Temperature field measurement experimenting device and method for break accident of liquid metal reactor heat exchanger

Abstract

The invention discloses a temperature field measurement experimenting device and a temperature field measurement experimenting method for a break accident of a liquid metal reactor heat exchanger. The temperature field measurement experimenting device consists of a liquid metal storage tank (1), a liquid metal valve (2), a reaction vessel (3), a high-pressure water pipeline (4), a thick-wall corrugated pipe (5), a pneumatic hydraulic pump (6 ), a thermocouple conduit (7), a thermocouple cluster (8), a heating wire (9), a thermocouple hanging bracket (10), thermocouple welding points (11) and a protective gas pipeline (12). Through upward movement of the pneumatic hydraulic pump (6), the high-pressure water pipeline connected with the thick-wall corrugated pipe and provided with a precrack is pulled apart so as to achieve a fixed-point break of the pipeline in a high-temperature and high-pressure medium and micro sealing of the high-pressure reaction vessel; through point welding of ends of thermocouples at multiple points on the hanging bracket, an omni-directional three-dimensional matrix measurement on a temperature transient of the high-temperature and high-pressure medium can be achieved. A multi-medium coupling temperature field measurement method has an important scientific value and engineering significance.

Description

technical field [0001] The invention relates to the technical field of measuring the temperature field of a liquid metal reactor heat exchanger breach accident, in particular to a device and method for measuring the temperature field of a metal reactor heat exchanger breach accident. Background technique [0002] In view of the continuous depletion of world energy and the global society's panic about nuclear safety after the Fukushima accident, various research institutions in the world are vigorously developing accelerator-driven subcritical system (ADS) lead-bismuth liquid metal cooling reactors to realize transmutation processing of high-level nuclear waste, Production of nuclear fuel and other functions. At present, it is recognized by the world as one of the most potential possible ways to dispose of a large amount of radioactive waste and reduce the risk of deep burial storage. [0003] The ADS system is mainly composed of a proton accelerator system, a spallation tar...

AI Technical Summary

Problems solved by technology

Because ADS generally chooses to immerse the steam generator directly into the lead-bismuth primary circuit, when the heat exchanger pipe breaks, the high-pressure cooling water in the secondary circuit of the heat exchanger directly contacts with the lead-bismuth alloy, resulting in a strong interaction. It may lead to rapid overcooling of the lead-bismuth alloy on the surface in contact with water, resulting in solidification, preventing the flow of surrounding liquid metal, and then causing local heat transfer tube blockage, deteriorating heat transf

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