Multi-stage shunting flexible and efficient supercritical carbon dioxide lead-bismuth reactor system and method

Abstract

The invention discloses a multi-stage shunting flexible and efficient supercritical carbon dioxide lead bismuth reactor system and method. The system comprises a precooler, a compressor, a high-temperature regenerator, a high-temperature main heat exchanger, a high-temperature turbine, a high-temperature flow regulating valve, a medium-temperature regenerator, a medium-temperature main heat exchanger, a medium-temperature turbine, a medium-temperature flow regulating valve, a low-temperature regenerator, a low-temperature main heat exchanger, a low-temperature turbine, a low-temperature flow regulating valve, a generator and a reactor. According to the multi-stage shunting supercritical carbon dioxide cycle power generation system comprising a high-temperature circulation loop, a medium-temperature circulation loop and a low-temperature circulation loop, efficient gradient utilization of heat in different temperature intervals of a lead-bismuth loop is realized, and the problem that the matching degree of the heat absorption temperature of supercritical carbon dioxide power circulation and a heat exchange window of liquid metal lead bismuth is poor is solved. According to the system, through flow distribution adjustment of different temperature loops, efficient gradient utilization of heat under the variable working conditions of the supercritical carbon dioxide lead bismuth reactor system is ensured, and efficient and flexible power generation is achieved.

Description

technical field [0001] The invention relates to the technical field of high-efficiency nuclear power generation, in particular to a flexible and high-efficiency supercritical carbon dioxide lead-bismuth reactor system and method with multi-stage split flow. Background technique [0002] The fourth-generation nuclear power technology has the characteristics of preventing nuclear proliferation, better economy, high safety and less waste generation, and has attracted more and more attention. Higher new requirements have also been put forward. Lead-cooled fast reactor (LFR) is one of the fourth-generation reactor systems with great development potential. It has the advantages of compact reactor design, small volume, good thermal conductivity, high thermal efficiency, high power, natural circulation and low noise. It is very suitable for nuclear-powered submarines, aircraft carriers and other platforms that have special needs for small size, high power and high flexibility, and ...

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Problems solved by technology

[0007] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a flexible and high-efficiency supercritical carbon dioxide lead-bismuth stack system and method for multi-stage split flow. The present invention proposes a high-temperature circulation loop, a medium-temperature circulation loop and a low-temperature circulation loop The multi-stage split supercritical carbon dioxide cycle power generation system, through the high-temperature main heat exchanger, medium-temperature main heat exchanger and low-temperature main heat exchanger in the power generation system, realizes the efficient cascade utilization of heat in different temperature ranges of the lead-bismuth circuit, effectively solving the problem of The poor matching between the endothermic temperature of supercritical carbon dioxide power cycle and the heat transfer window of liquid metal lead and bismuth is solved

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