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Nuclear power plant reactor protection system reliability analysis method

A technology for nuclear power plant reactors and protection systems, applied in the field of system reliability analysis and design

Active Publication Date: 2015-08-19
NORTHEASTERN UNIV
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Problems solved by technology

Applying the traditional reliability estimation method theoretically requires every million reliability tests to obtain one failure data sample, which will inevitably lead to huge consumption of manpower, material resources and financial resources.

Method used

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  • Nuclear power plant reactor protection system reliability analysis method
  • Nuclear power plant reactor protection system reliability analysis method
  • Nuclear power plant reactor protection system reliability analysis method

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Embodiment Construction

[0047] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] Taking the reliability analysis of a nuclear power plant reactor protection system as an example, the implementation process of the method of the present invention is described in detail. The reliability analysis method of the nuclear power plant reactor protection system is as follows: figure 1 shown, including the following steps:

[0049] Step 1. Determine its fault tree model according to the structure and functional relationship of the reactor protection system of the nuclear power plant;

[0050] Step 1.1, determine the top event of the fault tree and the secondary events that cause the top event to occur;

[0051] The top event of the fault tree is the nuclear power plant emergency shutdown failure (RCPS000);

[0052] The secondary events leading to the top event include voltage regulator low pressure signal fail...

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Abstract

The invention provides a nuclear power plant reactor protection system reliability analysis method. The method includes: determining a fault-tree model according to the structure and function of a nuclear power plant reactor protection system; calculating a minimal cut set causing top events; acquiring historical fault data of the nuclear power plant reactor protection system; calculating lifespan statistics of the nuclear power plant reactor protection system; establishing an information entropy model of lifespan distribution probability density function of the nuclear power plant reactor protection system and calculating the optimal lifespan distribution probability density function, failure probability, reliability and failure rate of the nuclear power plant reactor protection system. Integral lifespan distribution and dynamic failure rate of the system are predicated according to a small amount of reliability test data, the predication conforms to large-sample monte carlo simulation results, and the technical method is provided for predication of the system lifespan and evaluation of the dynamic failure rate of the nuclear power plant reactor protection system under the small failure probability condition.

Description

technical field [0001] The invention belongs to the technical field of system reliability analysis and design, and in particular relates to a reliability analysis method for a nuclear power plant reactor protection system. Background technique [0002] System reliability refers to the ability of the system to complete the specified functions under the specified conditions and within the specified time. From the perspective of the entire life cycle, whether the system can complete the expected function has multiple indicators: for repairable systems and equipment, the indicators include reliability, mean time between failure (Mean Time Between Failure, MTBF), mean repair Time (Mean Time To Repair, MTTR), availability, effective life, etc.; for non-repairable systems or products, including reliability, reliable life, failure rate, mean life (Mean Time To Failure, MTTF) and other technical indicators. [0003] After the product design is completed, it needs to go through stric...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张旭方仝允张义民
Owner NORTHEASTERN UNIV
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