충격완충체의 효과를 고려할 수 있는 운반용기의 파열낙하시험 유한요소해석 방법

A Finite Element Modeling for the Puncture Drop Test of a Cask with the Failure of Impact Limiter

권기찬, 서기석, 유길성

Abstract

Transport package for radioactive material should be structurally safe under puncture drop condition and itssafety should be verified by test and numerical analysis. Most finite element analyses for puncture drop havebeen performed without modeling the impact limiter since failure is occurred in the materials of the impactlimiter. This paper presents a new modeling methodology, where an element is eroded in case that thematerial’s failure criteria are reached at the element’s integration point, to investigate the effect of the impactlimiter in the puncture process. The effectiveness of the proposed scheme is shown through the puncture dropanalysis of hotcell transport cask, which is under design in KAERI. The results show that about 80 percent of thetotal impact energy is absorbed due to the deformation of impact limiter. Using the present method thepuncture drop can be analyzed more accurately, but it would give conservative results compared to the actualtest condition.

Key Words : 파열낙하, 운반용기, 가상 사고조건, 충격완충체, 방사성물질, Puncture drop, Transport cask, Hypothetical accident condition, Impact limiter, Radioactivematerial.

Reference

JNFCWT

Online Submission

Korean Radioactive
Waste Society (KRS)

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