Nuclear power plant steam generator heat transfer tube state monitoring and crevasse degree evaluation method

The embodiment of the invention discloses a nuclear power plant steam generator heat transfer tube state monitoring and crevasse degree evaluation method, and the scheme can comprise the steps: collecting the related characteristic parameters of a to-be-monitored nuclear power plant when the to-be-monitored nuclear power plant does not have a fault under the full-power operation condition of the to-be-monitored nuclear power plant, then inserting a plurality of crevasses with different sizes into the heat transfer tube of the steam generator of the nuclear power station to be monitored, and collecting fault state characteristic parameters corresponding to the related characteristic parameters; a noise reduction automatic encoder DAE is adopted to carry out dimension reduction processing on the relevant characteristic parameters when the fault does not occur and the fault state characteristic parameters; designing a state monitoring module based on the One-Class SVM (Support Vector Machine); expansion of small