EFFECTS OF STRAIN RATE ON STRAIN-BASED FAILURE ASSESSMENT OF CASK 1M-PUNCTURE DROP FOR 304 STAINLESS STEEL

Hune Tae Kim, Jun Min Seo, Ji Hye Kim, Yun Jae Kim

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

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 languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791886182
DOIs
Publication statusPublished - 2022
EventASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States
Duration: 2022 Jul 172022 Jul 22

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume4-B
ISSN (Print)0277-027X

Conference

ConferenceASME 2022 Pressure Vessels and Piping Conference, PVP 2022
Country/TerritoryUnited States
CityLas Vegas
Period22/7/1722/7/22

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

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