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Helical Steam Generator Tubes Containing Crack Under External Pressure: A Review of Applicability for Existing Integrity Evaluation Method

[+] Author Affiliations
Tae-Young Ryu, Han-Beom Seo, Jong-Min Kim, Jae-Boong Choi, Young-Jin Kim

Sungkyunkwan University, Suwon, Gyeonggi, Republic of Korea

Yoon-Suk Chang

Kyung Hee University, Yongin, Gyeonggi, Republic of Korea

Jong-Wook Kim, Sang-Yun Park

Korea Atomic Energy Research Institute, Daejeon, Republic of Korea

Paper No. PVP2011-57588, pp. 347-352; 6 pages
doi:10.1115/PVP2011-57588
From:
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 5: High-Pressure Technology; Nondestructive Evaluation; Nuclear Engineering
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4455-7
  • Copyright © 2011 by ASME

abstract

For integrity assessment of structure containing crack, evaluation method based on fracture mechanics such as linear-elastic and elastic-plastic fracture mechanics has been relatively common method and becoming more widespread. However, it can be used only if the crack opening or tearing is occurred. If the crack exists on the piping components subjected to internal pressure, net-section stress is occurred in the direction on crack opening no matter where crack locate. On the contrary to this, if the external pressure is applied to piping components, net-section stress is occurred opposite direction and it is expected crack opening not to be occur. The subject of this study is SMART steam generator tube which is designed as helical geometrical feature and to be pressurized outside. Three dimensional finite element analyses are carried out to investigate crack behavior under external pressure considered various crack geometries and locations. Furthermore, the possibility of failure of SMART steam generator tube under design pressure is investigated.

Copyright © 2011 by ASME

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