Experience-feedback-based nuclear power equipment preventive replacement cycle optimizing method

An optimization method and preventive technology, applied in the direction of instruments, data processing applications, calculations, etc., can solve the problems of low reliability of reliability indicators, limited application, and few failure data, etc., to achieve reasonable and reliable methods and improve safety. applied effects

Inactive Publication Date: 2011-07-06
SUZHOU NUCLEAR POWER RES INST +1
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Problems solved by technology

However, due to the short operating time of domestic nuclear power plants, there are few failure data, or even no failure data, the reliability of the calculated relia

Method used

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  • Experience-feedback-based nuclear power equipment preventive replacement cycle optimizing method
  • Experience-feedback-based nuclear power equipment preventive replacement cycle optimizing method
  • Experience-feedback-based nuclear power equipment preventive replacement cycle optimizing method

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[0060] Two kinds of instrumentation switches were selected as the target equipment, and the opinions of 10 experts were sought, including electrical engineers, nuclear equipment appraisal engineers, equipment manufacturers, operation and maintenance personnel, etc. The results are shown in Table 2.

[0061]

[0062] According to the calculation results in Table 2, the prior distribution and mathematical expectation can be calculated according to formula (6) and formula (8). p b , see Table 3.

[0063] According to the calculation results in Table 3, 10 years can be selected as the initial replacement period for switch 1, and 8 years can be selected as the initial replacement period for switch 2.

[0064] The following corrections are made based on actual operating experience. A total of 20 switches 1 were in use at the site. When the operation reached the 13th overhaul cycle, there was a failure once, and there was no failure record after that; there were 4 switches 2 at ...

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Abstract

The invention provides an experience-feedback-based nuclear power equipment preventive replacement cycle optimizing method, which comprises the following steps of: obtaining an initial value of an equipment preventive replacement event by utilizing expert opinions according to equipment grading, and calculating the prior information of distribution of probability of no failure of equipment in a preventive replacement cycle; and performing correction in combination with practical field running experience feedback by adopting a Bayesian theory to obtain corresponding posterior information, and comparing the probabilities of no failure before and after the preventive replacement cycle is corrected, and performing optimization to finally obtain the optimal replacement cycle of the nuclear power equipment. The method is rational and reliable, and the application security of the nuclear power equipment can be effectively improved.

Description

[0001] technical field [0002] The invention relates to a method for optimizing the preventive maintenance cycle of nuclear power equipment based on experience feedback. Background technique [0003] As the operating time of nuclear power plants increases, nuclear power equipment will inevitably age and fail, which will bring safety hazards and even economic losses to the power plant. In order to ensure the safety, economy, reliability and stability of nuclear power plants in operation, the maintenance level of nuclear power equipment has become a key guarantee. At present, maintenance strategies have gradually become a hot issue of concern to scholars at home and abroad. [0004] Due to the lack of theoretical guidance, there are a large number of blind maintenance and over-maintenance problems in domestic nuclear power plants. Therefore, it is necessary to analyze theoretically, put forward a scientific and reasonable preventive maintenance strategy for important equip...

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Application Information

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IPC IPC(8): G06Q10/00G06Q50/00G06Q50/06
Inventor 石颉施海宁姚建林
Owner SUZHOU NUCLEAR POWER RES INST
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