Jae Yoon Jeong, Cheol Ho Kim, Yun Jae Kim, Chang Young Oh, Hune Tae Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Multi-purpose canisters (MPCs) made of austenitic stainless steel are used to store spent nuclear fuels (SNF) for long periods. During long-term storage, chloride-induced stress corrosion cracking (CISCC) can occur on the external surface of MPC. In this respect, a structural integrity assessment of MPC with possible CISCC defects under accident scenarios such as drop accidents during transportation needs to be performed. In this paper, fracture mechanics analysis is performed to calculate critical crack sizes under the 9m drop accident suggested at IAEA (International Atomic Energy Agency) SSR-6 (rev. 1). For the MPC model, the KORAD (Korea Radioactive Waste Agency)-21 model was used. Elastic-plastic impact simulation was firstly performed using the strain-rate dependent material properties to identify critical locations showing the highest stresses during impact. The postulated crack is assumed to be the external semi-elliptical longitudinal and circumferential crack. Then fracture mechanics analysis is performed using the failure assessment diagram (FAD) approach. The reference stress was calculated using the method suggested in API 579/ASME FFS-1. The stress intensity factor is calculated using the weight function method in ASME Section XI, Appendix A. Using the FAD approach, the critical crack size is calculated. The sensitivity analysis is performed to investigate the effect of the strain rate on calculated critical crack sizes.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791887486
Publication statusPublished - 2023
EventASME 2023 Pressure Vessels and Piping Conference, PVP 2023 - Atlanta, United States
Duration: 2023 Jul 162023 Jul 21

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ISSN (Print)0277-027X


ConferenceASME 2023 Pressure Vessels and Piping Conference, PVP 2023
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2023 American Society of Mechanical Engineers (ASME). All rights reserved.


  • Critical crack depth
  • Drop accident analysis
  • Failure assessment diagram (FAD)
  • Multi-purpose canister (MPC)

ASJC Scopus subject areas

  • Mechanical Engineering


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