Effect of the layout of small-and large-series WWER-1000 reactors of nuclear power plants on the stress-strain state of the header-steam generator connector weldment

2007 ◽  
Vol 39 (5) ◽  
pp. 539-544 ◽  
Author(s):  
G. V. Stepanov ◽  
V. V. Kharchenko ◽  
A. I. Babutskii ◽  
S. V. Kobel’skii ◽  
I. V. Orynyak ◽  
...  
Keyword(s):  
Steam Generator ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Strain State ◽  
Large Series ◽  
Stress Strain ◽  
Stress Strain State

MATHEMATICAL MODELING OF THE PROCESS OF POSSIBLE DAMAGE TO NPP PIPELINES DUE TO THEIER LOCAL EROSION AND CORROSION SINKING

2021 ◽  
pp. 18-24
Author(s):  
A. E. Gusarov ◽  
L. V. Sergeeva
Keyword(s):  
Computer Modeling ◽  
Crack Growth ◽  
Nuclear Power ◽  
Power Plants ◽  
Strain State ◽  
Complex Shape ◽  
Operating Conditions ◽  
Stress Strain ◽  
Strength Assessment ◽  
Stress Strain State

The article is devoted to computer modeling of the process of possible damage to the pipelines of nuclear power plants that received local thinning of the walls.The geometric features of pipelines are essential not only for assessing the intensity of erosion and corrosion of a metal, but also for the final strength assessment, in particular, when calculating local thinning of the walls of pipelines. The accuracy of forecasts of the life of pipeline structures directly depends on the ability to evaluate the strength of pipeline elements that have received local thinning, especially if these elements themselves have a complex shape. Such elements include elbows, nozzles, adapters (transitions), shells. All of these elements are thin-walled structures of complex shape. Computer modeling of the process of crack formation and growth requires solving several problems. A review and critical analysis of the available experimental information on the growth rates of cracks in specific structural materials and in the environment that is characteristic of given operating conditions is required. An assessment of the crack growth rate is impossible without determining the stresses and strains in the shell structure of complex spatial geometry. The development of routine criteria for crack growth and their attachment to a stress-strain state calculation program is the next task. To solve these problems, a complex of three-dimensional finite element methodologies and programs based on the theory of thick shells has been created. The article presents some results of calculating the stress-strain state of adapters and the growth of cracks in them.

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].

Effect of Sludge on the Stress–Strain State of Heat-Exchange Tubes of a Steam Generator

2019 ◽  
Vol 55 (1) ◽  
pp. 86-94 ◽  
Author(s):  
P. Z. Lugovoi ◽  
A. P. Shugailo ◽  
Ya. D. Kruglyi ◽  
A. M. Kolupaev
Keyword(s):  
Heat Exchange ◽  
Steam Generator ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State
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