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http://dx.doi.org/10.12989/sem.2016.60.2.337

Assessment of steel components and reinforced concrete structures under steam explosion conditions  

Kim, Seung Hyun (Department of Nuclear Engineering, Kyung Hee University)
Chang, Yoon-Suk (Department of Nuclear Engineering, Kyung Hee University)
Cho, Yong-Jin (Korea Institute of Nuclear Safety)
Publication Information
Structural Engineering and Mechanics / v.60, no.2, 2016 , pp. 337-350 More about this Journal
Abstract
Even though extensive researches have been performed for steam explosion due to their complex mechanisms and inherent uncertainties, establishment of severe accident management guidelines and strategies is one of state-of-the arts in nuclear industry. The goal of this research is primarily to examine effects of vessel failure modes and locations on nuclear facilities under typical steam explosion conditions. Both discrete and integrated models were employed from the viewpoint of structural integrity assessment of steel components and evaluation of the cracking and crushing in reinforced concrete structures. Thereafter, comparison of systematic analysis results was performed; despite the vessel failure modes were dominant, resulting maximum stresses at the all steel components were sufficiently lower than the corresponding yield strengths. Two failure criteria for the reinforced concrete structures such as the limiting failure ratio of concrete and the limiting strains for rebar and liner plate were satisfied under steam explosion conditions. Moreover, stresses of steel components and reinforced concrete structures were reduced with maximum difference of 12% when the integrated model was adopted comparing to those of discrete models.
Keywords
containment wall penetration; finite element analysis; main piping; reactor cavity; steam explosion;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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