Large break loss-of-water accident analysis method and system

Abstract

The invention relates to the technical field of reactor thermal hydraulic design and safety analysis, and particularly discloses a large-break water loss accident analysis method and system. The method includes following steps: selecting index parameters related to the nuclear power plant large crevasse water loss accident; establishing a steady-state calculation model, performing steady-state calculation on the related parameters of the large break water loss accident, and performing parameter value verification after the steady-state calculation; establishing a transient calculation model and carrying out transient calculation on related parameters of the large crevasse water loss accident, performing comparison with actual crevasse and nuclear power plant external power conditions according to a calculation result, and when deviation occurs, reconstructing the transient calculation model and performing transient calculation; and performing safe water injection deduction to obtain a liquid level parameter value, updating the transient model, performing recalculation on the basis of a steady-state calculation result, and performing parameter display and analysis after calculation is completed. According to the method and the system, the problems of multiple working conditions, complicated process and high human error rate of pressurized water reactor large break water loss accident analysis are solved.

Description

technical field [0001] The invention belongs to the technical field of thermal-hydraulic design and safety analysis of reactors, and in particular relates to an analysis method and system for a large breach loss-of-water accident. Background technique [0002] Large breach accidents determine one of the most important design basis accidents for the operating power of nuclear power plants, and its analysis and evaluation models can be selected from conservative evaluation models, combined evaluation models, best estimation models, and risk-guided evaluation models. These models mainly include computer programs, system component availability assumptions, initial conditions and boundary conditions. When the computer program adopts the system program of the Appendix K model that meets the requirements of the regulations, the availability of system components adopts conservative assumptions, and the initial conditions and boundary conditions adopt actual data + uncertainties, a c...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for analyzing the loss of water accidents of large grooves, so as to solve the problems of low analysis efficiency and human errors in the analysis process of large groove loss of water accidents

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