Analyzing the Occurrence Probability of Leaks and Ruptures in NPP Equipment Pipelines and Pressure Vessels Based on Physical and Statistical Modeling of Fracture Processes
Abstract
A software tool (ST) and methodology implemented in it for probabilistically assessing the reliability of reactor thick-walled pressure vessels are described. The basic principles of ST operation, the list of input data used in the computations, and possible objects for analysis are given.
The analysis is based on modeling the incipience and growth of cracks in the material. The techniques used for modeling the initial flaws in material are described that take into account the possibility of missing flaws during non-destructive testing, and for modeling the incipience and growth of cracks during operation of the object under consideration. The technique for assessing the pressure vessel wall strength characteristics is described.
To illustrate practical application of the ST, the results from probabilistically assessing the destruction of the PGV-1000 steam generator primary circuit header’s perforated zone are given. Graphic dependences of the leak and rupture occurrence probabilities on the steam generator operation time are presented. The list of possible engineering and scientific problems solved using the developed ST is also given.
References
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Для цитирования: Тутнов А.А., Лоскутов О.Д., Алексеев П.В., Тутнова А.В., Алексеев А.Т. Анализ вероятности появления течей и разрывов трубопроводов и корпусов оборудования атомных электростанций на основе физико-статистического моделирования процессов разрушения // Вестник МЭИ. 2020. № 1. С. 21—27. DOI: 10.24160/1993-6982-2020-1-21-27.
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For citation: Tutnov A.A., Loskutov O.D., Alekseev P.V., Tutnova A.V., Alekseev A.T. Analyzing the Occurrence Probability of Leaks and Ruptures in NPP Equipment Pipelines and Pressure Vessels Based on Physical and Statistical Modeling of Fracture Processes. Bulletin of MPEI. 2020;1:21—27. (in Russian). DOI: 10.24160/1993-6982-2020-1-21-27.
