Abstract
In this paper, a strain-based failure assessment is performed on a canister made of stainless steel when a spent nuclear fuel dry storage system goes through a drop accident, to investigate the effects of strain rate on strain-based failure assessment results. The KORAD-21 multi-purpose dry storage container system developed for interim storage and transportation at the Korea Radioactive Waste Agency (KORAD) is considered. A finite element (FE) analysis is performed on a 1m puncture drop of the KORAD-21 model. Based on the FE results, the canister under a 1m puncture drop is evaluated by two different criteria: (1) strain-based acceptance criteria suggested in ASME Boiler and Pressure Vessels Code Section III, Appendix FF, “Strain-based acceptance criteria for energy-limited events” and (2) the Johnson-Cook fracture strain model based on experimental data. The difference between the two criteria is that the Johnson-Cook fracture strain model expresses the true fracture strain as a function of stress triaxiality and strain rate, whereas the formula in App. FF establishes strain limit (combination of uniform strain and true fracture strain) as a function of stress triaxiality only. In this study, the safety margins of Appendix FF are analyzed by comparing the failure assessment results for canister drop simulation with those applying the Johnson-Cook fracture strain model.
Original language | English |
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Title of host publication | Materials and Fabrication |
Publisher | American Society of Mechanical Engineers (ASME) |
ISBN (Electronic) | 9780791886182 |
DOIs | |
Publication status | Published - 2022 |
Event | ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States Duration: 2022 Jul 17 → 2022 Jul 22 |
Publication series
Name | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
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Volume | 4-B |
ISSN (Print) | 0277-027X |
Conference
Conference | ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 |
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Country/Territory | United States |
City | Las Vegas |
Period | 22/7/17 → 22/7/22 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2019M2D2A2048296).
Publisher Copyright:
Copyright © 2022 by ASME.
Keywords
- Johnson-Cook fracture strain model
- Spent fuel dry storage canister
- Strain rate
- Strain-based acceptance criteria
- Stress triaxiality
ASJC Scopus subject areas
- Mechanical Engineering