Mobile integrated two-flow gas cooled reactor system and working method thereof

Abstract

The invention discloses a mobile integrated two-process gas cooled reactor system and a working method thereof. The system adopts a Brayton-organic Rankine combined cycle, and the whole system comprises a gas cooled reactor part, a main power generation part and an ORC waste heat power generation part; a core part of the gas cooled reactor part is composed of an inner fuel tank and an outer fuel tank which are different in internal coolant working medium pressure and opposite in flowing direction; the inner fuel tank and the outer fuel tank are arranged in a reflecting layer with coolant working medium flowing pore passages; the two axial ends of the reflecting layer are tightly connected with a gas turbine, a gas compressor and a power generation unit which are coaxially designed respectively, and the main power generation part is formed together with a heat regenerator; and the ORC waste heat power generation part consists of two stages of ORC waste heat power generation loops and is coupled with the main power generation part for discharging and recycling waste heat of the reactor core. According to the system, multiple sets of energy utilization equipment, an integrated double-process and fuel tank design are adopted, fission products can be contained, the equipment safety redundancy requirement is met, energy gradient utilization is achieved, and the system has the advantages of being compact, small in size, high in safety and high in energy utilization rate.

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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