Pool-type sodium-cooled fast reactor main coolant system heat transfer and flow rapid simulation method

Abstract

The invention provides a pool-type sodium-cooled fast reactor main coolant system heat transfer and flow rapid simulation method, which comprises the following steps: carrying out decoupling modeling on a flow and heat transfer process of a pool-type sodium-cooled fast reactor main coolant system to realize parallelization on a simulation modeling level; removing a control body in the modeling of the flow process of the pool-type sodium-cooled fast reactor main coolant system; carrying out nonlinear equation set analytic processing on a first-order nonlinear differential equation set for describing the flow process of the pool-type sodium-cooled fast reactor main coolant system; separately solving the heat transfer process and the flow process by applying different computing resources in parallel; updating the physical parameters of each control body through the calculated pressure and enthalpy value by utilizing a physical property calculation formula; and determining whether the simulation calculation within the required time duration is completed or not. According to the method, the heat transfer and flow simulation calculation efficiency of the pool-type sodium-cooled fast reactor main coolant system is improved through decoupling modeling, control body removal in modeling, nonlinear equation set analytic processing in solving and the like.

Description

technical field [0001] The invention relates to the technical field of simulation technology of a main coolant system of a pool-type sodium-cooled fast reactor, in particular to a rapid simulation method for heat transfer and flow of the main coolant system of a pool-type sodium-cooled fast reactor. Background technique [0002] The China Experimental Fast Reactor is the first sodium-cooled fast reactor built in China, and the China Demonstration Fast Reactor is the first sodium-cooled demonstration fast reactor built in China. The Nuclear Power Simulation Research Center (the unit) of Harbin Engineering University has developed real-time simulation systems for the main coolant systems of China Experimental Fast Reactor and China Demonstration Fast Reactor respectively. The main cooling system of the two pool-type sodium-cooled fast reactors has a complex structure, including cold and hot sodium pools, cores, intermediate heat exchangers, independent heat exchangers, main pu...

AI Technical Summary

Problems solved by technology

The main cooling system of the two pool-type sodium-cooled fast reactors has a complex structure, including cold and hot sodium pools, cores, intermediate heat exchangers, independent heat exchangers, main pumps, pressure tubes, large and small grid headers, graphite shielded tube bundles, Equipment and structures such as biological shielding support cylinders, horizontal / vertical / annular partitions are significantly different from those of pressurized water reactors widely used in the world in terms of structure and operating characteristics

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