Method for classifying corrosion risk of nuclear power plant equipment or structure

Abstract

The invention relates to a method for classifying corrosion risk of nuclear power plant equipment or structure, which comprises the following steps: (a) constant assignment is made to safety index ofnuclear power plant equipment or structure, and maximum constant assignment Rsafety is determined; (b) Constant assignment of the mandatory indices of nuclear power plant equipment or structures and determination of their maximum constant assignment Rtask; (c) Constant assignment of economic indicators of nuclear power plant equipment or structures and determination of their maximum constant assignment Reconomy; (d) calculate COC to determine consequence of corrosion failure of nuclear power plant equipment or structure; (e) Determine the probability index POC for corrosion failure of nuclearpower plant equipment or structures; (f) Calculate the corrosion risk ROC of nuclear power plant equipment or structures, and classify the risk according to its numerical value. These data are objective and operable, and can truly reflect the actual service status of power plant equipment or structures.

Description

technical field [0001] The invention belongs to the field of nuclear power plants, and in particular relates to a method for grading corrosion risks of nuclear power plant equipment or structures. Background technique [0002] At present, the classification method of nuclear power plant mechanical equipment and structures is mainly based on equipment safety and quality assurance requirements, such as RCCM and RCCP in France, ASME BPVC-III in the United States, and GB / T 17569-2013 in my country. These equipment classification methods start from the safety functions of equipment and structures to ensure the safety function of the unit under normal operating conditions and accident conditions, and divide the items according to their importance. It provides an important basis for quality and safety control. [0003] However, for the operation stage of nuclear power plants, equipment and structures with the same safety level face different operating environments. Under the inter...

AI Technical Summary

Problems solved by technology

[0003] However, for the operation stage of nuclear power plants, equipment and structures with the same safety level face different operating environments. Under the interaction between materials and the environment, the degradation degree of equipment or structures with the same safety level within a certain period of time is not the same. , it is obviously not appropriate to optimize maintenance management only according to the safety classification of equipment

Images