Development of an oxidation model for the prediction of the corrosion risk induced by deposits on cladding surface in PWRs

•An oxidation model is developed to predict the corrosion of the Zr-4 cladding.•The model is applicable to the wide range of boron and lithium concentrations.•CILC risk is predicted with the combination of the local thermal-hydraulic model. The enhancement of the temperature and the concentration of...

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Veröffentlicht in:Journal of nuclear materials 2023-12, Vol.586, p.154698, Article 154698
Hauptverfasser: Shen, Yuan, Tan, Shiyu, Lai, Yunchen, Hou, Hongguo, Chao, Nan, Jiao, Caishan, Zhou, Yu, Gao, Yang
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Sprache:eng
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Zusammenfassung:•An oxidation model is developed to predict the corrosion of the Zr-4 cladding.•The model is applicable to the wide range of boron and lithium concentrations.•CILC risk is predicted with the combination of the local thermal-hydraulic model. The enhancement of the temperature and the concentration of the species on the cladding surface induced by deposits (CRUD) increases the risk of the cladding corrosion in PWR. An oxidation model is developed to accurately predict the corrosion of the Zr-4 cladding in PWRs under the wide range of the boron and lithium concentrations here. Combining this oxidation model with the local thermal-hydraulic model, the CRUD induced local corrosion (CILC) is well predicted and analyzed under various operational conditions, hydrochemical conditions, and CRUD structural parameters. The effects of different conditions on CILC are clearly reflected by the corrosion risk values.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2023.154698