A Transient Monitoring Method for Nuclear Power Plant Supporting Fatigue Monitoring Function

A fatigue monitoring and nuclear power plant technology, applied in the field of transient monitoring, can solve problems such as jeopardizing safety, affecting the bearing capacity of the structure, and losing the bearing capacity of the structure, and achieves the effect of reducing storage capacity, efficient fatigue damage assessment, and reducing the amount of analysis and calculation.

Active Publication Date: 2022-07-22
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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Problems solved by technology

The considerable geometric size of the final crack ranges from seriously affecting the load-bearing capacity of the structure to completely losing the load-bearing capacity of the structure, leading to serious consequences that endanger safety

Method used

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  • A Transient Monitoring Method for Nuclear Power Plant Supporting Fatigue Monitoring Function

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Embodiment

[0025] according to figure 1 As shown, the transient monitoring method of the nuclear power plant fatigue monitoring system provided by the present invention includes the following steps:

[0026] S1. Establish a database, which saves the characteristic parameters of transient working conditions corresponding to the expected transient categories matching the monitoring object and its associated system, and the stress change process (or time history) caused by each transient category on the monitoring object and other data;

[0027] S2. Identify the transient start and transient end caused by the power plant operating conditions (or operating conditions) to which the monitoring object of the power plant (pipeline components with greater risk of being adversely affected by fatigue) endure, and obtain the basis for a reasonable fatigue analysis. Transient changes; and analyze and summarize the characteristic parameters of transient working conditions of the identified transient;...

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Abstract

The purpose of the present invention is to disclose a transient monitoring method for nuclear power plant supporting fatigue monitoring function, through the real-time measurement data of the original instrument of the nuclear power plant instrument control system to automatically identify the start and end of the transient that occurs on the monitoring object, and summarize the Identify the characteristic parameters of the transient; at the same time, according to the database: ① Through the comparison of the characteristic parameters, determine that the identified transient belongs to the monitoring object or the expected transient category of the process system to which it belongs, and record the transient category, the number of occurrences and the occurrence time , the stress change time history of the corresponding monitoring object is directly obtained from the database through the recorded transient category; ② If the identified transient does not belong to any existing category in the database, the characteristics of the identified transient The parameters establish a new transient category in the database, and the stress change time history of the monitoring object under the action of the transient category is obtained through analysis and calculation, and is stored in the new transient category of the database to support the subsequent completion of the fatigue damage assessment of the monitoring object.

Description

technical field [0001] The invention relates to a transient monitoring method, in particular to a transient monitoring method supporting a fatigue monitoring function in a nuclear power plant. This transient monitoring method can not only support the fatigue damage analysis and evaluation applied to the monitoring object, but also can be used for, but not limited to, the fatigue crack growth analysis and evaluation of the monitoring object. Background technique [0002] Fatigue is a structural damage that results from repeated cyclic stress / strain caused by changes in load and temperature. After repeated cyclic loading and accumulation of substantial localized microstructural damage, initial cracks develop in the most severely affected locations. Subsequent cyclic loading and / or thermal stress will propagate the crack. The appreciable geometry of the final crack ranges from severely affecting the load-bearing capacity of the structure to completely losing the load-bearing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/017G06F16/21G06Q10/00G06Q50/06
CPCG21C17/017G06Q10/20G06Q50/06G06F16/21Y02E30/30
Inventor 梁兵兵张旭施伟黄若涛殷海峰沈小要刘畅邓晶晶于泳洋朱睿嵘
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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