管道和核电站的氢脆研究:耐久性估计

Q4 Energy
A. Balueva, I. Dashevskiy, Christian Sims
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引用次数: 0

摘要

由于世界天然气和石油工业进一步发展的需要和公众对清洁能源的日益关注,研究和预防氢致裂化是核电站、输油管道和平台的主要安全问题之一。本文研究了内部氢致裂纹(HIC)的生长和孕育时间。具体来说,这些时间被建模为两个独立的阶段-第一阶段(I)是一个长时间近似,当裂纹扩展被认为是缓慢的,因此气体浓度的平衡状态立即建立,并且可以解决每个时刻的平稳扩散问题。第二阶段(II)是一个短时间近似,此时裂纹扩展迅速,原子氢的浓度与时间有关。在这两种情况下都得到了闭解,然后用pad近似进行了耦合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of Hydrogen Embrittlement in Pipelines and Nuclear Power Plants: Estimates for Durability
Due to the increasing need to further develop the world gas and oil industry and the increased public attention to clean energy sources, studying and preventing Hydrogen Induced Cracking is one of the main safety concerns in nuclear power plants, oil pipelines and platforms. In this article, the growth and incubation times for internal Hydrogen Induced Cracks (HIC) are examined. Specifically, these times are modeled in two separate phases - the first phase (I) is a long time approximation, when the crack growth is believed to be slow such that the equilibrium state for gas concentration establishes instantaneously, and the stationary diffusion problem can be solved for each moment of time. The second phase (II) is a short time approximation, when the crack growth is rapid and the concentration of atomic hydrogen is dependent on time. Closed-form solutions are obtained in both cases and are then coupled using a Padé approximation.
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来源期刊
Journal of Nuclear Energy Science and Power Generation Technology
Journal of Nuclear Energy Science and Power Generation Technology Energy-Energy Engineering and Power Technology
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