Tube-plate double-process supercritical water cooled reactor

Abstract

The invention discloses a tube-plate double-process supercritical water cooled reactor. The reactor comprises a pressure container, a basket barrel, an inlet connecting tube and an outlet connecting tube, wherein an upper bearing subassembly, an upper reactor core plate and a lower tube plate are installed in the basket barrel, a lower reactor core plate is installed above the lower tube plate and parallel to the lower tube plate, a plurality of control rod guide subassemblies are installed on the upper bearing subassembly, a plurality of first-process fuel subassemblies and second-process fuel subassemblies are installed between the lower reactor core plate and the upper reactor core plate, the first-process fuel subassemblies are communicated with a bottom cavity of the pressure container through communication tubes, and an airtight cavity formed between the lower reactor core plate and the lower tube plate is communicated with the second-process fuel subassemblies. Supercritical outlet water is isolated from the inner wall of the reactor pressure container through an outlet thermal sleeve structure, so that the pressure container can be designed based on a conventional material; and double-process coolant circulation is realized in the supercritical water cooled reactor through designing reactor internals, and clear process channels and reasonable flow field distribution are provided.

Description

technical field [0001] The invention relates to a reactor structure in the nuclear industry, in particular to a tube-sheet type double-flow supercritical water-cooled reactor. Background technique [0002] A supercritical water-cooled reactor (SCWR) uses water as the coolant, and the outlet water state is above the critical point (374°C, 22.1MPa). Due to the high operating parameters and considering the limitations of existing materials and manufacturing levels, supercritical water-cooled reactors are mostly designed as multi-process structures. The European supercritical water-cooled reactor HPLWR is designed as a three-process structure. The reactor is mainly composed of reactor pressure vessel, basket assembly, lower mixing chamber, outlet steam chamber, outlet connection structure, control rod guide assembly, fuel assembly and other parts. [0003] However, the current three-flow structure of the above-mentioned supercritical water-cooled reactor is divided into three z...

AI Technical Summary

Problems solved by technology

In order to complete the three-process coolant flow channel, the reactor internals have designed a very complex structural form to meet the physical, thermal and hydraulic needs, making the design of the reactor internals very difficult, with a large number of parts and difficult to manufacture, install, and overhaul , the stability and reliability of the structure are not very good

[0004] Japan, the United States, Russia and other countries have also carried out related research on supercritical water-cooled reactors. Their preliminary designs all consider the use of a dual-flow structure, but in engineering design, they have failed to solve the problem of better balancing moderator coolant, effectively diverting flow, reducing Structural materials, and key technical issues such as improving the feasibility of structural design engineering manufacturing; and it has not entered the substantive structural design, and its theoretical structure does not have engineering adaptability and is not suitable for actual engineering

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