Spiral cross fuel element small villiaumite cooling high-temperature reactor core

Abstract

The invention discloses a spiral cross fuel element small villiaumite cooling high-temperature reactor core which comprises a reactor core shroud and an upper chamber, an upper reflecting layer, a radial reflecting layer, a coolant bypass flow channel, a fuel assembly, a control rod assembly, a lower reflecting layer and a lower chamber which are positioned in the reactor core shroud; the fuel assembly comprises a fuel element, a coolant channel and a graphite layer; the fuel element comprises a fuel area and a cladding; the control rod assembly comprises a control rod, a coolant channel and the graphite layer; the control rod comprises a control body, a gap and a guide pipe. The spiral cross fuel element is adopted, the heat transfer area is increased, reactor core coolant roiling is enhanced, and the heat exchange effect is improved, so that the reactor core power density is improved. Meanwhile, the use of a positioning grillwork is avoided by virtue of mutual support among the spiral cross-shaped fuel elements so that the reactor core structure is simplified. The reactor core outputs heat through the fused salt heat exchanger and stores the heat in the energy storage pool, the heat can be used for power generation and output of high-temperature process heat, and multipurpose utilization of the heat is achieved.

Description

technical field [0001] The invention relates to the technical field of reactor design, in particular to a small-sized fluorine salt cooling high temperature reactor core of a spiral cross fuel element. Background technique [0002] Fluoride-salt-cooled high-temperature reactor is a fourth-generation reactor proposed by combining the advantages of molten salt reactor, high-temperature gas-cooled reactor and sodium-cooled fast reactor. It uses fluoride salt as coolant and coated particles as fuel. Safety, economics, sustainability and non-proliferation. [0003] Spiral cross fuel is a new type of high-performance fuel, which improves the thermal-hydraulic performance of fuel elements by improving the geometry of traditional nuclear fuel, which can greatly increase the power density of the core, and has broad application prospects in reactor design. [0004] In the conceptual design schemes of fluorine-salt-cooled high-temperature reactors currently proposed at home and abroad...

AI Technical Summary

Problems solved by technology

[0004] In the conceptual design schemes of fluorine-salt-cooled high-temperature reactors currently proposed at home and abroad, the fuel elements used in the core include cylinders, rings, plates, and spheres. The cylinders and rings are not easy to install and position. It is easy to generate flow-induced vibration, and the plate-shaped fuel element has good mechanical properties, but it has a high fuel peak temperature and a short core life, and the online refueling feature of the spherical fuel element makes the fuel cycle scheme more complicated , more research is needed

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