Experimental system for forming characteristic of sodium-cooled fast reactor debris bed

Abstract

The invention provides an experimental system for the forming characteristic of a sodium-cooled fast reactor debris bed. The experimental system comprises an experimental support, a particle container, a particle conduit, a visual experiment container, a particle release controller, a visual data acquisition module, an environmental parameter detection module and a decay heat simulating generator, wherein the particle container and the particle conduit support multiple release apertures and release heights, an experimental particle system comprises various debris particles with different materials, shapes and sizes, visual experimental containers with different sizes are designed for two-dimensional and three-dimensional experiments, and the particle release controller and the visual data acquisition module can acquire and store images synchronously in the whole experimental process. The experimental system can be applied to researching and analyzing the forming mechanism of the fuel particle debris bed in the sodium-cooled fast reactor core disassembly accident process. The experimental system has the advantages that the experimental process is visual, qualitative analysis is combined with quantitative analysis, multiple controllable experimental variables exist, the operation principle is simple, the system is easy to expand, stable and safe and the like.

Description

technical field [0001] The invention relates to the field of advanced nuclear energy system sodium-cooled fast reactor, in particular to an experimental system for the formation characteristics of a sodium-cooled fast reactor debris bed. Background technique [0002] Compared with the second and third generation reactors, the fourth generation nuclear energy system is an advanced nuclear energy system with better safety, economic competitiveness, less nuclear waste and effective prevention of nuclear proliferation. Because of its good breeding characteristics and the most abundant construction and operation experience, the sodium-cooled fast reactor has become the "No. 1 seed player" in the fourth-generation nuclear energy system in the world, representing the development trend and technological frontier of advanced nuclear energy systems. However, the Chernobyl, Three Mile Island, and Fukushima nuclear accidents in history have repeatedly warned us that although the probabi...

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Problems solved by technology

[0006] 1. The invention described in REF01 does not pay attention to the formation law of the shape of the particle bed during the overall falling process of the particles, and there is no liquid phase, which is significantly different from the formation scene of the debris bed under the condition of a severe accident in the core of the sodium-cooled fast reactor

[0007] 2. Although the invention described in REF02 provides a mechanical design of a sodium-cooled fast reactor core melt collection device, it does not involve key physical phenomena such as the accumulation behavior of the fuel particle debris bed, so its design performance is good Bad still need further experimental test

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