A Simplified Risk Assessment Method for Nuclear Power Plant Based on Logical Equivalence Fault Tree

A technology of risk assessment and logical equivalence, applied in electrical testing/monitoring, program control, instrumentation, etc., can solve problems such as excessive computing resource requirements, long time consumption, and impossibility

Active Publication Date: 2018-10-12
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

Therefore, the operating efficiency of this evaluation will be limited by this and cannot be improved. Even when evaluating some large and complex systems, it may also consume too much time and require too many computing resources, thus losing the significance of the evaluation or even Not possible with current computer systems

Method used

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  • A Simplified Risk Assessment Method for Nuclear Power Plant Based on Logical Equivalence Fault Tree
  • A Simplified Risk Assessment Method for Nuclear Power Plant Based on Logical Equivalence Fault Tree
  • A Simplified Risk Assessment Method for Nuclear Power Plant Based on Logical Equivalence Fault Tree

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Embodiment Construction

[0041] The nuclear power plant risk assessment method based on logical equivalent fault tree simplification of the present invention comprises the following steps:

[0042] 1. Identify several basic events that affect the reliability of nuclear power plants, such as valve bursts, overheating, etc.

[0043] 2. Determine the logical relationship between the basic events determined in the previous step, use gates to represent the logical relationship, and build a fault tree with these basic events and gates, and the nodes of the fault tree are basic events and gates.

[0044] 3. Simplify the fault tree, such as figure 1 As shown, specifically include:

[0045] In step 100, each node of the fault tree T0 is traversed to obtain a normal expression form of the fault tree T0, that is, a fault tree T1 is obtained.

[0046] Step 200, obtain the characteristic information of the fault tree T1 and perform logical operations on the fault tree T1 according to the characteristic informati...

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Abstract

The invention discloses a fault tree simplified nuclear power plant risk assessment method based on logical equivalence. Fault tree simplification includes the steps of converting a fault tree into a standard fault tree, traversing the nodes of the fault tree to obtain an information set of each node so as to obtain the characteristic information of the fault tree, and finally, converting the fault tree into a fault tree which can be converted into a binary decision diagram more easily according to the characteristic information. The invention provides efficient fault tree simplification, and an inefficient and incalculable large-scale fault tree in the existing nuclear power plant risk assessment process is made efficient and calculable.

Description

technical field [0001] The invention relates to a reliability assessment method, in particular to a nuclear power plant risk assessment method based on logic equivalent fault tree simplification. Background technique [0002] The risk assessment of nuclear power plants plays an important guiding role in the safe operation of nuclear power plants, and the most effective method for reliability research of a system is the fault tree analysis method, especially for the analysis of large and complex systems such as nuclear power plants. After applying the fault tree analysis method to analyze the failure mode of the system, the risk of failure of the complex system can be determined according to the reliability of the components or subsystems. [0003] The current nuclear power plant risk assessment method mainly includes steps: determine the basic events that affect the reliability of nuclear power plants; determine the logical relationship between the basic events; use the gate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0248G05B2219/23158
Inventor 张经瑜高巍唐国锋李肇华张琴芳刘海滨
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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