Numerical investigation of oxide layer growth of stainless steel LBE at a mesoscopic level
Document Type
Conference Proceeding
Publication Date
10-31-2009
Publication Title
ASME International Mechanical Engineering Congress and Exposition
Publisher
American Society of Mechanical Engineers
First page number:
1095
Last page number:
1107
Abstract
The corrosiveness of LBE, as an ideal coolant candidate in reactors and accelerator driven systems (ADS), presents a critical challenge for safe applications. One of the effective ways to protect the materials is to form and maintain a protective oxide film along the structural material surfaces by active oxygen control technology. The oxidation process of metals in lead bismuth eutectic (LBE) environment is investigated numerically at a mesoscopic scale. An improved stochastic cellular automaton model based on an improved Moore neighborhood is proposed to investigate the development of a continuous oxide layer of metals in LBE. The ionization of metal and the oxidation reaction were simulated with consideration of the transport of oxygen along the grain boundary and the diffusion of metallic ions. The model was benchmarked with a pure diffusion process, both with the analytical solution and with the previous work. Significant agreement was reached between the data. The developed model is also mapped with the experimental data from an LBE loop. A parametric study was conducted in order to check the importance of the main explicit parameters of the mesoscopic model. The boundary condition at the far end of the specimen has been investigated for the CA model.
Keywords
Active oxygen; Control systems; Diffusion (Physics); Eutectics; Grain boundaries; Ions; Ionization; Lead Bismuth; Metals; Nuclear reactors – Cooling; Oxidation; Oxide coating; Oxygen; Robots; Stainless steel
Disciplines
Engineering Science and Materials | Materials Science and Engineering | Mechanical Engineering | Nuclear Engineering
Language
English
Permissions
Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.
Repository Citation
Tan, T.,
Chen, Y.
(2009).
Numerical investigation of oxide layer growth of stainless steel LBE at a mesoscopic level.
ASME International Mechanical Engineering Congress and Exposition
1095-1107.
American Society of Mechanical Engineers.