Experimental device and method for researching jet flow impact characteristics of reactor core outlet of fast reactor

Abstract

The invention relates to an experimental system and method for researching jet flow impact characteristics of a fast reactor core outlet, and the system comprises a jet flow impact main loop composed of a water storage tank, a plunger pump, a filter, a preheater, a jet flow impact chamber, a heat regenerator, a condenser, a valve, a flow meter and pipelines connecting the devices, a cooling loop composed of a cooling tower, a cooling pump, a regulating valve and a flow meter, and a water replenishing loop composed of a deionized water machine, a water replenishing tank and a plunger pump. Water in the water storage tank flows to the heat regenerator through the plunger pump, is primarily heated by the heat regenerator and then is divided into three branches to flow to a jet flow impact container, the opening degrees of the stop valves in the different branches and the heating power of the preheater are different, so that branches under different temperature and flow conditions are achieved, finally, the branches enter the jet flow impact chamber, cold fluid and hot fluid are stirred and mixed, and then the water flows through the heat regenerator and the condenser and finally returns to the water storage tank to form closed circulation. According to the invention, a jet impact experiment under a large-range temperature difference and flow working condition can be realized.

Description

technical field [0001] The invention belongs to the technical field of fast reactor cores, and in particular relates to an experimental device and an experimental method for studying the jet impact characteristics of the fast reactor core outlet. Background technique [0002] The fast reactor uses liquid liquid metal as the coolant, which has good economy and inherent safety. Fast reactor core assemblies mostly adopt a box design, which is a typical closed fuel assembly design form. The temperature of the coolant flowing out from different components (such as fuel assemblies, control rod assemblies, and breeding zone assemblies) is different. The flow state of the exit area It's complicated. The hot and cold fluids are mixed with each other at the outlet of the core in the form of jets. Insufficient mixing causes the temperature pulsation of the coolant. The temperature pulsation of the coolant will be transferred to the surface of the adjacent solid structure through heat ...

AI Technical Summary

Problems solved by technology

[0004]Actually, there are still many experimental researches at home and abroad on the phenomenon of fluid jet mixing at different temperatures, but they all focus on the jet impact process of a simple channel, which is different from the actual fast The structure of the core outlet of the stack is quite different, and the impact of the coolant jet impact on the central measurement column of the upper core chamber is not considered

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