Visual experimental system for fragmentation behaviors of reactor core melts in severe accidents of sodium cooled fast reactors

Abstract

The invention relates to a visual experimental system for fragmentation behaviors of reactor core melts in severe accidents of sodium cooled fast reactors. The visual experimental system comprises a support, a temperature-controllable annular resistance wire heating furnace, a first high-temperature melt pneumatic valve, a pressurized heat supplementing pipe, a second high-temperature melt pneumatic valve, a visual experimental container and a fragmented-product collector. The temperature-controllable annular resistance wire heating furnace is arranged on the support, the top of the first high-temperature melt pneumatic valve is connected with the bottom of the temperature-controllable annular resistance wire heating furnace, the top of the pressurized heat supplementing pipe is connectedwith the bottom of the first high-temperature melt pneumatic valve, the top of the second high-temperature melt pneumatic valve is connected with the bottom of the pressurized heat supplementing pipe,the visual experimental container is arranged below the second high-temperature melt pneumatic valve, and the fragmented-product collector is arranged in the visual experimental container made of a transparent material.

Description

technical field [0001] The invention relates to the technical field of nuclear energy, and more particularly relates to a visual experiment system for the fragmentation behavior of core molten material during a serious accident of a sodium-cooled fast reactor. Background technique [0002] Compared with the second-generation and third-generation reactors, the fourth-generation nuclear energy system is an advanced nuclear energy system with higher safety, stronger economic competitiveness, less nuclear waste and effective prevention of nuclear proliferation. The "Generation IV Nuclear Energy System International Forum (GIF)" established in 2001 selected six types of the most promising Generation IV reactor types, among which the sodium-cooled fast reactor has good breeding characteristics and the most abundant construction and operating experience, has become the "No. 1 seed player" in the fourth-generation nuclear energy system in the world. Although the probability of a se...

AI Technical Summary

Problems solved by technology

For the melt release part, this invention does not introduce a pressurized heat supplementary tube, and it is impossible to accurately control the melt release rate by accurately adjusting the pressure in the furnace

Although this invention can realize the analysis of variables such as melt release height, melt temperature and water temperature, it cannot control variables such as the diameter and shape of the melt release liquid column.

At the same time, since it can only be observed from four specific windows, its camera may have dead angles, thus missing some key information about the interaction process between the melt and the coolant

In addition, the fragmentation product collector in this invention can only collect and analyze the fragments as a whole, but cannot collect them in different regions, and cannot further measure and analyze the properties of local fragments, which seriously restricts the understanding of the fragmentation process and mechanism of the melt

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