Analytical method, equipment and storage medium for the internal environmental conditions of pressure relief valves for serious accidents

A serious accident and internal environment technology, applied in design optimization/simulation, instrumentation, geometric CAD, etc., can solve problems such as difficult to directly determine and analyze the availability of valves, achieve the effect of improving the level of availability analysis and ensuring the ability to deal with serious accidents

Active Publication Date: 2022-02-11
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the pressure relief valve is opened under a serious accident, the state of the medium passing through the valve is affected by various factors such as the melting and collapse process of the core, whether the safety system is in operation, the opening time of the valve, the number of opening valves, and the water level of the pressurizer. Due to the uncertainty of accidents, it is difficult to directly determine the limit conditions that can be used to analyze the availability of valves under severe accidents

Method used

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  • Analytical method, equipment and storage medium for the internal environmental conditions of pressure relief valves for serious accidents

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] The present invention will be described in detail below with reference to the accompanying drawings and the specific embodiments, and the example is a description of the Hualong No. 1 Power Plant.

[0047] like figure 1 As shown, the internal environmental conditions analysis method of the decompression valve after a nuclear power plant provided by the present invention, including the following steps:

[0048] S1: According to the design of the power plant system, use the integrated accident simulation tool of the reactor coolant system and the safety shell, establish a serious accident calculation and analysis model of reactor, simulate the accident process after serious accidents;

[0049] Among them, the reactor severe accident calculation analysis model uses MaAP procedures as analysis tools, simulating the reactive stack core, a circuit system, two-circuit system, fast pressure relief system, safety shell space, and related special security facilities; simulation of se...

Embodiment 2

[0065] like figure 1 As shown, the difference from the first embodiment is that the present embodiment provides an apparatus, the device comprising:

[0066] One or more processors;

[0067] Memory, used to store one or more programs,

[0068] When the one or more procedures are performed by the one or more processors, the internal environmental conditions of the unloading valve after a nuclear power plant described in Example 1 is performed by the one or more processes. method.

[0069] Among them, the execution flow of the internal environmental conditions analysis method of the pressure-up valve after a nuclear power plant has been described in the first embodiment, ie, according to the method of the method in Embodiment 1, can be implemented.

[0070] The present invention is aimed at the lack of the availability analysis of the special equipment for serious accident dedicated equipment in the nuclear power plant, providing a device, and has been screened by high-voltage serio...

Embodiment 3

[0072] like figure 1 As shown, the difference from the first embodiment is that the present embodiment provides a computer readable storage medium stored in a computer program that implements a nuclear power plant according to Embodiment 1 when executed by the processor. Analysis of internal environmental conditions for pressure relief valve after severe accidents.

[0073] Among them, the execution flow of the internal environmental conditions analysis method of the pressure-up valve after a nuclear power plant has been described in the first embodiment, ie, according to the method of the method in Embodiment 1, can be implemented.

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Abstract

The invention discloses a method, equipment and storage medium for analyzing the internal environmental conditions of a severe accident pressure relief valve. The method includes: establishing a calculation and analysis model for a serious accident of a reactor; selecting an initiating event suitable for the analysis of the internal environmental conditions of a pressure relief valve; determining The opening time window of the pressure relief valve and the time that needs to be kept open; use the established calculation and analysis model to conduct a sensitivity analysis of the valve opening time and opening quantity for the selected initiating event, and obtain the analysis results; compare and analyze the analysis results, Obtain the internal environmental conditions of the valve that can be used in the availability analysis of special pressure relief valve equipment. The present invention analyzes the internal environmental conditions of the valve comprehensively affected by various factors through the screening and sensitivity analysis of high-pressure serious accident sequences that require pressure relief, and can cover the uncertainty of some serious accidents to obtain the analysis method of the present invention ;Meet the conditions and requirements for the availability analysis of special pressure relief valve equipment for severe accidents.

Description

Technical field [0001] The present invention relates to the field of design technology of nuclear power plant reactor safety system, and specific to the internal environmental conditions, equipment and storage media involving serious accidental pressure valve. Background technique [0002] Serious accident pressure is important serious accident management measures to prevent high-pressure meltblown phenomena and protect safety shell integrity. The three-generation nuclear power plants have set a forced pressure relief system specifically for serious accidents, which reduces a circuit pressure to avoid high-pressure meltblows before the reactor pressure vessel is damaged. [0003] To ensure that the pressure relief valve can perform its function in a serious accident, it is necessary to analyze the availability of its operating conditions. The environmental conditions used in the availability analysis require that the 3.3 section design reference requirement: "The design reference...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F119/02
CPCG06F30/17G06F30/20G06F2119/02
Inventor 王小吉武铃珺吴清刘昌文冷贵君向清安邹志强刘丽莉邓坚张明彭欢欢
Owner NUCLEAR POWER INSTITUTE OF CHINA
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