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Fault tree based initial event frequency evaluation method and device and computer-readable storage medium

A fault tree and basic event technology, applied in the field of nuclear safety, can solve problems such as difficulty in determining the frequency of initiating events, and achieve the effects of easy engineering implementation, good compatibility, and easy acceptance

Active Publication Date: 2020-03-31
YANGJIANG NUCLEAR POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, for new reactor types or research reactors, there is no relevant operating experience and data for reference when doing the Probabilistic Safety Assessment (PSA), leading to Difficulty determining the frequency of events

Method used

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  • Fault tree based initial event frequency evaluation method and device and computer-readable storage medium

Examples

Experimental program
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Embodiment 1

[0034] Such as figure 1 As shown, the flow chart of the method for evaluating the frequency of initiating events based on the fault tree provided by the present invention. The evaluation method includes the following steps:

[0035] Step S1, determine the initiating event to be evaluated and all fault causes leading to the initiating event, and jump to step S2 with the initiating event as the current layer event;

[0036] Step S2, judging whether the fault cause of the current layer event is a frequency value or a probability value;

[0037] Step S3, if the failure cause of the event at the current layer is a probability value, then all basic events at the lower layer are probability values, select Mission Time-operating failure class or Probability-requirement failure class as the reliability model, and jump to step S8; if The fault cause of the current layer event is the frequency value, judge whether the lower layer events are logical OR connection (that is, "OR" parallel...

Embodiment 2

[0062] This embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the evaluation method provided in Embodiment 1 is realized.

[0063] In particular, any combination of one or more computer readable medium(s) may be utilized. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more leads, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), ...

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Abstract

The invention discloses fault tree based initial event frequency evaluation method and device and a computer-readable storage medium. The evaluation method shows a framework and steps for initial event frequency evaluation, and can overcome the difficulty that there is no operation experience and data for support during PSA analysis with a new reactor type or a research reactor. In addition, the method solves a problem that how to make a reasonable evaluation for frequency of occurrence of the initial event by using logistic operation of the fault tree and reasonably defining the reliability models of all basic events under the situation that there is no basic event with known frequency of occurrence. Meanwhile, the evaluation method has good compatibility with common widely-applied commercial software (i.e., Risk Spectrum), so that existing modeling software based on fault tree can be fully utilized. The method is fairly acceptable by nuclear power engineering staff, and brings convenience to engineering implementation.

Description

technical field [0001] The invention relates to the technical field of nuclear safety, in particular to a fault tree-based initiating event frequency evaluation method, equipment and a computer-readable storage medium. Background technique [0002] The frequency of initiating events is one of the basic parameters required for the quantification of the Probabilistic Safety Assessment (PSA) model. Usually, the frequency of initiating events can be obtained through the following methods: operating experience; general data; data after Bayesian processing of operating experience and general data; data of the same type of units; expert judgment. The frequency of initiating events is the basis of risk quantification in nuclear power plants, which can usually be determined by referring to general data or based on power plant operating experience and expert judgment. [0003] However, for new reactor types or research reactors, there is no relevant operating experience and data for ...

Claims

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Application Information

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IPC IPC(8): G21D3/00G21D3/06
CPCG21D3/06G21D3/001Y02E30/00
Inventor 李丹刘萍萍何升亮粟姚
Owner YANGJIANG NUCLEAR POWER
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