Mobile integrated dual-flow air-cooled reactor system and its working method

Abstract

The mobile integrated dual-flow gas-cooled reactor system and its working method adopt Brayton-Organic Rankine combined cycle. The whole system includes the gas-cooled reactor part, the main power generation part and the ORC waste heat power generation part; the core part of the gas-cooled reactor part is composed of internal The internal and external fuel tanks are composed of internal and external fuel tanks with different coolant pressures and opposite flow directions. The internal and external fuel tanks are arranged in the reflective layer with coolant flow channels. The axial ends of the reflective layer are respectively connected to the coaxially designed gas turbine, The compressor and the power generation unit constitute the main power generation part together with the regenerator; the ORC waste heat power generation part is composed of a two-stage ORC waste heat power generation circuit and is coupled with the main power generation part for waste heat discharge and recycling of the core; the system uses multiple sets of energy Using equipment, integrated dual-process and fuel tank design, it can contain fission products, meet equipment safety redundancy requirements and realize energy cascade utilization, and has the characteristics of compact size, high safety and high energy utilization.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor engineering, and in particular relates to a mobile integrated double-flow air-cooled reactor system cooled by gas working medium and a working method thereof. Background technique [0002] A gas-cooled reactor refers to a reactor that uses a gas coolant to cool reactor fuel blocks or fuel assemblies. Common cooling gases include pure helium, helium-xenon mixed gas, and supercritical carbon dioxide. Compared with liquid metal-cooled reactors (such as sodium-cooled fast reactors and lead-cooled fast reactors), the coolant used in gas-cooled reactors has good chemical stability and is not easily activated to produce toxic and harmful substances during operation. Compared with the currently popular pressurized water reactor, the thermal efficiency of the air-cooled reactor is high (about 40%) and the coolant will not change phase even under accident conditions, so the safety is also very high....

AI Technical Summary

Problems solved by technology

[0004] The one-way flow design of the coolant tends to lead to a higher average temperature near the outlet end of the long-term operating air-cooled reactor, while the average temperature at the inlet end is lower, which puts stricter high temperature resistance requirements on the materials at the reactor outlet end; the common compressor - The common shaft of the gas turbine runs through the reactor design, so that the shaft operates in a high-temperature and high-irradiation environment for a long time, which not only has strict requirements on the material of the shaft, but also absorbs neutrons from the material of the shaft and easily affects the neutron economy of the reactor; while using a single set of compressor-gas turbine The design mode of the main circuit of the unit is prone to the situation that when the compressor or the gas turbine has a shaft stuck accident, the core heat cannot be exported and the core melts.

In addition, the design of a single waste heat recovery power generation circuit is likely to cause waste heat energy waste and even cause reactor safety problems when a part of the circuit fails

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