Method for analyzing large break accident of nuclear power plant

A technology of accident analysis and big breach, applied in nuclear power generation, nuclear engineering, nuclear reactor monitoring, etc., can solve the problem that the DRM method is difficult to meet the balance requirements of nuclear power plant design economy and safety, so as to reduce the conservative margin and ensure margin, effect of increasing conservatism

Active Publication Date: 2018-01-30
LINGDONG NUCLEAR POWER +3
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Problems solved by technology

The conservatism of the deterministic realistic method (DRM) is between the conservative analysis method and the best estimate analysis method. However, with the improvement of design requirements, the DRM method is gradually difficult to meet the balance re

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  • Method for analyzing large break accident of nuclear power plant
  • Method for analyzing large break accident of nuclear power plant
  • Method for analyzing large break accident of nuclear power plant

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Embodiment Construction

[0036] The following descriptions of various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented.

[0037] Please refer to figure 1 As shown, the embodiment of the present invention provides a method for analyzing a large breach accident in a nuclear power plant, including:

[0038] Step S1, establishing a power plant model to capture the main physical phenomena and transient state of a realistic large breach loss of fluid accident;

[0039] Step S2, analyzing and determining the key parameters affecting the main physical phenomena and transient state;

[0040] Step S3, classifying the key parameters, the key parameters are at least divided into conservative assumption parameters, sampling parameters and penalty parameters;

[0041] Step S4, setting the worst condition assumption for the conservative assumption parameter, and performing uncertainty quantitative analysis on the sampling parameter,...

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Abstract

The invention provides a method for analyzing large break accident of a nuclear power plant. The method comprises the following steps: S1, building a power plant model for catching major physical phenomenon and transient state of real large break loss of coolant accident; S2, analyzing and determining key parameters of the major physical phenomenon and the transient state; S3, classifying the keyparameters, wherein the key parameters are classified into at least conservative assumption parameters, sampling parameters and penalty parameters; S4, setting the most severe condition assumption forthe conservative assumption parameters, and quantitatively analyzing uncertainty of the sampling parameters and the penalty parameters so as to obtain the target parameter value at the set level; S5,selecting a penalty model from the penalty parameters, and performing penalty, so as to realize that the target parameter value obtained through the penalty parameters obtained by penalty treatment includes the target parameter value at the set level. With the adoption of the method in the embodiment, the sampling calculation of a method combining the best estimation and the uncertainty analyzingis reduced, and the conservation margin of deterministic realistic method is decreased.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant accident analysis, in particular to a method for analyzing a large breach accident in a nuclear power plant. Background technique [0002] Reactor coolant loss accident, abbreviated as loss of water accident (LOCA), refers to an accident in which the pressure boundary of the primary circuit is breached or ruptured, or the valve is opened by mistake, resulting in a decrease in the coolant volume of the primary circuit. Among them, the Large Break Loss of Water Accident (LBLOCA), because the accident phenomenon is very complex and the consequences are serious, its margin (the acceptance criterion of the general limit of the accident is the cladding peak temperature, PCT) directly limits the economic efficiency of the nuclear power plant, and is the most One of the important design basis accidents. [0003] In the initial stage of nuclear power development, conservative analysis methods ...

Claims

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Application Information

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IPC IPC(8): G21C17/00
CPCY02E30/30
Inventor 王婷林支康卢向晖梁任宋建阳杨江方思远黄熙吕逸君梁活沈永刚厉井钢
Owner LINGDONG NUCLEAR POWER
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