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Применение ВАБ для разработки программы неразрушающего контроля трубопроводов АЭС

выпускная квалификационная работа магистра

Применение ВАБ для разработки программы неразрушающего контроля трубопроводов АЭС

Abstract

Данная работа посвящена оптимизации программы неразрушающего контроля (НК) трубопроводов первого контура АЭС при помощи риск-информированного подхода в процессе выполнения вероятностного анализа безопасности. В ходе работы были решены следующие задачи: 1. Анализ трубопроводов первого контура с целью выявления доминирующих механизмов деградации и зон, подлежащих НК. 2. Определение систем безопасности, задействованных в аварийных сценариях, и их критериев успеха. 3. Анализ надежности систем безопасности. 4. Моделирование аварийных сценариев методом деревьев событий и деревьев отказов. 5. Назначение категорий риска трубопроводам. 6. Выдача рекомендаций по обязательному количеству зон неразрушающего контроля. 7. Анализ изменения риска. 8. Создание методики управления изменением риска. В результате выполнения работы были выданы рекомендации по минимальному необходимому количеству зон контроля для трубопроводов первого контура АЭС с учетом изменения рисков тяжелой аварии и большого аварийного выброса. Также была предложена методика управления изменением риска и создана программа на языке Python для автоматизации анализа рисков и осуществления многовариантных расчетов оптимального числа зон контроля на ее основе.

This work is devoted to optimizing the program of non-destructive testing of pipelines of the primary coolant system of nuclear power plants using a risk-oriented approach within the framework of probabilistic safety analysis. During the work, the following tasks were solved: 1. Analysis of primary circuit pipelines for dominant degradation mechanisms and areas subject to non-destructive testing. 2. Definition of safety systems involved in emergency scenarios and their success criteria. 3. Analysis of the reliability of safety systems. 4. Modeling of emergency scenarios using the method of event trees and fault trees. 5. Categorization of pipelines according to the degree of risk of a severe accident. 6. Issuing recommendations on the mandatory number of non-destructive testing zones. 7. Analysis of risk changes. 8. Creation of a methodology for managing risk changes. As a result of the work, recommendations were issued on the minimum required number of control zones for pipelines of the first circuit of the NPP, considering the changing risks of core damage and a large emergency release. A method for managing risk changes was also proposed and a program was created in Python to automate risk analysis and implement multivariate calculations of the optimal number of control zones based on it.

Keywords

probabilistic safety analysis, риск-информированный Ð¿Ð¾Ð´Ñ Ð¾Ð´, non-destructive testing program, Атомные электрические станции, вероятностный анализ безопасности, Трубопроводы, программа неразрушающего контроля, risk-based approach

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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