Safety injection pump operation life prediction method and system

Abstract

The invention discloses a safety injection pump operation life prediction method and system. The method comprises the steps that the flow characteristic quantity, the power characteristic quantity andthe vibration characteristic quantity which correspond to the discharge pressure of a low-pressure safety injection pump during duration of a test are recorded in real time; then, characteristic quantity data are processed, a periodic function, a trend function and an irregular fluctuation function are extracted based on a function curve of the characteristic quantity and time, and a fault degreemodel (degeneration characteristic fault probability prediction model) is obtained according to the non-fault coverage of the characteristic quantity; then, the bayesian method considering only the time sequence is utilized, the fault probability of the low-pressure safety injection pump in the non-confidence interval at a certain moment is obtained, that is, real-time collected data of a durability test are substituted into the fault degree model, the fault probability of the low-pressure safety injection pump in the set confidence interval at any moment is calculated through the bayesian method of time sequence, and when the fault probability reaches the preset limit value, the durability test is stopped.

Description

technical field [0001] The invention relates to the field of nuclear equipment life prediction, in particular to a safety injection pump operation life prediction method and system. Background technique [0002] The safety injection pump is the abbreviation of the safety injection pump. The safety injection pump is one of the key equipments of the special safety system in the reactor. The flow of internal water in order to discharge waste heat. When the coolant pipeline breaks, the coolant in the reactor overflows, generating a large amount of steam and heat. The safety injection pump operates in such a high temperature and harsh environment, and the electrical and electronic equipment is more likely to be damaged by corrosion, and the mechanical equipment is even more prone to abnormalities in the rotating parts. [0003] The low-pressure safety injection pump in the safety injection pump is also one of the key equipment of the safety system in the reactor, and its life is...

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Problems solved by technology

However, this equipment is an electromechanical equipment with high reliability and long service life. It is difficult to accurately predict its service life through the existing general reliability evaluation methods, and the long-term life test method is too costly and the cycle is too long.

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