Calculation of Stress Intensity Factor for Surface Cracks in FeCrAl Cladding under Force-Irradiation Coupling

Zhu Bida; Shi Kaikai; Zheng Bin

doi:10.13832/j.jnpe.2022.S2.0177

Volume 43 Issue S2

Dec. 2022

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Zhu Bida, Shi Kaikai, Zheng Bin. Calculation of Stress Intensity Factor for Surface Cracks in FeCrAl Cladding under Force-Irradiation Coupling[J]. Nuclear Power Engineering, 2022, 43(S2): 177-181. doi: 10.13832/j.jnpe.2022.S2.0177

Citation:

Zhu Bida, Shi Kaikai, Zheng Bin. Calculation of Stress Intensity Factor for Surface Cracks in FeCrAl Cladding under Force-Irradiation Coupling[J]. Nuclear Power Engineering, 2022, 43(S2): 177-181. doi: 10.13832/j.jnpe.2022.S2.0177

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Calculation of Stress Intensity Factor for Surface Cracks in FeCrAl Cladding under Force-Irradiation Coupling

doi: 10.13832/j.jnpe.2022.S2.0177

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-07-22
Rev Recd Date: 2022-10-03
Publish Date: 2022-12-31

Abstract

Abstract

In order to study the resistance of Ferritic FeCrAl alloy cladding to fracture failure under high radiation dose, the crack tip stress intensity factor of axial semi-elliptical surface crack of FeCrAl cladding tube under internal pressure and radiation swelling stress coupling load is calculated by finite element method combined with crack block analysis technique in Zencrack software. The change rule of stress intensity factor at crack tip with different depth on inner and outer surfaces under different radiation swelling strain distribution is obtained, and the influence of radiation swelling effect is analyzed. The results show that compared with the uniform radiation swelling strain distribution, when the radiation swelling strain of the cladding tube has a linear gradient in the radial direction, the crack tip stress intensity factor of the axial semi-elliptical crack on the inner surface decreases significantly. On the other hand, the crack tip stress intensity factor of the axial semi-elliptical crack on the outer surface increases significantly.
- FeCrAl,
- Irradiation swelling,
- Stress intensity factor,
- Semi-elliptical axial crack

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References

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