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

A classification method and structure technology, applied in the field of nuclear power plants, can solve problems such as inappropriateness, and achieve the effect of easy access and good operability

Active Publication Date: 2019-02-22
SUZHOU NUCLEAR POWER RES INST +2
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  • Claims
  • Application Information

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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

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

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Embodiment Construction

[0033] The preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing:

[0034] The method for grading the corrosion risk of nuclear power plant equipment or structures of the present invention comprises the following steps:

[0035] (a) Assign constant values ​​to the safety indicators of nuclear power plant equipment or structures, and determine the largest constant value R safety ; Safety indicators include at least safety level, earthquake resistance level, operating temperature level and operating pressure level and other sub-items (as shown in Table 1), then R safety = max(S1, S2, S3, S4, SX);

[0036] Table 1 Safety index assignment table for nuclear power plant equipment or structures

[0037]

[0038] (b) Assign constant values ​​to the task indicators of nuclear power plant equipment or structures, and determine the largest constant value R task ; The task index includes at least I0 level (referring ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q10/06393G06Q50/06
Inventor 王水勇薛飞遆文新陈汉明郭文海
Owner SUZHOU NUCLEAR POWER RES INST
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