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Insights from an OKMC simulation of dose rate effects on the irradiated microstructure of RPV model alloys
Li, Jianyang1,2; Zhang, Chonghong1; Martin-Bragado, Ignacio3; Yang, Yitao1; Wang, Tieshan2
2023-03
Source PublicationNuclear Engineering and Technology   Impact Factor & Quartile
ISSN1738-5733
Volume55Issue:3Pages:958-967
page numbers10
AbstractThis work studies the defect features in a dilute FeMnNi alloy by an Object Kinetic Monte Carlo (OKMC) model based on the grey-alloy method. The dose rate effect is studied at 573 K in a wide range of dose rates from 10-8 to 10-4 displacement per atom (dpa)/s and demonstrates that the density of defect clusters rises while the average size of defect clusters decreases with increasing dose rate. However, the dose-rate effect decreases with increasing irradiation dose. The model considered two realistic mechanisms for producing <100>-type self-interstitial atom (SIA) loops and gave reasonable production ratios compared with experimental results. Our simulation shows that the proportion of <100>-type SIA loops could change obviously with the dose rate, influencing hardening prediction for various dose rates irradiation. We also investigated ways to compensate for the dose rate effect. The simulation results verified that about a 100 K temperature shift at a high dose rate of 1 x 10-4 dpa/s could produce similar irradiation microstructures to a lower dose rate of 1 x 10-7 dpa/s irradiation, including matrix defects and deduced solute migration events. The work brings new insight into the OKMC modeling and the dose rate effect of the Fe-based alloys.(c) 2022 Korean Nuclear Society, Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
KeywordIrradiation defects RPV model Alloy Dose -rate effect Object kinetic Monte Carlo
PublisherKOREAN NUCLEAR SOC
DOI10.1016/j.net.2022.11.018
Indexed BySCIE
Language英语
WOS Research AreaNuclear Science & Technology
WOS SubjectNuclear Science & Technology
WOS IDWOS:000961670000001
Original Document TypeArticle
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/501067
Collection兰州大学
Corresponding AuthorZhang, Chonghong
Affiliation
1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China;
2.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;
3.Univ Catolica Murcia, Campus Jeronimos, E-03017 Murcia, Spain
Recommended Citation
GB/T 7714
Li, Jianyang,Zhang, Chonghong,Martin-Bragado, Ignacio,et al. Insights from an OKMC simulation of dose rate effects on the irradiated microstructure of RPV model alloys[J]. Nuclear Engineering and Technology,2023,55(3):958-967.
APA Li, Jianyang,Zhang, Chonghong,Martin-Bragado, Ignacio,Yang, Yitao,&Wang, Tieshan.(2023).Insights from an OKMC simulation of dose rate effects on the irradiated microstructure of RPV model alloys.Nuclear Engineering and Technology,55(3),958-967.
MLA Li, Jianyang,et al."Insights from an OKMC simulation of dose rate effects on the irradiated microstructure of RPV model alloys".Nuclear Engineering and Technology 55.3(2023):958-967.
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