Small prismatic annular air-cooled micro-reactor core system with densely arranged coolant channels

Abstract

The invention discloses a small prismatic annular air-cooled micro-reactor core system with densely arranged coolant channels. The small prismatic annular air-cooled micro-reactor core system comprises a fuel assembly, a control rod assembly and a reflecting layer; the fuel assembly comprises a fuel rod channel and a coolant channel; a coolant channel is arranged around each fuel rod channel to reduce the maximum temperature of the fuel; the reflecting layer comprises an upper reflecting layer, a lower reflecting layer, a side reflecting layer and an inner reflecting layer; the inner reflecting layer is arranged in the center of the reactor core to prevent the temperature of the center of the reactor core from being too high; the fuel assembly is arranged around the inner reflecting layer; the control rod assembly includes an emergency cold shut-down rod surrounded by the fuel assembly and a regulation control rod disposed at the side reflecting layer. The system has the beneficial effects that the cooling agent channels are uniformly and densely arranged so that the cooling capacity of the fuel assembly is enhanced; and the arranged inner reflecting layer is beneficial to reducing the highest temperature of the reactor core and improving the temperature rise allowance of the reactor core so that the safety of the reactor core is improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor engineering, in particular to a small prismatic annular air-cooled micro-reactor core system with densely arranged coolant passages. Background technique [0002] The rapid economic development has increased the demand for energy, but traditional coal and other fossil fuels will bring serious environmental problems, which prompts my country to continue to explore and develop clean energy, continuously optimize the existing energy structure, and reduce the cost of fossil fuels. proportion of energy. Among various types of new energy, nuclear energy has the advantages of cleanness, high energy density, almost no greenhouse gas emissions, and low fuel transportation pressure. In recent years since entering the 21st century, nuclear energy has been continuously developed and has become an important option for my country to improve its energy structure, and it has also been further strengthened...

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Problems solved by technology

But on the other hand, because the core outlet temperature generally reaches 750°C or above, the temperature of the fuel, graphite and other structures in the core is often very high, which not only affects the realization of the intrinsic safety of the core, but also affects the control rod cladding, etc. Realization of heap internal component functions

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