A Coupling Method of Thermal-hydraulic Program and Containment Program

Abstract

The invention discloses a coupling method of a thermal-hydraulic program and a containment program. Based on a two-fluid model combined with a numerical solution method that participates in the coupling program, the spatial discrete equations of the solution variables are derived, the problem area is solved and divided, and a virtual The node simulates the coupling boundary, through the set reading and writing rules, the information exchange between the programs participating in the coupling is carried out, the coupling area is divided based on the scope of application of the participating coupling programs, and the thermal hydraulic program and the containment are completed using semi-implicit and explicit methods The coupling of the program, the coupling program can simultaneously simulate the thermal hydraulic response of the main circuit and the containment. The invention can simultaneously simulate the thermal-hydraulic response of the main circuit and the containment shell, and improves the speed and precision of reactor engineering design.

Description

technical field [0001] The invention belongs to the technical field of thermal hydraulics of nuclear reactors, in particular to a coupling method of a thermal hydraulics program and a containment program. Background technique [0002] The traditional nuclear power plant design method is carried out in blocks. For example, when conducting probabilistic safety risk assessment, the concern is the thermodynamic equilibrium in the containment, core melting and repositioning, debris bed formation and migration, chemical element release and transportation after an accident. etc. phenomenon. The characteristic size of these phenomena is generally in the range of several meters to tens of meters; for thermal parameter design or benchmark accident analysis, the concern is flow boiling, flash evaporation, liquid level collapse, critical flow, pressure wave, trans- The phenomenon of speed of sound, etc. The characteristic size of these phenomena is generally several centimeters to sev...

AI Technical Summary

Problems solved by technology

However, in the face of increasingly advanced design solutions, traditional design methods are difficult to meet the requirements of accuracy and complexity

The first is the increase in complexity brought about by the advancement of system design

The strong coupling effect between the systems makes the split iterative design particularly inefficient; another problem is that the existing program is difficult to meet the design accuracy requirements

In modern design, the details have been developed from the system to the component level, but the components in the traditional thermal hydraulic program are not identifiable individuals, and the amount of calculation brought by the CFD program that can give details is unbearable

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