Module type pressurized water reactor

Abstract

The invention provides a module type pressurized water reactor. A reactor module is composed of a reactor body, a cooling agent system, and a safety system, the reactor body, the cooling agent system, and the safety system are all enclosed in a steel safety shell, and the whole reactor module is immersed in a reactor safety water pool, taking the pool water as the final hot trap for heat discharging of accidents. Emergency core cooling and emergency excess heat discharging are achieved by adopting a complete passive way, and the pressure inhibition and long-term heat discharging of the safety shell are achieved through repressing the water in the water pool and the reactor safety water pool; and during the processes of reloading and maintenance of reactor, through arranging a reloading water jacket between the safety shell reloading channel flange and the reactor container flange, direct-moving underwater fuel lifting operation is achieved between the safety shell and the spent fuel pool. A reactor factory can be provided with a plurality of reactor modules, all reactor modules co-use material loading equipment and other nuclear auxiliary systems, and the safety and economy of the reactor are improved through modularized combination arrangement. The module type pressurized water reactor is suitable for being applied to the fields of nuclear electricity generation, gas application, heat application, sea water desalination, and the like.

Description

technical field [0001] The invention belongs to a kind of nuclear reactor, be specifically related to a kind of multipurpose modular pressurized water reactor applicable to nuclear power generation, steam supply, heat supply and seawater desalination etc. [0002] Background technique [0003] Since nuclear energy was successfully applied to the field of electric power production, countries in the world have carried out a large number of explorations and applied research in non-electric fields such as nuclear energy city heating, industrial steam supply and seawater desalination, and proposed multiple reactor designs for this type of application . [0004] However, due to the contradiction between economy and safety, it has not been widely used and developed until now. [0005] In recent years, people have proposed a modular design concept, trying to improve the economics of small and medium-sized reactor applications while obtaining higher safety through modular design....

AI Technical Summary

Problems solved by technology

[0008] (1) Adopting the design scheme of integrated reactor with natural circulation of coolant, the height of the reactor body is large, the improvement of power scale and parameters is limited, and the operation regulation performance is poor. Refueling and maintenance are difficult, which is not conducive to improving economic efficiency

[0009] (2) The design of vertical cylindrical steel containment vessel is adopted, the height of the containment vessel is large, the internal free space is small, and the design pressure is high, which is not conducive to equipment layout and maintenance Replacement, poor engineering feasibility

[0010] (3) Adopting the support method of underwater detachable reactor modules, it is difficult to guarantee the engineering feasibility and safety and reliability

[0011] (4) Refueling and maintenance operations are carried out by hoisting the reactor module underwater as a whole to a dedicated refueling area. The requirements for transportation equipment are high, and there are big problems in the safety of refueling and engineering feasibility

[0013]2. The mPower modular reactor adopts a large reinforced concrete containment vessel design, all nuclear auxiliary systems are arranged in the containment vessel, spent fuel storage and refueling operations are in the It is carried out inside the containment, which cannot realize the sharing of auxiliary systems and facilities, and the size of the containment is large, which is not conducive to reducing the construction cost of the project

[0014]3. SMR small modular reactor adopts relatively large single-stack power, single-stack arrangement, built-in drive mechanism and built-in voltage Mechanisms, voltage regulators, main pumps and refueling process equipment need to adopt special special technology, the research and development cycle is long and the technology is difficult

[0015]The analysis of the above several modular reactor design technologies shows that the current design has not yet solved the contradiction between safety and economy and engineering reality can be applied sexual problems

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