Fluoride salt cooling pebble bed high temperature reactor core flow heat transfer simulation experiment system

Abstract

The invention discloses a villiaumite cooling ball bed high-temperature stack core flowing heat exchange simulating experiment system. The system can perform two experiments of Dowtherm A heat-conducting oil flowing and heat exchange and can simulate the flowing heat exchange characteristic of high-temperature villiaumite under the working condition of low temperature. The experiment system can perform flowing experiment and heat transfer experiment on high Prandtl number heat-conducting oil in a bed ball channel and can realize flowing and heat exchange simulation of the villiaumite cooling ball bed high-temperature stack core FLiBe; and the experiment system has the advantages of high safety, high experiment data precision, low operating cost and the like.

Description

technical field [0001] The invention belongs to the technical field of experimental devices, and in particular relates to a fluorine salt cooling pebble bed high temperature reactor core flow heat transfer simulation experiment system. Background technique [0002] The fluoride-salt cooled pebble bed high-temperature reactor is a candidate for the fourth-generation nuclear reactor. It has unique advantages in terms of security and nuclear proliferation. The fluorine salt cooling pebble bed high temperature reactor core takes away the heat generated by the spherical fuel elements through the coolant FLiBe. FLiBe is a high Prandtl number fluid (at 600-700°C, the Prandtl number is 12-20), and its flow and heat transfer characteristics in the pebble bed core are similar to those of low Prandtl number fluids such as water and helium. big difference. The design, operation and safety assessment of the fluoride-salt cooled pebble bed high-temperature reactor require a deep unders...

AI Technical Summary

Problems solved by technology

In recent years, the Oak Ridge National Laboratory of the United States and the Shanghai Institute of Applied Physics of the Chinese Academy of Sciences have established a molten salt FLiNaK experimental circuit, but no good experimental results have been obtained.

The operating temperature of fluoride salt is too high, and the melting point is also higher than 400°C. High temperature fluoride salt is very corrosive to pipelines. It is difficult and costly to carry out fluoride salt experiment.

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