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LAPSE:2023.11009

Effect of Temperature Gradient on Chloride Ion Diffusion in Nuclear Reactor Containment Building Concrete

Boohyun An, Pyungyeon Cho, Remilekun A. Shittu, Tae-Yeon Kim, Paul Rostron, Akram AlFantazi, Yongsun Yi

February 27, 2023

Abstract
Chloride diffusion through concrete is influenced by harsh environmental conditions such as high ambient temperature and relative humidity. This paper examined the influence of temperature gradient on chloride diffusion in concrete under high ambient temperature conditions. Chloride diffusion tests using cylindrical concrete samples were performed in constant temperature and temperature gradient conditions. In a temperature gradient condition, a much higher chloride concentration was measured than at constant temperatures, which could not be explained only by the mass diffusion driven by the concentration gradient. A new analytical model of chloride diffusion with the mass diffusion term including the temperature effect and the thermo-diffusion term including the temperature gradient effect was applied to the results, which showed that the thermo-diffusion contribution was significant. Using the analytical model with the mass diffusion (DCl) and thermo-diffusion (DT) coefficients, the service life of reactor containment buildings (RCBs) in nuclear power plants (NPPs) in the Middle Eastern and North African (MENA) region was estimated. The results showed that the service life of the RCBs could be reduced by the temperature gradient, indicating the possible application of the proposed analytical model.

Record ID

LAPSE:2023.11009

Keywords

chloride ion, mass diffusion, reactor containment building, temperature gradient, thermo-diffusion

Subject

Environment

Suggested Citation

An B, Cho P, Shittu RA, Kim TY, Rostron P, AlFantazi A, Yi Y. Effect of Temperature Gradient on Chloride Ion Diffusion in Nuclear Reactor Containment Building Concrete. (2023). LAPSE:2023.11009

Author Affiliations

An B: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates [ORCID]
Cho P: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Nuclear Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
Shittu RA: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Civil Infrastructure and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, Uni [ORCID]
Kim TY: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Civil Infrastructure and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, Uni
Rostron P: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Chemistry, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
AlFantazi A: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
Yi Y: Emirates Nuclear Technology Center, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates; Department of Nuclear Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates [ORCID]

Journal Name

Energies

Volume

Issue

First Page

5581

Year

2022

Publication Date

2022-08-01

DOI:

https://doi.org/10.3390/en15155581