat transfer surface tube of the reactor steam generator. Background technique [0002] The primary side pressure boundary of the nuclear reactor steam generator accounts for about 70% of the entire reactor coolant pressure boundary. Due to the long-term erosion and corrosion of the water flow and its special working conditions, the steam generator is the equipment with a high accident rate in the reactor. When the heat transfer surface tube is corroded and leaked, in order to analyze the cause of the damage, several sections of the corroded tube must be taken out as samples for metallographic research, so as to determine the damage mechanism and maintenance technology. For the steam generator that needs to be reused, its external structure cannot be damaged, and it can only...

AI Technical Summary

Problems solved by technology

This device has the following disadvantages when performing in-pipe cutting: all manual operations, low degree of automation; the operator takes a long time to sample in the radioactive area, and the exposure dose to the personnel is large

[0004] After searching, there is no report on the internal cutting device of the heat transfer surface tube of the reactor steam generator

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