Research on the Closure Effect of Circumferential Through-Wall Cracks in Stainless Steel Piping under Residual Stress

Liu Zhenshun; Zhang Sheng; Mao Qing; Zheng Xiangyuan

doi:10.13832/j.jnpe.2023.02.0152

Volume 44 Issue 2

Apr. 2023

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Liu Zhenshun, Zhang Sheng, Mao Qing, Zheng Xiangyuan. Research on the Closure Effect of Circumferential Through-Wall Cracks in Stainless Steel Piping under Residual Stress[J]. Nuclear Power Engineering, 2023, 44(2): 152-158. doi: 10.13832/j.jnpe.2023.02.0152

Citation:

Liu Zhenshun, Zhang Sheng, Mao Qing, Zheng Xiangyuan. Research on the Closure Effect of Circumferential Through-Wall Cracks in Stainless Steel Piping under Residual Stress[J]. Nuclear Power Engineering, 2023, 44(2): 152-158. doi: 10.13832/j.jnpe.2023.02.0152

Citation:

Liu Zhenshun, Zhang Sheng, Mao Qing, Zheng Xiangyuan. Research on the Closure Effect of Circumferential Through-Wall Cracks in Stainless Steel Piping under Residual Stress[J]. Nuclear Power Engineering, 2023, 44(2): 152-158. doi: 10.13832/j.jnpe.2023.02.0152

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Research on the Closure Effect of Circumferential Through-Wall Cracks in Stainless Steel Piping under Residual Stress

doi: 10.13832/j.jnpe.2023.02.0152

Liu Zhenshun^{1, 2, 3
,},
Zhang Sheng^2
,,
Mao Qing^{1, 3},
Zheng Xiangyuan^{2
,
,}

1.
State Key Laboratory of Nuclear Power Safety Monitoring Tech. and Equip., Shenzhen, Guangdong, 518172, China
2.
Tsinghua Shenzhen International Graduate School, Shenzhen, Guangdong, 518055, China
3.
China Nuclear Power Engineering Co., Ltd., Shenzhen, Guangdong, 518124, China

Received Date: 2022-04-18
Rev Recd Date: 2022-08-15
Publish Date: 2023-04-15

Abstract

Abstract

The predicted value of the opening displacement of the circumferential through-wall crack (CTWC) in piping under different load levels is a critical parameter for the application of the leak-before-break (LBB) technology. In this paper, both numerical analysis and comparative verification are adopted to study the variation law of critical closure stress of CTWC under typical welding residual stress (WRS) based on actual measured material property curve in engineering for austenitic stainless steel piping with representative geometric dimensions. The analysis results reveal that both the current GE/RPRI method and the NUREG/CR-6837 correction method have underestimated the closure effect of CTWC in piping caused by simplified residual stress field recommended by the Task Group on Codes of American Society of Mechanical Engineers (ASME). In addition, the failure mode of piping under CTWC closure state is explored. On this basis, the influence of crack closure effect on the application of LBB technology is further discussed, which provides technical ideas that can be used as a reference for subsequent engineering practice.
- Welding residual stress,
- Through-wall crack,
- Closure effect,
- Leak-before-break,
- Stainless steel

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References(23)

References

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