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http://dx.doi.org/10.7733/jnfcwt.2017.15.1.91

Evaluation of Canister Weld Flaw Depth for Concrete Storage Cask  

Moon, Tae-Chul (Korea Radioactive Waste Agency)
Cho, Chun-Hyung (Korea Radioactive Waste Agency)
Jung, Sung-Hun (Korea Nuclear Engineering & Service Corp)
Lee, Young-Oh (Korea Nuclear Engineering & Service Corp)
Jung, In-su (Korea Nuclear Engineering & Service Corp)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.15, no.1, 2017 , pp. 91-99 More about this Journal
Abstract
Domestically developed concrete storage casks include an internal canister to maintain the confinement integrity of radio-active materials. In this study, we analyzed the depth of flaws caused by loads that propagate canister weld cracks under normal, off-normal and accident conditions, and evaluated the maximum allowable weld flaw depth needed to secure the structural integrity of the canister weld and to reduce the welding time of the internal canister lid of the concrete storage cask. Structural analyses for normal, off-normal and accident conditions were performed using the general-purpose finite element analysis program ABAQUS; the allowable flaw depth was assessed according to ASME B&PV Code Section XI. Evaluation results revealed an allowable canister weld flaw depth of 18.75 mm for the concrete storage cask, which satisfies the critical flaw depth recommended in NUREG-1536.
Keywords
Concrete storage cask; Flaw depth; Stress ratio; Flow stress; Welding;
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  • Reference
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