This paper focuses on reliability assessment of creep rupture life under the service conditions at high temperatures and stresses for Gr. 91 steel which is considered as one of the prime structural materials for next-generation nuclear reactors. An interference model based on Z parameter, which is considered for the fluctuations of both service temperature and stress besides the scattering of rupture data, was analyzed and used to assess the reliability on creep rupture life of Gr. 91 steel. The scattering distribution of the creep rupture data of the Gr. 91 steel was investigated by using the Z parameter. It appeared that the Z parameter of creep rupture data for Gr.91 steel exhibited normal distribution. Using the normal distribution, a Monte-Carlo simulation (MCS) was carried out to generate a number of random variables for Zs and Zcr, and the reliability of the creep rupture life under the fluctuations of service temperature and stress conditions was estimated by using the interference model. It showed that the value of reliability decreased with increasing service time. Higher temperature caused the trend of faster deterioration. The value of reliability decreased rapidly at higher temperature fluctuation amplitude, and the reliability decreased as the scattering of the creep rupture data became serious.
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ASME 2011 Pressure Vessels and Piping Conference
July 17–21, 2011
Baltimore, Maryland, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4456-4
PROCEEDINGS PAPER
Reliability Assessment of Creep Rupture Life for Gr.91 Steel by an Interference Model Available to Purchase
Woo-Gon Kim,
Woo-Gon Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Jae-Young Park,
Jae-Young Park
Pukyong National University, Busan, Republic of Korea
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Song-Nan Yin,
Song-Nan Yin
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Dae-Whan Kim,
Dae-Whan Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Ji-Yeon Park,
Ji-Yeon Park
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
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Seon-Jin Kim
Seon-Jin Kim
Pukyong National University, Busan, Republic of Korea
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Woo-Gon Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Jae-Young Park
Pukyong National University, Busan, Republic of Korea
Song-Nan Yin
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Dae-Whan Kim
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Ji-Yeon Park
Korea Atomic Energy Research Institute, Daejeon, Republic of Korea
Seon-Jin Kim
Pukyong National University, Busan, Republic of Korea
Paper No:
PVP2011-57891, pp. 785-791; 7 pages
Published Online:
May 21, 2012
Citation
Kim, W, Park, J, Yin, S, Kim, D, Park, J, & Kim, S. "Reliability Assessment of Creep Rupture Life for Gr.91 Steel by an Interference Model." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Baltimore, Maryland, USA. July 17–21, 2011. pp. 785-791. ASME. https://doi.org/10.1115/PVP2011-57891
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