Fault-tree-based nuclear power plant valve body failure reliability monitor method

Abstract

The invention belongs to the field of nuclear power plant risk monitor, particularly relates to a fault-tree-based nuclear power plant valve body failure reliability monitor method which is based on a fault tree modeling technology and suitable for valve equipment body failure in nuclear power plant online risk monitor. The method comprises the steps that (1) state monitor information of a nuclear power plant valve is acquired online; (2) the initial state of the valve is identified online and an initial state transition diagram is established; (3) a modular fault tree reliability model for valve equipment body failure is established and updated online; and (4) the fault-tree-based valve equipment body failure reliability is calculated online. The framework and the steps of the reliability monitor method for nuclear power plant valve equipment body failure are given based on the fault tree method and the state monitor technology so that the defects of the conventional fault tree method in the aspects of valve equipment state modeling and online updating can be overcome.

Description

technical field [0001] The invention belongs to the field of nuclear power plant risk monitor (Risk Monitor), and in particular relates to a failure tree-based reliability of valve body failure of a nuclear power plant based on fault tree modeling technology, which is suitable for failure of valve equipment body failure in online risk monitoring of nuclear power plants monitoring method. Background technique [0002] Nuclear power plant risk monitoring technology is the specific application and development of probabilistic safety assessment (PSA) technology in the process of nuclear power plant operation. The use of risk monitoring technology in nuclear power plants can realize the known and controllable risks of nuclear power plants, so as to improve the economical efficiency of nuclear power plant operation under the premise of ensuring safety. When carrying out risk monitoring of nuclear power plants, it is necessary to consider the power plant configuration, that is, th...

AI Technical Summary

Problems solved by technology

The traditional method of controlling the configuration through room shape events usually only models the power plant configuration before and after the valve action in typical working conditions, and the influence of the valve action process is generally not modeled

This does not meet the needs of online risk monitoring

[0010] (2) It is not convenient to update the valve status

This cannot effectively use the collected information to achieve a more convenient and continuous update of the model in the context of the existing nuclear power plant informatization

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