Full-automatic high-temperature-melt release mechanism and control method thereof

Abstract

The invention discloses a full-automatic high-temperature-melt release mechanism and a control method thereof. The release mechanism comprises a temporary storage container, wherein the upstream portion of the temporary storage container is connected with a low-pressure container loaded with a smelting furnace through an upstream release pipeline; a protective gate valve and an upstream main sealing valve are sequentially arranged on the portion, from the low-pressure container to the upstream release pipeline of the temporary storage container, of the temporary storage container; a downstreamrelease pipeline is arranged on the downstream portion of the temporary storage container, a melt release valve and a downstream main sealing valve are arranged on the downstream release pipeline, the melt release valve is arranged on the side close to the temporary storage container, and the downstream main sealing valve is arranged on the side away from the temporary storage container; the temporary storage container and downstream devices thereof are arranged in a bottom high-pressure container; and the temporary storage container separately communicates with the low-pressure container, the bottom high-pressure container and a pressure source through pressure balance pipelines. The problem that high-temperature melt is difficult to transfer from a low-pressure environment to a high-pressure environment is solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical automation, and in particular relates to a fully automatic release mechanism for high-temperature molten matter and a control method thereof. Background technique [0002] In the study of the mechanism of severe accidents of nuclear reactors, when conducting experiments on the interaction between core melt and coolant, it is necessary to release high-temperature melt (≥1000°C) from an atmospheric melting furnace into a water pool in a pressure vessel for testing. During the transfer process, if the high-temperature molten material is in contact with pipes and valves for a long time, it will cause problems such as high-temperature yield of steel components, failure of pressure-bearing seals, and inability of valves to operate; at the same time, high-temperature molten material contacts steel components. When it is on the wall, it will form a hard shell to cover the wall after solidification, whi...

AI Technical Summary

Problems solved by technology

During the transfer process, if the high-temperature molten material is in contact with pipes and valves for a long time, it will cause problems such as high-temperature yield of steel components, failure of pressure-bearing seals, and inability of valves to operate; at the same time, high-temperature molten material contacts steel components. When the wall surface is closed, a hard shell will be formed to cover the wall surface after solidification, which will greatly affect the difficulty of movement and pressure sealing at the valve.

[0003] In the face of these technical difficulties, the current experimental techniques are divided into two categories: one is to choose to reduce the pressure in the bottom pressure vessel to normal pressure, without setting a release mechanism, and the high-temperature melt is directly released from the melting furnace into the bottom experimental vessel. This design does reduce the difficulty of release, but it makes the system pressure conditions of the bottom experimental vessel unable to simulate the actual accident conditions well, and does not have the function of pressure adjustment; the other is to choose to put the melting furnace into the In the pressure vessel, when the melt is released, the upper and lower pressure vessels are connected, and the time and space for the melt to contact the release mechanism are shortened as much as possible. However, this design allows the steam and explosion shock waves generated in the bottom vessel to spread to the top vessel. Interference and damage to electrical equipment such as melting furnaces in pressure vessels

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