Device and method for measuring temperature of outer wall of supercritical water-cooled reactor coolant channel inner pipe

Abstract

The invention relates to a device and a method for measuring the temperature of the outer wall of a supercritical water-cooled reactor coolant channel inner pipe. The problems of slow response, largemeasurement error and high measurement point arrangement difficulty of a traditional wall surface temperature measurement method are solved. The temperature measuring device comprises a sealing unit and a temperature measuring unit; the sealing unit comprises a guide pipe, a base, a bottom extrusion pad, a sealing pad, a top extrusion pad and an extrusion nut; one end of the guide pipe is fixedlyconnected with the outer wall of a coolant channel outer pipe and is communicated with the coolant channel outer pipe, and the other end of the guide pipe is fixedly connected with the base; the bottom extrusion pad, the sealing pad and the top extrusion pad are sequentially arranged in the base from inside to outside, and are pressed in the base through the extrusion nut; the sealing pad is madeof a nonmetallic elastic sealing material; and the temperature measuring unit comprises at least one thermocouple, one end of the thermocouple is fixed to the outer wall of the coolant channel inner pipe, and the other end of the thermocouple sequentially penetrates through the coolant channel outer pipe, the guide pipe, the base, the bottom extrusion pad, the sealing pad, the top extrusion pad and the extrusion nut and then is led out.

Description

technical field [0001] The invention relates to a temperature measuring device and a measuring method, in particular to a temperature measuring device and a method for measuring the temperature of the inner tube outer wall of a supercritical water-cooled reactor coolant channel. Background technique [0002] The supercritical water-cooled reactor was selected by the Fourth Generation International Forum as one of the six types of long-term development. Compared with the existing pressurized water reactor, the technical performance of the supercritical water-cooled reactor is relatively superior. At present, the system pressure of a supercritical water-cooled reactor is greater than 22.1MPa, and the core outlet temperature reaches above 500°C. During the flow and heat transfer process of supercritical water, under certain wall heat flux density and mass flow rate conditions, various heat transfer will occur. Features, including heat transfer enhancement, normal heat transfer,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a supercritical water-cooled reactor coolant channel inner tube outer wall temperature measuring device and method to solve the problems of slow response time, large measurement error, and difficult arrangement of measuring points in traditional wall surface temperature measurement methods

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