Fire analysis method and system for horizontal multi-layer cable tray in nuclear power plant

Abstract

The invention relates to a fire analysis method and system for horizontal multi-layer cable bridges of a nuclear power plant. The method comprises following steps: acquiring initial fire source feature information of fire of the horizontal multi-layer cable bridges of the nuclear power plant; acquiring real-time heat release rate of each layer of cable bridge in the fire process according to the initial fire source feature information, geometrical structure parameters of the horizontal multi-layer cable bridges, the longitudinal spreading speed of a cable flame and feature parameters of cable materials; acquiring fire risk feature parameters in confined space according to the initial fire source feature information and the real-time heat release rate of each layer of cable bridge; comparing the fire risk feature parameters with quantitative indexes and judging the fire risk of the horizontal multi-layer cable bridges of the nuclear power plant. According to the method and the system, the conservative principle of the nuclear power plant is met, the differences between single cable bridges in the horizontal multi-layer cable bridges are fully considered, the analysis accuracy is higher, the fire risk of the horizontal multi-layer cable bridges of the nuclear power plant can be analyzed more reasonably, and great support is provided for fire protection design of the cable bridges.

Description

technical field [0001] The invention relates to the field of nuclear power plant design, in particular to a fire analysis method and system for a horizontal multi-layer cable bridge in a nuclear power plant. Background technique [0002] With the development of China's urbanization and modernization, it is estimated that the electricity consumption of the whole society will double in 2030. Therefore, in order to achieve the carbon emission target before 2030, we must vigorously develop low-carbon clean energy including nuclear power. By 2020, China's nuclear power installed capacity will reach 58 million kilowatts, and the capacity under construction will reach more than 30 million kilowatts. However, safety and economy are the two main factors restricting the development of nuclear power. [0003] According to the statistics of the Electric Power Research Institute in the United States, the frequency of nuclear power plant fires from 1991 to 2008 was 0.14 times per pile p...

AI Technical Summary

Problems solved by technology

At present, the common treatment method is to regard the horizontal multi-layer cable tray as an overall fire source, ignore the difference in combustion between the individual cable trays inside the horizontal multi-layer cable tray, and overestimate the amount of oxygen consumed by the cable burning in the initial stage of the fire , leading to incorrect calculation results

Therefore, the fire risk analysis of horizontal multi-layer cable trays based on such methods is also unreasonable

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