Method for treating thermocouple conduit leakage in in-core instrumentation system and welding bracket

Abstract

The invention relates to a method for treating a thermocouple conduit leakage in an in-core instrumentation system. The method comprises the following steps of cutting a second portion of the leakingthermocouple conduit, drilling a conduit seat to form a filling hole and forming a circular corner at the connecting joint between the side wall of the filling hole and the bottom of the filling hole,arranging a plug with a chamfer in the thermocouple conduit and sealing the thermocouple with the plug to make the circular corner and the chamfer form a groove, and carrying out welding and sealingon the groove. The above method effectively solves the problem of the leakage of the thermocouple conduit in the in-core instrumentation system. Besides, during the welding, the root of a welding seamis easily exposed to the viewing angle range of a welder, and a tungsten pole can overcome space obstacle to more easily reach the root of the welding seam so that the quality of the root of the welding seam is greatly improved. The invention also provides a welding bracket used for the above method, the welding bracket is used for placing an operator's hand to make the welding more stable, makethe controlled welding accuracy higher and ensure the welding quality.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a treatment method for leakage of a thermocouple conduit in a core measurement system and a welding bracket. Background technique [0002] With the gradual shortage of global energy, in order to respond to energy conservation, environmental protection, and emission reduction, countries around the world are vigorously accelerating the development of nuclear power energy. However, with the development of nuclear power energy, the issue of nuclear leakage has become the focus of attention. During the production process of nuclear power plants, the thermocouple conduit in the core measurement system will have leakage problems. [0003] Since the gap between the thermocouple tubes in the core measurement system and the diameter of the thermocouple tube itself are extremely small, it is difficult for the welding torch to be aimed at the root of the weld seam, and the adjacent th...

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to address the problem of how to make the leakage of the thermocouple conduit in the core measurement system more convenient, and provide a processing method and welding bracket for the leakage of the thermocouple conduit in the core measurement system

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