A Molten Salt Heap Upper Chamber

Abstract

The invention discloses a molten salt reactor upper chamber. The molten salt reactor upper chamber comprises a support plate arranged in a reactor core vessel and used as the bottom of the molten saltreactor upper chamber and a cover plate arranged at the top of the reactor core vessel, wherein a plurality of control rod guide openings are formed in the support plate; the reactor core vessel comprises a side tube opening; the side tube opening is located above the support plate and is located under a preset molten salt liquid level; an inert gas inlet tube and an inert gas outlet tube are penetrated through the cover plate; the bottom end of the inert gas inlet tube is located under the preset molten salt liquid level and is higher than the support plate; the bottom end of the inert gas outlet tube is located above the preset molten salt liquid level. The molten salt reactor upper chamber is capable of buffering expansion or shrinkage of the volume of primary circuit fuel salt of themolten salt reactor and preventing the molten salt from being in direct contact with a reactor core upper cover plate by penetrating through welding openings; the molten salt reactor upper chamber does not include control rod sleeve tubes, overflow tubes and overflow tanks, so that the molten salt leakage probability and the difficulty of radiation management can be reduced; meanwhile, the separation and collection efficiency of tritium can be improved.

Description

technical field [0001] The invention relates to the field of nuclear reactor engineering design, in particular to an upper chamber of a molten salt reactor. Background technique [0002] The fuel of the molten salt reactor is in liquid form, which simplifies the loading and unloading process, and has the advantages of online feeding and online fuel separation. But at the same time, it is necessary to focus on the isolation and protection of its high radioactivity. The primary loop of the molten salt reactor acts as the main isolation barrier for the radioactive fuel salt. In addition to strictly controlling the manufacturing and welding quality of primary circuit boundary piping and core vessels, some moving parts such as pumps and control rods need to be strictly sealed, and some welds and penetrations have high design requirements. In addition, the primary circuit must leave enough space for the volume change of the molten salt. The reasons for the volume change of the ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem of molten salt leakage caused by radiation damage and molten salt corrosion at the control rod bushing in the molten salt reactor in the prior art, and the molten salt in the pump part of the primary circuit of the molten salt reactor. After expansion, it enters the overflow tank from the overflow pipe, which causes difficulties in radioactive management at the overflow pipe and overflow tank, is not conducive to containing the volume change of molten salt, and cannot effectively remove tritium. Chamber

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