Non-destructive condition monitoring of nuclear power plants by use of vibration analysis

1991 ◽  
Vol 24 (2) ◽  
pp. 103
Keyword(s):  
Condition Monitoring ◽  
Vibration Analysis ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Non Destructive

Condition Monitoring of Rotating Equipment in Nuclear Power Plants

2017 ◽  
Author(s):  
Ronny Jacks
Keyword(s):  
Condition Monitoring ◽  
Vibration Analysis ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Monitoring Program ◽  
Oil Analysis ◽  
Motor Current Signature Analysis ◽  
Rotating Equipment ◽  
Monitoring Technologies

This presentation provides an overview of condition monitoring for rotating equipment in nuclear power plants. Specific condition monitoring technologies addressed include vibration analysis, lube oil analysis, thermography, and motor current signature analysis. Plant and equipment parameters, such as motor electrical and plant process parameters, useful for evaluating equipment condition, are also identified. The technologies are examined based on availability, cost effectiveness, and importance to a condition monitoring program. Although vibration analysis and oil analysis are the primary emphasis for performing condition monitoring, the inter-relationships between the technologies, techniques and other readily available plant data explored here demonstrate how a more complete and accurate diagnosis of the condition of a machine set can be determined. A discussion of each technology will include the various machine set faults which the technology will identify, as well as, how the overlapping technologies improve the effectiveness of a condition monitoring program. Paper published with permission.

The Geometry of Steam Generator Tube and Its Relevance to the Occurrence of Stress Corrosion Cracking in Operating Nuclear Power Plants

2010 ◽  
Author(s):  
Deok Hyun Lee ◽  
Do Haeng Hur ◽  
Myung Sik Choi ◽  
Kyung Mo Kim ◽  
Jung Ho Han ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Steam Generator ◽  
Stress Corrosion Cracking ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Corrosion Cracking ◽  
Location Type ◽  
Steam Generator Tubes ◽  
Non Destructive

Occurrences of a stress corrosion cracking in the steam generator tubes of operating nuclear power plants are closely related to the residual stress existing in the local region of a geometric change, that is, expansion transition, u-bend, ding, dent, bulge, etc. Therefore, information on the location, type and quantitative size of a geometric anomaly existing in a tube is a prerequisite to the activity of a non destructive inspection for an alert detection of an earlier crack and the prediction of a further crack evolution [1].

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