Abstract
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 language | English |
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Title of host publication | Materials and Fabrication |
Publisher | American Society of Mechanical Engineers (ASME) |
ISBN (Electronic) | 9780791887486 |
DOIs | |
Publication status | Published - 2023 |
Event | ASME 2023 Pressure Vessels and Piping Conference, PVP 2023 - Atlanta, United States Duration: 2023 Jul 16 → 2023 Jul 21 |
Publication series
Name | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
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Volume | 5 |
ISSN (Print) | 0277-027X |
Conference
Conference | ASME 2023 Pressure Vessels and Piping Conference, PVP 2023 |
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Country/Territory | United States |
City | Atlanta |
Period | 23/7/16 → 23/7/21 |
Bibliographical note
Publisher Copyright:© 2023 American Society of Mechanical Engineers (ASME). All rights reserved.
Keywords
- Critical crack depth
- Drop accident analysis
- Failure assessment diagram (FAD)
- Multi-purpose canister (MPC)
ASJC Scopus subject areas
- Mechanical Engineering