Study on Thermal Conductivity of Accident Tolerant Fuels using Laser-based Thermoreflectance Technology

Wang Yuzhou; Zhang Qiang; Ma Xianfeng; Zhu Fei; Liao Jingjing

doi:10.13832/j.jnpe.2024.S1.0096

Volume 45 Issue S1

Jun. 2024

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Article Navigation > Nuclear Power Engineering > 2024 > 45(S1): 96-102

Wang Yuzhou, Zhang Qiang, Ma Xianfeng, Zhu Fei, Liao Jingjing. Study on Thermal Conductivity of Accident Tolerant Fuels using Laser-based Thermoreflectance Technology[J]. Nuclear Power Engineering, 2024, 45(S1): 96-102. doi: 10.13832/j.jnpe.2024.S1.0096

Citation:

Wang Yuzhou, Zhang Qiang, Ma Xianfeng, Zhu Fei, Liao Jingjing. Study on Thermal Conductivity of Accident Tolerant Fuels using Laser-based Thermoreflectance Technology[J]. Nuclear Power Engineering, 2024, 45(S1): 96-102. doi: 10.13832/j.jnpe.2024.S1.0096

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Study on Thermal Conductivity of Accident Tolerant Fuels using Laser-based Thermoreflectance Technology

doi: 10.13832/j.jnpe.2024.S1.0096

1.
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong, 519082, China
2.
Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2023-12-28
Rev Recd Date: 2024-03-27
Publish Date: 2024-06-15

Abstract

Abstract

In order to improve the thermal conductivity of new accident tolerant nuclear fuel and improve the detection efficiency and accuracy of thermal conductivity testing methods, this paper introduces the laser-based thermoreflectance technology with high spatial resolution and high testing frequency, expounds the basic principle, experimental equipment and testing method of this technology, and emphatically introduces the space-domain thermoreflectance technology developed for nuclear fuel research. Taking ion irradiated samples and coated nuclear fuel coatings as examples, the application scenarios of space-domain thermoreflectance technology in the field of in-situ testing are introduced. Aiming at the inhomogeneous damage distribution of ion irradiated samples, a multi-layer heat transfer model was developed to characterize the thermal conductivity of materials more accurately, and the quantitative attenuation law of thermal conductivity of UO₂ fuel with ion implantation dose was obtained by using this method. The heat transport properties of coatings in microencapsulated nuclear fuel particles at high temperature were accurately characterized, and the influence of defects on the thermal conductivity of pyrolytic carbon coatings was revealed by combining microstructure research. The thermoreflectance technology provides a powerful tool for investigating the impact of irradiation damage and structural defects on the thermal transport in nuclear fuel, and provides a reference for further improving fuel performance and developing high-fidelity simulation codes.
- Accident tolerant fuels,
- Thermal conductivity,
- Laser-based thermoreflectance

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References(30)

References

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