Calculation of Stress Intensity Factor of External Surface Crack on the Nozzle of Steam Generator in Nuclear Power Plant

Zhang Ruikai; Liu Pan; Tan Jianping; Li Yue; Wang Dasheng; Tu Shandong

doi:10.13832/j.jnpe.2022.05.0138

Volume 43 Issue 5

Oct. 2022

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Zhang Ruikai, Liu Pan, Tan Jianping, Li Yue, Wang Dasheng, Tu Shandong. Calculation of Stress Intensity Factor of External Surface Crack on the Nozzle of Steam Generator in Nuclear Power Plant[J]. Nuclear Power Engineering, 2022, 43(5): 138-146. doi: 10.13832/j.jnpe.2022.05.0138

Citation:

Zhang Ruikai, Liu Pan, Tan Jianping, Li Yue, Wang Dasheng, Tu Shandong. Calculation of Stress Intensity Factor of External Surface Crack on the Nozzle of Steam Generator in Nuclear Power Plant[J]. Nuclear Power Engineering, 2022, 43(5): 138-146. doi: 10.13832/j.jnpe.2022.05.0138

Citation:

Zhang Ruikai, Liu Pan, Tan Jianping, Li Yue, Wang Dasheng, Tu Shandong. Calculation of Stress Intensity Factor of External Surface Crack on the Nozzle of Steam Generator in Nuclear Power Plant[J]. Nuclear Power Engineering, 2022, 43(5): 138-146. doi: 10.13832/j.jnpe.2022.05.0138

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Calculation of Stress Intensity Factor of External Surface Crack on the Nozzle of Steam Generator in Nuclear Power Plant

doi: 10.13832/j.jnpe.2022.05.0138

1.
Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China
2.
China Nuclear Power Engineering Co., Ltd., Shenzhen, Guangdong, 518124, China

Received Date: 2021-09-26
Accepted Date: 2021-11-12
Rev Recd Date: 2021-11-06
Publish Date: 2022-10-12

Abstract

Abstract

Due to the particularity of its structure, the nozzle of the nuclear steam generator (SG) is prone to defects during manufacturing and operating process. In order to evaluate the safety of the defect, the stress intensity factor solution available in engineering is required. In this paper, taking the external surface crack of nuclear SG nozzle as the research object, the equivalent stress intensity factors of cracks in different directions and sizes under internal pressure, bending moment and temperature loads are calculated by finite element method and RSE-M code, and the distribution law of equivalent stress intensity factors at the crack front under different loads is analyzed. By comparing the calculation results with the straight pipe stress intensity factor solution of RSE-M code, it is found that the straight pipe stress intensity factor calculation method of RSE-M code can be conservatively applied to the cracks at SG nozzle, and the conservation increases with increasing crack depth. In order to realize the accurate evaluation of the defect safety of SG nozzle, a calculation method of stress intensity factor applicable to the cracks on the external surface of SG nozzle is given based on finite element calculation and RSE-M influence coefficient method, which can provide guidance for the design and maintenance of SG nozzle.
- Stress intensity factor,
- Steam generator(SG),
- Nozzle,
- RSE-M code,
- Finite element method (FEM)

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References(12)

References

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